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/pci-aspm.h>
42 #include <linux/delay.h>
43 #include <linux/interrupt.h>
44 #include <linux/if_ether.h>
45 #include <linux/aer.h>
47 #include <linux/dca.h>
51 #define DRV_VERSION "1.2.45-k2"
52 char igb_driver_name
[] = "igb";
53 char igb_driver_version
[] = DRV_VERSION
;
54 static const char igb_driver_string
[] =
55 "Intel(R) Gigabit Ethernet Network Driver";
56 static const char igb_copyright
[] = "Copyright (c) 2008 Intel Corporation.";
58 static const struct e1000_info
*igb_info_tbl
[] = {
59 [board_82575
] = &e1000_82575_info
,
62 static struct pci_device_id igb_pci_tbl
[] = {
63 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82576
), board_82575
},
64 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82576_FIBER
), board_82575
},
65 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82576_SERDES
), board_82575
},
66 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82575EB_COPPER
), board_82575
},
67 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82575EB_FIBER_SERDES
), board_82575
},
68 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82575GB_QUAD_COPPER
), board_82575
},
69 /* required last entry */
73 MODULE_DEVICE_TABLE(pci
, igb_pci_tbl
);
75 void igb_reset(struct igb_adapter
*);
76 static int igb_setup_all_tx_resources(struct igb_adapter
*);
77 static int igb_setup_all_rx_resources(struct igb_adapter
*);
78 static void igb_free_all_tx_resources(struct igb_adapter
*);
79 static void igb_free_all_rx_resources(struct igb_adapter
*);
80 void igb_update_stats(struct igb_adapter
*);
81 static int igb_probe(struct pci_dev
*, const struct pci_device_id
*);
82 static void __devexit
igb_remove(struct pci_dev
*pdev
);
83 static int igb_sw_init(struct igb_adapter
*);
84 static int igb_open(struct net_device
*);
85 static int igb_close(struct net_device
*);
86 static void igb_configure_tx(struct igb_adapter
*);
87 static void igb_configure_rx(struct igb_adapter
*);
88 static void igb_setup_rctl(struct igb_adapter
*);
89 static void igb_clean_all_tx_rings(struct igb_adapter
*);
90 static void igb_clean_all_rx_rings(struct igb_adapter
*);
91 static void igb_clean_tx_ring(struct igb_ring
*);
92 static void igb_clean_rx_ring(struct igb_ring
*);
93 static void igb_set_multi(struct net_device
*);
94 static void igb_update_phy_info(unsigned long);
95 static void igb_watchdog(unsigned long);
96 static void igb_watchdog_task(struct work_struct
*);
97 static int igb_xmit_frame_ring_adv(struct sk_buff
*, struct net_device
*,
99 static int igb_xmit_frame_adv(struct sk_buff
*skb
, struct net_device
*);
100 static struct net_device_stats
*igb_get_stats(struct net_device
*);
101 static int igb_change_mtu(struct net_device
*, int);
102 static int igb_set_mac(struct net_device
*, void *);
103 static irqreturn_t
igb_intr(int irq
, void *);
104 static irqreturn_t
igb_intr_msi(int irq
, void *);
105 static irqreturn_t
igb_msix_other(int irq
, void *);
106 static irqreturn_t
igb_msix_rx(int irq
, void *);
107 static irqreturn_t
igb_msix_tx(int irq
, void *);
108 static int igb_clean_rx_ring_msix(struct napi_struct
*, int);
109 #ifdef CONFIG_IGB_DCA
110 static void igb_update_rx_dca(struct igb_ring
*);
111 static void igb_update_tx_dca(struct igb_ring
*);
112 static void igb_setup_dca(struct igb_adapter
*);
113 #endif /* CONFIG_IGB_DCA */
114 static bool igb_clean_tx_irq(struct igb_ring
*);
115 static int igb_poll(struct napi_struct
*, int);
116 static bool igb_clean_rx_irq_adv(struct igb_ring
*, int *, int);
117 static void igb_alloc_rx_buffers_adv(struct igb_ring
*, int);
118 static int igb_ioctl(struct net_device
*, struct ifreq
*, int cmd
);
119 static void igb_tx_timeout(struct net_device
*);
120 static void igb_reset_task(struct work_struct
*);
121 static void igb_vlan_rx_register(struct net_device
*, struct vlan_group
*);
122 static void igb_vlan_rx_add_vid(struct net_device
*, u16
);
123 static void igb_vlan_rx_kill_vid(struct net_device
*, u16
);
124 static void igb_restore_vlan(struct igb_adapter
*);
126 static int igb_suspend(struct pci_dev
*, pm_message_t
);
128 static int igb_resume(struct pci_dev
*);
130 static void igb_shutdown(struct pci_dev
*);
131 #ifdef CONFIG_IGB_DCA
132 static int igb_notify_dca(struct notifier_block
*, unsigned long, void *);
133 static struct notifier_block dca_notifier
= {
134 .notifier_call
= igb_notify_dca
,
140 #ifdef CONFIG_NET_POLL_CONTROLLER
141 /* for netdump / net console */
142 static void igb_netpoll(struct net_device
*);
145 static pci_ers_result_t
igb_io_error_detected(struct pci_dev
*,
146 pci_channel_state_t
);
147 static pci_ers_result_t
igb_io_slot_reset(struct pci_dev
*);
148 static void igb_io_resume(struct pci_dev
*);
150 static struct pci_error_handlers igb_err_handler
= {
151 .error_detected
= igb_io_error_detected
,
152 .slot_reset
= igb_io_slot_reset
,
153 .resume
= igb_io_resume
,
157 static struct pci_driver igb_driver
= {
158 .name
= igb_driver_name
,
159 .id_table
= igb_pci_tbl
,
161 .remove
= __devexit_p(igb_remove
),
163 /* Power Managment Hooks */
164 .suspend
= igb_suspend
,
165 .resume
= igb_resume
,
167 .shutdown
= igb_shutdown
,
168 .err_handler
= &igb_err_handler
171 static int global_quad_port_a
; /* global quad port a indication */
173 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
174 MODULE_DESCRIPTION("Intel(R) Gigabit Ethernet Network Driver");
175 MODULE_LICENSE("GPL");
176 MODULE_VERSION(DRV_VERSION
);
180 * igb_get_hw_dev_name - return device name string
181 * used by hardware layer to print debugging information
183 char *igb_get_hw_dev_name(struct e1000_hw
*hw
)
185 struct igb_adapter
*adapter
= hw
->back
;
186 return adapter
->netdev
->name
;
191 * igb_init_module - Driver Registration Routine
193 * igb_init_module is the first routine called when the driver is
194 * loaded. All it does is register with the PCI subsystem.
196 static int __init
igb_init_module(void)
199 printk(KERN_INFO
"%s - version %s\n",
200 igb_driver_string
, igb_driver_version
);
202 printk(KERN_INFO
"%s\n", igb_copyright
);
204 global_quad_port_a
= 0;
206 #ifdef CONFIG_IGB_DCA
207 dca_register_notify(&dca_notifier
);
210 ret
= pci_register_driver(&igb_driver
);
214 module_init(igb_init_module
);
217 * igb_exit_module - Driver Exit Cleanup Routine
219 * igb_exit_module is called just before the driver is removed
222 static void __exit
igb_exit_module(void)
224 #ifdef CONFIG_IGB_DCA
225 dca_unregister_notify(&dca_notifier
);
227 pci_unregister_driver(&igb_driver
);
230 module_exit(igb_exit_module
);
232 #define Q_IDX_82576(i) (((i & 0x1) << 3) + (i >> 1))
234 * igb_cache_ring_register - Descriptor ring to register mapping
235 * @adapter: board private structure to initialize
237 * Once we know the feature-set enabled for the device, we'll cache
238 * the register offset the descriptor ring is assigned to.
240 static void igb_cache_ring_register(struct igb_adapter
*adapter
)
244 switch (adapter
->hw
.mac
.type
) {
246 /* The queues are allocated for virtualization such that VF 0
247 * is allocated queues 0 and 8, VF 1 queues 1 and 9, etc.
248 * In order to avoid collision we start at the first free queue
249 * and continue consuming queues in the same sequence
251 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
252 adapter
->rx_ring
[i
].reg_idx
= Q_IDX_82576(i
);
253 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
254 adapter
->tx_ring
[i
].reg_idx
= Q_IDX_82576(i
);
258 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
259 adapter
->rx_ring
[i
].reg_idx
= i
;
260 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
261 adapter
->tx_ring
[i
].reg_idx
= i
;
267 * igb_alloc_queues - Allocate memory for all rings
268 * @adapter: board private structure to initialize
270 * We allocate one ring per queue at run-time since we don't know the
271 * number of queues at compile-time.
273 static int igb_alloc_queues(struct igb_adapter
*adapter
)
277 adapter
->tx_ring
= kcalloc(adapter
->num_tx_queues
,
278 sizeof(struct igb_ring
), GFP_KERNEL
);
279 if (!adapter
->tx_ring
)
282 adapter
->rx_ring
= kcalloc(adapter
->num_rx_queues
,
283 sizeof(struct igb_ring
), GFP_KERNEL
);
284 if (!adapter
->rx_ring
) {
285 kfree(adapter
->tx_ring
);
289 adapter
->rx_ring
->buddy
= adapter
->tx_ring
;
291 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
292 struct igb_ring
*ring
= &(adapter
->tx_ring
[i
]);
293 ring
->count
= adapter
->tx_ring_count
;
294 ring
->adapter
= adapter
;
295 ring
->queue_index
= i
;
297 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
298 struct igb_ring
*ring
= &(adapter
->rx_ring
[i
]);
299 ring
->count
= adapter
->rx_ring_count
;
300 ring
->adapter
= adapter
;
301 ring
->queue_index
= i
;
302 ring
->itr_register
= E1000_ITR
;
304 /* set a default napi handler for each rx_ring */
305 netif_napi_add(adapter
->netdev
, &ring
->napi
, igb_poll
, 64);
308 igb_cache_ring_register(adapter
);
312 static void igb_free_queues(struct igb_adapter
*adapter
)
316 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
317 netif_napi_del(&adapter
->rx_ring
[i
].napi
);
319 kfree(adapter
->tx_ring
);
320 kfree(adapter
->rx_ring
);
323 #define IGB_N0_QUEUE -1
324 static void igb_assign_vector(struct igb_adapter
*adapter
, int rx_queue
,
325 int tx_queue
, int msix_vector
)
328 struct e1000_hw
*hw
= &adapter
->hw
;
331 switch (hw
->mac
.type
) {
333 /* The 82575 assigns vectors using a bitmask, which matches the
334 bitmask for the EICR/EIMS/EIMC registers. To assign one
335 or more queues to a vector, we write the appropriate bits
336 into the MSIXBM register for that vector. */
337 if (rx_queue
> IGB_N0_QUEUE
) {
338 msixbm
= E1000_EICR_RX_QUEUE0
<< rx_queue
;
339 adapter
->rx_ring
[rx_queue
].eims_value
= msixbm
;
341 if (tx_queue
> IGB_N0_QUEUE
) {
342 msixbm
|= E1000_EICR_TX_QUEUE0
<< tx_queue
;
343 adapter
->tx_ring
[tx_queue
].eims_value
=
344 E1000_EICR_TX_QUEUE0
<< tx_queue
;
346 array_wr32(E1000_MSIXBM(0), msix_vector
, msixbm
);
349 /* 82576 uses a table-based method for assigning vectors.
350 Each queue has a single entry in the table to which we write
351 a vector number along with a "valid" bit. Sadly, the layout
352 of the table is somewhat counterintuitive. */
353 if (rx_queue
> IGB_N0_QUEUE
) {
354 index
= (rx_queue
>> 1);
355 ivar
= array_rd32(E1000_IVAR0
, index
);
356 if (rx_queue
& 0x1) {
357 /* vector goes into third byte of register */
358 ivar
= ivar
& 0xFF00FFFF;
359 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 16;
361 /* vector goes into low byte of register */
362 ivar
= ivar
& 0xFFFFFF00;
363 ivar
|= msix_vector
| E1000_IVAR_VALID
;
365 adapter
->rx_ring
[rx_queue
].eims_value
= 1 << msix_vector
;
366 array_wr32(E1000_IVAR0
, index
, ivar
);
368 if (tx_queue
> IGB_N0_QUEUE
) {
369 index
= (tx_queue
>> 1);
370 ivar
= array_rd32(E1000_IVAR0
, index
);
371 if (tx_queue
& 0x1) {
372 /* vector goes into high byte of register */
373 ivar
= ivar
& 0x00FFFFFF;
374 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 24;
376 /* vector goes into second byte of register */
377 ivar
= ivar
& 0xFFFF00FF;
378 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 8;
380 adapter
->tx_ring
[tx_queue
].eims_value
= 1 << msix_vector
;
381 array_wr32(E1000_IVAR0
, index
, ivar
);
391 * igb_configure_msix - Configure MSI-X hardware
393 * igb_configure_msix sets up the hardware to properly
394 * generate MSI-X interrupts.
396 static void igb_configure_msix(struct igb_adapter
*adapter
)
400 struct e1000_hw
*hw
= &adapter
->hw
;
402 adapter
->eims_enable_mask
= 0;
403 if (hw
->mac
.type
== e1000_82576
)
404 /* Turn on MSI-X capability first, or our settings
405 * won't stick. And it will take days to debug. */
406 wr32(E1000_GPIE
, E1000_GPIE_MSIX_MODE
|
407 E1000_GPIE_PBA
| E1000_GPIE_EIAME
|
410 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
411 struct igb_ring
*tx_ring
= &adapter
->tx_ring
[i
];
412 igb_assign_vector(adapter
, IGB_N0_QUEUE
, i
, vector
++);
413 adapter
->eims_enable_mask
|= tx_ring
->eims_value
;
414 if (tx_ring
->itr_val
)
415 writel(tx_ring
->itr_val
,
416 hw
->hw_addr
+ tx_ring
->itr_register
);
418 writel(1, hw
->hw_addr
+ tx_ring
->itr_register
);
421 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
422 struct igb_ring
*rx_ring
= &adapter
->rx_ring
[i
];
423 rx_ring
->buddy
= NULL
;
424 igb_assign_vector(adapter
, i
, IGB_N0_QUEUE
, vector
++);
425 adapter
->eims_enable_mask
|= rx_ring
->eims_value
;
426 if (rx_ring
->itr_val
)
427 writel(rx_ring
->itr_val
,
428 hw
->hw_addr
+ rx_ring
->itr_register
);
430 writel(1, hw
->hw_addr
+ rx_ring
->itr_register
);
434 /* set vector for other causes, i.e. link changes */
435 switch (hw
->mac
.type
) {
437 array_wr32(E1000_MSIXBM(0), vector
++,
440 tmp
= rd32(E1000_CTRL_EXT
);
441 /* enable MSI-X PBA support*/
442 tmp
|= E1000_CTRL_EXT_PBA_CLR
;
444 /* Auto-Mask interrupts upon ICR read. */
445 tmp
|= E1000_CTRL_EXT_EIAME
;
446 tmp
|= E1000_CTRL_EXT_IRCA
;
448 wr32(E1000_CTRL_EXT
, tmp
);
449 adapter
->eims_enable_mask
|= E1000_EIMS_OTHER
;
450 adapter
->eims_other
= E1000_EIMS_OTHER
;
455 tmp
= (vector
++ | E1000_IVAR_VALID
) << 8;
456 wr32(E1000_IVAR_MISC
, tmp
);
458 adapter
->eims_enable_mask
= (1 << (vector
)) - 1;
459 adapter
->eims_other
= 1 << (vector
- 1);
462 /* do nothing, since nothing else supports MSI-X */
464 } /* switch (hw->mac.type) */
469 * igb_request_msix - Initialize MSI-X interrupts
471 * igb_request_msix allocates MSI-X vectors and requests interrupts from the
474 static int igb_request_msix(struct igb_adapter
*adapter
)
476 struct net_device
*netdev
= adapter
->netdev
;
477 int i
, err
= 0, vector
= 0;
481 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
482 struct igb_ring
*ring
= &(adapter
->tx_ring
[i
]);
483 sprintf(ring
->name
, "%s-tx-%d", netdev
->name
, i
);
484 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
485 &igb_msix_tx
, 0, ring
->name
,
486 &(adapter
->tx_ring
[i
]));
489 ring
->itr_register
= E1000_EITR(0) + (vector
<< 2);
490 ring
->itr_val
= 976; /* ~4000 ints/sec */
493 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
494 struct igb_ring
*ring
= &(adapter
->rx_ring
[i
]);
495 if (strlen(netdev
->name
) < (IFNAMSIZ
- 5))
496 sprintf(ring
->name
, "%s-rx-%d", netdev
->name
, i
);
498 memcpy(ring
->name
, netdev
->name
, IFNAMSIZ
);
499 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
500 &igb_msix_rx
, 0, ring
->name
,
501 &(adapter
->rx_ring
[i
]));
504 ring
->itr_register
= E1000_EITR(0) + (vector
<< 2);
505 ring
->itr_val
= adapter
->itr
;
506 /* overwrite the poll routine for MSIX, we've already done
508 ring
->napi
.poll
= &igb_clean_rx_ring_msix
;
512 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
513 &igb_msix_other
, 0, netdev
->name
, netdev
);
517 igb_configure_msix(adapter
);
523 static void igb_reset_interrupt_capability(struct igb_adapter
*adapter
)
525 if (adapter
->msix_entries
) {
526 pci_disable_msix(adapter
->pdev
);
527 kfree(adapter
->msix_entries
);
528 adapter
->msix_entries
= NULL
;
529 } else if (adapter
->flags
& IGB_FLAG_HAS_MSI
)
530 pci_disable_msi(adapter
->pdev
);
536 * igb_set_interrupt_capability - set MSI or MSI-X if supported
538 * Attempt to configure interrupts using the best available
539 * capabilities of the hardware and kernel.
541 static void igb_set_interrupt_capability(struct igb_adapter
*adapter
)
546 /* Number of supported queues. */
547 /* Having more queues than CPUs doesn't make sense. */
548 adapter
->num_rx_queues
= min_t(u32
, IGB_MAX_RX_QUEUES
, num_online_cpus());
549 adapter
->num_tx_queues
= min_t(u32
, IGB_MAX_TX_QUEUES
, num_online_cpus());
551 numvecs
= adapter
->num_tx_queues
+ adapter
->num_rx_queues
+ 1;
552 adapter
->msix_entries
= kcalloc(numvecs
, sizeof(struct msix_entry
),
554 if (!adapter
->msix_entries
)
557 for (i
= 0; i
< numvecs
; i
++)
558 adapter
->msix_entries
[i
].entry
= i
;
560 err
= pci_enable_msix(adapter
->pdev
,
561 adapter
->msix_entries
,
566 igb_reset_interrupt_capability(adapter
);
568 /* If we can't do MSI-X, try MSI */
570 adapter
->num_rx_queues
= 1;
571 adapter
->num_tx_queues
= 1;
572 if (!pci_enable_msi(adapter
->pdev
))
573 adapter
->flags
|= IGB_FLAG_HAS_MSI
;
575 /* Notify the stack of the (possibly) reduced Tx Queue count. */
576 adapter
->netdev
->real_num_tx_queues
= adapter
->num_tx_queues
;
581 * igb_request_irq - initialize interrupts
583 * Attempts to configure interrupts using the best available
584 * capabilities of the hardware and kernel.
