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 *******************************************************************************/
31 char ixgb_driver_name
[] = "ixgb";
32 static char ixgb_driver_string
[] = "Intel(R) PRO/10GbE Network Driver";
34 #define DRIVERNAPI "-NAPI"
35 #define DRV_VERSION "1.0.135-k2" DRIVERNAPI
36 const char ixgb_driver_version
[] = DRV_VERSION
;
37 static const char ixgb_copyright
[] = "Copyright (c) 1999-2008 Intel Corporation.";
39 #define IXGB_CB_LENGTH 256
40 static unsigned int copybreak __read_mostly
= IXGB_CB_LENGTH
;
41 module_param(copybreak
, uint
, 0644);
42 MODULE_PARM_DESC(copybreak
,
43 "Maximum size of packet that is copied to a new buffer on receive");
45 /* ixgb_pci_tbl - PCI Device ID Table
47 * Wildcard entries (PCI_ANY_ID) should come last
48 * Last entry must be all 0s
50 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
51 * Class, Class Mask, private data (not used) }
53 static struct pci_device_id ixgb_pci_tbl
[] = {
54 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX
,
55 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
56 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_CX4
,
57 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
58 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_SR
,
59 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
60 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_LR
,
61 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
63 /* required last entry */
67 MODULE_DEVICE_TABLE(pci
, ixgb_pci_tbl
);
69 /* Local Function Prototypes */
70 static int ixgb_init_module(void);
71 static void ixgb_exit_module(void);
72 static int ixgb_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
73 static void __devexit
ixgb_remove(struct pci_dev
*pdev
);
74 static int ixgb_sw_init(struct ixgb_adapter
*adapter
);
75 static int ixgb_open(struct net_device
*netdev
);
76 static int ixgb_close(struct net_device
*netdev
);
77 static void ixgb_configure_tx(struct ixgb_adapter
*adapter
);
78 static void ixgb_configure_rx(struct ixgb_adapter
*adapter
);
79 static void ixgb_setup_rctl(struct ixgb_adapter
*adapter
);
80 static void ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
);
81 static void ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
);
82 static void ixgb_set_multi(struct net_device
*netdev
);
83 static void ixgb_watchdog(unsigned long data
);
84 static int ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
);
85 static struct net_device_stats
*ixgb_get_stats(struct net_device
*netdev
);
86 static int ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
);
87 static int ixgb_set_mac(struct net_device
*netdev
, void *p
);
88 static irqreturn_t
ixgb_intr(int irq
, void *data
);
89 static bool ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
);
91 static int ixgb_clean(struct napi_struct
*, int);
92 static bool ixgb_clean_rx_irq(struct ixgb_adapter
*, int *, int);
93 static void ixgb_alloc_rx_buffers(struct ixgb_adapter
*, int);
95 static void ixgb_tx_timeout(struct net_device
*dev
);
96 static void ixgb_tx_timeout_task(struct work_struct
*work
);
98 static void ixgb_vlan_rx_register(struct net_device
*netdev
,
99 struct vlan_group
*grp
);
100 static void ixgb_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
);
101 static void ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
);
102 static void ixgb_restore_vlan(struct ixgb_adapter
*adapter
);
104 #ifdef CONFIG_NET_POLL_CONTROLLER
105 /* for netdump / net console */
106 static void ixgb_netpoll(struct net_device
*dev
);
109 static pci_ers_result_t
ixgb_io_error_detected (struct pci_dev
*pdev
,
110 enum pci_channel_state state
);
111 static pci_ers_result_t
ixgb_io_slot_reset (struct pci_dev
*pdev
);
112 static void ixgb_io_resume (struct pci_dev
*pdev
);
114 static struct pci_error_handlers ixgb_err_handler
= {
115 .error_detected
= ixgb_io_error_detected
,
116 .slot_reset
= ixgb_io_slot_reset
,
117 .resume
= ixgb_io_resume
,
120 static struct pci_driver ixgb_driver
= {
121 .name
= ixgb_driver_name
,
122 .id_table
= ixgb_pci_tbl
,
124 .remove
= __devexit_p(ixgb_remove
),
125 .err_handler
= &ixgb_err_handler
128 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
129 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
130 MODULE_LICENSE("GPL");
131 MODULE_VERSION(DRV_VERSION
);
133 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
134 static int debug
= DEFAULT_DEBUG_LEVEL_SHIFT
;
135 module_param(debug
, int, 0);
136 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
139 * ixgb_init_module - Driver Registration Routine
141 * ixgb_init_module is the first routine called when the driver is
142 * loaded. All it does is register with the PCI subsystem.
146 ixgb_init_module(void)
148 printk(KERN_INFO
"%s - version %s\n",
149 ixgb_driver_string
, ixgb_driver_version
);
151 printk(KERN_INFO
"%s\n", ixgb_copyright
);
153 return pci_register_driver(&ixgb_driver
);
156 module_init(ixgb_init_module
);
159 * ixgb_exit_module - Driver Exit Cleanup Routine
161 * ixgb_exit_module is called just before the driver is removed
166 ixgb_exit_module(void)
168 pci_unregister_driver(&ixgb_driver
);
171 module_exit(ixgb_exit_module
);
174 * ixgb_irq_disable - Mask off interrupt generation on the NIC
175 * @adapter: board private structure
179 ixgb_irq_disable(struct ixgb_adapter
*adapter
)
181 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
182 IXGB_WRITE_FLUSH(&adapter
->hw
);
183 synchronize_irq(adapter
->pdev
->irq
);
187 * ixgb_irq_enable - Enable default interrupt generation settings
188 * @adapter: board private structure
192 ixgb_irq_enable(struct ixgb_adapter
*adapter
)
194 u32 val
= IXGB_INT_RXT0
| IXGB_INT_RXDMT0
|
195 IXGB_INT_TXDW
| IXGB_INT_LSC
;
196 if (adapter
->hw
.subsystem_vendor_id
== SUN_SUBVENDOR_ID
)
197 val
|= IXGB_INT_GPI0
;
198 IXGB_WRITE_REG(&adapter
->hw
, IMS
, val
);
199 IXGB_WRITE_FLUSH(&adapter
->hw
);
203 ixgb_up(struct ixgb_adapter
*adapter
)
205 struct net_device
*netdev
= adapter
->netdev
;
206 int err
, irq_flags
= IRQF_SHARED
;
207 int max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
208 struct ixgb_hw
*hw
= &adapter
->hw
;
210 /* hardware has been reset, we need to reload some things */
212 ixgb_rar_set(hw
, netdev
->dev_addr
, 0);
213 ixgb_set_multi(netdev
);
215 ixgb_restore_vlan(adapter
);
217 ixgb_configure_tx(adapter
);
218 ixgb_setup_rctl(adapter
);
219 ixgb_configure_rx(adapter
);
220 ixgb_alloc_rx_buffers(adapter
, IXGB_DESC_UNUSED(&adapter
->rx_ring
));
222 /* disable interrupts and get the hardware into a known state */
223 IXGB_WRITE_REG(&adapter
->hw
, IMC
, 0xffffffff);
225 /* only enable MSI if bus is in PCI-X mode */
226 if (IXGB_READ_REG(&adapter
->hw
, STATUS
) & IXGB_STATUS_PCIX_MODE
) {
227 err
= pci_enable_msi(adapter
->pdev
);
229 adapter
->have_msi
= 1;
232 /* proceed to try to request regular interrupt */
235 err
= request_irq(adapter
->pdev
->irq
, &ixgb_intr
, irq_flags
,
236 netdev
->name
, netdev
);
238 if (adapter
->have_msi
)
239 pci_disable_msi(adapter
->pdev
);
241 "Unable to allocate interrupt Error: %d\n", err
);
245 if ((hw
->max_frame_size
!= max_frame
) ||
246 (hw
->max_frame_size
!=
247 (IXGB_READ_REG(hw
, MFS
) >> IXGB_MFS_SHIFT
))) {
249 hw
->max_frame_size
= max_frame
;
251 IXGB_WRITE_REG(hw
, MFS
, hw
->max_frame_size
<< IXGB_MFS_SHIFT
);
253 if (hw
->max_frame_size
>
254 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
) {
255 u32 ctrl0
= IXGB_READ_REG(hw
, CTRL0
);
257 if (!(ctrl0
& IXGB_CTRL0_JFE
)) {
258 ctrl0
|= IXGB_CTRL0_JFE
;
259 IXGB_WRITE_REG(hw
, CTRL0
, ctrl0
);
264 clear_bit(__IXGB_DOWN
, &adapter
->flags
);
266 napi_enable(&adapter
->napi
);
267 ixgb_irq_enable(adapter
);
269 mod_timer(&adapter
->watchdog_timer
, jiffies
);
275 ixgb_down(struct ixgb_adapter
*adapter
, bool kill_watchdog
)
277 struct net_device
*netdev
= adapter
->netdev
;
279 /* prevent the interrupt handler from restarting watchdog */
280 set_bit(__IXGB_DOWN
, &adapter
->flags
);
282 napi_disable(&adapter
->napi
);
283 /* waiting for NAPI to complete can re-enable interrupts */
284 ixgb_irq_disable(adapter
);
285 free_irq(adapter
->pdev
->irq
, netdev
);
287 if (adapter
->have_msi
)
288 pci_disable_msi(adapter
->pdev
);
291 del_timer_sync(&adapter
->watchdog_timer
);
293 adapter
->link_speed
= 0;
294 adapter
->link_duplex
= 0;
295 netif_carrier_off(netdev
);
296 netif_stop_queue(netdev
);
299 ixgb_clean_tx_ring(adapter
);
300 ixgb_clean_rx_ring(adapter
);
304 ixgb_reset(struct ixgb_adapter
*adapter
)
306 struct ixgb_hw
*hw
= &adapter
->hw
;
308 ixgb_adapter_stop(hw
);
309 if (!ixgb_init_hw(hw
))
310 DPRINTK(PROBE
, ERR
, "ixgb_init_hw failed.\n");
312 /* restore frame size information */
313 IXGB_WRITE_REG(hw
, MFS
, hw
->max_frame_size
<< IXGB_MFS_SHIFT
);
314 if (hw
->max_frame_size
>
315 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
) {
316 u32 ctrl0
= IXGB_READ_REG(hw
, CTRL0
);
317 if (!(ctrl0
& IXGB_CTRL0_JFE
)) {
318 ctrl0
|= IXGB_CTRL0_JFE
;
319 IXGB_WRITE_REG(hw
, CTRL0
, ctrl0
);
325 * ixgb_probe - Device Initialization Routine
326 * @pdev: PCI device information struct
327 * @ent: entry in ixgb_pci_tbl
329 * Returns 0 on success, negative on failure
331 * ixgb_probe initializes an adapter identified by a pci_dev structure.
