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
);
324 static const struct net_device_ops ixgb_netdev_ops
= {
325 .ndo_open
= ixgb_open
,
326 .ndo_stop
= ixgb_close
,
327 .ndo_start_xmit
= ixgb_xmit_frame
,
328 .ndo_get_stats
= ixgb_get_stats
,
329 .ndo_set_multicast_list
= ixgb_set_multi
,
330 .ndo_validate_addr
= eth_validate_addr
,
331 .ndo_set_mac_address
= ixgb_set_mac
,
332 .ndo_change_mtu
= ixgb_change_mtu
,
333 .ndo_tx_timeout
= ixgb_tx_timeout
,
334 .ndo_vlan_rx_register
= ixgb_vlan_rx_register
,
335 .ndo_vlan_rx_add_vid
= ixgb_vlan_rx_add_vid
,
336 .ndo_vlan_rx_kill_vid
= ixgb_vlan_rx_kill_vid
,
337 #ifdef CONFIG_NET_POLL_CONTROLLER
338 .ndo_poll_controller
= ixgb_netpoll
,
343 * ixgb_probe - Device Initialization Routine
344 * @pdev: PCI device information struct
345 * @ent: entry in ixgb_pci_tbl
347 * Returns 0 on success, negative on failure
349 * ixgb_probe initializes an adapter identified by a pci_dev structure.
350 * The OS initialization, configuring of the adapter private structure,
351 * and a hardware reset occur.
355 ixgb_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
357 struct net_device
*netdev
= NULL
;
358 struct ixgb_adapter
*adapter
;
359 static int cards_found
= 0;
364 err
= pci_enable_device(pdev
);
368 if (!(err
= pci_set_dma_mask(pdev
, DMA_64BIT_MASK
)) &&
369 !(err
= pci_set_consistent_dma_mask(pdev
, DMA_64BIT_MASK
))) {
372 if ((err
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
)) ||
373 (err
= pci_set_consistent_dma_mask(pdev
, DMA_32BIT_MASK
))) {
375 "ixgb: No usable DMA configuration, aborting\n");
381 err
= pci_request_regions(pdev
, ixgb_driver_name
);
383 goto err_request_regions
;
385 pci_set_master(pdev
);
387 netdev
= alloc_etherdev(sizeof(struct ixgb_adapter
));
390 goto err_alloc_etherdev
;
393 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
395 pci_set_drvdata(pdev
, netdev
);
396 adapter
= netdev_priv(netdev
);
397 adapter
->netdev
= netdev
;
398 adapter
->pdev
= pdev
;
399 adapter
->hw
.back
= adapter
;
400 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_DEBUG_LEVEL_SHIFT
);
402 adapter
->hw
.hw_addr
= pci_ioremap_bar(pdev
, BAR_0
);
403 if (!adapter
->hw
.hw_addr
) {
408 for (i
= BAR_1
; i
<= BAR_5
; i
++) {
409 if (pci_resource_len(pdev
, i
) == 0)
411 if (pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
412 adapter
->hw
.io_base
= pci_resource_start(pdev
, i
);
417 netdev
->netdev_ops
= &ixgb_netdev_ops
;
418 ixgb_set_ethtool_ops(netdev
);
419 netdev
->watchdog_timeo
= 5 * HZ
;
420 netif_napi_add(netdev
, &adapter
->napi
, ixgb_clean
, 64);
422 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
424 adapter
->bd_number
= cards_found
;
425 adapter
->link_speed
= 0;
426 adapter
->link_duplex
= 0;
428 /* setup the private structure */
430 err
= ixgb_sw_init(adapter
);
434 netdev
->features
= NETIF_F_SG
|
438 NETIF_F_HW_VLAN_FILTER
;
439 netdev
->features
|= NETIF_F_TSO
;
442 netdev
->features
|= NETIF_F_HIGHDMA
;
444 /* make sure the EEPROM is good */
446 if (!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
447 DPRINTK(PROBE
, ERR
, "The EEPROM Checksum Is Not Valid\n");
452 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
453 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
455 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
456 DPRINTK(PROBE
, ERR
, "Invalid MAC Address\n");
461 adapter
->part_num
= ixgb_get_ee_pba_number(&adapter
->hw
);
463 init_timer(&adapter
->watchdog_timer
);
464 adapter
->watchdog_timer
.function
= &ixgb_watchdog
;
465 adapter
->watchdog_timer
.data
= (unsigned long)adapter
;
467 INIT_WORK(&adapter
->tx_timeout_task
, ixgb_tx_timeout_task
);
469 strcpy(netdev
->name
, "eth%d");
470 err
= register_netdev(netdev
);
474 /* we're going to reset, so assume we have no link for now */
476 netif_carrier_off(netdev
);
477 netif_stop_queue(netdev
);
479 DPRINTK(PROBE
, INFO
, "Intel(R) PRO/10GbE Network Connection\n");
480 ixgb_check_options(adapter
);
481 /* reset the hardware with the new settings */
491 iounmap(adapter
->hw
.hw_addr
);
495 pci_release_regions(pdev
);
498 pci_disable_device(pdev
);
503 * ixgb_remove - Device Removal Routine
504 * @pdev: PCI device information struct
506 * ixgb_remove is called by the PCI subsystem to alert the driver
507 * that it should release a PCI device. The could be caused by a
508 * Hot-Plug event, or because the driver is going to be removed from
512 static void __devexit
513 ixgb_remove(struct pci_dev
*pdev
)
515 struct net_device
*netdev
= pci_get_drvdata(pdev
);
516 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
518 flush_scheduled_work();
520 unregister_netdev(netdev
);
522 iounmap(adapter
->hw
.hw_addr
);
523 pci_release_regions(pdev
);
529 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
530 * @adapter: board private structure to initialize
532 * ixgb_sw_init initializes the Adapter private data structure.
533 * Fields are initialized based on PCI device information and
534 * OS network device settings (MTU size).
538 ixgb_sw_init(struct ixgb_adapter
*adapter
)
540 struct ixgb_hw
*hw
= &adapter
->hw
;
541 struct net_device
*netdev
= adapter
->netdev
;
542 struct pci_dev
*pdev
= adapter
->pdev
;
544 /* PCI config space info */
546 hw
->vendor_id
= pdev
->vendor
;
547 hw
->device_id
= pdev
->device
;
548 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
549 hw
->subsystem_id
= pdev
->subsystem_device
;
551 hw
->max_frame_size
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
552 adapter
->rx_buffer_len
= hw
->max_frame_size
+ 8; /* + 8 for errata */
554 if ((hw
->device_id
== IXGB_DEVICE_ID_82597EX
)
555 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_CX4
)
556 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_LR
)
557 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_SR
))
558 hw
->mac_type
= ixgb_82597
;
560 /* should never have loaded on this device */
561 DPRINTK(PROBE
, ERR
, "unsupported device id\n");
564 /* enable flow control to be programmed */
567 set_bit(__IXGB_DOWN
, &adapter
->flags
);
572 * ixgb_open - Called when a network interface is made active
573 * @netdev: network interface device structure
575 * Returns 0 on success, negative value on failure
577 * The open entry point is called when a network interface is made
578 * active by the system (IFF_UP). At this point all resources needed
579 * for transmit and receive operations are allocated, the interrupt
580 * handler is registered with the OS, the watchdog timer is started,
581 * and the stack is notified that the interface is ready.
585 ixgb_open(struct net_device
*netdev
)
587 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
590 /* allocate transmit descriptors */
591 err
= ixgb_setup_tx_resources(adapter
);
595 /* allocate receive descriptors */
597 err
= ixgb_setup_rx_resources(adapter
);
601 err
= ixgb_up(adapter
);
608 ixgb_free_rx_resources(adapter
);
610 ixgb_free_tx_resources(adapter
);
618 * ixgb_close - Disables a network interface
619 * @netdev: network interface device structure
621 * Returns 0, this is not allowed to fail
623 * The close entry point is called when an interface is de-activated
624 * by the OS. The hardware is still under the drivers control, but
625 * needs to be disabled. A global MAC reset is issued to stop the
626 * hardware, and all transmit and receive resources are freed.