586 static int igb_request_irq(struct igb_adapter
*adapter
)
588 struct net_device
*netdev
= adapter
->netdev
;
589 struct e1000_hw
*hw
= &adapter
->hw
;
592 if (adapter
->msix_entries
) {
593 err
= igb_request_msix(adapter
);
596 /* fall back to MSI */
597 igb_reset_interrupt_capability(adapter
);
598 if (!pci_enable_msi(adapter
->pdev
))
599 adapter
->flags
|= IGB_FLAG_HAS_MSI
;
600 igb_free_all_tx_resources(adapter
);
601 igb_free_all_rx_resources(adapter
);
602 adapter
->num_rx_queues
= 1;
603 igb_alloc_queues(adapter
);
605 switch (hw
->mac
.type
) {
607 wr32(E1000_MSIXBM(0),
608 (E1000_EICR_RX_QUEUE0
| E1000_EIMS_OTHER
));
611 wr32(E1000_IVAR0
, E1000_IVAR_VALID
);
618 if (adapter
->flags
& IGB_FLAG_HAS_MSI
) {
619 err
= request_irq(adapter
->pdev
->irq
, &igb_intr_msi
, 0,
620 netdev
->name
, netdev
);
623 /* fall back to legacy interrupts */
624 igb_reset_interrupt_capability(adapter
);
625 adapter
->flags
&= ~IGB_FLAG_HAS_MSI
;
628 err
= request_irq(adapter
->pdev
->irq
, &igb_intr
, IRQF_SHARED
,
629 netdev
->name
, netdev
);
632 dev_err(&adapter
->pdev
->dev
, "Error %d getting interrupt\n",
639 static void igb_free_irq(struct igb_adapter
*adapter
)
641 struct net_device
*netdev
= adapter
->netdev
;
643 if (adapter
->msix_entries
) {
646 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
647 free_irq(adapter
->msix_entries
[vector
++].vector
,
648 &(adapter
->tx_ring
[i
]));
649 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
650 free_irq(adapter
->msix_entries
[vector
++].vector
,
651 &(adapter
->rx_ring
[i
]));
653 free_irq(adapter
->msix_entries
[vector
++].vector
, netdev
);
657 free_irq(adapter
->pdev
->irq
, netdev
);
661 * igb_irq_disable - Mask off interrupt generation on the NIC
662 * @adapter: board private structure
664 static void igb_irq_disable(struct igb_adapter
*adapter
)
666 struct e1000_hw
*hw
= &adapter
->hw
;
668 if (adapter
->msix_entries
) {
670 wr32(E1000_EIMC
, ~0);
677 synchronize_irq(adapter
->pdev
->irq
);
681 * igb_irq_enable - Enable default interrupt generation settings
682 * @adapter: board private structure
684 static void igb_irq_enable(struct igb_adapter
*adapter
)
686 struct e1000_hw
*hw
= &adapter
->hw
;
688 if (adapter
->msix_entries
) {
689 wr32(E1000_EIAC
, adapter
->eims_enable_mask
);
690 wr32(E1000_EIAM
, adapter
->eims_enable_mask
);
691 wr32(E1000_EIMS
, adapter
->eims_enable_mask
);
692 wr32(E1000_IMS
, E1000_IMS_LSC
| E1000_IMS_DOUTSYNC
);
694 wr32(E1000_IMS
, IMS_ENABLE_MASK
);
695 wr32(E1000_IAM
, IMS_ENABLE_MASK
);
699 static void igb_update_mng_vlan(struct igb_adapter
*adapter
)
701 struct net_device
*netdev
= adapter
->netdev
;
702 u16 vid
= adapter
->hw
.mng_cookie
.vlan_id
;
703 u16 old_vid
= adapter
->mng_vlan_id
;
704 if (adapter
->vlgrp
) {
705 if (!vlan_group_get_device(adapter
->vlgrp
, vid
)) {
706 if (adapter
->hw
.mng_cookie
.status
&
707 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) {
708 igb_vlan_rx_add_vid(netdev
, vid
);
709 adapter
->mng_vlan_id
= vid
;
711 adapter
->mng_vlan_id
= IGB_MNG_VLAN_NONE
;
713 if ((old_vid
!= (u16
)IGB_MNG_VLAN_NONE
) &&
715 !vlan_group_get_device(adapter
->vlgrp
, old_vid
))
716 igb_vlan_rx_kill_vid(netdev
, old_vid
);
718 adapter
->mng_vlan_id
= vid
;
723 * igb_release_hw_control - release control of the h/w to f/w
724 * @adapter: address of board private structure
726 * igb_release_hw_control resets CTRL_EXT:DRV_LOAD bit.
727 * For ASF and Pass Through versions of f/w this means that the
728 * driver is no longer loaded.
731 static void igb_release_hw_control(struct igb_adapter
*adapter
)
733 struct e1000_hw
*hw
= &adapter
->hw
;
736 /* Let firmware take over control of h/w */
737 ctrl_ext
= rd32(E1000_CTRL_EXT
);
739 ctrl_ext
& ~E1000_CTRL_EXT_DRV_LOAD
);
744 * igb_get_hw_control - get control of the h/w from f/w
745 * @adapter: address of board private structure
747 * igb_get_hw_control sets CTRL_EXT:DRV_LOAD bit.
748 * For ASF and Pass Through versions of f/w this means that
749 * the driver is loaded.
752 static void igb_get_hw_control(struct igb_adapter
*adapter
)
754 struct e1000_hw
*hw
= &adapter
->hw
;
757 /* Let firmware know the driver has taken over */
758 ctrl_ext
= rd32(E1000_CTRL_EXT
);
760 ctrl_ext
| E1000_CTRL_EXT_DRV_LOAD
);
764 * igb_configure - configure the hardware for RX and TX
765 * @adapter: private board structure
767 static void igb_configure(struct igb_adapter
*adapter
)
769 struct net_device
*netdev
= adapter
->netdev
;
772 igb_get_hw_control(adapter
);
773 igb_set_multi(netdev
);
775 igb_restore_vlan(adapter
);
777 igb_configure_tx(adapter
);
778 igb_setup_rctl(adapter
);
779 igb_configure_rx(adapter
);
781 igb_rx_fifo_flush_82575(&adapter
->hw
);
783 /* call IGB_DESC_UNUSED which always leaves
784 * at least 1 descriptor unused to make sure
785 * next_to_use != next_to_clean */
786 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
787 struct igb_ring
*ring
= &adapter
->rx_ring
[i
];
788 igb_alloc_rx_buffers_adv(ring
, IGB_DESC_UNUSED(ring
));
792 adapter
->tx_queue_len
= netdev
->tx_queue_len
;
797 * igb_up - Open the interface and prepare it to handle traffic
798 * @adapter: board private structure
801 int igb_up(struct igb_adapter
*adapter
)
803 struct e1000_hw
*hw
= &adapter
->hw
;
806 /* hardware has been reset, we need to reload some things */
807 igb_configure(adapter
);
809 clear_bit(__IGB_DOWN
, &adapter
->state
);
811 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
812 napi_enable(&adapter
->rx_ring
[i
].napi
);
813 if (adapter
->msix_entries
)
814 igb_configure_msix(adapter
);
816 /* Clear any pending interrupts. */
818 igb_irq_enable(adapter
);
820 /* Fire a link change interrupt to start the watchdog. */
821 wr32(E1000_ICS
, E1000_ICS_LSC
);
825 void igb_down(struct igb_adapter
*adapter
)
827 struct e1000_hw
*hw
= &adapter
->hw
;
828 struct net_device
*netdev
= adapter
->netdev
;
832 /* signal that we're down so the interrupt handler does not
833 * reschedule our watchdog timer */
834 set_bit(__IGB_DOWN
, &adapter
->state
);
836 /* disable receives in the hardware */
837 rctl
= rd32(E1000_RCTL
);
838 wr32(E1000_RCTL
, rctl
& ~E1000_RCTL_EN
);
839 /* flush and sleep below */
841 netif_tx_stop_all_queues(netdev
);
843 /* disable transmits in the hardware */
844 tctl
= rd32(E1000_TCTL
);
845 tctl
&= ~E1000_TCTL_EN
;
846 wr32(E1000_TCTL
, tctl
);
847 /* flush both disables and wait for them to finish */
851 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
852 napi_disable(&adapter
->rx_ring
[i
].napi
);
854 igb_irq_disable(adapter
);
856 del_timer_sync(&adapter
->watchdog_timer
);
857 del_timer_sync(&adapter
->phy_info_timer
);
859 netdev
->tx_queue_len
= adapter
->tx_queue_len
;
860 netif_carrier_off(netdev
);
861 adapter
->link_speed
= 0;
862 adapter
->link_duplex
= 0;
864 if (!pci_channel_offline(adapter
->pdev
))
866 igb_clean_all_tx_rings(adapter
);
867 igb_clean_all_rx_rings(adapter
);
870 void igb_reinit_locked(struct igb_adapter
*adapter
)
872 WARN_ON(in_interrupt());
873 while (test_and_set_bit(__IGB_RESETTING
, &adapter
->state
))
877 clear_bit(__IGB_RESETTING
, &adapter
->state
);
880 void igb_reset(struct igb_adapter
*adapter
)
882 struct e1000_hw
*hw
= &adapter
->hw
;
883 struct e1000_mac_info
*mac
= &hw
->mac
;
884 struct e1000_fc_info
*fc
= &hw
->fc
;
885 u32 pba
= 0, tx_space
, min_tx_space
, min_rx_space
;
888 /* Repartition Pba for greater than 9k mtu
889 * To take effect CTRL.RST is required.
891 if (mac
->type
!= e1000_82576
) {
898 if ((adapter
->max_frame_size
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) &&
899 (mac
->type
< e1000_82576
)) {
900 /* adjust PBA for jumbo frames */
901 wr32(E1000_PBA
, pba
);
903 /* To maintain wire speed transmits, the Tx FIFO should be
904 * large enough to accommodate two full transmit packets,
905 * rounded up to the next 1KB and expressed in KB. Likewise,
906 * the Rx FIFO should be large enough to accommodate at least
907 * one full receive packet and is similarly rounded up and
908 * expressed in KB. */
909 pba
= rd32(E1000_PBA
);
910 /* upper 16 bits has Tx packet buffer allocation size in KB */
911 tx_space
= pba
>> 16;
912 /* lower 16 bits has Rx packet buffer allocation size in KB */
914 /* the tx fifo also stores 16 bytes of information about the tx
915 * but don't include ethernet FCS because hardware appends it */
916 min_tx_space
= (adapter
->max_frame_size
+
917 sizeof(struct e1000_tx_desc
) -
919 min_tx_space
= ALIGN(min_tx_space
, 1024);
921 /* software strips receive CRC, so leave room for it */
922 min_rx_space
= adapter
->max_frame_size
;
923 min_rx_space
= ALIGN(min_rx_space
, 1024);
926 /* If current Tx allocation is less than the min Tx FIFO size,
927 * and the min Tx FIFO size is less than the current Rx FIFO
928 * allocation, take space away from current Rx allocation */
929 if (tx_space
< min_tx_space
&&
930 ((min_tx_space
- tx_space
) < pba
)) {
931 pba
= pba
- (min_tx_space
- tx_space
);
933 /* if short on rx space, rx wins and must trump tx
935 if (pba
< min_rx_space
)
938 wr32(E1000_PBA
, pba
);
941 /* flow control settings */
942 /* The high water mark must be low enough to fit one full frame
943 * (or the size used for early receive) above it in the Rx FIFO.
944 * Set it to the lower of:
945 * - 90% of the Rx FIFO size, or
946 * - the full Rx FIFO size minus one full frame */
947 hwm
= min(((pba
<< 10) * 9 / 10),
948 ((pba
<< 10) - 2 * adapter
->max_frame_size
));
950 if (mac
->type
< e1000_82576
) {
951 fc
->high_water
= hwm
& 0xFFF8; /* 8-byte granularity */
952 fc
->low_water
= fc
->high_water
- 8;
954 fc
->high_water
= hwm
& 0xFFF0; /* 16-byte granularity */
955 fc
->low_water
= fc
->high_water
- 16;
957 fc
->pause_time
= 0xFFFF;
959 fc
->type
= fc
->original_type
;
961 /* Allow time for pending master requests to run */
962 adapter
->hw
.mac
.ops
.reset_hw(&adapter
->hw
);
965 if (adapter
->hw
.mac
.ops
.init_hw(&adapter
->hw
))
966 dev_err(&adapter
->pdev
->dev
, "Hardware Error\n");
968 igb_update_mng_vlan(adapter
);
970 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
971 wr32(E1000_VET
, ETHERNET_IEEE_VLAN_TYPE
);
973 igb_reset_adaptive(&adapter
->hw
);
974 igb_get_phy_info(&adapter
->hw
);
977 static const struct net_device_ops igb_netdev_ops
= {
978 .ndo_open
= igb_open
,
979 .ndo_stop
= igb_close
,
980 .ndo_start_xmit
= igb_xmit_frame_adv
,
981 .ndo_get_stats
= igb_get_stats
,
982 .ndo_set_multicast_list
= igb_set_multi
,
983 .ndo_set_mac_address
= igb_set_mac
,
984 .ndo_change_mtu
= igb_change_mtu
,
985 .ndo_do_ioctl
= igb_ioctl
,
986 .ndo_tx_timeout
= igb_tx_timeout
,
987 .ndo_validate_addr
= eth_validate_addr
,
988 .ndo_vlan_rx_register
= igb_vlan_rx_register
,
989 .ndo_vlan_rx_add_vid
= igb_vlan_rx_add_vid
,
990 .ndo_vlan_rx_kill_vid
= igb_vlan_rx_kill_vid
,
991 #ifdef CONFIG_NET_POLL_CONTROLLER
992 .ndo_poll_controller
= igb_netpoll
,
997 * igb_probe - Device Initialization Routine
998 * @pdev: PCI device information struct
999 * @ent: entry in igb_pci_tbl
1001 * Returns 0 on success, negative on failure
1003 * igb_probe initializes an adapter identified by a pci_dev structure.
1004 * The OS initialization, configuring of the adapter private structure,
1005 * and a hardware reset occur.
