1 /*******************************************************************************
3 Intel PRO/10GbE Linux driver
4 Copyright(c) 1999 - 2008 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 *******************************************************************************/
29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
33 char ixgb_driver_name
[] = "ixgb";
34 static char ixgb_driver_string
[] = "Intel(R) PRO/10GbE Network Driver";
36 #define DRIVERNAPI "-NAPI"
37 #define DRV_VERSION "1.0.135-k2" DRIVERNAPI
38 const char ixgb_driver_version
[] = DRV_VERSION
;
39 static const char ixgb_copyright
[] = "Copyright (c) 1999-2008 Intel Corporation.";
41 #define IXGB_CB_LENGTH 256
42 static unsigned int copybreak __read_mostly
= IXGB_CB_LENGTH
;
43 module_param(copybreak
, uint
, 0644);
44 MODULE_PARM_DESC(copybreak
,
45 "Maximum size of packet that is copied to a new buffer on receive");
47 /* ixgb_pci_tbl - PCI Device ID Table
49 * Wildcard entries (PCI_ANY_ID) should come last
50 * Last entry must be all 0s
52 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
53 * Class, Class Mask, private data (not used) }
55 static DEFINE_PCI_DEVICE_TABLE(ixgb_pci_tbl
) = {
56 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX
,
57 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
58 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_CX4
,
59 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
60 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_SR
,
61 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
62 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_LR
,
63 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
65 /* required last entry */
69 MODULE_DEVICE_TABLE(pci
, ixgb_pci_tbl
);
71 /* Local Function Prototypes */
72 static int ixgb_init_module(void);
73 static void ixgb_exit_module(void);
74 static int ixgb_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
75 static void __devexit
ixgb_remove(struct pci_dev
*pdev
);
76 static int ixgb_sw_init(struct ixgb_adapter
*adapter
);
77 static int ixgb_open(struct net_device
*netdev
);
78 static int ixgb_close(struct net_device
*netdev
);
79 static void ixgb_configure_tx(struct ixgb_adapter
*adapter
);
80 static void ixgb_configure_rx(struct ixgb_adapter
*adapter
);
81 static void ixgb_setup_rctl(struct ixgb_adapter
*adapter
);
82 static void ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
);
83 static void ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
);
84 static void ixgb_set_multi(struct net_device
*netdev
);
85 static void ixgb_watchdog(unsigned long data
);
86 static netdev_tx_t
ixgb_xmit_frame(struct sk_buff
*skb
,
87 struct net_device
*netdev
);
88 static struct net_device_stats
*ixgb_get_stats(struct net_device
*netdev
);
89 static int ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
);
90 static int ixgb_set_mac(struct net_device
*netdev
, void *p
);
91 static irqreturn_t
ixgb_intr(int irq
, void *data
);
92 static bool ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
);
94 static int ixgb_clean(struct napi_struct
*, int);
95 static bool ixgb_clean_rx_irq(struct ixgb_adapter
*, int *, int);
96 static void ixgb_alloc_rx_buffers(struct ixgb_adapter
*, int);
98 static void ixgb_tx_timeout(struct net_device
*dev
);
99 static void ixgb_tx_timeout_task(struct work_struct
*work
);
101 static void ixgb_vlan_rx_register(struct net_device
*netdev
,
102 struct vlan_group
*grp
);
103 static void ixgb_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
);
104 static void ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
);
105 static void ixgb_restore_vlan(struct ixgb_adapter
*adapter
);
107 #ifdef CONFIG_NET_POLL_CONTROLLER
108 /* for netdump / net console */
109 static void ixgb_netpoll(struct net_device
*dev
);
112 static pci_ers_result_t
ixgb_io_error_detected (struct pci_dev
*pdev
,
113 enum pci_channel_state state
);
114 static pci_ers_result_t
ixgb_io_slot_reset (struct pci_dev
*pdev
);
115 static void ixgb_io_resume (struct pci_dev
*pdev
);
117 static struct pci_error_handlers ixgb_err_handler
= {
118 .error_detected
= ixgb_io_error_detected
,
119 .slot_reset
= ixgb_io_slot_reset
,
120 .resume
= ixgb_io_resume
,
123 static struct pci_driver ixgb_driver
= {
124 .name
= ixgb_driver_name
,
125 .id_table
= ixgb_pci_tbl
,
127 .remove
= __devexit_p(ixgb_remove
),
128 .err_handler
= &ixgb_err_handler
131 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
132 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
133 MODULE_LICENSE("GPL");
134 MODULE_VERSION(DRV_VERSION
);
136 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
137 static int debug
= DEFAULT_DEBUG_LEVEL_SHIFT
;
138 module_param(debug
, int, 0);
139 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
142 * ixgb_init_module - Driver Registration Routine
144 * ixgb_init_module is the first routine called when the driver is
145 * loaded. All it does is register with the PCI subsystem.
149 ixgb_init_module(void)
151 pr_info("%s - version %s\n", ixgb_driver_string
, ixgb_driver_version
);
152 pr_info("%s\n", ixgb_copyright
);
154 return pci_register_driver(&ixgb_driver
);
157 module_init(ixgb_init_module
);
160 * ixgb_exit_module - Driver Exit Cleanup Routine
162 * ixgb_exit_module is called just before the driver is removed
167 ixgb_exit_module(void)
169 pci_unregister_driver(&ixgb_driver
);
172 module_exit(ixgb_exit_module
);
175 * ixgb_irq_disable - Mask off interrupt generation on the NIC
176 * @adapter: board private structure
180 ixgb_irq_disable(struct ixgb_adapter
*adapter
)
182 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
183 IXGB_WRITE_FLUSH(&adapter
->hw
);
184 synchronize_irq(adapter
->pdev
->irq
);
188 * ixgb_irq_enable - Enable default interrupt generation settings
189 * @adapter: board private structure
193 ixgb_irq_enable(struct ixgb_adapter
*adapter
)
195 u32 val
= IXGB_INT_RXT0
| IXGB_INT_RXDMT0
|
196 IXGB_INT_TXDW
| IXGB_INT_LSC
;
197 if (adapter
->hw
.subsystem_vendor_id
== SUN_SUBVENDOR_ID
)
198 val
|= IXGB_INT_GPI0
;
199 IXGB_WRITE_REG(&adapter
->hw
, IMS
, val
);
200 IXGB_WRITE_FLUSH(&adapter
->hw
);
204 ixgb_up(struct ixgb_adapter
*adapter
)
206 struct net_device
*netdev
= adapter
->netdev
;
207 int err
, irq_flags
= IRQF_SHARED
;
208 int max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
209 struct ixgb_hw
*hw
= &adapter
->hw
;
211 /* hardware has been reset, we need to reload some things */
213 ixgb_rar_set(hw
, netdev
->dev_addr
, 0);
214 ixgb_set_multi(netdev
);
216 ixgb_restore_vlan(adapter
);
218 ixgb_configure_tx(adapter
);
219 ixgb_setup_rctl(adapter
);
220 ixgb_configure_rx(adapter
);
221 ixgb_alloc_rx_buffers(adapter
, IXGB_DESC_UNUSED(&adapter
->rx_ring
));
223 /* disable interrupts and get the hardware into a known state */
224 IXGB_WRITE_REG(&adapter
->hw
, IMC
, 0xffffffff);
226 /* only enable MSI if bus is in PCI-X mode */
227 if (IXGB_READ_REG(&adapter
->hw
, STATUS
) & IXGB_STATUS_PCIX_MODE
) {
228 err
= pci_enable_msi(adapter
->pdev
);
230 adapter
->have_msi
= 1;
233 /* proceed to try to request regular interrupt */
236 err
= request_irq(adapter
->pdev
->irq
, ixgb_intr
, irq_flags
,
237 netdev
->name
, netdev
);
239 if (adapter
->have_msi
)
240 pci_disable_msi(adapter
->pdev
);
241 netif_err(adapter
, probe
, adapter
->netdev
,
242 "Unable to allocate interrupt Error: %d\n", err
);
246 if ((hw
->max_frame_size
!= max_frame
) ||
247 (hw
->max_frame_size
!=
248 (IXGB_READ_REG(hw
, MFS
) >> IXGB_MFS_SHIFT
))) {
250 hw
->max_frame_size
= max_frame
;
252 IXGB_WRITE_REG(hw
, MFS
, hw
->max_frame_size
<< IXGB_MFS_SHIFT
);
254 if (hw
->max_frame_size
>
255 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
) {
256 u32 ctrl0
= IXGB_READ_REG(hw
, CTRL0
);
258 if (!(ctrl0
& IXGB_CTRL0_JFE
)) {
259 ctrl0
|= IXGB_CTRL0_JFE
;
260 IXGB_WRITE_REG(hw
, CTRL0
, ctrl0
);
265 clear_bit(__IXGB_DOWN
, &adapter
->flags
);
267 napi_enable(&adapter
->napi
);
