diff options
Diffstat (limited to 'drivers/net/ethernet/intel/e1000/e1000_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000/e1000_main.c | 5316 |
1 files changed, 5316 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c new file mode 100644 index 000000000..61e60e4de --- /dev/null +++ b/drivers/net/ethernet/intel/e1000/e1000_main.c @@ -0,0 +1,5316 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 1999 - 2006 Intel Corporation. */ + +#include "e1000.h" +#include <net/ip6_checksum.h> +#include <linux/io.h> +#include <linux/prefetch.h> +#include <linux/bitops.h> +#include <linux/if_vlan.h> + +char e1000_driver_name[] = "e1000"; +static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver"; +static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation."; + +/* e1000_pci_tbl - PCI Device ID Table + * + * Last entry must be all 0s + * + * Macro expands to... + * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)} + */ +static const struct pci_device_id e1000_pci_tbl[] = { + INTEL_E1000_ETHERNET_DEVICE(0x1000), + INTEL_E1000_ETHERNET_DEVICE(0x1001), + INTEL_E1000_ETHERNET_DEVICE(0x1004), + INTEL_E1000_ETHERNET_DEVICE(0x1008), + INTEL_E1000_ETHERNET_DEVICE(0x1009), + INTEL_E1000_ETHERNET_DEVICE(0x100C), + INTEL_E1000_ETHERNET_DEVICE(0x100D), + INTEL_E1000_ETHERNET_DEVICE(0x100E), + INTEL_E1000_ETHERNET_DEVICE(0x100F), + INTEL_E1000_ETHERNET_DEVICE(0x1010), + INTEL_E1000_ETHERNET_DEVICE(0x1011), + INTEL_E1000_ETHERNET_DEVICE(0x1012), + INTEL_E1000_ETHERNET_DEVICE(0x1013), + INTEL_E1000_ETHERNET_DEVICE(0x1014), + INTEL_E1000_ETHERNET_DEVICE(0x1015), + INTEL_E1000_ETHERNET_DEVICE(0x1016), + INTEL_E1000_ETHERNET_DEVICE(0x1017), + INTEL_E1000_ETHERNET_DEVICE(0x1018), + INTEL_E1000_ETHERNET_DEVICE(0x1019), + INTEL_E1000_ETHERNET_DEVICE(0x101A), + INTEL_E1000_ETHERNET_DEVICE(0x101D), + INTEL_E1000_ETHERNET_DEVICE(0x101E), + INTEL_E1000_ETHERNET_DEVICE(0x1026), + INTEL_E1000_ETHERNET_DEVICE(0x1027), + INTEL_E1000_ETHERNET_DEVICE(0x1028), + INTEL_E1000_ETHERNET_DEVICE(0x1075), + INTEL_E1000_ETHERNET_DEVICE(0x1076), + INTEL_E1000_ETHERNET_DEVICE(0x1077), + INTEL_E1000_ETHERNET_DEVICE(0x1078), + INTEL_E1000_ETHERNET_DEVICE(0x1079), + INTEL_E1000_ETHERNET_DEVICE(0x107A), + INTEL_E1000_ETHERNET_DEVICE(0x107B), + INTEL_E1000_ETHERNET_DEVICE(0x107C), + INTEL_E1000_ETHERNET_DEVICE(0x108A), + INTEL_E1000_ETHERNET_DEVICE(0x1099), + INTEL_E1000_ETHERNET_DEVICE(0x10B5), + INTEL_E1000_ETHERNET_DEVICE(0x2E6E), + /* required last entry */ + {0,} +}; + +MODULE_DEVICE_TABLE(pci, e1000_pci_tbl); + +int e1000_up(struct e1000_adapter *adapter); +void e1000_down(struct e1000_adapter *adapter); +void e1000_reinit_locked(struct e1000_adapter *adapter); +void e1000_reset(struct e1000_adapter *adapter); +int e1000_setup_all_tx_resources(struct e1000_adapter *adapter); +int e1000_setup_all_rx_resources(struct e1000_adapter *adapter); +void e1000_free_all_tx_resources(struct e1000_adapter *adapter); +void e1000_free_all_rx_resources(struct e1000_adapter *adapter); +static int e1000_setup_tx_resources(struct e1000_adapter *adapter, + struct e1000_tx_ring *txdr); +static int e1000_setup_rx_resources(struct e1000_adapter *adapter, + struct e1000_rx_ring *rxdr); +static void e1000_free_tx_resources(struct e1000_adapter *adapter, + struct e1000_tx_ring *tx_ring); +static void e1000_free_rx_resources(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring); +void e1000_update_stats(struct e1000_adapter *adapter); + +static int e1000_init_module(void); +static void e1000_exit_module(void); +static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent); +static void e1000_remove(struct pci_dev *pdev); +static int e1000_alloc_queues(struct e1000_adapter *adapter); +static int e1000_sw_init(struct e1000_adapter *adapter); +int e1000_open(struct net_device *netdev); +int e1000_close(struct net_device *netdev); +static void e1000_configure_tx(struct e1000_adapter *adapter); +static void e1000_configure_rx(struct e1000_adapter *adapter); +static void e1000_setup_rctl(struct e1000_adapter *adapter); +static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter); +static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter); +static void e1000_clean_tx_ring(struct e1000_adapter *adapter, + struct e1000_tx_ring *tx_ring); +static void e1000_clean_rx_ring(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring); +static void e1000_set_rx_mode(struct net_device *netdev); +static void e1000_update_phy_info_task(struct work_struct *work); +static void e1000_watchdog(struct work_struct *work); +static void e1000_82547_tx_fifo_stall_task(struct work_struct *work); +static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, + struct net_device *netdev); +static int e1000_change_mtu(struct net_device *netdev, int new_mtu); +static int e1000_set_mac(struct net_device *netdev, void *p); +static irqreturn_t e1000_intr(int irq, void *data); +static bool e1000_clean_tx_irq(struct e1000_adapter *adapter, + struct e1000_tx_ring *tx_ring); +static int e1000_clean(struct napi_struct *napi, int budget); +static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring, + int *work_done, int work_to_do); +static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring, + int *work_done, int work_to_do); +static void e1000_alloc_dummy_rx_buffers(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring, + int cleaned_count) +{ +} +static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring, + int cleaned_count); +static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring, + int cleaned_count); +static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd); +static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, + int cmd); +static void e1000_enter_82542_rst(struct e1000_adapter *adapter); +static void e1000_leave_82542_rst(struct e1000_adapter *adapter); +static void e1000_tx_timeout(struct net_device *dev, unsigned int txqueue); +static void e1000_reset_task(struct work_struct *work); +static void e1000_smartspeed(struct e1000_adapter *adapter); +static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, + struct sk_buff *skb); + +static bool e1000_vlan_used(struct e1000_adapter *adapter); +static void e1000_vlan_mode(struct net_device *netdev, + netdev_features_t features); +static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter, + bool filter_on); +static int e1000_vlan_rx_add_vid(struct net_device *netdev, + __be16 proto, u16 vid); +static int e1000_vlan_rx_kill_vid(struct net_device *netdev, + __be16 proto, u16 vid); +static void e1000_restore_vlan(struct e1000_adapter *adapter); + +static int __maybe_unused e1000_suspend(struct device *dev); +static int __maybe_unused e1000_resume(struct device *dev); +static void e1000_shutdown(struct pci_dev *pdev); + +#ifdef CONFIG_NET_POLL_CONTROLLER +/* for netdump / net console */ +static void e1000_netpoll (struct net_device *netdev); +#endif + +#define COPYBREAK_DEFAULT 256 +static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT; +module_param(copybreak, uint, 0644); +MODULE_PARM_DESC(copybreak, + "Maximum size of packet that is copied to a new buffer on receive"); + +static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, + pci_channel_state_t state); +static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev); +static void e1000_io_resume(struct pci_dev *pdev); + +static const struct pci_error_handlers e1000_err_handler = { + .error_detected = e1000_io_error_detected, + .slot_reset = e1000_io_slot_reset, + .resume = e1000_io_resume, +}; + +static SIMPLE_DEV_PM_OPS(e1000_pm_ops, e1000_suspend, e1000_resume); + +static struct pci_driver e1000_driver = { + .name = e1000_driver_name, + .id_table = e1000_pci_tbl, + .probe = e1000_probe, + .remove = e1000_remove, + .driver = { + .pm = &e1000_pm_ops, + }, + .shutdown = e1000_shutdown, + .err_handler = &e1000_err_handler +}; + +MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); +MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver"); +MODULE_LICENSE("GPL v2"); + +#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) +static int debug = -1; +module_param(debug, int, 0); +MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); + +/** + * e1000_get_hw_dev - helper function for getting netdev + * @hw: pointer to HW struct + * + * return device used by hardware layer to print debugging information + * + **/ +struct net_device *e1000_get_hw_dev(struct e1000_hw *hw) +{ + struct e1000_adapter *adapter = hw->back; + return adapter->netdev; +} + +/** + * e1000_init_module - Driver Registration Routine + * + * e1000_init_module is the first routine called when the driver is + * loaded. All it does is register with the PCI subsystem. + **/ +static int __init e1000_init_module(void) +{ + int ret; + pr_info("%s\n", e1000_driver_string); + + pr_info("%s\n", e1000_copyright); + + ret = pci_register_driver(&e1000_driver); + if (copybreak != COPYBREAK_DEFAULT) { + if (copybreak == 0) + pr_info("copybreak disabled\n"); + else + pr_info("copybreak enabled for " + "packets <= %u bytes\n", copybreak); + } + return ret; +} + +module_init(e1000_init_module); + +/** + * e1000_exit_module - Driver Exit Cleanup Routine + * + * e1000_exit_module is called just before the driver is removed + * from memory. + **/ +static void __exit e1000_exit_module(void) +{ + pci_unregister_driver(&e1000_driver); +} + +module_exit(e1000_exit_module); + +static int e1000_request_irq(struct e1000_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + irq_handler_t handler = e1000_intr; + int irq_flags = IRQF_SHARED; + int err; + + err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name, + netdev); + if (err) { + e_err(probe, "Unable to allocate interrupt Error: %d\n", err); + } + + return err; +} + +static void e1000_free_irq(struct e1000_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + + free_irq(adapter->pdev->irq, netdev); +} + +/** + * e1000_irq_disable - Mask off interrupt generation on the NIC + * @adapter: board private structure + **/ +static void e1000_irq_disable(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + + ew32(IMC, ~0); + E1000_WRITE_FLUSH(); + synchronize_irq(adapter->pdev->irq); +} + +/** + * e1000_irq_enable - Enable default interrupt generation settings + * @adapter: board private structure + **/ +static void e1000_irq_enable(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + + ew32(IMS, IMS_ENABLE_MASK); + E1000_WRITE_FLUSH(); +} + +static void e1000_update_mng_vlan(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + struct net_device *netdev = adapter->netdev; + u16 vid = hw->mng_cookie.vlan_id; + u16 old_vid = adapter->mng_vlan_id; + + if (!e1000_vlan_used(adapter)) + return; + + if (!test_bit(vid, adapter->active_vlans)) { + if (hw->mng_cookie.status & + E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) { + e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid); + adapter->mng_vlan_id = vid; + } else { + adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; + } + if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && + (vid != old_vid) && + !test_bit(old_vid, adapter->active_vlans)) + e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), + old_vid); + } else { + adapter->mng_vlan_id = vid; + } +} + +static void e1000_init_manageability(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + + if (adapter->en_mng_pt) { + u32 manc = er32(MANC); + + /* disable hardware interception of ARP */ + manc &= ~(E1000_MANC_ARP_EN); + + ew32(MANC, manc); + } +} + +static void e1000_release_manageability(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + + if (adapter->en_mng_pt) { + u32 manc = er32(MANC); + + /* re-enable hardware interception of ARP */ + manc |= E1000_MANC_ARP_EN; + + ew32(MANC, manc); + } +} + +/** + * e1000_configure - configure the hardware for RX and TX + * @adapter: private board structure + **/ +static void e1000_configure(struct e1000_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + int i; + + e1000_set_rx_mode(netdev); + + e1000_restore_vlan(adapter); + e1000_init_manageability(adapter); + + e1000_configure_tx(adapter); + e1000_setup_rctl(adapter); + e1000_configure_rx(adapter); + /* call E1000_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 e1000_rx_ring *ring = &adapter->rx_ring[i]; + adapter->alloc_rx_buf(adapter, ring, + E1000_DESC_UNUSED(ring)); + } +} + +int e1000_up(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + + /* hardware has been reset, we need to reload some things */ + e1000_configure(adapter); + + clear_bit(__E1000_DOWN, &adapter->flags); + + napi_enable(&adapter->napi); + + e1000_irq_enable(adapter); + + netif_wake_queue(adapter->netdev); + + /* fire a link change interrupt to start the watchdog */ + ew32(ICS, E1000_ICS_LSC); + return 0; +} + +/** + * e1000_power_up_phy - restore link in case the phy was powered down + * @adapter: address of board private structure + * + * The phy may be powered down to save power and turn off link when the + * driver is unloaded and wake on lan is not enabled (among others) + * *** this routine MUST be followed by a call to e1000_reset *** + **/ +void e1000_power_up_phy(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + u16 mii_reg = 0; + + /* Just clear the power down bit to wake the phy back up */ + if (hw->media_type == e1000_media_type_copper) { + /* according to the manual, the phy will retain its + * settings across a power-down/up cycle + */ + e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg); + mii_reg &= ~MII_CR_POWER_DOWN; + e1000_write_phy_reg(hw, PHY_CTRL, mii_reg); + } +} + +static void e1000_power_down_phy(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + + /* Power down the PHY so no link is implied when interface is down * + * The PHY cannot be powered down if any of the following is true * + * (a) WoL is enabled + * (b) AMT is active + * (c) SoL/IDER session is active + */ + if (!adapter->wol && hw->mac_type >= e1000_82540 && + hw->media_type == e1000_media_type_copper) { + u16 mii_reg = 0; + + switch (hw->mac_type) { + case e1000_82540: + case e1000_82545: + case e1000_82545_rev_3: + case e1000_82546: + case e1000_ce4100: + case e1000_82546_rev_3: + case e1000_82541: + case e1000_82541_rev_2: + case e1000_82547: + case e1000_82547_rev_2: + if (er32(MANC) & E1000_MANC_SMBUS_EN) + goto out; + break; + default: + goto out; + } + e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg); + mii_reg |= MII_CR_POWER_DOWN; + e1000_write_phy_reg(hw, PHY_CTRL, mii_reg); + msleep(1); + } +out: + return; +} + +static void e1000_down_and_stop(struct e1000_adapter *adapter) +{ + set_bit(__E1000_DOWN, &adapter->flags); + + cancel_delayed_work_sync(&adapter->watchdog_task); + + /* + * Since the watchdog task can reschedule other tasks, we should cancel + * it first, otherwise we can run into the situation when a work is + * still running after the adapter has been turned down. + */ + + cancel_delayed_work_sync(&adapter->phy_info_task); + cancel_delayed_work_sync(&adapter->fifo_stall_task); + + /* Only kill reset task if adapter is not resetting */ + if (!test_bit(__E1000_RESETTING, &adapter->flags)) + cancel_work_sync(&adapter->reset_task); +} + +void e1000_down(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + struct net_device *netdev = adapter->netdev; + u32 rctl, tctl; + + /* disable receives in the hardware */ + rctl = er32(RCTL); + ew32(RCTL, rctl & ~E1000_RCTL_EN); + /* flush and sleep below */ + + netif_tx_disable(netdev); + + /* disable transmits in the hardware */ + tctl = er32(TCTL); + tctl &= ~E1000_TCTL_EN; + ew32(TCTL, tctl); + /* flush both disables and wait for them to finish */ + E1000_WRITE_FLUSH(); + msleep(10); + + /* Set the carrier off after transmits have been disabled in the + * hardware, to avoid race conditions with e1000_watchdog() (which + * may be running concurrently to us, checking for the carrier + * bit to decide whether it should enable transmits again). Such + * a race condition would result into transmission being disabled + * in the hardware until the next IFF_DOWN+IFF_UP cycle. + */ + netif_carrier_off(netdev); + + napi_disable(&adapter->napi); + + e1000_irq_disable(adapter); + + /* Setting DOWN must be after irq_disable to prevent + * a screaming interrupt. Setting DOWN also prevents + * tasks from rescheduling. + */ + e1000_down_and_stop(adapter); + + adapter->link_speed = 0; + adapter->link_duplex = 0; + + e1000_reset(adapter); + e1000_clean_all_tx_rings(adapter); + e1000_clean_all_rx_rings(adapter); +} + +void e1000_reinit_locked(struct e1000_adapter *adapter) +{ + while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) + msleep(1); + + /* only run the task if not already down */ + if (!test_bit(__E1000_DOWN, &adapter->flags)) { + e1000_down(adapter); + e1000_up(adapter); + } + + clear_bit(__E1000_RESETTING, &adapter->flags); +} + +void e1000_reset(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + u32 pba = 0, tx_space, min_tx_space, min_rx_space; + bool legacy_pba_adjust = false; + u16 hwm; + + /* Repartition Pba for greater than 9k mtu + * To take effect CTRL.RST is required. + */ + + switch (hw->mac_type) { + case e1000_82542_rev2_0: + case e1000_82542_rev2_1: + case e1000_82543: + case e1000_82544: + case e1000_82540: + case e1000_82541: + case e1000_82541_rev_2: + legacy_pba_adjust = true; + pba = E1000_PBA_48K; + break; + case e1000_82545: + case e1000_82545_rev_3: + case e1000_82546: + case e1000_ce4100: + case e1000_82546_rev_3: + pba = E1000_PBA_48K; + break; + case e1000_82547: + case e1000_82547_rev_2: + legacy_pba_adjust = true; + pba = E1000_PBA_30K; + break; + case e1000_undefined: + case e1000_num_macs: + break; + } + + if (legacy_pba_adjust) { + if (hw->max_frame_size > E1000_RXBUFFER_8192) + pba -= 8; /* allocate more FIFO for Tx */ + + if (hw->mac_type == e1000_82547) { + adapter->tx_fifo_head = 0; + adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT; + adapter->tx_fifo_size = + (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT; + atomic_set(&adapter->tx_fifo_stall, 0); + } + } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) { + /* adjust PBA for jumbo frames */ + ew32(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 = er32(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 = (hw->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 = hw->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); + + /* PCI/PCIx hardware has PBA alignment constraints */ + switch (hw->mac_type) { + case e1000_82545 ... e1000_82546_rev_3: + pba &= ~(E1000_PBA_8K - 1); + break; + default: + break; + } + + /* if short on Rx space, Rx wins and must trump Tx + * adjustment or use Early Receive if available + */ + if (pba < min_rx_space) + pba = min_rx_space; + } + } + + ew32(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, and + * - the full Rx FIFO size minus the early receive size (for parts + * with ERT support assuming ERT set to E1000_ERT_2048), or + * - the full Rx FIFO size minus one full frame + */ + hwm = min(((pba << 10) * 9 / 10), + ((pba << 10) - hw->max_frame_size)); + + hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */ + hw->fc_low_water = hw->fc_high_water - 8; + hw->fc_pause_time = E1000_FC_PAUSE_TIME; + hw->fc_send_xon = 1; + hw->fc = hw->original_fc; + + /* Allow time for pending master requests to run */ + e1000_reset_hw(hw); + if (hw->mac_type >= e1000_82544) + ew32(WUC, 0); + + if (e1000_init_hw(hw)) + e_dev_err("Hardware Error\n"); + e1000_update_mng_vlan(adapter); + + /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */ + if (hw->mac_type >= e1000_82544 && + hw->autoneg == 1 && + hw->autoneg_advertised == ADVERTISE_1000_FULL) { + u32 ctrl = er32(CTRL); + /* clear phy power management bit if we are in gig only mode, + * which if enabled will attempt negotiation to 100Mb, which + * can cause a loss of link at power off or driver unload + */ + ctrl &= ~E1000_CTRL_SWDPIN3; + ew32(CTRL, ctrl); + } + + /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ + ew32(VET, ETHERNET_IEEE_VLAN_TYPE); + + e1000_reset_adaptive(hw); + e1000_phy_get_info(hw, &adapter->phy_info); + + e1000_release_manageability(adapter); +} + +/* Dump the eeprom for users having checksum issues */ +static void e1000_dump_eeprom(struct e1000_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct ethtool_eeprom eeprom; + const struct ethtool_ops *ops = netdev->ethtool_ops; + u8 *data; + int i; + u16 csum_old, csum_new = 0; + + eeprom.len = ops->get_eeprom_len(netdev); + eeprom.offset = 0; + + data = kmalloc(eeprom.len, GFP_KERNEL); + if (!data) + return; + + ops->get_eeprom(netdev, &eeprom, data); + + csum_old = (data[EEPROM_CHECKSUM_REG * 2]) + + (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8); + for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2) + csum_new += data[i] + (data[i + 1] << 8); + csum_new = EEPROM_SUM - csum_new; + + pr_err("/*********************/\n"); + pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old); + pr_err("Calculated : 0x%04x\n", csum_new); + + pr_err("Offset Values\n"); + pr_err("======== ======\n"); + print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0); + + pr_err("Include this output when contacting your support provider.\n"); + pr_err("This is not a software error! Something bad happened to\n"); + pr_err("your hardware or EEPROM image. Ignoring this problem could\n"); + pr_err("result in further problems, possibly loss of data,\n"); + pr_err("corruption or system hangs!\n"); + pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n"); + pr_err("which is invalid and requires you to set the proper MAC\n"); + pr_err("address manually before continuing to enable this network\n"); + pr_err("device. Please inspect the EEPROM dump and report the\n"); + pr_err("issue to your hardware vendor or Intel Customer Support.\n"); + pr_err("/*********************/\n"); + + kfree(data); +} + +/** + * e1000_is_need_ioport - determine if an adapter needs ioport resources or not + * @pdev: PCI device information struct + * + * Return true if an adapter needs ioport resources + **/ +static int e1000_is_need_ioport(struct pci_dev *pdev) +{ + switch (pdev->device) { + case E1000_DEV_ID_82540EM: + case E1000_DEV_ID_82540EM_LOM: + case E1000_DEV_ID_82540EP: + case E1000_DEV_ID_82540EP_LOM: + case E1000_DEV_ID_82540EP_LP: + case E1000_DEV_ID_82541EI: + case E1000_DEV_ID_82541EI_MOBILE: + case E1000_DEV_ID_82541ER: + case E1000_DEV_ID_82541ER_LOM: + case E1000_DEV_ID_82541GI: + case E1000_DEV_ID_82541GI_LF: + case E1000_DEV_ID_82541GI_MOBILE: + case E1000_DEV_ID_82544EI_COPPER: + case E1000_DEV_ID_82544EI_FIBER: + case E1000_DEV_ID_82544GC_COPPER: + case E1000_DEV_ID_82544GC_LOM: + case E1000_DEV_ID_82545EM_COPPER: + case E1000_DEV_ID_82545EM_FIBER: + case E1000_DEV_ID_82546EB_COPPER: + case E1000_DEV_ID_82546EB_FIBER: + case E1000_DEV_ID_82546EB_QUAD_COPPER: + return true; + default: + return false; + } +} + +static netdev_features_t e1000_fix_features(struct net_device *netdev, + netdev_features_t features) +{ + /* Since there is no support for separate Rx/Tx vlan accel + * enable/disable make sure Tx flag is always in same state as Rx. + */ + if (features & NETIF_F_HW_VLAN_CTAG_RX) + features |= NETIF_F_HW_VLAN_CTAG_TX; + else + features &= ~NETIF_F_HW_VLAN_CTAG_TX; + + return features; +} + +static int e1000_set_features(struct net_device *netdev, + netdev_features_t features) +{ + struct e1000_adapter *adapter = netdev_priv(netdev); + netdev_features_t changed = features ^ netdev->features; + + if (changed & NETIF_F_HW_VLAN_CTAG_RX) + e1000_vlan_mode(netdev, features); + + if (!(changed & (NETIF_F_RXCSUM | NETIF_F_RXALL))) + return 0; + + netdev->features = features; + adapter->rx_csum = !!(features & NETIF_F_RXCSUM); + + if (netif_running(netdev)) + e1000_reinit_locked(adapter); + else + e1000_reset(adapter); + + return 1; +} + +static const struct net_device_ops e1000_netdev_ops = { + .ndo_open = e1000_open, + .ndo_stop = e1000_close, + .ndo_start_xmit = e1000_xmit_frame, + .ndo_set_rx_mode = e1000_set_rx_mode, + .ndo_set_mac_address = e1000_set_mac, + .ndo_tx_timeout = e1000_tx_timeout, + .ndo_change_mtu = e1000_change_mtu, + .ndo_eth_ioctl = e1000_ioctl, + .ndo_validate_addr = eth_validate_addr, + .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid, + .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = e1000_netpoll, +#endif + .ndo_fix_features = e1000_fix_features, + .ndo_set_features = e1000_set_features, +}; + +/** + * e1000_init_hw_struct - initialize members of hw struct + * @adapter: board private struct + * @hw: structure used by e1000_hw.c + * + * Factors out initialization of the e1000_hw struct to its own function + * that can be called very early at init (just after struct allocation). + * Fields are initialized based on PCI device information and + * OS network device settings (MTU size). + * Returns negative error codes if MAC type setup fails. + */ +static int e1000_init_hw_struct(struct e1000_adapter *adapter, + struct e1000_hw *hw) +{ + struct pci_dev *pdev = adapter->pdev; + + /* PCI config space info */ + hw->vendor_id = pdev->vendor; + hw->device_id = pdev->device; + hw->subsystem_vendor_id = pdev->subsystem_vendor; + hw->subsystem_id = pdev->subsystem_device; + hw->revision_id = pdev->revision; + + pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word); + + hw->max_frame_size = adapter->netdev->mtu + + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; + hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE; + + /* identify the MAC */ + if (e1000_set_mac_type(hw)) { + e_err(probe, "Unknown MAC Type\n"); + return -EIO; + } + + switch (hw->mac_type) { + default: + break; + case e1000_82541: + case e1000_82547: + case e1000_82541_rev_2: + case e1000_82547_rev_2: + hw->phy_init_script = 1; + break; + } + + e1000_set_media_type(hw); + e1000_get_bus_info(hw); + + hw->wait_autoneg_complete = false; + hw->tbi_compatibility_en = true; + hw->adaptive_ifs = true; + + /* Copper options */ + + if (hw->media_type == e1000_media_type_copper) { + hw->mdix = AUTO_ALL_MODES; + hw->disable_polarity_correction = false; + hw->master_slave = E1000_MASTER_SLAVE; + } + + return 0; +} + +/** + * e1000_probe - Device Initialization Routine + * @pdev: PCI device information struct + * @ent: entry in e1000_pci_tbl + * + * Returns 0 on success, negative on failure + * + * e1000_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 e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct net_device *netdev; + struct e1000_adapter *adapter = NULL; + struct e1000_hw *hw; + + static int cards_found; + static int global_quad_port_a; /* global ksp3 port a indication */ + int i, err, pci_using_dac; + u16 eeprom_data = 0; + u16 tmp = 0; + u16 eeprom_apme_mask = E1000_EEPROM_APME; + int bars, need_ioport; + bool disable_dev = false; + + /* do not allocate ioport bars when not needed */ + need_ioport = e1000_is_need_ioport(pdev); + if (need_ioport) { + bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO); + err = pci_enable_device(pdev); + } else { + bars = pci_select_bars(pdev, IORESOURCE_MEM); + err = pci_enable_device_mem(pdev); + } + if (err) + return err; + + err = pci_request_selected_regions(pdev, bars, e1000_driver_name); + if (err) + goto err_pci_reg; + + pci_set_master(pdev); + err = pci_save_state(pdev); + if (err) + goto err_alloc_etherdev; + + err = -ENOMEM; + netdev = alloc_etherdev(sizeof(struct e1000_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; + adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); + adapter->bars = bars; + adapter->need_ioport = need_ioport; + + hw = &adapter->hw; + hw->back = adapter; + + err = -EIO; + hw->hw_addr = pci_ioremap_bar(pdev, BAR_0); + if (!hw->hw_addr) + goto err_ioremap; + + if (adapter->need_ioport) { + for (i = BAR_1; i < PCI_STD_NUM_BARS; i++) { + if (pci_resource_len(pdev, i) == 0) + continue; + if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { + hw->io_base = pci_resource_start(pdev, i); + break; + } + } + } + + /* make ready for any if (hw->...) below */ + err = e1000_init_hw_struct(adapter, hw); + if (err) + goto err_sw_init; + + /* there is a workaround being applied below that limits + * 64-bit DMA addresses to 64-bit hardware. There are some + * 32-bit adapters that Tx hang when given 64-bit DMA addresses + */ + pci_using_dac = 0; + if ((hw->bus_type == e1000_bus_type_pcix) && + !dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) { + pci_using_dac = 1; + } else { + err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + if (err) { + pr_err("No usable DMA config, aborting\n"); + goto err_dma; + } + } + + netdev->netdev_ops = &e1000_netdev_ops; + e1000_set_ethtool_ops(netdev); + netdev->watchdog_timeo = 5 * HZ; + netif_napi_add(netdev, &adapter->napi, e1000_clean); + + strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); + + adapter->bd_number = cards_found; + + /* setup the private structure */ + + err = e1000_sw_init(adapter); + if (err) + goto err_sw_init; + + err = -EIO; + if (hw->mac_type == e1000_ce4100) { + hw->ce4100_gbe_mdio_base_virt = + ioremap(pci_resource_start(pdev, BAR_1), + pci_resource_len(pdev, BAR_1)); + + if (!hw->ce4100_gbe_mdio_base_virt) + goto err_mdio_ioremap; + } + + if (hw->mac_type >= e1000_82543) { + netdev->hw_features = NETIF_F_SG | + NETIF_F_HW_CSUM | + NETIF_F_HW_VLAN_CTAG_RX; + netdev->features = NETIF_F_HW_VLAN_CTAG_TX | + NETIF_F_HW_VLAN_CTAG_FILTER; + } + + if ((hw->mac_type >= e1000_82544) && + (hw->mac_type != e1000_82547)) + netdev->hw_features |= NETIF_F_TSO; + + netdev->priv_flags |= IFF_SUPP_NOFCS; + + netdev->features |= netdev->hw_features; + netdev->hw_features |= (NETIF_F_RXCSUM | + NETIF_F_RXALL | + NETIF_F_RXFCS); + + if (pci_using_dac) { + netdev->features |= NETIF_F_HIGHDMA; + netdev->vlan_features |= NETIF_F_HIGHDMA; + } + + netdev->vlan_features |= (NETIF_F_TSO | + NETIF_F_HW_CSUM | + NETIF_F_SG); + + /* Do not set IFF_UNICAST_FLT for VMWare's 82545EM */ + if (hw->device_id != E1000_DEV_ID_82545EM_COPPER || + hw->subsystem_vendor_id != PCI_VENDOR_ID_VMWARE) + netdev->priv_flags |= IFF_UNICAST_FLT; + + /* MTU range: 46 - 16110 */ + netdev->min_mtu = ETH_ZLEN - ETH_HLEN; + netdev->max_mtu = MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN); + + adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw); + + /* initialize eeprom parameters */ + if (e1000_init_eeprom_params(hw)) { + e_err(probe, "EEPROM initialization failed\n"); + goto err_eeprom; + } + + /* before reading the EEPROM, reset the controller to + * put the device in a known good starting state + */ + + e1000_reset_hw(hw); + + /* make sure the EEPROM is good */ + if (e1000_validate_eeprom_checksum(hw) < 0) { + e_err(probe, "The EEPROM Checksum Is Not Valid\n"); + e1000_dump_eeprom(adapter); + /* set MAC address to all zeroes to invalidate and temporary + * disable this device for the user. This blocks regular + * traffic while still permitting ethtool ioctls from reaching + * the hardware as well as allowing the user to run the + * interface after manually setting a hw addr using + * `ip set address` + */ + memset(hw->mac_addr, 0, netdev->addr_len); + } else { + /* copy the MAC address out of the EEPROM */ + if (e1000_read_mac_addr(hw)) + e_err(probe, "EEPROM Read Error\n"); + } + /* don't block initialization here due to bad MAC address */ + eth_hw_addr_set(netdev, hw->mac_addr); + + if (!is_valid_ether_addr(netdev->dev_addr)) + e_err(probe, "Invalid MAC Address\n"); + + + INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog); + INIT_DELAYED_WORK(&adapter->fifo_stall_task, + e1000_82547_tx_fifo_stall_task); + INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task); + INIT_WORK(&adapter->reset_task, e1000_reset_task); + + e1000_check_options(adapter); + + /* Initial Wake on LAN setting + * If APM wake is enabled in the EEPROM, + * enable the ACPI Magic Packet filter + */ + + switch (hw->mac_type) { + case e1000_82542_rev2_0: + case e1000_82542_rev2_1: + case e1000_82543: + break; + case e1000_82544: + e1000_read_eeprom(hw, + EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data); + eeprom_apme_mask = E1000_EEPROM_82544_APM; + break; + case e1000_82546: + case e1000_82546_rev_3: + if (er32(STATUS) & E1000_STATUS_FUNC_1) { + e1000_read_eeprom(hw, + EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data); + break; + } + fallthrough; + default: + e1000_read_eeprom(hw, + EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data); + break; + } + 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_82546GB_PCIE: + adapter->eeprom_wol = 0; + break; + case E1000_DEV_ID_82546EB_FIBER: + case E1000_DEV_ID_82546GB_FIBER: + /* Wake events only supported on port A for dual fiber + * regardless of eeprom setting + */ + if (er32(STATUS) & E1000_STATUS_FUNC_1) + adapter->eeprom_wol = 0; + break; + case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3: + /* if quad port adapter, disable WoL on all but port A */ + if (global_quad_port_a != 0) + adapter->eeprom_wol = 0; + else + adapter->quad_port_a = true; + /* Reset for multiple quad port adapters */ + if (++global_quad_port_a == 4) + global_quad_port_a = 0; + break; + } + + /* initialize the wol settings based on the eeprom settings */ + adapter->wol = adapter->eeprom_wol; + device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol); + + /* Auto detect PHY address */ + if (hw->mac_type == e1000_ce4100) { + for (i = 0; i < 32; i++) { + hw->phy_addr = i; + e1000_read_phy_reg(hw, PHY_ID2, &tmp); + + if (tmp != 0 && tmp != 0xFF) + break; + } + + if (i >= 32) + goto err_eeprom; + } + + /* reset the hardware with the new settings */ + e1000_reset(adapter); + + strcpy(netdev->name, "eth%d"); + err = register_netdev(netdev); + if (err) + goto err_register; + + e1000_vlan_filter_on_off(adapter, false); + + /* print bus type/speed/width info */ + e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n", + ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""), + ((hw->bus_speed == e1000_bus_speed_133) ? 133 : + (hw->bus_speed == e1000_bus_speed_120) ? 120 : + (hw->bus_speed == e1000_bus_speed_100) ? 100 : + (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33), + ((hw->bus_width == e1000_bus_width_64) ? 