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/aer.h> 27 #include <linux/prefetch.h> 28 29 #include "e1000.h" 30 31 char e1000e_driver_name[] = "e1000e"; 32 33 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) 34 static int debug = -1; 35 module_param(debug, int, 0); 36 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 37 38 static const struct e1000_info *e1000_info_tbl[] = { 39 [board_82571] = &e1000_82571_info, 40 [board_82572] = &e1000_82572_info, 41 [board_82573] = &e1000_82573_info, 42 [board_82574] = &e1000_82574_info, 43 [board_82583] = &e1000_82583_info, 44 [board_80003es2lan] = &e1000_es2_info, 45 [board_ich8lan] = &e1000_ich8_info, 46 [board_ich9lan] = &e1000_ich9_info, 47 [board_ich10lan] = &e1000_ich10_info, 48 [board_pchlan] = &e1000_pch_info, 49 [board_pch2lan] = &e1000_pch2_info, 50 [board_pch_lpt] = &e1000_pch_lpt_info, 51 [board_pch_spt] = &e1000_pch_spt_info, 52 [board_pch_cnp] = &e1000_pch_cnp_info, 53 }; 54 55 struct e1000_reg_info { 56 u32 ofs; 57 char *name; 58 }; 59 60 static const struct e1000_reg_info e1000_reg_info_tbl[] = { 61 /* General Registers */ 62 {E1000_CTRL, "CTRL"}, 63 {E1000_STATUS, "STATUS"}, 64 {E1000_CTRL_EXT, "CTRL_EXT"}, 65 66 /* Interrupt Registers */ 67 {E1000_ICR, "ICR"}, 68 69 /* Rx Registers */ 70 {E1000_RCTL, "RCTL"}, 71 {E1000_RDLEN(0), "RDLEN"}, 72 {E1000_RDH(0), "RDH"}, 73 {E1000_RDT(0), "RDT"}, 74 {E1000_RDTR, "RDTR"}, 75 {E1000_RXDCTL(0), "RXDCTL"}, 76 {E1000_ERT, "ERT"}, 77 {E1000_RDBAL(0), "RDBAL"}, 78 {E1000_RDBAH(0), "RDBAH"}, 79 {E1000_RDFH, "RDFH"}, 80 {E1000_RDFT, "RDFT"}, 81 {E1000_RDFHS, "RDFHS"}, 82 {E1000_RDFTS, "RDFTS"}, 83 {E1000_RDFPC, "RDFPC"}, 84 85 /* Tx Registers */ 86 {E1000_TCTL, "TCTL"}, 87 {E1000_TDBAL(0), "TDBAL"}, 88 {E1000_TDBAH(0), "TDBAH"}, 89 {E1000_TDLEN(0), "TDLEN"}, 90 {E1000_TDH(0), "TDH"}, 91 {E1000_TDT(0), "TDT"}, 92 {E1000_TIDV, "TIDV"}, 93 {E1000_TXDCTL(0), "TXDCTL"}, 94 {E1000_TADV, "TADV"}, 95 {E1000_TARC(0), "TARC"}, 96 {E1000_TDFH, "TDFH"}, 97 {E1000_TDFT, "TDFT"}, 98 {E1000_TDFHS, "TDFHS"}, 99 {E1000_TDFTS, "TDFTS"}, 100 {E1000_TDFPC, "TDFPC"}, 101 102 /* List Terminator */ 103 {0, NULL} 104 }; 105 106 /** 107 * __ew32_prepare - prepare to write to MAC CSR register on certain parts 108 * @hw: pointer to the HW structure 109 * 110 * When updating the MAC CSR registers, the Manageability Engine (ME) could 111 * be accessing the registers at the same time. Normally, this is handled in 112 * h/w by an arbiter but on some parts there is a bug that acknowledges Host 113 * accesses later than it should which could result in the register to have 114 * an incorrect value. Workaround this by checking the FWSM register which 115 * has bit 24 set while ME is accessing MAC CSR registers, wait if it is set 116 * and try again a number of times. 117 **/ 118 static void __ew32_prepare(struct e1000_hw *hw) 119 { 120 s32 i = E1000_ICH_FWSM_PCIM2PCI_COUNT; 121 122 while ((er32(FWSM) & E1000_ICH_FWSM_PCIM2PCI) && --i) 123 udelay(50); 124 } 125 126 void __ew32(struct e1000_hw *hw, unsigned long reg, u32 val) 127 { 128 if (hw->adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 129 __ew32_prepare(hw); 130 131 writel(val, hw->hw_addr + reg); 132 } 133 134 /** 135 * e1000_regdump - register printout routine 136 * @hw: pointer to the HW structure 137 * @reginfo: pointer to the register info table 138 **/ 139 static void e1000_regdump(struct e1000_hw *hw, struct e1000_reg_info *reginfo) 140 { 141 int n = 0; 142 char rname[16]; 143 u32 regs[8]; 144 145 switch (reginfo->ofs) { 146 case E1000_RXDCTL(0): 147 for (n = 0; n < 2; n++) 148 regs[n] = __er32(hw, E1000_RXDCTL(n)); 149 break; 150 case E1000_TXDCTL(0): 151 for (n = 0; n < 2; n++) 152 regs[n] = __er32(hw, E1000_TXDCTL(n)); 153 break; 154 case E1000_TARC(0): 155 for (n = 0; n < 2; n++) 156 regs[n] = __er32(hw, E1000_TARC(n)); 157 break; 158 default: 159 pr_info("%-15s %08x\n", 160 reginfo->name, __er32(hw, reginfo->ofs)); 161 return; 162 } 163 164 snprintf(rname, 16, "%s%s", reginfo->name, "[0-1]"); 165 pr_info("%-15s %08x %08x\n", rname, regs[0], regs[1]); 166 } 167 168 static void e1000e_dump_ps_pages(struct e1000_adapter *adapter, 169 struct e1000_buffer *bi) 170 { 171 int i; 172 struct e1000_ps_page *ps_page; 173 174 for (i = 0; i < adapter->rx_ps_pages; i++) { 175 ps_page = &bi->ps_pages[i]; 176 177 if (ps_page->page) { 178 pr_info("packet dump for ps_page %d:\n", i); 179 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 180 16, 1, page_address(ps_page->page), 181 PAGE_SIZE, true); 182 } 183 } 184 } 185 186 /** 187 * e1000e_dump - Print registers, Tx-ring and Rx-ring 188 * @adapter: board private structure 189 **/ 190 static void e1000e_dump(struct e1000_adapter *adapter) 191 { 192 struct net_device *netdev = adapter->netdev; 193 struct e1000_hw *hw = &adapter->hw; 194 struct e1000_reg_info *reginfo; 195 struct e1000_ring *tx_ring = adapter->tx_ring; 196 struct e1000_tx_desc *tx_desc; 197 struct my_u0 { 198 __le64 a; 199 __le64 b; 200 } *u0; 201 struct e1000_buffer *buffer_info; 202 struct e1000_ring *rx_ring = adapter->rx_ring; 203 union e1000_rx_desc_packet_split *rx_desc_ps; 204 union e1000_rx_desc_extended *rx_desc; 205 struct my_u1 { 206 __le64 a; 207 __le64 b; 208 __le64 c; 209 __le64 d; 210 } *u1; 211 u32 staterr; 212 int i = 0; 213 214 if (!netif_msg_hw(adapter)) 215 return; 216 217 /* Print netdevice Info */ 218 if (netdev) { 219 dev_info(&adapter->pdev->dev, "Net device Info\n"); 220 pr_info("Device Name state trans_start\n"); 221 pr_info("%-15s %016lX %016lX\n", netdev->name, 222 netdev->state, dev_trans_start(netdev)); 223 } 224 225 /* Print Registers */ 226 dev_info(&adapter->pdev->dev, "Register Dump\n"); 227 pr_info(" Register Name Value\n"); 228 for (reginfo = (struct e1000_reg_info *)e1000_reg_info_tbl; 229 reginfo->name; reginfo++) { 230 e1000_regdump(hw, reginfo); 231 } 232 233 /* Print Tx Ring Summary */ 234 if (!netdev || !netif_running(netdev)) 235 return; 236 237 dev_info(&adapter->pdev->dev, "Tx Ring Summary\n"); 238 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n"); 239 buffer_info = &tx_ring->buffer_info[tx_ring->next_to_clean]; 240 pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n", 241 0, tx_ring->next_to_use, tx_ring->next_to_clean, 242 (unsigned long long)buffer_info->dma, 243 buffer_info->length, 244 buffer_info->next_to_watch, 245 (unsigned long long)buffer_info->time_stamp); 246 247 /* Print Tx Ring */ 248 if (!netif_msg_tx_done(adapter)) 249 goto rx_ring_summary; 250 251 dev_info(&adapter->pdev->dev, "Tx Ring Dump\n"); 252 253 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended) 254 * 255 * Legacy Transmit Descriptor 256 * +--------------------------------------------------------------+ 257 * 0 | Buffer Address [63:0] (Reserved on Write Back) | 258 * +--------------------------------------------------------------+ 259 * 8 | Special | CSS | Status | CMD | CSO | Length | 260 * +--------------------------------------------------------------+ 261 * 63 48 47 36 35 32 31 24 23 16 15 0 262 * 263 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload 264 * 63 48 47 40 39 32 31 16 15 8 7 0 265 * +----------------------------------------------------------------+ 266 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS | 267 * +----------------------------------------------------------------+ 268 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN | 269 * +----------------------------------------------------------------+ 270 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 271 * 272 * Extended Data Descriptor (DTYP=0x1) 273 * +----------------------------------------------------------------+ 274 * 0 | Buffer Address [63:0] | 275 * +----------------------------------------------------------------+ 276 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN | 277 * +----------------------------------------------------------------+ 278 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 279 */ 280 pr_info("Tl[desc] [address 63:0 ] [SpeCssSCmCsLen] [bi->dma ] leng ntw timestamp bi->skb <-- Legacy format\n"); 281 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Context format\n"); 282 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Data format\n"); 283 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) { 284 const char *next_desc; 285 tx_desc = E1000_TX_DESC(*tx_ring, i); 286 buffer_info = &tx_ring->buffer_info[i]; 287 u0 = (struct my_u0 *)tx_desc; 288 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean) 289 next_desc = " NTC/U"; 290 else if (i == tx_ring->next_to_use) 291 next_desc = " NTU"; 292 else if (i == tx_ring->next_to_clean) 293 next_desc = " NTC"; 294 else 295 next_desc = ""; 296 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p%s\n", 297 (!(le64_to_cpu(u0->b) & BIT(29)) ? 'l' : 298 ((le64_to_cpu(u0->b) & BIT(20)) ? 'd' : 'c')), 299 i, 300 (unsigned long long)le64_to_cpu(u0->a), 301 (unsigned long long)le64_to_cpu(u0->b), 302 (unsigned long long)buffer_info->dma, 303 buffer_info->length, buffer_info->next_to_watch, 304 (unsigned long long)buffer_info->time_stamp, 305 buffer_info->skb, next_desc); 306 307 if (netif_msg_pktdata(adapter) && buffer_info->skb) 308 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 309 16, 1, buffer_info->skb->data, 310 buffer_info->skb->len, true); 311 } 312 313 /* Print Rx Ring Summary */ 314 rx_ring_summary: 315 dev_info(&adapter->pdev->dev, "Rx Ring Summary\n"); 316 pr_info("Queue [NTU] [NTC]\n"); 317 pr_info(" %5d %5X %5X\n", 318 0, rx_ring->next_to_use, rx_ring->next_to_clean); 319 320 /* Print Rx Ring */ 321 if (!netif_msg_rx_status(adapter)) 322 return; 323 324 dev_info(&adapter->pdev->dev, "Rx Ring Dump\n"); 325 switch (adapter->rx_ps_pages) { 326 case 1: 327 case 2: 328 case 3: 329 /* [Extended] Packet Split Receive Descriptor Format 330 * 331 * +-----------------------------------------------------+ 332 * 0 | Buffer Address 0 [63:0] | 333 * +-----------------------------------------------------+ 334 * 8 | Buffer Address 1 [63:0] | 335 * +-----------------------------------------------------+ 336 * 16 | Buffer Address 2 [63:0] | 337 * +-----------------------------------------------------+ 338 * 24 | Buffer Address 3 [63:0] | 339 * +-----------------------------------------------------+ 340 */ 341 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"); 342 /* [Extended] Receive Descriptor (Write-Back) Format 343 * 344 * 63 48 47 32 31 13 12 8 7 4 3 0 345 * +------------------------------------------------------+ 346 * 0 | Packet | IP | Rsvd | MRQ | Rsvd | MRQ RSS | 347 * | Checksum | Ident | | Queue | | Type | 348 * +------------------------------------------------------+ 349 * 8 | VLAN Tag | Length | Extended Error | Extended Status | 350 * +------------------------------------------------------+ 351 * 63 48 47 32 31 20 19 0 352 */ 353 pr_info("RWB[desc] [ck ipid mrqhsh] [vl l0 ee es] [ l3 l2 l1 hs] [reserved ] ---------------- [bi->skb] <-- Ext Rx Write-Back format\n"); 354 for (i = 0; i < rx_ring->count; i++) { 355 const char *next_desc; 356 buffer_info = &rx_ring->buffer_info[i]; 357 rx_desc_ps = E1000_RX_DESC_PS(*rx_ring, i); 358 u1 = (struct my_u1 *)rx_desc_ps; 359 staterr = 360 le32_to_cpu(rx_desc_ps->wb.middle.status_error); 361 362 if (i == rx_ring->next_to_use) 363 next_desc = " NTU"; 364 else if (i == rx_ring->next_to_clean) 365 next_desc = " NTC"; 366 else 367 next_desc = ""; 368 369 if (staterr & E1000_RXD_STAT_DD) { 370 /* Descriptor Done */ 371 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX ---------------- %p%s\n", 372 "RWB", i, 373 (unsigned long long)le64_to_cpu(u1->a), 374 (unsigned long long)le64_to_cpu(u1->b), 375 (unsigned long long)le64_to_cpu(u1->c), 376 (unsigned long long)le64_to_cpu(u1->d), 377 buffer_info->skb, next_desc); 378 } else { 379 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX %016llX %p%s\n", 380 "R ", i, 381 (unsigned long long)le64_to_cpu(u1->a), 382 (unsigned long long)le64_to_cpu(u1->b), 383 (unsigned long long)le64_to_cpu(u1->c), 384 (unsigned long long)le64_to_cpu(u1->d), 385 (unsigned long long)buffer_info->dma, 386 buffer_info->skb, next_desc); 387 388 if (netif_msg_pktdata(adapter)) 389 e1000e_dump_ps_pages(adapter, 390 buffer_info); 391 } 392 } 393 break; 394 default: 395 case 0: 396 /* Extended Receive Descriptor (Read) Format 397 * 398 * +-----------------------------------------------------+ 399 * 0 | Buffer Address [63:0] | 400 * +-----------------------------------------------------+ 401 * 8 | Reserved | 402 * +-----------------------------------------------------+ 403 */ 404 pr_info("R [desc] [buf addr 63:0 ] [reserved 63:0 ] [bi->dma ] [bi->skb] <-- Ext (Read) format\n"); 405 /* Extended Receive Descriptor (Write-Back) Format 406 * 407 * 63 48 47 32 31 24 23 4 3 0 408 * +------------------------------------------------------+ 409 * | RSS Hash | | | | 410 * 0 +-------------------+ Rsvd | Reserved | MRQ RSS | 411 * | Packet | IP | | | Type | 412 * | Checksum | Ident | | | | 413 * +------------------------------------------------------+ 414 * 8 | VLAN Tag | Length | Extended Error | Extended Status | 415 * +------------------------------------------------------+ 416 * 63 48 47 32 31 20 19 0 417 */ 418 pr_info("RWB[desc] [cs ipid mrq] [vt ln xe xs] [bi->skb] <-- Ext (Write-Back) format\n"); 419 420 for (i = 0; i < rx_ring->count; i++) { 421 const char *next_desc; 422 423 buffer_info = &rx_ring->buffer_info[i]; 424 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 425 u1 = (struct my_u1 *)rx_desc; 426 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 427 428 if (i == rx_ring->next_to_use) 429 next_desc = " NTU"; 430 else if (i == rx_ring->next_to_clean) 431 next_desc = " NTC"; 432 else 433 next_desc = ""; 434 435 if (staterr & E1000_RXD_STAT_DD) { 436 /* Descriptor Done */ 437 pr_info("%s[0x%03X] %016llX %016llX ---------------- %p%s\n", 438 "RWB", i, 439 (unsigned long long)le64_to_cpu(u1->a), 440 (unsigned long long)le64_to_cpu(u1->b), 441 buffer_info->skb, next_desc); 442 } else { 443 pr_info("%s[0x%03X] %016llX %016llX %016llX %p%s\n", 444 "R ", i, 445 (unsigned long long)le64_to_cpu(u1->a), 446 (unsigned long long)le64_to_cpu(u1->b), 447 (unsigned long long)buffer_info->dma, 448 buffer_info->skb, next_desc); 449 450 if (netif_msg_pktdata(adapter) && 451 buffer_info->skb) 452 print_hex_dump(KERN_INFO, "", 453 DUMP_PREFIX_ADDRESS, 16, 454 1, 455 buffer_info->skb->data, 456 adapter->rx_buffer_len, 457 true); 458 } 459 } 460 } 461 } 462 463 /** 464 * e1000_desc_unused - calculate if we have unused descriptors 465 * @ring: pointer to ring struct to perform calculation on 466 **/ 467 static int e1000_desc_unused(struct e1000_ring *ring) 468 { 469 if (ring->next_to_clean > ring->next_to_use) 470 return ring->next_to_clean - ring->next_to_use - 1; 471 472 return ring->count + ring->next_to_clean - ring->next_to_use - 1; 473 } 474 475 /** 476 * e1000e_systim_to_hwtstamp - convert system time value to hw time stamp 477 * @adapter: board private structure 478 * @hwtstamps: time stamp structure to update 479 * @systim: unsigned 64bit system time value. 480 * 481 * Convert the system time value stored in the RX/TXSTMP registers into a 482 * hwtstamp which can be used by the upper level time stamping functions. 483 * 484 * The 'systim_lock' spinlock is used to protect the consistency of the 485 * system time value. This is needed because reading the 64 bit time 486 * value involves reading two 32 bit registers. The first read latches the 487 * value. 488 **/ 489 static void e1000e_systim_to_hwtstamp(struct e1000_adapter *adapter, 490 struct skb_shared_hwtstamps *hwtstamps, 491 u64 systim) 492 { 493 u64 ns; 494 unsigned long flags; 495 496 spin_lock_irqsave(&adapter->systim_lock, flags); 497 ns = timecounter_cyc2time(&adapter->tc, systim); 498 spin_unlock_irqrestore(&adapter->systim_lock, flags); 499 500 memset(hwtstamps, 0, sizeof(*hwtstamps)); 501 hwtstamps->hwtstamp = ns_to_ktime(ns); 502 } 503 504 /** 505 * e1000e_rx_hwtstamp - utility function which checks for Rx time stamp 506 * @adapter: board private structure 507 * @status: descriptor extended error and status field 508 * @skb: particular skb to include time stamp 509 * 510 * If the time stamp is valid, convert it into the timecounter ns value 511 * and store that result into the shhwtstamps structure which is passed 512 * up the network stack. 513 **/ 514 static void e1000e_rx_hwtstamp(struct e1000_adapter *adapter, u32 status, 515 struct sk_buff *skb) 516 { 517 struct e1000_hw *hw = &adapter->hw; 518 u64 rxstmp; 519 520 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP) || 521 !(status & E1000_RXDEXT_STATERR_TST) || 522 !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID)) 523 return; 524 525 /* The Rx time stamp registers contain the time stamp. No other 526 * received packet will be time stamped until the Rx time stamp 527 * registers are read. Because only one packet can be time stamped 528 * at a time, the register values must belong to this packet and 529 * therefore none of the other additional attributes need to be 530 * compared. 531 */ 532 rxstmp = (u64)er32(RXSTMPL); 533 rxstmp |= (u64)er32(RXSTMPH) << 32; 534 e1000e_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), rxstmp); 535 536 adapter->flags2 &= ~FLAG2_CHECK_RX_HWTSTAMP; 537 } 538 539 /** 540 * e1000_receive_skb - helper function to handle Rx indications 541 * @adapter: board private structure 542 * @netdev: pointer to netdev struct 543 * @staterr: descriptor extended error and status field as written by hardware 544 * @vlan: descriptor vlan field as written by hardware (no le/be conversion) 545 * @skb: pointer to sk_buff to be indicated to stack 546 **/ 547 static void e1000_receive_skb(struct e1000_adapter *adapter, 548 struct net_device *netdev, struct sk_buff *skb, 549 u32 staterr, __le16 vlan) 550 { 551 u16 tag = le16_to_cpu(vlan); 552 553 e1000e_rx_hwtstamp(adapter, staterr, skb); 554 555 skb->protocol = eth_type_trans(skb, netdev); 556 557 if (staterr & E1000_RXD_STAT_VP) 558 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag); 559 560 napi_gro_receive(&adapter->napi, skb); 561 } 562 563 /** 564 * e1000_rx_checksum - Receive Checksum Offload 565 * @adapter: board private structure 566 * @status_err: receive descriptor status and error fields 567 * @skb: socket buffer with received data 568 **/ 569 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err, 570 struct sk_buff *skb) 571 { 572 u16 status = (u16)status_err; 573 u8 errors = (u8)(status_err >> 24); 574 575 skb_checksum_none_assert(skb); 576 577 /* Rx checksum disabled */ 578 if (!(adapter->netdev->features & NETIF_F_RXCSUM)) 579 return; 580 581 /* Ignore Checksum bit is set */ 582 if (status & E1000_RXD_STAT_IXSM) 583 return; 584 585 /* TCP/UDP checksum error bit or IP checksum error bit is set */ 586 if (errors & (E1000_RXD_ERR_TCPE | E1000_RXD_ERR_IPE)) { 587 /* let the stack verify checksum errors */ 588 adapter->hw_csum_err++; 589 return; 590 } 591 592 /* TCP/UDP Checksum has not been calculated */ 593 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))) 594 return; 595 596 /* It must be a TCP or UDP packet with a valid checksum */ 597 skb->ip_summed = CHECKSUM_UNNECESSARY; 598 adapter->hw_csum_good++; 599 } 600 601 static void e1000e_update_rdt_wa(struct e1000_ring *rx_ring, unsigned int i) 602 { 603 struct e1000_adapter *adapter = rx_ring->adapter; 604 struct e1000_hw *hw = &adapter->hw; 605 606 __ew32_prepare(hw); 607 writel(i, rx_ring->tail); 608 609 if (unlikely(i != readl(rx_ring->tail))) { 610 u32 rctl = er32(RCTL); 611 612 ew32(RCTL, rctl & ~E1000_RCTL_EN); 613 e_err("ME firmware caused invalid RDT - resetting\n"); 614 schedule_work(&adapter->reset_task); 615 } 616 } 617 618 static void e1000e_update_tdt_wa(struct e1000_ring *tx_ring, unsigned int i) 619 { 620 struct e1000_adapter *adapter = tx_ring->adapter; 621 struct e1000_hw *hw = &adapter->hw; 622 623 __ew32_prepare(hw); 624 writel(i, tx_ring->tail); 625 626 if (unlikely(i != readl(tx_ring->tail))) { 627 u32 tctl = er32(TCTL); 628 629 ew32(TCTL, tctl & ~E1000_TCTL_EN); 630 e_err("ME firmware caused invalid TDT - resetting\n"); 631 schedule_work(&adapter->reset_task); 632 } 633 } 634 635 /** 636 * e1000_alloc_rx_buffers - Replace used receive buffers 637 * @rx_ring: Rx descriptor ring 638 * @cleaned_count: number to reallocate 639 * @gfp: flags for allocation 640 **/ 641 static void e1000_alloc_rx_buffers(struct e1000_ring *rx_ring, 642 int cleaned_count, gfp_t gfp) 643 { 644 struct e1000_adapter *adapter = rx_ring->adapter; 645 struct net_device *netdev = adapter->netdev; 646 struct pci_dev *pdev = adapter->pdev; 647 union e1000_rx_desc_extended *rx_desc; 648 struct e1000_buffer *buffer_info; 649 struct sk_buff *skb; 650 unsigned int i; 651 unsigned int bufsz = adapter->rx_buffer_len; 652 653 i = rx_ring->next_to_use; 654 buffer_info = &rx_ring->buffer_info[i]; 655 656 while (cleaned_count--) { 657 skb = buffer_info->skb; 658 if (skb) { 659 skb_trim(skb, 0); 660 goto map_skb; 661 } 662 663 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp); 664 if (!skb) { 665 /* Better luck next round */ 666 adapter->alloc_rx_buff_failed++; 667 break; 668 } 669 670 buffer_info->skb = skb; 671 map_skb: 672 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, 673 adapter->rx_buffer_len, 674 DMA_FROM_DEVICE); 675 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 676 dev_err(&pdev->dev, "Rx DMA map failed\n"); 677 adapter->rx_dma_failed++; 678 break; 679 } 680 681 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 682 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); 683 684 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) { 685 /* Force memory writes to complete before letting h/w 686 * know there are new descriptors to fetch. (Only 687 * applicable for weak-ordered memory model archs, 688 * such as IA-64). 689 */ 690 wmb(); 691 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 692 e1000e_update_rdt_wa(rx_ring, i); 693 else 694 writel(i, rx_ring->tail); 695 } 696 i++; 697 if (i == rx_ring->count) 698 i = 0; 699 buffer_info = &rx_ring->buffer_info[i]; 700 } 701 702 rx_ring->next_to_use = i; 703 } 704 705 /** 706 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split 707 * @rx_ring: Rx descriptor ring 708 * @cleaned_count: number to reallocate 709 * @gfp: flags for allocation 710 **/ 711 static void e1000_alloc_rx_buffers_ps(struct e1000_ring *rx_ring, 712 int cleaned_count, gfp_t gfp) 713 { 714 struct e1000_adapter *adapter = rx_ring->adapter; 715 struct net_device *netdev = adapter->netdev; 716 struct pci_dev *pdev = adapter->pdev; 717 union e1000_rx_desc_packet_split *rx_desc; 718 struct e1000_buffer *buffer_info; 719 struct e1000_ps_page *ps_page; 720 struct sk_buff *skb; 721 unsigned int i, j; 722 723 i = rx_ring->next_to_use; 724 buffer_info = &rx_ring->buffer_info[i]; 725 726 while (cleaned_count--) { 727 rx_desc = E1000_RX_DESC_PS(*rx_ring, i); 728 729 for (j = 0; j < PS_PAGE_BUFFERS; j++) { 730 ps_page = &buffer_info->ps_pages[j]; 731 if (j >= adapter->rx_ps_pages) { 732 /* all unused desc entries get hw null ptr */ 733 rx_desc->read.buffer_addr[j + 1] = 734 ~cpu_to_le64(0); 735 continue; 736 } 737 if (!ps_page->page) { 738 ps_page->page = alloc_page(gfp); 739 if (!ps_page->page) { 740 adapter->alloc_rx_buff_failed++; 741 goto no_buffers; 742 } 743 ps_page->dma = dma_map_page(&pdev->dev, 744 ps_page->page, 745 0, PAGE_SIZE, 746 DMA_FROM_DEVICE); 747 if (dma_mapping_error(&pdev->dev, 748 ps_page->dma)) { 749 dev_err(&adapter->pdev->dev, 750 "Rx DMA page map failed\n"); 751 adapter->rx_dma_failed++; 752 goto no_buffers; 753 } 754 } 755 /* Refresh the desc even if buffer_addrs 756 * didn't change because each write-back 757 * erases this info. 758 */ 759 rx_desc->read.buffer_addr[j + 1] = 760 cpu_to_le64(ps_page->dma); 761 } 762 763 skb = __netdev_alloc_skb_ip_align(netdev, adapter->rx_ps_bsize0, 764 gfp); 765 766 if (!skb) { 767 adapter->alloc_rx_buff_failed++; 768 break; 769 } 770 771 buffer_info->skb = skb; 772 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, 773 adapter->rx_ps_bsize0, 774 DMA_FROM_DEVICE); 775 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 776 dev_err(&pdev->dev, "Rx DMA map failed\n"); 777 adapter->rx_dma_failed++; 778 /* cleanup skb */ 779 dev_kfree_skb_any(skb); 780 buffer_info->skb = NULL; 781 break; 782 } 783 784 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma); 785 786 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) { 787 /* Force memory writes to complete before letting h/w 788 * know there are new descriptors to fetch. (Only 789 * applicable for weak-ordered memory model archs, 790 * such as IA-64). 791 */ 792 wmb(); 793 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 794 e1000e_update_rdt_wa(rx_ring, i << 1); 795 else 796 writel(i << 1, rx_ring->tail); 797 } 798 799 i++; 800 if (i == rx_ring->count) 801 i = 0; 802 buffer_info = &rx_ring->buffer_info[i]; 803 } 804 805 no_buffers: 806 rx_ring->next_to_use = i; 807 } 808 809 /** 810 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers 811 * @rx_ring: Rx descriptor ring 812 * @cleaned_count: number of buffers to allocate this pass 813 * @gfp: flags for allocation 814 **/ 815 816 static void e1000_alloc_jumbo_rx_buffers(struct e1000_ring *rx_ring, 817 int cleaned_count, gfp_t gfp) 818 { 819 struct e1000_adapter *adapter = rx_ring->adapter; 820 struct net_device *netdev = adapter->netdev; 821 struct pci_dev *pdev = adapter->pdev; 822 union e1000_rx_desc_extended *rx_desc; 823 struct e1000_buffer *buffer_info; 824 struct sk_buff *skb; 825 unsigned int i; 826 unsigned int bufsz = 256 - 16; /* for skb_reserve */ 827 828 i = rx_ring->next_to_use; 829 buffer_info = &rx_ring->buffer_info[i]; 830 831 while (cleaned_count--) { 832 skb = buffer_info->skb; 833 if (skb) { 834 skb_trim(skb, 0); 835 goto check_page; 836 } 837 838 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp); 839 if (unlikely(!skb)) { 840 /* Better luck next round */ 841 adapter->alloc_rx_buff_failed++; 842 break; 843 } 844 845 buffer_info->skb = skb; 846 check_page: 847 /* allocate a new page if necessary */ 848 if (!buffer_info->page) { 849 buffer_info->page = alloc_page(gfp); 850 if (unlikely(!buffer_info->page)) { 851 adapter->alloc_rx_buff_failed++; 852 break; 853 } 854 } 855 856 if (!buffer_info->dma) { 857 buffer_info->dma = dma_map_page(&pdev->dev, 858 buffer_info->page, 0, 859 PAGE_SIZE, 860 DMA_FROM_DEVICE); 861 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 862 adapter->alloc_rx_buff_failed++; 863 break; 864 } 865 } 866 867 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 868 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); 869 870 if (unlikely(++i == rx_ring->count)) 871 i = 0; 872 buffer_info = &rx_ring->buffer_info[i]; 873 } 874 875 if (likely(rx_ring->next_to_use != i)) { 876 rx_ring->next_to_use = i; 877 if (unlikely(i-- == 0)) 878 i = (rx_ring->count - 1); 879 880 /* Force memory writes to complete before letting h/w 881 * know there are new descriptors to fetch. (Only 882 * applicable for weak-ordered memory model archs, 883 * such as IA-64). 884 */ 885 wmb(); 886 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 887 e1000e_update_rdt_wa(rx_ring, i); 888 else 889 writel(i, rx_ring->tail); 890 } 891 } 892 893 static inline void e1000_rx_hash(struct net_device *netdev, __le32 rss, 894 struct sk_buff *skb) 895 { 896 if (netdev->features & NETIF_F_RXHASH) 897 skb_set_hash(skb, le32_to_cpu(rss), PKT_HASH_TYPE_L3); 898 } 899 900 /** 901 * e1000_clean_rx_irq - Send received data up the network stack 902 * @rx_ring: Rx descriptor ring 903 * @work_done: output parameter for indicating completed work 904 * @work_to_do: how many packets we can clean 905 * 906 * the return value indicates whether actual cleaning was done, there 907 * is no guarantee that everything was cleaned 908 **/ 909 static bool e1000_clean_rx_irq(struct e1000_ring *rx_ring, int *work_done, 910 int work_to_do) 911 { 912 struct e1000_adapter *adapter = rx_ring->adapter; 913 struct net_device *netdev = adapter->netdev; 914 struct pci_dev *pdev = adapter->pdev; 915 struct e1000_hw *hw = &adapter->hw; 916 union e1000_rx_desc_extended *rx_desc, *next_rxd; 917 struct e1000_buffer *buffer_info, *next_buffer; 918 u32 length, staterr; 919 unsigned int i; 920 int cleaned_count = 0; 921 bool cleaned = false; 922 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 923 924 i = rx_ring->next_to_clean; 925 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 926 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 927 buffer_info = &rx_ring->buffer_info[i]; 928 929 while (staterr & E1000_RXD_STAT_DD) { 930 struct sk_buff *skb; 931 932 if (*work_done >= work_to_do) 933 break; 934 (*work_done)++; 935 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */ 936 937 skb = buffer_info->skb; 938 buffer_info->skb = NULL; 939 940 prefetch(skb->data - NET_IP_ALIGN); 941 942 i++; 943 if (i == rx_ring->count) 944 i = 0; 945 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i); 946 prefetch(next_rxd); 947 948 next_buffer = &rx_ring->buffer_info[i]; 949 950 cleaned = true; 951 cleaned_count++; 952 dma_unmap_single(&pdev->dev, buffer_info->dma, 953 adapter->rx_buffer_len, DMA_FROM_DEVICE); 954 buffer_info->dma = 0; 955 956 length = le16_to_cpu(rx_desc->wb.upper.length); 957 958 /* !EOP means multiple descriptors were used to store a single 959 * packet, if that's the case we need to toss it. In fact, we 960 * need to toss every packet with the EOP bit clear and the 961 * next frame that _does_ have the EOP bit set, as it is by 962 * definition only a frame fragment 963 */ 964 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) 965 adapter->flags2 |= FLAG2_IS_DISCARDING; 966 967 if (adapter->flags2 & FLAG2_IS_DISCARDING) { 968 /* All receives must fit into a single buffer */ 969 e_dbg("Receive packet consumed multiple buffers\n"); 970 /* recycle */ 971 buffer_info->skb = skb; 972 if (staterr & E1000_RXD_STAT_EOP) 973 adapter->flags2 &= ~FLAG2_IS_DISCARDING; 974 goto next_desc; 975 } 976 977 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) && 978 !