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 * - Make needlessly global code static -- bunk@stusta.de
34 * - ethtool cleanup -- shemminger@osdl.org
35 * - Support for MODULE_VERSION -- linville@tuxdriver.com
36 * - add skb_header_cloned check to the tso path -- herbert@apana.org.au
38 * - include fix to the condition that determines when to quit NAPI - Robert Olsson
39 * - use netif_poll_{disable/enable} to synchronize between NAPI and i/f up/down
41 * - reset buffer_info->dma in Tx resource cleanup logic
43 * - sparse cleanup - shemminger@osdl.org
44 * - fix tx resource cleanup logic
47 char ixgb_driver_name
[] = "ixgb";
48 static char ixgb_driver_string
[] = "Intel(R) PRO/10GbE Network Driver";
50 #ifndef CONFIG_IXGB_NAPI
53 #define DRIVERNAPI "-NAPI"
55 #define DRV_VERSION "1.0.100-k2"DRIVERNAPI
56 char ixgb_driver_version
[] = DRV_VERSION
;
57 static char ixgb_copyright
[] = "Copyright (c) 1999-2005 Intel Corporation.";
59 /* ixgb_pci_tbl - PCI Device ID Table
61 * Wildcard entries (PCI_ANY_ID) should come last
62 * Last entry must be all 0s
64 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
65 * Class, Class Mask, private data (not used) }
67 static struct pci_device_id ixgb_pci_tbl
[] = {
68 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX
,
69 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
70 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_SR
,
71 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
72 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_LR
,
73 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
75 /* required last entry */
79 MODULE_DEVICE_TABLE(pci
, ixgb_pci_tbl
);
81 /* Local Function Prototypes */
83 int ixgb_up(struct ixgb_adapter
*adapter
);
84 void ixgb_down(struct ixgb_adapter
*adapter
, boolean_t kill_watchdog
);
85 void ixgb_reset(struct ixgb_adapter
*adapter
);
86 int ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
);
87 int ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
);
88 void ixgb_free_tx_resources(struct ixgb_adapter
*adapter
);
89 void ixgb_free_rx_resources(struct ixgb_adapter
*adapter
);
90 void ixgb_update_stats(struct ixgb_adapter
*adapter
);
92 static int ixgb_init_module(void);
93 static void ixgb_exit_module(void);
94 static int ixgb_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
95 static void __devexit
ixgb_remove(struct pci_dev
*pdev
);
96 static int ixgb_sw_init(struct ixgb_adapter
*adapter
);
97 static int ixgb_open(struct net_device
*netdev
);
98 static int ixgb_close(struct net_device
*netdev
);
99 static void ixgb_configure_tx(struct ixgb_adapter
*adapter
);
100 static void ixgb_configure_rx(struct ixgb_adapter
*adapter
);
101 static void ixgb_setup_rctl(struct ixgb_adapter
*adapter
);
102 static void ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
);
103 static void ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
);
104 static void ixgb_set_multi(struct net_device
*netdev
);
105 static void ixgb_watchdog(unsigned long data
);
106 static int ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
);
107 static struct net_device_stats
*ixgb_get_stats(struct net_device
*netdev
);
108 static int ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
);
109 static int ixgb_set_mac(struct net_device
*netdev
, void *p
);
110 static irqreturn_t
ixgb_intr(int irq
, void *data
, struct pt_regs
*regs
);
111 static boolean_t
ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
);
113 #ifdef CONFIG_IXGB_NAPI
114 static int ixgb_clean(struct net_device
*netdev
, int *budget
);
115 static boolean_t
ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
,
116 int *work_done
, int work_to_do
);
118 static boolean_t
ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
);
120 static void ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
);
121 void ixgb_set_ethtool_ops(struct net_device
*netdev
);
122 static void ixgb_tx_timeout(struct net_device
*dev
);
123 static void ixgb_tx_timeout_task(struct net_device
*dev
);
124 static void ixgb_vlan_rx_register(struct net_device
*netdev
,
125 struct vlan_group
*grp
);
126 static void ixgb_vlan_rx_add_vid(struct net_device
*netdev
, uint16_t vid
);
127 static void ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, uint16_t vid
);
128 static void ixgb_restore_vlan(struct ixgb_adapter
*adapter
);
130 #ifdef CONFIG_NET_POLL_CONTROLLER
131 /* for netdump / net console */
132 static void ixgb_netpoll(struct net_device
*dev
);
135 /* Exported from other modules */
137 extern void ixgb_check_options(struct ixgb_adapter
*adapter
);
139 static struct pci_driver ixgb_driver
= {
140 .name
= ixgb_driver_name
,
141 .id_table
= ixgb_pci_tbl
,
143 .remove
= __devexit_p(ixgb_remove
),
146 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
147 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
148 MODULE_LICENSE("GPL");
149 MODULE_VERSION(DRV_VERSION
);
151 /* some defines for controlling descriptor fetches in h/w */
152 #define RXDCTL_WTHRESH_DEFAULT 16 /* chip writes back at this many or RXT0 */
153 #define RXDCTL_PTHRESH_DEFAULT 0 /* chip considers prefech below
155 #define RXDCTL_HTHRESH_DEFAULT 0 /* chip will only prefetch if tail
156 * is pushed this many descriptors
160 * ixgb_init_module - Driver Registration Routine
162 * ixgb_init_module is the first routine called when the driver is
163 * loaded. All it does is register with the PCI subsystem.
167 ixgb_init_module(void)
169 printk(KERN_INFO
"%s - version %s\n",
170 ixgb_driver_string
, ixgb_driver_version
);
172 printk(KERN_INFO
"%s\n", ixgb_copyright
);
174 return pci_module_init(&ixgb_driver
);
177 module_init(ixgb_init_module
);
180 * ixgb_exit_module - Driver Exit Cleanup Routine
182 * ixgb_exit_module is called just before the driver is removed
187 ixgb_exit_module(void)
189 pci_unregister_driver(&ixgb_driver
);
192 module_exit(ixgb_exit_module
);
195 * ixgb_irq_disable - Mask off interrupt generation on the NIC
196 * @adapter: board private structure
200 ixgb_irq_disable(struct ixgb_adapter
*adapter
)
202 atomic_inc(&adapter
->irq_sem
);
203 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
204 IXGB_WRITE_FLUSH(&adapter
->hw
);
205 synchronize_irq(adapter
->pdev
->irq
);
209 * ixgb_irq_enable - Enable default interrupt generation settings
210 * @adapter: board private structure
214 ixgb_irq_enable(struct ixgb_adapter
*adapter
)
216 if(atomic_dec_and_test(&adapter
->irq_sem
)) {
217 IXGB_WRITE_REG(&adapter
->hw
, IMS
,
218 IXGB_INT_RXT0
| IXGB_INT_RXDMT0
| IXGB_INT_TXDW
|
220 IXGB_WRITE_FLUSH(&adapter
->hw
);
225 ixgb_up(struct ixgb_adapter
*adapter
)
227 struct net_device
*netdev
= adapter
->netdev
;
229 int max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
230 struct ixgb_hw
*hw
= &adapter
->hw
;
232 /* hardware has been reset, we need to reload some things */
234 ixgb_set_multi(netdev
);
236 ixgb_restore_vlan(adapter
);
238 ixgb_configure_tx(adapter
);
239 ixgb_setup_rctl(adapter
);
240 ixgb_configure_rx(adapter
);
241 ixgb_alloc_rx_buffers(adapter
);
243 #ifdef CONFIG_PCI_MSI
245 boolean_t pcix
= (IXGB_READ_REG(&adapter
->hw
, STATUS
) &
246 IXGB_STATUS_PCIX_MODE
) ? TRUE
: FALSE
;
247 adapter
->have_msi
= TRUE
;
250 adapter
->have_msi
= FALSE
;
251 else if((err
= pci_enable_msi(adapter
->pdev
))) {
253 "Unable to allocate MSI interrupt Error: %d\n", err
);
254 adapter
->have_msi
= FALSE
;
255 /* proceed to try to request regular interrupt */
260 if((err
= request_irq(adapter
->pdev
->irq
, &ixgb_intr
,
261 SA_SHIRQ
| SA_SAMPLE_RANDOM
,
262 netdev
->name
, netdev
)))
265 /* disable interrupts and get the hardware into a known state */
266 IXGB_WRITE_REG(&adapter
->hw
, IMC
, 0xffffffff);
268 if((hw
->max_frame_size
!= max_frame
) ||
269 (hw
->max_frame_size
!=
270 (IXGB_READ_REG(hw
, MFS
) >> IXGB_MFS_SHIFT
))) {
272 hw
->max_frame_size
= max_frame
;
274 IXGB_WRITE_REG(hw
, MFS
, hw
->max_frame_size
<< IXGB_MFS_SHIFT
);
276 if(hw
->max_frame_size
>
277 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
) {
278 uint32_t ctrl0
= IXGB_READ_REG(hw
, CTRL0
);
280 if(!(ctrl0
& IXGB_CTRL0_JFE
)) {
281 ctrl0
|= IXGB_CTRL0_JFE
;
282 IXGB_WRITE_REG(hw
, CTRL0
, ctrl0
);
287 mod_timer(&adapter
->watchdog_timer
, jiffies
);
288 ixgb_irq_enable(adapter
);
290 #ifdef CONFIG_IXGB_NAPI
291 netif_poll_enable(netdev
);
297 ixgb_down(struct ixgb_adapter
*adapter
, boolean_t kill_watchdog
)
299 struct net_device
*netdev
= adapter
->netdev
;
301 ixgb_irq_disable(adapter
);
302 free_irq(adapter
->pdev
->irq
, netdev
);
303 #ifdef CONFIG_PCI_MSI
304 if(adapter
->have_msi
== TRUE
)
305 pci_disable_msi(adapter
->pdev
);
309 del_timer_sync(&adapter
->watchdog_timer
);
310 #ifdef CONFIG_IXGB_NAPI
311 netif_poll_disable(netdev
);
313 adapter
->link_speed
= 0;
314 adapter
->link_duplex
= 0;
315 netif_carrier_off(netdev
);
316 netif_stop_queue(netdev
);
319 ixgb_clean_tx_ring(adapter
);
320 ixgb_clean_rx_ring(adapter
);
324 ixgb_reset(struct ixgb_adapter
*adapter
)
327 ixgb_adapter_stop(&adapter
->hw
);
328 if(!ixgb_init_hw(&adapter
->hw
))
329 IXGB_DBG("ixgb_init_hw failed.\n");
333 * ixgb_probe - Device Initialization Routine
334 * @pdev: PCI device information struct
335 * @ent: entry in ixgb_pci_tbl
337 * Returns 0 on success, negative on failure
339 * ixgb_probe initializes an adapter identified by a pci_dev structure.
