1 /*******************************************************************************
4 Copyright(c) 1999 - 2005 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 *******************************************************************************/
33 * - Make needlessly global code static -- bunk@stusta.de
34 * - ethtool cleanup -- shemminger@osdl.org
35 * - Support for MODULE_VERSION -- linville@tuxdriver.com
36 * - add skb_header_cloned check to the tso path -- herbert@apana.org.au
38 * - include fix to the condition that determines when to quit NAPI - Robert Olsson
39 * - use netif_poll_{disable/enable} to synchronize between NAPI and i/f up/down
41 * - reset buffer_info->dma in Tx resource cleanup logic
43 * - sparse cleanup - shemminger@osdl.org
44 * - fix tx resource cleanup logic
47 char ixgb_driver_name
[] = "ixgb";
48 static char ixgb_driver_string
[] = "Intel(R) PRO/10GbE Network Driver";
50 #ifndef CONFIG_IXGB_NAPI
53 #define DRIVERNAPI "-NAPI"
55 #define DRV_VERSION "1.0.104-k4"DRIVERNAPI
56 char ixgb_driver_version
[] = DRV_VERSION
;
57 static char ixgb_copyright
[] = "Copyright (c) 1999-2005 Intel Corporation.";
59 /* ixgb_pci_tbl - PCI Device ID Table
61 * Wildcard entries (PCI_ANY_ID) should come last
62 * Last entry must be all 0s
64 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
65 * Class, Class Mask, private data (not used) }
67 static struct pci_device_id ixgb_pci_tbl
[] = {
68 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX
,
69 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
70 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_CX4
,
71 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
72 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_SR
,
73 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
74 {INTEL_VENDOR_ID
, IXGB_DEVICE_ID_82597EX_LR
,
75 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
77 /* required last entry */
81 MODULE_DEVICE_TABLE(pci
, ixgb_pci_tbl
);
83 /* Local Function Prototypes */
85 int ixgb_up(struct ixgb_adapter
*adapter
);
86 void ixgb_down(struct ixgb_adapter
*adapter
, boolean_t kill_watchdog
);
87 void ixgb_reset(struct ixgb_adapter
*adapter
);
88 int ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
);
89 int ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
);
90 void ixgb_free_tx_resources(struct ixgb_adapter
*adapter
);
91 void ixgb_free_rx_resources(struct ixgb_adapter
*adapter
);
92 void ixgb_update_stats(struct ixgb_adapter
*adapter
);
94 static int ixgb_init_module(void);
95 static void ixgb_exit_module(void);
96 static int ixgb_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
97 static void __devexit
ixgb_remove(struct pci_dev
*pdev
);
98 static int ixgb_sw_init(struct ixgb_adapter
*adapter
);
99 static int ixgb_open(struct net_device
*netdev
);
100 static int ixgb_close(struct net_device
*netdev
);
101 static void ixgb_configure_tx(struct ixgb_adapter
*adapter
);
102 static void ixgb_configure_rx(struct ixgb_adapter
*adapter
);
103 static void ixgb_setup_rctl(struct ixgb_adapter
*adapter
);
104 static void ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
);
105 static void ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
);
106 static void ixgb_set_multi(struct net_device
*netdev
);
107 static void ixgb_watchdog(unsigned long data
);
108 static int ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
);
109 static struct net_device_stats
*ixgb_get_stats(struct net_device
*netdev
);
110 static int ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
);
111 static int ixgb_set_mac(struct net_device
*netdev
, void *p
);
112 static irqreturn_t
ixgb_intr(int irq
, void *data
, struct pt_regs
*regs
);
113 static boolean_t
ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
);
115 #ifdef CONFIG_IXGB_NAPI
116 static int ixgb_clean(struct net_device
*netdev
, int *budget
);
117 static boolean_t
ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
,
118 int *work_done
, int work_to_do
);
120 static boolean_t
ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
);
122 static void ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
);
123 void ixgb_set_ethtool_ops(struct net_device
*netdev
);
124 static void ixgb_tx_timeout(struct net_device
*dev
);
125 static void ixgb_tx_timeout_task(struct net_device
*dev
);
126 static void ixgb_vlan_rx_register(struct net_device
*netdev
,
127 struct vlan_group
*grp
);
128 static void ixgb_vlan_rx_add_vid(struct net_device
*netdev
, uint16_t vid
);
129 static void ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, uint16_t vid
);
130 static void ixgb_restore_vlan(struct ixgb_adapter
*adapter
);
132 #ifdef CONFIG_NET_POLL_CONTROLLER
133 /* for netdump / net console */
134 static void ixgb_netpoll(struct net_device
*dev
);
137 /* Exported from other modules */
139 extern void ixgb_check_options(struct ixgb_adapter
*adapter
);
141 static struct pci_driver ixgb_driver
= {
142 .name
= ixgb_driver_name
,
143 .id_table
= ixgb_pci_tbl
,
145 .remove
= __devexit_p(ixgb_remove
),
148 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
149 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
150 MODULE_LICENSE("GPL");
151 MODULE_VERSION(DRV_VERSION
);
153 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
154 static int debug
= DEFAULT_DEBUG_LEVEL_SHIFT
;
155 module_param(debug
, int, 0);
156 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
158 /* some defines for controlling descriptor fetches in h/w */
159 #define RXDCTL_WTHRESH_DEFAULT 16 /* chip writes back at this many or RXT0 */
160 #define RXDCTL_PTHRESH_DEFAULT 0 /* chip considers prefech below
162 #define RXDCTL_HTHRESH_DEFAULT 0 /* chip will only prefetch if tail
163 * is pushed this many descriptors
167 * ixgb_init_module - Driver Registration Routine
169 * ixgb_init_module is the first routine called when the driver is
170 * loaded. All it does is register with the PCI subsystem.
174 ixgb_init_module(void)
176 printk(KERN_INFO
"%s - version %s\n",
177 ixgb_driver_string
, ixgb_driver_version
);
179 printk(KERN_INFO
"%s\n", ixgb_copyright
);
181 return pci_module_init(&ixgb_driver
);
184 module_init(ixgb_init_module
);
187 * ixgb_exit_module - Driver Exit Cleanup Routine
189 * ixgb_exit_module is called just before the driver is removed
194 ixgb_exit_module(void)
196 pci_unregister_driver(&ixgb_driver
);
199 module_exit(ixgb_exit_module
);
202 * ixgb_irq_disable - Mask off interrupt generation on the NIC
203 * @adapter: board private structure
207 ixgb_irq_disable(struct ixgb_adapter
*adapter
)
209 atomic_inc(&adapter
->irq_sem
);
210 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
211 IXGB_WRITE_FLUSH(&adapter
->hw
);
212 synchronize_irq(adapter
->pdev
->irq
);
216 * ixgb_irq_enable - Enable default interrupt generation settings
217 * @adapter: board private structure
221 ixgb_irq_enable(struct ixgb_adapter
*adapter
)
223 if(atomic_dec_and_test(&adapter
->irq_sem
)) {
224 IXGB_WRITE_REG(&adapter
->hw
, IMS
,
225 IXGB_INT_RXT0
| IXGB_INT_RXDMT0
| IXGB_INT_TXDW
|
227 IXGB_WRITE_FLUSH(&adapter
->hw
);
232 ixgb_up(struct ixgb_adapter
*adapter
)
234 struct net_device
*netdev
= adapter
->netdev
;
236 int max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
237 struct ixgb_hw
*hw
= &adapter
->hw
;
239 /* hardware has been reset, we need to reload some things */
241 ixgb_rar_set(hw
, netdev
->dev_addr
, 0);
242 ixgb_set_multi(netdev
);
244 ixgb_restore_vlan(adapter
);
246 ixgb_configure_tx(adapter
);
247 ixgb_setup_rctl(adapter
);
248 ixgb_configure_rx(adapter
);
249 ixgb_alloc_rx_buffers(adapter
);
251 /* disable interrupts and get the hardware into a known state */
252 IXGB_WRITE_REG(&adapter
->hw
, IMC
, 0xffffffff);
254 #ifdef CONFIG_PCI_MSI
256 boolean_t pcix
= (IXGB_READ_REG(&adapter
->hw
, STATUS
) &
257 IXGB_STATUS_PCIX_MODE
) ? TRUE
: FALSE
;
258 adapter
->have_msi
= TRUE
;
261 adapter
->have_msi
= FALSE
;
262 else if((err
= pci_enable_msi(adapter
->pdev
))) {
264 "Unable to allocate MSI interrupt Error: %d\n", err
);
265 adapter
->have_msi
= FALSE
;
266 /* proceed to try to request regular interrupt */
271 if((err
= request_irq(adapter
->pdev
->irq
, &ixgb_intr
,
272 SA_SHIRQ
| SA_SAMPLE_RANDOM
,
273 netdev
->name
, netdev
))) {
275 "Unable to allocate interrupt Error: %d\n", err
);
279 if((hw
->max_frame_size
!= max_frame
) ||
280 (hw
->max_frame_size
!=
281 (IXGB_READ_REG(hw
, MFS
) >> IXGB_MFS_SHIFT
))) {
283 hw
->max_frame_size
= max_frame
;
285 IXGB_WRITE_REG(hw
, MFS
, hw
->max_frame_size
<< IXGB_MFS_SHIFT
);
287 if(hw
->max_frame_size
>
288 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
) {
289 uint32_t ctrl0
= IXGB_READ_REG(hw
, CTRL0
);
291 if(!(ctrl0
& IXGB_CTRL0_JFE
)) {
292 ctrl0
|= IXGB_CTRL0_JFE
;
293 IXGB_WRITE_REG(hw
, CTRL0
, ctrl0
);
298 mod_timer(&adapter
->watchdog_timer
, jiffies
);
300 #ifdef CONFIG_IXGB_NAPI
301 netif_poll_enable(netdev
);
303 ixgb_irq_enable(adapter
);
309 ixgb_down(struct ixgb_adapter
*adapter
, boolean_t kill_watchdog
)
311 struct net_device
*netdev
= adapter
->netdev
;
313 ixgb_irq_disable(adapter
);
314 free_irq(adapter
->pdev
->irq
, netdev
);
315 #ifdef CONFIG_PCI_MSI
316 if(adapter
->have_msi
== TRUE
)
317 pci_disable_msi(adapter
->pdev
);
321 del_timer_sync(&adapter
->watchdog_timer
);
322 #ifdef CONFIG_IXGB_NAPI
323 netif_poll_disable(netdev
);
325 adapter
->link_speed
= 0;
326 adapter
->link_duplex
= 0;
327 netif_carrier_off(netdev
);
328 netif_stop_queue(netdev
);
331 ixgb_clean_tx_ring(adapter
);
332 ixgb_clean_rx_ring(adapter
);
336 ixgb_reset(struct ixgb_adapter
*adapter
)
339 ixgb_adapter_stop(&adapter
->hw
);
340 if(!ixgb_init_hw(&adapter
->hw
))
341 DPRINTK(PROBE
, ERR
, "ixgb_init_hw failed.\n");
345 * ixgb_probe - Device Initialization Routine
346 * @pdev: PCI device information struct
347 * @ent: entry in ixgb_pci_tbl
349 * Returns 0 on success, negative on failure
351 * ixgb_probe initializes an adapter identified by a pci_dev structure.
