diff options
Diffstat (limited to 'drivers/net/ixgb/ixgb_main.c')
| -rw-r--r-- | drivers/net/ixgb/ixgb_main.c | 480 |
1 files changed, 203 insertions, 277 deletions
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c index 41f3adf5f37..e83feaf830b 100644 --- a/drivers/net/ixgb/ixgb_main.c +++ b/drivers/net/ixgb/ixgb_main.c @@ -1,7 +1,7 @@ /******************************************************************************* Intel PRO/10GbE Linux driver - Copyright(c) 1999 - 2006 Intel Corporation. + Copyright(c) 1999 - 2008 Intel Corporation. This program is free software; you can redistribute it and/or modify it under the terms and conditions of the GNU General Public License, @@ -31,14 +31,16 @@ char ixgb_driver_name[] = "ixgb"; 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 "1.0.126-k4"DRIVERNAPI +#define DRV_VERSION "1.0.135-k2" DRIVERNAPI const char ixgb_driver_version[] = DRV_VERSION; -static const char ixgb_copyright[] = "Copyright (c) 1999-2006 Intel Corporation."; +static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation."; + +#define IXGB_CB_LENGTH 256 +static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH; +module_param(copybreak, uint, 0644); +MODULE_PARM_DESC(copybreak, + "Maximum size of packet that is copied to a new buffer on receive"); /* ixgb_pci_tbl - PCI Device ID Table * @@ -55,7 +57,7 @@ static struct pci_device_id ixgb_pci_tbl[] = { 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, + {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, /* required last entry */ @@ -65,16 +67,6 @@ static struct pci_device_id ixgb_pci_tbl[] = { MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl); /* Local Function Prototypes */ - -int ixgb_up(struct ixgb_adapter *adapter); -void ixgb_down(struct ixgb_adapter *adapter, bool 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); @@ -96,18 +88,15 @@ static int ixgb_set_mac(struct net_device *netdev, void *p); static irqreturn_t ixgb_intr(int irq, void *data); static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter); -#ifdef CONFIG_IXGB_NAPI -static int ixgb_clean(struct napi_struct *napi, int budget); -static bool ixgb_clean_rx_irq(struct ixgb_adapter *adapter, - int *work_done, int work_to_do); -#else -static bool ixgb_clean_rx_irq(struct ixgb_adapter *adapter); -#endif -static void ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter); +static int ixgb_clean(struct napi_struct *, int); +static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int); +static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int); + static void ixgb_tx_timeout(struct net_device *dev); static void ixgb_tx_timeout_task(struct work_struct *work); + static void ixgb_vlan_rx_register(struct net_device *netdev, - struct vlan_group *grp); + 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); @@ -118,7 +107,7 @@ static void ixgb_netpoll(struct net_device *dev); #endif static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev, - enum pci_channel_state state); + enum pci_channel_state state); static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev); static void ixgb_io_resume (struct pci_dev *pdev); @@ -146,14 +135,6 @@ static int debug = DEFAULT_DEBUG_LEVEL_SHIFT; module_param(debug, int, 0); MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); -/* some defines for controlling descriptor fetches in h/w */ -#define RXDCTL_WTHRESH_DEFAULT 15 /* 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 * @@ -236,7 +217,7 @@ ixgb_up(struct ixgb_adapter *adapter) ixgb_configure_tx(adapter); ixgb_setup_rctl(adapter); ixgb_configure_rx(adapter); - ixgb_alloc_rx_buffers(adapter); + ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring)); /* disable interrupts and get the hardware into a known state */ IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff); @@ -261,7 +242,7 @@ ixgb_up(struct ixgb_adapter *adapter) return err; } - if((hw->max_frame_size != max_frame) || + if ((hw->max_frame_size != max_frame) || (hw->max_frame_size != (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) { @@ -269,11 +250,11 @@ ixgb_up(struct ixgb_adapter *adapter) IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT); - if(hw->max_frame_size > + 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)) { + if (!