![Joe Perches](/assets/img/avatar_default.png)
There appears to be an off-by-1 defect in the maximum packet size copied when copybreak is speified in these modules. The copybreak module params are specified as: "Maximum size of packet that is copied to a new buffer on receive" The tests are changed from "< copybreak" to "<= copybreak" and moved into new static functions for readability. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2350 lines
62 KiB
C
2350 lines
62 KiB
C
/*******************************************************************************
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Intel PRO/10GbE Linux driver
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Copyright(c) 1999 - 2008 Intel Corporation.
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This program is free software; you can redistribute it and/or modify it
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under the terms and conditions of the GNU General Public License,
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version 2, as published by the Free Software Foundation.
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This program is distributed in the hope it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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The full GNU General Public License is included in this distribution in
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the file called "COPYING".
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Contact Information:
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Linux NICS <linux.nics@intel.com>
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e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
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Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*******************************************************************************/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include "ixgb.h"
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char ixgb_driver_name[] = "ixgb";
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static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
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#define DRIVERNAPI "-NAPI"
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#define DRV_VERSION "1.0.135-k2" DRIVERNAPI
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const char ixgb_driver_version[] = DRV_VERSION;
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static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation.";
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#define IXGB_CB_LENGTH 256
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static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH;
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module_param(copybreak, uint, 0644);
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MODULE_PARM_DESC(copybreak,
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"Maximum size of packet that is copied to a new buffer on receive");
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/* ixgb_pci_tbl - PCI Device ID Table
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*
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* Wildcard entries (PCI_ANY_ID) should come last
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* Last entry must be all 0s
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*
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* { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
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* Class, Class Mask, private data (not used) }
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*/
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static DEFINE_PCI_DEVICE_TABLE(ixgb_pci_tbl) = {
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{INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
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PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
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{INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4,
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PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
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{INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
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PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
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{INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR,
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PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
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/* required last entry */
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{0,}
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};
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MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
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/* Local Function Prototypes */
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static int ixgb_init_module(void);
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static void ixgb_exit_module(void);
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static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
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static void __devexit ixgb_remove(struct pci_dev *pdev);
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static int ixgb_sw_init(struct ixgb_adapter *adapter);
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static int ixgb_open(struct net_device *netdev);
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static int ixgb_close(struct net_device *netdev);
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static void ixgb_configure_tx(struct ixgb_adapter *adapter);
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static void ixgb_configure_rx(struct ixgb_adapter *adapter);
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static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
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static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
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static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
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static void ixgb_set_multi(struct net_device *netdev);
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static void ixgb_watchdog(unsigned long data);
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static netdev_tx_t ixgb_xmit_frame(struct sk_buff *skb,
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struct net_device *netdev);
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static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
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static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
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static int ixgb_set_mac(struct net_device *netdev, void *p);
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static irqreturn_t ixgb_intr(int irq, void *data);
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static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
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static int ixgb_clean(struct napi_struct *, int);
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static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int);
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static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int);
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static void ixgb_tx_timeout(struct net_device *dev);
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static void ixgb_tx_timeout_task(struct work_struct *work);
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static void ixgb_vlan_rx_register(struct net_device *netdev,
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struct vlan_group *grp);
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static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
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static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
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static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
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#ifdef CONFIG_NET_POLL_CONTROLLER
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/* for netdump / net console */
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static void ixgb_netpoll(struct net_device *dev);
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#endif
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static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
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enum pci_channel_state state);
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static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
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static void ixgb_io_resume (struct pci_dev *pdev);
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static struct pci_error_handlers ixgb_err_handler = {
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.error_detected = ixgb_io_error_detected,
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.slot_reset = ixgb_io_slot_reset,
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.resume = ixgb_io_resume,
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};
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static struct pci_driver ixgb_driver = {
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.name = ixgb_driver_name,
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.id_table = ixgb_pci_tbl,
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.probe = ixgb_probe,
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.remove = __devexit_p(ixgb_remove),
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.err_handler = &ixgb_err_handler
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};
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MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
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MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_VERSION);
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#define DEFAULT_DEBUG_LEVEL_SHIFT 3
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static int debug = DEFAULT_DEBUG_LEVEL_SHIFT;
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module_param(debug, int, 0);
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MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
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/**
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* ixgb_init_module - Driver Registration Routine
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*
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* ixgb_init_module is the first routine called when the driver is
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* loaded. All it does is register with the PCI subsystem.
