1 /*******************************************************************************
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2012 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/mii.h>
46 #include <linux/ethtool.h>
47 #include <linux/if_vlan.h>
48 #include <linux/cpu.h>
49 #include <linux/smp.h>
50 #include <linux/pm_qos.h>
51 #include <linux/pm_runtime.h>
52 #include <linux/aer.h>
53 #include <linux/prefetch.h>
57 #define DRV_EXTRAVERSION "-k"
59 #define DRV_VERSION "2.0.0" DRV_EXTRAVERSION
60 char e1000e_driver_name
[] = "e1000e";
61 const char e1000e_driver_version
[] = DRV_VERSION
;
63 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
64 static int debug
= -1;
65 module_param(debug
, int, 0);
66 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
68 static void e1000e_disable_aspm(struct pci_dev
*pdev
, u16 state
);
70 static const struct e1000_info
*e1000_info_tbl
[] = {
71 [board_82571
] = &e1000_82571_info
,
72 [board_82572
] = &e1000_82572_info
,
73 [board_82573
] = &e1000_82573_info
,
74 [board_82574
] = &e1000_82574_info
,
75 [board_82583
] = &e1000_82583_info
,
76 [board_80003es2lan
] = &e1000_es2_info
,
77 [board_ich8lan
] = &e1000_ich8_info
,
78 [board_ich9lan
] = &e1000_ich9_info
,
79 [board_ich10lan
] = &e1000_ich10_info
,
80 [board_pchlan
] = &e1000_pch_info
,
81 [board_pch2lan
] = &e1000_pch2_info
,
82 [board_pch_lpt
] = &e1000_pch_lpt_info
,
85 struct e1000_reg_info
{
90 #define E1000_RDFH 0x02410 /* Rx Data FIFO Head - RW */
91 #define E1000_RDFT 0x02418 /* Rx Data FIFO Tail - RW */
92 #define E1000_RDFHS 0x02420 /* Rx Data FIFO Head Saved - RW */
93 #define E1000_RDFTS 0x02428 /* Rx Data FIFO Tail Saved - RW */
94 #define E1000_RDFPC 0x02430 /* Rx Data FIFO Packet Count - RW */
96 #define E1000_TDFH 0x03410 /* Tx Data FIFO Head - RW */
97 #define E1000_TDFT 0x03418 /* Tx Data FIFO Tail - RW */
98 #define E1000_TDFHS 0x03420 /* Tx Data FIFO Head Saved - RW */
99 #define E1000_TDFTS 0x03428 /* Tx Data FIFO Tail Saved - RW */
100 #define E1000_TDFPC 0x03430 /* Tx Data FIFO Packet Count - RW */
102 static const struct e1000_reg_info e1000_reg_info_tbl
[] = {
104 /* General Registers */
105 {E1000_CTRL
, "CTRL"},
106 {E1000_STATUS
, "STATUS"},
107 {E1000_CTRL_EXT
, "CTRL_EXT"},
109 /* Interrupt Registers */
113 {E1000_RCTL
, "RCTL"},
114 {E1000_RDLEN(0), "RDLEN"},
115 {E1000_RDH(0), "RDH"},
116 {E1000_RDT(0), "RDT"},
117 {E1000_RDTR
, "RDTR"},
118 {E1000_RXDCTL(0), "RXDCTL"},
120 {E1000_RDBAL(0), "RDBAL"},
121 {E1000_RDBAH(0), "RDBAH"},
122 {E1000_RDFH
, "RDFH"},
123 {E1000_RDFT
, "RDFT"},
124 {E1000_RDFHS
, "RDFHS"},
125 {E1000_RDFTS
, "RDFTS"},
126 {E1000_RDFPC
, "RDFPC"},
129 {E1000_TCTL
, "TCTL"},
130 {E1000_TDBAL(0), "TDBAL"},
131 {E1000_TDBAH(0), "TDBAH"},
132 {E1000_TDLEN(0), "TDLEN"},
133 {E1000_TDH(0), "TDH"},
134 {E1000_TDT(0), "TDT"},
135 {E1000_TIDV
, "TIDV"},
136 {E1000_TXDCTL(0), "TXDCTL"},
137 {E1000_TADV
, "TADV"},
138 {E1000_TARC(0), "TARC"},
139 {E1000_TDFH
, "TDFH"},
140 {E1000_TDFT
, "TDFT"},
141 {E1000_TDFHS
, "TDFHS"},
142 {E1000_TDFTS
, "TDFTS"},
143 {E1000_TDFPC
, "TDFPC"},
145 /* List Terminator */
150 * e1000_regdump - register printout routine
152 static void e1000_regdump(struct e1000_hw
*hw
, struct e1000_reg_info
*reginfo
)
158 switch (reginfo
->ofs
) {
159 case E1000_RXDCTL(0):
160 for (n
= 0; n
< 2; n
++)
161 regs
[n
] = __er32(hw
, E1000_RXDCTL(n
));
163 case E1000_TXDCTL(0):
164 for (n
= 0; n
< 2; n
++)
165 regs
[n
] = __er32(hw
, E1000_TXDCTL(n
));
168 for (n
= 0; n
< 2; n
++)
169 regs
[n
] = __er32(hw
, E1000_TARC(n
));
172 pr_info("%-15s %08x\n",
173 reginfo
->name
, __er32(hw
, reginfo
->ofs
));
177 snprintf(rname
, 16, "%s%s", reginfo
->name
, "[0-1]");
178 pr_info("%-15s %08x %08x\n", rname
, regs
[0], regs
[1]);
182 * e1000e_dump - Print registers, Tx-ring and Rx-ring
184 static void e1000e_dump(struct e1000_adapter
*adapter
)
186 struct net_device
*netdev
= adapter
->netdev
;
187 struct e1000_hw
*hw
= &adapter
->hw
;
188 struct e1000_reg_info
*reginfo
;
189 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
190 struct e1000_tx_desc
*tx_desc
;
195 struct e1000_buffer
*buffer_info
;
196 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
197 union e1000_rx_desc_packet_split
*rx_desc_ps
;
198 union e1000_rx_desc_extended
*rx_desc
;
208 if (!netif_msg_hw(adapter
))
211 /* Print netdevice Info */
213 dev_info(&adapter
->pdev
->dev
, "Net device Info\n");
214 pr_info("Device Name state trans_start last_rx\n");
215 pr_info("%-15s %016lX %016lX %016lX\n",
216 netdev
->name
, netdev
->state
, netdev
->trans_start
,
220 /* Print Registers */
221 dev_info(&adapter
->pdev
->dev
, "Register Dump\n");
222 pr_info(" Register Name Value\n");
223 for (reginfo
= (struct e1000_reg_info
*)e1000_reg_info_tbl
;
224 reginfo
->name
; reginfo
++) {
225 e1000_regdump(hw
, reginfo
);
228 /* Print Tx Ring Summary */
229 if (!netdev
|| !netif_running(netdev
))
232 dev_info(&adapter
->pdev
->dev
, "Tx Ring Summary\n");
233 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n");
234 buffer_info
= &tx_ring
->buffer_info
[tx_ring
->next_to_clean
];
235 pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n",
236 0, tx_ring
->next_to_use
, tx_ring
->next_to_clean
,
237 (unsigned long long)buffer_info
->dma
,
239 buffer_info
->next_to_watch
,
240 (unsigned long long)buffer_info
->time_stamp
);
243 if (!netif_msg_tx_done(adapter
))
244 goto rx_ring_summary
;
246 dev_info(&adapter
->pdev
->dev
, "Tx Ring Dump\n");
248 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
250 * Legacy Transmit Descriptor
251 * +--------------------------------------------------------------+
252 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
253 * +--------------------------------------------------------------+
254 * 8 | Special | CSS | Status | CMD | CSO | Length |
255 * +--------------------------------------------------------------+
256 * 63 48 47 36 35 32 31 24 23 16 15 0
258 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
259 * 63 48 47 40 39 32 31 16 15 8 7 0
260 * +----------------------------------------------------------------+
261 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
262 * +----------------------------------------------------------------+
263 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
264 * +----------------------------------------------------------------+
265 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
267 * Extended Data Descriptor (DTYP=0x1)
268 * +----------------------------------------------------------------+
269 * 0 | Buffer Address [63:0] |
270 * +----------------------------------------------------------------+
271 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
272 * +----------------------------------------------------------------+
273 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
275 pr_info("Tl[desc] [address 63:0 ] [SpeCssSCmCsLen] [bi->dma ] leng ntw timestamp bi->skb <-- Legacy format\n");
276 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Context format\n");
277 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Data format\n");
278 for (i
= 0; tx_ring
->desc
&& (i
< tx_ring
->count
); i
++) {
279 const char *next_desc
;
280 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
281 buffer_info
= &tx_ring
->buffer_info
[i
];
282 u0
= (struct my_u0
*)tx_desc
;
283 if (i
== tx_ring
->next_to_use
&& i
== tx_ring
->next_to_clean
)
284 next_desc
= " NTC/U";
285 else if (i
== tx_ring
->next_to_use
)
287 else if (i
== tx_ring
->next_to_clean
)
291 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p%s\n",
292 (!(le64_to_cpu(u0
->b
) & (1 << 29)) ? 'l' :
293 ((le64_to_cpu(u0
->b
) & (1 << 20)) ? 'd' : 'c')),
295 (unsigned long long)le64_to_cpu(u0
->a
),
296 (unsigned long long)le64_to_cpu(u0
->b
),
297 (unsigned long long)buffer_info
->dma
,
298 buffer_info
->length
, buffer_info
->next_to_watch
,
299 (unsigned long long)buffer_info
->time_stamp
,
300 buffer_info
->skb
, next_desc
);
302 if (netif_msg_pktdata(adapter
) && buffer_info
->dma
!= 0)
303 print_hex_dump(KERN_INFO
, "", DUMP_PREFIX_ADDRESS
,
304 16, 1, phys_to_virt(buffer_info
->dma
),
305 buffer_info
->length
, true);
308 /* Print Rx Ring Summary */
310 dev_info(&adapter
->pdev
->dev
, "Rx Ring Summary\n");
311 pr_info("Queue [NTU] [NTC]\n");
312 pr_info(" %5d %5X %5X\n",
313 0, rx_ring
->next_to_use
, rx_ring
->next_to_clean
);
316 if (!netif_msg_rx_status(adapter
))
319 dev_info(&adapter
->pdev
->dev
, "Rx Ring Dump\n");
320 switch (adapter
->rx_ps_pages
) {
324 /* [Extended] Packet Split Receive Descriptor Format
326 * +-----------------------------------------------------+
327 * 0 | Buffer Address 0 [63:0] |
328 * +-----------------------------------------------------+
329 * 8 | Buffer Address 1 [63:0] |
330 * +-----------------------------------------------------+
331 * 16 | Buffer Address 2 [63:0] |
332 * +-----------------------------------------------------+
333 * 24 | Buffer Address 3 [63:0] |
334 * +-----------------------------------------------------+
336 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");
337 /* [Extended] Receive Descriptor (Write-Back) Format
339 * 63 48 47 32 31 13 12 8 7 4 3 0
340 * +------------------------------------------------------+
341 * 0 | Packet | IP | Rsvd | MRQ | Rsvd | MRQ RSS |
342 * | Checksum | Ident | | Queue | | Type |
343 * +------------------------------------------------------+
344 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
345 * +------------------------------------------------------+
346 * 63 48 47 32 31 20 19 0
348 pr_info("RWB[desc] [ck ipid mrqhsh] [vl l0 ee es] [ l3 l2 l1 hs] [reserved ] ---------------- [bi->skb] <-- Ext Rx Write-Back format\n");
349 for (i
= 0; i
< rx_ring
->count
; i
++) {
350 const char *next_desc
;
351 buffer_info
= &rx_ring
->buffer_info
[i
];
352 rx_desc_ps
= E1000_RX_DESC_PS(*rx_ring
, i
);
353 u1
= (struct my_u1
*)rx_desc_ps
;
355 le32_to_cpu(rx_desc_ps
->wb
.middle
.status_error
);
357 if (i
== rx_ring
->next_to_use
)
359 else if (i
== rx_ring
->next_to_clean
)
364 if (staterr
& E1000_RXD_STAT_DD
) {
365 /* Descriptor Done */
366 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX ---------------- %p%s\n",
368 (unsigned long long)le64_to_cpu(u1
->a
),
369 (unsigned long long)le64_to_cpu(u1
->b
),
370 (unsigned long long)le64_to_cpu(u1
->c
),
371 (unsigned long long)le64_to_cpu(u1
->d
),
372 buffer_info
->skb
, next_desc
);
374 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX %016llX %p%s\n",
376 (unsigned long long)le64_to_cpu(u1
->a
),
377 (unsigned long long)le64_to_cpu(u1
->b
),
378 (unsigned long long)le64_to_cpu(u1
->c
),
379 (unsigned long long)le64_to_cpu(u1
->d
),
380 (unsigned long long)buffer_info
->dma
,
381 buffer_info
->skb
, next_desc
);
383 if (netif_msg_pktdata(adapter
))
384 print_hex_dump(KERN_INFO
, "",
385 DUMP_PREFIX_ADDRESS
, 16, 1,
386 phys_to_virt(buffer_info
->dma
),
387 adapter
->rx_ps_bsize0
, true);
393 /* Extended Receive Descriptor (Read) Format
395 * +-----------------------------------------------------+
396 * 0 | Buffer Address [63:0] |
397 * +-----------------------------------------------------+
399 * +-----------------------------------------------------+
401 pr_info("R [desc] [buf addr 63:0 ] [reserved 63:0 ] [bi->dma ] [bi->skb] <-- Ext (Read) format\n");
402 /* Extended Receive Descriptor (Write-Back) Format
404 * 63 48 47 32 31 24 23 4 3 0
405 * +------------------------------------------------------+
407 * 0 +-------------------+ Rsvd | Reserved | MRQ RSS |
408 * | Packet | IP | | | Type |
409 * | Checksum | Ident | | | |
410 * +------------------------------------------------------+
411 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
412 * +------------------------------------------------------+
413 * 63 48 47 32 31 20 19 0
415 pr_info("RWB[desc] [cs ipid mrq] [vt ln xe xs] [bi->skb] <-- Ext (Write-Back) format\n");
417 for (i
= 0; i
< rx_ring
->count
; i
++) {
418 const char *next_desc
;
420 buffer_info
= &rx_ring
->buffer_info
[i
];
421 rx_desc
= E1000_RX_DESC_EXT(*rx_ring
, i
);
422 u1
= (struct my_u1
*)rx_desc
;
423 staterr
= le32_to_cpu(rx_desc
->wb
.upper
.status_error
);
425 if (i
== rx_ring
->next_to_use
)
427 else if (i
== rx_ring
->next_to_clean
)
432 if (staterr
& E1000_RXD_STAT_DD
) {
433 /* Descriptor Done */
434 pr_info("%s[0x%03X] %016llX %016llX ---------------- %p%s\n",
436 (unsigned long long)le64_to_cpu(u1
->a
),
437 (unsigned long long)le64_to_cpu(u1
->b
),
438 buffer_info
->skb
, next_desc
);
440 pr_info("%s[0x%03X] %016llX %016llX %016llX %p%s\n",
442 (unsigned long long)le64_to_cpu(u1
->a
),
443 (unsigned long long)le64_to_cpu(u1
->b
),
444 (unsigned long long)buffer_info
->dma
,
445 buffer_info
->skb
, next_desc
);
447 if (netif_msg_pktdata(adapter
))
448 print_hex_dump(KERN_INFO
, "",
449 DUMP_PREFIX_ADDRESS
, 16,
453 adapter
->rx_buffer_len
,
461 * e1000_desc_unused - calculate if we have unused descriptors
463 static int e1000_desc_unused(struct e1000_ring
*ring
)
465 if (ring
->next_to_clean
> ring
->next_to_use
)
466 return ring
->next_to_clean
- ring
->next_to_use
- 1;
468 return ring
->count
+ ring
->next_to_clean
- ring
->next_to_use
- 1;
472 * e1000_receive_skb - helper function to handle Rx indications
473 * @adapter: board private structure
474 * @status: descriptor status field as written by hardware
475 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
476 * @skb: pointer to sk_buff to be indicated to stack
478 static void e1000_receive_skb(struct e1000_adapter
*adapter
,
479 struct net_device
*netdev
, struct sk_buff
*skb
,
480 u8 status
, __le16 vlan
)
482 u16 tag
= le16_to_cpu(vlan
);
483 skb
->protocol
= eth_type_trans(skb
, netdev
);
485 if (status
& E1000_RXD_STAT_VP
)
486 __vlan_hwaccel_put_tag(skb
, tag
);
488 napi_gro_receive(&adapter
->napi
, skb
);
492 * e1000_rx_checksum - Receive Checksum Offload
493 * @adapter: board private structure
494 * @status_err: receive descriptor status and error fields
495 * @csum: receive descriptor csum field
496 * @sk_buff: socket buffer with received data
498 static void e1000_rx_checksum(struct e1000_adapter
*adapter
, u32 status_err
,
499 __le16 csum
, struct sk_buff
*skb
)
501 u16 status
= (u16
)status_err
;
502 u8 errors
= (u8
)(status_err
>> 24);
504 skb_checksum_none_assert(skb
);
506 /* Rx checksum disabled */
507 if (!(adapter
->netdev
->features
& NETIF_F_RXCSUM
))
510 /* Ignore Checksum bit is set */
511 if (status
& E1000_RXD_STAT_IXSM
)
514 /* TCP/UDP checksum error bit is set */
515 if (errors
& E1000_RXD_ERR_TCPE
) {
516 /* let the stack verify checksum errors */
517 adapter
->hw_csum_err
++;
521 /* TCP/UDP Checksum has not been calculated */
522 if (!(status
& (E1000_RXD_STAT_TCPCS
| E1000_RXD_STAT_UDPCS
)))
525 /* It must be a TCP or UDP packet with a valid checksum */
526 if (status
& E1000_RXD_STAT_TCPCS
) {
527 /* TCP checksum is good */
528 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
531 * IP fragment with UDP payload
532 * Hardware complements the payload checksum, so we undo it
533 * and then put the value in host order for further stack use.
535 __sum16 sum
= (__force __sum16
)swab16((__force u16
)csum
);
536 skb
->csum
= csum_unfold(~sum
);
537 skb
->ip_summed
= CHECKSUM_COMPLETE
;
539 adapter
->hw_csum_good
++;
542 static void e1000e_update_rdt_wa(struct e1000_ring
*rx_ring
, unsigned int i
)
544 struct e1000_adapter
*adapter
= rx_ring
->adapter
;
545 struct e1000_hw
*hw
= &adapter
->hw
;
546 s32 ret_val
= __ew32_prepare(hw
);
548 writel(i
, rx_ring
->tail
);
550 if (unlikely(!ret_val
&& (i
!= readl(rx_ring
->tail
)))) {
551 u32 rctl
= er32(RCTL
);
552 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
553 e_err("ME firmware caused invalid RDT - resetting\n");
554 schedule_work(&adapter
->reset_task
);
558 static void e1000e_update_tdt_wa(struct e1000_ring
*tx_ring
, unsigned int i
)
560 struct e1000_adapter
*adapter
= tx_ring
->adapter
;
561 struct e1000_hw
*hw
= &adapter
->hw
;
562 s32 ret_val
= __ew32_prepare(hw
);
564 writel(i
, tx_ring
->tail
);
566 if (unlikely(!ret_val
&& (i
!= readl(tx_ring
->tail
)))) {
567 u32 tctl
= er32(TCTL
);
568 ew32(TCTL
, tctl
& ~E1000_TCTL_EN
);
569 e_err("ME firmware caused invalid TDT - resetting\n");
570 schedule_work(&adapter
->reset_task
);
575 * e1000_alloc_rx_buffers - Replace used receive buffers
576 * @rx_ring: Rx descriptor ring
578 static void e1000_alloc_rx_buffers(struct e1000_ring
*rx_ring
,
579 int cleaned_count
, gfp_t gfp
)
581 struct e1000_adapter
*adapter
= rx_ring
->adapter
;
582 struct net_device
*netdev
= adapter
->netdev
;
583 struct pci_dev
*pdev
= adapter
->pdev
;
584 union e1000_rx_desc_extended
*rx_desc
;
585 struct e1000_buffer
*buffer_info
;
588 unsigned int bufsz
= adapter
->rx_buffer_len
;
590 i
= rx_ring
->next_to_use
;
591 buffer_info
= &rx_ring
->buffer_info
[i
];
593 while (cleaned_count
--) {
594 skb
= buffer_info
->skb
;
600 skb
= __netdev_alloc_skb_ip_align(netdev
, bufsz
, gfp
);
602 /* Better luck next round */
603 adapter
->alloc_rx_buff_failed
++;
607 buffer_info
->skb
= skb
;
609 buffer_info
->dma
= dma_map_single(&pdev
->dev
, skb
->data
,
610 adapter
->rx_buffer_len
,
612 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
613 dev_err(&pdev
->dev
, "Rx DMA map failed\n");
614 adapter
->rx_dma_failed
++;
618 rx_desc
= E1000_RX_DESC_EXT(*rx_ring
, i
);
619 rx_desc
->read
.buffer_addr
= cpu_to_le64(buffer_info
->dma
);
621 if (unlikely(!(i
& (E1000_RX_BUFFER_WRITE
- 1)))) {
623 * Force memory writes to complete before letting h/w
624 * know there are new descriptors to fetch. (Only
625 * applicable for weak-ordered memory model archs,
629 if (adapter
->flags2
& FLAG2_PCIM2PCI_ARBITER_WA
)
630 e1000e_update_rdt_wa(rx_ring
, i
);
632 writel(i
, rx_ring
->tail
);
635 if (i
== rx_ring
->count
)
637 buffer_info
= &rx_ring
->buffer_info
[i
];
640 rx_ring
->next_to_use
= i
;
644 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
645 * @rx_ring: Rx descriptor ring
647 static void e1000_alloc_rx_buffers_ps(struct e1000_ring
*rx_ring
,
648 int cleaned_count
, gfp_t gfp
)
650 struct e1000_adapter
*adapter
= rx_ring
->adapter
;
651 struct net_device
*netdev
= adapter
->netdev
;
652 struct pci_dev
*pdev
= adapter
->pdev
;
653 union e1000_rx_desc_packet_split
*rx_desc
;
654 struct e1000_buffer
*buffer_info
;
655 struct e1000_ps_page
*ps_page
;
659 i
= rx_ring
->next_to_use
;
660 buffer_info
= &rx_ring
->buffer_info
[i
];
662 while (cleaned_count
--) {
663 rx_desc
= E1000_RX_DESC_PS(*rx_ring
, i
);
665 for (j
= 0; j
< PS_PAGE_BUFFERS
; j
++) {
666 ps_page
= &buffer_info
->ps_pages
[j
];
667 if (j
>= adapter
->rx_ps_pages
) {
668 /* all unused desc entries get hw null ptr */
669 rx_desc
->read
.buffer_addr
[j
+ 1] =
673 if (!ps_page
->page
) {
674 ps_page
->page
= alloc_page(gfp
);
675 if (!ps_page
->page
) {
676 adapter
->alloc_rx_buff_failed
++;
679 ps_page
->dma
= dma_map_page(&pdev
->dev
,
683 if (dma_mapping_error(&pdev
->dev
,
685 dev_err(&adapter
->pdev
->dev
,
686 "Rx DMA page map failed\n");
687 adapter
->rx_dma_failed
++;
692 * Refresh the desc even if buffer_addrs
693 * didn't change because each write-back
696 rx_desc
->read
.buffer_addr
[j
+ 1] =
697 cpu_to_le64(ps_page
->dma
);
700 skb
= __netdev_alloc_skb_ip_align(netdev
,
701 adapter
->rx_ps_bsize0
,
705 adapter
->alloc_rx_buff_failed
++;
709 buffer_info
->skb
= skb
;
710 buffer_info
->dma
= dma_map_single(&pdev
->dev
, skb
->data
,
711 adapter
->rx_ps_bsize0
,
713 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
714 dev_err(&pdev
->dev
, "Rx DMA map failed\n");
715 adapter
->rx_dma_failed
++;
717 dev_kfree_skb_any(skb
);
718 buffer_info
->skb
= NULL
;
722 rx_desc
->read
.buffer_addr
[0] = cpu_to_le64(buffer_info
->dma
);
724 if (unlikely(!(i
& (E1000_RX_BUFFER_WRITE
- 1)))) {
726 * Force memory writes to complete before letting h/w
727 * know there are new descriptors to fetch. (Only
728 * applicable for weak-ordered memory model archs,
732 if (adapter
->flags2
& FLAG2_PCIM2PCI_ARBITER_WA
)
733 e1000e_update_rdt_wa(rx_ring
, i
<< 1);
735 writel(i
<< 1, rx_ring
->tail
);
739 if (i
== rx_ring
->count
)
741 buffer_info
= &rx_ring
->buffer_info
[i
];
745 rx_ring
->next_to_use
= i
;
749 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
750 * @rx_ring: Rx descriptor ring
751 * @cleaned_count: number of buffers to allocate this pass
754 static void e1000_alloc_jumbo_rx_buffers(struct e1000_ring
*rx_ring
,
755 int cleaned_count
, gfp_t gfp
)
757 struct e1000_adapter
*adapter
= rx_ring
->adapter
;
758 struct net_device
*netdev
= adapter
->netdev
;
759 struct pci_dev
*pdev
= adapter
->pdev
;
760 union e1000_rx_desc_extended
*rx_desc
;
761 struct e1000_buffer
*buffer_info
;
764 unsigned int bufsz
= 256 - 16 /* for skb_reserve */;
766 i
= rx_ring
->next_to_use
;
767 buffer_info
= &rx_ring
->buffer_info
[i
];
769 while (cleaned_count
--) {
770 skb
= buffer_info
->skb
;
776 skb
= __netdev_alloc_skb_ip_align(netdev
, bufsz
, gfp
);
777 if (unlikely(!skb
)) {
778 /* Better luck next round */
779 adapter
->alloc_rx_buff_failed
++;
783 buffer_info
->skb
= skb
;
785 /* allocate a new page if necessary */
786 if (!buffer_info
->page
) {
787 buffer_info
->page
= alloc_page(gfp
);
788 if (unlikely(!buffer_info
->page
)) {
789 adapter
->alloc_rx_buff_failed
++;
794 if (!buffer_info
->dma
)
795 buffer_info
->dma
= dma_map_page(&pdev
->dev
,
796 buffer_info
->page
, 0,
800 rx_desc
= E1000_RX_DESC_EXT(*rx_ring
, i
);
801 rx_desc
->read
.buffer_addr
= cpu_to_le64(buffer_info
->dma
);
803 if (unlikely(++i
== rx_ring
->count
))
805 buffer_info
= &rx_ring
->buffer_info
[i
];
808 if (likely(rx_ring
->next_to_use
!= i
)) {
809 rx_ring
->next_to_use
= i
;
810 if (unlikely(i
-- == 0))
811 i
= (rx_ring
->count
- 1);
813 /* Force memory writes to complete before letting h/w
814 * know there are new descriptors to fetch. (Only
815 * applicable for weak-ordered memory model archs,
818 if (adapter
->flags2
& FLAG2_PCIM2PCI_ARBITER_WA
)
819 e1000e_update_rdt_wa(rx_ring
, i
);
821 writel(i
, rx_ring
->tail
);
825 static inline void e1000_rx_hash(struct net_device
*netdev
, __le32 rss
,
828 if (netdev
->features
& NETIF_F_RXHASH
)
829 skb
->rxhash
= le32_to_cpu(rss
);
833 * e1000_clean_rx_irq - Send received data up the network stack
834 * @rx_ring: Rx descriptor ring
836 * the return value indicates whether actual cleaning was done, there
837 * is no guarantee that everything was cleaned
839 static bool e1000_clean_rx_irq(struct e1000_ring
*rx_ring
, int *work_done
,
842 struct e1000_adapter
*adapter
= rx_ring
->adapter
;
843 struct net_device
*netdev
= adapter
->netdev
;
844 struct pci_dev
*pdev
= adapter
->pdev
;
845 struct e1000_hw
*hw
= &adapter
->hw
;
846 union e1000_rx_desc_extended
*rx_desc
, *next_rxd
;
847 struct e1000_buffer
*buffer_info
, *next_buffer
;
850 int cleaned_count
= 0;
851 bool cleaned
= false;
852 unsigned int total_rx_bytes
= 0, total_rx_packets
= 0;
854 i
= rx_ring
->next_to_clean
;
855 rx_desc
= E1000_RX_DESC_EXT(*rx_ring
, i
);
856 staterr
= le32_to_cpu(rx_desc
->wb
.upper
.status_error
);
857 buffer_info
= &rx_ring
->buffer_info
[i
];
859 while (staterr
& E1000_RXD_STAT_DD
) {
862 if (*work_done
>= work_to_do
)
865 rmb(); /* read descriptor and rx_buffer_info after status DD */
867 skb
= buffer_info
->skb
;
868 buffer_info
->skb
= NULL
;
870 prefetch(skb
->data
- NET_IP_ALIGN
);
873 if (i
== rx_ring
->count
)
875 next_rxd
= E1000_RX_DESC_EXT(*rx_ring
, i
);
878 next_buffer
= &rx_ring
->buffer_info
[i
];
882 dma_unmap_single(&pdev
->dev
,
884 adapter
->rx_buffer_len
,
886 buffer_info
->dma
= 0;
888 length
= le16_to_cpu(rx_desc
->wb
.upper
.length
);
891 * !EOP means multiple descriptors were used to store a single
892 * packet, if that's the case we need to toss it. In fact, we
893 * need to toss every packet with the EOP bit clear and the
894 * next frame that _does_ have the EOP bit set, as it is by
895 * definition only a frame fragment
897 if (unlikely(!(staterr
& E1000_RXD_STAT_EOP
)))
898 adapter
->flags2
|= FLAG2_IS_DISCARDING
;
900 if (adapter
->flags2
& FLAG2_IS_DISCARDING
) {
901 /* All receives must fit into a single buffer */
902 e_dbg("Receive packet consumed multiple buffers\n");
904 buffer_info
->skb
= skb
;
905 if (staterr
& E1000_RXD_STAT_EOP
)
906 adapter
->flags2
&= ~FLAG2_IS_DISCARDING
;
910 if (unlikely((staterr
& E1000_RXDEXT_ERR_FRAME_ERR_MASK
