X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fnet%2Fixgb%2Fixgb_main.c;h=cfd67d812f0db4094fd86d35e205873d0ac5b5e6;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=1637e8c8b6d6ee6089d5ae82a612db517d45b6a2;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c index 1637e8c8b..cfd67d812 100644 --- a/drivers/net/ixgb/ixgb_main.c +++ b/drivers/net/ixgb/ixgb_main.c @@ -1,7 +1,7 @@ /******************************************************************************* - Copyright(c) 1999 - 2003 Intel Corporation. All rights reserved. + 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 @@ -23,36 +23,54 @@ Contact Information: Linux NICS Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 -*******************************************************************************/ -#define __IXGB_MAIN__ +*******************************************************************************/ #include "ixgb.h" +/* Change Log + * 1.0.96 04/19/05 + * - Make needlessly global code static -- bunk@stusta.de + * - ethtool cleanup -- shemminger@osdl.org + * - Support for MODULE_VERSION -- linville@tuxdriver.com + * - add skb_header_cloned check to the tso path -- herbert@apana.org.au + * 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"; -char ixgb_driver_version[] = "1.0.47-k1jg"; -char ixgb_copyright[] = "Copyright (c) 2001-2003 Intel Corporation."; +static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver"; + +#ifndef CONFIG_IXGB_NAPI +#define DRIVERNAPI +#else +#define DRIVERNAPI "-NAPI" +#endif +#define DRV_VERSION "1.0.100-k2"DRIVERNAPI +char ixgb_driver_version[] = DRV_VERSION; +static char ixgb_copyright[] = "Copyright (c) 1999-2005 Intel Corporation."; /* ixgb_pci_tbl - PCI Device ID Table * - * For selecting devices to load on private driver_data field (last one) - * stores an index into ixgb_strings. * 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, String Index } + * Class, Class Mask, private data (not used) } */ static struct pci_device_id ixgb_pci_tbl[] = { - /* Intel(R) PRO/10GbE Network Connection */ - {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX, - INTEL_SUBVENDOR_ID, IXGB_SUBDEVICE_ID_A11F, 0, 0, 0}, - {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX, - INTEL_SUBVENDOR_ID, IXGB_SUBDEVICE_ID_A01F, 0, 0, 0}, - /* Generic */ {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,} @@ -60,99 +78,86 @@ static struct pci_device_id ixgb_pci_tbl[] = { MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl); -static char *ixgb_strings[] = { - "Intel(R) PRO/10GbE Network Connection" -}; - /* 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 ixgb_remove(struct pci_dev *pdev); -static void ixgb_sw_init(struct ixgb_adapter *adapter); +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 int ixgb_setup_tx_resources(struct ixgb_adapter *adapter); -static int ixgb_setup_rx_resources(struct ixgb_adapter *adapter); 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_free_tx_resources(struct ixgb_adapter *adapter); -static void ixgb_free_rx_resources(struct ixgb_adapter *adapter); static void ixgb_set_multi(struct net_device *netdev); static void ixgb_watchdog(unsigned long data); -static inline boolean_t ixgb_tso(struct ixgb_adapter *adapter, - struct sk_buff *skb); static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev); -static void ixgb_tx_timeout(struct net_device *netdev); -static void ixgb_tx_timeout_task(struct net_device *netdev); -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, u16 vid); -static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid); -static void ixgb_restore_vlan(struct ixgb_adapter *adapter); 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 void ixgb_update_stats(struct ixgb_adapter *adapter); -static inline void ixgb_irq_disable(struct ixgb_adapter *adapter); -static inline void ixgb_irq_enable(struct ixgb_adapter *adapter); static irqreturn_t ixgb_intr(int irq, void *data, struct pt_regs *regs); -static void ixgb_clean_tx_irq(struct ixgb_adapter *adapter); +static boolean_t ixgb_clean_tx_irq(struct ixgb_adapter *adapter); + #ifdef CONFIG_IXGB_NAPI -static int ixgb_poll(struct net_device *netdev, int *budget); +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 void ixgb_clean_rx_irq(struct ixgb_adapter *adapter); +static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter); #endif static void ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter); -static int ixgb_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd); -static inline void ixgb_rx_checksum(struct ixgb_adapter *adapter, - struct ixgb_rx_desc *rx_desc, - struct sk_buff *skb); -static int ixgb_notify_reboot(struct notifier_block *, unsigned long event, - void *ptr); -static int ixgb_suspend(struct pci_dev *pdev, u32 state); - -struct notifier_block ixgb_notifier_reboot = { - .notifier_call = ixgb_notify_reboot, - .next = NULL, - .priority = 0 -}; +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); -extern int ixgb_ethtool_ioctl(struct net_device *netdev, struct ifreq *ifr); static struct pci_driver ixgb_driver = { - .name = ixgb_driver_name, - .id_table = ixgb_pci_tbl, - .probe = ixgb_probe, - .remove = __devexit_p(ixgb_remove), - /* Power Managment Hooks */ - .suspend = NULL, - .resume = NULL + .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_PTHRESH_DEFAULT 128 /* chip considers prefech below this */ -#define RXDCTL_HTHRESH_DEFAULT 16 /* chip will only prefetch if tail is - pushed this many descriptors from head */ #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 - 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. @@ -161,26 +166,18 @@ MODULE_LICENSE("GPL"); static int __init ixgb_init_module(void) { - int ret; - IXGB_DBG("ixgb_init_module\n"); + printk(KERN_INFO "%s - version %s\n", + ixgb_driver_string, ixgb_driver_version); - printk(KERN_INFO "%s - version %s\n", ixgb_driver_string, - ixgb_driver_version); printk(KERN_INFO "%s\n", ixgb_copyright); -#ifdef CONFIG_IXGB_NAPI - printk(KERN_INFO "NAPI Enabled\n"); -#endif - ret = pci_module_init(&ixgb_driver); - if (ret >= 0) { - register_reboot_notifier(&ixgb_notifier_reboot); - } - return ret; + + return pci_module_init(&ixgb_driver); } module_init(ixgb_init_module); /** - * ixgb_exit_module - Driver Exit Cleanup Routine. + * ixgb_exit_module - Driver Exit Cleanup Routine * * ixgb_exit_module is called just before the driver is removed * from memory. @@ -189,38 +186,53 @@ module_init(ixgb_init_module); static void __exit ixgb_exit_module(void) { - - IXGB_DBG("ixgb_exit_module\n"); - unregister_reboot_notifier(&ixgb_notifier_reboot); pci_unregister_driver(&ixgb_driver); } module_exit(ixgb_exit_module); /** - * ixgb_up - Driver ifconfig UP routine. - * - * ixgb_up is called to initialize and bring online an interface. - * @param adapter board private structure + * 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; - IXGB_DBG("ixgb_up\n"); - - if (request_irq(netdev->irq, &ixgb_intr, SA_SHIRQ | SA_SAMPLE_RANDOM, - netdev->name, netdev)) { - IXGB_DBG("%s: request_irq failed\n", netdev->name); - return -1; - } - /* disable interrupts and get the hardware into a known state */ - IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff); + /* hardware has been reset, we need to reload some things */ - /* hardware was reset in probe/down, we need to reload some things */ ixgb_set_multi(netdev); + ixgb_restore_vlan(adapter); ixgb_configure_tx(adapter); @@ -228,70 +240,110 @@ ixgb_up(struct ixgb_adapter *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); - IXGB_DBG("ixgb_up: RAH_0 is <%x>\n", IXGB_READ_REG(&adapter->hw, RAH)); - IXGB_DBG("ixgb_up: RDBAL is <%x>\n", - IXGB_READ_REG(&adapter->hw, RDBAL)); +#ifdef CONFIG_IXGB_NAPI + netif_poll_enable(netdev); +#endif return 0; } -/** - * ixgb_down - Driver ifconfig DOWN routine. - * - * ixgb_down is called to uninitialize and take offline an interface. - * @param adapter board private structure - * @param kill_watchdog - **/ void ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog) { struct net_device *netdev = adapter->netdev; - IXGB_DBG("ixgb_down\n"); - ixgb_irq_disable(adapter); - free_irq(netdev->irq, netdev); - if (kill_watchdog) + 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); } -/** - * ixgb_reset - hardware reset. - * - * ixgb_reset is called to initialize hardware to a known state. - * @param adapter board private structure - **/ void ixgb_reset(struct ixgb_adapter *adapter) { - IXGB_DBG("ixgb_reset\n"); ixgb_adapter_stop(&adapter->hw); - if (!ixgb_init_hw(&adapter->hw)) + if(!ixgb_init_hw(&adapter->hw)) IXGB_DBG("ixgb_init_hw failed.\n"); } /** - * ixgb_probe - Device Initialization Routine. - * @param pdev PCI device information struct - * @param ent entry in ixgb_pci_table + * 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) +ixgb_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) { struct net_device *netdev = NULL; struct ixgb_adapter *adapter; @@ -300,35 +352,31 @@ ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) int mmio_len; int pci_using_dac; int i; + int err; - IXGB_DBG("ixgb_probe\n"); - - if ((i = pci_enable_device(pdev))) { - IXGB_ERR("pci_enable_device failed\n"); - return i; - } + if((err = pci_enable_device(pdev))) + return err; - if (!(i = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) { + if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) && + !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) { pci_using_dac = 1; } else { - if ((i = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) { + if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) || + (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) { IXGB_ERR("No usable DMA configuration, aborting\n"); - return i; + goto err_dma_mask; } pci_using_dac = 0; } - if ((i = pci_request_regions(pdev, ixgb_driver_name))) { - IXGB_ERR("Failed to reserve PCI I/O and Memory resources.\n"); - return i; - } + if((err = pci_request_regions(pdev, ixgb_driver_name))) + goto err_request_regions; pci_set_master(pdev); - /* alloc_etherdev clears the memory for us */ - netdev = alloc_etherdev(sizeof (struct ixgb_adapter)); - if (!netdev) { - IXGB_ERR("Unable to allocate net_device struct\n"); + netdev = alloc_etherdev(sizeof(struct ixgb_adapter)); + if(!netdev) { + err = -ENOMEM; goto err_alloc_etherdev; } @@ -336,7 +384,7 @@ ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) SET_NETDEV_DEV(netdev, &pdev->dev); pci_set_drvdata(pdev, netdev); - adapter = netdev->priv; + adapter = netdev_priv(netdev); adapter->netdev = netdev; adapter->pdev = pdev; adapter->hw.back = adapter; @@ -345,19 +393,19 @@ ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) mmio_len = pci_resource_len(pdev, BAR_0); adapter->hw.hw_addr = ioremap(mmio_start, mmio_len); - if (!adapter->hw.hw_addr) + 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) + for(i = BAR_1; i <= BAR_5; i++) { + if(pci_resource_len(pdev, i) == 0) continue; - if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { + if(pci_resource_flags(pdev, i) & IORESOURCE_IO) { adapter->hw.io_base = pci_resource_start(pdev, i); break; } } - IXGB_DBG("mmio_start<%lx> hw_addr<%p>\n", mmio_start, - adapter->hw.hw_addr); netdev->open = &ixgb_open; netdev->stop = &ixgb_close; @@ -366,94 +414,105 @@ ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) netdev->set_multicast_list = &ixgb_set_multi; netdev->set_mac_address = &ixgb_set_mac; netdev->change_mtu = &ixgb_change_mtu; - netdev->do_ioctl = &ixgb_ioctl; + ixgb_set_ethtool_ops(netdev); netdev->tx_timeout = &ixgb_tx_timeout; netdev->watchdog_timeo = HZ; #ifdef CONFIG_IXGB_NAPI - netdev->poll = &ixgb_poll; + 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->irq = pdev->irq; 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->id_string = ixgb_strings[ent->driver_data]; adapter->link_speed = 0; adapter->link_duplex = 0; /* setup the private structure */ - ixgb_sw_init(adapter); + + 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; + 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) + if(pci_using_dac) netdev->features |= NETIF_F_HIGHDMA; /* make sure the EEPROM is good */ - if (!ixgb_validate_eeprom_checksum(&adapter->hw)) { - IXGB_DBG("Invalid EEPROM checksum.\n"); + 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); + memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len); - if (!is_valid_ether_addr(netdev->dev_addr)) { - IXGB_DBG("Invalid MAC address in EEPROM.\n"); + if(!is_valid_ether_addr(netdev->perm_addr)) { + err = -EIO; goto err_eeprom; } - adapter->max_data_per_txd = IXGB_MAX_JUMBO_FRAME_SIZE; 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; + adapter->watchdog_timer.data = (unsigned long)adapter; INIT_WORK(&adapter->tx_timeout_task, - (void (*)(void *)) ixgb_tx_timeout_task, netdev); + (void (*)(void *))ixgb_tx_timeout_task, netdev); - register_netdev(netdev); - memcpy(adapter->ifname, netdev->name, IFNAMSIZ); - adapter->ifname[IFNAMSIZ - 1] = 0; + 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: %s\n", netdev->name, adapter->id_string); + 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_eeprom: +err_register: +err_sw_init: +err_eeprom: iounmap(adapter->hw.hw_addr); - err_ioremap: - pci_release_regions(pdev); +err_ioremap: free_netdev(netdev); - err_alloc_etherdev: - return -ENOMEM; +err_alloc_etherdev: + pci_release_regions(pdev); +err_request_regions: +err_dma_mask: + pci_disable_device(pdev); + return err; } /** - * ixgb_remove - Device Removal Routine. - * @param pdev PCI device information struct + * 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 @@ -465,45 +524,34 @@ static void __devexit ixgb_remove(struct pci_dev *pdev) { struct net_device *netdev = pci_get_drvdata(pdev); - struct ixgb_adapter *adapter = netdev->priv; - - IXGB_DBG("ixgb_remove\n"); + struct ixgb_adapter *adapter = netdev_priv(netdev); unregister_netdev(netdev); -#ifdef ETHTOOL_IDENTIFY - ixgb_identify_stop(adapter); -#endif - - iounmap((void *) adapter->hw.hw_addr); + iounmap(adapter->hw.hw_addr); pci_release_regions(pdev); free_netdev(netdev); } /** - * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter). - * @param adapter board private structure to initialize + * 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. + * 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 void __devinit +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; - IXGB_DBG("ixgb_sw_init\n"); - /* PCI config space info */ - /* FIXME: do not store, instead directly use struct pci_dev - * where needed - */ hw->vendor_id = pdev->vendor; hw->device_id = pdev->device; hw->subsystem_vendor_id = pdev->subsystem_vendor; @@ -513,8 +561,10 @@ ixgb_sw_init(struct ixgb_adapter *adapter) hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; - if (hw->device_id == IXGB_DEVICE_ID_82597EX) - hw->mac_type = ixgb_82597; + 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"); @@ -524,11 +574,14 @@ ixgb_sw_init(struct ixgb_adapter *adapter) 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. - * @param netdev network interface device structure + * ixgb_open - Called when a network interface is made active + * @netdev: network interface device structure * * Returns 0 on success, negative value on failure * @@ -542,40 +595,37 @@ ixgb_sw_init(struct ixgb_adapter *adapter) static int ixgb_open(struct net_device *netdev) { - struct ixgb_adapter *adapter = netdev->priv; - - IXGB_DBG("ixgb_open\n"); + struct ixgb_adapter *adapter = netdev_priv(netdev); + int err; /* allocate transmit descriptors */ - if (ixgb_setup_tx_resources(adapter)) { - IXGB_DBG("ixgb_open: failed ixgb_setup_tx_resources.