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**/
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static int __init
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ixgb_init_module(void)
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{
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pr_info("%s - version %s\n", ixgb_driver_string, ixgb_driver_version);
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pr_info("%s\n", ixgb_copyright);
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return pci_register_driver(&ixgb_driver);
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}
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module_init(ixgb_init_module);
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/**
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* ixgb_exit_module - Driver Exit Cleanup Routine
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*
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* ixgb_exit_module is called just before the driver is removed
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* from memory.
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**/
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static void __exit
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ixgb_exit_module(void)
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{
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pci_unregister_driver(&ixgb_driver);
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}
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module_exit(ixgb_exit_module);
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/**
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* ixgb_irq_disable - Mask off interrupt generation on the NIC
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* @adapter: board private structure
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**/
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static void
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ixgb_irq_disable(struct ixgb_adapter *adapter)
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{
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IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
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IXGB_WRITE_FLUSH(&adapter->hw);
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synchronize_irq(adapter->pdev->irq);
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}
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/**
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* ixgb_irq_enable - Enable default interrupt generation settings
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* @adapter: board private structure
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**/
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static void
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ixgb_irq_enable(struct ixgb_adapter *adapter)
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{
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u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
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IXGB_INT_TXDW | IXGB_INT_LSC;
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if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID)
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val |= IXGB_INT_GPI0;
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IXGB_WRITE_REG(&adapter->hw, IMS, val);
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IXGB_WRITE_FLUSH(&adapter->hw);
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}
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int
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ixgb_up(struct ixgb_adapter *adapter)
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{
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struct net_device *netdev = adapter->netdev;
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int err, irq_flags = IRQF_SHARED;
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int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
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struct ixgb_hw *hw = &adapter->hw;
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/* hardware has been reset, we need to reload some things */
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ixgb_rar_set(hw, netdev->dev_addr, 0);
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ixgb_set_multi(netdev);
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ixgb_restore_vlan(adapter);
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ixgb_configure_tx(adapter);
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ixgb_setup_rctl(adapter);
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ixgb_configure_rx(adapter);
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ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring));
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/* disable interrupts and get the hardware into a known state */
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IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
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/* only enable MSI if bus is in PCI-X mode */
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if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
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err = pci_enable_msi(adapter->pdev);
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if (!err) {
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adapter->have_msi = 1;
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irq_flags = 0;
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}
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/* proceed to try to request regular interrupt */
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}
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err = request_irq(adapter->pdev->irq, ixgb_intr, irq_flags,
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netdev->name, netdev);
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if (err) {
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if (adapter->have_msi)
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pci_disable_msi(adapter->pdev);
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netif_err(adapter, probe, adapter->netdev,
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"Unable to allocate interrupt Error: %d\n", err);
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return err;
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}
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if ((hw->max_frame_size != max_frame) ||
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(hw->max_frame_size !=
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(IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
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hw->max_frame_size = max_frame;
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IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
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if (hw->max_frame_size >
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IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
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u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
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if (!(ctrl0 & IXGB_CTRL0_JFE)) {
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ctrl0 |= IXGB_CTRL0_JFE;
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IXGB_WRITE_REG(hw, CTRL0, ctrl0);
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}
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}
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}
