1 /*******************************************************************************
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2013 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/init.h>
34 #include <linux/pci.h>
35 #include <linux/vmalloc.h>
36 #include <linux/pagemap.h>
37 #include <linux/delay.h>
38 #include <linux/netdevice.h>
39 #include <linux/interrupt.h>
40 #include <linux/tcp.h>
41 #include <linux/ipv6.h>
42 #include <linux/slab.h>
43 #include <net/checksum.h>
44 #include <net/ip6_checksum.h>
45 #include <linux/ethtool.h>
46 #include <linux/if_vlan.h>
47 #include <linux/cpu.h>
48 #include <linux/smp.h>
49 #include <linux/pm_qos.h>
50 #include <linux/pm_runtime.h>
51 #include <linux/aer.h>
52 #include <linux/prefetch.h>
56 #define DRV_EXTRAVERSION "-k"
58 #define DRV_VERSION "2.2.14" DRV_EXTRAVERSION
59 char e1000e_driver_name[] = "e1000e";
60 const char e1000e_driver_version[] = DRV_VERSION;
62 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
63 static int debug = -1;
64 module_param(debug, int, 0);
65 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
67 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state);
69 static const struct e1000_info *e1000_info_tbl[] = {
70 [board_82571] = &e1000_82571_info,
71 [board_82572] = &e1000_82572_info,
72 [board_82573] = &e1000_82573_info,
73 [board_82574] = &e1000_82574_info,
74 [board_82583] = &e1000_82583_info,
75 [board_80003es2lan] = &e1000_es2_info,
76 [board_ich8lan] = &e1000_ich8_info,
77 [board_ich9lan] = &e1000_ich9_info,
78 [board_ich10lan] = &e1000_ich10_info,
79 [board_pchlan] = &e1000_pch_info,
80 [board_pch2lan] = &e1000_pch2_info,
81 [board_pch_lpt] = &e1000_pch_lpt_info,
84 struct e1000_reg_info {
89 static const struct e1000_reg_info e1000_reg_info_tbl[] = {
90 /* General Registers */
92 {E1000_STATUS, "STATUS"},
93 {E1000_CTRL_EXT, "CTRL_EXT"},
95 /* Interrupt Registers */
100 {E1000_RDLEN(0), "RDLEN"},
101 {E1000_RDH(0), "RDH"},
102 {E1000_RDT(0), "RDT"},
103 {E1000_RDTR, "RDTR"},
104 {E1000_RXDCTL(0), "RXDCTL"},
106 {E1000_RDBAL(0), "RDBAL"},
107 {E1000_RDBAH(0), "RDBAH"},
108 {E1000_RDFH, "RDFH"},
109 {E1000_RDFT, "RDFT"},
110 {E1000_RDFHS, "RDFHS"},
111 {E1000_RDFTS, "RDFTS"},
112 {E1000_RDFPC, "RDFPC"},
115 {E1000_TCTL, "TCTL"},
116 {E1000_TDBAL(0), "TDBAL"},
117 {E1000_TDBAH(0), "TDBAH"},
118 {E1000_TDLEN(0), "TDLEN"},
119 {E1000_TDH(0), "TDH"},
120 {E1000_TDT(0), "TDT"},
121 {E1000_TIDV, "TIDV"},
122 {E1000_TXDCTL(0), "TXDCTL"},
123 {E1000_TADV, "TADV"},
124 {E1000_TARC(0), "TARC"},
125 {E1000_TDFH, "TDFH"},
126 {E1000_TDFT, "TDFT"},
127 {E1000_TDFHS, "TDFHS"},
128 {E1000_TDFTS, "TDFTS"},
129 {E1000_TDFPC, "TDFPC"},
131 /* List Terminator */
136 * e1000_regdump - register printout routine
137 * @hw: pointer to the HW structure
138 * @reginfo: pointer to the register info table
140 static void e1000_regdump(struct e1000_hw *hw, struct e1000_reg_info *reginfo)
146 switch (reginfo->ofs) {
147 case E1000_RXDCTL(0):
148 for (n = 0; n < 2; n++)
149 regs[n] = __er32(hw, E1000_RXDCTL(n));
151 case E1000_TXDCTL(0):
152 for (n = 0; n < 2; n++)
153 regs[n] = __er32(hw, E1000_TXDCTL(n));
156 for (n = 0; n < 2; n++)
157 regs[n] = __er32(hw, E1000_TARC(n));
160 pr_info("%-15s %08x\n",
161 reginfo->name, __er32(hw, reginfo->ofs));
165 snprintf(rname, 16, "%s%s", reginfo->name, "[0-1]");
166 pr_info("%-15s %08x %08x\n", rname, regs[0], regs[1]);
169 static void e1000e_dump_ps_pages(struct e1000_adapter *adapter,
170 struct e1000_buffer *bi)
173 struct e1000_ps_page *ps_page;
175 for (i = 0; i < adapter->rx_ps_pages; i++) {
176 ps_page = &bi->ps_pages[i];
179 pr_info("packet dump for ps_page %d:\n", i);
180 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
181 16, 1, page_address(ps_page->page),
188 * e1000e_dump - Print registers, Tx-ring and Rx-ring
189 * @adapter: board private structure
191 static void e1000e_dump(struct e1000_adapter *adapter)
193 struct net_device *netdev = adapter->netdev;
194 struct e1000_hw *hw = &adapter->hw;
195 struct e1000_reg_info *reginfo;
196 struct e1000_ring *tx_ring = adapter->tx_ring;
197 struct e1000_tx_desc *tx_desc;
202 struct e1000_buffer *buffer_info;
203 struct e1000_ring *rx_ring = adapter->rx_ring;
204 union e1000_rx_desc_packet_split *rx_desc_ps;
205 union e1000_rx_desc_extended *rx_desc;
215 if (!netif_msg_hw(adapter))
218 /* Print netdevice Info */
220 dev_info(&adapter->pdev->dev, "Net device Info\n");
221 pr_info("Device Name state trans_start last_rx\n");
222 pr_info("%-15s %016lX %016lX %016lX\n",
223 netdev->name, netdev->state, netdev->trans_start,
227 /* Print Registers */
228 dev_info(&adapter->pdev->dev, "Register Dump\n");
229 pr_info(" Register Name Value\n");
230 for (reginfo = (struct e1000_reg_info *)e1000_reg_info_tbl;
231 reginfo->name; reginfo++) {
232 e1000_regdump(hw, reginfo);
235 /* Print Tx Ring Summary */
236 if (!netdev || !netif_running(netdev))
239 dev_info(&adapter->pdev->dev, "Tx Ring Summary\n");
240 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n");
241 buffer_info = &tx_ring->buffer_info[tx_ring->next_to_clean];
242 pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n",
243 0, tx_ring->next_to_use, tx_ring->next_to_clean,
244 (unsigned long long)buffer_info->dma,
246 buffer_info->next_to_watch,
247 (unsigned long long)buffer_info->time_stamp);
250 if (!netif_msg_tx_done(adapter))
251 goto rx_ring_summary;
253 dev_info(&adapter->pdev->dev, "Tx Ring Dump\n");
255 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
257 * Legacy Transmit Descriptor
258 * +--------------------------------------------------------------+
259 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
260 * +--------------------------------------------------------------+
261 * 8 | Special | CSS | Status | CMD | CSO | Length |
262 * +--------------------------------------------------------------+
263 * 63 48 47 36 35 32 31 24 23 16 15 0
265 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
266 * 63 48 47 40 39 32 31 16 15 8 7 0
267 * +----------------------------------------------------------------+
268 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
269 * +----------------------------------------------------------------+
270 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
271 * +----------------------------------------------------------------+
272 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
274 * Extended Data Descriptor (DTYP=0x1)
275 * +----------------------------------------------------------------+
276 * 0 | Buffer Address [63:0] |
277 * +----------------------------------------------------------------+
278 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
279 * +----------------------------------------------------------------+
280 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
282 pr_info("Tl[desc] [address 63:0 ] [SpeCssSCmCsLen] [bi->dma ] leng ntw timestamp bi->skb <-- Legacy format\n");
283 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Context format\n");
284 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Data format\n");
285 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
286 const char *next_desc;
287 tx_desc = E1000_TX_DESC(*tx_ring, i);
288 buffer_info = &tx_ring->buffer_info[i];
289 u0 = (struct my_u0 *)tx_desc;
290 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
291 next_desc = " NTC/U";
292 else if (i == tx_ring->next_to_use)
294 else if (i == tx_ring->next_to_clean)
298 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p%s\n",
299 (!(le64_to_cpu(u0->b) & (1 << 29)) ? 'l' :
300 ((le64_to_cpu(u0->b) & (1 << 20)) ? 'd' : 'c')),
302 (unsigned long long)le64_to_cpu(u0->a),
303 (unsigned long long)le64_to_cpu(u0->b),
304 (unsigned long long)buffer_info->dma,
305 buffer_info->length, buffer_info->next_to_watch,
306 (unsigned long long)buffer_info->time_stamp,
307 buffer_info->skb, next_desc);
309 if (netif_msg_pktdata(adapter) && buffer_info->skb)
310 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
311 16, 1, buffer_info->skb->data,
312 buffer_info->skb->len, true);
315 /* Print Rx Ring Summary */
317 dev_info(&adapter->pdev->dev, "Rx Ring Summary\n");
318 pr_info("Queue [NTU] [NTC]\n");
319 pr_info(" %5d %5X %5X\n",
320 0, rx_ring->next_to_use, rx_ring->next_to_clean);
323 if (!netif_msg_rx_status(adapter))
326 dev_info(&adapter->pdev->dev, "Rx Ring Dump\n");
327 switch (adapter->rx_ps_pages) {
331 /* [Extended] Packet Split Receive Descriptor Format
333 * +-----------------------------------------------------+
334 * 0 | Buffer Address 0 [63:0] |
335 * +-----------------------------------------------------+
336 * 8 | Buffer Address 1 [63:0] |
337 * +-----------------------------------------------------+
338 * 16 | Buffer Address 2 [63:0] |
339 * +-----------------------------------------------------+
340 * 24 | Buffer Address 3 [63:0] |
341 * +-----------------------------------------------------+
343 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");
344 /* [Extended] Receive Descriptor (Write-Back) Format
346 * 63 48 47 32 31 13 12 8 7 4 3 0
347 * +------------------------------------------------------+
348 * 0 | Packet | IP | Rsvd | MRQ | Rsvd | MRQ RSS |
349 * | Checksum | Ident | | Queue | | Type |
350 * +------------------------------------------------------+
351 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
352 * +------------------------------------------------------+
353 * 63 48 47 32 31 20 19 0
355 pr_info("RWB[desc] [ck ipid mrqhsh] [vl l0 ee es] [ l3 l2 l1 hs] [reserved ] ---------------- [bi->skb] <-- Ext Rx Write-Back format\n");
356 for (i = 0; i < rx_ring->count; i++) {
357 const char *next_desc;
358 buffer_info = &rx_ring->buffer_info[i];
359 rx_desc_ps = E1000_RX_DESC_PS(*rx_ring, i);
360 u1 = (struct my_u1 *)rx_desc_ps;
362 le32_to_cpu(rx_desc_ps->wb.middle.status_error);
364 if (i == rx_ring->next_to_use)
366 else if (i == rx_ring->next_to_clean)
371 if (staterr & E1000_RXD_STAT_DD) {
372 /* Descriptor Done */
373 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX ---------------- %p%s\n",
375 (unsigned long long)le64_to_cpu(u1->a),
376 (unsigned long long)le64_to_cpu(u1->b),
377 (unsigned long long)le64_to_cpu(u1->c),
378 (unsigned long long)le64_to_cpu(u1->d),
379 buffer_info->skb, next_desc);
381 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX %016llX %p%s\n",
383 (unsigned long long)le64_to_cpu(u1->a),
384 (unsigned long long)le64_to_cpu(u1->b),
385 (unsigned long long)le64_to_cpu(u1->c),
386 (unsigned long long)le64_to_cpu(u1->d),
387 (unsigned long long)buffer_info->dma,
388 buffer_info->skb, next_desc);
390 if (netif_msg_pktdata(adapter))
391 e1000e_dump_ps_pages(adapter,
398 /* Extended Receive Descriptor (Read) Format
400 * +-----------------------------------------------------+
401 * 0 | Buffer Address [63:0] |
402 * +-----------------------------------------------------+
404 * +-----------------------------------------------------+
406 pr_info("R [desc] [buf addr 63:0 ] [reserved 63:0 ] [bi->dma ] [bi->skb] <-- Ext (Read) format\n");
407 /* Extended Receive Descriptor (Write-Back) Format
409 * 63 48 47 32 31 24 23 4 3 0
410 * +------------------------------------------------------+
412 * 0 +-------------------+ Rsvd | Reserved | MRQ RSS |
413 * | Packet | IP | | | Type |
414 * | Checksum | Ident | | | |
415 * +------------------------------------------------------+
416 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
417 * +------------------------------------------------------+
418 * 63 48 47 32 31 20 19 0
420 pr_info("RWB[desc] [cs ipid mrq] [vt ln xe xs] [bi->skb] <-- Ext (Write-Back) format\n");
422 for (i = 0; i < rx_ring->count; i++) {
423 const char *next_desc;
425 buffer_info = &rx_ring->buffer_info[i];
426 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
427 u1 = (struct my_u1 *)rx_desc;
428 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
430 if (i == rx_ring->next_to_use)
432 else if (i == rx_ring->next_to_clean)
437 if (staterr & E1000_RXD_STAT_DD) {
438 /* Descriptor Done */
439 pr_info("%s[0x%03X] %016llX %016llX ---------------- %p%s\n",
441 (unsigned long long)le64_to_cpu(u1->a),
442 (unsigned long long)le64_to_cpu(u1->b),
443 buffer_info->skb, next_desc);
445 pr_info("%s[0x%03X] %016llX %016llX %016llX %p%s\n",
447 (unsigned long long)le64_to_cpu(u1->a),
448 (unsigned long long)le64_to_cpu(u1->b),
449 (unsigned long long)buffer_info->dma,
450 buffer_info->skb, next_desc);
452 if (netif_msg_pktdata(adapter) &&
454 print_hex_dump(KERN_INFO, "",
455 DUMP_PREFIX_ADDRESS, 16,
457 buffer_info->skb->data,
458 adapter->rx_buffer_len,
466 * e1000_desc_unused - calculate if we have unused descriptors
468 static int e1000_desc_unused(struct e1000_ring *ring)
470 if (ring->next_to_clean > ring->next_to_use)
471 return ring->next_to_clean - ring->next_to_use - 1;
473 return ring->count + ring->next_to_clean - ring->next_to_use - 1;
477 * e1000e_systim_to_hwtstamp - convert system time value to hw time stamp
478 * @adapter: board private structure
479 * @hwtstamps: time stamp structure to update
480 * @systim: unsigned 64bit system time value.
482 * Convert the system time value stored in the RX/TXSTMP registers into a
483 * hwtstamp which can be used by the upper level time stamping functions.
485 * The 'systim_lock' spinlock is used to protect the consistency of the
486 * system time value. This is needed because reading the 64 bit time
487 * value involves reading two 32 bit registers. The first read latches the
490 static void e1000e_systim_to_hwtstamp(struct e1000_adapter *adapter,
491 struct skb_shared_hwtstamps *hwtstamps,
497 spin_lock_irqsave(&adapter->systim_lock, flags);
498 ns = timecounter_cyc2time(&adapter->tc, systim);
499 spin_unlock_irqrestore(&adapter->systim_lock, flags);
501 memset(hwtstamps, 0, sizeof(*hwtstamps));
502 hwtstamps->hwtstamp = ns_to_ktime(ns);
506 * e1000e_rx_hwtstamp - utility function which checks for Rx time stamp
507 * @adapter: board private structure
508 * @status: descriptor extended error and status field
509 * @skb: particular skb to include time stamp
511 * If the time stamp is valid, convert it into the timecounter ns value
512 * and store that result into the shhwtstamps structure which is passed
513 * up the network stack.
515 static void e1000e_rx_hwtstamp(struct e1000_adapter *adapter, u32 status,
518 struct e1000_hw *hw = &adapter->hw;
521 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP) ||
522 !(status & E1000_RXDEXT_STATERR_TST) ||
523 !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID))
526 /* The Rx time stamp registers contain the time stamp. No other
527 * received packet will be time stamped until the Rx time stamp
528 * registers are read. Because only one packet can be time stamped
529 * at a time, the register values must belong to this packet and
530 * therefore none of the other additional attributes need to be
533 rxstmp = (u64)er32(RXSTMPL);
534 rxstmp |= (u64)er32(RXSTMPH) << 32;
535 e1000e_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), rxstmp);
537 adapter->flags2 &= ~FLAG2_CHECK_RX_HWTSTAMP;
541 * e1000_receive_skb - helper function to handle Rx indications
542 * @adapter: board private structure
543 * @staterr: descriptor extended error and status field as written by hardware
544 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
545 * @skb: pointer to sk_buff to be indicated to stack
547 static void e1000_receive_skb(struct e1000_adapter *adapter,
548 struct net_device *netdev, struct sk_buff *skb,
549 u32 staterr, __le16 vlan)
551 u16 tag = le16_to_cpu(vlan);
553 e1000e_rx_hwtstamp(adapter, staterr, skb);
555 skb->protocol = eth_type_trans(skb, netdev);
557 if (staterr & E1000_RXD_STAT_VP)
558 __vlan_hwaccel_put_tag(skb, tag);
560 napi_gro_receive(&adapter->napi, skb);
564 * e1000_rx_checksum - Receive Checksum Offload
565 * @adapter: board private structure
566 * @status_err: receive descriptor status and error fields
567 * @csum: receive descriptor csum field
568 * @sk_buff: socket buffer with received data
570 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
573 u16 status = (u16)status_err;
574 u8 errors = (u8)(status_err >> 24);
576 skb_checksum_none_assert(skb);
578 /* Rx checksum disabled */
579 if (!(adapter->netdev->features & NETIF_F_RXCSUM))
582 /* Ignore Checksum bit is set */
583 if (status & E1000_RXD_STAT_IXSM)
586 /* TCP/UDP checksum error bit or IP checksum error bit is set */
587 if (errors & (E1000_RXD_ERR_TCPE | E1000_RXD_ERR_IPE)) {
588 /* let the stack verify checksum errors */
589 adapter->hw_csum_err++;
593 /* TCP/UDP Checksum has not been calculated */
594 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
597 /* It must be a TCP or UDP packet with a valid checksum */
598 skb->ip_summed = CHECKSUM_UNNECESSARY;
599 adapter->hw_csum_good++;
602 static void e1000e_update_rdt_wa(struct e1000_ring *rx_ring, unsigned int i)
604 struct e1000_adapter *adapter = rx_ring->adapter;
605 struct e1000_hw *hw = &adapter->hw;
606 s32 ret_val = __ew32_prepare(hw);
608 writel(i, rx_ring->tail);
610 if (unlikely(!ret_val && (i != readl(rx_ring->tail)))) {
611 u32 rctl = er32(RCTL);
612 ew32(RCTL, rctl & ~E1000_RCTL_EN);
613 e_err("ME firmware caused invalid RDT - resetting\n");
614 schedule_work(&adapter->reset_task);
618 static void e1000e_update_tdt_wa(struct e1000_ring *tx_ring, unsigned int i)
620 struct e1000_adapter *adapter = tx_ring->adapter;
621 struct e1000_hw *hw = &adapter->hw;
622 s32 ret_val = __ew32_prepare(hw);
624 writel(i, tx_ring->tail);
626 if (unlikely(!ret_val && (i != readl(tx_ring->tail)))) {
627 u32 tctl = er32(TCTL);
628 ew32(TCTL, tctl & ~E1000_TCTL_EN);
629 e_err("ME firmware caused invalid TDT - resetting\n");
630 schedule_work(&adapter->reset_task);
635 * e1000_alloc_rx_buffers - Replace used receive buffers
636 * @rx_ring: Rx descriptor ring
638 static void e1000_alloc_rx_buffers(struct e1000_ring *rx_ring,
639 int cleaned_count, gfp_t gfp)
641 struct e1000_adapter *adapter = rx_ring->adapter;
642 struct net_device *netdev = adapter->netdev;
643 struct pci_dev *pdev = adapter->pdev;
644 union e1000_rx_desc_extended *rx_desc;
645 struct e1000_buffer *buffer_info;
648 unsigned int bufsz = adapter->rx_buffer_len;
650 i = rx_ring->next_to_use;
651 buffer_info = &rx_ring->buffer_info[i];
653 while (cleaned_count--) {
654 skb = buffer_info->skb;
660 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
662 /* Better luck next round */
663 adapter->alloc_rx_buff_failed++;
667 buffer_info->skb = skb;
669 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
670 adapter->rx_buffer_len,
672 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
673 dev_err(&pdev->dev, "Rx DMA map failed\n");
674 adapter->rx_dma_failed++;
678 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
679 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
681 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
682 /* Force memory writes to complete before letting h/w
683 * know there are new descriptors to fetch. (Only
684 * applicable for weak-ordered memory model archs,
688 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
689 e1000e_update_rdt_wa(rx_ring, i);
691 writel(i, rx_ring->tail);
694 if (i == rx_ring->count)
696 buffer_info = &rx_ring->buffer_info[i];
699 rx_ring->next_to_use = i;
703 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
704 * @rx_ring: Rx descriptor ring
706 static void e1000_alloc_rx_buffers_ps(struct e1000_ring *rx_ring,
707 int cleaned_count, gfp_t gfp)
709 struct e1000_adapter *adapter = rx_ring->adapter;
710 struct net_device *netdev = adapter->netdev;
711 struct pci_dev *pdev = adapter->pdev;
712 union e1000_rx_desc_packet_split *rx_desc;
713 struct e1000_buffer *buffer_info;
714 struct e1000_ps_page *ps_page;
718 i = rx_ring->next_to_use;
719 buffer_info = &rx_ring->buffer_info[i];
721 while (cleaned_count--) {
722 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
724 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
725 ps_page = &buffer_info->ps_pages[j];
726 if (j >= adapter->rx_ps_pages) {
727 /* all unused desc entries get hw null ptr */
728 rx_desc->read.buffer_addr[j + 1] =
732 if (!ps_page->page) {
733 ps_page->page = alloc_page(gfp);
734 if (!ps_page->page) {
735 adapter->alloc_rx_buff_failed++;
738 ps_page->dma = dma_map_page(&pdev->dev,
742 if (dma_mapping_error(&pdev->dev,
744 dev_err(&adapter->pdev->dev,
745 "Rx DMA page map failed\n");
746 adapter->rx_dma_failed++;
750 /* Refresh the desc even if buffer_addrs
751 * didn't change because each write-back
754 rx_desc->read.buffer_addr[j + 1] =
755 cpu_to_le64(ps_page->dma);
758 skb = __netdev_alloc_skb_ip_align(netdev,
759 adapter->rx_ps_bsize0,
763 adapter->alloc_rx_buff_failed++;
767 buffer_info->skb = skb;
768 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
769 adapter->rx_ps_bsize0,
771 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
772 dev_err(&pdev->dev, "Rx DMA map failed\n");
773 adapter->rx_dma_failed++;
775 dev_kfree_skb_any(skb);
776 buffer_info->skb = NULL;
780 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
782 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
783 /* Force memory writes to complete before letting h/w
784 * know there are new descriptors to fetch. (Only
785 * applicable for weak-ordered memory model archs,
789 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
790 e1000e_update_rdt_wa(rx_ring, i << 1);
792 writel(i << 1, rx_ring->tail);
796 if (i == rx_ring->count)
798 buffer_info = &rx_ring->buffer_info[i];
802 rx_ring->next_to_use = i;
806 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
807 * @rx_ring: Rx descriptor ring
808 * @cleaned_count: number of buffers to allocate this pass
811 static void e1000_alloc_jumbo_rx_buffers(struct e1000_ring *rx_ring,
812 int cleaned_count, gfp_t gfp)
814 struct e1000_adapter *adapter = rx_ring->adapter;
815 struct net_device *netdev = adapter->netdev;
816 struct pci_dev *pdev = adapter->pdev;
817 union e1000_rx_desc_extended *rx_desc;
818 struct e1000_buffer *buffer_info;
821 unsigned int bufsz = 256 - 16; /* for skb_reserve */
823 i = rx_ring->next_to_use;
824 buffer_info = &rx_ring->buffer_info[i];
826 while (cleaned_count--) {
827 skb = buffer_info->skb;
833 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
834 if (unlikely(!skb)) {
835 /* Better luck next round */
836 adapter->alloc_rx_buff_failed++;
840 buffer_info->skb = skb;
842 /* allocate a new page if necessary */
843 if (!buffer_info->page) {
844 buffer_info->page = alloc_page(gfp);
845 if (unlikely(!buffer_info->page)) {
846 adapter->alloc_rx_buff_failed++;
851 if (!buffer_info->dma)
852 buffer_info->dma = dma_map_page(&pdev->dev,
853 buffer_info->page, 0,
857 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
858 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
860 if (unlikely(++i == rx_ring->count))
862 buffer_info = &rx_ring->buffer_info[i];
865 if (likely(rx_ring->next_to_use != i)) {
866 rx_ring->next_to_use = i;
867 if (unlikely(i-- == 0))
868 i = (rx_ring->count - 1);
870 /* Force memory writes to complete before letting h/w
871 * know there are new descriptors to fetch. (Only
872 * applicable for weak-ordered memory model archs,
876 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
877 e1000e_update_rdt_wa(rx_ring, i);
879 writel(i, rx_ring->tail);
883 static inline void e1000_rx_hash(struct net_device *netdev, __le32 rss,
886 if (netdev->features & NETIF_F_RXHASH)
887 skb->rxhash = le32_to_cpu(rss);
891 * e1000_clean_rx_irq - Send received data up the network stack
892 * @rx_ring: Rx descriptor ring
894 * the return value indicates whether actual cleaning was done, there
895 * is no guarantee that everything was cleaned
897 static bool e1000_clean_rx_irq(struct e1000_ring *rx_ring, int *work_done,
900 struct e1000_adapter *adapter = rx_ring->adapter;
901 struct net_device *netdev = adapter->netdev;
902 struct pci_dev *pdev = adapter->pdev;
903 struct e1000_hw *hw = &adapter->hw;
904 union e1000_rx_desc_extended *rx_desc, *next_rxd;
905 struct e1000_buffer *buffer_info, *next_buffer;
908 int cleaned_count = 0;
909 bool cleaned = false;
910 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
912 i = rx_ring->next_to_clean;
913 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
914 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
915 buffer_info = &rx_ring->buffer_info[i];
917 while (staterr & E1000_RXD_STAT_DD) {
920 if (*work_done >= work_to_do)
923 rmb(); /* read descriptor and rx_buffer_info after status DD */
925 skb = buffer_info->skb;
926 buffer_info->skb = NULL;
928 prefetch(skb->data - NET_IP_ALIGN);
931 if (i == rx_ring->count)
933 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
936 next_buffer = &rx_ring->buffer_info[i];
940 dma_unmap_single(&pdev->dev,
942 adapter->rx_buffer_len,
944 buffer_info->dma = 0;
946 length = le16_to_cpu(rx_desc->wb.upper.length);
948 /* !EOP means multiple descriptors were used to store a single
949 * packet, if that's the case we need to toss it. In fact, we
950 * need to toss every packet with the EOP bit clear and the
951 * next frame that _does_ have the EOP bit set, as it is by
952 * definition only a frame fragment
954 if (unlikely(!(staterr & E1000_RXD_STAT_EOP)))
955 adapter->flags2 |= FLAG2_IS_DISCARDING;
957 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
958 /* All receives must fit into a single buffer */
959 e_dbg("Receive packet consumed multiple buffers\n");
961 buffer_info->skb = skb;
962 if (staterr & E1000_RXD_STAT_EOP)
963 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
967 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
968 !(netdev->features & NETIF_F_RXALL))) {
970 buffer_info->skb = skb;
974 /* adjust length to remove Ethernet CRC */
975 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
976 /* If configured to store CRC, don't subtract FCS,
977 * but keep the FCS bytes out of the total_rx_bytes
980 if (netdev->features & NETIF_F_RXFCS)
986 total_rx_bytes += length;
989 /* code added for copybreak, this should improve
990 * performance for small packets with large amounts
991 * of reassembly being done in the stack
993 if (length < copybreak) {
994 struct sk_buff *new_skb =
995 netdev_alloc_skb_ip_align(netdev, length);
997 skb_copy_to_linear_data_offset(new_skb,
1003 /* save the skb in buffer_info as good */
1004 buffer_info->skb = skb;
1007 /* else just continue with the old one */
1009 /* end copybreak code */
1010 skb_put(skb, length);
1012 /* Receive Checksum Offload */
1013 e1000_rx_checksum(adapter, staterr, skb);
1015 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1017 e1000_receive_skb(adapter, netdev, skb, staterr,
1018 rx_desc->wb.upper.vlan);
1021 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
1023 /* return some buffers to hardware, one at a time is too slow */
1024 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
1025 adapter->alloc_rx_buf(rx_ring, cleaned_count,
1030 /* use prefetched values */
1032 buffer_info = next_buffer;
1034 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1036 rx_ring->next_to_clean = i;
1038 cleaned_count = e1000_desc_unused(rx_ring);
1040 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
1042 adapter->total_rx_bytes += total_rx_bytes;
1043 adapter->total_rx_packets += total_rx_packets;
1047 static void e1000_put_txbuf(struct e1000_ring *tx_ring,
1048 struct e1000_buffer *buffer_info)
1050 struct e1000_adapter *adapter = tx_ring->adapter;
1052 if (buffer_info->dma) {
1053 if (buffer_info->mapped_as_page)
1054 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1055 buffer_info->length, DMA_TO_DEVICE);
1057 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1058 buffer_info->length, DMA_TO_DEVICE);
1059 buffer_info->dma = 0;
1061 if (buffer_info->skb) {
1062 dev_kfree_skb_any(buffer_info->skb);
1063 buffer_info->skb = NULL;
1065 buffer_info->time_stamp = 0;
1068 static void e1000_print_hw_hang(struct work_struct *work)
1070 struct e1000_adapter *adapter = container_of(work,
1071 struct e1000_adapter,
1073 struct net_device *netdev = adapter->netdev;
1074 struct e1000_ring *tx_ring = adapter->tx_ring;
1075 unsigned int i = tx_ring->next_to_clean;
1076 unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
1077 struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
1078 struct e1000_hw *hw = &adapter->hw;
1079 u16 phy_status, phy_1000t_status, phy_ext_status;
1082 if (test_bit(__E1000_DOWN, &adapter->state))
1085 if (!adapter->tx_hang_recheck &&
1086 (adapter->flags2 & FLAG2_DMA_BURST)) {
1087 /* May be block on write-back, flush and detect again
1088 * flush pending descriptor writebacks to memory
1090 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
1091 /* execute the writes immediately */
1093 /* Due to rare timing issues, write to TIDV again to ensure
1094 * the write is successful
1096 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
1097 /* execute the writes immediately */
1099 adapter->tx_hang_recheck = true;
1102 /* Real hang detected */
1103 adapter->tx_hang_recheck = false;
1104 netif_stop_queue(netdev);
1106 e1e_rphy(hw, MII_BMSR, &phy_status);
1107 e1e_rphy(hw, MII_STAT1000, &phy_1000t_status);
1108 e1e_rphy(hw, MII_ESTATUS, &phy_ext_status);
1110 pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status);
1112 /* detected Hardware unit hang */
1113 e_err("Detected Hardware Unit Hang:\n"
1116 " next_to_use <%x>\n"
1117 " next_to_clean <%x>\n"
1118 "buffer_info[next_to_clean]:\n"
1119 " time_stamp <%lx>\n"
1120 " next_to_watch <%x>\n"
1122 " next_to_watch.status <%x>\n"
1125 "PHY 1000BASE-T Status <%x>\n"
1126 "PHY Extended Status <%x>\n"
1127 "PCI Status <%x>\n",
1128 readl(tx_ring->head),
1129 readl(tx_ring->tail),
1130 tx_ring->next_to_use,
1131 tx_ring->next_to_clean,
1132 tx_ring->buffer_info[eop].time_stamp,
1135 eop_desc->upper.fields.status,
1142 /* Suggest workaround for known h/w issue */
1143 if ((hw->mac.type == e1000_pchlan) && (er32(CTRL) & E1000_CTRL_TFCE))
1144 e_err("Try turning off Tx pause (flow control) via ethtool\n");
1148 * e1000e_tx_hwtstamp_work - check for Tx time stamp
1149 * @work: pointer to work struct
1151 * This work function polls the TSYNCTXCTL valid bit to determine when a
1152 * timestamp has been taken for the current stored skb. The timestamp must
1153 * be for this skb because only one such packet is allowed in the queue.
