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
31 #include <linux/prefetch.h>
34 char ixgb_driver_name
[] = "ixgb";
35 static char ixgb_driver_string
[] = "Intel(R) PRO/10GbE Network Driver";
37 #define DRIVERNAPI "-NAPI"
38 #define DRV_VERSION "1.0.135-k2" DRIVERNAPI
39 const char ixgb_driver_version
[] = DRV_VERSION
;
40 static const char ixgb_copyright
[] = "Copyright (c) 1999-2008 Intel Corporation.";
42 #define IXGB_CB_LENGTH 256
43 static unsigned int copybreak __read_mostly
= IXGB_CB_LENGTH
;
44 module_param(copybreak
, uint
, 0644);
45 MODULE_PARM_DESC(copybreak
,
46 "Maximum size of packet that is copied to a new buffer on receive");
48 /* ixgb_pci_tbl - PCI Device ID Table
50 * Wildcard entries (PCI_ANY_ID) should come last
51 * Last entry must be all 0s
53 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
54 * Class, Class Mask, private data (not used) }
56 static DEFINE_PCI_DEVICE_TABLE(ixgb_pci_tbl
) = {
57 {PCI_VENDOR_ID_INTEL
, IXGB_DEVICE_ID_82597EX
,
58 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
59 {PCI_VENDOR_ID_INTEL
, IXGB_DEVICE_ID_82597EX_CX4
,
60 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
61 {PCI_VENDOR_ID_INTEL
, IXGB_DEVICE_ID_82597EX_SR
,
62 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
63 {PCI_VENDOR_ID_INTEL
, IXGB_DEVICE_ID_82597EX_LR
,
64 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
66 /* required last entry */
70 MODULE_DEVICE_TABLE(pci
, ixgb_pci_tbl
);
72 /* Local Function Prototypes */
73 static int ixgb_init_module(void);
74 static void ixgb_exit_module(void);
75 static int ixgb_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
76 static void ixgb_remove(struct pci_dev
*pdev
);
77 static int ixgb_sw_init(struct ixgb_adapter
*adapter
);
78 static int ixgb_open(struct net_device
*netdev
);
79 static int ixgb_close(struct net_device
*netdev
);
80 static void ixgb_configure_tx(struct ixgb_adapter
*adapter
);
81 static void ixgb_configure_rx(struct ixgb_adapter
*adapter
);
82 static void ixgb_setup_rctl(struct ixgb_adapter
*adapter
);
83 static void ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
);
84 static void ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
);
85 static void ixgb_set_multi(struct net_device
*netdev
);
86 static void ixgb_watchdog(unsigned long data
);
87 static netdev_tx_t
ixgb_xmit_frame(struct sk_buff
*skb
,
88 struct net_device
*netdev
);
89 static struct net_device_stats
*ixgb_get_stats(struct net_device
*netdev
);
90 static int ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
);
91 static int ixgb_set_mac(struct net_device
*netdev
, void *p
);
92 static irqreturn_t
ixgb_intr(int irq
, void *data
);
93 static bool ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
);
95 static int ixgb_clean(struct napi_struct
*, int);
96 static bool ixgb_clean_rx_irq(struct ixgb_adapter
*, int *, int);
97 static void ixgb_alloc_rx_buffers(struct ixgb_adapter
*, int);
99 static void ixgb_tx_timeout(struct net_device
*dev
);
100 static void ixgb_tx_timeout_task(struct work_struct
*work
);
102 static void ixgb_vlan_strip_enable(struct ixgb_adapter
*adapter
);
103 static void ixgb_vlan_strip_disable(struct ixgb_adapter
*adapter
);
104 static int ixgb_vlan_rx_add_vid(struct net_device
*netdev
,
105 __be16 proto
, u16 vid
);
106 static int ixgb_vlan_rx_kill_vid(struct net_device
*netdev
,
107 __be16 proto
, u16 vid
);
108 static void ixgb_restore_vlan(struct ixgb_adapter
*adapter
);
110 #ifdef CONFIG_NET_POLL_CONTROLLER
111 /* for netdump / net console */
112 static void ixgb_netpoll(struct net_device
*dev
);
115 static pci_ers_result_t
ixgb_io_error_detected (struct pci_dev
*pdev
,
116 enum pci_channel_state state
);
117 static pci_ers_result_t
ixgb_io_slot_reset (struct pci_dev
*pdev
);
118 static void ixgb_io_resume (struct pci_dev
*pdev
);
120 static const struct pci_error_handlers ixgb_err_handler
= {
121 .error_detected
= ixgb_io_error_detected
,
122 .slot_reset
= ixgb_io_slot_reset
,
123 .resume
= ixgb_io_resume
,
126 static struct pci_driver ixgb_driver
= {
127 .name
= ixgb_driver_name
,
128 .id_table
= ixgb_pci_tbl
,
130 .remove
= ixgb_remove
,
131 .err_handler
= &ixgb_err_handler
134 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
135 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
136 MODULE_LICENSE("GPL");
137 MODULE_VERSION(DRV_VERSION
);
139 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
140 static int debug
= -1;
141 module_param(debug
, int, 0);
142 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
145 * ixgb_init_module - Driver Registration Routine
147 * ixgb_init_module is the first routine called when the driver is
148 * loaded. All it does is register with the PCI subsystem.
152 ixgb_init_module(void)
154 pr_info("%s - version %s\n", ixgb_driver_string
, ixgb_driver_version
);
155 pr_info("%s\n", ixgb_copyright
);
157 return pci_register_driver(&ixgb_driver
);
160 module_init(ixgb_init_module
);
163 * ixgb_exit_module - Driver Exit Cleanup Routine
165 * ixgb_exit_module is called just before the driver is removed
170 ixgb_exit_module(void)
172 pci_unregister_driver(&ixgb_driver
);
175 module_exit(ixgb_exit_module
);
178 * ixgb_irq_disable - Mask off interrupt generation on the NIC
179 * @adapter: board private structure
183 ixgb_irq_disable(struct ixgb_adapter
*adapter
)
185 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
186 IXGB_WRITE_FLUSH(&adapter
->hw
);
187 synchronize_irq(adapter
->pdev
->irq
);
191 * ixgb_irq_enable - Enable default interrupt generation settings
192 * @adapter: board private structure
196 ixgb_irq_enable(struct ixgb_adapter
*adapter
)
198 u32 val
= IXGB_INT_RXT0
| IXGB_INT_RXDMT0
|
199 IXGB_INT_TXDW
| IXGB_INT_LSC
;
200 if (adapter
->hw
.subsystem_vendor_id
== PCI_VENDOR_ID_SUN
)
201 val
|= IXGB_INT_GPI0
;
202 IXGB_WRITE_REG(&adapter
->hw
, IMS
, val
);
203 IXGB_WRITE_FLUSH(&adapter
->hw
);
207 ixgb_up(struct ixgb_adapter
*adapter
)
209 struct net_device
*netdev
= adapter
->netdev
;
210 int err
, irq_flags
= IRQF_SHARED
;
211 int max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
212 struct ixgb_hw
*hw
= &adapter
->hw
;
214 /* hardware has been reset, we need to reload some things */
216 ixgb_rar_set(hw
, netdev
->dev_addr
, 0);
217 ixgb_set_multi(netdev
);
219 ixgb_restore_vlan(adapter
);
221 ixgb_configure_tx(adapter
);
222 ixgb_setup_rctl(adapter
);
223 ixgb_configure_rx(adapter
);
224 ixgb_alloc_rx_buffers(adapter
, IXGB_DESC_UNUSED(&adapter
->rx_ring
));
226 /* disable interrupts and get the hardware into a known state */
227 IXGB_WRITE_REG(&adapter
->hw
, IMC
, 0xffffffff);
229 /* only enable MSI if bus is in PCI-X mode */
230 if (IXGB_READ_REG(&adapter
->hw
, STATUS
) & IXGB_STATUS_PCIX_MODE
) {
231 err
= pci_enable_msi(adapter
->pdev
);
233 adapter
->have_msi
= true;
236 /* proceed to try to request regular interrupt */
239 err
= request_irq(adapter
->pdev
->irq
, ixgb_intr
, irq_flags
,
240 netdev
->name
, netdev
);
242 if (adapter
->have_msi
)
243 pci_disable_msi(adapter
->pdev
);
244 netif_err(adapter
, probe
, adapter
->netdev
,
245 "Unable to allocate interrupt Error: %d\n", err
);
249 if ((hw
->max_frame_size
!= max_frame
) ||
250 (hw
->max_frame_size
!=
251 (IXGB_READ_REG(hw
, MFS
) >> IXGB_MFS_SHIFT
))) {
253 hw
->max_frame_size
= max_frame
;
255 IXGB_WRITE_REG(hw
, MFS
, hw
->max_frame_size
<< IXGB_MFS_SHIFT
);
257 if (hw
->max_frame_size
>