) &&
911 !(netdev
->features
& NETIF_F_RXALL
))) {
913 buffer_info
->skb
= skb
;
917 /* adjust length to remove Ethernet CRC */
918 if (!(adapter
->flags2
& FLAG2_CRC_STRIPPING
)) {
919 /* If configured to store CRC, don't subtract FCS,
920 * but keep the FCS bytes out of the total_rx_bytes
923 if (netdev
->features
& NETIF_F_RXFCS
)
929 total_rx_bytes
+= length
;
933 * code added for copybreak, this should improve
934 * performance for small packets with large amounts
935 * of reassembly being done in the stack
937 if (length
< copybreak
) {
938 struct sk_buff
*new_skb
=
939 netdev_alloc_skb_ip_align(netdev
, length
);
941 skb_copy_to_linear_data_offset(new_skb
,
947 /* save the skb in buffer_info as good */
948 buffer_info
->skb
= skb
;
951 /* else just continue with the old one */
953 /* end copybreak code */
954 skb_put(skb
, length
);
956 /* Receive Checksum Offload */
957 e1000_rx_checksum(adapter
, staterr
,
958 rx_desc
->wb
.lower
.hi_dword
.csum_ip
.csum
, skb
);
960 e1000_rx_hash(netdev
, rx_desc
->wb
.lower
.hi_dword
.rss
, skb
);
962 e1000_receive_skb(adapter
, netdev
, skb
, staterr
,
963 rx_desc
->wb
.upper
.vlan
);
966 rx_desc
->wb
.upper
.status_error
&= cpu_to_le32(~0xFF);
968 /* return some buffers to hardware, one at a time is too slow */
969 if (cleaned_count
>= E1000_RX_BUFFER_WRITE
) {
970 adapter
->alloc_rx_buf(rx_ring
, cleaned_count
,
975 /* use prefetched values */
977 buffer_info
= next_buffer
;
979 staterr
= le32_to_cpu(rx_desc
->wb
.upper
.status_error
);
981 rx_ring
->next_to_clean
= i
;
983 cleaned_count
= e1000_desc_unused(rx_ring
);
985 adapter
->alloc_rx_buf(rx_ring
, cleaned_count
, GFP_ATOMIC
);
987 adapter
->total_rx_bytes
+= total_rx_bytes
;
988 adapter
->total_rx_packets
+= total_rx_packets
;
992 static void e1000_put_txbuf(struct e1000_ring
*tx_ring
,
993 struct e1000_buffer
*buffer_info
)
995 struct e1000_adapter
*adapter
= tx_ring
->adapter
;
997 if (buffer_info
->dma
) {
998 if (buffer_info
->mapped_as_page
)
999 dma_unmap_page(&adapter
->pdev
->dev
, buffer_info
->dma
,
1000 buffer_info
->length
, DMA_TO_DEVICE
);
1002 dma_unmap_single(&adapter
->pdev
->dev
, buffer_info
->dma
,
1003 buffer_info
->length
, DMA_TO_DEVICE
);
1004 buffer_info
->dma
= 0;
1006 if (buffer_info
->skb
) {
1007 dev_kfree_skb_any(buffer_info
->skb
);
1008 buffer_info
->skb
= NULL
;
1010 buffer_info
->time_stamp
= 0;
1013 static void e1000_print_hw_hang(struct work_struct
*work
)
1015 struct e1000_adapter
*adapter
= container_of(work
,
1016 struct e1000_adapter
,
1018 struct net_device
*netdev
= adapter
->netdev
;
1019 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1020 unsigned int i
= tx_ring
->next_to_clean
;
1021 unsigned int eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1022 struct e1000_tx_desc
*eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
1023 struct e1000_hw
*hw
= &adapter
->hw
;
1024 u16 phy_status
, phy_1000t_status
, phy_ext_status
;
1027 if (test_bit(__E1000_DOWN
, &adapter
->state
))
1030 if (!adapter
->tx_hang_recheck
&&
1031 (adapter
->flags2
& FLAG2_DMA_BURST
)) {
1033 * May be block on write-back, flush and detect again
1034 * flush pending descriptor writebacks to memory
1036 ew32(TIDV
, adapter
->tx_int_delay
| E1000_TIDV_FPD
);
1037 /* execute the writes immediately */
1040 * Due to rare timing issues, write to TIDV again to ensure
1041 * the write is successful
1043 ew32(TIDV
, adapter
->tx_int_delay
| E1000_TIDV_FPD
);
1044 /* execute the writes immediately */
1046 adapter
->tx_hang_recheck
= true;
1049 /* Real hang detected */
1050 adapter
->tx_hang_recheck
= false;
1051 netif_stop_queue(netdev
);
1053 e1e_rphy(hw
, PHY_STATUS
, &phy_status
);
1054 e1e_rphy(hw
, PHY_1000T_STATUS
, &phy_1000t_status
);
1055 e1e_rphy(hw
, PHY_EXT_STATUS
, &phy_ext_status
);
1057 pci_read_config_word(adapter
->pdev
, PCI_STATUS
, &pci_status
);
1059 /* detected Hardware unit hang */
1060 e_err("Detected Hardware Unit Hang:\n"
1063 " next_to_use <%x>\n"
1064 " next_to_clean <%x>\n"
1065 "buffer_info[next_to_clean]:\n"
1066 " time_stamp <%lx>\n"
1067 " next_to_watch <%x>\n"
1069 " next_to_watch.status <%x>\n"
1072 "PHY 1000BASE-T Status <%x>\n"
1073 "PHY Extended Status <%x>\n"
1074 "PCI Status <%x>\n",
1075 readl(tx_ring
->head
),
1076 readl(tx_ring
->tail
),
1077 tx_ring
->next_to_use
,
1078 tx_ring
->next_to_clean
,
1079 tx_ring
->buffer_info
[eop
].time_stamp
,
1082 eop_desc
->upper
.fields
.status
,
1089 /* Suggest workaround for known h/w issue */
1090 if ((hw
->mac
.type
== e1000_pchlan
) && (er32(CTRL
) & E1000_CTRL_TFCE
))
1091 e_err("Try turning off Tx pause (flow control) via ethtool\n");
1095 * e1000_clean_tx_irq - Reclaim resources after transmit completes
1096 * @tx_ring: Tx descriptor ring
1098 * the return value indicates whether actual cleaning was done, there
1099 * is no guarantee that everything was cleaned
1101 static bool e1000_clean_tx_irq(struct e1000_ring
*tx_ring
)
1103 struct e1000_adapter
*adapter
= tx_ring
->adapter
;
1104 struct net_device
*netdev
= adapter
->netdev
;
1105 struct e1000_hw
*hw
= &adapter
->hw
;
1106 struct e1000_tx_desc
*tx_desc
, *eop_desc
;
1107 struct e1000_buffer
*buffer_info
;
1108 unsigned int i
, eop
;
1109 unsigned int count
= 0;
1110 unsigned int total_tx_bytes
= 0, total_tx_packets
= 0;
1111 unsigned int bytes_compl
= 0, pkts_compl
= 0;
1113 i
= tx_ring
->next_to_clean
;
1114 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1115 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
1117 while ((eop_desc
->upper
.data
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
1118 (count
< tx_ring
->count
)) {
1119 bool cleaned
= false;
1120 rmb(); /* read buffer_info after eop_desc */
1121 for (; !cleaned
; count
++) {
1122 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
1123 buffer_info
= &tx_ring
->buffer_info
[i
];
1124 cleaned
= (i
== eop
);
1127 total_tx_packets
+= buffer_info
->segs
;
1128 total_tx_bytes
+= buffer_info
->bytecount
;
1129 if (buffer_info
->skb
) {
1130 bytes_compl
+= buffer_info
->skb
->len
;
1135 e1000_put_txbuf(tx_ring
, buffer_info
);
1136 tx_desc
->upper
.data
= 0;
1139 if (i
== tx_ring
->count
)
1143 if (i
== tx_ring
->next_to_use
)
1145 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1146 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
1149 tx_ring
->next_to_clean
= i
;
1151 netdev_completed_queue(netdev
, pkts_compl
, bytes_compl
);
1153 #define TX_WAKE_THRESHOLD 32
1154 if (count
&& netif_carrier_ok(netdev
) &&
1155 e1000_desc_unused(tx_ring
) >= TX_WAKE_THRESHOLD
) {
1156 /* Make sure that anybody stopping the queue after this
1157 * sees the new next_to_clean.
1161 if (netif_queue_stopped(netdev
) &&
1162 !(test_bit(__E1000_DOWN
, &adapter
->state
))) {
1163 netif_wake_queue(netdev
);
1164 ++adapter
->restart_queue
;
1168 if (adapter
->detect_tx_hung
) {
1170 * Detect a transmit hang in hardware, this serializes the
1171 * check with the clearing of time_stamp and movement of i
1173 adapter
->detect_tx_hung
= false;
1174 if (tx_ring
->buffer_info
[i
].time_stamp
&&
1175 time_after(jiffies
, tx_ring
->buffer_info
[i
].time_stamp
1176 + (adapter
->tx_timeout_factor
* HZ
)) &&
1177 !(er32(STATUS
) & E1000_STATUS_TXOFF
))
1178 schedule_work(&adapter
->print_hang_task
);
1180 adapter
->tx_hang_recheck
= false;
1182 adapter
->total_tx_bytes
+= total_tx_bytes
;
1183 adapter
->total_tx_packets
+= total_tx_packets
;
1184 return count
< tx_ring
->count
;
1188 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
1189 * @rx_ring: Rx descriptor ring
1191 * the return value indicates whether actual cleaning was done, there
1192 * is no guarantee that everything was cleaned
1194 static bool e1000_clean_rx_irq_ps(struct e1000_ring
*rx_ring
, int *work_done
,
1197 struct e1000_adapter
*adapter
= rx_ring
->adapter
;
1198 struct e1000_hw
*hw
= &adapter
->hw
;
1199 union e1000_rx_desc_packet_split
*rx_desc
, *next_rxd
;
1200 struct net_device
*netdev
= adapter
->netdev
;
1201 struct pci_dev
*pdev
= adapter
->pdev
;
1202 struct e1000_buffer
*buffer_info
, *next_buffer
;
1203 struct e1000_ps_page
*ps_page
;
1204 struct sk_buff
*skb
;
1206 u32 length
, staterr
;
1207 int cleaned_count
= 0;
1208 bool cleaned
= false;
1209 unsigned int total_rx_bytes
= 0, total_rx_packets
= 0;
1211 i
= rx_ring
->next_to_clean
;
1212 rx_desc
= E1000_RX_DESC_PS(*rx_ring
, i
);
1213 staterr
= le32_to_cpu(rx_desc
->wb
.middle
.status_error
);
1214 buffer_info
= &rx_ring
->buffer_info
[i
];
1216 while (staterr
& E1000_RXD_STAT_DD
) {
1217 if (*work_done
>= work_to_do
)
1220 skb
= buffer_info
->skb
;
1221 rmb(); /* read descriptor and rx_buffer_info after status DD */
1223 /* in the packet split case this is header only */
1224 prefetch(skb
->data
- NET_IP_ALIGN
);
1227 if (i
== rx_ring
->count
)
1229 next_rxd
= E1000_RX_DESC_PS(*rx_ring
, i
);
1232 next_buffer
= &rx_ring
->buffer_info
[i
];
1236 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
1237 adapter
->rx_ps_bsize0
, DMA_FROM_DEVICE
);
1238 buffer_info
->dma
= 0;
1240 /* see !EOP comment in other Rx routine */
1241 if (!(staterr
& E1000_RXD_STAT_EOP
))
1242 adapter
->flags2
|= FLAG2_IS_DISCARDING
;
1244 if (adapter
->flags2
& FLAG2_IS_DISCARDING
) {
1245 e_dbg("Packet Split buffers didn't pick up the full packet\n");
1246 dev_kfree_skb_irq(skb
);
1247 if (staterr
& E1000_RXD_STAT_EOP
)
1248 adapter
->flags2
&= ~FLAG2_IS_DISCARDING
;
1252 if (unlikely((staterr
& E1000_RXDEXT_ERR_FRAME_ERR_MASK
) &&
1253 !(netdev
->features
& NETIF_F_RXALL
))) {
1254 dev_kfree_skb_irq(skb
);
1258 length
= le16_to_cpu(rx_desc
->wb
.middle
.length0
);
1261 e_dbg("Last part of the packet spanning multiple descriptors\n");
1262 dev_kfree_skb_irq(skb
);
1267 skb_put(skb
, length
);
1271 * this looks ugly, but it seems compiler issues make
1272 * it more efficient than reusing j
1274 int l1
= le16_to_cpu(rx_desc
->wb
.upper
.length
[0]);
1277 * page alloc/put takes too long and effects small
1278 * packet throughput, so unsplit small packets and
1279 * save the alloc/put only valid in softirq (napi)
1280 * context to call kmap_*
1282 if (l1
&& (l1
<= copybreak
) &&
1283 ((length
+ l1
) <= adapter
->rx_ps_bsize0
)) {
1286 ps_page
= &buffer_info
->ps_pages
[0];
1289 * there is no documentation about how to call
1290 * kmap_atomic, so we can't hold the mapping
1293 dma_sync_single_for_cpu(&pdev
->dev
,
1297 vaddr
= kmap_atomic(ps_page
->page
);
1298 memcpy(skb_tail_pointer(skb
), vaddr
, l1
);
1299 kunmap_atomic(vaddr
);
1300 dma_sync_single_for_device(&pdev
->dev
,
1305 /* remove the CRC */
1306 if (!(adapter
->flags2
& FLAG2_CRC_STRIPPING
)) {
1307 if (!(netdev
->features
& NETIF_F_RXFCS
))
1316 for (j
= 0; j
< PS_PAGE_BUFFERS
; j
++) {
1317 length
= le16_to_cpu(rx_desc
->wb
.upper
.length
[j
]);
1321 ps_page
= &buffer_info
->ps_pages
[j
];
1322 dma_unmap_page(&pdev
->dev
, ps_page
->dma
, PAGE_SIZE
,
1325 skb_fill_page_desc(skb
, j
, ps_page
->page
, 0, length
);
1326 ps_page
->page
= NULL
;
1328 skb
->data_len
+= length
;
1329 skb
->truesize
+= PAGE_SIZE
;
1332 /* strip the ethernet crc, problem is we're using pages now so
1333 * this whole operation can get a little cpu intensive
1335 if (!(adapter
->flags2
& FLAG2_CRC_STRIPPING
)) {
1336 if (!(netdev
->features
& NETIF_F_RXFCS
))
1337 pskb_trim(skb
, skb
->len
- 4);
1341 total_rx_bytes
+= skb
->len
;
1344 e1000_rx_checksum(adapter
, staterr
,
1345 rx_desc
->wb
.lower
.hi_dword
.csum_ip
.csum
, skb
);
1347 e1000_rx_hash(netdev
, rx_desc
->wb
.lower
.hi_dword
.rss
, skb
);
1349 if (rx_desc
->wb
.upper
.header_status
&
1350 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP
))
1351 adapter
->rx_hdr_split
++;
1353 e1000_receive_skb(adapter
, netdev
, skb
,
1354 staterr
, rx_desc
->wb
.middle
.vlan
);
1357 rx_desc
->wb
.middle
.status_error
&= cpu_to_le32(~0xFF);
1358 buffer_info
->skb
= NULL
;
1360 /* return some buffers to hardware, one at a time is too slow */
1361 if (cleaned_count
>= E1000_RX_BUFFER_WRITE
) {
1362 adapter
->alloc_rx_buf(rx_ring
, cleaned_count
,
1367 /* use prefetched values */
1369 buffer_info
= next_buffer
;
1371 staterr
= le32_to_cpu(rx_desc
->wb
.middle
.status_error
);
1373 rx_ring
->next_to_clean
= i
;
1375 cleaned_count
= e1000_desc_unused(rx_ring
);
1377 adapter
->alloc_rx_buf(rx_ring
, cleaned_count
, GFP_ATOMIC
);
1379 adapter
->total_rx_bytes
+= total_rx_bytes
;
1380 adapter
->total_rx_packets
+= total_rx_packets
;
1385 * e1000_consume_page - helper function
1387 static void e1000_consume_page(struct e1000_buffer
*bi
, struct sk_buff
*skb
,
1392 skb
->data_len
+= length
;
1393 skb
->truesize
+= PAGE_SIZE
;
1397 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
1398 * @adapter: board private structure
1400 * the return value indicates whether actual cleaning was done, there
1401 * is no guarantee that everything was cleaned
1403 static bool e1000_clean_jumbo_rx_irq(struct e1000_ring
*rx_ring
, int *work_done
,
1406 struct e1000_adapter
*adapter
= rx_ring
->adapter
;
1407 struct net_device
*netdev
= adapter
->netdev
;
1408 struct pci_dev
*pdev
= adapter
->pdev
;
1409 union e1000_rx_desc_extended
*rx_desc
, *next_rxd
;
1410 struct e1000_buffer
*buffer_info
, *next_buffer
;
1411 u32 length
, staterr
;
1413 int cleaned_count
= 0;
1414 bool cleaned
= false;
1415 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
1417 i
= rx_ring
->next_to_clean
;
1418 rx_desc
= E1000_RX_DESC_EXT(*rx_ring
, i
);
1419 staterr
= le32_to_cpu(rx_desc
->wb
.upper
.status_error
);
1420 buffer_info
= &rx_ring
->buffer_info
[i
];
1422 while (staterr
& E1000_RXD_STAT_DD
) {
1423 struct sk_buff
*skb
;
1425 if (*work_done
>= work_to_do
)
1428 rmb(); /* read descriptor and rx_buffer_info after status DD */
1430 skb
= buffer_info
->skb
;
1431 buffer_info
->skb
= NULL
;
1434 if (i
== rx_ring
->count
)
1436 next_rxd
= E1000_RX_DESC_EXT(*rx_ring
, i
);
1439 next_buffer
= &rx_ring
->buffer_info
[i
];
1443 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
, PAGE_SIZE
,
1445 buffer_info
->dma
= 0;
1447 length
= le16_to_cpu(rx_desc
->wb
.upper
.length
);
1449 /* errors is only valid for DD + EOP descriptors */
1450 if (unlikely((staterr
& E1000_RXD_STAT_EOP
) &&
1451 ((staterr
& E1000_RXDEXT_ERR_FRAME_ERR_MASK
) &&
1452 !(netdev
->features
& NETIF_F_RXALL
)))) {
1453 /* recycle both page and skb */
1454 buffer_info
->skb
= skb
;
1455 /* an error means any chain goes out the window too */
1456 if (rx_ring
->rx_skb_top
)
1457 dev_kfree_skb_irq(rx_ring
->rx_skb_top
);
1458 rx_ring
->rx_skb_top
= NULL
;
1462 #define rxtop (rx_ring->rx_skb_top)
1463 if (!(staterr
& E1000_RXD_STAT_EOP
)) {
1464 /* this descriptor is only the beginning (or middle) */
1466 /* this is the beginning of a chain */
1468 skb_fill_page_desc(rxtop
, 0, buffer_info
->page
,
1471 /* this is the middle of a chain */
1472 skb_fill_page_desc(rxtop
,
1473 skb_shinfo(rxtop
)->nr_frags
,
1474 buffer_info
->page
, 0, length
);
1475 /* re-use the skb, only consumed the page */
1476 buffer_info
->skb
= skb
;
1478 e1000_consume_page(buffer_info
, rxtop
, length
);
1482 /* end of the chain */
1483 skb_fill_page_desc(rxtop
,
1484 skb_shinfo(rxtop
)->nr_frags
,
1485 buffer_info
->page
, 0, length
);
1486 /* re-use the current skb, we only consumed the
1488 buffer_info
->skb
= skb
;
1491 e1000_consume_page(buffer_info
, skb
, length
);
1493 /* no chain, got EOP, this buf is the packet
1494 * copybreak to save the put_page/alloc_page */
1495 if (length
<= copybreak
&&
1496 skb_tailroom(skb
) >= length
) {
1498 vaddr
= kmap_atomic(buffer_info
->page
);
1499 memcpy(skb_tail_pointer(skb
), vaddr
,
1501 kunmap_atomic(vaddr
);
1502 /* re-use the page, so don't erase
1503 * buffer_info->page */
1504 skb_put(skb
, length
);
1506 skb_fill_page_desc(skb
, 0,
1507 buffer_info
->page
, 0,
1509 e1000_consume_page(buffer_info
, skb
,
1515 /* Receive Checksum Offload XXX recompute due to CRC strip? */
1516 e1000_rx_checksum(adapter
, staterr
,
1517 rx_desc
->wb
.lower
.hi_dword
.csum_ip
.csum
, skb
);
1519 e1000_rx_hash(netdev
, rx_desc
->wb
.lower
.hi_dword
.rss
, skb
);
1521 /* probably a little skewed due to removing CRC */
1522 total_rx_bytes
+= skb
->len
;
1525 /* eth type trans needs skb->data to point to something */
1526 if (!pskb_may_pull(skb
, ETH_HLEN
)) {
1527 e_err("pskb_may_pull failed.\n");
1528 dev_kfree_skb_irq(skb
);
1532 e1000_receive_skb(adapter
, netdev
, skb
, staterr
,
1533 rx_desc
->wb
.upper
.vlan
);
1536 rx_desc
->wb
.upper
.status_error
&= cpu_to_le32(~0xFF);
1538 /* return some buffers to hardware, one at a time is too slow */
1539 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
1540 adapter
->alloc_rx_buf(rx_ring
, cleaned_count
,
1545 /* use prefetched values */
1547 buffer_info
= next_buffer
;
1549 staterr
= le32_to_cpu(rx_desc
->wb
.upper
.status_error
);
1551 rx_ring
->next_to_clean
= i
;
1553 cleaned_count
= e1000_desc_unused(rx_ring
);
1555 adapter
->alloc_rx_buf(rx_ring
, cleaned_count
, GFP_ATOMIC
);
1557 adapter
->total_rx_bytes
+= total_rx_bytes
;
1558 adapter
->total_rx_packets
+= total_rx_packets
;
1563 * e1000_clean_rx_ring - Free Rx Buffers per Queue
1564 * @rx_ring: Rx descriptor ring
1566 static void e1000_clean_rx_ring(struct e1000_ring
*rx_ring
)
1568 struct e1000_adapter
*adapter
= rx_ring
->adapter
;
1569 struct e1000_buffer
*buffer_info
;
1570 struct e1000_ps_page
*ps_page
;
1571 struct pci_dev
*pdev
= adapter
->pdev
;
1574 /* Free all the Rx ring sk_buffs */
1575 for (i
= 0; i
< rx_ring
->count
; i
++) {
1576 buffer_info
= &rx_ring
->buffer_info
[i
];
1577 if (buffer_info
->dma
) {
1578 if (adapter
->clean_rx
== e1000_clean_rx_irq
)
1579 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
1580 adapter
->rx_buffer_len
,
1582 else if (adapter
->clean_rx
== e1000_clean_jumbo_rx_irq
)
1583 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
,
1586 else if (adapter
->clean_rx
== e1000_clean_rx_irq_ps
)
1587 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
1588 adapter
->rx_ps_bsize0
,
1590 buffer_info
->dma
= 0;
1593 if (buffer_info
->page
) {
1594 put_page(buffer_info
->page
);
1595 buffer_info
->page
= NULL
;
1598 if (buffer_info
->skb
) {
1599 dev_kfree_skb(buffer_info
->skb
);
1600 buffer_info
->skb
= NULL
;
1603 for (j
= 0; j
< PS_PAGE_BUFFERS
; j
++) {
1604 ps_page
= &buffer_info
->ps_pages
[j
];
1607 dma_unmap_page(&pdev
->dev
, ps_page
->dma
, PAGE_SIZE
,
1610 put_page(ps_page
->page
);
1611 ps_page
->page
= NULL
;
1615 /* there also may be some cached data from a chained receive */
1616 if (rx_ring
->rx_skb_top
) {
1617 dev_kfree_skb(rx_ring
->rx_skb_top
);
1618 rx_ring
->rx_skb_top
= NULL
;
1621 /* Zero out the descriptor ring */
1622 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1624 rx_ring
->next_to_clean
= 0;
1625 rx_ring
->next_to_use
= 0;
1626 adapter
->flags2
&= ~FLAG2_IS_DISCARDING
;
1628 writel(0, rx_ring
->head
);
1629 if (rx_ring
->adapter
->flags2
& FLAG2_PCIM2PCI_ARBITER_WA
)
1630 e1000e_update_rdt_wa(rx_ring
, 0);
1632 writel(0, rx_ring
->tail
);
1635 static void e1000e_downshift_workaround(struct work_struct
*work
)
1637 struct e1000_adapter
*adapter
= container_of(work
,
1638 struct e1000_adapter
, downshift_task
);
1640 if (test_bit(__E1000_DOWN
, &adapter
->state
))
1643 e1000e_gig_downshift_workaround_ich8lan(&adapter
->hw
);
1647 * e1000_intr_msi - Interrupt Handler
1648 * @irq: interrupt number
1649 * @data: pointer to a network interface device structure
1651 static irqreturn_t
e1000_intr_msi(int irq
, void *data
)
1653 struct net_device
*netdev
= data
;
1654 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1655 struct e1000_hw
*hw
= &adapter
->hw
;
1656 u32 icr
= er32(ICR
);
1659 * read ICR disables interrupts using IAM
1662 if (icr
& E1000_ICR_LSC
) {
1663 hw
->mac
.get_link_status
= true;
1665 * ICH8 workaround-- Call gig speed drop workaround on cable
1666 * disconnect (LSC) before accessing any PHY registers
1668 if ((adapter
->flags
& FLAG_LSC_GIG_SPEED_DROP
) &&
1669 (!(er32(STATUS
) & E1000_STATUS_LU
)))
1670 schedule_work(&adapter
->downshift_task
);
1673 * 80003ES2LAN workaround-- For packet buffer work-around on
1674 * link down event; disable receives here in the ISR and reset
1675 * adapter in watchdog
1677 if (netif_carrier_ok(netdev
) &&
1678 adapter
->flags
& FLAG_RX_NEEDS_RESTART
) {
1679 /* disable receives */
1680 u32 rctl
= er32(RCTL
);
1681 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
1682 adapter
->flags
|= FLAG_RX_RESTART_NOW
;
1684 /* guard against interrupt when we're going down */
1685 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1686 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1689 if (napi_schedule_prep(&adapter
->napi
)) {
1690 adapter
->total_tx_bytes
= 0;
1691 adapter
->total_tx_packets
= 0;
1692 adapter
->total_rx_bytes
= 0;
1693 adapter
->total_rx_packets
= 0;
1694 __napi_schedule(&adapter
->napi
);
1701 * e1000_intr - Interrupt Handler
1702 * @irq: interrupt number
1703 * @data: pointer to a network interface device structure
1705 static irqreturn_t
e1000_intr(int irq
, void *data
)
1707 struct net_device
*netdev
= data
;
1708 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1709 struct e1000_hw
*hw
= &adapter
->hw
;
1710 u32 rctl
, icr
= er32(ICR
);
1712 if (!icr
|| test_bit(__E1000_DOWN
, &adapter
->state
))
1713 return IRQ_NONE
; /* Not our interrupt */
1716 * IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1717 * not set, then the adapter didn't send an interrupt
1719 if (!(icr
& E1000_ICR_INT_ASSERTED
))
1723 * Interrupt Auto-Mask...upon reading ICR,
1724 * interrupts are masked. No need for the
1728 if (icr
& E1000_ICR_LSC
) {
1729 hw
->mac
.get_link_status
= true;
1731 * ICH8 workaround-- Call gig speed drop workaround on cable
1732 * disconnect (LSC) before accessing any PHY registers
1734 if ((adapter
->flags
& FLAG_LSC_GIG_SPEED_DROP
) &&
1735 (!(er32(STATUS
) & E1000_STATUS_LU
)))
1736 schedule_work(&adapter
->downshift_task
);
1739 * 80003ES2LAN workaround--
1740 * For packet buffer work-around on link down event;
1741 * disable receives here in the ISR and
1742 * reset adapter in watchdog
1744 if (netif_carrier_ok(netdev
) &&
1745 (adapter
->flags
& FLAG_RX_NEEDS_RESTART
)) {
1746 /* disable receives */
1748 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
1749 adapter
->flags
|= FLAG_RX_RESTART_NOW
;
1751 /* guard against interrupt when we're going down */
1752 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1753 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1756 if (napi_schedule_prep(&adapter
->napi
)) {
1757 adapter
->total_tx_bytes
= 0;
1758 adapter
->total_tx_packets
= 0;
1759 adapter
->total_rx_bytes
= 0;
1760 adapter
->total_rx_packets
= 0;
1761 __napi_schedule(&adapter
->napi
);
1767 static irqreturn_t
e1000_msix_other(int irq
, void *data
)
1769 struct net_device
*netdev
= data
;
1770 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1771 struct e1000_hw
*hw
= &adapter
->hw
;
1772 u32 icr
= er32(ICR
);
1774 if (!(icr
& E1000_ICR_INT_ASSERTED
)) {
1775 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1776 ew32(IMS
, E1000_IMS_OTHER
);
1780 if (icr
& adapter
->eiac_mask
)
1781 ew32(ICS
, (icr
& adapter
->eiac_mask
));
1783 if (icr
& E1000_ICR_OTHER
) {
1784 if (!(icr
& E1000_ICR_LSC
))
1785 goto no_link_interrupt
;
1786 hw
->mac
.get_link_status
= true;
1787 /* guard against interrupt when we're going down */
1788 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1789 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1793 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1794 ew32(IMS
, E1000_IMS_LSC
| E1000_IMS_OTHER
);
1800 static irqreturn_t
e1000_intr_msix_tx(int irq
, void *data
)
1802 struct net_device
*netdev
= data
;
1803 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1804 struct e1000_hw
*hw
= &adapter
->hw
;
1805 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1808 adapter
->total_tx_bytes
= 0;
1809 adapter
->total_tx_packets
= 0;
1811 if (!e1000_clean_tx_irq(tx_ring
))
1812 /* Ring was not completely cleaned, so fire another interrupt */
1813 ew32(ICS
, tx_ring
->ims_val
);
1818 static irqreturn_t
e1000_intr_msix_rx(int irq
, void *data
)
1820 struct net_device
*netdev
= data
;
1821 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1822 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
1824 /* Write the ITR value calculated at the end of the
1825 * previous interrupt.
