diff options
Diffstat (limited to 'drivers/net/igb/igb_main.c')
| -rw-r--r-- | drivers/net/igb/igb_main.c | 4138 |
1 files changed, 4138 insertions, 0 deletions
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c new file mode 100644 index 00000000000..f3c144d5d72 --- /dev/null +++ b/drivers/net/igb/igb_main.c @@ -0,0 +1,4138 @@ +/******************************************************************************* + + Intel(R) Gigabit Ethernet Linux driver + Copyright(c) 2007 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, + version 2, as published by the Free Software Foundation. + + This program is distributed in the hope it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + more details. + + You should have received a copy of the GNU General Public License along with + this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + + The full GNU General Public License is included in this distribution in + the file called "COPYING". + + Contact Information: + e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> + Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 + +*******************************************************************************/ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/init.h> +#include <linux/vmalloc.h> +#include <linux/pagemap.h> +#include <linux/netdevice.h> +#include <linux/tcp.h> +#include <linux/ipv6.h> +#include <net/checksum.h> +#include <net/ip6_checksum.h> +#include <linux/mii.h> +#include <linux/ethtool.h> +#include <linux/if_vlan.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/if_ether.h> + +#include "igb.h" + +#define DRV_VERSION "1.0.8-k2" +char igb_driver_name[] = "igb"; +char igb_driver_version[] = DRV_VERSION; +static const char igb_driver_string[] = + "Intel(R) Gigabit Ethernet Network Driver"; +static const char igb_copyright[] = "Copyright (c) 2007 Intel Corporation."; + + +static const struct e1000_info *igb_info_tbl[] = { + [board_82575] = &e1000_82575_info, +}; + +static struct pci_device_id igb_pci_tbl[] = { + { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_COPPER), board_82575 }, + { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_FIBER_SERDES), board_82575 }, + { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575GB_QUAD_COPPER), board_82575 }, + /* required last entry */ + {0, } +}; + +MODULE_DEVICE_TABLE(pci, igb_pci_tbl); + +void igb_reset(struct igb_adapter *); +static int igb_setup_all_tx_resources(struct igb_adapter *); +static int igb_setup_all_rx_resources(struct igb_adapter *); +static void igb_free_all_tx_resources(struct igb_adapter *); +static void igb_free_all_rx_resources(struct igb_adapter *); +static void igb_free_tx_resources(struct igb_adapter *, struct igb_ring *); +static void igb_free_rx_resources(struct igb_adapter *, struct igb_ring *); +void igb_update_stats(struct igb_adapter *); +static int igb_probe(struct pci_dev *, const struct pci_device_id *); +static void __devexit igb_remove(struct pci_dev *pdev); +static int igb_sw_init(struct igb_adapter *); +static int igb_open(struct net_device *); +static int igb_close(struct net_device *); +static void igb_configure_tx(struct igb_adapter *); +static void igb_configure_rx(struct igb_adapter *); +static void igb_setup_rctl(struct igb_adapter *); +static void igb_clean_all_tx_rings(struct igb_adapter *); +static void igb_clean_all_rx_rings(struct igb_adapter *); +static void igb_clean_tx_ring(struct igb_adapter *, struct igb_ring *); +static void igb_clean_rx_ring(struct igb_adapter *, struct igb_ring *); +static void igb_set_multi(struct net_device *); +static void igb_update_phy_info(unsigned long); +static void igb_watchdog(unsigned long); +static void igb_watchdog_task(struct work_struct *); +static int igb_xmit_frame_ring_adv(struct sk_buff *, struct net_device *, + struct igb_ring *); +static int igb_xmit_frame_adv(struct sk_buff *skb, struct net_device *); +static struct net_device_stats *igb_get_stats(struct net_device *); +static int igb_change_mtu(struct net_device *, int); +static int igb_set_mac(struct net_device *, void *); +static