258 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
) {
259 u32 ctrl0
= IXGB_READ_REG(hw
, CTRL0
);
261 if (!(ctrl0
& IXGB_CTRL0_JFE
)) {
262 ctrl0
|= IXGB_CTRL0_JFE
;
263 IXGB_WRITE_REG(hw
, CTRL0
, ctrl0
);
268 clear_bit(__IXGB_DOWN
, &adapter
->flags
);
270 napi_enable(&adapter
->napi
);
271 ixgb_irq_enable(adapter
);
273 netif_wake_queue(netdev
);
275 mod_timer(&adapter
->watchdog_timer
, jiffies
);
281 ixgb_down(struct ixgb_adapter
*adapter
, bool kill_watchdog
)
283 struct net_device
*netdev
= adapter
->netdev
;
285 /* prevent the interrupt handler from restarting watchdog */
286 set_bit(__IXGB_DOWN
, &adapter
->flags
);
288 napi_disable(&adapter
->napi
);
289 /* waiting for NAPI to complete can re-enable interrupts */
290 ixgb_irq_disable(adapter
);
291 free_irq(adapter
->pdev
->irq
, netdev
);
293 if (adapter
->have_msi
)
294 pci_disable_msi(adapter
->pdev
);
297 del_timer_sync(&adapter
->watchdog_timer
);
299 adapter
->link_speed
= 0;
300 adapter
->link_duplex
= 0;
301 netif_carrier_off(netdev
);
302 netif_stop_queue(netdev
);
305 ixgb_clean_tx_ring(adapter
);
306 ixgb_clean_rx_ring(adapter
);
310 ixgb_reset(struct ixgb_adapter
*adapter
)
312 struct ixgb_hw
*hw
= &adapter
->hw
;
314 ixgb_adapter_stop(hw
);
315 if (!ixgb_init_hw(hw
))
316 netif_err(adapter
, probe
, adapter
->netdev
, "ixgb_init_hw failed\n");
318 /* restore frame size information */
319 IXGB_WRITE_REG(hw
, MFS
, hw
->max_frame_size
<< IXGB_MFS_SHIFT
);
320 if (hw
->max_frame_size
>
321 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
) {
322 u32 ctrl0
= IXGB_READ_REG(hw
, CTRL0
);
323 if (!(ctrl0
& IXGB_CTRL0_JFE
)) {
324 ctrl0
|= IXGB_CTRL0_JFE
;
325 IXGB_WRITE_REG(hw
, CTRL0
, ctrl0
);
330 static netdev_features_t
331 ixgb_fix_features(struct net_device
*netdev
, netdev_features_t features
)
334 * Tx VLAN insertion does not work per HW design when Rx stripping is
337 if (!(features
& NETIF_F_HW_VLAN_CTAG_RX
))
338 features
&= ~NETIF_F_HW_VLAN_CTAG_TX
;
344 ixgb_set_features(struct net_device
*netdev
, netdev_features_t features
)
346 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
347 netdev_features_t changed
= features
^ netdev
->features
;
349 if (!(changed
& (NETIF_F_RXCSUM
|NETIF_F_HW_VLAN_CTAG_RX
)))
352 adapter
->rx_csum
= !!(features
& NETIF_F_RXCSUM
);
354 if (netif_running(netdev
)) {
355 ixgb_down(adapter
, true);
357 ixgb_set_speed_duplex(netdev
);
365 static const struct net_device_ops ixgb_netdev_ops
= {
366 .ndo_open
= ixgb_open
,
367 .ndo_stop
= ixgb_close
,
368 .ndo_start_xmit
= ixgb_xmit_frame
,
369 .ndo_get_stats
= ixgb_get_stats
,
370 .ndo_set_rx_mode
= ixgb_set_multi
,
371 .ndo_validate_addr
= eth_validate_addr
,
372 .ndo_set_mac_address
= ixgb_set_mac
,
373 .ndo_change_mtu
= ixgb_change_mtu
,
374 .ndo_tx_timeout
= ixgb_tx_timeout
,
375 .ndo_vlan_rx_add_vid
= ixgb_vlan_rx_add_vid
,
376 .ndo_vlan_rx_kill_vid
= ixgb_vlan_rx_kill_vid
,
377 #ifdef CONFIG_NET_POLL_CONTROLLER
378 .ndo_poll_controller
= ixgb_netpoll
,
380 .ndo_fix_features
= ixgb_fix_features
,
381 .ndo_set_features
= ixgb_set_features
,
385 * ixgb_probe - Device Initialization Routine
386 * @pdev: PCI device information struct
387 * @ent: entry in ixgb_pci_tbl
389 * Returns 0 on success, negative on failure
391 * ixgb_probe initializes an adapter identified by a pci_dev structure.
392 * The OS initialization, configuring of the adapter private structure,
393 * and a hardware reset occur.
397 ixgb_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
399 struct net_device
*netdev
= NULL
;
400 struct ixgb_adapter
*adapter
;
401 static int cards_found
= 0;
406 err
= pci_enable_device(pdev
);
411 err
= dma_set_mask_and_coherent(&pdev
->dev
, DMA_BIT_MASK(64));
415 err
= dma_set_mask_and_coherent(&pdev
->dev
, DMA_BIT_MASK(32));
417 pr_err("No usable DMA configuration, aborting\n");
422 err
= pci_request_regions(pdev
, ixgb_driver_name
);
424 goto err_request_regions
;
426 pci_set_master(pdev
);
428 netdev
= alloc_etherdev(sizeof(struct ixgb_adapter
));
431 goto err_alloc_etherdev
;
434 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
436 pci_set_drvdata(pdev
, netdev
);
437 adapter
= netdev_priv(netdev
);
438 adapter
->netdev
= netdev
;
439 adapter
->pdev
= pdev
;
440 adapter
->hw
.back
= adapter
;
441 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_MSG_ENABLE
);
443 adapter
->hw
.hw_addr
= pci_ioremap_bar(pdev
, BAR_0
);
444 if (!adapter
->hw
.hw_addr
) {
449 for (i
= BAR_1
; i
<= BAR_5
; i
++) {
450 if (pci_resource_len(pdev
, i
) == 0)
452 if (pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
453 adapter
->hw
.io_base
= pci_resource_start(pdev
, i
);
458 netdev
->netdev_ops
= &ixgb_netdev_ops
;
459 ixgb_set_ethtool_ops(netdev
);
460 netdev
->watchdog_timeo
= 5 * HZ
;
461 netif_napi_add(netdev
, &adapter
->napi
, ixgb_clean
, 64);
463 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
465 adapter
->bd_number
= cards_found
;
466 adapter
->link_speed
= 0;
467 adapter
->link_duplex
= 0;
469 /* setup the private structure */
471 err
= ixgb_sw_init(adapter
);
475 netdev
->hw_features
= NETIF_F_SG
|
478 NETIF_F_HW_VLAN_CTAG_TX
|
479 NETIF_F_HW_VLAN_CTAG_RX
;
480 netdev
->features
= netdev
->hw_features
|
481 NETIF_F_HW_VLAN_CTAG_FILTER
;
482 netdev
->hw_features
|= NETIF_F_RXCSUM
;
485 netdev
->features
|= NETIF_F_HIGHDMA
;
486 netdev
->vlan_features
|= NETIF_F_HIGHDMA
;
489 /* make sure the EEPROM is good */
491 if (!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
492 netif_err(adapter
, probe
, adapter
->netdev
,
493 "The EEPROM Checksum Is Not Valid\n");
498 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
500 if (!is_valid_ether_addr(netdev
->dev_addr
)) {
501 netif_err(adapter
, probe
, adapter
->netdev
, "Invalid MAC Address\n");
506 adapter
->part_num
= ixgb_get_ee_pba_number(&adapter
->hw
);
508 init_timer(&adapter
->watchdog_timer
);
509 adapter
->watchdog_timer
.function
= ixgb_watchdog
;
510 adapter
->watchdog_timer
.data
= (unsigned long)adapter
;
512 INIT_WORK(&adapter
->tx_timeout_task
, ixgb_tx_timeout_task
);
514 strcpy(netdev
->name
, "eth%d");
515 err
= register_netdev(netdev
);
519 /* carrier off reporting is important to ethtool even BEFORE open */
520 netif_carrier_off(netdev
);
522 netif_info(adapter
, probe
, adapter
->netdev
,
523 "Intel(R) PRO/10GbE Network Connection\n");
524 ixgb_check_options(adapter
);
525 /* reset the hardware with the new settings */
535 iounmap(adapter
->hw
.hw_addr
);
539 pci_release_regions(pdev
);
542 pci_disable_device(pdev
);
547 * ixgb_remove - Device Removal Routine
548 * @pdev: PCI device information struct
550 * ixgb_remove is called by the PCI subsystem to alert the driver
551 * that it should release a PCI device. The could be caused by a
552 * Hot-Plug event, or because the driver is going to be removed from
557 ixgb_remove(struct pci_dev
*pdev
)
559 struct net_device
*netdev
= pci_get_drvdata(pdev
);
560 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
562 cancel_work_sync(&adapter
->tx_timeout_task
);
564 unregister_netdev(netdev
);
566 iounmap(adapter
->hw
.hw_addr
);
567 pci_release_regions(pdev
);
570 pci_disable_device(pdev
);
574 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
575 * @adapter: board private structure to initialize
577 * ixgb_sw_init initializes the Adapter private data structure.
578 * Fields are initialized based on PCI device information and
579 * OS network device settings (MTU size).
