1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 1999 - 2018 Intel Corporation. */ 3 4 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 5 6 #include <linux/module.h> 7 #include <linux/types.h> 8 #include <linux/init.h> 9 #include <linux/pci.h> 10 #include <linux/vmalloc.h> 11 #include <linux/pagemap.h> 12 #include <linux/delay.h> 13 #include <linux/netdevice.h> 14 #include <linux/interrupt.h> 15 #include <linux/tcp.h> 16 #include <linux/ipv6.h> 17 #include <linux/slab.h> 18 #include <net/checksum.h> 19 #include <net/ip6_checksum.h> 20 #include <linux/ethtool.h> 21 #include <linux/if_vlan.h> 22 #include <linux/cpu.h> 23 #include <linux/smp.h> 24 #include <linux/pm_qos.h> 25 #include <linux/pm_runtime.h> 26 #include <linux/prefetch.h> 27 #include <linux/suspend.h> 28 29 #include "e1000.h" 30 #define CREATE_TRACE_POINTS 31 #include "e1000e_trace.h" 32 33 char e1000e_driver_name[] = "e1000e"; 34 35 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) 36 static int debug = -1; 37 module_param(debug, int, 0); 38 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 39 40 static const struct e1000_info *e1000_info_tbl[] = { 41 [board_82571] = &e1000_82571_info, 42 [board_82572] = &e1000_82572_info, 43 [board_82573] = &e1000_82573_info, 44 [board_82574] = &e1000_82574_info, 45 [board_82583] = &e1000_82583_info, 46 [board_80003es2lan] = &e1000_es2_info, 47 [board_ich8lan] = &e1000_ich8_info, 48 [board_ich9lan] = &e1000_ich9_info, 49 [board_ich10lan] = &e1000_ich10_info, 50 [board_pchlan] = &e1000_pch_info, 51 [board_pch2lan] = &e1000_pch2_info, 52 [board_pch_lpt] = &e1000_pch_lpt_info, 53 [board_pch_spt] = &e1000_pch_spt_info, 54 [board_pch_cnp] = &e1000_pch_cnp_info, 55 [board_pch_tgp] = &e1000_pch_tgp_info, 56 [board_pch_adp] = &e1000_pch_adp_info, 57 [board_pch_mtp] = &e1000_pch_mtp_info, 58 [board_pch_ptp] = &e1000_pch_ptp_info, 59 }; 60 61 struct e1000_reg_info { 62 u32 ofs; 63 char *name; 64 }; 65 66 static const struct e1000_reg_info e1000_reg_info_tbl[] = { 67 /* General Registers */ 68 {E1000_CTRL, "CTRL"}, 69 {E1000_STATUS, "STATUS"}, 70 {E1000_CTRL_EXT, "CTRL_EXT"}, 71 72 /* Interrupt Registers */ 73 {E1000_ICR, "ICR"}, 74 75 /* Rx Registers */ 76 {E1000_RCTL, "RCTL"}, 77 {E1000_RDLEN(0), "RDLEN"}, 78 {E1000_RDH(0), "RDH"}, 79 {E1000_RDT(0), "RDT"}, 80 {E1000_RDTR, "RDTR"}, 81 {E1000_RXDCTL(0), "RXDCTL"}, 82 {E1000_ERT, "ERT"}, 83 {E1000_RDBAL(0), "RDBAL"}, 84 {E1000_RDBAH(0), "RDBAH"}, 85 {E1000_RDFH, "RDFH"}, 86 {E1000_RDFT, "RDFT"}, 87 {E1000_RDFHS, "RDFHS"}, 88 {E1000_RDFTS, "RDFTS"}, 89 {E1000_RDFPC, "RDFPC"}, 90 91 /* Tx Registers */ 92 {E1000_TCTL, "TCTL"}, 93 {E1000_TDBAL(0), "TDBAL"}, 94 {E1000_TDBAH(0), "TDBAH"}, 95 {E1000_TDLEN(0), "TDLEN"}, 96 {E1000_TDH(0), "TDH"}, 97 {E1000_TDT(0), "TDT"}, 98 {E1000_TIDV, "TIDV"}, 99 {E1000_TXDCTL(0), "TXDCTL"}, 100 {E1000_TADV, "TADV"}, 101 {E1000_TARC(0), "TARC"}, 102 {E1000_TDFH, "TDFH"}, 103 {E1000_TDFT, "TDFT"}, 104 {E1000_TDFHS, "TDFHS"}, 105 {E1000_TDFTS, "TDFTS"}, 106 {E1000_TDFPC, "TDFPC"}, 107 108 /* List Terminator */ 109 {0, NULL} 110 }; 111 112 /** 113 * __ew32_prepare - prepare to write to MAC CSR register on certain parts 114 * @hw: pointer to the HW structure 115 * 116 * When updating the MAC CSR registers, the Manageability Engine (ME) could 117 * be accessing the registers at the same time. Normally, this is handled in 118 * h/w by an arbiter but on some parts there is a bug that acknowledges Host 119 * accesses later than it should which could result in the register to have 120 * an incorrect value. Workaround this by checking the FWSM register which 121 * has bit 24 set while ME is accessing MAC CSR registers, wait if it is set 122 * and try again a number of times. 123 **/ 124 static void __ew32_prepare(struct e1000_hw *hw) 125 { 126 s32 i = E1000_ICH_FWSM_PCIM2PCI_COUNT; 127 128 while ((er32(FWSM) & E1000_ICH_FWSM_PCIM2PCI) && --i) 129 udelay(50); 130 } 131 132 void __ew32(struct e1000_hw *hw, unsigned long reg, u32 val) 133 { 134 if (hw->adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 135 __ew32_prepare(hw); 136 137 writel(val, hw->hw_addr + reg); 138 } 139 140 /** 141 * e1000_regdump - register printout routine 142 * @hw: pointer to the HW structure 143 * @reginfo: pointer to the register info table 144 **/ 145 static void e1000_regdump(struct e1000_hw *hw, struct e1000_reg_info *reginfo) 146 { 147 int n = 0; 148 char rname[16]; 149 u32 regs[8]; 150 151 switch (reginfo->ofs) { 152 case E1000_RXDCTL(0): 153 for (n = 0; n < 2; n++) 154 regs[n] = __er32(hw, E1000_RXDCTL(n)); 155 break; 156 case E1000_TXDCTL(0): 157 for (n = 0; n < 2; n++) 158 regs[n] = __er32(hw, E1000_TXDCTL(n)); 159 break; 160 case E1000_TARC(0): 161 for (n = 0; n < 2; n++) 162 regs[n] = __er32(hw, E1000_TARC(n)); 163 break; 164 default: 165 pr_info("%-15s %08x\n", 166 reginfo->name, __er32(hw, reginfo->ofs)); 167 return; 168 } 169 170 snprintf(rname, 16, "%s%s", reginfo->name, "[0-1]"); 171 pr_info("%-15s %08x %08x\n", rname, regs[0], regs[1]); 172 } 173 174 static void e1000e_dump_ps_pages(struct e1000_adapter *adapter, 175 struct e1000_buffer *bi) 176 { 177 int i; 178 struct e1000_ps_page *ps_page; 179 180 for (i = 0; i < adapter->rx_ps_pages; i++) { 181 ps_page = &bi->ps_pages[i]; 182 183 if (ps_page->page) { 184 pr_info("packet dump for ps_page %d:\n", i); 185 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 186 16, 1, page_address(ps_page->page), 187 PAGE_SIZE, true); 188 } 189 } 190 } 191 192 /** 193 * e1000e_dump - Print registers, Tx-ring and Rx-ring 194 * @adapter: board private structure 195 **/ 196 static void e1000e_dump(struct e1000_adapter *adapter) 197 { 198 struct net_device *netdev = adapter->netdev; 199 struct e1000_hw *hw = &adapter->hw; 200 struct e1000_reg_info *reginfo; 201 struct e1000_ring *tx_ring = adapter->tx_ring; 202 struct e1000_tx_desc *tx_desc; 203 struct my_u0 { 204 __le64 a; 205 __le64 b; 206 } *u0; 207 struct e1000_buffer *buffer_info; 208 struct e1000_ring *rx_ring = adapter->rx_ring; 209 union e1000_rx_desc_packet_split *rx_desc_ps; 210 union e1000_rx_desc_extended *rx_desc; 211 struct my_u1 { 212 __le64 a; 213 __le64 b; 214 __le64 c; 215 __le64 d; 216 } *u1; 217 u32 staterr; 218 int i = 0; 219 220 if (!netif_msg_hw(adapter)) 221 return; 222 223 /* Print netdevice Info */ 224 if (netdev) { 225 dev_info(&adapter->pdev->dev, "Net device Info\n"); 226 pr_info("Device Name state trans_start\n"); 227 pr_info("%-15s %016lX %016lX\n", netdev->name, 228 netdev->state, dev_trans_start(netdev)); 229 } 230 231 /* Print Registers */ 232 dev_info(&adapter->pdev->dev, "Register Dump\n"); 233 pr_info(" Register Name Value\n"); 234 for (reginfo = (struct e1000_reg_info *)e1000_reg_info_tbl; 235 reginfo->name; reginfo++) { 236 e1000_regdump(hw, reginfo); 237 } 238 239 /* Print Tx Ring Summary */ 240 if (!netdev || !netif_running(netdev)) 241 return; 242 243 dev_info(&adapter->pdev->dev, "Tx Ring Summary\n"); 244 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n"); 245 buffer_info = &tx_ring->buffer_info[tx_ring->next_to_clean]; 246 pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n", 247 0, tx_ring->next_to_use, tx_ring->next_to_clean, 248 (unsigned long long)buffer_info->dma, 249 buffer_info->length, 250 buffer_info->next_to_watch, 251 (unsigned long long)buffer_info->time_stamp); 252 253 /* Print Tx Ring */ 254 if (!netif_msg_tx_done(adapter)) 255 goto rx_ring_summary; 256 257 dev_info(&adapter->pdev->dev, "Tx Ring Dump\n"); 258 259 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended) 260 * 261 * Legacy Transmit Descriptor 262 * +--------------------------------------------------------------+ 263 * 0 | Buffer Address [63:0] (Reserved on Write Back) | 264 * +--------------------------------------------------------------+ 265 * 8 | Special | CSS | Status | CMD | CSO | Length | 266 * +--------------------------------------------------------------+ 267 * 63 48 47 36 35 32 31 24 23 16 15 0 268 * 269 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload 270 * 63 48 47 40 39 32 31 16 15 8 7 0 271 * +----------------------------------------------------------------+ 272 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS | 273 * +----------------------------------------------------------------+ 274 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN | 275 * +----------------------------------------------------------------+ 276 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 277 * 278 * Extended Data Descriptor (DTYP=0x1) 279 * +----------------------------------------------------------------+ 280 * 0 | Buffer Address [63:0] | 281 * +----------------------------------------------------------------+ 282 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN | 283 * +----------------------------------------------------------------+ 284 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 285 */ 286 pr_info("Tl[desc] [address 63:0 ] [SpeCssSCmCsLen] [bi->dma ] leng ntw timestamp bi->skb <-- Legacy format\n"); 287 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Context format\n"); 288 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Data format\n"); 289 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) { 290 const char *next_desc; 291 tx_desc = E1000_TX_DESC(*tx_ring, i); 292 buffer_info = &tx_ring->buffer_info[i]; 293 u0 = (struct my_u0 *)tx_desc; 294 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean) 295 next_desc = " NTC/U"; 296 else if (i == tx_ring->next_to_use) 297 next_desc = " NTU"; 298 else if (i == tx_ring->next_to_clean) 299 next_desc = " NTC"; 300 else 301 next_desc = ""; 302 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p%s\n", 303 (!(le64_to_cpu(u0->b) & BIT(29)) ? 'l' : 304 ((le64_to_cpu(u0->b) & BIT(20)) ? 'd' : 'c')), 305 i, 306 (unsigned long long)le64_to_cpu(u0->a), 307 (unsigned long long)le64_to_cpu(u0->b), 308 (unsigned long long)buffer_info->dma, 309 buffer_info->length, buffer_info->next_to_watch, 310 (unsigned long long)buffer_info->time_stamp, 311 buffer_info->skb, next_desc); 312 313 if (netif_msg_pktdata(adapter) && buffer_info->skb) 314 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 315 16, 1, buffer_info->skb->data, 316 buffer_info->skb->len, true); 317 } 318 319 /* Print Rx Ring Summary */ 320 rx_ring_summary: 321 dev_info(&adapter->pdev->dev, "Rx Ring Summary\n"); 322 pr_info("Queue [NTU] [NTC]\n"); 323 pr_info(" %5d %5X %5X\n", 324 0, rx_ring->next_to_use, rx_ring->next_to_clean); 325 326 /* Print Rx Ring */ 327 if (!netif_msg_rx_status(adapter)) 328 return; 329 330 dev_info(&adapter->pdev->dev, "Rx Ring Dump\n"); 331 switch (adapter->rx_ps_pages) { 332 case 1: 333 case 2: 334 case 3: 335 /* [Extended] Packet Split Receive Descriptor Format 336 * 337 * +-----------------------------------------------------+ 338 * 0 | Buffer Address 0 [63:0] | 339 * +-----------------------------------------------------+ 340 * 8 | Buffer Address 1 [63:0] | 341 * +-----------------------------------------------------+ 342 * 16 | Buffer Address 2 [63:0] | 343 * +-----------------------------------------------------+ 344 * 24 | Buffer Address 3 [63:0] | 345 * +-----------------------------------------------------+ 346 */ 347 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"); 348 /* [Extended] Receive Descriptor (Write-Back) Format 349 * 350 * 63 48 47 32 31 13 12 8 7 4 3 0 351 * +------------------------------------------------------+ 352 * 0 | Packet | IP | Rsvd | MRQ | Rsvd | MRQ RSS | 353 * | Checksum | Ident | | Queue | | Type | 354 * +------------------------------------------------------+ 355 * 8 | VLAN Tag | Length | Extended Error | Extended Status | 356 * +------------------------------------------------------+ 357 * 63 48 47 32 31 20 19 0 358 */ 359 pr_info("RWB[desc] [ck ipid mrqhsh] [vl l0 ee es] [ l3 l2 l1 hs] [reserved ] ---------------- [bi->skb] <-- Ext Rx Write-Back format\n"); 360 for (i = 0; i < rx_ring->count; i++) { 361 const char *next_desc; 362 buffer_info = &rx_ring->buffer_info[i]; 363 rx_desc_ps = E1000_RX_DESC_PS(*rx_ring, i); 364 u1 = (struct my_u1 *)rx_desc_ps; 365 staterr = 366 le32_to_cpu(rx_desc_ps->wb.middle.status_error); 367 368 if (i == rx_ring->next_to_use) 369 next_desc = " NTU"; 370 else if (i == rx_ring->next_to_clean) 371 next_desc = " NTC"; 372 else 373 next_desc = ""; 374 375 if (staterr & E1000_RXD_STAT_DD) { 376 /* Descriptor Done */ 377 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX ---------------- %p%s\n", 378 "RWB", i, 379 (unsigned long long)le64_to_cpu(u1->a), 380 (unsigned long long)le64_to_cpu(u1->b), 381 (unsigned long long)le64_to_cpu(u1->c), 382 (unsigned long long)le64_to_cpu(u1->d), 383 buffer_info->skb, next_desc); 384 } else { 385 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX %016llX %p%s\n", 386 "R ", i, 387 (unsigned long long)le64_to_cpu(u1->a), 388 (unsigned long long)le64_to_cpu(u1->b), 389 (unsigned long long)le64_to_cpu(u1->c), 390 (unsigned long long)le64_to_cpu(u1->d), 391 (unsigned long long)buffer_info->dma, 392 buffer_info->skb, next_desc); 393 394 if (netif_msg_pktdata(adapter)) 395 e1000e_dump_ps_pages(adapter, 396 buffer_info); 397 } 398 } 399 break; 400 default: 401 case 0: 402 /* Extended Receive Descriptor (Read) Format 403 * 404 * +-----------------------------------------------------+ 405 * 0 | Buffer Address [63:0] | 406 * +-----------------------------------------------------+ 407 * 8 | Reserved | 408 * +-----------------------------------------------------+ 409 */ 410 pr_info("R [desc] [buf addr 63:0 ] [reserved 63:0 ] [bi->dma ] [bi->skb] <-- Ext (Read) format\n"); 411 /* Extended Receive Descriptor (Write-Back) Format 412 * 413 * 63 48 47 32 31 24 23 4 3 0 414 * +------------------------------------------------------+ 415 * | RSS Hash | | | | 416 * 0 +-------------------+ Rsvd | Reserved | MRQ RSS | 417 * | Packet | IP | | | Type | 418 * | Checksum | Ident | | | | 419 * +------------------------------------------------------+ 420 * 8 | VLAN Tag | Length | Extended Error | Extended Status | 421 * +------------------------------------------------------+ 422 * 63 48 47 32 31 20 19 0 423 */ 424 pr_info("RWB[desc] [cs ipid mrq] [vt ln xe xs] [bi->skb] <-- Ext (Write-Back) format\n"); 425 426 for (i = 0; i < rx_ring->count; i++) { 427 const char *next_desc; 428 429 buffer_info = &rx_ring->buffer_info[i]; 430 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 431 u1 = (struct my_u1 *)rx_desc; 432 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 433 434 if (i == rx_ring->next_to_use) 435 next_desc = " NTU"; 436 else if (i == rx_ring->next_to_clean) 437 next_desc = " NTC"; 438 else 439 next_desc = ""; 440 441 if (staterr & E1000_RXD_STAT_DD) { 442 /* Descriptor Done */ 443 pr_info("%s[0x%03X] %016llX %016llX ---------------- %p%s\n", 444 "RWB", i, 445 (unsigned long long)le64_to_cpu(u1->a), 446 (unsigned long long)le64_to_cpu(u1->b), 447 buffer_info->skb, next_desc); 448 } else { 449 pr_info("%s[0x%03X] %016llX %016llX %016llX %p%s\n", 450 "R ", i, 451 (unsigned long long)le64_to_cpu(u1->a), 452 (unsigned long long)le64_to_cpu(u1->b), 453 (unsigned long long)buffer_info->dma, 454 buffer_info->skb, next_desc); 455 456 if (netif_msg_pktdata(adapter) && 457 buffer_info->skb) 458 print_hex_dump(KERN_INFO, "", 459 DUMP_PREFIX_ADDRESS, 16, 460 1, 461 buffer_info->skb->data, 462 adapter->rx_buffer_len, 463 true); 464 } 465 } 466 } 467 } 468 469 /** 470 * e1000_desc_unused - calculate if we have unused descriptors 471 * @ring: pointer to ring struct to perform calculation on 472 **/ 473 static int e1000_desc_unused(struct e1000_ring *ring) 474 { 475 if (ring->next_to_clean > ring->next_to_use) 476 return ring->next_to_clean - ring->next_to_use - 1; 477 478 return ring->count + ring->next_to_clean - ring->next_to_use - 1; 479 } 480 481 /** 482 * e1000e_systim_to_hwtstamp - convert system time value to hw time stamp 483 * @adapter: board private structure 484 * @hwtstamps: time stamp structure to update 485 * @systim: unsigned 64bit system time value. 486 * 487 * Convert the system time value stored in the RX/TXSTMP registers into a 488 * hwtstamp which can be used by the upper level time stamping functions. 489 * 490 * The 'systim_lock' spinlock is used to protect the consistency of the 491 * system time value. This is needed because reading the 64 bit time 492 * value involves reading two 32 bit registers. The first read latches the 493 * value. 494 **/ 495 static void e1000e_systim_to_hwtstamp(struct e1000_adapter *adapter, 496 struct skb_shared_hwtstamps *hwtstamps, 497 u64 systim) 498 { 499 u64 ns; 500 unsigned long flags; 501 502 spin_lock_irqsave(&adapter->systim_lock, flags); 503 ns = timecounter_cyc2time(&adapter->tc, systim); 504 spin_unlock_irqrestore(&adapter->systim_lock, flags); 505 506 memset(hwtstamps, 0, sizeof(*hwtstamps)); 507 hwtstamps->hwtstamp = ns_to_ktime(ns); 508 } 509 510 /** 511 * e1000e_rx_hwtstamp - utility function which checks for Rx time stamp 512 * @adapter: board private structure 513 * @status: descriptor extended error and status field 514 * @skb: particular skb to include time stamp 515 * 516 * If the time stamp is valid, convert it into the timecounter ns value 517 * and store that result into the shhwtstamps structure which is passed 518 * up the network stack. 519 **/ 520 static void e1000e_rx_hwtstamp(struct e1000_adapter *adapter, u32 status, 521 struct sk_buff *skb) 522 { 523 struct e1000_hw *hw = &adapter->hw; 524 u64 rxstmp; 525 526 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP) || 527 !(status & E1000_RXDEXT_STATERR_TST) || 528 !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID)) 529 return; 530 531 /* The Rx time stamp registers contain the time stamp. No other 532 * received packet will be time stamped until the Rx time stamp 533 * registers are read. Because only one packet can be time stamped 534 * at a time, the register values must belong to this packet and 535 * therefore none of the other additional attributes need to be 536 * compared. 537 */ 538 rxstmp = (u64)er32(RXSTMPL); 539 rxstmp |= (u64)er32(RXSTMPH) << 32; 540 e1000e_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), rxstmp); 541 542 adapter->flags2 &= ~FLAG2_CHECK_RX_HWTSTAMP; 543 } 544 545 /** 546 * e1000_receive_skb - helper function to handle Rx indications 547 * @adapter: board private structure 548 * @netdev: pointer to netdev struct 549 * @staterr: descriptor extended error and status field as written by hardware 550 * @vlan: descriptor vlan field as written by hardware (no le/be conversion) 551 * @skb: pointer to sk_buff to be indicated to stack 552 **/ 553 static void e1000_receive_skb(struct e1000_adapter *adapter, 554 struct net_device *netdev, struct sk_buff *skb, 555 u32 staterr, __le16 vlan) 556 { 557 u16 tag = le16_to_cpu(vlan); 558 559 e1000e_rx_hwtstamp(adapter, staterr, skb); 560 561 skb->protocol = eth_type_trans(skb, netdev); 562 563 if (staterr & E1000_RXD_STAT_VP) 564 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag); 565 566 napi_gro_receive(&adapter->napi, skb); 567 } 568 569 /** 570 * e1000_rx_checksum - Receive Checksum Offload 571 * @adapter: board private structure 572 * @status_err: receive descriptor status and error fields 573 * @skb: socket buffer with received data 574 **/ 575 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err, 576 struct sk_buff *skb) 577 { 578 u16 status = (u16)status_err; 579 u8 errors = (u8)(status_err >> 24); 580 581 skb_checksum_none_assert(skb); 582 583 /* Rx checksum disabled */ 584 if (!(adapter->netdev->features & NETIF_F_RXCSUM)) 585 return; 586 587 /* Ignore Checksum bit is set */ 588 if (status & E1000_RXD_STAT_IXSM) 589 return; 590 591 /* TCP/UDP checksum error bit or IP checksum error bit is set */ 592 if (errors & (E1000_RXD_ERR_TCPE | E1000_RXD_ERR_IPE)) { 593 /* let the stack verify checksum errors */ 594 adapter->hw_csum_err++; 595 return; 596 } 597 598 /* TCP/UDP Checksum has not been calculated */ 599 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))) 600 return; 601 602 /* It must be a TCP or UDP packet with a valid checksum */ 603 skb->ip_summed = CHECKSUM_UNNECESSARY; 604 adapter->hw_csum_good++; 605 } 606 607 static void e1000e_update_rdt_wa(struct e1000_ring *rx_ring, unsigned int i) 608 { 609 struct e1000_adapter *adapter = rx_ring->adapter; 610 struct e1000_hw *hw = &adapter->hw; 611 612 __ew32_prepare(hw); 613 writel(i, rx_ring->tail); 614 615 if (unlikely(i != readl(rx_ring->tail))) { 616 u32 rctl = er32(RCTL); 617 618 ew32(RCTL, rctl & ~E1000_RCTL_EN); 619 e_err("ME firmware caused invalid RDT - resetting\n"); 620 schedule_work(&adapter->reset_task); 621 } 622 } 623 624 static void e1000e_update_tdt_wa(struct e1000_ring *tx_ring, unsigned int i) 625 { 626 struct e1000_adapter *adapter = tx_ring->adapter; 627 struct e1000_hw *hw = &adapter->hw; 628 629 __ew32_prepare(hw); 630 writel(i, tx_ring->tail); 631 632 if (unlikely(i != readl(tx_ring->tail))) { 633 u32 tctl = er32(TCTL); 634 635 ew32(TCTL, tctl & ~E1000_TCTL_EN); 636 e_err("ME firmware caused invalid TDT - resetting\n"); 637 schedule_work(&adapter->reset_task); 638 } 639 } 640 641 /** 642 * e1000_alloc_rx_buffers - Replace used receive buffers 643 * @rx_ring: Rx descriptor ring 644 * @cleaned_count: number to reallocate 645 * @gfp: flags for allocation 646 **/ 647 static void e1000_alloc_rx_buffers(struct e1000_ring *rx_ring, 648 int cleaned_count, gfp_t gfp) 649 { 650 struct e1000_adapter *adapter = rx_ring->adapter; 651 struct net_device *netdev = adapter->netdev; 652 struct pci_dev *pdev = adapter->pdev; 653 union e1000_rx_desc_extended *rx_desc; 654 struct e1000_buffer *buffer_info; 655 struct sk_buff *skb; 656 unsigned int i; 657 unsigned int bufsz = adapter->rx_buffer_len; 658 659 i = rx_ring->next_to_use; 660 buffer_info = &rx_ring->buffer_info[i]; 661 662 while (cleaned_count--) { 663 skb = buffer_info->skb; 664 if (skb) { 665 skb_trim(skb, 0); 666 goto map_skb; 667 } 668 669 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp); 670 if (!skb) { 671 /* Better luck next round */ 672 adapter->alloc_rx_buff_failed++; 673 break; 674 } 675 676 buffer_info->skb = skb; 677 map_skb: 678 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, 679 adapter->rx_buffer_len, 680 DMA_FROM_DEVICE); 681 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 682 dev_err(&pdev->dev, "Rx DMA map failed\n"); 683 adapter->rx_dma_failed++; 684 break; 685 } 686 687 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 688 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); 689 690 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) { 691 /* Force memory writes to complete before letting h/w 692 * know there are new descriptors to fetch. (Only 693 * applicable for weak-ordered memory model archs, 694 * such as IA-64). 695 */ 696 wmb(); 697 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 698 e1000e_update_rdt_wa(rx_ring, i); 699 else 700 writel(i, rx_ring->tail); 701 } 702 i++; 703 if (i == rx_ring->count) 704 i = 0; 705 buffer_info = &rx_ring->buffer_info[i]; 706 } 707 708 rx_ring->next_to_use = i; 709 } 710 711 /** 712 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split 713 * @rx_ring: Rx descriptor ring 714 * @cleaned_count: number to reallocate 715 * @gfp: flags for allocation 716 **/ 717 static void e1000_alloc_rx_buffers_ps(struct e1000_ring *rx_ring, 718 int cleaned_count, gfp_t gfp) 719 { 720 struct e1000_adapter *adapter = rx_ring->adapter; 721 struct net_device *netdev = adapter->netdev; 722 struct pci_dev *pdev = adapter->pdev; 723 union e1000_rx_desc_packet_split *rx_desc; 724 struct e1000_buffer *buffer_info; 725 struct e1000_ps_page *ps_page; 726 struct sk_buff *skb; 727 unsigned int i, j; 728 729 i = rx_ring->next_to_use; 730 buffer_info = &rx_ring->buffer_info[i]; 731 732 while (cleaned_count--) { 733 rx_desc = E1000_RX_DESC_PS(*rx_ring, i); 734 735 for (j = 0; j < PS_PAGE_BUFFERS; j++) { 736 ps_page = &buffer_info->ps_pages[j]; 737 if (j >= adapter->rx_ps_pages) { 738 /* all unused desc entries get hw null ptr */ 739 rx_desc->read.buffer_addr[j + 1] = 740 ~cpu_to_le64(0); 741 continue; 742 } 743 if (!ps_page->page) { 744 ps_page->page = alloc_page(gfp); 745 if (!ps_page->page) { 746 adapter->alloc_rx_buff_failed++; 747 goto no_buffers; 748 } 749 ps_page->dma = dma_map_page(&pdev->dev, 750 ps_page->page, 751 0, PAGE_SIZE, 752 DMA_FROM_DEVICE); 753 if (dma_mapping_error(&pdev->dev, 754 ps_page->dma)) { 755 dev_err(&adapter->pdev->dev, 756 "Rx DMA page map failed\n"); 757 adapter->rx_dma_failed++; 758 goto no_buffers; 759 } 760 } 761 /* Refresh the desc even if buffer_addrs 762 * didn't change because each write-back 763 * erases this info. 764 */ 765 rx_desc->read.buffer_addr[j + 1] = 766 cpu_to_le64(ps_page->dma); 767 } 768 769 skb = __netdev_alloc_skb_ip_align(netdev, adapter->rx_ps_bsize0, 770 gfp); 771 772 if (!skb) { 773 adapter->alloc_rx_buff_failed++; 774 break; 775 } 776 777 buffer_info->skb = skb; 778 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, 779 adapter->rx_ps_bsize0, 780 DMA_FROM_DEVICE); 781 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 782 dev_err(&pdev->dev, "Rx DMA map failed\n"); 783 adapter->rx_dma_failed++; 784 /* cleanup skb */ 785 dev_kfree_skb_any(skb); 786 buffer_info->skb = NULL; 787 break; 788 } 789 790 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma); 791 792 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) { 793 /* Force memory writes to complete before letting h/w 794 * know there are new descriptors to fetch. (Only 795 * applicable for weak-ordered memory model archs, 796 * such as IA-64). 797 */ 798 wmb(); 799 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 800 e1000e_update_rdt_wa(rx_ring, i << 1); 801 else 802 writel(i << 1, rx_ring->tail); 803 } 804 805 i++; 806 if (i == rx_ring->count) 807 i = 0; 808 buffer_info = &rx_ring->buffer_info[i]; 809 } 810 811 no_buffers: 812 rx_ring->next_to_use = i; 813 } 814 815 /** 816 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers 817 * @rx_ring: Rx descriptor ring 818 * @cleaned_count: number of buffers to allocate this pass 819 * @gfp: flags for allocation 820 **/ 821 822 static void e1000_alloc_jumbo_rx_buffers(struct e1000_ring *rx_ring, 823 int cleaned_count, gfp_t gfp) 824 { 825 struct e1000_adapter *adapter = rx_ring->adapter; 826 struct net_device *netdev = adapter->netdev; 827 struct pci_dev *pdev = adapter->pdev; 828 union e1000_rx_desc_extended *rx_desc; 829 struct e1000_buffer *buffer_info; 830 struct sk_buff *skb; 831 unsigned int i; 832 unsigned int bufsz = 256 - 16; /* for skb_reserve */ 833 834 i = rx_ring->next_to_use; 835 buffer_info = &rx_ring->buffer_info[i]; 836 837 while (cleaned_count--) { 838 skb = buffer_info->skb; 839 if (skb) { 840 skb_trim(skb, 0); 841 goto check_page; 842 } 843 844 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp); 845 if (unlikely(!skb)) { 846 /* Better luck next round */ 847 adapter->alloc_rx_buff_failed++; 848 break; 849 } 850 851 buffer_info->skb = skb; 852 check_page: 853 /* allocate a new page if necessary */ 854 if (!buffer_info->page) { 855 buffer_info->page = alloc_page(gfp); 856 if (unlikely(!buffer_info->page)) { 857 adapter->alloc_rx_buff_failed++; 858 break; 859 } 860 } 861 862 if (!buffer_info->dma) { 863 buffer_info->dma = dma_map_page(&pdev->dev, 864 buffer_info->page, 0, 865 PAGE_SIZE, 866 DMA_FROM_DEVICE); 867 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 868 adapter->alloc_rx_buff_failed++; 869 break; 870 } 871 } 872 873 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 874 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); 875 876 if (unlikely(++i == rx_ring->count)) 877 i = 0; 878 buffer_info = &rx_ring->buffer_info[i]; 879 } 880 881 if (likely(rx_ring->next_to_use != i)) { 882 rx_ring->next_to_use = i; 883 if (unlikely(i-- == 0)) 884 i = (rx_ring->count - 1); 885 886 /* Force memory writes to complete before letting h/w 887 * know there are new descriptors to fetch. (Only 888 * applicable for weak-ordered memory model archs, 889 * such as IA-64). 890 */ 891 wmb(); 892 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 893 e1000e_update_rdt_wa(rx_ring, i); 894 else 895 writel(i, rx_ring->tail); 896 } 897 } 898 899 static inline void e1000_rx_hash(struct net_device *netdev, __le32 rss, 900 struct sk_buff *skb) 901 { 902 if (netdev->features & NETIF_F_RXHASH) 903 skb_set_hash(skb, le32_to_cpu(rss), PKT_HASH_TYPE_L3); 904 } 905 906 /** 907 * e1000_clean_rx_irq - Send received data up the network stack 908 * @rx_ring: Rx descriptor ring 909 * @work_done: output parameter for indicating completed work 910 * @work_to_do: how many packets we can clean 911 * 912 * the return value indicates whether actual cleaning was done, there 913 * is no guarantee that everything was cleaned 914 **/ 915 static bool e1000_clean_rx_irq(struct e1000_ring *rx_ring, int *work_done, 916 int work_to_do) 917 { 918 struct e1000_adapter *adapter = rx_ring->adapter; 919 struct net_device *netdev = adapter->netdev; 920 struct pci_dev *pdev = adapter->pdev; 921 struct e1000_hw *hw = &adapter->hw; 922 union e1000_rx_desc_extended *rx_desc, *next_rxd; 923 struct e1000_buffer *buffer_info, *next_buffer; 924 u32 length, staterr; 925 unsigned int i; 926 int cleaned_count = 0; 927 bool cleaned = false; 928 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 929 930 i = rx_ring->next_to_clean; 931 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 932 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 933 buffer_info = &rx_ring->buffer_info[i]; 934 935 while (staterr & E1000_RXD_STAT_DD) { 936 struct sk_buff *skb; 937 938 if (*work_done >= work_to_do) 939 break; 940 (*work_done)++; 941 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */ 942 943 skb = buffer_info->skb; 944 buffer_info->skb = NULL; 945 946 prefetch(skb->data - NET_IP_ALIGN); 947 948 i++; 949 if (i == rx_ring->count) 950 i = 0; 951 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i); 952 prefetch(next_rxd); 953 954 next_buffer = &rx_ring->buffer_info[i]; 955 956 cleaned = true; 957 cleaned_count++; 958 dma_unmap_single(&pdev->dev, buffer_info->dma, 959 adapter->rx_buffer_len, DMA_FROM_DEVICE); 960 buffer_info->dma = 0; 961 962 length = le16_to_cpu(rx_desc->wb.upper.length); 963 964 /* !EOP means multiple descriptors were used to store a single 965 * packet, if that's the case we need to toss it. In fact, we 966 * need to toss every packet with the EOP bit clear and the 967 * next frame that _does_ have the EOP bit set, as it is by 968 * definition only a frame fragment 969 */ 970 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) 971 adapter->flags2 |= FLAG2_IS_DISCARDING; 972 973 if (adapter->flags2 & FLAG2_IS_DISCARDING) { 974 /* All receives must fit into a single buffer */ 975 e_dbg("Receive packet consumed multiple buffers\n"); 976 /* recycle */ 977 buffer_info->skb = skb; 978 if (staterr & E1000_RXD_STAT_EOP) 979 adapter->flags2 &= ~FLAG2_IS_DISCARDING; 980 goto next_desc; 981 } 982 983 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) && 984 !