irqreturn_t igb_intr(int irq, void *); +static irqreturn_t igb_intr_msi(int irq, void *); +static irqreturn_t igb_msix_other(int irq, void *); +static irqreturn_t igb_msix_rx(int irq, void *); +static irqreturn_t igb_msix_tx(int irq, void *); +static int igb_clean_rx_ring_msix(struct napi_struct *, int); +static bool igb_clean_tx_irq(struct igb_adapter *, struct igb_ring *); +static int igb_clean(struct napi_struct *, int); +static bool igb_clean_rx_irq_adv(struct igb_adapter *, + struct igb_ring *, int *, int); +static void igb_alloc_rx_buffers_adv(struct igb_adapter *, + struct igb_ring *, int); +static int igb_ioctl(struct net_device *, struct ifreq *, int cmd); +static void igb_tx_timeout(struct net_device *); +static void igb_reset_task(struct work_struct *); +static void igb_vlan_rx_register(struct net_device *, struct vlan_group *); +static void igb_vlan_rx_add_vid(struct net_device *, u16); +static void igb_vlan_rx_kill_vid(struct net_device *, u16); +static void igb_restore_vlan(struct igb_adapter *); + +static int igb_suspend(struct pci_dev *, pm_message_t); +#ifdef CONFIG_PM +static int igb_resume(struct pci_dev *); +#endif +static void igb_shutdown(struct pci_dev *); + +#ifdef CONFIG_NET_POLL_CONTROLLER +/* for netdump / net console */ +static void igb_netpoll(struct net_device *); +#endif + +static pci_ers_result_t igb_io_error_detected(struct pci_dev *, + pci_channel_state_t); +static pci_ers_result_t igb_io_slot_reset(struct pci_dev *); +static void igb_io_resume(struct pci_dev *); + +static struct pci_error_handlers igb_err_handler = { + .error_detected = igb_io_error_detected, + .slot_reset = igb_io_slot_reset, + .resume = igb_io_resume, +}; + + +static struct pci_driver igb_driver = { + .name = igb_driver_name, + .id_table = igb_pci_tbl, + .probe = igb_probe, + .remove = __devexit_p(igb_remove), +#ifdef CONFIG_PM + /* Power Managment Hooks */ + .suspend = igb_suspend, + .resume = igb_resume, +#endif + .shutdown = igb_shutdown, + .err_handler = &igb_err_handler +}; + +MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>"); +MODULE_DESCRIPTION("Intel(R) Gigabit Ethernet Network Driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); + +#ifdef DEBUG +/** + * igb_get_hw_dev_name - return device name string + * used by hardware layer to print debugging information + **/ +char *igb_get_hw_dev_name(struct e1000_hw *hw) +{ + struct igb_adapter *adapter = hw->back; + return adapter->netdev->name; +} +#endif + +/** + * igb_init_module - Driver Registration Routine + * + * igb_init_module is the first routine called when the driver is + * loaded. All it does is register with the PCI subsystem. + **/ +static int __init igb_init_module(void) +{ + int ret; + printk(KERN_INFO "%s - version %s\n", + igb_driver_string, igb_driver_version); + + printk(KERN_INFO "%s\n", igb_copyright); + + ret = pci_register_driver(&igb_driver); + return ret; +} + +module_init(igb_init_module); + +/** + * igb_exit_module - Driver Exit Cleanup Routine + * + * igb_exit_module is called just before the driver is removed + * from memory. + **/ +static void __exit igb_exit_module(void) +{ + pci_unregister_driver(&igb_driver); +} + +module_exit(igb_exit_module); + +/** + * igb_alloc_queues - Allocate memory for all rings + * @adapter: board private structure to initialize + * + * We allocate one ring per queue at run-time since we don't know the + * number of queues at compile-time. + **/ +static int igb_alloc_queues(struct igb_adapter *adapter) +{ + int i; + + adapter->tx_ring = kcalloc(adapter->num_tx_queues, + sizeof(struct igb_ring), GFP_KERNEL); + if (!adapter->tx_ring) + return -ENOMEM; + + adapter->rx_ring = kcalloc(adapter->num_rx_queues, + sizeof(struct igb_ring), GFP_KERNEL); + if (!adapter->rx_ring) { + kfree(adapter->tx_ring); + return -ENOMEM; + } + + for (i = 0; i < adapter->num_rx_queues; i++) { + struct igb_ring *ring = &(adapter->rx_ring[i]); + ring->adapter = adapter; + ring->itr_register = E1000_ITR; + + if (!ring->napi.poll) + netif_napi_add(adapter->netdev, &ring->napi, igb_clean, + adapter->napi.weight / + adapter->num_rx_queues); + } + return 0; +} + +#define IGB_N0_QUEUE -1 +static void igb_assign_vector(struct igb_adapter *adapter, int rx_queue, + int tx_queue, int msix_vector) +{ + u32 msixbm = 0; + struct e1000_hw *hw = &adapter->hw; + /* The 82575 assigns vectors using a bitmask, which matches the + bitmask for the EICR/EIMS/EIMC registers. To assign one + or more queues to a vector, we write the appropriate bits + into the MSIXBM register for that vector. */ + if (rx_queue > IGB_N0_QUEUE) { + msixbm = E1000_EICR_RX_QUEUE0 << rx_queue; + adapter->rx_ring[rx_queue].eims_value = msixbm; + } + if (tx_queue > IGB_N0_QUEUE) { + msixbm |= E1000_EICR_TX_QUEUE0 << tx_queue; + adapter->tx_ring[tx_queue].eims_value = + E1000_EICR_TX_QUEUE0 << tx_queue; + } + array_wr32(E1000_MSIXBM(0), msix_vector, msixbm); +} + +/** + * igb_configure_msix - Configure MSI-X hardware + * + * igb_configure_msix sets up the hardware to properly + * generate MSI-X interrupts. + **/ +static void igb_configure_msix(struct igb_adapter *adapter) +{ + u32 tmp; + int i, vector = 0; + struct e1000_hw *hw = &adapter->hw; + + adapter->eims_enable_mask = 0; + + for (i = 0; i < adapter->num_tx_queues; i++) { + struct igb_ring *tx_ring = &adapter->tx_ring[i]; + igb_assign_vector(adapter, IGB_N0_QUEUE, i, vector++); + adapter->eims_enable_mask |= tx_ring->eims_value; + if (tx_ring->itr_val) + writel(1000000000 / (tx_ring->itr_val * 256), + hw->hw_addr + tx_ring->itr_register); + else + writel(1, hw->hw_addr + tx_ring->itr_register); + } + + for (i = 0; i < adapter->num_rx_queues; i++) { + struct igb_ring *rx_ring = &adapter->rx_ring[i]; + igb_assign_vector(adapter, i, IGB_N0_QUEUE, vector++); + adapter->eims_enable_mask |= rx_ring->eims_value; + if (rx_ring->itr_val) + writel(1000000000 / (rx_ring->itr_val * 256), + hw->hw_addr + rx_ring->itr_register); + else + writel(1, hw->hw_addr + rx_ring->itr_register); + } + + + /* set vector for other causes, i.e. link changes */ + array_wr32(E1000_MSIXBM(0), vector++, + E1000_EIMS_OTHER); + + /* disable IAM for ICR interrupt bits */ + wr32(E1000_IAM, 0); + + tmp = rd32(E1000_CTRL_EXT); + /* enable MSI-X PBA support*/ + tmp |= E1000_CTRL_EXT_PBA_CLR; + + /* Auto-Mask interrupts upon ICR read. */ + tmp |= E1000_CTRL_EXT_EIAME; + tmp |= E1000_CTRL_EXT_IRCA; + + wr32(E1000_CTRL_EXT, tmp); + adapter->eims_enable_mask |= E1000_EIMS_OTHER; + + wrfl(); +} + +/** + * igb_request_msix - Initialize MSI-X interrupts + * + * igb_request_msix allocates MSI-X vectors and requests interrupts from the + * kernel. + **/ +static int igb_request_msix(struct igb_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + int i, err = 0, vector = 0; + + vector = 0; + + for (i = 0; i < adapter->num_tx_queues; i++) { + struct igb_ring *ring = &(adapter->tx_ring[i]); + sprintf(ring->name, "%s-tx%d", netdev->name, i); + err = request_irq(adapter->msix_entries[vector].vector, + &igb_msix_tx, 0, ring->name, + &(adapter->tx_ring[i])); + if (err) + goto out; + ring->itr_register = E1000_EITR(0) + (vector << 2); + ring->itr_val = adapter->itr; + vector++; + } + for (i = 0; i < adapter->num_rx_queues; i++) { + struct igb_ring *ring = &(adapter->rx_ring[i]); + if (strlen(netdev->name) < (IFNAMSIZ - 5)) + sprintf(ring->name, "%s-rx%d", netdev->name, i); + else + memcpy(ring->name, netdev->name, IFNAMSIZ); + err = request_irq(adapter->msix_entries[vector].vector, + &igb_msix_rx, 0, ring->name, + &(adapter->rx_ring[i])); + if (err) + goto out; + ring->itr_register = E1000_EITR(0) + (vector << 2); + ring->itr_val = adapter->itr; + vector++; + } + + err = request_irq(adapter->msix_entries[vector].vector, + &igb_msix_other, 0, netdev->name, netdev); + if (err) + goto out; + + adapter->napi.poll = igb_clean_rx_ring_msix; + for (i = 0; i < adapter->num_rx_queues; i++) + adapter->rx_ring[i].napi.poll = adapter->napi.poll; + igb_configure_msix(adapter); + return 0; +out: + return err; +} + +static void igb_reset_interrupt_capability(struct igb_adapter *adapter) +{ + if (adapter->msix_entries) { + pci_disable_msix(adapter->pdev); + kfree(adapter->msix_entries); + adapter->msix_entries = NULL; + } else if (adapter->msi_enabled) + pci_disable_msi(adapter->pdev); + return; +} + + +/** + * igb_set_interrupt_capability - set MSI or MSI-X if supported + * + * Attempt to configure interrupts using the best available + * capabilities of the hardware and kernel. + **/ +static void igb_set_interrupt_capability(struct igb_adapter *adapter) +{ + int err; + int numvecs, i; + + numvecs = adapter->num_tx_queues + adapter->num_rx_queues + 1; + adapter->msix_entries = kcalloc(numvecs, sizeof(struct msix_entry), + GFP_KERNEL); + if (!adapter->msix_entries) + goto msi_only; + + for (i = 0; i < numvecs; i++) + adapter->msix_entries[i].entry = i; + + err = pci_enable_msix(adapter->pdev, + adapter->msix_entries, + numvecs); + if (err == 0) + return; + + igb_reset_interrupt_capability(adapter); + + /* If we can't do MSI-X, try MSI */ +msi_only: + adapter->num_rx_queues = 1; + if (!pci_enable_msi(adapter->pdev)) + adapter->msi_enabled = 1; + return; +} + +/** + * igb_request_irq - initialize interrupts + * + * Attempts to configure interrupts using the best available + * capabilities of the hardware and kernel. + **/ +static int igb_request_irq(struct igb_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct e1000_hw *hw = &adapter->hw; + int err = 0; + + if (adapter->msix_entries) { + err = igb_request_msix(adapter); + if (!err) { + struct e1000_hw *hw = &adapter->hw; + /* enable IAM, auto-mask, + * DO NOT USE EIAME or IAME in legacy mode */ + wr32(E1000_IAM, IMS_ENABLE_MASK); + goto request_done; + } + /* fall back to MSI */ + igb_reset_interrupt_capability(adapter); + if (!pci_enable_msi(adapter->pdev)) + adapter->msi_enabled = 1; + igb_free_all_tx_resources(adapter); + igb_free_all_rx_resources(adapter); + adapter->num_rx_queues = 1; + igb_alloc_queues(adapter); + } + if (adapter->msi_enabled) { + err = request_irq(adapter->pdev->irq, &igb_intr_msi, 0, + netdev->name, netdev); + if (!err) + goto request_done; + /* fall back to legacy interrupts */ + igb_reset_interrupt_capability(adapter); + adapter->msi_enabled = 0; + } + + err = request_irq(adapter->pdev->irq, &igb_intr, IRQF_SHARED, + netdev->name, netdev); + + if (err) { + dev_err(&adapter->pdev->dev, "Error %d getting interrupt\n", + err); + goto request_done; + } + + /* enable IAM, auto-mask */ + wr32(E1000_IAM, IMS_ENABLE_MASK); + +request_done: + return err; +} + +static void igb_free_irq(struct igb_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + + if (adapter->msix_entries) { + int vector = 0, i; + + for (i = 0; i < adapter->num_tx_queues; i++) + free_irq(adapter->msix_entries[vector++].vector, + &(adapter->tx_ring[i])); + for (i = 0; i < adapter->num_rx_queues; i++) + free_irq(adapter->msix_entries[vector++].vector, + &(adapter->rx_ring[i])); + + free_irq(adapter->msix_entries[vector++].vector, netdev); + return; + } + + free_irq(adapter->pdev->irq, netdev); +} + +/** + * igb_irq_disable - Mask off interrupt generation on the NIC + * @adapter: board private structure + **/ +static void igb_irq_disable(struct igb_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + + if (adapter->msix_entries) { + wr32(E1000_EIMC, ~0); + wr32(E1000_EIAC, 0); + } + wr32(E1000_IMC, ~0); + wrfl(); + synchronize_irq(adapter->pdev->irq); +} + +/** + * igb_irq_enable - Enable default interrupt generation settings + * @adapter: board private structure + **/ +static void igb_irq_enable(struct igb_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + + if (adapter->msix_entries) { + wr32(E1000_EIMS, + adapter->eims_enable_mask); + wr32(E1000_EIAC, + adapter->eims_enable_mask); + wr32(E1000_IMS, E1000_IMS_LSC); + } else + wr32(E1000_IMS, IMS_ENABLE_MASK); +} + +static void igb_update_mng_vlan(struct igb_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + u16 vid = adapter->hw.mng_cookie.vlan_id; + u16 old_vid = adapter->mng_vlan_id; + if (adapter->vlgrp) { + if (!vlan_group_get_device(adapter->vlgrp, vid)) { + if (adapter->hw.mng_cookie.status & + E1000_MNG_DHCP_COOKIE_STATUS_VLAN) { + igb_vlan_rx_add_vid(netdev, vid); + adapter->mng_vlan_id = vid; + } else + adapter->mng_vlan_id = IGB_MNG_VLAN_NONE; + + if ((old_vid != (u16)IGB_MNG_VLAN_NONE) && + (vid != old_vid) && + !vlan_group_get_device(adapter->vlgrp, old_vid)) + igb_vlan_rx_kill_vid(netdev, old_vid); + } else + adapter->mng_vlan_id = vid; + } +} + +/** + * igb_release_hw_control - release control of the h/w to f/w + * @adapter: address of board private structure + * + * igb_release_hw_control resets CTRL_EXT:DRV_LOAD bit. + * For ASF and Pass Through versions of f/w this means that the + * driver is no longer loaded. + * + **/ +static void igb_release_hw_control(struct igb_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + u32 ctrl_ext; + + /* Let firmware take over control of h/w */ + ctrl_ext = rd32(E1000_CTRL_EXT); + wr32(E1000_CTRL_EXT, + ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD); +} + + +/** + * igb_get_hw_control - get control of the h/w from f/w + * @adapter: address of board private structure + * + * igb_get_hw_control sets CTRL_EXT:DRV_LOAD bit. + * For ASF and Pass Through versions of f/w this means that + * the driver is loaded. + * + **/ +static void igb_get_hw_control(struct igb_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + u32 ctrl_ext; + + /* Let firmware know the driver has taken over */ + ctrl_ext = rd32(E1000_CTRL_EXT); + wr32(E1000_CTRL_EXT, + ctrl_ext | E1000_CTRL_EXT_DRV_LOAD); +} + +static void igb_init_manageability(struct igb_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + + if (adapter->en_mng_pt) { + u32 manc2h = rd32(E1000_MANC2H); + u32 manc = rd32(E1000_MANC); + + /* disable hardware interception of ARP */ + manc &= ~(E1000_MANC_ARP_EN); + + /* enable receiving management packets to the host */ + /* this will probably generate destination unreachable messages + * from the host OS, but the packets will be handled on SMBUS */ + manc |= E1000_MANC_EN_MNG2HOST; +#define E1000_MNG2HOST_PORT_623 (1 << 5) +#define E1000_MNG2HOST_PORT_664 (1 << 6) + manc2h |= E1000_MNG2HOST_PORT_623; + manc2h |= E1000_MNG2HOST_PORT_664; + wr32(E1000_MANC2H, manc2h); + + wr32(E1000_MANC, manc); + } +} + +static void igb_release_manageability(struct igb_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + + if (adapter->en_mng_pt) { + u32 manc = rd32(E1000_MANC); + + /* re-enable hardware interception of ARP */ + manc |= E1000_MANC_ARP_EN; + manc &= ~E1000_MANC_EN_MNG2HOST; + + /* don't explicitly have to mess with MANC2H since + * MANC has an enable disable that gates MANC2H */ + + /* XXX stop the hardware watchdog ? */ + wr32(E1000_MANC, manc); + } +} + +/** + * igb_configure - configure the hardware for RX and TX + * @adapter: private board structure + **/ +static void igb_configure(struct igb_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + int i; + + igb_get_hw_control(adapter); + igb_set_multi(netdev); + + igb_restore_vlan(adapter); + igb_init_manageability(adapter); + + igb_configure_tx(adapter); + igb_setup_rctl(adapter); + igb_configure_rx(adapter); + /* call IGB_DESC_UNUSED which always leaves + * at least 1 descriptor unused to make sure + * next_to_use != next_to_clean */ + for (i = 0; i < adapter->num_rx_queues; i++) { + struct igb_ring *ring = &adapter->rx_ring[i]; + igb_alloc_rx_buffers_adv(adapter, ring, IGB_DESC_UNUSED(ring)); + } + + + adapter->tx_queue_len = netdev->tx_queue_len; +} + + +/** + * igb_up - Open the interface and prepare it to handle traffic + * @adapter: board private structure + **/ + +int igb_up(struct igb_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + int i; + + /* hardware has been reset, we need to reload some things */ + igb_configure(adapter); + + clear_bit(__IGB_DOWN, &adapter->state); + + napi_enable(&adapter->napi); + + if (adapter->msix_entries) { + for (i = 0; i < adapter->num_rx_queues; i++) + napi_enable(&adapter->rx_ring[i].napi); + igb_configure_msix(adapter); + } + + /* Clear any pending interrupts. */ + rd32(E1000_ICR); + igb_irq_enable(adapter); + + /* Fire a link change interrupt to start the watchdog. */ + wr32(E1000_ICS, E1000_ICS_LSC); + return 0; +} + +void