268 ixgb_irq_enable(adapter
);
270 netif_wake_queue(netdev
);
272 mod_timer(&adapter
->watchdog_timer
, jiffies
);
278 ixgb_down(struct ixgb_adapter
*adapter
, bool kill_watchdog
)
280 struct net_device
*netdev
= adapter
->netdev
;
282 /* prevent the interrupt handler from restarting watchdog */
283 set_bit(__IXGB_DOWN
, &adapter
->flags
);
285 napi_disable(&adapter
->napi
);
286 /* waiting for NAPI to complete can re-enable interrupts */
287 ixgb_irq_disable(adapter
);
288 free_irq(adapter
->pdev
->irq
, netdev
);
290 if (adapter
->have_msi
)
291 pci_disable_msi(adapter
->pdev
);
294 del_timer_sync(&adapter
->watchdog_timer
);
296 adapter
->link_speed
= 0;
297 adapter
->link_duplex
= 0;
298 netif_carrier_off(netdev
);
299 netif_stop_queue(netdev
);
302 ixgb_clean_tx_ring(adapter
);
303 ixgb_clean_rx_ring(adapter
);
307 ixgb_reset(struct ixgb_adapter
*adapter
)
309 struct ixgb_hw
*hw
= &adapter
->hw
;
311 ixgb_adapter_stop(hw
);
312 if (!ixgb_init_hw(hw
))
313 netif_err(adapter
, probe
, adapter
->netdev
, "ixgb_init_hw failed\n");
315 /* restore frame size information */
316 IXGB_WRITE_REG(hw
, MFS
, hw
->max_frame_size
<< IXGB_MFS_SHIFT
);
317 if (hw
->max_frame_size
>
318 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
) {
319 u32 ctrl0
= IXGB_READ_REG(hw
, CTRL0
);
320 if (!(ctrl0
& IXGB_CTRL0_JFE
)) {
321 ctrl0
|= IXGB_CTRL0_JFE
;
322 IXGB_WRITE_REG(hw
, CTRL0
, ctrl0
);
327 static const struct net_device_ops ixgb_netdev_ops
= {
328 .ndo_open
= ixgb_open
,
329 .ndo_stop
= ixgb_close
,
330 .ndo_start_xmit
= ixgb_xmit_frame
,
331 .ndo_get_stats
= ixgb_get_stats
,
332 .ndo_set_multicast_list
= ixgb_set_multi
,
333 .ndo_validate_addr
= eth_validate_addr
,
334 .ndo_set_mac_address
= ixgb_set_mac
,
335 .ndo_change_mtu
= ixgb_change_mtu
,
336 .ndo_tx_timeout
= ixgb_tx_timeout
,
337 .ndo_vlan_rx_register
= ixgb_vlan_rx_register
,
338 .ndo_vlan_rx_add_vid
= ixgb_vlan_rx_add_vid
,
339 .ndo_vlan_rx_kill_vid
= ixgb_vlan_rx_kill_vid
,
340 #ifdef CONFIG_NET_POLL_CONTROLLER
341 .ndo_poll_controller
= ixgb_netpoll
,
346 * ixgb_probe - Device Initialization Routine
347 * @pdev: PCI device information struct
348 * @ent: entry in ixgb_pci_tbl
350 * Returns 0 on success, negative on failure
352 * ixgb_probe initializes an adapter identified by a pci_dev structure.
353 * The OS initialization, configuring of the adapter private structure,
354 * and a hardware reset occur.
358 ixgb_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
360 struct net_device
*netdev
= NULL
;
361 struct ixgb_adapter
*adapter
;
362 static int cards_found
= 0;
367 err
= pci_enable_device(pdev
);
372 err
= dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(64));
374 err
= dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(64));
378 err
= dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(32));
380 err
= dma_set_coherent_mask(&pdev
->dev
,
383 pr_err("No usable DMA configuration, aborting\n");
389 err
= pci_request_regions(pdev
, ixgb_driver_name
);
391 goto err_request_regions
;
393 pci_set_master(pdev
);
395 netdev
= alloc_etherdev(sizeof(struct ixgb_adapter
));
398 goto err_alloc_etherdev
;
401 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
403 pci_set_drvdata(pdev
, netdev
);
404 adapter
= netdev_priv(netdev
);
405 adapter
->netdev
= netdev
;
406 adapter
->pdev
= pdev
;
407 adapter
->hw
.back
= adapter
;
408 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_DEBUG_LEVEL_SHIFT
);
410 adapter
->hw
.hw_addr
= pci_ioremap_bar(pdev
, BAR_0
);
411 if (!adapter
->hw
.hw_addr
) {
416 for (i
= BAR_1
; i
<= BAR_5
; i
++) {
417 if (pci_resource_len(pdev
, i
) == 0)
419 if (pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
420 adapter
->hw
.io_base
= pci_resource_start(pdev
, i
);
425 netdev
->netdev_ops
= &ixgb_netdev_ops
;
426 ixgb_set_ethtool_ops(netdev
);
427 netdev
->watchdog_timeo
= 5 * HZ
;
428 netif_napi_add(netdev
, &adapter
->napi
, ixgb_clean
, 64);
430 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
432 adapter
->bd_number
= cards_found
;
433 adapter
->link_speed
= 0;
434 adapter
->link_duplex
= 0;
436 /* setup the private structure */
438 err
= ixgb_sw_init(adapter
);
442 netdev
->features
= NETIF_F_SG
|
446 NETIF_F_HW_VLAN_FILTER
;
447 netdev
->features
|= NETIF_F_TSO
;
450 netdev
->features
|= NETIF_F_HIGHDMA
;
452 /* make sure the EEPROM is good */
454 if (!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
455 netif_err(adapter
, probe
, adapter
->netdev
,
456 "The EEPROM Checksum Is Not Valid\n");
461 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
462 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
464 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
465 netif_err(adapter
, probe
, adapter
->netdev
, "Invalid MAC Address\n");
470 adapter
->part_num
= ixgb_get_ee_pba_number(&adapter
->hw
);
472 init_timer(&adapter
->watchdog_timer
);
473 adapter
->watchdog_timer
.function
= &ixgb_watchdog
;
474 adapter
->watchdog_timer
.data
= (unsigned long)adapter
;
476 INIT_WORK(&adapter
->tx_timeout_task
, ixgb_tx_timeout_task
);
478 strcpy(netdev
->name
, "eth%d");
479 err
= register_netdev(netdev
);
483 /* carrier off reporting is important to ethtool even BEFORE open */
484 netif_carrier_off(netdev
);
486 netif_info(adapter
, probe
, adapter
->netdev
,
487 "Intel(R) PRO/10GbE Network Connection\n");
488 ixgb_check_options(adapter
);
489 /* reset the hardware with the new settings */
499 iounmap(adapter
->hw
.hw_addr
);
503 pci_release_regions(pdev
);
506 pci_disable_device(pdev
);
511 * ixgb_remove - Device Removal Routine
512 * @pdev: PCI device information struct
514 * ixgb_remove is called by the PCI subsystem to alert the driver
515 * that it should release a PCI device. The could be caused by a
516 * Hot-Plug event, or because the driver is going to be removed from
520 static void __devexit
521 ixgb_remove(struct pci_dev
*pdev
)
523 struct net_device
*netdev
= pci_get_drvdata(pdev
);
524 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
526 flush_scheduled_work();
528 unregister_netdev(netdev
);
530 iounmap(adapter
->hw
.hw_addr
);
531 pci_release_regions(pdev
);
537 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
538 * @adapter: board private structure to initialize
540 * ixgb_sw_init initializes the Adapter private data structure.
541 * Fields are initialized based on PCI device information and
542 * OS network device settings (MTU size).
546 ixgb_sw_init(struct ixgb_adapter
*adapter
)
548 struct ixgb_hw
*hw
= &adapter
->hw
;
549 struct net_device
*netdev
= adapter
->netdev
;
550 struct pci_dev
*pdev
= adapter
->pdev
;
552 /* PCI config space info */
554 hw
->vendor_id
= pdev
->vendor
;
555 hw
->device_id
= pdev
->device
;
556 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
557 hw
->subsystem_id
= pdev
->subsystem_device
;
559 hw
->max_frame_size
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
560 adapter
->rx_buffer_len
= hw
->max_frame_size
+ 8; /* + 8 for errata */
562 if ((hw
->device_id
== IXGB_DEVICE_ID_82597EX
) ||
563 (hw
->device_id
== IXGB_DEVICE_ID_82597EX_CX4
) ||
564 (hw
->device_id
== IXGB_DEVICE_ID_82597EX_LR
) ||
565 (hw
->device_id
== IXGB_DEVICE_ID_82597EX_SR
))
566 hw
->mac_type
= ixgb_82597
;
568 /* should never have loaded on this device */
569 netif_err(adapter
, probe
, adapter
->netdev
, "unsupported device id\n");
572 /* enable flow control to be programmed */
575 set_bit(__IXGB_DOWN
, &adapter
->flags
);
580 * ixgb_open - Called when a network interface is made active
581 * @netdev: network interface device structure
583 * Returns 0 on success, negative value on failure
585 * The open entry point is called when a network interface is made
586 * active by the system (IFF_UP). At this point all resources needed
587 * for transmit and receive operations are allocated, the interrupt
588 * handler is registered with the OS, the watchdog timer is started,
589 * and the stack is notified that the interface is ready.
