1 /*******************************************************************************
3 Intel(R) Gigabit Ethernet Linux driver
4 Copyright(c) 2007 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 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *******************************************************************************/
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/init.h>
31 #include <linux/vmalloc.h>
32 #include <linux/pagemap.h>
33 #include <linux/netdevice.h>
34 #include <linux/ipv6.h>
35 #include <net/checksum.h>
36 #include <net/ip6_checksum.h>
37 #include <linux/mii.h>
38 #include <linux/ethtool.h>
39 #include <linux/if_vlan.h>
40 #include <linux/pci.h>
41 #include <linux/delay.h>
42 #include <linux/interrupt.h>
43 #include <linux/if_ether.h>
45 #include <linux/dca.h>
49 #define DRV_VERSION "1.2.45-k2"
50 char igb_driver_name
[] = "igb";
51 char igb_driver_version
[] = DRV_VERSION
;
52 static const char igb_driver_string
[] =
53 "Intel(R) Gigabit Ethernet Network Driver";
54 static const char igb_copyright
[] = "Copyright (c) 2008 Intel Corporation.";
56 static const struct e1000_info
*igb_info_tbl
[] = {
57 [board_82575
] = &e1000_82575_info
,
60 static struct pci_device_id igb_pci_tbl
[] = {
61 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82576
), board_82575
},
62 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82576_FIBER
), board_82575
},
63 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82576_SERDES
), board_82575
},
64 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82576_QUAD_COPPER
), board_82575
},
65 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82575EB_COPPER
), board_82575
},
66 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82575EB_FIBER_SERDES
), board_82575
},
67 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82575GB_QUAD_COPPER
), board_82575
},
68 /* required last entry */
72 MODULE_DEVICE_TABLE(pci
, igb_pci_tbl
);
74 void igb_reset(struct igb_adapter
*);
75 static int igb_setup_all_tx_resources(struct igb_adapter
*);
76 static int igb_setup_all_rx_resources(struct igb_adapter
*);
77 static void igb_free_all_tx_resources(struct igb_adapter
*);
78 static void igb_free_all_rx_resources(struct igb_adapter
*);
79 static void igb_free_tx_resources(struct igb_ring
*);
80 static void igb_free_rx_resources(struct igb_ring
*);
81 void igb_update_stats(struct igb_adapter
*);
82 static int igb_probe(struct pci_dev
*, const struct pci_device_id
*);
83 static void __devexit
igb_remove(struct pci_dev
*pdev
);
84 static int igb_sw_init(struct igb_adapter
*);
85 static int igb_open(struct net_device
*);
86 static int igb_close(struct net_device
*);
87 static void igb_configure_tx(struct igb_adapter
*);
88 static void igb_configure_rx(struct igb_adapter
*);
89 static void igb_setup_rctl(struct igb_adapter
*);
90 static void igb_clean_all_tx_rings(struct igb_adapter
*);
91 static void igb_clean_all_rx_rings(struct igb_adapter
*);
92 static void igb_clean_tx_ring(struct igb_ring
*);
93 static void igb_clean_rx_ring(struct igb_ring
*);
94 static void igb_set_multi(struct net_device
*);
95 static void igb_update_phy_info(unsigned long);
96 static void igb_watchdog(unsigned long);
97 static void igb_watchdog_task(struct work_struct
*);
98 static int igb_xmit_frame_ring_adv(struct sk_buff
*, struct net_device
*,
100 static int igb_xmit_frame_adv(struct sk_buff
*skb
, struct net_device
*);
101 static struct net_device_stats
*igb_get_stats(struct net_device
*);
102 static int igb_change_mtu(struct net_device
*, int);
103 static int igb_set_mac(struct net_device
*, void *);
104 static irqreturn_t
igb_intr(int irq
, void *);
105 static irqreturn_t
igb_intr_msi(int irq
, void *);
106 static irqreturn_t
igb_msix_other(int irq
, void *);
107 static irqreturn_t
igb_msix_rx(int irq
, void *);
108 static irqreturn_t
igb_msix_tx(int irq
, void *);
109 static int igb_clean_rx_ring_msix(struct napi_struct
*, int);
111 static void igb_update_rx_dca(struct igb_ring
*);
112 static void igb_update_tx_dca(struct igb_ring
*);
113 static void igb_setup_dca(struct igb_adapter
*);
114 #endif /* CONFIG_DCA */
115 static bool igb_clean_tx_irq(struct igb_ring
*);
116 static int igb_poll(struct napi_struct
*, int);
117 static bool igb_clean_rx_irq_adv(struct igb_ring
*, int *, int);
118 static void igb_alloc_rx_buffers_adv(struct igb_ring
*, int);
119 #ifdef CONFIG_IGB_LRO
120 static int igb_get_skb_hdr(struct sk_buff
*skb
, void **, void **, u64
*, void *);
122 static int igb_ioctl(struct net_device
*, struct ifreq
*, int cmd
);
123 static void igb_tx_timeout(struct net_device
*);
124 static void igb_reset_task(struct work_struct
*);
125 static void igb_vlan_rx_register(struct net_device
*, struct vlan_group
*);
126 static void igb_vlan_rx_add_vid(struct net_device
*, u16
);
127 static void igb_vlan_rx_kill_vid(struct net_device
*, u16
);
128 static void igb_restore_vlan(struct igb_adapter
*);
130 static int igb_suspend(struct pci_dev
*, pm_message_t
);
132 static int igb_resume(struct pci_dev
*);
134 static void igb_shutdown(struct pci_dev
*);
136 static int igb_notify_dca(struct notifier_block
*, unsigned long, void *);
137 static struct notifier_block dca_notifier
= {
138 .notifier_call
= igb_notify_dca
,
144 #ifdef CONFIG_NET_POLL_CONTROLLER
145 /* for netdump / net console */
146 static void igb_netpoll(struct net_device
*);
149 static pci_ers_result_t
igb_io_error_detected(struct pci_dev
*,
150 pci_channel_state_t
);
151 static pci_ers_result_t
igb_io_slot_reset(struct pci_dev
*);
152 static void igb_io_resume(struct pci_dev
*);
154 static struct pci_error_handlers igb_err_handler
= {
155 .error_detected
= igb_io_error_detected
,
156 .slot_reset
= igb_io_slot_reset
,
157 .resume
= igb_io_resume
,
161 static struct pci_driver igb_driver
= {
162 .name
= igb_driver_name
,
163 .id_table
= igb_pci_tbl
,
165 .remove
= __devexit_p(igb_remove
),
167 /* Power Managment Hooks */
168 .suspend
= igb_suspend
,
169 .resume
= igb_resume
,
171 .shutdown
= igb_shutdown
,
172 .err_handler
= &igb_err_handler
175 static int global_quad_port_a
; /* global quad port a indication */
177 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
178 MODULE_DESCRIPTION("Intel(R) Gigabit Ethernet Network Driver");
179 MODULE_LICENSE("GPL");
180 MODULE_VERSION(DRV_VERSION
);
184 * igb_get_hw_dev_name - return device name string
185 * used by hardware layer to print debugging information
187 char *igb_get_hw_dev_name(struct e1000_hw
*hw
)
189 struct igb_adapter
*adapter
= hw
->back
;
190 return adapter
->netdev
->name
;
195 * igb_init_module - Driver Registration Routine
197 * igb_init_module is the first routine called when the driver is
198 * loaded. All it does is register with the PCI subsystem.
200 static int __init
igb_init_module(void)
203 printk(KERN_INFO
"%s - version %s\n",
204 igb_driver_string
, igb_driver_version
);
206 printk(KERN_INFO
"%s\n", igb_copyright
);
208 global_quad_port_a
= 0;
210 ret
= pci_register_driver(&igb_driver
);
212 dca_register_notify(&dca_notifier
);
217 module_init(igb_init_module
);
220 * igb_exit_module - Driver Exit Cleanup Routine
222 * igb_exit_module is called just before the driver is removed
225 static void __exit
igb_exit_module(void)
228 dca_unregister_notify(&dca_notifier
);
230 pci_unregister_driver(&igb_driver
);
233 module_exit(igb_exit_module
);
236 * igb_alloc_queues - Allocate memory for all rings
237 * @adapter: board private structure to initialize
239 * We allocate one ring per queue at run-time since we don't know the
240 * number of queues at compile-time.
242 static int igb_alloc_queues(struct igb_adapter
*adapter
)
246 adapter
->tx_ring
= kcalloc(adapter
->num_tx_queues
,
247 sizeof(struct igb_ring
), GFP_KERNEL
);
248 if (!adapter
->tx_ring
)
251 adapter
->rx_ring
= kcalloc(adapter
->num_rx_queues
,
252 sizeof(struct igb_ring
), GFP_KERNEL
);
253 if (!adapter
->rx_ring
) {
254 kfree(adapter
->tx_ring
);
258 adapter
->rx_ring
->buddy
= adapter
->tx_ring
;
260 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
261 struct igb_ring
*ring
= &(adapter
->tx_ring
[i
]);
262 ring
->adapter
= adapter
;
263 ring
->queue_index
= i
;
265 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
266 struct igb_ring
*ring
= &(adapter
->rx_ring
[i
]);
267 ring
->adapter
= adapter
;
268 ring
->queue_index
= i
;
269 ring
->itr_register
= E1000_ITR
;
271 /* set a default napi handler for each rx_ring */
272 netif_napi_add(adapter
->netdev
, &ring
->napi
, igb_poll
, 64);
277 static void igb_free_queues(struct igb_adapter
*adapter
)
281 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
282 netif_napi_del(&adapter
->rx_ring
[i
].napi
);
284 kfree(adapter
->tx_ring
);
285 kfree(adapter
->rx_ring
);
288 #define IGB_N0_QUEUE -1
289 static void igb_assign_vector(struct igb_adapter
*adapter
, int rx_queue
,
290 int tx_queue
, int msix_vector
)
293 struct e1000_hw
*hw
= &adapter
->hw
;
296 switch (hw
->mac
.type
) {
298 /* The 82575 assigns vectors using a bitmask, which matches the
299 bitmask for the EICR/EIMS/EIMC registers. To assign one
300 or more queues to a vector, we write the appropriate bits
301 into the MSIXBM register for that vector. */
302 if (rx_queue
> IGB_N0_QUEUE
) {
303 msixbm
= E1000_EICR_RX_QUEUE0
<< rx_queue
;
304 adapter
->rx_ring
[rx_queue
].eims_value
= msixbm
;
306 if (tx_queue
> IGB_N0_QUEUE
) {
307 msixbm
|= E1000_EICR_TX_QUEUE0
<< tx_queue
;
308 adapter
->tx_ring
[tx_queue
].eims_value
=
309 E1000_EICR_TX_QUEUE0
<< tx_queue
;
311 array_wr32(E1000_MSIXBM(0), msix_vector
, msixbm
);
314 /* The 82576 uses a table-based method for assigning vectors.
315 Each queue has a single entry in the table to which we write
316 a vector number along with a "valid" bit. Sadly, the layout
317 of the table is somewhat counterintuitive. */
318 if (rx_queue
> IGB_N0_QUEUE
) {
319 index
= (rx_queue
& 0x7);
320 ivar
= array_rd32(E1000_IVAR0
, index
);
322 /* vector goes into low byte of register */
323 ivar
= ivar
& 0xFFFFFF00;
324 ivar
|= msix_vector
| E1000_IVAR_VALID
;
326 /* vector goes into third byte of register */
327 ivar
= ivar
& 0xFF00FFFF;
328 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 16;
330 adapter
->rx_ring
[rx_queue
].eims_value
= 1 << msix_vector
;
331 array_wr32(E1000_IVAR0
, index
, ivar
);
333 if (tx_queue
> IGB_N0_QUEUE
) {
334 index
= (tx_queue
& 0x7);
335 ivar
= array_rd32(E1000_IVAR0
, index
);
337 /* vector goes into second byte of register */
338 ivar
= ivar
& 0xFFFF00FF;
339 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 8;
341 /* vector goes into high byte of register */
342 ivar
= ivar
& 0x00FFFFFF;
343 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 24;
345 adapter
->tx_ring
[tx_queue
].eims_value
= 1 << msix_vector
;
346 array_wr32(E1000_IVAR0
, index
, ivar
);
356 * igb_configure_msix - Configure MSI-X hardware
358 * igb_configure_msix sets up the hardware to properly
359 * generate MSI-X interrupts.
361 static void igb_configure_msix(struct igb_adapter
*adapter
)
365 struct e1000_hw
*hw
= &adapter
->hw
;
367 adapter
->eims_enable_mask
= 0;
368 if (hw
->mac
.type
== e1000_82576
)
369 /* Turn on MSI-X capability first, or our settings
370 * won't stick. And it will take days to debug. */
371 wr32(E1000_GPIE
, E1000_GPIE_MSIX_MODE
|
372 E1000_GPIE_PBA
| E1000_GPIE_EIAME
|
375 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
376 struct igb_ring
*tx_ring
= &adapter
->tx_ring
[i
];
377 igb_assign_vector(adapter
, IGB_N0_QUEUE
, i
, vector
++);
378 adapter
->eims_enable_mask
|= tx_ring
->eims_value
;
379 if (tx_ring
->itr_val
)
380 writel(tx_ring
->itr_val
,
381 hw
->hw_addr
+ tx_ring
->itr_register
);
383 writel(1, hw
->hw_addr
+ tx_ring
->itr_register
);
386 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
387 struct igb_ring
*rx_ring
= &adapter
->rx_ring
[i
];
388 rx_ring
->buddy
= NULL
;
389 igb_assign_vector(adapter
, i
, IGB_N0_QUEUE
, vector
++);
390 adapter
->eims_enable_mask
|= rx_ring
->eims_value
;
391 if (rx_ring
->itr_val
)
392 writel(rx_ring
->itr_val
,
393 hw
->hw_addr
+ rx_ring
->itr_register
);
395 writel(1, hw
->hw_addr
+ rx_ring
->itr_register
);
399 /* set vector for other causes, i.e. link changes */
400 switch (hw
->mac
.type
) {
402 array_wr32(E1000_MSIXBM(0), vector
++,
405 tmp
= rd32(E1000_CTRL_EXT
);
406 /* enable MSI-X PBA support*/
407 tmp
|= E1000_CTRL_EXT_PBA_CLR
;
409 /* Auto-Mask interrupts upon ICR read. */
410 tmp
|= E1000_CTRL_EXT_EIAME
;
411 tmp
|= E1000_CTRL_EXT_IRCA
;
413 wr32(E1000_CTRL_EXT
, tmp
);
414 adapter
->eims_enable_mask
|= E1000_EIMS_OTHER
;
415 adapter
->eims_other
= E1000_EIMS_OTHER
;
420 tmp
= (vector
++ | E1000_IVAR_VALID
) << 8;
421 wr32(E1000_IVAR_MISC
, tmp
);
423 adapter
->eims_enable_mask
= (1 << (vector
)) - 1;
424 adapter
->eims_other
= 1 << (vector
- 1);
427 /* do nothing, since nothing else supports MSI-X */
429 } /* switch (hw->mac.type) */
434 * igb_request_msix - Initialize MSI-X interrupts
436 * igb_request_msix allocates MSI-X vectors and requests interrupts from the
439 static int igb_request_msix(struct igb_adapter
*adapter
)
441 struct net_device
*netdev
= adapter
->netdev
;
442 int i
, err
= 0, vector
= 0;
446 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
447 struct igb_ring
*ring
= &(adapter
->tx_ring
[i
]);
448 sprintf(ring
->name
, "%s-tx%d", netdev
->name
, i
);
449 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
450 &igb_msix_tx
, 0, ring
->name
,
451 &(adapter
->tx_ring
[i
]));
454 ring
->itr_register
= E1000_EITR(0) + (vector
<< 2);
455 ring
->itr_val
= 976; /* ~4000 ints/sec */
458 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
459 struct igb_ring
*ring
= &(adapter
->rx_ring
[i
]);
460 if (strlen(netdev
->name
) < (IFNAMSIZ
- 5))
461 sprintf(ring
->name
, "%s-rx%d", netdev
->name
, i
);
463 memcpy(ring
->name
, netdev
->name
, IFNAMSIZ
);
464 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
465 &igb_msix_rx
, 0, ring
->name
,
466 &(adapter
->rx_ring
[i
]));
469 ring
->itr_register
= E1000_EITR(0) + (vector
<< 2);
470 ring
->itr_val
= adapter
->itr
;
471 /* overwrite the poll routine for MSIX, we've already done
473 ring
->napi
.poll
= &igb_clean_rx_ring_msix
;
477 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
478 &igb_msix_other
, 0, netdev
->name
, netdev
);
482 igb_configure_msix(adapter
);
488 static void igb_reset_interrupt_capability(struct igb_adapter
*adapter
)
490 if (adapter
->msix_entries
) {
491 pci_disable_msix(adapter
->pdev
);
492 kfree(adapter
->msix_entries
);
493 adapter
->msix_entries
= NULL
;
494 } else if (adapter
->flags
& IGB_FLAG_HAS_MSI
)
495 pci_disable_msi(adapter
->pdev
);
501 * igb_set_interrupt_capability - set MSI or MSI-X if supported
503 * Attempt to configure interrupts using the best available
504 * capabilities of the hardware and kernel.
506 static void igb_set_interrupt_capability(struct igb_adapter
*adapter
)
511 numvecs
= adapter
->num_tx_queues
+ adapter
->num_rx_queues
+ 1;
512 adapter
->msix_entries
= kcalloc(numvecs
, sizeof(struct msix_entry
),
514 if (!adapter
->msix_entries
)
517 for (i
= 0; i
< numvecs
; i
++)
518 adapter
->msix_entries
[i
].entry
= i
;
520 err
= pci_enable_msix(adapter
->pdev
,
521 adapter
->msix_entries
,
526 igb_reset_interrupt_capability(adapter
);
528 /* If we can't do MSI-X, try MSI */
530 adapter
->num_rx_queues
= 1;
531 adapter
->num_tx_queues
= 1;
532 if (!pci_enable_msi(adapter
->pdev
))
533 adapter
->flags
|= IGB_FLAG_HAS_MSI
;
535 /* Notify the stack of the (possibly) reduced Tx Queue count. */
536 adapter
->netdev
->real_num_tx_queues
= adapter
->num_tx_queues
;
541 * igb_request_irq - initialize interrupts
543 * Attempts to configure interrupts using the best available
544 * capabilities of the hardware and kernel.
