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 * - include fix to the condition that determines when to quit NAPI - Robert Olsson
34 * - use netif_poll_{disable/enable} to synchronize between NAPI and i/f up/down
36 * - reset buffer_info->dma in Tx resource cleanup logic
38 * - sparse cleanup - shemminger@osdl.org
39 * - fix tx resource cleanup logic
42 char ixgb_driver_name[] = "ixgb";
43 char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
45 #ifndef CONFIG_IXGB_NAPI
48 #define DRIVERNAPI "-NAPI"
51 #define DRV_VERSION "1.0.95-k2"DRIVERNAPI
52 char ixgb_driver_version[] = DRV_VERSION;
53 char ixgb_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";
55 /* ixgb_pci_tbl - PCI Device ID Table
57 * Wildcard entries (PCI_ANY_ID) should come last
58 * Last entry must be all 0s
60 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
61 * Class, Class Mask, private data (not used) }
63 static struct pci_device_id ixgb_pci_tbl[] = {
64 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
65 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
66 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
67 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
68 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR,
69 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
71 /* required last entry */
75 MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
77 /* Local Function Prototypes */
79 int ixgb_up(struct ixgb_adapter *adapter);
80 void ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog);
81 void ixgb_reset(struct ixgb_adapter *adapter);
82 int ixgb_setup_tx_resources(struct ixgb_adapter *adapter);
83 int ixgb_setup_rx_resources(struct ixgb_adapter *adapter);
84 void ixgb_free_tx_resources(struct ixgb_adapter *adapter);
85 void ixgb_free_rx_resources(struct ixgb_adapter *adapter);
86 void ixgb_update_stats(struct ixgb_adapter *adapter);
88 static int ixgb_init_module(void);
89 static void ixgb_exit_module(void);
90 static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
91 static void __devexit ixgb_remove(struct pci_dev *pdev);
92 static int ixgb_sw_init(struct ixgb_adapter *adapter);
93 static int ixgb_open(struct net_device *netdev);
94 static int ixgb_close(struct net_device *netdev);
95 static void ixgb_configure_tx(struct ixgb_adapter *adapter);
96 static void ixgb_configure_rx(struct ixgb_adapter *adapter);
97 static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
98 static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
99 static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
100 static void ixgb_set_multi(struct net_device *netdev);
101 static void ixgb_watchdog(unsigned long data);
102 static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
103 static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
104 static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
105 static int ixgb_set_mac(struct net_device *netdev, void *p);
106 static irqreturn_t ixgb_intr(int irq, void *data, struct pt_regs *regs);
107 static boolean_t ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
109 #ifdef CONFIG_IXGB_NAPI
110 static int ixgb_clean(struct net_device *netdev, int *budget);
111 static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter,
112 int *work_done, int work_to_do);
114 static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter);
116 static void ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter);
117 void ixgb_set_ethtool_ops(struct net_device *netdev);
118 static void ixgb_tx_timeout(struct net_device *dev);
119 static void ixgb_tx_timeout_task(struct net_device *dev);
120 static void ixgb_vlan_rx_register(struct net_device *netdev,
121 struct vlan_group *grp);
122 static void ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
123 static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
124 static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
126 #ifdef CONFIG_NET_POLL_CONTROLLER
127 /* for netdump / net console */
128 static void ixgb_netpoll(struct net_device *dev);
131 /* Exported from other modules */
133 extern void ixgb_check_options(struct ixgb_adapter *adapter);
135 static struct pci_driver ixgb_driver = {
136 .name = ixgb_driver_name,
137 .id_table = ixgb_pci_tbl,
139 .remove = __devexit_p(ixgb_remove),
142 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
143 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
144 MODULE_LICENSE("GPL");
145 MODULE_VERSION(DRV_VERSION);
147 /* some defines for controlling descriptor fetches in h/w */
148 #define RXDCTL_WTHRESH_DEFAULT 16 /* chip writes back at this many or RXT0 */
149 #define RXDCTL_PTHRESH_DEFAULT 0 /* chip considers prefech below
151 #define RXDCTL_HTHRESH_DEFAULT 0 /* chip will only prefetch if tail
152 * is pushed this many descriptors
156 * ixgb_init_module - Driver Registration Routine
158 * ixgb_init_module is the first routine called when the driver is
159 * loaded. All it does is register with the PCI subsystem.
163 ixgb_init_module(void)
165 printk(KERN_INFO "%s - version %s\n",
166 ixgb_driver_string, ixgb_driver_version);
168 printk(KERN_INFO "%s\n", ixgb_copyright);
170 return pci_module_init(&ixgb_driver);
173 module_init(ixgb_init_module);
176 * ixgb_exit_module - Driver Exit Cleanup Routine
178 * ixgb_exit_module is called just before the driver is removed
183 ixgb_exit_module(void)
185 pci_unregister_driver(&ixgb_driver);
188 module_exit(ixgb_exit_module);
191 * ixgb_irq_disable - Mask off interrupt generation on the NIC
192 * @adapter: board private structure
196 ixgb_irq_disable(struct ixgb_adapter *adapter)
198 atomic_inc(&adapter->irq_sem);
199 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
200 IXGB_WRITE_FLUSH(&adapter->hw);
201 synchronize_irq(adapter->pdev->irq);
205 * ixgb_irq_enable - Enable default interrupt generation settings
206 * @adapter: board private structure
210 ixgb_irq_enable(struct ixgb_adapter *adapter)
212 if(atomic_dec_and_test(&adapter->irq_sem)) {
213 IXGB_WRITE_REG(&adapter->hw, IMS,
214 IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | IXGB_INT_TXDW |
216 IXGB_WRITE_FLUSH(&adapter->hw);
221 ixgb_up(struct ixgb_adapter *adapter)
223 struct net_device *netdev = adapter->netdev;
225 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
226 struct ixgb_hw *hw = &adapter->hw;
228 /* hardware has been reset, we need to reload some things */
230 ixgb_set_multi(netdev);
232 ixgb_restore_vlan(adapter);
234 ixgb_configure_tx(adapter);
235 ixgb_setup_rctl(adapter);
236 ixgb_configure_rx(adapter);
237 ixgb_alloc_rx_buffers(adapter);
239 #ifdef CONFIG_PCI_MSI
241 boolean_t pcix = (IXGB_READ_REG(&adapter->hw, STATUS) &