(ctrl0 & IXGB_CTRL0_JFE)) { ctrl0 |= IXGB_CTRL0_JFE; IXGB_WRITE_REG(hw, CTRL0, ctrl0); } @@ -282,9 +263,7 @@ ixgb_up(struct ixgb_adapter *adapter) clear_bit(__IXGB_DOWN, &adapter->flags); -#ifdef CONFIG_IXGB_NAPI napi_enable(&adapter->napi); -#endif ixgb_irq_enable(adapter); mod_timer(&adapter->watchdog_timer, jiffies); @@ -300,9 +279,7 @@ ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog) /* prevent the interrupt handler from restarting watchdog */ set_bit(__IXGB_DOWN, &adapter->flags); -#ifdef CONFIG_IXGB_NAPI napi_disable(&adapter->napi); -#endif /* waiting for NAPI to complete can re-enable interrupts */ ixgb_irq_disable(adapter); free_irq(adapter->pdev->irq, netdev); @@ -310,7 +287,7 @@ ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog) if (adapter->have_msi) pci_disable_msi(adapter->pdev); - if(kill_watchdog) + if (kill_watchdog) del_timer_sync(&adapter->watchdog_timer); adapter->link_speed = 0; @@ -357,27 +334,25 @@ ixgb_reset(struct ixgb_adapter *adapter) **/ 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; 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))) + err = pci_enable_device(pdev); + if (err) return err; - if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) && - !(err = pci_set_consistent_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((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) || - (err = pci_set_consistent_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))) { printk(KERN_ERR "ixgb: No usable DMA configuration, aborting\n"); goto err_dma_mask; @@ -385,13 +360,14 @@ ixgb_probe(struct pci_dev *pdev, pci_using_dac = 0; } - if((err = pci_request_regions(pdev, ixgb_driver_name))) + err = pci_request_regions(pdev, ixgb_driver_name); + if (err) goto err_request_regions; pci_set_master(pdev); netdev = alloc_etherdev(sizeof(struct ixgb_adapter)); - if(!netdev) { + if (!netdev) { err = -ENOMEM; goto err_alloc_etherdev; } @@ -405,19 +381,17 @@ ixgb_probe(struct pci_dev *pdev, adapter->hw.back = adapter; adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT); - 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) { + adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, BAR_0), + pci_resource_len(pdev, BAR_0)); + 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; } @@ -433,9 +407,7 @@ ixgb_probe(struct pci_dev *pdev, ixgb_set_ethtool_ops(netdev); netdev->tx_timeout = &ixgb_tx_timeout; netdev->watchdog_timeo = 5 * HZ; -#ifdef CONFIG_IXGB_NAPI netif_napi_add(netdev, &adapter->napi, ixgb_clean, 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; @@ -444,9 +416,6 @@ ixgb_probe(struct pci_dev *pdev, #endif strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); - 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; @@ -454,7 +423,8 @@ ixgb_probe(struct pci_dev *pdev, /* setup the private structure */ - if((err = ixgb_sw_init(adapter))) + err = ixgb_sw_init(adapter); + if (err) goto err_sw_init; netdev->features = NETIF_F_SG | @@ -463,16 +433,13 @@ ixgb_probe(struct pci_dev *pdev, NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER; netdev->features |= NETIF_F_TSO; -#ifdef NETIF_F_LLTX - netdev->features |= NETIF_F_LLTX; -#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)) { + if (!ixgb_validate_eeprom_checksum(&adapter->hw)) { DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n"); err = -EIO; goto err_eeprom; @@ -481,7 +448,7 @@ ixgb_probe(struct pci_dev *pdev, 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->perm_addr)) { + if (!is_valid_ether_addr(netdev->perm_addr)) { DPRINTK(PROBE, ERR, "Invalid MAC Address\n"); err = -EIO; goto err_eeprom; @@ -496,7 +463,8 @@ ixgb_probe(struct pci_dev *pdev, INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task); strcpy(netdev->name, "eth%d"); - if((err = register_netdev(netdev))) + err = register_netdev(netdev); + if (err) goto err_register; /* we're going to reset, so assume we have no link for now */ @@ -543,6 +511,8 @@ ixgb_remove(struct pci_dev *pdev) struct net_device *netdev = pci_get_drvdata(pdev); struct ixgb_adapter *adapter = netdev_priv(netdev); + flush_scheduled_work(); + unregister_netdev(netdev); iounmap(adapter->hw.hw_addr); @@ -575,13 +545,13 @@ ixgb_sw_init(struct ixgb_adapter *adapter) hw->subsystem_id = pdev->subsystem_device; hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; - adapter->rx_buffer_len = hw->max_frame_size; + adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */ - if((hw->device_id == IXGB_DEVICE_ID_82597EX) + if ((hw->device_id == IXGB_DEVICE_ID_82597EX) || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR) || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR)) - hw->mac_type = ixgb_82597; + hw->mac_type = ixgb_82597; else { /* should never have loaded on this device */ DPRINTK(PROBE, ERR, "unsupported device id\n"); @@ -590,8 +560,6 @@ ixgb_sw_init(struct ixgb_adapter *adapter) /* enable flow control to be programmed */ hw->fc.send_xon = 1; - spin_lock_init(&adapter->tx_lock); - set_bit(__IXGB_DOWN, &adapter->flags); return 0; } @@ -616,16 +584,18 @@ ixgb_open(struct net_device *netdev) int err; /* allocate transmit descriptors */ - - if((err = ixgb_setup_tx_resources(adapter))) + err = ixgb_setup_tx_resources(adapter); + if (err) goto err_setup_tx; /* allocate receive descriptors */ - if((err = ixgb_setup_rx_resources(adapter))) + err = ixgb_setup_rx_resources(adapter); + if (err) goto err_setup_rx; - if((err = ixgb_up(adapter))) + err = ixgb_up(adapter); + if (err) goto err_up; return 0; @@ -681,7 +651,7 @@ ixgb_setup_tx_resources(struct ixgb_adapter *adapter) size = sizeof(struct ixgb_buffer) * txdr->count; txdr->buffer_info = vmalloc(size); - if(!txdr->buffer_info) { + if (!txdr->buffer_info) { DPRINTK(PROBE, ERR, "Unable to allocate transmit descriptor ring memory\n"); return -ENOMEM; @@ -694,7 +664,7 @@ ixgb_setup_tx_resources(struct ixgb_adapter *adapter) txdr->size = ALIGN(txdr->size, 4096); txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma); - if(!txdr->desc) { + if (!txdr->desc) { vfree(txdr->buffer_info); DPRINTK(PROBE, ERR, "Unable to allocate transmit descriptor memory\n"); @@ -723,8 +693,8 @@ ixgb_configure_tx(struct ixgb_adapter *adapter) u32 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 + /* 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)); @@ -750,8 +720,8 @@ ixgb_configure_tx(struct ixgb_adapter *adapter) /* 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_TX_DESC_TYPE | + (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0); } /** @@ -770,7 +740,7 @@ ixgb_setup_rx_resources(struct ixgb_adapter *adapter) size = sizeof(struct ixgb_buffer) * rxdr->count; rxdr->buffer_info = vmalloc(size); - if(!rxdr->buffer_info) { + if (!rxdr->buffer_info) { DPRINTK(PROBE, ERR, "Unable to allocate receive descriptor ring\n"); return -ENOMEM; @@ -784,7 +754,7 @@ ixgb_setup_rx_resources(struct ixgb_adapter *adapter) rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma); - if(!rxdr->desc) { + if (!rxdr->desc) { vfree(rxdr->buffer_info); DPRINTK(PROBE, ERR, "Unable to allocate receive descriptors\n"); @@ -813,8 +783,8 @@ ixgb_setup_rctl(struct ixgb_adapter *adapter) rctl &= ~(3 << IXGB_RCTL_MO_SHIFT); rctl |= - IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 | - IXGB_RCTL_RXEN | IXGB_RCTL_CFF | + 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; @@ -846,7 +816,6 @@ ixgb_configure_rx(struct ixgb_adapter *adapter) struct ixgb_hw *hw = &adapter->hw; u32 rctl; u32 rxcsum; - u32 rxdctl; /* make sure receives are disabled while setting up the descriptors */ @@ -868,18 +837,12 @@ ixgb_configure_rx(struct ixgb_adapter *adapter) 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); + /* due to the hardware errata with RXDCTL, we are unable to use any of + * the performance enhancing features of it without causing other + * subtle bugs, some of the bugs could include receive length + * corruption at high data rates (WTHRESH > 0) and/or receive + * descriptor ring irregularites (particularly in hardware cache) */ + IXGB_WRITE_REG(hw, RXDCTL, 0); /* Enable Receive Checksum Offload for TCP and UDP */ if (adapter->rx_csum) { @@ -918,7 +881,7 @@ ixgb_free_tx_resources(struct ixgb_adapter *adapter) static void ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter, - struct ixgb_buffer *buffer_info) + struct ixgb_buffer *buffer_info) { struct pci_dev *pdev = adapter->pdev; @@ -926,8 +889,10 @@ ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter, pci_unmap_page(pdev, buffer_info->dma, buffer_info->length, PCI_DMA_TODEVICE); + /* okay to call kfree_skb here instead of kfree_skb_any because + * this is never called in interrupt context */ if (buffer_info->skb) - dev_kfree_skb_any(buffer_info->skb); + dev_kfree_skb(buffer_info->skb); buffer_info->skb = NULL; buffer_info->dma = 0; @@ -952,7 +917,7 @@ ixgb_clean_tx_ring(struct ixgb_adapter *adapter) /* Free all the Tx ring sk_buffs */ - for(i = 0; i < tx_ring->count; i++) { + for (i = 0; i < tx_ring->count; i++) { buffer_info = &tx_ring->buffer_info[i]; ixgb_unmap_and_free_tx_resource(adapter, buffer_info); } @@ -1010,9 +975,9 @@ ixgb_clean_rx_ring(struct ixgb_adapter *adapter) /* Free all the Rx ring sk_buffs */ - for(i = 0; i < rx_ring->count; i++) { + for (i = 0; i < rx_ring->count; i++) { buffer_info = &rx_ring->buffer_info[i]; - if(buffer_info->skb) { + if (buffer_info->skb) { pci_unmap_single(pdev, buffer_info->dma, @@ -1053,7 +1018,7 @@ 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)) + if (!is_valid_ether_addr(addr->sa_data)) return -EADDRNOTAVAIL; memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); @@ -1086,16 +1051,16 @@ ixgb_set_multi(struct net_device *netdev) 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 { @@ -1104,10 +1069,11 @@ ixgb_set_multi(struct net_device *netdev) 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); } @@ -1132,8 +1098,8 @@ 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)) { DPRINTK(LINK, INFO, "NIC Link is Up 10000 Mbps Full Duplex\n"); adapter->link_speed = 10000; @@ -1142,7 +1108,7 @@ ixgb_watchdog(unsigned long data) netif_wake_queue(netdev); } } else { - if(netif_carrier_ok(netdev)) { + if (netif_carrier_ok(netdev)) { adapter->link_speed = 0; adapter->link_duplex = 0; DPRINTK(LINK, INFO, "NIC Link is Down\n"); @@ -1154,8 +1120,8 @@ ixgb_watchdog(unsigned long data) ixgb_update_stats(adapter); - if(!netif_carrier_ok(netdev)) { - if(IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) { + 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. @@ -1227,7 +1193,7 @@ ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb) 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_TYPE | IXGB_CONTEXT_DESC_CMD_TSE | IXGB_CONTEXT_DESC_CMD_IP | IXGB_CONTEXT_DESC_CMD_TCP @@ -1235,7 +1201,7 @@ ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb) | (skb->len - (hdr_len))); - if(++i == adapter->tx_ring.count) i = 0; + if (++i == adapter->tx_ring.count) i = 0; adapter->tx_ring.next_to_use = i; return 1; @@ -1251,7 +1217,7 @@ ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb) unsigned int i; u8 css, cso; - if(likely(skb->ip_summed == CHECKSUM_PARTIAL)) { + if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { struct ixgb_buffer *buffer_info; css = skb_transport_offset(skb); cso = css + skb->csum_offset; @@ -1273,7 +1239,7 @@ ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb) cpu_to_le32(IXGB_CONTEXT_DESC_TYPE | IXGB_TX_DESC_CMD_IDE); - if(++i == adapter->tx_ring.count) i = 0; + if (++i == adapter->tx_ring.count) i = 0; adapter->tx_ring.next_to_use = i; return true; @@ -1302,7 +1268,7 @@ ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb, i = tx_ring->next_to_use; - while(len) { + while (len) { buffer_info = &tx_ring->buffer_info[i]; size = min(len, IXGB_MAX_DATA_PER_TXD); /* Workaround for premature desc write-backs @@ -1312,28 +1278,28 @@ ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb, buffer_info->length = size; WARN_ON(buffer_info->dma != 0); + buffer_info->time_stamp = jiffies; buffer_info->dma = pci_map_single(adapter->pdev, skb->data + offset, size, PCI_DMA_TODEVICE); - buffer_info->time_stamp = jiffies; buffer_info->next_to_watch = 0; len -= size; offset += size; count++; - if(++i == tx_ring->count) i = 0; + if (++i == tx_ring->count) i = 0; } - for(f = 0; f < 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) { + while (len) { buffer_info = &tx_ring->buffer_info[i]; size = min(len, IXGB_MAX_DATA_PER_TXD); @@ -1344,19 +1310,19 @@ ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb, size -= 4; buffer_info->length = size; + buffer_info->time_stamp = jiffies; buffer_info->dma = pci_map_page(adapter->pdev, frag->page, frag->page_offset + offset, size, PCI_DMA_TODEVICE); - buffer_info->time_stamp = jiffies; buffer_info->next_to_watch = 0; len -= size; offset += size; count++; - if(++i == tx_ring->count) i = 0; + if (++i == tx_ring->count) i = 0; } } i = (i == 0) ? tx_ring->count - 1 : i - 1; @@ -1377,21 +1343,20 @@ ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags) u8 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(buffer_info->dma); @@ -1401,11 +1366,11 @@ ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags) tx_desc->popts = popts; tx_desc->vlan = cpu_to_le16(vlan_id); - if(++i == tx_ring->count) i = 0; + 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 ); + 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 @@ -1461,7 +1426,6 @@ 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; @@ -1470,51 +1434,31 @@ ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev) return NETDEV_TX_OK; } - if(skb->len <= 0) { - dev_kfree_skb_any(skb); + if (skb->len <= 0) { + dev_kfree_skb(skb); return 0; } -#ifdef NETIF_F_LLTX - if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) { - /* Collision - tell upper layer to requeue */ - local_irq_restore(flags); - return NETDEV_TX_LOCKED; - } -#else - spin_lock_irqsave(&adapter->tx_lock, flags); -#endif - if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, - DESC_NEEDED))) { - netif_stop_queue(netdev); - spin_unlock_irqrestore(&adapter->tx_lock, flags); + DESC_NEEDED))) return NETDEV_TX_BUSY; - } -#ifndef NETIF_F_LLTX - spin_unlock_irqrestore(&adapter->tx_lock, flags); -#endif - - 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); } first = adapter->tx_ring.next_to_use; - + tso = ixgb_tso(adapter, skb); if (tso < 0) { - dev_kfree_skb_any(skb); -#ifdef NETIF_F_LLTX - spin_unlock_irqrestore(&adapter->tx_lock, flags); -#endif + dev_kfree_skb(skb); return NETDEV_TX_OK; } if (likely(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; ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id, @@ -1522,13 +1466,9 @@ ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev) netdev->trans_start = jiffies; -#ifdef NETIF_F_LLTX /* Make sure there is space in the ring for the next send. */ ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED); - spin_unlock_irqrestore(&adapter->tx_lock, flags); - -#endif