1 /******************************************************************************* 2 3 Intel PRO/1000 Linux driver 4 Copyright(c) 1999 - 2013 Intel Corporation. 5 6 This program is free software; you can redistribute it and/or modify it 7 under the terms and conditions of the GNU General Public License, 8 version 2, as published by the Free Software Foundation. 9 10 This program is distributed in the hope it will be useful, but WITHOUT 11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 more details. 14 15 You should have received a copy of the GNU General Public License along with 16 this program; if not, write to the Free Software Foundation, Inc., 17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 18 19 The full GNU General Public License is included in this distribution in 20 the file called "COPYING". 21 22 Contact Information: 23 Linux NICS <linux.nics@intel.com> 24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 26 27 *******************************************************************************/ 28 29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 30 31 #include <linux/module.h> 32 #include <linux/types.h> 33 #include <linux/init.h> 34 #include <linux/pci.h> 35 #include <linux/vmalloc.h> 36 #include <linux/pagemap.h> 37 #include <linux/delay.h> 38 #include <linux/netdevice.h> 39 #include <linux/interrupt.h> 40 #include <linux/tcp.h> 41 #include <linux/ipv6.h> 42 #include <linux/slab.h> 43 #include <net/checksum.h> 44 #include <net/ip6_checksum.h> 45 #include <linux/ethtool.h> 46 #include <linux/if_vlan.h> 47 #include <linux/cpu.h> 48 #include <linux/smp.h> 49 #include <linux/pm_qos.h> 50 #include <linux/pm_runtime.h> 51 #include <linux/aer.h> 52 #include <linux/prefetch.h> 53 54 #include "e1000.h" 55 56 #define DRV_EXTRAVERSION "-k" 57 58 #define DRV_VERSION "2.3.2" DRV_EXTRAVERSION 59 char e1000e_driver_name[] = "e1000e"; 60 const char e1000e_driver_version[] = DRV_VERSION; 61 62 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) 63 static int debug = -1; 64 module_param(debug, int, 0); 65 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 66 67 static const struct e1000_info *e1000_info_tbl[] = { 68 [board_82571] = &e1000_82571_info, 69 [board_82572] = &e1000_82572_info, 70 [board_82573] = &e1000_82573_info, 71 [board_82574] = &e1000_82574_info, 72 [board_82583] = &e1000_82583_info, 73 [board_80003es2lan] = &e1000_es2_info, 74 [board_ich8lan] = &e1000_ich8_info, 75 [board_ich9lan] = &e1000_ich9_info, 76 [board_ich10lan] = &e1000_ich10_info, 77 [board_pchlan] = &e1000_pch_info, 78 [board_pch2lan] = &e1000_pch2_info, 79 [board_pch_lpt] = &e1000_pch_lpt_info, 80 }; 81 82 struct e1000_reg_info { 83 u32 ofs; 84 char *name; 85 }; 86 87 static const struct e1000_reg_info e1000_reg_info_tbl[] = { 88 /* General Registers */ 89 {E1000_CTRL, "CTRL"}, 90 {E1000_STATUS, "STATUS"}, 91 {E1000_CTRL_EXT, "CTRL_EXT"}, 92 93 /* Interrupt Registers */ 94 {E1000_ICR, "ICR"}, 95 96 /* Rx Registers */ 97 {E1000_RCTL, "RCTL"}, 98 {E1000_RDLEN(0), "RDLEN"}, 99 {E1000_RDH(0), "RDH"}, 100 {E1000_RDT(0), "RDT"}, 101 {E1000_RDTR, "RDTR"}, 102 {E1000_RXDCTL(0), "RXDCTL"}, 103 {E1000_ERT, "ERT"}, 104 {E1000_RDBAL(0), "RDBAL"}, 105 {E1000_RDBAH(0), "RDBAH"}, 106 {E1000_RDFH, "RDFH"}, 107 {E1000_RDFT, "RDFT"}, 108 {E1000_RDFHS, "RDFHS"}, 109 {E1000_RDFTS, "RDFTS"}, 110 {E1000_RDFPC, "RDFPC"}, 111 112 /* Tx Registers */ 113 {E1000_TCTL, "TCTL"}, 114 {E1000_TDBAL(0), "TDBAL"}, 115 {E1000_TDBAH(0), "TDBAH"}, 116 {E1000_TDLEN(0), "TDLEN"}, 117 {E1000_TDH(0), "TDH"}, 118 {E1000_TDT(0), "TDT"}, 119 {E1000_TIDV, "TIDV"}, 120 {E1000_TXDCTL(0), "TXDCTL"}, 121 {E1000_TADV, "TADV"}, 122 {E1000_TARC(0), "TARC"}, 123 {E1000_TDFH, "TDFH"}, 124 {E1000_TDFT, "TDFT"}, 125 {E1000_TDFHS, "TDFHS"}, 126 {E1000_TDFTS, "TDFTS"}, 127 {E1000_TDFPC, "TDFPC"}, 128 129 /* List Terminator */ 130 {0, NULL} 131 }; 132 133 /** 134 * e1000_regdump - register printout routine 135 * @hw: pointer to the HW structure 136 * @reginfo: pointer to the register info table 137 **/ 138 static void e1000_regdump(struct e1000_hw *hw, struct e1000_reg_info *reginfo) 139 { 140 int n = 0; 141 char rname[16]; 142 u32 regs[8]; 143 144 switch (reginfo->ofs) { 145 case E1000_RXDCTL(0): 146 for (n = 0; n < 2; n++) 147 regs[n] = __er32(hw, E1000_RXDCTL(n)); 148 break; 149 case E1000_TXDCTL(0): 150 for (n = 0; n < 2; n++) 151 regs[n] = __er32(hw, E1000_TXDCTL(n)); 152 break; 153 case E1000_TARC(0): 154 for (n = 0; n < 2; n++) 155 regs[n] = __er32(hw, E1000_TARC(n)); 156 break; 157 default: 158 pr_info("%-15s %08x\n", 159 reginfo->name, __er32(hw, reginfo->ofs)); 160 return; 161 } 162 163 snprintf(rname, 16, "%s%s", reginfo->name, "[0-1]"); 164 pr_info("%-15s %08x %08x\n", rname, regs[0], regs[1]); 165 } 166 167 static void e1000e_dump_ps_pages(struct e1000_adapter *adapter, 168 struct e1000_buffer *bi) 169 { 170 int i; 171 struct e1000_ps_page *ps_page; 172 173 for (i = 0; i < adapter->rx_ps_pages; i++) { 174 ps_page = &bi->ps_pages[i]; 175 176 if (ps_page->page) { 177 pr_info("packet dump for ps_page %d:\n", i); 178 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 179 16, 1, page_address(ps_page->page), 180 PAGE_SIZE, true); 181 } 182 } 183 } 184 185 /** 186 * e1000e_dump - Print registers, Tx-ring and Rx-ring 187 * @adapter: board private structure 188 **/ 189 static void e1000e_dump(struct e1000_adapter *adapter) 190 { 191 struct net_device *netdev = adapter->netdev; 192 struct e1000_hw *hw = &adapter->hw; 193 struct e1000_reg_info *reginfo; 194 struct e1000_ring *tx_ring = adapter->tx_ring; 195 struct e1000_tx_desc *tx_desc; 196 struct my_u0 { 197 __le64 a; 198 __le64 b; 199 } *u0; 200 struct e1000_buffer *buffer_info; 201 struct e1000_ring *rx_ring = adapter->rx_ring; 202 union e1000_rx_desc_packet_split *rx_desc_ps; 203 union e1000_rx_desc_extended *rx_desc; 204 struct my_u1 { 205 __le64 a; 206 __le64 b; 207 __le64 c; 208 __le64 d; 209 } *u1; 210 u32 staterr; 211 int i = 0; 212 213 if (!netif_msg_hw(adapter)) 214 return; 215 216 /* Print netdevice Info */ 217 if (netdev) { 218 dev_info(&adapter->pdev->dev, "Net device Info\n"); 219 pr_info("Device Name state trans_start last_rx\n"); 220 pr_info("%-15s %016lX %016lX %016lX\n", netdev->name, 221 netdev->state, netdev->trans_start, netdev->last_rx); 222 } 223 224 /* Print Registers */ 225 dev_info(&adapter->pdev->dev, "Register Dump\n"); 226 pr_info(" Register Name Value\n"); 227 for (reginfo = (struct e1000_reg_info *)e1000_reg_info_tbl; 228 reginfo->name; reginfo++) { 229 e1000_regdump(hw, reginfo); 230 } 231 232 /* Print Tx Ring Summary */ 233 if (!netdev || !netif_running(netdev)) 234 return; 235 236 dev_info(&adapter->pdev->dev, "Tx Ring Summary\n"); 237 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n"); 238 buffer_info = &tx_ring->buffer_info[tx_ring->next_to_clean]; 239 pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n", 240 0, tx_ring->next_to_use, tx_ring->next_to_clean, 241 (unsigned long long)buffer_info->dma, 242 buffer_info->length, 243 buffer_info->next_to_watch, 244 (unsigned long long)buffer_info->time_stamp); 245 246 /* Print Tx Ring */ 247 if (!netif_msg_tx_done(adapter)) 248 goto rx_ring_summary; 249 250 dev_info(&adapter->pdev->dev, "Tx Ring Dump\n"); 251 252 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended) 253 * 254 * Legacy Transmit Descriptor 255 * +--------------------------------------------------------------+ 256 * 0 | Buffer Address [63:0] (Reserved on Write Back) | 257 * +--------------------------------------------------------------+ 258 * 8 | Special | CSS | Status | CMD | CSO | Length | 259 * +--------------------------------------------------------------+ 260 * 63 48 47 36 35 32 31 24 23 16 15 0 261 * 262 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload 263 * 63 48 47 40 39 32 31 16 15 8 7 0 264 * +----------------------------------------------------------------+ 265 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS | 266 * +----------------------------------------------------------------+ 267 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN | 268 * +----------------------------------------------------------------+ 269 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 270 * 271 * Extended Data Descriptor (DTYP=0x1) 272 * +----------------------------------------------------------------+ 273 * 0 | Buffer Address [63:0] | 274 * +----------------------------------------------------------------+ 275 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN | 276 * +----------------------------------------------------------------+ 277 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 278 */ 279 pr_info("Tl[desc] [address 63:0 ] [SpeCssSCmCsLen] [bi->dma ] leng ntw timestamp bi->skb <-- Legacy format\n"); 280 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Context format\n"); 281 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Data format\n"); 282 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) { 283 const char *next_desc; 284 tx_desc = E1000_TX_DESC(*tx_ring, i); 285 buffer_info = &tx_ring->buffer_info[i]; 286 u0 = (struct my_u0 *)tx_desc; 287 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean) 288 next_desc = " NTC/U"; 289 else if (i == tx_ring->next_to_use) 290 next_desc = " NTU"; 291 else if (i == tx_ring->next_to_clean) 292 next_desc = " NTC"; 293 else 294 next_desc = ""; 295 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p%s\n", 296 (!(le64_to_cpu(u0->b) & (1 << 29)) ? 'l' : 297 ((le64_to_cpu(u0->b) & (1 << 20)) ? 'd' : 'c')), 298 i, 299 (unsigned long long)le64_to_cpu(u0->a), 300 (unsigned long long)le64_to_cpu(u0->b), 301 (unsigned long long)buffer_info->dma, 302 buffer_info->length, buffer_info->next_to_watch, 303 (unsigned long long)buffer_info->time_stamp, 304 buffer_info->skb, next_desc); 305 306 if (netif_msg_pktdata(adapter) && buffer_info->skb) 307 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 308 16, 1, buffer_info->skb->data, 309 buffer_info->skb->len, true); 310 } 311 312 /* Print Rx Ring Summary */ 313 rx_ring_summary: 314 dev_info(&adapter->pdev->dev, "Rx Ring Summary\n"); 315 pr_info("Queue [NTU] [NTC]\n"); 316 pr_info(" %5d %5X %5X\n", 317 0, rx_ring->next_to_use, rx_ring->next_to_clean); 318 319 /* Print Rx Ring */ 320 if (!netif_msg_rx_status(adapter)) 321 return; 322 323 dev_info(&adapter->pdev->dev, "Rx Ring Dump\n"); 324 switch (adapter->rx_ps_pages) { 325 case 1: 326 case 2: 327 case 3: 328 /* [Extended] Packet Split Receive Descriptor Format 329 * 330 * +-----------------------------------------------------+ 331 * 0 | Buffer Address 0 [63:0] | 332 * +-----------------------------------------------------+ 333 * 8 | Buffer Address 1 [63:0] | 334 * +-----------------------------------------------------+ 335 * 16 | Buffer Address 2 [63:0] | 336 * +-----------------------------------------------------+ 337 * 24 | Buffer Address 3 [63:0] | 338 * +-----------------------------------------------------+ 339 */ 340 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"); 341 /* [Extended] Receive Descriptor (Write-Back) Format 342 * 343 * 63 48 47 32 31 13 12 8 7 4 3 0 344 * +------------------------------------------------------+ 345 * 0 | Packet | IP | Rsvd | MRQ | Rsvd | MRQ RSS | 346 * | Checksum | Ident | | Queue | | Type | 347 * +------------------------------------------------------+ 348 * 8 | VLAN Tag | Length | Extended Error | Extended Status | 349 * +------------------------------------------------------+ 350 * 63 48 47 32 31 20 19 0 351 */ 352 pr_info("RWB[desc] [ck ipid mrqhsh] [vl l0 ee es] [ l3 l2 l1 hs] [reserved ] ---------------- [bi->skb] <-- Ext Rx Write-Back format\n"); 353 for (i = 0; i < rx_ring->count; i++) { 354 const char *next_desc; 355 buffer_info = &rx_ring->buffer_info[i]; 356 rx_desc_ps = E1000_RX_DESC_PS(*rx_ring, i); 357 u1 = (struct my_u1 *)rx_desc_ps; 358 staterr = 359 le32_to_cpu(rx_desc_ps->wb.middle.status_error); 360 361 if (i == rx_ring->next_to_use) 362 next_desc = " NTU"; 363 else if (i == rx_ring->next_to_clean) 364 next_desc = " NTC"; 365 else 366 next_desc = ""; 367 368 if (staterr & E1000_RXD_STAT_DD) { 369 /* Descriptor Done */ 370 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX ---------------- %p%s\n", 371 "RWB", i, 372 (unsigned long long)le64_to_cpu(u1->a), 373 (unsigned long long)le64_to_cpu(u1->b), 374 (unsigned long long)le64_to_cpu(u1->c), 375 (unsigned long long)le64_to_cpu(u1->d), 376 buffer_info->skb, next_desc); 377 } else { 378 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX %016llX %p%s\n", 379 "R ", i, 380 (unsigned long long)le64_to_cpu(u1->a), 381 (unsigned long long)le64_to_cpu(u1->b), 382 (unsigned long long)le64_to_cpu(u1->c), 383 (unsigned long long)le64_to_cpu(u1->d), 384 (unsigned long long)buffer_info->dma, 385 buffer_info->skb, next_desc); 386 387 if (netif_msg_pktdata(adapter)) 388 e1000e_dump_ps_pages(adapter, 389 buffer_info); 390 } 391 } 392 break; 393 default: 394 case 0: 395 /* Extended Receive Descriptor (Read) Format 396 * 397 * +-----------------------------------------------------+ 398 * 0 | Buffer Address [63:0] | 399 * +-----------------------------------------------------+ 400 * 8 | Reserved | 401 * +-----------------------------------------------------+ 402 */ 403 pr_info("R [desc] [buf addr 63:0 ] [reserved 63:0 ] [bi->dma ] [bi->skb] <-- Ext (Read) format\n"); 404 /* Extended Receive Descriptor (Write-Back) Format 405 * 406 * 63 48 47 32 31 24 23 4 3 0 407 * +------------------------------------------------------+ 408 * | RSS Hash | | | | 409 * 0 +-------------------+ Rsvd | Reserved | MRQ RSS | 410 * | Packet | IP | | | Type | 411 * | Checksum | Ident | | | | 412 * +------------------------------------------------------+ 413 * 8 | VLAN Tag | Length | Extended Error | Extended Status | 414 * +------------------------------------------------------+ 415 * 63 48 47 32 31 20 19 0 416 */ 417 pr_info("RWB[desc] [cs ipid mrq] [vt ln xe xs] [bi->skb] <-- Ext (Write-Back) format\n"); 418 419 for (i = 0; i < rx_ring->count; i++) { 420 const char *next_desc; 421 422 buffer_info = &rx_ring->buffer_info[i]; 423 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 424 u1 = (struct my_u1 *)rx_desc; 425 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 426 427 if (i == rx_ring->next_to_use) 428 next_desc = " NTU"; 429 else if (i == rx_ring->next_to_clean) 430 next_desc = " NTC"; 431 else 432 next_desc = ""; 433 434 if (staterr & E1000_RXD_STAT_DD) { 435 /* Descriptor Done */ 436 pr_info("%s[0x%03X] %016llX %016llX ---------------- %p%s\n", 437 "RWB", i, 438 (unsigned long long)le64_to_cpu(u1->a), 439 (unsigned long long)le64_to_cpu(u1->b), 440 buffer_info->skb, next_desc); 441 } else { 442 pr_info("%s[0x%03X] %016llX %016llX %016llX %p%s\n", 443 "R ", i, 444 (unsigned long long)le64_to_cpu(u1->a), 445 (unsigned long long)le64_to_cpu(u1->b), 446 (unsigned long long)buffer_info->dma, 447 buffer_info->skb, next_desc); 448 449 if (netif_msg_pktdata(adapter) && 450 buffer_info->skb) 451 print_hex_dump(KERN_INFO, "", 452 DUMP_PREFIX_ADDRESS, 16, 453 1, 454 buffer_info->skb->data, 455 adapter->rx_buffer_len, 456 true); 457 } 458 } 459 } 460 } 461 462 /** 463 * e1000_desc_unused - calculate if we have unused descriptors 464 **/ 465 static int e1000_desc_unused(struct e1000_ring *ring) 466 { 467 if (ring->next_to_clean > ring->next_to_use) 468 return ring->next_to_clean - ring->next_to_use - 1; 469 470 return ring->count + ring->next_to_clean - ring->next_to_use - 1; 471 } 472 473 /** 474 * e1000e_systim_to_hwtstamp - convert system time value to hw time stamp 475 * @adapter: board private structure 476 * @hwtstamps: time stamp structure to update 477 * @systim: unsigned 64bit system time value. 478 * 479 * Convert the system time value stored in the RX/TXSTMP registers into a 480 * hwtstamp which can be used by the upper level time stamping functions. 481 * 482 * The 'systim_lock' spinlock is used to protect the consistency of the 483 * system time value. This is needed because reading the 64 bit time 484 * value involves reading two 32 bit registers. The first read latches the 485 * value. 486 **/ 487 static void e1000e_systim_to_hwtstamp(struct e1000_adapter *adapter, 488 struct skb_shared_hwtstamps *hwtstamps, 489 u64 systim) 490 { 491 u64 ns; 492 unsigned long flags; 493 494 spin_lock_irqsave(&adapter->systim_lock, flags); 495 ns = timecounter_cyc2time(&adapter->tc, systim); 496 spin_unlock_irqrestore(&adapter->systim_lock, flags); 497 498 memset(hwtstamps, 0, sizeof(*hwtstamps)); 499 hwtstamps->hwtstamp = ns_to_ktime(ns); 500 } 501 502 /** 503 * e1000e_rx_hwtstamp - utility function which checks for Rx time stamp 504 * @adapter: board private structure 505 * @status: descriptor extended error and status field 506 * @skb: particular skb to include time stamp 507 * 508 * If the time stamp is valid, convert it into the timecounter ns value 509 * and store that result into the shhwtstamps structure which is passed 510 * up the network stack. 511 **/ 512 static void e1000e_rx_hwtstamp(struct e1000_adapter *adapter, u32 status, 513 struct sk_buff *skb) 514 { 515 struct e1000_hw *hw = &adapter->hw; 516 u64 rxstmp; 517 518 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP) || 519 !(status & E1000_RXDEXT_STATERR_TST) || 520 !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID)) 521 return; 522 523 /* The Rx time stamp registers contain the time stamp. No other 524 * received packet will be time stamped until the Rx time stamp 525 * registers are read. Because only one packet can be time stamped 526 * at a time, the register values must belong to this packet and 527 * therefore none of the other additional attributes need to be 528 * compared. 529 */ 530 rxstmp = (u64)er32(RXSTMPL); 531 rxstmp |= (u64)er32(RXSTMPH) << 32; 532 e1000e_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), rxstmp); 533 534 adapter->flags2 &= ~FLAG2_CHECK_RX_HWTSTAMP; 535 } 536 537 /** 538 * e1000_receive_skb - helper function to handle Rx indications 539 * @adapter: board private structure 540 * @staterr: descriptor extended error and status field as written by hardware 541 * @vlan: descriptor vlan field as written by hardware (no le/be conversion) 542 * @skb: pointer to sk_buff to be indicated to stack 543 **/ 544 static void e1000_receive_skb(struct e1000_adapter *adapter, 545 struct net_device *netdev, struct sk_buff *skb, 546 u32 staterr, __le16 vlan) 547 { 548 u16 tag = le16_to_cpu(vlan); 549 550 e1000e_rx_hwtstamp(adapter, staterr, skb); 551 552 skb->protocol = eth_type_trans(skb, netdev); 553 554 if (staterr & E1000_RXD_STAT_VP) 555 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag); 556 557 napi_gro_receive(&adapter->napi, skb); 558 } 559 560 /** 561 * e1000_rx_checksum - Receive Checksum Offload 562 * @adapter: board private structure 563 * @status_err: receive descriptor status and error fields 564 * @csum: receive descriptor csum field 565 * @sk_buff: socket buffer with received data 566 **/ 567 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err, 568 struct sk_buff *skb) 569 { 570 u16 status = (u16)status_err; 571 u8 errors = (u8)(status_err >> 24); 572 573 skb_checksum_none_assert(skb); 574 575 /* Rx checksum disabled */ 576 if (!(adapter->netdev->features & NETIF_F_RXCSUM)) 577 return; 578 579 /* Ignore Checksum bit is set */ 580 if (status & E1000_RXD_STAT_IXSM) 581 return; 582 583 /* TCP/UDP checksum error bit or IP checksum error bit is set */ 584 if (errors & (E1000_RXD_ERR_TCPE | E1000_RXD_ERR_IPE)) { 585 /* let the stack verify checksum errors */ 586 adapter->hw_csum_err++; 587 return; 588 } 589 590 /* TCP/UDP Checksum has not been calculated */ 591 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))) 592 return; 593 594 /* It must be a TCP or UDP packet with a valid checksum */ 595 skb->ip_summed = CHECKSUM_UNNECESSARY; 596 adapter->hw_csum_good++; 597 } 598 599 static void e1000e_update_rdt_wa(struct e1000_ring *rx_ring, unsigned int i) 600 { 601 struct e1000_adapter *adapter = rx_ring->adapter; 602 struct e1000_hw *hw = &adapter->hw; 603 s32 ret_val = __ew32_prepare(hw); 604 605 writel(i, rx_ring->tail); 606 607 if (unlikely(!ret_val && (i != readl(rx_ring->tail)))) { 608 u32 rctl = er32(RCTL); 609 ew32(RCTL, rctl & ~E1000_RCTL_EN); 610 e_err("ME firmware caused invalid RDT - resetting\n"); 611 schedule_work(&adapter->reset_task); 612 } 613 } 614 615 static void e1000e_update_tdt_wa(struct e1000_ring *tx_ring, unsigned int i) 616 { 617 struct e1000_adapter *adapter = tx_ring->adapter; 618 struct e1000_hw *hw = &adapter->hw; 619 s32 ret_val = __ew32_prepare(hw); 620 621 writel(i, tx_ring->tail); 622 623 if (unlikely(!ret_val && (i != readl(tx_ring->tail)))) { 624 u32 tctl = er32(TCTL); 625 ew32(TCTL, tctl & ~E1000_TCTL_EN); 626 e_err("ME firmware caused invalid TDT - resetting\n"); 627 schedule_work(&adapter->reset_task); 628 } 629 } 630 631 /** 632 * e1000_alloc_rx_buffers - Replace used receive buffers 633 * @rx_ring: Rx descriptor ring 634 **/ 635 static void e1000_alloc_rx_buffers(struct e1000_ring *rx_ring, 636 int cleaned_count, gfp_t gfp) 637 { 638 struct e1000_adapter *adapter = rx_ring->adapter; 639 struct net_device *netdev = adapter->netdev; 640 struct pci_dev *pdev = adapter->pdev; 641 union e1000_rx_desc_extended *rx_desc; 642 struct e1000_buffer *buffer_info; 643 struct sk_buff *skb; 644 unsigned int i; 645 unsigned int bufsz = adapter->rx_buffer_len; 646 647 i = rx_ring->next_to_use; 648 buffer_info = &rx_ring->buffer_info[i]; 649 650 while (cleaned_count--) { 651 skb = buffer_info->skb; 652 if (skb) { 653 skb_trim(skb, 0); 654 goto map_skb; 655 } 656 657 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp); 658 if (!skb) { 659 /* Better luck next round */ 660 adapter->alloc_rx_buff_failed++; 661 break; 662 } 663 664 buffer_info->skb = skb; 665 map_skb: 666 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, 667 adapter->rx_buffer_len, 668 DMA_FROM_DEVICE); 669 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 670 dev_err(&pdev->dev, "Rx DMA map failed\n"); 671 adapter->rx_dma_failed++; 672 break; 673 } 674 675 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 676 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); 677 678 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) { 679 /* Force memory writes to complete before letting h/w 680 * know there are new descriptors to fetch. (Only 681 * applicable for weak-ordered memory model archs, 682 * such as IA-64). 683 */ 684 wmb(); 685 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 686 e1000e_update_rdt_wa(rx_ring, i); 687 else 688 writel(i, rx_ring->tail); 689 } 690 i++; 691 if (i == rx_ring->count) 692 i = 0; 693 buffer_info = &rx_ring->buffer_info[i]; 694 } 695 696 rx_ring->next_to_use = i; 697 } 698 699 /** 700 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split 701 * @rx_ring: Rx descriptor ring 702 **/ 703 static void e1000_alloc_rx_buffers_ps(struct e1000_ring *rx_ring, 704 int cleaned_count, gfp_t gfp) 705 { 706 struct e1000_adapter *adapter = rx_ring->adapter; 707 struct net_device *netdev = adapter->netdev; 708 struct pci_dev *pdev = adapter->pdev; 709 union e1000_rx_desc_packet_split *rx_desc; 710 struct e1000_buffer *buffer_info; 711 struct e1000_ps_page *ps_page; 712 struct sk_buff *skb; 713 unsigned int i, j; 714 715 i = rx_ring->next_to_use; 716 buffer_info = &rx_ring->buffer_info[i]; 717 718 while (cleaned_count--) { 719 rx_desc = E1000_RX_DESC_PS(*rx_ring, i); 720 721 for (j = 0; j < PS_PAGE_BUFFERS; j++) { 722 ps_page = &buffer_info->ps_pages[j]; 723 if (j >= adapter->rx_ps_pages) { 724 /* all unused desc entries get hw null ptr */ 725 rx_desc->read.buffer_addr[j + 1] = 726 ~cpu_to_le64(0); 727 continue; 728 } 729 if (!ps_page->page) { 730 ps_page->page = alloc_page(gfp); 731 if (!ps_page->page) { 732 adapter->alloc_rx_buff_failed++; 733 goto no_buffers; 734 } 735 ps_page->dma = dma_map_page(&pdev->dev, 736 ps_page->page, 737 0, PAGE_SIZE, 738 DMA_FROM_DEVICE); 739 if (dma_mapping_error(&pdev->dev, 740 ps_page->dma)) { 741 dev_err(&adapter->pdev->dev, 742 "Rx DMA page map failed\n"); 743 adapter->rx_dma_failed++; 744 goto no_buffers; 745 } 746 } 747 /* Refresh the desc even if buffer_addrs 748 * didn't change because each write-back 749 * erases this info. 750 */ 751 rx_desc->read.buffer_addr[j + 1] = 752 cpu_to_le64(ps_page->dma); 753 } 754 755 skb = __netdev_alloc_skb_ip_align(netdev, adapter->rx_ps_bsize0, 756 gfp); 757 758 if (!skb) { 759 adapter->alloc_rx_buff_failed++; 760 break; 761 } 762 763 buffer_info->skb = skb; 764 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, 765 adapter->rx_ps_bsize0, 766 DMA_FROM_DEVICE); 767 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 768 dev_err(&pdev->dev, "Rx DMA map failed\n"); 769 adapter->rx_dma_failed++; 770 /* cleanup skb */ 771 dev_kfree_skb_any(skb); 772 buffer_info->skb = NULL; 773 break; 774 } 775 776 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma); 777 778 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) { 779 /* Force memory writes to complete before letting h/w 780 * know there are new descriptors to fetch. (Only 781 * applicable for weak-ordered memory model archs, 782 * such as IA-64). 783 */ 784 wmb(); 785 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 786 e1000e_update_rdt_wa(rx_ring, i << 1); 787 else 788 writel(i << 1, rx_ring->tail); 789 } 790 791 i++; 792 if (i == rx_ring->count) 793 i = 0; 794 buffer_info = &rx_ring->buffer_info[i]; 795 } 796 797 no_buffers: 798 rx_ring->next_to_use = i; 799 } 800 801 /** 802 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers 803 * @rx_ring: Rx descriptor ring 804 * @cleaned_count: number of buffers to allocate this pass 805 **/ 806 807 static void e1000_alloc_jumbo_rx_buffers(struct e1000_ring *rx_ring, 808 int cleaned_count, gfp_t gfp) 809 { 810 struct e1000_adapter *adapter = rx_ring->adapter; 811 struct net_device *netdev = adapter->netdev; 812 struct pci_dev *pdev = adapter->pdev; 813 union e1000_rx_desc_extended *rx_desc; 814 struct e1000_buffer *buffer_info; 815 struct sk_buff *skb; 816 unsigned int i; 817 unsigned int bufsz = 256 - 16; /* for skb_reserve */ 818 819 i = rx_ring->next_to_use; 820 buffer_info = &rx_ring->buffer_info[i]; 821 822 while (cleaned_count--) { 823 skb = buffer_info->skb; 824 if (skb) { 825 skb_trim(skb, 0); 826 goto check_page; 827 } 828 829 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp); 830 if (unlikely(!skb)) { 831 /* Better luck next round */ 832 adapter->alloc_rx_buff_failed++; 833 break; 834 } 835 836 buffer_info->skb = skb; 837 check_page: 838 /* allocate a new page if necessary */ 839 if (!buffer_info->page) { 840 buffer_info->page = alloc_page(gfp); 841 if (unlikely(!buffer_info->page)) { 842 adapter->alloc_rx_buff_failed++; 843 break; 844 } 845 } 846 847 if (!buffer_info->dma) { 848 buffer_info->dma = dma_map_page(&pdev->dev, 849 buffer_info->page, 0, 850 PAGE_SIZE, 851 DMA_FROM_DEVICE); 852 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 853 adapter->alloc_rx_buff_failed++; 854 break; 855 } 856 } 857 858 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 859 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); 860 861 if (unlikely(++i == rx_ring->count)) 862 i = 0; 863 buffer_info = &rx_ring->buffer_info[i]; 864 } 865 866 if (likely(rx_ring->next_to_use != i)) { 867 rx_ring->next_to_use = i; 868 if (unlikely(i-- == 0)) 869 i = (rx_ring->count - 1); 870 871 /* Force memory writes to complete before letting h/w 872 * know there are new descriptors to fetch. (Only 873 * applicable for weak-ordered memory model archs, 874 * such as IA-64). 