1827 if (rx_ring
->set_itr
) {
1828 writel(1000000000 / (rx_ring
->itr_val
* 256),
1829 rx_ring
->itr_register
);
1830 rx_ring
->set_itr
= 0;
1833 if (napi_schedule_prep(&adapter
->napi
)) {
1834 adapter
->total_rx_bytes
= 0;
1835 adapter
->total_rx_packets
= 0;
1836 __napi_schedule(&adapter
->napi
);
1842 * e1000_configure_msix - Configure MSI-X hardware
1844 * e1000_configure_msix sets up the hardware to properly
1845 * generate MSI-X interrupts.
1847 static void e1000_configure_msix(struct e1000_adapter
*adapter
)
1849 struct e1000_hw
*hw
= &adapter
->hw
;
1850 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
1851 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1853 u32 ctrl_ext
, ivar
= 0;
1855 adapter
->eiac_mask
= 0;
1857 /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1858 if (hw
->mac
.type
== e1000_82574
) {
1859 u32 rfctl
= er32(RFCTL
);
1860 rfctl
|= E1000_RFCTL_ACK_DIS
;
1864 #define E1000_IVAR_INT_ALLOC_VALID 0x8
1865 /* Configure Rx vector */
1866 rx_ring
->ims_val
= E1000_IMS_RXQ0
;
1867 adapter
->eiac_mask
|= rx_ring
->ims_val
;
1868 if (rx_ring
->itr_val
)
1869 writel(1000000000 / (rx_ring
->itr_val
* 256),
1870 rx_ring
->itr_register
);
1872 writel(1, rx_ring
->itr_register
);
1873 ivar
= E1000_IVAR_INT_ALLOC_VALID
| vector
;
1875 /* Configure Tx vector */
1876 tx_ring
->ims_val
= E1000_IMS_TXQ0
;
1878 if (tx_ring
->itr_val
)
1879 writel(1000000000 / (tx_ring
->itr_val
* 256),
1880 tx_ring
->itr_register
);
1882 writel(1, tx_ring
->itr_register
);
1883 adapter
->eiac_mask
|= tx_ring
->ims_val
;
1884 ivar
|= ((E1000_IVAR_INT_ALLOC_VALID
| vector
) << 8);
1886 /* set vector for Other Causes, e.g. link changes */
1888 ivar
|= ((E1000_IVAR_INT_ALLOC_VALID
| vector
) << 16);
1889 if (rx_ring
->itr_val
)
1890 writel(1000000000 / (rx_ring
->itr_val
* 256),
1891 hw
->hw_addr
+ E1000_EITR_82574(vector
));
1893 writel(1, hw
->hw_addr
+ E1000_EITR_82574(vector
));
1895 /* Cause Tx interrupts on every write back */
1900 /* enable MSI-X PBA support */
1901 ctrl_ext
= er32(CTRL_EXT
);
1902 ctrl_ext
|= E1000_CTRL_EXT_PBA_CLR
;
1904 /* Auto-Mask Other interrupts upon ICR read */
1905 #define E1000_EIAC_MASK_82574 0x01F00000
1906 ew32(IAM
, ~E1000_EIAC_MASK_82574
| E1000_IMS_OTHER
);
1907 ctrl_ext
|= E1000_CTRL_EXT_EIAME
;
1908 ew32(CTRL_EXT
, ctrl_ext
);
1912 void e1000e_reset_interrupt_capability(struct e1000_adapter
*adapter
)
1914 if (adapter
->msix_entries
) {
1915 pci_disable_msix(adapter
->pdev
);
1916 kfree(adapter
->msix_entries
);
1917 adapter
->msix_entries
= NULL
;
1918 } else if (adapter
->flags
& FLAG_MSI_ENABLED
) {
1919 pci_disable_msi(adapter
->pdev
);
1920 adapter
->flags
&= ~FLAG_MSI_ENABLED
;
1925 * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
1927 * Attempt to configure interrupts using the best available
1928 * capabilities of the hardware and kernel.
1930 void e1000e_set_interrupt_capability(struct e1000_adapter
*adapter
)
1935 switch (adapter
->int_mode
) {
1936 case E1000E_INT_MODE_MSIX
:
1937 if (adapter
->flags
& FLAG_HAS_MSIX
) {
1938 adapter
->num_vectors
= 3; /* RxQ0, TxQ0 and other */
1939 adapter
->msix_entries
= kcalloc(adapter
->num_vectors
,
1940 sizeof(struct msix_entry
),
1942 if (adapter
->msix_entries
) {
1943 for (i
= 0; i
< adapter
->num_vectors
; i
++)
1944 adapter
->msix_entries
[i
].entry
= i
;
1946 err
= pci_enable_msix(adapter
->pdev
,
1947 adapter
->msix_entries
,
1948 adapter
->num_vectors
);
1952 /* MSI-X failed, so fall through and try MSI */
1953 e_err("Failed to initialize MSI-X interrupts. Falling back to MSI interrupts.\n");
1954 e1000e_reset_interrupt_capability(adapter
);
1956 adapter
->int_mode
= E1000E_INT_MODE_MSI
;
1958 case E1000E_INT_MODE_MSI
:
1959 if (!pci_enable_msi(adapter
->pdev
)) {
1960 adapter
->flags
|= FLAG_MSI_ENABLED
;
1962 adapter
->int_mode
= E1000E_INT_MODE_LEGACY
;
1963 e_err("Failed to initialize MSI interrupts. Falling back to legacy interrupts.\n");
1966 case E1000E_INT_MODE_LEGACY
:
1967 /* Don't do anything; this is the system default */
1971 /* store the number of vectors being used */
1972 adapter
->num_vectors
= 1;
1976 * e1000_request_msix - Initialize MSI-X interrupts
1978 * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
1981 static int e1000_request_msix(struct e1000_adapter
*adapter
)
1983 struct net_device
*netdev
= adapter
->netdev
;
1984 int err
= 0, vector
= 0;
1986 if (strlen(netdev
->name
) < (IFNAMSIZ
- 5))
1987 snprintf(adapter
->rx_ring
->name
,
1988 sizeof(adapter
->rx_ring
->name
) - 1,
1989 "%s-rx-0", netdev
->name
);
1991 memcpy(adapter
->rx_ring
->name
, netdev
->name
, IFNAMSIZ
);
1992 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1993 e1000_intr_msix_rx
, 0, adapter
->rx_ring
->name
,
1997 adapter
->rx_ring
->itr_register
= adapter
->hw
.hw_addr
+
1998 E1000_EITR_82574(vector
);
1999 adapter
->rx_ring
->itr_val
= adapter
->itr
;
2002 if (strlen(netdev
->name
) < (IFNAMSIZ
- 5))
2003 snprintf(adapter
->tx_ring
->name
,
2004 sizeof(adapter
->tx_ring
->name
) - 1,
2005 "%s-tx-0", netdev
->name
);
2007 memcpy(adapter
->tx_ring
->name
, netdev
->name
, IFNAMSIZ
);
2008 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
2009 e1000_intr_msix_tx
, 0, adapter
->tx_ring
->name
,
2013 adapter
->tx_ring
->itr_register
= adapter
->hw
.hw_addr
+
2014 E1000_EITR_82574(vector
);
2015 adapter
->tx_ring
->itr_val
= adapter
->itr
;
2018 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
2019 e1000_msix_other
, 0, netdev
->name
, netdev
);
2023 e1000_configure_msix(adapter
);
2029 * e1000_request_irq - initialize interrupts
2031 * Attempts to configure interrupts using the best available
2032 * capabilities of the hardware and kernel.
2034 static int e1000_request_irq(struct e1000_adapter
*adapter
)
2036 struct net_device
*netdev
= adapter
->netdev
;
2039 if (adapter
->msix_entries
) {
2040 err
= e1000_request_msix(adapter
);
2043 /* fall back to MSI */
2044 e1000e_reset_interrupt_capability(adapter
);
2045 adapter
->int_mode
= E1000E_INT_MODE_MSI
;
2046 e1000e_set_interrupt_capability(adapter
);
2048 if (adapter
->flags
& FLAG_MSI_ENABLED
) {
2049 err
= request_irq(adapter
->pdev
->irq
, e1000_intr_msi
, 0,
2050 netdev
->name
, netdev
);
2054 /* fall back to legacy interrupt */
2055 e1000e_reset_interrupt_capability(adapter
);
2056 adapter
->int_mode
= E1000E_INT_MODE_LEGACY
;
2059 err
= request_irq(adapter
->pdev
->irq
, e1000_intr
, IRQF_SHARED
,
2060 netdev
->name
, netdev
);
2062 e_err("Unable to allocate interrupt, Error: %d\n", err
);
2067 static void e1000_free_irq(struct e1000_adapter
*adapter
)
2069 struct net_device
*netdev
= adapter
->netdev
;
2071 if (adapter
->msix_entries
) {
2074 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
2077 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
2080 /* Other Causes interrupt vector */
2081 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
2085 free_irq(adapter
->pdev
->irq
, netdev
);
2089 * e1000_irq_disable - Mask off interrupt generation on the NIC
2091 static void e1000_irq_disable(struct e1000_adapter
*adapter
)
2093 struct e1000_hw
*hw
= &adapter
->hw
;
2096 if (adapter
->msix_entries
)
2097 ew32(EIAC_82574
, 0);
2100 if (adapter
->msix_entries
) {
2102 for (i
= 0; i
< adapter
->num_vectors
; i
++)
2103 synchronize_irq(adapter
->msix_entries
[i
].vector
);
2105 synchronize_irq(adapter
->pdev
->irq
);
2110 * e1000_irq_enable - Enable default interrupt generation settings
2112 static void e1000_irq_enable(struct e1000_adapter
*adapter
)
2114 struct e1000_hw
*hw
= &adapter
->hw
;
2116 if (adapter
->msix_entries
) {
2117 ew32(EIAC_82574
, adapter
->eiac_mask
& E1000_EIAC_MASK_82574
);
2118 ew32(IMS
, adapter
->eiac_mask
| E1000_IMS_OTHER
| E1000_IMS_LSC
);
2120 ew32(IMS
, IMS_ENABLE_MASK
);
2126 * e1000e_get_hw_control - get control of the h/w from f/w
2127 * @adapter: address of board private structure
2129 * e1000e_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
2130 * For ASF and Pass Through versions of f/w this means that
2131 * the driver is loaded. For AMT version (only with 82573)
2132 * of the f/w this means that the network i/f is open.
2134 void e1000e_get_hw_control(struct e1000_adapter
*adapter
)
2136 struct e1000_hw
*hw
= &adapter
->hw
;
2140 /* Let firmware know the driver has taken over */
2141 if (adapter
->flags
& FLAG_HAS_SWSM_ON_LOAD
) {
2143 ew32(SWSM
, swsm
| E1000_SWSM_DRV_LOAD
);
2144 } else if (adapter
->flags
& FLAG_HAS_CTRLEXT_ON_LOAD
) {
2145 ctrl_ext
= er32(CTRL_EXT
);
2146 ew32(CTRL_EXT
, ctrl_ext
| E1000_CTRL_EXT_DRV_LOAD
);
2151 * e1000e_release_hw_control - release control of the h/w to f/w
2152 * @adapter: address of board private structure
2154 * e1000e_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
2155 * For ASF and Pass Through versions of f/w this means that the
2156 * driver is no longer loaded. For AMT version (only with 82573) i
2157 * of the f/w this means that the network i/f is closed.
2160 void e1000e_release_hw_control(struct e1000_adapter
*adapter
)
2162 struct e1000_hw
*hw
= &adapter
->hw
;
2166 /* Let firmware taken over control of h/w */
2167 if (adapter
->flags
& FLAG_HAS_SWSM_ON_LOAD
) {
2169 ew32(SWSM
, swsm
& ~E1000_SWSM_DRV_LOAD
);
2170 } else if (adapter
->flags
& FLAG_HAS_CTRLEXT_ON_LOAD
) {
2171 ctrl_ext
= er32(CTRL_EXT
);
2172 ew32(CTRL_EXT
, ctrl_ext
& ~E1000_CTRL_EXT_DRV_LOAD
);
2177 * @e1000_alloc_ring - allocate memory for a ring structure
2179 static int e1000_alloc_ring_dma(struct e1000_adapter
*adapter
,
2180 struct e1000_ring
*ring
)
2182 struct pci_dev
*pdev
= adapter
->pdev
;
2184 ring
->desc
= dma_alloc_coherent(&pdev
->dev
, ring
->size
, &ring
->dma
,
2193 * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
2194 * @tx_ring: Tx descriptor ring
2196 * Return 0 on success, negative on failure
2198 int e1000e_setup_tx_resources(struct e1000_ring
*tx_ring
)
2200 struct e1000_adapter
*adapter
= tx_ring
->adapter
;
2201 int err
= -ENOMEM
, size
;
2203 size
= sizeof(struct e1000_buffer
) * tx_ring
->count
;
2204 tx_ring
->buffer_info
= vzalloc(size
);
2205 if (!tx_ring
->buffer_info
)
2208 /* round up to nearest 4K */
2209 tx_ring
->size
= tx_ring
->count
* sizeof(struct e1000_tx_desc
);
2210 tx_ring
->size
= ALIGN(tx_ring
->size
, 4096);
2212 err
= e1000_alloc_ring_dma(adapter
, tx_ring
);
2216 tx_ring
->next_to_use
= 0;
2217 tx_ring
->next_to_clean
= 0;
2221 vfree(tx_ring
->buffer_info
);
2222 e_err("Unable to allocate memory for the transmit descriptor ring\n");
2227 * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
2228 * @rx_ring: Rx descriptor ring
2230 * Returns 0 on success, negative on failure
2232 int e1000e_setup_rx_resources(struct e1000_ring
*rx_ring
)
2234 struct e1000_adapter
*adapter
= rx_ring
->adapter
;
2235 struct e1000_buffer
*buffer_info
;
2236 int i
, size
, desc_len
, err
= -ENOMEM
;
2238 size
= sizeof(struct e1000_buffer
) * rx_ring
->count
;
2239 rx_ring
->buffer_info
= vzalloc(size
);
2240 if (!rx_ring
->buffer_info
)
2243 for (i
= 0; i
< rx_ring
->count
; i
++) {
2244 buffer_info
= &rx_ring
->buffer_info
[i
];
2245 buffer_info
->ps_pages
= kcalloc(PS_PAGE_BUFFERS
,
2246 sizeof(struct e1000_ps_page
),
2248 if (!buffer_info
->ps_pages
)
2252 desc_len
= sizeof(union e1000_rx_desc_packet_split
);
2254 /* Round up to nearest 4K */
2255 rx_ring
->size
= rx_ring
->count
* desc_len
;
2256 rx_ring
->size
= ALIGN(rx_ring
->size
, 4096);
2258 err
= e1000_alloc_ring_dma(adapter
, rx_ring
);
2262 rx_ring
->next_to_clean
= 0;
2263 rx_ring
->next_to_use
= 0;
2264 rx_ring
->rx_skb_top
= NULL
;
2269 for (i
= 0; i
< rx_ring
->count
; i
++) {
2270 buffer_info
= &rx_ring
->buffer_info
[i
];
2271 kfree(buffer_info
->ps_pages
);
2274 vfree(rx_ring
->buffer_info
);
2275 e_err("Unable to allocate memory for the receive descriptor ring\n");
2280 * e1000_clean_tx_ring - Free Tx Buffers
2281 * @tx_ring: Tx descriptor ring
2283 static void e1000_clean_tx_ring(struct e1000_ring
*tx_ring
)
2285 struct e1000_adapter
*adapter
= tx_ring
->adapter
;
2286 struct e1000_buffer
*buffer_info
;
2290 for (i
= 0; i
< tx_ring
->count
; i
++) {
2291 buffer_info
= &tx_ring
->buffer_info
[i
];
2292 e1000_put_txbuf(tx_ring
, buffer_info
);
2295 netdev_reset_queue(adapter
->netdev
);
2296 size
= sizeof(struct e1000_buffer
) * tx_ring
->count
;
2297 memset(tx_ring
->buffer_info
, 0, size
);
2299 memset(tx_ring
->desc
, 0, tx_ring
->size
);
2301 tx_ring
->next_to_use
= 0;
2302 tx_ring
->next_to_clean
= 0;
2304 writel(0, tx_ring
->head
);
2305 if (tx_ring
->adapter
->flags2
& FLAG2_PCIM2PCI_ARBITER_WA
)
2306 e1000e_update_tdt_wa(tx_ring
, 0);
2308 writel(0, tx_ring
->tail
);
2312 * e1000e_free_tx_resources - Free Tx Resources per Queue
2313 * @tx_ring: Tx descriptor ring
2315 * Free all transmit software resources
2317 void e1000e_free_tx_resources(struct e1000_ring
*tx_ring
)
2319 struct e1000_adapter
*adapter
= tx_ring
->adapter
;
2320 struct pci_dev
*pdev
= adapter
->pdev
;
2322 e1000_clean_tx_ring(tx_ring
);
2324 vfree(tx_ring
->buffer_info
);
2325 tx_ring
->buffer_info
= NULL
;
2327 dma_free_coherent(&pdev
->dev
, tx_ring
->size
, tx_ring
->desc
,
2329 tx_ring
->desc
= NULL
;
2333 * e1000e_free_rx_resources - Free Rx Resources
2334 * @rx_ring: Rx descriptor ring
2336 * Free all receive software resources
2338 void e1000e_free_rx_resources(struct e1000_ring
*rx_ring
)
2340 struct e1000_adapter
*adapter
= rx_ring
->adapter
;
2341 struct pci_dev
*pdev
= adapter
->pdev
;
2344 e1000_clean_rx_ring(rx_ring
);
2346 for (i
= 0; i
< rx_ring
->count
; i
++)
2347 kfree(rx_ring
->buffer_info
[i
].ps_pages
);
2349 vfree(rx_ring
->buffer_info
);
2350 rx_ring
->buffer_info
= NULL
;
2352 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
2354 rx_ring
->desc
= NULL
;
2358 * e1000_update_itr - update the dynamic ITR value based on statistics
2359 * @adapter: pointer to adapter
2360 * @itr_setting: current adapter->itr
2361 * @packets: the number of packets during this measurement interval
2362 * @bytes: the number of bytes during this measurement interval
2364 * Stores a new ITR value based on packets and byte
2365 * counts during the last interrupt. The advantage of per interrupt
2366 * computation is faster updates and more accurate ITR for the current
2367 * traffic pattern. Constants in this function were computed
2368 * based on theoretical maximum wire speed and thresholds were set based
2369 * on testing data as well as attempting to minimize response time
2370 * while increasing bulk throughput. This functionality is controlled
2371 * by the InterruptThrottleRate module parameter.
2373 static unsigned int e1000_update_itr(struct e1000_adapter
*adapter
,
2374 u16 itr_setting
, int packets
,
2377 unsigned int retval
= itr_setting
;
2382 switch (itr_setting
) {
2383 case lowest_latency
:
2384 /* handle TSO and jumbo frames */
2385 if (bytes
/packets
> 8000)
2386 retval
= bulk_latency
;
2387 else if ((packets
< 5) && (bytes
> 512))
2388 retval
= low_latency
;
2390 case low_latency
: /* 50 usec aka 20000 ints/s */
2391 if (bytes
> 10000) {
2392 /* this if handles the TSO accounting */
2393 if (bytes
/packets
> 8000)
2394 retval
= bulk_latency
;
2395 else if ((packets
< 10) || ((bytes
/packets
) > 1200))
2396 retval
= bulk_latency
;
2397 else if ((packets
> 35))
2398 retval
= lowest_latency
;
2399 } else if (bytes
/packets
> 2000) {
2400 retval
= bulk_latency
;
2401 } else if (packets
<= 2 && bytes
< 512) {
2402 retval
= lowest_latency
;
2405 case bulk_latency
: /* 250 usec aka 4000 ints/s */
2406 if (bytes
> 25000) {
2408 retval
= low_latency
;
2409 } else if (bytes
< 6000) {
2410 retval
= low_latency
;
2418 static void e1000_set_itr(struct e1000_adapter
*adapter
)
2420 struct e1000_hw
*hw
= &adapter
->hw
;
2422 u32 new_itr
= adapter
->itr
;
2424 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2425 if (adapter
->link_speed
!= SPEED_1000
) {
2431 if (adapter
->flags2
& FLAG2_DISABLE_AIM
) {
2436 adapter
->tx_itr
= e1000_update_itr(adapter
,
2438 adapter
->total_tx_packets
,
2439 adapter
->total_tx_bytes
);
2440 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2441 if (adapter
->itr_setting
== 3 && adapter
->tx_itr
== lowest_latency
)
2442 adapter
->tx_itr
= low_latency
;
2444 adapter
->rx_itr
= e1000_update_itr(adapter
,
2446 adapter
->total_rx_packets
,
2447 adapter
->total_rx_bytes
);
2448 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2449 if (adapter
->itr_setting
== 3 && adapter
->rx_itr
== lowest_latency
)
2450 adapter
->rx_itr
= low_latency
;
2452 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
2454 switch (current_itr
) {
2455 /* counts and packets in update_itr are dependent on these numbers */
2456 case lowest_latency
:
2460 new_itr
= 20000; /* aka hwitr = ~200 */
2470 if (new_itr
!= adapter
->itr
) {
2472 * this attempts to bias the interrupt rate towards Bulk
2473 * by adding intermediate steps when interrupt rate is
2476 new_itr
= new_itr
> adapter
->itr
?