352 * The OS initialization, configuring of the adapter private structure,
353 * and a hardware reset occur.
357 ixgb_probe(struct pci_dev
*pdev
,
358 const struct pci_device_id
*ent
)
360 struct net_device
*netdev
= NULL
;
361 struct ixgb_adapter
*adapter
;
362 static int cards_found
= 0;
363 unsigned long mmio_start
;
369 if((err
= pci_enable_device(pdev
)))
372 if(!(err
= pci_set_dma_mask(pdev
, DMA_64BIT_MASK
)) &&
373 !(err
= pci_set_consistent_dma_mask(pdev
, DMA_64BIT_MASK
))) {
376 if((err
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
)) ||
377 (err
= pci_set_consistent_dma_mask(pdev
, DMA_32BIT_MASK
))) {
379 "ixgb: No usable DMA configuration, aborting\n");
385 if((err
= pci_request_regions(pdev
, ixgb_driver_name
)))
386 goto err_request_regions
;
388 pci_set_master(pdev
);
390 netdev
= alloc_etherdev(sizeof(struct ixgb_adapter
));
393 goto err_alloc_etherdev
;
396 SET_MODULE_OWNER(netdev
);
397 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
399 pci_set_drvdata(pdev
, netdev
);
400 adapter
= netdev_priv(netdev
);
401 adapter
->netdev
= netdev
;
402 adapter
->pdev
= pdev
;
403 adapter
->hw
.back
= adapter
;
404 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_DEBUG_LEVEL_SHIFT
);
406 mmio_start
= pci_resource_start(pdev
, BAR_0
);
407 mmio_len
= pci_resource_len(pdev
, BAR_0
);
409 adapter
->hw
.hw_addr
= ioremap(mmio_start
, mmio_len
);
410 if(!adapter
->hw
.hw_addr
) {
415 for(i
= BAR_1
; i
<= BAR_5
; i
++) {
416 if(pci_resource_len(pdev
, i
) == 0)
418 if(pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
419 adapter
->hw
.io_base
= pci_resource_start(pdev
, i
);
424 netdev
->open
= &ixgb_open
;
425 netdev
->stop
= &ixgb_close
;
426 netdev
->hard_start_xmit
= &ixgb_xmit_frame
;
427 netdev
->get_stats
= &ixgb_get_stats
;
428 netdev
->set_multicast_list
= &ixgb_set_multi
;
429 netdev
->set_mac_address
= &ixgb_set_mac
;
430 netdev
->change_mtu
= &ixgb_change_mtu
;
431 ixgb_set_ethtool_ops(netdev
);
432 netdev
->tx_timeout
= &ixgb_tx_timeout
;
433 netdev
->watchdog_timeo
= 5 * HZ
;
434 #ifdef CONFIG_IXGB_NAPI
435 netdev
->poll
= &ixgb_clean
;
438 netdev
->vlan_rx_register
= ixgb_vlan_rx_register
;
439 netdev
->vlan_rx_add_vid
= ixgb_vlan_rx_add_vid
;
440 netdev
->vlan_rx_kill_vid
= ixgb_vlan_rx_kill_vid
;
441 #ifdef CONFIG_NET_POLL_CONTROLLER
442 netdev
->poll_controller
= ixgb_netpoll
;
445 strcpy(netdev
->name
, pci_name(pdev
));
446 netdev
->mem_start
= mmio_start
;
447 netdev
->mem_end
= mmio_start
+ mmio_len
;
448 netdev
->base_addr
= adapter
->hw
.io_base
;
450 adapter
->bd_number
= cards_found
;
451 adapter
->link_speed
= 0;
452 adapter
->link_duplex
= 0;
454 /* setup the private structure */
456 if((err
= ixgb_sw_init(adapter
)))
459 netdev
->features
= NETIF_F_SG
|
463 NETIF_F_HW_VLAN_FILTER
;
465 netdev
->features
|= NETIF_F_TSO
;
468 netdev
->features
|= NETIF_F_LLTX
;
472 netdev
->features
|= NETIF_F_HIGHDMA
;
474 /* make sure the EEPROM is good */
476 if(!ixgb_validate_eeprom_checksum(&adapter
->hw
)) {
477 DPRINTK(PROBE
, ERR
, "The EEPROM Checksum Is Not Valid\n");
482 ixgb_get_ee_mac_addr(&adapter
->hw
, netdev
->dev_addr
);
483 memcpy(netdev
->perm_addr
, netdev
->dev_addr
, netdev
->addr_len
);
485 if(!is_valid_ether_addr(netdev
->perm_addr
)) {
486 DPRINTK(PROBE
, ERR
, "Invalid MAC Address\n");
491 adapter
->part_num
= ixgb_get_ee_pba_number(&adapter
->hw
);
493 init_timer(&adapter
->watchdog_timer
);
494 adapter
->watchdog_timer
.function
= &ixgb_watchdog
;
495 adapter
->watchdog_timer
.data
= (unsigned long)adapter
;
497 INIT_WORK(&adapter
->tx_timeout_task
,
498 (void (*)(void *))ixgb_tx_timeout_task
, netdev
);
500 strcpy(netdev
->name
, "eth%d");
501 if((err
= register_netdev(netdev
)))
504 /* we're going to reset, so assume we have no link for now */
506 netif_carrier_off(netdev
);
507 netif_stop_queue(netdev
);
509 DPRINTK(PROBE
, INFO
, "Intel(R) PRO/10GbE Network Connection\n");
510 ixgb_check_options(adapter
);
511 /* reset the hardware with the new settings */
521 iounmap(adapter
->hw
.hw_addr
);
525 pci_release_regions(pdev
);
528 pci_disable_device(pdev
);
533 * ixgb_remove - Device Removal Routine
534 * @pdev: PCI device information struct
536 * ixgb_remove is called by the PCI subsystem to alert the driver
537 * that it should release a PCI device. The could be caused by a
538 * Hot-Plug event, or because the driver is going to be removed from
542 static void __devexit
543 ixgb_remove(struct pci_dev
*pdev
)
545 struct net_device
*netdev
= pci_get_drvdata(pdev
);
546 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
548 unregister_netdev(netdev
);
550 iounmap(adapter
->hw
.hw_addr
);
551 pci_release_regions(pdev
);
557 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
558 * @adapter: board private structure to initialize
560 * ixgb_sw_init initializes the Adapter private data structure.
561 * Fields are initialized based on PCI device information and
562 * OS network device settings (MTU size).
566 ixgb_sw_init(struct ixgb_adapter
*adapter
)
568 struct ixgb_hw
*hw
= &adapter
->hw
;
569 struct net_device
*netdev
= adapter
->netdev
;
570 struct pci_dev
*pdev
= adapter
->pdev
;
572 /* PCI config space info */
574 hw
->vendor_id
= pdev
->vendor
;
575 hw
->device_id
= pdev
->device
;
576 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
577 hw
->subsystem_id
= pdev
->subsystem_device
;
579 hw
->max_frame_size
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
580 adapter
->rx_buffer_len
= hw
->max_frame_size
;
582 if((hw
->device_id
== IXGB_DEVICE_ID_82597EX
)
583 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_CX4
)
584 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_LR
)
585 || (hw
->device_id
== IXGB_DEVICE_ID_82597EX_SR
))
586 hw
->mac_type
= ixgb_82597
;
588 /* should never have loaded on this device */
589 DPRINTK(PROBE
, ERR
, "unsupported device id\n");
592 /* enable flow control to be programmed */
595 atomic_set(&adapter
->irq_sem
, 1);
596 spin_lock_init(&adapter
->tx_lock
);
602 * ixgb_open - Called when a network interface is made active
603 * @netdev: network interface device structure
605 * Returns 0 on success, negative value on failure
607 * The open entry point is called when a network interface is made
608 * active by the system (IFF_UP). At this point all resources needed
609 * for transmit and receive operations are allocated, the interrupt
610 * handler is registered with the OS, the watchdog timer is started,
611 * and the stack is notified that the interface is ready.