583 ixgb_sw_init(struct ixgb_adapter
*adapter
)
585 struct ixgb_hw
*hw
= &adapter
->hw
;
586 struct net_device
*netdev
= adapter
->netdev
;
587 struct pci_dev
*pdev
= adapter
->pdev
;
589 /* PCI config space info */
591 hw
->vendor_id
= pdev
->vendor
;
592 hw
->device_id
= pdev
->device
;
593 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
594 hw
->subsystem_id
= pdev
->subsystem_device
;
596 hw
->max_frame_size
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
597 adapter
->rx_buffer_len
= hw
->max_frame_size
+ 8; /* + 8 for errata */
599 if ((hw
->device_id
== IXGB_DEVICE_ID_82597EX
) ||
600 (hw
->device_id
== IXGB_DEVICE_ID_82597EX_CX4
) ||
601 (hw
->device_id
== IXGB_DEVICE_ID_82597EX_LR
) ||
602 (hw
->device_id
== IXGB_DEVICE_ID_82597EX_SR
))
603 hw
->mac_type
= ixgb_82597
;
605 /* should never have loaded on this device */
606 netif_err(adapter
, probe
, adapter
->netdev
, "unsupported device id\n");
609 /* enable flow control to be programmed */
612 set_bit(__IXGB_DOWN
, &adapter
->flags
);
617 * ixgb_open - Called when a network interface is made active
618 * @netdev: network interface device structure
620 * Returns 0 on success, negative value on failure
622 * The open entry point is called when a network interface is made
623 * active by the system (IFF_UP). At this point all resources needed
624 * for transmit and receive operations are allocated, the interrupt
625 * handler is registered with the OS, the watchdog timer is started,
626 * and the stack is notified that the interface is ready.
630 ixgb_open(struct net_device
*netdev
)
632 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
635 /* allocate transmit descriptors */
636 err
= ixgb_setup_tx_resources(adapter
);
640 netif_carrier_off(netdev
);
642 /* allocate receive descriptors */
644 err
= ixgb_setup_rx_resources(adapter
);
648 err
= ixgb_up(adapter
);
652 netif_start_queue(netdev
);
657 ixgb_free_rx_resources(adapter
);
659 ixgb_free_tx_resources(adapter
);
667 * ixgb_close - Disables a network interface
668 * @netdev: network interface device structure
670 * Returns 0, this is not allowed to fail
672 * The close entry point is called when an interface is de-activated
673 * by the OS. The hardware is still under the drivers control, but
674 * needs to be disabled. A global MAC reset is issued to stop the
675 * hardware, and all transmit and receive resources are freed.
679 ixgb_close(struct net_device
*netdev
)
681 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
683 ixgb_down(adapter
, true);
685 ixgb_free_tx_resources(adapter
);
686 ixgb_free_rx_resources(adapter
);
692 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
693 * @adapter: board private structure
695 * Return 0 on success, negative on failure
699 ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
)
701 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
702 struct pci_dev
*pdev
= adapter
->pdev
;
705 size
= sizeof(struct ixgb_buffer
) * txdr
->count
;
706 txdr
->buffer_info
= vzalloc(size
);
707 if (!txdr
->buffer_info
)
710 /* round up to nearest 4K */
712 txdr
->size
= txdr
->count
* sizeof(struct ixgb_tx_desc
);
713 txdr
->size
= ALIGN(txdr
->size
, 4096);
715 txdr
->desc
= dma_zalloc_coherent(&pdev
->dev
, txdr
->size
, &txdr
->dma
,
718 vfree(txdr
->buffer_info
);
722 txdr
->next_to_use
= 0;
723 txdr
->next_to_clean
= 0;
729 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
730 * @adapter: board private structure
732 * Configure the Tx unit of the MAC after a reset.
736 ixgb_configure_tx(struct ixgb_adapter
*adapter
)
738 u64 tdba
= adapter
->tx_ring
.dma
;
739 u32 tdlen
= adapter
->tx_ring
.count
* sizeof(struct ixgb_tx_desc
);
741 struct ixgb_hw
*hw
= &adapter
->hw
;
743 /* Setup the Base and Length of the Tx Descriptor Ring
744 * tx_ring.dma can be either a 32 or 64 bit value
747 IXGB_WRITE_REG(hw
, TDBAL
, (tdba
& 0x00000000ffffffffULL
));
748 IXGB_WRITE_REG(hw
, TDBAH
, (tdba
>> 32));
750 IXGB_WRITE_REG(hw
, TDLEN
, tdlen
);
752 /* Setup the HW Tx Head and Tail descriptor pointers */
754 IXGB_WRITE_REG(hw
, TDH
, 0);
755 IXGB_WRITE_REG(hw
, TDT
, 0);
757 /* don't set up txdctl, it induces performance problems if configured
759 /* Set the Tx Interrupt Delay register */
761 IXGB_WRITE_REG(hw
, TIDV
, adapter
->tx_int_delay
);
763 /* Program the Transmit Control Register */
765 tctl
= IXGB_TCTL_TCE
| IXGB_TCTL_TXEN
| IXGB_TCTL_TPDE
;
766 IXGB_WRITE_REG(hw
, TCTL
, tctl
);
768 /* Setup Transmit Descriptor Settings for this adapter */
769 adapter
->tx_cmd_type
=
771 (adapter
->tx_int_delay_enable
? IXGB_TX_DESC_CMD_IDE
: 0);
775 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
776 * @adapter: board private structure
778 * Returns 0 on success, negative on failure
782 ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
)
784 struct ixgb_desc_ring
*rxdr
= &adapter
->rx_ring
;
785 struct pci_dev
*pdev
= adapter
->pdev
;
788 size
= sizeof(struct ixgb_buffer
) * rxdr
->count
;
789 rxdr
->buffer_info
= vzalloc(size
);
790 if (!rxdr
->buffer_info
)
793 /* Round up to nearest 4K */
795 rxdr
->size
= rxdr
->count
* sizeof(struct ixgb_rx_desc
);
796 rxdr
->size
= ALIGN(rxdr
->size
, 4096);
798 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
, &rxdr
->dma
,
802 vfree(rxdr
->buffer_info
);
805 memset(rxdr
->desc
, 0, rxdr
->size
);
807 rxdr
->next_to_clean
= 0;
808 rxdr
->next_to_use
= 0;
814 * ixgb_setup_rctl - configure the receive control register
815 * @adapter: Board private structure
819 ixgb_setup_rctl(struct ixgb_adapter
*adapter
)
823 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
825 rctl
&= ~(3 << IXGB_RCTL_MO_SHIFT
);
828 IXGB_RCTL_BAM
| IXGB_RCTL_RDMTS_1_2
|
829 IXGB_RCTL_RXEN
| IXGB_RCTL_CFF
|
830 (adapter
->hw
.mc_filter_type
<< IXGB_RCTL_MO_SHIFT
);
832 rctl
|= IXGB_RCTL_SECRC
;
834 if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_2048
)
835 rctl
|= IXGB_RCTL_BSIZE_2048
;
836 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_4096
)
837 rctl
|= IXGB_RCTL_BSIZE_4096
;
838 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_8192
)
839 rctl
|= IXGB_RCTL_BSIZE_8192
;
840 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_16384
)
841 rctl
|= IXGB_RCTL_BSIZE_16384
;
843 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
847 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
848 * @adapter: board private structure
850 * Configure the Rx unit of the MAC after a reset.
854 ixgb_configure_rx(struct ixgb_adapter
*adapter
)
856 u64 rdba
= adapter
->rx_ring
.dma
;
857 u32 rdlen
= adapter
->rx_ring
.count
* sizeof(struct ixgb_rx_desc
);
858 struct ixgb_hw
*hw
= &adapter
->hw
;
862 /* make sure receives are disabled while setting up the descriptors */
864 rctl
= IXGB_READ_REG(hw
, RCTL
);
865 IXGB_WRITE_REG(hw
, RCTL
, rctl
& ~IXGB_RCTL_RXEN
);
867 /* set the Receive Delay Timer Register */
869 IXGB_WRITE_REG(hw
, RDTR
, adapter
->rx_int_delay
);
871 /* Setup the Base and Length of the Rx Descriptor Ring */
873 IXGB_WRITE_REG(hw
, RDBAL
, (rdba
& 0x00000000ffffffffULL
));
874 IXGB_WRITE_REG(hw
, RDBAH
, (rdba
>> 32));
876 IXGB_WRITE_REG(hw
, RDLEN
, rdlen
);
878 /* Setup the HW Rx Head and Tail Descriptor Pointers */
879 IXGB_WRITE_REG(hw
, RDH
, 0);
880 IXGB_WRITE_REG(hw
, RDT
, 0);
882 /* due to the hardware errata with RXDCTL, we are unable to use any of
883 * the performance enhancing features of it without causing other
884 * subtle bugs, some of the bugs could include receive length
885 * corruption at high data rates (WTHRESH > 0) and/or receive