2477 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
2479 adapter
->itr
= new_itr
;
2480 adapter
->rx_ring
->itr_val
= new_itr
;
2481 if (adapter
->msix_entries
)
2482 adapter
->rx_ring
->set_itr
= 1;
2485 ew32(ITR
, 1000000000 / (new_itr
* 256));
2492 * e1000_alloc_queues - Allocate memory for all rings
2493 * @adapter: board private structure to initialize
2495 static int __devinit
e1000_alloc_queues(struct e1000_adapter
*adapter
)
2497 int size
= sizeof(struct e1000_ring
);
2499 adapter
->tx_ring
= kzalloc(size
, GFP_KERNEL
);
2500 if (!adapter
->tx_ring
)
2502 adapter
->tx_ring
->count
= adapter
->tx_ring_count
;
2503 adapter
->tx_ring
->adapter
= adapter
;
2505 adapter
->rx_ring
= kzalloc(size
, GFP_KERNEL
);
2506 if (!adapter
->rx_ring
)
2508 adapter
->rx_ring
->count
= adapter
->rx_ring_count
;
2509 adapter
->rx_ring
->adapter
= adapter
;
2513 e_err("Unable to allocate memory for queues\n");
2514 kfree(adapter
->rx_ring
);
2515 kfree(adapter
->tx_ring
);
2520 * e1000e_poll - NAPI Rx polling callback
2521 * @napi: struct associated with this polling callback
2522 * @weight: number of packets driver is allowed to process this poll
2524 static int e1000e_poll(struct napi_struct
*napi
, int weight
)
2526 struct e1000_adapter
*adapter
= container_of(napi
, struct e1000_adapter
,
2528 struct e1000_hw
*hw
= &adapter
->hw
;
2529 struct net_device
*poll_dev
= adapter
->netdev
;
2530 int tx_cleaned
= 1, work_done
= 0;
2532 adapter
= netdev_priv(poll_dev
);
2534 if (!adapter
->msix_entries
||
2535 (adapter
->rx_ring
->ims_val
& adapter
->tx_ring
->ims_val
))
2536 tx_cleaned
= e1000_clean_tx_irq(adapter
->tx_ring
);
2538 adapter
->clean_rx(adapter
->rx_ring
, &work_done
, weight
);
2543 /* If weight not fully consumed, exit the polling mode */
2544 if (work_done
< weight
) {
2545 if (adapter
->itr_setting
& 3)
2546 e1000_set_itr(adapter
);
2547 napi_complete(napi
);
2548 if (!test_bit(__E1000_DOWN
, &adapter
->state
)) {
2549 if (adapter
->msix_entries
)
2550 ew32(IMS
, adapter
->rx_ring
->ims_val
);
2552 e1000_irq_enable(adapter
);
2559 static int e1000_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
2561 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2562 struct e1000_hw
*hw
= &adapter
->hw
;
2565 /* don't update vlan cookie if already programmed */
2566 if ((adapter
->hw
.mng_cookie
.status
&
2567 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
2568 (vid
== adapter
->mng_vlan_id
))
2571 /* add VID to filter table */
2572 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2573 index
= (vid
>> 5) & 0x7F;
2574 vfta
= E1000_READ_REG_ARRAY(hw
, E1000_VFTA
, index
);
2575 vfta
|= (1 << (vid
& 0x1F));
2576 hw
->mac
.ops
.write_vfta(hw
, index
, vfta
);
2579 set_bit(vid
, adapter
->active_vlans
);
2584 static int e1000_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
2586 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2587 struct e1000_hw
*hw
= &adapter
->hw
;
2590 if ((adapter
->hw
.mng_cookie
.status
&
2591 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
2592 (vid
== adapter
->mng_vlan_id
)) {
2593 /* release control to f/w */
2594 e1000e_release_hw_control(adapter
);
2598 /* remove VID from filter table */
2599 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2600 index
= (vid
>> 5) & 0x7F;
2601 vfta
= E1000_READ_REG_ARRAY(hw
, E1000_VFTA
, index
);
2602 vfta
&= ~(1 << (vid
& 0x1F));
2603 hw
->mac
.ops
.write_vfta(hw
, index
, vfta
);
2606 clear_bit(vid
, adapter
->active_vlans
);
2612 * e1000e_vlan_filter_disable - helper to disable hw VLAN filtering
2613 * @adapter: board private structure to initialize
2615 static void e1000e_vlan_filter_disable(struct e1000_adapter
*adapter
)
2617 struct net_device
*netdev
= adapter
->netdev
;
2618 struct e1000_hw
*hw
= &adapter
->hw
;
2621 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2622 /* disable VLAN receive filtering */
2624 rctl
&= ~(E1000_RCTL_VFE
| E1000_RCTL_CFIEN
);
2627 if (adapter
->mng_vlan_id
!= (u16
)E1000_MNG_VLAN_NONE
) {
2628 e1000_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
2629 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
2635 * e1000e_vlan_filter_enable - helper to enable HW VLAN filtering
2636 * @adapter: board private structure to initialize
2638 static void e1000e_vlan_filter_enable(struct e1000_adapter
*adapter
)
2640 struct e1000_hw
*hw
= &adapter
->hw
;
2643 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2644 /* enable VLAN receive filtering */
2646 rctl
|= E1000_RCTL_VFE
;
2647 rctl
&= ~E1000_RCTL_CFIEN
;
2653 * e1000e_vlan_strip_enable - helper to disable HW VLAN stripping
2654 * @adapter: board private structure to initialize
2656 static void e1000e_vlan_strip_disable(struct e1000_adapter
*adapter
)
2658 struct e1000_hw
*hw
= &adapter
->hw
;
2661 /* disable VLAN tag insert/strip */
2663 ctrl
&= ~E1000_CTRL_VME
;
2668 * e1000e_vlan_strip_enable - helper to enable HW VLAN stripping
2669 * @adapter: board private structure to initialize
2671 static void e1000e_vlan_strip_enable(struct e1000_adapter
*adapter
)
2673 struct e1000_hw
*hw
= &adapter
->hw
;
2676 /* enable VLAN tag insert/strip */
2678 ctrl
|= E1000_CTRL_VME
;
2682 static void e1000_update_mng_vlan(struct e1000_adapter
*adapter
)
2684 struct net_device
*netdev
= adapter
->netdev
;
2685 u16 vid
= adapter
->hw
.mng_cookie
.vlan_id
;
2686 u16 old_vid
= adapter
->mng_vlan_id
;
2688 if (adapter
->hw
.mng_cookie
.status
&
2689 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) {
2690 e1000_vlan_rx_add_vid(netdev
, vid
);
2691 adapter
->mng_vlan_id
= vid
;
2694 if ((old_vid
!= (u16
)E1000_MNG_VLAN_NONE
) && (vid
!= old_vid
))
2695 e1000_vlan_rx_kill_vid(netdev
, old_vid
);
2698 static void e1000_restore_vlan(struct e1000_adapter
*adapter
)
2702 e1000_vlan_rx_add_vid(adapter
->netdev
, 0);
2704 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
2705 e1000_vlan_rx_add_vid(adapter
->netdev
, vid
);
2708 static void e1000_init_manageability_pt(struct e1000_adapter
*adapter
)
2710 struct e1000_hw
*hw
= &adapter
->hw
;
2711 u32 manc
, manc2h
, mdef
, i
, j
;
2713 if (!(adapter
->flags
& FLAG_MNG_PT_ENABLED
))
2719 * enable receiving management packets to the host. this will probably
2720 * generate destination unreachable messages from the host OS, but
2721 * the packets will be handled on SMBUS
2723 manc
|= E1000_MANC_EN_MNG2HOST
;
2724 manc2h
= er32(MANC2H
);
2726 switch (hw
->mac
.type
) {
2728 manc2h
|= (E1000_MANC2H_PORT_623
| E1000_MANC2H_PORT_664
);
2733 * Check if IPMI pass-through decision filter already exists;
2736 for (i
= 0, j
= 0; i
< 8; i
++) {
2737 mdef
= er32(MDEF(i
));
2739 /* Ignore filters with anything other than IPMI ports */
2740 if (mdef
& ~(E1000_MDEF_PORT_623
| E1000_MDEF_PORT_664
))
2743 /* Enable this decision filter in MANC2H */
2750 if (j
== (E1000_MDEF_PORT_623
| E1000_MDEF_PORT_664
))
2753 /* Create new decision filter in an empty filter */
2754 for (i
= 0, j
= 0; i
< 8; i
++)
2755 if (er32(MDEF(i
)) == 0) {
2756 ew32(MDEF(i
), (E1000_MDEF_PORT_623
|
2757 E1000_MDEF_PORT_664
));
2764 e_warn("Unable to create IPMI pass-through filter\n");
2768 ew32(MANC2H
, manc2h
);
2773 * e1000_configure_tx - Configure Transmit Unit after Reset
2774 * @adapter: board private structure
2776 * Configure the Tx unit of the MAC after a reset.
2778 static void e1000_configure_tx(struct e1000_adapter
*adapter
)
2780 struct e1000_hw
*hw
= &adapter
->hw
;
2781 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
2785 /* Setup the HW Tx Head and Tail descriptor pointers */
2786 tdba
= tx_ring
->dma
;
2787 tdlen
= tx_ring
->count
* sizeof(struct e1000_tx_desc
);
2788 ew32(TDBAL(0), (tdba
& DMA_BIT_MASK(32)));
2789 ew32(TDBAH(0), (tdba
>> 32));
2790 ew32(TDLEN(0), tdlen
);
2793 tx_ring
->head
= adapter
->hw
.hw_addr
+ E1000_TDH(0);
2794 tx_ring
->tail
= adapter
->hw
.hw_addr
+ E1000_TDT(0);
2796 /* Set the Tx Interrupt Delay register */
2797 ew32(TIDV
, adapter
->tx_int_delay
);
2798 /* Tx irq moderation */
2799 ew32(TADV
, adapter
->tx_abs_int_delay
);
2801 if (adapter
->flags2
& FLAG2_DMA_BURST
) {
2802 u32 txdctl
= er32(TXDCTL(0));
2803 txdctl
&= ~(E1000_TXDCTL_PTHRESH
| E1000_TXDCTL_HTHRESH
|
2804 E1000_TXDCTL_WTHRESH
);
2806 * set up some performance related parameters to encourage the
2807 * hardware to use the bus more efficiently in bursts, depends
2808 * on the tx_int_delay to be enabled,
2809 * wthresh = 5 ==> burst write a cacheline (64 bytes) at a time
2810 * hthresh = 1 ==> prefetch when one or more available
2811 * pthresh = 0x1f ==> prefetch if internal cache 31 or less
2812 * BEWARE: this seems to work but should be considered first if
2813 * there are Tx hangs or other Tx related bugs
2815 txdctl
|= E1000_TXDCTL_DMA_BURST_ENABLE
;
2816 ew32(TXDCTL(0), txdctl
);
2818 /* erratum work around: set txdctl the same for both queues */
2819 ew32(TXDCTL(1), er32(TXDCTL(0)));
2821 if (adapter
->flags
& FLAG_TARC_SPEED_MODE_BIT
) {
2822 tarc
= er32(TARC(0));
2824 * set the speed mode bit, we'll clear it if we're not at
2825 * gigabit link later
2827 #define SPEED_MODE_BIT (1 << 21)
2828 tarc
|= SPEED_MODE_BIT
;
2829 ew32(TARC(0), tarc
);
2832 /* errata: program both queues to unweighted RR */
2833 if (adapter
->flags
& FLAG_TARC_SET_BIT_ZERO
) {
2834 tarc
= er32(TARC(0));
2836 ew32(TARC(0), tarc
);
2837 tarc
= er32(TARC(1));
2839 ew32(TARC(1), tarc
);
2842 /* Setup Transmit Descriptor Settings for eop descriptor */
2843 adapter
->txd_cmd
= E1000_TXD_CMD_EOP
| E1000_TXD_CMD_IFCS
;
2845 /* only set IDE if we are delaying interrupts using the timers */
2846 if (adapter
->tx_int_delay
)
2847 adapter
->txd_cmd
|= E1000_TXD_CMD_IDE
;
2849 /* enable Report Status bit */
2850 adapter
->txd_cmd
|= E1000_TXD_CMD_RS
;
2852 hw
->mac
.ops
.config_collision_dist(hw
);
2856 * e1000_setup_rctl - configure the receive control registers
2857 * @adapter: Board private structure
2859 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
2860 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
2861 static void e1000_setup_rctl(struct e1000_adapter
*adapter
)
2863 struct e1000_hw
*hw
= &adapter
->hw
;
2867 /* Workaround Si errata on PCHx - configure jumbo frame flow */
2868 if (hw
->mac
.type
>= e1000_pch2lan
) {
2871 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
)
2872 ret_val
= e1000_lv_jumbo_workaround_ich8lan(hw
, true);
2874 ret_val
= e1000_lv_jumbo_workaround_ich8lan(hw
, false);
2877 e_dbg("failed to enable jumbo frame workaround mode\n");
2880 /* Program MC offset vector base */
2882 rctl
&= ~(3 << E1000_RCTL_MO_SHIFT
);
2883 rctl
|= E1000_RCTL_EN
| E1000_RCTL_BAM
|
2884 E1000_RCTL_LBM_NO
| E1000_RCTL_RDMTS_HALF
|
2885 (adapter
->hw
.mac
.mc_filter_type
<< E1000_RCTL_MO_SHIFT
);
2887 /* Do not Store bad packets */
2888 rctl
&= ~E1000_RCTL_SBP
;
2890 /* Enable Long Packet receive */
2891 if (adapter
->netdev
->mtu
<= ETH_DATA_LEN
)
2892 rctl
&= ~E1000_RCTL_LPE
;
2894 rctl
|= E1000_RCTL_LPE
;
2896 /* Some systems expect that the CRC is included in SMBUS traffic. The
2897 * hardware strips the CRC before sending to both SMBUS (BMC) and to
2898 * host memory when this is enabled
2900 if (adapter
->flags2
& FLAG2_CRC_STRIPPING
)
2901 rctl
|= E1000_RCTL_SECRC
;
2903 /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
2904 if ((hw
->phy
.type
== e1000_phy_82577
) && (rctl
& E1000_RCTL_LPE
)) {
2907 e1e_rphy(hw
, PHY_REG(770, 26), &phy_data
);
2909 phy_data
|= (1 << 2);
2910 e1e_wphy(hw
, PHY_REG(770, 26), phy_data
);
2912 e1e_rphy(hw
, 22, &phy_data
);
2914 phy_data
|= (1 << 14);
2915 e1e_wphy(hw
, 0x10, 0x2823);
2916 e1e_wphy(hw
, 0x11, 0x0003);
2917 e1e_wphy(hw
, 22, phy_data
);
2920 /* Setup buffer sizes */
2921 rctl
&= ~E1000_RCTL_SZ_4096
;
2922 rctl
|= E1000_RCTL_BSEX
;
2923 switch (adapter
->rx_buffer_len
) {
2926 rctl
|= E1000_RCTL_SZ_2048
;
2927 rctl
&= ~E1000_RCTL_BSEX
;
2930 rctl
|= E1000_RCTL_SZ_4096
;
2933 rctl
|= E1000_RCTL_SZ_8192
;
2936 rctl
|= E1000_RCTL_SZ_16384
;
2940 /* Enable Extended Status in all Receive Descriptors */
2941 rfctl
= er32(RFCTL
);
2942 rfctl
|= E1000_RFCTL_EXTEN
;
2946 * 82571 and greater support packet-split where the protocol
2947 * header is placed in skb->data and the packet data is
2948 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2949 * In the case of a non-split, skb->data is linearly filled,
2950 * followed by the page buffers. Therefore, skb->data is
2951 * sized to hold the largest protocol header.
2953 * allocations using alloc_page take too long for regular MTU
2954 * so only enable packet split for jumbo frames
2956 * Using pages when the page size is greater than 16k wastes
2957 * a lot of memory, since we allocate 3 pages at all times
2960 pages
= PAGE_USE_COUNT(adapter
->netdev
->mtu
);
2961 if ((pages
<= 3) && (PAGE_SIZE
<= 16384) && (rctl
& E1000_RCTL_LPE
))
2962 adapter
->rx_ps_pages
= pages
;
2964 adapter
->rx_ps_pages
= 0;
2966 if (adapter
->rx_ps_pages
) {
2969 /* Enable Packet split descriptors */
2970 rctl
|= E1000_RCTL_DTYP_PS
;
2972 psrctl
|= adapter
->rx_ps_bsize0
>>
2973 E1000_PSRCTL_BSIZE0_SHIFT
;
2975 switch (adapter
->rx_ps_pages
) {
2977 psrctl
|= PAGE_SIZE
<<
2978 E1000_PSRCTL_BSIZE3_SHIFT
;
2980 psrctl
|= PAGE_SIZE
<<
2981 E1000_PSRCTL_BSIZE2_SHIFT
;
2983 psrctl
|= PAGE_SIZE
>>
2984 E1000_PSRCTL_BSIZE1_SHIFT
;
2988 ew32(PSRCTL
, psrctl
);
2991 /* This is useful for sniffing bad packets. */
2992 if (adapter
->netdev
->features
& NETIF_F_RXALL
) {
2993 /* UPE and MPE will be handled by normal PROMISC logic
2994 * in e1000e_set_rx_mode */
2995 rctl
|= (E1000_RCTL_SBP
| /* Receive bad packets */
2996 E1000_RCTL_BAM
| /* RX All Bcast Pkts */
2997 E1000_RCTL_PMCF
); /* RX All MAC Ctrl Pkts */
2999 rctl
&= ~(E1000_RCTL_VFE
| /* Disable VLAN filter */
3000 E1000_RCTL_DPF
| /* Allow filtered pause */
3001 E1000_RCTL_CFIEN
); /* Dis VLAN CFIEN Filter */
3002 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
3003 * and that breaks VLANs.
3008 /* just started the receive unit, no need to restart */
3009 adapter
->flags
&= ~FLAG_RX_RESTART_NOW
;
3013 * e1000_configure_rx - Configure Receive Unit after Reset
3014 * @adapter: board private structure
3016 * Configure the Rx unit of the MAC after a reset.
3018 static void e1000_configure_rx(struct e1000_adapter
*adapter
)
3020 struct e1000_hw
*hw
= &adapter
->hw
;
3021 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
3023 u32 rdlen
, rctl
, rxcsum
, ctrl_ext
;
3025 if (adapter
->rx_ps_pages
) {
3026 /* this is a 32 byte descriptor */
3027 rdlen
= rx_ring
->count
*
3028 sizeof(union e1000_rx_desc_packet_split
);
3029 adapter
->clean_rx
= e1000_clean_rx_irq_ps
;
3030 adapter
->alloc_rx_buf
= e1000_alloc_rx_buffers_ps
;
3031 } else if (adapter
->netdev
->mtu
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) {
3032 rdlen
= rx_ring
->count
* sizeof(union e1000_rx_desc_extended
);
3033 adapter
->clean_rx
= e1000_clean_jumbo_rx_irq
;
3034 adapter
->alloc_rx_buf
= e1000_alloc_jumbo_rx_buffers
;
3036 rdlen
= rx_ring
->count
* sizeof(union e1000_rx_desc_extended
);
3037 adapter
->clean_rx
= e1000_clean_rx_irq
;
3038 adapter
->alloc_rx_buf
= e1000_alloc_rx_buffers
;
3041 /* disable receives while setting up the descriptors */
3043 if (!(adapter
->flags2
& FLAG2_NO_DISABLE_RX
))
3044 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
3046 usleep_range(10000, 20000);
3048 if (adapter
->flags2
& FLAG2_DMA_BURST
) {
3050 * set the writeback threshold (only takes effect if the RDTR
3051 * is set). set GRAN=1 and write back up to 0x4 worth, and
3052 * enable prefetching of 0x20 Rx descriptors
3058 ew32(RXDCTL(0), E1000_RXDCTL_DMA_BURST_ENABLE
);
3059 ew32(RXDCTL(1), E1000_RXDCTL_DMA_BURST_ENABLE
);
3062 * override the delay timers for enabling bursting, only if
3063 * the value was not set by the user via module options
3065 if (adapter
->rx_int_delay
== DEFAULT_RDTR
)
3066 adapter
->rx_int_delay
= BURST_RDTR
;
3067 if (adapter
->rx_abs_int_delay
== DEFAULT_RADV
)
3068 adapter
->rx_abs_int_delay
= BURST_RADV
;
3071 /* set the Receive Delay Timer Register */
3072 ew32(RDTR
, adapter
->rx_int_delay
);
3074 /* irq moderation */
3075 ew32(RADV
, adapter
->rx_abs_int_delay
);
3076 if ((adapter
->itr_setting
!= 0) && (adapter
->itr
!= 0))
3077 ew32(ITR
, 1000000000 / (adapter
->itr
* 256));
3079 ctrl_ext
= er32(CTRL_EXT
);
3080 /* Auto-Mask interrupts upon ICR access */
3081 ctrl_ext
|= E1000_CTRL_EXT_IAME
;
3082 ew32(IAM
, 0xffffffff);
3083 ew32(CTRL_EXT
, ctrl_ext
);
3087 * Setup the HW Rx Head and Tail Descriptor Pointers and
3088 * the Base and Length of the Rx Descriptor Ring
3090 rdba
= rx_ring
->dma
;
3091 ew32(RDBAL(0), (rdba
& DMA_BIT_MASK(32)));
3092 ew32(RDBAH(0), (rdba
>> 32));
3093 ew32(RDLEN(0), rdlen
);
3096 rx_ring
->head
= adapter
->hw
.hw_addr
+ E1000_RDH(0);
3097 rx_ring
->tail
= adapter
->hw
.hw_addr
+ E1000_RDT(0);
3099 /* Enable Receive Checksum Offload for TCP and UDP */
3100 rxcsum
= er32(RXCSUM
);
3101 if (adapter
->netdev
->features
& NETIF_F_RXCSUM
) {
3102 rxcsum
|= E1000_RXCSUM_TUOFL
;
3105 * IPv4 payload checksum for UDP fragments must be
3106 * used in conjunction with packet-split.
3108 if (adapter
->rx_ps_pages
)
3109 rxcsum
|= E1000_RXCSUM_IPPCSE
;
3111 rxcsum
&= ~E1000_RXCSUM_TUOFL
;
3112 /* no need to clear IPPCSE as it defaults to 0 */
3114 ew32(RXCSUM
, rxcsum
);
3116 if (adapter
->hw
.mac
.type
== e1000_pch2lan
) {
3118 * With jumbo frames, excessive C-state transition
3119 * latencies result in dropped transactions.
3121 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
3122 u32 rxdctl
= er32(RXDCTL(0));
3123 ew32(RXDCTL(0), rxdctl
| 0x3);
3124 pm_qos_update_request(&adapter
->netdev
->pm_qos_req
, 55);
3126 pm_qos_update_request(&adapter
->netdev
->pm_qos_req
,
3127 PM_QOS_DEFAULT_VALUE
);
3131 /* Enable Receives */
3136 * e1000e_write_mc_addr_list - write multicast addresses to MTA
3137 * @netdev: network interface device structure
3139 * Writes multicast address list to the MTA hash table.
3140 * Returns: -ENOMEM on failure
3141 * 0 on no addresses written
3142 * X on writing X addresses to MTA
3144 static int e1000e_write_mc_addr_list(struct net_device
*netdev
)
3146 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3147 struct e1000_hw
*hw
= &adapter
->hw
;
3148 struct netdev_hw_addr
*ha
;
3152 if (netdev_mc_empty(netdev
)) {
3153 /* nothing to program, so clear mc list */
3154 hw
->mac
.ops
.update_mc_addr_list(hw
, NULL
, 0);
3158 mta_list
= kzalloc(netdev_mc_count(netdev
) * ETH_ALEN
, GFP_ATOMIC
);
3162 /* update_mc_addr_list expects a packed array of only addresses. */
3164 netdev_for_each_mc_addr(ha
, netdev
)
3165 memcpy(mta_list
+ (i
++ * ETH_ALEN
), ha
->addr
, ETH_ALEN
);
3167 hw
->mac
.ops
.update_mc_addr_list(hw
, mta_list
, i
);
3170 return netdev_mc_count(netdev
);
3174 * e1000e_write_uc_addr_list - write unicast addresses to RAR table
3175 * @netdev: network interface device structure
3177 * Writes unicast address list to the RAR table.
3178 * Returns: -ENOMEM on failure/insufficient address space
3179 * 0 on no addresses written
3180 * X on writing X addresses to the RAR table
3182 static int e1000e_write_uc_addr_list(struct net_device
*netdev
)
3184 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3185 struct e1000_hw
*hw
= &adapter
->hw
;
3186 unsigned int rar_entries
= hw
->mac
.rar_entry_count
;
3189 /* save a rar entry for our hardware address */
3192 /* save a rar entry for the LAA workaround */
3193 if (adapter
->flags
& FLAG_RESET_OVERWRITES_LAA
)
3196 /* return ENOMEM indicating insufficient memory for addresses */
3197 if (netdev_uc_count(netdev
) > rar_entries
)
3200 if (!netdev_uc_empty(netdev
) && rar_entries
) {
3201 struct netdev_hw_addr
*ha
;
3204 * write the addresses in reverse order to avoid write
3207 netdev_for_each_uc_addr(ha
, netdev
) {
3210 hw
->mac
.ops
.rar_set(hw
, ha
->addr
, rar_entries
--);
3215 /* zero out the remaining RAR entries not used above */
3216 for (; rar_entries
> 0; rar_entries
--) {
3217 ew32(RAH(rar_entries
), 0);
3218 ew32(RAL(rar_entries
), 0);
3226 * e1000e_set_rx_mode - secondary unicast, Multicast and Promiscuous mode set
3227 * @netdev: network interface device structure
3229 * The ndo_set_rx_mode entry point is called whenever the unicast or multicast
3230 * address list or the network interface flags are updated. This routine is
3231 * responsible for configuring the hardware for proper unicast, multicast,
3232 * promiscuous mode, and all-multi behavior.
3234 static void e1000e_set_rx_mode(struct net_device
*netdev
)
3236 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3237 struct e1000_hw
*hw
= &adapter
->hw
;
3240 /* Check for Promiscuous and All Multicast modes */
3243 /* clear the affected bits */
3244 rctl
&= ~(E1000_RCTL_UPE
| E1000_RCTL_MPE
);
3246 if (netdev
->flags
& IFF_PROMISC
) {
3247 rctl
|= (E1000_RCTL_UPE
| E1000_RCTL_MPE
);
3248 /* Do not hardware filter VLANs in promisc mode */
3249 e1000e_vlan_filter_disable(adapter
);
3253 if (netdev
->flags
& IFF_ALLMULTI
) {
3254 rctl
|= E1000_RCTL_MPE
;
3257 * Write addresses to the MTA, if the attempt fails
3258 * then we should just turn on promiscuous mode so
3259 * that we can at least receive multicast traffic
3261 count
= e1000e_write_mc_addr_list(netdev
);
3263 rctl
|= E1000_RCTL_MPE
;
3265 e1000e_vlan_filter_enable(adapter
);
3267 * Write addresses to available RAR registers, if there is not
3268 * sufficient space to store all the addresses then enable
3269 * unicast promiscuous mode
3271 count
= e1000e_write_uc_addr_list(netdev
);
3273 rctl
|= E1000_RCTL_UPE
;
3278 if (netdev
->features
& NETIF_F_HW_VLAN_RX
)
3279 e1000e_vlan_strip_enable(adapter
);
3281 e1000e_vlan_strip_disable(adapter
);
3284 static void e1000e_setup_rss_hash(struct e1000_adapter
*adapter
)
3286 struct e1000_hw
*hw
= &adapter
->hw
;
3289 static const u32 rsskey
[10] = {
3290 0xda565a6d, 0xc20e5b25, 0x3d256741, 0xb08fa343, 0xcb2bcad0,
3291 0xb4307bae, 0xa32dcb77, 0x0cf23080, 0x3bb7426a, 0xfa01acbe
3294 /* Fill out hash function seed */
3295 for (i
= 0; i
< 10; i
++)
3296 ew32(RSSRK(i
), rsskey
[i
]);
3298 /* Direct all traffic to queue 0 */
3299 for (i
= 0; i
< 32; i
++)
3303 * Disable raw packet checksumming so that RSS hash is placed in
3304 * descriptor on writeback.
3306 rxcsum
= er32(RXCSUM
);
3307 rxcsum
|= E1000_RXCSUM_PCSD
;
3309 ew32(RXCSUM
, rxcsum
);
3311 mrqc
= (E1000_MRQC_RSS_FIELD_IPV4
|
3312 E1000_MRQC_RSS_FIELD_IPV4_TCP
|
3313 E1000_MRQC_RSS_FIELD_IPV6
|
3314 E1000_MRQC_RSS_FIELD_IPV6_TCP
|
3315 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX
);
3321 * e1000_configure - configure the hardware for Rx and Tx
3322 * @adapter: private board structure
3324 static void e1000_configure(struct e1000_adapter
*adapter
)
3326 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
3328 e1000e_set_rx_mode(adapter
->netdev
);
3330 e1000_restore_vlan(adapter
);
3331 e1000_init_manageability_pt(adapter
);
3333 e1000_configure_tx(adapter
);
3335 if (adapter
->netdev
->features
& NETIF_F_RXHASH
)
3336 e1000e_setup_rss_hash(adapter
);
3337 e1000_setup_rctl(adapter
);
3338 e1000_configure_rx(adapter
);
3339 adapter
->alloc_rx_buf(rx_ring
, e1000_desc_unused(rx_ring
), GFP_KERNEL
);
3343 * e1000e_power_up_phy - restore link in case the phy was powered down
3344 * @adapter: address of board private structure
3346 * The phy may be powered down to save power and turn off link when the
3347 * driver is unloaded and wake on lan is not enabled (among others)
3348 * *** this routine MUST be followed by a call to e1000e_reset ***
3350 void e1000e_power_up_phy(struct e1000_adapter
*adapter
)
3352 if (adapter
->hw
.phy
.ops
.power_up
)
3353 adapter
->hw
.phy
.ops
.power_up(&adapter
->hw
);
3355 adapter
->hw
.mac
.ops
.setup_link(&adapter
->hw
);
3359 * e1000_power_down_phy - Power down the PHY
3361 * Power down the PHY so no link is implied when interface is down.
3362 * The PHY cannot be powered down if management or WoL is active.
3364 static void e1000_power_down_phy(struct e1000_adapter
*adapter
)
3366 /* WoL is enabled */
3370 if (adapter
->hw
.phy
.ops
.power_down
)
3371 adapter
->hw
.phy
.ops
.power_down(&adapter
->hw
);
3375 * e1000e_reset - bring the hardware into a known good state
3377 * This function boots the hardware and enables some settings that
3378 * require a configuration cycle of the hardware - those cannot be
3379 * set/changed during runtime. After reset the device needs to be
3380 * properly configured for Rx, Tx etc.