875 */ 876 wmb(); 877 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 878 e1000e_update_rdt_wa(rx_ring, i); 879 else 880 writel(i, rx_ring->tail); 881 } 882 } 883 884 static inline void e1000_rx_hash(struct net_device *netdev, __le32 rss, 885 struct sk_buff *skb) 886 { 887 if (netdev->features & NETIF_F_RXHASH) 888 skb->rxhash = le32_to_cpu(rss); 889 } 890 891 /** 892 * e1000_clean_rx_irq - Send received data up the network stack 893 * @rx_ring: Rx descriptor ring 894 * 895 * the return value indicates whether actual cleaning was done, there 896 * is no guarantee that everything was cleaned 897 **/ 898 static bool e1000_clean_rx_irq(struct e1000_ring *rx_ring, int *work_done, 899 int work_to_do) 900 { 901 struct e1000_adapter *adapter = rx_ring->adapter; 902 struct net_device *netdev = adapter->netdev; 903 struct pci_dev *pdev = adapter->pdev; 904 struct e1000_hw *hw = &adapter->hw; 905 union e1000_rx_desc_extended *rx_desc, *next_rxd; 906 struct e1000_buffer *buffer_info, *next_buffer; 907 u32 length, staterr; 908 unsigned int i; 909 int cleaned_count = 0; 910 bool cleaned = false; 911 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 912 913 i = rx_ring->next_to_clean; 914 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 915 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 916 buffer_info = &rx_ring->buffer_info[i]; 917 918 while (staterr & E1000_RXD_STAT_DD) { 919 struct sk_buff *skb; 920 921 if (*work_done >= work_to_do) 922 break; 923 (*work_done)++; 924 rmb(); /* read descriptor and rx_buffer_info after status DD */ 925 926 skb = buffer_info->skb; 927 buffer_info->skb = NULL; 928 929 prefetch(skb->data - NET_IP_ALIGN); 930 931 i++; 932 if (i == rx_ring->count) 933 i = 0; 934 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i); 935 prefetch(next_rxd); 936 937 next_buffer = &rx_ring->buffer_info[i]; 938 939 cleaned = true; 940 cleaned_count++; 941 dma_unmap_single(&pdev->dev, buffer_info->dma, 942 adapter->rx_buffer_len, DMA_FROM_DEVICE); 943 buffer_info->dma = 0; 944 945 length = le16_to_cpu(rx_desc->wb.upper.length); 946 947 /* !EOP means multiple descriptors were used to store a single 948 * packet, if that's the case we need to toss it. In fact, we 949 * need to toss every packet with the EOP bit clear and the 950 * next frame that _does_ have the EOP bit set, as it is by 951 * definition only a frame fragment 952 */ 953 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) 954 adapter->flags2 |= FLAG2_IS_DISCARDING; 955 956 if (adapter->flags2 & FLAG2_IS_DISCARDING) { 957 /* All receives must fit into a single buffer */ 958 e_dbg("Receive packet consumed multiple buffers\n"); 959 /* recycle */ 960 buffer_info->skb = skb; 961 if (staterr & E1000_RXD_STAT_EOP) 962 adapter->flags2 &= ~FLAG2_IS_DISCARDING; 963 goto next_desc; 964 } 965 966 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) && 967 !(netdev->features & NETIF_F_RXALL))) { 968 /* recycle */ 969 buffer_info->skb = skb; 970 goto next_desc; 971 } 972 973 /* adjust length to remove Ethernet CRC */ 974 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) { 975 /* If configured to store CRC, don't subtract FCS, 976 * but keep the FCS bytes out of the total_rx_bytes 977 * counter 978 */ 979 if (netdev->features & NETIF_F_RXFCS) 980 total_rx_bytes -= 4; 981 else 982 length -= 4; 983 } 984 985 total_rx_bytes += length; 986 total_rx_packets++; 987 988 /* code added for copybreak, this should improve 989 * performance for small packets with large amounts 990 * of reassembly being done in the stack 991 */ 992 if (length < copybreak) { 993 struct sk_buff *new_skb = 994 netdev_alloc_skb_ip_align(netdev, length); 995 if (new_skb) { 996 skb_copy_to_linear_data_offset(new_skb, 997 -NET_IP_ALIGN, 998 (skb->data - 999 NET_IP_ALIGN), 1000 (length + 1001 NET_IP_ALIGN)); 1002 /* save the skb in buffer_info as good */ 1003 buffer_info->skb = skb; 1004 skb = new_skb; 1005 } 1006 /* else just continue with the old one */ 1007 } 1008 /* end copybreak code */ 1009 skb_put(skb, length); 1010 1011 /* Receive Checksum Offload */ 1012 e1000_rx_checksum(adapter, staterr, skb); 1013 1014 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb); 1015 1016 e1000_receive_skb(adapter, netdev, skb, staterr, 1017 rx_desc->wb.upper.vlan); 1018 1019 next_desc: 1020 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF); 1021 1022 /* return some buffers to hardware, one at a time is too slow */ 1023 if (cleaned_count >= E1000_RX_BUFFER_WRITE) { 1024 adapter->alloc_rx_buf(rx_ring, cleaned_count, 1025 GFP_ATOMIC); 1026 cleaned_count = 0; 1027 } 1028 1029 /* use prefetched values */ 1030 rx_desc = next_rxd; 1031 buffer_info = next_buffer; 1032 1033 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 1034 } 1035 rx_ring->next_to_clean = i; 1036 1037 cleaned_count = e1000_desc_unused(rx_ring); 1038 if (cleaned_count) 1039 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC); 1040 1041 adapter->total_rx_bytes += total_rx_bytes; 1042 adapter->total_rx_packets += total_rx_packets; 1043 return cleaned; 1044 } 1045 1046 static void e1000_put_txbuf(struct e1000_ring *tx_ring, 1047 struct e1000_buffer *buffer_info) 1048 { 1049 struct e1000_adapter *adapter = tx_ring->adapter; 1050 1051 if (buffer_info->dma) { 1052 if (buffer_info->mapped_as_page) 1053 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, 1054 buffer_info->length, DMA_TO_DEVICE); 1055 else 1056 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma, 1057 buffer_info->length, DMA_TO_DEVICE); 1058 buffer_info->dma = 0; 1059 } 1060 if (buffer_info->skb) { 1061 dev_kfree_skb_any(buffer_info->skb); 1062 buffer_info->skb = NULL; 1063 } 1064 buffer_info->time_stamp = 0; 1065 } 1066 1067 static void e1000_print_hw_hang(struct work_struct *work) 1068 { 1069 struct e1000_adapter *adapter = container_of(work, 1070 struct e1000_adapter, 1071 print_hang_task); 1072 struct net_device *netdev = adapter->netdev; 1073 struct e1000_ring *tx_ring = adapter->tx_ring; 1074 unsigned int i = tx_ring->next_to_clean; 1075 unsigned int eop = tx_ring->buffer_info[i].next_to_watch; 1076 struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop); 1077 struct e1000_hw *hw = &adapter->hw; 1078 u16 phy_status, phy_1000t_status, phy_ext_status; 1079 u16 pci_status; 1080 1081 if (test_bit(__E1000_DOWN, &adapter->state)) 1082 return; 1083 1084 if (!adapter->tx_hang_recheck && (adapter->flags2 & FLAG2_DMA_BURST)) { 1085 /* May be block on write-back, flush and detect again 1086 * flush pending descriptor writebacks to memory 1087 */ 1088 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 1089 /* execute the writes immediately */ 1090 e1e_flush(); 1091 /* Due to rare timing issues, write to TIDV again to ensure 1092 * the write is successful 1093 */ 1094 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 1095 /* execute the writes immediately */ 1096 e1e_flush(); 1097 adapter->tx_hang_recheck = true; 1098 return; 1099 } 1100 /* Real hang detected */ 1101 adapter->tx_hang_recheck = false; 1102 netif_stop_queue(netdev); 1103 1104 e1e_rphy(hw, MII_BMSR, &phy_status); 1105 e1e_rphy(hw, MII_STAT1000, &phy_1000t_status); 1106 e1e_rphy(hw, MII_ESTATUS, &phy_ext_status); 1107 1108 pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status); 1109 1110 /* detected Hardware unit hang */ 1111 e_err("Detected Hardware Unit Hang:\n" 1112 " TDH <%x>\n" 1113 " TDT <%x>\n" 1114 " next_to_use <%x>\n" 1115 " next_to_clean <%x>\n" 1116 "buffer_info[next_to_clean]:\n" 1117 " time_stamp <%lx>\n" 1118 " next_to_watch <%x>\n" 1119 " jiffies <%lx>\n" 1120 " next_to_watch.status <%x>\n" 1121 "MAC Status <%x>\n" 1122 "PHY Status <%x>\n" 1123 "PHY 1000BASE-T Status <%x>\n" 1124 "PHY Extended Status <%x>\n" 1125 "PCI Status <%x>\n", 1126 readl(tx_ring->head), readl(tx_ring->tail), tx_ring->next_to_use, 1127 tx_ring->next_to_clean, tx_ring->buffer_info[eop].time_stamp, 1128 eop, jiffies, eop_desc->upper.fields.status, er32(STATUS), 1129 phy_status, phy_1000t_status, phy_ext_status, pci_status); 1130 1131 /* Suggest workaround for known h/w issue */ 1132 if ((hw->mac.type == e1000_pchlan) && (er32(CTRL) & E1000_CTRL_TFCE)) 1133 e_err("Try turning off Tx pause (flow control) via ethtool\n"); 1134 } 1135 1136 /** 1137 * e1000e_tx_hwtstamp_work - check for Tx time stamp 1138 * @work: pointer to work struct 1139 * 1140 * This work function polls the TSYNCTXCTL valid bit to determine when a 1141 * timestamp has been taken for the current stored skb. The timestamp must 1142 * be for this skb because only one such packet is allowed in the queue. 1143 */ 1144 static void e1000e_tx_hwtstamp_work(struct work_struct *work) 1145 { 1146 struct e1000_adapter *adapter = container_of(work, struct e1000_adapter, 1147 tx_hwtstamp_work); 1148 struct e1000_hw *hw = &adapter->hw; 1149 1150 if (!adapter->tx_hwtstamp_skb) 1151 return; 1152 1153 if (er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_VALID) { 1154 struct skb_shared_hwtstamps shhwtstamps; 1155 u64 txstmp; 1156 1157 txstmp = er32(TXSTMPL); 1158 txstmp |= (u64)er32(TXSTMPH) << 32; 1159 1160 e1000e_systim_to_hwtstamp(adapter, &shhwtstamps, txstmp); 1161 1162 skb_tstamp_tx(adapter->tx_hwtstamp_skb, &shhwtstamps); 1163 dev_kfree_skb_any(adapter->tx_hwtstamp_skb); 1164 adapter->tx_hwtstamp_skb = NULL; 1165 } else { 1166 /* reschedule to check later */ 1167 schedule_work(&adapter->tx_hwtstamp_work); 1168 } 1169 } 1170 1171 /** 1172 * e1000_clean_tx_irq - Reclaim resources after transmit completes 1173 * @tx_ring: Tx descriptor ring 1174 * 1175 * the return value indicates whether actual cleaning was done, there 1176 * is no guarantee that everything was cleaned 1177 **/ 1178 static bool e1000_clean_tx_irq(struct e1000_ring *tx_ring) 1179 { 1180 struct e1000_adapter *adapter = tx_ring->adapter; 1181 struct net_device *netdev = adapter->netdev; 1182 struct e1000_hw *hw = &adapter->hw; 1183 struct e1000_tx_desc *tx_desc, *eop_desc; 1184 struct e1000_buffer *buffer_info; 1185 unsigned int i, eop; 1186 unsigned int count = 0; 1187 unsigned int total_tx_bytes = 0, total_tx_packets = 0; 1188 unsigned int bytes_compl = 0, pkts_compl = 0; 1189 1190 i = tx_ring->next_to_clean; 1191 eop = tx_ring->buffer_info[i].next_to_watch; 1192 eop_desc = E1000_TX_DESC(*tx_ring, eop); 1193 1194 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) && 1195 (count < tx_ring->count)) { 1196 bool cleaned = false; 1197 rmb(); /* read buffer_info after eop_desc */ 1198 for (; !cleaned; count++) { 1199 tx_desc = E1000_TX_DESC(*tx_ring, i); 1200 buffer_info = &tx_ring->buffer_info[i]; 1201 cleaned = (i == eop); 1202 1203 if (cleaned) { 1204 total_tx_packets += buffer_info->segs; 1205 total_tx_bytes += buffer_info->bytecount; 1206 if (buffer_info->skb) { 1207 bytes_compl += buffer_info->skb->len; 1208 pkts_compl++; 1209 } 1210 } 1211 1212 e1000_put_txbuf(tx_ring, buffer_info); 1213 tx_desc->upper.data = 0; 1214 1215 i++; 1216 if (i == tx_ring->count) 1217 i = 0; 1218 } 1219 1220 if (i == tx_ring->next_to_use) 1221 break; 1222 eop = tx_ring->buffer_info[i].next_to_watch; 1223 eop_desc = E1000_TX_DESC(*tx_ring, eop); 1224 } 1225 1226 tx_ring->next_to_clean = i; 1227 1228 netdev_completed_queue(netdev, pkts_compl, bytes_compl); 1229 1230 #define TX_WAKE_THRESHOLD 32 1231 if (count && netif_carrier_ok(netdev) && 1232 e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) { 1233 /* Make sure that anybody stopping the queue after this 1234 * sees the new next_to_clean. 1235 */ 1236 smp_mb(); 1237 1238 if (netif_queue_stopped(netdev) && 1239 !(test_bit(__E1000_DOWN, &adapter->state))) { 1240 netif_wake_queue(netdev); 1241 ++adapter->restart_queue; 1242 } 1243 } 1244 1245 if (adapter->detect_tx_hung) { 1246 /* Detect a transmit hang in hardware, this serializes the 1247 * check with the clearing of time_stamp and movement of i 1248 */ 1249 adapter->detect_tx_hung = false; 1250 if (tx_ring->buffer_info[i].time_stamp && 1251 time_after(jiffies, tx_ring->buffer_info[i].time_stamp 1252 + (adapter->tx_timeout_factor * HZ)) && 1253 !(er32(STATUS) & E1000_STATUS_TXOFF)) 1254 schedule_work(&adapter->print_hang_task); 1255 else 1256 adapter->tx_hang_recheck = false; 1257 } 1258 adapter->total_tx_bytes += total_tx_bytes; 1259 adapter->total_tx_packets += total_tx_packets; 1260 return count < tx_ring->count; 1261 } 1262 1263 /** 1264 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split 1265 * @rx_ring: Rx descriptor ring 1266 * 1267 * the return value indicates whether actual cleaning was done, there 1268 * is no guarantee that everything was cleaned 1269 **/ 1270 static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done, 1271 int work_to_do) 1272 { 1273 struct e1000_adapter *adapter = rx_ring->adapter; 1274 struct e1000_hw *hw = &adapter->hw; 1275 union e1000_rx_desc_packet_split *rx_desc, *next_rxd; 1276 struct net_device *netdev = adapter->netdev; 1277 struct pci_dev *pdev = adapter->pdev; 1278 struct e1000_buffer *buffer_info, *next_buffer; 1279 struct e1000_ps_page *ps_page; 1280 struct sk_buff *skb; 1281 unsigned int i, j; 1282 u32 length, staterr; 1283 int cleaned_count = 0; 1284 bool cleaned = false; 1285 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 1286 1287 i = rx_ring->next_to_clean; 1288 rx_desc = E1000_RX_DESC_PS(*rx_ring, i); 1289 staterr = le32_to_cpu(rx_desc->wb.middle.status_error); 1290 buffer_info = &rx_ring->buffer_info[i]; 1291 1292 while (staterr & E1000_RXD_STAT_DD) { 1293 if (*work_done >= work_to_do) 1294 break; 1295 (*work_done)++; 1296 skb = buffer_info->skb; 1297 rmb(); /* read descriptor and rx_buffer_info after status DD */ 1298 1299 /* in the packet split case this is header only */ 1300 prefetch(skb->data - NET_IP_ALIGN); 1301 1302 i++; 1303 if (i == rx_ring->count) 1304 i = 0; 1305 next_rxd = E1000_RX_DESC_PS(*rx_ring, i); 1306 prefetch(next_rxd); 1307 1308 next_buffer = &rx_ring->buffer_info[i]; 1309 1310 cleaned = true; 1311 cleaned_count++; 1312 dma_unmap_single(&pdev->dev, buffer_info->dma, 1313 adapter->rx_ps_bsize0, DMA_FROM_DEVICE); 1314 buffer_info->dma = 0; 1315 1316 /* see !EOP comment in other Rx routine */ 1317 if (!(staterr & E1000_RXD_STAT_EOP)) 1318 adapter->flags2 |= FLAG2_IS_DISCARDING; 1319 1320 if (adapter->flags2 & FLAG2_IS_DISCARDING) { 1321 e_dbg("Packet Split buffers didn't pick up the full packet\n"); 1322 dev_kfree_skb_irq(skb); 1323 if (staterr & E1000_RXD_STAT_EOP) 1324 adapter->flags2 &= ~FLAG2_IS_DISCARDING; 1325 goto next_desc; 1326 } 1327 1328 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) && 1329 !(netdev->features & NETIF_F_RXALL))) { 1330 dev_kfree_skb_irq(skb); 1331 goto next_desc; 1332 } 1333 1334 length = le16_to_cpu(rx_desc->wb.middle.length0); 1335 1336 if (!length) { 1337 e_dbg("Last part of the packet spanning multiple descriptors\n"); 1338 dev_kfree_skb_irq(skb); 1339 goto next_desc; 1340 } 1341 1342 /* Good Receive */ 1343 skb_put(skb, length); 1344 1345 { 1346 /* this looks ugly, but it seems compiler issues make 1347 * it more efficient than reusing j 1348 */ 1349 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]); 1350 1351 /* page alloc/put takes too long and effects small 1352 * packet throughput, so unsplit small packets and 1353 * save the alloc/put only valid in softirq (napi) 1354 * context to call kmap_* 1355 */ 1356 if (l1 && (l1 <= copybreak) && 1357 ((length + l1) <= adapter->rx_ps_bsize0)) { 1358 u8 *vaddr; 1359 1360 ps_page = &buffer_info->ps_pages[0]; 1361 1362 /* there is no documentation about how to call 1363 * kmap_atomic, so we can't hold the mapping 1364 * very long 1365 */ 1366 dma_sync_single_for_cpu(&pdev->dev, 1367 ps_page->dma, 1368 PAGE_SIZE, 1369 DMA_FROM_DEVICE); 1370 vaddr = kmap_atomic(ps_page->page); 1371 memcpy(skb_tail_pointer(skb), vaddr, l1); 1372 kunmap_atomic(vaddr); 1373 dma_sync_single_for_device(&pdev->dev, 1374 ps_page->dma, 1375 PAGE_SIZE, 1376 DMA_FROM_DEVICE); 1377 1378 /* remove the CRC */ 1379 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) { 1380 if (!(netdev->features & NETIF_F_RXFCS)) 1381 l1 -= 4; 1382 } 1383 1384 skb_put(skb, l1); 1385 goto copydone; 1386 } /* if */ 1387 } 1388 1389 for (j = 0; j < PS_PAGE_BUFFERS; j++) { 1390 length = le16_to_cpu(rx_desc->wb.upper.length[j]); 1391 if (!length) 1392 break; 1393 1394 ps_page = &buffer_info->ps_pages[j]; 1395 dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE, 1396 DMA_FROM_DEVICE); 1397 ps_page->dma = 0; 1398 skb_fill_page_desc(skb, j, ps_page->page, 0, length); 1399 ps_page->page = NULL; 1400 skb->len += length; 1401 skb->data_len += length; 1402 skb->truesize += PAGE_SIZE; 1403 } 1404 1405 /* strip the ethernet crc, problem is we're using pages now so 1406 * this whole operation can get a little cpu intensive 1407 */ 1408 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) { 1409 if (!(netdev->features & NETIF_F_RXFCS)) 1410 pskb_trim(skb, skb->len - 4); 1411 } 1412 1413 copydone: 1414 total_rx_bytes += skb->len; 1415 total_rx_packets++; 1416 1417 e1000_rx_checksum(adapter, staterr, skb); 1418 1419 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb); 1420 1421 if (rx_desc->wb.upper.header_status & 1422 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)) 1423 adapter->rx_hdr_split++; 1424 1425 e1000_receive_skb(adapter, netdev, skb, staterr, 1426 rx_desc->wb.middle.vlan); 1427 1428 next_desc: 1429 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF); 1430 buffer_info->skb = NULL; 1431 1432 /* return some buffers to hardware, one at a time is too slow */ 1433 if (cleaned_count >= E1000_RX_BUFFER_WRITE) { 1434 adapter->alloc_rx_buf(rx_ring, cleaned_count, 1435 GFP_ATOMIC); 1436 cleaned_count = 0; 1437 } 1438 1439 /* use prefetched values */ 1440 rx_desc = next_rxd; 1441 buffer_info = next_buffer; 1442 1443 staterr = le32_to_cpu(rx_desc->wb.middle.status_error); 1444 } 1445 rx_ring->next_to_clean = i; 1446 1447 cleaned_count = e1000_desc_unused(rx_ring); 1448 if (cleaned_count) 1449 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC); 1450 1451 adapter->total_rx_bytes += total_rx_bytes; 1452 adapter->total_rx_packets += total_rx_packets; 1453 return cleaned; 1454 } 1455 1456 /** 1457 * e1000_consume_page - helper function 1458 **/ 1459 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb, 1460 u16 length) 1461 { 1462 bi->page = NULL; 1463 skb->len += length; 1464 skb->data_len += length; 1465 skb->truesize += PAGE_SIZE; 1466 } 1467 1468 /** 1469 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy 1470 * @adapter: board private structure 1471 * 1472 * the return value indicates whether actual cleaning was done, there 1473 * is no guarantee that everything was cleaned 1474 **/ 1475 static bool e1000_clean_jumbo_rx_irq(struct e1000_ring *rx_ring, int *work_done, 1476 int work_to_do) 1477 { 1478 struct e1000_adapter *adapter = rx_ring->adapter; 1479 struct net_device *netdev = adapter->netdev; 1480 struct pci_dev *pdev = adapter->pdev; 1481 union e1000_rx_desc_extended *rx_desc, *next_rxd; 1482 struct e1000_buffer *buffer_info, *next_buffer; 1483 u32 length, staterr; 1484 unsigned int i; 1485 int cleaned_count = 0; 1486 bool cleaned = false; 1487 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 1488 struct skb_shared_info *shinfo; 1489 1490 i = rx_ring->next_to_clean; 1491 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 1492 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 1493 buffer_info = &rx_ring->buffer_info[i]; 1494 1495 while (staterr & E1000_RXD_STAT_DD) { 1496 struct sk_buff *skb; 1497 1498 if (*work_done >= work_to_do) 1499 break; 1500 (*work_done)++; 1501 rmb(); /* read descriptor and rx_buffer_info after status DD */ 1502 1503 skb = buffer_info->skb; 1504 buffer_info->skb = NULL; 1505 1506 ++i; 1507 if (i == rx_ring->count) 1508 i = 0; 1509 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i); 1510 prefetch(next_rxd); 1511 1512 next_buffer = &rx_ring->buffer_info[i]; 1513 1514 cleaned = true; 1515 cleaned_count++; 1516 dma_unmap_page(&pdev->dev, buffer_info->dma, PAGE_SIZE, 1517 DMA_FROM_DEVICE); 1518 buffer_info->dma = 0; 1519 1520 length = le16_to_cpu(rx_desc->wb.upper.length); 1521 1522 /* errors is only valid for DD + EOP descriptors */ 1523 if (unlikely((staterr & E1000_RXD_STAT_EOP) && 1524 ((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) && 1525 !(netdev->features & NETIF_F_RXALL)))) { 1526 /* recycle both page and skb */ 1527 buffer_info->skb = skb; 1528 /* an error means any chain goes out the window too */ 1529 if (rx_ring->rx_skb_top) 1530 dev_kfree_skb_irq(rx_ring->rx_skb_top); 1531 rx_ring->rx_skb_top = NULL; 1532 goto next_desc; 1533 } 1534 #define rxtop (rx_ring->rx_skb_top) 1535 if (!(staterr & E1000_RXD_STAT_EOP)) { 1536 /* this descriptor is only the beginning (or middle) */ 1537 if (!rxtop) { 1538 /* this is the beginning of a chain */ 1539 rxtop = skb; 1540 skb_fill_page_desc(rxtop, 0, buffer_info->page, 1541 0, length); 1542 } else { 1543 /* this is the middle of a chain */ 1544 shinfo = skb_shinfo(rxtop); 1545 skb_fill_page_desc(rxtop, shinfo->nr_frags, 1546 buffer_info->page, 0, 1547 length); 1548 /* re-use the skb, only consumed the page */ 1549 buffer_info->skb = skb; 1550 } 1551 e1000_consume_page(buffer_info, rxtop, length); 1552 goto next_desc; 1553 } else { 1554 if (rxtop) { 1555 /* end of the chain */ 1556 shinfo = skb_shinfo(rxtop); 1557 skb_fill_page_desc(rxtop, shinfo->nr_frags, 1558 buffer_info->page, 0, 1559 length); 1560 /* re-use the current skb, we only consumed the 1561 * page 1562 */ 1563 buffer_info->skb = skb; 1564 skb = rxtop; 1565 rxtop = NULL; 1566 e1000_consume_page(buffer_info, skb, length); 1567 } else { 1568 /* no chain, got EOP, this buf is the packet 1569 * copybreak to save the put_page/alloc_page 1570 */ 1571 if (length <= copybreak && 1572 skb_tailroom(skb) >= length) { 1573 u8 *vaddr; 1574 vaddr = kmap_atomic(buffer_info->page); 1575 memcpy(skb_tail_pointer(skb), vaddr, 1576 length); 1577 kunmap_atomic(vaddr); 1578 /* re-use the page, so don't erase 1579 * buffer_info->page 1580 */ 1581 skb_put(skb, length); 1582 } else { 1583 skb_fill_page_desc(skb, 0, 1584 buffer_info->page, 0, 1585 length); 1586 e1000_consume_page(buffer_info, skb, 1587 length); 1588 } 1589 } 1590 } 1591 1592 /* Receive Checksum Offload */ 1593 e1000_rx_checksum(adapter, staterr, skb); 1594 1595 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb); 1596 1597 /* probably a little skewed due to removing CRC */ 1598 total_rx_bytes += skb->len; 1599 total_rx_packets++; 1600 1601 /* eth type trans needs skb->data to point to something */ 1602 if (!pskb_may_pull(skb, ETH_HLEN)) { 1603 e_err("pskb_may_pull failed.\n"); 1604 dev_kfree_skb_irq(skb); 1605 goto next_desc; 1606 } 1607 1608 e1000_receive_skb(adapter, netdev, skb, staterr, 1609 rx_desc->wb.upper.vlan); 1610 1611 next_desc: 1612 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF); 1613 1614 /* return some buffers to hardware, one at a time is too slow */ 1615 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { 1616 adapter->alloc_rx_buf(rx_ring, cleaned_count, 1617 GFP_ATOMIC); 1618 cleaned_count = 0; 1619 } 1620 1621 /* use prefetched values */ 1622 rx_desc = next_rxd; 1623 buffer_info = next_buffer; 1624 1625 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 1626 } 1627 rx_ring->next_to_clean = i; 1628 1629 cleaned_count = e1000_desc_unused(rx_ring); 1630 if (cleaned_count) 1631 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC); 1632 1633 adapter->total_rx_bytes += total_rx_bytes; 1634 adapter->total_rx_packets += total_rx_packets; 1635 return cleaned; 1636 } 1637 1638 /** 1639 * e1000_clean_rx_ring - Free Rx Buffers per Queue 1640 * @rx_ring: Rx descriptor ring 1641 **/ 1642 static void e1000_clean_rx_ring(struct e1000_ring *rx_ring) 1643 { 1644 struct e1000_adapter *adapter = rx_ring->adapter; 1645 struct e1000_buffer *buffer_info; 1646 struct e1000_ps_page *ps_page; 1647 struct pci_dev *pdev = adapter->pdev; 1648 unsigned int i, j; 1649 1650 /* Free all the Rx ring sk_buffs */ 1651 for (i = 0; i < rx_ring->count; i++) { 1652 buffer_info = &rx_ring->buffer_info[i]; 1653 if (buffer_info->dma) { 1654 if (adapter->clean_rx == e1000_clean_rx_irq) 1655 dma_unmap_single(&pdev->dev, buffer_info->dma, 1656 adapter->rx_buffer_len, 1657 DMA_FROM_DEVICE); 1658 else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq) 1659 dma_unmap_page(&pdev->dev, buffer_info->dma, 1660 PAGE_SIZE, DMA_FROM_DEVICE); 1661 else if (adapter->clean_rx == e1000_clean_rx_irq_ps) 1662 dma_unmap_single(&pdev->dev, buffer_info->dma, 1663 adapter->rx_ps_bsize0, 1664 DMA_FROM_DEVICE); 1665 buffer_info->dma = 0; 1666 } 1667 1668 if (buffer_info->page) { 1669 put_page(buffer_info->page); 1670 buffer_info->page = NULL; 1671 } 1672 1673 if (buffer_info->skb) { 1674 dev_kfree_skb(buffer_info->skb); 1675 buffer_info->skb = NULL; 1676 } 1677 1678 for (j = 0; j < PS_PAGE_BUFFERS; j++) { 1679 ps_page = &buffer_info->ps_pages[j]; 1680 if (!ps_page->page) 1681 break; 1682 dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE, 1683 DMA_FROM_DEVICE); 1684 ps_page->dma = 0; 1685 put_page(ps_page->page); 1686 ps_page->page = NULL; 1687 } 1688 } 1689 1690 /* there also may be some cached data from a chained receive */ 1691 if (rx_ring->rx_skb_top) { 1692 dev_kfree_skb(rx_ring->rx_skb_top); 1693 rx_ring->rx_skb_top = NULL; 1694 } 1695 1696 /* Zero out the descriptor ring */ 1697 memset(rx_ring->desc, 0, rx_ring->size); 1698 1699 rx_ring->next_to_clean = 0; 1700 rx_ring->next_to_use = 0; 1701 adapter->flags2 &= ~FLAG2_IS_DISCARDING; 1702 1703 writel(0, rx_ring->head); 1704 if (rx_ring->adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 1705 e1000e_update_rdt_wa(rx_ring, 0); 1706 else 1707 writel(0, rx_ring->tail); 1708 } 1709 1710 static void e1000e_downshift_workaround(struct work_struct *work) 1711 { 1712 struct e1000_adapter *adapter = container_of(work, 1713 struct e1000_adapter, 1714 downshift_task); 1715 1716 if (test_bit(__E1000_DOWN, &adapter->state)) 1717 return; 1718 1719 e1000e_gig_downshift_workaround_ich8lan(&adapter->hw); 1720 } 1721 1722 /** 1723 * e1000_intr_msi - Interrupt Handler 1724 * @irq: interrupt number 1725 * @data: pointer to a network interface device structure 1726 **/ 1727 static irqreturn_t e1000_intr_msi(int __always_unused irq, void *data) 1728 { 1729 struct net_device *netdev = data; 1730 struct e1000_adapter *adapter = netdev_priv(netdev); 1731 struct e1000_hw *hw = &adapter->hw; 1732 u32 icr = er32(ICR); 1733 1734 /* read ICR disables interrupts using IAM */ 1735 if (icr & E1000_ICR_LSC) { 1736 hw->mac.get_link_status = true; 1737 /* ICH8 workaround-- Call gig speed drop workaround on cable 1738 * disconnect (LSC) before accessing any PHY registers 1739 */ 1740 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) && 1741 (!(er32(STATUS) & E1000_STATUS_LU))) 1742 schedule_work(&adapter->downshift_task); 1743 1744 /* 80003ES2LAN workaround-- For packet buffer work-around on 1745 * link down event; disable receives here in the ISR and reset 1746 * adapter in watchdog 1747 */ 1748 if (netif_carrier_ok(netdev) && 1749 adapter->flags & FLAG_RX_NEEDS_RESTART) { 1750 /* disable receives */ 1751 u32 rctl = er32(RCTL); 1752 ew32(RCTL, rctl & ~E1000_RCTL_EN); 1753 adapter->flags |= FLAG_RESTART_NOW; 1754 } 1755 /* guard against interrupt when we're going down */ 1756 if (!test_bit(__E1000_DOWN, &adapter->state)) 1757 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1758 } 1759 1760 /* Reset on uncorrectable ECC error */ 1761 if ((icr & E1000_ICR_ECCER) && (hw->mac.type == e1000_pch_lpt)) { 1762 u32 pbeccsts = er32(PBECCSTS); 1763 1764 adapter->corr_errors += 1765 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK; 1766 adapter->uncorr_errors += 1767 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >> 1768 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT; 1769 1770 /* Do the reset outside of interrupt context */ 1771 schedule_work(&adapter->reset_task); 1772 1773 /* return immediately since reset is imminent */ 1774 return IRQ_HANDLED; 1775 } 1776 1777 if (napi_schedule_prep(&adapter->napi)) { 1778 adapter->total_tx_bytes = 0; 1779 adapter->total_tx_packets = 0; 1780 adapter->total_rx_bytes = 0; 1781 adapter->total_rx_packets = 0; 1782 __napi_schedule(&adapter->napi); 1783 } 1784 1785 return IRQ_HANDLED; 1786 } 1787 1788 /** 1789 * e1000_intr - Interrupt Handler 1790 * @irq: interrupt number 1791 * @data: pointer to a network interface device structure 1792 **/ 1793 static irqreturn_t e1000_intr(int __always_unused irq, void *data) 1794 { 1795 struct net_device *netdev = data; 1796 struct e1000_adapter *adapter = netdev_priv(netdev); 1797 struct e1000_hw *hw = &adapter->hw; 1798 u32 rctl, icr = er32(ICR); 1799 1800 if (!icr || test_bit(__E1000_DOWN, &adapter->state)) 1801 return IRQ_NONE; /* Not our interrupt */ 1802 1803 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is 1804 * not set, then the adapter didn't send an interrupt 1805 */ 1806 if (!