242 IXGB_STATUS_PCIX_MODE) ? TRUE : FALSE;
243 adapter->have_msi = TRUE;
246 adapter->have_msi = FALSE;
247 else if((err = pci_enable_msi(adapter->pdev))) {
249 "Unable to allocate MSI interrupt Error: %d\n", err);
250 adapter->have_msi = FALSE;
251 /* proceed to try to request regular interrupt */
256 if((err = request_irq(adapter->pdev->irq, &ixgb_intr,
257 SA_SHIRQ | SA_SAMPLE_RANDOM,
258 netdev->name, netdev)))
261 /* disable interrupts and get the hardware into a known state */
262 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
264 if((hw->max_frame_size != max_frame) ||
265 (hw->max_frame_size !=
266 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
268 hw->max_frame_size = max_frame;
270 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
272 if(hw->max_frame_size >
273 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
274 uint32_t ctrl0 = IXGB_READ_REG(hw, CTRL0);
276 if(!(ctrl0 & IXGB_CTRL0_JFE)) {
277 ctrl0 |= IXGB_CTRL0_JFE;
278 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
283 mod_timer(&adapter->watchdog_timer, jiffies);
284 ixgb_irq_enable(adapter);
286 #ifdef CONFIG_IXGB_NAPI
287 netif_poll_enable(netdev);
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 IXGB_DBG("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))) {
359 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
360 IXGB_ERR("No usable DMA configuration, aborting\n");
366 if((err = pci_request_regions(pdev, ixgb_driver_name)))
369 pci_set_master(pdev);
371 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
374 goto err_alloc_etherdev;
377 SET_MODULE_OWNER(netdev);
378 SET_NETDEV_DEV(netdev, &pdev->dev);
380 pci_set_drvdata(pdev, netdev);
381 adapter = netdev_priv(netdev);
382 adapter->netdev = netdev;
383 adapter->pdev = pdev;
384 adapter->hw.back = adapter;
386 mmio_start = pci_resource_start(pdev, BAR_0);
387 mmio_len = pci_resource_len(pdev, BAR_0);
389 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
390 if(!adapter->hw.hw_addr) {
395 for(i = BAR_1; i <= BAR_5; i++) {
396 if(pci_resource_len(pdev, i) == 0)
398 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
399 adapter->hw.io_base = pci_resource_start(pdev, i);
404 netdev->open = &ixgb_open;
405 netdev->stop = &ixgb_close;
406 netdev->hard_start_xmit = &ixgb_xmit_frame;
407 netdev->get_stats = &ixgb_get_stats;
408 netdev->set_multicast_list = &ixgb_set_multi;
409 netdev->set_mac_address = &ixgb_set_mac;
410 netdev->change_mtu = &ixgb_change_mtu;
411 ixgb_set_ethtool_ops(netdev);
412 netdev->tx_timeout = &ixgb_tx_timeout;
413 netdev->watchdog_timeo = HZ;
414 #ifdef CONFIG_IXGB_NAPI
415 netdev->poll = &ixgb_clean;
418 netdev->vlan_rx_register = ixgb_vlan_rx_register;
419 netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
420 netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
421 #ifdef CONFIG_NET_POLL_CONTROLLER
422 netdev->poll_controller = ixgb_netpoll;
425 netdev->mem_start = mmio_start;
426 netdev->mem_end = mmio_start + mmio_len;
427 netdev->base_addr = adapter->hw.io_base;
429 adapter->bd_number = cards_found;
430 adapter->link_speed = 0;
431 adapter->link_duplex = 0;
433 /* setup the private structure */
435 if((err = ixgb_sw_init(adapter)))
438 netdev->features = NETIF_F_SG |
442 NETIF_F_HW_VLAN_FILTER;
444 netdev->features |= NETIF_F_TSO;
448 netdev->features |= NETIF_F_HIGHDMA;
450 /* make sure the EEPROM is good */
452 if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
453 printk(KERN_ERR "The EEPROM Checksum Is Not Valid\n");
458 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
460 if(!is_valid_ether_addr(netdev->dev_addr)) {
465 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
467 init_timer(&adapter->watchdog_timer);
468 adapter->watchdog_timer.function = &ixgb_watchdog;
469 adapter->watchdog_timer.data = (unsigned long)adapter;
471 INIT_WORK(&adapter->tx_timeout_task,
472 (void (*)(void *))ixgb_tx_timeout_task, netdev);
474 if((err = register_netdev(netdev)))
477 /* we're going to reset, so assume we have no link for now */
479 netif_carrier_off(netdev);
480 netif_stop_queue(netdev);
482 printk(KERN_INFO "%s: Intel(R) PRO/10GbE Network Connection\n",
484 ixgb_check_options(adapter);
485 /* reset the hardware with the new settings */
495 iounmap(adapter->hw.hw_addr);
499 pci_release_regions(pdev);
504 * ixgb_remove - Device Removal Routine
505 * @pdev: PCI device information struct
507 * ixgb_remove is called by the PCI subsystem to alert the driver
508 * that it should release a PCI device. The could be caused by a
509 * Hot-Plug event, or because the driver is going to be removed from
513 static void __devexit
514 ixgb_remove(struct pci_dev *pdev)
516 struct net_device *netdev = pci_get_drvdata(pdev);
517 struct ixgb_adapter *adapter = netdev_priv(netdev);
519 unregister_netdev(netdev);
521 iounmap(adapter->hw.hw_addr);
522 pci_release_regions(pdev);
528 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
529 * @adapter: board private structure to initialize
531 * ixgb_sw_init initializes the Adapter private data structure.
532 * Fields are initialized based on PCI device information and
533 * OS network device settings (MTU size).
537 ixgb_sw_init(struct ixgb_adapter *adapter)
539 struct ixgb_hw *hw = &adapter->hw;
540 struct net_device *netdev = adapter->netdev;
541 struct pci_dev *pdev = adapter->pdev;
543 /* PCI config space info */
545 hw->vendor_id = pdev->vendor;
546 hw->device_id = pdev->device;
547 hw->subsystem_vendor_id = pdev->subsystem_vendor;
548 hw->subsystem_id = pdev->subsystem_device;
550 adapter->rx_buffer_len = IXGB_RXBUFFER_2048;
552 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
554 if((hw->device_id == IXGB_DEVICE_ID_82597EX)
555 ||(hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
556 ||(hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
557 hw->mac_type = ixgb_82597;
559 /* should never have loaded on this device */
560 printk(KERN_ERR "ixgb: unsupported device id\n");
563 /* enable flow control to be programmed */
566 atomic_set(&adapter->irq_sem, 1);
567 spin_lock_init(&adapter->tx_lock);
573 * ixgb_open - Called when a network interface is made active
574 * @netdev: network interface device structure
576 * Returns 0 on success, negative value on failure
578 * The open entry point is called when a network interface is made
579 * active by the system (IFF_UP). At this point all resources needed
580 * for transmit and receive operations are allocated, the interrupt
581 * handler is registered with the OS, the watchdog timer is started,
582 * and the stack is notified that the interface is ready.