546 static int igb_request_irq(struct igb_adapter
*adapter
)
548 struct net_device
*netdev
= adapter
->netdev
;
549 struct e1000_hw
*hw
= &adapter
->hw
;
552 if (adapter
->msix_entries
) {
553 err
= igb_request_msix(adapter
);
556 /* fall back to MSI */
557 igb_reset_interrupt_capability(adapter
);
558 if (!pci_enable_msi(adapter
->pdev
))
559 adapter
->flags
|= IGB_FLAG_HAS_MSI
;
560 igb_free_all_tx_resources(adapter
);
561 igb_free_all_rx_resources(adapter
);
562 adapter
->num_rx_queues
= 1;
563 igb_alloc_queues(adapter
);
565 switch (hw
->mac
.type
) {
567 wr32(E1000_MSIXBM(0),
568 (E1000_EICR_RX_QUEUE0
| E1000_EIMS_OTHER
));
571 wr32(E1000_IVAR0
, E1000_IVAR_VALID
);
578 if (adapter
->flags
& IGB_FLAG_HAS_MSI
) {
579 err
= request_irq(adapter
->pdev
->irq
, &igb_intr_msi
, 0,
580 netdev
->name
, netdev
);
583 /* fall back to legacy interrupts */
584 igb_reset_interrupt_capability(adapter
);
585 adapter
->flags
&= ~IGB_FLAG_HAS_MSI
;
588 err
= request_irq(adapter
->pdev
->irq
, &igb_intr
, IRQF_SHARED
,
589 netdev
->name
, netdev
);
592 dev_err(&adapter
->pdev
->dev
, "Error %d getting interrupt\n",
599 static void igb_free_irq(struct igb_adapter
*adapter
)
601 struct net_device
*netdev
= adapter
->netdev
;
603 if (adapter
->msix_entries
) {
606 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
607 free_irq(adapter
->msix_entries
[vector
++].vector
,
608 &(adapter
->tx_ring
[i
]));
609 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
610 free_irq(adapter
->msix_entries
[vector
++].vector
,
611 &(adapter
->rx_ring
[i
]));
613 free_irq(adapter
->msix_entries
[vector
++].vector
, netdev
);
617 free_irq(adapter
->pdev
->irq
, netdev
);
621 * igb_irq_disable - Mask off interrupt generation on the NIC
622 * @adapter: board private structure
624 static void igb_irq_disable(struct igb_adapter
*adapter
)
626 struct e1000_hw
*hw
= &adapter
->hw
;
628 if (adapter
->msix_entries
) {
630 wr32(E1000_EIMC
, ~0);
637 synchronize_irq(adapter
->pdev
->irq
);
641 * igb_irq_enable - Enable default interrupt generation settings
642 * @adapter: board private structure
644 static void igb_irq_enable(struct igb_adapter
*adapter
)
646 struct e1000_hw
*hw
= &adapter
->hw
;
648 if (adapter
->msix_entries
) {
649 wr32(E1000_EIAC
, adapter
->eims_enable_mask
);
650 wr32(E1000_EIAM
, adapter
->eims_enable_mask
);
651 wr32(E1000_EIMS
, adapter
->eims_enable_mask
);
652 wr32(E1000_IMS
, E1000_IMS_LSC
);
654 wr32(E1000_IMS
, IMS_ENABLE_MASK
);
655 wr32(E1000_IAM
, IMS_ENABLE_MASK
);
659 static void igb_update_mng_vlan(struct igb_adapter
*adapter
)
661 struct net_device
*netdev
= adapter
->netdev
;
662 u16 vid
= adapter
->hw
.mng_cookie
.vlan_id
;
663 u16 old_vid
= adapter
->mng_vlan_id
;
664 if (adapter
->vlgrp
) {
665 if (!vlan_group_get_device(adapter
->vlgrp
, vid
)) {
666 if (adapter
->hw
.mng_cookie
.status
&
667 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) {
668 igb_vlan_rx_add_vid(netdev
, vid
);
669 adapter
->mng_vlan_id
= vid
;
671 adapter
->mng_vlan_id
= IGB_MNG_VLAN_NONE
;
673 if ((old_vid
!= (u16
)IGB_MNG_VLAN_NONE
) &&
675 !vlan_group_get_device(adapter
->vlgrp
, old_vid
))
676 igb_vlan_rx_kill_vid(netdev
, old_vid
);
678 adapter
->mng_vlan_id
= vid
;
683 * igb_release_hw_control - release control of the h/w to f/w
684 * @adapter: address of board private structure
686 * igb_release_hw_control resets CTRL_EXT:DRV_LOAD bit.
687 * For ASF and Pass Through versions of f/w this means that the
688 * driver is no longer loaded.
691 static void igb_release_hw_control(struct igb_adapter
*adapter
)
693 struct e1000_hw
*hw
= &adapter
->hw
;
696 /* Let firmware take over control of h/w */
697 ctrl_ext
= rd32(E1000_CTRL_EXT
);
699 ctrl_ext
& ~E1000_CTRL_EXT_DRV_LOAD
);
704 * igb_get_hw_control - get control of the h/w from f/w
705 * @adapter: address of board private structure
707 * igb_get_hw_control sets CTRL_EXT:DRV_LOAD bit.
708 * For ASF and Pass Through versions of f/w this means that
709 * the driver is loaded.
712 static void igb_get_hw_control(struct igb_adapter
*adapter
)
714 struct e1000_hw
*hw
= &adapter
->hw
;
717 /* Let firmware know the driver has taken over */
718 ctrl_ext
= rd32(E1000_CTRL_EXT
);
720 ctrl_ext
| E1000_CTRL_EXT_DRV_LOAD
);
724 * igb_configure - configure the hardware for RX and TX
725 * @adapter: private board structure
727 static void igb_configure(struct igb_adapter
*adapter
)
729 struct net_device
*netdev
= adapter
->netdev
;
732 igb_get_hw_control(adapter
);
733 igb_set_multi(netdev
);
735 igb_restore_vlan(adapter
);
737 igb_configure_tx(adapter
);
738 igb_setup_rctl(adapter
);
739 igb_configure_rx(adapter
);
741 igb_rx_fifo_flush_82575(&adapter
->hw
);
743 /* call IGB_DESC_UNUSED which always leaves
744 * at least 1 descriptor unused to make sure
745 * next_to_use != next_to_clean */
746 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
747 struct igb_ring
*ring
= &adapter
->rx_ring
[i
];
748 igb_alloc_rx_buffers_adv(ring
, IGB_DESC_UNUSED(ring
));
752 adapter
->tx_queue_len
= netdev
->tx_queue_len
;
757 * igb_up - Open the interface and prepare it to handle traffic
758 * @adapter: board private structure
761 int igb_up(struct igb_adapter
*adapter
)
763 struct e1000_hw
*hw
= &adapter
->hw
;
766 /* hardware has been reset, we need to reload some things */
767 igb_configure(adapter
);
769 clear_bit(__IGB_DOWN
, &adapter
->state
);
771 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
772 napi_enable(&adapter
->rx_ring
[i
].napi
);
773 if (adapter
->msix_entries
)
774 igb_configure_msix(adapter
);
776 /* Clear any pending interrupts. */
778 igb_irq_enable(adapter
);
780 /* Fire a link change interrupt to start the watchdog. */
781 wr32(E1000_ICS
, E1000_ICS_LSC
);
785 void igb_down(struct igb_adapter
*adapter
)
787 struct e1000_hw
*hw
= &adapter
->hw
;
788 struct net_device
*netdev
= adapter
->netdev
;
792 /* signal that we're down so the interrupt handler does not
793 * reschedule our watchdog timer */
794 set_bit(__IGB_DOWN
, &adapter
->state
);
796 /* disable receives in the hardware */
797 rctl
= rd32(E1000_RCTL
);
798 wr32(E1000_RCTL
, rctl
& ~E1000_RCTL_EN
);
799 /* flush and sleep below */
801 netif_tx_stop_all_queues(netdev
);
803 /* disable transmits in the hardware */
804 tctl
= rd32(E1000_TCTL
);
805 tctl
&= ~E1000_TCTL_EN
;
806 wr32(E1000_TCTL
, tctl
);
807 /* flush both disables and wait for them to finish */
811 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
812 napi_disable(&adapter
->rx_ring
[i
].napi
);
814 igb_irq_disable(adapter
);
816 del_timer_sync(&adapter
->watchdog_timer
);
817 del_timer_sync(&adapter
->phy_info_timer
);
819 netdev
->tx_queue_len
= adapter
->tx_queue_len
;
820 netif_carrier_off(netdev
);
821 adapter
->link_speed
= 0;
822 adapter
->link_duplex
= 0;
824 if (!pci_channel_offline(adapter
->pdev
))
826 igb_clean_all_tx_rings(adapter
);
827 igb_clean_all_rx_rings(adapter
);
830 void igb_reinit_locked(struct igb_adapter
*adapter
)
832 WARN_ON(in_interrupt());
833 while (test_and_set_bit(__IGB_RESETTING
, &adapter
->state
))
837 clear_bit(__IGB_RESETTING
, &adapter
->state
);
840 void igb_reset(struct igb_adapter
*adapter
)
842 struct e1000_hw
*hw
= &adapter
->hw
;
843 struct e1000_mac_info
*mac
= &hw
->mac
;
844 struct e1000_fc_info
*fc
= &hw
->fc
;
845 u32 pba
= 0, tx_space
, min_tx_space
, min_rx_space
;
848 /* Repartition Pba for greater than 9k mtu
849 * To take effect CTRL.RST is required.
851 if (mac
->type
!= e1000_82576
) {
858 if ((adapter
->max_frame_size
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) &&
859 (mac
->type
< e1000_82576
)) {
860 /* adjust PBA for jumbo frames */
861 wr32(E1000_PBA
, pba
);
863 /* To maintain wire speed transmits, the Tx FIFO should be
864 * large enough to accommodate two full transmit packets,
865 * rounded up to the next 1KB and expressed in KB. Likewise,
866 * the Rx FIFO should be large enough to accommodate at least
867 * one full receive packet and is similarly rounded up and
868 * expressed in KB. */
869 pba
= rd32(E1000_PBA
);
870 /* upper 16 bits has Tx packet buffer allocation size in KB */
871 tx_space
= pba
>> 16;
872 /* lower 16 bits has Rx packet buffer allocation size in KB */
874 /* the tx fifo also stores 16 bytes of information about the tx
875 * but don't include ethernet FCS because hardware appends it */
876 min_tx_space
= (adapter
->max_frame_size
+
877 sizeof(struct e1000_tx_desc
) -
879 min_tx_space
= ALIGN(min_tx_space
, 1024);
881 /* software strips receive CRC, so leave room for it */
882 min_rx_space
= adapter
->max_frame_size
;
883 min_rx_space
= ALIGN(min_rx_space
, 1024);
886 /* If current Tx allocation is less than the min Tx FIFO size,
887 * and the min Tx FIFO size is less than the current Rx FIFO
888 * allocation, take space away from current Rx allocation */
889 if (tx_space
< min_tx_space
&&
890 ((min_tx_space
- tx_space
) < pba
)) {
891 pba
= pba
- (min_tx_space
- tx_space
);
893 /* if short on rx space, rx wins and must trump tx
895 if (pba
< min_rx_space
)
898 wr32(E1000_PBA
, pba
);
901 /* flow control settings */
902 /* The high water mark must be low enough to fit one full frame
903 * (or the size used for early receive) above it in the Rx FIFO.
904 * Set it to the lower of:
905 * - 90% of the Rx FIFO size, or
906 * - the full Rx FIFO size minus one full frame */
907 hwm
= min(((pba
<< 10) * 9 / 10),
908 ((pba
<< 10) - 2 * adapter
->max_frame_size
));
910 if (mac
->type
< e1000_82576
) {
911 fc
->high_water
= hwm
& 0xFFF8; /* 8-byte granularity */
912 fc
->low_water
= fc
->high_water
- 8;
914 fc
->high_water
= hwm
& 0xFFF0; /* 16-byte granularity */
915 fc
->low_water
= fc
->high_water
- 16;
917 fc
->pause_time
= 0xFFFF;
919 fc
->type
= fc
->original_type
;
921 /* Allow time for pending master requests to run */
922 adapter
->hw
.mac
.ops
.reset_hw(&adapter
->hw
);
925 if (adapter
->hw
.mac
.ops
.init_hw(&adapter
->hw
))
926 dev_err(&adapter
->pdev
->dev
, "Hardware Error\n");
928 igb_update_mng_vlan(adapter
);
930 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
931 wr32(E1000_VET
, ETHERNET_IEEE_VLAN_TYPE
);
933 igb_reset_adaptive(&adapter
->hw
);
934 if (adapter
->hw
.phy
.ops
.get_phy_info
)
935 adapter
->hw
.phy
.ops
.get_phy_info(&adapter
->hw
);
939 * igb_is_need_ioport - determine if an adapter needs ioport resources or not
940 * @pdev: PCI device information struct
942 * Returns true if an adapter needs ioport resources
944 static int igb_is_need_ioport(struct pci_dev
*pdev
)
946 switch (pdev
->device
) {
947 /* Currently there are no adapters that need ioport resources */
954 * igb_probe - Device Initialization Routine
955 * @pdev: PCI device information struct
956 * @ent: entry in igb_pci_tbl
958 * Returns 0 on success, negative on failure
960 * igb_probe initializes an adapter identified by a pci_dev structure.
961 * The OS initialization, configuring of the adapter private structure,
962 * and a hardware reset occur.
964 static int __devinit
igb_probe(struct pci_dev
*pdev
,
965 const struct pci_device_id
*ent
)
967 struct net_device
*netdev
;
968 struct igb_adapter
*adapter
;
970 const struct e1000_info
*ei
= igb_info_tbl
[ent
->driver_data
];
971 unsigned long mmio_start
, mmio_len
;
972 int i
, err
, pci_using_dac
;
974 u16 eeprom_apme_mask
= IGB_EEPROM_APME
;
976 int bars
, need_ioport
;
978 /* do not allocate ioport bars when not needed */
979 need_ioport
= igb_is_need_ioport(pdev
);
981 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
| IORESOURCE_IO
);
982 err
= pci_enable_device(pdev
);
984 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
);
985 err
= pci_enable_device_mem(pdev
);
991 err
= pci_set_dma_mask(pdev
, DMA_64BIT_MASK
);
993 err
= pci_set_consistent_dma_mask(pdev
, DMA_64BIT_MASK
);
997 err
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
);
999 err
= pci_set_consistent_dma_mask(pdev
, DMA_32BIT_MASK
);
1001 dev_err(&pdev
->dev
, "No usable DMA "
1002 "configuration, aborting\n");
1008 err
= pci_request_selected_regions(pdev
, bars
, igb_driver_name
);
1012 pci_set_master(pdev
);
1013 pci_save_state(pdev
);
1016 netdev
= alloc_etherdev_mq(sizeof(struct igb_adapter
), IGB_MAX_TX_QUEUES
);
1018 goto err_alloc_etherdev
;
1020 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
1022 pci_set_drvdata(pdev
, netdev
);
1023 adapter
= netdev_priv(netdev
);
1024 adapter
->netdev
= netdev
;
1025 adapter
->pdev
= pdev
;
1028 adapter
->msg_enable
= NETIF_MSG_DRV
| NETIF_MSG_PROBE
;
1029 adapter
->bars
= bars
;
1030 adapter
->need_ioport
= need_ioport
;
1032 mmio_start
= pci_resource_start(pdev
, 0);
1033 mmio_len
= pci_resource_len(pdev
, 0);
1036 adapter
->hw
.hw_addr
= ioremap(mmio_start
, mmio_len
);
1037 if (!adapter
->hw
.hw_addr
)
1040 netdev
->open
= &igb_open
;
1041 netdev
->stop
= &igb_close
;
1042 netdev
->get_stats
= &igb_get_stats
;
1043 netdev
->set_multicast_list
= &igb_set_multi
;
1044 netdev
->set_mac_address
= &igb_set_mac
;
1045 netdev
->change_mtu
= &igb_change_mtu
;
1046 netdev
->do_ioctl
= &igb_ioctl
;
1047 igb_set_ethtool_ops(netdev
);
1048 netdev
->tx_timeout
= &igb_tx_timeout
;
1049 netdev
->watchdog_timeo
= 5 * HZ
;
1050 netdev
->vlan_rx_register
= igb_vlan_rx_register
;
1051 netdev
->vlan_rx_add_vid
= igb_vlan_rx_add_vid
;
1052 netdev
->vlan_rx_kill_vid
= igb_vlan_rx_kill_vid
;
1053 #ifdef CONFIG_NET_POLL_CONTROLLER
1054 netdev
->poll_controller
= igb_netpoll
;
1056 netdev
->hard_start_xmit
= &igb_xmit_frame_adv
;
1058 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
1060 netdev
->mem_start
= mmio_start
;
1061 netdev
->mem_end
= mmio_start
+ mmio_len
;
1063 /* PCI config space info */
1064 hw
->vendor_id
= pdev
->vendor
;
1065 hw
->device_id
= pdev
->device
;
1066 hw
->revision_id
= pdev
->revision
;
1067 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
1068 hw
->subsystem_device_id
= pdev
->subsystem_device
;
1070 /* setup the private structure */
1072 /* Copy the default MAC, PHY and NVM function pointers */
1073 memcpy(&hw
->mac
.ops
, ei
->mac_ops
, sizeof(hw
->mac
.ops
));
1074 memcpy(&hw
->phy
.ops
, ei
->phy_ops
, sizeof(hw
->phy
.ops
));
1075 memcpy(&hw
->nvm
.ops
, ei
->nvm_ops
, sizeof(hw
->nvm
.ops
));
1076 /* Initialize skew-specific constants */
1077 err
= ei
->get_invariants(hw
);
1081 err
= igb_sw_init(adapter
);
1085 igb_get_bus_info_pcie(hw
);
1088 switch (hw
->mac
.type
) {
1091 adapter
->flags
|= IGB_FLAG_HAS_DCA
;
1092 adapter
->flags
|= IGB_FLAG_NEED_CTX_IDX
;
1098 hw
->phy
.autoneg_wait_to_complete
= false;
1099 hw
->mac
.adaptive_ifs
= true;
1101 /* Copper options */
1102 if (hw
->phy
.media_type
== e1000_media_type_copper
) {
1103 hw
->phy
.mdix
= AUTO_ALL_MODES
;
1104 hw
->phy
.disable_polarity_correction
= false;
1105 hw
->phy
.ms_type
= e1000_ms_hw_default
;
1108 if (igb_check_reset_block(hw
))
1109 dev_info(&pdev
->dev
,
1110 "PHY reset is blocked due to SOL/IDER session.\n");
1112 netdev
->features
= NETIF_F_SG
|
1114 NETIF_F_HW_VLAN_TX
|
1115 NETIF_F_HW_VLAN_RX
|
1116 NETIF_F_HW_VLAN_FILTER
;
1118 netdev
->features
|= NETIF_F_TSO
;
1119 netdev
->features
|= NETIF_F_TSO6
;
1121 #ifdef CONFIG_IGB_LRO
1122 netdev
->features
|= NETIF_F_LRO
;
1125 netdev
->vlan_features
|= NETIF_F_TSO
;
1126 netdev
->vlan_features
|= NETIF_F_TSO6
;
1127 netdev
->vlan_features
|= NETIF_F_HW_CSUM
;
1128 netdev
->vlan_features
|= NETIF_F_SG
;
1131 netdev
->features
|= NETIF_F_HIGHDMA
;
1133 netdev
->features
|= NETIF_F_LLTX
;
1134 adapter
->en_mng_pt
= igb_enable_mng_pass_thru(&adapter
->hw
);
1136 /* before reading the NVM, reset the controller to put the device in a
1137 * known good starting state */
1138 hw
->mac
.ops
.reset_hw(hw
);
1140 /* make sure the NVM is good */
1141 if (igb_validate_nvm_checksum(hw
) < 0) {
1142 dev_err(&pdev
->dev
, "The NVM Checksum Is Not Valid\n");
1147 /* copy the MAC address out of the NVM */
1148 if (hw
->mac
.ops
.read_mac_addr(hw
))
1149 dev_err(&pdev
->dev
, "NVM Read Error\n");
1151 memcpy(netdev
->dev_addr
, hw
->mac
.addr
, netdev
->addr_len
);
1152 memcpy(netdev
->perm_addr
, hw
->mac
.addr
, netdev
->addr_len
);
1154 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
1155 dev_err(&pdev
->dev
, "Invalid MAC Address\n");
1160 init_timer(&adapter
->watchdog_timer
);
1161 adapter
->watchdog_timer
.function
= &igb_watchdog
;
1162 adapter
->watchdog_timer
.data
= (unsigned long) adapter
;
1164 init_timer(&adapter
->phy_info_timer
);
1165 adapter
->phy_info_timer
.function
= &igb_update_phy_info
;
1166 adapter
->phy_info_timer
.data
= (unsigned long) adapter
;
1168 INIT_WORK(&adapter
->reset_task
, igb_reset_task
);
1169 INIT_WORK(&adapter
->watchdog_task
, igb_watchdog_task
);
1171 /* Initialize link & ring properties that are user-changeable */
1172 adapter
->tx_ring
->count
= 256;