\n"); + if((err = ixgb_setup_tx_resources(adapter))) goto err_setup_tx; - } - /* allocate receive descriptors and buffers */ + /* allocate receive descriptors */ - if (ixgb_setup_rx_resources(adapter)) { - IXGB_DBG("ixgb_open: failed ixgb_setup_rx_resources.\n"); + if((err = ixgb_setup_rx_resources(adapter))) goto err_setup_rx; - } - if (ixgb_up(adapter)) + + if((err = ixgb_up(adapter))) goto err_up; return 0; - err_up: +err_up: ixgb_free_rx_resources(adapter); - err_setup_rx: +err_setup_rx: ixgb_free_tx_resources(adapter); - err_setup_tx: +err_setup_tx: ixgb_reset(adapter); - return -EBUSY; + + return err; } /** - * ixgb_close - Disables a network interface. - * @param netdev network interface device structure + * ixgb_close - Disables a network interface + * @netdev: network interface device structure * * Returns 0, this is not allowed to fail * @@ -588,9 +638,7 @@ ixgb_open(struct net_device *netdev) static int ixgb_close(struct net_device *netdev) { - struct ixgb_adapter *adapter = netdev->priv; - - IXGB_DBG("ixgb_close\n"); + struct ixgb_adapter *adapter = netdev_priv(netdev); ixgb_down(adapter, TRUE); @@ -601,43 +649,38 @@ ixgb_close(struct net_device *netdev) } /** - * ixgb_setup_tx_resources - allocate Tx resources (Descriptors). - * @param adapter board private structure + * ixgb_setup_tx_resources - allocate Tx resources (Descriptors) + * @adapter: board private structure * * Return 0 on success, negative on failure **/ -static int +int ixgb_setup_tx_resources(struct ixgb_adapter *adapter) { - struct pci_dev *pdev = adapter->pdev; struct ixgb_desc_ring *txdr = &adapter->tx_ring; + struct pci_dev *pdev = adapter->pdev; int size; - IXGB_DBG("ixgb_setup_tx_resources\n"); - - size = sizeof (struct ixgb_buffer) * txdr->count; - txdr->buffer_info = kmalloc(size, GFP_KERNEL); - if (!txdr->buffer_info) { + 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); + + 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) { - kfree(txdr->buffer_info); + if(!txdr->desc) { + vfree(txdr->buffer_info); return -ENOMEM; } memset(txdr->desc, 0, txdr->size); - IXGB_DBG("txdr->desc <%p>\n", txdr->desc); - IXGB_DBG("txdr->next_to_use = <%p>\n", &txdr->next_to_use); - IXGB_DBG("txdr->next_to_clean = <%p>\n", &txdr->next_to_clean); - txdr->next_to_use = 0; txdr->next_to_clean = 0; @@ -646,7 +689,7 @@ ixgb_setup_tx_resources(struct ixgb_adapter *adapter) /** * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset. - * @adapter board private structure + * @adapter: board private structure * * Configure the Tx unit of the MAC after a reset. **/ @@ -654,13 +697,11 @@ ixgb_setup_tx_resources(struct ixgb_adapter *adapter) static void ixgb_configure_tx(struct ixgb_adapter *adapter) { - u32 tctl; - u32 tdlen = adapter->tx_ring.count * sizeof (struct ixgb_tx_desc); 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; - IXGB_DBG("ixgb_configure_tx\n"); - /* Setup the Base and Length of the Tx Descriptor Ring * tx_ring.dma can be either a 32 or 64 bit value */ @@ -675,14 +716,8 @@ ixgb_configure_tx(struct ixgb_adapter *adapter) IXGB_WRITE_REG(hw, TDH, 0); IXGB_WRITE_REG(hw, TDT, 0); - /* don't set up txdctl, it induces performance problems if - * configured incorrectly - txdctl = TXDCTL_PTHRESH_DEFAULT; // prefetch txds below this threshold - txdctl |= (TXDCTL_HTHRESH_DEFAULT // only prefetch if there are this many ready - << IXGB_TXDCTL_HTHRESH_SHIFT); - IXGB_WRITE_REG (hw, TXDCTL, txdctl); - */ - + /* 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); @@ -694,76 +729,68 @@ ixgb_configure_tx(struct ixgb_adapter *adapter) /* Setup Transmit Descriptor Settings for this adapter */ adapter->tx_cmd_type = - IXGB_TX_DESC_TYPE | IXGB_TX_DESC_CMD_RS - | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0); + IXGB_TX_DESC_TYPE + | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0); } /** - * ixgb_setup_rx_resources - allocate Rx resources (Descriptors). - * @param adapter board private structure - * + * ixgb_setup_rx_resources - allocate Rx resources (Descriptors) + * @adapter: board private structure + * * Returns 0 on success, negative on failure **/ -static int +int ixgb_setup_rx_resources(struct ixgb_adapter *adapter) { - struct pci_dev *pdev = adapter->pdev; struct ixgb_desc_ring *rxdr = &adapter->rx_ring; + struct pci_dev *pdev = adapter->pdev; int size; - IXGB_DBG("ixgb_setup_rx_resources.\n"); - - size = sizeof (struct ixgb_buffer) * rxdr->count; - rxdr->buffer_info = kmalloc(size, GFP_KERNEL); - if (!rxdr->buffer_info) { + 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); + + 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) { - IXGB_DBG("pci_alloc_consistent failed.\n"); - kfree(rxdr->buffer_info); + if(!rxdr->desc) { + vfree(rxdr->buffer_info); return -ENOMEM; } memset(rxdr->desc, 0, rxdr->size); - IXGB_DBG("rxdr->desc <%p>\n", rxdr->desc); - IXGB_DBG("rxdr->next_to_use = <%p>\n", &rxdr->next_to_use); - IXGB_DBG("rxdr->next_to_clean = <%p>\n", &rxdr->next_to_clean); - - rxdr->next_to_use = 0; rxdr->next_to_clean = 0; + rxdr->next_to_use = 0; return 0; } /** - * ixgb_setup_rctl - configure the receive control register. - * @param adapter Board private structure + * ixgb_setup_rctl - configure the receive control register + * @adapter: Board private structure **/ static void ixgb_setup_rctl(struct ixgb_adapter *adapter) { - u32 rctl; + uint32_t rctl; rctl = IXGB_READ_REG(&adapter->hw, RCTL); - IXGB_DBG("ixgb_setup_rctl\n"); - 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); + 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; @@ -782,12 +809,13 @@ ixgb_setup_rctl(struct ixgb_adapter *adapter) rctl |= IXGB_RCTL_BSIZE_16384; break; } + IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); } /** * ixgb_configure_rx - Configure 82597 Receive Unit after Reset. - * @param adapter board private structure + * @adapter: board private structure * * Configure the Rx unit of the MAC after a reset. **/ @@ -796,21 +824,23 @@ static void ixgb_configure_rx(struct ixgb_adapter *adapter) { uint64_t rdba = adapter->rx_ring.dma; - u32 rdlen = adapter->rx_ring.count * sizeof (struct ixgb_rx_desc); + uint32_t rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc); struct ixgb_hw *hw = &adapter->hw; - u32 rctl; - u32 rxcsum; - - IXGB_DBG("ixgb_configure_rx\n"); + 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)); @@ -820,54 +850,21 @@ ixgb_configure_rx(struct ixgb_adapter *adapter) IXGB_WRITE_REG(hw, RDH, 0); IXGB_WRITE_REG(hw, RDT, 0); - { - u32 rxdctl; - /* burst 16 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); - } - - if (adapter->raidc) { - u32 raidc; - u8 poll_threshold; - - /* Poll every rx_int_delay period, if RBD exists - * Receive Backlog Detection is set to - * Rx Descriptors - * max