1 /*******************************************************************************
4 Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2 of the License, or (at your option)
11 This program is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 You should have received a copy of the GNU General Public License along with
17 this program; if not, write to the Free Software Foundation, Inc., 59
18 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 The full GNU General Public License is included in this distribution in the
24 Linux NICS <linux.nics@intel.com>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
33 * - include fix to the condition that determines when to quit NAPI - Robert Olsson
34 * - use netif_poll_{disable/enable} to synchronize between NAPI and i/f up/down
36 * - reset buffer_info->dma in Tx resource cleanup logic
38 * - sparse cleanup - shemminger@osdl.org
39 * - fix tx resource cleanup logic
42 char ixgb_driver_name
[] = "ixgb";
43 char ixgb_driver_string
[] = "Intel(R) PRO/10GbE Network Driver";
45 #ifndef CONFIG_IXGB_NAPI
48 #define DRIVERNAPI "-NAPI"
51 #define DRV_VERSION "1.0.95-k2"DRIVERNAPI
52 char ixgb_driver_version
[] = DRV_VERSION
;
53 char ixgb_copyright
[] = "Copyright (c) 1999-2005 Intel Corporation.";
55 /* ixgb_pci_tbl - PCI Device ID Table
57 * Wildcard entries (PCI_ANY_ID) should come last
58 * Last entry must be all 0s
60 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
61 * Class, Class Mask, private data (not used) }
63 static struct pci_device_id ixgb_pci_tbl
[] = {
64 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX
,
65 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
66 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_SR
,
67 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
68 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_LR
,
69 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
71 /* required last entry */
75 MODULE_DEVICE_TABLE(pci
, ixgb_pci_tbl
);
77 /* Local Function Prototypes */
79 int ixgb_up(struct ixgb_adapter
*adapter
);
80 void ixgb_down(struct ixgb_adapter
*adapter
, boolean_t kill_watchdog
);
81 void ixgb_reset(struct ixgb_adapter
*adapter
);
82 int ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
);
83 int ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
);
84 void ixgb_free_tx_resources(struct ixgb_adapter
*adapter
);
85 void ixgb_free_rx_resources(struct ixgb_adapter
*adapter
);
86 void ixgb_update_stats(struct ixgb_adapter
*adapter
);
88 static int ixgb_init_module(void);
89 static void ixgb_exit_module(void);
90 static int ixgb_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
91 static void __devexit
ixgb_remove(struct pci_dev
*pdev
);
92 static int ixgb_sw_init(struct ixgb_adapter
*adapter
);
93 static int ixgb_open(struct net_device
*netdev
);
94 static int ixgb_close(struct net_device
*netdev
);
95 static void ixgb_configure_tx(struct ixgb_adapter
*adapter
);
96 static void ixgb_configure_rx(struct ixgb_adapter
*adapter
);
97 static void ixgb_setup_rctl(struct ixgb_adapter
*adapter
);
98 static void ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
);
99 static void ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
);
100 static void ixgb_set_multi(struct net_device
*netdev
);
101 static void ixgb_watchdog(unsigned long data
);
102 static int ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
);
103 static struct net_device_stats
*ixgb_get_stats(struct net_device
*netdev
);
104 static int ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
);
105 static int ixgb_set_mac(struct net_device
*netdev
, void *p
);
106 static irqreturn_t
ixgb_intr(int irq
, void *data
, struct pt_regs
*regs
);
107 static boolean_t
ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
);
109 #ifdef CONFIG_IXGB_NAPI
110 static int ixgb_clean(struct net_device
*netdev
, int *budget
);
111 static boolean_t
ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
,
112 int *work_done
, int work_to_do
);
114 static boolean_t
ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
);
116 static void ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
);
117 void ixgb_set_ethtool_ops(struct net_device
*netdev
);
118 static void ixgb_tx_timeout(struct net_device
*dev
);
119 static void ixgb_tx_timeout_task(struct net_device
*dev
);
120 static void ixgb_vlan_rx_register(struct net_device
*netdev
,
121 struct vlan_group
*grp
);
122 static void ixgb_vlan_rx_add_vid(struct net_device
*netdev
, uint16_t vid
);
123 static void ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, uint16_t vid
);
124 static void ixgb_restore_vlan(struct ixgb_adapter
*adapter
);
126 #ifdef CONFIG_NET_POLL_CONTROLLER
127 /* for netdump / net console */
128 static void ixgb_netpoll(struct net_device
*dev
);
131 /* Exported from other modules */
133 extern void ixgb_check_options(struct ixgb_adapter
*adapter
);
135 static struct pci_driver ixgb_driver
= {
136 .name
= ixgb_driver_name
,
137 .id_table
= ixgb_pci_tbl
,
139 .remove
= __devexit_p(ixgb_remove
),
142 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
143 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
144 MODULE_LICENSE("GPL");
145 MODULE_VERSION(DRV_VERSION
);
147 /* some defines for controlling descriptor fetches in h/w */
148 #define RXDCTL_PTHRESH_DEFAULT 128 /* chip considers prefech below this */
149 #define RXDCTL_HTHRESH_DEFAULT 16 /* chip will only prefetch if tail is
150 pushed this many descriptors from head */
151 #define RXDCTL_WTHRESH_DEFAULT 16 /* chip writes back at this many or RXT0 */
154 * ixgb_init_module - Driver Registration Routine
156 * ixgb_init_module is the first routine called when the driver is
157 * loaded. All it does is register with the PCI subsystem.
161 ixgb_init_module(void)
163 printk(KERN_INFO
"%s - version %s\n",
164 ixgb_driver_string
, ixgb_driver_version
);
166 printk(KERN_INFO
"%s\n", ixgb_copyright
);
168 return pci_module_init(&ixgb_driver
);
171 module_init(ixgb_init_module
);
174 * ixgb_exit_module - Driver Exit Cleanup Routine
176 * ixgb_exit_module is called just before the driver is removed
181 ixgb_exit_module(void)
183 pci_unregister_driver(&ixgb_driver
);
186 module_exit(ixgb_exit_module
);
189 * ixgb_irq_disable - Mask off interrupt generation on the NIC
190 * @adapter: board private structure
194 ixgb_irq_disable(struct ixgb_adapter
*adapter
)
196 atomic_inc(&adapter
->irq_sem
);
197 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
198 IXGB_WRITE_FLUSH(&adapter
->hw
);
199 synchronize_irq(adapter
->pdev
->irq
);
203 * ixgb_irq_enable - Enable default interrupt generation settings
204 * @adapter: board private structure
208 ixgb_irq_enable(struct ixgb_adapter
*adapter
)
210 if(atomic_dec_and_test(&adapter
->irq_sem
)) {
211 IXGB_WRITE_REG(&adapter
->hw
, IMS
,
212 IXGB_INT_RXT0
| IXGB_INT_RXDMT0
| IXGB_INT_TXDW
|
214 IXGB_WRITE_FLUSH(&adapter
->hw
);
219 ixgb_up(struct ixgb_adapter
*adapter
)
221 struct net_device
*netdev
= adapter
->netdev
;
223 int max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
224 struct ixgb_hw
*hw
= &adapter
->hw
;
226 /* hardware has been reset, we need to reload some things */
228 ixgb_set_multi(netdev
);
230 ixgb_restore_vlan(adapter
);
232 ixgb_configure_tx(adapter
);
233 ixgb_setup_rctl(adapter
);
234 ixgb_configure_rx(adapter
);
235 ixgb_alloc_rx_buffers(adapter
);
237 #ifdef CONFIG_PCI_MSI
239 boolean_t pcix
= (IXGB_READ_REG(&adapter
->hw
, STATUS
) &
240 IXGB_STATUS_PCIX_MODE
) ? TRUE
: FALSE
;
241 adapter
->have_msi
= TRUE
;
244 adapter
->have_msi
= FALSE
;
245 else if((err
= pci_enable_msi(adapter
->pdev
))) {
247 "Unable to allocate MSI interrupt Error: %d\n", err
);
248 adapter
->have_msi
= FALSE
;
249 /* proceed to try to request regular interrupt */
254 if((err
= request_irq(adapter
->pdev
->irq
, &ixgb_intr
,
255 SA_SHIRQ
| SA_SAMPLE_RANDOM
,
256 netdev
->name
, netdev
)))
259 /* disable interrupts and get the hardware into a known state */
260 IXGB_WRITE_REG(&adapter
->hw
, IMC
, 0xffffffff);
262 if((hw
->max_frame_size
!= max_frame
) ||
263 (hw
->max_frame_size
!=
264 (IXGB_READ_REG(hw
, MFS
) >> IXGB_MFS_SHIFT
))) {
266 hw
->max_frame_size
= max_frame
;
268 IXGB_WRITE_REG(hw
, MFS
, hw
->max_frame_size
<< IXGB_MFS_SHIFT
);
270 if(hw
->max_frame_size
>
271 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
) {
272 uint32_t ctrl0
= IXGB_READ_REG(hw
, CTRL0
);
274 if(!(ctrl0
& IXGB_CTRL0_JFE
)) {
275 ctrl0
|= IXGB_CTRL0_JFE
;
276 IXGB_WRITE_REG(hw
, CTRL0
, ctrl0
);
281 mod_timer(&adapter
->watchdog_timer
, jiffies
);
282 ixgb_irq_enable(adapter
);
284 #ifdef CONFIG_IXGB_NAPI
285 netif_poll_enable(netdev
);
291 ixgb_down(struct ixgb_adapter
*adapter
, boolean_t kill_watchdog
)
293 struct net_device
*netdev
= adapter
->netdev
;
295 ixgb_irq_disable(adapter
);
296 free_irq(adapter
->pdev
->irq
, netdev
);
297 #ifdef CONFIG_PCI_MSI
298 if(adapter
->have_msi
== TRUE
)
299 pci_disable_msi(adapter
->pdev
);
303 del_timer_sync(&adapter
->watchdog_timer
);
304 #ifdef CONFIG_IXGB_NAPI
305 netif_poll_disable(netdev
);
307 adapter
->link_speed
= 0;
308 adapter
->link_duplex
= 0;
309 netif_carrier_off(netdev
);
310 netif_stop_queue(netdev
);
313 ixgb_clean_tx_ring(adapter
);
314 ixgb_clean_rx_ring(adapter
);
318 ixgb_reset(struct ixgb_adapter
*adapter
)
321 ixgb_adapter_stop(&adapter
->hw
);
322 if(!ixgb_init_hw(&adapter
->hw
))
323 IXGB_DBG("ixgb_init_hw failed.\n");
327 * ixgb_probe - Device Initialization Routine
328 * @pdev: PCI device information struct
329 * @ent: entry in ixgb_pci_tbl
331 * Returns 0 on success, negative on failure
333 * ixgb_probe initializes an adapter identified by a pci_dev structure.
