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-k2"DRIVERNAPI
40 char ixgb_driver_version
[] = DRV_VERSION
;
41 static char ixgb_copyright
[] = "Copyright (c) 1999-2006 Intel Corporation.";
43 /* ixgb_pci_tbl - PCI Device ID Table
45 * Wildcard entries (PCI_ANY_ID) should come last
46 * Last entry must be all 0s
48 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
49 * Class, Class Mask, private data (not used) }
51 static struct pci_device_id ixgb_pci_tbl
[] = {
52 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX
,
53 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
54 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_CX4
,
55 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
56 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_SR
,
57 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
58 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_LR
,
59 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
61 /* required last entry */
65 MODULE_DEVICE_TABLE(pci
, ixgb_pci_tbl
);
67 /* Local Function Prototypes */
69 int ixgb_up(struct ixgb_adapter
*adapter
);
70 void ixgb_down(struct ixgb_adapter
*adapter
, boolean_t kill_watchdog
);
71 void ixgb_reset(struct ixgb_adapter
*adapter
);
72 int ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
);
73 int ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
);
74 void ixgb_free_tx_resources(struct ixgb_adapter
*adapter
);
75 void ixgb_free_rx_resources(struct ixgb_adapter
*adapter
);
76 void ixgb_update_stats(struct ixgb_adapter
*adapter
);
78 static int ixgb_init_module(void);
79 static void ixgb_exit_module(void);
80 static int ixgb_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
81 static void __devexit
ixgb_remove(struct pci_dev
*pdev
);
82 static int ixgb_sw_init(struct ixgb_adapter
*adapter
);
83 static int ixgb_open(struct net_device
*netdev
);
84 static int ixgb_close(struct net_device
*netdev
);
85 static void ixgb_configure_tx(struct ixgb_adapter
*adapter
);
86 static void ixgb_configure_rx(struct ixgb_adapter
*adapter
);
87 static void ixgb_setup_rctl(struct ixgb_adapter
*adapter
);
88 static void ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
);
89 static void ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
);
90 static void ixgb_set_multi(struct net_device
*netdev
);
91 static void ixgb_watchdog(unsigned long data
);
92 static int ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
);
93 static struct net_device_stats
*ixgb_get_stats(struct net_device
*netdev
);
94 static int ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
);
95 static int ixgb_set_mac(struct net_device
*netdev
, void *p
);
96 static irqreturn_t
ixgb_intr(int irq
, void *data
);
97 static boolean_t
ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
);
99 #ifdef CONFIG_IXGB_NAPI
100 static int ixgb_clean(struct net_device
*netdev
, int *budget
);
101 static boolean_t
ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
,
102 int *work_done
, int work_to_do
);
104 static boolean_t
ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
);
106 static void ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
);
107 void ixgb_set_ethtool_ops(struct net_device
*netdev
);
108 static void ixgb_tx_timeout(struct net_device
*dev
);
109 static void ixgb_tx_timeout_task(struct work_struct
*work
);
110 static void ixgb_vlan_rx_register(struct net_device
*netdev
,
111 struct vlan_group
*grp
);
112 static void ixgb_vlan_rx_add_vid(struct net_device
*netdev
, uint16_t vid
);
113 static void ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, uint16_t vid
);
114 static void ixgb_restore_vlan(struct ixgb_adapter
*adapter
);
116 #ifdef CONFIG_NET_POLL_CONTROLLER
117 /* for netdump / net console */
118 static void ixgb_netpoll(struct net_device
*dev
);
121 static pci_ers_result_t
ixgb_io_error_detected (struct pci_dev
*pdev
,
122 enum pci_channel_state state
);
123 static pci_ers_result_t
ixgb_io_slot_reset (struct pci_dev
*pdev
);
124 static void ixgb_io_resume (struct pci_dev
*pdev
);
126 /* Exported from other modules */
127 extern void ixgb_check_options(struct ixgb_adapter
*adapter
);
129 static struct pci_error_handlers ixgb_err_handler
= {
130 .error_detected
= ixgb_io_error_detected
,
131 .slot_reset
= ixgb_io_slot_reset
,
132 .resume
= ixgb_io_resume
,
135 static struct pci_driver ixgb_driver
= {
136 .name
= ixgb_driver_name
,
137 .id_table
= ixgb_pci_tbl
,
139 .remove
= __devexit_p(ixgb_remove
),
140 .err_handler
= &ixgb_err_handler
143 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
144 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
145 MODULE_LICENSE("GPL");
146 MODULE_VERSION(DRV_VERSION
);
148 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
149 static int debug
= DEFAULT_DEBUG_LEVEL_SHIFT
;
150 module_param(debug
, int, 0);
151 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
153 /* some defines for controlling descriptor fetches in h/w */
154 #define RXDCTL_WTHRESH_DEFAULT 15 /* chip writes back at this many or RXT0 */
155 #define RXDCTL_PTHRESH_DEFAULT 0 /* chip considers prefech below
157 #define RXDCTL_HTHRESH_DEFAULT 0 /* chip will only prefetch if tail
158 * is pushed this many descriptors
162 * ixgb_init_module - Driver Registration Routine
164 * ixgb_init_module is the first routine called when the driver is
165 * loaded. All it does is register with the PCI subsystem.
169 ixgb_init_module(void)
171 printk(KERN_INFO
"%s - version %s\n",
172 ixgb_driver_string
, ixgb_driver_version
);
174 printk(KERN_INFO
"%s\n", ixgb_copyright
);
176 return pci_register_driver(&ixgb_driver
);
179 module_init(ixgb_init_module
);
182 * ixgb_exit_module - Driver Exit Cleanup Routine
184 * ixgb_exit_module is called just before the driver is removed
189 ixgb_exit_module(void)
191 pci_unregister_driver(&ixgb_driver
);
194 module_exit(ixgb_exit_module
);
197 * ixgb_irq_disable - Mask off interrupt generation on the NIC
198 * @adapter: board private structure
202 ixgb_irq_disable(struct ixgb_adapter
*adapter
)
204 atomic_inc(&adapter
->irq_sem
);
205 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
206 IXGB_WRITE_FLUSH(&adapter
->hw
);
207 synchronize_irq(adapter
->pdev
->irq
);
211 * ixgb_irq_enable - Enable default interrupt generation settings
212 * @adapter: board private structure
216 ixgb_irq_enable(struct ixgb_adapter
*adapter
)
218 if(atomic_dec_and_test(&adapter
->irq_sem
)) {
219 IXGB_WRITE_REG(&adapter
->hw
, IMS
,
220 IXGB_INT_RXT0
| IXGB_INT_RXDMT0
| IXGB_INT_TXDW
|
222 IXGB_WRITE_FLUSH(&adapter
->hw
);
227 ixgb_up(struct ixgb_adapter
*adapter
)
229 struct net_device
*netdev
= adapter
->netdev
;
231 int max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
232 struct ixgb_hw
*hw
= &adapter
->hw
;
234 /* hardware has been reset, we need to reload some things */
236 ixgb_rar_set(hw
, netdev
->dev_addr
, 0);
237 ixgb_set_multi(netdev
);
239 ixgb_restore_vlan(adapter
);
241 ixgb_configure_tx(adapter
);
242 ixgb_setup_rctl(adapter
);
243 ixgb_configure_rx(adapter
);
244 ixgb_alloc_rx_buffers(adapter
);
246 /* disable interrupts and get the hardware into a known state */
247 IXGB_WRITE_REG(&adapter
->hw
, IMC
, 0xffffffff);
249 #ifdef CONFIG_PCI_MSI
251 boolean_t pcix
= (IXGB_READ_REG(&adapter
->hw
, STATUS
) &
252 IXGB_STATUS_PCIX_MODE
) ? TRUE
: FALSE
;
253 adapter
->have_msi
= TRUE
;
256 adapter
->have_msi
= FALSE
;
257 else if((err
= pci_enable_msi(adapter
->pdev
))) {
259 "Unable to allocate MSI interrupt Error: %d\n", err
);
260 adapter
->have_msi
= FALSE
;
261 /* proceed to try to request regular interrupt */
266 if((err
= request_irq(adapter
->pdev
->irq
, &ixgb_intr
,
267 IRQF_SHARED
| IRQF_SAMPLE_RANDOM
,
268 netdev
->name
, netdev
))) {
270 "Unable to allocate interrupt Error: %d\n", err
);
274 if((hw
->max_frame_size
!= max_frame
) ||
275 (hw
->max_frame_size
!=
276 (IXGB_READ_REG(hw
, MFS
) >> IXGB_MFS_SHIFT
))) {
278 hw
->max_frame_size
= max_frame
;
280 IXGB_WRITE_REG(hw
, MFS
, hw
->max_frame_size
<< IXGB_MFS_SHIFT
);
282 if(hw
->max_frame_size
>
283 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
) {
284 uint32_t ctrl0
= IXGB_READ_REG(hw
, CTRL0
);
286 if(!(ctrl0
& IXGB_CTRL0_JFE
)) {
287 ctrl0
|= IXGB_CTRL0_JFE
;
288 IXGB_WRITE_REG(hw
, CTRL0
, ctrl0
);
293 mod_timer(&adapter
->watchdog_timer
, jiffies
);
295 #ifdef CONFIG_IXGB_NAPI
296 netif_poll_enable(netdev
);
298 ixgb_irq_enable(adapter
);
304 ixgb_down(struct ixgb_adapter
*adapter
, boolean_t kill_watchdog
)
306 struct net_device
*netdev
= adapter
->netdev
;
308 ixgb_irq_disable(adapter
);
309 free_irq(adapter
->pdev
->irq
, netdev
);
310 #ifdef CONFIG_PCI_MSI
311 if(adapter
->have_msi
== TRUE
)
312 pci_disable_msi(adapter
->pdev
);
316 del_timer_sync(&adapter
->watchdog_timer
);
317 #ifdef CONFIG_IXGB_NAPI
318 netif_poll_disable(netdev
);
320 adapter
->link_speed
= 0;
321 adapter
->link_duplex
= 0;
322 netif_carrier_off(netdev
);
323 netif_stop_queue(netdev
);
326 ixgb_clean_tx_ring(adapter
);
327 ixgb_clean_rx_ring(adapter
);
331 ixgb_reset(struct ixgb_adapter
*adapter
)
334 ixgb_adapter_stop(&adapter
->hw
);
335 if(!ixgb_init_hw(&adapter
->hw
))
336 DPRINTK(PROBE
, ERR
, "ixgb_init_hw failed.\n");
340 * ixgb_probe - Device Initialization Routine
341 * @pdev: PCI device information struct
342 * @ent: entry in ixgb_pci_tbl
344 * Returns 0 on success, negative on failure
346 * ixgb_probe initializes an adapter identified by a pci_dev structure.