(netdev->features & NETIF_F_RXALL))) { 985 /* recycle */ 986 buffer_info->skb = skb; 987 goto next_desc; 988 } 989 990 /* adjust length to remove Ethernet CRC */ 991 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) { 992 /* If configured to store CRC, don't subtract FCS, 993 * but keep the FCS bytes out of the total_rx_bytes 994 * counter 995 */ 996 if (netdev->features & NETIF_F_RXFCS) 997 total_rx_bytes -= 4; 998 else 999 length -= 4; 1000 } 1001 1002 total_rx_bytes += length; 1003 total_rx_packets++; 1004 1005 /* code added for copybreak, this should improve 1006 * performance for small packets with large amounts 1007 * of reassembly being done in the stack 1008 */ 1009 if (length < copybreak) { 1010 struct sk_buff *new_skb = 1011 napi_alloc_skb(&adapter->napi, length); 1012 if (new_skb) { 1013 skb_copy_to_linear_data_offset(new_skb, 1014 -NET_IP_ALIGN, 1015 (skb->data - 1016 NET_IP_ALIGN), 1017 (length + 1018 NET_IP_ALIGN)); 1019 /* save the skb in buffer_info as good */ 1020 buffer_info->skb = skb; 1021 skb = new_skb; 1022 } 1023 /* else just continue with the old one */ 1024 } 1025 /* end copybreak code */ 1026 skb_put(skb, length); 1027 1028 /* Receive Checksum Offload */ 1029 e1000_rx_checksum(adapter, staterr, skb); 1030 1031 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb); 1032 1033 e1000_receive_skb(adapter, netdev, skb, staterr, 1034 rx_desc->wb.upper.vlan); 1035 1036 next_desc: 1037 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF); 1038 1039 /* return some buffers to hardware, one at a time is too slow */ 1040 if (cleaned_count >= E1000_RX_BUFFER_WRITE) { 1041 adapter->alloc_rx_buf(rx_ring, cleaned_count, 1042 GFP_ATOMIC); 1043 cleaned_count = 0; 1044 } 1045 1046 /* use prefetched values */ 1047 rx_desc = next_rxd; 1048 buffer_info = next_buffer; 1049 1050 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 1051 } 1052 rx_ring->next_to_clean = i; 1053 1054 cleaned_count = e1000_desc_unused(rx_ring); 1055 if (cleaned_count) 1056 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC); 1057 1058 adapter->total_rx_bytes += total_rx_bytes; 1059 adapter->total_rx_packets += total_rx_packets; 1060 return cleaned; 1061 } 1062 1063 static void e1000_put_txbuf(struct e1000_ring *tx_ring, 1064 struct e1000_buffer *buffer_info, 1065 bool drop) 1066 { 1067 struct e1000_adapter *adapter = tx_ring->adapter; 1068 1069 if (buffer_info->dma) { 1070 if (buffer_info->mapped_as_page) 1071 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, 1072 buffer_info->length, DMA_TO_DEVICE); 1073 else 1074 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma, 1075 buffer_info->length, DMA_TO_DEVICE); 1076 buffer_info->dma = 0; 1077 } 1078 if (buffer_info->skb) { 1079 if (drop) 1080 dev_kfree_skb_any(buffer_info->skb); 1081 else 1082 dev_consume_skb_any(buffer_info->skb); 1083 buffer_info->skb = NULL; 1084 } 1085 buffer_info->time_stamp = 0; 1086 } 1087 1088 static void e1000_print_hw_hang(struct work_struct *work) 1089 { 1090 struct e1000_adapter *adapter = container_of(work, 1091 struct e1000_adapter, 1092 print_hang_task); 1093 struct net_device *netdev = adapter->netdev; 1094 struct e1000_ring *tx_ring = adapter->tx_ring; 1095 unsigned int i = tx_ring->next_to_clean; 1096 unsigned int eop = tx_ring->buffer_info[i].next_to_watch; 1097 struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop); 1098 struct e1000_hw *hw = &adapter->hw; 1099 u16 phy_status, phy_1000t_status, phy_ext_status; 1100 u16 pci_status; 1101 1102 if (test_bit(__E1000_DOWN, &adapter->state)) 1103 return; 1104 1105 if (!adapter->tx_hang_recheck && (adapter->flags2 & FLAG2_DMA_BURST)) { 1106 /* May be block on write-back, flush and detect again 1107 * flush pending descriptor writebacks to memory 1108 */ 1109 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 1110 /* execute the writes immediately */ 1111 e1e_flush(); 1112 /* Due to rare timing issues, write to TIDV again to ensure 1113 * the write is successful 1114 */ 1115 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 1116 /* execute the writes immediately */ 1117 e1e_flush(); 1118 adapter->tx_hang_recheck = true; 1119 return; 1120 } 1121 adapter->tx_hang_recheck = false; 1122 1123 if (er32(TDH(0)) == er32(TDT(0))) { 1124 e_dbg("false hang detected, ignoring\n"); 1125 return; 1126 } 1127 1128 /* Real hang detected */ 1129 netif_stop_queue(netdev); 1130 1131 e1e_rphy(hw, MII_BMSR, &phy_status); 1132 e1e_rphy(hw, MII_STAT1000, &phy_1000t_status); 1133 e1e_rphy(hw, MII_ESTATUS, &phy_ext_status); 1134 1135 pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status); 1136 1137 /* detected Hardware unit hang */ 1138 e_err("Detected Hardware Unit Hang:\n" 1139 " TDH <%x>\n" 1140 " TDT <%x>\n" 1141 " next_to_use <%x>\n" 1142 " next_to_clean <%x>\n" 1143 "buffer_info[next_to_clean]:\n" 1144 " time_stamp <%lx>\n" 1145 " next_to_watch <%x>\n" 1146 " jiffies <%lx>\n" 1147 " next_to_watch.status <%x>\n" 1148 "MAC Status <%x>\n" 1149 "PHY Status <%x>\n" 1150 "PHY 1000BASE-T Status <%x>\n" 1151 "PHY Extended Status <%x>\n" 1152 "PCI Status <%x>\n", 1153 readl(tx_ring->head), readl(tx_ring->tail), tx_ring->next_to_use, 1154 tx_ring->next_to_clean, tx_ring->buffer_info[eop].time_stamp, 1155 eop, jiffies, eop_desc->upper.fields.status, er32(STATUS), 1156 phy_status, phy_1000t_status, phy_ext_status, pci_status); 1157 1158 e1000e_dump(adapter); 1159 1160 /* Suggest workaround for known h/w issue */ 1161 if ((hw->mac.type == e1000_pchlan) && (er32(CTRL) & E1000_CTRL_TFCE)) 1162 e_err("Try turning off Tx pause (flow control) via ethtool\n"); 1163 } 1164 1165 /** 1166 * e1000e_tx_hwtstamp_work - check for Tx time stamp 1167 * @work: pointer to work struct 1168 * 1169 * This work function polls the TSYNCTXCTL valid bit to determine when a 1170 * timestamp has been taken for the current stored skb. The timestamp must 1171 * be for this skb because only one such packet is allowed in the queue. 1172 */ 1173 static void e1000e_tx_hwtstamp_work(struct work_struct *work) 1174 { 1175 struct e1000_adapter *adapter = container_of(work, struct e1000_adapter, 1176 tx_hwtstamp_work); 1177 struct e1000_hw *hw = &adapter->hw; 1178 1179 if (er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_VALID) { 1180 struct sk_buff *skb = adapter->tx_hwtstamp_skb; 1181 struct skb_shared_hwtstamps shhwtstamps; 1182 u64 txstmp; 1183 1184 txstmp = er32(TXSTMPL); 1185 txstmp |= (u64)er32(TXSTMPH) << 32; 1186 1187 e1000e_systim_to_hwtstamp(adapter, &shhwtstamps, txstmp); 1188 1189 /* Clear the global tx_hwtstamp_skb pointer and force writes 1190 * prior to notifying the stack of a Tx timestamp. 1191 */ 1192 adapter->tx_hwtstamp_skb = NULL; 1193 wmb(); /* force write prior to skb_tstamp_tx */ 1194 1195 skb_tstamp_tx(skb, &shhwtstamps); 1196 dev_consume_skb_any(skb); 1197 } else if (time_after(jiffies, adapter->tx_hwtstamp_start 1198 + adapter->tx_timeout_factor * HZ)) { 1199 dev_kfree_skb_any(adapter->tx_hwtstamp_skb); 1200 adapter->tx_hwtstamp_skb = NULL; 1201 adapter->tx_hwtstamp_timeouts++; 1202 e_warn("clearing Tx timestamp hang\n"); 1203 } else { 1204 /* reschedule to check later */ 1205 schedule_work(&adapter->tx_hwtstamp_work); 1206 } 1207 } 1208 1209 /** 1210 * e1000_clean_tx_irq - Reclaim resources after transmit completes 1211 * @tx_ring: Tx descriptor ring 1212 * 1213 * the return value indicates whether actual cleaning was done, there 1214 * is no guarantee that everything was cleaned 1215 **/ 1216 static bool e1000_clean_tx_irq(struct e1000_ring *tx_ring) 1217 { 1218 struct e1000_adapter *adapter = tx_ring->adapter; 1219 struct net_device *netdev = adapter->netdev; 1220 struct e1000_hw *hw = &adapter->hw; 1221 struct e1000_tx_desc *tx_desc, *eop_desc; 1222 struct e1000_buffer *buffer_info; 1223 unsigned int i, eop; 1224 unsigned int count = 0; 1225 unsigned int total_tx_bytes = 0, total_tx_packets = 0; 1226 unsigned int bytes_compl = 0, pkts_compl = 0; 1227 1228 i = tx_ring->next_to_clean; 1229 eop = tx_ring->buffer_info[i].next_to_watch; 1230 eop_desc = E1000_TX_DESC(*tx_ring, eop); 1231 1232 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) && 1233 (count < tx_ring->count)) { 1234 bool cleaned = false; 1235 1236 dma_rmb(); /* read buffer_info after eop_desc */ 1237 for (; !cleaned; count++) { 1238 tx_desc = E1000_TX_DESC(*tx_ring, i); 1239 buffer_info = &tx_ring->buffer_info[i]; 1240 cleaned = (i == eop); 1241 1242 if (cleaned) { 1243 total_tx_packets += buffer_info->segs; 1244 total_tx_bytes += buffer_info->bytecount; 1245 if (buffer_info->skb) { 1246 bytes_compl += buffer_info->skb->len; 1247 pkts_compl++; 1248 } 1249 } 1250 1251 e1000_put_txbuf(tx_ring, buffer_info, false); 1252 tx_desc->upper.data = 0; 1253 1254 i++; 1255 if (i == tx_ring->count) 1256 i = 0; 1257 } 1258 1259 if (i == tx_ring->next_to_use) 1260 break; 1261 eop = tx_ring->buffer_info[i].next_to_watch; 1262 eop_desc = E1000_TX_DESC(*tx_ring, eop); 1263 } 1264 1265 tx_ring->next_to_clean = i; 1266 1267 netdev_completed_queue(netdev, pkts_compl, bytes_compl); 1268 1269 #define TX_WAKE_THRESHOLD 32 1270 if (count && netif_carrier_ok(netdev) && 1271 e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) { 1272 /* Make sure that anybody stopping the queue after this 1273 * sees the new next_to_clean. 1274 */ 1275 smp_mb(); 1276 1277 if (netif_queue_stopped(netdev) && 1278 !(test_bit(__E1000_DOWN, &adapter->state))) { 1279 netif_wake_queue(netdev); 1280 ++adapter->restart_queue; 1281 } 1282 } 1283 1284 if (adapter->detect_tx_hung) { 1285 /* Detect a transmit hang in hardware, this serializes the 1286 * check with the clearing of time_stamp and movement of i 1287 */ 1288 adapter->detect_tx_hung = false; 1289 if (tx_ring->buffer_info[i].time_stamp && 1290 time_after(jiffies, tx_ring->buffer_info[i].time_stamp 1291 + (adapter->tx_timeout_factor * HZ)) && 1292 !(er32(STATUS) & E1000_STATUS_TXOFF)) 1293 schedule_work(&adapter->print_hang_task); 1294 else 1295 adapter->tx_hang_recheck = false; 1296 } 1297 adapter->total_tx_bytes += total_tx_bytes; 1298 adapter->total_tx_packets += total_tx_packets; 1299 return count < tx_ring->count; 1300 } 1301 1302 /** 1303 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split 1304 * @rx_ring: Rx descriptor ring 1305 * @work_done: output parameter for indicating completed work 1306 * @work_to_do: how many packets we can clean 1307 * 1308 * the return value indicates whether actual cleaning was done, there 1309 * is no guarantee that everything was cleaned 1310 **/ 1311 static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done, 1312 int work_to_do) 1313 { 1314 struct e1000_adapter *adapter = rx_ring->adapter; 1315 struct e1000_hw *hw = &adapter->hw; 1316 union e1000_rx_desc_packet_split *rx_desc, *next_rxd; 1317 struct net_device *netdev = adapter->netdev; 1318 struct pci_dev *pdev = adapter->pdev; 1319 struct e1000_buffer *buffer_info, *next_buffer; 1320 struct e1000_ps_page *ps_page; 1321 struct sk_buff *skb; 1322 unsigned int i, j; 1323 u32 length, staterr; 1324 int cleaned_count = 0; 1325 bool cleaned = false; 1326 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 1327 1328 i = rx_ring->next_to_clean; 1329 rx_desc = E1000_RX_DESC_PS(*rx_ring, i); 1330 staterr = le32_to_cpu(rx_desc->wb.middle.status_error); 1331 buffer_info = &rx_ring->buffer_info[i]; 1332 1333 while (staterr & E1000_RXD_STAT_DD) { 1334 if (*work_done >= work_to_do) 1335 break; 1336 (*work_done)++; 1337 skb = buffer_info->skb; 1338 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */ 1339 1340 /* in the packet split case this is header only */ 1341 prefetch(skb->data - NET_IP_ALIGN); 1342 1343 i++; 1344 if (i == rx_ring->count) 1345 i = 0; 1346 next_rxd = E1000_RX_DESC_PS(*rx_ring, i); 1347 prefetch(next_rxd); 1348 1349 next_buffer = &rx_ring->buffer_info[i]; 1350 1351 cleaned = true; 1352 cleaned_count++; 1353 dma_unmap_single(&pdev->dev, buffer_info->dma, 1354 adapter->rx_ps_bsize0, DMA_FROM_DEVICE); 1355 buffer_info->dma = 0; 1356 1357 /* see !EOP comment in other Rx routine */ 1358 if (!(staterr & E1000_RXD_STAT_EOP)) 1359 adapter->flags2 |= FLAG2_IS_DISCARDING; 1360 1361 if (adapter->flags2 & FLAG2_IS_DISCARDING) { 1362 e_dbg("Packet Split buffers didn't pick up the full packet\n"); 1363 dev_kfree_skb_irq(skb); 1364 if (staterr & E1000_RXD_STAT_EOP) 1365 adapter->flags2 &= ~FLAG2_IS_DISCARDING; 1366 goto next_desc; 1367 } 1368 1369 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) && 1370 !(netdev->features & NETIF_F_RXALL))) { 1371 dev_kfree_skb_irq(skb); 1372 goto next_desc; 1373 } 1374 1375 length = le16_to_cpu(rx_desc->wb.middle.length0); 1376 1377 if (!length) { 1378 e_dbg("Last part of the packet spanning multiple descriptors\n"); 1379 dev_kfree_skb_irq(skb); 1380 goto next_desc; 1381 } 1382 1383 /* Good Receive */ 1384 skb_put(skb, length); 1385 1386 { 1387 /* this looks ugly, but it seems compiler issues make 1388 * it more efficient than reusing j 1389 */ 1390 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]); 1391 1392 /* page alloc/put takes too long and effects small 1393 * packet throughput, so unsplit small packets and 1394 * save the alloc/put 1395 */ 1396 if (l1 && (l1 <= copybreak) && 1397 ((length + l1) <= adapter->rx_ps_bsize0)) { 1398 ps_page = &buffer_info->ps_pages[0]; 1399 1400 dma_sync_single_for_cpu(&pdev->dev, 1401 ps_page->dma, 1402 PAGE_SIZE, 1403 DMA_FROM_DEVICE); 1404 memcpy(skb_tail_pointer(skb), 1405 page_address(ps_page->page), l1); 1406 dma_sync_single_for_device(&pdev->dev, 1407 ps_page->dma, 1408 PAGE_SIZE, 1409 DMA_FROM_DEVICE); 1410 1411 /* remove the CRC */ 1412 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) { 1413 if (!(netdev->features & NETIF_F_RXFCS)) 1414 l1 -= 4; 1415 } 1416 1417 skb_put(skb, l1); 1418 goto copydone; 1419 } /* if */ 1420 } 1421 1422 for (j = 0; j < PS_PAGE_BUFFERS; j++) { 1423 length = le16_to_cpu(rx_desc->wb.upper.length[j]); 1424 if (!length) 1425 break; 1426 1427 ps_page = &buffer_info->ps_pages[j]; 1428 dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE, 1429 DMA_FROM_DEVICE); 1430 ps_page->dma = 0; 1431 skb_fill_page_desc(skb, j, ps_page->page, 0, length); 1432 ps_page->page = NULL; 1433 skb->len += length; 1434 skb->data_len += length; 1435 skb->truesize += PAGE_SIZE; 1436 } 1437 1438 /* strip the ethernet crc, problem is we're using pages now so 1439 * this whole operation can get a little cpu intensive 1440 */ 1441 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) { 1442 if (!(netdev->features & NETIF_F_RXFCS)) 1443 pskb_trim(skb, skb->len - 4); 1444 } 1445 1446 copydone: 1447 total_rx_bytes += skb->len; 1448 total_rx_packets++; 1449 1450 e1000_rx_checksum(adapter, staterr, skb); 1451 1452 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb); 1453 1454 if (rx_desc->wb.upper.header_status & 1455 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)) 1456 adapter->rx_hdr_split++; 1457 1458 e1000_receive_skb(adapter, netdev, skb, staterr, 1459 rx_desc->wb.middle.vlan); 1460 1461 next_desc: 1462 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF); 1463 buffer_info->skb = NULL; 1464 1465 /* return some buffers to hardware, one at a time is too slow */ 1466 if (cleaned_count >= E1000_RX_BUFFER_WRITE) { 1467 adapter->alloc_rx_buf(rx_ring, cleaned_count, 1468 GFP_ATOMIC); 1469 cleaned_count = 0; 1470 } 1471 1472 /* use prefetched values */ 1473 rx_desc = next_rxd; 1474 buffer_info = next_buffer; 1475 1476 staterr = le32_to_cpu(rx_desc->wb.middle.status_error); 1477 } 1478 rx_ring->next_to_clean = i; 1479 1480 cleaned_count = e1000_desc_unused(rx_ring); 1481 if (cleaned_count) 1482 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC); 1483 1484 adapter->total_rx_bytes += total_rx_bytes; 1485 adapter->total_rx_packets += total_rx_packets; 1486 return cleaned; 1487 } 1488 1489 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb, 1490 u16 length) 1491 { 1492 bi->page = NULL; 1493 skb->len += length; 1494 skb->data_len += length; 1495 skb->truesize += PAGE_SIZE; 1496 } 1497 1498 /** 1499 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy 1500 * @rx_ring: Rx descriptor ring 1501 * @work_done: output parameter for indicating completed work 1502 * @work_to_do: how many packets we can clean 1503 * 1504 * the return value indicates whether actual cleaning was done, there 1505 * is no guarantee that everything was cleaned 1506 **/ 1507 static bool e1000_clean_jumbo_rx_irq(struct e1000_ring *rx_ring, int *work_done, 1508 int work_to_do) 1509 { 1510 struct e1000_adapter *adapter = rx_ring->adapter; 1511 struct net_device *netdev = adapter->netdev; 1512 struct pci_dev *pdev = adapter->pdev; 1513 union e1000_rx_desc_extended *rx_desc, *next_rxd; 1514 struct e1000_buffer *buffer_info, *next_buffer; 1515 u32 length, staterr; 1516 unsigned int i; 1517 int cleaned_count = 0; 1518 bool cleaned = false; 1519 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 1520 struct skb_shared_info *shinfo; 1521 1522 i = rx_ring->next_to_clean; 1523 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 1524 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 1525 buffer_info = &rx_ring->buffer_info[i]; 1526 1527 while (staterr & E1000_RXD_STAT_DD) { 1528 struct sk_buff *skb; 1529 1530 if (*work_done >= work_to_do) 1531 break; 1532 (*work_done)++; 1533 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */ 1534 1535 skb = buffer_info->skb; 1536 buffer_info->skb = NULL; 1537 1538 ++i; 1539 if (i == rx_ring->count) 1540 i = 0; 1541 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i); 1542 prefetch(next_rxd); 1543 1544 next_buffer = &rx_ring->buffer_info[i]; 1545 1546 cleaned = true; 1547 cleaned_count++; 1548 dma_unmap_page(&pdev->dev, buffer_info->dma, PAGE_SIZE, 1549 DMA_FROM_DEVICE); 1550 buffer_info->dma = 0; 1551 1552 length = le16_to_cpu(rx_desc->wb.upper.length); 1553 1554 /* errors is only valid for DD + EOP descriptors */ 1555 if (unlikely((staterr & E1000_RXD_STAT_EOP) && 1556 ((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) && 1557 !(netdev->features & NETIF_F_RXALL)))) { 1558 /* recycle both page and skb */ 1559 buffer_info->skb = skb; 1560 /* an error means any chain goes out the window too */ 1561 if (rx_ring->rx_skb_top) 1562 dev_kfree_skb_irq(rx_ring->rx_skb_top); 1563 rx_ring->rx_skb_top = NULL; 1564 goto next_desc; 1565 } 1566 #define rxtop (rx_ring->rx_skb_top) 1567 if (!(staterr & E1000_RXD_STAT_EOP)) { 1568 /* this descriptor is only the beginning (or middle) */ 1569 if (!rxtop) { 1570 /* this is the beginning of a chain */ 1571 rxtop = skb; 1572 skb_fill_page_desc(rxtop, 0, buffer_info->page, 1573 0, length); 1574 } else { 1575 /* this is the middle of a chain */ 1576 shinfo = skb_shinfo(rxtop); 1577 skb_fill_page_desc(rxtop, shinfo->nr_frags, 1578 buffer_info->page, 0, 1579 length); 1580 /* re-use the skb, only consumed the page */ 1581 buffer_info->skb = skb; 1582 } 1583 e1000_consume_page(buffer_info, rxtop, length); 1584 goto next_desc; 1585 } else { 1586 if (rxtop) { 1587 /* end of the chain */ 1588 shinfo = skb_shinfo(rxtop); 1589 skb_fill_page_desc(rxtop, shinfo->nr_frags, 1590 buffer_info->page, 0, 1591 length); 1592 /* re-use the current skb, we only consumed the 1593 * page 1594 */ 1595 buffer_info->skb = skb; 1596 skb = rxtop; 1597 rxtop = NULL; 1598 e1000_consume_page(buffer_info, skb, length); 1599 } else { 1600 /* no chain, got EOP, this buf is the packet 1601 * copybreak to save the put_page/alloc_page 1602 */ 1603 if (length <= copybreak && 1604 skb_tailroom(skb) >= length) { 1605 memcpy(skb_tail_pointer(skb), 1606 page_address(buffer_info->page), 1607 length); 1608 /* re-use the page, so don't erase 1609 * buffer_info->page 1610 */ 1611 skb_put(skb, length); 1612 } else { 1613 skb_fill_page_desc(skb, 0, 1614 buffer_info->page, 0, 1615 length); 1616 e1000_consume_page(buffer_info, skb, 1617 length); 1618 } 1619 } 1620 } 1621 1622 /* Receive Checksum Offload */ 1623 e1000_rx_checksum(adapter, staterr, skb); 1624 1625 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb); 1626 1627 /* probably a little skewed due to removing CRC */ 1628 total_rx_bytes += skb->len; 1629 total_rx_packets++; 1630 1631 /* eth type trans needs skb->data to point to something */ 1632 if (!pskb_may_pull(skb, ETH_HLEN)) { 1633 e_err("pskb_may_pull failed.\n"); 1634 dev_kfree_skb_irq(skb); 1635 goto next_desc; 1636 } 1637 1638 e1000_receive_skb(adapter, netdev, skb, staterr, 1639 rx_desc->wb.upper.vlan); 1640 1641 next_desc: 1642 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF); 1643 1644 /* return some buffers to hardware, one at a time is too slow */ 1645 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { 1646 adapter->alloc_rx_buf(rx_ring, cleaned_count, 1647 GFP_ATOMIC); 1648 cleaned_count = 0; 1649 } 1650 1651 /* use prefetched values */ 1652 rx_desc = next_rxd; 1653 buffer_info = next_buffer; 1654 1655 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 1656 } 1657 rx_ring->next_to_clean = i; 1658 1659 cleaned_count = e1000_desc_unused(rx_ring); 1660 if (cleaned_count) 1661 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC); 1662 1663 adapter->total_rx_bytes += total_rx_bytes; 1664 adapter->total_rx_packets += total_rx_packets; 1665 return cleaned; 1666 } 1667 1668 /** 1669 * e1000_clean_rx_ring - Free Rx Buffers per Queue 1670 * @rx_ring: Rx descriptor ring 1671 **/ 1672 static void e1000_clean_rx_ring(struct e1000_ring *rx_ring) 1673 { 1674 struct e1000_adapter *adapter = rx_ring->adapter; 1675 struct e1000_buffer *buffer_info; 1676 struct e1000_ps_page *ps_page; 1677 struct pci_dev *pdev = adapter->pdev; 1678 unsigned int i, j; 1679 1680 /* Free all the Rx ring sk_buffs */ 1681 for (i = 0; i < rx_ring->count; i++) { 1682 buffer_info = &rx_ring->buffer_info[i]; 1683 if (buffer_info->dma) { 1684 if (adapter->clean_rx == e1000_clean_rx_irq) 1685 dma_unmap_single(&pdev->dev, buffer_info->dma, 1686 adapter->rx_buffer_len, 1687 DMA_FROM_DEVICE); 1688 else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq) 1689 dma_unmap_page(&pdev->dev, buffer_info->dma, 1690 PAGE_SIZE, DMA_FROM_DEVICE); 1691 else if (adapter->clean_rx == e1000_clean_rx_irq_ps) 1692 dma_unmap_single(&pdev->dev, buffer_info->dma, 1693 adapter->rx_ps_bsize0, 1694 DMA_FROM_DEVICE); 1695 buffer_info->dma = 0; 1696 } 1697 1698 if (buffer_info->page) { 1699 put_page(buffer_info->page); 1700 buffer_info->page = NULL; 1701 } 1702 1703 if (buffer_info->skb) { 1704 dev_kfree_skb(buffer_info->skb); 1705 buffer_info->skb = NULL; 1706 } 1707 1708 for (j = 0; j < PS_PAGE_BUFFERS; j++) { 1709 ps_page = &buffer_info->ps_pages[j]; 1710 if (!ps_page->page) 1711 break; 1712 dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE, 1713 DMA_FROM_DEVICE); 1714 ps_page->dma = 0; 1715 put_page(ps_page->page); 1716 ps_page->page = NULL; 1717 } 1718 } 1719 1720 /* there also may be some cached data from a chained receive */ 1721 if (rx_ring->rx_skb_top) { 1722 dev_kfree_skb(rx_ring->rx_skb_top); 1723 rx_ring->rx_skb_top = NULL; 1724 } 1725 1726 /* Zero out the descriptor ring */ 1727 memset(rx_ring->desc, 0, rx_ring->size); 1728 1729 rx_ring->next_to_clean = 0; 1730 rx_ring->next_to_use = 0; 1731 adapter->flags2 &= ~FLAG2_IS_DISCARDING; 1732 } 1733 1734 static void e1000e_downshift_workaround(struct work_struct *work) 1735 { 1736 struct e1000_adapter *adapter = container_of(work, 1737 struct e1000_adapter, 1738 downshift_task); 1739 1740 if (test_bit(__E1000_DOWN, &adapter->state)) 1741 return; 1742 1743 e1000e_gig_downshift_workaround_ich8lan(&adapter->hw); 1744 } 1745 1746 /** 1747 * e1000_intr_msi - Interrupt Handler 1748 * @irq: interrupt number 1749 * @data: pointer to a network interface device structure 1750 **/ 1751 static irqreturn_t e1000_intr_msi(int __always_unused irq, void *data) 1752 { 1753 struct net_device *netdev = data; 1754 struct e1000_adapter *adapter = netdev_priv(netdev); 1755 struct e1000_hw *hw = &adapter->hw; 1756 u32 icr = er32(ICR); 1757 1758 /* read ICR disables interrupts using IAM */ 1759 if (icr & E1000_ICR_LSC) { 1760 hw->mac.get_link_status = true; 1761 /* ICH8 workaround-- Call gig speed drop workaround on cable 1762 * disconnect (LSC) before accessing any PHY registers 1763 */ 1764 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) && 1765 (!(er32(STATUS) & E1000_STATUS_LU))) 1766 schedule_work(&adapter->downshift_task); 1767 1768 /* 80003ES2LAN workaround-- For packet buffer work-around on 1769 * link down event; disable receives here in the ISR and reset 1770 * adapter in watchdog 1771 */ 1772 if (netif_carrier_ok(netdev) && 1773 adapter->flags & FLAG_RX_NEEDS_RESTART) { 1774 /* disable receives */ 1775 u32 rctl = er32(RCTL); 1776 1777 ew32(RCTL, rctl & ~E1000_RCTL_EN); 1778 adapter->flags |= FLAG_RESTART_NOW; 1779 } 1780 /* guard against interrupt when we're going down */ 1781 if (!test_bit(__E1000_DOWN, &adapter->state)) 1782 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1783 } 1784 1785 /* Reset on uncorrectable ECC error */ 1786 if ((icr & E1000_ICR_ECCER) && (hw->mac.type >= e1000_pch_lpt)) { 1787 u32 pbeccsts = er32(PBECCSTS); 1788 1789 adapter->corr_errors += 1790 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK; 1791 adapter->uncorr_errors += 1792 FIELD_GET(E1000_PBECCSTS_UNCORR_ERR_CNT_MASK, pbeccsts); 1793 1794 /* Do the reset outside of interrupt context */ 1795 schedule_work(&adapter->reset_task); 1796 1797 /* return immediately since reset is imminent */ 1798 return IRQ_HANDLED; 1799 } 1800 1801 if (napi_schedule_prep(&adapter->napi)) { 1802 adapter->total_tx_bytes = 0; 1803 adapter->total_tx_packets = 0; 1804 adapter->total_rx_bytes = 0; 1805 adapter->total_rx_packets = 0; 1806 __napi_schedule(&adapter->napi); 1807 } 1808 1809 return IRQ_HANDLED; 1810 } 1811 1812 /** 1813 * e1000_intr - Interrupt Handler 1814 * @irq: interrupt number 1815 * @data: pointer to a network interface device structure 1816 **/ 1817 static irqreturn_t e1000_intr(int __always_unused irq, void *data) 1818 { 1819 struct net_device *netdev = data; 1820 struct e1000_adapter *adapter = netdev_priv(netdev); 1821 struct e1000_hw *hw = &adapter->hw; 1822 u32 rctl, icr = er32(ICR); 1823 1824 if (!icr || test_bit(__E1000_DOWN, &adapter->state)) 1825 return IRQ_NONE; /* Not our interrupt */ 1826 1827 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is 1828 * not set, then the adapter didn't send an interrupt 1829 */ 1830 if (!(icr & E1000_ICR_INT_ASSERTED)) 1831 return IRQ_NONE; 1832 1833 /* Interrupt Auto-Mask...upon reading ICR, 1834 * interrupts are masked. No need for the 1835 * IMC write 1836 */ 1837 1838 if (icr & E1000_ICR_LSC) { 1839 hw->mac.get_link_status = true; 1840 /* ICH8 workaround-- Call gig speed drop workaround on cable 1841 * disconnect (LSC) before accessing any PHY registers 1842 */ 1843 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) && 1844 (!(er32(STATUS) & E1000_STATUS_LU))) 1845 schedule_work(&adapter->downshift_task); 1846 1847 /* 80003ES2LAN workaround-- 1848 * For packet buffer work-around on link down event; 1849 * disable receives here in the ISR and 1850 * reset adapter in watchdog 1851 */ 1852 if (netif_carrier_ok(netdev) && 1853 (adapter->flags & FLAG_RX_NEEDS_RESTART)) { 1854 /* disable receives */ 1855 rctl = er32(RCTL); 1856 ew32(RCTL, rctl & ~E1000_RCTL_EN); 1857 adapter->flags |= FLAG_RESTART_NOW; 1858 } 1859 /* guard against interrupt when we're going down */ 1860 if (!test_bit(__E1000_DOWN, &adapter->state)) 1861 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1862 } 1863 1864 /* Reset on uncorrectable ECC error */ 1865 if ((icr & E1000_ICR_ECCER) && (hw->mac.type >= e1000_pch_lpt)) { 1866 u32 pbeccsts = er32(PBECCSTS); 1867 1868 adapter->corr_errors += 1869 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK; 1870 adapter->uncorr_errors += 1871 FIELD_GET(E1000_PBECCSTS_UNCORR_ERR_CNT_MASK, pbeccsts); 1872 1873 /* Do the reset outside of interrupt context */ 1874 schedule_work(&adapter->reset_task); 1875 1876 /* return immediately since reset is imminent */ 1877 return IRQ_HANDLED; 1878 } 1879 1880 if (napi_schedule_prep(&adapter->napi)) { 1881 adapter->total_tx_bytes = 0; 1882 adapter->total_tx_packets = 0; 1883 adapter->total_rx_bytes = 0; 1884 adapter->total_rx_packets = 0; 1885 __napi_schedule(&adapter->napi); 1886 } 1887 1888 return IRQ_HANDLED; 1889 } 1890 1891 static irqreturn_t e1000_msix_other(int __always_unused irq, void *data) 1892 { 1893 struct net_device *netdev = data; 1894 struct e1000_adapter *adapter = netdev_priv(netdev); 1895 struct e1000_hw *hw = &adapter->hw; 1896 u32 icr = er32(ICR); 1897 1898 if (icr & adapter->eiac_mask) 1899 ew32(ICS, (icr & adapter->eiac_mask)); 1900 1901 if (icr & E1000_ICR_LSC) { 1902 hw->mac.get_link_status = true; 1903 /* guard against interrupt when we're going down */ 1904 if (!test_bit(__E1000_DOWN, &adapter->state)) 1905 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1906 } 1907 1908 if (!test_bit(__E1000_DOWN, &adapter->state)) 1909 ew32(IMS, E1000_IMS_OTHER | IMS_OTHER_MASK); 1910 1911 return IRQ_HANDLED; 1912 } 1913 1914 static irqreturn_t e1000_intr_msix_tx(int __always_unused irq, void *data) 1915 { 1916 struct net_device *netdev = data; 1917 struct e1000_adapter *adapter = netdev_priv(netdev); 1918 struct e1000_hw *hw = &adapter->hw; 1919 struct e1000_ring *tx_ring = adapter->tx_ring; 1920 1921 adapter->total_tx_bytes = 0; 1922 adapter->total_tx_packets = 0; 1923 1924 if (!e1000_clean_tx_irq(tx_ring)) 1925 /* Ring was not completely cleaned, so fire another interrupt */ 1926 ew32(ICS, tx_ring->ims_val); 1927 1928 if (!test_bit(__E1000_DOWN, &adapter->state)) 1929 ew32(IMS, adapter->tx_ring->ims_val); 1930 1931 return IRQ_HANDLED; 1932 } 1933 1934 static irqreturn_t e1000_intr_msix_rx(int __always_unused irq, void *data) 1935 { 1936 struct net_device *netdev = data; 1937 struct e1000_adapter *adapter = netdev_priv(netdev); 1938 struct e1000_ring *rx_ring = adapter->rx_ring; 1939 1940 /* Write the ITR value calculated at the end of the 1941 * previous interrupt. 1942 */ 1943 if (rx_ring->set_itr) { 1944 u32 itr = rx_ring->itr_val ? 1945 1000000000 / (rx_ring->itr_val * 256) : 0; 1946 1947 writel(itr, rx_ring->itr_register); 1948 rx_ring->set_itr = 0; 1949 } 1950 1951 if (napi_schedule_prep(&adapter->napi)) { 1952 adapter->total_rx_bytes = 0; 1953 adapter->total_rx_packets = 0; 1954 __napi_schedule(&adapter->napi); 1955 } 1956 return IRQ_HANDLED; 1957 } 1958 1959 /** 1960 * e1000_configure_msix - Configure MSI-X hardware 1961 * @adapter: board private structure 1962 * 1963 * e1000_configure_msix sets up the hardware to properly 1964 * generate MSI-X interrupts. 