586 ixgb_open(struct net_device *netdev)
588 struct ixgb_adapter *adapter = netdev_priv(netdev);
591 /* allocate transmit descriptors */
593 if((err = ixgb_setup_tx_resources(adapter)))
596 /* allocate receive descriptors */
598 if((err = ixgb_setup_rx_resources(adapter)))
601 if((err = ixgb_up(adapter)))
607 ixgb_free_rx_resources(adapter);
609 ixgb_free_tx_resources(adapter);
617 * ixgb_close - Disables a network interface
618 * @netdev: network interface device structure
620 * Returns 0, this is not allowed to fail
622 * The close entry point is called when an interface is de-activated
623 * by the OS. The hardware is still under the drivers control, but
624 * needs to be disabled. A global MAC reset is issued to stop the
625 * hardware, and all transmit and receive resources are freed.
629 ixgb_close(struct net_device *netdev)
631 struct ixgb_adapter *adapter = netdev_priv(netdev);
633 ixgb_down(adapter, TRUE);
635 ixgb_free_tx_resources(adapter);
636 ixgb_free_rx_resources(adapter);
642 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
643 * @adapter: board private structure
645 * Return 0 on success, negative on failure
649 ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
651 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
652 struct pci_dev *pdev = adapter->pdev;
655 size = sizeof(struct ixgb_buffer) * txdr->count;
656 txdr->buffer_info = vmalloc(size);
657 if(!txdr->buffer_info) {
660 memset(txdr->buffer_info, 0, size);
662 /* round up to nearest 4K */
664 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
665 IXGB_ROUNDUP(txdr->size, 4096);
667 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
669 vfree(txdr->buffer_info);
672 memset(txdr->desc, 0, txdr->size);
674 txdr->next_to_use = 0;
675 txdr->next_to_clean = 0;
681 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
682 * @adapter: board private structure
684 * Configure the Tx unit of the MAC after a reset.
688 ixgb_configure_tx(struct ixgb_adapter *adapter)
690 uint64_t tdba = adapter->tx_ring.dma;
691 uint32_t tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
693 struct ixgb_hw *hw = &adapter->hw;
695 /* Setup the Base and Length of the Tx Descriptor Ring
696 * tx_ring.dma can be either a 32 or 64 bit value
699 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
700 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
702 IXGB_WRITE_REG(hw, TDLEN, tdlen);
704 /* Setup the HW Tx Head and Tail descriptor pointers */
706 IXGB_WRITE_REG(hw, TDH, 0);
707 IXGB_WRITE_REG(hw, TDT, 0);
709 /* don't set up txdctl, it induces performance problems if configured
711 /* Set the Tx Interrupt Delay register */
713 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
715 /* Program the Transmit Control Register */
717 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
718 IXGB_WRITE_REG(hw, TCTL, tctl);
720 /* Setup Transmit Descriptor Settings for this adapter */
721 adapter->tx_cmd_type =
723 | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
727 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
728 * @adapter: board private structure
730 * Returns 0 on success, negative on failure
734 ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
736 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
737 struct pci_dev *pdev = adapter->pdev;
740 size = sizeof(struct ixgb_buffer) * rxdr->count;
741 rxdr->buffer_info = vmalloc(size);
742 if(!rxdr->buffer_info) {
745 memset(rxdr->buffer_info, 0, size);
747 /* Round up to nearest 4K */
749 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
750 IXGB_ROUNDUP(rxdr->size, 4096);
752 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
755 vfree(rxdr->buffer_info);
758 memset(rxdr->desc, 0, rxdr->size);
760 rxdr->next_to_clean = 0;
761 rxdr->next_to_use = 0;
767 * ixgb_setup_rctl - configure the receive control register
768 * @adapter: Board private structure
772 ixgb_setup_rctl(struct ixgb_adapter *adapter)
776 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
778 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
781 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
782 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
783 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
785 rctl |= IXGB_RCTL_SECRC;
787 switch (adapter->rx_buffer_len) {
788 case IXGB_RXBUFFER_2048:
790 rctl |= IXGB_RCTL_BSIZE_2048;
792 case IXGB_RXBUFFER_4096:
793 rctl |= IXGB_RCTL_BSIZE_4096;
795 case IXGB_RXBUFFER_8192:
796 rctl |= IXGB_RCTL_BSIZE_8192;
798 case IXGB_RXBUFFER_16384:
799 rctl |= IXGB_RCTL_BSIZE_16384;
803 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
807 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
808 * @adapter: board private structure
810 * Configure the Rx unit of the MAC after a reset.