615 ixgb_open(struct net_device
*netdev
)
617 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
620 /* allocate transmit descriptors */
622 if((err
= ixgb_setup_tx_resources(adapter
)))
625 /* allocate receive descriptors */
627 if((err
= ixgb_setup_rx_resources(adapter
)))
630 if((err
= ixgb_up(adapter
)))
636 ixgb_free_rx_resources(adapter
);
638 ixgb_free_tx_resources(adapter
);
646 * ixgb_close - Disables a network interface
647 * @netdev: network interface device structure
649 * Returns 0, this is not allowed to fail
651 * The close entry point is called when an interface is de-activated
652 * by the OS. The hardware is still under the drivers control, but
653 * needs to be disabled. A global MAC reset is issued to stop the
654 * hardware, and all transmit and receive resources are freed.
658 ixgb_close(struct net_device
*netdev
)
660 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
662 ixgb_down(adapter
, TRUE
);
664 ixgb_free_tx_resources(adapter
);
665 ixgb_free_rx_resources(adapter
);
671 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
672 * @adapter: board private structure
674 * Return 0 on success, negative on failure
678 ixgb_setup_tx_resources(struct ixgb_adapter
*adapter
)
680 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
681 struct pci_dev
*pdev
= adapter
->pdev
;
684 size
= sizeof(struct ixgb_buffer
) * txdr
->count
;
685 txdr
->buffer_info
= vmalloc(size
);
686 if(!txdr
->buffer_info
) {
688 "Unable to allocate transmit descriptor ring memory\n");
691 memset(txdr
->buffer_info
, 0, size
);
693 /* round up to nearest 4K */
695 txdr
->size
= txdr
->count
* sizeof(struct ixgb_tx_desc
);
696 IXGB_ROUNDUP(txdr
->size
, 4096);
698 txdr
->desc
= pci_alloc_consistent(pdev
, txdr
->size
, &txdr
->dma
);
700 vfree(txdr
->buffer_info
);
702 "Unable to allocate transmit descriptor memory\n");
705 memset(txdr
->desc
, 0, txdr
->size
);
707 txdr
->next_to_use
= 0;
708 txdr
->next_to_clean
= 0;
714 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
715 * @adapter: board private structure
717 * Configure the Tx unit of the MAC after a reset.
721 ixgb_configure_tx(struct ixgb_adapter
*adapter
)
723 uint64_t tdba
= adapter
->tx_ring
.dma
;
724 uint32_t tdlen
= adapter
->tx_ring
.count
* sizeof(struct ixgb_tx_desc
);
726 struct ixgb_hw
*hw
= &adapter
->hw
;
728 /* Setup the Base and Length of the Tx Descriptor Ring
729 * tx_ring.dma can be either a 32 or 64 bit value
732 IXGB_WRITE_REG(hw
, TDBAL
, (tdba
& 0x00000000ffffffffULL
));
733 IXGB_WRITE_REG(hw
, TDBAH
, (tdba
>> 32));
735 IXGB_WRITE_REG(hw
, TDLEN
, tdlen
);
737 /* Setup the HW Tx Head and Tail descriptor pointers */
739 IXGB_WRITE_REG(hw
, TDH
, 0);
740 IXGB_WRITE_REG(hw
, TDT
, 0);
742 /* don't set up txdctl, it induces performance problems if configured
744 /* Set the Tx Interrupt Delay register */
746 IXGB_WRITE_REG(hw
, TIDV
, adapter
->tx_int_delay
);
748 /* Program the Transmit Control Register */
750 tctl
= IXGB_TCTL_TCE
| IXGB_TCTL_TXEN
| IXGB_TCTL_TPDE
;
751 IXGB_WRITE_REG(hw
, TCTL
, tctl
);
753 /* Setup Transmit Descriptor Settings for this adapter */
754 adapter
->tx_cmd_type
=
756 | (adapter
->tx_int_delay_enable
? IXGB_TX_DESC_CMD_IDE
: 0);
760 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
761 * @adapter: board private structure
763 * Returns 0 on success, negative on failure
767 ixgb_setup_rx_resources(struct ixgb_adapter
*adapter
)
769 struct ixgb_desc_ring
*rxdr
= &adapter
->rx_ring
;
770 struct pci_dev
*pdev
= adapter
->pdev
;
773 size
= sizeof(struct ixgb_buffer
) * rxdr
->count
;
774 rxdr
->buffer_info
= vmalloc(size
);
775 if(!rxdr
->buffer_info
) {
777 "Unable to allocate receive descriptor ring\n");
780 memset(rxdr
->buffer_info
, 0, size
);
782 /* Round up to nearest 4K */
784 rxdr
->size
= rxdr
->count
* sizeof(struct ixgb_rx_desc
);
785 IXGB_ROUNDUP(rxdr
->size
, 4096);
787 rxdr
->desc
= pci_alloc_consistent(pdev
, rxdr
->size
, &rxdr
->dma
);
790 vfree(rxdr
->buffer_info
);
792 "Unable to allocate receive descriptors\n");
795 memset(rxdr
->desc
, 0, rxdr
->size
);
797 rxdr
->next_to_clean
= 0;
798 rxdr
->next_to_use
= 0;
804 * ixgb_setup_rctl - configure the receive control register
805 * @adapter: Board private structure
809 ixgb_setup_rctl(struct ixgb_adapter
*adapter
)
813 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
815 rctl
&= ~(3 << IXGB_RCTL_MO_SHIFT
);
818 IXGB_RCTL_BAM
| IXGB_RCTL_RDMTS_1_2
|
819 IXGB_RCTL_RXEN
| IXGB_RCTL_CFF
|
820 (adapter
->hw
.mc_filter_type
<< IXGB_RCTL_MO_SHIFT
);
822 rctl
|= IXGB_RCTL_SECRC
;
824 if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_2048
)
825 rctl
|= IXGB_RCTL_BSIZE_2048
;
826 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_4096
)
827 rctl
|= IXGB_RCTL_BSIZE_4096
;
828 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_8192
)
829 rctl
|= IXGB_RCTL_BSIZE_8192
;
830 else if (adapter
->rx_buffer_len
<= IXGB_RXBUFFER_16384
)
831 rctl
|= IXGB_RCTL_BSIZE_16384
;
833 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
837 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
838 * @adapter: board private structure
840 * Configure the Rx unit of the MAC after a reset.
844 ixgb_configure_rx(struct ixgb_adapter
*adapter
)
846 uint64_t rdba
= adapter
->rx_ring
.dma
;
847 uint32_t rdlen
= adapter
->rx_ring
.count
* sizeof(struct ixgb_rx_desc
);
848 struct ixgb_hw
*hw
= &adapter
->hw
;
853 /* make sure receives are disabled while setting up the descriptors */
855 rctl
= IXGB_READ_REG(hw
, RCTL
);
856 IXGB_WRITE_REG(hw
, RCTL
, rctl
& ~IXGB_RCTL_RXEN
);
858 /* set the Receive Delay Timer Register */
860 IXGB_WRITE_REG(hw
, RDTR
, adapter
->rx_int_delay
);
862 /* Setup the Base and Length of the Rx Descriptor Ring */
864 IXGB_WRITE_REG(hw
, RDBAL
, (rdba
& 0x00000000ffffffffULL
));
865 IXGB_WRITE_REG(hw
, RDBAH
, (rdba
>> 32));
867 IXGB_WRITE_REG(hw
, RDLEN
, rdlen
);
869 /* Setup the HW Rx Head and Tail Descriptor Pointers */
870 IXGB_WRITE_REG(hw
, RDH
, 0);
871 IXGB_WRITE_REG(hw
, RDT
, 0);
873 /* set up pre-fetching of receive buffers so we get some before we
874 * run out (default hardware behavior is to run out before fetching
875 * more). This sets up to fetch if HTHRESH rx descriptors are avail
876 * and the descriptors in hw cache are below PTHRESH. This avoids
877 * the hardware behavior of fetching <=512 descriptors in a single
878 * burst that pre-empts all other activity, usually causing fifo
880 /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
881 rxdctl
= RXDCTL_WTHRESH_DEFAULT
<< IXGB_RXDCTL_WTHRESH_SHIFT
|
882 RXDCTL_HTHRESH_DEFAULT
<< IXGB_RXDCTL_HTHRESH_SHIFT
|
883 RXDCTL_PTHRESH_DEFAULT
<< IXGB_RXDCTL_PTHRESH_SHIFT
;
884 IXGB_WRITE_REG(hw
, RXDCTL
, rxdctl
);
886 /* Enable Receive Checksum Offload for TCP and UDP */
