1 /*******************************************************************************
4 Copyright(c) 1999 - 2006 Intel Corporation. All rights reserved.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2 of the License, or (at your option)
11 This program is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 You should have received a copy of the GNU General Public License along with
17 this program; if not, write to the Free Software Foundation, Inc., 59
18 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 The full GNU General Public License is included in this distribution in the
24 Linux NICS <linux.nics@intel.com>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
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 "1.0.112-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
, struct pt_regs
*regs
);
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 net_device
*dev
);
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 strcpy(netdev
->name
, pci_name(pdev
));
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
;
460 netdev
->features
|= NETIF_F_TSO
;
463 netdev
->features
|= NETIF_F_LLTX
;
467 netdev
->features
|= NETIF_F_HIGHDMA
;
469 /* make sure the EEPROM is good */
471 if(!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
472 DPRINTK(PROBE
, ERR
, "The EEPROM Checksum Is Not Valid\n");
477 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
478 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
480 if(!is_valid_ether_addr(netdev
->perm_addr
)) {
481 DPRINTK(PROBE
, ERR
, "Invalid MAC Address\n");
486 adapter
->part_num
= ixgb_get_ee_pba_number(&adapter
->hw
);
488 init_timer(&adapter
->watchdog_timer
);
489 adapter
->watchdog_timer
.function
= &ixgb_watchdog
;
490 adapter
->watchdog_timer
.data
= (unsigned long)adapter
;
492 INIT_WORK(&adapter
->tx_timeout_task
,
493 (void (*)(void *))ixgb_tx_timeout_task
, netdev
);
495 strcpy(netdev
->name
, "eth%d");
496 if((err
= register_netdev(netdev
)))
499 /* we're going to reset, so assume we have no link for now */
501 netif_carrier_off(netdev
);
502 netif_stop_queue(netdev
);
504 DPRINTK(PROBE
, INFO
, "Intel(R) PRO/10GbE Network Connection\n");
505 ixgb_check_options(adapter
);
506 /* reset the hardware with the new settings */
516 iounmap(adapter
->hw
.hw_addr
);
520 pci_release_regions(pdev
);
523 pci_disable_device(pdev
);
528 * ixgb_remove - Device Removal Routine
529 * @pdev: PCI device information struct
531 * ixgb_remove is called by the PCI subsystem to alert the driver
532 * that it should release a PCI device. The could be caused by a
533 * Hot-Plug event, or because the driver is going to be removed from
537 static void __devexit
538 ixgb_remove(struct pci_dev
*pdev
)
540 struct net_device
*netdev
= pci_get_drvdata(pdev
);
541 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
543 unregister_netdev(netdev
);
545 iounmap(adapter
->hw
.hw_addr
);
546 pci_release_regions(pdev
);
552 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
553 * @adapter: board private structure to initialize
555 * ixgb_sw_init initializes the Adapter private data structure.
556 * Fields are initialized based on PCI device information and
557 * OS network device settings (MTU size).
561 ixgb_sw_init(struct ixgb_adapter
*adapter
)
563 struct ixgb_hw
*hw
= &adapter
->hw
;
564 struct net_device
*netdev
= adapter
->netdev
;
565 struct pci_dev
*pdev
= adapter
->pdev
;
567 /* PCI config space info */
569 hw
->vendor_id
= pdev
->vendor
;
570 hw
->device_id
= pdev
->device
;
571 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
572 hw
->subsystem_id
= pdev
->subsystem_device
;
574 hw
->max_frame_size
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
575 adapter
->rx_buffer_len
= hw
->max_frame_size
;
577 if((hw
->device_id
== IXGB_DEVICE_ID_82597EX
)
578 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_CX4
)
579 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_LR
)
580 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_SR
))
581 hw
->mac_type
= ixgb_82597
;
583 /* should never have loaded on this device */
584 DPRINTK(PROBE
, ERR
, "unsupported device id\n");
587 /* enable flow control to be programmed */
590 atomic_set(&adapter
->irq_sem
, 1);
591 spin_lock_init(&adapter
->tx_lock
);
597 * ixgb_open - Called when a network interface is made active
598 * @netdev: network interface device structure
600 * Returns 0 on success, negative value on failure
602 * The open entry point is called when a network interface is made
603 * active by the system (IFF_UP). At this point all resources needed
604 * for transmit and receive operations are allocated, the interrupt
605 * handler is registered with the OS, the watchdog timer is started,
606 * and the stack is notified that the interface is ready.
610 ixgb_open(struct net_device
*netdev
)
612 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
615 /* allocate transmit descriptors */
617 if((err
= ixgb_setup_tx_resources(adapter
)))
620 /* allocate receive descriptors */
622 if((err
= ixgb_setup_rx_resources(adapter
)))
625 if((err
= ixgb_up(adapter
)))
631 ixgb_free_rx_resources(adapter
);
633 ixgb_free_tx_resources(adapter
);
641 * ixgb_close - Disables a network interface
642 * @netdev: network interface device structure
644 * Returns 0, this is not allowed to fail
646 * The close entry point is called when an interface is de-activated
647 * by the OS. The hardware is still under the drivers control, but
648 * needs to be disabled. A global MAC reset is issued to stop the
649 * hardware, and all transmit and receive resources are freed.
653 ixgb_close(struct net_device
*netdev
)
655 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
657 ixgb_down(adapter
, TRUE
);
659 ixgb_free_tx_resources(adapter
);
660 ixgb_free_rx_resources(adapter
);
666 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
667 * @adapter: board private structure
669 * Return 0 on success, negative on failure
673 ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
)
675 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
676 struct pci_dev
*pdev
= adapter
->pdev
;
679 size
= sizeof(struct ixgb_buffer
) * txdr
->count
;
680 txdr
->buffer_info
= vmalloc(size
);
681 if(!txdr
->buffer_info
) {
683 "Unable to allocate transmit descriptor ring memory\n");
686 memset(txdr
->buffer_info
, 0, size
);
688 /* round up to nearest 4K */
690 txdr
->size
= txdr
->count
* sizeof(struct ixgb_tx_desc
);
691 IXGB_ROUNDUP(txdr
->size
, 4096);
693 txdr
->desc
= pci_alloc_consistent(pdev
, txdr
->size
, &txdr
->dma
);
695 vfree(txdr
->buffer_info
);
697 "Unable to allocate transmit descriptor memory\n");
700 memset(txdr
->desc
, 0, txdr
->size
);
702 txdr
->next_to_use
= 0;
703 txdr
->next_to_clean
= 0;
709 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
710 * @adapter: board private structure
712 * Configure the Tx unit of the MAC after a reset.