347 * The OS initialization, configuring of the adapter private structure,
348 * and a hardware reset occur.
352 ixgb_probe(struct pci_dev
*pdev
,
353 const struct pci_device_id
*ent
)
355 struct net_device
*netdev
= NULL
;
356 struct ixgb_adapter
*adapter
;
357 static int cards_found
= 0;
358 unsigned long mmio_start
;
364 if((err
= pci_enable_device(pdev
)))
367 if(!(err
= pci_set_dma_mask(pdev
, DMA_64BIT_MASK
)) &&
368 !(err
= pci_set_consistent_dma_mask(pdev
, DMA_64BIT_MASK
))) {
371 if((err
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
)) ||
372 (err
= pci_set_consistent_dma_mask(pdev
, DMA_32BIT_MASK
))) {
374 "ixgb: No usable DMA configuration, aborting\n");
380 if((err
= pci_request_regions(pdev
, ixgb_driver_name
)))
381 goto err_request_regions
;
383 pci_set_master(pdev
);
385 netdev
= alloc_etherdev(sizeof(struct ixgb_adapter
));
388 goto err_alloc_etherdev
;
391 SET_MODULE_OWNER(netdev
);
392 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
394 pci_set_drvdata(pdev
, netdev
);
395 adapter
= netdev_priv(netdev
);
396 adapter
->netdev
= netdev
;
397 adapter
->pdev
= pdev
;
398 adapter
->hw
.back
= adapter
;
399 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_DEBUG_LEVEL_SHIFT
);
401 mmio_start
= pci_resource_start(pdev
, BAR_0
);
402 mmio_len
= pci_resource_len(pdev
, BAR_0
);
404 adapter
->hw
.hw_addr
= ioremap(mmio_start
, mmio_len
);
405 if(!adapter
->hw
.hw_addr
) {
410 for(i
= BAR_1
; i
<= BAR_5
; i
++) {
411 if(pci_resource_len(pdev
, i
) == 0)
413 if(pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
414 adapter
->hw
.io_base
= pci_resource_start(pdev
, i
);
419 netdev
->open
= &ixgb_open
;
420 netdev
->stop
= &ixgb_close
;
421 netdev
->hard_start_xmit
= &ixgb_xmit_frame
;
422 netdev
->get_stats
= &ixgb_get_stats
;
423 netdev
->set_multicast_list
= &ixgb_set_multi
;
424 netdev
->set_mac_address
= &ixgb_set_mac
;
425 netdev
->change_mtu
= &ixgb_change_mtu
;
426 ixgb_set_ethtool_ops(netdev
);
427 netdev
->tx_timeout
= &ixgb_tx_timeout
;
428 netdev
->watchdog_timeo
= 5 * HZ
;
429 #ifdef CONFIG_IXGB_NAPI
430 netdev
->poll
= &ixgb_clean
;
433 netdev
->vlan_rx_register
= ixgb_vlan_rx_register
;
434 netdev
->vlan_rx_add_vid
= ixgb_vlan_rx_add_vid
;
435 netdev
->vlan_rx_kill_vid
= ixgb_vlan_rx_kill_vid
;
436 #ifdef CONFIG_NET_POLL_CONTROLLER
437 netdev
->poll_controller
= ixgb_netpoll
;
440 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
441 netdev
->mem_start
= mmio_start
;
442 netdev
->mem_end
= mmio_start
+ mmio_len
;
443 netdev
->base_addr
= adapter
->hw
.io_base
;
445 adapter
->bd_number
= cards_found
;
446 adapter
->link_speed
= 0;
447 adapter
->link_duplex
= 0;
449 /* setup the private structure */
451 if((err
= ixgb_sw_init(adapter
)))
454 netdev
->features
= NETIF_F_SG
|
458 NETIF_F_HW_VLAN_FILTER
;
459 netdev
->features
|= NETIF_F_TSO
;
461 netdev
->features
|= NETIF_F_LLTX
;
465 netdev
->features
|= NETIF_F_HIGHDMA
;
467 /* make sure the EEPROM is good */
469 if(!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
470 DPRINTK(PROBE
, ERR
, "The EEPROM Checksum Is Not Valid\n");
475 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
476 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
478 if(!is_valid_ether_addr(netdev
->perm_addr
)) {
479 DPRINTK(PROBE
, ERR
, "Invalid MAC Address\n");
484 adapter
->part_num
= ixgb_get_ee_pba_number(&adapter
->hw
);
486 init_timer(&adapter
->watchdog_timer
);
487 adapter
->watchdog_timer
.function
= &ixgb_watchdog
;
488 adapter
->watchdog_timer
.data
= (unsigned long)adapter
;
490 INIT_WORK(&adapter
->tx_timeout_task
, ixgb_tx_timeout_task
);
492 strcpy(netdev
->name
, "eth%d");
493 if((err
= register_netdev(netdev
)))
496 /* we're going to reset, so assume we have no link for now */
498 netif_carrier_off(netdev
);
499 netif_stop_queue(netdev
);
501 DPRINTK(PROBE
, INFO
, "Intel(R) PRO/10GbE Network Connection\n");
502 ixgb_check_options(adapter
);
503 /* reset the hardware with the new settings */
513 iounmap(adapter
->hw
.hw_addr
);
517 pci_release_regions(pdev
);
520 pci_disable_device(pdev
);
525 * ixgb_remove - Device Removal Routine
526 * @pdev: PCI device information struct
528 * ixgb_remove is called by the PCI subsystem to alert the driver
529 * that it should release a PCI device. The could be caused by a
530 * Hot-Plug event, or because the driver is going to be removed from
534 static void __devexit
535 ixgb_remove(struct pci_dev
*pdev
)
537 struct net_device
*netdev
= pci_get_drvdata(pdev
);
538 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
540 unregister_netdev(netdev
);
542 iounmap(adapter
->hw
.hw_addr
);
543 pci_release_regions(pdev
);
549 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
550 * @adapter: board private structure to initialize
552 * ixgb_sw_init initializes the Adapter private data structure.
553 * Fields are initialized based on PCI device information and
554 * OS network device settings (MTU size).
558 ixgb_sw_init(struct ixgb_adapter
*adapter
)
560 struct ixgb_hw
*hw
= &adapter
->hw
;
561 struct net_device
*netdev
= adapter
->netdev
;
562 struct pci_dev
*pdev
= adapter
->pdev
;
564 /* PCI config space info */
566 hw
->vendor_id
= pdev
->vendor
;
567 hw
->device_id
= pdev
->device
;
568 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
569 hw
->subsystem_id
= pdev
->subsystem_device
;
571 hw
->max_frame_size
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
572 adapter
->rx_buffer_len
= hw
->max_frame_size
;
574 if((hw
->device_id
== IXGB_DEVICE_ID_82597EX
)
575 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_CX4
)
576 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_LR
)
577 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_SR
))
578 hw
->mac_type
= ixgb_82597
;
580 /* should never have loaded on this device */
581 DPRINTK(PROBE
, ERR
, "unsupported device id\n");
584 /* enable flow control to be programmed */
587 atomic_set(&adapter
->irq_sem
, 1);
588 spin_lock_init(&adapter
->tx_lock
);
594 * ixgb_open - Called when a network interface is made active
595 * @netdev: network interface device structure
597 * Returns 0 on success, negative value on failure
599 * The open entry point is called when a network interface is made
600 * active by the system (IFF_UP). At this point all resources needed
601 * for transmit and receive operations are allocated, the interrupt
602 * handler is registered with the OS, the watchdog timer is started,
603 * and the stack is notified that the interface is ready.
607 ixgb_open(struct net_device
*netdev
)
609 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
612 /* allocate transmit descriptors */
614 if((err
= ixgb_setup_tx_resources(adapter
)))
617 /* allocate receive descriptors */
619 if((err
= ixgb_setup_rx_resources(adapter
)))
622 if((err
= ixgb_up(adapter
)))
628 ixgb_free_rx_resources(adapter
);
630 ixgb_free_tx_resources(adapter
);
638 * ixgb_close - Disables a network interface
639 * @netdev: network interface device structure
641 * Returns 0, this is not allowed to fail
643 * The close entry point is called when an interface is de-activated
644 * by the OS. The hardware is still under the drivers control, but
645 * needs to be disabled. A global MAC reset is issued to stop the
646 * hardware, and all transmit and receive resources are freed.