return NETDEV_TX_OK; } @@ -1588,21 +1528,25 @@ ixgb_change_mtu(struct net_device *netdev, int new_mtu) 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)) { + /* MTU < 68 is an error for IPv4 traffic, just don't allow it */ + if ((new_mtu < 68) || + (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) { DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu); return -EINVAL; } - adapter->rx_buffer_len = max_frame; + if (old_max_frame == max_frame) + return 0; + + if (netif_running(netdev)) + ixgb_down(adapter, true); + + adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */ netdev->mtu = new_mtu; - if ((old_max_frame != max_frame) && netif_running(netdev)) { - ixgb_down(adapter, true); + if (netif_running(netdev)) ixgb_up(adapter); - } return 0; } @@ -1622,21 +1566,21 @@ ixgb_update_stats(struct ixgb_adapter *adapter) if (pci_channel_offline(pdev)) return; - if((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) || + 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; + 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) + if (multi >= bcast) multi -= bcast; - + adapter->stats.mprcl += (multi & 0xFFFFFFFF); adapter->stats.mprch += (multi >> 32); - adapter->stats.bprcl += bcast_l; + adapter->stats.bprcl += bcast_l; adapter->stats.bprch += bcast_h; } else { adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL); @@ -1751,41 +1695,26 @@ ixgb_intr(int irq, void *data) struct ixgb_adapter *adapter = netdev_priv(netdev); struct ixgb_hw *hw = &adapter->hw; u32 icr = IXGB_READ_REG(hw, ICR); -#ifndef CONFIG_IXGB_NAPI - unsigned int i; -#endif - if(unlikely(!icr)) + if (unlikely(!icr)) return IRQ_NONE; /* Not our interrupt */ if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) if (!test_bit(__IXGB_DOWN, &adapter->flags)) mod_timer(&adapter->watchdog_timer, jiffies); -#ifdef CONFIG_IXGB_NAPI if (netif_rx_schedule_prep(netdev, &adapter->napi)) { - /* Disable interrupts and register for poll. The flush + /* Disable interrupts and register for poll. The flush of the posted write is intentionally left out. */ IXGB_WRITE_REG(&adapter->hw, IMC, ~0); __netif_rx_schedule(netdev, &adapter->napi); } -#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 @@ -1804,12 +1733,12 @@ ixgb_clean(struct napi_struct *napi, int budget) /* If budget not fully consumed, exit the polling mode */ if (work_done < budget) { netif_rx_complete(netdev, napi); - ixgb_irq_enable(adapter); + if (!test_bit(__IXGB_DOWN, &adapter->flags)) + ixgb_irq_enable(adapter); } return work_done; } -#endif /** * ixgb_clean_tx_irq - Reclaim resources after transmit completes @@ -1830,15 +1759,15 @@ ixgb_clean_tx_irq(struct ixgb_adapter *adapter) 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) { + 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)) + 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); @@ -1846,7 +1775,7 @@ ixgb_clean_tx_irq(struct ixgb_adapter *adapter) *(u32 *)&(tx_desc->status) = 0; cleaned = (i == eop); - if(++i == tx_ring->count) i = 0; + if (++i == tx_ring->count) i = 0; } eop = tx_ring->buffer_info[i].next_to_watch; @@ -1855,15 +1784,20 @@ ixgb_clean_tx_irq(struct ixgb_adapter *adapter) tx_ring->next_to_clean = i; - if (unlikely(netif_queue_stopped(netdev))) { - spin_lock(&adapter->tx_lock); - if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev) && - (IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) + if (unlikely(cleaned && netif_carrier_ok(netdev) && + IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) { + /* Make sure that anybody stopping the queue after this + * sees the new next_to_clean. */ + smp_mb(); + + if (netif_queue_stopped(netdev) && + !