332 * The OS initialization, configuring of the adapter private structure,
333 * and a hardware reset occur.
337 ixgb_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
339 struct net_device
*netdev
= NULL
;
340 struct ixgb_adapter
*adapter
;
341 static int cards_found
= 0;
346 err
= pci_enable_device(pdev
);
350 if (!(err
= pci_set_dma_mask(pdev
, DMA_64BIT_MASK
)) &&
351 !(err
= pci_set_consistent_dma_mask(pdev
, DMA_64BIT_MASK
))) {
354 if ((err
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
)) ||
355 (err
= pci_set_consistent_dma_mask(pdev
, DMA_32BIT_MASK
))) {
357 "ixgb: No usable DMA configuration, aborting\n");
363 err
= pci_request_regions(pdev
, ixgb_driver_name
);
365 goto err_request_regions
;
367 pci_set_master(pdev
);
369 netdev
= alloc_etherdev(sizeof(struct ixgb_adapter
));
372 goto err_alloc_etherdev
;
375 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
377 pci_set_drvdata(pdev
, netdev
);
378 adapter
= netdev_priv(netdev
);
379 adapter
->netdev
= netdev
;
380 adapter
->pdev
= pdev
;
381 adapter
->hw
.back
= adapter
;
382 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_DEBUG_LEVEL_SHIFT
);
384 adapter
->hw
.hw_addr
= ioremap(pci_resource_start(pdev
, BAR_0
),
385 pci_resource_len(pdev
, BAR_0
));
386 if (!adapter
->hw
.hw_addr
) {
391 for (i
= BAR_1
; i
<= BAR_5
; i
++) {
392 if (pci_resource_len(pdev
, i
) == 0)
394 if (pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
395 adapter
->hw
.io_base
= pci_resource_start(pdev
, i
);
400 netdev
->open
= &ixgb_open
;
401 netdev
->stop
= &ixgb_close
;
402 netdev
->hard_start_xmit
= &ixgb_xmit_frame
;
403 netdev
->get_stats
= &ixgb_get_stats
;
404 netdev
->set_multicast_list
= &ixgb_set_multi
;
405 netdev
->set_mac_address
= &ixgb_set_mac
;
406 netdev
->change_mtu
= &ixgb_change_mtu
;
407 ixgb_set_ethtool_ops(netdev
);
408 netdev
->tx_timeout
= &ixgb_tx_timeout
;
409 netdev
->watchdog_timeo
= 5 * HZ
;
410 netif_napi_add(netdev
, &adapter
->napi
, ixgb_clean
, 64);
411 netdev
->vlan_rx_register
= ixgb_vlan_rx_register
;
412 netdev
->vlan_rx_add_vid
= ixgb_vlan_rx_add_vid
;
413 netdev
->vlan_rx_kill_vid
= ixgb_vlan_rx_kill_vid
;
414 #ifdef CONFIG_NET_POLL_CONTROLLER
415 netdev
->poll_controller
= ixgb_netpoll
;
418 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
420 adapter
->bd_number
= cards_found
;
421 adapter
->link_speed
= 0;
422 adapter
->link_duplex
= 0;
424 /* setup the private structure */
426 err
= ixgb_sw_init(adapter
);
430 netdev
->features
= NETIF_F_SG
|
434 NETIF_F_HW_VLAN_FILTER
;
435 netdev
->features
|= NETIF_F_TSO
;
438 netdev
->features
|= NETIF_F_HIGHDMA
;
440 /* make sure the EEPROM is good */
442 if (!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
443 DPRINTK(PROBE
, ERR
, "The EEPROM Checksum Is Not Valid\n");
448 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
449 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
451 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
452 DPRINTK(PROBE
, ERR
, "Invalid MAC Address\n");
457 adapter
->part_num
= ixgb_get_ee_pba_number(&adapter
->hw
);
459 init_timer(&adapter
->watchdog_timer
);
460 adapter
->watchdog_timer
.function
= &ixgb_watchdog
;
461 adapter
->watchdog_timer
.data
= (unsigned long)adapter
;
463 INIT_WORK(&adapter
->tx_timeout_task
, ixgb_tx_timeout_task
);
465 strcpy(netdev
->name
, "eth%d");
466 err
= register_netdev(netdev
);
470 /* we're going to reset, so assume we have no link for now */
472 netif_carrier_off(netdev
);
473 netif_stop_queue(netdev
);
475 DPRINTK(PROBE
, INFO
, "Intel(R) PRO/10GbE Network Connection\n");
476 ixgb_check_options(adapter
);
477 /* reset the hardware with the new settings */
487 iounmap(adapter
->hw
.hw_addr
);
491 pci_release_regions(pdev
);
494 pci_disable_device(pdev
);
499 * ixgb_remove - Device Removal Routine
500 * @pdev: PCI device information struct
502 * ixgb_remove is called by the PCI subsystem to alert the driver
503 * that it should release a PCI device. The could be caused by a
504 * Hot-Plug event, or because the driver is going to be removed from
508 static void __devexit
509 ixgb_remove(struct pci_dev
*pdev
)
511 struct net_device
*netdev
= pci_get_drvdata(pdev
);
512 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
514 flush_scheduled_work();
516 unregister_netdev(netdev
);
518 iounmap(adapter
->hw
.hw_addr
);
519 pci_release_regions(pdev
);
525 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
526 * @adapter: board private structure to initialize
528 * ixgb_sw_init initializes the Adapter private data structure.
529 * Fields are initialized based on PCI device information and
530 * OS network device settings (MTU size).
534 ixgb_sw_init(struct ixgb_adapter
*adapter
)
536 struct ixgb_hw
*hw
= &adapter
->hw
;
537 struct net_device
*netdev
= adapter
->netdev
;
538 struct pci_dev
*pdev
= adapter
->pdev
;
540 /* PCI config space info */
542 hw
->vendor_id
= pdev
->vendor
;
543 hw
->device_id
= pdev
->device
;
544 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
545 hw
->subsystem_id
= pdev
->subsystem_device
;
547 hw
->max_frame_size
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
548 adapter
->rx_buffer_len
= hw
->max_frame_size
+ 8; /* + 8 for errata */
550 if ((hw
->device_id
== IXGB_DEVICE_ID_82597EX
)
551 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_CX4
)
552 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_LR
)
553 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_SR
))
554 hw
->mac_type
= ixgb_82597
;
556 /* should never have loaded on this device */
557 DPRINTK(PROBE
, ERR
, "unsupported device id\n");
560 /* enable flow control to be programmed */
563 set_bit(__IXGB_DOWN
, &adapter
->flags
);
568 * ixgb_open - Called when a network interface is made active
569 * @netdev: network interface device structure
571 * Returns 0 on success, negative value on failure
573 * The open entry point is called when a network interface is made
574 * active by the system (IFF_UP). At this point all resources needed
575 * for transmit and receive operations are allocated, the interrupt
576 * handler is registered with the OS, the watchdog timer is started,
577 * and the stack is notified that the interface is ready.
581 ixgb_open(struct net_device
*netdev
)
583 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
586 /* allocate transmit descriptors */
587 err
= ixgb_setup_tx_resources(adapter
);
591 /* allocate receive descriptors */
593 err
= ixgb_setup_rx_resources(adapter
);
597 err
= ixgb_up(adapter
);
604 ixgb_free_rx_resources(adapter
);
606 ixgb_free_tx_resources(adapter
);
614 * ixgb_close - Disables a network interface
615 * @netdev: network interface device structure
617 * Returns 0, this is not allowed to fail
619 * The close entry point is called when an interface is de-activated
620 * by the OS. The hardware is still under the drivers control, but
621 * needs to be disabled. A global MAC reset is issued to stop the
622 * hardware, and all transmit and receive resources are freed.
