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
;
230 int err
, irq_flags
= IRQF_SHARED
;
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 /* only enable MSI if bus is in PCI-X mode */
250 if (IXGB_READ_REG(&adapter
->hw
, STATUS
) & IXGB_STATUS_PCIX_MODE
) {
251 err
= pci_enable_msi(adapter
->pdev
);
253 adapter
->have_msi
= 1;
256 /* proceed to try to request regular interrupt */
259 err
= request_irq(adapter
->pdev
->irq
, &ixgb_intr
, irq_flags
,
260 netdev
->name
, netdev
);
262 if (adapter
->have_msi
)
263 pci_disable_msi(adapter
->pdev
);
265 "Unable to allocate interrupt Error: %d\n", err
);
269 if((hw
->max_frame_size
!= max_frame
) ||
270 (hw
->max_frame_size
!=
271 (IXGB_READ_REG(hw
, MFS
) >> IXGB_MFS_SHIFT
))) {
273 hw
->max_frame_size
= max_frame
;
275 IXGB_WRITE_REG(hw
, MFS
, hw
->max_frame_size
<< IXGB_MFS_SHIFT
);
277 if(hw
->max_frame_size
>
278 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
) {
279 uint32_t ctrl0
= IXGB_READ_REG(hw
, CTRL0
);
281 if(!(ctrl0
& IXGB_CTRL0_JFE
)) {
282 ctrl0
|= IXGB_CTRL0_JFE
;
283 IXGB_WRITE_REG(hw
, CTRL0
, ctrl0
);
288 mod_timer(&adapter
->watchdog_timer
, jiffies
);
290 #ifdef CONFIG_IXGB_NAPI
291 netif_poll_enable(netdev
);
293 ixgb_irq_enable(adapter
);
299 ixgb_down(struct ixgb_adapter
*adapter
, boolean_t kill_watchdog
)
301 struct net_device
*netdev
= adapter
->netdev
;
303 ixgb_irq_disable(adapter
);
304 free_irq(adapter
->pdev
->irq
, netdev
);
306 if (adapter
->have_msi
)
307 pci_disable_msi(adapter
->pdev
);
310 del_timer_sync(&adapter
->watchdog_timer
);
311 #ifdef CONFIG_IXGB_NAPI
312 netif_poll_disable(netdev
);
314 adapter
->link_speed
= 0;
315 adapter
->link_duplex
= 0;
316 netif_carrier_off(netdev
);
317 netif_stop_queue(netdev
);
320 ixgb_clean_tx_ring(adapter
);
321 ixgb_clean_rx_ring(adapter
);
325 ixgb_reset(struct ixgb_adapter
*adapter
)
328 ixgb_adapter_stop(&adapter
->hw
);
329 if(!ixgb_init_hw(&adapter
->hw
))
330 DPRINTK(PROBE
, ERR
, "ixgb_init_hw failed.\n");
334 * ixgb_probe - Device Initialization Routine
335 * @pdev: PCI device information struct
336 * @ent: entry in ixgb_pci_tbl
338 * Returns 0 on success, negative on failure
340 * ixgb_probe initializes an adapter identified by a pci_dev structure.
341 * The OS initialization, configuring of the adapter private structure,
342 * and a hardware reset occur.
346 ixgb_probe(struct pci_dev
*pdev
,
347 const struct pci_device_id
*ent
)
349 struct net_device
*netdev
= NULL
;
350 struct ixgb_adapter
*adapter
;
351 static int cards_found
= 0;
352 unsigned long mmio_start
;
358 if((err
= pci_enable_device(pdev
)))
361 if(!(err
= pci_set_dma_mask(pdev
, DMA_64BIT_MASK
)) &&
362 !(err
= pci_set_consistent_dma_mask(pdev
, DMA_64BIT_MASK
))) {
365 if((err
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
)) ||
366 (err
= pci_set_consistent_dma_mask(pdev
, DMA_32BIT_MASK
))) {
368 "ixgb: No usable DMA configuration, aborting\n");
374 if((err
= pci_request_regions(pdev
, ixgb_driver_name
)))
375 goto err_request_regions
;
377 pci_set_master(pdev
);
379 netdev
= alloc_etherdev(sizeof(struct ixgb_adapter
));
382 goto err_alloc_etherdev
;
385 SET_MODULE_OWNER(netdev
);
386 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
388 pci_set_drvdata(pdev
, netdev
);
389 adapter
= netdev_priv(netdev
);
390 adapter
->netdev
= netdev
;
391 adapter
->pdev
= pdev
;
392 adapter
->hw
.back
= adapter
;
393 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_DEBUG_LEVEL_SHIFT
);
395 mmio_start
= pci_resource_start(pdev
, BAR_0
);
396 mmio_len
= pci_resource_len(pdev
, BAR_0
);
398 adapter
->hw
.hw_addr
= ioremap(mmio_start
, mmio_len
);
399 if(!adapter
->hw
.hw_addr
) {
404 for(i
= BAR_1
; i
<= BAR_5
; i
++) {
405 if(pci_resource_len(pdev
, i
) == 0)
407 if(pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
408 adapter
->hw
.io_base
= pci_resource_start(pdev
, i
);
413 netdev
->open
= &ixgb_open
;
414 netdev
->stop
= &ixgb_close
;
415 netdev
->hard_start_xmit
= &ixgb_xmit_frame
;
416 netdev
->get_stats
= &ixgb_get_stats
;
417 netdev
->set_multicast_list
= &ixgb_set_multi
;
418 netdev
->set_mac_address
= &ixgb_set_mac
;
419 netdev
->change_mtu
= &ixgb_change_mtu
;
420 ixgb_set_ethtool_ops(netdev
);
421 netdev
->tx_timeout
= &ixgb_tx_timeout
;
422 netdev
->watchdog_timeo
= 5 * HZ
;
423 #ifdef CONFIG_IXGB_NAPI
424 netdev
->poll
= &ixgb_clean
;
427 netdev
->vlan_rx_register
= ixgb_vlan_rx_register
;
428 netdev
->vlan_rx_add_vid
= ixgb_vlan_rx_add_vid
;
429 netdev
->vlan_rx_kill_vid
= ixgb_vlan_rx_kill_vid
;
430 #ifdef CONFIG_NET_POLL_CONTROLLER
431 netdev
->poll_controller
= ixgb_netpoll
;
434 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
435 netdev
->mem_start
= mmio_start
;
436 netdev
->mem_end
= mmio_start
+ mmio_len
;
437 netdev
->base_addr
= adapter
->hw
.io_base
;
439 adapter
->bd_number
= cards_found
;
440 adapter
->link_speed
= 0;
441 adapter
->link_duplex
= 0;
443 /* setup the private structure */
445 if((err
= ixgb_sw_init(adapter
)))
448 netdev
->features
= NETIF_F_SG
|
452 NETIF_F_HW_VLAN_FILTER
;
453 netdev
->features
|= NETIF_F_TSO
;
455 netdev
->features
|= NETIF_F_LLTX
;
459 netdev
->features
|= NETIF_F_HIGHDMA
;
461 /* make sure the EEPROM is good */
463 if(!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
464 DPRINTK(PROBE
, ERR
, "The EEPROM Checksum Is Not Valid\n");
469 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
470 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
472 if(!is_valid_ether_addr(netdev
->perm_addr
)) {
473 DPRINTK(PROBE
, ERR
, "Invalid MAC Address\n");
478 adapter
->part_num
= ixgb_get_ee_pba_number(&adapter
->hw
);
480 init_timer(&adapter
->watchdog_timer
);
481 adapter
->watchdog_timer
.function
= &ixgb_watchdog
;
482 adapter
->watchdog_timer
.data
= (unsigned long)adapter
;
484 INIT_WORK(&adapter
->tx_timeout_task
, ixgb_tx_timeout_task
);
486 strcpy(netdev
->name
, "eth%d");
487 if((err
= register_netdev(netdev
)))
490 /* we're going to reset, so assume we have no link for now */
492 netif_carrier_off(netdev
);
493 netif_stop_queue(netdev
);
495 DPRINTK(PROBE
, INFO
, "Intel(R) PRO/10GbE Network Connection\n");
496 ixgb_check_options(adapter
);
497 /* reset the hardware with the new settings */
507 iounmap(adapter
->hw
.hw_addr
);
511 pci_release_regions(pdev
);
514 pci_disable_device(pdev
);
519 * ixgb_remove - Device Removal Routine
520 * @pdev: PCI device information struct
522 * ixgb_remove is called by the PCI subsystem to alert the driver
523 * that it should release a PCI device. The could be caused by a
524 * Hot-Plug event, or because the driver is going to be removed from
528 static void __devexit
529 ixgb_remove(struct pci_dev
*pdev
)
531 struct net_device
*netdev
= pci_get_drvdata(pdev
);
532 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
534 unregister_netdev(netdev
);
536 iounmap(adapter
->hw
.hw_addr
);
537 pci_release_regions(pdev
);
543 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
544 * @adapter: board private structure to initialize
546 * ixgb_sw_init initializes the Adapter private data structure.