1173 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
1174 adapter
->tx_ring
[i
].count
= adapter
->tx_ring
->count
;
1175 adapter
->rx_ring
->count
= 256;
1176 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
1177 adapter
->rx_ring
[i
].count
= adapter
->rx_ring
->count
;
1179 adapter
->fc_autoneg
= true;
1180 hw
->mac
.autoneg
= true;
1181 hw
->phy
.autoneg_advertised
= 0x2f;
1183 hw
->fc
.original_type
= e1000_fc_default
;
1184 hw
->fc
.type
= e1000_fc_default
;
1186 adapter
->itr_setting
= 3;
1187 adapter
->itr
= IGB_START_ITR
;
1189 igb_validate_mdi_setting(hw
);
1191 adapter
->rx_csum
= 1;
1193 /* Initial Wake on LAN setting If APM wake is enabled in the EEPROM,
1194 * enable the ACPI Magic Packet filter
1197 if (hw
->bus
.func
== 0 ||
1198 hw
->device_id
== E1000_DEV_ID_82575EB_COPPER
)
1199 hw
->nvm
.ops
.read_nvm(hw
, NVM_INIT_CONTROL3_PORT_A
, 1,
1202 if (eeprom_data
& eeprom_apme_mask
)
1203 adapter
->eeprom_wol
|= E1000_WUFC_MAG
;
1205 /* now that we have the eeprom settings, apply the special cases where
1206 * the eeprom may be wrong or the board simply won't support wake on
1207 * lan on a particular port */
1208 switch (pdev
->device
) {
1209 case E1000_DEV_ID_82575GB_QUAD_COPPER
:
1210 adapter
->eeprom_wol
= 0;
1212 case E1000_DEV_ID_82575EB_FIBER_SERDES
:
1213 case E1000_DEV_ID_82576_FIBER
:
1214 case E1000_DEV_ID_82576_SERDES
:
1215 /* Wake events only supported on port A for dual fiber
1216 * regardless of eeprom setting */
1217 if (rd32(E1000_STATUS
) & E1000_STATUS_FUNC_1
)
1218 adapter
->eeprom_wol
= 0;
1220 case E1000_DEV_ID_82576_QUAD_COPPER
:
1221 /* if quad port adapter, disable WoL on all but port A */
1222 if (global_quad_port_a
!= 0)
1223 adapter
->eeprom_wol
= 0;
1225 adapter
->flags
|= IGB_FLAG_QUAD_PORT_A
;
1226 /* Reset for multiple quad port adapters */
1227 if (++global_quad_port_a
== 4)
1228 global_quad_port_a
= 0;
1232 /* initialize the wol settings based on the eeprom settings */
1233 adapter
->wol
= adapter
->eeprom_wol
;
1235 /* reset the hardware with the new settings */
1238 /* let the f/w know that the h/w is now under the control of the
1240 igb_get_hw_control(adapter
);
1242 /* tell the stack to leave us alone until igb_open() is called */
1243 netif_carrier_off(netdev
);
1244 netif_tx_stop_all_queues(netdev
);
1246 strcpy(netdev
->name
, "eth%d");
1247 err
= register_netdev(netdev
);
1252 if ((adapter
->flags
& IGB_FLAG_HAS_DCA
) &&
1253 (dca_add_requester(&pdev
->dev
) == 0)) {
1254 adapter
->flags
|= IGB_FLAG_DCA_ENABLED
;
1255 dev_info(&pdev
->dev
, "DCA enabled\n");
1256 /* Always use CB2 mode, difference is masked
1257 * in the CB driver. */
1258 wr32(E1000_DCA_CTRL
, 2);
1259 igb_setup_dca(adapter
);
1263 dev_info(&pdev
->dev
, "Intel(R) Gigabit Ethernet Network Connection\n");
1264 /* print bus type/speed/width info */
1265 dev_info(&pdev
->dev
,
1266 "%s: (PCIe:%s:%s) %02x:%02x:%02x:%02x:%02x:%02x\n",
1268 ((hw
->bus
.speed
== e1000_bus_speed_2500
)
1269 ? "2.5Gb/s" : "unknown"),
1270 ((hw
->bus
.width
== e1000_bus_width_pcie_x4
)
1271 ? "Width x4" : (hw
->bus
.width
== e1000_bus_width_pcie_x1
)
1272 ? "Width x1" : "unknown"),
1273 netdev
->dev_addr
[0], netdev
->dev_addr
[1], netdev
->dev_addr
[2],
1274 netdev
->dev_addr
[3], netdev
->dev_addr
[4], netdev
->dev_addr
[5]);
1276 igb_read_part_num(hw
, &part_num
);
1277 dev_info(&pdev
->dev
, "%s: PBA No: %06x-%03x\n", netdev
->name
,
1278 (part_num
>> 8), (part_num
& 0xff));
1280 dev_info(&pdev
->dev
,
1281 "Using %s interrupts. %d rx queue(s), %d tx queue(s)\n",
1282 adapter
->msix_entries
? "MSI-X" :
1283 (adapter
->flags
& IGB_FLAG_HAS_MSI
) ? "MSI" : "legacy",
1284 adapter
->num_rx_queues
, adapter
->num_tx_queues
);
1289 igb_release_hw_control(adapter
);
1291 if (!igb_check_reset_block(hw
))
1292 hw
->phy
.ops
.reset_phy(hw
);
1294 if (hw
->flash_address
)
1295 iounmap(hw
->flash_address
);
1297 igb_remove_device(hw
);
1298 igb_free_queues(adapter
);
1301 iounmap(hw
->hw_addr
);
1303 free_netdev(netdev
);
1305 pci_release_selected_regions(pdev
, bars
);
1308 pci_disable_device(pdev
);
1313 * igb_remove - Device Removal Routine
1314 * @pdev: PCI device information struct
1316 * igb_remove is called by the PCI subsystem to alert the driver
1317 * that it should release a PCI device. The could be caused by a
1318 * Hot-Plug event, or because the driver is going to be removed from
1321 static void __devexit
igb_remove(struct pci_dev
*pdev
)
1323 struct net_device
*netdev
= pci_get_drvdata(pdev
);
1324 struct igb_adapter
*adapter
= netdev_priv(netdev
);
1326 struct e1000_hw
*hw
= &adapter
->hw
;
1329 /* flush_scheduled work may reschedule our watchdog task, so
1330 * explicitly disable watchdog tasks from being rescheduled */
1331 set_bit(__IGB_DOWN
, &adapter
->state
);
1332 del_timer_sync(&adapter
->watchdog_timer
);
1333 del_timer_sync(&adapter
->phy_info_timer
);
1335 flush_scheduled_work();
1338 if (adapter
->flags
& IGB_FLAG_DCA_ENABLED
) {
1339 dev_info(&pdev
->dev
, "DCA disabled\n");
1340 dca_remove_requester(&pdev
->dev
);
1341 adapter
->flags
&= ~IGB_FLAG_DCA_ENABLED
;
1342 wr32(E1000_DCA_CTRL
, 1);
1346 /* Release control of h/w to f/w. If f/w is AMT enabled, this
1347 * would have already happened in close and is redundant. */
1348 igb_release_hw_control(adapter
);
1350 unregister_netdev(netdev
);
1352 if (adapter
->hw
.phy
.ops
.reset_phy
&&
1353 !igb_check_reset_block(&adapter
->hw
))
1354 adapter
->hw
.phy
.ops
.reset_phy(&adapter
->hw
);
1356 igb_remove_device(&adapter
->hw
);
1357 igb_reset_interrupt_capability(adapter
);
1359 igb_free_queues(adapter
);
1361 iounmap(adapter
->hw
.hw_addr
);
1362 if (adapter
->hw
.flash_address
)
1363 iounmap(adapter
->hw
.flash_address
);
1364 pci_release_selected_regions(pdev
, adapter
->bars
);
1366 free_netdev(netdev
);
1368 pci_disable_device(pdev
);
1372 * igb_sw_init - Initialize general software structures (struct igb_adapter)
1373 * @adapter: board private structure to initialize
1375 * igb_sw_init initializes the Adapter private data structure.
1376 * Fields are initialized based on PCI device information and
1377 * OS network device settings (MTU size).
1379 static int __devinit
igb_sw_init(struct igb_adapter
*adapter
)
1381 struct e1000_hw
*hw
= &adapter
->hw
;
1382 struct net_device
*netdev
= adapter
->netdev
;
1383 struct pci_dev
*pdev
= adapter
->pdev
;
1385 pci_read_config_word(pdev
, PCI_COMMAND
, &hw
->bus
.pci_cmd_word
);
1387 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
1388 adapter
->rx_ps_hdr_size
= 0; /* disable packet split */
1389 adapter
->max_frame_size
= netdev
->mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
1390 adapter
->min_frame_size
= ETH_ZLEN
+ ETH_FCS_LEN
;
1392 /* Number of supported queues. */
1393 /* Having more queues than CPUs doesn't make sense. */
1394 adapter
->num_rx_queues
= min((u32
)IGB_MAX_RX_QUEUES
, (u32
)num_online_cpus());
1395 adapter
->num_tx_queues
= min(IGB_MAX_TX_QUEUES
, num_online_cpus());
1397 /* This call may decrease the number of queues depending on
1398 * interrupt mode. */
1399 igb_set_interrupt_capability(adapter
);
1401 if (igb_alloc_queues(adapter
)) {
1402 dev_err(&pdev
->dev
, "Unable to allocate memory for queues\n");
1406 /* Explicitly disable IRQ since the NIC can be in any state. */
1407 igb_irq_disable(adapter
);
1409 set_bit(__IGB_DOWN
, &adapter
->state
);
1414 * igb_open - Called when a network interface is made active
1415 * @netdev: network interface device structure
1417 * Returns 0 on success, negative value on failure
1419 * The open entry point is called when a network interface is made
1420 * active by the system (IFF_UP). At this point all resources needed
1421 * for transmit and receive operations are allocated, the interrupt
1422 * handler is registered with the OS, the watchdog timer is started,
1423 * and the stack is notified that the interface is ready.
1425 static int igb_open(struct net_device
*netdev
)
1427 struct igb_adapter
*adapter
= netdev_priv(netdev
);
1428 struct e1000_hw
*hw
= &adapter
->hw
;
1432 /* disallow open during test */
1433 if (test_bit(__IGB_TESTING
, &adapter
->state
))
1436 /* allocate transmit descriptors */
1437 err
= igb_setup_all_tx_resources(adapter
);
1441 /* allocate receive descriptors */
1442 err
= igb_setup_all_rx_resources(adapter
);
1446 /* e1000_power_up_phy(adapter); */
1448 adapter
->mng_vlan_id
= IGB_MNG_VLAN_NONE
;
1449 if ((adapter
->hw
.mng_cookie
.status
&
1450 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
))
1451 igb_update_mng_vlan(adapter
);
1453 /* before we allocate an interrupt, we must be ready to handle it.
1454 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1455 * as soon as we call pci_request_irq, so we have to setup our
1456 * clean_rx handler before we do so. */
1457 igb_configure(adapter
);
1459 err
= igb_request_irq(adapter
);
1463 /* From here on the code is the same as igb_up() */
1464 clear_bit(__IGB_DOWN
, &adapter
->state
);
1466 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
1467 napi_enable(&adapter
->rx_ring
[i
].napi
);
1469 /* Clear any pending interrupts. */
1472 igb_irq_enable(adapter
);
1474 netif_tx_start_all_queues(netdev
);
1476 /* Fire a link status change interrupt to start the watchdog. */
1477 wr32(E1000_ICS
, E1000_ICS_LSC
);
1482 igb_release_hw_control(adapter
);
1483 /* e1000_power_down_phy(adapter); */
1484 igb_free_all_rx_resources(adapter
);
1486 igb_free_all_tx_resources(adapter
);
1494 * igb_close - Disables a network interface
1495 * @netdev: network interface device structure
1497 * Returns 0, this is not allowed to fail
1499 * The close entry point is called when an interface is de-activated
1500 * by the OS. The hardware is still under the driver's control, but
1501 * needs to be disabled. A global MAC reset is issued to stop the
1502 * hardware, and all transmit and receive resources are freed.
1504 static int igb_close(struct net_device
*netdev
)
1506 struct igb_adapter
*adapter
= netdev_priv(netdev
);
1508 WARN_ON(test_bit(__IGB_RESETTING
, &adapter
->state
));
1511 igb_free_irq(adapter
);
1513 igb_free_all_tx_resources(adapter
);
1514 igb_free_all_rx_resources(adapter
);
1516 /* kill manageability vlan ID if supported, but not if a vlan with
1517 * the same ID is registered on the host OS (let 8021q kill it) */
1518 if ((adapter
->hw
.mng_cookie
.status
&
1519 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
1521 vlan_group_get_device(adapter
->vlgrp
, adapter
->mng_vlan_id
)))
1522 igb_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
1528 * igb_setup_tx_resources - allocate Tx resources (Descriptors)
1529 * @adapter: board private structure
1530 * @tx_ring: tx descriptor ring (for a specific queue) to setup
1532 * Return 0 on success, negative on failure
1535 int igb_setup_tx_resources(struct igb_adapter
*adapter
,
1536 struct igb_ring
*tx_ring
)
1538 struct pci_dev
*pdev
= adapter
->pdev
;
1541 size
= sizeof(struct igb_buffer
) * tx_ring
->count
;
1542 tx_ring
->buffer_info
= vmalloc(size
);
1543 if (!tx_ring
->buffer_info
)
1545 memset(tx_ring
->buffer_info
, 0, size
);
1547 /* round up to nearest 4K */
1548 tx_ring
->size
= tx_ring
->count
* sizeof(struct e1000_tx_desc
)
1550 tx_ring
->size
= ALIGN(tx_ring
->size
, 4096);
1552 tx_ring
->desc
= pci_alloc_consistent(pdev
, tx_ring
->size
,
1558 tx_ring
->adapter
= adapter
;
1559 tx_ring
->next_to_use
= 0;
1560 tx_ring
->next_to_clean
= 0;
1564 vfree(tx_ring
->buffer_info
);
1565 dev_err(&adapter
->pdev
->dev
,
1566 "Unable to allocate memory for the transmit descriptor ring\n");
1571 * igb_setup_all_tx_resources - wrapper to allocate Tx resources
1572 * (Descriptors) for all queues
1573 * @adapter: board private structure
1575 * Return 0 on success, negative on failure
1577 static int igb_setup_all_tx_resources(struct igb_adapter
*adapter
)
1582 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
1583 err
= igb_setup_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1585 dev_err(&adapter
->pdev
->dev
,
1586 "Allocation for Tx Queue %u failed\n", i
);
1587 for (i
--; i
>= 0; i
--)
1588 igb_free_tx_resources(&adapter
->tx_ring
[i
]);
1593 for (i
= 0; i
< IGB_MAX_TX_QUEUES
; i
++) {
1594 r_idx
= i
% adapter
->num_tx_queues
;
1595 adapter
->multi_tx_table
[i
] = &adapter
->tx_ring
[r_idx
];
1601 * igb_configure_tx - Configure transmit Unit after Reset
1602 * @adapter: board private structure
1604 * Configure the Tx unit of the MAC after a reset.
1606 static void igb_configure_tx(struct igb_adapter
*adapter
)
1609 struct e1000_hw
*hw
= &adapter
->hw
;
1614 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
1615 struct igb_ring
*ring
= &(adapter
->tx_ring
[i
]);
1617 wr32(E1000_TDLEN(i
),
1618 ring
->count
* sizeof(struct e1000_tx_desc
));
1620 wr32(E1000_TDBAL(i
),
1621 tdba
& 0x00000000ffffffffULL
);
1622 wr32(E1000_TDBAH(i
), tdba
>> 32);
1624 tdwba
= ring
->dma
+ ring
->count
* sizeof(struct e1000_tx_desc
);
1625 tdwba
|= 1; /* enable head wb */
1626 wr32(E1000_TDWBAL(i
),
1627 tdwba
& 0x00000000ffffffffULL
);
1628 wr32(E1000_TDWBAH(i
), tdwba
>> 32);
1630 ring
->head
= E1000_TDH(i
);
1631 ring
->tail
= E1000_TDT(i
);
1632 writel(0, hw
->hw_addr
+ ring
->tail
);
1633 writel(0, hw
->hw_addr
+ ring
->head
);
1634 txdctl
= rd32(E1000_TXDCTL(i
));
1635 txdctl
|= E1000_TXDCTL_QUEUE_ENABLE
;
1636 wr32(E1000_TXDCTL(i
), txdctl
);
1638 /* Turn off Relaxed Ordering on head write-backs. The
1639 * writebacks MUST be delivered in order or it will
1640 * completely screw up our bookeeping.
1642 txctrl
= rd32(E1000_DCA_TXCTRL(i
));
1643 txctrl
&= ~E1000_DCA_TXCTRL_TX_WB_RO_EN
;
1644 wr32(E1000_DCA_TXCTRL(i
), txctrl
);
1649 /* Use the default values for the Tx Inter Packet Gap (IPG) timer */
1651 /* Program the Transmit Control Register */
1653 tctl
= rd32(E1000_TCTL
);
1654 tctl
&= ~E1000_TCTL_CT
;
1655 tctl
|= E1000_TCTL_PSP
| E1000_TCTL_RTLC
|
1656 (E1000_COLLISION_THRESHOLD
<< E1000_CT_SHIFT
);
1658 igb_config_collision_dist(hw
);
1660 /* Setup Transmit Descriptor Settings for eop descriptor */
1661 adapter
->txd_cmd
= E1000_TXD_CMD_EOP
| E1000_TXD_CMD_RS
;
1663 /* Enable transmits */
1664 tctl
|= E1000_TCTL_EN
;
1666 wr32(E1000_TCTL
, tctl
);
1670 * igb_setup_rx_resources - allocate Rx resources (Descriptors)
1671 * @adapter: board private structure
1672 * @rx_ring: rx descriptor ring (for a specific queue) to setup
1674 * Returns 0 on success, negative on failure
1677 int igb_setup_rx_resources(struct igb_adapter
*adapter
,
1678 struct igb_ring
*rx_ring
)
1680 struct pci_dev
*pdev
= adapter
->pdev
;
1683 #ifdef CONFIG_IGB_LRO
1684 size
= sizeof(struct net_lro_desc
) * MAX_LRO_DESCRIPTORS
;
1685 rx_ring
->lro_mgr
.lro_arr
= vmalloc(size
);
1686 if (!rx_ring
->lro_mgr
.lro_arr
)
1688 memset(rx_ring
->lro_mgr
.lro_arr
, 0, size
);
1691 size
= sizeof(struct igb_buffer
) * rx_ring
->count
;
1692 rx_ring
->buffer_info
= vmalloc(size
);
1693 if (!rx_ring
->buffer_info
)
1695 memset(rx_ring
->buffer_info
, 0, size
);
1697 desc_len
= sizeof(union e1000_adv_rx_desc
);
1699 /* Round up to nearest 4K */
1700 rx_ring
->size
= rx_ring
->count
* desc_len
;
1701 rx_ring
->size
= ALIGN(rx_ring
->size
, 4096);
1703 rx_ring
->desc
= pci_alloc_consistent(pdev
, rx_ring
->size
,
1709 rx_ring
->next_to_clean
= 0;
1710 rx_ring
->next_to_use
= 0;
1712 rx_ring
->adapter
= adapter
;
1717 #ifdef CONFIG_IGB_LRO
1718 vfree(rx_ring
->lro_mgr
.lro_arr
);
1719 rx_ring
->lro_mgr
.lro_arr
= NULL
;
1721 vfree(rx_ring
->buffer_info
);
1722 dev_err(&adapter
->pdev
->dev
, "Unable to allocate memory for "
1723 "the receive descriptor ring\n");
1728 * igb_setup_all_rx_resources - wrapper to allocate Rx resources
1729 * (Descriptors) for all queues
1730 * @adapter: board private structure
1732 * Return 0 on success, negative on failure
1734 static int igb_setup_all_rx_resources(struct igb_adapter
*adapter
)
1738 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
1739 err
= igb_setup_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
1741 dev_err(&adapter
->pdev
->dev
,
1742 "Allocation for Rx Queue %u failed\n", i
);
1743 for (i
--; i
>= 0; i
--)
1744 igb_free_rx_resources(&adapter
->rx_ring
[i
]);
1753 * igb_setup_rctl - configure the receive control registers
1754 * @adapter: Board private structure
1756 static void igb_setup_rctl(struct igb_adapter
*adapter
)
1758 struct e1000_hw
*hw
= &adapter
->hw
;
1763 rctl
= rd32(E1000_RCTL
);
1765 rctl
&= ~(3 << E1000_RCTL_MO_SHIFT
);
1767 rctl
|= E1000_RCTL_EN
| E1000_RCTL_BAM
|
1768 E1000_RCTL_LBM_NO
| E1000_RCTL_RDMTS_HALF
|
1769 (adapter
->hw
.mac
.mc_filter_type
<< E1000_RCTL_MO_SHIFT
);
1772 * enable stripping of CRC. It's unlikely this will break BMC
1773 * redirection as it did with e1000. Newer features require
1774 * that the HW strips the CRC.