886 * descriptor ring irregularites (particularly in hardware cache) */
887 IXGB_WRITE_REG(hw
, RXDCTL
, 0);
889 /* Enable Receive Checksum Offload for TCP and UDP */
890 if (adapter
->rx_csum
) {
891 rxcsum
= IXGB_READ_REG(hw
, RXCSUM
);
892 rxcsum
|= IXGB_RXCSUM_TUOFL
;
893 IXGB_WRITE_REG(hw
, RXCSUM
, rxcsum
);
896 /* Enable Receives */
898 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
902 * ixgb_free_tx_resources - Free Tx Resources
903 * @adapter: board private structure
905 * Free all transmit software resources
909 ixgb_free_tx_resources(struct ixgb_adapter
*adapter
)
911 struct pci_dev
*pdev
= adapter
->pdev
;
913 ixgb_clean_tx_ring(adapter
);
915 vfree(adapter
->tx_ring
.buffer_info
);
916 adapter
->tx_ring
.buffer_info
= NULL
;
918 dma_free_coherent(&pdev
->dev
, adapter
->tx_ring
.size
,
919 adapter
->tx_ring
.desc
, adapter
->tx_ring
.dma
);
921 adapter
->tx_ring
.desc
= NULL
;
925 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter
*adapter
,
926 struct ixgb_buffer
*buffer_info
)
928 if (buffer_info
->dma
) {
929 if (buffer_info
->mapped_as_page
)
930 dma_unmap_page(&adapter
->pdev
->dev
, buffer_info
->dma
,
931 buffer_info
->length
, DMA_TO_DEVICE
);
933 dma_unmap_single(&adapter
->pdev
->dev
, buffer_info
->dma
,
934 buffer_info
->length
, DMA_TO_DEVICE
);
935 buffer_info
->dma
= 0;
938 if (buffer_info
->skb
) {
939 dev_kfree_skb_any(buffer_info
->skb
);
940 buffer_info
->skb
= NULL
;
942 buffer_info
->time_stamp
= 0;
943 /* these fields must always be initialized in tx
944 * buffer_info->length = 0;
945 * buffer_info->next_to_watch = 0; */
949 * ixgb_clean_tx_ring - Free Tx Buffers
950 * @adapter: board private structure
954 ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
)
956 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
957 struct ixgb_buffer
*buffer_info
;
961 /* Free all the Tx ring sk_buffs */
963 for (i
= 0; i
< tx_ring
->count
; i
++) {
964 buffer_info
= &tx_ring
->buffer_info
[i
];
965 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
968 size
= sizeof(struct ixgb_buffer
) * tx_ring
->count
;
969 memset(tx_ring
->buffer_info
, 0, size
);
971 /* Zero out the descriptor ring */
973 memset(tx_ring
->desc
, 0, tx_ring
->size
);
975 tx_ring
->next_to_use
= 0;
976 tx_ring
->next_to_clean
= 0;
978 IXGB_WRITE_REG(&adapter
->hw
, TDH
, 0);
979 IXGB_WRITE_REG(&adapter
->hw
, TDT
, 0);
983 * ixgb_free_rx_resources - Free Rx Resources
984 * @adapter: board private structure
986 * Free all receive software resources
990 ixgb_free_rx_resources(struct ixgb_adapter
*adapter
)
992 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
993 struct pci_dev
*pdev
= adapter
->pdev
;
995 ixgb_clean_rx_ring(adapter
);
997 vfree(rx_ring
->buffer_info
);
998 rx_ring
->buffer_info
= NULL
;
1000 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
1003 rx_ring
->desc
= NULL
;
1007 * ixgb_clean_rx_ring - Free Rx Buffers
1008 * @adapter: board private structure
1012 ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
)
1014 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1015 struct ixgb_buffer
*buffer_info
;
1016 struct pci_dev
*pdev
= adapter
->pdev
;
1020 /* Free all the Rx ring sk_buffs */
1022 for (i
= 0; i
< rx_ring
->count
; i
++) {
1023 buffer_info
= &rx_ring
->buffer_info
[i
];
1024 if (buffer_info
->dma
) {
1025 dma_unmap_single(&pdev
->dev
,
1027 buffer_info
->length
,
1029 buffer_info
->dma
= 0;
1030 buffer_info
->length
= 0;
1033 if (buffer_info
->skb
) {
1034 dev_kfree_skb(buffer_info
->skb
);
1035 buffer_info
->skb
= NULL
;
1039 size
= sizeof(struct ixgb_buffer
) * rx_ring
->count
;
1040 memset(rx_ring
->buffer_info
, 0, size
);
1042 /* Zero out the descriptor ring */
1044 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1046 rx_ring
->next_to_clean
= 0;
1047 rx_ring
->next_to_use
= 0;
1049 IXGB_WRITE_REG(&adapter
->hw
, RDH
, 0);
1050 IXGB_WRITE_REG(&adapter
->hw
, RDT
, 0);
1054 * ixgb_set_mac - Change the Ethernet Address of the NIC
1055 * @netdev: network interface device structure
1056 * @p: pointer to an address structure
1058 * Returns 0 on success, negative on failure
1062 ixgb_set_mac(struct net_device
*netdev
, void *p
)
1064 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1065 struct sockaddr
*addr
= p
;
1067 if (!is_valid_ether_addr(addr
->sa_data
))
1068 return -EADDRNOTAVAIL
;
1070 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1072 ixgb_rar_set(&adapter
->hw
, addr
->sa_data
, 0);
1078 * ixgb_set_multi - Multicast and Promiscuous mode set
1079 * @netdev: network interface device structure
1081 * The set_multi entry point is called whenever the multicast address
1082 * list or the network interface flags are updated. This routine is
1083 * responsible for configuring the hardware for proper multicast,
1084 * promiscuous mode, and all-multi behavior.
1088 ixgb_set_multi(struct net_device
*netdev
)
1090 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1091 struct ixgb_hw
*hw
= &adapter
->hw
;
1092 struct netdev_hw_addr
*ha
;
1095 /* Check for Promiscuous and All Multicast modes */
1097 rctl
= IXGB_READ_REG(hw
, RCTL
);
1099 if (netdev
->flags
& IFF_PROMISC
) {
1100 rctl
|= (IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1101 /* disable VLAN filtering */
1102 rctl
&= ~IXGB_RCTL_CFIEN
;
1103 rctl
&= ~IXGB_RCTL_VFE
;
1105 if (netdev
->flags
& IFF_ALLMULTI
) {
1106 rctl
|= IXGB_RCTL_MPE
;
1107 rctl
&= ~IXGB_RCTL_UPE
;
1109 rctl
&= ~(IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1111 /* enable VLAN filtering */
1112 rctl
|= IXGB_RCTL_VFE
;
1113 rctl
&= ~IXGB_RCTL_CFIEN
;
1116 if (netdev_mc_count(netdev
) > IXGB_MAX_NUM_MULTICAST_ADDRESSES
) {
1117 rctl
|= IXGB_RCTL_MPE
;
1118 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1120 u8
*mta
= kmalloc(IXGB_MAX_NUM_MULTICAST_ADDRESSES
*
1121 ETH_ALEN
, GFP_ATOMIC
);
1126 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1129 netdev_for_each_mc_addr(ha
, netdev
) {
1130 memcpy(addr
, ha
->addr
, ETH_ALEN
);
1134 ixgb_mc_addr_list_update(hw
, mta
, netdev_mc_count(netdev
), 0);
1139 if (netdev
->features
& NETIF_F_HW_VLAN_CTAG_RX
)
1140 ixgb_vlan_strip_enable(adapter
);
1142 ixgb_vlan_strip_disable(adapter
);
1147 * ixgb_watchdog - Timer Call-back
1148 * @data: pointer to netdev cast into an unsigned long
1152 ixgb_watchdog(unsigned long data
)
1154 struct ixgb_adapter
*adapter
= (struct ixgb_adapter
*)data
;
1155 struct net_device
*netdev
= adapter
->netdev
;
1156 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
1158 ixgb_check_for_link(&adapter
->hw
);
1160 if (ixgb_check_for_bad_link(&adapter
->hw
)) {
1161 /* force the reset path */
1162 netif_stop_queue(netdev
);
1165 if (adapter
->hw
.link_up
) {
1166 if (!netif_carrier_ok(netdev
)) {
1168 "NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n",
1169 (adapter
->hw
.fc
.type
== ixgb_fc_full
) ?
1171 (adapter
->hw
.fc
.type
== ixgb_fc_rx_pause
) ?
1173 (adapter
->hw
.fc
.type
== ixgb_fc_tx_pause
) ?
1175 adapter
->link_speed
= 10000;
1176 adapter
->link_duplex
= FULL_DUPLEX
;
1177 netif_carrier_on(netdev
);
1180 if (netif_carrier_ok(netdev
)) {
1181 adapter
->link_speed
= 0;
1182 adapter
->link_duplex
= 0;
1183 netdev_info(netdev
, "NIC Link is Down\n");
1184 netif_carrier_off(netdev
);
1188 ixgb_update_stats(adapter
);
1190 if (!netif_carrier_ok(netdev
)) {
1191 if (IXGB_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
1192 /* We've lost link, so the controller stops DMA,
1193 * but we've got queued Tx work that's never going
1194 * to get done, so reset controller to flush Tx.