334 * The OS initialization, configuring of the adapter private structure,
335 * and a hardware reset occur.
339 ixgb_probe(struct pci_dev
*pdev
,
340 const struct pci_device_id
*ent
)
342 struct net_device
*netdev
= NULL
;
343 struct ixgb_adapter
*adapter
;
344 static int cards_found
= 0;
345 unsigned long mmio_start
;
351 if((err
= pci_enable_device(pdev
)))
354 if(!(err
= pci_set_dma_mask(pdev
, DMA_64BIT_MASK
))) {
357 if((err
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
))) {
358 IXGB_ERR("No usable DMA configuration, aborting\n");
364 if((err
= pci_request_regions(pdev
, ixgb_driver_name
)))
367 pci_set_master(pdev
);
369 netdev
= alloc_etherdev(sizeof(struct ixgb_adapter
));
372 goto err_alloc_etherdev
;
375 SET_MODULE_OWNER(netdev
);
376 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
378 pci_set_drvdata(pdev
, netdev
);
379 adapter
= netdev
->priv
;
380 adapter
->netdev
= netdev
;
381 adapter
->pdev
= pdev
;
382 adapter
->hw
.back
= adapter
;
384 mmio_start
= pci_resource_start(pdev
, BAR_0
);
385 mmio_len
= pci_resource_len(pdev
, BAR_0
);
387 adapter
->hw
.hw_addr
= ioremap(mmio_start
, mmio_len
);
388 if(!adapter
->hw
.hw_addr
) {
393 for(i
= BAR_1
; i
<= BAR_5
; i
++) {
394 if(pci_resource_len(pdev
, i
) == 0)
396 if(pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
397 adapter
->hw
.io_base
= pci_resource_start(pdev
, i
);
402 netdev
->open
= &ixgb_open
;
403 netdev
->stop
= &ixgb_close
;
404 netdev
->hard_start_xmit
= &ixgb_xmit_frame
;
405 netdev
->get_stats
= &ixgb_get_stats
;
406 netdev
->set_multicast_list
= &ixgb_set_multi
;
407 netdev
->set_mac_address
= &ixgb_set_mac
;
408 netdev
->change_mtu
= &ixgb_change_mtu
;
409 ixgb_set_ethtool_ops(netdev
);
410 netdev
->tx_timeout
= &ixgb_tx_timeout
;
411 netdev
->watchdog_timeo
= HZ
;
412 #ifdef CONFIG_IXGB_NAPI
413 netdev
->poll
= &ixgb_clean
;
416 netdev
->vlan_rx_register
= ixgb_vlan_rx_register
;
417 netdev
->vlan_rx_add_vid
= ixgb_vlan_rx_add_vid
;
418 netdev
->vlan_rx_kill_vid
= ixgb_vlan_rx_kill_vid
;
419 #ifdef CONFIG_NET_POLL_CONTROLLER
420 netdev
->poll_controller
= ixgb_netpoll
;
423 netdev
->mem_start
= mmio_start
;
424 netdev
->mem_end
= mmio_start
+ mmio_len
;
425 netdev
->base_addr
= adapter
->hw
.io_base
;
427 adapter
->bd_number
= cards_found
;
428 adapter
->link_speed
= 0;
429 adapter
->link_duplex
= 0;
431 /* setup the private structure */
433 if((err
= ixgb_sw_init(adapter
)))
436 netdev
->features
= NETIF_F_SG
|
440 NETIF_F_HW_VLAN_FILTER
;
442 netdev
->features
|= NETIF_F_TSO
;
446 netdev
->features
|= NETIF_F_HIGHDMA
;
448 /* make sure the EEPROM is good */
450 if(!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
451 printk(KERN_ERR
"The EEPROM Checksum Is Not Valid\n");
456 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
458 if(!is_valid_ether_addr(netdev
->dev_addr
)) {
463 adapter
->part_num
= ixgb_get_ee_pba_number(&adapter
->hw
);
465 init_timer(&adapter
->watchdog_timer
);
466 adapter
->watchdog_timer
.function
= &ixgb_watchdog
;
467 adapter
->watchdog_timer
.data
= (unsigned long)adapter
;
469 INIT_WORK(&adapter
->tx_timeout_task
,
470 (void (*)(void *))ixgb_tx_timeout_task
, netdev
);
472 if((err
= register_netdev(netdev
)))
475 /* we're going to reset, so assume we have no link for now */
477 netif_carrier_off(netdev
);
478 netif_stop_queue(netdev
);
480 printk(KERN_INFO
"%s: Intel(R) PRO/10GbE Network Connection\n",
482 ixgb_check_options(adapter
);
483 /* reset the hardware with the new settings */
493 iounmap(adapter
->hw
.hw_addr
);
497 pci_release_regions(pdev
);
502 * ixgb_remove - Device Removal Routine
503 * @pdev: PCI device information struct
505 * ixgb_remove is called by the PCI subsystem to alert the driver
506 * that it should release a PCI device. The could be caused by a
507 * Hot-Plug event, or because the driver is going to be removed from
511 static void __devexit
512 ixgb_remove(struct pci_dev
*pdev
)
514 struct net_device
*netdev
= pci_get_drvdata(pdev
);
515 struct ixgb_adapter
*adapter
= netdev
->priv
;
517 unregister_netdev(netdev
);
519 iounmap(adapter
->hw
.hw_addr
);
520 pci_release_regions(pdev
);
526 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
527 * @adapter: board private structure to initialize
529 * ixgb_sw_init initializes the Adapter private data structure.
530 * Fields are initialized based on PCI device information and
531 * OS network device settings (MTU size).
535 ixgb_sw_init(struct ixgb_adapter
*adapter
)
537 struct ixgb_hw
*hw
= &adapter
->hw
;
538 struct net_device
*netdev
= adapter
->netdev
;
539 struct pci_dev
*pdev
= adapter
->pdev
;
541 /* PCI config space info */
543 hw
->vendor_id
= pdev
->vendor
;
544 hw
->device_id
= pdev
->device
;
545 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
546 hw
->subsystem_id
= pdev
->subsystem_device
;
548 adapter
->rx_buffer_len
= IXGB_RXBUFFER_2048
;
550 hw
->max_frame_size
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
552 if((hw
->device_id
== IXGB_DEVICE_ID_82597EX
)
553 ||(hw
->device_id
== IXGB_DEVICE_ID_82597EX_LR
)
554 ||(hw
->device_id
== IXGB_DEVICE_ID_82597EX_SR
))
555 hw
->mac_type
= ixgb_82597
;
557 /* should never have loaded on this device */
558 printk(KERN_ERR
"ixgb: unsupported device id\n");
561 /* enable flow control to be programmed */
564 atomic_set(&adapter
->irq_sem
, 1);
565 spin_lock_init(&adapter
->tx_lock
);
571 * ixgb_open - Called when a network interface is made active
572 * @netdev: network interface device structure
574 * Returns 0 on success, negative value on failure
576 * The open entry point is called when a network interface is made
577 * active by the system (IFF_UP). At this point all resources needed
578 * for transmit and receive operations are allocated, the interrupt
579 * handler is registered with the OS, the watchdog timer is started,
580 * and the stack is notified that the interface is ready.