(netdev->features & NETIF_F_RXALL))) { 979 /* recycle */ 980 buffer_info->skb = skb; 981 goto next_desc; 982 } 983 984 /* adjust length to remove Ethernet CRC */ 985 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) { 986 /* If configured to store CRC, don't subtract FCS, 987 * but keep the FCS bytes out of the total_rx_bytes 988 * counter 989 */ 990 if (netdev->features & NETIF_F_RXFCS) 991 total_rx_bytes -= 4; 992 else 993 length -= 4; 994 } 995 996 total_rx_bytes += length; 997 total_rx_packets++; 998 999 /* code added for copybreak, this should improve 1000 * performance for small packets with large amounts 1001 * of reassembly being done in the stack 1002 */ 1003 if (length < copybreak) { 1004 struct sk_buff *new_skb = 1005 napi_alloc_skb(&adapter->napi, length); 1006 if (new_skb) { 1007 skb_copy_to_linear_data_offset(new_skb, 1008 -NET_IP_ALIGN, 1009 (skb->data - 1010 NET_IP_ALIGN), 1011 (length + 1012 NET_IP_ALIGN)); 1013 /* save the skb in buffer_info as good */ 1014 buffer_info->skb = skb; 1015 skb = new_skb; 1016 } 1017 /* else just continue with the old one */ 1018 } 1019 /* end copybreak code */ 1020 skb_put(skb, length); 1021 1022 /* Receive Checksum Offload */ 1023 e1000_rx_checksum(adapter, staterr, skb); 1024 1025 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb); 1026 1027 e1000_receive_skb(adapter, netdev, skb, staterr, 1028 rx_desc->wb.upper.vlan); 1029 1030 next_desc: 1031 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF); 1032 1033 /* return some buffers to hardware, one at a time is too slow */ 1034 if (cleaned_count >= E1000_RX_BUFFER_WRITE) { 1035 adapter->alloc_rx_buf(rx_ring, cleaned_count, 1036 GFP_ATOMIC); 1037 cleaned_count = 0; 1038 } 1039 1040 /* use prefetched values */ 1041 rx_desc = next_rxd; 1042 buffer_info = next_buffer; 1043 1044 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 1045 } 1046 rx_ring->next_to_clean = i; 1047 1048 cleaned_count = e1000_desc_unused(rx_ring); 1049 if (cleaned_count) 1050 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC); 1051 1052 adapter->total_rx_bytes += total_rx_bytes; 1053 adapter->total_rx_packets += total_rx_packets; 1054 return cleaned; 1055 } 1056 1057 static void e1000_put_txbuf(struct e1000_ring *tx_ring, 1058 struct e1000_buffer *buffer_info, 1059 bool drop) 1060 { 1061 struct e1000_adapter *adapter = tx_ring->adapter; 1062 1063 if (buffer_info->dma) { 1064 if (buffer_info->mapped_as_page) 1065 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, 1066 buffer_info->length, DMA_TO_DEVICE); 1067 else 1068 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma, 1069 buffer_info->length, DMA_TO_DEVICE); 1070 buffer_info->dma = 0; 1071 } 1072 if (buffer_info->skb) { 1073 if (drop) 1074 dev_kfree_skb_any(buffer_info->skb); 1075 else 1076 dev_consume_skb_any(buffer_info->skb); 1077 buffer_info->skb = NULL; 1078 } 1079 buffer_info->time_stamp = 0; 1080 } 1081 1082 static void e1000_print_hw_hang(struct work_struct *work) 1083 { 1084 struct e1000_adapter *adapter = container_of(work, 1085 struct e1000_adapter, 1086 print_hang_task); 1087 struct net_device *netdev = adapter->netdev; 1088 struct e1000_ring *tx_ring = adapter->tx_ring; 1089 unsigned int i = tx_ring->next_to_clean; 1090 unsigned int eop = tx_ring->buffer_info[i].next_to_watch; 1091 struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop); 1092 struct e1000_hw *hw = &adapter->hw; 1093 u16 phy_status, phy_1000t_status, phy_ext_status; 1094 u16 pci_status; 1095 1096 if (test_bit(__E1000_DOWN, &adapter->state)) 1097 return; 1098 1099 if (!adapter->tx_hang_recheck && (adapter->flags2 & FLAG2_DMA_BURST)) { 1100 /* May be block on write-back, flush and detect again 1101 * flush pending descriptor writebacks to memory 1102 */ 1103 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 1104 /* execute the writes immediately */ 1105 e1e_flush(); 1106 /* Due to rare timing issues, write to TIDV again to ensure 1107 * the write is successful 1108 */ 1109 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 1110 /* execute the writes immediately */ 1111 e1e_flush(); 1112 adapter->tx_hang_recheck = true; 1113 return; 1114 } 1115 adapter->tx_hang_recheck = false; 1116 1117 if (er32(TDH(0)) == er32(TDT(0))) { 1118 e_dbg("false hang detected, ignoring\n"); 1119 return; 1120 } 1121 1122 /* Real hang detected */ 1123 netif_stop_queue(netdev); 1124 1125 e1e_rphy(hw, MII_BMSR, &phy_status); 1126 e1e_rphy(hw, MII_STAT1000, &phy_1000t_status); 1127 e1e_rphy(hw, MII_ESTATUS, &phy_ext_status); 1128 1129 pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status); 1130 1131 /* detected Hardware unit hang */ 1132 e_err("Detected Hardware Unit Hang:\n" 1133 " TDH <%x>\n" 1134 " TDT <%x>\n" 1135 " next_to_use <%x>\n" 1136 " next_to_clean <%x>\n" 1137 "buffer_info[next_to_clean]:\n" 1138 " time_stamp <%lx>\n" 1139 " next_to_watch <%x>\n" 1140 " jiffies <%lx>\n" 1141 " next_to_watch.status <%x>\n" 1142 "MAC Status <%x>\n" 1143 "PHY Status <%x>\n" 1144 "PHY 1000BASE-T Status <%x>\n" 1145 "PHY Extended Status <%x>\n" 1146 "PCI Status <%x>\n", 1147 readl(tx_ring->head), readl(tx_ring->tail), tx_ring->next_to_use, 1148 tx_ring->next_to_clean, tx_ring->buffer_info[eop].time_stamp, 1149 eop, jiffies, eop_desc->upper.fields.status, er32(STATUS), 1150 phy_status, phy_1000t_status, phy_ext_status, pci_status); 1151 1152 e1000e_dump(adapter); 1153 1154 /* Suggest workaround for known h/w issue */ 1155 if ((hw->mac.type == e1000_pchlan) && (er32(CTRL) & E1000_CTRL_TFCE)) 1156 e_err("Try turning off Tx pause (flow control) via ethtool\n"); 1157 } 1158 1159 /** 1160 * e1000e_tx_hwtstamp_work - check for Tx time stamp 1161 * @work: pointer to work struct 1162 * 1163 * This work function polls the TSYNCTXCTL valid bit to determine when a 1164 * timestamp has been taken for the current stored skb. The timestamp must 1165 * be for this skb because only one such packet is allowed in the queue. 1166 */ 1167 static void e1000e_tx_hwtstamp_work(struct work_struct *work) 1168 { 1169 struct e1000_adapter *adapter = container_of(work, struct e1000_adapter, 1170 tx_hwtstamp_work); 1171 struct e1000_hw *hw = &adapter->hw; 1172 1173 if (er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_VALID) { 1174 struct sk_buff *skb = adapter->tx_hwtstamp_skb; 1175 struct skb_shared_hwtstamps shhwtstamps; 1176 u64 txstmp; 1177 1178 txstmp = er32(TXSTMPL); 1179 txstmp |= (u64)er32(TXSTMPH) << 32; 1180 1181 e1000e_systim_to_hwtstamp(adapter, &shhwtstamps, txstmp); 1182 1183 /* Clear the global tx_hwtstamp_skb pointer and force writes 1184 * prior to notifying the stack of a Tx timestamp. 1185 */ 1186 adapter->tx_hwtstamp_skb = NULL; 1187 wmb(); /* force write prior to skb_tstamp_tx */ 1188 1189 skb_tstamp_tx(skb, &shhwtstamps); 1190 dev_consume_skb_any(skb); 1191 } else if (time_after(jiffies, adapter->tx_hwtstamp_start 1192 + adapter->tx_timeout_factor * HZ)) { 1193 dev_kfree_skb_any(adapter->tx_hwtstamp_skb); 1194 adapter->tx_hwtstamp_skb = NULL; 1195 adapter->tx_hwtstamp_timeouts++; 1196 e_warn("clearing Tx timestamp hang\n"); 1197 } else { 1198 /* reschedule to check later */ 1199 schedule_work(&adapter->tx_hwtstamp_work); 1200 } 1201 } 1202 1203 /** 1204 * e1000_clean_tx_irq - Reclaim resources after transmit completes 1205 * @tx_ring: Tx descriptor ring 1206 * 1207 * the return value indicates whether actual cleaning was done, there 1208 * is no guarantee that everything was cleaned 1209 **/ 1210 static bool e1000_clean_tx_irq(struct e1000_ring *tx_ring) 1211 { 1212 struct e1000_adapter *adapter = tx_ring->adapter; 1213 struct net_device *netdev = adapter->netdev; 1214 struct e1000_hw *hw = &adapter->hw; 1215 struct e1000_tx_desc *tx_desc, *eop_desc; 1216 struct e1000_buffer *buffer_info; 1217 unsigned int i, eop; 1218 unsigned int count = 0; 1219 unsigned int total_tx_bytes = 0, total_tx_packets = 0; 1220 unsigned int bytes_compl = 0, pkts_compl = 0; 1221 1222 i = tx_ring->next_to_clean; 1223 eop = tx_ring->buffer_info[i].next_to_watch; 1224 eop_desc = E1000_TX_DESC(*tx_ring, eop); 1225 1226 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) && 1227 (count < tx_ring->count)) { 1228 bool cleaned = false; 1229 1230 dma_rmb(); /* read buffer_info after eop_desc */ 1231 for (; !cleaned; count++) { 1232 tx_desc = E1000_TX_DESC(*tx_ring, i); 1233 buffer_info = &tx_ring->buffer_info[i]; 1234 cleaned = (i == eop); 1235 1236 if (cleaned) { 1237 total_tx_packets += buffer_info->segs; 1238 total_tx_bytes += buffer_info->bytecount; 1239 if (buffer_info->skb) { 1240 bytes_compl += buffer_info->skb->len; 1241 pkts_compl++; 1242 } 1243 } 1244 1245 e1000_put_txbuf(tx_ring, buffer_info, false); 1246 tx_desc->upper.data = 0; 1247 1248 i++; 1249 if (i == tx_ring->count) 1250 i = 0; 1251 } 1252 1253 if (i == tx_ring->next_to_use) 1254 break; 1255 eop = tx_ring->buffer_info[i].next_to_watch; 1256 eop_desc = E1000_TX_DESC(*tx_ring, eop); 1257 } 1258 1259 tx_ring->next_to_clean = i; 1260 1261 netdev_completed_queue(netdev, pkts_compl, bytes_compl); 1262 1263 #define TX_WAKE_THRESHOLD 32 1264 if (count && netif_carrier_ok(netdev) && 1265 e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) { 1266 /* Make sure that anybody stopping the queue after this 1267 * sees the new next_to_clean. 1268 */ 1269 smp_mb(); 1270 1271 if (netif_queue_stopped(netdev) && 1272 !(test_bit(__E1000_DOWN, &adapter->state))) { 1273 netif_wake_queue(netdev); 1274 ++adapter->restart_queue; 1275 } 1276 } 1277 1278 if (adapter->detect_tx_hung) { 1279 /* Detect a transmit hang in hardware, this serializes the 1280 * check with the clearing of time_stamp and movement of i 1281 */ 1282 adapter->detect_tx_hung = false; 1283 if (tx_ring->buffer_info[i].time_stamp && 1284 time_after(jiffies, tx_ring->buffer_info[i].time_stamp 1285 + (adapter->tx_timeout_factor * HZ)) && 1286 !(er32(STATUS) & E1000_STATUS_TXOFF)) 1287 schedule_work(&adapter->print_hang_task); 1288 else 1289 adapter->tx_hang_recheck = false; 1290 } 1291 adapter->total_tx_bytes += total_tx_bytes; 1292 adapter->total_tx_packets += total_tx_packets; 1293 return count < tx_ring->count; 1294 } 1295 1296 /** 1297 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split 1298 * @rx_ring: Rx descriptor ring 1299 * @work_done: output parameter for indicating completed work 1300 * @work_to_do: how many packets we can clean 1301 * 1302 * the return value indicates whether actual cleaning was done, there 1303 * is no guarantee that everything was cleaned 1304 **/ 1305 static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done, 1306 int work_to_do) 1307 { 1308 struct e1000_adapter *adapter = rx_ring->adapter; 1309 struct e1000_hw *hw = &adapter->hw; 1310 union e1000_rx_desc_packet_split *rx_desc, *next_rxd; 1311 struct net_device *netdev = adapter->netdev; 1312 struct pci_dev *pdev = adapter->pdev; 1313 struct e1000_buffer *buffer_info, *next_buffer; 1314 struct e1000_ps_page *ps_page; 1315 struct sk_buff *skb; 1316 unsigned int i, j; 1317 u32 length, staterr; 1318 int cleaned_count = 0; 1319 bool cleaned = false; 1320 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 1321 1322 i = rx_ring->next_to_clean; 1323 rx_desc = E1000_RX_DESC_PS(*rx_ring, i); 1324 staterr = le32_to_cpu(rx_desc->wb.middle.status_error); 1325 buffer_info = &rx_ring->buffer_info[i]; 1326 1327 while (staterr & E1000_RXD_STAT_DD) { 1328 if (*work_done >= work_to_do) 1329 break; 1330 (*work_done)++; 1331 skb = buffer_info->skb; 1332 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */ 1333 1334 /* in the packet split case this is header only */ 1335 prefetch(skb->data - NET_IP_ALIGN); 1336 1337 i++; 1338 if (i == rx_ring->count) 1339 i = 0; 1340 next_rxd = E1000_RX_DESC_PS(*rx_ring, i); 1341 prefetch(next_rxd); 1342 1343 next_buffer = &rx_ring->buffer_info[i]; 1344 1345 cleaned = true; 1346 cleaned_count++; 1347 dma_unmap_single(&pdev->dev, buffer_info->dma, 1348 adapter->rx_ps_bsize0, DMA_FROM_DEVICE); 1349 buffer_info->dma = 0; 1350 1351 /* see !EOP comment in other Rx routine */ 1352 if (!(staterr & E1000_RXD_STAT_EOP)) 1353 adapter->flags2 |= FLAG2_IS_DISCARDING; 1354 1355 if (adapter->flags2 & FLAG2_IS_DISCARDING) { 1356 e_dbg("Packet Split buffers didn't pick up the full packet\n"); 1357 dev_kfree_skb_irq(skb); 1358 if (staterr & E1000_RXD_STAT_EOP) 1359 adapter->flags2 &= ~FLAG2_IS_DISCARDING; 1360 goto next_desc; 1361 } 1362 1363 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) && 1364 !(netdev->features & NETIF_F_RXALL))) { 1365 dev_kfree_skb_irq(skb); 1366 goto next_desc; 1367 } 1368 1369 length = le16_to_cpu(rx_desc->wb.middle.length0); 1370 1371 if (!length) { 1372 e_dbg("Last part of the packet spanning multiple descriptors\n"); 1373 dev_kfree_skb_irq(skb); 1374 goto next_desc; 1375 } 1376 1377 /* Good Receive */ 1378 skb_put(skb, length); 1379 1380 { 1381 /* this looks ugly, but it seems compiler issues make 1382 * it more efficient than reusing j 1383 */ 1384 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]); 1385 1386 /* page alloc/put takes too long and effects small 1387 * packet throughput, so unsplit small packets and 1388 * save the alloc/put only valid in softirq (napi) 1389 * context to call kmap_* 1390 */ 1391 if (l1 && (l1 <= copybreak) && 1392 ((length + l1) <= adapter->rx_ps_bsize0)) { 1393 u8 *vaddr; 1394 1395 ps_page = &buffer_info->ps_pages[0]; 1396 1397 /* there is no documentation about how to call 1398 * kmap_atomic, so we can't hold the mapping 1399 * very long 1400 */ 1401 dma_sync_single_for_cpu(&pdev->dev, 1402 ps_page->dma, 1403 PAGE_SIZE, 1404 DMA_FROM_DEVICE); 1405 vaddr = kmap_atomic(ps_page->page); 1406 memcpy(skb_tail_pointer(skb), vaddr, l1); 1407 kunmap_atomic(vaddr); 1408 dma_sync_single_for_device(&pdev->dev, 1409 ps_page->dma, 1410 PAGE_SIZE, 1411 DMA_FROM_DEVICE); 1412 1413 /* remove the CRC */ 1414 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) { 1415 if (!(netdev->features & NETIF_F_RXFCS)) 1416 l1 -= 4; 1417 } 1418 1419 skb_put(skb, l1); 1420 goto copydone; 1421 } /* if */ 1422 } 1423 1424 for (j = 0; j < PS_PAGE_BUFFERS; j++) { 1425 length = le16_to_cpu(rx_desc->wb.upper.length[j]); 1426 if (!length) 1427 break; 1428 1429 ps_page = &buffer_info->ps_pages[j]; 1430 dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE, 1431 DMA_FROM_DEVICE); 1432 ps_page->dma = 0; 1433 skb_fill_page_desc(skb, j, ps_page->page, 0, length); 1434 ps_page->page = NULL; 1435 skb->len += length; 1436 skb->data_len += length; 1437 skb->truesize += PAGE_SIZE; 1438 } 1439 1440 /* strip the ethernet crc, problem is we're using pages now so 1441 * this whole operation can get a little cpu intensive 1442 */ 1443 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) { 1444 if (!(netdev->features & NETIF_F_RXFCS)) 1445 pskb_trim(skb, skb->len - 4); 1446 } 1447 1448 copydone: 1449 total_rx_bytes += skb->len; 1450 total_rx_packets++; 1451 1452 e1000_rx_checksum(adapter, staterr, skb); 1453 1454 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb); 1455 1456 if (rx_desc->wb.upper.header_status & 1457 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)) 1458 adapter->rx_hdr_split++; 1459 1460 e1000_receive_skb(adapter, netdev, skb, staterr, 1461 rx_desc->wb.middle.vlan); 1462 1463 next_desc: 1464 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF); 1465 buffer_info->skb = NULL; 1466 1467 /* return some buffers to hardware, one at a time is too slow */ 1468 if (cleaned_count >= E1000_RX_BUFFER_WRITE) { 1469 adapter->alloc_rx_buf(rx_ring, cleaned_count, 1470 GFP_ATOMIC); 1471 cleaned_count = 0; 1472 } 1473 1474 /* use prefetched values */ 1475 rx_desc = next_rxd; 1476 buffer_info = next_buffer; 1477 1478 staterr = le32_to_cpu(rx_desc->wb.middle.status_error); 1479 } 1480 rx_ring->next_to_clean = i; 1481 1482 cleaned_count = e1000_desc_unused(rx_ring); 1483 if (cleaned_count) 1484 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC); 1485 1486 adapter->total_rx_bytes += total_rx_bytes; 1487 adapter->total_rx_packets += total_rx_packets; 1488 return cleaned; 1489 } 1490 1491 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb, 1492 u16 length) 1493 { 1494 bi->page = NULL; 1495 skb->len += length; 1496 skb->data_len += length; 1497 skb->truesize += PAGE_SIZE; 1498 } 1499 1500 /** 1501 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy 1502 * @rx_ring: Rx descriptor ring 1503 * @work_done: output parameter for indicating completed work 1504 * @work_to_do: how many packets we can clean 1505 * 1506 * the return value indicates whether actual cleaning was done, there 1507 * is no guarantee that everything was cleaned 1508 **/ 1509 static bool e1000_clean_jumbo_rx_irq(struct e1000_ring *rx_ring, int *work_done, 1510 int work_to_do) 1511 { 1512 struct e1000_adapter *adapter = rx_ring->adapter; 1513 struct net_device *netdev = adapter->netdev; 1514 struct pci_dev *pdev = adapter->pdev; 1515 union e1000_rx_desc_extended *rx_desc, *next_rxd; 1516 struct e1000_buffer *buffer_info, *next_buffer; 1517 u32 length, staterr; 1518 unsigned int i; 1519 int cleaned_count = 0; 1520 bool cleaned = false; 1521 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 1522 struct skb_shared_info *shinfo; 1523 1524 i = rx_ring->next_to_clean; 1525 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 1526 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 1527 buffer_info = &rx_ring->buffer_info[i]; 1528 1529 while (staterr & E1000_RXD_STAT_DD) { 1530 struct sk_buff *skb; 1531 1532 if (*work_done >= work_to_do) 1533 break; 1534 (*work_done)++; 1535 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */ 1536 1537 skb = buffer_info->skb; 1538 buffer_info->skb = NULL; 1539 1540 ++i; 1541 if (i == rx_ring->count) 1542 i = 0; 1543 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i); 1544 prefetch(next_rxd); 1545 1546 next_buffer = &rx_ring->buffer_info[i]; 1547 1548 cleaned = true; 1549 cleaned_count++; 1550 dma_unmap_page(&pdev->dev, buffer_info->dma, PAGE_SIZE, 1551 DMA_FROM_DEVICE); 1552 buffer_info->dma = 0; 1553 1554 length = le16_to_cpu(rx_desc->wb.upper.length); 1555 1556 /* errors is only valid for DD + EOP descriptors */ 1557 if (unlikely((staterr & E1000_RXD_STAT_EOP) && 1558 ((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) && 1559 !(netdev->features & NETIF_F_RXALL)))) { 1560 /* recycle both page and skb */ 1561 buffer_info->skb = skb; 1562 /* an error means any chain goes out the window too */ 1563 if (rx_ring->rx_skb_top) 1564 dev_kfree_skb_irq(rx_ring->rx_skb_top); 1565 rx_ring->rx_skb_top = NULL; 1566 goto next_desc; 1567 } 1568 #define rxtop (rx_ring->rx_skb_top) 1569 if (!(staterr & E1000_RXD_STAT_EOP)) { 1570 /* this descriptor is only the beginning (or middle) */ 1571 if (!rxtop) { 1572 /* this is the beginning of a chain */ 1573 rxtop = skb; 1574 skb_fill_page_desc(rxtop, 0, buffer_info->page, 1575 0, length); 1576 } else { 1577 /* this is the middle of a chain */ 1578 shinfo = skb_shinfo(rxtop); 1579 skb_fill_page_desc(rxtop, shinfo->nr_frags, 1580 buffer_info->page, 0, 1581 length); 1582 /* re-use the skb, only consumed the page */ 1583 buffer_info->skb = skb; 1584 } 1585 e1000_consume_page(buffer_info, rxtop, length); 1586 goto next_desc; 1587 } else { 1588 if (rxtop) { 1589 /* end of the chain */ 1590 shinfo = skb_shinfo(rxtop); 1591 skb_fill_page_desc(rxtop, shinfo->nr_frags, 1592 buffer_info->page, 0, 1593 length); 1594 /* re-use the current skb, we only consumed the 1595 * page 1596 */ 1597 buffer_info->skb = skb; 1598 skb = rxtop; 1599 rxtop = NULL; 1600 e1000_consume_page(buffer_info, skb, length); 1601 } else { 1602 /* no chain, got EOP, this buf is the packet 1603 * copybreak to save the put_page/alloc_page 1604 */ 1605 if (length <= copybreak && 1606 skb_tailroom(skb) >= length) { 1607 u8 *vaddr; 1608 vaddr = kmap_atomic(buffer_info->page); 1609 memcpy(skb_tail_pointer(skb), vaddr, 1610 length); 1611 kunmap_atomic(vaddr); 1612 /* re-use the page, so don't erase 1613 * buffer_info->page 1614 */ 1615 skb_put(skb, length); 1616 } else { 1617 skb_fill_page_desc(skb, 0, 1618 buffer_info->page, 0, 1619 length); 1620 e1000_consume_page(buffer_info, skb, 1621 length); 1622 } 1623 } 1624 } 1625 1626 /* Receive Checksum Offload */ 1627 e1000_rx_checksum(adapter, staterr, skb); 1628 1629 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb); 1630 1631 /* probably a little skewed due to removing CRC */ 1632 total_rx_bytes += skb->len; 1633 total_rx_packets++; 1634 1635 /* eth type trans needs skb->data to point to something */ 1636 if (!pskb_may_pull(skb, ETH_HLEN)) { 1637 e_err("pskb_may_pull failed.\n"); 1638 dev_kfree_skb_irq(skb); 1639 goto next_desc; 1640 } 1641 1642 e1000_receive_skb(adapter, netdev, skb, staterr, 1643 rx_desc->wb.upper.vlan); 1644 1645 next_desc: 1646 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF); 1647 1648 /* return some buffers to hardware, one at a time is too slow */ 1649 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { 1650 adapter->alloc_rx_buf(rx_ring, cleaned_count, 1651 GFP_ATOMIC); 1652 cleaned_count = 0; 1653 } 1654 1655 /* use prefetched values */ 1656 rx_desc = next_rxd; 1657 buffer_info = next_buffer; 1658 1659 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 1660 } 1661 rx_ring->next_to_clean = i; 1662 1663 cleaned_count = e1000_desc_unused(rx_ring); 1664 if (cleaned_count) 1665 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC); 1666 1667 adapter->total_rx_bytes += total_rx_bytes; 1668 adapter->total_rx_packets += total_rx_packets; 1669 return cleaned; 1670 } 1671 1672 /** 1673 * e1000_clean_rx_ring - Free Rx Buffers per Queue 1674 * @rx_ring: Rx descriptor ring 1675 **/ 1676 static void e1000_clean_rx_ring(struct e1000_ring *rx_ring) 1677 { 1678 struct e1000_adapter *adapter = rx_ring->adapter; 1679 struct e1000_buffer *buffer_info; 1680 struct e1000_ps_page *ps_page; 1681 struct pci_dev *pdev = adapter->pdev; 1682 unsigned int i, j; 1683 1684 /* Free all the Rx ring sk_buffs */ 1685 for (i = 0; i < rx_ring->count; i++) { 1686 buffer_info = &rx_ring->buffer_info[i]; 1687 if (buffer_info->dma) { 1688 if (adapter->clean_rx == e1000_clean_rx_irq) 1689 dma_unmap_single(&pdev->dev, buffer_info->dma, 1690 adapter->rx_buffer_len, 1691 DMA_FROM_DEVICE); 1692 else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq) 1693 dma_unmap_page(&pdev->dev, buffer_info->dma, 1694 PAGE_SIZE, DMA_FROM_DEVICE); 1695 else if (adapter->clean_rx == e1000_clean_rx_irq_ps) 1696 dma_unmap_single(&pdev->dev, buffer_info->dma, 1697 adapter->rx_ps_bsize0, 1698 DMA_FROM_DEVICE); 1699 buffer_info->dma = 0; 1700 } 1701 1702 if (buffer_info->page) { 1703 put_page(buffer_info->page); 1704 buffer_info->page = NULL; 1705 } 1706 1707 if (buffer_info->skb) { 1708 dev_kfree_skb(buffer_info->skb); 1709 buffer_info->skb = NULL; 1710 } 1711 1712 for (j = 0; j < PS_PAGE_BUFFERS; j++) { 1713 ps_page = &buffer_info->ps_pages[j]; 1714 if (!ps_page->page) 1715 break; 1716 dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE, 1717 DMA_FROM_DEVICE); 1718 ps_page->dma = 0; 1719 put_page(ps_page->page); 1720 ps_page->page = NULL; 1721 } 1722 } 1723 1724 /* there also may be some cached data from a chained receive */ 1725 if (rx_ring->rx_skb_top) { 1726 dev_kfree_skb(rx_ring->rx_skb_top); 1727 rx_ring->rx_skb_top = NULL; 1728 } 1729 1730 /* Zero out the descriptor ring */ 1731 memset(rx_ring->desc, 0, rx_ring->size); 1732 1733 rx_ring->next_to_clean = 0; 1734 rx_ring->next_to_use = 0; 1735 adapter->flags2 &= ~FLAG2_IS_DISCARDING; 1736 } 1737 1738 static void e1000e_downshift_workaround(struct work_struct *work) 1739 { 1740 struct e1000_adapter *adapter = container_of(work, 1741 struct e1000_adapter, 1742 downshift_task); 1743 1744 if (test_bit(__E1000_DOWN, &adapter->state)) 1745 return; 1746 1747 e1000e_gig_downshift_workaround_ich8lan(&adapter->hw); 1748 } 1749 1750 /** 1751 * e1000_intr_msi - Interrupt Handler 1752 * @irq: interrupt number 1753 * @data: pointer to a network interface device structure 1754 **/ 1755 static irqreturn_t e1000_intr_msi(int __always_unused irq, void *data) 1756 { 1757 struct net_device *netdev = data; 1758 struct e1000_adapter *adapter = netdev_priv(netdev); 1759 struct e1000_hw *hw = &adapter->hw; 1760 u32 icr = er32(ICR); 1761 1762 /* read ICR disables interrupts using IAM */ 1763 if (icr & E1000_ICR_LSC) { 1764 hw->mac.get_link_status = true; 1765 /* ICH8 workaround-- Call gig speed drop workaround on cable 1766 * disconnect (LSC) before accessing any PHY registers 1767 */ 1768 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) && 1769 (!(er32(STATUS) & E1000_STATUS_LU))) 1770 schedule_work(&adapter->downshift_task); 1771 1772 /* 80003ES2LAN workaround-- For packet buffer work-around on 1773 * link down event; disable receives here in the ISR and reset 1774 * adapter in watchdog 1775 */ 1776 if (netif_carrier_ok(netdev) && 1777 adapter->flags & FLAG_RX_NEEDS_RESTART) { 1778 /* disable receives */ 1779 u32 rctl = er32(RCTL); 1780 1781 ew32(RCTL, rctl & ~E1000_RCTL_EN); 1782 adapter->flags |= FLAG_RESTART_NOW; 1783 } 1784 /* guard against interrupt when we're going down */ 1785 if (!test_bit(__E1000_DOWN, &adapter->state)) 1786 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1787 } 1788 1789 /* Reset on uncorrectable ECC error */ 1790 if ((icr & E1000_ICR_ECCER) && (hw->mac.type >= e1000_pch_lpt)) { 1791 u32 pbeccsts = er32(PBECCSTS); 1792 1793 adapter->corr_errors += 1794 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK; 1795 adapter->uncorr_errors += 1796 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >> 1797 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT; 1798 1799 /* Do the reset outside of interrupt context */ 1800 schedule_work(&adapter->reset_task); 1801 1802 /* return immediately since reset is imminent */ 1803 return IRQ_HANDLED; 1804 } 1805 1806 if (napi_schedule_prep(&adapter->napi)) { 1807 adapter->total_tx_bytes = 0; 1808 adapter->total_tx_packets = 0; 1809 adapter->total_rx_bytes = 0; 1810 adapter->total_rx_packets = 0; 1811 __napi_schedule(&adapter->napi); 1812 } 1813 1814 return IRQ_HANDLED; 1815 } 1816 1817 /** 1818 * e1000_intr - Interrupt Handler 1819 * @irq: interrupt number 1820 * @data: pointer to a network interface device structure 1821 **/ 1822 static irqreturn_t e1000_intr(int __always_unused irq, void *data) 1823 { 1824 struct net_device *netdev = data; 1825 struct e1000_adapter *adapter = netdev_priv(netdev); 1826 struct e1000_hw *hw = &adapter->hw; 1827 u32 rctl, icr = er32(ICR); 1828 1829 if (!icr || test_bit(__E1000_DOWN, &adapter->state)) 1830 return IRQ_NONE; /* Not our interrupt */ 1831 1832 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is 1833 * not set, then the adapter didn't send an interrupt 1834 */ 1835 if (!(icr & E1000_ICR_INT_ASSERTED)) 1836 return IRQ_NONE; 1837 1838 /* Interrupt Auto-Mask...upon reading ICR, 1839 * interrupts are masked. No need for the 1840 * IMC write 1841 */ 1842 1843 if (icr & E1000_ICR_LSC) { 1844 hw->mac.get_link_status = true; 1845 /* ICH8 workaround-- Call gig speed drop workaround on cable 1846 * disconnect (LSC) before accessing any PHY registers 1847 */ 1848 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) && 1849 (!(er32(STATUS) & E1000_STATUS_LU))) 1850 schedule_work(&adapter->downshift_task); 1851 1852 /* 80003ES2LAN workaround-- 1853 * For packet buffer work-around on link down event; 1854 * disable receives here in the ISR and 1855 * reset adapter in watchdog 1856 */ 1857 if (netif_carrier_ok(netdev) && 1858 (adapter->flags & FLAG_RX_NEEDS_RESTART)) { 1859 /* disable receives */ 1860 rctl = er32(RCTL); 1861 ew32(RCTL, rctl & ~E1000_RCTL_EN); 1862 adapter->flags |= FLAG_RESTART_NOW; 1863 } 1864 /* guard against interrupt when we're going down */ 1865 if (!test_bit(__E1000_DOWN, &adapter->state)) 1866 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1867 } 1868 1869 /* Reset on uncorrectable ECC error */ 1870 if ((icr & E1000_ICR_ECCER) && (hw->mac.type >= e1000_pch_lpt)) { 1871 u32 pbeccsts = er32(PBECCSTS); 1872 1873 adapter->corr_errors += 1874 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK; 1875 adapter->uncorr_errors += 1876 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >> 1877 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT; 1878 1879 /* Do the reset outside of interrupt context */ 1880 schedule_work(&adapter->reset_task); 1881 1882 /* return immediately since reset is imminent */ 1883 return IRQ_HANDLED; 1884 } 1885 1886 if (napi_schedule_prep(&adapter->napi)) { 1887 adapter->total_tx_bytes = 0; 1888 adapter->total_tx_packets = 0; 1889 adapter->total_rx_bytes = 0; 1890 adapter->total_rx_packets = 0; 1891 __napi_schedule(&adapter->napi); 1892 } 1893 1894 return IRQ_HANDLED; 1895 } 1896 1897 static irqreturn_t e1000_msix_other(int __always_unused irq, void *data) 1898 { 1899 struct net_device *netdev = data; 1900 struct e1000_adapter *adapter = netdev_priv(netdev); 1901 struct e1000_hw *hw = &adapter->hw; 1902 u32 icr = er32(ICR); 1903 1904 if (icr & adapter->eiac_mask) 1905 ew32(ICS, (icr & adapter->eiac_mask)); 1906 1907 if (icr & E1000_ICR_LSC) { 1908 hw->mac.get_link_status = true; 1909 /* guard against interrupt when we're going down */ 1910 if (!test_bit(__E1000_DOWN, &adapter->state)) 1911 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1912 } 1913 1914 if (!test_bit(__E1000_DOWN, &adapter->state)) 1915 ew32(IMS, E1000_IMS_OTHER | IMS_OTHER_MASK); 1916 1917 return IRQ_HANDLED; 1918 } 1919 1920 static irqreturn_t e1000_intr_msix_tx(int __always_unused irq, void *data) 1921 { 1922 struct net_device *netdev = data; 1923 struct e1000_adapter *adapter = netdev_priv(netdev); 1924 struct e1000_hw *hw = &adapter->hw; 1925 struct e1000_ring *tx_ring = adapter->tx_ring; 1926 1927 adapter->total_tx_bytes = 0; 1928 adapter->total_tx_packets = 0; 1929 1930 if (!e1000_clean_tx_irq(tx_ring)) 1931 /* Ring was not completely cleaned, so fire another interrupt */ 1932 ew32(ICS, tx_ring->ims_val); 1933 1934 if (!test_bit(__E1000_DOWN, &adapter->state)) 1935 ew32(IMS, adapter->tx_ring->ims_val); 1936 1937 return IRQ_HANDLED; 1938 } 1939 1940 static irqreturn_t e1000_intr_msix_rx(int __always_unused irq, void *data) 1941 { 1942 struct net_device *netdev = data; 1943 struct e1000_adapter *adapter = netdev_priv(netdev); 1944 struct e1000_ring *rx_ring = adapter->rx_ring; 1945 1946 /* Write the ITR value calculated at the end of the 1947 * previous interrupt. 1948 */ 1949 if (rx_ring->set_itr) { 1950 u32 itr = rx_ring->itr_val ? 1951 1000000000 / (rx_ring->itr_val * 256) : 0; 1952 1953 writel(itr, rx_ring->itr_register); 1954 rx_ring->set_itr = 0; 1955 } 1956 1957 if (napi_schedule_prep(&adapter->napi)) { 1958 adapter->total_rx_bytes = 0; 1959 adapter->total_rx_packets = 0; 1960 __napi_schedule(&adapter->napi); 1961 } 1962 return IRQ_HANDLED; 1963 } 1964 1965 /** 1966 * e1000_configure_msix - Configure MSI-X hardware 1967 * @adapter: board private structure 1968 * 1969 * e1000_configure_msix sets up the hardware to properly 1970 * generate MSI-X interrupts. 1971 **/ 1972 static void e1000_configure_msix(struct e1000_adapter *adapter) 1973 { 1974 struct e1000_hw *hw = &adapter->hw; 1975 struct e1000_ring *rx_ring = adapter->rx_ring; 1976 struct e1000_ring *tx_ring = adapter->tx_ring; 1977 int vector = 0; 1978 u32 ctrl_ext, ivar = 0; 1979 1980 adapter->eiac_mask = 0; 1981 1982 /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */ 1983 if (hw->mac.type == e1000_82574) { 1984 u32 rfctl = er32(RFCTL); 1985 1986 rfctl |= E1000_RFCTL_ACK_DIS; 1987 ew32(RFCTL, rfctl); 1988 } 1989 1990 /* Configure Rx vector */ 1991 rx_ring->ims_val = E1000_IMS_RXQ0; 1992 adapter->eiac_mask |= rx_ring->ims_val; 1993 if (rx_ring->itr_val) 1994 writel(1000000000 / (rx_ring->itr_val * 256), 1995 rx_ring->itr_register); 1996 else 1997 writel(1, rx_ring->itr_register); 1998 ivar = E1000_IVAR_INT_ALLOC_VALID | vector; 1999 2000 /* Configure Tx vector */ 2001 tx_ring->ims_val = E1000_IMS_TXQ0; 2002 vector++; 2003 if (tx_ring->itr_val) 2004 writel(1000000000 / (tx_ring->itr_val * 256), 2005 tx_ring->itr_register); 2006 else 2007 writel(1, tx_ring->itr_register); 2008 adapter->eiac_mask |= tx_ring->ims_val; 2009 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8); 2010 2011 /* set vector for Other Causes, e.g. link changes */ 2012 vector++; 2013 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16); 2014 if (rx_ring->itr_val) 2015 writel(1000000000 / (rx_ring->itr_val * 256), 2016 hw->hw_addr + E1000_EITR_82574(vector)); 2017 else 2018 writel(1, hw->hw_addr + E1000_EITR_82574(vector)); 2019 2020 /* Cause Tx interrupts on every write back */ 2021 ivar |= BIT(31); 2022 2023 ew32(IVAR, ivar); 2024 2025 /* enable MSI-X PBA support */ 2026 ctrl_ext = er32(CTRL_EXT) & ~E1000_CTRL_EXT_IAME; 2027 ctrl_ext |= E1000_CTRL_EXT_PBA_CLR | E1000_CTRL_EXT_EIAME; 2028 ew32(CTRL_EXT, ctrl_ext); 2029 e1e_flush(); 2030 } 2031 2032 void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter) 2033 { 2034 if (adapter->msix_entries) { 2035 pci_disable_msix(adapter->pdev); 2036 kfree(adapter->msix_entries); 2037 adapter->msix_entries = NULL; 2038 } else if (adapter->flags & FLAG_MSI_ENABLED) { 2039 pci_disable_msi(adapter->pdev); 2040 adapter->flags &= ~FLAG_MSI_ENABLED; 2041 } 2042 } 2043 2044 /** 2045 * e1000e_set_interrupt_capability - set MSI or MSI-X if supported 2046 * @adapter: board private structure 2047 * 2048 * Attempt to configure interrupts using the best available 2049 * capabilities of the hardware and kernel. 