1155 static void e1000e_tx_hwtstamp_work(struct work_struct *work)
1157 struct e1000_adapter *adapter = container_of(work, struct e1000_adapter,
1159 struct e1000_hw *hw = &adapter->hw;
1161 if (!adapter->tx_hwtstamp_skb)
1164 if (er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_VALID) {
1165 struct skb_shared_hwtstamps shhwtstamps;
1168 txstmp = er32(TXSTMPL);
1169 txstmp |= (u64)er32(TXSTMPH) << 32;
1171 e1000e_systim_to_hwtstamp(adapter, &shhwtstamps, txstmp);
1173 skb_tstamp_tx(adapter->tx_hwtstamp_skb, &shhwtstamps);
1174 dev_kfree_skb_any(adapter->tx_hwtstamp_skb);
1175 adapter->tx_hwtstamp_skb = NULL;
1177 /* reschedule to check later */
1178 schedule_work(&adapter->tx_hwtstamp_work);
1183 * e1000_clean_tx_irq - Reclaim resources after transmit completes
1184 * @tx_ring: Tx descriptor ring
1186 * the return value indicates whether actual cleaning was done, there
1187 * is no guarantee that everything was cleaned
1189 static bool e1000_clean_tx_irq(struct e1000_ring *tx_ring)
1191 struct e1000_adapter *adapter = tx_ring->adapter;
1192 struct net_device *netdev = adapter->netdev;
1193 struct e1000_hw *hw = &adapter->hw;
1194 struct e1000_tx_desc *tx_desc, *eop_desc;
1195 struct e1000_buffer *buffer_info;
1196 unsigned int i, eop;
1197 unsigned int count = 0;
1198 unsigned int total_tx_bytes = 0, total_tx_packets = 0;
1199 unsigned int bytes_compl = 0, pkts_compl = 0;
1201 i = tx_ring->next_to_clean;
1202 eop = tx_ring->buffer_info[i].next_to_watch;
1203 eop_desc = E1000_TX_DESC(*tx_ring, eop);
1205 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
1206 (count < tx_ring->count)) {
1207 bool cleaned = false;
1208 rmb(); /* read buffer_info after eop_desc */
1209 for (; !cleaned; count++) {
1210 tx_desc = E1000_TX_DESC(*tx_ring, i);
1211 buffer_info = &tx_ring->buffer_info[i];
1212 cleaned = (i == eop);
1215 total_tx_packets += buffer_info->segs;
1216 total_tx_bytes += buffer_info->bytecount;
1217 if (buffer_info->skb) {
1218 bytes_compl += buffer_info->skb->len;
1223 e1000_put_txbuf(tx_ring, buffer_info);
1224 tx_desc->upper.data = 0;
1227 if (i == tx_ring->count)
1231 if (i == tx_ring->next_to_use)
1233 eop = tx_ring->buffer_info[i].next_to_watch;
1234 eop_desc = E1000_TX_DESC(*tx_ring, eop);
1237 tx_ring->next_to_clean = i;
1239 netdev_completed_queue(netdev, pkts_compl, bytes_compl);
1241 #define TX_WAKE_THRESHOLD 32
1242 if (count && netif_carrier_ok(netdev) &&
1243 e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
1244 /* Make sure that anybody stopping the queue after this
1245 * sees the new next_to_clean.
1249 if (netif_queue_stopped(netdev) &&
1250 !(test_bit(__E1000_DOWN, &adapter->state))) {
1251 netif_wake_queue(netdev);
1252 ++adapter->restart_queue;
1256 if (adapter->detect_tx_hung) {
1257 /* Detect a transmit hang in hardware, this serializes the
1258 * check with the clearing of time_stamp and movement of i
1260 adapter->detect_tx_hung = false;
1261 if (tx_ring->buffer_info[i].time_stamp &&
1262 time_after(jiffies, tx_ring->buffer_info[i].time_stamp
1263 + (adapter->tx_timeout_factor * HZ)) &&
1264 !(er32(STATUS) & E1000_STATUS_TXOFF))
1265 schedule_work(&adapter->print_hang_task);
1267 adapter->tx_hang_recheck = false;
1269 adapter->total_tx_bytes += total_tx_bytes;
1270 adapter->total_tx_packets += total_tx_packets;
1271 return count < tx_ring->count;
1275 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
1276 * @rx_ring: Rx descriptor ring
1278 * the return value indicates whether actual cleaning was done, there
1279 * is no guarantee that everything was cleaned
1281 static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done,
1284 struct e1000_adapter *adapter = rx_ring->adapter;
1285 struct e1000_hw *hw = &adapter->hw;
1286 union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
1287 struct net_device *netdev = adapter->netdev;
1288 struct pci_dev *pdev = adapter->pdev;
1289 struct e1000_buffer *buffer_info, *next_buffer;
1290 struct e1000_ps_page *ps_page;
1291 struct sk_buff *skb;
1293 u32 length, staterr;
1294 int cleaned_count = 0;
1295 bool cleaned = false;
1296 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1298 i = rx_ring->next_to_clean;
1299 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
1300 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1301 buffer_info = &rx_ring->buffer_info[i];
1303 while (staterr & E1000_RXD_STAT_DD) {
1304 if (*work_done >= work_to_do)
1307 skb = buffer_info->skb;
1308 rmb(); /* read descriptor and rx_buffer_info after status DD */
1310 /* in the packet split case this is header only */
1311 prefetch(skb->data - NET_IP_ALIGN);
1314 if (i == rx_ring->count)
1316 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
1319 next_buffer = &rx_ring->buffer_info[i];
1323 dma_unmap_single(&pdev->dev, buffer_info->dma,
1324 adapter->rx_ps_bsize0, DMA_FROM_DEVICE);
1325 buffer_info->dma = 0;
1327 /* see !EOP comment in other Rx routine */
1328 if (!(staterr & E1000_RXD_STAT_EOP))
1329 adapter->flags2 |= FLAG2_IS_DISCARDING;
1331 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
1332 e_dbg("Packet Split buffers didn't pick up the full packet\n");
1333 dev_kfree_skb_irq(skb);
1334 if (staterr & E1000_RXD_STAT_EOP)
1335 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1339 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
1340 !(netdev->features & NETIF_F_RXALL))) {
1341 dev_kfree_skb_irq(skb);
1345 length = le16_to_cpu(rx_desc->wb.middle.length0);
1348 e_dbg("Last part of the packet spanning multiple descriptors\n");
1349 dev_kfree_skb_irq(skb);
1354 skb_put(skb, length);
1357 /* this looks ugly, but it seems compiler issues make
1358 * it more efficient than reusing j
1360 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
1362 /* page alloc/put takes too long and effects small
1363 * packet throughput, so unsplit small packets and
1364 * save the alloc/put only valid in softirq (napi)
1365 * context to call kmap_*
1367 if (l1 && (l1 <= copybreak) &&
1368 ((length + l1) <= adapter->rx_ps_bsize0)) {
1371 ps_page = &buffer_info->ps_pages[0];
1373 /* there is no documentation about how to call
1374 * kmap_atomic, so we can't hold the mapping
1377 dma_sync_single_for_cpu(&pdev->dev,
1381 vaddr = kmap_atomic(ps_page->page);
1382 memcpy(skb_tail_pointer(skb), vaddr, l1);
1383 kunmap_atomic(vaddr);
1384 dma_sync_single_for_device(&pdev->dev,
1389 /* remove the CRC */
1390 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1391 if (!(netdev->features & NETIF_F_RXFCS))
1400 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1401 length = le16_to_cpu(rx_desc->wb.upper.length[j]);
1405 ps_page = &buffer_info->ps_pages[j];
1406 dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1409 skb_fill_page_desc(skb, j, ps_page->page, 0, length);
1410 ps_page->page = NULL;
1412 skb->data_len += length;
1413 skb->truesize += PAGE_SIZE;
1416 /* strip the ethernet crc, problem is we're using pages now so
1417 * this whole operation can get a little cpu intensive
1419 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1420 if (!(netdev->features & NETIF_F_RXFCS))
1421 pskb_trim(skb, skb->len - 4);
1425 total_rx_bytes += skb->len;
1428 e1000_rx_checksum(adapter, staterr, skb);
1430 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1432 if (rx_desc->wb.upper.header_status &
1433 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
1434 adapter->rx_hdr_split++;
1436 e1000_receive_skb(adapter, netdev, skb, staterr,
1437 rx_desc->wb.middle.vlan);
1440 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
1441 buffer_info->skb = NULL;
1443 /* return some buffers to hardware, one at a time is too slow */
1444 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
1445 adapter->alloc_rx_buf(rx_ring, cleaned_count,
1450 /* use prefetched values */
1452 buffer_info = next_buffer;
1454 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1456 rx_ring->next_to_clean = i;
1458 cleaned_count = e1000_desc_unused(rx_ring);
1460 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
1462 adapter->total_rx_bytes += total_rx_bytes;
1463 adapter->total_rx_packets += total_rx_packets;
1468 * e1000_consume_page - helper function
1470 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
1475 skb->data_len += length;
1476 skb->truesize += PAGE_SIZE;
1480 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
1481 * @adapter: board private structure
1483 * the return value indicates whether actual cleaning was done, there
1484 * is no guarantee that everything was cleaned
1486 static bool e1000_clean_jumbo_rx_irq(struct e1000_ring *rx_ring, int *work_done,
1489 struct e1000_adapter *adapter = rx_ring->adapter;
1490 struct net_device *netdev = adapter->netdev;
1491 struct pci_dev *pdev = adapter->pdev;
1492 union e1000_rx_desc_extended *rx_desc, *next_rxd;
1493 struct e1000_buffer *buffer_info, *next_buffer;
1494 u32 length, staterr;
1496 int cleaned_count = 0;
1497 bool cleaned = false;
1498 unsigned int total_rx_bytes=0, total_rx_packets=0;
1500 i = rx_ring->next_to_clean;
1501 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
1502 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1503 buffer_info = &rx_ring->buffer_info[i];
1505 while (staterr & E1000_RXD_STAT_DD) {
1506 struct sk_buff *skb;
1508 if (*work_done >= work_to_do)
1511 rmb(); /* read descriptor and rx_buffer_info after status DD */
1513 skb = buffer_info->skb;
1514 buffer_info->skb = NULL;
1517 if (i == rx_ring->count)
1519 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
1522 next_buffer = &rx_ring->buffer_info[i];
1526 dma_unmap_page(&pdev->dev, buffer_info->dma, PAGE_SIZE,
1528 buffer_info->dma = 0;
1530 length = le16_to_cpu(rx_desc->wb.upper.length);
1532 /* errors is only valid for DD + EOP descriptors */
1533 if (unlikely((staterr & E1000_RXD_STAT_EOP) &&
1534 ((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
1535 !(netdev->features & NETIF_F_RXALL)))) {
1536 /* recycle both page and skb */
1537 buffer_info->skb = skb;
1538 /* an error means any chain goes out the window too */
1539 if (rx_ring->rx_skb_top)
1540 dev_kfree_skb_irq(rx_ring->rx_skb_top);
1541 rx_ring->rx_skb_top = NULL;
1545 #define rxtop (rx_ring->rx_skb_top)
1546 if (!(staterr & E1000_RXD_STAT_EOP)) {
1547 /* this descriptor is only the beginning (or middle) */
1549 /* this is the beginning of a chain */
1551 skb_fill_page_desc(rxtop, 0, buffer_info->page,
1554 /* this is the middle of a chain */
1555 skb_fill_page_desc(rxtop,
1556 skb_shinfo(rxtop)->nr_frags,
1557 buffer_info->page, 0, length);
1558 /* re-use the skb, only consumed the page */
1559 buffer_info->skb = skb;
1561 e1000_consume_page(buffer_info, rxtop, length);
1565 /* end of the chain */
1566 skb_fill_page_desc(rxtop,
1567 skb_shinfo(rxtop)->nr_frags,
1568 buffer_info->page, 0, length);
1569 /* re-use the current skb, we only consumed the
1572 buffer_info->skb = skb;
1575 e1000_consume_page(buffer_info, skb, length);
1577 /* no chain, got EOP, this buf is the packet
1578 * copybreak to save the put_page/alloc_page
1580 if (length <= copybreak &&
1581 skb_tailroom(skb) >= length) {
1583 vaddr = kmap_atomic(buffer_info->page);
1584 memcpy(skb_tail_pointer(skb), vaddr,
1586 kunmap_atomic(vaddr);
1587 /* re-use the page, so don't erase
1590 skb_put(skb, length);
1592 skb_fill_page_desc(skb, 0,
1593 buffer_info->page, 0,
1595 e1000_consume_page(buffer_info, skb,
1601 /* Receive Checksum Offload */
1602 e1000_rx_checksum(adapter, staterr, skb);
1604 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1606 /* probably a little skewed due to removing CRC */
1607 total_rx_bytes += skb->len;
1610 /* eth type trans needs skb->data to point to something */
1611 if (!pskb_may_pull(skb, ETH_HLEN)) {
1612 e_err("pskb_may_pull failed.\n");
1613 dev_kfree_skb_irq(skb);
1617 e1000_receive_skb(adapter, netdev, skb, staterr,
1618 rx_desc->wb.upper.vlan);
1621 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
1623 /* return some buffers to hardware, one at a time is too slow */
1624 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
1625 adapter->alloc_rx_buf(rx_ring, cleaned_count,
1630 /* use prefetched values */
1632 buffer_info = next_buffer;
1634 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1636 rx_ring->next_to_clean = i;
1638 cleaned_count = e1000_desc_unused(rx_ring);
1640 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
1642 adapter->total_rx_bytes += total_rx_bytes;
1643 adapter->total_rx_packets += total_rx_packets;
1648 * e1000_clean_rx_ring - Free Rx Buffers per Queue
1649 * @rx_ring: Rx descriptor ring
1651 static void e1000_clean_rx_ring(struct e1000_ring *rx_ring)
1653 struct e1000_adapter *adapter = rx_ring->adapter;
1654 struct e1000_buffer *buffer_info;
1655 struct e1000_ps_page *ps_page;
1656 struct pci_dev *pdev = adapter->pdev;
1659 /* Free all the Rx ring sk_buffs */
1660 for (i = 0; i < rx_ring->count; i++) {
1661 buffer_info = &rx_ring->buffer_info[i];
1662 if (buffer_info->dma) {
1663 if (adapter->clean_rx == e1000_clean_rx_irq)
1664 dma_unmap_single(&pdev->dev, buffer_info->dma,
1665 adapter->rx_buffer_len,
1667 else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq)
1668 dma_unmap_page(&pdev->dev, buffer_info->dma,
1671 else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
1672 dma_unmap_single(&pdev->dev, buffer_info->dma,
1673 adapter->rx_ps_bsize0,
1675 buffer_info->dma = 0;
1678 if (buffer_info->page) {
1679 put_page(buffer_info->page);
1680 buffer_info->page = NULL;
1683 if (buffer_info->skb) {
1684 dev_kfree_skb(buffer_info->skb);
1685 buffer_info->skb = NULL;
1688 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1689 ps_page = &buffer_info->ps_pages[j];
1692 dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1695 put_page(ps_page->page);
1696 ps_page->page = NULL;
1700 /* there also may be some cached data from a chained receive */
1701 if (rx_ring->rx_skb_top) {
1702 dev_kfree_skb(rx_ring->rx_skb_top);
1703 rx_ring->rx_skb_top = NULL;
1706 /* Zero out the descriptor ring */
1707 memset(rx_ring->desc, 0, rx_ring->size);
1709 rx_ring->next_to_clean = 0;
1710 rx_ring->next_to_use = 0;
1711 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1713 writel(0, rx_ring->head);
1714 if (rx_ring->adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
1715 e1000e_update_rdt_wa(rx_ring, 0);
1717 writel(0, rx_ring->tail);
1720 static void e1000e_downshift_workaround(struct work_struct *work)
1722 struct e1000_adapter *adapter = container_of(work,
1723 struct e1000_adapter, downshift_task);
1725 if (test_bit(__E1000_DOWN, &adapter->state))
1728 e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
1732 * e1000_intr_msi - Interrupt Handler
1733 * @irq: interrupt number
1734 * @data: pointer to a network interface device structure
1736 static irqreturn_t e1000_intr_msi(int __always_unused irq, void *data)
1738 struct net_device *netdev = data;
1739 struct e1000_adapter *adapter = netdev_priv(netdev);
1740 struct e1000_hw *hw = &adapter->hw;
1741 u32 icr = er32(ICR);
1743 /* read ICR disables interrupts using IAM */
1744 if (icr & E1000_ICR_LSC) {
1745 hw->mac.get_link_status = true;
1746 /* ICH8 workaround-- Call gig speed drop workaround on cable
1747 * disconnect (LSC) before accessing any PHY registers
1749 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1750 (!(er32(STATUS) & E1000_STATUS_LU)))
1751 schedule_work(&adapter->downshift_task);
1753 /* 80003ES2LAN workaround-- For packet buffer work-around on
1754 * link down event; disable receives here in the ISR and reset
1755 * adapter in watchdog
1757 if (netif_carrier_ok(netdev) &&
1758 adapter->flags & FLAG_RX_NEEDS_RESTART) {
1759 /* disable receives */
1760 u32 rctl = er32(RCTL);
1761 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1762 adapter->flags |= FLAG_RESTART_NOW;
1764 /* guard against interrupt when we're going down */
1765 if (!test_bit(__E1000_DOWN, &adapter->state))
1766 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1769 /* Reset on uncorrectable ECC error */
1770 if ((icr & E1000_ICR_ECCER) && (hw->mac.type == e1000_pch_lpt)) {
1771 u32 pbeccsts = er32(PBECCSTS);
1773 adapter->corr_errors +=
1774 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
1775 adapter->uncorr_errors +=
1776 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
1777 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
1779 /* Do the reset outside of interrupt context */
1780 schedule_work(&adapter->reset_task);
1782 /* return immediately since reset is imminent */
1786 if (napi_schedule_prep(&adapter->napi)) {
1787 adapter->total_tx_bytes = 0;
1788 adapter->total_tx_packets = 0;
1789 adapter->total_rx_bytes = 0;
1790 adapter->total_rx_packets = 0;
1791 __napi_schedule(&adapter->napi);
1798 * e1000_intr - Interrupt Handler
1799 * @irq: interrupt number
1800 * @data: pointer to a network interface device structure
1802 static irqreturn_t e1000_intr(int __always_unused irq, void *data)
1804 struct net_device *netdev = data;
1805 struct e1000_adapter *adapter = netdev_priv(netdev);
1806 struct e1000_hw *hw = &adapter->hw;
1807 u32 rctl, icr = er32(ICR);
1809 if (!icr || test_bit(__E1000_DOWN, &adapter->state))
1810 return IRQ_NONE; /* Not our interrupt */
1812 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1813 * not set, then the adapter didn't send an interrupt
1815 if (!(icr & E1000_ICR_INT_ASSERTED))
1818 /* Interrupt Auto-Mask...upon reading ICR,
1819 * interrupts are masked. No need for the
1823 if (icr & E1000_ICR_LSC) {
1824 hw->mac.get_link_status = true;
1825 /* ICH8 workaround-- Call gig speed drop workaround on cable
1826 * disconnect (LSC) before accessing any PHY registers
1828 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1829 (!(er32(STATUS) & E1000_STATUS_LU)))
1830 schedule_work(&adapter->downshift_task);
1832 /* 80003ES2LAN workaround--
1833 * For packet buffer work-around on link down event;
1834 * disable receives here in the ISR and
1835 * reset adapter in watchdog
1837 if (netif_carrier_ok(netdev) &&
1838 (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
1839 /* disable receives */
1841 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1842 adapter->flags |= FLAG_RESTART_NOW;
1844 /* guard against interrupt when we're going down */
1845 if (!test_bit(__E1000_DOWN, &adapter->state))
1846 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1849 /* Reset on uncorrectable ECC error */
1850 if ((icr & E1000_ICR_ECCER) && (hw->mac.type == e1000_pch_lpt)) {
1851 u32 pbeccsts = er32(PBECCSTS);
1853 adapter->corr_errors +=
1854 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
1855 adapter->uncorr_errors +=
1856 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
1857 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
1859 /* Do the reset outside of interrupt context */
1860 schedule_work(&adapter->reset_task);
1862 /* return immediately since reset is imminent */
1866 if (napi_schedule_prep(&adapter->napi)) {
1867 adapter->total_tx_bytes = 0;
1868 adapter->total_tx_packets = 0;
1869 adapter->total_rx_bytes = 0;
1870 adapter->total_rx_packets = 0;
1871 __napi_schedule(&adapter->napi);
1877 static irqreturn_t e1000_msix_other(int __always_unused irq, void *data)
1879 struct net_device *netdev = data;
1880 struct e1000_adapter *adapter = netdev_priv(netdev);
1881 struct e1000_hw *hw = &adapter->hw;
1882 u32 icr = er32(ICR);
1884 if (!(icr & E1000_ICR_INT_ASSERTED)) {
1885 if (!test_bit(__E1000_DOWN, &adapter->state))
1886 ew32(IMS, E1000_IMS_OTHER);
1890 if (icr & adapter->eiac_mask)
1891 ew32(ICS, (icr & adapter->eiac_mask));
1893 if (icr & E1000_ICR_OTHER) {
1894 if (!(icr & E1000_ICR_LSC))
1895 goto no_link_interrupt;
1896 hw->mac.get_link_status = true;
1897 /* guard against interrupt when we're going down */
1898 if (!test_bit(__E1000_DOWN, &adapter->state))
1899 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1903 if (!test_bit(__E1000_DOWN, &adapter->state))
1904 ew32(IMS, E1000_IMS_LSC | E1000_IMS_OTHER);
1909 static irqreturn_t e1000_intr_msix_tx(int __always_unused irq, void *data)
1911 struct net_device *netdev = data;
1912 struct e1000_adapter *adapter = netdev_priv(netdev);
1913 struct e1000_hw *hw = &adapter->hw;
1914 struct e1000_ring *tx_ring = adapter->tx_ring;
1917 adapter->total_tx_bytes = 0;
1918 adapter->total_tx_packets = 0;
1920 if (!e1000_clean_tx_irq(tx_ring))
1921 /* Ring was not completely cleaned, so fire another interrupt */
1922 ew32(ICS, tx_ring->ims_val);
1927 static irqreturn_t e1000_intr_msix_rx(int __always_unused irq, void *data)
1929 struct net_device *netdev = data;
1930 struct e1000_adapter *adapter = netdev_priv(netdev);
1931 struct e1000_ring *rx_ring = adapter->rx_ring;
1933 /* Write the ITR value calculated at the end of the
1934 * previous interrupt.