1776 rctl
|= E1000_RCTL_SECRC
;
1778 rctl
&= ~E1000_RCTL_SBP
;
1780 if (adapter
->netdev
->mtu
<= ETH_DATA_LEN
)
1781 rctl
&= ~E1000_RCTL_LPE
;
1783 rctl
|= E1000_RCTL_LPE
;
1784 if (adapter
->rx_buffer_len
<= IGB_RXBUFFER_2048
) {
1785 /* Setup buffer sizes */
1786 rctl
&= ~E1000_RCTL_SZ_4096
;
1787 rctl
|= E1000_RCTL_BSEX
;
1788 switch (adapter
->rx_buffer_len
) {
1789 case IGB_RXBUFFER_256
:
1790 rctl
|= E1000_RCTL_SZ_256
;
1791 rctl
&= ~E1000_RCTL_BSEX
;
1793 case IGB_RXBUFFER_512
:
1794 rctl
|= E1000_RCTL_SZ_512
;
1795 rctl
&= ~E1000_RCTL_BSEX
;
1797 case IGB_RXBUFFER_1024
:
1798 rctl
|= E1000_RCTL_SZ_1024
;
1799 rctl
&= ~E1000_RCTL_BSEX
;
1801 case IGB_RXBUFFER_2048
:
1803 rctl
|= E1000_RCTL_SZ_2048
;
1804 rctl
&= ~E1000_RCTL_BSEX
;
1808 rctl
&= ~E1000_RCTL_BSEX
;
1809 srrctl
= adapter
->rx_buffer_len
>> E1000_SRRCTL_BSIZEPKT_SHIFT
;
1812 /* 82575 and greater support packet-split where the protocol
1813 * header is placed in skb->data and the packet data is
1814 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1815 * In the case of a non-split, skb->data is linearly filled,
1816 * followed by the page buffers. Therefore, skb->data is
1817 * sized to hold the largest protocol header.
1819 /* allocations using alloc_page take too long for regular MTU
1820 * so only enable packet split for jumbo frames */
1821 if (rctl
& E1000_RCTL_LPE
) {
1822 adapter
->rx_ps_hdr_size
= IGB_RXBUFFER_128
;
1823 srrctl
|= adapter
->rx_ps_hdr_size
<<
1824 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT
;
1825 srrctl
|= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS
;
1827 adapter
->rx_ps_hdr_size
= 0;
1828 srrctl
|= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF
;
1831 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
1832 wr32(E1000_SRRCTL(i
), srrctl
);
1834 wr32(E1000_RCTL
, rctl
);
1838 * igb_configure_rx - Configure receive Unit after Reset
1839 * @adapter: board private structure
1841 * Configure the Rx unit of the MAC after a reset.
1843 static void igb_configure_rx(struct igb_adapter
*adapter
)
1846 struct e1000_hw
*hw
= &adapter
->hw
;
1851 /* disable receives while setting up the descriptors */
1852 rctl
= rd32(E1000_RCTL
);
1853 wr32(E1000_RCTL
, rctl
& ~E1000_RCTL_EN
);
1857 if (adapter
->itr_setting
> 3)
1858 wr32(E1000_ITR
, adapter
->itr
);
1860 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1861 * the Base and Length of the Rx Descriptor Ring */
1862 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
1863 struct igb_ring
*ring
= &(adapter
->rx_ring
[i
]);
1865 wr32(E1000_RDBAL(i
),
1866 rdba
& 0x00000000ffffffffULL
);
1867 wr32(E1000_RDBAH(i
), rdba
>> 32);
1868 wr32(E1000_RDLEN(i
),
1869 ring
->count
* sizeof(union e1000_adv_rx_desc
));
1871 ring
->head
= E1000_RDH(i
);
1872 ring
->tail
= E1000_RDT(i
);
1873 writel(0, hw
->hw_addr
+ ring
->tail
);
1874 writel(0, hw
->hw_addr
+ ring
->head
);
1876 rxdctl
= rd32(E1000_RXDCTL(i
));
1877 rxdctl
|= E1000_RXDCTL_QUEUE_ENABLE
;
1878 rxdctl
&= 0xFFF00000;
1879 rxdctl
|= IGB_RX_PTHRESH
;
1880 rxdctl
|= IGB_RX_HTHRESH
<< 8;
1881 rxdctl
|= IGB_RX_WTHRESH
<< 16;
1882 wr32(E1000_RXDCTL(i
), rxdctl
);
1883 #ifdef CONFIG_IGB_LRO
1884 /* Intitial LRO Settings */
1885 ring
->lro_mgr
.max_aggr
= MAX_LRO_AGGR
;
1886 ring
->lro_mgr
.max_desc
= MAX_LRO_DESCRIPTORS
;
1887 ring
->lro_mgr
.get_skb_header
= igb_get_skb_hdr
;
1888 ring
->lro_mgr
.features
= LRO_F_NAPI
| LRO_F_EXTRACT_VLAN_ID
;
1889 ring
->lro_mgr
.dev
= adapter
->netdev
;
1890 ring
->lro_mgr
.ip_summed
= CHECKSUM_UNNECESSARY
;
1891 ring
->lro_mgr
.ip_summed_aggr
= CHECKSUM_UNNECESSARY
;
1895 if (adapter
->num_rx_queues
> 1) {
1904 get_random_bytes(&random
[0], 40);
1906 if (hw
->mac
.type
>= e1000_82576
)
1910 for (j
= 0; j
< (32 * 4); j
++) {
1912 (j
% adapter
->num_rx_queues
) << shift
;
1915 hw
->hw_addr
+ E1000_RETA(0) + (j
& ~3));
1917 mrqc
= E1000_MRQC_ENABLE_RSS_4Q
;
1919 /* Fill out hash function seeds */
1920 for (j
= 0; j
< 10; j
++)
1921 array_wr32(E1000_RSSRK(0), j
, random
[j
]);
1923 mrqc
|= (E1000_MRQC_RSS_FIELD_IPV4
|
1924 E1000_MRQC_RSS_FIELD_IPV4_TCP
);
1925 mrqc
|= (E1000_MRQC_RSS_FIELD_IPV6
|
1926 E1000_MRQC_RSS_FIELD_IPV6_TCP
);
1927 mrqc
|= (E1000_MRQC_RSS_FIELD_IPV4_UDP
|
1928 E1000_MRQC_RSS_FIELD_IPV6_UDP
);
1929 mrqc
|= (E1000_MRQC_RSS_FIELD_IPV6_UDP_EX
|
1930 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX
);
1933 wr32(E1000_MRQC
, mrqc
);
1935 /* Multiqueue and raw packet checksumming are mutually
1936 * exclusive. Note that this not the same as TCP/IP
1937 * checksumming, which works fine. */
1938 rxcsum
= rd32(E1000_RXCSUM
);
1939 rxcsum
|= E1000_RXCSUM_PCSD
;
1940 wr32(E1000_RXCSUM
, rxcsum
);
1942 /* Enable Receive Checksum Offload for TCP and UDP */
1943 rxcsum
= rd32(E1000_RXCSUM
);
1944 if (adapter
->rx_csum
) {
1945 rxcsum
|= E1000_RXCSUM_TUOFL
;
1947 /* Enable IPv4 payload checksum for UDP fragments
1948 * Must be used in conjunction with packet-split. */
1949 if (adapter
->rx_ps_hdr_size
)
1950 rxcsum
|= E1000_RXCSUM_IPPCSE
;
1952 rxcsum
&= ~E1000_RXCSUM_TUOFL
;
1953 /* don't need to clear IPPCSE as it defaults to 0 */
1955 wr32(E1000_RXCSUM
, rxcsum
);
1960 adapter
->max_frame_size
+ VLAN_TAG_SIZE
);
1962 wr32(E1000_RLPML
, adapter
->max_frame_size
);
1964 /* Enable Receives */
1965 wr32(E1000_RCTL
, rctl
);
1969 * igb_free_tx_resources - Free Tx Resources per Queue
1970 * @adapter: board private structure
1971 * @tx_ring: Tx descriptor ring for a specific queue
1973 * Free all transmit software resources
1975 static void igb_free_tx_resources(struct igb_ring
*tx_ring
)
1977 struct pci_dev
*pdev
= tx_ring
->adapter
->pdev
;
1979 igb_clean_tx_ring(tx_ring
);
1981 vfree(tx_ring
->buffer_info
);
1982 tx_ring
->buffer_info
= NULL
;
1984 pci_free_consistent(pdev
, tx_ring
->size
, tx_ring
->desc
, tx_ring
->dma
);
1986 tx_ring
->desc
= NULL
;
1990 * igb_free_all_tx_resources - Free Tx Resources for All Queues
1991 * @adapter: board private structure
1993 * Free all transmit software resources
1995 static void igb_free_all_tx_resources(struct igb_adapter
*adapter
)
1999 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2000 igb_free_tx_resources(&adapter
->tx_ring
[i
]);
2003 static void igb_unmap_and_free_tx_resource(struct igb_adapter
*adapter
,
2004 struct igb_buffer
*buffer_info
)
2006 if (buffer_info
->dma
) {
2007 pci_unmap_page(adapter
->pdev
,
2009 buffer_info
->length
,
2011 buffer_info
->dma
= 0;
2013 if (buffer_info
->skb
) {
2014 dev_kfree_skb_any(buffer_info
->skb
);
2015 buffer_info
->skb
= NULL
;
2017 buffer_info
->time_stamp
= 0;
2018 /* buffer_info must be completely set up in the transmit path */
2022 * igb_clean_tx_ring - Free Tx Buffers
2023 * @adapter: board private structure
2024 * @tx_ring: ring to be cleaned
2026 static void igb_clean_tx_ring(struct igb_ring
*tx_ring
)
2028 struct igb_adapter
*adapter
= tx_ring
->adapter
;
2029 struct igb_buffer
*buffer_info
;
2033 if (!tx_ring
->buffer_info
)
2035 /* Free all the Tx ring sk_buffs */
2037 for (i
= 0; i
< tx_ring
->count
; i
++) {
2038 buffer_info
= &tx_ring
->buffer_info
[i
];
2039 igb_unmap_and_free_tx_resource(adapter
, buffer_info
);
2042 size
= sizeof(struct igb_buffer
) * tx_ring
->count
;
2043 memset(tx_ring
->buffer_info
, 0, size
);
2045 /* Zero out the descriptor ring */
2047 memset(tx_ring
->desc
, 0, tx_ring
->size
);
2049 tx_ring
->next_to_use
= 0;
2050 tx_ring
->next_to_clean
= 0;
2052 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->head
);
2053 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
2057 * igb_clean_all_tx_rings - Free Tx Buffers for all queues
2058 * @adapter: board private structure
2060 static void igb_clean_all_tx_rings(struct igb_adapter
*adapter
)
2064 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2065 igb_clean_tx_ring(&adapter
->tx_ring
[i
]);
2069 * igb_free_rx_resources - Free Rx Resources
2070 * @adapter: board private structure
2071 * @rx_ring: ring to clean the resources from
2073 * Free all receive software resources
2075 static void igb_free_rx_resources(struct igb_ring
*rx_ring
)
2077 struct pci_dev
*pdev
= rx_ring
->adapter
->pdev
;
2079 igb_clean_rx_ring(rx_ring
);
2081 vfree(rx_ring
->buffer_info
);
2082 rx_ring
->buffer_info
= NULL
;
2084 #ifdef CONFIG_IGB_LRO
2085 vfree(rx_ring
->lro_mgr
.lro_arr
);
2086 rx_ring
->lro_mgr
.lro_arr
= NULL
;
2089 pci_free_consistent(pdev
, rx_ring
->size
, rx_ring
->desc
, rx_ring
->dma
);
2091 rx_ring
->desc
= NULL
;
2095 * igb_free_all_rx_resources - Free Rx Resources for All Queues
2096 * @adapter: board private structure
2098 * Free all receive software resources
2100 static void igb_free_all_rx_resources(struct igb_adapter
*adapter
)
2104 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2105 igb_free_rx_resources(&adapter
->rx_ring
[i
]);
2109 * igb_clean_rx_ring - Free Rx Buffers per Queue
2110 * @adapter: board private structure
2111 * @rx_ring: ring to free buffers from
2113 static void igb_clean_rx_ring(struct igb_ring
*rx_ring
)
2115 struct igb_adapter
*adapter
= rx_ring
->adapter
;
2116 struct igb_buffer
*buffer_info
;
2117 struct pci_dev
*pdev
= adapter
->pdev
;
2121 if (!rx_ring
->buffer_info
)
2123 /* Free all the Rx ring sk_buffs */
2124 for (i
= 0; i
< rx_ring
->count
; i
++) {
2125 buffer_info
= &rx_ring
->buffer_info
[i
];
2126 if (buffer_info
->dma
) {
2127 if (adapter
->rx_ps_hdr_size
)
2128 pci_unmap_single(pdev
, buffer_info
->dma
,
2129 adapter
->rx_ps_hdr_size
,
2130 PCI_DMA_FROMDEVICE
);
2132 pci_unmap_single(pdev
, buffer_info
->dma
,
2133 adapter
->rx_buffer_len
,
2134 PCI_DMA_FROMDEVICE
);
2135 buffer_info
->dma
= 0;
2138 if (buffer_info
->skb
) {
2139 dev_kfree_skb(buffer_info
->skb
);
2140 buffer_info
->skb
= NULL
;
2142 if (buffer_info
->page
) {
2143 if (buffer_info
->page_dma
)
2144 pci_unmap_page(pdev
, buffer_info
->page_dma
,
2146 PCI_DMA_FROMDEVICE
);
2147 put_page(buffer_info
->page
);
2148 buffer_info
->page
= NULL
;
2149 buffer_info
->page_dma
= 0;
2150 buffer_info
->page_offset
= 0;
2154 size
= sizeof(struct igb_buffer
) * rx_ring
->count
;
2155 memset(rx_ring
->buffer_info
, 0, size
);
2157 /* Zero out the descriptor ring */
2158 memset(rx_ring
->desc
, 0, rx_ring
->size
);
2160 rx_ring
->next_to_clean
= 0;
2161 rx_ring
->next_to_use
= 0;
2163 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->head
);
2164 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
2168 * igb_clean_all_rx_rings - Free Rx Buffers for all queues
2169 * @adapter: board private structure
2171 static void igb_clean_all_rx_rings(struct igb_adapter
*adapter
)
2175 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2176 igb_clean_rx_ring(&adapter
->rx_ring
[i
]);
2180 * igb_set_mac - Change the Ethernet Address of the NIC
2181 * @netdev: network interface device structure
2182 * @p: pointer to an address structure
2184 * Returns 0 on success, negative on failure
2186 static int igb_set_mac(struct net_device
*netdev
, void *p
)
2188 struct igb_adapter
*adapter
= netdev_priv(netdev
);
2189 struct sockaddr
*addr
= p
;
2191 if (!is_valid_ether_addr(addr
->sa_data
))
2192 return -EADDRNOTAVAIL
;
2194 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
2195 memcpy(adapter
->hw
.mac
.addr
, addr
->sa_data
, netdev
->addr_len
);
2197 adapter
->hw
.mac
.ops
.rar_set(&adapter
->hw
, adapter
->hw
.mac
.addr
, 0);
2203 * igb_set_multi - Multicast and Promiscuous mode set
2204 * @netdev: network interface device structure
2206 * The set_multi entry point is called whenever the multicast address
2207 * list or the network interface flags are updated. This routine is
2208 * responsible for configuring the hardware for proper multicast,
2209 * promiscuous mode, and all-multi behavior.
2211 static void igb_set_multi(struct net_device
*netdev
)
2213 struct igb_adapter
*adapter
= netdev_priv(netdev
);
2214 struct e1000_hw
*hw
= &adapter
->hw
;
2215 struct e1000_mac_info
*mac
= &hw
->mac
;
2216 struct dev_mc_list
*mc_ptr
;
2221 /* Check for Promiscuous and All Multicast modes */
2223 rctl
= rd32(E1000_RCTL
);
2225 if (netdev
->flags
& IFF_PROMISC
) {
2226 rctl
|= (E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2227 rctl
&= ~E1000_RCTL_VFE
;
2229 if (netdev
->flags
& IFF_ALLMULTI
) {
2230 rctl
|= E1000_RCTL_MPE
;
2231 rctl
&= ~E1000_RCTL_UPE
;
2233 rctl
&= ~(E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2234 rctl
|= E1000_RCTL_VFE
;
2236 wr32(E1000_RCTL
, rctl
);
2238 if (!netdev
->mc_count
) {
2239 /* nothing to program, so clear mc list */
2240 igb_update_mc_addr_list_82575(hw
, NULL
, 0, 1,
2241 mac
->rar_entry_count
);
2245 mta_list
= kzalloc(netdev
->mc_count
* 6, GFP_ATOMIC
);
2249 /* The shared function expects a packed array of only addresses. */
2250 mc_ptr
= netdev
->mc_list
;
2252 for (i
= 0; i
< netdev
->mc_count
; i
++) {
2255 memcpy(mta_list
+ (i
*ETH_ALEN
), mc_ptr
->dmi_addr
, ETH_ALEN
);
2256 mc_ptr
= mc_ptr
->next
;
2258 igb_update_mc_addr_list_82575(hw
, mta_list
, i
, 1,
2259 mac
->rar_entry_count
);
2263 /* Need to wait a few seconds after link up to get diagnostic information from
2265 static void igb_update_phy_info(unsigned long data
)
2267 struct igb_adapter
*adapter
= (struct igb_adapter
*) data
;
2268 if (adapter
->hw
.phy
.ops
.get_phy_info
)
2269 adapter
->hw
.phy
.ops
.get_phy_info(&adapter
->hw
);
2273 * igb_watchdog - Timer Call-back
2274 * @data: pointer to adapter cast into an unsigned long
2276 static void igb_watchdog(unsigned long data
)
2278 struct igb_adapter
*adapter
= (struct igb_adapter
*)data
;
2279 /* Do the rest outside of interrupt context */
2280 schedule_work(&adapter
->watchdog_task
);
2283 static void igb_watchdog_task(struct work_struct
*work
)
2285 struct igb_adapter
*adapter
= container_of(work
,
2286 struct igb_adapter
, watchdog_task
);
2287 struct e1000_hw
*hw
= &adapter
->hw
;
2289 struct net_device
*netdev
= adapter
->netdev
;
2290 struct igb_ring
*tx_ring
= adapter
->tx_ring
;
2291 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
2297 if ((netif_carrier_ok(netdev
)) &&
2298 (rd32(E1000_STATUS
) & E1000_STATUS_LU
))
2301 ret_val
= hw
->mac
.ops
.check_for_link(&adapter
->hw
);
2302 if ((ret_val
== E1000_ERR_PHY
) &&
2303 (hw
->phy
.type
== e1000_phy_igp_3
) &&
2305 E1000_PHY_CTRL_GBE_DISABLE
))
2306 dev_info(&adapter
->pdev
->dev
,
2307 "Gigabit has been disabled, downgrading speed\n");
2309 if ((hw
->phy
.media_type
== e1000_media_type_internal_serdes
) &&
2310 !(rd32(E1000_TXCW
) & E1000_TXCW_ANE
))
2311 link
= mac
->serdes_has_link
;
2313 link
= rd32(E1000_STATUS
) &
2317 if (!netif_carrier_ok(netdev
)) {
2319 hw
->mac
.ops
.get_speed_and_duplex(&adapter
->hw
,
2320 &adapter
->link_speed
,
2321 &adapter
->link_duplex
);
2323 ctrl
= rd32(E1000_CTRL
);
2324 dev_info(&adapter
->pdev
->dev
,
2325 "NIC Link is Up %d Mbps %s, "
2326 "Flow Control: %s\n",
2327 adapter
->link_speed
,
2328 adapter
->link_duplex
== FULL_DUPLEX
?