593 ixgb_open(struct net_device
*netdev
)
595 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
598 /* allocate transmit descriptors */
599 err
= ixgb_setup_tx_resources(adapter
);
603 netif_carrier_off(netdev
);
605 /* allocate receive descriptors */
607 err
= ixgb_setup_rx_resources(adapter
);
611 err
= ixgb_up(adapter
);
615 netif_start_queue(netdev
);
620 ixgb_free_rx_resources(adapter
);
622 ixgb_free_tx_resources(adapter
);
630 * ixgb_close - Disables a network interface
631 * @netdev: network interface device structure
633 * Returns 0, this is not allowed to fail
635 * The close entry point is called when an interface is de-activated
636 * by the OS. The hardware is still under the drivers control, but
637 * needs to be disabled. A global MAC reset is issued to stop the
638 * hardware, and all transmit and receive resources are freed.
642 ixgb_close(struct net_device
*netdev
)
644 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
646 ixgb_down(adapter
, true);
648 ixgb_free_tx_resources(adapter
);
649 ixgb_free_rx_resources(adapter
);
655 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
656 * @adapter: board private structure
658 * Return 0 on success, negative on failure
662 ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
)
664 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
665 struct pci_dev
*pdev
= adapter
->pdev
;
668 size
= sizeof(struct ixgb_buffer
) * txdr
->count
;
669 txdr
->buffer_info
= vmalloc(size
);
670 if (!txdr
->buffer_info
) {
671 netif_err(adapter
, probe
, adapter
->netdev
,
672 "Unable to allocate transmit descriptor ring memory\n");
675 memset(txdr
->buffer_info
, 0, size
);
677 /* round up to nearest 4K */
679 txdr
->size
= txdr
->count
* sizeof(struct ixgb_tx_desc
);
680 txdr
->size
= ALIGN(txdr
->size
, 4096);
682 txdr
->desc
= dma_alloc_coherent(&pdev
->dev
, txdr
->size
, &txdr
->dma
,
685 vfree(txdr
->buffer_info
);
686 netif_err(adapter
, probe
, adapter
->netdev
,
687 "Unable to allocate transmit descriptor memory\n");
690 memset(txdr
->desc
, 0, txdr
->size
);
692 txdr
->next_to_use
= 0;
693 txdr
->next_to_clean
= 0;
699 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
700 * @adapter: board private structure
702 * Configure the Tx unit of the MAC after a reset.
706 ixgb_configure_tx(struct ixgb_adapter
*adapter
)
708 u64 tdba
= adapter
->tx_ring
.dma
;
709 u32 tdlen
= adapter
->tx_ring
.count
* sizeof(struct ixgb_tx_desc
);
711 struct ixgb_hw
*hw
= &adapter
->hw
;
713 /* Setup the Base and Length of the Tx Descriptor Ring
714 * tx_ring.dma can be either a 32 or 64 bit value
717 IXGB_WRITE_REG(hw
, TDBAL
, (tdba
& 0x00000000ffffffffULL
));
718 IXGB_WRITE_REG(hw
, TDBAH
, (tdba
>> 32));
720 IXGB_WRITE_REG(hw
, TDLEN
, tdlen
);
722 /* Setup the HW Tx Head and Tail descriptor pointers */
724 IXGB_WRITE_REG(hw
, TDH
, 0);
725 IXGB_WRITE_REG(hw
, TDT
, 0);
727 /* don't set up txdctl, it induces performance problems if configured
729 /* Set the Tx Interrupt Delay register */
731 IXGB_WRITE_REG(hw
, TIDV
, adapter
->tx_int_delay
);
733 /* Program the Transmit Control Register */
735 tctl
= IXGB_TCTL_TCE
| IXGB_TCTL_TXEN
| IXGB_TCTL_TPDE
;
736 IXGB_WRITE_REG(hw
, TCTL
, tctl
);
738 /* Setup Transmit Descriptor Settings for this adapter */
739 adapter
->tx_cmd_type
=
741 (adapter
->tx_int_delay_enable
? IXGB_TX_DESC_CMD_IDE
: 0);
745 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
746 * @adapter: board private structure
748 * Returns 0 on success, negative on failure
752 ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
)
754 struct ixgb_desc_ring
*rxdr
= &adapter
->rx_ring
;
755 struct pci_dev
*pdev
= adapter
->pdev
;
758 size
= sizeof(struct ixgb_buffer
) * rxdr
->count
;
759 rxdr
->buffer_info
= vmalloc(size
);
760 if (!rxdr
->buffer_info
) {
761 netif_err(adapter
, probe
, adapter
->netdev
,
762 "Unable to allocate receive descriptor ring\n");
765 memset(rxdr
->buffer_info
, 0, size
);
767 /* Round up to nearest 4K */
769 rxdr
->size
= rxdr
->count
* sizeof(struct ixgb_rx_desc
);
770 rxdr
->size
= ALIGN(rxdr
->size
, 4096);
772 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
, &rxdr
->dma
,
776 vfree(rxdr
->buffer_info
);
777 netif_err(adapter
, probe
, adapter
->netdev
,
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 u64 rdba
= adapter
->rx_ring
.dma
;
833 u32 rdlen
= adapter
->rx_ring
.count
* sizeof(struct ixgb_rx_desc
);
834 struct ixgb_hw
*hw
= &adapter
->hw
;
838 /* make sure receives are disabled while setting up the descriptors */
840 rctl
= IXGB_READ_REG(hw
, RCTL
);
841 IXGB_WRITE_REG(hw
, RCTL
, rctl
& ~IXGB_RCTL_RXEN
);
843 /* set the Receive Delay Timer Register */
845 IXGB_WRITE_REG(hw
, RDTR
, adapter
->rx_int_delay
);
847 /* Setup the Base and Length of the Rx Descriptor Ring */
849 IXGB_WRITE_REG(hw
, RDBAL
, (rdba
& 0x00000000ffffffffULL
));
850 IXGB_WRITE_REG(hw
, RDBAH
, (rdba
>> 32));
852 IXGB_WRITE_REG(hw
, RDLEN
, rdlen
);
854 /* Setup the HW Rx Head and Tail Descriptor Pointers */
855 IXGB_WRITE_REG(hw
, RDH
, 0);
856 IXGB_WRITE_REG(hw
, RDT
, 0);
858 /* due to the hardware errata with RXDCTL, we are unable to use any of
859 * the performance enhancing features of it without causing other
860 * subtle bugs, some of the bugs could include receive length
861 * corruption at high data rates (WTHRESH > 0) and/or receive
862 * descriptor ring irregularites (particularly in hardware cache) */
863 IXGB_WRITE_REG(hw
, RXDCTL
, 0);
865 /* Enable Receive Checksum Offload for TCP and UDP */
866 if (adapter
->rx_csum
) {
867 rxcsum
= IXGB_READ_REG(hw
, RXCSUM
);
868 rxcsum
|= IXGB_RXCSUM_TUOFL
;
869 IXGB_WRITE_REG(hw
, RXCSUM
, rxcsum
);
872 /* Enable Receives */
874 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
878 * ixgb_free_tx_resources - Free Tx Resources
879 * @adapter: board private structure
881 * Free all transmit software resources
885 ixgb_free_tx_resources(struct ixgb_adapter
*adapter
)
887 struct pci_dev
*pdev
= adapter
->pdev
;
889 ixgb_clean_tx_ring(adapter
);
891 vfree(adapter
->tx_ring
.buffer_info
);
892 adapter
->tx_ring
.buffer_info
= NULL
;
894 dma_free_coherent(&pdev
->dev
, adapter
->tx_ring
.size
,
895 adapter
->tx_ring
.desc
, adapter
->tx_ring
.dma
);
897 adapter
->tx_ring
.desc
= NULL
;
901 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter
*adapter
,
902 struct ixgb_buffer
*buffer_info
)
904 if (buffer_info
->dma
) {
905 if (buffer_info
->mapped_as_page
)
906 dma_unmap_page(&adapter
->pdev
->dev
, buffer_info
->dma
,
907 buffer_info
->length
, DMA_TO_DEVICE
);
909 dma_unmap_single(&adapter
->pdev
->dev
, buffer_info
->dma
,
910 buffer_info
->length
, DMA_TO_DEVICE
);
911 buffer_info
->dma
= 0;
914 if (buffer_info
->skb
) {
915 dev_kfree_skb_any(buffer_info
->skb
);
916 buffer_info
->skb
= NULL
;
918 buffer_info
->time_stamp
= 0;
919 /* these fields must always be initialized in tx
920 * buffer_info->length = 0;
921 * buffer_info->next_to_watch = 0; */
925 * ixgb_clean_tx_ring - Free Tx Buffers
926 * @adapter: board private structure
930 ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
)
932 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
933 struct ixgb_buffer
*buffer_info
;
937 /* Free all the Tx ring sk_buffs */
939 for (i
= 0; i
< tx_ring
->count
; i
++) {
940 buffer_info
= &tx_ring
->buffer_info
[i
];
941 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
944 size
= sizeof(struct ixgb_buffer
) * tx_ring
->count
;
945 memset(tx_ring
->buffer_info
, 0, size
);
947 /* Zero out the descriptor ring */
949 memset(tx_ring
->desc
, 0, tx_ring
->size
);
951 tx_ring
->next_to_use
= 0;
952 tx_ring
->next_to_clean
= 0;
954 IXGB_WRITE_REG(&adapter
->hw
, TDH
, 0);
955 IXGB_WRITE_REG(&adapter
->hw
, TDT
, 0);
959 * ixgb_free_rx_resources - Free Rx Resources
