1 /*******************************************************************************
3 Intel PRO/10GbE Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
31 char ixgb_driver_name
[] = "ixgb";
32 static char ixgb_driver_string
[] = "Intel(R) PRO/10GbE Network Driver";
34 #ifndef CONFIG_IXGB_NAPI
37 #define DRIVERNAPI "-NAPI"
39 #define DRV_VERSION "1.0.126-k4"DRIVERNAPI
40 const char ixgb_driver_version
[] = DRV_VERSION
;
41 static const char ixgb_copyright
[] = "Copyright (c) 1999-2006 Intel Corporation.";
43 #define IXGB_CB_LENGTH 256
44 static unsigned int copybreak __read_mostly
= IXGB_CB_LENGTH
;
45 module_param(copybreak
, uint
, 0644);
46 MODULE_PARM_DESC(copybreak
,
47 "Maximum size of packet that is copied to a new buffer on receive");
49 /* ixgb_pci_tbl - PCI Device ID Table
51 * Wildcard entries (PCI_ANY_ID) should come last
52 * Last entry must be all 0s
54 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
55 * Class, Class Mask, private data (not used) }
57 static struct pci_device_id ixgb_pci_tbl
[] = {
58 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX
,
59 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
60 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_CX4
,
61 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
62 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_SR
,
63 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
64 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_LR
,
65 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
67 /* required last entry */
71 MODULE_DEVICE_TABLE(pci
, ixgb_pci_tbl
);
73 /* Local Function Prototypes */
74 static int ixgb_init_module(void);
75 static void ixgb_exit_module(void);
76 static int ixgb_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
77 static void __devexit
ixgb_remove(struct pci_dev
*pdev
);
78 static int ixgb_sw_init(struct ixgb_adapter
*adapter
);
79 static int ixgb_open(struct net_device
*netdev
);
80 static int ixgb_close(struct net_device
*netdev
);
81 static void ixgb_configure_tx(struct ixgb_adapter
*adapter
);
82 static void ixgb_configure_rx(struct ixgb_adapter
*adapter
);
83 static void ixgb_setup_rctl(struct ixgb_adapter
*adapter
);
84 static void ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
);
85 static void ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
);
86 static void ixgb_set_multi(struct net_device
*netdev
);
87 static void ixgb_watchdog(unsigned long data
);
88 static int ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
);
89 static struct net_device_stats
*ixgb_get_stats(struct net_device
*netdev
);
90 static int ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
);
91 static int ixgb_set_mac(struct net_device
*netdev
, void *p
);
92 static irqreturn_t
ixgb_intr(int irq
, void *data
);
93 static bool ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
);
95 #ifdef CONFIG_IXGB_NAPI
96 static int ixgb_clean(struct napi_struct
*, int);
97 static bool ixgb_clean_rx_irq(struct ixgb_adapter
*, int *, int);
99 static bool ixgb_clean_rx_irq(struct ixgb_adapter
*);
101 static void ixgb_alloc_rx_buffers(struct ixgb_adapter
*, int);
103 static void ixgb_tx_timeout(struct net_device
*dev
);
104 static void ixgb_tx_timeout_task(struct work_struct
*work
);
106 static void ixgb_vlan_rx_register(struct net_device
*netdev
,
107 struct vlan_group
*grp
);
108 static void ixgb_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
);
109 static void ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
);
110 static void ixgb_restore_vlan(struct ixgb_adapter
*adapter
);
112 #ifdef CONFIG_NET_POLL_CONTROLLER
113 /* for netdump / net console */
114 static void ixgb_netpoll(struct net_device
*dev
);
117 static pci_ers_result_t
ixgb_io_error_detected (struct pci_dev
*pdev
,
118 enum pci_channel_state state
);
119 static pci_ers_result_t
ixgb_io_slot_reset (struct pci_dev
*pdev
);
120 static void ixgb_io_resume (struct pci_dev
*pdev
);
122 static struct pci_error_handlers ixgb_err_handler
= {
123 .error_detected
= ixgb_io_error_detected
,
124 .slot_reset
= ixgb_io_slot_reset
,
125 .resume
= ixgb_io_resume
,
128 static struct pci_driver ixgb_driver
= {
129 .name
= ixgb_driver_name
,
130 .id_table
= ixgb_pci_tbl
,
132 .remove
= __devexit_p(ixgb_remove
),
133 .err_handler
= &ixgb_err_handler
136 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
137 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
138 MODULE_LICENSE("GPL");
139 MODULE_VERSION(DRV_VERSION
);
141 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
142 static int debug
= DEFAULT_DEBUG_LEVEL_SHIFT
;
143 module_param(debug
, int, 0);
144 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
147 * ixgb_init_module - Driver Registration Routine
149 * ixgb_init_module is the first routine called when the driver is
150 * loaded. All it does is register with the PCI subsystem.
154 ixgb_init_module(void)
156 printk(KERN_INFO
"%s - version %s\n",
157 ixgb_driver_string
, ixgb_driver_version
);
159 printk(KERN_INFO
"%s\n", ixgb_copyright
);
161 return pci_register_driver(&ixgb_driver
);
164 module_init(ixgb_init_module
);
167 * ixgb_exit_module - Driver Exit Cleanup Routine
169 * ixgb_exit_module is called just before the driver is removed
174 ixgb_exit_module(void)
176 pci_unregister_driver(&ixgb_driver
);
179 module_exit(ixgb_exit_module
);
182 * ixgb_irq_disable - Mask off interrupt generation on the NIC
183 * @adapter: board private structure
187 ixgb_irq_disable(struct ixgb_adapter
*adapter
)
189 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
190 IXGB_WRITE_FLUSH(&adapter
->hw
);
191 synchronize_irq(adapter
->pdev
->irq
);
195 * ixgb_irq_enable - Enable default interrupt generation settings
196 * @adapter: board private structure
200 ixgb_irq_enable(struct ixgb_adapter
*adapter
)
202 u32 val
= IXGB_INT_RXT0
| IXGB_INT_RXDMT0
|
203 IXGB_INT_TXDW
| IXGB_INT_LSC
;
204 if (adapter
->hw
.subsystem_vendor_id
== SUN_SUBVENDOR_ID
)
205 val
|= IXGB_INT_GPI0
;
206 IXGB_WRITE_REG(&adapter
->hw
, IMS
, val
);
207 IXGB_WRITE_FLUSH(&adapter
->hw
);
211 ixgb_up(struct ixgb_adapter
*adapter
)
213 struct net_device
*netdev
= adapter
->netdev
;
214 int err
, irq_flags
= IRQF_SHARED
;
215 int max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
216 struct ixgb_hw
*hw
= &adapter
->hw
;
218 /* hardware has been reset, we need to reload some things */
220 ixgb_rar_set(hw
, netdev
->dev_addr
, 0);
221 ixgb_set_multi(netdev
);
223 ixgb_restore_vlan(adapter
);
225 ixgb_configure_tx(adapter
);
226 ixgb_setup_rctl(adapter
);
227 ixgb_configure_rx(adapter
);
228 ixgb_alloc_rx_buffers(adapter
, IXGB_DESC_UNUSED(&adapter
->rx_ring
));
230 /* disable interrupts and get the hardware into a known state */
231 IXGB_WRITE_REG(&adapter
->hw
, IMC
, 0xffffffff);
233 /* only enable MSI if bus is in PCI-X mode */
234 if (IXGB_READ_REG(&adapter
->hw
, STATUS
) & IXGB_STATUS_PCIX_MODE
) {
235 err
= pci_enable_msi(adapter
->pdev
);
237 adapter
->have_msi
= 1;
240 /* proceed to try to request regular interrupt */
243 err
= request_irq(adapter
->pdev
->irq
, &ixgb_intr
, irq_flags
,
244 netdev
->name
, netdev
);
246 if (adapter
->have_msi
)
247 pci_disable_msi(adapter
->pdev
);
249 "Unable to allocate interrupt Error: %d\n", err
);
253 if ((hw
->max_frame_size
!= max_frame
) ||
254 (hw
->max_frame_size
!=
255 (IXGB_READ_REG(hw
, MFS
) >> IXGB_MFS_SHIFT
))) {
257 hw
->max_frame_size
= max_frame
;
259 IXGB_WRITE_REG(hw
, MFS
, hw
->max_frame_size
<< IXGB_MFS_SHIFT
);
261 if (hw
->max_frame_size
>
262 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
) {
263 u32 ctrl0
= IXGB_READ_REG(hw
, CTRL0
);
265 if (!(ctrl0
& IXGB_CTRL0_JFE
)) {
266 ctrl0
|= IXGB_CTRL0_JFE
;
267 IXGB_WRITE_REG(hw
, CTRL0
, ctrl0
);
272 clear_bit(__IXGB_DOWN
, &adapter
->flags
);
274 #ifdef CONFIG_IXGB_NAPI
275 napi_enable(&adapter
->napi
);
277 ixgb_irq_enable(adapter
);
279 mod_timer(&adapter
->watchdog_timer
, jiffies
);
285 ixgb_down(struct ixgb_adapter
*adapter
, bool kill_watchdog
)
287 struct net_device
*netdev
= adapter
->netdev
;
289 /* prevent the interrupt handler from restarting watchdog */
290 set_bit(__IXGB_DOWN
, &adapter
->flags
);
292 #ifdef CONFIG_IXGB_NAPI
293 napi_disable(&adapter
->napi
);
295 /* waiting for NAPI to complete can re-enable interrupts */
296 ixgb_irq_disable(adapter
);
297 free_irq(adapter
->pdev
->irq
, netdev
);
299 if (adapter
->have_msi
)
300 pci_disable_msi(adapter
->pdev
);
303 del_timer_sync(&adapter
->watchdog_timer
);
305 adapter
->link_speed
= 0;
306 adapter
->link_duplex
= 0;
307 netif_carrier_off(netdev
);
308 netif_stop_queue(netdev
);
311 ixgb_clean_tx_ring(adapter
);
312 ixgb_clean_rx_ring(adapter
);
316 ixgb_reset(struct ixgb_adapter
*adapter
)
318 struct ixgb_hw
*hw
= &adapter
->hw
;
320 ixgb_adapter_stop(hw
);
321 if (!ixgb_init_hw(hw
))
322 DPRINTK(PROBE
, ERR
, "ixgb_init_hw failed.\n");
324 /* restore frame size information */
325 IXGB_WRITE_REG(hw
, MFS
, hw
->max_frame_size
<< IXGB_MFS_SHIFT
);
326 if (hw
->max_frame_size
>
327 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
) {
328 u32 ctrl0
= IXGB_READ_REG(hw
, CTRL0
);
329 if (!(ctrl0
& IXGB_CTRL0_JFE
)) {
330 ctrl0
|= IXGB_CTRL0_JFE
;
331 IXGB_WRITE_REG(hw
, CTRL0
, ctrl0
);
337 * ixgb_probe - Device Initialization Routine
338 * @pdev: PCI device information struct
339 * @ent: entry in ixgb_pci_tbl
341 * Returns 0 on success, negative on failure
343 * ixgb_probe initializes an adapter identified by a pci_dev structure.