(icr & E1000_ICR_INT_ASSERTED)) 1807 return IRQ_NONE; 1808 1809 /* Interrupt Auto-Mask...upon reading ICR, 1810 * interrupts are masked. No need for the 1811 * IMC write 1812 */ 1813 1814 if (icr & E1000_ICR_LSC) { 1815 hw->mac.get_link_status = true; 1816 /* ICH8 workaround-- Call gig speed drop workaround on cable 1817 * disconnect (LSC) before accessing any PHY registers 1818 */ 1819 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) && 1820 (!(er32(STATUS) & E1000_STATUS_LU))) 1821 schedule_work(&adapter->downshift_task); 1822 1823 /* 80003ES2LAN workaround-- 1824 * For packet buffer work-around on link down event; 1825 * disable receives here in the ISR and 1826 * reset adapter in watchdog 1827 */ 1828 if (netif_carrier_ok(netdev) && 1829 (adapter->flags & FLAG_RX_NEEDS_RESTART)) { 1830 /* disable receives */ 1831 rctl = er32(RCTL); 1832 ew32(RCTL, rctl & ~E1000_RCTL_EN); 1833 adapter->flags |= FLAG_RESTART_NOW; 1834 } 1835 /* guard against interrupt when we're going down */ 1836 if (!test_bit(__E1000_DOWN, &adapter->state)) 1837 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1838 } 1839 1840 /* Reset on uncorrectable ECC error */ 1841 if ((icr & E1000_ICR_ECCER) && (hw->mac.type == e1000_pch_lpt)) { 1842 u32 pbeccsts = er32(PBECCSTS); 1843 1844 adapter->corr_errors += 1845 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK; 1846 adapter->uncorr_errors += 1847 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >> 1848 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT; 1849 1850 /* Do the reset outside of interrupt context */ 1851 schedule_work(&adapter->reset_task); 1852 1853 /* return immediately since reset is imminent */ 1854 return IRQ_HANDLED; 1855 } 1856 1857 if (napi_schedule_prep(&adapter->napi)) { 1858 adapter->total_tx_bytes = 0; 1859 adapter->total_tx_packets = 0; 1860 adapter->total_rx_bytes = 0; 1861 adapter->total_rx_packets = 0; 1862 __napi_schedule(&adapter->napi); 1863 } 1864 1865 return IRQ_HANDLED; 1866 } 1867 1868 static irqreturn_t e1000_msix_other(int __always_unused irq, void *data) 1869 { 1870 struct net_device *netdev = data; 1871 struct e1000_adapter *adapter = netdev_priv(netdev); 1872 struct e1000_hw *hw = &adapter->hw; 1873 u32 icr = er32(ICR); 1874 1875 if (!(icr & E1000_ICR_INT_ASSERTED)) { 1876 if (!test_bit(__E1000_DOWN, &adapter->state)) 1877 ew32(IMS, E1000_IMS_OTHER); 1878 return IRQ_NONE; 1879 } 1880 1881 if (icr & adapter->eiac_mask) 1882 ew32(ICS, (icr & adapter->eiac_mask)); 1883 1884 if (icr & E1000_ICR_OTHER) { 1885 if (!(icr & E1000_ICR_LSC)) 1886 goto no_link_interrupt; 1887 hw->mac.get_link_status = true; 1888 /* guard against interrupt when we're going down */ 1889 if (!test_bit(__E1000_DOWN, &adapter->state)) 1890 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1891 } 1892 1893 no_link_interrupt: 1894 if (!test_bit(__E1000_DOWN, &adapter->state)) 1895 ew32(IMS, E1000_IMS_LSC | E1000_IMS_OTHER); 1896 1897 return IRQ_HANDLED; 1898 } 1899 1900 static irqreturn_t e1000_intr_msix_tx(int __always_unused irq, void *data) 1901 { 1902 struct net_device *netdev = data; 1903 struct e1000_adapter *adapter = netdev_priv(netdev); 1904 struct e1000_hw *hw = &adapter->hw; 1905 struct e1000_ring *tx_ring = adapter->tx_ring; 1906 1907 adapter->total_tx_bytes = 0; 1908 adapter->total_tx_packets = 0; 1909 1910 if (!e1000_clean_tx_irq(tx_ring)) 1911 /* Ring was not completely cleaned, so fire another interrupt */ 1912 ew32(ICS, tx_ring->ims_val); 1913 1914 return IRQ_HANDLED; 1915 } 1916 1917 static irqreturn_t e1000_intr_msix_rx(int __always_unused irq, void *data) 1918 { 1919 struct net_device *netdev = data; 1920 struct e1000_adapter *adapter = netdev_priv(netdev); 1921 struct e1000_ring *rx_ring = adapter->rx_ring; 1922 1923 /* Write the ITR value calculated at the end of the 1924 * previous interrupt. 1925 */ 1926 if (rx_ring->set_itr) { 1927 writel(1000000000 / (rx_ring->itr_val * 256), 1928 rx_ring->itr_register); 1929 rx_ring->set_itr = 0; 1930 } 1931 1932 if (napi_schedule_prep(&adapter->napi)) { 1933 adapter->total_rx_bytes = 0; 1934 adapter->total_rx_packets = 0; 1935 __napi_schedule(&adapter->napi); 1936 } 1937 return IRQ_HANDLED; 1938 } 1939 1940 /** 1941 * e1000_configure_msix - Configure MSI-X hardware 1942 * 1943 * e1000_configure_msix sets up the hardware to properly 1944 * generate MSI-X interrupts. 1945 **/ 1946 static void e1000_configure_msix(struct e1000_adapter *adapter) 1947 { 1948 struct e1000_hw *hw = &adapter->hw; 1949 struct e1000_ring *rx_ring = adapter->rx_ring; 1950 struct e1000_ring *tx_ring = adapter->tx_ring; 1951 int vector = 0; 1952 u32 ctrl_ext, ivar = 0; 1953 1954 adapter->eiac_mask = 0; 1955 1956 /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */ 1957 if (hw->mac.type == e1000_82574) { 1958 u32 rfctl = er32(RFCTL); 1959 rfctl |= E1000_RFCTL_ACK_DIS; 1960 ew32(RFCTL, rfctl); 1961 } 1962 1963 /* Configure Rx vector */ 1964 rx_ring->ims_val = E1000_IMS_RXQ0; 1965 adapter->eiac_mask |= rx_ring->ims_val; 1966 if (rx_ring->itr_val) 1967 writel(1000000000 / (rx_ring->itr_val * 256), 1968 rx_ring->itr_register); 1969 else 1970 writel(1, rx_ring->itr_register); 1971 ivar = E1000_IVAR_INT_ALLOC_VALID | vector; 1972 1973 /* Configure Tx vector */ 1974 tx_ring->ims_val = E1000_IMS_TXQ0; 1975 vector++; 1976 if (tx_ring->itr_val) 1977 writel(1000000000 / (tx_ring->itr_val * 256), 1978 tx_ring->itr_register); 1979 else 1980 writel(1, tx_ring->itr_register); 1981 adapter->eiac_mask |= tx_ring->ims_val; 1982 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8); 1983 1984 /* set vector for Other Causes, e.g. link changes */ 1985 vector++; 1986 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16); 1987 if (rx_ring->itr_val) 1988 writel(1000000000 / (rx_ring->itr_val * 256), 1989 hw->hw_addr + E1000_EITR_82574(vector)); 1990 else 1991 writel(1, hw->hw_addr + E1000_EITR_82574(vector)); 1992 1993 /* Cause Tx interrupts on every write back */ 1994 ivar |= (1 << 31); 1995 1996 ew32(IVAR, ivar); 1997 1998 /* enable MSI-X PBA support */ 1999 ctrl_ext = er32(CTRL_EXT); 2000 ctrl_ext |= E1000_CTRL_EXT_PBA_CLR; 2001 2002 /* Auto-Mask Other interrupts upon ICR read */ 2003 ew32(IAM, ~E1000_EIAC_MASK_82574 | E1000_IMS_OTHER); 2004 ctrl_ext |= E1000_CTRL_EXT_EIAME; 2005 ew32(CTRL_EXT, ctrl_ext); 2006 e1e_flush(); 2007 } 2008 2009 void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter) 2010 { 2011 if (adapter->msix_entries) { 2012 pci_disable_msix(adapter->pdev); 2013 kfree(adapter->msix_entries); 2014 adapter->msix_entries = NULL; 2015 } else if (adapter->flags & FLAG_MSI_ENABLED) { 2016 pci_disable_msi(adapter->pdev); 2017 adapter->flags &= ~FLAG_MSI_ENABLED; 2018 } 2019 } 2020 2021 /** 2022 * e1000e_set_interrupt_capability - set MSI or MSI-X if supported 2023 * 2024 * Attempt to configure interrupts using the best available 2025 * capabilities of the hardware and kernel. 2026 **/ 2027 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter) 2028 { 2029 int err; 2030 int i; 2031 2032 switch (adapter->int_mode) { 2033 case E1000E_INT_MODE_MSIX: 2034 if (adapter->flags & FLAG_HAS_MSIX) { 2035 adapter->num_vectors = 3; /* RxQ0, TxQ0 and other */ 2036 adapter->msix_entries = kcalloc(adapter->num_vectors, 2037 sizeof(struct 2038 msix_entry), 2039 GFP_KERNEL); 2040 if (adapter->msix_entries) { 2041 for (i = 0; i < adapter->num_vectors; i++) 2042 adapter->msix_entries[i].entry = i; 2043 2044 err = pci_enable_msix(adapter->pdev, 2045 adapter->msix_entries, 2046 adapter->num_vectors); 2047 if (err == 0) 2048 return; 2049 } 2050 /* MSI-X failed, so fall through and try MSI */ 2051 e_err("Failed to initialize MSI-X interrupts. Falling back to MSI interrupts.\n"); 2052 e1000e_reset_interrupt_capability(adapter); 2053 } 2054 adapter->int_mode = E1000E_INT_MODE_MSI; 2055 /* Fall through */ 2056 case E1000E_INT_MODE_MSI: 2057 if (!pci_enable_msi(adapter->pdev)) { 2058 adapter->flags |= FLAG_MSI_ENABLED; 2059 } else { 2060 adapter->int_mode = E1000E_INT_MODE_LEGACY; 2061 e_err("Failed to initialize MSI interrupts. Falling back to legacy interrupts.\n"); 2062 } 2063 /* Fall through */ 2064 case E1000E_INT_MODE_LEGACY: 2065 /* Don't do anything; this is the system default */ 2066 break; 2067 } 2068 2069 /* store the number of vectors being used */ 2070 adapter->num_vectors = 1; 2071 } 2072 2073 /** 2074 * e1000_request_msix - Initialize MSI-X interrupts 2075 * 2076 * e1000_request_msix allocates MSI-X vectors and requests interrupts from the 2077 * kernel. 2078 **/ 2079 static int e1000_request_msix(struct e1000_adapter *adapter) 2080 { 2081 struct net_device *netdev = adapter->netdev; 2082 int err = 0, vector = 0; 2083 2084 if (strlen(netdev->name) < (IFNAMSIZ - 5)) 2085 snprintf(adapter->rx_ring->name, 2086 sizeof(adapter->rx_ring->name) - 1, 2087 "%s-rx-0", netdev->name); 2088 else 2089 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ); 2090 err = request_irq(adapter->msix_entries[vector].vector, 2091 e1000_intr_msix_rx, 0, adapter->rx_ring->name, 2092 netdev); 2093 if (err) 2094 return err; 2095 adapter->rx_ring->itr_register = adapter->hw.hw_addr + 2096 E1000_EITR_82574(vector); 2097 adapter->rx_ring->itr_val = adapter->itr; 2098 vector++; 2099 2100 if (strlen(netdev->name) < (IFNAMSIZ - 5)) 2101 snprintf(adapter->tx_ring->name, 2102 sizeof(adapter->tx_ring->name) - 1, 2103 "%s-tx-0", netdev->name); 2104 else 2105 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ); 2106 err = request_irq(adapter->msix_entries[vector].vector, 2107 e1000_intr_msix_tx, 0, adapter->tx_ring->name, 2108 netdev); 2109 if (err) 2110 return err; 2111 adapter->tx_ring->itr_register = adapter->hw.hw_addr + 2112 E1000_EITR_82574(vector); 2113 adapter->tx_ring->itr_val = adapter->itr; 2114 vector++; 2115 2116 err = request_irq(adapter->msix_entries[vector].vector, 2117 e1000_msix_other, 0, netdev->name, netdev); 2118 if (err) 2119 return err; 2120 2121 e1000_configure_msix(adapter); 2122 2123 return 0; 2124 } 2125 2126 /** 2127 * e1000_request_irq - initialize interrupts 2128 * 2129 * Attempts to configure interrupts using the best available 2130 * capabilities of the hardware and kernel. 2131 **/ 2132 static int e1000_request_irq(struct e1000_adapter *adapter) 2133 { 2134 struct net_device *netdev = adapter->netdev; 2135 int err; 2136 2137 if (adapter->msix_entries) { 2138 err = e1000_request_msix(adapter); 2139 if (!err) 2140 return err; 2141 /* fall back to MSI */ 2142 e1000e_reset_interrupt_capability(adapter); 2143 adapter->int_mode = E1000E_INT_MODE_MSI; 2144 e1000e_set_interrupt_capability(adapter); 2145 } 2146 if (adapter->flags & FLAG_MSI_ENABLED) { 2147 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0, 2148 netdev->name, netdev); 2149 if (!err) 2150 return err; 2151 2152 /* fall back to legacy interrupt */ 2153 e1000e_reset_interrupt_capability(adapter); 2154 adapter->int_mode = E1000E_INT_MODE_LEGACY; 2155 } 2156 2157 err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED, 2158 netdev->name, netdev); 2159 if (err) 2160 e_err("Unable to allocate interrupt, Error: %d\n", err); 2161 2162 return err; 2163 } 2164 2165 static void e1000_free_irq(struct e1000_adapter *adapter) 2166 { 2167 struct net_device *netdev = adapter->netdev; 2168 2169 if (adapter->msix_entries) { 2170 int vector = 0; 2171 2172 free_irq(adapter->msix_entries[vector].vector, netdev); 2173 vector++; 2174 2175 free_irq(adapter->msix_entries[vector].vector, netdev); 2176 vector++; 2177 2178 /* Other Causes interrupt vector */ 2179 free_irq(adapter->msix_entries[vector].vector, netdev); 2180 return; 2181 } 2182 2183 free_irq(adapter->pdev->irq, netdev); 2184 } 2185 2186 /** 2187 * e1000_irq_disable - Mask off interrupt generation on the NIC 2188 **/ 2189 static void e1000_irq_disable(struct e1000_adapter *adapter) 2190 { 2191 struct e1000_hw *hw = &adapter->hw; 2192 2193 ew32(IMC, ~0); 2194 if (adapter->msix_entries) 2195 ew32(EIAC_82574, 0); 2196 e1e_flush(); 2197 2198 if (adapter->msix_entries) { 2199 int i; 2200 for (i = 0; i < adapter->num_vectors; i++) 2201 synchronize_irq(adapter->msix_entries[i].vector); 2202 } else { 2203 synchronize_irq(adapter->pdev->irq); 2204 } 2205 } 2206 2207 /** 2208 * e1000_irq_enable - Enable default interrupt generation settings 2209 **/ 2210 static void e1000_irq_enable(struct e1000_adapter *adapter) 2211 { 2212 struct e1000_hw *hw = &adapter->hw; 2213 2214 if (adapter->msix_entries) { 2215 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574); 2216 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC); 2217 } else if (hw->mac.type == e1000_pch_lpt) { 2218 ew32(IMS, IMS_ENABLE_MASK | E1000_IMS_ECCER); 2219 } else { 2220 ew32(IMS, IMS_ENABLE_MASK); 2221 } 2222 e1e_flush(); 2223 } 2224 2225 /** 2226 * e1000e_get_hw_control - get control of the h/w from f/w 2227 * @adapter: address of board private structure 2228 * 2229 * e1000e_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit. 2230 * For ASF and Pass Through versions of f/w this means that 2231 * the driver is loaded. For AMT version (only with 82573) 2232 * of the f/w this means that the network i/f is open. 2233 **/ 2234 void e1000e_get_hw_control(struct e1000_adapter *adapter) 2235 { 2236 struct e1000_hw *hw = &adapter->hw; 2237 u32 ctrl_ext; 2238 u32 swsm; 2239 2240 /* Let firmware know the driver has taken over */ 2241 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) { 2242 swsm = er32(SWSM); 2243 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD); 2244 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) { 2245 ctrl_ext = er32(CTRL_EXT); 2246 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD); 2247 } 2248 } 2249 2250 /** 2251 * e1000e_release_hw_control - release control of the h/w to f/w 2252 * @adapter: address of board private structure 2253 * 2254 * e1000e_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit. 2255 * For ASF and Pass Through versions of f/w this means that the 2256 * driver is no longer loaded. For AMT version (only with 82573) i 2257 * of the f/w this means that the network i/f is closed. 2258 * 2259 **/ 2260 void e1000e_release_hw_control(struct e1000_adapter *adapter) 2261 { 2262 struct e1000_hw *hw = &adapter->hw; 2263 u32 ctrl_ext; 2264 u32 swsm; 2265 2266 /* Let firmware taken over control of h/w */ 2267 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) { 2268 swsm = er32(SWSM); 2269 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD); 2270 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) { 2271 ctrl_ext = er32(CTRL_EXT); 2272 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD); 2273 } 2274 } 2275 2276 /** 2277 * e1000_alloc_ring_dma - allocate memory for a ring structure 2278 **/ 2279 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter, 2280 struct e1000_ring *ring) 2281 { 2282 struct pci_dev *pdev = adapter->pdev; 2283 2284 ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma, 2285 GFP_KERNEL); 2286 if (!ring->desc) 2287 return -ENOMEM; 2288 2289 return 0; 2290 } 2291 2292 /** 2293 * e1000e_setup_tx_resources - allocate Tx resources (Descriptors) 2294 * @tx_ring: Tx descriptor ring 2295 * 2296 * Return 0 on success, negative on failure 2297 **/ 2298 int e1000e_setup_tx_resources(struct e1000_ring *tx_ring) 2299 { 2300 struct e1000_adapter *adapter = tx_ring->adapter; 2301 int err = -ENOMEM, size; 2302 2303 size = sizeof(struct e1000_buffer) * tx_ring->count; 2304 tx_ring->buffer_info = vzalloc(size); 2305 if (!tx_ring->buffer_info) 2306 goto err; 2307 2308 /* round up to nearest 4K */ 2309 tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc); 2310 tx_ring->size = ALIGN(tx_ring->size, 4096); 2311 2312 err = e1000_alloc_ring_dma(adapter, tx_ring); 2313 if (err) 2314 goto err; 2315 2316 tx_ring->next_to_use = 0; 2317 tx_ring->next_to_clean = 0; 2318 2319 return 0; 2320 err: 2321 vfree(tx_ring->buffer_info); 2322 e_err("Unable to allocate memory for the transmit descriptor ring\n"); 2323 return err; 2324 } 2325 2326 /** 2327 * e1000e_setup_rx_resources - allocate Rx resources (Descriptors) 2328 * @rx_ring: Rx descriptor ring 2329 * 2330 * Returns 0 on success, negative on failure 2331 **/ 2332 int e1000e_setup_rx_resources(struct e1000_ring *rx_ring) 2333 { 2334 struct e1000_adapter *adapter = rx_ring->adapter; 2335 struct e1000_buffer *buffer_info; 2336 int i, size, desc_len, err = -ENOMEM; 2337 2338 size = sizeof(struct e1000_buffer) * rx_ring->count; 2339 rx_ring->buffer_info = vzalloc(size); 2340 if (!rx_ring->buffer_info) 2341 goto err; 2342 2343 for (i = 0; i < rx_ring->count; i++) { 2344 buffer_info = &rx_ring->buffer_info[i]; 2345 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS, 2346 sizeof(struct e1000_ps_page), 2347 GFP_KERNEL); 2348 if (!buffer_info->ps_pages) 2349 goto err_pages; 2350 } 2351 2352 desc_len = sizeof(union e1000_rx_desc_packet_split); 2353 2354 /* Round up to nearest 4K */ 2355 rx_ring->size = rx_ring->count * desc_len; 2356 rx_ring->size = ALIGN(rx_ring->size, 4096); 2357 2358 err = e1000_alloc_ring_dma(adapter, rx_ring); 2359 if (err) 2360 goto err_pages; 2361 2362 rx_ring->next_to_clean = 0; 2363 rx_ring->next_to_use = 0; 2364 rx_ring->rx_skb_top = NULL; 2365 2366 return 0; 2367 2368 err_pages: 2369 for (i = 0; i < rx_ring->count; i++) { 2370 buffer_info = &rx_ring->buffer_info[i]; 2371 kfree(buffer_info->ps_pages); 2372 } 2373 err: 2374 vfree(rx_ring->buffer_info); 2375 e_err("Unable to allocate memory for the receive descriptor ring\n"); 2376 return err; 2377 } 2378 2379 /** 2380 * e1000_clean_tx_ring - Free Tx Buffers 2381 * @tx_ring: Tx descriptor ring 2382 **/ 2383 static void e1000_clean_tx_ring(struct e1000_ring *tx_ring) 2384 { 2385 struct e1000_adapter *adapter = tx_ring->adapter; 2386 struct e1000_buffer *buffer_info; 2387 unsigned long size; 2388 unsigned int i; 2389 2390 for (i = 0; i < tx_ring->count; i++) { 2391 buffer_info = &tx_ring->buffer_info[i]; 2392 e1000_put_txbuf(tx_ring, buffer_info); 2393 } 2394 2395 netdev_reset_queue(adapter->netdev); 2396 size = sizeof(struct e1000_buffer) * tx_ring->count; 2397 memset(tx_ring->buffer_info, 0, size); 2398 2399 memset(tx_ring->desc, 0, tx_ring->size); 2400 2401 tx_ring->next_to_use = 0; 2402 tx_ring->next_to_clean = 0; 2403 2404 writel(0, tx_ring->head); 2405 if (tx_ring->adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 2406 e1000e_update_tdt_wa(tx_ring, 0); 2407 else 2408 writel(0, tx_ring->tail); 2409 } 2410 2411 /** 2412 * e1000e_free_tx_resources - Free Tx Resources per Queue 2413 * @tx_ring: Tx descriptor ring 2414 * 2415 * Free all transmit software resources 2416 **/ 2417 void e1000e_free_tx_resources(struct e1000_ring *tx_ring) 2418 { 2419 struct e1000_adapter *adapter = tx_ring->adapter; 2420 struct pci_dev *pdev = adapter->pdev; 2421 2422 e1000_clean_tx_ring(tx_ring); 2423 2424 vfree(tx_ring->buffer_info); 2425 tx_ring->buffer_info = NULL; 2426 2427 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, 2428 tx_ring->dma); 2429 tx_ring->desc = NULL; 2430 } 2431 2432 /** 2433 * e1000e_free_rx_resources - Free Rx Resources 2434 * @rx_ring: Rx descriptor ring 2435 * 2436 * Free all receive software resources 2437 **/ 2438 void e1000e_free_rx_resources(struct e1000_ring *rx_ring) 2439 { 2440 struct e1000_adapter *adapter = rx_ring->adapter; 2441 struct pci_dev *pdev = adapter->pdev; 2442 int i; 2443 2444 e1000_clean_rx_ring(rx_ring); 2445 2446 for (i = 0; i < rx_ring->count; i++) 2447 kfree(rx_ring->buffer_info[i].ps_pages); 2448 2449 vfree(rx_ring->buffer_info); 2450 rx_ring->buffer_info = NULL; 2451 2452 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, 2453 rx_ring->dma); 2454 rx_ring->desc = NULL; 2455 } 2456 2457 /** 2458 * e1000_update_itr - update the dynamic ITR value based on statistics 2459 * @adapter: pointer to adapter 2460 * @itr_setting: current adapter->itr 2461 * @packets: the number of packets during this measurement interval 2462 * @bytes: the number of bytes during this measurement interval 2463 * 2464 * Stores a new ITR value based on packets and byte 2465 * counts during the last interrupt. The advantage of per interrupt 2466 * computation is faster updates and more accurate ITR for the current 2467 * traffic pattern. Constants in this function were computed 2468 * based on theoretical maximum wire speed and thresholds were set based 2469 * on testing data as well as attempting to minimize response time 2470 * while increasing bulk throughput. This functionality is controlled 2471 * by the InterruptThrottleRate module parameter. 2472 **/ 2473 static unsigned int e1000_update_itr(u16 itr_setting, int packets, int bytes) 2474 { 2475 unsigned int retval = itr_setting; 2476 2477 if (packets == 0) 2478 return itr_setting; 2479 2480 switch (itr_setting) { 2481 case lowest_latency: 2482 /* handle TSO and jumbo frames */ 2483 if (bytes / packets > 8000) 2484 retval = bulk_latency; 2485 else if ((packets < 5) && (bytes > 512)) 2486 retval = low_latency; 2487 break; 2488 case low_latency: /* 50 usec aka 20000 ints/s */ 2489 if (bytes > 10000) { 2490 /* this if handles the TSO accounting */ 2491 if (bytes / packets > 8000) 2492 retval = bulk_latency; 2493 else if ((packets < 10) || ((bytes / packets) > 1200)) 2494 retval = bulk_latency; 2495 else if ((packets > 35)) 2496 retval = lowest_latency; 2497 } else if (bytes / packets > 2000) { 2498 retval = bulk_latency; 2499 } else if (packets <= 2 && bytes < 512) { 2500 retval = lowest_latency; 2501 } 2502 break; 2503 case bulk_latency: /* 250 usec aka 4000 ints/s */ 2504 if (bytes > 25000) { 2505 if (packets > 35) 2506 retval = low_latency; 2507 } else if (bytes < 6000) { 2508 retval = low_latency; 2509 } 2510 break; 2511 } 2512 2513 return retval; 2514 } 2515 2516 static void e1000_set_itr(struct e1000_adapter *adapter) 2517 { 2518 u16 current_itr; 2519 u32 new_itr = adapter->itr; 2520 2521 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */ 2522 if (adapter->link_speed != SPEED_1000) { 2523 current_itr = 0; 2524 new_itr = 4000; 2525 goto set_itr_now; 2526 } 2527 2528 if (adapter->flags2 & FLAG2_DISABLE_AIM) { 2529 new_itr = 0; 2530 goto set_itr_now; 2531 } 2532 2533 adapter->tx_itr = e1000_update_itr(adapter->tx_itr, 2534 adapter->total_tx_packets, 2535 adapter->total_tx_bytes); 2536 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 2537 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency) 2538 adapter->tx_itr = low_latency; 2539 2540 adapter->rx_itr = e1000_update_itr(adapter->rx_itr, 2541 adapter->total_rx_packets, 2542 adapter->total_rx_bytes); 2543 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 2544 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency) 2545 adapter->rx_itr = low_latency; 2546 2547 current_itr = max(adapter->rx_itr, adapter->tx_itr); 2548 2549 /* counts and packets in update_itr are dependent on these numbers */ 2550 switch (current_itr) { 2551 case lowest_latency: 2552 new_itr = 70000; 2553 break; 2554 case low_latency: 2555 new_itr = 20000; /* aka hwitr = ~200 */ 2556 break; 2557 case bulk_latency: 2558 new_itr = 4000; 2559 break; 2560 default: 2561 break; 2562 } 2563 2564 set_itr_now: 2565 if (new_itr != adapter->itr) { 2566 /* this attempts to bias the interrupt rate towards Bulk 2567 * by adding intermediate steps when interrupt rate is 2568 * increasing 2569 */ 2570 new_itr = new_itr > adapter->itr ? 2571 min(adapter->itr + (new_itr >> 2), new_itr) : new_itr; 2572 adapter->itr = new_itr; 2573 adapter->rx_ring->itr_val = new_itr; 2574 if (adapter->msix_entries) 2575 adapter->rx_ring->set_itr = 1; 2576 else 2577 e1000e_write_itr(adapter, new_itr); 2578 } 2579 } 2580 2581 /** 2582 * e1000e_write_itr - write the ITR value to the appropriate registers 2583 * @adapter: address of board private structure 2584 * @itr: new ITR value to program 2585 * 2586 * e1000e_write_itr determines if the adapter is in MSI-X mode 2587 * and, if so, writes the EITR registers with the ITR value. 2588 * Otherwise, it writes the ITR value into the ITR register. 2589 **/ 2590 void e1000e_write_itr(struct e1000_adapter *adapter, u32 itr) 2591 { 2592 struct e1000_hw *hw = &adapter->hw; 2593 u32 new_itr = itr ? 1000000000 / (itr * 256) : 0; 2594 2595 if (adapter->msix_entries) { 2596 int vector; 2597 2598 for (vector = 0; vector < adapter->num_vectors; vector++) 2599 writel(new_itr, hw->hw_addr + E1000_EITR_82574(vector)); 2600 } else { 2601 ew32(ITR, new_itr); 2602 } 2603 } 2604 2605 /** 2606 * e1000_alloc_queues - Allocate memory for all rings 2607 * @adapter: board private structure to initialize 2608 **/ 2609 static int e1000_alloc_queues(struct e1000_adapter *adapter) 2610 { 2611 int size = sizeof(struct e1000_ring); 2612 2613 adapter->tx_ring = kzalloc(size, GFP_KERNEL); 2614 if (!adapter->tx_ring) 2615 goto err; 2616 adapter->tx_ring->count = adapter->tx_ring_count; 2617 adapter->tx_ring->adapter = adapter; 2618 2619 adapter->rx_ring = kzalloc(size, GFP_KERNEL); 2620 if (!adapter->rx_ring) 2621 goto err; 2622 adapter->rx_ring->count = adapter->rx_ring_count; 2623 adapter->rx_ring->adapter = adapter; 2624 2625 return 0; 2626 err: 2627 e_err("Unable to allocate memory for queues\n"); 2628 kfree(adapter->rx_ring); 2629 kfree(adapter->tx_ring); 2630 return -ENOMEM; 2631 } 2632 2633 /** 2634 * e1000e_poll - NAPI Rx polling callback 2635 * @napi: struct associated with this polling callback 2636 * @weight: number of packets driver is allowed to process this poll 2637 **/ 2638 static int e1000e_poll(struct napi_struct *napi, int weight) 2639 { 2640 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, 2641 napi); 2642 struct e1000_hw *hw = &adapter->hw; 2643 struct net_device *poll_dev = adapter->netdev; 2644 int tx_cleaned = 1, work_done = 0; 2645 2646 adapter = netdev_priv(poll_dev); 2647 2648 if (!adapter->msix_entries || 2649 (adapter->rx_ring->ims_val & adapter->tx_ring->ims_val)) 2650 tx_cleaned = e1000_clean_tx_irq(adapter->tx_ring); 2651 2652 adapter->clean_rx(adapter->rx_ring, &work_done, weight); 2653 2654 if (!tx_cleaned) 2655 work_done = weight; 2656 2657 /* If weight not fully consumed, exit the polling mode */ 2658 if (work_done < weight) { 2659 if (adapter->itr_setting & 3) 2660 e1000_set_itr(adapter); 2661 napi_complete(napi); 2662 if (!test_bit(__E1000_DOWN, &adapter->state)) { 2663 if (adapter->msix_entries) 2664 ew32(IMS, adapter->rx_ring->ims_val); 2665 else 2666 e1000_irq_enable(adapter); 2667 } 2668 } 2669 2670 return work_done; 2671 } 2672 2673 static int e1000_vlan_rx_add_vid(struct net_device *netdev, 2674 __always_unused __be16 proto, u16 vid) 2675 { 2676 struct e1000_adapter *adapter = netdev_priv(netdev); 2677 struct e1000_hw *hw = &adapter->hw; 2678 u32 vfta, index; 2679 2680 /* don't update vlan cookie if already programmed */ 2681 if ((adapter->hw.mng_cookie.status & 2682 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) && 2683 (vid == adapter->mng_vlan_id)) 2684 return 0; 2685 2686 /* add VID to filter table */ 2687 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2688 index = (vid >> 5) & 0x7F; 2689 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index); 2690 vfta |= (1 << (vid & 0x1F)); 2691 hw->mac.ops.write_vfta(hw, index, vfta); 2692 } 2693 2694 set_bit(vid, adapter->active_vlans); 2695 2696 return 0; 2697 } 2698 2699 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, 2700 __always_unused __be16 proto, u16 vid) 2701 { 2702 struct e1000_adapter *adapter = netdev_priv(netdev); 2703 struct e1000_hw *hw = &adapter->hw; 2704 u32 vfta, index; 2705 2706 if ((adapter->hw.mng_cookie.status & 2707 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) && 2708 (vid == adapter->mng_vlan_id)) { 2709 /* release control to f/w */ 2710 e1000e_release_hw_control(adapter); 2711 return 0; 2712 } 2713 2714 /* remove VID from filter table */ 2715 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2716 index = (vid >> 5) & 0x7F; 2717 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index); 2718 vfta &= ~(1 << (vid & 0x1F)); 2719 hw->mac.ops.write_vfta(hw, index, vfta); 2720 } 2721 2722 clear_bit(vid, adapter->active_vlans); 2723 2724 return 0; 2725 } 2726 2727 /** 2728 * e1000e_vlan_filter_disable - helper to disable hw VLAN filtering 2729 * @adapter: board private structure to initialize 2730 **/ 2731 static void e1000e_vlan_filter_disable(struct e1000_adapter *adapter) 2732 { 2733 struct net_device *netdev = adapter->netdev; 2734 struct e1000_hw *hw = &adapter->hw; 2735 u32 rctl; 2736 2737 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2738 /* disable VLAN receive filtering */ 2739 rctl = er32(RCTL); 2740 rctl &= ~(E1000_RCTL_VFE | E1000_RCTL_CFIEN); 2741 ew32(RCTL, rctl); 2742 2743 if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) { 2744 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), 2745 adapter->mng_vlan_id); 2746 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; 2747 } 2748 } 2749 } 2750 2751 /** 2752 * e1000e_vlan_filter_enable - helper to enable HW VLAN filtering 2753 * @adapter: board private structure to initialize 2754 **/ 2755 static void e1000e_vlan_filter_enable(struct e1000_adapter *adapter) 2756 { 2757 struct e1000_hw *hw = &adapter->hw; 2758 u32 rctl; 2759 2760 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2761 /* enable VLAN receive filtering */ 2762 rctl = er32(RCTL); 2763 rctl |= E1000_RCTL_VFE; 2764 rctl &= ~E1000_RCTL_CFIEN; 2765 ew32(RCTL, rctl); 2766 } 2767 } 2768 2769 /** 2770 * e1000e_vlan_strip_enable - helper to disable HW VLAN stripping 2771 * @adapter: board private structure to initialize 2772 **/ 2773 static void e1000e_vlan_strip_disable(struct e1000_adapter *adapter) 2774 { 2775 struct e1000_hw *hw = &adapter->hw; 2776 u32 ctrl; 2777 2778 /* disable VLAN tag insert/strip */ 2779 ctrl = er32(CTRL); 2780 ctrl &= ~E1000_CTRL_VME; 2781 ew32(CTRL, ctrl); 2782 } 2783 2784 /** 2785 * e1000e_vlan_strip_enable - helper to enable HW VLAN stripping 2786 * @adapter: board private structure to initialize 2787 **/ 2788 static void e1000e_vlan_strip_enable(struct e1000_adapter *adapter) 2789 { 2790 struct e1000_hw *hw = &adapter->hw; 2791 u32 ctrl; 2792 2793 /* enable VLAN tag insert/strip */ 2794 ctrl = er32(CTRL); 2795 ctrl |= E1000_CTRL_VME; 2796 ew32(CTRL, ctrl); 2797 } 2798 2799 static void e1000_update_mng_vlan(struct e1000_adapter *adapter) 2800 { 2801 struct net_device *netdev = adapter->netdev; 2802 u16 vid = adapter->hw.mng_cookie.vlan_id; 2803 u16 old_vid = adapter->mng_vlan_id; 2804 2805 if (adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) { 2806 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid); 2807 adapter->mng_vlan_id = vid; 2808 } 2809 2810 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && (vid != old_vid)) 2811 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), old_vid); 2812 } 2813 2814 static void e1000_restore_vlan(struct e1000_adapter *adapter) 2815 { 2816 u16 vid; 2817 2818 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0); 2819 2820 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 2821 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid); 2822 } 2823 2824 static void e1000_init_manageability_pt(struct e1000_adapter *adapter) 2825 { 2826 struct e1000_hw *hw = &adapter->hw; 2827 u32 manc, manc2h, mdef, i, j; 2828 2829 if (!