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Diffstat (limited to 'drivers/net/ethernet/intel/e1000/e1000_main.c')
-rw-r--r--drivers/net/ethernet/intel/e1000/e1000_main.c5316
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 */