650 ixgb_close(struct net_device
*netdev
)
652 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
654 ixgb_down(adapter
, TRUE
);
656 ixgb_free_tx_resources(adapter
);
657 ixgb_free_rx_resources(adapter
);
663 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
664 * @adapter: board private structure
666 * Return 0 on success, negative on failure
670 ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
)
672 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
673 struct pci_dev
*pdev
= adapter
->pdev
;
676 size
= sizeof(struct ixgb_buffer
) * txdr
->count
;
677 txdr
->buffer_info
= vmalloc(size
);
678 if(!txdr
->buffer_info
) {
680 "Unable to allocate transmit descriptor ring memory\n");
683 memset(txdr
->buffer_info
, 0, size
);
685 /* round up to nearest 4K */
687 txdr
->size
= txdr
->count
* sizeof(struct ixgb_tx_desc
);
688 IXGB_ROUNDUP(txdr
->size
, 4096);
690 txdr
->desc
= pci_alloc_consistent(pdev
, txdr
->size
, &txdr
->dma
);
692 vfree(txdr
->buffer_info
);
694 "Unable to allocate transmit descriptor memory\n");
697 memset(txdr
->desc
, 0, txdr
->size
);
699 txdr
->next_to_use
= 0;
700 txdr
->next_to_clean
= 0;
706 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
707 * @adapter: board private structure
709 * Configure the Tx unit of the MAC after a reset.
713 ixgb_configure_tx(struct ixgb_adapter
*adapter
)
715 uint64_t tdba
= adapter
->tx_ring
.dma
;
716 uint32_t tdlen
= adapter
->tx_ring
.count
* sizeof(struct ixgb_tx_desc
);
718 struct ixgb_hw
*hw
= &adapter
->hw
;
720 /* Setup the Base and Length of the Tx Descriptor Ring
721 * tx_ring.dma can be either a 32 or 64 bit value
724 IXGB_WRITE_REG(hw
, TDBAL
, (tdba
& 0x00000000ffffffffULL
));
725 IXGB_WRITE_REG(hw
, TDBAH
, (tdba
>> 32));
727 IXGB_WRITE_REG(hw
, TDLEN
, tdlen
);
729 /* Setup the HW Tx Head and Tail descriptor pointers */
731 IXGB_WRITE_REG(hw
, TDH
, 0);
732 IXGB_WRITE_REG(hw
, TDT
, 0);
734 /* don't set up txdctl, it induces performance problems if configured
736 /* Set the Tx Interrupt Delay register */
738 IXGB_WRITE_REG(hw
, TIDV
, adapter
->tx_int_delay
);
740 /* Program the Transmit Control Register */
742 tctl
= IXGB_TCTL_TCE
| IXGB_TCTL_TXEN
| IXGB_TCTL_TPDE
;
743 IXGB_WRITE_REG(hw
, TCTL
, tctl
);
745 /* Setup Transmit Descriptor Settings for this adapter */
746 adapter
->tx_cmd_type
=
748 | (adapter
->tx_int_delay_enable
? IXGB_TX_DESC_CMD_IDE
: 0);
752 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
753 * @adapter: board private structure
755 * Returns 0 on success, negative on failure
759 ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
)
761 struct ixgb_desc_ring
*rxdr
= &adapter
->rx_ring
;
762 struct pci_dev
*pdev
= adapter
->pdev
;
765 size
= sizeof(struct ixgb_buffer
) * rxdr
->count
;
766 rxdr
->buffer_info
= vmalloc(size
);
767 if(!rxdr
->buffer_info
) {
769 "Unable to allocate receive descriptor ring\n");
772 memset(rxdr
->buffer_info
, 0, size
);
774 /* Round up to nearest 4K */
776 rxdr
->size
= rxdr
->count
* sizeof(struct ixgb_rx_desc
);
777 IXGB_ROUNDUP(rxdr
->size
, 4096);
779 rxdr
->desc
= pci_alloc_consistent(pdev
, rxdr
->size
, &rxdr
->dma
);
782 vfree(rxdr
->buffer_info
);
784 "Unable to allocate receive descriptors\n");
787 memset(rxdr
->desc
, 0, rxdr
->size
);
789 rxdr
->next_to_clean
= 0;
790 rxdr
->next_to_use
= 0;
796 * ixgb_setup_rctl - configure the receive control register
797 * @adapter: Board private structure
801 ixgb_setup_rctl(struct ixgb_adapter
*adapter
)
805 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
807 rctl
&= ~(3 << IXGB_RCTL_MO_SHIFT
);
810 IXGB_RCTL_BAM
| IXGB_RCTL_RDMTS_1_2
|
811 IXGB_RCTL_RXEN
| IXGB_RCTL_CFF
|
812 (adapter
->hw
.mc_filter_type
<< IXGB_RCTL_MO_SHIFT
);
814 rctl
|= IXGB_RCTL_SECRC
;
816 if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_2048
)
817 rctl
|= IXGB_RCTL_BSIZE_2048
;
818 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_4096
)
819 rctl
|= IXGB_RCTL_BSIZE_4096
;
820 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_8192
)
821 rctl
|= IXGB_RCTL_BSIZE_8192
;
822 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_16384
)
823 rctl
|= IXGB_RCTL_BSIZE_16384
;
825 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
829 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
830 * @adapter: board private structure
832 * Configure the Rx unit of the MAC after a reset.
836 ixgb_configure_rx(struct ixgb_adapter
*adapter
)
838 uint64_t rdba
= adapter
->rx_ring
.dma
;
839 uint32_t rdlen
= adapter
->rx_ring
.count
* sizeof(struct ixgb_rx_desc
);
840 struct ixgb_hw
*hw
= &adapter
->hw
;
845 /* make sure receives are disabled while setting up the descriptors */
847 rctl
= IXGB_READ_REG(hw
, RCTL
);
848 IXGB_WRITE_REG(hw
, RCTL
, rctl
& ~IXGB_RCTL_RXEN
);
850 /* set the Receive Delay Timer Register */
852 IXGB_WRITE_REG(hw
, RDTR
, adapter
->rx_int_delay
);
854 /* Setup the Base and Length of the Rx Descriptor Ring */
856 IXGB_WRITE_REG(hw
, RDBAL
, (rdba
& 0x00000000ffffffffULL
));
857 IXGB_WRITE_REG(hw
, RDBAH
, (rdba
>> 32));
859 IXGB_WRITE_REG(hw
, RDLEN
, rdlen
);
861 /* Setup the HW Rx Head and Tail Descriptor Pointers */
862 IXGB_WRITE_REG(hw
, RDH
, 0);
863 IXGB_WRITE_REG(hw
, RDT
, 0);
865 /* set up pre-fetching of receive buffers so we get some before we
866 * run out (default hardware behavior is to run out before fetching
867 * more). This sets up to fetch if HTHRESH rx descriptors are avail
868 * and the descriptors in hw cache are below PTHRESH. This avoids
869 * the hardware behavior of fetching <=512 descriptors in a single
870 * burst that pre-empts all other activity, usually causing fifo
872 /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
873 rxdctl
= RXDCTL_WTHRESH_DEFAULT
<< IXGB_RXDCTL_WTHRESH_SHIFT
|
874 RXDCTL_HTHRESH_DEFAULT
<< IXGB_RXDCTL_HTHRESH_SHIFT
|
875 RXDCTL_PTHRESH_DEFAULT
<< IXGB_RXDCTL_PTHRESH_SHIFT
;
876 IXGB_WRITE_REG(hw
, RXDCTL
, rxdctl
);
878 /* Enable Receive Checksum Offload for TCP and UDP */
879 if(adapter
->rx_csum
== TRUE
) {
880 rxcsum
= IXGB_READ_REG(hw
, RXCSUM
);
881 rxcsum
|= IXGB_RXCSUM_TUOFL
;
882 IXGB_WRITE_REG(hw
, RXCSUM
, rxcsum
);
885 /* Enable Receives */
887 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
891 * ixgb_free_tx_resources - Free Tx Resources
892 * @adapter: board private structure
894 * Free all transmit software resources
898 ixgb_free_tx_resources(struct ixgb_adapter
*adapter
)
900 struct pci_dev
*pdev
= adapter
->pdev
;
902 ixgb_clean_tx_ring(adapter
);
904 vfree(adapter
->tx_ring
.buffer_info
);
905 adapter
->tx_ring
.buffer_info
= NULL
;
907 pci_free_consistent(pdev
, adapter
->tx_ring
.size
,
908 adapter
->tx_ring
.desc
, adapter
->tx_ring
.dma
);
910 adapter
->tx_ring
.desc
= NULL
;
914 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter
*adapter
,
915 struct ixgb_buffer
*buffer_info
)
917 struct pci_dev
*pdev
= adapter
->pdev
;
919 if (buffer_info
->dma
)
920 pci_unmap_page(pdev
, buffer_info
->dma
, buffer_info
->length
,
923 if (buffer_info
->skb
)
924 dev_kfree_skb_any(buffer_info
->skb
);
926 buffer_info
->skb
= NULL
;
927 buffer_info
->dma
= 0;
928 buffer_info
->time_stamp
= 0;
929 /* these fields must always be initialized in tx
930 * buffer_info->length = 0;
931 * buffer_info->next_to_watch = 0; */
935 * ixgb_clean_tx_ring - Free Tx Buffers
936 * @adapter: board private structure
940 ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
)
942 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
943 struct ixgb_buffer
*buffer_info
;
947 /* Free all the Tx ring sk_buffs */
949 for(i
= 0; i
< tx_ring
->count
; i
++) {
950 buffer_info
= &tx_ring
->buffer_info
[i
];
951 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
954 size
= sizeof(struct ixgb_buffer
) * tx_ring
->count
;
955 memset(tx_ring
->buffer_info
, 0, size
);
957 /* Zero out the descriptor ring */
959 memset(tx_ring
->desc
, 0, tx_ring
->size
);
961 tx_ring
->next_to_use
= 0;