1936 if (rx_ring->set_itr) {
1937 writel(1000000000 / (rx_ring->itr_val * 256),
1938 rx_ring->itr_register);
1939 rx_ring->set_itr = 0;
1942 if (napi_schedule_prep(&adapter->napi)) {
1943 adapter->total_rx_bytes = 0;
1944 adapter->total_rx_packets = 0;
1945 __napi_schedule(&adapter->napi);
1951 * e1000_configure_msix - Configure MSI-X hardware
1953 * e1000_configure_msix sets up the hardware to properly
1954 * generate MSI-X interrupts.
1956 static void e1000_configure_msix(struct e1000_adapter *adapter)
1958 struct e1000_hw *hw = &adapter->hw;
1959 struct e1000_ring *rx_ring = adapter->rx_ring;
1960 struct e1000_ring *tx_ring = adapter->tx_ring;
1962 u32 ctrl_ext, ivar = 0;
1964 adapter->eiac_mask = 0;
1966 /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1967 if (hw->mac.type == e1000_82574) {
1968 u32 rfctl = er32(RFCTL);
1969 rfctl |= E1000_RFCTL_ACK_DIS;
1973 #define E1000_IVAR_INT_ALLOC_VALID 0x8
1974 /* Configure Rx vector */
1975 rx_ring->ims_val = E1000_IMS_RXQ0;
1976 adapter->eiac_mask |= rx_ring->ims_val;
1977 if (rx_ring->itr_val)
1978 writel(1000000000 / (rx_ring->itr_val * 256),
1979 rx_ring->itr_register);
1981 writel(1, rx_ring->itr_register);
1982 ivar = E1000_IVAR_INT_ALLOC_VALID | vector;
1984 /* Configure Tx vector */
1985 tx_ring->ims_val = E1000_IMS_TXQ0;
1987 if (tx_ring->itr_val)
1988 writel(1000000000 / (tx_ring->itr_val * 256),
1989 tx_ring->itr_register);
1991 writel(1, tx_ring->itr_register);
1992 adapter->eiac_mask |= tx_ring->ims_val;
1993 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8);
1995 /* set vector for Other Causes, e.g. link changes */
1997 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16);
1998 if (rx_ring->itr_val)
1999 writel(1000000000 / (rx_ring->itr_val * 256),
2000 hw->hw_addr + E1000_EITR_82574(vector));
2002 writel(1, hw->hw_addr + E1000_EITR_82574(vector));
2004 /* Cause Tx interrupts on every write back */
2009 /* enable MSI-X PBA support */
2010 ctrl_ext = er32(CTRL_EXT);
2011 ctrl_ext |= E1000_CTRL_EXT_PBA_CLR;
2013 /* Auto-Mask Other interrupts upon ICR read */
2014 ew32(IAM, ~E1000_EIAC_MASK_82574 | E1000_IMS_OTHER);
2015 ctrl_ext |= E1000_CTRL_EXT_EIAME;
2016 ew32(CTRL_EXT, ctrl_ext);
2020 void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter)
2022 if (adapter->msix_entries) {
2023 pci_disable_msix(adapter->pdev);
2024 kfree(adapter->msix_entries);
2025 adapter->msix_entries = NULL;
2026 } else if (adapter->flags & FLAG_MSI_ENABLED) {
2027 pci_disable_msi(adapter->pdev);
2028 adapter->flags &= ~FLAG_MSI_ENABLED;
2033 * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
2035 * Attempt to configure interrupts using the best available
2036 * capabilities of the hardware and kernel.
2038 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
2043 switch (adapter->int_mode) {
2044 case E1000E_INT_MODE_MSIX:
2045 if (adapter->flags & FLAG_HAS_MSIX) {
2046 adapter->num_vectors = 3; /* RxQ0, TxQ0 and other */
2047 adapter->msix_entries = kcalloc(adapter->num_vectors,
2048 sizeof(struct msix_entry),
2050 if (adapter->msix_entries) {
2051 for (i = 0; i < adapter->num_vectors; i++)
2052 adapter->msix_entries[i].entry = i;
2054 err = pci_enable_msix(adapter->pdev,
2055 adapter->msix_entries,
2056 adapter->num_vectors);
2060 /* MSI-X failed, so fall through and try MSI */
2061 e_err("Failed to initialize MSI-X interrupts. Falling back to MSI interrupts.\n");
2062 e1000e_reset_interrupt_capability(adapter);
2064 adapter->int_mode = E1000E_INT_MODE_MSI;
2066 case E1000E_INT_MODE_MSI:
2067 if (!pci_enable_msi(adapter->pdev)) {
2068 adapter->flags |= FLAG_MSI_ENABLED;
2070 adapter->int_mode = E1000E_INT_MODE_LEGACY;
2071 e_err("Failed to initialize MSI interrupts. Falling back to legacy interrupts.\n");
2074 case E1000E_INT_MODE_LEGACY:
2075 /* Don't do anything; this is the system default */
2079 /* store the number of vectors being used */
2080 adapter->num_vectors = 1;
2084 * e1000_request_msix - Initialize MSI-X interrupts
2086 * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
2089 static int e1000_request_msix(struct e1000_adapter *adapter)
2091 struct net_device *netdev = adapter->netdev;
2092 int err = 0, vector = 0;
2094 if (strlen(netdev->name) < (IFNAMSIZ - 5))
2095 snprintf(adapter->rx_ring->name,
2096 sizeof(adapter->rx_ring->name) - 1,
2097 "%s-rx-0", netdev->name);
2099 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
2100 err = request_irq(adapter->msix_entries[vector].vector,
2101 e1000_intr_msix_rx, 0, adapter->rx_ring->name,
2105 adapter->rx_ring->itr_register = adapter->hw.hw_addr +
2106 E1000_EITR_82574(vector);
2107 adapter->rx_ring->itr_val = adapter->itr;
2110 if (strlen(netdev->name) < (IFNAMSIZ - 5))
2111 snprintf(adapter->tx_ring->name,
2112 sizeof(adapter->tx_ring->name) - 1,
2113 "%s-tx-0", netdev->name);
2115 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
2116 err = request_irq(adapter->msix_entries[vector].vector,
2117 e1000_intr_msix_tx, 0, adapter->tx_ring->name,
2121 adapter->tx_ring->itr_register = adapter->hw.hw_addr +
2122 E1000_EITR_82574(vector);
2123 adapter->tx_ring->itr_val = adapter->itr;
2126 err = request_irq(adapter->msix_entries[vector].vector,
2127 e1000_msix_other, 0, netdev->name, netdev);
2131 e1000_configure_msix(adapter);
2137 * e1000_request_irq - initialize interrupts
2139 * Attempts to configure interrupts using the best available
2140 * capabilities of the hardware and kernel.
2142 static int e1000_request_irq(struct e1000_adapter *adapter)
2144 struct net_device *netdev = adapter->netdev;
2147 if (adapter->msix_entries) {
2148 err = e1000_request_msix(adapter);
2151 /* fall back to MSI */
2152 e1000e_reset_interrupt_capability(adapter);
2153 adapter->int_mode = E1000E_INT_MODE_MSI;
2154 e1000e_set_interrupt_capability(adapter);
2156 if (adapter->flags & FLAG_MSI_ENABLED) {
2157 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0,
2158 netdev->name, netdev);
2162 /* fall back to legacy interrupt */
2163 e1000e_reset_interrupt_capability(adapter);
2164 adapter->int_mode = E1000E_INT_MODE_LEGACY;
2167 err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED,
2168 netdev->name, netdev);
2170 e_err("Unable to allocate interrupt, Error: %d\n", err);
2175 static void e1000_free_irq(struct e1000_adapter *adapter)
2177 struct net_device *netdev = adapter->netdev;
2179 if (adapter->msix_entries) {
2182 free_irq(adapter->msix_entries[vector].vector, netdev);
2185 free_irq(adapter->msix_entries[vector].vector, netdev);
2188 /* Other Causes interrupt vector */
2189 free_irq(adapter->msix_entries[vector].vector, netdev);
2193 free_irq(adapter->pdev->irq, netdev);
2197 * e1000_irq_disable - Mask off interrupt generation on the NIC
2199 static void e1000_irq_disable(struct e1000_adapter *adapter)
2201 struct e1000_hw *hw = &adapter->hw;
2204 if (adapter->msix_entries)
2205 ew32(EIAC_82574, 0);
2208 if (adapter->msix_entries) {
2210 for (i = 0; i < adapter->num_vectors; i++)
2211 synchronize_irq(adapter->msix_entries[i].vector);
2213 synchronize_irq(adapter->pdev->irq);
2218 * e1000_irq_enable - Enable default interrupt generation settings
2220 static void e1000_irq_enable(struct e1000_adapter *adapter)
2222 struct e1000_hw *hw = &adapter->hw;
2224 if (adapter->msix_entries) {
2225 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
2226 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
2227 } else if (hw->mac.type == e1000_pch_lpt) {
2228 ew32(IMS, IMS_ENABLE_MASK | E1000_IMS_ECCER);
2230 ew32(IMS, IMS_ENABLE_MASK);
2236 * e1000e_get_hw_control - get control of the h/w from f/w
2237 * @adapter: address of board private structure
2239 * e1000e_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
2240 * For ASF and Pass Through versions of f/w this means that
2241 * the driver is loaded. For AMT version (only with 82573)
2242 * of the f/w this means that the network i/f is open.
2244 void e1000e_get_hw_control(struct e1000_adapter *adapter)
2246 struct e1000_hw *hw = &adapter->hw;
2250 /* Let firmware know the driver has taken over */
2251 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2253 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
2254 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2255 ctrl_ext = er32(CTRL_EXT);
2256 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
2261 * e1000e_release_hw_control - release control of the h/w to f/w
2262 * @adapter: address of board private structure
2264 * e1000e_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
2265 * For ASF and Pass Through versions of f/w this means that the
2266 * driver is no longer loaded. For AMT version (only with 82573) i
2267 * of the f/w this means that the network i/f is closed.
2270 void e1000e_release_hw_control(struct e1000_adapter *adapter)
2272 struct e1000_hw *hw = &adapter->hw;
2276 /* Let firmware taken over control of h/w */
2277 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2279 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
2280 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2281 ctrl_ext = er32(CTRL_EXT);
2282 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
2287 * e1000_alloc_ring_dma - allocate memory for a ring structure
2289 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
2290 struct e1000_ring *ring)
2292 struct pci_dev *pdev = adapter->pdev;
2294 ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
2303 * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
2304 * @tx_ring: Tx descriptor ring
2306 * Return 0 on success, negative on failure
2308 int e1000e_setup_tx_resources(struct e1000_ring *tx_ring)
2310 struct e1000_adapter *adapter = tx_ring->adapter;
2311 int err = -ENOMEM, size;
2313 size = sizeof(struct e1000_buffer) * tx_ring->count;
2314 tx_ring->buffer_info = vzalloc(size);
2315 if (!tx_ring->buffer_info)
2318 /* round up to nearest 4K */
2319 tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
2320 tx_ring->size = ALIGN(tx_ring->size, 4096);
2322 err = e1000_alloc_ring_dma(adapter, tx_ring);
2326 tx_ring->next_to_use = 0;
2327 tx_ring->next_to_clean = 0;
2331 vfree(tx_ring->buffer_info);
2332 e_err("Unable to allocate memory for the transmit descriptor ring\n");
2337 * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
2338 * @rx_ring: Rx descriptor ring
2340 * Returns 0 on success, negative on failure
2342 int e1000e_setup_rx_resources(struct e1000_ring *rx_ring)
2344 struct e1000_adapter *adapter = rx_ring->adapter;
2345 struct e1000_buffer *buffer_info;
2346 int i, size, desc_len, err = -ENOMEM;
2348 size = sizeof(struct e1000_buffer) * rx_ring->count;
2349 rx_ring->buffer_info = vzalloc(size);
2350 if (!rx_ring->buffer_info)
2353 for (i = 0; i < rx_ring->count; i++) {
2354 buffer_info = &rx_ring->buffer_info[i];
2355 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
2356 sizeof(struct e1000_ps_page),
2358 if (!buffer_info->ps_pages)
2362 desc_len = sizeof(union e1000_rx_desc_packet_split);
2364 /* Round up to nearest 4K */
2365 rx_ring->size = rx_ring->count * desc_len;
2366 rx_ring->size = ALIGN(rx_ring->size, 4096);
2368 err = e1000_alloc_ring_dma(adapter, rx_ring);
2372 rx_ring->next_to_clean = 0;
2373 rx_ring->next_to_use = 0;
2374 rx_ring->rx_skb_top = NULL;
2379 for (i = 0; i < rx_ring->count; i++) {
2380 buffer_info = &rx_ring->buffer_info[i];
2381 kfree(buffer_info->ps_pages);
2384 vfree(rx_ring->buffer_info);
2385 e_err("Unable to allocate memory for the receive descriptor ring\n");
2390 * e1000_clean_tx_ring - Free Tx Buffers
2391 * @tx_ring: Tx descriptor ring
2393 static void e1000_clean_tx_ring(struct e1000_ring *tx_ring)
2395 struct e1000_adapter *adapter = tx_ring->adapter;
2396 struct e1000_buffer *buffer_info;
2400 for (i = 0; i < tx_ring->count; i++) {
2401 buffer_info = &tx_ring->buffer_info[i];
2402 e1000_put_txbuf(tx_ring, buffer_info);
2405 netdev_reset_queue(adapter->netdev);
2406 size = sizeof(struct e1000_buffer) * tx_ring->count;
2407 memset(tx_ring->buffer_info, 0, size);
2409 memset(tx_ring->desc, 0, tx_ring->size);
2411 tx_ring->next_to_use = 0;
2412 tx_ring->next_to_clean = 0;
2414 writel(0, tx_ring->head);
2415 if (tx_ring->adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
2416 e1000e_update_tdt_wa(tx_ring, 0);
2418 writel(0, tx_ring->tail);
2422 * e1000e_free_tx_resources - Free Tx Resources per Queue
2423 * @tx_ring: Tx descriptor ring
2425 * Free all transmit software resources
2427 void e1000e_free_tx_resources(struct e1000_ring *tx_ring)
2429 struct e1000_adapter *adapter = tx_ring->adapter;
2430 struct pci_dev *pdev = adapter->pdev;
2432 e1000_clean_tx_ring(tx_ring);
2434 vfree(tx_ring->buffer_info);
2435 tx_ring->buffer_info = NULL;
2437 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2439 tx_ring->desc = NULL;
2443 * e1000e_free_rx_resources - Free Rx Resources
2444 * @rx_ring: Rx descriptor ring
2446 * Free all receive software resources
2448 void e1000e_free_rx_resources(struct e1000_ring *rx_ring)
2450 struct e1000_adapter *adapter = rx_ring->adapter;
2451 struct pci_dev *pdev = adapter->pdev;
2454 e1000_clean_rx_ring(rx_ring);
2456 for (i = 0; i < rx_ring->count; i++)
2457 kfree(rx_ring->buffer_info[i].ps_pages);
2459 vfree(rx_ring->buffer_info);
2460 rx_ring->buffer_info = NULL;
2462 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2464 rx_ring->desc = NULL;
2468 * e1000_update_itr - update the dynamic ITR value based on statistics
2469 * @adapter: pointer to adapter
2470 * @itr_setting: current adapter->itr
2471 * @packets: the number of packets during this measurement interval
2472 * @bytes: the number of bytes during this measurement interval
2474 * Stores a new ITR value based on packets and byte
2475 * counts during the last interrupt. The advantage of per interrupt
2476 * computation is faster updates and more accurate ITR for the current
2477 * traffic pattern. Constants in this function were computed
2478 * based on theoretical maximum wire speed and thresholds were set based
2479 * on testing data as well as attempting to minimize response time
2480 * while increasing bulk throughput. This functionality is controlled
2481 * by the InterruptThrottleRate module parameter.
2483 static unsigned int e1000_update_itr(u16 itr_setting, int packets, int bytes)
2485 unsigned int retval = itr_setting;
2490 switch (itr_setting) {
2491 case lowest_latency:
2492 /* handle TSO and jumbo frames */
2493 if (bytes/packets > 8000)
2494 retval = bulk_latency;
2495 else if ((packets < 5) && (bytes > 512))
2496 retval = low_latency;
2498 case low_latency: /* 50 usec aka 20000 ints/s */
2499 if (bytes > 10000) {
2500 /* this if handles the TSO accounting */
2501 if (bytes/packets > 8000)
2502 retval = bulk_latency;
2503 else if ((packets < 10) || ((bytes/packets) > 1200))
2504 retval = bulk_latency;
2505 else if ((packets > 35))
2506 retval = lowest_latency;
2507 } else if (bytes/packets > 2000) {
2508 retval = bulk_latency;
2509 } else if (packets <= 2 && bytes < 512) {
2510 retval = lowest_latency;
2513 case bulk_latency: /* 250 usec aka 4000 ints/s */
2514 if (bytes > 25000) {
2516 retval = low_latency;
2517 } else if (bytes < 6000) {
2518 retval = low_latency;
2526 static void e1000_set_itr(struct e1000_adapter *adapter)
2529 u32 new_itr = adapter->itr;
2531 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2532 if (adapter->link_speed != SPEED_1000) {
2538 if (adapter->flags2 & FLAG2_DISABLE_AIM) {
2543 adapter->tx_itr = e1000_update_itr(adapter->tx_itr,
2544 adapter->total_tx_packets,
2545 adapter->total_tx_bytes);
2546 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2547 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2548 adapter->tx_itr = low_latency;
2550 adapter->rx_itr = e1000_update_itr(adapter->rx_itr,
2551 adapter->total_rx_packets,
2552 adapter->total_rx_bytes);
2553 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2554 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2555 adapter->rx_itr = low_latency;
2557 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2559 switch (current_itr) {
2560 /* counts and packets in update_itr are dependent on these numbers */
2561 case lowest_latency:
2565 new_itr = 20000; /* aka hwitr = ~200 */
2575 if (new_itr != adapter->itr) {
2576 /* this attempts to bias the interrupt rate towards Bulk
2577 * by adding intermediate steps when interrupt rate is
2580 new_itr = new_itr > adapter->itr ?
2581 min(adapter->itr + (new_itr >> 2), new_itr) :
2583 adapter->itr = new_itr;
2584 adapter->rx_ring->itr_val = new_itr;
2585 if (adapter->msix_entries)
2586 adapter->rx_ring->set_itr = 1;
2588 e1000e_write_itr(adapter, new_itr);
2593 * e1000e_write_itr - write the ITR value to the appropriate registers
2594 * @adapter: address of board private structure
2595 * @itr: new ITR value to program
2597 * e1000e_write_itr determines if the adapter is in MSI-X mode
2598 * and, if so, writes the EITR registers with the ITR value.
2599 * Otherwise, it writes the ITR value into the ITR register.
