1 /*******************************************************************************
4 Copyright(c) 1999 - 2006 Intel Corporation. All rights reserved.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2 of the License, or (at your option)
11 This program is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 You should have received a copy of the GNU General Public License along with
17 this program; if not, write to the Free Software Foundation, Inc., 59
18 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 The full GNU General Public License is included in this distribution in the
24 Linux NICS <linux.nics@intel.com>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
31 char ixgb_driver_name
[] = "ixgb";
32 static char ixgb_driver_string
[] = "Intel(R) PRO/10GbE Network Driver";
34 #ifndef CONFIG_IXGB_NAPI
37 #define DRIVERNAPI "-NAPI"
39 #define DRV_VERSION "1.0.109-k4"DRIVERNAPI
40 char ixgb_driver_version
[] = DRV_VERSION
;
41 static char ixgb_copyright
[] = "Copyright (c) 1999-2006 Intel Corporation.";
43 /* ixgb_pci_tbl - PCI Device ID Table
45 * Wildcard entries (PCI_ANY_ID) should come last
46 * Last entry must be all 0s
48 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
49 * Class, Class Mask, private data (not used) }
51 static struct pci_device_id ixgb_pci_tbl
[] = {
52 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX
,
53 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
54 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_CX4
,
55 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
56 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_SR
,
57 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
58 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_LR
,
59 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
61 /* required last entry */
65 MODULE_DEVICE_TABLE(pci
, ixgb_pci_tbl
);
67 /* Local Function Prototypes */
69 int ixgb_up(struct ixgb_adapter
*adapter
);
70 void ixgb_down(struct ixgb_adapter
*adapter
, boolean_t kill_watchdog
);
71 void ixgb_reset(struct ixgb_adapter
*adapter
);
72 int ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
);
73 int ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
);
74 void ixgb_free_tx_resources(struct ixgb_adapter
*adapter
);
75 void ixgb_free_rx_resources(struct ixgb_adapter
*adapter
);
76 void ixgb_update_stats(struct ixgb_adapter
*adapter
);
78 static int ixgb_init_module(void);
79 static void ixgb_exit_module(void);
80 static int ixgb_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
81 static void __devexit
ixgb_remove(struct pci_dev
*pdev
);
82 static int ixgb_sw_init(struct ixgb_adapter
*adapter
);
83 static int ixgb_open(struct net_device
*netdev
);
84 static int ixgb_close(struct net_device
*netdev
);
85 static void ixgb_configure_tx(struct ixgb_adapter
*adapter
);
86 static void ixgb_configure_rx(struct ixgb_adapter
*adapter
);
87 static void ixgb_setup_rctl(struct ixgb_adapter
*adapter
);
88 static void ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
);
89 static void ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
);
90 static void ixgb_set_multi(struct net_device
*netdev
);
91 static void ixgb_watchdog(unsigned long data
);
92 static int ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
);
93 static struct net_device_stats
*ixgb_get_stats(struct net_device
*netdev
);
94 static int ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
);
95 static int ixgb_set_mac(struct net_device
*netdev
, void *p
);
96 static irqreturn_t
ixgb_intr(int irq
, void *data
, struct pt_regs
*regs
);
97 static boolean_t
ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
);
99 #ifdef CONFIG_IXGB_NAPI
100 static int ixgb_clean(struct net_device
*netdev
, int *budget
);
101 static boolean_t
ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
,
102 int *work_done
, int work_to_do
);
104 static boolean_t
ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
);
106 static void ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
);
107 void ixgb_set_ethtool_ops(struct net_device
*netdev
);
108 static void ixgb_tx_timeout(struct net_device
*dev
);
109 static void ixgb_tx_timeout_task(struct net_device
*dev
);
110 static void ixgb_vlan_rx_register(struct net_device
*netdev
,
111 struct vlan_group
*grp
);
112 static void ixgb_vlan_rx_add_vid(struct net_device
*netdev
, uint16_t vid
);
113 static void ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, uint16_t vid
);
114 static void ixgb_restore_vlan(struct ixgb_adapter
*adapter
);
116 #ifdef CONFIG_NET_POLL_CONTROLLER
117 /* for netdump / net console */
118 static void ixgb_netpoll(struct net_device
*dev
);
121 /* Exported from other modules */
123 extern void ixgb_check_options(struct ixgb_adapter
*adapter
);
125 static struct pci_driver ixgb_driver
= {
126 .name
= ixgb_driver_name
,
127 .id_table
= ixgb_pci_tbl
,
129 .remove
= __devexit_p(ixgb_remove
),
132 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
133 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
134 MODULE_LICENSE("GPL");
135 MODULE_VERSION(DRV_VERSION
);
137 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
138 static int debug
= DEFAULT_DEBUG_LEVEL_SHIFT
;
139 module_param(debug
, int, 0);
140 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
142 /* some defines for controlling descriptor fetches in h/w */
143 #define RXDCTL_WTHRESH_DEFAULT 15 /* chip writes back at this many or RXT0 */
144 #define RXDCTL_PTHRESH_DEFAULT 0 /* chip considers prefech below
146 #define RXDCTL_HTHRESH_DEFAULT 0 /* chip will only prefetch if tail
147 * is pushed this many descriptors
151 * ixgb_init_module - Driver Registration Routine
153 * ixgb_init_module is the first routine called when the driver is
154 * loaded. All it does is register with the PCI subsystem.
158 ixgb_init_module(void)
160 printk(KERN_INFO
"%s - version %s\n",
161 ixgb_driver_string
, ixgb_driver_version
);
163 printk(KERN_INFO
"%s\n", ixgb_copyright
);
165 return pci_register_driver(&ixgb_driver
);
168 module_init(ixgb_init_module
);
171 * ixgb_exit_module - Driver Exit Cleanup Routine
173 * ixgb_exit_module is called just before the driver is removed
178 ixgb_exit_module(void)
180 pci_unregister_driver(&ixgb_driver
);
183 module_exit(ixgb_exit_module
);
186 * ixgb_irq_disable - Mask off interrupt generation on the NIC
187 * @adapter: board private structure
191 ixgb_irq_disable(struct ixgb_adapter
*adapter
)
193 atomic_inc(&adapter
->irq_sem
);
194 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
195 IXGB_WRITE_FLUSH(&adapter
->hw
);
196 synchronize_irq(adapter
->pdev
->irq
);
200 * ixgb_irq_enable - Enable default interrupt generation settings
201 * @adapter: board private structure
205 ixgb_irq_enable(struct ixgb_adapter
*adapter
)
207 if(atomic_dec_and_test(&adapter
->irq_sem
)) {
208 IXGB_WRITE_REG(&adapter
->hw
, IMS
,
209 IXGB_INT_RXT0
| IXGB_INT_RXDMT0
| IXGB_INT_TXDW
|
211 IXGB_WRITE_FLUSH(&adapter
->hw
);
216 ixgb_up(struct ixgb_adapter
*adapter
)
218 struct net_device
*netdev
= adapter
->netdev
;
220 int max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
221 struct ixgb_hw
*hw
= &adapter
->hw
;
223 /* hardware has been reset, we need to reload some things */
225 ixgb_rar_set(hw
, netdev
->dev_addr
, 0);
226 ixgb_set_multi(netdev
);
228 ixgb_restore_vlan(adapter
);
230 ixgb_configure_tx(adapter
);
231 ixgb_setup_rctl(adapter
);
232 ixgb_configure_rx(adapter
);
233 ixgb_alloc_rx_buffers(adapter
);
235 /* disable interrupts and get the hardware into a known state */
236 IXGB_WRITE_REG(&adapter
->hw
, IMC
, 0xffffffff);
238 #ifdef CONFIG_PCI_MSI
240 boolean_t pcix
= (IXGB_READ_REG(&adapter
->hw
, STATUS
) &
241 IXGB_STATUS_PCIX_MODE
) ? TRUE
: FALSE
;
242 adapter
->have_msi
= TRUE
;
245 adapter
->have_msi
= FALSE
;
246 else if((err
= pci_enable_msi(adapter
->pdev
))) {
248 "Unable to allocate MSI interrupt Error: %d\n", err
);
249 adapter
->have_msi
= FALSE
;
250 /* proceed to try to request regular interrupt */
255 if((err
= request_irq(adapter
->pdev
->irq
, &ixgb_intr
,
256 IRQF_SHARED
| IRQF_SAMPLE_RANDOM
,
257 netdev
->name
, netdev
))) {
259 "Unable to allocate interrupt Error: %d\n", err
);
263 if((hw
->max_frame_size
!= max_frame
) ||
264 (hw
->max_frame_size
!=
265 (IXGB_READ_REG(hw
, MFS
) >> IXGB_MFS_SHIFT
))) {
267 hw
->max_frame_size
= max_frame
;
269 IXGB_WRITE_REG(hw
, MFS
, hw
->max_frame_size
<< IXGB_MFS_SHIFT
);
271 if(hw
->max_frame_size
>
272 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
) {
273 uint32_t ctrl0
= IXGB_READ_REG(hw
, CTRL0
);
275 if(!(ctrl0
& IXGB_CTRL0_JFE
)) {
276 ctrl0
|= IXGB_CTRL0_JFE
;
277 IXGB_WRITE_REG(hw
, CTRL0
, ctrl0
);
282 mod_timer(&adapter
->watchdog_timer
, jiffies
);
284 #ifdef CONFIG_IXGB_NAPI
285 netif_poll_enable(netdev
);
287 ixgb_irq_enable(adapter
);
293 ixgb_down(struct ixgb_adapter
*adapter
, boolean_t kill_watchdog
)
295 struct net_device
*netdev
= adapter
->netdev
;
297 ixgb_irq_disable(adapter
);
298 free_irq(adapter
->pdev
->irq
, netdev
);
299 #ifdef CONFIG_PCI_MSI
300 if(adapter
->have_msi
== TRUE
)
301 pci_disable_msi(adapter
->pdev
);
305 del_timer_sync(&adapter
->watchdog_timer
);
306 #ifdef CONFIG_IXGB_NAPI
307 netif_poll_disable(netdev
);
309 adapter
->link_speed
= 0;
310 adapter
->link_duplex
= 0;
311 netif_carrier_off(netdev
);
312 netif_stop_queue(netdev
);
315 ixgb_clean_tx_ring(adapter
);
316 ixgb_clean_rx_ring(adapter
);
320 ixgb_reset(struct ixgb_adapter
*adapter
)
323 ixgb_adapter_stop(&adapter
->hw
);
324 if(!ixgb_init_hw(&adapter
->hw
))
325 DPRINTK(PROBE
, ERR
, "ixgb_init_hw failed.\n");
329 * ixgb_probe - Device Initialization Routine
330 * @pdev: PCI device information struct
331 * @ent: entry in ixgb_pci_tbl
333 * Returns 0 on success, negative on failure
335 * ixgb_probe initializes an adapter identified by a pci_dev structure.