1007 static int __devinit
igb_probe(struct pci_dev
*pdev
,
1008 const struct pci_device_id
*ent
)
1010 struct net_device
*netdev
;
1011 struct igb_adapter
*adapter
;
1012 struct e1000_hw
*hw
;
1013 struct pci_dev
*us_dev
;
1014 const struct e1000_info
*ei
= igb_info_tbl
[ent
->driver_data
];
1015 unsigned long mmio_start
, mmio_len
;
1016 int i
, err
, pci_using_dac
, pos
;
1017 u16 eeprom_data
= 0, state
= 0;
1018 u16 eeprom_apme_mask
= IGB_EEPROM_APME
;
1021 err
= pci_enable_device_mem(pdev
);
1026 err
= pci_set_dma_mask(pdev
, DMA_64BIT_MASK
);
1028 err
= pci_set_consistent_dma_mask(pdev
, DMA_64BIT_MASK
);
1032 err
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
);
1034 err
= pci_set_consistent_dma_mask(pdev
, DMA_32BIT_MASK
);
1036 dev_err(&pdev
->dev
, "No usable DMA "
1037 "configuration, aborting\n");
1043 /* 82575 requires that the pci-e link partner disable the L0s state */
1044 switch (pdev
->device
) {
1045 case E1000_DEV_ID_82575EB_COPPER
:
1046 case E1000_DEV_ID_82575EB_FIBER_SERDES
:
1047 case E1000_DEV_ID_82575GB_QUAD_COPPER
:
1048 us_dev
= pdev
->bus
->self
;
1049 pos
= pci_find_capability(us_dev
, PCI_CAP_ID_EXP
);
1051 pci_read_config_word(us_dev
, pos
+ PCI_EXP_LNKCTL
,
1053 state
&= ~PCIE_LINK_STATE_L0S
;
1054 pci_write_config_word(us_dev
, pos
+ PCI_EXP_LNKCTL
,
1056 dev_info(&pdev
->dev
,
1057 "Disabling ASPM L0s upstream switch port %s\n",
1064 err
= pci_request_selected_regions(pdev
, pci_select_bars(pdev
,
1070 err
= pci_enable_pcie_error_reporting(pdev
);
1072 dev_err(&pdev
->dev
, "pci_enable_pcie_error_reporting failed "
1074 /* non-fatal, continue */
1077 pci_set_master(pdev
);
1078 pci_save_state(pdev
);
1081 netdev
= alloc_etherdev_mq(sizeof(struct igb_adapter
), IGB_MAX_TX_QUEUES
);
1083 goto err_alloc_etherdev
;
1085 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
1087 pci_set_drvdata(pdev
, netdev
);
1088 adapter
= netdev_priv(netdev
);
1089 adapter
->netdev
= netdev
;
1090 adapter
->pdev
= pdev
;
1093 adapter
->msg_enable
= NETIF_MSG_DRV
| NETIF_MSG_PROBE
;
1095 mmio_start
= pci_resource_start(pdev
, 0);
1096 mmio_len
= pci_resource_len(pdev
, 0);
1099 hw
->hw_addr
= ioremap(mmio_start
, mmio_len
);
1103 netdev
->netdev_ops
= &igb_netdev_ops
;
1104 igb_set_ethtool_ops(netdev
);
1105 netdev
->watchdog_timeo
= 5 * HZ
;
1107 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
1109 netdev
->mem_start
= mmio_start
;
1110 netdev
->mem_end
= mmio_start
+ mmio_len
;
1112 /* PCI config space info */
1113 hw
->vendor_id
= pdev
->vendor
;
1114 hw
->device_id
= pdev
->device
;
1115 hw
->revision_id
= pdev
->revision
;
1116 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
1117 hw
->subsystem_device_id
= pdev
->subsystem_device
;
1119 /* setup the private structure */
1121 /* Copy the default MAC, PHY and NVM function pointers */
1122 memcpy(&hw
->mac
.ops
, ei
->mac_ops
, sizeof(hw
->mac
.ops
));
1123 memcpy(&hw
->phy
.ops
, ei
->phy_ops
, sizeof(hw
->phy
.ops
));
1124 memcpy(&hw
->nvm
.ops
, ei
->nvm_ops
, sizeof(hw
->nvm
.ops
));
1125 /* Initialize skew-specific constants */
1126 err
= ei
->get_invariants(hw
);
1130 err
= igb_sw_init(adapter
);
1134 igb_get_bus_info_pcie(hw
);
1137 switch (hw
->mac
.type
) {
1139 adapter
->flags
|= IGB_FLAG_NEED_CTX_IDX
;
1146 hw
->phy
.autoneg_wait_to_complete
= false;
1147 hw
->mac
.adaptive_ifs
= true;
1149 /* Copper options */
1150 if (hw
->phy
.media_type
== e1000_media_type_copper
) {
1151 hw
->phy
.mdix
= AUTO_ALL_MODES
;
1152 hw
->phy
.disable_polarity_correction
= false;
1153 hw
->phy
.ms_type
= e1000_ms_hw_default
;
1156 if (igb_check_reset_block(hw
))
1157 dev_info(&pdev
->dev
,
1158 "PHY reset is blocked due to SOL/IDER session.\n");
1160 netdev
->features
= NETIF_F_SG
|
1162 NETIF_F_HW_VLAN_TX
|
1163 NETIF_F_HW_VLAN_RX
|
1164 NETIF_F_HW_VLAN_FILTER
;
1166 netdev
->features
|= NETIF_F_IPV6_CSUM
;
1167 netdev
->features
|= NETIF_F_TSO
;
1168 netdev
->features
|= NETIF_F_TSO6
;
1170 #ifdef CONFIG_IGB_LRO
1171 netdev
->features
|= NETIF_F_GRO
;
1174 netdev
->vlan_features
|= NETIF_F_TSO
;
1175 netdev
->vlan_features
|= NETIF_F_TSO6
;
1176 netdev
->vlan_features
|= NETIF_F_IP_CSUM
;
1177 netdev
->vlan_features
|= NETIF_F_SG
;
1180 netdev
->features
|= NETIF_F_HIGHDMA
;
1182 adapter
->en_mng_pt
= igb_enable_mng_pass_thru(&adapter
->hw
);
1184 /* before reading the NVM, reset the controller to put the device in a
1185 * known good starting state */
1186 hw
->mac
.ops
.reset_hw(hw
);
1188 /* make sure the NVM is good */
1189 if (igb_validate_nvm_checksum(hw
) < 0) {
1190 dev_err(&pdev
->dev
, "The NVM Checksum Is Not Valid\n");
1195 /* copy the MAC address out of the NVM */
1196 if (hw
->mac
.ops
.read_mac_addr(hw
))
1197 dev_err(&pdev
->dev
, "NVM Read Error\n");
1199 memcpy(netdev
->dev_addr
, hw
->mac
.addr
, netdev
->addr_len
);
1200 memcpy(netdev
->perm_addr
, hw
->mac
.addr
, netdev
->addr_len
);
1202 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
1203 dev_err(&pdev
->dev
, "Invalid MAC Address\n");
1208 init_timer(&adapter
->watchdog_timer
);
1209 adapter
->watchdog_timer
.function
= &igb_watchdog
;
1210 adapter
->watchdog_timer
.data
= (unsigned long) adapter
;
1212 init_timer(&adapter
->phy_info_timer
);
1213 adapter
->phy_info_timer
.function
= &igb_update_phy_info
;
1214 adapter
->phy_info_timer
.data
= (unsigned long) adapter
;
1216 INIT_WORK(&adapter
->reset_task
, igb_reset_task
);
1217 INIT_WORK(&adapter
->watchdog_task
, igb_watchdog_task
);
1219 /* Initialize link & ring properties that are user-changeable */
1220 adapter
->tx_ring
->count
= 256;
1221 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
1222 adapter
->tx_ring
[i
].count
= adapter
->tx_ring
->count
;
1223 adapter
->rx_ring
->count
= 256;
1224 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
1225 adapter
->rx_ring
[i
].count
= adapter
->rx_ring
->count
;
1227 adapter
->fc_autoneg
= true;
1228 hw
->mac
.autoneg
= true;
1229 hw
->phy
.autoneg_advertised
= 0x2f;
1231 hw
->fc
.original_type
= e1000_fc_default
;
1232 hw
->fc
.type
= e1000_fc_default
;
1234 adapter
->itr_setting
= 3;
1235 adapter
->itr
= IGB_START_ITR
;
1237 igb_validate_mdi_setting(hw
);
1239 adapter
->rx_csum
= 1;
1241 /* Initial Wake on LAN setting If APM wake is enabled in the EEPROM,
1242 * enable the ACPI Magic Packet filter
1245 if (hw
->bus
.func
== 0 ||
1246 hw
->device_id
== E1000_DEV_ID_82575EB_COPPER
)
1247 hw
->nvm
.ops
.read(hw
, NVM_INIT_CONTROL3_PORT_A
, 1, &eeprom_data
);
1249 if (eeprom_data
& eeprom_apme_mask
)
1250 adapter
->eeprom_wol
|= E1000_WUFC_MAG
;
1252 /* now that we have the eeprom settings, apply the special cases where
1253 * the eeprom may be wrong or the board simply won't support wake on
1254 * lan on a particular port */
1255 switch (pdev
->device
) {
1256 case E1000_DEV_ID_82575GB_QUAD_COPPER
:
1257 adapter
->eeprom_wol
= 0;
1259 case E1000_DEV_ID_82575EB_FIBER_SERDES
:
1260 case E1000_DEV_ID_82576_FIBER
:
1261 case E1000_DEV_ID_82576_SERDES
:
1262 /* Wake events only supported on port A for dual fiber
1263 * regardless of eeprom setting */
1264 if (rd32(E1000_STATUS
) & E1000_STATUS_FUNC_1
)
1265 adapter
->eeprom_wol
= 0;
1269 /* initialize the wol settings based on the eeprom settings */
1270 adapter
->wol
= adapter
->eeprom_wol
;
1271 device_set_wakeup_enable(&adapter
->pdev
->dev
, adapter
->wol
);
1273 /* reset the hardware with the new settings */
1276 /* let the f/w know that the h/w is now under the control of the
1278 igb_get_hw_control(adapter
);
1280 /* tell the stack to leave us alone until igb_open() is called */
1281 netif_carrier_off(netdev
);
1282 netif_tx_stop_all_queues(netdev
);
1284 strcpy(netdev
->name
, "eth%d");
1285 err
= register_netdev(netdev
);
1289 #ifdef CONFIG_IGB_DCA
1290 if (dca_add_requester(&pdev
->dev
) == 0) {
1291 adapter
->flags
|= IGB_FLAG_DCA_ENABLED
;
1292 dev_info(&pdev
->dev
, "DCA enabled\n");
1293 /* Always use CB2 mode, difference is masked
1294 * in the CB driver. */
1295 wr32(E1000_DCA_CTRL
, 2);
1296 igb_setup_dca(adapter
);
1300 dev_info(&pdev
->dev
, "Intel(R) Gigabit Ethernet Network Connection\n");
1301 /* print bus type/speed/width info */
1302 dev_info(&pdev
->dev
, "%s: (PCIe:%s:%s) %pM\n",
1304 ((hw
->bus
.speed
== e1000_bus_speed_2500
)
1305 ? "2.5Gb/s" : "unknown"),
1306 ((hw
->bus
.width
== e1000_bus_width_pcie_x4
)
1307 ? "Width x4" : (hw
->bus
.width
== e1000_bus_width_pcie_x1
)
1308 ? "Width x1" : "unknown"),
1311 igb_read_part_num(hw
, &part_num
);
1312 dev_info(&pdev
->dev
, "%s: PBA No: %06x-%03x\n", netdev
->name
,
1313 (part_num
>> 8), (part_num
& 0xff));
1315 dev_info(&pdev
->dev
,
1316 "Using %s interrupts. %d rx queue(s), %d tx queue(s)\n",
1317 adapter
->msix_entries
? "MSI-X" :
1318 (adapter
->flags
& IGB_FLAG_HAS_MSI
) ? "MSI" : "legacy",
1319 adapter
->num_rx_queues
, adapter
->num_tx_queues
);
1324 igb_release_hw_control(adapter
);
1326 if (!igb_check_reset_block(hw
))
1329 if (hw
->flash_address
)
1330 iounmap(hw
->flash_address
);
1332 igb_free_queues(adapter
);
1335 iounmap(hw
->hw_addr
);
1337 free_netdev(netdev
);
1339 pci_release_selected_regions(pdev
, pci_select_bars(pdev
,
1343 pci_disable_device(pdev
);
1348 * igb_remove - Device Removal Routine
1349 * @pdev: PCI device information struct
1351 * igb_remove is called by the PCI subsystem to alert the driver
1352 * that it should release a PCI device. The could be caused by a
1353 * Hot-Plug event, or because the driver is going to be removed from
1356 static void __devexit
igb_remove(struct pci_dev
*pdev
)
1358 struct net_device
*netdev
= pci_get_drvdata(pdev
);
1359 struct igb_adapter
*adapter
= netdev_priv(netdev
);
1360 struct e1000_hw
*hw
= &adapter
->hw
;
1363 /* flush_scheduled work may reschedule our watchdog task, so
1364 * explicitly disable watchdog tasks from being rescheduled */
1365 set_bit(__IGB_DOWN
, &adapter
->state
);
1366 del_timer_sync(&adapter
->watchdog_timer
);
1367 del_timer_sync(&adapter
->phy_info_timer
);
1369 flush_scheduled_work();
1371 #ifdef CONFIG_IGB_DCA
1372 if (adapter
->flags
& IGB_FLAG_DCA_ENABLED
) {
1373 dev_info(&pdev
->dev
, "DCA disabled\n");
1374 dca_remove_requester(&pdev
->dev
);
1375 adapter
->flags
&= ~IGB_FLAG_DCA_ENABLED
;
1376 wr32(E1000_DCA_CTRL
, 1);
1380 /* Release control of h/w to f/w. If f/w is AMT enabled, this
1381 * would have already happened in close and is redundant. */
1382 igb_release_hw_control(adapter
);
1384 unregister_netdev(netdev
);
1386 if (!igb_check_reset_block(&adapter
->hw
))
1387 igb_reset_phy(&adapter
->hw
);
1389 igb_reset_interrupt_capability(adapter
);
1391 igb_free_queues(adapter
);
1393 iounmap(hw
->hw_addr
);
1394 if (hw
->flash_address
)
1395 iounmap(hw
->flash_address
);
1396 pci_release_selected_regions(pdev
, pci_select_bars(pdev
,
1399 free_netdev(netdev
);
1401 err
= pci_disable_pcie_error_reporting(pdev
);
1404 "pci_disable_pcie_error_reporting failed 0x%x\n", err
);
1406 pci_disable_device(pdev
);
1410 * igb_sw_init - Initialize general software structures (struct igb_adapter)
1411 * @adapter: board private structure to initialize
1413 * igb_sw_init initializes the Adapter private data structure.
1414 * Fields are initialized based on PCI device information and
1415 * OS network device settings (MTU size).
1417 static int __devinit
igb_sw_init(struct igb_adapter
*adapter
)
1419 struct e1000_hw
*hw
= &adapter
->hw
;
1420 struct net_device
*netdev
= adapter
->netdev
;
1421 struct pci_dev
*pdev
= adapter
->pdev
;
1423 pci_read_config_word(pdev
, PCI_COMMAND
, &hw
->bus
.pci_cmd_word
);
1425 adapter
->tx_ring_count
= IGB_DEFAULT_TXD
;
1426 adapter
->rx_ring_count
= IGB_DEFAULT_RXD
;
1427 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
1428 adapter
->rx_ps_hdr_size
= 0; /* disable packet split */
1429 adapter
->max_frame_size
= netdev
->mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
1430 adapter
->min_frame_size
= ETH_ZLEN
+ ETH_FCS_LEN
;
1432 /* This call may decrease the number of queues depending on
1433 * interrupt mode. */
1434 igb_set_interrupt_capability(adapter
);
1436 if (igb_alloc_queues(adapter
)) {
1437 dev_err(&pdev
->dev
, "Unable to allocate memory for queues\n");
1441 /* Explicitly disable IRQ since the NIC can be in any state. */
1442 igb_irq_disable(adapter
);
1444 set_bit(__IGB_DOWN
, &adapter
->state
);
1449 * igb_open - Called when a network interface is made active
1450 * @netdev: network interface device structure
1452 * Returns 0 on success, negative value on failure
1454 * The open entry point is called when a network interface is made
1455 * active by the system (IFF_UP). At this point all resources needed
1456 * for transmit and receive operations are allocated, the interrupt
1457 * handler is registered with the OS, the watchdog timer is started,
1458 * and the stack is notified that the interface is ready.
1460 static int igb_open(struct net_device
*netdev
)
1462 struct igb_adapter
*adapter
= netdev_priv(netdev
);
1463 struct e1000_hw
*hw
= &adapter
->hw
;
1467 /* disallow open during test */
1468 if (test_bit(__IGB_TESTING
, &adapter
->state
))
1471 /* allocate transmit descriptors */
1472 err
= igb_setup_all_tx_resources(adapter
);
1476 /* allocate receive descriptors */
1477 err
= igb_setup_all_rx_resources(adapter
);
1481 /* e1000_power_up_phy(adapter); */
1483 adapter
->mng_vlan_id
= IGB_MNG_VLAN_NONE
;
1484 if ((adapter
->hw
.mng_cookie
.status
&
1485 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
))
1486 igb_update_mng_vlan(adapter
);
1488 /* before we allocate an interrupt, we must be ready to handle it.
1489 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1490 * as soon as we call pci_request_irq, so we have to setup our
1491 * clean_rx handler before we do so. */
1492 igb_configure(adapter
);
1494 err
= igb_request_irq(adapter
);
1498 /* From here on the code is the same as igb_up() */
1499 clear_bit(__IGB_DOWN
, &adapter
->state
);
1501 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
1502 napi_enable(&adapter
->rx_ring
[i
].napi
);
1504 /* Clear any pending interrupts. */
1507 igb_irq_enable(adapter
);
1509 netif_tx_start_all_queues(netdev
);
1511 /* Fire a link status change interrupt to start the watchdog. */
1512 wr32(E1000_ICS
, E1000_ICS_LSC
);
1517 igb_release_hw_control(adapter
);
1518 /* e1000_power_down_phy(adapter); */
1519 igb_free_all_rx_resources(adapter
);
1521 igb_free_all_tx_resources(adapter
);
1529 * igb_close - Disables a network interface
1530 * @netdev: network interface device structure
1532 * Returns 0, this is not allowed to fail
1534 * The close entry point is called when an interface is de-activated
1535 * by the OS. The hardware is still under the driver's control, but
1536 * needs to be disabled. A global MAC reset is issued to stop the
1537 * hardware, and all transmit and receive resources are freed.
1539 static int igb_close(struct net_device
*netdev
)
1541 struct igb_adapter
*adapter
= netdev_priv(netdev
);
1543 WARN_ON(test_bit(__IGB_RESETTING
, &adapter
->state
));
1546 igb_free_irq(adapter
);
1548 igb_free_all_tx_resources(adapter
);
1549 igb_free_all_rx_resources(adapter
);
1551 /* kill manageability vlan ID if supported, but not if a vlan with
1552 * the same ID is registered on the host OS (let 8021q kill it) */
1553 if ((adapter
->hw
.mng_cookie
.status
&
1554 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
1556 vlan_group_get_device(adapter
->vlgrp
, adapter
->mng_vlan_id
)))
1557 igb_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
1563 * igb_setup_tx_resources - allocate Tx resources (Descriptors)
1564 * @adapter: board private structure
1565 * @tx_ring: tx descriptor ring (for a specific queue) to setup
1567 * Return 0 on success, negative on failure
1570 int igb_setup_tx_resources(struct igb_adapter
*adapter
,
1571 struct igb_ring
*tx_ring
)
1573 struct pci_dev
*pdev
= adapter
->pdev
;
1576 size
= sizeof(struct igb_buffer
) * tx_ring
->count
;
1577 tx_ring
->buffer_info
= vmalloc(size
);
1578 if (!tx_ring
->buffer_info
)
1580 memset(tx_ring
->buffer_info
, 0, size
);
1582 /* round up to nearest 4K */
1583 tx_ring
->size
= tx_ring
->count
* sizeof(struct e1000_tx_desc
);
1584 tx_ring
->size
= ALIGN(tx_ring
->size
, 4096);
1586 tx_ring
->desc
= pci_alloc_consistent(pdev
, tx_ring
->size
,
1592 tx_ring
->adapter
= adapter
;
1593 tx_ring
->next_to_use
= 0;
1594 tx_ring
->next_to_clean
= 0;
1598 vfree(tx_ring
->buffer_info
);
1599 dev_err(&adapter
->pdev
->dev
,
1600 "Unable to allocate memory for the transmit descriptor ring\n");
1605 * igb_setup_all_tx_resources - wrapper to allocate Tx resources
1606 * (Descriptors) for all queues
1607 * @adapter: board private structure
1609 * Return 0 on success, negative on failure
1611 static int igb_setup_all_tx_resources(struct igb_adapter
*adapter
)
1616 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
1617 err
= igb_setup_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1619 dev_err(&adapter
->pdev
->dev
,
1620 "Allocation for Tx Queue %u failed\n", i
);
1621 for (i
--; i
>= 0; i
--)
1622 igb_free_tx_resources(&adapter
->tx_ring
[i
]);
1627 for (i
= 0; i
< IGB_MAX_TX_QUEUES
; i
++) {
1628 r_idx
= i
% adapter
->num_tx_queues
;
1629 adapter
->multi_tx_table
[i
] = &adapter
->tx_ring
[r_idx
];
1635 * igb_configure_tx - Configure transmit Unit after Reset
1636 * @adapter: board private structure
1638 * Configure the Tx unit of the MAC after a reset.
1640 static void igb_configure_tx(struct igb_adapter
*adapter
)
1643 struct e1000_hw
*hw
= &adapter
->hw
;
1648 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
1649 struct igb_ring
*ring
= &(adapter
->tx_ring
[i
]);
1651 wr32(E1000_TDLEN(j
),
1652 ring
->count
* sizeof(struct e1000_tx_desc
));
1654 wr32(E1000_TDBAL(j
),
1655 tdba
& 0x00000000ffffffffULL
);
1656 wr32(E1000_TDBAH(j
), tdba
>> 32);
1658 ring
->head
= E1000_TDH(j
);
1659 ring
->tail
= E1000_TDT(j
);
1660 writel(0, hw
->hw_addr
+ ring
->tail
);
1661 writel(0, hw
->hw_addr
+ ring
->head
);
1662 txdctl
= rd32(E1000_TXDCTL(j
));
1663 txdctl
|= E1000_TXDCTL_QUEUE_ENABLE
;
1664 wr32(E1000_TXDCTL(j
), txdctl
);
1666 /* Turn off Relaxed Ordering on head write-backs. The
1667 * writebacks MUST be delivered in order or it will
1668 * completely screw up our bookeeping.