2601 void e1000e_write_itr(struct e1000_adapter *adapter, u32 itr)
2603 struct e1000_hw *hw = &adapter->hw;
2604 u32 new_itr = itr ? 1000000000 / (itr * 256) : 0;
2606 if (adapter->msix_entries) {
2609 for (vector = 0; vector < adapter->num_vectors; vector++)
2610 writel(new_itr, hw->hw_addr + E1000_EITR_82574(vector));
2617 * e1000_alloc_queues - Allocate memory for all rings
2618 * @adapter: board private structure to initialize
2620 static int e1000_alloc_queues(struct e1000_adapter *adapter)
2622 int size = sizeof(struct e1000_ring);
2624 adapter->tx_ring = kzalloc(size, GFP_KERNEL);
2625 if (!adapter->tx_ring)
2627 adapter->tx_ring->count = adapter->tx_ring_count;
2628 adapter->tx_ring->adapter = adapter;
2630 adapter->rx_ring = kzalloc(size, GFP_KERNEL);
2631 if (!adapter->rx_ring)
2633 adapter->rx_ring->count = adapter->rx_ring_count;
2634 adapter->rx_ring->adapter = adapter;
2638 e_err("Unable to allocate memory for queues\n");
2639 kfree(adapter->rx_ring);
2640 kfree(adapter->tx_ring);
2645 * e1000e_poll - NAPI Rx polling callback
2646 * @napi: struct associated with this polling callback
2647 * @weight: number of packets driver is allowed to process this poll
2649 static int e1000e_poll(struct napi_struct *napi, int weight)
2651 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
2653 struct e1000_hw *hw = &adapter->hw;
2654 struct net_device *poll_dev = adapter->netdev;
2655 int tx_cleaned = 1, work_done = 0;
2657 adapter = netdev_priv(poll_dev);
2659 if (!adapter->msix_entries ||
2660 (adapter->rx_ring->ims_val & adapter->tx_ring->ims_val))
2661 tx_cleaned = e1000_clean_tx_irq(adapter->tx_ring);
2663 adapter->clean_rx(adapter->rx_ring, &work_done, weight);
2668 /* If weight not fully consumed, exit the polling mode */
2669 if (work_done < weight) {
2670 if (adapter->itr_setting & 3)
2671 e1000_set_itr(adapter);
2672 napi_complete(napi);
2673 if (!test_bit(__E1000_DOWN, &adapter->state)) {
2674 if (adapter->msix_entries)
2675 ew32(IMS, adapter->rx_ring->ims_val);
2677 e1000_irq_enable(adapter);
2684 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2686 struct e1000_adapter *adapter = netdev_priv(netdev);
2687 struct e1000_hw *hw = &adapter->hw;
2690 /* don't update vlan cookie if already programmed */
2691 if ((adapter->hw.mng_cookie.status &
2692 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2693 (vid == adapter->mng_vlan_id))
2696 /* add VID to filter table */
2697 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2698 index = (vid >> 5) & 0x7F;
2699 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2700 vfta |= (1 << (vid & 0x1F));
2701 hw->mac.ops.write_vfta(hw, index, vfta);
2704 set_bit(vid, adapter->active_vlans);
2709 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2711 struct e1000_adapter *adapter = netdev_priv(netdev);
2712 struct e1000_hw *hw = &adapter->hw;
2715 if ((adapter->hw.mng_cookie.status &
2716 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2717 (vid == adapter->mng_vlan_id)) {
2718 /* release control to f/w */
2719 e1000e_release_hw_control(adapter);
2723 /* remove VID from filter table */
2724 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2725 index = (vid >> 5) & 0x7F;
2726 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2727 vfta &= ~(1 << (vid & 0x1F));
2728 hw->mac.ops.write_vfta(hw, index, vfta);
2731 clear_bit(vid, adapter->active_vlans);
2737 * e1000e_vlan_filter_disable - helper to disable hw VLAN filtering
2738 * @adapter: board private structure to initialize
2740 static void e1000e_vlan_filter_disable(struct e1000_adapter *adapter)
2742 struct net_device *netdev = adapter->netdev;
2743 struct e1000_hw *hw = &adapter->hw;
2746 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2747 /* disable VLAN receive filtering */
2749 rctl &= ~(E1000_RCTL_VFE | E1000_RCTL_CFIEN);
2752 if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) {
2753 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
2754 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2760 * e1000e_vlan_filter_enable - helper to enable HW VLAN filtering
2761 * @adapter: board private structure to initialize
2763 static void e1000e_vlan_filter_enable(struct e1000_adapter *adapter)
2765 struct e1000_hw *hw = &adapter->hw;
2768 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2769 /* enable VLAN receive filtering */
2771 rctl |= E1000_RCTL_VFE;
2772 rctl &= ~E1000_RCTL_CFIEN;
2778 * e1000e_vlan_strip_enable - helper to disable HW VLAN stripping
2779 * @adapter: board private structure to initialize
2781 static void e1000e_vlan_strip_disable(struct e1000_adapter *adapter)
2783 struct e1000_hw *hw = &adapter->hw;
2786 /* disable VLAN tag insert/strip */
2788 ctrl &= ~E1000_CTRL_VME;
2793 * e1000e_vlan_strip_enable - helper to enable HW VLAN stripping
2794 * @adapter: board private structure to initialize
2796 static void e1000e_vlan_strip_enable(struct e1000_adapter *adapter)
2798 struct e1000_hw *hw = &adapter->hw;
2801 /* enable VLAN tag insert/strip */
2803 ctrl |= E1000_CTRL_VME;
2807 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
2809 struct net_device *netdev = adapter->netdev;
2810 u16 vid = adapter->hw.mng_cookie.vlan_id;
2811 u16 old_vid = adapter->mng_vlan_id;
2813 if (adapter->hw.mng_cookie.status &
2814 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
2815 e1000_vlan_rx_add_vid(netdev, vid);
2816 adapter->mng_vlan_id = vid;
2819 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && (vid != old_vid))
2820 e1000_vlan_rx_kill_vid(netdev, old_vid);
2823 static void e1000_restore_vlan(struct e1000_adapter *adapter)
2827 e1000_vlan_rx_add_vid(adapter->netdev, 0);
2829 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2830 e1000_vlan_rx_add_vid(adapter->netdev, vid);
2833 static void e1000_init_manageability_pt(struct e1000_adapter *adapter)
2835 struct e1000_hw *hw = &adapter->hw;
2836 u32 manc, manc2h, mdef, i, j;
2838 if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
2843 /* enable receiving management packets to the host. this will probably
2844 * generate destination unreachable messages from the host OS, but
2845 * the packets will be handled on SMBUS
2847 manc |= E1000_MANC_EN_MNG2HOST;
2848 manc2h = er32(MANC2H);
2850 switch (hw->mac.type) {
2852 manc2h |= (E1000_MANC2H_PORT_623 | E1000_MANC2H_PORT_664);
2856 /* Check if IPMI pass-through decision filter already exists;
2859 for (i = 0, j = 0; i < 8; i++) {
2860 mdef = er32(MDEF(i));
2862 /* Ignore filters with anything other than IPMI ports */
2863 if (mdef & ~(E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2866 /* Enable this decision filter in MANC2H */
2873 if (j == (E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2876 /* Create new decision filter in an empty filter */
2877 for (i = 0, j = 0; i < 8; i++)
2878 if (er32(MDEF(i)) == 0) {
2879 ew32(MDEF(i), (E1000_MDEF_PORT_623 |
2880 E1000_MDEF_PORT_664));
2887 e_warn("Unable to create IPMI pass-through filter\n");
2891 ew32(MANC2H, manc2h);
2896 * e1000_configure_tx - Configure Transmit Unit after Reset
2897 * @adapter: board private structure
2899 * Configure the Tx unit of the MAC after a reset.
2901 static void e1000_configure_tx(struct e1000_adapter *adapter)
2903 struct e1000_hw *hw = &adapter->hw;
2904 struct e1000_ring *tx_ring = adapter->tx_ring;
2908 /* Setup the HW Tx Head and Tail descriptor pointers */
2909 tdba = tx_ring->dma;
2910 tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
2911 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
2912 ew32(TDBAH(0), (tdba >> 32));
2913 ew32(TDLEN(0), tdlen);
2916 tx_ring->head = adapter->hw.hw_addr + E1000_TDH(0);
2917 tx_ring->tail = adapter->hw.hw_addr + E1000_TDT(0);
2919 /* Set the Tx Interrupt Delay register */
2920 ew32(TIDV, adapter->tx_int_delay);
2921 /* Tx irq moderation */
2922 ew32(TADV, adapter->tx_abs_int_delay);
2924 if (adapter->flags2 & FLAG2_DMA_BURST) {
2925 u32 txdctl = er32(TXDCTL(0));
2926 txdctl &= ~(E1000_TXDCTL_PTHRESH | E1000_TXDCTL_HTHRESH |
2927 E1000_TXDCTL_WTHRESH);
2928 /* set up some performance related parameters to encourage the
2929 * hardware to use the bus more efficiently in bursts, depends
2930 * on the tx_int_delay to be enabled,
2931 * wthresh = 1 ==> burst write is disabled to avoid Tx stalls
2932 * hthresh = 1 ==> prefetch when one or more available
2933 * pthresh = 0x1f ==> prefetch if internal cache 31 or less
2934 * BEWARE: this seems to work but should be considered first if
2935 * there are Tx hangs or other Tx related bugs
2937 txdctl |= E1000_TXDCTL_DMA_BURST_ENABLE;
2938 ew32(TXDCTL(0), txdctl);
2940 /* erratum work around: set txdctl the same for both queues */
2941 ew32(TXDCTL(1), er32(TXDCTL(0)));
2943 if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
2944 tarc = er32(TARC(0));
2945 /* set the speed mode bit, we'll clear it if we're not at
2946 * gigabit link later
2948 #define SPEED_MODE_BIT (1 << 21)
2949 tarc |= SPEED_MODE_BIT;
2950 ew32(TARC(0), tarc);
2953 /* errata: program both queues to unweighted RR */
2954 if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
2955 tarc = er32(TARC(0));
2957 ew32(TARC(0), tarc);
2958 tarc = er32(TARC(1));
2960 ew32(TARC(1), tarc);
2963 /* Setup Transmit Descriptor Settings for eop descriptor */
2964 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
2966 /* only set IDE if we are delaying interrupts using the timers */
2967 if (adapter->tx_int_delay)
2968 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
2970 /* enable Report Status bit */
2971 adapter->txd_cmd |= E1000_TXD_CMD_RS;
2973 hw->mac.ops.config_collision_dist(hw);
2977 * e1000_setup_rctl - configure the receive control registers
2978 * @adapter: Board private structure
2980 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
2981 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
2982 static void e1000_setup_rctl(struct e1000_adapter *adapter)
2984 struct e1000_hw *hw = &adapter->hw;
2988 /* Workaround Si errata on PCHx - configure jumbo frame flow */
2989 if (hw->mac.type >= e1000_pch2lan) {
2992 if (adapter->netdev->mtu > ETH_DATA_LEN)
2993 ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, true);
2995 ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, false);
2998 e_dbg("failed to enable jumbo frame workaround mode\n");
3001 /* Program MC offset vector base */
3003 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
3004 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
3005 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
3006 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
3008 /* Do not Store bad packets */
3009 rctl &= ~E1000_RCTL_SBP;
3011 /* Enable Long Packet receive */
3012 if (adapter->netdev->mtu <= ETH_DATA_LEN)
3013 rctl &= ~E1000_RCTL_LPE;
3015 rctl |= E1000_RCTL_LPE;
3017 /* Some systems expect that the CRC is included in SMBUS traffic. The
3018 * hardware strips the CRC before sending to both SMBUS (BMC) and to
3019 * host memory when this is enabled
3021 if (adapter->flags2 & FLAG2_CRC_STRIPPING)
3022 rctl |= E1000_RCTL_SECRC;
3024 /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
3025 if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) {
3028 e1e_rphy(hw, PHY_REG(770, 26), &phy_data);
3030 phy_data |= (1 << 2);
3031 e1e_wphy(hw, PHY_REG(770, 26), phy_data);
3033 e1e_rphy(hw, 22, &phy_data);
3035 phy_data |= (1 << 14);
3036 e1e_wphy(hw, 0x10, 0x2823);
3037 e1e_wphy(hw, 0x11, 0x0003);
3038 e1e_wphy(hw, 22, phy_data);
3041 /* Setup buffer sizes */
3042 rctl &= ~E1000_RCTL_SZ_4096;
3043 rctl |= E1000_RCTL_BSEX;
3044 switch (adapter->rx_buffer_len) {
3047 rctl |= E1000_RCTL_SZ_2048;
3048 rctl &= ~E1000_RCTL_BSEX;
3051 rctl |= E1000_RCTL_SZ_4096;
3054 rctl |= E1000_RCTL_SZ_8192;
3057 rctl |= E1000_RCTL_SZ_16384;
3061 /* Enable Extended Status in all Receive Descriptors */
3062 rfctl = er32(RFCTL);
3063 rfctl |= E1000_RFCTL_EXTEN;
3066 /* 82571 and greater support packet-split where the protocol
3067 * header is placed in skb->data and the packet data is
3068 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
3069 * In the case of a non-split, skb->data is linearly filled,
3070 * followed by the page buffers. Therefore, skb->data is
3071 * sized to hold the largest protocol header.
3073 * allocations using alloc_page take too long for regular MTU
3074 * so only enable packet split for jumbo frames
3076 * Using pages when the page size is greater than 16k wastes
3077 * a lot of memory, since we allocate 3 pages at all times
3080 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
3081 if ((pages <= 3) && (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
3082 adapter->rx_ps_pages = pages;
3084 adapter->rx_ps_pages = 0;
3086 if (adapter->rx_ps_pages) {
3089 /* Enable Packet split descriptors */
3090 rctl |= E1000_RCTL_DTYP_PS;
3092 psrctl |= adapter->rx_ps_bsize0 >>
3093 E1000_PSRCTL_BSIZE0_SHIFT;
3095 switch (adapter->rx_ps_pages) {
3097 psrctl |= PAGE_SIZE <<
3098 E1000_PSRCTL_BSIZE3_SHIFT;
3100 psrctl |= PAGE_SIZE <<
3101 E1000_PSRCTL_BSIZE2_SHIFT;
3103 psrctl |= PAGE_SIZE >>
3104 E1000_PSRCTL_BSIZE1_SHIFT;
3108 ew32(PSRCTL, psrctl);
3111 /* This is useful for sniffing bad packets. */
3112 if (adapter->netdev->features & NETIF_F_RXALL) {
3113 /* UPE and MPE will be handled by normal PROMISC logic
3114 * in e1000e_set_rx_mode
3116 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
3117 E1000_RCTL_BAM | /* RX All Bcast Pkts */
3118 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
3120 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
3121 E1000_RCTL_DPF | /* Allow filtered pause */
3122 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
3123 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
3124 * and that breaks VLANs.
3129 /* just started the receive unit, no need to restart */
3130 adapter->flags &= ~FLAG_RESTART_NOW;
3134 * e1000_configure_rx - Configure Receive Unit after Reset
3135 * @adapter: board private structure
3137 * Configure the Rx unit of the MAC after a reset.
3139 static void e1000_configure_rx(struct e1000_adapter *adapter)
3141 struct e1000_hw *hw = &adapter->hw;
3142 struct e1000_ring *rx_ring = adapter->rx_ring;
3144 u32 rdlen, rctl, rxcsum, ctrl_ext;
3146 if (adapter->rx_ps_pages) {
3147 /* this is a 32 byte descriptor */
3148 rdlen = rx_ring->count *
3149 sizeof(union e1000_rx_desc_packet_split);
3150 adapter->clean_rx = e1000_clean_rx_irq_ps;
3151 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
3152 } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) {
3153 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
3154 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
3155 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
3157 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
3158 adapter->clean_rx = e1000_clean_rx_irq;
3159 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
3162 /* disable receives while setting up the descriptors */
3164 if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
3165 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3167 usleep_range(10000, 20000);
3169 if (adapter->flags2 & FLAG2_DMA_BURST) {
3170 /* set the writeback threshold (only takes effect if the RDTR
3171 * is set). set GRAN=1 and write back up to 0x4 worth, and
3172 * enable prefetching of 0x20 Rx descriptors
3178 ew32(RXDCTL(0), E1000_RXDCTL_DMA_BURST_ENABLE);
3179 ew32(RXDCTL(1), E1000_RXDCTL_DMA_BURST_ENABLE);
3181 /* override the delay timers for enabling bursting, only if
3182 * the value was not set by the user via module options
3184 if (adapter->rx_int_delay == DEFAULT_RDTR)
3185 adapter->rx_int_delay = BURST_RDTR;
3186 if (adapter->rx_abs_int_delay == DEFAULT_RADV)
3187 adapter->rx_abs_int_delay = BURST_RADV;
3190 /* set the Receive Delay Timer Register */
3191 ew32(RDTR, adapter->rx_int_delay);
3193 /* irq moderation */
3194 ew32(RADV, adapter->rx_abs_int_delay);
3195 if ((adapter->itr_setting != 0) && (adapter->itr != 0))
3196 e1000e_write_itr(adapter, adapter->itr);
3198 ctrl_ext = er32(CTRL_EXT);
3199 /* Auto-Mask interrupts upon ICR access */
3200 ctrl_ext |= E1000_CTRL_EXT_IAME;
3201 ew32(IAM, 0xffffffff);
3202 ew32(CTRL_EXT, ctrl_ext);
3205 /* Setup the HW Rx Head and Tail Descriptor Pointers and
3206 * the Base and Length of the Rx Descriptor Ring
3208 rdba = rx_ring->dma;
3209 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
3210 ew32(RDBAH(0), (rdba >> 32));
3211 ew32(RDLEN(0), rdlen);
3214 rx_ring->head = adapter->hw.hw_addr + E1000_RDH(0);
3215 rx_ring->tail = adapter->hw.hw_addr + E1000_RDT(0);
3217 /* Enable Receive Checksum Offload for TCP and UDP */
3218 rxcsum = er32(RXCSUM);
3219 if (adapter->netdev->features & NETIF_F_RXCSUM)
3220 rxcsum |= E1000_RXCSUM_TUOFL;
3222 rxcsum &= ~E1000_RXCSUM_TUOFL;
3223 ew32(RXCSUM, rxcsum);
3225 /* With jumbo frames, excessive C-state transition latencies result
3226 * in dropped transactions.
3228 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3230 ((er32(PBA) & E1000_PBA_RXA_MASK) * 1024 -
3231 adapter->max_frame_size) * 8 / 1000;
3233 if (adapter->flags & FLAG_IS_ICH) {
3234 u32 rxdctl = er32(RXDCTL(0));
3235 ew32(RXDCTL(0), rxdctl | 0x3);
3238 pm_qos_update_request(&adapter->netdev->pm_qos_req, lat);
3240 pm_qos_update_request(&adapter->netdev->pm_qos_req,
3241 PM_QOS_DEFAULT_VALUE);
3244 /* Enable Receives */
3249 * e1000e_write_mc_addr_list - write multicast addresses to MTA
3250 * @netdev: network interface device structure
3252 * Writes multicast address list to the MTA hash table.
3253 * Returns: -ENOMEM on failure
3254 * 0 on no addresses written
3255 * X on writing X addresses to MTA
3257 static int e1000e_write_mc_addr_list(struct net_device *netdev)
3259 struct e1000_adapter *adapter = netdev_priv(netdev);
3260 struct e1000_hw *hw = &adapter->hw;
3261 struct netdev_hw_addr *ha;
3265 if (netdev_mc_empty(netdev)) {
3266 /* nothing to program, so clear mc list */
3267 hw->mac.ops.update_mc_addr_list(hw, NULL, 0);
3271 mta_list = kzalloc(netdev_mc_count(netdev) * ETH_ALEN, GFP_ATOMIC);
3275 /* update_mc_addr_list expects a packed array of only addresses. */
3277 netdev_for_each_mc_addr(ha, netdev)
3278 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
3280 hw->mac.ops.update_mc_addr_list(hw, mta_list, i);
3283 return netdev_mc_count(netdev);
3287 * e1000e_write_uc_addr_list - write unicast addresses to RAR table
3288 * @netdev: network interface device structure
3290 * Writes unicast address list to the RAR table.
3291 * Returns: -ENOMEM on failure/insufficient address space
3292 * 0 on no addresses written
3293 * X on writing X addresses to the RAR table
3295 static int e1000e_write_uc_addr_list(struct net_device *netdev)
3297 struct e1000_adapter *adapter = netdev_priv(netdev);
3298 struct e1000_hw *hw = &adapter->hw;
3299 unsigned int rar_entries = hw->mac.rar_entry_count;
3302 /* save a rar entry for our hardware address */
3305 /* save a rar entry for the LAA workaround */
3306 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA)
3309 /* return ENOMEM indicating insufficient memory for addresses */
3310 if (netdev_uc_count(netdev) > rar_entries)
3313 if (!netdev_uc_empty(netdev) && rar_entries) {
3314 struct netdev_hw_addr *ha;
3316 /* write the addresses in reverse order to avoid write
3319 netdev_for_each_uc_addr(ha, netdev) {
3322 hw->mac.ops.rar_set(hw, ha->addr, rar_entries--);
3327 /* zero out the remaining RAR entries not used above */
3328 for (; rar_entries > 0; rar_entries--) {
3329 ew32(RAH(rar_entries), 0);
3330 ew32(RAL(rar_entries), 0);
3338 * e1000e_set_rx_mode - secondary unicast, Multicast and Promiscuous mode set
3339 * @netdev: network interface device structure
3341 * The ndo_set_rx_mode entry point is called whenever the unicast or multicast
3342 * address list or the network interface flags are updated. This routine is
3343 * responsible for configuring the hardware for proper unicast, multicast,
3344 * promiscuous mode, and all-multi behavior.
3346 static void e1000e_set_rx_mode(struct net_device *netdev)
3348 struct e1000_adapter *adapter = netdev_priv(netdev);
3349 struct e1000_hw *hw = &adapter->hw;
3352 /* Check for Promiscuous and All Multicast modes */
3355 /* clear the affected bits */
3356 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
3358 if (netdev->flags & IFF_PROMISC) {
3359 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
3360 /* Do not hardware filter VLANs in promisc mode */
3361 e1000e_vlan_filter_disable(adapter);
3365 if (netdev->flags & IFF_ALLMULTI) {
3366 rctl |= E1000_RCTL_MPE;
3368 /* Write addresses to the MTA, if the attempt fails
3369 * then we should just turn on promiscuous mode so
3370 * that we can at least receive multicast traffic
3372 count = e1000e_write_mc_addr_list(netdev);
3374 rctl |= E1000_RCTL_MPE;
3376 e1000e_vlan_filter_enable(adapter);
3377 /* Write addresses to available RAR registers, if there is not
3378 * sufficient space to store all the addresses then enable
3379 * unicast promiscuous mode
3381 count = e1000e_write_uc_addr_list(netdev);
3383 rctl |= E1000_RCTL_UPE;
3388 if (netdev->features & NETIF_F_HW_VLAN_RX)
3389 e1000e_vlan_strip_enable(adapter);
3391 e1000e_vlan_strip_disable(adapter);
3394 static void e1000e_setup_rss_hash(struct e1000_adapter *adapter)
3396 struct e1000_hw *hw = &adapter->hw;
3399 static const u32 rsskey[10] = {
3400 0xda565a6d, 0xc20e5b25, 0x3d256741, 0xb08fa343, 0xcb2bcad0,
3401 0xb4307bae, 0xa32dcb77, 0x0cf23080, 0x3bb7426a, 0xfa01acbe
3404 /* Fill out hash function seed */
3405 for (i = 0; i < 10; i++)
3406 ew32(RSSRK(i), rsskey[i]);
3408 /* Direct all traffic to queue 0 */
3409 for (i = 0; i < 32; i++)
3412 /* Disable raw packet checksumming so that RSS hash is placed in
3413 * descriptor on writeback.
3415 rxcsum = er32(RXCSUM);
3416 rxcsum |= E1000_RXCSUM_PCSD;
3418 ew32(RXCSUM, rxcsum);
3420 mrqc = (E1000_MRQC_RSS_FIELD_IPV4 |
3421 E1000_MRQC_RSS_FIELD_IPV4_TCP |
3422 E1000_MRQC_RSS_FIELD_IPV6 |
3423 E1000_MRQC_RSS_FIELD_IPV6_TCP |
3424 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX);
3430 * e1000e_get_base_timinca - get default SYSTIM time increment attributes
3431 * @adapter: board private structure
3432 * @timinca: pointer to returned time increment attributes
3434 * Get attributes for incrementing the System Time Register SYSTIML/H at
3435 * the default base frequency, and set the cyclecounter shift value.
3437 s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca)
3439 struct e1000_hw *hw = &adapter->hw;
3440 u32 incvalue, incperiod, shift;
3442 /* Make sure clock is enabled on I217 before checking the frequency */
3443 if ((hw->mac.type == e1000_pch_lpt) &&
3444 !(er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) &&
3445 !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_ENABLED)) {
3446 u32 fextnvm7 = er32(FEXTNVM7);
3448 if (!(fextnvm7 & (1 << 0))) {
3449 ew32(FEXTNVM7, fextnvm7 | (1 << 0));
3454 switch (hw->mac.type) {
3457 /* On I217, the clock frequency is 25MHz or 96MHz as
3458 * indicated by the System Clock Frequency Indication
3460 if ((hw->mac.type != e1000_pch_lpt) ||
3461 (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI)) {
3462 /* Stable 96MHz frequency */
3463 incperiod = INCPERIOD_96MHz;
3464 incvalue = INCVALUE_96MHz;
3465 shift = INCVALUE_SHIFT_96MHz;
3466 adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHz;
3472 /* Stable 25MHz frequency */
3473 incperiod = INCPERIOD_25MHz;
3474 incvalue = INCVALUE_25MHz;
3475 shift = INCVALUE_SHIFT_25MHz;
3476 adapter->cc.shift = shift;
3482 *timinca = ((incperiod << E1000_TIMINCA_INCPERIOD_SHIFT) |
3483 ((incvalue << shift) & E1000_TIMINCA_INCVALUE_MASK));
3489 * e1000e_config_hwtstamp - configure the hwtstamp registers and enable/disable
3490 * @adapter: board private structure
3492 * Outgoing time stamping can be enabled and disabled. Play nice and
3493 * disable it when requested, although it shouldn't cause any overhead
3494 * when no packet needs it. At most one packet in the queue may be
3495 * marked for time stamping, otherwise it would be impossible to tell
3496 * for sure to which packet the hardware time stamp belongs.
3498 * Incoming time stamping has to be configured via the hardware filters.
3499 * Not all combinations are supported, in particular event type has to be
3500 * specified. Matching the kind of event packet is not supported, with the
3501 * exception of "all V2 events regardless of level 2 or 4".
3503 static int e1000e_config_hwtstamp(struct e1000_adapter *adapter)
3505 struct e1000_hw *hw = &adapter->hw;
3506 struct hwtstamp_config *config = &adapter->hwtstamp_config;
3507 u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED;
3508 u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED;
3516 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP))
3519 /* flags reserved for future extensions - must be zero */
3523 switch (config->tx_type) {
3524 case HWTSTAMP_TX_OFF:
3527 case HWTSTAMP_TX_ON:
3533 switch (config->rx_filter) {
3534 case HWTSTAMP_FILTER_NONE:
3537 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
3538 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
3539 rxmtrl = E1000_RXMTRL_PTP_V1_SYNC_MESSAGE;
3542 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
3543 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
3544 rxmtrl = E1000_RXMTRL_PTP_V1_DELAY_REQ_MESSAGE;
3547 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
3548 /* Also time stamps V2 L2 Path Delay Request/Response */
3549 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2;
3550 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE;
3553 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
3554 /* Also time stamps V2 L2 Path Delay Request/Response. */
3555 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2;
3556 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE;
3559 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
3560 /* Hardware cannot filter just V2 L4 Sync messages;
3561 * fall-through to V2 (both L2 and L4) Sync.
3563 case HWTSTAMP_FILTER_PTP_V2_SYNC:
3564 /* Also time stamps V2 Path Delay Request/Response. */
3565 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
3566 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE;
3570 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
3571 /* Hardware cannot filter just V2 L4 Delay Request messages;
3572 * fall-through to V2 (both L2 and L4) Delay Request.
3574 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
3575 /* Also time stamps V2 Path Delay Request/Response. */
3576 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
3577 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE;
3581 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
3582 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
3583 /* Hardware cannot filter just V2 L4 or L2 Event messages;
3584 * fall-through to all V2 (both L2 and L4) Events.
3586 case HWTSTAMP_FILTER_PTP_V2_EVENT:
3587 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2;
3588 config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
3592 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
3593 /* For V1, the hardware can only filter Sync messages or
3594 * Delay Request messages but not both so fall-through to
3595 * time stamp all packets.