887 if(adapter
->rx_csum
== TRUE
) {
888 rxcsum
= IXGB_READ_REG(hw
, RXCSUM
);
889 rxcsum
|= IXGB_RXCSUM_TUOFL
;
890 IXGB_WRITE_REG(hw
, RXCSUM
, rxcsum
);
893 /* Enable Receives */
895 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
899 * ixgb_free_tx_resources - Free Tx Resources
900 * @adapter: board private structure
902 * Free all transmit software resources
906 ixgb_free_tx_resources(struct ixgb_adapter
*adapter
)
908 struct pci_dev
*pdev
= adapter
->pdev
;
910 ixgb_clean_tx_ring(adapter
);
912 vfree(adapter
->tx_ring
.buffer_info
);
913 adapter
->tx_ring
.buffer_info
= NULL
;
915 pci_free_consistent(pdev
, adapter
->tx_ring
.size
,
916 adapter
->tx_ring
.desc
, adapter
->tx_ring
.dma
);
918 adapter
->tx_ring
.desc
= NULL
;
922 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter
*adapter
,
923 struct ixgb_buffer
*buffer_info
)
925 struct pci_dev
*pdev
= adapter
->pdev
;
927 if (buffer_info
->dma
)
928 pci_unmap_page(pdev
, buffer_info
->dma
, buffer_info
->length
,
931 if (buffer_info
->skb
)
932 dev_kfree_skb_any(buffer_info
->skb
);
934 buffer_info
->skb
= NULL
;
935 buffer_info
->dma
= 0;
936 buffer_info
->time_stamp
= 0;
937 /* these fields must always be initialized in tx
938 * buffer_info->length = 0;
939 * buffer_info->next_to_watch = 0; */
943 * ixgb_clean_tx_ring - Free Tx Buffers
944 * @adapter: board private structure
948 ixgb_clean_tx_ring(struct ixgb_adapter
*adapter
)
950 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
951 struct ixgb_buffer
*buffer_info
;
955 /* Free all the Tx ring sk_buffs */
957 for(i
= 0; i
< tx_ring
->count
; i
++) {
958 buffer_info
= &tx_ring
->buffer_info
[i
];
959 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
962 size
= sizeof(struct ixgb_buffer
) * tx_ring
->count
;
963 memset(tx_ring
->buffer_info
, 0, size
);
965 /* Zero out the descriptor ring */
967 memset(tx_ring
->desc
, 0, tx_ring
->size
);
969 tx_ring
->next_to_use
= 0;
970 tx_ring
->next_to_clean
= 0;
972 IXGB_WRITE_REG(&adapter
->hw
, TDH
, 0);
973 IXGB_WRITE_REG(&adapter
->hw
, TDT
, 0);
977 * ixgb_free_rx_resources - Free Rx Resources
978 * @adapter: board private structure
980 * Free all receive software resources
984 ixgb_free_rx_resources(struct ixgb_adapter
*adapter
)
986 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
987 struct pci_dev
*pdev
= adapter
->pdev
;
989 ixgb_clean_rx_ring(adapter
);
991 vfree(rx_ring
->buffer_info
);
992 rx_ring
->buffer_info
= NULL
;
994 pci_free_consistent(pdev
, rx_ring
->size
, rx_ring
->desc
, rx_ring
->dma
);
996 rx_ring
->desc
= NULL
;
1000 * ixgb_clean_rx_ring - Free Rx Buffers
1001 * @adapter: board private structure
1005 ixgb_clean_rx_ring(struct ixgb_adapter
*adapter
)
1007 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1008 struct ixgb_buffer
*buffer_info
;
1009 struct pci_dev
*pdev
= adapter
->pdev
;
1013 /* Free all the Rx ring sk_buffs */
1015 for(i
= 0; i
< rx_ring
->count
; i
++) {
1016 buffer_info
= &rx_ring
->buffer_info
[i
];
1017 if(buffer_info
->skb
) {
1019 pci_unmap_single(pdev
,
1021 buffer_info
->length
,
1022 PCI_DMA_FROMDEVICE
);
1024 dev_kfree_skb(buffer_info
->skb
);
1026 buffer_info
->skb
= NULL
;
1030 size
= sizeof(struct ixgb_buffer
) * rx_ring
->count
;
1031 memset(rx_ring
->buffer_info
, 0, size
);
1033 /* Zero out the descriptor ring */
1035 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1037 rx_ring
->next_to_clean
= 0;
1038 rx_ring
->next_to_use
= 0;
1040 IXGB_WRITE_REG(&adapter
->hw
, RDH
, 0);
1041 IXGB_WRITE_REG(&adapter
->hw
, RDT
, 0);
1045 * ixgb_set_mac - Change the Ethernet Address of the NIC
1046 * @netdev: network interface device structure
1047 * @p: pointer to an address structure
1049 * Returns 0 on success, negative on failure
1053 ixgb_set_mac(struct net_device
*netdev
, void *p
)
1055 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1056 struct sockaddr
*addr
= p
;
1058 if(!is_valid_ether_addr(addr
->sa_data
))
1059 return -EADDRNOTAVAIL
;
1061 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1063 ixgb_rar_set(&adapter
->hw
, addr
->sa_data
, 0);
1069 * ixgb_set_multi - Multicast and Promiscuous mode set
1070 * @netdev: network interface device structure
1072 * The set_multi entry point is called whenever the multicast address
1073 * list or the network interface flags are updated. This routine is
1074 * responsible for configuring the hardware for proper multicast,
1075 * promiscuous mode, and all-multi behavior.
1079 ixgb_set_multi(struct net_device
*netdev
)
1081 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1082 struct ixgb_hw
*hw
= &adapter
->hw
;
1083 struct dev_mc_list
*mc_ptr
;
1087 /* Check for Promiscuous and All Multicast modes */
1089 rctl
= IXGB_READ_REG(hw
, RCTL
);
1091 if(netdev
->flags
& IFF_PROMISC
) {
1092 rctl
|= (IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1093 } else if(netdev
->flags
& IFF_ALLMULTI
) {
1094 rctl
|= IXGB_RCTL_MPE
;
1095 rctl
&= ~IXGB_RCTL_UPE
;
1097 rctl
&= ~(IXGB_RCTL_UPE
| IXGB_RCTL_MPE
);
1100 if(netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
) {
1101 rctl
|= IXGB_RCTL_MPE
;
1102 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1104 uint8_t mta
[netdev
->mc_count
* IXGB_ETH_LENGTH_OF_ADDRESS
];
1106 IXGB_WRITE_REG(hw
, RCTL
, rctl
);
1108 for(i
= 0, mc_ptr
= netdev
->mc_list
; mc_ptr
;
1109 i
++, mc_ptr
= mc_ptr
->next
)
1110 memcpy(&mta
[i
* IXGB_ETH_LENGTH_OF_ADDRESS
],
1111 mc_ptr
->dmi_addr
, IXGB_ETH_LENGTH_OF_ADDRESS
);
1113 ixgb_mc_addr_list_update(hw
, mta
, netdev
->mc_count
, 0);
1118 * ixgb_watchdog - Timer Call-back
1119 * @data: pointer to netdev cast into an unsigned long
1123 ixgb_watchdog(unsigned long data
)
1125 struct ixgb_adapter
*adapter
= (struct ixgb_adapter
*)data
;
1126 struct net_device
*netdev
= adapter
->netdev
;
1127 struct ixgb_desc_ring
*txdr
= &adapter
->tx_ring
;
1129 ixgb_check_for_link(&adapter
->hw
);
1131 if (ixgb_check_for_bad_link(&adapter
->hw
)) {
1132 /* force the reset path */
1133 netif_stop_queue(netdev
);
1136 if(adapter
->hw
.link_up
) {
1137 if(!netif_carrier_ok(netdev
)) {
1139 "NIC Link is Up 10000 Mbps Full Duplex\n");
1140 adapter
->link_speed
= 10000;
1141 adapter
->link_duplex
= FULL_DUPLEX
;
1142 netif_carrier_on(netdev
);
1143 netif_wake_queue(netdev
);
1146 if(netif_carrier_ok(netdev
)) {
1147 adapter
->link_speed
= 0;
1148 adapter
->link_duplex
= 0;
1149 DPRINTK(LINK
, INFO
, "NIC Link is Down\n");
1150 netif_carrier_off(netdev
);
1151 netif_stop_queue(netdev
);
1156 ixgb_update_stats(adapter
);
1158 if(!netif_carrier_ok(netdev
)) {
1159 if(IXGB_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
1160 /* We've lost link, so the controller stops DMA,
1161 * but we've got queued Tx work that's never going
1162 * to get done, so reset controller to flush Tx.
