diff options
| author | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-04-07 07:42:33 -0700 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-08-10 20:03:27 -0700 |
| commit | dee1ad47f2ee75f5146d83ca757c1b7861c34c3b (patch) | |
| tree | 47cbdefe3d0f9b729724e378ad6a96eaddfd5fbc /drivers/net/e1000/e1000_main.c | |
| parent | f7917c009c28c941ba151ee66f04dc7f6a2e1e0b (diff) | |
| download | linux-dee1ad47f2ee75f5146d83ca757c1b7861c34c3b.tar.bz2 | |
intel: Move the Intel wired LAN drivers
Moves the Intel wired LAN drivers into drivers/net/ethernet/intel/ and
the necessary Kconfig and Makefile changes.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/e1000/e1000_main.c')
| -rw-r--r-- | drivers/net/e1000/e1000_main.c | 4974 |
1 files changed, 0 insertions, 4974 deletions
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c deleted file mode 100644 index f97afda941d7..000000000000 --- a/drivers/net/e1000/e1000_main.c +++ /dev/null @@ -1,4974 +0,0 @@ -/******************************************************************************* - - Intel PRO/1000 Linux driver - Copyright(c) 1999 - 2006 Intel Corporation. - - This program is free software; you can redistribute it and/or modify it - under the terms and conditions of the GNU General Public License, - version 2, as published by the Free Software Foundation. - - This program is distributed in the hope it will be useful, but WITHOUT - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - more details. - - You should have received a copy of the GNU General Public License along with - this program; if not, write to the Free Software Foundation, Inc., - 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - - The full GNU General Public License is included in this distribution in - the file called "COPYING". - - Contact Information: - Linux NICS <linux.nics@intel.com> - e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> - Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - -*******************************************************************************/ - -#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> - -/* Intel Media SOC GbE MDIO physical base address */ -static unsigned long ce4100_gbe_mdio_base_phy; -/* Intel Media SOC GbE MDIO virtual base address */ -void __iomem *ce4100_gbe_mdio_base_virt; - -char e1000_driver_name[] = "e1000"; -static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver"; -#define DRV_VERSION "7.3.21-k8-NAPI" -const char e1000_driver_version[] = DRV_VERSION; -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 DEFINE_PCI_DEVICE_TABLE(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 __devexit e1000_remove(struct pci_dev *pdev); -static int e1000_alloc_queues(struct e1000_adapter *adapter); -static int e1000_sw_init(struct e1000_adapter *adapter); -static int e1000_open(struct net_device *netdev); -static 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(unsigned long data); -static void e1000_update_phy_info_task(struct work_struct *work); -static void e1000_watchdog(unsigned long data); -static void e1000_82547_tx_fifo_stall(unsigned long data); -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 struct net_device_stats * e1000_get_stats(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_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); -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, u32 features); -static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid); -static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid); -static void e1000_restore_vlan(struct e1000_adapter *adapter); - -#ifdef CONFIG_PM -static int e1000_suspend(struct pci_dev *pdev, pm_message_t state); -static int e1000_resume(struct pci_dev *pdev); -#endif -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 struct pci_error_handlers e1000_err_handler = { - .error_detected = e1000_io_error_detected, - .slot_reset = e1000_io_slot_reset, - .resume = e1000_io_resume, -}; - -static struct pci_driver e1000_driver = { - .name = e1000_driver_name, - .id_table = e1000_pci_tbl, - .probe = e1000_probe, - .remove = __devexit_p(e1000_remove), -#ifdef CONFIG_PM - /* Power Management Hooks */ - .suspend = e1000_suspend, - .resume = e1000_resume, -#endif - .