336 * The OS initialization, configuring of the adapter private structure,
337 * and a hardware reset occur.
341 ixgb_probe(struct pci_dev
*pdev
,
342 const struct pci_device_id
*ent
)
344 struct net_device
*netdev
= NULL
;
345 struct ixgb_adapter
*adapter
;
346 static int cards_found
= 0;
347 unsigned long mmio_start
;
353 if((err
= pci_enable_device(pdev
)))
356 if(!(err
= pci_set_dma_mask(pdev
, DMA_64BIT_MASK
)) &&
357 !(err
= pci_set_consistent_dma_mask(pdev
, DMA_64BIT_MASK
))) {
360 if((err
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
)) ||
361 (err
= pci_set_consistent_dma_mask(pdev
, DMA_32BIT_MASK
))) {
363 "ixgb: No usable DMA configuration, aborting\n");
369 if((err
= pci_request_regions(pdev
, ixgb_driver_name
)))
370 goto err_request_regions
;
372 pci_set_master(pdev
);
374 netdev
= alloc_etherdev(sizeof(struct ixgb_adapter
));
377 goto err_alloc_etherdev
;
380 SET_MODULE_OWNER(netdev
);
381 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
383 pci_set_drvdata(pdev
, netdev
);
384 adapter
= netdev_priv(netdev
);
385 adapter
->netdev
= netdev
;
386 adapter
->pdev
= pdev
;
387 adapter
->hw
.back
= adapter
;
388 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_DEBUG_LEVEL_SHIFT
);
390 mmio_start
= pci_resource_start(pdev
, BAR_0
);
391 mmio_len
= pci_resource_len(pdev
, BAR_0
);
393 adapter
->hw
.hw_addr
= ioremap(mmio_start
, mmio_len
);
394 if(!adapter
->hw
.hw_addr
) {
399 for(i
= BAR_1
; i
<= BAR_5
; i
++) {
400 if(pci_resource_len(pdev
, i
) == 0)
402 if(pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
403 adapter
->hw
.io_base
= pci_resource_start(pdev
, i
);
408 netdev
->open
= &ixgb_open
;
409 netdev
->stop
= &ixgb_close
;
410 netdev
->hard_start_xmit
= &ixgb_xmit_frame
;
411 netdev
->get_stats
= &ixgb_get_stats
;
412 netdev
->set_multicast_list
= &ixgb_set_multi
;
413 netdev
->set_mac_address
= &ixgb_set_mac
;
414 netdev
->change_mtu
= &ixgb_change_mtu
;
415 ixgb_set_ethtool_ops(netdev
);
416 netdev
->tx_timeout
= &ixgb_tx_timeout
;
417 netdev
->watchdog_timeo
= 5 * HZ
;
418 #ifdef CONFIG_IXGB_NAPI
419 netdev
->poll
= &ixgb_clean
;
422 netdev
->vlan_rx_register
= ixgb_vlan_rx_register
;
423 netdev
->vlan_rx_add_vid
= ixgb_vlan_rx_add_vid
;
424 netdev
->vlan_rx_kill_vid
= ixgb_vlan_rx_kill_vid
;
425 #ifdef CONFIG_NET_POLL_CONTROLLER
426 netdev
->poll_controller
= ixgb_netpoll
;
429 strcpy(netdev
->name
, pci_name(pdev
));
430 netdev
->mem_start
= mmio_start
;
431 netdev
->mem_end
= mmio_start
+ mmio_len
;
432 netdev
->base_addr
= adapter
->hw
.io_base
;
434 adapter
->bd_number
= cards_found
;
435 adapter
->link_speed
= 0;
436 adapter
->link_duplex
= 0;
438 /* setup the private structure */
440 if((err
= ixgb_sw_init(adapter
)))
443 netdev
->features
= NETIF_F_SG
|
447 NETIF_F_HW_VLAN_FILTER
;
449 netdev
->features
|= NETIF_F_TSO
;
452 netdev
->features
|= NETIF_F_LLTX
;
456 netdev
->features
|= NETIF_F_HIGHDMA
;
458 /* make sure the EEPROM is good */
460 if(!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
461 DPRINTK(PROBE
, ERR
, "The EEPROM Checksum Is Not Valid\n");
466 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
467 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
469 if(!is_valid_ether_addr(netdev
->perm_addr
)) {
470 DPRINTK(PROBE
, ERR
, "Invalid MAC Address\n");
475 adapter
->part_num
= ixgb_get_ee_pba_number(&adapter
->hw
);
477 init_timer(&adapter
->watchdog_timer
);
478 adapter
->watchdog_timer
.function
= &ixgb_watchdog
;
479 adapter
->watchdog_timer
.data
= (unsigned long)adapter
;
481 INIT_WORK(&adapter
->tx_timeout_task
,
482 (void (*)(void *))ixgb_tx_timeout_task
, netdev
);
484 strcpy(netdev
->name
, "eth%d");
485 if((err
= register_netdev(netdev
)))
488 /* we're going to reset, so assume we have no link for now */
490 netif_carrier_off(netdev
);
491 netif_stop_queue(netdev
);
493 DPRINTK(PROBE
, INFO
, "Intel(R) PRO/10GbE Network Connection\n");
494 ixgb_check_options(adapter
);
495 /* reset the hardware with the new settings */
505 iounmap(adapter
->hw
.hw_addr
);
509 pci_release_regions(pdev
);
512 pci_disable_device(pdev
);
517 * ixgb_remove - Device Removal Routine
518 * @pdev: PCI device information struct
520 * ixgb_remove is called by the PCI subsystem to alert the driver
521 * that it should release a PCI device. The could be caused by a
522 * Hot-Plug event, or because the driver is going to be removed from
526 static void __devexit
527 ixgb_remove(struct pci_dev
*pdev
)
529 struct net_device
*netdev
= pci_get_drvdata(pdev
);
530 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
532 unregister_netdev(netdev
);
534 iounmap(adapter
->hw
.hw_addr
);
535 pci_release_regions(pdev
);
541 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
542 * @adapter: board private structure to initialize
544 * ixgb_sw_init initializes the Adapter private data structure.
545 * Fields are initialized based on PCI device information and
546 * OS network device settings (MTU size).
550 ixgb_sw_init(struct ixgb_adapter
*adapter
)
552 struct ixgb_hw
*hw
= &adapter
->hw
;
553 struct net_device
*netdev
= adapter
->netdev
;
554 struct pci_dev
*pdev
= adapter
->pdev
;
556 /* PCI config space info */
558 hw
->vendor_id
= pdev
->vendor
;
559 hw
->device_id
= pdev
->device
;
560 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
561 hw
->subsystem_id
= pdev
->subsystem_device
;
563 hw
->max_frame_size
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
564 adapter
->rx_buffer_len
= hw
->max_frame_size
;
566 if((hw
->device_id
== IXGB_DEVICE_ID_82597EX
)
567 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_CX4
)
568 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_LR
)
569 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_SR
))
570 hw
->mac_type
= ixgb_82597
;
572 /* should never have loaded on this device */
573 DPRINTK(PROBE
, ERR
, "unsupported device id\n");
576 /* enable flow control to be programmed */
579 atomic_set(&adapter
->irq_sem
, 1);
580 spin_lock_init(&adapter
->tx_lock
);
586 * ixgb_open - Called when a network interface is made active
587 * @netdev: network interface device structure
589 * Returns 0 on success, negative value on failure
591 * The open entry point is called when a network interface is made
592 * active by the system (IFF_UP). At this point all resources needed
593 * for transmit and receive operations are allocated, the interrupt
594 * handler is registered with the OS, the watchdog timer is started,
595 * and the stack is notified that the interface is ready.