1163 * (Do the reset outside of interrupt context). */
1164 schedule_work(&adapter
->tx_timeout_task
);
1168 /* Force detection of hung controller every watchdog period */
1169 adapter
->detect_tx_hung
= TRUE
;
1171 /* generate an interrupt to force clean up of any stragglers */
1172 IXGB_WRITE_REG(&adapter
->hw
, ICS
, IXGB_INT_TXDW
);
1174 /* Reset the timer */
1175 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 2 * HZ
);
1178 #define IXGB_TX_FLAGS_CSUM 0x00000001
1179 #define IXGB_TX_FLAGS_VLAN 0x00000002
1180 #define IXGB_TX_FLAGS_TSO 0x00000004
1183 ixgb_tso(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1186 struct ixgb_context_desc
*context_desc
;
1188 uint8_t ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
1189 uint16_t ipcse
, tucse
, mss
;
1192 if(likely(skb_shinfo(skb
)->tso_size
)) {
1193 if (skb_header_cloned(skb
)) {
1194 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
1199 hdr_len
= ((skb
->h
.raw
- skb
->data
) + (skb
->h
.th
->doff
<< 2));
1200 mss
= skb_shinfo(skb
)->tso_size
;
1201 skb
->nh
.iph
->tot_len
= 0;
1202 skb
->nh
.iph
->check
= 0;
1203 skb
->h
.th
->check
= ~csum_tcpudp_magic(skb
->nh
.iph
->saddr
,
1206 ipcss
= skb
->nh
.raw
- skb
->data
;
1207 ipcso
= (void *)&(skb
->nh
.iph
->check
) - (void *)skb
->data
;
1208 ipcse
= skb
->h
.raw
- skb
->data
- 1;
1209 tucss
= skb
->h
.raw
- skb
->data
;
1210 tucso
= (void *)&(skb
->h
.th
->check
) - (void *)skb
->data
;
1213 i
= adapter
->tx_ring
.next_to_use
;
1214 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1216 context_desc
->ipcss
= ipcss
;
1217 context_desc
->ipcso
= ipcso
;
1218 context_desc
->ipcse
= cpu_to_le16(ipcse
);
1219 context_desc
->tucss
= tucss
;
1220 context_desc
->tucso
= tucso
;
1221 context_desc
->tucse
= cpu_to_le16(tucse
);
1222 context_desc
->mss
= cpu_to_le16(mss
);
1223 context_desc
->hdr_len
= hdr_len
;
1224 context_desc
->status
= 0;
1225 context_desc
->cmd_type_len
= cpu_to_le32(
1226 IXGB_CONTEXT_DESC_TYPE
1227 | IXGB_CONTEXT_DESC_CMD_TSE
1228 | IXGB_CONTEXT_DESC_CMD_IP
1229 | IXGB_CONTEXT_DESC_CMD_TCP
1230 | IXGB_CONTEXT_DESC_CMD_IDE
1231 | (skb
->len
- (hdr_len
)));
1234 if(++i
== adapter
->tx_ring
.count
) i
= 0;
1235 adapter
->tx_ring
.next_to_use
= i
;
1244 static inline boolean_t
1245 ixgb_tx_csum(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
)
1247 struct ixgb_context_desc
*context_desc
;
1251 if(likely(skb
->ip_summed
== CHECKSUM_HW
)) {
1252 css
= skb
->h
.raw
- skb
->data
;
1253 cso
= (skb
->h
.raw
+ skb
->csum
) - skb
->data
;
1255 i
= adapter
->tx_ring
.next_to_use
;
1256 context_desc
= IXGB_CONTEXT_DESC(adapter
->tx_ring
, i
);
1258 context_desc
->tucss
= css
;
1259 context_desc
->tucso
= cso
;
1260 context_desc
->tucse
= 0;
1261 /* zero out any previously existing data in one instruction */
1262 *(uint32_t *)&(context_desc
->ipcss
) = 0;
1263 context_desc
->status
= 0;
1264 context_desc
->hdr_len
= 0;
1265 context_desc
->mss
= 0;
1266 context_desc
->cmd_type_len
=
1267 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1268 | IXGB_TX_DESC_CMD_IDE
);
1270 if(++i
== adapter
->tx_ring
.count
) i
= 0;
1271 adapter
->tx_ring
.next_to_use
= i
;
1279 #define IXGB_MAX_TXD_PWR 14
1280 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1283 ixgb_tx_map(struct ixgb_adapter
*adapter
, struct sk_buff
*skb
,
1286 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1287 struct ixgb_buffer
*buffer_info
;
1289 unsigned int offset
= 0, size
, count
= 0, i
;
1291 unsigned int nr_frags
= skb_shinfo(skb
)->nr_frags
;
1294 len
-= skb
->data_len
;
1296 i
= tx_ring
->next_to_use
;
1299 buffer_info
= &tx_ring
->buffer_info
[i
];
1300 size
= min(len
, IXGB_MAX_JUMBO_FRAME_SIZE
);
1301 buffer_info
->length
= size
;
1303 pci_map_single(adapter
->pdev
,
1307 buffer_info
->time_stamp
= jiffies
;
1308 buffer_info
->next_to_watch
= 0;
1313 if(++i
== tx_ring
->count
) i
= 0;
1316 for(f
= 0; f
< nr_frags
; f
++) {
1317 struct skb_frag_struct
*frag
;
1319 frag
= &skb_shinfo(skb
)->frags
[f
];
1324 buffer_info
= &tx_ring
->buffer_info
[i
];
1325 size
= min(len
, IXGB_MAX_JUMBO_FRAME_SIZE
);
1326 buffer_info
->length
= size
;
1328 pci_map_page(adapter
->pdev
,
1330 frag
->page_offset
+ offset
,
1333 buffer_info
->time_stamp
= jiffies
;
1334 buffer_info
->next_to_watch
= 0;
1339 if(++i
== tx_ring
->count
) i
= 0;
1342 i
= (i
== 0) ? tx_ring
->count
- 1 : i
- 1;
1343 tx_ring
->buffer_info
[i
].skb
= skb
;
1344 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
1350 ixgb_tx_queue(struct ixgb_adapter
*adapter
, int count
, int vlan_id
,int tx_flags
)
1352 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1353 struct ixgb_tx_desc
*tx_desc
= NULL
;
1354 struct ixgb_buffer
*buffer_info
;
1355 uint32_t cmd_type_len
= adapter
->tx_cmd_type
;
1360 if(tx_flags
& IXGB_TX_FLAGS_TSO
) {
1361 cmd_type_len
|= IXGB_TX_DESC_CMD_TSE
;
1362 popts
|= (IXGB_TX_DESC_POPTS_IXSM
| IXGB_TX_DESC_POPTS_TXSM
);
1365 if(tx_flags
& IXGB_TX_FLAGS_CSUM
)
1366 popts
|= IXGB_TX_DESC_POPTS_TXSM
;
1368 if(tx_flags
& IXGB_TX_FLAGS_VLAN
) {
1369 cmd_type_len
|= IXGB_TX_DESC_CMD_VLE
;
1372 i
= tx_ring
->next_to_use
;
1375 buffer_info
= &tx_ring
->buffer_info
[i
];
1376 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1377 tx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
1378 tx_desc
->cmd_type_len
=
1379 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
1380 tx_desc
->status
= status
;
1381 tx_desc
->popts
= popts
;
1382 tx_desc
->vlan
= cpu_to_le16(vlan_id
);
1384 if(++i
== tx_ring
->count
) i
= 0;
1387 tx_desc
->cmd_type_len
|= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1388 | IXGB_TX_DESC_CMD_RS
);
1390 /* Force memory writes to complete before letting h/w
1391 * know there are new descriptors to fetch. (Only
1392 * applicable for weak-ordered memory model archs,
1393 * such as IA-64). */
1396 tx_ring
->next_to_use
= i
;
1397 IXGB_WRITE_REG(&adapter
->hw
, TDT
, i
);
1400 /* Tx Descriptors needed, worst case */
1401 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1402 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1403 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) + \
1404 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1
1407 ixgb_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
1409 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1411 unsigned int tx_flags
= 0;
1412 unsigned long flags
;
1417 dev_kfree_skb_any(skb
);
1422 local_irq_save(flags
);
1423 if (!spin_trylock(&adapter
->tx_lock
)) {
1424 /* Collision - tell upper layer to requeue */
1425 local_irq_restore(flags
);
1426 return NETDEV_TX_LOCKED
;
1429 spin_lock_irqsave(&adapter
->tx_lock
, flags
);
1432 if(unlikely(IXGB_DESC_UNUSED(&adapter
->tx_ring
) < DESC_NEEDED
)) {
1433 netif_stop_queue(netdev
);
1434 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1435 return NETDEV_TX_BUSY
;
1438 #ifndef NETIF_F_LLTX
1439 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1442 if(adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
1443 tx_flags
|= IXGB_TX_FLAGS_VLAN
;
1444 vlan_id
= vlan_tx_tag_get(skb
);
1447 first
= adapter
->tx_ring
.next_to_use
;
1449 tso
= ixgb_tso(adapter
, skb
);
1451 dev_kfree_skb_any(skb
);
1453 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1455 return NETDEV_TX_OK
;
1459 tx_flags
|= IXGB_TX_FLAGS_TSO
;
1460 else if(ixgb_tx_csum(adapter
, skb
))
1461 tx_flags
|= IXGB_TX_FLAGS_CSUM
;
1463 ixgb_tx_queue(adapter
, ixgb_tx_map(adapter
, skb
, first
), vlan_id
,
1466 netdev
->trans_start
= jiffies
;
1469 /* Make sure there is space in the ring for the next send. */
1470 if(unlikely(IXGB_DESC_UNUSED(&adapter
->tx_ring
) < DESC_NEEDED
))
1471 netif_stop_queue(netdev
);
1473 spin_unlock_irqrestore(&adapter
->tx_lock
, flags
);
1476 return NETDEV_TX_OK
;
1480 * ixgb_tx_timeout - Respond to a Tx Hang
1481 * @netdev: network interface device structure
1485 ixgb_tx_timeout(struct net_device
*netdev
)
1487 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1489 /* Do the reset outside of interrupt context */
1490 schedule_work(&adapter
->tx_timeout_task
);
1494 ixgb_tx_timeout_task(struct net_device
*netdev
)
1496 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1498 adapter
->tx_timeout_count
++;
1499 ixgb_down(adapter
, TRUE
);
1504 * ixgb_get_stats - Get System Network Statistics
1505 * @netdev: network interface device structure
1507 * Returns the address of the device statistics structure.
1508 * The statistics are actually updated from the timer callback.