340 * The OS initialization, configuring of the adapter private structure,
341 * and a hardware reset occur.
345 ixgb_probe(struct pci_dev
*pdev
,
346 const struct pci_device_id
*ent
)
348 struct net_device
*netdev
= NULL
;
349 struct ixgb_adapter
*adapter
;
350 static int cards_found
= 0;
351 unsigned long mmio_start
;
357 if((err
= pci_enable_device(pdev
)))
360 if(!(err
= pci_set_dma_mask(pdev
, DMA_64BIT_MASK
))) {
363 if((err
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
))) {
364 IXGB_ERR("No usable DMA configuration, aborting\n");
370 if((err
= pci_request_regions(pdev
, ixgb_driver_name
)))
373 pci_set_master(pdev
);
375 netdev
= alloc_etherdev(sizeof(struct ixgb_adapter
));
378 goto err_alloc_etherdev
;
381 SET_MODULE_OWNER(netdev
);
382 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
384 pci_set_drvdata(pdev
, netdev
);
385 adapter
= netdev_priv(netdev
);
386 adapter
->netdev
= netdev
;
387 adapter
->pdev
= pdev
;
388 adapter
->hw
.back
= adapter
;
390 mmio_start
= pci_resource_start(pdev
, BAR_0
);
391 mmio_len
= pci_resource_len(pdev
, BAR_0
);
393 adapter
->hw
.hw_addr
= ioremap(mmio_start
, mmio_len
);
394 if(!adapter
->hw
.hw_addr
) {
399 for(i
= BAR_1
; i
<= BAR_5
; i
++) {
400 if(pci_resource_len(pdev
, i
) == 0)
402 if(pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
403 adapter
->hw
.io_base
= pci_resource_start(pdev
, i
);
408 netdev
->open
= &ixgb_open
;
409 netdev
->stop
= &ixgb_close
;
410 netdev
->hard_start_xmit
= &ixgb_xmit_frame
;
411 netdev
->get_stats
= &ixgb_get_stats
;
412 netdev
->set_multicast_list
= &ixgb_set_multi
;
413 netdev
->set_mac_address
= &ixgb_set_mac
;
414 netdev
->change_mtu
= &ixgb_change_mtu
;
415 ixgb_set_ethtool_ops(netdev
);
416 netdev
->tx_timeout
= &ixgb_tx_timeout
;
417 netdev
->watchdog_timeo
= HZ
;
418 #ifdef CONFIG_IXGB_NAPI
419 netdev
->poll
= &ixgb_clean
;
422 netdev
->vlan_rx_register
= ixgb_vlan_rx_register
;
423 netdev
->vlan_rx_add_vid
= ixgb_vlan_rx_add_vid
;
424 netdev
->vlan_rx_kill_vid
= ixgb_vlan_rx_kill_vid
;
425 #ifdef CONFIG_NET_POLL_CONTROLLER
426 netdev
->poll_controller
= ixgb_netpoll
;
429 netdev
->mem_start
= mmio_start
;
430 netdev
->mem_end
= mmio_start
+ mmio_len
;
431 netdev
->base_addr
= adapter
->hw
.io_base
;
433 adapter
->bd_number
= cards_found
;
434 adapter
->link_speed
= 0;
435 adapter
->link_duplex
= 0;
437 /* setup the private structure */
439 if((err
= ixgb_sw_init(adapter
)))
442 netdev
->features
= NETIF_F_SG
|
446 NETIF_F_HW_VLAN_FILTER
;
448 netdev
->features
|= NETIF_F_TSO
;
452 netdev
->features
|= NETIF_F_HIGHDMA
;
454 /* make sure the EEPROM is good */
456 if(!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
457 printk(KERN_ERR
"The EEPROM Checksum Is Not Valid\n");
462 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
463 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
465 if(!is_valid_ether_addr(netdev
->perm_addr
)) {
470 adapter
->part_num
= ixgb_get_ee_pba_number(&adapter
->hw
);
472 init_timer(&adapter
->watchdog_timer
);
473 adapter
->watchdog_timer
.function
= &ixgb_watchdog
;
474 adapter
->watchdog_timer
.data
= (unsigned long)adapter
;
476 INIT_WORK(&adapter
->tx_timeout_task
,
477 (void (*)(void *))ixgb_tx_timeout_task
, netdev
);
479 if((err
= register_netdev(netdev
)))
482 /* we're going to reset, so assume we have no link for now */
484 netif_carrier_off(netdev
);
485 netif_stop_queue(netdev
);
487 printk(KERN_INFO
"%s: Intel(R) PRO/10GbE Network Connection\n",
489 ixgb_check_options(adapter
);
490 /* reset the hardware with the new settings */
500 iounmap(adapter
->hw
.hw_addr
);
504 pci_release_regions(pdev
);
509 * ixgb_remove - Device Removal Routine
510 * @pdev: PCI device information struct
512 * ixgb_remove is called by the PCI subsystem to alert the driver
513 * that it should release a PCI device. The could be caused by a
514 * Hot-Plug event, or because the driver is going to be removed from
518 static void __devexit
519 ixgb_remove(struct pci_dev
*pdev
)
521 struct net_device
*netdev
= pci_get_drvdata(pdev
);
522 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
524 unregister_netdev(netdev
);
526 iounmap(adapter
->hw
.hw_addr
);
527 pci_release_regions(pdev
);
533 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
534 * @adapter: board private structure to initialize
536 * ixgb_sw_init initializes the Adapter private data structure.
537 * Fields are initialized based on PCI device information and
538 * OS network device settings (MTU size).
542 ixgb_sw_init(struct ixgb_adapter
*adapter
)
544 struct ixgb_hw
*hw
= &adapter
->hw
;
545 struct net_device
*netdev
= adapter
->netdev
;
546 struct pci_dev
*pdev
= adapter
->pdev
;
548 /* PCI config space info */
550 hw
->vendor_id
= pdev
->vendor
;
551 hw
->device_id
= pdev
->device
;
552 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
553 hw
->subsystem_id
= pdev
->subsystem_device
;
555 adapter
->rx_buffer_len
= IXGB_RXBUFFER_2048
;
557 hw
->max_frame_size
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
559 if((hw
->device_id
== IXGB_DEVICE_ID_82597EX
)
560 ||(hw
->device_id
== IXGB_DEVICE_ID_82597EX_LR
)
561 ||(hw
->device_id
== IXGB_DEVICE_ID_82597EX_SR
))
562 hw
->mac_type
= ixgb_82597
;
564 /* should never have loaded on this device */
565 printk(KERN_ERR
"ixgb: unsupported device id\n");
568 /* enable flow control to be programmed */
571 atomic_set(&adapter
->irq_sem
, 1);
572 spin_lock_init(&adapter
->tx_lock
);
578 * ixgb_open - Called when a network interface is made active
579 * @netdev: network interface device structure
581 * Returns 0 on success, negative value on failure
583 * The open entry point is called when a network interface is made
584 * active by the system (IFF_UP). At this point all resources needed
585 * for transmit and receive operations are allocated, the interrupt
586 * handler is registered with the OS, the watchdog timer is started,
587 * and the stack is notified that the interface is ready.