1965 **/ 1966 static void e1000_configure_msix(struct e1000_adapter *adapter) 1967 { 1968 struct e1000_hw *hw = &adapter->hw; 1969 struct e1000_ring *rx_ring = adapter->rx_ring; 1970 struct e1000_ring *tx_ring = adapter->tx_ring; 1971 int vector = 0; 1972 u32 ctrl_ext, ivar = 0; 1973 1974 adapter->eiac_mask = 0; 1975 1976 /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */ 1977 if (hw->mac.type == e1000_82574) { 1978 u32 rfctl = er32(RFCTL); 1979 1980 rfctl |= E1000_RFCTL_ACK_DIS; 1981 ew32(RFCTL, rfctl); 1982 } 1983 1984 /* Configure Rx vector */ 1985 rx_ring->ims_val = E1000_IMS_RXQ0; 1986 adapter->eiac_mask |= rx_ring->ims_val; 1987 if (rx_ring->itr_val) 1988 writel(1000000000 / (rx_ring->itr_val * 256), 1989 rx_ring->itr_register); 1990 else 1991 writel(1, rx_ring->itr_register); 1992 ivar = E1000_IVAR_INT_ALLOC_VALID | vector; 1993 1994 /* Configure Tx vector */ 1995 tx_ring->ims_val = E1000_IMS_TXQ0; 1996 vector++; 1997 if (tx_ring->itr_val) 1998 writel(1000000000 / (tx_ring->itr_val * 256), 1999 tx_ring->itr_register); 2000 else 2001 writel(1, tx_ring->itr_register); 2002 adapter->eiac_mask |= tx_ring->ims_val; 2003 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8); 2004 2005 /* set vector for Other Causes, e.g. link changes */ 2006 vector++; 2007 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16); 2008 if (rx_ring->itr_val) 2009 writel(1000000000 / (rx_ring->itr_val * 256), 2010 hw->hw_addr + E1000_EITR_82574(vector)); 2011 else 2012 writel(1, hw->hw_addr + E1000_EITR_82574(vector)); 2013 2014 /* Cause Tx interrupts on every write back */ 2015 ivar |= BIT(31); 2016 2017 ew32(IVAR, ivar); 2018 2019 /* enable MSI-X PBA support */ 2020 ctrl_ext = er32(CTRL_EXT) & ~E1000_CTRL_EXT_IAME; 2021 ctrl_ext |= E1000_CTRL_EXT_PBA_CLR | E1000_CTRL_EXT_EIAME; 2022 ew32(CTRL_EXT, ctrl_ext); 2023 e1e_flush(); 2024 } 2025 2026 void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter) 2027 { 2028 if (adapter->msix_entries) { 2029 pci_disable_msix(adapter->pdev); 2030 kfree(adapter->msix_entries); 2031 adapter->msix_entries = NULL; 2032 } else if (adapter->flags & FLAG_MSI_ENABLED) { 2033 pci_disable_msi(adapter->pdev); 2034 adapter->flags &= ~FLAG_MSI_ENABLED; 2035 } 2036 } 2037 2038 /** 2039 * e1000e_set_interrupt_capability - set MSI or MSI-X if supported 2040 * @adapter: board private structure 2041 * 2042 * Attempt to configure interrupts using the best available 2043 * capabilities of the hardware and kernel. 2044 **/ 2045 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter) 2046 { 2047 int err; 2048 int i; 2049 2050 switch (adapter->int_mode) { 2051 case E1000E_INT_MODE_MSIX: 2052 if (adapter->flags & FLAG_HAS_MSIX) { 2053 adapter->num_vectors = 3; /* RxQ0, TxQ0 and other */ 2054 adapter->msix_entries = kzalloc_objs(struct msix_entry, 2055 adapter->num_vectors); 2056 if (adapter->msix_entries) { 2057 struct e1000_adapter *a = adapter; 2058 2059 for (i = 0; i < adapter->num_vectors; i++) 2060 adapter->msix_entries[i].entry = i; 2061 2062 err = pci_enable_msix_range(a->pdev, 2063 a->msix_entries, 2064 a->num_vectors, 2065 a->num_vectors); 2066 if (err > 0) 2067 return; 2068 } 2069 /* MSI-X failed, so fall through and try MSI */ 2070 e_err("Failed to initialize MSI-X interrupts. Falling back to MSI interrupts.\n"); 2071 e1000e_reset_interrupt_capability(adapter); 2072 } 2073 adapter->int_mode = E1000E_INT_MODE_MSI; 2074 fallthrough; 2075 case E1000E_INT_MODE_MSI: 2076 if (!pci_enable_msi(adapter->pdev)) { 2077 adapter->flags |= FLAG_MSI_ENABLED; 2078 } else { 2079 adapter->int_mode = E1000E_INT_MODE_LEGACY; 2080 e_err("Failed to initialize MSI interrupts. Falling back to legacy interrupts.\n"); 2081 } 2082 fallthrough; 2083 case E1000E_INT_MODE_LEGACY: 2084 /* Don't do anything; this is the system default */ 2085 break; 2086 } 2087 2088 /* store the number of vectors being used */ 2089 adapter->num_vectors = 1; 2090 } 2091 2092 /** 2093 * e1000_request_msix - Initialize MSI-X interrupts 2094 * @adapter: board private structure 2095 * 2096 * e1000_request_msix allocates MSI-X vectors and requests interrupts from the 2097 * kernel. 2098 **/ 2099 static int e1000_request_msix(struct e1000_adapter *adapter) 2100 { 2101 struct net_device *netdev = adapter->netdev; 2102 int err = 0, vector = 0; 2103 2104 if (strlen(netdev->name) < (IFNAMSIZ - 5)) 2105 snprintf(adapter->rx_ring->name, 2106 sizeof(adapter->rx_ring->name) - 1, 2107 "%.14s-rx-0", netdev->name); 2108 else 2109 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ); 2110 err = request_irq(adapter->msix_entries[vector].vector, 2111 e1000_intr_msix_rx, 0, adapter->rx_ring->name, 2112 netdev); 2113 if (err) 2114 return err; 2115 adapter->rx_ring->itr_register = adapter->hw.hw_addr + 2116 E1000_EITR_82574(vector); 2117 adapter->rx_ring->itr_val = adapter->itr; 2118 vector++; 2119 2120 if (strlen(netdev->name) < (IFNAMSIZ - 5)) 2121 snprintf(adapter->tx_ring->name, 2122 sizeof(adapter->tx_ring->name) - 1, 2123 "%.14s-tx-0", netdev->name); 2124 else 2125 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ); 2126 err = request_irq(adapter->msix_entries[vector].vector, 2127 e1000_intr_msix_tx, 0, adapter->tx_ring->name, 2128 netdev); 2129 if (err) 2130 return err; 2131 adapter->tx_ring->itr_register = adapter->hw.hw_addr + 2132 E1000_EITR_82574(vector); 2133 adapter->tx_ring->itr_val = adapter->itr; 2134 vector++; 2135 2136 err = request_irq(adapter->msix_entries[vector].vector, 2137 e1000_msix_other, 0, netdev->name, netdev); 2138 if (err) 2139 return err; 2140 2141 e1000_configure_msix(adapter); 2142 2143 return 0; 2144 } 2145 2146 /** 2147 * e1000_request_irq - initialize interrupts 2148 * @adapter: board private structure 2149 * 2150 * Attempts to configure interrupts using the best available 2151 * capabilities of the hardware and kernel. 2152 **/ 2153 static int e1000_request_irq(struct e1000_adapter *adapter) 2154 { 2155 struct net_device *netdev = adapter->netdev; 2156 int err; 2157 2158 if (adapter->msix_entries) { 2159 err = e1000_request_msix(adapter); 2160 if (!err) 2161 return err; 2162 /* fall back to MSI */ 2163 e1000e_reset_interrupt_capability(adapter); 2164 adapter->int_mode = E1000E_INT_MODE_MSI; 2165 e1000e_set_interrupt_capability(adapter); 2166 } 2167 if (adapter->flags & FLAG_MSI_ENABLED) { 2168 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0, 2169 netdev->name, netdev); 2170 if (!err) 2171 return err; 2172 2173 /* fall back to legacy interrupt */ 2174 e1000e_reset_interrupt_capability(adapter); 2175 adapter->int_mode = E1000E_INT_MODE_LEGACY; 2176 } 2177 2178 err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED, 2179 netdev->name, netdev); 2180 if (err) 2181 e_err("Unable to allocate interrupt, Error: %d\n", err); 2182 2183 return err; 2184 } 2185 2186 static void e1000_free_irq(struct e1000_adapter *adapter) 2187 { 2188 struct net_device *netdev = adapter->netdev; 2189 2190 if (adapter->msix_entries) { 2191 int vector = 0; 2192 2193 free_irq(adapter->msix_entries[vector].vector, netdev); 2194 vector++; 2195 2196 free_irq(adapter->msix_entries[vector].vector, netdev); 2197 vector++; 2198 2199 /* Other Causes interrupt vector */ 2200 free_irq(adapter->msix_entries[vector].vector, netdev); 2201 return; 2202 } 2203 2204 free_irq(adapter->pdev->irq, netdev); 2205 } 2206 2207 /** 2208 * e1000_irq_disable - Mask off interrupt generation on the NIC 2209 * @adapter: board private structure 2210 **/ 2211 static void e1000_irq_disable(struct e1000_adapter *adapter) 2212 { 2213 struct e1000_hw *hw = &adapter->hw; 2214 2215 ew32(IMC, ~0); 2216 if (adapter->msix_entries) 2217 ew32(EIAC_82574, 0); 2218 e1e_flush(); 2219 2220 if (adapter->msix_entries) { 2221 int i; 2222 2223 for (i = 0; i < adapter->num_vectors; i++) 2224 synchronize_irq(adapter->msix_entries[i].vector); 2225 } else { 2226 synchronize_irq(adapter->pdev->irq); 2227 } 2228 } 2229 2230 /** 2231 * e1000_irq_enable - Enable default interrupt generation settings 2232 * @adapter: board private structure 2233 **/ 2234 static void e1000_irq_enable(struct e1000_adapter *adapter) 2235 { 2236 struct e1000_hw *hw = &adapter->hw; 2237 2238 if (adapter->msix_entries) { 2239 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574); 2240 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | 2241 IMS_OTHER_MASK); 2242 } else if (hw->mac.type >= e1000_pch_lpt) { 2243 ew32(IMS, IMS_ENABLE_MASK | E1000_IMS_ECCER); 2244 } else { 2245 ew32(IMS, IMS_ENABLE_MASK); 2246 } 2247 e1e_flush(); 2248 } 2249 2250 /** 2251 * e1000e_get_hw_control - get control of the h/w from f/w 2252 * @adapter: address of board private structure 2253 * 2254 * e1000e_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit. 2255 * For ASF and Pass Through versions of f/w this means that 2256 * the driver is loaded. For AMT version (only with 82573) 2257 * of the f/w this means that the network i/f is open. 2258 **/ 2259 void e1000e_get_hw_control(struct e1000_adapter *adapter) 2260 { 2261 struct e1000_hw *hw = &adapter->hw; 2262 u32 ctrl_ext; 2263 u32 swsm; 2264 2265 /* Let firmware know the driver has taken over */ 2266 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) { 2267 swsm = er32(SWSM); 2268 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD); 2269 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) { 2270 ctrl_ext = er32(CTRL_EXT); 2271 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD); 2272 } 2273 } 2274 2275 /** 2276 * e1000e_release_hw_control - release control of the h/w to f/w 2277 * @adapter: address of board private structure 2278 * 2279 * e1000e_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit. 2280 * For ASF and Pass Through versions of f/w this means that the 2281 * driver is no longer loaded. For AMT version (only with 82573) i 2282 * of the f/w this means that the network i/f is closed. 2283 * 2284 **/ 2285 void e1000e_release_hw_control(struct e1000_adapter *adapter) 2286 { 2287 struct e1000_hw *hw = &adapter->hw; 2288 u32 ctrl_ext; 2289 u32 swsm; 2290 2291 /* Let firmware taken over control of h/w */ 2292 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) { 2293 swsm = er32(SWSM); 2294 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD); 2295 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) { 2296 ctrl_ext = er32(CTRL_EXT); 2297 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD); 2298 } 2299 } 2300 2301 /** 2302 * e1000_alloc_ring_dma - allocate memory for a ring structure 2303 * @adapter: board private structure 2304 * @ring: ring struct for which to allocate dma 2305 **/ 2306 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter, 2307 struct e1000_ring *ring) 2308 { 2309 struct pci_dev *pdev = adapter->pdev; 2310 2311 ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma, 2312 GFP_KERNEL); 2313 if (!ring->desc) 2314 return -ENOMEM; 2315 2316 return 0; 2317 } 2318 2319 /** 2320 * e1000e_setup_tx_resources - allocate Tx resources (Descriptors) 2321 * @tx_ring: Tx descriptor ring 2322 * 2323 * Return 0 on success, negative on failure 2324 **/ 2325 int e1000e_setup_tx_resources(struct e1000_ring *tx_ring) 2326 { 2327 struct e1000_adapter *adapter = tx_ring->adapter; 2328 int err = -ENOMEM, size; 2329 2330 size = sizeof(struct e1000_buffer) * tx_ring->count; 2331 tx_ring->buffer_info = vzalloc(size); 2332 if (!tx_ring->buffer_info) 2333 goto err; 2334 2335 /* round up to nearest 4K */ 2336 tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc); 2337 tx_ring->size = ALIGN(tx_ring->size, 4096); 2338 2339 err = e1000_alloc_ring_dma(adapter, tx_ring); 2340 if (err) 2341 goto err; 2342 2343 tx_ring->next_to_use = 0; 2344 tx_ring->next_to_clean = 0; 2345 2346 return 0; 2347 err: 2348 vfree(tx_ring->buffer_info); 2349 e_err("Unable to allocate memory for the transmit descriptor ring\n"); 2350 return err; 2351 } 2352 2353 /** 2354 * e1000e_setup_rx_resources - allocate Rx resources (Descriptors) 2355 * @rx_ring: Rx descriptor ring 2356 * 2357 * Returns 0 on success, negative on failure 2358 **/ 2359 int e1000e_setup_rx_resources(struct e1000_ring *rx_ring) 2360 { 2361 struct e1000_adapter *adapter = rx_ring->adapter; 2362 struct e1000_buffer *buffer_info; 2363 int i, size, desc_len, err = -ENOMEM; 2364 2365 size = sizeof(struct e1000_buffer) * rx_ring->count; 2366 rx_ring->buffer_info = vzalloc(size); 2367 if (!rx_ring->buffer_info) 2368 goto err; 2369 2370 for (i = 0; i < rx_ring->count; i++) { 2371 buffer_info = &rx_ring->buffer_info[i]; 2372 buffer_info->ps_pages = kzalloc_objs(struct e1000_ps_page, 2373 PS_PAGE_BUFFERS); 2374 if (!buffer_info->ps_pages) 2375 goto err_pages; 2376 } 2377 2378 desc_len = sizeof(union e1000_rx_desc_packet_split); 2379 2380 /* Round up to nearest 4K */ 2381 rx_ring->size = rx_ring->count * desc_len; 2382 rx_ring->size = ALIGN(rx_ring->size, 4096); 2383 2384 err = e1000_alloc_ring_dma(adapter, rx_ring); 2385 if (err) 2386 goto err_pages; 2387 2388 rx_ring->next_to_clean = 0; 2389 rx_ring->next_to_use = 0; 2390 rx_ring->rx_skb_top = NULL; 2391 2392 return 0; 2393 2394 err_pages: 2395 for (i = 0; i < rx_ring->count; i++) { 2396 buffer_info = &rx_ring->buffer_info[i]; 2397 kfree(buffer_info->ps_pages); 2398 } 2399 err: 2400 vfree(rx_ring->buffer_info); 2401 e_err("Unable to allocate memory for the receive descriptor ring\n"); 2402 return err; 2403 } 2404 2405 /** 2406 * e1000_clean_tx_ring - Free Tx Buffers 2407 * @tx_ring: Tx descriptor ring 2408 **/ 2409 static void e1000_clean_tx_ring(struct e1000_ring *tx_ring) 2410 { 2411 struct e1000_adapter *adapter = tx_ring->adapter; 2412 struct e1000_buffer *buffer_info; 2413 unsigned long size; 2414 unsigned int i; 2415 2416 for (i = 0; i < tx_ring->count; i++) { 2417 buffer_info = &tx_ring->buffer_info[i]; 2418 e1000_put_txbuf(tx_ring, buffer_info, false); 2419 } 2420 2421 netdev_reset_queue(adapter->netdev); 2422 size = sizeof(struct e1000_buffer) * tx_ring->count; 2423 memset(tx_ring->buffer_info, 0, size); 2424 2425 memset(tx_ring->desc, 0, tx_ring->size); 2426 2427 tx_ring->next_to_use = 0; 2428 tx_ring->next_to_clean = 0; 2429 } 2430 2431 /** 2432 * e1000e_free_tx_resources - Free Tx Resources per Queue 2433 * @tx_ring: Tx descriptor ring 2434 * 2435 * Free all transmit software resources 2436 **/ 2437 void e1000e_free_tx_resources(struct e1000_ring *tx_ring) 2438 { 2439 struct e1000_adapter *adapter = tx_ring->adapter; 2440 struct pci_dev *pdev = adapter->pdev; 2441 2442 e1000_clean_tx_ring(tx_ring); 2443 2444 vfree(tx_ring->buffer_info); 2445 tx_ring->buffer_info = NULL; 2446 2447 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, 2448 tx_ring->dma); 2449 tx_ring->desc = NULL; 2450 } 2451 2452 /** 2453 * e1000e_free_rx_resources - Free Rx Resources 2454 * @rx_ring: Rx descriptor ring 2455 * 2456 * Free all receive software resources 2457 **/ 2458 void e1000e_free_rx_resources(struct e1000_ring *rx_ring) 2459 { 2460 struct e1000_adapter *adapter = rx_ring->adapter; 2461 struct pci_dev *pdev = adapter->pdev; 2462 int i; 2463 2464 e1000_clean_rx_ring(rx_ring); 2465 2466 for (i = 0; i < rx_ring->count; i++) 2467 kfree(rx_ring->buffer_info[i].ps_pages); 2468 2469 vfree(rx_ring->buffer_info); 2470 rx_ring->buffer_info = NULL; 2471 2472 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, 2473 rx_ring->dma); 2474 rx_ring->desc = NULL; 2475 } 2476 2477 /** 2478 * e1000_update_itr - update the dynamic ITR value based on statistics 2479 * @itr_setting: current adapter->itr 2480 * @packets: the number of packets during this measurement interval 2481 * @bytes: the number of bytes during this measurement interval 2482 * 2483 * Stores a new ITR value based on packets and byte 2484 * counts during the last interrupt. The advantage of per interrupt 2485 * computation is faster updates and more accurate ITR for the current 2486 * traffic pattern. Constants in this function were computed 2487 * based on theoretical maximum wire speed and thresholds were set based 2488 * on testing data as well as attempting to minimize response time 2489 * while increasing bulk throughput. This functionality is controlled 2490 * by the InterruptThrottleRate module parameter. 2491 **/ 2492 static unsigned int e1000_update_itr(u16 itr_setting, int packets, int bytes) 2493 { 2494 unsigned int retval = itr_setting; 2495 2496 if (packets == 0) 2497 return itr_setting; 2498 2499 switch (itr_setting) { 2500 case lowest_latency: 2501 /* handle TSO and jumbo frames */ 2502 if (bytes / packets > 8000) 2503 retval = bulk_latency; 2504 else if ((packets < 5) && (bytes > 512)) 2505 retval = low_latency; 2506 break; 2507 case low_latency: /* 50 usec aka 20000 ints/s */ 2508 if (bytes > 10000) { 2509 /* this if handles the TSO accounting */ 2510 if (bytes / packets > 8000) 2511 retval = bulk_latency; 2512 else if ((packets < 10) || ((bytes / packets) > 1200)) 2513 retval = bulk_latency; 2514 else if ((packets > 35)) 2515 retval = lowest_latency; 2516 } else if (bytes / packets > 2000) { 2517 retval = bulk_latency; 2518 } else if (packets <= 2 && bytes < 512) { 2519 retval = lowest_latency; 2520 } 2521 break; 2522 case bulk_latency: /* 250 usec aka 4000 ints/s */ 2523 if (bytes > 25000) { 2524 if (packets > 35) 2525 retval = low_latency; 2526 } else if (bytes < 6000) { 2527 retval = low_latency; 2528 } 2529 break; 2530 } 2531 2532 return retval; 2533 } 2534 2535 static void e1000_set_itr(struct e1000_adapter *adapter) 2536 { 2537 u16 current_itr; 2538 u32 new_itr = adapter->itr; 2539 2540 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */ 2541 if (adapter->link_speed != SPEED_1000) { 2542 new_itr = 4000; 2543 goto set_itr_now; 2544 } 2545 2546 if (adapter->flags2 & FLAG2_DISABLE_AIM) { 2547 new_itr = 0; 2548 goto set_itr_now; 2549 } 2550 2551 adapter->tx_itr = e1000_update_itr(adapter->tx_itr, 2552 adapter->total_tx_packets, 2553 adapter->total_tx_bytes); 2554 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 2555 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency) 2556 adapter->tx_itr = low_latency; 2557 2558 adapter->rx_itr = e1000_update_itr(adapter->rx_itr, 2559 adapter->total_rx_packets, 2560 adapter->total_rx_bytes); 2561 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 2562 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency) 2563 adapter->rx_itr = low_latency; 2564 2565 current_itr = max(adapter->rx_itr, adapter->tx_itr); 2566 2567 /* counts and packets in update_itr are dependent on these numbers */ 2568 switch (current_itr) { 2569 case lowest_latency: 2570 new_itr = 70000; 2571 break; 2572 case low_latency: 2573 new_itr = 20000; /* aka hwitr = ~200 */ 2574 break; 2575 case bulk_latency: 2576 new_itr = 4000; 2577 break; 2578 default: 2579 break; 2580 } 2581 2582 set_itr_now: 2583 if (new_itr != adapter->itr) { 2584 /* this attempts to bias the interrupt rate towards Bulk 2585 * by adding intermediate steps when interrupt rate is 2586 * increasing 2587 */ 2588 new_itr = new_itr > adapter->itr ? 2589 min(adapter->itr + (new_itr >> 2), new_itr) : new_itr; 2590 adapter->itr = new_itr; 2591 adapter->rx_ring->itr_val = new_itr; 2592 if (adapter->msix_entries) 2593 adapter->rx_ring->set_itr = 1; 2594 else 2595 e1000e_write_itr(adapter, new_itr); 2596 } 2597 } 2598 2599 /** 2600 * e1000e_write_itr - write the ITR value to the appropriate registers 2601 * @adapter: address of board private structure 2602 * @itr: new ITR value to program 2603 * 2604 * e1000e_write_itr determines if the adapter is in MSI-X mode 2605 * and, if so, writes the EITR registers with the ITR value. 2606 * Otherwise, it writes the ITR value into the ITR register. 2607 **/ 2608 void e1000e_write_itr(struct e1000_adapter *adapter, u32 itr) 2609 { 2610 struct e1000_hw *hw = &adapter->hw; 2611 u32 new_itr = itr ? 1000000000 / (itr * 256) : 0; 2612 2613 if (adapter->msix_entries) { 2614 int vector; 2615 2616 for (vector = 0; vector < adapter->num_vectors; vector++) 2617 writel(new_itr, hw->hw_addr + E1000_EITR_82574(vector)); 2618 } else { 2619 ew32(ITR, new_itr); 2620 } 2621 } 2622 2623 /** 2624 * e1000_alloc_queues - Allocate memory for all rings 2625 * @adapter: board private structure to initialize 2626 **/ 2627 static int e1000_alloc_queues(struct e1000_adapter *adapter) 2628 { 2629 int size = sizeof(struct e1000_ring); 2630 2631 adapter->tx_ring = kzalloc(size, GFP_KERNEL); 2632 if (!adapter->tx_ring) 2633 goto err; 2634 adapter->tx_ring->count = adapter->tx_ring_count; 2635 adapter->tx_ring->adapter = adapter; 2636 2637 adapter->rx_ring = kzalloc(size, GFP_KERNEL); 2638 if (!adapter->rx_ring) 2639 goto err; 2640 adapter->rx_ring->count = adapter->rx_ring_count; 2641 adapter->rx_ring->adapter = adapter; 2642 2643 return 0; 2644 err: 2645 e_err("Unable to allocate memory for queues\n"); 2646 kfree(adapter->rx_ring); 2647 kfree(adapter->tx_ring); 2648 return -ENOMEM; 2649 } 2650 2651 /** 2652 * e1000e_poll - NAPI Rx polling callback 2653 * @napi: struct associated with this polling callback 2654 * @budget: number of packets driver is allowed to process this poll 2655 **/ 2656 static int e1000e_poll(struct napi_struct *napi, int budget) 2657 { 2658 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, 2659 napi); 2660 struct e1000_hw *hw = &adapter->hw; 2661 struct net_device *poll_dev = adapter->netdev; 2662 int tx_cleaned = 1, work_done = 0; 2663 2664 adapter = netdev_priv(poll_dev); 2665 2666 if (!adapter->msix_entries || 2667 (adapter->rx_ring->ims_val & adapter->tx_ring->ims_val)) 2668 tx_cleaned = e1000_clean_tx_irq(adapter->tx_ring); 2669 2670 adapter->clean_rx(adapter->rx_ring, &work_done, budget); 2671 2672 if (!tx_cleaned || work_done == budget) 2673 return budget; 2674 2675 /* Exit the polling mode, but don't re-enable interrupts if stack might 2676 * poll us due to busy-polling 2677 */ 2678 if (likely(napi_complete_done(napi, work_done))) { 2679 if (adapter->itr_setting & 3) 2680 e1000_set_itr(adapter); 2681 if (!test_bit(__E1000_DOWN, &adapter->state)) { 2682 if (adapter->msix_entries) 2683 ew32(IMS, adapter->rx_ring->ims_val); 2684 else 2685 e1000_irq_enable(adapter); 2686 } 2687 } 2688 2689 return work_done; 2690 } 2691 2692 static int e1000_vlan_rx_add_vid(struct net_device *netdev, 2693 __always_unused __be16 proto, u16 vid) 2694 { 2695 struct e1000_adapter *adapter = netdev_priv(netdev); 2696 struct e1000_hw *hw = &adapter->hw; 2697 u32 vfta, index; 2698 2699 /* don't update vlan cookie if already programmed */ 2700 if ((adapter->hw.mng_cookie.status & 2701 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) && 2702 (vid == adapter->mng_vlan_id)) 2703 return 0; 2704 2705 /* add VID to filter table */ 2706 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2707 index = (vid >> 5) & 0x7F; 2708 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index); 2709 vfta |= BIT((vid & 0x1F)); 2710 hw->mac.ops.write_vfta(hw, index, vfta); 2711 } 2712 2713 set_bit(vid, adapter->active_vlans); 2714 2715 return 0; 2716 } 2717 2718 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, 2719 __always_unused __be16 proto, u16 vid) 2720 { 2721 struct e1000_adapter *adapter = netdev_priv(netdev); 2722 struct e1000_hw *hw = &adapter->hw; 2723 u32 vfta, index; 2724 2725 if ((adapter->hw.mng_cookie.status & 2726 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) && 2727 (vid == adapter->mng_vlan_id)) { 2728 /* release control to f/w */ 2729 e1000e_release_hw_control(adapter); 2730 return 0; 2731 } 2732 2733 /* remove VID from filter table */ 2734 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2735 index = (vid >> 5) & 0x7F; 2736 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index); 2737 vfta &= ~BIT((vid & 0x1F)); 2738 hw->mac.ops.write_vfta(hw, index, vfta); 2739 } 2740 2741 clear_bit(vid, adapter->active_vlans); 2742 2743 return 0; 2744 } 2745 2746 /** 2747 * e1000e_vlan_filter_disable - helper to disable hw VLAN filtering 2748 * @adapter: board private structure to initialize 2749 **/ 2750 static void e1000e_vlan_filter_disable(struct e1000_adapter *adapter) 2751 { 2752 struct net_device *netdev = adapter->netdev; 2753 struct e1000_hw *hw = &adapter->hw; 2754 u32 rctl; 2755 2756 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2757 /* disable VLAN receive filtering */ 2758 rctl = er32(RCTL); 2759 rctl &= ~(E1000_RCTL_VFE | E1000_RCTL_CFIEN); 2760 ew32(RCTL, rctl); 2761 2762 if (adapter->mng_vlan_id != E1000_MNG_VLAN_NONE) { 2763 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), 2764 adapter->mng_vlan_id); 2765 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; 2766 } 2767 } 2768 } 2769 2770 /** 2771 * e1000e_vlan_filter_enable - helper to enable HW VLAN filtering 2772 * @adapter: board private structure to initialize 2773 **/ 2774 static void e1000e_vlan_filter_enable(struct e1000_adapter *adapter) 2775 { 2776 struct e1000_hw *hw = &adapter->hw; 2777 u32 rctl; 2778 2779 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2780 /* enable VLAN receive filtering */ 2781 rctl = er32(RCTL); 2782 rctl |= E1000_RCTL_VFE; 2783 rctl &= ~E1000_RCTL_CFIEN; 2784 ew32(RCTL, rctl); 2785 } 2786 } 2787 2788 /** 2789 * e1000e_vlan_strip_disable - helper to disable HW VLAN stripping 2790 * @adapter: board private structure to initialize 2791 **/ 2792 static void e1000e_vlan_strip_disable(struct e1000_adapter *adapter) 2793 { 2794 struct e1000_hw *hw = &adapter->hw; 2795 u32 ctrl; 2796 2797 /* disable VLAN tag insert/strip */ 2798 ctrl = er32(CTRL); 2799 ctrl &= ~E1000_CTRL_VME; 2800 ew32(CTRL, ctrl); 2801 } 2802 2803 /** 2804 * e1000e_vlan_strip_enable - helper to enable HW VLAN stripping 2805 * @adapter: board private structure to initialize 2806 **/ 2807 static void e1000e_vlan_strip_enable(struct e1000_adapter *adapter) 2808 { 2809 struct e1000_hw *hw = &adapter->hw; 2810 u32 ctrl; 2811 2812 /* enable VLAN tag insert/strip */ 2813 ctrl = er32(CTRL); 2814 ctrl |= E1000_CTRL_VME; 2815 ew32(CTRL, ctrl); 2816 } 2817 2818 static void e1000_update_mng_vlan(struct e1000_adapter *adapter) 2819 { 2820 struct net_device *netdev = adapter->netdev; 2821 u16 vid = adapter->hw.mng_cookie.vlan_id; 2822 u16 old_vid = adapter->mng_vlan_id; 2823 2824 if (adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) { 2825 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid); 2826 adapter->mng_vlan_id = vid; 2827 } 2828 2829 if (old_vid != E1000_MNG_VLAN_NONE && vid != old_vid) 2830 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), old_vid); 2831 } 2832 2833 static void e1000_restore_vlan(struct e1000_adapter *adapter) 2834 { 2835 u16 vid; 2836 2837 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0); 2838 2839 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 2840 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid); 2841 } 2842 2843 static void e1000_init_manageability_pt(struct e1000_adapter *adapter) 2844 { 2845 struct e1000_hw *hw = &adapter->hw; 2846 u32 manc, manc2h, mdef, i, j; 2847 2848 if (!(adapter->flags & FLAG_MNG_PT_ENABLED)) 2849 return; 2850 2851 manc = er32(MANC); 2852 2853 /* enable receiving management packets to the host. this will probably 2854 * generate destination unreachable messages from the host OS, but 2855 * the packets will be handled on SMBUS 2856 */ 2857 manc |= E1000_MANC_EN_MNG2HOST; 2858 manc2h = er32(MANC2H); 2859 2860 switch (hw->mac.type) { 2861 default: 2862 manc2h |= (E1000_MANC2H_PORT_623 | E1000_MANC2H_PORT_664); 2863 break; 2864 case e1000_82574: 2865 case e1000_82583: 2866 /* Check if IPMI pass-through decision filter already exists; 2867 * if so, enable it. 2868 */ 2869 for (i = 0, j = 0; i < 8; i++) { 2870 mdef = er32(MDEF(i)); 2871 2872 /* Ignore filters with anything other than IPMI ports */ 2873 if (mdef & ~(E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664)) 2874 continue; 2875 2876 /* Enable this decision filter in MANC2H */ 2877 if (mdef) 2878 manc2h |= BIT(i); 2879 2880 j |= mdef; 2881 } 2882 2883 if (j == (E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664)) 2884 break; 2885 2886 /* Create new decision filter in an empty filter */ 2887 for (i = 0, j = 0; i < 8; i++) 2888 if (er32(MDEF(i)) == 0) { 2889 ew32(MDEF(i), (E1000_MDEF_PORT_623 | 2890 E1000_MDEF_PORT_664)); 2891 manc2h |= BIT(1); 2892 j++; 2893 break; 2894 } 2895 2896 if (!j) 2897 e_warn("Unable to create IPMI pass-through filter\n"); 2898 break; 2899 } 2900 2901 ew32(MANC2H, manc2h); 2902 ew32(MANC, manc); 2903 } 2904 2905 /** 2906 * e1000_configure_tx - Configure Transmit Unit after Reset 2907 * @adapter: board private structure 2908 * 2909 * Configure the Tx unit of the MAC after a reset. 2910 **/ 2911 static void e1000_configure_tx(struct e1000_adapter *adapter) 2912 { 2913 struct e1000_hw *hw = &adapter->hw; 2914 struct e1000_ring *tx_ring = adapter->tx_ring; 2915 u64 tdba; 2916 u32 tdlen, tctl, tarc; 2917 2918 /* Setup the HW Tx Head and Tail descriptor pointers */ 2919 tdba = tx_ring->dma; 2920 tdlen = tx_ring->count * sizeof(struct e1000_tx_desc); 2921 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32))); 2922 ew32(TDBAH(0), (tdba >> 32)); 2923 ew32(TDLEN(0), tdlen); 2924 ew32(TDH(0), 0); 2925 ew32(TDT(0), 0); 2926 tx_ring->head = adapter->hw.hw_addr + E1000_TDH(0); 2927 tx_ring->tail = adapter->hw.hw_addr + E1000_TDT(0); 2928 2929 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 2930 e1000e_update_tdt_wa(tx_ring, 0); 2931 2932 /* Set the Tx Interrupt Delay register */ 2933 ew32(TIDV, adapter->tx_int_delay); 2934 /* Tx irq moderation */ 2935 ew32(TADV, adapter->tx_abs_int_delay); 2936 2937 if (adapter->flags2 & FLAG2_DMA_BURST) { 2938 u32 txdctl = er32(TXDCTL(0)); 2939 2940 txdctl &= ~(E1000_TXDCTL_PTHRESH | E1000_TXDCTL_HTHRESH | 2941 E1000_TXDCTL_WTHRESH); 2942 /* set up some performance related parameters to encourage the 2943 * hardware to use the bus more efficiently in bursts, depends 2944 * on the tx_int_delay to be enabled, 2945 * wthresh = 1 ==> burst write is disabled to avoid Tx stalls 2946 * hthresh = 1 ==> prefetch when one or more available 2947 * pthresh = 0x1f ==> prefetch if internal cache 31 or less 2948 * BEWARE: this seems to work but should be considered first if 2949 * there are Tx hangs or other Tx related bugs 2950 */ 2951 txdctl |= E1000_TXDCTL_DMA_BURST_ENABLE; 2952 ew32(TXDCTL(0), txdctl); 2953 } 2954 /* erratum work around: set txdctl the same for both queues */ 2955 ew32(TXDCTL(1), er32(TXDCTL(0))); 2956 2957 /* Program the Transmit Control Register */ 2958 tctl = er32(TCTL); 2959 tctl &= ~E1000_TCTL_CT; 2960 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC | 2961 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT); 2962 2963 if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) { 2964 tarc = er32(TARC(0)); 2965 /* set the speed mode bit, we'll clear it if we're not at 2966 * gigabit link later 2967 */ 2968 #define SPEED_MODE_BIT BIT(21) 2969 tarc |= SPEED_MODE_BIT; 2970 ew32(TARC(0), tarc); 2971 } 2972 2973 /* errata: program both queues to unweighted RR */ 2974 if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) { 2975 tarc = er32(TARC(0)); 2976 tarc |= 1; 2977 ew32(TARC(0), tarc); 2978 tarc = er32(TARC(1)); 2979 tarc |= 1; 2980 ew32(TARC(1), tarc); 2981 } 2982 2983 /* Setup Transmit Descriptor Settings for eop descriptor */ 2984 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS; 2985 2986 /* only set IDE if we are delaying interrupts using the timers */ 2987 if (adapter->tx_int_delay) 2988 adapter->txd_cmd |= E1000_TXD_CMD_IDE; 2989 2990 /* enable Report Status bit */ 2991 adapter->txd_cmd |= E1000_TXD_CMD_RS; 2992 2993 ew32(TCTL, tctl); 2994 2995 hw->mac.ops.config_collision_dist(hw); 2996 2997 /* SPT and KBL Si errata workaround to avoid data corruption */ 2998 if (hw->mac.type == e1000_pch_spt) { 2999 u32 reg_val; 3000 3001 reg_val = er32(IOSFPC); 3002 reg_val |= E1000_RCTL_RDMTS_HEX; 3003 ew32(IOSFPC, reg_val); 3004 3005 reg_val = er32(TARC(0)); 3006 /* SPT and KBL Si errata workaround to avoid Tx hang. 3007 * Dropping the number of outstanding requests from 3008 * 3 to 2 in order to avoid a buffer overrun. 