630 ixgb_close(struct net_device
*netdev
)
632 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
634 ixgb_down(adapter
, true);
636 ixgb_free_tx_resources(adapter
);
637 ixgb_free_rx_resources(adapter
);
643 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
644 * @adapter: board private structure
646 * Return 0 on success, negative on failure
650 ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
)
652 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
653 struct pci_dev
*pdev
= adapter
->pdev
;
656 size
= sizeof(struct ixgb_buffer
) * txdr
->count
;
657 txdr
->buffer_info
= vmalloc(size
);
658 if (!txdr
->buffer_info
) {
660 "Unable to allocate transmit descriptor ring memory\n");
663 memset(txdr
->buffer_info
, 0, size
);
665 /* round up to nearest 4K */
667 txdr
->size
= txdr
->count
* sizeof(struct ixgb_tx_desc
);
668 txdr
->size
= ALIGN(txdr
->size
, 4096);
670 txdr
->desc
= pci_alloc_consistent(pdev
, txdr
->size
, &txdr
->dma
);
672 vfree(txdr
->buffer_info
);
674 "Unable to allocate transmit descriptor memory\n");
677 memset(txdr
->desc
, 0, txdr
->size
);
679 txdr
->next_to_use
= 0;
680 txdr
->next_to_clean
= 0;
686 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
687 * @adapter: board private structure
689 * Configure the Tx unit of the MAC after a reset.
693 ixgb_configure_tx(struct ixgb_adapter
*adapter
)
695 u64 tdba
= adapter
->tx_ring
.dma
;
696 u32 tdlen
= adapter
->tx_ring
.count
* sizeof(struct ixgb_tx_desc
);
698 struct ixgb_hw
*hw
= &adapter
->hw
;
700 /* Setup the Base and Length of the Tx Descriptor Ring
701 * tx_ring.dma can be either a 32 or 64 bit value
704 IXGB_WRITE_REG(hw
, TDBAL
, (tdba
& 0x00000000ffffffffULL
));
705 IXGB_WRITE_REG(hw
, TDBAH
, (tdba
>> 32));
707 IXGB_WRITE_REG(hw
, TDLEN
, tdlen
);
709 /* Setup the HW Tx Head and Tail descriptor pointers */
711 IXGB_WRITE_REG(hw
, TDH
, 0);
712 IXGB_WRITE_REG(hw
, TDT
, 0);
714 /* don't set up txdctl, it induces performance problems if configured
716 /* Set the Tx Interrupt Delay register */
718 IXGB_WRITE_REG(hw
, TIDV
, adapter
->tx_int_delay
);
720 /* Program the Transmit Control Register */
722 tctl
= IXGB_TCTL_TCE
| IXGB_TCTL_TXEN
| IXGB_TCTL_TPDE
;
723 IXGB_WRITE_REG(hw
, TCTL
, tctl
);
725 /* Setup Transmit Descriptor Settings for this adapter */
726 adapter
->tx_cmd_type
=
728 (adapter
->tx_int_delay_enable
? IXGB_TX_DESC_CMD_IDE
: 0);
732 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
733 * @adapter: board private structure
735 * Returns 0 on success, negative on failure
739 ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
)
741 struct ixgb_desc_ring
*rxdr
= &adapter
->rx_ring
;
742 struct pci_dev
*pdev
= adapter
->pdev
;
745 size
= sizeof(struct ixgb_buffer
) * rxdr
->count
;
746 rxdr
->buffer_info
= vmalloc(size
);
747 if (!rxdr
->buffer_info
) {
749 "Unable to allocate receive descriptor ring\n");
752 memset(rxdr
->buffer_info
, 0, size
);
754 /* Round up to nearest 4K */
756 rxdr
->size
= rxdr
->count
* sizeof(struct ixgb_rx_desc
);
757 rxdr
->size
= ALIGN(rxdr
->size
, 4096);
759 rxdr
->desc
= pci_alloc_consistent(pdev
, rxdr
->size
, &rxdr
->dma
);
762 vfree(rxdr
->buffer_info
);
764 "Unable to allocate receive descriptors\n");
767 memset(rxdr
->desc
, 0, rxdr
->size
);
769 rxdr
->next_to_clean
= 0;
770 rxdr
->next_to_use
= 0;
776 * ixgb_setup_rctl - configure the receive control register
777 * @adapter: Board private structure
781 ixgb_setup_rctl(struct ixgb_adapter
*adapter
)
785 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
787 rctl
&= ~(3 << IXGB_RCTL_MO_SHIFT
);
790 IXGB_RCTL_BAM
| IXGB_RCTL_RDMTS_1_2
|
791 IXGB_RCTL_RXEN
| IXGB_RCTL_CFF
|
792 (adapter
->hw
.mc_filter_type
<< IXGB_RCTL_MO_SHIFT
);
794 rctl
|= IXGB_RCTL_SECRC
;
796 if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_2048
)
797 rctl
|= IXGB_RCTL_BSIZE_2048
;
798 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_4096
)
799 rctl
|= IXGB_RCTL_BSIZE_4096
;
800 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_8192
)
801 rctl
|= IXGB_RCTL_BSIZE_8192
;
802 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_16384
)
803 rctl
|= IXGB_RCTL_BSIZE_16384
;
805 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
809 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
810 * @adapter: board private structure
812 * Configure the Rx unit of the MAC after a reset.
816 ixgb_configure_rx(struct ixgb_adapter
*adapter
)
818 u64 rdba
= adapter
->rx_ring
.dma
;
819 u32 rdlen
= adapter
->rx_ring
.count
* sizeof(struct ixgb_rx_desc
);
820 struct ixgb_hw
*hw
= &adapter
->hw
;
824 /* make sure receives are disabled while setting up the descriptors */
826 rctl
= IXGB_READ_REG(hw
, RCTL
);
827 IXGB_WRITE_REG(hw
, RCTL
, rctl
& ~IXGB_RCTL_RXEN
);
829 /* set the Receive Delay Timer Register */
831 IXGB_WRITE_REG(hw
, RDTR
, adapter
->rx_int_delay
);
833 /* Setup the Base and Length of the Rx Descriptor Ring */
835 IXGB_WRITE_REG(hw
, RDBAL
, (rdba
& 0x00000000ffffffffULL
));
836 IXGB_WRITE_REG(hw
, RDBAH
, (rdba
>> 32));
838 IXGB_WRITE_REG(hw
, RDLEN
, rdlen
);
840 /* Setup the HW Rx Head and Tail Descriptor Pointers */
841 IXGB_WRITE_REG(hw
, RDH
, 0);
842 IXGB_WRITE_REG(hw
, RDT
, 0);
844 /* due to the hardware errata with RXDCTL, we are unable to use any of
845 * the performance enhancing features of it without causing other
846 * subtle bugs, some of the bugs could include receive length
847 * corruption at high data rates (WTHRESH > 0) and/or receive
848 * descriptor ring irregularites (particularly in hardware cache) */
849 IXGB_WRITE_REG(hw
, RXDCTL
, 0);
851 /* Enable Receive Checksum Offload for TCP and UDP */
852 if (adapter
->rx_csum
) {
853 rxcsum
= IXGB_READ_REG(hw
, RXCSUM
);
854 rxcsum
|= IXGB_RXCSUM_TUOFL
;
855 IXGB_WRITE_REG(hw
, RXCSUM
, rxcsum
);
858 /* Enable Receives */
860 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
864 * ixgb_free_tx_resources - Free Tx Resources
865 * @adapter: board private structure
867 * Free all transmit software resources
871 ixgb_free_tx_resources(struct ixgb_adapter
*adapter
)
873 struct pci_dev
*pdev
= adapter
->pdev
;
875 ixgb_clean_tx_ring(adapter
);
877 vfree(adapter
->tx_ring
.buffer_info
);
878 adapter
->tx_ring
.buffer_info
= NULL
;
880 pci_free_consistent(pdev
, adapter
->tx_ring
.size
,
881 adapter
->tx_ring
.desc
, adapter
->tx_ring
.dma