1511 static struct net_device_stats
*
1512 ixgb_get_stats(struct net_device
*netdev
)
1514 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1516 return &adapter
->net_stats
;
1520 * ixgb_change_mtu - Change the Maximum Transfer Unit
1521 * @netdev: network interface device structure
1522 * @new_mtu: new value for maximum frame size
1524 * Returns 0 on success, negative on failure
1528 ixgb_change_mtu(struct net_device
*netdev
, int new_mtu
)
1530 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1531 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1532 int old_max_frame
= netdev
->mtu
+ ENET_HEADER_SIZE
+ ENET_FCS_LENGTH
;
1535 if((max_frame
< IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS
+ ENET_FCS_LENGTH
)
1536 || (max_frame
> IXGB_MAX_JUMBO_FRAME_SIZE
+ ENET_FCS_LENGTH
)) {
1537 DPRINTK(PROBE
, ERR
, "Invalid MTU setting %d\n", new_mtu
);
1541 adapter
->rx_buffer_len
= max_frame
;
1543 netdev
->mtu
= new_mtu
;
1545 if ((old_max_frame
!= max_frame
) && netif_running(netdev
)) {
1546 ixgb_down(adapter
, TRUE
);
1554 * ixgb_update_stats - Update the board statistics counters.
1555 * @adapter: board private structure
1559 ixgb_update_stats(struct ixgb_adapter
*adapter
)
1561 struct net_device
*netdev
= adapter
->netdev
;
1563 if((netdev
->flags
& IFF_PROMISC
) || (netdev
->flags
& IFF_ALLMULTI
) ||
1564 (netdev
->mc_count
> IXGB_MAX_NUM_MULTICAST_ADDRESSES
)) {
1565 u64 multi
= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1566 u32 bcast_l
= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1567 u32 bcast_h
= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1568 u64 bcast
= ((u64
)bcast_h
<< 32) | bcast_l
;
1570 multi
|= ((u64
)IXGB_READ_REG(&adapter
->hw
, MPRCH
) << 32);
1571 /* fix up multicast stats by removing broadcasts */
1575 adapter
->stats
.mprcl
+= (multi
& 0xFFFFFFFF);
1576 adapter
->stats
.mprch
+= (multi
>> 32);
1577 adapter
->stats
.bprcl
+= bcast_l
;
1578 adapter
->stats
.bprch
+= bcast_h
;
1580 adapter
->stats
.mprcl
+= IXGB_READ_REG(&adapter
->hw
, MPRCL
);
1581 adapter
->stats
.mprch
+= IXGB_READ_REG(&adapter
->hw
, MPRCH
);
1582 adapter
->stats
.bprcl
+= IXGB_READ_REG(&adapter
->hw
, BPRCL
);
1583 adapter
->stats
.bprch
+= IXGB_READ_REG(&adapter
->hw
, BPRCH
);
1585 adapter
->stats
.tprl
+= IXGB_READ_REG(&adapter
->hw
, TPRL
);
1586 adapter
->stats
.tprh
+= IXGB_READ_REG(&adapter
->hw
, TPRH
);
1587 adapter
->stats
.gprcl
+= IXGB_READ_REG(&adapter
->hw
, GPRCL
);
1588 adapter
->stats
.gprch
+= IXGB_READ_REG(&adapter
->hw
, GPRCH
);
1589 adapter
->stats
.uprcl
+= IXGB_READ_REG(&adapter
->hw
, UPRCL
);
1590 adapter
->stats
.uprch
+= IXGB_READ_REG(&adapter
->hw
, UPRCH
);
1591 adapter
->stats
.vprcl
+= IXGB_READ_REG(&adapter
->hw
, VPRCL
);
1592 adapter
->stats
.vprch
+= IXGB_READ_REG(&adapter
->hw
, VPRCH
);
1593 adapter
->stats
.jprcl
+= IXGB_READ_REG(&adapter
->hw
, JPRCL
);
1594 adapter
->stats
.jprch
+= IXGB_READ_REG(&adapter
->hw
, JPRCH
);
1595 adapter
->stats
.gorcl
+= IXGB_READ_REG(&adapter
->hw
, GORCL
);
1596 adapter
->stats
.gorch
+= IXGB_READ_REG(&adapter
->hw
, GORCH
);
1597 adapter
->stats
.torl
+= IXGB_READ_REG(&adapter
->hw
, TORL
);
1598 adapter
->stats
.torh
+= IXGB_READ_REG(&adapter
->hw
, TORH
);
1599 adapter
->stats
.rnbc
+= IXGB_READ_REG(&adapter
->hw
, RNBC
);
1600 adapter
->stats
.ruc
+= IXGB_READ_REG(&adapter
->hw
, RUC
);
1601 adapter
->stats
.roc
+= IXGB_READ_REG(&adapter
->hw
, ROC
);
1602 adapter
->stats
.rlec
+= IXGB_READ_REG(&adapter
->hw
, RLEC
);
1603 adapter
->stats
.crcerrs
+= IXGB_READ_REG(&adapter
->hw
, CRCERRS
);
1604 adapter
->stats
.icbc
+= IXGB_READ_REG(&adapter
->hw
, ICBC
);
1605 adapter
->stats
.ecbc
+= IXGB_READ_REG(&adapter
->hw
, ECBC
);
1606 adapter
->stats
.mpc
+= IXGB_READ_REG(&adapter
->hw
, MPC
);
1607 adapter
->stats
.tptl
+= IXGB_READ_REG(&adapter
->hw
, TPTL
);
1608 adapter
->stats
.tpth
+= IXGB_READ_REG(&adapter
->hw
, TPTH
);
1609 adapter
->stats
.gptcl
+= IXGB_READ_REG(&adapter
->hw
, GPTCL
);
1610 adapter
->stats
.gptch
+= IXGB_READ_REG(&adapter
->hw
, GPTCH
);
1611 adapter
->stats
.bptcl
+= IXGB_READ_REG(&adapter
->hw
, BPTCL
);
1612 adapter
->stats
.bptch
+= IXGB_READ_REG(&adapter
->hw
, BPTCH
);
1613 adapter
->stats
.mptcl
+= IXGB_READ_REG(&adapter
->hw
, MPTCL
);
1614 adapter
->stats
.mptch
+= IXGB_READ_REG(&adapter
->hw
, MPTCH
);
1615 adapter
->stats
.uptcl
+= IXGB_READ_REG(&adapter
->hw
, UPTCL
);
1616 adapter
->stats
.uptch
+= IXGB_READ_REG(&adapter
->hw
, UPTCH
);
1617 adapter
->stats
.vptcl
+= IXGB_READ_REG(&adapter
->hw
, VPTCL
);
1618 adapter
->stats
.vptch
+= IXGB_READ_REG(&adapter
->hw
, VPTCH
);
1619 adapter
->stats
.jptcl
+= IXGB_READ_REG(&adapter
->hw
, JPTCL
);
1620 adapter
->stats
.jptch
+= IXGB_READ_REG(&adapter
->hw
, JPTCH
);
1621 adapter
->stats
.gotcl
+= IXGB_READ_REG(&adapter
->hw
, GOTCL
);
1622 adapter
->stats
.gotch
+= IXGB_READ_REG(&adapter
->hw
, GOTCH
);
1623 adapter
->stats
.totl
+= IXGB_READ_REG(&adapter
->hw
, TOTL
);
1624 adapter
->stats
.toth
+= IXGB_READ_REG(&adapter
->hw
, TOTH
);
1625 adapter
->stats
.dc
+= IXGB_READ_REG(&adapter
->hw
, DC
);
1626 adapter
->stats
.plt64c
+= IXGB_READ_REG(&adapter
->hw
, PLT64C
);
1627 adapter
->stats
.tsctc
+= IXGB_READ_REG(&adapter
->hw
, TSCTC
);
1628 adapter
->stats
.tsctfc
+= IXGB_READ_REG(&adapter
->hw
, TSCTFC
);
1629 adapter
->stats
.ibic
+= IXGB_READ_REG(&adapter
->hw
, IBIC
);
1630 adapter
->stats
.rfc
+= IXGB_READ_REG(&adapter
->hw
, RFC
);
1631 adapter
->stats
.lfc
+= IXGB_READ_REG(&adapter
->hw
, LFC
);
1632 adapter
->stats
.pfrc
+= IXGB_READ_REG(&adapter
->hw
, PFRC
);
1633 adapter
->stats
.pftc
+= IXGB_READ_REG(&adapter
->hw
, PFTC
);
1634 adapter
->stats
.mcfrc
+= IXGB_READ_REG(&adapter
->hw
, MCFRC
);
1635 adapter
->stats
.mcftc
+= IXGB_READ_REG(&adapter
->hw
, MCFTC
);
1636 adapter
->stats
.xonrxc
+= IXGB_READ_REG(&adapter
->hw
, XONRXC
);
1637 adapter
->stats
.xontxc
+= IXGB_READ_REG(&adapter
->hw
, XONTXC
);
1638 adapter
->stats
.xoffrxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFRXC
);
1639 adapter
->stats
.xofftxc
+= IXGB_READ_REG(&adapter
->hw
, XOFFTXC
);
1640 adapter
->stats
.rjc
+= IXGB_READ_REG(&adapter
->hw
, RJC
);
1642 /* Fill out the OS statistics structure */
1644 adapter
->net_stats
.rx_packets
= adapter
->stats
.gprcl
;
1645 adapter
->net_stats
.tx_packets
= adapter
->stats
.gptcl
;
1646 adapter
->net_stats
.rx_bytes
= adapter
->stats
.gorcl
;
1647 adapter
->net_stats
.tx_bytes
= adapter
->stats
.gotcl
;
1648 adapter
->net_stats
.multicast
= adapter
->stats
.mprcl
;
1649 adapter
->net_stats
.collisions
= 0;
1651 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1652 * with a length in the type/len field */
1653 adapter
->net_stats
.rx_errors
=
1654 /* adapter->stats.rnbc + */ adapter
->stats
.crcerrs
+
1655 adapter
->stats
.ruc
+
1656 adapter
->stats
.roc
/*+ adapter->stats.rlec */ +
1657 adapter
->stats
.icbc
+
1658 adapter
->stats
.ecbc
+ adapter
->stats
.mpc
;
1661 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1664 adapter
->net_stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
1665 adapter
->net_stats
.rx_fifo_errors
= adapter
->stats
.mpc
;
1666 adapter
->net_stats
.rx_missed_errors
= adapter
->stats
.mpc
;
1667 adapter
->net_stats
.rx_over_errors
= adapter
->stats
.mpc
;
1669 adapter
->net_stats
.tx_errors
= 0;
1670 adapter
->net_stats
.rx_frame_errors
= 0;
1671 adapter
->net_stats
.tx_aborted_errors
= 0;
1672 adapter
->net_stats
.tx_carrier_errors
= 0;
1673 adapter
->net_stats
.tx_fifo_errors
= 0;
1674 adapter
->net_stats
.tx_heartbeat_errors
= 0;
1675 adapter
->net_stats
.tx_window_errors
= 0;
1678 #define IXGB_MAX_INTR 10
1680 * ixgb_intr - Interrupt Handler
1681 * @irq: interrupt number
1682 * @data: pointer to a network interface device structure
1683 * @pt_regs: CPU registers structure
1687 ixgb_intr(int irq
, void *data
, struct pt_regs
*regs
)
1689 struct net_device
*netdev
= data
;
1690 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1691 struct ixgb_hw
*hw
= &adapter
->hw
;
1692 uint32_t icr
= IXGB_READ_REG(hw
, ICR
);
1693 #ifndef CONFIG_IXGB_NAPI
1698 return IRQ_NONE
; /* Not our interrupt */
1700 if(unlikely(icr
& (IXGB_INT_RXSEQ
| IXGB_INT_LSC
))) {
1701 mod_timer(&adapter
->watchdog_timer
, jiffies
);
1704 #ifdef CONFIG_IXGB_NAPI
1705 if(netif_rx_schedule_prep(netdev
)) {
1707 /* Disable interrupts and register for poll. The flush
1708 of the posted write is intentionally left out.