3009 */ 3010 reg_val &= ~E1000_TARC0_CB_MULTIQ_3_REQ; 3011 reg_val |= E1000_TARC0_CB_MULTIQ_2_REQ; 3012 ew32(TARC(0), reg_val); 3013 } 3014 } 3015 3016 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \ 3017 (((S) & (PAGE_SIZE - 1)) ? 1 : 0)) 3018 3019 /** 3020 * e1000_setup_rctl - configure the receive control registers 3021 * @adapter: Board private structure 3022 **/ 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 fallthrough; 3142 case 2: 3143 psrctl |= PAGE_SIZE << E1000_PSRCTL_BSIZE2_SHIFT; 3144 fallthrough; 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, 11000); 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 3224 /* set the Receive Delay Timer Register */ 3225 ew32(RDTR, adapter->rx_int_delay); 3226 3227 /* irq moderation */ 3228 ew32(RADV, adapter->rx_abs_int_delay); 3229 if ((adapter->itr_setting != 0) && (adapter->itr != 0)) 3230 e1000e_write_itr(adapter, adapter->itr); 3231 3232 ctrl_ext = er32(CTRL_EXT); 3233 /* Auto-Mask interrupts upon ICR access */ 3234 ctrl_ext |= E1000_CTRL_EXT_IAME; 3235 ew32(IAM, 0xffffffff); 3236 ew32(CTRL_EXT, ctrl_ext); 3237 e1e_flush(); 3238 3239 /* Setup the HW Rx Head and Tail Descriptor Pointers and 3240 * the Base and Length of the Rx Descriptor Ring 3241 */ 3242 rdba = rx_ring->dma; 3243 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32))); 3244 ew32(RDBAH(0), (rdba >> 32)); 3245 ew32(RDLEN(0), rdlen); 3246 ew32(RDH(0), 0); 3247 ew32(RDT(0), 0); 3248 rx_ring->head = adapter->hw.hw_addr + E1000_RDH(0); 3249 rx_ring->tail = adapter->hw.hw_addr + E1000_RDT(0); 3250 3251 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 3252 e1000e_update_rdt_wa(rx_ring, 0); 3253 3254 /* Enable Receive Checksum Offload for TCP and UDP */ 3255 rxcsum = er32(RXCSUM); 3256 if (adapter->netdev->features & NETIF_F_RXCSUM) 3257 rxcsum |= E1000_RXCSUM_TUOFL; 3258 else 3259 rxcsum &= ~E1000_RXCSUM_TUOFL; 3260 ew32(RXCSUM, rxcsum); 3261 3262 /* With jumbo frames, excessive C-state transition latencies result 3263 * in dropped transactions. 3264 */ 3265 if (adapter->netdev->mtu > ETH_DATA_LEN) { 3266 u32 lat = 3267 ((er32(PBA) & E1000_PBA_RXA_MASK) * 1024 - 3268 adapter->max_frame_size) * 8 / 1000; 3269 3270 if (adapter->flags & FLAG_IS_ICH) { 3271 u32 rxdctl = er32(RXDCTL(0)); 3272 3273 ew32(RXDCTL(0), rxdctl | 0x3 | BIT(8)); 3274 } 3275 3276 dev_info(&adapter->pdev->dev, 3277 "Some CPU C-states have been disabled in order to enable jumbo frames\n"); 3278 cpu_latency_qos_update_request(&adapter->pm_qos_req, lat); 3279 } else { 3280 cpu_latency_qos_update_request(&adapter->pm_qos_req, 3281 PM_QOS_DEFAULT_VALUE); 3282 } 3283 3284 /* Enable Receives */ 3285 ew32(RCTL, rctl); 3286 } 3287 3288 /** 3289 * e1000e_write_mc_addr_list - write multicast addresses to MTA 3290 * @netdev: network interface device structure 3291 * 3292 * Writes multicast address list to the MTA hash table. 3293 * Returns: -ENOMEM on failure 3294 * 0 on no addresses written 3295 * X on writing X addresses to MTA 3296 */ 3297 static int e1000e_write_mc_addr_list(struct net_device *netdev) 3298 { 3299 struct e1000_adapter *adapter = netdev_priv(netdev); 3300 struct e1000_hw *hw = &adapter->hw; 3301 struct netdev_hw_addr *ha; 3302 u8 *mta_list; 3303 int i; 3304 3305 if (netdev_mc_empty(netdev)) { 3306 /* nothing to program, so clear mc list */ 3307 hw->mac.ops.update_mc_addr_list(hw, NULL, 0); 3308 return 0; 3309 } 3310 3311 mta_list = kcalloc(netdev_mc_count(netdev), ETH_ALEN, GFP_ATOMIC); 3312 if (!mta_list) 3313 return -ENOMEM; 3314 3315 /* update_mc_addr_list expects a packed array of only addresses. */ 3316 i = 0; 3317 netdev_for_each_mc_addr(ha, netdev) 3318 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN); 3319 3320 hw->mac.ops.update_mc_addr_list(hw, mta_list, i); 3321 kfree(mta_list); 3322 3323 return netdev_mc_count(netdev); 3324 } 3325 3326 /** 3327 * e1000e_write_uc_addr_list - write unicast addresses to RAR table 3328 * @netdev: network interface device structure 3329 * 3330 * Writes unicast address list to the RAR table. 3331 * Returns: -ENOMEM on failure/insufficient address space 3332 * 0 on no addresses written 3333 * X on writing X addresses to the RAR table 3334 **/ 3335 static int e1000e_write_uc_addr_list(struct net_device *netdev) 3336 { 3337 struct e1000_adapter *adapter = netdev_priv(netdev); 3338 struct e1000_hw *hw = &adapter->hw; 3339 unsigned int rar_entries; 3340 int count = 0; 3341 3342 rar_entries = hw->mac.ops.rar_get_count(hw); 3343 3344 /* save a rar entry for our hardware address */ 3345 rar_entries--; 3346 3347 /* save a rar entry for the LAA workaround */ 3348 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) 3349 rar_entries--; 3350 3351 /* return ENOMEM indicating insufficient memory for addresses */ 3352 if (netdev_uc_count(netdev) > rar_entries) 3353 return -ENOMEM; 3354 3355 if (!netdev_uc_empty(netdev) && rar_entries) { 3356 struct netdev_hw_addr *ha; 3357 3358 /* write the addresses in reverse order to avoid write 3359 * combining 3360 */ 3361 netdev_for_each_uc_addr(ha, netdev) { 3362 int ret_val; 3363 3364 if (!rar_entries) 3365 break; 3366 ret_val = hw->mac.ops.rar_set(hw, ha->addr, rar_entries--); 3367 if (ret_val < 0) 3368 return -ENOMEM; 3369 count++; 3370 } 3371 } 3372 3373 /* zero out the remaining RAR entries not used above */ 3374 for (; rar_entries > 0; rar_entries--) { 3375 ew32(RAH(rar_entries), 0); 3376 ew32(RAL(rar_entries), 0); 3377 } 3378 e1e_flush(); 3379 3380 return count; 3381 } 3382 3383 /** 3384 * e1000e_set_rx_mode - secondary unicast, Multicast and Promiscuous mode set 3385 * @netdev: network interface device structure 3386 * 3387 * The ndo_set_rx_mode entry point is called whenever the unicast or multicast 3388 * address list or the network interface flags are updated. This routine is 3389 * responsible for configuring the hardware for proper unicast, multicast, 3390 * promiscuous mode, and all-multi behavior. 3391 **/ 3392 static void e1000e_set_rx_mode(struct net_device *netdev) 3393 { 3394 struct e1000_adapter *adapter = netdev_priv(netdev); 3395 struct e1000_hw *hw = &adapter->hw; 3396 u32 rctl; 3397 3398 if (pm_runtime_suspended(netdev->dev.parent)) 3399 return; 3400 3401 /* Check for Promiscuous and All Multicast modes */ 3402 rctl = er32(RCTL); 3403 3404 /* clear the affected bits */ 3405 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE); 3406 3407 if (netdev->flags & IFF_PROMISC) { 3408 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE); 3409 /* Do not hardware filter VLANs in promisc mode */ 3410 e1000e_vlan_filter_disable(adapter); 3411 } else { 3412 int count; 3413 3414 if (netdev->flags & IFF_ALLMULTI) { 3415 rctl |= E1000_RCTL_MPE; 3416 } else { 3417 /* Write addresses to the MTA, if the attempt fails 3418 * then we should just turn on promiscuous mode so 3419 * that we can at least receive multicast traffic 3420 */ 3421 count = e1000e_write_mc_addr_list(netdev); 3422 if (count < 0) 3423 rctl |= E1000_RCTL_MPE; 3424 } 3425 e1000e_vlan_filter_enable(adapter); 3426 /* Write addresses to available RAR registers, if there is not 3427 * sufficient space to store all the addresses then enable 3428 * unicast promiscuous mode 3429 */ 3430 count = e1000e_write_uc_addr_list(netdev); 3431 if (count < 0) 3432 rctl |= E1000_RCTL_UPE; 3433 } 3434 3435 ew32(RCTL, rctl); 3436 3437 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) 3438 e1000e_vlan_strip_enable(adapter); 3439 else 3440 e1000e_vlan_strip_disable(adapter); 3441 } 3442 3443 static void e1000e_setup_rss_hash(struct e1000_adapter *adapter) 3444 { 3445 struct e1000_hw *hw = &adapter->hw; 3446 u32 mrqc, rxcsum; 3447 u32 rss_key[10]; 3448 int i; 3449 3450 netdev_rss_key_fill(rss_key, sizeof(rss_key)); 3451 for (i = 0; i < 10; i++) 3452 ew32(RSSRK(i), rss_key[i]); 3453 3454 /* Direct all traffic to queue 0 */ 3455 for (i = 0; i < 32; i++) 3456 ew32(RETA(i), 0); 3457 3458 /* Disable raw packet checksumming so that RSS hash is placed in 3459 * descriptor on writeback. 3460 */ 3461 rxcsum = er32(RXCSUM); 3462 rxcsum |= E1000_RXCSUM_PCSD; 3463 3464 ew32(RXCSUM, rxcsum); 3465 3466 mrqc = (E1000_MRQC_RSS_FIELD_IPV4 | 3467 E1000_MRQC_RSS_FIELD_IPV4_TCP | 3468 E1000_MRQC_RSS_FIELD_IPV6 | 3469 E1000_MRQC_RSS_FIELD_IPV6_TCP | 3470 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX); 3471 3472 ew32(MRQC, mrqc); 3473 } 3474 3475 /** 3476 * e1000e_get_base_timinca - get default SYSTIM time increment attributes 3477 * @adapter: board private structure 3478 * @timinca: pointer to returned time increment attributes 3479 * 3480 * Get attributes for incrementing the System Time Register SYSTIML/H at 3481 * the default base frequency, and set the cyclecounter shift value. 3482 **/ 3483 s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca) 3484 { 3485 struct e1000_hw *hw = &adapter->hw; 3486 u32 incvalue, incperiod, shift; 3487 3488 /* Make sure clock is enabled on I217/I218/I219 before checking 3489 * the frequency 3490 */ 3491 if ((hw->mac.type >= e1000_pch_lpt) && 3492 !(er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) && 3493 !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_ENABLED)) { 3494 u32 fextnvm7 = er32(FEXTNVM7); 3495 3496 if (!(fextnvm7 & BIT(0))) { 3497 ew32(FEXTNVM7, fextnvm7 | BIT(0)); 3498 e1e_flush(); 3499 } 3500 } 3501 3502 switch (hw->mac.type) { 3503 case e1000_pch2lan: 3504 /* Stable 96MHz frequency */ 3505 incperiod = INCPERIOD_96MHZ; 3506 incvalue = INCVALUE_96MHZ; 3507 shift = INCVALUE_SHIFT_96MHZ; 3508 adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHZ; 3509 break; 3510 case e1000_pch_lpt: 3511 if (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI) { 3512 /* Stable 96MHz frequency */ 3513 incperiod = INCPERIOD_96MHZ; 3514 incvalue = INCVALUE_96MHZ; 3515 shift = INCVALUE_SHIFT_96MHZ; 3516 adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHZ; 3517 } else { 3518 /* Stable 25MHz frequency */ 3519 incperiod = INCPERIOD_25MHZ; 3520 incvalue = INCVALUE_25MHZ; 3521 shift = INCVALUE_SHIFT_25MHZ; 3522 adapter->cc.shift = shift; 3523 } 3524 break; 3525 case e1000_pch_spt: 3526 /* Stable 24MHz frequency */ 3527 incperiod = INCPERIOD_24MHZ; 3528 incvalue = INCVALUE_24MHZ; 3529 shift = INCVALUE_SHIFT_24MHZ; 3530 adapter->cc.shift = shift; 3531 break; 3532 case e1000_pch_cnp: 3533 case e1000_pch_tgp: 3534 case e1000_pch_adp: 3535 case e1000_pch_nvp: 3536 if (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI) { 3537 /* Stable 24MHz frequency */ 3538 incperiod = INCPERIOD_24MHZ; 3539 incvalue = INCVALUE_24MHZ; 3540 shift = INCVALUE_SHIFT_24MHZ; 3541 adapter->cc.shift = shift; 3542 } else { 3543 /* Stable 38400KHz frequency */ 3544 incperiod = INCPERIOD_38400KHZ; 3545 incvalue = INCVALUE_38400KHZ; 3546 shift = INCVALUE_SHIFT_38400KHZ; 3547 adapter->cc.shift = shift; 3548 } 3549 break; 3550 case e1000_pch_mtp: 3551 case e1000_pch_lnp: 3552 case e1000_pch_ptp: 3553 /* System firmware can misreport this value, so set it to a 3554 * stable 38400KHz frequency. 3555 */ 3556 incperiod = INCPERIOD_38400KHZ; 3557 incvalue = INCVALUE_38400KHZ; 3558 shift = INCVALUE_SHIFT_38400KHZ; 3559 adapter->cc.shift = shift; 3560 break; 3561 case e1000_82574: 3562 case e1000_82583: 3563 /* Stable 25MHz frequency */ 3564 incperiod = INCPERIOD_25MHZ; 3565 incvalue = INCVALUE_25MHZ; 3566 shift = INCVALUE_SHIFT_25MHZ; 3567 adapter->cc.shift = shift; 3568 break; 3569 default: 3570 return -EINVAL; 3571 } 3572 3573 *timinca = ((incperiod << E1000_TIMINCA_INCPERIOD_SHIFT) | 3574 ((incvalue << shift) & E1000_TIMINCA_INCVALUE_MASK)); 3575 3576 return 0; 3577 } 3578 3579 /** 3580 * e1000e_config_hwtstamp - configure the hwtstamp registers and enable/disable 3581 * @adapter: board private structure 3582 * @config: timestamp configuration 3583 * @extack: netlink extended ACK for error report 3584 * 3585 * Outgoing time stamping can be enabled and disabled. Play nice and 3586 * disable it when requested, although it shouldn't cause any overhead 3587 * when no packet needs it. At most one packet in the queue may be 3588 * marked for time stamping, otherwise it would be impossible to tell 3589 * for sure to which packet the hardware time stamp belongs. 3590 * 3591 * Incoming time stamping has to be configured via the hardware filters. 3592 * Not all combinations are supported, in particular event type has to be 3593 * specified. Matching the kind of event packet is not supported, with the 3594 * exception of "all V2 events regardless of level 2 or 4". 3595 **/ 3596 static int e1000e_config_hwtstamp(struct e1000_adapter *adapter, 3597 struct kernel_hwtstamp_config *config, 3598 struct netlink_ext_ack *extack) 3599 { 3600 struct e1000_hw *hw = &adapter->hw; 3601 u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED; 3602 u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED; 3603 u32 rxmtrl = 0; 3604 u16 rxudp = 0; 3605 bool is_l4 = false; 3606 bool is_l2 = false; 3607 u32 regval; 3608 3609 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP)) { 3610 NL_SET_ERR_MSG(extack, "No HW timestamp support"); 3611 return -EINVAL; 3612 } 3613 3614 switch (config->tx_type) { 3615 case HWTSTAMP_TX_OFF: 3616 tsync_tx_ctl = 0; 3617 break; 3618 case HWTSTAMP_TX_ON: 3619 break; 3620 default: 3621 NL_SET_ERR_MSG(extack, "Unsupported TX HW timestamp type"); 3622 return -ERANGE; 3623 } 3624 3625 switch (config->rx_filter) { 3626 case HWTSTAMP_FILTER_NONE: 3627 tsync_rx_ctl = 0; 3628 break; 3629 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: 3630 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1; 3631 rxmtrl = E1000_RXMTRL_PTP_V1_SYNC_MESSAGE; 3632 is_l4 = true; 3633 break; 3634 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: 3635 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1; 3636 rxmtrl = E1000_RXMTRL_PTP_V1_DELAY_REQ_MESSAGE; 3637 is_l4 = true; 3638 break; 3639 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 3640 /* Also time stamps V2 L2 Path Delay Request/Response */ 3641 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2; 3642 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE; 3643 is_l2 = true; 3644 break; 3645 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 3646 /* Also time stamps V2 L2 Path Delay Request/Response. */ 3647 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2; 3648 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE; 3649 is_l2 = true; 3650 break; 3651 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 3652 /* Hardware cannot filter just V2 L4 Sync messages */ 3653 fallthrough; 3654 case HWTSTAMP_FILTER_PTP_V2_SYNC: 3655 /* Also time stamps V2 Path Delay Request/Response. */ 3656 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2; 3657 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE; 3658 is_l2 = true; 3659 is_l4 = true; 3660 break; 3661 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 3662 /* Hardware cannot filter just V2 L4 Delay Request messages */ 3663 fallthrough; 3664 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 3665 /* Also time stamps V2 Path Delay Request/Response. */ 3666 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2; 3667 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE; 3668 is_l2 = true; 3669 is_l4 = true; 3670 break; 3671 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 3672 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: 3673 /* Hardware cannot filter just V2 L4 or L2 Event messages */ 3674 fallthrough; 3675 case HWTSTAMP_FILTER_PTP_V2_EVENT: 3676 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2; 3677 config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; 3678 is_l2 = true; 3679 is_l4 = true; 3680 break; 3681 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: 3682 /* For V1, the hardware can only filter Sync messages or 3683 * Delay Request messages but not both so fall-through to 3684 * time stamp all packets. 3685 */ 3686 fallthrough; 3687 case HWTSTAMP_FILTER_NTP_ALL: 3688 case HWTSTAMP_FILTER_ALL: 3689 is_l2 = true; 3690 is_l4 = true; 3691 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL; 3692 config->rx_filter = HWTSTAMP_FILTER_ALL; 3693 break; 3694 default: 3695 NL_SET_ERR_MSG(extack, "Unsupported RX HW timestamp filter"); 3696 return -ERANGE; 3697 } 3698 3699 adapter->hwtstamp_config = *config; 3700 3701 /* enable/disable Tx h/w time stamping */ 3702 regval = er32(TSYNCTXCTL); 3703 regval &= ~E1000_TSYNCTXCTL_ENABLED; 3704 regval |= tsync_tx_ctl; 3705 ew32(TSYNCTXCTL, regval); 3706 if ((er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) != 3707 (regval & E1000_TSYNCTXCTL_ENABLED)) { 3708 NL_SET_ERR_MSG(extack, 3709 "Timesync Tx Control register not set as expected"); 3710 return -EAGAIN; 3711 } 3712 3713 /* enable/disable Rx h/w time stamping */ 3714 regval = er32(TSYNCRXCTL); 3715 regval &= ~(E1000_TSYNCRXCTL_ENABLED | E1000_TSYNCRXCTL_TYPE_MASK); 3716 regval |= tsync_rx_ctl; 3717 ew32(TSYNCRXCTL, regval); 3718 if ((er32(TSYNCRXCTL) & (E1000_TSYNCRXCTL_ENABLED | 3719 E1000_TSYNCRXCTL_TYPE_MASK)) != 3720 (regval & (E1000_TSYNCRXCTL_ENABLED | 3721 E1000_TSYNCRXCTL_TYPE_MASK))) { 3722 NL_SET_ERR_MSG(extack, 3723 "Timesync Rx Control register not set as expected"); 3724 return -EAGAIN; 3725 } 3726 3727 /* L2: define ethertype filter for time stamped packets */ 3728 if (is_l2) 3729 rxmtrl |= ETH_P_1588; 3730 3731 /* define which PTP packets get time stamped */ 3732 ew32(RXMTRL, rxmtrl); 3733 3734 /* Filter by destination port */ 3735 if (is_l4) { 3736 rxudp = PTP_EV_PORT; 3737 cpu_to_be16s(&rxudp); 3738 } 3739 ew32(RXUDP, rxudp); 3740 3741 e1e_flush(); 3742 3743 /* Clear TSYNCRXCTL_VALID & TSYNCTXCTL_VALID bit */ 3744 er32(RXSTMPH); 3745 er32(TXSTMPH); 3746 3747 return 0; 3748 } 3749 3750 /** 3751 * e1000_configure - configure the hardware for Rx and Tx 3752 * @adapter: private board structure 3753 **/ 3754 static void e1000_configure(struct e1000_adapter *adapter) 3755 { 3756 struct e1000_ring *rx_ring = adapter->rx_ring; 3757 3758 e1000e_set_rx_mode(adapter->netdev); 3759 3760 e1000_restore_vlan(adapter); 3761 e1000_init_manageability_pt(adapter); 3762 3763 e1000_configure_tx(adapter); 3764 3765 if (adapter->netdev->features & NETIF_F_RXHASH) 3766 e1000e_setup_rss_hash(adapter); 3767 e1000_setup_rctl(adapter); 3768 e1000_configure_rx(adapter); 3769 adapter->alloc_rx_buf(rx_ring, e1000_desc_unused(rx_ring), GFP_KERNEL); 3770 } 3771 3772 /** 3773 * e1000e_power_up_phy - restore link in case the phy was powered down 3774 * @adapter: address of board private structure 3775 * 3776 * The phy may be powered down to save power and turn off link when the 3777 * driver is unloaded and wake on lan is not enabled (among others) 3778 * *** this routine MUST be followed by a call to e1000e_reset *** 3779 **/ 3780 void e1000e_power_up_phy(struct e1000_adapter *adapter) 3781 { 3782 if (adapter->hw.phy.ops.power_up) 3783 adapter->hw.phy.ops.power_up(&adapter->hw); 3784 3785 adapter->hw.mac.ops.setup_link(&adapter->hw); 3786 } 3787 3788 /** 3789 * e1000_power_down_phy - Power down the PHY 3790 * @adapter: board private structure 3791 * 3792 * Power down the PHY so no link is implied when interface is down. 3793 * The PHY cannot be powered down if management or WoL is active. 3794 */ 3795 static void e1000_power_down_phy(struct e1000_adapter *adapter) 3796 { 3797 if (adapter->hw.phy.ops.power_down) 3798 adapter->hw.phy.ops.power_down(&adapter->hw); 3799 } 3800 3801 /** 3802 * e1000_flush_tx_ring - remove all descriptors from the tx_ring 3803 * @adapter: board private structure 3804 * 3805 * We want to clear all pending descriptors from the TX ring. 3806 * zeroing happens when the HW reads the regs. We assign the ring itself as 3807 * the data of the next descriptor. We don't care about the data we are about 3808 * to reset the HW. 3809 */ 3810 static void e1000_flush_tx_ring(struct e1000_adapter *adapter) 3811 { 3812 struct e1000_hw *hw = &adapter->hw; 3813 struct e1000_ring *tx_ring = adapter->tx_ring; 3814 struct e1000_tx_desc *tx_desc = NULL; 3815 u32 tdt, tctl, txd_lower = E1000_TXD_CMD_IFCS; 3816 u16 size = 512; 3817 3818 tctl = er32(TCTL); 3819 ew32(TCTL, tctl | E1000_TCTL_EN); 3820 tdt = er32(TDT(0)); 3821 BUG_ON(tdt != tx_ring->next_to_use); 3822 tx_desc = E1000_TX_DESC(*tx_ring, tx_ring->next_to_use); 3823 tx_desc->buffer_addr = cpu_to_le64(tx_ring->dma); 3824 3825 tx_desc->lower.data = cpu_to_le32(txd_lower | size); 3826 tx_desc->upper.data = 0; 3827 /* flush descriptors to memory before notifying the HW */ 3828 wmb(); 3829 tx_ring->next_to_use++; 3830 if (tx_ring->next_to_use == tx_ring->count) 3831 tx_ring->next_to_use = 0; 3832 ew32(TDT(0), tx_ring->next_to_use); 3833 usleep_range(200, 250); 3834 } 3835 3836 /** 3837 * e1000_flush_rx_ring - remove all descriptors from the rx_ring 3838 * @adapter: board private structure 3839 * 3840 * Mark all descriptors in the RX ring as consumed and disable the rx ring 3841 */ 3842 static void e1000_flush_rx_ring(struct e1000_adapter *adapter) 3843 { 3844 u32 rctl, rxdctl; 3845 struct e1000_hw *hw = &adapter->hw; 3846 3847 rctl = er32(RCTL); 3848 ew32(RCTL, rctl & ~E1000_RCTL_EN); 3849 e1e_flush(); 3850 usleep_range(100, 150); 3851 3852 rxdctl = er32(RXDCTL(0)); 3853 /* zero the lower 14 bits (prefetch and host thresholds) */ 3854 rxdctl &= 0xffffc000; 3855 3856 /* update thresholds: prefetch threshold to 31, host threshold to 1 3857 * and make sure the granularity is "descriptors" and not "cache lines" 3858 */ 3859 rxdctl |= (0x1F | BIT(8) | E1000_RXDCTL_THRESH_UNIT_DESC); 3860 3861 ew32(RXDCTL(0), rxdctl); 3862 /* momentarily enable the RX ring for the changes to take effect */ 3863 ew32(RCTL, rctl | E1000_RCTL_EN); 3864 e1e_flush(); 3865 usleep_range(100, 150); 3866 ew32(RCTL, rctl & ~E1000_RCTL_EN); 3867 } 3868 3869 /** 3870 * e1000_flush_desc_rings - remove all descriptors from the descriptor rings 3871 * @adapter: board private structure 3872 * 3873 * In i219, the descriptor rings must be emptied before resetting the HW 3874 * or before changing the device state to D3 during runtime (runtime PM). 3875 * 3876 * Failure to do this will cause the HW to enter a unit hang state which can 3877 * only be released by PCI reset on the device 3878 * 3879 */ 3880 3881 static void e1000_flush_desc_rings(struct e1000_adapter *adapter) 3882 { 3883 u16 hang_state; 3884 u32 fext_nvm11, tdlen; 3885 struct e1000_hw *hw = &adapter->hw; 3886 3887 /* First, disable MULR fix in FEXTNVM11 */ 3888 fext_nvm11 = er32(FEXTNVM11); 3889 fext_nvm11 |= E1000_FEXTNVM11_DISABLE_MULR_FIX; 3890 ew32(FEXTNVM11, fext_nvm11); 3891 /* do nothing if we're not in faulty state, or if the queue is empty */ 3892 tdlen = er32(TDLEN(0)); 3893 pci_read_config_word(adapter->pdev, PCICFG_DESC_RING_STATUS, 3894 &hang_state); 3895 if (!(hang_state & FLUSH_DESC_REQUIRED) || !tdlen) 3896 return; 3897 e1000_flush_tx_ring(adapter); 3898 /* recheck, maybe the fault is caused by the rx ring */ 3899 pci_read_config_word(adapter->pdev, PCICFG_DESC_RING_STATUS, 3900 &hang_state); 3901 if (hang_state & FLUSH_DESC_REQUIRED) 3902 e1000_flush_rx_ring(adapter); 3903 } 3904 3905 /** 3906 * e1000e_systim_reset - reset the timesync registers after a hardware reset 3907 * @adapter: board private structure 3908 * 3909 * When the MAC is reset, all hardware bits for timesync will be reset to the 3910 * default values. This function will restore the settings last in place. 3911 * Since the clock SYSTIME registers are reset, we will simply restore the 3912 * cyclecounter to the kernel real clock time. 3913 **/ 3914 static void e1000e_systim_reset(struct e1000_adapter *adapter) 3915 { 3916 struct ptp_clock_info *info = &adapter->ptp_clock_info; 3917 struct e1000_hw *hw = &adapter->hw; 3918 struct netlink_ext_ack extack = {}; 3919 unsigned long flags; 3920 u32 timinca; 3921 s32 ret_val; 3922 3923 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP)) 3924 return; 3925 3926 if (info->adjfine) { 3927 /* restore the previous ptp frequency delta */ 3928 ret_val = info->adjfine(info, adapter->ptp_delta); 3929 } else { 3930 /* set the default base frequency if no adjustment possible */ 3931 ret_val = e1000e_get_base_timinca(adapter, &timinca); 3932 if (!ret_val) 3933 ew32(TIMINCA, timinca); 3934 } 3935 3936 if (ret_val) { 3937 dev_warn(&adapter->pdev->dev, 3938 "Failed to restore TIMINCA clock rate delta: %d\n", 3939 ret_val); 3940 return; 3941 } 3942 3943 /* reset the systim ns time counter */ 3944 spin_lock_irqsave(&adapter->systim_lock, flags); 3945 timecounter_init(&adapter->tc, &adapter->cc, 3946 ktime_to_ns(ktime_get_real())); 3947 spin_unlock_irqrestore(&adapter->systim_lock, flags); 3948 3949 /* restore the previous hwtstamp configuration settings */ 3950 ret_val = e1000e_config_hwtstamp(adapter, &adapter->hwtstamp_config, 3951 &extack); 3952 if (ret_val) { 3953 if (extack._msg) 3954 e_err("%s\n", extack._msg); 3955 } 3956 } 3957 3958 /** 3959 * e1000e_reset - bring the hardware into a known good state 3960 * @adapter: board private structure 3961 * 3962 * This function boots the hardware and enables some settings that 3963 * require a configuration cycle of the hardware - those cannot be 3964 * set/changed during runtime. After reset the device needs to be 3965 * properly configured for Rx, Tx etc. 3966 */ 3967 void e1000e_reset(struct e1000_adapter *adapter) 3968 { 3969 struct e1000_mac_info *mac = &adapter->hw.mac; 3970 struct e1000_fc_info *fc = &adapter->hw.fc; 3971 struct e1000_hw *hw = &adapter->hw; 3972 u32 tx_space, min_tx_space, min_rx_space; 3973 u32 pba = adapter->pba; 3974 u16 hwm; 3975 3976 /* reset Packet Buffer Allocation to default */ 3977 ew32(PBA, pba); 3978 3979 if (adapter->max_frame_size > (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)) { 3980 /* To maintain wire speed transmits, the Tx FIFO should be 3981 * large enough to accommodate two full transmit packets, 3982 * rounded up to the next 1KB and expressed in KB. Likewise, 3983 * the Rx FIFO should be large enough to accommodate at least 3984 * one full receive packet and is similarly rounded up and 3985 * expressed in KB. 3986 */ 3987 pba = er32(PBA); 3988 /* upper 16 bits has Tx packet buffer allocation size in KB */ 3989 tx_space = pba >> 16; 3990 /* lower 16 bits has Rx packet buffer allocation size in KB */ 3991 pba &= 0xffff; 3992 /* the Tx fifo also stores 16 bytes of information about the Tx 3993 * but don't include ethernet FCS because hardware appends it 3994 */ 3995 min_tx_space = (adapter->max_frame_size + 3996 sizeof(struct e1000_tx_desc) - ETH_FCS_LEN) * 2; 3997 min_tx_space = ALIGN(min_tx_space, 1024); 3998 min_tx_space >>= 10; 3999 /* software strips receive CRC, so leave room for it */ 4000 min_rx_space = adapter->max_frame_size; 4001 min_rx_space = ALIGN(min_rx_space, 1024); 4002 min_rx_space >>= 10; 4003 4004 /* If current Tx allocation is less than the min Tx FIFO size, 4005 * and the min Tx FIFO size is less than the current Rx FIFO 4006 * allocation, take space away from current Rx allocation 4007 */ 4008 if ((tx_space < min_tx_space) && 4009 ((min_tx_space - tx_space) < pba)) { 4010 pba -= min_tx_space - tx_space; 4011 4012 /* if short on Rx space, Rx wins and must trump Tx 4013 * adjustment 4014 */ 4015 if (pba < min_rx_space) 4016 pba = min_rx_space; 4017 } 4018 4019 ew32(PBA, pba); 4020 } 4021 4022 /* flow control settings 4023 * 4024 * The high water mark must be low enough to fit one full frame 4025 * (or the size used for early receive) above it in the Rx FIFO. 4026 * Set it to the lower of: 4027 * - 90% of the Rx FIFO size, and 4028 * - the full Rx FIFO size minus one full frame 4029 */ 4030 if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME) 4031 fc->pause_time = 0xFFFF; 4032 else 4033 fc->pause_time = E1000_FC_PAUSE_TIME; 4034 fc->send_xon = true; 4035 fc->current_mode = fc->requested_mode; 4036 4037 switch (hw->mac.type) { 4038 case e1000_ich9lan: 4039 case e1000_ich10lan: 4040 if (adapter->netdev->mtu > ETH_DATA_LEN) { 4041 pba = 14; 4042 ew32(PBA, pba); 4043 fc->high_water = 0x2800; 4044 fc->low_water = fc->high_water - 8; 4045 break; 4046 } 4047 fallthrough; 4048 default: 4049 hwm = min(((pba << 10) * 9 / 10), 4050 ((pba << 10) - adapter->max_frame_size)); 4051 4052 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */ 4053 fc->low_water = fc->high_water - 8; 4054 break; 4055 case e1000_pchlan: 4056 /* Workaround PCH LOM adapter hangs with certain network 4057 * loads. If hangs persist, try disabling Tx flow control. 4058 */ 4059 if (adapter->netdev->mtu > ETH_DATA_LEN) { 4060 fc->high_water = 0x3500; 4061 fc->low_water = 0x1500; 4062 } else { 4063 fc->high_water = 0x5000; 4064 fc->low_water = 0x3000; 4065 } 4066 fc->refresh_time = 0x1000; 4067 break; 4068 case e1000_pch2lan: 4069 case e1000_pch_lpt: 4070 case e1000_pch_spt: 4071 case e1000_pch_cnp: 4072 case e1000_pch_tgp: 4073 case e1000_pch_adp: 4074 case e1000_pch_mtp: 4075 case e1000_pch_lnp: 4076 case e1000_pch_ptp: 4077 case e1000_pch_nvp: 4078 fc->refresh_time = 0xFFFF; 4079 fc->pause_time = 0xFFFF; 4080 4081 if (adapter->netdev->mtu <= ETH_DATA_LEN) { 4082 fc->high_water = 0x05C20; 4083 fc->low_water = 0x05048; 4084 break; 4085 } 4086 4087 pba = 14; 4088 ew32(PBA, pba); 4089 fc->high_water = ((pba << 10) * 9 / 10) & E1000_FCRTH_RTH; 4090 fc->low_water = ((pba << 10) * 8 / 10) & E1000_FCRTL_RTL; 4091 break; 4092 } 4093 4094 /* Alignment of Tx data is on an arbitrary byte boundary with the 4095 * maximum size per Tx descriptor limited only to the transmit 4096 * allocation of the packet buffer minus 96 bytes with an upper 4097 * limit of 24KB due to receive synchronization limitations. 4098 */ 4099 adapter->tx_fifo_limit = min_t(u32, ((er32(PBA) >> 16) << 10) - 96, 4100 24 << 10); 4101 4102 /* Disable Adaptive Interrupt Moderation if 2 full packets cannot 4103 * fit in receive buffer. 4104 */ 4105 if (adapter->itr_setting & 0x3) { 4106 if ((adapter->max_frame_size * 2) > (pba << 10)) { 4107 if (!(adapter->flags2 & FLAG2_DISABLE_AIM)) { 4108 dev_info(&adapter->pdev->dev, 4109 "Interrupt Throttle Rate off\n"); 4110 adapter->flags2 |= FLAG2_DISABLE_AIM; 4111 e1000e_write_itr(adapter, 0); 4112 } 4113 } else if (adapter->flags2 & FLAG2_DISABLE_AIM) { 4114 dev_info(&adapter->pdev->dev, 4115 "Interrupt Throttle Rate on\n"); 4116 adapter->flags2 &= ~FLAG2_DISABLE_AIM; 4117 adapter->itr = 20000; 4118 e1000e_write_itr(adapter, adapter->itr); 4119 } 4120 } 4121 4122 if (hw->mac.type >= e1000_pch_spt) 4123 e1000_flush_desc_rings(adapter); 4124 /* Allow time for pending master requests to run */ 4125 mac->ops.reset_hw(hw); 4126 4127 /* For parts with AMT enabled, let the firmware know 4128 * that the network interface is in control 4129 */ 4130 if (adapter->flags & FLAG_HAS_AMT) 4131 e1000e_get_hw_control(adapter); 4132 4133 ew32(WUC, 0); 4134 4135 if (mac->ops.init_hw(hw)) 4136 e_err("Hardware Error\n"); 4137 4138 e1000_update_mng_vlan(adapter); 4139 4140 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ 4141 ew32(VET, ETH_P_8021Q); 4142 4143 e1000e_reset_adaptive(hw); 4144 4145 /* restore systim and hwtstamp settings */ 4146 e1000e_systim_reset(adapter); 4147 4148 /* Set EEE advertisement as appropriate */ 4149 if (adapter->flags2 & FLAG2_HAS_EEE) { 4150 s32 ret_val; 4151 u16 adv_addr; 4152 4153 switch (hw->phy.type) { 4154 case e1000_phy_82579: 4155 adv_addr = I82579_EEE_ADVERTISEMENT; 4156 break; 4157 case e1000_phy_i217: 4158 adv_addr = I217_EEE_ADVERTISEMENT; 4159 break; 4160 default: 4161 dev_err(&adapter->pdev->dev, 4162 "Invalid PHY type setting EEE advertisement\n"); 4163 return; 4164 } 4165 4166 ret_val = hw->phy.ops.acquire(hw); 4167 if (ret_val) { 4168 dev_err(&adapter->pdev->dev, 4169 "EEE advertisement - unable to acquire PHY\n"); 4170 return; 4171 } 4172 4173 e1000_write_emi_reg_locked(hw, adv_addr, 4174 hw->dev_spec.ich8lan.eee_disable ? 