1670 txctrl
= rd32(E1000_DCA_TXCTRL(j
));
1671 txctrl
&= ~E1000_DCA_TXCTRL_TX_WB_RO_EN
;
1672 wr32(E1000_DCA_TXCTRL(j
), txctrl
);
1677 /* Use the default values for the Tx Inter Packet Gap (IPG) timer */
1679 /* Program the Transmit Control Register */
1681 tctl
= rd32(E1000_TCTL
);
1682 tctl
&= ~E1000_TCTL_CT
;
1683 tctl
|= E1000_TCTL_PSP
| E1000_TCTL_RTLC
|
1684 (E1000_COLLISION_THRESHOLD
<< E1000_CT_SHIFT
);
1686 igb_config_collision_dist(hw
);
1688 /* Setup Transmit Descriptor Settings for eop descriptor */
1689 adapter
->txd_cmd
= E1000_TXD_CMD_EOP
| E1000_TXD_CMD_RS
;
1691 /* Enable transmits */
1692 tctl
|= E1000_TCTL_EN
;
1694 wr32(E1000_TCTL
, tctl
);
1698 * igb_setup_rx_resources - allocate Rx resources (Descriptors)
1699 * @adapter: board private structure
1700 * @rx_ring: rx descriptor ring (for a specific queue) to setup
1702 * Returns 0 on success, negative on failure
1705 int igb_setup_rx_resources(struct igb_adapter
*adapter
,
1706 struct igb_ring
*rx_ring
)
1708 struct pci_dev
*pdev
= adapter
->pdev
;
1711 size
= sizeof(struct igb_buffer
) * rx_ring
->count
;
1712 rx_ring
->buffer_info
= vmalloc(size
);
1713 if (!rx_ring
->buffer_info
)
1715 memset(rx_ring
->buffer_info
, 0, size
);
1717 desc_len
= sizeof(union e1000_adv_rx_desc
);
1719 /* Round up to nearest 4K */
1720 rx_ring
->size
= rx_ring
->count
* desc_len
;
1721 rx_ring
->size
= ALIGN(rx_ring
->size
, 4096);
1723 rx_ring
->desc
= pci_alloc_consistent(pdev
, rx_ring
->size
,
1729 rx_ring
->next_to_clean
= 0;
1730 rx_ring
->next_to_use
= 0;
1732 rx_ring
->adapter
= adapter
;
1737 vfree(rx_ring
->buffer_info
);
1738 dev_err(&adapter
->pdev
->dev
, "Unable to allocate memory for "
1739 "the receive descriptor ring\n");
1744 * igb_setup_all_rx_resources - wrapper to allocate Rx resources
1745 * (Descriptors) for all queues
1746 * @adapter: board private structure
1748 * Return 0 on success, negative on failure
1750 static int igb_setup_all_rx_resources(struct igb_adapter
*adapter
)
1754 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
1755 err
= igb_setup_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
1757 dev_err(&adapter
->pdev
->dev
,
1758 "Allocation for Rx Queue %u failed\n", i
);
1759 for (i
--; i
>= 0; i
--)
1760 igb_free_rx_resources(&adapter
->rx_ring
[i
]);
1769 * igb_setup_rctl - configure the receive control registers
1770 * @adapter: Board private structure
1772 static void igb_setup_rctl(struct igb_adapter
*adapter
)
1774 struct e1000_hw
*hw
= &adapter
->hw
;
1779 rctl
= rd32(E1000_RCTL
);
1781 rctl
&= ~(3 << E1000_RCTL_MO_SHIFT
);
1782 rctl
&= ~(E1000_RCTL_LBM_TCVR
| E1000_RCTL_LBM_MAC
);
1784 rctl
|= E1000_RCTL_EN
| E1000_RCTL_BAM
| E1000_RCTL_RDMTS_HALF
|
1785 (hw
->mac
.mc_filter_type
<< E1000_RCTL_MO_SHIFT
);
1788 * enable stripping of CRC. It's unlikely this will break BMC
1789 * redirection as it did with e1000. Newer features require
1790 * that the HW strips the CRC.
1792 rctl
|= E1000_RCTL_SECRC
;
1795 * disable store bad packets and clear size bits.
1797 rctl
&= ~(E1000_RCTL_SBP
| E1000_RCTL_SZ_256
);
1799 /* enable LPE when to prevent packets larger than max_frame_size */
1800 rctl
|= E1000_RCTL_LPE
;
1802 /* Setup buffer sizes */
1803 switch (adapter
->rx_buffer_len
) {
1804 case IGB_RXBUFFER_256
:
1805 rctl
|= E1000_RCTL_SZ_256
;
1807 case IGB_RXBUFFER_512
:
1808 rctl
|= E1000_RCTL_SZ_512
;
1811 srrctl
= ALIGN(adapter
->rx_buffer_len
, 1024)
1812 >> E1000_SRRCTL_BSIZEPKT_SHIFT
;
1816 /* 82575 and greater support packet-split where the protocol
1817 * header is placed in skb->data and the packet data is
1818 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1819 * In the case of a non-split, skb->data is linearly filled,
1820 * followed by the page buffers. Therefore, skb->data is
1821 * sized to hold the largest protocol header.
1823 /* allocations using alloc_page take too long for regular MTU
1824 * so only enable packet split for jumbo frames */
1825 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
1826 adapter
->rx_ps_hdr_size
= IGB_RXBUFFER_128
;
1827 srrctl
|= adapter
->rx_ps_hdr_size
<<
1828 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT
;
1829 srrctl
|= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS
;
1831 adapter
->rx_ps_hdr_size
= 0;
1832 srrctl
|= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF
;
1835 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
1836 j
= adapter
->rx_ring
[i
].reg_idx
;
1837 wr32(E1000_SRRCTL(j
), srrctl
);
1840 wr32(E1000_RCTL
, rctl
);
1844 * igb_configure_rx - Configure receive Unit after Reset
1845 * @adapter: board private structure
1847 * Configure the Rx unit of the MAC after a reset.
1849 static void igb_configure_rx(struct igb_adapter
*adapter
)
1852 struct e1000_hw
*hw
= &adapter
->hw
;
1857 /* disable receives while setting up the descriptors */
1858 rctl
= rd32(E1000_RCTL
);
1859 wr32(E1000_RCTL
, rctl
& ~E1000_RCTL_EN
);
1863 if (adapter
->itr_setting
> 3)
1864 wr32(E1000_ITR
, adapter
->itr
);
1866 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1867 * the Base and Length of the Rx Descriptor Ring */
1868 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
1869 struct igb_ring
*ring
= &(adapter
->rx_ring
[i
]);
1872 wr32(E1000_RDBAL(j
),
1873 rdba
& 0x00000000ffffffffULL
);
1874 wr32(E1000_RDBAH(j
), rdba
>> 32);
1875 wr32(E1000_RDLEN(j
),
1876 ring
->count
* sizeof(union e1000_adv_rx_desc
));
1878 ring
->head
= E1000_RDH(j
);
1879 ring
->tail
= E1000_RDT(j
);
1880 writel(0, hw
->hw_addr
+ ring
->tail
);
1881 writel(0, hw
->hw_addr
+ ring
->head
);
1883 rxdctl
= rd32(E1000_RXDCTL(j
));
1884 rxdctl
|= E1000_RXDCTL_QUEUE_ENABLE
;
1885 rxdctl
&= 0xFFF00000;
1886 rxdctl
|= IGB_RX_PTHRESH
;
1887 rxdctl
|= IGB_RX_HTHRESH
<< 8;
1888 rxdctl
|= IGB_RX_WTHRESH
<< 16;
1889 wr32(E1000_RXDCTL(j
), rxdctl
);
1892 if (adapter
->num_rx_queues
> 1) {
1901 get_random_bytes(&random
[0], 40);
1903 if (hw
->mac
.type
>= e1000_82576
)
1907 for (j
= 0; j
< (32 * 4); j
++) {
1909 adapter
->rx_ring
[(j
% adapter
->num_rx_queues
)].reg_idx
<< shift
;
1912 hw
->hw_addr
+ E1000_RETA(0) + (j
& ~3));
1914 mrqc
= E1000_MRQC_ENABLE_RSS_4Q
;
1916 /* Fill out hash function seeds */
1917 for (j
= 0; j
< 10; j
++)
1918 array_wr32(E1000_RSSRK(0), j
, random
[j
]);
1920 mrqc
|= (E1000_MRQC_RSS_FIELD_IPV4
|
1921 E1000_MRQC_RSS_FIELD_IPV4_TCP
);
1922 mrqc
|= (E1000_MRQC_RSS_FIELD_IPV6
|
1923 E1000_MRQC_RSS_FIELD_IPV6_TCP
);
1924 mrqc
|= (E1000_MRQC_RSS_FIELD_IPV4_UDP
|
1925 E1000_MRQC_RSS_FIELD_IPV6_UDP
);
1926 mrqc
|= (E1000_MRQC_RSS_FIELD_IPV6_UDP_EX
|
1927 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX
);
1930 wr32(E1000_MRQC
, mrqc
);
1932 /* Multiqueue and raw packet checksumming are mutually
1933 * exclusive. Note that this not the same as TCP/IP
1934 * checksumming, which works fine. */
1935 rxcsum
= rd32(E1000_RXCSUM
);
1936 rxcsum
|= E1000_RXCSUM_PCSD
;
1937 wr32(E1000_RXCSUM
, rxcsum
);
1939 /* Enable Receive Checksum Offload for TCP and UDP */
1940 rxcsum
= rd32(E1000_RXCSUM
);
1941 if (adapter
->rx_csum
) {
1942 rxcsum
|= E1000_RXCSUM_TUOFL
;
1944 /* Enable IPv4 payload checksum for UDP fragments
1945 * Must be used in conjunction with packet-split. */
1946 if (adapter
->rx_ps_hdr_size
)
1947 rxcsum
|= E1000_RXCSUM_IPPCSE
;
1949 rxcsum
&= ~E1000_RXCSUM_TUOFL
;
1950 /* don't need to clear IPPCSE as it defaults to 0 */
1952 wr32(E1000_RXCSUM
, rxcsum
);
1957 adapter
->max_frame_size
+ VLAN_TAG_SIZE
);
1959 wr32(E1000_RLPML
, adapter
->max_frame_size
);
1961 /* Enable Receives */
1962 wr32(E1000_RCTL
, rctl
);
1966 * igb_free_tx_resources - Free Tx Resources per Queue
1967 * @tx_ring: Tx descriptor ring for a specific queue
1969 * Free all transmit software resources
1971 void igb_free_tx_resources(struct igb_ring
*tx_ring
)
1973 struct pci_dev
*pdev
= tx_ring
->adapter
->pdev
;
1975 igb_clean_tx_ring(tx_ring
);
1977 vfree(tx_ring
->buffer_info
);
1978 tx_ring
->buffer_info
= NULL
;
1980 pci_free_consistent(pdev
, tx_ring
->size
, tx_ring
->desc
, tx_ring
->dma
);
1982 tx_ring
->desc
= NULL
;
1986 * igb_free_all_tx_resources - Free Tx Resources for All Queues
1987 * @adapter: board private structure
1989 * Free all transmit software resources
1991 static void igb_free_all_tx_resources(struct igb_adapter
*adapter
)
1995 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
1996 igb_free_tx_resources(&adapter
->tx_ring
[i
]);
1999 static void igb_unmap_and_free_tx_resource(struct igb_adapter
*adapter
,
2000 struct igb_buffer
*buffer_info
)
2002 if (buffer_info
->dma
) {
2003 pci_unmap_page(adapter
->pdev
,
2005 buffer_info
->length
,
2007 buffer_info
->dma
= 0;
2009 if (buffer_info
->skb
) {
2010 dev_kfree_skb_any(buffer_info
->skb
);
2011 buffer_info
->skb
= NULL
;
2013 buffer_info
->time_stamp
= 0;
2014 /* buffer_info must be completely set up in the transmit path */
2018 * igb_clean_tx_ring - Free Tx Buffers
2019 * @tx_ring: ring to be cleaned
2021 static void igb_clean_tx_ring(struct igb_ring
*tx_ring
)
2023 struct igb_adapter
*adapter
= tx_ring
->adapter
;
2024 struct igb_buffer
*buffer_info
;
2028 if (!tx_ring
->buffer_info
)
2030 /* Free all the Tx ring sk_buffs */
2032 for (i
= 0; i
< tx_ring
->count
; i
++) {
2033 buffer_info
= &tx_ring
->buffer_info
[i
];
2034 igb_unmap_and_free_tx_resource(adapter
, buffer_info
);
2037 size
= sizeof(struct igb_buffer
) * tx_ring
->count
;
2038 memset(tx_ring
->buffer_info
, 0, size
);
2040 /* Zero out the descriptor ring */
2042 memset(tx_ring
->desc
, 0, tx_ring
->size
);
2044 tx_ring
->next_to_use
= 0;
2045 tx_ring
->next_to_clean
= 0;
2047 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->head
);
2048 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
2052 * igb_clean_all_tx_rings - Free Tx Buffers for all queues
2053 * @adapter: board private structure
2055 static void igb_clean_all_tx_rings(struct igb_adapter
*adapter
)
2059 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2060 igb_clean_tx_ring(&adapter
->tx_ring
[i
]);
2064 * igb_free_rx_resources - Free Rx Resources
2065 * @rx_ring: ring to clean the resources from
2067 * Free all receive software resources
2069 void igb_free_rx_resources(struct igb_ring
*rx_ring
)
2071 struct pci_dev
*pdev
= rx_ring
->adapter
->pdev
;
2073 igb_clean_rx_ring(rx_ring
);
2075 vfree(rx_ring
->buffer_info
);
2076 rx_ring
->buffer_info
= NULL
;
2078 pci_free_consistent(pdev
, rx_ring
->size
, rx_ring
->desc
, rx_ring
->dma
);
2080 rx_ring
->desc
= NULL
;
2084 * igb_free_all_rx_resources - Free Rx Resources for All Queues
2085 * @adapter: board private structure
2087 * Free all receive software resources
2089 static void igb_free_all_rx_resources(struct igb_adapter
*adapter
)
2093 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2094 igb_free_rx_resources(&adapter
->rx_ring
[i
]);
2098 * igb_clean_rx_ring - Free Rx Buffers per Queue
2099 * @rx_ring: ring to free buffers from
2101 static void igb_clean_rx_ring(struct igb_ring
*rx_ring
)
2103 struct igb_adapter
*adapter
= rx_ring
->adapter
;
2104 struct igb_buffer
*buffer_info
;
2105 struct pci_dev
*pdev
= adapter
->pdev
;
2109 if (!rx_ring
->buffer_info
)
2111 /* Free all the Rx ring sk_buffs */
2112 for (i
= 0; i
< rx_ring
->count
; i
++) {
2113 buffer_info
= &rx_ring
->buffer_info
[i
];
2114 if (buffer_info
->dma
) {
2115 if (adapter
->rx_ps_hdr_size
)
2116 pci_unmap_single(pdev
, buffer_info
->dma
,
2117 adapter
->rx_ps_hdr_size
,
2118 PCI_DMA_FROMDEVICE
);
2120 pci_unmap_single(pdev
, buffer_info
->dma
,
2121 adapter
->rx_buffer_len
,
2122 PCI_DMA_FROMDEVICE
);
2123 buffer_info
->dma
= 0;
2126 if (buffer_info
->skb
) {
2127 dev_kfree_skb(buffer_info
->skb
);
2128 buffer_info
->skb
= NULL
;
2130 if (buffer_info
->page
) {
2131 if (buffer_info
->page_dma
)
2132 pci_unmap_page(pdev
, buffer_info
->page_dma
,
2134 PCI_DMA_FROMDEVICE
);
2135 put_page(buffer_info
->page
);
2136 buffer_info
->page
= NULL
;
2137 buffer_info
->page_dma
= 0;
2138 buffer_info
->page_offset
= 0;
2142 size
= sizeof(struct igb_buffer
) * rx_ring
->count
;
2143 memset(rx_ring
->buffer_info
, 0, size
);
2145 /* Zero out the descriptor ring */
2146 memset(rx_ring
->desc
, 0, rx_ring
->size
);
2148 rx_ring
->next_to_clean
= 0;
2149 rx_ring
->next_to_use
= 0;
2151 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->head
);
2152 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
2156 * igb_clean_all_rx_rings - Free Rx Buffers for all queues
2157 * @adapter: board private structure
2159 static void igb_clean_all_rx_rings(struct igb_adapter
*adapter
)
2163 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2164 igb_clean_rx_ring(&adapter
->rx_ring
[i
]);
2168 * igb_set_mac - Change the Ethernet Address of the NIC
2169 * @netdev: network interface device structure
2170 * @p: pointer to an address structure
2172 * Returns 0 on success, negative on failure
2174 static int igb_set_mac(struct net_device
*netdev
, void *p
)
2176 struct igb_adapter
*adapter
= netdev_priv(netdev
);
2177 struct e1000_hw
*hw
= &adapter
->hw
;
2178 struct sockaddr
*addr
= p
;
2180 if (!is_valid_ether_addr(addr
->sa_data
))
2181 return -EADDRNOTAVAIL
;
2183 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
2184 memcpy(hw
->mac
.addr
, addr
->sa_data
, netdev
->addr_len
);
2186 hw
->mac
.ops
.rar_set(hw
, hw
->mac
.addr
, 0);
2192 * igb_set_multi - Multicast and Promiscuous mode set
2193 * @netdev: network interface device structure
2195 * The set_multi entry point is called whenever the multicast address
2196 * list or the network interface flags are updated. This routine is
2197 * responsible for configuring the hardware for proper multicast,
2198 * promiscuous mode, and all-multi behavior.
2200 static void igb_set_multi(struct net_device
*netdev
)
2202 struct igb_adapter
*adapter
= netdev_priv(netdev
);
2203 struct e1000_hw
*hw
= &adapter
->hw
;
2204 struct e1000_mac_info
*mac
= &hw
->mac
;
2205 struct dev_mc_list
*mc_ptr
;
2210 /* Check for Promiscuous and All Multicast modes */
2212 rctl
= rd32(E1000_RCTL
);
2214 if (netdev
->flags
& IFF_PROMISC
) {
2215 rctl
|= (E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2216 rctl
&= ~E1000_RCTL_VFE
;
2218 if (netdev
->flags
& IFF_ALLMULTI
) {
2219 rctl
|= E1000_RCTL_MPE
;
2220 rctl
&= ~E1000_RCTL_UPE
;
2222 rctl
&= ~(E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2223 rctl
|= E1000_RCTL_VFE
;
2225 wr32(E1000_RCTL
, rctl
);
2227 if (!netdev
->mc_count
) {
2228 /* nothing to program, so clear mc list */
2229 igb_update_mc_addr_list(hw
, NULL
, 0, 1,
2230 mac
->rar_entry_count
);
2234 mta_list
= kzalloc(netdev
->mc_count
* 6, GFP_ATOMIC
);
2238 /* The shared function expects a packed array of only addresses. */
2239 mc_ptr
= netdev
->mc_list
;
2241 for (i
= 0; i
< netdev
->mc_count
; i
++) {
2244 memcpy(mta_list
+ (i
*ETH_ALEN
), mc_ptr
->dmi_addr
, ETH_ALEN
);
2245 mc_ptr
= mc_ptr
->next
;
2247 igb_update_mc_addr_list(hw
, mta_list
, i
, 1, mac
->rar_entry_count
);
2251 /* Need to wait a few seconds after link up to get diagnostic information from
2253 static void igb_update_phy_info(unsigned long data
)
2255 struct igb_adapter
*adapter
= (struct igb_adapter
*) data
;
2256 igb_get_phy_info(&adapter
->hw
);
2260 * igb_has_link - check shared code for link and determine up/down
2261 * @adapter: pointer to driver private info
2263 static bool igb_has_link(struct igb_adapter
*adapter
)
2265 struct e1000_hw
*hw
= &adapter
->hw
;
2266 bool link_active
= false;
2269 /* get_link_status is set on LSC (link status) interrupt or
2270 * rx sequence error interrupt. get_link_status will stay
2271 * false until the e1000_check_for_link establishes link
2272 * for copper adapters ONLY
2274 switch (hw
->phy
.media_type
) {
2275 case e1000_media_type_copper
:
2276 if (hw
->mac
.get_link_status
) {
2277 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
2278 link_active
= !hw
->mac
.get_link_status
;
2283 case e1000_media_type_fiber
:
2284 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
2285 link_active
= !!(rd32(E1000_STATUS
) & E1000_STATUS_LU
);
2287 case e1000_media_type_internal_serdes
:
2288 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
2289 link_active
= hw
->mac
.serdes_has_link
;
2292 case e1000_media_type_unknown
:
2300 * igb_watchdog - Timer Call-back
2301 * @data: pointer to adapter cast into an unsigned long
2303 static void igb_watchdog(unsigned long data
)
2305 struct igb_adapter
*adapter
= (struct igb_adapter
*)data
;
2306 /* Do the rest outside of interrupt context */
2307 schedule_work(&adapter
->watchdog_task
);
2310 static void igb_watchdog_task(struct work_struct
*work
)
2312 struct igb_adapter
*adapter
= container_of(work
,
2313 struct igb_adapter
, watchdog_task
);
2314 struct e1000_hw
*hw
= &adapter
->hw
;
2315 struct net_device
*netdev
= adapter
->netdev
;
2316 struct igb_ring
*tx_ring
= adapter
->tx_ring
;
2321 link
= igb_has_link(adapter
);
2322 if ((netif_carrier_ok(netdev
)) && link
)
2326 if (!netif_carrier_ok(netdev
)) {
2328 hw
->mac
.ops
.get_speed_and_duplex(&adapter
->hw
,
2329 &adapter
->link_speed
,
2330 &adapter
->link_duplex
);
2332 ctrl
= rd32(E1000_CTRL
);
2333 /* Links status message must follow this format */
2334 printk(KERN_INFO
"igb: %s NIC Link is Up %d Mbps %s, "
2335 "Flow Control: %s\n",
2337 adapter
->link_speed
,
2338 adapter
->link_duplex
== FULL_DUPLEX
?