962 tx_ring
->next_to_clean
= 0;
964 IXGB_WRITE_REG(&adapter
->hw
, TDH
, 0);
965 IXGB_WRITE_REG(&adapter
->hw
, TDT
, 0);
969 * ixgb_free_rx_resources - Free Rx Resources
970 * @adapter: board private structure
972 * Free all receive software resources
976 ixgb_free_rx_resources(struct ixgb_adapter
*adapter
)
978 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
979 struct pci_dev
*pdev
= adapter
->pdev
;
981 ixgb_clean_rx_ring(adapter
);
983 vfree(rx_ring
->buffer_info
);
984 rx_ring
->buffer_info
= NULL
;
986 pci_free_consistent(pdev
, rx_ring
->size
, rx_ring
->desc
, rx_ring
->dma
);
988 rx_ring
->desc
= NULL
;
992 * ixgb_clean_rx_ring - Free Rx Buffers
993 * @adapter: board private structure
997 ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
)
999 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1000 struct ixgb_buffer
*buffer_info
;
1001 struct pci_dev
*pdev
= adapter
->pdev
;
1005 /* Free all the Rx ring sk_buffs */
1007 for(i
= 0; i
< rx_ring
->count
; i
++) {
1008 buffer_info
= &rx_ring
->buffer_info
[i
];
1009 if(buffer_info
->skb
) {
1011 pci_unmap_single(pdev
,
1013 buffer_info
->length
,
1014 PCI_DMA_FROMDEVICE
);
1016 dev_kfree_skb(buffer_info
->skb
);
1018 buffer_info
->skb
= NULL
;
1022 size
= sizeof(struct ixgb_buffer
) * rx_ring
->count
;
1023 memset(rx_ring
->buffer_info
, 0, size
);
1025 /* Zero out the descriptor ring */
1027 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1029 rx_ring
->next_to_clean
= 0;
1030 rx_ring
->next_to_use
= 0;
1032 IXGB_WRITE_REG(&adapter
->hw
, RDH
, 0);
1033 IXGB_WRITE_REG(&adapter
->hw
, RDT
, 0);
1037 * ixgb_set_mac - Change the Ethernet Address of the NIC
1038 * @netdev: network interface device structure
1039 * @p: pointer to an address structure
1041 * Returns 0 on success, negative on failure
1045 ixgb_set_mac(struct net_device
*netdev
, void *p
)
1047 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1048 struct sockaddr
*addr
= p
;
1050 if(!is_valid_ether_addr(addr
->sa_data
))
1051 return -EADDRNOTAVAIL
;
1053 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1055 ixgb_rar_set(&adapter
->hw
, addr
->sa_data
, 0);
1061 * ixgb_set_multi - Multicast and Promiscuous mode set
1062 * @netdev: network interface device structure
1064 * The set_multi entry point is called whenever the multicast address
1065 * list or the network interface flags are updated. This routine is
1066 * responsible for configuring the hardware for proper multicast,
1067 * promiscuous mode, and all-multi behavior.
1071 ixgb_set_multi(struct net_device
*netdev
)
1073 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1074 struct ixgb_hw
*hw
= &adapter
->hw
;
1075 struct dev_mc_list
*mc_ptr
;
1079 /* Check for Promiscuous and All Multicast modes */
1081 rctl
= IXGB_READ_REG(hw
, RCTL
);
1083 if(netdev
->flags
& IFF_PROMISC
) {
1084 rctl
|= (IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1085 } else if(netdev
->flags
& IFF_ALLMULTI
) {
1086 rctl
|= IXGB_RCTL_MPE
;
1087 rctl
&= ~IXGB_RCTL_UPE
;
1089 rctl
&= ~(IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1092 if(netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
) {
1093 rctl
|= IXGB_RCTL_MPE
;
1094 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1096 uint8_t mta
[netdev
->mc_count
* IXGB_ETH_LENGTH_OF_ADDRESS
];
1098 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1100 for(i
= 0, mc_ptr
= netdev
->mc_list
; mc_ptr
;
1101 i
++, mc_ptr
= mc_ptr
->next
)
1102 memcpy(&mta
[i
* IXGB_ETH_LENGTH_OF_ADDRESS
],
1103 mc_ptr
->dmi_addr
, IXGB_ETH_LENGTH_OF_ADDRESS
);
1105 ixgb_mc_addr_list_update(hw
, mta
, netdev
->mc_count
, 0);
1110 * ixgb_watchdog - Timer Call-back
1111 * @data: pointer to netdev cast into an unsigned long
1115 ixgb_watchdog(unsigned long data
)
1117 struct ixgb_adapter
*adapter
= (struct ixgb_adapter
*)data
;
1118 struct net_device
*netdev
= adapter
->netdev
;
1119 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
1121 ixgb_check_for_link(&adapter
->hw
);
1123 if (ixgb_check_for_bad_link(&adapter
->hw
)) {
1124 /* force the reset path */
1125 netif_stop_queue(netdev
);
1128 if(adapter
->hw
.link_up
) {
1129 if(!netif_carrier_ok(netdev
)) {
1131 "NIC Link is Up 10000 Mbps Full Duplex\n");
1132 adapter
->link_speed
= 10000;
1133 adapter
->link_duplex
= FULL_DUPLEX
;
1134 netif_carrier_on(netdev
);
1135 netif_wake_queue(netdev
);
1138 if(netif_carrier_ok(netdev
)) {
1139 adapter
->link_speed
= 0;
1140 adapter
->link_duplex
= 0;
1141 DPRINTK(LINK
, INFO
, "NIC Link is Down\n");
1142 netif_carrier_off(netdev
);
1143 netif_stop_queue(netdev
);
1148 ixgb_update_stats(adapter
);
1150 if(!netif_carrier_ok(netdev
)) {
1151 if(IXGB_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
1152 /* We've lost link, so the controller stops DMA,
1153 * but we've got queued Tx work that's never going
1154 * to get done, so reset controller to flush Tx.
1155 * (Do the reset outside of interrupt context). */
1156 schedule_work(&adapter
->tx_timeout_task
);
1160 /* Force detection of hung controller every watchdog period */
1161 adapter
->detect_tx_hung
= TRUE
;
1163 /* generate an interrupt to force clean up of any stragglers */
1164 IXGB_WRITE_REG(&adapter
->hw
, ICS
, IXGB_INT_TXDW
);
1166 /* Reset the timer */
1167 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 2 * HZ
);
1170 #define IXGB_TX_FLAGS_CSUM 0x00000001
1171 #define IXGB_TX_FLAGS_VLAN 0x00000002
1172 #define IXGB_TX_FLAGS_TSO 0x00000004
1175 ixgb_tso(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1177 struct ixgb_context_desc
*context_desc
;
1179 uint8_t ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
1180 uint16_t ipcse
, tucse
, mss
;
1183 if (likely(skb_is_gso(skb
))) {
1184 struct ixgb_buffer
*buffer_info
;
1187 if (skb_header_cloned(skb
)) {
1188 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
1193 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
1194 mss
= skb_shinfo(skb
)->gso_size
;
1198 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
1201 ipcss
= skb_network_offset(skb
);
1202 ipcso
= (void *)&(iph
->check
) - (void *)skb
->data
;
1203 ipcse
= skb_transport_offset(skb
) - 1;
1204 tucss
= skb_transport_offset(skb
);
1205 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
1208 i
= adapter
->tx_ring
.next_to_use
;
1209 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1210 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1211 WARN_ON(buffer_info
->dma
!= 0);
1213 context_desc
->ipcss
= ipcss
;
1214 context_desc
->ipcso
= ipcso
;
1215 context_desc
->ipcse
= cpu_to_le16(ipcse
);
1216 context_desc
->tucss
= tucss
;
1217 context_desc
->tucso
= tucso
;
1218 context_desc
->tucse
= cpu_to_le16(tucse
);
1219 context_desc
->mss
= cpu_to_le16(mss
);
1220 context_desc
->hdr_len
= hdr_len
;
1221 context_desc
->status
= 0;
1222 context_desc
->cmd_type_len
= cpu_to_le32(
1223 IXGB_CONTEXT_DESC_TYPE
1224 | IXGB_CONTEXT_DESC_CMD_TSE
1225 | IXGB_CONTEXT_DESC_CMD_IP
1226 | IXGB_CONTEXT_DESC_CMD_TCP
1227 | IXGB_CONTEXT_DESC_CMD_IDE
1228 | (skb
->len
- (hdr_len
)));
1231 if(++i
== adapter
->tx_ring
.count
) i
= 0;
1232 adapter
->tx_ring
.next_to_use
= i
;
1241 ixgb_tx_csum(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1243 struct ixgb_context_desc
*context_desc
;
1247 if(likely(skb
->ip_summed
== CHECKSUM_PARTIAL
)) {
1248 struct ixgb_buffer
*buffer_info
;
1249 css
= skb_transport_offset(skb
);
1250 cso
= css
+ skb
->csum_offset
;
1252 i
= adapter
->tx_ring
.next_to_use
;
1253 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1254 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1255 WARN_ON(buffer_info
->dma
!= 0);
1257 context_desc
->tucss
= css
;
1258 context_desc
->tucso
= cso
;
1259 context_desc
->tucse
= 0;
1260 /* zero out any previously existing data in one instruction */
1261 *(uint32_t *)&(context_desc
->ipcss
) = 0;
1262 context_desc
->status
= 0;
1263 context_desc
->hdr_len
= 0;
1264 context_desc