4175 0 : adapter->eee_advert); 4176 4177 hw->phy.ops.release(hw); 4178 } 4179 4180 if (!netif_running(adapter->netdev) && 4181 !test_bit(__E1000_TESTING, &adapter->state)) 4182 e1000_power_down_phy(adapter); 4183 4184 e1000_get_phy_info(hw); 4185 4186 if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) && 4187 !(adapter->flags & FLAG_SMART_POWER_DOWN)) { 4188 u16 phy_data = 0; 4189 /* speed up time to link by disabling smart power down, ignore 4190 * the return value of this function because there is nothing 4191 * different we would do if it failed 4192 */ 4193 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data); 4194 phy_data &= ~IGP02E1000_PM_SPD; 4195 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data); 4196 } 4197 if (hw->mac.type >= e1000_pch_spt && adapter->int_mode == 0) { 4198 u32 reg; 4199 4200 /* Fextnvm7 @ 0xe4[2] = 1 */ 4201 reg = er32(FEXTNVM7); 4202 reg |= E1000_FEXTNVM7_SIDE_CLK_UNGATE; 4203 ew32(FEXTNVM7, reg); 4204 /* Fextnvm9 @ 0x5bb4[13:12] = 11 */ 4205 reg = er32(FEXTNVM9); 4206 reg |= E1000_FEXTNVM9_IOSFSB_CLKGATE_DIS | 4207 E1000_FEXTNVM9_IOSFSB_CLKREQ_DIS; 4208 ew32(FEXTNVM9, reg); 4209 } 4210 4211 } 4212 4213 /** 4214 * e1000e_trigger_lsc - trigger an LSC interrupt 4215 * @adapter: board private structure 4216 * 4217 * Fire a link status change interrupt to start the watchdog. 4218 **/ 4219 static void e1000e_trigger_lsc(struct e1000_adapter *adapter) 4220 { 4221 struct e1000_hw *hw = &adapter->hw; 4222 4223 if (adapter->msix_entries) 4224 ew32(ICS, E1000_ICS_LSC | E1000_ICS_OTHER); 4225 else 4226 ew32(ICS, E1000_ICS_LSC); 4227 } 4228 4229 void e1000e_up(struct e1000_adapter *adapter) 4230 { 4231 /* hardware has been reset, we need to reload some things */ 4232 e1000_configure(adapter); 4233 4234 clear_bit(__E1000_DOWN, &adapter->state); 4235 4236 if (adapter->msix_entries) 4237 e1000_configure_msix(adapter); 4238 e1000_irq_enable(adapter); 4239 4240 /* Tx queue started by watchdog timer when link is up */ 4241 4242 e1000e_trigger_lsc(adapter); 4243 } 4244 4245 static void e1000e_flush_descriptors(struct e1000_adapter *adapter) 4246 { 4247 struct e1000_hw *hw = &adapter->hw; 4248 4249 if (!(adapter->flags2 & FLAG2_DMA_BURST)) 4250 return; 4251 4252 /* flush pending descriptor writebacks to memory */ 4253 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 4254 ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD); 4255 4256 /* execute the writes immediately */ 4257 e1e_flush(); 4258 4259 /* due to rare timing issues, write to TIDV/RDTR again to ensure the 4260 * write is successful 4261 */ 4262 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 4263 ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD); 4264 4265 /* execute the writes immediately */ 4266 e1e_flush(); 4267 } 4268 4269 static void e1000e_update_stats(struct e1000_adapter *adapter); 4270 4271 /** 4272 * e1000e_down - quiesce the device and optionally reset the hardware 4273 * @adapter: board private structure 4274 * @reset: boolean flag to reset the hardware or not 4275 */ 4276 void e1000e_down(struct e1000_adapter *adapter, bool reset) 4277 { 4278 struct net_device *netdev = adapter->netdev; 4279 struct e1000_hw *hw = &adapter->hw; 4280 u32 tctl, rctl; 4281 4282 /* signal that we're down so the interrupt handler does not 4283 * reschedule our watchdog timer 4284 */ 4285 set_bit(__E1000_DOWN, &adapter->state); 4286 4287 netif_carrier_off(netdev); 4288 4289 /* disable receives in the hardware */ 4290 rctl = er32(RCTL); 4291 if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX)) 4292 ew32(RCTL, rctl & ~E1000_RCTL_EN); 4293 /* flush and sleep below */ 4294 4295 netif_stop_queue(netdev); 4296 4297 /* disable transmits in the hardware */ 4298 tctl = er32(TCTL); 4299 tctl &= ~E1000_TCTL_EN; 4300 ew32(TCTL, tctl); 4301 4302 /* flush both disables and wait for them to finish */ 4303 e1e_flush(); 4304 usleep_range(10000, 11000); 4305 4306 e1000_irq_disable(adapter); 4307 4308 napi_synchronize(&adapter->napi); 4309 4310 timer_delete_sync(&adapter->watchdog_timer); 4311 timer_delete_sync(&adapter->phy_info_timer); 4312 4313 spin_lock(&adapter->stats64_lock); 4314 e1000e_update_stats(adapter); 4315 spin_unlock(&adapter->stats64_lock); 4316 4317 e1000e_flush_descriptors(adapter); 4318 4319 adapter->link_speed = 0; 4320 adapter->link_duplex = 0; 4321 4322 /* Disable Si errata workaround on PCHx for jumbo frame flow */ 4323 if ((hw->mac.type >= e1000_pch2lan) && 4324 (adapter->netdev->mtu > ETH_DATA_LEN) && 4325 e1000_lv_jumbo_workaround_ich8lan(hw, false)) 4326 e_dbg("failed to disable jumbo frame workaround mode\n"); 4327 4328 if (!pci_channel_offline(adapter->pdev)) { 4329 if (reset) 4330 e1000e_reset(adapter); 4331 else if (hw->mac.type >= e1000_pch_spt) 4332 e1000_flush_desc_rings(adapter); 4333 } 4334 e1000_clean_tx_ring(adapter->tx_ring); 4335 e1000_clean_rx_ring(adapter->rx_ring); 4336 } 4337 4338 void e1000e_reinit_locked(struct e1000_adapter *adapter) 4339 { 4340 might_sleep(); 4341 while (test_and_set_bit(__E1000_RESETTING, &adapter->state)) 4342 usleep_range(1000, 1100); 4343 e1000e_down(adapter, true); 4344 e1000e_up(adapter); 4345 clear_bit(__E1000_RESETTING, &adapter->state); 4346 } 4347 4348 /** 4349 * e1000e_sanitize_systim - sanitize raw cycle counter reads 4350 * @hw: pointer to the HW structure 4351 * @systim: PHC time value read, sanitized and returned 4352 * @sts: structure to hold system time before and after reading SYSTIML, 4353 * may be NULL 4354 * 4355 * Errata for 82574/82583 possible bad bits read from SYSTIMH/L: 4356 * check to see that the time is incrementing at a reasonable 4357 * rate and is a multiple of incvalue. 4358 **/ 4359 static u64 e1000e_sanitize_systim(struct e1000_hw *hw, u64 systim, 4360 struct ptp_system_timestamp *sts) 4361 { 4362 u64 time_delta, rem, temp; 4363 u64 systim_next; 4364 u32 incvalue; 4365 int i; 4366 4367 incvalue = er32(TIMINCA) & E1000_TIMINCA_INCVALUE_MASK; 4368 for (i = 0; i < E1000_MAX_82574_SYSTIM_REREADS; i++) { 4369 /* latch SYSTIMH on read of SYSTIML */ 4370 ptp_read_system_prets(sts); 4371 systim_next = (u64)er32(SYSTIML); 4372 ptp_read_system_postts(sts); 4373 systim_next |= (u64)er32(SYSTIMH) << 32; 4374 4375 time_delta = systim_next - systim; 4376 temp = time_delta; 4377 /* VMWare users have seen incvalue of zero, don't div / 0 */ 4378 rem = incvalue ? do_div(temp, incvalue) : (time_delta != 0); 4379 4380 systim = systim_next; 4381 4382 if ((time_delta < E1000_82574_SYSTIM_EPSILON) && (rem == 0)) 4383 break; 4384 } 4385 4386 return systim; 4387 } 4388 4389 /** 4390 * e1000e_read_systim - read SYSTIM register 4391 * @adapter: board private structure 4392 * @sts: structure which will contain system time before and after reading 4393 * SYSTIML, may be NULL 4394 **/ 4395 u64 e1000e_read_systim(struct e1000_adapter *adapter, 4396 struct ptp_system_timestamp *sts) 4397 { 4398 struct e1000_hw *hw = &adapter->hw; 4399 u32 systimel, systimel_2, systimeh; 4400 u64 systim; 4401 /* SYSTIMH latching upon SYSTIML read does not work well. 4402 * This means that if SYSTIML overflows after we read it but before 4403 * we read SYSTIMH, the value of SYSTIMH has been incremented and we 4404 * will experience a huge non linear increment in the systime value 4405 * to fix that we test for overflow and if true, we re-read systime. 4406 */ 4407 ptp_read_system_prets(sts); 4408 systimel = er32(SYSTIML); 4409 ptp_read_system_postts(sts); 4410 systimeh = er32(SYSTIMH); 4411 /* Is systimel is so large that overflow is possible? */ 4412 if (systimel >= (u32)0xffffffff - E1000_TIMINCA_INCVALUE_MASK) { 4413 ptp_read_system_prets(sts); 4414 systimel_2 = er32(SYSTIML); 4415 ptp_read_system_postts(sts); 4416 if (systimel > systimel_2) { 4417 /* There was an overflow, read again SYSTIMH, and use 4418 * systimel_2 4419 */ 4420 systimeh = er32(SYSTIMH); 4421 systimel = systimel_2; 4422 } 4423 } 4424 systim = (u64)systimel; 4425 systim |= (u64)systimeh << 32; 4426 4427 if (adapter->flags2 & FLAG2_CHECK_SYSTIM_OVERFLOW) 4428 systim = e1000e_sanitize_systim(hw, systim, sts); 4429 4430 return systim; 4431 } 4432 4433 /** 4434 * e1000e_cyclecounter_read - read raw cycle counter (used by time counter) 4435 * @cc: cyclecounter structure 4436 **/ 4437 static u64 e1000e_cyclecounter_read(struct cyclecounter *cc) 4438 { 4439 struct e1000_adapter *adapter = container_of(cc, struct e1000_adapter, 4440 cc); 4441 4442 return e1000e_read_systim(adapter, NULL); 4443 } 4444 4445 /** 4446 * e1000_sw_init - Initialize general software structures (struct e1000_adapter) 4447 * @adapter: board private structure to initialize 4448 * 4449 * e1000_sw_init initializes the Adapter private data structure. 4450 * Fields are initialized based on PCI device information and 4451 * OS network device settings (MTU size). 4452 **/ 4453 static int e1000_sw_init(struct e1000_adapter *adapter) 4454 { 4455 struct net_device *netdev = adapter->netdev; 4456 4457 adapter->rx_buffer_len = VLAN_ETH_FRAME_LEN + ETH_FCS_LEN; 4458 adapter->rx_ps_bsize0 = 128; 4459 adapter->max_frame_size = netdev->mtu + VLAN_ETH_HLEN + ETH_FCS_LEN; 4460 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; 4461 adapter->tx_ring_count = E1000_DEFAULT_TXD; 4462 adapter->rx_ring_count = E1000_DEFAULT_RXD; 4463 4464 spin_lock_init(&adapter->stats64_lock); 4465 4466 e1000e_set_interrupt_capability(adapter); 4467 4468 if (e1000_alloc_queues(adapter)) 4469 return -ENOMEM; 4470 4471 /* Setup hardware time stamping cyclecounter */ 4472 if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) { 4473 adapter->cc.read = e1000e_cyclecounter_read; 4474 adapter->cc.mask = CYCLECOUNTER_MASK(64); 4475 adapter->cc.mult = 1; 4476 /* cc.shift set in e1000e_get_base_tininca() */ 4477 4478 spin_lock_init(&adapter->systim_lock); 4479 INIT_WORK(&adapter->tx_hwtstamp_work, e1000e_tx_hwtstamp_work); 4480 } 4481 4482 /* Explicitly disable IRQ since the NIC can be in any state. */ 4483 e1000_irq_disable(adapter); 4484 4485 set_bit(__E1000_DOWN, &adapter->state); 4486 return 0; 4487 } 4488 4489 /** 4490 * e1000_intr_msi_test - Interrupt Handler 4491 * @irq: interrupt number 4492 * @data: pointer to a network interface device structure 4493 **/ 4494 static irqreturn_t e1000_intr_msi_test(int __always_unused irq, void *data) 4495 { 4496 struct net_device *netdev = data; 4497 struct e1000_adapter *adapter = netdev_priv(netdev); 4498 struct e1000_hw *hw = &adapter->hw; 4499 u32 icr = er32(ICR); 4500 4501 e_dbg("icr is %08X\n", icr); 4502 if (icr & E1000_ICR_RXSEQ) { 4503 adapter->flags &= ~FLAG_MSI_TEST_FAILED; 4504 /* Force memory writes to complete before acknowledging the 4505 * interrupt is handled. 4506 */ 4507 wmb(); 4508 } 4509 4510 return IRQ_HANDLED; 4511 } 4512 4513 /** 4514 * e1000_test_msi_interrupt - Returns 0 for successful test 4515 * @adapter: board private struct 4516 * 4517 * code flow taken from tg3.c 4518 **/ 4519 static int e1000_test_msi_interrupt(struct e1000_adapter *adapter) 4520 { 4521 struct net_device *netdev = adapter->netdev; 4522 struct e1000_hw *hw = &adapter->hw; 4523 int err; 4524 4525 /* poll_enable hasn't been called yet, so don't need disable */ 4526 /* clear any pending events */ 4527 er32(ICR); 4528 4529 /* free the real vector and request a test handler */ 4530 e1000_free_irq(adapter); 4531 e1000e_reset_interrupt_capability(adapter); 4532 4533 /* Assume that the test fails, if it succeeds then the test 4534 * MSI irq handler will unset this flag 4535 */ 4536 adapter->flags |= FLAG_MSI_TEST_FAILED; 4537 4538 err = pci_enable_msi(adapter->pdev); 4539 if (err) 4540 goto msi_test_failed; 4541 4542 err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0, 4543 netdev->name, netdev); 4544 if (err) { 4545 pci_disable_msi(adapter->pdev); 4546 goto msi_test_failed; 4547 } 4548 4549 /* Force memory writes to complete before enabling and firing an 4550 * interrupt. 4551 */ 4552 wmb(); 4553 4554 e1000_irq_enable(adapter); 4555 4556 /* fire an unusual interrupt on the test handler */ 4557 ew32(ICS, E1000_ICS_RXSEQ); 4558 e1e_flush(); 4559 msleep(100); 4560 4561 e1000_irq_disable(adapter); 4562 4563 rmb(); /* read flags after interrupt has been fired */ 4564 4565 if (adapter->flags & FLAG_MSI_TEST_FAILED) { 4566 adapter->int_mode = E1000E_INT_MODE_LEGACY; 4567 e_info("MSI interrupt test failed, using legacy interrupt.\n"); 4568 } else { 4569 e_dbg("MSI interrupt test succeeded!\n"); 4570 } 4571 4572 free_irq(adapter->pdev->irq, netdev); 4573 pci_disable_msi(adapter->pdev); 4574 4575 msi_test_failed: 4576 e1000e_set_interrupt_capability(adapter); 4577 return e1000_request_irq(adapter); 4578 } 4579 4580 /** 4581 * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored 4582 * @adapter: board private struct 4583 * 4584 * code flow taken from tg3.c, called with e1000 interrupts disabled. 4585 **/ 4586 static int e1000_test_msi(struct e1000_adapter *adapter) 4587 { 4588 int err; 4589 u16 pci_cmd; 4590 4591 if (!(adapter->flags & FLAG_MSI_ENABLED)) 4592 return 0; 4593 4594 /* disable SERR in case the MSI write causes a master abort */ 4595 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd); 4596 if (pci_cmd & PCI_COMMAND_SERR) 4597 pci_write_config_word(adapter->pdev, PCI_COMMAND, 4598 pci_cmd & ~PCI_COMMAND_SERR); 4599 4600 err = e1000_test_msi_interrupt(adapter); 4601 4602 /* re-enable SERR */ 4603 if (pci_cmd & PCI_COMMAND_SERR) { 4604 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd); 4605 pci_cmd |= PCI_COMMAND_SERR; 4606 pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd); 4607 } 4608 4609 return err; 4610 } 4611 4612 /** 4613 * e1000e_open - Called when a network interface is made active 4614 * @netdev: network interface device structure 4615 * 4616 * Returns 0 on success, negative value on failure 4617 * 4618 * The open entry point is called when a network interface is made 4619 * active by the system (IFF_UP). At this point all resources needed 4620 * for transmit and receive operations are allocated, the interrupt 4621 * handler is registered with the OS, the watchdog timer is started, 4622 * and the stack is notified that the interface is ready. 4623 **/ 4624 int e1000e_open(struct net_device *netdev) 4625 { 4626 struct e1000_adapter *adapter = netdev_priv(netdev); 4627 struct e1000_hw *hw = &adapter->hw; 4628 struct pci_dev *pdev = adapter->pdev; 4629 int err; 4630 int irq; 4631 4632 /* disallow open during test */ 4633 if (test_bit(__E1000_TESTING, &adapter->state)) 4634 return -EBUSY; 4635 4636 pm_runtime_get_sync(&pdev->dev); 4637 4638 netif_carrier_off(netdev); 4639 netif_stop_queue(netdev); 4640 4641 /* allocate transmit descriptors */ 4642 err = e1000e_setup_tx_resources(adapter->tx_ring); 4643 if (err) 4644 goto err_setup_tx; 4645 4646 /* allocate receive descriptors */ 4647 err = e1000e_setup_rx_resources(adapter->rx_ring); 4648 if (err) 4649 goto err_setup_rx; 4650 4651 /* If AMT is enabled, let the firmware know that the network 4652 * interface is now open and reset the part to a known state. 4653 */ 4654 if (adapter->flags & FLAG_HAS_AMT) { 4655 e1000e_get_hw_control(adapter); 4656 e1000e_reset(adapter); 4657 } 4658 4659 e1000e_power_up_phy(adapter); 4660 4661 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; 4662 if ((adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN)) 4663 e1000_update_mng_vlan(adapter); 4664 4665 /* DMA latency requirement to workaround jumbo issue */ 4666 cpu_latency_qos_add_request(&adapter->pm_qos_req, PM_QOS_DEFAULT_VALUE); 4667 4668 /* before we allocate an interrupt, we must be ready to handle it. 4669 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt 4670 * as soon as we call pci_request_irq, so we have to setup our 4671 * clean_rx handler before we do so. 4672 */ 4673 e1000_configure(adapter); 4674 4675 err = e1000_request_irq(adapter); 4676 if (err) 4677 goto err_req_irq; 4678 4679 /* Work around PCIe errata with MSI interrupts causing some chipsets to 4680 * ignore e1000e MSI messages, which means we need to test our MSI 4681 * interrupt now 4682 */ 4683 if (adapter->int_mode != E1000E_INT_MODE_LEGACY) { 4684 err = e1000_test_msi(adapter); 4685 if (err) { 4686 e_err("Interrupt allocation failed\n"); 4687 goto err_req_irq; 4688 } 4689 } 4690 4691 /* From here on the code is the same as e1000e_up() */ 4692 clear_bit(__E1000_DOWN, &adapter->state); 4693 4694 if (adapter->int_mode == E1000E_INT_MODE_MSIX) 4695 irq = adapter->msix_entries[0].vector; 4696 else 4697 irq = adapter->pdev->irq; 4698 4699 netif_napi_set_irq(&adapter->napi, irq); 4700 napi_enable(&adapter->napi); 4701 netif_queue_set_napi(netdev, 0, NETDEV_QUEUE_TYPE_RX, &adapter->napi); 4702 netif_queue_set_napi(netdev, 0, NETDEV_QUEUE_TYPE_TX, &adapter->napi); 4703 4704 e1000_irq_enable(adapter); 4705 4706 adapter->tx_hang_recheck = false; 4707 4708 hw->mac.get_link_status = true; 4709 pm_runtime_put(&pdev->dev); 4710 4711 e1000e_trigger_lsc(adapter); 4712 4713 return 0; 4714 4715 err_req_irq: 4716 cpu_latency_qos_remove_request(&adapter->pm_qos_req); 4717 e1000e_release_hw_control(adapter); 4718 e1000_power_down_phy(adapter); 4719 e1000e_free_rx_resources(adapter->rx_ring); 4720 err_setup_rx: 4721 e1000e_free_tx_resources(adapter->tx_ring); 4722 err_setup_tx: 4723 e1000e_reset(adapter); 4724 pm_runtime_put_sync(&pdev->dev); 4725 4726 return err; 4727 } 4728 4729 /** 4730 * e1000e_close - Disables a network interface 4731 * @netdev: network interface device structure 4732 * 4733 * Returns 0, this is not allowed to fail 4734 * 4735 * The close entry point is called when an interface is de-activated 4736 * by the OS. The hardware is still under the drivers control, but 4737 * needs to be disabled. A global MAC reset is issued to stop the 4738 * hardware, and all transmit and receive resources are freed. 4739 **/ 4740 int e1000e_close(struct net_device *netdev) 4741 { 4742 struct e1000_adapter *adapter = netdev_priv(netdev); 4743 struct pci_dev *pdev = adapter->pdev; 4744 int count = E1000_CHECK_RESET_COUNT; 4745 4746 while (test_bit(__E1000_RESETTING, &adapter->state) && count--) 4747 usleep_range(10000, 11000); 4748 4749 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state)); 4750 4751 pm_runtime_get_sync(&pdev->dev); 4752 4753 if (netif_device_present(netdev)) { 4754 e1000e_down(adapter, true); 4755 e1000_free_irq(adapter); 4756 4757 /* Link status message must follow this format */ 4758 netdev_info(netdev, "NIC Link is Down\n"); 4759 } 4760 4761 netif_queue_set_napi(netdev, 0, NETDEV_QUEUE_TYPE_RX, NULL); 4762 netif_queue_set_napi(netdev, 0, NETDEV_QUEUE_TYPE_TX, NULL); 4763 napi_disable(&adapter->napi); 4764 4765 e1000e_free_tx_resources(adapter->tx_ring); 4766 e1000e_free_rx_resources(adapter->rx_ring); 4767 4768 /* kill manageability vlan ID if supported, but not if a vlan with 4769 * the same ID is registered on the host OS (let 8021q kill it) 4770 */ 4771 if (adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) 4772 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), 4773 adapter->mng_vlan_id); 4774 4775 /* If AMT is enabled, let the firmware know that the network 4776 * interface is now closed 4777 */ 4778 if ((adapter->flags & FLAG_HAS_AMT) && 4779 !test_bit(__E1000_TESTING, &adapter->state)) 4780 e1000e_release_hw_control(adapter); 4781 4782 cpu_latency_qos_remove_request(&adapter->pm_qos_req); 4783 4784 pm_runtime_put_sync(&pdev->dev); 4785 4786 return 0; 4787 } 4788 4789 /** 4790 * e1000_set_mac - Change the Ethernet Address of the NIC 4791 * @netdev: network interface device structure 4792 * @p: pointer to an address structure 4793 * 4794 * Returns 0 on success, negative on failure 4795 **/ 4796 static int e1000_set_mac(struct net_device *netdev, void *p) 4797 { 4798 struct e1000_adapter *adapter = netdev_priv(netdev); 4799 struct e1000_hw *hw = &adapter->hw; 4800 struct sockaddr *addr = p; 4801 4802 if (!is_valid_ether_addr(addr->sa_data)) 4803 return -EADDRNOTAVAIL; 4804 4805 eth_hw_addr_set(netdev, addr->sa_data); 4806 memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len); 4807 4808 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 0); 4809 4810 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) { 4811 /* activate the work around */ 4812 e1000e_set_laa_state_82571(&adapter->hw, 1); 4813 4814 /* Hold a copy of the LAA in RAR[14] This is done so that 4815 * between the time RAR[0] gets clobbered and the time it 4816 * gets fixed (in e1000_watchdog), the actual LAA is in one 4817 * of the RARs and no incoming packets directed to this port 4818 * are dropped. Eventually the LAA will be in RAR[0] and 4819 * RAR[14] 4820 */ 4821 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 4822 adapter->hw.mac.rar_entry_count - 1); 4823 } 4824 4825 return 0; 4826 } 4827 4828 /** 4829 * e1000e_update_phy_task - work thread to update phy 4830 * @work: pointer to our work struct 4831 * 4832 * this worker thread exists because we must acquire a 4833 * semaphore to read the phy, which we could msleep while 4834 * waiting for it, and we can't msleep in a timer. 4835 **/ 4836 static void e1000e_update_phy_task(struct work_struct *work) 4837 { 4838 struct e1000_adapter *adapter = container_of(work, 4839 struct e1000_adapter, 4840 update_phy_task); 4841 struct e1000_hw *hw = &adapter->hw; 4842 4843 if (test_bit(__E1000_DOWN, &adapter->state)) 4844 return; 4845 4846 e1000_get_phy_info(hw); 4847 4848 /* Enable EEE on 82579 after link up */ 4849 if (hw->phy.type >= e1000_phy_82579) 4850 e1000_set_eee_pchlan(hw); 4851 } 4852 4853 /** 4854 * e1000_update_phy_info - timre call-back to update PHY info 4855 * @t: pointer to timer_list containing private info adapter 4856 * 4857 * Need to wait a few seconds after link up to get diagnostic information from 4858 * the phy 4859 **/ 4860 static void e1000_update_phy_info(struct timer_list *t) 4861 { 4862 struct e1000_adapter *adapter = timer_container_of(adapter, t, 4863 phy_info_timer); 4864 4865 if (test_bit(__E1000_DOWN, &adapter->state)) 4866 return; 4867 4868 schedule_work(&adapter->update_phy_task); 4869 } 4870 4871 /** 4872 * e1000e_update_phy_stats - Update the PHY statistics counters 4873 * @adapter: board private structure 4874 * 4875 * Read/clear the upper 16-bit PHY registers and read/accumulate lower 4876 **/ 4877 static void e1000e_update_phy_stats(struct e1000_adapter *adapter) 4878 { 4879 struct e1000_hw *hw = &adapter->hw; 4880 s32 ret_val; 4881 u16 phy_data; 4882 4883 ret_val = hw->phy.ops.acquire(hw); 4884 if (ret_val) 4885 return; 4886 4887 /* A page set is expensive so check if already on desired page. 4888 * If not, set to the page with the PHY status registers. 4889 */ 4890 hw->phy.addr = 1; 4891 ret_val = e1000e_read_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, 4892 &phy_data); 4893 if (ret_val) 4894 goto release; 4895 if (phy_data != (HV_STATS_PAGE << IGP_PAGE_SHIFT)) { 4896 ret_val = hw->phy.ops.set_page(hw, 4897 HV_STATS_PAGE << IGP_PAGE_SHIFT); 4898 if (ret_val) 4899 goto release; 4900 } 4901 4902 /* Single Collision Count */ 4903 hw->phy.ops.read_reg_page(hw, HV_SCC_UPPER, &phy_data); 4904 ret_val = hw->phy.ops.read_reg_page(hw, HV_SCC_LOWER, &phy_data); 4905 if (!ret_val) 4906 adapter->stats.scc += phy_data; 4907 4908 /* Excessive Collision Count */ 4909 hw->phy.ops.read_reg_page(hw, HV_ECOL_UPPER, &phy_data); 4910 ret_val = hw->phy.ops.read_reg_page(hw, HV_ECOL_LOWER, &phy_data); 4911 if (!ret_val) 4912 adapter->stats.ecol += phy_data; 4913 4914 /* Multiple Collision Count */ 4915 hw->phy.ops.read_reg_page(hw, HV_MCC_UPPER, &phy_data); 4916 ret_val = hw->phy.ops.read_reg_page(hw, HV_MCC_LOWER, &phy_data); 4917 if (!ret_val) 4918 adapter->stats.mcc += phy_data; 4919 4920 /* Late Collision Count */ 4921 hw->phy.ops.read_reg_page(hw, HV_LATECOL_UPPER, &phy_data); 4922 ret_val = hw->phy.ops.read_reg_page(hw, HV_LATECOL_LOWER, &phy_data); 4923 if (!ret_val) 4924 adapter->stats.latecol += phy_data; 4925 4926 /* Collision Count - also used for adaptive IFS */ 4927 hw->phy.ops.read_reg_page(hw, HV_COLC_UPPER, &phy_data); 4928 ret_val = hw->phy.ops.read_reg_page(hw, HV_COLC_LOWER, &phy_data); 4929 if (!ret_val) 4930 hw->mac.collision_delta = phy_data; 4931 4932 /* Defer Count */ 4933 hw->phy.ops.read_reg_page(hw, HV_DC_UPPER, &phy_data); 4934 ret_val = hw->phy.ops.read_reg_page(hw, HV_DC_LOWER, &phy_data); 4935 if (!ret_val) 4936 adapter->stats.dc += phy_data; 4937 4938 /* Transmit with no CRS */ 4939 hw->phy.ops.read_reg_page(hw, HV_TNCRS_UPPER, &phy_data); 4940 ret_val = hw->phy.ops.read_reg_page(hw, HV_TNCRS_LOWER, &phy_data); 4941 if (!ret_val) 4942 adapter->stats.tncrs += phy_data; 4943 4944 release: 4945 hw->phy.ops.release(hw); 4946 } 4947 4948 /** 4949 * e1000e_update_stats - Update the board statistics counters 4950 * @adapter: board private structure 4951 **/ 4952 static void e1000e_update_stats(struct e1000_adapter *adapter) 4953 { 4954 struct net_device *netdev = adapter->netdev; 4955 struct e1000_hw *hw = &adapter->hw; 4956 struct pci_dev *pdev = adapter->pdev; 4957 4958 /* Prevent stats update while adapter is being reset, or if the pci 4959 * connection is down. 4960 */ 4961 if (adapter->link_speed == 0) 4962 return; 4963 if (pci_channel_offline(pdev)) 4964 return; 4965 4966 adapter->stats.crcerrs += er32(CRCERRS); 4967 adapter->stats.gprc += er32(GPRC); 4968 adapter->stats.gorc += er32(GORCL); 4969 er32(GORCH); /* Clear gorc */ 4970 adapter->stats.bprc += er32(BPRC); 4971 adapter->stats.mprc += er32(MPRC); 4972 adapter->stats.roc += er32(ROC); 4973 4974 adapter->stats.mpc += er32(MPC); 4975 4976 /* Half-duplex statistics */ 4977 if (adapter->link_duplex == HALF_DUPLEX) { 4978 if (adapter->flags2 & FLAG2_HAS_PHY_STATS) { 4979 e1000e_update_phy_stats(adapter); 4980 } else { 4981 adapter->stats.scc += er32(SCC); 4982 adapter->stats.ecol += er32(ECOL); 4983 adapter->stats.mcc += er32(MCC); 4984 adapter->stats.latecol += er32(LATECOL); 4985 adapter->stats.dc += er32(DC); 4986 4987 hw->mac.collision_delta = er32(COLC); 4988 4989 if ((hw->mac.type != e1000_82574) && 4990 (hw->mac.type != e1000_82583)) 4991 adapter->stats.tncrs += er32(TNCRS); 4992 } 4993 adapter->stats.colc += hw->mac.collision_delta; 4994 } 4995 4996 adapter->stats.xonrxc += er32(XONRXC); 4997 adapter->stats.xontxc += er32(XONTXC); 4998 adapter->stats.xoffrxc += er32(XOFFRXC); 4999 adapter->stats.xofftxc += er32(XOFFTXC); 5000 adapter->stats.gptc += er32(GPTC); 5001 adapter->stats.gotc += er32(GOTCL); 5002 er32(GOTCH); /* Clear gotc */ 5003 adapter->stats.rnbc += er32(RNBC); 5004 adapter->stats.ruc += er32(RUC); 5005 5006 adapter->stats.mptc += er32(MPTC); 5007 adapter->stats.bptc += er32(BPTC); 5008 5009 /* used for adaptive IFS */ 5010 5011 hw->mac.tx_packet_delta = er32(TPT); 5012 adapter->stats.tpt += hw->mac.tx_packet_delta; 5013 5014 adapter->stats.algnerrc += er32(ALGNERRC); 5015 adapter->stats.rxerrc += er32(RXERRC); 5016 adapter->stats.cexterr += er32(CEXTERR); 5017 adapter->stats.tsctc += er32(TSCTC); 5018 adapter->stats.tsctfc += er32(TSCTFC); 5019 5020 /* Fill out the OS statistics structure */ 5021 netdev->stats.multicast = adapter->stats.mprc; 5022 netdev->stats.collisions = adapter->stats.colc; 5023 5024 /* Rx Errors */ 5025 5026 /* RLEC on some newer hardware can be incorrect so build 5027 * our own version based on RUC and ROC 5028 */ 5029 netdev->stats.rx_errors = adapter->stats.rxerrc + 5030 adapter->stats.crcerrs + adapter->stats.algnerrc + 5031 adapter->stats.ruc + adapter->stats.roc + adapter->stats.cexterr; 5032 netdev->stats.rx_length_errors = adapter->stats.ruc + 5033 adapter->stats.roc; 5034 netdev->stats.rx_crc_errors = adapter->stats.crcerrs; 5035 netdev->stats.rx_frame_errors = adapter->stats.algnerrc; 5036 netdev->stats.rx_missed_errors = adapter->stats.mpc; 5037 5038 /* Tx Errors */ 5039 netdev->stats.tx_errors = adapter->stats.ecol + adapter->stats.latecol; 5040 netdev->stats.tx_aborted_errors = adapter->stats.ecol; 5041 netdev->stats.tx_window_errors = adapter->stats.latecol; 5042 netdev->stats.tx_carrier_errors = adapter->stats.tncrs; 5043 5044 /* Tx Dropped needs to be maintained elsewhere */ 5045 5046 /* Management Stats */ 5047 adapter->stats.mgptc += er32(MGTPTC); 5048 adapter->stats.mgprc += er32(MGTPRC); 5049 adapter->stats.mgpdc += er32(MGTPDC); 5050 5051 /* Correctable ECC Errors */ 5052 if (hw->mac.type >= e1000_pch_lpt) { 5053 u32 pbeccsts = er32(PBECCSTS); 5054 5055 adapter->corr_errors += 5056 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK; 5057 adapter->uncorr_errors += 5058 FIELD_GET(E1000_PBECCSTS_UNCORR_ERR_CNT_MASK, pbeccsts); 5059 } 5060 } 5061 5062 /** 5063 * e1000_phy_read_status - Update the PHY register status snapshot 5064 * @adapter: board private structure 5065 **/ 5066 static void e1000_phy_read_status(struct e1000_adapter *adapter) 5067 { 5068 struct e1000_hw *hw = &adapter->hw; 5069 struct e1000_phy_regs *phy = &adapter->phy_regs; 5070 5071 if (!pm_runtime_suspended((&adapter->pdev->dev)->parent) && 5072 (er32(STATUS) & E1000_STATUS_LU) && 5073 (adapter->hw.phy.media_type == e1000_media_type_copper)) { 5074 int ret_val; 5075 5076 ret_val = e1e_rphy(hw, MII_BMCR, &phy->bmcr); 5077 ret_val |= e1e_rphy(hw, MII_BMSR, &phy->bmsr); 5078 ret_val |= e1e_rphy(hw, MII_ADVERTISE, &phy->advertise); 5079 ret_val |= e1e_rphy(hw, MII_LPA, &phy->lpa); 5080 ret_val |= e1e_rphy(hw, MII_EXPANSION, &phy->expansion); 5081 ret_val |= e1e_rphy(hw, MII_CTRL1000, &phy->ctrl1000); 5082 ret_val |= e1e_rphy(hw, MII_STAT1000, &phy->stat1000); 5083 ret_val |= e1e_rphy(hw, MII_ESTATUS, &phy->estatus); 5084 if (ret_val) 5085 e_warn("Error reading PHY register\n"); 5086 } else { 5087 /* Do not read PHY registers if link is not up 5088 * Set values to typical power-on defaults 5089 */ 5090 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX); 5091 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL | 5092 BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE | 5093 BMSR_ERCAP); 5094 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP | 5095 ADVERTISE_ALL | ADVERTISE_CSMA); 5096 phy->lpa = 0; 5097 phy->expansion = EXPANSION_ENABLENPAGE; 5098 phy->ctrl1000 = ADVERTISE_1000FULL; 5099 phy->stat1000 = 0; 5100 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF); 5101 } 5102 } 5103 5104 static void e1000_print_link_info(struct e1000_adapter *adapter) 5105 { 5106 struct e1000_hw *hw = &adapter->hw; 5107 u32 ctrl = er32(CTRL); 5108 5109 /* Link status message must follow this format for user tools */ 5110 netdev_info(adapter->netdev, 5111 "NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n", 5112 adapter->link_speed, 5113 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half", 5114 (ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE) ? "Rx/Tx" : 5115 (ctrl & E1000_CTRL_RFCE) ? "Rx" : 5116 (ctrl & E1000_CTRL_TFCE) ? "Tx" : "None"); 5117 } 5118 5119 static bool e1000e_has_link(struct e1000_adapter *adapter) 5120 { 5121 struct e1000_hw *hw = &adapter->hw; 5122 bool link_active = false; 5123 s32 ret_val = 0; 5124 5125 /* get_link_status is set on LSC (link status) interrupt or 5126 * Rx sequence error interrupt. get_link_status will stay 5127 * true until the check_for_link establishes link 5128 * for copper adapters ONLY 5129 */ 5130 switch (hw->phy.media_type) { 5131 case e1000_media_type_copper: 5132 if (hw->mac.get_link_status) { 5133 ret_val = hw->mac.ops.check_for_link(hw); 5134 link_active = !hw->mac.get_link_status; 5135 } else { 5136 link_active = true; 5137 } 5138 break; 5139 case e1000_media_type_fiber: 5140 ret_val = hw->mac.ops.check_for_link(hw); 5141 link_active = !!