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