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clear_bit(__IXGB_DOWN, &adapter->flags);
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napi_enable(&adapter->napi);
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ixgb_irq_enable(adapter);
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netif_wake_queue(netdev);
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mod_timer(&adapter->watchdog_timer, jiffies);
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return 0;
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}
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void
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ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog)
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{
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struct net_device *netdev = adapter->netdev;
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/* prevent the interrupt handler from restarting watchdog */
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set_bit(__IXGB_DOWN, &adapter->flags);
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napi_disable(&adapter->napi);
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/* waiting for NAPI to complete can re-enable interrupts */
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ixgb_irq_disable(adapter);
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free_irq(adapter->pdev->irq, netdev);
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if (adapter->have_msi)
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pci_disable_msi(adapter->pdev);
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if (kill_watchdog)
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del_timer_sync(&adapter->watchdog_timer);
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adapter->link_speed = 0;
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adapter->link_duplex = 0;
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netif_carrier_off(netdev);
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netif_stop_queue(netdev);
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ixgb_reset(adapter);
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ixgb_clean_tx_ring(adapter);
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ixgb_clean_rx_ring(adapter);
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}
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void
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ixgb_reset(struct ixgb_adapter *adapter)
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{
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struct ixgb_hw *hw = &adapter->hw;
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ixgb_adapter_stop(hw);
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if (!ixgb_init_hw(hw))
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netif_err(adapter, probe, adapter->netdev, "ixgb_init_hw failed\n");
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/* restore frame size information */
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IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
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if (hw->max_frame_size >
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IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
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u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
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if (!(ctrl0 & IXGB_CTRL0_JFE)) {
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ctrl0 |= IXGB_CTRL0_JFE;
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IXGB_WRITE_REG(hw, CTRL0, ctrl0);
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}
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}
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}
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static const struct net_device_ops ixgb_netdev_ops = {
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.ndo_open = ixgb_open,
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.ndo_stop = ixgb_close,
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.ndo_start_xmit = ixgb_xmit_frame,
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.ndo_get_stats = ixgb_get_stats,
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.ndo_set_multicast_list = ixgb_set_multi,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_set_mac_address = ixgb_set_mac,
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.ndo_change_mtu = ixgb_change_mtu,
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.ndo_tx_timeout = ixgb_tx_timeout,
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.ndo_vlan_rx_register = ixgb_vlan_rx_register,
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.ndo_vlan_rx_add_vid = ixgb_vlan_rx_add_vid,
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.ndo_vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid,
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#ifdef CONFIG_NET_POLL_CONTROLLER
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.ndo_poll_controller = ixgb_netpoll,
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#endif
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};
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/**
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* ixgb_probe - Device Initialization Routine
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* @pdev: PCI device information struct
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* @ent: entry in ixgb_pci_tbl
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*
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* Returns 0 on success, negative on failure
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*
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* ixgb_probe initializes an adapter identified by a pci_dev structure.
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* The OS initialization, configuring of the adapter private structure,
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* and a hardware reset occur.
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**/
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static int __devinit
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ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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{
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struct net_device *netdev = NULL;
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struct ixgb_adapter *adapter;
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static int cards_found = 0;
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int pci_using_dac;
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int i;
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int err;
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err = pci_enable_device(pdev);
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if (err)
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return err;
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pci_using_dac = 0;
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err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
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if (!err) {
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err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
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if (!err)
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pci_using_dac = 1;
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} else {
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err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