(test_bit(__IXGB_DOWN, &adapter->flags))) { netif_wake_queue(netdev); - spin_unlock(&adapter->tx_lock); + ++adapter->restart_queue; + } } - if(adapter->detect_tx_hung) { + 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; @@ -1906,13 +1840,13 @@ ixgb_clean_tx_irq(struct ixgb_adapter *adapter) static void ixgb_rx_checksum(struct ixgb_adapter *adapter, - struct ixgb_rx_desc *rx_desc, - struct sk_buff *skb) + 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) || + if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) || (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) { skb->ip_summed = CHECKSUM_NONE; return; @@ -1920,7 +1854,7 @@ ixgb_rx_checksum(struct ixgb_adapter *adapter, /* 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) { + 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++; @@ -1937,11 +1871,7 @@ ixgb_rx_checksum(struct ixgb_adapter *adapter, **/ static bool -#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; @@ -1950,50 +1880,50 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter) struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer; u32 length; unsigned int i, j; + int cleaned_count = 0; bool 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; + while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) { + struct sk_buff *skb; u8 status; -#ifdef CONFIG_IXGB_NAPI - if(*work_done >= work_to_do) + if (*work_done >= work_to_do) break; (*work_done)++; -#endif status = rx_desc->status; skb = buffer_info->skb; buffer_info->skb = NULL; - prefetch(skb->data); + prefetch(skb->data - NET_IP_ALIGN); - if(++i == rx_ring->count) i = 0; + 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; + 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; + cleaned_count++; pci_unmap_single(pdev, buffer_info->dma, buffer_info->length, PCI_DMA_FROMDEVICE); + buffer_info->dma = 0; length = le16_to_cpu(rx_desc->length); + rx_desc->length = 0; - if(unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) { + if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) { /* All receives must fit into a single buffer */ @@ -2004,11 +1934,9 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter) 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))) { - + 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; } @@ -2016,8 +1944,7 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter) /* code added for copybreak, this should improve * performance for small packets with large amounts * of reassembly being done in the stack */ -#define IXGB_CB_LENGTH 256 - if (length < IXGB_CB_LENGTH) { + if (length < copybreak) { struct sk_buff *new_skb = netdev_alloc_skb(netdev, length + NET_IP_ALIGN); if (new_skb) { @@ -2042,27 +1969,24 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter) 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)) { + if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) { vlan_hwaccel_receive_skb(skb, adapter->vlgrp, - le16_to_cpu(rx_desc->special)); + le16_to_cpu(rx_desc->special)); } 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)); - } 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; + /* return some buffers to hardware, one at a time is too slow */ + if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) { + ixgb_alloc_rx_buffers(adapter, cleaned_count); + cleaned_count = 0; + } + /* use prefetched values */ rx_desc = next_rxd; buffer_info = next_buffer; @@ -2070,7 +1994,9 @@ rxdesc_done: rx_ring->next_to_clean = i; - ixgb_alloc_rx_buffers(adapter); + cleaned_count = IXGB_DESC_UNUSED(rx_ring); + if (cleaned_count) + ixgb_alloc_rx_buffers(adapter, cleaned_count); return cleaned; } @@ -2081,7 +2007,7 @@ rxdesc_done: **/ static void -ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter) +ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count) { struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; struct net_device *netdev = adapter->netdev; @@ -2098,7 +2024,7 @@ ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter) /* leave three