(adapter->flags & FLAG_MNG_PT_ENABLED)) 2830 return; 2831 2832 manc = er32(MANC); 2833 2834 /* enable receiving management packets to the host. this will probably 2835 * generate destination unreachable messages from the host OS, but 2836 * the packets will be handled on SMBUS 2837 */ 2838 manc |= E1000_MANC_EN_MNG2HOST; 2839 manc2h = er32(MANC2H); 2840 2841 switch (hw->mac.type) { 2842 default: 2843 manc2h |= (E1000_MANC2H_PORT_623 | E1000_MANC2H_PORT_664); 2844 break; 2845 case e1000_82574: 2846 case e1000_82583: 2847 /* Check if IPMI pass-through decision filter already exists; 2848 * if so, enable it. 2849 */ 2850 for (i = 0, j = 0; i < 8; i++) { 2851 mdef = er32(MDEF(i)); 2852 2853 /* Ignore filters with anything other than IPMI ports */ 2854 if (mdef & ~(E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664)) 2855 continue; 2856 2857 /* Enable this decision filter in MANC2H */ 2858 if (mdef) 2859 manc2h |= (1 << i); 2860 2861 j |= mdef; 2862 } 2863 2864 if (j == (E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664)) 2865 break; 2866 2867 /* Create new decision filter in an empty filter */ 2868 for (i = 0, j = 0; i < 8; i++) 2869 if (er32(MDEF(i)) == 0) { 2870 ew32(MDEF(i), (E1000_MDEF_PORT_623 | 2871 E1000_MDEF_PORT_664)); 2872 manc2h |= (1 << 1); 2873 j++; 2874 break; 2875 } 2876 2877 if (!j) 2878 e_warn("Unable to create IPMI pass-through filter\n"); 2879 break; 2880 } 2881 2882 ew32(MANC2H, manc2h); 2883 ew32(MANC, manc); 2884 } 2885 2886 /** 2887 * e1000_configure_tx - Configure Transmit Unit after Reset 2888 * @adapter: board private structure 2889 * 2890 * Configure the Tx unit of the MAC after a reset. 2891 **/ 2892 static void e1000_configure_tx(struct e1000_adapter *adapter) 2893 { 2894 struct e1000_hw *hw = &adapter->hw; 2895 struct e1000_ring *tx_ring = adapter->tx_ring; 2896 u64 tdba; 2897 u32 tdlen, tarc; 2898 2899 /* Setup the HW Tx Head and Tail descriptor pointers */ 2900 tdba = tx_ring->dma; 2901 tdlen = tx_ring->count * sizeof(struct e1000_tx_desc); 2902 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32))); 2903 ew32(TDBAH(0), (tdba >> 32)); 2904 ew32(TDLEN(0), tdlen); 2905 ew32(TDH(0), 0); 2906 ew32(TDT(0), 0); 2907 tx_ring->head = adapter->hw.hw_addr + E1000_TDH(0); 2908 tx_ring->tail = adapter->hw.hw_addr + E1000_TDT(0); 2909 2910 /* Set the Tx Interrupt Delay register */ 2911 ew32(TIDV, adapter->tx_int_delay); 2912 /* Tx irq moderation */ 2913 ew32(TADV, adapter->tx_abs_int_delay); 2914 2915 if (adapter->flags2 & FLAG2_DMA_BURST) { 2916 u32 txdctl = er32(TXDCTL(0)); 2917 txdctl &= ~(E1000_TXDCTL_PTHRESH | E1000_TXDCTL_HTHRESH | 2918 E1000_TXDCTL_WTHRESH); 2919 /* set up some performance related parameters to encourage the 2920 * hardware to use the bus more efficiently in bursts, depends 2921 * on the tx_int_delay to be enabled, 2922 * wthresh = 1 ==> burst write is disabled to avoid Tx stalls 2923 * hthresh = 1 ==> prefetch when one or more available 2924 * pthresh = 0x1f ==> prefetch if internal cache 31 or less 2925 * BEWARE: this seems to work but should be considered first if 2926 * there are Tx hangs or other Tx related bugs 2927 */ 2928 txdctl |= E1000_TXDCTL_DMA_BURST_ENABLE; 2929 ew32(TXDCTL(0), txdctl); 2930 } 2931 /* erratum work around: set txdctl the same for both queues */ 2932 ew32(TXDCTL(1), er32(TXDCTL(0))); 2933 2934 if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) { 2935 tarc = er32(TARC(0)); 2936 /* set the speed mode bit, we'll clear it if we're not at 2937 * gigabit link later 2938 */ 2939 #define SPEED_MODE_BIT (1 << 21) 2940 tarc |= SPEED_MODE_BIT; 2941 ew32(TARC(0), tarc); 2942 } 2943 2944 /* errata: program both queues to unweighted RR */ 2945 if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) { 2946 tarc = er32(TARC(0)); 2947 tarc |= 1; 2948 ew32(TARC(0), tarc); 2949 tarc = er32(TARC(1)); 2950 tarc |= 1; 2951 ew32(TARC(1), tarc); 2952 } 2953 2954 /* Setup Transmit Descriptor Settings for eop descriptor */ 2955 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS; 2956 2957 /* only set IDE if we are delaying interrupts using the timers */ 2958 if (adapter->tx_int_delay) 2959 adapter->txd_cmd |= E1000_TXD_CMD_IDE; 2960 2961 /* enable Report Status bit */ 2962 adapter->txd_cmd |= E1000_TXD_CMD_RS; 2963 2964 hw->mac.ops.config_collision_dist(hw); 2965 } 2966 2967 /** 2968 * e1000_setup_rctl - configure the receive control registers 2969 * @adapter: Board private structure 2970 **/ 2971 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \ 2972 (((S) & (PAGE_SIZE - 1)) ? 1 : 0)) 2973 static void e1000_setup_rctl(struct e1000_adapter *adapter) 2974 { 2975 struct e1000_hw *hw = &adapter->hw; 2976 u32 rctl, rfctl; 2977 u32 pages = 0; 2978 2979 /* Workaround Si errata on PCHx - configure jumbo frame flow */ 2980 if ((hw->mac.type >= e1000_pch2lan) && 2981 (adapter->netdev->mtu > ETH_DATA_LEN) && 2982 e1000_lv_jumbo_workaround_ich8lan(hw, true)) 2983 e_dbg("failed to enable jumbo frame workaround mode\n"); 2984 2985 /* Program MC offset vector base */ 2986 rctl = er32(RCTL); 2987 rctl &= ~(3 << E1000_RCTL_MO_SHIFT); 2988 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | 2989 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF | 2990 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT); 2991 2992 /* Do not Store bad packets */ 2993 rctl &= ~E1000_RCTL_SBP; 2994 2995 /* Enable Long Packet receive */ 2996 if (adapter->netdev->mtu <= ETH_DATA_LEN) 2997 rctl &= ~E1000_RCTL_LPE; 2998 else 2999 rctl |= E1000_RCTL_LPE; 3000 3001 /* Some systems expect that the CRC is included in SMBUS traffic. The 3002 * hardware strips the CRC before sending to both SMBUS (BMC) and to 3003 * host memory when this is enabled 3004 */ 3005 if (adapter->flags2 & FLAG2_CRC_STRIPPING) 3006 rctl |= E1000_RCTL_SECRC; 3007 3008 /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */ 3009 if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) { 3010 u16 phy_data; 3011 3012 e1e_rphy(hw, PHY_REG(770, 26), &phy_data); 3013 phy_data &= 0xfff8; 3014 phy_data |= (1 << 2); 3015 e1e_wphy(hw, PHY_REG(770, 26), phy_data); 3016 3017 e1e_rphy(hw, 22, &phy_data); 3018 phy_data &= 0x0fff; 3019 phy_data |= (1 << 14); 3020 e1e_wphy(hw, 0x10, 0x2823); 3021 e1e_wphy(hw, 0x11, 0x0003); 3022 e1e_wphy(hw, 22, phy_data); 3023 } 3024 3025 /* Setup buffer sizes */ 3026 rctl &= ~E1000_RCTL_SZ_4096; 3027 rctl |= E1000_RCTL_BSEX; 3028 switch (adapter->rx_buffer_len) { 3029 case 2048: 3030 default: 3031 rctl |= E1000_RCTL_SZ_2048; 3032 rctl &= ~E1000_RCTL_BSEX; 3033 break; 3034 case 4096: 3035 rctl |= E1000_RCTL_SZ_4096; 3036 break; 3037 case 8192: 3038 rctl |= E1000_RCTL_SZ_8192; 3039 break; 3040 case 16384: 3041 rctl |= E1000_RCTL_SZ_16384; 3042 break; 3043 } 3044 3045 /* Enable Extended Status in all Receive Descriptors */ 3046 rfctl = er32(RFCTL); 3047 rfctl |= E1000_RFCTL_EXTEN; 3048 ew32(RFCTL, rfctl); 3049 3050 /* 82571 and greater support packet-split where the protocol 3051 * header is placed in skb->data and the packet data is 3052 * placed in pages hanging off of skb_shinfo(skb)->nr_frags. 3053 * In the case of a non-split, skb->data is linearly filled, 3054 * followed by the page buffers. Therefore, skb->data is 3055 * sized to hold the largest protocol header. 3056 * 3057 * allocations using alloc_page take too long for regular MTU 3058 * so only enable packet split for jumbo frames 3059 * 3060 * Using pages when the page size is greater than 16k wastes 3061 * a lot of memory, since we allocate 3 pages at all times 3062 * per packet. 3063 */ 3064 pages = PAGE_USE_COUNT(adapter->netdev->mtu); 3065 if ((pages <= 3) && (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE)) 3066 adapter->rx_ps_pages = pages; 3067 else 3068 adapter->rx_ps_pages = 0; 3069 3070 if (adapter->rx_ps_pages) { 3071 u32 psrctl = 0; 3072 3073 /* Enable Packet split descriptors */ 3074 rctl |= E1000_RCTL_DTYP_PS; 3075 3076 psrctl |= adapter->rx_ps_bsize0 >> E1000_PSRCTL_BSIZE0_SHIFT; 3077 3078 switch (adapter->rx_ps_pages) { 3079 case 3: 3080 psrctl |= PAGE_SIZE << E1000_PSRCTL_BSIZE3_SHIFT; 3081 /* fall-through */ 3082 case 2: 3083 psrctl |= PAGE_SIZE << E1000_PSRCTL_BSIZE2_SHIFT; 3084 /* fall-through */ 3085 case 1: 3086 psrctl |= PAGE_SIZE >> E1000_PSRCTL_BSIZE1_SHIFT; 3087 break; 3088 } 3089 3090 ew32(PSRCTL, psrctl); 3091 } 3092 3093 /* This is useful for sniffing bad packets. */ 3094 if (adapter->netdev->features & NETIF_F_RXALL) { 3095 /* UPE and MPE will be handled by normal PROMISC logic 3096 * in e1000e_set_rx_mode 3097 */ 3098 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */ 3099 E1000_RCTL_BAM | /* RX All Bcast Pkts */ 3100 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */ 3101 3102 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */ 3103 E1000_RCTL_DPF | /* Allow filtered pause */ 3104 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */ 3105 /* Do not mess with E1000_CTRL_VME, it affects transmit as well, 3106 * and that breaks VLANs. 3107 */ 3108 } 3109 3110 ew32(RCTL, rctl); 3111 /* just started the receive unit, no need to restart */ 3112 adapter->flags &= ~FLAG_RESTART_NOW; 3113 } 3114 3115 /** 3116 * e1000_configure_rx - Configure Receive Unit after Reset 3117 * @adapter: board private structure 3118 * 3119 * Configure the Rx unit of the MAC after a reset. 3120 **/ 3121 static void e1000_configure_rx(struct e1000_adapter *adapter) 3122 { 3123 struct e1000_hw *hw = &adapter->hw; 3124 struct e1000_ring *rx_ring = adapter->rx_ring; 3125 u64 rdba; 3126 u32 rdlen, rctl, rxcsum, ctrl_ext; 3127 3128 if (adapter->rx_ps_pages) { 3129 /* this is a 32 byte descriptor */ 3130 rdlen = rx_ring->count * 3131 sizeof(union e1000_rx_desc_packet_split); 3132 adapter->clean_rx = e1000_clean_rx_irq_ps; 3133 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps; 3134 } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) { 3135 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended); 3136 adapter->clean_rx = e1000_clean_jumbo_rx_irq; 3137 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers; 3138 } else { 3139 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended); 3140 adapter->clean_rx = e1000_clean_rx_irq; 3141 adapter->alloc_rx_buf = e1000_alloc_rx_buffers; 3142 } 3143 3144 /* disable receives while setting up the descriptors */ 3145 rctl = er32(RCTL); 3146 if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX)) 3147 ew32(RCTL, rctl & ~E1000_RCTL_EN); 3148 e1e_flush(); 3149 usleep_range(10000, 20000); 3150 3151 if (adapter->flags2 & FLAG2_DMA_BURST) { 3152 /* set the writeback threshold (only takes effect if the RDTR 3153 * is set). set GRAN=1 and write back up to 0x4 worth, and 3154 * enable prefetching of 0x20 Rx descriptors 3155 * granularity = 01 3156 * wthresh = 04, 3157 * hthresh = 04, 3158 * pthresh = 0x20 3159 */ 3160 ew32(RXDCTL(0), E1000_RXDCTL_DMA_BURST_ENABLE); 3161 ew32(RXDCTL(1), E1000_RXDCTL_DMA_BURST_ENABLE); 3162 3163 /* override the delay timers for enabling bursting, only if 3164 * the value was not set by the user via module options 3165 */ 3166 if (adapter->rx_int_delay == DEFAULT_RDTR) 3167 adapter->rx_int_delay = BURST_RDTR; 3168 if (adapter->rx_abs_int_delay == DEFAULT_RADV) 3169 adapter->rx_abs_int_delay = BURST_RADV; 3170 } 3171 3172 /* set the Receive Delay Timer Register */ 3173 ew32(RDTR, adapter->rx_int_delay); 3174 3175 /* irq moderation */ 3176 ew32(RADV, adapter->rx_abs_int_delay); 3177 if ((adapter->itr_setting != 0) && (adapter->itr != 0)) 3178 e1000e_write_itr(adapter, adapter->itr); 3179 3180 ctrl_ext = er32(CTRL_EXT); 3181 /* Auto-Mask interrupts upon ICR access */ 3182 ctrl_ext |= E1000_CTRL_EXT_IAME; 3183 ew32(IAM, 0xffffffff); 3184 ew32(CTRL_EXT, ctrl_ext); 3185 e1e_flush(); 3186 3187 /* Setup the HW Rx Head and Tail Descriptor Pointers and 3188 * the Base and Length of the Rx Descriptor Ring 3189 */ 3190 rdba = rx_ring->dma; 3191 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32))); 3192 ew32(RDBAH(0), (rdba >> 32)); 3193 ew32(RDLEN(0), rdlen); 3194 ew32(RDH(0), 0); 3195 ew32(RDT(0), 0); 3196 rx_ring->head = adapter->hw.hw_addr + E1000_RDH(0); 3197 rx_ring->tail = adapter->hw.hw_addr + E1000_RDT(0); 3198 3199 /* Enable Receive Checksum Offload for TCP and UDP */ 3200 rxcsum = er32(RXCSUM); 3201 if (adapter->netdev->features & NETIF_F_RXCSUM) 3202 rxcsum |= E1000_RXCSUM_TUOFL; 3203 else 3204 rxcsum &= ~E1000_RXCSUM_TUOFL; 3205 ew32(RXCSUM, rxcsum); 3206 3207 /* With jumbo frames, excessive C-state transition latencies result 3208 * in dropped transactions. 3209 */ 3210 if (adapter->netdev->mtu > ETH_DATA_LEN) { 3211 u32 lat = 3212 ((er32(PBA) & E1000_PBA_RXA_MASK) * 1024 - 3213 adapter->max_frame_size) * 8 / 1000; 3214 3215 if (adapter->flags & FLAG_IS_ICH) { 3216 u32 rxdctl = er32(RXDCTL(0)); 3217 ew32(RXDCTL(0), rxdctl | 0x3); 3218 } 3219 3220 pm_qos_update_request(&adapter->netdev->pm_qos_req, lat); 3221 } else { 3222 pm_qos_update_request(&adapter->netdev->pm_qos_req, 3223 PM_QOS_DEFAULT_VALUE); 3224 } 3225 3226 /* Enable Receives */ 3227 ew32(RCTL, rctl); 3228 } 3229 3230 /** 3231 * e1000e_write_mc_addr_list - write multicast addresses to MTA 3232 * @netdev: network interface device structure 3233 * 3234 * Writes multicast address list to the MTA hash table. 3235 * Returns: -ENOMEM on failure 3236 * 0 on no addresses written 3237 * X on writing X addresses to MTA 3238 */ 3239 static int e1000e_write_mc_addr_list(struct net_device *netdev) 3240 { 3241 struct e1000_adapter *adapter = netdev_priv(netdev); 3242 struct e1000_hw *hw = &adapter->hw; 3243 struct netdev_hw_addr *ha; 3244 u8 *mta_list; 3245 int i; 3246 3247 if (netdev_mc_empty(netdev)) { 3248 /* nothing to program, so clear mc list */ 3249 hw->mac.ops.update_mc_addr_list(hw, NULL, 0); 3250 return 0; 3251 } 3252 3253 mta_list = kzalloc(netdev_mc_count(netdev) * ETH_ALEN, GFP_ATOMIC); 3254 if (!mta_list) 3255 return -ENOMEM; 3256 3257 /* update_mc_addr_list expects a packed array of only addresses. */ 3258 i = 0; 3259 netdev_for_each_mc_addr(ha, netdev) 3260 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN); 3261 3262 hw->mac.ops.update_mc_addr_list(hw, mta_list, i); 3263 kfree(mta_list); 3264 3265 return netdev_mc_count(netdev); 3266 } 3267 3268 /** 3269 * e1000e_write_uc_addr_list - write unicast addresses to RAR table 3270 * @netdev: network interface device structure 3271 * 3272 * Writes unicast address list to the RAR table. 3273 * Returns: -ENOMEM on failure/insufficient address space 3274 * 0 on no addresses written 3275 * X on writing X addresses to the RAR table 3276 **/ 3277 static int e1000e_write_uc_addr_list(struct net_device *netdev) 3278 { 3279 struct e1000_adapter *adapter = netdev_priv(netdev); 3280 struct e1000_hw *hw = &adapter->hw; 3281 unsigned int rar_entries = hw->mac.rar_entry_count; 3282 int count = 0; 3283 3284 /* save a rar entry for our hardware address */ 3285 rar_entries--; 3286 3287 /* save a rar entry for the LAA workaround */ 3288 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) 3289 rar_entries--; 3290 3291 /* return ENOMEM indicating insufficient memory for addresses */ 3292 if (netdev_uc_count(netdev) > rar_entries) 3293 return -ENOMEM; 3294 3295 if (!netdev_uc_empty(netdev) && rar_entries) { 3296 struct netdev_hw_addr *ha; 3297 3298 /* write the addresses in reverse order to avoid write 3299 * combining 3300 */ 3301 netdev_for_each_uc_addr(ha, netdev) { 3302 if (!rar_entries) 3303 break; 3304 hw->mac.ops.rar_set(hw, ha->addr, rar_entries--); 3305 count++; 3306 } 3307 } 3308 3309 /* zero out the remaining RAR entries not used above */ 3310 for (; rar_entries > 0; rar_entries--) { 3311 ew32(RAH(rar_entries), 0); 3312 ew32(RAL(rar_entries), 0); 3313 } 3314 e1e_flush(); 3315 3316 return count; 3317 } 3318 3319 /** 3320 * e1000e_set_rx_mode - secondary unicast, Multicast and Promiscuous mode set 3321 * @netdev: network interface device structure 3322 * 3323 * The ndo_set_rx_mode entry point is called whenever the unicast or multicast 3324 * address list or the network interface flags are updated. This routine is 3325 * responsible for configuring the hardware for proper unicast, multicast, 3326 * promiscuous mode, and all-multi behavior. 3327 **/ 3328 static void e1000e_set_rx_mode(struct net_device *netdev) 3329 { 3330 struct e1000_adapter *adapter = netdev_priv(netdev); 3331 struct e1000_hw *hw = &adapter->hw; 3332 u32 rctl; 3333 3334 /* Check for Promiscuous and All Multicast modes */ 3335 rctl = er32(RCTL); 3336 3337 /* clear the affected bits */ 3338 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE); 3339 3340 if (netdev->flags & IFF_PROMISC) { 3341 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE); 3342 /* Do not hardware filter VLANs in promisc mode */ 3343 e1000e_vlan_filter_disable(adapter); 3344 } else { 3345 int count; 3346 3347 if (netdev->flags & IFF_ALLMULTI) { 3348 rctl |= E1000_RCTL_MPE; 3349 } else { 3350 /* Write addresses to the MTA, if the attempt fails 3351 * then we should just turn on promiscuous mode so 3352 * that we can at least receive multicast traffic 3353 */ 3354 count = e1000e_write_mc_addr_list(netdev); 3355 if (count < 0) 3356 rctl |= E1000_RCTL_MPE; 3357 } 3358 e1000e_vlan_filter_enable(adapter); 3359 /* Write addresses to available RAR registers, if there is not 3360 * sufficient space to store all the addresses then enable 3361 * unicast promiscuous mode 3362 */ 3363 count = e1000e_write_uc_addr_list(netdev); 3364 if (count < 0) 3365 rctl |= E1000_RCTL_UPE; 3366 } 3367 3368 ew32(RCTL, rctl); 3369 3370 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) 3371 e1000e_vlan_strip_enable(adapter); 3372 else 3373 e1000e_vlan_strip_disable(adapter); 3374 } 3375 3376 static void e1000e_setup_rss_hash(struct e1000_adapter *adapter) 3377 { 3378 struct e1000_hw *hw = &adapter->hw; 3379 u32 mrqc, rxcsum; 3380 int i; 3381 static const u32 rsskey[10] = { 3382 0xda565a6d, 0xc20e5b25, 0x3d256741, 0xb08fa343, 0xcb2bcad0, 3383 0xb4307bae, 0xa32dcb77, 0x0cf23080, 0x3bb7426a, 0xfa01acbe 3384 }; 3385 3386 /* Fill out hash function seed */ 3387 for (i = 0; i < 10; i++) 3388 ew32(RSSRK(i), rsskey[i]); 3389 3390 /* Direct all traffic to queue 0 */ 3391 for (i = 0; i < 32; i++) 3392 ew32(RETA(i), 0); 3393 3394 /* Disable raw packet checksumming so that RSS hash is placed in 3395 * descriptor on writeback. 3396 */ 3397 rxcsum = er32(RXCSUM); 3398 rxcsum |= E1000_RXCSUM_PCSD; 3399 3400 ew32(RXCSUM, rxcsum); 3401 3402 mrqc = (E1000_MRQC_RSS_FIELD_IPV4 | 3403 E1000_MRQC_RSS_FIELD_IPV4_TCP | 3404 E1000_MRQC_RSS_FIELD_IPV6 | 3405 E1000_MRQC_RSS_FIELD_IPV6_TCP | 3406 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX); 3407 3408 ew32(MRQC, mrqc); 3409 } 3410 3411 /** 3412 * e1000e_get_base_timinca - get default SYSTIM time increment attributes 3413 * @adapter: board private structure 3414 * @timinca: pointer to returned time increment attributes 3415 * 3416 * Get attributes for incrementing the System Time Register SYSTIML/H at 3417 * the default base frequency, and set the cyclecounter shift value. 3418 **/ 3419 s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca) 3420 { 3421 struct e1000_hw *hw = &adapter->hw; 3422 u32 incvalue, incperiod, shift; 3423 3424 /* Make sure clock is enabled on I217 before checking the frequency */ 3425 if ((hw->mac.type == e1000_pch_lpt) && 3426 !(er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) && 3427 !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_ENABLED)) { 3428 u32 fextnvm7 = er32(FEXTNVM7); 3429 3430 if (!(fextnvm7 & (1 << 0))) { 3431 ew32(FEXTNVM7, fextnvm7 | (1 << 0)); 3432 e1e_flush(); 3433 } 3434 } 3435 3436 switch (hw->mac.type) { 3437 case e1000_pch2lan: 3438 case e1000_pch_lpt: 3439 /* On I217, the clock frequency is 25MHz or 96MHz as 3440 * indicated by the System Clock Frequency Indication 3441 */ 3442 if ((hw->mac.type != e1000_pch_lpt) || 3443 (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI)) { 3444 /* Stable 96MHz frequency */ 3445 incperiod = INCPERIOD_96MHz; 3446 incvalue = INCVALUE_96MHz; 3447 shift = INCVALUE_SHIFT_96MHz; 3448 adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHz; 3449 break; 3450 } 3451 /* fall-through */ 3452 case e1000_82574: 3453 case e1000_82583: 3454 /* Stable 25MHz frequency */ 3455 incperiod = INCPERIOD_25MHz; 3456 incvalue = INCVALUE_25MHz; 3457 shift = INCVALUE_SHIFT_25MHz; 3458 adapter->cc.shift = shift; 3459 break; 3460 default: 3461 return -EINVAL; 3462 } 3463 3464 *timinca = ((incperiod << E1000_TIMINCA_INCPERIOD_SHIFT) | 3465 ((incvalue << shift) & E1000_TIMINCA_INCVALUE_MASK)); 3466 3467 return 0; 3468 } 3469 3470 /** 3471 * e1000e_config_hwtstamp - configure the hwtstamp registers and enable/disable 3472 * @adapter: board private structure 3473 * 3474 * Outgoing time stamping can be enabled and disabled. Play nice and 3475 * disable it when requested, although it shouldn't cause any overhead 3476 * when no packet needs it. At most one packet in the queue may be 3477 * marked for time stamping, otherwise it would be impossible to tell 3478 * for sure to which packet the hardware time stamp belongs. 3479 * 3480 * Incoming time stamping has to be configured via the hardware filters. 3481 * Not all combinations are supported, in particular event type has to be 3482 * specified. Matching the kind of event packet is not supported, with the 3483 * exception of "all V2 events regardless of level 2 or 4". 3484 **/ 3485 static int e1000e_config_hwtstamp(struct e1000_adapter *adapter, 3486 struct hwtstamp_config *config) 3487 { 3488 struct e1000_hw *hw = &adapter->hw; 3489 u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED; 3490 u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED; 3491 u32 rxmtrl = 0; 3492 u16 rxudp = 0; 3493 bool is_l4 = false; 3494 bool is_l2 = false; 3495 u32 regval; 3496 s32 ret_val; 3497 3498 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP)) 3499 return -EINVAL; 3500 3501 /* flags reserved for future extensions - must be zero */ 3502 if (config->flags) 3503 return -EINVAL; 3504 3505 switch (config->tx_type) { 3506 case HWTSTAMP_TX_OFF: 3507 tsync_tx_ctl = 0; 3508 break; 3509 case HWTSTAMP_TX_ON: 3510 break; 3511 default: 3512 return -ERANGE; 3513 } 3514 3515 switch (config->rx_filter) { 3516 case HWTSTAMP_FILTER_NONE: 3517 tsync_rx_ctl = 0; 3518 break; 3519 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: 3520 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1; 3521 rxmtrl = E1000_RXMTRL_PTP_V1_SYNC_MESSAGE; 3522 is_l4 = true; 3523 break; 3524 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: 3525 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1; 3526 rxmtrl = E1000_RXMTRL_PTP_V1_DELAY_REQ_MESSAGE; 3527 is_l4 = true; 3528 break; 3529 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 3530 /* Also time stamps V2 L2 Path Delay Request/Response */ 3531 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2; 3532 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE; 3533 is_l2 = true; 3534 break; 3535 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 3536 /* Also time stamps V2 L2 Path Delay Request/Response. */ 3537 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2; 3538 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE; 3539 is_l2 = true; 3540 break; 3541 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 3542 /* Hardware cannot filter just V2 L4 Sync messages; 3543 * fall-through to V2 (both L2 and L4) Sync. 3544 */ 3545 case HWTSTAMP_FILTER_PTP_V2_SYNC: 3546 /* Also time stamps V2 Path Delay Request/Response. */ 3547 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2; 3548 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE; 3549 is_l2 = true; 3550 is_l4 = true; 3551 break; 3552 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 3553 /* Hardware cannot filter just V2 L4 Delay Request messages; 3554 * fall-through to V2 (both L2 and L4) Delay Request. 3555 */ 3556 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 3557 /* Also time stamps V2 Path Delay Request/Response. */ 3558 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2; 3559 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE; 3560 is_l2 = true; 3561 is_l4 = true; 3562 break; 3563 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 3564 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: 3565 /* Hardware cannot filter just V2 L4 or L2 Event messages; 3566 * fall-through to all V2 (both L2 and L4) Events. 