547 * Fields are initialized based on PCI device information and
548 * OS network device settings (MTU size).
552 ixgb_sw_init(struct ixgb_adapter
*adapter
)
554 struct ixgb_hw
*hw
= &adapter
->hw
;
555 struct net_device
*netdev
= adapter
->netdev
;
556 struct pci_dev
*pdev
= adapter
->pdev
;
558 /* PCI config space info */
560 hw
->vendor_id
= pdev
->vendor
;
561 hw
->device_id
= pdev
->device
;
562 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
563 hw
->subsystem_id
= pdev
->subsystem_device
;
565 hw
->max_frame_size
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
566 adapter
->rx_buffer_len
= hw
->max_frame_size
;
568 if((hw
->device_id
== IXGB_DEVICE_ID_82597EX
)
569 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_CX4
)
570 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_LR
)
571 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_SR
))
572 hw
->mac_type
= ixgb_82597
;
574 /* should never have loaded on this device */
575 DPRINTK(PROBE
, ERR
, "unsupported device id\n");
578 /* enable flow control to be programmed */
581 atomic_set(&adapter
->irq_sem
, 1);
582 spin_lock_init(&adapter
->tx_lock
);
588 * ixgb_open - Called when a network interface is made active
589 * @netdev: network interface device structure
591 * Returns 0 on success, negative value on failure
593 * The open entry point is called when a network interface is made
594 * active by the system (IFF_UP). At this point all resources needed
595 * for transmit and receive operations are allocated, the interrupt
596 * handler is registered with the OS, the watchdog timer is started,
597 * and the stack is notified that the interface is ready.
601 ixgb_open(struct net_device
*netdev
)
603 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
606 /* allocate transmit descriptors */
608 if((err
= ixgb_setup_tx_resources(adapter
)))
611 /* allocate receive descriptors */
613 if((err
= ixgb_setup_rx_resources(adapter
)))
616 if((err
= ixgb_up(adapter
)))
622 ixgb_free_rx_resources(adapter
);
624 ixgb_free_tx_resources(adapter
);
632 * ixgb_close - Disables a network interface
633 * @netdev: network interface device structure
635 * Returns 0, this is not allowed to fail
637 * The close entry point is called when an interface is de-activated
638 * by the OS. The hardware is still under the drivers control, but
639 * needs to be disabled. A global MAC reset is issued to stop the
640 * hardware, and all transmit and receive resources are freed.
644 ixgb_close(struct net_device
*netdev
)
646 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
648 ixgb_down(adapter
, TRUE
);
650 ixgb_free_tx_resources(adapter
);
651 ixgb_free_rx_resources(adapter
);
657 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
658 * @adapter: board private structure
660 * Return 0 on success, negative on failure
664 ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
)
666 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
667 struct pci_dev
*pdev
= adapter
->pdev
;
670 size
= sizeof(struct ixgb_buffer
) * txdr
->count
;
671 txdr
->buffer_info
= vmalloc(size
);
672 if(!txdr
->buffer_info
) {
674 "Unable to allocate transmit descriptor ring memory\n");
677 memset(txdr
->buffer_info
, 0, size
);
679 /* round up to nearest 4K */
681 txdr
->size
= txdr
->count
* sizeof(struct ixgb_tx_desc
);
682 txdr
->size
= ALIGN(txdr
->size
, 4096);
684 txdr
->desc
= pci_alloc_consistent(pdev
, txdr
->size
, &txdr
->dma
);
686 vfree(txdr
->buffer_info
);
688 "Unable to allocate transmit descriptor memory\n");
691 memset(txdr
->desc
, 0, txdr
->size
);
693 txdr
->next_to_use
= 0;
694 txdr
->next_to_clean
= 0;
700 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
701 * @adapter: board private structure
703 * Configure the Tx unit of the MAC after a reset.
707 ixgb_configure_tx(struct ixgb_adapter
*adapter
)
709 uint64_t tdba
= adapter
->tx_ring
.dma
;
710 uint32_t tdlen
= adapter
->tx_ring
.count
* sizeof(struct ixgb_tx_desc
);
712 struct ixgb_hw
*hw
= &adapter
->hw
;
714 /* Setup the Base and Length of the Tx Descriptor Ring
715 * tx_ring.dma can be either a 32 or 64 bit value
718 IXGB_WRITE_REG(hw
, TDBAL
, (tdba
& 0x00000000ffffffffULL
));
719 IXGB_WRITE_REG(hw
, TDBAH
, (tdba
>> 32));
721 IXGB_WRITE_REG(hw
, TDLEN
, tdlen
);
723 /* Setup the HW Tx Head and Tail descriptor pointers */
725 IXGB_WRITE_REG(hw
, TDH
, 0);
726 IXGB_WRITE_REG(hw
, TDT
, 0);
728 /* don't set up txdctl, it induces performance problems if configured
730 /* Set the Tx Interrupt Delay register */
732 IXGB_WRITE_REG(hw
, TIDV
, adapter
->tx_int_delay
);
734 /* Program the Transmit Control Register */
736 tctl
= IXGB_TCTL_TCE
| IXGB_TCTL_TXEN
| IXGB_TCTL_TPDE
;
737 IXGB_WRITE_REG(hw
, TCTL
, tctl
);
739 /* Setup Transmit Descriptor Settings for this adapter */
740 adapter
->tx_cmd_type
=
742 | (adapter
->tx_int_delay_enable
? IXGB_TX_DESC_CMD_IDE
: 0);
746 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
747 * @adapter: board private structure
749 * Returns 0 on success, negative on failure
753 ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
)
755 struct ixgb_desc_ring
*rxdr
= &adapter
->rx_ring
;
756 struct pci_dev
*pdev
= adapter
->pdev
;
759 size
= sizeof(struct ixgb_buffer
) * rxdr
->count
;
760 rxdr
->buffer_info
= vmalloc(size
);
761 if(!rxdr
->buffer_info
) {
763 "Unable to allocate receive descriptor ring\n");
766 memset(rxdr
->buffer_info
, 0, size
);
768 /* Round up to nearest 4K */
770 rxdr
->size
= rxdr
->count
* sizeof(struct ixgb_rx_desc
);
771 rxdr
->size
= ALIGN(rxdr
->size
, 4096);
773 rxdr
->desc
= pci_alloc_consistent(pdev
, rxdr
->size
, &rxdr
->dma
);
776 vfree(rxdr
->buffer_info
);
778 "Unable to allocate receive descriptors\n");
781 memset(rxdr
->desc
, 0, rxdr
->size
);
783 rxdr
->next_to_clean
= 0;
784 rxdr
->next_to_use
= 0;
790 * ixgb_setup_rctl - configure the receive control register
791 * @adapter: Board private structure
795 ixgb_setup_rctl(struct ixgb_adapter
*adapter
)
799 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
801 rctl
&= ~(3 << IXGB_RCTL_MO_SHIFT
);
804 IXGB_RCTL_BAM
| IXGB_RCTL_RDMTS_1_2
|
805 IXGB_RCTL_RXEN
| IXGB_RCTL_CFF
|
806 (adapter
->hw
.mc_filter_type
<< IXGB_RCTL_MO_SHIFT
);
808 rctl
|= IXGB_RCTL_SECRC
;
810 if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_2048
)
811 rctl
|= IXGB_RCTL_BSIZE_2048
;
812 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_4096
)
813 rctl
|= IXGB_RCTL_BSIZE_4096
;
814 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_8192
)
815 rctl
|= IXGB_RCTL_BSIZE_8192
;
816 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_16384
)
817 rctl
|= IXGB_RCTL_BSIZE_16384
;
819 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
823 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
824 * @adapter: board private structure
826 * Configure the Rx unit of the MAC after a reset.