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"); -MODULE_VERSION(DRV_VERSION); - -static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE; -module_param(debug, int, 0); -MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); - -/** - * e1000_get_hw_dev - 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 - version %s\n", e1000_driver_string, e1000_driver_version); - - 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, 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, 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); - mdelay(1); - } -out: - return; -} - -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); - - napi_disable(&adapter->napi); - - e1000_irq_disable(adapter); - - /* - * Setting DOWN must be after irq_disable to prevent - * a screaming interrupt. Setting DOWN also prevents - * timers and tasks from rescheduling. - */ - set_bit(__E1000_DOWN, &adapter->flags); - - del_timer_sync(&adapter->tx_fifo_stall_timer); - del_timer_sync(&adapter->watchdog_timer); - del_timer_sync(&adapter->phy_info_timer); - - adapter->link_speed = 0; - adapter->link_duplex = 0; - netif_carrier_off(netdev); - - e1000_reset(adapter); - e1000_clean_all_tx_rings(adapter); - e1000_clean_all_rx_rings(adapter); -} - -static void e1000_reinit_safe(struct e1000_adapter *adapter) -{ - while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) - msleep(1); - rtnl_lock(); - e1000_down(adapter); - e1000_up(adapter); - rtnl_unlock(); - clear_bit(__E1000_RESETTING, &adapter->flags); -} - -void e1000_reinit_locked(struct e1000_adapter *adapter) -{ - /* if rtnl_lock is not held the call path is bogus */ - ASSERT_RTNL(); - WARN_ON(in_interrupt()); - while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) - msleep(1); - 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) { - pr_err("Unable to allocate memory to dump EEPROM data\n"); - 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 u32 e1000_fix_features(struct net_device *netdev, u32 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_RX) - features |= NETIF_F_HW_VLAN_TX; - else - features &= ~NETIF_F_HW_VLAN_TX; - - return features; -} - -static int e1000_set_features(struct net_device *netdev, u32 features) -{ - struct e1000_adapter *adapter = netdev_priv(netdev); - u32 changed = features ^ netdev->features; - - if (changed & NETIF_F_HW_VLAN_RX) - e1000_vlan_mode(netdev, features); - - if (!(changed & NETIF_F_RXCSUM)) - return 0; - - adapter->rx_csum = !!(features & NETIF_F_RXCSUM); - - if (netif_running(netdev)) - e1000_reinit_locked(adapter); - else - e1000_reset(adapter); - - return 0; -} - -static const struct net_device_ops e1000_netdev_ops = { - .ndo_open = e1000_open, - .ndo_stop = e1000_close, - .ndo_start_xmit = e1000_xmit_frame, - .ndo_get_stats = e1000_get_stats, - .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_do_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 __devinit e1000_probe(struct pci_dev *pdev, - const struct pci_device_id *ent) -{ - struct net_device *netdev; - struct e1000_adapter *adapter; - struct e1000_hw *hw; - - static int cards_found = 0; - static int global_quad_port_a = 0; /* 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; - - /* 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 = (1 << debug) - 1; - 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 <= BAR_5; 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(&pdev->dev, DMA_BIT_MASK(64))) { - /* - * according to DMA-API-HOWTO, coherent calls will always - * succeed if the set call did - */ - dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); - pci_using_dac = 1; - } else { - err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); - if (err) { - pr_err("No usable DMA config, aborting\n"); - goto err_dma; - } - dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); - } - - netdev->netdev_ops = &e1000_netdev_ops; - e1000_set_ethtool_ops(netdev); - netdev->watchdog_timeo = 5 * HZ; - netif_napi_add(netdev, &adapter->napi, e1000_clean, 64); - - 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) { - ce4100_gbe_mdio_base_phy = pci_resource_start(pdev, BAR_1); - ce4100_gbe_mdio_base_virt = ioremap(ce4100_gbe_mdio_base_phy, - pci_resource_len(pdev, BAR_1)); - - if (!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_RX; - netdev->features = NETIF_F_HW_VLAN_TX | - NETIF_F_HW_VLAN_FILTER; - } - - if ((hw->mac_type >= e1000_82544) && - (hw->mac_type != e1000_82547)) - netdev->hw_features |= NETIF_F_TSO; - - netdev->features |= netdev->hw_features; - netdev->hw_features |= NETIF_F_RXCSUM; - - if (pci_using_dac) { - netdev->features |= NETIF_F_HIGHDMA; - netdev->vlan_features |= NETIF_F_HIGHDMA; - } - - netdev->vlan_features |= NETIF_F_TSO; - netdev->vlan_features |= NETIF_F_HW_CSUM; - netdev->vlan_features |= NETIF_F_SG; - - 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 initalization here due to bad MAC address */ - memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len); - memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len); - - if (!is_valid_ether_addr(netdev->perm_addr)) - e_err(probe, "Invalid MAC