2050 **/ 2051 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter) 2052 { 2053 int err; 2054 int i; 2055 2056 switch (adapter->int_mode) { 2057 case E1000E_INT_MODE_MSIX: 2058 if (adapter->flags & FLAG_HAS_MSIX) { 2059 adapter->num_vectors = 3; /* RxQ0, TxQ0 and other */ 2060 adapter->msix_entries = kcalloc(adapter->num_vectors, 2061 sizeof(struct 2062 msix_entry), 2063 GFP_KERNEL); 2064 if (adapter->msix_entries) { 2065 struct e1000_adapter *a = adapter; 2066 2067 for (i = 0; i < adapter->num_vectors; i++) 2068 adapter->msix_entries[i].entry = i; 2069 2070 err = pci_enable_msix_range(a->pdev, 2071 a->msix_entries, 2072 a->num_vectors, 2073 a->num_vectors); 2074 if (err > 0) 2075 return; 2076 } 2077 /* MSI-X failed, so fall through and try MSI */ 2078 e_err("Failed to initialize MSI-X interrupts. Falling back to MSI interrupts.\n"); 2079 e1000e_reset_interrupt_capability(adapter); 2080 } 2081 adapter->int_mode = E1000E_INT_MODE_MSI; 2082 fallthrough; 2083 case E1000E_INT_MODE_MSI: 2084 if (!pci_enable_msi(adapter->pdev)) { 2085 adapter->flags |= FLAG_MSI_ENABLED; 2086 } else { 2087 adapter->int_mode = E1000E_INT_MODE_LEGACY; 2088 e_err("Failed to initialize MSI interrupts. Falling back to legacy interrupts.\n"); 2089 } 2090 fallthrough; 2091 case E1000E_INT_MODE_LEGACY: 2092 /* Don't do anything; this is the system default */ 2093 break; 2094 } 2095 2096 /* store the number of vectors being used */ 2097 adapter->num_vectors = 1; 2098 } 2099 2100 /** 2101 * e1000_request_msix - Initialize MSI-X interrupts 2102 * @adapter: board private structure 2103 * 2104 * e1000_request_msix allocates MSI-X vectors and requests interrupts from the 2105 * kernel. 2106 **/ 2107 static int e1000_request_msix(struct e1000_adapter *adapter) 2108 { 2109 struct net_device *netdev = adapter->netdev; 2110 int err = 0, vector = 0; 2111 2112 if (strlen(netdev->name) < (IFNAMSIZ - 5)) 2113 snprintf(adapter->rx_ring->name, 2114 sizeof(adapter->rx_ring->name) - 1, 2115 "%.14s-rx-0", netdev->name); 2116 else 2117 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ); 2118 err = request_irq(adapter->msix_entries[vector].vector, 2119 e1000_intr_msix_rx, 0, adapter->rx_ring->name, 2120 netdev); 2121 if (err) 2122 return err; 2123 adapter->rx_ring->itr_register = adapter->hw.hw_addr + 2124 E1000_EITR_82574(vector); 2125 adapter->rx_ring->itr_val = adapter->itr; 2126 vector++; 2127 2128 if (strlen(netdev->name) < (IFNAMSIZ - 5)) 2129 snprintf(adapter->tx_ring->name, 2130 sizeof(adapter->tx_ring->name) - 1, 2131 "%.14s-tx-0", netdev->name); 2132 else 2133 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ); 2134 err = request_irq(adapter->msix_entries[vector].vector, 2135 e1000_intr_msix_tx, 0, adapter->tx_ring->name, 2136 netdev); 2137 if (err) 2138 return err; 2139 adapter->tx_ring->itr_register = adapter->hw.hw_addr + 2140 E1000_EITR_82574(vector); 2141 adapter->tx_ring->itr_val = adapter->itr; 2142 vector++; 2143 2144 err = request_irq(adapter->msix_entries[vector].vector, 2145 e1000_msix_other, 0, netdev->name, netdev); 2146 if (err) 2147 return err; 2148 2149 e1000_configure_msix(adapter); 2150 2151 return 0; 2152 } 2153 2154 /** 2155 * e1000_request_irq - initialize interrupts 2156 * @adapter: board private structure 2157 * 2158 * Attempts to configure interrupts using the best available 2159 * capabilities of the hardware and kernel. 2160 **/ 2161 static int e1000_request_irq(struct e1000_adapter *adapter) 2162 { 2163 struct net_device *netdev = adapter->netdev; 2164 int err; 2165 2166 if (adapter->msix_entries) { 2167 err = e1000_request_msix(adapter); 2168 if (!err) 2169 return err; 2170 /* fall back to MSI */ 2171 e1000e_reset_interrupt_capability(adapter); 2172 adapter->int_mode = E1000E_INT_MODE_MSI; 2173 e1000e_set_interrupt_capability(adapter); 2174 } 2175 if (adapter->flags & FLAG_MSI_ENABLED) { 2176 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0, 2177 netdev->name, netdev); 2178 if (!err) 2179 return err; 2180 2181 /* fall back to legacy interrupt */ 2182 e1000e_reset_interrupt_capability(adapter); 2183 adapter->int_mode = E1000E_INT_MODE_LEGACY; 2184 } 2185 2186 err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED, 2187 netdev->name, netdev); 2188 if (err) 2189 e_err("Unable to allocate interrupt, Error: %d\n", err); 2190 2191 return err; 2192 } 2193 2194 static void e1000_free_irq(struct e1000_adapter *adapter) 2195 { 2196 struct net_device *netdev = adapter->netdev; 2197 2198 if (adapter->msix_entries) { 2199 int vector = 0; 2200 2201 free_irq(adapter->msix_entries[vector].vector, netdev); 2202 vector++; 2203 2204 free_irq(adapter->msix_entries[vector].vector, netdev); 2205 vector++; 2206 2207 /* Other Causes interrupt vector */ 2208 free_irq(adapter->msix_entries[vector].vector, netdev); 2209 return; 2210 } 2211 2212 free_irq(adapter->pdev->irq, netdev); 2213 } 2214 2215 /** 2216 * e1000_irq_disable - Mask off interrupt generation on the NIC 2217 * @adapter: board private structure 2218 **/ 2219 static void e1000_irq_disable(struct e1000_adapter *adapter) 2220 { 2221 struct e1000_hw *hw = &adapter->hw; 2222 2223 ew32(IMC, ~0); 2224 if (adapter->msix_entries) 2225 ew32(EIAC_82574, 0); 2226 e1e_flush(); 2227 2228 if (adapter->msix_entries) { 2229 int i; 2230 2231 for (i = 0; i < adapter->num_vectors; i++) 2232 synchronize_irq(adapter->msix_entries[i].vector); 2233 } else { 2234 synchronize_irq(adapter->pdev->irq); 2235 } 2236 } 2237 2238 /** 2239 * e1000_irq_enable - Enable default interrupt generation settings 2240 * @adapter: board private structure 2241 **/ 2242 static void e1000_irq_enable(struct e1000_adapter *adapter) 2243 { 2244 struct e1000_hw *hw = &adapter->hw; 2245 2246 if (adapter->msix_entries) { 2247 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574); 2248 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | 2249 IMS_OTHER_MASK); 2250 } else if (hw->mac.type >= e1000_pch_lpt) { 2251 ew32(IMS, IMS_ENABLE_MASK | E1000_IMS_ECCER); 2252 } else { 2253 ew32(IMS, IMS_ENABLE_MASK); 2254 } 2255 e1e_flush(); 2256 } 2257 2258 /** 2259 * e1000e_get_hw_control - get control of the h/w from f/w 2260 * @adapter: address of board private structure 2261 * 2262 * e1000e_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit. 2263 * For ASF and Pass Through versions of f/w this means that 2264 * the driver is loaded. For AMT version (only with 82573) 2265 * of the f/w this means that the network i/f is open. 2266 **/ 2267 void e1000e_get_hw_control(struct e1000_adapter *adapter) 2268 { 2269 struct e1000_hw *hw = &adapter->hw; 2270 u32 ctrl_ext; 2271 u32 swsm; 2272 2273 /* Let firmware know the driver has taken over */ 2274 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) { 2275 swsm = er32(SWSM); 2276 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD); 2277 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) { 2278 ctrl_ext = er32(CTRL_EXT); 2279 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD); 2280 } 2281 } 2282 2283 /** 2284 * e1000e_release_hw_control - release control of the h/w to f/w 2285 * @adapter: address of board private structure 2286 * 2287 * e1000e_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit. 2288 * For ASF and Pass Through versions of f/w this means that the 2289 * driver is no longer loaded. For AMT version (only with 82573) i 2290 * of the f/w this means that the network i/f is closed. 2291 * 2292 **/ 2293 void e1000e_release_hw_control(struct e1000_adapter *adapter) 2294 { 2295 struct e1000_hw *hw = &adapter->hw; 2296 u32 ctrl_ext; 2297 u32 swsm; 2298 2299 /* Let firmware taken over control of h/w */ 2300 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) { 2301 swsm = er32(SWSM); 2302 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD); 2303 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) { 2304 ctrl_ext = er32(CTRL_EXT); 2305 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD); 2306 } 2307 } 2308 2309 /** 2310 * e1000_alloc_ring_dma - allocate memory for a ring structure 2311 * @adapter: board private structure 2312 * @ring: ring struct for which to allocate dma 2313 **/ 2314 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter, 2315 struct e1000_ring *ring) 2316 { 2317 struct pci_dev *pdev = adapter->pdev; 2318 2319 ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma, 2320 GFP_KERNEL); 2321 if (!ring->desc) 2322 return -ENOMEM; 2323 2324 return 0; 2325 } 2326 2327 /** 2328 * e1000e_setup_tx_resources - allocate Tx resources (Descriptors) 2329 * @tx_ring: Tx descriptor ring 2330 * 2331 * Return 0 on success, negative on failure 2332 **/ 2333 int e1000e_setup_tx_resources(struct e1000_ring *tx_ring) 2334 { 2335 struct e1000_adapter *adapter = tx_ring->adapter; 2336 int err = -ENOMEM, size; 2337 2338 size = sizeof(struct e1000_buffer) * tx_ring->count; 2339 tx_ring->buffer_info = vzalloc(size); 2340 if (!tx_ring->buffer_info) 2341 goto err; 2342 2343 /* round up to nearest 4K */ 2344 tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc); 2345 tx_ring->size = ALIGN(tx_ring->size, 4096); 2346 2347 err = e1000_alloc_ring_dma(adapter, tx_ring); 2348 if (err) 2349 goto err; 2350 2351 tx_ring->next_to_use = 0; 2352 tx_ring->next_to_clean = 0; 2353 2354 return 0; 2355 err: 2356 vfree(tx_ring->buffer_info); 2357 e_err("Unable to allocate memory for the transmit descriptor ring\n"); 2358 return err; 2359 } 2360 2361 /** 2362 * e1000e_setup_rx_resources - allocate Rx resources (Descriptors) 2363 * @rx_ring: Rx descriptor ring 2364 * 2365 * Returns 0 on success, negative on failure 2366 **/ 2367 int e1000e_setup_rx_resources(struct e1000_ring *rx_ring) 2368 { 2369 struct e1000_adapter *adapter = rx_ring->adapter; 2370 struct e1000_buffer *buffer_info; 2371 int i, size, desc_len, err = -ENOMEM; 2372 2373 size = sizeof(struct e1000_buffer) * rx_ring->count; 2374 rx_ring->buffer_info = vzalloc(size); 2375 if (!rx_ring->buffer_info) 2376 goto err; 2377 2378 for (i = 0; i < rx_ring->count; i++) { 2379 buffer_info = &rx_ring->buffer_info[i]; 2380 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS, 2381 sizeof(struct e1000_ps_page), 2382 GFP_KERNEL); 2383 if (!buffer_info->ps_pages) 2384 goto err_pages; 2385 } 2386 2387 desc_len = sizeof(union e1000_rx_desc_packet_split); 2388 2389 /* Round up to nearest 4K */ 2390 rx_ring->size = rx_ring->count * desc_len; 2391 rx_ring->size = ALIGN(rx_ring->size, 4096); 2392 2393 err = e1000_alloc_ring_dma(adapter, rx_ring); 2394 if (err) 2395 goto err_pages; 2396 2397 rx_ring->next_to_clean = 0; 2398 rx_ring->next_to_use = 0; 2399 rx_ring->rx_skb_top = NULL; 2400 2401 return 0; 2402 2403 err_pages: 2404 for (i = 0; i < rx_ring->count; i++) { 2405 buffer_info = &rx_ring->buffer_info[i]; 2406 kfree(buffer_info->ps_pages); 2407 } 2408 err: 2409 vfree(rx_ring->buffer_info); 2410 e_err("Unable to allocate memory for the receive descriptor ring\n"); 2411 return err; 2412 } 2413 2414 /** 2415 * e1000_clean_tx_ring - Free Tx Buffers 2416 * @tx_ring: Tx descriptor ring 2417 **/ 2418 static void e1000_clean_tx_ring(struct e1000_ring *tx_ring) 2419 { 2420 struct e1000_adapter *adapter = tx_ring->adapter; 2421 struct e1000_buffer *buffer_info; 2422 unsigned long size; 2423 unsigned int i; 2424 2425 for (i = 0; i < tx_ring->count; i++) { 2426 buffer_info = &tx_ring->buffer_info[i]; 2427 e1000_put_txbuf(tx_ring, buffer_info, false); 2428 } 2429 2430 netdev_reset_queue(adapter->netdev); 2431 size = sizeof(struct e1000_buffer) * tx_ring->count; 2432 memset(tx_ring->buffer_info, 0, size); 2433 2434 memset(tx_ring->desc, 0, tx_ring->size); 2435 2436 tx_ring->next_to_use = 0; 2437 tx_ring->next_to_clean = 0; 2438 } 2439 2440 /** 2441 * e1000e_free_tx_resources - Free Tx Resources per Queue 2442 * @tx_ring: Tx descriptor ring 2443 * 2444 * Free all transmit software resources 2445 **/ 2446 void e1000e_free_tx_resources(struct e1000_ring *tx_ring) 2447 { 2448 struct e1000_adapter *adapter = tx_ring->adapter; 2449 struct pci_dev *pdev = adapter->pdev; 2450 2451 e1000_clean_tx_ring(tx_ring); 2452 2453 vfree(tx_ring->buffer_info); 2454 tx_ring->buffer_info = NULL; 2455 2456 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, 2457 tx_ring->dma); 2458 tx_ring->desc = NULL; 2459 } 2460 2461 /** 2462 * e1000e_free_rx_resources - Free Rx Resources 2463 * @rx_ring: Rx descriptor ring 2464 * 2465 * Free all receive software resources 2466 **/ 2467 void e1000e_free_rx_resources(struct e1000_ring *rx_ring) 2468 { 2469 struct e1000_adapter *adapter = rx_ring->adapter; 2470 struct pci_dev *pdev = adapter->pdev; 2471 int i; 2472 2473 e1000_clean_rx_ring(rx_ring); 2474 2475 for (i = 0; i < rx_ring->count; i++) 2476 kfree(rx_ring->buffer_info[i].ps_pages); 2477 2478 vfree(rx_ring->buffer_info); 2479 rx_ring->buffer_info = NULL; 2480 2481 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, 2482 rx_ring->dma); 2483 rx_ring->desc = NULL; 2484 } 2485 2486 /** 2487 * e1000_update_itr - update the dynamic ITR value based on statistics 2488 * @itr_setting: current adapter->itr 2489 * @packets: the number of packets during this measurement interval 2490 * @bytes: the number of bytes during this measurement interval 2491 * 2492 * Stores a new ITR value based on packets and byte 2493 * counts during the last interrupt. The advantage of per interrupt 2494 * computation is faster updates and more accurate ITR for the current 2495 * traffic pattern. Constants in this function were computed 2496 * based on theoretical maximum wire speed and thresholds were set based 2497 * on testing data as well as attempting to minimize response time 2498 * while increasing bulk throughput. This functionality is controlled 2499 * by the InterruptThrottleRate module parameter. 2500 **/ 2501 static unsigned int e1000_update_itr(u16 itr_setting, int packets, int bytes) 2502 { 2503 unsigned int retval = itr_setting; 2504 2505 if (packets == 0) 2506 return itr_setting; 2507 2508 switch (itr_setting) { 2509 case lowest_latency: 2510 /* handle TSO and jumbo frames */ 2511 if (bytes / packets > 8000) 2512 retval = bulk_latency; 2513 else if ((packets < 5) && (bytes > 512)) 2514 retval = low_latency; 2515 break; 2516 case low_latency: /* 50 usec aka 20000 ints/s */ 2517 if (bytes > 10000) { 2518 /* this if handles the TSO accounting */ 2519 if (bytes / packets > 8000) 2520 retval = bulk_latency; 2521 else if ((packets < 10) || ((bytes / packets) > 1200)) 2522 retval = bulk_latency; 2523 else if ((packets > 35)) 2524 retval = lowest_latency; 2525 } else if (bytes / packets > 2000) { 2526 retval = bulk_latency; 2527 } else if (packets <= 2 && bytes < 512) { 2528 retval = lowest_latency; 2529 } 2530 break; 2531 case bulk_latency: /* 250 usec aka 4000 ints/s */ 2532 if (bytes > 25000) { 2533 if (packets > 35) 2534 retval = low_latency; 2535 } else if (bytes < 6000) { 2536 retval = low_latency; 2537 } 2538 break; 2539 } 2540 2541 return retval; 2542 } 2543 2544 static void e1000_set_itr(struct e1000_adapter *adapter) 2545 { 2546 u16 current_itr; 2547 u32 new_itr = adapter->itr; 2548 2549 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */ 2550 if (adapter->link_speed != SPEED_1000) { 2551 current_itr = 0; 2552 new_itr = 4000; 2553 goto set_itr_now; 2554 } 2555 2556 if (adapter->flags2 & FLAG2_DISABLE_AIM) { 2557 new_itr = 0; 2558 goto set_itr_now; 2559 } 2560 2561 adapter->tx_itr = e1000_update_itr(adapter->tx_itr, 2562 adapter->total_tx_packets, 2563 adapter->total_tx_bytes); 2564 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 2565 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency) 2566 adapter->tx_itr = low_latency; 2567 2568 adapter->rx_itr = e1000_update_itr(adapter->rx_itr, 2569 adapter->total_rx_packets, 2570 adapter->total_rx_bytes); 2571 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 2572 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency) 2573 adapter->rx_itr = low_latency; 2574 2575 current_itr = max(adapter->rx_itr, adapter->tx_itr); 2576 2577 /* counts and packets in update_itr are dependent on these numbers */ 2578 switch (current_itr) { 2579 case lowest_latency: 2580 new_itr = 70000; 2581 break; 2582 case low_latency: 2583 new_itr = 20000; /* aka hwitr = ~200 */ 2584 break; 2585 case bulk_latency: 2586 new_itr = 4000; 2587 break; 2588 default: 2589 break; 2590 } 2591 2592 set_itr_now: 2593 if (new_itr != adapter->itr) { 2594 /* this attempts to bias the interrupt rate towards Bulk 2595 * by adding intermediate steps when interrupt rate is 2596 * increasing 2597 */ 2598 new_itr = new_itr > adapter->itr ? 2599 min(adapter->itr + (new_itr >> 2), new_itr) : new_itr; 2600 adapter->itr = new_itr; 2601 adapter->rx_ring->itr_val = new_itr; 2602 if (adapter->msix_entries) 2603 adapter->rx_ring->set_itr = 1; 2604 else 2605 e1000e_write_itr(adapter, new_itr); 2606 } 2607 } 2608 2609 /** 2610 * e1000e_write_itr - write the ITR value to the appropriate registers 2611 * @adapter: address of board private structure 2612 * @itr: new ITR value to program 2613 * 2614 * e1000e_write_itr determines if the adapter is in MSI-X mode 2615 * and, if so, writes the EITR registers with the ITR value. 2616 * Otherwise, it writes the ITR value into the ITR register. 2617 **/ 2618 void e1000e_write_itr(struct e1000_adapter *adapter, u32 itr) 2619 { 2620 struct e1000_hw *hw = &adapter->hw; 2621 u32 new_itr = itr ? 1000000000 / (itr * 256) : 0; 2622 2623 if (adapter->msix_entries) { 2624 int vector; 2625 2626 for (vector = 0; vector < adapter->num_vectors; vector++) 2627 writel(new_itr, hw->hw_addr + E1000_EITR_82574(vector)); 2628 } else { 2629 ew32(ITR, new_itr); 2630 } 2631 } 2632 2633 /** 2634 * e1000_alloc_queues - Allocate memory for all rings 2635 * @adapter: board private structure to initialize 2636 **/ 2637 static int e1000_alloc_queues(struct e1000_adapter *adapter) 2638 { 2639 int size = sizeof(struct e1000_ring); 2640 2641 adapter->tx_ring = kzalloc(size, GFP_KERNEL); 2642 if (!adapter->tx_ring) 2643 goto err; 2644 adapter->tx_ring->count = adapter->tx_ring_count; 2645 adapter->tx_ring->adapter = adapter; 2646 2647 adapter->rx_ring = kzalloc(size, GFP_KERNEL); 2648 if (!adapter->rx_ring) 2649 goto err; 2650 adapter->rx_ring->count = adapter->rx_ring_count; 2651 adapter->rx_ring->adapter = adapter; 2652 2653 return 0; 2654 err: 2655 e_err("Unable to allocate memory for queues\n"); 2656 kfree(adapter->rx_ring); 2657 kfree(adapter->tx_ring); 2658 return -ENOMEM; 2659 } 2660 2661 /** 2662 * e1000e_poll - NAPI Rx polling callback 2663 * @napi: struct associated with this polling callback 2664 * @budget: number of packets driver is allowed to process this poll 2665 **/ 2666 static int e1000e_poll(struct napi_struct *napi, int budget) 2667 { 2668 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, 2669 napi); 2670 struct e1000_hw *hw = &adapter->hw; 2671 struct net_device *poll_dev = adapter->netdev; 2672 int tx_cleaned = 1, work_done = 0; 2673 2674 adapter = netdev_priv(poll_dev); 2675 2676 if (!adapter->msix_entries || 2677 (adapter->rx_ring->ims_val & adapter->tx_ring->ims_val)) 2678 tx_cleaned = e1000_clean_tx_irq(adapter->tx_ring); 2679 2680 adapter->clean_rx(adapter->rx_ring, &work_done, budget); 2681 2682 if (!tx_cleaned || work_done == budget) 2683 return budget; 2684 2685 /* Exit the polling mode, but don't re-enable interrupts if stack might 2686 * poll us due to busy-polling 2687 */ 2688 if (likely(napi_complete_done(napi, work_done))) { 2689 if (adapter->itr_setting & 3) 2690 e1000_set_itr(adapter); 2691 if (!test_bit(__E1000_DOWN, &adapter->state)) { 2692 if (adapter->msix_entries) 2693 ew32(IMS, adapter->rx_ring->ims_val); 2694 else 2695 e1000_irq_enable(adapter); 2696 } 2697 } 2698 2699 return work_done; 2700 } 2701 2702 static int e1000_vlan_rx_add_vid(struct net_device *netdev, 2703 __always_unused __be16 proto, u16 vid) 2704 { 2705 struct e1000_adapter *adapter = netdev_priv(netdev); 2706 struct e1000_hw *hw = &adapter->hw; 2707 u32 vfta, index; 2708 2709 /* don't update vlan cookie if already programmed */ 2710 if ((adapter->hw.mng_cookie.status & 2711 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) && 2712 (vid == adapter->mng_vlan_id)) 2713 return 0; 2714 2715 /* add VID to filter table */ 2716 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2717 index = (vid >> 5) & 0x7F; 2718 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index); 2719 vfta |= BIT((vid & 0x1F)); 2720 hw->mac.ops.write_vfta(hw, index, vfta); 2721 } 2722 2723 set_bit(vid, adapter->active_vlans); 2724 2725 return 0; 2726 } 2727 2728 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, 2729 __always_unused __be16 proto, u16 vid) 2730 { 2731 struct e1000_adapter *adapter = netdev_priv(netdev); 2732 struct e1000_hw *hw = &adapter->hw; 2733 u32 vfta, index; 2734 2735 if ((adapter->hw.mng_cookie.status & 2736 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) && 2737 (vid == adapter->mng_vlan_id)) { 2738 /* release control to f/w */ 2739 e1000e_release_hw_control(adapter); 2740 return 0; 2741 } 2742 2743 /* remove VID from filter table */ 2744 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2745 index = (vid >> 5) & 0x7F; 2746 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index); 2747 vfta &= ~BIT((vid & 0x1F)); 2748 hw->mac.ops.write_vfta(hw, index, vfta); 2749 } 2750 2751 clear_bit(vid, adapter->active_vlans); 2752 2753 return 0; 2754 } 2755 2756 /** 2757 * e1000e_vlan_filter_disable - helper to disable hw VLAN filtering 2758 * @adapter: board private structure to initialize 2759 **/ 2760 static void e1000e_vlan_filter_disable(struct e1000_adapter *adapter) 2761 { 2762 struct net_device *netdev = adapter->netdev; 2763 struct e1000_hw *hw = &adapter->hw; 2764 u32 rctl; 2765 2766 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2767 /* disable VLAN receive filtering */ 2768 rctl = er32(RCTL); 2769 rctl &= ~(E1000_RCTL_VFE | E1000_RCTL_CFIEN); 2770 ew32(RCTL, rctl); 2771 2772 if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) { 2773 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), 2774 adapter->mng_vlan_id); 2775 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; 2776 } 2777 } 2778 } 2779 2780 /** 2781 * e1000e_vlan_filter_enable - helper to enable HW VLAN filtering 2782 * @adapter: board private structure to initialize 2783 **/ 2784 static void e1000e_vlan_filter_enable(struct e1000_adapter *adapter) 2785 { 2786 struct e1000_hw *hw = &adapter->hw; 2787 u32 rctl; 2788 2789 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2790 /* enable VLAN receive filtering */ 2791 rctl = er32(RCTL); 2792 rctl |= E1000_RCTL_VFE; 2793 rctl &= ~E1000_RCTL_CFIEN; 2794 ew32(RCTL, rctl); 2795 } 2796 } 2797 2798 /** 2799 * e1000e_vlan_strip_disable - helper to disable HW VLAN stripping 2800 * @adapter: board private structure to initialize 2801 **/ 2802 static void e1000e_vlan_strip_disable(struct e1000_adapter *adapter) 2803 { 2804 struct e1000_hw *hw = &adapter->hw; 2805 u32 ctrl; 2806 2807 /* disable VLAN tag insert/strip */ 2808 ctrl = er32(CTRL); 2809 ctrl &= ~E1000_CTRL_VME; 2810 ew32(CTRL, ctrl); 2811 } 2812 2813 /** 2814 * e1000e_vlan_strip_enable - helper to enable HW VLAN stripping 2815 * @adapter: board private structure to initialize 2816 **/ 2817 static void e1000e_vlan_strip_enable(struct e1000_adapter *adapter) 2818 { 2819 struct e1000_hw *hw = &adapter->hw; 2820 u32 ctrl; 2821 2822 /* enable VLAN tag insert/strip */ 2823 ctrl = er32(CTRL); 2824 ctrl |= E1000_CTRL_VME; 2825 ew32(CTRL, ctrl); 2826 } 2827 2828 static void e1000_update_mng_vlan(struct e1000_adapter *adapter) 2829 { 2830 struct net_device *netdev = adapter->netdev; 2831 u16 vid = adapter->hw.mng_cookie.vlan_id; 2832 u16 old_vid = adapter->mng_vlan_id; 2833 2834 if (adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) { 2835 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid); 2836 adapter->mng_vlan_id = vid; 2837 } 2838 2839 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && (vid != old_vid)) 2840 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), old_vid); 2841 } 2842 2843 static void e1000_restore_vlan(struct e1000_adapter *adapter) 2844 { 2845 u16 vid; 2846 2847 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0); 2848 2849 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 2850 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid); 2851 } 2852 2853 static void e1000_init_manageability_pt(struct e1000_adapter *adapter) 2854 { 2855 struct e1000_hw *hw = &adapter->hw; 2856 u32 manc, manc2h, mdef, i, j; 2857 2858 if (!(adapter->flags & FLAG_MNG_PT_ENABLED)) 2859 return; 2860 2861 manc = er32(MANC); 2862 2863 /* enable receiving management packets to the host. this will probably 2864 * generate destination unreachable messages from the host OS, but 2865 * the packets will be handled on SMBUS 2866 */ 2867 manc |= E1000_MANC_EN_MNG2HOST; 2868 manc2h = er32(MANC2H); 2869 2870 switch (hw->mac.type) { 2871 default: 2872 manc2h |= (E1000_MANC2H_PORT_623 | E1000_MANC2H_PORT_664); 2873 break; 2874 case e1000_82574: 2875 case e1000_82583: 2876 /* Check if IPMI pass-through decision filter already exists; 2877 * if so, enable it. 2878 */ 2879 for (i = 0, j = 0; i < 8; i++) { 2880 mdef = er32(MDEF(i)); 2881 2882 /* Ignore filters with anything other than IPMI ports */ 2883 if (mdef & ~(E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664)) 2884 continue; 2885 2886 /* Enable this decision filter in MANC2H */ 2887 if (mdef) 2888 manc2h |= BIT(i); 2889 2890 j |= mdef; 2891 } 2892 2893 if (j == (E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664)) 2894 break; 2895 2896 /* Create new decision filter in an empty filter */ 2897 for (i = 0, j = 0; i < 8; i++) 2898 if (er32(MDEF(i)) == 0) { 2899 ew32(MDEF(i), (E1000_MDEF_PORT_623 | 2900 E1000_MDEF_PORT_664)); 2901 manc2h |= BIT(1); 2902 j++; 2903 break; 2904 } 2905 2906 if (!j) 2907 e_warn("Unable to create IPMI pass-through filter\n"); 2908 break; 2909 } 2910 2911 ew32(MANC2H, manc2h); 2912 ew32(MANC, manc); 2913 } 2914 2915 /** 2916 * e1000_configure_tx - Configure Transmit Unit after Reset 2917 * @adapter: board private structure 2918 * 2919 * Configure the Tx unit of the MAC after a reset. 2920 **/ 2921 static void e1000_configure_tx(struct e1000_adapter *adapter) 2922 { 2923 struct e1000_hw *hw = &adapter->hw; 2924 struct e1000_ring *tx_ring = adapter->tx_ring; 2925 u64 tdba; 2926 u32 tdlen, tctl, tarc; 2927 2928 /* Setup the HW Tx Head and Tail descriptor pointers */ 2929 tdba = tx_ring->dma; 2930 tdlen = tx_ring->count * sizeof(struct e1000_tx_desc); 2931 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32))); 2932 ew32(TDBAH(0), (tdba >> 32)); 2933 ew32(TDLEN(0), tdlen); 2934 ew32(TDH(0), 0); 2935 ew32(TDT(0), 0); 2936 tx_ring->head = adapter->hw.hw_addr + E1000_TDH(0); 2937 tx_ring->tail = adapter->hw.hw_addr + E1000_TDT(0); 2938 2939 writel(0, tx_ring->head); 2940 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 2941 e1000e_update_tdt_wa(tx_ring, 0); 2942 else 2943 writel(0, tx_ring->tail); 2944 2945 /* Set the Tx Interrupt Delay register */ 2946 ew32(TIDV, adapter->tx_int_delay); 2947 /* Tx irq moderation */ 2948 ew32(TADV, adapter->tx_abs_int_delay); 2949 2950 if (adapter->flags2 & FLAG2_DMA_BURST) { 2951 u32 txdctl = er32(TXDCTL(0)); 2952 2953 txdctl &= ~(E1000_TXDCTL_PTHRESH | E1000_TXDCTL_HTHRESH | 2954 E1000_TXDCTL_WTHRESH); 2955 /* set up some performance related parameters to encourage the 2956 * hardware to use the bus more efficiently in bursts, depends 2957 * on the tx_int_delay to be enabled, 2958 * wthresh = 1 ==> burst write is disabled to avoid Tx stalls 2959 * hthresh = 1 ==> prefetch when one or more available 2960 * pthresh = 0x1f ==> prefetch if internal cache 31 or less 2961 * BEWARE: this seems to work but should be considered first if 2962 * there are Tx hangs or other Tx related bugs 2963 */ 2964 txdctl |= E1000_TXDCTL_DMA_BURST_ENABLE; 2965 ew32(TXDCTL(0), txdctl); 2966 } 2967 /* erratum work around: set txdctl the same for both queues */ 2968 ew32(TXDCTL(1), er32(TXDCTL(0))); 2969 2970 /* Program the Transmit Control Register */ 2971 tctl = er32(TCTL); 2972 tctl &= ~E1000_TCTL_CT; 2973 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC | 2974 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT); 2975 2976 if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) { 2977 tarc = er32(TARC(0)); 2978 /* set the speed mode bit, we'll clear it if we're not at 2979 * gigabit link later 2980 */ 2981 #define SPEED_MODE_BIT BIT(21) 2982 tarc |= SPEED_MODE_BIT; 2983 ew32(TARC(0), tarc); 2984 } 2985 2986 /* errata: program both queues to unweighted RR */ 2987 if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) { 2988 tarc = er32(TARC(0)); 2989 tarc |= 1; 2990 ew32(TARC(0), tarc); 2991 tarc = er32(TARC(1)); 2992 tarc |= 1; 2993 ew32(TARC(1), tarc); 2994 } 2995 2996 /* Setup Transmit Descriptor Settings for eop descriptor */ 2997 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS; 2998 2999 /* only set IDE if we are delaying interrupts using the timers */ 3000 if (adapter->tx_int_delay) 3001 adapter->txd_cmd |= E1000_TXD_CMD_IDE; 3002 3003 /* enable Report Status bit */ 3004 adapter->txd_cmd |= E1000_TXD_CMD_RS; 3005 3006 ew32(TCTL, tctl); 3007 3008 hw->mac.ops.config_collision_dist(hw); 3009 3010 /* SPT and KBL Si errata workaround to avoid data corruption */ 3011 if (hw->mac.type == e1000_pch_spt) { 3012 u32 reg_val; 3013 3014 reg_val = er32(IOSFPC); 3015 reg_val |= E1000_RCTL_RDMTS_HEX; 3016 ew32(IOSFPC, reg_val); 3017 3018 reg_val = er32(TARC(0)); 3019 /* SPT and KBL Si errata workaround to avoid Tx hang. 3020 * Dropping the number of outstanding requests from 3021 * 3 to 2 in order to avoid a buffer overrun. 3022 */ 3023 reg_val &= ~E1000_TARC0_CB_MULTIQ_3_REQ; 3024 reg_val |= E1000_TARC0_CB_MULTIQ_2_REQ; 3025 ew32(TARC(0), reg_val); 3026 } 3027 } 3028 3029 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \ 3030 (((S) & (PAGE_SIZE - 1)) ? 