716 ixgb_configure_tx(struct ixgb_adapter
*adapter
)
718 uint64_t tdba
= adapter
->tx_ring
.dma
;
719 uint32_t tdlen
= adapter
->tx_ring
.count
* sizeof(struct ixgb_tx_desc
);
721 struct ixgb_hw
*hw
= &adapter
->hw
;
723 /* Setup the Base and Length of the Tx Descriptor Ring
724 * tx_ring.dma can be either a 32 or 64 bit value
727 IXGB_WRITE_REG(hw
, TDBAL
, (tdba
& 0x00000000ffffffffULL
));
728 IXGB_WRITE_REG(hw
, TDBAH
, (tdba
>> 32));
730 IXGB_WRITE_REG(hw
, TDLEN
, tdlen
);
732 /* Setup the HW Tx Head and Tail descriptor pointers */
734 IXGB_WRITE_REG(hw
, TDH
, 0);
735 IXGB_WRITE_REG(hw
, TDT
, 0);
737 /* don't set up txdctl, it induces performance problems if configured
739 /* Set the Tx Interrupt Delay register */
741 IXGB_WRITE_REG(hw
, TIDV
, adapter
->tx_int_delay
);
743 /* Program the Transmit Control Register */
745 tctl
= IXGB_TCTL_TCE
| IXGB_TCTL_TXEN
| IXGB_TCTL_TPDE
;
746 IXGB_WRITE_REG(hw
, TCTL
, tctl
);
748 /* Setup Transmit Descriptor Settings for this adapter */
749 adapter
->tx_cmd_type
=
751 | (adapter
->tx_int_delay_enable
? IXGB_TX_DESC_CMD_IDE
: 0);
755 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
756 * @adapter: board private structure
758 * Returns 0 on success, negative on failure
762 ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
)
764 struct ixgb_desc_ring
*rxdr
= &adapter
->rx_ring
;
765 struct pci_dev
*pdev
= adapter
->pdev
;
768 size
= sizeof(struct ixgb_buffer
) * rxdr
->count
;
769 rxdr
->buffer_info
= vmalloc(size
);
770 if(!rxdr
->buffer_info
) {
772 "Unable to allocate receive descriptor ring\n");
775 memset(rxdr
->buffer_info
, 0, size
);
777 /* Round up to nearest 4K */
779 rxdr
->size
= rxdr
->count
* sizeof(struct ixgb_rx_desc
);
780 IXGB_ROUNDUP(rxdr
->size
, 4096);
782 rxdr
->desc
= pci_alloc_consistent(pdev
, rxdr
->size
, &rxdr
->dma
);
785 vfree(rxdr
->buffer_info
);
787 "Unable to allocate receive descriptors\n");
790 memset(rxdr
->desc
, 0, rxdr
->size
);
792 rxdr
->next_to_clean
= 0;
793 rxdr
->next_to_use
= 0;
799 * ixgb_setup_rctl - configure the receive control register
800 * @adapter: Board private structure
804 ixgb_setup_rctl(struct ixgb_adapter
*adapter
)
808 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
810 rctl
&= ~(3 << IXGB_RCTL_MO_SHIFT
);
813 IXGB_RCTL_BAM
| IXGB_RCTL_RDMTS_1_2
|
814 IXGB_RCTL_RXEN
| IXGB_RCTL_CFF
|
815 (adapter
->hw
.mc_filter_type
<< IXGB_RCTL_MO_SHIFT
);
817 rctl
|= IXGB_RCTL_SECRC
;
819 if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_2048
)
820 rctl
|= IXGB_RCTL_BSIZE_2048
;
821 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_4096
)
822 rctl
|= IXGB_RCTL_BSIZE_4096
;
823 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_8192
)
824 rctl
|= IXGB_RCTL_BSIZE_8192
;
825 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_16384
)
826 rctl
|= IXGB_RCTL_BSIZE_16384
;
828 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
832 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
833 * @adapter: board private structure
835 * Configure the Rx unit of the MAC after a reset.
839 ixgb_configure_rx(struct ixgb_adapter
*adapter
)
841 uint64_t rdba
= adapter
->rx_ring
.dma
;
842 uint32_t rdlen
= adapter
->rx_ring
.count
* sizeof(struct ixgb_rx_desc
);
843 struct ixgb_hw
*hw
= &adapter
->hw
;
848 /* make sure receives are disabled while setting up the descriptors */
850 rctl
= IXGB_READ_REG(hw
, RCTL
);
851 IXGB_WRITE_REG(hw
, RCTL
, rctl
& ~IXGB_RCTL_RXEN
);
853 /* set the Receive Delay Timer Register */
855 IXGB_WRITE_REG(hw
, RDTR
, adapter
->rx_int_delay
);
857 /* Setup the Base and Length of the Rx Descriptor Ring */
859 IXGB_WRITE_REG(hw
, RDBAL
, (rdba
& 0x00000000ffffffffULL
));
860 IXGB_WRITE_REG(hw
, RDBAH
, (rdba
>> 32));
862 IXGB_WRITE_REG(hw
, RDLEN
, rdlen
);
864 /* Setup the HW Rx Head and Tail Descriptor Pointers */
865 IXGB_WRITE_REG(hw
, RDH
, 0);
866 IXGB_WRITE_REG(hw
, RDT
, 0);
868 /* set up pre-fetching of receive buffers so we get some before we
869 * run out (default hardware behavior is to run out before fetching
870 * more). This sets up to fetch if HTHRESH rx descriptors are avail
871 * and the descriptors in hw cache are below PTHRESH. This avoids
872 * the hardware behavior of fetching <=512 descriptors in a single
873 * burst that pre-empts all other activity, usually causing fifo
875 /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
876 rxdctl
= RXDCTL_WTHRESH_DEFAULT
<< IXGB_RXDCTL_WTHRESH_SHIFT
|
877 RXDCTL_HTHRESH_DEFAULT
<< IXGB_RXDCTL_HTHRESH_SHIFT
|
878 RXDCTL_PTHRESH_DEFAULT
<< IXGB_RXDCTL_PTHRESH_SHIFT
;
879 IXGB_WRITE_REG(hw
, RXDCTL
, rxdctl
);
881 /* Enable Receive Checksum Offload for TCP and UDP */
882 if(adapter
->rx_csum
== TRUE
) {
883 rxcsum
= IXGB_READ_REG(hw
, RXCSUM
);
884 rxcsum
|= IXGB_RXCSUM_TUOFL
;
885 IXGB_WRITE_REG(hw
, RXCSUM
, rxcsum
);
888 /* Enable Receives */
890 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
894 * ixgb_free_tx_resources - Free Tx Resources
895 * @adapter: board private structure
897 * Free all transmit software resources
901 ixgb_free_tx_resources(struct ixgb_adapter
*adapter
)
903 struct pci_dev
*pdev
= adapter
->pdev
;
905 ixgb_clean_tx_ring(adapter
);
907 vfree(adapter
->tx_ring
.buffer_info
);
908 adapter
->tx_ring
.buffer_info
= NULL
;
910 pci_free_consistent(pdev
, adapter
->tx_ring
.size
,
911 adapter
->tx_ring
.desc
, adapter
->tx_ring
.dma
);
913 adapter
->tx_ring
.desc
= NULL
;
917 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter
*adapter
,
918 struct ixgb_buffer
*buffer_info
)
920 struct pci_dev
*pdev
= adapter
->pdev
;
922 if (buffer_info
->dma
)
923 pci_unmap_page(pdev
, buffer_info
->dma
, buffer_info
->length
,
926 if (buffer_info
->skb
)
927 dev_kfree_skb_any(buffer_info
->skb
);
929 buffer_info
