diff options
Diffstat (limited to 'drivers/net/igb/igb_main.c')
| -rw-r--r-- | drivers/net/igb/igb_main.c | 4122 |
1 files changed, 0 insertions, 4122 deletions
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c deleted file mode 100644 index aaee02e9e3f..00000000000 --- a/drivers/net/igb/igb_main.c +++ /dev/null @@ -1,4122 +0,0 @@ -/******************************************************************************* - - 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/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) { - /* enable IAM, auto-mask, - * DO NOT USE EIAM or IAM 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); - -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); - - /* 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); - } -} - -/** - * 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); - if (adapter->hw.phy.ops.get_phy_info) - adapter->hw.phy.ops.get_phy_info(&adapter->hw); -} - -/** - * 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, "%s: PBA No: %06x-%03x\n", netdev->name, - (part_num >> 8), (part_num & 0xff)); - - dev_info(&pdev->dev, - "Using %s interrupts. %d rx queue(s), %d tx queue(s)\n", - adapter->msix_entries ? "MSI-X" : - adapter->msi_enabled ? "MSI" : "legacy", - adapter->num_rx_queues, adapter->num_tx_queues); - - cards_found++; - return 0; - -err_register: - igb_release_hw_control(adapter); -err_eeprom: - if (!igb_check_reset_block(hw)) - hw->phy.ops.reset_phy(hw); - - if (hw->flash_address) - iounmap(hw->flash_address); - - igb_remove_device(hw); - kfree(adapter->tx_ring); - kfree(adapter->rx_ring); -err_sw_init: -err_hw_init: - iounmap(hw->hw_addr); -err_ioremap: - free_netdev(netdev); -err_alloc_etherdev: - pci_release_regions(pdev); -err_pci_reg: -err_dma: - pci_disable_device(pdev); - return err; -} - -/** - * igb_remove - Device Removal Routine - * @pdev: PCI device information struct - * - * igb_remove is called by the PCI subsystem to alert the driver - * that it should release a PCI device. The could be caused by a - * Hot-Plug event, or because the driver is going to be removed from - * memory. - **/ -static void __devexit igb_remove(struct pci_dev *pdev) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct igb_adapter *adapter = netdev_priv(netdev); - - /* flush_scheduled work may reschedule our watchdog task, so - * explicitly disable watchdog tasks from being rescheduled */ - set_bit(__IGB_DOWN, &adapter->state); - del_timer_sync(&adapter->watchdog_timer); - del_timer_sync(&adapter->phy_info_timer); - - flush_scheduled_work(); - - /* Release control of h/w to f/w. If f/w is AMT enabled, this - * would have already happened in close and is redundant. */ - igb_release_hw_control(adapter); - - unregister_netdev(netdev); - - if (!igb_check_reset_block(&adapter->hw)) - adapter->hw.phy.ops.reset_phy(&adapter->hw); - - igb_remove_device(&adapter->hw); - igb_reset_interrupt_capability(adapter); - - kfree(adapter->tx_ring); - kfree(adapter->rx_ring); - - iounmap(adapter->hw.hw_addr); - if (adapter->hw.flash_address) - iounmap(adapter->hw.flash_address); - pci_release_regions(pdev); - - free_netdev(netdev); - - pci_disable_device(pdev); -} - -/** - * igb_sw_init - Initialize general software structures (struct igb_adapter) - * @adapter: board private structure to initialize - * - * igb_sw_init initializes the Adapter private data structure. - * Fields are initialized based on PCI device information and - * OS network device settings (MTU size). - **/ -static int __devinit igb_sw_init(struct igb_adapter *adapter) -{ - struct e1000_hw *hw = &adapter->hw; - struct net_device *netdev = adapter->netdev; - struct pci_dev *pdev = adapter->pdev; - - pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word); - - adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; - adapter->rx_ps_hdr_size = 0; /* disable packet split */ - adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; - adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; - - /* Number of supported queues. */ - /* Having more queues than CPUs doesn't make sense. */ - adapter->num_tx_queues = 1; - adapter->num_rx_queues = min(IGB_MAX_RX_QUEUES, num_online_cpus()); - - igb_set_interrupt_capability(adapter); - - if (igb_alloc_queues(adapter)) { - dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); - return -ENOMEM; - } - - /* Explicitly disable IRQ since the NIC can be in any state. */ - igb_irq_disable(adapter); - - set_bit(__IGB_DOWN, &adapter->state); - return 0; -} - -/** - * igb_open - Called when a network interface is made active - * @netdev: network interface device structure - * - * Returns 0 on success, negative value on failure - * - * The open entry point is called when a network interface is made - * active by the system (IFF_UP). At this point all resources needed - * for transmit and receive operations are allocated, the interrupt - * handler is registered with the OS, the watchdog timer is started, - * and the stack is notified that the interface is ready. - **/ -static int igb_open(struct net_device *netdev) -{ - struct igb_adapter *adapter = netdev_priv(netdev); - struct e1000_hw *hw = &adapter->hw; - int err; - int i; - - /* disallow open during test */ - if (test_bit(__IGB_TESTING, &adapter->state)) - return -EBUSY; - - /* allocate transmit descriptors */ - err = igb_setup_all_tx_resources(adapter); - if (err) - goto err_setup_tx; - - /* allocate receive descriptors */ - err = igb_setup_all_rx_resources(adapter); - if (err) - goto err_setup_rx; - - /* e1000_power_up_phy(adapter); */ - - adapter->mng_vlan_id = IGB_MNG_VLAN_NONE; - if ((adapter->hw.mng_cookie.status & - E1000_MNG_DHCP_COOKIE_STATUS_VLAN)) - igb_update_mng_vlan(adapter); - - /* before we allocate an interrupt, we must be ready to handle it. - * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt - * as soon as we call pci_request_irq, so we have to setup our - * clean_rx handler before we do so. */ - igb_configure(adapter); - - err = igb_request_irq(adapter); - if (err) - goto err_req_irq; - - /* From here on the code is the same as igb_up() */ - 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_irq_enable(adapter); - - /* Clear any pending interrupts. */ - rd32(E1000_ICR); - /* Fire a link status change interrupt to start the watchdog. */ - wr32(E1000_ICS, E1000_ICS_LSC); - - return 0; - -err_req_irq: - igb_release_hw_control(adapter); - /* e1000_power_down_phy(adapter); */ - igb_free_all_rx_resources(adapter); -err_setup_rx: - igb_free_all_tx_resources(adapter); -err_setup_tx: - igb_reset(adapter); - - return err; -} - -/** - * igb_close - Disables a network interface - * @netdev: network interface device structure - * - * Returns 0, this is not allowed to fail - * - * The close entry point is called when an interface is de-activated - * by the OS. The hardware is still under the driver's control, but - * needs to be disabled. A global MAC reset is issued to stop the - * hardware, and all transmit and receive resources are freed. - **/ -static int igb_close(struct net_device *netdev) -{ - struct igb_adapter *adapter = netdev_priv(netdev); - - WARN_ON(test_bit(__IGB_RESETTING, &adapter->state)); - igb_down(adapter); - - igb_free_irq(adapter); - - igb_free_all_tx_resources(adapter); - igb_free_all_rx_resources(adapter); - - /* kill manageability vlan ID if supported, but not if a vlan with - * the same ID is registered on the host OS (let 8021q kill it) */ - if ((adapter->hw.mng_cookie.status & - E1000_MNG_DHCP_COOKIE_STATUS_VLAN) && - !(adapter->vlgrp && - vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) - igb_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id); - - return 0; -} - -/** - * igb_setup_tx_resources - allocate Tx resources (Descriptors) - * @adapter: board private structure - * @tx_ring: tx descriptor ring (for a specific queue) to setup - * - * Return 0 on success, negative on failure - **/ - -int igb_setup_tx_resources(struct igb_adapter *adapter, - struct igb_ring *tx_ring) -{ - struct pci_dev *pdev = adapter->pdev; - int size; - - size = sizeof(struct igb_buffer) * tx_ring->count; - tx_ring->buffer_info = vmalloc(size); - if (!tx_ring->buffer_info) - goto err; - memset(tx_ring->buffer_info, 0, size); - - /* round up to nearest 4K */ - tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc) - + sizeof(u32); - tx_ring->size = ALIGN(tx_ring->size, 4096); - - tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size, - &tx_ring->dma); - - if (!tx_ring->desc) - goto err; - - tx_ring->adapter = adapter; - tx_ring->next_to_use = 0; - tx_ring->next_to_clean = 0; - spin_lock_init(&tx_ring->tx_clean_lock); - spin_lock_init(&tx_ring->tx_lock); - return 0; - -err: - vfree(tx_ring->buffer_info); - dev_err(&adapter->pdev->dev, - "Unable to allocate memory for the transmit descriptor ring\n"); - return -ENOMEM; -} - -/** - * igb_setup_all_tx_resources - wrapper to allocate Tx resources - * (Descriptors) for all queues - * @adapter: board private structure - * - * Return 0 on success, negative on failure - **/ -static int igb_setup_all_tx_resources(struct igb_adapter *adapter) -{ - int i, err = 0; - - for (i = 0; i < adapter->num_tx_queues; i++) { - err = igb_setup_tx_resources(adapter, &adapter->tx_ring[i]); - if (err) { - dev_err(&adapter->pdev->dev, - "Allocation for Tx Queue %u failed\n", i); - for (i--; i >= 0; i--) - igb_free_tx_resources(adapter, - &adapter->tx_ring[i]); - break; - } - } - - return err; -} - -/** - * igb_configure_tx - Configure transmit Unit after Reset - * @adapter: board private structure - * - * Configure the Tx unit of the MAC after a reset. - **/ -static void igb_configure_tx(struct igb_adapter *adapter) -{ - u64 tdba, tdwba; - struct e1000_hw *hw = &adapter->hw; - u32 tctl; - u32 txdctl, txctrl; - int i; - - for (i = 0; i < adapter->num_tx_queues; i++) { - struct igb_ring *ring = &(adapter->tx_ring[i]); - - wr32(E1000_TDLEN(i), - ring->count * sizeof(struct e1000_tx_desc)); - tdba = ring->dma; - wr32(E1000_TDBAL(i), - tdba & 0x00000000ffffffffULL); - wr32(E1000_TDBAH(i), tdba >> 32); - - tdwba = ring->dma + ring->count * sizeof(struct e1000_tx_desc); - tdwba |= 1; /* enable head wb */ - wr32(E1000_TDWBAL(i), - tdwba & 0x00000000ffffffffULL); - wr32(E1000_TDWBAH(i), tdwba >> 32); - - ring->head = E1000_TDH(i); - ring->tail = E1000_TDT(i); - writel(0, hw->hw_addr + ring->tail); - writel(0, hw->hw_addr + ring->head); - txdctl = rd32(E1000_TXDCTL(i)); - txdctl |= E1000_TXDCTL_QUEUE_ENABLE; - wr32(E1000_TXDCTL(i), txdctl); - - /* Turn off Relaxed Ordering on head write-backs. The - * writebacks MUST be delivered in order or it will - * completely screw up our bookeeping. - */ - txctrl = rd32(E1000_DCA_TXCTRL(i)); - txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN; - wr32(E1000_DCA_TXCTRL(i), txctrl); - } - - - - /* Use the default values for the Tx Inter Packet Gap (IPG) timer */ - - /* Program the Transmit Control Register */ - - tctl = rd32(E1000_TCTL); - tctl &= ~E1000_TCTL_CT; - tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC | - (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT); - - igb_config_collision_dist(hw); - - /* Setup Transmit Descriptor Settings for eop descriptor */ - adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_RS; - - /* Enable transmits */ - tctl |= E1000_TCTL_EN; - - wr32(E1000_TCTL, tctl); -} - -/** - * igb_setup_rx_resources - allocate Rx resources (Descriptors) - * @adapter: board private structure - * @rx_ring: rx descriptor ring (for a specific queue) to setup - * - * Returns 0 on success, negative on failure - **/ - -int igb_setup_rx_resources(struct igb_adapter *adapter, - struct igb_ring *rx_ring) -{ - struct pci_dev *pdev = adapter->pdev; - int size, desc_len; - - size = sizeof(struct igb_buffer) * rx_ring->count; - rx_ring->buffer_info = vmalloc(size); - if (!rx_ring->buffer_info) - goto err; - memset(rx_ring->buffer_info, 0, size); - - desc_len = sizeof(union e1000_adv_rx_desc); - - /* Round up to nearest 4K */ - rx_ring->size = rx_ring->count * desc_len; - rx_ring->size = ALIGN(rx_ring->size, 4096); - - rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, - &rx_ring->dma); - - if (!rx_ring->desc) - goto err; - - rx_ring->next_to_clean = 0; - rx_ring->next_to_use = 0; - rx_ring->pending_skb = NULL; - - rx_ring->adapter = adapter; - /* FIXME: do we want to setup ring->napi->poll here? */ - rx_ring->napi.poll = adapter->napi.poll; - - return 0; - -err: - vfree(rx_ring->buffer_info); - dev_err(&adapter->pdev->dev, "Unable to allocate memory for " - "the receive descriptor ring\n"); - return -ENOMEM; -} - -/** - * igb_setup_all_rx_resources - wrapper to allocate Rx resources - * (Descriptors) for all queues - * @adapter: board private structure - * - * Return 0 on success, negative on failure - **/ -static int igb_setup_all_rx_resources(struct igb_adapter *adapter) -{ - int i, err = 0; - - for (i = 0; i < adapter->num_rx_queues; i++) { - err = igb_setup_rx_resources(adapter, &adapter->rx_ring[i]); - if (err) { - dev_err(&adapter->pdev->dev, - "Allocation for Rx Queue %u failed\n", i); - for (i--; i >= 0; i--) - igb_free_rx_resources(adapter, - &adapter->rx_ring[i]); - break; - } - } - - return err; -} - -/** - * igb_setup_rctl - configure the receive control registers - * @adapter: Board private structure - **/ -static void igb_setup_rctl(struct igb_adapter *adapter) -{ - struct e1000_hw *hw = &adapter->hw; - u32 rctl; - u32 srrctl = 0; - int i; - - rctl = rd32(E1000_RCTL); - - rctl &= ~(3 << E1000_RCTL_MO_SHIFT); - - rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | - E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF | - (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT); - - /* disable the stripping of CRC because it breaks - * BMC firmware connected over SMBUS - rctl |= E1000_RCTL_SECRC; - */ - - rctl &= ~E1000_RCTL_SBP; - - if (adapter->netdev->mtu <= ETH_DATA_LEN) - rctl &= ~E1000_RCTL_LPE; - else - rctl |= E1000_RCTL_LPE; - if (adapter->rx_buffer_len <= IGB_RXBUFFER_2048) { - /* Setup buffer sizes */ - rctl &= ~E1000_RCTL_SZ_4096; - rctl |= E1000_RCTL_BSEX; - switch (adapter->rx_buffer_len) { - case IGB_RXBUFFER_256: - rctl |= E1000_RCTL_SZ_256; - rctl &= ~E1000_RCTL_BSEX; - break; - case IGB_RXBUFFER_512: - rctl |= E1000_RCTL_SZ_512; - rctl &= ~E1000_RCTL_BSEX; - break; - case IGB_RXBUFFER_1024: - rctl |= E1000_RCTL_SZ_1024; - rctl &= ~E1000_RCTL_BSEX; - break; - case IGB_RXBUFFER_2048: - default: - rctl |= E1000_RCTL_SZ_2048; - rctl &= ~E1000_RCTL_BSEX; - break; - case IGB_RXBUFFER_4096: - rctl |= E1000_RCTL_SZ_4096; - break; - case IGB_RXBUFFER_8192: - rctl |= E1000_RCTL_SZ_8192; - break; - case IGB_RXBUFFER_16384: - rctl |= E1000_RCTL_SZ_16384; - break; - } - } else { - rctl &= ~E1000_RCTL_BSEX; - srrctl = adapter->rx_buffer_len >> E1000_SRRCTL_BSIZEPKT_SHIFT; - } - - /* 82575 and greater support packet-split where the protocol - * header is placed in skb->data and the packet data is - * placed in pages hanging off of skb_shinfo(skb)->nr_frags. - * In the case of a non-split, skb->data is linearly filled, - * followed by the page buffers. Therefore, skb->data is - * sized to hold the largest protocol header. - */ - /* allocations using alloc_page take too long for regular MTU - * so only enable packet split for jumbo frames */ - if (rctl & E1000_RCTL_LPE) { - adapter->rx_ps_hdr_size = IGB_RXBUFFER_128; - srrctl = adapter->rx_ps_hdr_size << - E1000_SRRCTL_BSIZEHDRSIZE_SHIFT; - /* buffer size is ALWAYS one page */ - srrctl |= PAGE_SIZE >> E1000_SRRCTL_BSIZEPKT_SHIFT; - srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS; - } else { - adapter->rx_ps_hdr_size = 0; - srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF; - } - - for (i = 0; i < adapter->num_rx_queues; i++) - wr32(E1000_SRRCTL(i), srrctl); - - wr32(E1000_RCTL, rctl); -} - -/** - * igb_configure_rx - Configure receive Unit after Reset - * @adapter: board private structure - * - * Configure the Rx unit of the MAC after a reset. - **/ -static void igb_configure_rx(struct igb_adapter *adapter) -{ - u64 rdba; - struct e1000_hw *hw = &adapter->hw; - u32 rctl, rxcsum; - u32 rxdctl; - int i; - - /* disable receives while setting up the descriptors */ - rctl = rd32(E1000_RCTL); - wr32(E1000_RCTL, rctl & ~E1000_RCTL_EN); - wrfl(); - mdelay(10); - - if (adapter->itr_setting > 3) - wr32(E1000_ITR, - 1000000000 / (adapter->itr * 256)); - - /* Setup the HW Rx Head and Tail Descriptor Pointers and - * the Base and Length of the Rx Descriptor Ring */ - for (i = 0; i < adapter->num_rx_queues; i++) { - struct igb_ring *ring = &(adapter->rx_ring[i]); - rdba = ring->dma; - wr32(E1000_RDBAL(i), - rdba & 0x00000000ffffffffULL); - wr32(E1000_RDBAH(i), rdba >> 32); - wr32(E1000_RDLEN(i), - ring->count * sizeof(union e1000_adv_rx_desc)); - - ring->head = E1000_RDH(i); - ring->tail = E1000_RDT(i); - writel(0, hw->hw_addr + ring->tail); - writel(0, hw->hw_addr + ring->head); - - rxdctl = rd32(E1000_RXDCTL(i)); - rxdctl |= E1000_RXDCTL_QUEUE_ENABLE; - rxdctl &= 0xFFF00000; - rxdctl |= IGB_RX_PTHRESH; - rxdctl |= IGB_RX_HTHRESH << 8; - rxdctl |= IGB_RX_WTHRESH << 16; - wr32(E1000_RXDCTL(i), rxdctl); - } - - if (adapter->num_rx_queues > 1) { - u32 random[10]; - u32 mrqc; - u32 j, shift; - union e1000_reta { - u32 dword; - u8 bytes[4]; - } reta; - - get_random_bytes(&random[0], 40); - - shift = 6; - for (j = 0; j < (32 * 4); j++) { - reta.bytes[j & 3] = - (j % adapter->num_rx_queues) << shift; - if ((j & 3) == 3) - writel(reta.dword, - hw->hw_addr + E1000_RETA(0) + (j & ~3)); - } - mrqc = E1000_MRQC_ENABLE_RSS_4Q; - - /* Fill out hash function seeds */ - for (j = 0; j < 10; j++) - array_wr32(E1000_RSSRK(0), j, random[j]); - - mrqc |= (E1000_MRQC_RSS_FIELD_IPV4 | - E1000_MRQC_RSS_FIELD_IPV4_TCP); - mrqc |= (E1000_MRQC_RSS_FIELD_IPV6 | - E1000_MRQC_RSS_FIELD_IPV6_TCP); - mrqc |= (E1000_MRQC_RSS_FIELD_IPV4_UDP | - E1000_MRQC_RSS_FIELD_IPV6_UDP); - mrqc |= (E1000_MRQC_RSS_FIELD_IPV6_UDP_EX | - E1000_MRQC_RSS_FIELD_IPV6_TCP_EX); - - - wr32(E1000_MRQC, mrqc); - - /* Multiqueue and raw packet checksumming are mutually - * exclusive. Note that this not the same as TCP/IP - * checksumming, which works fine. */ - rxcsum = rd32(E1000_RXCSUM); - rxcsum |= E1000_RXCSUM_PCSD; - wr32(E1000_RXCSUM, rxcsum); - } else { - /* Enable Receive Checksum Offload for TCP and UDP */ - rxcsum = rd32(E1000_RXCSUM); - if (adapter->rx_csum) { - rxcsum |= E1000_RXCSUM_TUOFL; - - /* Enable IPv4 payload checksum for UDP fragments - * Must be used in conjunction with packet-split. */ - if (adapter->rx_ps_hdr_size) - rxcsum |= E1000_RXCSUM_IPPCSE; - } else { - rxcsum &= ~E1000_RXCSUM_TUOFL; - /* don't need to clear IPPCSE as it defaults to 0 */ - } - wr32(E1000_RXCSUM, rxcsum); - } - - if (adapter->vlgrp) - wr32(E1000_RLPML, - adapter->max_frame_size + VLAN_TAG_SIZE); - else - wr32(E1000_RLPML, adapter->max_frame_size); - - /* Enable Receives */ - wr32(E1000_RCTL, rctl); -} - -/** - * igb_free_tx_resources - Free Tx Resources per Queue - * @adapter: board private structure - * @tx_ring: Tx descriptor ring for a specific queue - * - * Free all transmit software resources - **/ -static void igb_free_tx_resources(struct igb_adapter *adapter, - struct igb_ring *tx_ring) -{ - struct pci_dev *pdev = adapter->pdev; - - igb_clean_tx_ring(adapter, tx_ring); - - vfree(tx_ring->buffer_info); - tx_ring->buffer_info = NULL; - - pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma); - - tx_ring->desc = NULL; -} - -/** - * igb_free_all_tx_resources - Free Tx Resources for All Queues - * @adapter: board private structure - * - * Free all transmit software resources - **/ -static void igb_free_all_tx_resources(struct igb_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_tx_queues; i++) - igb_free_tx_resources(adapter, &adapter->tx_ring[i]); -} - -static void igb_unmap_and_free_tx_resource(struct igb_adapter *adapter, - struct igb_buffer *buffer_info) -{ - if (buffer_info->dma) { - pci_unmap_page(adapter->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; - } - buffer_info->time_stamp = 0; - /* buffer_info must be completely set up in the transmit path */ -} - -/** - * igb_clean_tx_ring - Free Tx Buffers - * @adapter: board private structure - * @tx_ring: ring to be cleaned - **/ -static void igb_clean_tx_ring(struct igb_adapter *adapter, - struct igb_ring *tx_ring) -{ - struct igb_buffer *buffer_info; - unsigned long size; - unsigned int i; - - if (!tx_ring->buffer_info) - return; - /* Free all the Tx ring sk_buffs */ - - for (i = 0; i < tx_ring->count; i++) { - buffer_info = &tx_ring->buffer_info[i]; - igb_unmap_and_free_tx_resource(adapter, buffer_info); - } - - size = sizeof(struct igb_buffer) * tx_ring->count; - memset(tx_ring->buffer_info, 0, size); - - /* Zero out the descriptor