626 ixgb_close(struct net_device
*netdev
)
628 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
630 ixgb_down(adapter
, true);
632 ixgb_free_tx_resources(adapter
);
633 ixgb_free_rx_resources(adapter
);
639 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
640 * @adapter: board private structure
642 * Return 0 on success, negative on failure
646 ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
)
648 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
649 struct pci_dev
*pdev
= adapter
->pdev
;
652 size
= sizeof(struct ixgb_buffer
) * txdr
->count
;
653 txdr
->buffer_info
= vmalloc(size
);
654 if (!txdr
->buffer_info
) {
656 "Unable to allocate transmit descriptor ring memory\n");
659 memset(txdr
->buffer_info
, 0, size
);
661 /* round up to nearest 4K */
663 txdr
->size
= txdr
->count
* sizeof(struct ixgb_tx_desc
);
664 txdr
->size
= ALIGN(txdr
->size
, 4096);
666 txdr
->desc
= pci_alloc_consistent(pdev
, txdr
->size
, &txdr
->dma
);
668 vfree(txdr
->buffer_info
);
670 "Unable to allocate transmit descriptor memory\n");
673 memset(txdr
->desc
, 0, txdr
->size
);
675 txdr
->next_to_use
= 0;
676 txdr
->next_to_clean
= 0;
682 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
683 * @adapter: board private structure
685 * Configure the Tx unit of the MAC after a reset.
689 ixgb_configure_tx(struct ixgb_adapter
*adapter
)
691 u64 tdba
= adapter
->tx_ring
.dma
;
692 u32 tdlen
= adapter
->tx_ring
.count
* sizeof(struct ixgb_tx_desc
);
694 struct ixgb_hw
*hw
= &adapter
->hw
;
696 /* Setup the Base and Length of the Tx Descriptor Ring
697 * tx_ring.dma can be either a 32 or 64 bit value
700 IXGB_WRITE_REG(hw
, TDBAL
, (tdba
& 0x00000000ffffffffULL
));
701 IXGB_WRITE_REG(hw
, TDBAH
, (tdba
>> 32));
703 IXGB_WRITE_REG(hw
, TDLEN
, tdlen
);
705 /* Setup the HW Tx Head and Tail descriptor pointers */
707 IXGB_WRITE_REG(hw
, TDH
, 0);
708 IXGB_WRITE_REG(hw
, TDT
, 0);
710 /* don't set up txdctl, it induces performance problems if configured
712 /* Set the Tx Interrupt Delay register */
714 IXGB_WRITE_REG(hw
, TIDV
, adapter
->tx_int_delay
);
716 /* Program the Transmit Control Register */
718 tctl
= IXGB_TCTL_TCE
| IXGB_TCTL_TXEN
| IXGB_TCTL_TPDE
;
719 IXGB_WRITE_REG(hw
, TCTL
, tctl
);
721 /* Setup Transmit Descriptor Settings for this adapter */
722 adapter
->tx_cmd_type
=
724 (adapter
->tx_int_delay_enable
? IXGB_TX_DESC_CMD_IDE
: 0);
728 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
729 * @adapter: board private structure
731 * Returns 0 on success, negative on failure
735 ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
)
737 struct ixgb_desc_ring
*rxdr
= &adapter
->rx_ring
;
738 struct pci_dev
*pdev
= adapter
->pdev
;
741 size
= sizeof(struct ixgb_buffer
) * rxdr
->count
;
742 rxdr
->buffer_info
= vmalloc(size
);
743 if (!rxdr
->buffer_info
) {
745 "Unable to allocate receive descriptor ring\n");
748 memset(rxdr
->buffer_info
, 0, size
);
750 /* Round up to nearest 4K */
752 rxdr
->size
= rxdr
->count
* sizeof(struct ixgb_rx_desc
);
753 rxdr
->size
= ALIGN(rxdr
->size
, 4096);
755 rxdr
->desc
= pci_alloc_consistent(pdev
, rxdr
->size
, &rxdr
->dma
);
758 vfree(rxdr
->buffer_info
);
760 "Unable to allocate receive descriptors\n");
763 memset(rxdr
->desc
, 0, rxdr
->size
);
765 rxdr
->next_to_clean
= 0;
766 rxdr
->next_to_use
= 0;
772 * ixgb_setup_rctl - configure the receive control register
773 * @adapter: Board private structure
777 ixgb_setup_rctl(struct ixgb_adapter
*adapter
)
781 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
783 rctl
&= ~(3 << IXGB_RCTL_MO_SHIFT
);
786 IXGB_RCTL_BAM
| IXGB_RCTL_RDMTS_1_2
|
787 IXGB_RCTL_RXEN
| IXGB_RCTL_CFF
|
788 (adapter
->hw
.mc_filter_type
<< IXGB_RCTL_MO_SHIFT
);
790 rctl
|= IXGB_RCTL_SECRC
;
792 if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_2048
)
793 rctl
|= IXGB_RCTL_BSIZE_2048
;
794 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_4096
)
795 rctl
|= IXGB_RCTL_BSIZE_4096
;
796 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_8192
)
797 rctl
|= IXGB_RCTL_BSIZE_8192
;
798 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_16384
)
799 rctl
|= IXGB_RCTL_BSIZE_16384
;
801 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
805 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
806 * @adapter: board private structure
808 * Configure the Rx unit of the MAC after a reset.
812 ixgb_configure_rx(struct ixgb_adapter
*adapter
)
814 u64 rdba
= adapter
->rx_ring
.dma
;
815 u32 rdlen
= adapter
->rx_ring
.count
* sizeof(struct ixgb_rx_desc
);
816 struct ixgb_hw
*hw
= &adapter
->hw
;
820 /* make sure receives are disabled while setting up the descriptors */
822 rctl
= IXGB_READ_REG(hw
, RCTL
);
823 IXGB_WRITE_REG(hw
, RCTL
, rctl
& ~IXGB_RCTL_RXEN
);
825 /* set the Receive Delay Timer Register */
827 IXGB_WRITE_REG(hw
, RDTR
, adapter
->rx_int_delay
);
829 /* Setup the Base and Length of the Rx Descriptor Ring */
831 IXGB_WRITE_REG(hw
, RDBAL
, (rdba
& 0x00000000ffffffffULL
));
832 IXGB_WRITE_REG(hw
, RDBAH
, (rdba
>> 32));
834 IXGB_WRITE_REG(hw
, RDLEN
, rdlen
);
836 /* Setup the HW Rx Head and Tail Descriptor Pointers */
837 IXGB_WRITE_REG(hw
, RDH
, 0);
838 IXGB_WRITE_REG(hw
, RDT
, 0);
840 /* due to the hardware errata with RXDCTL, we are unable to use any of
841 * the performance enhancing features of it without causing other
842 * subtle bugs, some of the bugs could include receive length
843 * corruption at high data rates (WTHRESH > 0) and/or receive
844 * descriptor ring irregularites (particularly in hardware cache) */
845 IXGB_WRITE_REG(hw
, RXDCTL
, 0);
847 /* Enable Receive Checksum Offload for TCP and UDP */
848 if (adapter
->rx_csum
) {
849 rxcsum
= IXGB_READ_REG(hw
, RXCSUM
);
850 rxcsum
|= IXGB_RXCSUM_TUOFL
;
851 IXGB_WRITE_REG(hw
, RXCSUM
, rxcsum
);
854 /* Enable Receives */
856 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
860 * ixgb_free_tx_resources - Free Tx Resources
861 * @adapter: board private structure
863 * Free all transmit software resources
867 ixgb_free_tx_resources(struct ixgb_adapter
*adapter
)
869 struct pci_dev
*pdev
= adapter
->pdev
;
871 ixgb_clean_tx_ring(adapter
);
873 vfree(adapter
->tx_ring
.buffer_info
);
874 adapter
->tx_ring
.buffer_info
= NULL
;
876 pci_free_consistent(pdev
, adapter
->tx_ring
.size
,
877 adapter
->tx_ring
.desc
, adapter
->tx_ring
.dma
);
879 adapter
->tx_ring
.desc
= NULL
;
883 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter
*adapter
,
884 struct ixgb_buffer
*buffer_info
)
886 struct pci_dev
*pdev
= adapter
->pdev
;
888 if (buffer_info
->dma
)
889 pci_unmap_page(pdev
, buffer_info
->dma
, buffer_info
->length
,
892 /* okay to call kfree_skb here instead of kfree_skb_any because
893 * this is never called in interrupt context */
894 if (buffer_info
->skb
)
895 dev_kfree_skb(buffer_info
->skb
);
897 buffer_info
->skb
= NULL
;
898 buffer_info
->dma
= 0;
899 buffer_info
->time_stamp
= 0;
900 /* these fields must always be initialized in tx
901 * buffer_info->length = 0;
902 * buffer_info->next_to_watch = 0; */
906 * ixgb_clean_tx_ring - Free Tx Buffers
907 * @adapter: board private structure
911 ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
)
913 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
914 struct ixgb_buffer
*buffer_info
;
918 /* Free all the Tx ring sk_buffs */
920 for (i
= 0; i
< tx_ring
->count
; i
++) {
921 buffer_info
= &tx_ring
->buffer_info
[i
];
922 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
925 size
= sizeof(struct ixgb_buffer
) * tx_ring
->count
;
926 memset(tx_ring
->buffer_info
, 0, size
);
928 /* Zero out the descriptor ring */
930 memset(tx_ring
->desc
, 0, tx_ring
->size
);
932 tx_ring
->next_to_use
= 0;
933 tx_ring
->next_to_clean
= 0;