(er32(STATUS) & E1000_STATUS_LU); 5142 break; 5143 case e1000_media_type_internal_serdes: 5144 ret_val = hw->mac.ops.check_for_link(hw); 5145 link_active = hw->mac.serdes_has_link; 5146 break; 5147 default: 5148 case e1000_media_type_unknown: 5149 break; 5150 } 5151 5152 if ((ret_val == -E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) && 5153 (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) { 5154 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */ 5155 e_info("Gigabit has been disabled, downgrading speed\n"); 5156 } 5157 5158 return link_active; 5159 } 5160 5161 static void e1000e_enable_receives(struct e1000_adapter *adapter) 5162 { 5163 /* make sure the receive unit is started */ 5164 if ((adapter->flags & FLAG_RX_NEEDS_RESTART) && 5165 (adapter->flags & FLAG_RESTART_NOW)) { 5166 struct e1000_hw *hw = &adapter->hw; 5167 u32 rctl = er32(RCTL); 5168 5169 ew32(RCTL, rctl | E1000_RCTL_EN); 5170 adapter->flags &= ~FLAG_RESTART_NOW; 5171 } 5172 } 5173 5174 static void e1000e_check_82574_phy_workaround(struct e1000_adapter *adapter) 5175 { 5176 struct e1000_hw *hw = &adapter->hw; 5177 5178 /* With 82574 controllers, PHY needs to be checked periodically 5179 * for hung state and reset, if two calls return true 5180 */ 5181 if (e1000_check_phy_82574(hw)) 5182 adapter->phy_hang_count++; 5183 else 5184 adapter->phy_hang_count = 0; 5185 5186 if (adapter->phy_hang_count > 1) { 5187 adapter->phy_hang_count = 0; 5188 e_dbg("PHY appears hung - resetting\n"); 5189 schedule_work(&adapter->reset_task); 5190 } 5191 } 5192 5193 /** 5194 * e1000_watchdog - Timer Call-back 5195 * @t: pointer to timer_list containing private info adapter 5196 **/ 5197 static void e1000_watchdog(struct timer_list *t) 5198 { 5199 struct e1000_adapter *adapter = timer_container_of(adapter, t, 5200 watchdog_timer); 5201 5202 /* Do the rest outside of interrupt context */ 5203 schedule_work(&adapter->watchdog_task); 5204 5205 /* TODO: make this use queue_delayed_work() */ 5206 } 5207 5208 static void e1000_watchdog_task(struct work_struct *work) 5209 { 5210 struct e1000_adapter *adapter = container_of(work, 5211 struct e1000_adapter, 5212 watchdog_task); 5213 struct net_device *netdev = adapter->netdev; 5214 struct e1000_mac_info *mac = &adapter->hw.mac; 5215 struct e1000_phy_info *phy = &adapter->hw.phy; 5216 struct e1000_ring *tx_ring = adapter->tx_ring; 5217 u32 dmoff_exit_timeout = 100, tries = 0; 5218 struct e1000_hw *hw = &adapter->hw; 5219 u32 link, tctl, pcim_state; 5220 5221 if (test_bit(__E1000_DOWN, &adapter->state)) 5222 return; 5223 5224 link = e1000e_has_link(adapter); 5225 if ((netif_carrier_ok(netdev)) && link) { 5226 /* Cancel scheduled suspend requests. */ 5227 pm_runtime_resume(netdev->dev.parent); 5228 5229 e1000e_enable_receives(adapter); 5230 goto link_up; 5231 } 5232 5233 if ((e1000e_enable_tx_pkt_filtering(hw)) && 5234 (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)) 5235 e1000_update_mng_vlan(adapter); 5236 5237 if (link) { 5238 if (!netif_carrier_ok(netdev)) { 5239 bool txb2b = true; 5240 5241 /* Cancel scheduled suspend requests. */ 5242 pm_runtime_resume(netdev->dev.parent); 5243 5244 /* Checking if MAC is in DMoff state*/ 5245 if (er32(FWSM) & E1000_ICH_FWSM_FW_VALID) { 5246 pcim_state = er32(STATUS); 5247 while (pcim_state & E1000_STATUS_PCIM_STATE) { 5248 if (tries++ == dmoff_exit_timeout) { 5249 e_dbg("Error in exiting dmoff\n"); 5250 break; 5251 } 5252 usleep_range(10000, 20000); 5253 pcim_state = er32(STATUS); 5254 5255 /* Checking if MAC exited DMoff state */ 5256 if (!(pcim_state & E1000_STATUS_PCIM_STATE)) 5257 e1000_phy_hw_reset(&adapter->hw); 5258 } 5259 } 5260 5261 /* update snapshot of PHY registers on LSC */ 5262 e1000_phy_read_status(adapter); 5263 mac->ops.get_link_up_info(&adapter->hw, 5264 &adapter->link_speed, 5265 &adapter->link_duplex); 5266 e1000_print_link_info(adapter); 5267 5268 /* check if SmartSpeed worked */ 5269 e1000e_check_downshift(hw); 5270 if (phy->speed_downgraded) 5271 netdev_warn(netdev, 5272 "Link Speed was downgraded by SmartSpeed\n"); 5273 5274 /* On supported PHYs, check for duplex mismatch only 5275 * if link has autonegotiated at 10/100 half 5276 */ 5277 if ((hw->phy.type == e1000_phy_igp_3 || 5278 hw->phy.type == e1000_phy_bm) && 5279 hw->mac.autoneg && 5280 (adapter->link_speed == SPEED_10 || 5281 adapter->link_speed == SPEED_100) && 5282 (adapter->link_duplex == HALF_DUPLEX)) { 5283 u16 autoneg_exp; 5284 5285 e1e_rphy(hw, MII_EXPANSION, &autoneg_exp); 5286 5287 if (!(autoneg_exp & EXPANSION_NWAY)) 5288 e_info("Autonegotiated half duplex but link partner cannot autoneg. Try forcing full duplex if link gets many collisions.\n"); 5289 } 5290 5291 /* adjust timeout factor according to speed/duplex */ 5292 adapter->tx_timeout_factor = 1; 5293 switch (adapter->link_speed) { 5294 case SPEED_10: 5295 txb2b = false; 5296 adapter->tx_timeout_factor = 16; 5297 break; 5298 case SPEED_100: 5299 txb2b = false; 5300 adapter->tx_timeout_factor = 10; 5301 break; 5302 } 5303 5304 /* workaround: re-program speed mode bit after 5305 * link-up event 5306 */ 5307 if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) && 5308 !txb2b) { 5309 u32 tarc0; 5310 5311 tarc0 = er32(TARC(0)); 5312 tarc0 &= ~SPEED_MODE_BIT; 5313 ew32(TARC(0), tarc0); 5314 } 5315 5316 /* enable transmits in the hardware, need to do this 5317 * after setting TARC(0) 5318 */ 5319 tctl = er32(TCTL); 5320 tctl |= E1000_TCTL_EN; 5321 ew32(TCTL, tctl); 5322 5323 /* Perform any post-link-up configuration before 5324 * reporting link up. 5325 */ 5326 if (phy->ops.cfg_on_link_up) 5327 phy->ops.cfg_on_link_up(hw); 5328 5329 netif_wake_queue(netdev); 5330 netif_carrier_on(netdev); 5331 5332 if (!test_bit(__E1000_DOWN, &adapter->state)) 5333 mod_timer(&adapter->phy_info_timer, 5334 round_jiffies(jiffies + 2 * HZ)); 5335 } 5336 } else { 5337 if (netif_carrier_ok(netdev)) { 5338 adapter->link_speed = 0; 5339 adapter->link_duplex = 0; 5340 /* Link status message must follow this format */ 5341 netdev_info(netdev, "NIC Link is Down\n"); 5342 netif_carrier_off(netdev); 5343 netif_stop_queue(netdev); 5344 if (!test_bit(__E1000_DOWN, &adapter->state)) 5345 mod_timer(&adapter->phy_info_timer, 5346 round_jiffies(jiffies + 2 * HZ)); 5347 5348 /* 8000ES2LAN requires a Rx packet buffer work-around 5349 * on link down event; reset the controller to flush 5350 * the Rx packet buffer. 5351 */ 5352 if (adapter->flags & FLAG_RX_NEEDS_RESTART) 5353 adapter->flags |= FLAG_RESTART_NOW; 5354 else 5355 pm_schedule_suspend(netdev->dev.parent, 5356 LINK_TIMEOUT); 5357 } 5358 } 5359 5360 link_up: 5361 spin_lock(&adapter->stats64_lock); 5362 e1000e_update_stats(adapter); 5363 5364 mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old; 5365 adapter->tpt_old = adapter->stats.tpt; 5366 mac->collision_delta = adapter->stats.colc - adapter->colc_old; 5367 adapter->colc_old = adapter->stats.colc; 5368 5369 adapter->gorc = adapter->stats.gorc - adapter->gorc_old; 5370 adapter->gorc_old = adapter->stats.gorc; 5371 adapter->gotc = adapter->stats.gotc - adapter->gotc_old; 5372 adapter->gotc_old = adapter->stats.gotc; 5373 spin_unlock(&adapter->stats64_lock); 5374 5375 /* If the link is lost the controller stops DMA, but 5376 * if there is queued Tx work it cannot be done. So 5377 * reset the controller to flush the Tx packet buffers. 5378 */ 5379 if (!netif_carrier_ok(netdev) && 5380 (e1000_desc_unused(tx_ring) + 1 < tx_ring->count)) 5381 adapter->flags |= FLAG_RESTART_NOW; 5382 5383 /* If reset is necessary, do it outside of interrupt context. */ 5384 if (adapter->flags & FLAG_RESTART_NOW) { 5385 schedule_work(&adapter->reset_task); 5386 /* return immediately since reset is imminent */ 5387 return; 5388 } 5389 5390 e1000e_update_adaptive(&adapter->hw); 5391 5392 /* Simple mode for Interrupt Throttle Rate (ITR) */ 5393 if (adapter->itr_setting == 4) { 5394 /* Symmetric Tx/Rx gets a reduced ITR=2000; 5395 * Total asymmetrical Tx or Rx gets ITR=8000; 5396 * everyone else is between 2000-8000. 5397 */ 5398 u32 goc = (adapter->gotc + adapter->gorc) / 10000; 5399 u32 dif = (adapter->gotc > adapter->gorc ? 5400 adapter->gotc - adapter->gorc : 5401 adapter->gorc - adapter->gotc) / 10000; 5402 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000; 5403 5404 e1000e_write_itr(adapter, itr); 5405 } 5406 5407 /* Cause software interrupt to ensure Rx ring is cleaned */ 5408 if (adapter->msix_entries) 5409 ew32(ICS, adapter->rx_ring->ims_val); 5410 else 5411 ew32(ICS, E1000_ICS_RXDMT0); 5412 5413 /* flush pending descriptors to memory before detecting Tx hang */ 5414 e1000e_flush_descriptors(adapter); 5415 5416 /* Force detection of hung controller every watchdog period */ 5417 adapter->detect_tx_hung = true; 5418 5419 /* With 82571 controllers, LAA may be overwritten due to controller 5420 * reset from the other port. Set the appropriate LAA in RAR[0] 5421 */ 5422 if (e1000e_get_laa_state_82571(hw)) 5423 hw->mac.ops.rar_set(hw, adapter->hw.mac.addr, 0); 5424 5425 if (adapter->flags2 & FLAG2_CHECK_PHY_HANG) 5426 e1000e_check_82574_phy_workaround(adapter); 5427 5428 /* Clear valid timestamp stuck in RXSTMPL/H due to a Rx error */ 5429 if (adapter->hwtstamp_config.rx_filter != HWTSTAMP_FILTER_NONE) { 5430 if ((adapter->flags2 & FLAG2_CHECK_RX_HWTSTAMP) && 5431 (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID)) { 5432 er32(RXSTMPH); 5433 adapter->rx_hwtstamp_cleared++; 5434 } else { 5435 adapter->flags2 |= FLAG2_CHECK_RX_HWTSTAMP; 5436 } 5437 } 5438 5439 /* Reset the timer */ 5440 if (!test_bit(__E1000_DOWN, &adapter->state)) 5441 mod_timer(&adapter->watchdog_timer, 5442 round_jiffies(jiffies + 2 * HZ)); 5443 } 5444 5445 #define E1000_TX_FLAGS_CSUM 0x00000001 5446 #define E1000_TX_FLAGS_VLAN 0x00000002 5447 #define E1000_TX_FLAGS_TSO 0x00000004 5448 #define E1000_TX_FLAGS_IPV4 0x00000008 5449 #define E1000_TX_FLAGS_NO_FCS 0x00000010 5450 #define E1000_TX_FLAGS_HWTSTAMP 0x00000020 5451 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000 5452 #define E1000_TX_FLAGS_VLAN_SHIFT 16 5453 5454 static int e1000_tso(struct e1000_ring *tx_ring, struct sk_buff *skb, 5455 __be16 protocol) 5456 { 5457 struct e1000_context_desc *context_desc; 5458 struct e1000_buffer *buffer_info; 5459 unsigned int i; 5460 u32 cmd_length = 0; 5461 u16 ipcse = 0, mss; 5462 u8 ipcss, ipcso, tucss, tucso, hdr_len; 5463 int err; 5464 5465 if (!skb_is_gso(skb)) 5466 return 0; 5467 5468 err = skb_cow_head(skb, 0); 5469 if (err < 0) 5470 return err; 5471 5472 hdr_len = skb_tcp_all_headers(skb); 5473 mss = skb_shinfo(skb)->gso_size; 5474 if (protocol == htons(ETH_P_IP)) { 5475 struct iphdr *iph = ip_hdr(skb); 5476 iph->tot_len = 0; 5477 iph->check = 0; 5478 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 5479 0, IPPROTO_TCP, 0); 5480 cmd_length = E1000_TXD_CMD_IP; 5481 ipcse = skb_transport_offset(skb) - 1; 5482 } else if (skb_is_gso_v6(skb)) { 5483 tcp_v6_gso_csum_prep(skb); 5484 ipcse = 0; 5485 } 5486 ipcss = skb_network_offset(skb); 5487 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data; 5488 tucss = skb_transport_offset(skb); 5489 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; 5490 5491 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE | 5492 E1000_TXD_CMD_TCP | (skb->len - (hdr_len))); 5493 5494 i = tx_ring->next_to_use; 5495 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); 5496 buffer_info = &tx_ring->buffer_info[i]; 5497 5498 context_desc->lower_setup.ip_fields.ipcss = ipcss; 5499 context_desc->lower_setup.ip_fields.ipcso = ipcso; 5500 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse); 5501 context_desc->upper_setup.tcp_fields.tucss = tucss; 5502 context_desc->upper_setup.tcp_fields.tucso = tucso; 5503 context_desc->upper_setup.tcp_fields.tucse = 0; 5504 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss); 5505 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len; 5506 context_desc->cmd_and_length = cpu_to_le32(cmd_length); 5507 5508 buffer_info->time_stamp = jiffies; 5509 buffer_info->next_to_watch = i; 5510 5511 i++; 5512 if (i == tx_ring->count) 5513 i = 0; 5514 tx_ring->next_to_use = i; 5515 5516 return 1; 5517 } 5518 5519 static bool e1000_tx_csum(struct e1000_ring *tx_ring, struct sk_buff *skb, 5520 __be16 protocol) 5521 { 5522 struct e1000_adapter *adapter = tx_ring->adapter; 5523 struct e1000_context_desc *context_desc; 5524 struct e1000_buffer *buffer_info; 5525 unsigned int i; 5526 u8 css; 5527 u32 cmd_len = E1000_TXD_CMD_DEXT; 5528 5529 if (skb->ip_summed != CHECKSUM_PARTIAL) 5530 return false; 5531 5532 switch (protocol) { 5533 case cpu_to_be16(ETH_P_IP): 5534 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 5535 cmd_len |= E1000_TXD_CMD_TCP; 5536 break; 5537 case cpu_to_be16(ETH_P_IPV6): 5538 /* XXX not handling all IPV6 headers */ 5539 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 5540 cmd_len |= E1000_TXD_CMD_TCP; 5541 break; 5542 default: 5543 if (unlikely(net_ratelimit())) 5544 e_warn("checksum_partial proto=%x!\n", 5545 be16_to_cpu(protocol)); 5546 break; 5547 } 5548 5549 css = skb_checksum_start_offset(skb); 5550 5551 i = tx_ring->next_to_use; 5552 buffer_info = &tx_ring->buffer_info[i]; 5553 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); 5554 5555 context_desc->lower_setup.ip_config = 0; 5556 context_desc->upper_setup.tcp_fields.tucss = css; 5557 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum_offset; 5558 context_desc->upper_setup.tcp_fields.tucse = 0; 5559 context_desc->tcp_seg_setup.data = 0; 5560 context_desc->cmd_and_length = cpu_to_le32(cmd_len); 5561 5562 buffer_info->time_stamp = jiffies; 5563 buffer_info->next_to_watch = i; 5564 5565 i++; 5566 if (i == tx_ring->count) 5567 i = 0; 5568 tx_ring->next_to_use = i; 5569 5570 return true; 5571 } 5572 5573 static int e1000_tx_map(struct e1000_ring *tx_ring, struct sk_buff *skb, 5574 unsigned int first, unsigned int max_per_txd, 5575 unsigned int nr_frags) 5576 { 5577 struct e1000_adapter *adapter = tx_ring->adapter; 5578 struct pci_dev *pdev = adapter->pdev; 5579 struct e1000_buffer *buffer_info; 5580 unsigned int len = skb_headlen(skb); 5581 unsigned int offset = 0, size, count = 0, i; 5582 unsigned int f, bytecount, segs; 5583 5584 i = tx_ring->next_to_use; 5585 5586 while (len) { 5587 buffer_info = &tx_ring->buffer_info[i]; 5588 size = min(len, max_per_txd); 5589 5590 buffer_info->length = size; 5591 buffer_info->time_stamp = jiffies; 5592 buffer_info->next_to_watch = i; 5593 buffer_info->dma = dma_map_single(&pdev->dev, 5594 skb->data + offset, 5595 size, DMA_TO_DEVICE); 5596 buffer_info->mapped_as_page = false; 5597 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 5598 goto dma_error; 5599 5600 len -= size; 5601 offset += size; 5602 count++; 5603 5604 if (len) { 5605 i++; 5606 if (i == tx_ring->count) 5607 i = 0; 5608 } 5609 } 5610 5611 for (f = 0; f < nr_frags; f++) { 5612 const skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; 5613 5614 len = skb_frag_size(frag); 5615 offset = 0; 5616 5617 while (len) { 5618 i++; 5619 if (i == tx_ring->count) 5620 i = 0; 5621 5622 buffer_info = &tx_ring->buffer_info[i]; 5623 size = min(len, max_per_txd); 5624 5625 buffer_info->length = size; 5626 buffer_info->time_stamp = jiffies; 5627 buffer_info->next_to_watch = i; 5628 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 5629 offset, size, 5630 DMA_TO_DEVICE); 5631 buffer_info->mapped_as_page = true; 5632 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 5633 goto dma_error; 5634 5635 len -= size; 5636 offset += size; 5637 count++; 5638 } 5639 } 5640 5641 segs = skb_shinfo(skb)->gso_segs ? : 1; 5642 /* multiply data chunks by size of headers */ 5643 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len; 5644 5645 tx_ring->buffer_info[i].skb = skb; 5646 tx_ring->buffer_info[i].segs = segs; 5647 tx_ring->buffer_info[i].bytecount = bytecount; 5648 tx_ring->buffer_info[first].next_to_watch = i; 5649 5650 return count; 5651 5652 dma_error: 5653 dev_err(&pdev->dev, "Tx DMA map failed\n"); 5654 buffer_info->dma = 0; 5655 if (count) 5656 count--; 5657 5658 while (count--) { 5659 if (i == 0) 5660 i += tx_ring->count; 5661 i--; 5662 buffer_info = &tx_ring->buffer_info[i]; 5663 e1000_put_txbuf(tx_ring, buffer_info, true); 5664 } 5665 5666 return 0; 5667 } 5668 5669 static void e1000_tx_queue(struct e1000_ring *tx_ring, int tx_flags, int count) 5670 { 5671 struct e1000_adapter *adapter = tx_ring->adapter; 5672 struct e1000_tx_desc *tx_desc = NULL; 5673 struct e1000_buffer *buffer_info; 5674 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS; 5675 unsigned int i; 5676 5677 if (tx_flags & E1000_TX_FLAGS_TSO) { 5678 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D | 5679 E1000_TXD_CMD_TSE; 5680 txd_upper |= E1000_TXD_POPTS_TXSM << 8; 5681 5682 if (tx_flags & E1000_TX_FLAGS_IPV4) 5683 txd_upper |= E1000_TXD_POPTS_IXSM << 8; 5684 } 5685 5686 if (tx_flags & E1000_TX_FLAGS_CSUM) { 5687 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; 5688 txd_upper |= E1000_TXD_POPTS_TXSM << 8; 5689 } 5690 5691 if (tx_flags & E1000_TX_FLAGS_VLAN) { 5692 txd_lower |= E1000_TXD_CMD_VLE; 5693 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK); 5694 } 5695 5696 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) 5697 txd_lower &= ~(E1000_TXD_CMD_IFCS); 5698 5699 if (unlikely(tx_flags & E1000_TX_FLAGS_HWTSTAMP)) { 5700 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; 5701 txd_upper |= E1000_TXD_EXTCMD_TSTAMP; 5702 } 5703 5704 i = tx_ring->next_to_use; 5705 5706 do { 5707 buffer_info = &tx_ring->buffer_info[i]; 5708 tx_desc = E1000_TX_DESC(*tx_ring, i); 5709 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 5710 tx_desc->lower.data = cpu_to_le32(txd_lower | 5711 buffer_info->length); 5712 tx_desc->upper.data = cpu_to_le32(txd_upper); 5713 5714 i++; 5715 if (i == tx_ring->count) 5716 i = 0; 5717 } while (--count > 0); 5718 5719 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd); 5720 5721 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */ 5722 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) 5723 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS)); 5724 5725 /* Force memory writes to complete before letting h/w 5726 * know there are new descriptors to fetch. (Only 5727 * applicable for weak-ordered memory model archs, 5728 * such as IA-64). 5729 */ 5730 wmb(); 5731 5732 tx_ring->next_to_use = i; 5733 } 5734 5735 #define MINIMUM_DHCP_PACKET_SIZE 282 5736 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter, 5737 struct sk_buff *skb) 5738 { 5739 struct e1000_hw *hw = &adapter->hw; 5740 u16 length, offset; 5741 5742 if (skb_vlan_tag_present(skb) && 5743 !((skb_vlan_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) && 5744 (adapter->hw.mng_cookie.status & 5745 E1000_MNG_DHCP_COOKIE_STATUS_VLAN))) 5746 return 0; 5747 5748 if (skb->len <= MINIMUM_DHCP_PACKET_SIZE) 5749 return 0; 5750 5751 if (((struct ethhdr *)skb->data)->h_proto != htons(ETH_P_IP)) 5752 return 0; 5753 5754 { 5755 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data + 14); 5756 struct udphdr *udp; 5757 5758 if (ip->protocol != IPPROTO_UDP) 5759 return 0; 5760 5761 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2)); 5762 if (ntohs(udp->dest) != 67) 5763 return 0; 5764 5765 offset = (u8 *)udp + 8 - skb->data; 5766 length = skb->len - offset; 5767 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length); 5768 } 5769 5770 return 0; 5771 } 5772 5773 static int __e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size) 5774 { 5775 struct e1000_adapter *adapter = tx_ring->adapter; 5776 5777 netif_stop_queue(adapter->netdev); 5778 /* Herbert's original patch had: 5779 * smp_mb__after_netif_stop_queue(); 5780 * but since that doesn't exist yet, just open code it. 5781 */ 5782 smp_mb(); 5783 5784 /* We need to check again in a case another CPU has just 5785 * made room available. 5786 */ 5787 if (e1000_desc_unused(tx_ring) < size) 5788 return -EBUSY; 5789 5790 /* A reprieve! */ 5791 netif_start_queue(adapter->netdev); 5792 ++adapter->restart_queue; 5793 return 0; 5794 } 5795 5796 static int e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size) 5797 { 5798 BUG_ON(size > tx_ring->count); 5799 5800 if (e1000_desc_unused(tx_ring) >= size) 5801 return 0; 5802 return __e1000_maybe_stop_tx(tx_ring, size); 5803 } 5804 5805 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, 5806 struct net_device *netdev) 5807 { 5808 struct e1000_adapter *adapter = netdev_priv(netdev); 5809 struct e1000_ring *tx_ring = adapter->tx_ring; 5810 unsigned int first; 5811 unsigned int tx_flags = 0; 5812 unsigned int len = skb_headlen(skb); 5813 unsigned int nr_frags; 5814 unsigned int mss; 5815 int count = 0; 5816 int tso; 5817 unsigned int f; 5818 __be16 protocol = vlan_get_protocol(skb); 5819 5820 if (test_bit(__E1000_DOWN, &adapter->state)) { 5821 dev_kfree_skb_any(skb); 5822 return NETDEV_TX_OK; 5823 } 5824 5825 if (skb->len <= 0) { 5826 dev_kfree_skb_any(skb); 5827 return NETDEV_TX_OK; 5828 } 5829 5830 /* The minimum packet size with TCTL.PSP set is 17 bytes so 5831 * pad skb in order to meet this minimum size requirement 5832 */ 5833 if (skb_put_padto(skb, 17)) 5834 return NETDEV_TX_OK; 5835 5836 mss = skb_shinfo(skb)->gso_size; 5837 if (mss) { 5838 u8 hdr_len; 5839 5840 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data 5841 * points to just header, pull a few bytes of payload from 5842 * frags into skb->data 5843 */ 5844 hdr_len = skb_tcp_all_headers(skb); 5845 /* we do this workaround for ES2LAN, but it is un-necessary, 5846 * avoiding it could save a lot of cycles 5847 */ 5848 if (skb->data_len && (hdr_len == len)) { 5849 unsigned int pull_size; 5850 5851 pull_size = min_t(unsigned int, 4, skb->data_len); 5852 if (!__pskb_pull_tail(skb, pull_size)) { 5853 e_err("__pskb_pull_tail failed.\n"); 5854 dev_kfree_skb_any(skb); 5855 return NETDEV_TX_OK; 5856 } 5857 len = skb_headlen(skb); 5858 } 5859 } 5860 5861 /* reserve a descriptor for the offload context */ 5862 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL)) 5863 count++; 5864 count++; 5865 5866 count += DIV_ROUND_UP(len, adapter->tx_fifo_limit); 5867 5868 nr_frags = skb_shinfo(skb)->nr_frags; 5869 for (f = 0; f < nr_frags; f++) 5870 count += DIV_ROUND_UP(skb_frag_size(&skb_shinfo(skb)->frags[f]), 5871 adapter->tx_fifo_limit); 5872 5873 if (adapter->hw.mac.tx_pkt_filtering) 5874 e1000_transfer_dhcp_info(adapter, skb); 5875 5876 /* need: count + 2 desc gap to keep tail from touching 5877 * head, otherwise try next time 5878 */ 5879 if (e1000_maybe_stop_tx(tx_ring, count + 2)) 5880 return NETDEV_TX_BUSY; 5881 5882 if (skb_vlan_tag_present(skb)) { 5883 tx_flags |= E1000_TX_FLAGS_VLAN; 5884 tx_flags |= (skb_vlan_tag_get(skb) << 5885 E1000_TX_FLAGS_VLAN_SHIFT); 5886 } 5887 5888 first = tx_ring->next_to_use; 5889 5890 tso = e1000_tso(tx_ring, skb, protocol); 5891 if (tso < 0) { 5892 dev_kfree_skb_any(skb); 5893 return NETDEV_TX_OK; 5894 } 5895 5896 if (tso) 5897 tx_flags |= E1000_TX_FLAGS_TSO; 5898 else if (e1000_tx_csum(tx_ring, skb, protocol)) 5899 tx_flags |= E1000_TX_FLAGS_CSUM; 5900 5901 /* Old method was to assume IPv4 packet by default if TSO was enabled. 5902 * 82571 hardware supports TSO capabilities for IPv6 as well... 5903 * no longer assume, we must. 5904 */ 5905 if (protocol == htons(ETH_P_IP)) 5906 tx_flags |= E1000_TX_FLAGS_IPV4; 5907 5908 if (unlikely(skb->no_fcs)) 5909 tx_flags |= E1000_TX_FLAGS_NO_FCS; 5910 5911 /* if count is 0 then mapping error has occurred */ 5912 count = e1000_tx_map(tx_ring, skb, first, adapter->tx_fifo_limit, 5913 nr_frags); 5914 if (count) { 5915 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && 5916 (adapter->flags & FLAG_HAS_HW_TIMESTAMP)) { 5917 if (!adapter->tx_hwtstamp_skb) { 5918 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 5919 tx_flags |= E1000_TX_FLAGS_HWTSTAMP; 5920 adapter->tx_hwtstamp_skb = skb_get(skb); 5921 adapter->tx_hwtstamp_start = jiffies; 5922 schedule_work(&adapter->tx_hwtstamp_work); 5923 } else { 5924 adapter->tx_hwtstamp_skipped++; 5925 } 5926 } 5927 5928 skb_tx_timestamp(skb); 5929 5930 netdev_sent_queue(netdev, skb->len); 5931 e1000_tx_queue(tx_ring, tx_flags, count); 5932 /* Make sure there is space in the ring for the next send. */ 5933 e1000_maybe_stop_tx(tx_ring, 5934 ((MAX_SKB_FRAGS + 1) * 5935 DIV_ROUND_UP(PAGE_SIZE, 5936 adapter->tx_fifo_limit) + 4)); 5937 5938 if (!netdev_xmit_more() || 5939 netif_xmit_stopped(netdev_get_tx_queue(netdev, 0))) { 5940 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 5941 e1000e_update_tdt_wa(tx_ring, 5942 tx_ring->next_to_use); 5943 else 5944 writel(tx_ring->next_to_use, tx_ring->tail); 5945 } 5946 } else { 5947 dev_kfree_skb_any(skb); 5948 tx_ring->buffer_info[first].time_stamp = 0; 5949 tx_ring->next_to_use = first; 5950 } 5951 5952 return NETDEV_TX_OK; 5953 } 5954 5955 /** 5956 * e1000_tx_timeout - Respond to a Tx Hang 5957 * @netdev: network interface device structure 5958 * @txqueue: index of the hung queue (unused) 5959 **/ 5960 static void e1000_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue) 5961 { 5962 struct e1000_adapter *adapter = netdev_priv(netdev); 5963 5964 /* Do the reset outside of interrupt context */ 5965 adapter->tx_timeout_count++; 5966 schedule_work(&adapter->reset_task); 5967 } 5968 5969 static void e1000_reset_task(struct work_struct *work) 5970 { 5971 struct e1000_adapter *adapter; 5972 adapter = container_of(work, struct e1000_adapter, reset_task); 5973 5974 rtnl_lock(); 5975 /* don't run the task if already down */ 5976 if (test_bit(__E1000_DOWN, &adapter->state)) { 5977 rtnl_unlock(); 5978 return; 5979 } 5980 5981 if (!(adapter->flags & FLAG_RESTART_NOW)) { 5982 e1000e_dump(adapter); 5983 e_err("Reset adapter unexpectedly\n"); 5984 } 5985 e1000e_reinit_locked(adapter); 5986 rtnl_unlock(); 5987 } 5988 5989 /** 5990 * e1000e_get_stats64 - Get System Network Statistics 5991 * @netdev: network interface device structure 5992 * @stats: rtnl_link_stats64 pointer 5993 * 5994 * Returns the address of the device statistics structure. 5995 **/ 5996 void e1000e_get_stats64(struct net_device *netdev, 5997 struct rtnl_link_stats64 *stats) 5998 { 5999 struct e1000_adapter *adapter = netdev_priv(netdev); 6000 6001 spin_lock(&adapter->stats64_lock); 6002 e1000e_update_stats(adapter); 6003 /* Fill out the OS statistics structure */ 6004 stats->rx_bytes = adapter->stats.gorc; 6005 stats->rx_packets = adapter->stats.gprc; 6006 stats->tx_bytes = adapter->stats.gotc; 6007 stats->tx_packets = adapter->stats.gptc; 6008 stats->multicast = adapter->stats.mprc; 6009 stats->collisions = adapter->stats.colc; 6010 6011 /* Rx Errors */ 6012 6013 /* RLEC on some newer hardware can be incorrect so build 6014 * our own version based on RUC and ROC 6015 */ 6016 stats->rx_errors = adapter->stats.rxerrc + 6017 adapter->stats.crcerrs + adapter->stats.algnerrc + 6018 adapter->stats.ruc + adapter->stats.roc + adapter->stats.cexterr; 6019 stats->rx_length_errors = adapter->stats.ruc + adapter->stats.roc; 6020 stats->rx_crc_errors = adapter->stats.crcerrs; 6021 stats->rx_frame_errors = adapter->stats.algnerrc; 6022 stats->rx_missed_errors = adapter->stats.mpc; 6023 6024 /* Tx Errors */ 6025 stats->tx_errors = adapter->stats.ecol + adapter->stats.latecol; 6026 stats->tx_aborted_errors = adapter->stats.ecol; 6027 stats->tx_window_errors = adapter->stats.latecol; 6028 stats->tx_carrier_errors = adapter->stats.tncrs; 6029 6030 /* Tx Dropped needs to be maintained elsewhere */ 6031 6032 spin_unlock(&adapter->stats64_lock); 6033 } 6034 6035 /** 6036 * e1000_change_mtu - Change the Maximum Transfer Unit 6037 * @netdev: network interface device structure 6038 * @new_mtu: new value for maximum frame size 6039 * 6040 * Returns 0 on success, negative on failure 6041 **/ 6042 static int e1000_change_mtu(struct net_device *netdev, int new_mtu) 6043 { 6044 struct e1000_adapter *adapter = netdev_priv(netdev); 6045 int max_frame = new_mtu + VLAN_ETH_HLEN + ETH_FCS_LEN; 6046 6047 /* Jumbo frame support */ 6048 if ((new_mtu > ETH_DATA_LEN) && 6049 !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) { 6050 e_err("Jumbo Frames not supported.\n"); 6051 return -EINVAL; 6052 } 6053 6054 /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */ 6055 if ((adapter->hw.mac.type >= e1000_pch2lan) && 6056 !(adapter->flags2 & FLAG2_CRC_STRIPPING) && 6057 (new_mtu > ETH_DATA_LEN)) { 6058 e_err("Jumbo Frames not supported on this device when CRC stripping is disabled.\n"); 6059 return -EINVAL; 6060 } 6061 6062 while (test_and_set_bit(__E1000_RESETTING, &adapter->state)) 6063 usleep_range(1000, 1100); 6064 /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */ 6065 adapter->max_frame_size = max_frame; 6066 netdev_dbg(netdev, "changing MTU from %d to %d\n", 6067 netdev->mtu, new_mtu); 6068 WRITE_ONCE(netdev->mtu, new_mtu); 6069 6070 pm_runtime_get_sync(netdev->dev.parent); 6071 6072 if (netif_running(netdev)) 6073 e1000e_down(adapter, true); 6074 6075 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN 6076 * means we reserve 2 more, this pushes us to allocate from the next 6077 * larger slab size. 6078 * i.e. RXBUFFER_2048 --> size-4096 slab 6079 * However with the new *_jumbo_rx* routines, jumbo receives will use 6080 * fragmented skbs 6081 */ 6082 6083 if (max_frame <= 2048) 6084 adapter->rx_buffer_len = 2048; 6085 else 6086 adapter->rx_buffer_len = 4096; 6087 6088 /* adjust allocation if LPE protects us, and we aren't using SBP */ 6089 if (max_frame <= (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)) 6090 adapter->rx_buffer_len = VLAN_ETH_FRAME_LEN + ETH_FCS_LEN; 6091 6092 if (netif_running(netdev)) 6093 e1000e_up(adapter); 6094 else 6095 e1000e_reset(adapter); 6096 6097 pm_runtime_put_sync(netdev->dev.parent); 6098 6099 clear_bit(__E1000_RESETTING, &adapter->state); 6100 6101 return 0; 6102 } 6103 6104 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 6105 { 6106 struct e1000_adapter *adapter = netdev_priv(netdev); 6107 struct mii_ioctl_data *data = if_mii(ifr); 6108 6109 if (adapter->hw.phy.media_type != e1000_media_type_copper) 6110 return -EOPNOTSUPP; 6111 6112 switch (cmd) { 6113 case SIOCGMIIPHY: 6114 data->phy_id = adapter->hw.phy.addr; 6115 break; 6116 case SIOCGMIIREG: 6117 e1000_phy_read_status(adapter); 6118 6119 switch (data->reg_num & 0x1F) { 6120 case MII_BMCR: 6121 data->val_out = adapter->phy_regs.bmcr; 6122 break; 6123 case MII_BMSR: 6124 data->val_out = adapter->phy_regs.bmsr; 6125 break; 6126 case MII_PHYSID1: 6127 data->val_out = (adapter->hw.phy.id >> 16); 6128 break; 6129 case MII_PHYSID2: 6130 data->val_out = (adapter->hw.phy.id & 0xFFFF); 6131 break; 6132 case MII_ADVERTISE: 6133 data->val_out = adapter->phy_regs.advertise; 6134 break; 6135 case MII_LPA: 6136 data->val_out = adapter->phy_regs.lpa; 6137 break; 6138 case MII_EXPANSION: 6139 data->val_out = adapter->phy_regs.expansion; 6140 break; 6141 case MII_CTRL1000: 6142 data->val_out = adapter->phy_regs.ctrl1000; 6143 break; 6144 case MII_STAT1000: 6145 data->val_out = adapter->phy_regs.stat1000; 6146 break; 6147 case MII_ESTATUS: 6148 data->val_out = adapter->phy_regs.estatus; 6149 break; 6150 default: 6151 return -EIO; 6152 } 6153 break; 6154 case SIOCSMIIREG: 6155 default: 6156 return -EOPNOTSUPP; 6157 } 6158 return 0; 6159 } 6160 6161 /** 6162 * e1000e_hwtstamp_set - control hardware time stamping 6163 * @netdev: network interface device structure 6164 * @config: timestamp configuration 6165 * @extack: netlink extended ACK report 6166 * 6167 * Outgoing time stamping can be enabled and disabled. Play nice and 6168 * disable it when requested, although it shouldn't cause any overhead 6169 * when no packet needs it. At most one packet in the queue may be 6170 * marked for time stamping, otherwise it would be impossible to tell 6171 * for sure to which packet the hardware time stamp belongs. 