descriptors unused */ - while(--cleancount > 2) { + while (--cleancount > 2 && cleaned_count--) { /* recycle! its good for you */ skb = buffer_info->skb; if (skb) { @@ -2131,12 +2057,12 @@ map_skb: rx_desc = IXGB_RX_DESC(*rx_ring, i); 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 + * this is the rest of the workaround for h/w double * writeback. */ rx_desc->status = 0; - if(++i == rx_ring->count) i = 0; + if (++i == rx_ring->count) i = 0; buffer_info = &rx_ring->buffer_info[i]; } @@ -2156,7 +2082,7 @@ map_skb: /** * 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 **/ @@ -2169,7 +2095,7 @@ ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp) 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; @@ -2241,10 +2167,10 @@ ixgb_restore_vlan(struct ixgb_adapter *adapter) { ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp); - if(adapter->vlgrp) { + if (adapter->vlgrp) { u16 vid; - for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) { - if(!vlan_group_get_device(adapter->vlgrp, vid)) + for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) { + if (!vlan_group_get_device(adapter->vlgrp, vid)) continue; ixgb_vlan_rx_add_vid(adapter->netdev, vid); } @@ -2276,13 +2202,13 @@ static void ixgb_netpoll(struct net_device *dev) * This callback is called by the PCI subsystem whenever * a PCI bus error is detected. */ -static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev, - enum pci_channel_state state) +static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev, + enum pci_channel_state state) { struct net_device *netdev = pci_get_drvdata(pdev); struct ixgb_adapter *adapter = netdev_priv(netdev); - if(netif_running(netdev)) + if (netif_running(netdev)) ixgb_down(adapter, true); pci_disable_device(pdev); @@ -2295,17 +2221,17 @@ static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev, * ixgb_io_slot_reset - called after the pci bus has been reset. * @pdev pointer to pci device with error * - * This callback is called after the PCI buss has been reset. + * This callback is called after the PCI bus has been reset. * Basically, this tries to restart the card from scratch. * This is a shortened version of the device probe/discovery code, * it resembles the first-half of the ixgb_probe() routine. */ -static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev) +static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev) { struct net_device *netdev = pci_get_drvdata(pdev); struct ixgb_adapter *adapter = netdev_priv(netdev); - if(pci_enable_device(pdev)) { + if (pci_enable_device(pdev)) { DPRINTK(PROBE, ERR, "Cannot re-enable PCI device after reset.\n"); return PCI_ERS_RESULT_DISCONNECT; } @@ -2321,14 +2247,14 @@ static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev) ixgb_reset(adapter); /* Make sure the EEPROM is good */ - if(!ixgb_validate_eeprom_checksum(&adapter->hw)) { + if (!ixgb_validate_eeprom_checksum(&adapter->hw)) { DPRINTK(PROBE, ERR, "After reset, the EEPROM checksum is not valid.\n"); return PCI_ERS_RESULT_DISCONNECT; } 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->perm_addr)) { + if (!is_valid_ether_addr(netdev->perm_addr)) { DPRINTK(PROBE, ERR, "After reset, invalid MAC address.\n"); return PCI_ERS_RESULT_DISCONNECT; } @@ -2344,15 +2270,15 @@ static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev) * normal operation. Implementation resembles the second-half * of the ixgb_probe() routine. */ -static void ixgb_io_resume (struct pci_dev *pdev) +static void ixgb_io_resume(struct pci_dev *pdev) { struct net_device *netdev = pci_get_drvdata(pdev); struct ixgb_adapter *adapter = netdev_priv(netdev); pci_set_master(pdev); - if(netif_running(netdev)) { - if(ixgb_up(adapter)) { + if (netif_running(netdev)) { + if (ixgb_up(adapter)) { printk ("ixgb: can't bring device back up after reset\n"); return; } |