64 : 32), + netdev->dev_addr); + + /* carrier off reporting is important to ethtool even BEFORE open */ + netif_carrier_off(netdev); + + e_info(probe, "Intel(R) PRO/1000 Network Connection\n"); + + cards_found++; + return 0; + +err_register: +err_eeprom: + e1000_phy_hw_reset(hw); + + if (hw->flash_address) + iounmap(hw->flash_address); + kfree(adapter->tx_ring); + kfree(adapter->rx_ring); +err_dma: +err_sw_init: +err_mdio_ioremap: + iounmap(hw->ce4100_gbe_mdio_base_virt); + iounmap(hw->hw_addr); +err_ioremap: + disable_dev = !test_and_set_bit(__E1000_DISABLED, &adapter->flags); + free_netdev(netdev); +err_alloc_etherdev: + pci_release_selected_regions(pdev, bars); +err_pci_reg: + if (!adapter || disable_dev) + pci_disable_device(pdev); + return err; +} + +/** + * e1000_remove - Device Removal Routine + * @pdev: PCI device information struct + * + * e1000_remove is called by the PCI subsystem to alert the driver + * that it should release a PCI device. That could be caused by a + * Hot-Plug event, or because the driver is going to be removed from + * memory. + **/ +static void e1000_remove(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct e1000_adapter *adapter = netdev_priv(netdev); + struct e1000_hw *hw = &adapter->hw; + bool disable_dev; + + e1000_down_and_stop(adapter); + e1000_release_manageability(adapter); + + unregister_netdev(netdev); + + e1000_phy_hw_reset(hw); + + kfree(adapter->tx_ring); + kfree(adapter->rx_ring); + + if (hw->mac_type == e1000_ce4100) + iounmap(hw->ce4100_gbe_mdio_base_virt); + iounmap(hw->hw_addr); + if (hw->flash_address) + iounmap(hw->flash_address); + pci_release_selected_regions(pdev, adapter->bars); + + disable_dev = !test_and_set_bit(__E1000_DISABLED, &adapter->flags); + free_netdev(netdev); + + if (disable_dev) + pci_disable_device(pdev); +} + +/** + * e1000_sw_init - Initialize general software structures (struct e1000_adapter) + * @adapter: board private structure to initialize + * + * e1000_sw_init initializes the Adapter private data structure. + * e1000_init_hw_struct MUST be called before this function + **/ +static int e1000_sw_init(struct e1000_adapter *adapter) +{ + adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; + + adapter->num_tx_queues = 1; + adapter->num_rx_queues = 1; + + if (e1000_alloc_queues(adapter)) { + e_err(probe, "Unable to allocate memory for queues\n"); + return -ENOMEM; + } + + /* Explicitly disable IRQ since the NIC can be in any state. */ + e1000_irq_disable(adapter); + + spin_lock_init(&adapter->stats_lock); + + set_bit(__E1000_DOWN, &adapter->flags); + + return 0; +} + +/** + * e1000_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 e1000_alloc_queues(struct e1000_adapter *adapter) +{ + adapter->tx_ring = kcalloc(adapter->num_tx_queues, + sizeof(struct e1000_tx_ring), GFP_KERNEL); + if (!adapter->tx_ring) + return -ENOMEM; + + adapter->rx_ring = kcalloc(adapter->num_rx_queues, + sizeof(struct e1000_rx_ring), GFP_KERNEL); + if (!adapter->rx_ring) { + kfree(adapter->tx_ring); + return -ENOMEM; + } + + return E1000_SUCCESS; +} + +/** + * e1000_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 task is started, + * and the stack is notified that the interface is ready. + **/ +int e1000_open(struct net_device *netdev) +{ + struct e1000_adapter *adapter = netdev_priv(netdev); + struct e1000_hw *hw = &adapter->hw; + int err; + + /* disallow open during test */ + if (test_bit(__E1000_TESTING, &adapter->flags)) + return -EBUSY; + + netif_carrier_off(netdev); + + /* allocate transmit descriptors */ + err = e1000_setup_all_tx_resources(adapter); + if (err) + goto err_setup_tx; + + /* allocate receive descriptors */ + err = e1000_setup_all_rx_resources(adapter); + if (err) + goto err_setup_rx; + + e1000_power_up_phy(adapter); + + adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; + if ((hw->mng_cookie.status & + E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) { + e1000_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. + */ + e1000_configure(adapter); + + err = e1000_request_irq(adapter); + if (err) + goto err_req_irq; + + /* From here on the code is the same as e1000_up() */ + clear_bit(__E1000_DOWN, &adapter->flags); + + napi_enable(&adapter->napi); + + e1000_irq_enable(adapter); + + netif_start_queue(netdev); + + /* fire a link status change interrupt to start the watchdog */ + ew32(ICS, E1000_ICS_LSC); + + return E1000_SUCCESS; + +err_req_irq: + e1000_power_down_phy(adapter); + e1000_free_all_rx_resources(adapter); +err_setup_rx: + e1000_free_all_tx_resources(adapter); +err_setup_tx: + e1000_reset(adapter); + + return err; +} + +/** + * e1000_close - Disables a network interface + * @netdev: network interface device structure + * + * Returns 0, this is not allowed to fail + * + * The close entry point is called when an interface is de-activated + * by the OS. The hardware is still under the drivers control, but + * needs to be disabled. A global MAC reset is issued to stop the + * hardware, and all transmit and receive resources are freed. + **/ +int e1000_close(struct net_device *netdev) +{ + struct e1000_adapter *adapter = netdev_priv(netdev); + struct e1000_hw *hw = &adapter->hw; + int count = E1000_CHECK_RESET_COUNT; + + while (test_and_set_bit(__E1000_RESETTING, &adapter->flags) && count--) + usleep_range(10000, 20000); + + WARN_ON(count < 0); + + /* signal that we're down so that the reset task will no longer run */ + set_bit(__E1000_DOWN, &adapter->flags); + clear_bit(__E1000_RESETTING, &adapter->flags); + + e1000_down(adapter); + e1000_power_down_phy(adapter); + e1000_free_irq(adapter); + + e1000_free_all_tx_resources(adapter); + e1000_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 ((hw->mng_cookie.status & + E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) && + !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) { + e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), + adapter->mng_vlan_id); + } + + return 0; +} + +/** + * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary + * @adapter: address of board private structure + * @start: address of beginning of memory + * @len: length of memory + **/ +static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start, + unsigned long len) +{ + struct e1000_hw *hw = &adapter->hw; + unsigned long begin = (unsigned long)start; + unsigned long end = begin + len; + + /* First rev 82545 and 82546 need to not allow any memory + * write location to cross 64k boundary due to errata 23 + */ + if (hw->mac_type == e1000_82545 || + hw->mac_type == e1000_ce4100 || + hw->mac_type == e1000_82546) { + return ((begin ^ (end - 1)) >> 16) == 0; + } + + return true; +} + +/** + * e1000_setup_tx_resources - allocate Tx resources (Descriptors) + * @adapter: board private structure + * @txdr: tx descriptor ring (for a specific queue) to setup + * + * Return 0 on success, negative on failure + **/ +static int e1000_setup_tx_resources(struct e1000_adapter *adapter, + struct e1000_tx_ring *txdr) +{ + struct pci_dev *pdev = adapter->pdev; + int size; + + size = sizeof(struct e1000_tx_buffer) * txdr->count; + txdr->buffer_info = vzalloc(size); + if (!txdr->buffer_info) + return -ENOMEM; + + /* round up to nearest 4K */ + + txdr->size = txdr->count * sizeof(struct e1000_tx_desc); + txdr->size = ALIGN(txdr->size, 4096); + + txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma, + GFP_KERNEL); + if (!txdr->desc) { +setup_tx_desc_die: + vfree(txdr->buffer_info); + return -ENOMEM; + } + + /* Fix for errata 23, can't cross 64kB boundary */ + if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) { + void *olddesc = txdr->desc; + dma_addr_t olddma = txdr->dma; + e_err(tx_err, "txdr align check failed: %u bytes at %p\n", + txdr->size, txdr->desc); + /* Try again, without freeing the previous */ + txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, + &txdr->dma, GFP_KERNEL); + /* Failed allocation, critical failure */ + if (!txdr->desc) { + dma_free_coherent(&pdev->dev, txdr->size, olddesc, + olddma); + goto setup_tx_desc_die; + } + + if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) { + /* give up */ + dma_free_coherent(&pdev->dev, txdr->size, txdr->desc, + txdr->dma); + dma_free_coherent(&pdev->dev, txdr->size, olddesc, + olddma); + e_err(probe, "Unable to allocate aligned memory " + "for the transmit descriptor ring\n"); + vfree(txdr->buffer_info); + return -ENOMEM; + } else { + /* Free old allocation, new allocation was successful */ + dma_free_coherent(&pdev->dev, txdr->size, olddesc, + olddma); + } + } + memset(txdr->desc, 0, txdr->size); + + txdr->next_to_use = 0; + txdr->next_to_clean = 0; + + return 0; +} + +/** + * e1000_setup_all_tx_resources - wrapper to allocate Tx resources + * (Descriptors) for all queues + * @adapter: board private structure + * + * Return 0 on success, negative on failure + **/ +int e1000_setup_all_tx_resources(struct e1000_adapter *adapter) +{ + int i, err = 0; + + for (i = 0; i < adapter->num_tx_queues; i++) { + err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]); + if (err) { + e_err(probe, "Allocation for Tx Queue %u failed\n", i); + for (i-- ; i >= 0; i--) + e1000_free_tx_resources(adapter, + &adapter->tx_ring[i]); + break; + } + } + + return err; +} + +/** + * e1000_configure_tx - Configure 8254x Transmit Unit after Reset + * @adapter: board private structure + * + * Configure the Tx unit of the MAC after a reset. + **/ +static void e1000_configure_tx(struct e1000_adapter *adapter) +{ + u64 tdba; + struct e1000_hw *hw = &adapter->hw; + u32 tdlen, tctl, tipg; + u32 ipgr1, ipgr2; + + /* Setup the HW Tx Head and Tail descriptor pointers */ + + switch (adapter->num_tx_queues) { + case 1: + default: + tdba = adapter->tx_ring[0].dma; + tdlen = adapter->tx_ring[0].count * + sizeof(struct e1000_tx_desc); + ew32(TDLEN, tdlen); + ew32(TDBAH, (tdba >> 32)); + ew32(TDBAL, (tdba & 0x00000000ffffffffULL)); + ew32(TDT, 0); + ew32(TDH, 0); + adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? + E1000_TDH : E1000_82542_TDH); + adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? + E1000_TDT : E1000_82542_TDT); + break; + } + + /* Set the default values for the Tx Inter Packet Gap timer */ + if ((hw->media_type == e1000_media_type_fiber || + hw->media_type == e1000_media_type_internal_serdes)) + tipg = DEFAULT_82543_TIPG_IPGT_FIBER; + else + tipg = DEFAULT_82543_TIPG_IPGT_COPPER; + + switch (hw->mac_type) { + case e1000_82542_rev2_0: + case e1000_82542_rev2_1: + tipg = DEFAULT_82542_TIPG_IPGT; + ipgr1 = DEFAULT_82542_TIPG_IPGR1; + ipgr2 = DEFAULT_82542_TIPG_IPGR2; + break; + default: + ipgr1 = DEFAULT_82543_TIPG_IPGR1; + ipgr2 = DEFAULT_82543_TIPG_IPGR2; + break; + } + tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT; + tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT; + ew32(TIPG, tipg); + + /* Set the Tx Interrupt Delay register */ + + ew32(TIDV, adapter->tx_int_delay); + if (hw->mac_type >= e1000_82540) + ew32(TADV, adapter->tx_abs_int_delay); + + /* Program the Transmit Control Register */ + + tctl = er32(TCTL); + tctl &= ~E1000_TCTL_CT; + tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC | + (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT); + + e1000_config_collision_dist(hw); + + /* Setup Transmit Descriptor Settings for eop descriptor */ + adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS; + + /* only set IDE if we are delaying interrupts using the timers */ + if (adapter->tx_int_delay) + adapter->txd_cmd |= E1000_TXD_CMD_IDE; + + if (hw->mac_type < e1000_82543) + adapter->txd_cmd |= E1000_TXD_CMD_RPS; + else + adapter->txd_cmd |= E1000_TXD_CMD_RS; + + /* Cache if we're 82544 running in PCI-X because we'll + * need this to apply a workaround later in the send path. + */ + if (hw->mac_type == e1000_82544 && + hw->bus_type == e1000_bus_type_pcix) + adapter->pcix_82544 = true; + + ew32(TCTL, tctl); + +} + +/** + * e1000_setup_rx_resources - allocate Rx resources (Descriptors) + * @adapter: board private structure + * @rxdr: rx descriptor ring (for a specific queue) to setup + * + * Returns 0 on success, negative on failure + **/ +static int e1000_setup_rx_resources(struct e1000_adapter *adapter, + struct e1000_rx_ring *rxdr) +{ + struct pci_dev *pdev = adapter->pdev; + int size, desc_len; + + size = sizeof(struct e1000_rx_buffer) * rxdr->count; + rxdr->buffer_info = vzalloc(size); + if (!rxdr->buffer_info) + return -ENOMEM; + + desc_len = sizeof(struct e1000_rx_desc); + + /* Round up to nearest 4K */ + + rxdr->size = rxdr->count * desc_len; + rxdr->size = ALIGN(rxdr->size, 4096); + + rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma, + GFP_KERNEL); + if (!rxdr->desc) { +setup_rx_desc_die: + vfree(rxdr->buffer_info); + return -ENOMEM; + } + + /* Fix for errata 23, can't cross 64kB boundary */ + if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) { + void *olddesc = rxdr->desc; + dma_addr_t olddma = rxdr->dma; + e_err(rx_err, "rxdr align check failed: %u bytes at %p\n", + rxdr->size, rxdr->desc); + /* Try again, without freeing the previous */ + rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, + &rxdr->dma, GFP_KERNEL); + /* Failed allocation, critical failure */ + if (!rxdr->desc) { + dma_free_coherent(&pdev->dev, rxdr->size, olddesc, + olddma); + goto setup_rx_desc_die; + } + + if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) { + /* give up */ + dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc, + rxdr->dma); + dma_free_coherent(&pdev->dev, rxdr->size, olddesc, + olddma); + e_err(probe, "Unable to allocate aligned memory for " + "the Rx descriptor ring\n"); + goto setup_rx_desc_die; + } else { + /* Free old allocation, new allocation was successful */ + dma_free_coherent(&pdev->dev, rxdr->size, olddesc, + olddma); + } + } + memset(rxdr->desc, 0, rxdr->size); + + rxdr->next_to_clean = 0; + rxdr->next_to_use = 0; + rxdr->rx_skb_top = NULL; + + return 0; +} + +/** + * e1000_setup_all_rx_resources - wrapper to allocate Rx resources + * (Descriptors) for all queues + * @adapter: board private structure + * + * Return 0 on success, negative on failure + **/ +int e1000_setup_all_rx_resources(struct e1000_adapter *adapter) +{ + int i, err = 0; + + for (i = 0; i < adapter->num_rx_queues; i++) { + err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]); + if (err) { + e_err(probe, "Allocation for Rx Queue %u failed\n", i); + for (i-- ; i >= 0; i--) + e1000_free_rx_resources(adapter, + &adapter->rx_ring[i]); + break; + } + } + + return err; +} + +/** + * e1000_setup_rctl - configure the receive control registers + * @adapter: Board private structure + **/ +static void e1000_setup_rctl(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + u32 rctl; + + rctl = er32(RCTL); + + rctl &= ~(3 << E1000_RCTL_MO_SHIFT); + + rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO | + E1000_RCTL_RDMTS_HALF | + (hw->mc_filter_type << E1000_RCTL_MO_SHIFT); + + if (hw->tbi_compatibility_on == 1) + rctl |= E1000_RCTL_SBP; + else + rctl &= ~E1000_RCTL_SBP; + + if (adapter->netdev->mtu <= ETH_DATA_LEN) + rctl &= ~E1000_RCTL_LPE; + else + rctl |= E1000_RCTL_LPE; + + /* Setup buffer sizes */ + rctl &= ~E1000_RCTL_SZ_4096; + rctl |= E1000_RCTL_BSEX; + switch (adapter->rx_buffer_len) { + case E1000_RXBUFFER_2048: + default: + rctl |= E1000_RCTL_SZ_2048; + rctl &= ~E1000_RCTL_BSEX; + break; + case E1000_RXBUFFER_4096: + rctl |= E1000_RCTL_SZ_4096; + break; + case E1000_RXBUFFER_8192: + rctl |= E1000_RCTL_SZ_8192; + break; + case E1000_RXBUFFER_16384: + rctl |= E1000_RCTL_SZ_16384; + break; + } + + /* This is useful for sniffing bad packets. */ + if (adapter->netdev->features & NETIF_F_RXALL) { + /* UPE and MPE will be handled by normal PROMISC logic + * in e1000e_set_rx_mode + */ + rctl |= (E1000_RCTL_SBP | /* Receive bad packets */ + E1000_RCTL_BAM | /* RX All Bcast Pkts */ + E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */ + + rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */ + E1000_RCTL_DPF | /* Allow filtered pause */ + E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */ + /* Do not mess with E1000_CTRL_VME, it affects transmit as well, + * and that breaks VLANs. + */ + } + + ew32(RCTL, rctl); +} + +/** + * e1000_configure_rx - Configure 8254x Receive Unit after Reset + * @adapter: board private structure + * + * Configure the Rx unit of the MAC after a reset. + **/ +static void e1000_configure_rx(struct e1000_adapter *adapter) +{ + u64 rdba; + struct e1000_hw *hw = &adapter->hw; + u32 rdlen, rctl, rxcsum; + + if (adapter->netdev->mtu > ETH_DATA_LEN) { + rdlen = adapter->rx_ring[0].count * + sizeof(struct e1000_rx_desc); + adapter->clean_rx = e1000_clean_jumbo_rx_irq; + adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers; + } else { + rdlen = adapter->rx_ring[0].count * + sizeof(struct e1000_rx_desc); + adapter->clean_rx = e1000_clean_rx_irq; + adapter->alloc_rx_buf = e1000_alloc_rx_buffers; + } + + /* disable receives while setting up the descriptors */ + rctl = er32(RCTL); + ew32(RCTL, rctl & ~E1000_RCTL_EN); + + /* set the Receive Delay Timer Register */ + ew32(RDTR, adapter->rx_int_delay); + + if (hw->mac_type >= e1000_82540) { + ew32(RADV, adapter->rx_abs_int_delay); + if (adapter->itr_setting != 0) + ew32(ITR, 1000000000 / (adapter->itr * 256)); + } + + /* Setup the HW Rx Head and Tail Descriptor Pointers and + * the Base and Length of the Rx Descriptor Ring + */ + switch (adapter->num_rx_queues) { + case 1: + default: + rdba = adapter->rx_ring[0].dma; + ew32(RDLEN, rdlen); + ew32(RDBAH, (rdba >> 32)); + ew32(RDBAL, (rdba & 0x00000000ffffffffULL)); + ew32(RDT, 0); + ew32(RDH, 0); + adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? + E1000_RDH : E1000_82542_RDH); + adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? + E1000_RDT : E1000_82542_RDT); + break; + } + + /* Enable 82543 Receive Checksum Offload for TCP and UDP */ + if (hw->mac_type >= e1000_82543) { + rxcsum = er32(RXCSUM); + if (adapter->rx_csum) + rxcsum |= E1000_RXCSUM_TUOFL; + else + /* don't need to clear IPPCSE as it defaults to 0 */ + rxcsum &= ~E1000_RXCSUM_TUOFL; + ew32(RXCSUM, rxcsum); + } + + /* Enable Receives */ + ew32(RCTL, rctl | E1000_RCTL_EN); +} + +/** + * e1000_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 e1000_free_tx_resources(struct e1000_adapter *adapter, + struct e1000_tx_ring *tx_ring) +{ + struct pci_dev *pdev = adapter->pdev; + + e1000_clean_tx_ring(adapter, tx_ring); + + vfree(tx_ring->buffer_info); + tx_ring->buffer_info = NULL; + + dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, + tx_ring->dma); + + tx_ring->desc = NULL; +} + +/** + * e1000_free_all_tx_resources - Free Tx Resources for All Queues + * @adapter: board private structure + * + * Free all transmit software resources + **/ +void e1000_free_all_tx_resources(struct e1000_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_tx_queues; i++) + e1000_free_tx_resources(adapter, &adapter->tx_ring[i]); +} + +static void +e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter, + struct e1000_tx_buffer *buffer_info, + int budget) +{ + if (buffer_info->dma) { + if (buffer_info->mapped_as_page) + dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, + buffer_info->length, DMA_TO_DEVICE); + else + dma_unmap_single(&adapter->pdev->dev, buffer_info->dma, + buffer_info->length, + DMA_TO_DEVICE); + buffer_info->dma = 0; + } + if (buffer_info->skb) { + napi_consume_skb(buffer_info->skb, budget); + buffer_info->skb = NULL; + } + buffer_info->time_stamp = 0; + /* buffer_info must be completely set up in the transmit path */ +} + +/** + * e1000_clean_tx_ring - Free Tx Buffers + * @adapter: board private structure + * @tx_ring: ring to be cleaned + **/ +static void e1000_clean_tx_ring(struct e1000_adapter *adapter, + struct e1000_tx_ring *tx_ring) +{ + struct e1000_hw *hw = &adapter->hw; + struct e1000_tx_buffer *buffer_info; + unsigned long size; + unsigned int i; + + /* Free all the Tx ring sk_buffs */ + + for (i = 0; i < tx_ring->count; i++) { + buffer_info = &tx_ring->buffer_info[i]; + e1000_unmap_and_free_tx_resource(adapter, buffer_info, 0); + } + + netdev_reset_queue(adapter->netdev); + size = sizeof(struct e1000_tx_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; + tx_ring->last_tx_tso = false; + + writel(0, hw->hw_addr + tx_ring->tdh); + writel(0, hw->hw_addr + tx_ring->tdt); +} + +/** + * e1000_clean_all_tx_rings - Free Tx Buffers for all queues + * @adapter: board private structure + **/ +static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_tx_queues; i++) + e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]); +} + +/** + * e1000_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 e1000_free_rx_resources(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring) +{ + struct pci_dev *pdev = adapter->pdev; + + e1000_clean_rx_ring(adapter, rx_ring); + + vfree(rx_ring->buffer_info); + rx_ring->buffer_info = NULL; + + dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, + rx_ring->dma); + + rx_ring->desc = NULL; +} + +/** + * e1000_free_all_rx_resources - Free Rx Resources for All Queues + * @adapter: board private structure + * + * Free all receive software resources + **/ +void e1000_free_all_rx_resources(struct e1000_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_rx_queues; i++) + e1000_free_rx_resources(adapter, &adapter->rx_ring[i]); +} + +#define E1000_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN) +static unsigned int e1000_frag_len(const struct e1000_adapter *a) +{ + return SKB_DATA_ALIGN(a->rx_buffer_len + E1000_HEADROOM) + + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); +} + +static void *e1000_alloc_frag(const struct e1000_adapter *a) +{ + unsigned int len = e1000_frag_len(a); + u8 *data = netdev_alloc_frag(len); + + if (likely(data)) + data += E1000_HEADROOM; + return data; +} + +/** + * e1000_clean_rx_ring - Free Rx Buffers per Queue + * @adapter: board private structure + * @rx_ring: ring to free buffers from + **/ +static void e1000_clean_rx_ring(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring) +{ + struct e1000_hw *hw = &adapter->hw; + struct e1000_rx_buffer *buffer_info; + struct pci_dev *pdev = adapter->pdev; + unsigned long size; + unsigned int i; + + /* Free all the Rx netfrags */ + for (i = 0; i < rx_ring->count; i++) { + buffer_info = &rx_ring->buffer_info[i]; + if (adapter->clean_rx == e1000_clean_rx_irq) { + if (buffer_info->dma) + dma_unmap_single(&pdev->dev, buffer_info->dma, + adapter->rx_buffer_len, + DMA_FROM_DEVICE); + if (buffer_info->rxbuf.data) { + skb_free_frag(buffer_info->rxbuf.data); + buffer_info->rxbuf.data = NULL; + } + } else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq) { + if (buffer_info->dma) + dma_unmap_page(&pdev->dev, buffer_info->dma, + adapter->rx_buffer_len, + DMA_FROM_DEVICE); + if (buffer_info->rxbuf.page) { + put_page(buffer_info->rxbuf.page); + buffer_info->rxbuf.page = NULL; + } + } + + buffer_info->dma = 0; + } + + /* there also may be some cached data from a chained receive */ + napi_free_frags(&adapter->napi); + rx_ring->rx_skb_top = NULL; + + size = sizeof(struct e1000_rx_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, hw->hw_addr + rx_ring->rdh); + writel(0, hw->hw_addr + rx_ring->rdt); +} + +/** + * e1000_clean_all_rx_rings - Free Rx Buffers for all queues + * @adapter: board private structure + **/ +static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_rx_queues; i++) + e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]); +} + +/* The 82542 2.0 (revision 2) needs to have the receive unit in reset + * and memory write and invalidate disabled for certain operations + */ +static void e1000_enter_82542_rst(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + struct net_device *netdev = adapter->netdev; + u32 rctl; + + e1000_pci_clear_mwi(hw); + + rctl = er32(RCTL); + rctl |= E1000_RCTL_RST; + ew32(RCTL, rctl); + E1000_WRITE_FLUSH(); + mdelay(5); + + if (netif_running(netdev)) + e1000_clean_all_rx_rings(adapter); +} + +static void e1000_leave_82542_rst(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + struct net_device *netdev = adapter->netdev; + u32 rctl; + + rctl = er32(RCTL); + rctl &= ~E1000_RCTL_RST; + ew32(RCTL, rctl); + E1000_WRITE_FLUSH(); + mdelay(5); + + if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE) + e1000_pci_set_mwi(hw); + + if (netif_running(netdev)) { + /* No need to loop, because 82542 supports only 1 queue */ + struct e1000_rx_ring *ring = &adapter->rx_ring[0]; + e1000_configure_rx(adapter); + adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring)); + } +} + +/** + * e1000_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 e1000_set_mac(struct net_device *netdev, void *p) +{ + struct e1000_adapter *adapter = netdev_priv(netdev); + struct e1000_hw *hw = &adapter->hw; + struct sockaddr *addr = p; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + + /* 82542 2.0 needs to be in reset to write receive address registers */ + + if (hw->mac_type == e1000_82542_rev2_0) + e1000_enter_82542_rst(adapter); + + eth_hw_addr_set(netdev, addr->sa_data); + memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len); + + e1000_rar_set(hw, hw->mac_addr, 0); + + if (hw->mac_type == e1000_82542_rev2_0) + e1000_leave_82542_rst(adapter); + + return 0; +} + +/** + * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set + * @netdev: network interface device structure + * + * The set_rx_mode entry point is called whenever the unicast or multicast + * address lists or the network interface flags are updated. This routine is + * responsible for configuring the hardware for proper unicast, multicast, + * promiscuous mode, and all-multi behavior. + **/ +static void e1000_set_rx_mode(struct net_device *netdev) +{ + struct e1000_adapter *adapter = netdev_priv(netdev); + struct e1000_hw *hw = &adapter->hw; + struct netdev_hw_addr *ha; + bool use_uc = false; + u32 rctl; + u32 hash_value; + int i, rar_entries = E1000_RAR_ENTRIES; + int mta_reg_count = E1000_NUM_MTA_REGISTERS; + u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC); + + if (!mcarray) + return; + + /* Check for Promiscuous and All Multicast modes */ + + rctl = er32(RCTL); + + if (netdev->flags & IFF_PROMISC) { + rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE); + rctl &= ~E1000_RCTL_VFE; + } else { + if (netdev->flags & IFF_ALLMULTI) + rctl |= E1000_RCTL_MPE; + else + rctl &= ~E1000_RCTL_MPE; + /* Enable VLAN filter if there is a VLAN */ + if (e1000_vlan_used(adapter)) + rctl |= E1000_RCTL_VFE; + } + + if (netdev_uc_count(netdev) > rar_entries - 1) { + rctl |= E1000_RCTL_UPE; + } else if (!(netdev->flags & IFF_PROMISC)) { + rctl &= ~E1000_RCTL_UPE; + use_uc = true; + } + + ew32(RCTL, rctl); + + /* 82542 2.0 needs to be in reset to write receive address registers */ + + if (hw->mac_type == e1000_82542_rev2_0) + e1000_enter_82542_rst(adapter); + + /* load the first 14 addresses into the exact filters 1-14. Unicast + * addresses take precedence to avoid disabling unicast filtering + * when possible. + * + * RAR 0 is used for the station MAC address + * if there are not 14 addresses, go ahead and clear the filters + */ + i = 1; + if (use_uc) + netdev_for_each_uc_addr(ha, netdev) { + if (i == rar_entries) + break; + e1000_rar_set(hw, ha->addr, i++); + } + + netdev_for_each_mc_addr(ha, netdev) { + if (i == rar_entries) { + /* load any remaining addresses into the hash table */ + u32 hash_reg, hash_bit, mta; + hash_value = e1000_hash_mc_addr(hw, ha->addr); + hash_reg = (hash_value >> 5) & 0x7F; + hash_bit = hash_value & 0x1F; + mta = (1 << hash_bit); + mcarray[hash_reg] |= mta; + } else { + e1000_rar_set(hw, ha->addr, i++); + } + } + + for (; i < rar_entries; i++) { + E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0); + E1000_WRITE_FLUSH(); + E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0); + E1000_WRITE_FLUSH(); + } + + /* write the hash table completely, write from bottom to avoid + * both stupid write combining chipsets, and flushing each write + */ + for (i = mta_reg_count - 1; i >= 0 ; i--) { + /* If we are on an 82544 has an errata where writing odd + * offsets overwrites the previous even offset, but writing + * backwards over the range solves the issue by always + * writing the odd offset first + */ + E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]); + } + E1000_WRITE_FLUSH(); + + if (hw->mac_type == e1000_82542_rev2_0) + e1000_leave_82542_rst(adapter); + + kfree(mcarray); +} + +/** + * e1000_update_phy_info_task - get phy info + * @work: work struct contained inside adapter struct + * + * Need to wait a few seconds after link up to get diagnostic information from + * the phy + */ +static void e1000_update_phy_info_task(struct work_struct *work) +{ + struct e1000_adapter *adapter = container_of(work, + struct e1000_adapter, + phy_info_task.work); + + e1000_phy_get_info(&adapter->hw, &adapter->phy_info); +} + +/** + * e1000_82547_tx_fifo_stall_task - task to complete work + * @work: work struct contained inside adapter struct + **/ +static void e1000_82547_tx_fifo_stall_task(struct work_struct *work) +{ + struct e1000_adapter *adapter = container_of(work, + struct e1000_adapter, + fifo_stall_task.work); + struct e1000_hw *hw = &adapter->hw; + struct net_device *netdev = adapter->netdev; + u32 tctl; + + if (atomic_read(&adapter->tx_fifo_stall)) { + if ((er32(TDT) == er32(TDH)) && + (er32(TDFT) == er32(TDFH)) && + (er32(TDFTS) == er32(TDFHS))) { + tctl = er32(TCTL); + ew32(TCTL, tctl & ~E1000_TCTL_EN); + ew32(TDFT, adapter->tx_head_addr); + ew32(TDFH, adapter->tx_head_addr); + ew32(TDFTS, adapter->tx_head_addr); + ew32(TDFHS, adapter->tx_head_addr); + ew32(TCTL, tctl); + E1000_WRITE_FLUSH(); + + adapter->tx_fifo_head = 0; + atomic_set(&adapter->tx_fifo_stall, 0); + netif_wake_queue(netdev); + } else if (!test_bit(__E1000_DOWN, &adapter->flags)) { + schedule_delayed_work(&adapter->fifo_stall_task, 1); + } + } +} + +bool e1000_has_link(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + bool link_active = false; + + /* get_link_status is set on LSC (link status) interrupt or rx + * sequence error interrupt (except on intel ce4100). + * get_link_status will stay false until the + * e1000_check_for_link establishes link for copper adapters + * ONLY + */ + switch (hw->media_type) { + case e1000_media_type_copper: + if (hw->mac_type == e1000_ce4100) + hw->get_link_status = 1; + if (hw->get_link_status) { + e1000_check_for_link(hw); + link_active = !hw->get_link_status; + } else { + link_active = true; + } + break; + case e1000_media_type_fiber: + e1000_check_for_link(hw); + link_active = !!(er32(STATUS) & E1000_STATUS_LU); + break; + case e1000_media_type_internal_serdes: + e1000_check_for_link(hw); + link_active = hw->serdes_has_link; + break; + default: + break; + } + + return link_active; +} + +/** + * e1000_watchdog - work function + * @work: work struct contained inside adapter struct + **/ +static void e1000_watchdog(struct work_struct *work) +{ + struct e1000_adapter *adapter = container_of(work, + struct e1000_adapter, + watchdog_task.work); + struct e1000_hw *hw = &adapter->hw; + struct net_device *netdev = adapter->netdev; + struct e1000_tx_ring *txdr = adapter->tx_ring; + u32 link, tctl; + + link = e1000_has_link(adapter); + if ((netif_carrier_ok(netdev)) && link) + goto link_up; + + if (link) { + if (!netif_carrier_ok(netdev)) { + u32 ctrl; + /* update snapshot of PHY registers on LSC */ + e1000_get_speed_and_duplex(hw, + &adapter->link_speed, + &adapter->link_duplex); + + ctrl = er32(CTRL); + pr_info("%s NIC Link is Up %d Mbps %s, " + "Flow Control: %s\n", + netdev->name, + 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"))); + + /* adjust timeout factor according to speed/duplex */ + adapter->tx_timeout_factor = 1; + switch (adapter->link_speed) { + case SPEED_10: + adapter->tx_timeout_factor = 16; + break; + case SPEED_100: + /* maybe add some timeout factor ? */ + break; + } + + /* enable transmits in the hardware */ + tctl = er32(TCTL); + tctl |= E1000_TCTL_EN; + ew32(TCTL, tctl); + + netif_carrier_on(netdev); + if (!test_bit(__E1000_DOWN, &adapter->flags)) + schedule_delayed_work(&adapter->phy_info_task, + 2 * HZ); + adapter->smartspeed = 0; + } + } else { + if (netif_carrier_ok(netdev)) { + adapter->link_speed = 0; + adapter->link_duplex = 0; + pr_info("%s NIC Link is Down\n", + netdev->name); + netif_carrier_off(netdev); + + if (!test_bit(__E1000_DOWN, &adapter->flags)) + schedule_delayed_work(&adapter->phy_info_task, + 2 * HZ); + } + + e1000_smartspeed(adapter); + } + +link_up: + e1000_update_stats(adapter); + + hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old; + adapter->tpt_old = adapter->stats.tpt; + hw->collision_delta = adapter->stats.colc - adapter->colc_old; + adapter->colc_old = adapter->stats.colc; + + adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old; + adapter->gorcl_old = adapter->stats.gorcl; + adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old; + adapter->gotcl_old = adapter->stats.gotcl; + + e1000_update_adaptive(hw); + + if (!netif_carrier_ok(netdev)) { + if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) { + /* We've lost link, so the controller stops DMA, + * but we've got queued Tx work that's never going + * to get done, so reset controller to flush Tx. + * (Do the reset outside of interrupt context). + */ + adapter->tx_timeout_count++; + schedule_work(&adapter->reset_task); + /* exit immediately since reset is imminent */ + return; + } + } + + /* Simple mode for Interrupt Throttle Rate (ITR) */ + if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) { + /* Symmetric Tx/Rx gets a reduced ITR=2000; + * Total asymmetrical Tx or Rx gets ITR=8000; + * everyone else is between 2000-8000. + */ + u32 goc = (adapter->gotcl + adapter->gorcl) / 10000; + u32 dif = (adapter->gotcl > adapter->gorcl ? + adapter->gotcl - adapter->gorcl : + adapter->gorcl - adapter->gotcl) / 10000; + u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000; + + ew32(ITR, 1000000000 / (itr * 256)); + } + + /* Cause software interrupt to ensure rx ring is cleaned */ + ew32(ICS, E1000_ICS_RXDMT0); + + /* Force detection of hung controller every watchdog period */ + adapter->detect_tx_hung = true; + + /* Reschedule the task */ + if (!test_bit(__E1000_DOWN, &adapter->flags)) + schedule_delayed_work(&adapter->watchdog_task, 2 * HZ); +} + +enum latency_range { + lowest_latency = 0, + low_latency = 1, + bulk_latency = 2, + latency_invalid = 255 +}; + +/** + * e1000_update_itr - update the dynamic ITR value based on statistics + * @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 + * + * 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 e1000_param.c) + **/ +static unsigned int e1000_update_itr(struct e1000_adapter *adapter, + u16 itr_setting, int packets, int bytes) +{ + unsigned int retval = itr_setting; + struct e1000_hw *hw = &adapter->hw; + + if (unlikely(hw->mac_type < e1000_82540)) + goto update_itr_done; + + if (packets == 0) + goto update_itr_done; + + switch (itr_setting) { + case lowest_latency: + /* jumbo frames get bulk treatment*/ + 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) { + /* jumbo frames need bulk latency setting */ + 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 e1000_set_itr(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + u16 current_itr; + u32 new_itr = adapter->itr; + + if (unlikely(hw->mac_type < e1000_82540)) + return; + + /* for non-gigabit speeds, just fix the interrupt rate at 4000 */ + if (unlikely(adapter->link_speed != SPEED_1000)) { + new_itr = 4000; + goto set_itr_now; + } + + adapter->tx_itr = e1000_update_itr(adapter, adapter->tx_itr, + adapter->total_tx_packets, + adapter->total_tx_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; + + adapter->rx_itr = e1000_update_itr(adapter, adapter->rx_itr, + adapter->total_rx_packets, + adapter->total_rx_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; + + current_itr = max(adapter->rx_itr, adapter->tx_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; + adapter->itr = new_itr; + ew32(ITR, 1000000000 / (new_itr * 256)); + } +} + +#define E1000_TX_FLAGS_CSUM 0x00000001 +#define E1000_TX_FLAGS_VLAN 0x00000002 +#define E1000_TX_FLAGS_TSO 0x00000004 +#define E1000_TX_FLAGS_IPV4 0x00000008 +#define E1000_TX_FLAGS_NO_FCS 0x00000010 +#define E1000_TX_FLAGS_VLAN_MASK 0xffff0000 +#define E1000_TX_FLAGS_VLAN_SHIFT 16 + +static int e1000_tso(struct e1000_adapter *adapter, + struct e1000_tx_ring *tx_ring, struct sk_buff *skb, + __be16 protocol) +{ + struct e1000_context_desc *context_desc; + struct e1000_tx_buffer *buffer_info; + unsigned int i; + u32 cmd_length = 0; + u16 ipcse = 0, tucse, mss; + u8 ipcss, ipcso, tucss, tucso, hdr_len; + + if (skb_is_gso(skb)) { + int err; + + err = skb_cow_head(skb, 0); + if (err < 0) + return err; + + hdr_len = skb_tcp_all_headers(skb); + mss = skb_shinfo(skb)->gso_size; + if (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); + cmd_length = E1000_TXD_CMD_IP; + ipcse = skb_transport_offset(skb) - 1; + } else if (skb_is_gso_v6(skb)) { + tcp_v6_gso_csum_prep(skb); + ipcse = 0; + } + ipcss = skb_network_offset(skb); + ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data; + tucss = skb_transport_offset(skb); + tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; + tucse = 0; + + cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE | + E1000_TXD_CMD_TCP | (skb->len - (hdr_len))); + + i = tx_ring->next_to_use; + context_desc = E1000_CONTEXT_DESC(*tx_ring, i); + buffer_info = &tx_ring->buffer_info[i]; + + context_desc->lower_setup.ip_fields.ipcss = ipcss; + context_desc->lower_setup.ip_fields.ipcso = ipcso; + context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse); + context_desc->upper_setup.tcp_fields.tucss = tucss; + context_desc->upper_setup.tcp_fields.tucso = tucso; + context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse); + context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss); + context_desc->tcp_seg_setup.fields.hdr_len = hdr_len; + context_desc->cmd_and_length = cpu_to_le32(cmd_length); + + buffer_info->time_stamp = jiffies; + buffer_info->next_to_watch = i; + + if (++i == tx_ring->count) + i = 0; + + tx_ring->next_to_use = i; + + return true; + } + return false; +} + +static bool e1000_tx_csum(struct e1000_adapter *adapter, + struct e1000_tx_ring *tx_ring, struct sk_buff *skb, + __be16 protocol) +{ + struct e1000_context_desc *context_desc; + struct e1000_tx_buffer *buffer_info; + unsigned int i; + u8 css; + u32 cmd_len = E1000_TXD_CMD_DEXT; + + if (skb->ip_summed != CHECKSUM_PARTIAL) + return false; + + switch (protocol) { + case cpu_to_be16(ETH_P_IP): + if (ip_hdr(skb)->protocol == IPPROTO_TCP) + cmd_len |= E1000_TXD_CMD_TCP; + break; + case cpu_to_be16(ETH_P_IPV6): + /* XXX not handling all IPV6 headers */ + if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) + cmd_len |= E1000_TXD_CMD_TCP; + break; + default: + if (unlikely(net_ratelimit())) + e_warn(drv, "checksum_partial proto=%x!\n", + skb->protocol); + break; + } + + css = skb_checksum_start_offset(skb); + + i = tx_ring->next_to_use; + buffer_info = &tx_ring->buffer_info[i]; + context_desc = E1000_CONTEXT_DESC(*tx_ring, i); + + context_desc->lower_setup.ip_config = 0; + context_desc->upper_setup.tcp_fields.tucss = css; + context_desc->upper_setup.tcp_fields.tucso = + css + skb->csum_offset; + context_desc->upper_setup.tcp_fields.tucse = 0; + context_desc->tcp_seg_setup.data = 0; + context_desc->cmd_and_length = cpu_to_le32(cmd_len); + + buffer_info->time_stamp = jiffies; + buffer_info->next_to_watch = i; + + if (unlikely(++i == tx_ring->count)) + i = 0; + + tx_ring->next_to_use = i; + + return true; +} + +#define E1000_MAX_TXD_PWR 12 +#define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR) + +static int e1000_tx_map(struct e1000_adapter *adapter, + struct e1000_tx_ring *tx_ring, + struct sk_buff *skb, unsigned int first, + unsigned int max_per_txd, unsigned int nr_frags, + unsigned int mss) +{ + struct e1000_hw *hw = &adapter->hw; + struct pci_dev *pdev = adapter->pdev; + struct e1000_tx_buffer *buffer_info; + unsigned int len = skb_headlen(skb); + unsigned int offset = 0, size, count = 0, i; + unsigned int f, bytecount, segs; + + i = tx_ring->next_to_use; + + while (len) { + buffer_info = &tx_ring->buffer_info[i]; + size = min(len, max_per_txd); + /* Workaround for Controller erratum -- + * descriptor for non-tso packet in a linear SKB that follows a + * tso gets written back prematurely before the data is fully + * DMA'd to the controller + */ + if (!skb->data_len && tx_ring->last_tx_tso && + !skb_is_gso(skb)) { + tx_ring->last_tx_tso = false; + size -= 4; + } + + /* Workaround for premature desc write-backs + * in TSO mode. Append 4-byte sentinel desc + */ + if (unlikely(mss && !nr_frags && size == len && size > 8)) + size -= 4; + /* work-around for errata 10 and it applies + * to all controllers in PCI-X mode + * The fix is to make sure that the first descriptor of a + * packet is smaller than 2048 - 16 - 16 (or 2016) bytes + */ + if (unlikely((hw->bus_type == e1000_bus_type_pcix) && + (size > 2015) && count == 0)) + size = 2015; + + /* Workaround for potential 82544 hang in PCI-X. Avoid + * terminating buffers within evenly-aligned dwords. + */ + if (unlikely(adapter->pcix_82544 && + !((unsigned long)(skb->data + offset + size - 1) & 4) && + size > 4)) + size -= 4; + + buffer_info->length = size; + /* set time_stamp *before* dma to help avoid a possible race */ + buffer_info->time_stamp = jiffies; + buffer_info->mapped_as_page = false; + buffer_info->dma = dma_map_single(&pdev->dev, + skb->data + offset, + size, DMA_TO_DEVICE); + if (dma_mapping_error(&pdev->dev, buffer_info->dma)) + goto dma_error; + buffer_info->next_to_watch = i; + + len -= size; + offset += size; + count++; + if (len) { + i++; + if (unlikely(i == tx_ring->count)) + i = 0; + } + } + + for (f = 0; f < nr_frags; f++) { + const skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; + + len = skb_frag_size(frag); + offset = 0; + + while (len) { + unsigned long bufend; + i++; + if (unlikely(i == tx_ring->count)) + i = 0; + + buffer_info = &tx_ring->buffer_info[i]; + size = min(len, max_per_txd); + /* Workaround for premature desc write-backs + * in TSO mode. Append 4-byte sentinel desc + */ + if (unlikely(mss && f == (nr_frags-1) && + size == len && size > 8)) + size -= 4; + /* Workaround for potential 82544 hang in PCI-X. + * Avoid terminating buffers within evenly-aligned + * dwords. + */ + bufend = (unsigned long) + page_to_phys(skb_frag_page(frag)); + bufend += offset + size - 1; + if (unlikely(adapter->pcix_82544 && + !(bufend & 4) && + size > 4)) + size -= 4; + + buffer_info->length = size; + buffer_info->time_stamp = jiffies; + buffer_info->mapped_as_page = true; + buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, + offset, size, DMA_TO_DEVICE); + if (dma_mapping_error(&pdev->dev, buffer_info->dma)) + goto dma_error; + buffer_info->next_to_watch = i; + + len -= size; + offset += size; + count++; + } + } + + segs = skb_shinfo(skb)->gso_segs ?: 1; + /* multiply data chunks by size of headers */ + bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len; + + tx_ring->buffer_info[i].skb = skb; + tx_ring->buffer_info[i].segs = segs; + tx_ring->buffer_info[i].bytecount = bytecount; + tx_ring->buffer_info[first].next_to_watch = i; + + return count; + +dma_error: + dev_err(&pdev->dev, "TX DMA map failed\n"); + buffer_info->dma = 0; + if (count) + count--; + + while (count--) { + if (i == 0) + i += tx_ring->count; + i--; + buffer_info = &tx_ring->buffer_info[i]; + e1000_unmap_and_free_tx_resource(adapter, buffer_info, 0); + } + + return 0; +} + +static void e1000_tx_queue(struct e1000_adapter *adapter, + struct e1000_tx_ring *tx_ring, int tx_flags, + int count) +{ + struct e1000_tx_desc *tx_desc = NULL; + struct e1000_tx_buffer *buffer_info; + u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS; + unsigned int i; + + if (likely(tx_flags & E1000_TX_FLAGS_TSO)) { + txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D | + E1000_TXD_CMD_TSE; + txd_upper |= E1000_TXD_POPTS_TXSM << 8; + + if (likely(tx_flags & E1000_TX_FLAGS_IPV4)) + txd_upper |= E1000_TXD_POPTS_IXSM << 8; + } + + if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) { + txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; + txd_upper |= E1000_TXD_POPTS_TXSM << 8; + } + + if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) { + txd_lower |= E1000_TXD_CMD_VLE; + txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK); + } + + if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) + txd_lower &= ~(E1000_TXD_CMD_IFCS); + + i = tx_ring->next_to_use; + + while (count--) { + buffer_info = &tx_ring->buffer_info[i]; + tx_desc = E1000_TX_DESC(*tx_ring, i); + tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); + tx_desc->lower.data = + cpu_to_le32(txd_lower | buffer_info->length); + tx_desc->upper.data = cpu_to_le32(txd_upper); + if (unlikely(++i == tx_ring->count)) + i = 0; + } + + tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd); + + /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */ + if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) + tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS)); + + /* 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). + */ + dma_wmb(); + + tx_ring->next_to_use = i; +} + +/* 82547 workaround to avoid controller hang in half-duplex environment. + * The workaround is to avoid queuing a large packet that would span + * the internal Tx FIFO ring boundary by notifying the stack to resend + * the packet at a later time. This gives the Tx FIFO an opportunity to + * flush all packets. When that occurs, we reset the Tx FIFO pointers + * to the beginning of the Tx FIFO. + */ + +#define E1000_FIFO_HDR 0x10 +#define E1000_82547_PAD_LEN 0x3E0 + +static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, + struct sk_buff *skb) +{ + u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head; + u32 skb_fifo_len = skb->len + E1000_FIFO_HDR; + + skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR); + + if (adapter->link_duplex != HALF_DUPLEX) + goto no_fifo_stall_required; + + if (atomic_read(&adapter->tx_fifo_stall)) + return 1; + + if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) { + atomic_set(&adapter->tx_fifo_stall, 1); + return 1; + } + +no_fifo_stall_required: + adapter->tx_fifo_head += skb_fifo_len; + if (adapter->tx_fifo_head >= adapter->tx_fifo_size) + adapter->tx_fifo_head -= adapter->tx_fifo_size; + return 0; +} + +static int __e1000_maybe_stop_tx(struct net_device *netdev, int size) +{ + struct e1000_adapter *adapter = netdev_priv(netdev); + struct e1000_tx_ring *tx_ring = adapter->tx_ring; + + 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 (likely(E1000_DESC_UNUSED(tx_ring) < size)) + return -EBUSY; + + /* A reprieve! */ + netif_start_queue(netdev); + ++adapter->restart_queue; + return 0; +} + +static int e1000_maybe_stop_tx(struct net_device *netdev, + struct e1000_tx_ring *tx_ring, int size) +{ + if (likely(E1000_DESC_UNUSED(tx_ring) >= size)) + return 0; + return __e1000_maybe_stop_tx(netdev, size); +} + +#define TXD_USE_COUNT(S, X) (((S) + ((1 << (X)) - 1)) >> (X)) +static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, + struct net_device *netdev) +{ + struct e1000_adapter *adapter = netdev_priv(netdev); + struct e1000_hw *hw = &adapter->hw; + struct e1000_tx_ring *tx_ring; + unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD; + unsigned int max_txd_pwr = E1000_MAX_TXD_PWR; + unsigned int tx_flags = 0; + unsigned int len = skb_headlen(skb); + unsigned int nr_frags; + unsigned int mss; + int count = 0; + int tso; + unsigned int f; + __be16 protocol = vlan_get_protocol(skb); + + /* 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. + */ + tx_ring = adapter->tx_ring; + + /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN, + * packets may get corrupted during padding by HW. + * To WA this issue, pad all small packets manually. + */ + if (eth_skb_pad(skb)) + return NETDEV_TX_OK; + + mss = skb_shinfo(skb)->gso_size; + /* The controller does a simple calculation to + * make sure there is enough room in the FIFO before + * initiating the DMA for each buffer. The calc is: + * 4 = ceil(buffer len/mss). To make sure we don't + * overrun the FIFO, adjust the max buffer len if mss + * drops. + */ + if (mss) { + u8 hdr_len; + max_per_txd = min(mss << 2, max_per_txd); + max_txd_pwr = fls(max_per_txd) - 1; + + hdr_len = skb_tcp_all_headers(skb); + if (skb->data_len && hdr_len == len) { + switch (hw->mac_type) { + case e1000_82544: { + unsigned int pull_size; + + /* Make sure we have room to chop off 4 bytes, + * and that the end alignment will work out to + * this hardware's requirements + * NOTE: this is a TSO only workaround + * if end byte alignment not correct move us + * into the next dword + */ + if ((unsigned long)(skb_tail_pointer(skb) - 1) + & 4) + break; + pull_size = min((unsigned int)4, skb->data_len); + if (!__pskb_pull_tail(skb, pull_size)) { + e_err(drv, "__pskb_pull_tail " + "failed.\n"); + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; + } + len = skb_headlen(skb); + break; + } + default: + /* do nothing */ + break; + } + } + } + + /* reserve a descriptor for the offload context */ + if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL)) + count++; + count++; + + /* Controller Erratum workaround */ + if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb)) + count++; + + count += TXD_USE_COUNT(len, max_txd_pwr); + + if (adapter->pcix_82544) + count++; + + /* work-around for errata 10 and it applies to all controllers + * in PCI-X mode, so add one more descriptor to the count + */ + if (unlikely((hw->bus_type == e1000_bus_type_pcix) && + (len > 2015))) + count++; + + nr_frags = skb_shinfo(skb)->nr_frags; + for (f = 0; f < nr_frags; f++) + count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]), + max_txd_pwr); + if (adapter->pcix_82544) + count += nr_frags; + + /* need: count + 2 desc gap to keep tail from touching + * head, otherwise try next time + */ + if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) + return NETDEV_TX_BUSY; + + if (unlikely((hw->mac_type == e1000_82547) && + (e1000_82547_fifo_workaround(adapter, skb)))) { + netif_stop_queue(netdev); + if (!test_bit(__E1000_DOWN, &adapter->flags)) + schedule_delayed_work(&adapter->fifo_stall_task, 1); + return NETDEV_TX_BUSY; + } + + if (skb_vlan_tag_present(skb)) { + tx_flags |= E1000_TX_FLAGS_VLAN; + tx_flags |= (skb_vlan_tag_get(skb) << + E1000_TX_FLAGS_VLAN_SHIFT); + } + + first = tx_ring->next_to_use; + + tso = e1000_tso(adapter, tx_ring, skb, protocol); + if (tso < 0) { + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; + } + + if (likely(tso)) { + if (likely(hw->mac_type != e1000_82544)) + tx_ring->last_tx_tso = true; + tx_flags |= E1000_TX_FLAGS_TSO; + } else if (likely(e1000_tx_csum(adapter, tx_ring, skb, protocol))) + tx_flags |= E1000_TX_FLAGS_CSUM; + + if (protocol == htons(ETH_P_IP)) + tx_flags |= E1000_TX_FLAGS_IPV4; + + if (unlikely(skb->no_fcs)) + tx_flags |= E1000_TX_FLAGS_NO_FCS; + + count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd, + nr_frags, mss); + + if (count) { + /* The descriptors needed is higher than other Intel drivers + * due to a number of workarounds. The breakdown is below: + * Data descriptors: MAX_SKB_FRAGS + 1 + * Context Descriptor: 1 + * Keep head from touching tail: 2 + * Workarounds: 3 + */ + int desc_needed = MAX_SKB_FRAGS + 7; + + netdev_sent_queue(netdev, skb->len); + skb_tx_timestamp(skb); + + e1000_tx_queue(adapter, tx_ring, tx_flags, count); + + /* 82544 potentially requires twice as many data descriptors + * in order to guarantee buffers don't end on evenly-aligned + * dwords + */ + if (adapter->pcix_82544) + desc_needed += MAX_SKB_FRAGS + 1; + + /* Make sure there is space in the ring for the next send. */ + e1000_maybe_stop_tx(netdev, tx_ring, desc_needed); + + if (!netdev_xmit_more() || + netif_xmit_stopped(netdev_get_tx_queue(netdev, 0))) { + writel(tx_ring->next_to_use, hw->hw_addr + tx_ring->tdt); + } + } else { + dev_kfree_skb_any(skb); + tx_ring->buffer_info[first].time_stamp = 0; + tx_ring->next_to_use = first; + } + + return NETDEV_TX_OK; +} + +#define NUM_REGS 38 /* 1 based count */ +static void e1000_regdump(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + u32 regs[NUM_REGS]; + u32 *regs_buff = regs; + int i = 0; + + static const char * const reg_name[] = { + "CTRL", "STATUS", + "RCTL", "RDLEN", "RDH", "RDT", "RDTR", + "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT", + "TIDV", "TXDCTL", "TADV", "TARC0", + "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1", + "TXDCTL1", "TARC1", + "CTRL_EXT", "ERT", "RDBAL", "RDBAH", + "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC", + "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC" + }; + + regs_buff[0] = er32(CTRL); + regs_buff[1] = er32(STATUS); + + regs_buff[2] = er32(RCTL); + regs_buff[3] = er32(RDLEN); + regs_buff[4] = er32(RDH); + regs_buff[5] = er32(RDT); + regs_buff[6] = er32(RDTR); + + regs_buff[7] = er32(TCTL); + regs_buff[8] = er32(TDBAL); + regs_buff[9] = er32(TDBAH); + regs_buff[10] = er32(TDLEN); + regs_buff[11] = er32(TDH); + regs_buff[12] = er32(TDT); + regs_buff[13] = er32(TIDV); + regs_buff[14] = er32(TXDCTL); + regs_buff[15] = er32(TADV); + regs_buff[16] = er32(TARC0); + + regs_buff[17] = er32(TDBAL1); + regs_buff[18] = er32(TDBAH1); + regs_buff[19] = er32(TDLEN1); + regs_buff[20] = er32(TDH1); + regs_buff[21] = er32(TDT1); + regs_buff[22] = er32(TXDCTL1); + regs_buff[23] = er32(TARC1); + regs_buff[24] = er32(CTRL_EXT); + regs_buff[25] = er32(ERT); + regs_buff[26] = er32(RDBAL0); + regs_buff[27] = er32(RDBAH0); + regs_buff[28] = er32(TDFH); + regs_buff[29] = er32(TDFT); + regs_buff[30] = er32(TDFHS); + regs_buff[31] = er32(TDFTS); + regs_buff[32] = er32(TDFPC); + regs_buff[33] = er32(RDFH); + regs_buff[34] = er32(RDFT); + regs_buff[35] = er32(RDFHS); + regs_buff[36] = er32(RDFTS); + regs_buff[37] = er32(RDFPC); + + pr_info("Register