6172 * 6173 * Incoming time stamping has to be configured via the hardware filters. 6174 * Not all combinations are supported, in particular event type has to be 6175 * specified. Matching the kind of event packet is not supported, with the 6176 * exception of "all V2 events regardless of level 2 or 4". 6177 **/ 6178 static int e1000e_hwtstamp_set(struct net_device *netdev, 6179 struct kernel_hwtstamp_config *config, 6180 struct netlink_ext_ack *extack) 6181 { 6182 struct e1000_adapter *adapter = netdev_priv(netdev); 6183 int ret_val; 6184 6185 ret_val = e1000e_config_hwtstamp(adapter, config, extack); 6186 if (ret_val) 6187 return ret_val; 6188 6189 switch (config->rx_filter) { 6190 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 6191 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 6192 case HWTSTAMP_FILTER_PTP_V2_SYNC: 6193 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 6194 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 6195 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 6196 /* With V2 type filters which specify a Sync or Delay Request, 6197 * Path Delay Request/Response messages are also time stamped 6198 * by hardware so notify the caller the requested packets plus 6199 * some others are time stamped. 6200 */ 6201 config->rx_filter = HWTSTAMP_FILTER_SOME; 6202 break; 6203 default: 6204 break; 6205 } 6206 6207 return 0; 6208 } 6209 6210 static int e1000e_hwtstamp_get(struct net_device *netdev, 6211 struct kernel_hwtstamp_config *kernel_config) 6212 { 6213 struct e1000_adapter *adapter = netdev_priv(netdev); 6214 6215 *kernel_config = adapter->hwtstamp_config; 6216 6217 return 0; 6218 } 6219 6220 static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc) 6221 { 6222 struct e1000_hw *hw = &adapter->hw; 6223 u32 i, mac_reg, wuc; 6224 u16 phy_reg, wuc_enable; 6225 int retval; 6226 6227 /* copy MAC RARs to PHY RARs */ 6228 e1000_copy_rx_addrs_to_phy_ich8lan(hw); 6229 6230 retval = hw->phy.ops.acquire(hw); 6231 if (retval) { 6232 e_err("Could not acquire PHY\n"); 6233 return retval; 6234 } 6235 6236 /* Enable access to wakeup registers on and set page to BM_WUC_PAGE */ 6237 retval = e1000_enable_phy_wakeup_reg_access_bm(hw, &wuc_enable); 6238 if (retval) 6239 goto release; 6240 6241 /* copy MAC MTA to PHY MTA - only needed for pchlan */ 6242 for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) { 6243 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i); 6244 hw->phy.ops.write_reg_page(hw, BM_MTA(i), 6245 (u16)(mac_reg & 0xFFFF)); 6246 hw->phy.ops.write_reg_page(hw, BM_MTA(i) + 1, 6247 (u16)((mac_reg >> 16) & 0xFFFF)); 6248 } 6249 6250 /* configure PHY Rx Control register */ 6251 hw->phy.ops.read_reg_page(&adapter->hw, BM_RCTL, &phy_reg); 6252 mac_reg = er32(RCTL); 6253 if (mac_reg & E1000_RCTL_UPE) 6254 phy_reg |= BM_RCTL_UPE; 6255 if (mac_reg & E1000_RCTL_MPE) 6256 phy_reg |= BM_RCTL_MPE; 6257 phy_reg &= ~(BM_RCTL_MO_MASK); 6258 if (mac_reg & E1000_RCTL_MO_3) 6259 phy_reg |= (FIELD_GET(E1000_RCTL_MO_3, mac_reg) 6260 << BM_RCTL_MO_SHIFT); 6261 if (mac_reg & E1000_RCTL_BAM) 6262 phy_reg |= BM_RCTL_BAM; 6263 if (mac_reg & E1000_RCTL_PMCF) 6264 phy_reg |= BM_RCTL_PMCF; 6265 mac_reg = er32(CTRL); 6266 if (mac_reg & E1000_CTRL_RFCE) 6267 phy_reg |= BM_RCTL_RFCE; 6268 hw->phy.ops.write_reg_page(&adapter->hw, BM_RCTL, phy_reg); 6269 6270 wuc = E1000_WUC_PME_EN; 6271 if (wufc & (E1000_WUFC_MAG | E1000_WUFC_LNKC)) 6272 wuc |= E1000_WUC_APME; 6273 6274 /* enable PHY wakeup in MAC register */ 6275 ew32(WUFC, wufc); 6276 ew32(WUC, (E1000_WUC_PHY_WAKE | E1000_WUC_APMPME | 6277 E1000_WUC_PME_STATUS | wuc)); 6278 6279 /* configure and enable PHY wakeup in PHY registers */ 6280 hw->phy.ops.write_reg_page(&adapter->hw, BM_WUFC, wufc); 6281 hw->phy.ops.write_reg_page(&adapter->hw, BM_WUC, wuc); 6282 6283 /* activate PHY wakeup */ 6284 wuc_enable |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT; 6285 retval = e1000_disable_phy_wakeup_reg_access_bm(hw, &wuc_enable); 6286 if (retval) 6287 e_err("Could not set PHY Host Wakeup bit\n"); 6288 release: 6289 hw->phy.ops.release(hw); 6290 6291 return retval; 6292 } 6293 6294 static void e1000e_flush_lpic(struct pci_dev *pdev) 6295 { 6296 struct net_device *netdev = pci_get_drvdata(pdev); 6297 struct e1000_adapter *adapter = netdev_priv(netdev); 6298 struct e1000_hw *hw = &adapter->hw; 6299 u32 ret_val; 6300 6301 pm_runtime_get_sync(netdev->dev.parent); 6302 6303 ret_val = hw->phy.ops.acquire(hw); 6304 if (ret_val) 6305 goto fl_out; 6306 6307 pr_info("EEE TX LPI TIMER: %08X\n", 6308 er32(LPIC) >> E1000_LPIC_LPIET_SHIFT); 6309 6310 hw->phy.ops.release(hw); 6311 6312 fl_out: 6313 pm_runtime_put_sync(netdev->dev.parent); 6314 } 6315 6316 /* S0ix implementation */ 6317 static void e1000e_s0ix_entry_flow(struct e1000_adapter *adapter) 6318 { 6319 struct e1000_hw *hw = &adapter->hw; 6320 u32 mac_data; 6321 u16 phy_data; 6322 6323 if (er32(FWSM) & E1000_ICH_FWSM_FW_VALID && 6324 hw->mac.type >= e1000_pch_adp) { 6325 /* Request ME configure the device for S0ix */ 6326 mac_data = er32(H2ME); 6327 mac_data |= E1000_H2ME_START_DPG; 6328 mac_data &= ~E1000_H2ME_EXIT_DPG; 6329 trace_e1000e_trace_mac_register(mac_data); 6330 ew32(H2ME, mac_data); 6331 } else { 6332 /* Request driver configure the device to S0ix */ 6333 /* Disable the periodic inband message, 6334 * don't request PCIe clock in K1 page770_17[10:9] = 10b 6335 */ 6336 e1e_rphy(hw, HV_PM_CTRL, &phy_data); 6337 phy_data &= ~HV_PM_CTRL_K1_CLK_REQ; 6338 phy_data |= BIT(10); 6339 e1e_wphy(hw, HV_PM_CTRL, phy_data); 6340 6341 /* Make sure we don't exit K1 every time a new packet arrives 6342 * 772_29[5] = 1 CS_Mode_Stay_In_K1 6343 */ 6344 e1e_rphy(hw, I217_CGFREG, &phy_data); 6345 phy_data |= BIT(5); 6346 e1e_wphy(hw, I217_CGFREG, phy_data); 6347 6348 /* Change the MAC/PHY interface to SMBus 6349 * Force the SMBus in PHY page769_23[0] = 1 6350 * Force the SMBus in MAC CTRL_EXT[11] = 1 6351 */ 6352 e1e_rphy(hw, CV_SMB_CTRL, &phy_data); 6353 phy_data |= CV_SMB_CTRL_FORCE_SMBUS; 6354 e1e_wphy(hw, CV_SMB_CTRL, phy_data); 6355 mac_data = er32(CTRL_EXT); 6356 mac_data |= E1000_CTRL_EXT_FORCE_SMBUS; 6357 ew32(CTRL_EXT, mac_data); 6358 6359 /* DFT control: PHY bit: page769_20[0] = 1 6360 * page769_20[7] - PHY PLL stop 6361 * page769_20[8] - PHY go to the electrical idle 6362 * page769_20[9] - PHY serdes disable 6363 * Gate PPW via EXTCNF_CTRL - set 0x0F00[7] = 1 6364 */ 6365 e1e_rphy(hw, I82579_DFT_CTRL, &phy_data); 6366 phy_data |= BIT(0); 6367 phy_data |= BIT(7); 6368 phy_data |= BIT(8); 6369 phy_data |= BIT(9); 6370 e1e_wphy(hw, I82579_DFT_CTRL, phy_data); 6371 6372 mac_data = er32(EXTCNF_CTRL); 6373 mac_data |= E1000_EXTCNF_CTRL_GATE_PHY_CFG; 6374 ew32(EXTCNF_CTRL, mac_data); 6375 6376 /* Disable disconnected cable conditioning for Power Gating */ 6377 mac_data = er32(DPGFR); 6378 mac_data |= BIT(2); 6379 ew32(DPGFR, mac_data); 6380 6381 /* Enable the Dynamic Clock Gating in the DMA and MAC */ 6382 mac_data = er32(CTRL_EXT); 6383 mac_data |= E1000_CTRL_EXT_DMA_DYN_CLK_EN; 6384 ew32(CTRL_EXT, mac_data); 6385 } 6386 6387 /* Enable the Dynamic Power Gating in the MAC */ 6388 mac_data = er32(FEXTNVM7); 6389 mac_data |= BIT(22); 6390 ew32(FEXTNVM7, mac_data); 6391 6392 /* Don't wake from dynamic Power Gating with clock request */ 6393 mac_data = er32(FEXTNVM12); 6394 mac_data |= BIT(12); 6395 ew32(FEXTNVM12, mac_data); 6396 6397 /* Ungate PGCB clock */ 6398 mac_data = er32(FEXTNVM9); 6399 mac_data &= ~BIT(28); 6400 ew32(FEXTNVM9, mac_data); 6401 6402 /* Enable K1 off to enable mPHY Power Gating */ 6403 mac_data = er32(FEXTNVM6); 6404 mac_data |= BIT(31); 6405 ew32(FEXTNVM6, mac_data); 6406 6407 /* Enable mPHY power gating for any link and speed */ 6408 mac_data = er32(FEXTNVM8); 6409 mac_data |= BIT(9); 6410 ew32(FEXTNVM8, mac_data); 6411 6412 /* No MAC DPG gating SLP_S0 in modern standby 6413 * Switch the logic of the lanphypc to use PMC counter 6414 */ 6415 mac_data = er32(FEXTNVM5); 6416 mac_data |= BIT(7); 6417 ew32(FEXTNVM5, mac_data); 6418 6419 /* Disable the time synchronization clock */ 6420 mac_data = er32(FEXTNVM7); 6421 mac_data |= BIT(31); 6422 mac_data &= ~BIT(0); 6423 ew32(FEXTNVM7, mac_data); 6424 6425 /* Dynamic Power Gating Enable */ 6426 mac_data = er32(CTRL_EXT); 6427 mac_data |= BIT(3); 6428 ew32(CTRL_EXT, mac_data); 6429 6430 /* Check MAC Tx/Rx packet buffer pointers. 6431 * Reset MAC Tx/Rx packet buffer pointers to suppress any 6432 * pending traffic indication that would prevent power gating. 6433 */ 6434 mac_data = er32(TDFH); 6435 if (mac_data) 6436 ew32(TDFH, 0); 6437 mac_data = er32(TDFT); 6438 if (mac_data) 6439 ew32(TDFT, 0); 6440 mac_data = er32(TDFHS); 6441 if (mac_data) 6442 ew32(TDFHS, 0); 6443 mac_data = er32(TDFTS); 6444 if (mac_data) 6445 ew32(TDFTS, 0); 6446 mac_data = er32(TDFPC); 6447 if (mac_data) 6448 ew32(TDFPC, 0); 6449 mac_data = er32(RDFH); 6450 if (mac_data) 6451 ew32(RDFH, 0); 6452 mac_data = er32(RDFT); 6453 if (mac_data) 6454 ew32(RDFT, 0); 6455 mac_data = er32(RDFHS); 6456 if (mac_data) 6457 ew32(RDFHS, 0); 6458 mac_data = er32(RDFTS); 6459 if (mac_data) 6460 ew32(RDFTS, 0); 6461 mac_data = er32(RDFPC); 6462 if (mac_data) 6463 ew32(RDFPC, 0); 6464 } 6465 6466 static void e1000e_s0ix_exit_flow(struct e1000_adapter *adapter) 6467 { 6468 struct e1000_hw *hw = &adapter->hw; 6469 bool firmware_bug = false; 6470 u32 mac_data; 6471 u16 phy_data; 6472 u32 i = 0; 6473 6474 if (er32(FWSM) & E1000_ICH_FWSM_FW_VALID && 6475 hw->mac.type >= e1000_pch_adp) { 6476 /* Keep the GPT clock enabled for CSME */ 6477 mac_data = er32(FEXTNVM); 6478 mac_data |= BIT(3); 6479 ew32(FEXTNVM, mac_data); 6480 /* Request ME unconfigure the device from S0ix */ 6481 mac_data = er32(H2ME); 6482 mac_data &= ~E1000_H2ME_START_DPG; 6483 mac_data |= E1000_H2ME_EXIT_DPG; 6484 trace_e1000e_trace_mac_register(mac_data); 6485 ew32(H2ME, mac_data); 6486 6487 /* Poll up to 2.5 seconds for ME to unconfigure DPG. 6488 * If this takes more than 1 second, show a warning indicating a 6489 * firmware bug 6490 */ 6491 while (!(er32(EXFWSM) & E1000_EXFWSM_DPG_EXIT_DONE)) { 6492 if (i > 100 && !firmware_bug) 6493 firmware_bug = true; 6494 6495 if (i++ == 250) { 6496 e_dbg("Timeout (firmware bug): %d msec\n", 6497 i * 10); 6498 break; 6499 } 6500 6501 usleep_range(10000, 11000); 6502 } 6503 if (firmware_bug) 6504 e_warn("DPG_EXIT_DONE took %d msec. This is a firmware bug\n", 6505 i * 10); 6506 else 6507 e_dbg("DPG_EXIT_DONE cleared after %d msec\n", i * 10); 6508 } else { 6509 /* Request driver unconfigure the device from S0ix */ 6510 6511 /* Cancel disable disconnected cable conditioning 6512 * for Power Gating 6513 */ 6514 mac_data = er32(DPGFR); 6515 mac_data &= ~BIT(2); 6516 ew32(DPGFR, mac_data); 6517 6518 /* Disable the Dynamic Clock Gating in the DMA and MAC */ 6519 mac_data = er32(CTRL_EXT); 6520 mac_data &= 0xFFF7FFFF; 6521 ew32(CTRL_EXT, mac_data); 6522 6523 /* Enable the periodic inband message, 6524 * Request PCIe clock in K1 page770_17[10:9] =01b 6525 */ 6526 e1e_rphy(hw, HV_PM_CTRL, &phy_data); 6527 phy_data &= 0xFBFF; 6528 phy_data |= HV_PM_CTRL_K1_CLK_REQ; 6529 e1e_wphy(hw, HV_PM_CTRL, phy_data); 6530 6531 /* Return back configuration 6532 * 772_29[5] = 0 CS_Mode_Stay_In_K1 6533 */ 6534 e1e_rphy(hw, I217_CGFREG, &phy_data); 6535 phy_data &= 0xFFDF; 6536 e1e_wphy(hw, I217_CGFREG, phy_data); 6537 6538 /* Change the MAC/PHY interface to Kumeran 6539 * Unforce the SMBus in PHY page769_23[0] = 0 6540 * Unforce the SMBus in MAC CTRL_EXT[11] = 0 6541 */ 6542 e1e_rphy(hw, CV_SMB_CTRL, &phy_data); 6543 phy_data &= ~CV_SMB_CTRL_FORCE_SMBUS; 6544 e1e_wphy(hw, CV_SMB_CTRL, phy_data); 6545 mac_data = er32(CTRL_EXT); 6546 mac_data &= ~E1000_CTRL_EXT_FORCE_SMBUS; 6547 ew32(CTRL_EXT, mac_data); 6548 } 6549 6550 /* Disable Dynamic Power Gating */ 6551 mac_data = er32(CTRL_EXT); 6552 mac_data &= 0xFFFFFFF7; 6553 ew32(CTRL_EXT, mac_data); 6554 6555 /* Enable the time synchronization clock */ 6556 mac_data = er32(FEXTNVM7); 6557 mac_data &= ~BIT(31); 6558 mac_data |= BIT(0); 6559 ew32(FEXTNVM7, mac_data); 6560 6561 /* Disable the Dynamic Power Gating in the MAC */ 6562 mac_data = er32(FEXTNVM7); 6563 mac_data &= 0xFFBFFFFF; 6564 ew32(FEXTNVM7, mac_data); 6565 6566 /* Disable mPHY power gating for any link and speed */ 6567 mac_data = er32(FEXTNVM8); 6568 mac_data &= ~BIT(9); 6569 ew32(FEXTNVM8, mac_data); 6570 6571 /* Disable K1 off */ 6572 mac_data = er32(FEXTNVM6); 6573 mac_data &= ~BIT(31); 6574 ew32(FEXTNVM6, mac_data); 6575 6576 /* Disable Ungate PGCB clock */ 6577 mac_data = er32(FEXTNVM9); 6578 mac_data |= BIT(28); 6579 ew32(FEXTNVM9, mac_data); 6580 6581 /* Cancel not waking from dynamic 6582 * Power Gating with clock request 6583 */ 6584 mac_data = er32(FEXTNVM12); 6585 mac_data &= ~BIT(12); 6586 ew32(FEXTNVM12, mac_data); 6587 6588 /* Revert the lanphypc logic to use the internal Gbe counter 6589 * and not the PMC counter 6590 */ 6591 mac_data = er32(FEXTNVM5); 6592 mac_data &= 0xFFFFFF7F; 6593 ew32(FEXTNVM5, mac_data); 6594 } 6595 6596 static int e1000e_pm_freeze(struct device *dev) 6597 { 6598 struct net_device *netdev = dev_get_drvdata(dev); 6599 struct e1000_adapter *adapter = netdev_priv(netdev); 6600 bool present; 6601 6602 rtnl_lock(); 6603 6604 present = netif_device_present(netdev); 6605 netif_device_detach(netdev); 6606 6607 if (present && netif_running(netdev)) { 6608 int count = E1000_CHECK_RESET_COUNT; 6609 6610 while (test_bit(__E1000_RESETTING, &adapter->state) && count--) 6611 usleep_range(10000, 11000); 6612 6613 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state)); 6614 6615 /* Quiesce the device without resetting the hardware */ 6616 e1000e_down(adapter, false); 6617 e1000_free_irq(adapter); 6618 } 6619 rtnl_unlock(); 6620 6621 e1000e_reset_interrupt_capability(adapter); 6622 6623 /* Allow time for pending master requests to run */ 6624 e1000e_disable_pcie_master(&adapter->hw); 6625 6626 return 0; 6627 } 6628 6629 static int __e1000_shutdown(struct pci_dev *pdev, bool runtime) 6630 { 6631 struct net_device *netdev = pci_get_drvdata(pdev); 6632 struct e1000_adapter *adapter = netdev_priv(netdev); 6633 struct e1000_hw *hw = &adapter->hw; 6634 u32 ctrl, ctrl_ext, rctl, status, wufc; 6635 int retval = 0; 6636 6637 /* Runtime suspend should only enable wakeup for link changes */ 6638 if (runtime) 6639 wufc = E1000_WUFC_LNKC; 6640 else if (device_may_wakeup(&pdev->dev)) 6641 wufc = adapter->wol; 6642 else 6643 wufc = 0; 6644 6645 status = er32(STATUS); 6646 if (status & E1000_STATUS_LU) 6647 wufc &= ~E1000_WUFC_LNKC; 6648 6649 if (wufc) { 6650 e1000_setup_rctl(adapter); 6651 e1000e_set_rx_mode(netdev); 6652 6653 /* turn on all-multi mode if wake on multicast is enabled */ 6654 if (wufc & E1000_WUFC_MC) { 6655 rctl = er32(RCTL); 6656 rctl |= E1000_RCTL_MPE; 6657 ew32(RCTL, rctl); 6658 } 6659 6660 ctrl = er32(CTRL); 6661 ctrl |= E1000_CTRL_ADVD3WUC; 6662 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP)) 6663 ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT; 6664 ew32(CTRL, ctrl); 6665 6666 if (adapter->hw.phy.media_type == e1000_media_type_fiber || 6667 adapter->hw.phy.media_type == 6668 e1000_media_type_internal_serdes) { 6669 /* keep the laser running in D3 */ 6670 ctrl_ext = er32(CTRL_EXT); 6671 ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA; 6672 ew32(CTRL_EXT, ctrl_ext); 6673 } 6674 6675 if (!runtime) 6676 e1000e_power_up_phy(adapter); 6677 6678 if (adapter->flags & FLAG_IS_ICH) 6679 e1000_suspend_workarounds_ich8lan(&adapter->hw); 6680 6681 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) { 6682 /* enable wakeup by the PHY */ 6683 retval = e1000_init_phy_wakeup(adapter, wufc); 6684 if (retval) { 6685 e_err("Failed to enable wakeup\n"); 6686 goto skip_phy_configurations; 6687 } 6688 } else { 6689 /* enable wakeup by the MAC */ 6690 ew32(WUFC, wufc); 6691 ew32(WUC, E1000_WUC_PME_EN); 6692 } 6693 } else { 6694 ew32(WUC, 0); 6695 ew32(WUFC, 0); 6696 6697 e1000_power_down_phy(adapter); 6698 } 6699 6700 if (adapter->hw.phy.type == e1000_phy_igp_3) { 6701 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw); 6702 } else if (hw->mac.type >= e1000_pch_lpt) { 6703 if (wufc && !(wufc & (E1000_WUFC_EX | E1000_WUFC_MC | E1000_WUFC_BC))) { 6704 /* ULP does not support wake from unicast, multicast 6705 * or broadcast. 6706 */ 6707 retval = e1000_enable_ulp_lpt_lp(hw, !runtime); 6708 if (retval) { 6709 e_err("Failed to enable ULP\n"); 6710 goto skip_phy_configurations; 6711 } 6712 } 6713 } 6714 6715 /* Ensure that the appropriate bits are set in LPI_CTRL 6716 * for EEE in Sx 6717 */ 6718 if ((hw->phy.type >= e1000_phy_i217) && 6719 adapter->eee_advert && hw->dev_spec.ich8lan.eee_lp_ability) { 6720 u16 lpi_ctrl = 0; 6721 6722 retval = hw->phy.ops.acquire(hw); 6723 if (!retval) { 6724 retval = e1e_rphy_locked(hw, I82579_LPI_CTRL, 6725 &lpi_ctrl); 6726 if (!retval) { 6727 if (adapter->eee_advert & 6728 hw->dev_spec.ich8lan.eee_lp_ability & 6729 I82579_EEE_100_SUPPORTED) 6730 lpi_ctrl |= I82579_LPI_CTRL_100_ENABLE; 6731 if (adapter->eee_advert & 6732 hw->dev_spec.ich8lan.eee_lp_ability & 6733 I82579_EEE_1000_SUPPORTED) 6734 lpi_ctrl |= I82579_LPI_CTRL_1000_ENABLE; 6735 6736 retval = e1e_wphy_locked(hw, I82579_LPI_CTRL, 6737 lpi_ctrl); 6738 } 6739 } 6740 hw->phy.ops.release(hw); 6741 } 6742 6743 skip_phy_configurations: 6744 /* Release control of h/w to f/w. If f/w is AMT enabled, this 6745 * would have already happened in close and is redundant. 6746 */ 6747 e1000e_release_hw_control(adapter); 6748 6749 pci_clear_master(pdev); 6750 6751 /* The pci-e switch on some quad port adapters will report a 6752 * correctable error when the MAC transitions from D0 to D3. To 6753 * prevent this we need to mask off the correctable errors on the 6754 * downstream port of the pci-e switch. 6755 * 6756 * We don't have the associated upstream bridge while assigning 6757 * the PCI device into guest. For example, the KVM on power is 6758 * one of the cases. 6759 */ 6760 if (adapter->flags & FLAG_IS_QUAD_PORT) { 6761 struct pci_dev *us_dev = pdev->bus->self; 6762 u16 devctl; 6763 6764 if (!us_dev) 6765 return 0; 6766 6767 pcie_capability_read_word(us_dev, PCI_EXP_DEVCTL, &devctl); 6768 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL, 6769 (devctl & ~PCI_EXP_DEVCTL_CERE)); 6770 6771 pci_save_state(pdev); 6772 pci_prepare_to_sleep(pdev); 6773 6774 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL, devctl); 6775 } 6776 6777 return 0; 6778 } 6779 6780 /** 6781 * __e1000e_disable_aspm - Disable ASPM states 6782 * @pdev: pointer to PCI device struct 6783 * @state: bit-mask of ASPM states to disable 6784 * @locked: indication if this context holds pci_bus_sem locked. 6785 * 6786 * Some devices *must* have certain ASPM states disabled per hardware errata. 6787 **/ 6788 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state, int locked) 6789 { 6790 struct pci_dev *parent = pdev->bus->self; 6791 u16 aspm_dis_mask = 0; 6792 u16 pdev_aspmc, parent_aspmc; 6793 6794 switch (state) { 6795 case PCIE_LINK_STATE_L0S: 6796 case PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1: 6797 aspm_dis_mask |= PCI_EXP_LNKCTL_ASPM_L0S; 6798 fallthrough; /* can't have L1 without L0s */ 6799 case PCIE_LINK_STATE_L1: 6800 aspm_dis_mask |= PCI_EXP_LNKCTL_ASPM_L1; 6801 break; 6802 default: 6803 return; 6804 } 6805 6806 pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &pdev_aspmc); 6807 pdev_aspmc &= PCI_EXP_LNKCTL_ASPMC; 6808 6809 if (parent) { 6810 pcie_capability_read_word(parent, PCI_EXP_LNKCTL, 6811 &parent_aspmc); 6812 parent_aspmc &= PCI_EXP_LNKCTL_ASPMC; 6813 } 6814 6815 /* Nothing to do if the ASPM states to be disabled already are */ 6816 if (!(pdev_aspmc & aspm_dis_mask) && 6817 (!parent || !(parent_aspmc & aspm_dis_mask))) 6818 return; 6819 6820 dev_info(&pdev->dev, "Disabling ASPM %s %s\n", 6821 (aspm_dis_mask & pdev_aspmc & PCI_EXP_LNKCTL_ASPM_L0S) ? 6822 "L0s" : "", 6823 (aspm_dis_mask & pdev_aspmc & PCI_EXP_LNKCTL_ASPM_L1) ? 6824 "L1" : ""); 6825 6826 #ifdef CONFIG_PCIEASPM 6827 if (locked) 6828 pci_disable_link_state_locked(pdev, state); 6829 else 6830 pci_disable_link_state(pdev, state); 6831 6832 /* Double-check ASPM control. If not disabled by the above, the 6833 * BIOS is preventing that from happening (or CONFIG_PCIEASPM is 6834 * not enabled); override by writing PCI config space directly. 6835 */ 6836 pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &pdev_aspmc); 6837 pdev_aspmc &= PCI_EXP_LNKCTL_ASPMC; 6838 6839 if (!(aspm_dis_mask & pdev_aspmc)) 6840 return; 6841 #endif 6842 6843 /* Both device and parent should have the same ASPM setting. 6844 * Disable ASPM in downstream component first and then upstream. 6845 */ 6846 pcie_capability_clear_word(pdev, PCI_EXP_LNKCTL, aspm_dis_mask); 6847 6848 if (parent) 6849 pcie_capability_clear_word(parent, PCI_EXP_LNKCTL, 6850 aspm_dis_mask); 6851 } 6852 6853 /** 6854 * e1000e_disable_aspm - Disable ASPM states. 6855 * @pdev: pointer to PCI device struct 6856 * @state: bit-mask of ASPM states to disable 6857 * 6858 * This function acquires the pci_bus_sem! 6859 * Some devices *must* have certain ASPM states disabled per hardware errata. 6860 **/ 6861 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state) 6862 { 6863 __e1000e_disable_aspm(pdev, state, 0); 6864 } 6865 6866 /** 6867 * e1000e_disable_aspm_locked - Disable ASPM states. 6868 * @pdev: pointer to PCI device struct 6869 * @state: bit-mask of ASPM states to disable 6870 * 6871 * This function must be called with pci_bus_sem acquired! 6872 * Some devices *must* have certain ASPM states disabled per hardware errata. 6873 **/ 6874 static void e1000e_disable_aspm_locked(struct pci_dev *pdev, u16 state) 6875 { 6876 __e1000e_disable_aspm(pdev, state, 1); 6877 } 6878 6879 static int e1000e_pm_thaw(struct device *dev) 6880 { 6881 struct net_device *netdev = dev_get_drvdata(dev); 6882 struct e1000_adapter *adapter = netdev_priv(netdev); 6883 int rc = 0; 6884 6885 e1000e_set_interrupt_capability(adapter); 6886 6887 rtnl_lock(); 6888 if (netif_running(netdev)) { 6889 rc = e1000_request_irq(adapter); 6890 if (rc) 6891 goto err_irq; 6892 6893 e1000e_up(adapter); 6894 } 6895 6896 netif_device_attach(netdev); 6897 err_irq: 6898 rtnl_unlock(); 6899 6900 return rc; 6901 } 6902 6903 static int __e1000_resume(struct pci_dev *pdev) 6904 { 6905 struct net_device *netdev = pci_get_drvdata(pdev); 6906 struct e1000_adapter *adapter = netdev_priv(netdev); 6907 struct e1000_hw *hw = &adapter->hw; 6908 u16 aspm_disable_flag = 0; 6909 6910 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S) 6911 aspm_disable_flag = PCIE_LINK_STATE_L0S; 6912 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1) 6913 aspm_disable_flag |= PCIE_LINK_STATE_L1; 6914 if (aspm_disable_flag) 6915 e1000e_disable_aspm(pdev, aspm_disable_flag); 6916 6917 pci_set_master(pdev); 6918 6919 if (hw->mac.type >= e1000_pch2lan) 6920 e1000_resume_workarounds_pchlan(&adapter->hw); 6921 6922 e1000e_power_up_phy(adapter); 6923 6924 /* report the system wakeup cause from S3/S4 */ 6925 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) { 6926 u16 phy_data; 6927 6928 e1e_rphy(&adapter->hw, BM_WUS, &phy_data); 6929 if (phy_data) { 6930 e_info("PHY Wakeup cause - %s\n", 6931 phy_data & E1000_WUS_EX ? "Unicast Packet" : 6932 phy_data & E1000_WUS_MC ? "Multicast Packet" : 6933 phy_data & E1000_WUS_BC ? "Broadcast Packet" : 6934 phy_data & E1000_WUS_MAG ? "Magic Packet" : 6935 phy_data & E1000_WUS_LNKC ? 6936 "Link Status Change" : "other"); 6937 } 6938 e1e_wphy(&adapter->hw, BM_WUS, ~0); 6939 } else { 6940 u32 wus = er32(WUS); 6941 6942 if (wus) { 6943 e_info("MAC Wakeup cause - %s\n", 6944 wus & E1000_WUS_EX ? "Unicast Packet" : 6945 wus & E1000_WUS_MC ? "Multicast Packet" : 6946 wus & E1000_WUS_BC ? "Broadcast Packet" : 6947 wus & E1000_WUS_MAG ? "Magic Packet" : 6948 wus & E1000_WUS_LNKC ? "Link Status Change" : 6949 "other"); 6950 } 6951 ew32(WUS, ~0); 6952 } 6953 6954 e1000e_reset(adapter); 6955 6956 e1000_init_manageability_pt(adapter); 6957 6958 /* If the controller has AMT, do not set DRV_LOAD until the interface 6959 * is up. For all other cases, let the f/w know that the h/w is now 6960 * under the control of the driver. 6961 */ 6962 if (!(adapter->flags & FLAG_HAS_AMT)) 6963 e1000e_get_hw_control(adapter); 6964 6965 return 0; 6966 } 6967 6968 static int e1000e_pm_prepare(struct device *dev) 6969 { 6970 return pm_runtime_suspended(dev) && 6971 pm_suspend_via_firmware(); 6972 } 6973 6974 static int e1000e_pm_suspend(struct device *dev) 6975 { 6976 struct net_device *netdev = pci_get_drvdata(to_pci_dev(dev)); 6977 struct e1000_adapter *adapter = netdev_priv(netdev); 6978 struct pci_dev *pdev = to_pci_dev(dev); 6979 int rc; 6980 6981 e1000e_flush_lpic(pdev); 6982 6983 e1000e_pm_freeze(dev); 6984 6985 rc = __e1000_shutdown(pdev, false); 6986 if (!rc) { 6987 /* Introduce S0ix implementation */ 6988 if (adapter->flags2 & FLAG2_ENABLE_S0IX_FLOWS) 6989 e1000e_s0ix_entry_flow(adapter); 6990 } 6991 6992 return 0; 6993 } 6994 6995 static int e1000e_pm_resume(struct device *dev) 6996 { 6997 struct net_device *netdev = pci_get_drvdata(to_pci_dev(dev)); 6998 struct e1000_adapter *adapter = netdev_priv(netdev); 6999 struct pci_dev *pdev = to_pci_dev(dev); 7000 int rc; 7001 7002 /* Introduce S0ix implementation */ 7003 if (adapter->flags2 & FLAG2_ENABLE_S0IX_FLOWS) 7004 e1000e_s0ix_exit_flow(adapter); 7005 7006 rc = __e1000_resume(pdev); 7007 if (rc) 7008 return rc; 7009 7010 return e1000e_pm_thaw(dev); 7011 } 7012 7013 static __maybe_unused int e1000e_pm_runtime_idle(struct device *dev) 7014 { 7015 struct net_device *netdev = dev_get_drvdata(dev); 7016 struct e1000_adapter *adapter = netdev_priv(netdev); 7017 u16 eee_lp; 7018 7019 eee_lp = adapter->hw.dev_spec.ich8lan.eee_lp_ability; 7020 7021 if (!e1000e_has_link(adapter)) { 7022 adapter->hw.dev_spec.ich8lan.eee_lp_ability = eee_lp; 7023 pm_schedule_suspend(dev, 5 * MSEC_PER_SEC); 7024 } 7025 7026 return -EBUSY; 7027 } 7028 7029 static int e1000e_pm_runtime_resume(struct device *dev) 7030 { 7031 struct pci_dev *pdev = to_pci_dev(dev); 7032 struct net_device *netdev = pci_get_drvdata(pdev); 7033 struct e1000_adapter *adapter = netdev_priv(netdev); 7034 int rc; 7035 7036 pdev->pme_poll = true; 7037 7038 rc = __e1000_resume(pdev); 7039 if (rc) 7040 return rc; 7041 7042 if (netdev->flags & IFF_UP) 7043 e1000e_up(adapter); 7044 7045 return rc; 7046 } 7047 7048 static int e1000e_pm_runtime_suspend(struct device *dev) 7049 { 7050 struct pci_dev *pdev = to_pci_dev(dev); 7051 struct net_device *netdev = pci_get_drvdata(pdev); 7052 struct e1000_adapter *adapter = netdev_priv(netdev); 7053 7054 if (netdev->flags & IFF_UP) { 7055 int count = E1000_CHECK_RESET_COUNT; 7056 7057 while (test_bit(__E1000_RESETTING, &adapter->state) && count--) 7058 usleep_range(10000, 11000); 7059 7060 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state)); 7061 7062 /* Down the device without resetting the hardware */ 7063 e1000e_down(adapter, false); 7064 } 7065 7066 if (__e1000_shutdown(pdev, true)) { 7067 e1000e_pm_runtime_resume(dev); 7068 return -EBUSY; 7069 } 7070 7071 return 0; 7072 } 7073 7074 static void e1000_shutdown(struct pci_dev *pdev) 7075 { 7076 e1000e_flush_lpic(pdev); 7077 7078 e1000e_pm_freeze(&pdev->dev); 7079 7080 __e1000_shutdown(pdev, false); 7081 } 7082 7083 #ifdef CONFIG_NET_POLL_CONTROLLER 7084 7085 static irqreturn_t e1000_intr_msix(int __always_unused irq, void *data) 7086 { 7087 struct net_device *netdev = data; 7088 struct e1000_adapter *adapter = netdev_priv(netdev); 7089 7090 if (adapter->msix_entries) { 7091 int vector, msix_irq; 7092 7093 vector = 0; 7094 msix_irq = adapter->msix_entries[vector].vector; 7095 if (disable_hardirq(msix_irq)) 7096 e1000_intr_msix_rx(msix_irq, netdev); 7097 enable_irq(msix_irq); 7098 7099 vector++; 7100 msix_irq = adapter->msix_entries[vector].vector; 7101 if (disable_hardirq(msix_irq)) 7102 e1000_intr_msix_tx(msix_irq, netdev); 7103 enable_irq(msix_irq); 7104 7105 vector++; 7106 msix_irq = adapter->msix_entries[vector].vector; 7107 if (disable_hardirq(msix_irq)) 7108 e1000_msix_other(msix_irq, netdev); 7109 enable_irq(msix_irq); 7110 } 7111 7112 return IRQ_HANDLED; 7113 } 7114 7115 /** 7116 * e1000_netpoll 7117 * @netdev: network interface device structure 7118 * 7119 * Polling 'interrupt' - used by things like netconsole to send skbs 7120 * without having to re-enable interrupts. It's not called while 7121 * the interrupt routine is executing. 7122 */ 7123 static void e1000_netpoll(struct net_device *netdev) 7124 { 7125 struct e1000_adapter *adapter = netdev_priv(netdev); 7126 7127 switch (adapter->int_mode) { 7128 case E1000E_INT_MODE_MSIX: 7129 e1000_intr_msix(adapter->pdev->irq, netdev); 7130 break; 7131 case E1000E_INT_MODE_MSI: 7132 if (disable_hardirq(adapter->pdev->irq)) 7133 e1000_intr_msi(adapter->pdev->irq, netdev); 7134 enable_irq(adapter->pdev->irq); 7135 break; 7136 default: /* E1000E_INT_MODE_LEGACY */ 7137 if (disable_hardirq(adapter->pdev->irq)) 7138 e1000_intr(adapter->pdev->irq, netdev); 7139 enable_irq(adapter->pdev->irq); 7140 break; 7141 } 7142 } 7143 #endif 7144 7145 /** 7146 * e1000_io_error_detected - called when PCI error is detected 7147 * @pdev: Pointer to PCI device 7148 * @state: The current pci connection state 7149 * 7150 * This function is called after a PCI bus error affecting 7151 * this device has been detected. 7152 */ 7153 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, 7154 pci_channel_state_t state) 7155 { 7156 e1000e_pm_freeze(&pdev->dev); 7157 7158 if (state == pci_channel_io_perm_failure) 7159 return PCI_ERS_RESULT_DISCONNECT; 7160 7161 pci_disable_device(pdev); 7162 7163 /* Request a slot reset. */ 7164 return PCI_ERS_RESULT_NEED_RESET; 7165 } 7166 7167 /** 7168 * e1000_io_slot_reset - called after the pci bus has been reset. 7169 * @pdev: Pointer to PCI device 7170 * 7171 * Restart the card from scratch, as if from a cold-boot. Implementation 7172 * resembles the first-half of the e1000e_pm_resume routine. 