->mss
= 0;
1265 context_desc
->cmd_type_len
=
1266 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1267 | IXGB_TX_DESC_CMD_IDE
);
1269 if(++i
== adapter
->tx_ring
.count
) i
= 0;
1270 adapter
->tx_ring
.next_to_use
= i
;
1278 #define IXGB_MAX_TXD_PWR 14
1279 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1282 ixgb_tx_map(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
,
1285 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1286 struct ixgb_buffer
*buffer_info
;
1288 unsigned int offset
= 0, size
, count
= 0, i
;
1289 unsigned int mss
= skb_shinfo(skb
)->gso_size
;
1291 unsigned int nr_frags
= skb_shinfo(skb
)->nr_frags
;
1294 len
-= skb
->data_len
;
1296 i
= tx_ring
->next_to_use
;
1299 buffer_info
= &tx_ring
->buffer_info
[i
];
1300 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1301 /* Workaround for premature desc write-backs
1302 * in TSO mode. Append 4-byte sentinel desc */
1303 if (unlikely(mss
&& !nr_frags
&& size
== len
&& size
> 8))
1306 buffer_info
->length
= size
;
1307 WARN_ON(buffer_info
->dma
!= 0);
1309 pci_map_single(adapter
->pdev
,
1313 buffer_info
->time_stamp
= jiffies
;
1314 buffer_info
->next_to_watch
= 0;
1319 if(++i
== tx_ring
->count
) i
= 0;
1322 for(f
= 0; f
< nr_frags
; f
++) {
1323 struct skb_frag_struct
*frag
;
1325 frag
= &skb_shinfo(skb
)->frags
[f
];
1330 buffer_info
= &tx_ring
->buffer_info
[i
];
1331 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1333 /* Workaround for premature desc write-backs
1334 * in TSO mode. Append 4-byte sentinel desc */
1335 if (unlikely(mss
&& !nr_frags
&& size
== len
1339 buffer_info
->length
= size
;
1341 pci_map_page(adapter
->pdev
,
1343 frag
->page_offset
+ offset
,
1346 buffer_info
->time_stamp
= jiffies
;
1347 buffer_info
->next_to_watch
= 0;
1352 if(++i
== tx_ring
->count
) i
= 0;
1355 i
= (i
== 0) ? tx_ring
->count
- 1 : i
- 1;
1356 tx_ring
->buffer_info
[i
].skb
= skb
;
1357 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
1363 ixgb_tx_queue(struct ixgb_adapter
*adapter
, int count
, int vlan_id
,int tx_flags
)
1365 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1366 struct ixgb_tx_desc
*tx_desc
= NULL
;
1367 struct ixgb_buffer
*buffer_info
;
1368 uint32_t cmd_type_len
= adapter
->tx_cmd_type
;
1373 if(tx_flags
& IXGB_TX_FLAGS_TSO
) {
1374 cmd_type_len
|= IXGB_TX_DESC_CMD_TSE
;
1375 popts
|= (IXGB_TX_DESC_POPTS_IXSM
| IXGB_TX_DESC_POPTS_TXSM
);
1378 if(tx_flags
& IXGB_TX_FLAGS_CSUM
)
1379 popts
|= IXGB_TX_DESC_POPTS_TXSM
;
1381 if(tx_flags
& IXGB_TX_FLAGS_VLAN
) {
1382 cmd_type_len
|= IXGB_TX_DESC_CMD_VLE
;
1385 i
= tx_ring
->next_to_use
;
1388 buffer_info
= &tx_ring
->buffer_info
[i
];
1389 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1390 tx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
1391 tx_desc
->cmd_type_len
=
1392 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
1393 tx_desc
->status
= status
;
1394 tx_desc
->popts
= popts
;
1395 tx_desc
->vlan
= cpu_to_le16(vlan_id
);
1397 if(++i
== tx_ring
->count
) i
= 0;
1400 tx_desc
->cmd_type_len
|= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1401 | IXGB_TX_DESC_CMD_RS
);
1403 /* Force memory writes to complete before letting h/w
1404 * know there are new descriptors to fetch. (Only
1405 * applicable for weak-ordered memory model archs,
1406 * such as IA-64). */
1409 tx_ring
->next_to_use
= i
;
1410 IXGB_WRITE_REG(&adapter
->hw
, TDT
, i
);
1413 static int __ixgb_maybe_stop_tx(struct net_device
*netdev
, int size
)
1415 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1416 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1418 netif_stop_queue(netdev
);
1419 /* Herbert's original patch had:
1420 * smp_mb__after_netif_stop_queue();
1421 * but since that doesn't exist yet, just open code it. */
1424 /* We need to check again in a case another CPU has just
1425 * made room available. */
1426 if (likely(IXGB_DESC_UNUSED(tx_ring
) < size
))
1430 netif_start_queue(netdev
);
1431 ++adapter
->restart_queue
;
1435 static int ixgb_maybe_stop_tx(struct net_device
*netdev
,
1436 struct ixgb_desc_ring
*tx_ring
, int size
)
1438 if (likely(IXGB_DESC_UNUSED(tx_ring
) >= size
))
1440 return __ixgb_maybe_stop_tx(netdev
, size
);
1444 /* Tx Descriptors needed, worst case */
1445 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1446 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1447 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1448 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1449 + 1 /* one more needed for sentinel TSO workaround */
1452 ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
1454 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1456 unsigned int tx_flags
= 0;
1457 unsigned long flags
;
1462 dev_kfree_skb_any(skb
);
1467 local_irq_save(flags
);
1468 if (!spin_trylock(&adapter
->tx_lock
)) {
1469 /* Collision - tell upper layer to requeue */
1470 local_irq_restore(flags
);
1471 return NETDEV_TX_LOCKED
;
1474 spin_lock_irqsave(&adapter
->tx_lock
, flags
);
1477 if (unlikely(ixgb_maybe_stop_tx(netdev
, &adapter
->tx_ring
,
1479 netif_stop_queue(netdev
);
1480 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1481 return NETDEV_TX_BUSY
;
1484 #ifndef NETIF_F_LLTX
1485 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1488 if(adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
1489 tx_flags
|= IXGB_TX_FLAGS_VLAN
;
1490 vlan_id
= vlan_tx_tag_get(skb
);
1493 first
= adapter
->tx_ring
.next_to_use
;
1495 tso
= ixgb_tso(adapter
, skb
);
1497 dev_kfree_skb_any(skb
);
1499 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1501 return NETDEV_TX_OK
;
1505 tx_flags
|= IXGB_TX_FLAGS_TSO
;
1506 else if(ixgb_tx_csum(adapter
, skb
))
1507 tx_flags
|= IXGB_TX_FLAGS_CSUM
;
1509 ixgb_tx_queue(adapter
, ixgb_tx_map(adapter
, skb
, first
), vlan_id
,
1512 netdev
->trans_start
= jiffies
;
1515 /* Make sure there is space in the ring for the next send. */
1516 ixgb_maybe_stop_tx(netdev
, &adapter
->tx_ring
, DESC_NEEDED
);
1518 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1521 return NETDEV_TX_OK
;
1525 * ixgb_tx_timeout - Respond to a Tx Hang
1526 * @netdev: network interface device structure
1530 ixgb_tx_timeout(struct net_device
*netdev
)
1532 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1534 /* Do the reset outside of interrupt context */
1535 schedule_work(&adapter
->tx_timeout_task
);
1539 ixgb_tx_timeout_task(struct work_struct
*work
)
1541 struct ixgb_adapter
*adapter
=
1542 container_of(work
, struct ixgb_adapter
, tx_timeout_task
);
1544 adapter
->tx_timeout_count
++;
1545 ixgb_down(adapter
, TRUE
);
1550 * ixgb_get_stats - Get System Network Statistics
1551 * @netdev: network interface device structure
1553 * Returns the address of the device statistics structure.
1554 * The statistics are actually updated from the timer callback.
1557 static struct net_device_stats
*
1558 ixgb_get_stats(struct net_device
*netdev
)
1560 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1562 return &adapter
->net_stats
;
1566 * ixgb_change_mtu - Change the Maximum Transfer Unit
1567 * @netdev: network interface device structure
1568 * @new_mtu: new value for maximum frame size
1570 * Returns 0 on success, negative on failure
1574 ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
)
1576 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1577 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1578 int old_max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1581 if((max_frame
< IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
)
1582 || (max_frame
> IXGB_MAX_JUMBO_FRAME_SIZE
+ ENET_FCS_LENGTH
)) {
1583 DPRINTK(PROBE
, ERR
, "Invalid MTU setting %d\n", new_mtu
);
1587 adapter
->rx_buffer_len
= max_frame
;
1589 netdev
->mtu
= new_mtu
;
1591 if ((old_max_frame
!= max_frame
) && netif_running(netdev
)) {
1592 ixgb_down(adapter
, TRUE
);
1600 * ixgb_update_stats - Update the board statistics counters.