960 * @adapter: board private structure
962 * Free all receive software resources
966 ixgb_free_rx_resources(struct ixgb_adapter
*adapter
)
968 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
969 struct pci_dev
*pdev
= adapter
->pdev
;
971 ixgb_clean_rx_ring(adapter
);
973 vfree(rx_ring
->buffer_info
);
974 rx_ring
->buffer_info
= NULL
;
976 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
979 rx_ring
->desc
= NULL
;
983 * ixgb_clean_rx_ring - Free Rx Buffers
984 * @adapter: board private structure
988 ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
)
990 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
991 struct ixgb_buffer
*buffer_info
;
992 struct pci_dev
*pdev
= adapter
->pdev
;
996 /* Free all the Rx ring sk_buffs */
998 for (i
= 0; i
< rx_ring
->count
; i
++) {
999 buffer_info
= &rx_ring
->buffer_info
[i
];
1000 if (buffer_info
->dma
) {
1001 dma_unmap_single(&pdev
->dev
,
1003 buffer_info
->length
,
1005 buffer_info
->dma
= 0;
1006 buffer_info
->length
= 0;
1009 if (buffer_info
->skb
) {
1010 dev_kfree_skb(buffer_info
->skb
);
1011 buffer_info
->skb
= NULL
;
1015 size
= sizeof(struct ixgb_buffer
) * rx_ring
->count
;
1016 memset(rx_ring
->buffer_info
, 0, size
);
1018 /* Zero out the descriptor ring */
1020 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1022 rx_ring
->next_to_clean
= 0;
1023 rx_ring
->next_to_use
= 0;
1025 IXGB_WRITE_REG(&adapter
->hw
, RDH
, 0);
1026 IXGB_WRITE_REG(&adapter
->hw
, RDT
, 0);
1030 * ixgb_set_mac - Change the Ethernet Address of the NIC
1031 * @netdev: network interface device structure
1032 * @p: pointer to an address structure
1034 * Returns 0 on success, negative on failure
1038 ixgb_set_mac(struct net_device
*netdev
, void *p
)
1040 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1041 struct sockaddr
*addr
= p
;
1043 if (!is_valid_ether_addr(addr
->sa_data
))
1044 return -EADDRNOTAVAIL
;
1046 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1048 ixgb_rar_set(&adapter
->hw
, addr
->sa_data
, 0);
1054 * ixgb_set_multi - Multicast and Promiscuous mode set
1055 * @netdev: network interface device structure
1057 * The set_multi entry point is called whenever the multicast address
1058 * list or the network interface flags are updated. This routine is
1059 * responsible for configuring the hardware for proper multicast,
1060 * promiscuous mode, and all-multi behavior.
1064 ixgb_set_multi(struct net_device
*netdev
)
1066 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1067 struct ixgb_hw
*hw
= &adapter
->hw
;
1068 struct netdev_hw_addr
*ha
;
1072 /* Check for Promiscuous and All Multicast modes */
1074 rctl
= IXGB_READ_REG(hw
, RCTL
);
1076 if (netdev
->flags
& IFF_PROMISC
) {
1077 rctl
|= (IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1078 rctl
&= ~IXGB_RCTL_VFE
;
1080 if (netdev
->flags
& IFF_ALLMULTI
) {
1081 rctl
|= IXGB_RCTL_MPE
;
1082 rctl
&= ~IXGB_RCTL_UPE
;
1084 rctl
&= ~(IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1086 rctl
|= IXGB_RCTL_VFE
;
1089 if (netdev_mc_count(netdev
) > IXGB_MAX_NUM_MULTICAST_ADDRESSES
) {
1090 rctl
|= IXGB_RCTL_MPE
;
1091 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1093 u8 mta
[IXGB_MAX_NUM_MULTICAST_ADDRESSES
*
1094 IXGB_ETH_LENGTH_OF_ADDRESS
];
1096 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1099 netdev_for_each_mc_addr(ha
, netdev
)
1100 memcpy(&mta
[i
++ * IXGB_ETH_LENGTH_OF_ADDRESS
],
1101 ha
->addr
, IXGB_ETH_LENGTH_OF_ADDRESS
);
1103 ixgb_mc_addr_list_update(hw
, mta
, netdev_mc_count(netdev
), 0);
1108 * ixgb_watchdog - Timer Call-back
1109 * @data: pointer to netdev cast into an unsigned long
1113 ixgb_watchdog(unsigned long data
)
1115 struct ixgb_adapter
*adapter
= (struct ixgb_adapter
*)data
;
1116 struct net_device
*netdev
= adapter
->netdev
;
1117 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
1119 ixgb_check_for_link(&adapter
->hw
);
1121 if (ixgb_check_for_bad_link(&adapter
->hw
)) {
1122 /* force the reset path */
1123 netif_stop_queue(netdev
);
1126 if (adapter
->hw
.link_up
) {
1127 if (!netif_carrier_ok(netdev
)) {
1129 "NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n",
1130 (adapter
->hw
.fc
.type
== ixgb_fc_full
) ?
1132 (adapter
->hw
.fc
.type
== ixgb_fc_rx_pause
) ?
1134 (adapter
->hw
.fc
.type
== ixgb_fc_tx_pause
) ?
1136 adapter
->link_speed
= 10000;
1137 adapter
->link_duplex
= FULL_DUPLEX
;
1138 netif_carrier_on(netdev
);
1141 if (netif_carrier_ok(netdev
)) {
1142 adapter
->link_speed
= 0;
1143 adapter
->link_duplex
= 0;
1144 netdev_info(netdev
, "NIC Link is Down\n");
1145 netif_carrier_off(netdev
);
1149 ixgb_update_stats(adapter
);
1151 if (!netif_carrier_ok(netdev
)) {
1152 if (IXGB_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
1153 /* We've lost link, so the controller stops DMA,
1154 * but we've got queued Tx work that's never going
1155 * to get done, so reset controller to flush Tx.
1156 * (Do the reset outside of interrupt context). */
1157 schedule_work(&adapter
->tx_timeout_task
);
1158 /* return immediately since reset is imminent */
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
)
1180 struct ixgb_context_desc
*context_desc
;
1182 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
1183 u16 ipcse
, tucse
, mss
;
1186 if (likely(skb_is_gso(skb
))) {
1187 struct ixgb_buffer
*buffer_info
;
1190 if (skb_header_cloned(skb
)) {
1191 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
1196 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
1197 mss
= skb_shinfo(skb
)->gso_size
;
1201 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
1204 ipcss
= skb_network_offset(skb
);
1205 ipcso
= (void *)&(iph
->check
) - (void *)skb
->data
;
1206 ipcse
= skb_transport_offset(skb
) - 1;
1207 tucss
= skb_transport_offset(skb
);
1208 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
1211 i
= adapter
->tx_ring
.next_to_use
;
1212 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1213 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1214 WARN_ON(buffer_info
->dma
!= 0);
1216 context_desc
->ipcss
= ipcss
;
1217 context_desc
->ipcso
= ipcso
;
1218 context_desc
->ipcse
= cpu_to_le16(ipcse
);
1219 context_desc
->tucss
= tucss
;
1220 context_desc
->tucso
= tucso
;
1221 context_desc
->tucse
= cpu_to_le16(tucse
);
1222 context_desc
->mss
= cpu_to_le16(mss
);
1223 context_desc
->hdr_len
= hdr_len
;
1224 context_desc
->status
= 0;
1225 context_desc
->cmd_type_len
= cpu_to_le32(
1226 IXGB_CONTEXT_DESC_TYPE
1227 | IXGB_CONTEXT_DESC_CMD_TSE
1228 | IXGB_CONTEXT_DESC_CMD_IP
1229 | IXGB_CONTEXT_DESC_CMD_TCP
1230 | IXGB_CONTEXT_DESC_CMD_IDE
1231 | (skb
->len
- (hdr_len
)));
1234 if (++i
== adapter
->tx_ring
.count
) i
= 0;
1235 adapter
->tx_ring
.next_to_use
= i
;
1244 ixgb_tx_csum(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1246 struct ixgb_context_desc
*context_desc
;
1250 if (likely(skb
->ip_summed
== CHECKSUM_PARTIAL
)) {
1251 struct ixgb_buffer
*buffer_info
;
1252 css
= skb_transport_offset(skb
);
1253 cso
= css
+ skb
->csum_offset
;
1255 i
= adapter
->tx_ring
.next_to_use
;
1256 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1257 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1258 WARN_ON(buffer_info
->dma
!= 0);
1260 context_desc
->tucss
= css
;
1261 context_desc
->tucso
= cso
;
1262 context_desc
->tucse
= 0;
1263 /* zero out any previously existing data in one instruction */
1264 *(u32
*)&(context_desc
->ipcss
) = 0;
1265 context_desc
->status
= 0;
1266 context_desc
->hdr_len
= 0;
1267 context_desc
->mss
= 0;
1268 context_desc
->cmd_type_len
=
1269 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1270 | IXGB_TX_DESC_CMD_IDE
);
1272 if (++i
== adapter
->tx_ring
.count
) i
= 0;
1273 adapter
->tx_ring
.next_to_use
= i
;
1281 #define IXGB_MAX_TXD_PWR 14