3597 case HWTSTAMP_FILTER_ALL:
3600 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL;
3601 config->rx_filter = HWTSTAMP_FILTER_ALL;
3607 /* enable/disable Tx h/w time stamping */
3608 regval = er32(TSYNCTXCTL);
3609 regval &= ~E1000_TSYNCTXCTL_ENABLED;
3610 regval |= tsync_tx_ctl;
3611 ew32(TSYNCTXCTL, regval);
3612 if ((er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) !=
3613 (regval & E1000_TSYNCTXCTL_ENABLED)) {
3614 e_err("Timesync Tx Control register not set as expected\n");
3618 /* enable/disable Rx h/w time stamping */
3619 regval = er32(TSYNCRXCTL);
3620 regval &= ~(E1000_TSYNCRXCTL_ENABLED | E1000_TSYNCRXCTL_TYPE_MASK);
3621 regval |= tsync_rx_ctl;
3622 ew32(TSYNCRXCTL, regval);
3623 if ((er32(TSYNCRXCTL) & (E1000_TSYNCRXCTL_ENABLED |
3624 E1000_TSYNCRXCTL_TYPE_MASK)) !=
3625 (regval & (E1000_TSYNCRXCTL_ENABLED |
3626 E1000_TSYNCRXCTL_TYPE_MASK))) {
3627 e_err("Timesync Rx Control register not set as expected\n");
3631 /* L2: define ethertype filter for time stamped packets */
3633 rxmtrl |= ETH_P_1588;
3635 /* define which PTP packets get time stamped */
3636 ew32(RXMTRL, rxmtrl);
3638 /* Filter by destination port */
3640 rxudp = PTP_EV_PORT;
3641 cpu_to_be16s(&rxudp);
3647 /* Clear TSYNCRXCTL_VALID & TSYNCTXCTL_VALID bit */
3651 /* Get and set the System Time Register SYSTIM base frequency */
3652 ret_val = e1000e_get_base_timinca(adapter, ®val);
3655 ew32(TIMINCA, regval);
3657 /* reset the ns time counter */
3658 timecounter_init(&adapter->tc, &adapter->cc,
3659 ktime_to_ns(ktime_get_real()));
3665 * e1000_configure - configure the hardware for Rx and Tx
3666 * @adapter: private board structure
3668 static void e1000_configure(struct e1000_adapter *adapter)
3670 struct e1000_ring *rx_ring = adapter->rx_ring;
3672 e1000e_set_rx_mode(adapter->netdev);
3674 e1000_restore_vlan(adapter);
3675 e1000_init_manageability_pt(adapter);
3677 e1000_configure_tx(adapter);
3679 if (adapter->netdev->features & NETIF_F_RXHASH)
3680 e1000e_setup_rss_hash(adapter);
3681 e1000_setup_rctl(adapter);
3682 e1000_configure_rx(adapter);
3683 adapter->alloc_rx_buf(rx_ring, e1000_desc_unused(rx_ring), GFP_KERNEL);
3687 * e1000e_power_up_phy - restore link in case the phy was powered down
3688 * @adapter: address of board private structure
3690 * The phy may be powered down to save power and turn off link when the
3691 * driver is unloaded and wake on lan is not enabled (among others)
3692 * *** this routine MUST be followed by a call to e1000e_reset ***
3694 void e1000e_power_up_phy(struct e1000_adapter *adapter)
3696 if (adapter->hw.phy.ops.power_up)
3697 adapter->hw.phy.ops.power_up(&adapter->hw);
3699 adapter->hw.mac.ops.setup_link(&adapter->hw);
3703 * e1000_power_down_phy - Power down the PHY
3705 * Power down the PHY so no link is implied when interface is down.
3706 * The PHY cannot be powered down if management or WoL is active.
3708 static void e1000_power_down_phy(struct e1000_adapter *adapter)
3710 /* WoL is enabled */
3714 if (adapter->hw.phy.ops.power_down)
3715 adapter->hw.phy.ops.power_down(&adapter->hw);
3719 * e1000e_reset - bring the hardware into a known good state
3721 * This function boots the hardware and enables some settings that
3722 * require a configuration cycle of the hardware - those cannot be
3723 * set/changed during runtime. After reset the device needs to be
3724 * properly configured for Rx, Tx etc.
3726 void e1000e_reset(struct e1000_adapter *adapter)
3728 struct e1000_mac_info *mac = &adapter->hw.mac;
3729 struct e1000_fc_info *fc = &adapter->hw.fc;
3730 struct e1000_hw *hw = &adapter->hw;
3731 u32 tx_space, min_tx_space, min_rx_space;
3732 u32 pba = adapter->pba;
3735 /* reset Packet Buffer Allocation to default */
3738 if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
3739 /* To maintain wire speed transmits, the Tx FIFO should be
3740 * large enough to accommodate two full transmit packets,
3741 * rounded up to the next 1KB and expressed in KB. Likewise,
3742 * the Rx FIFO should be large enough to accommodate at least
3743 * one full receive packet and is similarly rounded up and
3747 /* upper 16 bits has Tx packet buffer allocation size in KB */
3748 tx_space = pba >> 16;
3749 /* lower 16 bits has Rx packet buffer allocation size in KB */
3751 /* the Tx fifo also stores 16 bytes of information about the Tx
3752 * but don't include ethernet FCS because hardware appends it
3754 min_tx_space = (adapter->max_frame_size +
3755 sizeof(struct e1000_tx_desc) -
3757 min_tx_space = ALIGN(min_tx_space, 1024);
3758 min_tx_space >>= 10;
3759 /* software strips receive CRC, so leave room for it */
3760 min_rx_space = adapter->max_frame_size;
3761 min_rx_space = ALIGN(min_rx_space, 1024);
3762 min_rx_space >>= 10;
3764 /* If current Tx allocation is less than the min Tx FIFO size,
3765 * and the min Tx FIFO size is less than the current Rx FIFO
3766 * allocation, take space away from current Rx allocation
3768 if ((tx_space < min_tx_space) &&
3769 ((min_tx_space - tx_space) < pba)) {
3770 pba -= min_tx_space - tx_space;
3772 /* if short on Rx space, Rx wins and must trump Tx
3775 if (pba < min_rx_space)
3782 /* flow control settings
3784 * The high water mark must be low enough to fit one full frame
3785 * (or the size used for early receive) above it in the Rx FIFO.
3786 * Set it to the lower of:
3787 * - 90% of the Rx FIFO size, and
3788 * - the full Rx FIFO size minus one full frame
3790 if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
3791 fc->pause_time = 0xFFFF;
3793 fc->pause_time = E1000_FC_PAUSE_TIME;
3794 fc->send_xon = true;
3795 fc->current_mode = fc->requested_mode;
3797 switch (hw->mac.type) {
3799 case e1000_ich10lan:
3800 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3803 fc->high_water = 0x2800;
3804 fc->low_water = fc->high_water - 8;
3809 hwm = min(((pba << 10) * 9 / 10),
3810 ((pba << 10) - adapter->max_frame_size));
3812 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */
3813 fc->low_water = fc->high_water - 8;
3816 /* Workaround PCH LOM adapter hangs with certain network
3817 * loads. If hangs persist, try disabling Tx flow control.
3819 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3820 fc->high_water = 0x3500;
3821 fc->low_water = 0x1500;
3823 fc->high_water = 0x5000;
3824 fc->low_water = 0x3000;
3826 fc->refresh_time = 0x1000;
3830 fc->refresh_time = 0x0400;
3832 if (adapter->netdev->mtu <= ETH_DATA_LEN) {
3833 fc->high_water = 0x05C20;
3834 fc->low_water = 0x05048;
3835 fc->pause_time = 0x0650;
3839 fc->high_water = ((pba << 10) * 9 / 10) & E1000_FCRTH_RTH;
3840 fc->low_water = ((pba << 10) * 8 / 10) & E1000_FCRTL_RTL;
3844 /* Alignment of Tx data is on an arbitrary byte boundary with the
3845 * maximum size per Tx descriptor limited only to the transmit
3846 * allocation of the packet buffer minus 96 bytes with an upper
3847 * limit of 24KB due to receive synchronization limitations.
3849 adapter->tx_fifo_limit = min_t(u32, ((er32(PBA) >> 16) << 10) - 96,
3852 /* Disable Adaptive Interrupt Moderation if 2 full packets cannot
3853 * fit in receive buffer.
3855 if (adapter->itr_setting & 0x3) {
3856 if ((adapter->max_frame_size * 2) > (pba << 10)) {
3857 if (!(adapter->flags2 & FLAG2_DISABLE_AIM)) {
3858 dev_info(&adapter->pdev->dev,
3859 "Interrupt Throttle Rate turned off\n");
3860 adapter->flags2 |= FLAG2_DISABLE_AIM;
3861 e1000e_write_itr(adapter, 0);
3863 } else if (adapter->flags2 & FLAG2_DISABLE_AIM) {
3864 dev_info(&adapter->pdev->dev,
3865 "Interrupt Throttle Rate turned on\n");
3866 adapter->flags2 &= ~FLAG2_DISABLE_AIM;
3867 adapter->itr = 20000;
3868 e1000e_write_itr(adapter, adapter->itr);
3872 /* Allow time for pending master requests to run */
3873 mac->ops.reset_hw(hw);
3875 /* For parts with AMT enabled, let the firmware know
3876 * that the network interface is in control
3878 if (adapter->flags & FLAG_HAS_AMT)
3879 e1000e_get_hw_control(adapter);
3883 if (mac->ops.init_hw(hw))
3884 e_err("Hardware Error\n");
3886 e1000_update_mng_vlan(adapter);
3888 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
3889 ew32(VET, ETH_P_8021Q);
3891 e1000e_reset_adaptive(hw);
3893 /* initialize systim and reset the ns time counter */
3894 e1000e_config_hwtstamp(adapter);
3896 if (!netif_running(adapter->netdev) &&
3897 !test_bit(__E1000_TESTING, &adapter->state)) {
3898 e1000_power_down_phy(adapter);
3902 e1000_get_phy_info(hw);
3904 if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) &&
3905 !(adapter->flags & FLAG_SMART_POWER_DOWN)) {
3907 /* speed up time to link by disabling smart power down, ignore
3908 * the return value of this function because there is nothing
3909 * different we would do if it failed
3911 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
3912 phy_data &= ~IGP02E1000_PM_SPD;
3913 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
3917 int e1000e_up(struct e1000_adapter *adapter)
3919 struct e1000_hw *hw = &adapter->hw;
3921 /* hardware has been reset, we need to reload some things */
3922 e1000_configure(adapter);
3924 clear_bit(__E1000_DOWN, &adapter->state);
3926 if (adapter->msix_entries)
3927 e1000_configure_msix(adapter);
3928 e1000_irq_enable(adapter);
3930 netif_start_queue(adapter->netdev);
3932 /* fire a link change interrupt to start the watchdog */
3933 if (adapter->msix_entries)
3934 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
3936 ew32(ICS, E1000_ICS_LSC);
3941 static void e1000e_flush_descriptors(struct e1000_adapter *adapter)
3943 struct e1000_hw *hw = &adapter->hw;
3945 if (!(adapter->flags2 & FLAG2_DMA_BURST))
3948 /* flush pending descriptor writebacks to memory */
3949 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
3950 ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD);
3952 /* execute the writes immediately */
3955 /* due to rare timing issues, write to TIDV/RDTR again to ensure the
3956 * write is successful
3958 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
3959 ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD);
3961 /* execute the writes immediately */
3965 static void e1000e_update_stats(struct e1000_adapter *adapter);
3967 void e1000e_down(struct e1000_adapter *adapter)
3969 struct net_device *netdev = adapter->netdev;
3970 struct e1000_hw *hw = &adapter->hw;
3973 /* signal that we're down so the interrupt handler does not
3974 * reschedule our watchdog timer
3976 set_bit(__E1000_DOWN, &adapter->state);
3978 /* disable receives in the hardware */
3980 if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
3981 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3982 /* flush and sleep below */
3984 netif_stop_queue(netdev);
3986 /* disable transmits in the hardware */
3988 tctl &= ~E1000_TCTL_EN;
3991 /* flush both disables and wait for them to finish */
3993 usleep_range(10000, 20000);
3995 e1000_irq_disable(adapter);
3997 del_timer_sync(&adapter->watchdog_timer);
3998 del_timer_sync(&adapter->phy_info_timer);
4000 netif_carrier_off(netdev);
4002 spin_lock(&adapter->stats64_lock);
4003 e1000e_update_stats(adapter);
4004 spin_unlock(&adapter->stats64_lock);
4006 e1000e_flush_descriptors(adapter);
4007 e1000_clean_tx_ring(adapter->tx_ring);
4008 e1000_clean_rx_ring(adapter->rx_ring);
4010 adapter->link_speed = 0;
4011 adapter->link_duplex = 0;
4013 if (!pci_channel_offline(adapter->pdev))
4014 e1000e_reset(adapter);
4016 /* TODO: for power management, we could drop the link and
4017 * pci_disable_device here.
4021 void e1000e_reinit_locked(struct e1000_adapter *adapter)
4024 while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
4025 usleep_range(1000, 2000);
4026 e1000e_down(adapter);
4028 clear_bit(__E1000_RESETTING, &adapter->state);
4032 * e1000e_cyclecounter_read - read raw cycle counter (used by time counter)
4033 * @cc: cyclecounter structure
4035 static cycle_t e1000e_cyclecounter_read(const struct cyclecounter *cc)
4037 struct e1000_adapter *adapter = container_of(cc, struct e1000_adapter,
4039 struct e1000_hw *hw = &adapter->hw;
4042 /* latch SYSTIMH on read of SYSTIML */
4043 systim = (cycle_t)er32(SYSTIML);
4044 systim |= (cycle_t)er32(SYSTIMH) << 32;
4050 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
4051 * @adapter: board private structure to initialize
4053 * e1000_sw_init initializes the Adapter private data structure.
4054 * Fields are initialized based on PCI device information and
4055 * OS network device settings (MTU size).
4057 static int e1000_sw_init(struct e1000_adapter *adapter)
4059 struct net_device *netdev = adapter->netdev;
4061 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
4062 adapter->rx_ps_bsize0 = 128;
4063 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
4064 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
4065 adapter->tx_ring_count = E1000_DEFAULT_TXD;
4066 adapter->rx_ring_count = E1000_DEFAULT_RXD;
4068 spin_lock_init(&adapter->stats64_lock);
4070 e1000e_set_interrupt_capability(adapter);
4072 if (e1000_alloc_queues(adapter))
4075 /* Setup hardware time stamping cyclecounter */
4076 if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) {
4077 adapter->cc.read = e1000e_cyclecounter_read;
4078 adapter->cc.mask = CLOCKSOURCE_MASK(64);
4079 adapter->cc.mult = 1;
4080 /* cc.shift set in e1000e_get_base_tininca() */
4082 spin_lock_init(&adapter->systim_lock);
4083 INIT_WORK(&adapter->tx_hwtstamp_work, e1000e_tx_hwtstamp_work);
4086 /* Explicitly disable IRQ since the NIC can be in any state. */
4087 e1000_irq_disable(adapter);
4089 set_bit(__E1000_DOWN, &adapter->state);
4094 * e1000_intr_msi_test - Interrupt Handler
4095 * @irq: interrupt number
4096 * @data: pointer to a network interface device structure
4098 static irqreturn_t e1000_intr_msi_test(int __always_unused irq, void *data)
4100 struct net_device *netdev = data;
4101 struct e1000_adapter *adapter = netdev_priv(netdev);
4102 struct e1000_hw *hw = &adapter->hw;
4103 u32 icr = er32(ICR);
4105 e_dbg("icr is %08X\n", icr);
4106 if (icr & E1000_ICR_RXSEQ) {
4107 adapter->flags &= ~FLAG_MSI_TEST_FAILED;
4108 /* Force memory writes to complete before acknowledging the
4109 * interrupt is handled.
4118 * e1000_test_msi_interrupt - Returns 0 for successful test
4119 * @adapter: board private struct
4121 * code flow taken from tg3.c
4123 static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
4125 struct net_device *netdev = adapter->netdev;
4126 struct e1000_hw *hw = &adapter->hw;
4129 /* poll_enable hasn't been called yet, so don't need disable */
4130 /* clear any pending events */
4133 /* free the real vector and request a test handler */
4134 e1000_free_irq(adapter);
4135 e1000e_reset_interrupt_capability(adapter);
4137 /* Assume that the test fails, if it succeeds then the test
4138 * MSI irq handler will unset this flag
4140 adapter->flags |= FLAG_MSI_TEST_FAILED;
4142 err = pci_enable_msi(adapter->pdev);
4144 goto msi_test_failed;
4146 err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0,
4147 netdev->name, netdev);
4149 pci_disable_msi(adapter->pdev);
4150 goto msi_test_failed;
4153 /* Force memory writes to complete before enabling and firing an
4158 e1000_irq_enable(adapter);
4160 /* fire an unusual interrupt on the test handler */
4161 ew32(ICS, E1000_ICS_RXSEQ);
4165 e1000_irq_disable(adapter);
4167 rmb(); /* read flags after interrupt has been fired */
4169 if (adapter->flags & FLAG_MSI_TEST_FAILED) {
4170 adapter->int_mode = E1000E_INT_MODE_LEGACY;
4171 e_info("MSI interrupt test failed, using legacy interrupt.\n");
4173 e_dbg("MSI interrupt test succeeded!\n");
4176 free_irq(adapter->pdev->irq, netdev);
4177 pci_disable_msi(adapter->pdev);
4180 e1000e_set_interrupt_capability(adapter);
4181 return e1000_request_irq(adapter);
4185 * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
4186 * @adapter: board private struct
4188 * code flow taken from tg3.c, called with e1000 interrupts disabled.
4190 static int e1000_test_msi(struct e1000_adapter *adapter)
4195 if (!(adapter->flags & FLAG_MSI_ENABLED))
4198 /* disable SERR in case the MSI write causes a master abort */
4199 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
4200 if (pci_cmd & PCI_COMMAND_SERR)
4201 pci_write_config_word(adapter->pdev, PCI_COMMAND,
4202 pci_cmd & ~PCI_COMMAND_SERR);
4204 err = e1000_test_msi_interrupt(adapter);
4206 /* re-enable SERR */
4207 if (pci_cmd & PCI_COMMAND_SERR) {
4208 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
4209 pci_cmd |= PCI_COMMAND_SERR;
4210 pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
4217 * e1000_open - Called when a network interface is made active
4218 * @netdev: network interface device structure
4220 * Returns 0 on success, negative value on failure
4222 * The open entry point is called when a network interface is made
4223 * active by the system (IFF_UP). At this point all resources needed
4224 * for transmit and receive operations are allocated, the interrupt
4225 * handler is registered with the OS, the watchdog timer is started,
4226 * and the stack is notified that the interface is ready.
4228 static int e1000_open(struct net_device *netdev)
4230 struct e1000_adapter *adapter = netdev_priv(netdev);
4231 struct e1000_hw *hw = &adapter->hw;
4232 struct pci_dev *pdev = adapter->pdev;
4235 /* disallow open during test */
4236 if (test_bit(__E1000_TESTING, &adapter->state))
4239 pm_runtime_get_sync(&pdev->dev);
4241 netif_carrier_off(netdev);
4243 /* allocate transmit descriptors */
4244 err = e1000e_setup_tx_resources(adapter->tx_ring);
4248 /* allocate receive descriptors */
4249 err = e1000e_setup_rx_resources(adapter->rx_ring);
4253 /* If AMT is enabled, let the firmware know that the network
4254 * interface is now open and reset the part to a known state.
4256 if (adapter->flags & FLAG_HAS_AMT) {
4257 e1000e_get_hw_control(adapter);
4258 e1000e_reset(adapter);
4261 e1000e_power_up_phy(adapter);
4263 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4264 if ((adapter->hw.mng_cookie.status &
4265 E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
4266 e1000_update_mng_vlan(adapter);
4268 /* DMA latency requirement to workaround jumbo issue */
4269 pm_qos_add_request(&adapter->netdev->pm_qos_req, PM_QOS_CPU_DMA_LATENCY,
4270 PM_QOS_DEFAULT_VALUE);
4272 /* before we allocate an interrupt, we must be ready to handle it.
4273 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
4274 * as soon as we call pci_request_irq, so we have to setup our
4275 * clean_rx handler before we do so.
4277 e1000_configure(adapter);
4279 err = e1000_request_irq(adapter);
4283 /* Work around PCIe errata with MSI interrupts causing some chipsets to
4284 * ignore e1000e MSI messages, which means we need to test our MSI
4287 if (adapter->int_mode != E1000E_INT_MODE_LEGACY) {
4288 err = e1000_test_msi(adapter);
4290 e_err("Interrupt allocation failed\n");
4295 /* From here on the code is the same as e1000e_up() */
4296 clear_bit(__E1000_DOWN, &adapter->state);
4298 napi_enable(&adapter->napi);
4300 e1000_irq_enable(adapter);
4302 adapter->tx_hang_recheck = false;
4303 netif_start_queue(netdev);
4305 adapter->idle_check = true;
4306 hw->mac.get_link_status = true;
4307 pm_runtime_put(&pdev->dev);
4309 /* fire a link status change interrupt to start the watchdog */
4310 if (adapter->msix_entries)
4311 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
4313 ew32(ICS, E1000_ICS_LSC);
4318 e1000e_release_hw_control(adapter);
4319 e1000_power_down_phy(adapter);
4320 e1000e_free_rx_resources(adapter->rx_ring);
4322 e1000e_free_tx_resources(adapter->tx_ring);
4324 e1000e_reset(adapter);
4325 pm_runtime_put_sync(&pdev->dev);
4331 * e1000_close - Disables a network interface
4332 * @netdev: network interface device structure
4334 * Returns 0, this is not allowed to fail
4336 * The close entry point is called when an interface is de-activated
4337 * by the OS. The hardware is still under the drivers control, but
4338 * needs to be disabled. A global MAC reset is issued to stop the
4339 * hardware, and all transmit and receive resources are freed.
4341 static int e1000_close(struct net_device *netdev)
4343 struct e1000_adapter *adapter = netdev_priv(netdev);
4344 struct pci_dev *pdev = adapter->pdev;
4345 int count = E1000_CHECK_RESET_COUNT;
4347 while (test_bit(__E1000_RESETTING, &adapter->state) && count--)
4348 usleep_range(10000, 20000);
4350 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
4352 pm_runtime_get_sync(&pdev->dev);
4354 napi_disable(&adapter->napi);
4356 if (!test_bit(__E1000_DOWN, &adapter->state)) {
4357 e1000e_down(adapter);
4358 e1000_free_irq(adapter);
4360 e1000_power_down_phy(adapter);
4362 e1000e_free_tx_resources(adapter->tx_ring);
4363 e1000e_free_rx_resources(adapter->rx_ring);
4365 /* kill manageability vlan ID if supported, but not if a vlan with
4366 * the same ID is registered on the host OS (let 8021q kill it)
4368 if (adapter->hw.mng_cookie.status &
4369 E1000_MNG_DHCP_COOKIE_STATUS_VLAN)
4370 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4372 /* If AMT is enabled, let the firmware know that the network
4373 * interface is now closed
4375 if ((adapter->flags & FLAG_HAS_AMT) &&
4376 !test_bit(__E1000_TESTING, &adapter->state))
4377 e1000e_release_hw_control(adapter);
4379 pm_qos_remove_request(&adapter->netdev->pm_qos_req);
4381 pm_runtime_put_sync(&pdev->dev);
4386 * e1000_set_mac - Change the Ethernet Address of the NIC
4387 * @netdev: network interface device structure
4388 * @p: pointer to an address structure
4390 * Returns 0 on success, negative on failure
4392 static int e1000_set_mac(struct net_device *netdev, void *p)
4394 struct e1000_adapter *adapter = netdev_priv(netdev);
4395 struct e1000_hw *hw = &adapter->hw;
4396 struct sockaddr *addr = p;
4398 if (!is_valid_ether_addr(addr->sa_data))
4399 return -EADDRNOTAVAIL;
4401 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
4402 memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
4404 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
4406 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
4407 /* activate the work around */
4408 e1000e_set_laa_state_82571(&adapter->hw, 1);
4410 /* Hold a copy of the LAA in RAR[14] This is done so that
4411 * between the time RAR[0] gets clobbered and the time it
4412 * gets fixed (in e1000_watchdog), the actual LAA is in one
4413 * of the RARs and no incoming packets directed to this port
4414 * are dropped. Eventually the LAA will be in RAR[0] and
4417 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr,
4418 adapter->hw.mac.rar_entry_count - 1);
4425 * e1000e_update_phy_task - work thread to update phy
4426 * @work: pointer to our work struct
4428 * this worker thread exists because we must acquire a
4429 * semaphore to read the phy, which we could msleep while
4430 * waiting for it, and we can't msleep in a timer.
4432 static void e1000e_update_phy_task(struct work_struct *work)
4434 struct e1000_adapter *adapter = container_of(work,
4435 struct e1000_adapter, update_phy_task);
4437 if (test_bit(__E1000_DOWN, &adapter->state))
4440 e1000_get_phy_info(&adapter->hw);
4444 * e1000_update_phy_info - timre call-back to update PHY info
4445 * @data: pointer to adapter cast into an unsigned long
4447 * Need to wait a few seconds after link up to get diagnostic information from
4450 static void e1000_update_phy_info(unsigned long data)
4452 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
4454 if (test_bit(__E1000_DOWN, &adapter->state))
4457 schedule_work(&adapter->update_phy_task);
4461 * e1000e_update_phy_stats - Update the PHY statistics counters
4462 * @adapter: board private structure
4464 * Read/clear the upper 16-bit PHY registers and read/accumulate lower
4466 static void e1000e_update_phy_stats(struct e1000_adapter *adapter)
4468 struct e1000_hw *hw = &adapter->hw;
4472 ret_val = hw->phy.ops.acquire(hw);
4476 /* A page set is expensive so check if already on desired page.