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if (err) {
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err = dma_set_coherent_mask(&pdev->dev,
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DMA_BIT_MASK(32));
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if (err) {
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pr_err("No usable DMA configuration, aborting\n");
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goto err_dma_mask;
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}
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}
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}
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err = pci_request_regions(pdev, ixgb_driver_name);
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if (err)
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goto err_request_regions;
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pci_set_master(pdev);
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netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
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if (!netdev) {
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err = -ENOMEM;
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goto err_alloc_etherdev;
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}
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SET_NETDEV_DEV(netdev, &pdev->dev);
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pci_set_drvdata(pdev, netdev);
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adapter = netdev_priv(netdev);
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adapter->netdev = netdev;
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adapter->pdev = pdev;
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adapter->hw.back = adapter;
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adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
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adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0);
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if (!adapter->hw.hw_addr) {
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err = -EIO;
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goto err_ioremap;
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}
|
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for (i = BAR_1; i <= BAR_5; i++) {
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if (pci_resource_len(pdev, i) == 0)
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continue;
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if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
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adapter->hw.io_base = pci_resource_start(pdev, i);
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break;
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}
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}
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netdev->netdev_ops = &ixgb_netdev_ops;
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ixgb_set_ethtool_ops(netdev);
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netdev->watchdog_timeo = 5 * HZ;
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netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
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strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
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adapter->bd_number = cards_found;
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adapter->link_speed = 0;
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adapter->link_duplex = 0;
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/* setup the private structure */
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err = ixgb_sw_init(adapter);
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if (err)
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goto err_sw_init;
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netdev->features = NETIF_F_SG |
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NETIF_F_HW_CSUM |
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NETIF_F_HW_VLAN_TX |
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NETIF_F_HW_VLAN_RX |
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NETIF_F_HW_VLAN_FILTER;
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netdev->features |= NETIF_F_TSO;
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if (pci_using_dac)
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netdev->features |= NETIF_F_HIGHDMA;
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/* make sure the EEPROM is good */
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if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
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netif_err(adapter, probe, adapter->netdev,
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"The EEPROM Checksum Is Not Valid\n");
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err = -EIO;
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goto err_eeprom;
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}
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ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
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memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
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if (!is_valid_ether_addr(netdev->perm_addr)) {
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netif_err(adapter, probe, adapter->netdev, "Invalid MAC Address\n");
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err = -EIO;
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goto err_eeprom;
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}
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adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
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|
|
init_timer(&adapter->watchdog_timer);
|
|
adapter->watchdog_timer.function = &ixgb_watchdog;
|
|
adapter->watchdog_timer.data = (unsigned long)adapter;
|
|
|
|
INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
|
|
|
|
strcpy(netdev->name, "eth%d");
|
|
err = register_netdev(netdev);
|
|
if (err)
|
|
goto err_register;
|
|
|
|
/* carrier off reporting is important to ethtool even BEFORE open */
|
|
netif_carrier_off(netdev);
|
|
|
|
netif_info(adapter, probe, adapter->netdev,
|
|
"Intel(R) PRO/10GbE Network Connection\n");
|
|
ixgb_check_options(adapter);
|
|
/* reset the hardware with the new settings */
|
|
|
|
ixgb_reset(adapter);
|
|
|
|
cards_found++;
|
|
return 0;
|
|
|
|
err_register:
|
|
err_sw_init:
|
|
err_eeprom:
|
|
iounmap(adapter->hw.hw_addr);
|
|
err_ioremap:
|
|
free_netdev(netdev);
|
|
err_alloc_etherdev:
|
|
pci_release_regions(pdev);
|
|
err_request_regions:
|
|
err_dma_mask:
|
|
pci_disable_device(pdev);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ixgb_remove - Device Removal Routine
|
|
* @pdev: PCI device information struct
|
|
*
|
|
* ixgb_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
|
|
ixgb_remove(struct pci_dev *pdev)
|
|
{
|
|
struct net_device *netdev = pci_get_drvdata(pdev);
|
|
struct ixgb_adapter *adapter = netdev_priv(netdev);
|
|
|
|
flush_scheduled_work();
|
|
|
|
unregister_netdev(netdev);
|
|
|
|
iounmap(adapter->hw.hw_addr);
|
|
pci_release_regions(pdev);
|
|
|
|
free_netdev(netdev);
|
|
}
|
|
|
|
/**
|
|
* ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
|
|
* @adapter: board private structure to initialize
|
|
*
|
|
* ixgb_sw_init initializes the Adapter private data structure.
|
|
* Fields are initialized based on PCI device information and
|
|
* OS network device settings (MTU size).