599 ixgb_open(struct net_device
*netdev
)
601 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
604 /* allocate transmit descriptors */
606 if((err
= ixgb_setup_tx_resources(adapter
)))
609 /* allocate receive descriptors */
611 if((err
= ixgb_setup_rx_resources(adapter
)))
614 if((err
= ixgb_up(adapter
)))
620 ixgb_free_rx_resources(adapter
);
622 ixgb_free_tx_resources(adapter
);
630 * ixgb_close - Disables a network interface
631 * @netdev: network interface device structure
633 * Returns 0, this is not allowed to fail
635 * The close entry point is called when an interface is de-activated
636 * by the OS. The hardware is still under the drivers control, but
637 * needs to be disabled. A global MAC reset is issued to stop the
638 * hardware, and all transmit and receive resources are freed.
642 ixgb_close(struct net_device
*netdev
)
644 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
646 ixgb_down(adapter
, TRUE
);
648 ixgb_free_tx_resources(adapter
);
649 ixgb_free_rx_resources(adapter
);
655 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
656 * @adapter: board private structure
658 * Return 0 on success, negative on failure
662 ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
)
664 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
665 struct pci_dev
*pdev
= adapter
->pdev
;
668 size
= sizeof(struct ixgb_buffer
) * txdr
->count
;
669 txdr
->buffer_info
= vmalloc(size
);
670 if(!txdr
->buffer_info
) {
672 "Unable to allocate transmit descriptor ring memory\n");
675 memset(txdr
->buffer_info
, 0, size
);
677 /* round up to nearest 4K */
679 txdr
->size
= txdr
->count
* sizeof(struct ixgb_tx_desc
);
680 IXGB_ROUNDUP(txdr
->size
, 4096);
682 txdr
->desc
= pci_alloc_consistent(pdev
, txdr
->size
, &txdr
->dma
);
684 vfree(txdr
->buffer_info
);
686 "Unable to allocate transmit descriptor memory\n");
689 memset(txdr
->desc
, 0, txdr
->size
);
691 txdr
->next_to_use
= 0;
692 txdr
->next_to_clean
= 0;
698 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
699 * @adapter: board private structure
701 * Configure the Tx unit of the MAC after a reset.
705 ixgb_configure_tx(struct ixgb_adapter
*adapter
)
707 uint64_t tdba
= adapter
->tx_ring
.dma
;
708 uint32_t tdlen
= adapter
->tx_ring
.count
* sizeof(struct ixgb_tx_desc
);
710 struct ixgb_hw
*hw
= &adapter
->hw
;
712 /* Setup the Base and Length of the Tx Descriptor Ring
713 * tx_ring.dma can be either a 32 or 64 bit value
716 IXGB_WRITE_REG(hw
, TDBAL
, (tdba
& 0x00000000ffffffffULL
));
717 IXGB_WRITE_REG(hw
, TDBAH
, (tdba
>> 32));
719 IXGB_WRITE_REG(hw
, TDLEN
, tdlen
);
721 /* Setup the HW Tx Head and Tail descriptor pointers */
723 IXGB_WRITE_REG(hw
, TDH
, 0);
724 IXGB_WRITE_REG(hw
, TDT
, 0);
726 /* don't set up txdctl, it induces performance problems if configured
728 /* Set the Tx Interrupt Delay register */
730 IXGB_WRITE_REG(hw
, TIDV
, adapter
->tx_int_delay
);
732 /* Program the Transmit Control Register */
734 tctl
= IXGB_TCTL_TCE
| IXGB_TCTL_TXEN
| IXGB_TCTL_TPDE
;
735 IXGB_WRITE_REG(hw
, TCTL
, tctl
);
737 /* Setup Transmit Descriptor Settings for this adapter */
738 adapter
->tx_cmd_type
=
740 | (adapter
->tx_int_delay_enable
? IXGB_TX_DESC_CMD_IDE
: 0);
744 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
745 * @adapter: board private structure
747 * Returns 0 on success, negative on failure
751 ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
)
753 struct ixgb_desc_ring
*rxdr
= &adapter
->rx_ring
;
754 struct pci_dev
*pdev
= adapter
->pdev
;
757 size
= sizeof(struct ixgb_buffer
) * rxdr
->count
;
758 rxdr
->buffer_info
= vmalloc(size
);
759 if(!rxdr
->buffer_info
) {
761 "Unable to allocate receive descriptor ring\n");
764 memset(rxdr
->buffer_info
, 0, size
);
766 /* Round up to nearest 4K */
768 rxdr
->size
= rxdr
->count
* sizeof(struct ixgb_rx_desc
);
769 IXGB_ROUNDUP(rxdr
->size
, 4096);
771 rxdr
->desc
= pci_alloc_consistent(pdev
, rxdr
->size
, &rxdr
->dma
);
774 vfree(rxdr
->buffer_info
);
776 "Unable to allocate receive descriptors\n");
779 memset(rxdr
->desc
, 0, rxdr
->size
);
781 rxdr
->next_to_clean
= 0;
782 rxdr
->next_to_use
= 0;
788 * ixgb_setup_rctl - configure the receive control register
789 * @adapter: Board private structure
793 ixgb_setup_rctl(struct ixgb_adapter
*adapter
)
797 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
799 rctl
&= ~(3 << IXGB_RCTL_MO_SHIFT
);
802 IXGB_RCTL_BAM
| IXGB_RCTL_RDMTS_1_2
|
803 IXGB_RCTL_RXEN
| IXGB_RCTL_CFF
|
804 (adapter
->hw
.mc_filter_type
<< IXGB_RCTL_MO_SHIFT
);
806 rctl
|= IXGB_RCTL_SECRC
;
808 if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_2048
)
809 rctl
|= IXGB_RCTL_BSIZE_2048
;
810 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_4096
)
811 rctl
|= IXGB_RCTL_BSIZE_4096
;
812 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_8192
)
813 rctl
|= IXGB_RCTL_BSIZE_8192
;
814 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_16384
)
815 rctl
|= IXGB_RCTL_BSIZE_16384
;
817 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
821 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
822 * @adapter: board private structure
824 * Configure the Rx unit of the MAC after a reset.