4477 * If not, set to the page with the PHY status registers.
4480 ret_val = e1000e_read_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
4484 if (phy_data != (HV_STATS_PAGE << IGP_PAGE_SHIFT)) {
4485 ret_val = hw->phy.ops.set_page(hw,
4486 HV_STATS_PAGE << IGP_PAGE_SHIFT);
4491 /* Single Collision Count */
4492 hw->phy.ops.read_reg_page(hw, HV_SCC_UPPER, &phy_data);
4493 ret_val = hw->phy.ops.read_reg_page(hw, HV_SCC_LOWER, &phy_data);
4495 adapter->stats.scc += phy_data;
4497 /* Excessive Collision Count */
4498 hw->phy.ops.read_reg_page(hw, HV_ECOL_UPPER, &phy_data);
4499 ret_val = hw->phy.ops.read_reg_page(hw, HV_ECOL_LOWER, &phy_data);
4501 adapter->stats.ecol += phy_data;
4503 /* Multiple Collision Count */
4504 hw->phy.ops.read_reg_page(hw, HV_MCC_UPPER, &phy_data);
4505 ret_val = hw->phy.ops.read_reg_page(hw, HV_MCC_LOWER, &phy_data);
4507 adapter->stats.mcc += phy_data;
4509 /* Late Collision Count */
4510 hw->phy.ops.read_reg_page(hw, HV_LATECOL_UPPER, &phy_data);
4511 ret_val = hw->phy.ops.read_reg_page(hw, HV_LATECOL_LOWER, &phy_data);
4513 adapter->stats.latecol += phy_data;
4515 /* Collision Count - also used for adaptive IFS */
4516 hw->phy.ops.read_reg_page(hw, HV_COLC_UPPER, &phy_data);
4517 ret_val = hw->phy.ops.read_reg_page(hw, HV_COLC_LOWER, &phy_data);
4519 hw->mac.collision_delta = phy_data;
4522 hw->phy.ops.read_reg_page(hw, HV_DC_UPPER, &phy_data);
4523 ret_val = hw->phy.ops.read_reg_page(hw, HV_DC_LOWER, &phy_data);
4525 adapter->stats.dc += phy_data;
4527 /* Transmit with no CRS */
4528 hw->phy.ops.read_reg_page(hw, HV_TNCRS_UPPER, &phy_data);
4529 ret_val = hw->phy.ops.read_reg_page(hw, HV_TNCRS_LOWER, &phy_data);
4531 adapter->stats.tncrs += phy_data;
4534 hw->phy.ops.release(hw);
4538 * e1000e_update_stats - Update the board statistics counters
4539 * @adapter: board private structure
4541 static void e1000e_update_stats(struct e1000_adapter *adapter)
4543 struct net_device *netdev = adapter->netdev;
4544 struct e1000_hw *hw = &adapter->hw;
4545 struct pci_dev *pdev = adapter->pdev;
4547 /* Prevent stats update while adapter is being reset, or if the pci
4548 * connection is down.
4550 if (adapter->link_speed == 0)
4552 if (pci_channel_offline(pdev))
4555 adapter->stats.crcerrs += er32(CRCERRS);
4556 adapter->stats.gprc += er32(GPRC);
4557 adapter->stats.gorc += er32(GORCL);
4558 er32(GORCH); /* Clear gorc */
4559 adapter->stats.bprc += er32(BPRC);
4560 adapter->stats.mprc += er32(MPRC);
4561 adapter->stats.roc += er32(ROC);
4563 adapter->stats.mpc += er32(MPC);
4565 /* Half-duplex statistics */
4566 if (adapter->link_duplex == HALF_DUPLEX) {
4567 if (adapter->flags2 & FLAG2_HAS_PHY_STATS) {
4568 e1000e_update_phy_stats(adapter);
4570 adapter->stats.scc += er32(SCC);
4571 adapter->stats.ecol += er32(ECOL);
4572 adapter->stats.mcc += er32(MCC);
4573 adapter->stats.latecol += er32(LATECOL);
4574 adapter->stats.dc += er32(DC);
4576 hw->mac.collision_delta = er32(COLC);
4578 if ((hw->mac.type != e1000_82574) &&
4579 (hw->mac.type != e1000_82583))
4580 adapter->stats.tncrs += er32(TNCRS);
4582 adapter->stats.colc += hw->mac.collision_delta;
4585 adapter->stats.xonrxc += er32(XONRXC);
4586 adapter->stats.xontxc += er32(XONTXC);
4587 adapter->stats.xoffrxc += er32(XOFFRXC);
4588 adapter->stats.xofftxc += er32(XOFFTXC);
4589 adapter->stats.gptc += er32(GPTC);
4590 adapter->stats.gotc += er32(GOTCL);
4591 er32(GOTCH); /* Clear gotc */
4592 adapter->stats.rnbc += er32(RNBC);
4593 adapter->stats.ruc += er32(RUC);
4595 adapter->stats.mptc += er32(MPTC);
4596 adapter->stats.bptc += er32(BPTC);
4598 /* used for adaptive IFS */
4600 hw->mac.tx_packet_delta = er32(TPT);
4601 adapter->stats.tpt += hw->mac.tx_packet_delta;
4603 adapter->stats.algnerrc += er32(ALGNERRC);
4604 adapter->stats.rxerrc += er32(RXERRC);
4605 adapter->stats.cexterr += er32(CEXTERR);
4606 adapter->stats.tsctc += er32(TSCTC);
4607 adapter->stats.tsctfc += er32(TSCTFC);
4609 /* Fill out the OS statistics structure */
4610 netdev->stats.multicast = adapter->stats.mprc;
4611 netdev->stats.collisions = adapter->stats.colc;
4615 /* RLEC on some newer hardware can be incorrect so build
4616 * our own version based on RUC and ROC
4618 netdev->stats.rx_errors = adapter->stats.rxerrc +
4619 adapter->stats.crcerrs + adapter->stats.algnerrc +
4620 adapter->stats.ruc + adapter->stats.roc +
4621 adapter->stats.cexterr;
4622 netdev->stats.rx_length_errors = adapter->stats.ruc +
4624 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
4625 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
4626 netdev->stats.rx_missed_errors = adapter->stats.mpc;
4629 netdev->stats.tx_errors = adapter->stats.ecol +
4630 adapter->stats.latecol;
4631 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
4632 netdev->stats.tx_window_errors = adapter->stats.latecol;
4633 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
4635 /* Tx Dropped needs to be maintained elsewhere */
4637 /* Management Stats */
4638 adapter->stats.mgptc += er32(MGTPTC);
4639 adapter->stats.mgprc += er32(MGTPRC);
4640 adapter->stats.mgpdc += er32(MGTPDC);
4642 /* Correctable ECC Errors */
4643 if (hw->mac.type == e1000_pch_lpt) {
4644 u32 pbeccsts = er32(PBECCSTS);
4645 adapter->corr_errors +=
4646 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
4647 adapter->uncorr_errors +=
4648 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
4649 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
4654 * e1000_phy_read_status - Update the PHY register status snapshot
4655 * @adapter: board private structure
4657 static void e1000_phy_read_status(struct e1000_adapter *adapter)
4659 struct e1000_hw *hw = &adapter->hw;
4660 struct e1000_phy_regs *phy = &adapter->phy_regs;
4662 if ((er32(STATUS) & E1000_STATUS_LU) &&
4663 (adapter->hw.phy.media_type == e1000_media_type_copper)) {
4666 pm_runtime_get_sync(&adapter->pdev->dev);
4667 ret_val = e1e_rphy(hw, MII_BMCR, &phy->bmcr);
4668 ret_val |= e1e_rphy(hw, MII_BMSR, &phy->bmsr);
4669 ret_val |= e1e_rphy(hw, MII_ADVERTISE, &phy->advertise);
4670 ret_val |= e1e_rphy(hw, MII_LPA, &phy->lpa);
4671 ret_val |= e1e_rphy(hw, MII_EXPANSION, &phy->expansion);
4672 ret_val |= e1e_rphy(hw, MII_CTRL1000, &phy->ctrl1000);
4673 ret_val |= e1e_rphy(hw, MII_STAT1000, &phy->stat1000);
4674 ret_val |= e1e_rphy(hw, MII_ESTATUS, &phy->estatus);
4676 e_warn("Error reading PHY register\n");
4677 pm_runtime_put_sync(&adapter->pdev->dev);
4679 /* Do not read PHY registers if link is not up
4680 * Set values to typical power-on defaults
4682 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX);
4683 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL |
4684 BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE |
4686 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP |
4687 ADVERTISE_ALL | ADVERTISE_CSMA);
4689 phy->expansion = EXPANSION_ENABLENPAGE;
4690 phy->ctrl1000 = ADVERTISE_1000FULL;
4692 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
4696 static void e1000_print_link_info(struct e1000_adapter *adapter)
4698 struct e1000_hw *hw = &adapter->hw;
4699 u32 ctrl = er32(CTRL);
4701 /* Link status message must follow this format for user tools */
4702 pr_info("%s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n",
4703 adapter->netdev->name, adapter->link_speed,
4704 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half",
4705 (ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE) ? "Rx/Tx" :
4706 (ctrl & E1000_CTRL_RFCE) ? "Rx" :
4707 (ctrl & E1000_CTRL_TFCE) ? "Tx" : "None");
4710 static bool e1000e_has_link(struct e1000_adapter *adapter)
4712 struct e1000_hw *hw = &adapter->hw;
4713 bool link_active = false;
4716 /* get_link_status is set on LSC (link status) interrupt or
4717 * Rx sequence error interrupt. get_link_status will stay
4718 * false until the check_for_link establishes link
4719 * for copper adapters ONLY
4721 switch (hw->phy.media_type) {
4722 case e1000_media_type_copper:
4723 if (hw->mac.get_link_status) {
4724 ret_val = hw->mac.ops.check_for_link(hw);
4725 link_active = !hw->mac.get_link_status;
4730 case e1000_media_type_fiber:
4731 ret_val = hw->mac.ops.check_for_link(hw);
4732 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
4734 case e1000_media_type_internal_serdes:
4735 ret_val = hw->mac.ops.check_for_link(hw);
4736 link_active = adapter->hw.mac.serdes_has_link;
4739 case e1000_media_type_unknown:
4743 if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
4744 (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
4745 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
4746 e_info("Gigabit has been disabled, downgrading speed\n");
4752 static void e1000e_enable_receives(struct e1000_adapter *adapter)
4754 /* make sure the receive unit is started */
4755 if ((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
4756 (adapter->flags & FLAG_RESTART_NOW)) {
4757 struct e1000_hw *hw = &adapter->hw;
4758 u32 rctl = er32(RCTL);
4759 ew32(RCTL, rctl | E1000_RCTL_EN);
4760 adapter->flags &= ~FLAG_RESTART_NOW;
4764 static void e1000e_check_82574_phy_workaround(struct e1000_adapter *adapter)
4766 struct e1000_hw *hw = &adapter->hw;
4768 /* With 82574 controllers, PHY needs to be checked periodically
4769 * for hung state and reset, if two calls return true
4771 if (e1000_check_phy_82574(hw))
4772 adapter->phy_hang_count++;
4774 adapter->phy_hang_count = 0;
4776 if (adapter->phy_hang_count > 1) {
4777 adapter->phy_hang_count = 0;
4778 schedule_work(&adapter->reset_task);
4783 * e1000_watchdog - Timer Call-back
4784 * @data: pointer to adapter cast into an unsigned long
4786 static void e1000_watchdog(unsigned long data)
4788 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
4790 /* Do the rest outside of interrupt context */
4791 schedule_work(&adapter->watchdog_task);
4793 /* TODO: make this use queue_delayed_work() */
4796 static void e1000_watchdog_task(struct work_struct *work)
4798 struct e1000_adapter *adapter = container_of(work,
4799 struct e1000_adapter, watchdog_task);
4800 struct net_device *netdev = adapter->netdev;
4801 struct e1000_mac_info *mac = &adapter->hw.mac;
4802 struct e1000_phy_info *phy = &adapter->hw.phy;
4803 struct e1000_ring *tx_ring = adapter->tx_ring;
4804 struct e1000_hw *hw = &adapter->hw;
4807 if (test_bit(__E1000_DOWN, &adapter->state))
4810 link = e1000e_has_link(adapter);
4811 if ((netif_carrier_ok(netdev)) && link) {
4812 /* Cancel scheduled suspend requests. */
4813 pm_runtime_resume(netdev->dev.parent);
4815 e1000e_enable_receives(adapter);
4819 if ((e1000e_enable_tx_pkt_filtering(hw)) &&
4820 (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
4821 e1000_update_mng_vlan(adapter);
4824 if (!netif_carrier_ok(netdev)) {
4827 /* Cancel scheduled suspend requests. */
4828 pm_runtime_resume(netdev->dev.parent);
4830 /* update snapshot of PHY registers on LSC */
4831 e1000_phy_read_status(adapter);
4832 mac->ops.get_link_up_info(&adapter->hw,
4833 &adapter->link_speed,
4834 &adapter->link_duplex);
4835 e1000_print_link_info(adapter);
4837 /* check if SmartSpeed worked */
4838 e1000e_check_downshift(hw);
4839 if (phy->speed_downgraded)
4841 "Link Speed was downgraded by SmartSpeed\n");
4843 /* On supported PHYs, check for duplex mismatch only
4844 * if link has autonegotiated at 10/100 half
4846 if ((hw->phy.type == e1000_phy_igp_3 ||
4847 hw->phy.type == e1000_phy_bm) &&
4848 (hw->mac.autoneg == true) &&
4849 (adapter->link_speed == SPEED_10 ||
4850 adapter->link_speed == SPEED_100) &&
4851 (adapter->link_duplex == HALF_DUPLEX)) {
4854 e1e_rphy(hw, MII_EXPANSION, &autoneg_exp);
4856 if (!(autoneg_exp & EXPANSION_NWAY))
4857 e_info("Autonegotiated half duplex but link partner cannot autoneg. Try forcing full duplex if link gets many collisions.\n");
4860 /* adjust timeout factor according to speed/duplex */
4861 adapter->tx_timeout_factor = 1;
4862 switch (adapter->link_speed) {
4865 adapter->tx_timeout_factor = 16;
4869 adapter->tx_timeout_factor = 10;
4873 /* workaround: re-program speed mode bit after
4876 if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
4879 tarc0 = er32(TARC(0));
4880 tarc0 &= ~SPEED_MODE_BIT;
4881 ew32(TARC(0), tarc0);
4884 /* disable TSO for pcie and 10/100 speeds, to avoid
4885 * some hardware issues
4887 if (!(adapter->flags & FLAG_TSO_FORCE)) {
4888 switch (adapter->link_speed) {
4891 e_info("10/100 speed: disabling TSO\n");
4892 netdev->features &= ~NETIF_F_TSO;
4893 netdev->features &= ~NETIF_F_TSO6;
4896 netdev->features |= NETIF_F_TSO;
4897 netdev->features |= NETIF_F_TSO6;
4905 /* enable transmits in the hardware, need to do this
4906 * after setting TARC(0)
4909 tctl |= E1000_TCTL_EN;
4912 /* Perform any post-link-up configuration before
4913 * reporting link up.
4915 if (phy->ops.cfg_on_link_up)
4916 phy->ops.cfg_on_link_up(hw);
4918 netif_carrier_on(netdev);
4920 if (!test_bit(__E1000_DOWN, &adapter->state))
4921 mod_timer(&adapter->phy_info_timer,
4922 round_jiffies(jiffies + 2 * HZ));
4925 if (netif_carrier_ok(netdev)) {
4926 adapter->link_speed = 0;
4927 adapter->link_duplex = 0;
4928 /* Link status message must follow this format */
4929 pr_info("%s NIC Link is Down\n", adapter->netdev->name);
4930 netif_carrier_off(netdev);
4931 if (!test_bit(__E1000_DOWN, &adapter->state))
4932 mod_timer(&adapter->phy_info_timer,
4933 round_jiffies(jiffies + 2 * HZ));
4935 /* The link is lost so the controller stops DMA.
4936 * If there is queued Tx work that cannot be done
4937 * or if on an 8000ES2LAN which requires a Rx packet
4938 * buffer work-around on link down event, reset the
4939 * controller to flush the Tx/Rx packet buffers.
4940 * (Do the reset outside of interrupt context).
4942 if ((adapter->flags & FLAG_RX_NEEDS_RESTART) ||
4943 (e1000_desc_unused(tx_ring) + 1 < tx_ring->count))
4944 adapter->flags |= FLAG_RESTART_NOW;
4946 pm_schedule_suspend(netdev->dev.parent,
4952 spin_lock(&adapter->stats64_lock);
4953 e1000e_update_stats(adapter);
4955 mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
4956 adapter->tpt_old = adapter->stats.tpt;
4957 mac->collision_delta = adapter->stats.colc - adapter->colc_old;
4958 adapter->colc_old = adapter->stats.colc;
4960 adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
4961 adapter->gorc_old = adapter->stats.gorc;
4962 adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
4963 adapter->gotc_old = adapter->stats.gotc;
4964 spin_unlock(&adapter->stats64_lock);
4966 if (adapter->flags & FLAG_RESTART_NOW) {
4967 schedule_work(&adapter->reset_task);
4968 /* return immediately since reset is imminent */
4972 e1000e_update_adaptive(&adapter->hw);
4974 /* Simple mode for Interrupt Throttle Rate (ITR) */
4975 if (adapter->itr_setting == 4) {
4976 /* Symmetric Tx/Rx gets a reduced ITR=2000;
4977 * Total asymmetrical Tx or Rx gets ITR=8000;
4978 * everyone else is between 2000-8000.
4980 u32 goc = (adapter->gotc + adapter->gorc) / 10000;
4981 u32 dif = (adapter->gotc > adapter->gorc ?
4982 adapter->gotc - adapter->gorc :
4983 adapter->gorc - adapter->gotc) / 10000;
4984 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
4986 e1000e_write_itr(adapter, itr);
4989 /* Cause software interrupt to ensure Rx ring is cleaned */
4990 if (adapter->msix_entries)
4991 ew32(ICS, adapter->rx_ring->ims_val);
4993 ew32(ICS, E1000_ICS_RXDMT0);
4995 /* flush pending descriptors to memory before detecting Tx hang */
4996 e1000e_flush_descriptors(adapter);
4998 /* Force detection of hung controller every watchdog period */
4999 adapter->detect_tx_hung = true;
5001 /* With 82571 controllers, LAA may be overwritten due to controller
5002 * reset from the other port. Set the appropriate LAA in RAR[0]
5004 if (e1000e_get_laa_state_82571(hw))
5005 hw->mac.ops.rar_set(hw, adapter->hw.mac.addr, 0);
5007 if (adapter->flags2 & FLAG2_CHECK_PHY_HANG)
5008 e1000e_check_82574_phy_workaround(adapter);
5010 /* Clear valid timestamp stuck in RXSTMPL/H due to a Rx error */
5011 if (adapter->hwtstamp_config.rx_filter != HWTSTAMP_FILTER_NONE) {
5012 if ((adapter->flags2 & FLAG2_CHECK_RX_HWTSTAMP) &&
5013 (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID)) {
5015 adapter->rx_hwtstamp_cleared++;
5017 adapter->flags2 |= FLAG2_CHECK_RX_HWTSTAMP;
5021 /* Reset the timer */
5022 if (!test_bit(__E1000_DOWN, &adapter->state))
5023 mod_timer(&adapter->watchdog_timer,
5024 round_jiffies(jiffies + 2 * HZ));
5027 #define E1000_TX_FLAGS_CSUM 0x00000001
5028 #define E1000_TX_FLAGS_VLAN 0x00000002
5029 #define E1000_TX_FLAGS_TSO 0x00000004
5030 #define E1000_TX_FLAGS_IPV4 0x00000008
5031 #define E1000_TX_FLAGS_NO_FCS 0x00000010
5032 #define E1000_TX_FLAGS_HWTSTAMP 0x00000020
5033 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
5034 #define E1000_TX_FLAGS_VLAN_SHIFT 16
5036 static int e1000_tso(struct e1000_ring *tx_ring, struct sk_buff *skb)
5038 struct e1000_context_desc *context_desc;
5039 struct e1000_buffer *buffer_info;
5043 u8 ipcss, ipcso, tucss, tucso, hdr_len;
5045 if (!skb_is_gso(skb))
5048 if (skb_header_cloned(skb)) {
5049 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
5055 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
5056 mss = skb_shinfo(skb)->gso_size;
5057 if (skb->protocol == htons(ETH_P_IP)) {
5058 struct iphdr *iph = ip_hdr(skb);
5061 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
5063 cmd_length = E1000_TXD_CMD_IP;
5064 ipcse = skb_transport_offset(skb) - 1;
5065 } else if (skb_is_gso_v6(skb)) {
5066 ipv6_hdr(skb)->payload_len = 0;
5067 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
5068 &ipv6_hdr(skb)->daddr,
5072 ipcss = skb_network_offset(skb);
5073 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
5074 tucss = skb_transport_offset(skb);
5075 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
5077 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
5078 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
5080 i = tx_ring->next_to_use;
5081 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
5082 buffer_info = &tx_ring->buffer_info[i];
5084 context_desc->lower_setup.ip_fields.ipcss = ipcss;
5085 context_desc->lower_setup.ip_fields.ipcso = ipcso;
5086 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
5087 context_desc->upper_setup.tcp_fields.tucss = tucss;
5088 context_desc->upper_setup.tcp_fields.tucso = tucso;
5089 context_desc->upper_setup.tcp_fields.tucse = 0;
5090 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
5091 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
5092 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
5094 buffer_info->time_stamp = jiffies;
5095 buffer_info->next_to_watch = i;
5098 if (i == tx_ring->count)
5100 tx_ring->next_to_use = i;
5105 static bool e1000_tx_csum(struct e1000_ring *tx_ring, struct sk_buff *skb)
5107 struct e1000_adapter *adapter = tx_ring->adapter;
5108 struct e1000_context_desc *context_desc;
5109 struct e1000_buffer *buffer_info;
5112 u32 cmd_len = E1000_TXD_CMD_DEXT;
5115 if (skb->ip_summed != CHECKSUM_PARTIAL)
5118 if (skb->protocol == cpu_to_be16(ETH_P_8021Q))
5119 protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
5121 protocol = skb->protocol;
5124 case cpu_to_be16(ETH_P_IP):
5125 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
5126 cmd_len |= E1000_TXD_CMD_TCP;
5128 case cpu_to_be16(ETH_P_IPV6):
5129 /* XXX not handling all IPV6 headers */
5130 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
5131 cmd_len |= E1000_TXD_CMD_TCP;
5134 if (unlikely(net_ratelimit()))
5135 e_warn("checksum_partial proto=%x!\n",
5136 be16_to_cpu(protocol));
5140 css = skb_checksum_start_offset(skb);
5142 i = tx_ring->next_to_use;
5143 buffer_info = &tx_ring->buffer_info[i];
5144 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
5146 context_desc->lower_setup.ip_config = 0;
5147 context_desc->upper_setup.tcp_fields.tucss = css;
5148 context_desc->upper_setup.tcp_fields.tucso =
5149 css + skb->csum_offset;
5150 context_desc->upper_setup.tcp_fields.tucse = 0;
5151 context_desc->tcp_seg_setup.data = 0;
5152 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
5154 buffer_info->time_stamp = jiffies;
5155 buffer_info->next_to_watch = i;
5158 if (i == tx_ring->count)
5160 tx_ring->next_to_use = i;
5165 static int e1000_tx_map(struct e1000_ring *tx_ring, struct sk_buff *skb,
5166 unsigned int first, unsigned int max_per_txd,
5167 unsigned int nr_frags)
5169 struct e1000_adapter *adapter = tx_ring->adapter;
5170 struct pci_dev *pdev = adapter->pdev;
5171 struct e1000_buffer *buffer_info;
5172 unsigned int len = skb_headlen(skb);
5173 unsigned int offset = 0, size, count = 0, i;
5174 unsigned int f, bytecount, segs;
5176 i = tx_ring->next_to_use;
5179 buffer_info = &tx_ring->buffer_info[i];
5180 size = min(len, max_per_txd);
5182 buffer_info->length = size;
5183 buffer_info->time_stamp = jiffies;
5184 buffer_info->next_to_watch = i;
5185 buffer_info->dma = dma_map_single(&pdev->dev,
5187 size, DMA_TO_DEVICE);
5188 buffer_info->mapped_as_page = false;
5189 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
5198 if (i == tx_ring->count)
5203 for (f = 0; f < nr_frags; f++) {
5204 const struct skb_frag_struct *frag;
5206 frag = &skb_shinfo(skb)->frags[f];
5207 len = skb_frag_size(frag);
5212 if (i == tx_ring->count)
5215 buffer_info = &tx_ring->buffer_info[i];
5216 size = min(len, max_per_txd);
5218 buffer_info->length = size;
5219 buffer_info->time_stamp = jiffies;
5220 buffer_info->next_to_watch = i;
5221 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
5222 offset, size, DMA_TO_DEVICE);
5223 buffer_info->mapped_as_page = true;
5224 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
5233 segs = skb_shinfo(skb)->gso_segs ? : 1;
5234 /* multiply data chunks by size of headers */
5235 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
5237 tx_ring->buffer_info[i].skb = skb;
5238 tx_ring->buffer_info[i].segs = segs;
5239 tx_ring->buffer_info[i].bytecount = bytecount;
5240 tx_ring->buffer_info[first].next_to_watch = i;
5245 dev_err(&pdev->dev, "Tx DMA map failed\n");
5246 buffer_info->dma = 0;
5252 i += tx_ring->count;
5254 buffer_info = &tx_ring->buffer_info[i];
5255 e1000_put_txbuf(tx_ring, buffer_info);
5261 static void e1000_tx_queue(struct e1000_ring *tx_ring, int tx_flags, int count)
5263 struct e1000_adapter *adapter = tx_ring->adapter;
5264 struct e1000_tx_desc *tx_desc = NULL;
5265 struct e1000_buffer *buffer_info;
5266 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
5269 if (tx_flags & E1000_TX_FLAGS_TSO) {
5270 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
5272 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
5274 if (tx_flags & E1000_TX_FLAGS_IPV4)
5275 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
5278 if (tx_flags & E1000_TX_FLAGS_CSUM) {
5279 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
5280 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
5283 if (tx_flags & E1000_TX_FLAGS_VLAN) {
5284 txd_lower |= E1000_TXD_CMD_VLE;
5285 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
5288 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
5289 txd_lower &= ~(E1000_TXD_CMD_IFCS);
5291 if (unlikely(tx_flags & E1000_TX_FLAGS_HWTSTAMP)) {
5292 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
5293 txd_upper |= E1000_TXD_EXTCMD_TSTAMP;
5296 i = tx_ring->next_to_use;
5299 buffer_info = &tx_ring->buffer_info[i];
5300 tx_desc = E1000_TX_DESC(*tx_ring, i);
5301 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
5302 tx_desc->lower.data =
5303 cpu_to_le32(txd_lower | buffer_info->length);
5304 tx_desc->upper.data = cpu_to_le32(txd_upper);
5307 if (i == tx_ring->count)
5309 } while (--count > 0);
5311 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
5313 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
5314 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
5315 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
5317 /* Force memory writes to complete before letting h/w
5318 * know there are new descriptors to fetch. (Only
5319 * applicable for weak-ordered memory model archs,
5324 tx_ring->next_to_use = i;
5326 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
5327 e1000e_update_tdt_wa(tx_ring, i);
5329 writel(i, tx_ring->tail);
5331 /* we need this if more than one processor can write to our tail
5332 * at a time, it synchronizes IO on IA64/Altix systems
5337 #define MINIMUM_DHCP_PACKET_SIZE 282
5338 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
5339 struct sk_buff *skb)
5341 struct e1000_hw *hw = &adapter->hw;
5344 if (vlan_tx_tag_present(skb) &&
5345 !((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
5346 (adapter->hw.mng_cookie.status &
5347 E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
5350 if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
5353 if (((struct ethhdr *) skb->data)->h_proto != htons(ETH_P_IP))
5357 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data+14);
5360 if (ip->protocol != IPPROTO_UDP)
5363 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
5364 if (ntohs(udp->dest) != 67)
5367 offset = (u8 *)udp + 8 - skb->data;
5368 length = skb->len - offset;
5369 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
5375 static int __e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
5377 struct e1000_adapter *adapter = tx_ring->adapter;
5379 netif_stop_queue(adapter->netdev);
5380 /* Herbert's original patch had:
5381 * smp_mb__after_netif_stop_queue();
5382 * but since that doesn't exist yet, just open code it.