1 : 0)) 3031 3032 /** 3033 * e1000_setup_rctl - configure the receive control registers 3034 * @adapter: Board private structure 3035 **/ 3036 static void e1000_setup_rctl(struct e1000_adapter *adapter) 3037 { 3038 struct e1000_hw *hw = &adapter->hw; 3039 u32 rctl, rfctl; 3040 u32 pages = 0; 3041 3042 /* Workaround Si errata on PCHx - configure jumbo frame flow. 3043 * If jumbo frames not set, program related MAC/PHY registers 3044 * to h/w defaults 3045 */ 3046 if (hw->mac.type >= e1000_pch2lan) { 3047 s32 ret_val; 3048 3049 if (adapter->netdev->mtu > ETH_DATA_LEN) 3050 ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, true); 3051 else 3052 ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, false); 3053 3054 if (ret_val) 3055 e_dbg("failed to enable|disable jumbo frame workaround mode\n"); 3056 } 3057 3058 /* Program MC offset vector base */ 3059 rctl = er32(RCTL); 3060 rctl &= ~(3 << E1000_RCTL_MO_SHIFT); 3061 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | 3062 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF | 3063 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT); 3064 3065 /* Do not Store bad packets */ 3066 rctl &= ~E1000_RCTL_SBP; 3067 3068 /* Enable Long Packet receive */ 3069 if (adapter->netdev->mtu <= ETH_DATA_LEN) 3070 rctl &= ~E1000_RCTL_LPE; 3071 else 3072 rctl |= E1000_RCTL_LPE; 3073 3074 /* Some systems expect that the CRC is included in SMBUS traffic. The 3075 * hardware strips the CRC before sending to both SMBUS (BMC) and to 3076 * host memory when this is enabled 3077 */ 3078 if (adapter->flags2 & FLAG2_CRC_STRIPPING) 3079 rctl |= E1000_RCTL_SECRC; 3080 3081 /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */ 3082 if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) { 3083 u16 phy_data; 3084 3085 e1e_rphy(hw, PHY_REG(770, 26), &phy_data); 3086 phy_data &= 0xfff8; 3087 phy_data |= BIT(2); 3088 e1e_wphy(hw, PHY_REG(770, 26), phy_data); 3089 3090 e1e_rphy(hw, 22, &phy_data); 3091 phy_data &= 0x0fff; 3092 phy_data |= BIT(14); 3093 e1e_wphy(hw, 0x10, 0x2823); 3094 e1e_wphy(hw, 0x11, 0x0003); 3095 e1e_wphy(hw, 22, phy_data); 3096 } 3097 3098 /* Setup buffer sizes */ 3099 rctl &= ~E1000_RCTL_SZ_4096; 3100 rctl |= E1000_RCTL_BSEX; 3101 switch (adapter->rx_buffer_len) { 3102 case 2048: 3103 default: 3104 rctl |= E1000_RCTL_SZ_2048; 3105 rctl &= ~E1000_RCTL_BSEX; 3106 break; 3107 case 4096: 3108 rctl |= E1000_RCTL_SZ_4096; 3109 break; 3110 case 8192: 3111 rctl |= E1000_RCTL_SZ_8192; 3112 break; 3113 case 16384: 3114 rctl |= E1000_RCTL_SZ_16384; 3115 break; 3116 } 3117 3118 /* Enable Extended Status in all Receive Descriptors */ 3119 rfctl = er32(RFCTL); 3120 rfctl |= E1000_RFCTL_EXTEN; 3121 ew32(RFCTL, rfctl); 3122 3123 /* 82571 and greater support packet-split where the protocol 3124 * header is placed in skb->data and the packet data is 3125 * placed in pages hanging off of skb_shinfo(skb)->nr_frags. 3126 * In the case of a non-split, skb->data is linearly filled, 3127 * followed by the page buffers. Therefore, skb->data is 3128 * sized to hold the largest protocol header. 3129 * 3130 * allocations using alloc_page take too long for regular MTU 3131 * so only enable packet split for jumbo frames 3132 * 3133 * Using pages when the page size is greater than 16k wastes 3134 * a lot of memory, since we allocate 3 pages at all times 3135 * per packet. 3136 */ 3137 pages = PAGE_USE_COUNT(adapter->netdev->mtu); 3138 if ((pages <= 3) && (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE)) 3139 adapter->rx_ps_pages = pages; 3140 else 3141 adapter->rx_ps_pages = 0; 3142 3143 if (adapter->rx_ps_pages) { 3144 u32 psrctl = 0; 3145 3146 /* Enable Packet split descriptors */ 3147 rctl |= E1000_RCTL_DTYP_PS; 3148 3149 psrctl |= adapter->rx_ps_bsize0 >> E1000_PSRCTL_BSIZE0_SHIFT; 3150 3151 switch (adapter->rx_ps_pages) { 3152 case 3: 3153 psrctl |= PAGE_SIZE << E1000_PSRCTL_BSIZE3_SHIFT; 3154 fallthrough; 3155 case 2: 3156 psrctl |= PAGE_SIZE << E1000_PSRCTL_BSIZE2_SHIFT; 3157 fallthrough; 3158 case 1: 3159 psrctl |= PAGE_SIZE >> E1000_PSRCTL_BSIZE1_SHIFT; 3160 break; 3161 } 3162 3163 ew32(PSRCTL, psrctl); 3164 } 3165 3166 /* This is useful for sniffing bad packets. */ 3167 if (adapter->netdev->features & NETIF_F_RXALL) { 3168 /* UPE and MPE will be handled by normal PROMISC logic 3169 * in e1000e_set_rx_mode 3170 */ 3171 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */ 3172 E1000_RCTL_BAM | /* RX All Bcast Pkts */ 3173 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */ 3174 3175 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */ 3176 E1000_RCTL_DPF | /* Allow filtered pause */ 3177 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */ 3178 /* Do not mess with E1000_CTRL_VME, it affects transmit as well, 3179 * and that breaks VLANs. 3180 */ 3181 } 3182 3183 ew32(RCTL, rctl); 3184 /* just started the receive unit, no need to restart */ 3185 adapter->flags &= ~FLAG_RESTART_NOW; 3186 } 3187 3188 /** 3189 * e1000_configure_rx - Configure Receive Unit after Reset 3190 * @adapter: board private structure 3191 * 3192 * Configure the Rx unit of the MAC after a reset. 3193 **/ 3194 static void e1000_configure_rx(struct e1000_adapter *adapter) 3195 { 3196 struct e1000_hw *hw = &adapter->hw; 3197 struct e1000_ring *rx_ring = adapter->rx_ring; 3198 u64 rdba; 3199 u32 rdlen, rctl, rxcsum, ctrl_ext; 3200 3201 if (adapter->rx_ps_pages) { 3202 /* this is a 32 byte descriptor */ 3203 rdlen = rx_ring->count * 3204 sizeof(union e1000_rx_desc_packet_split); 3205 adapter->clean_rx = e1000_clean_rx_irq_ps; 3206 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps; 3207 } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) { 3208 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended); 3209 adapter->clean_rx = e1000_clean_jumbo_rx_irq; 3210 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers; 3211 } else { 3212 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended); 3213 adapter->clean_rx = e1000_clean_rx_irq; 3214 adapter->alloc_rx_buf = e1000_alloc_rx_buffers; 3215 } 3216 3217 /* disable receives while setting up the descriptors */ 3218 rctl = er32(RCTL); 3219 if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX)) 3220 ew32(RCTL, rctl & ~E1000_RCTL_EN); 3221 e1e_flush(); 3222 usleep_range(10000, 11000); 3223 3224 if (adapter->flags2 & FLAG2_DMA_BURST) { 3225 /* set the writeback threshold (only takes effect if the RDTR 3226 * is set). set GRAN=1 and write back up to 0x4 worth, and 3227 * enable prefetching of 0x20 Rx descriptors 3228 * granularity = 01 3229 * wthresh = 04, 3230 * hthresh = 04, 3231 * pthresh = 0x20 3232 */ 3233 ew32(RXDCTL(0), E1000_RXDCTL_DMA_BURST_ENABLE); 3234 ew32(RXDCTL(1), E1000_RXDCTL_DMA_BURST_ENABLE); 3235 } 3236 3237 /* set the Receive Delay Timer Register */ 3238 ew32(RDTR, adapter->rx_int_delay); 3239 3240 /* irq moderation */ 3241 ew32(RADV, adapter->rx_abs_int_delay); 3242 if ((adapter->itr_setting != 0) && (adapter->itr != 0)) 3243 e1000e_write_itr(adapter, adapter->itr); 3244 3245 ctrl_ext = er32(CTRL_EXT); 3246 /* Auto-Mask interrupts upon ICR access */ 3247 ctrl_ext |= E1000_CTRL_EXT_IAME; 3248 ew32(IAM, 0xffffffff); 3249 ew32(CTRL_EXT, ctrl_ext); 3250 e1e_flush(); 3251 3252 /* Setup the HW Rx Head and Tail Descriptor Pointers and 3253 * the Base and Length of the Rx Descriptor Ring 3254 */ 3255 rdba = rx_ring->dma; 3256 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32))); 3257 ew32(RDBAH(0), (rdba >> 32)); 3258 ew32(RDLEN(0), rdlen); 3259 ew32(RDH(0), 0); 3260 ew32(RDT(0), 0); 3261 rx_ring->head = adapter->hw.hw_addr + E1000_RDH(0); 3262 rx_ring->tail = adapter->hw.hw_addr + E1000_RDT(0); 3263 3264 writel(0, rx_ring->head); 3265 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 3266 e1000e_update_rdt_wa(rx_ring, 0); 3267 else 3268 writel(0, rx_ring->tail); 3269 3270 /* Enable Receive Checksum Offload for TCP and UDP */ 3271 rxcsum = er32(RXCSUM); 3272 if (adapter->netdev->features & NETIF_F_RXCSUM) 3273 rxcsum |= E1000_RXCSUM_TUOFL; 3274 else 3275 rxcsum &= ~E1000_RXCSUM_TUOFL; 3276 ew32(RXCSUM, rxcsum); 3277 3278 /* With jumbo frames, excessive C-state transition latencies result 3279 * in dropped transactions. 3280 */ 3281 if (adapter->netdev->mtu > ETH_DATA_LEN) { 3282 u32 lat = 3283 ((er32(PBA) & E1000_PBA_RXA_MASK) * 1024 - 3284 adapter->max_frame_size) * 8 / 1000; 3285 3286 if (adapter->flags & FLAG_IS_ICH) { 3287 u32 rxdctl = er32(RXDCTL(0)); 3288 3289 ew32(RXDCTL(0), rxdctl | 0x3 | BIT(8)); 3290 } 3291 3292 dev_info(&adapter->pdev->dev, 3293 "Some CPU C-states have been disabled in order to enable jumbo frames\n"); 3294 cpu_latency_qos_update_request(&adapter->pm_qos_req, lat); 3295 } else { 3296 cpu_latency_qos_update_request(&adapter->pm_qos_req, 3297 PM_QOS_DEFAULT_VALUE); 3298 } 3299 3300 /* Enable Receives */ 3301 ew32(RCTL, rctl); 3302 } 3303 3304 /** 3305 * e1000e_write_mc_addr_list - write multicast addresses to MTA 3306 * @netdev: network interface device structure 3307 * 3308 * Writes multicast address list to the MTA hash table. 3309 * Returns: -ENOMEM on failure 3310 * 0 on no addresses written 3311 * X on writing X addresses to MTA 3312 */ 3313 static int e1000e_write_mc_addr_list(struct net_device *netdev) 3314 { 3315 struct e1000_adapter *adapter = netdev_priv(netdev); 3316 struct e1000_hw *hw = &adapter->hw; 3317 struct netdev_hw_addr *ha; 3318 u8 *mta_list; 3319 int i; 3320 3321 if (netdev_mc_empty(netdev)) { 3322 /* nothing to program, so clear mc list */ 3323 hw->mac.ops.update_mc_addr_list(hw, NULL, 0); 3324 return 0; 3325 } 3326 3327 mta_list = kcalloc(netdev_mc_count(netdev), ETH_ALEN, GFP_ATOMIC); 3328 if (!mta_list) 3329 return -ENOMEM; 3330 3331 /* update_mc_addr_list expects a packed array of only addresses. */ 3332 i = 0; 3333 netdev_for_each_mc_addr(ha, netdev) 3334 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN); 3335 3336 hw->mac.ops.update_mc_addr_list(hw, mta_list, i); 3337 kfree(mta_list); 3338 3339 return netdev_mc_count(netdev); 3340 } 3341 3342 /** 3343 * e1000e_write_uc_addr_list - write unicast addresses to RAR table 3344 * @netdev: network interface device structure 3345 * 3346 * Writes unicast address list to the RAR table. 3347 * Returns: -ENOMEM on failure/insufficient address space 3348 * 0 on no addresses written 3349 * X on writing X addresses to the RAR table 3350 **/ 3351 static int e1000e_write_uc_addr_list(struct net_device *netdev) 3352 { 3353 struct e1000_adapter *adapter = netdev_priv(netdev); 3354 struct e1000_hw *hw = &adapter->hw; 3355 unsigned int rar_entries; 3356 int count = 0; 3357 3358 rar_entries = hw->mac.ops.rar_get_count(hw); 3359 3360 /* save a rar entry for our hardware address */ 3361 rar_entries--; 3362 3363 /* save a rar entry for the LAA workaround */ 3364 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) 3365 rar_entries--; 3366 3367 /* return ENOMEM indicating insufficient memory for addresses */ 3368 if (netdev_uc_count(netdev) > rar_entries) 3369 return -ENOMEM; 3370 3371 if (!netdev_uc_empty(netdev) && rar_entries) { 3372 struct netdev_hw_addr *ha; 3373 3374 /* write the addresses in reverse order to avoid write 3375 * combining 3376 */ 3377 netdev_for_each_uc_addr(ha, netdev) { 3378 int ret_val; 3379 3380 if (!rar_entries) 3381 break; 3382 ret_val = hw->mac.ops.rar_set(hw, ha->addr, rar_entries--); 3383 if (ret_val < 0) 3384 return -ENOMEM; 3385 count++; 3386 } 3387 } 3388 3389 /* zero out the remaining RAR entries not used above */ 3390 for (; rar_entries > 0; rar_entries--) { 3391 ew32(RAH(rar_entries), 0); 3392 ew32(RAL(rar_entries), 0); 3393 } 3394 e1e_flush(); 3395 3396 return count; 3397 } 3398 3399 /** 3400 * e1000e_set_rx_mode - secondary unicast, Multicast and Promiscuous mode set 3401 * @netdev: network interface device structure 3402 * 3403 * The ndo_set_rx_mode entry point is called whenever the unicast or multicast 3404 * address list or the network interface flags are updated. This routine is 3405 * responsible for configuring the hardware for proper unicast, multicast, 3406 * promiscuous mode, and all-multi behavior. 3407 **/ 3408 static void e1000e_set_rx_mode(struct net_device *netdev) 3409 { 3410 struct e1000_adapter *adapter = netdev_priv(netdev); 3411 struct e1000_hw *hw = &adapter->hw; 3412 u32 rctl; 3413 3414 if (pm_runtime_suspended(netdev->dev.parent)) 3415 return; 3416 3417 /* Check for Promiscuous and All Multicast modes */ 3418 rctl = er32(RCTL); 3419 3420 /* clear the affected bits */ 3421 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE); 3422 3423 if (netdev->flags & IFF_PROMISC) { 3424 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE); 3425 /* Do not hardware filter VLANs in promisc mode */ 3426 e1000e_vlan_filter_disable(adapter); 3427 } else { 3428 int count; 3429 3430 if (netdev->flags & IFF_ALLMULTI) { 3431 rctl |= E1000_RCTL_MPE; 3432 } else { 3433 /* Write addresses to the MTA, if the attempt fails 3434 * then we should just turn on promiscuous mode so 3435 * that we can at least receive multicast traffic 3436 */ 3437 count = e1000e_write_mc_addr_list(netdev); 3438 if (count < 0) 3439 rctl |= E1000_RCTL_MPE; 3440 } 3441 e1000e_vlan_filter_enable(adapter); 3442 /* Write addresses to available RAR registers, if there is not 3443 * sufficient space to store all the addresses then enable 3444 * unicast promiscuous mode 3445 */ 3446 count = e1000e_write_uc_addr_list(netdev); 3447 if (count < 0) 3448 rctl |= E1000_RCTL_UPE; 3449 } 3450 3451 ew32(RCTL, rctl); 3452 3453 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) 3454 e1000e_vlan_strip_enable(adapter); 3455 else 3456 e1000e_vlan_strip_disable(adapter); 3457 } 3458 3459 static void e1000e_setup_rss_hash(struct e1000_adapter *adapter) 3460 { 3461 struct e1000_hw *hw = &adapter->hw; 3462 u32 mrqc, rxcsum; 3463 u32 rss_key[10]; 3464 int i; 3465 3466 netdev_rss_key_fill(rss_key, sizeof(rss_key)); 3467 for (i = 0; i < 10; i++) 3468 ew32(RSSRK(i), rss_key[i]); 3469 3470 /* Direct all traffic to queue 0 */ 3471 for (i = 0; i < 32; i++) 3472 ew32(RETA(i), 0); 3473 3474 /* Disable raw packet checksumming so that RSS hash is placed in 3475 * descriptor on writeback. 3476 */ 3477 rxcsum = er32(RXCSUM); 3478 rxcsum |= E1000_RXCSUM_PCSD; 3479 3480 ew32(RXCSUM, rxcsum); 3481 3482 mrqc = (E1000_MRQC_RSS_FIELD_IPV4 | 3483 E1000_MRQC_RSS_FIELD_IPV4_TCP | 3484 E1000_MRQC_RSS_FIELD_IPV6 | 3485 E1000_MRQC_RSS_FIELD_IPV6_TCP | 3486 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX); 3487 3488 ew32(MRQC, mrqc); 3489 } 3490 3491 /** 3492 * e1000e_get_base_timinca - get default SYSTIM time increment attributes 3493 * @adapter: board private structure 3494 * @timinca: pointer to returned time increment attributes 3495 * 3496 * Get attributes for incrementing the System Time Register SYSTIML/H at 3497 * the default base frequency, and set the cyclecounter shift value. 3498 **/ 3499 s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca) 3500 { 3501 struct e1000_hw *hw = &adapter->hw; 3502 u32 incvalue, incperiod, shift; 3503 3504 /* Make sure clock is enabled on I217/I218/I219 before checking 3505 * the frequency 3506 */ 3507 if ((hw->mac.type >= e1000_pch_lpt) && 3508 !(er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) && 3509 !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_ENABLED)) { 3510 u32 fextnvm7 = er32(FEXTNVM7); 3511 3512 if (!(fextnvm7 & BIT(0))) { 3513 ew32(FEXTNVM7, fextnvm7 | BIT(0)); 3514 e1e_flush(); 3515 } 3516 } 3517 3518 switch (hw->mac.type) { 3519 case e1000_pch2lan: 3520 /* Stable 96MHz frequency */ 3521 incperiod = INCPERIOD_96MHZ; 3522 incvalue = INCVALUE_96MHZ; 3523 shift = INCVALUE_SHIFT_96MHZ; 3524 adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHZ; 3525 break; 3526 case e1000_pch_lpt: 3527 if (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI) { 3528 /* Stable 96MHz frequency */ 3529 incperiod = INCPERIOD_96MHZ; 3530 incvalue = INCVALUE_96MHZ; 3531 shift = INCVALUE_SHIFT_96MHZ; 3532 adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHZ; 3533 } else { 3534 /* Stable 25MHz frequency */ 3535 incperiod = INCPERIOD_25MHZ; 3536 incvalue = INCVALUE_25MHZ; 3537 shift = INCVALUE_SHIFT_25MHZ; 3538 adapter->cc.shift = shift; 3539 } 3540 break; 3541 case e1000_pch_spt: 3542 /* Stable 24MHz frequency */ 3543 incperiod = INCPERIOD_24MHZ; 3544 incvalue = INCVALUE_24MHZ; 3545 shift = INCVALUE_SHIFT_24MHZ; 3546 adapter->cc.shift = shift; 3547 break; 3548 case e1000_pch_cnp: 3549 case e1000_pch_tgp: 3550 case e1000_pch_adp: 3551 case e1000_pch_mtp: 3552 if (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI) { 3553 /* Stable 24MHz frequency */ 3554 incperiod = INCPERIOD_24MHZ; 3555 incvalue = INCVALUE_24MHZ; 3556 shift = INCVALUE_SHIFT_24MHZ; 3557 adapter->cc.shift = shift; 3558 } else { 3559 /* Stable 38400KHz frequency */ 3560 incperiod = INCPERIOD_38400KHZ; 3561 incvalue = INCVALUE_38400KHZ; 3562 shift = INCVALUE_SHIFT_38400KHZ; 3563 adapter->cc.shift = shift; 3564 } 3565 break; 3566 case e1000_82574: 3567 case e1000_82583: 3568 /* Stable 25MHz frequency */ 3569 incperiod = INCPERIOD_25MHZ; 3570 incvalue = INCVALUE_25MHZ; 3571 shift = INCVALUE_SHIFT_25MHZ; 3572 adapter->cc.shift = shift; 3573 break; 3574 default: 3575 return -EINVAL; 3576 } 3577 3578 *timinca = ((incperiod << E1000_TIMINCA_INCPERIOD_SHIFT) | 3579 ((incvalue << shift) & E1000_TIMINCA_INCVALUE_MASK)); 3580 3581 return 0; 3582 } 3583 3584 /** 3585 * e1000e_config_hwtstamp - configure the hwtstamp registers and enable/disable 3586 * @adapter: board private structure 3587 * @config: timestamp configuration 3588 * 3589 * Outgoing time stamping can be enabled and disabled. Play nice and 3590 * disable it when requested, although it shouldn't cause any overhead 3591 * when no packet needs it. At most one packet in the queue may be 3592 * marked for time stamping, otherwise it would be impossible to tell 3593 * for sure to which packet the hardware time stamp belongs. 3594 * 3595 * Incoming time stamping has to be configured via the hardware filters. 3596 * Not all combinations are supported, in particular event type has to be 3597 * specified. Matching the kind of event packet is not supported, with the 3598 * exception of "all V2 events regardless of level 2 or 4". 3599 **/ 3600 static int e1000e_config_hwtstamp(struct e1000_adapter *adapter, 3601 struct hwtstamp_config *config) 3602 { 3603 struct e1000_hw *hw = &adapter->hw; 3604 u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED; 3605 u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED; 3606 u32 rxmtrl = 0; 3607 u16 rxudp = 0; 3608 bool is_l4 = false; 3609 bool is_l2 = false; 3610 u32 regval; 3611 3612 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP)) 3613 return -EINVAL; 3614 3615 /* flags reserved for future extensions - must be zero */ 3616 if (config->flags) 3617 return -EINVAL; 3618 3619 switch (config->tx_type) { 3620 case HWTSTAMP_TX_OFF: 3621 tsync_tx_ctl = 0; 3622 break; 3623 case HWTSTAMP_TX_ON: 3624 break; 3625 default: 3626 return -ERANGE; 3627 } 3628 3629 switch (config->rx_filter) { 3630 case HWTSTAMP_FILTER_NONE: 3631 tsync_rx_ctl = 0; 3632 break; 3633 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: 3634 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1; 3635 rxmtrl = E1000_RXMTRL_PTP_V1_SYNC_MESSAGE; 3636 is_l4 = true; 3637 break; 3638 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: 3639 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1; 3640 rxmtrl = E1000_RXMTRL_PTP_V1_DELAY_REQ_MESSAGE; 3641 is_l4 = true; 3642 break; 3643 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 3644 /* Also time stamps V2 L2 Path Delay Request/Response */ 3645 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2; 3646 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE; 3647 is_l2 = true; 3648 break; 3649 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 3650 /* Also time stamps V2 L2 Path Delay Request/Response. */ 3651 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2; 3652 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE; 3653 is_l2 = true; 3654 break; 3655 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 3656 /* Hardware cannot filter just V2 L4 Sync messages */ 3657 fallthrough; 3658 case HWTSTAMP_FILTER_PTP_V2_SYNC: 3659 /* Also time stamps V2 Path Delay Request/Response. */ 3660 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2; 3661 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE; 3662 is_l2 = true; 3663 is_l4 = true; 3664 break; 3665 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 3666 /* Hardware cannot filter just V2 L4 Delay Request messages */ 3667 fallthrough; 3668 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 3669 /* Also time stamps V2 Path Delay Request/Response. */ 3670 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2; 3671 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE; 3672 is_l2 = true; 3673 is_l4 = true; 3674 break; 3675 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 3676 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: 3677 /* Hardware cannot filter just V2 L4 or L2 Event messages */ 3678 fallthrough; 3679 case HWTSTAMP_FILTER_PTP_V2_EVENT: 3680 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2; 3681 config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; 3682 is_l2 = true; 3683 is_l4 = true; 3684 break; 3685 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: 3686 /* For V1, the hardware can only filter Sync messages or 3687 * Delay Request messages but not both so fall-through to 3688 * time stamp all packets. 3689 */ 3690 fallthrough; 3691 case HWTSTAMP_FILTER_NTP_ALL: 3692 case HWTSTAMP_FILTER_ALL: 3693 is_l2 = true; 3694 is_l4 = true; 3695 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL; 3696 config->rx_filter = HWTSTAMP_FILTER_ALL; 3697 break; 3698 default: 3699 return -ERANGE; 3700 } 3701 3702 adapter->hwtstamp_config = *config; 3703 3704 /* enable/disable Tx h/w time stamping */ 3705 regval = er32(TSYNCTXCTL); 3706 regval &= ~E1000_TSYNCTXCTL_ENABLED; 3707 regval |= tsync_tx_ctl; 3708 ew32(TSYNCTXCTL, regval); 3709 if ((er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) != 3710 (regval & E1000_TSYNCTXCTL_ENABLED)) { 3711 e_err("Timesync Tx Control register not set as expected\n"); 3712 return -EAGAIN; 3713 } 3714 3715 /* enable/disable Rx h/w time stamping */ 3716 regval = er32(TSYNCRXCTL); 3717 regval &= ~(E1000_TSYNCRXCTL_ENABLED | E1000_TSYNCRXCTL_TYPE_MASK); 3718 regval |= tsync_rx_ctl; 3719 ew32(TSYNCRXCTL, regval); 3720 if ((er32(TSYNCRXCTL) & (E1000_TSYNCRXCTL_ENABLED | 3721 E1000_TSYNCRXCTL_TYPE_MASK)) != 3722 (regval & (E1000_TSYNCRXCTL_ENABLED | 3723 E1000_TSYNCRXCTL_TYPE_MASK))) { 3724 e_err("Timesync Rx Control register not set as expected\n"); 3725 return -EAGAIN; 3726 } 3727 3728 /* L2: define ethertype filter for time stamped packets */ 3729 if (is_l2) 3730 rxmtrl |= ETH_P_1588; 3731 3732 /* define which PTP packets get time stamped */ 3733 ew32(RXMTRL, rxmtrl); 3734 3735 /* Filter by destination port */ 3736 if (is_l4) { 3737 rxudp = PTP_EV_PORT; 3738 cpu_to_be16s(&rxudp); 3739 } 3740 ew32(RXUDP, rxudp); 3741 3742 e1e_flush(); 3743 3744 /* Clear TSYNCRXCTL_VALID & TSYNCTXCTL_VALID bit */ 3745 er32(RXSTMPH); 3746 er32(TXSTMPH); 3747 3748 return 0; 3749 } 3750 3751 /** 3752 * e1000_configure - configure the hardware for Rx and Tx 3753 * @adapter: private board structure 3754 **/ 3755 static void e1000_configure(struct e1000_adapter *adapter) 3756 { 3757 struct e1000_ring *rx_ring = adapter->rx_ring; 3758 3759 e1000e_set_rx_mode(adapter->netdev); 3760 3761 e1000_restore_vlan(adapter); 3762 e1000_init_manageability_pt(adapter); 3763 3764 e1000_configure_tx(adapter); 3765 3766 if (adapter->netdev->features & NETIF_F_RXHASH) 3767 e1000e_setup_rss_hash(adapter); 3768 e1000_setup_rctl(adapter); 3769 e1000_configure_rx(adapter); 3770 adapter->alloc_rx_buf(rx_ring, e1000_desc_unused(rx_ring), GFP_KERNEL); 3771 } 3772 3773 /** 3774 * e1000e_power_up_phy - restore link in case the phy was powered down 3775 * @adapter: address of board private structure 3776 * 3777 * The phy may be powered down to save power and turn off link when the 3778 * driver is unloaded and wake on lan is not enabled (among others) 3779 * *** this routine MUST be followed by a call to e1000e_reset *** 3780 **/ 3781 void e1000e_power_up_phy(struct e1000_adapter *adapter) 3782 { 3783 if (adapter->hw.phy.ops.power_up) 3784 adapter->hw.phy.ops.power_up(&adapter->hw); 3785 3786 adapter->hw.mac.ops.setup_link(&adapter->hw); 3787 } 3788 3789 /** 3790 * e1000_power_down_phy - Power down the PHY 3791 * @adapter: board private structure 3792 * 3793 * Power down the PHY so no link is implied when interface is down. 3794 * The PHY cannot be powered down if management or WoL is active. 3795 */ 3796 static void e1000_power_down_phy(struct e1000_adapter *adapter) 3797 { 3798 if (adapter->hw.phy.ops.power_down) 3799 adapter->hw.phy.ops.power_down(&adapter->hw); 3800 } 3801 3802 /** 3803 * e1000_flush_tx_ring - remove all descriptors from the tx_ring 3804 * @adapter: board private structure 3805 * 3806 * We want to clear all pending descriptors from the TX ring. 3807 * zeroing happens when the HW reads the regs. We assign the ring itself as 3808 * the data of the next descriptor. We don't care about the data we are about 3809 * to reset the HW. 3810 */ 3811 static void e1000_flush_tx_ring(struct e1000_adapter *adapter) 3812 { 3813 struct e1000_hw *hw = &adapter->hw; 3814 struct e1000_ring *tx_ring = adapter->tx_ring; 3815 struct e1000_tx_desc *tx_desc = NULL; 3816 u32 tdt, tctl, txd_lower = E1000_TXD_CMD_IFCS; 3817 u16 size = 512; 3818 3819 tctl = er32(TCTL); 3820 ew32(TCTL, tctl | E1000_TCTL_EN); 3821 tdt = er32(TDT(0)); 3822 BUG_ON(tdt != tx_ring->next_to_use); 3823 tx_desc = E1000_TX_DESC(*tx_ring, tx_ring->next_to_use); 3824 tx_desc->buffer_addr = cpu_to_le64(tx_ring->dma); 3825 3826 tx_desc->lower.data = cpu_to_le32(txd_lower | size); 3827 tx_desc->upper.data = 0; 3828 /* flush descriptors to memory before notifying the HW */ 3829 wmb(); 3830 tx_ring->next_to_use++; 3831 if (tx_ring->next_to_use == tx_ring->count) 3832 tx_ring->next_to_use = 0; 3833 ew32(TDT(0), tx_ring->next_to_use); 3834 usleep_range(200, 250); 3835 } 3836 3837 /** 3838 * e1000_flush_rx_ring - remove all descriptors from the rx_ring 3839 * @adapter: board private structure 3840 * 3841 * Mark all descriptors in the RX ring as consumed and disable the rx ring 3842 */ 3843 static void e1000_flush_rx_ring(struct e1000_adapter *adapter) 3844 { 3845 u32 rctl, rxdctl; 3846 struct e1000_hw *hw = &adapter->hw; 3847 3848 rctl = er32(RCTL); 3849 ew32(RCTL, rctl & ~E1000_RCTL_EN); 3850 e1e_flush(); 3851 usleep_range(100, 150); 3852 3853 rxdctl = er32(RXDCTL(0)); 3854 /* zero the lower 14 bits (prefetch and host thresholds) */ 3855 rxdctl &= 0xffffc000; 3856 3857 /* update thresholds: prefetch threshold to 31, host threshold to 1 3858 * and make sure the granularity is "descriptors" and not "cache lines" 3859 */ 3860 rxdctl |= (0x1F | BIT(8) | E1000_RXDCTL_THRESH_UNIT_DESC); 3861 3862 ew32(RXDCTL(0), rxdctl); 3863 /* momentarily enable the RX ring for the changes to take effect */ 3864 ew32(RCTL, rctl | E1000_RCTL_EN); 3865 e1e_flush(); 3866 usleep_range(100, 150); 3867 ew32(RCTL, rctl & ~E1000_RCTL_EN); 3868 } 3869 3870 /** 3871 * e1000_flush_desc_rings - remove all descriptors from the descriptor rings 3872 * @adapter: board private structure 3873 * 3874 * In i219, the descriptor rings must be emptied before resetting the HW 3875 * or before changing the device state to D3 during runtime (runtime PM). 3876 * 3877 * Failure to do this will cause the HW to enter a unit hang state which can 3878 * only be released by PCI reset on the device 3879 * 3880 */ 3881 3882 static void e1000_flush_desc_rings(struct e1000_adapter *adapter) 3883 { 3884 u16 hang_state; 3885 u32 fext_nvm11, tdlen; 3886 struct e1000_hw *hw = &adapter->hw; 3887 3888 /* First, disable MULR fix in FEXTNVM11 */ 3889 fext_nvm11 = er32(FEXTNVM11); 3890 fext_nvm11 |= E1000_FEXTNVM11_DISABLE_MULR_FIX; 3891 ew32(FEXTNVM11, fext_nvm11); 3892 /* do nothing if we're not in faulty state, or if the queue is empty */ 3893 tdlen = er32(TDLEN(0)); 3894 pci_read_config_word(adapter->pdev, PCICFG_DESC_RING_STATUS, 3895 &hang_state); 3896 if (!(hang_state & FLUSH_DESC_REQUIRED) || !tdlen) 3897 return; 3898 e1000_flush_tx_ring(adapter); 3899 /* recheck, maybe the fault is caused by the rx ring */ 3900 pci_read_config_word(adapter->pdev, PCICFG_DESC_RING_STATUS, 3901 &hang_state); 3902 if (hang_state & FLUSH_DESC_REQUIRED) 3903 e1000_flush_rx_ring(adapter); 3904 } 3905 3906 /** 3907 * e1000e_systim_reset - reset the timesync registers after a hardware reset 3908 * @adapter: board private structure 3909 * 3910 * When the MAC is reset, all hardware bits for timesync will be reset to the 3911 * default values. This function will restore the settings last in place. 3912 * Since the clock SYSTIME registers are reset, we will simply restore the 3913 * cyclecounter to the kernel real clock time. 3914 **/ 3915 static void e1000e_systim_reset(struct e1000_adapter *adapter) 3916 { 3917 struct ptp_clock_info *info = &adapter->ptp_clock_info; 3918 struct e1000_hw *hw = &adapter->hw; 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->adjfreq) { 3927 /* restore the previous ptp frequency delta */ 3928 ret_val = info->adjfreq(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 e1000e_config_hwtstamp(adapter, &adapter->hwtstamp_config); 3951 } 3952 3953 /** 3954 * e1000e_reset - bring the hardware into a known good state 3955 * @adapter: board private structure 3956 * 3957 * This function boots the hardware and enables some settings that 3958 * require a configuration cycle of the hardware - those cannot be 3959 * set/changed during runtime. After reset the device needs to be 3960 * properly configured for Rx, Tx etc. 3961 */ 3962 void e1000e_reset(struct e1000_adapter *adapter) 3963 { 3964 struct e1000_mac_info *mac = &adapter->hw.mac; 3965 struct e1000_fc_info *fc = &adapter->hw.fc; 3966 struct e1000_hw *hw = &adapter->hw; 3967 u32 tx_space, min_tx_space, min_rx_space; 3968 u32 pba = adapter->pba; 3969 u16 hwm; 3970 3971 /* reset Packet Buffer Allocation to default */ 3972 ew32(PBA, pba); 3973 3974 if (adapter->max_frame_size > (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)) { 3975 /* To maintain wire speed transmits, the Tx FIFO should be 3976 * large enough to accommodate two full transmit packets, 3977 * rounded up to the next 1KB and expressed in KB. Likewise, 3978 * the Rx FIFO should be large enough to accommodate at least 3979 * one full receive packet and is similarly rounded up and 3980 * expressed in KB. 3981 */ 3982 pba = er32(PBA); 3983 /* upper 16 bits has Tx packet buffer allocation size in KB */ 3984 tx_space = pba >> 16; 3985 /* lower 16 bits has Rx packet buffer allocation size in KB */ 3986 pba &= 0xffff; 3987 /* the Tx fifo also stores 16 bytes of information about the Tx 3988 * but don't include ethernet FCS because hardware appends it 3989 */ 3990 min_tx_space = (adapter->max_frame_size + 3991 sizeof(struct e1000_tx_desc) - ETH_FCS_LEN) * 2; 3992 min_tx_space = ALIGN(min_tx_space, 1024); 3993 min_tx_space >>= 10; 3994 /* software strips receive CRC, so leave room for it */ 3995 min_rx_space = adapter->max_frame_size; 3996 min_rx_space = ALIGN(min_rx_space, 1024); 3997 min_rx_space >>= 10; 3998 3999 /* If current Tx allocation is less than the min Tx FIFO size, 4000 * and the min Tx FIFO size is less than the current Rx FIFO 4001 * allocation, take space away from current Rx allocation 4002 */ 4003 if ((tx_space < min_tx_space) && 4004 ((min_tx_space - tx_space) < pba)) { 4005 pba -= min_tx_space - tx_space; 4006 4007 /* if short on Rx space, Rx wins and must trump Tx 4008 * adjustment 4009 */ 4010 if (pba < min_rx_space) 4011 pba = min_rx_space; 4012 } 4013 4014 ew32(PBA, pba); 4015 } 4016 4017 /* flow control settings 4018 * 4019 * The high water mark must be low enough to fit one full frame 4020 * (or the size used for early receive) above it in the Rx FIFO. 4021 * Set it to the lower of: 4022 * - 90% of the Rx FIFO size, and 4023 * - the full Rx FIFO size minus one full frame 4024 */ 4025 if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME) 4026 fc->pause_time = 0xFFFF; 4027 else 4028 fc->pause_time = E1000_FC_PAUSE_TIME; 4029 fc->send_xon = true; 4030 fc->current_mode = fc->requested_mode; 4031 4032 switch (hw->mac.type) { 4033 case e1000_ich9lan: 4034 case e1000_ich10lan: 4035 if (adapter->netdev->mtu > ETH_DATA_LEN) { 4036 pba = 14; 4037 ew32(PBA, pba); 4038 fc->high_water = 0x2800; 4039 fc->low_water = fc->high_water - 8; 4040 break; 4041 } 4042 fallthrough; 4043 default: 4044 hwm = min(((pba << 10) * 9 / 10), 4045 ((pba << 10) - adapter->max_frame_size)); 4046 4047 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */ 4048 fc->low_water = fc->high_water - 8; 4049 break; 4050 case e1000_pchlan: 4051 /* Workaround PCH LOM adapter hangs with certain network 4052 * loads. If hangs persist, try disabling Tx flow control. 