3567 */ 3568 case HWTSTAMP_FILTER_PTP_V2_EVENT: 3569 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2; 3570 config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; 3571 is_l2 = true; 3572 is_l4 = true; 3573 break; 3574 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: 3575 /* For V1, the hardware can only filter Sync messages or 3576 * Delay Request messages but not both so fall-through to 3577 * time stamp all packets. 3578 */ 3579 case HWTSTAMP_FILTER_ALL: 3580 is_l2 = true; 3581 is_l4 = true; 3582 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL; 3583 config->rx_filter = HWTSTAMP_FILTER_ALL; 3584 break; 3585 default: 3586 return -ERANGE; 3587 } 3588 3589 adapter->hwtstamp_config = *config; 3590 3591 /* enable/disable Tx h/w time stamping */ 3592 regval = er32(TSYNCTXCTL); 3593 regval &= ~E1000_TSYNCTXCTL_ENABLED; 3594 regval |= tsync_tx_ctl; 3595 ew32(TSYNCTXCTL, regval); 3596 if ((er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) != 3597 (regval & E1000_TSYNCTXCTL_ENABLED)) { 3598 e_err("Timesync Tx Control register not set as expected\n"); 3599 return -EAGAIN; 3600 } 3601 3602 /* enable/disable Rx h/w time stamping */ 3603 regval = er32(TSYNCRXCTL); 3604 regval &= ~(E1000_TSYNCRXCTL_ENABLED | E1000_TSYNCRXCTL_TYPE_MASK); 3605 regval |= tsync_rx_ctl; 3606 ew32(TSYNCRXCTL, regval); 3607 if ((er32(TSYNCRXCTL) & (E1000_TSYNCRXCTL_ENABLED | 3608 E1000_TSYNCRXCTL_TYPE_MASK)) != 3609 (regval & (E1000_TSYNCRXCTL_ENABLED | 3610 E1000_TSYNCRXCTL_TYPE_MASK))) { 3611 e_err("Timesync Rx Control register not set as expected\n"); 3612 return -EAGAIN; 3613 } 3614 3615 /* L2: define ethertype filter for time stamped packets */ 3616 if (is_l2) 3617 rxmtrl |= ETH_P_1588; 3618 3619 /* define which PTP packets get time stamped */ 3620 ew32(RXMTRL, rxmtrl); 3621 3622 /* Filter by destination port */ 3623 if (is_l4) { 3624 rxudp = PTP_EV_PORT; 3625 cpu_to_be16s(&rxudp); 3626 } 3627 ew32(RXUDP, rxudp); 3628 3629 e1e_flush(); 3630 3631 /* Clear TSYNCRXCTL_VALID & TSYNCTXCTL_VALID bit */ 3632 er32(RXSTMPH); 3633 er32(TXSTMPH); 3634 3635 /* Get and set the System Time Register SYSTIM base frequency */ 3636 ret_val = e1000e_get_base_timinca(adapter, ®val); 3637 if (ret_val) 3638 return ret_val; 3639 ew32(TIMINCA, regval); 3640 3641 /* reset the ns time counter */ 3642 timecounter_init(&adapter->tc, &adapter->cc, 3643 ktime_to_ns(ktime_get_real())); 3644 3645 return 0; 3646 } 3647 3648 /** 3649 * e1000_configure - configure the hardware for Rx and Tx 3650 * @adapter: private board structure 3651 **/ 3652 static void e1000_configure(struct e1000_adapter *adapter) 3653 { 3654 struct e1000_ring *rx_ring = adapter->rx_ring; 3655 3656 e1000e_set_rx_mode(adapter->netdev); 3657 3658 e1000_restore_vlan(adapter); 3659 e1000_init_manageability_pt(adapter); 3660 3661 e1000_configure_tx(adapter); 3662 3663 if (adapter->netdev->features & NETIF_F_RXHASH) 3664 e1000e_setup_rss_hash(adapter); 3665 e1000_setup_rctl(adapter); 3666 e1000_configure_rx(adapter); 3667 adapter->alloc_rx_buf(rx_ring, e1000_desc_unused(rx_ring), GFP_KERNEL); 3668 } 3669 3670 /** 3671 * e1000e_power_up_phy - restore link in case the phy was powered down 3672 * @adapter: address of board private structure 3673 * 3674 * The phy may be powered down to save power and turn off link when the 3675 * driver is unloaded and wake on lan is not enabled (among others) 3676 * *** this routine MUST be followed by a call to e1000e_reset *** 3677 **/ 3678 void e1000e_power_up_phy(struct e1000_adapter *adapter) 3679 { 3680 if (adapter->hw.phy.ops.power_up) 3681 adapter->hw.phy.ops.power_up(&adapter->hw); 3682 3683 adapter->hw.mac.ops.setup_link(&adapter->hw); 3684 } 3685 3686 /** 3687 * e1000_power_down_phy - Power down the PHY 3688 * 3689 * Power down the PHY so no link is implied when interface is down. 3690 * The PHY cannot be powered down if management or WoL is active. 3691 */ 3692 static void e1000_power_down_phy(struct e1000_adapter *adapter) 3693 { 3694 /* WoL is enabled */ 3695 if (adapter->wol) 3696 return; 3697 3698 if (adapter->hw.phy.ops.power_down) 3699 adapter->hw.phy.ops.power_down(&adapter->hw); 3700 } 3701 3702 /** 3703 * e1000e_reset - bring the hardware into a known good state 3704 * 3705 * This function boots the hardware and enables some settings that 3706 * require a configuration cycle of the hardware - those cannot be 3707 * set/changed during runtime. After reset the device needs to be 3708 * properly configured for Rx, Tx etc. 3709 */ 3710 void e1000e_reset(struct e1000_adapter *adapter) 3711 { 3712 struct e1000_mac_info *mac = &adapter->hw.mac; 3713 struct e1000_fc_info *fc = &adapter->hw.fc; 3714 struct e1000_hw *hw = &adapter->hw; 3715 u32 tx_space, min_tx_space, min_rx_space; 3716 u32 pba = adapter->pba; 3717 u16 hwm; 3718 3719 /* reset Packet Buffer Allocation to default */ 3720 ew32(PBA, pba); 3721 3722 if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) { 3723 /* To maintain wire speed transmits, the Tx FIFO should be 3724 * large enough to accommodate two full transmit packets, 3725 * rounded up to the next 1KB and expressed in KB. Likewise, 3726 * the Rx FIFO should be large enough to accommodate at least 3727 * one full receive packet and is similarly rounded up and 3728 * expressed in KB. 3729 */ 3730 pba = er32(PBA); 3731 /* upper 16 bits has Tx packet buffer allocation size in KB */ 3732 tx_space = pba >> 16; 3733 /* lower 16 bits has Rx packet buffer allocation size in KB */ 3734 pba &= 0xffff; 3735 /* the Tx fifo also stores 16 bytes of information about the Tx 3736 * but don't include ethernet FCS because hardware appends it 3737 */ 3738 min_tx_space = (adapter->max_frame_size + 3739 sizeof(struct e1000_tx_desc) - ETH_FCS_LEN) * 2; 3740 min_tx_space = ALIGN(min_tx_space, 1024); 3741 min_tx_space >>= 10; 3742 /* software strips receive CRC, so leave room for it */ 3743 min_rx_space = adapter->max_frame_size; 3744 min_rx_space = ALIGN(min_rx_space, 1024); 3745 min_rx_space >>= 10; 3746 3747 /* If current Tx allocation is less than the min Tx FIFO size, 3748 * and the min Tx FIFO size is less than the current Rx FIFO 3749 * allocation, take space away from current Rx allocation 3750 */ 3751 if ((tx_space < min_tx_space) && 3752 ((min_tx_space - tx_space) < pba)) { 3753 pba -= min_tx_space - tx_space; 3754 3755 /* if short on Rx space, Rx wins and must trump Tx 3756 * adjustment 3757 */ 3758 if (pba < min_rx_space) 3759 pba = min_rx_space; 3760 } 3761 3762 ew32(PBA, pba); 3763 } 3764 3765 /* flow control settings 3766 * 3767 * The high water mark must be low enough to fit one full frame 3768 * (or the size used for early receive) above it in the Rx FIFO. 3769 * Set it to the lower of: 3770 * - 90% of the Rx FIFO size, and 3771 * - the full Rx FIFO size minus one full frame 3772 */ 3773 if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME) 3774 fc->pause_time = 0xFFFF; 3775 else 3776 fc->pause_time = E1000_FC_PAUSE_TIME; 3777 fc->send_xon = true; 3778 fc->current_mode = fc->requested_mode; 3779 3780 switch (hw->mac.type) { 3781 case e1000_ich9lan: 3782 case e1000_ich10lan: 3783 if (adapter->netdev->mtu > ETH_DATA_LEN) { 3784 pba = 14; 3785 ew32(PBA, pba); 3786 fc->high_water = 0x2800; 3787 fc->low_water = fc->high_water - 8; 3788 break; 3789 } 3790 /* fall-through */ 3791 default: 3792 hwm = min(((pba << 10) * 9 / 10), 3793 ((pba << 10) - adapter->max_frame_size)); 3794 3795 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */ 3796 fc->low_water = fc->high_water - 8; 3797 break; 3798 case e1000_pchlan: 3799 /* Workaround PCH LOM adapter hangs with certain network 3800 * loads. If hangs persist, try disabling Tx flow control. 3801 */ 3802 if (adapter->netdev->mtu > ETH_DATA_LEN) { 3803 fc->high_water = 0x3500; 3804 fc->low_water = 0x1500; 3805 } else { 3806 fc->high_water = 0x5000; 3807 fc->low_water = 0x3000; 3808 } 3809 fc->refresh_time = 0x1000; 3810 break; 3811 case e1000_pch2lan: 3812 case e1000_pch_lpt: 3813 fc->refresh_time = 0x0400; 3814 3815 if (adapter->netdev->mtu <= ETH_DATA_LEN) { 3816 fc->high_water = 0x05C20; 3817 fc->low_water = 0x05048; 3818 fc->pause_time = 0x0650; 3819 break; 3820 } 3821 3822 pba = 14; 3823 ew32(PBA, pba); 3824 fc->high_water = ((pba << 10) * 9 / 10) & E1000_FCRTH_RTH; 3825 fc->low_water = ((pba << 10) * 8 / 10) & E1000_FCRTL_RTL; 3826 break; 3827 } 3828 3829 /* Alignment of Tx data is on an arbitrary byte boundary with the 3830 * maximum size per Tx descriptor limited only to the transmit 3831 * allocation of the packet buffer minus 96 bytes with an upper 3832 * limit of 24KB due to receive synchronization limitations. 3833 */ 3834 adapter->tx_fifo_limit = min_t(u32, ((er32(PBA) >> 16) << 10) - 96, 3835 24 << 10); 3836 3837 /* Disable Adaptive Interrupt Moderation if 2 full packets cannot 3838 * fit in receive buffer. 3839 */ 3840 if (adapter->itr_setting & 0x3) { 3841 if ((adapter->max_frame_size * 2) > (pba << 10)) { 3842 if (!(adapter->flags2 & FLAG2_DISABLE_AIM)) { 3843 dev_info(&adapter->pdev->dev, 3844 "Interrupt Throttle Rate off\n"); 3845 adapter->flags2 |= FLAG2_DISABLE_AIM; 3846 e1000e_write_itr(adapter, 0); 3847 } 3848 } else if (adapter->flags2 & FLAG2_DISABLE_AIM) { 3849 dev_info(&adapter->pdev->dev, 3850 "Interrupt Throttle Rate on\n"); 3851 adapter->flags2 &= ~FLAG2_DISABLE_AIM; 3852 adapter->itr = 20000; 3853 e1000e_write_itr(adapter, adapter->itr); 3854 } 3855 } 3856 3857 /* Allow time for pending master requests to run */ 3858 mac->ops.reset_hw(hw); 3859 3860 /* For parts with AMT enabled, let the firmware know 3861 * that the network interface is in control 3862 */ 3863 if (adapter->flags & FLAG_HAS_AMT) 3864 e1000e_get_hw_control(adapter); 3865 3866 ew32(WUC, 0); 3867 3868 if (mac->ops.init_hw(hw)) 3869 e_err("Hardware Error\n"); 3870 3871 e1000_update_mng_vlan(adapter); 3872 3873 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ 3874 ew32(VET, ETH_P_8021Q); 3875 3876 e1000e_reset_adaptive(hw); 3877 3878 /* initialize systim and reset the ns time counter */ 3879 e1000e_config_hwtstamp(adapter, &adapter->hwtstamp_config); 3880 3881 /* Set EEE advertisement as appropriate */ 3882 if (adapter->flags2 & FLAG2_HAS_EEE) { 3883 s32 ret_val; 3884 u16 adv_addr; 3885 3886 switch (hw->phy.type) { 3887 case e1000_phy_82579: 3888 adv_addr = I82579_EEE_ADVERTISEMENT; 3889 break; 3890 case e1000_phy_i217: 3891 adv_addr = I217_EEE_ADVERTISEMENT; 3892 break; 3893 default: 3894 dev_err(&adapter->pdev->dev, 3895 "Invalid PHY type setting EEE advertisement\n"); 3896 return; 3897 } 3898 3899 ret_val = hw->phy.ops.acquire(hw); 3900 if (ret_val) { 3901 dev_err(&adapter->pdev->dev, 3902 "EEE advertisement - unable to acquire PHY\n"); 3903 return; 3904 } 3905 3906 e1000_write_emi_reg_locked(hw, adv_addr, 3907 hw->dev_spec.ich8lan.eee_disable ? 3908 0 : adapter->eee_advert); 3909 3910 hw->phy.ops.release(hw); 3911 } 3912 3913 if (!netif_running(adapter->netdev) && 3914 !test_bit(__E1000_TESTING, &adapter->state)) { 3915 e1000_power_down_phy(adapter); 3916 return; 3917 } 3918 3919 e1000_get_phy_info(hw); 3920 3921 if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) && 3922 !(adapter->flags & FLAG_SMART_POWER_DOWN)) { 3923 u16 phy_data = 0; 3924 /* speed up time to link by disabling smart power down, ignore 3925 * the return value of this function because there is nothing 3926 * different we would do if it failed 3927 */ 3928 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data); 3929 phy_data &= ~IGP02E1000_PM_SPD; 3930 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data); 3931 } 3932 } 3933 3934 int e1000e_up(struct e1000_adapter *adapter) 3935 { 3936 struct e1000_hw *hw = &adapter->hw; 3937 3938 /* hardware has been reset, we need to reload some things */ 3939 e1000_configure(adapter); 3940 3941 clear_bit(__E1000_DOWN, &adapter->state); 3942 3943 if (adapter->msix_entries) 3944 e1000_configure_msix(adapter); 3945 e1000_irq_enable(adapter); 3946 3947 netif_start_queue(adapter->netdev); 3948 3949 /* fire a link change interrupt to start the watchdog */ 3950 if (adapter->msix_entries) 3951 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER); 3952 else 3953 ew32(ICS, E1000_ICS_LSC); 3954 3955 return 0; 3956 } 3957 3958 static void e1000e_flush_descriptors(struct e1000_adapter *adapter) 3959 { 3960 struct e1000_hw *hw = &adapter->hw; 3961 3962 if (!(adapter->flags2 & FLAG2_DMA_BURST)) 3963 return; 3964 3965 /* flush pending descriptor writebacks to memory */ 3966 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 3967 ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD); 3968 3969 /* execute the writes immediately */ 3970 e1e_flush(); 3971 3972 /* due to rare timing issues, write to TIDV/RDTR again to ensure the 3973 * write is successful 3974 */ 3975 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 3976 ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD); 3977 3978 /* execute the writes immediately */ 3979 e1e_flush(); 3980 } 3981 3982 static void e1000e_update_stats(struct e1000_adapter *adapter); 3983 3984 void e1000e_down(struct e1000_adapter *adapter) 3985 { 3986 struct net_device *netdev = adapter->netdev; 3987 struct e1000_hw *hw = &adapter->hw; 3988 u32 tctl, rctl; 3989 3990 /* signal that we're down so the interrupt handler does not 3991 * reschedule our watchdog timer 3992 */ 3993 set_bit(__E1000_DOWN, &adapter->state); 3994 3995 /* disable receives in the hardware */ 3996 rctl = er32(RCTL); 3997 if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX)) 3998 ew32(RCTL, rctl & ~E1000_RCTL_EN); 3999 /* flush and sleep below */ 4000 4001 netif_stop_queue(netdev); 4002 4003 /* disable transmits in the hardware */ 4004 tctl = er32(TCTL); 4005 tctl &= ~E1000_TCTL_EN; 4006 ew32(TCTL, tctl); 4007 4008 /* flush both disables and wait for them to finish */ 4009 e1e_flush(); 4010 usleep_range(10000, 20000); 4011 4012 e1000_irq_disable(adapter); 4013 4014 napi_synchronize(&adapter->napi); 4015 4016 del_timer_sync(&adapter->watchdog_timer); 4017 del_timer_sync(&adapter->phy_info_timer); 4018 4019 netif_carrier_off(netdev); 4020 4021 spin_lock(&adapter->stats64_lock); 4022 e1000e_update_stats(adapter); 4023 spin_unlock(&adapter->stats64_lock); 4024 4025 e1000e_flush_descriptors(adapter); 4026 e1000_clean_tx_ring(adapter->tx_ring); 4027 e1000_clean_rx_ring(adapter->rx_ring); 4028 4029 adapter->link_speed = 0; 4030 adapter->link_duplex = 0; 4031 4032 /* Disable Si errata workaround on PCHx for jumbo frame flow */ 4033 if ((hw->mac.type >= e1000_pch2lan) && 4034 (adapter->netdev->mtu > ETH_DATA_LEN) && 4035 e1000_lv_jumbo_workaround_ich8lan(hw, false)) 4036 e_dbg("failed to disable jumbo frame workaround mode\n"); 4037 4038 if (!pci_channel_offline(adapter->pdev)) 4039 e1000e_reset(adapter); 4040 4041 /* TODO: for power management, we could drop the link and 4042 * pci_disable_device here. 4043 */ 4044 } 4045 4046 void e1000e_reinit_locked(struct e1000_adapter *adapter) 4047 { 4048 might_sleep(); 4049 while (test_and_set_bit(__E1000_RESETTING, &adapter->state)) 4050 usleep_range(1000, 2000); 4051 e1000e_down(adapter); 4052 e1000e_up(adapter); 4053 clear_bit(__E1000_RESETTING, &adapter->state); 4054 } 4055 4056 /** 4057 * e1000e_cyclecounter_read - read raw cycle counter (used by time counter) 4058 * @cc: cyclecounter structure 4059 **/ 4060 static cycle_t e1000e_cyclecounter_read(const struct cyclecounter *cc) 4061 { 4062 struct e1000_adapter *adapter = container_of(cc, struct e1000_adapter, 4063 cc); 4064 struct e1000_hw *hw = &adapter->hw; 4065 cycle_t systim; 4066 4067 /* latch SYSTIMH on read of SYSTIML */ 4068 systim = (cycle_t)er32(SYSTIML); 4069 systim |= (cycle_t)er32(SYSTIMH) << 32; 4070 4071 return systim; 4072 } 4073 4074 /** 4075 * e1000_sw_init - Initialize general software structures (struct e1000_adapter) 4076 * @adapter: board private structure to initialize 4077 * 4078 * e1000_sw_init initializes the Adapter private data structure. 4079 * Fields are initialized based on PCI device information and 4080 * OS network device settings (MTU size). 4081 **/ 4082 static int e1000_sw_init(struct e1000_adapter *adapter) 4083 { 4084 struct net_device *netdev = adapter->netdev; 4085 4086 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN; 4087 adapter->rx_ps_bsize0 = 128; 4088 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; 4089 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; 4090 adapter->tx_ring_count = E1000_DEFAULT_TXD; 4091 adapter->rx_ring_count = E1000_DEFAULT_RXD; 4092 4093 spin_lock_init(&adapter->stats64_lock); 4094 4095 e1000e_set_interrupt_capability(adapter); 4096 4097 if (e1000_alloc_queues(adapter)) 4098 return -ENOMEM; 4099 4100 /* Setup hardware time stamping cyclecounter */ 4101 if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) { 4102 adapter->cc.read = e1000e_cyclecounter_read; 4103 adapter->cc.mask = CLOCKSOURCE_MASK(64); 4104 adapter->cc.mult = 1; 4105 /* cc.shift set in e1000e_get_base_tininca() */ 4106 4107 spin_lock_init(&adapter->systim_lock); 4108 INIT_WORK(&adapter->tx_hwtstamp_work, e1000e_tx_hwtstamp_work); 4109 } 4110 4111 /* Explicitly disable IRQ since the NIC can be in any state. */ 4112 e1000_irq_disable(adapter); 4113 4114 set_bit(__E1000_DOWN, &adapter->state); 4115 return 0; 4116 } 4117 4118 /** 4119 * e1000_intr_msi_test - Interrupt Handler 4120 * @irq: interrupt number 4121 * @data: pointer to a network interface device structure 4122 **/ 4123 static irqreturn_t e1000_intr_msi_test(int __always_unused irq, void *data) 4124 { 4125 struct net_device *netdev = data; 4126 struct e1000_adapter *adapter = netdev_priv(netdev); 4127 struct e1000_hw *hw = &adapter->hw; 4128 u32 icr = er32(ICR); 4129 4130 e_dbg("icr is %08X\n", icr); 4131 if (icr & E1000_ICR_RXSEQ) { 4132 adapter->flags &= ~FLAG_MSI_TEST_FAILED; 4133 /* Force memory writes to complete before acknowledging the 4134 * interrupt is handled. 4135 */ 4136 wmb(); 4137 } 4138 4139 return IRQ_HANDLED; 4140 } 4141 4142 /** 4143 * e1000_test_msi_interrupt - Returns 0 for successful test 4144 * @adapter: board private struct 4145 * 4146 * code flow taken from tg3.c 4147 **/ 4148 static int e1000_test_msi_interrupt(struct e1000_adapter *adapter) 4149 { 4150 struct net_device *netdev = adapter->netdev; 4151 struct e1000_hw *hw = &adapter->hw; 4152 int err; 4153 4154 /* poll_enable hasn't been called yet, so don't need disable */ 4155 /* clear any pending events */ 4156 er32(ICR); 4157 4158 /* free the real vector and request a test handler */ 4159 e1000_free_irq(adapter); 4160 e1000e_reset_interrupt_capability(adapter); 4161 4162 /* Assume that the test fails, if it succeeds then the test 4163 * MSI irq handler will unset this flag 4164 */ 4165 adapter->flags |= FLAG_MSI_TEST_FAILED; 4166 4167 err = pci_enable_msi(adapter->pdev); 4168 if (err) 4169 goto msi_test_failed; 4170 4171 err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0, 4172 netdev->name, netdev); 4173 if (err) { 4174 pci_disable_msi(adapter->pdev); 4175 goto msi_test_failed; 4176 } 4177 4178 /* Force memory writes to complete before enabling and firing an 4179 * interrupt. 4180 */ 4181 wmb(); 4182 4183 e1000_irq_enable(adapter); 4184 4185 /* fire an unusual interrupt on the test handler */ 4186 ew32(ICS, E1000_ICS_RXSEQ); 4187 e1e_flush(); 4188 msleep(100); 4189 4190 e1000_irq_disable(adapter); 4191 4192 rmb(); /* read flags after interrupt has been fired */ 4193 4194 if (adapter->flags & FLAG_MSI_TEST_FAILED) { 4195 adapter->int_mode = E1000E_INT_MODE_LEGACY; 4196 e_info("MSI interrupt test failed, using legacy interrupt.\n"); 4197 } else { 4198 e_dbg("MSI interrupt test succeeded!\n"); 4199 } 4200 4201 free_irq(adapter->pdev->irq, netdev); 4202 pci_disable_msi(adapter->pdev); 4203 4204 msi_test_failed: 4205 e1000e_set_interrupt_capability(adapter); 4206 return e1000_request_irq(adapter); 4207 } 4208 4209 /** 4210 * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored 4211 * @adapter: board private struct 4212 * 4213 * code flow taken from tg3.c, called with e1000 interrupts disabled. 4214 **/ 4215 static int e1000_test_msi(struct e1000_adapter *adapter) 4216 { 4217 int err; 4218 u16 pci_cmd; 4219 4220 if (!(adapter->flags & FLAG_MSI_ENABLED)) 4221 return 0; 4222 4223 /* disable SERR in case the MSI write causes a master abort */ 4224 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd); 4225 if (pci_cmd & PCI_COMMAND_SERR) 4226 pci_write_config_word(adapter->pdev, PCI_COMMAND, 4227 pci_cmd & ~PCI_COMMAND_SERR); 4228 4229 err = e1000_test_msi_interrupt(adapter); 4230 4231 /* re-enable SERR */ 4232 if (pci_cmd & PCI_COMMAND_SERR) { 4233 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd); 4234 pci_cmd |= PCI_COMMAND_SERR; 4235 pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd); 4236 } 4237 4238 return err; 4239 } 4240 4241 /** 4242 * e1000_open - Called when a network interface is made active 4243 * @netdev: network interface device structure 4244 * 4245 * Returns 0 on success, negative value on failure 4246 * 4247 * The open entry point is called when a network interface is made 4248 * active by the system (IFF_UP). At this point all resources needed 4249 * for transmit and receive operations are allocated, the interrupt 4250 * handler is registered with the OS, the watchdog timer is started, 4251 * and the stack is notified that the interface is ready. 4252 **/ 4253 static int e1000_open(struct net_device *netdev) 4254 { 4255 struct e1000_adapter *adapter = netdev_priv(netdev); 4256 struct e1000_hw *hw = &adapter->hw; 4257 struct pci_dev *pdev = adapter->pdev; 4258 int err; 4259 4260 /* disallow open during test */ 4261 if (test_bit(__E1000_TESTING, &adapter->state)) 4262 return -EBUSY; 4263 4264 pm_runtime_get_sync(&pdev->dev); 4265 4266 netif_carrier_off(netdev); 4267 4268 /* allocate transmit descriptors */ 4269 err = e1000e_setup_tx_resources(adapter->tx_ring); 4270 if (err) 4271 goto err_setup_tx; 4272 4273 /* allocate receive descriptors */ 4274 err = e1000e_setup_rx_resources(adapter->rx_ring); 4275 if (err) 4276 goto err_setup_rx; 4277 4278 /* If AMT is enabled, let the firmware know that the network 4279 * interface is now open and reset the part to a known state. 4280 */ 4281 if (adapter->flags & FLAG_HAS_AMT) { 4282 e1000e_get_hw_control(adapter); 4283 e1000e_reset(adapter); 4284 } 4285 4286 e1000e_power_up_phy(adapter); 4287 4288 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; 4289 if ((adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN)) 4290 e1000_update_mng_vlan(adapter); 4291 4292 /* DMA latency requirement to workaround jumbo issue */ 4293 pm_qos_add_request(&adapter->netdev->pm_qos_req, PM_QOS_CPU_DMA_LATENCY, 4294 PM_QOS_DEFAULT_VALUE); 4295 4296 /* before we allocate an interrupt, we must be ready to handle it. 4297 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt 4298 * as soon as we call pci_request_irq, so we have to setup our 4299 * clean_rx handler before we do so. 4300 */ 4301 e1000_configure(adapter); 4302 4303 err = e1000_request_irq(adapter); 4304 if (err) 4305 goto err_req_irq; 4306 4307 /* Work around PCIe errata with MSI interrupts causing some chipsets to 4308 * ignore e1000e MSI messages, which means we need to test our MSI 4309 * interrupt now 4310 */ 4311 if (adapter->int_mode != E1000E_INT_MODE_LEGACY) { 4312 err = e1000_test_msi(adapter); 4313 if (err) { 4314 e_err("Interrupt allocation failed\n"); 4315 goto err_req_irq; 4316 } 4317 } 4318 4319 /* From here on the code is the same as e1000e_up() */ 4320 clear_bit(__E1000_DOWN, &adapter->state); 4321 4322 napi_enable(&adapter->napi); 4323 4324 e1000_irq_enable(adapter); 4325 4326 adapter->tx_hang_recheck = false; 4327 netif_start_queue(netdev); 4328 4329 adapter->idle_check = true; 4330 hw->mac.get_link_status = true; 4331 pm_runtime_put(&pdev->dev); 4332 4333 /* fire a link status change interrupt to start the watchdog */ 4334 if (adapter->msix_entries) 4335 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER); 4336 else 4337 ew32(ICS, E1000_ICS_LSC); 4338 4339 return 0; 4340 4341 err_req_irq: 4342 e1000e_release_hw_control(adapter); 4343 e1000_power_down_phy(adapter); 4344 e1000e_free_rx_resources(adapter->rx_ring); 4345 err_setup_rx: 4346 e1000e_free_tx_resources(adapter->tx_ring); 4347 err_setup_tx: 4348 e1000e_reset(adapter); 4349 pm_runtime_put_sync(&pdev->dev); 4350 4351 return err; 4352 } 4353 4354 /** 4355 * e1000_close - Disables a network interface 4356 * @netdev: network interface device structure 4357 * 4358 * Returns 0, this is not allowed to fail 4359 * 4360 * The close entry point is called when an interface is de-activated 4361 * by the OS. The hardware is still under the drivers control, but 4362 * needs to be disabled. A global MAC reset is issued to stop the 4363 * hardware, and all transmit and receive resources are freed. 4364 **/ 4365 static int e1000_close(struct net_device *netdev) 4366 { 4367 struct e1000_adapter *adapter = netdev_priv(netdev); 4368 struct pci_dev *pdev = adapter->pdev; 4369 int count = E1000_CHECK_RESET_COUNT; 4370 4371 while (test_bit(__E1000_RESETTING, &adapter->state) && count--) 4372 usleep_range(10000, 20000); 4373 4374 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state)); 4375 4376 pm_runtime_get_sync(&pdev->dev); 4377 4378 if (!test_bit(__E1000_DOWN, &adapter->state)) { 4379 e1000e_down(adapter); 4380 e1000_free_irq(adapter); 4381 } 4382 4383 napi_disable(&adapter->napi); 4384 4385 e1000_power_down_phy(adapter); 4386 4387 e1000e_free_tx_resources(adapter->tx_ring); 4388 e1000e_free_rx_resources(adapter->rx_ring); 4389 4390 /* kill manageability vlan ID if supported, but not if a vlan with 4391 * the same ID is registered on the host OS (let 8021q kill it) 4392 */ 4393 if (adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) 4394 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), 4395 adapter->mng_vlan_id); 4396 4397 /* If AMT is enabled, let the firmware know that the network 4398 * interface is now closed 4399 */ 4400 if ((adapter->flags & FLAG_HAS_AMT) && 4401 !test_bit(__E1000_TESTING, &adapter->state)) 4402 e1000e_release_hw_control(adapter); 4403 4404 pm_qos_remove_request(&adapter->netdev->pm_qos_req); 4405 4406 pm_runtime_put_sync(&pdev->dev); 4407 4408 return 0; 4409 } 4410 4411 /** 4412 * e1000_set_mac - Change the Ethernet Address of the NIC 4413 * @netdev: network interface device structure 4414 * @p: pointer to an address structure 4415 * 4416 * Returns 0 on success, negative on failure 4417 **/ 4418 static int e1000_set_mac(struct net_device *netdev, void *p) 4419 { 4420 struct e1000_adapter *adapter = netdev_priv(netdev); 4421 struct e1000_hw *hw = &adapter->hw; 4422 struct sockaddr *addr = p; 4423 4424 if (!is_valid_ether_addr(addr->sa_data)) 4425 return -EADDRNOTAVAIL; 4426 4427 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 4428 memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len); 4429 4430 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 0); 4431 4432 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) { 4433 /* activate the work around */ 4434 e1000e_set_laa_state_82571(&adapter->hw, 1); 4435 4436 /* Hold a copy of the LAA in RAR[14] This is done so that 4437 * between the time RAR[0] gets clobbered and the time it 4438 * gets fixed (in e1000_watchdog), the actual LAA is in one 4439 * of the RARs and no incoming packets directed to this port 4440 * are dropped. Eventually the LAA will be in RAR[0] and 4441 * RAR[14] 4442 */ 4443 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 4444 adapter->hw.mac.rar_entry_count - 1); 4445 } 4446 4447 return 0; 4448 } 4449 4450 /** 4451 * e1000e_update_phy_task - work thread to update phy 4452 * @work: pointer to our work struct 4453 * 4454 * this worker thread exists because we must acquire a 4455 * semaphore to read the phy, which we could msleep while 4456 * waiting for it, and we can't msleep in a timer. 