dump\n"); + for (i = 0; i < NUM_REGS; i++) + pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]); +} + +/* + * e1000_dump: Print registers, tx ring and rx ring + */ +static void e1000_dump(struct e1000_adapter *adapter) +{ + /* this code doesn't handle multiple rings */ + struct e1000_tx_ring *tx_ring = adapter->tx_ring; + struct e1000_rx_ring *rx_ring = adapter->rx_ring; + int i; + + if (!netif_msg_hw(adapter)) + return; + + /* Print Registers */ + e1000_regdump(adapter); + + /* transmit dump */ + pr_info("TX Desc ring0 dump\n"); + + /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended) + * + * Legacy Transmit Descriptor + * +--------------------------------------------------------------+ + * 0 | Buffer Address [63:0] (Reserved on Write Back) | + * +--------------------------------------------------------------+ + * 8 | Special | CSS | Status | CMD | CSO | Length | + * +--------------------------------------------------------------+ + * 63 48 47 36 35 32 31 24 23 16 15 0 + * + * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload + * 63 48 47 40 39 32 31 16 15 8 7 0 + * +----------------------------------------------------------------+ + * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS | + * +----------------------------------------------------------------+ + * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN | + * +----------------------------------------------------------------+ + * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 + * + * Extended Data Descriptor (DTYP=0x1) + * +----------------------------------------------------------------+ + * 0 | Buffer Address [63:0] | + * +----------------------------------------------------------------+ + * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN | + * +----------------------------------------------------------------+ + * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 + */ + pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n"); + pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n"); + + if (!netif_msg_tx_done(adapter)) + goto rx_ring_summary; + + for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) { + struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i); + struct e1000_tx_buffer *buffer_info = &tx_ring->buffer_info[i]; + struct my_u { __le64 a; __le64 b; }; + struct my_u *u = (struct my_u *)tx_desc; + const char *type; + + if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean) + type = "NTC/U"; + else if (i == tx_ring->next_to_use) + type = "NTU"; + else if (i == tx_ring->next_to_clean) + type = "NTC"; + else + type = ""; + + pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n", + ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i, + le64_to_cpu(u->a), le64_to_cpu(u->b), + (u64)buffer_info->dma, buffer_info->length, + buffer_info->next_to_watch, + (u64)buffer_info->time_stamp, buffer_info->skb, type); + } + +rx_ring_summary: + /* receive dump */ + pr_info("\nRX Desc ring dump\n"); + + /* Legacy Receive Descriptor Format + * + * +-----------------------------------------------------+ + * | Buffer Address [63:0] | + * +-----------------------------------------------------+ + * | VLAN Tag | Errors | Status 0 | Packet csum | Length | + * +-----------------------------------------------------+ + * 63 48 47 40 39 32 31 16 15 0 + */ + pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n"); + + if (!netif_msg_rx_status(adapter)) + goto exit; + + for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) { + struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i); + struct e1000_rx_buffer *buffer_info = &rx_ring->buffer_info[i]; + struct my_u { __le64 a; __le64 b; }; + struct my_u *u = (struct my_u *)rx_desc; + const char *type; + + if (i == rx_ring->next_to_use) + type = "NTU"; + else if (i == rx_ring->next_to_clean) + type = "NTC"; + else + type = ""; + + pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n", + i, le64_to_cpu(u->a), le64_to_cpu(u->b), + (u64)buffer_info->dma, buffer_info->rxbuf.data, type); + } /* for */ + + /* dump the descriptor caches */ + /* rx */ + pr_info("Rx descriptor cache in 64bit format\n"); + for (i = 0x6000; i <= 0x63FF ; i += 0x10) { + pr_info("R%04X: %08X|%08X %08X|%08X\n", + i, + readl(adapter->hw.hw_addr + i+4), + readl(adapter->hw.hw_addr + i), + readl(adapter->hw.hw_addr + i+12), + readl(adapter->hw.hw_addr + i+8)); + } + /* tx */ + pr_info("Tx descriptor cache in 64bit format\n"); + for (i = 0x7000; i <= 0x73FF ; i += 0x10) { + pr_info("T%04X: %08X|%08X %08X|%08X\n", + i, + readl(adapter->hw.hw_addr + i+4), + readl(adapter->hw.hw_addr + i), + readl(adapter->hw.hw_addr + i+12), + readl(adapter->hw.hw_addr + i+8)); + } +exit: + return; +} + +/** + * e1000_tx_timeout - Respond to a Tx Hang + * @netdev: network interface device structure + * @txqueue: number of the Tx queue that hung (unused) + **/ +static void e1000_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue) +{ + struct e1000_adapter *adapter = netdev_priv(netdev); + + /* Do the reset outside of interrupt context */ + adapter->tx_timeout_count++; + schedule_work(&adapter->reset_task); +} + +static void e1000_reset_task(struct work_struct *work) +{ + struct e1000_adapter *adapter = + container_of(work, struct e1000_adapter, reset_task); + + e_err(drv, "Reset adapter\n"); + e1000_reinit_locked(adapter); +} + +/** + * e1000_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 e1000_change_mtu(struct net_device *netdev, int new_mtu) +{ + struct e1000_adapter *adapter = netdev_priv(netdev); + struct e1000_hw *hw = &adapter->hw; + int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; + + /* Adapter-specific max frame size limits. */ + switch (hw->mac_type) { + case e1000_undefined ... e1000_82542_rev2_1: + if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) { + e_err(probe, "Jumbo Frames not supported.\n"); + return -EINVAL; + } + break; + default: + /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */ + break; + } + + while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) + msleep(1); + /* e1000_down has a dependency on max_frame_size */ + hw->max_frame_size = max_frame; + if (netif_running(netdev)) { + /* prevent buffers from being reallocated */ + adapter->alloc_rx_buf = e1000_alloc_dummy_rx_buffers; + e1000_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 + * however with the new *_jumbo_rx* routines, jumbo receives will use + * fragmented skbs + */ + + if (max_frame <= E1000_RXBUFFER_2048) + adapter->rx_buffer_len = E1000_RXBUFFER_2048; + else +#if (PAGE_SIZE >= E1000_RXBUFFER_16384) + adapter->rx_buffer_len = E1000_RXBUFFER_16384; +#elif (PAGE_SIZE >= E1000_RXBUFFER_4096) + adapter->rx_buffer_len = PAGE_SIZE; +#endif + + /* adjust allocation if LPE protects us, and we aren't using SBP */ + if (!hw->tbi_compatibility_on && + ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) || + (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE))) + adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; + + netdev_dbg(netdev, "changing MTU from %d to %d\n", + netdev->mtu, new_mtu); + netdev->mtu = new_mtu; + + if (netif_running(netdev)) + e1000_up(adapter); + else + e1000_reset(adapter); + + clear_bit(__E1000_RESETTING, &adapter->flags); + + return 0; +} + +/** + * e1000_update_stats - Update the board statistics counters + * @adapter: board private structure + **/ +void e1000_update_stats(struct e1000_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct e1000_hw *hw = &adapter->hw; + struct pci_dev *pdev = adapter->pdev; + unsigned long flags; + 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; + + spin_lock_irqsave(&adapter->stats_lock, flags); + + /* these counters are modified from e1000_tbi_adjust_stats, + * called from the interrupt context, so they must only + * be written while holding adapter->stats_lock + */ + + adapter->stats.crcerrs += er32(CRCERRS); + adapter->stats.gprc += er32(GPRC); + adapter->stats.gorcl += er32(GORCL); + adapter->stats.gorch += er32(GORCH); + adapter->stats.bprc += er32(BPRC); + adapter->stats.mprc += er32(MPRC); + adapter->stats.roc += er32(ROC); + + adapter->stats.prc64 += er32(PRC64); + adapter->stats.prc127 += er32(PRC127); + adapter->stats.prc255 += er32(PRC255); + adapter->stats.prc511 += er32(PRC511); + adapter->stats.prc1023 += er32(PRC1023); + adapter->stats.prc1522 += er32(PRC1522); + + adapter->stats.symerrs += er32(SYMERRS); + adapter->stats.mpc += er32(MPC); + adapter->stats.scc += er32(SCC); + adapter->stats.ecol += er32(ECOL); + adapter->stats.mcc += er32(MCC); + adapter->stats.latecol += er32(LATECOL); + adapter->stats.dc += er32(DC); + adapter->stats.sec += er32(SEC); + adapter->stats.rlec += er32(RLEC); + adapter->stats.xonrxc += er32(XONRXC); + adapter->stats.xontxc += er32(XONTXC); + adapter->stats.xoffrxc += er32(XOFFRXC); + adapter->stats.xofftxc += er32(XOFFTXC); + adapter->stats.fcruc += er32(FCRUC); + adapter->stats.gptc += er32(GPTC); + adapter->stats.gotcl += er32(GOTCL); + adapter->stats.gotch += er32(GOTCH); + adapter->stats.rnbc += er32(RNBC); + adapter->stats.ruc += er32(RUC); + adapter->stats.rfc += er32(RFC); + adapter->stats.rjc += er32(RJC); + adapter->stats.torl += er32(TORL); + adapter->stats.torh += er32(TORH); + adapter->stats.totl += er32(TOTL); + adapter->stats.toth += er32(TOTH); + adapter->stats.tpr += er32(TPR); + + adapter->stats.ptc64 += er32(PTC64); + adapter->stats.ptc127 += er32(PTC127); + adapter->stats.ptc255 += er32(PTC255); + adapter->stats.ptc511 += er32(PTC511); + adapter->stats.ptc1023 += er32(PTC1023); + adapter->stats.ptc1522 += er32(PTC1522); + + adapter->stats.mptc += er32(MPTC); + adapter->stats.bptc += er32(BPTC); + + /* used for adaptive IFS */ + + hw->tx_packet_delta = er32(TPT); + adapter->stats.tpt += hw->tx_packet_delta; + hw->collision_delta = er32(COLC); + adapter->stats.colc += hw->collision_delta; + + if (hw->mac_type >= e1000_82543) { + adapter->stats.algnerrc += er32(ALGNERRC); + adapter->stats.rxerrc += er32(RXERRC); + adapter->stats.tncrs += er32(TNCRS); + adapter->stats.cexterr += er32(CEXTERR); + adapter->stats.tsctc += er32(TSCTC); + adapter->stats.tsctfc += er32(TSCTFC); + } + + /* Fill out the OS statistics structure */ + netdev->stats.multicast = adapter->stats.mprc; + netdev->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 + */ + netdev->stats.rx_errors = adapter->stats.rxerrc + + adapter->stats.crcerrs + adapter->stats.algnerrc + + adapter->stats.ruc + adapter->stats.roc + + adapter->stats.cexterr; + adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc; + netdev->stats.rx_length_errors = adapter->stats.rlerrc; + netdev->stats.rx_crc_errors = adapter->stats.crcerrs; + netdev->stats.rx_frame_errors = adapter->stats.algnerrc; + netdev->stats.rx_missed_errors = adapter->stats.mpc; + + /* Tx Errors */ + adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol; + netdev->stats.tx_errors = adapter->stats.txerrc; + netdev->stats.tx_aborted_errors = adapter->stats.ecol; + netdev->stats.tx_window_errors = adapter->stats.latecol; + netdev->stats.tx_carrier_errors = adapter->stats.tncrs; + if (hw->bad_tx_carr_stats_fd && + adapter->link_duplex == FULL_DUPLEX) { + netdev->stats.tx_carrier_errors = 0; + adapter->stats.tncrs = 0; + } + + /* Tx Dropped needs to be maintained elsewhere */ + + /* Phy Stats */ + if (hw->media_type == e1000_media_type_copper) { + if ((adapter->link_speed == SPEED_1000) && + (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) { + phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK; + adapter->phy_stats.idle_errors += phy_tmp; + } + + if ((hw->mac_type <= e1000_82546) && + (hw->phy_type == e1000_phy_m88) && + !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp)) + adapter->phy_stats.receive_errors += phy_tmp; + } + + /* Management Stats */ + if (hw->has_smbus) { + adapter->stats.mgptc += er32(MGTPTC); + adapter->stats.mgprc += er32(MGTPRC); + adapter->stats.mgpdc += er32(MGTPDC); + } + + spin_unlock_irqrestore(&adapter->stats_lock, flags); +} + +/** + * e1000_intr - Interrupt Handler + * @irq: interrupt number + * @data: pointer to a network interface device structure + **/ +static irqreturn_t e1000_intr(int irq, void *data) +{ + struct net_device *netdev = data; + struct e1000_adapter *adapter = netdev_priv(netdev); + struct e1000_hw *hw = &adapter->hw; + u32 icr = er32(ICR); + + if (unlikely((!icr))) + return IRQ_NONE; /* Not our interrupt */ + + /* we might have caused the interrupt, but the above + * read cleared it, and just in case the driver is + * down there is nothing to do so return handled + */ + if (unlikely(test_bit(__E1000_DOWN, &adapter->flags))) + return IRQ_HANDLED; + + if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) { + hw->get_link_status = 1; + /* guard against interrupt when we're going down */ + if (!test_bit(__E1000_DOWN, &adapter->flags)) + schedule_delayed_work(&adapter->watchdog_task, 1); + } + + /* disable interrupts, without the synchronize_irq bit */ + ew32(IMC, ~0); + E1000_WRITE_FLUSH(); + + if (likely(napi_schedule_prep(&adapter->napi))) { + adapter->total_tx_bytes = 0; + adapter->total_tx_packets = 0; + adapter->total_rx_bytes = 0; + adapter->total_rx_packets = 0; + __napi_schedule(&adapter->napi); + } else { + /* this really should not happen! if it does it is basically a + * bug, but not a hard error, so enable ints and continue + */ + if (!test_bit(__E1000_DOWN, &adapter->flags)) + e1000_irq_enable(adapter); + } + + return IRQ_HANDLED; +} + +/** + * e1000_clean - NAPI Rx polling callback + * @napi: napi struct containing references to driver info + * @budget: budget given to driver for receive packets + **/ +static int e1000_clean(struct napi_struct *napi, int budget) +{ + struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, + napi); + int tx_clean_complete = 0, work_done = 0; + + tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]); + + adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget); + + if (!tx_clean_complete || work_done == budget) + return budget; + + /* Exit the polling mode, but don't re-enable interrupts if stack might + * poll us due to busy-polling + */ + if (likely(napi_complete_done(napi, work_done))) { + if (likely(adapter->itr_setting & 3)) + e1000_set_itr(adapter); + if (!test_bit(__E1000_DOWN, &adapter->flags)) + e1000_irq_enable(adapter); + } + + return work_done; +} + +/** + * e1000_clean_tx_irq - Reclaim resources after transmit completes + * @adapter: board private structure + * @tx_ring: ring to clean + **/ +static bool e1000_clean_tx_irq(struct e1000_adapter *adapter, + struct e1000_tx_ring *tx_ring) +{ + struct e1000_hw *hw = &adapter->hw; + struct net_device *netdev = adapter->netdev; + struct e1000_tx_desc *tx_desc, *eop_desc; + struct e1000_tx_buffer *buffer_info; + unsigned int i, eop; + unsigned int count = 0; + unsigned int total_tx_bytes = 0, total_tx_packets = 0; + unsigned int bytes_compl = 0, pkts_compl = 0; + + i = tx_ring->next_to_clean; + eop = tx_ring->buffer_info[i].next_to_watch; + eop_desc = E1000_TX_DESC(*tx_ring, eop); + + while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) && + (count < tx_ring->count)) { + bool cleaned = false; + dma_rmb(); /* read buffer_info after eop_desc */ + for ( ; !cleaned; count++) { + tx_desc = E1000_TX_DESC(*tx_ring, i); + buffer_info = &tx_ring->buffer_info[i]; + cleaned = (i == eop); + + if (cleaned) { + total_tx_packets += buffer_info->segs; + total_tx_bytes += buffer_info->bytecount; + if (buffer_info->skb) { + bytes_compl += buffer_info->skb->len; + pkts_compl++; + } + + } + e1000_unmap_and_free_tx_resource(adapter, buffer_info, + 64); + tx_desc->upper.data = 0; + + if (unlikely(++i == tx_ring->count)) + i = 0; + } + + eop = tx_ring->buffer_info[i].next_to_watch; + eop_desc = E1000_TX_DESC(*tx_ring, eop); + } + + /* Synchronize with E1000_DESC_UNUSED called from e1000_xmit_frame, + * which will reuse the cleaned buffers. + */ + smp_store_release(&tx_ring->next_to_clean, i); + + netdev_completed_queue(netdev, pkts_compl, bytes_compl); + +#define TX_WAKE_THRESHOLD 32 + if (unlikely(count && netif_carrier_ok(netdev) && + E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) { + /* Make sure that anybody stopping the queue after this + * sees the new next_to_clean. + */ + smp_mb(); + + if (netif_queue_stopped(netdev) && + !(test_bit(__E1000_DOWN, &adapter->flags))) { + netif_wake_queue(netdev); + ++adapter->restart_queue; + } + } + + if (adapter->detect_tx_hung) { + /* Detect a transmit hang in hardware, this serializes the + * check with the clearing of time_stamp and movement of i + */ + adapter->detect_tx_hung = false; + if (tx_ring->buffer_info[eop].time_stamp && + time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + + (adapter->tx_timeout_factor * HZ)) && + !