3382 void e1000e_reset(struct e1000_adapter
*adapter
)
3384 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
3385 struct e1000_fc_info
*fc
= &adapter
->hw
.fc
;
3386 struct e1000_hw
*hw
= &adapter
->hw
;
3387 u32 tx_space
, min_tx_space
, min_rx_space
;
3388 u32 pba
= adapter
->pba
;
3391 /* reset Packet Buffer Allocation to default */
3394 if (adapter
->max_frame_size
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) {
3396 * To maintain wire speed transmits, the Tx FIFO should be
3397 * large enough to accommodate two full transmit packets,
3398 * rounded up to the next 1KB and expressed in KB. Likewise,
3399 * the Rx FIFO should be large enough to accommodate at least
3400 * one full receive packet and is similarly rounded up and
3404 /* upper 16 bits has Tx packet buffer allocation size in KB */
3405 tx_space
= pba
>> 16;
3406 /* lower 16 bits has Rx packet buffer allocation size in KB */
3409 * the Tx fifo also stores 16 bytes of information about the Tx
3410 * but don't include ethernet FCS because hardware appends it
3412 min_tx_space
= (adapter
->max_frame_size
+
3413 sizeof(struct e1000_tx_desc
) -
3415 min_tx_space
= ALIGN(min_tx_space
, 1024);
3416 min_tx_space
>>= 10;
3417 /* software strips receive CRC, so leave room for it */
3418 min_rx_space
= adapter
->max_frame_size
;
3419 min_rx_space
= ALIGN(min_rx_space
, 1024);
3420 min_rx_space
>>= 10;
3423 * If current Tx allocation is less than the min Tx FIFO size,
3424 * and the min Tx FIFO size is less than the current Rx FIFO
3425 * allocation, take space away from current Rx allocation
3427 if ((tx_space
< min_tx_space
) &&
3428 ((min_tx_space
- tx_space
) < pba
)) {
3429 pba
-= min_tx_space
- tx_space
;
3432 * if short on Rx space, Rx wins and must trump Tx
3433 * adjustment or use Early Receive if available
3435 if (pba
< min_rx_space
)
3443 * flow control settings
3445 * The high water mark must be low enough to fit one full frame
3446 * (or the size used for early receive) above it in the Rx FIFO.
3447 * Set it to the lower of:
3448 * - 90% of the Rx FIFO size, and
3449 * - the full Rx FIFO size minus one full frame
3451 if (adapter
->flags
& FLAG_DISABLE_FC_PAUSE_TIME
)
3452 fc
->pause_time
= 0xFFFF;
3454 fc
->pause_time
= E1000_FC_PAUSE_TIME
;
3455 fc
->send_xon
= true;
3456 fc
->current_mode
= fc
->requested_mode
;
3458 switch (hw
->mac
.type
) {
3460 case e1000_ich10lan
:
3461 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
3464 fc
->high_water
= 0x2800;
3465 fc
->low_water
= fc
->high_water
- 8;
3470 hwm
= min(((pba
<< 10) * 9 / 10),
3471 ((pba
<< 10) - adapter
->max_frame_size
));
3473 fc
->high_water
= hwm
& E1000_FCRTH_RTH
; /* 8-byte granularity */
3474 fc
->low_water
= fc
->high_water
- 8;
3478 * Workaround PCH LOM adapter hangs with certain network
3479 * loads. If hangs persist, try disabling Tx flow control.
3481 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
3482 fc
->high_water
= 0x3500;
3483 fc
->low_water
= 0x1500;
3485 fc
->high_water
= 0x5000;
3486 fc
->low_water
= 0x3000;
3488 fc
->refresh_time
= 0x1000;
3492 fc
->high_water
= 0x05C20;
3493 fc
->low_water
= 0x05048;
3494 fc
->pause_time
= 0x0650;
3495 fc
->refresh_time
= 0x0400;
3496 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
3504 * Disable Adaptive Interrupt Moderation if 2 full packets cannot
3505 * fit in receive buffer.
3507 if (adapter
->itr_setting
& 0x3) {
3508 if ((adapter
->max_frame_size
* 2) > (pba
<< 10)) {
3509 if (!(adapter
->flags2
& FLAG2_DISABLE_AIM
)) {
3510 dev_info(&adapter
->pdev
->dev
,
3511 "Interrupt Throttle Rate turned off\n");
3512 adapter
->flags2
|= FLAG2_DISABLE_AIM
;
3515 } else if (adapter
->flags2
& FLAG2_DISABLE_AIM
) {
3516 dev_info(&adapter
->pdev
->dev
,
3517 "Interrupt Throttle Rate turned on\n");
3518 adapter
->flags2
&= ~FLAG2_DISABLE_AIM
;
3519 adapter
->itr
= 20000;
3520 ew32(ITR
, 1000000000 / (adapter
->itr
* 256));
3524 /* Allow time for pending master requests to run */
3525 mac
->ops
.reset_hw(hw
);
3528 * For parts with AMT enabled, let the firmware know
3529 * that the network interface is in control
3531 if (adapter
->flags
& FLAG_HAS_AMT
)
3532 e1000e_get_hw_control(adapter
);
3536 if (mac
->ops
.init_hw(hw
))
3537 e_err("Hardware Error\n");
3539 e1000_update_mng_vlan(adapter
);
3541 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
3542 ew32(VET
, ETH_P_8021Q
);
3544 e1000e_reset_adaptive(hw
);
3546 if (!netif_running(adapter
->netdev
) &&
3547 !test_bit(__E1000_TESTING
, &adapter
->state
)) {
3548 e1000_power_down_phy(adapter
);
3552 e1000_get_phy_info(hw
);
3554 if ((adapter
->flags
& FLAG_HAS_SMART_POWER_DOWN
) &&
3555 !(adapter
->flags
& FLAG_SMART_POWER_DOWN
)) {
3558 * speed up time to link by disabling smart power down, ignore
3559 * the return value of this function because there is nothing
3560 * different we would do if it failed
3562 e1e_rphy(hw
, IGP02E1000_PHY_POWER_MGMT
, &phy_data
);
3563 phy_data
&= ~IGP02E1000_PM_SPD
;
3564 e1e_wphy(hw
, IGP02E1000_PHY_POWER_MGMT
, phy_data
);
3568 int e1000e_up(struct e1000_adapter
*adapter
)
3570 struct e1000_hw
*hw
= &adapter
->hw
;
3572 /* hardware has been reset, we need to reload some things */
3573 e1000_configure(adapter
);
3575 clear_bit(__E1000_DOWN
, &adapter
->state
);
3577 if (adapter
->msix_entries
)
3578 e1000_configure_msix(adapter
);
3579 e1000_irq_enable(adapter
);
3581 netif_start_queue(adapter
->netdev
);
3583 /* fire a link change interrupt to start the watchdog */
3584 if (adapter
->msix_entries
)
3585 ew32(ICS
, E1000_ICS_LSC
| E1000_ICR_OTHER
);
3587 ew32(ICS
, E1000_ICS_LSC
);
3592 static void e1000e_flush_descriptors(struct e1000_adapter
*adapter
)
3594 struct e1000_hw
*hw
= &adapter
->hw
;
3596 if (!(adapter
->flags2
& FLAG2_DMA_BURST
))
3599 /* flush pending descriptor writebacks to memory */
3600 ew32(TIDV
, adapter
->tx_int_delay
| E1000_TIDV_FPD
);
3601 ew32(RDTR
, adapter
->rx_int_delay
| E1000_RDTR_FPD
);
3603 /* execute the writes immediately */
3607 * due to rare timing issues, write to TIDV/RDTR again to ensure the
3608 * write is successful
3610 ew32(TIDV
, adapter
->tx_int_delay
| E1000_TIDV_FPD
);
3611 ew32(RDTR
, adapter
->rx_int_delay
| E1000_RDTR_FPD
);
3613 /* execute the writes immediately */
3617 static void e1000e_update_stats(struct e1000_adapter
*adapter
);
3619 void e1000e_down(struct e1000_adapter
*adapter
)
3621 struct net_device
*netdev
= adapter
->netdev
;
3622 struct e1000_hw
*hw
= &adapter
->hw
;
3626 * signal that we're down so the interrupt handler does not
3627 * reschedule our watchdog timer
3629 set_bit(__E1000_DOWN
, &adapter
->state
);
3631 /* disable receives in the hardware */
3633 if (!(adapter
->flags2
& FLAG2_NO_DISABLE_RX
))
3634 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
3635 /* flush and sleep below */
3637 netif_stop_queue(netdev
);
3639 /* disable transmits in the hardware */
3641 tctl
&= ~E1000_TCTL_EN
;
3644 /* flush both disables and wait for them to finish */
3646 usleep_range(10000, 20000);
3648 e1000_irq_disable(adapter
);
3650 del_timer_sync(&adapter
->watchdog_timer
);
3651 del_timer_sync(&adapter
->phy_info_timer
);
3653 netif_carrier_off(netdev
);
3655 spin_lock(&adapter
->stats64_lock
);
3656 e1000e_update_stats(adapter
);
3657 spin_unlock(&adapter
->stats64_lock
);
3659 e1000e_flush_descriptors(adapter
);
3660 e1000_clean_tx_ring(adapter
->tx_ring
);
3661 e1000_clean_rx_ring(adapter
->rx_ring
);
3663 adapter
->link_speed
= 0;
3664 adapter
->link_duplex
= 0;
3666 if (!pci_channel_offline(adapter
->pdev
))
3667 e1000e_reset(adapter
);
3670 * TODO: for power management, we could drop the link and
3671 * pci_disable_device here.
3675 void e1000e_reinit_locked(struct e1000_adapter
*adapter
)
3678 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->state
))
3679 usleep_range(1000, 2000);
3680 e1000e_down(adapter
);
3682 clear_bit(__E1000_RESETTING
, &adapter
->state
);
3686 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
3687 * @adapter: board private structure to initialize
3689 * e1000_sw_init initializes the Adapter private data structure.
3690 * Fields are initialized based on PCI device information and
3691 * OS network device settings (MTU size).
3693 static int __devinit
e1000_sw_init(struct e1000_adapter
*adapter
)
3695 struct net_device
*netdev
= adapter
->netdev
;
3697 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
;
3698 adapter
->rx_ps_bsize0
= 128;
3699 adapter
->max_frame_size
= netdev
->mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
3700 adapter
->min_frame_size
= ETH_ZLEN
+ ETH_FCS_LEN
;
3701 adapter
->tx_ring_count
= E1000_DEFAULT_TXD
;
3702 adapter
->rx_ring_count
= E1000_DEFAULT_RXD
;
3704 spin_lock_init(&adapter
->stats64_lock
);
3706 e1000e_set_interrupt_capability(adapter
);
3708 if (e1000_alloc_queues(adapter
))
3711 /* Explicitly disable IRQ since the NIC can be in any state. */
3712 e1000_irq_disable(adapter
);
3714 set_bit(__E1000_DOWN
, &adapter
->state
);
3719 * e1000_intr_msi_test - Interrupt Handler
3720 * @irq: interrupt number
3721 * @data: pointer to a network interface device structure
3723 static irqreturn_t
e1000_intr_msi_test(int irq
, void *data
)
3725 struct net_device
*netdev
= data
;
3726 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3727 struct e1000_hw
*hw
= &adapter
->hw
;
3728 u32 icr
= er32(ICR
);
3730 e_dbg("icr is %08X\n", icr
);
3731 if (icr
& E1000_ICR_RXSEQ
) {
3732 adapter
->flags
&= ~FLAG_MSI_TEST_FAILED
;
3740 * e1000_test_msi_interrupt - Returns 0 for successful test
3741 * @adapter: board private struct
3743 * code flow taken from tg3.c
3745 static int e1000_test_msi_interrupt(struct e1000_adapter
*adapter
)
3747 struct net_device
*netdev
= adapter
->netdev
;
3748 struct e1000_hw
*hw
= &adapter
->hw
;
3751 /* poll_enable hasn't been called yet, so don't need disable */
3752 /* clear any pending events */
3755 /* free the real vector and request a test handler */
3756 e1000_free_irq(adapter
);
3757 e1000e_reset_interrupt_capability(adapter
);
3759 /* Assume that the test fails, if it succeeds then the test
3760 * MSI irq handler will unset this flag */
3761 adapter
->flags
|= FLAG_MSI_TEST_FAILED
;
3763 err
= pci_enable_msi(adapter
->pdev
);
3765 goto msi_test_failed
;
3767 err
= request_irq(adapter
->pdev
->irq
, e1000_intr_msi_test
, 0,
3768 netdev
->name
, netdev
);
3770 pci_disable_msi(adapter
->pdev
);
3771 goto msi_test_failed
;
3776 e1000_irq_enable(adapter
);
3778 /* fire an unusual interrupt on the test handler */
3779 ew32(ICS
, E1000_ICS_RXSEQ
);
3783 e1000_irq_disable(adapter
);
3787 if (adapter
->flags
& FLAG_MSI_TEST_FAILED
) {
3788 adapter
->int_mode
= E1000E_INT_MODE_LEGACY
;
3789 e_info("MSI interrupt test failed, using legacy interrupt.\n");
3791 e_dbg("MSI interrupt test succeeded!\n");
3794 free_irq(adapter
->pdev
->irq
, netdev
);
3795 pci_disable_msi(adapter
->pdev
);
3798 e1000e_set_interrupt_capability(adapter
);
3799 return e1000_request_irq(adapter
);
3803 * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
3804 * @adapter: board private struct
3806 * code flow taken from tg3.c, called with e1000 interrupts disabled.
3808 static int e1000_test_msi(struct e1000_adapter
*adapter
)
3813 if (!(adapter
->flags
& FLAG_MSI_ENABLED
))
3816 /* disable SERR in case the MSI write causes a master abort */
3817 pci_read_config_word(adapter
->pdev
, PCI_COMMAND
, &pci_cmd
);
3818 if (pci_cmd
& PCI_COMMAND_SERR
)
3819 pci_write_config_word(adapter
->pdev
, PCI_COMMAND
,
3820 pci_cmd
& ~PCI_COMMAND_SERR
);
3822 err
= e1000_test_msi_interrupt(adapter
);
3824 /* re-enable SERR */
3825 if (pci_cmd
& PCI_COMMAND_SERR
) {
3826 pci_read_config_word(adapter
->pdev
, PCI_COMMAND
, &pci_cmd
);
3827 pci_cmd
|= PCI_COMMAND_SERR
;
3828 pci_write_config_word(adapter
->pdev
, PCI_COMMAND
, pci_cmd
);
3835 * e1000_open - Called when a network interface is made active
3836 * @netdev: network interface device structure
3838 * Returns 0 on success, negative value on failure
3840 * The open entry point is called when a network interface is made
3841 * active by the system (IFF_UP). At this point all resources needed
3842 * for transmit and receive operations are allocated, the interrupt
3843 * handler is registered with the OS, the watchdog timer is started,
3844 * and the stack is notified that the interface is ready.
3846 static int e1000_open(struct net_device
*netdev
)
3848 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3849 struct e1000_hw
*hw
= &adapter
->hw
;
3850 struct pci_dev
*pdev
= adapter
->pdev
;
3853 /* disallow open during test */
3854 if (test_bit(__E1000_TESTING
, &adapter
->state
))
3857 pm_runtime_get_sync(&pdev
->dev
);
3859 netif_carrier_off(netdev
);
3861 /* allocate transmit descriptors */
3862 err
= e1000e_setup_tx_resources(adapter
->tx_ring
);
3866 /* allocate receive descriptors */
3867 err
= e1000e_setup_rx_resources(adapter
->rx_ring
);
3872 * If AMT is enabled, let the firmware know that the network
3873 * interface is now open and reset the part to a known state.
3875 if (adapter
->flags
& FLAG_HAS_AMT
) {
3876 e1000e_get_hw_control(adapter
);
3877 e1000e_reset(adapter
);
3880 e1000e_power_up_phy(adapter
);
3882 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
3883 if ((adapter
->hw
.mng_cookie
.status
&
3884 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
))
3885 e1000_update_mng_vlan(adapter
);
3887 /* DMA latency requirement to workaround jumbo issue */
3888 if (adapter
->hw
.mac
.type
== e1000_pch2lan
)
3889 pm_qos_add_request(&adapter
->netdev
->pm_qos_req
,
3890 PM_QOS_CPU_DMA_LATENCY
,
3891 PM_QOS_DEFAULT_VALUE
);
3894 * before we allocate an interrupt, we must be ready to handle it.
3895 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
3896 * as soon as we call pci_request_irq, so we have to setup our
3897 * clean_rx handler before we do so.
3899 e1000_configure(adapter
);
3901 err
= e1000_request_irq(adapter
);
3906 * Work around PCIe errata with MSI interrupts causing some chipsets to
3907 * ignore e1000e MSI messages, which means we need to test our MSI
3910 if (adapter
->int_mode
!= E1000E_INT_MODE_LEGACY
) {
3911 err
= e1000_test_msi(adapter
);
3913 e_err("Interrupt allocation failed\n");
3918 /* From here on the code is the same as e1000e_up() */
3919 clear_bit(__E1000_DOWN
, &adapter
->state
);
3921 napi_enable(&adapter
->napi
);
3923 e1000_irq_enable(adapter
);
3925 adapter
->tx_hang_recheck
= false;
3926 netif_start_queue(netdev
);
3928 adapter
->idle_check
= true;
3929 pm_runtime_put(&pdev
->dev
);
3931 /* fire a link status change interrupt to start the watchdog */
3932 if (adapter
->msix_entries
)
3933 ew32(ICS
, E1000_ICS_LSC
| E1000_ICR_OTHER
);
3935 ew32(ICS
, E1000_ICS_LSC
);
3940 e1000e_release_hw_control(adapter
);
3941 e1000_power_down_phy(adapter
);
3942 e1000e_free_rx_resources(adapter
->rx_ring
);
3944 e1000e_free_tx_resources(adapter
->tx_ring
);
3946 e1000e_reset(adapter
);
3947 pm_runtime_put_sync(&pdev
->dev
);
3953 * e1000_close - Disables a network interface
3954 * @netdev: network interface device structure
3956 * Returns 0, this is not allowed to fail
3958 * The close entry point is called when an interface is de-activated
3959 * by the OS. The hardware is still under the drivers control, but
3960 * needs to be disabled. A global MAC reset is issued to stop the
3961 * hardware, and all transmit and receive resources are freed.
3963 static int e1000_close(struct net_device
*netdev
)
3965 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3966 struct pci_dev
*pdev
= adapter
->pdev
;
3967 int count
= E1000_CHECK_RESET_COUNT
;
3969 while (test_bit(__E1000_RESETTING
, &adapter
->state
) && count
--)
3970 usleep_range(10000, 20000);
3972 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->state
));
3974 pm_runtime_get_sync(&pdev
->dev
);
3976 napi_disable(&adapter
->napi
);
3978 if (!test_bit(__E1000_DOWN
, &adapter
->state
)) {
3979 e1000e_down(adapter
);
3980 e1000_free_irq(adapter
);
3982 e1000_power_down_phy(adapter
);
3984 e1000e_free_tx_resources(adapter
->tx_ring
);
3985 e1000e_free_rx_resources(adapter
->rx_ring
);
3988 * kill manageability vlan ID if supported, but not if a vlan with
3989 * the same ID is registered on the host OS (let 8021q kill it)
3991 if (adapter
->hw
.mng_cookie
.status
&
3992 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
)
3993 e1000_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
3996 * If AMT is enabled, let the firmware know that the network
3997 * interface is now closed
3999 if ((adapter
->flags
& FLAG_HAS_AMT
) &&
4000 !test_bit(__E1000_TESTING
, &adapter
->state
))
4001 e1000e_release_hw_control(adapter
);
4003 if (adapter
->hw
.mac
.type
== e1000_pch2lan
)
4004 pm_qos_remove_request(&adapter
->netdev
->pm_qos_req
);
4006 pm_runtime_put_sync(&pdev
->dev
);
4011 * e1000_set_mac - Change the Ethernet Address of the NIC
4012 * @netdev: network interface device structure
4013 * @p: pointer to an address structure
4015 * Returns 0 on success, negative on failure
4017 static int e1000_set_mac(struct net_device
*netdev
, void *p
)
4019 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4020 struct e1000_hw
*hw
= &adapter
->hw
;
4021 struct sockaddr
*addr
= p
;
4023 if (!is_valid_ether_addr(addr
->sa_data
))
4024 return -EADDRNOTAVAIL
;
4026 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
4027 memcpy(adapter
->hw
.mac
.addr
, addr
->sa_data
, netdev
->addr_len
);
4029 hw
->mac
.ops
.rar_set(&adapter
->hw
, adapter
->hw
.mac
.addr
, 0);
4031 if (adapter
->flags
& FLAG_RESET_OVERWRITES_LAA
) {
4032 /* activate the work around */
4033 e1000e_set_laa_state_82571(&adapter
->hw
, 1);
4036 * Hold a copy of the LAA in RAR[14] This is done so that
4037 * between the time RAR[0] gets clobbered and the time it
4038 * gets fixed (in e1000_watchdog), the actual LAA is in one
4039 * of the RARs and no incoming packets directed to this port
4040 * are dropped. Eventually the LAA will be in RAR[0] and
4043 hw
->mac
.ops
.rar_set(&adapter
->hw
, adapter
->hw
.mac
.addr
,
4044 adapter
->hw
.mac
.rar_entry_count
- 1);
4051 * e1000e_update_phy_task - work thread to update phy
4052 * @work: pointer to our work struct
4054 * this worker thread exists because we must acquire a
4055 * semaphore to read the phy, which we could msleep while
4056 * waiting for it, and we can't msleep in a timer.
4058 static void e1000e_update_phy_task(struct work_struct
*work
)
4060 struct e1000_adapter
*adapter
= container_of(work
,
4061 struct e1000_adapter
, update_phy_task
);
4063 if (test_bit(__E1000_DOWN
, &adapter
->state
))
4066 e1000_get_phy_info(&adapter
->hw
);
4070 * Need to wait a few seconds after link up to get diagnostic information from
4073 static void e1000_update_phy_info(unsigned long data
)
4075 struct e1000_adapter
*adapter
= (struct e1000_adapter
*) data
;
4077 if (test_bit(__E1000_DOWN
, &adapter
->state
))
4080 schedule_work(&adapter
->update_phy_task
);
4084 * e1000e_update_phy_stats - Update the PHY statistics counters
4085 * @adapter: board private structure
4087 * Read/clear the upper 16-bit PHY registers and read/accumulate lower
4089 static void e1000e_update_phy_stats(struct e1000_adapter
*adapter
)
4091 struct e1000_hw
*hw
= &adapter
->hw
;
4095 ret_val
= hw
->phy
.ops
.acquire(hw
);
4100 * A page set is expensive so check if already on desired page.
4101 * If not, set to the page with the PHY status registers.
4104 ret_val
= e1000e_read_phy_reg_mdic(hw
, IGP01E1000_PHY_PAGE_SELECT
,
4108 if (phy_data
!= (HV_STATS_PAGE
<< IGP_PAGE_SHIFT
)) {
4109 ret_val
= hw
->phy
.ops
.set_page(hw
,
4110 HV_STATS_PAGE
<< IGP_PAGE_SHIFT
);
4115 /* Single Collision Count */
4116 hw
->phy
.ops
.read_reg_page(hw
, HV_SCC_UPPER
, &phy_data
);
4117 ret_val
= hw
->phy
.ops
.read_reg_page(hw
, HV_SCC_LOWER
, &phy_data
);
4119 adapter
->stats
.scc
+= phy_data
;
4121 /* Excessive Collision Count */
4122 hw
->phy
.ops
.read_reg_page(hw
, HV_ECOL_UPPER
, &phy_data
);
4123 ret_val
= hw
->phy
.ops
.read_reg_page(hw
, HV_ECOL_LOWER
, &phy_data
);
4125 adapter
->stats
.ecol
+= phy_data
;
4127 /* Multiple Collision Count */
4128 hw
->phy
.ops
.read_reg_page(hw
, HV_MCC_UPPER
, &phy_data
);
4129 ret_val
= hw
->phy
.ops
.read_reg_page(hw
, HV_MCC_LOWER
, &phy_data
);
4131 adapter
->stats
.mcc
+= phy_data
;
4133 /* Late Collision Count */
4134 hw
->phy
.ops
.read_reg_page(hw
, HV_LATECOL_UPPER
, &phy_data
);
4135 ret_val
= hw
->phy
.ops
.read_reg_page(hw
, HV_LATECOL_LOWER
, &phy_data
);
4137 adapter
->stats
.latecol
+= phy_data
;
4139 /* Collision Count - also used for adaptive IFS */
4140 hw
->phy
.ops
.read_reg_page(hw
, HV_COLC_UPPER
, &phy_data
);
4141 ret_val
= hw
->phy
.ops
.read_reg_page(hw
, HV_COLC_LOWER
, &phy_data
);
4143 hw
->mac
.collision_delta
= phy_data
;
4146 hw
->phy
.ops
.read_reg_page(hw
, HV_DC_UPPER
, &phy_data
);
4147 ret_val
= hw
->phy
.ops
.read_reg_page(hw
, HV_DC_LOWER
, &phy_data
);
4149 adapter
->stats
.dc
+= phy_data
;
4151 /* Transmit with no CRS */
4152 hw
->phy
.ops
.read_reg_page(hw
, HV_TNCRS_UPPER
, &phy_data
);
4153 ret_val
= hw
->phy
.ops
.read_reg_page(hw
, HV_TNCRS_LOWER
, &phy_data
);
4155 adapter
->stats
.tncrs
+= phy_data
;
4158 hw
->phy
.ops
.release(hw
);
4162 * e1000e_update_stats - Update the board statistics counters
4163 * @adapter: board private structure
4165 static void e1000e_update_stats(struct e1000_adapter
*adapter
)
4167 struct net_device
*netdev
= adapter
->netdev
;
4168 struct e1000_hw
*hw
= &adapter
->hw
;
4169 struct pci_dev
*pdev
= adapter
->pdev
;
4172 * Prevent stats update while adapter is being reset, or if the pci
4173 * connection is down.