344 * The OS initialization, configuring of the adapter private structure,
345 * and a hardware reset occur.
349 ixgb_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
351 struct net_device
*netdev
= NULL
;
352 struct ixgb_adapter
*adapter
;
353 static int cards_found
= 0;
358 if ((err
= pci_enable_device(pdev
)))
361 if (!(err
= pci_set_dma_mask(pdev
, DMA_64BIT_MASK
)) &&
362 !(err
= pci_set_consistent_dma_mask(pdev
, DMA_64BIT_MASK
))) {
365 if ((err
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
)) ||
366 (err
= pci_set_consistent_dma_mask(pdev
, DMA_32BIT_MASK
))) {
368 "ixgb: No usable DMA configuration, aborting\n");
374 if ((err
= pci_request_regions(pdev
, ixgb_driver_name
)))
375 goto err_request_regions
;
377 pci_set_master(pdev
);
379 netdev
= alloc_etherdev(sizeof(struct ixgb_adapter
));
382 goto err_alloc_etherdev
;
385 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
387 pci_set_drvdata(pdev
, netdev
);
388 adapter
= netdev_priv(netdev
);
389 adapter
->netdev
= netdev
;
390 adapter
->pdev
= pdev
;
391 adapter
->hw
.back
= adapter
;
392 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_DEBUG_LEVEL_SHIFT
);
394 adapter
->hw
.hw_addr
= ioremap(pci_resource_start(pdev
, BAR_0
),
395 pci_resource_len(pdev
, BAR_0
));
396 if (!adapter
->hw
.hw_addr
) {
401 for (i
= BAR_1
; i
<= BAR_5
; i
++) {
402 if (pci_resource_len(pdev
, i
) == 0)
404 if (pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
405 adapter
->hw
.io_base
= pci_resource_start(pdev
, i
);
410 netdev
->open
= &ixgb_open
;
411 netdev
->stop
= &ixgb_close
;
412 netdev
->hard_start_xmit
= &ixgb_xmit_frame
;
413 netdev
->get_stats
= &ixgb_get_stats
;
414 netdev
->set_multicast_list
= &ixgb_set_multi
;
415 netdev
->set_mac_address
= &ixgb_set_mac
;
416 netdev
->change_mtu
= &ixgb_change_mtu
;
417 ixgb_set_ethtool_ops(netdev
);
418 netdev
->tx_timeout
= &ixgb_tx_timeout
;
419 netdev
->watchdog_timeo
= 5 * HZ
;
420 #ifdef CONFIG_IXGB_NAPI
421 netif_napi_add(netdev
, &adapter
->napi
, ixgb_clean
, 64);
423 netdev
->vlan_rx_register
= ixgb_vlan_rx_register
;
424 netdev
->vlan_rx_add_vid
= ixgb_vlan_rx_add_vid
;
425 netdev
->vlan_rx_kill_vid
= ixgb_vlan_rx_kill_vid
;
426 #ifdef CONFIG_NET_POLL_CONTROLLER
427 netdev
->poll_controller
= ixgb_netpoll
;
430 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
432 adapter
->bd_number
= cards_found
;
433 adapter
->link_speed
= 0;
434 adapter
->link_duplex
= 0;
436 /* setup the private structure */
438 if ((err
= ixgb_sw_init(adapter
)))
441 netdev
->features
= NETIF_F_SG
|
445 NETIF_F_HW_VLAN_FILTER
;
446 netdev
->features
|= NETIF_F_TSO
;
449 netdev
->features
|= NETIF_F_HIGHDMA
;
451 /* make sure the EEPROM is good */
453 if (!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
454 DPRINTK(PROBE
, ERR
, "The EEPROM Checksum Is Not Valid\n");
459 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
460 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
462 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
463 DPRINTK(PROBE
, ERR
, "Invalid MAC Address\n");
468 adapter
->part_num
= ixgb_get_ee_pba_number(&adapter
->hw
);
470 init_timer(&adapter
->watchdog_timer
);
471 adapter
->watchdog_timer
.function
= &ixgb_watchdog
;
472 adapter
->watchdog_timer
.data
= (unsigned long)adapter
;
474 INIT_WORK(&adapter
->tx_timeout_task
, ixgb_tx_timeout_task
);
476 strcpy(netdev
->name
, "eth%d");
477 if ((err
= register_netdev(netdev
)))
480 /* we're going to reset, so assume we have no link for now */
482 netif_carrier_off(netdev
);
483 netif_stop_queue(netdev
);
485 DPRINTK(PROBE
, INFO
, "Intel(R) PRO/10GbE Network Connection\n");
486 ixgb_check_options(adapter
);
487 /* reset the hardware with the new settings */
497 iounmap(adapter
->hw
.hw_addr
);
501 pci_release_regions(pdev
);
504 pci_disable_device(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 flush_scheduled_work();
526 unregister_netdev(netdev
);
528 iounmap(adapter
->hw
.hw_addr
);
529 pci_release_regions(pdev
);
535 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
536 * @adapter: board private structure to initialize
538 * ixgb_sw_init initializes the Adapter private data structure.
539 * Fields are initialized based on PCI device information and
540 * OS network device settings (MTU size).
544 ixgb_sw_init(struct ixgb_adapter
*adapter
)
546 struct ixgb_hw
*hw
= &adapter
->hw
;
547 struct net_device
*netdev
= adapter
->netdev
;
548 struct pci_dev
*pdev
= adapter
->pdev
;
550 /* PCI config space info */
552 hw
->vendor_id
= pdev
->vendor
;
553 hw
->device_id
= pdev
->device
;
554 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
555 hw
->subsystem_id
= pdev
->subsystem_device
;
557 hw
->max_frame_size
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
558 adapter
->rx_buffer_len
= hw
->max_frame_size
+ 8; /* + 8 for errata */
560 if ((hw
->device_id
== IXGB_DEVICE_ID_82597EX
)
561 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_CX4
)
562 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_LR
)
563 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_SR
))
564 hw
->mac_type
= ixgb_82597
;
566 /* should never have loaded on this device */
567 DPRINTK(PROBE
, ERR
, "unsupported device id\n");
570 /* enable flow control to be programmed */
573 set_bit(__IXGB_DOWN
, &adapter
->flags
);
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
) {
664 "Unable to allocate transmit descriptor ring memory\n");
667 memset(txdr
->buffer_info
, 0, size
);
669 /* round up to nearest 4K */
671 txdr
->size
= txdr
->count
* sizeof(struct ixgb_tx_desc
);
672 txdr
->size
= ALIGN(txdr
->size
, 4096);
674 txdr
->desc
= pci_alloc_consistent(pdev
, txdr
->size
, &txdr
->dma
);
676 vfree(txdr
->buffer_info
);
678 "Unable to allocate transmit descriptor memory\n");
681 memset(txdr
->desc
, 0, txdr
->size
);
683 txdr
->next_to_use
= 0;
684 txdr
->next_to_clean
= 0;
690 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
691 * @adapter: board private structure
693 * Configure the Tx unit of the MAC after a reset.