->skb
= NULL
;
930 buffer_info
->dma
= 0;
931 buffer_info
->time_stamp
= 0;
932 /* these fields must always be initialized in tx
933 * buffer_info->length = 0;
934 * buffer_info->next_to_watch = 0; */
938 * ixgb_clean_tx_ring - Free Tx Buffers
939 * @adapter: board private structure
943 ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
)
945 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
946 struct ixgb_buffer
*buffer_info
;
950 /* Free all the Tx ring sk_buffs */
952 for(i
= 0; i
< tx_ring
->count
; i
++) {
953 buffer_info
= &tx_ring
->buffer_info
[i
];
954 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
957 size
= sizeof(struct ixgb_buffer
) * tx_ring
->count
;
958 memset(tx_ring
->buffer_info
, 0, size
);
960 /* Zero out the descriptor ring */
962 memset(tx_ring
->desc
, 0, tx_ring
->size
);
964 tx_ring
->next_to_use
= 0;
965 tx_ring
->next_to_clean
= 0;
967 IXGB_WRITE_REG(&adapter
->hw
, TDH
, 0);
968 IXGB_WRITE_REG(&adapter
->hw
, TDT
, 0);
972 * ixgb_free_rx_resources - Free Rx Resources
973 * @adapter: board private structure
975 * Free all receive software resources
979 ixgb_free_rx_resources(struct ixgb_adapter
*adapter
)
981 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
982 struct pci_dev
*pdev
= adapter
->pdev
;
984 ixgb_clean_rx_ring(adapter
);
986 vfree(rx_ring
->buffer_info
);
987 rx_ring
->buffer_info
= NULL
;
989 pci_free_consistent(pdev
, rx_ring
->size
, rx_ring
->desc
, rx_ring
->dma
);
991 rx_ring
->desc
= NULL
;
995 * ixgb_clean_rx_ring - Free Rx Buffers
996 * @adapter: board private structure
1000 ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
)
1002 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1003 struct ixgb_buffer
*buffer_info
;
1004 struct pci_dev
*pdev
= adapter
->pdev
;
1008 /* Free all the Rx ring sk_buffs */
1010 for(i
= 0; i
< rx_ring
->count
; i
++) {
1011 buffer_info
= &rx_ring
->buffer_info
[i
];
1012 if(buffer_info
->skb
) {
1014 pci_unmap_single(pdev
,
1016 buffer_info
->length
,
1017 PCI_DMA_FROMDEVICE
);
1019 dev_kfree_skb(buffer_info
->skb
);
1021 buffer_info
->skb
= NULL
;
1025 size
= sizeof(struct ixgb_buffer
) * rx_ring
->count
;
1026 memset(rx_ring
->buffer_info
, 0, size
);
1028 /* Zero out the descriptor ring */
1030 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1032 rx_ring
->next_to_clean
= 0;
1033 rx_ring
->next_to_use
= 0;
1035 IXGB_WRITE_REG(&adapter
->hw
, RDH
, 0);
1036 IXGB_WRITE_REG(&adapter
->hw
, RDT
, 0);
1040 * ixgb_set_mac - Change the Ethernet Address of the NIC
1041 * @netdev: network interface device structure
1042 * @p: pointer to an address structure
1044 * Returns 0 on success, negative on failure
1048 ixgb_set_mac(struct net_device
*netdev
, void *p
)
1050 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1051 struct sockaddr
*addr
= p
;
1053 if(!is_valid_ether_addr(addr
->sa_data
))
1054 return -EADDRNOTAVAIL
;
1056 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1058 ixgb_rar_set(&adapter
->hw
, addr
->sa_data
, 0);
1064 * ixgb_set_multi - Multicast and Promiscuous mode set
1065 * @netdev: network interface device structure
1067 * The set_multi entry point is called whenever the multicast address
1068 * list or the network interface flags are updated. This routine is
1069 * responsible for configuring the hardware for proper multicast,
1070 * promiscuous mode, and all-multi behavior.
1074 ixgb_set_multi(struct net_device
*netdev
)
1076 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1077 struct ixgb_hw
*hw
= &adapter
->hw
;
1078 struct dev_mc_list
*mc_ptr
;
1082 /* Check for Promiscuous and All Multicast modes */
1084 rctl
= IXGB_READ_REG(hw
, RCTL
);
1086 if(netdev
->flags
& IFF_PROMISC
) {
1087 rctl
|= (IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1088 } else if(netdev
->flags
& IFF_ALLMULTI
) {
1089 rctl
|= IXGB_RCTL_MPE
;
1090 rctl
&= ~IXGB_RCTL_UPE
;
1092 rctl
&= ~(IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1095 if(netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
) {
1096 rctl
|= IXGB_RCTL_MPE
;
1097 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1099 uint8_t mta
[netdev
->mc_count
* IXGB_ETH_LENGTH_OF_ADDRESS
];
1101 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1103 for(i
= 0, mc_ptr
= netdev
->mc_list
; mc_ptr
;
1104 i
++, mc_ptr
= mc_ptr
->next
)
1105 memcpy(&mta
[i
* IXGB_ETH_LENGTH_OF_ADDRESS
],
1106 mc_ptr
->dmi_addr
, IXGB_ETH_LENGTH_OF_ADDRESS
);
1108 ixgb_mc_addr_list_update(hw
, mta
, netdev
->mc_count
, 0);
1113 * ixgb_watchdog - Timer Call-back
1114 * @data: pointer to netdev cast into an unsigned long
1118 ixgb_watchdog(unsigned long data
)
1120 struct ixgb_adapter
*adapter
= (struct ixgb_adapter
*)data
;
1121 struct net_device
*netdev
= adapter
->netdev
;
1122 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
1124 ixgb_check_for_link(&adapter
->hw
);
1126 if (ixgb_check_for_bad_link(&adapter
->hw
)) {
1127 /* force the reset path */
1128 netif_stop_queue(netdev
);
1131 if(adapter
->hw
.link_up
) {
1132 if(!netif_carrier_ok(netdev
)) {
1134 "NIC Link is Up 10000 Mbps Full Duplex\n");
1135 adapter
->link_speed
= 10000;
1136 adapter
->link_duplex
= FULL_DUPLEX
;
1137 netif_carrier_on(netdev
);
1138 netif_wake_queue(netdev
);
1141 if(netif_carrier_ok(netdev
)) {
1142 adapter
->link_speed
= 0;
1143 adapter
->link_duplex
= 0;
1144 DPRINTK(LINK
, INFO
, "NIC Link is Down\n");
1145 netif_carrier_off(netdev
);
1146 netif_stop_queue(netdev
);
1151 ixgb_update_stats(adapter
);
1153 if(!netif_carrier_ok(netdev
)) {
1154 if(IXGB_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
1155 /* We've lost link, so the controller stops DMA,
1156 * but we've got queued Tx work that's never going
1157 * to get done, so reset controller to flush Tx.