4175 if (adapter
->link_speed
== 0)
4177 if (pci_channel_offline(pdev
))
4180 adapter
->stats
.crcerrs
+= er32(CRCERRS
);
4181 adapter
->stats
.gprc
+= er32(GPRC
);
4182 adapter
->stats
.gorc
+= er32(GORCL
);
4183 er32(GORCH
); /* Clear gorc */
4184 adapter
->stats
.bprc
+= er32(BPRC
);
4185 adapter
->stats
.mprc
+= er32(MPRC
);
4186 adapter
->stats
.roc
+= er32(ROC
);
4188 adapter
->stats
.mpc
+= er32(MPC
);
4190 /* Half-duplex statistics */
4191 if (adapter
->link_duplex
== HALF_DUPLEX
) {
4192 if (adapter
->flags2
& FLAG2_HAS_PHY_STATS
) {
4193 e1000e_update_phy_stats(adapter
);
4195 adapter
->stats
.scc
+= er32(SCC
);
4196 adapter
->stats
.ecol
+= er32(ECOL
);
4197 adapter
->stats
.mcc
+= er32(MCC
);
4198 adapter
->stats
.latecol
+= er32(LATECOL
);
4199 adapter
->stats
.dc
+= er32(DC
);
4201 hw
->mac
.collision_delta
= er32(COLC
);
4203 if ((hw
->mac
.type
!= e1000_82574
) &&
4204 (hw
->mac
.type
!= e1000_82583
))
4205 adapter
->stats
.tncrs
+= er32(TNCRS
);
4207 adapter
->stats
.colc
+= hw
->mac
.collision_delta
;
4210 adapter
->stats
.xonrxc
+= er32(XONRXC
);
4211 adapter
->stats
.xontxc
+= er32(XONTXC
);
4212 adapter
->stats
.xoffrxc
+= er32(XOFFRXC
);
4213 adapter
->stats
.xofftxc
+= er32(XOFFTXC
);
4214 adapter
->stats
.gptc
+= er32(GPTC
);
4215 adapter
->stats
.gotc
+= er32(GOTCL
);
4216 er32(GOTCH
); /* Clear gotc */
4217 adapter
->stats
.rnbc
+= er32(RNBC
);
4218 adapter
->stats
.ruc
+= er32(RUC
);
4220 adapter
->stats
.mptc
+= er32(MPTC
);
4221 adapter
->stats
.bptc
+= er32(BPTC
);
4223 /* used for adaptive IFS */
4225 hw
->mac
.tx_packet_delta
= er32(TPT
);
4226 adapter
->stats
.tpt
+= hw
->mac
.tx_packet_delta
;
4228 adapter
->stats
.algnerrc
+= er32(ALGNERRC
);
4229 adapter
->stats
.rxerrc
+= er32(RXERRC
);
4230 adapter
->stats
.cexterr
+= er32(CEXTERR
);
4231 adapter
->stats
.tsctc
+= er32(TSCTC
);
4232 adapter
->stats
.tsctfc
+= er32(TSCTFC
);
4234 /* Fill out the OS statistics structure */
4235 netdev
->stats
.multicast
= adapter
->stats
.mprc
;
4236 netdev
->stats
.collisions
= adapter
->stats
.colc
;
4241 * RLEC on some newer hardware can be incorrect so build
4242 * our own version based on RUC and ROC
4244 netdev
->stats
.rx_errors
= adapter
->stats
.rxerrc
+
4245 adapter
->stats
.crcerrs
+ adapter
->stats
.algnerrc
+
4246 adapter
->stats
.ruc
+ adapter
->stats
.roc
+
4247 adapter
->stats
.cexterr
;
4248 netdev
->stats
.rx_length_errors
= adapter
->stats
.ruc
+
4250 netdev
->stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
4251 netdev
->stats
.rx_frame_errors
= adapter
->stats
.algnerrc
;
4252 netdev
->stats
.rx_missed_errors
= adapter
->stats
.mpc
;
4255 netdev
->stats
.tx_errors
= adapter
->stats
.ecol
+
4256 adapter
->stats
.latecol
;
4257 netdev
->stats
.tx_aborted_errors
= adapter
->stats
.ecol
;
4258 netdev
->stats
.tx_window_errors
= adapter
->stats
.latecol
;
4259 netdev
->stats
.tx_carrier_errors
= adapter
->stats
.tncrs
;
4261 /* Tx Dropped needs to be maintained elsewhere */
4263 /* Management Stats */
4264 adapter
->stats
.mgptc
+= er32(MGTPTC
);
4265 adapter
->stats
.mgprc
+= er32(MGTPRC
);
4266 adapter
->stats
.mgpdc
+= er32(MGTPDC
);
4270 * e1000_phy_read_status - Update the PHY register status snapshot
4271 * @adapter: board private structure
4273 static void e1000_phy_read_status(struct e1000_adapter
*adapter
)
4275 struct e1000_hw
*hw
= &adapter
->hw
;
4276 struct e1000_phy_regs
*phy
= &adapter
->phy_regs
;
4278 if ((er32(STATUS
) & E1000_STATUS_LU
) &&
4279 (adapter
->hw
.phy
.media_type
== e1000_media_type_copper
)) {
4282 ret_val
= e1e_rphy(hw
, PHY_CONTROL
, &phy
->bmcr
);
4283 ret_val
|= e1e_rphy(hw
, PHY_STATUS
, &phy
->bmsr
);
4284 ret_val
|= e1e_rphy(hw
, PHY_AUTONEG_ADV
, &phy
->advertise
);
4285 ret_val
|= e1e_rphy(hw
, PHY_LP_ABILITY
, &phy
->lpa
);
4286 ret_val
|= e1e_rphy(hw
, PHY_AUTONEG_EXP
, &phy
->expansion
);
4287 ret_val
|= e1e_rphy(hw
, PHY_1000T_CTRL
, &phy
->ctrl1000
);
4288 ret_val
|= e1e_rphy(hw
, PHY_1000T_STATUS
, &phy
->stat1000
);
4289 ret_val
|= e1e_rphy(hw
, PHY_EXT_STATUS
, &phy
->estatus
);
4291 e_warn("Error reading PHY register\n");
4294 * Do not read PHY registers if link is not up
4295 * Set values to typical power-on defaults
4297 phy
->bmcr
= (BMCR_SPEED1000
| BMCR_ANENABLE
| BMCR_FULLDPLX
);
4298 phy
->bmsr
= (BMSR_100FULL
| BMSR_100HALF
| BMSR_10FULL
|
4299 BMSR_10HALF
| BMSR_ESTATEN
| BMSR_ANEGCAPABLE
|
4301 phy
->advertise
= (ADVERTISE_PAUSE_ASYM
| ADVERTISE_PAUSE_CAP
|
4302 ADVERTISE_ALL
| ADVERTISE_CSMA
);
4304 phy
->expansion
= EXPANSION_ENABLENPAGE
;
4305 phy
->ctrl1000
= ADVERTISE_1000FULL
;
4307 phy
->estatus
= (ESTATUS_1000_TFULL
| ESTATUS_1000_THALF
);
4311 static void e1000_print_link_info(struct e1000_adapter
*adapter
)
4313 struct e1000_hw
*hw
= &adapter
->hw
;
4314 u32 ctrl
= er32(CTRL
);
4316 /* Link status message must follow this format for user tools */
4317 printk(KERN_INFO
"e1000e: %s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n",
4318 adapter
->netdev
->name
,
4319 adapter
->link_speed
,
4320 adapter
->link_duplex
== FULL_DUPLEX
? "Full" : "Half",
4321 (ctrl
& E1000_CTRL_TFCE
) && (ctrl
& E1000_CTRL_RFCE
) ? "Rx/Tx" :
4322 (ctrl
& E1000_CTRL_RFCE
) ? "Rx" :
4323 (ctrl
& E1000_CTRL_TFCE
) ? "Tx" : "None");
4326 static bool e1000e_has_link(struct e1000_adapter
*adapter
)
4328 struct e1000_hw
*hw
= &adapter
->hw
;
4329 bool link_active
= false;
4333 * get_link_status is set on LSC (link status) interrupt or
4334 * Rx sequence error interrupt. get_link_status will stay
4335 * false until the check_for_link establishes link
4336 * for copper adapters ONLY
4338 switch (hw
->phy
.media_type
) {
4339 case e1000_media_type_copper
:
4340 if (hw
->mac
.get_link_status
) {
4341 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
4342 link_active
= !hw
->mac
.get_link_status
;
4347 case e1000_media_type_fiber
:
4348 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
4349 link_active
= !!(er32(STATUS
) & E1000_STATUS_LU
);
4351 case e1000_media_type_internal_serdes
:
4352 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
4353 link_active
= adapter
->hw
.mac
.serdes_has_link
;
4356 case e1000_media_type_unknown
:
4360 if ((ret_val
== E1000_ERR_PHY
) && (hw
->phy
.type
== e1000_phy_igp_3
) &&
4361 (er32(CTRL
) & E1000_PHY_CTRL_GBE_DISABLE
)) {
4362 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
4363 e_info("Gigabit has been disabled, downgrading speed\n");
4369 static void e1000e_enable_receives(struct e1000_adapter
*adapter
)
4371 /* make sure the receive unit is started */
4372 if ((adapter
->flags
& FLAG_RX_NEEDS_RESTART
) &&
4373 (adapter
->flags
& FLAG_RX_RESTART_NOW
)) {
4374 struct e1000_hw
*hw
= &adapter
->hw
;
4375 u32 rctl
= er32(RCTL
);
4376 ew32(RCTL
, rctl
| E1000_RCTL_EN
);
4377 adapter
->flags
&= ~FLAG_RX_RESTART_NOW
;
4381 static void e1000e_check_82574_phy_workaround(struct e1000_adapter
*adapter
)
4383 struct e1000_hw
*hw
= &adapter
->hw
;
4386 * With 82574 controllers, PHY needs to be checked periodically
4387 * for hung state and reset, if two calls return true
4389 if (e1000_check_phy_82574(hw
))
4390 adapter
->phy_hang_count
++;
4392 adapter
->phy_hang_count
= 0;
4394 if (adapter
->phy_hang_count
> 1) {
4395 adapter
->phy_hang_count
= 0;
4396 schedule_work(&adapter
->reset_task
);
4401 * e1000_watchdog - Timer Call-back
4402 * @data: pointer to adapter cast into an unsigned long
4404 static void e1000_watchdog(unsigned long data
)
4406 struct e1000_adapter
*adapter
= (struct e1000_adapter
*) data
;
4408 /* Do the rest outside of interrupt context */
4409 schedule_work(&adapter
->watchdog_task
);
4411 /* TODO: make this use queue_delayed_work() */
4414 static void e1000_watchdog_task(struct work_struct
*work
)
4416 struct e1000_adapter
*adapter
= container_of(work
,
4417 struct e1000_adapter
, watchdog_task
);
4418 struct net_device
*netdev
= adapter
->netdev
;
4419 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
4420 struct e1000_phy_info
*phy
= &adapter
->hw
.phy
;
4421 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
4422 struct e1000_hw
*hw
= &adapter
->hw
;
4425 if (test_bit(__E1000_DOWN
, &adapter
->state
))
4428 link
= e1000e_has_link(adapter
);
4429 if ((netif_carrier_ok(netdev
)) && link
) {
4430 /* Cancel scheduled suspend requests. */
4431 pm_runtime_resume(netdev
->dev
.parent
);
4433 e1000e_enable_receives(adapter
);
4437 if ((e1000e_enable_tx_pkt_filtering(hw
)) &&
4438 (adapter
->mng_vlan_id
!= adapter
->hw
.mng_cookie
.vlan_id
))
4439 e1000_update_mng_vlan(adapter
);
4442 if (!netif_carrier_ok(netdev
)) {
4445 /* Cancel scheduled suspend requests. */
4446 pm_runtime_resume(netdev
->dev
.parent
);
4448 /* update snapshot of PHY registers on LSC */
4449 e1000_phy_read_status(adapter
);
4450 mac
->ops
.get_link_up_info(&adapter
->hw
,
4451 &adapter
->link_speed
,
4452 &adapter
->link_duplex
);
4453 e1000_print_link_info(adapter
);
4455 * On supported PHYs, check for duplex mismatch only
4456 * if link has autonegotiated at 10/100 half
4458 if ((hw
->phy
.type
== e1000_phy_igp_3
||
4459 hw
->phy
.type
== e1000_phy_bm
) &&
4460 (hw
->mac
.autoneg
== true) &&
4461 (adapter
->link_speed
== SPEED_10
||
4462 adapter
->link_speed
== SPEED_100
) &&
4463 (adapter
->link_duplex
== HALF_DUPLEX
)) {
4466 e1e_rphy(hw
, PHY_AUTONEG_EXP
, &autoneg_exp
);
4468 if (!(autoneg_exp
& NWAY_ER_LP_NWAY_CAPS
))
4469 e_info("Autonegotiated half duplex but link partner cannot autoneg. Try forcing full duplex if link gets many collisions.\n");
4472 /* adjust timeout factor according to speed/duplex */
4473 adapter
->tx_timeout_factor
= 1;
4474 switch (adapter
->link_speed
) {
4477 adapter
->tx_timeout_factor
= 16;
4481 adapter
->tx_timeout_factor
= 10;
4486 * workaround: re-program speed mode bit after
4489 if ((adapter
->flags
& FLAG_TARC_SPEED_MODE_BIT
) &&
4492 tarc0
= er32(TARC(0));
4493 tarc0
&= ~SPEED_MODE_BIT
;
4494 ew32(TARC(0), tarc0
);
4498 * disable TSO for pcie and 10/100 speeds, to avoid
4499 * some hardware issues
4501 if (!(adapter
->flags
& FLAG_TSO_FORCE
)) {
4502 switch (adapter
->link_speed
) {
4505 e_info("10/100 speed: disabling TSO\n");
4506 netdev
->features
&= ~NETIF_F_TSO
;
4507 netdev
->features
&= ~NETIF_F_TSO6
;
4510 netdev
->features
|= NETIF_F_TSO
;
4511 netdev
->features
|= NETIF_F_TSO6
;
4520 * enable transmits in the hardware, need to do this
4521 * after setting TARC(0)
4524 tctl
|= E1000_TCTL_EN
;
4528 * Perform any post-link-up configuration before
4529 * reporting link up.
4531 if (phy
->ops
.cfg_on_link_up
)
4532 phy
->ops
.cfg_on_link_up(hw
);
4534 netif_carrier_on(netdev
);
4536 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
4537 mod_timer(&adapter
->phy_info_timer
,
4538 round_jiffies(jiffies
+ 2 * HZ
));
4541 if (netif_carrier_ok(netdev
)) {
4542 adapter
->link_speed
= 0;
4543 adapter
->link_duplex
= 0;
4544 /* Link status message must follow this format */
4545 printk(KERN_INFO
"e1000e: %s NIC Link is Down\n",
4546 adapter
->netdev
->name
);
4547 netif_carrier_off(netdev
);
4548 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
4549 mod_timer(&adapter
->phy_info_timer
,
4550 round_jiffies(jiffies
+ 2 * HZ
));
4552 if (adapter
->flags
& FLAG_RX_NEEDS_RESTART
)
4553 schedule_work(&adapter
->reset_task
);
4555 pm_schedule_suspend(netdev
->dev
.parent
,
4561 spin_lock(&adapter
->stats64_lock
);
4562 e1000e_update_stats(adapter
);
4564 mac
->tx_packet_delta
= adapter
->stats
.tpt
- adapter
->tpt_old
;
4565 adapter
->tpt_old
= adapter
->stats
.tpt
;
4566 mac
->collision_delta
= adapter
->stats
.colc
- adapter
->colc_old
;
4567 adapter
->colc_old
= adapter
->stats
.colc
;
4569 adapter
->gorc
= adapter
->stats
.gorc
- adapter
->gorc_old
;
4570 adapter
->gorc_old
= adapter
->stats
.gorc
;
4571 adapter
->gotc
= adapter
->stats
.gotc
- adapter
->gotc_old
;
4572 adapter
->gotc_old
= adapter
->stats
.gotc
;
4573 spin_unlock(&adapter
->stats64_lock
);
4575 e1000e_update_adaptive(&adapter
->hw
);
4577 if (!netif_carrier_ok(netdev
) &&
4578 (e1000_desc_unused(tx_ring
) + 1 < tx_ring
->count
)) {
4580 * We've lost link, so the controller stops DMA,
4581 * but we've got queued Tx work that's never going
4582 * to get done, so reset controller to flush Tx.
4583 * (Do the reset outside of interrupt context).
4585 schedule_work(&adapter
->reset_task
);
4586 /* return immediately since reset is imminent */
4590 /* Simple mode for Interrupt Throttle Rate (ITR) */
4591 if (adapter
->itr_setting
== 4) {
4593 * Symmetric Tx/Rx gets a reduced ITR=2000;
4594 * Total asymmetrical Tx or Rx gets ITR=8000;
4595 * everyone else is between 2000-8000.
4597 u32 goc
= (adapter
->gotc
+ adapter
->gorc
) / 10000;
4598 u32 dif
= (adapter
->gotc
> adapter
->gorc
?
4599 adapter
->gotc
- adapter
->gorc
:
4600 adapter
->gorc
- adapter
->gotc
) / 10000;
4601 u32 itr
= goc
> 0 ? (dif
* 6000 / goc
+ 2000) : 8000;
4603 ew32(ITR
, 1000000000 / (itr
* 256));
4606 /* Cause software interrupt to ensure Rx ring is cleaned */
4607 if (adapter
->msix_entries
)
4608 ew32(ICS
, adapter
->rx_ring
->ims_val
);
4610 ew32(ICS
, E1000_ICS_RXDMT0
);
4612 /* flush pending descriptors to memory before detecting Tx hang */
4613 e1000e_flush_descriptors(adapter
);
4615 /* Force detection of hung controller every watchdog period */
4616 adapter
->detect_tx_hung
= true;
4619 * With 82571 controllers, LAA may be overwritten due to controller
4620 * reset from the other port. Set the appropriate LAA in RAR[0]
4622 if (e1000e_get_laa_state_82571(hw
))
4623 hw
->mac
.ops
.rar_set(hw
, adapter
->hw
.mac
.addr
, 0);
4625 if (adapter
->flags2
& FLAG2_CHECK_PHY_HANG
)
4626 e1000e_check_82574_phy_workaround(adapter
);
4628 /* Reset the timer */
4629 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
4630 mod_timer(&adapter
->watchdog_timer
,
4631 round_jiffies(jiffies
+ 2 * HZ
));
4634 #define E1000_TX_FLAGS_CSUM 0x00000001
4635 #define E1000_TX_FLAGS_VLAN 0x00000002
4636 #define E1000_TX_FLAGS_TSO 0x00000004
4637 #define E1000_TX_FLAGS_IPV4 0x00000008
4638 #define E1000_TX_FLAGS_NO_FCS 0x00000010
4639 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
4640 #define E1000_TX_FLAGS_VLAN_SHIFT 16
4642 static int e1000_tso(struct e1000_ring
*tx_ring
, struct sk_buff
*skb
)
4644 struct e1000_context_desc
*context_desc
;
4645 struct e1000_buffer
*buffer_info
;
4648 u16 ipcse
= 0, tucse
, mss
;
4649 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
4651 if (!skb_is_gso(skb
))
4654 if (skb_header_cloned(skb
)) {
4655 int err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
4661 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
4662 mss
= skb_shinfo(skb
)->gso_size
;
4663 if (skb
->protocol
== htons(ETH_P_IP
)) {
4664 struct iphdr
*iph
= ip_hdr(skb
);
4667 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
, iph
->daddr
,
4669 cmd_length
= E1000_TXD_CMD_IP
;
4670 ipcse
= skb_transport_offset(skb
) - 1;
4671 } else if (skb_is_gso_v6(skb
)) {
4672 ipv6_hdr(skb
)->payload_len
= 0;
4673 tcp_hdr(skb
)->check
= ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
4674 &ipv6_hdr(skb
)->daddr
,
4678 ipcss
= skb_network_offset(skb
);
4679 ipcso
= (void *)&(ip_hdr(skb
)->check
) - (void *)skb
->data
;
4680 tucss
= skb_transport_offset(skb
);
4681 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
4684 cmd_length
|= (E1000_TXD_CMD_DEXT
| E1000_TXD_CMD_TSE
|
4685 E1000_TXD_CMD_TCP
| (skb
->len
- (hdr_len
)));
4687 i
= tx_ring
->next_to_use
;
4688 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
4689 buffer_info
= &tx_ring
->buffer_info
[i
];
4691 context_desc
->lower_setup
.ip_fields
.ipcss
= ipcss
;
4692 context_desc
->lower_setup
.ip_fields
.ipcso
= ipcso
;
4693 context_desc
->lower_setup
.ip_fields
.ipcse
= cpu_to_le16(ipcse
);
4694 context_desc
->upper_setup
.tcp_fields
.tucss
= tucss
;
4695 context_desc
->upper_setup
.tcp_fields
.tucso
= tucso
;
4696 context_desc
->upper_setup
.tcp_fields
.tucse
= cpu_to_le16(tucse
);
4697 context_desc
->tcp_seg_setup
.fields
.mss
= cpu_to_le16(mss
);
4698 context_desc
->tcp_seg_setup
.fields
.hdr_len
= hdr_len
;
4699 context_desc
->cmd_and_length
= cpu_to_le32(cmd_length
);
4701 buffer_info
->time_stamp
= jiffies
;
4702 buffer_info
->next_to_watch
= i
;
4705 if (i
== tx_ring
->count
)
4707 tx_ring
->next_to_use
= i
;
4712 static bool e1000_tx_csum(struct e1000_ring
*tx_ring
, struct sk_buff
*skb
)
4714 struct e1000_adapter
*adapter
= tx_ring
->adapter
;
4715 struct e1000_context_desc
*context_desc
;
4716 struct e1000_buffer
*buffer_info
;
4719 u32 cmd_len
= E1000_TXD_CMD_DEXT
;
4722 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
4725 if (skb
->protocol
== cpu_to_be16(ETH_P_8021Q
))
4726 protocol
= vlan_eth_hdr(skb
)->h_vlan_encapsulated_proto
;
4728 protocol
= skb
->protocol
;
4731 case cpu_to_be16(ETH_P_IP
):
4732 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
4733 cmd_len
|= E1000_TXD_CMD_TCP
;
4735 case cpu_to_be16(ETH_P_IPV6
):
4736 /* XXX not handling all IPV6 headers */
4737 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
4738 cmd_len
|= E1000_TXD_CMD_TCP
;
4741 if (unlikely(net_ratelimit()))
4742 e_warn("checksum_partial proto=%x!\n",
4743 be16_to_cpu(protocol
));
4747 css
= skb_checksum_start_offset(skb
);
4749 i
= tx_ring
->next_to_use
;
4750 buffer_info
= &tx_ring
->buffer_info
[i
];
4751 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
4753 context_desc
->lower_setup
.ip_config
= 0;
4754 context_desc
->upper_setup
.tcp_fields
.tucss
= css
;
4755 context_desc
->upper_setup
.tcp_fields
.tucso
=
4756 css
+ skb
->csum_offset
;
4757 context_desc
->upper_setup
.tcp_fields
.tucse
= 0;
4758 context_desc
->tcp_seg_setup
.data
= 0;
4759 context_desc
->cmd_and_length
= cpu_to_le32(cmd_len
);
4761 buffer_info
->time_stamp
= jiffies
;
4762 buffer_info
->next_to_watch
= i
;
4765 if (i
== tx_ring
->count
)
4767 tx_ring
->next_to_use
= i
;
4772 #define E1000_MAX_PER_TXD 8192
4773 #define E1000_MAX_TXD_PWR 12
4775 static int e1000_tx_map(struct e1000_ring
*tx_ring
, struct sk_buff
*skb
,
4776 unsigned int first
, unsigned int max_per_txd
,
4777 unsigned int nr_frags
, unsigned int mss
)
4779 struct e1000_adapter
*adapter
= tx_ring
->adapter
;
4780 struct pci_dev
*pdev
= adapter
->pdev
;
4781 struct e1000_buffer
*buffer_info
;
4782 unsigned int len
= skb_headlen(skb
);
4783 unsigned int offset
= 0, size
, count
= 0, i
;
4784 unsigned int f
, bytecount
, segs
;
4786 i
= tx_ring
->next_to_use
;
4789 buffer_info
= &tx_ring
->buffer_info
[i
];
4790 size
= min(len
, max_per_txd
);
4792 buffer_info
->length
= size
;
4793 buffer_info
->time_stamp
= jiffies
;
4794 buffer_info
->next_to_watch
= i
;
4795 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
4797 size
, DMA_TO_DEVICE
);
4798 buffer_info
->mapped_as_page
= false;
4799 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
4808 if (i
== tx_ring
->count
)
4813 for (f
= 0; f
< nr_frags
; f
++) {
4814 const struct skb_frag_struct
*frag
;
4816 frag
= &skb_shinfo(skb
)->frags
[f
];
4817 len
= skb_frag_size(frag
);
4822 if (i
== tx_ring
->count
)
4825 buffer_info
= &tx_ring
->buffer_info
[i
];
4826 size
= min(len
, max_per_txd
);
4828 buffer_info
->length
= size
;
4829 buffer_info
->time_stamp
= jiffies
;
4830 buffer_info
->next_to_watch
= i
;
4831 buffer_info
->dma
= skb_frag_dma_map(&pdev
->dev
, frag
,
4832 offset
, size
, DMA_TO_DEVICE
);
4833 buffer_info
->mapped_as_page
= true;
4834 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
4843 segs
= skb_shinfo(skb
)->gso_segs
? : 1;
4844 /* multiply data chunks by size of headers */
4845 bytecount
= ((segs
- 1) * skb_headlen(skb
)) + skb
->len
;
4847 tx_ring
->buffer_info
[i
].skb
= skb
;
4848 tx_ring
->buffer_info
[i
].segs
= segs
;
4849 tx_ring
->buffer_info
[i
].bytecount
= bytecount
;
4850 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
4855 dev_err(&pdev
->dev
, "Tx DMA map failed\n");
4856 buffer_info
->dma
= 0;
4862 i
+= tx_ring
->count
;
4864 buffer_info
= &tx_ring
->buffer_info
[i
];
4865 e1000_put_txbuf(tx_ring
, buffer_info
);
4871 static void e1000_tx_queue(struct e1000_ring
*tx_ring
, int tx_flags
, int count
)
4873 struct e1000_adapter
*adapter
= tx_ring
->adapter
;
4874 struct e1000_tx_desc
*tx_desc
= NULL
;
4875 struct e1000_buffer
*buffer_info
;
4876 u32 txd_upper
= 0, txd_lower
= E1000_TXD_CMD_IFCS
;
4879 if (tx_flags
& E1000_TX_FLAGS_TSO
) {
4880 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
|
4882 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
4884 if (tx_flags
& E1000_TX_FLAGS_IPV4
)
4885 txd_upper
|= E1000_TXD_POPTS_IXSM
<< 8;
4888 if (tx_flags
& E1000_TX_FLAGS_CSUM
) {
4889 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
;
4890 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
4893 if (tx_flags
& E1000_TX_FLAGS_VLAN
) {
4894 txd_lower
|= E1000_TXD_CMD_VLE
;
4895 txd_upper
|= (tx_flags
& E1000_TX_FLAGS_VLAN_MASK
);
4898 if (unlikely(tx_flags
& E1000_TX_FLAGS_NO_FCS
))
4899 txd_lower
&= ~(E1000_TXD_CMD_IFCS
);
4901 i
= tx_ring
->next_to_use
;
4904 buffer_info
= &tx_ring
->buffer_info
[i
];
4905 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
4906 tx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
4907 tx_desc
->lower
.data
=
4908 cpu_to_le32(txd_lower
| buffer_info
->length
);
4909 tx_desc
->upper
.data
= cpu_to_le32(txd_upper
);
4912 if (i
== tx_ring
->count
)
4914 } while (--count
> 0);
4916 tx_desc
->lower
.data
|= cpu_to_le32(adapter
->txd_cmd
);
4918 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
4919 if (unlikely(tx_flags
& E1000_TX_FLAGS_NO_FCS
))
4920 tx_desc
->lower
.data
&= ~(cpu_to_le32(E1000_TXD_CMD_IFCS
));
4923 * Force memory writes to complete before letting h/w
4924 * know there are new descriptors to fetch. (Only
4925 * applicable for weak-ordered memory model archs,
4930 tx_ring
->next_to_use
= i
;
4932 if (adapter
->flags2
& FLAG2_PCIM2PCI_ARBITER_WA
)
4933 e1000e_update_tdt_wa(tx_ring
, i
);
4935 writel(i
, tx_ring
->tail
);
4938 * we need this if more than one processor can write to our tail
4939 * at a time, it synchronizes IO on IA64/Altix systems
4944 #define MINIMUM_DHCP_PACKET_SIZE 282
4945 static int e1000_transfer_dhcp_info(struct e1000_adapter
*adapter
,
4946 struct sk_buff
*skb
)
4948 struct e1000_hw
*hw
= &adapter
->hw
;
4951 if (vlan_tx_tag_present(skb
)) {
4952 if (!((vlan_tx_tag_get(skb
) == adapter
->hw
.mng_cookie
.vlan_id
) &&
4953 (adapter
->hw
.mng_cookie
.status
&
4954 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
)))
4958 if (skb
->len
<= MINIMUM_DHCP_PACKET_SIZE
)
4961 if (((struct ethhdr
*) skb
->data
)->h_proto
!= htons(ETH_P_IP
))
4965 const struct iphdr
*ip
= (struct iphdr
*)((u8
*)skb
->data
+14);
4968 if (ip
->protocol
!= IPPROTO_UDP
)
4971 udp
= (struct udphdr
*)((u8
*)ip
+ (ip
->ihl
<< 2));
4972 if (ntohs(udp
->dest
) != 67)
4975 offset
= (u8
*)udp
+ 8 - skb
->data
;
4976 length
= skb
->len
- offset
;
4977 return e1000e_mng_write_dhcp_info(hw
, (u8
*)udp
+ 8, length
);
4983 static int __e1000_maybe_stop_tx(struct e1000_ring
*tx_ring
, int size
)
4985 struct e1000_adapter
*adapter
= tx_ring
->adapter
;
4987 netif_stop_queue(adapter
->netdev
);
4989 * Herbert's original patch had:
4990 * smp_mb__after_netif_stop_queue();
4991 * but since that doesn't exist yet, just open code it.
4996 * We need to check again in a case another CPU has just
4997 * made room available.