1282 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1285 ixgb_tx_map(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
,
1288 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1289 struct pci_dev
*pdev
= adapter
->pdev
;
1290 struct ixgb_buffer
*buffer_info
;
1291 int len
= skb_headlen(skb
);
1292 unsigned int offset
= 0, size
, count
= 0, i
;
1293 unsigned int mss
= skb_shinfo(skb
)->gso_size
;
1294 unsigned int nr_frags
= skb_shinfo(skb
)->nr_frags
;
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 /* Workaround for premature desc write-backs
1303 * in TSO mode. Append 4-byte sentinel desc */
1304 if (unlikely(mss
&& !nr_frags
&& size
== len
&& size
> 8))
1307 buffer_info
->length
= size
;
1308 WARN_ON(buffer_info
->dma
!= 0);
1309 buffer_info
->time_stamp
= jiffies
;
1310 buffer_info
->mapped_as_page
= false;
1311 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
1313 size
, DMA_TO_DEVICE
);
1314 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
1316 buffer_info
->next_to_watch
= 0;
1323 if (i
== tx_ring
->count
)
1328 for (f
= 0; f
< nr_frags
; f
++) {
1329 struct skb_frag_struct
*frag
;
1331 frag
= &skb_shinfo(skb
)->frags
[f
];
1333 offset
= frag
->page_offset
;
1337 if (i
== tx_ring
->count
)
1340 buffer_info
= &tx_ring
->buffer_info
[i
];
1341 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1343 /* Workaround for premature desc write-backs
1344 * in TSO mode. Append 4-byte sentinel desc */
1345 if (unlikely(mss
&& (f
== (nr_frags
- 1))
1346 && size
== len
&& size
> 8))
1349 buffer_info
->length
= size
;
1350 buffer_info
->time_stamp
= jiffies
;
1351 buffer_info
->mapped_as_page
= true;
1353 dma_map_page(&pdev
->dev
, frag
->page
,
1354 offset
, size
, DMA_TO_DEVICE
);
1355 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
1357 buffer_info
->next_to_watch
= 0;
1364 tx_ring
->buffer_info
[i
].skb
= skb
;
1365 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
1370 dev_err(&pdev
->dev
, "TX DMA map failed\n");
1371 buffer_info
->dma
= 0;
1377 i
+= tx_ring
->count
;
1379 buffer_info
= &tx_ring
->buffer_info
[i
];
1380 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
1387 ixgb_tx_queue(struct ixgb_adapter
*adapter
, int count
, int vlan_id
,int tx_flags
)
1389 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1390 struct ixgb_tx_desc
*tx_desc
= NULL
;
1391 struct ixgb_buffer
*buffer_info
;
1392 u32 cmd_type_len
= adapter
->tx_cmd_type
;
1397 if (tx_flags
& IXGB_TX_FLAGS_TSO
) {
1398 cmd_type_len
|= IXGB_TX_DESC_CMD_TSE
;
1399 popts
|= (IXGB_TX_DESC_POPTS_IXSM
| IXGB_TX_DESC_POPTS_TXSM
);
1402 if (tx_flags
& IXGB_TX_FLAGS_CSUM
)
1403 popts
|= IXGB_TX_DESC_POPTS_TXSM
;
1405 if (tx_flags
& IXGB_TX_FLAGS_VLAN
)
1406 cmd_type_len
|= IXGB_TX_DESC_CMD_VLE
;
1408 i
= tx_ring
->next_to_use
;
1411 buffer_info
= &tx_ring
->buffer_info
[i
];
1412 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1413 tx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
1414 tx_desc
->cmd_type_len
=
1415 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
1416 tx_desc
->status
= status
;
1417 tx_desc
->popts
= popts
;
1418 tx_desc
->vlan
= cpu_to_le16(vlan_id
);
1420 if (++i
== tx_ring
->count
) i
= 0;
1423 tx_desc
->cmd_type_len
|=
1424 cpu_to_le32(IXGB_TX_DESC_CMD_EOP
| IXGB_TX_DESC_CMD_RS
);
1426 /* Force memory writes to complete before letting h/w
1427 * know there are new descriptors to fetch. (Only
1428 * applicable for weak-ordered memory model archs,
1429 * such as IA-64). */
1432 tx_ring
->next_to_use
= i
;
1433 IXGB_WRITE_REG(&adapter
->hw
, TDT
, i
);
1436 static int __ixgb_maybe_stop_tx(struct net_device
*netdev
, int size
)
1438 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1439 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1441 netif_stop_queue(netdev
);
1442 /* Herbert's original patch had:
1443 * smp_mb__after_netif_stop_queue();
1444 * but since that doesn't exist yet, just open code it. */
1447 /* We need to check again in a case another CPU has just
1448 * made room available. */
1449 if (likely(IXGB_DESC_UNUSED(tx_ring
) < size
))
1453 netif_start_queue(netdev
);
1454 ++adapter
->restart_queue
;
1458 static int ixgb_maybe_stop_tx(struct net_device
*netdev
,
1459 struct ixgb_desc_ring
*tx_ring
, int size
)
1461 if (likely(IXGB_DESC_UNUSED(tx_ring
) >= size
))
1463 return __ixgb_maybe_stop_tx(netdev
, size
);
1467 /* Tx Descriptors needed, worst case */
1468 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1469 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1470 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1471 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1472 + 1 /* one more needed for sentinel TSO workaround */
1475 ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
1477 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1479 unsigned int tx_flags
= 0;
1484 if (test_bit(__IXGB_DOWN
, &adapter
->flags
)) {
1486 return NETDEV_TX_OK
;
1489 if (skb
->len
<= 0) {
1491 return NETDEV_TX_OK
;
1494 if (unlikely(ixgb_maybe_stop_tx(netdev
, &adapter
->tx_ring
,
1496 return NETDEV_TX_BUSY
;
1498 if (adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
1499 tx_flags
|= IXGB_TX_FLAGS_VLAN
;
1500 vlan_id
= vlan_tx_tag_get(skb
);
1503 first
= adapter
->tx_ring
.next_to_use
;
1505 tso
= ixgb_tso(adapter
, skb
);
1508 return NETDEV_TX_OK
;
1512 tx_flags
|= IXGB_TX_FLAGS_TSO
;
1513 else if (ixgb_tx_csum(adapter
, skb
))
1514 tx_flags
|= IXGB_TX_FLAGS_CSUM
;
1516 count
= ixgb_tx_map(adapter
, skb
, first
);
1519 ixgb_tx_queue(adapter
, count
, vlan_id
, tx_flags
);
1520 /* Make sure there is space in the ring for the next send. */
1521 ixgb_maybe_stop_tx(netdev
, &adapter
->tx_ring
, DESC_NEEDED
);
1524 dev_kfree_skb_any(skb
);
1525 adapter
->tx_ring
.buffer_info
[first
].time_stamp
= 0;
1526 adapter
->tx_ring
.next_to_use
= first
;
1529 return NETDEV_TX_OK
;
1533 * ixgb_tx_timeout - Respond to a Tx Hang
1534 * @netdev: network interface device structure
1538 ixgb_tx_timeout(struct net_device
*netdev
)
1540 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1542 /* Do the reset outside of interrupt context */
1543 schedule_work(&adapter
->tx_timeout_task
);
1547 ixgb_tx_timeout_task(struct work_struct
*work
)
1549 struct ixgb_adapter
*adapter
=
1550 container_of(work
, struct ixgb_adapter
, tx_timeout_task
);
1552 adapter
->tx_timeout_count
++;
1553 ixgb_down(adapter
, true);
1558 * ixgb_get_stats - Get System Network Statistics
1559 * @netdev: network interface device structure
1561 * Returns the address of the device statistics structure.
1562 * The statistics are actually updated from the timer callback.
1565 static struct net_device_stats
*
1566 ixgb_get_stats(struct net_device
*netdev
)
1568 return &netdev
->stats
;
1572 * ixgb_change_mtu - Change the Maximum Transfer Unit
1573 * @netdev: network interface device structure
1574 * @new_mtu: new value for maximum frame size
1576 * Returns 0 on success, negative on failure
1580 ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
)
1582 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1583 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1584 int old_max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1586 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1587 if ((new_mtu
< 68) ||
1588 (max_frame
> IXGB_MAX_JUMBO_FRAME_SIZE
+ ENET_FCS_LENGTH
)) {
1589 netif_err(adapter
, probe
, adapter
->netdev
,
1590 "Invalid MTU setting %d\n", new_mtu
);
1594 if (old_max_frame
== max_frame
)
1597 if (netif_running(netdev
))
1598 ixgb_down(adapter
, true);
1600 adapter
->rx_buffer_len
= max_frame
+ 8; /* + 8 for errata */
1602 netdev
->mtu
= new_mtu
;
1604 if (netif_running(netdev
))
1611 * ixgb_update_stats - Update the board statistics counters.
