/******************************************************************************* Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. The full GNU General Public License is included in this distribution in the file called LICENSE. Contact Information: Linux NICS Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 *******************************************************************************/ #include "ixgb.h" /* Change Log * 1.0.88 01/05/05 * - include fix to the condition that determines when to quit NAPI - Robert Olsson * - use netif_poll_{disable/enable} to synchronize between NAPI and i/f up/down * 1.0.84 10/26/04 * - reset buffer_info->dma in Tx resource cleanup logic * 1.0.83 10/12/04 * - sparse cleanup - shemminger@osdl.org * - fix tx resource cleanup logic */ char ixgb_driver_name[] = "ixgb"; char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver"; #ifndef CONFIG_IXGB_NAPI #define DRIVERNAPI #else #define DRIVERNAPI "-NAPI" #endif #define DRV_VERSION "1.0.95-k2"DRIVERNAPI char ixgb_driver_version[] = DRV_VERSION; char ixgb_copyright[] = "Copyright (c) 1999-2005 Intel Corporation."; /* ixgb_pci_tbl - PCI Device ID Table * * Wildcard entries (PCI_ANY_ID) should come last * Last entry must be all 0s * * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, * Class, Class Mask, private data (not used) } */ static struct pci_device_id ixgb_pci_tbl[] = { {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, /* required last entry */ {0,} }; MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl); /* Local Function Prototypes */ int ixgb_up(struct ixgb_adapter *adapter); void ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog); void ixgb_reset(struct ixgb_adapter *adapter); int ixgb_setup_tx_resources(struct ixgb_adapter *adapter); int ixgb_setup_rx_resources(struct ixgb_adapter *adapter); void ixgb_free_tx_resources(struct ixgb_adapter *adapter); void ixgb_free_rx_resources(struct ixgb_adapter *adapter); void ixgb_update_stats(struct ixgb_adapter *adapter); static int ixgb_init_module(void); static void ixgb_exit_module(void); static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent); static void __devexit ixgb_remove(struct pci_dev *pdev); static int ixgb_sw_init(struct ixgb_adapter *adapter); static int ixgb_open(struct net_device *netdev); static int ixgb_close(struct net_device *netdev); static void ixgb_configure_tx(struct ixgb_adapter *adapter); static void ixgb_configure_rx(struct ixgb_adapter *adapter); static void ixgb_setup_rctl(struct ixgb_adapter *adapter); static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter); static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter); static void ixgb_set_multi(struct net_device *netdev); static void ixgb_watchdog(unsigned long data); static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev); static struct net_device_stats *ixgb_get_stats(struct net_device *netdev); static int ixgb_change_mtu(struct net_device *netdev, int new_mtu); static int ixgb_set_mac(struct net_device *netdev, void *p); static irqreturn_t ixgb_intr(int irq, void *data, struct pt_regs *regs); static boolean_t ixgb_clean_tx_irq(struct ixgb_adapter *adapter); #ifdef CONFIG_IXGB_NAPI static int ixgb_clean(struct net_device *netdev, int *budget); static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do); #else static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter); #endif static void ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter); void ixgb_set_ethtool_ops(struct net_device *netdev); static void ixgb_tx_timeout(struct net_device *dev); static void ixgb_tx_timeout_task(struct net_device *dev); static void ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp); static void ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid); static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid); static void ixgb_restore_vlan(struct ixgb_adapter *adapter); #ifdef CONFIG_NET_POLL_CONTROLLER /* for netdump / net console */ static void ixgb_netpoll(struct net_device *dev); #endif /* Exported from other modules */ extern void ixgb_check_options(struct ixgb_adapter *adapter); static struct pci_driver ixgb_driver = { .name = ixgb_driver_name, .id_table = ixgb_pci_tbl, .probe = ixgb_probe, .remove = __devexit_p(ixgb_remove), }; MODULE_AUTHOR("Intel Corporation, "); MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); /* some defines for controlling descriptor fetches in h/w */ #define RXDCTL_WTHRESH_DEFAULT 16 /* chip writes back at this many or RXT0 */ #define RXDCTL_PTHRESH_DEFAULT 0 /* chip considers prefech below * this */ #define RXDCTL_HTHRESH_DEFAULT 0 /* chip will only prefetch if tail * is pushed this many descriptors * from head */ /** * ixgb_init_module - Driver Registration Routine * * ixgb_init_module is the first routine called when the driver is * loaded. All it does is register with the PCI subsystem. **/ static int __init ixgb_init_module(void) { printk(KERN_INFO "%s - version %s\n", ixgb_driver_string, ixgb_driver_version); printk(KERN_INFO "%s\n", ixgb_copyright); return pci_module_init(&ixgb_driver); } module_init(ixgb_init_module); /** * ixgb_exit_module - Driver Exit Cleanup Routine * * ixgb_exit_module is called just before the driver is removed * from memory. **/ static void __exit ixgb_exit_module(void) { pci_unregister_driver(&ixgb_driver); } module_exit(ixgb_exit_module); /** * ixgb_irq_disable - Mask off interrupt generation on the NIC * @adapter: board private structure **/ static inline void ixgb_irq_disable(struct ixgb_adapter *adapter) { atomic_inc(&adapter->irq_sem); IXGB_WRITE_REG(&adapter->hw, IMC, ~0); IXGB_WRITE_FLUSH(&adapter->hw); synchronize_irq(adapter->pdev->irq); } /** * ixgb_irq_enable - Enable default interrupt generation settings * @adapter: board private structure **/ static inline void ixgb_irq_enable(struct ixgb_adapter *adapter) { if(atomic_dec_and_test(&adapter->irq_sem)) { IXGB_WRITE_REG(&adapter->hw, IMS, IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | IXGB_INT_TXDW | IXGB_INT_LSC); IXGB_WRITE_FLUSH(&adapter->hw); } } int ixgb_up(struct ixgb_adapter *adapter) { struct net_device *netdev = adapter->netdev; int err; int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; struct ixgb_hw *hw = &adapter->hw; /* hardware has been reset, we need to reload some things */ ixgb_set_multi(netdev); ixgb_restore_vlan(adapter); ixgb_configure_tx(adapter); ixgb_setup_rctl(adapter); ixgb_configure_rx(adapter); ixgb_alloc_rx_buffers(adapter); #ifdef CONFIG_PCI_MSI { boolean_t pcix = (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) ? TRUE : FALSE; adapter->have_msi = TRUE; if (!pcix) adapter->have_msi = FALSE; else if((err = pci_enable_msi(adapter->pdev))) { printk (KERN_ERR "Unable to allocate MSI interrupt Error: %d\n", err); adapter->have_msi = FALSE; /* proceed to try to request regular interrupt */ } } #endif if((err = request_irq(adapter->pdev->irq, &ixgb_intr, SA_SHIRQ | SA_SAMPLE_RANDOM, netdev->name, netdev))) return err; /* disable interrupts and get the hardware into a known state */ IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff); if((hw->max_frame_size != max_frame) || (hw->max_frame_size != (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) { hw->max_frame_size = max_frame; IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT); if(hw->max_frame_size > IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) { uint32_t ctrl0 = IXGB_READ_REG(hw, CTRL0); if(!