697 ixgb_configure_tx(struct ixgb_adapter
*adapter
)
699 u64 tdba
= adapter
->tx_ring
.dma
;
700 u32 tdlen
= adapter
->tx_ring
.count
* sizeof(struct ixgb_tx_desc
);
702 struct ixgb_hw
*hw
= &adapter
->hw
;
704 /* Setup the Base and Length of the Tx Descriptor Ring
705 * tx_ring.dma can be either a 32 or 64 bit value
708 IXGB_WRITE_REG(hw
, TDBAL
, (tdba
& 0x00000000ffffffffULL
));
709 IXGB_WRITE_REG(hw
, TDBAH
, (tdba
>> 32));
711 IXGB_WRITE_REG(hw
, TDLEN
, tdlen
);
713 /* Setup the HW Tx Head and Tail descriptor pointers */
715 IXGB_WRITE_REG(hw
, TDH
, 0);
716 IXGB_WRITE_REG(hw
, TDT
, 0);
718 /* don't set up txdctl, it induces performance problems if configured
720 /* Set the Tx Interrupt Delay register */
722 IXGB_WRITE_REG(hw
, TIDV
, adapter
->tx_int_delay
);
724 /* Program the Transmit Control Register */
726 tctl
= IXGB_TCTL_TCE
| IXGB_TCTL_TXEN
| IXGB_TCTL_TPDE
;
727 IXGB_WRITE_REG(hw
, TCTL
, tctl
);
729 /* Setup Transmit Descriptor Settings for this adapter */
730 adapter
->tx_cmd_type
=
732 (adapter
->tx_int_delay_enable
? IXGB_TX_DESC_CMD_IDE
: 0);
736 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
737 * @adapter: board private structure
739 * Returns 0 on success, negative on failure
743 ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
)
745 struct ixgb_desc_ring
*rxdr
= &adapter
->rx_ring
;
746 struct pci_dev
*pdev
= adapter
->pdev
;
749 size
= sizeof(struct ixgb_buffer
) * rxdr
->count
;
750 rxdr
->buffer_info
= vmalloc(size
);
751 if (!rxdr
->buffer_info
) {
753 "Unable to allocate receive descriptor ring\n");
756 memset(rxdr
->buffer_info
, 0, size
);
758 /* Round up to nearest 4K */
760 rxdr
->size
= rxdr
->count
* sizeof(struct ixgb_rx_desc
);
761 rxdr
->size
= ALIGN(rxdr
->size
, 4096);
763 rxdr
->desc
= pci_alloc_consistent(pdev
, rxdr
->size
, &rxdr
->dma
);
766 vfree(rxdr
->buffer_info
);
768 "Unable to allocate receive descriptors\n");
771 memset(rxdr
->desc
, 0, rxdr
->size
);
773 rxdr
->next_to_clean
= 0;
774 rxdr
->next_to_use
= 0;
780 * ixgb_setup_rctl - configure the receive control register
781 * @adapter: Board private structure
785 ixgb_setup_rctl(struct ixgb_adapter
*adapter
)
789 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
791 rctl
&= ~(3 << IXGB_RCTL_MO_SHIFT
);
794 IXGB_RCTL_BAM
| IXGB_RCTL_RDMTS_1_2
|
795 IXGB_RCTL_RXEN
| IXGB_RCTL_CFF
|
796 (adapter
->hw
.mc_filter_type
<< IXGB_RCTL_MO_SHIFT
);
798 rctl
|= IXGB_RCTL_SECRC
;
800 if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_2048
)
801 rctl
|= IXGB_RCTL_BSIZE_2048
;
802 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_4096
)
803 rctl
|= IXGB_RCTL_BSIZE_4096
;
804 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_8192
)
805 rctl
|= IXGB_RCTL_BSIZE_8192
;
806 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_16384
)
807 rctl
|= IXGB_RCTL_BSIZE_16384
;
809 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
813 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
814 * @adapter: board private structure
816 * Configure the Rx unit of the MAC after a reset.
820 ixgb_configure_rx(struct ixgb_adapter
*adapter
)
822 u64 rdba
= adapter
->rx_ring
.dma
;
823 u32 rdlen
= adapter
->rx_ring
.count
* sizeof(struct ixgb_rx_desc
);
824 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 /* due to the hardware errata with RXDCTL, we are unable to use any of
849 * the performance enhancing features of it without causing other
850 * subtle bugs, some of the bugs could include receive length
851 * corruption at high data rates (WTHRESH > 0) and/or receive
852 * descriptor ring irregularites (particularly in hardware cache) */
853 IXGB_WRITE_REG(hw
, RXDCTL
, 0);
855 /* Enable Receive Checksum Offload for TCP and UDP */
856 if (adapter
->rx_csum
) {
857 rxcsum
= IXGB_READ_REG(hw
, RXCSUM
);
858 rxcsum
|= IXGB_RXCSUM_TUOFL
;
859 IXGB_WRITE_REG(hw
, RXCSUM
, rxcsum
);
862 /* Enable Receives */
864 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
868 * ixgb_free_tx_resources - Free Tx Resources
869 * @adapter: board private structure
871 * Free all transmit software resources
875 ixgb_free_tx_resources(struct ixgb_adapter
*adapter
)
877 struct pci_dev
*pdev
= adapter
->pdev
;
879 ixgb_clean_tx_ring(adapter
);
881 vfree(adapter
->tx_ring
.buffer_info
);
882 adapter
->tx_ring
.buffer_info
= NULL
;
884 pci_free_consistent(pdev
, adapter
->tx_ring
.size
,
885 adapter
->tx_ring
.desc
, adapter
->tx_ring
.dma
);
887 adapter
->tx_ring
.desc
= NULL
;
891 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter
*adapter
,
892 struct ixgb_buffer
*buffer_info
)
894 struct pci_dev
*pdev
= adapter
->pdev
;
896 if (buffer_info
->dma
)
897 pci_unmap_page(pdev
, buffer_info
->dma
, buffer_info
->length
,
900 if (buffer_info
->skb
)
901 dev_kfree_skb_any(buffer_info
->skb
);
903 buffer_info
->skb
= NULL
;
904 buffer_info
->dma
= 0;
905 buffer_info
->time_stamp
= 0;
906 /* these fields must always be initialized in tx
907 * buffer_info->length = 0;
908 * buffer_info->next_to_watch = 0; */
912 * ixgb_clean_tx_ring - Free Tx Buffers
913 * @adapter: board private structure
917 ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
)
919 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
920 struct ixgb_buffer
*buffer_info
;
924 /* Free all the Tx ring sk_buffs */
926 for (i
= 0; i
< tx_ring
->count
; i
++) {
927 buffer_info
= &tx_ring
->buffer_info
[i
];
928 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
931 size
= sizeof(struct ixgb_buffer
) * tx_ring
->count
;
932 memset(tx_ring
->buffer_info
, 0, size
);
934 /* Zero out the descriptor ring */
936 memset(tx_ring
->desc
, 0, tx_ring
->size
);
938 tx_ring
->next_to_use
= 0;
939 tx_ring
->next_to_clean
= 0;
941 IXGB_WRITE_REG(&adapter
->hw
, TDH
, 0);
942 IXGB_WRITE_REG(&adapter
->hw
, TDT
, 0);
946 * ixgb_free_rx_resources - Free Rx Resources
947 * @adapter: board private structure
949 * Free all receive software resources
953 ixgb_free_rx_resources(struct ixgb_adapter
*adapter
)
955 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
956 struct pci_dev
*pdev
= adapter
->pdev
;
958 ixgb_clean_rx_ring(adapter
);
960 vfree(rx_ring
->buffer_info
);
961 rx_ring
->buffer_info
= NULL
;
963 pci_free_consistent(pdev
, rx_ring
->size
, rx_ring
->desc
, rx_ring
->dma
);
965 rx_ring
->desc
= NULL
;
969 * ixgb_clean_rx_ring - Free Rx Buffers
970 * @adapter: board private structure
974 ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
)
976 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
977 struct ixgb_buffer
*buffer_info
;
978 struct pci_dev
*pdev
= adapter
->pdev
;
982 /* Free all the Rx ring sk_buffs */
984 for (i
= 0; i
< rx_ring
->count
; i
++) {
985 buffer_info
= &rx_ring
->buffer_info
[i
];
986 if (buffer_info
->skb
) {
988 pci_unmap_single(pdev
,
993 dev_kfree_skb(buffer_info
->skb
);
995 buffer_info
->skb
= NULL
;
999 size
= sizeof(struct ixgb_buffer
) * rx_ring
->count
;
1000 memset(rx_ring
->buffer_info
, 0, size
);
1002 /* Zero out the descriptor ring */
1004 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1006 rx_ring
->next_to_clean
= 0;
1007 rx_ring
->next_to_use
= 0;
1009 IXGB_WRITE_REG(&adapter
->hw
, RDH
, 0);
1010 IXGB_WRITE_REG(&adapter
->hw
, RDT
, 0);
1014 * ixgb_set_mac - Change the Ethernet Address of the NIC
1015 * @netdev: network interface device structure
1016 * @p: pointer to an address structure
1018 * Returns 0 on success, negative on failure
1022 ixgb_set_mac(struct net_device
*netdev
, void *p
)
1024 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1025 struct sockaddr
*addr
= p
;
1027 if (!is_valid_ether_addr(addr
->sa_data
))
1028 return -EADDRNOTAVAIL
;
1030 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1032 ixgb_rar_set(&adapter
->hw
, addr
->sa_data
, 0);
1038 * ixgb_set_multi - Multicast and Promiscuous mode set
1039 * @netdev: network interface device structure
1041 * The set_multi entry point is called whenever the multicast address
1042 * list or the network interface flags are updated. This routine is
1043 * responsible for configuring the hardware for proper multicast,
1044 * promiscuous mode, and all-multi behavior.