1195 * (Do the reset outside of interrupt context). */
1196 schedule_work(&adapter
->tx_timeout_task
);
1197 /* return immediately since reset is imminent */
1202 /* Force detection of hung controller every watchdog period */
1203 adapter
->detect_tx_hung
= true;
1205 /* generate an interrupt to force clean up of any stragglers */
1206 IXGB_WRITE_REG(&adapter
->hw
, ICS
, IXGB_INT_TXDW
);
1208 /* Reset the timer */
1209 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 2 * HZ
);
1212 #define IXGB_TX_FLAGS_CSUM 0x00000001
1213 #define IXGB_TX_FLAGS_VLAN 0x00000002
1214 #define IXGB_TX_FLAGS_TSO 0x00000004
1217 ixgb_tso(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1219 struct ixgb_context_desc
*context_desc
;
1221 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
1222 u16 ipcse
, tucse
, mss
;
1224 if (likely(skb_is_gso(skb
))) {
1225 struct ixgb_buffer
*buffer_info
;
1229 err
= skb_cow_head(skb
, 0);
1233 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
1234 mss
= skb_shinfo(skb
)->gso_size
;
1238 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
1241 ipcss
= skb_network_offset(skb
);
1242 ipcso
= (void *)&(iph
->check
) - (void *)skb
->data
;
1243 ipcse
= skb_transport_offset(skb
) - 1;
1244 tucss
= skb_transport_offset(skb
);
1245 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
1248 i
= adapter
->tx_ring
.next_to_use
;
1249 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1250 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1251 WARN_ON(buffer_info
->dma
!= 0);
1253 context_desc
->ipcss
= ipcss
;
1254 context_desc
->ipcso
= ipcso
;
1255 context_desc
->ipcse
= cpu_to_le16(ipcse
);
1256 context_desc
->tucss
= tucss
;
1257 context_desc
->tucso
= tucso
;
1258 context_desc
->tucse
= cpu_to_le16(tucse
);
1259 context_desc
->mss
= cpu_to_le16(mss
);
1260 context_desc
->hdr_len
= hdr_len
;
1261 context_desc
->status
= 0;
1262 context_desc
->cmd_type_len
= cpu_to_le32(
1263 IXGB_CONTEXT_DESC_TYPE
1264 | IXGB_CONTEXT_DESC_CMD_TSE
1265 | IXGB_CONTEXT_DESC_CMD_IP
1266 | IXGB_CONTEXT_DESC_CMD_TCP
1267 | IXGB_CONTEXT_DESC_CMD_IDE
1268 | (skb
->len
- (hdr_len
)));
1271 if (++i
== adapter
->tx_ring
.count
) i
= 0;
1272 adapter
->tx_ring
.next_to_use
= i
;
1281 ixgb_tx_csum(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1283 struct ixgb_context_desc
*context_desc
;
1287 if (likely(skb
->ip_summed
== CHECKSUM_PARTIAL
)) {
1288 struct ixgb_buffer
*buffer_info
;
1289 css
= skb_checksum_start_offset(skb
);
1290 cso
= css
+ skb
->csum_offset
;
1292 i
= adapter
->tx_ring
.next_to_use
;
1293 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1294 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1295 WARN_ON(buffer_info
->dma
!= 0);
1297 context_desc
->tucss
= css
;
1298 context_desc
->tucso
= cso
;
1299 context_desc
->tucse
= 0;
1300 /* zero out any previously existing data in one instruction */
1301 *(u32
*)&(context_desc
->ipcss
) = 0;
1302 context_desc
->status
= 0;
1303 context_desc
->hdr_len
= 0;
1304 context_desc
->mss
= 0;
1305 context_desc
->cmd_type_len
=
1306 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1307 | IXGB_TX_DESC_CMD_IDE
);
1309 if (++i
== adapter
->tx_ring
.count
) i
= 0;
1310 adapter
->tx_ring
.next_to_use
= i
;
1318 #define IXGB_MAX_TXD_PWR 14
1319 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1322 ixgb_tx_map(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
,
1325 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1326 struct pci_dev
*pdev
= adapter
->pdev
;
1327 struct ixgb_buffer
*buffer_info
;
1328 int len
= skb_headlen(skb
);
1329 unsigned int offset
= 0, size
, count
= 0, i
;
1330 unsigned int mss
= skb_shinfo(skb
)->gso_size
;
1331 unsigned int nr_frags
= skb_shinfo(skb
)->nr_frags
;
1334 i
= tx_ring
->next_to_use
;
1337 buffer_info
= &tx_ring
->buffer_info
[i
];
1338 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1339 /* Workaround for premature desc write-backs
1340 * in TSO mode. Append 4-byte sentinel desc */
1341 if (unlikely(mss
&& !nr_frags
&& size
== len
&& size
> 8))
1344 buffer_info
->length
= size
;
1345 WARN_ON(buffer_info
->dma
!= 0);
1346 buffer_info
->time_stamp
= jiffies
;
1347 buffer_info
->mapped_as_page
= false;
1348 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
1350 size
, DMA_TO_DEVICE
);
1351 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
1353 buffer_info
->next_to_watch
= 0;
1360 if (i
== tx_ring
->count
)
1365 for (f
= 0; f
< nr_frags
; f
++) {
1366 const struct skb_frag_struct
*frag
;
1368 frag
= &skb_shinfo(skb
)->frags
[f
];
1369 len
= skb_frag_size(frag
);
1374 if (i
== tx_ring
->count
)
1377 buffer_info
= &tx_ring
->buffer_info
[i
];
1378 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1380 /* Workaround for premature desc write-backs
1381 * in TSO mode. Append 4-byte sentinel desc */
1382 if (unlikely(mss
&& (f
== (nr_frags
- 1))
1383 && size
== len
&& size
> 8))
1386 buffer_info
->length
= size
;
1387 buffer_info
->time_stamp
= jiffies
;
1388 buffer_info
->mapped_as_page
= true;
1390 skb_frag_dma_map(&pdev
->dev
, frag
, offset
, size
,
1392 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
1394 buffer_info
->next_to_watch
= 0;
1401 tx_ring
->buffer_info
[i
].skb
= skb
;
1402 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
1407 dev_err(&pdev
->dev
, "TX DMA map failed\n");
1408 buffer_info
->dma
= 0;
1414 i
+= tx_ring
->count
;
1416 buffer_info
= &tx_ring
->buffer_info
[i
];
1417 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
1424 ixgb_tx_queue(struct ixgb_adapter
*adapter
, int count
, int vlan_id
,int tx_flags
)
1426 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1427 struct ixgb_tx_desc
*tx_desc
= NULL
;
1428 struct ixgb_buffer
*buffer_info
;
1429 u32 cmd_type_len
= adapter
->tx_cmd_type
;
1434 if (tx_flags
& IXGB_TX_FLAGS_TSO
) {
1435 cmd_type_len
|= IXGB_TX_DESC_CMD_TSE
;
1436 popts
|= (IXGB_TX_DESC_POPTS_IXSM
| IXGB_TX_DESC_POPTS_TXSM
);
1439 if (tx_flags
& IXGB_TX_FLAGS_CSUM
)
1440 popts
|= IXGB_TX_DESC_POPTS_TXSM
;
1442 if (tx_flags
& IXGB_TX_FLAGS_VLAN
)
1443 cmd_type_len
|= IXGB_TX_DESC_CMD_VLE
;
1445 i
= tx_ring
->next_to_use
;
1448 buffer_info
= &tx_ring
->buffer_info
[i
];
1449 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1450 tx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
1451 tx_desc
->cmd_type_len
=
1452 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
1453 tx_desc
->status
= status
;
1454 tx_desc
->popts
= popts
;
1455 tx_desc
->vlan
= cpu_to_le16(vlan_id
);
1457 if (++i
== tx_ring
->count
) i
= 0;
1460 tx_desc
->cmd_type_len
|=
1461 cpu_to_le32(IXGB_TX_DESC_CMD_EOP
| IXGB_TX_DESC_CMD_RS
);
1463 /* Force memory writes to complete before letting h/w
1464 * know there are new descriptors to fetch. (Only
1465 * applicable for weak-ordered memory model archs,
1466 * such as IA-64). */
1469 tx_ring
->next_to_use
= i
;
1470 IXGB_WRITE_REG(&adapter
->hw
, TDT
, i
);
1473 static int __ixgb_maybe_stop_tx(struct net_device
*netdev
, int size
)
1475 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1476 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1478 netif_stop_queue(netdev
);
1479 /* Herbert's original patch had:
1480 * smp_mb__after_netif_stop_queue();
1481 * but since that doesn't exist yet, just open code it. */
1484 /* We need to check again in a case another CPU has just
1485 * made room available. */
1486 if (likely(IXGB_DESC_UNUSED(tx_ring
) < size
))
1490 netif_start_queue(netdev
);
1491 ++adapter
->restart_queue
;
1495 static int ixgb_maybe_stop_tx(struct net_device
*netdev
,
1496 struct ixgb_desc_ring
*tx_ring
, int size
)
1498 if (likely(IXGB_DESC_UNUSED(tx_ring
) >= size
))
1500 return __ixgb_maybe_stop_tx(netdev
, size
);
1504 /* Tx Descriptors needed, worst case */
1505 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1506 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1507 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1508 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1509 + 1 /* one more needed for sentinel TSO workaround */
1512 ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
1514 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1516 unsigned int tx_flags
= 0;
1521 if (test_bit(__IXGB_DOWN
, &adapter
->flags
)) {
1522 dev_kfree_skb_any(skb
);
1523 return NETDEV_TX_OK
;
1526 if (skb
->len
<= 0) {
1527 dev_kfree_skb_any(skb
);
1528 return NETDEV_TX_OK
;
1531 if (unlikely(ixgb_maybe_stop_tx(netdev
, &adapter
->tx_ring
,
1533 return NETDEV_TX_BUSY
;
1535 if (vlan_tx_tag_present(skb
)) {
1536 tx_flags
|= IXGB_TX_FLAGS_VLAN
;
1537 vlan_id
= vlan_tx_tag_get(skb
);
1540 first
= adapter
->tx_ring
.next_to_use
;
1542 tso
= ixgb_tso(adapter
, skb
);
1544 dev_kfree_skb_any(skb
);
1545 return NETDEV_TX_OK
;
1549 tx_flags
|= IXGB_TX_FLAGS_TSO
;
1550 else if (ixgb_tx_csum(adapter
, skb
))
1551 tx_flags
|= IXGB_TX_FLAGS_CSUM
;
1553 count
= ixgb_tx_map(adapter
, skb
, first
);
1556 ixgb_tx_queue(adapter
, count
, vlan_id
, tx_flags
);
1557 /* Make sure there is space in the ring for the next send. */
1558 ixgb_maybe_stop_tx(netdev
, &adapter
->tx_ring
, DESC_NEEDED
);
1561 dev_kfree_skb_any(skb
);
1562 adapter
->tx_ring
.buffer_info
[first
].time_stamp
= 0;
1563 adapter
->tx_ring
.next_to_use
= first
;
1566 return NETDEV_TX_OK
;
1570 * ixgb_tx_timeout - Respond to a Tx Hang
1571 * @netdev: network interface device structure
1575 ixgb_tx_timeout(struct net_device
*netdev
)
1577 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1579 /* Do the reset outside of interrupt context */
1580 schedule_work(&adapter
->tx_timeout_task
);
1584 ixgb_tx_timeout_task(struct work_struct
*work
)
1586 struct ixgb_adapter
*adapter
=
1587 container_of(work
, struct ixgb_adapter
, tx_timeout_task
);
1589 adapter
->tx_timeout_count
++;
1590 ixgb_down(adapter
, true);
1595 * ixgb_get_stats - Get System Network Statistics
1596 * @netdev: network interface device structure
1598 * Returns the address of the device statistics structure.