(ctrl0 & IXGB_CTRL0_JFE)) { ctrl0 |= IXGB_CTRL0_JFE; IXGB_WRITE_REG(hw, CTRL0, ctrl0); } } } mod_timer(&adapter->watchdog_timer, jiffies); ixgb_irq_enable(adapter); #ifdef CONFIG_IXGB_NAPI netif_poll_enable(netdev); #endif return 0; } void ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog) { struct net_device *netdev = adapter->netdev; ixgb_irq_disable(adapter); free_irq(adapter->pdev->irq, netdev); #ifdef CONFIG_PCI_MSI if(adapter->have_msi == TRUE) pci_disable_msi(adapter->pdev); #endif if(kill_watchdog) del_timer_sync(&adapter->watchdog_timer); #ifdef CONFIG_IXGB_NAPI netif_poll_disable(netdev); #endif adapter->link_speed = 0; adapter->link_duplex = 0; netif_carrier_off(netdev); netif_stop_queue(netdev); ixgb_reset(adapter); ixgb_clean_tx_ring(adapter); ixgb_clean_rx_ring(adapter); } void ixgb_reset(struct ixgb_adapter *adapter) { ixgb_adapter_stop(&adapter->hw); if(!ixgb_init_hw(&adapter->hw)) IXGB_DBG("ixgb_init_hw failed.\n"); } /** * ixgb_probe - Device Initialization Routine * @pdev: PCI device information struct * @ent: entry in ixgb_pci_tbl * * Returns 0 on success, negative on failure * * ixgb_probe initializes an adapter identified by a pci_dev structure. * The OS initialization, configuring of the adapter private structure, * and a hardware reset occur. **/ static int __devinit ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct net_device *netdev = NULL; struct ixgb_adapter *adapter; static int cards_found = 0; unsigned long mmio_start; int mmio_len; int pci_using_dac; int i; int err; if((err = pci_enable_device(pdev))) return err; if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) { pci_using_dac = 1; } else { if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) { IXGB_ERR("No usable DMA configuration, aborting\n"); return err; } pci_using_dac = 0; } if((err = pci_request_regions(pdev, ixgb_driver_name))) return err; pci_set_master(pdev); netdev = alloc_etherdev(sizeof(struct ixgb_adapter)); if(!netdev) { err = -ENOMEM; goto err_alloc_etherdev; } SET_MODULE_OWNER(netdev); SET_NETDEV_DEV(netdev, &pdev->dev); pci_set_drvdata(pdev, netdev); adapter = netdev_priv(netdev); adapter->netdev = netdev; adapter->pdev = pdev; adapter->hw.back = adapter; mmio_start = pci_resource_start(pdev, BAR_0); mmio_len = pci_resource_len(pdev, BAR_0); adapter->hw.hw_addr = ioremap(mmio_start, mmio_len); if(!adapter->hw.hw_addr) { err = -EIO; goto err_ioremap; } for(i = BAR_1; i <= BAR_5; i++) { if(pci_resource_len(pdev, i) == 0) continue; if(pci_resource_flags(pdev, i) & IORESOURCE_IO) { adapter->hw.io_base = pci_resource_start(pdev, i); break; } } netdev->open = &ixgb_open; netdev->stop = &ixgb_close; netdev->hard_start_xmit = &ixgb_xmit_frame; netdev->get_stats = &ixgb_get_stats; netdev->set_multicast_list = &ixgb_set_multi; netdev->set_mac_address = &ixgb_set_mac; netdev->change_mtu = &ixgb_change_mtu; ixgb_set_ethtool_ops(netdev); netdev->tx_timeout = &ixgb_tx_timeout; netdev->watchdog_timeo = HZ; #ifdef CONFIG_IXGB_NAPI netdev->poll = &ixgb_clean; netdev->weight = 64; #endif netdev->vlan_rx_register = ixgb_vlan_rx_register; netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid; netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid; #ifdef CONFIG_NET_POLL_CONTROLLER netdev->poll_controller = ixgb_netpoll; #endif netdev->mem_start = mmio_start; netdev->mem_end = mmio_start + mmio_len; netdev->base_addr = adapter->hw.io_base; adapter->bd_number = cards_found; adapter->link_speed = 0; adapter->link_duplex = 0; /* setup the private structure */ if((err = ixgb_sw_init(adapter))) goto err_sw_init; netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER; #ifdef NETIF_F_TSO netdev->features |= NETIF_F_TSO; #endif if(pci_using_dac) netdev->features |= NETIF_F_HIGHDMA; /* make sure the EEPROM is good */ if(!ixgb_validate_eeprom_checksum(&adapter->hw)) { printk(KERN_ERR "The EEPROM Checksum Is Not Valid\n"); err = -EIO; goto err_eeprom; } ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr); if(!is_valid_ether_addr(netdev->dev_addr)) { err = -EIO; goto err_eeprom; } adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw); init_timer(&adapter->watchdog_timer); adapter->watchdog_timer.function = &ixgb_watchdog; adapter->watchdog_timer.data = (unsigned long)adapter; INIT_WORK(&adapter->tx_timeout_task, (void (*)(void *))ixgb_tx_timeout_task, netdev); if((err = register_netdev(netdev))) goto err_register; /* we're going to reset, so assume we have no link for now */ netif_carrier_off(netdev); netif_stop_queue(netdev); printk(KERN_INFO "%s: Intel(R) PRO/10GbE Network Connection\n", netdev->name); ixgb_check_options(adapter); /* reset the hardware with the new settings */ ixgb_reset(adapter); cards_found++; return 0; err_register: err_sw_init: err_eeprom: iounmap(adapter->hw.hw_addr); err_ioremap: free_netdev(netdev); err_alloc_etherdev: pci_release_regions(pdev); return err; } /** * ixgb_remove - Device Removal Routine * @pdev: PCI device information struct * * ixgb_remove is called by the PCI subsystem to alert the driver * that it should release a PCI device. The could be caused by a * Hot-Plug event, or because the driver is going to be removed from * memory. **/ static void __devexit ixgb_remove(struct pci_dev *pdev) { struct net_device *netdev = pci_get_drvdata(pdev); struct ixgb_adapter *adapter = netdev_priv(netdev); unregister_netdev(netdev); iounmap(adapter->hw.hw_addr); pci_release_regions(pdev); free_netdev(netdev); } /** * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter) * @adapter: board private structure to initialize * * ixgb_sw_init initializes the Adapter private data structure. * Fields are initialized based on PCI device information and * OS network device settings (MTU size). **/ static int __devinit ixgb_sw_init(struct ixgb_adapter *adapter) { struct