591 ixgb_open(struct net_device
*netdev
)
593 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
596 /* allocate transmit descriptors */
598 if((err
= ixgb_setup_tx_resources(adapter
)))
601 /* allocate receive descriptors */
603 if((err
= ixgb_setup_rx_resources(adapter
)))
606 if((err
= ixgb_up(adapter
)))
612 ixgb_free_rx_resources(adapter
);
614 ixgb_free_tx_resources(adapter
);
622 * ixgb_close - Disables a network interface
623 * @netdev: network interface device structure
625 * Returns 0, this is not allowed to fail
627 * The close entry point is called when an interface is de-activated
628 * by the OS. The hardware is still under the drivers control, but
629 * needs to be disabled. A global MAC reset is issued to stop the
630 * hardware, and all transmit and receive resources are freed.
634 ixgb_close(struct net_device
*netdev
)
636 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
638 ixgb_down(adapter
, TRUE
);
640 ixgb_free_tx_resources(adapter
);
641 ixgb_free_rx_resources(adapter
);
647 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
648 * @adapter: board private structure
650 * Return 0 on success, negative on failure
654 ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
)
656 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
657 struct pci_dev
*pdev
= adapter
->pdev
;
660 size
= sizeof(struct ixgb_buffer
) * txdr
->count
;
661 txdr
->buffer_info
= vmalloc(size
);
662 if(!txdr
->buffer_info
) {
665 memset(txdr
->buffer_info
, 0, size
);
667 /* round up to nearest 4K */
669 txdr
->size
= txdr
->count
* sizeof(struct ixgb_tx_desc
);
670 IXGB_ROUNDUP(txdr
->size
, 4096);
672 txdr
->desc
= pci_alloc_consistent(pdev
, txdr
->size
, &txdr
->dma
);
674 vfree(txdr
->buffer_info
);
677 memset(txdr
->desc
, 0, txdr
->size
);
679 txdr
->next_to_use
= 0;
680 txdr
->next_to_clean
= 0;
686 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
687 * @adapter: board private structure
689 * Configure the Tx unit of the MAC after a reset.
693 ixgb_configure_tx(struct ixgb_adapter
*adapter
)
695 uint64_t tdba
= adapter
->tx_ring
.dma
;
696 uint32_t tdlen
= adapter
->tx_ring
.count
* sizeof(struct ixgb_tx_desc
);
698 struct ixgb_hw
*hw
= &adapter
->hw
;
700 /* Setup the Base and Length of the Tx Descriptor Ring
701 * tx_ring.dma can be either a 32 or 64 bit value
704 IXGB_WRITE_REG(hw
, TDBAL
, (tdba
& 0x00000000ffffffffULL
));
705 IXGB_WRITE_REG(hw
, TDBAH
, (tdba
>> 32));
707 IXGB_WRITE_REG(hw
, TDLEN
, tdlen
);
709 /* Setup the HW Tx Head and Tail descriptor pointers */
711 IXGB_WRITE_REG(hw
, TDH
, 0);
712 IXGB_WRITE_REG(hw
, TDT
, 0);
714 /* don't set up txdctl, it induces performance problems if configured
716 /* Set the Tx Interrupt Delay register */
718 IXGB_WRITE_REG(hw
, TIDV
, adapter
->tx_int_delay
);
720 /* Program the Transmit Control Register */
722 tctl
= IXGB_TCTL_TCE
| IXGB_TCTL_TXEN
| IXGB_TCTL_TPDE
;
723 IXGB_WRITE_REG(hw
, TCTL
, tctl
);
725 /* Setup Transmit Descriptor Settings for this adapter */
726 adapter
->tx_cmd_type
=
728 | (adapter
->tx_int_delay_enable
? IXGB_TX_DESC_CMD_IDE
: 0);
732 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
733 * @adapter: board private structure
735 * Returns 0 on success, negative on failure
739 ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
)
741 struct ixgb_desc_ring
*rxdr
= &adapter
->rx_ring
;
742 struct pci_dev
*pdev
= adapter
->pdev
;
745 size
= sizeof(struct ixgb_buffer
) * rxdr
->count
;
746 rxdr
->buffer_info
= vmalloc(size
);
747 if(!rxdr
->buffer_info
) {
750 memset(rxdr
->buffer_info
, 0, size
);
752 /* Round up to nearest 4K */
754 rxdr
->size
= rxdr
->count
* sizeof(struct ixgb_rx_desc
);
755 IXGB_ROUNDUP(rxdr
->size
, 4096);
757 rxdr
->desc
= pci_alloc_consistent(pdev
, rxdr
->size
, &rxdr
->dma
);
760 vfree(rxdr
->buffer_info
);
763 memset(rxdr
->desc
, 0, rxdr
->size
);
765 rxdr
->next_to_clean
= 0;
766 rxdr
->next_to_use
= 0;
772 * ixgb_setup_rctl - configure the receive control register
773 * @adapter: Board private structure
777 ixgb_setup_rctl(struct ixgb_adapter
*adapter
)
781 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
783 rctl
&= ~(3 << IXGB_RCTL_MO_SHIFT
);
786 IXGB_RCTL_BAM
| IXGB_RCTL_RDMTS_1_2
|
787 IXGB_RCTL_RXEN
| IXGB_RCTL_CFF
|
788 (adapter
->hw
.mc_filter_type
<< IXGB_RCTL_MO_SHIFT
);
790 rctl
|= IXGB_RCTL_SECRC
;
792 switch (adapter
->rx_buffer_len
) {
793 case IXGB_RXBUFFER_2048
:
795 rctl
|= IXGB_RCTL_BSIZE_2048
;
797 case IXGB_RXBUFFER_4096
:
798 rctl
|= IXGB_RCTL_BSIZE_4096
;
800 case IXGB_RXBUFFER_8192
:
801 rctl
|= IXGB_RCTL_BSIZE_8192
;
803 case IXGB_RXBUFFER_16384
:
804 rctl
|= IXGB_RCTL_BSIZE_16384
;
808 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
812 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
813 * @adapter: board private structure
815 * Configure the Rx unit of the MAC after a reset.