830 ixgb_configure_rx(struct ixgb_adapter
*adapter
)
832 uint64_t rdba
= adapter
->rx_ring
.dma
;
833 uint32_t rdlen
= adapter
->rx_ring
.count
* sizeof(struct ixgb_rx_desc
);
834 struct ixgb_hw
*hw
= &adapter
->hw
;
839 /* make sure receives are disabled while setting up the descriptors */
841 rctl
= IXGB_READ_REG(hw
, RCTL
);
842 IXGB_WRITE_REG(hw
, RCTL
, rctl
& ~IXGB_RCTL_RXEN
);
844 /* set the Receive Delay Timer Register */
846 IXGB_WRITE_REG(hw
, RDTR
, adapter
->rx_int_delay
);
848 /* Setup the Base and Length of the Rx Descriptor Ring */
850 IXGB_WRITE_REG(hw
, RDBAL
, (rdba
& 0x00000000ffffffffULL
));
851 IXGB_WRITE_REG(hw
, RDBAH
, (rdba
>> 32));
853 IXGB_WRITE_REG(hw
, RDLEN
, rdlen
);
855 /* Setup the HW Rx Head and Tail Descriptor Pointers */
856 IXGB_WRITE_REG(hw
, RDH
, 0);
857 IXGB_WRITE_REG(hw
, RDT
, 0);
859 /* set up pre-fetching of receive buffers so we get some before we
860 * run out (default hardware behavior is to run out before fetching
861 * more). This sets up to fetch if HTHRESH rx descriptors are avail
862 * and the descriptors in hw cache are below PTHRESH. This avoids
863 * the hardware behavior of fetching <=512 descriptors in a single
864 * burst that pre-empts all other activity, usually causing fifo
866 /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
867 rxdctl
= RXDCTL_WTHRESH_DEFAULT
<< IXGB_RXDCTL_WTHRESH_SHIFT
|
868 RXDCTL_HTHRESH_DEFAULT
<< IXGB_RXDCTL_HTHRESH_SHIFT
|
869 RXDCTL_PTHRESH_DEFAULT
<< IXGB_RXDCTL_PTHRESH_SHIFT
;
870 IXGB_WRITE_REG(hw
, RXDCTL
, rxdctl
);
872 /* Enable Receive Checksum Offload for TCP and UDP */
873 if(adapter
->rx_csum
== TRUE
) {
874 rxcsum
= IXGB_READ_REG(hw
, RXCSUM
);
875 rxcsum
|= IXGB_RXCSUM_TUOFL
;
876 IXGB_WRITE_REG(hw
, RXCSUM
, rxcsum
);
879 /* Enable Receives */
881 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
885 * ixgb_free_tx_resources - Free Tx Resources
886 * @adapter: board private structure
888 * Free all transmit software resources
892 ixgb_free_tx_resources(struct ixgb_adapter
*adapter
)
894 struct pci_dev
*pdev
= adapter
->pdev
;
896 ixgb_clean_tx_ring(adapter
);
898 vfree(adapter
->tx_ring
.buffer_info
);
899 adapter
->tx_ring
.buffer_info
= NULL
;
901 pci_free_consistent(pdev
, adapter
->tx_ring
.size
,
902 adapter
->tx_ring
.desc
, adapter
->tx_ring
.dma
);
904 adapter
->tx_ring
.desc
= NULL
;
908 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter
*adapter
,
909 struct ixgb_buffer
*buffer_info
)
911 struct pci_dev
*pdev
= adapter
->pdev
;
913 if (buffer_info
->dma
)
914 pci_unmap_page(pdev
, buffer_info
->dma
, buffer_info
->length
,
917 if (buffer_info
->skb
)
918 dev_kfree_skb_any(buffer_info
->skb
);
920 buffer_info
->skb
= NULL
;
921 buffer_info
->dma
= 0;
922 buffer_info
->time_stamp
= 0;
923 /* these fields must always be initialized in tx
924 * buffer_info->length = 0;
925 * buffer_info->next_to_watch = 0; */
929 * ixgb_clean_tx_ring - Free Tx Buffers
930 * @adapter: board private structure
934 ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
)
936 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
937 struct ixgb_buffer
*buffer_info
;
941 /* Free all the Tx ring sk_buffs */
943 for(i
= 0; i
< tx_ring
->count
; i
++) {
944 buffer_info
= &tx_ring
->buffer_info
[i
];
945 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
948 size
= sizeof(struct ixgb_buffer
) * tx_ring
->count
;
949 memset(tx_ring
->buffer_info
, 0, size
);
951 /* Zero out the descriptor ring */
953 memset(tx_ring
->desc
, 0, tx_ring
->size
);
955 tx_ring
->next_to_use
= 0;
956 tx_ring
->next_to_clean
= 0;
958 IXGB_WRITE_REG(&adapter
->hw
, TDH
, 0);
959 IXGB_WRITE_REG(&adapter
->hw
, TDT
, 0);
963 * ixgb_free_rx_resources - Free Rx Resources
964 * @adapter: board private structure
966 * Free all receive software resources
970 ixgb_free_rx_resources(struct ixgb_adapter
*adapter
)
972 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
973 struct pci_dev
*pdev
= adapter
->pdev
;
975 ixgb_clean_rx_ring(adapter
);
977 vfree(rx_ring
->buffer_info
);
978 rx_ring
->buffer_info
= NULL
;
980 pci_free_consistent(pdev
, rx_ring
->size
, rx_ring
->desc
, rx_ring
->dma
);
982 rx_ring
->desc
= NULL
;
986 * ixgb_clean_rx_ring - Free Rx Buffers
987 * @adapter: board private structure
991 ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
)
993 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
994 struct ixgb_buffer
*buffer_info
;
995 struct pci_dev
*pdev
= adapter
->pdev
;
999 /* Free all the Rx ring sk_buffs */
1001 for(i
= 0; i
< rx_ring
->count
; i
++) {
1002 buffer_info
= &rx_ring
->buffer_info
[i
];
1003 if(buffer_info
->skb
) {
1005 pci_unmap_single(pdev
,
1007 buffer_info
->length
,
1008 PCI_DMA_FROMDEVICE
);
1010 dev_kfree_skb(buffer_info
->skb
);
1012 buffer_info
->skb
= NULL
;
1016 size
= sizeof(struct ixgb_buffer
) * rx_ring
->count
;
1017 memset(rx_ring
->buffer_info
, 0, size
);
1019 /* Zero out the descriptor ring */
1021 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1023 rx_ring
->next_to_clean
= 0;
1024 rx_ring
->next_to_use
= 0;
1026 IXGB_WRITE_REG(&adapter
->hw
, RDH
, 0);
1027 IXGB_WRITE_REG(&adapter
->hw
, RDT
, 0);
1031 * ixgb_set_mac - Change the Ethernet Address of the NIC
1032 * @netdev: network interface device structure
1033 * @p: pointer to an address structure
1035 * Returns 0 on success, negative on failure
1039 ixgb_set_mac(struct net_device
*netdev
, void *p
)
1041 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1042 struct sockaddr
*addr
= p
;
1044 if(!is_valid_ether_addr(addr
->sa_data
))
1045 return -EADDRNOTAVAIL
;
1047 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1049 ixgb_rar_set(&adapter
->hw
, addr
->sa_data
, 0);
1055 * ixgb_set_multi - Multicast and Promiscuous mode set
1056 * @netdev: network interface device structure
1058 * The set_multi entry point is called whenever the multicast address
1059 * list or the network interface flags are updated. This routine is
1060 * responsible for configuring the hardware for proper multicast,
1061 * promiscuous mode, and all-multi behavior.