935 IXGB_WRITE_REG(&adapter
->hw
, TDH
, 0);
936 IXGB_WRITE_REG(&adapter
->hw
, TDT
, 0);
940 * ixgb_free_rx_resources - Free Rx Resources
941 * @adapter: board private structure
943 * Free all receive software resources
947 ixgb_free_rx_resources(struct ixgb_adapter
*adapter
)
949 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
950 struct pci_dev
*pdev
= adapter
->pdev
;
952 ixgb_clean_rx_ring(adapter
);
954 vfree(rx_ring
->buffer_info
);
955 rx_ring
->buffer_info
= NULL
;
957 pci_free_consistent(pdev
, rx_ring
->size
, rx_ring
->desc
, rx_ring
->dma
);
959 rx_ring
->desc
= NULL
;
963 * ixgb_clean_rx_ring - Free Rx Buffers
964 * @adapter: board private structure
968 ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
)
970 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
971 struct ixgb_buffer
*buffer_info
;
972 struct pci_dev
*pdev
= adapter
->pdev
;
976 /* Free all the Rx ring sk_buffs */
978 for (i
= 0; i
< rx_ring
->count
; i
++) {
979 buffer_info
= &rx_ring
->buffer_info
[i
];
980 if (buffer_info
->dma
) {
981 pci_unmap_single(pdev
,
985 buffer_info
->dma
= 0;
986 buffer_info
->length
= 0;
989 if (buffer_info
->skb
) {
990 dev_kfree_skb(buffer_info
->skb
);
991 buffer_info
->skb
= NULL
;
995 size
= sizeof(struct ixgb_buffer
) * rx_ring
->count
;
996 memset(rx_ring
->buffer_info
, 0, size
);
998 /* Zero out the descriptor ring */
1000 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1002 rx_ring
->next_to_clean
= 0;
1003 rx_ring
->next_to_use
= 0;
1005 IXGB_WRITE_REG(&adapter
->hw
, RDH
, 0);
1006 IXGB_WRITE_REG(&adapter
->hw
, RDT
, 0);
1010 * ixgb_set_mac - Change the Ethernet Address of the NIC
1011 * @netdev: network interface device structure
1012 * @p: pointer to an address structure
1014 * Returns 0 on success, negative on failure
1018 ixgb_set_mac(struct net_device
*netdev
, void *p
)
1020 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1021 struct sockaddr
*addr
= p
;
1023 if (!is_valid_ether_addr(addr
->sa_data
))
1024 return -EADDRNOTAVAIL
;
1026 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1028 ixgb_rar_set(&adapter
->hw
, addr
->sa_data
, 0);
1034 * ixgb_set_multi - Multicast and Promiscuous mode set
1035 * @netdev: network interface device structure
1037 * The set_multi entry point is called whenever the multicast address
1038 * list or the network interface flags are updated. This routine is
1039 * responsible for configuring the hardware for proper multicast,
1040 * promiscuous mode, and all-multi behavior.
1044 ixgb_set_multi(struct net_device
*netdev
)
1046 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1047 struct ixgb_hw
*hw
= &adapter
->hw
;
1048 struct dev_mc_list
*mc_ptr
;
1052 /* Check for Promiscuous and All Multicast modes */
1054 rctl
= IXGB_READ_REG(hw
, RCTL
);
1056 if (netdev
->flags
& IFF_PROMISC
) {
1057 rctl
|= (IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1058 rctl
&= ~IXGB_RCTL_VFE
;
1060 if (netdev
->flags
& IFF_ALLMULTI
) {
1061 rctl
|= IXGB_RCTL_MPE
;
1062 rctl
&= ~IXGB_RCTL_UPE
;
1064 rctl
&= ~(IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1066 rctl
|= IXGB_RCTL_VFE
;
1069 if (netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
) {
1070 rctl
|= IXGB_RCTL_MPE
;
1071 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1073 u8 mta
[IXGB_MAX_NUM_MULTICAST_ADDRESSES
*
1074 IXGB_ETH_LENGTH_OF_ADDRESS
];
1076 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1078 for (i
= 0, mc_ptr
= netdev
->mc_list
;
1080 i
++, mc_ptr
= mc_ptr
->next
)
1081 memcpy(&mta
[i
* IXGB_ETH_LENGTH_OF_ADDRESS
],
1082 mc_ptr
->dmi_addr
, IXGB_ETH_LENGTH_OF_ADDRESS
);
1084 ixgb_mc_addr_list_update(hw
, mta
, netdev
->mc_count
, 0);
1089 * ixgb_watchdog - Timer Call-back
1090 * @data: pointer to netdev cast into an unsigned long
1094 ixgb_watchdog(unsigned long data
)
1096 struct ixgb_adapter
*adapter
= (struct ixgb_adapter
*)data
;
1097 struct net_device
*netdev
= adapter
->netdev
;
1098 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
1100 ixgb_check_for_link(&adapter
->hw
);
1102 if (ixgb_check_for_bad_link(&adapter
->hw
)) {
1103 /* force the reset path */
1104 netif_stop_queue(netdev
);
1107 if (adapter
->hw
.link_up
) {
1108 if (!netif_carrier_ok(netdev
)) {
1110 "NIC Link is Up 10000 Mbps Full Duplex\n");
1111 adapter
->link_speed
= 10000;
1112 adapter
->link_duplex
= FULL_DUPLEX
;
1113 netif_carrier_on(netdev
);
1114 netif_wake_queue(netdev
);
1117 if (netif_carrier_ok(netdev
)) {
1118 adapter
->link_speed
= 0;
1119 adapter
->link_duplex
= 0;
1120 DPRINTK(LINK
, INFO
, "NIC Link is Down\n");
1121 netif_carrier_off(netdev
);
1122 netif_stop_queue(netdev
);
1127 ixgb_update_stats(adapter
);
1129 if (!netif_carrier_ok(netdev
)) {
1130 if (IXGB_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
1131 /* We've lost link, so the controller stops DMA,
1132 * but we've got queued Tx work that's never going
1133 * to get done, so reset controller to flush Tx.
1134 * (Do the reset outside of interrupt context). */
1135 schedule_work(&adapter
->tx_timeout_task
);
1139 /* Force detection of hung controller every watchdog period */
1140 adapter
->detect_tx_hung
= true;
1142 /* generate an interrupt to force clean up of any stragglers */
1143 IXGB_WRITE_REG(&adapter
->hw
, ICS
, IXGB_INT_TXDW
);
1145 /* Reset the timer */
1146 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 2 * HZ
);
1149 #define IXGB_TX_FLAGS_CSUM 0x00000001
1150 #define IXGB_TX_FLAGS_VLAN 0x00000002
1151 #define IXGB_TX_FLAGS_TSO 0x00000004
1154 ixgb_tso(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1156 struct ixgb_context_desc
*context_desc
;
1158 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
1159 u16 ipcse
, tucse
, mss
;
1162 if (likely(skb_is_gso(skb
))) {
1163 struct ixgb_buffer
*buffer_info
;
1166 if (skb_header_cloned(skb
)) {
1167 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
1172 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
1173 mss
= skb_shinfo(skb
)->gso_size
;
1177 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
1180 ipcss
= skb_network_offset(skb
);
1181 ipcso
= (void *)&(iph
->check
) - (void *)skb
->data
;
1182 ipcse
= skb_transport_offset(skb
) - 1;
1183 tucss
= skb_transport_offset(skb
);
1184 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
1187 i
= adapter
->tx_ring
.next_to_use
;
1188 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1189 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1190 WARN_ON(buffer_info
->dma
!= 0);
1192 context_desc
->ipcss
= ipcss
;
1193 context_desc
->ipcso
= ipcso
;
1194 context_desc
->ipcse
= cpu_to_le16(ipcse
);
1195 context_desc
->tucss
= tucss
;
1196 context_desc
->tucso
= tucso
;
1197 context_desc
->tucse
= cpu_to_le16(tucse
);
1198 context_desc
->mss
= cpu_to_le16(mss
);
1199 context_desc
->hdr_len
= hdr_len
;
1200 context_desc
->status
= 0;
1201 context_desc
->cmd_type_len
= cpu_to_le32(
1202 IXGB_CONTEXT_DESC_TYPE
1203 | IXGB_CONTEXT_DESC_CMD_TSE
1204 | IXGB_CONTEXT_DESC_CMD_IP
1205 | IXGB_CONTEXT_DESC_CMD_TCP
1206 | IXGB_CONTEXT_DESC_CMD_IDE
1207 | (skb
->len
- (hdr_len
)));
1210 if (++i
== adapter
->tx_ring
.count
) i
= 0;
1211 adapter
->tx_ring
.next_to_use
= i
;
1220 ixgb_tx_csum(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1222 struct ixgb_context_desc
*context_desc
;
1226 if (likely(skb
->ip_summed
== CHECKSUM_PARTIAL
)) {
1227 struct ixgb_buffer
*buffer_info
;
1228 css
= skb_transport_offset(skb
);
1229 cso
= css
+ skb
->csum_offset
;
1231 i
= adapter
->tx_ring
.next_to_use
;
1232 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1233 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1234 WARN_ON(buffer_info
->dma
!= 0);
1236 context_desc
->tucss
= css
;
1237 context_desc