819 ixgb_configure_rx(struct ixgb_adapter
*adapter
)
821 uint64_t rdba
= adapter
->rx_ring
.dma
;
822 uint32_t rdlen
= adapter
->rx_ring
.count
* sizeof(struct ixgb_rx_desc
);
823 struct ixgb_hw
*hw
= &adapter
->hw
;
828 /* make sure receives are disabled while setting up the descriptors */
830 rctl
= IXGB_READ_REG(hw
, RCTL
);
831 IXGB_WRITE_REG(hw
, RCTL
, rctl
& ~IXGB_RCTL_RXEN
);
833 /* set the Receive Delay Timer Register */
835 IXGB_WRITE_REG(hw
, RDTR
, adapter
->rx_int_delay
);
837 /* Setup the Base and Length of the Rx Descriptor Ring */
839 IXGB_WRITE_REG(hw
, RDBAL
, (rdba
& 0x00000000ffffffffULL
));
840 IXGB_WRITE_REG(hw
, RDBAH
, (rdba
>> 32));
842 IXGB_WRITE_REG(hw
, RDLEN
, rdlen
);
844 /* Setup the HW Rx Head and Tail Descriptor Pointers */
845 IXGB_WRITE_REG(hw
, RDH
, 0);
846 IXGB_WRITE_REG(hw
, RDT
, 0);
848 /* set up pre-fetching of receive buffers so we get some before we
849 * run out (default hardware behavior is to run out before fetching
850 * more). This sets up to fetch if HTHRESH rx descriptors are avail
851 * and the descriptors in hw cache are below PTHRESH. This avoids
852 * the hardware behavior of fetching <=512 descriptors in a single
853 * burst that pre-empts all other activity, usually causing fifo
855 /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
856 rxdctl
= RXDCTL_WTHRESH_DEFAULT
<< IXGB_RXDCTL_WTHRESH_SHIFT
|
857 RXDCTL_HTHRESH_DEFAULT
<< IXGB_RXDCTL_HTHRESH_SHIFT
|
858 RXDCTL_PTHRESH_DEFAULT
<< IXGB_RXDCTL_PTHRESH_SHIFT
;
859 IXGB_WRITE_REG(hw
, RXDCTL
, rxdctl
);
861 /* Enable Receive Checksum Offload for TCP and UDP */
862 if(adapter
->rx_csum
== TRUE
) {
863 rxcsum
= IXGB_READ_REG(hw
, RXCSUM
);
864 rxcsum
|= IXGB_RXCSUM_TUOFL
;
865 IXGB_WRITE_REG(hw
, RXCSUM
, rxcsum
);
868 /* Enable Receives */
870 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
874 * ixgb_free_tx_resources - Free Tx Resources
875 * @adapter: board private structure
877 * Free all transmit software resources
881 ixgb_free_tx_resources(struct ixgb_adapter
*adapter
)
883 struct pci_dev
*pdev
= adapter
->pdev
;
885 ixgb_clean_tx_ring(adapter
);
887 vfree(adapter
->tx_ring
.buffer_info
);
888 adapter
->tx_ring
.buffer_info
= NULL
;
890 pci_free_consistent(pdev
, adapter
->tx_ring
.size
,
891 adapter
->tx_ring
.desc
, adapter
->tx_ring
.dma
);
893 adapter
->tx_ring
.desc
= NULL
;
897 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter
*adapter
,
898 struct ixgb_buffer
*buffer_info
)
900 struct pci_dev
*pdev
= adapter
->pdev
;
901 if(buffer_info
->dma
) {
906 buffer_info
->dma
= 0;
908 if(buffer_info
->skb
) {
909 dev_kfree_skb_any(buffer_info
->skb
);
910 buffer_info
->skb
= NULL
;
915 * ixgb_clean_tx_ring - Free Tx Buffers
916 * @adapter: board private structure
920 ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
)
922 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
923 struct ixgb_buffer
*buffer_info
;
927 /* Free all the Tx ring sk_buffs */
929 for(i
= 0; i
< tx_ring
->count
; i
++) {
930 buffer_info
= &tx_ring
->buffer_info
[i
];
931 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
934 size
= sizeof(struct ixgb_buffer
) * tx_ring
->count
;
935 memset(tx_ring
->buffer_info
, 0, size
);
937 /* Zero out the descriptor ring */
939 memset(tx_ring
->desc
, 0, tx_ring
->size
);
941 tx_ring
->next_to_use
= 0;
942 tx_ring
->next_to_clean
= 0;
944 IXGB_WRITE_REG(&adapter
->hw
, TDH
, 0);
945 IXGB_WRITE_REG(&adapter
->hw
, TDT
, 0);
949 * ixgb_free_rx_resources - Free Rx Resources
950 * @adapter: board private structure
952 * Free all receive software resources
956 ixgb_free_rx_resources(struct ixgb_adapter
*adapter
)
958 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
959 struct pci_dev
*pdev
= adapter
->pdev
;
961 ixgb_clean_rx_ring(adapter
);
963 vfree(rx_ring
->buffer_info
);
964 rx_ring
->buffer_info
= NULL
;
966 pci_free_consistent(pdev
, rx_ring
->size
, rx_ring
->desc
, rx_ring
->dma
);
968 rx_ring
->desc
= NULL
;
972 * ixgb_clean_rx_ring - Free Rx Buffers
973 * @adapter: board private structure
977 ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
)
979 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
980 struct ixgb_buffer
*buffer_info
;
981 struct pci_dev
*pdev
= adapter
->pdev
;
985 /* Free all the Rx ring sk_buffs */
987 for(i
= 0; i
< rx_ring
->count
; i
++) {
988 buffer_info
= &rx_ring
->buffer_info
[i
];
989 if(buffer_info
->skb
) {
991 pci_unmap_single(pdev
,
996 dev_kfree_skb(buffer_info
->skb
);
998 buffer_info
->skb
= NULL
;
1002 size
= sizeof(struct ixgb_buffer
) * rx_ring
->count
;
1003 memset(rx_ring
->buffer_info
, 0, size
);
1005 /* Zero out the descriptor ring */
1007 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1009 rx_ring
->next_to_clean
= 0;
1010 rx_ring
->next_to_use
= 0;
1012 IXGB_WRITE_REG(&adapter
->hw
, RDH
, 0);
1013 IXGB_WRITE_REG(&adapter
->hw
, RDT
, 0);
1017 * ixgb_set_mac - Change the Ethernet Address of the NIC
1018 * @netdev: network interface device structure
1019 * @p: pointer to an address structure
1021 * Returns 0 on success, negative on failure
1025 ixgb_set_mac(struct net_device
*netdev
, void *p
)
1027 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1028 struct sockaddr
*addr
= p
;
1030 if(!is_valid_ether_addr(addr
->sa_data
))
1031 return -EADDRNOTAVAIL
;
1033 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1035 ixgb_rar_set(&adapter
->hw
, addr
->sa_data
, 0);
1041 * ixgb_set_multi - Multicast and Promiscuous mode set
1042 * @netdev: network interface device structure
1044 * The set_multi entry point is called whenever the multicast address
1045 * list or the network interface flags are updated. This routine is
1046 * responsible for configuring the hardware for proper multicast,
1047 * promiscuous mode, and all-multi behavior.
1051 ixgb_set_multi(struct net_device
*netdev
)
1053 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1054 struct ixgb_hw
*hw
= &adapter
->hw
;
1055 struct dev_mc_list
*mc_ptr
;
1059 /* Check for Promiscuous and All Multicast modes */
1061 rctl
= IXGB_READ_REG(hw
, RCTL
);
1063 if(netdev
->flags
& IFF_PROMISC
) {
1064 rctl
|= (IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1065 } else if(netdev
->flags
& IFF_ALLMULTI
) {
1066 rctl
|= IXGB_RCTL_MPE
;
1067 rctl
&= ~IXGB_RCTL_UPE
;
1069 rctl
&= ~(IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1072 if(netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
) {
1073 rctl
|= IXGB_RCTL_MPE
;
1074 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1076 uint8_t mta
[netdev
->mc_count
* IXGB_ETH_LENGTH_OF_ADDRESS
];
1078 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1080 for(i
= 0, mc_ptr
= netdev
->mc_list
; mc_ptr
;
1081 i
++, mc_ptr
= mc_ptr
->next
)
1082 memcpy(&mta
[i
* IXGB_ETH_LENGTH_OF_ADDRESS
],
1083 mc_ptr
->dmi_addr
, IXGB_ETH_LENGTH_OF_ADDRESS
);
1085 ixgb_mc_addr_list_update(hw
, mta
, netdev
->mc_count
, 0);
1090 * ixgb_watchdog - Timer Call-back
1091 * @data: pointer to netdev cast into an unsigned long
1095 ixgb_watchdog(unsigned long data
)
1097 struct ixgb_adapter
*adapter
= (struct ixgb_adapter
*)data
;
1098 struct net_device
*netdev
= adapter
->netdev
;
1099 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
1101 ixgb_check_for_link(&adapter
->hw
);
1103 if (ixgb_check_for_bad_link(&adapter
->hw
)) {
1104 /* force the reset path */
1105 netif_stop_queue(netdev
);
1108 if(adapter
->hw
.link_up
) {
1109 if(!netif_carrier_ok(netdev
)) {
1110 printk(KERN_INFO
"ixgb: %s NIC Link is Up %d Mbps %s\n",
1111 netdev
->name
, 10000, "Full Duplex");
1112 adapter
->link_speed
= 10000;
1113 adapter
->link_duplex
= FULL_DUPLEX
;
1114 netif_carrier_on(netdev
);
1115 netif_wake_queue(netdev
);
1118 if(netif_carrier_ok(netdev
)) {
1119 adapter
->link_speed
= 0;
1120 adapter
->link_duplex
= 0;
1122 "ixgb: %s NIC Link is Down\n",
1124 netif_carrier_off(netdev
);
1125 netif_stop_queue(netdev
);
1130 ixgb_update_stats(adapter
);
1132 if(!netif_carrier_ok(netdev
)) {
1133 if(IXGB_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
1134 /* We've lost link, so the controller stops DMA,
1135 * but we've got queued Tx work that's never going
1136 * to get done, so reset controller to flush Tx.