1601 * @adapter: board private structure
1605 ixgb_update_stats(struct ixgb_adapter
*adapter
)
1607 struct net_device
*netdev
= adapter
->netdev
;
1608 struct pci_dev
*pdev
= adapter
->pdev
;
1610 /* Prevent stats update while adapter is being reset */
1611 if (pci_channel_offline(pdev
))
1614 if((netdev
->flags
& IFF_PROMISC
) || (netdev
->flags
& IFF_ALLMULTI
) ||
1615 (netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
)) {
1616 u64 multi
= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1617 u32 bcast_l
= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1618 u32 bcast_h
= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1619 u64 bcast
= ((u64
)bcast_h
<< 32) | bcast_l
;
1621 multi
|= ((u64
)IXGB_READ_REG(&adapter
->hw
, MPRCH
) << 32);
1622 /* fix up multicast stats by removing broadcasts */
1626 adapter
->stats
.mprcl
+= (multi
& 0xFFFFFFFF);
1627 adapter
->stats
.mprch
+= (multi
>> 32);
1628 adapter
->stats
.bprcl
+= bcast_l
;
1629 adapter
->stats
.bprch
+= bcast_h
;
1631 adapter
->stats
.mprcl
+= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1632 adapter
->stats
.mprch
+= IXGB_READ_REG(&adapter
->hw
, MPRCH
);
1633 adapter
->stats
.bprcl
+= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1634 adapter
->stats
.bprch
+= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1636 adapter
->stats
.tprl
+= IXGB_READ_REG(&adapter
->hw
, TPRL
);
1637 adapter
->stats
.tprh
+= IXGB_READ_REG(&adapter
->hw
, TPRH
);
1638 adapter
->stats
.gprcl
+= IXGB_READ_REG(&adapter
->hw
, GPRCL
);
1639 adapter
->stats
.gprch
+= IXGB_READ_REG(&adapter
->hw
, GPRCH
);
1640 adapter
->stats
.uprcl
+= IXGB_READ_REG(&adapter
->hw
, UPRCL
);
1641 adapter
->stats
.uprch
+= IXGB_READ_REG(&adapter
->hw
, UPRCH
);
1642 adapter
->stats
.vprcl
+= IXGB_READ_REG(&adapter
->hw
, VPRCL
);
1643 adapter
->stats
.vprch
+= IXGB_READ_REG(&adapter
->hw
, VPRCH
);
1644 adapter
->stats
.jprcl
+= IXGB_READ_REG(&adapter
->hw
, JPRCL
);
1645 adapter
->stats
.jprch
+= IXGB_READ_REG(&adapter
->hw
, JPRCH
);
1646 adapter
->stats
.gorcl
+= IXGB_READ_REG(&adapter
->hw
, GORCL
);
1647 adapter
->stats
.gorch
+= IXGB_READ_REG(&adapter
->hw
, GORCH
);
1648 adapter
->stats
.torl
+= IXGB_READ_REG(&adapter
->hw
, TORL
);
1649 adapter
->stats
.torh
+= IXGB_READ_REG(&adapter
->hw
, TORH
);
1650 adapter
->stats
.rnbc
+= IXGB_READ_REG(&adapter
->hw
, RNBC
);
1651 adapter
->stats
.ruc
+= IXGB_READ_REG(&adapter
->hw
, RUC
);
1652 adapter
->stats
.roc
+= IXGB_READ_REG(&adapter
->hw
, ROC
);
1653 adapter
->stats
.rlec
+= IXGB_READ_REG(&adapter
->hw
, RLEC
);
1654 adapter
->stats
.crcerrs
+= IXGB_READ_REG(&adapter
->hw
, CRCERRS
);
1655 adapter
->stats
.icbc
+= IXGB_READ_REG(&adapter
->hw
, ICBC
);
1656 adapter
->stats
.ecbc
+= IXGB_READ_REG(&adapter
->hw
, ECBC
);
1657 adapter
->stats
.mpc
+= IXGB_READ_REG(&adapter
->hw
, MPC
);
1658 adapter
->stats
.tptl
+= IXGB_READ_REG(&adapter
->hw
, TPTL
);
1659 adapter
->stats
.tpth
+= IXGB_READ_REG(&adapter
->hw
, TPTH
);
1660 adapter
->stats
.gptcl
+= IXGB_READ_REG(&adapter
->hw
, GPTCL
);
1661 adapter
->stats
.gptch
+= IXGB_READ_REG(&adapter
->hw
, GPTCH
);
1662 adapter
->stats
.bptcl
+= IXGB_READ_REG(&adapter
->hw
, BPTCL
);
1663 adapter
->stats
.bptch
+= IXGB_READ_REG(&adapter
->hw
, BPTCH
);
1664 adapter
->stats
.mptcl
+= IXGB_READ_REG(&adapter
->hw
, MPTCL
);
1665 adapter
->stats
.mptch
+= IXGB_READ_REG(&adapter
->hw
, MPTCH
);
1666 adapter
->stats
.uptcl
+= IXGB_READ_REG(&adapter
->hw
, UPTCL
);
1667 adapter
->stats
.uptch
+= IXGB_READ_REG(&adapter
->hw
, UPTCH
);
1668 adapter
->stats
.vptcl
+= IXGB_READ_REG(&adapter
->hw
, VPTCL
);
1669 adapter
->stats
.vptch
+= IXGB_READ_REG(&adapter
->hw
, VPTCH
);
1670 adapter
->stats
.jptcl
+= IXGB_READ_REG(&adapter
->hw
, JPTCL
);
1671 adapter
->stats
.jptch
+= IXGB_READ_REG(&adapter
->hw
, JPTCH
);
1672 adapter
->stats
.gotcl
+= IXGB_READ_REG(&adapter
->hw
, GOTCL
);
1673 adapter
->stats
.gotch
+= IXGB_READ_REG(&adapter
->hw
, GOTCH
);
1674 adapter
->stats
.totl
+= IXGB_READ_REG(&adapter
->hw
, TOTL
);
1675 adapter
->stats
.toth
+= IXGB_READ_REG(&adapter
->hw
, TOTH
);
1676 adapter
->stats
.dc
+= IXGB_READ_REG(&adapter
->hw
, DC
);
1677 adapter
->stats
.plt64c
+= IXGB_READ_REG(&adapter
->hw
, PLT64C
);
1678 adapter
->stats
.tsctc
+= IXGB_READ_REG(&adapter
->hw
, TSCTC
);
1679 adapter
->stats
.tsctfc
+= IXGB_READ_REG(&adapter
->hw
, TSCTFC
);
1680 adapter
->stats
.ibic
+= IXGB_READ_REG(&adapter
->hw
, IBIC
);
1681 adapter
->stats
.rfc
+= IXGB_READ_REG(&adapter
->hw
, RFC
);
1682 adapter
->stats
.lfc
+= IXGB_READ_REG(&adapter
->hw
, LFC
);
1683 adapter
->stats
.pfrc
+= IXGB_READ_REG(&adapter
->hw
, PFRC
);
1684 adapter
->stats
.pftc
+= IXGB_READ_REG(&adapter
->hw
, PFTC
);
1685 adapter
->stats
.mcfrc
+= IXGB_READ_REG(&adapter
->hw
, MCFRC
);
1686 adapter
->stats
.mcftc
+= IXGB_READ_REG(&adapter
->hw
, MCFTC
);
1687 adapter
->stats
.xonrxc
+= IXGB_READ_REG(&adapter
->hw
, XONRXC
);
1688 adapter
->stats
.xontxc
+= IXGB_READ_REG(&adapter
->hw
, XONTXC
);
1689 adapter
->stats
.xoffrxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFRXC
);
1690 adapter
->stats
.xofftxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFTXC
);
1691 adapter
->stats
.rjc
+= IXGB_READ_REG(&adapter
->hw
, RJC
);
1693 /* Fill out the OS statistics structure */
1695 adapter
->net_stats
.rx_packets
= adapter
->stats
.gprcl
;
1696 adapter
->net_stats
.tx_packets
= adapter
->stats
.gptcl
;
1697 adapter
->net_stats
.rx_bytes
= adapter
->stats
.gorcl
;
1698 adapter
->net_stats
.tx_bytes
= adapter
->stats
.gotcl
;
1699 adapter
->net_stats
.multicast
= adapter
->stats
.mprcl
;
1700 adapter
->net_stats
.collisions
= 0;
1702 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1703 * with a length in the type/len field */
1704 adapter
->net_stats
.rx_errors
=
1705 /* adapter->stats.rnbc + */ adapter
->stats
.crcerrs
+
1706 adapter
->stats
.ruc
+
1707 adapter
->stats
.roc
/*+ adapter->stats.rlec */ +
1708 adapter
->stats
.icbc
+
1709 adapter
->stats
.ecbc
+ adapter
->stats
.mpc
;
1712 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1715 adapter
->net_stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
1716 adapter
->net_stats
.rx_fifo_errors
= adapter
->stats
.mpc
;
1717 adapter
->net_stats
.rx_missed_errors
= adapter
->stats
.mpc
;
1718 adapter
->net_stats
.rx_over_errors
= adapter
->stats
.mpc
;
1720 adapter
->net_stats
.tx_errors
= 0;
1721 adapter
->net_stats
.rx_frame_errors
= 0;
1722 adapter
->net_stats
.tx_aborted_errors
= 0;
1723 adapter
->net_stats
.tx_carrier_errors
= 0;
1724 adapter
->net_stats
.tx_fifo_errors
= 0;
1725 adapter
->net_stats
.tx_heartbeat_errors
= 0;
1726 adapter
->net_stats
.tx_window_errors
= 0;
1729 #define IXGB_MAX_INTR 10
1731 * ixgb_intr - Interrupt Handler
1732 * @irq: interrupt number
1733 * @data: pointer to a network interface device structure
1737 ixgb_intr(int irq
, void *data
)
1739 struct net_device
*netdev
= data
;
1740 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1741 struct ixgb_hw
*hw
= &adapter
->hw
;
1742 uint32_t icr
= IXGB_READ_REG(hw
, ICR
);
1743 #ifndef CONFIG_IXGB_NAPI
1748 return IRQ_NONE
; /* Not our interrupt */
1750 if(unlikely(icr
& (IXGB_INT_RXSEQ
| IXGB_INT_LSC
))) {
1751 mod_timer(&adapter
->watchdog_timer
, jiffies
);
1754 #ifdef CONFIG_IXGB_NAPI
1755 if(netif_rx_schedule_prep(netdev
)) {
1757 /* Disable interrupts and register for poll. The flush
1758 of the posted write is intentionally left out.