Address\n"); - - init_timer(&adapter->tx_fifo_stall_timer); - adapter->tx_fifo_stall_timer.function = e1000_82547_tx_fifo_stall; - adapter->tx_fifo_stall_timer.data = (unsigned long)adapter; - - init_timer(&adapter->watchdog_timer); - adapter->watchdog_timer.function = e1000_watchdog; - adapter->watchdog_timer.data = (unsigned long) adapter; - - init_timer(&adapter->phy_info_timer); - adapter->phy_info_timer.function = e1000_update_phy_info; - adapter->phy_info_timer.data = (unsigned long)adapter; - - INIT_WORK(&adapter->fifo_stall_task, e1000_82547_tx_fifo_stall_task); - INIT_WORK(&adapter->reset_task, e1000_reset_task); - INIT_WORK(&adapter->phy_info_task, e1000_update_phy_info_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; - } - /* Fall Through */ - 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 = 1; - /* 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) { - if (i == 31) - goto err_eeprom; - continue; - } else - break; - } - } - - /* 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_mode(netdev, netdev->features); - - /* 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(ce4100_gbe_mdio_base_virt); - iounmap(hw->hw_addr); -err_ioremap: - free_netdev(netdev); -err_alloc_etherdev: - pci_release_selected_regions(pdev, bars); -err_pci_reg: - 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. The could be caused by a - * Hot-Plug event, or because the driver is going to be removed from - * memory. - **/ - -static void __devexit 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; - - set_bit(__E1000_DOWN, &adapter->flags); - del_timer_sync(&adapter->tx_fifo_stall_timer); - del_timer_sync(&adapter->watchdog_timer); - del_timer_sync(&adapter->phy_info_timer); - - cancel_work_sync(&adapter->reset_task); - - e1000_release_manageability(adapter); - - unregister_netdev(netdev); - - e1000_phy_hw_reset(hw); - - kfree(adapter->tx_ring); - kfree(adapter->rx_ring); - - iounmap(hw->hw_addr); - if (hw->flash_address) - iounmap(hw->flash_address); - pci_release_selected_regions(pdev, adapter->bars); - - free_netdev(netdev); - - 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 __devinit 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 __devinit 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 timer is started, - * and the stack is notified that the interface is ready. - **/ - -static 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. - **/ - -static int e1000_close(struct net_device *netdev) -{ - struct e1000_adapter *adapter = netdev_priv(netdev); - struct e1000_hw *hw = &adapter->hw; - - WARN_ON(test_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, 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 ? false : true; - } - - 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_buffer) * txdr->count; - txdr->buffer_info = vzalloc(size); - if (!txdr->buffer_info) { - e_err(probe, "Unable to allocate memory for the Tx descriptor " - "ring\n"); - 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); - e_err(probe, "Unable to allocate memory for the Tx descriptor " - "ring\n"); - 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 = 1; - - 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_buffer) * rxdr->count; - rxdr->buffer_info = vzalloc(size); - if (!rxdr->buffer_info) { - e_err(probe, "Unable to allocate memory for the Rx descriptor " - "ring\n"); - 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) { - e_err(probe, "Unable to allocate memory for the Rx descriptor " - "ring\n"); -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); - e_err(probe, "Unable to allocate memory for the Rx " - "descriptor ring\n"); - 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_EN | 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; - } - - 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_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_buffer *buffer_info) -{ - 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) { - dev_kfree_skb_any(buffer_info->skb); - buffer_info->skb = NULL; - } - buffer_info->time_stamp = 0; - /* buffer_info must be completely set up in the transmit path */ -} - -/** - * 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_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); - } - - size = sizeof(struct e1000_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 = 0; - - 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]); -} - -/** - * 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_buffer *buffer_info; - struct pci_dev *pdev = adapter->pdev; - unsigned long size; - unsigned int i; - - /* Free all the Rx ring sk_buffs */ - for (i = 0; i < rx_ring->count; i++) { - buffer_info = &rx_ring->buffer_info[i]; - if (buffer_info->dma && - adapter->clean_rx == e1000_clean_rx_irq) { - dma_unmap_single(&pdev->dev, buffer_info->dma, - buffer_info->length, - DMA_FROM_DEVICE); - } else if (buffer_info->dma && - adapter->clean_rx == e1000_clean_jumbo_rx_irq) { - dma_unmap_page(&pdev->dev, buffer_info->dma, - buffer_info->length, - DMA_FROM_DEVICE); - } - - buffer_info->dma = 0; - if (buffer_info->page) { - put_page(buffer_info->page); - buffer_info->page = NULL; - } - if (buffer_info->skb) { - dev_kfree_skb(buffer_info->skb); - buffer_info->skb = NULL; - } - } - - /* there also may be some cached data from a chained receive */ - if (rx_ring->rx_skb_top) { - dev_kfree_skb(rx_ring->rx_skb_top); - rx_ring->rx_skb_top = NULL; - } - - size = sizeof(struct e1000_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); - - memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); - 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) { - e_err(probe, "memory allocation failed\n"); - 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); -} - -/* Need to wait a few seconds after link up to get diagnostic information from - * the phy */ - -static void e1000_update_phy_info(unsigned long data) -{ - struct e1000_adapter *adapter = (struct e1000_adapter *)data; - schedule_work(&adapter->phy_info_task); -} - -static void e1000_update_phy_info_task(struct work_struct *work) -{ - struct e1000_adapter *adapter = container_of(work, - struct e1000_adapter, - phy_info_task); - struct e1000_hw *hw = &adapter->hw; - - rtnl_lock(); - e1000_phy_get_info(hw, &adapter->phy_info); - rtnl_unlock(); -} - -/** - * e1000_82547_tx_fifo_stall - Timer Call-back - * @data: pointer to adapter cast into an unsigned long - **/ -static void e1000_82547_tx_fifo_stall(unsigned long data) -{ - struct e1000_adapter *adapter = (struct e1000_adapter *)data; - schedule_work(&adapter->fifo_stall_task); -} - -/** - * 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); - struct e1000_hw *hw = &adapter->hw; - struct net_device *netdev = adapter->netdev; - u32 tctl; - - rtnl_lock(); - 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)) { - mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1); - } - } - rtnl_unlock(); -} - -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 - Timer Call-back - * @data: pointer to adapter cast into an unsigned long - **/ -static void e1000_watchdog(unsigned long data) -{ - struct e1000_adapter *adapter = (struct e1000_adapter *)data; - 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; - bool txb2b = true; - /* 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: - txb2b = false; - adapter->tx_timeout_factor = 16; - break; - case SPEED_100: - txb2b = false; - /* 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)) - mod_timer(&adapter->phy_info_timer, - round_jiffies(jiffies + 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)) - mod_timer(&adapter->phy_info_timer, - round_jiffies(jiffies + 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); - /* return 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; - - /* Reset the timer */ - if (!test_bit(__E1000_DOWN, &adapter->flags)) - mod_timer(&adapter->watchdog_timer, - round_jiffies(jiffies + 2 * HZ)); -} - -enum latency_range { - lowest_latency = 0, - low_latency = 1, - bulk_latency = 2, - latency_invalid = 255 -}; - -/** - * 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)) { - current_itr = 0; - 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_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) -{ - struct e1000_context_desc *context_desc; - struct e1000_buffer *buffer_info; - unsigned int i; - u32 cmd_length = 0; - u16 ipcse = 0, tucse, mss; - u8 ipcss, ipcso, tucss, tucso, hdr_len; - int err; - - if (skb_is_gso(skb)) { - if (skb_header_cloned(skb)) { - err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); - if (err) - return err; - } - - hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); - mss = skb_shinfo(skb)->gso_size; - if (skb->protocol == htons(ETH_P_IP)) { - struct iphdr *iph = ip_hdr(skb); - iph->tot_len = 0; - iph->check = 0; - tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, - iph->daddr, 0, - IPPROTO_TCP, - 0); - cmd_length = E1000_TXD_CMD_IP; - ipcse = skb_transport_offset(skb) - 1; - } else if (skb->protocol == htons(ETH_P_IPV6)) { - ipv6_hdr(skb)->payload_len = 0; - tcp_hdr(skb)->check = - ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, - &ipv6_hdr(skb)->daddr, - 0, IPPROTO_TCP, 0); - 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) -{ - struct e1000_context_desc *context_desc; - struct e1000_buffer *buffer_info; - unsigned int i; - u8 css; - u32 cmd_len = E1000_TXD_CMD_DEXT; - - if (skb->ip_summed != CHECKSUM_PARTIAL) - return false; - - switch (skb->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_buffer *buffer_info; - unsigned int len = skb_headlen(skb); - unsigned int offset = 0, size, count = 0, i; - unsigned int f; - - 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 = 0; - 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++) { - struct skb_frag_struct *frag; - - frag = &skb_shinfo(skb)->frags[f]; - len = frag->size; - offset = frag->page_offset; - - while (len) { - 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. */ - if (unlikely(adapter->pcix_82544 && - !