814 ixgb_configure_rx(struct ixgb_adapter *adapter)
816 uint64_t rdba = adapter->rx_ring.dma;
817 uint32_t rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
818 struct ixgb_hw *hw = &adapter->hw;
823 /* make sure receives are disabled while setting up the descriptors */
825 rctl = IXGB_READ_REG(hw, RCTL);
826 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
828 /* set the Receive Delay Timer Register */
830 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
832 /* Setup the Base and Length of the Rx Descriptor Ring */
834 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
835 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
837 IXGB_WRITE_REG(hw, RDLEN, rdlen);
839 /* Setup the HW Rx Head and Tail Descriptor Pointers */
840 IXGB_WRITE_REG(hw, RDH, 0);
841 IXGB_WRITE_REG(hw, RDT, 0);
843 /* set up pre-fetching of receive buffers so we get some before we
844 * run out (default hardware behavior is to run out before fetching
845 * more). This sets up to fetch if HTHRESH rx descriptors are avail
846 * and the descriptors in hw cache are below PTHRESH. This avoids
847 * the hardware behavior of fetching <=512 descriptors in a single
848 * burst that pre-empts all other activity, usually causing fifo
850 /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
851 rxdctl = RXDCTL_WTHRESH_DEFAULT << IXGB_RXDCTL_WTHRESH_SHIFT |
852 RXDCTL_HTHRESH_DEFAULT << IXGB_RXDCTL_HTHRESH_SHIFT |
853 RXDCTL_PTHRESH_DEFAULT << IXGB_RXDCTL_PTHRESH_SHIFT;
854 IXGB_WRITE_REG(hw, RXDCTL, rxdctl);
856 /* Enable Receive Checksum Offload for TCP and UDP */
857 if(adapter->rx_csum == TRUE) {
858 rxcsum = IXGB_READ_REG(hw, RXCSUM);
859 rxcsum |= IXGB_RXCSUM_TUOFL;
860 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
863 /* Enable Receives */
865 IXGB_WRITE_REG(hw, RCTL, rctl);
869 * ixgb_free_tx_resources - Free Tx Resources
870 * @adapter: board private structure
872 * Free all transmit software resources
876 ixgb_free_tx_resources(struct ixgb_adapter *adapter)
878 struct pci_dev *pdev = adapter->pdev;
880 ixgb_clean_tx_ring(adapter);
882 vfree(adapter->tx_ring.buffer_info);
883 adapter->tx_ring.buffer_info = NULL;
885 pci_free_consistent(pdev, adapter->tx_ring.size,
886 adapter->tx_ring.desc, adapter->tx_ring.dma);
888 adapter->tx_ring.desc = NULL;
892 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
893 struct ixgb_buffer *buffer_info)
895 struct pci_dev *pdev = adapter->pdev;
896 if(buffer_info->dma) {
901 buffer_info->dma = 0;
903 if(buffer_info->skb) {
904 dev_kfree_skb_any(buffer_info->skb);
905 buffer_info->skb = NULL;
910 * ixgb_clean_tx_ring - Free Tx Buffers
911 * @adapter: board private structure
915 ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
917 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
918 struct ixgb_buffer *buffer_info;
922 /* Free all the Tx ring sk_buffs */
924 for(i = 0; i < tx_ring->count; i++) {
925 buffer_info = &tx_ring->buffer_info[i];
926 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
929 size = sizeof(struct ixgb_buffer) * tx_ring->count;
930 memset(tx_ring->buffer_info, 0, size);
932 /* Zero out the descriptor ring */
934 memset(tx_ring->desc, 0, tx_ring->size);
936 tx_ring->next_to_use = 0;
937 tx_ring->next_to_clean = 0;
939 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
940 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
944 * ixgb_free_rx_resources - Free Rx Resources
945 * @adapter: board private structure
947 * Free all receive software resources
951 ixgb_free_rx_resources(struct ixgb_adapter *adapter)
953 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
954 struct pci_dev *pdev = adapter->pdev;
956 ixgb_clean_rx_ring(adapter);
958 vfree(rx_ring->buffer_info);
959 rx_ring->buffer_info = NULL;
961 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
963 rx_ring->desc = NULL;
967 * ixgb_clean_rx_ring - Free Rx Buffers
968 * @adapter: board private structure
972 ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
974 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
975 struct ixgb_buffer *buffer_info;
976 struct pci_dev *pdev = adapter->pdev;
980 /* Free all the Rx ring sk_buffs */
982 for(i = 0; i < rx_ring->count; i++) {
983 buffer_info = &rx_ring->buffer_info[i];
984 if(buffer_info->skb) {
986 pci_unmap_single(pdev,
991 dev_kfree_skb(buffer_info->skb);
993 buffer_info->skb = NULL;
997 size = sizeof(struct ixgb_buffer) * rx_ring->count;
998 memset(rx_ring->buffer_info, 0, size);
1000 /* Zero out the descriptor ring */
1002 memset(rx_ring->desc, 0, rx_ring->size);
1004 rx_ring->next_to_clean = 0;
1005 rx_ring->next_to_use = 0;
1007 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1008 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1012 * ixgb_set_mac - Change the Ethernet Address of the NIC
1013 * @netdev: network interface device structure
1014 * @p: pointer to an address structure
1016 * Returns 0 on success, negative on failure
1020 ixgb_set_mac(struct net_device *netdev, void *p)
1022 struct ixgb_adapter *adapter = netdev_priv(netdev);
1023 struct sockaddr *addr = p;
1025 if(!is_valid_ether_addr(addr->sa_data))
1026 return -EADDRNOTAVAIL;
1028 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1030 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1036 * ixgb_set_multi - Multicast and Promiscuous mode set
1037 * @netdev: network interface device structure
1039 * The set_multi entry point is called whenever the multicast address
1040 * list or the network interface flags are updated. This routine is
1041 * responsible for configuring the hardware for proper multicast,
1042 * promiscuous mode, and all-multi behavior.
1046 ixgb_set_multi(struct net_device *netdev)
1048 struct ixgb_adapter *adapter = netdev_priv(netdev);
1049 struct ixgb_hw *hw = &adapter->hw;
1050 struct dev_mc_list *mc_ptr;
1054 /* Check for Promiscuous and All Multicast modes */
1056 rctl = IXGB_READ_REG(hw, RCTL);
1058 if(netdev->flags & IFF_PROMISC) {
1059 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1060 } else if(netdev->flags & IFF_ALLMULTI) {
1061 rctl |= IXGB_RCTL_MPE;
1062 rctl &= ~IXGB_RCTL_UPE;
1064 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1067 if(netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1068 rctl |= IXGB_RCTL_MPE;
1069 IXGB_WRITE_REG(hw, RCTL, rctl);
1071 uint8_t mta[netdev->mc_count * IXGB_ETH_LENGTH_OF_ADDRESS];
1073 IXGB_WRITE_REG(hw, RCTL, rctl);
1075 for(i = 0, mc_ptr = netdev->mc_list; mc_ptr;
1076 i++, mc_ptr = mc_ptr->next)
1077 memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
1078 mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1080 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1085 * ixgb_watchdog - Timer Call-back
1086 * @data: pointer to netdev cast into an unsigned long
1090 ixgb_watchdog(unsigned long data)
1092 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1093 struct net_device *netdev = adapter->netdev;
1094 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1096 ixgb_check_for_link(&adapter->hw);
1098 if (ixgb_check_for_bad_link(&adapter->hw)) {
1099 /* force the reset path */
1100 netif_stop_queue(netdev);
1103 if(adapter->hw.link_up) {
1104 if(!netif_carrier_ok(netdev)) {
1105 printk(KERN_INFO "ixgb: %s NIC Link is Up %d Mbps %s\n",
1106 netdev->name, 10000, "Full Duplex");
1107 adapter->link_speed = 10000;
1108 adapter->link_duplex = FULL_DUPLEX;
1109 netif_carrier_on(netdev);
1110 netif_wake_queue(netdev);
1113 if(netif_carrier_ok(netdev)) {
1114 adapter->link_speed = 0;
1115 adapter->link_duplex = 0;
1117 "ixgb: %s NIC Link is Down\n",
1119 netif_carrier_off(netdev);
1120 netif_stop_queue(netdev);
1125 ixgb_update_stats(adapter);
1127 if(!netif_carrier_ok(netdev)) {
1128 if(IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1129 /* We've lost link, so the controller stops DMA,
1130 * but we've got queued Tx work that's never going
1131 * to get done, so reset controller to flush Tx.