1137 * (Do the reset outside of interrupt context). */
1138 schedule_work(&adapter
->tx_timeout_task
);
1142 /* Force detection of hung controller every watchdog period */
1143 adapter
->detect_tx_hung
= TRUE
;
1145 /* generate an interrupt to force clean up of any stragglers */
1146 IXGB_WRITE_REG(&adapter
->hw
, ICS
, IXGB_INT_TXDW
);
1148 /* Reset the timer */
1149 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 2 * HZ
);
1152 #define IXGB_TX_FLAGS_CSUM 0x00000001
1153 #define IXGB_TX_FLAGS_VLAN 0x00000002
1154 #define IXGB_TX_FLAGS_TSO 0x00000004
1157 ixgb_tso(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1160 struct ixgb_context_desc
*context_desc
;
1162 uint8_t ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
1163 uint16_t ipcse
, tucse
, mss
;
1166 if(likely(skb_shinfo(skb
)->tso_size
)) {
1167 if (skb_header_cloned(skb
)) {
1168 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
1173 hdr_len
= ((skb
->h
.raw
- skb
->data
) + (skb
->h
.th
->doff
<< 2));
1174 mss
= skb_shinfo(skb
)->tso_size
;
1175 skb
->nh
.iph
->tot_len
= 0;
1176 skb
->nh
.iph
->check
= 0;
1177 skb
->h
.th
->check
= ~csum_tcpudp_magic(skb
->nh
.iph
->saddr
,
1180 ipcss
= skb
->nh
.raw
- skb
->data
;
1181 ipcso
= (void *)&(skb
->nh
.iph
->check
) - (void *)skb
->data
;
1182 ipcse
= skb
->h
.raw
- skb
->data
- 1;
1183 tucss
= skb
->h
.raw
- skb
->data
;
1184 tucso
= (void *)&(skb
->h
.th
->check
) - (void *)skb
->data
;
1187 i
= adapter
->tx_ring
.next_to_use
;
1188 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1190 context_desc
->ipcss
= ipcss
;
1191 context_desc
->ipcso
= ipcso
;
1192 context_desc
->ipcse
= cpu_to_le16(ipcse
);
1193 context_desc
->tucss
= tucss
;
1194 context_desc
->tucso
= tucso
;
1195 context_desc
->tucse
= cpu_to_le16(tucse
);
1196 context_desc
->mss
= cpu_to_le16(mss
);
1197 context_desc
->hdr_len
= hdr_len
;
1198 context_desc
->status
= 0;
1199 context_desc
->cmd_type_len
= cpu_to_le32(
1200 IXGB_CONTEXT_DESC_TYPE
1201 | IXGB_CONTEXT_DESC_CMD_TSE
1202 | IXGB_CONTEXT_DESC_CMD_IP
1203 | IXGB_CONTEXT_DESC_CMD_TCP
1204 | IXGB_CONTEXT_DESC_CMD_IDE
1205 | (skb
->len
- (hdr_len
)));
1208 if(++i
== adapter
->tx_ring
.count
) i
= 0;
1209 adapter
->tx_ring
.next_to_use
= i
;
1218 static inline boolean_t
1219 ixgb_tx_csum(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1221 struct ixgb_context_desc
*context_desc
;
1225 if(likely(skb
->ip_summed
== CHECKSUM_HW
)) {
1226 css
= skb
->h
.raw
- skb
->data
;
1227 cso
= (skb
->h
.raw
+ skb
->csum
) - skb
->data
;
1229 i
= adapter
->tx_ring
.next_to_use
;
1230 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1232 context_desc
->tucss
= css
;
1233 context_desc
->tucso
= cso
;
1234 context_desc
->tucse
= 0;
1235 /* zero out any previously existing data in one instruction */
1236 *(uint32_t *)&(context_desc
->ipcss
) = 0;
1237 context_desc
->status
= 0;
1238 context_desc
->hdr_len
= 0;
1239 context_desc
->mss
= 0;
1240 context_desc
->cmd_type_len
=
1241 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1242 | IXGB_TX_DESC_CMD_IDE
);
1244 if(++i
== adapter
->tx_ring
.count
) i
= 0;
1245 adapter
->tx_ring
.next_to_use
= i
;
1253 #define IXGB_MAX_TXD_PWR 14
1254 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1257 ixgb_tx_map(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
,
1260 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1261 struct ixgb_buffer
*buffer_info
;
1263 unsigned int offset
= 0, size
, count
= 0, i
;
1265 unsigned int nr_frags
= skb_shinfo(skb
)->nr_frags
;
1268 len
-= skb
->data_len
;
1270 i
= tx_ring
->next_to_use
;
1273 buffer_info
= &tx_ring
->buffer_info
[i
];
1274 size
= min(len
, IXGB_MAX_JUMBO_FRAME_SIZE
);
1275 buffer_info
->length
= size
;
1277 pci_map_single(adapter
->pdev
,
1281 buffer_info
->time_stamp
= jiffies
;
1286 if(++i
== tx_ring
->count
) i
= 0;
1289 for(f
= 0; f
< nr_frags
; f
++) {
1290 struct skb_frag_struct
*frag
;
1292 frag
= &skb_shinfo(skb
)->frags
[f
];
1297 buffer_info
= &tx_ring
->buffer_info
[i
];
1298 size
= min(len
, IXGB_MAX_JUMBO_FRAME_SIZE
);
1299 buffer_info
->length
= size
;
1301 pci_map_page(adapter
->pdev
,
1303 frag
->page_offset
+ offset
,
1306 buffer_info
->time_stamp
= jiffies
;
1311 if(++i
== tx_ring
->count
) i
= 0;
1314 i
= (i
== 0) ? tx_ring
->count
- 1 : i
- 1;
1315 tx_ring
->buffer_info
[i
].skb
= skb
;
1316 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
1322 ixgb_tx_queue(struct ixgb_adapter
*adapter
, int count
, int vlan_id
,int tx_flags
)
1324 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1325 struct ixgb_tx_desc
*tx_desc
= NULL
;
1326 struct ixgb_buffer
*buffer_info
;
1327 uint32_t cmd_type_len
= adapter
->tx_cmd_type
;
1332 if(tx_flags
& IXGB_TX_FLAGS_TSO
) {
1333 cmd_type_len
|= IXGB_TX_DESC_CMD_TSE
;
1334 popts
|= (IXGB_TX_DESC_POPTS_IXSM
| IXGB_TX_DESC_POPTS_TXSM
);
1337 if(tx_flags
& IXGB_TX_FLAGS_CSUM
)
1338 popts
|= IXGB_TX_DESC_POPTS_TXSM
;
1340 if(tx_flags
& IXGB_TX_FLAGS_VLAN
) {
1341 cmd_type_len
|= IXGB_TX_DESC_CMD_VLE
;
1344 i
= tx_ring
->next_to_use
;
1347 buffer_info
= &tx_ring
->buffer_info
[i
];
1348 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1349 tx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
1350 tx_desc
->cmd_type_len
=
1351 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
1352 tx_desc
->status
= status
;
1353 tx_desc
->popts
= popts
;
1354 tx_desc
->vlan
= cpu_to_le16(vlan_id
);
1356 if(++i
== tx_ring
->count
) i
= 0;
1359 tx_desc
->cmd_type_len
|= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1360 | IXGB_TX_DESC_CMD_RS
);
1362 /* Force memory writes to complete before letting h/w
1363 * know there are new descriptors to fetch. (Only
1364 * applicable for weak-ordered memory model archs,
1365 * such as IA-64). */
1368 tx_ring
->next_to_use
= i
;
1369 IXGB_WRITE_REG(&adapter
->hw
, TDT
, i
);
1372 /* Tx Descriptors needed, worst case */
1373 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1374 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1375 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) + \
1376 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1
1379 ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
1381 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1383 unsigned int tx_flags
= 0;
1384 unsigned long flags
;
1389 dev_kfree_skb_any(skb
);
1393 spin_lock_irqsave(&adapter
->tx_lock
, flags
);
1394 if(unlikely(IXGB_DESC_UNUSED(&adapter
->tx_ring
) < DESC_NEEDED
)) {
1395 netif_stop_queue(netdev
);
1396 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1399 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1401 if(adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
1402 tx_flags
|= IXGB_TX_FLAGS_VLAN
;
1403 vlan_id
= vlan_tx_tag_get(skb
);
1406 first
= adapter
->tx_ring
.next_to_use
;
1408 tso
= ixgb_tso(adapter
, skb
);
1410 dev_kfree_skb_any(skb
);
1411 return NETDEV_TX_OK
;
1415 tx_flags
|= IXGB_TX_FLAGS_TSO
;
1416 else if(ixgb_tx_csum(adapter
, skb
))
1417 tx_flags
|= IXGB_TX_FLAGS_CSUM
;
1419 ixgb_tx_queue(adapter
, ixgb_tx_map(adapter
, skb
, first
), vlan_id
,
1422 netdev
->trans_start
= jiffies
;
1428 * ixgb_tx_timeout - Respond to a Tx Hang
1429 * @netdev: network interface device structure
1433 ixgb_tx_timeout(struct net_device
*netdev
)
1435 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1437 /* Do the reset outside of interrupt context */
1438 schedule_work(&adapter
->tx_timeout_task
);
1442 ixgb_tx_timeout_task(struct net_device
*netdev
)
1444 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1446 ixgb_down(adapter
, TRUE
);
1451 * ixgb_get_stats - Get System Network Statistics
1452 * @netdev: network interface device structure
1454 * Returns the address of the device statistics structure.