igb_down(struct igb_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + struct net_device *netdev = adapter->netdev; + u32 tctl, rctl; + int i; + + /* signal that we're down so the interrupt handler does not + * reschedule our watchdog timer */ + set_bit(__IGB_DOWN, &adapter->state); + + /* disable receives in the hardware */ + rctl = rd32(E1000_RCTL); + wr32(E1000_RCTL, rctl & ~E1000_RCTL_EN); + /* flush and sleep below */ + + netif_stop_queue(netdev); + + /* disable transmits in the hardware */ + tctl = rd32(E1000_TCTL); + tctl &= ~E1000_TCTL_EN; + wr32(E1000_TCTL, tctl); + /* flush both disables and wait for them to finish */ + wrfl(); + msleep(10); + + napi_disable(&adapter->napi); + + if (adapter->msix_entries) + for (i = 0; i < adapter->num_rx_queues; i++) + napi_disable(&adapter->rx_ring[i].napi); + igb_irq_disable(adapter); + + del_timer_sync(&adapter->watchdog_timer); + del_timer_sync(&adapter->phy_info_timer); + + netdev->tx_queue_len = adapter->tx_queue_len; + netif_carrier_off(netdev); + adapter->link_speed = 0; + adapter->link_duplex = 0; + + igb_reset(adapter); + igb_clean_all_tx_rings(adapter); + igb_clean_all_rx_rings(adapter); +} + +void igb_reinit_locked(struct igb_adapter *adapter) +{ + WARN_ON(in_interrupt()); + while (test_and_set_bit(__IGB_RESETTING, &adapter->state)) + msleep(1); + igb_down(adapter); + igb_up(adapter); + clear_bit(__IGB_RESETTING, &adapter->state); +} + +void igb_reset(struct igb_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + struct e1000_fc_info *fc = &adapter->hw.fc; + u32 pba = 0, tx_space, min_tx_space, min_rx_space; + u16 hwm; + + /* Repartition Pba for greater than 9k mtu + * To take effect CTRL.RST is required. + */ + pba = E1000_PBA_34K; + + if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) { + /* adjust PBA for jumbo frames */ + wr32(E1000_PBA, pba); + + /* To maintain wire speed transmits, the Tx FIFO should be + * large enough to accommodate two full transmit packets, + * rounded up to the next 1KB and expressed in KB. Likewise, + * the Rx FIFO should be large enough to accommodate at least + * one full receive packet and is similarly rounded up and + * expressed in KB. */ + pba = rd32(E1000_PBA); + /* upper 16 bits has Tx packet buffer allocation size in KB */ + tx_space = pba >> 16; + /* lower 16 bits has Rx packet buffer allocation size in KB */ + pba &= 0xffff; + /* the tx fifo also stores 16 bytes of information about the tx + * but don't include ethernet FCS because hardware appends it */ + min_tx_space = (adapter->max_frame_size + + sizeof(struct e1000_tx_desc) - + ETH_FCS_LEN) * 2; + min_tx_space = ALIGN(min_tx_space, 1024); + min_tx_space >>= 10; + /* software strips receive CRC, so leave room for it */ + min_rx_space = adapter->max_frame_size; + min_rx_space = ALIGN(min_rx_space, 1024); + min_rx_space >>= 10; + + /* If current Tx allocation is less than the min Tx FIFO size, + * and the min Tx FIFO size is less than the current Rx FIFO + * allocation, take space away from current Rx allocation */ + if (tx_space < min_tx_space && + ((min_tx_space - tx_space) < pba)) { + pba = pba - (min_tx_space - tx_space); + + /* if short on rx space, rx wins and must trump tx + * adjustment */ + if (pba < min_rx_space) + pba = min_rx_space; + } + } + wr32(E1000_PBA, pba); + + /* flow control settings */ + /* The high water mark must be low enough to fit one full frame + * (or the size used for early receive) above it in the Rx FIFO. + * Set it to the lower of: + * - 90% of the Rx FIFO size, or + * - the full Rx FIFO size minus one full frame */ + hwm = min(((pba << 10) * 9 / 10), + ((pba << 10) - adapter->max_frame_size)); + + fc->high_water = hwm & 0xFFF8; /* 8-byte granularity */ + fc->low_water = fc->high_water - 8; + fc->pause_time = 0xFFFF; + fc->send_xon = 1; + fc->type = fc->original_type; + + /* Allow time for pending master requests to run */ + adapter->hw.mac.ops.reset_hw(&adapter->hw); + wr32(E1000_WUC, 0); + + if (adapter->hw.mac.ops.init_hw(&adapter->hw)) + dev_err(&adapter->pdev->dev, "Hardware