1711 atomic_inc(&adapter
->irq_sem
);
1712 IXGB_WRITE_REG(&adapter
->hw
, IMC
, ~0);
1713 __netif_rx_schedule(netdev
);
1716 /* yes, that is actually a & and it is meant to make sure that
1717 * every pass through this for loop checks both receive and
1718 * transmit queues for completed descriptors, intended to
1719 * avoid starvation issues and assist tx/rx fairness. */
1720 for(i
= 0; i
< IXGB_MAX_INTR
; i
++)
1721 if(!ixgb_clean_rx_irq(adapter
) &
1722 !ixgb_clean_tx_irq(adapter
))
1728 #ifdef CONFIG_IXGB_NAPI
1730 * ixgb_clean - NAPI Rx polling callback
1731 * @adapter: board private structure
1735 ixgb_clean(struct net_device
*netdev
, int *budget
)
1737 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
1738 int work_to_do
= min(*budget
, netdev
->quota
);
1742 tx_cleaned
= ixgb_clean_tx_irq(adapter
);
1743 ixgb_clean_rx_irq(adapter
, &work_done
, work_to_do
);
1745 *budget
-= work_done
;
1746 netdev
->quota
-= work_done
;
1748 /* if no Tx and not enough Rx work done, exit the polling mode */
1749 if((!tx_cleaned
&& (work_done
== 0)) || !netif_running(netdev
)) {
1750 netif_rx_complete(netdev
);
1751 ixgb_irq_enable(adapter
);
1760 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1761 * @adapter: board private structure
1765 ixgb_clean_tx_irq(struct ixgb_adapter
*adapter
)
1767 struct ixgb_desc_ring
*tx_ring
= &adapter
->tx_ring
;
1768 struct net_device
*netdev
= adapter
->netdev
;
1769 struct ixgb_tx_desc
*tx_desc
, *eop_desc
;
1770 struct ixgb_buffer
*buffer_info
;
1771 unsigned int i
, eop
;
1772 boolean_t cleaned
= FALSE
;
1774 i
= tx_ring
->next_to_clean
;
1775 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1776 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1778 while(eop_desc
->status
& IXGB_TX_DESC_STATUS_DD
) {
1780 for(cleaned
= FALSE
; !cleaned
; ) {
1781 tx_desc
= IXGB_TX_DESC(*tx_ring
, i
);
1782 buffer_info
= &tx_ring
->buffer_info
[i
];
1785 & (IXGB_TX_DESC_POPTS_TXSM
|
1786 IXGB_TX_DESC_POPTS_IXSM
))
1787 adapter
->hw_csum_tx_good
++;
1789 ixgb_unmap_and_free_tx_resource(adapter
, buffer_info
);
1791 *(uint32_t *)&(tx_desc
->status
) = 0;
1793 cleaned
= (i
== eop
);
1794 if(++i
== tx_ring
->count
) i
= 0;
1797 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
1798 eop_desc
= IXGB_TX_DESC(*tx_ring
, eop
);
1801 tx_ring
->next_to_clean
= i
;
1803 if (unlikely(netif_queue_stopped(netdev
))) {
1804 spin_lock(&adapter
->tx_lock
);
1805 if (netif_queue_stopped(netdev
) && netif_carrier_ok(netdev
) &&
1806 (IXGB_DESC_UNUSED(tx_ring
) > IXGB_TX_QUEUE_WAKE
))
1807 netif_wake_queue(netdev
);
1808 spin_unlock(&adapter
->tx_lock
);
1811 if(adapter
->detect_tx_hung
) {
1812 /* detect a transmit hang in hardware, this serializes the
1813 * check with the clearing of time_stamp and movement of i */
1814 adapter
->detect_tx_hung
= FALSE
;
1815 if (tx_ring
->buffer_info
[eop
].dma
&&
1816 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+ HZ
)
1817 && !(IXGB_READ_REG(&adapter
->hw
, STATUS
) &
1818 IXGB_STATUS_TXOFF
)) {
1819 /* detected Tx unit hang */
1820 DPRINTK(DRV
, ERR
, "Detected Tx Unit Hang\n"
1823 " next_to_use <%x>\n"
1824 " next_to_clean <%x>\n"
1825 "buffer_info[next_to_clean]\n"
1826 " time_stamp <%lx>\n"
1827 " next_to_watch <%x>\n"
1829 " next_to_watch.status <%x>\n",
1830 IXGB_READ_REG(&adapter
->hw
, TDH
),
1831 IXGB_READ_REG(&adapter
->hw
, TDT
),
1832 tx_ring
->next_to_use
,
1833 tx_ring
->next_to_clean
,
1834 tx_ring
->buffer_info
[eop
].time_stamp
,
1838 netif_stop_queue(netdev
);
1846 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1847 * @adapter: board private structure
1848 * @rx_desc: receive descriptor
1849 * @sk_buff: socket buffer with received data
1853 ixgb_rx_checksum(struct ixgb_adapter
*adapter
,
1854 struct ixgb_rx_desc
*rx_desc
,
1855 struct sk_buff
*skb
)
1857 /* Ignore Checksum bit is set OR
1858 * TCP Checksum has not been calculated
1860 if((rx_desc
->status
& IXGB_RX_DESC_STATUS_IXSM
) ||
1861 (!(rx_desc
->status
& IXGB_RX_DESC_STATUS_TCPCS
))) {
1862 skb
->ip_summed
= CHECKSUM_NONE
;
1866 /* At this point we know the hardware did the TCP checksum */
1867 /* now look at the TCP checksum error bit */
1868 if(rx_desc
->errors
& IXGB_RX_DESC_ERRORS_TCPE
) {
1869 /* let the stack verify checksum errors */
1870 skb
->ip_summed
= CHECKSUM_NONE
;
1871 adapter
->hw_csum_rx_error
++;
1873 /* TCP checksum is good */
1874 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1875 adapter
->hw_csum_rx_good
++;
1880 * ixgb_clean_rx_irq - Send received data up the network stack,
1881 * @adapter: board private structure
1885 #ifdef CONFIG_IXGB_NAPI
1886 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
, int *work_done
, int work_to_do
)
1888 ixgb_clean_rx_irq(struct ixgb_adapter
*adapter
)
1891 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
1892 struct net_device
*netdev
= adapter
->netdev
;
1893 struct pci_dev
*pdev
= adapter
->pdev
;
1894 struct ixgb_rx_desc
*rx_desc
, *next_rxd
;
1895 struct ixgb_buffer
*buffer_info
, *next_buffer
, *next2_buffer
;
1898 boolean_t cleaned
= FALSE
;
1900 i
= rx_ring
->next_to_clean
;
1901 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
1902 buffer_info
= &rx_ring
->buffer_info
[i
];
1904 while(rx_desc
->status
& IXGB_RX_DESC_STATUS_DD
) {
1905 struct sk_buff
*skb
, *next_skb
;
1908 #ifdef CONFIG_IXGB_NAPI
1909 if(*work_done
>= work_to_do
)
1914 status
= rx_desc
->status
;
1915 skb
= buffer_info
->skb
;
1916 buffer_info
->skb
= NULL
;
1918 prefetch(skb
->data
);
1920 if(++i
== rx_ring
->count
) i
= 0;
1921 next_rxd
= IXGB_RX_DESC(*rx_ring
, i
);
1924 if((j
= i
+ 1) == rx_ring
->count
) j
= 0;
1925 next2_buffer
= &rx_ring
->buffer_info
[j
];
1926 prefetch(next2_buffer
);
1928 next_buffer
= &rx_ring
->buffer_info
[i
];
1929 next_skb
= next_buffer
->skb
;
1934 pci_unmap_single(pdev
,
1936 buffer_info
->length
,
1937 PCI_DMA_FROMDEVICE
);
1939 length
= le16_to_cpu(rx_desc
->length
);
1941 if(unlikely(!(status
& IXGB_RX_DESC_STATUS_EOP
))) {
1943 /* All receives must fit into a single buffer */
1945 IXGB_DBG("Receive packet consumed multiple buffers "
1946 "length<%x>\n", length
);
1948 dev_kfree_skb_irq(skb
);
1952 if (unlikely(rx_desc
->errors
1953 & (IXGB_RX_DESC_ERRORS_CE
| IXGB_RX_DESC_ERRORS_SE
1954 | IXGB_RX_DESC_ERRORS_P
|
1955 IXGB_RX_DESC_ERRORS_RXE
))) {
1957 dev_kfree_skb_irq(skb
);
1961 /* code added for copybreak, this should improve