4053 */ 4054 if (adapter->netdev->mtu > ETH_DATA_LEN) { 4055 fc->high_water = 0x3500; 4056 fc->low_water = 0x1500; 4057 } else { 4058 fc->high_water = 0x5000; 4059 fc->low_water = 0x3000; 4060 } 4061 fc->refresh_time = 0x1000; 4062 break; 4063 case e1000_pch2lan: 4064 case e1000_pch_lpt: 4065 case e1000_pch_spt: 4066 case e1000_pch_cnp: 4067 case e1000_pch_tgp: 4068 case e1000_pch_adp: 4069 case e1000_pch_mtp: 4070 fc->refresh_time = 0xFFFF; 4071 fc->pause_time = 0xFFFF; 4072 4073 if (adapter->netdev->mtu <= ETH_DATA_LEN) { 4074 fc->high_water = 0x05C20; 4075 fc->low_water = 0x05048; 4076 break; 4077 } 4078 4079 pba = 14; 4080 ew32(PBA, pba); 4081 fc->high_water = ((pba << 10) * 9 / 10) & E1000_FCRTH_RTH; 4082 fc->low_water = ((pba << 10) * 8 / 10) & E1000_FCRTL_RTL; 4083 break; 4084 } 4085 4086 /* Alignment of Tx data is on an arbitrary byte boundary with the 4087 * maximum size per Tx descriptor limited only to the transmit 4088 * allocation of the packet buffer minus 96 bytes with an upper 4089 * limit of 24KB due to receive synchronization limitations. 4090 */ 4091 adapter->tx_fifo_limit = min_t(u32, ((er32(PBA) >> 16) << 10) - 96, 4092 24 << 10); 4093 4094 /* Disable Adaptive Interrupt Moderation if 2 full packets cannot 4095 * fit in receive buffer. 4096 */ 4097 if (adapter->itr_setting & 0x3) { 4098 if ((adapter->max_frame_size * 2) > (pba << 10)) { 4099 if (!(adapter->flags2 & FLAG2_DISABLE_AIM)) { 4100 dev_info(&adapter->pdev->dev, 4101 "Interrupt Throttle Rate off\n"); 4102 adapter->flags2 |= FLAG2_DISABLE_AIM; 4103 e1000e_write_itr(adapter, 0); 4104 } 4105 } else if (adapter->flags2 & FLAG2_DISABLE_AIM) { 4106 dev_info(&adapter->pdev->dev, 4107 "Interrupt Throttle Rate on\n"); 4108 adapter->flags2 &= ~FLAG2_DISABLE_AIM; 4109 adapter->itr = 20000; 4110 e1000e_write_itr(adapter, adapter->itr); 4111 } 4112 } 4113 4114 if (hw->mac.type >= e1000_pch_spt) 4115 e1000_flush_desc_rings(adapter); 4116 /* Allow time for pending master requests to run */ 4117 mac->ops.reset_hw(hw); 4118 4119 /* For parts with AMT enabled, let the firmware know 4120 * that the network interface is in control 4121 */ 4122 if (adapter->flags & FLAG_HAS_AMT) 4123 e1000e_get_hw_control(adapter); 4124 4125 ew32(WUC, 0); 4126 4127 if (mac->ops.init_hw(hw)) 4128 e_err("Hardware Error\n"); 4129 4130 e1000_update_mng_vlan(adapter); 4131 4132 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ 4133 ew32(VET, ETH_P_8021Q); 4134 4135 e1000e_reset_adaptive(hw); 4136 4137 /* restore systim and hwtstamp settings */ 4138 e1000e_systim_reset(adapter); 4139 4140 /* Set EEE advertisement as appropriate */ 4141 if (adapter->flags2 & FLAG2_HAS_EEE) { 4142 s32 ret_val; 4143 u16 adv_addr; 4144 4145 switch (hw->phy.type) { 4146 case e1000_phy_82579: 4147 adv_addr = I82579_EEE_ADVERTISEMENT; 4148 break; 4149 case e1000_phy_i217: 4150 adv_addr = I217_EEE_ADVERTISEMENT; 4151 break; 4152 default: 4153 dev_err(&adapter->pdev->dev, 4154 "Invalid PHY type setting EEE advertisement\n"); 4155 return; 4156 } 4157 4158 ret_val = hw->phy.ops.acquire(hw); 4159 if (ret_val) { 4160 dev_err(&adapter->pdev->dev, 4161 "EEE advertisement - unable to acquire PHY\n"); 4162 return; 4163 } 4164 4165 e1000_write_emi_reg_locked(hw, adv_addr, 4166 hw->dev_spec.ich8lan.eee_disable ? 4167 0 : adapter->eee_advert); 4168 4169 hw->phy.ops.release(hw); 4170 } 4171 4172 if (!netif_running(adapter->netdev) && 4173 !test_bit(__E1000_TESTING, &adapter->state)) 4174 e1000_power_down_phy(adapter); 4175 4176 e1000_get_phy_info(hw); 4177 4178 if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) && 4179 !(adapter->flags & FLAG_SMART_POWER_DOWN)) { 4180 u16 phy_data = 0; 4181 /* speed up time to link by disabling smart power down, ignore 4182 * the return value of this function because there is nothing 4183 * different we would do if it failed 4184 */ 4185 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data); 4186 phy_data &= ~IGP02E1000_PM_SPD; 4187 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data); 4188 } 4189 if (hw->mac.type >= e1000_pch_spt && adapter->int_mode == 0) { 4190 u32 reg; 4191 4192 /* Fextnvm7 @ 0xe4[2] = 1 */ 4193 reg = er32(FEXTNVM7); 4194 reg |= E1000_FEXTNVM7_SIDE_CLK_UNGATE; 4195 ew32(FEXTNVM7, reg); 4196 /* Fextnvm9 @ 0x5bb4[13:12] = 11 */ 4197 reg = er32(FEXTNVM9); 4198 reg |= E1000_FEXTNVM9_IOSFSB_CLKGATE_DIS | 4199 E1000_FEXTNVM9_IOSFSB_CLKREQ_DIS; 4200 ew32(FEXTNVM9, reg); 4201 } 4202 4203 } 4204 4205 /** 4206 * e1000e_trigger_lsc - trigger an LSC interrupt 4207 * @adapter: 4208 * 4209 * Fire a link status change interrupt to start the watchdog. 4210 **/ 4211 static void e1000e_trigger_lsc(struct e1000_adapter *adapter) 4212 { 4213 struct e1000_hw *hw = &adapter->hw; 4214 4215 if (adapter->msix_entries) 4216 ew32(ICS, E1000_ICS_LSC | E1000_ICS_OTHER); 4217 else 4218 ew32(ICS, E1000_ICS_LSC); 4219 } 4220 4221 void e1000e_up(struct e1000_adapter *adapter) 4222 { 4223 /* hardware has been reset, we need to reload some things */ 4224 e1000_configure(adapter); 4225 4226 clear_bit(__E1000_DOWN, &adapter->state); 4227 4228 if (adapter->msix_entries) 4229 e1000_configure_msix(adapter); 4230 e1000_irq_enable(adapter); 4231 4232 /* Tx queue started by watchdog timer when link is up */ 4233 4234 e1000e_trigger_lsc(adapter); 4235 } 4236 4237 static void e1000e_flush_descriptors(struct e1000_adapter *adapter) 4238 { 4239 struct e1000_hw *hw = &adapter->hw; 4240 4241 if (!(adapter->flags2 & FLAG2_DMA_BURST)) 4242 return; 4243 4244 /* flush pending descriptor writebacks to memory */ 4245 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 4246 ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD); 4247 4248 /* execute the writes immediately */ 4249 e1e_flush(); 4250 4251 /* due to rare timing issues, write to TIDV/RDTR again to ensure the 4252 * write is successful 4253 */ 4254 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 4255 ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD); 4256 4257 /* execute the writes immediately */ 4258 e1e_flush(); 4259 } 4260 4261 static void e1000e_update_stats(struct e1000_adapter *adapter); 4262 4263 /** 4264 * e1000e_down - quiesce the device and optionally reset the hardware 4265 * @adapter: board private structure 4266 * @reset: boolean flag to reset the hardware or not 4267 */ 4268 void e1000e_down(struct e1000_adapter *adapter, bool reset) 4269 { 4270 struct net_device *netdev = adapter->netdev; 4271 struct e1000_hw *hw = &adapter->hw; 4272 u32 tctl, rctl; 4273 4274 /* signal that we're down so the interrupt handler does not 4275 * reschedule our watchdog timer 4276 */ 4277 set_bit(__E1000_DOWN, &adapter->state); 4278 4279 netif_carrier_off(netdev); 4280 4281 /* disable receives in the hardware */ 4282 rctl = er32(RCTL); 4283 if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX)) 4284 ew32(RCTL, rctl & ~E1000_RCTL_EN); 4285 /* flush and sleep below */ 4286 4287 netif_stop_queue(netdev); 4288 4289 /* disable transmits in the hardware */ 4290 tctl = er32(TCTL); 4291 tctl &= ~E1000_TCTL_EN; 4292 ew32(TCTL, tctl); 4293 4294 /* flush both disables and wait for them to finish */ 4295 e1e_flush(); 4296 usleep_range(10000, 11000); 4297 4298 e1000_irq_disable(adapter); 4299 4300 napi_synchronize(&adapter->napi); 4301 4302 del_timer_sync(&adapter->watchdog_timer); 4303 del_timer_sync(&adapter->phy_info_timer); 4304 4305 spin_lock(&adapter->stats64_lock); 4306 e1000e_update_stats(adapter); 4307 spin_unlock(&adapter->stats64_lock); 4308 4309 e1000e_flush_descriptors(adapter); 4310 4311 adapter->link_speed = 0; 4312 adapter->link_duplex = 0; 4313 4314 /* Disable Si errata workaround on PCHx for jumbo frame flow */ 4315 if ((hw->mac.type >= e1000_pch2lan) && 4316 (adapter->netdev->mtu > ETH_DATA_LEN) && 4317 e1000_lv_jumbo_workaround_ich8lan(hw, false)) 4318 e_dbg("failed to disable jumbo frame workaround mode\n"); 4319 4320 if (!pci_channel_offline(adapter->pdev)) { 4321 if (reset) 4322 e1000e_reset(adapter); 4323 else if (hw->mac.type >= e1000_pch_spt) 4324 e1000_flush_desc_rings(adapter); 4325 } 4326 e1000_clean_tx_ring(adapter->tx_ring); 4327 e1000_clean_rx_ring(adapter->rx_ring); 4328 } 4329 4330 void e1000e_reinit_locked(struct e1000_adapter *adapter) 4331 { 4332 might_sleep(); 4333 while (test_and_set_bit(__E1000_RESETTING, &adapter->state)) 4334 usleep_range(1000, 1100); 4335 e1000e_down(adapter, true); 4336 e1000e_up(adapter); 4337 clear_bit(__E1000_RESETTING, &adapter->state); 4338 } 4339 4340 /** 4341 * e1000e_sanitize_systim - sanitize raw cycle counter reads 4342 * @hw: pointer to the HW structure 4343 * @systim: PHC time value read, sanitized and returned 4344 * @sts: structure to hold system time before and after reading SYSTIML, 4345 * may be NULL 4346 * 4347 * Errata for 82574/82583 possible bad bits read from SYSTIMH/L: 4348 * check to see that the time is incrementing at a reasonable 4349 * rate and is a multiple of incvalue. 4350 **/ 4351 static u64 e1000e_sanitize_systim(struct e1000_hw *hw, u64 systim, 4352 struct ptp_system_timestamp *sts) 4353 { 4354 u64 time_delta, rem, temp; 4355 u64 systim_next; 4356 u32 incvalue; 4357 int i; 4358 4359 incvalue = er32(TIMINCA) & E1000_TIMINCA_INCVALUE_MASK; 4360 for (i = 0; i < E1000_MAX_82574_SYSTIM_REREADS; i++) { 4361 /* latch SYSTIMH on read of SYSTIML */ 4362 ptp_read_system_prets(sts); 4363 systim_next = (u64)er32(SYSTIML); 4364 ptp_read_system_postts(sts); 4365 systim_next |= (u64)er32(SYSTIMH) << 32; 4366 4367 time_delta = systim_next - systim; 4368 temp = time_delta; 4369 /* VMWare users have seen incvalue of zero, don't div / 0 */ 4370 rem = incvalue ? do_div(temp, incvalue) : (time_delta != 0); 4371 4372 systim = systim_next; 4373 4374 if ((time_delta < E1000_82574_SYSTIM_EPSILON) && (rem == 0)) 4375 break; 4376 } 4377 4378 return systim; 4379 } 4380 4381 /** 4382 * e1000e_read_systim - read SYSTIM register 4383 * @adapter: board private structure 4384 * @sts: structure which will contain system time before and after reading 4385 * SYSTIML, may be NULL 4386 **/ 4387 u64 e1000e_read_systim(struct e1000_adapter *adapter, 4388 struct ptp_system_timestamp *sts) 4389 { 4390 struct e1000_hw *hw = &adapter->hw; 4391 u32 systimel, systimel_2, systimeh; 4392 u64 systim; 4393 /* SYSTIMH latching upon SYSTIML read does not work well. 4394 * This means that if SYSTIML overflows after we read it but before 4395 * we read SYSTIMH, the value of SYSTIMH has been incremented and we 4396 * will experience a huge non linear increment in the systime value 4397 * to fix that we test for overflow and if true, we re-read systime. 4398 */ 4399 ptp_read_system_prets(sts); 4400 systimel = er32(SYSTIML); 4401 ptp_read_system_postts(sts); 4402 systimeh = er32(SYSTIMH); 4403 /* Is systimel is so large that overflow is possible? */ 4404 if (systimel >= (u32)0xffffffff - E1000_TIMINCA_INCVALUE_MASK) { 4405 ptp_read_system_prets(sts); 4406 systimel_2 = er32(SYSTIML); 4407 ptp_read_system_postts(sts); 4408 if (systimel > systimel_2) { 4409 /* There was an overflow, read again SYSTIMH, and use 4410 * systimel_2 4411 */ 4412 systimeh = er32(SYSTIMH); 4413 systimel = systimel_2; 4414 } 4415 } 4416 systim = (u64)systimel; 4417 systim |= (u64)systimeh << 32; 4418 4419 if (adapter->flags2 & FLAG2_CHECK_SYSTIM_OVERFLOW) 4420 systim = e1000e_sanitize_systim(hw, systim, sts); 4421 4422 return systim; 4423 } 4424 4425 /** 4426 * e1000e_cyclecounter_read - read raw cycle counter (used by time counter) 4427 * @cc: cyclecounter structure 4428 **/ 4429 static u64 e1000e_cyclecounter_read(const struct cyclecounter *cc) 4430 { 4431 struct e1000_adapter *adapter = container_of(cc, struct e1000_adapter, 4432 cc); 4433 4434 return e1000e_read_systim(adapter, NULL); 4435 } 4436 4437 /** 4438 * e1000_sw_init - Initialize general software structures (struct e1000_adapter) 4439 * @adapter: board private structure to initialize 4440 * 4441 * e1000_sw_init initializes the Adapter private data structure. 4442 * Fields are initialized based on PCI device information and 4443 * OS network device settings (MTU size). 4444 **/ 4445 static int e1000_sw_init(struct e1000_adapter *adapter) 4446 { 4447 struct net_device *netdev = adapter->netdev; 4448 4449 adapter->rx_buffer_len = VLAN_ETH_FRAME_LEN + ETH_FCS_LEN; 4450 adapter->rx_ps_bsize0 = 128; 4451 adapter->max_frame_size = netdev->mtu + VLAN_ETH_HLEN + ETH_FCS_LEN; 4452 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; 4453 adapter->tx_ring_count = E1000_DEFAULT_TXD; 4454 adapter->rx_ring_count = E1000_DEFAULT_RXD; 4455 4456 spin_lock_init(&adapter->stats64_lock); 4457 4458 e1000e_set_interrupt_capability(adapter); 4459 4460 if (e1000_alloc_queues(adapter)) 4461 return -ENOMEM; 4462 4463 /* Setup hardware time stamping cyclecounter */ 4464 if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) { 4465 adapter->cc.read = e1000e_cyclecounter_read; 4466 adapter->cc.mask = CYCLECOUNTER_MASK(64); 4467 adapter->cc.mult = 1; 4468 /* cc.shift set in e1000e_get_base_tininca() */ 4469 4470 spin_lock_init(&adapter->systim_lock); 4471 INIT_WORK(&adapter->tx_hwtstamp_work, e1000e_tx_hwtstamp_work); 4472 } 4473 4474 /* Explicitly disable IRQ since the NIC can be in any state. */ 4475 e1000_irq_disable(adapter); 4476 4477 set_bit(__E1000_DOWN, &adapter->state); 4478 return 0; 4479 } 4480 4481 /** 4482 * e1000_intr_msi_test - Interrupt Handler 4483 * @irq: interrupt number 4484 * @data: pointer to a network interface device structure 4485 **/ 4486 static irqreturn_t e1000_intr_msi_test(int __always_unused irq, void *data) 4487 { 4488 struct net_device *netdev = data; 4489 struct e1000_adapter *adapter = netdev_priv(netdev); 4490 struct e1000_hw *hw = &adapter->hw; 4491 u32 icr = er32(ICR); 4492 4493 e_dbg("icr is %08X\n", icr); 4494 if (icr & E1000_ICR_RXSEQ) { 4495 adapter->flags &= ~FLAG_MSI_TEST_FAILED; 4496 /* Force memory writes to complete before acknowledging the 4497 * interrupt is handled. 4498 */ 4499 wmb(); 4500 } 4501 4502 return IRQ_HANDLED; 4503 } 4504 4505 /** 4506 * e1000_test_msi_interrupt - Returns 0 for successful test 4507 * @adapter: board private struct 4508 * 4509 * code flow taken from tg3.c 4510 **/ 4511 static int e1000_test_msi_interrupt(struct e1000_adapter *adapter) 4512 { 4513 struct net_device *netdev = adapter->netdev; 4514 struct e1000_hw *hw = &adapter->hw; 4515 int err; 4516 4517 /* poll_enable hasn't been called yet, so don't need disable */ 4518 /* clear any pending events */ 4519 er32(ICR); 4520 4521 /* free the real vector and request a test handler */ 4522 e1000_free_irq(adapter); 4523 e1000e_reset_interrupt_capability(adapter); 4524 4525 /* Assume that the test fails, if it succeeds then the test 4526 * MSI irq handler will unset this flag 4527 */ 4528 adapter->flags |= FLAG_MSI_TEST_FAILED; 4529 4530 err = pci_enable_msi(adapter->pdev); 4531 if (err) 4532 goto msi_test_failed; 4533 4534 err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0, 4535 netdev->name, netdev); 4536 if (err) { 4537 pci_disable_msi(adapter->pdev); 4538 goto msi_test_failed; 4539 } 4540 4541 /* Force memory writes to complete before enabling and firing an 4542 * interrupt. 4543 */ 4544 wmb(); 4545 4546 e1000_irq_enable(adapter); 4547 4548 /* fire an unusual interrupt on the test handler */ 4549 ew32(ICS, E1000_ICS_RXSEQ); 4550 e1e_flush(); 4551 msleep(100); 4552 4553 e1000_irq_disable(adapter); 4554 4555 rmb(); /* read flags after interrupt has been fired */ 4556 4557 if (adapter->flags & FLAG_MSI_TEST_FAILED) { 4558 adapter->int_mode = E1000E_INT_MODE_LEGACY; 4559 e_info("MSI interrupt test failed, using legacy interrupt.\n"); 4560 } else { 4561 e_dbg("MSI interrupt test succeeded!\n"); 4562 } 4563 4564 free_irq(adapter->pdev->irq, netdev); 4565 pci_disable_msi(adapter->pdev); 4566 4567 msi_test_failed: 4568 e1000e_set_interrupt_capability(adapter); 4569 return e1000_request_irq(adapter); 4570 } 4571 4572 /** 4573 * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored 4574 * @adapter: board private struct 4575 * 4576 * code flow taken from tg3.c, called with e1000 interrupts disabled. 4577 **/ 4578 static int e1000_test_msi(struct e1000_adapter *adapter) 4579 { 4580 int err; 4581 u16 pci_cmd; 4582 4583 if (!(adapter->flags & FLAG_MSI_ENABLED)) 4584 return 0; 4585 4586 /* disable SERR in case the MSI write causes a master abort */ 4587 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd); 4588 if (pci_cmd & PCI_COMMAND_SERR) 4589 pci_write_config_word(adapter->pdev, PCI_COMMAND, 4590 pci_cmd & ~PCI_COMMAND_SERR); 4591 4592 err = e1000_test_msi_interrupt(adapter); 4593 4594 /* re-enable SERR */ 4595 if (pci_cmd & PCI_COMMAND_SERR) { 4596 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd); 4597 pci_cmd |= PCI_COMMAND_SERR; 4598 pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd); 4599 } 4600 4601 return err; 4602 } 4603 4604 /** 4605 * e1000e_open - Called when a network interface is made active 4606 * @netdev: network interface device structure 4607 * 4608 * Returns 0 on success, negative value on failure 4609 * 4610 * The open entry point is called when a network interface is made 4611 * active by the system (IFF_UP). At this point all resources needed 4612 * for transmit and receive operations are allocated, the interrupt 4613 * handler is registered with the OS, the watchdog timer is started, 4614 * and the stack is notified that the interface is ready. 4615 **/ 4616 int e1000e_open(struct net_device *netdev) 4617 { 4618 struct e1000_adapter *adapter = netdev_priv(netdev); 4619 struct e1000_hw *hw = &adapter->hw; 4620 struct pci_dev *pdev = adapter->pdev; 4621 int err; 4622 4623 /* disallow open during test */ 4624 if (test_bit(__E1000_TESTING, &adapter->state)) 4625 return -EBUSY; 4626 4627 pm_runtime_get_sync(&pdev->dev); 4628 4629 netif_carrier_off(netdev); 4630 netif_stop_queue(netdev); 4631 4632 /* allocate transmit descriptors */ 4633 err = e1000e_setup_tx_resources(adapter->tx_ring); 4634 if (err) 4635 goto err_setup_tx; 4636 4637 /* allocate receive descriptors */ 4638 err = e1000e_setup_rx_resources(adapter->rx_ring); 4639 if (err) 4640 goto err_setup_rx; 4641 4642 /* If AMT is enabled, let the firmware know that the network 4643 * interface is now open and reset the part to a known state. 4644 */ 4645 if (adapter->flags & FLAG_HAS_AMT) { 4646 e1000e_get_hw_control(adapter); 4647 e1000e_reset(adapter); 4648 } 4649 4650 e1000e_power_up_phy(adapter); 4651 4652 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; 4653 if ((adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN)) 4654 e1000_update_mng_vlan(adapter); 4655 4656 /* DMA latency requirement to workaround jumbo issue */ 4657 cpu_latency_qos_add_request(&adapter->pm_qos_req, PM_QOS_DEFAULT_VALUE); 4658 4659 /* before we allocate an interrupt, we must be ready to handle it. 4660 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt 4661 * as soon as we call pci_request_irq, so we have to setup our 4662 * clean_rx handler before we do so. 4663 */ 4664 e1000_configure(adapter); 4665 4666 err = e1000_request_irq(adapter); 4667 if (err) 4668 goto err_req_irq; 4669 4670 /* Work around PCIe errata with MSI interrupts causing some chipsets to 4671 * ignore e1000e MSI messages, which means we need to test our MSI 4672 * interrupt now 4673 */ 4674 if (adapter->int_mode != E1000E_INT_MODE_LEGACY) { 4675 err = e1000_test_msi(adapter); 4676 if (err) { 4677 e_err("Interrupt allocation failed\n"); 4678 goto err_req_irq; 4679 } 4680 } 4681 4682 /* From here on the code is the same as e1000e_up() */ 4683 clear_bit(__E1000_DOWN, &adapter->state); 4684 4685 napi_enable(&adapter->napi); 4686 4687 e1000_irq_enable(adapter); 4688 4689 adapter->tx_hang_recheck = false; 4690 4691 hw->mac.get_link_status = true; 4692 pm_runtime_put(&pdev->dev); 4693 4694 e1000e_trigger_lsc(adapter); 4695 4696 return 0; 4697 4698 err_req_irq: 4699 cpu_latency_qos_remove_request(&adapter->pm_qos_req); 4700 e1000e_release_hw_control(adapter); 4701 e1000_power_down_phy(adapter); 4702 e1000e_free_rx_resources(adapter->rx_ring); 4703 err_setup_rx: 4704 e1000e_free_tx_resources(adapter->tx_ring); 4705 err_setup_tx: 4706 e1000e_reset(adapter); 4707 pm_runtime_put_sync(&pdev->dev); 4708 4709 return err; 4710 } 4711 4712 /** 4713 * e1000e_close - Disables a network interface 4714 * @netdev: network interface device structure 4715 * 4716 * Returns 0, this is not allowed to fail 4717 * 4718 * The close entry point is called when an interface is de-activated 4719 * by the OS. The hardware is still under the drivers control, but 4720 * needs to be disabled. A global MAC reset is issued to stop the 4721 * hardware, and all transmit and receive resources are freed. 4722 **/ 4723 int e1000e_close(struct net_device *netdev) 4724 { 4725 struct e1000_adapter *adapter = netdev_priv(netdev); 4726 struct pci_dev *pdev = adapter->pdev; 4727 int count = E1000_CHECK_RESET_COUNT; 4728 4729 while (test_bit(__E1000_RESETTING, &adapter->state) && count--) 4730 usleep_range(10000, 11000); 4731 4732 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state)); 4733 4734 pm_runtime_get_sync(&pdev->dev); 4735 4736 if (netif_device_present(netdev)) { 4737 e1000e_down(adapter, true); 4738 e1000_free_irq(adapter); 4739 4740 /* Link status message must follow this format */ 4741 netdev_info(netdev, "NIC Link is Down\n"); 4742 } 4743 4744 napi_disable(&adapter->napi); 4745 4746 e1000e_free_tx_resources(adapter->tx_ring); 4747 e1000e_free_rx_resources(adapter->rx_ring); 4748 4749 /* kill manageability vlan ID if supported, but not if a vlan with 4750 * the same ID is registered on the host OS (let 8021q kill it) 4751 */ 4752 if (adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) 4753 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), 4754 adapter->mng_vlan_id); 4755 4756 /* If AMT is enabled, let the firmware know that the network 4757 * interface is now closed 4758 */ 4759 if ((adapter->flags & FLAG_HAS_AMT) && 4760 !test_bit(__E1000_TESTING, &adapter->state)) 4761 e1000e_release_hw_control(adapter); 4762 4763 cpu_latency_qos_remove_request(&adapter->pm_qos_req); 4764 4765 pm_runtime_put_sync(&pdev->dev); 4766 4767 return 0; 4768 } 4769 4770 /** 4771 * e1000_set_mac - Change the Ethernet Address of the NIC 4772 * @netdev: network interface device structure 4773 * @p: pointer to an address structure 4774 * 4775 * Returns 0 on success, negative on failure 4776 **/ 4777 static int e1000_set_mac(struct net_device *netdev, void *p) 4778 { 4779 struct e1000_adapter *adapter = netdev_priv(netdev); 4780 struct e1000_hw *hw = &adapter->hw; 4781 struct sockaddr *addr = p; 4782 4783 if (!is_valid_ether_addr(addr->sa_data)) 4784 return -EADDRNOTAVAIL; 4785 4786 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 4787 memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len); 4788 4789 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 0); 4790 4791 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) { 4792 /* activate the work around */ 4793 e1000e_set_laa_state_82571(&adapter->hw, 1); 4794 4795 /* Hold a copy of the LAA in RAR[14] This is done so that 4796 * between the time RAR[0] gets clobbered and the time it 4797 * gets fixed (in e1000_watchdog), the actual LAA is in one 4798 * of the RARs and no incoming packets directed to this port 4799 * are dropped. Eventually the LAA will be in RAR[0] and 4800 * RAR[14] 4801 */ 4802 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 4803 adapter->hw.mac.rar_entry_count - 1); 4804 } 4805 4806 return 0; 4807 } 4808 4809 /** 4810 * e1000e_update_phy_task - work thread to update phy 4811 * @work: pointer to our work struct 4812 * 4813 * this worker thread exists because we must acquire a 4814 * semaphore to read the phy, which we could msleep while 4815 * waiting for it, and we can't msleep in a timer. 4816 **/ 4817 static void e1000e_update_phy_task(struct work_struct *work) 4818 { 4819 struct e1000_adapter *adapter = container_of(work, 4820 struct e1000_adapter, 4821 update_phy_task); 4822 struct e1000_hw *hw = &adapter->hw; 4823 4824 if (test_bit(__E1000_DOWN, &adapter->state)) 4825 return; 4826 4827 e1000_get_phy_info(hw); 4828 4829 /* Enable EEE on 82579 after link up */ 4830 if (hw->phy.type >= e1000_phy_82579) 4831 e1000_set_eee_pchlan(hw); 4832 } 4833 4834 /** 4835 * e1000_update_phy_info - timre call-back to update PHY info 4836 * @t: pointer to timer_list containing private info adapter 4837 * 4838 * Need to wait a few seconds after link up to get diagnostic information from 4839 * the phy 4840 **/ 4841 static void e1000_update_phy_info(struct timer_list *t) 4842 { 4843 struct e1000_adapter *adapter = from_timer(adapter, t, phy_info_timer); 4844 4845 if (test_bit(__E1000_DOWN, &adapter->state)) 4846 return; 4847 4848 schedule_work(&adapter->update_phy_task); 4849 } 4850 4851 /** 4852 * e1000e_update_phy_stats - Update the PHY statistics counters 4853 * @adapter: board private structure 4854 * 4855 * Read/clear the upper 16-bit PHY registers and read/accumulate lower 4856 **/ 4857 static void e1000e_update_phy_stats(struct e1000_adapter *adapter) 4858 { 4859 struct e1000_hw *hw = &adapter->hw; 4860 s32 ret_val; 4861 u16 phy_data; 4862 4863 ret_val = hw->phy.ops.acquire(hw); 4864 if (ret_val) 4865 return; 4866 4867 /* A page set is expensive so check if already on desired page. 4868 * If not, set to the page with the PHY status registers. 4869 */ 4870 hw->phy.addr = 1; 4871 ret_val = e1000e_read_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, 4872 &phy_data); 4873 if (ret_val) 4874 goto release; 4875 if (phy_data != (HV_STATS_PAGE << IGP_PAGE_SHIFT)) { 4876 ret_val = hw->phy.ops.set_page(hw, 4877 HV_STATS_PAGE << IGP_PAGE_SHIFT); 4878 if (ret_val) 4879 goto release; 4880 } 4881 4882 /* Single Collision Count */ 4883 hw->phy.ops.read_reg_page(hw, HV_SCC_UPPER, &phy_data); 4884 ret_val = hw->phy.ops.read_reg_page(hw, HV_SCC_LOWER, &phy_data); 4885 if (!ret_val) 4886 adapter->stats.scc += phy_data; 4887 4888 /* Excessive Collision Count */ 4889 hw->phy.ops.read_reg_page(hw, HV_ECOL_UPPER, &phy_data); 4890 ret_val = hw->phy.ops.read_reg_page(hw, HV_ECOL_LOWER, &phy_data); 4891 if (!ret_val) 4892 adapter->stats.ecol += phy_data; 4893 4894 /* Multiple Collision Count */ 4895 hw->phy.ops.read_reg_page(hw, HV_MCC_UPPER, &phy_data); 4896 ret_val = hw->phy.ops.read_reg_page(hw, HV_MCC_LOWER, &phy_data); 4897 if (!ret_val) 4898 adapter->stats.mcc += phy_data; 4899 4900 /* Late Collision Count */ 4901 hw->phy.ops.read_reg_page(hw, HV_LATECOL_UPPER, &phy_data); 4902 ret_val = hw->phy.ops.read_reg_page(hw, HV_LATECOL_LOWER, &phy_data); 4903 if (!ret_val) 4904 adapter->stats.latecol += phy_data; 4905 4906 /* Collision Count - also used for adaptive IFS */ 4907 hw->phy.ops.read_reg_page(hw, HV_COLC_UPPER, &phy_data); 4908 ret_val = hw->phy.ops.read_reg_page(hw, HV_COLC_LOWER, &phy_data); 4909 if (!ret_val) 4910 hw->mac.collision_delta = phy_data; 4911 4912 /* Defer Count */ 4913 hw->phy.ops.read_reg_page(hw, HV_DC_UPPER, &phy_data); 4914 ret_val = hw->phy.ops.read_reg_page(hw, HV_DC_LOWER, &phy_data); 4915 if (!ret_val) 4916 adapter->stats.dc += phy_data; 4917 4918 /* Transmit with no CRS */ 4919 hw->phy.ops.read_reg_page(hw, HV_TNCRS_UPPER, &phy_data); 4920 ret_val = hw->phy.ops.read_reg_page(hw, HV_TNCRS_LOWER, &phy_data); 4921 if (!ret_val) 4922 adapter->stats.tncrs += phy_data; 4923 4924 release: 4925 hw->phy.ops.release(hw); 4926 } 4927 4928 /** 4929 * e1000e_update_stats - Update the board statistics counters 4930 * @adapter: board private structure 4931 **/ 4932 static void e1000e_update_stats(struct e1000_adapter *adapter) 4933 { 4934 struct net_device *netdev = adapter->netdev; 4935 struct e1000_hw *hw = &adapter->hw; 4936 struct pci_dev *pdev = adapter->pdev; 4937 4938 /* Prevent stats update while adapter is being reset, or if the pci 4939 * connection is down. 4940 */ 4941 if (adapter->link_speed == 0) 4942 return; 4943 if (pci_channel_offline(pdev)) 4944 return; 4945 4946 adapter->stats.crcerrs += er32(CRCERRS); 4947 adapter->stats.gprc += er32(GPRC); 4948 adapter->stats.gorc += er32(GORCL); 4949 er32(GORCH); /* Clear gorc */ 4950 adapter->stats.bprc += er32(BPRC); 4951 adapter->stats.mprc += er32(MPRC); 4952 adapter->stats.roc += er32(ROC); 4953 4954 adapter->stats.mpc += er32(MPC); 4955 4956 /* Half-duplex statistics */ 4957 if (adapter->link_duplex == HALF_DUPLEX) { 4958 if (adapter->flags2 & FLAG2_HAS_PHY_STATS) { 4959 e1000e_update_phy_stats(adapter); 4960 } else { 4961 adapter->stats.scc += er32(SCC); 4962 adapter->stats.ecol += er32(ECOL); 4963 adapter->stats.mcc += er32(MCC); 4964 adapter->stats.latecol += er32(LATECOL); 4965 adapter->stats.dc += er32(DC); 4966 4967 hw->mac.collision_delta = er32(COLC); 4968 4969 if ((hw->mac.type != e1000_82574) && 4970 (hw->mac.type != e1000_82583)) 4971 adapter->stats.tncrs += er32(TNCRS); 4972 } 4973 adapter->stats.colc += hw->mac.collision_delta; 4974 } 4975 4976 adapter->stats.xonrxc += er32(XONRXC); 4977 adapter->stats.xontxc += er32(XONTXC); 4978 adapter->stats.xoffrxc += er32(XOFFRXC); 4979 adapter->stats.xofftxc += er32(XOFFTXC); 4980 adapter->stats.gptc += er32(GPTC); 4981 adapter->stats.gotc += er32(GOTCL); 4982 er32(GOTCH); /* Clear gotc */ 4983 adapter->stats.rnbc += er32(RNBC); 4984 adapter->stats.ruc += er32(RUC); 4985 4986 adapter->stats.mptc += er32(MPTC); 4987 adapter->stats.bptc += er32(BPTC); 4988 4989 /* used for adaptive IFS */ 4990 4991 hw->mac.tx_packet_delta = er32(TPT); 4992 adapter->stats.tpt += hw->mac.tx_packet_delta; 4993 4994 adapter->stats.algnerrc += er32(ALGNERRC); 4995 adapter->stats.rxerrc += er32(RXERRC); 4996 adapter->stats.cexterr += er32(CEXTERR); 4997 adapter->stats.tsctc += er32(TSCTC); 4998 adapter->stats.tsctfc += er32(TSCTFC); 4999 5000 /* Fill out the OS statistics structure */ 5001 netdev->stats.multicast = adapter->stats.mprc; 5002 netdev->stats.collisions = adapter->stats.colc; 5003 5004 /* Rx Errors */ 5005 5006 /* RLEC on some newer hardware can be incorrect so build 5007 * our own version based on RUC and ROC 5008 */ 5009 netdev->stats.rx_errors = adapter->stats.rxerrc + 5010 adapter->stats.crcerrs + adapter->stats.algnerrc + 5011 adapter->stats.ruc + adapter->stats.roc + adapter->stats.cexterr; 5012 netdev->stats.rx_length_errors = adapter->stats.ruc + 5013 adapter->stats.roc; 5014 netdev->stats.rx_crc_errors = adapter->stats.crcerrs; 5015 netdev->stats.rx_frame_errors = adapter->stats.algnerrc; 5016 netdev->stats.rx_missed_errors = adapter->stats.mpc; 5017 5018 /* Tx Errors */ 5019 netdev->stats.tx_errors = adapter->stats.ecol + adapter->stats.latecol; 5020 netdev->stats.tx_aborted_errors = adapter->stats.ecol; 5021 netdev->stats.tx_window_errors = adapter->stats.latecol; 5022 netdev->stats.tx_carrier_errors = adapter->stats.tncrs; 5023 5024 /* Tx Dropped needs to be maintained elsewhere */ 5025 5026 /* Management Stats */ 5027 adapter->stats.mgptc += er32(MGTPTC); 5028 adapter->stats.mgprc += er32(MGTPRC); 5029 adapter->stats.mgpdc += er32(MGTPDC); 5030 5031 /* Correctable ECC Errors */ 5032 if (hw->mac.type >= e1000_pch_lpt) { 5033 u32 pbeccsts = er32(PBECCSTS); 5034 5035 adapter->corr_errors += 5036 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK; 5037 adapter->uncorr_errors += 5038 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >> 5039 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT; 5040 } 5041 } 5042 5043 /** 5044 * e1000_phy_read_status - Update the PHY register status snapshot 5045 * @adapter: board private structure 5046 **/ 5047 static void e1000_phy_read_status(struct e1000_adapter *adapter) 5048 { 5049 struct e1000_hw *hw = &adapter->hw; 5050 struct e1000_phy_regs *phy = &adapter->phy_regs; 5051 5052 if (!pm_runtime_suspended((&adapter->pdev->dev)->parent) && 5053 (er32(STATUS) & E1000_STATUS_LU) && 5054 (adapter->hw.phy.media_type == e1000_media_type_copper)) { 5055 int ret_val; 5056 5057 ret_val = e1e_rphy(hw, MII_BMCR, &phy->bmcr); 5058 ret_val |= e1e_rphy(hw, MII_BMSR, &phy->bmsr); 5059 ret_val |= e1e_rphy(hw, MII_ADVERTISE, &phy->advertise); 5060 ret_val |= e1e_rphy(hw, MII_LPA, &phy->lpa); 5061 ret_val |= e1e_rphy(hw, MII_EXPANSION, &phy->expansion); 5062 ret_val |= e1e_rphy(hw, MII_CTRL1000, &phy->ctrl1000); 5063 ret_val |= e1e_rphy(hw, MII_STAT1000, &phy->stat1000); 5064 ret_val |= e1e_rphy(hw, MII_ESTATUS, &phy->estatus); 5065 if (ret_val) 5066 e_warn("Error reading PHY register\n"); 5067 } else { 5068 /* Do not read PHY registers if link is not up 5069 * Set values to typical power-on defaults 5070 */ 5071 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX); 5072 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL | 5073 BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE | 5074 BMSR_ERCAP); 5075 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP | 5076 ADVERTISE_ALL | ADVERTISE_CSMA); 5077 phy->lpa = 0; 5078 phy->expansion = EXPANSION_ENABLENPAGE; 5079 phy->ctrl1000 = ADVERTISE_1000FULL; 5080 phy->stat1000 = 0; 5081 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF); 5082 } 5083 } 5084 5085 static void e1000_print_link_info(struct e1000_adapter *adapter) 5086 { 5087 struct e1000_hw *hw = &adapter->hw; 5088 u32 ctrl = er32(CTRL); 5089 5090 /* Link status message must follow this format for user tools */ 5091 netdev_info(adapter->netdev, 5092 "NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n", 5093 adapter->link_speed, 5094 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half", 5095 (ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE) ? "Rx/Tx" : 5096 (ctrl & E1000_CTRL_RFCE) ? "Rx" : 5097 (ctrl & E1000_CTRL_TFCE) ? "Tx" : "None"); 5098 } 5099 5100 static bool e1000e_has_link(struct e1000_adapter *adapter) 5101 { 5102 struct e1000_hw *hw = &adapter->hw; 5103 bool link_active = false; 5104 s32 ret_val = 0; 5105 5106 /* get_link_status is set on LSC (link status) interrupt or 5107 * Rx sequence error interrupt. get_link_status will stay 5108 * true until the check_for_link establishes link 5109 * for copper adapters ONLY 5110 */ 5111 switch (hw->phy.media_type) { 5112 case e1000_media_type_copper: 5113 if (hw->mac.get_link_status) { 5114 ret_val = hw->mac.ops.check_for_link(hw); 5115 link_active = !hw->mac.get_link_status; 5116 } else { 5117 link_active = true; 5118 } 5119 break; 5120 case e1000_media_type_fiber: 5121 ret_val = hw->mac.ops.check_for_link(hw); 5122 link_active = !!