ixgb_hw *hw = &adapter->hw; struct net_device *netdev = adapter->netdev; struct pci_dev *pdev = adapter->pdev; /* PCI config space info */ hw->vendor_id = pdev->vendor; hw->device_id = pdev->device; hw->subsystem_vendor_id = pdev->subsystem_vendor; hw->subsystem_id = pdev->subsystem_device; adapter->rx_buffer_len = IXGB_RXBUFFER_2048; hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; if((hw->device_id == IXGB_DEVICE_ID_82597EX) ||(hw->device_id == IXGB_DEVICE_ID_82597EX_LR) ||(hw->device_id == IXGB_DEVICE_ID_82597EX_SR)) hw->mac_type = ixgb_82597; else { /* should never have loaded on this device */ printk(KERN_ERR "ixgb: unsupported device id\n"); } /* enable flow control to be programmed */ hw->fc.send_xon = 1; atomic_set(&adapter->irq_sem, 1); spin_lock_init(&adapter->tx_lock); return 0; } /** * ixgb_open - Called when a network interface is made active * @netdev: network interface device structure * * Returns 0 on success, negative value on failure * * The open entry point is called when a network interface is made * active by the system (IFF_UP). At this point all resources needed * for transmit and receive operations are allocated, the interrupt * handler is registered with the OS, the watchdog timer is started, * and the stack is notified that the interface is ready. **/ static int ixgb_open(struct net_device *netdev) { struct ixgb_adapter *adapter = netdev_priv(netdev); int err; /* allocate transmit descriptors */ if((err = ixgb_setup_tx_resources(adapter))) goto err_setup_tx; /* allocate receive descriptors */ if((err = ixgb_setup_rx_resources(adapter))) goto err_setup_rx; if((err = ixgb_up(adapter))) goto err_up; return 0; err_up: ixgb_free_rx_resources(adapter); err_setup_rx: ixgb_free_tx_resources(adapter); err_setup_tx: ixgb_reset(adapter); return err; } /** * ixgb_close - Disables a network interface * @netdev: network interface device structure * * Returns 0, this is not allowed to fail * * The close entry point is called when an interface is de-activated * by the OS. The hardware is still under the drivers control, but * needs to be disabled. A global MAC reset is issued to stop the * hardware, and all transmit and receive resources are freed. **/ static int ixgb_close(struct net_device *netdev) { struct ixgb_adapter *adapter = netdev_priv(netdev); ixgb_down(adapter, TRUE); ixgb_free_tx_resources(adapter); ixgb_free_rx_resources(adapter); return 0; } /** * ixgb_setup_tx_resources - allocate Tx resources (Descriptors) * @adapter: board private structure * * Return 0 on success, negative on failure **/ int ixgb_setup_tx_resources(struct ixgb_adapter *adapter) { struct ixgb_desc_ring *txdr = &adapter->tx_ring; struct pci_dev *pdev = adapter->pdev; int size; size = sizeof(struct ixgb_buffer) * txdr->count; txdr->buffer_info = vmalloc(size); if(!txdr->buffer_info) { return -ENOMEM; } memset(txdr->buffer_info, 0, size); /* round up to nearest 4K */ txdr->size = txdr->count * sizeof(struct ixgb_tx_desc); IXGB_ROUNDUP(txdr->size, 4096); txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma); if(!txdr->desc) { vfree(txdr->buffer_info); return -ENOMEM; } memset(txdr->desc, 0, txdr->size); txdr->next_to_use = 0; txdr->next_to_clean = 0; return 0; } /** * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset. * @adapter: board private structure * * Configure the Tx unit of the MAC after a reset. **/ static void ixgb_configure_tx(struct ixgb_adapter *adapter) { uint64_t tdba = adapter->tx_ring.dma; uint32_t tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc); uint32_t tctl; struct ixgb_hw *hw = &adapter->hw; /* Setup the Base and Length of the Tx Descriptor Ring * tx_ring.dma can be either a 32 or 64 bit value */ IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL)); IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32)); IXGB_WRITE_REG(hw, TDLEN, tdlen); /* Setup the HW Tx Head and Tail descriptor pointers */ IXGB_WRITE_REG(hw, TDH, 0); IXGB_WRITE_REG(hw, TDT, 0); /* don't set up txdctl, it induces performance problems if configured * incorrectly */ /* Set the Tx Interrupt Delay register */ IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay); /* Program the Transmit Control Register */ tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE; IXGB_WRITE_REG(hw, TCTL, tctl); /* Setup Transmit Descriptor Settings for this adapter */ adapter->tx_cmd_type = IXGB_TX_DESC_TYPE | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0); } /** * ixgb_setup_rx_resources - allocate Rx resources (Descriptors) * @adapter: board private structure * * Returns 0 on success, negative on failure **/ int ixgb_setup_rx_resources(struct ixgb_adapter *adapter) { struct ixgb_desc_ring *rxdr = &adapter->rx_ring; struct pci_dev *pdev = adapter->pdev; int size; size = sizeof(struct ixgb_buffer) * rxdr->count; rxdr->buffer_info = vmalloc(size); if(!rxdr->buffer_info) { return -ENOMEM; } memset(rxdr->buffer_info, 0, size); /* Round up to nearest 4K */ rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc); IXGB_ROUNDUP(rxdr->size, 4096); rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma); if(!rxdr->desc) { vfree(rxdr->buffer_info); return -ENOMEM; } memset(rxdr->desc, 0, rxdr->size); rxdr->next_to_clean = 0; rxdr->next_to_use = 0; return 0; } /** * ixgb_setup_rctl - configure the receive control register * @adapter: Board private structure **/ static void ixgb_setup_rctl(struct ixgb_adapter *adapter) { uint32_t rctl; rctl = IXGB_READ_REG(&adapter->hw, RCTL); rctl &= ~(3 << IXGB_RCTL_MO_SHIFT); rctl |= IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 | IXGB_RCTL_RXEN | IXGB_RCTL_CFF | (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT); rctl |= IXGB_RCTL_SECRC; switch (adapter->rx_buffer_len) { case IXGB_RXBUFFER_2048: default: rctl |= IXGB_RCTL_BSIZE_2048; break; case IXGB_RXBUFFER_4096: rctl |= IXGB_RCTL_BSIZE_4096; break; case IXGB_RXBUFFER_8192: rctl |= IXGB_RCTL_BSIZE_8192; break; case IXGB_RXBUFFER_16384: rctl |= IXGB_RCTL_BSIZE_16384; break; } IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); } /** * ixgb_configure_rx - Configure 82597 Receive Unit after Reset. * @adapter: board private structure * * Configure the Rx unit of the MAC after a reset. **/ static void ixgb_configure_rx(struct ixgb_adapter *adapter) { uint64_t rdba = adapter->rx_ring.dma; uint32_t rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc); struct ixgb_hw *hw = &adapter->hw; uint32_t rctl; uint32_t rxcsum; uint32_t rxdctl; /* make sure receives are disabled while setting up the descriptors */ rctl = IXGB_READ_REG(hw, RCTL); IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN); /* set