1158 * (Do the reset outside of interrupt context). */
1159 schedule_work(&adapter
->tx_timeout_task
);
1163 /* Force detection of hung controller every watchdog period */
1164 adapter
->detect_tx_hung
= TRUE
;
1166 /* generate an interrupt to force clean up of any stragglers */
1167 IXGB_WRITE_REG(&adapter
->hw
, ICS
, IXGB_INT_TXDW
);
1169 /* Reset the timer */
1170 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 2 * HZ
);
1173 #define IXGB_TX_FLAGS_CSUM 0x00000001
1174 #define IXGB_TX_FLAGS_VLAN 0x00000002
1175 #define IXGB_TX_FLAGS_TSO 0x00000004
1178 ixgb_tso(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1181 struct ixgb_context_desc
*context_desc
;
1183 uint8_t ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
1184 uint16_t ipcse
, tucse
, mss
;
1187 if (likely(skb_is_gso(skb
))) {
1188 struct ixgb_buffer
*buffer_info
;
1189 if (skb_header_cloned(skb
)) {
1190 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
1195 hdr_len
= ((skb
->h
.raw
- skb
->data
) + (skb
->h
.th
->doff
<< 2));
1196 mss
= skb_shinfo(skb
)->gso_size
;
1197 skb
->nh
.iph
->tot_len
= 0;
1198 skb
->nh
.iph
->check
= 0;
1199 skb
->h
.th
->check
= ~csum_tcpudp_magic(skb
->nh
.iph
->saddr
,
1202 ipcss
= skb
->nh
.raw
- skb
->data
;
1203 ipcso
= (void *)&(skb
->nh
.iph
->check
) - (void *)skb
->data
;
1204 ipcse
= skb
->h
.raw
- skb
->data
- 1;
1205 tucss
= skb
->h
.raw
- skb
->data
;
1206 tucso
= (void *)&(skb
->h
.th
->check
) - (void *)skb
->data
;
1209 i
= adapter
->tx_ring
.next_to_use
;
1210 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1211 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1212 WARN_ON(buffer_info
->dma
!= 0);
1214 context_desc
->ipcss
= ipcss
;
1215 context_desc
->ipcso
= ipcso
;
1216 context_desc
->ipcse
= cpu_to_le16(ipcse
);
1217 context_desc
->tucss
= tucss
;
1218 context_desc
->tucso
= tucso
;
1219 context_desc
->tucse
= cpu_to_le16(tucse
);
1220 context_desc
->mss
= cpu_to_le16(mss
);
1221 context_desc
->hdr_len
= hdr_len
;
1222 context_desc
->status
= 0;
1223 context_desc
->cmd_type_len
= cpu_to_le32(
1224 IXGB_CONTEXT_DESC_TYPE
1225 | IXGB_CONTEXT_DESC_CMD_TSE
1226 | IXGB_CONTEXT_DESC_CMD_IP
1227 | IXGB_CONTEXT_DESC_CMD_TCP
1228 | IXGB_CONTEXT_DESC_CMD_IDE
1229 | (skb
->len
- (hdr_len
)));
1232 if(++i
== adapter
->tx_ring
.count
) i
= 0;
1233 adapter
->tx_ring
.next_to_use
= i
;
1243 ixgb_tx_csum(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1245 struct ixgb_context_desc
*context_desc
;
1249 if(likely(skb
->ip_summed
== CHECKSUM_PARTIAL
)) {
1250 struct ixgb_buffer
*buffer_info
;
1251 css
= skb
->h
.raw
- skb
->data
;
1252 cso
= (skb
->h
.raw
+ skb
->csum
) - skb
->data
;
1254 i
= adapter
->tx_ring
.next_to_use
;
1255 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1256 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1257 WARN_ON(buffer_info
->dma
!= 0);
1259 context_desc
->tucss
= css
;
1260 context_desc
->tucso
= cso
;
1261 context_desc
->tucse
= 0;
1262 /* zero out any previously existing data in one instruction */
1263 *(uint32_t *)&(context_desc
->ipcss
) = 0;
1264 context_desc
->status
= 0;
1265 context_desc
->hdr_len
= 0;
1266 context_desc
->mss
= 0;
1267 context_desc
->cmd_type_len
=
1268 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1269 | IXGB_TX_DESC_CMD_IDE
);
1271 if(++i
== adapter
->tx_ring
.count
) i
= 0;
1272 adapter
->tx_ring
.next_to_use
= i
;
1280 #define IXGB_MAX_TXD_PWR 14
1281 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1284 ixgb_tx_map(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
,
1287 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1288 struct ixgb_buffer
*buffer_info
;
1290 unsigned int offset
= 0, size
, count
= 0, i
;
1292 unsigned int nr_frags
= skb_shinfo(skb
)->nr_frags
;
1295 len
-= skb
->data_len
;
1297 i
= tx_ring
->next_to_use
;
1300 buffer_info
= &tx_ring
->buffer_info
[i
];
1301 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1302 buffer_info
->length
= size
;
1303 WARN_ON(buffer_info
->dma
!= 0);
1305 pci_map_single(adapter
->pdev
,
1309 buffer_info
->time_stamp
= jiffies
;
1310 buffer_info
->next_to_watch
= 0;
1315 if(++i
== tx_ring
->count
) i
= 0;
1318 for(f
= 0; f
< nr_frags
; f
++) {
1319 struct skb_frag_struct
*frag
;
1321 frag
= &skb_shinfo(skb
)->frags
[f
];
1326 buffer_info
= &tx_ring
->buffer_info
[i
];
1327 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1328 buffer_info
->length
= size
;
1330 pci_map_page(adapter
->pdev
,
1332 frag
->page_offset
+ offset
,
1335 buffer_info
->time_stamp
= jiffies
;
1336 buffer_info
->next_to_watch
= 0;
1341 if(++i
== tx_ring
->count
) i
= 0;
1344 i
= (i
== 0) ? tx_ring
->count
- 1 : i
- 1;
1345 tx_ring
->buffer_info
[i
].skb
= skb
;
1346 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
1352 ixgb_tx_queue(struct ixgb_adapter
*adapter
, int count
, int vlan_id
,int tx_flags
)
1354 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1355 struct ixgb_tx_desc
*tx_desc
= NULL
;
1356 struct ixgb_buffer
*buffer_info
;
1357 uint32_t cmd_type_len
= adapter
->tx_cmd_type
;
1362 if(tx_flags
& IXGB_TX_FLAGS_TSO
) {
1363 cmd_type_len
|= IXGB_TX_DESC_CMD_TSE
;
1364 popts
|= (IXGB_TX_DESC_POPTS_IXSM
| IXGB_TX_DESC_POPTS_TXSM
);
1367 if(tx_flags
& IXGB_TX_FLAGS_CSUM
)
1368 popts
|= IXGB_TX_DESC_POPTS_TXSM
;
1370 if(tx_flags
& IXGB_TX_FLAGS_VLAN
) {
1371 cmd_type_len
|= IXGB_TX_DESC_CMD_VLE
;
1374 i
= tx_ring
->next_to_use
;
1377 buffer_info
= &tx_ring
->buffer_info
[i
];
1378 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1379 tx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
1380 tx_desc
->cmd_type_len
=
1381 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
1382 tx_desc
->status
= status
;
1383 tx_desc
->popts
= popts
;
1384 tx_desc
->vlan
= cpu_to_le16(vlan_id
);
1386 if(++i
== tx_ring
->count
) i
= 0;
1389 tx_desc
->cmd_type_len
|= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1390 | IXGB_TX_DESC_CMD_RS
);
1392 /* Force memory writes to complete before letting h/w
1393 * know there are new descriptors to fetch. (Only
1394 * applicable for weak-ordered memory model archs,
1395 * such as IA-64). */
1398 tx_ring
->next_to_use
= i
;
1399 IXGB_WRITE_REG(&adapter
->hw
, TDT
, i
);
1402 /* Tx Descriptors needed, worst case */
1403 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1404 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1405 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) + \
1406 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1
1409 ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
1411 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1413 unsigned int tx_flags
= 0;
1414 unsigned long flags
;
1419 dev_kfree_skb_any(skb
);
1424 local_irq_save(flags
);
1425 if (!spin_trylock(&adapter
->tx_lock
)) {
1426 /* Collision - tell upper layer to requeue */
1427 local_irq_restore(flags
);
1428 return NETDEV_TX_LOCKED
;
1431 spin_lock_irqsave(&adapter
->tx_lock
, flags
);
1434 if(unlikely(IXGB_DESC_UNUSED(&adapter
->tx_ring
) < DESC_NEEDED
)) {
1435 netif_stop_queue(netdev
);
1436 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1437 return NETDEV_TX_BUSY
;
1440 #ifndef NETIF_F_LLTX
1441 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1444 if(adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
1445 tx_flags
|= IXGB_TX_FLAGS_VLAN
;
1446 vlan_id
= vlan_tx_tag_get(skb
);
1449 first
= adapter
->tx_ring
.next_to_use
;
1451 tso
= ixgb_tso(adapter
, skb
);
1453 dev_kfree_skb_any(skb
);
1455 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1457 return NETDEV_TX_OK
;
1461 tx_flags
|= IXGB_TX_FLAGS_TSO
;
1462 else if(ixgb_tx_csum(adapter
, skb
))
1463 tx_flags
|= IXGB_TX_FLAGS_CSUM
;
1465 ixgb_tx_queue(adapter
, ixgb_tx_map(adapter
, skb
, first
), vlan_id
,
1468 netdev
->trans_start
= jiffies
;
1471 /* Make sure there is space in the ring for the next send. */
1472 if(unlikely(IXGB_DESC_UNUSED(&adapter
->tx_ring
) < DESC_NEEDED
))
1473 netif_stop_queue(netdev
);
1475 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
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 net_device
*netdev
)
1498 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1500 adapter
->tx_timeout_count
++;
1501 ixgb_down(adapter
, TRUE
);
1506 * ixgb_get_stats - Get System Network Statistics
1507 * @netdev: network interface device structure
1509 * Returns the address of the device statistics structure.