);
883 adapter
->tx_ring
.desc
= NULL
;
887 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter
*adapter
,
888 struct ixgb_buffer
*buffer_info
)
890 struct pci_dev
*pdev
= adapter
->pdev
;
892 if (buffer_info
->dma
)
893 pci_unmap_page(pdev
, buffer_info
->dma
, buffer_info
->length
,
896 /* okay to call kfree_skb here instead of kfree_skb_any because
897 * this is never called in interrupt context */
898 if (buffer_info
->skb
)
899 dev_kfree_skb(buffer_info
->skb
);
901 buffer_info
->skb
= NULL
;
902 buffer_info
->dma
= 0;
903 buffer_info
->time_stamp
= 0;
904 /* these fields must always be initialized in tx
905 * buffer_info->length = 0;
906 * buffer_info->next_to_watch = 0; */
910 * ixgb_clean_tx_ring - Free Tx Buffers
911 * @adapter: board private structure
915 ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
)
917 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
918 struct ixgb_buffer
*buffer_info
;
922 /* Free all the Tx ring sk_buffs */
924 for (i
= 0; i
< tx_ring
->count
; i
++) {
925 buffer_info
= &tx_ring
->buffer_info
[i
];
926 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
929 size
= sizeof(struct ixgb_buffer
) * tx_ring
->count
;
930 memset(tx_ring
->buffer_info
, 0, size
);
932 /* Zero out the descriptor ring */
934 memset(tx_ring
->desc
, 0, tx_ring
->size
);
936 tx_ring
->next_to_use
= 0;
937 tx_ring
->next_to_clean
= 0;
939 IXGB_WRITE_REG(&adapter
->hw
, TDH
, 0);
940 IXGB_WRITE_REG(&adapter
->hw
, TDT
, 0);
944 * ixgb_free_rx_resources - Free Rx Resources
945 * @adapter: board private structure
947 * Free all receive software resources
951 ixgb_free_rx_resources(struct ixgb_adapter
*adapter
)
953 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
954 struct pci_dev
*pdev
= adapter
->pdev
;
956 ixgb_clean_rx_ring(adapter
);
958 vfree(rx_ring
->buffer_info
);
959 rx_ring
->buffer_info
= NULL
;
961 pci_free_consistent(pdev
, rx_ring
->size
, rx_ring
->desc
, rx_ring
->dma
);
963 rx_ring
->desc
= NULL
;
967 * ixgb_clean_rx_ring - Free Rx Buffers
968 * @adapter: board private structure
972 ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
)
974 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
975 struct ixgb_buffer
*buffer_info
;
976 struct pci_dev
*pdev
= adapter
->pdev
;
980 /* Free all the Rx ring sk_buffs */
982 for (i
= 0; i
< rx_ring
->count
; i
++) {
983 buffer_info
= &rx_ring
->buffer_info
[i
];
984 if (buffer_info
->dma
) {
985 pci_unmap_single(pdev
,
989 buffer_info
->dma
= 0;
990 buffer_info
->length
= 0;
993 if (buffer_info
->skb
) {
994 dev_kfree_skb(buffer_info
->skb
);
995 buffer_info
->skb
= NULL
;
999 size
= sizeof(struct ixgb_buffer
) * rx_ring
->count
;
1000 memset(rx_ring
->buffer_info
, 0, size
);
1002 /* Zero out the descriptor ring */
1004 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1006 rx_ring
->next_to_clean
= 0;
1007 rx_ring
->next_to_use
= 0;
1009 IXGB_WRITE_REG(&adapter
->hw
, RDH
, 0);
1010 IXGB_WRITE_REG(&adapter
->hw
, RDT
, 0);
1014 * ixgb_set_mac - Change the Ethernet Address of the NIC
1015 * @netdev: network interface device structure
1016 * @p: pointer to an address structure
1018 * Returns 0 on success, negative on failure
1022 ixgb_set_mac(struct net_device
*netdev
, void *p
)
1024 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1025 struct sockaddr
*addr
= p
;
1027 if (!is_valid_ether_addr(addr
->sa_data
))
1028 return -EADDRNOTAVAIL
;
1030 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1032 ixgb_rar_set(&adapter
->hw
, addr
->sa_data
, 0);
1038 * ixgb_set_multi - Multicast and Promiscuous mode set
1039 * @netdev: network interface device structure
1041 * The set_multi entry point is called whenever the multicast address
1042 * list or the network interface flags are updated. This routine is
1043 * responsible for configuring the hardware for proper multicast,
1044 * promiscuous mode, and all-multi behavior.
1048 ixgb_set_multi(struct net_device
*netdev
)
1050 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1051 struct ixgb_hw
*hw
= &adapter
->hw
;
1052 struct dev_mc_list
*mc_ptr
;
1056 /* Check for Promiscuous and All Multicast modes */
1058 rctl
= IXGB_READ_REG(hw
, RCTL
);
1060 if (netdev
->flags
& IFF_PROMISC
) {
1061 rctl
|= (IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1062 rctl
&= ~IXGB_RCTL_VFE
;
1064 if (netdev
->flags
& IFF_ALLMULTI
) {
1065 rctl
|= IXGB_RCTL_MPE
;
1066 rctl
&= ~IXGB_RCTL_UPE
;
1068 rctl
&= ~(IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1070 rctl
|= IXGB_RCTL_VFE
;
1073 if (netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
) {
1074 rctl
|= IXGB_RCTL_MPE
;
1075 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1077 u8 mta
[IXGB_MAX_NUM_MULTICAST_ADDRESSES
*
1078 IXGB_ETH_LENGTH_OF_ADDRESS
];
1080 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1082 for (i
= 0, mc_ptr
= netdev
->mc_list
;
1084 i
++, mc_ptr
= mc_ptr
->next
)
1085 memcpy(&mta
[i
* IXGB_ETH_LENGTH_OF_ADDRESS
],
1086 mc_ptr
->dmi_addr
, IXGB_ETH_LENGTH_OF_ADDRESS
);
1088 ixgb_mc_addr_list_update(hw
, mta
, netdev
->mc_count
, 0);
1093 * ixgb_watchdog - Timer Call-back
1094 * @data: pointer to netdev cast into an unsigned long
1098 ixgb_watchdog(unsigned long data
)
1100 struct ixgb_adapter
*adapter
= (struct ixgb_adapter
*)data
;
1101 struct net_device
*netdev
= adapter
->netdev
;
1102 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
1104 ixgb_check_for_link(&adapter
->hw
);
1106 if (ixgb_check_for_bad_link(&adapter
->hw
)) {
1107 /* force the reset path */
1108 netif_stop_queue(netdev
);
1111 if (adapter
->hw
.link_up
) {
1112 if (!netif_carrier_ok(netdev
)) {
1114 "NIC Link is Up 10000 Mbps Full Duplex\n");
1115 adapter
->link_speed
= 10000;
1116 adapter
->link_duplex
= FULL_DUPLEX
;
1117 netif_carrier_on(netdev
);
1118 netif_wake_queue(netdev
);
1121 if (netif_carrier_ok(netdev
)) {
1122 adapter
->link_speed
= 0;
1123 adapter
->link_duplex
= 0;
1124 DPRINTK(LINK
, INFO
, "NIC Link is Down\n");
1125 netif_carrier_off(netdev
);
1126 netif_stop_queue(netdev
);
1131 ixgb_update_stats(adapter
);
1133 if (!netif_carrier_ok(netdev
)) {
1134 if (IXGB_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
1135 /* We've lost link, so the controller stops DMA,
1136 * but we've got queued Tx work that's never going
1137 * to get done, so reset controller to flush Tx.