the Receive Delay Timer Register */ IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay); /* Setup the Base and Length of the Rx Descriptor Ring */ IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL)); IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32)); IXGB_WRITE_REG(hw, RDLEN, rdlen); /* Setup the HW Rx Head and Tail Descriptor Pointers */ IXGB_WRITE_REG(hw, RDH, 0); IXGB_WRITE_REG(hw, RDT, 0); /* set up pre-fetching of receive buffers so we get some before we * run out (default hardware behavior is to run out before fetching * more). This sets up to fetch if HTHRESH rx descriptors are avail * and the descriptors in hw cache are below PTHRESH. This avoids * the hardware behavior of fetching <=512 descriptors in a single * burst that pre-empts all other activity, usually causing fifo * overflows. */ /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */ rxdctl = RXDCTL_WTHRESH_DEFAULT << IXGB_RXDCTL_WTHRESH_SHIFT | RXDCTL_HTHRESH_DEFAULT << IXGB_RXDCTL_HTHRESH_SHIFT | RXDCTL_PTHRESH_DEFAULT << IXGB_RXDCTL_PTHRESH_SHIFT; IXGB_WRITE_REG(hw, RXDCTL, rxdctl); /* Enable Receive Checksum Offload for TCP and UDP */ if(adapter->rx_csum == TRUE) { rxcsum = IXGB_READ_REG(hw, RXCSUM); rxcsum |= IXGB_RXCSUM_TUOFL; IXGB_WRITE_REG(hw, RXCSUM, rxcsum); } /* Enable Receives */ IXGB_WRITE_REG(hw, RCTL, rctl); } /** * ixgb_free_tx_resources - Free Tx Resources * @adapter: board private structure * * Free all transmit software resources **/ void ixgb_free_tx_resources(struct ixgb_adapter *adapter) { struct pci_dev *pdev = adapter->pdev; ixgb_clean_tx_ring(adapter); vfree(adapter->tx_ring.buffer_info); adapter->tx_ring.buffer_info = NULL; pci_free_consistent(pdev, adapter->tx_ring.size, adapter->tx_ring.desc, adapter->tx_ring.dma); adapter->tx_ring.desc = NULL; } static inline void ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter, struct ixgb_buffer *buffer_info) { struct pci_dev *pdev = adapter->pdev; if(buffer_info->dma) { pci_unmap_page(pdev, buffer_info->dma, buffer_info->length, PCI_DMA_TODEVICE); buffer_info->dma = 0; } if(buffer_info->skb) { dev_kfree_skb_any(buffer_info->skb); buffer_info->skb = NULL; } } /** * ixgb_clean_tx_ring - Free Tx Buffers * @adapter: board private structure **/ static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter) { struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; struct ixgb_buffer *buffer_info; unsigned long size; unsigned int i; /* Free all the Tx ring sk_buffs */ for(i = 0; i < tx_ring->count; i++) { buffer_info = &tx_ring->buffer_info[i]; ixgb_unmap_and_free_tx_resource(adapter, buffer_info); } size = sizeof(struct ixgb_buffer) * tx_ring->count; memset(tx_ring->buffer_info, 0, size); /* Zero out the descriptor ring */ memset(tx_ring->desc, 0, tx_ring->size); tx_ring->next_to_use = 0; tx_ring->next_to_clean = 0; IXGB_WRITE_REG(&adapter->hw, TDH, 0); IXGB_WRITE_REG(&adapter->hw, TDT, 0); } /** * ixgb_free_rx_resources - Free Rx Resources * @adapter: board private structure * * Free all receive software resources **/ void ixgb_free_rx_resources(struct ixgb_adapter *adapter) { struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; struct pci_dev *pdev = adapter->pdev; ixgb_clean_rx_ring(adapter); vfree(rx_ring->buffer_info); rx_ring->buffer_info = NULL; pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma); rx_ring->desc = NULL; } /** * ixgb_clean_rx_ring - Free Rx Buffers * @adapter: board private structure **/ static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter) { struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; struct ixgb_buffer *buffer_info; struct pci_dev *pdev = adapter->pdev; unsigned long size; unsigned int i; /* Free all the Rx ring sk_buffs */ for(i = 0; i < rx_ring->count; i++) { buffer_info = &rx_ring->buffer_info[i]; if(buffer_info->skb) { pci_unmap_single(pdev, buffer_info->dma, buffer_info->length, PCI_DMA_FROMDEVICE); dev_kfree_skb(buffer_info->skb); buffer_info->skb = NULL; } } size = sizeof(struct ixgb_buffer) * rx_ring->count; memset(rx_ring->buffer_info, 0, size); /* Zero out the descriptor ring */ memset(rx_ring->desc, 0, rx_ring->size); rx_ring->next_to_clean = 0; rx_ring->next_to_use = 0; IXGB_WRITE_REG(&adapter->hw, RDH, 0); IXGB_WRITE_REG(&adapter->hw, RDT, 0); } /** * ixgb_set_mac - Change the Ethernet Address of the NIC * @netdev: network interface device structure * @p: pointer to an address structure * * Returns 0 on success, negative on failure **/ static int ixgb_set_mac(struct net_device *netdev, void *p) { struct ixgb_adapter *adapter = netdev_priv(netdev); struct sockaddr *addr = p; if(!is_valid_ether_addr(addr->sa_data)) return -EADDRNOTAVAIL; memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); ixgb_rar_set(&adapter->hw, addr->sa_data, 0); return 0; } /** * ixgb_set_multi - Multicast and Promiscuous mode set * @netdev: network interface device structure * * The set_multi entry point is called whenever the multicast address * list or the network interface flags are updated. This routine is * responsible for configuring the hardware for proper multicast, * promiscuous mode, and all-multi behavior. **/ static void ixgb_set_multi(struct net_device *netdev) { struct ixgb_adapter *adapter = netdev_priv(netdev); struct ixgb_hw *hw = &adapter->hw; struct dev_mc_list *mc_ptr; uint32_t rctl; int i; /* Check for Promiscuous and All Multicast modes */ rctl = IXGB_READ_REG(hw, RCTL); if(netdev->flags & IFF_PROMISC) { rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE); } else if(netdev->flags & IFF_ALLMULTI) { rctl |= IXGB_RCTL_MPE; rctl &= ~IXGB_RCTL_UPE; } else { rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE); } if(netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) { rctl |= IXGB_RCTL_MPE; IXGB_WRITE_REG(hw, RCTL, rctl); } else { uint8_t mta[netdev->mc_count * IXGB_ETH_LENGTH_OF_ADDRESS]; IXGB_WRITE_REG(hw, RCTL, rctl); for(i = 0, mc_ptr = netdev->mc_list; mc_ptr; i++, mc_ptr = mc_ptr->next) memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS], mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS); ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0); } } /** * ixgb_watchdog - Timer Call-back * @data: pointer to netdev cast into an unsigned long **/ static void ixgb_watchdog(unsigned long data) { struct ixgb_adapter *adapter = (struct ixgb_adapter *)data; struct net_device *netdev = adapter->netdev; struct ixgb_desc_ring *txdr = &adapter->tx_ring; ixgb_check_for_link(&adapter->hw); if (ixgb_check_for_bad_link(&adapter->hw)) { /* force the reset path */ netif_stop_queue(netdev); } if(adapter->hw.link_up) { if(!netif_carrier_ok(netdev)) { printk(KERN_INFO "ixgb: %s NIC Link is Up %d Mbps %s\n", netdev->name, 10000, "Full Duplex"); adapter->link_speed = 10000; adapter->link_duplex = FULL_DUPLEX; netif_carrier_on(netdev); netif_wake_queue(netdev); } } else { if(netif_carrier_ok(netdev)) { adapter->link_speed = 0; adapter->link_duplex = 0; printk(KERN_INFO "ixgb: %s NIC Link is Down\n", netdev->name); netif_carrier_off(netdev); netif_stop_queue(netdev); } } ixgb_update_stats(adapter); if(!netif_carrier_ok(netdev)) { if(IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) { /* We've lost link, so the controller stops DMA, * but we've got queued Tx work that's never going * to get done, so reset controller to flush Tx. * (Do the reset outside of interrupt context). */ schedule_work(&adapter->tx_timeout_task); } } /* Force detection of hung controller every watchdog period */ adapter->detect_tx_hung = TRUE; /* generate an interrupt to force clean up of any stragglers */ IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW); /* Reset the timer */ mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ); } #define IXGB_TX_FLAGS_CSUM 0x00000001 #define IXGB_TX_FLAGS_VLAN 0x00000002 #define IXGB_TX_FLAGS_TSO 0x00000004 static inline int ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb) { #ifdef NETIF_F_TSO struct ixgb_context_desc *context_desc; unsigned int i; uint8_t ipcss, ipcso, tucss, tucso, hdr_len; uint16_t ipcse, tucse, mss; int err; if(likely(skb_shinfo(skb)->tso_size)) { if (skb_header_cloned(skb)) { err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); if (err) return err; } hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2)); mss = skb_shinfo(skb)->tso_size; skb->nh.iph->tot_len = 0; skb->nh.iph->check = 0; skb->h.th->check = ~csum_tcpudp_magic(skb->nh.iph->saddr, skb->nh.iph->daddr, 0, IPPROTO_TCP, 0); ipcss = skb->nh.raw - skb->data; ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data; ipcse = skb->h.raw - skb->data - 1; tucss = skb->h.raw - skb->data; tucso = (void *)&(skb->h.th->check) - (void *)skb->data; tucse = 0; i = adapter->tx_ring.next_to_use; context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); context_desc->ipcss = ipcss; context_desc->ipcso = ipcso; context_desc->ipcse = cpu_to_le16(ipcse); context_desc->tucss = tucss; context_desc->tucso = tucso; context_desc->tucse = cpu_to_le16(tucse); context_desc->mss = cpu_to_le16(mss); context_desc->hdr_len = hdr_len; context_desc->status = 0; context_desc->cmd_type_len = cpu_to_le32( IXGB_CONTEXT_DESC_TYPE | IXGB_CONTEXT_DESC_CMD_TSE | IXGB_CONTEXT_DESC_CMD_IP | IXGB_CONTEXT_DESC_CMD_TCP | IXGB_CONTEXT_DESC_CMD_IDE | (skb->len - (hdr_len))); if(++i == adapter->tx_ring.count) i = 0; adapter->tx_ring.next_to_use = i; return 1; } #endif return 0; } static inline boolean_t ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb) { struct ixgb_context_desc *context_desc; unsigned int i; uint8_t css, cso; if(likely(skb->ip_summed == CHECKSUM_HW)) { css = skb->h.raw - skb->data; cso = (skb->h.raw + skb->csum) - skb->data; i = adapter->tx_ring.next_to_use; context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); context_desc->tucss = css; context_desc->tucso = cso; context_desc->tucse = 0; /* zero out any previously existing data in one instruction */ *(uint32_t *)&(context_desc->ipcss) = 0; context_desc->status = 0; context_desc->hdr_len = 0; context_desc->mss = 0; context_desc->cmd_type_len = cpu_to_le32(IXGB_CONTEXT_DESC_TYPE | IXGB_TX_DESC_CMD_IDE); if(++i == adapter->tx_ring.count) i = 0; adapter->tx_ring.next_to_use = i; return TRUE; } return FALSE; } #define IXGB_MAX_TXD_PWR 14 #define IXGB_MAX_DATA_PER_TXD (1<tx_ring; struct ixgb_buffer *buffer_info; int len = skb->len; unsigned int offset = 0, size, count = 0, i; unsigned int nr_frags = skb_shinfo(skb)->nr_frags; unsigned int f; len -= skb->data_len; i = tx_ring->next_to_use; while(len) { buffer_info = &tx_ring->buffer_info[i]; size = min(len, IXGB_MAX_JUMBO_FRAME_SIZE); buffer_info->length = size; buffer_info->dma = pci_map_single(adapter->pdev, skb->data + offset, size, PCI_DMA_TODEVICE); buffer_info->time_stamp = jiffies; len -= size; offset += size; count++; if(++i == tx_ring->count) i = 0; } for(f = 0; f < nr_frags; f++) { struct skb_frag_struct *frag; frag = &skb_shinfo(skb)->frags[f]; len = frag->size; offset = 0; while(len) { buffer_info = &tx_ring->buffer_info[i]; size = min(len, IXGB_MAX_JUMBO_FRAME_SIZE); buffer_info->length = size; buffer_info->dma = pci_map_page(adapter->pdev, frag->page, frag->page_offset + offset, size, PCI_DMA_TODEVICE); buffer_info->time_stamp = jiffies; len -= size; offset += size; count++; if(++i == tx_ring->count) i = 0; } } i = (i == 0) ? tx_ring->count - 1 : i - 1; tx_ring->buffer_info[i].skb = skb; tx_ring->buffer_info[first].next_to_watch = i; return count; } static inline void ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags) { struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; struct ixgb_tx_desc *tx_desc = NULL; struct ixgb_buffer *buffer_info; uint32_t cmd_type_len = adapter->tx_cmd_type; uint8_t status = 0; uint8_t popts = 0; unsigned int i; if(tx_flags & IXGB_TX_FLAGS_TSO) { cmd_type_len |= IXGB_TX_DESC_CMD_TSE; popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM); } if(tx_flags & IXGB_TX_FLAGS_CSUM) popts |= IXGB_TX_DESC_POPTS_TXSM; if(tx_flags & IXGB_TX_FLAGS_VLAN) { cmd_type_len |= IXGB_TX_DESC_CMD_VLE; } i = tx_ring->next_to_use; while(count--) { buffer_info = &tx_ring->buffer_info[i]; tx_desc = IXGB_TX_DESC(*tx_ring, i); tx_desc->buff_addr = cpu_to_le64(buffer_info->dma); tx_desc->cmd_type_len = cpu_to_le32(cmd_type_len | buffer_info->length); tx_desc->status = status; tx_desc->popts = popts; tx_desc->vlan = cpu_to_le16(vlan_id); if(++i == tx_ring->count) i = 0; } tx_desc->cmd_type_len |= cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS ); /* Force memory writes to complete before letting h/w * know there are new descriptors to fetch. (Only * applicable for weak-ordered memory model archs, * such as IA-64). */ wmb(); tx_ring->next_to_use = i; IXGB_WRITE_REG(&adapter->hw, TDT, i); } /* Tx Descriptors needed, worst case */ #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \ (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0)) #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) + \ MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev) { struct ixgb_adapter *adapter = netdev_priv(netdev); unsigned int first; unsigned int tx_flags = 0; unsigned long flags; int vlan_id = 0; int tso; if(skb->len <= 0) { dev_kfree_skb_any(skb); return 