5386 /* We need to check again in a case another CPU has just
5387 * made room available.
5389 if (e1000_desc_unused(tx_ring) < size)
5393 netif_start_queue(adapter->netdev);
5394 ++adapter->restart_queue;
5398 static int e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
5400 BUG_ON(size > tx_ring->count);
5402 if (e1000_desc_unused(tx_ring) >= size)
5404 return __e1000_maybe_stop_tx(tx_ring, size);
5407 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
5408 struct net_device *netdev)
5410 struct e1000_adapter *adapter = netdev_priv(netdev);
5411 struct e1000_ring *tx_ring = adapter->tx_ring;
5413 unsigned int tx_flags = 0;
5414 unsigned int len = skb_headlen(skb);
5415 unsigned int nr_frags;
5421 if (test_bit(__E1000_DOWN, &adapter->state)) {
5422 dev_kfree_skb_any(skb);
5423 return NETDEV_TX_OK;
5426 if (skb->len <= 0) {
5427 dev_kfree_skb_any(skb);
5428 return NETDEV_TX_OK;
5431 /* The minimum packet size with TCTL.PSP set is 17 bytes so
5432 * pad skb in order to meet this minimum size requirement
5434 if (unlikely(skb->len < 17)) {
5435 if (skb_pad(skb, 17 - skb->len))
5436 return NETDEV_TX_OK;
5438 skb_set_tail_pointer(skb, 17);
5441 mss = skb_shinfo(skb)->gso_size;
5445 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
5446 * points to just header, pull a few bytes of payload from
5447 * frags into skb->data
5449 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
5450 /* we do this workaround for ES2LAN, but it is un-necessary,
5451 * avoiding it could save a lot of cycles
5453 if (skb->data_len && (hdr_len == len)) {
5454 unsigned int pull_size;
5456 pull_size = min_t(unsigned int, 4, skb->data_len);
5457 if (!__pskb_pull_tail(skb, pull_size)) {
5458 e_err("__pskb_pull_tail failed.\n");
5459 dev_kfree_skb_any(skb);
5460 return NETDEV_TX_OK;
5462 len = skb_headlen(skb);
5466 /* reserve a descriptor for the offload context */
5467 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
5471 count += DIV_ROUND_UP(len, adapter->tx_fifo_limit);
5473 nr_frags = skb_shinfo(skb)->nr_frags;
5474 for (f = 0; f < nr_frags; f++)
5475 count += DIV_ROUND_UP(skb_frag_size(&skb_shinfo(skb)->frags[f]),
5476 adapter->tx_fifo_limit);
5478 if (adapter->hw.mac.tx_pkt_filtering)
5479 e1000_transfer_dhcp_info(adapter, skb);
5481 /* need: count + 2 desc gap to keep tail from touching
5482 * head, otherwise try next time
5484 if (e1000_maybe_stop_tx(tx_ring, count + 2))
5485 return NETDEV_TX_BUSY;
5487 if (vlan_tx_tag_present(skb)) {
5488 tx_flags |= E1000_TX_FLAGS_VLAN;
5489 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
5492 first = tx_ring->next_to_use;
5494 tso = e1000_tso(tx_ring, skb);
5496 dev_kfree_skb_any(skb);
5497 return NETDEV_TX_OK;
5501 tx_flags |= E1000_TX_FLAGS_TSO;
5502 else if (e1000_tx_csum(tx_ring, skb))
5503 tx_flags |= E1000_TX_FLAGS_CSUM;
5505 /* Old method was to assume IPv4 packet by default if TSO was enabled.
5506 * 82571 hardware supports TSO capabilities for IPv6 as well...
5507 * no longer assume, we must.
5509 if (skb->protocol == htons(ETH_P_IP))
5510 tx_flags |= E1000_TX_FLAGS_IPV4;
5512 if (unlikely(skb->no_fcs))
5513 tx_flags |= E1000_TX_FLAGS_NO_FCS;
5515 /* if count is 0 then mapping error has occurred */
5516 count = e1000_tx_map(tx_ring, skb, first, adapter->tx_fifo_limit,
5519 if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
5520 !adapter->tx_hwtstamp_skb)) {
5521 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
5522 tx_flags |= E1000_TX_FLAGS_HWTSTAMP;
5523 adapter->tx_hwtstamp_skb = skb_get(skb);
5524 schedule_work(&adapter->tx_hwtstamp_work);
5526 skb_tx_timestamp(skb);
5529 netdev_sent_queue(netdev, skb->len);
5530 e1000_tx_queue(tx_ring, tx_flags, count);
5531 /* Make sure there is space in the ring for the next send. */
5532 e1000_maybe_stop_tx(tx_ring,
5534 DIV_ROUND_UP(PAGE_SIZE,
5535 adapter->tx_fifo_limit) + 2));
5537 dev_kfree_skb_any(skb);
5538 tx_ring->buffer_info[first].time_stamp = 0;
5539 tx_ring->next_to_use = first;
5542 return NETDEV_TX_OK;
5546 * e1000_tx_timeout - Respond to a Tx Hang
5547 * @netdev: network interface device structure
5549 static void e1000_tx_timeout(struct net_device *netdev)
5551 struct e1000_adapter *adapter = netdev_priv(netdev);
5553 /* Do the reset outside of interrupt context */
5554 adapter->tx_timeout_count++;
5555 schedule_work(&adapter->reset_task);
5558 static void e1000_reset_task(struct work_struct *work)
5560 struct e1000_adapter *adapter;
5561 adapter = container_of(work, struct e1000_adapter, reset_task);
5563 /* don't run the task if already down */
5564 if (test_bit(__E1000_DOWN, &adapter->state))
5567 if (!(adapter->flags & FLAG_RESTART_NOW)) {
5568 e1000e_dump(adapter);
5569 e_err("Reset adapter unexpectedly\n");
5571 e1000e_reinit_locked(adapter);
5575 * e1000_get_stats64 - Get System Network Statistics
5576 * @netdev: network interface device structure
5577 * @stats: rtnl_link_stats64 pointer
5579 * Returns the address of the device statistics structure.
5581 struct rtnl_link_stats64 *e1000e_get_stats64(struct net_device *netdev,
5582 struct rtnl_link_stats64 *stats)
5584 struct e1000_adapter *adapter = netdev_priv(netdev);
5586 memset(stats, 0, sizeof(struct rtnl_link_stats64));
5587 spin_lock(&adapter->stats64_lock);
5588 e1000e_update_stats(adapter);
5589 /* Fill out the OS statistics structure */
5590 stats->rx_bytes = adapter->stats.gorc;
5591 stats->rx_packets = adapter->stats.gprc;
5592 stats->tx_bytes = adapter->stats.gotc;
5593 stats->tx_packets = adapter->stats.gptc;
5594 stats->multicast = adapter->stats.mprc;
5595 stats->collisions = adapter->stats.colc;
5599 /* RLEC on some newer hardware can be incorrect so build
5600 * our own version based on RUC and ROC
5602 stats->rx_errors = adapter->stats.rxerrc +
5603 adapter->stats.crcerrs + adapter->stats.algnerrc +
5604 adapter->stats.ruc + adapter->stats.roc +
5605 adapter->stats.cexterr;
5606 stats->rx_length_errors = adapter->stats.ruc +
5608 stats->rx_crc_errors = adapter->stats.crcerrs;
5609 stats->rx_frame_errors = adapter->stats.algnerrc;
5610 stats->rx_missed_errors = adapter->stats.mpc;
5613 stats->tx_errors = adapter->stats.ecol +
5614 adapter->stats.latecol;
5615 stats->tx_aborted_errors = adapter->stats.ecol;
5616 stats->tx_window_errors = adapter->stats.latecol;
5617 stats->tx_carrier_errors = adapter->stats.tncrs;
5619 /* Tx Dropped needs to be maintained elsewhere */
5621 spin_unlock(&adapter->stats64_lock);
5626 * e1000_change_mtu - Change the Maximum Transfer Unit
5627 * @netdev: network interface device structure
5628 * @new_mtu: new value for maximum frame size
5630 * Returns 0 on success, negative on failure
5632 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
5634 struct e1000_adapter *adapter = netdev_priv(netdev);
5635 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5637 /* Jumbo frame support */
5638 if ((max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) &&
5639 !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
5640 e_err("Jumbo Frames not supported.\n");
5644 /* Supported frame sizes */
5645 if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
5646 (max_frame > adapter->max_hw_frame_size)) {
5647 e_err("Unsupported MTU setting\n");
5651 /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */
5652 if ((adapter->hw.mac.type >= e1000_pch2lan) &&
5653 !(adapter->flags2 & FLAG2_CRC_STRIPPING) &&
5654 (new_mtu > ETH_DATA_LEN)) {
5655 e_err("Jumbo Frames not supported on this device when CRC stripping is disabled.\n");
5659 while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
5660 usleep_range(1000, 2000);
5661 /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
5662 adapter->max_frame_size = max_frame;
5663 e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5664 netdev->mtu = new_mtu;
5665 if (netif_running(netdev))
5666 e1000e_down(adapter);
5668 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
5669 * means we reserve 2 more, this pushes us to allocate from the next
5671 * i.e. RXBUFFER_2048 --> size-4096 slab
5672 * However with the new *_jumbo_rx* routines, jumbo receives will use
5676 if (max_frame <= 2048)
5677 adapter->rx_buffer_len = 2048;
5679 adapter->rx_buffer_len = 4096;
5681 /* adjust allocation if LPE protects us, and we aren't using SBP */
5682 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
5683 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
5684 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
5687 if (netif_running(netdev))
5690 e1000e_reset(adapter);
5692 clear_bit(__E1000_RESETTING, &adapter->state);
5697 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
5700 struct e1000_adapter *adapter = netdev_priv(netdev);
5701 struct mii_ioctl_data *data = if_mii(ifr);
5703 if (adapter->hw.phy.media_type != e1000_media_type_copper)
5708 data->phy_id = adapter->hw.phy.addr;
5711 e1000_phy_read_status(adapter);
5713 switch (data->reg_num & 0x1F) {
5715 data->val_out = adapter->phy_regs.bmcr;
5718 data->val_out = adapter->phy_regs.bmsr;
5721 data->val_out = (adapter->hw.phy.id >> 16);
5724 data->val_out = (adapter->hw.phy.id & 0xFFFF);
5727 data->val_out = adapter->phy_regs.advertise;
5730 data->val_out = adapter->phy_regs.lpa;
5733 data->val_out = adapter->phy_regs.expansion;
5736 data->val_out = adapter->phy_regs.ctrl1000;
5739 data->val_out = adapter->phy_regs.stat1000;
5742 data->val_out = adapter->phy_regs.estatus;
5756 * e1000e_hwtstamp_ioctl - control hardware time stamping
5757 * @netdev: network interface device structure
5758 * @ifreq: interface request
5760 * Outgoing time stamping can be enabled and disabled. Play nice and
5761 * disable it when requested, although it shouldn't cause any overhead
5762 * when no packet needs it. At most one packet in the queue may be
5763 * marked for time stamping, otherwise it would be impossible to tell
5764 * for sure to which packet the hardware time stamp belongs.
5766 * Incoming time stamping has to be configured via the hardware filters.
5767 * Not all combinations are supported, in particular event type has to be
5768 * specified. Matching the kind of event packet is not supported, with the
5769 * exception of "all V2 events regardless of level 2 or 4".
5771 static int e1000e_hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
5773 struct e1000_adapter *adapter = netdev_priv(netdev);
5774 struct hwtstamp_config config;
5777 if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
5780 adapter->hwtstamp_config = config;
5782 ret_val = e1000e_config_hwtstamp(adapter);
5786 config = adapter->hwtstamp_config;
5788 switch (config.rx_filter) {
5789 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
5790 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
5791 case HWTSTAMP_FILTER_PTP_V2_SYNC:
5792 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
5793 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
5794 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
5795 /* With V2 type filters which specify a Sync or Delay Request,
5796 * Path Delay Request/Response messages are also time stamped
5797 * by hardware so notify the caller the requested packets plus
5798 * some others are time stamped.
5800 config.rx_filter = HWTSTAMP_FILTER_SOME;
5806 return copy_to_user(ifr->ifr_data, &config,
5807 sizeof(config)) ? -EFAULT : 0;
5810 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
5816 return e1000_mii_ioctl(netdev, ifr, cmd);
5818 return e1000e_hwtstamp_ioctl(netdev, ifr);
5824 static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc)
5826 struct e1000_hw *hw = &adapter->hw;
5828 u16 phy_reg, wuc_enable;
5831 /* copy MAC RARs to PHY RARs */
5832 e1000_copy_rx_addrs_to_phy_ich8lan(hw);
5834 retval = hw->phy.ops.acquire(hw);
5836 e_err("Could not acquire PHY\n");
5840 /* Enable access to wakeup registers on and set page to BM_WUC_PAGE */
5841 retval = e1000_enable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
5845 /* copy MAC MTA to PHY MTA - only needed for pchlan */
5846 for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) {
5847 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i);
5848 hw->phy.ops.write_reg_page(hw, BM_MTA(i),
5849 (u16)(mac_reg & 0xFFFF));
5850 hw->phy.ops.write_reg_page(hw, BM_MTA(i) + 1,
5851 (u16)((mac_reg >> 16) & 0xFFFF));
5854 /* configure PHY Rx Control register */
5855 hw->phy.ops.read_reg_page(&adapter->hw, BM_RCTL, &phy_reg);
5856 mac_reg = er32(RCTL);
5857 if (mac_reg & E1000_RCTL_UPE)
5858 phy_reg |= BM_RCTL_UPE;
5859 if (mac_reg & E1000_RCTL_MPE)
5860 phy_reg |= BM_RCTL_MPE;
5861 phy_reg &= ~(BM_RCTL_MO_MASK);
5862 if (mac_reg & E1000_RCTL_MO_3)
5863 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT)
5864 << BM_RCTL_MO_SHIFT);
5865 if (mac_reg & E1000_RCTL_BAM)
5866 phy_reg |= BM_RCTL_BAM;
5867 if (mac_reg & E1000_RCTL_PMCF)
5868 phy_reg |= BM_RCTL_PMCF;
5869 mac_reg = er32(CTRL);
5870 if (mac_reg & E1000_CTRL_RFCE)
5871 phy_reg |= BM_RCTL_RFCE;
5872 hw->phy.ops.write_reg_page(&adapter->hw, BM_RCTL, phy_reg);
5874 /* enable PHY wakeup in MAC register */
5876 ew32(WUC, E1000_WUC_PHY_WAKE | E1000_WUC_PME_EN);
5878 /* configure and enable PHY wakeup in PHY registers */
5879 hw->phy.ops.write_reg_page(&adapter->hw, BM_WUFC, wufc);
5880 hw->phy.ops.write_reg_page(&adapter->hw, BM_WUC, E1000_WUC_PME_EN);
5882 /* activate PHY wakeup */
5883 wuc_enable |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT;
5884 retval = e1000_disable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
5886 e_err("Could not set PHY Host Wakeup bit\n");
5888 hw->phy.ops.release(hw);
5893 static int __e1000_shutdown(struct pci_dev *pdev, bool runtime)
5895 struct net_device *netdev = pci_get_drvdata(pdev);
5896 struct e1000_adapter *adapter = netdev_priv(netdev);
5897 struct e1000_hw *hw = &adapter->hw;
5898 u32 ctrl, ctrl_ext, rctl, status;
5899 /* Runtime suspend should only enable wakeup for link changes */
5900 u32 wufc = runtime ? E1000_WUFC_LNKC : adapter->wol;
5903 netif_device_detach(netdev);
5905 if (netif_running(netdev)) {
5906 int count = E1000_CHECK_RESET_COUNT;
5908 while (test_bit(__E1000_RESETTING, &adapter->state) && count--)
5909 usleep_range(10000, 20000);
5911 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
5912 e1000e_down(adapter);
5913 e1000_free_irq(adapter);
5915 e1000e_reset_interrupt_capability(adapter);
5917 status = er32(STATUS);
5918 if (status & E1000_STATUS_LU)
5919 wufc &= ~E1000_WUFC_LNKC;
5922 e1000_setup_rctl(adapter);
5923 e1000e_set_rx_mode(netdev);
5925 /* turn on all-multi mode if wake on multicast is enabled */
5926 if (wufc & E1000_WUFC_MC) {
5928 rctl |= E1000_RCTL_MPE;
5933 /* advertise wake from D3Cold */
5934 #define E1000_CTRL_ADVD3WUC 0x00100000
5935 /* phy power management enable */
5936 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5937 ctrl |= E1000_CTRL_ADVD3WUC;
5938 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP))
5939 ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT;
5942 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
5943 adapter->hw.phy.media_type ==
5944 e1000_media_type_internal_serdes) {
5945 /* keep the laser running in D3 */
5946 ctrl_ext = er32(CTRL_EXT);
5947 ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA;
5948 ew32(CTRL_EXT, ctrl_ext);
5951 if (adapter->flags & FLAG_IS_ICH)
5952 e1000_suspend_workarounds_ich8lan(&adapter->hw);
5954 /* Allow time for pending master requests to run */
5955 e1000e_disable_pcie_master(&adapter->hw);
5957 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
5958 /* enable wakeup by the PHY */
5959 retval = e1000_init_phy_wakeup(adapter, wufc);
5963 /* enable wakeup by the MAC */
5965 ew32(WUC, E1000_WUC_PME_EN);
5972 if (adapter->hw.phy.type == e1000_phy_igp_3)
5973 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
5975 /* Release control of h/w to f/w. If f/w is AMT enabled, this
5976 * would have already happened in close and is redundant.
5978 e1000e_release_hw_control(adapter);
5980 pci_clear_master(pdev);
5982 /* The pci-e switch on some quad port adapters will report a
5983 * correctable error when the MAC transitions from D0 to D3. To
5984 * prevent this we need to mask off the correctable errors on the
5985 * downstream port of the pci-e switch.
5987 if (adapter->flags & FLAG_IS_QUAD_PORT) {
5988 struct pci_dev *us_dev = pdev->bus->self;
5991 pcie_capability_read_word(us_dev, PCI_EXP_DEVCTL, &devctl);
5992 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL,
5993 (devctl & ~PCI_EXP_DEVCTL_CERE));
5995 pci_save_state(pdev);
5996 pci_prepare_to_sleep(pdev);
5998 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL, devctl);
6004 #ifdef CONFIG_PCIEASPM
6005 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
6007 pci_disable_link_state_locked(pdev, state);
6010 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
6014 if (state & PCIE_LINK_STATE_L0S)
6015 aspm_ctl |= PCI_EXP_LNKCTL_ASPM_L0S;
6016 if (state & PCIE_LINK_STATE_L1)
6017 aspm_ctl |= PCI_EXP_LNKCTL_ASPM_L1;
6019 /* Both device and parent should have the same ASPM setting.
6020 * Disable ASPM in downstream component first and then upstream.
6022 pcie_capability_clear_word(pdev, PCI_EXP_LNKCTL, aspm_ctl);
6024 if (pdev->bus->self)
6025 pcie_capability_clear_word(pdev->bus->self, PCI_EXP_LNKCTL,
6029 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
6031 dev_info(&pdev->dev, "Disabling ASPM %s %s\n",
6032 (state & PCIE_LINK_STATE_L0S) ? "L0s" : "",
6033 (state & PCIE_LINK_STATE_L1) ? "L1" : "");
6035 __e1000e_disable_aspm(pdev, state);
6039 static bool e1000e_pm_ready(struct e1000_adapter *adapter)
6041 return !!adapter->tx_ring->buffer_info;
6044 static int __e1000_resume(struct pci_dev *pdev)
6046 struct net_device *netdev = pci_get_drvdata(pdev);
6047 struct e1000_adapter *adapter = netdev_priv(netdev);
6048 struct e1000_hw *hw = &adapter->hw;
6049 u16 aspm_disable_flag = 0;
6052 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
6053 aspm_disable_flag = PCIE_LINK_STATE_L0S;
6054 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
6055 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6056 if (aspm_disable_flag)
6057 e1000e_disable_aspm(pdev, aspm_disable_flag);
6059 pci_set_master(pdev);
6061 e1000e_set_interrupt_capability(adapter);
6062 if (netif_running(netdev)) {
6063 err = e1000_request_irq(adapter);
6068 if (hw->mac.type >= e1000_pch2lan)
6069 e1000_resume_workarounds_pchlan(&adapter->hw);
6071 e1000e_power_up_phy(adapter);
6073 /* report the system wakeup cause from S3/S4 */
6074 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
6077 e1e_rphy(&adapter->hw, BM_WUS, &phy_data);
6079 e_info("PHY Wakeup cause - %s\n",
6080 phy_data & E1000_WUS_EX ? "Unicast Packet" :
6081 phy_data & E1000_WUS_MC ? "Multicast Packet" :
6082 phy_data & E1000_WUS_BC ? "Broadcast Packet" :
6083 phy_data & E1000_WUS_MAG ? "Magic Packet" :
6084 phy_data & E1000_WUS_LNKC ?
6085 "Link Status Change" : "other");
6087 e1e_wphy(&adapter->hw, BM_WUS, ~0);
6089 u32 wus = er32(WUS);
6091 e_info("MAC Wakeup cause - %s\n",
6092 wus & E1000_WUS_EX ? "Unicast Packet" :
6093 wus & E1000_WUS_MC ? "Multicast Packet" :
6094 wus & E1000_WUS_BC ? "Broadcast Packet" :
6095 wus & E1000_WUS_MAG ? "Magic Packet" :
6096 wus & E1000_WUS_LNKC ? "Link Status Change" :
6102 e1000e_reset(adapter);
6104 e1000_init_manageability_pt(adapter);
6106 if (netif_running(netdev))
6109 netif_device_attach(netdev);
6111 /* If the controller has AMT, do not set DRV_LOAD until the interface
6112 * is up. For all other cases, let the f/w know that the h/w is now
6113 * under the control of the driver.