1048 ixgb_set_multi(struct net_device
*netdev
)
1050 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1051 struct ixgb_hw
*hw
= &adapter
->hw
;
1052 struct dev_mc_list
*mc_ptr
;
1056 /* Check for Promiscuous and All Multicast modes */
1058 rctl
= IXGB_READ_REG(hw
, RCTL
);
1060 if (netdev
->flags
& IFF_PROMISC
) {
1061 rctl
|= (IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1062 } else if (netdev
->flags
& IFF_ALLMULTI
) {
1063 rctl
|= IXGB_RCTL_MPE
;
1064 rctl
&= ~IXGB_RCTL_UPE
;
1066 rctl
&= ~(IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1069 if (netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
) {
1070 rctl
|= IXGB_RCTL_MPE
;
1071 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1073 u8 mta
[IXGB_MAX_NUM_MULTICAST_ADDRESSES
*
1074 IXGB_ETH_LENGTH_OF_ADDRESS
];
1076 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1078 for (i
= 0, mc_ptr
= netdev
->mc_list
;
1080 i
++, mc_ptr
= mc_ptr
->next
)
1081 memcpy(&mta
[i
* IXGB_ETH_LENGTH_OF_ADDRESS
],
1082 mc_ptr
->dmi_addr
, IXGB_ETH_LENGTH_OF_ADDRESS
);
1084 ixgb_mc_addr_list_update(hw
, mta
, netdev
->mc_count
, 0);
1089 * ixgb_watchdog - Timer Call-back
1090 * @data: pointer to netdev cast into an unsigned long
1094 ixgb_watchdog(unsigned long data
)
1096 struct ixgb_adapter
*adapter
= (struct ixgb_adapter
*)data
;
1097 struct net_device
*netdev
= adapter
->netdev
;
1098 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
1100 ixgb_check_for_link(&adapter
->hw
);
1102 if (ixgb_check_for_bad_link(&adapter
->hw
)) {
1103 /* force the reset path */
1104 netif_stop_queue(netdev
);
1107 if (adapter
->hw
.link_up
) {
1108 if (!netif_carrier_ok(netdev
)) {
1110 "NIC Link is Up 10000 Mbps Full Duplex\n");
1111 adapter
->link_speed
= 10000;
1112 adapter
->link_duplex
= FULL_DUPLEX
;
1113 netif_carrier_on(netdev
);
1114 netif_wake_queue(netdev
);
1117 if (netif_carrier_ok(netdev
)) {
1118 adapter
->link_speed
= 0;
1119 adapter
->link_duplex
= 0;
1120 DPRINTK(LINK
, INFO
, "NIC Link is Down\n");
1121 netif_carrier_off(netdev
);
1122 netif_stop_queue(netdev
);
1127 ixgb_update_stats(adapter
);
1129 if (!netif_carrier_ok(netdev
)) {
1130 if (IXGB_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
1131 /* We've lost link, so the controller stops DMA,
1132 * but we've got queued Tx work that's never going
1133 * to get done, so reset controller to flush Tx.
1134 * (Do the reset outside of interrupt context). */
1135 schedule_work(&adapter
->tx_timeout_task
);
1139 /* Force detection of hung controller every watchdog period */
1140 adapter
->detect_tx_hung
= true;
1142 /* generate an interrupt to force clean up of any stragglers */
1143 IXGB_WRITE_REG(&adapter
->hw
, ICS
, IXGB_INT_TXDW
);
1145 /* Reset the timer */
1146 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 2 * HZ
);
1149 #define IXGB_TX_FLAGS_CSUM 0x00000001
1150 #define IXGB_TX_FLAGS_VLAN 0x00000002
1151 #define IXGB_TX_FLAGS_TSO 0x00000004
1154 ixgb_tso(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1156 struct ixgb_context_desc
*context_desc
;
1158 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
1159 u16 ipcse
, tucse
, mss
;
1162 if (likely(skb_is_gso(skb
))) {
1163 struct ixgb_buffer
*buffer_info
;
1166 if (skb_header_cloned(skb
)) {
1167 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
1172 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
1173 mss
= skb_shinfo(skb
)->gso_size
;
1177 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
1180 ipcss
= skb_network_offset(skb
);
1181 ipcso
= (void *)&(iph
->check
) - (void *)skb
->data
;
1182 ipcse
= skb_transport_offset(skb
) - 1;
1183 tucss
= skb_transport_offset(skb
);
1184 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
1187 i
= adapter
->tx_ring
.next_to_use
;
1188 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1189 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1190 WARN_ON(buffer_info
->dma
!= 0);
1192 context_desc
->ipcss
= ipcss
;
1193 context_desc
->ipcso
= ipcso
;
1194 context_desc
->ipcse
= cpu_to_le16(ipcse
);
1195 context_desc
->tucss
= tucss
;
1196 context_desc
->tucso
= tucso
;
1197 context_desc
->tucse
= cpu_to_le16(tucse
);
1198 context_desc
->mss
= cpu_to_le16(mss
);
1199 context_desc
->hdr_len
= hdr_len
;
1200 context_desc
->status
= 0;
1201 context_desc
->cmd_type_len
= cpu_to_le32(
1202 IXGB_CONTEXT_DESC_TYPE
1203 | IXGB_CONTEXT_DESC_CMD_TSE
1204 | IXGB_CONTEXT_DESC_CMD_IP
1205 | IXGB_CONTEXT_DESC_CMD_TCP
1206 | IXGB_CONTEXT_DESC_CMD_IDE
1207 | (skb
->len
- (hdr_len
)));
1210 if (++i
== adapter
->tx_ring
.count
) i
= 0;
1211 adapter
->tx_ring
.next_to_use
= i
;
1220 ixgb_tx_csum(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1222 struct ixgb_context_desc
*context_desc
;
1226 if (likely(skb
->ip_summed
== CHECKSUM_PARTIAL
)) {
1227 struct ixgb_buffer
*buffer_info
;
1228 css
= skb_transport_offset(skb
);
1229 cso
= css
+ skb
->csum_offset
;
1231 i
= adapter
->tx_ring
.next_to_use
;
1232 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1233 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1234 WARN_ON(buffer_info
->dma
!= 0);
1236 context_desc
->tucss
= css
;
1237 context_desc
->tucso
= cso
;
1238 context_desc
->tucse
= 0;
1239 /* zero out any previously existing data in one instruction */
1240 *(u32
*)&(context_desc
->ipcss
) = 0;
1241 context_desc
->status
= 0;
1242 context_desc
->hdr_len
= 0;
1243 context_desc
->mss
= 0;
1244 context_desc
->cmd_type_len
=
1245 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1246 | IXGB_TX_DESC_CMD_IDE
);
1248 if (++i
== adapter
->tx_ring
.count
) i
= 0;
1249 adapter
->tx_ring
.next_to_use
= i
;
1257 #define IXGB_MAX_TXD_PWR 14
1258 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1261 ixgb_tx_map(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
,
1264 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1265 struct ixgb_buffer
*buffer_info
;
1267 unsigned int offset
= 0, size
, count
= 0, i
;
1268 unsigned int mss
= skb_shinfo(skb
)->gso_size
;
1270 unsigned int nr_frags
= skb_shinfo(skb
)->nr_frags
;
1273 len
-= skb
->data_len
;
1275 i
= tx_ring
->next_to_use
;
1278 buffer_info
= &tx_ring
->buffer_info
[i
];
1279 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1280 /* Workaround for premature desc write-backs
1281 * in TSO mode. Append 4-byte sentinel desc */
1282 if (unlikely(mss
&& !nr_frags
&& size
== len
&& size
> 8))
1285 buffer_info
->length
= size
;
1286 WARN_ON(buffer_info
->dma
!= 0);