1510 * The statistics are actually updated from the timer callback.
1513 static struct net_device_stats
*
1514 ixgb_get_stats(struct net_device
*netdev
)
1516 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1518 return &adapter
->net_stats
;
1522 * ixgb_change_mtu - Change the Maximum Transfer Unit
1523 * @netdev: network interface device structure
1524 * @new_mtu: new value for maximum frame size
1526 * Returns 0 on success, negative on failure
1530 ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
)
1532 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1533 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1534 int old_max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1537 if((max_frame
< IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
)
1538 || (max_frame
> IXGB_MAX_JUMBO_FRAME_SIZE
+ ENET_FCS_LENGTH
)) {
1539 DPRINTK(PROBE
, ERR
, "Invalid MTU setting %d\n", new_mtu
);
1543 adapter
->rx_buffer_len
= max_frame
;
1545 netdev
->mtu
= new_mtu
;
1547 if ((old_max_frame
!= max_frame
) && netif_running(netdev
)) {
1548 ixgb_down(adapter
, TRUE
);
1556 * ixgb_update_stats - Update the board statistics counters.
1557 * @adapter: board private structure
1561 ixgb_update_stats(struct ixgb_adapter
*adapter
)
1563 struct net_device
*netdev
= adapter
->netdev
;
1564 struct pci_dev
*pdev
= adapter
->pdev
;
1566 /* Prevent stats update while adapter is being reset */
1567 if (pdev
->error_state
&& pdev
->error_state
!= pci_channel_io_normal
)
1570 if((netdev
->flags
& IFF_PROMISC
) || (netdev
->flags
& IFF_ALLMULTI
) ||
1571 (netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
)) {
1572 u64 multi
= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1573 u32 bcast_l
= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1574 u32 bcast_h
= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1575 u64 bcast
= ((u64
)bcast_h
<< 32) | bcast_l
;
1577 multi
|= ((u64
)IXGB_READ_REG(&adapter
->hw
, MPRCH
) << 32);
1578 /* fix up multicast stats by removing broadcasts */
1582 adapter
->stats
.mprcl
+= (multi
& 0xFFFFFFFF);
1583 adapter
->stats
.mprch
+= (multi
>> 32);
1584 adapter
->stats
.bprcl
+= bcast_l
;
1585 adapter
->stats
.bprch
+= bcast_h
;
1587 adapter
->stats
.mprcl
+= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1588 adapter
->stats
.mprch
+= IXGB_READ_REG(&adapter
->hw
, MPRCH
);
1589 adapter
->stats
.bprcl
+= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1590 adapter
->stats
.bprch
+= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1592 adapter
->stats
.tprl
+= IXGB_READ_REG(&adapter
->hw
, TPRL
);
1593 adapter
->stats
.tprh
+= IXGB_READ_REG(&adapter
->hw
, TPRH
);
1594 adapter
->stats
.gprcl
+= IXGB_READ_REG(&adapter
->hw
, GPRCL
);
1595 adapter
->stats
.gprch
+= IXGB_READ_REG(&adapter
->hw
, GPRCH
);
1596 adapter
->stats
.uprcl
+= IXGB_READ_REG(&adapter
->hw
, UPRCL
);
1597 adapter
->stats
.uprch
+= IXGB_READ_REG(&adapter
->hw
, UPRCH
);
1598 adapter
->stats
.vprcl
+= IXGB_READ_REG(&adapter
->hw
, VPRCL
);
1599 adapter
->stats
.vprch
+= IXGB_READ_REG(&adapter
->hw
, VPRCH
);
1600 adapter
->stats
.jprcl
+= IXGB_READ_REG(&adapter
->hw
, JPRCL
);
1601 adapter
->stats
.jprch
+= IXGB_READ_REG(&adapter
->hw
, JPRCH
);
1602 adapter
->stats
.gorcl
+= IXGB_READ_REG(&adapter
->hw
, GORCL
);
1603 adapter
->stats
.gorch
+= IXGB_READ_REG(&adapter
->hw
, GORCH
);
1604 adapter
->stats
.torl
+= IXGB_READ_REG(&adapter
->hw
, TORL
);
1605 adapter
->stats
.torh
+= IXGB_READ_REG(&adapter
->hw
, TORH
);
1606 adapter
->stats
.rnbc
+= IXGB_READ_REG(&adapter
->hw
, RNBC
);
1607 adapter
->stats
.ruc
+= IXGB_READ_REG(&adapter
->hw
, RUC
);
1608 adapter
->stats
.roc
+= IXGB_READ_REG(&adapter
->hw
, ROC
);
1609 adapter
->stats
.rlec
+= IXGB_READ_REG(&adapter
->hw
, RLEC
);
1610 adapter
->stats
.crcerrs
+= IXGB_READ_REG(&adapter
->hw
, CRCERRS
);
1611 adapter
->stats
.icbc
+= IXGB_READ_REG(&adapter
->hw
, ICBC
);
1612 adapter
->stats
.ecbc
+= IXGB_READ_REG(&adapter
->hw
, ECBC
);
1613 adapter
->stats
.mpc
+= IXGB_READ_REG(&adapter
->hw
, MPC
);
1614 adapter
->stats
.tptl
+= IXGB_READ_REG(&adapter
->hw
, TPTL
);
1615 adapter
->stats
.tpth
+= IXGB_READ_REG(&adapter
->hw
, TPTH
);
1616 adapter
->stats
.gptcl
+= IXGB_READ_REG(&adapter
->hw
, GPTCL
);
1617 adapter
->stats
.gptch
+= IXGB_READ_REG(&adapter
->hw
, GPTCH
);
1618 adapter
->stats
.bptcl
+= IXGB_READ_REG(&adapter
->hw
, BPTCL
);
1619 adapter
->stats
.bptch
+= IXGB_READ_REG(&adapter
->hw
, BPTCH
);
1620 adapter
->stats
.mptcl
+= IXGB_READ_REG(&adapter
->hw
, MPTCL
);
1621 adapter
->stats
.mptch
+= IXGB_READ_REG(&adapter
->hw
, MPTCH
);
1622 adapter
->stats
.uptcl
+= IXGB_READ_REG(&adapter
->hw
, UPTCL
);
1623 adapter
->stats
.uptch
+= IXGB_READ_REG(&adapter
->hw
, UPTCH
);
1624 adapter
->stats
.vptcl
+= IXGB_READ_REG(&adapter
->hw
, VPTCL
);
1625 adapter
->stats
.vptch
+= IXGB_READ_REG(&adapter
->hw
, VPTCH
);
1626 adapter
->stats
.jptcl
+= IXGB_READ_REG(&adapter
->hw
, JPTCL
);
1627 adapter
->stats
.jptch
+= IXGB_READ_REG(&adapter
->hw
, JPTCH
);
1628 adapter
->stats
.gotcl
+= IXGB_READ_REG(&adapter
->hw
, GOTCL
);
1629 adapter
->stats
.gotch
+= IXGB_READ_REG(&adapter
->hw
, GOTCH
);
1630 adapter
->stats
.totl
+= IXGB_READ_REG(&adapter
->hw
, TOTL
);
1631 adapter
->stats
.toth
+= IXGB_READ_REG(&adapter
->hw
, TOTH
);
1632 adapter
->stats
.dc
+= IXGB_READ_REG(&adapter
->hw
, DC
);
1633 adapter
->stats
.plt64c
+= IXGB_READ_REG(&adapter
->hw
, PLT64C
);
1634 adapter
->stats
.tsctc
+= IXGB_READ_REG(&adapter
->hw
, TSCTC
);
1635 adapter
->stats
.tsctfc
+= IXGB_READ_REG(&adapter
->hw
, TSCTFC
);
1636 adapter
->stats
.ibic
+= IXGB_READ_REG(&adapter
->hw
, IBIC
);
1637 adapter
->stats
.rfc
+= IXGB_READ_REG(&adapter
->hw
, RFC
);
1638 adapter
->stats
.lfc
+= IXGB_READ_REG(&adapter
->hw
, LFC
);
1639 adapter
->stats
.pfrc
+= IXGB_READ_REG(&adapter
->hw
, PFRC
);
1640 adapter
->stats
.pftc
+= IXGB_READ_REG(&adapter
->hw
, PFTC
);
1641 adapter
->stats
.mcfrc
+= IXGB_READ_REG(&adapter
->hw
, MCFRC
);
1642 adapter
->stats
.mcftc
+= IXGB_READ_REG(&adapter
->hw
, MCFTC
);
1643 adapter
->stats
.xonrxc
+= IXGB_READ_REG(&adapter