((unsigned long)(page_to_phys(frag->page) + offset - + size - 1) & 4) && - size > 4)) - size -= 4; - - buffer_info->length = size; - buffer_info->time_stamp = jiffies; - buffer_info->mapped_as_page = true; - buffer_info->dma = dma_map_page(&pdev->dev, frag->page, - 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++; - } - } - - tx_ring->buffer_info[i].skb = skb; - 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); - } - - return 0; -} - -static void e1000_tx_queue(struct e1000_adapter *adapter, - struct e1000_tx_ring *tx_ring, int tx_flags, - int count) -{ - struct e1000_hw *hw = &adapter->hw; - struct e1000_tx_desc *tx_desc = NULL; - struct e1000_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); - } - - 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); - - /* Force memory writes to complete before letting h/w - * know there are new descriptors to fetch. (Only - * applicable for weak-ordered memory model archs, - * such as IA-64). */ - wmb(); - - tx_ring->next_to_use = i; - writel(i, hw->hw_addr + tx_ring->tdt); - /* we need this if more than one processor can write to our tail - * at a time, it syncronizes IO on IA64/Altix systems */ - mmiowb(); -} - -/** - * 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) >> (X)) + 1 ) -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; - - /* 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; - - if (unlikely(skb->len <= 0)) { - dev_kfree_skb_any(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_transport_offset(skb) + tcp_hdrlen(skb); - if (skb->data_len && hdr_len == len) { - switch (hw->mac_type) { - unsigned int pull_size; - case e1000_82544: - /* 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; - /* fall through */ - 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_shinfo(skb)->frags[f].size, - 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)) { - if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) { - netif_stop_queue(netdev); - if (!test_bit(__E1000_DOWN, &adapter->flags)) - mod_timer(&adapter->tx_fifo_stall_timer, - jiffies + 1); - return NETDEV_TX_BUSY; - } - } - - if (vlan_tx_tag_present(skb)) { - tx_flags |= E1000_TX_FLAGS_VLAN; - tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT); - } - - first = tx_ring->next_to_use; - - tso = e1000_tso(adapter, tx_ring, skb); - 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 = 1; - tx_flags |= E1000_TX_FLAGS_TSO; - } else if (likely(e1000_tx_csum(adapter, tx_ring, skb))) - tx_flags |= E1000_TX_FLAGS_CSUM; - - if (likely(skb->protocol == htons(ETH_P_IP))) - tx_flags |= E1000_TX_FLAGS_IPV4; - - count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd, - nr_frags, mss); - - if (count) { - e1000_tx_queue(adapter, tx_ring, tx_flags, count); - /* Make sure there is space in the ring for the next send. */ - e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2); - - } else { - dev_kfree_skb_any(skb); - tx_ring->buffer_info[first].time_stamp = 0; - tx_ring->next_to_use = first; - } - - return NETDEV_TX_OK; -} - -/** - * e1000_tx_timeout - Respond to a Tx Hang - * @netdev: network interface device structure - **/ - -static void e1000_tx_timeout(struct net_device *netdev) -{ - 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); - - e1000_reinit_safe(adapter); -} - -/** - * e1000_get_stats - Get System Network Statistics - * @netdev: network interface device structure - * - * Returns the address of the device statistics structure. - * The statistics are actually updated from the timer callback. - **/ - -static struct net_device_stats *e1000_get_stats(struct net_device *netdev) -{ - /* only return the current stats */ - return &netdev->stats; -} - -/** - * 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 + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; - - if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) || - (max_frame > MAX_JUMBO_FRAME_SIZE)) { - e_err(probe, "Invalid MTU setting\n"); - return -EINVAL; - } - - /* 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)) - 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; - - pr_info("%s changing MTU from %d to %d\n", - netdev->name, 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)) - mod_timer(&adapter->watchdog_timer, jiffies + 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 - * @adapter: board private structure - **/ -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; - - /* If budget not fully consumed, exit the polling mode */ - if (work_done < budget) { - if (likely(adapter->itr_setting & 3)) - e1000_set_itr(adapter); - napi_complete(napi); - 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 - **/ -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_buffer *buffer_info; - unsigned int i, eop; - unsigned int count = 0; - unsigned int total_tx_bytes=0, total_tx_packets=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; - 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) { - struct sk_buff *skb = buffer_info->skb; - unsigned int segs, bytecount; - segs = skb_shinfo(skb)->gso_segs ?: 1; - /* multiply data chunks by size of headers */ - bytecount = ((segs - 1) * skb_headlen(skb)) + - skb->len; - total_tx_packets += segs; - total_tx_bytes += bytecount; - } - e1000_unmap_and_free_tx_resource(adapter, buffer_info); - 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); - } - - tx_ring->next_to_clean = i; - -#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) / - sizeof(struct e1000_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); - 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 - * @sk_buff: 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 - **/ -static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb, - u16 length) -{ - bi->page = NULL; - skb->len += length; - skb->data_len += length; - skb->truesize += length; -} - -/** - * 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, vid); - } - napi_gro_receive(&adapter->napi, 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 e1000_hw *hw = &adapter->hw; - struct net_device *netdev = adapter->netdev; - struct pci_dev *pdev = adapter->pdev; - struct e1000_rx_desc *rx_desc, *next_rxd; - struct e1000_buffer *buffer_info, *next_buffer; - unsigned long irq_flags; - 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)++; - rmb(); /* read descriptor and rx_buffer_info after status DD */ - - status = rx_desc->status; - skb = buffer_info->skb; - buffer_info->skb = 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++; - dma_unmap_page(&pdev->dev, buffer_info->dma, - buffer_info->length, 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 last_byte = *(skb->data + length - 1); - if (TBI_ACCEPT(hw, status, rx_desc->errors, length, - last_byte)) { - spin_lock_irqsave(&adapter->stats_lock, - irq_flags); - e1000_tbi_adjust_stats(hw, &adapter->stats, - length, skb->data); - spin_unlock_irqrestore(&adapter->stats_lock, - irq_flags); - length--; - } else { - /* recycle both page and skb */ - buffer_info->skb = skb; - /* an error means any chain goes out the window - * too */ - if (rx_ring->rx_skb_top) - dev_kfree_skb(rx_ring->rx_skb_top); - rx_ring->rx_skb_top = NULL; - goto next_desc; - } - } - -#define rxtop rx_ring->rx_skb_top - if (!(status & E1000_RXD_STAT_EOP)) { - /* this descriptor is only the beginning (or middle) */ - if (!rxtop) { - /* this is the beginning of a chain */ - rxtop = skb; - skb_fill_page_desc(rxtop, 0, buffer_info->page, - 0, length); - } else { - /* this is the middle of a chain */ - skb_fill_page_desc(rxtop, - skb_shinfo(rxtop)->nr_frags, - buffer_info->page, 0, length); - /* re-use the skb, only consumed the page */ - buffer_info->skb = skb; - } - 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->page, 0, length); - /* re-use the current skb, we only consumed the - * page */ - buffer_info->skb = skb; - skb = rxtop; - rxtop = NULL; - e1000_consume_page(buffer_info, skb, length); - } else { - /* no chain, got EOP, this buf is the packet - * copybreak to save the put_page/alloc_page */ - if (length <= copybreak && - skb_tailroom(skb) >= length) { - u8 *vaddr; - vaddr = kmap_atomic(buffer_info->page, - KM_SKB_DATA_SOFTIRQ); - memcpy(skb_tail_pointer(skb), vaddr, length); - kunmap_atomic(vaddr, - KM_SKB_DATA_SOFTIRQ); - /* re-use the page, so don't erase - * buffer_info->page */ - skb_put(skb, length); - } else { - skb_fill_page_desc(skb, 0, - buffer_info->page, 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); - - pskb_trim(skb, skb->len - 4); - - /* probably a little skewed due to removing CRC */ - total_rx_bytes += skb->len; - total_rx_packets++; - - /* eth type trans needs skb->data to point to something */ - if (!pskb_may_pull(skb, ETH_HLEN)) { - e_err(drv, "pskb_may_pull failed.