1599 * The statistics are actually updated from the timer callback.
1602 static struct net_device_stats
*
1603 ixgb_get_stats(struct net_device
*netdev
)
1605 return &netdev
->stats
;
1609 * ixgb_change_mtu - Change the Maximum Transfer Unit
1610 * @netdev: network interface device structure
1611 * @new_mtu: new value for maximum frame size
1613 * Returns 0 on success, negative on failure
1617 ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
)
1619 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1620 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1621 int old_max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1623 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1624 if ((new_mtu
< 68) ||
1625 (max_frame
> IXGB_MAX_JUMBO_FRAME_SIZE
+ ENET_FCS_LENGTH
)) {
1626 netif_err(adapter
, probe
, adapter
->netdev
,
1627 "Invalid MTU setting %d\n", new_mtu
);
1631 if (old_max_frame
== max_frame
)
1634 if (netif_running(netdev
))
1635 ixgb_down(adapter
, true);
1637 adapter
->rx_buffer_len
= max_frame
+ 8; /* + 8 for errata */
1639 netdev
->mtu
= new_mtu
;
1641 if (netif_running(netdev
))
1648 * ixgb_update_stats - Update the board statistics counters.
1649 * @adapter: board private structure
1653 ixgb_update_stats(struct ixgb_adapter
*adapter
)
1655 struct net_device
*netdev
= adapter
->netdev
;
1656 struct pci_dev
*pdev
= adapter
->pdev
;
1658 /* Prevent stats update while adapter is being reset */
1659 if (pci_channel_offline(pdev
))
1662 if ((netdev
->flags
& IFF_PROMISC
) || (netdev
->flags
& IFF_ALLMULTI
) ||
1663 (netdev_mc_count(netdev
) > IXGB_MAX_NUM_MULTICAST_ADDRESSES
)) {
1664 u64 multi
= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1665 u32 bcast_l
= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1666 u32 bcast_h
= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1667 u64 bcast
= ((u64
)bcast_h
<< 32) | bcast_l
;
1669 multi
|= ((u64
)IXGB_READ_REG(&adapter
->hw
, MPRCH
) << 32);
1670 /* fix up multicast stats by removing broadcasts */
1674 adapter
->stats
.mprcl
+= (multi
& 0xFFFFFFFF);
1675 adapter
->stats
.mprch
+= (multi
>> 32);
1676 adapter
->stats
.bprcl
+= bcast_l
;
1677 adapter
->stats
.bprch
+= bcast_h
;
1679 adapter
->stats
.mprcl
+= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1680 adapter
->stats
.mprch
+= IXGB_READ_REG(&adapter
->hw
, MPRCH
);
1681 adapter
->stats
.bprcl
+= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1682 adapter
->stats
.bprch
+= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1684 adapter
->stats
.tprl
+= IXGB_READ_REG(&adapter
->hw
, TPRL
);
1685 adapter
->stats
.tprh
+= IXGB_READ_REG(&adapter
->hw
, TPRH
);
1686 adapter
->stats
.gprcl
+= IXGB_READ_REG(&adapter
->hw
, GPRCL
);
1687 adapter
->stats
.gprch
+= IXGB_READ_REG(&adapter
->hw
, GPRCH
);
1688 adapter
->stats
.uprcl
+= IXGB_READ_REG(&adapter
->hw
, UPRCL
);
1689 adapter
->stats
.uprch
+= IXGB_READ_REG(&adapter
->hw
, UPRCH
);
1690 adapter
->stats
.vprcl
+= IXGB_READ_REG(&adapter
->hw
, VPRCL
);
1691 adapter
->stats
.vprch
+= IXGB_READ_REG(&adapter
->hw
, VPRCH
);
1692 adapter
->stats
.jprcl
+= IXGB_READ_REG(&adapter
->hw
, JPRCL
);
1693 adapter
->stats
.jprch
+= IXGB_READ_REG(&adapter
->hw
, JPRCH
);
1694 adapter
->stats
.gorcl
+= IXGB_READ_REG(&adapter
->hw
, GORCL
);
1695 adapter
->stats
.gorch
+= IXGB_READ_REG(&adapter
->hw
, GORCH
);
1696 adapter
->stats
.torl
+= IXGB_READ_REG(&adapter
->hw
, TORL
);
1697 adapter
->stats
.torh
+= IXGB_READ_REG(&adapter
->hw
, TORH
);
1698 adapter
->stats
.rnbc
+= IXGB_READ_REG(&adapter
->hw
, RNBC
);
1699 adapter
->stats
.ruc
+= IXGB_READ_REG(&adapter
->hw
, RUC
);
1700 adapter
->stats
.roc
+= IXGB_READ_REG(&adapter
->hw
, ROC
);
1701 adapter
->stats
.rlec
+= IXGB_READ_REG(&adapter
->hw
, RLEC
);
1702 adapter
->stats
.crcerrs
+= IXGB_READ_REG(&adapter
->hw
, CRCERRS
);
1703 adapter
->stats
.icbc
+= IXGB_READ_REG(&adapter
->hw
, ICBC
);
1704 adapter
->stats
.ecbc
+= IXGB_READ_REG(&adapter
->hw
, ECBC
);
1705 adapter
->stats
.mpc
+= IXGB_READ_REG(&adapter
->hw
, MPC
);
1706 adapter
->stats
.tptl
+= IXGB_READ_REG(&adapter
->hw
, TPTL
);
1707 adapter
->stats
.tpth
+= IXGB_READ_REG(&adapter
->hw
, TPTH
);
1708 adapter
->stats
.gptcl
+= IXGB_READ_REG(&adapter
->hw
, GPTCL
);
1709 adapter
->stats
.gptch
+= IXGB_READ_REG(&adapter
->hw
, GPTCH
);
1710 adapter
->stats
.bptcl
+= IXGB_READ_REG(&adapter
->hw
, BPTCL
);
1711 adapter
->stats
.bptch
+= IXGB_READ_REG(&adapter
->hw
, BPTCH
);
1712 adapter
->stats
.mptcl
+= IXGB_READ_REG(&adapter
->hw
, MPTCL
);
1713 adapter
->stats
.mptch
+= IXGB_READ_REG(&adapter
->hw
, MPTCH
);
1714 adapter
->stats
.uptcl
+= IXGB_READ_REG(&adapter
->hw
, UPTCL
);
1715 adapter
->stats
.uptch
+= IXGB_READ_REG(&adapter
->hw
, UPTCH
);
1716 adapter
->stats
.vptcl
+= IXGB_READ_REG(&adapter
->hw
, VPTCL
);
1717 adapter
->stats
.vptch
+= IXGB_READ_REG(&adapter
->hw
, VPTCH
);
1718 adapter
->stats
.jptcl
+= IXGB_READ_REG(&adapter
->hw
, JPTCL
);
1719 adapter
->stats
.jptch
+= IXGB_READ_REG(&adapter
->hw
, JPTCH
);
1720 adapter
->stats
.gotcl
+= IXGB_READ_REG(&adapter
->hw
, GOTCL
);
1721 adapter
->stats
.gotch
+= IXGB_READ_REG(&adapter
->hw
, GOTCH
);
1722 adapter
->stats
.totl
+= IXGB_READ_REG(&adapter
->hw
, TOTL
);
1723 adapter
->stats
.toth
+= IXGB_READ_REG(&adapter
->hw
, TOTH
);
1724 adapter
->stats
.dc
+= IXGB_READ_REG(&adapter
->hw
, DC
);
1725 adapter
->stats
.plt64c
+= IXGB_READ_REG(&adapter
->hw
, PLT64C
);
1726 adapter
->stats
.tsctc
+= IXGB_READ_REG(&adapter
->hw
, TSCTC
);
1727 adapter
->stats
.tsctfc
+= IXGB_READ_REG(&adapter
->hw
, TSCTFC
);
1728 adapter
->stats
.ibic
+= IXGB_READ_REG(&adapter
->hw
, IBIC
);
1729 adapter
->stats
.rfc
+= IXGB_READ_REG(&adapter
->hw
, RFC
);
1730 adapter
->stats
.lfc
+= IXGB_READ_REG(&adapter
->hw
, LFC
);
1731 adapter
->stats
.pfrc
+= IXGB_READ_REG(&adapter
->hw
, PFRC
);
1732 adapter
->stats
.pftc
+= IXGB_READ_REG(&adapter
->hw
, PFTC
);
1733 adapter
->stats
.mcfrc
+= IXGB_READ_REG(&adapter
->hw
, MCFRC
);
1734 adapter
->stats
.mcftc
+= IXGB_READ_REG(&adapter
->hw
, MCFTC
);
1735 adapter
->stats
.xonrxc
+= IXGB_READ_REG(&adapter
->hw
, XONRXC
);
1736 adapter
->stats
.xontxc
+= IXGB_READ_REG(&adapter
->hw
, XONTXC
);
1737 adapter
->stats
.xoffrxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFRXC
);
1738 adapter
->stats
.xofftxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFTXC
);
1739 adapter
->stats
.rjc
+= IXGB_READ_REG(&adapter
->hw
, RJC
);
1741 /* Fill out the OS statistics structure */
1743 netdev
->stats
.rx_packets
= adapter
->stats
.gprcl
;
1744 netdev
->stats
.tx_packets
= adapter
->stats
.gptcl
;
1745 netdev
->stats
.rx_bytes
= adapter
->stats
.gorcl
;
1746 netdev
->stats
.tx_bytes
= adapter
->stats
.gotcl
;
1747 netdev
->stats
.multicast
= adapter
->stats
.mprcl
;
1748 netdev
->stats
.collisions
= 0;
1750 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1751 * with a length in the type/len field */
1752 netdev
->stats
.rx_errors
=
1753 /* adapter->stats.rnbc + */ adapter
->stats
.crcerrs
+
1754 adapter
->stats
.ruc
+
1755 adapter
->stats
.roc
/*+ adapter->stats.rlec */ +
1756 adapter
->stats
.icbc
+
1757 adapter
->stats
.ecbc
+ adapter
->stats
.mpc
;
1760 * netdev->stats.rx_length_errors = adapter->stats.rlec;
1763 netdev
->stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
1764 netdev
->stats
.rx_fifo_errors
= adapter
->stats
.mpc
;
1765 netdev
->stats
.rx_missed_errors
= adapter
->stats
.mpc
;
1766 netdev
->stats
.rx_over_errors
= adapter
->stats
.mpc
;
1768 netdev
->stats
.tx_errors
= 0;
1769 netdev
->stats
.rx_frame_errors
= 0;
1770 netdev
->stats
.tx_aborted_errors
= 0;
1771 netdev
->stats
.tx_carrier_errors
= 0;
1772 netdev
->stats
.tx_fifo_errors
= 0;
1773 netdev
->stats
.tx_heartbeat_errors
= 0;
1774 netdev
->stats
.tx_window_errors
= 0;
1777 #define IXGB_MAX_INTR 10
1779 * ixgb_intr - Interrupt Handler
1780 * @irq: interrupt number
1781 * @data: pointer to a network interface device structure
1785 ixgb_intr(int irq
, void *data
)
1787 struct net_device
*netdev
= data
;
1788 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1789 struct ixgb_hw
*hw
= &adapter
->hw
;
1790 u32 icr
= IXGB_READ_REG(hw
, ICR
);
1793 return IRQ_NONE
; /* Not our interrupt */
1795 if (unlikely(icr
& (IXGB_INT_RXSEQ
| IXGB_INT_LSC
)))
1796 if (!test_bit(__IXGB_DOWN
, &adapter
->flags
))
1797 mod_timer(&adapter
->watchdog_timer
, jiffies
);
1799 if (napi_schedule_prep(&adapter
->napi
)) {
1801 /* Disable interrupts and register for poll. The flush
1802 of the posted write is intentionally left out.