584 ixgb_open(struct net_device
*netdev
)
586 struct ixgb_adapter
*adapter
= netdev
->priv
;
589 /* allocate transmit descriptors */
591 if((err
= ixgb_setup_tx_resources(adapter
)))
594 /* allocate receive descriptors */
596 if((err
= ixgb_setup_rx_resources(adapter
)))
599 if((err
= ixgb_up(adapter
)))
605 ixgb_free_rx_resources(adapter
);
607 ixgb_free_tx_resources(adapter
);
615 * ixgb_close - Disables a network interface
616 * @netdev: network interface device structure
618 * Returns 0, this is not allowed to fail
620 * The close entry point is called when an interface is de-activated
621 * by the OS. The hardware is still under the drivers control, but
622 * needs to be disabled. A global MAC reset is issued to stop the
623 * hardware, and all transmit and receive resources are freed.
627 ixgb_close(struct net_device
*netdev
)
629 struct ixgb_adapter
*adapter
= netdev
->priv
;
631 ixgb_down(adapter
, TRUE
);
633 ixgb_free_tx_resources(adapter
);
634 ixgb_free_rx_resources(adapter
);
640 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
641 * @adapter: board private structure
643 * Return 0 on success, negative on failure
647 ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
)
649 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
650 struct pci_dev
*pdev
= adapter
->pdev
;
653 size
= sizeof(struct ixgb_buffer
) * txdr
->count
;
654 txdr
->buffer_info
= vmalloc(size
);
655 if(!txdr
->buffer_info
) {
658 memset(txdr
->buffer_info
, 0, size
);
660 /* round up to nearest 4K */
662 txdr
->size
= txdr
->count
* sizeof(struct ixgb_tx_desc
);
663 IXGB_ROUNDUP(txdr
->size
, 4096);
665 txdr
->desc
= pci_alloc_consistent(pdev
, txdr
->size
, &txdr
->dma
);
667 vfree(txdr
->buffer_info
);
670 memset(txdr
->desc
, 0, txdr
->size
);
672 txdr
->next_to_use
= 0;
673 txdr
->next_to_clean
= 0;
679 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
680 * @adapter: board private structure
682 * Configure the Tx unit of the MAC after a reset.
686 ixgb_configure_tx(struct ixgb_adapter
*adapter
)
688 uint64_t tdba
= adapter
->tx_ring
.dma
;
689 uint32_t tdlen
= adapter
->tx_ring
.count
* sizeof(struct ixgb_tx_desc
);
691 struct ixgb_hw
*hw
= &adapter
->hw
;
693 /* Setup the Base and Length of the Tx Descriptor Ring
694 * tx_ring.dma can be either a 32 or 64 bit value
697 IXGB_WRITE_REG(hw
, TDBAL
, (tdba
& 0x00000000ffffffffULL
));
698 IXGB_WRITE_REG(hw
, TDBAH
, (tdba
>> 32));
700 IXGB_WRITE_REG(hw
, TDLEN
, tdlen
);
702 /* Setup the HW Tx Head and Tail descriptor pointers */
704 IXGB_WRITE_REG(hw
, TDH
, 0);
705 IXGB_WRITE_REG(hw
, TDT
, 0);
707 /* don't set up txdctl, it induces performance problems if configured
709 /* Set the Tx Interrupt Delay register */
711 IXGB_WRITE_REG(hw
, TIDV
, adapter
->tx_int_delay
);
713 /* Program the Transmit Control Register */
715 tctl
= IXGB_TCTL_TCE
| IXGB_TCTL_TXEN
| IXGB_TCTL_TPDE
;
716 IXGB_WRITE_REG(hw
, TCTL
, tctl
);
718 /* Setup Transmit Descriptor Settings for this adapter */
719 adapter
->tx_cmd_type
=
721 | (adapter
->tx_int_delay_enable
? IXGB_TX_DESC_CMD_IDE
: 0);
725 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
726 * @adapter: board private structure
728 * Returns 0 on success, negative on failure
732 ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
)
734 struct ixgb_desc_ring
*rxdr
= &adapter
->rx_ring
;
735 struct pci_dev
*pdev
= adapter
->pdev
;
738 size
= sizeof(struct ixgb_buffer
) * rxdr
->count
;
739 rxdr
->buffer_info
= vmalloc(size
);
740 if(!rxdr
->buffer_info
) {
743 memset(rxdr
->buffer_info
, 0, size
);
745 /* Round up to nearest 4K */
747 rxdr
->size
= rxdr
->count
* sizeof(struct ixgb_rx_desc
);
748 IXGB_ROUNDUP(rxdr
->size
, 4096);
750 rxdr
->desc
= pci_alloc_consistent(pdev
, rxdr
->size
, &rxdr
->dma
);
753 vfree(rxdr
->buffer_info
);
756 memset(rxdr
->desc
, 0, rxdr
->size
);
758 rxdr
->next_to_clean
= 0;
759 rxdr
->next_to_use
= 0;
765 * ixgb_setup_rctl - configure the receive control register
766 * @adapter: Board private structure
770 ixgb_setup_rctl(struct ixgb_adapter
*adapter
)
774 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
776 rctl
&= ~(3 << IXGB_RCTL_MO_SHIFT
);
779 IXGB_RCTL_BAM
| IXGB_RCTL_RDMTS_1_2
|
780 IXGB_RCTL_RXEN
| IXGB_RCTL_CFF
|
781 (adapter
->hw
.mc_filter_type
<< IXGB_RCTL_MO_SHIFT
);
783 rctl
|= IXGB_RCTL_SECRC
;
785 switch (adapter
->rx_buffer_len
) {
786 case IXGB_RXBUFFER_2048
:
788 rctl
|= IXGB_RCTL_BSIZE_2048
;
790 case IXGB_RXBUFFER_4096
:
791 rctl
|= IXGB_RCTL_BSIZE_4096
;
793 case IXGB_RXBUFFER_8192
:
794 rctl
|= IXGB_RCTL_BSIZE_8192
;
796 case IXGB_RXBUFFER_16384
:
797 rctl
|= IXGB_RCTL_BSIZE_16384
;
801 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
805 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
806 * @adapter: board private structure
808 * Configure the Rx unit of the MAC after a reset.