1612 * @adapter: board private structure
1616 ixgb_update_stats(struct ixgb_adapter
*adapter
)
1618 struct net_device
*netdev
= adapter
->netdev
;
1619 struct pci_dev
*pdev
= adapter
->pdev
;
1621 /* Prevent stats update while adapter is being reset */
1622 if (pci_channel_offline(pdev
))
1625 if ((netdev
->flags
& IFF_PROMISC
) || (netdev
->flags
& IFF_ALLMULTI
) ||
1626 (netdev_mc_count(netdev
) > IXGB_MAX_NUM_MULTICAST_ADDRESSES
)) {
1627 u64 multi
= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1628 u32 bcast_l
= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1629 u32 bcast_h
= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1630 u64 bcast
= ((u64
)bcast_h
<< 32) | bcast_l
;
1632 multi
|= ((u64
)IXGB_READ_REG(&adapter
->hw
, MPRCH
) << 32);
1633 /* fix up multicast stats by removing broadcasts */
1637 adapter
->stats
.mprcl
+= (multi
& 0xFFFFFFFF);
1638 adapter
->stats
.mprch
+= (multi
>> 32);
1639 adapter
->stats
.bprcl
+= bcast_l
;
1640 adapter
->stats
.bprch
+= bcast_h
;
1642 adapter
->stats
.mprcl
+= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1643 adapter
->stats
.mprch
+= IXGB_READ_REG(&adapter
->hw
, MPRCH
);
1644 adapter
->stats
.bprcl
+= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1645 adapter
->stats
.bprch
+= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1647 adapter
->stats
.tprl
+= IXGB_READ_REG(&adapter
->hw
, TPRL
);
1648 adapter
->stats
.tprh
+= IXGB_READ_REG(&adapter
->hw
, TPRH
);
1649 adapter
->stats
.gprcl
+= IXGB_READ_REG(&adapter
->hw
, GPRCL
);
1650 adapter
->stats
.gprch
+= IXGB_READ_REG(&adapter
->hw
, GPRCH
);
1651 adapter
->stats
.uprcl
+= IXGB_READ_REG(&adapter
->hw
, UPRCL
);
1652 adapter
->stats
.uprch
+= IXGB_READ_REG(&adapter
->hw
, UPRCH
);
1653 adapter
->stats
.vprcl
+= IXGB_READ_REG(&adapter
->hw
, VPRCL
);
1654 adapter
->stats
.vprch
+= IXGB_READ_REG(&adapter
->hw
, VPRCH
);
1655 adapter
->stats
.jprcl
+= IXGB_READ_REG(&adapter
->hw
, JPRCL
);
1656 adapter
->stats
.jprch
+= IXGB_READ_REG(&adapter
->hw
, JPRCH
);
1657 adapter
->stats
.gorcl
+= IXGB_READ_REG(&adapter
->hw
, GORCL
);
1658 adapter
->stats
.gorch
+= IXGB_READ_REG(&adapter
->hw
, GORCH
);
1659 adapter
->stats
.torl
+= IXGB_READ_REG(&adapter
->hw
, TORL
);
1660 adapter
->stats
.torh
+= IXGB_READ_REG(&adapter
->hw
, TORH
);
1661 adapter
->stats
.rnbc
+= IXGB_READ_REG(&adapter
->hw
, RNBC
);
1662 adapter
->stats
.ruc
+= IXGB_READ_REG(&adapter
->hw
, RUC
);
1663 adapter
->stats
.roc
+= IXGB_READ_REG(&adapter
->hw
, ROC
);
1664 adapter
->stats
.rlec
+= IXGB_READ_REG(&adapter
->hw
, RLEC
);
1665 adapter
->stats
.crcerrs
+= IXGB_READ_REG(&adapter
->hw
, CRCERRS
);
1666 adapter
->stats
.icbc
+= IXGB_READ_REG(&adapter
->hw
, ICBC
);
1667 adapter
->stats
.ecbc
+= IXGB_READ_REG(&adapter
->hw
, ECBC
);
1668 adapter
->stats
.mpc
+= IXGB_READ_REG(&adapter
->hw
, MPC
);
1669 adapter
->stats
.tptl
+= IXGB_READ_REG(&adapter
->hw
, TPTL
);
1670 adapter
->stats
.tpth
+= IXGB_READ_REG(&adapter
->hw
, TPTH
);
1671 adapter
->stats
.gptcl
+= IXGB_READ_REG(&adapter
->hw
, GPTCL
);
1672 adapter
->stats
.gptch
+= IXGB_READ_REG(&adapter
->hw
, GPTCH
);
1673 adapter
->stats
.bptcl
+= IXGB_READ_REG(&adapter
->hw
, BPTCL
);
1674 adapter
->stats
.bptch
+= IXGB_READ_REG(&adapter
->hw
, BPTCH
);
1675 adapter
->stats
.mptcl
+= IXGB_READ_REG(&adapter
->hw
, MPTCL
);
1676 adapter
->stats
.mptch
+= IXGB_READ_REG(&adapter
->hw
, MPTCH
);
1677 adapter
->stats
.uptcl
+= IXGB_READ_REG(&adapter
->hw
, UPTCL
);
1678 adapter
->stats
.uptch
+= IXGB_READ_REG(&adapter
->hw
, UPTCH
);
1679 adapter
->stats
.vptcl
+= IXGB_READ_REG(&adapter
->hw
, VPTCL
);
1680 adapter
->stats
.vptch
+= IXGB_READ_REG(&adapter
->hw
, VPTCH
);
1681 adapter
->stats
.jptcl
+= IXGB_READ_REG(&adapter
->hw
, JPTCL
);
1682 adapter
->stats
.jptch
+= IXGB_READ_REG(&adapter
->hw
, JPTCH
);
1683 adapter
->stats
.gotcl
+= IXGB_READ_REG(&adapter
->hw
, GOTCL
);
1684 adapter
->stats
.gotch
+= IXGB_READ_REG(&adapter
->hw
, GOTCH
);
1685 adapter
->stats
.totl
+= IXGB_READ_REG(&adapter
->hw
, TOTL
);
1686 adapter
->stats
.toth
+= IXGB_READ_REG(&adapter
->hw
, TOTH
);
1687 adapter
->stats
.dc
+= IXGB_READ_REG(&adapter
->hw
, DC
);
1688 adapter
->stats
.plt64c
+= IXGB_READ_REG(&adapter
->hw
, PLT64C
);
1689 adapter
->stats
.tsctc
+= IXGB_READ_REG(&adapter
->hw
, TSCTC
);
1690 adapter
->stats
.tsctfc
+= IXGB_READ_REG(&adapter
->hw
, TSCTFC
);
1691 adapter
->stats
.ibic
+= IXGB_READ_REG(&adapter
->hw
, IBIC
);
1692 adapter
->stats
.rfc
+= IXGB_READ_REG(&adapter
->hw
, RFC
);
1693 adapter
->stats
.lfc
+= IXGB_READ_REG(&adapter
->hw
, LFC
);
1694 adapter
->stats
.pfrc
+= IXGB_READ_REG(&adapter
->hw
, PFRC
);
1695 adapter
->stats
.pftc
+= IXGB_READ_REG(&adapter
->hw
, PFTC
);
1696 adapter
->stats
.mcfrc
+= IXGB_READ_REG(&adapter
->hw
, MCFRC
);
1697 adapter
->stats
.mcftc
+= IXGB_READ_REG(&adapter
->hw
, MCFTC
);
1698 adapter
->stats
.xonrxc
+= IXGB_READ_REG(&adapter
->hw
, XONRXC
);
1699 adapter
->stats
.xontxc
+= IXGB_READ_REG(&adapter
->hw
, XONTXC
);
1700 adapter
->stats
.xoffrxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFRXC
);
1701 adapter
->stats
.xofftxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFTXC
);
1702 adapter
->stats
.rjc
+= IXGB_READ_REG(&adapter
->hw
, RJC
);
1704 /* Fill out the OS statistics structure */
1706 netdev
->stats
.rx_packets
= adapter
->stats
.gprcl
;
1707 netdev
->stats
.tx_packets
= adapter
->stats
.gptcl
;
1708 netdev
->stats
.rx_bytes
= adapter
->stats
.gorcl
;
1709 netdev
->stats
.tx_bytes
= adapter
->stats
.gotcl
;
1710 netdev
->stats
.multicast
= adapter
->stats
.mprcl
;
1711 netdev
->stats
.collisions
= 0;
1713 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1714 * with a length in the type/len field */
1715 netdev
->stats
.rx_errors
=
1716 /* adapter->stats.rnbc + */ adapter
->stats
.crcerrs
+
1717 adapter
->stats
.ruc
+
1718 adapter
->stats
.roc
/*+ adapter->stats.rlec */ +
1719 adapter
->stats
.icbc
+
1720 adapter
->stats
.ecbc
+ adapter
->stats
.mpc
;
1723 * netdev->stats.rx_length_errors = adapter->stats.rlec;
1726 netdev
->stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
1727 netdev
->stats
.rx_fifo_errors
= adapter
->stats
.mpc
;
1728 netdev
->stats
.rx_missed_errors
= adapter
->stats
.mpc
;
1729 netdev
->stats
.rx_over_errors
= adapter
->stats
.mpc
;
1731 netdev
->stats
.tx_errors
= 0;
1732 netdev
->stats
.rx_frame_errors
= 0;
1733 netdev
->stats
.tx_aborted_errors
= 0;
1734 netdev
->stats
.tx_carrier_errors
= 0;
1735 netdev
->stats
.tx_fifo_errors
= 0;
1736 netdev
->stats
.tx_heartbeat_errors
= 0;
1737 netdev
->stats
.tx_window_errors
= 0;
1740 #define IXGB_MAX_INTR 10
1742 * ixgb_intr - Interrupt Handler
1743 * @irq: interrupt number
1744 * @data: pointer to a network interface device structure
1748 ixgb_intr(int irq
, void *data
)
1750 struct net_device
*netdev
= data
;
1751 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1752 struct ixgb_hw
*hw
= &adapter
->hw
;
1753 u32 icr
= IXGB_READ_REG(hw
, ICR
);
1756 return IRQ_NONE
; /* Not our interrupt */
1758 if (unlikely(icr
& (IXGB_INT_RXSEQ
| IXGB_INT_LSC
)))
1759 if (!test_bit(__IXGB_DOWN
, &adapter
->flags
))
1760 mod_timer(&adapter
->watchdog_timer
, jiffies
);
1762 if (napi_schedule_prep(&adapter
->napi
)) {
1764 /* Disable interrupts and register for poll. The flush
1765 of the posted write is intentionally left out.