7173 */ 7174 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev) 7175 { 7176 struct net_device *netdev = pci_get_drvdata(pdev); 7177 struct e1000_adapter *adapter = netdev_priv(netdev); 7178 struct e1000_hw *hw = &adapter->hw; 7179 u16 aspm_disable_flag = 0; 7180 int err; 7181 pci_ers_result_t result; 7182 7183 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S) 7184 aspm_disable_flag = PCIE_LINK_STATE_L0S; 7185 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1) 7186 aspm_disable_flag |= PCIE_LINK_STATE_L1; 7187 if (aspm_disable_flag) 7188 e1000e_disable_aspm_locked(pdev, aspm_disable_flag); 7189 7190 err = pci_enable_device_mem(pdev); 7191 if (err) { 7192 dev_err(&pdev->dev, 7193 "Cannot re-enable PCI device after reset.\n"); 7194 result = PCI_ERS_RESULT_DISCONNECT; 7195 } else { 7196 pci_restore_state(pdev); 7197 pci_set_master(pdev); 7198 7199 pci_enable_wake(pdev, PCI_D3hot, 0); 7200 pci_enable_wake(pdev, PCI_D3cold, 0); 7201 7202 e1000e_reset(adapter); 7203 ew32(WUS, ~0); 7204 result = PCI_ERS_RESULT_RECOVERED; 7205 } 7206 7207 return result; 7208 } 7209 7210 /** 7211 * e1000_io_resume - called when traffic can start flowing again. 7212 * @pdev: Pointer to PCI device 7213 * 7214 * This callback is called when the error recovery driver tells us that 7215 * its OK to resume normal operation. Implementation resembles the 7216 * second-half of the e1000e_pm_resume routine. 7217 */ 7218 static void e1000_io_resume(struct pci_dev *pdev) 7219 { 7220 struct net_device *netdev = pci_get_drvdata(pdev); 7221 struct e1000_adapter *adapter = netdev_priv(netdev); 7222 7223 e1000_init_manageability_pt(adapter); 7224 7225 e1000e_pm_thaw(&pdev->dev); 7226 7227 /* If the controller has AMT, do not set DRV_LOAD until the interface 7228 * is up. For all other cases, let the f/w know that the h/w is now 7229 * under the control of the driver. 7230 */ 7231 if (!(adapter->flags & FLAG_HAS_AMT)) 7232 e1000e_get_hw_control(adapter); 7233 } 7234 7235 static void e1000_print_device_info(struct e1000_adapter *adapter) 7236 { 7237 struct e1000_hw *hw = &adapter->hw; 7238 struct net_device *netdev = adapter->netdev; 7239 u32 ret_val; 7240 u8 pba_str[E1000_PBANUM_LENGTH]; 7241 7242 /* print bus type/speed/width info */ 7243 e_info("(PCI Express:2.5GT/s:%s) %pM\n", 7244 /* bus width */ 7245 ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" : 7246 "Width x1"), 7247 /* MAC address */ 7248 netdev->dev_addr); 7249 e_info("Intel(R) PRO/%s Network Connection\n", 7250 (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000"); 7251 ret_val = e1000_read_pba_string_generic(hw, pba_str, 7252 E1000_PBANUM_LENGTH); 7253 if (ret_val) 7254 strscpy((char *)pba_str, "Unknown", sizeof(pba_str)); 7255 e_info("MAC: %d, PHY: %d, PBA No: %s\n", 7256 hw->mac.type, hw->phy.type, pba_str); 7257 } 7258 7259 static void e1000_eeprom_checks(struct e1000_adapter *adapter) 7260 { 7261 struct e1000_hw *hw = &adapter->hw; 7262 int ret_val; 7263 u16 buf = 0; 7264 7265 if (hw->mac.type != e1000_82573) 7266 return; 7267 7268 ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf); 7269 le16_to_cpus(&buf); 7270 if (!ret_val && (!(buf & BIT(0)))) { 7271 /* Deep Smart Power Down (DSPD) */ 7272 dev_warn(&adapter->pdev->dev, 7273 "Warning: detected DSPD enabled in EEPROM\n"); 7274 } 7275 } 7276 7277 static netdev_features_t e1000_fix_features(struct net_device *netdev, 7278 netdev_features_t features) 7279 { 7280 struct e1000_adapter *adapter = netdev_priv(netdev); 7281 struct e1000_hw *hw = &adapter->hw; 7282 7283 /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */ 7284 if ((hw->mac.type >= e1000_pch2lan) && (netdev->mtu > ETH_DATA_LEN)) 7285 features &= ~NETIF_F_RXFCS; 7286 7287 /* Since there is no support for separate Rx/Tx vlan accel 7288 * enable/disable make sure Tx flag is always in same state as Rx. 7289 */ 7290 if (features & NETIF_F_HW_VLAN_CTAG_RX) 7291 features |= NETIF_F_HW_VLAN_CTAG_TX; 7292 else 7293 features &= ~NETIF_F_HW_VLAN_CTAG_TX; 7294 7295 return features; 7296 } 7297 7298 static int e1000_set_features(struct net_device *netdev, 7299 netdev_features_t features) 7300 { 7301 struct e1000_adapter *adapter = netdev_priv(netdev); 7302 netdev_features_t changed = features ^ netdev->features; 7303 7304 if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) 7305 adapter->flags |= FLAG_TSO_FORCE; 7306 7307 if (!(changed & (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX | 7308 NETIF_F_RXCSUM | NETIF_F_RXHASH | NETIF_F_RXFCS | 7309 NETIF_F_RXALL))) 7310 return 0; 7311 7312 if (changed & NETIF_F_RXFCS) { 7313 if (features & NETIF_F_RXFCS) { 7314 adapter->flags2 &= ~FLAG2_CRC_STRIPPING; 7315 } else { 7316 /* We need to take it back to defaults, which might mean 7317 * stripping is still disabled at the adapter level. 7318 */ 7319 if (adapter->flags2 & FLAG2_DFLT_CRC_STRIPPING) 7320 adapter->flags2 |= FLAG2_CRC_STRIPPING; 7321 else 7322 adapter->flags2 &= ~FLAG2_CRC_STRIPPING; 7323 } 7324 } 7325 7326 netdev->features = features; 7327 7328 if (netif_running(netdev)) 7329 e1000e_reinit_locked(adapter); 7330 else 7331 e1000e_reset(adapter); 7332 7333 return 1; 7334 } 7335 7336 static const struct net_device_ops e1000e_netdev_ops = { 7337 .ndo_open = e1000e_open, 7338 .ndo_stop = e1000e_close, 7339 .ndo_start_xmit = e1000_xmit_frame, 7340 .ndo_get_stats64 = e1000e_get_stats64, 7341 .ndo_set_rx_mode = e1000e_set_rx_mode, 7342 .ndo_set_mac_address = e1000_set_mac, 7343 .ndo_change_mtu = e1000_change_mtu, 7344 .ndo_eth_ioctl = e1000_ioctl, 7345 .ndo_tx_timeout = e1000_tx_timeout, 7346 .ndo_validate_addr = eth_validate_addr, 7347 7348 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid, 7349 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid, 7350 #ifdef CONFIG_NET_POLL_CONTROLLER 7351 .ndo_poll_controller = e1000_netpoll, 7352 #endif 7353 .ndo_set_features = e1000_set_features, 7354 .ndo_fix_features = e1000_fix_features, 7355 .ndo_features_check = passthru_features_check, 7356 .ndo_hwtstamp_get = e1000e_hwtstamp_get, 7357 .ndo_hwtstamp_set = e1000e_hwtstamp_set, 7358 }; 7359 7360 /** 7361 * e1000_probe - Device Initialization Routine 7362 * @pdev: PCI device information struct 7363 * @ent: entry in e1000_pci_tbl 7364 * 7365 * Returns 0 on success, negative on failure 7366 * 7367 * e1000_probe initializes an adapter identified by a pci_dev structure. 7368 * The OS initialization, configuring of the adapter private structure, 7369 * and a hardware reset occur. 7370 **/ 7371 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 7372 { 7373 struct net_device *netdev; 7374 struct e1000_adapter *adapter; 7375 struct e1000_hw *hw; 7376 const struct e1000_info *ei = e1000_info_tbl[ent->driver_data]; 7377 resource_size_t mmio_start, mmio_len; 7378 resource_size_t flash_start, flash_len; 7379 static int cards_found; 7380 u16 aspm_disable_flag = 0; 7381 u16 eeprom_data = 0; 7382 u16 eeprom_apme_mask = E1000_EEPROM_APME; 7383 int bars, i, err; 7384 s32 ret_val = 0; 7385 7386 if (ei->flags2 & FLAG2_DISABLE_ASPM_L0S) 7387 aspm_disable_flag = PCIE_LINK_STATE_L0S; 7388 if (ei->flags2 & FLAG2_DISABLE_ASPM_L1) 7389 aspm_disable_flag |= PCIE_LINK_STATE_L1; 7390 if (aspm_disable_flag) 7391 e1000e_disable_aspm(pdev, aspm_disable_flag); 7392 7393 err = pci_enable_device_mem(pdev); 7394 if (err) 7395 return err; 7396 7397 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 7398 if (err) { 7399 dev_err(&pdev->dev, 7400 "No usable DMA configuration, aborting\n"); 7401 goto err_dma; 7402 } 7403 7404 bars = pci_select_bars(pdev, IORESOURCE_MEM); 7405 err = pci_request_selected_regions_exclusive(pdev, bars, 7406 e1000e_driver_name); 7407 if (err) 7408 goto err_pci_reg; 7409 7410 pci_set_master(pdev); 7411 /* PCI config space info */ 7412 err = pci_save_state(pdev); 7413 if (err) 7414 goto err_alloc_etherdev; 7415 7416 err = -ENOMEM; 7417 netdev = alloc_etherdev(sizeof(struct e1000_adapter)); 7418 if (!netdev) 7419 goto err_alloc_etherdev; 7420 7421 SET_NETDEV_DEV(netdev, &pdev->dev); 7422 7423 netdev->irq = pdev->irq; 7424 7425 pci_set_drvdata(pdev, netdev); 7426 adapter = netdev_priv(netdev); 7427 hw = &adapter->hw; 7428 adapter->netdev = netdev; 7429 adapter->pdev = pdev; 7430 adapter->ei = ei; 7431 adapter->pba = ei->pba; 7432 adapter->flags = ei->flags; 7433 adapter->flags2 = ei->flags2; 7434 adapter->hw.adapter = adapter; 7435 adapter->hw.mac.type = ei->mac; 7436 adapter->max_hw_frame_size = ei->max_hw_frame_size; 7437 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); 7438 7439 mmio_start = pci_resource_start(pdev, 0); 7440 mmio_len = pci_resource_len(pdev, 0); 7441 7442 err = -EIO; 7443 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len); 7444 if (!adapter->hw.hw_addr) 7445 goto err_ioremap; 7446 7447 if ((adapter->flags & FLAG_HAS_FLASH) && 7448 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM) && 7449 (hw->mac.type < e1000_pch_spt)) { 7450 flash_start = pci_resource_start(pdev, 1); 7451 flash_len = pci_resource_len(pdev, 1); 7452 adapter->hw.flash_address = ioremap(flash_start, flash_len); 7453 if (!adapter->hw.flash_address) 7454 goto err_flashmap; 7455 } 7456 7457 /* Set default EEE advertisement */ 7458 if (adapter->flags2 & FLAG2_HAS_EEE) 7459 adapter->eee_advert = MDIO_EEE_100TX | MDIO_EEE_1000T; 7460 7461 /* construct the net_device struct */ 7462 netdev->netdev_ops = &e1000e_netdev_ops; 7463 e1000e_set_ethtool_ops(netdev); 7464 netdev->watchdog_timeo = 5 * HZ; 7465 netif_napi_add(netdev, &adapter->napi, e1000e_poll); 7466 strscpy(netdev->name, pci_name(pdev), sizeof(netdev->name)); 7467 7468 netdev->mem_start = mmio_start; 7469 netdev->mem_end = mmio_start + mmio_len; 7470 7471 adapter->bd_number = cards_found++; 7472 7473 e1000e_check_options(adapter); 7474 7475 /* setup adapter struct */ 7476 err = e1000_sw_init(adapter); 7477 if (err) 7478 goto err_sw_init; 7479 7480 memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops)); 7481 memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops)); 7482 memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops)); 7483 7484 err = ei->get_variants(adapter); 7485 if (err) 7486 goto err_hw_init; 7487 7488 if ((adapter->flags & FLAG_IS_ICH) && 7489 (adapter->flags & FLAG_READ_ONLY_NVM) && 7490 (hw->mac.type < e1000_pch_spt)) 7491 e1000e_write_protect_nvm_ich8lan(&adapter->hw); 7492 7493 hw->mac.ops.get_bus_info(&adapter->hw); 7494 7495 adapter->hw.phy.autoneg_wait_to_complete = 0; 7496 7497 /* Copper options */ 7498 if (adapter->hw.phy.media_type == e1000_media_type_copper) { 7499 adapter->hw.phy.mdix = AUTO_ALL_MODES; 7500 adapter->hw.phy.disable_polarity_correction = 0; 7501 adapter->hw.phy.ms_type = e1000_ms_hw_default; 7502 } 7503 7504 if (hw->phy.ops.check_reset_block && hw->phy.ops.check_reset_block(hw)) 7505 dev_info(&pdev->dev, 7506 "PHY reset is blocked due to SOL/IDER session.\n"); 7507 7508 /* Set initial default active device features */ 7509 netdev->features = (NETIF_F_SG | 7510 NETIF_F_HW_VLAN_CTAG_RX | 7511 NETIF_F_HW_VLAN_CTAG_TX | 7512 NETIF_F_TSO | 7513 NETIF_F_TSO6 | 7514 NETIF_F_RXHASH | 7515 NETIF_F_RXCSUM | 7516 NETIF_F_HW_CSUM); 7517 7518 /* disable TSO for pcie and 10/100 speeds to avoid 7519 * some hardware issues and for i219 to fix transfer 7520 * speed being capped at 60% 7521 */ 7522 if (!(adapter->flags & FLAG_TSO_FORCE)) { 7523 switch (adapter->link_speed) { 7524 case SPEED_10: 7525 case SPEED_100: 7526 e_info("10/100 speed: disabling TSO\n"); 7527 netdev->features &= ~NETIF_F_TSO; 7528 netdev->features &= ~NETIF_F_TSO6; 7529 break; 7530 case SPEED_1000: 7531 netdev->features |= NETIF_F_TSO; 7532 netdev->features |= NETIF_F_TSO6; 7533 break; 7534 default: 7535 /* oops */ 7536 break; 7537 } 7538 if (hw->mac.type == e1000_pch_spt) { 7539 netdev->features &= ~NETIF_F_TSO; 7540 netdev->features &= ~NETIF_F_TSO6; 7541 } 7542 } 7543 7544 /* Set user-changeable features (subset of all device features) */ 7545 netdev->hw_features = netdev->features; 7546 netdev->hw_features |= NETIF_F_RXFCS; 7547 netdev->priv_flags |= IFF_SUPP_NOFCS; 7548 netdev->hw_features |= NETIF_F_RXALL; 7549 7550 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) 7551 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 7552 7553 netdev->vlan_features |= (NETIF_F_SG | 7554 NETIF_F_TSO | 7555 NETIF_F_TSO6 | 7556 NETIF_F_HW_CSUM); 7557 7558 netdev->priv_flags |= IFF_UNICAST_FLT; 7559 7560 netdev->features |= NETIF_F_HIGHDMA; 7561 netdev->vlan_features |= NETIF_F_HIGHDMA; 7562 7563 /* MTU range: 68 - max_hw_frame_size */ 7564 netdev->min_mtu = ETH_MIN_MTU; 7565 netdev->max_mtu = adapter->max_hw_frame_size - 7566 (VLAN_ETH_HLEN + ETH_FCS_LEN); 7567 7568 if (e1000e_enable_mng_pass_thru(&adapter->hw)) 7569 adapter->flags |= FLAG_MNG_PT_ENABLED; 7570 7571 /* before reading the NVM, reset the controller to 7572 * put the device in a known good starting state 7573 */ 7574 adapter->hw.mac.ops.reset_hw(&adapter->hw); 7575 7576 /* systems with ASPM and others may see the checksum fail on the first 7577 * attempt. Let's give it a few tries 7578 */ 7579 for (i = 0;; i++) { 7580 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0) 7581 break; 7582 if (i == 2) { 7583 dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n"); 7584 err = -EIO; 7585 goto err_eeprom; 7586 } 7587 } 7588 7589 e1000_eeprom_checks(adapter); 7590 7591 /* copy the MAC address */ 7592 if (e1000e_read_mac_addr(&adapter->hw)) 7593 dev_err(&pdev->dev, 7594 "NVM Read Error while reading MAC address\n"); 7595 7596 eth_hw_addr_set(netdev, adapter->hw.mac.addr); 7597 7598 if (!is_valid_ether_addr(netdev->dev_addr)) { 7599 dev_err(&pdev->dev, "Invalid MAC Address: %pM\n", 7600 netdev->dev_addr); 7601 err = -EIO; 7602 goto err_eeprom; 7603 } 7604 7605 timer_setup(&adapter->watchdog_timer, e1000_watchdog, 0); 7606 timer_setup(&adapter->phy_info_timer, e1000_update_phy_info, 0); 7607 7608 INIT_WORK(&adapter->reset_task, e1000_reset_task); 7609 INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task); 7610 INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround); 7611 INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task); 7612 INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang); 7613 7614 /* Initialize link parameters. User can change them with ethtool */ 7615 adapter->hw.mac.autoneg = 1; 7616 adapter->fc_autoneg = true; 7617 adapter->hw.fc.requested_mode = e1000_fc_default; 7618 adapter->hw.fc.current_mode = e1000_fc_default; 7619 adapter->hw.phy.autoneg_advertised = 0x2f; 7620 7621 /* Initial Wake on LAN setting - If APM wake is enabled in 7622 * the EEPROM, enable the ACPI Magic Packet filter 7623 */ 7624 if (adapter->flags & FLAG_APME_IN_WUC) { 7625 /* APME bit in EEPROM is mapped to WUC.APME */ 7626 eeprom_data = er32(WUC); 7627 eeprom_apme_mask = E1000_WUC_APME; 7628 if ((hw->mac.type > e1000_ich10lan) && 7629 (eeprom_data & E1000_WUC_PHY_WAKE)) 7630 adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP; 7631 } else if (adapter->flags & FLAG_APME_IN_CTRL3) { 7632 if (adapter->flags & FLAG_APME_CHECK_PORT_B && 7633 (adapter->hw.bus.func == 1)) 7634 ret_val = e1000_read_nvm(&adapter->hw, 7635 NVM_INIT_CONTROL3_PORT_B, 7636 1, &eeprom_data); 7637 else 7638 ret_val = e1000_read_nvm(&adapter->hw, 7639 NVM_INIT_CONTROL3_PORT_A, 7640 1, &eeprom_data); 7641 } 7642 7643 /* fetch WoL from EEPROM */ 7644 if (ret_val) 7645 e_dbg("NVM read error getting WoL initial values: %d\n", ret_val); 7646 else if (eeprom_data & eeprom_apme_mask) 7647 adapter->eeprom_wol |= E1000_WUFC_MAG; 7648 7649 /* now that we have the eeprom settings, apply the special cases 7650 * where the eeprom may be wrong or the board simply won't support 7651 * wake on lan on a particular port 7652 */ 7653 if (!(adapter->flags & FLAG_HAS_WOL)) 7654 adapter->eeprom_wol = 0; 7655 7656 /* initialize the wol settings based on the eeprom settings */ 7657 adapter->wol = adapter->eeprom_wol; 7658 7659 /* make sure adapter isn't asleep if manageability is enabled */ 7660 if (adapter->wol || (adapter->flags & FLAG_MNG_PT_ENABLED) || 7661 (hw->mac.ops.check_mng_mode(hw))) 7662 device_wakeup_enable(&pdev->dev); 7663 7664 /* save off EEPROM version number */ 7665 ret_val = e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers); 7666 7667 if (ret_val) { 7668 e_dbg("NVM read error getting EEPROM version: %d\n", ret_val); 7669 adapter->eeprom_vers = 0; 7670 } 7671 7672 /* init PTP hardware clock */ 7673 e1000e_ptp_init(adapter); 7674 7675 if (hw->mac.type >= e1000_pch_mtp) 7676 adapter->flags2 |= FLAG2_DISABLE_K1; 7677 7678 /* reset the hardware with the new settings */ 7679 e1000e_reset(adapter); 7680 7681 /* If the controller has AMT, do not set DRV_LOAD until the interface 7682 * is up. For all other cases, let the f/w know that the h/w is now 7683 * under the control of the driver. 7684 */ 7685 if (!(adapter->flags & FLAG_HAS_AMT)) 7686 e1000e_get_hw_control(adapter); 7687 7688 if (hw->mac.type >= e1000_pch_cnp) 7689 adapter->flags2 |= FLAG2_ENABLE_S0IX_FLOWS; 7690 7691 strscpy(netdev->name, "eth%d", sizeof(netdev->name)); 7692 err = register_netdev(netdev); 7693 if (err) 7694 goto err_register; 7695 7696 /* carrier off reporting is important to ethtool even BEFORE open */ 7697 netif_carrier_off(netdev); 7698 7699 e1000_print_device_info(adapter); 7700 7701 dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_SMART_PREPARE); 7702 7703 if (pci_dev_run_wake(pdev)) 7704 pm_runtime_put_noidle(&pdev->dev); 7705 7706 return 0; 7707 7708 err_register: 7709 if (!(adapter->flags & FLAG_HAS_AMT)) 7710 e1000e_release_hw_control(adapter); 7711 err_eeprom: 7712 if (hw->phy.ops.check_reset_block && !hw->phy.ops.check_reset_block(hw)) 7713 e1000_phy_hw_reset(&adapter->hw); 7714 err_hw_init: 7715 kfree(adapter->tx_ring); 7716 kfree(adapter->rx_ring); 7717 err_sw_init: 7718 if ((adapter->hw.flash_address) && (hw->mac.type < e1000_pch_spt)) 7719 iounmap(adapter->hw.flash_address); 7720 e1000e_reset_interrupt_capability(adapter); 7721 err_flashmap: 7722 iounmap(adapter->hw.hw_addr); 7723 err_ioremap: 7724 free_netdev(netdev); 7725 err_alloc_etherdev: 7726 pci_release_mem_regions(pdev); 7727 err_pci_reg: 7728 err_dma: 7729 pci_disable_device(pdev); 7730 return err; 7731 } 7732 7733 /** 7734 * e1000_remove - Device Removal Routine 7735 * @pdev: PCI device information struct 7736 * 7737 * e1000_remove is called by the PCI subsystem to alert the driver 7738 * that it should release a PCI device. This could be caused by a 7739 * Hot-Plug event, or because the driver is going to be removed from 7740 * memory. 7741 **/ 7742 static void e1000_remove(struct pci_dev *pdev) 7743 { 7744 struct net_device *netdev = pci_get_drvdata(pdev); 7745 struct e1000_adapter *adapter = netdev_priv(netdev); 7746 7747 e1000e_ptp_remove(adapter); 7748 7749 /* The timers may be rescheduled, so explicitly disable them 7750 * from being rescheduled. 7751 */ 7752 set_bit(__E1000_DOWN, &adapter->state); 7753 timer_delete_sync(&adapter->watchdog_timer); 7754 timer_delete_sync(&adapter->phy_info_timer); 7755 7756 cancel_work_sync(&adapter->reset_task); 7757 cancel_work_sync(&adapter->watchdog_task); 7758 cancel_work_sync(&adapter->downshift_task); 7759 cancel_work_sync(&adapter->update_phy_task); 7760 cancel_work_sync(&adapter->print_hang_task); 7761 7762 if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) { 7763 cancel_work_sync(&adapter->tx_hwtstamp_work); 7764 if (adapter->tx_hwtstamp_skb) { 7765 dev_consume_skb_any(adapter->tx_hwtstamp_skb); 7766 adapter->tx_hwtstamp_skb = NULL; 7767 } 7768 } 7769 7770 unregister_netdev(netdev); 7771 7772 if (pci_dev_run_wake(pdev)) 7773 pm_runtime_get_noresume(&pdev->dev); 7774 7775 /* Release control of h/w to f/w. If f/w is AMT enabled, this 7776 * would have already happened in close and is redundant. 7777 */ 7778 e1000e_release_hw_control(adapter); 7779 7780 e1000e_reset_interrupt_capability(adapter); 7781 kfree(adapter->tx_ring); 7782 kfree(adapter->rx_ring); 7783 7784 iounmap(adapter->hw.hw_addr); 7785 if ((adapter->hw.flash_address) && 7786 (adapter->hw.mac.type < e1000_pch_spt)) 7787 iounmap(adapter->hw.flash_address); 7788 pci_release_mem_regions(pdev); 7789 7790 free_netdev(netdev); 7791 7792 pci_disable_device(pdev); 7793 } 7794 7795 /* PCI Error Recovery (ERS) */ 7796 static const struct pci_error_handlers e1000_err_handler = { 7797 .error_detected = e1000_io_error_detected, 7798 .slot_reset = e1000_io_slot_reset, 7799 .resume = e1000_io_resume, 7800 }; 7801 7802 static const struct pci_device_id e1000_pci_tbl[] = { 7803 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 }, 7804 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 }, 7805 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 }, 7806 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), 7807 board_82571 }, 7808 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 }, 7809 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 }, 7810 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 }, 7811 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 }, 7812 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 }, 7813 7814 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 }, 7815 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 }, 7816 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 }, 7817 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 }, 7818 7819 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 }, 7820 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 }, 7821 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 }, 7822 7823 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 }, 7824 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 }, 7825 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 }, 7826 7827 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT), 7828 board_80003es2lan }, 7829 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT), 7830 board_80003es2lan }, 7831 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT), 7832 board_80003es2lan }, 7833 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT), 7834 board_80003es2lan }, 7835 7836 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan }, 7837 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan }, 7838 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan }, 7839 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan }, 7840 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan }, 7841 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan }, 7842 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan }, 7843 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan }, 7844 7845 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan }, 7846 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan }, 7847 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan }, 7848 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan }, 7849 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan }, 7850 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan }, 7851 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan }, 7852 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan }, 7853 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan }, 7854 7855 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan }, 7856 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan }, 7857 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan }, 7858 7859 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan }, 7860 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan }, 7861 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_V), board_ich10lan }, 7862 7863 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan }, 7864 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan }, 7865 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan }, 7866 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan }, 7867 7868 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_LM), board_pch2lan }, 7869 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_V), board_pch2lan }, 7870 7871 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_LM), board_pch_lpt }, 7872 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_V), board_pch_lpt }, 7873 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_LM), board_pch_lpt }, 7874 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_V), board_pch_lpt }, 7875 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_LM2), board_pch_lpt }, 7876 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_V2), board_pch_lpt }, 7877 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_LM3), board_pch_lpt }, 7878 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_V3), board_pch_lpt }, 7879 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM), board_pch_spt }, 7880 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V), board_pch_spt }, 7881 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM2), board_pch_spt }, 7882 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V2), board_pch_spt }, 7883 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LBG_I219_LM3), board_pch_spt }, 7884 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM4), board_pch_spt }, 7885 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V4), board_pch_spt }, 7886 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM5), board_pch_spt }, 7887 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V5), board_pch_spt }, 7888 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CNP_I219_LM6), board_pch_cnp }, 7889 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CNP_I219_V6), board_pch_cnp }, 7890 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CNP_I219_LM7), board_pch_cnp }, 7891 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CNP_I219_V7), board_pch_cnp }, 7892 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ICP_I219_LM8), board_pch_cnp }, 7893 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ICP_I219_V8), board_pch_cnp }, 7894 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ICP_I219_LM9), board_pch_cnp }, 7895 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ICP_I219_V9), board_pch_cnp }, 7896 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CMP_I219_LM10), board_pch_cnp }, 7897 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CMP_I219_V10), board_pch_cnp }, 7898 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CMP_I219_LM11), board_pch_cnp }, 7899 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CMP_I219_V11), board_pch_cnp }, 7900 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CMP_I219_LM12), board_pch_spt }, 7901 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CMP_I219_V12), board_pch_spt }, 7902 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_TGP_I219_LM13), board_pch_tgp }, 7903 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_TGP_I219_V13), board_pch_tgp }, 7904 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_TGP_I219_LM14), board_pch_tgp }, 7905 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_TGP_I219_V14), board_pch_tgp }, 7906 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_TGP_I219_LM15), board_pch_tgp }, 7907 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_TGP_I219_V15), board_pch_tgp }, 7908 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_RPL_I219_LM23), board_pch_adp }, 7909 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_RPL_I219_V23), board_pch_adp }, 7910 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ADP_I219_LM16), board_pch_adp }, 7911 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ADP_I219_V16), board_pch_adp }, 7912 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ADP_I219_LM17), board_pch_adp }, 7913 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ADP_I219_V17), board_pch_adp }, 7914 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_RPL_I219_LM22), board_pch_adp }, 7915 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_RPL_I219_V22), board_pch_adp }, 7916 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ADP_I219_LM19), board_pch_adp }, 7917 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ADP_I219_V19), board_pch_adp }, 7918 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_MTP_I219_LM18), board_pch_mtp }, 7919 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_MTP_I219_V18), board_pch_mtp }, 7920 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LNP_I219_LM20), board_pch_mtp }, 7921 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LNP_I219_V20), board_pch_mtp }, 7922 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LNP_I219_LM21), board_pch_mtp }, 7923 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LNP_I219_V21), board_pch_mtp }, 7924 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ARL_I219_LM24), board_pch_mtp }, 7925 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ARL_I219_V24), board_pch_mtp }, 7926 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_PTP_I219_LM25), board_pch_ptp }, 7927 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_PTP_I219_V25), board_pch_ptp }, 7928 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_PTP_I219_LM27), board_pch_ptp }, 7929 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_PTP_I219_V27), board_pch_ptp }, 7930 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_NVL_I219_LM29), board_pch_ptp }, 7931 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_NVL_I219_V29), board_pch_ptp }, 7932 7933 { 0, 0, 0, 0, 0, 0, 0 } /* terminate list */ 7934 }; 7935 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl); 7936 7937 static const struct dev_pm_ops e1000e_pm_ops = { 7938 .prepare = e1000e_pm_prepare, 7939 .suspend = e1000e_pm_suspend, 7940 .resume = e1000e_pm_resume, 7941 .freeze = e1000e_pm_freeze, 7942 .thaw = e1000e_pm_thaw, 7943 .poweroff = e1000e_pm_suspend, 7944 .restore = e1000e_pm_resume, 7945 RUNTIME_PM_OPS(e1000e_pm_runtime_suspend, e1000e_pm_runtime_resume, 7946 e1000e_pm_runtime_idle) 7947 }; 7948 7949 /* PCI Device API Driver */ 7950 static struct pci_driver e1000_driver = { 7951 .name = e1000e_driver_name, 7952 .id_table = e1000_pci_tbl, 7953 .probe = e1000_probe, 7954 .remove = e1000_remove, 7955 .driver.pm = pm_ptr(&e1000e_pm_ops), 7956 .shutdown = e1000_shutdown, 7957 .err_handler = &e1000_err_handler 7958 }; 7959 7960 /** 7961 * e1000_init_module - Driver Registration Routine 7962 * 7963 * e1000_init_module is the first routine called when the driver is 7964 * loaded. All it does is register with the PCI subsystem. 7965 **/ 7966 static int __init e1000_init_module(void) 7967 { 7968 pr_info("Intel(R) PRO/1000 Network Driver\n"); 7969 pr_info("Copyright(c) 1999 - 2015 Intel Corporation.\n"); 7970 7971 return pci_register_driver(&e1000_driver); 7972 } 7973 module_init(e1000_init_module); 7974 7975 /** 7976 * e1000_exit_module - Driver Exit Cleanup Routine 7977 * 7978 * e1000_exit_module is called just before the driver is removed 7979 * from memory. 7980 **/ 7981 static void __exit e1000_exit_module(void) 7982 { 7983 pci_unregister_driver(&e1000_driver); 7984 } 7985 module_exit(e1000_exit_module); 7986 7987 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver"); 7988 MODULE_LICENSE("GPL v2"); 7989 7990 /* netdev.c */ 7991