812 ixgb_configure_rx(struct ixgb_adapter
*adapter
)
814 uint64_t rdba
= adapter
->rx_ring
.dma
;
815 uint32_t rdlen
= adapter
->rx_ring
.count
* sizeof(struct ixgb_rx_desc
);
816 struct ixgb_hw
*hw
= &adapter
->hw
;
821 /* make sure receives are disabled while setting up the descriptors */
823 rctl
= IXGB_READ_REG(hw
, RCTL
);
824 IXGB_WRITE_REG(hw
, RCTL
, rctl
& ~IXGB_RCTL_RXEN
);
826 /* set the Receive Delay Timer Register */
828 IXGB_WRITE_REG(hw
, RDTR
, adapter
->rx_int_delay
);
830 /* Setup the Base and Length of the Rx Descriptor Ring */
832 IXGB_WRITE_REG(hw
, RDBAL
, (rdba
& 0x00000000ffffffffULL
));
833 IXGB_WRITE_REG(hw
, RDBAH
, (rdba
>> 32));
835 IXGB_WRITE_REG(hw
, RDLEN
, rdlen
);
837 /* Setup the HW Rx Head and Tail Descriptor Pointers */
838 IXGB_WRITE_REG(hw
, RDH
, 0);
839 IXGB_WRITE_REG(hw
, RDT
, 0);
841 /* set up pre-fetching of receive buffers so we get some before we
842 * run out (default hardware behavior is to run out before fetching
843 * more). This sets up to fetch if HTHRESH rx descriptors are avail
844 * and the descriptors in hw cache are below PTHRESH. This avoids
845 * the hardware behavior of fetching <=512 descriptors in a single
846 * burst that pre-empts all other activity, usually causing fifo
848 /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
849 rxdctl
= RXDCTL_WTHRESH_DEFAULT
<< IXGB_RXDCTL_WTHRESH_SHIFT
|
850 RXDCTL_HTHRESH_DEFAULT
<< IXGB_RXDCTL_HTHRESH_SHIFT
|
851 RXDCTL_PTHRESH_DEFAULT
<< IXGB_RXDCTL_PTHRESH_SHIFT
;
852 IXGB_WRITE_REG(hw
, RXDCTL
, rxdctl
);
854 /* Enable Receive Checksum Offload for TCP and UDP */
855 if(adapter
->rx_csum
== TRUE
) {
856 rxcsum
= IXGB_READ_REG(hw
, RXCSUM
);
857 rxcsum
|= IXGB_RXCSUM_TUOFL
;
858 IXGB_WRITE_REG(hw
, RXCSUM
, rxcsum
);
861 /* Enable Receives */
863 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
867 * ixgb_free_tx_resources - Free Tx Resources
868 * @adapter: board private structure
870 * Free all transmit software resources
874 ixgb_free_tx_resources(struct ixgb_adapter
*adapter
)
876 struct pci_dev
*pdev
= adapter
->pdev
;
878 ixgb_clean_tx_ring(adapter
);
880 vfree(adapter
->tx_ring
.buffer_info
);
881 adapter
->tx_ring
.buffer_info
= NULL
;
883 pci_free_consistent(pdev
, adapter
->tx_ring
.size
,
884 adapter
->tx_ring
.desc
, adapter
->tx_ring
.dma
);
886 adapter
->tx_ring
.desc
= NULL
;
890 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter
*adapter
,
891 struct ixgb_buffer
*buffer_info
)
893 struct pci_dev
*pdev
= adapter
->pdev
;
894 if(buffer_info
->dma
) {
899 buffer_info
->dma
= 0;
901 if(buffer_info
->skb
) {
902 dev_kfree_skb_any(buffer_info
->skb
);
903 buffer_info
->skb
= NULL
;
908 * ixgb_clean_tx_ring - Free Tx Buffers
909 * @adapter: board private structure
913 ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
)
915 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
916 struct ixgb_buffer
*buffer_info
;
920 /* Free all the Tx ring sk_buffs */
922 for(i
= 0; i
< tx_ring
->count
; i
++) {
923 buffer_info
= &tx_ring
->buffer_info
[i
];
924 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
927 size
= sizeof(struct ixgb_buffer
) * tx_ring
->count
;
928 memset(tx_ring
->buffer_info
, 0, size
);
930 /* Zero out the descriptor ring */
932 memset(tx_ring
->desc
, 0, tx_ring
->size
);
934 tx_ring
->next_to_use
= 0;
935 tx_ring
->next_to_clean
= 0;
937 IXGB_WRITE_REG(&adapter
->hw
, TDH
, 0);
938 IXGB_WRITE_REG(&adapter
->hw
, TDT
, 0);
942 * ixgb_free_rx_resources - Free Rx Resources
943 * @adapter: board private structure
945 * Free all receive software resources
949 ixgb_free_rx_resources(struct ixgb_adapter
*adapter
)
951 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
952 struct pci_dev
*pdev
= adapter
->pdev
;
954 ixgb_clean_rx_ring(adapter
);
956 vfree(rx_ring
->buffer_info
);
957 rx_ring
->buffer_info
= NULL
;
959 pci_free_consistent(pdev
, rx_ring
->size
, rx_ring
->desc
, rx_ring
->dma
);
961 rx_ring
->desc
= NULL
;
965 * ixgb_clean_rx_ring - Free Rx Buffers
966 * @adapter: board private structure
970 ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
)
972 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
973 struct ixgb_buffer
*buffer_info
;
974 struct pci_dev
*pdev
= adapter
->pdev
;
978 /* Free all the Rx ring sk_buffs */
980 for(i
= 0; i
< rx_ring
->count
; i
++) {
981 buffer_info
= &rx_ring
->buffer_info
[i
];
982 if(buffer_info
->skb
) {
984 pci_unmap_single(pdev
,
989 dev_kfree_skb(buffer_info
->skb
);
991 buffer_info
->skb
= NULL
;
995 size
= sizeof(struct ixgb_buffer
) * rx_ring
->count
;
996 memset(rx_ring
->buffer_info
, 0, size
);
998 /* Zero out the descriptor ring */
1000 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1002 rx_ring
->next_to_clean
= 0;
1003 rx_ring
->next_to_use
= 0;
1005 IXGB_WRITE_REG(&adapter
->hw
, RDH
, 0);
1006 IXGB_WRITE_REG(&adapter
->hw
, RDT
, 0);
1010 * ixgb_set_mac - Change the Ethernet Address of the NIC
1011 * @netdev: network interface device structure
1012 * @p: pointer to an address structure
1014 * Returns 0 on success, negative on failure
1018 ixgb_set_mac(struct net_device
*netdev
, void *p
)
1020 struct ixgb_adapter
*adapter
= netdev
->priv
;
1021 struct sockaddr
*addr
= p
;
1023 if(!is_valid_ether_addr(addr
->sa_data
))
1024 return -EADDRNOTAVAIL
;
1026 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1028 ixgb_rar_set(&adapter
->hw
, addr
->sa_data
, 0);
1034 * ixgb_set_multi - Multicast and Promiscuous mode set
1035 * @netdev: network interface device structure
1037 * The set_multi entry point is called whenever the multicast address
1038 * list or the network interface flags are updated. This routine is
1039 * responsible for configuring the hardware for proper multicast,
1040 * promiscuous mode, and all-multi behavior.
1044 ixgb_set_multi(struct net_device
*netdev
)
1046 struct ixgb_adapter
*adapter
= netdev
->priv
;
1047 struct ixgb_hw
*hw
= &adapter
->hw
;
1048 struct dev_mc_list
*mc_ptr
;
1052 /* Check for Promiscuous and All Multicast modes */
1054 rctl
= IXGB_READ_REG(hw
, RCTL
);
1056 if(netdev
->flags
& IFF_PROMISC
) {
1057 rctl
|= (IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1058 } else if(netdev
->flags
& IFF_ALLMULTI
) {
1059 rctl
|= IXGB_RCTL_MPE
;
1060 rctl
&= ~IXGB_RCTL_UPE
;
1062 rctl
&= ~(IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1065 if(netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
) {
1066 rctl
|= IXGB_RCTL_MPE
;
1067 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1069 uint8_t mta
[netdev
->mc_count
* IXGB_ETH_LENGTH_OF_ADDRESS
];
1071 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1073 for(i
= 0, mc_ptr
= netdev
->mc_list
; mc_ptr
;
1074 i
++, mc_ptr
= mc_ptr
->next
)
1075 memcpy(&mta
[i
* IXGB_ETH_LENGTH_OF_ADDRESS
],
1076 mc_ptr
->dmi_addr
, IXGB_ETH_LENGTH_OF_ADDRESS
);
1078 ixgb_mc_addr_list_update(hw
, mta
, netdev
->mc_count
, 0);
1083 * ixgb_watchdog - Timer Call-back
1084 * @data: pointer to netdev cast into an unsigned long
1088 ixgb_watchdog(unsigned long data
)
1090 struct ixgb_adapter
*adapter
= (struct ixgb_adapter
*)data
;
1091 struct net_device
*netdev
= adapter
->netdev
;
1092 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
1094 ixgb_check_for_link(&adapter
->hw
);
1096 if (ixgb_check_for_bad_link(&adapter
->hw
)) {
1097 /* force the reset path */
1098 netif_stop_queue(netdev
);
1101 if(adapter
->hw
.link_up
) {
1102 if(!netif_carrier_ok(netdev
)) {
1103 printk(KERN_INFO
"ixgb: %s NIC Link is Up %d Mbps %s\n",
1104 netdev
->name
, 10000, "Full Duplex");
1105 adapter
->link_speed
= 10000;
1106 adapter
->link_duplex
= FULL_DUPLEX
;
1107 netif_carrier_on(netdev
);
1108 netif_wake_queue(netdev
);
1111 if(netif_carrier_ok(netdev
)) {
1112 adapter
->link_speed
= 0;
1113 adapter
->link_duplex
= 0;
1115 "ixgb: %s NIC Link is Down\n",
1117 netif_carrier_off(netdev
);
1118 netif_stop_queue(netdev
);
1123 ixgb_update_stats(adapter
);
1125 if(!netif_carrier_ok(netdev
)) {
1126 if(IXGB_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
1127 /* We've lost link, so the controller stops DMA,
1128 * but we've got queued Tx work that's never going
1129 * to get done, so reset controller to flush Tx.