->hw
, XONRXC
);
1644 adapter
->stats
.xontxc
+= IXGB_READ_REG(&adapter
->hw
, XONTXC
);
1645 adapter
->stats
.xoffrxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFRXC
);
1646 adapter
->stats
.xofftxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFTXC
);
1647 adapter
->stats
.rjc
+= IXGB_READ_REG(&adapter
->hw
, RJC
);
1649 /* Fill out the OS statistics structure */
1651 adapter
->net_stats
.rx_packets
= adapter
->stats
.gprcl
;
1652 adapter
->net_stats
.tx_packets
= adapter
->stats
.gptcl
;
1653 adapter
->net_stats
.rx_bytes
= adapter
->stats
.gorcl
;
1654 adapter
->net_stats
.tx_bytes
= adapter
->stats
.gotcl
;
1655 adapter
->net_stats
.multicast
= adapter
->stats
.mprcl
;
1656 adapter
->net_stats
.collisions
= 0;
1658 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1659 * with a length in the type/len field */
1660 adapter
->net_stats
.rx_errors
=
1661 /* adapter->stats.rnbc + */ adapter
->stats
.crcerrs
+
1662 adapter
->stats
.ruc
+
1663 adapter
->stats
.roc
/*+ adapter->stats.rlec */ +
1664 adapter
->stats
.icbc
+
1665 adapter
->stats
.ecbc
+ adapter
->stats
.mpc
;
1668 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1671 adapter
->net_stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
1672 adapter
->net_stats
.rx_fifo_errors
= adapter
->stats
.mpc
;
1673 adapter
->net_stats
.rx_missed_errors
= adapter
->stats
.mpc
;
1674 adapter
->net_stats
.rx_over_errors
= adapter
->stats
.mpc
;
1676 adapter
->net_stats
.tx_errors
= 0;
1677 adapter
->net_stats
.rx_frame_errors
= 0;
1678 adapter
->net_stats
.tx_aborted_errors
= 0;
1679 adapter
->net_stats
.tx_carrier_errors
= 0;
1680 adapter
->net_stats
.tx_fifo_errors
= 0;
1681 adapter
->net_stats
.tx_heartbeat_errors
= 0;
1682 adapter
->net_stats
.tx_window_errors
= 0;
1685 #define IXGB_MAX_INTR 10
1687 * ixgb_intr - Interrupt Handler
1688 * @irq: interrupt number
1689 * @data: pointer to a network interface device structure
1690 * @pt_regs: CPU registers structure
1694 ixgb_intr(int irq
, void *data
, struct pt_regs
*regs
)
1696 struct net_device
*netdev
= data
;
1697 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1698 struct ixgb_hw
*hw
= &adapter
->hw
;
1699 uint32_t icr
= IXGB_READ_REG(hw
, ICR
);
1700 #ifndef CONFIG_IXGB_NAPI
1705 return IRQ_NONE
; /* Not our interrupt */
1707 if(unlikely(icr
& (IXGB_INT_RXSEQ
| IXGB_INT_LSC
))) {
1708 mod_timer(&adapter
->watchdog_timer
, jiffies
);
1711 #ifdef CONFIG_IXGB_NAPI
1712 if(netif_rx_schedule_prep(netdev
)) {
1714 /* Disable interrupts and register for poll. The flush
1715 of the posted write is intentionally left out.
1718 atomic_inc(&adapter
->irq_sem
);
1719 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
1720 __netif_rx_schedule(netdev
);
1723 /* yes, that is actually a & and it is meant to make sure that
1724 * every pass through this for loop checks both receive and
1725 * transmit queues for completed descriptors, intended to
1726 * avoid starvation issues and assist tx/rx fairness. */
1727 for(i
= 0; i
< IXGB_MAX_INTR
; i
++)
1728 if(!ixgb_clean_rx_irq(adapter
) &
1729 !ixgb_clean_tx_irq(adapter
))
1735 #ifdef CONFIG_IXGB_NAPI
1737 * ixgb_clean - NAPI Rx polling callback
1738 * @adapter: board private structure
1742 ixgb_clean(struct net_device
*netdev
, int *budget
)
1744 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1745 int work_to_do
= min(*budget
, netdev
->quota
);
1749 tx_cleaned
= ixgb_clean_tx_irq(adapter
);
1750 ixgb_clean_rx_irq(adapter
, &work_done
, work_to_do
);
1752 *budget
-= work_done
;
1753 netdev
->quota
-= work_done
;
1755 /* if no Tx and not enough Rx work done, exit the polling mode */
1756 if((!tx_cleaned
&& (work_done
== 0)) || !netif_running(netdev
)) {
1757 netif_rx_complete(netdev
);
1758 ixgb_irq_enable(adapter
);
1767 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1768 * @adapter: board private structure
1772 ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
)
1774 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1775 struct net_device
*netdev
= adapter
->netdev
;
1776 struct ixgb_tx_desc
*tx_desc
, *eop_desc
;
1777 struct ixgb_buffer
*buffer_info
;
1778 unsigned int i
, eop
;
1779 boolean_t cleaned
= FALSE
;
1781 i
= tx_ring
->next_to_clean
;
1782 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1783 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1785 while(eop_desc
->status
& IXGB_TX_DESC_STATUS_DD
) {
1787 for(cleaned
= FALSE
; !cleaned
; ) {
1788 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1789 buffer_info
= &tx_ring
->buffer_info
[i
];
1792 & (IXGB_TX_DESC_POPTS_TXSM
|
1793 IXGB_TX_DESC_POPTS_IXSM
))
1794 adapter
->hw_csum_tx_good
++;
1796 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
1798 *(uint32_t *)&(tx_desc
->status
) = 0;
1800 cleaned
= (i
== eop
);
1801 if(++i
== tx_ring
->count
) i
= 0;
1804 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1805 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1808 tx_ring
->next_to_clean
= i
;
1810 if (unlikely(netif_queue_stopped(netdev
))) {
1811 spin_lock(&adapter
->tx_lock
);
1812 if (netif_queue_stopped(netdev
) && netif_carrier_ok(netdev
) &&
1813 (IXGB_DESC_UNUSED(tx_ring
) >= DESC_NEEDED
))
1814 netif_wake_queue(netdev
);
1815 spin_unlock(&adapter
->tx_lock
);
1818 if(adapter
->detect_tx_hung
) {
1819 /* detect a transmit hang in hardware, this serializes the
1820 * check with the clearing of time_stamp and movement of i */
1821 adapter
->detect_tx_hung
= FALSE
;
1822 if (tx_ring
->buffer_info
[eop
].dma
&&
1823 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+ HZ
)
1824 && !(IXGB_READ_REG(&adapter
->hw
, STATUS
) &
1825 IXGB_STATUS_TXOFF
)) {
1826 /* detected Tx unit hang */
1827 DPRINTK(DRV
, ERR
, "Detected Tx Unit Hang\n"
1830 " next_to_use <%x>\n"
1831 " next_to_clean <%x>\n"
1832 "buffer_info[next_to_clean]\n"
1833 " time_stamp <%lx>\n"
1834 " next_to_watch <%x>\n"
1836 " next_to_watch.status <%x>\n",
1837 IXGB_READ_REG(&adapter
->hw
, TDH
),
1838 IXGB_READ_REG(&adapter
->hw
, TDT
),
1839 tx_ring
->next_to_use
,
1840 tx_ring
->next_to_clean
,
1841 tx_ring
->buffer_info