is 0x3F == set to poll when 504 RxDesc left - * min is 0 */ - - /* polling times are 1 == 0.8192us - 2 == 1.6384us - 3 == 3.2768us etc - ... - 511 == 418 us - */ -#define IXGB_RAIDC_POLL_DEFAULT 122 /* set to poll every ~100 us under load - also known as 10000 interrupts / sec */ - - /* divide this by 2^3 (8) to get a register size count */ - poll_threshold = ((adapter->rx_ring.count - 1) >> 3); - /* poll at half of that size */ - poll_threshold >>= 1; - /* make sure its not bigger than our max */ - poll_threshold &= 0x3F; - - raidc = IXGB_RAIDC_EN | /* turn on raidc style moderation */ - IXGB_RAIDC_RXT_GATE | /* don't interrupt with rxt0 while - in RBD mode (polling) */ - (IXGB_RAIDC_POLL_DEFAULT << IXGB_RAIDC_POLL_SHIFT) | - /* this sets the regular "min interrupt delay" */ - (adapter->rx_int_delay << IXGB_RAIDC_DELAY_SHIFT) | - poll_threshold; - - IXGB_WRITE_REG(hw, RAIDC, raidc); - } + /* 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) { + if(adapter->rx_csum == TRUE) { rxcsum = IXGB_READ_REG(hw, RXCSUM); rxcsum |= IXGB_RXCSUM_TUOFL; IXGB_WRITE_REG(hw, RXCSUM, rxcsum); @@ -879,204 +876,232 @@ ixgb_configure_rx(struct ixgb_adapter *adapter) } /** - * ixgb_free_tx_resources - Free Tx Resources. - * @param adapter board private structure + * ixgb_free_tx_resources - Free Tx Resources + * @adapter: board private structure * * Free all transmit software resources **/ -static void +void ixgb_free_tx_resources(struct ixgb_adapter *adapter) { struct pci_dev *pdev = adapter->pdev; - IXGB_DBG("ixgb_free_tx_resources\n"); - ixgb_clean_tx_ring(adapter); - kfree(adapter->tx_ring.buffer_info); + 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); + 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. - * @param adapter board private structure + * ixgb_clean_tx_ring - Free Tx Buffers + * @adapter: board private structure **/ static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter) { - struct pci_dev *pdev = adapter->pdev; + struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; + struct ixgb_buffer *buffer_info; unsigned long size; - int i; - - IXGB_DBG("ixgb_clean_tx_ring\n"); + unsigned int i; /* Free all the Tx ring sk_buffs */ - for (i = 0; i < adapter->tx_ring.count; i++) { - if (adapter->tx_ring.buffer_info[i].skb) { - - pci_unmap_page(pdev, - adapter->tx_ring.buffer_info[i].dma, - adapter->tx_ring.buffer_info[i].length, - PCI_DMA_TODEVICE); - - dev_kfree_skb(adapter->tx_ring.buffer_info[i].skb); - - adapter->tx_ring.buffer_info[i].skb = NULL; - } + 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) * adapter->tx_ring.count; - memset(adapter->tx_ring.buffer_info, 0, size); + size = sizeof(struct ixgb_buffer) * tx_ring->count; + memset(tx_ring->buffer_info, 0, size); /* Zero out the descriptor ring */ - memset(adapter->tx_ring.desc, 0, adapter->tx_ring.size); + memset(tx_ring->desc, 0, tx_ring->size); - adapter->tx_ring.next_to_use = 0; - adapter->tx_ring.next_to_clean = 0; + 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. - * @param adapter board private structure + * ixgb_free_rx_resources - Free Rx Resources + * @adapter: board private structure * * Free all receive software resources **/ -static void +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_DBG("ixgb_free_rx_resources\n"); - ixgb_clean_rx_ring(adapter); - kfree(adapter->rx_ring.buffer_info); - adapter->rx_ring.buffer_info = NULL; + vfree(rx_ring->buffer_info); + rx_ring->buffer_info = NULL; - pci_free_consistent(pdev, adapter->rx_ring.size, - adapter->rx_ring.desc, adapter->rx_ring.dma); + pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma); - adapter->rx_ring.desc = NULL; + rx_ring->desc = NULL; } /** - * ixgb_clean_rx_ring - Free Rx Buffers. - * @param adapter board private structure + * 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; - int i; - - IXGB_DBG("ixgb_free_rx_ring\n"); + unsigned int i; /* Free all the Rx ring sk_buffs */ - for (i = 0; i < adapter->rx_ring.count; i++) { - if (adapter->rx_ring.buffer_info[i].skb) { + for(i = 0; i < rx_ring->count; i++) { + buffer_info = &rx_ring->buffer_info[i]; + if(buffer_info->skb) { pci_unmap_single(pdev, - adapter->rx_ring.buffer_info[i].dma, - adapter->rx_ring.buffer_info[i].length, + buffer_info->dma, + buffer_info->length, PCI_DMA_FROMDEVICE); - dev_kfree_skb(adapter->rx_ring.buffer_info[i].skb); + dev_kfree_skb(buffer_info->skb); - adapter->rx_ring.buffer_info[i].skb = NULL; + buffer_info->skb = NULL; } } - size = sizeof (struct ixgb_buffer) * adapter->rx_ring.count; - memset(adapter->rx_ring.buffer_info, 0, size); + size = sizeof(struct ixgb_buffer) * rx_ring->count; + memset(rx_ring->buffer_info, 0, size); /* Zero out the descriptor ring */ - memset(adapter->rx_ring.desc, 0, adapter->rx_ring.size); + memset(rx_ring->desc, 0, rx_ring->size); - adapter->rx_ring.next_to_clean = 0; - adapter->rx_ring.next_to_use = 0; + 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_multi - Multicast and Promiscuous mode set. - * @param netdev network interface device structure + * 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 - * resposible for configuring the hardware for proper multicast, + * responsible for configuring the hardware for proper multicast, * promiscuous mode, and all-multi behavior. **/ -void +static void ixgb_set_multi(struct net_device *netdev) { - struct ixgb_adapter *adapter = netdev->priv; + struct ixgb_adapter *adapter = netdev_priv(netdev); struct ixgb_hw *hw = &adapter->hw; - u32 rctl; - int i; struct dev_mc_list *mc_ptr; - - IXGB_DBG("ixgb_set_multi <%x>\n", netdev->flags); + uint32_t rctl; + int i; /* Check for Promiscuous and All Multicast modes */ - rctl = IXGB_READ_REG(&adapter->hw, RCTL); + rctl = IXGB_READ_REG(hw, RCTL); - if (netdev->flags & IFF_PROMISC) { + if(netdev->flags & IFF_PROMISC) { rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE); - } else if (netdev->flags & IFF_ALLMULTI) { + } 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) { + if(netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) { rctl |= IXGB_RCTL_MPE; IXGB_WRITE_REG(hw, RCTL, rctl); } else { - u8 mta[netdev->mc_count * IXGB_ETH_LENGTH_OF_ADDRESS]; + 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) + 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); + 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. - * @param data pointer to adapter cast into an unsigned long + * ixgb_watchdog - Timer Call-back + * @data: pointer to netdev cast into an unsigned long **/ -void +static void ixgb_watchdog(unsigned long data) { - struct ixgb_adapter *adapter = (struct ixgb_adapter *) 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); @@ -1085,47 +1110,43 @@ ixgb_watchdog(unsigned long data) netif_stop_queue(netdev); } - if (adapter->hw.link_up) { - if (!netif_carrier_ok(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"); + 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)) { - printk(KERN_INFO "ixgb: %s NIC Link is Down\n", - netdev->name); + 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_down(adapter, FALSE); - ixgb_up(adapter); } } ixgb_update_stats(adapter); - /* Early detection of hung controller */ - { - struct ixgb_desc_ring *txdr = &adapter->tx_ring; - int i = txdr->next_to_clean; - - if (txdr->buffer_info[i].dma && - time_after(jiffies, txdr->buffer_info[i].time_stamp + HZ) && - !(IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_TXOFF)) - { - IXGB_DBG - ("ixgb: %s Hung controller? Watchdog stopping queue\n", - netdev->name); - netif_stop_queue(netdev); + 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); @@ -1133,26 +1154,27 @@ ixgb_watchdog(unsigned long data) 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 +#define IXGB_TX_FLAGS_CSUM 0x00000001 +#define IXGB_TX_FLAGS_VLAN 0x00000002 +#define IXGB_TX_FLAGS_TSO 0x00000004 -/** Transmit Segmentation offload setup. - * ixgb_tso - (Large Send) setup where the initial descriptor is prepared - * @param adapter adapter specific information - * @param skb the skb we are trying to set up for segmentation - **/ - -static inline boolean_t +static inline int ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb) { #ifdef NETIF_F_TSO struct ixgb_context_desc *context_desc; - int i; - u8 ipcss, ipcso, tucss, tucso, hdr_len; - u16 ipcse, tucse, mss; + 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; + } - if (likely(skb_shinfo(skb)->tso_size)) { hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2)); mss = skb_shinfo(skb)->tso_size; skb->nh.iph->tot_len = 0; @@ -1161,10 +1183,10 @@ ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb) skb->nh.iph->daddr, 0, IPPROTO_TCP, 0); ipcss = skb->nh.raw - skb->data; - ipcso = (void *) &(skb->nh.iph->check) - (void *) 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; + tucso = (void *)&(skb->h.th->check) - (void *)skb->data; tucse = 0; i = adapter->tx_ring.next_to_use; @@ -1179,46 +1201,36 @@ ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb) 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_RS - | - IXGB_CONTEXT_DESC_CMD_IDE - | (skb->len - - (hdr_len))); - - i = (i + 1) % adapter->tx_ring.count; + 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 TRUE; + return 1; } #endif - return FALSE; + + return 0; } -/** - * ixgb_tx_csum - prepare context descriptor for checksum offload. - * - * ixgb_tx_csum is called to prepare for checksumming a packet in hw. - * @param adapter board private structure - * @param skb structure containing data to send - **/ static inline boolean_t ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb) { struct ixgb_context_desc *context_desc; - int i; - u8 css, cso; + unsigned int i; + uint8_t css, cso; - if (likely(skb->ip_summed == CHECKSUM_HW)) { + 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); @@ -1226,15 +1238,15 @@ ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb) context_desc->tucso = cso; context_desc->tucse = 0; /* zero out any previously existing data in one instruction */ - *(u32 *) & (context_desc->ipcss) = 0; + *(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_RS | IXGB_TX_DESC_CMD_IDE); + cpu_to_le32(IXGB_CONTEXT_DESC_TYPE + | IXGB_TX_DESC_CMD_IDE); - i = (i + 1) % adapter->tx_ring.count; + if(++i == adapter->tx_ring.count) i = 0; adapter->tx_ring.next_to_use = i; return TRUE; @@ -1243,116 +1255,114 @@ ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb) return FALSE; } -/** - * ixgb_tx_map - private function for mapping send data to hardware addresses. - * - * @param adapter board private structure - * @param skb structure containing data to send - **/ +#define IXGB_MAX_TXD_PWR 14 +#define IXGB_MAX_DATA_PER_TXD (1<tx_ring; - int len, offset, count, size, i; - - int f; - len = skb->len - skb->data_len; + struct ixgb_buffer *buffer_info; + int len = skb->len; + unsigned int offset = 0, size, count = 0, i; - i = (tx_ring->next_to_use + tx_ring->count - 1) % tx_ring->count; - count = 0; + unsigned int nr_frags = skb_shinfo(skb)->nr_frags; + unsigned int f; - offset = 0; + len -= skb->data_len; - while (len) { - i = (i + 1) % tx_ring->count; - size = min(len, adapter->max_data_per_txd); - tx_ring->buffer_info[i].length = size; - tx_ring->buffer_info[i].dma = - pci_map_single(adapter->pdev, skb->data + offset, size, - PCI_DMA_TODEVICE); + i = tx_ring->next_to_use; - tx_ring->buffer_info[i].time_stamp = jiffies; + 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 < skb_shinfo(skb)->nr_frags; f++) { + 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) { - i = (i + 1) % tx_ring->count; - size = min(len, adapter->max_data_per_txd); - tx_ring->buffer_info[i].length = size; - tx_ring->buffer_info[i].dma = - pci_map_page(adapter->pdev, frag->page, - frag->page_offset + offset, size, - PCI_DMA_TODEVICE); + 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; - tx_ring->buffer_info[i].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; } -/** - * ixgb_tx_queue - private function to start transmit on hardware. - * - * @param adapter board private structure - * @param count number of tx_descriptors to initialize (consume) - * @param vlan_id the vlan tag to insert (if necessary) - * @param tx_flags special handling for this transmit, if any - **/ - static inline void -ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id, - int tx_flags) +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; - u32 cmd_type_len = adapter->tx_cmd_type; - u8 status = 0; - u8 popts = 0; - int i; + 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) { + 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) + if(tx_flags & IXGB_TX_FLAGS_CSUM) popts |= IXGB_TX_DESC_POPTS_TXSM; - if (tx_flags & IXGB_TX_FLAGS_VLAN) { + if(tx_flags & IXGB_TX_FLAGS_VLAN) { cmd_type_len |= IXGB_TX_DESC_CMD_VLE; } i = tx_ring->next_to_use; - while (count--) { + while(count--) { + buffer_info = &tx_ring->buffer_info[i]; tx_desc = IXGB_TX_DESC(*tx_ring, i); - tx_desc->buff_addr = cpu_to_le64(tx_ring->buffer_info[i].dma); + tx_desc->buff_addr = cpu_to_le64(buffer_info->dma); tx_desc->cmd_type_len = - cpu_to_le32(cmd_type_len | tx_ring->buffer_info[i].length); + 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); - i = (i + 1) % tx_ring->count; + if(++i == tx_ring->count) i = 0; } - tx_desc->cmd_type_len |= cpu_to_le32(IXGB_TX_DESC_CMD_EOP); + 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 @@ -1364,104 +1374,87 @@ ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id, IXGB_WRITE_REG(&adapter->hw, TDT, i); } -#define TXD_USE_COUNT(S, X) (((S) / (X)) + (((S) % (X)) ? 1 : 0)) - -/** - * ixgb_xmit_frame - hard_start_xmit linked function, transmit entry point. - * - * ixgb_xmit_frame is called to send an skb on the wire. - * @param skb contains data to send - * @param netdev network interface device structure - **/ +/* 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; + struct ixgb_adapter *adapter = netdev_priv(netdev); + unsigned int first; + unsigned int tx_flags = 0; + unsigned long flags; int vlan_id = 0; - int tx_flags = 0, count; - int f; + int tso; - count = - TXD_USE_COUNT(skb->len - skb->data_len, adapter->max_data_per_txd); - - if (count == 0) { + if(skb->len <= 0) { dev_kfree_skb_any(skb); return 0; } - for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) - count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size, - adapter->max_data_per_txd); -#ifdef NETIF_F_TSO - if ((skb_shinfo(skb)->tso_size) || (skb->ip_summed == CHECKSUM_HW)) - count++; -#else - if (skb->ip_summed == CHECKSUM_HW) - count++; -#endif - - if (unlikely(IXGB_DESC_UNUSED(&adapter->tx_ring) < count)) { + 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)) { + if(adapter->vlgrp && vlan_tx_tag_present(skb)) { tx_flags |= IXGB_TX_FLAGS_VLAN; vlan_id = vlan_tx_tag_get(skb); } - if (ixgb_tso(adapter, 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)) + else if(ixgb_tx_csum(adapter, skb)) tx_flags |= IXGB_TX_FLAGS_CSUM; - count = ixgb_tx_map(adapter, skb); - ixgb_tx_queue(adapter, count, vlan_id, tx_flags); + 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 by resetting the adapter. - * @param netdev network interface device structure + * 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; - - IXGB_DBG("ixgb_tx_timeout\n"); + struct ixgb_adapter *adapter = netdev_priv(netdev); /* Do the reset outside of interrupt context */ schedule_work(&adapter->tx_timeout_task); } -/** - * ixgb_tx_timeout_task - worker function to reset hardware and dump queues. - * This function is pointed to by adapter->tx_timeout_task - * - * @param netdev network interface device structure - **/ - static void ixgb_tx_timeout_task(struct net_device *netdev) { - struct ixgb_adapter *adapter = netdev->priv; - - IXGB_DBG("ixgb_tx_timeout_task\n"); + struct ixgb_adapter *adapter = netdev_priv(netdev); - netif_device_detach(netdev); ixgb_down(adapter, TRUE); ixgb_up(adapter); - netif_device_attach(netdev); } /** - * ixgb_get_stats - Get System Network Statistics. - * @param netdev network interface device structure + * 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. @@ -1470,15 +1463,15 @@ ixgb_tx_timeout_task(struct net_device *netdev) static struct net_device_stats * ixgb_get_stats(struct net_device *netdev) { - struct ixgb_adapter *adapter = netdev->priv; + struct ixgb_adapter *adapter = netdev_priv(netdev); return &adapter->net_stats; } /** - * ixgb_change_mtu - Change the Maximum Transfer Unit. - * @param netdev network interface device structure - * @param new_mtu new value for maximum frame size + * 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 **/ @@ -1486,105 +1479,78 @@ ixgb_get_stats(struct net_device *netdev) static int ixgb_change_mtu(struct net_device *netdev, int new_mtu) { - struct ixgb_adapter *adapter = netdev->priv; - u32 old_mtu = adapter->rx_buffer_len; + 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; - IXGB_DBG("ixgb_change_mtu\n"); - if ((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) - || (max_frame > IXGB_MAX_JUMBO_FRAME_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)) { + 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) { + } else if(max_frame <= IXGB_RXBUFFER_4096) { adapter->rx_buffer_len = IXGB_RXBUFFER_4096; - } else if (max_frame <= IXGB_RXBUFFER_8192) { + } else if(max_frame <= IXGB_RXBUFFER_8192) { adapter->rx_buffer_len = IXGB_RXBUFFER_8192; } else { adapter->rx_buffer_len = IXGB_RXBUFFER_16384; } - if (old_mtu != adapter->rx_buffer_len && netif_running(netdev)) { + netdev->mtu = new_mtu; + + if(old_max_frame != max_frame && netif_running(netdev)) { ixgb_down(adapter, TRUE); ixgb_up(adapter); } - if (adapter->hw.max_frame_size != max_frame) { - struct ixgb_hw *hw = &adapter->hw; - - adapter->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) { - u32 ctrl0 = IXGB_READ_REG(hw, CTRL0); - - if (!(ctrl0 & IXGB_CTRL0_JFE)) { - ctrl0 |= IXGB_CTRL0_JFE; - IXGB_WRITE_REG(hw, CTRL0, ctrl0); - } - } - - printk(KERN_ERR "%s: ixgb_change_mtu MFS is set to <%x>\n", - adapter->netdev->name, - (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT)); - } - - netdev->mtu = new_mtu; - - return 0; -} - -/** - * ixgb_set_mac - Change the Ethernet Address of the NIC. - * @param netdev network interface device structure - * @param 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; - struct sockaddr *addr = (struct sockaddr *) p; - - IXGB_DBG("ixgb_set_mac\n"); - - memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); - - ixgb_rar_set(&adapter->hw, addr->sa_data, 0); - return 0; } /** * ixgb_update_stats - Update the board statistics counters. - * @param adapter board private structure + * @adapter: board private structure **/ -static void +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 */ + if(multi >= bcast) + 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.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL); - adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH); - adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL); - adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH); 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); @@ -1656,8 +1622,6 @@ ixgb_update_stats(struct ixgb_adapter *adapter) 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; */ @@ -1676,326 +1640,257 @@ ixgb_update_stats(struct ixgb_adapter *adapter) adapter->net_stats.tx_window_errors = 0; } -/** - * ixgb_irq_disable - Mask off interrupt generation on the NIC - * @param adapter board private structure - **/ - -static inline void -ixgb_irq_disable(struct ixgb_adapter *adapter) -{ - IXGB_DBG("ixgb_irq_disable\n"); - - atomic_inc(&adapter->irq_sem); - IXGB_WRITE_REG(&adapter->hw, IMC, ~0); - synchronize_irq(adapter->netdev->irq); -} - -/** - * ixgb_irq_enable - Enable default interrupt generation settings. - * @param adapter board private structure - **/ - -static inline void -ixgb_irq_enable(struct ixgb_adapter *adapter) -{ - IXGB_DBG("ixgb_irq_enable\n"); - - 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_RXO | IXGB_INT_LSC); - } -} - #define IXGB_MAX_INTR 10 /** - * ixgb_intr - Interrupt Handler. - * @param irq interrupt number - * @param data pointer to a network interface device structure - * @param regs CPU registers structure + * 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 = (struct net_device *) data; - struct ixgb_adapter *adapter = netdev->priv; -#ifdef CONFIG_IXGB_NAPI - if (netif_rx_schedule_prep(netdev)) { - ixgb_irq_disable(adapter); - __netif_rx_schedule(netdev); - } - - return IRQ_HANDLED; /* FIXME: check for shared interrupts */ -#else + struct net_device *netdev = data; + struct ixgb_adapter *adapter = netdev_priv(netdev); struct ixgb_hw *hw = &adapter->hw; - u32 icr; - uint i = IXGB_MAX_INTR; - boolean_t rxdmt0 = FALSE; - int handled = 0; - - while (i && (icr = IXGB_READ_REG(hw, ICR))) { - handled = 1; + uint32_t icr = IXGB_READ_REG(hw, ICR); +#ifndef CONFIG_IXGB_NAPI + unsigned int i; +#endif - if (icr & IXGB_INT_RXDMT0) - rxdmt0 = TRUE; + if(unlikely(!icr)) + return IRQ_NONE; /* Not our interrupt */ - if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) { - mod_timer(&adapter->watchdog_timer, jiffies); - } + if(unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) { + mod_timer(&adapter->watchdog_timer, jiffies); + } - /* adapter->generate_int = 0; */ - ixgb_clean_rx_irq(adapter); - ixgb_clean_tx_irq(adapter); +#ifdef CONFIG_IXGB_NAPI + if(netif_rx_schedule_prep(netdev)) { - i--; - } + /* Disable interrupts and register for poll. The flush + of the posted write is intentionally left out. + */ - /* if RAIDC:EN == 1 and ICR:RXDMT0 == 1, we need to - * set IMS:RXDMT0 to 1 to restart the RBD timer (POLL) - */ - if (rxdmt0 && adapter->raidc) { - /* ready the timer by writing the clear reg */ - IXGB_WRITE_REG(hw, IMC, IXGB_INT_RXDMT0); - /* now restart it, h/w will decide if its necessary */ - IXGB_WRITE_REG(hw, IMS, IXGB_INT_RXDMT0); + atomic_inc(&adapter->irq_sem); + IXGB_WRITE_REG(&adapter->hw, IMC, ~0); + __netif_rx_schedule(netdev); } - - return IRQ_RETVAL(handled); -#endif // NAPI else +#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_process_intr(struct net_device *netdev) +ixgb_clean(struct net_device *netdev, int *budget) { - struct ixgb_adapter *adapter = netdev->priv; - u32 icr; - int i = IXGB_MAX_INTR; - int hasReceived = 0; + struct ixgb_adapter *adapter = netdev_priv(netdev); + int work_to_do = min(*budget, netdev->quota); + int tx_cleaned; + int work_done = 0; - while (i && (icr = IXGB_READ_REG(&adapter->hw, ICR))) { - if (icr & IXGB_INT_RXT0) - hasReceived = 1; + tx_cleaned = ixgb_clean_tx_irq(adapter); + ixgb_clean_rx_irq(adapter, &work_done, work_to_do); - if (!