828 ixgb_configure_rx(struct ixgb_adapter
*adapter
)
830 uint64_t rdba
= adapter
->rx_ring
.dma
;
831 uint32_t rdlen
= adapter
->rx_ring
.count
* sizeof(struct ixgb_rx_desc
);
832 struct ixgb_hw
*hw
= &adapter
->hw
;
837 /* make sure receives are disabled while setting up the descriptors */
839 rctl
= IXGB_READ_REG(hw
, RCTL
);
840 IXGB_WRITE_REG(hw
, RCTL
, rctl
& ~IXGB_RCTL_RXEN
);
842 /* set the Receive Delay Timer Register */
844 IXGB_WRITE_REG(hw
, RDTR
, adapter
->rx_int_delay
);
846 /* Setup the Base and Length of the Rx Descriptor Ring */
848 IXGB_WRITE_REG(hw
, RDBAL
, (rdba
& 0x00000000ffffffffULL
));
849 IXGB_WRITE_REG(hw
, RDBAH
, (rdba
>> 32));
851 IXGB_WRITE_REG(hw
, RDLEN
, rdlen
);
853 /* Setup the HW Rx Head and Tail Descriptor Pointers */
854 IXGB_WRITE_REG(hw
, RDH
, 0);
855 IXGB_WRITE_REG(hw
, RDT
, 0);
857 /* set up pre-fetching of receive buffers so we get some before we
858 * run out (default hardware behavior is to run out before fetching
859 * more). This sets up to fetch if HTHRESH rx descriptors are avail
860 * and the descriptors in hw cache are below PTHRESH. This avoids
861 * the hardware behavior of fetching <=512 descriptors in a single
862 * burst that pre-empts all other activity, usually causing fifo
864 /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
865 rxdctl
= RXDCTL_WTHRESH_DEFAULT
<< IXGB_RXDCTL_WTHRESH_SHIFT
|
866 RXDCTL_HTHRESH_DEFAULT
<< IXGB_RXDCTL_HTHRESH_SHIFT
|
867 RXDCTL_PTHRESH_DEFAULT
<< IXGB_RXDCTL_PTHRESH_SHIFT
;
868 IXGB_WRITE_REG(hw
, RXDCTL
, rxdctl
);
870 /* Enable Receive Checksum Offload for TCP and UDP */
871 if(adapter
->rx_csum
== TRUE
) {
872 rxcsum
= IXGB_READ_REG(hw
, RXCSUM
);
873 rxcsum
|= IXGB_RXCSUM_TUOFL
;
874 IXGB_WRITE_REG(hw
, RXCSUM
, rxcsum
);
877 /* Enable Receives */
879 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
883 * ixgb_free_tx_resources - Free Tx Resources
884 * @adapter: board private structure
886 * Free all transmit software resources
890 ixgb_free_tx_resources(struct ixgb_adapter
*adapter
)
892 struct pci_dev
*pdev
= adapter
->pdev
;
894 ixgb_clean_tx_ring(adapter
);
896 vfree(adapter
->tx_ring
.buffer_info
);
897 adapter
->tx_ring
.buffer_info
= NULL
;
899 pci_free_consistent(pdev
, adapter
->tx_ring
.size
,
900 adapter
->tx_ring
.desc
, adapter
->tx_ring
.dma
);
902 adapter
->tx_ring
.desc
= NULL
;
906 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter
*adapter
,
907 struct ixgb_buffer
*buffer_info
)
909 struct pci_dev
*pdev
= adapter
->pdev
;
911 if (buffer_info
->dma
)
912 pci_unmap_page(pdev
, buffer_info
->dma
, buffer_info
->length
,
915 if (buffer_info
->skb
)
916 dev_kfree_skb_any(buffer_info
->skb
);
918 buffer_info
->skb
= NULL
;
919 buffer_info
->dma
= 0;
920 buffer_info
->time_stamp
= 0;
921 /* these fields must always be initialized in tx
922 * buffer_info->length = 0;
923 * buffer_info->next_to_watch = 0; */
927 * ixgb_clean_tx_ring - Free Tx Buffers
928 * @adapter: board private structure
932 ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
)
934 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
935 struct ixgb_buffer
*buffer_info
;
939 /* Free all the Tx ring sk_buffs */
941 for(i
= 0; i
< tx_ring
->count
; i
++) {
942 buffer_info
= &tx_ring
->buffer_info
[i
];
943 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
946 size
= sizeof(struct ixgb_buffer
) * tx_ring
->count
;
947 memset(tx_ring
->buffer_info
, 0, size
);
949 /* Zero out the descriptor ring */
951 memset(tx_ring
->desc
, 0, tx_ring
->size
);
953 tx_ring
->next_to_use
= 0;
954 tx_ring
->next_to_clean
= 0;
956 IXGB_WRITE_REG(&adapter
->hw
, TDH
, 0);
957 IXGB_WRITE_REG(&adapter
->hw
, TDT
, 0);
961 * ixgb_free_rx_resources - Free Rx Resources
962 * @adapter: board private structure
964 * Free all receive software resources
968 ixgb_free_rx_resources(struct ixgb_adapter
*adapter
)
970 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
971 struct pci_dev
*pdev
= adapter
->pdev
;
973 ixgb_clean_rx_ring(adapter
);
975 vfree(rx_ring
->buffer_info
);
976 rx_ring
->buffer_info
= NULL
;
978 pci_free_consistent(pdev
, rx_ring
->size
, rx_ring
->desc
, rx_ring
->dma
);
980 rx_ring
->desc
= NULL
;
984 * ixgb_clean_rx_ring - Free Rx Buffers
985 * @adapter: board private structure
989 ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
)
991 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
992 struct ixgb_buffer
*buffer_info
;
993 struct pci_dev
*pdev
= adapter
->pdev
;
997 /* Free all the Rx ring sk_buffs */
999 for(i
= 0; i
< rx_ring
->count
; i
++) {
1000 buffer_info
= &rx_ring
->buffer_info
[i
];
1001 if(buffer_info
->skb
) {
1003 pci_unmap_single(pdev
,
1005 buffer_info
->length
,
1006 PCI_DMA_FROMDEVICE
);
1008 dev_kfree_skb(buffer_info
->skb
);
1010 buffer_info
->skb
= NULL
;
1014 size
= sizeof(struct ixgb_buffer
) * rx_ring
->count
;
1015 memset(rx_ring
->buffer_info
, 0, size
);
1017 /* Zero out the descriptor ring */
1019 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1021 rx_ring
->next_to_clean
= 0;
1022 rx_ring
->next_to_use
= 0;
1024 IXGB_WRITE_REG(&adapter
->hw
, RDH
, 0);
1025 IXGB_WRITE_REG(&adapter
->hw
, RDT
, 0);
1029 * ixgb_set_mac - Change the Ethernet Address of the NIC
1030 * @netdev: network interface device structure
1031 * @p: pointer to an address structure
1033 * Returns 0 on success, negative on failure
1037 ixgb_set_mac(struct net_device
*netdev
, void *p
)
1039 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1040 struct sockaddr
*addr
= p
;
1042 if(!is_valid_ether_addr(addr
->sa_data
))
1043 return -EADDRNOTAVAIL
;
1045 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1047 ixgb_rar_set(&adapter
->hw
, addr
->sa_data
, 0);
1053 * ixgb_set_multi - Multicast and Promiscuous mode set
1054 * @netdev: network interface device structure
1056 * The set_multi entry point is called whenever the multicast address
1057 * list or the network interface flags are updated. This routine is
1058 * responsible for configuring the hardware for proper multicast,
1059 * promiscuous mode, and all-multi behavior.
1063 ixgb_set_multi(struct net_device
*netdev
)
1065 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1066 struct ixgb_hw
*hw
= &adapter
->hw
;
1067 struct dev_mc_list
*mc_ptr
;
1071 /* Check for Promiscuous and All Multicast modes */
1073 rctl
= IXGB_READ_REG(hw
, RCTL
);
1075 if(netdev
->flags
& IFF_PROMISC
) {
1076 rctl
|= (IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1077 } else if(netdev
->flags
& IFF_ALLMULTI
) {
1078 rctl
|= IXGB_RCTL_MPE
;
1079 rctl
&= ~IXGB_RCTL_UPE
;
1081 rctl
&= ~(IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1084 if(netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
) {
1085 rctl
|= IXGB_RCTL_MPE
;
1086 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1088 uint8_t mta
[netdev
->mc_count
* IXGB_ETH_LENGTH_OF_ADDRESS
];
1090 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1092 for(i
= 0, mc_ptr
= netdev
->mc_list
; mc_ptr
;
1093 i
++, mc_ptr
= mc_ptr
->next
)
1094 memcpy(&mta
[i
* IXGB_ETH_LENGTH_OF_ADDRESS
],
1095 mc_ptr
->dmi_addr
, IXGB_ETH_LENGTH_OF_ADDRESS
);
1097 ixgb_mc_addr_list_update(hw
, mta
, netdev
->mc_count
, 0);
1102 * ixgb_watchdog - Timer Call-back
1103 * @data: pointer to netdev cast into an unsigned long
1107 ixgb_watchdog(unsigned long data
)
1109 struct ixgb_adapter
*adapter
= (struct ixgb_adapter
*)data
;
1110 struct net_device
*netdev
= adapter
->netdev
;
1111 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
1113 ixgb_check_for_link(&adapter
->hw
);
1115 if (ixgb_check_for_bad_link(&adapter
->hw
)) {
1116 /* force the reset path */
1117 netif_stop_queue(netdev
);
1120 if(adapter
->hw
.link_up
) {
1121 if(!netif_carrier_ok(netdev
)) {
1123 "NIC Link is Up 10000 Mbps Full Duplex\n");
1124 adapter
->link_speed
= 10000;
1125 adapter
->link_duplex
= FULL_DUPLEX
;
1126 netif_carrier_on(netdev
);
1127 netif_wake_queue(netdev
);
1130 if(netif_carrier_ok(netdev
)) {
1131 adapter
->link_speed
= 0;
1132 adapter
->link_duplex
= 0;
1133 DPRINTK(LINK
, INFO
, "NIC Link is Down\n");
1134 netif_carrier_off(netdev
);
1135 netif_stop_queue(netdev
);
1140 ixgb_update_stats(adapter
);
1142 if(!netif_carrier_ok(netdev
)) {
1143 if(IXGB_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
1144 /* We've lost link, so the controller stops DMA,
1145 * but we've got queued Tx work that's never going
1146 * to get done, so reset controller to flush Tx.