1065 ixgb_set_multi(struct net_device
*netdev
)
1067 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1068 struct ixgb_hw
*hw
= &adapter
->hw
;
1069 struct dev_mc_list
*mc_ptr
;
1073 /* Check for Promiscuous and All Multicast modes */
1075 rctl
= IXGB_READ_REG(hw
, RCTL
);
1077 if(netdev
->flags
& IFF_PROMISC
) {
1078 rctl
|= (IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1079 } else if(netdev
->flags
& IFF_ALLMULTI
) {
1080 rctl
|= IXGB_RCTL_MPE
;
1081 rctl
&= ~IXGB_RCTL_UPE
;
1083 rctl
&= ~(IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1086 if(netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
) {
1087 rctl
|= IXGB_RCTL_MPE
;
1088 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1090 uint8_t mta
[netdev
->mc_count
* IXGB_ETH_LENGTH_OF_ADDRESS
];
1092 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1094 for(i
= 0, mc_ptr
= netdev
->mc_list
; mc_ptr
;
1095 i
++, mc_ptr
= mc_ptr
->next
)
1096 memcpy(&mta
[i
* IXGB_ETH_LENGTH_OF_ADDRESS
],
1097 mc_ptr
->dmi_addr
, IXGB_ETH_LENGTH_OF_ADDRESS
);
1099 ixgb_mc_addr_list_update(hw
, mta
, netdev
->mc_count
, 0);
1104 * ixgb_watchdog - Timer Call-back
1105 * @data: pointer to netdev cast into an unsigned long
1109 ixgb_watchdog(unsigned long data
)
1111 struct ixgb_adapter
*adapter
= (struct ixgb_adapter
*)data
;
1112 struct net_device
*netdev
= adapter
->netdev
;
1113 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
1115 ixgb_check_for_link(&adapter
->hw
);
1117 if (ixgb_check_for_bad_link(&adapter
->hw
)) {
1118 /* force the reset path */
1119 netif_stop_queue(netdev
);
1122 if(adapter
->hw
.link_up
) {
1123 if(!netif_carrier_ok(netdev
)) {
1125 "NIC Link is Up 10000 Mbps Full Duplex\n");
1126 adapter
->link_speed
= 10000;
1127 adapter
->link_duplex
= FULL_DUPLEX
;
1128 netif_carrier_on(netdev
);
1129 netif_wake_queue(netdev
);
1132 if(netif_carrier_ok(netdev
)) {
1133 adapter
->link_speed
= 0;
1134 adapter
->link_duplex
= 0;
1135 DPRINTK(LINK
, INFO
, "NIC Link is Down\n");
1136 netif_carrier_off(netdev
);
1137 netif_stop_queue(netdev
);
1142 ixgb_update_stats(adapter
);
1144 if(!netif_carrier_ok(netdev
)) {
1145 if(IXGB_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
1146 /* We've lost link, so the controller stops DMA,
1147 * but we've got queued Tx work that's never going
1148 * to get done, so reset controller to flush Tx.
1149 * (Do the reset outside of interrupt context). */
1150 schedule_work(&adapter
->tx_timeout_task
);
1154 /* Force detection of hung controller every watchdog period */
1155 adapter
->detect_tx_hung
= TRUE
;
1157 /* generate an interrupt to force clean up of any stragglers */
1158 IXGB_WRITE_REG(&adapter
->hw
, ICS
, IXGB_INT_TXDW
);
1160 /* Reset the timer */
1161 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 2 * HZ
);
1164 #define IXGB_TX_FLAGS_CSUM 0x00000001
1165 #define IXGB_TX_FLAGS_VLAN 0x00000002
1166 #define IXGB_TX_FLAGS_TSO 0x00000004
1169 ixgb_tso(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1171 struct ixgb_context_desc
*context_desc
;
1173 uint8_t ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
1174 uint16_t ipcse
, tucse
, mss
;
1177 if (likely(skb_is_gso(skb
))) {
1178 struct ixgb_buffer
*buffer_info
;
1181 if (skb_header_cloned(skb
)) {
1182 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
1187 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
1188 mss
= skb_shinfo(skb
)->gso_size
;
1192 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
1195 ipcss
= skb_network_offset(skb
);
1196 ipcso
= (void *)&(iph
->check
) - (void *)skb
->data
;
1197 ipcse
= skb_transport_offset(skb
) - 1;
1198 tucss
= skb_transport_offset(skb
);
1199 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
1202 i
= adapter
->tx_ring
.next_to_use
;
1203 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1204 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1205 WARN_ON(buffer_info
->dma
!= 0);
1207 context_desc
->ipcss
= ipcss
;
1208 context_desc
->ipcso
= ipcso
;
1209 context_desc
->ipcse
= cpu_to_le16(ipcse
);
1210 context_desc
->tucss
= tucss
;
1211 context_desc
->tucso
= tucso
;
1212 context_desc
->tucse
= cpu_to_le16(tucse
);
1213 context_desc
->mss
= cpu_to_le16(mss
);
1214 context_desc
->hdr_len
= hdr_len
;
1215 context_desc
->status
= 0;
1216 context_desc
->cmd_type_len
= cpu_to_le32(
1217 IXGB_CONTEXT_DESC_TYPE
1218 | IXGB_CONTEXT_DESC_CMD_TSE
1219 | IXGB_CONTEXT_DESC_CMD_IP
1220 | IXGB_CONTEXT_DESC_CMD_TCP
1221 | IXGB_CONTEXT_DESC_CMD_IDE
1222 | (skb
->len
- (hdr_len
)));
1225 if(++i
== adapter
->tx_ring
.count
) i
= 0;
1226 adapter
->tx_ring
.next_to_use
= i
;
1235 ixgb_tx_csum(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1237 struct ixgb_context_desc
*context_desc
;
1241 if(likely(skb
->ip_summed
== CHECKSUM_PARTIAL
)) {
1242 struct ixgb_buffer
*buffer_info
;
1243 css
= skb_transport_offset(skb
);
1244 cso
= css
+ skb
->csum_offset
;
1246 i
= adapter
->tx_ring
.next_to_use
;
1247 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1248 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1249 WARN_ON(buffer_info
->dma
!= 0);
1251 context_desc
->tucss
= css
;
1252 context_desc
->tucso
= cso
;
1253 context_desc
->tucse
= 0;
1254 /* zero out any previously existing data in one instruction */
1255 *(uint32_t *)&(context_desc
->ipcss
) = 0;
1256 context_desc
->status
= 0;
1257 context_desc
->hdr_len
= 0;
1258 context_desc
->mss
= 0;
1259 context_desc
->cmd_type_len
=
1260 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1261 | IXGB_TX_DESC_CMD_IDE
);
1263 if(++i
== adapter
->tx_ring
.count
) i
= 0;
1264 adapter
->tx_ring
.next_to_use
= i
;
1272 #define IXGB_MAX_TXD_PWR 14
1273 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1276 ixgb_tx_map(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
,
1279 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1280 struct ixgb_buffer
*buffer_info
;
1282 unsigned int offset
= 0, size
, count
= 0, i
;
1283 unsigned int mss
= skb_shinfo(skb
)->gso_size
;
1285 unsigned int nr_frags
= skb_shinfo(skb
)->nr_frags
;
1288 len
-= skb
->data_len
;
1290 i
= tx_ring
->next_to_use
;
1293 buffer_info
= &tx_ring
->buffer_info
[i
];
1294 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1295 /* Workaround for premature desc write-backs
1296 * in TSO mode. Append 4-byte sentinel desc */
1297 if (unlikely(mss
&& !nr_frags
&& size
== len
&& size
> 8))
1300 buffer_info
->length
= size
;
1301 WARN_ON(buffer_info
->dma
!= 0);
1303 pci_map_single(adapter
->pdev
,
1307 buffer_info
->time_stamp
= jiffies
;
1308 buffer_info
->next_to_watch
= 0;
1313 if(++i
== tx_ring
->count
) i
= 0;
1316 for(f
= 0; f
< nr_frags
; f
++) {
1317 struct skb_frag_struct
*frag
;
1319 frag
= &skb_shinfo(skb
)->frags
[f
];
1324 buffer_info
= &tx_ring
->buffer_info
[i
];
1325 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1327 /* Workaround for premature desc write-backs
1328 * in TSO mode. Append 4-byte sentinel desc */