4457 **/ 4458 static void e1000e_update_phy_task(struct work_struct *work) 4459 { 4460 struct e1000_adapter *adapter = container_of(work, 4461 struct e1000_adapter, 4462 update_phy_task); 4463 4464 if (test_bit(__E1000_DOWN, &adapter->state)) 4465 return; 4466 4467 e1000_get_phy_info(&adapter->hw); 4468 } 4469 4470 /** 4471 * e1000_update_phy_info - timre call-back to update PHY info 4472 * @data: pointer to adapter cast into an unsigned long 4473 * 4474 * Need to wait a few seconds after link up to get diagnostic information from 4475 * the phy 4476 **/ 4477 static void e1000_update_phy_info(unsigned long data) 4478 { 4479 struct e1000_adapter *adapter = (struct e1000_adapter *)data; 4480 4481 if (test_bit(__E1000_DOWN, &adapter->state)) 4482 return; 4483 4484 schedule_work(&adapter->update_phy_task); 4485 } 4486 4487 /** 4488 * e1000e_update_phy_stats - Update the PHY statistics counters 4489 * @adapter: board private structure 4490 * 4491 * Read/clear the upper 16-bit PHY registers and read/accumulate lower 4492 **/ 4493 static void e1000e_update_phy_stats(struct e1000_adapter *adapter) 4494 { 4495 struct e1000_hw *hw = &adapter->hw; 4496 s32 ret_val; 4497 u16 phy_data; 4498 4499 ret_val = hw->phy.ops.acquire(hw); 4500 if (ret_val) 4501 return; 4502 4503 /* A page set is expensive so check if already on desired page. 4504 * If not, set to the page with the PHY status registers. 4505 */ 4506 hw->phy.addr = 1; 4507 ret_val = e1000e_read_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, 4508 &phy_data); 4509 if (ret_val) 4510 goto release; 4511 if (phy_data != (HV_STATS_PAGE << IGP_PAGE_SHIFT)) { 4512 ret_val = hw->phy.ops.set_page(hw, 4513 HV_STATS_PAGE << IGP_PAGE_SHIFT); 4514 if (ret_val) 4515 goto release; 4516 } 4517 4518 /* Single Collision Count */ 4519 hw->phy.ops.read_reg_page(hw, HV_SCC_UPPER, &phy_data); 4520 ret_val = hw->phy.ops.read_reg_page(hw, HV_SCC_LOWER, &phy_data); 4521 if (!ret_val) 4522 adapter->stats.scc += phy_data; 4523 4524 /* Excessive Collision Count */ 4525 hw->phy.ops.read_reg_page(hw, HV_ECOL_UPPER, &phy_data); 4526 ret_val = hw->phy.ops.read_reg_page(hw, HV_ECOL_LOWER, &phy_data); 4527 if (!ret_val) 4528 adapter->stats.ecol += phy_data; 4529 4530 /* Multiple Collision Count */ 4531 hw->phy.ops.read_reg_page(hw, HV_MCC_UPPER, &phy_data); 4532 ret_val = hw->phy.ops.read_reg_page(hw, HV_MCC_LOWER, &phy_data); 4533 if (!ret_val) 4534 adapter->stats.mcc += phy_data; 4535 4536 /* Late Collision Count */ 4537 hw->phy.ops.read_reg_page(hw, HV_LATECOL_UPPER, &phy_data); 4538 ret_val = hw->phy.ops.read_reg_page(hw, HV_LATECOL_LOWER, &phy_data); 4539 if (!ret_val) 4540 adapter->stats.latecol += phy_data; 4541 4542 /* Collision Count - also used for adaptive IFS */ 4543 hw->phy.ops.read_reg_page(hw, HV_COLC_UPPER, &phy_data); 4544 ret_val = hw->phy.ops.read_reg_page(hw, HV_COLC_LOWER, &phy_data); 4545 if (!ret_val) 4546 hw->mac.collision_delta = phy_data; 4547 4548 /* Defer Count */ 4549 hw->phy.ops.read_reg_page(hw, HV_DC_UPPER, &phy_data); 4550 ret_val = hw->phy.ops.read_reg_page(hw, HV_DC_LOWER, &phy_data); 4551 if (!ret_val) 4552 adapter->stats.dc += phy_data; 4553 4554 /* Transmit with no CRS */ 4555 hw->phy.ops.read_reg_page(hw, HV_TNCRS_UPPER, &phy_data); 4556 ret_val = hw->phy.ops.read_reg_page(hw, HV_TNCRS_LOWER, &phy_data); 4557 if (!ret_val) 4558 adapter->stats.tncrs += phy_data; 4559 4560 release: 4561 hw->phy.ops.release(hw); 4562 } 4563 4564 /** 4565 * e1000e_update_stats - Update the board statistics counters 4566 * @adapter: board private structure 4567 **/ 4568 static void e1000e_update_stats(struct e1000_adapter *adapter) 4569 { 4570 struct net_device *netdev = adapter->netdev; 4571 struct e1000_hw *hw = &adapter->hw; 4572 struct pci_dev *pdev = adapter->pdev; 4573 4574 /* Prevent stats update while adapter is being reset, or if the pci 4575 * connection is down. 4576 */ 4577 if (adapter->link_speed == 0) 4578 return; 4579 if (pci_channel_offline(pdev)) 4580 return; 4581 4582 adapter->stats.crcerrs += er32(CRCERRS); 4583 adapter->stats.gprc += er32(GPRC); 4584 adapter->stats.gorc += er32(GORCL); 4585 er32(GORCH); /* Clear gorc */ 4586 adapter->stats.bprc += er32(BPRC); 4587 adapter->stats.mprc += er32(MPRC); 4588 adapter->stats.roc += er32(ROC); 4589 4590 adapter->stats.mpc += er32(MPC); 4591 4592 /* Half-duplex statistics */ 4593 if (adapter->link_duplex == HALF_DUPLEX) { 4594 if (adapter->flags2 & FLAG2_HAS_PHY_STATS) { 4595 e1000e_update_phy_stats(adapter); 4596 } else { 4597 adapter->stats.scc += er32(SCC); 4598 adapter->stats.ecol += er32(ECOL); 4599 adapter->stats.mcc += er32(MCC); 4600 adapter->stats.latecol += er32(LATECOL); 4601 adapter->stats.dc += er32(DC); 4602 4603 hw->mac.collision_delta = er32(COLC); 4604 4605 if ((hw->mac.type != e1000_82574) && 4606 (hw->mac.type != e1000_82583)) 4607 adapter->stats.tncrs += er32(TNCRS); 4608 } 4609 adapter->stats.colc += hw->mac.collision_delta; 4610 } 4611 4612 adapter->stats.xonrxc += er32(XONRXC); 4613 adapter->stats.xontxc += er32(XONTXC); 4614 adapter->stats.xoffrxc += er32(XOFFRXC); 4615 adapter->stats.xofftxc += er32(XOFFTXC); 4616 adapter->stats.gptc += er32(GPTC); 4617 adapter->stats.gotc += er32(GOTCL); 4618 er32(GOTCH); /* Clear gotc */ 4619 adapter->stats.rnbc += er32(RNBC); 4620 adapter->stats.ruc += er32(RUC); 4621 4622 adapter->stats.mptc += er32(MPTC); 4623 adapter->stats.bptc += er32(BPTC); 4624 4625 /* used for adaptive IFS */ 4626 4627 hw->mac.tx_packet_delta = er32(TPT); 4628 adapter->stats.tpt += hw->mac.tx_packet_delta; 4629 4630 adapter->stats.algnerrc += er32(ALGNERRC); 4631 adapter->stats.rxerrc += er32(RXERRC); 4632 adapter->stats.cexterr += er32(CEXTERR); 4633 adapter->stats.tsctc += er32(TSCTC); 4634 adapter->stats.tsctfc += er32(TSCTFC); 4635 4636 /* Fill out the OS statistics structure */ 4637 netdev->stats.multicast = adapter->stats.mprc; 4638 netdev->stats.collisions = adapter->stats.colc; 4639 4640 /* Rx Errors */ 4641 4642 /* RLEC on some newer hardware can be incorrect so build 4643 * our own version based on RUC and ROC 4644 */ 4645 netdev->stats.rx_errors = adapter->stats.rxerrc + 4646 adapter->stats.crcerrs + adapter->stats.algnerrc + 4647 adapter->stats.ruc + adapter->stats.roc + adapter->stats.cexterr; 4648 netdev->stats.rx_length_errors = adapter->stats.ruc + 4649 adapter->stats.roc; 4650 netdev->stats.rx_crc_errors = adapter->stats.crcerrs; 4651 netdev->stats.rx_frame_errors = adapter->stats.algnerrc; 4652 netdev->stats.rx_missed_errors = adapter->stats.mpc; 4653 4654 /* Tx Errors */ 4655 netdev->stats.tx_errors = adapter->stats.ecol + adapter->stats.latecol; 4656 netdev->stats.tx_aborted_errors = adapter->stats.ecol; 4657 netdev->stats.tx_window_errors = adapter->stats.latecol; 4658 netdev->stats.tx_carrier_errors = adapter->stats.tncrs; 4659 4660 /* Tx Dropped needs to be maintained elsewhere */ 4661 4662 /* Management Stats */ 4663 adapter->stats.mgptc += er32(MGTPTC); 4664 adapter->stats.mgprc += er32(MGTPRC); 4665 adapter->stats.mgpdc += er32(MGTPDC); 4666 4667 /* Correctable ECC Errors */ 4668 if (hw->mac.type == e1000_pch_lpt) { 4669 u32 pbeccsts = er32(PBECCSTS); 4670 adapter->corr_errors += 4671 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK; 4672 adapter->uncorr_errors += 4673 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >> 4674 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT; 4675 } 4676 } 4677 4678 /** 4679 * e1000_phy_read_status - Update the PHY register status snapshot 4680 * @adapter: board private structure 4681 **/ 4682 static void e1000_phy_read_status(struct e1000_adapter *adapter) 4683 { 4684 struct e1000_hw *hw = &adapter->hw; 4685 struct e1000_phy_regs *phy = &adapter->phy_regs; 4686 4687 if (!pm_runtime_suspended((&adapter->pdev->dev)->parent) && 4688 (er32(STATUS) & E1000_STATUS_LU) && 4689 (adapter->hw.phy.media_type == e1000_media_type_copper)) { 4690 int ret_val; 4691 4692 ret_val = e1e_rphy(hw, MII_BMCR, &phy->bmcr); 4693 ret_val |= e1e_rphy(hw, MII_BMSR, &phy->bmsr); 4694 ret_val |= e1e_rphy(hw, MII_ADVERTISE, &phy->advertise); 4695 ret_val |= e1e_rphy(hw, MII_LPA, &phy->lpa); 4696 ret_val |= e1e_rphy(hw, MII_EXPANSION, &phy->expansion); 4697 ret_val |= e1e_rphy(hw, MII_CTRL1000, &phy->ctrl1000); 4698 ret_val |= e1e_rphy(hw, MII_STAT1000, &phy->stat1000); 4699 ret_val |= e1e_rphy(hw, MII_ESTATUS, &phy->estatus); 4700 if (ret_val) 4701 e_warn("Error reading PHY register\n"); 4702 } else { 4703 /* Do not read PHY registers if link is not up 4704 * Set values to typical power-on defaults 4705 */ 4706 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX); 4707 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL | 4708 BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE | 4709 BMSR_ERCAP); 4710 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP | 4711 ADVERTISE_ALL | ADVERTISE_CSMA); 4712 phy->lpa = 0; 4713 phy->expansion = EXPANSION_ENABLENPAGE; 4714 phy->ctrl1000 = ADVERTISE_1000FULL; 4715 phy->stat1000 = 0; 4716 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF); 4717 } 4718 } 4719 4720 static void e1000_print_link_info(struct e1000_adapter *adapter) 4721 { 4722 struct e1000_hw *hw = &adapter->hw; 4723 u32 ctrl = er32(CTRL); 4724 4725 /* Link status message must follow this format for user tools */ 4726 pr_info("%s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n", 4727 adapter->netdev->name, adapter->link_speed, 4728 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half", 4729 (ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE) ? "Rx/Tx" : 4730 (ctrl & E1000_CTRL_RFCE) ? "Rx" : 4731 (ctrl & E1000_CTRL_TFCE) ? "Tx" : "None"); 4732 } 4733 4734 static bool e1000e_has_link(struct e1000_adapter *adapter) 4735 { 4736 struct e1000_hw *hw = &adapter->hw; 4737 bool link_active = false; 4738 s32 ret_val = 0; 4739 4740 /* get_link_status is set on LSC (link status) interrupt or 4741 * Rx sequence error interrupt. get_link_status will stay 4742 * false until the check_for_link establishes link 4743 * for copper adapters ONLY 4744 */ 4745 switch (hw->phy.media_type) { 4746 case e1000_media_type_copper: 4747 if (hw->mac.get_link_status) { 4748 ret_val = hw->mac.ops.check_for_link(hw); 4749 link_active = !hw->mac.get_link_status; 4750 } else { 4751 link_active = true; 4752 } 4753 break; 4754 case e1000_media_type_fiber: 4755 ret_val = hw->mac.ops.check_for_link(hw); 4756 link_active = !!(er32(STATUS) & E1000_STATUS_LU); 4757 break; 4758 case e1000_media_type_internal_serdes: 4759 ret_val = hw->mac.ops.check_for_link(hw); 4760 link_active = adapter->hw.mac.serdes_has_link; 4761 break; 4762 default: 4763 case e1000_media_type_unknown: 4764 break; 4765 } 4766 4767 if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) && 4768 (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) { 4769 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */ 4770 e_info("Gigabit has been disabled, downgrading speed\n"); 4771 } 4772 4773 return link_active; 4774 } 4775 4776 static void e1000e_enable_receives(struct e1000_adapter *adapter) 4777 { 4778 /* make sure the receive unit is started */ 4779 if ((adapter->flags & FLAG_RX_NEEDS_RESTART) && 4780 (adapter->flags & FLAG_RESTART_NOW)) { 4781 struct e1000_hw *hw = &adapter->hw; 4782 u32 rctl = er32(RCTL); 4783 ew32(RCTL, rctl | E1000_RCTL_EN); 4784 adapter->flags &= ~FLAG_RESTART_NOW; 4785 } 4786 } 4787 4788 static void e1000e_check_82574_phy_workaround(struct e1000_adapter *adapter) 4789 { 4790 struct e1000_hw *hw = &adapter->hw; 4791 4792 /* With 82574 controllers, PHY needs to be checked periodically 4793 * for hung state and reset, if two calls return true 4794 */ 4795 if (e1000_check_phy_82574(hw)) 4796 adapter->phy_hang_count++; 4797 else 4798 adapter->phy_hang_count = 0; 4799 4800 if (adapter->phy_hang_count > 1) { 4801 adapter->phy_hang_count = 0; 4802 schedule_work(&adapter->reset_task); 4803 } 4804 } 4805 4806 /** 4807 * e1000_watchdog - Timer Call-back 4808 * @data: pointer to adapter cast into an unsigned long 4809 **/ 4810 static void e1000_watchdog(unsigned long data) 4811 { 4812 struct e1000_adapter *adapter = (struct e1000_adapter *)data; 4813 4814 /* Do the rest outside of interrupt context */ 4815 schedule_work(&adapter->watchdog_task); 4816 4817 /* TODO: make this use queue_delayed_work() */ 4818 } 4819 4820 static void e1000_watchdog_task(struct work_struct *work) 4821 { 4822 struct e1000_adapter *adapter = container_of(work, 4823 struct e1000_adapter, 4824 watchdog_task); 4825 struct net_device *netdev = adapter->netdev; 4826 struct e1000_mac_info *mac = &adapter->hw.mac; 4827 struct e1000_phy_info *phy = &adapter->hw.phy; 4828 struct e1000_ring *tx_ring = adapter->tx_ring; 4829 struct e1000_hw *hw = &adapter->hw; 4830 u32 link, tctl; 4831 4832 if (test_bit(__E1000_DOWN, &adapter->state)) 4833 return; 4834 4835 link = e1000e_has_link(adapter); 4836 if ((netif_carrier_ok(netdev)) && link) { 4837 /* Cancel scheduled suspend requests. */ 4838 pm_runtime_resume(netdev->dev.parent); 4839 4840 e1000e_enable_receives(adapter); 4841 goto link_up; 4842 } 4843 4844 if ((e1000e_enable_tx_pkt_filtering(hw)) && 4845 (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)) 4846 e1000_update_mng_vlan(adapter); 4847 4848 if (link) { 4849 if (!netif_carrier_ok(netdev)) { 4850 bool txb2b = true; 4851 4852 /* Cancel scheduled suspend requests. */ 4853 pm_runtime_resume(netdev->dev.parent); 4854 4855 /* update snapshot of PHY registers on LSC */ 4856 e1000_phy_read_status(adapter); 4857 mac->ops.get_link_up_info(&adapter->hw, 4858 &adapter->link_speed, 4859 &adapter->link_duplex); 4860 e1000_print_link_info(adapter); 4861 4862 /* check if SmartSpeed worked */ 4863 e1000e_check_downshift(hw); 4864 if (phy->speed_downgraded) 4865 netdev_warn(netdev, 4866 "Link Speed was downgraded by SmartSpeed\n"); 4867 4868 /* On supported PHYs, check for duplex mismatch only 4869 * if link has autonegotiated at 10/100 half 4870 */ 4871 if ((hw->phy.type == e1000_phy_igp_3 || 4872 hw->phy.type == e1000_phy_bm) && 4873 hw->mac.autoneg && 4874 (adapter->link_speed == SPEED_10 || 4875 adapter->link_speed == SPEED_100) && 4876 (adapter->link_duplex == HALF_DUPLEX)) { 4877 u16 autoneg_exp; 4878 4879 e1e_rphy(hw, MII_EXPANSION, &autoneg_exp); 4880 4881 if (!(autoneg_exp & EXPANSION_NWAY)) 4882 e_info("Autonegotiated half duplex but link partner cannot autoneg. Try forcing full duplex if link gets many collisions.\n"); 4883 } 4884 4885 /* adjust timeout factor according to speed/duplex */ 4886 adapter->tx_timeout_factor = 1; 4887 switch (adapter->link_speed) { 4888 case SPEED_10: 4889 txb2b = false; 4890 adapter->tx_timeout_factor = 16; 4891 break; 4892 case SPEED_100: 4893 txb2b = false; 4894 adapter->tx_timeout_factor = 10; 4895 break; 4896 } 4897 4898 /* workaround: re-program speed mode bit after 4899 * link-up event 4900 */ 4901 if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) && 4902 !txb2b) { 4903 u32 tarc0; 4904 tarc0 = er32(TARC(0)); 4905 tarc0 &= ~SPEED_MODE_BIT; 4906 ew32(TARC(0), tarc0); 4907 } 4908 4909 /* disable TSO for pcie and 10/100 speeds, to avoid 4910 * some hardware issues 4911 */ 4912 if (!(adapter->flags & FLAG_TSO_FORCE)) { 4913 switch (adapter->link_speed) { 4914 case SPEED_10: 4915 case SPEED_100: 4916 e_info("10/100 speed: disabling TSO\n"); 4917 netdev->features &= ~NETIF_F_TSO; 4918 netdev->features &= ~NETIF_F_TSO6; 4919 break; 4920 case SPEED_1000: 4921 netdev->features |= NETIF_F_TSO; 4922 netdev->features |= NETIF_F_TSO6; 4923 break; 4924 default: 4925 /* oops */ 4926 break; 4927 } 4928 } 4929 4930 /* enable transmits in the hardware, need to do this 4931 * after setting TARC(0) 4932 */ 4933 tctl = er32(TCTL); 4934 tctl |= E1000_TCTL_EN; 4935 ew32(TCTL, tctl); 4936 4937 /* Perform any post-link-up configuration before 4938 * reporting link up. 4939 */ 4940 if (phy->ops.cfg_on_link_up) 4941 phy->ops.cfg_on_link_up(hw); 4942 4943 netif_carrier_on(netdev); 4944 4945 if (!test_bit(__E1000_DOWN, &adapter->state)) 4946 mod_timer(&adapter->phy_info_timer, 4947 round_jiffies(jiffies + 2 * HZ)); 4948 } 4949 } else { 4950 if (netif_carrier_ok(netdev)) { 4951 adapter->link_speed = 0; 4952 adapter->link_duplex = 0; 4953 /* Link status message must follow this format */ 4954 pr_info("%s NIC Link is Down\n", adapter->netdev->name); 4955 netif_carrier_off(netdev); 4956 if (!test_bit(__E1000_DOWN, &adapter->state)) 4957 mod_timer(&adapter->phy_info_timer, 4958 round_jiffies(jiffies + 2 * HZ)); 4959 4960 /* The link is lost so the controller stops DMA. 4961 * If there is queued Tx work that cannot be done 4962 * or if on an 8000ES2LAN which requires a Rx packet 4963 * buffer work-around on link down event, reset the 4964 * controller to flush the Tx/Rx packet buffers. 4965 * (Do the reset outside of interrupt context). 4966 */ 4967 if ((adapter->flags & FLAG_RX_NEEDS_RESTART) || 4968 (e1000_desc_unused(tx_ring) + 1 < tx_ring->count)) 4969 adapter->flags |= FLAG_RESTART_NOW; 4970 else 4971 pm_schedule_suspend(netdev->dev.parent, 4972 LINK_TIMEOUT); 4973 } 4974 } 4975 4976 link_up: 4977 spin_lock(&adapter->stats64_lock); 4978 e1000e_update_stats(adapter); 4979 4980 mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old; 4981 adapter->tpt_old = adapter->stats.tpt; 4982 mac->collision_delta = adapter->stats.colc - adapter->colc_old; 4983 adapter->colc_old = adapter->stats.colc; 4984 4985 adapter->gorc = adapter->stats.gorc - adapter->gorc_old; 4986 adapter->gorc_old = adapter->stats.gorc; 4987 adapter->gotc = adapter->stats.gotc - adapter->gotc_old; 4988 adapter->gotc_old = adapter->stats.gotc; 4989 spin_unlock(&adapter->stats64_lock); 4990 4991 if (adapter->flags & FLAG_RESTART_NOW) { 4992 schedule_work(&adapter->reset_task); 4993 /* return immediately since reset is imminent */ 4994 return; 4995 } 4996 4997 e1000e_update_adaptive(&adapter->hw); 4998 4999 /* Simple mode for Interrupt Throttle Rate (ITR) */ 5000 if (adapter->itr_setting == 4) { 5001 /* Symmetric Tx/Rx gets a reduced ITR=2000; 5002 * Total asymmetrical Tx or Rx gets ITR=8000; 5003 * everyone else is between 2000-8000. 5004 */ 5005 u32 goc = (adapter->gotc + adapter->gorc) / 10000; 5006 u32 dif = (adapter->gotc > adapter->gorc ? 5007 adapter->gotc - adapter->gorc : 5008 adapter->gorc - adapter->gotc) / 10000; 5009 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000; 5010 5011 e1000e_write_itr(adapter, itr); 5012 } 5013 5014 /* Cause software interrupt to ensure Rx ring is cleaned */ 5015 if (adapter->msix_entries) 5016 ew32(ICS, adapter->rx_ring->ims_val); 5017 else 5018 ew32(ICS, E1000_ICS_RXDMT0); 5019 5020 /* flush pending descriptors to memory before detecting Tx hang */ 5021 e1000e_flush_descriptors(adapter); 5022 5023 /* Force detection of hung controller every watchdog period */ 5024 adapter->detect_tx_hung = true; 5025 5026 /* With 82571 controllers, LAA may be overwritten due to controller 5027 * reset from the other port. Set the appropriate LAA in RAR[0] 5028 */ 5029 if (e1000e_get_laa_state_82571(hw)) 5030 hw->mac.ops.rar_set(hw, adapter->hw.mac.addr, 0); 5031 5032 if (adapter->flags2 & FLAG2_CHECK_PHY_HANG) 5033 e1000e_check_82574_phy_workaround(adapter); 5034 5035 /* Clear valid timestamp stuck in RXSTMPL/H due to a Rx error */ 5036 if (adapter->hwtstamp_config.rx_filter != HWTSTAMP_FILTER_NONE) { 5037 if ((adapter->flags2 & FLAG2_CHECK_RX_HWTSTAMP) && 5038 (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID)) { 5039 er32(RXSTMPH); 5040 adapter->rx_hwtstamp_cleared++; 5041 } else { 5042 adapter->flags2 |= FLAG2_CHECK_RX_HWTSTAMP; 5043 } 5044 } 5045 5046 /* Reset the timer */ 5047 if (!test_bit(__E1000_DOWN, &adapter->state)) 5048 mod_timer(&adapter->watchdog_timer, 5049 round_jiffies(jiffies + 2 * HZ)); 5050 } 5051 5052 #define E1000_TX_FLAGS_CSUM 0x00000001 5053 #define E1000_TX_FLAGS_VLAN 0x00000002 5054 #define E1000_TX_FLAGS_TSO 0x00000004 5055 #define E1000_TX_FLAGS_IPV4 0x00000008 5056 #define E1000_TX_FLAGS_NO_FCS 0x00000010 5057 #define E1000_TX_FLAGS_HWTSTAMP 0x00000020 5058 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000 5059 #define E1000_TX_FLAGS_VLAN_SHIFT 16 5060 5061 static int e1000_tso(struct e1000_ring *tx_ring, struct sk_buff *skb) 5062 { 5063 struct e1000_context_desc *context_desc; 5064 struct e1000_buffer *buffer_info; 5065 unsigned int i; 5066 u32 cmd_length = 0; 5067 u16 ipcse = 0, mss; 5068 u8 ipcss, ipcso, tucss, tucso, hdr_len; 5069 5070 if (!skb_is_gso(skb)) 5071 return 0; 5072 5073 if (skb_header_cloned(skb)) { 5074 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); 5075 5076 if (err) 5077 return err; 5078 } 5079 5080 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 5081 mss = skb_shinfo(skb)->gso_size; 5082 if (skb->protocol == htons(ETH_P_IP)) { 5083 struct iphdr *iph = ip_hdr(skb); 5084 iph->tot_len = 0; 5085 iph->check = 0; 5086 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 5087 0, IPPROTO_TCP, 0); 5088 cmd_length = E1000_TXD_CMD_IP; 5089 ipcse = skb_transport_offset(skb) - 1; 5090 } else if (skb_is_gso_v6(skb)) { 5091 ipv6_hdr(skb)->payload_len = 0; 5092 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 5093 &ipv6_hdr(skb)->daddr, 5094 0, IPPROTO_TCP, 0); 5095 ipcse = 0; 5096 } 5097 ipcss = skb_network_offset(skb); 5098 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data; 5099 tucss = skb_transport_offset(skb); 5100 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; 5101 5102 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE | 5103 E1000_TXD_CMD_TCP | (skb->len - (hdr_len))); 5104 5105 i = tx_ring->next_to_use; 5106 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); 5107 buffer_info = &tx_ring->buffer_info[i]; 5108 5109 context_desc->lower_setup.ip_fields.ipcss = ipcss; 5110 context_desc->lower_setup.ip_fields.ipcso = ipcso; 5111 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse); 5112 context_desc->upper_setup.tcp_fields.tucss = tucss; 5113 context_desc->upper_setup.tcp_fields.tucso = tucso; 5114 context_desc->upper_setup.tcp_fields.tucse = 0; 5115 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss); 5116 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len; 5117 context_desc->cmd_and_length = cpu_to_le32(cmd_length); 5118 5119 buffer_info->time_stamp = jiffies; 5120 buffer_info->next_to_watch = i; 5121 5122 i++; 5123 if (i == tx_ring->count) 5124 i = 0; 5125 tx_ring->next_to_use = i; 5126 5127 return 1; 5128 } 5129 5130 static bool e1000_tx_csum(struct e1000_ring *tx_ring, struct sk_buff *skb) 5131 { 5132 struct e1000_adapter *adapter = tx_ring->adapter; 5133 struct e1000_context_desc *context_desc; 5134 struct e1000_buffer *buffer_info; 5135 unsigned int i; 5136 u8 css; 5137 u32 cmd_len = E1000_TXD_CMD_DEXT; 5138 __be16 protocol; 5139 5140 if (skb->ip_summed != CHECKSUM_PARTIAL) 5141 return 0; 5142 5143 if (skb->protocol == cpu_to_be16(ETH_P_8021Q)) 5144 protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto; 5145 else 5146 protocol = skb->protocol; 5147 5148 switch (protocol) { 5149 case cpu_to_be16(ETH_P_IP): 5150 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 5151 cmd_len |= E1000_TXD_CMD_TCP; 5152 break; 5153 case cpu_to_be16(ETH_P_IPV6): 5154 /* XXX not handling all IPV6 headers */ 5155 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 5156 cmd_len |= E1000_TXD_CMD_TCP; 5157 break; 5158 default: 5159 if (unlikely(net_ratelimit())) 5160 e_warn("checksum_partial proto=%x!\n", 5161 be16_to_cpu(protocol)); 5162 break; 5163 } 5164 5165 css = skb_checksum_start_offset(skb); 5166 5167 i = tx_ring->next_to_use; 5168 buffer_info = &tx_ring->buffer_info[i]; 5169 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); 5170 5171 context_desc->lower_setup.ip_config = 0; 5172 context_desc->upper_setup.tcp_fields.tucss = css; 5173 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum_offset; 5174 context_desc->upper_setup.tcp_fields.tucse = 0; 5175 context_desc->tcp_seg_setup.data = 0; 5176 context_desc->cmd_and_length = cpu_to_le32(cmd_len); 5177 5178 buffer_info->time_stamp = jiffies; 5179 buffer_info->next_to_watch = i; 5180 5181 i++; 5182 if (i == tx_ring->count) 5183 i = 0; 5184 tx_ring->next_to_use = i; 5185 5186 return 1; 5187 } 5188 5189 static int e1000_tx_map(struct e1000_ring *tx_ring, struct sk_buff *skb, 5190 unsigned int first, unsigned int max_per_txd, 5191 unsigned int nr_frags) 5192 { 5193 struct e1000_adapter *adapter = tx_ring->adapter; 5194 struct pci_dev *pdev = adapter->pdev; 5195 struct e1000_buffer *buffer_info; 5196 unsigned int len = skb_headlen(skb); 5197 unsigned int offset = 0, size, count = 0, i; 5198 unsigned int f, bytecount, segs; 5199 5200 i = tx_ring->next_to_use; 5201 5202 while (len) { 5203 buffer_info = &tx_ring->buffer_info[i]; 5204 size = min(len, max_per_txd); 5205 5206 buffer_info->length = size; 5207 buffer_info->time_stamp = jiffies; 5208 buffer_info->next_to_watch = i; 5209 buffer_info->dma = dma_map_single(&pdev->dev, 5210 skb->data + offset, 5211 size, DMA_TO_DEVICE); 5212 buffer_info->mapped_as_page = false; 5213 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 5214 goto dma_error; 5215 5216 len -= size; 5217 offset += size; 5218 count++; 5219 5220 if (len) { 5221 i++; 5222 if (i == tx_ring->count) 5223 i = 0; 5224 } 5225 } 5226 5227 for (f = 0; f < nr_frags; f++) { 5228 const struct skb_frag_struct *frag; 5229 5230 frag = &skb_shinfo(skb)->frags[f]; 5231 len = skb_frag_size(frag); 5232 offset = 0; 5233 5234 while (len) { 5235 i++; 5236 if (i == tx_ring->count) 5237 i = 0; 5238 5239 buffer_info = &tx_ring->buffer_info[i]; 5240 size = min(len, max_per_txd); 5241 5242 buffer_info->length = size; 5243 buffer_info->time_stamp = jiffies; 5244 buffer_info->next_to_watch = i; 5245 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 5246 offset, size, 5247 DMA_TO_DEVICE); 5248 buffer_info->mapped_as_page = true; 5249 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 5250 goto dma_error; 5251 5252 len -= size; 5253 offset += size; 5254 count++; 5255 } 5256 } 5257 5258 segs = skb_shinfo(skb)->gso_segs ? : 1; 5259 /* multiply data chunks by size of headers */ 5260 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len; 5261 5262 tx_ring->buffer_info[i].skb = skb; 5263 tx_ring->buffer_info[i].segs = segs; 5264 tx_ring->buffer_info[i].bytecount = bytecount; 5265 tx_ring->buffer_info[first].next_to_watch = i; 5266 5267 return count; 5268 5269 dma_error: 5270 dev_err(&pdev->dev, "Tx DMA map failed\n"); 5271 buffer_info->dma = 0; 5272 if (count) 5273 count--; 5274 5275 while (count--) { 5276 if (i == 0) 5277 i += tx_ring->count; 5278 i--; 5279 buffer_info = &tx_ring->buffer_info[i]; 5280 e1000_put_txbuf(tx_ring, buffer_info); 5281 } 5282 5283 return 0; 5284 } 5285 5286 static void e1000_tx_queue(struct e1000_ring *tx_ring, int tx_flags, int count) 5287 { 5288 struct e1000_adapter *adapter = tx_ring->adapter; 5289 struct e1000_tx_desc *tx_desc = NULL; 5290 struct e1000_buffer *buffer_info; 5291 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS; 5292 unsigned int i; 5293 5294 if (tx_flags & E1000_TX_FLAGS_TSO) { 5295 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D | 5296 E1000_TXD_CMD_TSE; 5297 txd_upper |= E1000_TXD_POPTS_TXSM << 8; 5298 5299 if (tx_flags & E1000_TX_FLAGS_IPV4) 5300 txd_upper |= E1000_TXD_POPTS_IXSM << 8; 5301 } 5302 5303 if (tx_flags & E1000_TX_FLAGS_CSUM) { 5304 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; 5305 txd_upper |= E1000_TXD_POPTS_TXSM << 8; 5306 } 5307 5308 if (tx_flags & E1000_TX_FLAGS_VLAN) { 5309 txd_lower |= E1000_TXD_CMD_VLE; 5310 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK); 5311 } 5312 5313 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) 5314 txd_lower &= ~(E1000_TXD_CMD_IFCS); 5315 5316 if (unlikely(tx_flags & E1000_TX_FLAGS_HWTSTAMP)) { 5317 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; 5318 txd_upper |= E1000_TXD_EXTCMD_TSTAMP; 5319 } 5320 5321 i = tx_ring->next_to_use; 5322 5323 do { 5324 buffer_info = &tx_ring->buffer_info[i]; 5325 tx_desc = E1000_TX_DESC(*tx_ring, i); 5326 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 5327 tx_desc->lower.data = cpu_to_le32(txd_lower | 5328 buffer_info->length); 5329 tx_desc->upper.data = cpu_to_le32(txd_upper); 5330 5331 i++; 5332 if (i == tx_ring->count) 5333 i = 0; 5334 } while (--count > 0); 5335 5336 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd); 5337 5338 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */ 5339 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) 5340 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS)); 5341 5342 /* Force memory writes to complete before letting h/w 5343 * know there are new descriptors to fetch. (Only 5344 * applicable for weak-ordered memory model archs, 5345 * such as IA-64). 