1130 * (Do the reset outside of interrupt context). */
1131 schedule_work(&adapter
->tx_timeout_task
);
1135 /* Force detection of hung controller every watchdog period */
1136 adapter
->detect_tx_hung
= TRUE
;
1138 /* generate an interrupt to force clean up of any stragglers */
1139 IXGB_WRITE_REG(&adapter
->hw
, ICS
, IXGB_INT_TXDW
);
1141 /* Reset the timer */
1142 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 2 * HZ
);
1145 #define IXGB_TX_FLAGS_CSUM 0x00000001
1146 #define IXGB_TX_FLAGS_VLAN 0x00000002
1147 #define IXGB_TX_FLAGS_TSO 0x00000004
1150 ixgb_tso(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1153 struct ixgb_context_desc
*context_desc
;
1155 uint8_t ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
1156 uint16_t ipcse
, tucse
, mss
;
1159 if(likely(skb_shinfo(skb
)->tso_size
)) {
1160 if (skb_header_cloned(skb
)) {
1161 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
1166 hdr_len
= ((skb
->h
.raw
- skb
->data
) + (skb
->h
.th
->doff
<< 2));
1167 mss
= skb_shinfo(skb
)->tso_size
;
1168 skb
->nh
.iph
->tot_len
= 0;
1169 skb
->nh
.iph
->check
= 0;
1170 skb
->h
.th
->check
= ~csum_tcpudp_magic(skb
->nh
.iph
->saddr
,
1173 ipcss
= skb
->nh
.raw
- skb
->data
;
1174 ipcso
= (void *)&(skb
->nh
.iph
->check
) - (void *)skb
->data
;
1175 ipcse
= skb
->h
.raw
- skb
->data
- 1;
1176 tucss
= skb
->h
.raw
- skb
->data
;
1177 tucso
= (void *)&(skb
->h
.th
->check
) - (void *)skb
->data
;
1180 i
= adapter
->tx_ring
.next_to_use
;
1181 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1183 context_desc
->ipcss
= ipcss
;
1184 context_desc
->ipcso
= ipcso
;
1185 context_desc
->ipcse
= cpu_to_le16(ipcse
);
1186 context_desc
->tucss
= tucss
;
1187 context_desc
->tucso
= tucso
;
1188 context_desc
->tucse
= cpu_to_le16(tucse
);
1189 context_desc
->mss
= cpu_to_le16(mss
);
1190 context_desc
->hdr_len
= hdr_len
;
1191 context_desc
->status
= 0;
1192 context_desc
->cmd_type_len
= cpu_to_le32(
1193 IXGB_CONTEXT_DESC_TYPE
1194 | IXGB_CONTEXT_DESC_CMD_TSE
1195 | IXGB_CONTEXT_DESC_CMD_IP
1196 | IXGB_CONTEXT_DESC_CMD_TCP
1197 | IXGB_CONTEXT_DESC_CMD_IDE
1198 | (skb
->len
- (hdr_len
)));
1201 if(++i
== adapter
->tx_ring
.count
) i
= 0;
1202 adapter
->tx_ring
.next_to_use
= i
;
1211 static inline boolean_t
1212 ixgb_tx_csum(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1214 struct ixgb_context_desc
*context_desc
;
1218 if(likely(skb
->ip_summed
== CHECKSUM_HW
)) {
1219 css
= skb
->h
.raw
- skb
->data
;
1220 cso
= (skb
->h
.raw
+ skb
->csum
) - skb
->data
;
1222 i
= adapter
->tx_ring
.next_to_use
;
1223 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1225 context_desc
->tucss
= css
;
1226 context_desc
->tucso
= cso
;
1227 context_desc
->tucse
= 0;
1228 /* zero out any previously existing data in one instruction */
1229 *(uint32_t *)&(context_desc
->ipcss
) = 0;
1230 context_desc
->status
= 0;
1231 context_desc
->hdr_len
= 0;
1232 context_desc
->mss
= 0;
1233 context_desc
->cmd_type_len
=
1234 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1235 | IXGB_TX_DESC_CMD_IDE
);
1237 if(++i
== adapter
->tx_ring
.count
) i
= 0;
1238 adapter
->tx_ring
.next_to_use
= i
;
1246 #define IXGB_MAX_TXD_PWR 14
1247 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1250 ixgb_tx_map(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
,
1253 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1254 struct ixgb_buffer
*buffer_info
;
1256 unsigned int offset
= 0, size
, count
= 0, i
;
1258 unsigned int nr_frags
= skb_shinfo(skb
)->nr_frags
;
1261 len
-= skb
->data_len
;
1263 i
= tx_ring
->next_to_use
;
1266 buffer_info
= &tx_ring
->buffer_info
[i
];
1267 size
= min(len
, IXGB_MAX_JUMBO_FRAME_SIZE
);
1268 buffer_info
->length
= size
;
1270 pci_map_single(adapter
->pdev
,
1274 buffer_info
->time_stamp
= jiffies
;
1279 if(++i
== tx_ring
->count
) i
= 0;
1282 for(f
= 0; f
< nr_frags
; f
++) {
1283 struct skb_frag_struct
*frag
;
1285 frag
= &skb_shinfo(skb
)->frags
[f
];
1290 buffer_info
= &tx_ring
->buffer_info
[i
];
1291 size
= min(len
, IXGB_MAX_JUMBO_FRAME_SIZE
);
1292 buffer_info
->length
= size
;
1294 pci_map_page(adapter
->pdev
,
1296 frag
->page_offset
+ offset
,
1299 buffer_info
->time_stamp
= jiffies
;
1304 if(++i
== tx_ring
->count
) i
= 0;
1307 i
= (i
== 0) ? tx_ring
->count
- 1 : i
- 1;
1308 tx_ring
->buffer_info
[i
].skb
= skb
;
1309 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
1315 ixgb_tx_queue(struct ixgb_adapter
*adapter
, int count
, int vlan_id
,int tx_flags
)
1317 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1318 struct ixgb_tx_desc
*tx_desc
= NULL
;
1319 struct ixgb_buffer
*buffer_info
;
1320 uint32_t cmd_type_len
= adapter
->tx_cmd_type
;
1325 if(tx_flags
& IXGB_TX_FLAGS_TSO
) {
1326 cmd_type_len
|= IXGB_TX_DESC_CMD_TSE
;
1327 popts
|= (IXGB_TX_DESC_POPTS_IXSM
| IXGB_TX_DESC_POPTS_TXSM
);
1330 if(tx_flags
& IXGB_TX_FLAGS_CSUM
)
1331 popts
|= IXGB_TX_DESC_POPTS_TXSM
;
1333 if(tx_flags
& IXGB_TX_FLAGS_VLAN
) {
1334 cmd_type_len
|= IXGB_TX_DESC_CMD_VLE
;
1337 i
= tx_ring
->next_to_use
;
1340 buffer_info
= &tx_ring
->buffer_info
[i
];
1341 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1342 tx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
1343 tx_desc
->cmd_type_len
=
1344 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
1345 tx_desc
->status
= status
;
1346 tx_desc
->popts
= popts
;
1347 tx_desc
->vlan
= cpu_to_le16(vlan_id
);
1349 if(++i
== tx_ring
->count
) i
= 0;
1352 tx_desc
->cmd_type_len
|= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1353 | IXGB_TX_DESC_CMD_RS
);
1355 /* Force memory writes to complete before letting h/w
1356 * know there are new descriptors to fetch. (Only
1357 * applicable for weak-ordered memory model archs,
1358 * such as IA-64). */
1361 tx_ring
->next_to_use
= i
;
1362 IXGB_WRITE_REG(&adapter
->hw
, TDT
, i
);
1365 /* Tx Descriptors needed, worst case */
1366 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1367 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1368 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) + \
1369 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1
1372 ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
1374 struct ixgb_adapter
*adapter
= netdev
->priv
;
1376 unsigned int tx_flags
= 0;
1377 unsigned long flags
;
1382 dev_kfree_skb_any(skb
);
1386 spin_lock_irqsave(&adapter
->tx_lock
, flags
);
1387 if(unlikely(IXGB_DESC_UNUSED(&adapter
->tx_ring
) < DESC_NEEDED
)) {
1388 netif_stop_queue(netdev
);
1389 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1392 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1394 if(adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
1395 tx_flags
|= IXGB_TX_FLAGS_VLAN
;
1396 vlan_id
= vlan_tx_tag_get(skb
);
1399 first
= adapter
->tx_ring
.next_to_use
;
1401 tso
= ixgb_tso(adapter
, skb
);
1403 dev_kfree_skb_any(skb
);
1404 return NETDEV_TX_OK
;
1408 tx_flags
|= IXGB_TX_FLAGS_TSO
;
1409 else if(ixgb_tx_csum(adapter
, skb
))
1410 tx_flags
|= IXGB_TX_FLAGS_CSUM
;
1412 ixgb_tx_queue(adapter
, ixgb_tx_map(adapter
, skb
, first
), vlan_id
,
1415 netdev
->trans_start
= jiffies
;
1421 * ixgb_tx_timeout - Respond to a Tx Hang
1422 * @netdev: network interface device structure
1426 ixgb_tx_timeout(struct net_device
*netdev
)
1428 struct ixgb_adapter
*adapter
= netdev
->priv
;
1430 /* Do the reset outside of interrupt context */
1431 schedule_work(&adapter
->tx_timeout_task
);
1435 ixgb_tx_timeout_task(struct net_device
*netdev
)
1437 struct ixgb_adapter
*adapter
= netdev
->priv
;
1439 ixgb_down(adapter
, TRUE
);
1444 * ixgb_get_stats - Get System Network Statistics
1445 * @netdev: network interface device structure
1447 * Returns the address of the device statistics structure.