1329 if (unlikely(mss
&& !nr_frags
&& size
== len
1333 buffer_info
->length
= size
;
1335 pci_map_page(adapter
->pdev
,
1337 frag
->page_offset
+ offset
,
1340 buffer_info
->time_stamp
= jiffies
;
1341 buffer_info
->next_to_watch
= 0;
1346 if(++i
== tx_ring
->count
) i
= 0;
1349 i
= (i
== 0) ? tx_ring
->count
- 1 : i
- 1;
1350 tx_ring
->buffer_info
[i
].skb
= skb
;
1351 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
1357 ixgb_tx_queue(struct ixgb_adapter
*adapter
, int count
, int vlan_id
,int tx_flags
)
1359 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1360 struct ixgb_tx_desc
*tx_desc
= NULL
;
1361 struct ixgb_buffer
*buffer_info
;
1362 uint32_t cmd_type_len
= adapter
->tx_cmd_type
;
1367 if(tx_flags
& IXGB_TX_FLAGS_TSO
) {
1368 cmd_type_len
|= IXGB_TX_DESC_CMD_TSE
;
1369 popts
|= (IXGB_TX_DESC_POPTS_IXSM
| IXGB_TX_DESC_POPTS_TXSM
);
1372 if(tx_flags
& IXGB_TX_FLAGS_CSUM
)
1373 popts
|= IXGB_TX_DESC_POPTS_TXSM
;
1375 if(tx_flags
& IXGB_TX_FLAGS_VLAN
) {
1376 cmd_type_len
|= IXGB_TX_DESC_CMD_VLE
;
1379 i
= tx_ring
->next_to_use
;
1382 buffer_info
= &tx_ring
->buffer_info
[i
];
1383 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1384 tx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
1385 tx_desc
->cmd_type_len
=
1386 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
1387 tx_desc
->status
= status
;
1388 tx_desc
->popts
= popts
;
1389 tx_desc
->vlan
= cpu_to_le16(vlan_id
);
1391 if(++i
== tx_ring
->count
) i
= 0;
1394 tx_desc
->cmd_type_len
|= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1395 | IXGB_TX_DESC_CMD_RS
);
1397 /* Force memory writes to complete before letting h/w
1398 * know there are new descriptors to fetch. (Only
1399 * applicable for weak-ordered memory model archs,
1400 * such as IA-64). */
1403 tx_ring
->next_to_use
= i
;
1404 IXGB_WRITE_REG(&adapter
->hw
, TDT
, i
);
1407 static int __ixgb_maybe_stop_tx(struct net_device
*netdev
, int size
)
1409 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1410 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1412 netif_stop_queue(netdev
);
1413 /* Herbert's original patch had:
1414 * smp_mb__after_netif_stop_queue();
1415 * but since that doesn't exist yet, just open code it. */
1418 /* We need to check again in a case another CPU has just
1419 * made room available. */
1420 if (likely(IXGB_DESC_UNUSED(tx_ring
) < size
))
1424 netif_start_queue(netdev
);
1425 ++adapter
->restart_queue
;
1429 static int ixgb_maybe_stop_tx(struct net_device
*netdev
,
1430 struct ixgb_desc_ring
*tx_ring
, int size
)
1432 if (likely(IXGB_DESC_UNUSED(tx_ring
) >= size
))
1434 return __ixgb_maybe_stop_tx(netdev
, size
);
1438 /* Tx Descriptors needed, worst case */
1439 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1440 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1441 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1442 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1443 + 1 /* one more needed for sentinel TSO workaround */
1446 ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
1448 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1450 unsigned int tx_flags
= 0;
1451 unsigned long flags
;
1456 dev_kfree_skb_any(skb
);
1461 local_irq_save(flags
);
1462 if (!spin_trylock(&adapter
->tx_lock
)) {
1463 /* Collision - tell upper layer to requeue */
1464 local_irq_restore(flags
);
1465 return NETDEV_TX_LOCKED
;
1468 spin_lock_irqsave(&adapter
->tx_lock
, flags
);
1471 if (unlikely(ixgb_maybe_stop_tx(netdev
, &adapter
->tx_ring
,
1473 netif_stop_queue(netdev
);
1474 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1475 return NETDEV_TX_BUSY
;
1478 #ifndef NETIF_F_LLTX
1479 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1482 if(adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
1483 tx_flags
|= IXGB_TX_FLAGS_VLAN
;
1484 vlan_id
= vlan_tx_tag_get(skb
);
1487 first
= adapter
->tx_ring
.next_to_use
;
1489 tso
= ixgb_tso(adapter
, skb
);
1491 dev_kfree_skb_any(skb
);
1493 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1495 return NETDEV_TX_OK
;
1499 tx_flags
|= IXGB_TX_FLAGS_TSO
;
1500 else if(ixgb_tx_csum(adapter
, skb
))
1501 tx_flags
|= IXGB_TX_FLAGS_CSUM
;
1503 ixgb_tx_queue(adapter
, ixgb_tx_map(adapter
, skb
, first
), vlan_id
,
1506 netdev
->trans_start
= jiffies
;
1509 /* Make sure there is space in the ring for the next send. */
1510 ixgb_maybe_stop_tx(netdev
, &adapter
->tx_ring
, DESC_NEEDED
);
1512 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1515 return NETDEV_TX_OK
;
1519 * ixgb_tx_timeout - Respond to a Tx Hang
1520 * @netdev: network interface device structure
1524 ixgb_tx_timeout(struct net_device
*netdev
)
1526 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1528 /* Do the reset outside of interrupt context */
1529 schedule_work(&adapter
->tx_timeout_task
);
1533 ixgb_tx_timeout_task(struct work_struct
*work
)
1535 struct ixgb_adapter
*adapter
=
1536 container_of(work
, struct ixgb_adapter
, tx_timeout_task
);
1538 adapter
->tx_timeout_count
++;
1539 ixgb_down(adapter
, TRUE
);
1544 * ixgb_get_stats - Get System Network Statistics
1545 * @netdev: network interface device structure
1547 * Returns the address of the device statistics structure.
1548 * The statistics are actually updated from the timer callback.
1551 static struct net_device_stats
*
1552 ixgb_get_stats(struct net_device
*netdev
)
1554 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1556 return &adapter
->net_stats
;
1560 * ixgb_change_mtu - Change the Maximum Transfer Unit
1561 * @netdev: network interface device structure
1562 * @new_mtu: new value for maximum frame size
1564 * Returns 0 on success, negative on failure
1568 ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
)
1570 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1571 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1572 int old_max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1575 if((max_frame
< IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
)
1576 || (max_frame
> IXGB_MAX_JUMBO_FRAME_SIZE
+ ENET_FCS_LENGTH
)) {
1577 DPRINTK(PROBE
, ERR
, "Invalid MTU setting %d\n", new_mtu
);
1581 adapter
->rx_buffer_len
= max_frame
;
1583 netdev
->mtu
= new_mtu
;
1585 if ((old_max_frame
!= max_frame
) && netif_running(netdev
)) {
1586 ixgb_down(adapter
, TRUE
);
1594 * ixgb_update_stats - Update the board statistics counters.
1595 * @adapter: board private structure
1599 ixgb_update_stats(struct ixgb_adapter
*adapter
)
1601 struct net_device
*netdev
= adapter
->netdev
;
1602 struct pci_dev
*pdev
= adapter
->pdev
;
1604 /* Prevent stats update while adapter is being reset */
1605 if (pci_channel_offline(pdev
))
1608 if((netdev
->flags
& IFF_PROMISC
) || (netdev
->flags
& IFF_ALLMULTI
) ||
1609 (netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
)) {
1610 u64 multi
= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1611 u32 bcast_l
= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1612 u32 bcast_h
= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1613 u64 bcast
= ((u64
)bcast_h
<< 32) | bcast_l
;
1615 multi
|= ((u64
)IXGB_READ_REG(&adapter
->hw
, MPRCH
) << 32);
1616 /* fix up multicast stats by removing broadcasts */
1620 adapter
->stats
.mprcl
+= (multi
& 0xFFFFFFFF);
1621 adapter
->stats
.mprch
+= (multi
>> 32);
1622 adapter
->stats
.bprcl
+= bcast_l
;
1623 adapter
->stats
.bprch
+= bcast_h
;
1625 adapter
->stats
.mprcl
+= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1626 adapter
->stats
.mprch
+= IXGB_READ_REG(&adapter
->hw
, MPRCH
);
1627 adapter
->stats
.bprcl
+= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1628 adapter
->stats
.bprch
+= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1630 adapter
->stats
.tprl
+= IXGB_READ_REG(&adapter
->hw
, TPRL
);
1631 adapter
->stats
.tprh
+= IXGB_READ_REG(&adapter
->hw
, TPRH
);
1632 adapter
->stats
.gprcl
+= IXGB_READ_REG(&adapter
->hw
, GPRCL
);
1633 adapter
->stats
.gprch
+= IXGB_READ_REG(&adapter
->hw
, GPRCH
);
1634 adapter
->stats
.uprcl
+= IXGB_READ_REG(&adapter
->hw
, UPRCL
);
1635 adapter
->stats
.uprch
+= IXGB_READ_REG(&adapter
->hw
, UPRCH
);
1636 adapter
->stats
.vprcl
+= IXGB_READ_REG(&adapter
->hw
, VPRCL
);
1637 adapter
->stats
.vprch
+= IXGB_READ_REG(&adapter
->hw
, VPRCH
);
1638 adapter
->stats
.jprcl
+= IXGB_READ_REG(&adapter
->hw
, JPRCL
);
1639 adapter
->stats
.jprch
+= IXGB_READ_REG(&adapter
->hw
, JPRCH
);
1640 adapter
->stats
.gorcl
+= IXGB_READ_REG(&adapter
->hw
, GORCL
);
1641 adapter
->stats
.gorch
+= IXGB_READ_REG(&adapter
->hw
, GORCH
);
1642 adapter
->stats
.torl
+= IXGB_READ_REG(&adapter
->hw
, TORL
);
1643 adapter
->stats
.torh
+= IXGB_READ_REG(&adapter
->hw
, TORH
);
1644 adapter
->stats
.rnbc
+= IXGB_READ_REG(&adapter
->hw
, RNBC
);
1645 adapter
->stats
.ruc
+= IXGB_READ_REG(&adapter
->hw
, RUC
);
1646 adapter
->stats
.roc
+= IXGB_READ_REG(&adapter
->hw
, ROC
);
1647 adapter
->stats
.rlec
+= IXGB_READ_REG(&adapter
->hw
, RLEC
);
1648 adapter
->stats
.crcerrs
+= IXGB_READ_REG(&adapter
->hw
, CRCERRS
);
1649 adapter
->stats
.icbc
+= IXGB_READ_REG(&adapter
->hw
, ICBC
);
1650 adapter
->stats
.ecbc
+= IXGB_READ_REG(&adapter
->hw
, ECBC
);
1651 adapter
->stats
.mpc
+= IXGB_READ_REG(&adapter
->hw
, MPC
);
1652 adapter
->stats
.tptl
+= IXGB_READ_REG(&adapter
->hw
, TPTL
);
1653 adapter
->stats
.tpth
+= IXGB_READ_REG(&adapter
->hw
, TPTH
);
1654 adapter
->stats
.gptcl
+= IXGB_READ_REG(&adapter
->hw
, GPTCL
);
1655 adapter
->stats
.gptch
+= IXGB_READ_REG(&adapter
->hw
, GPTCH
);
1656 adapter
->stats
.bptcl
+= IXGB_READ_REG(&adapter
->hw
, BPTCL
);
1657 adapter
->stats
.bptch
+= IXGB_READ_REG(&adapter
->hw
, BPTCH
);
1658 adapter
->stats
.mptcl
+= IXGB_READ_REG(&adapter
->hw
, MPTCL
);
1659 adapter
->stats
.mptch
+= IXGB_READ_REG(&adapter
->hw
, MPTCH
);
1660 adapter
->stats
.uptcl
+= IXGB_READ_REG(&adapter
->hw
, UPTCL
);
1661 adapter
->stats
.uptch
+= IXGB_READ_REG(&adapter
->hw
, UPTCH
);
1662 adapter
->stats
.vptcl
+= IXGB_READ_REG(&adapter
->hw
, VPTCL
);
1663 adapter
->stats
.vptch
+= IXGB_READ_REG(&adapter
->hw
, VPTCH
);
1664 adapter
->stats
.jptcl
+= IXGB_READ_REG(&adapter
->hw
, JPTCL
);
1665 adapter
->stats
.jptch
+= IXGB_READ_REG(&adapter
->hw
, JPTCH
);
1666 adapter
->stats
.gotcl
+= IXGB_READ_REG(&adapter
->hw
, GOTCL
);
1667 adapter
->stats
.gotch
+= IXGB_READ_REG(&adapter
->hw
, GOTCH
);
1668 adapter
->stats
.totl
+= IXGB_READ_REG(&adapter
->hw
, TOTL
);
1669 adapter
->stats
.toth
+= IXGB_READ_REG(&adapter
->hw
, TOTH
);
1670 adapter
->stats
.dc
+= IXGB_READ_REG(&adapter
->hw
, DC
);
1671 adapter
->stats
.plt64c
+= IXGB_READ_REG(&adapter
->hw
, PLT64C
);
1672 adapter
->stats
.tsctc
+= IXGB_READ_REG(&adapter
->hw
, TSCTC
);
1673 adapter
->stats
.tsctfc
+= IXGB_READ_REG(&adapter
->hw
, TSCTFC
);
1674 adapter
->stats
.ibic
+= IXGB_READ_REG(&adapter
->hw
, IBIC
);
1675 adapter
->stats
.rfc
+= IXGB_READ_REG(&adapter
->hw
, RFC
);
1676 adapter
->stats
.lfc
+= IXGB_READ_REG(&adapter
->hw
, LFC
);
1677 adapter
->stats
.pfrc
+= IXGB_READ_REG(&adapter
->hw
, PFRC
);
1678 adapter
->stats
.pftc
+= IXGB_READ_REG(&adapter
->hw
, PFTC
);
1679 adapter
->stats
.mcfrc
+= IXGB_READ_REG(&adapter
->hw
, MCFRC
);
1680 adapter
->stats
.mcftc
+= IXGB_READ_REG(&adapter
->hw
, MCFTC
);
1681 adapter
->stats
.xonrxc
+= IXGB_READ_REG(&adapter
->hw
, XONRXC
);
1682 adapter
->stats
.xontxc
+= IXGB_READ_REG(&adapter
->hw
, XONTXC
);
1683 adapter
->stats
.xoffrxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFRXC
);
1684 adapter
->stats
.xofftxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFTXC
);
1685 adapter
->stats
.rjc
+= IXGB_READ_REG(&adapter
->hw
, RJC
);
1687 /* Fill out the OS statistics structure */
1689 adapter
->net_stats
.rx_packets
= adapter
->stats
.gprcl
;
1690 adapter
->net_stats
.tx_packets
= adapter
->stats
.gptcl
;
1691 adapter
->net_stats
.rx_bytes
= adapter
->stats
.gorcl
;
1692 adapter
->net_stats
.tx_bytes
= adapter
->stats
.gotcl
;
1693 adapter
->net_stats
.multicast
= adapter
->stats
.mprcl
;
1694 adapter
->net_stats
.collisions
= 0;
1696 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1697 * with a length in the type/len field */
1698 adapter
->net_stats
.rx_errors
=
1699 /* adapter->stats.rnbc + */ adapter
->stats
.crcerrs
+
1700 adapter
->stats
.ruc
+
1701 adapter
->stats
.roc
/*+ adapter->stats.rlec */ +
1702 adapter
->stats
.icbc
+
1703 adapter
->stats
.ecbc
+ adapter
->stats
.mpc
;
1706 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1709 adapter
->net_stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
1710 adapter
->net_stats
.rx_fifo_errors
= adapter
->stats
.mpc
;
1711 adapter
->net_stats
.rx_missed_errors
= adapter
->stats
.mpc
;
1712 adapter
->net_stats
.rx_over_errors
= adapter
->stats
.mpc
;
1714 adapter
->net_stats
.tx_errors
= 0;
1715 adapter
->net_stats
.rx_frame_errors
= 0;
1716 adapter
->net_stats
.tx_aborted_errors
= 0;
1717 adapter
->net_stats
.tx_carrier_errors
= 0;
1718 adapter
->net_stats
.tx_fifo_errors
= 0;
1719 adapter
->net_stats
.tx_heartbeat_errors
= 0;
1720 adapter
->net_stats
.tx_window_errors
= 0;
1723 #define IXGB_MAX_INTR 10
1725 * ixgb_intr - Interrupt Handler
1726 * @irq: interrupt number
1727 * @data: pointer to a network interface device structure
1731 ixgb_intr(int irq
, void *data
)
1733 struct net_device
*netdev
= data
;
1734 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1735 struct ixgb_hw
*hw
= &adapter
->hw
;
1736 uint32_t icr
= IXGB_READ_REG(hw
, ICR
);
1737 #ifndef CONFIG_IXGB_NAPI
1742 return IRQ_NONE
; /* Not our interrupt */
1744 if(unlikely(icr
& (IXGB_INT_RXSEQ
| IXGB_INT_LSC
))) {
1745 mod_timer(&adapter
->watchdog_timer
, jiffies
);
1748 #ifdef CONFIG_IXGB_NAPI
1749 if(netif_rx_schedule_prep(netdev
)) {
1751 /* Disable interrupts and register for poll. The flush
1752 of the posted write is intentionally left out.