1455 * The statistics are actually updated from the timer callback.
1458 static struct net_device_stats
*
1459 ixgb_get_stats(struct net_device
*netdev
)
1461 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1463 return &adapter
->net_stats
;
1467 * ixgb_change_mtu - Change the Maximum Transfer Unit
1468 * @netdev: network interface device structure
1469 * @new_mtu: new value for maximum frame size
1471 * Returns 0 on success, negative on failure
1475 ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
)
1477 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1478 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1479 int old_max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1482 if((max_frame
< IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
)
1483 || (max_frame
> IXGB_MAX_JUMBO_FRAME_SIZE
+ ENET_FCS_LENGTH
)) {
1484 IXGB_ERR("Invalid MTU setting\n");
1488 if((max_frame
<= IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
)
1489 || (max_frame
<= IXGB_RXBUFFER_2048
)) {
1490 adapter
->rx_buffer_len
= IXGB_RXBUFFER_2048
;
1492 } else if(max_frame
<= IXGB_RXBUFFER_4096
) {
1493 adapter
->rx_buffer_len
= IXGB_RXBUFFER_4096
;
1495 } else if(max_frame
<= IXGB_RXBUFFER_8192
) {
1496 adapter
->rx_buffer_len
= IXGB_RXBUFFER_8192
;
1499 adapter
->rx_buffer_len
= IXGB_RXBUFFER_16384
;
1502 netdev
->mtu
= new_mtu
;
1504 if(old_max_frame
!= max_frame
&& netif_running(netdev
)) {
1506 ixgb_down(adapter
, TRUE
);
1514 * ixgb_update_stats - Update the board statistics counters.
1515 * @adapter: board private structure
1519 ixgb_update_stats(struct ixgb_adapter
*adapter
)
1521 struct net_device
*netdev
= adapter
->netdev
;
1523 if((netdev
->flags
& IFF_PROMISC
) || (netdev
->flags
& IFF_ALLMULTI
) ||
1524 (netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
)) {
1525 u64 multi
= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1526 u32 bcast_l
= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1527 u32 bcast_h
= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1528 u64 bcast
= ((u64
)bcast_h
<< 32) | bcast_l
;
1530 multi
|= ((u64
)IXGB_READ_REG(&adapter
->hw
, MPRCH
) << 32);
1531 /* fix up multicast stats by removing broadcasts */
1535 adapter
->stats
.mprcl
+= (multi
& 0xFFFFFFFF);
1536 adapter
->stats
.mprch
+= (multi
>> 32);
1537 adapter
->stats
.bprcl
+= bcast_l
;
1538 adapter
->stats
.bprch
+= bcast_h
;
1540 adapter
->stats
.mprcl
+= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1541 adapter
->stats
.mprch
+= IXGB_READ_REG(&adapter
->hw
, MPRCH
);
1542 adapter
->stats
.bprcl
+= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1543 adapter
->stats
.bprch
+= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1545 adapter
->stats
.tprl
+= IXGB_READ_REG(&adapter
->hw
, TPRL
);
1546 adapter
->stats
.tprh
+= IXGB_READ_REG(&adapter
->hw
, TPRH
);
1547 adapter
->stats
.gprcl
+= IXGB_READ_REG(&adapter
->hw
, GPRCL
);
1548 adapter
->stats
.gprch
+= IXGB_READ_REG(&adapter
->hw
, GPRCH
);
1549 adapter
->stats
.uprcl
+= IXGB_READ_REG(&adapter
->hw
, UPRCL
);
1550 adapter
->stats
.uprch
+= IXGB_READ_REG(&adapter
->hw
, UPRCH
);
1551 adapter
->stats
.vprcl
+= IXGB_READ_REG(&adapter
->hw
, VPRCL
);
1552 adapter
->stats
.vprch
+= IXGB_READ_REG(&adapter
->hw
, VPRCH
);
1553 adapter
->stats
.jprcl
+= IXGB_READ_REG(&adapter
->hw
, JPRCL
);
1554 adapter
->stats
.jprch
+= IXGB_READ_REG(&adapter
->hw
, JPRCH
);
1555 adapter
->stats
.gorcl
+= IXGB_READ_REG(&adapter
->hw
, GORCL
);
1556 adapter
->stats
.gorch
+= IXGB_READ_REG(&adapter
->hw
, GORCH
);
1557 adapter
->stats
.torl
+= IXGB_READ_REG(&adapter
->hw
, TORL
);
1558 adapter
->stats
.torh
+= IXGB_READ_REG(&adapter
->hw
, TORH
);
1559 adapter
->stats
.rnbc
+= IXGB_READ_REG(&adapter
->hw
, RNBC
);
1560 adapter
->stats
.ruc
+= IXGB_READ_REG(&adapter
->hw
, RUC
);
1561 adapter
->stats
.roc
+= IXGB_READ_REG(&adapter
->hw
, ROC
);
1562 adapter
->stats
.rlec
+= IXGB_READ_REG(&adapter
->hw
, RLEC
);
1563 adapter
->stats
.crcerrs
+= IXGB_READ_REG(&adapter
->hw
, CRCERRS
);
1564 adapter
->stats
.icbc
+= IXGB_READ_REG(&adapter
->hw
, ICBC
);
1565 adapter
->stats
.ecbc
+= IXGB_READ_REG(&adapter
->hw
, ECBC
);
1566 adapter
->stats
.mpc
+= IXGB_READ_REG(&adapter
->hw
, MPC
);
1567 adapter
->stats
.tptl
+= IXGB_READ_REG(&adapter
->hw
, TPTL
);
1568 adapter
->stats
.tpth
+= IXGB_READ_REG(&adapter
->hw
, TPTH
);
1569 adapter
->stats
.gptcl
+= IXGB_READ_REG(&adapter
->hw
, GPTCL
);
1570 adapter
->stats
.gptch
+= IXGB_READ_REG(&adapter
->hw
, GPTCH
);
1571 adapter
->stats
.bptcl
+= IXGB_READ_REG(&adapter
->hw
, BPTCL
);
1572 adapter
->stats
.bptch
+= IXGB_READ_REG(&adapter
->hw
, BPTCH
);
1573 adapter
->stats
.mptcl
+= IXGB_READ_REG(&adapter
->hw
, MPTCL
);
1574 adapter
->stats
.mptch
+= IXGB_READ_REG(&adapter
->hw
, MPTCH
);
1575 adapter
->stats
.uptcl
+= IXGB_READ_REG(&adapter
->hw
, UPTCL
);
1576 adapter
->stats
.uptch
+= IXGB_READ_REG(&adapter
->hw
, UPTCH
);
1577 adapter
->stats
.vptcl
+= IXGB_READ_REG(&adapter
->hw
, VPTCL
);
1578 adapter
->stats
.vptch
+= IXGB_READ_REG(&adapter
->hw
, VPTCH
);
1579 adapter
->stats
.jptcl
+= IXGB_READ_REG(&adapter
->hw
, JPTCL
);
1580 adapter
->stats
.jptch
+= IXGB_READ_REG(&adapter
->hw
, JPTCH
);
1581 adapter
->stats
.gotcl
+= IXGB_READ_REG(&adapter
->hw
, GOTCL
);
1582 adapter
->stats
.gotch
+= IXGB_READ_REG(&adapter
->hw
, GOTCH
);
1583 adapter
->stats
.totl
+= IXGB_READ_REG(&adapter
->hw
, TOTL
);
1584 adapter
->stats
.toth
+= IXGB_READ_REG(&adapter
->hw
, TOTH
);
1585 adapter
->stats
.dc
+= IXGB_READ_REG(&adapter
->hw
, DC
);
1586 adapter
->stats
.plt64c
+= IXGB_READ_REG(&adapter
->hw
, PLT64C
);
1587 adapter
->stats
.tsctc
+= IXGB_READ_REG(&adapter
->hw
, TSCTC
);
1588 adapter
->stats
.tsctfc
+= IXGB_READ_REG(&adapter
->hw
, TSCTFC
);
1589 adapter
->stats
.ibic
+= IXGB_READ_REG(&adapter
->hw
, IBIC
);
1590 adapter
->stats
.rfc
+= IXGB_READ_REG(&adapter
->hw
, RFC
);
1591 adapter
->stats
.lfc
+= IXGB_READ_REG(&adapter
->hw
, LFC
);
1592 adapter
->stats
.pfrc
+= IXGB_READ_REG(&adapter
->hw
, PFRC
);
1593 adapter
->stats
.pftc
+= IXGB_READ_REG(&adapter
->hw
, PFTC
);
1594 adapter
->stats
.mcfrc
+= IXGB_READ_REG(&adapter
->hw
, MCFRC
);
1595 adapter
->stats
.mcftc
+= IXGB_READ_REG(&adapter
->hw
, MCFTC
);
1596 adapter
->stats
.xonrxc
+= IXGB_READ_REG(&adapter
->hw
, XONRXC
);
1597 adapter
->stats
.xontxc
+= IXGB_READ_REG(&adapter
->hw
, XONTXC
);
1598 adapter
->stats
.xoffrxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFRXC
);
1599 adapter
->stats
.xofftxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFTXC
);
1600 adapter
->stats
.rjc
+= IXGB_READ_REG(&adapter
->hw
, RJC
);
1602 /* Fill out the OS statistics structure */
1604 adapter
->net_stats
.rx_packets
= adapter
->stats
.gprcl
;
1605 adapter
->net_stats
.tx_packets
= adapter
->stats
.gptcl
;
1606 adapter