1287 buffer_info
->time_stamp
= jiffies
;
1289 pci_map_single(adapter
->pdev
,
1293 buffer_info
->next_to_watch
= 0;
1298 if (++i
== tx_ring
->count
) i
= 0;
1301 for (f
= 0; f
< nr_frags
; f
++) {
1302 struct skb_frag_struct
*frag
;
1304 frag
= &skb_shinfo(skb
)->frags
[f
];
1309 buffer_info
= &tx_ring
->buffer_info
[i
];
1310 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1312 /* Workaround for premature desc write-backs
1313 * in TSO mode. Append 4-byte sentinel desc */
1314 if (unlikely(mss
&& (f
== (nr_frags
- 1))
1315 && size
== len
&& size
> 8))
1318 buffer_info
->length
= size
;
1319 buffer_info
->time_stamp
= jiffies
;
1321 pci_map_page(adapter
->pdev
,
1323 frag
->page_offset
+ offset
,
1326 buffer_info
->next_to_watch
= 0;
1331 if (++i
== tx_ring
->count
) i
= 0;
1334 i
= (i
== 0) ? tx_ring
->count
- 1 : i
- 1;
1335 tx_ring
->buffer_info
[i
].skb
= skb
;
1336 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
1342 ixgb_tx_queue(struct ixgb_adapter
*adapter
, int count
, int vlan_id
,int tx_flags
)
1344 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1345 struct ixgb_tx_desc
*tx_desc
= NULL
;
1346 struct ixgb_buffer
*buffer_info
;
1347 u32 cmd_type_len
= adapter
->tx_cmd_type
;
1352 if (tx_flags
& IXGB_TX_FLAGS_TSO
) {
1353 cmd_type_len
|= IXGB_TX_DESC_CMD_TSE
;
1354 popts
|= (IXGB_TX_DESC_POPTS_IXSM
| IXGB_TX_DESC_POPTS_TXSM
);
1357 if (tx_flags
& IXGB_TX_FLAGS_CSUM
)
1358 popts
|= IXGB_TX_DESC_POPTS_TXSM
;
1360 if (tx_flags
& IXGB_TX_FLAGS_VLAN
)
1361 cmd_type_len
|= IXGB_TX_DESC_CMD_VLE
;
1363 i
= tx_ring
->next_to_use
;
1366 buffer_info
= &tx_ring
->buffer_info
[i
];
1367 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1368 tx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
1369 tx_desc
->cmd_type_len
=
1370 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
1371 tx_desc
->status
= status
;
1372 tx_desc
->popts
= popts
;
1373 tx_desc
->vlan
= cpu_to_le16(vlan_id
);
1375 if (++i
== tx_ring
->count
) i
= 0;
1378 tx_desc
->cmd_type_len
|=
1379 cpu_to_le32(IXGB_TX_DESC_CMD_EOP
| IXGB_TX_DESC_CMD_RS
);
1381 /* Force memory writes to complete before letting h/w
1382 * know there are new descriptors to fetch. (Only
1383 * applicable for weak-ordered memory model archs,
1384 * such as IA-64). */
1387 tx_ring
->next_to_use
= i
;
1388 IXGB_WRITE_REG(&adapter
->hw
, TDT
, i
);
1391 static int __ixgb_maybe_stop_tx(struct net_device
*netdev
, int size
)
1393 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1394 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1396 netif_stop_queue(netdev
);
1397 /* Herbert's original patch had:
1398 * smp_mb__after_netif_stop_queue();
1399 * but since that doesn't exist yet, just open code it. */
1402 /* We need to check again in a case another CPU has just
1403 * made room available. */
1404 if (likely(IXGB_DESC_UNUSED(tx_ring
) < size
))
1408 netif_start_queue(netdev
);
1409 ++adapter
->restart_queue
;
1413 static int ixgb_maybe_stop_tx(struct net_device
*netdev
,
1414 struct ixgb_desc_ring
*tx_ring
, int size
)
1416 if (likely(IXGB_DESC_UNUSED(tx_ring
) >= size
))
1418 return __ixgb_maybe_stop_tx(netdev
, size
);
1422 /* Tx Descriptors needed, worst case */
1423 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1424 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1425 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1426 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1427 + 1 /* one more needed for sentinel TSO workaround */
1430 ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
1432 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1434 unsigned int tx_flags
= 0;
1438 if (test_bit(__IXGB_DOWN
, &adapter
->flags
)) {
1440 return NETDEV_TX_OK
;
1443 if (skb
->len
<= 0) {
1444 dev_kfree_skb_any(skb
);
1448 if (unlikely(ixgb_maybe_stop_tx(netdev
, &adapter
->tx_ring
,
1450 return NETDEV_TX_BUSY
;
1452 if (adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
1453 tx_flags
|= IXGB_TX_FLAGS_VLAN
;
1454 vlan_id
= vlan_tx_tag_get(skb
);
1457 first
= adapter
->tx_ring
.next_to_use
;
1459 tso
= ixgb_tso(adapter
, skb
);
1461 dev_kfree_skb_any(skb
);
1462 return NETDEV_TX_OK
;
1466 tx_flags
|= IXGB_TX_FLAGS_TSO
;
1467 else if (ixgb_tx_csum(adapter
, skb
))
1468 tx_flags
|= IXGB_TX_FLAGS_CSUM
;
1470 ixgb_tx_queue(adapter
, ixgb_tx_map(adapter
, skb
, first
), vlan_id
,
1473 netdev
->trans_start
= jiffies
;
1475 /* Make sure there is space in the ring for the next send. */
1476 ixgb_maybe_stop_tx(netdev
, &adapter
->tx_ring
, DESC_NEEDED
);
1478 return NETDEV_TX_OK
;
1482 * ixgb_tx_timeout - Respond to a Tx Hang
1483 * @netdev: network interface device structure
1487 ixgb_tx_timeout(struct net_device
*netdev
)
1489 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1491 /* Do the reset outside of interrupt context */
1492 schedule_work(&adapter
->tx_timeout_task
);
1496 ixgb_tx_timeout_task(struct work_struct
*work
)
1498 struct ixgb_adapter
*adapter
=
1499 container_of(work
, struct ixgb_adapter
, tx_timeout_task
);
1501 adapter
->tx_timeout_count
++;
1502 ixgb_down(adapter
, true);
1507 * ixgb_get_stats - Get System Network Statistics
1508 * @netdev: network interface device structure
1510 * Returns the address of the device statistics structure.
1511 * The statistics are actually updated from the timer callback.
1514 static struct net_device_stats
*
1515 ixgb_get_stats(struct net_device
*netdev
)
1517 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1519 return &adapter
->net_stats
;
1523 * ixgb_change_mtu - Change the Maximum Transfer Unit
1524 * @netdev: network interface device structure
1525 * @new_mtu: new value for maximum frame size
1527 * Returns 0 on success, negative on failure
1531 ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
)
1533 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1534 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1535 int old_max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1537 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1538 if ((new_mtu
< 68) ||
1539 (max_frame
> IXGB_MAX_JUMBO_FRAME_SIZE
+ ENET_FCS_LENGTH
)) {
1540 DPRINTK(PROBE
, ERR
, "Invalid MTU setting %d\n", new_mtu
);
1544 if (old_max_frame
== max_frame
)
1547 if (netif_running(netdev
))
1548 ixgb_down(adapter
, true);
1550 adapter
->rx_buffer_len
= max_frame
+ 8; /* + 8 for errata */
1552 netdev
->mtu
= new_mtu
;
1554 if (netif_running(netdev
))
1561 * ixgb_update_stats - Update the board statistics counters.