1147 * (Do the reset outside of interrupt context). */
1148 schedule_work(&adapter
->tx_timeout_task
);
1152 /* Force detection of hung controller every watchdog period */
1153 adapter
->detect_tx_hung
= TRUE
;
1155 /* generate an interrupt to force clean up of any stragglers */
1156 IXGB_WRITE_REG(&adapter
->hw
, ICS
, IXGB_INT_TXDW
);
1158 /* Reset the timer */
1159 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 2 * HZ
);
1162 #define IXGB_TX_FLAGS_CSUM 0x00000001
1163 #define IXGB_TX_FLAGS_VLAN 0x00000002
1164 #define IXGB_TX_FLAGS_TSO 0x00000004
1167 ixgb_tso(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1170 struct ixgb_context_desc
*context_desc
;
1172 uint8_t ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
1173 uint16_t ipcse
, tucse
, mss
;
1176 if (likely(skb_is_gso(skb
))) {
1177 if (skb_header_cloned(skb
)) {
1178 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
1183 hdr_len
= ((skb
->h
.raw
- skb
->data
) + (skb
->h
.th
->doff
<< 2));
1184 mss
= skb_shinfo(skb
)->gso_size
;
1185 skb
->nh
.iph
->tot_len
= 0;
1186 skb
->nh
.iph
->check
= 0;
1187 skb
->h
.th
->check
= ~csum_tcpudp_magic(skb
->nh
.iph
->saddr
,
1190 ipcss
= skb
->nh
.raw
- skb
->data
;
1191 ipcso
= (void *)&(skb
->nh
.iph
->check
) - (void *)skb
->data
;
1192 ipcse
= skb
->h
.raw
- skb
->data
- 1;
1193 tucss
= skb
->h
.raw
- skb
->data
;
1194 tucso
= (void *)&(skb
->h
.th
->check
) - (void *)skb
->data
;
1197 i
= adapter
->tx_ring
.next_to_use
;
1198 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1200 context_desc
->ipcss
= ipcss
;
1201 context_desc
->ipcso
= ipcso
;
1202 context_desc
->ipcse
= cpu_to_le16(ipcse
);
1203 context_desc
->tucss
= tucss
;
1204 context_desc
->tucso
= tucso
;
1205 context_desc
->tucse
= cpu_to_le16(tucse
);
1206 context_desc
->mss
= cpu_to_le16(mss
);
1207 context_desc
->hdr_len
= hdr_len
;
1208 context_desc
->status
= 0;
1209 context_desc
->cmd_type_len
= cpu_to_le32(
1210 IXGB_CONTEXT_DESC_TYPE
1211 | IXGB_CONTEXT_DESC_CMD_TSE
1212 | IXGB_CONTEXT_DESC_CMD_IP
1213 | IXGB_CONTEXT_DESC_CMD_TCP
1214 | IXGB_CONTEXT_DESC_CMD_IDE
1215 | (skb
->len
- (hdr_len
)));
1218 if(++i
== adapter
->tx_ring
.count
) i
= 0;
1219 adapter
->tx_ring
.next_to_use
= i
;
1229 ixgb_tx_csum(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1231 struct ixgb_context_desc
*context_desc
;
1235 if(likely(skb
->ip_summed
== CHECKSUM_HW
)) {
1236 css
= skb
->h
.raw
- skb
->data
;
1237 cso
= (skb
->h
.raw
+ skb
->csum
) - skb
->data
;
1239 i
= adapter
->tx_ring
.next_to_use
;
1240 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1242 context_desc
->tucss
= css
;
1243 context_desc
->tucso
= cso
;
1244 context_desc
->tucse
= 0;
1245 /* zero out any previously existing data in one instruction */
1246 *(uint32_t *)&(context_desc
->ipcss
) = 0;
1247 context_desc
->status
= 0;
1248 context_desc
->hdr_len
= 0;
1249 context_desc
->mss
= 0;
1250 context_desc
->cmd_type_len
=
1251 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1252 | IXGB_TX_DESC_CMD_IDE
);
1254 if(++i
== adapter
->tx_ring
.count
) i
= 0;
1255 adapter
->tx_ring
.next_to_use
= i
;
1263 #define IXGB_MAX_TXD_PWR 14
1264 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1267 ixgb_tx_map(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
,
1270 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1271 struct ixgb_buffer
*buffer_info
;
1273 unsigned int offset
= 0, size
, count
= 0, i
;
1275 unsigned int nr_frags
= skb_shinfo(skb
)->nr_frags
;
1278 len
-= skb
->data_len
;
1280 i
= tx_ring
->next_to_use
;
1283 buffer_info
= &tx_ring
->buffer_info
[i
];
1284 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1285 buffer_info
->length
= size
;
1287 pci_map_single(adapter
->pdev
,
1291 buffer_info
->time_stamp
= jiffies
;
1292 buffer_info
->next_to_watch
= 0;
1297 if(++i
== tx_ring
->count
) i
= 0;
1300 for(f
= 0; f
< nr_frags
; f
++) {
1301 struct skb_frag_struct
*frag
;
1303 frag
= &skb_shinfo(skb
)->frags
[f
];
1308 buffer_info
= &tx_ring
->buffer_info
[i
];
1309 size
= min(len
, IXGB_MAX_DATA_PER_TXD
);
1310 buffer_info
->length
= size
;
1312 pci_map_page(adapter
->pdev
,
1314 frag
->page_offset
+ offset
,
1317 buffer_info
->time_stamp
= jiffies
;
1318 buffer_info
->next_to_watch
= 0;
1323 if(++i
== tx_ring
->count
) i
= 0;
1326 i
= (i
== 0) ? tx_ring
->count
- 1 : i
- 1;
1327 tx_ring
->buffer_info
[i
].skb
= skb
;
1328 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
1334 ixgb_tx_queue(struct ixgb_adapter
*adapter
, int count
, int vlan_id
,int tx_flags
)
1336 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1337 struct ixgb_tx_desc
*tx_desc
= NULL
;
1338 struct ixgb_buffer
*buffer_info
;
1339 uint32_t cmd_type_len
= adapter
->tx_cmd_type
;
1344 if(tx_flags
& IXGB_TX_FLAGS_TSO
) {
1345 cmd_type_len
|= IXGB_TX_DESC_CMD_TSE
;
1346 popts
|= (IXGB_TX_DESC_POPTS_IXSM
| IXGB_TX_DESC_POPTS_TXSM
);
1349 if(tx_flags
& IXGB_TX_FLAGS_CSUM
)
1350 popts
|= IXGB_TX_DESC_POPTS_TXSM
;
1352 if(tx_flags
& IXGB_TX_FLAGS_VLAN
) {
1353 cmd_type_len
|= IXGB_TX_DESC_CMD_VLE
;
1356 i
= tx_ring
->next_to_use
;
1359 buffer_info
= &tx_ring
->buffer_info
[i
];
1360 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1361 tx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
1362 tx_desc
->cmd_type_len
=
1363 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
1364 tx_desc
->status
= status
;
1365 tx_desc
->popts
= popts
;
1366 tx_desc
->vlan
= cpu_to_le16(vlan_id
);
1368 if(++i
== tx_ring
->count
) i
= 0;
1371 tx_desc
->cmd_type_len
|= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1372 | IXGB_TX_DESC_CMD_RS
);
1374 /* Force memory writes to complete before letting h/w
1375 * know there are new descriptors to fetch. (Only
1376 * applicable for weak-ordered memory model archs,
1377 * such as IA-64). */
1380 tx_ring
->next_to_use
= i
;
1381 IXGB_WRITE_REG(&adapter
->hw
, TDT
, i
);
1384 /* Tx Descriptors needed, worst case */
1385 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1386 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1387 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) + \
1388 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1
1391 ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
1393 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1395 unsigned int tx_flags
= 0;
1396 unsigned long flags
;
1401 dev_kfree_skb_any(skb
);
1406 local_irq_save(flags
);
1407 if (!spin_trylock(&adapter
->tx_lock
)) {
1408 /* Collision - tell upper layer to requeue */
1409 local_irq_restore(flags
);
1410 return NETDEV_TX_LOCKED
;
1413 spin_lock_irqsave(&adapter
->tx_lock
, flags
);
1416 if(unlikely(IXGB_DESC_UNUSED(&adapter
->tx_ring
) < DESC_NEEDED
)) {
1417 netif_stop_queue(netdev
);
1418 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1419 return NETDEV_TX_BUSY
;
1422 #ifndef NETIF_F_LLTX
1423 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1426 if(adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
1427 tx_flags
|= IXGB_TX_FLAGS_VLAN
;
1428 vlan_id
= vlan_tx_tag_get(skb
);
1431 first
= adapter
->tx_ring
.next_to_use
;
1433 tso
= ixgb_tso(adapter
, skb
);
1435 dev_kfree_skb_any(skb
);
1437 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1439 return NETDEV_TX_OK
;
1443 tx_flags
|= IXGB_TX_FLAGS_TSO
;
1444 else if(ixgb_tx_csum(adapter
, skb
))
1445 tx_flags
|= IXGB_TX_FLAGS_CSUM
;
1447 ixgb_tx_queue(adapter
, ixgb_tx_map(adapter
, skb
, first
), vlan_id
,
1450 netdev
->trans_start
= jiffies
;
1453 /* Make sure there is space in the ring for the next send. */
1454 if(unlikely(IXGB_DESC_UNUSED(&adapter
->tx_ring
) < DESC_NEEDED
))
1455 netif_stop_queue(netdev
);
1457 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1460 return NETDEV_TX_OK
;
1464 * ixgb_tx_timeout - Respond to a Tx Hang
1465 * @netdev: network interface device structure
1469 ixgb_tx_timeout(struct net_device
*netdev
)
1471 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1473 /* Do the reset outside of interrupt context */
1474 schedule_work(&adapter
->tx_timeout_task
);
1478 ixgb_tx_timeout_task(struct net_device
*netdev
)
1480 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1482 adapter
->tx_timeout_count
++;
1483 ixgb_down(adapter
, TRUE
);
1488 * ixgb_get_stats - Get System Network Statistics
1489 * @netdev: network interface device structure
1491 * Returns the address of the device statistics structure.