1805 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
1806 __napi_schedule(&adapter
->napi
);
1812 * ixgb_clean - NAPI Rx polling callback
1813 * @adapter: board private structure
1817 ixgb_clean(struct napi_struct
*napi
, int budget
)
1819 struct ixgb_adapter
*adapter
= container_of(napi
, struct ixgb_adapter
, napi
);
1822 ixgb_clean_tx_irq(adapter
);
1823 ixgb_clean_rx_irq(adapter
, &work_done
, budget
);
1825 /* If budget not fully consumed, exit the polling mode */
1826 if (work_done
< budget
) {
1827 napi_complete(napi
);
1828 if (!test_bit(__IXGB_DOWN
, &adapter
->flags
))
1829 ixgb_irq_enable(adapter
);
1836 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1837 * @adapter: board private structure
1841 ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
)
1843 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1844 struct net_device
*netdev
= adapter
->netdev
;
1845 struct ixgb_tx_desc
*tx_desc
, *eop_desc
;
1846 struct ixgb_buffer
*buffer_info
;
1847 unsigned int i
, eop
;
1848 bool cleaned
= false;
1850 i
= tx_ring
->next_to_clean
;
1851 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1852 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1854 while (eop_desc
->status
& IXGB_TX_DESC_STATUS_DD
) {
1856 rmb(); /* read buffer_info after eop_desc */
1857 for (cleaned
= false; !cleaned
; ) {
1858 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1859 buffer_info
= &tx_ring
->buffer_info
[i
];
1861 if (tx_desc
->popts
&
1862 (IXGB_TX_DESC_POPTS_TXSM
|
1863 IXGB_TX_DESC_POPTS_IXSM
))
1864 adapter
->hw_csum_tx_good
++;
1866 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
1868 *(u32
*)&(tx_desc
->status
) = 0;
1870 cleaned
= (i
== eop
);
1871 if (++i
== tx_ring
->count
) i
= 0;
1874 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1875 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1878 tx_ring
->next_to_clean
= i
;
1880 if (unlikely(cleaned
&& netif_carrier_ok(netdev
) &&
1881 IXGB_DESC_UNUSED(tx_ring
) >= DESC_NEEDED
)) {
1882 /* Make sure that anybody stopping the queue after this
1883 * sees the new next_to_clean. */
1886 if (netif_queue_stopped(netdev
) &&
1887 !(test_bit(__IXGB_DOWN
, &adapter
->flags
))) {
1888 netif_wake_queue(netdev
);
1889 ++adapter
->restart_queue
;
1893 if (adapter
->detect_tx_hung
) {
1894 /* detect a transmit hang in hardware, this serializes the
1895 * check with the clearing of time_stamp and movement of i */
1896 adapter
->detect_tx_hung
= false;
1897 if (tx_ring
->buffer_info
[eop
].time_stamp
&&
1898 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+ HZ
)
1899 && !(IXGB_READ_REG(&adapter
->hw
, STATUS
) &
1900 IXGB_STATUS_TXOFF
)) {
1901 /* detected Tx unit hang */
1902 netif_err(adapter
, drv
, adapter
->netdev
,
1903 "Detected Tx Unit Hang\n"
1906 " next_to_use <%x>\n"
1907 " next_to_clean <%x>\n"
1908 "buffer_info[next_to_clean]\n"
1909 " time_stamp <%lx>\n"
1910 " next_to_watch <%x>\n"
1912 " next_to_watch.status <%x>\n",
1913 IXGB_READ_REG(&adapter
->hw
, TDH
),
1914 IXGB_READ_REG(&adapter
->hw
, TDT
),
1915 tx_ring
->next_to_use
,
1916 tx_ring
->next_to_clean
,
1917 tx_ring
->buffer_info
[eop
].time_stamp
,
1921 netif_stop_queue(netdev
);
1929 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1930 * @adapter: board private structure
1931 * @rx_desc: receive descriptor
1932 * @sk_buff: socket buffer with received data
1936 ixgb_rx_checksum(struct ixgb_adapter
*adapter
,
1937 struct ixgb_rx_desc
*rx_desc
,
1938 struct sk_buff
*skb
)
1940 /* Ignore Checksum bit is set OR
1941 * TCP Checksum has not been calculated
1943 if ((rx_desc
->status
& IXGB_RX_DESC_STATUS_IXSM
) ||
1944 (!(rx_desc
->status
& IXGB_RX_DESC_STATUS_TCPCS
))) {
1945 skb_checksum_none_assert(skb
);
1949 /* At this point we know the hardware did the TCP checksum */
1950 /* now look at the TCP checksum error bit */
1951 if (rx_desc
->errors
& IXGB_RX_DESC_ERRORS_TCPE
) {
1952 /* let the stack verify checksum errors */
1953 skb_checksum_none_assert(skb
);
1954 adapter
->hw_csum_rx_error
++;
1956 /* TCP checksum is good */
1957 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1958 adapter
->hw_csum_rx_good
++;
1963 * this should improve performance for small packets with large amounts
1964 * of reassembly being done in the stack
1966 static void ixgb_check_copybreak(struct net_device
*netdev
,
1967 struct ixgb_buffer
*buffer_info
,
1968 u32 length
, struct sk_buff
**skb
)
1970 struct sk_buff
*new_skb
;
1972 if (length
> copybreak
)
1975 new_skb
= netdev_alloc_skb_ip_align(netdev
, length
);
1979 skb_copy_to_linear_data_offset(new_skb
, -NET_IP_ALIGN
,
1980 (*skb
)->data
- NET_IP_ALIGN
,
1981 length
+ NET_IP_ALIGN
);
1982 /* save the skb in buffer_info as good */
1983 buffer_info
->skb
= *skb
;
1988 * ixgb_clean_rx_irq - Send received data up the network stack,
1989 * @adapter: board private structure
1993 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
, int *work_done
, int work_to_do
)
1995 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1996 struct net_device
*netdev
= adapter
->netdev
;
1997 struct pci_dev
*pdev
= adapter
->pdev
;
1998 struct ixgb_rx_desc
*rx_desc
, *next_rxd
;
1999 struct ixgb_buffer
*buffer_info
, *next_buffer
, *next2_buffer
;
2002 int cleaned_count
= 0;
2003 bool cleaned
= false;
2005 i
= rx_ring
->next_to_clean
;
2006 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
2007 buffer_info
= &rx_ring
->buffer_info
[i
];
2009 while (rx_desc
->status
& IXGB_RX_DESC_STATUS_DD
) {
2010 struct sk_buff
*skb
;
2013 if (*work_done
>= work_to_do
)
2017 rmb(); /* read descriptor and rx_buffer_info after status DD */
2018 status
= rx_desc
->status
;
2019 skb
= buffer_info
->skb
;
2020 buffer_info
->skb
= NULL
;
2022 prefetch(skb
->data
- NET_IP_ALIGN
);
2024 if (++i
== rx_ring
->count
)
2026 next_rxd
= IXGB_RX_DESC(*rx_ring
, i
);
2030 if (j
== rx_ring
->count
)
2032 next2_buffer
= &rx_ring
->buffer_info
[j
];
2033 prefetch(next2_buffer
);
2035 next_buffer
= &rx_ring
->buffer_info
[i
];
2040 dma_unmap_single(&pdev
->dev
,
2042 buffer_info
->length
,
2044 buffer_info
->dma
= 0;
2046 length
= le16_to_cpu(rx_desc
->length
);
2047 rx_desc
->length
= 0;
2049 if (unlikely(!(status
& IXGB_RX_DESC_STATUS_EOP
))) {
2051 /* All receives must fit into a single buffer */
2053 pr_debug("Receive packet consumed multiple buffers length<%x>\n",
2056 dev_kfree_skb_irq(skb
);
2060 if (unlikely(rx_desc
->errors
&
2061 (IXGB_RX_DESC_ERRORS_CE
| IXGB_RX_DESC_ERRORS_SE
|
2062 IXGB_RX_DESC_ERRORS_P
| IXGB_RX_DESC_ERRORS_RXE
))) {
2063 dev_kfree_skb_irq(skb
);
2067 ixgb_check_copybreak(netdev
, buffer_info
, length
, &skb
);
2070 skb_put(skb
, length
);
2072 /* Receive Checksum Offload */
2073 ixgb_rx_checksum(adapter
, rx_desc
, skb
);
2075 skb
->protocol
= eth_type_trans(skb
, netdev
);
2076 if (status
& IXGB_RX_DESC_STATUS_VP
)
2077 __vlan_hwaccel_put_tag(skb
, htons(ETH_P_8021Q
),
2078 le16_to_cpu(rx_desc
->special
));
2080 netif_receive_skb(skb
);
2083 /* clean up descriptor, might be written over by hw */
2084 rx_desc
->status
= 0;
2086 /* return some buffers to hardware, one at a time is too slow */
2087 if (unlikely(cleaned_count
>= IXGB_RX_BUFFER_WRITE
)) {
2088 ixgb_alloc_rx_buffers(adapter