(er32(STATUS) & E1000_STATUS_LU); 5123 break; 5124 case e1000_media_type_internal_serdes: 5125 ret_val = hw->mac.ops.check_for_link(hw); 5126 link_active = hw->mac.serdes_has_link; 5127 break; 5128 default: 5129 case e1000_media_type_unknown: 5130 break; 5131 } 5132 5133 if ((ret_val == -E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) && 5134 (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) { 5135 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */ 5136 e_info("Gigabit has been disabled, downgrading speed\n"); 5137 } 5138 5139 return link_active; 5140 } 5141 5142 static void e1000e_enable_receives(struct e1000_adapter *adapter) 5143 { 5144 /* make sure the receive unit is started */ 5145 if ((adapter->flags & FLAG_RX_NEEDS_RESTART) && 5146 (adapter->flags & FLAG_RESTART_NOW)) { 5147 struct e1000_hw *hw = &adapter->hw; 5148 u32 rctl = er32(RCTL); 5149 5150 ew32(RCTL, rctl | E1000_RCTL_EN); 5151 adapter->flags &= ~FLAG_RESTART_NOW; 5152 } 5153 } 5154 5155 static void e1000e_check_82574_phy_workaround(struct e1000_adapter *adapter) 5156 { 5157 struct e1000_hw *hw = &adapter->hw; 5158 5159 /* With 82574 controllers, PHY needs to be checked periodically 5160 * for hung state and reset, if two calls return true 5161 */ 5162 if (e1000_check_phy_82574(hw)) 5163 adapter->phy_hang_count++; 5164 else 5165 adapter->phy_hang_count = 0; 5166 5167 if (adapter->phy_hang_count > 1) { 5168 adapter->phy_hang_count = 0; 5169 e_dbg("PHY appears hung - resetting\n"); 5170 schedule_work(&adapter->reset_task); 5171 } 5172 } 5173 5174 /** 5175 * e1000_watchdog - Timer Call-back 5176 * @t: pointer to timer_list containing private info adapter 5177 **/ 5178 static void e1000_watchdog(struct timer_list *t) 5179 { 5180 struct e1000_adapter *adapter = from_timer(adapter, t, watchdog_timer); 5181 5182 /* Do the rest outside of interrupt context */ 5183 schedule_work(&adapter->watchdog_task); 5184 5185 /* TODO: make this use queue_delayed_work() */ 5186 } 5187 5188 static void e1000_watchdog_task(struct work_struct *work) 5189 { 5190 struct e1000_adapter *adapter = container_of(work, 5191 struct e1000_adapter, 5192 watchdog_task); 5193 struct net_device *netdev = adapter->netdev; 5194 struct e1000_mac_info *mac = &adapter->hw.mac; 5195 struct e1000_phy_info *phy = &adapter->hw.phy; 5196 struct e1000_ring *tx_ring = adapter->tx_ring; 5197 u32 dmoff_exit_timeout = 100, tries = 0; 5198 struct e1000_hw *hw = &adapter->hw; 5199 u32 link, tctl, pcim_state; 5200 5201 if (test_bit(__E1000_DOWN, &adapter->state)) 5202 return; 5203 5204 link = e1000e_has_link(adapter); 5205 if ((netif_carrier_ok(netdev)) && link) { 5206 /* Cancel scheduled suspend requests. */ 5207 pm_runtime_resume(netdev->dev.parent); 5208 5209 e1000e_enable_receives(adapter); 5210 goto link_up; 5211 } 5212 5213 if ((e1000e_enable_tx_pkt_filtering(hw)) && 5214 (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)) 5215 e1000_update_mng_vlan(adapter); 5216 5217 if (link) { 5218 if (!netif_carrier_ok(netdev)) { 5219 bool txb2b = true; 5220 5221 /* Cancel scheduled suspend requests. */ 5222 pm_runtime_resume(netdev->dev.parent); 5223 5224 /* Checking if MAC is in DMoff state*/ 5225 pcim_state = er32(STATUS); 5226 while (pcim_state & E1000_STATUS_PCIM_STATE) { 5227 if (tries++ == dmoff_exit_timeout) { 5228 e_dbg("Error in exiting dmoff\n"); 5229 break; 5230 } 5231 usleep_range(10000, 20000); 5232 pcim_state = er32(STATUS); 5233 5234 /* Checking if MAC exited DMoff state */ 5235 if (!(pcim_state & E1000_STATUS_PCIM_STATE)) 5236 e1000_phy_hw_reset(&adapter->hw); 5237 } 5238 5239 /* update snapshot of PHY registers on LSC */ 5240 e1000_phy_read_status(adapter); 5241 mac->ops.get_link_up_info(&adapter->hw, 5242 &adapter->link_speed, 5243 &adapter->link_duplex); 5244 e1000_print_link_info(adapter); 5245 5246 /* check if SmartSpeed worked */ 5247 e1000e_check_downshift(hw); 5248 if (phy->speed_downgraded) 5249 netdev_warn(netdev, 5250 "Link Speed was downgraded by SmartSpeed\n"); 5251 5252 /* On supported PHYs, check for duplex mismatch only 5253 * if link has autonegotiated at 10/100 half 5254 */ 5255 if ((hw->phy.type == e1000_phy_igp_3 || 5256 hw->phy.type == e1000_phy_bm) && 5257 hw->mac.autoneg && 5258 (adapter->link_speed == SPEED_10 || 5259 adapter->link_speed == SPEED_100) && 5260 (adapter->link_duplex == HALF_DUPLEX)) { 5261 u16 autoneg_exp; 5262 5263 e1e_rphy(hw, MII_EXPANSION, &autoneg_exp); 5264 5265 if (!(autoneg_exp & EXPANSION_NWAY)) 5266 e_info("Autonegotiated half duplex but link partner cannot autoneg. Try forcing full duplex if link gets many collisions.\n"); 5267 } 5268 5269 /* adjust timeout factor according to speed/duplex */ 5270 adapter->tx_timeout_factor = 1; 5271 switch (adapter->link_speed) { 5272 case SPEED_10: 5273 txb2b = false; 5274 adapter->tx_timeout_factor = 16; 5275 break; 5276 case SPEED_100: 5277 txb2b = false; 5278 adapter->tx_timeout_factor = 10; 5279 break; 5280 } 5281 5282 /* workaround: re-program speed mode bit after 5283 * link-up event 5284 */ 5285 if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) && 5286 !txb2b) { 5287 u32 tarc0; 5288 5289 tarc0 = er32(TARC(0)); 5290 tarc0 &= ~SPEED_MODE_BIT; 5291 ew32(TARC(0), tarc0); 5292 } 5293 5294 /* disable TSO for pcie and 10/100 speeds, to avoid 5295 * some hardware issues 5296 */ 5297 if (!(adapter->flags & FLAG_TSO_FORCE)) { 5298 switch (adapter->link_speed) { 5299 case SPEED_10: 5300 case SPEED_100: 5301 e_info("10/100 speed: disabling TSO\n"); 5302 netdev->features &= ~NETIF_F_TSO; 5303 netdev->features &= ~NETIF_F_TSO6; 5304 break; 5305 case SPEED_1000: 5306 netdev->features |= NETIF_F_TSO; 5307 netdev->features |= NETIF_F_TSO6; 5308 break; 5309 default: 5310 /* oops */ 5311 break; 5312 } 5313 if (hw->mac.type == e1000_pch_spt) { 5314 netdev->features &= ~NETIF_F_TSO; 5315 netdev->features &= ~NETIF_F_TSO6; 5316 } 5317 } 5318 5319 /* enable transmits in the hardware, need to do this 5320 * after setting TARC(0) 5321 */ 5322 tctl = er32(TCTL); 5323 tctl |= E1000_TCTL_EN; 5324 ew32(TCTL, tctl); 5325 5326 /* Perform any post-link-up configuration before 5327 * reporting link up. 5328 */ 5329 if (phy->ops.cfg_on_link_up) 5330 phy->ops.cfg_on_link_up(hw); 5331 5332 netif_wake_queue(netdev); 5333 netif_carrier_on(netdev); 5334 5335 if (!test_bit(__E1000_DOWN, &adapter->state)) 5336 mod_timer(&adapter->phy_info_timer, 5337 round_jiffies(jiffies + 2 * HZ)); 5338 } 5339 } else { 5340 if (netif_carrier_ok(netdev)) { 5341 adapter->link_speed = 0; 5342 adapter->link_duplex = 0; 5343 /* Link status message must follow this format */ 5344 netdev_info(netdev, "NIC Link is Down\n"); 5345 netif_carrier_off(netdev); 5346 netif_stop_queue(netdev); 5347 if (!test_bit(__E1000_DOWN, &adapter->state)) 5348 mod_timer(&adapter->phy_info_timer, 5349 round_jiffies(jiffies + 2 * HZ)); 5350 5351 /* 8000ES2LAN requires a Rx packet buffer work-around 5352 * on link down event; reset the controller to flush 5353 * the Rx packet buffer. 5354 */ 5355 if (adapter->flags & FLAG_RX_NEEDS_RESTART) 5356 adapter->flags |= FLAG_RESTART_NOW; 5357 else 5358 pm_schedule_suspend(netdev->dev.parent, 5359 LINK_TIMEOUT); 5360 } 5361 } 5362 5363 link_up: 5364 spin_lock(&adapter->stats64_lock); 5365 e1000e_update_stats(adapter); 5366 5367 mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old; 5368 adapter->tpt_old = adapter->stats.tpt; 5369 mac->collision_delta = adapter->stats.colc - adapter->colc_old; 5370 adapter->colc_old = adapter->stats.colc; 5371 5372 adapter->gorc = adapter->stats.gorc - adapter->gorc_old; 5373 adapter->gorc_old = adapter->stats.gorc; 5374 adapter->gotc = adapter->stats.gotc - adapter->gotc_old; 5375 adapter->gotc_old = adapter->stats.gotc; 5376 spin_unlock(&adapter->stats64_lock); 5377 5378 /* If the link is lost the controller stops DMA, but 5379 * if there is queued Tx work it cannot be done. So 5380 * reset the controller to flush the Tx packet buffers. 5381 */ 5382 if (!netif_carrier_ok(netdev) && 5383 (e1000_desc_unused(tx_ring) + 1 < tx_ring->count)) 5384 adapter->flags |= FLAG_RESTART_NOW; 5385 5386 /* If reset is necessary, do it outside of interrupt context. */ 5387 if (adapter->flags & FLAG_RESTART_NOW) { 5388 schedule_work(&adapter->reset_task); 5389 /* return immediately since reset is imminent */ 5390 return; 5391 } 5392 5393 e1000e_update_adaptive(&adapter->hw); 5394 5395 /* Simple mode for Interrupt Throttle Rate (ITR) */ 5396 if (adapter->itr_setting == 4) { 5397 /* Symmetric Tx/Rx gets a reduced ITR=2000; 5398 * Total asymmetrical Tx or Rx gets ITR=8000; 5399 * everyone else is between 2000-8000. 5400 */ 5401 u32 goc = (adapter->gotc + adapter->gorc) / 10000; 5402 u32 dif = (adapter->gotc > adapter->gorc ? 5403 adapter->gotc - adapter->gorc : 5404 adapter->gorc - adapter->gotc) / 10000; 5405 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000; 5406 5407 e1000e_write_itr(adapter, itr); 5408 } 5409 5410 /* Cause software interrupt to ensure Rx ring is cleaned */ 5411 if (adapter->msix_entries) 5412 ew32(ICS, adapter->rx_ring->ims_val); 5413 else 5414 ew32(ICS, E1000_ICS_RXDMT0); 5415 5416 /* flush pending descriptors to memory before detecting Tx hang */ 5417 e1000e_flush_descriptors(adapter); 5418 5419 /* Force detection of hung controller every watchdog period */ 5420 adapter->detect_tx_hung = true; 5421 5422 /* With 82571 controllers, LAA may be overwritten due to controller 5423 * reset from the other port. Set the appropriate LAA in RAR[0] 5424 */ 5425 if (e1000e_get_laa_state_82571(hw)) 5426 hw->mac.ops.rar_set(hw, adapter->hw.mac.addr, 0); 5427 5428 if (adapter->flags2 & FLAG2_CHECK_PHY_HANG) 5429 e1000e_check_82574_phy_workaround(adapter); 5430 5431 /* Clear valid timestamp stuck in RXSTMPL/H due to a Rx error */ 5432 if (adapter->hwtstamp_config.rx_filter != HWTSTAMP_FILTER_NONE) { 5433 if ((adapter->flags2 & FLAG2_CHECK_RX_HWTSTAMP) && 5434 (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID)) { 5435 er32(RXSTMPH); 5436 adapter->rx_hwtstamp_cleared++; 5437 } else { 5438 adapter->flags2 |= FLAG2_CHECK_RX_HWTSTAMP; 5439 } 5440 } 5441 5442 /* Reset the timer */ 5443 if (!test_bit(__E1000_DOWN, &adapter->state)) 5444 mod_timer(&adapter->watchdog_timer, 5445 round_jiffies(jiffies + 2 * HZ)); 5446 } 5447 5448 #define E1000_TX_FLAGS_CSUM 0x00000001 5449 #define E1000_TX_FLAGS_VLAN 0x00000002 5450 #define E1000_TX_FLAGS_TSO 0x00000004 5451 #define E1000_TX_FLAGS_IPV4 0x00000008 5452 #define E1000_TX_FLAGS_NO_FCS 0x00000010 5453 #define E1000_TX_FLAGS_HWTSTAMP 0x00000020 5454 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000 5455 #define E1000_TX_FLAGS_VLAN_SHIFT 16 5456 5457 static int e1000_tso(struct e1000_ring *tx_ring, struct sk_buff *skb, 5458 __be16 protocol) 5459 { 5460 struct e1000_context_desc *context_desc; 5461 struct e1000_buffer *buffer_info; 5462 unsigned int i; 5463 u32 cmd_length = 0; 5464 u16 ipcse = 0, mss; 5465 u8 ipcss, ipcso, tucss, tucso, hdr_len; 5466 int err; 5467 5468 if (!skb_is_gso(skb)) 5469 return 0; 5470 5471 err = skb_cow_head(skb, 0); 5472 if (err < 0) 5473 return err; 5474 5475 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 5476 mss = skb_shinfo(skb)->gso_size; 5477 if (protocol == htons(ETH_P_IP)) { 5478 struct iphdr *iph = ip_hdr(skb); 5479 iph->tot_len = 0; 5480 iph->check = 0; 5481 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 5482 0, IPPROTO_TCP, 0); 5483 cmd_length = E1000_TXD_CMD_IP; 5484 ipcse = skb_transport_offset(skb) - 1; 5485 } else if (skb_is_gso_v6(skb)) { 5486 tcp_v6_gso_csum_prep(skb); 5487 ipcse = 0; 5488 } 5489 ipcss = skb_network_offset(skb); 5490 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data; 5491 tucss = skb_transport_offset(skb); 5492 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; 5493 5494 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE | 5495 E1000_TXD_CMD_TCP | (skb->len - (hdr_len))); 5496 5497 i = tx_ring->next_to_use; 5498 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); 5499 buffer_info = &tx_ring->buffer_info[i]; 5500 5501 context_desc->lower_setup.ip_fields.ipcss = ipcss; 5502 context_desc->lower_setup.ip_fields.ipcso = ipcso; 5503 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse); 5504 context_desc->upper_setup.tcp_fields.tucss = tucss; 5505 context_desc->upper_setup.tcp_fields.tucso = tucso; 5506 context_desc->upper_setup.tcp_fields.tucse = 0; 5507 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss); 5508 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len; 5509 context_desc->cmd_and_length = cpu_to_le32(cmd_length); 5510 5511 buffer_info->time_stamp = jiffies; 5512 buffer_info->next_to_watch = i; 5513 5514 i++; 5515 if (i == tx_ring->count) 5516 i = 0; 5517 tx_ring->next_to_use = i; 5518 5519 return 1; 5520 } 5521 5522 static bool e1000_tx_csum(struct e1000_ring *tx_ring, struct sk_buff *skb, 5523 __be16 protocol) 5524 { 5525 struct e1000_adapter *adapter = tx_ring->adapter; 5526 struct e1000_context_desc *context_desc; 5527 struct e1000_buffer *buffer_info; 5528 unsigned int i; 5529 u8 css; 5530 u32 cmd_len = E1000_TXD_CMD_DEXT; 5531 5532 if (skb->ip_summed != CHECKSUM_PARTIAL) 5533 return false; 5534 5535 switch (protocol) { 5536 case cpu_to_be16(ETH_P_IP): 5537 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 5538 cmd_len |= E1000_TXD_CMD_TCP; 5539 break; 5540 case cpu_to_be16(ETH_P_IPV6): 5541 /* XXX not handling all IPV6 headers */ 5542 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 5543 cmd_len |= E1000_TXD_CMD_TCP; 5544 break; 5545 default: 5546 if (unlikely(net_ratelimit())) 5547 e_warn("checksum_partial proto=%x!\n", 5548 be16_to_cpu(protocol)); 5549 break; 5550 } 5551 5552 css = skb_checksum_start_offset(skb); 5553 5554 i = tx_ring->next_to_use; 5555 buffer_info = &tx_ring->buffer_info[i]; 5556 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); 5557 5558 context_desc->lower_setup.ip_config = 0; 5559 context_desc->upper_setup.tcp_fields.tucss = css; 5560 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum_offset; 5561 context_desc->upper_setup.tcp_fields.tucse = 0; 5562 context_desc->tcp_seg_setup.data = 0; 5563 context_desc->cmd_and_length = cpu_to_le32(cmd_len); 5564 5565 buffer_info->time_stamp = jiffies; 5566 buffer_info->next_to_watch = i; 5567 5568 i++; 5569 if (i == tx_ring->count) 5570 i = 0; 5571 tx_ring->next_to_use = i; 5572 5573 return true; 5574 } 5575 5576 static int e1000_tx_map(struct e1000_ring *tx_ring, struct sk_buff *skb, 5577 unsigned int first, unsigned int max_per_txd, 5578 unsigned int nr_frags) 5579 { 5580 struct e1000_adapter *adapter = tx_ring->adapter; 5581 struct pci_dev *pdev = adapter->pdev; 5582 struct e1000_buffer *buffer_info; 5583 unsigned int len = skb_headlen(skb); 5584 unsigned int offset = 0, size, count = 0, i; 5585 unsigned int f, bytecount, segs; 5586 5587 i = tx_ring->next_to_use; 5588 5589 while (len) { 5590 buffer_info = &tx_ring->buffer_info[i]; 5591 size = min(len, max_per_txd); 5592 5593 buffer_info->length = size; 5594 buffer_info->time_stamp = jiffies; 5595 buffer_info->next_to_watch = i; 5596 buffer_info->dma = dma_map_single(&pdev->dev, 5597 skb->data + offset, 5598 size, DMA_TO_DEVICE); 5599 buffer_info->mapped_as_page = false; 5600 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 5601 goto dma_error; 5602 5603 len -= size; 5604 offset += size; 5605 count++; 5606 5607 if (len) { 5608 i++; 5609 if (i == tx_ring->count) 5610 i = 0; 5611 } 5612 } 5613 5614 for (f = 0; f < nr_frags; f++) { 5615 const skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; 5616 5617 len = skb_frag_size(frag); 5618 offset = 0; 5619 5620 while (len) { 5621 i++; 5622 if (i == tx_ring->count) 5623 i = 0; 5624 5625 buffer_info = &tx_ring->buffer_info[i]; 5626 size = min(len, max_per_txd); 5627 5628 buffer_info->length = size; 5629 buffer_info->time_stamp = jiffies; 5630 buffer_info->next_to_watch = i; 5631 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 5632 offset, size, 5633 DMA_TO_DEVICE); 5634 buffer_info->mapped_as_page = true; 5635 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 5636 goto dma_error; 5637 5638 len -= size; 5639 offset += size; 5640 count++; 5641 } 5642 } 5643 5644 segs = skb_shinfo(skb)->gso_segs ? : 1; 5645 /* multiply data chunks by size of headers */ 5646 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len; 5647 5648 tx_ring->buffer_info[i].skb = skb; 5649 tx_ring->buffer_info[i].segs = segs; 5650 tx_ring->buffer_info[i].bytecount = bytecount; 5651 tx_ring->buffer_info[first].next_to_watch = i; 5652 5653 return count; 5654 5655 dma_error: 5656 dev_err(&pdev->dev, "Tx DMA map failed\n"); 5657 buffer_info->dma = 0; 5658 if (count) 5659 count--; 5660 5661 while (count--) { 5662 if (i == 0) 5663 i += tx_ring->count; 5664 i--; 5665 buffer_info = &tx_ring->buffer_info[i]; 5666 e1000_put_txbuf(tx_ring, buffer_info, true); 5667 } 5668 5669 return 0; 5670 } 5671 5672 static void e1000_tx_queue(struct e1000_ring *tx_ring, int tx_flags, int count) 5673 { 5674 struct e1000_adapter *adapter = tx_ring->adapter; 5675 struct e1000_tx_desc *tx_desc = NULL; 5676 struct e1000_buffer *buffer_info; 5677 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS; 5678 unsigned int i; 5679 5680 if (tx_flags & E1000_TX_FLAGS_TSO) { 5681 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D | 5682 E1000_TXD_CMD_TSE; 5683 txd_upper |= E1000_TXD_POPTS_TXSM << 8; 5684 5685 if (tx_flags & E1000_TX_FLAGS_IPV4) 5686 txd_upper |= E1000_TXD_POPTS_IXSM << 8; 5687 } 5688 5689 if (tx_flags & E1000_TX_FLAGS_CSUM) { 5690 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; 5691 txd_upper |= E1000_TXD_POPTS_TXSM << 8; 5692 } 5693 5694 if (tx_flags & E1000_TX_FLAGS_VLAN) { 5695 txd_lower |= E1000_TXD_CMD_VLE; 5696 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK); 5697 } 5698 5699 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) 5700 txd_lower &= ~(E1000_TXD_CMD_IFCS); 5701 5702 if (unlikely(tx_flags & E1000_TX_FLAGS_HWTSTAMP)) { 5703 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; 5704 txd_upper |= E1000_TXD_EXTCMD_TSTAMP; 5705 } 5706 5707 i = tx_ring->next_to_use; 5708 5709 do { 5710 buffer_info = &tx_ring->buffer_info[i]; 5711 tx_desc = E1000_TX_DESC(*tx_ring, i); 5712 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 5713 tx_desc->lower.data = cpu_to_le32(txd_lower | 5714 buffer_info->length); 5715 tx_desc->upper.data = cpu_to_le32(txd_upper); 5716 5717 i++; 5718 if (i == tx_ring->count) 5719 i = 0; 5720 } while (--count > 0); 5721 5722 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd); 5723 5724 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */ 5725 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) 5726 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS)); 5727 5728 /* Force memory writes to complete before letting h/w 5729 * know there are new descriptors to fetch. (Only 5730 * applicable for weak-ordered memory model archs, 5731 * such as IA-64). 5732 */ 5733 wmb(); 5734 5735 tx_ring->next_to_use = i; 5736 } 5737 5738 #define MINIMUM_DHCP_PACKET_SIZE 282 5739 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter, 5740 struct sk_buff *skb) 5741 { 5742 struct e1000_hw *hw = &adapter->hw; 5743 u16 length, offset; 5744 5745 if (skb_vlan_tag_present(skb) && 5746 !((skb_vlan_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) && 5747 (adapter->hw.mng_cookie.status & 5748 E1000_MNG_DHCP_COOKIE_STATUS_VLAN))) 5749 return 0; 5750 5751 if (skb->len <= MINIMUM_DHCP_PACKET_SIZE) 5752 return 0; 5753 5754 if (((struct ethhdr *)skb->data)->h_proto != htons(ETH_P_IP)) 5755 return 0; 5756 5757 { 5758 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data + 14); 5759 struct udphdr *udp; 5760 5761 if (ip->protocol != IPPROTO_UDP) 5762 return 0; 5763 5764 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2)); 5765 if (ntohs(udp->dest) != 67) 5766 return 0; 5767 5768 offset = (u8 *)udp + 8 - skb->data; 5769 length = skb->len - offset; 5770 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length); 5771 } 5772 5773 return 0; 5774 } 5775 5776 static int __e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size) 5777 { 5778 struct e1000_adapter *adapter = tx_ring->adapter; 5779 5780 netif_stop_queue(adapter->netdev); 5781 /* Herbert's original patch had: 5782 * smp_mb__after_netif_stop_queue(); 5783 * but since that doesn't exist yet, just open code it. 5784 */ 5785 smp_mb(); 5786 5787 /* We need to check again in a case another CPU has just 5788 * made room available. 5789 */ 5790 if (e1000_desc_unused(tx_ring) < size) 5791 return -EBUSY; 5792 5793 /* A reprieve! */ 5794 netif_start_queue(adapter->netdev); 5795 ++adapter->restart_queue; 5796 return 0; 5797 } 5798 5799 static int e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size) 5800 { 5801 BUG_ON(size > tx_ring->count); 5802 5803 if (e1000_desc_unused(tx_ring) >= size) 5804 return 0; 5805 return __e1000_maybe_stop_tx(tx_ring, size); 5806 } 5807 5808 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, 5809 struct net_device *netdev) 5810 { 5811 struct e1000_adapter *adapter = netdev_priv(netdev); 5812 struct e1000_ring *tx_ring = adapter->tx_ring; 5813 unsigned int first; 5814 unsigned int tx_flags = 0; 5815 unsigned int len = skb_headlen(skb); 5816 unsigned int nr_frags; 5817 unsigned int mss; 5818 int count = 0; 5819 int tso; 5820 unsigned int f; 5821 __be16 protocol = vlan_get_protocol(skb); 5822 5823 if (test_bit(__E1000_DOWN, &adapter->state)) { 5824 dev_kfree_skb_any(skb); 5825 return NETDEV_TX_OK; 5826 } 5827 5828 if (skb->len <= 0) { 5829 dev_kfree_skb_any(skb); 5830 return NETDEV_TX_OK; 5831 } 5832 5833 /* The minimum packet size with TCTL.PSP set is 17 bytes so 5834 * pad skb in order to meet this minimum size requirement 5835 */ 5836 if (skb_put_padto(skb, 17)) 5837 return NETDEV_TX_OK; 5838 5839 mss = skb_shinfo(skb)->gso_size; 5840 if (mss) { 5841 u8 hdr_len; 5842 5843 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data 5844 * points to just header, pull a few bytes of payload from 5845 * frags into skb->data 5846 */ 5847 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 5848 /* we do this workaround for ES2LAN, but it is un-necessary, 5849 * avoiding it could save a lot of cycles 5850 */ 5851 if (skb->data_len && (hdr_len == len)) { 5852 unsigned int pull_size; 5853 5854 pull_size = min_t(unsigned int, 4, skb->data_len); 5855 if (!__pskb_pull_tail(skb, pull_size)) { 5856 e_err("__pskb_pull_tail failed.\n"); 5857 dev_kfree_skb_any(skb); 5858 return NETDEV_TX_OK; 5859 } 5860 len = skb_headlen(skb); 5861 } 5862 } 5863 5864 /* reserve a descriptor for the offload context */ 5865 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL)) 5866 count++; 5867 count++; 5868 5869 count += DIV_ROUND_UP(len, adapter->tx_fifo_limit); 5870 5871 nr_frags = skb_shinfo(skb)->nr_frags; 5872 for (f = 0; f < nr_frags; f++) 5873 count += DIV_ROUND_UP(skb_frag_size(&skb_shinfo(skb)->frags[f]), 5874 adapter->tx_fifo_limit); 5875 5876 if (adapter->hw.mac.tx_pkt_filtering) 5877 e1000_transfer_dhcp_info(adapter, skb); 5878 5879 /* need: count + 2 desc gap to keep tail from touching 5880 * head, otherwise try next time 5881 */ 5882 if (e1000_maybe_stop_tx(tx_ring, count + 2)) 5883 return NETDEV_TX_BUSY; 5884 5885 if (skb_vlan_tag_present(skb)) { 5886 tx_flags |= E1000_TX_FLAGS_VLAN; 5887 tx_flags |= (skb_vlan_tag_get(skb) << 5888 E1000_TX_FLAGS_VLAN_SHIFT); 5889 } 5890 5891 first = tx_ring->next_to_use; 5892 5893 tso = e1000_tso(tx_ring, skb, protocol); 5894 if (tso < 0) { 5895 dev_kfree_skb_any(skb); 5896 return NETDEV_TX_OK; 5897 } 5898 5899 if (tso) 5900 tx_flags |= E1000_TX_FLAGS_TSO; 5901 else if (e1000_tx_csum(tx_ring, skb, protocol)) 5902 tx_flags |= E1000_TX_FLAGS_CSUM; 5903 5904 /* Old method was to assume IPv4 packet by default if TSO was enabled. 5905 * 82571 hardware supports TSO capabilities for IPv6 as well... 5906 * no longer assume, we must. 5907 */ 5908 if (protocol == htons(ETH_P_IP)) 5909 tx_flags |= E1000_TX_FLAGS_IPV4; 5910 5911 if (unlikely(skb->no_fcs)) 5912 tx_flags |= E1000_TX_FLAGS_NO_FCS; 5913 5914 /* if count is 0 then mapping error has occurred */ 5915 count = e1000_tx_map(tx_ring, skb, first, adapter->tx_fifo_limit, 5916 nr_frags); 5917 if (count) { 5918 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && 5919 (adapter->flags & FLAG_HAS_HW_TIMESTAMP)) { 5920 if (!adapter->tx_hwtstamp_skb) { 5921 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 5922 tx_flags |= E1000_TX_FLAGS_HWTSTAMP; 5923 adapter->tx_hwtstamp_skb = skb_get(skb); 5924 adapter->tx_hwtstamp_start = jiffies; 5925 schedule_work(&adapter->tx_hwtstamp_work); 5926 } else { 5927 adapter->tx_hwtstamp_skipped++; 5928 } 5929 } 5930 5931 skb_tx_timestamp(skb); 5932 5933 netdev_sent_queue(netdev, skb->len); 5934 e1000_tx_queue(tx_ring, tx_flags, count); 5935 /* Make sure there is space in the ring for the next send. */ 5936 e1000_maybe_stop_tx(tx_ring, 5937 (MAX_SKB_FRAGS * 5938 DIV_ROUND_UP(PAGE_SIZE, 5939 adapter->tx_fifo_limit) + 2)); 5940 5941 if (!netdev_xmit_more() || 5942 netif_xmit_stopped(netdev_get_tx_queue(netdev, 0))) { 5943 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 5944 e1000e_update_tdt_wa(tx_ring, 5945 tx_ring->next_to_use); 5946 else 5947 writel(tx_ring->next_to_use, tx_ring->tail); 5948 } 5949 } else { 5950 dev_kfree_skb_any(skb); 5951 tx_ring->buffer_info[first].time_stamp = 0; 5952 tx_ring->next_to_use = first; 5953 } 5954 5955 return NETDEV_TX_OK; 5956 } 5957 5958 /** 5959 * e1000_tx_timeout - Respond to a Tx Hang 5960 * @netdev: network interface device structure 5961 * @txqueue: index of the hung queue (unused) 5962 **/ 5963 static void e1000_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue) 5964 { 5965 struct e1000_adapter *adapter = netdev_priv(netdev); 5966 5967 /* Do the reset outside of interrupt context */ 5968 adapter->tx_timeout_count++; 5969 schedule_work(&adapter->reset_task); 5970 } 5971 5972 static void e1000_reset_task(struct work_struct *work) 5973 { 5974 struct e1000_adapter *adapter; 5975 adapter = container_of(work, struct e1000_adapter, reset_task); 5976 5977 rtnl_lock(); 5978 /* don't run the task if already down */ 5979 if (test_bit(__E1000_DOWN, &adapter->state)) { 5980 rtnl_unlock(); 5981 return; 5982 } 5983 5984 if (!(adapter->flags & FLAG_RESTART_NOW)) { 5985 e1000e_dump(adapter); 5986 e_err("Reset adapter unexpectedly\n"); 5987 } 5988 e1000e_reinit_locked(adapter); 5989 rtnl_unlock(); 5990 } 5991 5992 /** 5993 * e1000_get_stats64 - Get System Network Statistics 5994 * @netdev: network interface device structure 5995 * @stats: rtnl_link_stats64 pointer 5996 * 5997 * Returns the address of the device statistics structure. 