1138 * (Do the reset outside of interrupt context). */
1139 schedule_work(&adapter
->tx_timeout_task
);
1143 /* Force detection of hung controller every watchdog period */
1144 adapter
->detect_tx_hung
= true;
1146 /* generate an interrupt to force clean up of any stragglers */
1147 IXGB_WRITE_REG(&adapter
->hw
, ICS
, IXGB_INT_TXDW
);
1149 /* Reset the timer */
1150 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 2 * HZ
);
1153 #define IXGB_TX_FLAGS_CSUM 0x00000001
1154 #define IXGB_TX_FLAGS_VLAN 0x00000002
1155 #define IXGB_TX_FLAGS_TSO 0x00000004
1158 ixgb_tso(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1160 struct ixgb_context_desc
*context_desc
;
1162 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
1163 u16 ipcse
, tucse
, mss
;
1166 if (likely(skb_is_gso(skb
))) {
1167 struct ixgb_buffer
*buffer_info
;
1170 if (skb_header_cloned(skb
)) {
1171 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
1176 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
1177 mss
= skb_shinfo(skb
)->gso_size
;
1181 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
1184 ipcss
= skb_network_offset(skb
);
1185 ipcso
= (void *)&(iph
->check
) - (void *)skb
->data
;
1186 ipcse
= skb_transport_offset(skb
) - 1;
1187 tucss
= skb_transport_offset(skb
);
1188 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
1191 i
= adapter
->tx_ring
.next_to_use
;
1192 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1193 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1194 WARN_ON(buffer_info
->dma
!= 0);
1196 context_desc
->ipcss
= ipcss
;
1197 context_desc
->ipcso
= ipcso
;
1198 context_desc
->ipcse
= cpu_to_le16(ipcse
);
1199 context_desc
->tucss
= tucss
;
1200 context_desc
->tucso
= tucso
;
1201 context_desc
->tucse
= cpu_to_le16(tucse
);
1202 context_desc
->mss
= cpu_to_le16(mss
);
1203 context_desc
->hdr_len
= hdr_len
;
1204 context_desc
->status
= 0;
1205 context_desc
->cmd_type_len
= cpu_to_le32(
1206 IXGB_CONTEXT_DESC_TYPE
1207 | IXGB_CONTEXT_DESC_CMD_TSE
1208 | IXGB_CONTEXT_DESC_CMD_IP
1209 | IXGB_CONTEXT_DESC_CMD_TCP
1210 | IXGB_CONTEXT_DESC_CMD_IDE
1211 | (skb
->len
- (hdr_len
)));
1214 if (++i
== adapter
->tx_ring
.count
) i
= 0;
1215 adapter
->tx_ring
.next_to_use
= i
;
1224 ixgb_tx_csum(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1226 struct ixgb_context_desc
*context_desc
;
1230 if (likely(skb
->ip_summed
== CHECKSUM_PARTIAL
)) {
1231 struct ixgb_buffer
*buffer_info
;
1232 css
= skb_transport_offset(skb
);
1233 cso
= css
+ skb
->csum_offset
;
1235 i
= adapter
->tx_ring
.next_to_use
;
1236 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1237 buffer_info
= &adapter
->tx_ring
.buffer_info
[i
];
1238 WARN_ON(buffer_info
->dma
!= 0);
1240 context_desc
->tucss
= css
;
1241 context_desc
->tucso
= cso
;
1242 context_desc
->tucse
= 0;
1243 /* zero out any previously existing data in one instruction */
1244 *(u32
*)&(context_desc
->ipcss
) = 0;
1245 context_desc
->status
= 0;
1246 context_desc
->hdr_len
= 0;
1247 context_desc
->mss
= 0;
1248 context_desc
->cmd_type_len
=
1249 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1250 | IXGB_TX_DESC_CMD_IDE
);
1252 if (++i
== adapter
->tx_ring
.count
) i
= 0;
1253 adapter
->tx_ring
.next_to_use
= i
;
1261 #define IXGB_MAX_TXD_PWR 14
1262 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1265 ixgb_tx_map(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
,
1268 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1269 struct ixgb_buffer
*buffer_info
;
1271 unsigned int offset
= 0, size
, count
= 0, i
;
1272 unsigned int mss
= skb_shinfo(skb
)->gso_size
;
1274 unsigned int nr_frags
= skb_shinfo(skb
)->nr_frags
;
1277 len
-= skb
->data_len
;
1279 i
= tx_ring
->next_to_use
;
1282 buffer_info
= &tx_ring
->buffer_info
[i
];
1283 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1284 /* Workaround for premature desc write-backs
1285 * in TSO mode. Append 4-byte sentinel desc */
1286 if (unlikely(mss
&& !nr_frags
&& size
== len
&& size
> 8))
1289 buffer_info
->length
= size
;
1290 WARN_ON(buffer_info
->dma
!= 0);
1291 buffer_info
->time_stamp
= jiffies
;
1293 pci_map_single(adapter
->pdev
,
1297 buffer_info
->next_to_watch
= 0;
1302 if (++i
== tx_ring
->count
) i
= 0;
1305 for (f
= 0; f
< nr_frags
; f
++) {
1306 struct skb_frag_struct
*frag
;
1308 frag
= &skb_shinfo(skb
)->frags
[f
];
1313 buffer_info
= &tx_ring
->buffer_info
[i
];
1314 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1316 /* Workaround for premature desc write-backs
1317 * in TSO mode. Append 4-byte sentinel desc */
1318 if (unlikely(mss
&& (f
== (nr_frags
- 1))
1319 && size
== len
&& size
> 8))
1322 buffer_info
->length
= size
;
1323 buffer_info
->time_stamp
= jiffies
;
1325 pci_map_page(adapter
->pdev
,
1327 frag
->page_offset
+ offset
,
1330 buffer_info
->next_to_watch
= 0;
1335 if (++i
== tx_ring
->count
) i
= 0;
1338 i
= (i
== 0) ? tx_ring
->count
- 1 : i
- 1;
1339 tx_ring
->buffer_info
[i
].skb
= skb
;
1340 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
1346 ixgb_tx_queue(struct ixgb_adapter
*adapter
, int count
, int vlan_id
,int tx_flags
)
1348 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1349 struct ixgb_tx_desc
*tx_desc
= NULL
;
1350 struct ixgb_buffer
*buffer_info
;
1351 u32 cmd_type_len
= adapter
->tx_cmd_type
;
1356 if (tx_flags
& IXGB_TX_FLAGS_TSO
) {
1357 cmd_type_len
|= IXGB_TX_DESC_CMD_TSE
;
1358 popts
|= (IXGB_TX_DESC_POPTS_IXSM
| IXGB_TX_DESC_POPTS_TXSM
);
1361 if (tx_flags
& IXGB_TX_FLAGS_CSUM
)
1362 popts
|= IXGB_TX_DESC_POPTS_TXSM
;
1364 if (tx_flags
& IXGB_TX_FLAGS_VLAN
)
1365 cmd_type_len
|= IXGB_TX_DESC_CMD_VLE
;
1367 i
= tx_ring
->next_to_use
;
1370 buffer_info
= &tx_ring
->buffer_info
[i
];
1371 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1372 tx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
1373 tx_desc
->cmd_type_len
=
1374 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
1375 tx_desc
->status
= status
;
1376 tx_desc
->popts
= popts
;
1377 tx_desc