, cleaned_count
);
2092 /* use prefetched values */
2094 buffer_info
= next_buffer
;
2097 rx_ring
->next_to_clean
= i
;
2099 cleaned_count
= IXGB_DESC_UNUSED(rx_ring
);
2101 ixgb_alloc_rx_buffers(adapter
, cleaned_count
);
2107 * ixgb_alloc_rx_buffers - Replace used receive buffers
2108 * @adapter: address of board private structure
2112 ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
, int cleaned_count
)
2114 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
2115 struct net_device
*netdev
= adapter
->netdev
;
2116 struct pci_dev
*pdev
= adapter
->pdev
;
2117 struct ixgb_rx_desc
*rx_desc
;
2118 struct ixgb_buffer
*buffer_info
;
2119 struct sk_buff
*skb
;
2123 i
= rx_ring
->next_to_use
;
2124 buffer_info
= &rx_ring
->buffer_info
[i
];
2125 cleancount
= IXGB_DESC_UNUSED(rx_ring
);
2128 /* leave three descriptors unused */
2129 while (--cleancount
> 2 && cleaned_count
--) {
2130 /* recycle! its good for you */
2131 skb
= buffer_info
->skb
;
2137 skb
= netdev_alloc_skb_ip_align(netdev
, adapter
->rx_buffer_len
);
2138 if (unlikely(!skb
)) {
2139 /* Better luck next round */
2140 adapter
->alloc_rx_buff_failed
++;
2144 buffer_info
->skb
= skb
;
2145 buffer_info
->length
= adapter
->rx_buffer_len
;
2147 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
2149 adapter
->rx_buffer_len
,
2151 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
2152 adapter
->alloc_rx_buff_failed
++;
2156 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
2157 rx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
2158 /* guarantee DD bit not set now before h/w gets descriptor
2159 * this is the rest of the workaround for h/w double
2161 rx_desc
->status
= 0;
2164 if (++i
== rx_ring
->count
)
2166 buffer_info
= &rx_ring
->buffer_info
[i
];
2169 if (likely(rx_ring
->next_to_use
!= i
)) {
2170 rx_ring
->next_to_use
= i
;
2171 if (unlikely(i
-- == 0))
2172 i
= (rx_ring
->count
- 1);
2174 /* Force memory writes to complete before letting h/w
2175 * know there are new descriptors to fetch. (Only
2176 * applicable for weak-ordered memory model archs, such
2179 IXGB_WRITE_REG(&adapter
->hw
, RDT
, i
);
2184 ixgb_vlan_strip_enable(struct ixgb_adapter
*adapter
)
2188 /* enable VLAN tag insert/strip */
2189 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2190 ctrl
|= IXGB_CTRL0_VME
;
2191 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2195 ixgb_vlan_strip_disable(struct ixgb_adapter
*adapter
)
2199 /* disable VLAN tag insert/strip */
2200 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2201 ctrl
&= ~IXGB_CTRL0_VME
;
2202 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2206 ixgb_vlan_rx_add_vid(struct net_device
*netdev
, __be16 proto
, u16 vid
)
2208 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2211 /* add VID to filter table */
2213 index
= (vid
>> 5) & 0x7F;
2214 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2215 vfta
|= (1 << (vid
& 0x1F));
2216 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2217 set_bit(vid
, adapter
->active_vlans
);
2223 ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, __be16 proto
, u16 vid
)
2225 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2228 /* remove VID from filter table */
2230 index
= (vid
>> 5) & 0x7F;
2231 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2232 vfta
&= ~(1 << (vid
& 0x1F));
2233 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2234 clear_bit(vid
, adapter
->active_vlans
);
2240 ixgb_restore_vlan(struct ixgb_adapter
*adapter
)
2244 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
2245 ixgb_vlan_rx_add_vid(adapter
->netdev
, htons(ETH_P_8021Q
), vid
);
2248 #ifdef CONFIG_NET_POLL_CONTROLLER
2250 * Polling 'interrupt' - used by things like netconsole to send skbs
2251 * without having to re-enable interrupts. It's not called while
2252 * the interrupt routine is executing.
2255 static void ixgb_netpoll(struct net_device
*dev
)
2257 struct ixgb_adapter
*adapter
= netdev_priv(dev
);
2259 disable_irq(adapter
->pdev
->irq
);
2260 ixgb_intr(adapter
->pdev
->irq
, dev
);
2261 enable_irq(adapter
->pdev
->irq
);
2266 * ixgb_io_error_detected - called when PCI error is detected
2267 * @pdev: pointer to pci device with error
2268 * @state: pci channel state after error
2270 * This callback is called by the PCI subsystem whenever
2271 * a PCI bus error is detected.
2273 static pci_ers_result_t
ixgb_io_error_detected(struct pci_dev
*pdev
,
2274 enum pci_channel_state state
)
2276 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2277 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2279 netif_device_detach(netdev
);
2281 if (state
== pci_channel_io_perm_failure
)
2282 return PCI_ERS_RESULT_DISCONNECT
;
2284 if (netif_running(netdev
))
2285 ixgb_down(adapter
, true);
2287 pci_disable_device(pdev
);
2289 /* Request a slot reset. */
2290 return PCI_ERS_RESULT_NEED_RESET
;
2294 * ixgb_io_slot_reset - called after the pci bus has been reset.
2295 * @pdev pointer to pci device with error
2297 * This callback is called after the PCI bus has been reset.
2298 * Basically, this tries to restart the card from scratch.
2299 * This is a shortened version of the device probe/discovery code,
2300 * it resembles the first-half of the ixgb_probe() routine.
2302 static pci_ers_result_t
ixgb_io_slot_reset(struct pci_dev
*pdev
)
2304 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2305 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2307 if (pci_enable_device(pdev
)) {
2308 netif_err(adapter
, probe
, adapter
->netdev
,
2309 "Cannot re-enable PCI device after reset\n");
2310 return PCI_ERS_RESULT_DISCONNECT
;
2313 /* Perform card reset only on one instance of the card */
2314 if (0 != PCI_FUNC (pdev
->devfn
))
2315 return PCI_ERS_RESULT_RECOVERED
;
2317 pci_set_master(pdev
);
2319 netif_carrier_off(netdev
);
2320 netif_stop_queue(netdev
);
2321 ixgb_reset(adapter
);
2323 /* Make sure the EEPROM is good */
2324 if (!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
2325 netif_err(adapter
, probe
, adapter
->netdev
,
2326 "After reset, the EEPROM checksum is not valid\n");
2327 return PCI_ERS_RESULT_DISCONNECT
;
2329 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
2330 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
2332 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
2333 netif_err(adapter
, probe
, adapter
->netdev
,
2334 "After reset, invalid MAC address\n");
2335 return PCI_ERS_RESULT_DISCONNECT
;
2338 return PCI_ERS_RESULT_RECOVERED
;
2342 * ixgb_io_resume - called when its OK to resume normal operations
2343 * @pdev pointer to pci device with error
2345 * The error recovery driver tells us that its OK to resume
2346 * normal operation. Implementation resembles the second-half
2347 * of the ixgb_probe() routine.
2349 static void ixgb_io_resume(struct pci_dev
*pdev
)
2351 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2352 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2354 pci_set_master(pdev
);
2356 if (netif_running(netdev
)) {
2357 if (ixgb_up(adapter
)) {
2358 pr_err("can't bring device back up after reset\n");
2363 netif_device_attach(netdev
);
2364 mod_timer(&adapter
->watchdog_timer
, jiffies
);