2339 "Full Duplex" : "Half Duplex",
2340 ((ctrl
& E1000_CTRL_TFCE
) && (ctrl
&
2341 E1000_CTRL_RFCE
)) ? "RX/TX" : ((ctrl
&
2342 E1000_CTRL_RFCE
) ? "RX" : ((ctrl
&
2343 E1000_CTRL_TFCE
) ? "TX" : "None")));
2345 /* tweak tx_queue_len according to speed/duplex and
2346 * adjust the timeout factor */
2347 netdev
->tx_queue_len
= adapter
->tx_queue_len
;
2348 adapter
->tx_timeout_factor
= 1;
2349 switch (adapter
->link_speed
) {
2351 netdev
->tx_queue_len
= 10;
2352 adapter
->tx_timeout_factor
= 14;
2355 netdev
->tx_queue_len
= 100;
2356 /* maybe add some timeout factor ? */
2360 netif_carrier_on(netdev
);
2361 netif_tx_wake_all_queues(netdev
);
2363 /* link state has changed, schedule phy info update */
2364 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
2365 mod_timer(&adapter
->phy_info_timer
,
2366 round_jiffies(jiffies
+ 2 * HZ
));
2369 if (netif_carrier_ok(netdev
)) {
2370 adapter
->link_speed
= 0;
2371 adapter
->link_duplex
= 0;
2372 /* Links status message must follow this format */
2373 printk(KERN_INFO
"igb: %s NIC Link is Down\n",
2375 netif_carrier_off(netdev
);
2376 netif_tx_stop_all_queues(netdev
);
2378 /* link state has changed, schedule phy info update */
2379 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
2380 mod_timer(&adapter
->phy_info_timer
,
2381 round_jiffies(jiffies
+ 2 * HZ
));
2386 igb_update_stats(adapter
);
2388 hw
->mac
.tx_packet_delta
= adapter
->stats
.tpt
- adapter
->tpt_old
;
2389 adapter
->tpt_old
= adapter
->stats
.tpt
;
2390 hw
->mac
.collision_delta
= adapter
->stats
.colc
- adapter
->colc_old
;
2391 adapter
->colc_old
= adapter
->stats
.colc
;
2393 adapter
->gorc
= adapter
->stats
.gorc
- adapter
->gorc_old
;
2394 adapter
->gorc_old
= adapter
->stats
.gorc
;
2395 adapter
->gotc
= adapter
->stats
.gotc
- adapter
->gotc_old
;
2396 adapter
->gotc_old
= adapter
->stats
.gotc
;
2398 igb_update_adaptive(&adapter
->hw
);
2400 if (!netif_carrier_ok(netdev
)) {
2401 if (IGB_DESC_UNUSED(tx_ring
) + 1 < tx_ring
->count
) {
2402 /* We've lost link, so the controller stops DMA,
2403 * but we've got queued Tx work that's never going
2404 * to get done, so reset controller to flush Tx.
2405 * (Do the reset outside of interrupt context). */
2406 adapter
->tx_timeout_count
++;
2407 schedule_work(&adapter
->reset_task
);
2411 /* Cause software interrupt to ensure rx ring is cleaned */
2412 if (adapter
->msix_entries
) {
2413 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2414 eics
|= adapter
->rx_ring
[i
].eims_value
;
2415 wr32(E1000_EICS
, eics
);
2417 wr32(E1000_ICS
, E1000_ICS_RXDMT0
);
2420 /* Force detection of hung controller every watchdog period */
2421 tx_ring
->detect_tx_hung
= true;
2423 /* Reset the timer */
2424 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
2425 mod_timer(&adapter
->watchdog_timer
,
2426 round_jiffies(jiffies
+ 2 * HZ
));
2429 enum latency_range
{
2433 latency_invalid
= 255
2438 * igb_update_ring_itr - update the dynamic ITR value based on packet size
2440 * Stores a new ITR value based on strictly on packet size. This
2441 * algorithm is less sophisticated than that used in igb_update_itr,
2442 * due to the difficulty of synchronizing statistics across multiple
2443 * receive rings. The divisors and thresholds used by this fuction
2444 * were determined based on theoretical maximum wire speed and testing
2445 * data, in order to minimize response time while increasing bulk
2447 * This functionality is controlled by the InterruptThrottleRate module
2448 * parameter (see igb_param.c)
2449 * NOTE: This function is called only when operating in a multiqueue
2450 * receive environment.
2451 * @rx_ring: pointer to ring
2453 static void igb_update_ring_itr(struct igb_ring
*rx_ring
)
2455 int new_val
= rx_ring
->itr_val
;
2456 int avg_wire_size
= 0;
2457 struct igb_adapter
*adapter
= rx_ring
->adapter
;
2459 if (!rx_ring
->total_packets
)
2460 goto clear_counts
; /* no packets, so don't do anything */
2462 /* For non-gigabit speeds, just fix the interrupt rate at 4000
2463 * ints/sec - ITR timer value of 120 ticks.
2465 if (adapter
->link_speed
!= SPEED_1000
) {
2469 avg_wire_size
= rx_ring
->total_bytes
/ rx_ring
->total_packets
;
2471 /* Add 24 bytes to size to account for CRC, preamble, and gap */
2472 avg_wire_size
+= 24;
2474 /* Don't starve jumbo frames */
2475 avg_wire_size
= min(avg_wire_size
, 3000);
2477 /* Give a little boost to mid-size frames */
2478 if ((avg_wire_size
> 300) && (avg_wire_size
< 1200))
2479 new_val
= avg_wire_size
/ 3;
2481 new_val
= avg_wire_size
/ 2;
2484 if (new_val
!= rx_ring
->itr_val
) {
2485 rx_ring
->itr_val
= new_val
;
2486 rx_ring
->set_itr
= 1;
2489 rx_ring
->total_bytes
= 0;
2490 rx_ring
->total_packets
= 0;
2494 * igb_update_itr - update the dynamic ITR value based on statistics
2495 * Stores a new ITR value based on packets and byte
2496 * counts during the last interrupt. The advantage of per interrupt
2497 * computation is faster updates and more accurate ITR for the current
2498 * traffic pattern. Constants in this function were computed
2499 * based on theoretical maximum wire speed and thresholds were set based
2500 * on testing data as well as attempting to minimize response time
2501 * while increasing bulk throughput.
2502 * this functionality is controlled by the InterruptThrottleRate module
2503 * parameter (see igb_param.c)
2504 * NOTE: These calculations are only valid when operating in a single-
2505 * queue environment.
2506 * @adapter: pointer to adapter
2507 * @itr_setting: current adapter->itr
2508 * @packets: the number of packets during this measurement interval
2509 * @bytes: the number of bytes during this measurement interval
2511 static unsigned int igb_update_itr(struct igb_adapter
*adapter
, u16 itr_setting
,
2512 int packets
, int bytes
)
2514 unsigned int retval
= itr_setting
;
2517 goto update_itr_done
;
2519 switch (itr_setting
) {
2520 case lowest_latency
:
2521 /* handle TSO and jumbo frames */
2522 if (bytes
/packets
> 8000)
2523 retval
= bulk_latency
;
2524 else if ((packets
< 5) && (bytes
> 512))
2525 retval
= low_latency
;
2527 case low_latency
: /* 50 usec aka 20000 ints/s */
2528 if (bytes
> 10000) {
2529 /* this if handles the TSO accounting */
2530 if (bytes
/packets
> 8000) {
2531 retval
= bulk_latency
;
2532 } else if ((packets
< 10) || ((bytes
/packets
) > 1200)) {
2533 retval
= bulk_latency
;
2534 } else if ((packets
> 35)) {
2535 retval
= lowest_latency
;
2537 } else if (bytes
/packets
> 2000) {
2538 retval
= bulk_latency
;
2539 } else if (packets
<= 2 && bytes
< 512) {
2540 retval
= lowest_latency
;
2543 case bulk_latency
: /* 250 usec aka 4000 ints/s */
2544 if (bytes
> 25000) {
2546 retval
= low_latency
;
2547 } else if (bytes
< 6000) {
2548 retval
= low_latency
;
2557 static void igb_set_itr(struct igb_adapter
*adapter
)
2560 u32 new_itr
= adapter
->itr
;
2562 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2563 if (adapter
->link_speed
!= SPEED_1000
) {
2569 adapter
->rx_itr
= igb_update_itr(adapter
,
2571 adapter
->rx_ring
->total_packets
,
2572 adapter
->rx_ring
->total_bytes
);
2574 if (adapter
->rx_ring
->buddy
) {
2575 adapter
->tx_itr
= igb_update_itr(adapter
,
2577 adapter
->tx_ring
->total_packets
,
2578 adapter
->tx_ring
->total_bytes
);
2580 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
2582 current_itr
= adapter
->rx_itr
;
2585 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2586 if (adapter
->itr_setting
== 3 &&
2587 current_itr
== lowest_latency
)
2588 current_itr
= low_latency
;
2590 switch (current_itr
) {
2591 /* counts and packets in update_itr are dependent on these numbers */
2592 case lowest_latency
:
2596 new_itr
= 20000; /* aka hwitr = ~200 */
2606 adapter
->rx_ring
->total_bytes
= 0;
2607 adapter
->rx_ring
->total_packets
= 0;
2608 if (adapter
->rx_ring
->buddy
) {
2609 adapter
->rx_ring
->buddy
->total_bytes
= 0;
2610 adapter
->rx_ring
->buddy
->total_packets
= 0;
2613 if (new_itr
!= adapter
->itr
) {
2614 /* this attempts to bias the interrupt rate towards Bulk
2615 * by adding intermediate steps when interrupt rate is
2617 new_itr
= new_itr
> adapter
->itr
?
2618 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
2620 /* Don't write the value here; it resets the adapter's
2621 * internal timer, and causes us to delay far longer than
2622 * we should between interrupts. Instead, we write the ITR
2623 * value at the beginning of the next interrupt so the timing
2624 * ends up being correct.
2626 adapter
->itr
= new_itr
;
2627 adapter
->rx_ring
->itr_val
= 1000000000 / (new_itr
* 256);
2628 adapter
->rx_ring
->set_itr
= 1;
2635 #define IGB_TX_FLAGS_CSUM 0x00000001
2636 #define IGB_TX_FLAGS_VLAN 0x00000002
2637 #define IGB_TX_FLAGS_TSO 0x00000004
2638 #define IGB_TX_FLAGS_IPV4 0x00000008
2639 #define IGB_TX_FLAGS_VLAN_MASK 0xffff0000
2640 #define IGB_TX_FLAGS_VLAN_SHIFT 16
2642 static inline int igb_tso_adv(struct igb_adapter
*adapter
,
2643 struct igb_ring
*tx_ring
,
2644 struct sk_buff
*skb
, u32 tx_flags
, u8
*hdr_len
)
2646 struct e1000_adv_tx_context_desc
*context_desc
;
2649 struct igb_buffer
*buffer_info
;
2650 u32 info
= 0, tu_cmd
= 0;
2651 u32 mss_l4len_idx
, l4len
;
2654 if (skb_header_cloned(skb
)) {
2655 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
2660 l4len
= tcp_hdrlen(skb
);
2663 if (skb
->protocol
== htons(ETH_P_IP
)) {
2664 struct iphdr
*iph
= ip_hdr(skb
);
2667 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
2671 } else if (skb_shinfo(skb
)->gso_type
== SKB_GSO_TCPV6
) {
2672 ipv6_hdr(skb
)->payload_len
= 0;
2673 tcp_hdr(skb
)->check
= ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
2674 &ipv6_hdr(skb
)->daddr
,
2678 i
= tx_ring
->next_to_use
;
2680 buffer_info
= &tx_ring
->buffer_info
[i
];
2681 context_desc
= E1000_TX_CTXTDESC_ADV(*tx_ring
, i
);
2682 /* VLAN MACLEN IPLEN */
2683 if (tx_flags
& IGB_TX_FLAGS_VLAN
)
2684 info
|= (tx_flags
& IGB_TX_FLAGS_VLAN_MASK
);
2685 info
|= (skb_network_offset(skb
) << E1000_ADVTXD_MACLEN_SHIFT
);
2686 *hdr_len
+= skb_network_offset(skb
);
2687 info
|= skb_network_header_len(skb
);
2688 *hdr_len
+= skb_network_header_len(skb
);
2689 context_desc
->vlan_macip_lens
= cpu_to_le32(info
);
2691 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2692 tu_cmd
|= (E1000_TXD_CMD_DEXT
| E1000_ADVTXD_DTYP_CTXT
);
2694 if (skb
->protocol
== htons(ETH_P_IP
))
2695 tu_cmd
|= E1000_ADVTXD_TUCMD_IPV4
;
2696 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
2698 context_desc
->type_tucmd_mlhl
= cpu_to_le32(tu_cmd
);
2701 mss_l4len_idx
= (skb_shinfo(skb
)->gso_size
<< E1000_ADVTXD_MSS_SHIFT
);
2702 mss_l4len_idx
|= (l4len
<< E1000_ADVTXD_L4LEN_SHIFT
);
2704 /* Context index must be unique per ring. */
2705 if (adapter
->flags
& IGB_FLAG_NEED_CTX_IDX
)
2706 mss_l4len_idx
|= tx_ring
->queue_index
<< 4;
2708 context_desc
->mss_l4len_idx
= cpu_to_le32(mss_l4len_idx
);
2709 context_desc
->seqnum_seed
= 0;
2711 buffer_info
->time_stamp
= jiffies
;
2712 buffer_info
->next_to_watch
= i
;
2713 buffer_info
->dma
= 0;
2715 if (i
== tx_ring
->count
)
2718 tx_ring
->next_to_use
= i
;
2723 static inline bool igb_tx_csum_adv(struct igb_adapter
*adapter
,
2724 struct igb_ring
*tx_ring
,
2725 struct sk_buff
*skb
, u32 tx_flags
)
2727 struct e1000_adv_tx_context_desc
*context_desc
;
2729 struct igb_buffer
*buffer_info
;
2730 u32 info
= 0, tu_cmd
= 0;
2732 if ((skb
->ip_summed
== CHECKSUM_PARTIAL
) ||
2733 (tx_flags
& IGB_TX_FLAGS_VLAN
)) {
2734 i
= tx_ring
->next_to_use
;
2735 buffer_info
= &tx_ring
->buffer_info
[i
];
2736 context_desc
= E1000_TX_CTXTDESC_ADV(*tx_ring
, i
);
2738 if (tx_flags
& IGB_TX_FLAGS_VLAN
)
2739 info
|= (tx_flags
& IGB_TX_FLAGS_VLAN_MASK
);
2740 info
|= (skb_network_offset(skb
) << E1000_ADVTXD_MACLEN_SHIFT
);
2741 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
2742 info
|= skb_network_header_len(skb
);
2744 context_desc
->vlan_macip_lens
= cpu_to_le32(info
);
2746 tu_cmd
|= (E1000_TXD_CMD_DEXT
| E1000_ADVTXD_DTYP_CTXT
);
2748 if (skb
->ip_summed
== CHECKSUM_PARTIAL
) {
2749 switch (skb
->protocol
) {
2750 case cpu_to_be16(ETH_P_IP
):
2751 tu_cmd
|= E1000_ADVTXD_TUCMD_IPV4
;
2752 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
2753 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
2755 case cpu_to_be16(ETH_P_IPV6
):
2756 /* XXX what about other V6 headers?? */
2757 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
2758 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
2761 if (unlikely(net_ratelimit()))
2762 dev_warn(&adapter
->pdev
->dev
,
2763 "partial checksum but proto=%x!\n",
2769 context_desc
->type_tucmd_mlhl
= cpu_to_le32(tu_cmd
);
2770 context_desc
->seqnum_seed
= 0;
2771 if (adapter
->flags
& IGB_FLAG_NEED_CTX_IDX
)
2772 context_desc
->mss_l4len_idx
=
2773 cpu_to_le32(tx_ring
->queue_index
<< 4);
2775 buffer_info
->time_stamp
= jiffies
;
2776 buffer_info
->next_to_watch
= i
;
2777 buffer_info
->dma
= 0;
2780 if (i
== tx_ring
->count
)
2782 tx_ring
->next_to_use
= i
;
2791 #define IGB_MAX_TXD_PWR 16
2792 #define IGB_MAX_DATA_PER_TXD (1<<IGB_MAX_TXD_PWR)
2794 static inline int igb_tx_map_adv(struct igb_adapter
*adapter
,
2795 struct igb_ring
*tx_ring
, struct sk_buff
*skb
,
2798 struct igb_buffer
*buffer_info
;
2799 unsigned int len
= skb_headlen(skb
);
2800 unsigned int count
= 0, i
;
2803 i
= tx_ring
->next_to_use
;
2805 buffer_info
= &tx_ring
->buffer_info
[i
];
2806 BUG_ON(len
>= IGB_MAX_DATA_PER_TXD
);
2807 buffer_info
->length
= len
;
2808 /* set time_stamp *before* dma to help avoid a possible race */
2809 buffer_info
->time_stamp
= jiffies
;
2810 buffer_info
->next_to_watch
= i
;
2811 buffer_info
->dma
= pci_map_single(adapter
->pdev
, skb
->data
, len
,
2815 if (i
== tx_ring
->count
)
2818 for (f
= 0; f
< skb_shinfo(skb
)->nr_frags
; f
++) {
2819 struct skb_frag_struct
*frag
;
2821 frag
= &skb_shinfo(skb
)->frags
[f
];
2824 buffer_info
= &tx_ring
->buffer_info
[i
];
2825 BUG_ON(len
>= IGB_MAX_DATA_PER_TXD
);
2826 buffer_info
->length
= len
;
2827 buffer_info
->time_stamp
= jiffies
;
2828 buffer_info
->next_to_watch
= i
;
2829 buffer_info
->dma
= pci_map_page(adapter
->pdev
,
2837 if (i
== tx_ring
->count
)
2841 i
= ((i
== 0) ? tx_ring
->count
- 1 : i
- 1);
2842 tx_ring
->buffer_info
[i
].skb
= skb
;
2843 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
2848 static inline void igb_tx_queue_adv(struct igb_adapter
*adapter
,
2849 struct igb_ring
*tx_ring
,
2850 int tx_flags
, int count
, u32 paylen
,
2853 union e1000_adv_tx_desc
*tx_desc
= NULL
;
2854 struct igb_buffer
*buffer_info
;
2855 u32 olinfo_status
= 0, cmd_type_len
;
2858 cmd_type_len
= (E1000_ADVTXD_DTYP_DATA
| E1000_ADVTXD_DCMD_IFCS
|
2859 E1000_ADVTXD_DCMD_DEXT
);
2861 if (tx_flags
& IGB_TX_FLAGS_VLAN
)
2862 cmd_type_len
|= E1000_ADVTXD_DCMD_VLE
;
2864 if (tx_flags
& IGB_TX_FLAGS_TSO
) {
2865 cmd_type_len
|= E1000_ADVTXD_DCMD_TSE
;
2867 /* insert tcp checksum */
2868 olinfo_status
|= E1000_TXD_POPTS_TXSM
<< 8;
2870 /* insert ip checksum */
2871 if (tx_flags
& IGB_TX_FLAGS_IPV4
)
2872 olinfo_status