[eop
].time_stamp
,
1845 netif_stop_queue(netdev
);
1853 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1854 * @adapter: board private structure
1855 * @rx_desc: receive descriptor
1856 * @sk_buff: socket buffer with received data
1860 ixgb_rx_checksum(struct ixgb_adapter
*adapter
,
1861 struct ixgb_rx_desc
*rx_desc
,
1862 struct sk_buff
*skb
)
1864 /* Ignore Checksum bit is set OR
1865 * TCP Checksum has not been calculated
1867 if((rx_desc
->status
& IXGB_RX_DESC_STATUS_IXSM
) ||
1868 (!(rx_desc
->status
& IXGB_RX_DESC_STATUS_TCPCS
))) {
1869 skb
->ip_summed
= CHECKSUM_NONE
;
1873 /* At this point we know the hardware did the TCP checksum */
1874 /* now look at the TCP checksum error bit */
1875 if(rx_desc
->errors
& IXGB_RX_DESC_ERRORS_TCPE
) {
1876 /* let the stack verify checksum errors */
1877 skb
->ip_summed
= CHECKSUM_NONE
;
1878 adapter
->hw_csum_rx_error
++;
1880 /* TCP checksum is good */
1881 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1882 adapter
->hw_csum_rx_good
++;
1887 * ixgb_clean_rx_irq - Send received data up the network stack,
1888 * @adapter: board private structure
1892 #ifdef CONFIG_IXGB_NAPI
1893 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
, int *work_done
, int work_to_do
)
1895 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
)
1898 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1899 struct net_device
*netdev
= adapter
->netdev
;
1900 struct pci_dev
*pdev
= adapter
->pdev
;
1901 struct ixgb_rx_desc
*rx_desc
, *next_rxd
;
1902 struct ixgb_buffer
*buffer_info
, *next_buffer
, *next2_buffer
;
1905 boolean_t cleaned
= FALSE
;
1907 i
= rx_ring
->next_to_clean
;
1908 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
1909 buffer_info
= &rx_ring
->buffer_info
[i
];
1911 while(rx_desc
->status
& IXGB_RX_DESC_STATUS_DD
) {
1912 struct sk_buff
*skb
, *next_skb
;
1915 #ifdef CONFIG_IXGB_NAPI
1916 if(*work_done
>= work_to_do
)
1921 status
= rx_desc
->status
;
1922 skb
= buffer_info
->skb
;
1923 buffer_info
->skb
= NULL
;
1925 prefetch(skb
->data
);
1927 if(++i
== rx_ring
->count
) i
= 0;
1928 next_rxd
= IXGB_RX_DESC(*rx_ring
, i
);
1931 if((j
= i
+ 1) == rx_ring
->count
) j
= 0;
1932 next2_buffer
= &rx_ring
->buffer_info
[j
];
1933 prefetch(next2_buffer
);
1935 next_buffer
= &rx_ring
->buffer_info
[i
];
1936 next_skb
= next_buffer
->skb
;
1941 pci_unmap_single(pdev
,
1943 buffer_info
->length
,
1944 PCI_DMA_FROMDEVICE
);
1946 length
= le16_to_cpu(rx_desc
->length
);
1948 if(unlikely(!(status
& IXGB_RX_DESC_STATUS_EOP
))) {
1950 /* All receives must fit into a single buffer */
1952 IXGB_DBG("Receive packet consumed multiple buffers "
1953 "length<%x>\n", length
);
1955 dev_kfree_skb_irq(skb
);
1959 if (unlikely(rx_desc
->errors
1960 & (IXGB_RX_DESC_ERRORS_CE
| IXGB_RX_DESC_ERRORS_SE
1961 | IXGB_RX_DESC_ERRORS_P
|
1962 IXGB_RX_DESC_ERRORS_RXE
))) {
1964 dev_kfree_skb_irq(skb
);
1968 /* code added for copybreak, this should improve
1969 * performance for small packets with large amounts
1970 * of reassembly being done in the stack */
1971 #define IXGB_CB_LENGTH 256
1972 if (length
< IXGB_CB_LENGTH
) {
1973 struct sk_buff
*new_skb
=
1974 netdev_alloc_skb(netdev
, length
+ NET_IP_ALIGN
);
1976 skb_reserve(new_skb
, NET_IP_ALIGN
);
1977 memcpy(new_skb
->data
- NET_IP_ALIGN
,
1978 skb
->data
- NET_IP_ALIGN
,
1979 length
+ NET_IP_ALIGN
);
1980 /* save the skb in buffer_info as good */
1981 buffer_info
->skb
= skb
;
1985 /* end copybreak code */
1988 skb_put(skb
, length
);
1990 /* Receive Checksum Offload */
1991 ixgb_rx_checksum(adapter
, rx_desc
, skb
);
1993 skb
->protocol
= eth_type_trans(skb
, netdev
);
1994 #ifdef CONFIG_IXGB_NAPI
1995 if(adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
1996 vlan_hwaccel_receive_skb(skb
, adapter
->vlgrp
,
1997 le16_to_cpu(rx_desc
->special
) &
1998 IXGB_RX_DESC_SPECIAL_VLAN_MASK
);
2000 netif_receive_skb(skb
);
2002 #else /* CONFIG_IXGB_NAPI */
2003 if(adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
2004 vlan_hwaccel_rx(skb
, adapter
->vlgrp
,
2005 le16_to_cpu(rx_desc
->special
) &
2006 IXGB_RX_DESC_SPECIAL_VLAN_MASK
);
2010 #endif /* CONFIG_IXGB_NAPI */
2011 netdev
->last_rx
= jiffies
;
2014 /* clean up descriptor, might be written over by hw */
2015 rx_desc
->status
= 0;
2017 /* use prefetched values */
2019 buffer_info
= next_buffer
;
2022 rx_ring
->next_to_clean
= i
;
2024 ixgb_alloc_rx_buffers(adapter
);
2030 * ixgb_alloc_rx_buffers - Replace used receive buffers
2031 * @adapter: address of board private structure
2035 ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
)
2037 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
2038 struct net_device
*netdev
= adapter
->netdev
;
2039 struct pci_dev
*pdev
= adapter
->pdev
;
2040 struct ixgb_rx_desc
*rx_desc
;
2041 struct ixgb_buffer
*buffer_info
;
2042 struct sk_buff
*skb
;
2044 int num_group_tail_writes
;
2047 i
= rx_ring
->next_to_use
;
2048 buffer_info
= &rx_ring
->buffer_info
[i
];
2049 cleancount
= IXGB_DESC_UNUSED(rx_ring
);
2051 num_group_tail_writes
= IXGB_RX_BUFFER_WRITE
;
2053 /* leave three descriptors unused */
2054 while(--cleancount
> 2) {
2055 /* recycle! its good for you */
2056 skb
= buffer_info
->skb
;
2062 skb
= netdev_alloc_skb(netdev
, adapter
->rx_buffer_len
2064 if (unlikely(!skb
)) {
2065 /* Better luck next round */
2066 adapter
->alloc_rx_buff_failed
++;
2070 /* Make buffer alignment 2 beyond a 16 byte boundary
2071 * this will result in a 16 byte aligned IP header after
2072 * the 14 byte MAC header is removed
2074 skb_reserve(skb
, NET_IP_ALIGN
);
2076 buffer_info
->skb
= skb
;
2077 buffer_info
->length
= adapter
->rx_buffer_len
;
2079 buffer_info
->dma
= pci_map_single(pdev
,
2081 adapter
->rx_buffer_len
,
2082 PCI_DMA_FROMDEVICE
);
2084 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
2085 rx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
2086 /* guarantee DD bit not set now before h/w gets descriptor
2087 * this is the rest of the workaround for h/w double
2089 rx_desc
->status
= 0;
2092 if(++i
== rx_ring
->count
) i
= 0;
2093 buffer_info
= &rx_ring
->buffer_info
[i