1132 * (Do the reset outside of interrupt context). */
1133 schedule_work(&adapter->tx_timeout_task);
1137 /* Force detection of hung controller every watchdog period */
1138 adapter->detect_tx_hung = TRUE;
1140 /* generate an interrupt to force clean up of any stragglers */
1141 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1143 /* Reset the timer */
1144 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1147 #define IXGB_TX_FLAGS_CSUM 0x00000001
1148 #define IXGB_TX_FLAGS_VLAN 0x00000002
1149 #define IXGB_TX_FLAGS_TSO 0x00000004
1152 ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1155 struct ixgb_context_desc *context_desc;
1157 uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
1158 uint16_t ipcse, tucse, mss;
1161 if(likely(skb_shinfo(skb)->tso_size)) {
1162 if (skb_header_cloned(skb)) {
1163 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1168 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
1169 mss = skb_shinfo(skb)->tso_size;
1170 skb->nh.iph->tot_len = 0;
1171 skb->nh.iph->check = 0;
1172 skb->h.th->check = ~csum_tcpudp_magic(skb->nh.iph->saddr,
1175 ipcss = skb->nh.raw - skb->data;
1176 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
1177 ipcse = skb->h.raw - skb->data - 1;
1178 tucss = skb->h.raw - skb->data;
1179 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
1182 i = adapter->tx_ring.next_to_use;
1183 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1185 context_desc->ipcss = ipcss;
1186 context_desc->ipcso = ipcso;
1187 context_desc->ipcse = cpu_to_le16(ipcse);
1188 context_desc->tucss = tucss;
1189 context_desc->tucso = tucso;
1190 context_desc->tucse = cpu_to_le16(tucse);
1191 context_desc->mss = cpu_to_le16(mss);
1192 context_desc->hdr_len = hdr_len;
1193 context_desc->status = 0;
1194 context_desc->cmd_type_len = cpu_to_le32(
1195 IXGB_CONTEXT_DESC_TYPE
1196 | IXGB_CONTEXT_DESC_CMD_TSE
1197 | IXGB_CONTEXT_DESC_CMD_IP
1198 | IXGB_CONTEXT_DESC_CMD_TCP
1199 | IXGB_CONTEXT_DESC_CMD_IDE
1200 | (skb->len - (hdr_len)));
1203 if(++i == adapter->tx_ring.count) i = 0;
1204 adapter->tx_ring.next_to_use = i;
1213 static inline boolean_t
1214 ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1216 struct ixgb_context_desc *context_desc;
1220 if(likely(skb->ip_summed == CHECKSUM_HW)) {
1221 css = skb->h.raw - skb->data;
1222 cso = (skb->h.raw + skb->csum) - skb->data;
1224 i = adapter->tx_ring.next_to_use;
1225 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1227 context_desc->tucss = css;
1228 context_desc->tucso = cso;
1229 context_desc->tucse = 0;
1230 /* zero out any previously existing data in one instruction */
1231 *(uint32_t *)&(context_desc->ipcss) = 0;
1232 context_desc->status = 0;
1233 context_desc->hdr_len = 0;
1234 context_desc->mss = 0;
1235 context_desc->cmd_type_len =
1236 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1237 | IXGB_TX_DESC_CMD_IDE);
1239 if(++i == adapter->tx_ring.count) i = 0;
1240 adapter->tx_ring.next_to_use = i;
1248 #define IXGB_MAX_TXD_PWR 14
1249 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1252 ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1255 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1256 struct ixgb_buffer *buffer_info;
1258 unsigned int offset = 0, size, count = 0, i;
1260 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1263 len -= skb->data_len;
1265 i = tx_ring->next_to_use;
1268 buffer_info = &tx_ring->buffer_info[i];
1269 size = min(len, IXGB_MAX_JUMBO_FRAME_SIZE);
1270 buffer_info->length = size;
1272 pci_map_single(adapter->pdev,
1276 buffer_info->time_stamp = jiffies;
1281 if(++i == tx_ring->count) i = 0;
1284 for(f = 0; f < nr_frags; f++) {
1285 struct skb_frag_struct *frag;
1287 frag = &skb_shinfo(skb)->frags[f];
1292 buffer_info = &tx_ring->buffer_info[i];
1293 size = min(len, IXGB_MAX_JUMBO_FRAME_SIZE);
1294 buffer_info->length = size;
1296 pci_map_page(adapter->pdev,
1298 frag->page_offset + offset,
1301 buffer_info->time_stamp = jiffies;
1306 if(++i == tx_ring->count) i = 0;
1309 i = (i == 0) ? tx_ring->count - 1 : i - 1;
1310 tx_ring->buffer_info[i].skb = skb;
1311 tx_ring->buffer_info[first].next_to_watch = i;
1317 ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1319 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1320 struct ixgb_tx_desc *tx_desc = NULL;
1321 struct ixgb_buffer *buffer_info;
1322 uint32_t cmd_type_len = adapter->tx_cmd_type;
1327 if(tx_flags & IXGB_TX_FLAGS_TSO) {
1328 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1329 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1332 if(tx_flags & IXGB_TX_FLAGS_CSUM)
1333 popts |= IXGB_TX_DESC_POPTS_TXSM;
1335 if(tx_flags & IXGB_TX_FLAGS_VLAN) {
1336 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1339 i = tx_ring->next_to_use;
1342 buffer_info = &tx_ring->buffer_info[i];
1343 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1344 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1345 tx_desc->cmd_type_len =
1346 cpu_to_le32(cmd_type_len | buffer_info->length);
1347 tx_desc->status = status;
1348 tx_desc->popts = popts;
1349 tx_desc->vlan = cpu_to_le16(vlan_id);
1351 if(++i == tx_ring->count) i = 0;
1354 tx_desc->cmd_type_len |= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1355 | IXGB_TX_DESC_CMD_RS );
1357 /* Force memory writes to complete before letting h/w
1358 * know there are new descriptors to fetch. (Only
1359 * applicable for weak-ordered memory model archs,
1360 * such as IA-64). */
1363 tx_ring->next_to_use = i;
1364 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1367 /* Tx Descriptors needed, worst case */
1368 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1369 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1370 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) + \
1371 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1
1374 ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1376 struct ixgb_adapter *adapter = netdev_priv(netdev);
1378 unsigned int tx_flags = 0;
1379 unsigned long flags;
1384 dev_kfree_skb_any(skb);
1388 spin_lock_irqsave(&adapter->tx_lock, flags);
1389 if(unlikely(IXGB_DESC_UNUSED(&adapter->tx_ring) < DESC_NEEDED)) {
1390 netif_stop_queue(netdev);
1391 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1394 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1396 if(adapter->vlgrp && vlan_tx_tag_present(skb)) {
1397 tx_flags |= IXGB_TX_FLAGS_VLAN;
1398 vlan_id = vlan_tx_tag_get(skb);
1401 first = adapter->tx_ring.next_to_use;
1403 tso = ixgb_tso(adapter, skb);
1405 dev_kfree_skb_any(skb);
1406 return NETDEV_TX_OK;
1410 tx_flags |= IXGB_TX_FLAGS_TSO;
1411 else if(ixgb_tx_csum(adapter, skb))
1412 tx_flags |= IXGB_TX_FLAGS_CSUM;
1414 ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
1417 netdev->trans_start = jiffies;
1423 * ixgb_tx_timeout - Respond to a Tx Hang
1424 * @netdev: network interface device structure
1428 ixgb_tx_timeout(struct net_device *netdev)
1430 struct ixgb_adapter *adapter = netdev_priv(netdev);
1432 /* Do the reset outside of interrupt context */
1433 schedule_work(&adapter->tx_timeout_task);
1437 ixgb_tx_timeout_task(struct net_device *netdev)
1439 struct ixgb_adapter *adapter = netdev_priv(netdev);
1441 ixgb_down(adapter, TRUE);
1446 * ixgb_get_stats - Get System Network Statistics
1447 * @netdev: network interface device structure
1449 * Returns the address of the device statistics structure.
1450 * The statistics are actually updated from the timer callback.
1453 static struct net_device_stats *
1454 ixgb_get_stats(struct net_device *netdev)
1456 struct ixgb_adapter *adapter = netdev_priv(netdev);
1458 return &adapter->net_stats;
1462 * ixgb_change_mtu - Change the Maximum Transfer Unit