1755 atomic_inc(&adapter
->irq_sem
);
1756 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
1757 __netif_rx_schedule(netdev
);
1760 /* yes, that is actually a & and it is meant to make sure that
1761 * every pass through this for loop checks both receive and
1762 * transmit queues for completed descriptors, intended to
1763 * avoid starvation issues and assist tx/rx fairness. */
1764 for(i
= 0; i
< IXGB_MAX_INTR
; i
++)
1765 if(!ixgb_clean_rx_irq(adapter
) &
1766 !ixgb_clean_tx_irq(adapter
))
1772 #ifdef CONFIG_IXGB_NAPI
1774 * ixgb_clean - NAPI Rx polling callback
1775 * @adapter: board private structure
1779 ixgb_clean(struct net_device
*netdev
, int *budget
)
1781 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1782 int work_to_do
= min(*budget
, netdev
->quota
);
1786 tx_cleaned
= ixgb_clean_tx_irq(adapter
);
1787 ixgb_clean_rx_irq(adapter
, &work_done
, work_to_do
);
1789 *budget
-= work_done
;
1790 netdev
->quota
-= work_done
;
1792 /* if no Tx and not enough Rx work done, exit the polling mode */
1793 if((!tx_cleaned
&& (work_done
== 0)) || !netif_running(netdev
)) {
1794 netif_rx_complete(netdev
);
1795 ixgb_irq_enable(adapter
);
1804 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1805 * @adapter: board private structure
1809 ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
)
1811 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1812 struct net_device
*netdev
= adapter
->netdev
;
1813 struct ixgb_tx_desc
*tx_desc
, *eop_desc
;
1814 struct ixgb_buffer
*buffer_info
;
1815 unsigned int i
, eop
;
1816 boolean_t cleaned
= FALSE
;
1818 i
= tx_ring
->next_to_clean
;
1819 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1820 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1822 while(eop_desc
->status
& IXGB_TX_DESC_STATUS_DD
) {
1824 for(cleaned
= FALSE
; !cleaned
; ) {
1825 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1826 buffer_info
= &tx_ring
->buffer_info
[i
];
1829 & (IXGB_TX_DESC_POPTS_TXSM
|
1830 IXGB_TX_DESC_POPTS_IXSM
))
1831 adapter
->hw_csum_tx_good
++;
1833 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
1835 *(uint32_t *)&(tx_desc
->status
) = 0;
1837 cleaned
= (i
== eop
);
1838 if(++i
== tx_ring
->count
) i
= 0;
1841 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1842 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1845 tx_ring
->next_to_clean
= i
;
1847 if (unlikely(netif_queue_stopped(netdev
))) {
1848 spin_lock(&adapter
->tx_lock
);
1849 if (netif_queue_stopped(netdev
) && netif_carrier_ok(netdev
) &&
1850 (IXGB_DESC_UNUSED(tx_ring
) >= DESC_NEEDED
))
1851 netif_wake_queue(netdev
);
1852 spin_unlock(&adapter
->tx_lock
);
1855 if(adapter
->detect_tx_hung
) {
1856 /* detect a transmit hang in hardware, this serializes the
1857 * check with the clearing of time_stamp and movement of i */
1858 adapter
->detect_tx_hung
= FALSE
;
1859 if (tx_ring
->buffer_info
[eop
].dma
&&
1860 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+ HZ
)
1861 && !(IXGB_READ_REG(&adapter
->hw
, STATUS
) &
1862 IXGB_STATUS_TXOFF
)) {
1863 /* detected Tx unit hang */
1864 DPRINTK(DRV
, ERR
, "Detected Tx Unit Hang\n"
1867 " next_to_use <%x>\n"
1868 " next_to_clean <%x>\n"
1869 "buffer_info[next_to_clean]\n"
1870 " time_stamp <%lx>\n"
1871 " next_to_watch <%x>\n"
1873 " next_to_watch.status <%x>\n",
1874 IXGB_READ_REG(&adapter
->hw
, TDH
),
1875 IXGB_READ_REG(&adapter
->hw
, TDT
),
1876 tx_ring
->next_to_use
,
1877 tx_ring
->next_to_clean
,
1878 tx_ring
->buffer_info
[eop
].time_stamp
,
1882 netif_stop_queue(netdev
);
1890 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1891 * @adapter: board private structure
1892 * @rx_desc: receive descriptor
1893 * @sk_buff: socket buffer with received data
1897 ixgb_rx_checksum(struct ixgb_adapter
*adapter
,
1898 struct ixgb_rx_desc
*rx_desc
,
1899 struct sk_buff
*skb
)
1901 /* Ignore Checksum bit is set OR
1902 * TCP Checksum has not been calculated
1904 if((rx_desc
->status
& IXGB_RX_DESC_STATUS_IXSM
) ||
1905 (!(rx_desc
->status
& IXGB_RX_DESC_STATUS_TCPCS
))) {
1906 skb
->ip_summed
= CHECKSUM_NONE
;
1910 /* At this point we know the hardware did the TCP checksum */
1911 /* now look at the TCP checksum error bit */
1912 if(rx_desc
->errors
& IXGB_RX_DESC_ERRORS_TCPE
) {
1913 /* let the stack verify checksum errors */
1914 skb
->ip_summed
= CHECKSUM_NONE
;
1915 adapter
->hw_csum_rx_error
++;
1917 /* TCP checksum is good */
1918 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1919 adapter
->hw_csum_rx_good
++;
1924 * ixgb_clean_rx_irq - Send received data up the network stack,
1925 * @adapter: board private structure
1929 #ifdef CONFIG_IXGB_NAPI
1930 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
, int *work_done
, int work_to_do
)
1932 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
)
1935 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1936 struct net_device
*netdev
= adapter
->netdev
;
1937 struct pci_dev
*pdev
= adapter
->pdev
;
1938 struct ixgb_rx_desc
*rx_desc
, *next_rxd
;
1939 struct ixgb_buffer
*buffer_info
, *next_buffer
, *next2_buffer
;
1942 boolean_t cleaned
= FALSE
;
1944 i
= rx_ring
->next_to_clean
;
1945 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
1946 buffer_info
= &rx_ring
->buffer_info
[i
];
1948 while(rx_desc
->status
& IXGB_RX_DESC_STATUS_DD
) {
1949 struct sk_buff
*skb
, *next_skb
;
1952 #ifdef CONFIG_IXGB_NAPI
1953 if(*work_done
>= work_to_do
)
1958 status
= rx_desc
->status
;
1959 skb
= buffer_info
->skb
;
1960 buffer_info
->skb
= NULL
;
1962 prefetch(skb
->data
);
1964 if(++i
== rx_ring
->count
) i
= 0;
1965 next_rxd
= IXGB_RX_DESC(*rx_ring
, i
);
1968 if((j
= i
+ 1) == rx_ring
->count
) j
= 0;
1969 next2_buffer
= &rx_ring
->buffer_info
[j
];
1970 prefetch(next2_buffer
);
1972 next_buffer
= &rx_ring
->buffer_info
[i
];
1973 next_skb
= next_buffer
->skb
;
1978 pci_unmap_single(pdev
,
1980 buffer_info
->length
,
1981 PCI_DMA_FROMDEVICE
);
1983 length
= le16_to_cpu(rx_desc
->length
);
1985 if(unlikely(!(status
& IXGB_RX_DESC_STATUS_EOP
))) {
1987 /* All receives must fit into a single buffer */
1989 IXGB_DBG("Receive packet consumed multiple buffers "
1990 "length<%x>\n", length
);
1992 dev_kfree_skb_irq(skb
);
1996 if (unlikely(rx_desc
->errors
1997 & (IXGB_RX_DESC_ERRORS_CE
| IXGB_RX_DESC_ERRORS_SE
1998 | IXGB_RX_DESC_ERRORS_P
|
1999 IXGB_RX_DESC_ERRORS_RXE
))) {
2001 dev_kfree_skb_irq(skb
);
2005 /* code added for copybreak, this should improve
2006 * performance for small packets with large amounts
2007 * of reassembly being done in the stack */
2008 #define IXGB_CB_LENGTH 256
2009 if (length
< IXGB_CB_LENGTH
) {
2010 struct sk_buff
*new_skb
=
2011 netdev_alloc_skb(netdev
, length
+ NET_IP_ALIGN
);
2013 skb_reserve(new_skb
, NET_IP_ALIGN
);
2014 skb_copy_to_linear_data_offset(new_skb
,
2020 /* save the skb in buffer_info as good */
2021 buffer_info
->skb
= skb
;
2025 /* end copybreak code */
2028 skb_put(skb
, length
);
2030 /* Receive Checksum Offload */
2031 ixgb_rx_checksum(adapter
, rx_desc
, skb
);
2033 skb
->protocol
= eth_type_trans(skb
, netdev
);
2034 #ifdef CONFIG_IXGB_NAPI
2035 if(adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
2036 vlan_hwaccel_receive_skb(skb
, adapter
->vlgrp
,
2037 le16_to_cpu(rx_desc
->special
) &
2038 IXGB_RX_DESC_SPECIAL_VLAN_MASK
);
2040 netif_receive_skb(skb
);
2042 #else /* CONFIG_IXGB_NAPI */
2043 if(adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
2044 vlan_hwaccel_rx(skb
, adapter
->vlgrp
,
2045 le16_to_cpu(rx_desc
->special
) &
2046 IXGB_RX_DESC_SPECIAL_VLAN_MASK
);
2050 #endif /* CONFIG_IXGB_NAPI */
2051 netdev
->last_rx
= jiffies
;
2054 /* clean up descriptor, might be written over by hw */
2055 rx_desc
->status
= 0;
2057 /* use prefetched values */
2059 buffer_info
= next_buffer
;
2062 rx_ring
->next_to_clean
= i
;
2064 ixgb_alloc_rx_buffers(adapter