->net_stats
.rx_bytes
= adapter
->stats
.gorcl
;
1607 adapter
->net_stats
.tx_bytes
= adapter
->stats
.gotcl
;
1608 adapter
->net_stats
.multicast
= adapter
->stats
.mprcl
;
1609 adapter
->net_stats
.collisions
= 0;
1611 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1612 * with a length in the type/len field */
1613 adapter
->net_stats
.rx_errors
=
1614 /* adapter->stats.rnbc + */ adapter
->stats
.crcerrs
+
1615 adapter
->stats
.ruc
+
1616 adapter
->stats
.roc
/*+ adapter->stats.rlec */ +
1617 adapter
->stats
.icbc
+
1618 adapter
->stats
.ecbc
+ adapter
->stats
.mpc
;
1621 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1624 adapter
->net_stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
1625 adapter
->net_stats
.rx_fifo_errors
= adapter
->stats
.mpc
;
1626 adapter
->net_stats
.rx_missed_errors
= adapter
->stats
.mpc
;
1627 adapter
->net_stats
.rx_over_errors
= adapter
->stats
.mpc
;
1629 adapter
->net_stats
.tx_errors
= 0;
1630 adapter
->net_stats
.rx_frame_errors
= 0;
1631 adapter
->net_stats
.tx_aborted_errors
= 0;
1632 adapter
->net_stats
.tx_carrier_errors
= 0;
1633 adapter
->net_stats
.tx_fifo_errors
= 0;
1634 adapter
->net_stats
.tx_heartbeat_errors
= 0;
1635 adapter
->net_stats
.tx_window_errors
= 0;
1638 #define IXGB_MAX_INTR 10
1640 * ixgb_intr - Interrupt Handler
1641 * @irq: interrupt number
1642 * @data: pointer to a network interface device structure
1643 * @pt_regs: CPU registers structure
1647 ixgb_intr(int irq
, void *data
, struct pt_regs
*regs
)
1649 struct net_device
*netdev
= data
;
1650 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1651 struct ixgb_hw
*hw
= &adapter
->hw
;
1652 uint32_t icr
= IXGB_READ_REG(hw
, ICR
);
1653 #ifndef CONFIG_IXGB_NAPI
1658 return IRQ_NONE
; /* Not our interrupt */
1660 if(unlikely(icr
& (IXGB_INT_RXSEQ
| IXGB_INT_LSC
))) {
1661 mod_timer(&adapter
->watchdog_timer
, jiffies
);
1664 #ifdef CONFIG_IXGB_NAPI
1665 if(netif_rx_schedule_prep(netdev
)) {
1667 /* Disable interrupts and register for poll. The flush
1668 of the posted write is intentionally left out.
1671 atomic_inc(&adapter
->irq_sem
);
1672 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
1673 __netif_rx_schedule(netdev
);
1676 /* yes, that is actually a & and it is meant to make sure that
1677 * every pass through this for loop checks both receive and
1678 * transmit queues for completed descriptors, intended to
1679 * avoid starvation issues and assist tx/rx fairness. */
1680 for(i
= 0; i
< IXGB_MAX_INTR
; i
++)
1681 if(!ixgb_clean_rx_irq(adapter
) &
1682 !ixgb_clean_tx_irq(adapter
))
1688 #ifdef CONFIG_IXGB_NAPI
1690 * ixgb_clean - NAPI Rx polling callback
1691 * @adapter: board private structure
1695 ixgb_clean(struct net_device
*netdev
, int *budget
)
1697 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1698 int work_to_do
= min(*budget
, netdev
->quota
);
1702 tx_cleaned
= ixgb_clean_tx_irq(adapter
);
1703 ixgb_clean_rx_irq(adapter
, &work_done
, work_to_do
);
1705 *budget
-= work_done
;
1706 netdev
->quota
-= work_done
;
1708 /* if no Tx and not enough Rx work done, exit the polling mode */
1709 if((!tx_cleaned
&& (work_done
== 0)) || !netif_running(netdev
)) {
1710 netif_rx_complete(netdev
);
1711 ixgb_irq_enable(adapter
);
1720 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1721 * @adapter: board private structure
1725 ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
)
1727 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1728 struct net_device
*netdev
= adapter
->netdev
;
1729 struct ixgb_tx_desc
*tx_desc
, *eop_desc
;
1730 struct ixgb_buffer
*buffer_info
;
1731 unsigned int i
, eop
;
1732 boolean_t cleaned
= FALSE
;
1734 i
= tx_ring
->next_to_clean
;
1735 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1736 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1738 while(eop_desc
->status
& IXGB_TX_DESC_STATUS_DD
) {
1740 for(cleaned
= FALSE
; !cleaned
; ) {
1741 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1742 buffer_info
= &tx_ring
->buffer_info
[i
];
1745 & (IXGB_TX_DESC_POPTS_TXSM
|
1746 IXGB_TX_DESC_POPTS_IXSM
))
1747 adapter
->hw_csum_tx_good
++;
1749 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
1751 *(uint32_t *)&(tx_desc
->status
) = 0;
1753 cleaned
= (i
== eop
);
1754 if(++i
== tx_ring
->count
) i
= 0;
1757 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1758 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1761 tx_ring
->next_to_clean
= i
;
1763 spin_lock(&adapter
->tx_lock
);
1764 if(cleaned
&& netif_queue_stopped(netdev
) && netif_carrier_ok(netdev
) &&
1765 (IXGB_DESC_UNUSED(tx_ring
) > IXGB_TX_QUEUE_WAKE
)) {
1767 netif_wake_queue(netdev
);
1769 spin_unlock(&adapter
->tx_lock
);
1771 if(adapter
->detect_tx_hung
) {
1772 /* detect a transmit hang in hardware, this serializes the
1773 * check with the clearing of time_stamp and movement of i */
1774 adapter
->detect_tx_hung
= FALSE
;
1775 if(tx_ring
->buffer_info
[i
].dma
&&
1776 time_after(jiffies
, tx_ring
->buffer_info
[i
].time_stamp
+ HZ
)
1777 && !(IXGB_READ_REG(&adapter
->hw
, STATUS
) &
1779 netif_stop_queue(netdev
);
1786 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1787 * @adapter: board private structure
1788 * @rx_desc: receive descriptor
1789 * @sk_buff: socket buffer with received data
1793 ixgb_rx_checksum(struct ixgb_adapter
*adapter
,
1794 struct ixgb_rx_desc
*rx_desc
,
1795 struct sk_buff
*skb
)
1797 /* Ignore Checksum bit is set OR
1798 * TCP Checksum has not been calculated
1800 if((rx_desc
->status
& IXGB_RX_DESC_STATUS_IXSM
) ||
1801 (!(rx_desc
->status
& IXGB_RX_DESC_STATUS_TCPCS
))) {
1802 skb
->ip_summed
= CHECKSUM_NONE
;
1806 /* At this point we know the hardware did the TCP checksum */
1807 /* now look at the TCP checksum error bit */
1808 if(rx_desc
->errors
& IXGB_RX_DESC_ERRORS_TCPE
) {
1809 /* let the stack verify checksum errors */
1810 skb
->ip_summed
= CHECKSUM_NONE
;
1811 adapter
->hw_csum_rx_error
++;
1813 /* TCP checksum is good */
1814 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1815 adapter
->hw_csum_rx_good
++;
1820 * ixgb_clean_rx_irq - Send received data up the network stack,
1821 * @adapter: board private structure
1825 #ifdef CONFIG_IXGB_NAPI
1826 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
, int *work_done
, int work_to_do
)
1828 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
)
1831 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1832 struct net_device
*netdev
= adapter
->netdev
;
1833 struct pci_dev
*pdev
= adapter
->pdev
;
1834 struct ixgb_rx_desc
*rx_desc
, *next_rxd
;
1835 struct ixgb_buffer
*buffer_info
, *next_buffer
, *next2_buffer
;
1838 boolean_t cleaned
= FALSE
;
1840 i
= rx_ring
->next_to_clean
;
1841 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
1842 buffer_info
= &rx_ring
->buffer_info
[i
];
1844 while(rx_desc