(er32(STATUS) & E1000_STATUS_TXOFF)) { + + /* detected Tx unit hang */ + e_err(drv, "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" + "buffer_info[next_to_clean]\n" + " time_stamp <%lx>\n" + " next_to_watch <%x>\n" + " jiffies <%lx>\n" + " next_to_watch.status <%x>\n", + (unsigned long)(tx_ring - adapter->tx_ring), + readl(hw->hw_addr + tx_ring->tdh), + readl(hw->hw_addr + tx_ring->tdt), + tx_ring->next_to_use, + tx_ring->next_to_clean, + tx_ring->buffer_info[eop].time_stamp, + eop, + jiffies, + eop_desc->upper.fields.status); + e1000_dump(adapter); + netif_stop_queue(netdev); + } + } + adapter->total_tx_bytes += total_tx_bytes; + adapter->total_tx_packets += total_tx_packets; + netdev->stats.tx_bytes += total_tx_bytes; + netdev->stats.tx_packets += total_tx_packets; + return count < tx_ring->count; +} + +/** + * e1000_rx_checksum - Receive Checksum Offload for 82543 + * @adapter: board private structure + * @status_err: receive descriptor status and error fields + * @csum: receive descriptor csum field + * @skb: socket buffer with received data + **/ +static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err, + u32 csum, struct sk_buff *skb) +{ + struct e1000_hw *hw = &adapter->hw; + u16 status = (u16)status_err; + u8 errors = (u8)(status_err >> 24); + + skb_checksum_none_assert(skb); + + /* 82543 or newer only */ + if (unlikely(hw->mac_type < e1000_82543)) + return; + /* Ignore Checksum bit is set */ + if (unlikely(status & E1000_RXD_STAT_IXSM)) + return; + /* TCP/UDP checksum error bit is set */ + if (unlikely(errors & E1000_RXD_ERR_TCPE)) { + /* let the stack verify checksum errors */ + adapter->hw_csum_err++; + return; + } + /* TCP/UDP Checksum has not been calculated */ + if (!(status & E1000_RXD_STAT_TCPCS)) + return; + + /* It must be a TCP or UDP packet with a valid checksum */ + if (likely(status & E1000_RXD_STAT_TCPCS)) { + /* TCP checksum is good */ + skb->ip_summed = CHECKSUM_UNNECESSARY; + } + adapter->hw_csum_good++; +} + +/** + * e1000_consume_page - helper function for jumbo Rx path + * @bi: software descriptor shadow data + * @skb: skb being modified + * @length: length of data being added + **/ +static void e1000_consume_page(struct e1000_rx_buffer *bi, struct sk_buff *skb, + u16 length) +{ + bi->rxbuf.page = NULL; + skb->len += length; + skb->data_len += length; + skb->truesize += PAGE_SIZE; +} + +/** + * e1000_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 e1000_receive_skb(struct e1000_adapter *adapter, u8 status, + __le16 vlan, struct sk_buff *skb) +{ + skb->protocol = eth_type_trans(skb, adapter->netdev); + + if (status & E1000_RXD_STAT_VP) { + u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK; + + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); + } + napi_gro_receive(&adapter->napi, skb); +} + +/** + * e1000_tbi_adjust_stats + * @hw: Struct containing variables accessed by shared code + * @stats: point to stats struct + * @frame_len: The length of the frame in question + * @mac_addr: The Ethernet destination address of the frame in question + * + * Adjusts the statistic counters when a frame is accepted by TBI_ACCEPT + */ +static void e1000_tbi_adjust_stats(struct e1000_hw *hw, + struct e1000_hw_stats *stats, + u32 frame_len, const u8 *mac_addr) +{ + u64 carry_bit; + + /* First adjust the frame length. */ + frame_len--; + /* We need to adjust the statistics counters, since the hardware + * counters overcount this packet as a CRC error and undercount + * the packet as a good packet + */ + /* This packet should not be counted as a CRC error. */ + stats->crcerrs--; + /* This packet does count as a Good Packet Received. */ + stats->gprc++; + + /* Adjust the Good Octets received counters */ + carry_bit = 0x80000000 & stats->gorcl; + stats->gorcl += frame_len; + /* If the high bit of Gorcl (the low 32 bits of the Good Octets + * Received Count) was one before the addition, + * AND it is zero after, then we lost the carry out, + * need to add one to Gorch (Good Octets Received Count High). + * This could be simplified if all environments supported + * 64-bit integers. + */ + if (carry_bit && ((stats->gorcl & 0x80000000) == 0)) + stats->gorch++; + /* Is this a broadcast or multicast? Check broadcast first, + * since the test for a multicast frame will test positive on + * a broadcast frame. + */ + if (is_broadcast_ether_addr(mac_addr)) + stats->bprc++; + else if (is_multicast_ether_addr(mac_addr)) + stats->mprc++; + + if (frame_len == hw->max_frame_size) { + /* In this case, the hardware has overcounted the number of + * oversize frames. + */ + if (stats->roc > 0) + stats->roc--; + } + + /* Adjust the bin counters when the extra byte put the frame in the + * wrong bin. Remember that the frame_len was adjusted above. + */ + if (frame_len == 64) { + stats->prc64++; + stats->prc127--; + } else if (frame_len == 127) { + stats->prc127++; + stats->prc255--; + } else if (frame_len == 255) { + stats->prc255++; + stats->prc511--; + } else if (frame_len == 511) { + stats->prc511++; + stats->prc1023--; + } else if (frame_len == 1023) { + stats->prc1023++; + stats->prc1522--; + } else if (frame_len == 1522) { + stats->prc1522++; + } +} + +static bool e1000_tbi_should_accept(struct e1000_adapter *adapter, + u8 status, u8 errors, + u32 length, const u8 *data) +{ + struct e1000_hw *hw = &adapter->hw; + u8 last_byte = *(data + length - 1); + + if (TBI_ACCEPT(hw, status, errors, length, last_byte)) { + unsigned long irq_flags; + + spin_lock_irqsave(&adapter->stats_lock, irq_flags); + e1000_tbi_adjust_stats(hw, &adapter->stats, length, data); + spin_unlock_irqrestore(&adapter->stats_lock, irq_flags); + + return true; + } + + return false; +} + +static struct sk_buff *e1000_alloc_rx_skb(struct e1000_adapter *adapter, + unsigned int bufsz) +{ + struct sk_buff *skb = napi_alloc_skb(&adapter->napi, bufsz); + + if (unlikely(!skb)) + adapter->alloc_rx_buff_failed++; + return skb; +} + +/** + * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy + * @adapter: board private structure + * @rx_ring: ring to clean + * @work_done: amount of napi work completed this call + * @work_to_do: max amount of work allowed for this call to do + * + * the return value indicates whether actual cleaning was done, there + * is no guarantee that everything was cleaned + */ +static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring, + int *work_done, int work_to_do) +{ + struct net_device *netdev = adapter->netdev; + struct pci_dev *pdev = adapter->pdev; + struct e1000_rx_desc *rx_desc, *next_rxd; + struct e1000_rx_buffer *buffer_info, *next_buffer; + u32 length; + unsigned int i; + int cleaned_count = 0; + bool cleaned = false; + unsigned int total_rx_bytes = 0, total_rx_packets = 0; + + i = rx_ring->next_to_clean; + rx_desc = E1000_RX_DESC(*rx_ring, i); + buffer_info = &rx_ring->buffer_info[i]; + + while (rx_desc->status & E1000_RXD_STAT_DD) { + struct sk_buff *skb; + u8 status; + + if (*work_done >= work_to_do) + break; + (*work_done)++; + dma_rmb(); /* read descriptor and rx_buffer_info after status DD */ + + status = rx_desc->status; + + if (++i == rx_ring->count) + i = 0; + + next_rxd = E1000_RX_DESC(*rx_ring, i); + prefetch(next_rxd); + + next_buffer = &rx_ring->buffer_info[i]; + + cleaned = true; + cleaned_count++; + dma_unmap_page(&pdev->dev, buffer_info->dma, + adapter->rx_buffer_len, DMA_FROM_DEVICE); + buffer_info->dma = 0; + + length = le16_to_cpu(rx_desc->length); + + /* errors is only valid for DD + EOP descriptors */ + if (unlikely((status & E1000_RXD_STAT_EOP) && + (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) { + u8 *mapped = page_address(buffer_info->rxbuf.page); + + if (e1000_tbi_should_accept(adapter, status, + rx_desc->errors, + length, mapped)) { + length--; + } else if (netdev->features & NETIF_F_RXALL) { + goto process_skb; + } else { + /* an error means any chain goes out the window + * too + */ + dev_kfree_skb(rx_ring->rx_skb_top); + rx_ring->rx_skb_top = NULL; + goto next_desc; + } + } + +#define rxtop rx_ring->rx_skb_top +process_skb: + if (!(status & E1000_RXD_STAT_EOP)) { + /* this descriptor is only the beginning (or middle) */ + if (!rxtop) { + /* this is the beginning of a chain */ + rxtop = napi_get_frags(&adapter->napi); + if (!rxtop) + break; + + skb_fill_page_desc(rxtop, 0, + buffer_info->rxbuf.page, + 0, length); + } else { + /* this is the middle of a chain */ + skb_fill_page_desc(rxtop, + skb_shinfo(rxtop)->nr_frags, + buffer_info->rxbuf.page, 0, length); + } + e1000_consume_page(buffer_info, rxtop, length); + goto next_desc; + } else { + if (rxtop) { + /* end of the chain */ + skb_fill_page_desc(rxtop, + skb_shinfo(rxtop)->nr_frags, + buffer_info->rxbuf.page, 0, length); + skb = rxtop; + rxtop = NULL; + e1000_consume_page(buffer_info, skb, length); + } else { + struct page *p; + /* no chain, got EOP, this buf is the packet + * copybreak to save the put_page/alloc_page + */ + p = buffer_info->rxbuf.page; + if (length <= copybreak) { + u8 *vaddr; + + if (likely(!(netdev->features & NETIF_F_RXFCS))) + length -= 4; + skb = e1000_alloc_rx_skb(adapter, + length); + if (!skb) + break; + + vaddr = kmap_atomic(p); + memcpy(skb_tail_pointer(skb), vaddr, + length); + kunmap_atomic(vaddr); + /* re-use the page, so don't erase + * buffer_info->rxbuf.page + */ + skb_put(skb, length); + e1000_rx_checksum(adapter, + status | rx_desc->errors << 24, + le16_to_cpu(rx_desc->csum), skb); + + total_rx_bytes += skb->len; + total_rx_packets++; + + e1000_receive_skb(adapter, status, + rx_desc->special, skb); + goto next_desc; + } else { + skb = napi_get_frags(&adapter->napi); + if (!skb) { + adapter->alloc_rx_buff_failed++; + break; + } + skb_fill_page_desc(skb, 0, p, 0, + length); + e1000_consume_page(buffer_info, skb, + length); + } + } + } + + /* Receive Checksum Offload XXX recompute due to CRC strip? */ + e1000_rx_checksum(adapter, + (u32)(status) | + ((u32)(rx_desc->errors) << 24), + le16_to_cpu(rx_desc->csum), skb); + + total_rx_bytes += (skb->len - 4); /* don't count FCS */ + if (likely(!(netdev->features & NETIF_F_RXFCS))) + pskb_trim(skb, skb->len - 4); + total_rx_packets++; + + if (status & E1000_RXD_STAT_VP) { + __le16 vlan = rx_desc->special; + u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK; + + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); + } + + napi_gro_frags(&adapter->napi); + +next_desc: + rx_desc->status = 0; + + /* return some buffers to hardware, one at a time is too slow */ + if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { + adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); + cleaned_count = 0; + } + + /* use prefetched values */ + rx_desc = next_rxd; + buffer_info = next_buffer; + } + rx_ring->next_to_clean = i; + + cleaned_count = E1000_DESC_UNUSED(rx_ring); + if (cleaned_count) + adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); + + adapter->total_rx_packets += total_rx_packets; + adapter->total_rx_bytes += total_rx_bytes; + netdev->stats.rx_bytes += total_rx_bytes; + netdev->stats.rx_packets += total_rx_packets; + return cleaned; +} + +/* this should improve performance for small packets with large amounts + * of reassembly being done in the stack + */ +static struct sk_buff *e1000_copybreak(struct e1000_adapter *adapter, + struct e1000_rx_buffer *buffer_info, + u32 length, const void *data) +{ + struct sk_buff *skb; + + if (length > copybreak) + return NULL; + + skb = e1000_alloc_rx_skb(adapter, length); + if (!skb) + return NULL; + + dma_sync_single_for_cpu(&adapter->pdev->dev, buffer_info->dma, + length, DMA_FROM_DEVICE); + + skb_put_data(skb, data, length); + + return skb; +} + +/** + * e1000_clean_rx_irq - Send received data up the network stack; legacy + * @adapter: board private structure + * @rx_ring: ring to clean + * @work_done: amount of napi work completed this call + * @work_to_do: max amount of work allowed for this call to do + */ +static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring, + int *work_done, int work_to_do) +{ + struct net_device *netdev = adapter->netdev; + struct pci_dev *pdev = adapter->pdev; + struct e1000_rx_desc *rx_desc, *next_rxd; + struct e1000_rx_buffer *buffer_info, *next_buffer; + u32 length; + unsigned int i; + int cleaned_count = 0; + bool cleaned = false; + unsigned int total_rx_bytes = 0, total_rx_packets = 0; + + i = rx_ring->next_to_clean; + rx_desc = E1000_RX_DESC(*rx_ring, i); + buffer_info = &rx_ring->buffer_info[i]; + + while (rx_desc->status & E1000_RXD_STAT_DD) { + struct sk_buff *skb; + u8 *data; + u8 status; + + if (*work_done >= work_to_do) + break; + (*work_done)++; + dma_rmb(); /* read descriptor and rx_buffer_info after status DD */ + + status = rx_desc->status; + length = le16_to_cpu(rx_desc->length); + + data = buffer_info->rxbuf.data; + prefetch(data); + skb = e1000_copybreak(adapter, buffer_info, length, data); + if (!skb) { + unsigned int frag_len = e1000_frag_len(adapter); + + skb = napi_build_skb(data - E1000_HEADROOM, frag_len); + if (!skb) { + adapter->alloc_rx_buff_failed++; + break; + } + + skb_reserve(skb, E1000_HEADROOM); + dma_unmap_single(&pdev->dev, buffer_info->dma, + adapter->rx_buffer_len, + DMA_FROM_DEVICE); + buffer_info->dma = 0; + buffer_info->rxbuf.data = NULL; + } + + if (++i == rx_ring->count) + i = 0; + + next_rxd = E1000_RX_DESC(*rx_ring, i); + prefetch(next_rxd); + + next_buffer = &rx_ring->buffer_info[i]; + + cleaned = true; + cleaned_count++; + + /* !EOP means multiple descriptors were used to store a single + * packet, if thats the case we need to toss it. In fact, we + * to toss every packet with the EOP bit clear and the next + * frame that _does_ have the EOP bit set, as it is by + * definition only a frame fragment + */ + if (unlikely(!(status & E1000_RXD_STAT_EOP))) + adapter->discarding = true; + + if (adapter->discarding) { + /* All receives must fit into a single buffer */ + netdev_dbg(netdev, "Receive packet consumed multiple buffers\n"); + dev_kfree_skb(skb); + if (status & E1000_RXD_STAT_EOP) + adapter->discarding = false; + goto next_desc; + } + + if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) { + if (e1000_tbi_should_accept(adapter, status, + rx_desc->errors, + length, data)) { + length--; + } else if (netdev->features & NETIF_F_RXALL) { + goto process_skb; + } else { + dev_kfree_skb(skb); + goto next_desc; + } + } + +process_skb: + total_rx_bytes += (length - 4); /* don't count FCS */ + total_rx_packets++; + + if (likely(!(netdev->features & NETIF_F_RXFCS))) + /* adjust length to remove Ethernet CRC, this must be + * done after the TBI_ACCEPT workaround above + */ + length -= 4; + + if (buffer_info->rxbuf.data == NULL) + skb_put(skb, length); + else /* copybreak skb */ + skb_trim(skb, length); + + /* Receive Checksum Offload */ + e1000_rx_checksum(adapter, + (u32)(status) | + ((u32)(rx_desc->errors) << 24), + le16_to_cpu(rx_desc->csum), skb); + + e1000_receive_skb(adapter, status, rx_desc->special, skb); + +next_desc: + rx_desc->status = 0; + + /* return some buffers to hardware, one at a time is too slow */ + if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { + adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); + cleaned_count = 0; + } + + /* use prefetched values */ + rx_desc = next_rxd; + buffer_info = next_buffer; + } + rx_ring->next_to_clean = i; + + cleaned_count = E1000_DESC_UNUSED(rx_ring); + if (cleaned_count) + adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); + + adapter->total_rx_packets += total_rx_packets; + adapter->total_rx_bytes += total_rx_bytes; + netdev->stats.rx_bytes += total_rx_bytes; + netdev->stats.rx_packets += total_rx_packets; + return cleaned; +} + +/** + * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers + * @adapter: address of board private structure + * @rx_ring: pointer to receive ring structure + * @cleaned_count: number of buffers to allocate this pass + **/ +static void +e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring, int cleaned_count) +{ + struct pci_dev *pdev = adapter->pdev; + struct e1000_rx_desc *rx_desc; + struct e1000_rx_buffer *buffer_info; + unsigned int i; + + i = rx_ring->next_to_use; + buffer_info = &rx_ring->buffer_info[i]; + + while (cleaned_count--) { + /* allocate a new page if necessary */ + if (!buffer_info->rxbuf.page) { + buffer_info->rxbuf.page = alloc_page(GFP_ATOMIC); + if (unlikely(!buffer_info->rxbuf.page)) { + adapter->alloc_rx_buff_failed++; + break; + } + } + + if (!buffer_info->dma) { + buffer_info->dma = dma_map_page(&pdev->dev, + buffer_info->rxbuf.page, 0, + adapter->rx_buffer_len, + DMA_FROM_DEVICE); + if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { + put_page(buffer_info->rxbuf.page); + buffer_info->rxbuf.page = NULL; + buffer_info->dma = 0; + adapter->alloc_rx_buff_failed++; + break; + } + } + + rx_desc = E1000_RX_DESC(*rx_ring, i); + rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); + + if (unlikely(++i == rx_ring->count)) + i = 0; + buffer_info = &rx_ring->buffer_info[i]; + } + + if (likely(rx_ring->next_to_use != i)) { + rx_ring->next_to_use = i; + if (unlikely(i-- == 0)) + i = (rx_ring->count - 1); + + /* 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). + */ + dma_wmb(); + writel(i, adapter->hw.hw_addr + rx_ring->rdt); + } +} + +/** + * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended + * @adapter: address of board private structure + * @rx_ring: pointer to ring struct + * @cleaned_count: number of new Rx buffers to try to allocate + **/ +static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring, + int