(icr & ~(IXGB_INT_RXT0))) - break; - - if (icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)) { - mod_timer(&adapter->watchdog_timer, jiffies); - } + *budget -= work_done; + netdev->quota -= work_done; - ixgb_clean_tx_irq(adapter); - i--; + /* 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 hasReceived; + return 1; } - #endif + /** - * ixgb_clean_tx_irq - Reclaim resources after transmit completes. - * @param adapter board private structure + * ixgb_clean_tx_irq - Reclaim resources after transmit completes + * @adapter: board private structure **/ -static void +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 pci_dev *pdev = adapter->pdev; - int i = adapter->tx_ring.next_to_clean; - struct ixgb_tx_desc *tx_desc = IXGB_TX_DESC(*tx_ring, i); - while ((tx_desc->status & IXGB_TX_DESC_STATUS_DD)) { - if (tx_desc->popts - & (IXGB_TX_DESC_POPTS_TXSM | IXGB_TX_DESC_POPTS_IXSM)) - adapter->hw_csum_tx_good++; - - if (tx_ring->buffer_info[i].dma) { - pci_unmap_page(pdev, tx_ring->buffer_info[i].dma, - tx_ring->buffer_info[i].length, - PCI_DMA_TODEVICE); - tx_ring->buffer_info[i].dma = 0; - } - - if (tx_ring->buffer_info[i].skb) { - dev_kfree_skb_any(tx_ring->buffer_info[i].skb); - tx_ring->buffer_info[i].skb = NULL; - } - - *(u32 *) & (tx_desc->status) = 0; - - i = (i + 1) % tx_ring->count; - tx_desc = IXGB_TX_DESC(*tx_ring, i); - } - - tx_ring->next_to_clean = i; - - if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev) && - (IXGB_DESC_UNUSED(tx_ring) > IXGB_TX_QUEUE_WAKE)) { - - netif_wake_queue(netdev); - } -} - -#ifdef CONFIG_IXGB_NAPI -static int -ixgb_poll(struct net_device *netdev, int *budget) -{ - struct ixgb_adapter *adapter = netdev->priv; - struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; - struct pci_dev *pdev = adapter->pdev; - struct ixgb_rx_desc *rx_desc; - struct sk_buff *skb; - u32 length; - int i; - int received = 0; - int rx_work_limit = *budget; - - if (rx_work_limit > netdev->quota) - rx_work_limit = netdev->quota; - - ixgb_process_intr(netdev); - - i = rx_ring->next_to_clean; - rx_desc = IXGB_RX_DESC(*rx_ring, i); - - while ((rx_desc->status & IXGB_RX_DESC_STATUS_DD)) { - if (--rx_work_limit < 0) - goto not_done; - - pci_unmap_single(pdev, - rx_ring->buffer_info[i].dma, - rx_ring->buffer_info[i].length, - PCI_DMA_FROMDEVICE); - - skb = rx_ring->buffer_info[i].skb; - length = le16_to_cpu(rx_desc->length); - - if (!(rx_desc->status & IXGB_RX_DESC_STATUS_EOP)) { - - /* All receives must fit into a single buffer */ - - IXGB_DBG("Receive packet consumed multiple buffers\n"); - - dev_kfree_skb_irq(skb); - rx_desc->status = 0; - rx_ring->buffer_info[i].skb = NULL; - - i = (i + 1) % rx_ring->count; + struct ixgb_tx_desc *tx_desc, *eop_desc; + struct ixgb_buffer *buffer_info; + unsigned int i, eop; + boolean_t cleaned = FALSE; - rx_desc = IXGB_RX_DESC(*rx_ring, i); - continue; - } + i = tx_ring->next_to_clean; + eop = tx_ring->buffer_info[i].next_to_watch; + eop_desc = IXGB_TX_DESC(*tx_ring, eop); - if (rx_desc-> - errors & (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE | - IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE)) - { + while(eop_desc->status & IXGB_TX_DESC_STATUS_DD) { - IXGB_DBG("Receive Errors Reported by Hardware-%x.\n", - rx_desc->errors); + for(cleaned = FALSE; !cleaned; ) { + tx_desc = IXGB_TX_DESC(*tx_ring, i); + buffer_info = &tx_ring->buffer_info[i]; - dev_kfree_skb_irq(skb); - rx_desc->status = 0; - rx_ring->buffer_info[i].skb = NULL; - i = (i + 1) % rx_ring->count; - rx_desc = IXGB_RX_DESC(*rx_ring, i); - continue; - } + if (tx_desc->popts + & (IXGB_TX_DESC_POPTS_TXSM | + IXGB_TX_DESC_POPTS_IXSM)) + adapter->hw_csum_tx_good++; - /* Good Receive */ - skb_put(skb, length); + ixgb_unmap_and_free_tx_resource(adapter, buffer_info); - /* Receive Checksum Offload */ - ixgb_rx_checksum(adapter, rx_desc, skb); + *(uint32_t *)&(tx_desc->status) = 0; - skb->protocol = eth_type_trans(skb, netdev); - if (adapter->vlgrp - && (rx_desc->status & IXGB_RX_DESC_STATUS_VP)) { - vlan_hwaccel_receive_skb(skb, adapter->vlgrp, - (rx_desc-> special & IXGB_RX_DESC_SPECIAL_VLAN_MASK)); - } else { - netif_receive_skb(skb); + cleaned = (i == eop); + if(++i == tx_ring->count) i = 0; } - netdev->last_rx = jiffies; - rx_desc->status = 0; - rx_ring->buffer_info[i].skb = NULL; - - i = (i + 1) % rx_ring->count; - - rx_desc = IXGB_RX_DESC(*rx_ring, i); - received++; + eop = tx_ring->buffer_info[i].next_to_watch; + eop_desc = IXGB_TX_DESC(*tx_ring, eop); } - if (!received) - received = 1; - - ixgb_alloc_rx_buffers(adapter); - - rx_ring->next_to_clean = i; - netdev->quota -= received; - *budget -= received; + tx_ring->next_to_clean = i; - netif_rx_complete(netdev); + spin_lock(&adapter->tx_lock); + if(cleaned && netif_queue_stopped(netdev) && netif_carrier_ok(netdev) && + (IXGB_DESC_UNUSED(tx_ring) > IXGB_TX_QUEUE_WAKE)) { - /* NOTE: RAIDC will be automatically restarted by this enable */ - ixgb_irq_enable(adapter); - return 0; + 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); + } - not_done: + return cleaned; +} - ixgb_alloc_rx_buffers(adapter); +/** + * ixgb_rx_checksum - Receive Checksum Offload for 82597. + * @adapter: board private structure + * @rx_desc: receive descriptor + * @sk_buff: socket buffer with received data + **/ - rx_ring->next_to_clean = i; - netdev->quota -= received; - *budget -= received; +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; + } - return 1; + /* 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++; + } } -#else + /** - * ixgb_clean_rx_irq - Send received data up the network stack. - * @param adapter board private structure + * ixgb_clean_rx_irq - Send received data up the network stack, + * @adapter: board private structure **/ -static void +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; - struct sk_buff *skb; - u32 length; - int i; + 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); - while ((rx_desc->status & IXGB_RX_DESC_STATUS_DD)) { - pci_unmap_single(pdev, rx_ring->buffer_info[i].dma, - rx_ring->buffer_info[i].length, + 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); - skb = rx_ring->buffer_info[i].skb; length = le16_to_cpu(rx_desc->length); - if (unlikely(!(rx_desc->status & IXGB_RX_DESC_STATUS_EOP))) { + 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); + "length<%x>\n", length); dev_kfree_skb_irq(skb); - rx_desc->status = 0; - rx_ring->buffer_info[i].skb = NULL; - i = (i + 1) % rx_ring->count; - rx_desc = IXGB_RX_DESC(*rx_ring, i); - continue; + goto rxdesc_done; } if (unlikely(rx_desc->errors @@ -2003,15 +1898,8 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter) | IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) { - IXGB_DBG("Receive Errors Reported by Hardware-%x.