1448 * The statistics are actually updated from the timer callback.
1451 static struct net_device_stats
*
1452 ixgb_get_stats(struct net_device
*netdev
)
1454 struct ixgb_adapter
*adapter
= netdev
->priv
;
1456 return &adapter
->net_stats
;
1460 * ixgb_change_mtu - Change the Maximum Transfer Unit
1461 * @netdev: network interface device structure
1462 * @new_mtu: new value for maximum frame size
1464 * Returns 0 on success, negative on failure
1468 ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
)
1470 struct ixgb_adapter
*adapter
= netdev
->priv
;
1471 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1472 int old_max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1475 if((max_frame
< IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
)
1476 || (max_frame
> IXGB_MAX_JUMBO_FRAME_SIZE
+ ENET_FCS_LENGTH
)) {
1477 IXGB_ERR("Invalid MTU setting\n");
1481 if((max_frame
<= IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
)
1482 || (max_frame
<= IXGB_RXBUFFER_2048
)) {
1483 adapter
->rx_buffer_len
= IXGB_RXBUFFER_2048
;
1485 } else if(max_frame
<= IXGB_RXBUFFER_4096
) {
1486 adapter
->rx_buffer_len
= IXGB_RXBUFFER_4096
;
1488 } else if(max_frame
<= IXGB_RXBUFFER_8192
) {
1489 adapter
->rx_buffer_len
= IXGB_RXBUFFER_8192
;
1492 adapter
->rx_buffer_len
= IXGB_RXBUFFER_16384
;
1495 netdev
->mtu
= new_mtu
;
1497 if(old_max_frame
!= max_frame
&& netif_running(netdev
)) {
1499 ixgb_down(adapter
, TRUE
);
1507 * ixgb_update_stats - Update the board statistics counters.
1508 * @adapter: board private structure
1512 ixgb_update_stats(struct ixgb_adapter
*adapter
)
1514 struct net_device
*netdev
= adapter
->netdev
;
1516 if((netdev
->flags
& IFF_PROMISC
) || (netdev
->flags
& IFF_ALLMULTI
) ||
1517 (netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
)) {
1518 u64 multi
= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1519 u32 bcast_l
= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1520 u32 bcast_h
= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1521 u64 bcast
= ((u64
)bcast_h
<< 32) | bcast_l
;
1523 multi
|= ((u64
)IXGB_READ_REG(&adapter
->hw
, MPRCH
) << 32);
1524 /* fix up multicast stats by removing broadcasts */
1527 adapter
->stats
.mprcl
+= (multi
& 0xFFFFFFFF);
1528 adapter
->stats
.mprch
+= (multi
>> 32);
1529 adapter
->stats
.bprcl
+= bcast_l
;
1530 adapter
->stats
.bprch
+= bcast_h
;
1532 adapter
->stats
.mprcl
+= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1533 adapter
->stats
.mprch
+= IXGB_READ_REG(&adapter
->hw
, MPRCH
);
1534 adapter
->stats
.bprcl
+= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1535 adapter
->stats
.bprch
+= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1537 adapter
->stats
.tprl
+= IXGB_READ_REG(&adapter
->hw
, TPRL
);
1538 adapter
->stats
.tprh
+= IXGB_READ_REG(&adapter
->hw
, TPRH
);
1539 adapter
->stats
.gprcl
+= IXGB_READ_REG(&adapter
->hw
, GPRCL
);
1540 adapter
->stats
.gprch
+= IXGB_READ_REG(&adapter
->hw
, GPRCH
);
1541 adapter
->stats
.uprcl
+= IXGB_READ_REG(&adapter
->hw
, UPRCL
);
1542 adapter
->stats
.uprch
+= IXGB_READ_REG(&adapter
->hw
, UPRCH
);
1543 adapter
->stats
.vprcl
+= IXGB_READ_REG(&adapter
->hw
, VPRCL
);
1544 adapter
->stats
.vprch
+= IXGB_READ_REG(&adapter
->hw
, VPRCH
);
1545 adapter
->stats
.jprcl
+= IXGB_READ_REG(&adapter
->hw
, JPRCL
);
1546 adapter
->stats
.jprch
+= IXGB_READ_REG(&adapter
->hw
, JPRCH
);
1547 adapter
->stats
.gorcl
+= IXGB_READ_REG(&adapter
->hw
, GORCL
);
1548 adapter
->stats
.gorch
+= IXGB_READ_REG(&adapter
->hw
, GORCH
);
1549 adapter
->stats
.torl
+= IXGB_READ_REG(&adapter
->hw
, TORL
);
1550 adapter
->stats
.torh
+= IXGB_READ_REG(&adapter
->hw
, TORH
);
1551 adapter
->stats
.rnbc
+= IXGB_READ_REG(&adapter
->hw
, RNBC
);
1552 adapter
->stats
.ruc
+= IXGB_READ_REG(&adapter
->hw
, RUC
);
1553 adapter
->stats
.roc
+= IXGB_READ_REG(&adapter
->hw
, ROC
);
1554 adapter
->stats
.rlec
+= IXGB_READ_REG(&adapter
->hw
, RLEC
);
1555 adapter
->stats
.crcerrs
+= IXGB_READ_REG(&adapter
->hw
, CRCERRS
);
1556 adapter
->stats
.icbc
+= IXGB_READ_REG(&adapter
->hw
, ICBC
);
1557 adapter
->stats
.ecbc
+= IXGB_READ_REG(&adapter
->hw
, ECBC
);
1558 adapter
->stats
.mpc
+= IXGB_READ_REG(&adapter
->hw
, MPC
);
1559 adapter
->stats
.tptl
+= IXGB_READ_REG(&adapter
->hw
, TPTL
);
1560 adapter
->stats
.tpth
+= IXGB_READ_REG(&adapter
->hw
, TPTH
);
1561 adapter
->stats
.gptcl
+= IXGB_READ_REG(&adapter
->hw
, GPTCL
);
1562 adapter
->stats
.gptch
+= IXGB_READ_REG(&adapter
->hw
, GPTCH
);
1563 adapter
->stats
.bptcl
+= IXGB_READ_REG(&adapter
->hw
, BPTCL
);
1564 adapter
->stats
.bptch
+= IXGB_READ_REG(&adapter
->hw
, BPTCH
);
1565 adapter
->stats
.mptcl
+= IXGB_READ_REG(&adapter
->hw
, MPTCL
);
1566 adapter
->stats
.mptch
+= IXGB_READ_REG(&adapter
->hw
, MPTCH
);
1567 adapter
->stats
.uptcl
+= IXGB_READ_REG(&adapter
->hw
, UPTCL
);
1568 adapter
->stats
.uptch
+= IXGB_READ_REG(&adapter
->hw
, UPTCH
);
1569 adapter
->stats
.vptcl
+= IXGB_READ_REG(&adapter
->hw
, VPTCL
);
1570 adapter
->stats
.vptch
+= IXGB_READ_REG(&adapter
->hw
, VPTCH
);
1571 adapter
->stats
.jptcl
+= IXGB_READ_REG(&adapter
->hw
, JPTCL
);
1572 adapter
->stats
.jptch
+= IXGB_READ_REG(&adapter
->hw
, JPTCH
);
1573 adapter
->stats
.gotcl
+= IXGB_READ_REG(&adapter
->hw
, GOTCL
);
1574 adapter
->stats
.gotch
+= IXGB_READ_REG(&adapter
->hw
, GOTCH
);
1575 adapter
->stats
.totl
+= IXGB_READ_REG(&adapter
->hw
, TOTL
);
1576 adapter
->stats
.toth
+= IXGB_READ_REG(&adapter
->hw
, TOTH
);
1577 adapter
->stats
.dc
+= IXGB_READ_REG(&adapter
->hw
, DC
);
1578 adapter
->stats
.plt64c
+= IXGB_READ_REG(&adapter
->hw
, PLT64C
);
1579 adapter
->stats
.tsctc
+= IXGB_READ_REG(&adapter
->hw
, TSCTC
);
1580 adapter
->stats
.tsctfc
+= IXGB_READ_REG(&adapter
->hw
, TSCTFC
);
1581 adapter
->stats
.ibic
+= IXGB_READ_REG(&adapter
->hw
, IBIC
);
1582 adapter
->stats
.rfc
+= IXGB_READ_REG(&adapter
->hw
, RFC
);
1583 adapter
->stats
.lfc
+= IXGB_READ_REG(&adapter
->hw
, LFC
);
1584 adapter
->stats
.pfrc
+= IXGB_READ_REG(&adapter
->hw
, PFRC
);
1585 adapter
->stats
.pftc
+= IXGB_READ_REG(&adapter
->hw
, PFTC
);
1586 adapter
->stats
.mcfrc
+= IXGB_READ_REG(&adapter
->hw
, MCFRC
);
1587 adapter
->stats
.mcftc
+= IXGB_READ_REG(&adapter
->hw
, MCFTC
);
1588 adapter
->stats
.xonrxc
+= IXGB_READ_REG(&adapter
->hw
, XONRXC
);
1589 adapter
->stats
.xontxc
+= IXGB_READ_REG(&adapter
->hw
, XONTXC
);
1590 adapter
->stats
.xoffrxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFRXC
);
1591 adapter
->stats
.xofftxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFTXC
);
1592 adapter
->stats
.rjc
+= IXGB_READ_REG(&adapter
->hw
, RJC
);
1594 /* Fill out the OS statistics structure */
1596 adapter
->net_stats
.rx_packets
= adapter
->stats
.gprcl
;
1597 adapter
->net_stats
.tx_packets
= adapter
->stats
.gptcl
;
1598 adapter
->net_stats
.rx_bytes