1492 * The statistics are actually updated from the timer callback.
1495 static struct net_device_stats
*
1496 ixgb_get_stats(struct net_device
*netdev
)
1498 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1500 return &adapter
->net_stats
;
1504 * ixgb_change_mtu - Change the Maximum Transfer Unit
1505 * @netdev: network interface device structure
1506 * @new_mtu: new value for maximum frame size
1508 * Returns 0 on success, negative on failure
1512 ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
)
1514 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1515 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1516 int old_max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1519 if((max_frame
< IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
)
1520 || (max_frame
> IXGB_MAX_JUMBO_FRAME_SIZE
+ ENET_FCS_LENGTH
)) {
1521 DPRINTK(PROBE
, ERR
, "Invalid MTU setting %d\n", new_mtu
);
1525 adapter
->rx_buffer_len
= max_frame
;
1527 netdev
->mtu
= new_mtu
;
1529 if ((old_max_frame
!= max_frame
) && netif_running(netdev
)) {
1530 ixgb_down(adapter
, TRUE
);
1538 * ixgb_update_stats - Update the board statistics counters.
1539 * @adapter: board private structure
1543 ixgb_update_stats(struct ixgb_adapter
*adapter
)
1545 struct net_device
*netdev
= adapter
->netdev
;
1547 if((netdev
->flags
& IFF_PROMISC
) || (netdev
->flags
& IFF_ALLMULTI
) ||
1548 (netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
)) {
1549 u64 multi
= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1550 u32 bcast_l
= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1551 u32 bcast_h
= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1552 u64 bcast
= ((u64
)bcast_h
<< 32) | bcast_l
;
1554 multi
|= ((u64
)IXGB_READ_REG(&adapter
->hw
, MPRCH
) << 32);
1555 /* fix up multicast stats by removing broadcasts */
1559 adapter
->stats
.mprcl
+= (multi
& 0xFFFFFFFF);
1560 adapter
->stats
.mprch
+= (multi
>> 32);
1561 adapter
->stats
.bprcl
+= bcast_l
;
1562 adapter
->stats
.bprch
+= bcast_h
;
1564 adapter
->stats
.mprcl
+= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1565 adapter
->stats
.mprch
+= IXGB_READ_REG(&adapter
->hw
, MPRCH
);
1566 adapter
->stats
.bprcl
+= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1567 adapter
->stats
.bprch
+= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1569 adapter
->stats
.tprl
+= IXGB_READ_REG(&adapter
->hw
, TPRL
);
1570 adapter
->stats
.tprh
+= IXGB_READ_REG(&adapter
->hw
, TPRH
);
1571 adapter
->stats
.gprcl
+= IXGB_READ_REG(&adapter
->hw
, GPRCL
);
1572 adapter
->stats
.gprch
+= IXGB_READ_REG(&adapter
->hw
, GPRCH
);
1573 adapter
->stats
.uprcl
+= IXGB_READ_REG(&adapter
->hw
, UPRCL
);
1574 adapter
->stats
.uprch
+= IXGB_READ_REG(&adapter
->hw
, UPRCH
);
1575 adapter
->stats
.vprcl
+= IXGB_READ_REG(&adapter
->hw
, VPRCL
);
1576 adapter
->stats
.vprch
+= IXGB_READ_REG(&adapter
->hw
, VPRCH
);
1577 adapter
->stats
.jprcl
+= IXGB_READ_REG(&adapter
->hw
, JPRCL
);
1578 adapter
->stats
.jprch
+= IXGB_READ_REG(&adapter
->hw
, JPRCH
);
1579 adapter
->stats
.gorcl
+= IXGB_READ_REG(&adapter
->hw
, GORCL
);
1580 adapter
->stats
.gorch
+= IXGB_READ_REG(&adapter
->hw
, GORCH
);
1581 adapter
->stats
.torl
+= IXGB_READ_REG(&adapter
->hw
, TORL
);
1582 adapter
->stats
.torh
+= IXGB_READ_REG(&adapter
->hw
, TORH
);
1583 adapter
->stats
.rnbc
+= IXGB_READ_REG(&adapter
->hw
, RNBC
);
1584 adapter
->stats
.ruc
+= IXGB_READ_REG(&adapter
->hw
, RUC
);
1585 adapter
->stats
.roc
+= IXGB_READ_REG(&adapter
->hw
, ROC
);
1586 adapter
->stats
.rlec
+= IXGB_READ_REG(&adapter
->hw
, RLEC
);
1587 adapter
->stats
.crcerrs
+= IXGB_READ_REG(&adapter
->hw
, CRCERRS
);
1588 adapter
->stats
.icbc
+= IXGB_READ_REG(&adapter
->hw
, ICBC
);
1589 adapter
->stats
.ecbc
+= IXGB_READ_REG(&adapter
->hw
, ECBC
);
1590 adapter
->stats
.mpc
+= IXGB_READ_REG(&adapter
->hw
, MPC
);
1591 adapter
->stats
.tptl
+= IXGB_READ_REG(&adapter
->hw
, TPTL
);
1592 adapter
->stats
.tpth
+= IXGB_READ_REG(&adapter
->hw
, TPTH
);
1593 adapter
->stats
.gptcl
+= IXGB_READ_REG(&adapter
->hw
, GPTCL
);
1594 adapter
->stats
.gptch
+= IXGB_READ_REG(&adapter
->hw
, GPTCH
);
1595 adapter
->stats
.bptcl
+= IXGB_READ_REG(&adapter
->hw
, BPTCL
);
1596 adapter
->stats
.bptch
+= IXGB_READ_REG(&adapter
->hw
, BPTCH
);
1597 adapter
->stats
.mptcl
+= IXGB_READ_REG(&adapter
->hw
, MPTCL
);
1598 adapter
->stats
.mptch
+= IXGB_READ_REG(&adapter
->hw
, MPTCH
);
1599 adapter
->stats
.uptcl
+= IXGB_READ_REG(&adapter
->hw
, UPTCL
);
1600 adapter
->stats
.uptch
+= IXGB_READ_REG(&adapter
->hw
, UPTCH
);
1601 adapter
->stats
.vptcl
+= IXGB_READ_REG(&adapter
->hw
, VPTCL
);
1602 adapter
->stats
.vptch
+= IXGB_READ_REG(&adapter
->hw
, VPTCH
);
1603 adapter
->stats
.jptcl
+= IXGB_READ_REG(&adapter
->hw
, JPTCL
);
1604 adapter
->stats
.jptch
+= IXGB_READ_REG(&adapter
->hw
, JPTCH
);
1605 adapter
->stats
.gotcl
+= IXGB_READ_REG(&adapter
->hw
, GOTCL
);
1606 adapter
->stats
.gotch
+= IXGB_READ_REG(&adapter
->hw
, GOTCH
);
1607 adapter
->stats
.totl
+= IXGB_READ_REG(&adapter
->hw
, TOTL
);
1608 adapter
->stats
.toth
+= IXGB_READ_REG(&adapter
->hw
, TOTH
);
1609 adapter
->stats
.dc
+= IXGB_READ_REG(&adapter
->hw
, DC
);
1610 adapter
->stats
.plt64c
+= IXGB_READ_REG(&adapter
->hw
, PLT64C
);
1611 adapter
->stats
.tsctc
+= IXGB_READ_REG(&adapter
->hw
, TSCTC
);
1612 adapter
->stats
.tsctfc
+= IXGB_READ_REG(&adapter
->hw
, TSCTFC
);
1613 adapter
->stats
.ibic
+= IXGB_READ_REG(&adapter
->hw
, IBIC
);
1614 adapter
->stats
.rfc
+= IXGB_READ_REG(&adapter
->hw
, RFC
);
1615 adapter
->stats
.lfc
+= IXGB_READ_REG(&adapter
->hw
, LFC
);
1616 adapter
->stats
.pfrc
+= IXGB_READ_REG(&adapter
->hw
, PFRC
);
1617 adapter
->stats
.pftc
+= IXGB_READ_REG(&adapter
->hw
, PFTC
);
1618 adapter
->stats
.mcfrc
+= IXGB_READ_REG(&adapter
->hw
, MCFRC
);
1619 adapter
->stats
.mcftc
+= IXGB_READ_REG(&adapter
->hw
, MCFTC
);
1620 adapter
->stats
.xonrxc
+= IXGB_READ_REG(&adapter
->hw
, XONRXC
);
1621 adapter
->stats
.xontxc
+= IXGB_READ_REG(&adapter
->hw
, XONTXC
);
1622 adapter
->stats
.xoffrxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFRXC
);
1623 adapter
->stats
.xofftxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFTXC
);
1624 adapter
->stats
.rjc
+= IXGB_READ_REG(&adapter
->hw
, RJC
);
1626 /* Fill out the OS statistics structure */
1628 adapter
->net_stats
.rx_packets
= adapter
->stats
.gprcl
;
1629 adapter
->net_stats
.tx_packets
= adapter
->stats
.gptcl
;
1630 adapter
->net_stats
.rx_bytes
= adapter
->stats
.gorcl
;
1631 adapter
->net_stats
.tx_bytes
= adapter
->stats
.gotcl
;
1632 adapter
->net_stats
.multicast
= adapter
->stats
.mprcl
;
1633 adapter
->net_stats
.collisions
= 0;
1635 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1636 * with a length in the type/len field */
1637 adapter
->net_stats
.rx_errors
=
1638 /* adapter->stats.rnbc + */ adapter
->stats
.crcerrs
+
1639 adapter
->stats
.ruc
+
1640 adapter
->stats
.roc
/*+ adapter->stats.rlec */ +
1641 adapter
->stats
.icbc
+
1642 adapter
->stats
.ecbc
+ adapter
->stats
.mpc
;
1645 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1648 adapter