Error\n"); + + igb_update_mng_vlan(adapter); + + /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ + wr32(E1000_VET, ETHERNET_IEEE_VLAN_TYPE); + + igb_reset_adaptive(&adapter->hw); + adapter->hw.phy.ops.get_phy_info(&adapter->hw); + igb_release_manageability(adapter); +} + +/** + * igb_probe - Device Initialization Routine + * @pdev: PCI device information struct + * @ent: entry in igb_pci_tbl + * + * Returns 0 on success, negative on failure + * + * igb_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 igb_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct net_device *netdev; + struct igb_adapter *adapter; + struct e1000_hw *hw; + const struct e1000_info *ei = igb_info_tbl[ent->driver_data]; + unsigned long mmio_start, mmio_len; + static int cards_found; + int i, err, pci_using_dac; + u16 eeprom_data = 0; + u16 eeprom_apme_mask = IGB_EEPROM_APME; + u32 part_num; + + err = pci_enable_device(pdev); + if (err) + return err; + + pci_using_dac = 0; + err = pci_set_dma_mask(pdev, DMA_64BIT_MASK); + if (!err) { + err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK); + if (!err) + pci_using_dac = 1; + } else { + err = pci_set_dma_mask(pdev, DMA_32BIT_MASK); + if (err) { + err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); + if (err) { + dev_err(&pdev->dev, "No usable DMA " + "configuration, aborting\n"); + goto err_dma; + } + } + } + + err = pci_request_regions(pdev, igb_driver_name); + if (err) + goto err_pci_reg; + + pci_set_master(pdev); + + err = -ENOMEM; + netdev = alloc_etherdev(sizeof(struct igb_adapter)); + if (!netdev) + goto err_alloc_etherdev; + + SET_NETDEV_DEV(netdev, &pdev->dev); + + pci_set_drvdata(pdev, netdev); + adapter = netdev_priv(netdev); + adapter->netdev = netdev; + adapter->pdev = pdev; + hw = &adapter->hw; + hw->back = adapter; + adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE; + + mmio_start = pci_resource_start(pdev, 0); + mmio_len = pci_resource_len(pdev, 0); + + err = -EIO; + adapter->hw.hw_addr = ioremap(mmio_start, mmio_len); + if (!adapter->hw.hw_addr) + goto err_ioremap; + + netdev->open = &igb_open; + netdev->stop = &igb_close; + netdev->get_stats = &igb_get_stats; + netdev->set_multicast_list = &igb_set_multi; + netdev->set_mac_address = &igb_set_mac; + netdev->change_mtu = &igb_change_mtu; + netdev->do_ioctl = &igb_ioctl; + igb_set_ethtool_ops(netdev); + netdev->tx_timeout = &igb_tx_timeout; + netdev->watchdog_timeo = 5 * HZ; + netif_napi_add(netdev, &adapter->napi, igb_clean, 64); + netdev->vlan_rx_register = igb_vlan_rx_register; + netdev->vlan_rx_add_vid = igb_vlan_rx_add_vid; + netdev->vlan_rx_kill_vid = igb_vlan_rx_kill_vid; +#ifdef CONFIG_NET_POLL_CONTROLLER + netdev->poll_controller = igb_netpoll; +#endif + netdev->hard_start_xmit = &igb_xmit_frame_adv; + + strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); + + netdev->mem_start = mmio_start; + netdev->mem_end = mmio_start + mmio_len; + + adapter->bd_number = cards_found; + + /* PCI config space info */ + hw->vendor_id = pdev->vendor; + hw->device_id = pdev->device; + hw->revision_id = pdev->revision; + hw->subsystem_vendor_id = pdev->subsystem_vendor; + hw->subsystem_device_id = pdev->subsystem_device; + + /* setup the private structure */ + hw->back = adapter; + /* Copy the default MAC, PHY and NVM function pointers */ + memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops)); + memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops)); + memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops)); + /* Initialize skew-specific constants */ + err = ei->get_invariants(hw); + if (err) + goto err_hw_init; + + err = igb_sw_init(adapter); + if (err) + goto err_sw_init; + + igb_get_bus_info_pcie(hw); + + hw->phy.autoneg_wait_to_complete = false; + hw->mac.adaptive_ifs = true; + + /* Copper options */ + if (hw->phy.media_type == e1000_media_type_copper) { + hw->phy.mdix = AUTO_ALL_MODES; + hw->phy.disable_polarity_correction = false; + hw->phy.ms_type = e1000_ms_hw_default; + } + + if (igb_check_reset_block(hw)) + dev_info(&pdev->dev, + "PHY reset is blocked due to SOL/IDER session.