4999 if (e1000_desc_unused(tx_ring
) < size
)
5003 netif_start_queue(adapter
->netdev
);
5004 ++adapter
->restart_queue
;
5008 static int e1000_maybe_stop_tx(struct e1000_ring
*tx_ring
, int size
)
5010 if (e1000_desc_unused(tx_ring
) >= size
)
5012 return __e1000_maybe_stop_tx(tx_ring
, size
);
5015 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1)
5016 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
5017 struct net_device
*netdev
)
5019 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5020 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
5022 unsigned int max_per_txd
= E1000_MAX_PER_TXD
;
5023 unsigned int max_txd_pwr
= E1000_MAX_TXD_PWR
;
5024 unsigned int tx_flags
= 0;
5025 unsigned int len
= skb_headlen(skb
);
5026 unsigned int nr_frags
;
5032 if (test_bit(__E1000_DOWN
, &adapter
->state
)) {
5033 dev_kfree_skb_any(skb
);
5034 return NETDEV_TX_OK
;
5037 if (skb
->len
<= 0) {
5038 dev_kfree_skb_any(skb
);
5039 return NETDEV_TX_OK
;
5042 mss
= skb_shinfo(skb
)->gso_size
;
5044 * The controller does a simple calculation to
5045 * make sure there is enough room in the FIFO before
5046 * initiating the DMA for each buffer. The calc is:
5047 * 4 = ceil(buffer len/mss). To make sure we don't
5048 * overrun the FIFO, adjust the max buffer len if mss
5053 max_per_txd
= min(mss
<< 2, max_per_txd
);
5054 max_txd_pwr
= fls(max_per_txd
) - 1;
5057 * TSO Workaround for 82571/2/3 Controllers -- if skb->data
5058 * points to just header, pull a few bytes of payload from
5059 * frags into skb->data
5061 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
5063 * we do this workaround for ES2LAN, but it is un-necessary,
5064 * avoiding it could save a lot of cycles
5066 if (skb
->data_len
&& (hdr_len
== len
)) {
5067 unsigned int pull_size
;
5069 pull_size
= min_t(unsigned int, 4, skb
->data_len
);
5070 if (!__pskb_pull_tail(skb
, pull_size
)) {
5071 e_err("__pskb_pull_tail failed.\n");
5072 dev_kfree_skb_any(skb
);
5073 return NETDEV_TX_OK
;
5075 len
= skb_headlen(skb
);
5079 /* reserve a descriptor for the offload context */
5080 if ((mss
) || (skb
->ip_summed
== CHECKSUM_PARTIAL
))
5084 count
+= TXD_USE_COUNT(len
, max_txd_pwr
);
5086 nr_frags
= skb_shinfo(skb
)->nr_frags
;
5087 for (f
= 0; f
< nr_frags
; f
++)
5088 count
+= TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb
)->frags
[f
]),
5091 if (adapter
->hw
.mac
.tx_pkt_filtering
)
5092 e1000_transfer_dhcp_info(adapter
, skb
);
5095 * need: count + 2 desc gap to keep tail from touching
5096 * head, otherwise try next time
5098 if (e1000_maybe_stop_tx(tx_ring
, count
+ 2))
5099 return NETDEV_TX_BUSY
;
5101 if (vlan_tx_tag_present(skb
)) {
5102 tx_flags
|= E1000_TX_FLAGS_VLAN
;
5103 tx_flags
|= (vlan_tx_tag_get(skb
) << E1000_TX_FLAGS_VLAN_SHIFT
);
5106 first
= tx_ring
->next_to_use
;
5108 tso
= e1000_tso(tx_ring
, skb
);
5110 dev_kfree_skb_any(skb
);
5111 return NETDEV_TX_OK
;
5115 tx_flags
|= E1000_TX_FLAGS_TSO
;
5116 else if (e1000_tx_csum(tx_ring
, skb
))
5117 tx_flags
|= E1000_TX_FLAGS_CSUM
;
5120 * Old method was to assume IPv4 packet by default if TSO was enabled.
5121 * 82571 hardware supports TSO capabilities for IPv6 as well...
5122 * no longer assume, we must.
5124 if (skb
->protocol
== htons(ETH_P_IP
))
5125 tx_flags
|= E1000_TX_FLAGS_IPV4
;
5127 if (unlikely(skb
->no_fcs
))
5128 tx_flags
|= E1000_TX_FLAGS_NO_FCS
;
5130 /* if count is 0 then mapping error has occurred */
5131 count
= e1000_tx_map(tx_ring
, skb
, first
, max_per_txd
, nr_frags
, mss
);
5133 skb_tx_timestamp(skb
);
5135 netdev_sent_queue(netdev
, skb
->len
);
5136 e1000_tx_queue(tx_ring
, tx_flags
, count
);
5137 /* Make sure there is space in the ring for the next send. */
5138 e1000_maybe_stop_tx(tx_ring
, MAX_SKB_FRAGS
+ 2);
5141 dev_kfree_skb_any(skb
);
5142 tx_ring
->buffer_info
[first
].time_stamp
= 0;
5143 tx_ring
->next_to_use
= first
;
5146 return NETDEV_TX_OK
;
5150 * e1000_tx_timeout - Respond to a Tx Hang
5151 * @netdev: network interface device structure
5153 static void e1000_tx_timeout(struct net_device
*netdev
)
5155 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5157 /* Do the reset outside of interrupt context */
5158 adapter
->tx_timeout_count
++;
5159 schedule_work(&adapter
->reset_task
);
5162 static void e1000_reset_task(struct work_struct
*work
)
5164 struct e1000_adapter
*adapter
;
5165 adapter
= container_of(work
, struct e1000_adapter
, reset_task
);
5167 /* don't run the task if already down */
5168 if (test_bit(__E1000_DOWN
, &adapter
->state
))
5171 if (!((adapter
->flags
& FLAG_RX_NEEDS_RESTART
) &&
5172 (adapter
->flags
& FLAG_RX_RESTART_NOW
))) {
5173 e1000e_dump(adapter
);
5174 e_err("Reset adapter\n");
5176 e1000e_reinit_locked(adapter
);
5180 * e1000_get_stats64 - Get System Network Statistics
5181 * @netdev: network interface device structure
5182 * @stats: rtnl_link_stats64 pointer
5184 * Returns the address of the device statistics structure.
5186 struct rtnl_link_stats64
*e1000e_get_stats64(struct net_device
*netdev
,
5187 struct rtnl_link_stats64
*stats
)
5189 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5191 memset(stats
, 0, sizeof(struct rtnl_link_stats64
));
5192 spin_lock(&adapter
->stats64_lock
);
5193 e1000e_update_stats(adapter
);
5194 /* Fill out the OS statistics structure */
5195 stats
->rx_bytes
= adapter
->stats
.gorc
;
5196 stats
->rx_packets
= adapter
->stats
.gprc
;
5197 stats
->tx_bytes
= adapter
->stats
.gotc
;
5198 stats
->tx_packets
= adapter
->stats
.gptc
;
5199 stats
->multicast
= adapter
->stats
.mprc
;
5200 stats
->collisions
= adapter
->stats
.colc
;
5205 * RLEC on some newer hardware can be incorrect so build
5206 * our own version based on RUC and ROC
5208 stats
->rx_errors
= adapter
->stats
.rxerrc
+
5209 adapter
->stats
.crcerrs
+ adapter
->stats
.algnerrc
+
5210 adapter
->stats
.ruc
+ adapter
->stats
.roc
+
5211 adapter
->stats
.cexterr
;
5212 stats
->rx_length_errors
= adapter
->stats
.ruc
+
5214 stats
->rx_crc_errors
= adapter
->stats
.crcerrs
;
5215 stats
->rx_frame_errors
= adapter
->stats
.algnerrc
;
5216 stats
->rx_missed_errors
= adapter
->stats
.mpc
;
5219 stats
->tx_errors
= adapter
->stats
.ecol
+
5220 adapter
->stats
.latecol
;
5221 stats
->tx_aborted_errors
= adapter
->stats
.ecol
;
5222 stats
->tx_window_errors
= adapter
->stats
.latecol
;
5223 stats
->tx_carrier_errors
= adapter
->stats
.tncrs
;
5225 /* Tx Dropped needs to be maintained elsewhere */
5227 spin_unlock(&adapter
->stats64_lock
);
5232 * e1000_change_mtu - Change the Maximum Transfer Unit
5233 * @netdev: network interface device structure
5234 * @new_mtu: new value for maximum frame size
5236 * Returns 0 on success, negative on failure
5238 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
)
5240 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5241 int max_frame
= new_mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
5243 /* Jumbo frame support */
5244 if (max_frame
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) {
5245 if (!(adapter
->flags
& FLAG_HAS_JUMBO_FRAMES
)) {
5246 e_err("Jumbo Frames not supported.\n");
5251 * IP payload checksum (enabled with jumbos/packet-split when
5252 * Rx checksum is enabled) and generation of RSS hash is
5253 * mutually exclusive in the hardware.
5255 if ((netdev
->features
& NETIF_F_RXCSUM
) &&
5256 (netdev
->features
& NETIF_F_RXHASH
)) {
5257 e_err("Jumbo frames cannot be enabled when both receive checksum offload and receive hashing are enabled. Disable one of the receive offload features before enabling jumbos.\n");
5262 /* Supported frame sizes */
5263 if ((new_mtu
< ETH_ZLEN
+ ETH_FCS_LEN
+ VLAN_HLEN
) ||
5264 (max_frame
> adapter
->max_hw_frame_size
)) {
5265 e_err("Unsupported MTU setting\n");
5269 /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */
5270 if ((adapter
->hw
.mac
.type
>= e1000_pch2lan
) &&
5271 !(adapter
->flags2
& FLAG2_CRC_STRIPPING
) &&
5272 (new_mtu
> ETH_DATA_LEN
)) {
5273 e_err("Jumbo Frames not supported on this device when CRC stripping is disabled.\n");
5277 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->state
))
5278 usleep_range(1000, 2000);
5279 /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
5280 adapter
->max_frame_size
= max_frame
;
5281 e_info("changing MTU from %d to %d\n", netdev
->mtu
, new_mtu
);
5282 netdev
->mtu
= new_mtu
;
5283 if (netif_running(netdev
))
5284 e1000e_down(adapter
);
5287 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
5288 * means we reserve 2 more, this pushes us to allocate from the next
5290 * i.e. RXBUFFER_2048 --> size-4096 slab
5291 * However with the new *_jumbo_rx* routines, jumbo receives will use
5295 if (max_frame
<= 2048)
5296 adapter
->rx_buffer_len
= 2048;
5298 adapter
->rx_buffer_len
= 4096;
5300 /* adjust allocation if LPE protects us, and we aren't using SBP */
5301 if ((max_frame
== ETH_FRAME_LEN
+ ETH_FCS_LEN
) ||
5302 (max_frame
== ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
))
5303 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
5306 if (netif_running(netdev
))
5309 e1000e_reset(adapter
);
5311 clear_bit(__E1000_RESETTING
, &adapter
->state
);
5316 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
5319 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5320 struct mii_ioctl_data
*data
= if_mii(ifr
);
5322 if (adapter
->hw
.phy
.media_type
!= e1000_media_type_copper
)
5327 data
->phy_id
= adapter
->hw
.phy
.addr
;
5330 e1000_phy_read_status(adapter
);
5332 switch (data
->reg_num
& 0x1F) {
5334 data
->val_out
= adapter
->phy_regs
.bmcr
;
5337 data
->val_out
= adapter
->phy_regs
.bmsr
;
5340 data
->val_out
= (adapter
->hw
.phy
.id
>> 16);
5343 data
->val_out
= (adapter
->hw
.phy
.id
& 0xFFFF);
5346 data
->val_out
= adapter
->phy_regs
.advertise
;
5349 data
->val_out
= adapter
->phy_regs
.lpa
;
5352 data
->val_out
= adapter
->phy_regs
.expansion
;
5355 data
->val_out
= adapter
->phy_regs
.ctrl1000
;
5358 data
->val_out
= adapter
->phy_regs
.stat1000
;
5361 data
->val_out
= adapter
->phy_regs
.estatus
;
5374 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
5380 return e1000_mii_ioctl(netdev
, ifr
, cmd
);
5386 static int e1000_init_phy_wakeup(struct e1000_adapter
*adapter
, u32 wufc
)
5388 struct e1000_hw
*hw
= &adapter
->hw
;
5390 u16 phy_reg
, wuc_enable
;
5393 /* copy MAC RARs to PHY RARs */
5394 e1000_copy_rx_addrs_to_phy_ich8lan(hw
);
5396 retval
= hw
->phy
.ops
.acquire(hw
);
5398 e_err("Could not acquire PHY\n");
5402 /* Enable access to wakeup registers on and set page to BM_WUC_PAGE */
5403 retval
= e1000_enable_phy_wakeup_reg_access_bm(hw
, &wuc_enable
);
5407 /* copy MAC MTA to PHY MTA - only needed for pchlan */
5408 for (i
= 0; i
< adapter
->hw
.mac
.mta_reg_count
; i
++) {
5409 mac_reg
= E1000_READ_REG_ARRAY(hw
, E1000_MTA
, i
);
5410 hw
->phy
.ops
.write_reg_page(hw
, BM_MTA(i
),
5411 (u16
)(mac_reg
& 0xFFFF));
5412 hw
->phy
.ops
.write_reg_page(hw
, BM_MTA(i
) + 1,
5413 (u16
)((mac_reg
>> 16) & 0xFFFF));
5416 /* configure PHY Rx Control register */
5417 hw
->phy
.ops
.read_reg_page(&adapter
->hw
, BM_RCTL
, &phy_reg
);
5418 mac_reg
= er32(RCTL
);
5419 if (mac_reg
& E1000_RCTL_UPE
)
5420 phy_reg
|= BM_RCTL_UPE
;
5421 if (mac_reg
& E1000_RCTL_MPE
)
5422 phy_reg
|= BM_RCTL_MPE
;
5423 phy_reg
&= ~(BM_RCTL_MO_MASK
);
5424 if (mac_reg
& E1000_RCTL_MO_3
)
5425 phy_reg
|= (((mac_reg
& E1000_RCTL_MO_3
) >> E1000_RCTL_MO_SHIFT
)
5426 << BM_RCTL_MO_SHIFT
);
5427 if (mac_reg
& E1000_RCTL_BAM
)
5428 phy_reg
|= BM_RCTL_BAM
;
5429 if (mac_reg
& E1000_RCTL_PMCF
)
5430 phy_reg
|= BM_RCTL_PMCF
;
5431 mac_reg
= er32(CTRL
);
5432 if (mac_reg
& E1000_CTRL_RFCE
)
5433 phy_reg
|= BM_RCTL_RFCE
;
5434 hw
->phy
.ops
.write_reg_page(&adapter
->hw
, BM_RCTL
, phy_reg
);
5436 /* enable PHY wakeup in MAC register */
5438 ew32(WUC
, E1000_WUC_PHY_WAKE
| E1000_WUC_PME_EN
);
5440 /* configure and enable PHY wakeup in PHY registers */
5441 hw
->phy
.ops
.write_reg_page(&adapter
->hw
, BM_WUFC
, wufc
);
5442 hw
->phy
.ops
.write_reg_page(&adapter
->hw
, BM_WUC
, E1000_WUC_PME_EN
);
5444 /* activate PHY wakeup */
5445 wuc_enable
|= BM_WUC_ENABLE_BIT
| BM_WUC_HOST_WU_BIT
;
5446 retval
= e1000_disable_phy_wakeup_reg_access_bm(hw
, &wuc_enable
);
5448 e_err("Could not set PHY Host Wakeup bit\n");
5450 hw
->phy
.ops
.release(hw
);
5455 static int __e1000_shutdown(struct pci_dev
*pdev
, bool *enable_wake
,
5458 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5459 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5460 struct e1000_hw
*hw
= &adapter
->hw
;
5461 u32 ctrl
, ctrl_ext
, rctl
, status
;
5462 /* Runtime suspend should only enable wakeup for link changes */
5463 u32 wufc
= runtime
? E1000_WUFC_LNKC
: adapter
->wol
;
5466 netif_device_detach(netdev
);
5468 if (netif_running(netdev
)) {
5469 int count
= E1000_CHECK_RESET_COUNT
;
5471 while (test_bit(__E1000_RESETTING
, &adapter
->state
) && count
--)
5472 usleep_range(10000, 20000);
5474 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->state
));
5475 e1000e_down(adapter
);
5476 e1000_free_irq(adapter
);
5478 e1000e_reset_interrupt_capability(adapter
);
5480 retval
= pci_save_state(pdev
);
5484 status
= er32(STATUS
);
5485 if (status
& E1000_STATUS_LU
)
5486 wufc
&= ~E1000_WUFC_LNKC
;
5489 e1000_setup_rctl(adapter
);
5490 e1000e_set_rx_mode(netdev
);
5492 /* turn on all-multi mode if wake on multicast is enabled */
5493 if (wufc
& E1000_WUFC_MC
) {
5495 rctl
|= E1000_RCTL_MPE
;
5500 /* advertise wake from D3Cold */
5501 #define E1000_CTRL_ADVD3WUC 0x00100000
5502 /* phy power management enable */
5503 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5504 ctrl
|= E1000_CTRL_ADVD3WUC
;
5505 if (!(adapter
->flags2
& FLAG2_HAS_PHY_WAKEUP
))
5506 ctrl
|= E1000_CTRL_EN_PHY_PWR_MGMT
;
5509 if (adapter
->hw
.phy
.media_type
== e1000_media_type_fiber
||
5510 adapter
->hw
.phy
.media_type
==
5511 e1000_media_type_internal_serdes
) {
5512 /* keep the laser running in D3 */
5513 ctrl_ext
= er32(CTRL_EXT
);
5514 ctrl_ext
|= E1000_CTRL_EXT_SDP3_DATA
;
5515 ew32(CTRL_EXT
, ctrl_ext
);
5518 if (adapter
->flags
& FLAG_IS_ICH
)
5519 e1000_suspend_workarounds_ich8lan(&adapter
->hw
);
5521 /* Allow time for pending master requests to run */
5522 e1000e_disable_pcie_master(&adapter
->hw
);
5524 if (adapter
->flags2
& FLAG2_HAS_PHY_WAKEUP
) {
5525 /* enable wakeup by the PHY */
5526 retval
= e1000_init_phy_wakeup(adapter
, wufc
);
5530 /* enable wakeup by the MAC */
5532 ew32(WUC
, E1000_WUC_PME_EN
);
5539 *enable_wake
= !!wufc
;
5541 /* make sure adapter isn't asleep if manageability is enabled */
5542 if ((adapter
->flags
& FLAG_MNG_PT_ENABLED
) ||
5543 (hw
->mac
.ops
.check_mng_mode(hw
)))
5544 *enable_wake
= true;
5546 if (adapter
->hw
.phy
.type
== e1000_phy_igp_3
)
5547 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter
->hw
);
5550 * Release control of h/w to f/w. If f/w is AMT enabled, this
5551 * would have already happened in close and is redundant.
5553 e1000e_release_hw_control(adapter
);
5555 pci_disable_device(pdev
);
5560 static void e1000_power_off(struct pci_dev
*pdev
, bool sleep
, bool wake
)
5562 if (sleep
&& wake
) {
5563 pci_prepare_to_sleep(pdev
);
5567 pci_wake_from_d3(pdev
, wake
);
5568 pci_set_power_state(pdev
, PCI_D3hot
);
5571 static void e1000_complete_shutdown(struct pci_dev
*pdev
, bool sleep
,
5574 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5575 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5578 * The pci-e switch on some quad port adapters will report a
5579 * correctable error when the MAC transitions from D0 to D3. To
5580 * prevent this we need to mask off the correctable errors on the
5581 * downstream port of the pci-e switch.
5583 if (adapter
->flags
& FLAG_IS_QUAD_PORT
) {
5584 struct pci_dev
*us_dev
= pdev
->bus
->self
;
5585 int pos
= pci_pcie_cap(us_dev
);
5588 pci_read_config_word(us_dev
, pos
+ PCI_EXP_DEVCTL
, &devctl
);
5589 pci_write_config_word(us_dev
, pos
+ PCI_EXP_DEVCTL
,
5590 (devctl
& ~PCI_EXP_DEVCTL_CERE
));
5592 e1000_power_off(pdev
, sleep
, wake
);
5594 pci_write_config_word(us_dev
, pos
+ PCI_EXP_DEVCTL
, devctl
);
5596 e1000_power_off(pdev
, sleep
, wake
);
5600 #ifdef CONFIG_PCIEASPM
5601 static void __e1000e_disable_aspm(struct pci_dev
*pdev
, u16 state
)
5603 pci_disable_link_state_locked(pdev
, state
);
5606 static void __e1000e_disable_aspm(struct pci_dev
*pdev
, u16 state
)
5612 * Both device and parent should have the same ASPM setting.
5613 * Disable ASPM in downstream component first and then upstream.
5615 pos
= pci_pcie_cap(pdev
);
5616 pci_read_config_word(pdev
, pos
+ PCI_EXP_LNKCTL
, ®16
);
5618 pci_write_config_word(pdev
, pos
+ PCI_EXP_LNKCTL
, reg16
);
5620 if (!pdev
->bus
->self
)
5623 pos
= pci_pcie_cap(pdev
->bus
->self
);
5624 pci_read_config_word(pdev
->bus
->self
, pos
+ PCI_EXP_LNKCTL
, ®16
);
5626 pci_write_config_word(pdev
->bus
->self
, pos
+ PCI_EXP_LNKCTL
, reg16
);
5629 static void e1000e_disable_aspm(struct pci_dev
*pdev
, u16 state
)
5631 dev_info(&pdev
->dev
, "Disabling ASPM %s %s\n",
5632 (state
& PCIE_LINK_STATE_L0S
) ? "L0s" : "",
5633 (state
& PCIE_LINK_STATE_L1
) ? "L1" : "");
5635 __e1000e_disable_aspm(pdev
, state
);
5639 static bool e1000e_pm_ready(struct e1000_adapter
*adapter
)
5641 return !!adapter
->tx_ring
->buffer_info
;
5644 static int __e1000_resume(struct pci_dev
*pdev
)
5646 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5647 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5648 struct e1000_hw
*hw
= &adapter
->hw
;
5649 u16 aspm_disable_flag
= 0;
5652 if (adapter
->flags2
& FLAG2_DISABLE_ASPM_L0S
)
5653 aspm_disable_flag
= PCIE_LINK_STATE_L0S
;
5654 if (adapter
->flags2
& FLAG2_DISABLE_ASPM_L1
)
5655 aspm_disable_flag
|= PCIE_LINK_STATE_L1
;
5656 if (aspm_disable_flag
)
5657 e1000e_disable_aspm(pdev
, aspm_disable_flag
);
5659 pci_set_power_state(pdev
, PCI_D0
);
5660 pci_restore_state(pdev
);
5661 pci_save_state(pdev
);
5663 e1000e_set_interrupt_capability(adapter
);
5664 if (netif_running(netdev
)) {
5665 err
= e1000_request_irq(adapter
);
5670 if (hw
->mac
.type
>= e1000_pch2lan
)
5671 e1000_resume_workarounds_pchlan(&adapter
->hw
);
5673 e1000e_power_up_phy(adapter
);
5675 /* report the system wakeup cause from S3/S4 */
5676 if (adapter
->flags2
& FLAG2_HAS_PHY_WAKEUP
) {
5679 e1e_rphy(&adapter
->hw
, BM_WUS
, &phy_data
);
5681 e_info("PHY Wakeup cause - %s\n",
5682 phy_data
& E1000_WUS_EX
? "Unicast Packet" :
5683 phy_data
& E1000_WUS_MC
? "Multicast Packet" :
5684 phy_data
& E1000_WUS_BC
? "Broadcast Packet" :
5685 phy_data
& E1000_WUS_MAG
? "Magic Packet" :
5686 phy_data
& E1000_WUS_LNKC
?
5687 "Link Status Change" : "other");
5689 e1e_wphy(&adapter
->hw
, BM_WUS
, ~0);
5691 u32 wus
= er32(WUS
);
5693 e_info("MAC Wakeup cause - %s\n",
5694 wus
& E1000_WUS_EX
? "Unicast Packet" :
5695 wus
& E1000_WUS_MC
? "Multicast Packet" :
5696 wus
& E1000_WUS_BC
? "Broadcast Packet" :
5697 wus
& E1000_WUS_MAG
? "Magic Packet" :
5698 wus
& E1000_WUS_LNKC
? "Link Status Change" :
5704 e1000e_reset(adapter
);
5706 e1000_init_manageability_pt(adapter
);
5708 if (netif_running(netdev
))
5711 netif_device_attach(netdev
);
5714 * If the controller has AMT, do not set DRV_LOAD until the interface
5715 * is up. For all other cases, let the f/w know that the h/w is now
5716 * under the control of the driver.
5718 if (!(adapter
->flags
& FLAG_HAS_AMT
))
5719 e1000e_get_hw_control(adapter
);
5724 #ifdef CONFIG_PM_SLEEP
5725 static int e1000_suspend(struct device
*dev
)
5727 struct pci_dev
*pdev
= to_pci_dev(dev
);
5731 retval
= __e1000_shutdown(pdev
, &wake
, false);
5733 e1000_complete_shutdown(pdev
, true, wake
);
5738 static int e1000_resume(struct device
*dev
)
5740 struct pci_dev
*pdev
= to_pci_dev(dev
);
5741 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5742 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5744 if (e1000e_pm_ready(adapter
))
5745 adapter
->idle_check
= true;
5747 return __e1000_resume(pdev
);
5749 #endif /* CONFIG_PM_SLEEP */
5751 #ifdef CONFIG_PM_RUNTIME
5752 static int e1000_runtime_suspend(struct device
*dev
)
5754 struct pci_dev
*pdev
= to_pci_dev(dev
);
5755 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5756 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5758 if (e1000e_pm_ready(adapter
)) {
5761 __e1000_shutdown(pdev
, &wake
, true);
5767 static int e1000_idle(struct device
*dev
)
5769 struct pci_dev
*pdev
= to_pci_dev(dev
);
5770 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5771 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5773 if (!e1000e_pm_ready(adapter
))
5776 if (adapter
->idle_check
) {
5777 adapter
->idle_check
= false;
5778 if (!e1000e_has_link(adapter
))
5779 pm_schedule_suspend(dev
, MSEC_PER_SEC
);
5785 static int e1000_runtime_resume(struct device
*dev
)
5787 struct pci_dev
*pdev
= to_pci_dev(dev
);
5788 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5789 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5791 if (!e1000e_pm_ready(adapter
))
5794 adapter
->idle_check
= !dev
->power
.runtime_auto
;
5795 return __e1000_resume(pdev
);
5797 #endif /* CONFIG_PM_RUNTIME */
5798 #endif /* CONFIG_PM */
5800 static void e1000_shutdown(struct pci_dev
*pdev
)
5804 __e1000_shutdown(pdev
, &wake
, false);
5806 if (system_state
== SYSTEM_POWER_OFF
)
5807 e1000_complete_shutdown(pdev
, false, wake
);
5810 #ifdef CONFIG_NET_POLL_CONTROLLER
5812 static irqreturn_t
e1000_intr_msix(int irq
, void *data
)
5814 struct net_device
*netdev
= data
;
5815 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5817 if (adapter
->msix_entries
) {
5818 int vector
, msix_irq
;
5821 msix_irq
= adapter
->msix_entries
[vector
].vector
;
5822 disable_irq(msix_irq
);
5823 e1000_intr_msix_rx(msix_irq
, netdev
);
5824 enable_irq(msix_irq
);
5827 msix_irq
= adapter
->msix_entries
[vector
].vector
;
5828 disable_irq(msix_irq
);
5829 e1000_intr_msix_tx(msix_irq
, netdev
);
5830 enable_irq(msix_irq
);
5833 msix_irq
= adapter
->msix_entries
[vector
].vector
;
5834 disable_irq(msix_irq
);
5835 e1000_msix_other(msix_irq
, netdev
);
5836 enable_irq(msix_irq
);
5843 * Polling 'interrupt' - used by things like netconsole to send skbs
5844 * without having to re-enable interrupts. It's not called while
5845 * the interrupt routine is executing.