->tucso
= cso
;
1238 context_desc
->tucse
= 0;
1239 /* zero out any previously existing data in one instruction */
1240 *(u32
*)&(context_desc
->ipcss
) = 0;
1241 context_desc
->status
= 0;
1242 context_desc
->hdr_len
= 0;
1243 context_desc
->mss
= 0;
1244 context_desc
->cmd_type_len
=
1245 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1246 | IXGB_TX_DESC_CMD_IDE
);
1248 if (++i
== adapter
->tx_ring
.count
) i
= 0;
1249 adapter
->tx_ring
.next_to_use
= i
;
1257 #define IXGB_MAX_TXD_PWR 14
1258 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1261 ixgb_tx_map(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
,
1264 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1265 struct ixgb_buffer
*buffer_info
;
1267 unsigned int offset
= 0, size
, count
= 0, i
;
1268 unsigned int mss
= skb_shinfo(skb
)->gso_size
;
1270 unsigned int nr_frags
= skb_shinfo(skb
)->nr_frags
;
1273 len
-= skb
->data_len
;
1275 i
= tx_ring
->next_to_use
;
1278 buffer_info
= &tx_ring
->buffer_info
[i
];
1279 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1280 /* Workaround for premature desc write-backs
1281 * in TSO mode. Append 4-byte sentinel desc */
1282 if (unlikely(mss
&& !nr_frags
&& size
== len
&& size
> 8))
1285 buffer_info
->length
= size
;
1286 WARN_ON(buffer_info
->dma
!= 0);
1287 buffer_info
->time_stamp
= jiffies
;
1289 pci_map_single(adapter
->pdev
,
1293 buffer_info
->next_to_watch
= 0;
1298 if (++i
== tx_ring
->count
) i
= 0;
1301 for (f
= 0; f
< nr_frags
; f
++) {
1302 struct skb_frag_struct
*frag
;
1304 frag
= &skb_shinfo(skb
)->frags
[f
];
1309 buffer_info
= &tx_ring
->buffer_info
[i
];
1310 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1312 /* Workaround for premature desc write-backs
1313 * in TSO mode. Append 4-byte sentinel desc */
1314 if (unlikely(mss
&& (f
== (nr_frags
- 1))
1315 && size
== len
&& size
> 8))
1318 buffer_info
->length
= size
;
1319 buffer_info
->time_stamp
= jiffies
;
1321 pci_map_page(adapter
->pdev
,
1323 frag
->page_offset
+ offset
,
1326 buffer_info
->next_to_watch
= 0;
1331 if (++i
== tx_ring
->count
) i
= 0;
1334 i
= (i
== 0) ? tx_ring
->count
- 1 : i
- 1;
1335 tx_ring
->buffer_info
[i
].skb
= skb
;
1336 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
1342 ixgb_tx_queue(struct ixgb_adapter
*adapter
, int count
, int vlan_id
,int tx_flags
)
1344 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1345 struct ixgb_tx_desc
*tx_desc
= NULL
;
1346 struct ixgb_buffer
*buffer_info
;
1347 u32 cmd_type_len
= adapter
->tx_cmd_type
;
1352 if (tx_flags
& IXGB_TX_FLAGS_TSO
) {
1353 cmd_type_len
|= IXGB_TX_DESC_CMD_TSE
;
1354 popts
|= (IXGB_TX_DESC_POPTS_IXSM
| IXGB_TX_DESC_POPTS_TXSM
);
1357 if (tx_flags
& IXGB_TX_FLAGS_CSUM
)
1358 popts
|= IXGB_TX_DESC_POPTS_TXSM
;
1360 if (tx_flags
& IXGB_TX_FLAGS_VLAN
)
1361 cmd_type_len
|= IXGB_TX_DESC_CMD_VLE
;
1363 i
= tx_ring
->next_to_use
;
1366 buffer_info
= &tx_ring
->buffer_info
[i
];
1367 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1368 tx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
1369 tx_desc
->cmd_type_len
=
1370 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
1371 tx_desc
->status
= status
;
1372 tx_desc
->popts
= popts
;
1373 tx_desc
->vlan
= cpu_to_le16(vlan_id
);
1375 if (++i
== tx_ring
->count
) i
= 0;
1378 tx_desc
->cmd_type_len
|=
1379 cpu_to_le32(IXGB_TX_DESC_CMD_EOP
| IXGB_TX_DESC_CMD_RS
);
1381 /* Force memory writes to complete before letting h/w
1382 * know there are new descriptors to fetch. (Only
1383 * applicable for weak-ordered memory model archs,
1384 * such as IA-64). */
1387 tx_ring
->next_to_use
= i
;
1388 IXGB_WRITE_REG(&adapter
->hw
, TDT
, i
);
1391 static int __ixgb_maybe_stop_tx(struct net_device
*netdev
, int size
)
1393 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1394 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1396 netif_stop_queue(netdev
);
1397 /* Herbert's original patch had:
1398 * smp_mb__after_netif_stop_queue();
1399 * but since that doesn't exist yet, just open code it. */
1402 /* We need to check again in a case another CPU has just
1403 * made room available. */
1404 if (likely(IXGB_DESC_UNUSED(tx_ring
) < size
))
1408 netif_start_queue(netdev
);
1409 ++adapter
->restart_queue
;
1413 static int ixgb_maybe_stop_tx(struct net_device
*netdev
,
1414 struct ixgb_desc_ring
*tx_ring
, int size
)
1416 if (likely(IXGB_DESC_UNUSED(tx_ring
) >= size
))
1418 return __ixgb_maybe_stop_tx(netdev
, size
);
1422 /* Tx Descriptors needed, worst case */
1423 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1424 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1425 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1426 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1427 + 1 /* one more needed for sentinel TSO workaround */
1430 ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
1432 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1434 unsigned int tx_flags
= 0;
1438 if (test_bit(__IXGB_DOWN
, &adapter
->flags
)) {
1440 return NETDEV_TX_OK
;
1443 if (skb
->len
<= 0) {
1448 if (unlikely(ixgb_maybe_stop_tx(netdev
, &adapter
->tx_ring
,
1450 return NETDEV_TX_BUSY
;
1452 if (adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
1453 tx_flags
|= IXGB_TX_FLAGS_VLAN
;
1454 vlan_id
= vlan_tx_tag_get(skb
);
1457 first
= adapter
->tx_ring
.next_to_use
;
1459 tso
= ixgb_tso(adapter
, skb
);
1462 return NETDEV_TX_OK
;
1466 tx_flags
|= IXGB_TX_FLAGS_TSO
;
1467 else if (ixgb_tx_csum(adapter
, skb
))
1468 tx_flags
|= IXGB_TX_FLAGS_CSUM
;
1470 ixgb_tx_queue(adapter
, ixgb_tx_map(adapter
, skb
, first
), vlan_id
,
1473 netdev
->trans_start
= jiffies
;
1475 /* Make sure there is space in the ring for the next send. */
1476 ixgb_maybe_stop_tx(netdev
, &adapter
->tx_ring
, DESC_NEEDED
);
1478 return NETDEV_TX_OK
;
1482 * ixgb_tx_timeout - Respond to a Tx Hang
1483 * @netdev: network interface device structure
1487 ixgb_tx_timeout(struct net_device
*netdev
)
1489 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1491 /* Do the reset outside of interrupt context */
1492 schedule_work(&adapter
->tx_timeout_task
);
1496 ixgb_tx_timeout_task(struct work_struct
*work
)
1498 struct ixgb_adapter
*adapter
=
1499 container_of(work
, struct ixgb_adapter
, tx_timeout_task
);
1501 adapter
->tx_timeout_count
++;
1502 ixgb_down(adapter
, true);
1507 * ixgb_get_stats - Get System Network Statistics
1508 * @netdev: network interface device structure
1510 * Returns the address of the device statistics structure.
1511 * The statistics are actually updated from the timer callback.
1514 static struct net_device_stats
*
1515 ixgb_get_stats(struct net_device
*netdev
)
1517 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1519 return &adapter
->net_stats
;
1523 * ixgb_change_mtu - Change the Maximum Transfer Unit
1524 * @netdev: network interface device structure
1525 * @new_mtu: new value for maximum frame size
1527 * Returns 0 on success, negative on failure
1531 ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
)
1533 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1534 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1535 int old_max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1537 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1538 if ((new_mtu
< 68) ||
1539 (max_frame
> IXGB_MAX_JUMBO_FRAME_SIZE
+ ENET_FCS_LENGTH
)) {
1540 DPRINTK(PROBE
, ERR
, "Invalid MTU setting %d\n", new_mtu
);
1544 if (old_max_frame
== max_frame
)
1547 if (netif_running(netdev
))
1548 ixgb_down(adapter
, true);
1550 adapter
->rx_buffer_len
= max_frame
+ 8; /* + 8 for errata */
1552 netdev
->mtu
= new_mtu
;
1554 if (netif_running(netdev
))
1561 * ixgb_update_stats - Update the board statistics counters.