5998 **/ 5999 void e1000e_get_stats64(struct net_device *netdev, 6000 struct rtnl_link_stats64 *stats) 6001 { 6002 struct e1000_adapter *adapter = netdev_priv(netdev); 6003 6004 spin_lock(&adapter->stats64_lock); 6005 e1000e_update_stats(adapter); 6006 /* Fill out the OS statistics structure */ 6007 stats->rx_bytes = adapter->stats.gorc; 6008 stats->rx_packets = adapter->stats.gprc; 6009 stats->tx_bytes = adapter->stats.gotc; 6010 stats->tx_packets = adapter->stats.gptc; 6011 stats->multicast = adapter->stats.mprc; 6012 stats->collisions = adapter->stats.colc; 6013 6014 /* Rx Errors */ 6015 6016 /* RLEC on some newer hardware can be incorrect so build 6017 * our own version based on RUC and ROC 6018 */ 6019 stats->rx_errors = adapter->stats.rxerrc + 6020 adapter->stats.crcerrs + adapter->stats.algnerrc + 6021 adapter->stats.ruc + adapter->stats.roc + adapter->stats.cexterr; 6022 stats->rx_length_errors = adapter->stats.ruc + adapter->stats.roc; 6023 stats->rx_crc_errors = adapter->stats.crcerrs; 6024 stats->rx_frame_errors = adapter->stats.algnerrc; 6025 stats->rx_missed_errors = adapter->stats.mpc; 6026 6027 /* Tx Errors */ 6028 stats->tx_errors = adapter->stats.ecol + adapter->stats.latecol; 6029 stats->tx_aborted_errors = adapter->stats.ecol; 6030 stats->tx_window_errors = adapter->stats.latecol; 6031 stats->tx_carrier_errors = adapter->stats.tncrs; 6032 6033 /* Tx Dropped needs to be maintained elsewhere */ 6034 6035 spin_unlock(&adapter->stats64_lock); 6036 } 6037 6038 /** 6039 * e1000_change_mtu - Change the Maximum Transfer Unit 6040 * @netdev: network interface device structure 6041 * @new_mtu: new value for maximum frame size 6042 * 6043 * Returns 0 on success, negative on failure 6044 **/ 6045 static int e1000_change_mtu(struct net_device *netdev, int new_mtu) 6046 { 6047 struct e1000_adapter *adapter = netdev_priv(netdev); 6048 int max_frame = new_mtu + VLAN_ETH_HLEN + ETH_FCS_LEN; 6049 6050 /* Jumbo frame support */ 6051 if ((new_mtu > ETH_DATA_LEN) && 6052 !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) { 6053 e_err("Jumbo Frames not supported.\n"); 6054 return -EINVAL; 6055 } 6056 6057 /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */ 6058 if ((adapter->hw.mac.type >= e1000_pch2lan) && 6059 !(adapter->flags2 & FLAG2_CRC_STRIPPING) && 6060 (new_mtu > ETH_DATA_LEN)) { 6061 e_err("Jumbo Frames not supported on this device when CRC stripping is disabled.\n"); 6062 return -EINVAL; 6063 } 6064 6065 while (test_and_set_bit(__E1000_RESETTING, &adapter->state)) 6066 usleep_range(1000, 1100); 6067 /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */ 6068 adapter->max_frame_size = max_frame; 6069 netdev_dbg(netdev, "changing MTU from %d to %d\n", 6070 netdev->mtu, new_mtu); 6071 netdev->mtu = new_mtu; 6072 6073 pm_runtime_get_sync(netdev->dev.parent); 6074 6075 if (netif_running(netdev)) 6076 e1000e_down(adapter, true); 6077 6078 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN 6079 * means we reserve 2 more, this pushes us to allocate from the next 6080 * larger slab size. 6081 * i.e. RXBUFFER_2048 --> size-4096 slab 6082 * However with the new *_jumbo_rx* routines, jumbo receives will use 6083 * fragmented skbs 6084 */ 6085 6086 if (max_frame <= 2048) 6087 adapter->rx_buffer_len = 2048; 6088 else 6089 adapter->rx_buffer_len = 4096; 6090 6091 /* adjust allocation if LPE protects us, and we aren't using SBP */ 6092 if (max_frame <= (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)) 6093 adapter->rx_buffer_len = VLAN_ETH_FRAME_LEN + ETH_FCS_LEN; 6094 6095 if (netif_running(netdev)) 6096 e1000e_up(adapter); 6097 else 6098 e1000e_reset(adapter); 6099 6100 pm_runtime_put_sync(netdev->dev.parent); 6101 6102 clear_bit(__E1000_RESETTING, &adapter->state); 6103 6104 return 0; 6105 } 6106 6107 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, 6108 int cmd) 6109 { 6110 struct e1000_adapter *adapter = netdev_priv(netdev); 6111 struct mii_ioctl_data *data = if_mii(ifr); 6112 6113 if (adapter->hw.phy.media_type != e1000_media_type_copper) 6114 return -EOPNOTSUPP; 6115 6116 switch (cmd) { 6117 case SIOCGMIIPHY: 6118 data->phy_id = adapter->hw.phy.addr; 6119 break; 6120 case SIOCGMIIREG: 6121 e1000_phy_read_status(adapter); 6122 6123 switch (data->reg_num & 0x1F) { 6124 case MII_BMCR: 6125 data->val_out = adapter->phy_regs.bmcr; 6126 break; 6127 case MII_BMSR: 6128 data->val_out = adapter->phy_regs.bmsr; 6129 break; 6130 case MII_PHYSID1: 6131 data->val_out = (adapter->hw.phy.id >> 16); 6132 break; 6133 case MII_PHYSID2: 6134 data->val_out = (adapter->hw.phy.id & 0xFFFF); 6135 break; 6136 case MII_ADVERTISE: 6137 data->val_out = adapter->phy_regs.advertise; 6138 break; 6139 case MII_LPA: 6140 data->val_out = adapter->phy_regs.lpa; 6141 break; 6142 case MII_EXPANSION: 6143 data->val_out = adapter->phy_regs.expansion; 6144 break; 6145 case MII_CTRL1000: 6146 data->val_out = adapter->phy_regs.ctrl1000; 6147 break; 6148 case MII_STAT1000: 6149 data->val_out = adapter->phy_regs.stat1000; 6150 break; 6151 case MII_ESTATUS: 6152 data->val_out = adapter->phy_regs.estatus; 6153 break; 6154 default: 6155 return -EIO; 6156 } 6157 break; 6158 case SIOCSMIIREG: 6159 default: 6160 return -EOPNOTSUPP; 6161 } 6162 return 0; 6163 } 6164 6165 /** 6166 * e1000e_hwtstamp_ioctl - control hardware time stamping 6167 * @netdev: network interface device structure 6168 * @ifr: interface request 6169 * 6170 * Outgoing time stamping can be enabled and disabled. Play nice and 6171 * disable it when requested, although it shouldn't cause any overhead 6172 * when no packet needs it. At most one packet in the queue may be 6173 * marked for time stamping, otherwise it would be impossible to tell 6174 * for sure to which packet the hardware time stamp belongs. 6175 * 6176 * Incoming time stamping has to be configured via the hardware filters. 6177 * Not all combinations are supported, in particular event type has to be 6178 * specified. Matching the kind of event packet is not supported, with the 6179 * exception of "all V2 events regardless of level 2 or 4". 6180 **/ 6181 static int e1000e_hwtstamp_set(struct net_device *netdev, struct ifreq *ifr) 6182 { 6183 struct e1000_adapter *adapter = netdev_priv(netdev); 6184 struct hwtstamp_config config; 6185 int ret_val; 6186 6187 if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) 6188 return -EFAULT; 6189 6190 ret_val = e1000e_config_hwtstamp(adapter, &config); 6191 if (ret_val) 6192 return ret_val; 6193 6194 switch (config.rx_filter) { 6195 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 6196 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 6197 case HWTSTAMP_FILTER_PTP_V2_SYNC: 6198 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 6199 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 6200 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 6201 /* With V2 type filters which specify a Sync or Delay Request, 6202 * Path Delay Request/Response messages are also time stamped 6203 * by hardware so notify the caller the requested packets plus 6204 * some others are time stamped. 6205 */ 6206 config.rx_filter = HWTSTAMP_FILTER_SOME; 6207 break; 6208 default: 6209 break; 6210 } 6211 6212 return copy_to_user(ifr->ifr_data, &config, 6213 sizeof(config)) ? -EFAULT : 0; 6214 } 6215 6216 static int e1000e_hwtstamp_get(struct net_device *netdev, struct ifreq *ifr) 6217 { 6218 struct e1000_adapter *adapter = netdev_priv(netdev); 6219 6220 return copy_to_user(ifr->ifr_data, &adapter->hwtstamp_config, 6221 sizeof(adapter->hwtstamp_config)) ? -EFAULT : 0; 6222 } 6223 6224 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 6225 { 6226 switch (cmd) { 6227 case SIOCGMIIPHY: 6228 case SIOCGMIIREG: 6229 case SIOCSMIIREG: 6230 return e1000_mii_ioctl(netdev, ifr, cmd); 6231 case SIOCSHWTSTAMP: 6232 return e1000e_hwtstamp_set(netdev, ifr); 6233 case SIOCGHWTSTAMP: 6234 return e1000e_hwtstamp_get(netdev, ifr); 6235 default: 6236 return -EOPNOTSUPP; 6237 } 6238 } 6239 6240 static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc) 6241 { 6242 struct e1000_hw *hw = &adapter->hw; 6243 u32 i, mac_reg, wuc; 6244 u16 phy_reg, wuc_enable; 6245 int retval; 6246 6247 /* copy MAC RARs to PHY RARs */ 6248 e1000_copy_rx_addrs_to_phy_ich8lan(hw); 6249 6250 retval = hw->phy.ops.acquire(hw); 6251 if (retval) { 6252 e_err("Could not acquire PHY\n"); 6253 return retval; 6254 } 6255 6256 /* Enable access to wakeup registers on and set page to BM_WUC_PAGE */ 6257 retval = e1000_enable_phy_wakeup_reg_access_bm(hw, &wuc_enable); 6258 if (retval) 6259 goto release; 6260 6261 /* copy MAC MTA to PHY MTA - only needed for pchlan */ 6262 for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) { 6263 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i); 6264 hw->phy.ops.write_reg_page(hw, BM_MTA(i), 6265 (u16)(mac_reg & 0xFFFF)); 6266 hw->phy.ops.write_reg_page(hw, BM_MTA(i) + 1, 6267 (u16)((mac_reg >> 16) & 0xFFFF)); 6268 } 6269 6270 /* configure PHY Rx Control register */ 6271 hw->phy.ops.read_reg_page(&adapter->hw, BM_RCTL, &phy_reg); 6272 mac_reg = er32(RCTL); 6273 if (mac_reg & E1000_RCTL_UPE) 6274 phy_reg |= BM_RCTL_UPE; 6275 if (mac_reg & E1000_RCTL_MPE) 6276 phy_reg |= BM_RCTL_MPE; 6277 phy_reg &= ~(BM_RCTL_MO_MASK); 6278 if (mac_reg & E1000_RCTL_MO_3) 6279 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT) 6280 << BM_RCTL_MO_SHIFT); 6281 if (mac_reg & E1000_RCTL_BAM) 6282 phy_reg |= BM_RCTL_BAM; 6283 if (mac_reg & E1000_RCTL_PMCF) 6284 phy_reg |= BM_RCTL_PMCF; 6285 mac_reg = er32(CTRL); 6286 if (mac_reg & E1000_CTRL_RFCE) 6287 phy_reg |= BM_RCTL_RFCE; 6288 hw->phy.ops.write_reg_page(&adapter->hw, BM_RCTL, phy_reg); 6289 6290 wuc = E1000_WUC_PME_EN; 6291 if (wufc & (E1000_WUFC_MAG | E1000_WUFC_LNKC)) 6292 wuc |= E1000_WUC_APME; 6293 6294 /* enable PHY wakeup in MAC register */ 6295 ew32(WUFC, wufc); 6296 ew32(WUC, (E1000_WUC_PHY_WAKE | E1000_WUC_APMPME | 6297 E1000_WUC_PME_STATUS | wuc)); 6298 6299 /* configure and enable PHY wakeup in PHY registers */ 6300 hw->phy.ops.write_reg_page(&adapter->hw, BM_WUFC, wufc); 6301 hw->phy.ops.write_reg_page(&adapter->hw, BM_WUC, wuc); 6302 6303 /* activate PHY wakeup */ 6304 wuc_enable |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT; 6305 retval = e1000_disable_phy_wakeup_reg_access_bm(hw, &wuc_enable); 6306 if (retval) 6307 e_err("Could not set PHY Host Wakeup bit\n"); 6308 release: 6309 hw->phy.ops.release(hw); 6310 6311 return retval; 6312 } 6313 6314 static void e1000e_flush_lpic(struct pci_dev *pdev) 6315 { 6316 struct net_device *netdev = pci_get_drvdata(pdev); 6317 struct e1000_adapter *adapter = netdev_priv(netdev); 6318 struct e1000_hw *hw = &adapter->hw; 6319 u32 ret_val; 6320 6321 pm_runtime_get_sync(netdev->dev.parent); 6322 6323 ret_val = hw->phy.ops.acquire(hw); 6324 if (ret_val) 6325 goto fl_out; 6326 6327 pr_info("EEE TX LPI TIMER: %08X\n", 6328 er32(LPIC) >> E1000_LPIC_LPIET_SHIFT); 6329 6330 hw->phy.ops.release(hw); 6331 6332 fl_out: 6333 pm_runtime_put_sync(netdev->dev.parent); 6334 } 6335 6336 /* S0ix implementation */ 6337 static void e1000e_s0ix_entry_flow(struct e1000_adapter *adapter) 6338 { 6339 struct e1000_hw *hw = &adapter->hw; 6340 u32 mac_data; 6341 u16 phy_data; 6342 6343 /* Disable the periodic inband message, 6344 * don't request PCIe clock in K1 page770_17[10:9] = 10b 6345 */ 6346 e1e_rphy(hw, HV_PM_CTRL, &phy_data); 6347 phy_data &= ~HV_PM_CTRL_K1_CLK_REQ; 6348 phy_data |= BIT(10); 6349 e1e_wphy(hw, HV_PM_CTRL, phy_data); 6350 6351 /* Make sure we don't exit K1 every time a new packet arrives 6352 * 772_29[5] = 1 CS_Mode_Stay_In_K1 6353 */ 6354 e1e_rphy(hw, I217_CGFREG, &phy_data); 6355 phy_data |= BIT(5); 6356 e1e_wphy(hw, I217_CGFREG, phy_data); 6357 6358 /* Change the MAC/PHY interface to SMBus 6359 * Force the SMBus in PHY page769_23[0] = 1 6360 * Force the SMBus in MAC CTRL_EXT[11] = 1 6361 */ 6362 e1e_rphy(hw, CV_SMB_CTRL, &phy_data); 6363 phy_data |= CV_SMB_CTRL_FORCE_SMBUS; 6364 e1e_wphy(hw, CV_SMB_CTRL, phy_data); 6365 mac_data = er32(CTRL_EXT); 6366 mac_data |= E1000_CTRL_EXT_FORCE_SMBUS; 6367 ew32(CTRL_EXT, mac_data); 6368 6369 /* DFT control: PHY bit: page769_20[0] = 1 6370 * Gate PPW via EXTCNF_CTRL - set 0x0F00[7] = 1 6371 */ 6372 e1e_rphy(hw, I82579_DFT_CTRL, &phy_data); 6373 phy_data |= BIT(0); 6374 e1e_wphy(hw, I82579_DFT_CTRL, phy_data); 6375 6376 mac_data = er32(EXTCNF_CTRL); 6377 mac_data |= E1000_EXTCNF_CTRL_GATE_PHY_CFG; 6378 ew32(EXTCNF_CTRL, mac_data); 6379 6380 /* Check MAC Tx/Rx packet buffer pointers. 6381 * Reset MAC Tx/Rx packet buffer pointers to suppress any 6382 * pending traffic indication that would prevent power gating. 6383 */ 6384 mac_data = er32(TDFH); 6385 if (mac_data) 6386 ew32(TDFH, 0); 6387 mac_data = er32(TDFT); 6388 if (mac_data) 6389 ew32(TDFT, 0); 6390 mac_data = er32(TDFHS); 6391 if (mac_data) 6392 ew32(TDFHS, 0); 6393 mac_data = er32(TDFTS); 6394 if (mac_data) 6395 ew32(TDFTS, 0); 6396 mac_data = er32(TDFPC); 6397 if (mac_data) 6398 ew32(TDFPC, 0); 6399 mac_data = er32(RDFH); 6400 if (mac_data) 6401 ew32(RDFH, 0); 6402 mac_data = er32(RDFT); 6403 if (mac_data) 6404 ew32(RDFT, 0); 6405 mac_data = er32(RDFHS); 6406 if (mac_data) 6407 ew32(RDFHS, 0); 6408 mac_data = er32(RDFTS); 6409 if (mac_data) 6410 ew32(RDFTS, 0); 6411 mac_data = er32(RDFPC); 6412 if (mac_data) 6413 ew32(RDFPC, 0); 6414 6415 /* Enable the Dynamic Power Gating in the MAC */ 6416 mac_data = er32(FEXTNVM7); 6417 mac_data |= BIT(22); 6418 ew32(FEXTNVM7, mac_data); 6419 6420 /* Disable the time synchronization clock */ 6421 mac_data = er32(FEXTNVM7); 6422 mac_data |= BIT(31); 6423 mac_data &= ~BIT(0); 6424 ew32(FEXTNVM7, mac_data); 6425 6426 /* Dynamic Power Gating Enable */ 6427 mac_data = er32(CTRL_EXT); 6428 mac_data |= BIT(3); 6429 ew32(CTRL_EXT, mac_data); 6430 6431 /* Disable disconnected cable conditioning for Power Gating */ 6432 mac_data = er32(DPGFR); 6433 mac_data |= BIT(2); 6434 ew32(DPGFR, mac_data); 6435 6436 /* Don't wake from dynamic Power Gating with clock request */ 6437 mac_data = er32(FEXTNVM12); 6438 mac_data |= BIT(12); 6439 ew32(FEXTNVM12, mac_data); 6440 6441 /* Ungate PGCB clock */ 6442 mac_data = er32(FEXTNVM9); 6443 mac_data &= ~BIT(28); 6444 ew32(FEXTNVM9, mac_data); 6445 6446 /* Enable K1 off to enable mPHY Power Gating */ 6447 mac_data = er32(FEXTNVM6); 6448 mac_data |= BIT(31); 6449 ew32(FEXTNVM6, mac_data); 6450 6451 /* Enable mPHY power gating for any link and speed */ 6452 mac_data = er32(FEXTNVM8); 6453 mac_data |= BIT(9); 6454 ew32(FEXTNVM8, mac_data); 6455 6456 /* Enable the Dynamic Clock Gating in the DMA and MAC */ 6457 mac_data = er32(CTRL_EXT); 6458 mac_data |= E1000_CTRL_EXT_DMA_DYN_CLK_EN; 6459 ew32(CTRL_EXT, mac_data); 6460 6461 /* No MAC DPG gating SLP_S0 in modern standby 6462 * Switch the logic of the lanphypc to use PMC counter 6463 */ 6464 mac_data = er32(FEXTNVM5); 6465 mac_data |= BIT(7); 6466 ew32(FEXTNVM5, mac_data); 6467 } 6468 6469 static void e1000e_s0ix_exit_flow(struct e1000_adapter *adapter) 6470 { 6471 struct e1000_hw *hw = &adapter->hw; 6472 u32 mac_data; 6473 u16 phy_data; 6474 6475 /* Disable the Dynamic Power Gating in the MAC */ 6476 mac_data = er32(FEXTNVM7); 6477 mac_data &= 0xFFBFFFFF; 6478 ew32(FEXTNVM7, mac_data); 6479 6480 /* Enable the time synchronization clock */ 6481 mac_data = er32(FEXTNVM7); 6482 mac_data |= BIT(0); 6483 ew32(FEXTNVM7, mac_data); 6484 6485 /* Disable mPHY power gating for any link and speed */ 6486 mac_data = er32(FEXTNVM8); 6487 mac_data &= ~BIT(9); 6488 ew32(FEXTNVM8, mac_data); 6489 6490 /* Disable K1 off */ 6491 mac_data = er32(FEXTNVM6); 6492 mac_data &= ~BIT(31); 6493 ew32(FEXTNVM6, mac_data); 6494 6495 /* Disable Ungate PGCB clock */ 6496 mac_data = er32(FEXTNVM9); 6497 mac_data |= BIT(28); 6498 ew32(FEXTNVM9, mac_data); 6499 6500 /* Cancel not waking from dynamic 6501 * Power Gating with clock request 6502 */ 6503 mac_data = er32(FEXTNVM12); 6504 mac_data &= ~BIT(12); 6505 ew32(FEXTNVM12, mac_data); 6506 6507 /* Cancel disable disconnected cable conditioning 6508 * for Power Gating 6509 */ 6510 mac_data = er32(DPGFR); 6511 mac_data &= ~BIT(2); 6512 ew32(DPGFR, mac_data); 6513 6514 /* Disable Dynamic Power Gating */ 6515 mac_data = er32(CTRL_EXT); 6516 mac_data &= 0xFFFFFFF7; 6517 ew32(CTRL_EXT, mac_data); 6518 6519 /* Disable the Dynamic Clock Gating in the DMA and MAC */ 6520 mac_data = er32(CTRL_EXT); 6521 mac_data &= 0xFFF7FFFF; 6522 ew32(CTRL_EXT, mac_data); 6523 6524 /* Revert the lanphypc logic to use the internal Gbe counter 6525 * and not the PMC counter 6526 */ 6527 mac_data = er32(FEXTNVM5); 6528 mac_data &= 0xFFFFFF7F; 6529 ew32(FEXTNVM5, mac_data); 6530 6531 /* Enable the periodic inband message, 6532 * Request PCIe clock in K1 page770_17[10:9] =01b 6533 */ 6534 e1e_rphy(hw, HV_PM_CTRL, &phy_data); 6535 phy_data &= 0xFBFF; 6536 phy_data |= HV_PM_CTRL_K1_CLK_REQ; 6537 e1e_wphy(hw, HV_PM_CTRL, phy_data); 6538 6539 /* Return back configuration 6540 * 772_29[5] = 0 CS_Mode_Stay_In_K1 6541 */ 6542 e1e_rphy(hw, I217_CGFREG, &phy_data); 6543 phy_data &= 0xFFDF; 6544 e1e_wphy(hw, I217_CGFREG, phy_data); 6545 6546 /* Change the MAC/PHY interface to Kumeran 6547 * Unforce the SMBus in PHY page769_23[0] = 0 6548 * Unforce the SMBus in MAC CTRL_EXT[11] = 0 6549 */ 6550 e1e_rphy(hw, CV_SMB_CTRL, &phy_data); 6551 phy_data &= ~CV_SMB_CTRL_FORCE_SMBUS; 6552 e1e_wphy(hw, CV_SMB_CTRL, phy_data); 6553 mac_data = er32(CTRL_EXT); 6554 mac_data &= ~E1000_CTRL_EXT_FORCE_SMBUS; 6555 ew32(CTRL_EXT, mac_data); 6556 } 6557 6558 static int e1000e_pm_freeze(struct device *dev) 6559 { 6560 struct net_device *netdev = dev_get_drvdata(dev); 6561 struct e1000_adapter *adapter = netdev_priv(netdev); 6562 bool present; 6563 6564 rtnl_lock(); 6565 6566 present = netif_device_present(netdev); 6567 netif_device_detach(netdev); 6568 6569 if (present && netif_running(netdev)) { 6570 int count = E1000_CHECK_RESET_COUNT; 6571 6572 while (test_bit(__E1000_RESETTING, &adapter->state) && count--) 6573 usleep_range(10000, 11000); 6574 6575 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state)); 6576 6577 /* Quiesce the device without resetting the hardware */ 6578 e1000e_down(adapter, false); 6579 e1000_free_irq(adapter); 6580 } 6581 rtnl_unlock(); 6582 6583 e1000e_reset_interrupt_capability(adapter); 6584 6585 /* Allow time for pending master requests to run */ 6586 e1000e_disable_pcie_master(&adapter->hw); 6587 6588 return 0; 6589 } 6590 6591 static int __e1000_shutdown(struct pci_dev *pdev, bool runtime) 6592 { 6593 struct net_device *netdev = pci_get_drvdata(pdev); 6594 struct e1000_adapter *adapter = netdev_priv(netdev); 6595 struct e1000_hw *hw = &adapter->hw; 6596 u32 ctrl, ctrl_ext, rctl, status, wufc; 6597 int retval = 0; 6598 6599 /* Runtime suspend should only enable wakeup for link changes */ 6600 if (runtime) 6601 wufc = E1000_WUFC_LNKC; 6602 else if (device_may_wakeup(&pdev->dev)) 6603 wufc = adapter->wol; 6604 else 6605 wufc = 0; 6606 6607 status = er32(STATUS); 6608 if (status & E1000_STATUS_LU) 6609 wufc &= ~E1000_WUFC_LNKC; 6610 6611 if (wufc) { 6612 e1000_setup_rctl(adapter); 6613 e1000e_set_rx_mode(netdev); 6614 6615 /* turn on all-multi mode if wake on multicast is enabled */ 6616 if (wufc & E1000_WUFC_MC) { 6617 rctl = er32(RCTL); 6618 rctl |= E1000_RCTL_MPE; 6619 ew32(RCTL, rctl); 6620 } 6621 6622 ctrl = er32(CTRL); 6623 ctrl |= E1000_CTRL_ADVD3WUC; 6624 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP)) 6625 ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT; 6626 ew32(CTRL, ctrl); 6627 6628 if (adapter->hw.phy.media_type == e1000_media_type_fiber || 6629 adapter->hw.phy.media_type == 6630 e1000_media_type_internal_serdes) { 6631 /* keep the laser running in D3 */ 6632 ctrl_ext = er32(CTRL_EXT); 6633 ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA; 6634 ew32(CTRL_EXT, ctrl_ext); 6635 } 6636 6637 if (!runtime) 6638 e1000e_power_up_phy(adapter); 6639 6640 if (adapter->flags & FLAG_IS_ICH) 6641 e1000_suspend_workarounds_ich8lan(&adapter->hw); 6642 6643 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) { 6644 /* enable wakeup by the PHY */ 6645 retval = e1000_init_phy_wakeup(adapter, wufc); 6646 if (retval) 6647 return retval; 6648 } else { 6649 /* enable wakeup by the MAC */ 6650 ew32(WUFC, wufc); 6651 ew32(WUC, E1000_WUC_PME_EN); 6652 } 6653 } else { 6654 ew32(WUC, 0); 6655 ew32(WUFC, 0); 6656 6657 e1000_power_down_phy(adapter); 6658 } 6659 6660 if (adapter->hw.phy.type == e1000_phy_igp_3) { 6661 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw); 6662 } else if (hw->mac.type >= e1000_pch_lpt) { 6663 if (wufc && !(wufc & (E1000_WUFC_EX | E1000_WUFC_MC | E1000_WUFC_BC))) 6664 /* ULP does not support wake from unicast, multicast 6665 * or broadcast. 6666 */ 6667 retval = e1000_enable_ulp_lpt_lp(hw, !runtime); 6668 6669 if (retval) 6670 return retval; 6671 } 6672 6673 /* Ensure that the appropriate bits are set in LPI_CTRL 6674 * for EEE in Sx 6675 */ 6676 if ((hw->phy.type >= e1000_phy_i217) && 6677 adapter->eee_advert && hw->dev_spec.ich8lan.eee_lp_ability) { 6678 u16 lpi_ctrl = 0; 6679 6680 retval = hw->phy.ops.acquire(hw); 6681 if (!retval) { 6682 retval = e1e_rphy_locked(hw, I82579_LPI_CTRL, 6683 &lpi_ctrl); 6684 if (!retval) { 6685 if (adapter->eee_advert & 6686 hw->dev_spec.ich8lan.eee_lp_ability & 6687 I82579_EEE_100_SUPPORTED) 6688 lpi_ctrl |= I82579_LPI_CTRL_100_ENABLE; 6689 if (adapter->eee_advert & 6690 hw->dev_spec.ich8lan.eee_lp_ability & 6691 I82579_EEE_1000_SUPPORTED) 6692 lpi_ctrl |= I82579_LPI_CTRL_1000_ENABLE; 6693 6694 retval = e1e_wphy_locked(hw, I82579_LPI_CTRL, 6695 lpi_ctrl); 6696 } 6697 } 6698 hw->phy.ops.release(hw); 6699 } 6700 6701 /* Release control of h/w to f/w. If f/w is AMT enabled, this 6702 * would have already happened in close and is redundant. 6703 */ 6704 e1000e_release_hw_control(adapter); 6705 6706 pci_clear_master(pdev); 6707 6708 /* The pci-e switch on some quad port adapters will report a 6709 * correctable error when the MAC transitions from D0 to D3. To 6710 * prevent this we need to mask off the correctable errors on the 6711 * downstream port of the pci-e switch. 6712 * 6713 * We don't have the associated upstream bridge while assigning 6714 * the PCI device into guest. For example, the KVM on power is 6715 * one of the cases. 6716 */ 6717 if (adapter->flags & FLAG_IS_QUAD_PORT) { 6718 struct pci_dev *us_dev = pdev->bus->self; 6719 u16 devctl; 6720 6721 if (!us_dev) 6722 return 0; 6723 6724 pcie_capability_read_word(us_dev, PCI_EXP_DEVCTL, &devctl); 6725 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL, 6726 (devctl & ~PCI_EXP_DEVCTL_CERE)); 6727 6728 pci_save_state(pdev); 6729 pci_prepare_to_sleep(pdev); 6730 6731 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL, devctl); 6732 } 6733 6734 return 0; 6735 } 6736 6737 /** 6738 * __e1000e_disable_aspm - Disable ASPM states 6739 * @pdev: pointer to PCI device struct 6740 * @state: bit-mask of ASPM states to disable 6741 * @locked: indication if this context holds pci_bus_sem locked. 6742 * 6743 * Some devices *must* have certain ASPM states disabled per hardware errata. 6744 **/ 6745 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state, int locked) 6746 { 6747 struct pci_dev *parent = pdev->bus->self; 6748 u16 aspm_dis_mask = 0; 6749 u16 pdev_aspmc, parent_aspmc; 6750 6751 switch (state) { 6752 case PCIE_LINK_STATE_L0S: 6753 case PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1: 6754 aspm_dis_mask |= PCI_EXP_LNKCTL_ASPM_L0S; 6755 fallthrough; /* can't have L1 without L0s */ 6756 case PCIE_LINK_STATE_L1: 6757 aspm_dis_mask |= PCI_EXP_LNKCTL_ASPM_L1; 6758 break; 6759 default: 6760 return; 6761 } 6762 6763 pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &pdev_aspmc); 6764 pdev_aspmc &= PCI_EXP_LNKCTL_ASPMC; 6765 6766 if (parent) { 6767 pcie_capability_read_word(parent, PCI_EXP_LNKCTL, 6768 &parent_aspmc); 6769 parent_aspmc &= PCI_EXP_LNKCTL_ASPMC; 6770 } 6771 6772 /* Nothing to do if the ASPM states to be disabled already are */ 6773 if (!(pdev_aspmc & aspm_dis_mask) && 6774 (!parent || !(parent_aspmc & aspm_dis_mask))) 6775 return; 6776 6777 dev_info(&pdev->dev, "Disabling ASPM %s %s\n", 6778 (aspm_dis_mask & pdev_aspmc & PCI_EXP_LNKCTL_ASPM_L0S) ? 6779 "L0s" : "", 6780 (aspm_dis_mask & pdev_aspmc & PCI_EXP_LNKCTL_ASPM_L1) ? 6781 "L1" : ""); 6782 6783 #ifdef CONFIG_PCIEASPM 6784 if (locked) 6785 pci_disable_link_state_locked(pdev, state); 6786 else 6787 pci_disable_link_state(pdev, state); 6788 6789 /* Double-check ASPM control. If not disabled by the above, the 6790 * BIOS is preventing that from happening (or CONFIG_PCIEASPM is 6791 * not enabled); override by writing PCI config space directly. 6792 */ 6793 pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &pdev_aspmc); 6794 pdev_aspmc &= PCI_EXP_LNKCTL_ASPMC; 6795 6796 if (!(aspm_dis_mask & pdev_aspmc)) 6797 return; 6798 #endif 6799 6800 /* Both device and parent should have the same ASPM setting. 6801 * Disable ASPM in downstream component first and then upstream. 6802 */ 6803 pcie_capability_clear_word(pdev, PCI_EXP_LNKCTL, aspm_dis_mask); 6804 6805 if (parent) 6806 pcie_capability_clear_word(parent, PCI_EXP_LNKCTL, 6807 aspm_dis_mask); 6808 } 6809 6810 /** 6811 * e1000e_disable_aspm - Disable ASPM states. 6812 * @pdev: pointer to PCI device struct 6813 * @state: bit-mask of ASPM states to disable 6814 * 6815 * This function acquires the pci_bus_sem! 6816 * Some devices *must* have certain ASPM states disabled per hardware errata. 6817 **/ 6818 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state) 6819 { 6820 __e1000e_disable_aspm(pdev, state, 0); 6821 } 6822 6823 /** 6824 * e1000e_disable_aspm_locked Disable ASPM states. 6825 * @pdev: pointer to PCI device struct 6826 * @state: bit-mask of ASPM states to disable 6827 * 6828 * This function must be called with pci_bus_sem acquired! 6829 * Some devices *must* have certain ASPM states disabled per hardware errata. 6830 **/ 6831 static void e1000e_disable_aspm_locked(struct pci_dev *pdev, u16 state) 6832 { 6833 __e1000e_disable_aspm(pdev, state, 1); 6834 } 6835 6836 static int e1000e_pm_thaw(struct device *dev) 6837 { 6838 struct net_device *netdev = dev_get_drvdata(dev); 6839 struct e1000_adapter *adapter = netdev_priv(netdev); 6840 int rc = 0; 6841 6842 e1000e_set_interrupt_capability(adapter); 6843 6844 rtnl_lock(); 6845 if (netif_running(netdev)) { 6846 rc = e1000_request_irq(adapter); 6847 if (rc) 6848 goto err_irq; 6849 6850 e1000e_up(adapter); 6851 } 6852 6853 netif_device_attach(netdev); 6854 err_irq: 6855 rtnl_unlock(); 6856 6857 return rc; 6858 } 6859 6860 static int __e1000_resume(struct pci_dev *pdev) 6861 { 6862 struct net_device *netdev = pci_get_drvdata(pdev); 6863 struct e1000_adapter *adapter = netdev_priv(netdev); 6864 struct e1000_hw *hw = &adapter->hw; 6865 u16 aspm_disable_flag = 0; 6866 6867 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S) 6868 aspm_disable_flag = PCIE_LINK_STATE_L0S; 6869 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1) 6870 aspm_disable_flag |= PCIE_LINK_STATE_L1; 6871 if (aspm_disable_flag) 6872 e1000e_disable_aspm(pdev, aspm_disable_flag); 6873 6874 pci_set_master(pdev); 6875 6876 if (hw->mac.type >= e1000_pch2lan) 6877 e1000_resume_workarounds_pchlan(&adapter->hw); 6878 6879 e1000e_power_up_phy(adapter); 6880 6881 /* report the system wakeup cause from S3/S4 */ 6882 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) { 6883 u16 phy_data; 6884 6885 e1e_rphy(&adapter->hw, BM_WUS, &phy_data); 6886 if (phy_data) { 6887 e_info("PHY Wakeup cause - %s\n", 6888 phy_data & E1000_WUS_EX ? "Unicast Packet" : 6889 phy_data & E1000_WUS_MC ? "Multicast Packet" : 6890 phy_data & E1000_WUS_BC ? "Broadcast Packet" : 6891 phy_data & E1000_WUS_MAG ? "Magic Packet" : 6892 phy_data & E1000_WUS_LNKC ? 6893 "Link Status Change" : "other"); 6894 } 6895 e1e_wphy(&adapter->hw, BM_WUS, ~0); 6896 } else { 6897 u32 wus = er32(WUS); 6898 6899 if (wus) { 6900 e_info("MAC Wakeup cause - %s\n", 6901 wus & E1000_WUS_EX ? "Unicast Packet" : 6902 wus & E1000_WUS_MC ? "Multicast Packet" : 6903 wus & E1000_WUS_BC ? "Broadcast Packet" : 6904 wus & E1000_WUS_MAG ? "Magic Packet" : 6905 wus & E1000_WUS_LNKC ? "Link Status Change" : 6906 "other"); 6907 } 6908 ew32(WUS, ~0); 6909 } 6910 6911 e1000e_reset(adapter); 6912 6913 e1000_init_manageability_pt(adapter); 6914 6915 /* If the controller has AMT, do not set DRV_LOAD until the interface 6916 * is up. For all other cases, let the f/w know that the h/w is now 6917 * under the control of the driver. 6918 */ 6919 if (!(adapter->flags & FLAG_HAS_AMT)) 6920 e1000e_get_hw_control(adapter); 6921 6922 return 0; 6923 } 6924 6925 static __maybe_unused int e1000e_pm_suspend(struct device *dev) 6926 { 6927 struct net_device *netdev = pci_get_drvdata(to_pci_dev(dev)); 6928 struct e1000_adapter *adapter = netdev_priv(netdev); 6929 struct pci_dev *pdev = to_pci_dev(dev); 6930 int rc; 6931 6932 e1000e_flush_lpic(pdev); 6933 6934 e1000e_pm_freeze(dev); 6935 6936 rc = __e1000_shutdown(pdev, false); 6937 if (rc) { 6938 e1000e_pm_thaw(dev); 6939 } else { 6940 /* Introduce S0ix implementation */ 6941 if (adapter->flags2 & FLAG2_ENABLE_S0IX_FLOWS) 6942 e1000e_s0ix_entry_flow(adapter); 6943 } 6944 6945 return rc; 6946 } 6947 6948 static __maybe_unused int e1000e_pm_resume(struct device *dev) 6949 { 6950 struct net_device *netdev = pci_get_drvdata(to_pci_dev(dev)); 6951 struct e1000_adapter *adapter = netdev_priv(netdev); 6952 struct pci_dev *pdev = to_pci_dev(dev); 6953 int rc; 6954 6955 /* Introduce S0ix implementation */ 6956 if (adapter->flags2 & FLAG2_ENABLE_S0IX_FLOWS) 6957 e1000e_s0ix_exit_flow(adapter); 6958 6959 rc = __e1000_resume(pdev); 6960 if (rc) 6961 return rc; 6962 6963 return e1000e_pm_thaw(dev); 6964 } 6965 6966 static __maybe_unused int e1000e_pm_runtime_idle(struct device *dev) 6967 { 6968 struct net_device *netdev = dev_get_drvdata(dev); 6969 struct e1000_adapter *adapter = netdev_priv(netdev); 6970 u16 eee_lp; 6971 6972 eee_lp = adapter->hw.dev_spec.ich8lan.eee_lp_ability; 6973 6974 if (!e1000e_has_link(adapter)) { 6975 adapter->hw.dev_spec.ich8lan.eee_lp_ability = eee_lp; 6976 pm_schedule_suspend(dev, 5 * MSEC_PER_SEC); 6977 } 6978 6979 return -EBUSY; 6980 } 6981 6982 static __maybe_unused int e1000e_pm_runtime_resume(struct device *dev) 6983 { 6984 struct pci_dev *pdev = to_pci_dev(dev); 6985 struct net_device *netdev = pci_get_drvdata(pdev); 6986 struct e1000_adapter *adapter = netdev_priv(netdev); 6987 int rc; 6988 6989 rc = __e1000_resume(pdev); 6990 if (rc) 6991 return rc; 6992 6993 if (netdev->flags & IFF_UP) 6994 e1000e_up(adapter); 6995 6996 return rc; 6997 } 6998 6999 static __maybe_unused int e1000e_pm_runtime_suspend(struct device *dev) 7000 { 7001 struct pci_dev *pdev = to_pci_dev(dev); 7002 struct net_device *netdev = pci_get_drvdata(pdev); 7003 struct e1000_adapter *adapter = netdev_priv(netdev); 7004 7005 if (netdev->flags & IFF_UP) { 7006 int count = E1000_CHECK_RESET_COUNT; 7007 7008 while (test_bit(__E1000_RESETTING, &adapter->state) && count--) 7009 usleep_range(10000, 11000); 7010 7011 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state)); 7012 7013 /* Down the device without resetting the hardware */ 7014 e1000e_down(adapter, false); 7015 } 7016 7017 if (__e1000_shutdown(pdev, true)) { 7018 e1000e_pm_runtime_resume(dev); 7019 return -EBUSY; 7020 } 7021 7022 return 0; 7023 } 7024 7025 static void e1000_shutdown(struct pci_dev *pdev) 7026 { 7027 e1000e_flush_lpic(pdev); 7028 7029 e1000e_pm_freeze(&pdev->dev); 7030 7031 __e1000_shutdown(pdev, false); 7032 } 7033 7034 #ifdef CONFIG_NET_POLL_CONTROLLER 7035 7036 static irqreturn_t e1000_intr_msix(int __always_unused irq, void *data) 7037 { 7038 struct net_device *netdev = data; 7039 struct e1000_adapter *adapter = netdev_priv(netdev); 7040 7041 if (adapter->msix_entries) { 7042 int vector, msix_irq; 7043 7044 vector = 0; 7045 msix_irq = adapter->msix_entries[vector].vector; 7046 if (disable_hardirq(msix_irq)) 7047 e1000_intr_msix_rx(msix_irq, netdev); 7048 enable_irq(msix_irq); 7049 7050 vector++; 7051 msix_irq = adapter->msix_entries[vector].vector; 7052 if (disable_hardirq(msix_irq)) 7053 e1000_intr_msix_tx(msix_irq, netdev); 7054 enable_irq(msix_irq); 7055 7056 vector++; 7057 msix_irq = adapter->msix_entries[vector].vector; 7058 if (disable_hardirq(msix_irq)) 7059 e1000_msix_other(msix_irq, netdev); 7060 enable_irq(msix_irq); 7061 } 7062 7063 return IRQ_HANDLED; 7064 } 7065 7066 /** 7067 * e1000_netpoll 7068 * @netdev: network interface device structure 7069 * 7070 * Polling 'interrupt' - used by things like netconsole to send skbs 7071 * without having to re-enable interrupts. It's not called while 7072 * the interrupt routine is executing. 