0; } spin_lock_irqsave(&adapter->tx_lock, flags); if(unlikely(IXGB_DESC_UNUSED(&adapter->tx_ring) < DESC_NEEDED)) { netif_stop_queue(netdev); spin_unlock_irqrestore(&adapter->tx_lock, flags); return 1; } spin_unlock_irqrestore(&adapter->tx_lock, flags); if(adapter->vlgrp && vlan_tx_tag_present(skb)) { tx_flags |= IXGB_TX_FLAGS_VLAN; vlan_id = vlan_tx_tag_get(skb); } first = adapter->tx_ring.next_to_use; tso = ixgb_tso(adapter, skb); if (tso < 0) { dev_kfree_skb_any(skb); return NETDEV_TX_OK; } if (tso) tx_flags |= IXGB_TX_FLAGS_TSO; else if(ixgb_tx_csum(adapter, skb)) tx_flags |= IXGB_TX_FLAGS_CSUM; ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id, tx_flags); netdev->trans_start = jiffies; return 0; } /** * ixgb_tx_timeout - Respond to a Tx Hang * @netdev: network interface device structure **/ static void ixgb_tx_timeout(struct net_device *netdev) { struct ixgb_adapter *adapter = netdev_priv(netdev); /* Do the reset outside of interrupt context */ schedule_work(&adapter->tx_timeout_task); } static void ixgb_tx_timeout_task(struct net_device *netdev) { struct ixgb_adapter *adapter = netdev_priv(netdev); ixgb_down(adapter, TRUE); ixgb_up(adapter); } /** * ixgb_get_stats - Get System Network Statistics * @netdev: network interface device structure * * Returns the address of the device statistics structure. * The statistics are actually updated from the timer callback. **/ static struct net_device_stats * ixgb_get_stats(struct net_device *netdev) { struct ixgb_adapter *adapter = netdev_priv(netdev); return &adapter->net_stats; } /** * ixgb_change_mtu - Change the Maximum Transfer Unit * @netdev: network interface device structure * @new_mtu: new value for maximum frame size * * Returns 0 on success, negative on failure **/ static int ixgb_change_mtu(struct net_device *netdev, int new_mtu) { struct ixgb_adapter *adapter = netdev_priv(netdev); int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; if((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) || (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) { IXGB_ERR("Invalid MTU setting\n"); return -EINVAL; } if((max_frame <= IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) || (max_frame <= IXGB_RXBUFFER_2048)) { adapter->rx_buffer_len = IXGB_RXBUFFER_2048; } else if(max_frame <= IXGB_RXBUFFER_4096) { adapter->rx_buffer_len = IXGB_RXBUFFER_4096; } else if(max_frame <= IXGB_RXBUFFER_8192) { adapter->rx_buffer_len = IXGB_RXBUFFER_8192; } else { adapter->rx_buffer_len = IXGB_RXBUFFER_16384; } netdev->mtu = new_mtu; if(old_max_frame != max_frame && netif_running(netdev)) { ixgb_down(adapter, TRUE); ixgb_up(adapter); } return 0; } /** * ixgb_update_stats - Update the board statistics counters. * @adapter: board private structure **/ void ixgb_update_stats(struct ixgb_adapter *adapter) { struct net_device *netdev = adapter->netdev; if((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) || (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) { u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL); u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL); u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH); u64 bcast = ((u64)bcast_h << 32) | bcast_l; multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32); /* fix up multicast stats by removing broadcasts */ multi -= bcast; adapter->stats.mprcl += (multi & 0xFFFFFFFF); adapter->stats.mprch += (multi >> 32); adapter->stats.bprcl += bcast_l; adapter->stats.bprch += bcast_h; } else { adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL); adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH); adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL); adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH); } adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL); adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH); adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL); adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH); adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL); adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH); adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL); adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH); adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL); adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH); adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL); adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH); adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL); adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH); adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC); adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC); adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC); adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC); adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS); adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC); adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC); adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC); adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL); adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH); adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL); adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH); adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL); adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH); adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL); adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH); adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL); adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH); adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL); adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH); adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL); adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH); adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL); adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH); adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL); adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH); adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC); adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C); adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC); adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC); adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC); adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC); adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC); adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC); adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC); adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC); adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC); adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC); adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC); adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC); adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC); adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC); /* Fill