1562 * @adapter: board private structure
1566 ixgb_update_stats(struct ixgb_adapter
*adapter
)
1568 struct net_device
*netdev
= adapter
->netdev
;
1569 struct pci_dev
*pdev
= adapter
->pdev
;
1571 /* Prevent stats update while adapter is being reset */
1572 if (pci_channel_offline(pdev
))
1575 if ((netdev
->flags
& IFF_PROMISC
) || (netdev
->flags
& IFF_ALLMULTI
) ||
1576 (netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
)) {
1577 u64 multi
= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1578 u32 bcast_l
= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1579 u32 bcast_h
= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1580 u64 bcast
= ((u64
)bcast_h
<< 32) | bcast_l
;
1582 multi
|= ((u64
)IXGB_READ_REG(&adapter
->hw
, MPRCH
) << 32);
1583 /* fix up multicast stats by removing broadcasts */
1587 adapter
->stats
.mprcl
+= (multi
& 0xFFFFFFFF);
1588 adapter
->stats
.mprch
+= (multi
>> 32);
1589 adapter
->stats
.bprcl
+= bcast_l
;
1590 adapter
->stats
.bprch
+= bcast_h
;
1592 adapter
->stats
.mprcl
+= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1593 adapter
->stats
.mprch
+= IXGB_READ_REG(&adapter
->hw
, MPRCH
);
1594 adapter
->stats
.bprcl
+= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1595 adapter
->stats
.bprch
+= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1597 adapter
->stats
.tprl
+= IXGB_READ_REG(&adapter
->hw
, TPRL
);
1598 adapter
->stats
.tprh
+= IXGB_READ_REG(&adapter
->hw
, TPRH
);
1599 adapter
->stats
.gprcl
+= IXGB_READ_REG(&adapter
->hw
, GPRCL
);
1600 adapter
->stats
.gprch
+= IXGB_READ_REG(&adapter
->hw
, GPRCH
);
1601 adapter
->stats
.uprcl
+= IXGB_READ_REG(&adapter
->hw
, UPRCL
);
1602 adapter
->stats
.uprch
+= IXGB_READ_REG(&adapter
->hw
, UPRCH
);
1603 adapter
->stats
.vprcl
+= IXGB_READ_REG(&adapter
->hw
, VPRCL
);
1604 adapter
->stats
.vprch
+= IXGB_READ_REG(&adapter
->hw
, VPRCH
);
1605 adapter
->stats
.jprcl
+= IXGB_READ_REG(&adapter
->hw
, JPRCL
);
1606 adapter
->stats
.jprch
+= IXGB_READ_REG(&adapter
->hw
, JPRCH
);
1607 adapter
->stats
.gorcl
+= IXGB_READ_REG(&adapter
->hw
, GORCL
);
1608 adapter
->stats
.gorch
+= IXGB_READ_REG(&adapter
->hw
, GORCH
);
1609 adapter
->stats
.torl
+= IXGB_READ_REG(&adapter
->hw
, TORL
);
1610 adapter
->stats
.torh
+= IXGB_READ_REG(&adapter
->hw
, TORH
);
1611 adapter
->stats
.rnbc
+= IXGB_READ_REG(&adapter
->hw
, RNBC
);
1612 adapter
->stats
.ruc
+= IXGB_READ_REG(&adapter
->hw
, RUC
);
1613 adapter
->stats
.roc
+= IXGB_READ_REG(&adapter
->hw
, ROC
);
1614 adapter
->stats
.rlec
+= IXGB_READ_REG(&adapter
->hw
, RLEC
);
1615 adapter
->stats
.crcerrs
+= IXGB_READ_REG(&adapter
->hw
, CRCERRS
);
1616 adapter
->stats
.icbc
+= IXGB_READ_REG(&adapter
->hw
, ICBC
);
1617 adapter
->stats
.ecbc
+= IXGB_READ_REG(&adapter
->hw
, ECBC
);
1618 adapter
->stats
.mpc
+= IXGB_READ_REG(&adapter
->hw
, MPC
);
1619 adapter
->stats
.tptl
+= IXGB_READ_REG(&adapter
->hw
, TPTL
);
1620 adapter
->stats
.tpth
+= IXGB_READ_REG(&adapter
->hw
, TPTH
);
1621 adapter
->stats
.gptcl
+= IXGB_READ_REG(&adapter
->hw
, GPTCL
);
1622 adapter
->stats
.gptch
+= IXGB_READ_REG(&adapter
->hw
, GPTCH
);
1623 adapter
->stats
.bptcl
+= IXGB_READ_REG(&adapter
->hw
, BPTCL
);
1624 adapter
->stats
.bptch
+= IXGB_READ_REG(&adapter
->hw
, BPTCH
);
1625 adapter
->stats
.mptcl
+= IXGB_READ_REG(&adapter
->hw
, MPTCL
);
1626 adapter
->stats
.mptch
+= IXGB_READ_REG(&adapter
->hw
, MPTCH
);
1627 adapter
->stats
.uptcl
+= IXGB_READ_REG(&adapter
->hw
, UPTCL
);
1628 adapter
->stats
.uptch
+= IXGB_READ_REG(&adapter
->hw
, UPTCH
);
1629 adapter
->stats
.vptcl
+= IXGB_READ_REG(&adapter
->hw
, VPTCL
);
1630 adapter
->stats
.vptch
+= IXGB_READ_REG(&adapter
->hw
, VPTCH
);
1631 adapter
->stats
.jptcl
+= IXGB_READ_REG(&adapter
->hw
, JPTCL
);
1632 adapter
->stats
.jptch
+= IXGB_READ_REG(&adapter
->hw
, JPTCH
);
1633 adapter
->stats
.gotcl
+= IXGB_READ_REG(&adapter
->hw
, GOTCL
);
1634 adapter
->stats
.gotch
+= IXGB_READ_REG(&adapter
->hw
, GOTCH
);
1635 adapter
->stats
.totl
+= IXGB_READ_REG(&adapter
->hw
, TOTL
);
1636 adapter
->stats
.toth
+= IXGB_READ_REG(&adapter
->hw
, TOTH
);
1637 adapter
->stats
.dc
+= IXGB_READ_REG(&adapter
->hw
, DC
);
1638 adapter
->stats
.plt64c
+= IXGB_READ_REG(&adapter
->hw
, PLT64C
);
1639 adapter
->stats
.tsctc
+= IXGB_READ_REG(&adapter
->hw
, TSCTC
);
1640 adapter
->stats
.tsctfc
+= IXGB_READ_REG(&adapter
->hw
, TSCTFC
);
1641 adapter
->stats
.ibic
+= IXGB_READ_REG(&adapter
->hw
, IBIC
);
1642 adapter
->stats
.rfc
+= IXGB_READ_REG(&adapter
->hw
, RFC
);
1643 adapter
->stats
.lfc
+= IXGB_READ_REG(&adapter
->hw
, LFC
);
1644 adapter
->stats
.pfrc
+= IXGB_READ_REG(&adapter
->hw
, PFRC
);
1645 adapter
->stats
.pftc
+= IXGB_READ_REG(&adapter
->hw
, PFTC
);
1646 adapter
->stats
.mcfrc
+= IXGB_READ_REG(&adapter
->hw
, MCFRC
);
1647 adapter
->stats
.mcftc
+= IXGB_READ_REG(&adapter
->hw
, MCFTC
);
1648 adapter
->stats
.xonrxc
+= IXGB_READ_REG(&adapter
->hw
, XONRXC
);
1649 adapter
->stats
.xontxc
+= IXGB_READ_REG(&adapter
->hw
, XONTXC
);
1650 adapter
->stats
.xoffrxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFRXC
);
1651 adapter
->stats
.xofftxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFTXC
);
1652 adapter
->stats
.rjc
+= IXGB_READ_REG(&adapter
->hw
, RJC
);
1654 /* Fill out the OS statistics structure */
1656 adapter
->net_stats
.rx_packets
= adapter
->stats
.gprcl
;
1657 adapter
->net_stats
.tx_packets
= adapter
->stats
.gptcl
;
1658 adapter
->net_stats
.rx_bytes
= adapter
->stats
.gorcl
;
1659 adapter
->net_stats
.tx_bytes
= adapter
->stats
.gotcl
;
1660 adapter
->net_stats
.multicast
= adapter
->stats
.mprcl
;
1661 adapter
->net_stats
.collisions
= 0;
1663 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1664 * with a length in the type/len field */
1665 adapter
->net_stats
.rx_errors
=
1666 /* adapter->stats.rnbc + */ adapter
->stats
.crcerrs
+
1667 adapter
->stats
.ruc
+
1668 adapter
->stats
.roc
/*+ adapter->stats.rlec */ +
1669 adapter
->stats
.icbc
+
1670 adapter
->stats
.ecbc
+ adapter
->stats
.mpc
;
1673 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1676 adapter
->net_stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
1677 adapter
->net_stats
.rx_fifo_errors
= adapter
->stats
.mpc
;
1678 adapter
->net_stats
.rx_missed_errors
= adapter
->stats
.mpc
;
1679 adapter
->net_stats
.rx_over_errors
= adapter
->stats
.mpc
;
1681 adapter
->net_stats
.tx_errors
= 0;
1682 adapter
->net_stats
.rx_frame_errors
= 0;
1683 adapter
->net_stats
.tx_aborted_errors
= 0;
1684 adapter
->net_stats
.tx_carrier_errors
= 0;
1685 adapter
->net_stats
.tx_fifo_errors
= 0;
1686 adapter
->net_stats
.tx_heartbeat_errors
= 0;
1687 adapter
->net_stats
.tx_window_errors
= 0;
1690 #define IXGB_MAX_INTR 10
1692 * ixgb_intr - Interrupt Handler
1693 * @irq: interrupt number
1694 * @data: pointer to a network interface device structure
1698 ixgb_intr(int irq
, void *data
)
1700 struct net_device
*netdev
= data
;
1701 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1702 struct ixgb_hw
*hw
= &adapter
->hw
;
1703 u32 icr
= IXGB_READ_REG(hw
, ICR
);
1706 return IRQ_NONE
; /* Not our interrupt */
1708 if (unlikely(icr
& (IXGB_INT_RXSEQ
| IXGB_INT_LSC
)))
1709 if (!test_bit(__IXGB_DOWN
, &adapter
->flags
))
1710 mod_timer(&adapter
->watchdog_timer
, jiffies
);
1712 if (netif_rx_schedule_prep(netdev
, &adapter
->napi
)) {
1714 /* Disable interrupts and register for poll. The flush
1715 of the posted write is intentionally left out.