->vlan
= cpu_to_le16(vlan_id
);
1379 if (++i
== tx_ring
->count
) i
= 0;
1382 tx_desc
->cmd_type_len
|=
1383 cpu_to_le32(IXGB_TX_DESC_CMD_EOP
| IXGB_TX_DESC_CMD_RS
);
1385 /* Force memory writes to complete before letting h/w
1386 * know there are new descriptors to fetch. (Only
1387 * applicable for weak-ordered memory model archs,
1388 * such as IA-64). */
1391 tx_ring
->next_to_use
= i
;
1392 IXGB_WRITE_REG(&adapter
->hw
, TDT
, i
);
1395 static int __ixgb_maybe_stop_tx(struct net_device
*netdev
, int size
)
1397 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1398 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1400 netif_stop_queue(netdev
);
1401 /* Herbert's original patch had:
1402 * smp_mb__after_netif_stop_queue();
1403 * but since that doesn't exist yet, just open code it. */
1406 /* We need to check again in a case another CPU has just
1407 * made room available. */
1408 if (likely(IXGB_DESC_UNUSED(tx_ring
) < size
))
1412 netif_start_queue(netdev
);
1413 ++adapter
->restart_queue
;
1417 static int ixgb_maybe_stop_tx(struct net_device
*netdev
,
1418 struct ixgb_desc_ring
*tx_ring
, int size
)
1420 if (likely(IXGB_DESC_UNUSED(tx_ring
) >= size
))
1422 return __ixgb_maybe_stop_tx(netdev
, size
);
1426 /* Tx Descriptors needed, worst case */
1427 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1428 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1429 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1430 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1431 + 1 /* one more needed for sentinel TSO workaround */
1434 ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
1436 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1438 unsigned int tx_flags
= 0;
1442 if (test_bit(__IXGB_DOWN
, &adapter
->flags
)) {
1444 return NETDEV_TX_OK
;
1447 if (skb
->len
<= 0) {
1452 if (unlikely(ixgb_maybe_stop_tx(netdev
, &adapter
->tx_ring
,
1454 return NETDEV_TX_BUSY
;
1456 if (adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
1457 tx_flags
|= IXGB_TX_FLAGS_VLAN
;
1458 vlan_id
= vlan_tx_tag_get(skb
);
1461 first
= adapter
->tx_ring
.next_to_use
;
1463 tso
= ixgb_tso(adapter
, skb
);
1466 return NETDEV_TX_OK
;
1470 tx_flags
|= IXGB_TX_FLAGS_TSO
;
1471 else if (ixgb_tx_csum(adapter
, skb
))
1472 tx_flags
|= IXGB_TX_FLAGS_CSUM
;
1474 ixgb_tx_queue(adapter
, ixgb_tx_map(adapter
, skb
, first
), vlan_id
,
1477 netdev
->trans_start
= jiffies
;
1479 /* Make sure there is space in the ring for the next send. */
1480 ixgb_maybe_stop_tx(netdev
, &adapter
->tx_ring
, DESC_NEEDED
);
1482 return NETDEV_TX_OK
;
1486 * ixgb_tx_timeout - Respond to a Tx Hang
1487 * @netdev: network interface device structure
1491 ixgb_tx_timeout(struct net_device
*netdev
)
1493 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1495 /* Do the reset outside of interrupt context */
1496 schedule_work(&adapter
->tx_timeout_task
);
1500 ixgb_tx_timeout_task(struct work_struct
*work
)
1502 struct ixgb_adapter
*adapter
=
1503 container_of(work
, struct ixgb_adapter
, tx_timeout_task
);
1505 adapter
->tx_timeout_count
++;
1506 ixgb_down(adapter
, true);
1511 * ixgb_get_stats - Get System Network Statistics
1512 * @netdev: network interface device structure
1514 * Returns the address of the device statistics structure.
1515 * The statistics are actually updated from the timer callback.
1518 static struct net_device_stats
*
1519 ixgb_get_stats(struct net_device
*netdev
)
1521 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1523 return &adapter
->net_stats
;
1527 * ixgb_change_mtu - Change the Maximum Transfer Unit
1528 * @netdev: network interface device structure
1529 * @new_mtu: new value for maximum frame size
1531 * Returns 0 on success, negative on failure
1535 ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
)
1537 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1538 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1539 int old_max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1541 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1542 if ((new_mtu
< 68) ||
1543 (max_frame
> IXGB_MAX_JUMBO_FRAME_SIZE
+ ENET_FCS_LENGTH
)) {
1544 DPRINTK(PROBE
, ERR
, "Invalid MTU setting %d\n", new_mtu
);
1548 if (old_max_frame
== max_frame
)
1551 if (netif_running(netdev
))
1552 ixgb_down(adapter
, true);
1554 adapter
->rx_buffer_len
= max_frame
+ 8; /* + 8 for errata */
1556 netdev
->mtu
= new_mtu
;
1558 if (netif_running(netdev
))
1565 * ixgb_update_stats - Update the board statistics counters.
1566 * @adapter: board private structure
1570 ixgb_update_stats(struct ixgb_adapter
*adapter
)
1572 struct net_device
*netdev
= adapter
->netdev
;
1573 struct pci_dev
*pdev
= adapter
->pdev
;
1575 /* Prevent stats update while adapter is being reset */
1576 if (pci_channel_offline(pdev
))
1579 if ((netdev
->flags
& IFF_PROMISC
) || (netdev
->flags
& IFF_ALLMULTI
) ||
1580 (netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
)) {
1581 u64 multi
= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1582 u32 bcast_l
= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1583 u32 bcast_h
= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1584 u64 bcast
= ((u64
)bcast_h
<< 32) | bcast_l
;
1586 multi
|= ((u64
)IXGB_READ_REG(&adapter
->hw
, MPRCH
) << 32);
1587 /* fix up multicast stats by removing broadcasts */
1591 adapter
->stats
.mprcl
+= (multi
& 0xFFFFFFFF);
1592 adapter
->stats
.mprch
+= (multi
>> 32);
1593 adapter
->stats
.bprcl
+= bcast_l
;
1594 adapter
->stats
.bprch
+= bcast_h
;
1596 adapter
->stats
.mprcl
+= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1597 adapter
->stats
.mprch
+= IXGB_READ_REG(&adapter
->hw
, MPRCH
);
1598 adapter
->stats
.bprcl
+= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1599 adapter
->stats
.bprch
+= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1601 adapter
->stats
.tprl
+= IXGB_READ_REG(&adapter
->hw
, TPRL
);
1602 adapter
->stats
.tprh
+= IXGB_READ_REG(&adapter
->hw
, TPRH
);
1603 adapter