|
|
**/
|
|
|
|
static int __devinit
|
|
ixgb_sw_init(struct ixgb_adapter *adapter)
|
|
{
|
|
struct ixgb_hw *hw = &adapter->hw;
|
|
struct net_device *netdev = adapter->netdev;
|
|
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->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
|
|
adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */
|
|
|
|
if ((hw->device_id == IXGB_DEVICE_ID_82597EX) ||
|
|
(hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) ||
|
|
(hw->device_id == IXGB_DEVICE_ID_82597EX_LR) ||
|
|
(hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
|
|
hw->mac_type = ixgb_82597;
|
|
else {
|
|
/* should never have loaded on this device */
|
|
netif_err(adapter, probe, adapter->netdev, "unsupported device id\n");
|
|
}
|
|
|
|
/* enable flow control to be programmed */
|
|
hw->fc.send_xon = 1;
|
|
|
|
set_bit(__IXGB_DOWN, &adapter->flags);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ixgb_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
|
|
ixgb_open(struct net_device *netdev)
|
|
{
|
|
struct ixgb_adapter *adapter = netdev_priv(netdev);
|
|
int err;
|
|
|
|
/* allocate transmit descriptors */
|
|
err = ixgb_setup_tx_resources(adapter);
|
|
if (err)
|
|
goto err_setup_tx;
|
|
|
|
netif_carrier_off(netdev);
|
|
|
|
/* allocate receive descriptors */
|
|
|
|
err = ixgb_setup_rx_resources(adapter);
|
|
if (err)
|
|
goto err_setup_rx;
|
|
|
|
err = ixgb_up(adapter);
|
|
if (err)
|
|
goto err_up;
|
|
|
|
netif_start_queue(netdev);
|
|
|
|
return 0;
|
|
|
|
err_up:
|
|
ixgb_free_rx_resources(adapter);
|
|
err_setup_rx:
|
|
ixgb_free_tx_resources(adapter);
|
|
err_setup_tx:
|
|
ixgb_reset(adapter);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ixgb_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
|
|
ixgb_close(struct net_device *netdev)
|
|
{
|
|
struct ixgb_adapter *adapter = netdev_priv(netdev);
|
|
|
|
ixgb_down(adapter, true);
|
|
|
|
ixgb_free_tx_resources(adapter);
|
|
ixgb_free_rx_resources(adapter);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
|
|
* @adapter: board private structure
|
|
*
|
|
* Return 0 on success, negative on failure
|
|
**/
|
|
|
|
int
|
|
ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
|
|
{
|
|
struct ixgb_desc_ring *txdr = &adapter->tx_ring;
|
|
struct pci_dev *pdev = adapter->pdev;
|
|
int size;
|
|
|
|
size = sizeof(struct ixgb_buffer) * txdr->count;
|
|
txdr->buffer_info = vmalloc(size);
|
|
if (!txdr->buffer_info) {
|
|
netif_err(adapter, probe, adapter->netdev,
|
|
"Unable to allocate transmit descriptor ring memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
memset(txdr->buffer_info, 0, size);
|
|
|
|
/* round up to nearest 4K */
|
|
|
|
txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
|
|
txdr->size = ALIGN(txdr->size, 4096);
|
|
|
|
txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
|
|
GFP_KERNEL);
|
|
if (!txdr->desc) {
|
|
vfree(txdr->buffer_info);
|
|
netif_err(adapter, probe, adapter->netdev,
|
|
"Unable to allocate transmit descriptor memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
memset(txdr->desc, 0, txdr->size);
|
|
|
|
txdr->next_to_use = 0;
|
|
txdr->next_to_clean = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
|
|
* @adapter: board private structure
|
|
*
|
|
* Configure the Tx unit of the MAC after a reset.