1962 * performance for small packets with large amounts
1963 * of reassembly being done in the stack */
1964 #define IXGB_CB_LENGTH 256
1965 if (length
< IXGB_CB_LENGTH
) {
1966 struct sk_buff
*new_skb
=
1967 dev_alloc_skb(length
+ NET_IP_ALIGN
);
1969 skb_reserve(new_skb
, NET_IP_ALIGN
);
1970 new_skb
->dev
= netdev
;
1971 memcpy(new_skb
->data
- NET_IP_ALIGN
,
1972 skb
->data
- NET_IP_ALIGN
,
1973 length
+ NET_IP_ALIGN
);
1974 /* save the skb in buffer_info as good */
1975 buffer_info
->skb
= skb
;
1979 /* end copybreak code */
1982 skb_put(skb
, length
);
1984 /* Receive Checksum Offload */
1985 ixgb_rx_checksum(adapter
, rx_desc
, skb
);
1987 skb
->protocol
= eth_type_trans(skb
, netdev
);
1988 #ifdef CONFIG_IXGB_NAPI
1989 if(adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
1990 vlan_hwaccel_receive_skb(skb
, adapter
->vlgrp
,
1991 le16_to_cpu(rx_desc
->special
) &
1992 IXGB_RX_DESC_SPECIAL_VLAN_MASK
);
1994 netif_receive_skb(skb
);
1996 #else /* CONFIG_IXGB_NAPI */
1997 if(adapter
->vlgrp
&& (status
& IXGB_RX_DESC_STATUS_VP
)) {
1998 vlan_hwaccel_rx(skb
, adapter
->vlgrp
,
1999 le16_to_cpu(rx_desc
->special
) &
2000 IXGB_RX_DESC_SPECIAL_VLAN_MASK
);
2004 #endif /* CONFIG_IXGB_NAPI */
2005 netdev
->last_rx
= jiffies
;
2008 /* clean up descriptor, might be written over by hw */
2009 rx_desc
->status
= 0;
2011 /* use prefetched values */
2013 buffer_info
= next_buffer
;
2016 rx_ring
->next_to_clean
= i
;
2018 ixgb_alloc_rx_buffers(adapter
);
2024 * ixgb_alloc_rx_buffers - Replace used receive buffers
2025 * @adapter: address of board private structure
2029 ixgb_alloc_rx_buffers(struct ixgb_adapter
*adapter
)
2031 struct ixgb_desc_ring
*rx_ring
= &adapter
->rx_ring
;
2032 struct net_device
*netdev
= adapter
->netdev
;
2033 struct pci_dev
*pdev
= adapter
->pdev
;
2034 struct ixgb_rx_desc
*rx_desc
;
2035 struct ixgb_buffer
*buffer_info
;
2036 struct sk_buff
*skb
;
2038 int num_group_tail_writes
;
2041 i
= rx_ring
->next_to_use
;
2042 buffer_info
= &rx_ring
->buffer_info
[i
];
2043 cleancount
= IXGB_DESC_UNUSED(rx_ring
);
2045 num_group_tail_writes
= IXGB_RX_BUFFER_WRITE
;
2047 /* leave three descriptors unused */
2048 while(--cleancount
> 2) {
2049 /* recycle! its good for you */
2050 if (!(skb
= buffer_info
->skb
))
2051 skb
= dev_alloc_skb(adapter
->rx_buffer_len
2058 if (unlikely(!skb
)) {
2059 /* Better luck next round */
2060 adapter
->alloc_rx_buff_failed
++;
2064 /* Make buffer alignment 2 beyond a 16 byte boundary
2065 * this will result in a 16 byte aligned IP header after
2066 * the 14 byte MAC header is removed
2068 skb_reserve(skb
, NET_IP_ALIGN
);
2072 buffer_info
->skb
= skb
;
2073 buffer_info
->length
= adapter
->rx_buffer_len
;
2075 buffer_info
->dma
= pci_map_single(pdev
,
2077 adapter
->rx_buffer_len
,
2078 PCI_DMA_FROMDEVICE
);
2080 rx_desc
= IXGB_RX_DESC(*rx_ring
, i
);
2081 rx_desc
->buff_addr
= cpu_to_le64(buffer_info
->dma
);
2082 /* guarantee DD bit not set now before h/w gets descriptor
2083 * this is the rest of the workaround for h/w double
2085 rx_desc
->status
= 0;
2088 if(++i
== rx_ring
->count
) i
= 0;
2089 buffer_info
= &rx_ring
->buffer_info
[i
];
2092 if (likely(rx_ring
->next_to_use
!= i
)) {
2093 rx_ring
->next_to_use
= i
;
2094 if (unlikely(i
-- == 0))
2095 i
= (rx_ring
->count
- 1);
2097 /* Force memory writes to complete before letting h/w
2098 * know there are new descriptors to fetch. (Only
2099 * applicable for weak-ordered memory model archs, such
2102 IXGB_WRITE_REG(&adapter
->hw
, RDT
, i
);
2107 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2109 * @param netdev network interface device structure
2110 * @param grp indicates to enable or disable tagging/stripping
2113 ixgb_vlan_rx_register(struct net_device
*netdev
, struct vlan_group
*grp
)
2115 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2116 uint32_t ctrl
, rctl
;
2118 ixgb_irq_disable(adapter
);
2119 adapter
->vlgrp
= grp
;
2122 /* enable VLAN tag insert/strip */
2123 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2124 ctrl
|= IXGB_CTRL0_VME
;
2125 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2127 /* enable VLAN receive filtering */
2129 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2130 rctl
|= IXGB_RCTL_VFE
;
2131 rctl
&= ~IXGB_RCTL_CFIEN
;
2132 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2134 /* disable VLAN tag insert/strip */
2136 ctrl
= IXGB_READ_REG(&adapter
->hw
, CTRL0
);
2137 ctrl
&= ~IXGB_CTRL0_VME
;
2138 IXGB_WRITE_REG(&adapter
->hw
, CTRL0
, ctrl
);
2140 /* disable VLAN filtering */
2142 rctl
= IXGB_READ_REG(&adapter
->hw
, RCTL
);
2143 rctl
&= ~IXGB_RCTL_VFE
;
2144 IXGB_WRITE_REG(&adapter
->hw
, RCTL
, rctl
);
2147 ixgb_irq_enable(adapter
);
2151 ixgb_vlan_rx_add_vid(struct net_device
*netdev
, uint16_t vid
)
2153 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2154 uint32_t vfta
, index
;
2156 /* add VID to filter table */
2158 index
= (vid
>> 5) & 0x7F;
2159 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2160 vfta
|= (1 << (vid
& 0x1F));
2161 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2165 ixgb_vlan_rx_kill_vid(struct net_device
*netdev
, uint16_t vid
)
2167 struct ixgb_adapter
*adapter
= netdev_priv(netdev
);
2168 uint32_t vfta
, index
;
2170 ixgb_irq_disable(adapter
);
2173 adapter
->vlgrp
->vlan_devices
[vid
] = NULL
;
2175 ixgb_irq_enable(adapter
);
2177 /* remove VID from filter table*/
2179 index
= (vid
>> 5) & 0x7F;
2180 vfta
= IXGB_READ_REG_ARRAY(&adapter
->hw
, VFTA
, index
);
2181 vfta
&= ~(1 << (vid
& 0x1F));
2182 ixgb_write_vfta(&adapter
->hw
, index
, vfta
);
2186 ixgb_restore_vlan(struct ixgb_adapter
*adapter
)
2188 ixgb_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
2190 if(adapter
->vlgrp
) {
2192 for(vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
2193 if(!adapter
->vlgrp
->vlan_devices
[vid
])
2195 ixgb_vlan_rx_add_vid(adapter
->netdev
, vid
);
2200 #ifdef CONFIG_NET_POLL_CONTROLLER
2202 * Polling 'interrupt' - used by things like netconsole to send skbs
2203 * without having to re-enable interrupts. It's not called while
2204 * the interrupt routine is executing.
2207 static void ixgb_netpoll(struct net_device
*dev
)
2209 struct ixgb_adapter
*adapter
= dev
->priv
;
2211 disable_irq(adapter
->pdev
->irq
);
2212 ixgb_intr(adapter
->pdev
->irq
, dev
, NULL
);
2213 enable_irq(adapter
->pdev
->irq
);