1718 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
1719 __netif_rx_schedule(netdev
, &adapter
->napi
);
1725 * ixgb_clean - NAPI Rx polling callback
1726 * @adapter: board private structure
1730 ixgb_clean(struct napi_struct
*napi
, int budget
)
1732 struct ixgb_adapter
*adapter
= container_of(napi
, struct ixgb_adapter
, napi
);
1733 struct net_device
*netdev
= adapter
->netdev
;
1736 ixgb_clean_tx_irq(adapter
);
1737 ixgb_clean_rx_irq(adapter
, &work_done
, budget
);
1739 /* If budget not fully consumed, exit the polling mode */
1740 if (work_done
< budget
) {
1741 netif_rx_complete(netdev
, napi
);
1742 if (!test_bit(__IXGB_DOWN
, &adapter
->flags
))
1743 ixgb_irq_enable(adapter
);
1750 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1751 * @adapter: board private structure
1755 ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
)
1757 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1758 struct net_device
*netdev
= adapter
->netdev
;
1759 struct ixgb_tx_desc
*tx_desc
, *eop_desc
;
1760 struct ixgb_buffer
*buffer_info
;
1761 unsigned int i
, eop
;
1762 bool cleaned
= false;
1764 i
= tx_ring
->next_to_clean
;
1765 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1766 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1768 while (eop_desc
->status
& IXGB_TX_DESC_STATUS_DD
) {
1770 for (cleaned
= false; !cleaned
; ) {
1771 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1772 buffer_info
= &tx_ring
->buffer_info
[i
];
1774 if (tx_desc
->popts
&
1775 (IXGB_TX_DESC_POPTS_TXSM
|
1776 IXGB_TX_DESC_POPTS_IXSM
))
1777 adapter
->hw_csum_tx_good
++;
1779 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
1781 *(u32
*)&(tx_desc
->status
) = 0;
1783 cleaned
= (i
== eop
);
1784 if (++i
== tx_ring
->count
) i
= 0;
1787 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1788 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1791 tx_ring
->next_to_clean
= i
;
1793 if (unlikely(cleaned
&& netif_carrier_ok(netdev
) &&
1794 IXGB_DESC_UNUSED(tx_ring
) >= DESC_NEEDED
)) {
1795 /* Make sure that anybody stopping the queue after this
1796 * sees the new next_to_clean. */
1799 if (netif_queue_stopped(netdev
) &&
1800 !(test_bit(__IXGB_DOWN
, &adapter
->flags
))) {
1801 netif_wake_queue(netdev
);
1802 ++adapter
->restart_queue
;
1806 if (adapter
->detect_tx_hung
) {
1807 /* detect a transmit hang in hardware, this serializes the
1808 * check with the clearing of time_stamp and movement of i */
1809 adapter
->detect_tx_hung
= false;
1810 if (tx_ring
->buffer_info
[eop
].dma
&&
1811 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+ HZ
)
1812 && !(IXGB_READ_REG(&adapter
->hw
, STATUS
) &
1813 IXGB_STATUS_TXOFF
)) {
1814 /* detected Tx unit hang */
1815 DPRINTK(DRV
, ERR
, "Detected Tx Unit Hang\n"
1818 " next_to_use <%x>\n"
1819 " next_to_clean <%x>\n"
1820 "buffer_info[next_to_clean]\n"
1821 " time_stamp <%lx>\n"
1822 " next_to_watch <%x>\n"
1824 " next_to_watch.status <%x>\n",
1825 IXGB_READ_REG(&adapter
->hw
, TDH
),
1826 IXGB_READ_REG(&adapter
->hw
, TDT
),
1827 tx_ring
->next_to_use
,
1828 tx_ring
->next_to_clean
,
1829 tx_ring
->buffer_info
[eop
].time_stamp
,
1833 netif_stop_queue(netdev
);
1841 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1842 * @adapter: board private structure
1843 * @rx_desc: receive descriptor
1844 * @sk_buff: socket buffer with received data
1848 ixgb_rx_checksum(struct ixgb_adapter
*adapter
,
1849 struct ixgb_rx_desc
*rx_desc
,
1850 struct sk_buff
*skb
)
1852 /* Ignore Checksum bit is set OR
1853 * TCP Checksum has not been calculated
1855 if ((rx_desc
->status
& IXGB_RX_DESC_STATUS_IXSM
) ||
1856 (!(rx_desc
->status
& IXGB_RX_DESC_STATUS_TCPCS
))) {
1857 skb
->ip_summed
= CHECKSUM_NONE
;
1861 /* At this point we know the hardware did the TCP checksum */
1862 /* now look at the TCP checksum error bit */
1863 if (rx_desc
->errors
& IXGB_RX_DESC_ERRORS_TCPE
) {
1864 /* let the stack verify checksum errors */
1865 skb
->ip_summed
= CHECKSUM_NONE
;
1866 adapter
->hw_csum_rx_error
++;
1868 /* TCP checksum is good */
1869 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1870 adapter
->hw_csum_rx_good
++;
1875 * ixgb_clean_rx_irq - Send received data up the network stack,
1876 * @adapter: board private structure
1880 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
, int *work_done
, int work_to_do
)
1882 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1883 struct net_device
*netdev
= adapter
->netdev
;
1884 struct pci_dev
*pdev
= adapter
->pdev
;
1885 struct ixgb_rx_desc
*rx_desc
, *next_rxd
;
1886 struct ixgb_buffer
*buffer_info
, *next_buffer
, *next2_buffer
;
1889 int cleaned_count
= 0;
1890 bool cleaned
= false;
1892 i
= rx_ring
->next_to_clean
;
1893 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
1894 buffer_info
= &rx_ring
->buffer_info
[i
];
1896 while (rx_desc
->status
& IXGB_RX_DESC_STATUS_DD
) {
1897 struct sk_buff
*skb
;
1900 if (*work_done
>= work_to_do
)
1904 status
= rx_desc
->status
;
1905 skb
= buffer_info
->skb
;
1906 buffer_info
->skb
= NULL
;
1908 prefetch(skb
->data
- NET_IP_ALIGN
);
1910 if (++i
== rx_ring
->count
) i
= 0;
1911 next_rxd
= IXGB_RX_DESC(*rx_ring
, i
);
1914 if ((j
= i
+ 1) == rx_ring
->count
) j
= 0;
1915 next2_buffer
= &rx_ring
->buffer_info
[j
];
1916 prefetch(next2_buffer
);
1918 next_buffer
= &rx_ring
->buffer_info
[i
];
1923 pci_unmap_single(pdev
,
1925 buffer_info
->length
,
1926 PCI_DMA_FROMDEVICE
);
1927 buffer_info
->dma
= 0;
1929 length
= le16_to_cpu(rx_desc
->length
);
1930 rx_desc
->length
= 0;
1932 if (unlikely(!(status
& IXGB_RX_DESC_STATUS_EOP
))) {
1934 /* All receives must fit into a single buffer */
1936 IXGB_DBG("Receive packet consumed multiple buffers "
1937 "length<%x>\n", length
);
1939 dev_kfree_skb_irq(skb
);
1943 if (unlikely(rx_desc
->errors
&
1944 (IXGB_RX_DESC_ERRORS_CE
| IXGB_RX_DESC_ERRORS_SE
|
1945 IXGB_RX_DESC_ERRORS_P
| IXGB_RX_DESC_ERRORS_RXE
))) {
1946 dev_kfree_skb_irq(skb
);
1950 /* code added for copybreak, this should improve
1951 * performance for small packets with large amounts
1952 * of reassembly being done in the stack */
1953 if (length
< copybreak
) {
1954 struct sk_buff
*new_skb
=
1955 netdev_alloc_skb(netdev
, length
+ NET_IP_ALIGN
);
1957 skb_reserve(new_skb
, NET_IP_ALIGN
);
1958 skb_copy_to_linear_data_offset(new_skb
,
1964 /* save the skb in buffer_info as good */
1965 buffer_info
->skb
= skb
;
1969 /* end copybreak code */
1972 skb_put(skb
, length
);
1974 /* Receive Checksum Offload */
1975 ixgb_rx_checksum(adapter
, rx_desc
, skb
);
1977 skb
->protocol
= eth_type_trans(skb
, netdev
);
1978 if (adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
1979 vlan_hwaccel_receive_skb(skb
, adapter
->vlgrp
,
1980 le16_to_cpu(rx_desc
->special
));
1982 netif_receive_skb(skb
);
1984 netdev
->last_rx
= jiffies
;
1987 /* clean up descriptor, might be written over by hw */
1988 rx_desc
->status
= 0;
1990 /* return some buffers to hardware, one at a time is too slow */
1991 if (unlikely(cleaned_count
>= IXGB_RX_BUFFER_WRITE
)) {
1992 ixgb_alloc_rx_buffers(adapter
, cleaned_count
);
1996 /* use prefetched values */
1998 buffer_info
= next_buffer
;
2001 rx_ring
->next_to_clean
= i
;
2003 cleaned_count
= IXGB_DESC_UNUSED(rx_ring
);
2005 ixgb_alloc_rx_buffers(adapter
, cleaned_count
);
2011 * ixgb_alloc_rx_buffers - Replace used receive buffers
2012 * @adapter: address of board private structure
2016 ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
, int cleaned_count