6115 if (!(adapter->flags & FLAG_HAS_AMT))
6116 e1000e_get_hw_control(adapter);
6121 #ifdef CONFIG_PM_SLEEP
6122 static int e1000_suspend(struct device *dev)
6124 struct pci_dev *pdev = to_pci_dev(dev);
6126 return __e1000_shutdown(pdev, false);
6129 static int e1000_resume(struct device *dev)
6131 struct pci_dev *pdev = to_pci_dev(dev);
6132 struct net_device *netdev = pci_get_drvdata(pdev);
6133 struct e1000_adapter *adapter = netdev_priv(netdev);
6135 if (e1000e_pm_ready(adapter))
6136 adapter->idle_check = true;
6138 return __e1000_resume(pdev);
6140 #endif /* CONFIG_PM_SLEEP */
6142 #ifdef CONFIG_PM_RUNTIME
6143 static int e1000_runtime_suspend(struct device *dev)
6145 struct pci_dev *pdev = to_pci_dev(dev);
6146 struct net_device *netdev = pci_get_drvdata(pdev);
6147 struct e1000_adapter *adapter = netdev_priv(netdev);
6149 if (!e1000e_pm_ready(adapter))
6152 return __e1000_shutdown(pdev, true);
6155 static int e1000_idle(struct device *dev)
6157 struct pci_dev *pdev = to_pci_dev(dev);
6158 struct net_device *netdev = pci_get_drvdata(pdev);
6159 struct e1000_adapter *adapter = netdev_priv(netdev);
6161 if (!e1000e_pm_ready(adapter))
6164 if (adapter->idle_check) {
6165 adapter->idle_check = false;
6166 if (!e1000e_has_link(adapter))
6167 pm_schedule_suspend(dev, MSEC_PER_SEC);
6173 static int e1000_runtime_resume(struct device *dev)
6175 struct pci_dev *pdev = to_pci_dev(dev);
6176 struct net_device *netdev = pci_get_drvdata(pdev);
6177 struct e1000_adapter *adapter = netdev_priv(netdev);
6179 if (!e1000e_pm_ready(adapter))
6182 adapter->idle_check = !dev->power.runtime_auto;
6183 return __e1000_resume(pdev);
6185 #endif /* CONFIG_PM_RUNTIME */
6186 #endif /* CONFIG_PM */
6188 static void e1000_shutdown(struct pci_dev *pdev)
6190 __e1000_shutdown(pdev, false);
6193 #ifdef CONFIG_NET_POLL_CONTROLLER
6195 static irqreturn_t e1000_intr_msix(int __always_unused irq, void *data)
6197 struct net_device *netdev = data;
6198 struct e1000_adapter *adapter = netdev_priv(netdev);
6200 if (adapter->msix_entries) {
6201 int vector, msix_irq;
6204 msix_irq = adapter->msix_entries[vector].vector;
6205 disable_irq(msix_irq);
6206 e1000_intr_msix_rx(msix_irq, netdev);
6207 enable_irq(msix_irq);
6210 msix_irq = adapter->msix_entries[vector].vector;
6211 disable_irq(msix_irq);
6212 e1000_intr_msix_tx(msix_irq, netdev);
6213 enable_irq(msix_irq);
6216 msix_irq = adapter->msix_entries[vector].vector;
6217 disable_irq(msix_irq);
6218 e1000_msix_other(msix_irq, netdev);
6219 enable_irq(msix_irq);
6227 * @netdev: network interface device structure
6229 * Polling 'interrupt' - used by things like netconsole to send skbs
6230 * without having to re-enable interrupts. It's not called while
6231 * the interrupt routine is executing.
6233 static void e1000_netpoll(struct net_device *netdev)
6235 struct e1000_adapter *adapter = netdev_priv(netdev);
6237 switch (adapter->int_mode) {
6238 case E1000E_INT_MODE_MSIX:
6239 e1000_intr_msix(adapter->pdev->irq, netdev);
6241 case E1000E_INT_MODE_MSI:
6242 disable_irq(adapter->pdev->irq);
6243 e1000_intr_msi(adapter->pdev->irq, netdev);
6244 enable_irq(adapter->pdev->irq);
6246 default: /* E1000E_INT_MODE_LEGACY */
6247 disable_irq(adapter->pdev->irq);
6248 e1000_intr(adapter->pdev->irq, netdev);
6249 enable_irq(adapter->pdev->irq);
6256 * e1000_io_error_detected - called when PCI error is detected
6257 * @pdev: Pointer to PCI device
6258 * @state: The current pci connection state
6260 * This function is called after a PCI bus error affecting
6261 * this device has been detected.
6263 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
6264 pci_channel_state_t state)
6266 struct net_device *netdev = pci_get_drvdata(pdev);
6267 struct e1000_adapter *adapter = netdev_priv(netdev);
6269 netif_device_detach(netdev);
6271 if (state == pci_channel_io_perm_failure)
6272 return PCI_ERS_RESULT_DISCONNECT;
6274 if (netif_running(netdev))
6275 e1000e_down(adapter);
6276 pci_disable_device(pdev);
6278 /* Request a slot slot reset. */
6279 return PCI_ERS_RESULT_NEED_RESET;
6283 * e1000_io_slot_reset - called after the pci bus has been reset.
6284 * @pdev: Pointer to PCI device
6286 * Restart the card from scratch, as if from a cold-boot. Implementation
6287 * resembles the first-half of the e1000_resume routine.
6289 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
6291 struct net_device *netdev = pci_get_drvdata(pdev);
6292 struct e1000_adapter *adapter = netdev_priv(netdev);
6293 struct e1000_hw *hw = &adapter->hw;
6294 u16 aspm_disable_flag = 0;
6296 pci_ers_result_t result;
6298 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
6299 aspm_disable_flag = PCIE_LINK_STATE_L0S;
6300 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
6301 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6302 if (aspm_disable_flag)
6303 e1000e_disable_aspm(pdev, aspm_disable_flag);
6305 err = pci_enable_device_mem(pdev);
6308 "Cannot re-enable PCI device after reset.\n");
6309 result = PCI_ERS_RESULT_DISCONNECT;
6311 pdev->state_saved = true;
6312 pci_restore_state(pdev);
6313 pci_set_master(pdev);
6315 pci_enable_wake(pdev, PCI_D3hot, 0);
6316 pci_enable_wake(pdev, PCI_D3cold, 0);
6318 e1000e_reset(adapter);
6320 result = PCI_ERS_RESULT_RECOVERED;
6323 pci_cleanup_aer_uncorrect_error_status(pdev);
6329 * e1000_io_resume - called when traffic can start flowing again.
6330 * @pdev: Pointer to PCI device
6332 * This callback is called when the error recovery driver tells us that
6333 * its OK to resume normal operation. Implementation resembles the
6334 * second-half of the e1000_resume routine.
6336 static void e1000_io_resume(struct pci_dev *pdev)
6338 struct net_device *netdev = pci_get_drvdata(pdev);
6339 struct e1000_adapter *adapter = netdev_priv(netdev);
6341 e1000_init_manageability_pt(adapter);
6343 if (netif_running(netdev)) {
6344 if (e1000e_up(adapter)) {
6346 "can't bring device back up after reset\n");
6351 netif_device_attach(netdev);
6353 /* If the controller has AMT, do not set DRV_LOAD until the interface
6354 * is up. For all other cases, let the f/w know that the h/w is now
6355 * under the control of the driver.
6357 if (!(adapter->flags & FLAG_HAS_AMT))
6358 e1000e_get_hw_control(adapter);
6361 static void e1000_print_device_info(struct e1000_adapter *adapter)
6363 struct e1000_hw *hw = &adapter->hw;
6364 struct net_device *netdev = adapter->netdev;
6366 u8 pba_str[E1000_PBANUM_LENGTH];
6368 /* print bus type/speed/width info */
6369 e_info("(PCI Express:2.5GT/s:%s) %pM\n",
6371 ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
6375 e_info("Intel(R) PRO/%s Network Connection\n",
6376 (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000");
6377 ret_val = e1000_read_pba_string_generic(hw, pba_str,
6378 E1000_PBANUM_LENGTH);
6380 strlcpy((char *)pba_str, "Unknown", sizeof(pba_str));
6381 e_info("MAC: %d, PHY: %d, PBA No: %s\n",
6382 hw->mac.type, hw->phy.type, pba_str);
6385 static void e1000_eeprom_checks(struct e1000_adapter *adapter)
6387 struct e1000_hw *hw = &adapter->hw;
6391 if (hw->mac.type != e1000_82573)
6394 ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf);
6396 if (!ret_val && (!(buf & (1 << 0)))) {
6397 /* Deep Smart Power Down (DSPD) */
6398 dev_warn(&adapter->pdev->dev,
6399 "Warning: detected DSPD enabled in EEPROM\n");
6403 static int e1000_set_features(struct net_device *netdev,
6404 netdev_features_t features)
6406 struct e1000_adapter *adapter = netdev_priv(netdev);
6407 netdev_features_t changed = features ^ netdev->features;
6409 if (changed & (NETIF_F_TSO | NETIF_F_TSO6))
6410 adapter->flags |= FLAG_TSO_FORCE;
6412 if (!(changed & (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX |
6413 NETIF_F_RXCSUM | NETIF_F_RXHASH | NETIF_F_RXFCS |
6417 if (changed & NETIF_F_RXFCS) {
6418 if (features & NETIF_F_RXFCS) {
6419 adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
6421 /* We need to take it back to defaults, which might mean
6422 * stripping is still disabled at the adapter level.
6424 if (adapter->flags2 & FLAG2_DFLT_CRC_STRIPPING)
6425 adapter->flags2 |= FLAG2_CRC_STRIPPING;
6427 adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
6431 netdev->features = features;
6433 if (netif_running(netdev))
6434 e1000e_reinit_locked(adapter);
6436 e1000e_reset(adapter);
6441 static const struct net_device_ops e1000e_netdev_ops = {
6442 .ndo_open = e1000_open,
6443 .ndo_stop = e1000_close,
6444 .ndo_start_xmit = e1000_xmit_frame,
6445 .ndo_get_stats64 = e1000e_get_stats64,
6446 .ndo_set_rx_mode = e1000e_set_rx_mode,
6447 .ndo_set_mac_address = e1000_set_mac,
6448 .ndo_change_mtu = e1000_change_mtu,
6449 .ndo_do_ioctl = e1000_ioctl,
6450 .ndo_tx_timeout = e1000_tx_timeout,
6451 .ndo_validate_addr = eth_validate_addr,
6453 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
6454 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
6455 #ifdef CONFIG_NET_POLL_CONTROLLER
6456 .ndo_poll_controller = e1000_netpoll,
6458 .ndo_set_features = e1000_set_features,
6462 * e1000_probe - Device Initialization Routine
6463 * @pdev: PCI device information struct
6464 * @ent: entry in e1000_pci_tbl
6466 * Returns 0 on success, negative on failure
6468 * e1000_probe initializes an adapter identified by a pci_dev structure.
6469 * The OS initialization, configuring of the adapter private structure,
6470 * and a hardware reset occur.
6472 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
6474 struct net_device *netdev;
6475 struct e1000_adapter *adapter;
6476 struct e1000_hw *hw;
6477 const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
6478 resource_size_t mmio_start, mmio_len;
6479 resource_size_t flash_start, flash_len;
6480 static int cards_found;
6481 u16 aspm_disable_flag = 0;
6482 int i, err, pci_using_dac;
6483 u16 eeprom_data = 0;
6484 u16 eeprom_apme_mask = E1000_EEPROM_APME;
6486 if (ei->flags2 & FLAG2_DISABLE_ASPM_L0S)
6487 aspm_disable_flag = PCIE_LINK_STATE_L0S;
6488 if (ei->flags2 & FLAG2_DISABLE_ASPM_L1)
6489 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6490 if (aspm_disable_flag)
6491 e1000e_disable_aspm(pdev, aspm_disable_flag);
6493 err = pci_enable_device_mem(pdev);
6498 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
6500 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
6504 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
6506 err = dma_set_coherent_mask(&pdev->dev,
6509 dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
6515 err = pci_request_selected_regions_exclusive(pdev,
6516 pci_select_bars(pdev, IORESOURCE_MEM),
6517 e1000e_driver_name);
6521 /* AER (Advanced Error Reporting) hooks */
6522 pci_enable_pcie_error_reporting(pdev);
6524 pci_set_master(pdev);
6525 /* PCI config space info */
6526 err = pci_save_state(pdev);
6528 goto err_alloc_etherdev;
6531 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
6533 goto err_alloc_etherdev;
6535 SET_NETDEV_DEV(netdev, &pdev->dev);
6537 netdev->irq = pdev->irq;
6539 pci_set_drvdata(pdev, netdev);
6540 adapter = netdev_priv(netdev);
6542 adapter->netdev = netdev;
6543 adapter->pdev = pdev;
6545 adapter->pba = ei->pba;
6546 adapter->flags = ei->flags;
6547 adapter->flags2 = ei->flags2;
6548 adapter->hw.adapter = adapter;
6549 adapter->hw.mac.type = ei->mac;
6550 adapter->max_hw_frame_size = ei->max_hw_frame_size;
6551 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
6553 mmio_start = pci_resource_start(pdev, 0);
6554 mmio_len = pci_resource_len(pdev, 0);
6557 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
6558 if (!adapter->hw.hw_addr)
6561 if ((adapter->flags & FLAG_HAS_FLASH) &&
6562 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
6563 flash_start = pci_resource_start(pdev, 1);
6564 flash_len = pci_resource_len(pdev, 1);
6565 adapter->hw.flash_address = ioremap(flash_start, flash_len);
6566 if (!adapter->hw.flash_address)
6570 /* construct the net_device struct */
6571 netdev->netdev_ops = &e1000e_netdev_ops;
6572 e1000e_set_ethtool_ops(netdev);
6573 netdev->watchdog_timeo = 5 * HZ;
6574 netif_napi_add(netdev, &adapter->napi, e1000e_poll, 64);
6575 strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name));
6577 netdev->mem_start = mmio_start;
6578 netdev->mem_end = mmio_start + mmio_len;
6580 adapter->bd_number = cards_found++;
6582 e1000e_check_options(adapter);
6584 /* setup adapter struct */
6585 err = e1000_sw_init(adapter);
6589 memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
6590 memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
6591 memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
6593 err = ei->get_variants(adapter);
6597 if ((adapter->flags & FLAG_IS_ICH) &&
6598 (adapter->flags & FLAG_READ_ONLY_NVM))
6599 e1000e_write_protect_nvm_ich8lan(&adapter->hw);
6601 hw->mac.ops.get_bus_info(&adapter->hw);
6603 adapter->hw.phy.autoneg_wait_to_complete = 0;
6605 /* Copper options */
6606 if (adapter->hw.phy.media_type == e1000_media_type_copper) {
6607 adapter->hw.phy.mdix = AUTO_ALL_MODES;
6608 adapter->hw.phy.disable_polarity_correction = 0;
6609 adapter->hw.phy.ms_type = e1000_ms_hw_default;
6612 if (hw->phy.ops.check_reset_block && hw->phy.ops.check_reset_block(hw))
6613 dev_info(&pdev->dev,
6614 "PHY reset is blocked due to SOL/IDER session.\n");
6616 /* Set initial default active device features */
6617 netdev->features = (NETIF_F_SG |
6618 NETIF_F_HW_VLAN_RX |
6619 NETIF_F_HW_VLAN_TX |
6626 /* Set user-changeable features (subset of all device features) */
6627 netdev->hw_features = netdev->features;
6628 netdev->hw_features |= NETIF_F_RXFCS;
6629 netdev->priv_flags |= IFF_SUPP_NOFCS;
6630 netdev->hw_features |= NETIF_F_RXALL;
6632 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
6633 netdev->features |= NETIF_F_HW_VLAN_FILTER;
6635 netdev->vlan_features |= (NETIF_F_SG |
6640 netdev->priv_flags |= IFF_UNICAST_FLT;
6642 if (pci_using_dac) {
6643 netdev->features |= NETIF_F_HIGHDMA;
6644 netdev->vlan_features |= NETIF_F_HIGHDMA;
6647 if (e1000e_enable_mng_pass_thru(&adapter->hw))
6648 adapter->flags |= FLAG_MNG_PT_ENABLED;
6650 /* before reading the NVM, reset the controller to
6651 * put the device in a known good starting state
6653 adapter->hw.mac.ops.reset_hw(&adapter->hw);
6655 /* systems with ASPM and others may see the checksum fail on the first
6656 * attempt. Let's give it a few tries
6659 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
6662 dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n");
6668 e1000_eeprom_checks(adapter);
6670 /* copy the MAC address */
6671 if (e1000e_read_mac_addr(&adapter->hw))
6673 "NVM Read Error while reading MAC address\n");
6675 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
6677 if (!is_valid_ether_addr(netdev->dev_addr)) {
6678 dev_err(&pdev->dev, "Invalid MAC Address: %pM\n",
6684 init_timer(&adapter->watchdog_timer);
6685 adapter->watchdog_timer.function = e1000_watchdog;
6686 adapter->watchdog_timer.data = (unsigned long) adapter;
6688 init_timer(&adapter->phy_info_timer);
6689 adapter->phy_info_timer.function = e1000_update_phy_info;
6690 adapter->phy_info_timer.data = (unsigned long) adapter;
6692 INIT_WORK(&adapter->reset_task, e1000_reset_task);
6693 INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
6694 INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
6695 INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
6696 INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang);
6698 /* Initialize link parameters. User can change them with ethtool */
6699 adapter->hw.mac.autoneg = 1;
6700 adapter->fc_autoneg = true;
6701 adapter->hw.fc.requested_mode = e1000_fc_default;
6702 adapter->hw.fc.current_mode = e1000_fc_default;
6703 adapter->hw.phy.autoneg_advertised = 0x2f;
6705 /* ring size defaults */
6706 adapter->rx_ring->count = E1000_DEFAULT_RXD;
6707 adapter->tx_ring->count = E1000_DEFAULT_TXD;
6709 /* Initial Wake on LAN setting - If APM wake is enabled in
6710 * the EEPROM, enable the ACPI Magic Packet filter
6712 if (adapter->flags & FLAG_APME_IN_WUC) {
6713 /* APME bit in EEPROM is mapped to WUC.APME */
6714 eeprom_data = er32(WUC);
6715 eeprom_apme_mask = E1000_WUC_APME;
6716 if ((hw->mac.type > e1000_ich10lan) &&
6717 (eeprom_data & E1000_WUC_PHY_WAKE))
6718 adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP;
6719 } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
6720 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
6721 (adapter->hw.bus.func == 1))
6722 e1000_read_nvm(&adapter->hw, NVM_INIT_CONTROL3_PORT_B,
6725 e1000_read_nvm(&adapter->hw, NVM_INIT_CONTROL3_PORT_A,
6729 /* fetch WoL from EEPROM */
6730 if (eeprom_data & eeprom_apme_mask)
6731 adapter->eeprom_wol |= E1000_WUFC_MAG;
6733 /* now that we have the eeprom settings, apply the special cases
6734 * where the eeprom may be wrong or the board simply won't support
6735 * wake on lan on a particular port
6737 if (!(adapter->flags & FLAG_HAS_WOL))
6738 adapter->eeprom_wol = 0;
6740 /* initialize the wol settings based on the eeprom settings */
6741 adapter->wol = adapter->eeprom_wol;
6743 /* make sure adapter isn't asleep if manageability is enabled */
6744 if (adapter->wol || (adapter->flags & FLAG_MNG_PT_ENABLED) ||
6745 (hw->mac.ops.check_mng_mode(hw)))
6746 device_wakeup_enable(&pdev->dev);
6748 /* save off EEPROM version number */
6749 e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers);
6751 /* reset the hardware with the new settings */
6752 e1000e_reset(adapter);
6754 /* If the controller has AMT, do not set DRV_LOAD until the interface
6755 * is up. For all other cases, let the f/w know that the h/w is now
6756 * under the control of the driver.
6758 if (!(adapter->flags & FLAG_HAS_AMT))
6759 e1000e_get_hw_control(adapter);
6761 strlcpy(netdev->name, "eth%d", sizeof(netdev->name));
6762 err = register_netdev(netdev);
6766 /* carrier off reporting is important to ethtool even BEFORE open */
6767 netif_carrier_off(netdev);
6769 /* init PTP hardware clock */
6770 e1000e_ptp_init(adapter);
6772 e1000_print_device_info(adapter);
6774 if (pci_dev_run_wake(pdev))
6775 pm_runtime_put_noidle(&pdev->dev);
6780 if (!(adapter->flags & FLAG_HAS_AMT))
6781 e1000e_release_hw_control(adapter);
6783 if (hw->phy.ops.check_reset_block && !hw->phy.ops.check_reset_block(hw))
6784 e1000_phy_hw_reset(&adapter->hw);
6786 kfree(adapter->tx_ring);
6787 kfree(adapter->rx_ring);
6789 if (adapter->hw.flash_address)
6790 iounmap(adapter->hw.flash_address);
6791 e1000e_reset_interrupt_capability(adapter);
6793 iounmap(adapter->hw.hw_addr);
6795 free_netdev(netdev);
6797 pci_release_selected_regions(pdev,
6798 pci_select_bars(pdev, IORESOURCE_MEM));
6801 pci_disable_device(pdev);
6806 * e1000_remove - Device Removal Routine
6807 * @pdev: PCI device information struct
6809 * e1000_remove is called by the PCI subsystem to alert the driver
6810 * that it should release a PCI device. The could be caused by a
6811 * Hot-Plug event, or because the driver is going to be removed from
6814 static void e1000_remove(struct pci_dev *pdev)
6816 struct net_device *netdev = pci_get_drvdata(pdev);
6817 struct e1000_adapter *adapter = netdev_priv(netdev);
6818 bool down = test_bit(__E1000_DOWN, &adapter->state);
6820 e1000e_ptp_remove(adapter);
6822 /* The timers may be rescheduled, so explicitly disable them
6823 * from being rescheduled.
6826 set_bit(__E1000_DOWN, &adapter->state);
6827 del_timer_sync(&adapter->watchdog_timer);
6828 del_timer_sync(&adapter->phy_info_timer);
6830 cancel_work_sync(&adapter->reset_task);
6831 cancel_work_sync(&adapter->watchdog_task);
6832 cancel_work_sync(&adapter->downshift_task);
6833 cancel_work_sync(&adapter->update_phy_task);
6834 cancel_work_sync(&adapter->print_hang_task);
6836 if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) {
6837 cancel_work_sync(&adapter->tx_hwtstamp_work);
6838 if (adapter->tx_hwtstamp_skb) {
6839 dev_kfree_skb_any(adapter->tx_hwtstamp_skb);
6840 adapter->tx_hwtstamp_skb = NULL;
6844 if (!(netdev->flags & IFF_UP))
6845 e1000_power_down_phy(adapter);
6847 /* Don't lie to e1000_close() down the road. */
6849 clear_bit(__E1000_DOWN, &adapter->state);
6850 unregister_netdev(netdev);
6852 if (pci_dev_run_wake(pdev))
6853 pm_runtime_get_noresume(&pdev->dev);
6855 /* Release control of h/w to f/w. If f/w is AMT enabled, this
6856 * would have already happened in close and is redundant.
6858 e1000e_release_hw_control(adapter);
6860 e1000e_reset_interrupt_capability(adapter);
6861 kfree(adapter->tx_ring);
6862 kfree(adapter->rx_ring);
6864 iounmap(adapter->hw.hw_addr);
6865 if (adapter->hw.flash_address)
6866 iounmap(adapter->hw.flash_address);
6867 pci_release_selected_regions(pdev,
6868 pci_select_bars(pdev, IORESOURCE_MEM));
6870 free_netdev(netdev);
6873 pci_disable_pcie_error_reporting(pdev);
6875 pci_disable_device(pdev);
6878 /* PCI Error Recovery (ERS) */
6879 static const struct pci_error_handlers e1000_err_handler = {
6880 .error_detected = e1000_io_error_detected,
6881 .slot_reset = e1000_io_slot_reset,
6882 .resume = e1000_io_resume,
6885 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
6886 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
6887 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
6888 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
6889 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), board_82571 },
6890 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
6891 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
6892 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
6893 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
6894 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
6896 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
6897 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
6898 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
6899 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
6901 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
6902 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
6903 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
6905 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 },
6906 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 },
6907 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 },
6909 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
6910 board_80003es2lan },
6911 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
6912 board_80003es2lan },
6913 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
6914 board_80003es2lan },
6915 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
6916 board_80003es2lan },
6918 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
6919 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
6920 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
6921 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
6922 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
6923 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
6924 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
6925 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan },
6927 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
6928 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
6929 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
6930 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
6931 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
6932 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan },
6933 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan },
6934 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan },
6935 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan },
6937 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan },
6938 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan },
6939 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan },
6941 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan },
6942 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan },
6943 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_V), board_ich10lan },
6945 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan },
6946 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan },
6947 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan },
6948 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan },
6950 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_LM), board_pch2lan },
6951 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_V), board_pch2lan },
6953 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_LM), board_pch_lpt },
6954 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_V), board_pch_lpt },
6955 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_LM), board_pch_lpt },
6956 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_V), board_pch_lpt },
6958 { 0, 0, 0, 0, 0, 0, 0 } /* terminate list */
6960 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
6963 static const struct dev_pm_ops e1000_pm_ops = {
6964 SET_SYSTEM_SLEEP_PM_OPS(e1000_suspend, e1000_resume)
6965 SET_RUNTIME_PM_OPS(e1000_runtime_suspend,
6966 e1000_runtime_resume, e1000_idle)
6970 /* PCI Device API Driver */
6971 static struct pci_driver e1000_driver = {
6972 .name = e1000e_driver_name,
6973 .id_table = e1000_pci_tbl,
6974 .probe = e1000_probe,
6975 .remove = e1000_remove,
6978 .pm = &e1000_pm_ops,
6981 .shutdown = e1000_shutdown,
6982 .err_handler = &e1000_err_handler
6986 * e1000_init_module - Driver Registration Routine
6988 * e1000_init_module is the first routine called when the driver is
6989 * loaded. All it does is register with the PCI subsystem.
6991 static int __init e1000_init_module(void)
6994 pr_info("Intel(R) PRO/1000 Network Driver - %s\n",
6995 e1000e_driver_version);
6996 pr_info("Copyright(c) 1999 - 2013 Intel Corporation.\n");
6997 ret = pci_register_driver(&e1000_driver);
7001 module_init(e1000_init_module);
7004 * e1000_exit_module - Driver Exit Cleanup Routine
7006 * e1000_exit_module is called just before the driver is removed
7009 static void __exit e1000_exit_module(void)
7011 pci_unregister_driver(&e1000_driver);
7013 module_exit(e1000_exit_module);
7016 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
7017 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
7018 MODULE_LICENSE("GPL");
7019 MODULE_VERSION(DRV_VERSION);