1768 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
1769 __napi_schedule(&adapter
->napi
);
1775 * ixgb_clean - NAPI Rx polling callback
1776 * @adapter: board private structure
1780 ixgb_clean(struct napi_struct
*napi
, int budget
)
1782 struct ixgb_adapter
*adapter
= container_of(napi
, struct ixgb_adapter
, napi
);
1785 ixgb_clean_tx_irq(adapter
);
1786 ixgb_clean_rx_irq(adapter
, &work_done
, budget
);
1788 /* If budget not fully consumed, exit the polling mode */
1789 if (work_done
< budget
) {
1790 napi_complete(napi
);
1791 if (!test_bit(__IXGB_DOWN
, &adapter
->flags
))
1792 ixgb_irq_enable(adapter
);
1799 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1800 * @adapter: board private structure
1804 ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
)
1806 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1807 struct net_device
*netdev
= adapter
->netdev
;
1808 struct ixgb_tx_desc
*tx_desc
, *eop_desc
;
1809 struct ixgb_buffer
*buffer_info
;
1810 unsigned int i
, eop
;
1811 bool cleaned
= false;
1813 i
= tx_ring
->next_to_clean
;
1814 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1815 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1817 while (eop_desc
->status
& IXGB_TX_DESC_STATUS_DD
) {
1819 for (cleaned
= false; !cleaned
; ) {
1820 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1821 buffer_info
= &tx_ring
->buffer_info
[i
];
1823 if (tx_desc
->popts
&
1824 (IXGB_TX_DESC_POPTS_TXSM
|
1825 IXGB_TX_DESC_POPTS_IXSM
))
1826 adapter
->hw_csum_tx_good
++;
1828 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
1830 *(u32
*)&(tx_desc
->status
) = 0;
1832 cleaned
= (i
== eop
);
1833 if (++i
== tx_ring
->count
) i
= 0;
1836 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1837 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1840 tx_ring
->next_to_clean
= i
;
1842 if (unlikely(cleaned
&& netif_carrier_ok(netdev
) &&
1843 IXGB_DESC_UNUSED(tx_ring
) >= DESC_NEEDED
)) {
1844 /* Make sure that anybody stopping the queue after this
1845 * sees the new next_to_clean. */
1848 if (netif_queue_stopped(netdev
) &&
1849 !(test_bit(__IXGB_DOWN
, &adapter
->flags
))) {
1850 netif_wake_queue(netdev
);
1851 ++adapter
->restart_queue
;
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
].time_stamp
&&
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 netif_err(adapter
, drv
, adapter
->netdev
,
1865 "Detected Tx Unit Hang\n"
1868 " next_to_use <%x>\n"
1869 " next_to_clean <%x>\n"
1870 "buffer_info[next_to_clean]\n"
1871 " time_stamp <%lx>\n"
1872 " next_to_watch <%x>\n"
1874 " next_to_watch.status <%x>\n",
1875 IXGB_READ_REG(&adapter
->hw
, TDH
),
1876 IXGB_READ_REG(&adapter
->hw
, TDT
),
1877 tx_ring
->next_to_use
,
1878 tx_ring
->next_to_clean
,
1879 tx_ring
->buffer_info
[eop
].time_stamp
,
1883 netif_stop_queue(netdev
);
1891 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1892 * @adapter: board private structure
1893 * @rx_desc: receive descriptor
1894 * @sk_buff: socket buffer with received data
1898 ixgb_rx_checksum(struct ixgb_adapter
*adapter
,
1899 struct ixgb_rx_desc
*rx_desc
,
1900 struct sk_buff
*skb
)
1902 /* Ignore Checksum bit is set OR
1903 * TCP Checksum has not been calculated
1905 if ((rx_desc
->status
& IXGB_RX_DESC_STATUS_IXSM
) ||
1906 (!(rx_desc
->status
& IXGB_RX_DESC_STATUS_TCPCS
))) {
1907 skb
->ip_summed
= CHECKSUM_NONE
;
1911 /* At this point we know the hardware did the TCP checksum */
1912 /* now look at the TCP checksum error bit */
1913 if (rx_desc
->errors
& IXGB_RX_DESC_ERRORS_TCPE
) {
1914 /* let the stack verify checksum errors */
1915 skb
->ip_summed
= CHECKSUM_NONE
;
1916 adapter
->hw_csum_rx_error
++;
1918 /* TCP checksum is good */
1919 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1920 adapter
->hw_csum_rx_good
++;
1925 * this should improve performance for small packets with large amounts
1926 * of reassembly being done in the stack
1928 static void ixgb_check_copybreak(struct net_device
*netdev
,
1929 struct ixgb_buffer
*buffer_info
,
1930 u32 length
, struct sk_buff
**skb
)
1932 struct sk_buff
*new_skb
;
1934 if (length
> copybreak
)
1937 new_skb
= netdev_alloc_skb_ip_align(netdev
, length
);
1941 skb_copy_to_linear_data_offset(new_skb
, -NET_IP_ALIGN
,
1942 (*skb
)->data
- NET_IP_ALIGN
,
1943 length
+ NET_IP_ALIGN
);
1944 /* save the skb in buffer_info as good */
1945 buffer_info
->skb
= *skb
;
1950 * ixgb_clean_rx_irq - Send received data up the network stack,
1951 * @adapter: board private structure
1955 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
, int *work_done
, int work_to_do
)
1957 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1958 struct net_device
*netdev
= adapter
->netdev
;
1959 struct pci_dev
*pdev
= adapter
->pdev
;
1960 struct ixgb_rx_desc
*rx_desc
, *next_rxd
;
1961 struct ixgb_buffer
*buffer_info
, *next_buffer
, *next2_buffer
;
1964 int cleaned_count
= 0;
1965 bool cleaned
= false;
1967 i
= rx_ring
->next_to_clean
;
1968 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
1969 buffer_info
= &rx_ring
->buffer_info
[i
];
1971 while (rx_desc
->status
& IXGB_RX_DESC_STATUS_DD
) {
1972 struct sk_buff
*skb
;
1975 if (*work_done
>= work_to_do
)
1979 status
= rx_desc
->status
;
1980 skb
= buffer_info
->skb
;
1981 buffer_info
->skb
= NULL
;
1983 prefetch(skb
->data
- NET_IP_ALIGN
);
1985 if (++i
== rx_ring
->count
)
1987 next_rxd
= IXGB_RX_DESC(*rx_ring
, i
);
1991 if (j
== rx_ring
->count
)
1993 next2_buffer
= &rx_ring
->buffer_info
[j
];
1994 prefetch(next2_buffer
);
1996 next_buffer
= &rx_ring
->buffer_info
[i
];
2001 dma_unmap_single(&pdev
->dev
,
2003 buffer_info
->length
,
2005 buffer_info
->dma
= 0;
2007 length
= le16_to_cpu(rx_desc
->length
);
2008 rx_desc
->length
= 0;
2010 if (unlikely(!(status
& IXGB_RX_DESC_STATUS_EOP
))) {
2012 /* All receives must fit into a single buffer */
2014 IXGB_DBG("Receive packet consumed multiple buffers "
2015 "length<%x>\n", length
);
2017 dev_kfree_skb_irq(skb
);
2021 if (unlikely(rx_desc
->errors
&
2022 (IXGB_RX_DESC_ERRORS_CE
| IXGB_RX_DESC_ERRORS_SE
|
2023 IXGB_RX_DESC_ERRORS_P
| IXGB_RX_DESC_ERRORS_RXE
))) {
2024 dev_kfree_skb_irq(skb
);
2028 ixgb_check_copybreak(netdev
, buffer_info
, length
, &skb
);
2031 skb_put(skb
, length
);
2033 /* Receive Checksum Offload */
2034 ixgb_rx_checksum(adapter
, rx_desc
, skb
);
2036 skb
->protocol
= eth_type_trans(skb
, netdev
);
2037 if (adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
2038 vlan_hwaccel_receive_skb(skb
, adapter
->vlgrp
,
2039 le16_to_cpu(rx_desc
->special
));
2041 netif_receive_skb(skb
);
2045 /* clean up descriptor, might be written over by hw */
2046 rx_desc
->status
= 0;
2048 /* return some buffers to hardware, one at a time is too slow */
2049 if (unlikely(cleaned_count
>= IXGB_RX_BUFFER_WRITE
)) {
2050 ixgb_alloc_rx_buffers(adapter
, cleaned_count
);
2054 /* use prefetched values */
2056 buffer_info
= next_buffer
;
2059 rx_ring
->next_to_clean
= i
;
2061 cleaned_count
= IXGB_DESC_UNUSED(rx_ring
);
2063 ixgb_alloc_rx_buffers(adapter
, cleaned_count
);
2069 * ixgb_alloc_rx_buffers - Replace used receive buffers
2070 * @adapter: address of board private structure
2074 ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
, int cleaned_count
)
2076 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
2077 struct net_device
*netdev
= adapter
->netdev
;