1463 * @netdev: network interface device structure
1464 * @new_mtu: new value for maximum frame size
1466 * Returns 0 on success, negative on failure
1470 ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1472 struct ixgb_adapter *adapter = netdev_priv(netdev);
1473 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1474 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1477 if((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
1478 || (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
1479 IXGB_ERR("Invalid MTU setting\n");
1483 if((max_frame <= IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
1484 || (max_frame <= IXGB_RXBUFFER_2048)) {
1485 adapter->rx_buffer_len = IXGB_RXBUFFER_2048;
1487 } else if(max_frame <= IXGB_RXBUFFER_4096) {
1488 adapter->rx_buffer_len = IXGB_RXBUFFER_4096;
1490 } else if(max_frame <= IXGB_RXBUFFER_8192) {
1491 adapter->rx_buffer_len = IXGB_RXBUFFER_8192;
1494 adapter->rx_buffer_len = IXGB_RXBUFFER_16384;
1497 netdev->mtu = new_mtu;
1499 if(old_max_frame != max_frame && netif_running(netdev)) {
1501 ixgb_down(adapter, TRUE);
1509 * ixgb_update_stats - Update the board statistics counters.
1510 * @adapter: board private structure
1514 ixgb_update_stats(struct ixgb_adapter *adapter)
1516 struct net_device *netdev = adapter->netdev;
1518 if((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
1519 (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1520 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1521 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1522 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
1523 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
1525 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1526 /* fix up multicast stats by removing broadcasts */
1529 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1530 adapter->stats.mprch += (multi >> 32);
1531 adapter->stats.bprcl += bcast_l;
1532 adapter->stats.bprch += bcast_h;
1534 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1535 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1536 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1537 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1539 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1540 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1541 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1542 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1543 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1544 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1545 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1546 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1547 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1548 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1549 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1550 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1551 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1552 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1553 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1554 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1555 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1556 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1557 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1558 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1559 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1560 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1561 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1562 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1563 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1564 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1565 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1566 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1567 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1568 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1569 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1570 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1571 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1572 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1573 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1574 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1575 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1576 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1577 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1578 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1579 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1580 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1581 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1582 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1583 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1584 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1585 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1586 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1587 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1588 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1589 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1590 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1591 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1592 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1593 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1594 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1596 /* Fill out the OS statistics structure */
1598 adapter->net_stats.rx_packets = adapter->stats.gprcl;
1599 adapter->net_stats.tx_packets = adapter->stats.gptcl;
1600 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1601 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1602 adapter->net_stats.multicast = adapter->stats.mprcl;
1603 adapter->net_stats.collisions = 0;
1605 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1606 * with a length in the type/len field */
1607 adapter->net_stats.rx_errors =
1608 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1609 adapter->stats.ruc +
1610 adapter->stats.roc /*+ adapter->stats.rlec */ +
1611 adapter->stats.icbc +
1612 adapter->stats.ecbc + adapter->stats.mpc;
1614 adapter->net_stats.rx_dropped = adapter->stats.mpc;
1617 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1620 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1621 adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1622 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1623 adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1625 adapter->net_stats.tx_errors = 0;
1626 adapter->net_stats.rx_frame_errors = 0;
1627 adapter->net_stats.tx_aborted_errors = 0;
1628 adapter->net_stats.tx_carrier_errors = 0;
1629 adapter->net_stats.tx_fifo_errors = 0;
1630 adapter->net_stats.tx_heartbeat_errors = 0;
1631 adapter->net_stats.tx_window_errors = 0;
1634 #define IXGB_MAX_INTR 10
1636 * ixgb_intr - Interrupt Handler
1637 * @irq: interrupt number
1638 * @data: pointer to a network interface device structure
1639 * @pt_regs: CPU registers structure
1643 ixgb_intr(int irq, void *data, struct pt_regs *regs)
1645 struct net_device *netdev = data;
1646 struct ixgb_adapter *adapter = netdev_priv(netdev);
1647 struct ixgb_hw *hw = &adapter->hw;
1648 uint32_t icr = IXGB_READ_REG(hw, ICR);
1649 #ifndef CONFIG_IXGB_NAPI
1654 return IRQ_NONE; /* Not our interrupt */
1656 if(unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) {
1657 mod_timer(&adapter->watchdog_timer, jiffies);
1660 #ifdef CONFIG_IXGB_NAPI
1661 if(netif_rx_schedule_prep(netdev)) {
1663 /* Disable interrupts and register for poll. The flush
1664 of the posted write is intentionally left out.