5847 static void e1000_netpoll(struct net_device
*netdev
)
5849 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5851 switch (adapter
->int_mode
) {
5852 case E1000E_INT_MODE_MSIX
:
5853 e1000_intr_msix(adapter
->pdev
->irq
, netdev
);
5855 case E1000E_INT_MODE_MSI
:
5856 disable_irq(adapter
->pdev
->irq
);
5857 e1000_intr_msi(adapter
->pdev
->irq
, netdev
);
5858 enable_irq(adapter
->pdev
->irq
);
5860 default: /* E1000E_INT_MODE_LEGACY */
5861 disable_irq(adapter
->pdev
->irq
);
5862 e1000_intr(adapter
->pdev
->irq
, netdev
);
5863 enable_irq(adapter
->pdev
->irq
);
5870 * e1000_io_error_detected - called when PCI error is detected
5871 * @pdev: Pointer to PCI device
5872 * @state: The current pci connection state
5874 * This function is called after a PCI bus error affecting
5875 * this device has been detected.
5877 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
5878 pci_channel_state_t state
)
5880 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5881 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5883 netif_device_detach(netdev
);
5885 if (state
== pci_channel_io_perm_failure
)
5886 return PCI_ERS_RESULT_DISCONNECT
;
5888 if (netif_running(netdev
))
5889 e1000e_down(adapter
);
5890 pci_disable_device(pdev
);
5892 /* Request a slot slot reset. */
5893 return PCI_ERS_RESULT_NEED_RESET
;
5897 * e1000_io_slot_reset - called after the pci bus has been reset.
5898 * @pdev: Pointer to PCI device
5900 * Restart the card from scratch, as if from a cold-boot. Implementation
5901 * resembles the first-half of the e1000_resume routine.
5903 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
)
5905 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5906 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5907 struct e1000_hw
*hw
= &adapter
->hw
;
5908 u16 aspm_disable_flag
= 0;
5910 pci_ers_result_t result
;
5912 if (adapter
->flags2
& FLAG2_DISABLE_ASPM_L0S
)
5913 aspm_disable_flag
= PCIE_LINK_STATE_L0S
;
5914 if (adapter
->flags2
& FLAG2_DISABLE_ASPM_L1
)
5915 aspm_disable_flag
|= PCIE_LINK_STATE_L1
;
5916 if (aspm_disable_flag
)
5917 e1000e_disable_aspm(pdev
, aspm_disable_flag
);
5919 err
= pci_enable_device_mem(pdev
);
5922 "Cannot re-enable PCI device after reset.\n");
5923 result
= PCI_ERS_RESULT_DISCONNECT
;
5925 pci_set_master(pdev
);
5926 pdev
->state_saved
= true;
5927 pci_restore_state(pdev
);
5929 pci_enable_wake(pdev
, PCI_D3hot
, 0);
5930 pci_enable_wake(pdev
, PCI_D3cold
, 0);
5932 e1000e_reset(adapter
);
5934 result
= PCI_ERS_RESULT_RECOVERED
;
5937 pci_cleanup_aer_uncorrect_error_status(pdev
);
5943 * e1000_io_resume - called when traffic can start flowing again.
5944 * @pdev: Pointer to PCI device
5946 * This callback is called when the error recovery driver tells us that
5947 * its OK to resume normal operation. Implementation resembles the
5948 * second-half of the e1000_resume routine.
5950 static void e1000_io_resume(struct pci_dev
*pdev
)
5952 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5953 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5955 e1000_init_manageability_pt(adapter
);
5957 if (netif_running(netdev
)) {
5958 if (e1000e_up(adapter
)) {
5960 "can't bring device back up after reset\n");
5965 netif_device_attach(netdev
);
5968 * If the controller has AMT, do not set DRV_LOAD until the interface
5969 * is up. For all other cases, let the f/w know that the h/w is now
5970 * under the control of the driver.
5972 if (!(adapter
->flags
& FLAG_HAS_AMT
))
5973 e1000e_get_hw_control(adapter
);
5977 static void e1000_print_device_info(struct e1000_adapter
*adapter
)
5979 struct e1000_hw
*hw
= &adapter
->hw
;
5980 struct net_device
*netdev
= adapter
->netdev
;
5982 u8 pba_str
[E1000_PBANUM_LENGTH
];
5984 /* print bus type/speed/width info */
5985 e_info("(PCI Express:2.5GT/s:%s) %pM\n",
5987 ((hw
->bus
.width
== e1000_bus_width_pcie_x4
) ? "Width x4" :
5991 e_info("Intel(R) PRO/%s Network Connection\n",
5992 (hw
->phy
.type
== e1000_phy_ife
) ? "10/100" : "1000");
5993 ret_val
= e1000_read_pba_string_generic(hw
, pba_str
,
5994 E1000_PBANUM_LENGTH
);
5996 strlcpy((char *)pba_str
, "Unknown", sizeof(pba_str
));
5997 e_info("MAC: %d, PHY: %d, PBA No: %s\n",
5998 hw
->mac
.type
, hw
->phy
.type
, pba_str
);
6001 static void e1000_eeprom_checks(struct e1000_adapter
*adapter
)
6003 struct e1000_hw
*hw
= &adapter
->hw
;
6007 if (hw
->mac
.type
!= e1000_82573
)
6010 ret_val
= e1000_read_nvm(hw
, NVM_INIT_CONTROL2_REG
, 1, &buf
);
6012 if (!ret_val
&& (!(buf
& (1 << 0)))) {
6013 /* Deep Smart Power Down (DSPD) */
6014 dev_warn(&adapter
->pdev
->dev
,
6015 "Warning: detected DSPD enabled in EEPROM\n");
6019 static int e1000_set_features(struct net_device
*netdev
,
6020 netdev_features_t features
)
6022 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
6023 netdev_features_t changed
= features
^ netdev
->features
;
6025 if (changed
& (NETIF_F_TSO
| NETIF_F_TSO6
))
6026 adapter
->flags
|= FLAG_TSO_FORCE
;
6028 if (!(changed
& (NETIF_F_HW_VLAN_RX
| NETIF_F_HW_VLAN_TX
|
6029 NETIF_F_RXCSUM
| NETIF_F_RXHASH
| NETIF_F_RXFCS
|
6034 * IP payload checksum (enabled with jumbos/packet-split when Rx
6035 * checksum is enabled) and generation of RSS hash is mutually
6036 * exclusive in the hardware.
6038 if (adapter
->rx_ps_pages
&&
6039 (features
& NETIF_F_RXCSUM
) && (features
& NETIF_F_RXHASH
)) {
6040 e_err("Enabling both receive checksum offload and receive hashing is not possible with jumbo frames. Disable jumbos or enable only one of the receive offload features.\n");
6044 if (changed
& NETIF_F_RXFCS
) {
6045 if (features
& NETIF_F_RXFCS
) {
6046 adapter
->flags2
&= ~FLAG2_CRC_STRIPPING
;
6048 /* We need to take it back to defaults, which might mean
6049 * stripping is still disabled at the adapter level.
6051 if (adapter
->flags2
& FLAG2_DFLT_CRC_STRIPPING
)
6052 adapter
->flags2
|= FLAG2_CRC_STRIPPING
;
6054 adapter
->flags2
&= ~FLAG2_CRC_STRIPPING
;
6058 netdev
->features
= features
;
6060 if (netif_running(netdev
))
6061 e1000e_reinit_locked(adapter
);
6063 e1000e_reset(adapter
);
6068 static const struct net_device_ops e1000e_netdev_ops
= {
6069 .ndo_open
= e1000_open
,
6070 .ndo_stop
= e1000_close
,
6071 .ndo_start_xmit
= e1000_xmit_frame
,
6072 .ndo_get_stats64
= e1000e_get_stats64
,
6073 .ndo_set_rx_mode
= e1000e_set_rx_mode
,
6074 .ndo_set_mac_address
= e1000_set_mac
,
6075 .ndo_change_mtu
= e1000_change_mtu
,
6076 .ndo_do_ioctl
= e1000_ioctl
,
6077 .ndo_tx_timeout
= e1000_tx_timeout
,
6078 .ndo_validate_addr
= eth_validate_addr
,
6080 .ndo_vlan_rx_add_vid
= e1000_vlan_rx_add_vid
,
6081 .ndo_vlan_rx_kill_vid
= e1000_vlan_rx_kill_vid
,
6082 #ifdef CONFIG_NET_POLL_CONTROLLER
6083 .ndo_poll_controller
= e1000_netpoll
,
6085 .ndo_set_features
= e1000_set_features
,
6089 * e1000_probe - Device Initialization Routine
6090 * @pdev: PCI device information struct
6091 * @ent: entry in e1000_pci_tbl
6093 * Returns 0 on success, negative on failure
6095 * e1000_probe initializes an adapter identified by a pci_dev structure.
6096 * The OS initialization, configuring of the adapter private structure,
6097 * and a hardware reset occur.
6099 static int __devinit
e1000_probe(struct pci_dev
*pdev
,
6100 const struct pci_device_id
*ent
)
6102 struct net_device
*netdev
;
6103 struct e1000_adapter
*adapter
;
6104 struct e1000_hw
*hw
;
6105 const struct e1000_info
*ei
= e1000_info_tbl
[ent
->driver_data
];
6106 resource_size_t mmio_start
, mmio_len
;
6107 resource_size_t flash_start
, flash_len
;
6108 static int cards_found
;
6109 u16 aspm_disable_flag
= 0;
6110 int i
, err
, pci_using_dac
;
6111 u16 eeprom_data
= 0;
6112 u16 eeprom_apme_mask
= E1000_EEPROM_APME
;
6114 if (ei
->flags2
& FLAG2_DISABLE_ASPM_L0S
)
6115 aspm_disable_flag
= PCIE_LINK_STATE_L0S
;
6116 if (ei
->flags2
& FLAG2_DISABLE_ASPM_L1
)
6117 aspm_disable_flag
|= PCIE_LINK_STATE_L1
;
6118 if (aspm_disable_flag
)
6119 e1000e_disable_aspm(pdev
, aspm_disable_flag
);
6121 err
= pci_enable_device_mem(pdev
);
6126 err
= dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(64));
6128 err
= dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(64));
6132 err
= dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(32));
6134 err
= dma_set_coherent_mask(&pdev
->dev
,
6137 dev_err(&pdev
->dev
, "No usable DMA configuration, aborting\n");
6143 err
= pci_request_selected_regions_exclusive(pdev
,
6144 pci_select_bars(pdev
, IORESOURCE_MEM
),
6145 e1000e_driver_name
);
6149 /* AER (Advanced Error Reporting) hooks */
6150 pci_enable_pcie_error_reporting(pdev
);
6152 pci_set_master(pdev
);
6153 /* PCI config space info */
6154 err
= pci_save_state(pdev
);
6156 goto err_alloc_etherdev
;
6159 netdev
= alloc_etherdev(sizeof(struct e1000_adapter
));
6161 goto err_alloc_etherdev
;
6163 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
6165 netdev
->irq
= pdev
->irq
;
6167 pci_set_drvdata(pdev
, netdev
);
6168 adapter
= netdev_priv(netdev
);
6170 adapter
->netdev
= netdev
;
6171 adapter
->pdev
= pdev
;
6173 adapter
->pba
= ei
->pba
;
6174 adapter
->flags
= ei
->flags
;
6175 adapter
->flags2
= ei
->flags2
;
6176 adapter
->hw
.adapter
= adapter
;
6177 adapter
->hw
.mac
.type
= ei
->mac
;
6178 adapter
->max_hw_frame_size
= ei
->max_hw_frame_size
;
6179 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_MSG_ENABLE
);
6181 mmio_start
= pci_resource_start(pdev
, 0);
6182 mmio_len
= pci_resource_len(pdev
, 0);
6185 adapter
->hw
.hw_addr
= ioremap(mmio_start
, mmio_len
);
6186 if (!adapter
->hw
.hw_addr
)
6189 if ((adapter
->flags
& FLAG_HAS_FLASH
) &&
6190 (pci_resource_flags(pdev
, 1) & IORESOURCE_MEM
)) {
6191 flash_start
= pci_resource_start(pdev
, 1);
6192 flash_len
= pci_resource_len(pdev
, 1);
6193 adapter
->hw
.flash_address
= ioremap(flash_start
, flash_len
);
6194 if (!adapter
->hw
.flash_address
)
6198 /* construct the net_device struct */
6199 netdev
->netdev_ops
= &e1000e_netdev_ops
;
6200 e1000e_set_ethtool_ops(netdev
);
6201 netdev
->watchdog_timeo
= 5 * HZ
;
6202 netif_napi_add(netdev
, &adapter
->napi
, e1000e_poll
, 64);
6203 strlcpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
));
6205 netdev
->mem_start
= mmio_start
;
6206 netdev
->mem_end
= mmio_start
+ mmio_len
;
6208 adapter
->bd_number
= cards_found
++;
6210 e1000e_check_options(adapter
);
6212 /* setup adapter struct */
6213 err
= e1000_sw_init(adapter
);
6217 memcpy(&hw
->mac
.ops
, ei
->mac_ops
, sizeof(hw
->mac
.ops
));
6218 memcpy(&hw
->nvm
.ops
, ei
->nvm_ops
, sizeof(hw
->nvm
.ops
));
6219 memcpy(&hw
->phy
.ops
, ei
->phy_ops
, sizeof(hw
->phy
.ops
));
6221 err
= ei
->get_variants(adapter
);
6225 if ((adapter
->flags
& FLAG_IS_ICH
) &&
6226 (adapter
->flags
& FLAG_READ_ONLY_NVM
))
6227 e1000e_write_protect_nvm_ich8lan(&adapter
->hw
);
6229 hw
->mac
.ops
.get_bus_info(&adapter
->hw
);
6231 adapter
->hw
.phy
.autoneg_wait_to_complete
= 0;
6233 /* Copper options */
6234 if (adapter
->hw
.phy
.media_type
== e1000_media_type_copper
) {
6235 adapter
->hw
.phy
.mdix
= AUTO_ALL_MODES
;
6236 adapter
->hw
.phy
.disable_polarity_correction
= 0;
6237 adapter
->hw
.phy
.ms_type
= e1000_ms_hw_default
;
6240 if (hw
->phy
.ops
.check_reset_block(hw
))
6241 e_info("PHY reset is blocked due to SOL/IDER session.\n");
6243 /* Set initial default active device features */
6244 netdev
->features
= (NETIF_F_SG
|
6245 NETIF_F_HW_VLAN_RX
|
6246 NETIF_F_HW_VLAN_TX
|
6253 /* Set user-changeable features (subset of all device features) */
6254 netdev
->hw_features
= netdev
->features
;
6255 netdev
->hw_features
|= NETIF_F_RXFCS
;
6256 netdev
->priv_flags
|= IFF_SUPP_NOFCS
;
6257 netdev
->hw_features
|= NETIF_F_RXALL
;
6259 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
)
6260 netdev
->features
|= NETIF_F_HW_VLAN_FILTER
;
6262 netdev
->vlan_features
|= (NETIF_F_SG
|
6267 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
6269 if (pci_using_dac
) {
6270 netdev
->features
|= NETIF_F_HIGHDMA
;
6271 netdev
->vlan_features
|= NETIF_F_HIGHDMA
;
6274 if (e1000e_enable_mng_pass_thru(&adapter
->hw
))
6275 adapter
->flags
|= FLAG_MNG_PT_ENABLED
;
6278 * before reading the NVM, reset the controller to
6279 * put the device in a known good starting state
6281 adapter
->hw
.mac
.ops
.reset_hw(&adapter
->hw
);
6284 * systems with ASPM and others may see the checksum fail on the first
6285 * attempt. Let's give it a few tries
6288 if (e1000_validate_nvm_checksum(&adapter
->hw
) >= 0)
6291 e_err("The NVM Checksum Is Not Valid\n");
6297 e1000_eeprom_checks(adapter
);
6299 /* copy the MAC address */
6300 if (e1000e_read_mac_addr(&adapter
->hw
))
6301 e_err("NVM Read Error while reading MAC address\n");
6303 memcpy(netdev
->dev_addr
, adapter
->hw
.mac
.addr
, netdev
->addr_len
);
6304 memcpy(netdev
->perm_addr
, adapter
->hw
.mac
.addr
, netdev
->addr_len
);
6306 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
6307 e_err("Invalid MAC Address: %pM\n", netdev
->perm_addr
);
6312 init_timer(&adapter
->watchdog_timer
);
6313 adapter
->watchdog_timer
.function
= e1000_watchdog
;
6314 adapter
->watchdog_timer
.data
= (unsigned long) adapter
;
6316 init_timer(&adapter
->phy_info_timer
);
6317 adapter
->phy_info_timer
.function
= e1000_update_phy_info
;
6318 adapter
->phy_info_timer
.data
= (unsigned long) adapter
;
6320 INIT_WORK(&adapter
->reset_task
, e1000_reset_task
);
6321 INIT_WORK(&adapter
->watchdog_task
, e1000_watchdog_task
);
6322 INIT_WORK(&adapter
->downshift_task
, e1000e_downshift_workaround
);
6323 INIT_WORK(&adapter
->update_phy_task
, e1000e_update_phy_task
);
6324 INIT_WORK(&adapter
->print_hang_task
, e1000_print_hw_hang
);
6326 /* Initialize link parameters. User can change them with ethtool */
6327 adapter
->hw
.mac
.autoneg
= 1;
6328 adapter
->fc_autoneg
= true;
6329 adapter
->hw
.fc
.requested_mode
= e1000_fc_default
;
6330 adapter
->hw
.fc
.current_mode
= e1000_fc_default
;
6331 adapter
->hw
.phy
.autoneg_advertised
= 0x2f;
6333 /* ring size defaults */
6334 adapter
->rx_ring
->count
= 256;
6335 adapter
->tx_ring
->count
= 256;
6338 * Initial Wake on LAN setting - If APM wake is enabled in
6339 * the EEPROM, enable the ACPI Magic Packet filter
6341 if (adapter
->flags
& FLAG_APME_IN_WUC
) {
6342 /* APME bit in EEPROM is mapped to WUC.APME */
6343 eeprom_data
= er32(WUC
);
6344 eeprom_apme_mask
= E1000_WUC_APME
;
6345 if ((hw
->mac
.type
> e1000_ich10lan
) &&
6346 (eeprom_data
& E1000_WUC_PHY_WAKE
))
6347 adapter
->flags2
|= FLAG2_HAS_PHY_WAKEUP
;
6348 } else if (adapter
->flags
& FLAG_APME_IN_CTRL3
) {
6349 if (adapter
->flags
& FLAG_APME_CHECK_PORT_B
&&
6350 (adapter
->hw
.bus
.func
== 1))
6351 e1000_read_nvm(&adapter
->hw
, NVM_INIT_CONTROL3_PORT_B
,
6354 e1000_read_nvm(&adapter
->hw
, NVM_INIT_CONTROL3_PORT_A
,
6358 /* fetch WoL from EEPROM */
6359 if (eeprom_data
& eeprom_apme_mask
)
6360 adapter
->eeprom_wol
|= E1000_WUFC_MAG
;
6363 * now that we have the eeprom settings, apply the special cases
6364 * where the eeprom may be wrong or the board simply won't support
6365 * wake on lan on a particular port
6367 if (!(adapter
->flags
& FLAG_HAS_WOL
))
6368 adapter
->eeprom_wol
= 0;
6370 /* initialize the wol settings based on the eeprom settings */
6371 adapter
->wol
= adapter
->eeprom_wol
;
6372 device_set_wakeup_enable(&adapter
->pdev
->dev
, adapter
->wol
);
6374 /* save off EEPROM version number */
6375 e1000_read_nvm(&adapter
->hw
, 5, 1, &adapter
->eeprom_vers
);
6377 /* reset the hardware with the new settings */
6378 e1000e_reset(adapter
);
6381 * If the controller has AMT, do not set DRV_LOAD until the interface
6382 * is up. For all other cases, let the f/w know that the h/w is now
6383 * under the control of the driver.
6385 if (!(adapter
->flags
& FLAG_HAS_AMT
))
6386 e1000e_get_hw_control(adapter
);
6388 strlcpy(netdev
->name
, "eth%d", sizeof(netdev
->name
));
6389 err
= register_netdev(netdev
);
6393 /* carrier off reporting is important to ethtool even BEFORE open */
6394 netif_carrier_off(netdev
);
6396 e1000_print_device_info(adapter
);
6398 if (pci_dev_run_wake(pdev
))
6399 pm_runtime_put_noidle(&pdev
->dev
);
6404 if (!(adapter
->flags
& FLAG_HAS_AMT
))
6405 e1000e_release_hw_control(adapter
);
6407 if (!hw
->phy
.ops
.check_reset_block(hw
))
6408 e1000_phy_hw_reset(&adapter
->hw
);
6410 kfree(adapter
->tx_ring
);
6411 kfree(adapter
->rx_ring
);
6413 if (adapter
->hw
.flash_address
)
6414 iounmap(adapter
->hw
.flash_address
);
6415 e1000e_reset_interrupt_capability(adapter
);
6417 iounmap(adapter
->hw
.hw_addr
);
6419 free_netdev(netdev
);
6421 pci_release_selected_regions(pdev
,
6422 pci_select_bars(pdev
, IORESOURCE_MEM
));
6425 pci_disable_device(pdev
);
6430 * e1000_remove - Device Removal Routine
6431 * @pdev: PCI device information struct
6433 * e1000_remove is called by the PCI subsystem to alert the driver
6434 * that it should release a PCI device. The could be caused by a
6435 * Hot-Plug event, or because the driver is going to be removed from
6438 static void __devexit
e1000_remove(struct pci_dev
*pdev
)
6440 struct net_device
*netdev
= pci_get_drvdata(pdev
);
6441 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
6442 bool down
= test_bit(__E1000_DOWN
, &adapter
->state
);
6445 * The timers may be rescheduled, so explicitly disable them
6446 * from being rescheduled.
6449 set_bit(__E1000_DOWN
, &adapter
->state
);
6450 del_timer_sync(&adapter
->watchdog_timer
);
6451 del_timer_sync(&adapter
->phy_info_timer
);
6453 cancel_work_sync(&adapter
->reset_task
);
6454 cancel_work_sync(&adapter
->watchdog_task
);
6455 cancel_work_sync(&adapter
->downshift_task
);
6456 cancel_work_sync(&adapter
->update_phy_task
);
6457 cancel_work_sync(&adapter
->print_hang_task
);
6459 if (!(netdev
->flags
& IFF_UP
))
6460 e1000_power_down_phy(adapter
);
6462 /* Don't lie to e1000_close() down the road. */
6464 clear_bit(__E1000_DOWN
, &adapter
->state
);
6465 unregister_netdev(netdev
);
6467 if (pci_dev_run_wake(pdev
))
6468 pm_runtime_get_noresume(&pdev
->dev
);
6471 * Release control of h/w to f/w. If f/w is AMT enabled, this
6472 * would have already happened in close and is redundant.
6474 e1000e_release_hw_control(adapter
);
6476 e1000e_reset_interrupt_capability(adapter
);
6477 kfree(adapter
->tx_ring
);
6478 kfree(adapter
->rx_ring
);
6480 iounmap(adapter
->hw
.hw_addr
);
6481 if (adapter
->hw
.flash_address
)
6482 iounmap(adapter
->hw
.flash_address
);
6483 pci_release_selected_regions(pdev
,
6484 pci_select_bars(pdev
, IORESOURCE_MEM
));
6486 free_netdev(netdev
);
6489 pci_disable_pcie_error_reporting(pdev
);
6491 pci_disable_device(pdev
);
6494 /* PCI Error Recovery (ERS) */
6495 static struct pci_error_handlers e1000_err_handler
= {
6496 .error_detected
= e1000_io_error_detected
,
6497 .slot_reset
= e1000_io_slot_reset
,
6498 .resume
= e1000_io_resume
,
6501 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl
) = {
6502 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_COPPER
), board_82571
},
6503 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_FIBER
), board_82571
},
6504 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_QUAD_COPPER
), board_82571
},
6505 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_QUAD_COPPER_LP
), board_82571
},
6506 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_QUAD_FIBER
), board_82571
},
6507 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_SERDES
), board_82571
},
6508 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_SERDES_DUAL
), board_82571
},
6509 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_SERDES_QUAD
), board_82571
},
6510 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571PT_QUAD_COPPER
), board_82571
},
6512 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82572EI
), board_82572
},
6513 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82572EI_COPPER
), board_82572
},
6514 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82572EI_FIBER
), board_82572
},
6515 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82572EI_SERDES
), board_82572
},
6517 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82573E
), board_82573
},
6518 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82573E_IAMT
), board_82573
},
6519 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82573L
), board_82573
},
6521 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82574L
), board_82574
},
6522 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82574LA
), board_82574
},
6523 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82583V
), board_82583
},
6525 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_80003ES2LAN_COPPER_DPT
),
6526 board_80003es2lan
},
6527 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_80003ES2LAN_COPPER_SPT
),
6528 board_80003es2lan
},
6529 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_80003ES2LAN_SERDES_DPT
),
6530 board_80003es2lan
},
6531 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_80003ES2LAN_SERDES_SPT
),
6532 board_80003es2lan
},
6534 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IFE
), board_ich8lan
},
6535 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IFE_G
), board_ich8lan
},
6536 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IFE_GT
), board_ich8lan
},
6537 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IGP_AMT
), board_ich8lan
},
6538 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IGP_C
), board_ich8lan
},
6539 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IGP_M
), board_ich8lan
},
6540 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IGP_M_AMT
), board_ich8lan
},
6541 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_82567V_3
), board_ich8lan
},
6543 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IFE
), board_ich9lan
},
6544 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IFE_G
), board_ich9lan
},
6545 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IFE_GT
), board_ich9lan
},
6546 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IGP_AMT
), board_ich9lan
},
6547 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IGP_C
), board_ich9lan
},
6548 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_BM
), board_ich9lan
},
6549 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IGP_M
), board_ich9lan
},
6550 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IGP_M_AMT
), board_ich9lan
},
6551 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IGP_M_V
), board_ich9lan
},
6553 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_R_BM_LM
), board_ich9lan
},
6554 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_R_BM_LF
), board_ich9lan
},
6555 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_R_BM_V
), board_ich9lan
},
6557 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_D_BM_LM
), board_ich10lan
},
6558 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_D_BM_LF
), board_ich10lan
},
6559 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_D_BM_V
), board_ich10lan
},
6561 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH_M_HV_LM
), board_pchlan
},
6562 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH_M_HV_LC
), board_pchlan
},
6563 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH_D_HV_DM
), board_pchlan
},
6564 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH_D_HV_DC
), board_pchlan
},
6566 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH2_LV_LM
), board_pch2lan
},
6567 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH2_LV_V
), board_pch2lan
},
6569 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH_LPT_I217_LM
), board_pch_lpt
},
6570 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH_LPT_I217_V
), board_pch_lpt
},
6572 { 0, 0, 0, 0, 0, 0, 0 } /* terminate list */
6574 MODULE_DEVICE_TABLE(pci
, e1000_pci_tbl
);
6577 static const struct dev_pm_ops e1000_pm_ops
= {
6578 SET_SYSTEM_SLEEP_PM_OPS(e1000_suspend
, e1000_resume
)
6579 SET_RUNTIME_PM_OPS(e1000_runtime_suspend
,
6580 e1000_runtime_resume
, e1000_idle
)
6584 /* PCI Device API Driver */
6585 static struct pci_driver e1000_driver
= {
6586 .name
= e1000e_driver_name
,
6587 .id_table
= e1000_pci_tbl
,
6588 .probe
= e1000_probe
,
6589 .remove
= __devexit_p(e1000_remove
),
6592 .pm
= &e1000_pm_ops
,
6595 .shutdown
= e1000_shutdown
,
6596 .err_handler
= &e1000_err_handler
6600 * e1000_init_module - Driver Registration Routine
6602 * e1000_init_module is the first routine called when the driver is
6603 * loaded. All it does is register with the PCI subsystem.
6605 static int __init
e1000_init_module(void)
6608 pr_info("Intel(R) PRO/1000 Network Driver - %s\n",
6609 e1000e_driver_version
);
6610 pr_info("Copyright(c) 1999 - 2012 Intel Corporation.\n");
6611 ret
= pci_register_driver(&e1000_driver
);
6615 module_init(e1000_init_module
);
6618 * e1000_exit_module - Driver Exit Cleanup Routine
6620 * e1000_exit_module is called just before the driver is removed
6623 static void __exit
e1000_exit_module(void)
6625 pci_unregister_driver(&e1000_driver
);
6627 module_exit(e1000_exit_module
);
6630 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
6631 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
6632 MODULE_LICENSE("GPL");
6633 MODULE_VERSION(DRV_VERSION
);