1562 * @adapter: board private structure
1566 ixgb_update_stats(struct ixgb_adapter
*adapter
)
1568 struct net_device
*netdev
= adapter
->netdev
;
1569 struct pci_dev
*pdev
= adapter
->pdev
;
1571 /* Prevent stats update while adapter is being reset */
1572 if (pci_channel_offline(pdev
))
1575 if ((netdev
->flags
& IFF_PROMISC
) || (netdev
->flags
& IFF_ALLMULTI
) ||
1576 (netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
)) {
1577 u64 multi
= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1578 u32 bcast_l
= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1579 u32 bcast_h
= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1580 u64 bcast
= ((u64
)bcast_h
<< 32) | bcast_l
;
1582 multi
|= ((u64
)IXGB_READ_REG(&adapter
->hw
, MPRCH
) << 32);
1583 /* fix up multicast stats by removing broadcasts */
1587 adapter
->stats
.mprcl
+= (multi
& 0xFFFFFFFF);
1588 adapter
->stats
.mprch
+= (multi
>> 32);
1589 adapter
->stats
.bprcl
+= bcast_l
;
1590 adapter
->stats
.bprch
+= bcast_h
;
1592 adapter
->stats
.mprcl
+= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1593 adapter
->stats
.mprch
+= IXGB_READ_REG(&adapter
->hw
, MPRCH
);
1594 adapter
->stats
.bprcl
+= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1595 adapter
->stats
.bprch
+= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1597 adapter
->stats
.tprl
+= IXGB_READ_REG(&adapter
->hw
, TPRL
);
1598 adapter
->stats
.tprh
+= IXGB_READ_REG(&adapter
->hw
, TPRH
);
1599 adapter
->stats
.gprcl
+= IXGB_READ_REG(&adapter
->hw
, GPRCL
);
1600 adapter
->stats
.gprch
+= IXGB_READ_REG(&adapter
->hw
, GPRCH
);
1601 adapter
->stats
.uprcl
+= IXGB_READ_REG(&adapter
->hw
, UPRCL
);
1602 adapter
->stats
.uprch
+= IXGB_READ_REG(&adapter
->hw
, UPRCH
);
1603 adapter
->stats
.vprcl
+= IXGB_READ_REG(&adapter
->hw
, VPRCL
);
1604 adapter
->stats
.vprch
+= IXGB_READ_REG(&adapter
->hw
, VPRCH
);
1605 adapter
->stats
.jprcl
+= IXGB_READ_REG(&adapter
->hw
, JPRCL
);
1606 adapter
->stats
.jprch
+= IXGB_READ_REG(&adapter
->hw
, JPRCH
);
1607 adapter
->stats
.gorcl
+= IXGB_READ_REG(&adapter
->hw
, GORCL
);
1608 adapter
->stats
.gorch
+= IXGB_READ_REG(&adapter
->hw
, GORCH
);
1609 adapter
->stats
.torl
+= IXGB_READ_REG(&adapter
->hw
, TORL
);
1610 adapter
->stats
.torh
+= IXGB_READ_REG(&adapter
->hw
, TORH
);
1611 adapter
->stats
.rnbc
+= IXGB_READ_REG(&adapter
->hw
, RNBC
);
1612 adapter
->stats
.ruc
+= IXGB_READ_REG(&adapter
->hw
, RUC
);
1613 adapter
->stats
.roc
+= IXGB_READ_REG(&adapter
->hw
, ROC
);
1614 adapter
->stats
.rlec
+= IXGB_READ_REG(&adapter
->hw
, RLEC
);
1615 adapter
->stats
.crcerrs
+= IXGB_READ_REG(&adapter
->hw
, CRCERRS
);
1616 adapter
->stats
.icbc
+= IXGB_READ_REG(&adapter
->hw
, ICBC
);
1617 adapter
->stats
.ecbc
+= IXGB_READ_REG(&adapter
->hw
, ECBC
);
1618 adapter
->stats
.mpc
+= IXGB_READ_REG(&adapter
->hw
, MPC
);
1619 adapter
->stats
.tptl
+= IXGB_READ_REG(&adapter
->hw
, TPTL
);
1620 adapter
->stats
.tpth
+= IXGB_READ_REG(&adapter
->hw
, TPTH
);
1621 adapter
->stats
.gptcl
+= IXGB_READ_REG(&adapter
->hw
, GPTCL
);
1622 adapter
->stats
.gptch
+= IXGB_READ_REG(&adapter
->hw
, GPTCH
);
1623 adapter
->stats
.bptcl
+= IXGB_READ_REG(&adapter
->hw
, BPTCL
);
1624 adapter
->stats
.bptch
+= IXGB_READ_REG(&adapter
->hw
, BPTCH
);
1625 adapter
->stats
.mptcl
+= IXGB_READ_REG(&adapter
->hw
, MPTCL
);
1626 adapter
->stats
.mptch
+= IXGB_READ_REG(&adapter
->hw
, MPTCH
);
1627 adapter
->stats
.uptcl
+= IXGB_READ_REG(&adapter
->hw
, UPTCL
);
1628 adapter
->stats
.uptch
+= IXGB_READ_REG(&adapter
->hw
, UPTCH
);
1629 adapter
->stats
.vptcl
+= IXGB_READ_REG(&adapter
->hw
, VPTCL
);
1630 adapter
->stats
.vptch
+= IXGB_READ_REG(&adapter
->hw
, VPTCH
);
1631 adapter
->stats
.jptcl
+= IXGB_READ_REG(&adapter
->hw
, JPTCL
);
1632 adapter
->stats
.jptch
+= IXGB_READ_REG(&adapter
->hw
, JPTCH
);
1633 adapter
->stats
.gotcl
+= IXGB_READ_REG(&adapter
->hw
, GOTCL
);
1634 adapter
->stats
.gotch
+= IXGB_READ_REG(&adapter
->hw
, GOTCH
);
1635 adapter
->stats
.totl
+= IXGB_READ_REG(&adapter
->hw
, TOTL
);
1636 adapter
->stats
.toth
+= IXGB_READ_REG(&adapter
->hw
, TOTH
);
1637 adapter
->stats
.dc
+= IXGB_READ_REG(&adapter
->hw
, DC
);
1638 adapter
->stats
.plt64c
+= IXGB_READ_REG(&adapter
->hw
, PLT64C
);
1639 adapter
->stats
.tsctc
+= IXGB_READ_REG(&adapter
->hw
, TSCTC
);
1640 adapter
->stats
.tsctfc
+= IXGB_READ_REG(&adapter
->hw
, TSCTFC
);
1641 adapter
->stats
.ibic
+= IXGB_READ_REG(&adapter
->hw
, IBIC
);
1642 adapter
->stats
.rfc
+= IXGB_READ_REG(&adapter
->hw
, RFC
);
1643 adapter
->stats
.lfc
+= IXGB_READ_REG(&adapter
->hw
, LFC
);
1644 adapter
->stats
.pfrc
+= IXGB_READ_REG(&adapter
->hw
, PFRC
);
1645 adapter
->stats
.pftc
+= IXGB_READ_REG(&adapter
->hw
, PFTC
);
1646 adapter
->stats
.mcfrc
+= IXGB_READ_REG(&adapter
->hw
, MCFRC
);
1647 adapter
->stats
.mcftc
+= IXGB_READ_REG(&adapter
->hw
, MCFTC
);
1648 adapter
->stats
.xonrxc
+= IXGB_READ_REG(&adapter
->hw
, XONRXC
);
1649 adapter
->stats
.xontxc
+= IXGB_READ_REG(&adapter
->hw
, XONTXC
);
1650 adapter
->stats
.xoffrxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFRXC
);
1651 adapter
->stats
.xofftxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFTXC
);
1652 adapter
->stats
.rjc
+= IXGB_READ_REG(&adapter
->hw
, RJC
);
1654 /* Fill out the OS statistics structure */
1656 adapter
->net_stats
.rx_packets
= adapter
->stats
.gprcl
;
1657 adapter
->net_stats
.tx_packets
= adapter
->stats
.gptcl
;
1658 adapter
->net_stats
.rx_bytes
= adapter
->stats
.gorcl
;
1659 adapter
->net_stats
.tx_bytes
= adapter
->stats
.gotcl
;
1660 adapter
->net_stats
.multicast
= adapter
->stats
.mprcl
;
1661 adapter
->net_stats
.collisions
= 0;
1663 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1664 * with a length in the type/len field */
1665 adapter
->net_stats
.rx_errors
=
1666 /* adapter->stats.rnbc + */ adapter
->stats
.crcerrs
+
1667 adapter
->stats
.ruc
+
1668 adapter
->stats
.roc
/*+ adapter->stats.rlec */ +
1669 adapter
->stats
.icbc
+
1670 adapter
->stats
.ecbc
+ adapter
->stats
.mpc
;
1673 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1676 adapter
->net_stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
1677 adapter
->net_stats
.rx_fifo_errors
= adapter
->stats
.mpc
;
1678 adapter
->net_stats
.rx_missed_errors
= adapter
->stats
.mpc
;
1679 adapter
->net_stats
.rx_over_errors
= adapter
->stats
.mpc
;
1681 adapter
->net_stats
.tx_errors
= 0;
1682 adapter
->net_stats
.rx_frame_errors
= 0;
1683 adapter
->net_stats
.tx_aborted_errors
= 0;
1684 adapter
->net_stats
.tx_carrier_errors
= 0;
1685 adapter
->net_stats
.tx_fifo_errors
= 0;
1686 adapter
->net_stats
.tx_heartbeat_errors
= 0;
1687 adapter
->net_stats
.tx_window_errors
= 0;
1690 #define IXGB_MAX_INTR 10
1692 * ixgb_intr - Interrupt Handler
1693 * @irq: interrupt number
1694 * @data: pointer to a network interface device structure
1698 ixgb_intr(int irq
, void *data
)
1700 struct net_device
*netdev
= data
;
1701 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1702 struct ixgb_hw
*hw
= &adapter
->hw
;
1703 u32 icr
= IXGB_READ_REG(hw
, ICR
);
1704 #ifndef CONFIG_IXGB_NAPI
1709 return IRQ_NONE
; /* Not our interrupt */
1711 if (unlikely(icr
& (IXGB_INT_RXSEQ
| IXGB_INT_LSC
)))
1712 if (!test_bit(__IXGB_DOWN
, &adapter
->flags
))
1713 mod_timer(&adapter
->watchdog_timer
, jiffies
);
1715 #ifdef CONFIG_IXGB_NAPI
1716 if (netif_rx_schedule_prep(netdev
, &adapter
->napi
)) {
1718 /* Disable interrupts and register for poll. The flush
1719 of the posted write is intentionally left out.