5346 */ 5347 wmb(); 5348 5349 tx_ring->next_to_use = i; 5350 5351 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 5352 e1000e_update_tdt_wa(tx_ring, i); 5353 else 5354 writel(i, tx_ring->tail); 5355 5356 /* we need this if more than one processor can write to our tail 5357 * at a time, it synchronizes IO on IA64/Altix systems 5358 */ 5359 mmiowb(); 5360 } 5361 5362 #define MINIMUM_DHCP_PACKET_SIZE 282 5363 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter, 5364 struct sk_buff *skb) 5365 { 5366 struct e1000_hw *hw = &adapter->hw; 5367 u16 length, offset; 5368 5369 if (vlan_tx_tag_present(skb) && 5370 !((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) && 5371 (adapter->hw.mng_cookie.status & 5372 E1000_MNG_DHCP_COOKIE_STATUS_VLAN))) 5373 return 0; 5374 5375 if (skb->len <= MINIMUM_DHCP_PACKET_SIZE) 5376 return 0; 5377 5378 if (((struct ethhdr *)skb->data)->h_proto != htons(ETH_P_IP)) 5379 return 0; 5380 5381 { 5382 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data + 14); 5383 struct udphdr *udp; 5384 5385 if (ip->protocol != IPPROTO_UDP) 5386 return 0; 5387 5388 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2)); 5389 if (ntohs(udp->dest) != 67) 5390 return 0; 5391 5392 offset = (u8 *)udp + 8 - skb->data; 5393 length = skb->len - offset; 5394 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length); 5395 } 5396 5397 return 0; 5398 } 5399 5400 static int __e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size) 5401 { 5402 struct e1000_adapter *adapter = tx_ring->adapter; 5403 5404 netif_stop_queue(adapter->netdev); 5405 /* Herbert's original patch had: 5406 * smp_mb__after_netif_stop_queue(); 5407 * but since that doesn't exist yet, just open code it. 5408 */ 5409 smp_mb(); 5410 5411 /* We need to check again in a case another CPU has just 5412 * made room available. 5413 */ 5414 if (e1000_desc_unused(tx_ring) < size) 5415 return -EBUSY; 5416 5417 /* A reprieve! */ 5418 netif_start_queue(adapter->netdev); 5419 ++adapter->restart_queue; 5420 return 0; 5421 } 5422 5423 static int e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size) 5424 { 5425 BUG_ON(size > tx_ring->count); 5426 5427 if (e1000_desc_unused(tx_ring) >= size) 5428 return 0; 5429 return __e1000_maybe_stop_tx(tx_ring, size); 5430 } 5431 5432 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, 5433 struct net_device *netdev) 5434 { 5435 struct e1000_adapter *adapter = netdev_priv(netdev); 5436 struct e1000_ring *tx_ring = adapter->tx_ring; 5437 unsigned int first; 5438 unsigned int tx_flags = 0; 5439 unsigned int len = skb_headlen(skb); 5440 unsigned int nr_frags; 5441 unsigned int mss; 5442 int count = 0; 5443 int tso; 5444 unsigned int f; 5445 5446 if (test_bit(__E1000_DOWN, &adapter->state)) { 5447 dev_kfree_skb_any(skb); 5448 return NETDEV_TX_OK; 5449 } 5450 5451 if (skb->len <= 0) { 5452 dev_kfree_skb_any(skb); 5453 return NETDEV_TX_OK; 5454 } 5455 5456 /* The minimum packet size with TCTL.PSP set is 17 bytes so 5457 * pad skb in order to meet this minimum size requirement 5458 */ 5459 if (unlikely(skb->len < 17)) { 5460 if (skb_pad(skb, 17 - skb->len)) 5461 return NETDEV_TX_OK; 5462 skb->len = 17; 5463 skb_set_tail_pointer(skb, 17); 5464 } 5465 5466 mss = skb_shinfo(skb)->gso_size; 5467 if (mss) { 5468 u8 hdr_len; 5469 5470 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data 5471 * points to just header, pull a few bytes of payload from 5472 * frags into skb->data 5473 */ 5474 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 5475 /* we do this workaround for ES2LAN, but it is un-necessary, 5476 * avoiding it could save a lot of cycles 5477 */ 5478 if (skb->data_len && (hdr_len == len)) { 5479 unsigned int pull_size; 5480 5481 pull_size = min_t(unsigned int, 4, skb->data_len); 5482 if (!__pskb_pull_tail(skb, pull_size)) { 5483 e_err("__pskb_pull_tail failed.\n"); 5484 dev_kfree_skb_any(skb); 5485 return NETDEV_TX_OK; 5486 } 5487 len = skb_headlen(skb); 5488 } 5489 } 5490 5491 /* reserve a descriptor for the offload context */ 5492 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL)) 5493 count++; 5494 count++; 5495 5496 count += DIV_ROUND_UP(len, adapter->tx_fifo_limit); 5497 5498 nr_frags = skb_shinfo(skb)->nr_frags; 5499 for (f = 0; f < nr_frags; f++) 5500 count += DIV_ROUND_UP(skb_frag_size(&skb_shinfo(skb)->frags[f]), 5501 adapter->tx_fifo_limit); 5502 5503 if (adapter->hw.mac.tx_pkt_filtering) 5504 e1000_transfer_dhcp_info(adapter, skb); 5505 5506 /* need: count + 2 desc gap to keep tail from touching 5507 * head, otherwise try next time 5508 */ 5509 if (e1000_maybe_stop_tx(tx_ring, count + 2)) 5510 return NETDEV_TX_BUSY; 5511 5512 if (vlan_tx_tag_present(skb)) { 5513 tx_flags |= E1000_TX_FLAGS_VLAN; 5514 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT); 5515 } 5516 5517 first = tx_ring->next_to_use; 5518 5519 tso = e1000_tso(tx_ring, skb); 5520 if (tso < 0) { 5521 dev_kfree_skb_any(skb); 5522 return NETDEV_TX_OK; 5523 } 5524 5525 if (tso) 5526 tx_flags |= E1000_TX_FLAGS_TSO; 5527 else if (e1000_tx_csum(tx_ring, skb)) 5528 tx_flags |= E1000_TX_FLAGS_CSUM; 5529 5530 /* Old method was to assume IPv4 packet by default if TSO was enabled. 5531 * 82571 hardware supports TSO capabilities for IPv6 as well... 5532 * no longer assume, we must. 5533 */ 5534 if (skb->protocol == htons(ETH_P_IP)) 5535 tx_flags |= E1000_TX_FLAGS_IPV4; 5536 5537 if (unlikely(skb->no_fcs)) 5538 tx_flags |= E1000_TX_FLAGS_NO_FCS; 5539 5540 /* if count is 0 then mapping error has occurred */ 5541 count = e1000_tx_map(tx_ring, skb, first, adapter->tx_fifo_limit, 5542 nr_frags); 5543 if (count) { 5544 if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && 5545 !adapter->tx_hwtstamp_skb)) { 5546 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 5547 tx_flags |= E1000_TX_FLAGS_HWTSTAMP; 5548 adapter->tx_hwtstamp_skb = skb_get(skb); 5549 schedule_work(&adapter->tx_hwtstamp_work); 5550 } else { 5551 skb_tx_timestamp(skb); 5552 } 5553 5554 netdev_sent_queue(netdev, skb->len); 5555 e1000_tx_queue(tx_ring, tx_flags, count); 5556 /* Make sure there is space in the ring for the next send. */ 5557 e1000_maybe_stop_tx(tx_ring, 5558 (MAX_SKB_FRAGS * 5559 DIV_ROUND_UP(PAGE_SIZE, 5560 adapter->tx_fifo_limit) + 2)); 5561 } else { 5562 dev_kfree_skb_any(skb); 5563 tx_ring->buffer_info[first].time_stamp = 0; 5564 tx_ring->next_to_use = first; 5565 } 5566 5567 return NETDEV_TX_OK; 5568 } 5569 5570 /** 5571 * e1000_tx_timeout - Respond to a Tx Hang 5572 * @netdev: network interface device structure 5573 **/ 5574 static void e1000_tx_timeout(struct net_device *netdev) 5575 { 5576 struct e1000_adapter *adapter = netdev_priv(netdev); 5577 5578 /* Do the reset outside of interrupt context */ 5579 adapter->tx_timeout_count++; 5580 schedule_work(&adapter->reset_task); 5581 } 5582 5583 static void e1000_reset_task(struct work_struct *work) 5584 { 5585 struct e1000_adapter *adapter; 5586 adapter = container_of(work, struct e1000_adapter, reset_task); 5587 5588 /* don't run the task if already down */ 5589 if (test_bit(__E1000_DOWN, &adapter->state)) 5590 return; 5591 5592 if (!(adapter->flags & FLAG_RESTART_NOW)) { 5593 e1000e_dump(adapter); 5594 e_err("Reset adapter unexpectedly\n"); 5595 } 5596 e1000e_reinit_locked(adapter); 5597 } 5598 5599 /** 5600 * e1000_get_stats64 - Get System Network Statistics 5601 * @netdev: network interface device structure 5602 * @stats: rtnl_link_stats64 pointer 5603 * 5604 * Returns the address of the device statistics structure. 5605 **/ 5606 struct rtnl_link_stats64 *e1000e_get_stats64(struct net_device *netdev, 5607 struct rtnl_link_stats64 *stats) 5608 { 5609 struct e1000_adapter *adapter = netdev_priv(netdev); 5610 5611 memset(stats, 0, sizeof(struct rtnl_link_stats64)); 5612 spin_lock(&adapter->stats64_lock); 5613 e1000e_update_stats(adapter); 5614 /* Fill out the OS statistics structure */ 5615 stats->rx_bytes = adapter->stats.gorc; 5616 stats->rx_packets = adapter->stats.gprc; 5617 stats->tx_bytes = adapter->stats.gotc; 5618 stats->tx_packets = adapter->stats.gptc; 5619 stats->multicast = adapter->stats.mprc; 5620 stats->collisions = adapter->stats.colc; 5621 5622 /* Rx Errors */ 5623 5624 /* RLEC on some newer hardware can be incorrect so build 5625 * our own version based on RUC and ROC 5626 */ 5627 stats->rx_errors = adapter->stats.rxerrc + 5628 adapter->stats.crcerrs + adapter->stats.algnerrc + 5629 adapter->stats.ruc + adapter->stats.roc + adapter->stats.cexterr; 5630 stats->rx_length_errors = adapter->stats.ruc + adapter->stats.roc; 5631 stats->rx_crc_errors = adapter->stats.crcerrs; 5632 stats->rx_frame_errors = adapter->stats.algnerrc; 5633 stats->rx_missed_errors = adapter->stats.mpc; 5634 5635 /* Tx Errors */ 5636 stats->tx_errors = adapter->stats.ecol + adapter->stats.latecol; 5637 stats->tx_aborted_errors = adapter->stats.ecol; 5638 stats->tx_window_errors = adapter->stats.latecol; 5639 stats->tx_carrier_errors = adapter->stats.tncrs; 5640 5641 /* Tx Dropped needs to be maintained elsewhere */ 5642 5643 spin_unlock(&adapter->stats64_lock); 5644 return stats; 5645 } 5646 5647 /** 5648 * e1000_change_mtu - Change the Maximum Transfer Unit 5649 * @netdev: network interface device structure 5650 * @new_mtu: new value for maximum frame size 5651 * 5652 * Returns 0 on success, negative on failure 5653 **/ 5654 static int e1000_change_mtu(struct net_device *netdev, int new_mtu) 5655 { 5656 struct e1000_adapter *adapter = netdev_priv(netdev); 5657 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; 5658 5659 /* Jumbo frame support */ 5660 if ((max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) && 5661 !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) { 5662 e_err("Jumbo Frames not supported.\n"); 5663 return -EINVAL; 5664 } 5665 5666 /* Supported frame sizes */ 5667 if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) || 5668 (max_frame > adapter->max_hw_frame_size)) { 5669 e_err("Unsupported MTU setting\n"); 5670 return -EINVAL; 5671 } 5672 5673 /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */ 5674 if ((adapter->hw.mac.type >= e1000_pch2lan) && 5675 !(adapter->flags2 & FLAG2_CRC_STRIPPING) && 5676 (new_mtu > ETH_DATA_LEN)) { 5677 e_err("Jumbo Frames not supported on this device when CRC stripping is disabled.\n"); 5678 return -EINVAL; 5679 } 5680 5681 while (test_and_set_bit(__E1000_RESETTING, &adapter->state)) 5682 usleep_range(1000, 2000); 5683 /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */ 5684 adapter->max_frame_size = max_frame; 5685 e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu); 5686 netdev->mtu = new_mtu; 5687 if (netif_running(netdev)) 5688 e1000e_down(adapter); 5689 5690 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN 5691 * means we reserve 2 more, this pushes us to allocate from the next 5692 * larger slab size. 5693 * i.e. RXBUFFER_2048 --> size-4096 slab 5694 * However with the new *_jumbo_rx* routines, jumbo receives will use 5695 * fragmented skbs 5696 */ 5697 5698 if (max_frame <= 2048) 5699 adapter->rx_buffer_len = 2048; 5700 else 5701 adapter->rx_buffer_len = 4096; 5702 5703 /* adjust allocation if LPE protects us, and we aren't using SBP */ 5704 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) || 5705 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN)) 5706 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN 5707 + ETH_FCS_LEN; 5708 5709 if (netif_running(netdev)) 5710 e1000e_up(adapter); 5711 else 5712 e1000e_reset(adapter); 5713 5714 clear_bit(__E1000_RESETTING, &adapter->state); 5715 5716 return 0; 5717 } 5718 5719 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, 5720 int cmd) 5721 { 5722 struct e1000_adapter *adapter = netdev_priv(netdev); 5723 struct mii_ioctl_data *data = if_mii(ifr); 5724 5725 if (adapter->hw.phy.media_type != e1000_media_type_copper) 5726 return -EOPNOTSUPP; 5727 5728 switch (cmd) { 5729 case SIOCGMIIPHY: 5730 data->phy_id = adapter->hw.phy.addr; 5731 break; 5732 case SIOCGMIIREG: 5733 e1000_phy_read_status(adapter); 5734 5735 switch (data->reg_num & 0x1F) { 5736 case MII_BMCR: 5737 data->val_out = adapter->phy_regs.bmcr; 5738 break; 5739 case MII_BMSR: 5740 data->val_out = adapter->phy_regs.bmsr; 5741 break; 5742 case MII_PHYSID1: 5743 data->val_out = (adapter->hw.phy.id >> 16); 5744 break; 5745 case MII_PHYSID2: 5746 data->val_out = (adapter->hw.phy.id & 0xFFFF); 5747 break; 5748 case MII_ADVERTISE: 5749 data->val_out = adapter->phy_regs.advertise; 5750 break; 5751 case MII_LPA: 5752 data->val_out = adapter->phy_regs.lpa; 5753 break; 5754 case MII_EXPANSION: 5755 data->val_out = adapter->phy_regs.expansion; 5756 break; 5757 case MII_CTRL1000: 5758 data->val_out = adapter->phy_regs.ctrl1000; 5759 break; 5760 case MII_STAT1000: 5761 data->val_out = adapter->phy_regs.stat1000; 5762 break; 5763 case MII_ESTATUS: 5764 data->val_out = adapter->phy_regs.estatus; 5765 break; 5766 default: 5767 return -EIO; 5768 } 5769 break; 5770 case SIOCSMIIREG: 5771 default: 5772 return -EOPNOTSUPP; 5773 } 5774 return 0; 5775 } 5776 5777 /** 5778 * e1000e_hwtstamp_ioctl - control hardware time stamping 5779 * @netdev: network interface device structure 5780 * @ifreq: interface request 5781 * 5782 * Outgoing time stamping can be enabled and disabled. Play nice and 5783 * disable it when requested, although it shouldn't cause any overhead 5784 * when no packet needs it. At most one packet in the queue may be 5785 * marked for time stamping, otherwise it would be impossible to tell 5786 * for sure to which packet the hardware time stamp belongs. 5787 * 5788 * Incoming time stamping has to be configured via the hardware filters. 5789 * Not all combinations are supported, in particular event type has to be 5790 * specified. Matching the kind of event packet is not supported, with the 5791 * exception of "all V2 events regardless of level 2 or 4". 5792 **/ 5793 static int e1000e_hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr) 5794 { 5795 struct e1000_adapter *adapter = netdev_priv(netdev); 5796 struct hwtstamp_config config; 5797 int ret_val; 5798 5799 if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) 5800 return -EFAULT; 5801 5802 ret_val = e1000e_config_hwtstamp(adapter, &config); 5803 if (ret_val) 5804 return ret_val; 5805 5806 switch (config.rx_filter) { 5807 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 5808 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 5809 case HWTSTAMP_FILTER_PTP_V2_SYNC: 5810 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 5811 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 5812 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 5813 /* With V2 type filters which specify a Sync or Delay Request, 5814 * Path Delay Request/Response messages are also time stamped 5815 * by hardware so notify the caller the requested packets plus 5816 * some others are time stamped. 5817 */ 5818 config.rx_filter = HWTSTAMP_FILTER_SOME; 5819 break; 5820 default: 5821 break; 5822 } 5823 5824 return copy_to_user(ifr->ifr_data, &config, 5825 sizeof(config)) ? -EFAULT : 0; 5826 } 5827 5828 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 5829 { 5830 switch (cmd) { 5831 case SIOCGMIIPHY: 5832 case SIOCGMIIREG: 5833 case SIOCSMIIREG: 5834 return e1000_mii_ioctl(netdev, ifr, cmd); 5835 case SIOCSHWTSTAMP: 5836 return e1000e_hwtstamp_ioctl(netdev, ifr); 5837 default: 5838 return -EOPNOTSUPP; 5839 } 5840 } 5841 5842 static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc) 5843 { 5844 struct e1000_hw *hw = &adapter->hw; 5845 u32 i, mac_reg; 5846 u16 phy_reg, wuc_enable; 5847 int retval; 5848 5849 /* copy MAC RARs to PHY RARs */ 5850 e1000_copy_rx_addrs_to_phy_ich8lan(hw); 5851 5852 retval = hw->phy.ops.acquire(hw); 5853 if (retval) { 5854 e_err("Could not acquire PHY\n"); 5855 return retval; 5856 } 5857 5858 /* Enable access to wakeup registers on and set page to BM_WUC_PAGE */ 5859 retval = e1000_enable_phy_wakeup_reg_access_bm(hw, &wuc_enable); 5860 if (retval) 5861 goto release; 5862 5863 /* copy MAC MTA to PHY MTA - only needed for pchlan */ 5864 for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) { 5865 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i); 5866 hw->phy.ops.write_reg_page(hw, BM_MTA(i), 5867 (u16)(mac_reg & 0xFFFF)); 5868 hw->phy.ops.write_reg_page(hw, BM_MTA(i) + 1, 5869 (u16)((mac_reg >> 16) & 0xFFFF)); 5870 } 5871 5872 /* configure PHY Rx Control register */ 5873 hw->phy.ops.read_reg_page(&adapter->hw, BM_RCTL, &phy_reg); 5874 mac_reg = er32(RCTL); 5875 if (mac_reg & E1000_RCTL_UPE) 5876 phy_reg |= BM_RCTL_UPE; 5877 if (mac_reg & E1000_RCTL_MPE) 5878 phy_reg |= BM_RCTL_MPE; 5879 phy_reg &= ~(BM_RCTL_MO_MASK); 5880 if (mac_reg & E1000_RCTL_MO_3) 5881 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT) 5882 << BM_RCTL_MO_SHIFT); 5883 if (mac_reg & E1000_RCTL_BAM) 5884 phy_reg |= BM_RCTL_BAM; 5885 if (mac_reg & E1000_RCTL_PMCF) 5886 phy_reg |= BM_RCTL_PMCF; 5887 mac_reg = er32(CTRL); 5888 if (mac_reg & E1000_CTRL_RFCE) 5889 phy_reg |= BM_RCTL_RFCE; 5890 hw->phy.ops.write_reg_page(&adapter->hw, BM_RCTL, phy_reg); 5891 5892 /* enable PHY wakeup in MAC register */ 5893 ew32(WUFC, wufc); 5894 ew32(WUC, E1000_WUC_PHY_WAKE | E1000_WUC_PME_EN); 5895 5896 /* configure and enable PHY wakeup in PHY registers */ 5897 hw->phy.ops.write_reg_page(&adapter->hw, BM_WUFC, wufc); 5898 hw->phy.ops.write_reg_page(&adapter->hw, BM_WUC, E1000_WUC_PME_EN); 5899 5900 /* activate PHY wakeup */ 5901 wuc_enable |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT; 5902 retval = e1000_disable_phy_wakeup_reg_access_bm(hw, &wuc_enable); 5903 if (retval) 5904 e_err("Could not set PHY Host Wakeup bit\n"); 5905 release: 5906 hw->phy.ops.release(hw); 5907 5908 return retval; 5909 } 5910 5911 static int __e1000_shutdown(struct pci_dev *pdev, bool runtime) 5912 { 5913 struct net_device *netdev = pci_get_drvdata(pdev); 5914 struct e1000_adapter *adapter = netdev_priv(netdev); 5915 struct e1000_hw *hw = &adapter->hw; 5916 u32 ctrl, ctrl_ext, rctl, status; 5917 /* Runtime suspend should only enable wakeup for link changes */ 5918 u32 wufc = runtime ? E1000_WUFC_LNKC : adapter->wol; 5919 int retval = 0; 5920 5921 netif_device_detach(netdev); 5922 5923 if (netif_running(netdev)) { 5924 int count = E1000_CHECK_RESET_COUNT; 5925 5926 while (test_bit(__E1000_RESETTING, &adapter->state) && count--) 5927 usleep_range(10000, 20000); 5928 5929 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state)); 5930 e1000e_down(adapter); 5931 e1000_free_irq(adapter); 5932 } 5933 e1000e_reset_interrupt_capability(adapter); 5934 5935 status = er32(STATUS); 5936 if (status & E1000_STATUS_LU) 5937 wufc &= ~E1000_WUFC_LNKC; 5938 5939 if (wufc) { 5940 e1000_setup_rctl(adapter); 5941 e1000e_set_rx_mode(netdev); 5942 5943 /* turn on all-multi mode if wake on multicast is enabled */ 5944 if (wufc & E1000_WUFC_MC) { 5945 rctl = er32(RCTL); 5946 rctl |= E1000_RCTL_MPE; 5947 ew32(RCTL, rctl); 5948 } 5949 5950 ctrl = er32(CTRL); 5951 ctrl |= E1000_CTRL_ADVD3WUC; 5952 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP)) 5953 ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT; 5954 ew32(CTRL, ctrl); 5955 5956 if (adapter->hw.phy.media_type == e1000_media_type_fiber || 5957 adapter->hw.phy.media_type == 5958 e1000_media_type_internal_serdes) { 5959 /* keep the laser running in D3 */ 5960 ctrl_ext = er32(CTRL_EXT); 5961 ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA; 5962 ew32(CTRL_EXT, ctrl_ext); 5963 } 5964 5965 if (adapter->flags & FLAG_IS_ICH) 5966 e1000_suspend_workarounds_ich8lan(&adapter->hw); 5967 5968 /* Allow time for pending master requests to run */ 5969 e1000e_disable_pcie_master(&adapter->hw); 5970 5971 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) { 5972 /* enable wakeup by the PHY */ 5973 retval = e1000_init_phy_wakeup(adapter, wufc); 5974 if (retval) 5975 return retval; 5976 } else { 5977 /* enable wakeup by the MAC */ 5978 ew32(WUFC, wufc); 5979 ew32(WUC, E1000_WUC_PME_EN); 5980 } 5981 } else { 5982 ew32(WUC, 0); 5983 ew32(WUFC, 0); 5984 } 5985 5986 if (adapter->hw.phy.type == e1000_phy_igp_3) 5987 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw); 5988 5989 /* Release control of h/w to f/w. If f/w is AMT enabled, this 5990 * would have already happened in close and is redundant. 5991 */ 5992 e1000e_release_hw_control(adapter); 5993 5994 pci_clear_master(pdev); 5995 5996 /* The pci-e switch on some quad port adapters will report a 5997 * correctable error when the MAC transitions from D0 to D3. To 5998 * prevent this we need to mask off the correctable errors on the 5999 * downstream port of the pci-e switch. 6000 * 6001 * We don't have the associated upstream bridge while assigning 6002 * the PCI device into guest. For example, the KVM on power is 6003 * one of the cases. 6004 */ 6005 if (adapter->flags & FLAG_IS_QUAD_PORT) { 6006 struct pci_dev *us_dev = pdev->bus->self; 6007 u16 devctl; 6008 6009 if (!us_dev) 6010 return 0; 6011 6012 pcie_capability_read_word(us_dev, PCI_EXP_DEVCTL, &devctl); 6013 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL, 6014 (devctl & ~PCI_EXP_DEVCTL_CERE)); 6015 6016 pci_save_state(pdev); 6017 pci_prepare_to_sleep(pdev); 6018 6019 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL, devctl); 6020 } 6021 6022 return 0; 6023 } 6024 6025 /** 6026 * e1000e_disable_aspm - Disable ASPM states 6027 * @pdev: pointer to PCI device struct 6028 * @state: bit-mask of ASPM states to disable 6029 * 6030 * Some devices *must* have certain ASPM states disabled per hardware errata. 6031 **/ 6032 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state) 6033 { 6034 struct pci_dev *parent = pdev->bus->self; 6035 u16 aspm_dis_mask = 0; 6036 u16 pdev_aspmc, parent_aspmc; 6037 6038 switch (state) { 6039 case PCIE_LINK_STATE_L0S: 6040 case PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1: 6041 aspm_dis_mask |= PCI_EXP_LNKCTL_ASPM_L0S; 6042 /* fall-through - can't have L1 without L0s */ 6043 case PCIE_LINK_STATE_L1: 6044 aspm_dis_mask |= PCI_EXP_LNKCTL_ASPM_L1; 6045 break; 6046 default: 6047 return; 6048 } 6049 6050 pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &pdev_aspmc); 6051 pdev_aspmc &= PCI_EXP_LNKCTL_ASPMC; 6052 6053 if (parent) { 6054 pcie_capability_read_word(parent, PCI_EXP_LNKCTL, 6055 &parent_aspmc); 6056 parent_aspmc &= PCI_EXP_LNKCTL_ASPMC; 6057 } 6058 6059 /* Nothing to do if the ASPM states to be disabled already are */ 6060 if (!(pdev_aspmc & aspm_dis_mask) && 6061 (!parent || !(parent_aspmc & aspm_dis_mask))) 6062 return; 6063 6064 dev_info(&pdev->dev, "Disabling ASPM %s %s\n", 6065 (aspm_dis_mask & pdev_aspmc & PCI_EXP_LNKCTL_ASPM_L0S) ? 6066 "L0s" : "", 6067 (aspm_dis_mask & pdev_aspmc & PCI_EXP_LNKCTL_ASPM_L1) ? 6068 "L1" : ""); 6069 6070 #ifdef CONFIG_PCIEASPM 6071 pci_disable_link_state_locked(pdev, state); 6072 6073 /* Double-check ASPM control. If not disabled by the above, the 6074 * BIOS is preventing that from happening (or CONFIG_PCIEASPM is 6075 * not enabled); override by writing PCI config space directly. 6076 */ 6077 pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &pdev_aspmc); 6078 pdev_aspmc &= PCI_EXP_LNKCTL_ASPMC; 6079 6080 if (!(aspm_dis_mask & pdev_aspmc)) 6081 return; 6082 #endif 6083 6084 /* Both device and parent should have the same ASPM setting. 6085 * Disable ASPM in downstream component first and then upstream. 6086 */ 6087 pcie_capability_clear_word(pdev, PCI_EXP_LNKCTL, aspm_dis_mask); 6088 6089 if (parent) 6090 pcie_capability_clear_word(parent, PCI_EXP_LNKCTL, 6091 aspm_dis_mask); 6092 } 6093 6094 #ifdef CONFIG_PM 6095 static bool e1000e_pm_ready(struct e1000_adapter *adapter) 6096 { 6097 return !!adapter->tx_ring->buffer_info; 6098 } 6099 6100 static int __e1000_resume(struct pci_dev *pdev) 6101 { 6102 struct net_device *netdev = pci_get_drvdata(pdev); 6103 struct e1000_adapter *adapter = netdev_priv(netdev); 6104 struct e1000_hw *hw = &adapter->hw; 6105 u16 aspm_disable_flag = 0; 6106 u32 err; 6107 6108 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S) 6109 aspm_disable_flag = PCIE_LINK_STATE_L0S; 6110 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1) 6111 aspm_disable_flag |= PCIE_LINK_STATE_L1; 6112 if (aspm_disable_flag) 6113 e1000e_disable_aspm(pdev, aspm_disable_flag); 6114 6115 pci_set_master(pdev); 6116 6117 e1000e_set_interrupt_capability(adapter); 6118 if (netif_running(netdev)) { 6119 err = e1000_request_irq(adapter); 6120 if (err) 6121 return err; 6122 } 6123 6124 if (hw->mac.type >= e1000_pch2lan) 6125 e1000_resume_workarounds_pchlan(&adapter->hw); 6126 6127 e1000e_power_up_phy(adapter); 6128 6129 /* report the system wakeup cause from S3/S4 */ 6130 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) { 6131 u16 phy_data; 6132 6133 e1e_rphy(&adapter->hw, BM_WUS, &phy_data); 6134 if (phy_data) { 6135 e_info("PHY Wakeup cause - %s\n", 6136 phy_data & E1000_WUS_EX ? "Unicast Packet" : 6137 phy_data & E1000_WUS_MC ? "Multicast Packet" : 6138 phy_data & E1000_WUS_BC ? "Broadcast Packet" : 6139 phy_data & E1000_WUS_MAG ? "Magic Packet" : 6140 phy_data & E1000_WUS_LNKC ? 6141 "Link Status Change" : "other"); 6142 } 6143 e1e_wphy(&adapter->hw, BM_WUS, ~0); 6144 } else { 6145 u32 wus = er32(WUS); 6146 if (wus) { 6147 e_info("MAC Wakeup cause - %s\n", 6148 wus & E1000_WUS_EX ? "Unicast Packet" : 6149 wus & E1000_WUS_MC ? "Multicast Packet" : 6150 wus & E1000_WUS_BC ? "Broadcast Packet" : 6151 wus & E1000_WUS_MAG ? "Magic Packet" : 6152 wus & E1000_WUS_LNKC ? "Link Status Change" : 6153 "other"); 6154 } 6155 ew32(WUS, ~0); 6156 } 6157 6158 e1000e_reset(adapter); 6159 6160 e1000_init_manageability_pt(adapter); 6161 6162 if (netif_running(netdev)) 6163 e1000e_up(adapter); 6164 6165 netif_device_attach(netdev); 6166 6167 /* If the controller has AMT, do not set DRV_LOAD until the interface 6168 * is up. For all other cases, let the f/w know that the h/w is now 6169 * under the control of the driver. 6170 */ 6171 if (!(adapter->flags & FLAG_HAS_AMT)) 6172 e1000e_get_hw_control(adapter); 6173 6174 return 0; 6175 } 6176 6177 #ifdef CONFIG_PM 6178 static int e1000_suspend(struct device *dev) 6179 { 6180 struct pci_dev *pdev = to_pci_dev(dev); 6181 6182 return __e1000_shutdown(pdev, false); 6183 } 6184 6185 static int e1000_resume(struct device *dev) 6186 { 6187 struct pci_dev *pdev = to_pci_dev(dev); 6188 struct net_device *netdev = pci_get_drvdata(pdev); 6189 struct e1000_adapter *adapter = netdev_priv(netdev); 6190 6191 if (e1000e_pm_ready(adapter)) 6192 adapter->idle_check = true; 6193 6194 return __e1000_resume(pdev); 6195 } 6196 #endif /* CONFIG_PM */ 6197 6198 #ifdef CONFIG_PM_RUNTIME 6199 static int e1000_runtime_suspend(struct device *dev) 6200 { 6201 struct pci_dev *pdev = to_pci_dev(dev); 6202 struct net_device *netdev = pci_get_drvdata(pdev); 6203 struct e1000_adapter *adapter = netdev_priv(netdev); 6204 6205 if (!e1000e_pm_ready(adapter)) 6206 return 0; 6207 6208 return __e1000_shutdown(pdev, true); 6209 } 6210 6211 static int e1000_idle(struct device *dev) 6212 { 6213 struct pci_dev *pdev = to_pci_dev(dev); 6214 struct net_device *netdev = pci_get_drvdata(pdev); 6215 struct e1000_adapter *adapter = netdev_priv(netdev); 6216 6217 if (!e1000e_pm_ready(adapter)) 6218 return 0; 6219 6220 if (adapter->idle_check) { 6221 adapter->idle_check = false; 6222 if (!e1000e_has_link(adapter)) 6223 pm_schedule_suspend(dev, MSEC_PER_SEC); 6224 } 6225 6226 return -EBUSY; 6227 } 6228 6229 static int e1000_runtime_resume(struct device *dev) 6230 { 6231 struct pci_dev *pdev = to_pci_dev(dev); 6232 struct net_device *netdev = pci_get_drvdata(pdev); 6233 struct e1000_adapter *adapter = netdev_priv(netdev); 6234 6235 if (!e1000e_pm_ready(adapter)) 6236 return 0; 6237 6238 adapter->idle_check = !dev->power.runtime_auto; 6239 return __e1000_resume(pdev); 6240 } 6241 #endif /* CONFIG_PM_RUNTIME */ 6242 #endif /* CONFIG_PM */ 6243 6244 static void e1000_shutdown(struct pci_dev *pdev) 6245 { 6246 __e1000_shutdown(pdev, false); 6247 } 6248 6249 #ifdef CONFIG_NET_POLL_CONTROLLER 6250 6251 static irqreturn_t e1000_intr_msix(int __always_unused irq, void *data) 6252 { 6253 struct net_device *netdev = data; 6254 struct e1000_adapter *adapter = netdev_priv(netdev); 6255 6256 if (adapter->msix_entries) { 6257 int vector, msix_irq; 6258 6259 vector = 0; 6260 msix_irq = adapter->msix_entries[vector].vector; 6261 disable_irq(msix_irq); 6262 e1000_intr_msix_rx(msix_irq, netdev); 6263 enable_irq(msix_irq); 6264 6265 vector++; 6266 msix_irq = adapter->msix_entries[vector].vector; 6267 disable_irq(msix_irq); 6268 e1000_intr_msix_tx(msix_irq, netdev); 6269 enable_irq(msix_irq); 6270 6271 vector++; 6272 msix_irq = adapter->msix_entries[vector].vector; 6273 disable_irq(msix_irq); 6274 e1000_msix_other(msix_irq, netdev); 6275 enable_irq(msix_irq); 6276 } 6277 6278 return IRQ_HANDLED; 6279 } 6280 6281 /** 6282 * e1000_netpoll 6283 * @netdev: network interface device structure 6284 * 6285 * Polling 'interrupt' - used by things like netconsole to send skbs 6286 * without having to re-enable interrupts. It's not called while 6287 * the interrupt routine is executing. 