\n", - rx_desc->errors); - dev_kfree_skb_irq(skb); - rx_desc->status = 0; - rx_ring->buffer_info[i].skb = NULL; - i = (i + 1) % rx_ring->count; - rx_desc = IXGB_RX_DESC(*rx_ring, i); - continue; + goto rxdesc_done; } /* Good Receive */ @@ -2021,35 +1909,45 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter) ixgb_rx_checksum(adapter, rx_desc, skb); skb->protocol = eth_type_trans(skb, netdev); - if (adapter->vlgrp - && (rx_desc->status & IXGB_RX_DESC_STATUS_VP)) { +#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, - (rx_desc-> - special & - IXGB_RX_DESC_SPECIAL_VLAN_MASK)); + 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; - rx_ring->buffer_info[i].skb = NULL; - i = (i + 1) % rx_ring->count; - - rx_desc = IXGB_RX_DESC(*rx_ring, i); - } /* while */ + /* use prefetched values */ + rx_desc = next_rxd; + buffer_info = next_buffer; + } rx_ring->next_to_clean = i; ixgb_alloc_rx_buffers(adapter); + + return cleaned; } -#endif /** - * ixgb_alloc_rx_buffers - Replace used receive buffers. - * @param adapter address of board private structure + * ixgb_alloc_rx_buffers - Replace used receive buffers + * @adapter: address of board private structure **/ static void @@ -2059,86 +1957,66 @@ ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter) 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; - int reserve_len; - int i; + unsigned int i; int num_group_tail_writes; long cleancount; - reserve_len = 2; - i = rx_ring->next_to_use; + buffer_info = &rx_ring->buffer_info[i]; cleancount = IXGB_DESC_UNUSED(rx_ring); - /* lessen this to 4 if we're - * in the midst of raidc and rbd is occuring - * because we don't want to delay returning buffers when low - */ - num_group_tail_writes = adapter->raidc ? 4 : IXGB_RX_BUFFER_WRITE; + num_group_tail_writes = IXGB_RX_BUFFER_WRITE; - /* leave one descriptor unused */ - while (--cleancount > 0) { + /* leave three descriptors unused */ + while(--cleancount > 2) { rx_desc = IXGB_RX_DESC(*rx_ring, i); - /* allocate a new one */ - skb = dev_alloc_skb(adapter->rx_buffer_len + reserve_len); + skb = dev_alloc_skb(adapter->rx_buffer_len + NET_IP_ALIGN); - if (unlikely(!skb)) { - /* better luck next time around */ - IXGB_DBG("Could not allocate SKB\n"); + 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, reserve_len); + skb_reserve(skb, NET_IP_ALIGN); skb->dev = netdev; - rx_ring->buffer_info[i].skb = skb; - rx_ring->buffer_info[i].length = adapter->rx_buffer_len; - rx_ring->buffer_info[i].dma = - pci_map_single(pdev, skb->data, adapter->rx_buffer_len, + 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(rx_ring->buffer_info[i].dma); + 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)) { + 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(); - /* move tail */ + IXGB_WRITE_REG(&adapter->hw, RDT, i); } - i = (i + 1) % rx_ring->count; - } - - rx_ring->next_to_use = i; -} - -/** - * ixgb_ioctl - perform a command - e.g: ethtool:get_driver_info. - * @param netdev network interface device structure - * @param ifr data to be used/filled in by the ioctl command - * @param cmd ioctl command to execute - **/ -int -ixgb_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) -{ - - switch (cmd) { - case SIOCETHTOOL: - return ixgb_ethtool_ioctl(netdev, ifr); - - default: - return -EOPNOTSUPP; + if(++i == rx_ring->count) i = 0; + buffer_info = &rx_ring->buffer_info[i]; } - return 0; + rx_ring->next_to_use = i; } /** @@ -2147,34 +2025,36 @@ ixgb_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) * @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; - u32 ctrl, rctl; + struct ixgb_adapter *adapter = netdev_priv(netdev); + uint32_t ctrl, rctl; ixgb_irq_disable(adapter); adapter->vlgrp = grp; - if (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); @@ -2183,17 +2063,11 @@ ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp) ixgb_irq_enable(adapter); } -/** - * ixgb_vlan_rx_add_vid - adds a vlan id to be tagged/stripped in packet data. - * @param netdev network interface device structure - * @param vid the vlan to be added - **/ - static void -ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid) +ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid) { - struct ixgb_adapter *adapter = netdev->priv; - u32 vfta, index; + struct ixgb_adapter *adapter = netdev_priv(netdev); + uint32_t vfta, index; /* add VID to filter table */ @@ -2203,26 +2077,20 @@ ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid) ixgb_write_vfta(&adapter->hw, index, vfta); } -/** - * ixgb_vlan_rx_kill_vid - removes a vlan id from tag/strip tables. - * @param netdev network interface device structure - * @param vid the vlan to be deleted - **/ - static void -ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) +ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid) { - struct ixgb_adapter *adapter = netdev->priv; - u32 vfta, index; + struct ixgb_adapter *adapter = netdev_priv(netdev); + uint32_t vfta, index; ixgb_irq_disable(adapter); - if (adapter->vlgrp) + if(adapter->vlgrp) adapter->vlgrp->vlan_devices[vid] = NULL; ixgb_irq_enable(adapter); - /* remove VID from filter table */ + /* remove VID from filter table*/ index = (vid >> 5) & 0x7F; vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); @@ -2230,120 +2098,36 @@ ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) ixgb_write_vfta(&adapter->hw, index, vfta); } -/** - * ixgb_restore_vlan - restores vlan settings after adapter reset. - * @param adapter the address of the board private structure - **/ static void ixgb_restore_vlan(struct ixgb_adapter *adapter) { ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp); - if (adapter->vlgrp) { - u16 vid; - for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) { - if (!adapter->vlgrp->vlan_devices[vid]) + 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); } } } -/** - * ixgb_rx_checksum - Receive Checksum Offload for 82597. - * @param adapter board private structure - * @param rx_desc receive descriptor - * @param skb 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_write_pci_cfg - write PCI configuration space. - * @param hw board specific data structure - * @param reg PCI configuration space register to write to - * @param value Value to be written to reg - **/ - -void -ixgb_write_pci_cfg(struct ixgb_hw *hw, u32 reg, u16 * value) -{ - struct ixgb_adapter *adapter = (struct ixgb_adapter *) hw->back; - - pci_write_config_word(adapter->pdev, reg, *value); -} - -/** - * ixgb_notify_reboot - handles OS notification of reboot event. - * @param nb notifier block, unused - * @param event Event being passed to driver to act upon - * @param p A pointer to our net device - **/ -static int -ixgb_notify_reboot(struct notifier_block *nb, unsigned long event, void *p) -{ - struct pci_dev *pdev = NULL; - - switch (event) { - case SYS_DOWN: - case SYS_HALT: - case SYS_POWER_OFF: - while ((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) { - if (pci_dev_driver(pdev) == &ixgb_driver) - ixgb_suspend(pdev, 3); - } - } - return NOTIFY_DONE; -} +#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. + */ -/** - * ixgb_suspend - driver suspend function called from notify. - * @param pdev pci driver structure used for passing to - * @param state power state to enter - **/ -static int -ixgb_suspend(struct pci_dev *pdev, u32 state) +static void ixgb_netpoll(struct net_device *dev) { - struct net_device *netdev = pci_get_drvdata(pdev); - struct ixgb_adapter *adapter = netdev->priv; - - netif_device_detach(netdev); - - if (netif_running(netdev)) - ixgb_down(adapter, TRUE); + struct ixgb_adapter *adapter = dev->priv; - pci_save_state(pdev, adapter->pci_state); - - state = (state > 0) ? 3 : 0; - pci_set_power_state(pdev, state); - msec_delay(200); - - return 0; + disable_irq(adapter->pdev->irq); + ixgb_intr(adapter->pdev->irq, dev, NULL); + enable_irq(adapter->pdev->irq); } +#endif /* ixgb_main.c */