->net_stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
1649 adapter
->net_stats
.rx_fifo_errors
= adapter
->stats
.mpc
;
1650 adapter
->net_stats
.rx_missed_errors
= adapter
->stats
.mpc
;
1651 adapter
->net_stats
.rx_over_errors
= adapter
->stats
.mpc
;
1653 adapter
->net_stats
.tx_errors
= 0;
1654 adapter
->net_stats
.rx_frame_errors
= 0;
1655 adapter
->net_stats
.tx_aborted_errors
= 0;
1656 adapter
->net_stats
.tx_carrier_errors
= 0;
1657 adapter
->net_stats
.tx_fifo_errors
= 0;
1658 adapter
->net_stats
.tx_heartbeat_errors
= 0;
1659 adapter
->net_stats
.tx_window_errors
= 0;
1662 #define IXGB_MAX_INTR 10
1664 * ixgb_intr - Interrupt Handler
1665 * @irq: interrupt number
1666 * @data: pointer to a network interface device structure
1667 * @pt_regs: CPU registers structure
1671 ixgb_intr(int irq
, void *data
, struct pt_regs
*regs
)
1673 struct net_device
*netdev
= data
;
1674 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1675 struct ixgb_hw
*hw
= &adapter
->hw
;
1676 uint32_t icr
= IXGB_READ_REG(hw
, ICR
);
1677 #ifndef CONFIG_IXGB_NAPI
1682 return IRQ_NONE
; /* Not our interrupt */
1684 if(unlikely(icr
& (IXGB_INT_RXSEQ
| IXGB_INT_LSC
))) {
1685 mod_timer(&adapter
->watchdog_timer
, jiffies
);
1688 #ifdef CONFIG_IXGB_NAPI
1689 if(netif_rx_schedule_prep(netdev
)) {
1691 /* Disable interrupts and register for poll. The flush
1692 of the posted write is intentionally left out.
1695 atomic_inc(&adapter
->irq_sem
);
1696 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
1697 __netif_rx_schedule(netdev
);
1700 /* yes, that is actually a & and it is meant to make sure that
1701 * every pass through this for loop checks both receive and
1702 * transmit queues for completed descriptors, intended to
1703 * avoid starvation issues and assist tx/rx fairness. */
1704 for(i
= 0; i
< IXGB_MAX_INTR
; i
++)
1705 if(!ixgb_clean_rx_irq(adapter
) &
1706 !ixgb_clean_tx_irq(adapter
))
1712 #ifdef CONFIG_IXGB_NAPI
1714 * ixgb_clean - NAPI Rx polling callback
1715 * @adapter: board private structure
1719 ixgb_clean(struct net_device
*netdev
, int *budget
)
1721 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1722 int work_to_do
= min(*budget
, netdev
->quota
);
1726 tx_cleaned
= ixgb_clean_tx_irq(adapter
);
1727 ixgb_clean_rx_irq(adapter
, &work_done
, work_to_do
);
1729 *budget
-= work_done
;
1730 netdev
->quota
-= work_done
;
1732 /* if no Tx and not enough Rx work done, exit the polling mode */
1733 if((!tx_cleaned
&& (work_done
== 0)) || !netif_running(netdev
)) {
1734 netif_rx_complete(netdev
);
1735 ixgb_irq_enable(adapter
);
1744 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1745 * @adapter: board private structure
1749 ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
)
1751 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1752 struct net_device
*netdev
= adapter
->netdev
;
1753 struct ixgb_tx_desc
*tx_desc
, *eop_desc
;
1754 struct ixgb_buffer
*buffer_info
;
1755 unsigned int i
, eop
;
1756 boolean_t cleaned
= FALSE
;
1758 i
= tx_ring
->next_to_clean
;
1759 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1760 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1762 while(eop_desc
->status
& IXGB_TX_DESC_STATUS_DD
) {
1764 for(cleaned
= FALSE
; !cleaned
; ) {
1765 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1766 buffer_info
= &tx_ring
->buffer_info
[i
];
1769 & (IXGB_TX_DESC_POPTS_TXSM
|
1770 IXGB_TX_DESC_POPTS_IXSM
))
1771 adapter
->hw_csum_tx_good
++;
1773 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
1775 *(uint32_t *)&(tx_desc
->status
) = 0;
1777 cleaned
= (i
== eop
);
1778 if(++i
== tx_ring
->count
) i
= 0;
1781 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1782 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1785 tx_ring
->next_to_clean
= i
;
1787 if (unlikely(netif_queue_stopped(netdev
))) {
1788 spin_lock(&adapter
->tx_lock
);
1789 if (netif_queue_stopped(netdev
) && netif_carrier_ok(netdev
) &&
1790 (IXGB_DESC_UNUSED(tx_ring
) > IXGB_TX_QUEUE_WAKE
))
1791 netif_wake_queue(netdev
);
1792 spin_unlock(&adapter
->tx_lock
);
1795 if(adapter
->detect_tx_hung
) {
1796 /* detect a transmit hang in hardware, this serializes the
1797 * check with the clearing of time_stamp and movement of i */
1798 adapter
->detect_tx_hung
= FALSE
;
1799 if (tx_ring
->buffer_info
[eop
].dma
&&
1800 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+ HZ
)
1801 && !(IXGB_READ_REG(&adapter
->hw
, STATUS
) &
1802 IXGB_STATUS_TXOFF
)) {
1803 /* detected Tx unit hang */
1804 DPRINTK(DRV
, ERR
, "Detected Tx Unit Hang\n"
1807 " next_to_use <%x>\n"
1808 " next_to_clean <%x>\n"
1809 "buffer_info[next_to_clean]\n"
1810 " time_stamp <%lx>\n"
1811 " next_to_watch <%x>\n"
1813 " next_to_watch.status <%x>\n",
1814 IXGB_READ_REG(&adapter
->hw
, TDH
),
1815 IXGB_READ_REG(&adapter
->hw
, TDT
),
1816 tx_ring
->next_to_use
,
1817 tx_ring
->next_to_clean
,
1818 tx_ring
->buffer_info
[eop
].time_stamp
,
1822 netif_stop_queue(netdev
);
1830 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1831 * @adapter: board private structure
1832 * @rx_desc: receive descriptor
1833 * @sk_buff: socket buffer with received data
1837 ixgb_rx_checksum(struct ixgb_adapter
*adapter
,
1838 struct ixgb_rx_desc
*rx_desc
,
1839 struct sk_buff
*skb
)
1841 /* Ignore Checksum bit is set OR
1842 * TCP Checksum has not been calculated
1844 if((rx_desc
->status
& IXGB_RX_DESC_STATUS_IXSM
) ||
1845 (!(rx_desc
->status
& IXGB_RX_DESC_STATUS_TCPCS
))) {
1846 skb
->ip_summed
= CHECKSUM_NONE
;
1850 /* At this point we know the hardware did the TCP checksum */
1851 /* now look at the TCP checksum error bit */
1852 if(rx_desc
->errors
& IXGB_RX_DESC_ERRORS_TCPE
) {
1853 /* let the stack verify checksum errors */
1854 skb
->ip_summed
= CHECKSUM_NONE
;
1855 adapter
->hw_csum_rx_error
++;
1857 /* TCP checksum is good */
1858 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1859 adapter
->hw_csum_rx_good
++;
1864 * ixgb_clean_rx_irq - Send received data up the network stack,
1865 * @adapter: board private structure
1869 #ifdef CONFIG_IXGB_NAPI
1870 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
, int *work_done
, int work_to_do
)
1872 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
)
1875 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1876 struct net_device
*netdev
= adapter
->netdev
;
1877 struct pci_dev
*pdev
= adapter
->pdev
;
1878 struct ixgb_rx_desc
*rx_desc
, *next_rxd
;
1879 struct ixgb_buffer
*buffer_info
, *next_buffer
, *next2_buffer
;
1882 boolean_t cleaned
= FALSE
;
1884 i
= rx_ring
->next_to_clean
;
1885 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
1886 buffer_info
= &rx_ring
->buffer_info
[i
];
1888 while(rx_desc
->status
& IXGB_RX_DESC_STATUS_DD
) {
1889 struct sk_buff
*skb
, *next_skb
;
1892 #ifdef CONFIG_IXGB_NAPI
1893 if(*work_done
>= work_to_do
)
1898 status
= rx_desc
->status
;
1899 skb
= buffer_info
->skb
;
1900 buffer_info
->skb
= NULL
;
1902 prefetch(skb
->data
);
1904 if(++i
== rx_ring
->count
) i
= 0;
1905 next_rxd
= IXGB_RX_DESC(*rx_ring
, i
);
1908 if((j
= i
+ 1) == rx_ring
->count
) j
= 0;
1909 next2_buffer
= &rx_ring
->buffer_info
[j
];