out the OS statistics structure */ adapter->net_stats.rx_packets = adapter->stats.gprcl; adapter->net_stats.tx_packets = adapter->stats.gptcl; adapter->net_stats.rx_bytes = adapter->stats.gorcl; adapter->net_stats.tx_bytes = adapter->stats.gotcl; adapter->net_stats.multicast = adapter->stats.mprcl; adapter->net_stats.collisions = 0; /* ignore RLEC as it reports errors for padded (<64bytes) frames * with a length in the type/len field */ adapter->net_stats.rx_errors = /* adapter->stats.rnbc + */ adapter->stats.crcerrs + adapter->stats.ruc + adapter->stats.roc /*+ adapter->stats.rlec */ + adapter->stats.icbc + adapter->stats.ecbc + adapter->stats.mpc; adapter->net_stats.rx_dropped = adapter->stats.mpc; /* see above * adapter->net_stats.rx_length_errors = adapter->stats.rlec; */ adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs; adapter->net_stats.rx_fifo_errors = adapter->stats.mpc; adapter->net_stats.rx_missed_errors = adapter->stats.mpc; adapter->net_stats.rx_over_errors = adapter->stats.mpc; adapter->net_stats.tx_errors = 0; adapter->net_stats.rx_frame_errors = 0; adapter->net_stats.tx_aborted_errors = 0; adapter->net_stats.tx_carrier_errors = 0; adapter->net_stats.tx_fifo_errors = 0; adapter->net_stats.tx_heartbeat_errors = 0; adapter->net_stats.tx_window_errors = 0; } #define IXGB_MAX_INTR 10 /** * ixgb_intr - Interrupt Handler * @irq: interrupt number * @data: pointer to a network interface device structure * @pt_regs: CPU registers structure **/ static irqreturn_t ixgb_intr(int irq, void *data, struct pt_regs *regs) { struct net_device *netdev = data; struct ixgb_adapter *adapter = netdev_priv(netdev); struct ixgb_hw *hw = &adapter->hw; uint32_t icr = IXGB_READ_REG(hw, ICR); #ifndef CONFIG_IXGB_NAPI unsigned int i; #endif if(unlikely(!icr)) return IRQ_NONE; /* Not our interrupt */ if(unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) { mod_timer(&adapter->watchdog_timer, jiffies); } #ifdef CONFIG_IXGB_NAPI if(netif_rx_schedule_prep(netdev)) { /* Disable interrupts and register for poll. The flush of the posted write is intentionally left out. */ atomic_inc(&adapter->irq_sem); IXGB_WRITE_REG(&adapter->hw, IMC, ~0); __netif_rx_schedule(netdev); } #else /* yes, that is actually a & and it is meant to make sure that * every pass through this for loop checks both receive and * transmit queues for completed descriptors, intended to * avoid starvation issues and assist tx/rx fairness. */ for(i = 0; i < IXGB_MAX_INTR; i++) if(!ixgb_clean_rx_irq(adapter) & !ixgb_clean_tx_irq(adapter)) break; #endif return IRQ_HANDLED; } #ifdef CONFIG_IXGB_NAPI /** * ixgb_clean - NAPI Rx polling callback * @adapter: board private structure **/ static int ixgb_clean(struct net_device *netdev, int *budget) { struct ixgb_adapter *adapter = netdev_priv(netdev); int work_to_do = min(*budget, netdev->quota); int tx_cleaned; int work_done = 0; tx_cleaned = ixgb_clean_tx_irq(adapter); ixgb_clean_rx_irq(adapter, &work_done, work_to_do); *budget -= work_done; netdev->quota -= work_done; /* if no Tx and not enough Rx work done, exit the polling mode */ if((!tx_cleaned && (work_done == 0)) || !netif_running(netdev)) { netif_rx_complete(netdev); ixgb_irq_enable(adapter); return 0; } return 1; } #endif /** * ixgb_clean_tx_irq - Reclaim resources after transmit completes * @adapter: board private structure **/ static boolean_t ixgb_clean_tx_irq(struct ixgb_adapter *adapter) { struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; struct net_device *netdev = adapter->netdev; struct ixgb_tx_desc *tx_desc, *eop_desc; struct ixgb_buffer *buffer_info; unsigned int i, eop; boolean_t cleaned = FALSE; i = tx_ring->next_to_clean; eop = tx_ring->buffer_info[i].next_to_watch; eop_desc = IXGB_TX_DESC(*tx_ring, eop); while(eop_desc->status & IXGB_TX_DESC_STATUS_DD) { for(cleaned = FALSE; !cleaned; ) { tx_desc = IXGB_TX_DESC(*tx_ring, i); buffer_info = &tx_ring->buffer_info[i]; if (tx_desc->popts & (IXGB_TX_DESC_POPTS_TXSM | IXGB_TX_DESC_POPTS_IXSM)) adapter->hw_csum_tx_good++; ixgb_unmap_and_free_tx_resource(adapter, buffer_info); *(uint32_t *)&(tx_desc->status) = 0; cleaned = (i == eop); if(++i == tx_ring->count) i = 0; } eop = tx_ring->buffer_info[i].next_to_watch; eop_desc = IXGB_TX_DESC(*tx_ring, eop); } tx_ring->next_to_clean = i; spin_lock(&adapter->tx_lock); if(cleaned && netif_queue_stopped(netdev) && netif_carrier_ok(netdev) && (IXGB_DESC_UNUSED(tx_ring) > IXGB_TX_QUEUE_WAKE)) { netif_wake_queue(netdev); } spin_unlock(&adapter->tx_lock); if(adapter->detect_tx_hung) { /* detect a transmit hang in hardware, this serializes the * check with the clearing of time_stamp and movement of i */ adapter->detect_tx_hung = FALSE; if(tx_ring->buffer_info[i].dma && time_after(jiffies, tx_ring->buffer_info[i].time_stamp + HZ) && !(IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_TXOFF)) netif_stop_queue(netdev); } return cleaned; } /** * ixgb_rx_checksum - Receive Checksum Offload for 82597. * @adapter: board private structure * @rx_desc: receive descriptor * @sk_buff: socket buffer with received data **/ static inline void ixgb_rx_checksum(struct ixgb_adapter *adapter, struct ixgb_rx_desc *rx_desc, struct sk_buff *skb) { /* Ignore Checksum bit is set OR * TCP Checksum has not been calculated */ if((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) || (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) { skb->ip_summed = CHECKSUM_NONE; return; } /* At this point we know the hardware did the TCP checksum */ /* now look at the TCP checksum error bit */ if(rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) { /* let the stack verify checksum errors */ skb->ip_summed = CHECKSUM_NONE; adapter->hw_csum_rx_error++; } else { /* TCP checksum is good */ skb->ip_summed = CHECKSUM_UNNECESSARY; adapter->hw_csum_rx_good++; } } /** * ixgb_clean_rx_irq - Send received data up the network stack, * @adapter: board private structure **/ static boolean_t #ifdef CONFIG_IXGB_NAPI ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do) #else ixgb_clean_rx_irq(struct ixgb_adapter *adapter) #endif { struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; struct net_device *netdev = adapter->netdev; struct pci_dev *pdev = adapter->pdev; struct ixgb_rx_desc *rx_desc, *next_rxd; struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer; uint32_t