1722 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
1723 __netif_rx_schedule(netdev
, &adapter
->napi
);
1726 /* yes, that is actually a & and it is meant to make sure that
1727 * every pass through this for loop checks both receive and
1728 * transmit queues for completed descriptors, intended to
1729 * avoid starvation issues and assist tx/rx fairness. */
1730 for (i
= 0; i
< IXGB_MAX_INTR
; i
++)
1731 if (!ixgb_clean_rx_irq(adapter
) &
1732 !ixgb_clean_tx_irq(adapter
))
1738 #ifdef CONFIG_IXGB_NAPI
1740 * ixgb_clean - NAPI Rx polling callback
1741 * @adapter: board private structure
1745 ixgb_clean(struct napi_struct
*napi
, int budget
)
1747 struct ixgb_adapter
*adapter
= container_of(napi
, struct ixgb_adapter
, napi
);
1748 struct net_device
*netdev
= adapter
->netdev
;
1751 ixgb_clean_tx_irq(adapter
);
1752 ixgb_clean_rx_irq(adapter
, &work_done
, budget
);
1754 /* If budget not fully consumed, exit the polling mode */
1755 if (work_done
< budget
) {
1756 netif_rx_complete(netdev
, napi
);
1757 if (!test_bit(__IXGB_DOWN
, &adapter
->flags
))
1758 ixgb_irq_enable(adapter
);
1766 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1767 * @adapter: board private structure
1771 ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
)
1773 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1774 struct net_device
*netdev
= adapter
->netdev
;
1775 struct ixgb_tx_desc
*tx_desc
, *eop_desc
;
1776 struct ixgb_buffer
*buffer_info
;
1777 unsigned int i
, eop
;
1778 bool cleaned
= false;
1780 i
= tx_ring
->next_to_clean
;
1781 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1782 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1784 while (eop_desc
->status
& IXGB_TX_DESC_STATUS_DD
) {
1786 for (cleaned
= false; !cleaned
; ) {
1787 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1788 buffer_info
= &tx_ring
->buffer_info
[i
];
1790 if (tx_desc
->popts
&
1791 (IXGB_TX_DESC_POPTS_TXSM
|
1792 IXGB_TX_DESC_POPTS_IXSM
))
1793 adapter
->hw_csum_tx_good
++;
1795 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
1797 *(u32
*)&(tx_desc
->status
) = 0;
1799 cleaned
= (i
== eop
);
1800 if (++i
== tx_ring
->count
) i
= 0;
1803 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1804 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1807 tx_ring
->next_to_clean
= i
;
1809 if (unlikely(cleaned
&& netif_carrier_ok(netdev
) &&
1810 IXGB_DESC_UNUSED(tx_ring
) >= DESC_NEEDED
)) {
1811 /* Make sure that anybody stopping the queue after this
1812 * sees the new next_to_clean. */
1815 if (netif_queue_stopped(netdev
) &&
1816 !(test_bit(__IXGB_DOWN
, &adapter
->flags
))) {
1817 netif_wake_queue(netdev
);
1818 ++adapter
->restart_queue
;
1822 if (adapter
->detect_tx_hung
) {
1823 /* detect a transmit hang in hardware, this serializes the
1824 * check with the clearing of time_stamp and movement of i */
1825 adapter
->detect_tx_hung
= false;
1826 if (tx_ring
->buffer_info
[eop
].dma
&&
1827 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+ HZ
)
1828 && !(IXGB_READ_REG(&adapter
->hw
, STATUS
) &
1829 IXGB_STATUS_TXOFF
)) {
1830 /* detected Tx unit hang */
1831 DPRINTK(DRV
, ERR
, "Detected Tx Unit Hang\n"
1834 " next_to_use <%x>\n"
1835 " next_to_clean <%x>\n"
1836 "buffer_info[next_to_clean]\n"
1837 " time_stamp <%lx>\n"
1838 " next_to_watch <%x>\n"
1840 " next_to_watch.status <%x>\n",
1841 IXGB_READ_REG(&adapter
->hw
, TDH
),
1842 IXGB_READ_REG(&adapter
->hw
, TDT
),
1843 tx_ring
->next_to_use
,
1844 tx_ring
->next_to_clean
,
1845 tx_ring
->buffer_info
[eop
].time_stamp
,
1849 netif_stop_queue(netdev
);
1857 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1858 * @adapter: board private structure
1859 * @rx_desc: receive descriptor
1860 * @sk_buff: socket buffer with received data
1864 ixgb_rx_checksum(struct ixgb_adapter
*adapter
,
1865 struct ixgb_rx_desc
*rx_desc
,
1866 struct sk_buff
*skb
)
1868 /* Ignore Checksum bit is set OR
1869 * TCP Checksum has not been calculated
1871 if ((rx_desc
->status
& IXGB_RX_DESC_STATUS_IXSM
) ||
1872 (!(rx_desc
->status
& IXGB_RX_DESC_STATUS_TCPCS
))) {
1873 skb
->ip_summed
= CHECKSUM_NONE
;
1877 /* At this point we know the hardware did the TCP checksum */
1878 /* now look at the TCP checksum error bit */
1879 if (rx_desc
->errors
& IXGB_RX_DESC_ERRORS_TCPE
) {
1880 /* let the stack verify checksum errors */
1881 skb
->ip_summed
= CHECKSUM_NONE
;
1882 adapter
->hw_csum_rx_error
++;
1884 /* TCP checksum is good */
1885 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1886 adapter
->hw_csum_rx_good
++;
1891 * ixgb_clean_rx_irq - Send received data up the network stack,
1892 * @adapter: board private structure
1896 #ifdef CONFIG_IXGB_NAPI
1897 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
, int *work_done
, int work_to_do
)
1899 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
)
1902 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1903 struct net_device
*netdev
= adapter
->netdev
;
1904 struct pci_dev
*pdev
= adapter
->pdev
;
1905 struct ixgb_rx_desc
*rx_desc
, *next_rxd
;
1906 struct ixgb_buffer
*buffer_info
, *next_buffer
, *next2_buffer
;
1909 int cleaned_count
= 0;
1910 bool cleaned
= false;
1912 i
= rx_ring
->next_to_clean
;
1913 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
1914 buffer_info
= &rx_ring
->buffer_info
[i
];
1916 while (rx_desc
->status
& IXGB_RX_DESC_STATUS_DD
) {
1917 struct sk_buff
*skb
;
1920 #ifdef CONFIG_IXGB_NAPI
1921 if (*work_done
>= work_to_do
)
1926 status
= rx_desc
->status
;
1927 skb
= buffer_info
->skb
;
1928 buffer_info
->skb
= NULL
;
1930 prefetch(skb
->data
- NET_IP_ALIGN
);
1932 if (++i
== rx_ring
->count
) i
= 0;
1933 next_rxd
= IXGB_RX_DESC(*rx_ring
, i
);
1936 if ((j
= i
+ 1) == rx_ring
->count
) j
= 0;
1937 next2_buffer
= &rx_ring
->buffer_info
[j
];
1938 prefetch(next2_buffer
);
1940 next_buffer
= &rx_ring
->buffer_info
[i
];
1945 pci_unmap_single(pdev
,
1947 buffer_info
->length
,
1948 PCI_DMA_FROMDEVICE
);
1949 buffer_info
->dma
= 0;
1951 length
= le16_to_cpu(rx_desc
->length
);
1952 rx_desc
->length
= 0;
1954 if (unlikely(!(status
& IXGB_RX_DESC_STATUS_EOP
))) {
1956 /* All receives must fit into a single buffer */
1958 IXGB_DBG("Receive packet consumed multiple buffers "
1959 "length<%x>\n", length
);
1961 dev_kfree_skb_irq(skb
);
1965 if (unlikely(rx_desc
->errors
&
1966 (IXGB_RX_DESC_ERRORS_CE
| IXGB_RX_DESC_ERRORS_SE
|
1967 IXGB_RX_DESC_ERRORS_P
| IXGB_RX_DESC_ERRORS_RXE
))) {
1968 dev_kfree_skb_irq(skb
);
1972 /* code added for copybreak, this should improve
1973 * performance for small packets with large amounts
1974 * of reassembly being done in the stack */
1975 if (length
< copybreak
) {
1976 struct sk_buff
*new_skb
=
1977 netdev_alloc_skb(netdev
, length
+ NET_IP_ALIGN
);
1979 skb_reserve(new_skb
, NET_IP_ALIGN
);
1980 skb_copy_to_linear_data_offset(new_skb
,
1986 /* save the skb in buffer_info as good */
1987 buffer_info
->skb
= skb
;
1991 /* end copybreak code */
1994 skb_put(skb
, length
);
1996 /* Receive Checksum Offload */
1997 ixgb_rx_checksum(adapter
, rx_desc
, skb
);
1999 skb
->protocol
= eth_type_trans(skb
, netdev
);
2000 #ifdef CONFIG_IXGB_NAPI
2001 if (adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
2002 vlan_hwaccel_receive_skb(skb
, adapter
->vlgrp
,
2003 le16_to_cpu(rx_desc
->special
));
2005 netif_receive_skb(skb
);
2007 #else /* CONFIG_IXGB_NAPI */
2008 if (adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
2009 vlan_hwaccel_rx(skb
, adapter
->vlgrp
,
2010 le16_to_cpu(rx_desc
->special
));
2014 #endif /* CONFIG_IXGB_NAPI */
2015 netdev
->last_rx
= jiffies
;
2018 /* clean up descriptor, might be written over by hw */
2019 rx_desc
->status
= 0;
2021 /* return some buffers to hardware, one at a time is too slow */
2022 if (unlikely(cleaned_count
>= IXGB_RX_BUFFER_WRITE
)) {
2023 ixgb_alloc_rx_buffers(adapter
, cleaned_count
);
2027 /* use prefetched values */
2029 buffer_info
= next_buffer
;
2032 rx_ring
->next_to_clean
= i
;
2034 cleaned_count