cleaned_count) +{ + struct e1000_hw *hw = &adapter->hw; + struct pci_dev *pdev = adapter->pdev; + struct e1000_rx_desc *rx_desc; + struct e1000_rx_buffer *buffer_info; + unsigned int i; + unsigned int bufsz = adapter->rx_buffer_len; + + i = rx_ring->next_to_use; + buffer_info = &rx_ring->buffer_info[i]; + + while (cleaned_count--) { + void *data; + + if (buffer_info->rxbuf.data) + goto skip; + + data = e1000_alloc_frag(adapter); + if (!data) { + /* Better luck next round */ + adapter->alloc_rx_buff_failed++; + break; + } + + /* Fix for errata 23, can't cross 64kB boundary */ + if (!e1000_check_64k_bound(adapter, data, bufsz)) { + void *olddata = data; + e_err(rx_err, "skb align check failed: %u bytes at " + "%p\n", bufsz, data); + /* Try again, without freeing the previous */ + data = e1000_alloc_frag(adapter); + /* Failed allocation, critical failure */ + if (!data) { + skb_free_frag(olddata); + adapter->alloc_rx_buff_failed++; + break; + } + + if (!e1000_check_64k_bound(adapter, data, bufsz)) { + /* give up */ + skb_free_frag(data); + skb_free_frag(olddata); + adapter->alloc_rx_buff_failed++; + break; + } + + /* Use new allocation */ + skb_free_frag(olddata); + } + buffer_info->dma = dma_map_single(&pdev->dev, + data, + adapter->rx_buffer_len, + DMA_FROM_DEVICE); + if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { + skb_free_frag(data); + buffer_info->dma = 0; + adapter->alloc_rx_buff_failed++; + break; + } + + /* XXX if it was allocated cleanly it will never map to a + * boundary crossing + */ + + /* Fix for errata 23, can't cross 64kB boundary */ + if (!e1000_check_64k_bound(adapter, + (void *)(unsigned long)buffer_info->dma, + adapter->rx_buffer_len)) { + e_err(rx_err, "dma align check failed: %u bytes at " + "%p\n", adapter->rx_buffer_len, + (void *)(unsigned long)buffer_info->dma); + + dma_unmap_single(&pdev->dev, buffer_info->dma, + adapter->rx_buffer_len, + DMA_FROM_DEVICE); + + skb_free_frag(data); + buffer_info->rxbuf.data = NULL; + buffer_info->dma = 0; + + adapter->alloc_rx_buff_failed++; + break; + } + buffer_info->rxbuf.data = data; + skip: + rx_desc = E1000_RX_DESC(*rx_ring, i); + rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); + + if (unlikely(++i == rx_ring->count)) + i = 0; + buffer_info = &rx_ring->buffer_info[i]; + } + + if (likely(rx_ring->next_to_use != i)) { + rx_ring->next_to_use = i; + if (unlikely(i-- == 0)) + i = (rx_ring->count - 1); + + /* 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). + */ + dma_wmb(); + writel(i, hw->hw_addr + rx_ring->rdt); + } +} + +/** + * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers. + * @adapter: address of board private structure + **/ +static void e1000_smartspeed(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + u16 phy_status; + u16 phy_ctrl; + + if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg || + !(hw->autoneg_advertised & ADVERTISE_1000_FULL)) + return; + + if (adapter->smartspeed == 0) { + /* If Master/Slave config fault is asserted twice, + * we assume back-to-back + */ + e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status); + if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) + return; + e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status); + if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) + return; + e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl); + if (phy_ctrl & CR_1000T_MS_ENABLE) { + phy_ctrl &= ~CR_1000T_MS_ENABLE; + e1000_write_phy_reg(hw, PHY_1000T_CTRL, + phy_ctrl); + adapter->smartspeed++; + if (!e1000_phy_setup_autoneg(hw) && + !e1000_read_phy_reg(hw, PHY_CTRL, + &phy_ctrl)) { + phy_ctrl |= (MII_CR_AUTO_NEG_EN | + MII_CR_RESTART_AUTO_NEG); + e1000_write_phy_reg(hw, PHY_CTRL, + phy_ctrl); + } + } + return; + } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) { + /* If still no link, perhaps using 2/3 pair cable */ + e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl); + phy_ctrl |= CR_1000T_MS_ENABLE; + e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl); + if (!e1000_phy_setup_autoneg(hw) && + !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) { + phy_ctrl |= (MII_CR_AUTO_NEG_EN | + MII_CR_RESTART_AUTO_NEG); + e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl); + } + } + /* Restart process after E1000_SMARTSPEED_MAX iterations */ + if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX) + adapter->smartspeed = 0; +} + +/** + * e1000_ioctl - handle ioctl calls + * @netdev: pointer to our netdev + * @ifr: pointer to interface request structure + * @cmd: ioctl data + **/ +static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) +{ + switch (cmd) { + case SIOCGMIIPHY: + case SIOCGMIIREG: + case SIOCSMIIREG: + return e1000_mii_ioctl(netdev, ifr, cmd); + default: + return -EOPNOTSUPP; + } +} + +/** + * e1000_mii_ioctl - + * @netdev: pointer to our netdev + * @ifr: pointer to interface request structure + * @cmd: ioctl data + **/ +static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, + int cmd) +{ + struct e1000_adapter *adapter = netdev_priv(netdev); + struct e1000_hw *hw = &adapter->hw; + struct mii_ioctl_data *data = if_mii(ifr); + int retval; + u16 mii_reg; + unsigned long flags; + + if (hw->media_type != e1000_media_type_copper) + return -EOPNOTSUPP; + + switch (cmd) { + case SIOCGMIIPHY: + data->phy_id = hw->phy_addr; + break; + case SIOCGMIIREG: + spin_lock_irqsave(&adapter->stats_lock, flags); + if (e1000_read_phy_reg(hw, data->reg_num & 0x1F, + &data->val_out)) { + spin_unlock_irqrestore(&adapter->stats_lock, flags); + return -EIO; + } + spin_unlock_irqrestore(&adapter->stats_lock, flags); + break; + case SIOCSMIIREG: + if (data->reg_num & ~(0x1F)) + return -EFAULT; + mii_reg = data->val_in; + spin_lock_irqsave(&adapter->stats_lock, flags); + if (e1000_write_phy_reg(hw, data->reg_num, + mii_reg)) { + spin_unlock_irqrestore(&adapter->stats_lock, flags); + return -EIO; + } + spin_unlock_irqrestore(&adapter->stats_lock, flags); + if (hw->media_type == e1000_media_type_copper) { + switch (data->reg_num) { + case PHY_CTRL: + if (mii_reg & MII_CR_POWER_DOWN) + break; + if (mii_reg & MII_CR_AUTO_NEG_EN) { + hw->autoneg = 1; + hw->autoneg_advertised = 0x2F; + } else { + u32 speed; + if (mii_reg & 0x40) + speed = SPEED_1000; + else if (mii_reg & 0x2000) + speed = SPEED_100; + else + speed = SPEED_10; + retval = e1000_set_spd_dplx( + adapter, speed, + ((mii_reg & 0x100) + ? DUPLEX_FULL : + DUPLEX_HALF)); + if (retval) + return retval; + } + if (netif_running(adapter->netdev)) + e1000_reinit_locked(adapter); + else + e1000_reset(adapter); + break; + case M88E1000_PHY_SPEC_CTRL: + case M88E1000_EXT_PHY_SPEC_CTRL: + if (e1000_phy_reset(hw)) + return -EIO; + break; + } + } else { + switch (data->reg_num) { + case PHY_CTRL: + if (mii_reg & MII_CR_POWER_DOWN) + break; + if (netif_running(adapter->netdev)) + e1000_reinit_locked(adapter); + else + e1000_reset(adapter); + break; + } + } + break; + default: + return -EOPNOTSUPP; + } + return E1000_SUCCESS; +} + +void e1000_pci_set_mwi(struct e1000_hw *hw) +{ + struct e1000_adapter *adapter = hw->back; + int ret_val = pci_set_mwi(adapter->pdev); + + if (ret_val) + e_err(probe, "Error in setting MWI\n"); +} + +void e1000_pci_clear_mwi(struct e1000_hw *hw) +{ + struct e1000_adapter *adapter = hw->back; + + pci_clear_mwi(adapter->pdev); +} + +int e1000_pcix_get_mmrbc(struct e1000_hw *hw) +{ + struct e1000_adapter *adapter = hw->back; + return pcix_get_mmrbc(adapter->pdev); +} + +void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc) +{ + struct e1000_adapter *adapter = hw->back; + pcix_set_mmrbc(adapter->pdev, mmrbc); +} + +void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value) +{ + outl(value, port); +} + +static bool e1000_vlan_used(struct e1000_adapter *adapter) +{ + u16 vid; + + for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) + return true; + return false; +} + +static void __e1000_vlan_mode(struct e1000_adapter *adapter, + netdev_features_t features) +{ + struct e1000_hw *hw = &adapter->hw; + u32 ctrl; + + ctrl = er32(CTRL); + if (features & NETIF_F_HW_VLAN_CTAG_RX) { + /* enable VLAN tag insert/strip */ + ctrl |= E1000_CTRL_VME; + } else { + /* disable VLAN tag insert/strip */ + ctrl &= ~E1000_CTRL_VME; + } + ew32(CTRL, ctrl); +} +static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter, + bool filter_on) +{ + struct e1000_hw *hw = &adapter->hw; + u32 rctl; + + if (!test_bit(__E1000_DOWN, &adapter->flags)) + e1000_irq_disable(adapter); + + __e1000_vlan_mode(adapter, adapter->netdev->features); + if (filter_on) { + /* enable VLAN receive filtering */ + rctl = er32(RCTL); + rctl &= ~E1000_RCTL_CFIEN; + if (!(adapter->netdev->flags & IFF_PROMISC)) + rctl |= E1000_RCTL_VFE; + ew32(RCTL, rctl); + e1000_update_mng_vlan(adapter); + } else { + /* disable VLAN receive filtering */ + rctl = er32(RCTL); + rctl &= ~E1000_RCTL_VFE; + ew32(RCTL, rctl); + } + + if (!test_bit(__E1000_DOWN, &adapter->flags)) + e1000_irq_enable(adapter); +} + +static void e1000_vlan_mode(struct net_device *netdev, + netdev_features_t features) +{ + struct e1000_adapter *adapter = netdev_priv(netdev); + + if (!test_bit(__E1000_DOWN, &adapter->flags)) + e1000_irq_disable(adapter); + + __e1000_vlan_mode(adapter, features); + + if (!test_bit(__E1000_DOWN, &adapter->flags)) + e1000_irq_enable(adapter); +} + +static int e1000_vlan_rx_add_vid(struct net_device *netdev, + __be16 proto, u16 vid) +{ + struct e1000_adapter *adapter = netdev_priv(netdev); + struct e1000_hw *hw = &adapter->hw; + u32 vfta, index; + + if ((hw->mng_cookie.status & + E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) && + (vid == adapter->mng_vlan_id)) + return 0; + + if (!e1000_vlan_used(adapter)) + e1000_vlan_filter_on_off(adapter, true); + + /* add VID to filter table */ + index = (vid >> 5) & 0x7F; + vfta = E1000_READ_REG_ARRAY(hw, VFTA, index); + vfta |= (1 << (vid & 0x1F)); + e1000_write_vfta(hw, index, vfta); + + set_bit(vid, adapter->active_vlans); + + return 0; +} + +static int e1000_vlan_rx_kill_vid(struct net_device *netdev, + __be16 proto, u16 vid) +{ + struct e1000_adapter *adapter = netdev_priv(netdev); + struct e1000_hw *hw = &adapter->hw; + u32 vfta, index; + + if (!test_bit(__E1000_DOWN, &adapter->flags)) + e1000_irq_disable(adapter); + if (!test_bit(__E1000_DOWN, &adapter->flags)) + e1000_irq_enable(adapter); + + /* remove VID from filter table */ + index = (vid >> 5) & 0x7F; + vfta = E1000_READ_REG_ARRAY(hw, VFTA, index); + vfta &= ~(1 << (vid & 0x1F)); + e1000_write_vfta(hw, index, vfta); + + clear_bit(vid, adapter->active_vlans); + + if (!e1000_vlan_used(adapter)) + e1000_vlan_filter_on_off(adapter, false); + + return 0; +} + +static void e1000_restore_vlan(struct e1000_adapter *adapter) +{ + u16 vid; + + if (!e1000_vlan_used(adapter)) + return; + + e1000_vlan_filter_on_off(adapter, true); + for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) + e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid); +} + +int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx) +{ + struct e1000_hw *hw = &adapter->hw; + + hw->autoneg = 0; + + /* Make sure dplx is at most 1 bit and lsb of speed is not set + * for the switch() below to work + */ + if ((spd & 1) || (dplx & ~1)) + goto err_inval; + + /* Fiber NICs only allow 1000 gbps Full duplex */ + if ((hw->media_type == e1000_media_type_fiber) && + spd != SPEED_1000 && + dplx != DUPLEX_FULL) + goto err_inval; + + switch (spd + dplx) { + case SPEED_10 + DUPLEX_HALF: + hw->forced_speed_duplex = e1000_10_half; + break; + case SPEED_10 + DUPLEX_FULL: + hw->forced_speed_duplex = e1000_10_full; + break; + case SPEED_100 + DUPLEX_HALF: + hw->forced_speed_duplex = e1000_100_half; + break; + case SPEED_100 + DUPLEX_FULL: + hw->forced_speed_duplex = e1000_100_full; + break; + case SPEED_1000 + DUPLEX_FULL: + hw->autoneg = 1; + hw->autoneg_advertised = ADVERTISE_1000_FULL; + break; + case SPEED_1000 + DUPLEX_HALF: /* not supported */ + default: + goto err_inval; + } + + /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */ + hw->mdix = AUTO_ALL_MODES; + + return 0; + +err_inval: + e_err(probe, "Unsupported Speed/Duplex configuration\n"); + return -EINVAL; +} + +static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct e1000_adapter *adapter = netdev_priv(netdev); + struct e1000_hw *hw = &adapter->hw; + u32 ctrl, ctrl_ext, rctl, status; + u32 wufc = adapter->wol; + + netif_device_detach(netdev); + + if (netif_running(netdev)) { + int count = E1000_CHECK_RESET_COUNT; + + while (test_bit(__E1000_RESETTING, &adapter->flags) && count--) + usleep_range(10000, 20000); + + WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags)); + e1000_down(adapter); + } + + status = er32(STATUS); + if (status & E1000_STATUS_LU) + wufc &= ~E1000_WUFC_LNKC; + + if (wufc) { + e1000_setup_rctl(adapter); + e1000_set_rx_mode(netdev); + + rctl = er32(RCTL); + + /* turn on all-multi mode if wake on multicast is enabled */ + if (wufc & E1000_WUFC_MC) + rctl |= E1000_RCTL_MPE; + + /* enable receives in the hardware */ + ew32(RCTL, rctl | E1000_RCTL_EN); + + if (hw->mac_type >= e1000_82540) { + ctrl = er32(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 | + E1000_CTRL_EN_PHY_PWR_MGMT; + ew32(CTRL, ctrl); + } + + if (hw->media_type == e1000_media_type_fiber || + hw->media_type == e1000_media_type_internal_serdes) { + /* keep the laser running in D3 */ + ctrl_ext = er32(CTRL_EXT); + ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA; + ew32(CTRL_EXT, ctrl_ext); + } + + ew32(WUC, E1000_WUC_PME_EN); + ew32(WUFC, wufc); + } else { + ew32(WUC, 0); + ew32(WUFC, 0); + } + + e1000_release_manageability(adapter); + + *enable_wake = !!wufc; + + /* make sure adapter isn't asleep if manageability is enabled */ + if (adapter->en_mng_pt) + *enable_wake = true; + + if (netif_running(netdev)) + e1000_free_irq(adapter); + + if (!test_and_set_bit(__E1000_DISABLED, &adapter->flags)) + pci_disable_device(pdev); + + return 0; +} + +static int __maybe_unused e1000_suspend(struct device *dev) +{ + int retval; + struct pci_dev *pdev = to_pci_dev(dev); + bool wake; + + retval = __e1000_shutdown(pdev, &wake); + device_set_wakeup_enable(dev, wake); + + return retval; +} + +static int __maybe_unused e1000_resume(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct net_device *netdev = pci_get_drvdata(pdev); + struct e1000_adapter *adapter = netdev_priv(netdev); + struct e1000_hw *hw = &adapter->hw; + u32 err; + + if (adapter->need_ioport) + err = pci_enable_device(pdev); + else + err = pci_enable_device_mem(pdev); + if (err) { + pr_err("Cannot enable PCI device from suspend\n"); + return err; + } + + /* flush memory to make sure state is correct */ + smp_mb__before_atomic(); + clear_bit(__E1000_DISABLED, &adapter->flags); + pci_set_master(pdev); + + pci_enable_wake(pdev, PCI_D3hot, 0); + pci_enable_wake(pdev, PCI_D3cold, 0); + + if (netif_running(netdev)) { + err = e1000_request_irq(adapter); + if (err) + return err; + } + + e1000_power_up_phy(adapter); + e1000_reset(adapter); + ew32(WUS, ~0); + + e1000_init_manageability(adapter); + + if (netif_running(netdev)) + e1000_up(adapter); + + netif_device_attach(netdev); + + return 0; +} + +static void e1000_shutdown(struct pci_dev *pdev) +{ + bool wake; + + __e1000_shutdown(pdev, &wake); + + if (system_state == SYSTEM_POWER_OFF) { + pci_wake_from_d3(pdev, wake); + pci_set_power_state(pdev, PCI_D3hot); + } +} + +#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 e1000_netpoll(struct net_device *netdev) +{ + struct e1000_adapter *adapter = netdev_priv(netdev); + + if (disable_hardirq(adapter->pdev->irq)) + e1000_intr(adapter->pdev->irq, netdev); + enable_irq(adapter->pdev->irq); +} +#endif + +/** + * e1000_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 e1000_io_error_detected(struct pci_dev *pdev, + pci_channel_state_t state) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct e1000_adapter *adapter = netdev_priv(netdev); + + netif_device_detach(netdev); + + if (state == pci_channel_io_perm_failure) + return PCI_ERS_RESULT_DISCONNECT; + + if (netif_running(netdev)) + e1000_down(adapter); + + if (!test_and_set_bit(__E1000_DISABLED, &adapter->flags)) + pci_disable_device(pdev); + + /* Request a slot reset. */ + return PCI_ERS_RESULT_NEED_RESET; +} + +/** + * e1000_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 e1000_resume routine. + */ +static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct e1000_adapter *adapter = netdev_priv(netdev); + struct e1000_hw *hw = &adapter->hw; + int err; + + if (adapter->need_ioport) + err = pci_enable_device(pdev); + else + err = pci_enable_device_mem(pdev); + if (err) { + pr_err("Cannot re-enable PCI device after reset.\n"); + return PCI_ERS_RESULT_DISCONNECT; + } + + /* flush memory to make sure state is correct */ + smp_mb__before_atomic(); + clear_bit(__E1000_DISABLED, &adapter->flags); + pci_set_master(pdev); + + pci_enable_wake(pdev, PCI_D3hot, 0); + pci_enable_wake(pdev, PCI_D3cold, 0); + + e1000_reset(adapter); + ew32(WUS, ~0); + + return PCI_ERS_RESULT_RECOVERED; +} + +/** + * e1000_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 e1000_resume routine. + */ +static void e1000_io_resume(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct e1000_adapter *adapter = netdev_priv(netdev); + + e1000_init_manageability(adapter); + + if (netif_running(netdev)) { + if (e1000_up(adapter)) { + pr_info("can't bring device back up after reset\n"); + return; + } + } + + netif_device_attach(netdev); +} + +/* e1000_main.c */ |