)
2018 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
2019 struct net_device
*netdev
= adapter
->netdev
;
2020 struct pci_dev
*pdev
= adapter
->pdev
;
2021 struct ixgb_rx_desc
*rx_desc
;
2022 struct ixgb_buffer
*buffer_info
;
2023 struct sk_buff
*skb
;
2027 i
= rx_ring
->next_to_use
;
2028 buffer_info
= &rx_ring
->buffer_info
[i
];
2029 cleancount
= IXGB_DESC_UNUSED(rx_ring
);
2032 /* leave three descriptors unused */
2033 while (--cleancount
> 2 && cleaned_count
--) {
2034 /* recycle! its good for you */
2035 skb
= buffer_info
->skb
;
2041 skb
= netdev_alloc_skb(netdev
, adapter
->rx_buffer_len
2043 if (unlikely(!skb
)) {
2044 /* Better luck next round */
2045 adapter
->alloc_rx_buff_failed
++;
2049 /* Make buffer alignment 2 beyond a 16 byte boundary
2050 * this will result in a 16 byte aligned IP header after
2051 * the 14 byte MAC header is removed
2053 skb_reserve(skb
, NET_IP_ALIGN
);
2055 buffer_info
->skb
= skb
;
2056 buffer_info
->length
= adapter
->rx_buffer_len
;
2058 buffer_info
->dma
= pci_map_single(pdev
,
2060 adapter
->rx_buffer_len
,
2061 PCI_DMA_FROMDEVICE
);
2063 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
2064 rx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
2065 /* guarantee DD bit not set now before h/w gets descriptor
2066 * this is the rest of the workaround for h/w double
2068 rx_desc
->status
= 0;
2071 if (++i
== rx_ring
->count
) i
= 0;
2072 buffer_info
= &rx_ring
->buffer_info
[i
];
2075 if (likely(rx_ring
->next_to_use
!= i
)) {
2076 rx_ring
->next_to_use
= i
;
2077 if (unlikely(i
-- == 0))
2078 i
= (rx_ring
->count
- 1);
2080 /* Force memory writes to complete before letting h/w
2081 * know there are new descriptors to fetch. (Only
2082 * applicable for weak-ordered memory model archs, such
2085 IXGB_WRITE_REG(&adapter
->hw
, RDT
, i
);
2090 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2092 * @param netdev network interface device structure
2093 * @param grp indicates to enable or disable tagging/stripping
2096 ixgb_vlan_rx_register(struct net_device
*netdev
, struct vlan_group
*grp
)
2098 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2101 ixgb_irq_disable(adapter
);
2102 adapter
->vlgrp
= grp
;
2105 /* enable VLAN tag insert/strip */
2106 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2107 ctrl
|= IXGB_CTRL0_VME
;
2108 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2110 /* enable VLAN receive filtering */
2112 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2113 rctl
&= ~IXGB_RCTL_CFIEN
;
2114 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2116 /* disable VLAN tag insert/strip */
2118 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2119 ctrl
&= ~IXGB_CTRL0_VME
;
2120 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2123 /* don't enable interrupts unless we are UP */
2124 if (adapter
->netdev
->flags
& IFF_UP
)
2125 ixgb_irq_enable(adapter
);
2129 ixgb_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
2131 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2134 /* add VID to filter table */
2136 index
= (vid
>> 5) & 0x7F;
2137 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2138 vfta
|= (1 << (vid
& 0x1F));
2139 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2143 ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
2145 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2148 ixgb_irq_disable(adapter
);
2150 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
2152 /* don't enable interrupts unless we are UP */
2153 if (adapter
->netdev
->flags
& IFF_UP
)
2154 ixgb_irq_enable(adapter
);
2156 /* remove VID from filter table */
2158 index
= (vid
>> 5) & 0x7F;
2159 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2160 vfta
&= ~(1 << (vid
& 0x1F));
2161 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2165 ixgb_restore_vlan(struct ixgb_adapter
*adapter
)
2167 ixgb_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
2169 if (adapter
->vlgrp
) {
2171 for (vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
2172 if (!vlan_group_get_device(adapter
->vlgrp
, vid
))
2174 ixgb_vlan_rx_add_vid(adapter
->netdev
, vid
);
2179 #ifdef CONFIG_NET_POLL_CONTROLLER
2181 * Polling 'interrupt' - used by things like netconsole to send skbs
2182 * without having to re-enable interrupts. It's not called while
2183 * the interrupt routine is executing.
2186 static void ixgb_netpoll(struct net_device
*dev
)
2188 struct ixgb_adapter
*adapter
= netdev_priv(dev
);
2190 disable_irq(adapter
->pdev
->irq
);
2191 ixgb_intr(adapter
->pdev
->irq
, dev
);
2192 enable_irq(adapter
->pdev
->irq
);
2197 * ixgb_io_error_detected() - called when PCI error is detected
2198 * @pdev pointer to pci device with error
2199 * @state pci channel state after error
2201 * This callback is called by the PCI subsystem whenever
2202 * a PCI bus error is detected.
2204 static pci_ers_result_t
ixgb_io_error_detected(struct pci_dev
*pdev
,
2205 enum pci_channel_state state
)
2207 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2208 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2210 if (netif_running(netdev
))
2211 ixgb_down(adapter
, true);
2213 pci_disable_device(pdev
);
2215 /* Request a slot reset. */
2216 return PCI_ERS_RESULT_NEED_RESET
;
2220 * ixgb_io_slot_reset - called after the pci bus has been reset.
2221 * @pdev pointer to pci device with error
2223 * This callback is called after the PCI bus has been reset.
2224 * Basically, this tries to restart the card from scratch.
2225 * This is a shortened version of the device probe/discovery code,
2226 * it resembles the first-half of the ixgb_probe() routine.
2228 static pci_ers_result_t
ixgb_io_slot_reset(struct pci_dev
*pdev
)
2230 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2231 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2233 if (pci_enable_device(pdev
)) {
2234 DPRINTK(PROBE
, ERR
, "Cannot re-enable PCI device after reset.\n");
2235 return PCI_ERS_RESULT_DISCONNECT
;
2238 /* Perform card reset only on one instance of the card */
2239 if (0 != PCI_FUNC (pdev
->devfn
))
2240 return PCI_ERS_RESULT_RECOVERED
;
2242 pci_set_master(pdev
);
2244 netif_carrier_off(netdev
);
2245 netif_stop_queue(netdev
);
2246 ixgb_reset(adapter
);
2248 /* Make sure the EEPROM is good */
2249 if (!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
2250 DPRINTK(PROBE
, ERR
, "After reset, the EEPROM checksum is not valid.\n");
2251 return PCI_ERS_RESULT_DISCONNECT
;
2253 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
2254 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
2256 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
2257 DPRINTK(PROBE
, ERR
, "After reset, invalid MAC address.\n");
2258 return PCI_ERS_RESULT_DISCONNECT
;
2261 return PCI_ERS_RESULT_RECOVERED
;
2265 * ixgb_io_resume - called when its OK to resume normal operations
2266 * @pdev pointer to pci device with error
2268 * The error recovery driver tells us that its OK to resume
2269 * normal operation. Implementation resembles the second-half
2270 * of the ixgb_probe() routine.
2272 static void ixgb_io_resume(struct pci_dev
*pdev
)
2274 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2275 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2277 pci_set_master(pdev
);
2279 if (netif_running(netdev
)) {
2280 if (ixgb_up(adapter
)) {
2281 printk ("ixgb: can't bring device back up after reset\n");
2286 netif_device_attach(netdev
);
2287 mod_timer(&adapter
->watchdog_timer
, jiffies
);