ring */ - - memset(tx_ring->desc, 0, tx_ring->size); - - tx_ring->next_to_use = 0; - tx_ring->next_to_clean = 0; - - writel(0, adapter->hw.hw_addr + tx_ring->head); - writel(0, adapter->hw.hw_addr + tx_ring->tail); -} - -/** - * igb_clean_all_tx_rings - Free Tx Buffers for all queues - * @adapter: board private structure - **/ -static void igb_clean_all_tx_rings(struct igb_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_tx_queues; i++) - igb_clean_tx_ring(adapter, &adapter->tx_ring[i]); -} - -/** - * igb_free_rx_resources - Free Rx Resources - * @adapter: board private structure - * @rx_ring: ring to clean the resources from - * - * Free all receive software resources - **/ -static void igb_free_rx_resources(struct igb_adapter *adapter, - struct igb_ring *rx_ring) -{ - struct pci_dev *pdev = adapter->pdev; - - igb_clean_rx_ring(adapter, rx_ring); - - vfree(rx_ring->buffer_info); - rx_ring->buffer_info = NULL; - - pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma); - - rx_ring->desc = NULL; -} - -/** - * igb_free_all_rx_resources - Free Rx Resources for All Queues - * @adapter: board private structure - * - * Free all receive software resources - **/ -static void igb_free_all_rx_resources(struct igb_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_rx_queues; i++) - igb_free_rx_resources(adapter, &adapter->rx_ring[i]); -} - -/** - * igb_clean_rx_ring - Free Rx Buffers per Queue - * @adapter: board private structure - * @rx_ring: ring to free buffers from - **/ -static void igb_clean_rx_ring(struct igb_adapter *adapter, - struct igb_ring *rx_ring) -{ - struct igb_buffer *buffer_info; - struct pci_dev *pdev = adapter->pdev; - unsigned long size; - unsigned int i; - - if (!rx_ring->buffer_info) - return; - /* Free all the Rx ring sk_buffs */ - for (i = 0; i < rx_ring->count; i++) { - buffer_info = &rx_ring->buffer_info[i]; - if (buffer_info->dma) { - if (adapter->rx_ps_hdr_size) - pci_unmap_single(pdev, buffer_info->dma, - adapter->rx_ps_hdr_size, - PCI_DMA_FROMDEVICE); - else - pci_unmap_single(pdev, buffer_info->dma, - adapter->rx_buffer_len, - PCI_DMA_FROMDEVICE); - buffer_info->dma = 0; - } - - if (buffer_info->skb) { - dev_kfree_skb(buffer_info->skb); - buffer_info->skb = NULL; - } - if (buffer_info->page) { - pci_unmap_page(pdev, buffer_info->page_dma, - PAGE_SIZE, PCI_DMA_FROMDEVICE); - put_page(buffer_info->page); - buffer_info->page = NULL; - buffer_info->page_dma = 0; - } - } - - /* there also may be some cached data from a chained receive */ - if (rx_ring->pending_skb) { - dev_kfree_skb(rx_ring->pending_skb); - rx_ring->pending_skb = NULL; - } - - size = sizeof(struct igb_buffer) * rx_ring->count; - memset(rx_ring->buffer_info, 0, size); - - /* Zero out the descriptor ring */ - memset(rx_ring->desc, 0, rx_ring->size); - - rx_ring->next_to_clean = 0; - rx_ring->next_to_use = 0; - - writel(0, adapter->hw.hw_addr + rx_ring->head); - writel(0, adapter->hw.hw_addr + rx_ring->tail); -} - -/** - * igb_clean_all_rx_rings - Free Rx Buffers for all queues - * @adapter: board private structure - **/ -static void igb_clean_all_rx_rings(struct igb_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_rx_queues; i++) - igb_clean_rx_ring(adapter, &adapter->rx_ring[i]); -} - -/** - * igb_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 igb_set_mac(struct net_device *netdev, void *p) -{ - struct igb_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); - memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len); - - adapter->hw.mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 0); - - return 0; -} - -/** - * igb_set_multi - Multicast and Promiscuous mode set - * @netdev: network interface device structure - * - * The set_multi entry point is called whenever the multicast address - * list or the network interface flags are updated. This routine is - * responsible for configuring the hardware for proper multicast, - * promiscuous mode, and all-multi behavior. - **/ -static void igb_set_multi(struct net_device *netdev) -{ - struct igb_adapter *adapter = netdev_priv(netdev); - struct e1000_hw *hw = &adapter->hw; - struct e1000_mac_info *mac = &hw->mac; - struct dev_mc_list *mc_ptr; - u8 *mta_list; - u32 rctl; - int i; - - /* Check for Promiscuous and All Multicast modes */ - - rctl = rd32(E1000_RCTL); - - if (netdev->flags & IFF_PROMISC) - rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE); - else if (netdev->flags & IFF_ALLMULTI) { - rctl |= E1000_RCTL_MPE; - rctl &= ~E1000_RCTL_UPE; - } else - rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE); - - wr32(E1000_RCTL, rctl); - - if (!netdev->mc_count) { - /* nothing to program, so clear mc list */ - igb_update_mc_addr_list(hw, NULL, 0, 1, - mac->rar_entry_count); - return; - } - - mta_list = kzalloc(netdev->mc_count * 6, GFP_ATOMIC); - if (!mta_list) - return; - - /* The shared function expects a packed array of only addresses. */ - mc_ptr = netdev->mc_list; - - for (i = 0; i < netdev->mc_count; i++) { - if (!mc_ptr) - break; - memcpy(mta_list + (i*ETH_ALEN), mc_ptr->dmi_addr, ETH_ALEN); - mc_ptr = mc_ptr->next; - } - igb_update_mc_addr_list(hw, mta_list, i, 1, mac->rar_entry_count); - kfree(mta_list); -} - -/* Need to wait a few seconds after link up to get diagnostic information from - * the phy */ -static void igb_update_phy_info(unsigned long data) -{ - struct igb_adapter *adapter = (struct igb_adapter *) data; - if (adapter->hw.phy.ops.get_phy_info) - adapter->hw.phy.ops.get_phy_info(&adapter->hw); -} - -/** - * igb_watchdog - Timer Call-back - * @data: pointer to adapter cast into an unsigned long - **/ -static void igb_watchdog(unsigned long data) -{ - struct igb_adapter *adapter = (struct igb_adapter *)data; - /* Do the rest outside of interrupt context */ - schedule_work(&adapter->watchdog_task); -} - -static void igb_watchdog_task(struct work_struct *work) -{ - struct igb_adapter *adapter = container_of(work, - struct igb_adapter, watchdog_task); - struct e1000_hw *hw = &adapter->hw; - - struct net_device *netdev = adapter->netdev; - struct igb_ring *tx_ring = adapter->tx_ring; - struct e1000_mac_info *mac = &adapter->hw.mac; - u32 link; - s32 ret_val; - - if ((netif_carrier_ok(netdev)) && - (rd32(E1000_STATUS) & E1000_STATUS_LU)) - goto link_up; - - ret_val = hw->mac.ops.check_for_link(&adapter->hw); - if ((ret_val == E1000_ERR_PHY) && - (hw->phy.type == e1000_phy_igp_3) && - (rd32(E1000_CTRL) & - E1000_PHY_CTRL_GBE_DISABLE)) - dev_info(&adapter->pdev->dev, - "Gigabit has been disabled, downgrading speed\n"); - - if ((hw->phy.media_type == e1000_media_type_internal_serdes) && - !(rd32(E1000_TXCW) & E1000_TXCW_ANE)) - link = mac->serdes_has_link; - else - link = rd32(E1000_STATUS) & - E1000_STATUS_LU; - - if (link) { - if (!netif_carrier_ok(netdev)) { - u32 ctrl; - hw->mac.ops.get_speed_and_duplex(&adapter->hw, - &adapter->link_speed, - &adapter->link_duplex); - - ctrl = rd32(E1000_CTRL); - dev_info(&adapter->pdev->dev, - "NIC Link is Up %d Mbps %s, " - "Flow Control: %s\n", - adapter->link_speed, - adapter->link_duplex == FULL_DUPLEX ? - "Full Duplex" : "Half Duplex", - ((ctrl & E1000_CTRL_TFCE) && (ctrl & - E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl & - E1000_CTRL_RFCE) ? "RX" : ((ctrl & - E1000_CTRL_TFCE) ? "TX" : "None"))); - - /* tweak tx_queue_len according to speed/duplex and - * adjust the timeout factor */ - netdev->tx_queue_len = adapter->tx_queue_len; - adapter->tx_timeout_factor = 1; - switch (adapter->link_speed) { - case SPEED_10: - netdev->tx_queue_len = 10; - adapter->tx_timeout_factor = 14; - break; - case SPEED_100: - netdev->tx_queue_len = 100; - /* maybe add some timeout factor ? */ - break; - } - - netif_carrier_on(netdev); - netif_wake_queue(netdev); - - if (!test_bit(__IGB_DOWN, &adapter->state)) - mod_timer(&adapter->phy_info_timer, - round_jiffies(jiffies + 2 * HZ)); - } - } else { - if (netif_carrier_ok(netdev)) { - adapter->link_speed = 0; - adapter->link_duplex = 0; - dev_info(&adapter->pdev->dev, "NIC Link is Down\n"); - netif_carrier_off(netdev); - netif_stop_queue(netdev); - if (!test_bit(__IGB_DOWN, &adapter->state)) - mod_timer(&adapter->phy_info_timer, - round_jiffies(jiffies + 2 * HZ)); - } - } - -link_up: - igb_update_stats(adapter); - - mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old; - adapter->tpt_old = adapter->stats.tpt; - mac->collision_delta = adapter->stats.colc - adapter->colc_old; - adapter->colc_old = adapter->stats.colc; - - adapter->gorc = adapter->stats.gorc - adapter->gorc_old; - adapter->gorc_old = adapter->stats.gorc; - adapter->gotc = adapter->stats.gotc - adapter->gotc_old; - adapter->gotc_old = adapter->stats.gotc; - - igb_update_adaptive(&adapter->hw); - - if (!netif_carrier_ok(netdev)) { - if (IGB_DESC_UNUSED(tx_ring) + 1 < tx_ring->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). */ - adapter->tx_timeout_count++; - schedule_work(&adapter->reset_task); - } - } - - /* Cause software interrupt to ensure rx ring is cleaned */ - wr32(E1000_ICS, E1000_ICS_RXDMT0); - - /* Force detection of hung controller every watchdog period */ - tx_ring->detect_tx_hung = true; - - /* Reset the timer */ - if (!test_bit(__IGB_DOWN, &adapter->state)) - mod_timer(&adapter->watchdog_timer, - round_jiffies(jiffies + 2 * HZ)); -} - -enum latency_range { - lowest_latency = 0, - low_latency = 1, - bulk_latency = 2, - latency_invalid = 255 -}; - - -static void igb_lower_rx_eitr(struct igb_adapter *adapter, - struct igb_ring *rx_ring) -{ - struct e1000_hw *hw = &adapter->hw; - int new_val; - - new_val = rx_ring->itr_val / 2; - if (new_val < IGB_MIN_DYN_ITR) - new_val = IGB_MIN_DYN_ITR; - - if (new_val != rx_ring->itr_val) { - rx_ring->itr_val = new_val; - wr32(rx_ring->itr_register, - 1000000000 / (new_val * 256)); - } -} - -static void igb_raise_rx_eitr(struct igb_adapter *adapter, - struct igb_ring *rx_ring) -{ - struct e1000_hw *hw = &adapter->hw; - int new_val; - - new_val = rx_ring->itr_val * 2; - if (new_val > IGB_MAX_DYN_ITR) - new_val = IGB_MAX_DYN_ITR; - - if (new_val != rx_ring->itr_val) { - rx_ring->itr_val = new_val; - wr32(rx_ring->itr_register, - 1000000000 / (new_val * 256)); - } -} - -/** - * igb_update_itr - update the dynamic ITR value based on statistics - * Stores a new ITR value based on packets and byte - * counts during the last interrupt. The advantage of per interrupt - * computation is faster updates