];
2096 if (likely(rx_ring
->next_to_use
!= i
)) {
2097 rx_ring
->next_to_use
= i
;
2098 if (unlikely(i
-- == 0))
2099 i
= (rx_ring
->count
- 1);
2101 /* Force memory writes to complete before letting h/w
2102 * know there are new descriptors to fetch. (Only
2103 * applicable for weak-ordered memory model archs, such
2106 IXGB_WRITE_REG(&adapter
->hw
, RDT
, i
);
2111 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2113 * @param netdev network interface device structure
2114 * @param grp indicates to enable or disable tagging/stripping
2117 ixgb_vlan_rx_register(struct net_device
*netdev
, struct vlan_group
*grp
)
2119 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2120 uint32_t ctrl
, rctl
;
2122 ixgb_irq_disable(adapter
);
2123 adapter
->vlgrp
= grp
;
2126 /* enable VLAN tag insert/strip */
2127 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2128 ctrl
|= IXGB_CTRL0_VME
;
2129 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2131 /* enable VLAN receive filtering */
2133 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2134 rctl
|= IXGB_RCTL_VFE
;
2135 rctl
&= ~IXGB_RCTL_CFIEN
;
2136 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2138 /* disable VLAN tag insert/strip */
2140 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2141 ctrl
&= ~IXGB_CTRL0_VME
;
2142 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2144 /* disable VLAN filtering */
2146 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2147 rctl
&= ~IXGB_RCTL_VFE
;
2148 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2151 ixgb_irq_enable(adapter
);
2155 ixgb_vlan_rx_add_vid(struct net_device
*netdev
, uint16_t vid
)
2157 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2158 uint32_t vfta
, index
;
2160 /* add VID to filter table */
2162 index
= (vid
>> 5) & 0x7F;
2163 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2164 vfta
|= (1 << (vid
& 0x1F));
2165 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2169 ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, uint16_t vid
)
2171 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2172 uint32_t vfta
, index
;
2174 ixgb_irq_disable(adapter
);
2177 adapter
->vlgrp
->vlan_devices
[vid
] = NULL
;
2179 ixgb_irq_enable(adapter
);
2181 /* remove VID from filter table*/
2183 index
= (vid
>> 5) & 0x7F;
2184 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2185 vfta
&= ~(1 << (vid
& 0x1F));
2186 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2190 ixgb_restore_vlan(struct ixgb_adapter
*adapter
)
2192 ixgb_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
2194 if(adapter
->vlgrp
) {
2196 for(vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
2197 if(!adapter
->vlgrp
->vlan_devices
[vid
])
2199 ixgb_vlan_rx_add_vid(adapter
->netdev
, vid
);
2204 #ifdef CONFIG_NET_POLL_CONTROLLER
2206 * Polling 'interrupt' - used by things like netconsole to send skbs
2207 * without having to re-enable interrupts. It's not called while
2208 * the interrupt routine is executing.
2211 static void ixgb_netpoll(struct net_device
*dev
)
2213 struct ixgb_adapter
*adapter
= netdev_priv(dev
);
2215 disable_irq(adapter
->pdev
->irq
);
2216 ixgb_intr(adapter
->pdev
->irq
, dev
, NULL
);
2217 enable_irq(adapter
->pdev
->irq
);
2222 * ixgb_io_error_detected() - called when PCI error is detected
2223 * @pdev pointer to pci device with error
2224 * @state pci channel state after error
2226 * This callback is called by the PCI subsystem whenever
2227 * a PCI bus error is detected.
2229 static pci_ers_result_t
ixgb_io_error_detected (struct pci_dev
*pdev
,
2230 enum pci_channel_state state
)
2232 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2233 struct ixgb_adapter
*adapter
= netdev
->priv
;
2235 if(netif_running(netdev
))
2236 ixgb_down(adapter
, TRUE
);
2238 pci_disable_device(pdev
);
2240 /* Request a slot reset. */
2241 return PCI_ERS_RESULT_NEED_RESET
;
2245 * ixgb_io_slot_reset - called after the pci bus has been reset.
2246 * @pdev pointer to pci device with error
2248 * This callback is called after the PCI buss has been reset.
2249 * Basically, this tries to restart the card from scratch.
2250 * This is a shortened version of the device probe/discovery code,
2251 * it resembles the first-half of the ixgb_probe() routine.
2253 static pci_ers_result_t
ixgb_io_slot_reset (struct pci_dev
*pdev
)
2255 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2256 struct ixgb_adapter
*adapter
= netdev
->priv
;
2258 if(pci_enable_device(pdev
)) {
2259 DPRINTK(PROBE
, ERR
, "Cannot re-enable PCI device after reset.\n");
2260 return PCI_ERS_RESULT_DISCONNECT
;
2263 /* Perform card reset only on one instance of the card */
2264 if (0 != PCI_FUNC (pdev
->devfn
))
2265 return PCI_ERS_RESULT_RECOVERED
;
2267 pci_set_master(pdev
);
2269 netif_carrier_off(netdev
);
2270 netif_stop_queue(netdev
);
2271 ixgb_reset(adapter
);
2273 /* Make sure the EEPROM is good */
2274 if(!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
2275 DPRINTK(PROBE
, ERR
, "After reset, the EEPROM checksum is not valid.\n");
2276 return PCI_ERS_RESULT_DISCONNECT
;
2278 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
2279 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
2281 if(!is_valid_ether_addr(netdev
->perm_addr
)) {
2282 DPRINTK(PROBE
, ERR
, "After reset, invalid MAC address.\n");
2283 return PCI_ERS_RESULT_DISCONNECT
;
2286 return PCI_ERS_RESULT_RECOVERED
;
2290 * ixgb_io_resume - called when its OK to resume normal operations
2291 * @pdev pointer to pci device with error
2293 * The error recovery driver tells us that its OK to resume
2294 * normal operation. Implementation resembles the second-half
2295 * of the ixgb_probe() routine.
2297 static void ixgb_io_resume (struct pci_dev
*pdev
)
2299 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2300 struct ixgb_adapter
*adapter
= netdev
->priv
;
2302 pci_set_master(pdev
);
2304 if(netif_running(netdev
)) {
2305 if(ixgb_up(adapter
)) {
2306 printk ("ixgb: can't bring device back up after reset\n");
2311 netif_device_attach(netdev
);
2312 mod_timer(&adapter
->watchdog_timer
, jiffies
);