length; unsigned int i, j; boolean_t cleaned = FALSE; i = rx_ring->next_to_clean; rx_desc = IXGB_RX_DESC(*rx_ring, i); buffer_info = &rx_ring->buffer_info[i]; while(rx_desc->status & IXGB_RX_DESC_STATUS_DD) { struct sk_buff *skb, *next_skb; u8 status; #ifdef CONFIG_IXGB_NAPI if(*work_done >= work_to_do) break; (*work_done)++; #endif status = rx_desc->status; skb = buffer_info->skb; prefetch(skb->data); if(++i == rx_ring->count) i = 0; next_rxd = IXGB_RX_DESC(*rx_ring, i); prefetch(next_rxd); if((j = i + 1) == rx_ring->count) j = 0; next2_buffer = &rx_ring->buffer_info[j]; prefetch(next2_buffer); next_buffer = &rx_ring->buffer_info[i]; next_skb = next_buffer->skb; prefetch(next_skb); cleaned = TRUE; pci_unmap_single(pdev, buffer_info->dma, buffer_info->length, PCI_DMA_FROMDEVICE); length = le16_to_cpu(rx_desc->length); if(unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) { /* All receives must fit into a single buffer */ IXGB_DBG("Receive packet consumed multiple buffers " "length<%x>\n", length); dev_kfree_skb_irq(skb); goto rxdesc_done; } if (unlikely(rx_desc->errors & (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE | IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) { dev_kfree_skb_irq(skb); goto rxdesc_done; } /* Good Receive */ skb_put(skb, length); /* Receive Checksum Offload */ ixgb_rx_checksum(adapter, rx_desc, skb); skb->protocol = eth_type_trans(skb, netdev); #ifdef CONFIG_IXGB_NAPI if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) { vlan_hwaccel_receive_skb(skb, adapter->vlgrp, le16_to_cpu(rx_desc->special) & IXGB_RX_DESC_SPECIAL_VLAN_MASK); } else { netif_receive_skb(skb); } #else /* CONFIG_IXGB_NAPI */ if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) { vlan_hwaccel_rx(skb, adapter->vlgrp, le16_to_cpu(rx_desc->special) & IXGB_RX_DESC_SPECIAL_VLAN_MASK); } else { netif_rx(skb); } #endif /* CONFIG_IXGB_NAPI */ netdev->last_rx = jiffies; rxdesc_done: /* clean up descriptor, might be written over by hw */ rx_desc->status = 0; buffer_info->skb = NULL; /* use prefetched values */ rx_desc = next_rxd; buffer_info = next_buffer; } rx_ring->next_to_clean = i; ixgb_alloc_rx_buffers(adapter); return cleaned; } /** * ixgb_alloc_rx_buffers - Replace used receive buffers * @adapter: address of board private structure **/ static void ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter) { struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; struct net_device *netdev = adapter->netdev; struct pci_dev *pdev = adapter->pdev; struct ixgb_rx_desc *rx_desc; struct ixgb_buffer *buffer_info; struct sk_buff *skb; unsigned int i; int num_group_tail_writes; long cleancount; i = rx_ring->next_to_use; buffer_info = &rx_ring->buffer_info[i]; cleancount = IXGB_DESC_UNUSED(rx_ring); num_group_tail_writes = IXGB_RX_BUFFER_WRITE; /* leave three descriptors unused */ while(--cleancount > 2) { rx_desc = IXGB_RX_DESC(*rx_ring, i); skb = dev_alloc_skb(adapter->rx_buffer_len + NET_IP_ALIGN); if(unlikely(!skb)) { /* Better luck next round */ break; } /* Make buffer alignment 2 beyond a 16 byte boundary * this will result in a 16 byte aligned IP header after * the 14 byte MAC header is removed */ skb_reserve(skb, NET_IP_ALIGN); skb->dev = netdev; buffer_info->skb = skb; buffer_info->length = adapter->rx_buffer_len; buffer_info->dma = pci_map_single(pdev, skb->data, adapter->rx_buffer_len, PCI_DMA_FROMDEVICE); rx_desc->buff_addr = cpu_to_le64(buffer_info->dma); /* guarantee DD bit not set now before h/w gets descriptor * this is the rest of the workaround for h/w double * writeback. */ rx_desc->status = 0; if((i & ~(num_group_tail_writes- 1)) == i) { /* Force memory writes to complete before letting h/w * know there are new descriptors to fetch. (Only * applicable for weak-ordered memory model archs, * such as IA-64). */ wmb(); IXGB_WRITE_REG(&adapter->hw, RDT, i); } if(++i == rx_ring->count) i = 0; buffer_info = &rx_ring->buffer_info[i]; } rx_ring->next_to_use = i; } /** * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping. * * @param netdev network interface device structure * @param grp indicates to enable or disable tagging/stripping **/ static void ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp) { struct ixgb_adapter *adapter = netdev_priv(netdev); uint32_t ctrl, rctl; ixgb_irq_disable(adapter); adapter->vlgrp = grp; if(grp) { /* enable VLAN tag insert/strip */ ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); ctrl |= IXGB_CTRL0_VME; IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); /* enable VLAN receive filtering */ rctl = IXGB_READ_REG(&adapter->hw, RCTL); rctl |= IXGB_RCTL_VFE; rctl &= ~IXGB_RCTL_CFIEN; IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); } else { /* disable VLAN tag insert/strip */ ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); ctrl &= ~IXGB_CTRL0_VME; IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); /* disable VLAN filtering */ rctl = IXGB_READ_REG(&adapter->hw, RCTL); rctl &= ~IXGB_RCTL_VFE; IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); } ixgb_irq_enable(adapter); } static void ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid) { struct ixgb_adapter *adapter = netdev_priv(netdev); uint32_t vfta, index; /* add VID to filter table */ index = (vid >> 5) & 0x7F; vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); vfta |= (1 << (vid & 0x1F)); ixgb_write_vfta(&adapter->hw, index, vfta); } static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid) { struct ixgb_adapter *adapter = netdev_priv(netdev); uint32_t vfta, index; ixgb_irq_disable(adapter); if(adapter->vlgrp) adapter->vlgrp->vlan_devices[vid] = NULL; ixgb_irq_enable(adapter); /* remove VID from filter table*/ index = (vid >> 5) & 0x7F; vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); vfta &= ~(1 << (vid & 0x1F)); ixgb_write_vfta(&adapter->hw, index, vfta); } static void ixgb_restore_vlan(struct ixgb_adapter *adapter) { ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp); if(adapter->vlgrp) { uint16_t vid; for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) { if(!adapter->vlgrp->vlan_devices[vid]) continue; ixgb_vlan_rx_add_vid(adapter->netdev, vid); } } } #ifdef CONFIG_NET_POLL_CONTROLLER /* * Polling 'interrupt' - used by things like netconsole to send skbs * without having to re-enable interrupts. It's not called while * the interrupt routine is executing. */ static void ixgb_netpoll(struct net_device *dev) { struct ixgb_adapter *adapter = dev->priv; disable_irq(adapter->pdev->irq); ixgb_intr(adapter->pdev->irq, dev, NULL); enable_irq(adapter->pdev->irq); } #endif /* ixgb_main.c */