1761 atomic_inc(&adapter
->irq_sem
);
1762 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
1763 __netif_rx_schedule(netdev
);
1766 /* yes, that is actually a & and it is meant to make sure that
1767 * every pass through this for loop checks both receive and
1768 * transmit queues for completed descriptors, intended to
1769 * avoid starvation issues and assist tx/rx fairness. */
1770 for(i
= 0; i
< IXGB_MAX_INTR
; i
++)
1771 if(!ixgb_clean_rx_irq(adapter
) &
1772 !ixgb_clean_tx_irq(adapter
))
1778 #ifdef CONFIG_IXGB_NAPI
1780 * ixgb_clean - NAPI Rx polling callback
1781 * @adapter: board private structure
1785 ixgb_clean(struct net_device
*netdev
, int *budget
)
1787 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1788 int work_to_do
= min(*budget
, netdev
->quota
);
1792 tx_cleaned
= ixgb_clean_tx_irq(adapter
);
1793 ixgb_clean_rx_irq(adapter
, &work_done
, work_to_do
);
1795 *budget
-= work_done
;
1796 netdev
->quota
-= work_done
;
1798 /* if no Tx and not enough Rx work done, exit the polling mode */
1799 if((!tx_cleaned
&& (work_done
== 0)) || !netif_running(netdev
)) {
1800 netif_rx_complete(netdev
);
1801 ixgb_irq_enable(adapter
);
1810 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1811 * @adapter: board private structure
1815 ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
)
1817 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1818 struct net_device
*netdev
= adapter
->netdev
;
1819 struct ixgb_tx_desc
*tx_desc
, *eop_desc
;
1820 struct ixgb_buffer
*buffer_info
;
1821 unsigned int i
, eop
;
1822 boolean_t cleaned
= FALSE
;
1824 i
= tx_ring
->next_to_clean
;
1825 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1826 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1828 while(eop_desc
->status
& IXGB_TX_DESC_STATUS_DD
) {
1830 for(cleaned
= FALSE
; !cleaned
; ) {
1831 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1832 buffer_info
= &tx_ring
->buffer_info
[i
];
1835 & (IXGB_TX_DESC_POPTS_TXSM
|
1836 IXGB_TX_DESC_POPTS_IXSM
))
1837 adapter
->hw_csum_tx_good
++;
1839 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
1841 *(uint32_t *)&(tx_desc
->status
) = 0;
1843 cleaned
= (i
== eop
);
1844 if(++i
== tx_ring
->count
) i
= 0;
1847 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1848 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1851 tx_ring
->next_to_clean
= i
;
1853 if (unlikely(netif_queue_stopped(netdev
))) {
1854 spin_lock(&adapter
->tx_lock
);
1855 if (netif_queue_stopped(netdev
) && netif_carrier_ok(netdev
) &&
1856 (IXGB_DESC_UNUSED(tx_ring
) >= DESC_NEEDED
))
1857 netif_wake_queue(netdev
);
1858 spin_unlock(&adapter
->tx_lock
);
1861 if(adapter
->detect_tx_hung
) {
1862 /* detect a transmit hang in hardware, this serializes the
1863 * check with the clearing of time_stamp and movement of i */
1864 adapter
->detect_tx_hung
= FALSE
;
1865 if (tx_ring
->buffer_info
[eop
].dma
&&
1866 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+ HZ
)
1867 && !(IXGB_READ_REG(&adapter
->hw
, STATUS
) &
1868 IXGB_STATUS_TXOFF
)) {
1869 /* detected Tx unit hang */
1870 DPRINTK(DRV
, ERR
, "Detected Tx Unit Hang\n"
1873 " next_to_use <%x>\n"
1874 " next_to_clean <%x>\n"
1875 "buffer_info[next_to_clean]\n"
1876 " time_stamp <%lx>\n"
1877 " next_to_watch <%x>\n"
1879 " next_to_watch.status <%x>\n",
1880 IXGB_READ_REG(&adapter
->hw
, TDH
),
1881 IXGB_READ_REG(&adapter
->hw
, TDT
),
1882 tx_ring
->next_to_use
,
1883 tx_ring
->next_to_clean
,
1884 tx_ring
->buffer_info
[eop
].time_stamp
,
1888 netif_stop_queue(netdev
);
1896 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1897 * @adapter: board private structure
1898 * @rx_desc: receive descriptor
1899 * @sk_buff: socket buffer with received data
1903 ixgb_rx_checksum(struct ixgb_adapter
*adapter
,
1904 struct ixgb_rx_desc
*rx_desc
,
1905 struct sk_buff
*skb
)
1907 /* Ignore Checksum bit is set OR
1908 * TCP Checksum has not been calculated
1910 if((rx_desc
->status
& IXGB_RX_DESC_STATUS_IXSM
) ||
1911 (!(rx_desc
->status
& IXGB_RX_DESC_STATUS_TCPCS
))) {
1912 skb
->ip_summed
= CHECKSUM_NONE
;
1916 /* At this point we know the hardware did the TCP checksum */
1917 /* now look at the TCP checksum error bit */
1918 if(rx_desc
->errors
& IXGB_RX_DESC_ERRORS_TCPE
) {
1919 /* let the stack verify checksum errors */
1920 skb
->ip_summed
= CHECKSUM_NONE
;
1921 adapter
->hw_csum_rx_error
++;
1923 /* TCP checksum is good */
1924 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1925 adapter
->hw_csum_rx_good
++;
1930 * ixgb_clean_rx_irq - Send received data up the network stack,
1931 * @adapter: board private structure
1935 #ifdef CONFIG_IXGB_NAPI
1936 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
, int *work_done
, int work_to_do
)
1938 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
)
1941 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1942 struct net_device
*netdev
= adapter
->netdev
;
1943 struct pci_dev
*pdev
= adapter
->pdev
;
1944 struct ixgb_rx_desc
*rx_desc
, *next_rxd
;
1945 struct ixgb_buffer
*buffer_info
, *next_buffer
, *next2_buffer
;
1948 boolean_t cleaned
= FALSE
;
1950 i
= rx_ring
->next_to_clean
;
1951 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
1952 buffer_info
= &rx_ring
->buffer_info
[i
];
1954 while(rx_desc
->status
& IXGB_RX_DESC_STATUS_DD
) {
1955 struct sk_buff
*skb
, *next_skb
;
1958 #ifdef CONFIG_IXGB_NAPI
1959 if(*work_done
>= work_to_do
)
1964 status
= rx_desc
->status
;
1965 skb
= buffer_info
->skb
;
1966 buffer_info
->skb
= NULL
;
1968 prefetch(skb
->data
);
1970 if(++i
== rx_ring
->count
) i
= 0;
1971 next_rxd
= IXGB_RX_DESC(*rx_ring
, i
);
1974 if((j
= i
+ 1) == rx_ring
->count
) j
= 0;
1975 next2_buffer
= &rx_ring
->buffer_info
[j
];
1976 prefetch(next2_buffer
);
1978 next_buffer
= &rx_ring
->buffer_info
[i
];
1979 next_skb
= next_buffer
->skb
;
1984 pci_unmap_single(pdev
,
1986 buffer_info
->length
,
1987 PCI_DMA_FROMDEVICE
);
1989 length
= le16_to_cpu(rx_desc
->length
);
1991 if(unlikely(!(status
& IXGB_RX_DESC_STATUS_EOP
))) {
1993 /* All receives must fit into a single buffer */
1995 IXGB_DBG("Receive packet consumed multiple buffers "
1996 "length<%x>\n", length
);
1998 dev_kfree_skb_irq(skb
);
2002 if (unlikely(rx_desc
->errors
2003 & (IXGB_RX_DESC_ERRORS_CE
| IXGB_RX_DESC_ERRORS_SE
2004 | IXGB_RX_DESC_ERRORS_P
|
2005 IXGB_RX_DESC_ERRORS_RXE
))) {
2007 dev_kfree_skb_irq(skb
);
2011 /* code added for copybreak, this should improve
2012 * performance for small packets with large amounts
2013 * of reassembly being done in the stack */
2014 #define IXGB_CB_LENGTH 256
2015 if (length
< IXGB_CB_LENGTH
) {
2016 struct sk_buff
*new_skb
=
2017 netdev_alloc_skb(netdev
, length
+ NET_IP_ALIGN
);
2019 skb_reserve(new_skb
, NET_IP_ALIGN
);
2020 skb_copy_to_linear_data_offset(new_skb
,
2026 /* save the skb in buffer_info as good */
2027 buffer_info
->skb
= skb
;
2031 /* end copybreak code */
2034 skb_put(skb
, length
);
2036 /* Receive Checksum Offload */
2037 ixgb_rx_checksum(adapter
, rx_desc
, skb
);
2039 skb
->protocol
= eth_type_trans(skb
, netdev
);
2040 #ifdef CONFIG_IXGB_NAPI
2041 if(adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
2042 vlan_hwaccel_receive_skb(skb
, adapter
->vlgrp
,
2043 le16_to_cpu(rx_desc
->special
) &
2044 IXGB_RX_DESC_SPECIAL_VLAN_MASK
);
2046 netif_receive_skb(skb
);
2048 #else /* CONFIG_IXGB_NAPI */
2049 if(adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
2050 vlan_hwaccel_rx(skb
, adapter
->vlgrp
,
2051 le16_to_cpu(rx_desc
->special
) &
2052 IXGB_RX_DESC_SPECIAL_VLAN_MASK
);
2056 #endif /* CONFIG_IXGB_NAPI */
2057 netdev
->last_rx
= jiffies
;
2060 /* clean up descriptor, might be written over by hw */
2061 rx_desc
->status
= 0;
2063 /* use prefetched values */
2065 buffer_info
= next_buffer
;
2068 rx_ring
->next_to_clean
= i
;
2070 ixgb_alloc_rx_buffers(adapter