2078 struct pci_dev
*pdev
= adapter
->pdev
;
2079 struct ixgb_rx_desc
*rx_desc
;
2080 struct ixgb_buffer
*buffer_info
;
2081 struct sk_buff
*skb
;
2085 i
= rx_ring
->next_to_use
;
2086 buffer_info
= &rx_ring
->buffer_info
[i
];
2087 cleancount
= IXGB_DESC_UNUSED(rx_ring
);
2090 /* leave three descriptors unused */
2091 while (--cleancount
> 2 && cleaned_count
--) {
2092 /* recycle! its good for you */
2093 skb
= buffer_info
->skb
;
2099 skb
= netdev_alloc_skb_ip_align(netdev
, adapter
->rx_buffer_len
);
2100 if (unlikely(!skb
)) {
2101 /* Better luck next round */
2102 adapter
->alloc_rx_buff_failed
++;
2106 buffer_info
->skb
= skb
;
2107 buffer_info
->length
= adapter
->rx_buffer_len
;
2109 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
2111 adapter
->rx_buffer_len
,
2114 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
2115 rx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
2116 /* guarantee DD bit not set now before h/w gets descriptor
2117 * this is the rest of the workaround for h/w double
2119 rx_desc
->status
= 0;
2122 if (++i
== rx_ring
->count
) i
= 0;
2123 buffer_info
= &rx_ring
->buffer_info
[i
];
2126 if (likely(rx_ring
->next_to_use
!= i
)) {
2127 rx_ring
->next_to_use
= i
;
2128 if (unlikely(i
-- == 0))
2129 i
= (rx_ring
->count
- 1);
2131 /* Force memory writes to complete before letting h/w
2132 * know there are new descriptors to fetch. (Only
2133 * applicable for weak-ordered memory model archs, such
2136 IXGB_WRITE_REG(&adapter
->hw
, RDT
, i
);
2141 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2143 * @param netdev network interface device structure
2144 * @param grp indicates to enable or disable tagging/stripping
2147 ixgb_vlan_rx_register(struct net_device
*netdev
, struct vlan_group
*grp
)
2149 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2152 ixgb_irq_disable(adapter
);
2153 adapter
->vlgrp
= grp
;
2156 /* enable VLAN tag insert/strip */
2157 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2158 ctrl
|= IXGB_CTRL0_VME
;
2159 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2161 /* enable VLAN receive filtering */
2163 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2164 rctl
&= ~IXGB_RCTL_CFIEN
;
2165 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2167 /* disable VLAN tag insert/strip */
2169 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2170 ctrl
&= ~IXGB_CTRL0_VME
;
2171 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2174 /* don't enable interrupts unless we are UP */
2175 if (adapter
->netdev
->flags
& IFF_UP
)
2176 ixgb_irq_enable(adapter
);
2180 ixgb_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
2182 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2185 /* add VID to filter table */
2187 index
= (vid
>> 5) & 0x7F;
2188 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2189 vfta
|= (1 << (vid
& 0x1F));
2190 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2194 ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
2196 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2199 ixgb_irq_disable(adapter
);
2201 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
2203 /* don't enable interrupts unless we are UP */
2204 if (adapter
->netdev
->flags
& IFF_UP
)
2205 ixgb_irq_enable(adapter
);
2207 /* remove VID from filter table */
2209 index
= (vid
>> 5) & 0x7F;
2210 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2211 vfta
&= ~(1 << (vid
& 0x1F));
2212 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2216 ixgb_restore_vlan(struct ixgb_adapter
*adapter
)
2218 ixgb_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
2220 if (adapter
->vlgrp
) {
2222 for (vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
2223 if (!vlan_group_get_device(adapter
->vlgrp
, vid
))
2225 ixgb_vlan_rx_add_vid(adapter
->netdev
, vid
);
2230 #ifdef CONFIG_NET_POLL_CONTROLLER
2232 * Polling 'interrupt' - used by things like netconsole to send skbs
2233 * without having to re-enable interrupts. It's not called while
2234 * the interrupt routine is executing.
2237 static void ixgb_netpoll(struct net_device
*dev
)
2239 struct ixgb_adapter
*adapter
= netdev_priv(dev
);
2241 disable_irq(adapter
->pdev
->irq
);
2242 ixgb_intr(adapter
->pdev
->irq
, dev
);
2243 enable_irq(adapter
->pdev
->irq
);
2248 * ixgb_io_error_detected() - called when PCI error is detected
2249 * @pdev pointer to pci device with error
2250 * @state pci channel state after error
2252 * This callback is called by the PCI subsystem whenever
2253 * a PCI bus error is detected.
2255 static pci_ers_result_t
ixgb_io_error_detected(struct pci_dev
*pdev
,
2256 enum pci_channel_state state
)
2258 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2259 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2261 netif_device_detach(netdev
);
2263 if (state
== pci_channel_io_perm_failure
)
2264 return PCI_ERS_RESULT_DISCONNECT
;
2266 if (netif_running(netdev
))
2267 ixgb_down(adapter
, true);
2269 pci_disable_device(pdev
);
2271 /* Request a slot reset. */
2272 return PCI_ERS_RESULT_NEED_RESET
;
2276 * ixgb_io_slot_reset - called after the pci bus has been reset.
2277 * @pdev pointer to pci device with error
2279 * This callback is called after the PCI bus has been reset.
2280 * Basically, this tries to restart the card from scratch.
2281 * This is a shortened version of the device probe/discovery code,
2282 * it resembles the first-half of the ixgb_probe() routine.
2284 static pci_ers_result_t
ixgb_io_slot_reset(struct pci_dev
*pdev
)
2286 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2287 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2289 if (pci_enable_device(pdev
)) {
2290 netif_err(adapter
, probe
, adapter
->netdev
,
2291 "Cannot re-enable PCI device after reset\n");
2292 return PCI_ERS_RESULT_DISCONNECT
;
2295 /* Perform card reset only on one instance of the card */
2296 if (0 != PCI_FUNC (pdev
->devfn
))
2297 return PCI_ERS_RESULT_RECOVERED
;
2299 pci_set_master(pdev
);
2301 netif_carrier_off(netdev
);
2302 netif_stop_queue(netdev
);
2303 ixgb_reset(adapter
);
2305 /* Make sure the EEPROM is good */
2306 if (!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
2307 netif_err(adapter
, probe
, adapter
->netdev
,
2308 "After reset, the EEPROM checksum is not valid\n");
2309 return PCI_ERS_RESULT_DISCONNECT
;
2311 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
2312 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
2314 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
2315 netif_err(adapter
, probe
, adapter
->netdev
,
2316 "After reset, invalid MAC address\n");
2317 return PCI_ERS_RESULT_DISCONNECT
;
2320 return PCI_ERS_RESULT_RECOVERED
;
2324 * ixgb_io_resume - called when its OK to resume normal operations
2325 * @pdev pointer to pci device with error
2327 * The error recovery driver tells us that its OK to resume
2328 * normal operation. Implementation resembles the second-half
2329 * of the ixgb_probe() routine.
2331 static void ixgb_io_resume(struct pci_dev
*pdev
)
2333 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2334 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2336 pci_set_master(pdev
);
2338 if (netif_running(netdev
)) {
2339 if (ixgb_up(adapter
)) {
2340 pr_err("can't bring device back up after reset\n");
2345 netif_device_attach(netdev
);
2346 mod_timer(&adapter
->watchdog_timer
, jiffies
);