);
2070 * ixgb_alloc_rx_buffers - Replace used receive buffers
2071 * @adapter: address of board private structure
2075 ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
)
2077 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
2078 struct net_device
*netdev
= adapter
->netdev
;
2079 struct pci_dev
*pdev
= adapter
->pdev
;
2080 struct ixgb_rx_desc
*rx_desc
;
2081 struct ixgb_buffer
*buffer_info
;
2082 struct sk_buff
*skb
;
2084 int num_group_tail_writes
;
2087 i
= rx_ring
->next_to_use
;
2088 buffer_info
= &rx_ring
->buffer_info
[i
];
2089 cleancount
= IXGB_DESC_UNUSED(rx_ring
);
2091 num_group_tail_writes
= IXGB_RX_BUFFER_WRITE
;
2093 /* leave three descriptors unused */
2094 while(--cleancount
> 2) {
2095 /* recycle! its good for you */
2096 skb
= buffer_info
->skb
;
2102 skb
= netdev_alloc_skb(netdev
, adapter
->rx_buffer_len
2104 if (unlikely(!skb
)) {
2105 /* Better luck next round */
2106 adapter
->alloc_rx_buff_failed
++;
2110 /* Make buffer alignment 2 beyond a 16 byte boundary
2111 * this will result in a 16 byte aligned IP header after
2112 * the 14 byte MAC header is removed
2114 skb_reserve(skb
, NET_IP_ALIGN
);
2116 buffer_info
->skb
= skb
;
2117 buffer_info
->length
= adapter
->rx_buffer_len
;
2119 buffer_info
->dma
= pci_map_single(pdev
,
2121 adapter
->rx_buffer_len
,
2122 PCI_DMA_FROMDEVICE
);
2124 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
2125 rx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
2126 /* guarantee DD bit not set now before h/w gets descriptor
2127 * this is the rest of the workaround for h/w double
2129 rx_desc
->status
= 0;
2132 if(++i
== rx_ring
->count
) i
= 0;
2133 buffer_info
= &rx_ring
->buffer_info
[i
];
2136 if (likely(rx_ring
->next_to_use
!= i
)) {
2137 rx_ring
->next_to_use
= i
;
2138 if (unlikely(i
-- == 0))
2139 i
= (rx_ring
->count
- 1);
2141 /* Force memory writes to complete before letting h/w
2142 * know there are new descriptors to fetch. (Only
2143 * applicable for weak-ordered memory model archs, such
2146 IXGB_WRITE_REG(&adapter
->hw
, RDT
, i
);
2151 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2153 * @param netdev network interface device structure
2154 * @param grp indicates to enable or disable tagging/stripping
2157 ixgb_vlan_rx_register(struct net_device
*netdev
, struct vlan_group
*grp
)
2159 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2160 uint32_t ctrl
, rctl
;
2162 ixgb_irq_disable(adapter
);
2163 adapter
->vlgrp
= grp
;
2166 /* enable VLAN tag insert/strip */
2167 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2168 ctrl
|= IXGB_CTRL0_VME
;
2169 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2171 /* enable VLAN receive filtering */
2173 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2174 rctl
|= IXGB_RCTL_VFE
;
2175 rctl
&= ~IXGB_RCTL_CFIEN
;
2176 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2178 /* disable VLAN tag insert/strip */
2180 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2181 ctrl
&= ~IXGB_CTRL0_VME
;
2182 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2184 /* disable VLAN filtering */
2186 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2187 rctl
&= ~IXGB_RCTL_VFE
;
2188 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2191 ixgb_irq_enable(adapter
);
2195 ixgb_vlan_rx_add_vid(struct net_device
*netdev
, uint16_t vid
)
2197 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2198 uint32_t vfta
, index
;
2200 /* add VID to filter table */
2202 index
= (vid
>> 5) & 0x7F;
2203 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2204 vfta
|= (1 << (vid
& 0x1F));
2205 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2209 ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, uint16_t vid
)
2211 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2212 uint32_t vfta
, index
;
2214 ixgb_irq_disable(adapter
);
2216 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
2218 ixgb_irq_enable(adapter
);
2220 /* remove VID from filter table*/
2222 index
= (vid
>> 5) & 0x7F;
2223 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2224 vfta
&= ~(1 << (vid
& 0x1F));
2225 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2229 ixgb_restore_vlan(struct ixgb_adapter
*adapter
)
2231 ixgb_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
2233 if(adapter
->vlgrp
) {
2235 for(vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
2236 if(!vlan_group_get_device(adapter
->vlgrp
, vid
))
2238 ixgb_vlan_rx_add_vid(adapter
->netdev
, vid
);
2243 #ifdef CONFIG_NET_POLL_CONTROLLER
2245 * Polling 'interrupt' - used by things like netconsole to send skbs
2246 * without having to re-enable interrupts. It's not called while
2247 * the interrupt routine is executing.
2250 static void ixgb_netpoll(struct net_device
*dev
)
2252 struct ixgb_adapter
*adapter
= netdev_priv(dev
);
2254 disable_irq(adapter
->pdev
->irq
);
2255 ixgb_intr(adapter
->pdev
->irq
, dev
);
2256 enable_irq(adapter
->pdev
->irq
);
2261 * ixgb_io_error_detected() - called when PCI error is detected
2262 * @pdev pointer to pci device with error
2263 * @state pci channel state after error
2265 * This callback is called by the PCI subsystem whenever
2266 * a PCI bus error is detected.
2268 static pci_ers_result_t
ixgb_io_error_detected (struct pci_dev
*pdev
,
2269 enum pci_channel_state state
)
2271 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2272 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2274 if(netif_running(netdev
))
2275 ixgb_down(adapter
, TRUE
);
2277 pci_disable_device(pdev
);
2279 /* Request a slot reset. */
2280 return PCI_ERS_RESULT_NEED_RESET
;
2284 * ixgb_io_slot_reset - called after the pci bus has been reset.
2285 * @pdev pointer to pci device with error
2287 * This callback is called after the PCI buss has been reset.
2288 * Basically, this tries to restart the card from scratch.
2289 * This is a shortened version of the device probe/discovery code,
2290 * it resembles the first-half of the ixgb_probe() routine.
2292 static pci_ers_result_t
ixgb_io_slot_reset (struct pci_dev
*pdev
)
2294 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2295 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2297 if(pci_enable_device(pdev
)) {
2298 DPRINTK(PROBE
, ERR
, "Cannot re-enable PCI device after reset.\n");
2299 return PCI_ERS_RESULT_DISCONNECT
;
2302 /* Perform card reset only on one instance of the card */
2303 if (0 != PCI_FUNC (pdev
->devfn
))
2304 return PCI_ERS_RESULT_RECOVERED
;
2306 pci_set_master(pdev
);
2308 netif_carrier_off(netdev
);
2309 netif_stop_queue(netdev
);
2310 ixgb_reset(adapter
);
2312 /* Make sure the EEPROM is good */
2313 if(!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
2314 DPRINTK(PROBE
, ERR
, "After reset, the EEPROM checksum is not valid.\n");
2315 return PCI_ERS_RESULT_DISCONNECT
;
2317 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
2318 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
2320 if(!is_valid_ether_addr(netdev
->perm_addr
)) {
2321 DPRINTK(PROBE
, ERR
, "After reset, invalid MAC address.\n");
2322 return PCI_ERS_RESULT_DISCONNECT
;
2325 return PCI_ERS_RESULT_RECOVERED
;
2329 * ixgb_io_resume - called when its OK to resume normal operations
2330 * @pdev pointer to pci device with error
2332 * The error recovery driver tells us that its OK to resume
2333 * normal operation. Implementation resembles the second-half
2334 * of the ixgb_probe() routine.
2336 static void ixgb_io_resume (struct pci_dev
*pdev
)
2338 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2339 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2341 pci_set_master(pdev
);
2343 if(netif_running(netdev
)) {
2344 if(ixgb_up(adapter
)) {
2345 printk ("ixgb: can't bring device back up after reset\n");
2350 netif_device_attach(netdev
);
2351 mod_timer(&adapter
->watchdog_timer
, jiffies
);