= IXGB_DESC_UNUSED(rx_ring
);
2036 ixgb_alloc_rx_buffers(adapter
, cleaned_count
);
2042 * ixgb_alloc_rx_buffers - Replace used receive buffers
2043 * @adapter: address of board private structure
2047 ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
, int cleaned_count
)
2049 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
2050 struct net_device
*netdev
= adapter
->netdev
;
2051 struct pci_dev
*pdev
= adapter
->pdev
;
2052 struct ixgb_rx_desc
*rx_desc
;
2053 struct ixgb_buffer
*buffer_info
;
2054 struct sk_buff
*skb
;
2058 i
= rx_ring
->next_to_use
;
2059 buffer_info
= &rx_ring
->buffer_info
[i
];
2060 cleancount
= IXGB_DESC_UNUSED(rx_ring
);
2063 /* leave three descriptors unused */
2064 while (--cleancount
> 2 && cleaned_count
--) {
2065 /* recycle! its good for you */
2066 skb
= buffer_info
->skb
;
2072 skb
= netdev_alloc_skb(netdev
, adapter
->rx_buffer_len
2074 if (unlikely(!skb
)) {
2075 /* Better luck next round */
2076 adapter
->alloc_rx_buff_failed
++;
2080 /* Make buffer alignment 2 beyond a 16 byte boundary
2081 * this will result in a 16 byte aligned IP header after
2082 * the 14 byte MAC header is removed
2084 skb_reserve(skb
, NET_IP_ALIGN
);
2086 buffer_info
->skb
= skb
;
2087 buffer_info
->length
= adapter
->rx_buffer_len
;
2089 buffer_info
->dma
= pci_map_single(pdev
,
2091 adapter
->rx_buffer_len
,
2092 PCI_DMA_FROMDEVICE
);
2094 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
2095 rx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
2096 /* guarantee DD bit not set now before h/w gets descriptor
2097 * this is the rest of the workaround for h/w double
2099 rx_desc
->status
= 0;
2102 if (++i
== rx_ring
->count
) i
= 0;
2103 buffer_info
= &rx_ring
->buffer_info
[i
];
2106 if (likely(rx_ring
->next_to_use
!= i
)) {
2107 rx_ring
->next_to_use
= i
;
2108 if (unlikely(i
-- == 0))
2109 i
= (rx_ring
->count
- 1);
2111 /* Force memory writes to complete before letting h/w
2112 * know there are new descriptors to fetch. (Only
2113 * applicable for weak-ordered memory model archs, such
2116 IXGB_WRITE_REG(&adapter
->hw
, RDT
, i
);
2121 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2123 * @param netdev network interface device structure
2124 * @param grp indicates to enable or disable tagging/stripping
2127 ixgb_vlan_rx_register(struct net_device
*netdev
, struct vlan_group
*grp
)
2129 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2132 ixgb_irq_disable(adapter
);
2133 adapter
->vlgrp
= grp
;
2136 /* enable VLAN tag insert/strip */
2137 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2138 ctrl
|= IXGB_CTRL0_VME
;
2139 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2141 /* enable VLAN receive filtering */
2143 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2144 rctl
|= IXGB_RCTL_VFE
;
2145 rctl
&= ~IXGB_RCTL_CFIEN
;
2146 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2148 /* disable VLAN tag insert/strip */
2150 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2151 ctrl
&= ~IXGB_CTRL0_VME
;
2152 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2154 /* disable VLAN filtering */
2156 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2157 rctl
&= ~IXGB_RCTL_VFE
;
2158 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2161 /* don't enable interrupts unless we are UP */
2162 if (adapter
->netdev
->flags
& IFF_UP
)
2163 ixgb_irq_enable(adapter
);
2167 ixgb_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
2169 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2172 /* add VID to filter table */
2174 index
= (vid
>> 5) & 0x7F;
2175 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2176 vfta
|= (1 << (vid
& 0x1F));
2177 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2181 ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
2183 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2186 ixgb_irq_disable(adapter
);
2188 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
2190 /* don't enable interrupts unless we are UP */
2191 if (adapter
->netdev
->flags
& IFF_UP
)
2192 ixgb_irq_enable(adapter
);
2194 /* remove VID from filter table */
2196 index
= (vid
>> 5) & 0x7F;
2197 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2198 vfta
&= ~(1 << (vid
& 0x1F));
2199 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2203 ixgb_restore_vlan(struct ixgb_adapter
*adapter
)
2205 ixgb_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
2207 if (adapter
->vlgrp
) {
2209 for (vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
2210 if (!vlan_group_get_device(adapter
->vlgrp
, vid
))
2212 ixgb_vlan_rx_add_vid(adapter
->netdev
, vid
);
2217 #ifdef CONFIG_NET_POLL_CONTROLLER
2219 * Polling 'interrupt' - used by things like netconsole to send skbs
2220 * without having to re-enable interrupts. It's not called while
2221 * the interrupt routine is executing.
2224 static void ixgb_netpoll(struct net_device
*dev
)
2226 struct ixgb_adapter
*adapter
= netdev_priv(dev
);
2228 disable_irq(adapter
->pdev
->irq
);
2229 ixgb_intr(adapter
->pdev
->irq
, dev
);
2230 enable_irq(adapter
->pdev
->irq
);
2235 * ixgb_io_error_detected() - called when PCI error is detected
2236 * @pdev pointer to pci device with error
2237 * @state pci channel state after error
2239 * This callback is called by the PCI subsystem whenever
2240 * a PCI bus error is detected.
2242 static pci_ers_result_t
ixgb_io_error_detected(struct pci_dev
*pdev
,
2243 enum pci_channel_state state
)
2245 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2246 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2248 if (netif_running(netdev
))
2249 ixgb_down(adapter
, true);
2251 pci_disable_device(pdev
);
2253 /* Request a slot reset. */
2254 return PCI_ERS_RESULT_NEED_RESET
;
2258 * ixgb_io_slot_reset - called after the pci bus has been reset.
2259 * @pdev pointer to pci device with error
2261 * This callback is called after the PCI bus has been reset.
2262 * Basically, this tries to restart the card from scratch.
2263 * This is a shortened version of the device probe/discovery code,
2264 * it resembles the first-half of the ixgb_probe() routine.
2266 static pci_ers_result_t
ixgb_io_slot_reset(struct pci_dev
*pdev
)
2268 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2269 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2271 if (pci_enable_device(pdev
)) {
2272 DPRINTK(PROBE
, ERR
, "Cannot re-enable PCI device after reset.\n");
2273 return PCI_ERS_RESULT_DISCONNECT
;
2276 /* Perform card reset only on one instance of the card */
2277 if (0 != PCI_FUNC (pdev
->devfn
))
2278 return PCI_ERS_RESULT_RECOVERED
;
2280 pci_set_master(pdev
);
2282 netif_carrier_off(netdev
);
2283 netif_stop_queue(netdev
);
2284 ixgb_reset(adapter
);
2286 /* Make sure the EEPROM is good */
2287 if (!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
2288 DPRINTK(PROBE
, ERR
, "After reset, the EEPROM checksum is not valid.\n");
2289 return PCI_ERS_RESULT_DISCONNECT
;
2291 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
2292 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
2294 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
2295 DPRINTK(PROBE
, ERR
, "After reset, invalid MAC address.\n");
2296 return PCI_ERS_RESULT_DISCONNECT
;
2299 return PCI_ERS_RESULT_RECOVERED
;
2303 * ixgb_io_resume - called when its OK to resume normal operations
2304 * @pdev pointer to pci device with error
2306 * The error recovery driver tells us that its OK to resume
2307 * normal operation. Implementation resembles the second-half
2308 * of the ixgb_probe() routine.
2310 static void ixgb_io_resume(struct pci_dev
*pdev
)
2312 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2313 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2315 pci_set_master(pdev
);
2317 if (netif_running(netdev
)) {
2318 if (ixgb_up(adapter
)) {
2319 printk ("ixgb: can't bring device back up after reset\n");
2324 netif_device_attach(netdev
);
2325 mod_timer(&adapter
->watchdog_timer
, jiffies
);