->stats
.gprcl
+= IXGB_READ_REG(&adapter
->hw
, GPRCL
);
1604 adapter
->stats
.gprch
+= IXGB_READ_REG(&adapter
->hw
, GPRCH
);
1605 adapter
->stats
.uprcl
+= IXGB_READ_REG(&adapter
->hw
, UPRCL
);
1606 adapter
->stats
.uprch
+= IXGB_READ_REG(&adapter
->hw
, UPRCH
);
1607 adapter
->stats
.vprcl
+= IXGB_READ_REG(&adapter
->hw
, VPRCL
);
1608 adapter
->stats
.vprch
+= IXGB_READ_REG(&adapter
->hw
, VPRCH
);
1609 adapter
->stats
.jprcl
+= IXGB_READ_REG(&adapter
->hw
, JPRCL
);
1610 adapter
->stats
.jprch
+= IXGB_READ_REG(&adapter
->hw
, JPRCH
);
1611 adapter
->stats
.gorcl
+= IXGB_READ_REG(&adapter
->hw
, GORCL
);
1612 adapter
->stats
.gorch
+= IXGB_READ_REG(&adapter
->hw
, GORCH
);
1613 adapter
->stats
.torl
+= IXGB_READ_REG(&adapter
->hw
, TORL
);
1614 adapter
->stats
.torh
+= IXGB_READ_REG(&adapter
->hw
, TORH
);
1615 adapter
->stats
.rnbc
+= IXGB_READ_REG(&adapter
->hw
, RNBC
);
1616 adapter
->stats
.ruc
+= IXGB_READ_REG(&adapter
->hw
, RUC
);
1617 adapter
->stats
.roc
+= IXGB_READ_REG(&adapter
->hw
, ROC
);
1618 adapter
->stats
.rlec
+= IXGB_READ_REG(&adapter
->hw
, RLEC
);
1619 adapter
->stats
.crcerrs
+= IXGB_READ_REG(&adapter
->hw
, CRCERRS
);
1620 adapter
->stats
.icbc
+= IXGB_READ_REG(&adapter
->hw
, ICBC
);
1621 adapter
->stats
.ecbc
+= IXGB_READ_REG(&adapter
->hw
, ECBC
);
1622 adapter
->stats
.mpc
+= IXGB_READ_REG(&adapter
->hw
, MPC
);
1623 adapter
->stats
.tptl
+= IXGB_READ_REG(&adapter
->hw
, TPTL
);
1624 adapter
->stats
.tpth
+= IXGB_READ_REG(&adapter
->hw
, TPTH
);
1625 adapter
->stats
.gptcl
+= IXGB_READ_REG(&adapter
->hw
, GPTCL
);
1626 adapter
->stats
.gptch
+= IXGB_READ_REG(&adapter
->hw
, GPTCH
);
1627 adapter
->stats
.bptcl
+= IXGB_READ_REG(&adapter
->hw
, BPTCL
);
1628 adapter
->stats
.bptch
+= IXGB_READ_REG(&adapter
->hw
, BPTCH
);
1629 adapter
->stats
.mptcl
+= IXGB_READ_REG(&adapter
->hw
, MPTCL
);
1630 adapter
->stats
.mptch
+= IXGB_READ_REG(&adapter
->hw
, MPTCH
);
1631 adapter
->stats
.uptcl
+= IXGB_READ_REG(&adapter
->hw
, UPTCL
);
1632 adapter
->stats
.uptch
+= IXGB_READ_REG(&adapter
->hw
, UPTCH
);
1633 adapter
->stats
.vptcl
+= IXGB_READ_REG(&adapter
->hw
, VPTCL
);
1634 adapter
->stats
.vptch
+= IXGB_READ_REG(&adapter
->hw
, VPTCH
);
1635 adapter
->stats
.jptcl
+= IXGB_READ_REG(&adapter
->hw
, JPTCL
);
1636 adapter
->stats
.jptch
+= IXGB_READ_REG(&adapter
->hw
, JPTCH
);
1637 adapter
->stats
.gotcl
+= IXGB_READ_REG(&adapter
->hw
, GOTCL
);
1638 adapter
->stats
.gotch
+= IXGB_READ_REG(&adapter
->hw
, GOTCH
);
1639 adapter
->stats
.totl
+= IXGB_READ_REG(&adapter
->hw
, TOTL
);
1640 adapter
->stats
.toth
+= IXGB_READ_REG(&adapter
->hw
, TOTH
);
1641 adapter
->stats
.dc
+= IXGB_READ_REG(&adapter
->hw
, DC
);
1642 adapter
->stats
.plt64c
+= IXGB_READ_REG(&adapter
->hw
, PLT64C
);
1643 adapter
->stats
.tsctc
+= IXGB_READ_REG(&adapter
->hw
, TSCTC
);
1644 adapter
->stats
.tsctfc
+= IXGB_READ_REG(&adapter
->hw
, TSCTFC
);
1645 adapter
->stats
.ibic
+= IXGB_READ_REG(&adapter
->hw
, IBIC
);
1646 adapter
->stats
.rfc
+= IXGB_READ_REG(&adapter
->hw
, RFC
);
1647 adapter
->stats
.lfc
+= IXGB_READ_REG(&adapter
->hw
, LFC
);
1648 adapter
->stats
.pfrc
+= IXGB_READ_REG(&adapter
->hw
, PFRC
);
1649 adapter
->stats
.pftc
+= IXGB_READ_REG(&adapter
->hw
, PFTC
);
1650 adapter
->stats
.mcfrc
+= IXGB_READ_REG(&adapter
->hw
, MCFRC
);
1651 adapter
->stats
.mcftc
+= IXGB_READ_REG(&adapter
->hw
, MCFTC
);
1652 adapter
->stats
.xonrxc
+= IXGB_READ_REG(&adapter
->hw
, XONRXC
);
1653 adapter
->stats
.xontxc
+= IXGB_READ_REG(&adapter
->hw
, XONTXC
);
1654 adapter
->stats
.xoffrxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFRXC
);
1655 adapter
->stats
.xofftxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFTXC
);
1656 adapter
->stats
.rjc
+= IXGB_READ_REG(&adapter
->hw
, RJC
);
1658 /* Fill out the OS statistics structure */
1660 adapter
->net_stats
.rx_packets
= adapter
->stats
.gprcl
;
1661 adapter
->net_stats
.tx_packets
= adapter
->stats
.gptcl
;
1662 adapter
->net_stats
.rx_bytes
= adapter
->stats
.gorcl
;
1663 adapter
->net_stats
.tx_bytes
= adapter
->stats
.gotcl
;
1664 adapter
->net_stats
.multicast
= adapter
->stats
.mprcl
;
1665 adapter
->net_stats
.collisions
= 0;
1667 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1668 * with a length in the type/len field */
1669 adapter
->net_stats
.rx_errors
=
1670 /* adapter->stats.rnbc + */ adapter
->stats
.crcerrs
+
1671 adapter
->stats
.ruc
+
1672 adapter
->stats
.roc
/*+ adapter->stats.rlec */ +
1673 adapter
->stats
.icbc
+
1674 adapter
->stats
.ecbc
+ adapter
->stats
.mpc
;
1677 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1680 adapter
->net_stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
1681 adapter
->net_stats
.rx_fifo_errors
= adapter
->stats
.mpc
;
1682 adapter
->net_stats
.rx_missed_errors
= adapter
->stats
.mpc
;
1683 adapter
->net_stats
.rx_over_errors
= adapter
->stats
.mpc
;
1685 adapter
->net_stats
.tx_errors
= 0;
1686 adapter
->net_stats
.rx_frame_errors
= 0;
1687 adapter
->net_stats
.tx_aborted_errors
= 0;
1688 adapter
->net_stats
.tx_carrier_errors
= 0;
1689 adapter
->net_stats
.tx_fifo_errors
= 0;
1690 adapter
->net_stats
.tx_heartbeat_errors
= 0;
1691 adapter
->net_stats
.tx_window_errors
= 0;
1694 #define IXGB_MAX_INTR 10
1696 * ixgb_intr - Interrupt Handler
1697 * @irq: interrupt number
1698 * @data: pointer to a network interface device structure
1702 ixgb_intr(int irq
, void *data
)
1704 struct net_device
*netdev
= data
;
1705 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1706 struct ixgb_hw
*hw
= &adapter
->hw
;
1707 u32 icr
= IXGB_READ_REG(hw
, ICR
);
1710 return IRQ_NONE
; /* Not our interrupt */
1712 if (unlikely(icr
& (IXGB_INT_RXSEQ
| IXGB_INT_LSC
)))
1713 if (!test_bit(__IXGB_DOWN
, &adapter
->flags
))
1714 mod_timer(&adapter
->watchdog_timer
, jiffies
);
1716 if (netif_rx_schedule_prep(netdev
, &adapter
->napi
)) {
1718 /* Disable interrupts and register for poll. The flush
1719 of the posted write is intentionally left out.