2329 "Full Duplex" : "Half Duplex",
2330 ((ctrl
& E1000_CTRL_TFCE
) && (ctrl
&
2331 E1000_CTRL_RFCE
)) ? "RX/TX" : ((ctrl
&
2332 E1000_CTRL_RFCE
) ? "RX" : ((ctrl
&
2333 E1000_CTRL_TFCE
) ? "TX" : "None")));
2335 /* tweak tx_queue_len according to speed/duplex and
2336 * adjust the timeout factor */
2337 netdev
->tx_queue_len
= adapter
->tx_queue_len
;
2338 adapter
->tx_timeout_factor
= 1;
2339 switch (adapter
->link_speed
) {
2341 netdev
->tx_queue_len
= 10;
2342 adapter
->tx_timeout_factor
= 14;
2345 netdev
->tx_queue_len
= 100;
2346 /* maybe add some timeout factor ? */
2350 netif_carrier_on(netdev
);
2351 netif_tx_wake_all_queues(netdev
);
2353 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
2354 mod_timer(&adapter
->phy_info_timer
,
2355 round_jiffies(jiffies
+ 2 * HZ
));
2358 if (netif_carrier_ok(netdev
)) {
2359 adapter
->link_speed
= 0;
2360 adapter
->link_duplex
= 0;
2361 dev_info(&adapter
->pdev
->dev
, "NIC Link is Down\n");
2362 netif_carrier_off(netdev
);
2363 netif_tx_stop_all_queues(netdev
);
2364 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
2365 mod_timer(&adapter
->phy_info_timer
,
2366 round_jiffies(jiffies
+ 2 * HZ
));
2371 igb_update_stats(adapter
);
2373 mac
->tx_packet_delta
= adapter
->stats
.tpt
- adapter
->tpt_old
;
2374 adapter
->tpt_old
= adapter
->stats
.tpt
;
2375 mac
->collision_delta
= adapter
->stats
.colc
- adapter
->colc_old
;
2376 adapter
->colc_old
= adapter
->stats
.colc
;
2378 adapter
->gorc
= adapter
->stats
.gorc
- adapter
->gorc_old
;
2379 adapter
->gorc_old
= adapter
->stats
.gorc
;
2380 adapter
->gotc
= adapter
->stats
.gotc
- adapter
->gotc_old
;
2381 adapter
->gotc_old
= adapter
->stats
.gotc
;
2383 igb_update_adaptive(&adapter
->hw
);
2385 if (!netif_carrier_ok(netdev
)) {
2386 if (IGB_DESC_UNUSED(tx_ring
) + 1 < tx_ring
->count
) {
2387 /* We've lost link, so the controller stops DMA,
2388 * but we've got queued Tx work that's never going
2389 * to get done, so reset controller to flush Tx.
2390 * (Do the reset outside of interrupt context). */
2391 adapter
->tx_timeout_count
++;
2392 schedule_work(&adapter
->reset_task
);
2396 /* Cause software interrupt to ensure rx ring is cleaned */
2397 if (adapter
->msix_entries
) {
2398 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2399 eics
|= adapter
->rx_ring
[i
].eims_value
;
2400 wr32(E1000_EICS
, eics
);
2402 wr32(E1000_ICS
, E1000_ICS_RXDMT0
);
2405 /* Force detection of hung controller every watchdog period */
2406 tx_ring
->detect_tx_hung
= true;
2408 /* Reset the timer */
2409 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
2410 mod_timer(&adapter
->watchdog_timer
,
2411 round_jiffies(jiffies
+ 2 * HZ
));
2414 enum latency_range
{
2418 latency_invalid
= 255
2423 * igb_update_ring_itr - update the dynamic ITR value based on packet size
2425 * Stores a new ITR value based on strictly on packet size. This
2426 * algorithm is less sophisticated than that used in igb_update_itr,
2427 * due to the difficulty of synchronizing statistics across multiple
2428 * receive rings. The divisors and thresholds used by this fuction
2429 * were determined based on theoretical maximum wire speed and testing
2430 * data, in order to minimize response time while increasing bulk
2432 * This functionality is controlled by the InterruptThrottleRate module
2433 * parameter (see igb_param.c)
2434 * NOTE: This function is called only when operating in a multiqueue
2435 * receive environment.
2436 * @rx_ring: pointer to ring
2438 static void igb_update_ring_itr(struct igb_ring
*rx_ring
)
2440 int new_val
= rx_ring
->itr_val
;
2441 int avg_wire_size
= 0;
2442 struct igb_adapter
*adapter
= rx_ring
->adapter
;
2444 if (!rx_ring
->total_packets
)
2445 goto clear_counts
; /* no packets, so don't do anything */
2447 /* For non-gigabit speeds, just fix the interrupt rate at 4000
2448 * ints/sec - ITR timer value of 120 ticks.
2450 if (adapter
->link_speed
!= SPEED_1000
) {
2454 avg_wire_size
= rx_ring
->total_bytes
/ rx_ring
->total_packets
;
2456 /* Add 24 bytes to size to account for CRC, preamble, and gap */
2457 avg_wire_size
+= 24;
2459 /* Don't starve jumbo frames */
2460 avg_wire_size
= min(avg_wire_size
, 3000);
2462 /* Give a little boost to mid-size frames */
2463 if ((avg_wire_size
> 300) && (avg_wire_size
< 1200))
2464 new_val
= avg_wire_size
/ 3;
2466 new_val
= avg_wire_size
/ 2;
2469 if (new_val
!= rx_ring
->itr_val
) {
2470 rx_ring
->itr_val
= new_val
;
2471 rx_ring
->set_itr
= 1;
2474 rx_ring
->total_bytes
= 0;
2475 rx_ring
->total_packets
= 0;
2479 * igb_update_itr - update the dynamic ITR value based on statistics
2480 * Stores a new ITR value based on packets and byte
2481 * counts during the last interrupt. The advantage of per interrupt
2482 * computation is faster updates and more accurate ITR for the current
2483 * traffic pattern. Constants in this function were computed
2484 * based on theoretical maximum wire speed and thresholds were set based
2485 * on testing data as well as attempting to minimize response time
2486 * while increasing bulk throughput.
2487 * this functionality is controlled by the InterruptThrottleRate module
2488 * parameter (see igb_param.c)
2489 * NOTE: These calculations are only valid when operating in a single-
2490 * queue environment.
2491 * @adapter: pointer to adapter
2492 * @itr_setting: current adapter->itr
2493 * @packets: the number of packets during this measurement interval
2494 * @bytes: the number of bytes during this measurement interval
2496 static unsigned int igb_update_itr(struct igb_adapter
*adapter
, u16 itr_setting
,
2497 int packets
, int bytes
)
2499 unsigned int retval
= itr_setting
;
2502 goto update_itr_done
;
2504 switch (itr_setting
) {
2505 case lowest_latency
:
2506 /* handle TSO and jumbo frames */
2507 if (bytes
/packets
> 8000)
2508 retval
= bulk_latency
;
2509 else if ((packets
< 5) && (bytes
> 512))
2510 retval
= low_latency
;
2512 case low_latency
: /* 50 usec aka 20000 ints/s */
2513 if (bytes
> 10000) {
2514 /* this if handles the TSO accounting */
2515 if (bytes
/packets
> 8000) {
2516 retval
= bulk_latency
;
2517 } else if ((packets
< 10) || ((bytes
/packets
) > 1200)) {
2518 retval
= bulk_latency
;
2519 } else if ((packets
> 35)) {
2520 retval
= lowest_latency
;
2522 } else if (bytes
/packets
> 2000) {
2523 retval
= bulk_latency
;
2524 } else if (packets
<= 2 && bytes
< 512) {
2525 retval
= lowest_latency
;
2528 case bulk_latency
: /* 250 usec aka 4000 ints/s */
2529 if (bytes
> 25000) {
2531 retval
= low_latency
;
2532 } else if (bytes
< 6000) {
2533 retval
= low_latency
;
2542 static void igb_set_itr(struct igb_adapter
*adapter
)
2545 u32 new_itr
= adapter
->itr
;
2547 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2548 if (adapter
->link_speed
!= SPEED_1000
) {
2554 adapter
->rx_itr
= igb_update_itr(adapter
,
2556 adapter
->rx_ring
->total_packets
,
2557 adapter
->rx_ring
->total_bytes
);
2559 if (adapter
->rx_ring
->buddy
) {
2560 adapter
->tx_itr
= igb_update_itr(adapter
,
2562 adapter
->tx_ring
->total_packets
,
2563 adapter
->tx_ring
->total_bytes
);
2565 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
2567 current_itr
= adapter
->rx_itr
;
2570 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2571 if (adapter
->itr_setting
== 3 &&
2572 current_itr
== lowest_latency
)
2573 current_itr
= low_latency
;
2575 switch (current_itr
) {
2576 /* counts and packets in update_itr are dependent on these numbers */
2577 case lowest_latency
:
2581 new_itr
= 20000; /* aka hwitr = ~200 */
2591 adapter
->rx_ring
->total_bytes
= 0;
2592 adapter
->rx_ring
->total_packets
= 0;
2593 if (adapter
->rx_ring
->buddy
) {
2594 adapter
->rx_ring
->buddy
->total_bytes
= 0;
2595 adapter
->rx_ring
->buddy
->total_packets
= 0;
2598 if (new_itr
!= adapter
->itr
) {
2599 /* this attempts to bias the interrupt rate towards Bulk
2600 * by adding intermediate steps when interrupt rate is
2602 new_itr
= new_itr
> adapter
->itr
?
2603 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
2605 /* Don't write the value here; it resets the adapter's
2606 * internal timer, and causes us to delay far longer than
2607 * we should between interrupts. Instead, we write the ITR
2608 * value at the beginning of the next interrupt so the timing
2609 * ends up being correct.
2611 adapter
->itr
= new_itr
;
2612 adapter
->rx_ring
->itr_val
= 1000000000 / (new_itr
* 256);
2613 adapter
->rx_ring
->set_itr
= 1;
2620 #define IGB_TX_FLAGS_CSUM 0x00000001
2621 #define IGB_TX_FLAGS_VLAN 0x00000002
2622 #define IGB_TX_FLAGS_TSO 0x00000004
2623 #define IGB_TX_FLAGS_IPV4 0x00000008
2624 #define IGB_TX_FLAGS_VLAN_MASK 0xffff0000
2625 #define IGB_TX_FLAGS_VLAN_SHIFT 16
2627 static inline int igb_tso_adv(struct igb_adapter
*adapter
,
2628 struct igb_ring
*tx_ring
,
2629 struct sk_buff
*skb
, u32 tx_flags
, u8
*hdr_len
)
2631 struct e1000_adv_tx_context_desc
*context_desc
;
2634 struct igb_buffer
*buffer_info
;
2635 u32 info
= 0, tu_cmd
= 0;
2636 u32 mss_l4len_idx
, l4len
;
2639 if (skb_header_cloned(skb
)) {
2640 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
2645 l4len
= tcp_hdrlen(skb
);
2648 if (skb
->protocol
== htons(ETH_P_IP
)) {
2649 struct iphdr
*iph
= ip_hdr(skb
);
2652 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
2656 } else if (skb_shinfo(skb
)->gso_type
== SKB_GSO_TCPV6
) {
2657 ipv6_hdr(skb
)->payload_len
= 0;
2658 tcp_hdr(skb
)->check
= ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
2659 &ipv6_hdr(skb
)->daddr
,
2663 i
= tx_ring
->next_to_use
;
2665 buffer_info
= &tx_ring
->buffer_info
[i
];
2666 context_desc
= E1000_TX_CTXTDESC_ADV(*tx_ring
, i
);
2667 /* VLAN MACLEN IPLEN */
2668 if (tx_flags
& IGB_TX_FLAGS_VLAN
)
2669 info
|= (tx_flags
& IGB_TX_FLAGS_VLAN_MASK
);
2670 info
|= (skb_network_offset(skb
) << E1000_ADVTXD_MACLEN_SHIFT
);
2671 *hdr_len
+= skb_network_offset(skb
);
2672 info
|= skb_network_header_len(skb
);
2673 *hdr_len
+= skb_network_header_len(skb
);
2674 context_desc
->vlan_macip_lens
= cpu_to_le32(info
);
2676 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2677 tu_cmd
|= (E1000_TXD_CMD_DEXT
| E1000_ADVTXD_DTYP_CTXT
);
2679 if (skb
->protocol
== htons(ETH_P_IP
))
2680 tu_cmd
|= E1000_ADVTXD_TUCMD_IPV4
;
2681 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
2683 context_desc
->type_tucmd_mlhl
= cpu_to_le32(tu_cmd
);
2686 mss_l4len_idx
= (skb_shinfo(skb
)->gso_size
<< E1000_ADVTXD_MSS_SHIFT
);
2687 mss_l4len_idx
|= (l4len
<< E1000_ADVTXD_L4LEN_SHIFT
);
2689 /* Context index must be unique per ring. */
2690 if (adapter
->flags
& IGB_FLAG_NEED_CTX_IDX
)
2691 mss_l4len_idx
|= tx_ring
->queue_index
<< 4;
2693 context_desc
->mss_l4len_idx
= cpu_to_le32(mss_l4len_idx
);
2694 context_desc
->seqnum_seed
= 0;
2696 buffer_info
->time_stamp
= jiffies
;
2697 buffer_info
->dma
= 0;
2699 if (i
== tx_ring
->count
)
2702 tx_ring
->next_to_use
= i
;
2707 static inline bool igb_tx_csum_adv(struct igb_adapter
*adapter
,
2708 struct igb_ring
*tx_ring
,
2709 struct sk_buff
*skb
, u32 tx_flags
)
2711 struct e1000_adv_tx_context_desc
*context_desc
;
2713 struct igb_buffer
*buffer_info
;
2714 u32 info
= 0, tu_cmd
= 0;
2716 if ((skb
->ip_summed
== CHECKSUM_PARTIAL
) ||
2717 (tx_flags
& IGB_TX_FLAGS_VLAN
)) {
2718 i
= tx_ring
->next_to_use
;
2719 buffer_info
= &tx_ring
->buffer_info
[i
];
2720 context_desc
= E1000_TX_CTXTDESC_ADV(*tx_ring
, i
);
2722 if (tx_flags
& IGB_TX_FLAGS_VLAN
)
2723 info
|= (tx_flags
& IGB_TX_FLAGS_VLAN_MASK
);
2724 info
|= (skb_network_offset(skb
) << E1000_ADVTXD_MACLEN_SHIFT
);
2725 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
2726 info
|= skb_network_header_len(skb
);
2728 context_desc
->vlan_macip_lens
= cpu_to_le32(info
);
2730 tu_cmd
|= (E1000_TXD_CMD_DEXT
| E1000_ADVTXD_DTYP_CTXT
);
2732 if (skb
->ip_summed
== CHECKSUM_PARTIAL
) {
2733 switch (skb
->protocol
) {
2734 case __constant_htons(ETH_P_IP
):
2735 tu_cmd
|= E1000_ADVTXD_TUCMD_IPV4
;
2736 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
2737 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
2739 case __constant_htons(ETH_P_IPV6
):
2740 /* XXX what about other V6 headers?? */
2741 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
2742 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
2745 if (unlikely(net_ratelimit()))
2746 dev_warn(&adapter
->pdev
->dev
,
2747 "partial checksum but proto=%x!\n",
2753 context_desc
->type_tucmd_mlhl
= cpu_to_le32(tu_cmd
);
2754 context_desc
->seqnum_seed
= 0;
2755 if (adapter
->flags
& IGB_FLAG_NEED_CTX_IDX
)
2756 context_desc
->mss_l4len_idx
=
2757 cpu_to_le32(tx_ring
->queue_index
<< 4);
2759 buffer_info
->time_stamp
= jiffies
;
2760 buffer_info
->dma
= 0;
2763 if (i
== tx_ring
->count
)
2765 tx_ring
->next_to_use
= i
;
2774 #define IGB_MAX_TXD_PWR 16
2775 #define IGB_MAX_DATA_PER_TXD (1<<IGB_MAX_TXD_PWR)
2777 static inline int igb_tx_map_adv(struct igb_adapter
*adapter
,
2778 struct igb_ring
*tx_ring
,
2779 struct sk_buff
*skb
)
2781 struct igb_buffer
*buffer_info
;
2782 unsigned int len
= skb_headlen(skb
);
2783 unsigned int count
= 0, i
;
2786 i
= tx_ring
->next_to_use
;
2788 buffer_info
= &tx_ring
->buffer_info
[i
];
2789 BUG_ON(len
>= IGB_MAX_DATA_PER_TXD
);
2790 buffer_info
->length
= len
;
2791 /* set time_stamp *before* dma to help avoid a possible race */
2792 buffer_info
->time_stamp
= jiffies
;
2793 buffer_info
->dma
= pci_map_single(adapter
->pdev
, skb
->data
, len
,
2797 if (i
== tx_ring
->count
)
2800 for (f
= 0; f
< skb_shinfo(skb
)->nr_frags
; f
++) {
2801 struct skb_frag_struct
*frag
;
2803 frag
= &skb_shinfo(skb
)->frags
[f
];
2806 buffer_info
= &tx_ring
->buffer_info
[i
];
2807 BUG_ON(len
>= IGB_MAX_DATA_PER_TXD
);
2808 buffer_info
->length
= len
;
2809 buffer_info
->time_stamp
= jiffies
;
2810 buffer_info
->dma
= pci_map_page(adapter
->pdev
,
2818 if (i
== tx_ring
->count
)
2822 i
= (i
== 0) ? tx_ring
->count
- 1 : i
- 1;
2823 tx_ring
->buffer_info
[i
].skb
= skb
;
2828 static inline void igb_tx_queue_adv(struct igb_adapter
*adapter
,
2829 struct igb_ring
*tx_ring
,
2830 int tx_flags
, int count
, u32 paylen
,
2833 union e1000_adv_tx_desc
*tx_desc
= NULL
;
2834 struct igb_buffer
*buffer_info
;
2835 u32 olinfo_status
= 0, cmd_type_len
;
2838 cmd_type_len
= (E1000_ADVTXD_DTYP_DATA
| E1000_ADVTXD_DCMD_IFCS
|
2839 E1000_ADVTXD_DCMD_DEXT
);
2841 if (tx_flags
& IGB_TX_FLAGS_VLAN
)
2842 cmd_type_len
|= E1000_ADVTXD_DCMD_VLE
;
2844 if (tx_flags
& IGB_TX_FLAGS_TSO
) {
2845 cmd_type_len
|= E1000_ADVTXD_DCMD_TSE
;
2847 /* insert tcp checksum */
2848 olinfo_status
|= E1000_TXD_POPTS_TXSM
<< 8;
2850 /* insert ip checksum */
2851 if (tx_flags
& IGB_TX_FLAGS_IPV4
)
2852 olinfo_status
|= E1000_TXD_POPTS_IXSM
<< 8;
2854 } else if (tx_flags
& IGB_TX_FLAGS_CSUM
) {
2855 olinfo_status
|= E1000_TXD_POPTS_TXSM