);
2076 * ixgb_alloc_rx_buffers - Replace used receive buffers
2077 * @adapter: address of board private structure
2081 ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
)
2083 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
2084 struct net_device
*netdev
= adapter
->netdev
;
2085 struct pci_dev
*pdev
= adapter
->pdev
;
2086 struct ixgb_rx_desc
*rx_desc
;
2087 struct ixgb_buffer
*buffer_info
;
2088 struct sk_buff
*skb
;
2090 int num_group_tail_writes
;
2093 i
= rx_ring
->next_to_use
;
2094 buffer_info
= &rx_ring
->buffer_info
[i
];
2095 cleancount
= IXGB_DESC_UNUSED(rx_ring
);
2097 num_group_tail_writes
= IXGB_RX_BUFFER_WRITE
;
2099 /* leave three descriptors unused */
2100 while(--cleancount
> 2) {
2101 /* recycle! its good for you */
2102 skb
= buffer_info
->skb
;
2108 skb
= netdev_alloc_skb(netdev
, adapter
->rx_buffer_len
2110 if (unlikely(!skb
)) {
2111 /* Better luck next round */
2112 adapter
->alloc_rx_buff_failed
++;
2116 /* Make buffer alignment 2 beyond a 16 byte boundary
2117 * this will result in a 16 byte aligned IP header after
2118 * the 14 byte MAC header is removed
2120 skb_reserve(skb
, NET_IP_ALIGN
);
2122 buffer_info
->skb
= skb
;
2123 buffer_info
->length
= adapter
->rx_buffer_len
;
2125 buffer_info
->dma
= pci_map_single(pdev
,
2127 adapter
->rx_buffer_len
,
2128 PCI_DMA_FROMDEVICE
);
2130 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
2131 rx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
2132 /* guarantee DD bit not set now before h/w gets descriptor
2133 * this is the rest of the workaround for h/w double
2135 rx_desc
->status
= 0;
2138 if(++i
== rx_ring
->count
) i
= 0;
2139 buffer_info
= &rx_ring
->buffer_info
[i
];
2142 if (likely(rx_ring
->next_to_use
!= i
)) {
2143 rx_ring
->next_to_use
= i
;
2144 if (unlikely(i
-- == 0))
2145 i
= (rx_ring
->count
- 1);
2147 /* Force memory writes to complete before letting h/w
2148 * know there are new descriptors to fetch. (Only
2149 * applicable for weak-ordered memory model archs, such
2152 IXGB_WRITE_REG(&adapter
->hw
, RDT
, i
);
2157 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2159 * @param netdev network interface device structure
2160 * @param grp indicates to enable or disable tagging/stripping
2163 ixgb_vlan_rx_register(struct net_device
*netdev
, struct vlan_group
*grp
)
2165 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2166 uint32_t ctrl
, rctl
;
2168 ixgb_irq_disable(adapter
);
2169 adapter
->vlgrp
= grp
;
2172 /* enable VLAN tag insert/strip */
2173 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2174 ctrl
|= IXGB_CTRL0_VME
;
2175 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2177 /* enable VLAN receive filtering */
2179 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2180 rctl
|= IXGB_RCTL_VFE
;
2181 rctl
&= ~IXGB_RCTL_CFIEN
;
2182 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2184 /* disable VLAN tag insert/strip */
2186 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2187 ctrl
&= ~IXGB_CTRL0_VME
;
2188 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2190 /* disable VLAN filtering */
2192 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2193 rctl
&= ~IXGB_RCTL_VFE
;
2194 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2197 ixgb_irq_enable(adapter
);
2201 ixgb_vlan_rx_add_vid(struct net_device
*netdev
, uint16_t vid
)
2203 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2204 uint32_t vfta
, index
;
2206 /* add VID to filter table */
2208 index
= (vid
>> 5) & 0x7F;
2209 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2210 vfta
|= (1 << (vid
& 0x1F));
2211 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2215 ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, uint16_t vid
)
2217 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2218 uint32_t vfta
, index
;
2220 ixgb_irq_disable(adapter
);
2222 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
2224 ixgb_irq_enable(adapter
);
2226 /* remove VID from filter table*/
2228 index
= (vid
>> 5) & 0x7F;
2229 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2230 vfta
&= ~(1 << (vid
& 0x1F));
2231 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2235 ixgb_restore_vlan(struct ixgb_adapter
*adapter
)
2237 ixgb_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
2239 if(adapter
->vlgrp
) {
2241 for(vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
2242 if(!vlan_group_get_device(adapter
->vlgrp
, vid
))
2244 ixgb_vlan_rx_add_vid(adapter
->netdev
, vid
);
2249 #ifdef CONFIG_NET_POLL_CONTROLLER
2251 * Polling 'interrupt' - used by things like netconsole to send skbs
2252 * without having to re-enable interrupts. It's not called while
2253 * the interrupt routine is executing.
2256 static void ixgb_netpoll(struct net_device
*dev
)
2258 struct ixgb_adapter
*adapter
= netdev_priv(dev
);
2260 disable_irq(adapter
->pdev
->irq
);
2261 ixgb_intr(adapter
->pdev
->irq
, dev
);
2262 enable_irq(adapter
->pdev
->irq
);
2267 * ixgb_io_error_detected() - called when PCI error is detected
2268 * @pdev pointer to pci device with error
2269 * @state pci channel state after error
2271 * This callback is called by the PCI subsystem whenever
2272 * a PCI bus error is detected.
2274 static pci_ers_result_t
ixgb_io_error_detected (struct pci_dev
*pdev
,
2275 enum pci_channel_state state
)
2277 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2278 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2280 if(netif_running(netdev
))
2281 ixgb_down(adapter
, TRUE
);
2283 pci_disable_device(pdev
);
2285 /* Request a slot reset. */
2286 return PCI_ERS_RESULT_NEED_RESET
;
2290 * ixgb_io_slot_reset - called after the pci bus has been reset.
2291 * @pdev pointer to pci device with error
2293 * This callback is called after the PCI buss has been reset.
2294 * Basically, this tries to restart the card from scratch.
2295 * This is a shortened version of the device probe/discovery code,
2296 * it resembles the first-half of the ixgb_probe() routine.
2298 static pci_ers_result_t
ixgb_io_slot_reset (struct pci_dev
*pdev
)
2300 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2301 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2303 if(pci_enable_device(pdev
)) {
2304 DPRINTK(PROBE
, ERR
, "Cannot re-enable PCI device after reset.\n");
2305 return PCI_ERS_RESULT_DISCONNECT
;
2308 /* Perform card reset only on one instance of the card */
2309 if (0 != PCI_FUNC (pdev
->devfn
))
2310 return PCI_ERS_RESULT_RECOVERED
;
2312 pci_set_master(pdev
);
2314 netif_carrier_off(netdev
);
2315 netif_stop_queue(netdev
);
2316 ixgb_reset(adapter
);
2318 /* Make sure the EEPROM is good */
2319 if(!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
2320 DPRINTK(PROBE
, ERR
, "After reset, the EEPROM checksum is not valid.\n");
2321 return PCI_ERS_RESULT_DISCONNECT
;
2323 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
2324 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
2326 if(!is_valid_ether_addr(netdev
->perm_addr
)) {
2327 DPRINTK(PROBE
, ERR
, "After reset, invalid MAC address.\n");
2328 return PCI_ERS_RESULT_DISCONNECT
;
2331 return PCI_ERS_RESULT_RECOVERED
;
2335 * ixgb_io_resume - called when its OK to resume normal operations
2336 * @pdev pointer to pci device with error
2338 * The error recovery driver tells us that its OK to resume
2339 * normal operation. Implementation resembles the second-half
2340 * of the ixgb_probe() routine.
2342 static void ixgb_io_resume (struct pci_dev
*pdev
)
2344 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2345 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2347 pci_set_master(pdev
);
2349 if(netif_running(netdev
)) {
2350 if(ixgb_up(adapter
)) {
2351 printk ("ixgb: can't bring device back up after reset\n");
2356 netif_device_attach(netdev
);
2357 mod_timer(&adapter
->watchdog_timer
, jiffies
);