|= E1000_TXD_POPTS_IXSM
<< 8;
2874 } else if (tx_flags
& IGB_TX_FLAGS_CSUM
) {
2875 olinfo_status
|= E1000_TXD_POPTS_TXSM
<< 8;
2878 if ((adapter
->flags
& IGB_FLAG_NEED_CTX_IDX
) &&
2879 (tx_flags
& (IGB_TX_FLAGS_CSUM
| IGB_TX_FLAGS_TSO
|
2880 IGB_TX_FLAGS_VLAN
)))
2881 olinfo_status
|= tx_ring
->queue_index
<< 4;
2883 olinfo_status
|= ((paylen
- hdr_len
) << E1000_ADVTXD_PAYLEN_SHIFT
);
2885 i
= tx_ring
->next_to_use
;
2887 buffer_info
= &tx_ring
->buffer_info
[i
];
2888 tx_desc
= E1000_TX_DESC_ADV(*tx_ring
, i
);
2889 tx_desc
->read
.buffer_addr
= cpu_to_le64(buffer_info
->dma
);
2890 tx_desc
->read
.cmd_type_len
=
2891 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
2892 tx_desc
->read
.olinfo_status
= cpu_to_le32(olinfo_status
);
2894 if (i
== tx_ring
->count
)
2898 tx_desc
->read
.cmd_type_len
|= cpu_to_le32(adapter
->txd_cmd
);
2899 /* Force memory writes to complete before letting h/w
2900 * know there are new descriptors to fetch. (Only
2901 * applicable for weak-ordered memory model archs,
2902 * such as IA-64). */
2905 tx_ring
->next_to_use
= i
;
2906 writel(i
, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
2907 /* we need this if more than one processor can write to our tail
2908 * at a time, it syncronizes IO on IA64/Altix systems */
2912 static int __igb_maybe_stop_tx(struct net_device
*netdev
,
2913 struct igb_ring
*tx_ring
, int size
)
2915 struct igb_adapter
*adapter
= netdev_priv(netdev
);
2917 netif_stop_subqueue(netdev
, tx_ring
->queue_index
);
2919 /* Herbert's original patch had:
2920 * smp_mb__after_netif_stop_queue();
2921 * but since that doesn't exist yet, just open code it. */
2924 /* We need to check again in a case another CPU has just
2925 * made room available. */
2926 if (IGB_DESC_UNUSED(tx_ring
) < size
)
2930 netif_wake_subqueue(netdev
, tx_ring
->queue_index
);
2931 ++adapter
->restart_queue
;
2935 static int igb_maybe_stop_tx(struct net_device
*netdev
,
2936 struct igb_ring
*tx_ring
, int size
)
2938 if (IGB_DESC_UNUSED(tx_ring
) >= size
)
2940 return __igb_maybe_stop_tx(netdev
, tx_ring
, size
);
2943 #define TXD_USE_COUNT(S) (((S) >> (IGB_MAX_TXD_PWR)) + 1)
2945 static int igb_xmit_frame_ring_adv(struct sk_buff
*skb
,
2946 struct net_device
*netdev
,
2947 struct igb_ring
*tx_ring
)
2949 struct igb_adapter
*adapter
= netdev_priv(netdev
);
2951 unsigned int tx_flags
= 0;
2956 len
= skb_headlen(skb
);
2958 if (test_bit(__IGB_DOWN
, &adapter
->state
)) {
2959 dev_kfree_skb_any(skb
);
2960 return NETDEV_TX_OK
;
2963 if (skb
->len
<= 0) {
2964 dev_kfree_skb_any(skb
);
2965 return NETDEV_TX_OK
;
2968 /* need: 1 descriptor per page,
2969 * + 2 desc gap to keep tail from touching head,
2970 * + 1 desc for skb->data,
2971 * + 1 desc for context descriptor,
2972 * otherwise try next time */
2973 if (igb_maybe_stop_tx(netdev
, tx_ring
, skb_shinfo(skb
)->nr_frags
+ 4)) {
2974 /* this is a hard error */
2975 return NETDEV_TX_BUSY
;
2979 if (adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
2980 tx_flags
|= IGB_TX_FLAGS_VLAN
;
2981 tx_flags
|= (vlan_tx_tag_get(skb
) << IGB_TX_FLAGS_VLAN_SHIFT
);
2984 if (skb
->protocol
== htons(ETH_P_IP
))
2985 tx_flags
|= IGB_TX_FLAGS_IPV4
;
2987 first
= tx_ring
->next_to_use
;
2989 tso
= skb_is_gso(skb
) ? igb_tso_adv(adapter
, tx_ring
, skb
, tx_flags
,
2993 dev_kfree_skb_any(skb
);
2994 return NETDEV_TX_OK
;
2998 tx_flags
|= IGB_TX_FLAGS_TSO
;
2999 else if (igb_tx_csum_adv(adapter
, tx_ring
, skb
, tx_flags
))
3000 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
3001 tx_flags
|= IGB_TX_FLAGS_CSUM
;
3003 igb_tx_queue_adv(adapter
, tx_ring
, tx_flags
,
3004 igb_tx_map_adv(adapter
, tx_ring
, skb
, first
),
3007 netdev
->trans_start
= jiffies
;
3009 /* Make sure there is space in the ring for the next send. */
3010 igb_maybe_stop_tx(netdev
, tx_ring
, MAX_SKB_FRAGS
+ 4);
3012 return NETDEV_TX_OK
;
3015 static int igb_xmit_frame_adv(struct sk_buff
*skb
, struct net_device
*netdev
)
3017 struct igb_adapter
*adapter
= netdev_priv(netdev
);
3018 struct igb_ring
*tx_ring
;
3021 r_idx
= skb
->queue_mapping
& (IGB_MAX_TX_QUEUES
- 1);
3022 tx_ring
= adapter
->multi_tx_table
[r_idx
];
3024 /* This goes back to the question of how to logically map a tx queue
3025 * to a flow. Right now, performance is impacted slightly negatively
3026 * if using multiple tx queues. If the stack breaks away from a
3027 * single qdisc implementation, we can look at this again. */
3028 return (igb_xmit_frame_ring_adv(skb
, netdev
, tx_ring
));
3032 * igb_tx_timeout - Respond to a Tx Hang
3033 * @netdev: network interface device structure
3035 static void igb_tx_timeout(struct net_device
*netdev
)
3037 struct igb_adapter
*adapter
= netdev_priv(netdev
);
3038 struct e1000_hw
*hw
= &adapter
->hw
;
3040 /* Do the reset outside of interrupt context */
3041 adapter
->tx_timeout_count
++;
3042 schedule_work(&adapter
->reset_task
);
3043 wr32(E1000_EICS
, adapter
->eims_enable_mask
&
3044 ~(E1000_EIMS_TCP_TIMER
| E1000_EIMS_OTHER
));
3047 static void igb_reset_task(struct work_struct
*work
)
3049 struct igb_adapter
*adapter
;
3050 adapter
= container_of(work
, struct igb_adapter
, reset_task
);
3052 igb_reinit_locked(adapter
);
3056 * igb_get_stats - Get System Network Statistics
3057 * @netdev: network interface device structure
3059 * Returns the address of the device statistics structure.
3060 * The statistics are actually updated from the timer callback.
3062 static struct net_device_stats
*
3063 igb_get_stats(struct net_device
*netdev
)
3065 struct igb_adapter
*adapter
= netdev_priv(netdev
);
3067 /* only return the current stats */
3068 return &adapter
->net_stats
;
3072 * igb_change_mtu - Change the Maximum Transfer Unit
3073 * @netdev: network interface device structure
3074 * @new_mtu: new value for maximum frame size
3076 * Returns 0 on success, negative on failure
3078 static int igb_change_mtu(struct net_device
*netdev
, int new_mtu
)
3080 struct igb_adapter
*adapter
= netdev_priv(netdev
);
3081 int max_frame
= new_mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
3083 if ((max_frame
< ETH_ZLEN
+ ETH_FCS_LEN
) ||
3084 (max_frame
> MAX_JUMBO_FRAME_SIZE
)) {
3085 dev_err(&adapter
->pdev
->dev
, "Invalid MTU setting\n");
3089 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3090 if (max_frame
> MAX_STD_JUMBO_FRAME_SIZE
) {
3091 dev_err(&adapter
->pdev
->dev
, "MTU > 9216 not supported.\n");
3095 while (test_and_set_bit(__IGB_RESETTING
, &adapter
->state
))
3097 /* igb_down has a dependency on max_frame_size */
3098 adapter
->max_frame_size
= max_frame
;
3099 if (netif_running(netdev
))
3102 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3103 * means we reserve 2 more, this pushes us to allocate from the next
3105 * i.e. RXBUFFER_2048 --> size-4096 slab
3108 if (max_frame
<= IGB_RXBUFFER_256
)
3109 adapter
->rx_buffer_len
= IGB_RXBUFFER_256
;
3110 else if (max_frame
<= IGB_RXBUFFER_512
)
3111 adapter
->rx_buffer_len
= IGB_RXBUFFER_512
;
3112 else if (max_frame
<= IGB_RXBUFFER_1024
)
3113 adapter
->rx_buffer_len
= IGB_RXBUFFER_1024
;
3114 else if (max_frame
<= IGB_RXBUFFER_2048
)
3115 adapter
->rx_buffer_len
= IGB_RXBUFFER_2048
;
3117 #if (PAGE_SIZE / 2) > IGB_RXBUFFER_16384
3118 adapter
->rx_buffer_len
= IGB_RXBUFFER_16384
;
3120 adapter
->rx_buffer_len
= PAGE_SIZE
/ 2;
3122 /* adjust allocation if LPE protects us, and we aren't using SBP */
3123 if ((max_frame
== ETH_FRAME_LEN
+ ETH_FCS_LEN
) ||
3124 (max_frame
== MAXIMUM_ETHERNET_VLAN_SIZE
))
3125 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
3127 dev_info(&adapter
->pdev
->dev
, "changing MTU from %d to %d\n",
3128 netdev
->mtu
, new_mtu
);
3129 netdev
->mtu
= new_mtu
;
3131 if (netif_running(netdev
))
3136 clear_bit(__IGB_RESETTING
, &adapter
->state
);
3142 * igb_update_stats - Update the board statistics counters
3143 * @adapter: board private structure
3146 void igb_update_stats(struct igb_adapter
*adapter
)
3148 struct e1000_hw
*hw
= &adapter
->hw
;
3149 struct pci_dev
*pdev
= adapter
->pdev
;
3152 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3155 * Prevent stats update while adapter is being reset, or if the pci
3156 * connection is down.
3158 if (adapter
->link_speed
== 0)
3160 if (pci_channel_offline(pdev
))
3163 adapter
->stats
.crcerrs
+= rd32(E1000_CRCERRS
);
3164 adapter
->stats
.gprc
+= rd32(E1000_GPRC
);
3165 adapter
->stats
.gorc
+= rd32(E1000_GORCL
);
3166 rd32(E1000_GORCH
); /* clear GORCL */
3167 adapter
->stats
.bprc
+= rd32(E1000_BPRC
);
3168 adapter
->stats
.mprc
+= rd32(E1000_MPRC
);
3169 adapter
->stats
.roc
+= rd32(E1000_ROC
);
3171 adapter
->stats
.prc64
+= rd32(E1000_PRC64
);
3172 adapter
->stats
.prc127
+= rd32(E1000_PRC127
);
3173 adapter
->stats
.prc255
+= rd32(E1000_PRC255
);
3174 adapter
->stats
.prc511
+= rd32(E1000_PRC511
);
3175 adapter
->stats
.prc1023
+= rd32(E1000_PRC1023
);
3176 adapter
->stats
.prc1522
+= rd32(E1000_PRC1522
);
3177 adapter
->stats
.symerrs
+= rd32(E1000_SYMERRS
);
3178 adapter
->stats
.sec
+= rd32(E1000_SEC
);
3180 adapter
->stats
.mpc
+= rd32(E1000_MPC
);
3181 adapter
->stats
.scc
+= rd32(E1000_SCC
);
3182 adapter
->stats
.ecol
+= rd32(E1000_ECOL
);
3183 adapter
->stats
.mcc
+= rd32(E1000_MCC
);
3184 adapter
->stats
.latecol
+= rd32(E1000_LATECOL
);
3185 adapter
->stats
.dc
+= rd32(E1000_DC
);
3186 adapter
->stats
.rlec
+= rd32(E1000_RLEC
);
3187 adapter
->stats
.xonrxc
+= rd32(E1000_XONRXC
);
3188 adapter
->stats
.xontxc
+= rd32(E1000_XONTXC
);
3189 adapter
->stats
.xoffrxc
+= rd32(E1000_XOFFRXC
);
3190 adapter
->stats
.xofftxc
+= rd32(E1000_XOFFTXC
);
3191 adapter
->stats
.fcruc
+= rd32(E1000_FCRUC
);
3192 adapter
->stats
.gptc
+= rd32(E1000_GPTC
);
3193 adapter
->stats
.gotc
+= rd32(E1000_GOTCL
);
3194 rd32(E1000_GOTCH
); /* clear GOTCL */
3195 adapter
->stats
.rnbc
+= rd32(E1000_RNBC
);
3196 adapter
->stats
.ruc
+= rd32(E1000_RUC
);
3197 adapter
->stats
.rfc
+= rd32(E1000_RFC
);
3198 adapter
->stats
.rjc
+= rd32(E1000_RJC
);
3199 adapter
->stats
.tor
+= rd32(E1000_TORH
);
3200 adapter
->stats
.tot
+= rd32(E1000_TOTH
);
3201 adapter
->stats
.tpr
+= rd32(E1000_TPR
);
3203 adapter
->stats
.ptc64
+= rd32(E1000_PTC64
);
3204 adapter
->stats
.ptc127
+= rd32(E1000_PTC127
);
3205 adapter
->stats
.ptc255
+= rd32(E1000_PTC255
);
3206 adapter
->stats
.ptc511
+= rd32(E1000_PTC511
);
3207 adapter
->stats
.ptc1023
+= rd32(E1000_PTC1023
);
3208 adapter
->stats
.ptc1522
+= rd32(E1000_PTC1522
);
3210 adapter
->stats
.mptc
+= rd32(E1000_MPTC
);
3211 adapter
->stats
.bptc
+= rd32(E1000_BPTC
);
3213 /* used for adaptive IFS */
3215 hw
->mac
.tx_packet_delta
= rd32(E1000_TPT
);
3216 adapter
->stats
.tpt
+= hw
->mac
.tx_packet_delta
;
3217 hw
->mac
.collision_delta
= rd32(E1000_COLC
);
3218 adapter
->stats
.colc
+= hw
->mac
.collision_delta
;
3220 adapter
->stats
.algnerrc
+= rd32(E1000_ALGNERRC
);
3221 adapter
->stats
.rxerrc
+= rd32(E1000_RXERRC
);
3222 adapter
->stats
.tncrs
+= rd32(E1000_TNCRS
);
3223 adapter
->stats
.tsctc
+= rd32(E1000_TSCTC
);
3224 adapter
->stats
.tsctfc
+= rd32(E1000_TSCTFC
);
3226 adapter
->stats
.iac
+= rd32(E1000_IAC
);
3227 adapter
->stats
.icrxoc
+= rd32(E1000_ICRXOC
);
3228 adapter
->stats
.icrxptc
+= rd32(E1000_ICRXPTC
);
3229 adapter
->stats
.icrxatc
+= rd32(E1000_ICRXATC
);
3230 adapter
->stats
.ictxptc
+= rd32(E1000_ICTXPTC
);
3231 adapter
->stats
.ictxatc
+= rd32(E1000_ICTXATC
);
3232 adapter
->stats
.ictxqec
+= rd32(E1000_ICTXQEC
);
3233 adapter
->stats
.ictxqmtc
+= rd32(E1000_ICTXQMTC
);
3234 adapter
->stats
.icrxdmtc
+= rd32(E1000_ICRXDMTC
);
3236 /* Fill out the OS statistics structure */
3237 adapter
->net_stats
.multicast
= adapter
->stats
.mprc
;
3238 adapter
->net_stats
.collisions
= adapter
->stats
.colc
;
3242 /* RLEC on some newer hardware can be incorrect so build
3243 * our own version based on RUC and ROC */
3244 adapter
->net_stats
.rx_errors
= adapter
->stats
.rxerrc
+
3245 adapter
->stats
.crcerrs
+ adapter
->stats
.algnerrc
+
3246 adapter
->stats
.ruc
+ adapter
->stats
.roc
+
3247 adapter
->stats
.cexterr
;
3248 adapter
->net_stats
.rx_length_errors
= adapter
->stats
.ruc
+
3250 adapter
->net_stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
3251 adapter
->net_stats
.rx_frame_errors
= adapter
->stats
.algnerrc
;
3252 adapter
->net_stats
.rx_missed_errors
= adapter
->stats
.mpc
;
3255 adapter
->net_stats
.tx_errors
= adapter
->stats
.ecol
+
3256 adapter
->stats
.latecol
;
3257 adapter
->net_stats
.tx_aborted_errors
= adapter
->stats
.ecol
;
3258 adapter
->net_stats
.tx_window_errors
= adapter
->stats
.latecol
;
3259 adapter
->net_stats
.tx_carrier_errors
= adapter
->stats
.tncrs
;
3261 /* Tx Dropped needs to be maintained elsewhere */
3264 if (hw
->phy
.media_type
== e1000_media_type_copper
) {
3265 if ((adapter
->link_speed
== SPEED_1000
) &&
3266 (!igb_read_phy_reg(hw
, PHY_1000T_STATUS
,
3268 phy_tmp
&= PHY_IDLE_ERROR_COUNT_MASK
;
3269 adapter
->phy_stats
.idle_errors
+= phy_tmp
;
3273 /* Management Stats */
3274 adapter
->stats
.mgptc
+= rd32(E1000_MGTPTC
);
3275 adapter
->stats
.mgprc
+= rd32(E1000_MGTPRC
);
3276 adapter
->stats
.mgpdc
+= rd32(E1000_MGTPDC
);
3280 static irqreturn_t
igb_msix_other(int irq
, void *data
)
3282 struct net_device
*netdev
= data
;
3283 struct igb_adapter
*adapter
= netdev_priv(netdev
);
3284 struct e1000_hw
*hw
= &adapter
->hw
;
3285 u32 icr
= rd32(E1000_ICR
);
3287 /* reading ICR causes bit 31 of EICR to be cleared */
3289 if(icr
& E1000_ICR_DOUTSYNC
) {
3290 /* HW is reporting DMA is out of sync */
3291 adapter
->stats
.doosync
++;
3293 if (!(icr
& E1000_ICR_LSC
))
3294 goto no_link_interrupt
;
3295 hw
->mac
.get_link_status
= 1;
3296 /* guard against interrupt when we're going down */
3297 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
3298 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
3301 wr32(E1000_IMS
, E1000_IMS_LSC
| E1000_IMS_DOUTSYNC
);
3302 wr32(E1000_EIMS
, adapter
->eims_other
);
3307 static irqreturn_t
igb_msix_tx(int irq
, void *data
)
3309 struct igb_ring
*tx_ring
= data
;
3310 struct igb_adapter
*adapter
= tx_ring
->adapter
;
3311 struct e1000_hw
*hw
= &adapter
->hw
;
3313 #ifdef CONFIG_IGB_DCA
3314 if (adapter
->flags
& IGB_FLAG_DCA_ENABLED
)
3315 igb_update_tx_dca(tx_ring
);
3317 tx_ring
->total_bytes
= 0;
3318 tx_ring
->total_packets
= 0;
3320 /* auto mask will automatically reenable the interrupt when we write
3322 if (!igb_clean_tx_irq(tx_ring
))
3323 /* Ring was not completely cleaned, so fire another interrupt */
3324 wr32(E1000_EICS
, tx_ring
->eims_value
);
3326 wr32(E1000_EIMS
, tx_ring
->eims_value
);
3331 static void igb_write_itr(struct igb_ring
*ring
)
3333 struct e1000_hw
*hw
= &ring
->adapter
->hw
;
3334 if ((ring
->adapter
->itr_setting
& 3) && ring
->set_itr
) {
3335 switch (hw
->mac
.type
) {
3337 wr32(ring
->itr_register
,
3342 wr32(ring
->itr_register
,
3344 (ring
->itr_val
<< 16));
3351 static irqreturn_t
igb_msix_rx(int irq
, void *data
)
3353 struct igb_ring
*rx_ring
= data
;
3355 /* Write the ITR value calculated at the end of the
3356 * previous interrupt.