and more accurate ITR for the current - * traffic pattern. Constants in this function were computed - * based on theoretical maximum wire speed and thresholds were set based - * on testing data as well as attempting to minimize response time - * while increasing bulk throughput. - * this functionality is controlled by the InterruptThrottleRate module - * parameter (see igb_param.c) - * NOTE: These calculations are only valid when operating in a single- - * queue environment. - * @adapter: pointer to adapter - * @itr_setting: current adapter->itr - * @packets: the number of packets during this measurement interval - * @bytes: the number of bytes during this measurement interval - **/ -static unsigned int igb_update_itr(struct igb_adapter *adapter, u16 itr_setting, - int packets, int bytes) -{ - unsigned int retval = itr_setting; - - if (packets == 0) - goto update_itr_done; - - switch (itr_setting) { - case lowest_latency: - /* handle TSO and jumbo frames */ - if (bytes/packets > 8000) - retval = bulk_latency; - else if ((packets < 5) && (bytes > 512)) - retval = low_latency; - break; - case low_latency: /* 50 usec aka 20000 ints/s */ - if (bytes > 10000) { - /* this if handles the TSO accounting */ - if (bytes/packets > 8000) { - retval = bulk_latency; - } else if ((packets < 10) || ((bytes/packets) > 1200)) { - retval = bulk_latency; - } else if ((packets > 35)) { - retval = lowest_latency; - } - } else if (bytes/packets > 2000) { - retval = bulk_latency; - } else if (packets <= 2 && bytes < 512) { - retval = lowest_latency; - } - break; - case bulk_latency: /* 250 usec aka 4000 ints/s */ - if (bytes > 25000) { - if (packets > 35) - retval = low_latency; - } else if (bytes < 6000) { - retval = low_latency; - } - break; - } - -update_itr_done: - return retval; -} - -static void igb_set_itr(struct igb_adapter *adapter, u16 itr_register, - int rx_only) -{ - u16 current_itr; - u32 new_itr = adapter->itr; - - /* for non-gigabit speeds, just fix the interrupt rate at 4000 */ - if (adapter->link_speed != SPEED_1000) { - current_itr = 0; - new_itr = 4000; - goto set_itr_now; - } - - adapter->rx_itr = igb_update_itr(adapter, - adapter->rx_itr, - adapter->rx_ring->total_packets, - adapter->rx_ring->total_bytes); - /* conservative mode (itr 3) eliminates the lowest_latency setting */ - if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency) - adapter->rx_itr = low_latency; - - if (!rx_only) { - adapter->tx_itr = igb_update_itr(adapter, - adapter->tx_itr, - adapter->tx_ring->total_packets, - adapter->tx_ring->total_bytes); - /* conservative mode (itr 3) eliminates the - * lowest_latency setting */ - if (adapter->itr_setting == 3 && - adapter->tx_itr == lowest_latency) - adapter->tx_itr = low_latency; - - current_itr = max(adapter->rx_itr, adapter->tx_itr); - } else { - current_itr = adapter->rx_itr; - } - - switch (current_itr) { - /* counts and packets in update_itr are dependent on these numbers */ - case lowest_latency: - new_itr = 70000; - break; - case low_latency: - new_itr = 20000; /* aka hwitr = ~200 */ - break; - case bulk_latency: - new_itr = 4000; - break; - default: - break; - } - -set_itr_now: - if (new_itr != adapter->itr) { - /* this attempts to bias the interrupt rate towards Bulk - * by adding intermediate steps when interrupt rate is - * increasing */ - new_itr = new_itr > adapter->itr ? - min(adapter->itr + (new_itr >> 2), new_itr) : - new_itr; - /* Don't write the value here; it resets the adapter's - * internal timer, and causes us to delay far longer than - * we should between interrupts. Instead, we write the ITR - * value at the beginning of the next interrupt so the timing - * ends up being correct. - */ - adapter->itr = new_itr; - adapter->set_itr = 1; - } - - return; -} - - -#define IGB_TX_FLAGS_CSUM 0x00000001 -#define IGB_TX_FLAGS_VLAN 0x00000002 -#define IGB_TX_FLAGS_TSO 0x00000004 -#define IGB_TX_FLAGS_IPV4 0x00000008 -#define IGB_TX_FLAGS_VLAN_MASK 0xffff0000 -#define IGB_TX_FLAGS_VLAN_SHIFT 16 - -static inline int igb_tso_adv(struct igb_adapter *adapter, - struct igb_ring *tx_ring, - struct sk_buff *skb, u32 tx_flags, u8 *hdr_len) -{ - struct e1000_adv_tx_context_desc *context_desc; - unsigned int i; - int err; - struct igb_buffer *buffer_info; - u32 info = 0, tu_cmd = 0; - u32 mss_l4len_idx, l4len; - *hdr_len = 0; - - if (skb_header_cloned(skb)) { - err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); - if (err) - return err; - } - - l4len = tcp_hdrlen(skb); - *hdr_len += l4len; - - if (skb->protocol == htons(ETH_P_IP)) { - struct iphdr *iph = ip_hdr(skb); - iph->tot_len = 0; - iph->check = 0; - tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, - iph->daddr, 0, - IPPROTO_TCP, - 0); - } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) { - ipv6_hdr(skb)->payload_len = 0; - tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, - &ipv6_hdr(skb)->daddr, - 0, IPPROTO_TCP, 0); - } - - i = tx_ring->next_to_use; - - buffer_info = &tx_ring->buffer_info[i]; - context_desc = E1000_TX_CTXTDESC_ADV(*tx_ring, i); - /* VLAN MACLEN IPLEN */ - if (tx_flags & IGB_TX_FLAGS_VLAN) - info |= (tx_flags & IGB_TX_FLAGS_VLAN_MASK); - info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); - *hdr_len += skb_network_offset(skb); - info |= skb_network_header_len(skb); - *hdr_len += skb_network_header_len(skb); - context_desc->vlan_macip_lens = cpu_to_le32(info); - - /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ - tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); - - if (skb->protocol == htons(ETH_P_IP)) - tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; - tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; - - context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); - - /* MSS L4LEN IDX */ - mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT); - mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT); - - /* Context index must be unique per ring. Luckily, so is the interrupt - * mask value. */ - mss_l4len_idx |= tx_ring->eims_value >> 4; - - context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); - context_desc->seqnum_seed = 0; - - buffer_info->time_stamp = jiffies; - buffer_info->dma = 0; - i++; - if (i == tx_ring->count) - i = 0; - - tx_ring->next_to_use = i; - - return true; -} - -static inline bool igb_tx_csum_adv(struct igb_adapter *adapter, - struct igb_ring *tx_ring, - struct sk_buff *skb, u32 tx_flags) -{ - struct e1000_adv_tx_context_desc *context_desc; - unsigned int i; - struct igb_buffer *buffer_info; - u32 info = 0, tu_cmd = 0; - - if ((skb->ip_summed == CHECKSUM_PARTIAL) || - (tx_flags & IGB_TX_FLAGS_VLAN)) { - i = tx_ring->next_to_use; - buffer_info = &tx_ring->buffer_info[i]; - context_desc = E1000_TX_CTXTDESC_ADV(*tx_ring, i); - - if (tx_flags & IGB_TX_FLAGS_VLAN) - info |= (tx_flags & IGB_TX_FLAGS_VLAN_MASK); - info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); - if (skb->ip_summed == CHECKSUM_PARTIAL) - info |= skb_network_header_len(skb); - - context_desc->vlan_macip_lens = cpu_to_le32(info); - - tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); - - if (skb->ip_summed == CHECKSUM_PARTIAL) { - switch (skb->protocol) { - case __constant_htons(ETH_P_IP): - tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; - if (ip_hdr(skb)->protocol == IPPROTO_TCP) - tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; - break; - case __constant_htons(ETH_P_IPV6): - /* XXX what about other V6 headers?? */ - if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) - tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; - break; - default: - if (unlikely(net_ratelimit())) - dev_warn(&adapter->pdev->dev, - "partial checksum but proto=%x!\n", - skb->protocol); - break; - } - } - - context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); - context_desc->seqnum_seed = 0; - context_desc->mss_l4len_idx = - cpu_to_le32(tx_ring->eims_value >> 4); - - buffer_info->time_stamp = jiffies; - buffer_info->dma = 0; - - i++; - if (i == tx_ring->count) - i = 0; - tx_ring->next_to_use = i; - - return true; - } - - - return false; -} - -#define IGB_MAX_TXD_PWR 16 -#define IGB_MAX_DATA_PER_TXD (1<<IGB_MAX_TXD_PWR) - -static inline int igb_tx_map_adv(struct igb_adapter *adapter, - struct igb_ring *tx_ring, - struct sk_buff *skb) -{ - struct igb_buffer *buffer_info; - unsigned int len = skb_headlen(skb); - unsigned int count = 0, i; - unsigned int f; - - i = tx_ring->next_to_use; - - buffer_info = &tx_ring->buffer_info[i]; - BUG_ON(len >= IGB_MAX_DATA_PER_TXD); - buffer_info->length = len; - /* set time_stamp *before* dma to help avoid a possible race */ - buffer_info->time_stamp = jiffies; - buffer_info->dma = pci_map_single(adapter->pdev, skb->data, len, - PCI_DMA_TODEVICE); - count++; - i++; - if (i == tx_ring->count) - i = 0; - - for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) { - struct skb_frag_struct *frag; - - frag = &skb_shinfo(skb)->frags[f]; - len = frag->size; - - buffer_info = &tx_ring->buffer_info[i]; - BUG_ON(len >= IGB_MAX_DATA_PER_TXD); - buffer_info->length = len; - buffer_info->time_stamp = jiffies; - buffer_info->dma = pci_map_page(adapter->pdev, - frag->page, - frag->page_offset, - len, - PCI_DMA_TODEVICE); - - count++; - i++; - if (i == tx_ring->count) - i = 0; - } - - i = (i == 0) ? tx_ring->count - 1 : i - 1; - tx_ring->buffer_info[i].skb = skb; - - return count; -} - -static inline void igb_tx_queue_adv(struct igb_adapter *adapter, - struct igb_ring *tx_ring, - int tx_flags, int count, u32 paylen, - u8 hdr_len) -{ - union e1000_adv_tx_desc *tx_desc = NULL; - struct igb_buffer *buffer_info; - u32 olinfo_status = 0, cmd_type_len; - unsigned int i; - - cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS | - E1000_ADVTXD_DCMD_DEXT); - - if (tx_flags & IGB_TX_FLAGS_VLAN) - cmd_type_len |= E1000_ADVTXD_DCMD_VLE; - - if (tx_flags & IGB_TX_FLAGS_TSO) { - cmd_type_len |= E1000_ADVTXD_DCMD_TSE; - - /* insert tcp checksum */ - olinfo_status |= E1000_TXD_POPTS_TXSM << 8; - - /* insert ip checksum */ - if (tx_flags & IGB_TX_FLAGS_IPV4) - olinfo_status |= E1000_TXD_POPTS_IXSM << 8; - - } else if (tx_flags & IGB_TX_FLAGS_CSUM) { - olinfo_status |= E1000_TXD_POPTS_TXSM << 8; - } - - if (tx_flags & (IGB_TX_FLAGS_CSUM | IGB_TX_FLAGS_TSO | - IGB_TX_FLAGS_VLAN)) - olinfo_status |= tx_ring->eims_value >> 4; - - olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT); - - i = tx_ring->next_to_use; - while (count--) { - buffer_info = &tx_ring->buffer_info[i]; - tx_desc = E1000_TX_DESC_ADV(*tx_ring, i); - tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); - tx_desc->read.cmd_type_len = - cpu_to_le32(cmd_type_len | buffer_info->length); - tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); - i++; - if (i == tx_ring->count) - i = 0; - } - - tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd); - /* Force memory writes to complete before letting h/w - * know there are new descriptors to fetch. (Only - * applicable for weak-ordered memory model archs, - * such as IA-64). */ - wmb(); - - tx_ring->next_to_use = i; - writel(i, adapter->hw.hw_addr + tx_ring->tail); - /* we need this if more than one processor can write to our tail - * at a time, it syncronizes IO on IA64/Altix systems */ - mmiowb(); -} - -static int __igb_maybe_stop_tx(struct net_device *netdev, - struct igb_ring *tx_ring, int size) -{ - struct igb_adapter *adapter = netdev_priv(netdev); - - netif_stop_queue(netdev); - /* Herbert's original patch had: - * smp_mb__after_netif_stop_queue(); - * but since that doesn't exist yet, just open code it. */ - smp_mb(); - - /* We need to check again in a case another CPU has just - * made room available. */ - if (IGB_DESC_UNUSED(tx_ring) < size) - return -EBUSY; - - /* A reprieve! */ - netif_start_queue(netdev); - ++adapter->restart_queue; - return 0; -} - -static int igb_maybe_stop_tx(struct net_device *netdev, - struct igb_ring *tx_ring, int size) -{ - if (IGB_DESC_UNUSED(tx_ring) >= size) - return 0; - return __igb_maybe_stop_tx(netdev, tx_ring, size); -} - -#define TXD_USE_COUNT(S) (((S) >> (IGB_MAX_TXD_PWR)) + 1) - -static int igb_xmit_frame_ring_adv(struct sk_buff *skb, - struct net_device *netdev, - struct igb_ring *tx_ring) -{ - struct igb_adapter *adapter = netdev_priv(netdev); - unsigned int tx_flags = 0; - unsigned int len; - unsigned long irq_flags; - u8 hdr_len = 0; - int tso = 0; - - len = skb_headlen(skb); - - if (test_bit(__IGB_DOWN, &adapter->state)) { - dev_kfree_skb_any(skb); - return NETDEV_TX_OK; - } - - if (skb->len <= 0) { - dev_kfree_skb_any(skb); - return NETDEV_TX_OK; - } - - if (!spin_trylock_irqsave(&tx_ring->tx_lock, irq_flags)) - /* Collision - tell upper layer to requeue */ - return NETDEV_TX_LOCKED; - - /* need: 1 descriptor per page, - * + 2 desc gap to keep tail from touching head, - * + 1 desc for skb->data, - * + 1 desc for context descriptor, - * otherwise try next time */ - if (igb_maybe_stop_tx(netdev, tx_ring, skb_shinfo(skb)->nr_frags + 4)) { - /* this is a hard error */ - spin_unlock_irqrestore(&tx_ring->tx_lock, irq_flags); - return NETDEV_TX_BUSY; - } - - if (adapter->vlgrp && vlan_tx_tag_present(skb)) { - tx_flags |= IGB_TX_FLAGS_VLAN; - tx_flags |= (vlan_tx_tag_get(skb) << IGB_TX_FLAGS_VLAN_SHIFT); - } - - tso = skb_is_gso(skb) ? igb_tso_adv(adapter, tx_ring, skb, tx_flags, - &hdr_len) : 0; - - if (tso < 0) { - dev_kfree_skb_any(skb); - spin_unlock_irqrestore(&tx_ring->tx_lock, irq_flags); - return NETDEV_TX_OK; - } - - if (tso) - tx_flags |= IGB_TX_FLAGS_TSO; - else if (igb_tx_csum_adv(adapter, tx_ring, skb, tx_flags)) - if (skb->ip_summed == CHECKSUM_PARTIAL) - tx_flags |= IGB_TX_FLAGS_CSUM; - - if (skb->protocol == htons(ETH_P_IP)) - tx_flags |= IGB_TX_FLAGS_IPV4; - - igb_tx_queue_adv(adapter, tx_ring, tx_flags, - igb_tx_map_adv(adapter, tx_ring, skb), - skb->len, hdr_len); - - netdev->trans_start = jiffies; - - /* Make sure there is space in the ring for the next send. */ - igb_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 4); - - spin_unlock_irqrestore(&tx_ring->tx_lock, irq_flags); - return NETDEV_TX_OK; -} - -static int igb_xmit_frame_adv(struct sk_buff *skb, struct net_device *netdev) -{ - struct igb_adapter *adapter = netdev_priv(netdev); - struct igb_ring *tx_ring = &adapter->tx_ring[0]; - - /* This goes back to the question of how to logically map a tx queue - * to a flow. Right now, performance is impacted slightly negatively - * if using multiple tx queues. If the stack breaks away from a - * single qdisc implementation, we can look at this again. */ - return (igb_xmit_frame_ring_adv(skb, netdev, tx_ring)); -} - -/** - * igb_tx_timeout - Respond to a Tx Hang - * @netdev: network interface device structure - **/ -static void igb_tx_timeout(struct net_device *netdev) -{ - struct igb_adapter *adapter = netdev_priv(netdev); - struct e1000_hw *hw = &adapter->hw; - - /* Do the reset outside of interrupt context */ - adapter->tx_timeout_count++; - schedule_work(&adapter->reset_task); - wr32(E1000_EICS, adapter->eims_enable_mask & - ~(E1000_EIMS_TCP_TIMER | E1000_EIMS_OTHER)); -} - -static void igb_reset_task(struct work_struct *work) -{ - struct igb_adapter *adapter; - adapter = container_of(work, struct igb_adapter, reset_task); - - igb_reinit_locked(adapter); -} - -/** - * igb_get_stats - Get System Network Statistics - * @netdev: network interface device structure - * - * Returns the address of the device statistics structure. - * The statistics are actually updated from the timer callback. - **/ -static struct net_device_stats * -igb_get_stats(struct net_device *netdev) -{ - struct igb_adapter *adapter = netdev_priv(netdev); - - /* only return the current stats */ - return &adapter->net_stats; -} - -/** - * igb_change_mtu - Change the Maximum Transfer Unit - * @netdev: network interface device structure - * @new_mtu: new value for maximum frame size - * - * Returns 0 on success, negative on failure - **/ -static int igb_change_mtu(struct net_device *netdev, int new_mtu) -{ - struct igb_adapter *adapter = netdev_priv(netdev); - int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; - - if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) || - (max_frame > MAX_JUMBO_FRAME_SIZE)) { - dev_err(&adapter->pdev->dev, "Invalid MTU setting\n"); - return -EINVAL; - } - -#define MAX_STD_JUMBO_FRAME_SIZE 9234 - if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) { - dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n"); - return -EINVAL; - } - - while (test_and_set_bit(__IGB_RESETTING, &adapter->state)) - msleep(1); - /* igb_down has a dependency on max_frame_size */ - adapter->max_frame_size = max_frame; - if (netif_running(netdev)) - igb_down(adapter); - - /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN - * means we reserve 2 more, this pushes us to allocate from the next - * larger slab size. - * i.e. RXBUFFER_2048 --> size-4096 slab - */ - - if (max_frame <= IGB_RXBUFFER_256) - adapter->rx_buffer_len = IGB_RXBUFFER_256; - else if (max_frame <= IGB_RXBUFFER_512) - adapter->rx_buffer_len = IGB_RXBUFFER_512; - else if (max_frame <= IGB_RXBUFFER_1024) - adapter->rx_buffer_len = IGB_RXBUFFER_1024; - else if (max_frame <= IGB_RXBUFFER_2048) - adapter->rx_buffer_len = IGB_RXBUFFER_2048; - else - adapter->rx_buffer_len = IGB_RXBUFFER_4096; - /* adjust allocation if LPE protects us, and we aren't using SBP */ - if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) || - (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)) - adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; - - dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n", - netdev->mtu, new_mtu); - netdev->mtu = new_mtu; - - if (netif_running(netdev)) - igb_up(adapter); - else - igb_reset(adapter); - - clear_bit(__IGB_RESETTING, &adapter->state); - - return 0; -} - -/** - * igb_update_stats - Update the board statistics counters - * @adapter: board private structure - **/ - -void igb_update_stats(struct igb_adapter *adapter) -{ - struct e1000_hw *hw = &adapter->hw; - struct pci_dev *pdev = adapter->pdev; - u16 phy_tmp; - -#define PHY_IDLE_ERROR_COUNT_MASK 0x00FF - - /* - * Prevent stats update while adapter is being reset, or if the pci - * connection is down. - */ - if (adapter->link_speed == 0) - return; - if (pci_channel_offline(pdev)) - return; - - adapter->stats.crcerrs += rd32(E1000_CRCERRS); - adapter->stats.gprc += rd32(E1000_GPRC); - adapter->stats.gorc += rd32(E1000_GORCL); - rd32(E1000_GORCH); /* clear GORCL */ - adapter->stats.bprc += rd32(E1000_BPRC); - adapter->stats.mprc += rd32(E1000_MPRC); - adapter->stats.roc += rd32(E1000_ROC); - - adapter->stats.prc64 += rd32(E1000_PRC64); - adapter->stats.prc127 += rd32(E1000_PRC127); - adapter->stats.prc255 += rd32(E1000_PRC255); - adapter->stats.prc511 += rd32(E1000_PRC511); - adapter->stats.prc1023 += rd32(E1000_PRC1023); - adapter->stats.prc1522 += rd32(E1000_PRC1522); - adapter->stats.symerrs += rd32(E1000_SYMERRS); - adapter->stats.sec += rd32(E1000_SEC); - - adapter->stats.mpc += rd32(E1000_MPC); - adapter->stats.scc += rd32(E1000_SCC); - adapter->stats.ecol += rd32(E1000_ECOL); - adapter->stats.mcc += rd32(E1000_MCC); - adapter->stats.latecol += rd32(E1000_LATECOL); - adapter->stats.dc += rd32(E1000_DC); - adapter->stats.rlec += rd32(E1000_RLEC); - adapter->stats.xonrxc += rd32(E1000_XONRXC); - adapter->stats.xontxc += rd32(E1000_XONTXC); - adapter->stats.xoffrxc += rd32(E1000_XOFFRXC); - adapter->stats.xofftxc += rd32(E1000_XOFFTXC); - adapter->stats.fcruc += rd32(E1000_FCRUC); - adapter->stats.gptc += rd32(E1000_GPTC); - adapter->stats.gotc += rd32(E1000_GOTCL); - rd32(E1000_GOTCH); /* clear GOTCL */ - adapter->stats.rnbc += rd32(E1000_RNBC); - adapter->stats.ruc += rd32(E1000_RUC); - adapter->stats.rfc += rd32(E1000_RFC); - adapter->stats.rjc += rd32(E1000_RJC); - adapter->stats.tor += rd32(E1000_TORH); - adapter->stats.tot += rd32(E1000_TOTH); - adapter->stats.tpr += rd32(E1000_TPR); - - adapter->stats.ptc64 += rd32(E1000_PTC64); - adapter->stats.ptc127 += rd32(E1000_PTC127); - adapter->stats.ptc255 += rd32(E1000_PTC255); - adapter->stats.ptc511 += rd32(E1000_PTC511); - adapter->stats.ptc1023 += rd32(E1000_PTC1023); - adapter->stats.ptc1522 += rd32(E1000_PTC1522); - - adapter->stats.mptc += rd32(E1000_MPTC); - adapter->stats.bptc += rd32(E1000_BPTC); - - /* used for adaptive IFS */ - - hw->mac.tx_packet_delta = rd32(E1000_TPT); - adapter->stats.tpt += hw->mac.tx_packet_delta; - hw->mac.collision_delta = rd32(E1000_COLC); - adapter->stats.colc += hw->mac.collision_delta; - - adapter->stats.algnerrc += rd32(E1000_ALGNERRC); - adapter->stats.rxerrc += rd32(E1000_RXERRC); - adapter->stats.tncrs += rd32(E1000_TNCRS); - adapter->stats.tsctc += rd32(E1000_TSCTC); - adapter->stats.tsctfc += rd32(E1000_TSCTFC); - - adapter->stats.iac += rd32(E1000_IAC); - adapter->stats.icrxoc += rd32(E1000_ICRXOC); - adapter->stats.icrxptc += rd32(E1000_ICRXPTC); - adapter->stats.icrxatc += rd32(E1000_ICRXATC); - adapter->stats.ictxptc += rd32(E1000_ICTXPTC); - adapter->stats.ictxatc += rd32(E1000_ICTXATC); - adapter->stats.ictxqec += rd32(E1000_ICTXQEC); - adapter->stats.ictxqmtc += rd32(E1000_ICTXQMTC); - adapter->stats.icrxdmtc += rd32(E1000_ICRXDMTC); - - /* Fill out the OS statistics structure */ - adapter->net_stats.multicast = adapter->stats.mprc; - adapter->net_stats.collisions = adapter->stats.colc; - - /* Rx Errors */ - - /* RLEC on some newer hardware can be incorrect so build - * our own version based on RUC and ROC */ - adapter->net_stats.rx_errors = adapter->stats.rxerrc + - adapter->stats.crcerrs + adapter->stats.algnerrc + - adapter->stats.ruc + adapter->stats.roc + - adapter->stats.cexterr; - adapter->net_stats.rx_length_errors = adapter->stats.ruc + - adapter->stats.roc; - adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs; - adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc; - adapter->net_stats.rx_missed_errors = adapter->stats.mpc; - - /* Tx Errors */ - adapter->net_stats.tx_errors = adapter->stats.ecol + - adapter->stats.latecol; - adapter->net_stats.tx_aborted_errors = adapter->stats.ecol; - adapter->net_stats.tx_window_errors = adapter->stats.latecol; - adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs; - - /* Tx Dropped needs to be maintained elsewhere */ - - /* Phy Stats */ - if (hw->phy.media_type == e1000_media_type_copper) { - if ((adapter->link_speed == SPEED_1000) && - (!hw->phy.ops.read_phy_reg(hw, PHY_1000T_STATUS, - &phy_tmp))) { - phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK; - adapter->phy_stats.idle_errors += phy_tmp; - } - } - - /* Management Stats */ - adapter->stats.mgptc += rd32(E1000_MGTPTC); - adapter->stats.mgprc += rd32(E1000_MGTPRC); - adapter->stats.mgpdc += rd32(E1000_MGTPDC); -} - - -static irqreturn_t igb_msix_other(int irq, void *data) -{ - struct net_device *netdev = data; - struct igb_adapter *adapter = netdev_priv(netdev); - struct e1000_hw *hw = &adapter->hw; - u32 eicr; - /* disable interrupts from the "other" bit, avoid re-entry */ - wr32(E1000_EIMC, E1000_EIMS_OTHER); - - eicr = rd32(E1000_EICR); - - if (eicr & E1000_EIMS_OTHER) { - u32 icr = rd32(E1000_ICR); - /* reading ICR causes bit 31 of EICR to be cleared */ - if (!(icr & E1000_ICR_LSC)) - goto no_link_interrupt; - hw->mac.get_link_status = 1; - /* guard against interrupt when we're going down */ - if (!test_bit(__IGB_DOWN, &adapter->state)) - mod_timer(&adapter->watchdog_timer, jiffies + 1); - } - -no_link_interrupt: - wr32(E1000_IMS, E1000_IMS_LSC); - wr32(E1000_EIMS, E1000_EIMS_OTHER); - - return IRQ_HANDLED; -} - -static irqreturn_t igb_msix_tx(int irq, void *data) -{ - struct igb_ring *tx_ring = data; - struct igb_adapter *adapter = tx_ring->adapter; - struct e1000_hw *hw = &adapter->hw; - - if (!tx_ring->itr_val) - wr32(E1000_EIMC, tx_ring->eims_value); - - tx_ring->total_bytes = 0; - tx_ring->total_packets = 0; - if (!igb_clean_tx_irq(adapter, tx_ring)) - /* Ring was not completely cleaned, so fire another interrupt */ - wr32(E1000_EICS, tx_ring->eims_value); - - if (!tx_ring->itr_val) - wr32(E1000_EIMS, tx_ring->eims_value); - return IRQ_HANDLED; -} - -static irqreturn_t igb_msix_rx(int irq, void *data) -{ - struct igb_ring *rx_ring = data; - struct igb_adapter *adapter = rx_ring->adapter; - struct e1000_hw *hw = &adapter->hw; - - if (!rx_ring->itr_val) - wr32(E1000_EIMC, rx_ring->eims_value); - - if (netif_rx_schedule_prep(adapter->netdev, &rx_ring->napi)) { - rx_ring->total_bytes = 0; - rx_ring->total_packets = 0; - rx_ring->no_itr_adjust = 0; - __netif_rx_schedule(adapter->netdev, &rx_ring->napi); - } else { - if (!rx_ring->no_itr_adjust) { - igb_lower_rx_eitr(adapter, rx_ring); - rx_ring->no_itr_adjust = 1; - } - } - - return IRQ_HANDLED; -} - - -/** - * igb_intr_msi - Interrupt Handler - * @irq: interrupt number - * @data: pointer to a network interface device structure - **/ -static irqreturn_t igb_intr_msi(int irq, void *data) -{ - struct net_device *netdev = data; - struct igb_adapter *adapter = netdev_priv(netdev); - struct napi_struct *napi = &adapter->napi; - struct e1000_hw *hw = &adapter->hw; - /* read ICR disables interrupts using IAM */ - u32 icr = rd32(E1000_ICR); - - /* Write the ITR value calculated at the end of the - * previous interrupt. - */ - if (adapter->set_itr) { - wr32(E1000_ITR, - 1000000000 / (adapter->itr * 256)); - adapter->set_itr = 0; - } - - /* read ICR disables interrupts using IAM */ - if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) { - hw->mac.get_link_status = 1; - if (!test_bit(__IGB_DOWN, &adapter->state)) - mod_timer(&adapter->watchdog_timer, jiffies + 1); - } - - if (netif_rx_schedule_prep(netdev, napi)) { - adapter->tx_ring->total_bytes = 0; - adapter->tx_ring->total_packets = 0; - adapter->rx_ring->total_bytes = 0; - adapter->rx_ring->total_packets = 0; - __netif_rx_schedule(netdev, napi); - } - - return IRQ_HANDLED; -} - -/** - * igb_intr - Interrupt Handler - * @irq: interrupt number - * @data: pointer to a network interface device structure - **/ -static irqreturn_t igb_intr(int irq, void *data) -{ - struct net_device *netdev = data; - struct igb_adapter *adapter = netdev_priv(netdev); - struct napi_struct *napi = &adapter->napi; - struct e1000_hw *hw = &adapter->hw; - /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked. No - * need for the IMC write */ - u32 icr = rd32(E1000_ICR); - u32 eicr = 0; - if (!icr) - return IRQ_NONE; /* Not our interrupt */ - - /* Write the ITR value calculated at the end of the - * previous interrupt. - */ - if (adapter->set_itr) { - wr32(E1000_ITR, - 1000000000 / (adapter->itr * 256)); - adapter->set_itr = 0; - } - - /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is - * not set, then the adapter didn't send an interrupt */ - if (!(icr & E1000_ICR_INT_ASSERTED)) - return IRQ_NONE; - - eicr = rd32(E1000_EICR); - - if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) { - hw->mac.get_link_status = 1; - /* guard against interrupt when we're going down */ - if (!test_bit(__IGB_DOWN, &adapter->state)) - mod_timer(&adapter->watchdog_timer, jiffies + 1); - } - - if (netif_rx_schedule_prep(netdev, napi)) { - adapter->tx_ring->total_bytes = 0; - adapter->rx_ring->total_bytes = 0; - adapter->tx_ring->total_packets = 0; - adapter->rx_ring->total_packets = 0; - __netif_rx_schedule(netdev, napi); - } - - return IRQ_HANDLED; -} - -/** - * igb_clean - NAPI Rx polling callback - * @adapter: board private structure - **/ -static int igb_clean(struct napi_struct *napi, int budget) -{ - struct igb_adapter *adapter = container_of(napi, struct igb_adapter, - napi); - struct net_device *netdev = adapter->netdev; - int tx_clean_complete = 1, work_done = 0; - int i; - - /* Must NOT use netdev_priv macro here. */ - adapter = netdev->priv; - - /* Keep link state information with original netdev */ - if (!netif_carrier_ok(netdev)) - goto quit_polling; - - /* igb_clean is called per-cpu. This lock protects tx_ring[i] from - * being cleaned by multiple cpus simultaneously. A failure obtaining - * the lock means tx_ring[i] is currently being cleaned anyway. */ - for (i = 0; i < adapter->num_tx_queues; i++) { - if (spin_trylock(&adapter->tx_ring[i].tx_clean_lock)) { - tx_clean_complete &= igb_clean_tx_irq(adapter, - &adapter->tx_ring[i]); - spin_unlock(&adapter->tx_ring[i].tx_clean_lock); - } - } - - for (i = 0; i < adapter->num_rx_queues; i++) - igb_clean_rx_irq_adv(adapter, &adapter->rx_ring[i], &work_done, - adapter->rx_ring[i].napi.weight); - - /* If no Tx and not enough Rx work done, exit the polling mode */ - if ((tx_clean_complete && (work_done < budget)) || - !netif_running(netdev)) { -quit_polling: - if (adapter->itr_setting & 3) - igb_set_itr(adapter, E1000_ITR, false); - netif_rx_complete(netdev, napi); - if (!test_bit(__IGB_DOWN, &adapter->state)) - igb_irq_enable(adapter); - return 0; - } - - return 1; -} - -static int igb_clean_rx_ring_msix(struct napi_struct *napi, int budget) -{ - struct igb_ring *rx_ring = container_of(napi, struct igb_ring, napi); - struct igb_adapter *adapter = rx_ring->adapter; - struct e1000_hw *hw = &adapter->hw; - struct net_device *netdev = adapter->netdev; - int work_done = 0; - - /* Keep link state information with original netdev */ - if (!netif_carrier_ok(netdev)) - goto quit_polling; - - igb_clean_rx_irq_adv(adapter, rx_ring, &work_done, budget); - - - /* If not enough Rx work done, exit the polling mode */ - if ((work_done == 0) || !netif_running(netdev)) { -quit_polling: - netif_rx_complete(netdev, napi); - - wr32(E1000_EIMS, rx_ring->eims_value); - if ((adapter->itr_setting & 3) && !rx_ring->no_itr_adjust && - (rx_ring->total_packets > IGB_DYN_ITR_PACKET_THRESHOLD)) { - int mean_size = rx_ring->total_bytes / - rx_ring->total_packets; - if (mean_size < IGB_DYN_ITR_LENGTH_LOW) - igb_raise_rx_eitr(adapter, rx_ring); - else if (mean_size > IGB_DYN_ITR_LENGTH_HIGH) - igb_lower_rx_eitr(adapter, rx_ring); - } - return 0; - } - - return 1; -} - -static inline u32 get_head(struct igb_ring *tx_ring) -{ - void *end = (struct e1000_tx_desc *)tx_ring->desc + tx_ring->count; - return le32_to_cpu(*(volatile __le32 *)end); -} - -/** - * igb_clean_tx_irq - Reclaim resources after transmit completes - * @adapter: board private structure - * returns true if ring is completely cleaned - **/ -static bool igb_clean_tx_irq(struct igb_adapter *adapter, - struct igb_ring *tx_ring) -{ - struct net_device *netdev = adapter->netdev; - struct e1000_hw *hw = &adapter->hw; - struct e1000_tx_desc *tx_desc; - struct igb_buffer *buffer_info; - struct sk_buff *skb; - unsigned int i; - u32 head, oldhead; - unsigned int count = 0; - bool cleaned = false; - bool retval = true; - unsigned int total_bytes = 0, total_packets = 0; - - rmb(); - head = get_head(tx_ring); - i = tx_ring->next_to_clean; - while (1) { - while (i != head) { - cleaned = true; - tx_desc = E1000_TX_DESC(*tx_ring, i); - buffer_info = &tx_ring->buffer_info[i]; - skb = buffer_info->skb; - - if (skb) { - unsigned int segs, bytecount; - /* gso_segs is currently only valid for tcp */ - segs = skb_shinfo(skb)->gso_segs ?: 1; - /* multiply data chunks by size of headers */ - bytecount = ((segs - 1) * skb_headlen(skb)) + - skb->len; - total_packets += segs; - total_bytes += bytecount; - } - - igb_unmap_and_free_tx_resource(adapter, buffer_info); - tx_desc->upper.data = 0; - - i++; - if (i == tx_ring->count) - i = 0; - - count++; - if (count == IGB_MAX_TX_CLEAN) { - retval = false; - goto done_cleaning; - } - } - oldhead = head; - rmb(); - head = get_head(tx_ring); - if (head == oldhead) - goto done_cleaning; - } /* while (1) */ - -done_cleaning: - tx_ring->next_to_clean = i; - - if (unlikely(cleaned && - netif_carrier_ok(netdev) && - IGB_DESC_UNUSED(tx_ring) >= IGB_TX_QUEUE_WAKE)) { - /* Make sure that anybody stopping the queue after this - * sees the new next_to_clean. - */ - smp_mb(); - if (netif_queue_stopped(netdev) && - !