= adapter
->stats
.gorcl
;
1599 adapter
->net_stats
.tx_bytes
= adapter
->stats
.gotcl
;
1600 adapter
->net_stats
.multicast
= adapter
->stats
.mprcl
;
1601 adapter
->net_stats
.collisions
= 0;
1603 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1604 * with a length in the type/len field */
1605 adapter
->net_stats
.rx_errors
=
1606 /* adapter->stats.rnbc + */ adapter
->stats
.crcerrs
+
1607 adapter
->stats
.ruc
+
1608 adapter
->stats
.roc
/*+ adapter->stats.rlec */ +
1609 adapter
->stats
.icbc
+
1610 adapter
->stats
.ecbc
+ adapter
->stats
.mpc
;
1612 adapter
->net_stats
.rx_dropped
= adapter
->stats
.mpc
;
1615 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1618 adapter
->net_stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
1619 adapter
->net_stats
.rx_fifo_errors
= adapter
->stats
.mpc
;
1620 adapter
->net_stats
.rx_missed_errors
= adapter
->stats
.mpc
;
1621 adapter
->net_stats
.rx_over_errors
= adapter
->stats
.mpc
;
1623 adapter
->net_stats
.tx_errors
= 0;
1624 adapter
->net_stats
.rx_frame_errors
= 0;
1625 adapter
->net_stats
.tx_aborted_errors
= 0;
1626 adapter
->net_stats
.tx_carrier_errors
= 0;
1627 adapter
->net_stats
.tx_fifo_errors
= 0;
1628 adapter
->net_stats
.tx_heartbeat_errors
= 0;
1629 adapter
->net_stats
.tx_window_errors
= 0;
1632 #define IXGB_MAX_INTR 10
1634 * ixgb_intr - Interrupt Handler
1635 * @irq: interrupt number
1636 * @data: pointer to a network interface device structure
1637 * @pt_regs: CPU registers structure
1641 ixgb_intr(int irq
, void *data
, struct pt_regs
*regs
)
1643 struct net_device
*netdev
= data
;
1644 struct ixgb_adapter
*adapter
= netdev
->priv
;
1645 struct ixgb_hw
*hw
= &adapter
->hw
;
1646 uint32_t icr
= IXGB_READ_REG(hw
, ICR
);
1647 #ifndef CONFIG_IXGB_NAPI
1652 return IRQ_NONE
; /* Not our interrupt */
1654 if(unlikely(icr
& (IXGB_INT_RXSEQ
| IXGB_INT_LSC
))) {
1655 mod_timer(&adapter
->watchdog_timer
, jiffies
);
1658 #ifdef CONFIG_IXGB_NAPI
1659 if(netif_rx_schedule_prep(netdev
)) {
1661 /* Disable interrupts and register for poll. The flush
1662 of the posted write is intentionally left out.
1665 atomic_inc(&adapter
->irq_sem
);
1666 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
1667 __netif_rx_schedule(netdev
);
1670 /* yes, that is actually a & and it is meant to make sure that
1671 * every pass through this for loop checks both receive and
1672 * transmit queues for completed descriptors, intended to
1673 * avoid starvation issues and assist tx/rx fairness. */
1674 for(i
= 0; i
< IXGB_MAX_INTR
; i
++)
1675 if(!ixgb_clean_rx_irq(adapter
) &
1676 !ixgb_clean_tx_irq(adapter
))
1682 #ifdef CONFIG_IXGB_NAPI
1684 * ixgb_clean - NAPI Rx polling callback
1685 * @adapter: board private structure
1689 ixgb_clean(struct net_device
*netdev
, int *budget
)
1691 struct ixgb_adapter
*adapter
= netdev
->priv
;
1692 int work_to_do
= min(*budget
, netdev
->quota
);
1696 tx_cleaned
= ixgb_clean_tx_irq(adapter
);
1697 ixgb_clean_rx_irq(adapter
, &work_done
, work_to_do
);
1699 *budget
-= work_done
;
1700 netdev
->quota
-= work_done
;
1702 /* if no Tx and not enough Rx work done, exit the polling mode */
1703 if((!tx_cleaned
&& (work_done
== 0)) || !netif_running(netdev
)) {
1704 netif_rx_complete(netdev
);
1705 ixgb_irq_enable(adapter
);
1714 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1715 * @adapter: board private structure
1719 ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
)
1721 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1722 struct net_device
*netdev
= adapter
->netdev
;
1723 struct ixgb_tx_desc
*tx_desc
, *eop_desc
;
1724 struct ixgb_buffer
*buffer_info
;
1725 unsigned int i
, eop
;
1726 boolean_t cleaned
= FALSE
;
1728 i
= tx_ring
->next_to_clean
;
1729 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1730 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1732 while(eop_desc
->status
& IXGB_TX_DESC_STATUS_DD
) {
1734 for(cleaned
= FALSE
; !cleaned
; ) {
1735 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1736 buffer_info
= &tx_ring
->buffer_info
[i
];
1739 & (IXGB_TX_DESC_POPTS_TXSM
|
1740 IXGB_TX_DESC_POPTS_IXSM
))
1741 adapter
->hw_csum_tx_good
++;
1743 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
1745 *(uint32_t *)&(tx_desc
->status
) = 0;
1747 cleaned
= (i
== eop
);
1748 if(++i
== tx_ring
->count
) i
= 0;
1751 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1752 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1755 tx_ring
->next_to_clean
= i
;
1757 spin_lock(&adapter
->tx_lock
);
1758 if(cleaned
&& netif_queue_stopped(netdev
) && netif_carrier_ok(netdev
) &&
1759 (IXGB_DESC_UNUSED(tx_ring
) > IXGB_TX_QUEUE_WAKE
)) {
1761 netif_wake_queue(netdev
);
1763 spin_unlock(&adapter
->tx_lock
);
1765 if(adapter
->detect_tx_hung
) {
1766 /* detect a transmit hang in hardware, this serializes the
1767 * check with the clearing of time_stamp and movement of i */
1768 adapter
->detect_tx_hung
= FALSE
;
1769 if(tx_ring
->buffer_info
[i
].dma
&&
1770 time_after(jiffies
, tx_ring
->buffer_info
[i
].time_stamp
+ HZ
)
1771 && !(IXGB_READ_REG(&adapter
->hw
, STATUS
) &
1773 netif_stop_queue(netdev
);
1780 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1781 * @adapter: board private structure
1782 * @rx_desc: receive descriptor
1783 * @sk_buff: socket buffer with received data
1787 ixgb_rx_checksum(struct ixgb_adapter
*adapter
,
1788 struct ixgb_rx_desc
*rx_desc
,
1789 struct sk_buff
*skb
)
1791 /* Ignore Checksum bit is set OR
1792 * TCP Checksum has not been calculated
1794 if((rx_desc
->status
& IXGB_RX_DESC_STATUS_IXSM
) ||
1795 (!(rx_desc
->status
& IXGB_RX_DESC_STATUS_TCPCS
))) {
1796 skb
->ip_summed
= CHECKSUM_NONE
;
1800 /* At this point we know the hardware did the TCP checksum */
1801 /* now look at the TCP checksum error bit */
1802 if(rx_desc
->errors
& IXGB_RX_DESC_ERRORS_TCPE
) {
1803 /* let the stack verify checksum errors */
1804 skb
->ip_summed
= CHECKSUM_NONE
;
1805 adapter
->hw_csum_rx_error
++;
1807 /* TCP checksum is good */
1808 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1809 adapter
->hw_csum_rx_good
++;
1814 * ixgb_clean_rx_irq - Send received data up the network stack,
1815 * @adapter: board private structure
1819 #ifdef CONFIG_IXGB_NAPI
1820 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
, int *work_done
, int work_to_do
)
1822 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
)
1825 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1826 struct net_device
*netdev
= adapter
->netdev
;
1827 struct pci_dev
*pdev
= adapter
->pdev
;
1828 struct ixgb_rx_desc
*rx_desc
, *next_rxd
;
1829 struct ixgb_buffer
*buffer_info
, *next_buffer
, *next2_buffer
;
1832 boolean_t cleaned
= FALSE
;
1834 i
= rx_ring
->next_to_clean
;
1835 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
1836 buffer_info
= &rx_ring
->buffer_info