\n"); + + netdev->features = NETIF_F_SG | + NETIF_F_HW_CSUM | + NETIF_F_HW_VLAN_TX | + NETIF_F_HW_VLAN_RX | + NETIF_F_HW_VLAN_FILTER; + + netdev->features |= NETIF_F_TSO; + + netdev->features |= NETIF_F_TSO6; + if (pci_using_dac) + netdev->features |= NETIF_F_HIGHDMA; + + netdev->features |= NETIF_F_LLTX; + adapter->en_mng_pt = igb_enable_mng_pass_thru(&adapter->hw); + + /* before reading the NVM, reset the controller to put the device in a + * known good starting state */ + hw->mac.ops.reset_hw(hw); + + /* make sure the NVM is good */ + if (igb_validate_nvm_checksum(hw) < 0) { + dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n"); + err = -EIO; + goto err_eeprom; + } + + /* copy the MAC address out of the NVM */ + if (hw->mac.ops.read_mac_addr(hw)) + dev_err(&pdev->dev, "NVM Read Error\n"); + + memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len); + memcpy(netdev->perm_addr, hw->mac.addr, netdev->addr_len); + + if (!is_valid_ether_addr(netdev->perm_addr)) { + dev_err(&pdev->dev, "Invalid MAC Address\n"); + err = -EIO; + goto err_eeprom; + } + + init_timer(&adapter->watchdog_timer); + adapter->watchdog_timer.function = &igb_watchdog; + adapter->watchdog_timer.data = (unsigned long) adapter; + + init_timer(&adapter->phy_info_timer); + adapter->phy_info_timer.function = &igb_update_phy_info; + adapter->phy_info_timer.data = (unsigned long) adapter; + + INIT_WORK(&adapter->reset_task, igb_reset_task); + INIT_WORK(&adapter->watchdog_task, igb_watchdog_task); + + /* Initialize link & ring properties that are user-changeable */ + adapter->tx_ring->count = 256; + for (i = 0; i < adapter->num_tx_queues; i++) + adapter->tx_ring[i].count = adapter->tx_ring->count; + adapter->rx_ring->count = 256; + for (i = 0; i < adapter->num_rx_queues; i++) + adapter->rx_ring[i].count = adapter->rx_ring->count; + + adapter->fc_autoneg = true; + hw->mac.autoneg = true; + hw->phy.autoneg_advertised = 0x2f; + + hw->fc.original_type = e1000_fc_default; + hw->fc.type = e1000_fc_default; + + adapter->itr_setting = 3; + adapter->itr = IGB_START_ITR; + + igb_validate_mdi_setting(hw); + + adapter->rx_csum = 1; + + /* Initial Wake on LAN setting If APM wake is enabled in the EEPROM, + * enable the ACPI Magic Packet filter + */ + + if (hw->bus.func == 0 || + hw->device_id == E1000_DEV_ID_82575EB_COPPER) + hw->nvm.ops.read_nvm(hw, NVM_INIT_CONTROL3_PORT_A, 1, + &eeprom_data); + + if (eeprom_data & eeprom_apme_mask) + adapter->eeprom_wol |= E1000_WUFC_MAG; + + /* now that we have the eeprom settings, apply the special cases where + * the eeprom may be wrong or the board simply won't support wake on + * lan on a particular port */ + switch (pdev->device) { + case E1000_DEV_ID_82575GB_QUAD_COPPER: + adapter->eeprom_wol = 0; + break; + case E1000_DEV_ID_82575EB_FIBER_SERDES: + /* Wake events only supported on port A for dual fiber + * regardless of eeprom setting */ + if (rd32(E1000_STATUS) & E1000_STATUS_FUNC_1) + adapter->eeprom_wol = 0; + break; + } + + /* initialize the wol settings based on the eeprom settings */ + adapter->wol = adapter->eeprom_wol; + + /* reset the hardware with the new settings */ + igb_reset(adapter); + + /* let the f/w know that the h/w is now under the control of the + * driver. */ + igb_get_hw_control(adapter); + + /* tell the stack to leave us alone until igb_open() is called */ + netif_carrier_off(netdev); + netif_stop_queue(netdev); + + strcpy(netdev->name, "eth%d"); + err = register_netdev(netdev); + if (err) + goto err_register; + + dev_info(&pdev->dev, "Intel(R) Gigabit Ethernet Network Connection\n"); + /* print bus type/speed/width info */ + dev_info(&pdev->dev, + "%s: (PCIe:%s:%s) %02x:%02x:%02x:%02x:%02x:%02x\n", + netdev->name, + ((hw->bus.speed == e1000_bus_speed_2500) + ? "2.5Gb/s" : "unknown"), + ((hw->bus.width == e1000_bus_width_pcie_x4) + ? "Width x4" : (hw->bus.width == e1000_bus_width_pcie_x1) + ? "Width x1" : "unknown"), + netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2], + netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5]); + + igb_read_part_num(hw, &part_num); + dev_info(&pdev->dev, |