1667 atomic_inc(&adapter->irq_sem);
1668 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
1669 __netif_rx_schedule(netdev);
1672 /* yes, that is actually a & and it is meant to make sure that
1673 * every pass through this for loop checks both receive and
1674 * transmit queues for completed descriptors, intended to
1675 * avoid starvation issues and assist tx/rx fairness. */
1676 for(i = 0; i < IXGB_MAX_INTR; i++)
1677 if(!ixgb_clean_rx_irq(adapter) &
1678 !ixgb_clean_tx_irq(adapter))
1684 #ifdef CONFIG_IXGB_NAPI
1686 * ixgb_clean - NAPI Rx polling callback
1687 * @adapter: board private structure
1691 ixgb_clean(struct net_device *netdev, int *budget)
1693 struct ixgb_adapter *adapter = netdev_priv(netdev);
1694 int work_to_do = min(*budget, netdev->quota);
1698 tx_cleaned = ixgb_clean_tx_irq(adapter);
1699 ixgb_clean_rx_irq(adapter, &work_done, work_to_do);
1701 *budget -= work_done;
1702 netdev->quota -= work_done;
1704 /* if no Tx and not enough Rx work done, exit the polling mode */
1705 if((!tx_cleaned && (work_done == 0)) || !netif_running(netdev)) {
1706 netif_rx_complete(netdev);
1707 ixgb_irq_enable(adapter);
1716 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1717 * @adapter: board private structure
1721 ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1723 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1724 struct net_device *netdev = adapter->netdev;
1725 struct ixgb_tx_desc *tx_desc, *eop_desc;
1726 struct ixgb_buffer *buffer_info;
1727 unsigned int i, eop;
1728 boolean_t cleaned = FALSE;
1730 i = tx_ring->next_to_clean;
1731 eop = tx_ring->buffer_info[i].next_to_watch;
1732 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1734 while(eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1736 for(cleaned = FALSE; !cleaned; ) {
1737 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1738 buffer_info = &tx_ring->buffer_info[i];
1741 & (IXGB_TX_DESC_POPTS_TXSM |
1742 IXGB_TX_DESC_POPTS_IXSM))
1743 adapter->hw_csum_tx_good++;
1745 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1747 *(uint32_t *)&(tx_desc->status) = 0;
1749 cleaned = (i == eop);
1750 if(++i == tx_ring->count) i = 0;
1753 eop = tx_ring->buffer_info[i].next_to_watch;
1754 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1757 tx_ring->next_to_clean = i;
1759 spin_lock(&adapter->tx_lock);
1760 if(cleaned && netif_queue_stopped(netdev) && netif_carrier_ok(netdev) &&
1761 (IXGB_DESC_UNUSED(tx_ring) > IXGB_TX_QUEUE_WAKE)) {
1763 netif_wake_queue(netdev);
1765 spin_unlock(&adapter->tx_lock);
1767 if(adapter->detect_tx_hung) {
1768 /* detect a transmit hang in hardware, this serializes the
1769 * check with the clearing of time_stamp and movement of i */
1770 adapter->detect_tx_hung = FALSE;
1771 if(tx_ring->buffer_info[i].dma &&
1772 time_after(jiffies, tx_ring->buffer_info[i].time_stamp + HZ)
1773 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
1775 netif_stop_queue(netdev);
1782 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1783 * @adapter: board private structure
1784 * @rx_desc: receive descriptor
1785 * @sk_buff: socket buffer with received data
1789 ixgb_rx_checksum(struct ixgb_adapter *adapter,
1790 struct ixgb_rx_desc *rx_desc,
1791 struct sk_buff *skb)
1793 /* Ignore Checksum bit is set OR
1794 * TCP Checksum has not been calculated
1796 if((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1797 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1798 skb->ip_summed = CHECKSUM_NONE;
1802 /* At this point we know the hardware did the TCP checksum */
1803 /* now look at the TCP checksum error bit */
1804 if(rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1805 /* let the stack verify checksum errors */
1806 skb->ip_summed = CHECKSUM_NONE;
1807 adapter->hw_csum_rx_error++;
1809 /* TCP checksum is good */
1810 skb->ip_summed = CHECKSUM_UNNECESSARY;
1811 adapter->hw_csum_rx_good++;
1816 * ixgb_clean_rx_irq - Send received data up the network stack,
1817 * @adapter: board private structure
1821 #ifdef CONFIG_IXGB_NAPI
1822 ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1824 ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
1827 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1828 struct net_device *netdev = adapter->netdev;
1829 struct pci_dev *pdev = adapter->pdev;
1830 struct ixgb_rx_desc *rx_desc, *next_rxd;
1831 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
1834 boolean_t cleaned = FALSE;
1836 i = rx_ring->next_to_clean;
1837 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1838 buffer_info = &rx_ring->buffer_info[i];
1840 while(rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
1841 struct sk_buff *skb, *next_skb;
1844 #ifdef CONFIG_IXGB_NAPI
1845 if(*work_done >= work_to_do)
1850 status = rx_desc->status;
1851 skb = buffer_info->skb;
1853 prefetch(skb->data);
1855 if(++i == rx_ring->count) i = 0;
1856 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1859 if((j = i + 1) == rx_ring->count) j = 0;
1860 next2_buffer = &rx_ring->buffer_info[j];
1861 prefetch(next2_buffer);
1863 next_buffer = &rx_ring->buffer_info[i];
1864 next_skb = next_buffer->skb;
1869 pci_unmap_single(pdev,
1871 buffer_info->length,
1872 PCI_DMA_FROMDEVICE);
1874 length = le16_to_cpu(rx_desc->length);
1876 if(unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1878 /* All receives must fit into a single buffer */
1880 IXGB_DBG("Receive packet consumed multiple buffers "
1881 "length<%x>\n", length);
1883 dev_kfree_skb_irq(skb);
1887 if (unlikely(rx_desc->errors
1888 & (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE
1889 | IXGB_RX_DESC_ERRORS_P |