\n"); - dev_kfree_skb(skb); - goto next_desc; - } - - 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; -} - -/* - * this should improve performance for small packets with large amounts - * of reassembly being done in the stack - */ -static void e1000_check_copybreak(struct net_device *netdev, - struct e1000_buffer *buffer_info, - u32 length, struct sk_buff **skb) -{ - struct sk_buff *new_skb; - - if (length > copybreak) - return; - - new_skb = netdev_alloc_skb_ip_align(netdev, length); - if (!new_skb) - return; - - skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN, - (*skb)->data - NET_IP_ALIGN, - length + NET_IP_ALIGN); - /* save the skb in buffer_info as good */ - buffer_info->skb = *skb; - *skb = new_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 e1000_hw *hw = &adapter->hw; - struct net_device *netdev = adapter->netdev; - struct pci_dev *pdev = adapter->pdev; - struct e1000_rx_desc *rx_desc, *next_rxd; - struct e1000_buffer *buffer_info, *next_buffer; - unsigned long flags; - 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)++; - rmb(); /* read descriptor and rx_buffer_info after status DD */ - - status = rx_desc->status; - skb = buffer_info->skb; - buffer_info->skb = NULL; - - prefetch(skb->data - NET_IP_ALIGN); - - 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_single(&pdev->dev, buffer_info->dma, - buffer_info->length, DMA_FROM_DEVICE); - buffer_info->dma = 0; - - length = le16_to_cpu(rx_desc->length); - /* !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 */ - e_dbg("Receive packet consumed multiple buffers\n"); - /* recycle */ - buffer_info->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)) { - u8 last_byte = *(skb->data + length - 1); - if (TBI_ACCEPT(hw, status, rx_desc->errors, length, - last_byte)) { - spin_lock_irqsave(&adapter->stats_lock, flags); - e1000_tbi_adjust_stats(hw, &adapter->stats, - length, skb->data); - spin_unlock_irqrestore(&adapter->stats_lock, - flags); - length--; - } else { - /* recycle */ - buffer_info->skb = skb; - goto next_desc; - } - } - - /* adjust length to remove Ethernet CRC, this must be - * done after the TBI_ACCEPT workaround above */ - length -= 4; - - /* probably a little skewed due to removing CRC */ - total_rx_bytes += length; - total_rx_packets++; - - e1000_check_copybreak(netdev, buffer_info, length, &skb); - - skb_put(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 net_device *netdev = adapter->netdev; - struct pci_dev *pdev = adapter->pdev; - struct e1000_rx_desc *rx_desc; - struct e1000_buffer *buffer_info; - struct sk_buff *skb; - unsigned int i; - unsigned int bufsz = 256 - 16 /*for skb_reserve */ ; - - i = rx_ring->next_to_use; - buffer_info = &rx_ring->buffer_info[i]; - - while (cleaned_count--) { - skb = buffer_info->skb; - if (skb) { - skb_trim(skb, 0); - goto check_page; - } - - skb = netdev_alloc_skb_ip_align(netdev, bufsz); - if (unlikely(!skb)) { - /* 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, skb->data, bufsz)) { - struct sk_buff *oldskb = skb; - e_err(rx_err, "skb align check failed: %u bytes at " - "%p\n", bufsz, skb->data); - /* Try again, without freeing the previous */ - skb = netdev_alloc_skb_ip_align(netdev, bufsz); - /* Failed allocation, critical failure */ - if (!skb) { - dev_kfree_skb(oldskb); - adapter->alloc_rx_buff_failed++; - break; - } - - if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { - /* give up */ - dev_kfree_skb(skb); - dev_kfree_skb(oldskb); - break; /* while (cleaned_count--) */ - } - - /* Use new allocation */ - dev_kfree_skb(oldskb); - } - buffer_info->skb = skb; - buffer_info->length = adapter->rx_buffer_len; -check_page: - /* allocate a new page if necessary */ - if (!buffer_info->page) { - buffer_info->page = alloc_page(GFP_ATOMIC); - if (unlikely(!buffer_info->page)) { - adapter->alloc_rx_buff_failed++; - break; - } - } - - if (!buffer_info->dma) { - buffer_info->dma = dma_map_page(&pdev->dev, - buffer_info->page, 0, - buffer_info->length, - DMA_FROM_DEVICE); - if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { - put_page(buffer_info->page); - dev_kfree_skb(skb); - buffer_info->page = NULL; - buffer_info->skb = NULL; - buffer_info->dma = 0; - adapter->alloc_rx_buff_failed++; - break; /* while !buffer_info->skb */ - } - } - - 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). */ - 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 - **/ - -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 net_device *netdev = adapter->netdev; - struct pci_dev *pdev = adapter->pdev; - struct e1000_rx_desc *rx_desc; - struct e1000_buffer *buffer_info; - struct sk_buff *skb; - 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--) { - skb = buffer_info->skb; - if (skb) { - skb_trim(skb, 0); - goto map_skb; - } - - skb = netdev_alloc_skb_ip_align(netdev, bufsz); - if (unlikely(!skb)) { - /* 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, skb->data, bufsz)) { - struct sk_buff *oldskb = skb; - e_err(rx_err, "skb align check failed: %u bytes at " - "%p\n", bufsz, skb->data); - /* Try again, without freeing the previous */ - skb = netdev_alloc_skb_ip_align(netdev, bufsz); - /* Failed allocation, critical failure */ - if (!skb) { - dev_kfree_skb(oldskb); - adapter->alloc_rx_buff_failed++; - break; - } - - if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { - /* give up */ - dev_kfree_skb(skb); - dev_kfree_skb(oldskb); - adapter->alloc_rx_buff_failed++; - break; /* while !buffer_info->skb */ - } - - /* Use new allocation */ - dev_kfree_skb(oldskb); - } - buffer_info->skb = skb; - buffer_info->length = adapter->rx_buffer_len; -map_skb: - buffer_info->dma = dma_map_single(&pdev->dev, - skb->data, - buffer_info->length, - DMA_FROM_DEVICE); - if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { - dev_kfree_skb(skb); - buffer_info->skb = NULL; - buffer_info->dma = 0; - adapter->alloc_rx_buff_failed++; - break; /* while !buffer_info->skb */ - } - - /* - * 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); - dev_kfree_skb(skb); - buffer_info->skb = NULL; - - dma_unmap_single(&pdev->dev, buffer_info->dma, - adapter->rx_buffer_len, - DMA_FROM_DEVICE); - buffer_info->dma = 0; - - adapter->alloc_rx_buff_failed++; - break; /* while !buffer_info->skb */ - } - 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). */ - wmb(); - writel(i, hw->hw_addr + rx_ring->rdt); - } -} - -/** - * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers. - * @adapter: - **/ - -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 - - * @netdev: - * @ifreq: - * @cmd: - **/ - -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: - * @ifreq: - * @cmd: - **/ - -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_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); - - 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, u32 features) -{ - struct e1000_adapter *adapter = netdev_priv(netdev); - struct e1000_hw *hw = &adapter->hw; - u32 ctrl; - - if (!test_bit(__E1000_DOWN, &adapter->flags)) - e1000_irq_disable(adapter); - - ctrl = er32(CTRL); - if (features & NETIF_F_HW_VLAN_RX) { - /* enable VLAN tag insert/strip */ - ctrl |= E1000_CTRL_VME; - } else { - /* disable VLAN tag insert/strip */ - ctrl &= ~E1000_CTRL_VME; - } - ew32(CTRL, ctrl); - - if (!test_bit(__E1000_DOWN, &adapter->flags)) - e1000_irq_enable(adapter); -} - -static void e1000_vlan_rx_add_vid(struct net_device *netdev, 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; - - 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); -} - -static void e1000_vlan_rx_kill_vid(struct net_device *netdev, 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); -} - -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, 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; - } - 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; -#ifdef CONFIG_PM - int retval = 0; -#endif - - netif_device_detach(netdev); - - if (netif_running(netdev)) { - WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags)); - e1000_down(adapter); - } - -#ifdef CONFIG_PM - retval = pci_save_state(pdev); - if (retval) - return retval; -#endif - - status = er32(STATUS); - if (status & E1000_STATUS_LU) - wufc &= ~E1000_WUFC_LNKC; - - if (wufc) { - e1000_setup_rctl(adapter); - e1000_set_rx_mode(netdev); - - /* turn on all-multi mode if wake on multicast is enabled */ - if (wufc & E1000_WUFC_MC) { - rctl = er32(RCTL); - rctl |= E1000_RCTL_MPE; - ew32(RCTL, rctl); - } - - 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); - - pci_disable_device(pdev); - - return 0; -} - -#ifdef CONFIG_PM -static int e1000_suspend(struct pci_dev *pdev, pm_message_t state) -{ - int retval; - bool wake; - - retval = __e1000_shutdown(pdev, &wake); - if (retval) - return retval; - - if (wake) { - pci_prepare_to_sleep(pdev); - } else { - pci_wake_from_d3(pdev, false); - pci_set_power_state(pdev, PCI_D3hot); - } - - return 0; -} - -static int e1000_resume(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; - u32 err; - - pci_set_power_state(pdev, PCI_D0); - pci_restore_state(pdev); - pci_save_state(pdev); - - 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; - } - 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; -} -#endif - -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); - - disable_irq(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); - pci_disable_device(pdev); - - /* Request a slot 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; - } - 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 */ |