3359 igb_write_itr(rx_ring
);
3361 if (napi_schedule_prep(&rx_ring
->napi
))
3362 __napi_schedule(&rx_ring
->napi
);
3364 #ifdef CONFIG_IGB_DCA
3365 if (rx_ring
->adapter
->flags
& IGB_FLAG_DCA_ENABLED
)
3366 igb_update_rx_dca(rx_ring
);
3371 #ifdef CONFIG_IGB_DCA
3372 static void igb_update_rx_dca(struct igb_ring
*rx_ring
)
3375 struct igb_adapter
*adapter
= rx_ring
->adapter
;
3376 struct e1000_hw
*hw
= &adapter
->hw
;
3377 int cpu
= get_cpu();
3378 int q
= rx_ring
->reg_idx
;
3380 if (rx_ring
->cpu
!= cpu
) {
3381 dca_rxctrl
= rd32(E1000_DCA_RXCTRL(q
));
3382 if (hw
->mac
.type
== e1000_82576
) {
3383 dca_rxctrl
&= ~E1000_DCA_RXCTRL_CPUID_MASK_82576
;
3384 dca_rxctrl
|= dca_get_tag(cpu
) <<
3385 E1000_DCA_RXCTRL_CPUID_SHIFT
;
3387 dca_rxctrl
&= ~E1000_DCA_RXCTRL_CPUID_MASK
;
3388 dca_rxctrl
|= dca_get_tag(cpu
);
3390 dca_rxctrl
|= E1000_DCA_RXCTRL_DESC_DCA_EN
;
3391 dca_rxctrl
|= E1000_DCA_RXCTRL_HEAD_DCA_EN
;
3392 dca_rxctrl
|= E1000_DCA_RXCTRL_DATA_DCA_EN
;
3393 wr32(E1000_DCA_RXCTRL(q
), dca_rxctrl
);
3399 static void igb_update_tx_dca(struct igb_ring
*tx_ring
)
3402 struct igb_adapter
*adapter
= tx_ring
->adapter
;
3403 struct e1000_hw
*hw
= &adapter
->hw
;
3404 int cpu
= get_cpu();
3405 int q
= tx_ring
->reg_idx
;
3407 if (tx_ring
->cpu
!= cpu
) {
3408 dca_txctrl
= rd32(E1000_DCA_TXCTRL(q
));
3409 if (hw
->mac
.type
== e1000_82576
) {
3410 dca_txctrl
&= ~E1000_DCA_TXCTRL_CPUID_MASK_82576
;
3411 dca_txctrl
|= dca_get_tag(cpu
) <<
3412 E1000_DCA_TXCTRL_CPUID_SHIFT
;
3414 dca_txctrl
&= ~E1000_DCA_TXCTRL_CPUID_MASK
;
3415 dca_txctrl
|= dca_get_tag(cpu
);
3417 dca_txctrl
|= E1000_DCA_TXCTRL_DESC_DCA_EN
;
3418 wr32(E1000_DCA_TXCTRL(q
), dca_txctrl
);
3424 static void igb_setup_dca(struct igb_adapter
*adapter
)
3428 if (!(adapter
->flags
& IGB_FLAG_DCA_ENABLED
))
3431 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
3432 adapter
->tx_ring
[i
].cpu
= -1;
3433 igb_update_tx_dca(&adapter
->tx_ring
[i
]);
3435 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
3436 adapter
->rx_ring
[i
].cpu
= -1;
3437 igb_update_rx_dca(&adapter
->rx_ring
[i
]);
3441 static int __igb_notify_dca(struct device
*dev
, void *data
)
3443 struct net_device
*netdev
= dev_get_drvdata(dev
);
3444 struct igb_adapter
*adapter
= netdev_priv(netdev
);
3445 struct e1000_hw
*hw
= &adapter
->hw
;
3446 unsigned long event
= *(unsigned long *)data
;
3449 case DCA_PROVIDER_ADD
:
3450 /* if already enabled, don't do it again */
3451 if (adapter
->flags
& IGB_FLAG_DCA_ENABLED
)
3453 /* Always use CB2 mode, difference is masked
3454 * in the CB driver. */
3455 wr32(E1000_DCA_CTRL
, 2);
3456 if (dca_add_requester(dev
) == 0) {
3457 adapter
->flags
|= IGB_FLAG_DCA_ENABLED
;
3458 dev_info(&adapter
->pdev
->dev
, "DCA enabled\n");
3459 igb_setup_dca(adapter
);
3462 /* Fall Through since DCA is disabled. */
3463 case DCA_PROVIDER_REMOVE
:
3464 if (adapter
->flags
& IGB_FLAG_DCA_ENABLED
) {
3465 /* without this a class_device is left
3466 * hanging around in the sysfs model */
3467 dca_remove_requester(dev
);
3468 dev_info(&adapter
->pdev
->dev
, "DCA disabled\n");
3469 adapter
->flags
&= ~IGB_FLAG_DCA_ENABLED
;
3470 wr32(E1000_DCA_CTRL
, 1);
3478 static int igb_notify_dca(struct notifier_block
*nb
, unsigned long event
,
3483 ret_val
= driver_for_each_device(&igb_driver
.driver
, NULL
, &event
,
3486 return ret_val
? NOTIFY_BAD
: NOTIFY_DONE
;
3488 #endif /* CONFIG_IGB_DCA */
3491 * igb_intr_msi - Interrupt Handler
3492 * @irq: interrupt number
3493 * @data: pointer to a network interface device structure
3495 static irqreturn_t
igb_intr_msi(int irq
, void *data
)
3497 struct net_device
*netdev
= data
;
3498 struct igb_adapter
*adapter
= netdev_priv(netdev
);
3499 struct e1000_hw
*hw
= &adapter
->hw
;
3500 /* read ICR disables interrupts using IAM */
3501 u32 icr
= rd32(E1000_ICR
);
3503 igb_write_itr(adapter
->rx_ring
);
3505 if(icr
& E1000_ICR_DOUTSYNC
) {
3506 /* HW is reporting DMA is out of sync */
3507 adapter
->stats
.doosync
++;
3510 if (icr
& (E1000_ICR_RXSEQ
| E1000_ICR_LSC
)) {
3511 hw
->mac
.get_link_status
= 1;
3512 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
3513 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
3516 napi_schedule(&adapter
->rx_ring
[0].napi
);
3522 * igb_intr - Interrupt Handler
3523 * @irq: interrupt number
3524 * @data: pointer to a network interface device structure
3526 static irqreturn_t
igb_intr(int irq
, void *data
)
3528 struct net_device
*netdev
= data
;
3529 struct igb_adapter
*adapter
= netdev_priv(netdev
);
3530 struct e1000_hw
*hw
= &adapter
->hw
;
3531 /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked. No
3532 * need for the IMC write */
3533 u32 icr
= rd32(E1000_ICR
);
3536 return IRQ_NONE
; /* Not our interrupt */
3538 igb_write_itr(adapter
->rx_ring
);
3540 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3541 * not set, then the adapter didn't send an interrupt */
3542 if (!(icr
& E1000_ICR_INT_ASSERTED
))
3545 if(icr
& E1000_ICR_DOUTSYNC
) {
3546 /* HW is reporting DMA is out of sync */
3547 adapter
->stats
.doosync
++;
3550 eicr
= rd32(E1000_EICR
);
3552 if (icr
& (E1000_ICR_RXSEQ
| E1000_ICR_LSC
)) {
3553 hw
->mac
.get_link_status
= 1;
3554 /* guard against interrupt when we're going down */
3555 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
3556 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
3559 napi_schedule(&adapter
->rx_ring
[0].napi
);
3565 * igb_poll - NAPI Rx polling callback
3566 * @napi: napi polling structure
3567 * @budget: count of how many packets we should handle
3569 static int igb_poll(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 net_device
*netdev
= adapter
->netdev
;
3574 int tx_clean_complete
, work_done
= 0;
3576 /* this poll routine only supports one tx and one rx queue */
3577 #ifdef CONFIG_IGB_DCA
3578 if (adapter
->flags
& IGB_FLAG_DCA_ENABLED
)
3579 igb_update_tx_dca(&adapter
->tx_ring
[0]);
3581 tx_clean_complete
= igb_clean_tx_irq(&adapter
->tx_ring
[0]);
3583 #ifdef CONFIG_IGB_DCA
3584 if (adapter
->flags
& IGB_FLAG_DCA_ENABLED
)
3585 igb_update_rx_dca(&adapter
->rx_ring
[0]);
3587 igb_clean_rx_irq_adv(&adapter
->rx_ring
[0], &work_done
, budget
);
3589 /* If no Tx and not enough Rx work done, exit the polling mode */
3590 if ((tx_clean_complete
&& (work_done
< budget
)) ||
3591 !netif_running(netdev
)) {
3592 if (adapter
->itr_setting
& 3)
3593 igb_set_itr(adapter
);
3594 napi_complete(napi
);
3595 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
3596 igb_irq_enable(adapter
);
3603 static int igb_clean_rx_ring_msix(struct napi_struct
*napi
, int budget
)
3605 struct igb_ring
*rx_ring
= container_of(napi
, struct igb_ring
, napi
);
3606 struct igb_adapter
*adapter
= rx_ring
->adapter
;
3607 struct e1000_hw
*hw
= &adapter
->hw
;
3608 struct net_device
*netdev
= adapter
->netdev
;
3611 #ifdef CONFIG_IGB_DCA
3612 if (adapter
->flags
& IGB_FLAG_DCA_ENABLED
)
3613 igb_update_rx_dca(rx_ring
);
3615 igb_clean_rx_irq_adv(rx_ring
, &work_done
, budget
);
3618 /* If not enough Rx work done, exit the polling mode */
3619 if ((work_done
== 0) || !netif_running(netdev
)) {
3620 napi_complete(napi
);
3622 if (adapter
->itr_setting
& 3) {
3623 if (adapter
->num_rx_queues
== 1)
3624 igb_set_itr(adapter
);
3626 igb_update_ring_itr(rx_ring
);
3629 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
3630 wr32(E1000_EIMS
, rx_ring
->eims_value
);
3639 * igb_clean_tx_irq - Reclaim resources after transmit completes
3640 * @adapter: board private structure
3641 * returns true if ring is completely cleaned
3643 static bool igb_clean_tx_irq(struct igb_ring
*tx_ring
)
3645 struct igb_adapter
*adapter
= tx_ring
->adapter
;
3646 struct net_device
*netdev
= adapter
->netdev
;
3647 struct e1000_hw
*hw
= &adapter
->hw
;
3648 struct igb_buffer
*buffer_info
;
3649 struct sk_buff
*skb
;
3650 union e1000_adv_tx_desc
*tx_desc
, *eop_desc
;
3651 unsigned int total_bytes
= 0, total_packets
= 0;
3652 unsigned int i
, eop
, count
= 0;
3653 bool cleaned
= false;
3655 i
= tx_ring
->next_to_clean
;
3656 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3657 eop_desc
= E1000_TX_DESC_ADV(*tx_ring
, eop
);
3659 while ((eop_desc
->wb
.status
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
3660 (count
< tx_ring
->count
)) {
3661 for (cleaned
= false; !cleaned
; count
++) {
3662 tx_desc
= E1000_TX_DESC_ADV(*tx_ring
, i
);
3663 buffer_info
= &tx_ring
->buffer_info
[i
];
3664 cleaned
= (i
== eop
);
3665 skb
= buffer_info
->skb
;
3668 unsigned int segs
, bytecount
;
3669 /* gso_segs is currently only valid for tcp */
3670 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
3671 /* multiply data chunks by size of headers */
3672 bytecount
= ((segs
- 1) * skb_headlen(skb
)) +
3674 total_packets
+= segs
;
3675 total_bytes
+= bytecount
;
3678 igb_unmap_and_free_tx_resource(adapter
, buffer_info
);
3679 tx_desc
->wb
.status
= 0;
3682 if (i
== tx_ring
->count
)
3686 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3687 eop_desc
= E1000_TX_DESC_ADV(*tx_ring
, eop
);
3690 tx_ring
->next_to_clean
= i
;
3692 if (unlikely(count
&&
3693 netif_carrier_ok(netdev
) &&
3694 IGB_DESC_UNUSED(tx_ring
) >= IGB_TX_QUEUE_WAKE
)) {
3695 /* Make sure that anybody stopping the queue after this
3696 * sees the new next_to_clean.