1910 prefetch(next2_buffer
);
1912 next_buffer
= &rx_ring
->buffer_info
[i
];
1913 next_skb
= next_buffer
->skb
;
1918 pci_unmap_single(pdev
,
1920 buffer_info
->length
,
1921 PCI_DMA_FROMDEVICE
);
1923 length
= le16_to_cpu(rx_desc
->length
);
1925 if(unlikely(!(status
& IXGB_RX_DESC_STATUS_EOP
))) {
1927 /* All receives must fit into a single buffer */
1929 IXGB_DBG("Receive packet consumed multiple buffers "
1930 "length<%x>\n", length
);
1932 dev_kfree_skb_irq(skb
);
1936 if (unlikely(rx_desc
->errors
1937 & (IXGB_RX_DESC_ERRORS_CE
| IXGB_RX_DESC_ERRORS_SE
1938 | IXGB_RX_DESC_ERRORS_P
|
1939 IXGB_RX_DESC_ERRORS_RXE
))) {
1941 dev_kfree_skb_irq(skb
);
1945 /* code added for copybreak, this should improve
1946 * performance for small packets with large amounts
1947 * of reassembly being done in the stack */
1948 #define IXGB_CB_LENGTH 256
1949 if (length
< IXGB_CB_LENGTH
) {
1950 struct sk_buff
*new_skb
=
1951 netdev_alloc_skb(netdev
, length
+ NET_IP_ALIGN
);
1953 skb_reserve(new_skb
, NET_IP_ALIGN
);
1954 new_skb
->dev
= netdev
;
1955 memcpy(new_skb
->data
- NET_IP_ALIGN
,
1956 skb
->data
- NET_IP_ALIGN
,
1957 length
+ NET_IP_ALIGN
);
1958 /* save the skb in buffer_info as good */
1959 buffer_info
->skb
= skb
;
1963 /* end copybreak code */
1966 skb_put(skb
, length
);
1968 /* Receive Checksum Offload */
1969 ixgb_rx_checksum(adapter
, rx_desc
, skb
);
1971 skb
->protocol
= eth_type_trans(skb
, netdev
);
1972 #ifdef CONFIG_IXGB_NAPI
1973 if(adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
1974 vlan_hwaccel_receive_skb(skb
, adapter
->vlgrp
,
1975 le16_to_cpu(rx_desc
->special
) &
1976 IXGB_RX_DESC_SPECIAL_VLAN_MASK
);
1978 netif_receive_skb(skb
);
1980 #else /* CONFIG_IXGB_NAPI */
1981 if(adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
1982 vlan_hwaccel_rx(skb
, adapter
->vlgrp
,
1983 le16_to_cpu(rx_desc
->special
) &
1984 IXGB_RX_DESC_SPECIAL_VLAN_MASK
);
1988 #endif /* CONFIG_IXGB_NAPI */
1989 netdev
->last_rx
= jiffies
;
1992 /* clean up descriptor, might be written over by hw */
1993 rx_desc
->status
= 0;
1995 /* use prefetched values */
1997 buffer_info
= next_buffer
;
2000 rx_ring
->next_to_clean
= i
;
2002 ixgb_alloc_rx_buffers(adapter
);
2008 * ixgb_alloc_rx_buffers - Replace used receive buffers
2009 * @adapter: address of board private structure
2013 ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
)
2015 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
2016 struct net_device
*netdev
= adapter
->netdev
;
2017 struct pci_dev
*pdev
= adapter
->pdev
;
2018 struct ixgb_rx_desc
*rx_desc
;
2019 struct ixgb_buffer
*buffer_info
;
2020 struct sk_buff
*skb
;
2022 int num_group_tail_writes
;
2025 i
= rx_ring
->next_to_use
;
2026 buffer_info
= &rx_ring
->buffer_info
[i
];
2027 cleancount
= IXGB_DESC_UNUSED(rx_ring
);
2029 num_group_tail_writes
= IXGB_RX_BUFFER_WRITE
;
2031 /* leave three descriptors unused */
2032 while(--cleancount
> 2) {
2033 /* recycle! its good for you */
2034 if (!(skb
= buffer_info
->skb
))
2035 skb
= netdev_alloc_skb(netdev
, adapter
->rx_buffer_len
2042 if (unlikely(!skb
)) {
2043 /* Better luck next round */
2044 adapter
->alloc_rx_buff_failed
++;
2048 /* Make buffer alignment 2 beyond a 16 byte boundary
2049 * this will result in a 16 byte aligned IP header after
2050 * the 14 byte MAC header is removed
2052 skb_reserve(skb
, NET_IP_ALIGN
);
2056 buffer_info
->skb
= skb
;
2057 buffer_info
->length
= adapter
->rx_buffer_len
;
2059 buffer_info
->dma
= pci_map_single(pdev
,
2061 adapter
->rx_buffer_len
,
2062 PCI_DMA_FROMDEVICE
);
2064 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
2065 rx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
2066 /* guarantee DD bit not set now before h/w gets descriptor
2067 * this is the rest of the workaround for h/w double
2069 rx_desc
->status
= 0;
2072 if(++i
== rx_ring
->count
) i
= 0;
2073 buffer_info
= &rx_ring
->buffer_info
[i
];
2076 if (likely(rx_ring
->next_to_use
!= i
)) {
2077 rx_ring
->next_to_use
= i
;
2078 if (unlikely(i
-- == 0))
2079 i
= (rx_ring
->count
- 1);
2081 /* Force memory writes to complete before letting h/w
2082 * know there are new descriptors to fetch. (Only
2083 * applicable for weak-ordered memory model archs, such
2086 IXGB_WRITE_REG(&adapter
->hw
, RDT
, i
);
2091 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2093 * @param netdev network interface device structure
2094 * @param grp indicates to enable or disable tagging/stripping
2097 ixgb_vlan_rx_register(struct net_device
*netdev
, struct vlan_group
*grp
)
2099 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2100 uint32_t ctrl
, rctl
;
2102 ixgb_irq_disable(adapter
);
2103 adapter
->vlgrp
= grp
;
2106 /* enable VLAN tag insert/strip */
2107 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2108 ctrl
|= IXGB_CTRL0_VME
;
2109 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2111 /* enable VLAN receive filtering */
2113 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2114 rctl
|= IXGB_RCTL_VFE
;
2115 rctl
&= ~IXGB_RCTL_CFIEN
;
2116 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2118 /* disable VLAN tag insert/strip */
2120 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2121 ctrl
&= ~IXGB_CTRL0_VME
;
2122 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2124 /* disable VLAN filtering */
2126 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2127 rctl
&= ~IXGB_RCTL_VFE
;
2128 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2131 ixgb_irq_enable(adapter
);
2135 ixgb_vlan_rx_add_vid(struct net_device
*netdev
, uint16_t vid
)
2137 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2138 uint32_t vfta
, index
;
2140 /* add VID to filter table */
2142 index
= (vid
>> 5) & 0x7F;
2143 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2144 vfta
|= (1 << (vid
& 0x1F));
2145 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2149 ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, uint16_t vid
)
2151 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2152 uint32_t vfta
, index
;
2154 ixgb_irq_disable(adapter
);
2157 adapter
->vlgrp
->vlan_devices
[vid
] = NULL
;
2159 ixgb_irq_enable(adapter
);
2161 /* remove VID from filter table*/
2163 index
= (vid
>> 5) & 0x7F;
2164 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2165 vfta
&= ~(1 << (vid
& 0x1F));
2166 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2170 ixgb_restore_vlan(struct ixgb_adapter
*adapter
)
2172 ixgb_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
2174 if(adapter
->vlgrp
) {
2176 for(vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
2177 if(!adapter
->vlgrp
->vlan_devices
[vid
])
2179 ixgb_vlan_rx_add_vid(adapter
->netdev
, vid
);
2184 #ifdef CONFIG_NET_POLL_CONTROLLER
2186 * Polling 'interrupt' - used by things like netconsole to send skbs
2187 * without having to re-enable interrupts. It's not called while
2188 * the interrupt routine is executing.
2191 static void ixgb_netpoll(struct net_device
*dev
)
2193 struct ixgb_adapter
*adapter
= dev
->priv
;
2195 disable_irq(adapter
->pdev
->irq
);
2196 ixgb_intr(adapter
->pdev
->irq
, dev
, NULL
);
2197 enable_irq(adapter
->pdev
->irq
);