6288 */ 6289 static void e1000_netpoll(struct net_device *netdev) 6290 { 6291 struct e1000_adapter *adapter = netdev_priv(netdev); 6292 6293 switch (adapter->int_mode) { 6294 case E1000E_INT_MODE_MSIX: 6295 e1000_intr_msix(adapter->pdev->irq, netdev); 6296 break; 6297 case E1000E_INT_MODE_MSI: 6298 disable_irq(adapter->pdev->irq); 6299 e1000_intr_msi(adapter->pdev->irq, netdev); 6300 enable_irq(adapter->pdev->irq); 6301 break; 6302 default: /* E1000E_INT_MODE_LEGACY */ 6303 disable_irq(adapter->pdev->irq); 6304 e1000_intr(adapter->pdev->irq, netdev); 6305 enable_irq(adapter->pdev->irq); 6306 break; 6307 } 6308 } 6309 #endif 6310 6311 /** 6312 * e1000_io_error_detected - called when PCI error is detected 6313 * @pdev: Pointer to PCI device 6314 * @state: The current pci connection state 6315 * 6316 * This function is called after a PCI bus error affecting 6317 * this device has been detected. 6318 */ 6319 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, 6320 pci_channel_state_t state) 6321 { 6322 struct net_device *netdev = pci_get_drvdata(pdev); 6323 struct e1000_adapter *adapter = netdev_priv(netdev); 6324 6325 netif_device_detach(netdev); 6326 6327 if (state == pci_channel_io_perm_failure) 6328 return PCI_ERS_RESULT_DISCONNECT; 6329 6330 if (netif_running(netdev)) 6331 e1000e_down(adapter); 6332 pci_disable_device(pdev); 6333 6334 /* Request a slot slot reset. */ 6335 return PCI_ERS_RESULT_NEED_RESET; 6336 } 6337 6338 /** 6339 * e1000_io_slot_reset - called after the pci bus has been reset. 6340 * @pdev: Pointer to PCI device 6341 * 6342 * Restart the card from scratch, as if from a cold-boot. Implementation 6343 * resembles the first-half of the e1000_resume routine. 6344 */ 6345 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev) 6346 { 6347 struct net_device *netdev = pci_get_drvdata(pdev); 6348 struct e1000_adapter *adapter = netdev_priv(netdev); 6349 struct e1000_hw *hw = &adapter->hw; 6350 u16 aspm_disable_flag = 0; 6351 int err; 6352 pci_ers_result_t result; 6353 6354 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S) 6355 aspm_disable_flag = PCIE_LINK_STATE_L0S; 6356 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1) 6357 aspm_disable_flag |= PCIE_LINK_STATE_L1; 6358 if (aspm_disable_flag) 6359 e1000e_disable_aspm(pdev, aspm_disable_flag); 6360 6361 err = pci_enable_device_mem(pdev); 6362 if (err) { 6363 dev_err(&pdev->dev, 6364 "Cannot re-enable PCI device after reset.\n"); 6365 result = PCI_ERS_RESULT_DISCONNECT; 6366 } else { 6367 pdev->state_saved = true; 6368 pci_restore_state(pdev); 6369 pci_set_master(pdev); 6370 6371 pci_enable_wake(pdev, PCI_D3hot, 0); 6372 pci_enable_wake(pdev, PCI_D3cold, 0); 6373 6374 e1000e_reset(adapter); 6375 ew32(WUS, ~0); 6376 result = PCI_ERS_RESULT_RECOVERED; 6377 } 6378 6379 pci_cleanup_aer_uncorrect_error_status(pdev); 6380 6381 return result; 6382 } 6383 6384 /** 6385 * e1000_io_resume - called when traffic can start flowing again. 6386 * @pdev: Pointer to PCI device 6387 * 6388 * This callback is called when the error recovery driver tells us that 6389 * its OK to resume normal operation. Implementation resembles the 6390 * second-half of the e1000_resume routine. 6391 */ 6392 static void e1000_io_resume(struct pci_dev *pdev) 6393 { 6394 struct net_device *netdev = pci_get_drvdata(pdev); 6395 struct e1000_adapter *adapter = netdev_priv(netdev); 6396 6397 e1000_init_manageability_pt(adapter); 6398 6399 if (netif_running(netdev)) { 6400 if (e1000e_up(adapter)) { 6401 dev_err(&pdev->dev, 6402 "can't bring device back up after reset\n"); 6403 return; 6404 } 6405 } 6406 6407 netif_device_attach(netdev); 6408 6409 /* If the controller has AMT, do not set DRV_LOAD until the interface 6410 * is up. For all other cases, let the f/w know that the h/w is now 6411 * under the control of the driver. 6412 */ 6413 if (!(adapter->flags & FLAG_HAS_AMT)) 6414 e1000e_get_hw_control(adapter); 6415 } 6416 6417 static void e1000_print_device_info(struct e1000_adapter *adapter) 6418 { 6419 struct e1000_hw *hw = &adapter->hw; 6420 struct net_device *netdev = adapter->netdev; 6421 u32 ret_val; 6422 u8 pba_str[E1000_PBANUM_LENGTH]; 6423 6424 /* print bus type/speed/width info */ 6425 e_info("(PCI Express:2.5GT/s:%s) %pM\n", 6426 /* bus width */ 6427 ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" : 6428 "Width x1"), 6429 /* MAC address */ 6430 netdev->dev_addr); 6431 e_info("Intel(R) PRO/%s Network Connection\n", 6432 (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000"); 6433 ret_val = e1000_read_pba_string_generic(hw, pba_str, 6434 E1000_PBANUM_LENGTH); 6435 if (ret_val) 6436 strlcpy((char *)pba_str, "Unknown", sizeof(pba_str)); 6437 e_info("MAC: %d, PHY: %d, PBA No: %s\n", 6438 hw->mac.type, hw->phy.type, pba_str); 6439 } 6440 6441 static void e1000_eeprom_checks(struct e1000_adapter *adapter) 6442 { 6443 struct e1000_hw *hw = &adapter->hw; 6444 int ret_val; 6445 u16 buf = 0; 6446 6447 if (hw->mac.type != e1000_82573) 6448 return; 6449 6450 ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf); 6451 le16_to_cpus(&buf); 6452 if (!ret_val && (!(buf & (1 << 0)))) { 6453 /* Deep Smart Power Down (DSPD) */ 6454 dev_warn(&adapter->pdev->dev, 6455 "Warning: detected DSPD enabled in EEPROM\n"); 6456 } 6457 } 6458 6459 static int e1000_set_features(struct net_device *netdev, 6460 netdev_features_t features) 6461 { 6462 struct e1000_adapter *adapter = netdev_priv(netdev); 6463 netdev_features_t changed = features ^ netdev->features; 6464 6465 if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) 6466 adapter->flags |= FLAG_TSO_FORCE; 6467 6468 if (!(changed & (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX | 6469 NETIF_F_RXCSUM | NETIF_F_RXHASH | NETIF_F_RXFCS | 6470 NETIF_F_RXALL))) 6471 return 0; 6472 6473 if (changed & NETIF_F_RXFCS) { 6474 if (features & NETIF_F_RXFCS) { 6475 adapter->flags2 &= ~FLAG2_CRC_STRIPPING; 6476 } else { 6477 /* We need to take it back to defaults, which might mean 6478 * stripping is still disabled at the adapter level. 6479 */ 6480 if (adapter->flags2 & FLAG2_DFLT_CRC_STRIPPING) 6481 adapter->flags2 |= FLAG2_CRC_STRIPPING; 6482 else 6483 adapter->flags2 &= ~FLAG2_CRC_STRIPPING; 6484 } 6485 } 6486 6487 netdev->features = features; 6488 6489 if (netif_running(netdev)) 6490 e1000e_reinit_locked(adapter); 6491 else 6492 e1000e_reset(adapter); 6493 6494 return 0; 6495 } 6496 6497 static const struct net_device_ops e1000e_netdev_ops = { 6498 .ndo_open = e1000_open, 6499 .ndo_stop = e1000_close, 6500 .ndo_start_xmit = e1000_xmit_frame, 6501 .ndo_get_stats64 = e1000e_get_stats64, 6502 .ndo_set_rx_mode = e1000e_set_rx_mode, 6503 .ndo_set_mac_address = e1000_set_mac, 6504 .ndo_change_mtu = e1000_change_mtu, 6505 .ndo_do_ioctl = e1000_ioctl, 6506 .ndo_tx_timeout = e1000_tx_timeout, 6507 .ndo_validate_addr = eth_validate_addr, 6508 6509 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid, 6510 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid, 6511 #ifdef CONFIG_NET_POLL_CONTROLLER 6512 .ndo_poll_controller = e1000_netpoll, 6513 #endif 6514 .ndo_set_features = e1000_set_features, 6515 }; 6516 6517 /** 6518 * e1000_probe - Device Initialization Routine 6519 * @pdev: PCI device information struct 6520 * @ent: entry in e1000_pci_tbl 6521 * 6522 * Returns 0 on success, negative on failure 6523 * 6524 * e1000_probe initializes an adapter identified by a pci_dev structure. 6525 * The OS initialization, configuring of the adapter private structure, 6526 * and a hardware reset occur. 6527 **/ 6528 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 6529 { 6530 struct net_device *netdev; 6531 struct e1000_adapter *adapter; 6532 struct e1000_hw *hw; 6533 const struct e1000_info *ei = e1000_info_tbl[ent->driver_data]; 6534 resource_size_t mmio_start, mmio_len; 6535 resource_size_t flash_start, flash_len; 6536 static int cards_found; 6537 u16 aspm_disable_flag = 0; 6538 int bars, i, err, pci_using_dac; 6539 u16 eeprom_data = 0; 6540 u16 eeprom_apme_mask = E1000_EEPROM_APME; 6541 6542 if (ei->flags2 & FLAG2_DISABLE_ASPM_L0S) 6543 aspm_disable_flag = PCIE_LINK_STATE_L0S; 6544 if (ei->flags2 & FLAG2_DISABLE_ASPM_L1) 6545 aspm_disable_flag |= PCIE_LINK_STATE_L1; 6546 if (aspm_disable_flag) 6547 e1000e_disable_aspm(pdev, aspm_disable_flag); 6548 6549 err = pci_enable_device_mem(pdev); 6550 if (err) 6551 return err; 6552 6553 pci_using_dac = 0; 6554 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 6555 if (!err) { 6556 pci_using_dac = 1; 6557 } else { 6558 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 6559 if (err) { 6560 dev_err(&pdev->dev, 6561 "No usable DMA configuration, aborting\n"); 6562 goto err_dma; 6563 } 6564 } 6565 6566 bars = pci_select_bars(pdev, IORESOURCE_MEM); 6567 err = pci_request_selected_regions_exclusive(pdev, bars, 6568 e1000e_driver_name); 6569 if (err) 6570 goto err_pci_reg; 6571 6572 /* AER (Advanced Error Reporting) hooks */ 6573 pci_enable_pcie_error_reporting(pdev); 6574 6575 pci_set_master(pdev); 6576 /* PCI config space info */ 6577 err = pci_save_state(pdev); 6578 if (err) 6579 goto err_alloc_etherdev; 6580 6581 err = -ENOMEM; 6582 netdev = alloc_etherdev(sizeof(struct e1000_adapter)); 6583 if (!netdev) 6584 goto err_alloc_etherdev; 6585 6586 SET_NETDEV_DEV(netdev, &pdev->dev); 6587 6588 netdev->irq = pdev->irq; 6589 6590 pci_set_drvdata(pdev, netdev); 6591 adapter = netdev_priv(netdev); 6592 hw = &adapter->hw; 6593 adapter->netdev = netdev; 6594 adapter->pdev = pdev; 6595 adapter->ei = ei; 6596 adapter->pba = ei->pba; 6597 adapter->flags = ei->flags; 6598 adapter->flags2 = ei->flags2; 6599 adapter->hw.adapter = adapter; 6600 adapter->hw.mac.type = ei->mac; 6601 adapter->max_hw_frame_size = ei->max_hw_frame_size; 6602 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); 6603 6604 mmio_start = pci_resource_start(pdev, 0); 6605 mmio_len = pci_resource_len(pdev, 0); 6606 6607 err = -EIO; 6608 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len); 6609 if (!adapter->hw.hw_addr) 6610 goto err_ioremap; 6611 6612 if ((adapter->flags & FLAG_HAS_FLASH) && 6613 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) { 6614 flash_start = pci_resource_start(pdev, 1); 6615 flash_len = pci_resource_len(pdev, 1); 6616 adapter->hw.flash_address = ioremap(flash_start, flash_len); 6617 if (!adapter->hw.flash_address) 6618 goto err_flashmap; 6619 } 6620 6621 /* Set default EEE advertisement */ 6622 if (adapter->flags2 & FLAG2_HAS_EEE) 6623 adapter->eee_advert = MDIO_EEE_100TX | MDIO_EEE_1000T; 6624 6625 /* construct the net_device struct */ 6626 netdev->netdev_ops = &e1000e_netdev_ops; 6627 e1000e_set_ethtool_ops(netdev); 6628 netdev->watchdog_timeo = 5 * HZ; 6629 netif_napi_add(netdev, &adapter->napi, e1000e_poll, 64); 6630 strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name)); 6631 6632 netdev->mem_start = mmio_start; 6633 netdev->mem_end = mmio_start + mmio_len; 6634 6635 adapter->bd_number = cards_found++; 6636 6637 e1000e_check_options(adapter); 6638 6639 /* setup adapter struct */ 6640 err = e1000_sw_init(adapter); 6641 if (err) 6642 goto err_sw_init; 6643 6644 memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops)); 6645 memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops)); 6646 memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops)); 6647 6648 err = ei->get_variants(adapter); 6649 if (err) 6650 goto err_hw_init; 6651 6652 if ((adapter->flags & FLAG_IS_ICH) && 6653 (adapter->flags & FLAG_READ_ONLY_NVM)) 6654 e1000e_write_protect_nvm_ich8lan(&adapter->hw); 6655 6656 hw->mac.ops.get_bus_info(&adapter->hw); 6657 6658 adapter->hw.phy.autoneg_wait_to_complete = 0; 6659 6660 /* Copper options */ 6661 if (adapter->hw.phy.media_type == e1000_media_type_copper) { 6662 adapter->hw.phy.mdix = AUTO_ALL_MODES; 6663 adapter->hw.phy.disable_polarity_correction = 0; 6664 adapter->hw.phy.ms_type = e1000_ms_hw_default; 6665 } 6666 6667 if (hw->phy.ops.check_reset_block && hw->phy.ops.check_reset_block(hw)) 6668 dev_info(&pdev->dev, 6669 "PHY reset is blocked due to SOL/IDER session.\n"); 6670 6671 /* Set initial default active device features */ 6672 netdev->features = (NETIF_F_SG | 6673 NETIF_F_HW_VLAN_CTAG_RX | 6674 NETIF_F_HW_VLAN_CTAG_TX | 6675 NETIF_F_TSO | 6676 NETIF_F_TSO6 | 6677 NETIF_F_RXHASH | 6678 NETIF_F_RXCSUM | 6679 NETIF_F_HW_CSUM); 6680 6681 /* Set user-changeable features (subset of all device features) */ 6682 netdev->hw_features = netdev->features; 6683 netdev->hw_features |= NETIF_F_RXFCS; 6684 netdev->priv_flags |= IFF_SUPP_NOFCS; 6685 netdev->hw_features |= NETIF_F_RXALL; 6686 6687 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) 6688 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 6689 6690 netdev->vlan_features |= (NETIF_F_SG | 6691 NETIF_F_TSO | 6692 NETIF_F_TSO6 | 6693 NETIF_F_HW_CSUM); 6694 6695 netdev->priv_flags |= IFF_UNICAST_FLT; 6696 6697 if (pci_using_dac) { 6698 netdev->features |= NETIF_F_HIGHDMA; 6699 netdev->vlan_features |= NETIF_F_HIGHDMA; 6700 } 6701 6702 if (e1000e_enable_mng_pass_thru(&adapter->hw)) 6703 adapter->flags |= FLAG_MNG_PT_ENABLED; 6704 6705 /* before reading the NVM, reset the controller to 6706 * put the device in a known good starting state 6707 */ 6708 adapter->hw.mac.ops.reset_hw(&adapter->hw); 6709 6710 /* systems with ASPM and others may see the checksum fail on the first 6711 * attempt. Let's give it a few tries 6712 */ 6713 for (i = 0;; i++) { 6714 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0) 6715 break; 6716 if (i == 2) { 6717 dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n"); 6718 err = -EIO; 6719 goto err_eeprom; 6720 } 6721 } 6722 6723 e1000_eeprom_checks(adapter); 6724 6725 /* copy the MAC address */ 6726 if (e1000e_read_mac_addr(&adapter->hw)) 6727 dev_err(&pdev->dev, 6728 "NVM Read Error while reading MAC address\n"); 6729 6730 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len); 6731 6732 if (!is_valid_ether_addr(netdev->dev_addr)) { 6733 dev_err(&pdev->dev, "Invalid MAC Address: %pM\n", 6734 netdev->dev_addr); 6735 err = -EIO; 6736 goto err_eeprom; 6737 } 6738 6739 init_timer(&adapter->watchdog_timer); 6740 adapter->watchdog_timer.function = e1000_watchdog; 6741 adapter->watchdog_timer.data = (unsigned long)adapter; 6742 6743 init_timer(&adapter->phy_info_timer); 6744 adapter->phy_info_timer.function = e1000_update_phy_info; 6745 adapter->phy_info_timer.data = (unsigned long)adapter; 6746 6747 INIT_WORK(&adapter->reset_task, e1000_reset_task); 6748 INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task); 6749 INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround); 6750 INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task); 6751 INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang); 6752 6753 /* Initialize link parameters. User can change them with ethtool */ 6754 adapter->hw.mac.autoneg = 1; 6755 adapter->fc_autoneg = true; 6756 adapter->hw.fc.requested_mode = e1000_fc_default; 6757 adapter->hw.fc.current_mode = e1000_fc_default; 6758 adapter->hw.phy.autoneg_advertised = 0x2f; 6759 6760 /* Initial Wake on LAN setting - If APM wake is enabled in 6761 * the EEPROM, enable the ACPI Magic Packet filter 6762 */ 6763 if (adapter->flags & FLAG_APME_IN_WUC) { 6764 /* APME bit in EEPROM is mapped to WUC.APME */ 6765 eeprom_data = er32(WUC); 6766 eeprom_apme_mask = E1000_WUC_APME; 6767 if ((hw->mac.type > e1000_ich10lan) && 6768 (eeprom_data & E1000_WUC_PHY_WAKE)) 6769 adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP; 6770 } else if (adapter->flags & FLAG_APME_IN_CTRL3) { 6771 if (adapter->flags & FLAG_APME_CHECK_PORT_B && 6772 (adapter->hw.bus.func == 1)) 6773 e1000_read_nvm(&adapter->hw, NVM_INIT_CONTROL3_PORT_B, 6774 1, &eeprom_data); 6775 else 6776 e1000_read_nvm(&adapter->hw, NVM_INIT_CONTROL3_PORT_A, 6777 1, &eeprom_data); 6778 } 6779 6780 /* fetch WoL from EEPROM */ 6781 if (eeprom_data & eeprom_apme_mask) 6782 adapter->eeprom_wol |= E1000_WUFC_MAG; 6783 6784 /* now that we have the eeprom settings, apply the special cases 6785 * where the eeprom may be wrong or the board simply won't support 6786 * wake on lan on a particular port 6787 */ 6788 if (!(adapter->flags & FLAG_HAS_WOL)) 6789 adapter->eeprom_wol = 0; 6790 6791 /* initialize the wol settings based on the eeprom settings */ 6792 adapter->wol = adapter->eeprom_wol; 6793 6794 /* make sure adapter isn't asleep if manageability is enabled */ 6795 if (adapter->wol || (adapter->flags & FLAG_MNG_PT_ENABLED) || 6796 (hw->mac.ops.check_mng_mode(hw))) 6797 device_wakeup_enable(&pdev->dev); 6798 6799 /* save off EEPROM version number */ 6800 e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers); 6801 6802 /* reset the hardware with the new settings */ 6803 e1000e_reset(adapter); 6804 6805 /* If the controller has AMT, do not set DRV_LOAD until the interface 6806 * is up. For all other cases, let the f/w know that the h/w is now 6807 * under the control of the driver. 6808 */ 6809 if (!(adapter->flags & FLAG_HAS_AMT)) 6810 e1000e_get_hw_control(adapter); 6811 6812 strlcpy(netdev->name, "eth%d", sizeof(netdev->name)); 6813 err = register_netdev(netdev); 6814 if (err) 6815 goto err_register; 6816 6817 /* carrier off reporting is important to ethtool even BEFORE open */ 6818 netif_carrier_off(netdev); 6819 6820 /* init PTP hardware clock */ 6821 e1000e_ptp_init(adapter); 6822 6823 e1000_print_device_info(adapter); 6824 6825 if (pci_dev_run_wake(pdev)) 6826 pm_runtime_put_noidle(&pdev->dev); 6827 6828 return 0; 6829 6830 err_register: 6831 if (!(adapter->flags & FLAG_HAS_AMT)) 6832 e1000e_release_hw_control(adapter); 6833 err_eeprom: 6834 if (hw->phy.ops.check_reset_block && !hw->phy.ops.check_reset_block(hw)) 6835 e1000_phy_hw_reset(&adapter->hw); 6836 err_hw_init: 6837 kfree(adapter->tx_ring); 6838 kfree(adapter->rx_ring); 6839 err_sw_init: 6840 if (adapter->hw.flash_address) 6841 iounmap(adapter->hw.flash_address); 6842 e1000e_reset_interrupt_capability(adapter); 6843 err_flashmap: 6844 iounmap(adapter->hw.hw_addr); 6845 err_ioremap: 6846 free_netdev(netdev); 6847 err_alloc_etherdev: 6848 pci_release_selected_regions(pdev, 6849 pci_select_bars(pdev, IORESOURCE_MEM)); 6850 err_pci_reg: 6851 err_dma: 6852 pci_disable_device(pdev); 6853 return err; 6854 } 6855 6856 /** 6857 * e1000_remove - Device Removal Routine 6858 * @pdev: PCI device information struct 6859 * 6860 * e1000_remove is called by the PCI subsystem to alert the driver 6861 * that it should release a PCI device. The could be caused by a 6862 * Hot-Plug event, or because the driver is going to be removed from 6863 * memory. 6864 **/ 6865 static void e1000_remove(struct pci_dev *pdev) 6866 { 6867 struct net_device *netdev = pci_get_drvdata(pdev); 6868 struct e1000_adapter *adapter = netdev_priv(netdev); 6869 bool down = test_bit(__E1000_DOWN, &adapter->state); 6870 6871 e1000e_ptp_remove(adapter); 6872 6873 /* The timers may be rescheduled, so explicitly disable them 6874 * from being rescheduled. 6875 */ 6876 if (!down) 6877 set_bit(__E1000_DOWN, &adapter->state); 6878 del_timer_sync(&adapter->watchdog_timer); 6879 del_timer_sync(&adapter->phy_info_timer); 6880 6881 cancel_work_sync(&adapter->reset_task); 6882 cancel_work_sync(&adapter->watchdog_task); 6883 cancel_work_sync(&adapter->downshift_task); 6884 cancel_work_sync(&adapter->update_phy_task); 6885 cancel_work_sync(&adapter->print_hang_task); 6886 6887 if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) { 6888 cancel_work_sync(&adapter->tx_hwtstamp_work); 6889 if (adapter->tx_hwtstamp_skb) { 6890 dev_kfree_skb_any(adapter->tx_hwtstamp_skb); 6891 adapter->tx_hwtstamp_skb = NULL; 6892 } 6893 } 6894 6895 if (!(netdev->flags & IFF_UP)) 6896 e1000_power_down_phy(adapter); 6897 6898 /* Don't lie to e1000_close() down the road. */ 6899 if (!down) 6900 clear_bit(__E1000_DOWN, &adapter->state); 6901 unregister_netdev(netdev); 6902 6903 if (pci_dev_run_wake(pdev)) 6904 pm_runtime_get_noresume(&pdev->dev); 6905 6906 /* Release control of h/w to f/w. If f/w is AMT enabled, this 6907 * would have already happened in close and is redundant. 6908 */ 6909 e1000e_release_hw_control(adapter); 6910 6911 e1000e_reset_interrupt_capability(adapter); 6912 kfree(adapter->tx_ring); 6913 kfree(adapter->rx_ring); 6914 6915 iounmap(adapter->hw.hw_addr); 6916 if (adapter->hw.flash_address) 6917 iounmap(adapter->hw.flash_address); 6918 pci_release_selected_regions(pdev, 6919 pci_select_bars(pdev, IORESOURCE_MEM)); 6920 6921 free_netdev(netdev); 6922 6923 /* AER disable */ 6924 pci_disable_pcie_error_reporting(pdev); 6925 6926 pci_disable_device(pdev); 6927 } 6928 6929 /* PCI Error Recovery (ERS) */ 6930 static const struct pci_error_handlers e1000_err_handler = { 6931 .error_detected = e1000_io_error_detected, 6932 .slot_reset = e1000_io_slot_reset, 6933 .resume = e1000_io_resume, 6934 }; 6935 6936 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = { 6937 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 }, 6938 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 }, 6939 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 }, 6940 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), 6941 board_82571 }, 6942 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 }, 6943 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 }, 6944 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 }, 6945 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 }, 6946 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 }, 6947 6948 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 }, 6949 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 }, 6950 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 }, 6951 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 }, 6952 6953 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 }, 6954 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 }, 6955 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 }, 6956 6957 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 }, 6958 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 }, 6959 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 }, 6960 6961 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT), 6962 board_80003es2lan }, 6963 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT), 6964 board_80003es2lan }, 6965 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT), 6966 board_80003es2lan }, 6967 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT), 6968 board_80003es2lan }, 6969 6970 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan }, 6971 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan }, 6972 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan }, 6973 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan }, 6974 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan }, 6975 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan }, 6976 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan }, 6977 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan }, 6978 6979 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan }, 6980 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan }, 6981 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan }, 6982 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan }, 6983 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan }, 6984 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan }, 6985 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan }, 6986 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan }, 6987 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan }, 6988 6989 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan }, 6990 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan }, 6991 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan }, 6992 6993 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan }, 6994 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan }, 6995 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_V), board_ich10lan }, 6996 6997 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan }, 6998 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan }, 6999 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan }, 7000 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan }, 7001 7002 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_LM), board_pch2lan }, 7003 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_V), board_pch2lan }, 7004 7005 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_LM), board_pch_lpt }, 7006 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_V), board_pch_lpt }, 7007 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_LM), board_pch_lpt }, 7008 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_V), board_pch_lpt }, 7009 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_LM2), board_pch_lpt }, 7010 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_V2), board_pch_lpt }, 7011 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_LM3), board_pch_lpt }, 7012 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_V3), board_pch_lpt }, 7013 7014 { 0, 0, 0, 0, 0, 0, 0 } /* terminate list */ 7015 }; 7016 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl); 7017 7018 #ifdef CONFIG_PM 7019 static const struct dev_pm_ops e1000_pm_ops = { 7020 SET_SYSTEM_SLEEP_PM_OPS(e1000_suspend, e1000_resume) 7021 SET_RUNTIME_PM_OPS(e1000_runtime_suspend, e1000_runtime_resume, 7022 e1000_idle) 7023 }; 7024 #endif 7025 7026 /* PCI Device API Driver */ 7027 static struct pci_driver e1000_driver = { 7028 .name = e1000e_driver_name, 7029 .id_table = e1000_pci_tbl, 7030 .probe = e1000_probe, 7031 .remove = e1000_remove, 7032 #ifdef CONFIG_PM 7033 .driver = { 7034 .pm = &e1000_pm_ops, 7035 }, 7036 #endif 7037 .shutdown = e1000_shutdown, 7038 .err_handler = &e1000_err_handler 7039 }; 7040 7041 /** 7042 * e1000_init_module - Driver Registration Routine 7043 * 7044 * e1000_init_module is the first routine called when the driver is 7045 * loaded. All it does is register with the PCI subsystem. 7046 **/ 7047 static int __init e1000_init_module(void) 7048 { 7049 int ret; 7050 pr_info("Intel(R) PRO/1000 Network Driver - %s\n", 7051 e1000e_driver_version); 7052 pr_info("Copyright(c) 1999 - 2013 Intel Corporation.\n"); 7053 ret = pci_register_driver(&e1000_driver); 7054 7055 return ret; 7056 } 7057 module_init(e1000_init_module); 7058 7059 /** 7060 * e1000_exit_module - Driver Exit Cleanup Routine 7061 * 7062 * e1000_exit_module is called just before the driver is removed 7063 * from memory. 7064 **/ 7065 static void __exit e1000_exit_module(void) 7066 { 7067 pci_unregister_driver(&e1000_driver); 7068 } 7069 module_exit(e1000_exit_module); 7070 7071 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); 7072 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver"); 7073 MODULE_LICENSE("GPL"); 7074 MODULE_VERSION(DRV_VERSION); 7075 7076 /* netdev.c */ 7077