[i
];
1838 while(rx_desc
->status
& IXGB_RX_DESC_STATUS_DD
) {
1839 struct sk_buff
*skb
, *next_skb
;
1842 #ifdef CONFIG_IXGB_NAPI
1843 if(*work_done
>= work_to_do
)
1848 status
= rx_desc
->status
;
1849 skb
= buffer_info
->skb
;
1851 prefetch(skb
->data
);
1853 if(++i
== rx_ring
->count
) i
= 0;
1854 next_rxd
= IXGB_RX_DESC(*rx_ring
, i
);
1857 if((j
= i
+ 1) == rx_ring
->count
) j
= 0;
1858 next2_buffer
= &rx_ring
->buffer_info
[j
];
1859 prefetch(next2_buffer
);
1861 next_buffer
= &rx_ring
->buffer_info
[i
];
1862 next_skb
= next_buffer
->skb
;
1867 pci_unmap_single(pdev
,
1869 buffer_info
->length
,
1870 PCI_DMA_FROMDEVICE
);
1872 length
= le16_to_cpu(rx_desc
->length
);
1874 if(unlikely(!(status
& IXGB_RX_DESC_STATUS_EOP
))) {
1876 /* All receives must fit into a single buffer */
1878 IXGB_DBG("Receive packet consumed multiple buffers "
1879 "length<%x>\n", length
);
1881 dev_kfree_skb_irq(skb
);
1885 if (unlikely(rx_desc
->errors
1886 & (IXGB_RX_DESC_ERRORS_CE
| IXGB_RX_DESC_ERRORS_SE
1887 | IXGB_RX_DESC_ERRORS_P
|
1888 IXGB_RX_DESC_ERRORS_RXE
))) {
1890 dev_kfree_skb_irq(skb
);
1895 skb_put(skb
, length
);
1897 /* Receive Checksum Offload */
1898 ixgb_rx_checksum(adapter
, rx_desc
, skb
);
1900 skb
->protocol
= eth_type_trans(skb
, netdev
);
1901 #ifdef CONFIG_IXGB_NAPI
1902 if(adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
1903 vlan_hwaccel_receive_skb(skb
, adapter
->vlgrp
,
1904 le16_to_cpu(rx_desc
->special
) &
1905 IXGB_RX_DESC_SPECIAL_VLAN_MASK
);
1907 netif_receive_skb(skb
);
1909 #else /* CONFIG_IXGB_NAPI */
1910 if(adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
1911 vlan_hwaccel_rx(skb
, adapter
->vlgrp
,
1912 le16_to_cpu(rx_desc
->special
) &
1913 IXGB_RX_DESC_SPECIAL_VLAN_MASK
);
1917 #endif /* CONFIG_IXGB_NAPI */
1918 netdev
->last_rx
= jiffies
;
1921 /* clean up descriptor, might be written over by hw */
1922 rx_desc
->status
= 0;
1923 buffer_info
->skb
= NULL
;
1925 /* use prefetched values */
1927 buffer_info
= next_buffer
;
1930 rx_ring
->next_to_clean
= i
;
1932 ixgb_alloc_rx_buffers(adapter
);
1938 * ixgb_alloc_rx_buffers - Replace used receive buffers
1939 * @adapter: address of board private structure
1943 ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
)
1945 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1946 struct net_device
*netdev
= adapter
->netdev
;
1947 struct pci_dev
*pdev
= adapter
->pdev
;
1948 struct ixgb_rx_desc
*rx_desc
;
1949 struct ixgb_buffer
*buffer_info
;
1950 struct sk_buff
*skb
;
1952 int num_group_tail_writes
;
1955 i
= rx_ring
->next_to_use
;
1956 buffer_info
= &rx_ring
->buffer_info
[i
];
1957 cleancount
= IXGB_DESC_UNUSED(rx_ring
);
1959 num_group_tail_writes
= IXGB_RX_BUFFER_WRITE
;
1961 /* leave three descriptors unused */
1962 while(--cleancount
> 2) {
1963 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
1965 skb
= dev_alloc_skb(adapter
->rx_buffer_len
+ NET_IP_ALIGN
);
1967 if(unlikely(!skb
)) {
1968 /* Better luck next round */
1972 /* Make buffer alignment 2 beyond a 16 byte boundary
1973 * this will result in a 16 byte aligned IP header after
1974 * the 14 byte MAC header is removed
1976 skb_reserve(skb
, NET_IP_ALIGN
);
1980 buffer_info
->skb
= skb
;
1981 buffer_info
->length
= adapter
->rx_buffer_len
;
1983 pci_map_single(pdev
,
1985 adapter
->rx_buffer_len
,
1986 PCI_DMA_FROMDEVICE
);
1988 rx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
1989 /* guarantee DD bit not set now before h/w gets descriptor
1990 * this is the rest of the workaround for h/w double
1992 rx_desc
->status
= 0;
1994 if((i
& ~(num_group_tail_writes
- 1)) == i
) {
1995 /* Force memory writes to complete before letting h/w
1996 * know there are new descriptors to fetch. (Only
1997 * applicable for weak-ordered memory model archs,
1998 * such as IA-64). */
2001 IXGB_WRITE_REG(&adapter
->hw
, RDT
, i
);
2004 if(++i
== rx_ring
->count
) i
= 0;
2005 buffer_info
= &rx_ring
->buffer_info
[i
];
2008 rx_ring
->next_to_use
= i
;
2012 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2014 * @param netdev network interface device structure
2015 * @param grp indicates to enable or disable tagging/stripping
2018 ixgb_vlan_rx_register(struct net_device
*netdev
, struct vlan_group
*grp
)
2020 struct ixgb_adapter
*adapter
= netdev
->priv
;
2021 uint32_t ctrl
, rctl
;
2023 ixgb_irq_disable(adapter
);
2024 adapter
->vlgrp
= grp
;
2027 /* enable VLAN tag insert/strip */
2028 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2029 ctrl
|= IXGB_CTRL0_VME
;
2030 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2032 /* enable VLAN receive filtering */
2034 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2035 rctl
|= IXGB_RCTL_VFE
;
2036 rctl
&= ~IXGB_RCTL_CFIEN
;
2037 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2039 /* disable VLAN tag insert/strip */
2041 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2042 ctrl
&= ~IXGB_CTRL0_VME
;
2043 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2045 /* disable VLAN filtering */
2047 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2048 rctl
&= ~IXGB_RCTL_VFE
;
2049 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2052 ixgb_irq_enable(adapter
);
2056 ixgb_vlan_rx_add_vid(struct net_device
*netdev
, uint16_t vid
)
2058 struct ixgb_adapter
*adapter
= netdev
->priv
;
2059 uint32_t vfta
, index
;
2061 /* add VID to filter table */
2063 index
= (vid
>> 5) & 0x7F;
2064 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2065 vfta
|= (1 << (vid
& 0x1F));
2066 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2070 ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, uint16_t vid
)
2072 struct ixgb_adapter
*adapter
= netdev
->priv
;
2073 uint32_t vfta
, index
;
2075 ixgb_irq_disable(adapter
);
2078 adapter
->vlgrp
->vlan_devices
[vid
] = NULL
;
2080 ixgb_irq_enable(adapter
);
2082 /* remove VID from filter table*/
2084 index
= (vid
>> 5) & 0x7F;
2085 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2086 vfta
&= ~(1 << (vid
& 0x1F));
2087 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2091 ixgb_restore_vlan(struct ixgb_adapter
*adapter
)
2093 ixgb_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
2095 if(adapter
->vlgrp
) {
2097 for(vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
2098 if(!adapter
->vlgrp
->vlan_devices
[vid
])
2100 ixgb_vlan_rx_add_vid(adapter
->netdev
, vid
);
2105 #ifdef CONFIG_NET_POLL_CONTROLLER
2107 * Polling 'interrupt' - used by things like netconsole to send skbs
2108 * without having to re-enable interrupts. It's not called while
2109 * the interrupt routine is executing.
2112 static void ixgb_netpoll(struct net_device
*dev
)
2114 struct ixgb_adapter
*adapter
= dev
->priv
;
2116 disable_irq(adapter
->pdev
->irq
);
2117 ixgb_intr(adapter
->pdev
->irq
, dev
, NULL
);
2118 enable_irq(adapter
->pdev
->irq
);