1722 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
1723 __netif_rx_schedule(netdev
, &adapter
->napi
);
1729 * ixgb_clean - NAPI Rx polling callback
1730 * @adapter: board private structure
1734 ixgb_clean(struct napi_struct
*napi
, int budget
)
1736 struct ixgb_adapter
*adapter
= container_of(napi
, struct ixgb_adapter
, napi
);
1737 struct net_device
*netdev
= adapter
->netdev
;
1740 ixgb_clean_tx_irq(adapter
);
1741 ixgb_clean_rx_irq(adapter
, &work_done
, budget
);
1743 /* If budget not fully consumed, exit the polling mode */
1744 if (work_done
< budget
) {
1745 netif_rx_complete(netdev
, napi
);
1746 if (!test_bit(__IXGB_DOWN
, &adapter
->flags
))
1747 ixgb_irq_enable(adapter
);
1754 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1755 * @adapter: board private structure
1759 ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
)
1761 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1762 struct net_device
*netdev
= adapter
->netdev
;
1763 struct ixgb_tx_desc
*tx_desc
, *eop_desc
;
1764 struct ixgb_buffer
*buffer_info
;
1765 unsigned int i
, eop
;
1766 bool cleaned
= false;
1768 i
= tx_ring
->next_to_clean
;
1769 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1770 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1772 while (eop_desc
->status
& IXGB_TX_DESC_STATUS_DD
) {
1774 for (cleaned
= false; !cleaned
; ) {
1775 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1776 buffer_info
= &tx_ring
->buffer_info
[i
];
1778 if (tx_desc
->popts
&
1779 (IXGB_TX_DESC_POPTS_TXSM
|
1780 IXGB_TX_DESC_POPTS_IXSM
))
1781 adapter
->hw_csum_tx_good
++;
1783 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
1785 *(u32
*)&(tx_desc
->status
) = 0;
1787 cleaned
= (i
== eop
);
1788 if (++i
== tx_ring
->count
) i
= 0;
1791 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1792 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1795 tx_ring
->next_to_clean
= i
;
1797 if (unlikely(cleaned
&& netif_carrier_ok(netdev
) &&
1798 IXGB_DESC_UNUSED(tx_ring
) >= DESC_NEEDED
)) {
1799 /* Make sure that anybody stopping the queue after this
1800 * sees the new next_to_clean. */
1803 if (netif_queue_stopped(netdev
) &&
1804 !(test_bit(__IXGB_DOWN
, &adapter
->flags
))) {
1805 netif_wake_queue(netdev
);
1806 ++adapter
->restart_queue
;
1810 if (adapter
->detect_tx_hung
) {
1811 /* detect a transmit hang in hardware, this serializes the
1812 * check with the clearing of time_stamp and movement of i */
1813 adapter
->detect_tx_hung
= false;
1814 if (tx_ring
->buffer_info
[eop
].dma
&&
1815 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+ HZ
)
1816 && !(IXGB_READ_REG(&adapter
->hw
, STATUS
) &
1817 IXGB_STATUS_TXOFF
)) {
1818 /* detected Tx unit hang */
1819 DPRINTK(DRV
, ERR
, "Detected Tx Unit Hang\n"
1822 " next_to_use <%x>\n"
1823 " next_to_clean <%x>\n"
1824 "buffer_info[next_to_clean]\n"
1825 " time_stamp <%lx>\n"
1826 " next_to_watch <%x>\n"
1828 " next_to_watch.status <%x>\n",
1829 IXGB_READ_REG(&adapter
->hw
, TDH
),
1830 IXGB_READ_REG(&adapter
->hw
, TDT
),
1831 tx_ring
->next_to_use
,
1832 tx_ring
->next_to_clean
,
1833 tx_ring
->buffer_info
[eop
].time_stamp
,
1837 netif_stop_queue(netdev
);
1845 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1846 * @adapter: board private structure
1847 * @rx_desc: receive descriptor
1848 * @sk_buff: socket buffer with received data
1852 ixgb_rx_checksum(struct ixgb_adapter
*adapter
,
1853 struct ixgb_rx_desc
*rx_desc
,
1854 struct sk_buff
*skb
)
1856 /* Ignore Checksum bit is set OR
1857 * TCP Checksum has not been calculated
1859 if ((rx_desc
->status
& IXGB_RX_DESC_STATUS_IXSM
) ||
1860 (!(rx_desc
->status
& IXGB_RX_DESC_STATUS_TCPCS
))) {
1861 skb
->ip_summed
= CHECKSUM_NONE
;
1865 /* At this point we know the hardware did the TCP checksum */
1866 /* now look at the TCP checksum error bit */
1867 if (rx_desc
->errors
& IXGB_RX_DESC_ERRORS_TCPE
) {
1868 /* let the stack verify checksum errors */
1869 skb
->ip_summed
= CHECKSUM_NONE
;
1870 adapter
->hw_csum_rx_error
++;
1872 /* TCP checksum is good */
1873 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1874 adapter
->hw_csum_rx_good
++;
1879 * ixgb_clean_rx_irq - Send received data up the network stack,
1880 * @adapter: board private structure
1884 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
, int *work_done
, int work_to_do
)
1886 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1887 struct net_device
*netdev
= adapter
->netdev
;
1888 struct pci_dev
*pdev
= adapter
->pdev
;
1889 struct ixgb_rx_desc
*rx_desc
, *next_rxd
;
1890 struct ixgb_buffer
*buffer_info
, *next_buffer
, *next2_buffer
;
1893 int cleaned_count
= 0;
1894 bool cleaned
= false;
1896 i
= rx_ring
->next_to_clean
;
1897 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
1898 buffer_info
= &rx_ring
->buffer_info
[i
];
1900 while (rx_desc
->status
& IXGB_RX_DESC_STATUS_DD
) {
1901 struct sk_buff
*skb
;
1904 if (*work_done
>= work_to_do
)
1908 status
= rx_desc
->status
;
1909 skb
= buffer_info
->skb
;
1910 buffer_info
->skb
= NULL
;
1912 prefetch(skb
->data
- NET_IP_ALIGN
);
1914 if (++i
== rx_ring
->count
) i
= 0;
1915 next_rxd
= IXGB_RX_DESC(*rx_ring
, i
);
1918 if ((j
= i
+ 1) == rx_ring
->count
) j
= 0;
1919 next2_buffer
= &rx_ring
->buffer_info
[j
];
1920 prefetch(next2_buffer
);
1922 next_buffer
= &rx_ring
->buffer_info
[i
];
1927 pci_unmap_single(pdev
,
1929 buffer_info
->length
,
1930 PCI_DMA_FROMDEVICE
);
1931 buffer_info
->dma
= 0;
1933 length
= le16_to_cpu(rx_desc
->length
);
1934 rx_desc
->length
= 0;
1936 if (unlikely(!(status
& IXGB_RX_DESC_STATUS_EOP
))) {
1938 /* All receives must fit into a single buffer */
1940 IXGB_DBG("Receive packet consumed multiple buffers "
1941 "length<%x>\n", length
);
1943 dev_kfree_skb_irq(skb
);
1947 if (unlikely(rx_desc
->errors
&
1948 (IXGB_RX_DESC_ERRORS_CE
| IXGB_RX_DESC_ERRORS_SE
|
1949 IXGB_RX_DESC_ERRORS_P
| IXGB_RX_DESC_ERRORS_RXE
))) {
1950 dev_kfree_skb_irq(skb
);
1954 /* code added for copybreak, this should improve
1955 * performance for small packets with large amounts
1956 * of reassembly being done in the stack */
1957 if (length
< copybreak
) {
1958 struct sk_buff
*new_skb
=
1959 netdev_alloc_skb(netdev
, length
+ NET_IP_ALIGN
);
1961 skb_reserve(new_skb
, NET_IP_ALIGN
);
1962 skb_copy_to_linear_data_offset(new_skb
,
1968 /* save the skb in buffer_info as good */
1969 buffer_info
->skb
= skb
;
1973 /* end copybreak code */
1976 skb_put(skb
, length
);
1978 /* Receive Checksum Offload */
1979 ixgb_rx_checksum(adapter
, rx_desc
, skb
);
1981 skb
->protocol
= eth_type_trans(skb
, netdev
);
1982 if (adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
1983 vlan_hwaccel_receive_skb(skb
, adapter
->vlgrp
,
1984 le16_to_cpu(rx_desc
->special
));
1986 netif_receive_skb(skb
);
1990 /* clean up descriptor, might be written over by hw */
1991 rx_desc
->status
= 0;
1993 /* return some buffers to hardware, one at a time is too slow */
1994 if (unlikely(cleaned_count
>= IXGB_RX_BUFFER_WRITE
)) {
1995 ixgb_alloc_rx_buffers(adapter
, cleaned_count
);
1999 /* use prefetched values */
2001 buffer_info
= next_buffer
;
2004 rx_ring
->next_to_clean
= i
;
2006 cleaned_count
= IXGB_DESC_UNUSED(rx_ring
);
2008 ixgb_alloc_rx_buffers(adapter
, cleaned_count
);
2014 * ixgb_alloc_rx_buffers - Replace used receive buffers
2015 * @adapter: address of board private structure
2019 ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
, int cleaned_count
)