<< 8;
2858 if ((adapter
->flags
& IGB_FLAG_NEED_CTX_IDX
) &&
2859 (tx_flags
& (IGB_TX_FLAGS_CSUM
| IGB_TX_FLAGS_TSO
|
2860 IGB_TX_FLAGS_VLAN
)))
2861 olinfo_status
|= tx_ring
->queue_index
<< 4;
2863 olinfo_status
|= ((paylen
- hdr_len
) << E1000_ADVTXD_PAYLEN_SHIFT
);
2865 i
= tx_ring
->next_to_use
;
2867 buffer_info
= &tx_ring
->buffer_info
[i
];
2868 tx_desc
= E1000_TX_DESC_ADV(*tx_ring
, i
);
2869 tx_desc
->read
.buffer_addr
= cpu_to_le64(buffer_info
->dma
);
2870 tx_desc
->read
.cmd_type_len
=
2871 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
2872 tx_desc
->read
.olinfo_status
= cpu_to_le32(olinfo_status
);
2874 if (i
== tx_ring
->count
)
2878 tx_desc
->read
.cmd_type_len
|= cpu_to_le32(adapter
->txd_cmd
);
2879 /* Force memory writes to complete before letting h/w
2880 * know there are new descriptors to fetch. (Only
2881 * applicable for weak-ordered memory model archs,
2882 * such as IA-64). */
2885 tx_ring
->next_to_use
= i
;
2886 writel(i
, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
2887 /* we need this if more than one processor can write to our tail
2888 * at a time, it syncronizes IO on IA64/Altix systems */
2892 static int __igb_maybe_stop_tx(struct net_device
*netdev
,
2893 struct igb_ring
*tx_ring
, int size
)
2895 struct igb_adapter
*adapter
= netdev_priv(netdev
);
2897 netif_stop_subqueue(netdev
, tx_ring
->queue_index
);
2899 /* Herbert's original patch had:
2900 * smp_mb__after_netif_stop_queue();
2901 * but since that doesn't exist yet, just open code it. */
2904 /* We need to check again in a case another CPU has just
2905 * made room available. */
2906 if (IGB_DESC_UNUSED(tx_ring
) < size
)
2910 netif_wake_subqueue(netdev
, tx_ring
->queue_index
);
2911 ++adapter
->restart_queue
;
2915 static int igb_maybe_stop_tx(struct net_device
*netdev
,
2916 struct igb_ring
*tx_ring
, int size
)
2918 if (IGB_DESC_UNUSED(tx_ring
) >= size
)
2920 return __igb_maybe_stop_tx(netdev
, tx_ring
, size
);
2923 #define TXD_USE_COUNT(S) (((S) >> (IGB_MAX_TXD_PWR)) + 1)
2925 static int igb_xmit_frame_ring_adv(struct sk_buff
*skb
,
2926 struct net_device
*netdev
,
2927 struct igb_ring
*tx_ring
)
2929 struct igb_adapter
*adapter
= netdev_priv(netdev
);
2930 unsigned int tx_flags
= 0;
2935 len
= skb_headlen(skb
);
2937 if (test_bit(__IGB_DOWN
, &adapter
->state
)) {
2938 dev_kfree_skb_any(skb
);
2939 return NETDEV_TX_OK
;
2942 if (skb
->len
<= 0) {
2943 dev_kfree_skb_any(skb
);
2944 return NETDEV_TX_OK
;
2947 /* need: 1 descriptor per page,
2948 * + 2 desc gap to keep tail from touching head,
2949 * + 1 desc for skb->data,
2950 * + 1 desc for context descriptor,
2951 * otherwise try next time */
2952 if (igb_maybe_stop_tx(netdev
, tx_ring
, skb_shinfo(skb
)->nr_frags
+ 4)) {
2953 /* this is a hard error */
2954 return NETDEV_TX_BUSY
;
2958 if (adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
2959 tx_flags
|= IGB_TX_FLAGS_VLAN
;
2960 tx_flags
|= (vlan_tx_tag_get(skb
) << IGB_TX_FLAGS_VLAN_SHIFT
);
2963 if (skb
->protocol
== htons(ETH_P_IP
))
2964 tx_flags
|= IGB_TX_FLAGS_IPV4
;
2966 tso
= skb_is_gso(skb
) ? igb_tso_adv(adapter
, tx_ring
, skb
, tx_flags
,
2970 dev_kfree_skb_any(skb
);
2971 return NETDEV_TX_OK
;
2975 tx_flags
|= IGB_TX_FLAGS_TSO
;
2976 else if (igb_tx_csum_adv(adapter
, tx_ring
, skb
, tx_flags
))
2977 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
2978 tx_flags
|= IGB_TX_FLAGS_CSUM
;
2980 igb_tx_queue_adv(adapter
, tx_ring
, tx_flags
,
2981 igb_tx_map_adv(adapter
, tx_ring
, skb
),
2984 netdev
->trans_start
= jiffies
;
2986 /* Make sure there is space in the ring for the next send. */
2987 igb_maybe_stop_tx(netdev
, tx_ring
, MAX_SKB_FRAGS
+ 4);
2989 return NETDEV_TX_OK
;
2992 static int igb_xmit_frame_adv(struct sk_buff
*skb
, struct net_device
*netdev
)
2994 struct igb_adapter
*adapter
= netdev_priv(netdev
);
2995 struct igb_ring
*tx_ring
;
2998 r_idx
= skb
->queue_mapping
& (IGB_MAX_TX_QUEUES
- 1);
2999 tx_ring
= adapter
->multi_tx_table
[r_idx
];
3001 /* This goes back to the question of how to logically map a tx queue
3002 * to a flow. Right now, performance is impacted slightly negatively
3003 * if using multiple tx queues. If the stack breaks away from a
3004 * single qdisc implementation, we can look at this again. */
3005 return (igb_xmit_frame_ring_adv(skb
, netdev
, tx_ring
));
3009 * igb_tx_timeout - Respond to a Tx Hang
3010 * @netdev: network interface device structure
3012 static void igb_tx_timeout(struct net_device
*netdev
)
3014 struct igb_adapter
*adapter
= netdev_priv(netdev
);
3015 struct e1000_hw
*hw
= &adapter
->hw
;
3017 /* Do the reset outside of interrupt context */
3018 adapter
->tx_timeout_count
++;
3019 schedule_work(&adapter
->reset_task
);
3020 wr32(E1000_EICS
, adapter
->eims_enable_mask
&
3021 ~(E1000_EIMS_TCP_TIMER
| E1000_EIMS_OTHER
));
3024 static void igb_reset_task(struct work_struct
*work
)
3026 struct igb_adapter
*adapter
;
3027 adapter
= container_of(work
, struct igb_adapter
, reset_task
);
3029 igb_reinit_locked(adapter
);
3033 * igb_get_stats - Get System Network Statistics
3034 * @netdev: network interface device structure
3036 * Returns the address of the device statistics structure.
3037 * The statistics are actually updated from the timer callback.
3039 static struct net_device_stats
*
3040 igb_get_stats(struct net_device
*netdev
)
3042 struct igb_adapter
*adapter
= netdev_priv(netdev
);
3044 /* only return the current stats */
3045 return &adapter
->net_stats
;
3049 * igb_change_mtu - Change the Maximum Transfer Unit
3050 * @netdev: network interface device structure
3051 * @new_mtu: new value for maximum frame size
3053 * Returns 0 on success, negative on failure
3055 static int igb_change_mtu(struct net_device
*netdev
, int new_mtu
)
3057 struct igb_adapter
*adapter
= netdev_priv(netdev
);
3058 int max_frame
= new_mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
3060 if ((max_frame
< ETH_ZLEN
+ ETH_FCS_LEN
) ||
3061 (max_frame
> MAX_JUMBO_FRAME_SIZE
)) {
3062 dev_err(&adapter
->pdev
->dev
, "Invalid MTU setting\n");
3066 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3067 if (max_frame
> MAX_STD_JUMBO_FRAME_SIZE
) {
3068 dev_err(&adapter
->pdev
->dev
, "MTU > 9216 not supported.\n");
3072 while (test_and_set_bit(__IGB_RESETTING
, &adapter
->state
))
3074 /* igb_down has a dependency on max_frame_size */
3075 adapter
->max_frame_size
= max_frame
;
3076 if (netif_running(netdev
))
3079 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3080 * means we reserve 2 more, this pushes us to allocate from the next
3082 * i.e. RXBUFFER_2048 --> size-4096 slab
3085 if (max_frame
<= IGB_RXBUFFER_256
)
3086 adapter
->rx_buffer_len
= IGB_RXBUFFER_256
;
3087 else if (max_frame
<= IGB_RXBUFFER_512
)
3088 adapter
->rx_buffer_len
= IGB_RXBUFFER_512
;
3089 else if (max_frame
<= IGB_RXBUFFER_1024
)
3090 adapter
->rx_buffer_len
= IGB_RXBUFFER_1024
;
3091 else if (max_frame
<= IGB_RXBUFFER_2048
)
3092 adapter
->rx_buffer_len
= IGB_RXBUFFER_2048
;
3094 #if (PAGE_SIZE / 2) > IGB_RXBUFFER_16384
3095 adapter
->rx_buffer_len
= IGB_RXBUFFER_16384
;
3097 adapter
->rx_buffer_len
= PAGE_SIZE
/ 2;
3099 /* adjust allocation if LPE protects us, and we aren't using SBP */
3100 if ((max_frame
== ETH_FRAME_LEN
+ ETH_FCS_LEN
) ||
3101 (max_frame
== MAXIMUM_ETHERNET_VLAN_SIZE
))
3102 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
3104 dev_info(&adapter
->pdev
->dev
, "changing MTU from %d to %d\n",
3105 netdev
->mtu
, new_mtu
);
3106 netdev
->mtu
= new_mtu
;
3108 if (netif_running(netdev
))
3113 clear_bit(__IGB_RESETTING
, &adapter
->state
);
3119 * igb_update_stats - Update the board statistics counters
3120 * @adapter: board private structure
3123 void igb_update_stats(struct igb_adapter
*adapter
)
3125 struct e1000_hw
*hw
= &adapter
->hw
;
3126 struct pci_dev
*pdev
= adapter
->pdev
;
3129 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3132 * Prevent stats update while adapter is being reset, or if the pci
3133 * connection is down.
3135 if (adapter
->link_speed
== 0)
3137 if (pci_channel_offline(pdev
))
3140 adapter
->stats
.crcerrs
+= rd32(E1000_CRCERRS
);
3141 adapter
->stats
.gprc
+= rd32(E1000_GPRC
);
3142 adapter
->stats
.gorc
+= rd32(E1000_GORCL
);
3143 rd32(E1000_GORCH
); /* clear GORCL */
3144 adapter
->stats
.bprc
+= rd32(E1000_BPRC
);
3145 adapter
->stats
.mprc
+= rd32(E1000_MPRC
);
3146 adapter
->stats
.roc
+= rd32(E1000_ROC
);
3148 adapter
->stats
.prc64
+= rd32(E1000_PRC64
);
3149 adapter
->stats
.prc127
+= rd32(E1000_PRC127
);
3150 adapter
->stats
.prc255
+= rd32(E1000_PRC255
);
3151 adapter
->stats
.prc511
+= rd32(E1000_PRC511
);
3152 adapter
->stats
.prc1023
+= rd32(E1000_PRC1023
);
3153 adapter
->stats
.prc1522
+= rd32(E1000_PRC1522
);
3154 adapter
->stats
.symerrs
+= rd32(E1000_SYMERRS
);
3155 adapter
->stats
.sec
+= rd32(E1000_SEC
);
3157 adapter
->stats
.mpc
+= rd32(E1000_MPC
);
3158 adapter
->stats
.scc
+= rd32(E1000_SCC
);
3159 adapter
->stats
.ecol
+= rd32(E1000_ECOL
);
3160 adapter
->stats
.mcc
+= rd32(E1000_MCC
);
3161 adapter
->stats
.latecol
+= rd32(E1000_LATECOL
);
3162 adapter
->stats
.dc
+= rd32(E1000_DC
);
3163 adapter
->stats
.rlec
+= rd32(E1000_RLEC
);
3164 adapter
->stats
.xonrxc
+= rd32(E1000_XONRXC
);
3165 adapter
->stats
.xontxc
+= rd32(E1000_XONTXC
);
3166 adapter
->stats
.xoffrxc
+= rd32(E1000_XOFFRXC
);
3167 adapter
->stats
.xofftxc
+= rd32(E1000_XOFFTXC
);
3168 adapter
->stats
.fcruc
+= rd32(E1000_FCRUC
);
3169 adapter
->stats
.gptc
+= rd32(E1000_GPTC
);
3170 adapter
->stats
.gotc
+= rd32(E1000_GOTCL
);
3171 rd32(E1000_GOTCH
); /* clear GOTCL */
3172 adapter
->stats
.rnbc
+= rd32(E1000_RNBC
);
3173 adapter
->stats
.ruc
+= rd32(E1000_RUC
);
3174 adapter
->stats
.rfc
+= rd32(E1000_RFC
);
3175 adapter
->stats
.rjc
+= rd32(E1000_RJC
);
3176 adapter
->stats
.tor
+= rd32(E1000_TORH
);
3177 adapter
->stats
.tot
+= rd32(E1000_TOTH
);
3178 adapter
->stats
.tpr
+= rd32(E1000_TPR
);
3180 adapter
->stats
.ptc64
+= rd32(E1000_PTC64
);
3181 adapter
->stats
.ptc127
+= rd32(E1000_PTC127
);
3182 adapter
->stats
.ptc255
+= rd32(E1000_PTC255
);
3183 adapter
->stats
.ptc511
+= rd32(E1000_PTC511
);
3184 adapter
->stats
.ptc1023
+= rd32(E1000_PTC1023
);
3185 adapter
->stats
.ptc1522
+= rd32(E1000_PTC1522
);
3187 adapter
->stats
.mptc
+= rd32(E1000_MPTC
);
3188 adapter
->stats
.bptc
+= rd32(E1000_BPTC
);
3190 /* used for adaptive IFS */
3192 hw
->mac
.tx_packet_delta
= rd32(E1000_TPT
);
3193 adapter
->stats
.tpt
+= hw
->mac
.tx_packet_delta
;
3194 hw
->mac
.collision_delta
= rd32(E1000_COLC
);
3195 adapter
->stats
.colc
+= hw
->mac
.collision_delta
;
3197 adapter
->stats
.algnerrc
+= rd32(E1000_ALGNERRC
);
3198 adapter
->stats
.rxerrc
+= rd32(E1000_RXERRC
);
3199 adapter
->stats
.tncrs
+= rd32(E1000_TNCRS
);
3200 adapter
->stats
.tsctc
+= rd32(E1000_TSCTC
);
3201 adapter
->stats
.tsctfc
+= rd32(E1000_TSCTFC
);
3203 adapter
->stats
.iac
+= rd32(E1000_IAC
);
3204 adapter
->stats
.icrxoc
+= rd32(E1000_ICRXOC
);
3205 adapter
->stats
.icrxptc
+= rd32(E1000_ICRXPTC
);
3206 adapter
->stats
.icrxatc
+= rd32(E1000_ICRXATC
);
3207 adapter
->stats
.ictxptc
+= rd32(E1000_ICTXPTC
);
3208 adapter
->stats
.ictxatc
+= rd32(E1000_ICTXATC
);
3209 adapter
->stats
.ictxqec
+= rd32(E1000_ICTXQEC
);
3210 adapter
->stats
.ictxqmtc
+= rd32(E1000_ICTXQMTC
);
3211 adapter
->stats
.icrxdmtc
+= rd32(E1000_ICRXDMTC
);
3213 /* Fill out the OS statistics structure */
3214 adapter
->net_stats
.multicast
= adapter
->stats
.mprc
;
3215 adapter
->net_stats
.collisions
= adapter
->stats
.colc
;
3219 /* RLEC on some newer hardware can be incorrect so build
3220 * our own version based on RUC and ROC */
3221 adapter
->net_stats
.rx_errors
= adapter
->stats
.rxerrc
+
3222 adapter
->stats
.crcerrs
+ adapter
->stats
.algnerrc
+
3223 adapter
->stats
.ruc
+ adapter
->stats
.roc
+
3224 adapter
->stats
.cexterr
;
3225 adapter
->net_stats
.rx_length_errors
= adapter
->stats
.ruc
+
3227 adapter
->net_stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
3228 adapter
->net_stats
.rx_frame_errors
= adapter
->stats
.algnerrc
;
3229 adapter
->net_stats
.rx_missed_errors
= adapter
->stats
.mpc
;
3232 adapter
->net_stats
.tx_errors
= adapter
->stats
.ecol
+
3233 adapter
->stats
.latecol
;
3234 adapter
->net_stats
.tx_aborted_errors
= adapter
->stats
.ecol
;
3235 adapter
->net_stats
.tx_window_errors
= adapter
->stats
.latecol
;
3236 adapter
->net_stats
.tx_carrier_errors
= adapter
->stats
.tncrs
;
3238 /* Tx Dropped needs to be maintained elsewhere */
3241 if (hw
->phy
.media_type
== e1000_media_type_copper
) {
3242 if ((adapter
->link_speed
== SPEED_1000
) &&
3243 (!hw
->phy
.ops
.read_phy_reg(hw
, PHY_1000T_STATUS
,
3245 phy_tmp
&= PHY_IDLE_ERROR_COUNT_MASK
;
3246 adapter
->phy_stats
.idle_errors
+= phy_tmp
;
3250 /* Management Stats */
3251 adapter
->stats
.mgptc
+= rd32(E1000_MGTPTC
);
3252 adapter
->stats
.mgprc
+= rd32(E1000_MGTPRC
);
3253 adapter
->stats
.mgpdc
+= rd32(E1000_MGTPDC
);
3257 static irqreturn_t
igb_msix_other(int irq
, void *data
)
3259 struct net_device
*netdev
= data
;
3260 struct igb_adapter
*adapter
= netdev_priv(netdev
);
3261 struct e1000_hw
*hw
= &adapter
->hw
;
3262 u32 icr
= rd32(E1000_ICR
);
3264 /* reading ICR causes bit 31 of EICR to be cleared */
3265 if (!(icr
& E1000_ICR_LSC
))
3266 goto no_link_interrupt
;
3267 hw
->mac
.get_link_status
= 1;
3268 /* guard against interrupt when we're going down */
3269 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
3270 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
3273 wr32(E1000_IMS
, E1000_IMS_LSC
);
3274 wr32(E1000_EIMS
, adapter
->eims_other
);
3279 static irqreturn_t
igb_msix_tx(int irq
, void *data
)
3281 struct igb_ring
*tx_ring
= data
;
3282 struct igb_adapter
*adapter
= tx_ring
->adapter
;
3283 struct e1000_hw
*hw
= &adapter
->hw
;
3286 if (adapter
->flags
& IGB_FLAG_DCA_ENABLED
)
3287 igb_update_tx_dca(tx_ring
);
3289 tx_ring
->total_bytes
= 0;
3290 tx_ring
->total_packets
= 0;
3292 /* auto mask will automatically reenable the interrupt when we write
3294 if (!igb_clean_tx_irq(tx_ring
))
3295 /* Ring was not completely cleaned, so fire another interrupt */
3296 wr32(E1000_EICS
, tx_ring
->eims_value
);
3298 wr32(E1000_EIMS
, tx_ring
->eims_value
);
3303 static void igb_write_itr(struct igb_ring
*ring
)
3305 struct e1000_hw
*hw
= &ring
->adapter
->hw
;
3306 if ((ring
->adapter
->itr_setting
& 3) && ring
->set_itr
) {
3307 switch (hw
->mac
.type
) {
3309 wr32(ring
->itr_register
,
3314 wr32(ring
->itr_register
,
3316 (ring
->itr_val
<< 16));
3323 static irqreturn_t
igb_msix_rx(int irq
, void *data
)
3325 struct igb_ring
*rx_ring
= data
;
3326 struct igb_adapter
*adapter
= rx_ring
->adapter
;
3328 /* Write the ITR value calculated at the end of the
3329 * previous interrupt.