1890 IXGB_RX_DESC_ERRORS_RXE))) {
1892 dev_kfree_skb_irq(skb);
1897 skb_put(skb, length);
1899 /* Receive Checksum Offload */
1900 ixgb_rx_checksum(adapter, rx_desc, skb);
1902 skb->protocol = eth_type_trans(skb, netdev);
1903 #ifdef CONFIG_IXGB_NAPI
1904 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1905 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
1906 le16_to_cpu(rx_desc->special) &
1907 IXGB_RX_DESC_SPECIAL_VLAN_MASK);
1909 netif_receive_skb(skb);
1911 #else /* CONFIG_IXGB_NAPI */
1912 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1913 vlan_hwaccel_rx(skb, adapter->vlgrp,
1914 le16_to_cpu(rx_desc->special) &
1915 IXGB_RX_DESC_SPECIAL_VLAN_MASK);
1919 #endif /* CONFIG_IXGB_NAPI */
1920 netdev->last_rx = jiffies;
1923 /* clean up descriptor, might be written over by hw */
1924 rx_desc->status = 0;
1925 buffer_info->skb = NULL;
1927 /* use prefetched values */
1929 buffer_info = next_buffer;
1932 rx_ring->next_to_clean = i;
1934 ixgb_alloc_rx_buffers(adapter);
1940 * ixgb_alloc_rx_buffers - Replace used receive buffers
1941 * @adapter: address of board private structure
1945 ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter)
1947 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1948 struct net_device *netdev = adapter->netdev;
1949 struct pci_dev *pdev = adapter->pdev;
1950 struct ixgb_rx_desc *rx_desc;
1951 struct ixgb_buffer *buffer_info;
1952 struct sk_buff *skb;
1954 int num_group_tail_writes;
1957 i = rx_ring->next_to_use;
1958 buffer_info = &rx_ring->buffer_info[i];
1959 cleancount = IXGB_DESC_UNUSED(rx_ring);
1961 num_group_tail_writes = IXGB_RX_BUFFER_WRITE;
1963 /* leave three descriptors unused */
1964 while(--cleancount > 2) {
1965 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1967 skb = dev_alloc_skb(adapter->rx_buffer_len + NET_IP_ALIGN);
1969 if(unlikely(!skb)) {
1970 /* Better luck next round */
1974 /* Make buffer alignment 2 beyond a 16 byte boundary
1975 * this will result in a 16 byte aligned IP header after
1976 * the 14 byte MAC header is removed
1978 skb_reserve(skb, NET_IP_ALIGN);
1982 buffer_info->skb = skb;
1983 buffer_info->length = adapter->rx_buffer_len;
1985 pci_map_single(pdev,
1987 adapter->rx_buffer_len,
1988 PCI_DMA_FROMDEVICE);
1990 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1991 /* guarantee DD bit not set now before h/w gets descriptor
1992 * this is the rest of the workaround for h/w double
1994 rx_desc->status = 0;
1996 if((i & ~(num_group_tail_writes- 1)) == i) {
1997 /* Force memory writes to complete before letting h/w
1998 * know there are new descriptors to fetch. (Only
1999 * applicable for weak-ordered memory model archs,
2000 * such as IA-64). */
2003 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2006 if(++i == rx_ring->count) i = 0;
2007 buffer_info = &rx_ring->buffer_info[i];
2010 rx_ring->next_to_use = i;
2014 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2016 * @param netdev network interface device structure
2017 * @param grp indicates to enable or disable tagging/stripping
2020 ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2022 struct ixgb_adapter *adapter = netdev_priv(netdev);
2023 uint32_t ctrl, rctl;
2025 ixgb_irq_disable(adapter);
2026 adapter->vlgrp = grp;
2029 /* enable VLAN tag insert/strip */
2030 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2031 ctrl |= IXGB_CTRL0_VME;
2032 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2034 /* enable VLAN receive filtering */
2036 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2037 rctl |= IXGB_RCTL_VFE;
2038 rctl &= ~IXGB_RCTL_CFIEN;
2039 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2041 /* disable VLAN tag insert/strip */
2043 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2044 ctrl &= ~IXGB_CTRL0_VME;
2045 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2047 /* disable VLAN filtering */
2049 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2050 rctl &= ~IXGB_RCTL_VFE;
2051 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2054 ixgb_irq_enable(adapter);
2058 ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
2060 struct ixgb_adapter *adapter = netdev_priv(netdev);
2061 uint32_t vfta, index;
2063 /* add VID to filter table */
2065 index = (vid >> 5) & 0x7F;
2066 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2067 vfta |= (1 << (vid & 0x1F));
2068 ixgb_write_vfta(&adapter->hw, index, vfta);
2072 ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
2074 struct ixgb_adapter *adapter = netdev_priv(netdev);
2075 uint32_t vfta, index;
2077 ixgb_irq_disable(adapter);
2080 adapter->vlgrp->vlan_devices[vid] = NULL;
2082 ixgb_irq_enable(adapter);
2084 /* remove VID from filter table*/
2086 index = (vid >> 5) & 0x7F;
2087 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2088 vfta &= ~(1 << (vid & 0x1F));
2089 ixgb_write_vfta(&adapter->hw, index, vfta);
2093 ixgb_restore_vlan(struct ixgb_adapter *adapter)
2095 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2097 if(adapter->vlgrp) {
2099 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2100 if(!adapter->vlgrp->vlan_devices[vid])
2102 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2107 #ifdef CONFIG_NET_POLL_CONTROLLER
2109 * Polling 'interrupt' - used by things like netconsole to send skbs
2110 * without having to re-enable interrupts. It's not called while
2111 * the interrupt routine is executing.
2114 static void ixgb_netpoll(struct net_device *dev)
2116 struct ixgb_adapter *adapter = dev->priv;
2118 disable_irq(adapter->pdev->irq);
2119 ixgb_intr(adapter->pdev->irq, dev, NULL);
2120 enable_irq(adapter->pdev->irq);