7073 */ 7074 static void e1000_netpoll(struct net_device *netdev) 7075 { 7076 struct e1000_adapter *adapter = netdev_priv(netdev); 7077 7078 switch (adapter->int_mode) { 7079 case E1000E_INT_MODE_MSIX: 7080 e1000_intr_msix(adapter->pdev->irq, netdev); 7081 break; 7082 case E1000E_INT_MODE_MSI: 7083 if (disable_hardirq(adapter->pdev->irq)) 7084 e1000_intr_msi(adapter->pdev->irq, netdev); 7085 enable_irq(adapter->pdev->irq); 7086 break; 7087 default: /* E1000E_INT_MODE_LEGACY */ 7088 if (disable_hardirq(adapter->pdev->irq)) 7089 e1000_intr(adapter->pdev->irq, netdev); 7090 enable_irq(adapter->pdev->irq); 7091 break; 7092 } 7093 } 7094 #endif 7095 7096 /** 7097 * e1000_io_error_detected - called when PCI error is detected 7098 * @pdev: Pointer to PCI device 7099 * @state: The current pci connection state 7100 * 7101 * This function is called after a PCI bus error affecting 7102 * this device has been detected. 7103 */ 7104 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, 7105 pci_channel_state_t state) 7106 { 7107 e1000e_pm_freeze(&pdev->dev); 7108 7109 if (state == pci_channel_io_perm_failure) 7110 return PCI_ERS_RESULT_DISCONNECT; 7111 7112 pci_disable_device(pdev); 7113 7114 /* Request a slot slot reset. */ 7115 return PCI_ERS_RESULT_NEED_RESET; 7116 } 7117 7118 /** 7119 * e1000_io_slot_reset - called after the pci bus has been reset. 7120 * @pdev: Pointer to PCI device 7121 * 7122 * Restart the card from scratch, as if from a cold-boot. Implementation 7123 * resembles the first-half of the e1000e_pm_resume routine. 7124 */ 7125 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev) 7126 { 7127 struct net_device *netdev = pci_get_drvdata(pdev); 7128 struct e1000_adapter *adapter = netdev_priv(netdev); 7129 struct e1000_hw *hw = &adapter->hw; 7130 u16 aspm_disable_flag = 0; 7131 int err; 7132 pci_ers_result_t result; 7133 7134 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S) 7135 aspm_disable_flag = PCIE_LINK_STATE_L0S; 7136 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1) 7137 aspm_disable_flag |= PCIE_LINK_STATE_L1; 7138 if (aspm_disable_flag) 7139 e1000e_disable_aspm_locked(pdev, aspm_disable_flag); 7140 7141 err = pci_enable_device_mem(pdev); 7142 if (err) { 7143 dev_err(&pdev->dev, 7144 "Cannot re-enable PCI device after reset.\n"); 7145 result = PCI_ERS_RESULT_DISCONNECT; 7146 } else { 7147 pdev->state_saved = true; 7148 pci_restore_state(pdev); 7149 pci_set_master(pdev); 7150 7151 pci_enable_wake(pdev, PCI_D3hot, 0); 7152 pci_enable_wake(pdev, PCI_D3cold, 0); 7153 7154 e1000e_reset(adapter); 7155 ew32(WUS, ~0); 7156 result = PCI_ERS_RESULT_RECOVERED; 7157 } 7158 7159 return result; 7160 } 7161 7162 /** 7163 * e1000_io_resume - called when traffic can start flowing again. 7164 * @pdev: Pointer to PCI device 7165 * 7166 * This callback is called when the error recovery driver tells us that 7167 * its OK to resume normal operation. Implementation resembles the 7168 * second-half of the e1000e_pm_resume routine. 7169 */ 7170 static void e1000_io_resume(struct pci_dev *pdev) 7171 { 7172 struct net_device *netdev = pci_get_drvdata(pdev); 7173 struct e1000_adapter *adapter = netdev_priv(netdev); 7174 7175 e1000_init_manageability_pt(adapter); 7176 7177 e1000e_pm_thaw(&pdev->dev); 7178 7179 /* If the controller has AMT, do not set DRV_LOAD until the interface 7180 * is up. For all other cases, let the f/w know that the h/w is now 7181 * under the control of the driver. 7182 */ 7183 if (!(adapter->flags & FLAG_HAS_AMT)) 7184 e1000e_get_hw_control(adapter); 7185 } 7186 7187 static void e1000_print_device_info(struct e1000_adapter *adapter) 7188 { 7189 struct e1000_hw *hw = &adapter->hw; 7190 struct net_device *netdev = adapter->netdev; 7191 u32 ret_val; 7192 u8 pba_str[E1000_PBANUM_LENGTH]; 7193 7194 /* print bus type/speed/width info */ 7195 e_info("(PCI Express:2.5GT/s:%s) %pM\n", 7196 /* bus width */ 7197 ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" : 7198 "Width x1"), 7199 /* MAC address */ 7200 netdev->dev_addr); 7201 e_info("Intel(R) PRO/%s Network Connection\n", 7202 (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000"); 7203 ret_val = e1000_read_pba_string_generic(hw, pba_str, 7204 E1000_PBANUM_LENGTH); 7205 if (ret_val) 7206 strlcpy((char *)pba_str, "Unknown", sizeof(pba_str)); 7207 e_info("MAC: %d, PHY: %d, PBA No: %s\n", 7208 hw->mac.type, hw->phy.type, pba_str); 7209 } 7210 7211 static void e1000_eeprom_checks(struct e1000_adapter *adapter) 7212 { 7213 struct e1000_hw *hw = &adapter->hw; 7214 int ret_val; 7215 u16 buf = 0; 7216 7217 if (hw->mac.type != e1000_82573) 7218 return; 7219 7220 ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf); 7221 le16_to_cpus(&buf); 7222 if (!ret_val && (!(buf & BIT(0)))) { 7223 /* Deep Smart Power Down (DSPD) */ 7224 dev_warn(&adapter->pdev->dev, 7225 "Warning: detected DSPD enabled in EEPROM\n"); 7226 } 7227 } 7228 7229 static netdev_features_t e1000_fix_features(struct net_device *netdev, 7230 netdev_features_t features) 7231 { 7232 struct e1000_adapter *adapter = netdev_priv(netdev); 7233 struct e1000_hw *hw = &adapter->hw; 7234 7235 /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */ 7236 if ((hw->mac.type >= e1000_pch2lan) && (netdev->mtu > ETH_DATA_LEN)) 7237 features &= ~NETIF_F_RXFCS; 7238 7239 /* Since there is no support for separate Rx/Tx vlan accel 7240 * enable/disable make sure Tx flag is always in same state as Rx. 7241 */ 7242 if (features & NETIF_F_HW_VLAN_CTAG_RX) 7243 features |= NETIF_F_HW_VLAN_CTAG_TX; 7244 else 7245 features &= ~NETIF_F_HW_VLAN_CTAG_TX; 7246 7247 return features; 7248 } 7249 7250 static int e1000_set_features(struct net_device *netdev, 7251 netdev_features_t features) 7252 { 7253 struct e1000_adapter *adapter = netdev_priv(netdev); 7254 netdev_features_t changed = features ^ netdev->features; 7255 7256 if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) 7257 adapter->flags |= FLAG_TSO_FORCE; 7258 7259 if (!(changed & (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX | 7260 NETIF_F_RXCSUM | NETIF_F_RXHASH | NETIF_F_RXFCS | 7261 NETIF_F_RXALL))) 7262 return 0; 7263 7264 if (changed & NETIF_F_RXFCS) { 7265 if (features & NETIF_F_RXFCS) { 7266 adapter->flags2 &= ~FLAG2_CRC_STRIPPING; 7267 } else { 7268 /* We need to take it back to defaults, which might mean 7269 * stripping is still disabled at the adapter level. 7270 */ 7271 if (adapter->flags2 & FLAG2_DFLT_CRC_STRIPPING) 7272 adapter->flags2 |= FLAG2_CRC_STRIPPING; 7273 else 7274 adapter->flags2 &= ~FLAG2_CRC_STRIPPING; 7275 } 7276 } 7277 7278 netdev->features = features; 7279 7280 if (netif_running(netdev)) 7281 e1000e_reinit_locked(adapter); 7282 else 7283 e1000e_reset(adapter); 7284 7285 return 1; 7286 } 7287 7288 static const struct net_device_ops e1000e_netdev_ops = { 7289 .ndo_open = e1000e_open, 7290 .ndo_stop = e1000e_close, 7291 .ndo_start_xmit = e1000_xmit_frame, 7292 .ndo_get_stats64 = e1000e_get_stats64, 7293 .ndo_set_rx_mode = e1000e_set_rx_mode, 7294 .ndo_set_mac_address = e1000_set_mac, 7295 .ndo_change_mtu = e1000_change_mtu, 7296 .ndo_do_ioctl = e1000_ioctl, 7297 .ndo_tx_timeout = e1000_tx_timeout, 7298 .ndo_validate_addr = eth_validate_addr, 7299 7300 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid, 7301 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid, 7302 #ifdef CONFIG_NET_POLL_CONTROLLER 7303 .ndo_poll_controller = e1000_netpoll, 7304 #endif 7305 .ndo_set_features = e1000_set_features, 7306 .ndo_fix_features = e1000_fix_features, 7307 .ndo_features_check = passthru_features_check, 7308 }; 7309 7310 /** 7311 * e1000_probe - Device Initialization Routine 7312 * @pdev: PCI device information struct 7313 * @ent: entry in e1000_pci_tbl 7314 * 7315 * Returns 0 on success, negative on failure 7316 * 7317 * e1000_probe initializes an adapter identified by a pci_dev structure. 7318 * The OS initialization, configuring of the adapter private structure, 7319 * and a hardware reset occur. 7320 **/ 7321 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 7322 { 7323 struct net_device *netdev; 7324 struct e1000_adapter *adapter; 7325 struct e1000_hw *hw; 7326 const struct e1000_info *ei = e1000_info_tbl[ent->driver_data]; 7327 resource_size_t mmio_start, mmio_len; 7328 resource_size_t flash_start, flash_len; 7329 static int cards_found; 7330 u16 aspm_disable_flag = 0; 7331 int bars, i, err, pci_using_dac; 7332 u16 eeprom_data = 0; 7333 u16 eeprom_apme_mask = E1000_EEPROM_APME; 7334 s32 ret_val = 0; 7335 7336 if (ei->flags2 & FLAG2_DISABLE_ASPM_L0S) 7337 aspm_disable_flag = PCIE_LINK_STATE_L0S; 7338 if (ei->flags2 & FLAG2_DISABLE_ASPM_L1) 7339 aspm_disable_flag |= PCIE_LINK_STATE_L1; 7340 if (aspm_disable_flag) 7341 e1000e_disable_aspm(pdev, aspm_disable_flag); 7342 7343 err = pci_enable_device_mem(pdev); 7344 if (err) 7345 return err; 7346 7347 pci_using_dac = 0; 7348 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 7349 if (!err) { 7350 pci_using_dac = 1; 7351 } else { 7352 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 7353 if (err) { 7354 dev_err(&pdev->dev, 7355 "No usable DMA configuration, aborting\n"); 7356 goto err_dma; 7357 } 7358 } 7359 7360 bars = pci_select_bars(pdev, IORESOURCE_MEM); 7361 err = pci_request_selected_regions_exclusive(pdev, bars, 7362 e1000e_driver_name); 7363 if (err) 7364 goto err_pci_reg; 7365 7366 /* AER (Advanced Error Reporting) hooks */ 7367 pci_enable_pcie_error_reporting(pdev); 7368 7369 pci_set_master(pdev); 7370 /* PCI config space info */ 7371 err = pci_save_state(pdev); 7372 if (err) 7373 goto err_alloc_etherdev; 7374 7375 err = -ENOMEM; 7376 netdev = alloc_etherdev(sizeof(struct e1000_adapter)); 7377 if (!netdev) 7378 goto err_alloc_etherdev; 7379 7380 SET_NETDEV_DEV(netdev, &pdev->dev); 7381 7382 netdev->irq = pdev->irq; 7383 7384 pci_set_drvdata(pdev, netdev); 7385 adapter = netdev_priv(netdev); 7386 hw = &adapter->hw; 7387 adapter->netdev = netdev; 7388 adapter->pdev = pdev; 7389 adapter->ei = ei; 7390 adapter->pba = ei->pba; 7391 adapter->flags = ei->flags; 7392 adapter->flags2 = ei->flags2; 7393 adapter->hw.adapter = adapter; 7394 adapter->hw.mac.type = ei->mac; 7395 adapter->max_hw_frame_size = ei->max_hw_frame_size; 7396 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); 7397 7398 mmio_start = pci_resource_start(pdev, 0); 7399 mmio_len = pci_resource_len(pdev, 0); 7400 7401 err = -EIO; 7402 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len); 7403 if (!adapter->hw.hw_addr) 7404 goto err_ioremap; 7405 7406 if ((adapter->flags & FLAG_HAS_FLASH) && 7407 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM) && 7408 (hw->mac.type < e1000_pch_spt)) { 7409 flash_start = pci_resource_start(pdev, 1); 7410 flash_len = pci_resource_len(pdev, 1); 7411 adapter->hw.flash_address = ioremap(flash_start, flash_len); 7412 if (!adapter->hw.flash_address) 7413 goto err_flashmap; 7414 } 7415 7416 /* Set default EEE advertisement */ 7417 if (adapter->flags2 & FLAG2_HAS_EEE) 7418 adapter->eee_advert = MDIO_EEE_100TX | MDIO_EEE_1000T; 7419 7420 /* construct the net_device struct */ 7421 netdev->netdev_ops = &e1000e_netdev_ops; 7422 e1000e_set_ethtool_ops(netdev); 7423 netdev->watchdog_timeo = 5 * HZ; 7424 netif_napi_add(netdev, &adapter->napi, e1000e_poll, 64); 7425 strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name)); 7426 7427 netdev->mem_start = mmio_start; 7428 netdev->mem_end = mmio_start + mmio_len; 7429 7430 adapter->bd_number = cards_found++; 7431 7432 e1000e_check_options(adapter); 7433 7434 /* setup adapter struct */ 7435 err = e1000_sw_init(adapter); 7436 if (err) 7437 goto err_sw_init; 7438 7439 memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops)); 7440 memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops)); 7441 memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops)); 7442 7443 err = ei->get_variants(adapter); 7444 if (err) 7445 goto err_hw_init; 7446 7447 if ((adapter->flags & FLAG_IS_ICH) && 7448 (adapter->flags & FLAG_READ_ONLY_NVM) && 7449 (hw->mac.type < e1000_pch_spt)) 7450 e1000e_write_protect_nvm_ich8lan(&adapter->hw); 7451 7452 hw->mac.ops.get_bus_info(&adapter->hw); 7453 7454 adapter->hw.phy.autoneg_wait_to_complete = 0; 7455 7456 /* Copper options */ 7457 if (adapter->hw.phy.media_type == e1000_media_type_copper) { 7458 adapter->hw.phy.mdix = AUTO_ALL_MODES; 7459 adapter->hw.phy.disable_polarity_correction = 0; 7460 adapter->hw.phy.ms_type = e1000_ms_hw_default; 7461 } 7462 7463 if (hw->phy.ops.check_reset_block && hw->phy.ops.check_reset_block(hw)) 7464 dev_info(&pdev->dev, 7465 "PHY reset is blocked due to SOL/IDER session.\n"); 7466 7467 /* Set initial default active device features */ 7468 netdev->features = (NETIF_F_SG | 7469 NETIF_F_HW_VLAN_CTAG_RX | 7470 NETIF_F_HW_VLAN_CTAG_TX | 7471 NETIF_F_TSO | 7472 NETIF_F_TSO6 | 7473 NETIF_F_RXHASH | 7474 NETIF_F_RXCSUM | 7475 NETIF_F_HW_CSUM); 7476 7477 /* Set user-changeable features (subset of all device features) */ 7478 netdev->hw_features = netdev->features; 7479 netdev->hw_features |= NETIF_F_RXFCS; 7480 netdev->priv_flags |= IFF_SUPP_NOFCS; 7481 netdev->hw_features |= NETIF_F_RXALL; 7482 7483 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) 7484 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 7485 7486 netdev->vlan_features |= (NETIF_F_SG | 7487 NETIF_F_TSO | 7488 NETIF_F_TSO6 | 7489 NETIF_F_HW_CSUM); 7490 7491 netdev->priv_flags |= IFF_UNICAST_FLT; 7492 7493 if (pci_using_dac) { 7494 netdev->features |= NETIF_F_HIGHDMA; 7495 netdev->vlan_features |= NETIF_F_HIGHDMA; 7496 } 7497 7498 /* MTU range: 68 - max_hw_frame_size */ 7499 netdev->min_mtu = ETH_MIN_MTU; 7500 netdev->max_mtu = adapter->max_hw_frame_size - 7501 (VLAN_ETH_HLEN + ETH_FCS_LEN); 7502 7503 if (e1000e_enable_mng_pass_thru(&adapter->hw)) 7504 adapter->flags |= FLAG_MNG_PT_ENABLED; 7505 7506 /* before reading the NVM, reset the controller to 7507 * put the device in a known good starting state 7508 */ 7509 adapter->hw.mac.ops.reset_hw(&adapter->hw); 7510 7511 /* systems with ASPM and others may see the checksum fail on the first 7512 * attempt. Let's give it a few tries 7513 */ 7514 for (i = 0;; i++) { 7515 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0) 7516 break; 7517 if (i == 2) { 7518 dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n"); 7519 err = -EIO; 7520 goto err_eeprom; 7521 } 7522 } 7523 7524 e1000_eeprom_checks(adapter); 7525 7526 /* copy the MAC address */ 7527 if (e1000e_read_mac_addr(&adapter->hw)) 7528 dev_err(&pdev->dev, 7529 "NVM Read Error while reading MAC address\n"); 7530 7531 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len); 7532 7533 if (!is_valid_ether_addr(netdev->dev_addr)) { 7534 dev_err(&pdev->dev, "Invalid MAC Address: %pM\n", 7535 netdev->dev_addr); 7536 err = -EIO; 7537 goto err_eeprom; 7538 } 7539 7540 timer_setup(&adapter->watchdog_timer, e1000_watchdog, 0); 7541 timer_setup(&adapter->phy_info_timer, e1000_update_phy_info, 0); 7542 7543 INIT_WORK(&adapter->reset_task, e1000_reset_task); 7544 INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task); 7545 INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround); 7546 INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task); 7547 INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang); 7548 7549 /* Initialize link parameters. User can change them with ethtool */ 7550 adapter->hw.mac.autoneg = 1; 7551 adapter->fc_autoneg = true; 7552 adapter->hw.fc.requested_mode = e1000_fc_default; 7553 adapter->hw.fc.current_mode = e1000_fc_default; 7554 adapter->hw.phy.autoneg_advertised = 0x2f; 7555 7556 /* Initial Wake on LAN setting - If APM wake is enabled in 7557 * the EEPROM, enable the ACPI Magic Packet filter 7558 */ 7559 if (adapter->flags & FLAG_APME_IN_WUC) { 7560 /* APME bit in EEPROM is mapped to WUC.APME */ 7561 eeprom_data = er32(WUC); 7562 eeprom_apme_mask = E1000_WUC_APME; 7563 if ((hw->mac.type > e1000_ich10lan) && 7564 (eeprom_data & E1000_WUC_PHY_WAKE)) 7565 adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP; 7566 } else if (adapter->flags & FLAG_APME_IN_CTRL3) { 7567 if (adapter->flags & FLAG_APME_CHECK_PORT_B && 7568 (adapter->hw.bus.func == 1)) 7569 ret_val = e1000_read_nvm(&adapter->hw, 7570 NVM_INIT_CONTROL3_PORT_B, 7571 1, &eeprom_data); 7572 else 7573 ret_val = e1000_read_nvm(&adapter->hw, 7574 NVM_INIT_CONTROL3_PORT_A, 7575 1, &eeprom_data); 7576 } 7577 7578 /* fetch WoL from EEPROM */ 7579 if (ret_val) 7580 e_dbg("NVM read error getting WoL initial values: %d\n", ret_val); 7581 else if (eeprom_data & eeprom_apme_mask) 7582 adapter->eeprom_wol |= E1000_WUFC_MAG; 7583 7584 /* now that we have the eeprom settings, apply the special cases 7585 * where the eeprom may be wrong or the board simply won't support 7586 * wake on lan on a particular port 7587 */ 7588 if (!(adapter->flags & FLAG_HAS_WOL)) 7589 adapter->eeprom_wol = 0; 7590 7591 /* initialize the wol settings based on the eeprom settings */ 7592 adapter->wol = adapter->eeprom_wol; 7593 7594 /* make sure adapter isn't asleep if manageability is enabled */ 7595 if (adapter->wol || (adapter->flags & FLAG_MNG_PT_ENABLED) || 7596 (hw->mac.ops.check_mng_mode(hw))) 7597 device_wakeup_enable(&pdev->dev); 7598 7599 /* save off EEPROM version number */ 7600 ret_val = e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers); 7601 7602 if (ret_val) { 7603 e_dbg("NVM read error getting EEPROM version: %d\n", ret_val); 7604 adapter->eeprom_vers = 0; 7605 } 7606 7607 /* init PTP hardware clock */ 7608 e1000e_ptp_init(adapter); 7609 7610 /* reset the hardware with the new settings */ 7611 e1000e_reset(adapter); 7612 7613 /* If the controller has AMT, do not set DRV_LOAD until the interface 7614 * is up. For all other cases, let the f/w know that the h/w is now 7615 * under the control of the driver. 7616 */ 7617 if (!(adapter->flags & FLAG_HAS_AMT)) 7618 e1000e_get_hw_control(adapter); 7619 7620 if (hw->mac.type >= e1000_pch_cnp) 7621 adapter->flags2 |= FLAG2_ENABLE_S0IX_FLOWS; 7622 7623 strlcpy(netdev->name, "eth%d", sizeof(netdev->name)); 7624 err = register_netdev(netdev); 7625 if (err) 7626 goto err_register; 7627 7628 /* carrier off reporting is important to ethtool even BEFORE open */ 7629 netif_carrier_off(netdev); 7630 7631 e1000_print_device_info(adapter); 7632 7633 dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE); 7634 7635 if (pci_dev_run_wake(pdev) && hw->mac.type < e1000_pch_cnp) 7636 pm_runtime_put_noidle(&pdev->dev); 7637 7638 return 0; 7639 7640 err_register: 7641 if (!(adapter->flags & FLAG_HAS_AMT)) 7642 e1000e_release_hw_control(adapter); 7643 err_eeprom: 7644 if (hw->phy.ops.check_reset_block && !hw->phy.ops.check_reset_block(hw)) 7645 e1000_phy_hw_reset(&adapter->hw); 7646 err_hw_init: 7647 kfree(adapter->tx_ring); 7648 kfree(adapter->rx_ring); 7649 err_sw_init: 7650 if ((adapter->hw.flash_address) && (hw->mac.type < e1000_pch_spt)) 7651 iounmap(adapter->hw.flash_address); 7652 e1000e_reset_interrupt_capability(adapter); 7653 err_flashmap: 7654 iounmap(adapter->hw.hw_addr); 7655 err_ioremap: 7656 free_netdev(netdev); 7657 err_alloc_etherdev: 7658 pci_release_mem_regions(pdev); 7659 err_pci_reg: 7660 err_dma: 7661 pci_disable_device(pdev); 7662 return err; 7663 } 7664 7665 /** 7666 * e1000_remove - Device Removal Routine 7667 * @pdev: PCI device information struct 7668 * 7669 * e1000_remove is called by the PCI subsystem to alert the driver 7670 * that it should release a PCI device. The could be caused by a 7671 * Hot-Plug event, or because the driver is going to be removed from 7672 * memory. 7673 **/ 7674 static void e1000_remove(struct pci_dev *pdev) 7675 { 7676 struct net_device *netdev = pci_get_drvdata(pdev); 7677 struct e1000_adapter *adapter = netdev_priv(netdev); 7678 7679 e1000e_ptp_remove(adapter); 7680 7681 /* The timers may be rescheduled, so explicitly disable them 7682 * from being rescheduled. 7683 */ 7684 set_bit(__E1000_DOWN, &adapter->state); 7685 del_timer_sync(&adapter->watchdog_timer); 7686 del_timer_sync(&adapter->phy_info_timer); 7687 7688 cancel_work_sync(&adapter->reset_task); 7689 cancel_work_sync(&adapter->watchdog_task); 7690 cancel_work_sync(&adapter->downshift_task); 7691 cancel_work_sync(&adapter->update_phy_task); 7692 cancel_work_sync(&adapter->print_hang_task); 7693 7694 if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) { 7695 cancel_work_sync(&adapter->tx_hwtstamp_work); 7696 if (adapter->tx_hwtstamp_skb) { 7697 dev_consume_skb_any(adapter->tx_hwtstamp_skb); 7698 adapter->tx_hwtstamp_skb = NULL; 7699 } 7700 } 7701 7702 unregister_netdev(netdev); 7703 7704 if (pci_dev_run_wake(pdev)) 7705 pm_runtime_get_noresume(&pdev->dev); 7706 7707 /* Release control of h/w to f/w. If f/w is AMT enabled, this 7708 * would have already happened in close and is redundant. 7709 */ 7710 e1000e_release_hw_control(adapter); 7711 7712 e1000e_reset_interrupt_capability(adapter); 7713 kfree(adapter->tx_ring); 7714 kfree(adapter->rx_ring); 7715 7716 iounmap(adapter->hw.hw_addr); 7717 if ((adapter->hw.flash_address) && 7718 (adapter->hw.mac.type < e1000_pch_spt)) 7719 iounmap(adapter->hw.flash_address); 7720 pci_release_mem_regions(pdev); 7721 7722 free_netdev(netdev); 7723 7724 /* AER disable */ 7725 pci_disable_pcie_error_reporting(pdev); 7726 7727 pci_disable_device(pdev); 7728 } 7729 7730 /* PCI Error Recovery (ERS) */ 7731 static const struct pci_error_handlers e1000_err_handler = { 7732 .error_detected = e1000_io_error_detected, 7733 .slot_reset = e1000_io_slot_reset, 7734 .resume = e1000_io_resume, 7735 }; 7736 7737 static const struct pci_device_id e1000_pci_tbl[] = { 7738 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 }, 7739 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 }, 7740 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 }, 7741 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), 7742 board_82571 }, 7743 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 }, 7744 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 }, 7745 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 }, 7746 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 }, 7747 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 }, 7748 7749 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 }, 7750 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 }, 7751 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 }, 7752 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 }, 7753 7754 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 }, 7755 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 }, 7756 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 }, 7757 7758 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 }, 7759 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 }, 7760 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 }, 7761 7762 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT), 7763 board_80003es2lan }, 7764 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT), 7765 board_80003es2lan }, 7766 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT), 7767 board_80003es2lan }, 7768 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT), 7769 board_80003es2lan }, 7770 7771 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan }, 7772 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan }, 7773 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan }, 7774 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan }, 7775 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan }, 7776 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan }, 7777 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan }, 7778 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan }, 7779 7780 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan }, 7781 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan }, 7782 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan }, 7783 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan }, 7784 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan }, 7785 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan }, 7786 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan }, 7787 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan }, 7788 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan }, 7789 7790 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan }, 7791 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan }, 7792 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan }, 7793 7794 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan }, 7795 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan }, 7796 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_V), board_ich10lan }, 7797 7798 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan }, 7799 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan }, 7800 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan }, 7801 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan }, 7802 7803 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_LM), board_pch2lan }, 7804 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_V), board_pch2lan }, 7805 7806 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_LM), board_pch_lpt }, 7807 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_V), board_pch_lpt }, 7808 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_LM), board_pch_lpt }, 7809 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_V), board_pch_lpt }, 7810 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_LM2), board_pch_lpt }, 7811 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_V2), board_pch_lpt }, 7812 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_LM3), board_pch_lpt }, 7813 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_V3), board_pch_lpt }, 7814 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM), board_pch_spt }, 7815 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V), board_pch_spt }, 7816 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM2), board_pch_spt }, 7817 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V2), board_pch_spt }, 7818 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LBG_I219_LM3), board_pch_spt }, 7819 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM4), board_pch_spt }, 7820 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V4), board_pch_spt }, 7821 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM5), board_pch_spt }, 7822 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V5), board_pch_spt }, 7823 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CNP_I219_LM6), board_pch_cnp }, 7824 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CNP_I219_V6), board_pch_cnp }, 7825 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CNP_I219_LM7), board_pch_cnp }, 7826 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CNP_I219_V7), board_pch_cnp }, 7827 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ICP_I219_LM8), board_pch_cnp }, 7828 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ICP_I219_V8), board_pch_cnp }, 7829 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ICP_I219_LM9), board_pch_cnp }, 7830 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ICP_I219_V9), board_pch_cnp }, 7831 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CMP_I219_LM10), board_pch_cnp }, 7832 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CMP_I219_V10), board_pch_cnp }, 7833 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CMP_I219_LM11), board_pch_cnp }, 7834 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CMP_I219_V11), board_pch_cnp }, 7835 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CMP_I219_LM12), board_pch_spt }, 7836 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_CMP_I219_V12), board_pch_spt }, 7837 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_TGP_I219_LM13), board_pch_cnp }, 7838 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_TGP_I219_V13), board_pch_cnp }, 7839 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_TGP_I219_LM14), board_pch_cnp }, 7840 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_TGP_I219_V14), board_pch_cnp }, 7841 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_TGP_I219_LM15), board_pch_cnp }, 7842 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_TGP_I219_V15), board_pch_cnp }, 7843 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ADP_I219_LM16), board_pch_cnp }, 7844 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ADP_I219_V16), board_pch_cnp }, 7845 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ADP_I219_LM17), board_pch_cnp }, 7846 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_ADP_I219_V17), board_pch_cnp }, 7847 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_MTP_I219_LM18), board_pch_cnp }, 7848 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_MTP_I219_V18), board_pch_cnp }, 7849 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_MTP_I219_LM19), board_pch_cnp }, 7850 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_MTP_I219_V19), board_pch_cnp }, 7851 7852 { 0, 0, 0, 0, 0, 0, 0 } /* terminate list */ 7853 }; 7854 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl); 7855 7856 static const struct dev_pm_ops e1000_pm_ops = { 7857 #ifdef CONFIG_PM_SLEEP 7858 .suspend = e1000e_pm_suspend, 7859 .resume = e1000e_pm_resume, 7860 .freeze = e1000e_pm_freeze, 7861 .thaw = e1000e_pm_thaw, 7862 .poweroff = e1000e_pm_suspend, 7863 .restore = e1000e_pm_resume, 7864 #endif 7865 SET_RUNTIME_PM_OPS(e1000e_pm_runtime_suspend, e1000e_pm_runtime_resume, 7866 e1000e_pm_runtime_idle) 7867 }; 7868 7869 /* PCI Device API Driver */ 7870 static struct pci_driver e1000_driver = { 7871 .name = e1000e_driver_name, 7872 .id_table = e1000_pci_tbl, 7873 .probe = e1000_probe, 7874 .remove = e1000_remove, 7875 .driver = { 7876 .pm = &e1000_pm_ops, 7877 }, 7878 .shutdown = e1000_shutdown, 7879 .err_handler = &e1000_err_handler 7880 }; 7881 7882 /** 7883 * e1000_init_module - Driver Registration Routine 7884 * 7885 * e1000_init_module is the first routine called when the driver is 7886 * loaded. All it does is register with the PCI subsystem. 7887 **/ 7888 static int __init e1000_init_module(void) 7889 { 7890 pr_info("Intel(R) PRO/1000 Network Driver\n"); 7891 pr_info("Copyright(c) 1999 - 2015 Intel Corporation.\n"); 7892 7893 return pci_register_driver(&e1000_driver); 7894 } 7895 module_init(e1000_init_module); 7896 7897 /** 7898 * e1000_exit_module - Driver Exit Cleanup Routine 7899 * 7900 * e1000_exit_module is called just before the driver is removed 7901 * from memory. 7902 **/ 7903 static void __exit e1000_exit_module(void) 7904 { 7905 pci_unregister_driver(&e1000_driver); 7906 } 7907 module_exit(e1000_exit_module); 7908 7909 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); 7910 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver"); 7911 MODULE_LICENSE("GPL v2"); 7912 7913 /* netdev.c */ 7914