3332 igb_write_itr(rx_ring
);
3334 if (netif_rx_schedule_prep(adapter
->netdev
, &rx_ring
->napi
))
3335 __netif_rx_schedule(adapter
->netdev
, &rx_ring
->napi
);
3338 if (adapter
->flags
& IGB_FLAG_DCA_ENABLED
)
3339 igb_update_rx_dca(rx_ring
);
3345 static void igb_update_rx_dca(struct igb_ring
*rx_ring
)
3348 struct igb_adapter
*adapter
= rx_ring
->adapter
;
3349 struct e1000_hw
*hw
= &adapter
->hw
;
3350 int cpu
= get_cpu();
3351 int q
= rx_ring
- adapter
->rx_ring
;
3353 if (rx_ring
->cpu
!= cpu
) {
3354 dca_rxctrl
= rd32(E1000_DCA_RXCTRL(q
));
3355 if (hw
->mac
.type
== e1000_82576
) {
3356 dca_rxctrl
&= ~E1000_DCA_RXCTRL_CPUID_MASK_82576
;
3357 dca_rxctrl
|= dca_get_tag(cpu
) <<
3358 E1000_DCA_RXCTRL_CPUID_SHIFT
;
3360 dca_rxctrl
&= ~E1000_DCA_RXCTRL_CPUID_MASK
;
3361 dca_rxctrl
|= dca_get_tag(cpu
);
3363 dca_rxctrl
|= E1000_DCA_RXCTRL_DESC_DCA_EN
;
3364 dca_rxctrl
|= E1000_DCA_RXCTRL_HEAD_DCA_EN
;
3365 dca_rxctrl
|= E1000_DCA_RXCTRL_DATA_DCA_EN
;
3366 wr32(E1000_DCA_RXCTRL(q
), dca_rxctrl
);
3372 static void igb_update_tx_dca(struct igb_ring
*tx_ring
)
3375 struct igb_adapter
*adapter
= tx_ring
->adapter
;
3376 struct e1000_hw
*hw
= &adapter
->hw
;
3377 int cpu
= get_cpu();
3378 int q
= tx_ring
- adapter
->tx_ring
;
3380 if (tx_ring
->cpu
!= cpu
) {
3381 dca_txctrl
= rd32(E1000_DCA_TXCTRL(q
));
3382 if (hw
->mac
.type
== e1000_82576
) {
3383 dca_txctrl
&= ~E1000_DCA_TXCTRL_CPUID_MASK_82576
;
3384 dca_txctrl
|= dca_get_tag(cpu
) <<
3385 E1000_DCA_TXCTRL_CPUID_SHIFT
;
3387 dca_txctrl
&= ~E1000_DCA_TXCTRL_CPUID_MASK
;
3388 dca_txctrl
|= dca_get_tag(cpu
);
3390 dca_txctrl
|= E1000_DCA_TXCTRL_DESC_DCA_EN
;
3391 wr32(E1000_DCA_TXCTRL(q
), dca_txctrl
);
3397 static void igb_setup_dca(struct igb_adapter
*adapter
)
3401 if (!(adapter
->flags
& IGB_FLAG_DCA_ENABLED
))
3404 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
3405 adapter
->tx_ring
[i
].cpu
= -1;
3406 igb_update_tx_dca(&adapter
->tx_ring
[i
]);
3408 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
3409 adapter
->rx_ring
[i
].cpu
= -1;
3410 igb_update_rx_dca(&adapter
->rx_ring
[i
]);
3414 static int __igb_notify_dca(struct device
*dev
, void *data
)
3416 struct net_device
*netdev
= dev_get_drvdata(dev
);
3417 struct igb_adapter
*adapter
= netdev_priv(netdev
);
3418 struct e1000_hw
*hw
= &adapter
->hw
;
3419 unsigned long event
= *(unsigned long *)data
;
3421 if (!(adapter
->flags
& IGB_FLAG_HAS_DCA
))
3425 case DCA_PROVIDER_ADD
:
3426 /* if already enabled, don't do it again */
3427 if (adapter
->flags
& IGB_FLAG_DCA_ENABLED
)
3429 adapter
->flags
|= IGB_FLAG_DCA_ENABLED
;
3430 /* Always use CB2 mode, difference is masked
3431 * in the CB driver. */
3432 wr32(E1000_DCA_CTRL
, 2);
3433 if (dca_add_requester(dev
) == 0) {
3434 dev_info(&adapter
->pdev
->dev
, "DCA enabled\n");
3435 igb_setup_dca(adapter
);
3438 /* Fall Through since DCA is disabled. */
3439 case DCA_PROVIDER_REMOVE
:
3440 if (adapter
->flags
& IGB_FLAG_DCA_ENABLED
) {
3441 /* without this a class_device is left
3442 * hanging around in the sysfs model */
3443 dca_remove_requester(dev
);
3444 dev_info(&adapter
->pdev
->dev
, "DCA disabled\n");
3445 adapter
->flags
&= ~IGB_FLAG_DCA_ENABLED
;
3446 wr32(E1000_DCA_CTRL
, 1);
3454 static int igb_notify_dca(struct notifier_block
*nb
, unsigned long event
,
3459 ret_val
= driver_for_each_device(&igb_driver
.driver
, NULL
, &event
,
3462 return ret_val
? NOTIFY_BAD
: NOTIFY_DONE
;
3464 #endif /* CONFIG_DCA */
3467 * igb_intr_msi - Interrupt Handler
3468 * @irq: interrupt number
3469 * @data: pointer to a network interface device structure
3471 static irqreturn_t
igb_intr_msi(int irq
, void *data
)
3473 struct net_device
*netdev
= data
;
3474 struct igb_adapter
*adapter
= netdev_priv(netdev
);
3475 struct e1000_hw
*hw
= &adapter
->hw
;
3476 /* read ICR disables interrupts using IAM */
3477 u32 icr
= rd32(E1000_ICR
);
3479 igb_write_itr(adapter
->rx_ring
);
3481 if (icr
& (E1000_ICR_RXSEQ
| E1000_ICR_LSC
)) {
3482 hw
->mac
.get_link_status
= 1;
3483 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
3484 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
3487 netif_rx_schedule(netdev
, &adapter
->rx_ring
[0].napi
);
3493 * igb_intr - Interrupt Handler
3494 * @irq: interrupt number
3495 * @data: pointer to a network interface device structure
3497 static irqreturn_t
igb_intr(int irq
, void *data
)
3499 struct net_device
*netdev
= data
;
3500 struct igb_adapter
*adapter
= netdev_priv(netdev
);
3501 struct e1000_hw
*hw
= &adapter
->hw
;
3502 /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked. No
3503 * need for the IMC write */
3504 u32 icr
= rd32(E1000_ICR
);
3507 return IRQ_NONE
; /* Not our interrupt */
3509 igb_write_itr(adapter
->rx_ring
);
3511 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3512 * not set, then the adapter didn't send an interrupt */
3513 if (!(icr
& E1000_ICR_INT_ASSERTED
))
3516 eicr
= rd32(E1000_EICR
);
3518 if (icr
& (E1000_ICR_RXSEQ
| E1000_ICR_LSC
)) {
3519 hw
->mac
.get_link_status
= 1;
3520 /* guard against interrupt when we're going down */
3521 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
3522 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
3525 netif_rx_schedule(netdev
, &adapter
->rx_ring
[0].napi
);
3531 * igb_poll - NAPI Rx polling callback
3532 * @napi: napi polling structure
3533 * @budget: count of how many packets we should handle
3535 static int igb_poll(struct napi_struct
*napi
, int budget
)
3537 struct igb_ring
*rx_ring
= container_of(napi
, struct igb_ring
, napi
);
3538 struct igb_adapter
*adapter
= rx_ring
->adapter
;
3539 struct net_device
*netdev
= adapter
->netdev
;
3540 int tx_clean_complete
, work_done
= 0;
3542 /* this poll routine only supports one tx and one rx queue */
3544 if (adapter
->flags
& IGB_FLAG_DCA_ENABLED
)
3545 igb_update_tx_dca(&adapter
->tx_ring
[0]);
3547 tx_clean_complete
= igb_clean_tx_irq(&adapter
->tx_ring
[0]);
3550 if (adapter
->flags
& IGB_FLAG_DCA_ENABLED
)
3551 igb_update_rx_dca(&adapter
->rx_ring
[0]);
3553 igb_clean_rx_irq_adv(&adapter
->rx_ring
[0], &work_done
, budget
);
3555 /* If no Tx and not enough Rx work done, exit the polling mode */
3556 if ((tx_clean_complete
&& (work_done
< budget
)) ||
3557 !netif_running(netdev
)) {
3558 if (adapter
->itr_setting
& 3)
3559 igb_set_itr(adapter
);
3560 netif_rx_complete(netdev
, napi
);
3561 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
3562 igb_irq_enable(adapter
);
3569 static int igb_clean_rx_ring_msix(struct napi_struct
*napi
, int budget
)
3571 struct igb_ring
*rx_ring
= container_of(napi
, struct igb_ring
, napi
);
3572 struct igb_adapter
*adapter
= rx_ring
->adapter
;
3573 struct e1000_hw
*hw
= &adapter
->hw
;
3574 struct net_device
*netdev
= adapter
->netdev
;
3577 /* Keep link state information with original netdev */
3578 if (!netif_carrier_ok(netdev
))
3582 if (adapter
->flags
& IGB_FLAG_DCA_ENABLED
)
3583 igb_update_rx_dca(rx_ring
);
3585 igb_clean_rx_irq_adv(rx_ring
, &work_done
, budget
);
3588 /* If not enough Rx work done, exit the polling mode */
3589 if ((work_done
== 0) || !netif_running(netdev
)) {
3591 netif_rx_complete(netdev
, napi
);
3593 if (adapter
->itr_setting
& 3) {
3594 if (adapter
->num_rx_queues
== 1)
3595 igb_set_itr(adapter
);
3597 igb_update_ring_itr(rx_ring
);
3600 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
3601 wr32(E1000_EIMS
, rx_ring
->eims_value
);
3609 static inline u32
get_head(struct igb_ring
*tx_ring
)
3611 void *end
= (struct e1000_tx_desc
*)tx_ring
->desc
+ tx_ring
->count
;
3612 return le32_to_cpu(*(volatile __le32
*)end
);
3616 * igb_clean_tx_irq - Reclaim resources after transmit completes
3617 * @adapter: board private structure
3618 * returns true if ring is completely cleaned
3620 static bool igb_clean_tx_irq(struct igb_ring
*tx_ring
)
3622 struct igb_adapter
*adapter
= tx_ring
->adapter
;
3623 struct e1000_hw
*hw
= &adapter
->hw
;
3624 struct net_device
*netdev
= adapter
->netdev
;
3625 struct e1000_tx_desc
*tx_desc
;
3626 struct igb_buffer
*buffer_info
;
3627 struct sk_buff
*skb
;
3630 unsigned int count
= 0;
3631 bool cleaned
= false;
3633 unsigned int total_bytes
= 0, total_packets
= 0;
3636 head
= get_head(tx_ring
);
3637 i
= tx_ring
->next_to_clean
;
3641 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3642 buffer_info
= &tx_ring
->buffer_info
[i
];
3643 skb
= buffer_info
->skb
;
3646 unsigned int segs
, bytecount
;
3647 /* gso_segs is currently only valid for tcp */
3648 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
3649 /* multiply data chunks by size of headers */
3650 bytecount
= ((segs
- 1) * skb_headlen(skb
)) +
3652 total_packets
+= segs
;
3653 total_bytes
+= bytecount
;
3656 igb_unmap_and_free_tx_resource(adapter
, buffer_info
);
3657 tx_desc
->upper
.data
= 0;
3660 if (i
== tx_ring
->count
)
3664 if (count
== IGB_MAX_TX_CLEAN
) {
3671 head
= get_head(tx_ring
);
3672 if (head
== oldhead
)
3677 tx_ring
->next_to_clean
= i
;
3679 if (unlikely(cleaned
&&
3680 netif_carrier_ok(netdev
) &&
3681 IGB_DESC_UNUSED(tx_ring
) >= IGB_TX_QUEUE_WAKE
)) {
3682 /* Make sure that anybody stopping the queue after this
3683 * sees the new next_to_clean.
3686 if (__netif_subqueue_stopped(netdev
, tx_ring
->queue_index
) &&
3687 !(test_bit(__IGB_DOWN
, &adapter
->state
))) {
3688 netif_wake_subqueue(netdev
, tx_ring
->queue_index
);
3689 ++adapter
->restart_queue
;
3693 if (tx_ring
->detect_tx_hung
) {
3694 /* Detect a transmit hang in hardware, this serializes the
3695 * check with the clearing of time_stamp and movement of i */
3696 tx_ring
->detect_tx_hung
= false;
3697 if (tx_ring
->buffer_info
[i
].time_stamp
&&
3698 time_after(jiffies
, tx_ring
->buffer_info
[i
].time_stamp
+
3699 (adapter
->tx_timeout_factor
* HZ
))
3700 && !(rd32(E1000_STATUS
) &
3701 E1000_STATUS_TXOFF
)) {
3703 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3704 /* detected Tx unit hang */
3705 dev_err(&adapter
->pdev
->dev
,
3706 "Detected Tx Unit Hang\n"
3710 " next_to_use <%x>\n"
3711 " next_to_clean <%x>\n"
3713 "buffer_info[next_to_clean]\n"
3714 " time_stamp <%lx>\n"
3716 " desc.status <%x>\n",
3717 tx_ring
->queue_index
,
3718 readl(adapter
->hw
.hw_addr
+ tx_ring
->head
),
3719 readl(adapter
->hw
.hw_addr
+ tx_ring
->tail
),
3720 tx_ring
->next_to_use
,
3721 tx_ring
->next_to_clean
,
3723 tx_ring
->buffer_info
[i
].time_stamp
,
3725 tx_desc
->upper
.fields
.status
);
3726 netif_stop_subqueue(netdev
, tx_ring
->queue_index
);
3729 tx_ring
->total_bytes
+= total_bytes
;
3730 tx_ring
->total_packets
+= total_packets
;
3731 tx_ring
->tx_stats
.bytes
+= total_bytes
;
3732 tx_ring
->tx_stats
.packets
+= total_packets
;
3733 adapter
->net_stats
.tx_bytes
+= total_bytes
;
3734 adapter
->net_stats
.tx_packets
+= total_packets
;
3738 #ifdef CONFIG_IGB_LRO
3740 * igb_get_skb_hdr - helper function for LRO header processing
3741 * @skb: pointer to sk_buff to be added to LRO packet
3742 * @iphdr: pointer to ip header structure
3743 * @tcph: pointer to tcp header structure
3744 * @hdr_flags: pointer to header flags
3745 * @priv: pointer to the receive descriptor for the current sk_buff
3747 static int igb_get_skb_hdr(struct sk_buff
*skb
, void **iphdr
, void **tcph
,
3748 u64
*hdr_flags
, void *priv
)
3750 union e1000_adv_rx_desc
*rx_desc
= priv
;
3751 u16 pkt_type
= rx_desc
->wb
.lower
.lo_dword
.pkt_info
&
3752 (E1000_RXDADV_PKTTYPE_IPV4
| E1000_RXDADV_PKTTYPE_TCP
);
3754 /* Verify that this is a valid IPv4 TCP packet */
3755 if (pkt_type
!= (E1000_RXDADV_PKTTYPE_IPV4
|
3756 E1000_RXDADV_PKTTYPE_TCP
))
3759 /* Set network headers */
3760 skb_reset_network_header(skb
);
3761 skb_set_transport_header(skb
, ip_hdrlen(skb
));
3762 *iphdr
= ip_hdr(skb
);
3763 *tcph
= tcp_hdr(skb
);
3764 *hdr_flags
= LRO_IPV4
| LRO_TCP
;
3769 #endif /* CONFIG_IGB_LRO */
3772 * igb_receive_skb - helper function to handle rx indications
3773 * @ring: pointer to receive ring receving this packet
3774 * @status: descriptor status field as written by hardware
3775 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3776 * @skb: pointer to sk_buff to be indicated to stack
3778 static void igb_receive_skb(struct igb_ring
*ring
, u8 status
,
3779 union e1000_adv_rx_desc
* rx_desc
,
3780 struct sk_buff
*skb
)
3782 struct igb_adapter
* adapter
= ring
->adapter
;
3783 bool vlan_extracted
= (adapter
->vlgrp
&& (status
& E1000_RXD_STAT_VP
));
3785 #ifdef CONFIG_IGB_LRO
3786 if (adapter
->netdev
->features
& NETIF_F_LRO
&&
3787 skb
->ip_summed
== CHECKSUM_UNNECESSARY
) {
3789 lro_vlan_hwaccel_receive_skb(&ring
->lro_mgr
, skb
,
3791 le16_to_cpu(rx_desc
->wb
.upper
.vlan
),
3794 lro_receive_skb(&ring
->lro_mgr
,skb
, rx_desc
);
3799 vlan_hwaccel_receive_skb(skb
, adapter
->vlgrp
,
3800 le16_to_cpu(rx_desc
->wb
.upper
.vlan
));
3803 netif_receive_skb(skb
);
3804 #ifdef CONFIG_IGB_LRO
3810 static inline void igb_rx_checksum_adv(struct igb_adapter
*adapter
,
3811 u32 status_err
, struct sk_buff
*skb
)
3813 skb
->ip_summed
= CHECKSUM_NONE
;
3815 /* Ignore Checksum bit is set or checksum is disabled through ethtool */
3816 if ((status_err
& E1000_RXD_STAT_IXSM
) || !adapter
->rx_csum
)
3818 /* TCP/UDP checksum error bit is set */
3820 (E1000_RXDEXT_STATERR_TCPE
| E1000_RXDEXT_STATERR_IPE
)) {
3821 /* let the stack verify checksum errors */
3822 adapter
->hw_csum_err
++;
3825 /* It must be a TCP or UDP packet with a valid checksum */
3826 if (status_err
& (E1000_RXD_STAT_TCPCS
| E1000_RXD_STAT_UDPCS
))
3827 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
3829 adapter
->hw_csum_good
++;
3832 static bool igb_clean_rx_irq_adv(struct igb_ring
*rx_ring
,
3833 int *work_done
, int budget
)
3835 struct igb_adapter
*adapter
= rx_ring
->adapter
;
3836 struct net_device
*netdev
= adapter
->netdev
;
3837 struct pci_dev
*pdev
= adapter
->pdev
;
3838 union e1000_adv_rx_desc
*rx_desc
, *next_rxd
;
3839 struct igb_buffer
*buffer_info
, *next_buffer
;
3840 struct sk_buff
*skb
;
3842 u32 length
, hlen
, staterr
;
3843 bool cleaned
= false;
3844 int cleaned_count
= 0;
3845 unsigned int total_bytes
= 0, total_packets
= 0;
3847 i
= rx_ring
->next_to_clean
;
3848 rx_desc
= E1000_RX_DESC_ADV(*rx_ring
, i
);
3849 staterr
= le32_to_cpu(rx_desc
->wb
.upper
.status_error
);
3851 while (staterr
& E1000_RXD_STAT_DD
) {
3852 if (*work_done
>= budget
)
3855 buffer_info
= &rx_ring
->buffer_info
[i
];
3857 /* HW will not DMA in data larger than the given buffer, even
3858 * if it parses the (NFS, of course) header to be larger. In
3859 * that case, it fills the header buffer and spills the rest
3862 hlen
= (le16_to_cpu(rx_desc
->wb
.lower
.lo_dword
.hdr_info
) &
3863 E1000_RXDADV_HDRBUFLEN_MASK
) >> E1000_RXDADV_HDRBUFLEN_SHIFT
;
3864 if (hlen
> adapter
->rx_ps_hdr_size
)
3865 hlen
= adapter
->rx_ps_hdr_size
;
3867 length
= le16_to_cpu(rx_desc
->wb
.upper
.length
);
3871 skb
= buffer_info
->skb
;
3872 prefetch(skb
->data
- NET_IP_ALIGN
);
3873 buffer_info
->skb
= NULL
;
3874 if (!adapter
->rx_ps_hdr_size
) {
3875 pci_unmap_single(pdev
, buffer_info
->dma
,
3876 adapter
->rx_buffer_len