(test_bit(__IGB_DOWN, &adapter->state))) { - netif_wake_queue(netdev); - ++adapter->restart_queue; - } - } - - if (tx_ring->detect_tx_hung) { - /* Detect a transmit hang in hardware, this serializes the - * check with the clearing of time_stamp and movement of i */ - tx_ring->detect_tx_hung = false; - if (tx_ring->buffer_info[i].time_stamp && - time_after(jiffies, tx_ring->buffer_info[i].time_stamp + - (adapter->tx_timeout_factor * HZ)) - && !(rd32(E1000_STATUS) & - E1000_STATUS_TXOFF)) { - - tx_desc = E1000_TX_DESC(*tx_ring, i); - /* detected Tx unit hang */ - dev_err(&adapter->pdev->dev, - "Detected Tx Unit Hang\n" - " Tx Queue <%lu>\n" - " TDH <%x>\n" - " TDT <%x>\n" - " next_to_use <%x>\n" - " next_to_clean <%x>\n" - " head (WB) <%x>\n" - "buffer_info[next_to_clean]\n" - " time_stamp <%lx>\n" - " jiffies <%lx>\n" - " desc.status <%x>\n", - (unsigned long)((tx_ring - adapter->tx_ring) / - sizeof(struct igb_ring)), - readl(adapter->hw.hw_addr + tx_ring->head), - readl(adapter->hw.hw_addr + tx_ring->tail), - tx_ring->next_to_use, - tx_ring->next_to_clean, - head, - tx_ring->buffer_info[i].time_stamp, - jiffies, - tx_desc->upper.fields.status); - netif_stop_queue(netdev); - } - } - tx_ring->total_bytes += total_bytes; - tx_ring->total_packets += total_packets; - adapter->net_stats.tx_bytes += total_bytes; - adapter->net_stats.tx_packets += total_packets; - return retval; -} - - -/** - * igb_receive_skb - helper function to handle rx indications - * @adapter: board private structure - * @status: descriptor status field as written by hardware - * @vlan: descriptor vlan field as written by hardware (no le/be conversion) - * @skb: pointer to sk_buff to be indicated to stack - **/ -static void igb_receive_skb(struct igb_adapter *adapter, u8 status, __le16 vlan, - struct sk_buff *skb) -{ - if (adapter->vlgrp && (status & E1000_RXD_STAT_VP)) - vlan_hwaccel_receive_skb(skb, adapter->vlgrp, - le16_to_cpu(vlan) & - E1000_RXD_SPC_VLAN_MASK); - else - netif_receive_skb(skb); -} - - -static inline void igb_rx_checksum_adv(struct igb_adapter *adapter, - u32 status_err, struct sk_buff *skb) -{ - skb->ip_summed = CHECKSUM_NONE; - - /* Ignore Checksum bit is set or checksum is disabled through ethtool */ - if ((status_err & E1000_RXD_STAT_IXSM) || !adapter->rx_csum) - return; - /* TCP/UDP checksum error bit is set */ - if (status_err & - (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) { - /* let the stack verify checksum errors */ - adapter->hw_csum_err++; - return; - } - /* It must be a TCP or UDP packet with a valid checksum */ - if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)) - skb->ip_summed = CHECKSUM_UNNECESSARY; - - adapter->hw_csum_good++; -} - -static bool igb_clean_rx_irq_adv(struct igb_adapter *adapter, - struct igb_ring *rx_ring, - int *work_done, int budget) -{ - struct net_device *netdev = adapter->netdev; - struct pci_dev *pdev = adapter->pdev; - union e1000_adv_rx_desc *rx_desc , *next_rxd; - struct igb_buffer *buffer_info , *next_buffer; - struct sk_buff *skb; - unsigned int i, j; - u32 length, hlen, staterr; - bool cleaned = false; - int cleaned_count = 0; - unsigned int total_bytes = 0, total_packets = 0; - - i = rx_ring->next_to_clean; - rx_desc = E1000_RX_DESC_ADV(*rx_ring, i); - staterr = le32_to_cpu(rx_desc->wb.upper.status_error); - - while (staterr & E1000_RXD_STAT_DD) { - if (*work_done >= budget) - break; - (*work_done)++; - buffer_info = &rx_ring->buffer_info[i]; - - /* HW will not DMA in data larger than the given buffer, even - * if it parses the (NFS, of course) header to be larger. In - * that case, it fills the header buffer and spills the rest - * into the page. - */ - hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hdr_info) & - E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT; - if (hlen > adapter->rx_ps_hdr_size) - hlen = adapter->rx_ps_hdr_size; - - length = le16_to_cpu(rx_desc->wb.upper.length); - cleaned = true; - cleaned_count++; - - if (rx_ring->pending_skb != NULL) { - skb = rx_ring->pending_skb; - rx_ring->pending_skb = NULL; - j = rx_ring->pending_skb_page; - } else { - skb = buffer_info->skb; - prefetch(skb->data - NET_IP_ALIGN); - buffer_info->skb = NULL; - if (hlen) { - pci_unmap_single(pdev, buffer_info->dma, - adapter->rx_ps_hdr_size + - NET_IP_ALIGN, - PCI_DMA_FROMDEVICE); - skb_put(skb, hlen); - } else { - pci_unmap_single(pdev, buffer_info->dma, - adapter->rx_buffer_len + - NET_IP_ALIGN, - PCI_DMA_FROMDEVICE); - skb_put(skb, length); - goto send_up; - } - j = 0; - } - - while (length) { - pci_unmap_page(pdev, buffer_info->page_dma, - PAGE_SIZE, PCI_DMA_FROMDEVICE); - buffer_info->page_dma = 0; - skb_fill_page_desc(skb, j, buffer_info->page, - 0, length); - buffer_info->page = NULL; - - skb->len += length; - skb->data_len += length; - skb->truesize += length; - rx_desc->wb.upper.status_error = 0; - if (staterr & E1000_RXD_STAT_EOP) - break; - - j++; - cleaned_count++; - i++; - if (i == rx_ring->count) - i = 0; - - buffer_info = &rx_ring->buffer_info[i]; - rx_desc = E1000_RX_DESC_ADV(*rx_ring, i); - staterr = le32_to_cpu(rx_desc->wb.upper.status_error); - length = le16_to_cpu(rx_desc->wb.upper.length); - if (!(staterr & E1000_RXD_STAT_DD)) { - rx_ring->pending_skb = skb; - rx_ring->pending_skb_page = j; - goto out; - } - } -send_up: - pskb_trim(skb, skb->len - 4); - i++; - if (i == rx_ring->count) - i = 0; - next_rxd = E1000_RX_DESC_ADV(*rx_ring, i); - prefetch(next_rxd); - next_buffer = &rx_ring->buffer_info[i]; - - if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) { - dev_kfree_skb_irq(skb); - goto next_desc; - } - rx_ring->no_itr_adjust |= (staterr & E1000_RXD_STAT_DYNINT); - - total_bytes += skb->len; - total_packets++; - - igb_rx_checksum_adv(adapter, staterr, skb); - - skb->protocol = eth_type_trans(skb, netdev); - - igb_receive_skb(adapter, staterr, rx_desc->wb.upper.vlan, skb); - - netdev->last_rx = jiffies; - -next_desc: - rx_desc->wb.upper.status_error = 0; - - /* return some buffers to hardware, one at a time is too slow */ - if (cleaned_count >= IGB_RX_BUFFER_WRITE) { - igb_alloc_rx_buffers_adv(adapter, rx_ring, - cleaned_count); - cleaned_count = 0; - } - - /* use prefetched values */ - rx_desc = next_rxd; - buffer_info = next_buffer; - - staterr = le32_to_cpu(rx_desc->wb.upper.status_error); - } -out: - rx_ring->next_to_clean = i; - cleaned_count = IGB_DESC_UNUSED(rx_ring); - - if (cleaned_count) - igb_alloc_rx_buffers_adv(adapter, rx_ring, cleaned_count); - - rx_ring->total_packets += total_packets; - rx_ring->total_bytes += total_bytes; - rx_ring->rx_stats.packets += total_packets; - rx_ring->rx_stats.bytes += total_bytes; - adapter->net_stats.rx_bytes += total_bytes; - adapter->net_stats.rx_packets += total_packets; - return cleaned; -} - - -/** - * igb_alloc_rx_buffers_adv - Replace used receive buffers; packet split - * @adapter: address of board private structure - **/ -static void igb_alloc_rx_buffers_adv(struct igb_adapter *adapter, - struct igb_ring *rx_ring, - int cleaned_count) -{ - struct net_device *netdev = adapter->netdev; - struct pci_dev *pdev = adapter->pdev; - union e1000_adv_rx_desc *rx_desc; - struct igb_buffer *buffer_info; - struct sk_buff *skb; - unsigned int i; - - i = rx_ring->next_to_use; - buffer_info = &rx_ring->buffer_info[i]; - - while (cleaned_count--) { - rx_desc = E1000_RX_DESC_ADV(*rx_ring, i); - - if (adapter->rx_ps_hdr_size && !buffer_info->page) { - buffer_info->page = alloc_page(GFP_ATOMIC); - if (!buffer_info->page) { - adapter->alloc_rx_buff_failed++; - goto no_buffers; - } - buffer_info->page_dma = - pci_map_page(pdev, - buffer_info->page, - 0, PAGE_SIZE, - PCI_DMA_FROMDEVICE); - } - - if (!buffer_info->skb) { - int bufsz; - - if (adapter->rx_ps_hdr_size) - bufsz = adapter->rx_ps_hdr_size; - else - bufsz = adapter->rx_buffer_len; - bufsz += NET_IP_ALIGN; - skb = netdev_alloc_skb(netdev, bufsz); - - if (!skb) { - adapter->alloc_rx_buff_failed++; - goto no_buffers; - } - - /* Make buffer alignment 2 beyond a 16 byte boundary - * this will result in a 16 byte aligned IP header after - * the 14 byte MAC header is removed - */ - skb_reserve(skb, NET_IP_ALIGN); - - buffer_info->skb = skb; - buffer_info->dma = pci_map_single(pdev, skb->data, - bufsz, - PCI_DMA_FROMDEVICE); - - } - /* Refresh the desc even if buffer_addrs didn't change because - * each write-back erases this info. */ - if (adapter->rx_ps_hdr_size) { - rx_desc->read.pkt_addr = - cpu_to_le64(buffer_info->page_dma); - rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma); - } else { - rx_desc->read.pkt_addr = - cpu_to_le64(buffer_info->dma); - rx_desc->read.hdr_addr = 0; - } - - i++; - if (i == rx_ring->count) - i = 0; - buffer_info = &rx_ring->buffer_info[i]; - } - -no_buffers: - if (rx_ring->next_to_use != i) { - rx_ring->next_to_use = i; - if (i == 0) - i = (rx_ring->count - 1); - else - 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(); - writel(i, adapter->hw.hw_addr + rx_ring->tail); - } -} - -/** - * igb_mii_ioctl - - * @netdev: - * @ifreq: - * @cmd: - **/ -static int igb_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) -{ - struct igb_adapter *adapter = netdev_priv(netdev); - struct mii_ioctl_data *data = if_mii(ifr); - - if (adapter->hw.phy.media_type != e1000_media_type_copper) - return -EOPNOTSUPP; - - switch (cmd) { - case SIOCGMIIPHY: - data->phy_id = adapter->hw.phy.addr; - break; - case SIOCGMIIREG: - if (!capable(CAP_NET_ADMIN)) - return -EPERM; - if (adapter->hw.phy.ops.read_phy_reg(&adapter->hw, - data->reg_num - & 0x1F, &data->val_out)) - return -EIO; - break; - case SIOCSMIIREG: - default: - return -EOPNOTSUPP; - } - return 0; -} - -/** - * igb_ioctl - - * @netdev: - * @ifreq: - * @cmd: - **/ -static int igb_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) -{ - switch (cmd) { - case SIOCGMIIPHY: - case SIOCGMIIREG: - case SIOCSMIIREG: - return igb_mii_ioctl(netdev, ifr, cmd); - default: - return -EOPNOTSUPP; - } -} - -static void igb_vlan_rx_register(struct net_device *netdev, - struct vlan_group *grp) -{ - struct igb_adapter *adapter = netdev_priv(netdev); - struct e1000_hw *hw = &adapter->hw; - u32 ctrl, rctl; - - igb_irq_disable(adapter); - adapter->vlgrp = grp; - - if (grp) { - /* enable VLAN tag insert/strip */ - ctrl = rd32(E1000_CTRL); - ctrl |= E1000_CTRL_VME; - wr32(E1000_CTRL, ctrl); - - /* enable VLAN receive filtering */ - rctl = rd32(E1000_RCTL); - rctl |= E1000_RCTL_VFE; - rctl &= ~E1000_RCTL_CFIEN; - wr32(E1000_RCTL, rctl); - igb_update_mng_vlan(adapter); - wr32(E1000_RLPML, - adapter->max_frame_size + VLAN_TAG_SIZE); - } else { - /* disable VLAN tag insert/strip */ - ctrl = rd32(E1000_CTRL); - ctrl &= ~E1000_CTRL_VME; - wr32(E1000_CTRL, ctrl); - - /* disable VLAN filtering */ - rctl = rd32(E1000_RCTL); - rctl &= ~E1000_RCTL_VFE; - wr32(E1000_RCTL, rctl); - if (adapter->mng_vlan_id != (u16)IGB_MNG_VLAN_NONE) { - igb_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id); - adapter->mng_vlan_id = IGB_MNG_VLAN_NONE; - } - wr32(E1000_RLPML, - adapter->max_frame_size); - } - - if (!test_bit(__IGB_DOWN, &adapter->state)) - igb_irq_enable(adapter); -} - -static void igb_vlan_rx_add_vid(struct net_device *netdev, u16 vid) -{ - struct igb_adapter *adapter = netdev_priv(netdev); - struct e1000_hw *hw = &adapter->hw; - u32 vfta, index; - - if ((adapter->hw.mng_cookie.status & - E1000_MNG_DHCP_COOKIE_STATUS_VLAN) && - (vid == adapter->mng_vlan_id)) - return; - /* add VID to filter table */ - index = (vid >> 5) & 0x7F; - vfta = array_rd32(E1000_VFTA, index); - vfta |= (1 << (vid & 0x1F)); - igb_write_vfta(&adapter->hw, index, vfta); -} - -static void igb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) -{ - struct igb_adapter *adapter = netdev_priv(netdev); - struct e1000_hw *hw = &adapter->hw; - u32 vfta, index; - - igb_irq_disable(adapter); - vlan_group_set_device(adapter->vlgrp, vid, NULL); - - if (!test_bit(__IGB_DOWN, &adapter->state)) - igb_irq_enable(adapter); - - if ((adapter->hw.mng_cookie.status & - E1000_MNG_DHCP_COOKIE_STATUS_VLAN) && - (vid == adapter->mng_vlan_id)) { - /* release control to f/w */ - igb_release_hw_control(adapter); - return; - } - - /* remove VID from filter table */ - index = (vid >> 5) & 0x7F; - vfta = array_rd32(E1000_VFTA, index); - vfta &= ~(1 << (vid & 0x1F)); - igb_write_vfta(&adapter->hw, index, vfta); -} - -static void igb_restore_vlan(struct igb_adapter *adapter) -{ - igb_vlan_rx_register(adapter->netdev, adapter->vlgrp); - - if (adapter->vlgrp) { - u16 vid; - for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) { - if (!vlan_group_get_device(adapter->vlgrp, vid)) - continue; - igb_vlan_rx_add_vid(adapter->netdev, vid); - } - } -} - -int igb_set_spd_dplx(struct igb_adapter *adapter, u16 spddplx) -{ - struct e1000_mac_info *mac = &adapter->hw.mac; - - mac->autoneg = 0; - - /* Fiber NICs only allow 1000 gbps Full duplex */ - if ((adapter->hw.phy.media_type == e1000_media_type_fiber) && - spddplx != (SPEED_1000 + DUPLEX_FULL)) { - dev_err(&adapter->pdev->dev, - "Unsupported Speed/Duplex configuration\n"); - return -EINVAL; - } - - switch (spddplx) { - case SPEED_10 + DUPLEX_HALF: - mac->forced_speed_duplex = ADVERTISE_10_HALF; - break; - case SPEED_10 + DUPLEX_FULL: - mac->forced_speed_duplex = ADVERTISE_10_FULL; - break; - case SPEED_100 + DUPLEX_HALF: - mac->forced_speed_duplex = ADVERTISE_100_HALF; - break; - case SPEED_100 + DUPLEX_FULL: - mac->forced_speed_duplex = ADVERTISE_100_FULL; - break; - case SPEED_1000 + DUPLEX_FULL: - mac->autoneg = 1; - adapter->hw.phy.autoneg_advertised = ADVERTISE_1000_FULL; - break; - case SPEED_1000 + DUPLEX_HALF: /* not supported */ - default: - dev_err(&adapter->pdev->dev, - "Unsupported Speed/Duplex configuration\n"); - return -EINVAL; - } - return 0; -} - - -static int igb_suspend(struct pci_dev *pdev, pm_message_t state) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct igb_adapter *adapter = netdev_priv(netdev); - struct e1000_hw *hw = &adapter->hw; - u32 ctrl, ctrl_ext, rctl, status; - u32 wufc = adapter->wol; -#ifdef CONFIG_PM - int retval = 0; -#endif - - netif_device_detach(netdev); - - if (netif_running(netdev)) { - WARN_ON(test_bit(__IGB_RESETTING, &adapter->state)); - igb_down(adapter); - igb_free_irq(adapter); - } - -#ifdef CONFIG_PM - retval = pci_save_state(pdev); - if (retval) - return retval; -#endif - - status = rd32(E1000_STATUS); - if (status & E1000_STATUS_LU) - wufc &= ~E1000_WUFC_LNKC; - - if (wufc) { - igb_setup_rctl(adapter); - igb_set_multi(netdev); - - /* turn on all-multi mode if wake on multicast is enabled */ - if (wufc & E1000_WUFC_MC) { - rctl = rd32(E1000_RCTL); - rctl |= E1000_RCTL_MPE; - wr32(E1000_RCTL, rctl); - } - - ctrl = rd32(E1000_CTRL); - /* advertise wake from D3Cold */ - #define E1000_CTRL_ADVD3WUC 0x00100000 - /* phy power management enable */ - #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000 - ctrl |= E1000_CTRL_ADVD3WUC; - wr32(E1000_CTRL, ctrl); - - if (adapter->hw.phy.media_type == e1000_media_type_fiber || - adapter->hw.phy.media_type == - e1000_media_type_internal_serdes) { - /* keep the laser running in D3 */ - ctrl_ext = rd32(E1000_CTRL_EXT); - ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA; - wr32(E1000_CTRL_EXT, ctrl_ext); - } - - /* Allow time for pending master requests to run */ - igb_disable_pcie_master(&adapter->hw); - - wr32(E1000_WUC, E1000_WUC_PME_EN); - wr32(E1000_WUFC, wufc); - pci_enable_wake(pdev, PCI_D3hot, 1); - pci_enable_wake(pdev, PCI_D3cold, 1); - } else { - wr32(E1000_WUC, 0); - wr32(E1000_WUFC, 0); - pci_enable_wake(pdev, PCI_D3hot, 0); - pci_enable_wake(pdev, PCI_D3cold, 0); - } - - /* make sure adapter isn't asleep if manageability is enabled */ - if (adapter->en_mng_pt) { - pci_enable_wake(pdev, PCI_D3hot, 1); - pci_enable_wake(pdev, PCI_D3cold, 1); - } - - /* Release control of h/w to f/w. If f/w is AMT enabled, this - * would have already happened in close and is redundant. */ - igb_release_hw_control(adapter); - - pci_disable_device(pdev); - - pci_set_power_state(pdev, pci_choose_state(pdev, state)); - - return 0; -} - -#ifdef CONFIG_PM -static int igb_resume(struct pci_dev *pdev) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct igb_adapter *adapter = netdev_priv(netdev); - struct e1000_hw *hw = &adapter->hw; - u32 err; - - pci_set_power_state(pdev, PCI_D0); - pci_restore_state(pdev); - err = pci_enable_device(pdev); - if (err) { - dev_err(&pdev->dev, - "igb: Cannot enable PCI device from suspend\n"); - return err; - } - pci_set_master(pdev); - - pci_enable_wake(pdev, PCI_D3hot, 0); - pci_enable_wake(pdev, PCI_D3cold, 0); - - if (netif_running(netdev)) { - err = igb_request_irq(adapter); - if (err) - return err; - } - - /* e1000_power_up_phy(adapter); */ - - igb_reset(adapter); - wr32(E1000_WUS, ~0); - - igb_init_manageability(adapter); - - if (netif_running(netdev)) - igb_up(adapter); - - netif_device_attach(netdev); - - /* let the f/w know that the h/w is now under the control of the - * driver. */ - igb_get_hw_control(adapter); - - return 0; -} -#endif - -static void igb_shutdown(struct pci_dev *pdev) -{ - igb_suspend(pdev, PMSG_SUSPEND); -} - -#ifdef CONFIG_NET_POLL_CONTROLLER -/* - * Polling 'interrupt' - used by things like netconsole to send skbs - * without having to re-enable interrupts. It's not called while - * the interrupt routine is executing. - */ -static void igb_netpoll(struct net_device *netdev) -{ - struct igb_adapter *adapter = netdev_priv(netdev); - int i; - int work_done = 0; - - igb_irq_disable(adapter); - for (i = 0; i < adapter->num_tx_queues; i++) - igb_clean_tx_irq(adapter, &adapter->tx_ring[i]); - - for (i = 0; i < adapter->num_rx_queues; i++) - igb_clean_rx_irq_adv(adapter, &adapter->rx_ring[i], - &work_done, - adapter->rx_ring[i].napi.weight); - - igb_irq_enable(adapter); -} -#endif /* CONFIG_NET_POLL_CONTROLLER */ - -/** - * igb_io_error_detected - called when PCI error is detected - * @pdev: Pointer to PCI device - * @state: The current pci connection state - * - * This function is called after a PCI bus error affecting - * this device has been detected. - */ -static pci_ers_result_t igb_io_error_detected(struct pci_dev *pdev, - pci_channel_state_t state) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct igb_adapter *adapter = netdev_priv(netdev); - - netif_device_detach(netdev); - - if (netif_running(netdev)) - igb_down(adapter); - pci_disable_device(pdev); - - /* Request a slot slot reset. */ - return PCI_ERS_RESULT_NEED_RESET; -} - -/** - * igb_io_slot_reset - called after the pci bus has been reset. - * @pdev: Pointer to PCI device - * - * Restart the card from scratch, as if from a cold-boot. Implementation - * resembles the first-half of the igb_resume routine. - */ -static pci_ers_result_t igb_io_slot_reset(struct pci_dev *pdev) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct igb_adapter *adapter = netdev_priv(netdev); - struct e1000_hw *hw = &adapter->hw; - - if (pci_enable_device(pdev)) { - dev_err(&pdev->dev, - "Cannot re-enable PCI device after reset.\n"); - return PCI_ERS_RESULT_DISCONNECT; - } - pci_set_master(pdev); - - pci_enable_wake(pdev, PCI_D3hot, 0); - pci_enable_wake(pdev, PCI_D3cold, 0); - - igb_reset(adapter); - wr32(E1000_WUS, ~0); - - return PCI_ERS_RESULT_RECOVERED; -} - -/** - * igb_io_resume - called when traffic can start flowing again. - * @pdev: Pointer to PCI device - * - * This callback is called when the error recovery driver tells us that - * its OK to resume normal operation. Implementation resembles the - * second-half of the igb_resume routine. - */ -static void igb_io_resume(struct pci_dev *pdev) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct igb_adapter *adapter = netdev_priv(netdev); - - igb_init_manageability(adapter); - - if (netif_running(netdev)) { - if (igb_up(adapter)) { - dev_err(&pdev->dev, "igb_up failed after reset\n"); - return; - } - } - - netif_device_attach(netdev); - - /* let the f/w know that the h/w is now under the control of the - * driver. */ - igb_get_hw_control(adapter); - -} - -/* igb_main.c */ |