3699 if (__netif_subqueue_stopped(netdev
, tx_ring
->queue_index
) &&
3700 !(test_bit(__IGB_DOWN
, &adapter
->state
))) {
3701 netif_wake_subqueue(netdev
, tx_ring
->queue_index
);
3702 ++adapter
->restart_queue
;
3706 if (tx_ring
->detect_tx_hung
) {
3707 /* Detect a transmit hang in hardware, this serializes the
3708 * check with the clearing of time_stamp and movement of i */
3709 tx_ring
->detect_tx_hung
= false;
3710 if (tx_ring
->buffer_info
[i
].time_stamp
&&
3711 time_after(jiffies
, tx_ring
->buffer_info
[i
].time_stamp
+
3712 (adapter
->tx_timeout_factor
* HZ
))
3713 && !(rd32(E1000_STATUS
) &
3714 E1000_STATUS_TXOFF
)) {
3716 /* detected Tx unit hang */
3717 dev_err(&adapter
->pdev
->dev
,
3718 "Detected Tx Unit Hang\n"
3722 " next_to_use <%x>\n"
3723 " next_to_clean <%x>\n"
3724 "buffer_info[next_to_clean]\n"
3725 " time_stamp <%lx>\n"
3726 " next_to_watch <%x>\n"
3728 " desc.status <%x>\n",
3729 tx_ring
->queue_index
,
3730 readl(adapter
->hw
.hw_addr
+ tx_ring
->head
),
3731 readl(adapter
->hw
.hw_addr
+ tx_ring
->tail
),
3732 tx_ring
->next_to_use
,
3733 tx_ring
->next_to_clean
,
3734 tx_ring
->buffer_info
[i
].time_stamp
,
3737 eop_desc
->wb
.status
);
3738 netif_stop_subqueue(netdev
, tx_ring
->queue_index
);
3741 tx_ring
->total_bytes
+= total_bytes
;
3742 tx_ring
->total_packets
+= total_packets
;
3743 tx_ring
->tx_stats
.bytes
+= total_bytes
;
3744 tx_ring
->tx_stats
.packets
+= total_packets
;
3745 adapter
->net_stats
.tx_bytes
+= total_bytes
;
3746 adapter
->net_stats
.tx_packets
+= total_packets
;
3747 return (count
< tx_ring
->count
);
3751 * igb_receive_skb - helper function to handle rx indications
3752 * @ring: pointer to receive ring receving this packet
3753 * @status: descriptor status field as written by hardware
3754 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3755 * @skb: pointer to sk_buff to be indicated to stack
3757 static void igb_receive_skb(struct igb_ring
*ring
, u8 status
,
3758 union e1000_adv_rx_desc
* rx_desc
,
3759 struct sk_buff
*skb
)
3761 struct igb_adapter
* adapter
= ring
->adapter
;
3762 bool vlan_extracted
= (adapter
->vlgrp
&& (status
& E1000_RXD_STAT_VP
));
3764 skb_record_rx_queue(skb
, ring
->queue_index
);
3765 if (skb
->ip_summed
== CHECKSUM_UNNECESSARY
) {
3767 vlan_gro_receive(&ring
->napi
, adapter
->vlgrp
,
3768 le16_to_cpu(rx_desc
->wb
.upper
.vlan
),
3771 napi_gro_receive(&ring
->napi
, skb
);
3774 vlan_hwaccel_receive_skb(skb
, adapter
->vlgrp
,
3775 le16_to_cpu(rx_desc
->wb
.upper
.vlan
));
3777 netif_receive_skb(skb
);
3782 static inline void igb_rx_checksum_adv(struct igb_adapter
*adapter
,
3783 u32 status_err
, struct sk_buff
*skb
)
3785 skb
->ip_summed
= CHECKSUM_NONE
;
3787 /* Ignore Checksum bit is set or checksum is disabled through ethtool */
3788 if ((status_err
& E1000_RXD_STAT_IXSM
) || !adapter
->rx_csum
)
3790 /* TCP/UDP checksum error bit is set */
3792 (E1000_RXDEXT_STATERR_TCPE
| E1000_RXDEXT_STATERR_IPE
)) {
3793 /* let the stack verify checksum errors */
3794 adapter
->hw_csum_err
++;
3797 /* It must be a TCP or UDP packet with a valid checksum */
3798 if (status_err
& (E1000_RXD_STAT_TCPCS
| E1000_RXD_STAT_UDPCS
))
3799 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
3801 adapter
->hw_csum_good
++;
3804 static bool igb_clean_rx_irq_adv(struct igb_ring
*rx_ring
,
3805 int *work_done
, int budget
)
3807 struct igb_adapter
*adapter
= rx_ring
->adapter
;
3808 struct net_device
*netdev
= adapter
->netdev
;
3809 struct pci_dev
*pdev
= adapter
->pdev
;
3810 union e1000_adv_rx_desc
*rx_desc
, *next_rxd
;
3811 struct igb_buffer
*buffer_info
, *next_buffer
;
3812 struct sk_buff
*skb
;
3814 u32 length
, hlen
, staterr
;
3815 bool cleaned
= false;
3816 int cleaned_count
= 0;
3817 unsigned int total_bytes
= 0, total_packets
= 0;
3819 i
= rx_ring
->next_to_clean
;
3820 buffer_info
= &rx_ring
->buffer_info
[i
];
3821 rx_desc
= E1000_RX_DESC_ADV(*rx_ring
, i
);
3822 staterr
= le32_to_cpu(rx_desc
->wb
.upper
.status_error
);
3824 while (staterr
& E1000_RXD_STAT_DD
) {
3825 if (*work_done
>= budget
)
3829 skb
= buffer_info
->skb
;
3830 prefetch(skb
->data
- NET_IP_ALIGN
);
3831 buffer_info
->skb
= NULL
;
3834 if (i
== rx_ring
->count
)
3836 next_rxd
= E1000_RX_DESC_ADV(*rx_ring
, i
);
3838 next_buffer
= &rx_ring
->buffer_info
[i
];
3840 length
= le16_to_cpu(rx_desc
->wb
.upper
.length
);
3844 if (!adapter
->rx_ps_hdr_size
) {
3845 pci_unmap_single(pdev
, buffer_info
->dma
,
3846 adapter
->rx_buffer_len
+
3848 PCI_DMA_FROMDEVICE
);
3849 skb_put(skb
, length
);
3853 /* HW will not DMA in data larger than the given buffer, even
3854 * if it parses the (NFS, of course) header to be larger. In
3855 * that case, it fills the header buffer and spills the rest
3858 hlen
= (le16_to_cpu(rx_desc
->wb
.lower
.lo_dword
.hdr_info
) &
3859 E1000_RXDADV_HDRBUFLEN_MASK
) >> E1000_RXDADV_HDRBUFLEN_SHIFT
;
3860 if (hlen
> adapter
->rx_ps_hdr_size
)
3861 hlen
= adapter
->rx_ps_hdr_size
;
3863 if (!skb_shinfo(skb
)->nr_frags
) {
3864 pci_unmap_single(pdev
, buffer_info
->dma
,
3865 adapter
->rx_ps_hdr_size
+
3867 PCI_DMA_FROMDEVICE
);
3872 pci_unmap_page(pdev
, buffer_info
->page_dma
,
3873 PAGE_SIZE
/ 2, PCI_DMA_FROMDEVICE
);
3874 buffer_info
->page_dma
= 0;
3876 skb_fill_page_desc(skb
, skb_shinfo(skb
)->nr_frags
++,
3878 buffer_info
->page_offset
,
3881 if ((adapter
->rx_buffer_len
> (PAGE_SIZE
/ 2)) ||
3882 (page_count(buffer_info
->page
) != 1))
3883 buffer_info
->page
= NULL
;
3885 get_page(buffer_info
->page
);
3888 skb
->data_len
+= length
;
3890 skb
->truesize
+= length
;
3893 if (!(staterr
& E1000_RXD_STAT_EOP
)) {
3894 buffer_info
->skb
= next_buffer
->skb
;
3895 buffer_info
->dma
= next_buffer
->dma
;
3896 next_buffer
->skb
= skb
;
3897 next_buffer
->dma
= 0;
3901 if (staterr
& E1000_RXDEXT_ERR_FRAME_ERR_MASK
) {
3902 dev_kfree_skb_irq(skb
);
3906 total_bytes
+= skb
->len
;
3909 igb_rx_checksum_adv(adapter
, staterr
, skb
);
3911 skb
->protocol
= eth_type_trans(skb
, netdev
);
3913 igb_receive_skb(rx_ring
, staterr
, rx_desc
, skb
);
3916 rx_desc
->wb
.upper
.status_error
= 0;
3918 /* return some buffers to hardware, one at a time is too slow */
3919 if (cleaned_count
>= IGB_RX_BUFFER_WRITE
) {
3920 igb_alloc_rx_buffers_adv(rx_ring
, cleaned_count
);
3924 /* use prefetched values */
3926 buffer_info
= next_buffer
;
3927 staterr
= le32_to_cpu(rx_desc
->wb
.upper
.status_error
);
3930 rx_ring
->next_to_clean
= i
;
3931 cleaned_count
= IGB_DESC_UNUSED(rx_ring
);
3934 igb_alloc_rx_buffers_adv(rx_ring
, cleaned_count
);
3936 rx_ring
->total_packets
+= total_packets
;
3937 rx_ring
->total_bytes
+= total_bytes
;
3938 rx_ring
->rx_stats
.packets
+= total_packets
;
3939 rx_ring
->rx_stats
.bytes
+= total_bytes
;
3940 adapter
->net_stats
.rx_bytes
+= total_bytes
;
3941 adapter
->net_stats
.rx_packets
+= total_packets
;
3947 * igb_alloc_rx_buffers_adv - Replace used receive buffers; packet split
3948 * @adapter: address of board private structure
3950 static void igb_alloc_rx_buffers_adv(struct igb_ring
*rx_ring
,
3953 struct igb_adapter
*adapter
= rx_ring
->adapter
;
3954 struct net_device
*netdev
= adapter
->netdev
;
3955 struct pci_dev
*pdev
= adapter
->pdev
;
3956 union e1000_adv_rx_desc
*rx_desc
;
3957 struct igb_buffer
*buffer_info
;
3958 struct sk_buff
*skb
;
3962 i
= rx_ring
->next_to_use
;
3963 buffer_info
= &rx_ring
->buffer_info
[i
];
3965 if (adapter
->rx_ps_hdr_size
)
3966 bufsz
= adapter
->rx_ps_hdr_size
;
3968 bufsz
= adapter
->rx_buffer_len
;
3969 bufsz
+= NET_IP_ALIGN
;
3971 while (cleaned_count
--) {
3972 rx_desc
= E1000_RX_DESC_ADV(*rx_ring
, i
);
3974 if (adapter
->rx_ps_hdr_size
&& !buffer_info
->page_dma
) {
3975 if (!buffer_info
->page
) {
3976 buffer_info
->page
= alloc_page(GFP_ATOMIC
);
3977 if (!buffer_info
->page
) {
3978 adapter
->alloc_rx_buff_failed
++;
3981 buffer_info
->page_offset
= 0;
3983 buffer_info
->page_offset
^= PAGE_SIZE
/ 2;
3985 buffer_info
->page_dma
=
3986 pci_map_page(pdev
, buffer_info
->page
,
3987 buffer_info
->page_offset
,
3989 PCI_DMA_FROMDEVICE
);
3992 if (!buffer_info
->skb
) {
3993 skb
= netdev_alloc_skb(netdev
, bufsz
);
3995 adapter
->alloc_rx_buff_failed
++;
3999 /* Make buffer alignment 2 beyond a 16 byte boundary
4000 * this will result in a 16 byte aligned IP header after
4001 * the 14 byte MAC header is removed
4003 skb_reserve(skb
, NET_IP_ALIGN
);
4005 buffer_info
->skb
= skb
;
4006 buffer_info
->dma
= pci_map_single(pdev
, skb
->data
,
4008 PCI_DMA_FROMDEVICE
);
4010 /* Refresh the desc even if buffer_addrs didn't change because
4011 * each write-back erases this info. */
4012 if (adapter
->rx_ps_hdr_size
) {
4013 rx_desc
->read
.pkt_addr
=
4014 cpu_to_le64(buffer_info
->page_dma
);
4015 rx_desc
->read
.hdr_addr
= cpu_to_le64(buffer_info
->dma
);
4017 rx_desc
->read
.pkt_addr
=
4018 cpu_to_le64(buffer_info
->dma
);
4019 rx_desc
->read
.hdr_addr
= 0;
4023 if (i
== rx_ring
->count
)
4025 buffer_info
= &rx_ring
->buffer_info
[i
];
4029 if (rx_ring
->next_to_use
!= i
) {
4030 rx_ring
->next_to_use
= i
;
4032 i
= (rx_ring
->count
- 1);
4036 /* Force memory writes to complete before letting h/w
4037 * know there are new descriptors to fetch. (Only
4038 * applicable for weak-ordered memory model archs,
4039 * such as IA-64). */
4041 writel(i
, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
4051 static int igb_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
4053 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4054 struct mii_ioctl_data
*data
= if_mii(ifr
);
4056 if (adapter
->hw
.phy
.media_type
!= e1000_media_type_copper
)
4061 data
->phy_id
= adapter
->hw
.phy
.addr
;
4064 if (!capable(CAP_NET_ADMIN
))
4066 if (igb_read_phy_reg(&adapter
->hw
, data
->reg_num
& 0x1F,
4083 static int igb_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
4089 return igb_mii_ioctl(netdev
, ifr
, cmd
);
4095 static void igb_vlan_rx_register(struct net_device
*netdev
,
4096 struct vlan_group
*grp
)
4098 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4099 struct e1000_hw
*hw
= &adapter
->hw
;
4102 igb_irq_disable(adapter
);
4103 adapter
->vlgrp
= grp
;
4106 /* enable VLAN tag insert/strip */
4107 ctrl
= rd32(E1000_CTRL
);
4108 ctrl
|= E1000_CTRL_VME
;
4109 wr32(E1000_CTRL
, ctrl
);
4111 /* enable VLAN receive filtering */
4112 rctl
= rd32(E1000_RCTL
);
4113 rctl
&= ~E1000_RCTL_CFIEN
;
4114 wr32(E1000_RCTL
, rctl
);
4115 igb_update_mng_vlan(adapter
);
4117 adapter
->max_frame_size
+ VLAN_TAG_SIZE
);
4119 /* disable VLAN tag insert/strip */
4120 ctrl
= rd32(E1000_CTRL
);
4121 ctrl
&= ~E1000_CTRL_VME
;
4122 wr32(E1000_CTRL
, ctrl
);
4124 if (adapter
->mng_vlan_id
!= (u16
)IGB_MNG_VLAN_NONE
) {
4125 igb_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
4126 adapter
->mng_vlan_id
= IGB_MNG_VLAN_NONE
;
4129 adapter
->max_frame_size
);
4132 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
4133 igb_irq_enable(adapter
);
4136 static void igb_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
4138 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4139 struct e1000_hw
*hw
= &adapter
->hw
;
4142 if ((hw
->mng_cookie
.status
&
4143 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
4144 (vid
== adapter
->mng_vlan_id
))
4146 /* add VID to filter table */
4147 index
= (vid
>> 5) & 0x7F;
4148 vfta
= array_rd32(E1000_VFTA
, index
);
4149 vfta
|= (1 << (vid
& 0x1F));
4150 igb_write_vfta(&adapter
->hw
, index
, vfta
);
4153 static void igb_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
4155 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4156 struct e1000_hw
*hw
= &adapter
->hw
;
4159 igb_irq_disable(adapter
);
4160 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
4162 if (!test_bit(__IGB_DOWN
, &adapter
->state
))
4163 igb_irq_enable(adapter
);
4165 if ((adapter
->hw
.mng_cookie
.status
&
4166 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
4167 (vid
== adapter
->mng_vlan_id
)) {
4168 /* release control to f/w */
4169 igb_release_hw_control(adapter
);
4173 /* remove VID from filter table */
4174 index
= (vid
>> 5) & 0x7F;
4175 vfta
= array_rd32(E1000_VFTA
, index
);
4176 vfta
&= ~(1 << (vid
& 0x1F));
4177 igb_write_vfta(&adapter
->hw
, index
, vfta
);
4180 static void igb_restore_vlan(struct igb_adapter
*adapter
)
4182 igb_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
4184 if (adapter
->vlgrp
) {
4186 for (vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
4187 if (!vlan_group_get_device(adapter
->vlgrp
, vid
))
4189 igb_vlan_rx_add_vid(adapter
->netdev
, vid
);
4194 int igb_set_spd_dplx(struct igb_adapter
*adapter
, u16 spddplx
)
4196 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
4200 /* Fiber NICs only allow 1000 gbps Full duplex */
4201 if ((adapter
->hw
.phy
.media_type
== e1000_media_type_fiber
) &&
4202 spddplx
!= (SPEED_1000
+ DUPLEX_FULL
)) {
4203 dev_err(&adapter
->pdev
->dev
,
4204 "Unsupported Speed/Duplex configuration\n");
4209 case SPEED_10
+ DUPLEX_HALF
:
4210 mac
->forced_speed_duplex
= ADVERTISE_10_HALF
;
4212 case SPEED_10
+ DUPLEX_FULL
:
4213 mac
->forced_speed_duplex
= ADVERTISE_10_FULL
;
4215 case SPEED_100
+ DUPLEX_HALF
:
4216 mac
->forced_speed_duplex
= ADVERTISE_100_HALF
;
4218 case SPEED_100
+ DUPLEX_FULL
:
4219 mac
->forced_speed_duplex
= ADVERTISE_100_FULL
;
4221 case SPEED_1000
+ DUPLEX_FULL
:
4223 adapter
->hw
.phy
.autoneg_advertised
= ADVERTISE_1000_FULL
;
4225 case SPEED_1000
+ DUPLEX_HALF
: /* not supported */
4227 dev_err(&adapter
->pdev
->dev
,
4228 "Unsupported Speed/Duplex configuration\n");
4235 static int igb_suspend(struct pci_dev
*pdev
, pm_message_t state
)
4237 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4238 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4239 struct e1000_hw
*hw
= &adapter
->hw
;
4240 u32 ctrl
, rctl
, status
;
4241 u32 wufc
= adapter
->wol
;
4246 netif_device_detach(netdev
);
4248 if (netif_running(netdev
))
4251 igb_reset_interrupt_capability(adapter
);
4253 igb_free_queues(adapter
);
4256 retval
= pci_save_state(pdev
);
4261 status
= rd32(E1000_STATUS
);
4262 if (status
& E1000_STATUS_LU
)
4263 wufc
&= ~E1000_WUFC_LNKC
;
4266 igb_setup_rctl(adapter
);
4267 igb_set_multi(netdev
);
4269 /* turn on all-multi mode if wake on multicast is enabled */
4270 if (wufc
& E1000_WUFC_MC
) {
4271 rctl
= rd32(E1000_RCTL
);
4272 rctl
|= E1000_RCTL_MPE
;
4273 wr32(E1000_RCTL
, rctl
);
4276 ctrl
= rd32(E1000_CTRL
);
4277 /* advertise wake from D3Cold */
4278 #define E1000_CTRL_ADVD3WUC 0x00100000
4279 /* phy power management enable */
4280 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4281 ctrl
|= E1000_CTRL_ADVD3WUC
;
4282 wr32(E1000_CTRL
, ctrl
);
4284 /* Allow time for pending master requests to run */
4285 igb_disable_pcie_master(&adapter
->hw
);
4287 wr32(E1000_WUC
, E1000_WUC_PME_EN
);
4288 wr32(E1000_WUFC
, wufc
);
4291 wr32(E1000_WUFC
, 0);
4294 /* make sure adapter isn't asleep if manageability/wol is enabled */
4295 if (wufc
|| adapter
->en_mng_pt
) {
4296 pci_enable_wake(pdev
, PCI_D3hot
, 1);
4297 pci_enable_wake(pdev
, PCI_D3cold
, 1);
4299 igb_shutdown_fiber_serdes_link_82575(hw
);
4300 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4301 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4304 /* Release control of h/w to f/w. If f/w is AMT enabled, this
4305 * would have already happened in close and is redundant. */
4306 igb_release_hw_control(adapter
);
4308 pci_disable_device(pdev
);
4310 pci_set_power_state(pdev
, pci_choose_state(pdev
, state
));
4316 static int igb_resume(struct pci_dev
*pdev
)
4318 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4319 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4320 struct e1000_hw
*hw
= &adapter
->hw
;
4323 pci_set_power_state(pdev
, PCI_D0
);
4324 pci_restore_state(pdev
);
4326 err
= pci_enable_device_mem(pdev
);
4329 "igb: Cannot enable PCI device from suspend\n");
4332 pci_set_master(pdev
);
4334 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4335 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4337 igb_set_interrupt_capability(adapter
);
4339 if (igb_alloc_queues(adapter
)) {
4340 dev_err(&pdev
->dev
, "Unable to allocate memory for queues\n");
4344 /* e1000_power_up_phy(adapter); */
4347 wr32(E1000_WUS
, ~0);
4349 if (netif_running(netdev
)) {
4350 err
= igb_open(netdev
);
4355 netif_device_attach(netdev
);
4357 /* let the f/w know that the h/w is now under the control of the
4359 igb_get_hw_control(adapter
);
4365 static void igb_shutdown(struct pci_dev
*pdev
)
4367 igb_suspend(pdev
, PMSG_SUSPEND
);
4370 #ifdef CONFIG_NET_POLL_CONTROLLER
4372 * Polling 'interrupt' - used by things like netconsole to send skbs
4373 * without having to re-enable interrupts. It's not called while
4374 * the interrupt routine is executing.
4376 static void igb_netpoll(struct net_device
*netdev
)
4378 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4379 struct e1000_hw
*hw
= &adapter
->hw
;
4382 if (!adapter
->msix_entries
) {
4383 igb_irq_disable(adapter
);
4384 napi_schedule(&adapter
->rx_ring
[0].napi
);
4388 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
4389 struct igb_ring
*tx_ring
= &adapter
->tx_ring
[i
];
4390 wr32(E1000_EIMC
, tx_ring
->eims_value
);
4391 igb_clean_tx_irq(tx_ring
);
4392 wr32(E1000_EIMS
, tx_ring
->eims_value
);
4395 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
4396 struct igb_ring
*rx_ring
= &adapter
->rx_ring
[i
];
4397 wr32(E1000_EIMC
, rx_ring
->eims_value
);
4398 napi_schedule(&rx_ring
->napi
);
4401 #endif /* CONFIG_NET_POLL_CONTROLLER */
4404 * igb_io_error_detected - called when PCI error is detected
4405 * @pdev: Pointer to PCI device
4406 * @state: The current pci connection state
4408 * This function is called after a PCI bus error affecting
4409 * this device has been detected.
4411 static pci_ers_result_t
igb_io_error_detected(struct pci_dev
*pdev
,
4412 pci_channel_state_t state
)
4414 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4415 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4417 netif_device_detach(netdev
);
4419 if (netif_running(netdev
))
4421 pci_disable_device(pdev
);
4423 /* Request a slot slot reset. */
4424 return PCI_ERS_RESULT_NEED_RESET
;
4428 * igb_io_slot_reset - called after the pci bus has been reset.
4429 * @pdev: Pointer to PCI device
4431 * Restart the card from scratch, as if from a cold-boot. Implementation
4432 * resembles the first-half of the igb_resume routine.
4434 static pci_ers_result_t
igb_io_slot_reset(struct pci_dev
*pdev
)
4436 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4437 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4438 struct e1000_hw
*hw
= &adapter
->hw
;
4439 pci_ers_result_t result
;
4442 if (pci_enable_device_mem(pdev
)) {
4444 "Cannot re-enable PCI device after reset.\n");
4445 result
= PCI_ERS_RESULT_DISCONNECT
;
4447 pci_set_master(pdev
);
4448 pci_restore_state(pdev
);
4450 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4451 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4454 wr32(E1000_WUS
, ~0);
4455 result
= PCI_ERS_RESULT_RECOVERED
;
4458 err
= pci_cleanup_aer_uncorrect_error_status(pdev
);
4460 dev_err(&pdev
->dev
, "pci_cleanup_aer_uncorrect_error_status "
4461 "failed 0x%0x\n", err
);
4462 /* non-fatal, continue */
4469 * igb_io_resume - called when traffic can start flowing again.
4470 * @pdev: Pointer to PCI device
4472 * This callback is called when the error recovery driver tells us that
4473 * its OK to resume normal operation. Implementation resembles the
4474 * second-half of the igb_resume routine.
4476 static void igb_io_resume(struct pci_dev
*pdev
)
4478 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4479 struct igb_adapter
*adapter
= netdev_priv(netdev
);
4481 if (netif_running(netdev
)) {
4482 if (igb_up(adapter
)) {
4483 dev_err(&pdev
->dev
, "igb_up failed after reset\n");
4488 netif_device_attach(netdev
);
4490 /* let the f/w know that the h/w is now under the control of the
4492 igb_get_hw_control(adapter
);