+
3878 PCI_DMA_FROMDEVICE
);
3879 skb_put(skb
, length
);
3883 if (!skb_shinfo(skb
)->nr_frags
) {
3884 pci_unmap_single(pdev
, buffer_info
->dma
,
3885 adapter
->rx_ps_hdr_size
+
3887 PCI_DMA_FROMDEVICE
);
3892 pci_unmap_page(pdev
, buffer_info
->page_dma
,
3893 PAGE_SIZE
/ 2, PCI_DMA_FROMDEVICE
);
3894 buffer_info
->page_dma
= 0;
3896 skb_fill_page_desc(skb
, skb_shinfo(skb
)->nr_frags
++,
3898 buffer_info
->page_offset
,
3901 if ((adapter
->rx_buffer_len
> (PAGE_SIZE
/ 2)) ||
3902 (page_count(buffer_info
->page
) != 1))
3903 buffer_info
->page
= NULL
;
3905 get_page(buffer_info
->page
);
3908 skb
->data_len
+= length
;
3910 skb
->truesize
+= length
;
3914 if (i
== rx_ring
->count
)
3916 next_rxd
= E1000_RX_DESC_ADV(*rx_ring
, i
);
3918 next_buffer
= &rx_ring
->buffer_info
[i
];
3920 if (!(staterr
& E1000_RXD_STAT_EOP
)) {
3921 buffer_info
->skb
= xchg(&next_buffer
->skb
, skb
);
3922 buffer_info
->dma
= xchg(&next_buffer
->dma
, 0);
3926 if (staterr
& E1000_RXDEXT_ERR_FRAME_ERR_MASK
) {
3927 dev_kfree_skb_irq(skb
);
3931 total_bytes
+= skb
->len
;
3934 igb_rx_checksum_adv(adapter
, staterr
, skb
);
3936 skb
->protocol
= eth_type_trans(skb
, netdev
);
3938 igb_receive_skb(rx_ring
, staterr
, rx_desc
, skb
);
3940 netdev
->last_rx
= jiffies
;
3943 rx_desc
->wb
.upper
.status_error
= 0;
3945 /* return some buffers to hardware, one at a time is too slow */
3946 if (cleaned_count
>= IGB_RX_BUFFER_WRITE
) {
3947 igb_alloc_rx_buffers_adv(rx_ring
, cleaned_count
);
3951 /* use prefetched values */
3953 buffer_info
= next_buffer
;
3955 staterr
= le32_to_cpu(rx_desc
->wb
.upper
.status_error
);
3958 rx_ring
->next_to_clean
= i
;
3959 cleaned_count
= IGB_DESC_UNUSED(rx_ring
);
3961 #ifdef CONFIG_IGB_LRO
3962 if (rx_ring
->lro_used
) {
3963 lro_flush_all(&rx_ring
->lro_mgr
);
3964 rx_ring
->lro_used
= 0;
3969 igb_alloc_rx_buffers_adv(rx_ring
, cleaned_count
);
3971 rx_ring
->total_packets
+= total_packets
;
3972 rx_ring
->total_bytes
+= total_bytes
;
3973 rx_ring
->rx_stats
.packets
+= total_packets
;
3974 rx_ring
->rx_stats
.bytes
+= total_bytes
;
3975 adapter
->net_stats
.rx_bytes
+= total_bytes
;
3976 adapter
->net_stats
.rx_packets
+= total_packets
;
3982 * igb_alloc_rx_buffers_adv - Replace used receive buffers; packet split
3983 * @adapter: address of board private structure
3985 static void igb_alloc_rx_buffers_adv(struct igb_ring
*rx_ring
,
3988 struct igb_adapter
*adapter
= rx_ring
->adapter
;
3989 struct net_device
*netdev
= adapter
->netdev
;
3990 struct pci_dev
*pdev
= adapter
->pdev
;
3991 union e1000_adv_rx_desc
*rx_desc
;
3992 struct igb_buffer
*buffer_info
;
3993 struct sk_buff
*skb
;
3996 i
= rx_ring
->next_to_use
;
3997 buffer_info
= &rx_ring
->buffer_info
[i
];
3999 while (cleaned_count
--) {
4000 rx_desc
= E1000_RX_DESC_ADV(*rx_ring
, i
);
4002 if (adapter
->rx_ps_hdr_size
&& !buffer_info
->page_dma
) {
4003 if (!buffer_info
->page
) {
4004 buffer_info
->page
= alloc_page(GFP_ATOMIC
);
4005 if (!buffer_info
->page
) {
4006 adapter
->alloc_rx_buff_failed
++;
4009 buffer_info
->page_offset
= 0;
4011 buffer_info
->page_offset
^= PAGE_SIZE
/ 2;
4013 buffer_info
->page_dma
=
4016 buffer_info
->page_offset
,
4018 PCI_DMA_FROMDEVICE
);
4021 if (!buffer_info
->skb
) {
4024 if (adapter
->rx_ps_hdr_size
)
4025 bufsz
= adapter
->rx_ps_hdr_size
;
4027 bufsz
= adapter
->rx_buffer_len
;
4028 bufsz
+= NET_IP_ALIGN
;
4029 skb
= netdev_alloc_skb(netdev
, bufsz
);
4032 adapter
->alloc_rx_buff_failed
++;
4036 /* Make buffer alignment 2 beyond a 16 byte boundary
4037 * this will result in a 16 byte aligned IP header after
4038 * the 14 byte MAC header is removed
4040 skb_reserve(skb
, NET_IP_ALIGN
);
4042 buffer_info
->skb
= skb
;
4043 buffer_info
->dma
= pci_map_single(pdev
, skb
->data
,
4045 PCI_DMA_FROMDEVICE
);
4048 /* Refresh the desc even if buffer_addrs didn't change because
4049 * each write-back erases this info. */
4050 if (adapter
->rx_ps_hdr_size
) {
4051 rx_desc
->read
.pkt_addr
=
4052 cpu_to_le64(buffer_info
->page_dma
);
4053 rx_desc
->read
.hdr_addr
= cpu_to_le64(buffer_info
->dma
);
4055 rx_desc
->read
.pkt_addr
=
4056 cpu_to_le64(buffer_info
->dma
);
4057 rx_desc
->read
.hdr_addr
= 0;
4061 if (i
== rx_ring
->count
)
4063 buffer_info
= &rx_ring
->buffer_info
[i
];
4067 if (rx_ring
->next_to_use
!= i
) {
4068 rx_ring
->next_to_use
= i
;
4070 i
= (rx_ring
->count
- 1);
4074 /* Force memory writes to complete before letting h/w
4075 * know there are new descriptors to fetch. (Only
4076 * applicable for weak-ordered memory model archs,
4077 * such as IA-64). */
4079 writel(i
, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
4089 static int igb_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
4091 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4092 struct mii_ioctl_data
*data
= if_mii(ifr
);
4094 if (adapter
->hw
.phy
.media_type
!= e1000_media_type_copper
)
4099 data
->phy_id
= adapter
->hw
.phy
.addr
;
4102 if (!capable(CAP_NET_ADMIN
))
4104 if (adapter
->hw
.phy
.ops
.read_phy_reg(&adapter
->hw
,
4106 & 0x1F, &data
->val_out
))
4122 static int igb_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
4128 return igb_mii_ioctl(netdev
, ifr
, cmd
);
4134 static void igb_vlan_rx_register(struct net_device
*netdev
,
4135 struct vlan_group
*grp
)
4137 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4138 struct e1000_hw
*hw
= &adapter
->hw
;
4141 igb_irq_disable(adapter
);
4142 adapter
->vlgrp
= grp
;
4145 /* enable VLAN tag insert/strip */
4146 ctrl
= rd32(E1000_CTRL
);
4147 ctrl
|= E1000_CTRL_VME
;
4148 wr32(E1000_CTRL
, ctrl
);
4150 /* enable VLAN receive filtering */
4151 rctl
= rd32(E1000_RCTL
);
4152 rctl
&= ~E1000_RCTL_CFIEN
;
4153 wr32(E1000_RCTL
, rctl
);
4154 igb_update_mng_vlan(adapter
);
4156 adapter
->max_frame_size
+ VLAN_TAG_SIZE
);
4158 /* disable VLAN tag insert/strip */
4159 ctrl
= rd32(E1000_CTRL
);
4160 ctrl
&= ~E1000_CTRL_VME
;
4161 wr32(E1000_CTRL
, ctrl
);
4163 if (adapter
->mng_vlan_id
!= (u16
)IGB_MNG_VLAN_NONE
) {
4164 igb_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
4165 adapter
->mng_vlan_id
= IGB_MNG_VLAN_NONE
;
4168 adapter
->max_frame_size
);
4171 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
4172 igb_irq_enable(adapter
);
4175 static void igb_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
4177 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4178 struct e1000_hw
*hw
= &adapter
->hw
;
4181 if ((adapter
->hw
.mng_cookie
.status
&
4182 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
4183 (vid
== adapter
->mng_vlan_id
))
4185 /* add VID to filter table */
4186 index
= (vid
>> 5) & 0x7F;
4187 vfta
= array_rd32(E1000_VFTA
, index
);
4188 vfta
|= (1 << (vid
& 0x1F));
4189 igb_write_vfta(&adapter
->hw
, index
, vfta
);
4192 static void igb_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
4194 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4195 struct e1000_hw
*hw
= &adapter
->hw
;
4198 igb_irq_disable(adapter
);
4199 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
4201 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
4202 igb_irq_enable(adapter
);
4204 if ((adapter
->hw
.mng_cookie
.status
&
4205 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
4206 (vid
== adapter
->mng_vlan_id
)) {
4207 /* release control to f/w */
4208 igb_release_hw_control(adapter
);
4212 /* remove VID from filter table */
4213 index
= (vid
>> 5) & 0x7F;
4214 vfta
= array_rd32(E1000_VFTA
, index
);
4215 vfta
&= ~(1 << (vid
& 0x1F));
4216 igb_write_vfta(&adapter
->hw
, index
, vfta
);
4219 static void igb_restore_vlan(struct igb_adapter
*adapter
)
4221 igb_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
4223 if (adapter
->vlgrp
) {
4225 for (vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
4226 if (!vlan_group_get_device(adapter
->vlgrp
, vid
))
4228 igb_vlan_rx_add_vid(adapter
->netdev
, vid
);
4233 int igb_set_spd_dplx(struct igb_adapter
*adapter
, u16 spddplx
)
4235 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
4239 /* Fiber NICs only allow 1000 gbps Full duplex */
4240 if ((adapter
->hw
.phy
.media_type
== e1000_media_type_fiber
) &&
4241 spddplx
!= (SPEED_1000
+ DUPLEX_FULL
)) {
4242 dev_err(&adapter
->pdev
->dev
,
4243 "Unsupported Speed/Duplex configuration\n");
4248 case SPEED_10
+ DUPLEX_HALF
:
4249 mac
->forced_speed_duplex
= ADVERTISE_10_HALF
;
4251 case SPEED_10
+ DUPLEX_FULL
:
4252 mac
->forced_speed_duplex
= ADVERTISE_10_FULL
;
4254 case SPEED_100
+ DUPLEX_HALF
:
4255 mac
->forced_speed_duplex
= ADVERTISE_100_HALF
;
4257 case SPEED_100
+ DUPLEX_FULL
:
4258 mac
->forced_speed_duplex
= ADVERTISE_100_FULL
;
4260 case SPEED_1000
+ DUPLEX_FULL
:
4262 adapter
->hw
.phy
.autoneg_advertised
= ADVERTISE_1000_FULL
;
4264 case SPEED_1000
+ DUPLEX_HALF
: /* not supported */
4266 dev_err(&adapter
->pdev
->dev
,
4267 "Unsupported Speed/Duplex configuration\n");
4274 static int igb_suspend(struct pci_dev
*pdev
, pm_message_t state
)
4276 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4277 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4278 struct e1000_hw
*hw
= &adapter
->hw
;
4279 u32 ctrl
, rctl
, status
;
4280 u32 wufc
= adapter
->wol
;
4285 netif_device_detach(netdev
);
4287 if (netif_running(netdev
))
4290 igb_reset_interrupt_capability(adapter
);
4292 igb_free_queues(adapter
);
4295 retval
= pci_save_state(pdev
);
4300 status
= rd32(E1000_STATUS
);
4301 if (status
& E1000_STATUS_LU
)
4302 wufc
&= ~E1000_WUFC_LNKC
;
4305 igb_setup_rctl(adapter
);
4306 igb_set_multi(netdev
);
4308 /* turn on all-multi mode if wake on multicast is enabled */
4309 if (wufc
& E1000_WUFC_MC
) {
4310 rctl
= rd32(E1000_RCTL
);
4311 rctl
|= E1000_RCTL_MPE
;
4312 wr32(E1000_RCTL
, rctl
);
4315 ctrl
= rd32(E1000_CTRL
);
4316 /* advertise wake from D3Cold */
4317 #define E1000_CTRL_ADVD3WUC 0x00100000
4318 /* phy power management enable */
4319 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4320 ctrl
|= E1000_CTRL_ADVD3WUC
;
4321 wr32(E1000_CTRL
, ctrl
);
4323 /* Allow time for pending master requests to run */
4324 igb_disable_pcie_master(&adapter
->hw
);
4326 wr32(E1000_WUC
, E1000_WUC_PME_EN
);
4327 wr32(E1000_WUFC
, wufc
);
4330 wr32(E1000_WUFC
, 0);
4333 /* make sure adapter isn't asleep if manageability/wol is enabled */
4334 if (wufc
|| adapter
->en_mng_pt
) {
4335 pci_enable_wake(pdev
, PCI_D3hot
, 1);
4336 pci_enable_wake(pdev
, PCI_D3cold
, 1);
4338 igb_shutdown_fiber_serdes_link_82575(hw
);
4339 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4340 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4343 /* Release control of h/w to f/w. If f/w is AMT enabled, this
4344 * would have already happened in close and is redundant. */
4345 igb_release_hw_control(adapter
);
4347 pci_disable_device(pdev
);
4349 pci_set_power_state(pdev
, pci_choose_state(pdev
, state
));
4355 static int igb_resume(struct pci_dev
*pdev
)
4357 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4358 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4359 struct e1000_hw
*hw
= &adapter
->hw
;
4362 pci_set_power_state(pdev
, PCI_D0
);
4363 pci_restore_state(pdev
);
4365 if (adapter
->need_ioport
)
4366 err
= pci_enable_device(pdev
);
4368 err
= pci_enable_device_mem(pdev
);
4371 "igb: Cannot enable PCI device from suspend\n");
4374 pci_set_master(pdev
);
4376 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4377 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4379 igb_set_interrupt_capability(adapter
);
4381 if (igb_alloc_queues(adapter
)) {
4382 dev_err(&pdev
->dev
, "Unable to allocate memory for queues\n");
4386 /* e1000_power_up_phy(adapter); */
4389 wr32(E1000_WUS
, ~0);
4391 if (netif_running(netdev
)) {
4392 err
= igb_open(netdev
);
4397 netif_device_attach(netdev
);
4399 /* let the f/w know that the h/w is now under the control of the
4401 igb_get_hw_control(adapter
);
4407 static void igb_shutdown(struct pci_dev
*pdev
)
4409 igb_suspend(pdev
, PMSG_SUSPEND
);
4412 #ifdef CONFIG_NET_POLL_CONTROLLER
4414 * Polling 'interrupt' - used by things like netconsole to send skbs
4415 * without having to re-enable interrupts. It's not called while
4416 * the interrupt routine is executing.
4418 static void igb_netpoll(struct net_device
*netdev
)
4420 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4424 igb_irq_disable(adapter
);
4425 adapter
->flags
|= IGB_FLAG_IN_NETPOLL
;
4427 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
4428 igb_clean_tx_irq(&adapter
->tx_ring
[i
]);
4430 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
4431 igb_clean_rx_irq_adv(&adapter
->rx_ring
[i
],
4433 adapter
->rx_ring
[i
].napi
.weight
);
4435 adapter
->flags
&= ~IGB_FLAG_IN_NETPOLL
;
4436 igb_irq_enable(adapter
);
4438 #endif /* CONFIG_NET_POLL_CONTROLLER */
4441 * igb_io_error_detected - called when PCI error is detected
4442 * @pdev: Pointer to PCI device
4443 * @state: The current pci connection state
4445 * This function is called after a PCI bus error affecting
4446 * this device has been detected.
4448 static pci_ers_result_t
igb_io_error_detected(struct pci_dev
*pdev
,
4449 pci_channel_state_t state
)
4451 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4452 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4454 netif_device_detach(netdev
);
4456 if (netif_running(netdev
))
4458 pci_disable_device(pdev
);
4460 /* Request a slot slot reset. */
4461 return PCI_ERS_RESULT_NEED_RESET
;
4465 * igb_io_slot_reset - called after the pci bus has been reset.
4466 * @pdev: Pointer to PCI device
4468 * Restart the card from scratch, as if from a cold-boot. Implementation
4469 * resembles the first-half of the igb_resume routine.
4471 static pci_ers_result_t
igb_io_slot_reset(struct pci_dev
*pdev
)
4473 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4474 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4475 struct e1000_hw
*hw
= &adapter
->hw
;
4478 if (adapter
->need_ioport
)
4479 err
= pci_enable_device(pdev
);
4481 err
= pci_enable_device_mem(pdev
);
4484 "Cannot re-enable PCI device after reset.\n");
4485 return PCI_ERS_RESULT_DISCONNECT
;
4487 pci_set_master(pdev
);
4488 pci_restore_state(pdev
);
4490 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4491 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4494 wr32(E1000_WUS
, ~0);
4496 return PCI_ERS_RESULT_RECOVERED
;
4500 * igb_io_resume - called when traffic can start flowing again.
4501 * @pdev: Pointer to PCI device
4503 * This callback is called when the error recovery driver tells us that
4504 * its OK to resume normal operation. Implementation resembles the
4505 * second-half of the igb_resume routine.
4507 static void igb_io_resume(struct pci_dev
*pdev
)
4509 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4510 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4512 if (netif_running(netdev
)) {
4513 if (igb_up(adapter
)) {
4514 dev_err(&pdev
->dev
, "igb_up failed after reset\n");
4519 netif_device_attach(netdev
);
4521 /* let the f/w know that the h/w is now under the control of the
4523 igb_get_hw_control(adapter
);