->status
& IXGB_RX_DESC_STATUS_DD
) {
1845 struct sk_buff
*skb
, *next_skb
;
1848 #ifdef CONFIG_IXGB_NAPI
1849 if(*work_done
>= work_to_do
)
1854 status
= rx_desc
->status
;
1855 skb
= buffer_info
->skb
;
1857 prefetch(skb
->data
);
1859 if(++i
== rx_ring
->count
) i
= 0;
1860 next_rxd
= IXGB_RX_DESC(*rx_ring
, i
);
1863 if((j
= i
+ 1) == rx_ring
->count
) j
= 0;
1864 next2_buffer
= &rx_ring
->buffer_info
[j
];
1865 prefetch(next2_buffer
);
1867 next_buffer
= &rx_ring
->buffer_info
[i
];
1868 next_skb
= next_buffer
->skb
;
1873 pci_unmap_single(pdev
,
1875 buffer_info
->length
,
1876 PCI_DMA_FROMDEVICE
);
1878 length
= le16_to_cpu(rx_desc
->length
);
1880 if(unlikely(!(status
& IXGB_RX_DESC_STATUS_EOP
))) {
1882 /* All receives must fit into a single buffer */
1884 IXGB_DBG("Receive packet consumed multiple buffers "
1885 "length<%x>\n", length
);
1887 dev_kfree_skb_irq(skb
);
1891 if (unlikely(rx_desc
->errors
1892 & (IXGB_RX_DESC_ERRORS_CE
| IXGB_RX_DESC_ERRORS_SE
1893 | IXGB_RX_DESC_ERRORS_P
|
1894 IXGB_RX_DESC_ERRORS_RXE
))) {
1896 dev_kfree_skb_irq(skb
);
1901 skb_put(skb
, length
);
1903 /* Receive Checksum Offload */
1904 ixgb_rx_checksum(adapter
, rx_desc
, skb
);
1906 skb
->protocol
= eth_type_trans(skb
, netdev
);
1907 #ifdef CONFIG_IXGB_NAPI
1908 if(adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
1909 vlan_hwaccel_receive_skb(skb
, adapter
->vlgrp
,
1910 le16_to_cpu(rx_desc
->special
) &
1911 IXGB_RX_DESC_SPECIAL_VLAN_MASK
);
1913 netif_receive_skb(skb
);
1915 #else /* CONFIG_IXGB_NAPI */
1916 if(adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
1917 vlan_hwaccel_rx(skb
, adapter
->vlgrp
,
1918 le16_to_cpu(rx_desc
->special
) &
1919 IXGB_RX_DESC_SPECIAL_VLAN_MASK
);
1923 #endif /* CONFIG_IXGB_NAPI */
1924 netdev
->last_rx
= jiffies
;
1927 /* clean up descriptor, might be written over by hw */
1928 rx_desc
->status
= 0;
1929 buffer_info
->skb
= NULL
;
1931 /* use prefetched values */
1933 buffer_info
= next_buffer
;
1936 rx_ring
->next_to_clean
= i
;
1938 ixgb_alloc_rx_buffers(adapter
);
1944 * ixgb_alloc_rx_buffers - Replace used receive buffers
1945 * @adapter: address of board private structure
1949 ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
)
1951 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1952 struct net_device
*netdev
= adapter
->netdev
;
1953 struct pci_dev
*pdev
= adapter
->pdev
;
1954 struct ixgb_rx_desc
*rx_desc
;
1955 struct ixgb_buffer
*buffer_info
;
1956 struct sk_buff
*skb
;
1958 int num_group_tail_writes
;
1961 i
= rx_ring
->next_to_use
;
1962 buffer_info
= &rx_ring
->buffer_info
[i
];
1963 cleancount
= IXGB_DESC_UNUSED(rx_ring
);
1965 num_group_tail_writes
= IXGB_RX_BUFFER_WRITE
;
1967 /* leave three descriptors unused */
1968 while(--cleancount
> 2) {
1969 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
1971 skb
= dev_alloc_skb(adapter
->rx_buffer_len
+ NET_IP_ALIGN
);
1973 if(unlikely(!skb
)) {
1974 /* Better luck next round */
1978 /* Make buffer alignment 2 beyond a 16 byte boundary
1979 * this will result in a 16 byte aligned IP header after
1980 * the 14 byte MAC header is removed
1982 skb_reserve(skb
, NET_IP_ALIGN
);
1986 buffer_info
->skb
= skb
;
1987 buffer_info
->length
= adapter
->rx_buffer_len
;
1989 pci_map_single(pdev
,
1991 adapter
->rx_buffer_len
,
1992 PCI_DMA_FROMDEVICE
);
1994 rx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
1995 /* guarantee DD bit not set now before h/w gets descriptor
1996 * this is the rest of the workaround for h/w double
1998 rx_desc
->status
= 0;
2000 if((i
& ~(num_group_tail_writes
- 1)) == i
) {
2001 /* Force memory writes to complete before letting h/w
2002 * know there are new descriptors to fetch. (Only
2003 * applicable for weak-ordered memory model archs,
2004 * such as IA-64). */
2007 IXGB_WRITE_REG(&adapter
->hw
, RDT
, i
);
2010 if(++i
== rx_ring
->count
) i
= 0;
2011 buffer_info
= &rx_ring
->buffer_info
[i
];
2014 rx_ring
->next_to_use
= i
;
2018 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2020 * @param netdev network interface device structure
2021 * @param grp indicates to enable or disable tagging/stripping
2024 ixgb_vlan_rx_register(struct net_device
*netdev
, struct vlan_group
*grp
)
2026 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2027 uint32_t ctrl
, rctl
;
2029 ixgb_irq_disable(adapter
);
2030 adapter
->vlgrp
= grp
;
2033 /* enable VLAN tag insert/strip */
2034 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2035 ctrl
|= IXGB_CTRL0_VME
;
2036 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2038 /* enable VLAN receive filtering */
2040 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2041 rctl
|= IXGB_RCTL_VFE
;
2042 rctl
&= ~IXGB_RCTL_CFIEN
;
2043 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2045 /* disable VLAN tag insert/strip */
2047 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2048 ctrl
&= ~IXGB_CTRL0_VME
;
2049 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2051 /* disable VLAN filtering */
2053 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2054 rctl
&= ~IXGB_RCTL_VFE
;
2055 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2058 ixgb_irq_enable(adapter
);
2062 ixgb_vlan_rx_add_vid(struct net_device
*netdev
, uint16_t vid
)
2064 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2065 uint32_t vfta
, index
;
2067 /* add VID to filter table */
2069 index
= (vid
>> 5) & 0x7F;
2070 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2071 vfta
|= (1 << (vid
& 0x1F));
2072 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2076 ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, uint16_t vid
)
2078 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2079 uint32_t vfta
, index
;
2081 ixgb_irq_disable(adapter
);
2084 adapter
->vlgrp
->vlan_devices
[vid
] = NULL
;
2086 ixgb_irq_enable(adapter
);
2088 /* remove VID from filter table*/
2090 index
= (vid
>> 5) & 0x7F;
2091 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2092 vfta
&= ~(1 << (vid
& 0x1F));
2093 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2097 ixgb_restore_vlan(struct ixgb_adapter
*adapter
)
2099 ixgb_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
2101 if(adapter
->vlgrp
) {
2103 for(vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
2104 if(!adapter
->vlgrp
->vlan_devices
[vid
])
2106 ixgb_vlan_rx_add_vid(adapter
->netdev
, vid
);
2111 #ifdef CONFIG_NET_POLL_CONTROLLER
2113 * Polling 'interrupt' - used by things like netconsole to send skbs
2114 * without having to re-enable interrupts. It's not called while
2115 * the interrupt routine is executing.
2118 static void ixgb_netpoll(struct net_device
*dev
)
2120 struct ixgb_adapter
*adapter
= dev
->priv
;
2122 disable_irq(adapter
->pdev
->irq
);
2123 ixgb_intr(adapter
->pdev
->irq
, dev
, NULL
);
2124 enable_irq(adapter
->pdev
->irq
);