2021 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
2022 struct net_device
*netdev
= adapter
->netdev
;
2023 struct pci_dev
*pdev
= adapter
->pdev
;
2024 struct ixgb_rx_desc
*rx_desc
;
2025 struct ixgb_buffer
*buffer_info
;
2026 struct sk_buff
*skb
;
2030 i
= rx_ring
->next_to_use
;
2031 buffer_info
= &rx_ring
->buffer_info
[i
];
2032 cleancount
= IXGB_DESC_UNUSED(rx_ring
);
2035 /* leave three descriptors unused */
2036 while (--cleancount
> 2 && cleaned_count
--) {
2037 /* recycle! its good for you */
2038 skb
= buffer_info
->skb
;
2044 skb
= netdev_alloc_skb(netdev
, adapter
->rx_buffer_len
2046 if (unlikely(!skb
)) {
2047 /* Better luck next round */
2048 adapter
->alloc_rx_buff_failed
++;
2052 /* Make buffer alignment 2 beyond a 16 byte boundary
2053 * this will result in a 16 byte aligned IP header after
2054 * the 14 byte MAC header is removed
2056 skb_reserve(skb
, NET_IP_ALIGN
);
2058 buffer_info
->skb
= skb
;
2059 buffer_info
->length
= adapter
->rx_buffer_len
;
2061 buffer_info
->dma
= pci_map_single(pdev
,
2063 adapter
->rx_buffer_len
,
2064 PCI_DMA_FROMDEVICE
);
2066 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
2067 rx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
2068 /* guarantee DD bit not set now before h/w gets descriptor
2069 * this is the rest of the workaround for h/w double
2071 rx_desc
->status
= 0;
2074 if (++i
== rx_ring
->count
) i
= 0;
2075 buffer_info
= &rx_ring
->buffer_info
[i
];
2078 if (likely(rx_ring
->next_to_use
!= i
)) {
2079 rx_ring
->next_to_use
= i
;
2080 if (unlikely(i
-- == 0))
2081 i
= (rx_ring
->count
- 1);
2083 /* Force memory writes to complete before letting h/w
2084 * know there are new descriptors to fetch. (Only
2085 * applicable for weak-ordered memory model archs, such
2088 IXGB_WRITE_REG(&adapter
->hw
, RDT
, i
);
2093 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2095 * @param netdev network interface device structure
2096 * @param grp indicates to enable or disable tagging/stripping
2099 ixgb_vlan_rx_register(struct net_device
*netdev
, struct vlan_group
*grp
)
2101 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2104 ixgb_irq_disable(adapter
);
2105 adapter
->vlgrp
= grp
;
2108 /* enable VLAN tag insert/strip */
2109 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2110 ctrl
|= IXGB_CTRL0_VME
;
2111 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2113 /* enable VLAN receive filtering */
2115 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2116 rctl
&= ~IXGB_RCTL_CFIEN
;
2117 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2119 /* disable VLAN tag insert/strip */
2121 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2122 ctrl
&= ~IXGB_CTRL0_VME
;
2123 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2126 /* don't enable interrupts unless we are UP */
2127 if (adapter
->netdev
->flags
& IFF_UP
)
2128 ixgb_irq_enable(adapter
);
2132 ixgb_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
2134 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2137 /* add VID to filter table */
2139 index
= (vid
>> 5) & 0x7F;
2140 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2141 vfta
|= (1 << (vid
& 0x1F));
2142 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2146 ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
2148 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2151 ixgb_irq_disable(adapter
);
2153 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
2155 /* don't enable interrupts unless we are UP */
2156 if (adapter
->netdev
->flags
& IFF_UP
)
2157 ixgb_irq_enable(adapter
);
2159 /* remove VID from filter table */
2161 index
= (vid
>> 5) & 0x7F;
2162 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2163 vfta
&= ~(1 << (vid
& 0x1F));
2164 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2168 ixgb_restore_vlan(struct ixgb_adapter
*adapter
)
2170 ixgb_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
2172 if (adapter
->vlgrp
) {
2174 for (vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
2175 if (!vlan_group_get_device(adapter
->vlgrp
, vid
))
2177 ixgb_vlan_rx_add_vid(adapter
->netdev
, vid
);
2182 #ifdef CONFIG_NET_POLL_CONTROLLER
2184 * Polling 'interrupt' - used by things like netconsole to send skbs
2185 * without having to re-enable interrupts. It's not called while
2186 * the interrupt routine is executing.
2189 static void ixgb_netpoll(struct net_device
*dev
)
2191 struct ixgb_adapter
*adapter
= netdev_priv(dev
);
2193 disable_irq(adapter
->pdev
->irq
);
2194 ixgb_intr(adapter
->pdev
->irq
, dev
);
2195 enable_irq(adapter
->pdev
->irq
);
2200 * ixgb_io_error_detected() - called when PCI error is detected
2201 * @pdev pointer to pci device with error
2202 * @state pci channel state after error
2204 * This callback is called by the PCI subsystem whenever
2205 * a PCI bus error is detected.
2207 static pci_ers_result_t
ixgb_io_error_detected(struct pci_dev
*pdev
,
2208 enum pci_channel_state state
)
2210 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2211 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2213 if (netif_running(netdev
))
2214 ixgb_down(adapter
, true);
2216 pci_disable_device(pdev
);
2218 /* Request a slot reset. */
2219 return PCI_ERS_RESULT_NEED_RESET
;
2223 * ixgb_io_slot_reset - called after the pci bus has been reset.
2224 * @pdev pointer to pci device with error
2226 * This callback is called after the PCI bus has been reset.
2227 * Basically, this tries to restart the card from scratch.
2228 * This is a shortened version of the device probe/discovery code,
2229 * it resembles the first-half of the ixgb_probe() routine.
2231 static pci_ers_result_t
ixgb_io_slot_reset(struct pci_dev
*pdev
)
2233 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2234 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2236 if (pci_enable_device(pdev
)) {
2237 DPRINTK(PROBE
, ERR
, "Cannot re-enable PCI device after reset.\n");
2238 return PCI_ERS_RESULT_DISCONNECT
;
2241 /* Perform card reset only on one instance of the card */
2242 if (0 != PCI_FUNC (pdev
->devfn
))
2243 return PCI_ERS_RESULT_RECOVERED
;
2245 pci_set_master(pdev
);
2247 netif_carrier_off(netdev
);
2248 netif_stop_queue(netdev
);
2249 ixgb_reset(adapter
);
2251 /* Make sure the EEPROM is good */
2252 if (!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
2253 DPRINTK(PROBE
, ERR
, "After reset, the EEPROM checksum is not valid.\n");
2254 return PCI_ERS_RESULT_DISCONNECT
;
2256 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
2257 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
2259 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
2260 DPRINTK(PROBE
, ERR
, "After reset, invalid MAC address.\n");
2261 return PCI_ERS_RESULT_DISCONNECT
;
2264 return PCI_ERS_RESULT_RECOVERED
;
2268 * ixgb_io_resume - called when its OK to resume normal operations
2269 * @pdev pointer to pci device with error
2271 * The error recovery driver tells us that its OK to resume
2272 * normal operation. Implementation resembles the second-half
2273 * of the ixgb_probe() routine.
2275 static void ixgb_io_resume(struct pci_dev
*pdev
)
2277 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2278 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2280 pci_set_master(pdev
);
2282 if (netif_running(netdev
)) {
2283 if (ixgb_up(adapter
)) {
2284 printk ("ixgb: can't bring device back up after reset\n");
2289 netif_device_attach(netdev
);
2290 mod_timer(&adapter
->watchdog_timer
, jiffies
);