|
|
**/
|
|
|
|
static void
|
|
ixgb_configure_tx(struct ixgb_adapter *adapter)
|
|
{
|
|
u64 tdba = adapter->tx_ring.dma;
|
|
u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
|
|
u32 tctl;
|
|
struct ixgb_hw *hw = &adapter->hw;
|
|
|
|
/* Setup the Base and Length of the Tx Descriptor Ring
|
|
* tx_ring.dma can be either a 32 or 64 bit value
|
|
*/
|
|
|
|
IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
|
|
IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
|
|
|
|
IXGB_WRITE_REG(hw, TDLEN, tdlen);
|
|
|
|
/* Setup the HW Tx Head and Tail descriptor pointers */
|
|
|
|
IXGB_WRITE_REG(hw, TDH, 0);
|
|
IXGB_WRITE_REG(hw, TDT, 0);
|
|
|
|
/* don't set up txdctl, it induces performance problems if configured
|
|
* incorrectly */
|
|
/* Set the Tx Interrupt Delay register */
|
|
|
|
IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
|
|
|
|
/* Program the Transmit Control Register */
|
|
|
|
tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
|
|
IXGB_WRITE_REG(hw, TCTL, tctl);
|
|
|
|
/* Setup Transmit Descriptor Settings for this adapter */
|
|
adapter->tx_cmd_type =
|
|
IXGB_TX_DESC_TYPE |
|
|
(adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
|
|
}
|
|
|
|
/**
|
|
* ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
|
|
* @adapter: board private structure
|
|
*
|
|
* Returns 0 on success, negative on failure
|
|
**/
|
|
|
|
int
|
|
ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
|
|
{
|
|
struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
|
|
struct pci_dev *pdev = adapter->pdev;
|
|
int size;
|
|
|
|
size = sizeof(struct ixgb_buffer) * rxdr->count;
|
|
rxdr->buffer_info = vmalloc(size);
|
|
if (!rxdr->buffer_info) {
|
|
netif_err(adapter, probe, adapter->netdev,
|
|
"Unable to allocate receive descriptor ring\n");
|
|
return -ENOMEM;
|
|
}
|
|
memset(rxdr->buffer_info, 0, size);
|
|
|
|
/* Round up to nearest 4K */
|
|
|
|
rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
|
|
rxdr->size = ALIGN(rxdr->size, 4096);
|
|
|
|
rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
|
|
GFP_KERNEL);
|
|
|
|
if (!rxdr->desc) {
|
|
vfree(rxdr->buffer_info);
|
|
netif_err(adapter, probe, adapter->netdev,
|
|
"Unable to allocate receive descriptors\n");
|
|
return -ENOMEM;
|
|
}
|
|
memset(rxdr->desc, 0, rxdr->size);
|
|
|
|
rxdr->next_to_clean = 0;
|
|
rxdr->next_to_use = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ixgb_setup_rctl - configure the receive control register
|
|
* @adapter: Board private structure
|
|
**/
|
|
|
|
static void
|
|
ixgb_setup_rctl(struct ixgb_adapter *adapter)
|
|
{
|
|
u32 rctl;
|
|
|
|
rctl = IXGB_READ_REG(&adapter->hw, RCTL);
|
|
|
|
rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
|
|
|
|
rctl |=
|
|
IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
|
|
IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
|
|
(adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
|
|
|
|
rctl |= IXGB_RCTL_SECRC;
|
|
|
|
if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
|
|
rctl |= IXGB_RCTL_BSIZE_2048;
|
|
else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
|
|
rctl |= IXGB_RCTL_BSIZE_4096;
|
|
else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
|
|
rctl |= IXGB_RCTL_BSIZE_8192;
|
|
else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
|
|
rctl |= IXGB_RCTL_BSIZE_16384;
|
|
|
|
IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
|
|
}
|
|
|
|
/**
|
|
* ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
|
|
* @adapter: board private structure
|
|
*
|
|
* Configure the Rx unit of the MAC after a reset.
|
|
**/
|
|
|
|
static void
|
|
ixgb_configure_rx(struct ixgb_adapter *adapter)
|
|
{
|
|
u64 rdba = adapter->rx_ring.dma;
|
|
u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
|
|
struct ixgb_hw *hw = &adapter->hw;
|
|
u32 rctl;
|
|
u32 rxcsum;
|
|
|
|
/* make sure receives are disabled while setting up the descriptors */
|
|
|
|
rctl = IXGB_READ_REG(hw, RCTL);
|
|
IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
|
|
|
|
/* set the Receive Delay Timer Register */
|
|
|
|
IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
|
|
|
|
/* Setup the Base and Length of the Rx Descriptor Ring */
|
|
|
|
IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
|
|
IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
|
|
|
|
IXGB_WRITE_REG(hw, RDLEN, rdlen);
|
|
|
|
/* Setup the HW Rx Head and Tail Descriptor Pointers */
|
|
IXGB_WRITE_REG(hw, RDH, 0);
|
|
IXGB_WRITE_REG(hw, RDT, 0);
|
|
|
|
/* due to the hardware errata with RXDCTL, we are unable to use any of
|
|
* the performance enhancing features of it without causing other
|
|
* subtle bugs, some of the bugs could include receive length
|
|
* corruption at high data rates (WTHRESH > 0) and/or receive
|
|
* descriptor ring irregularites (particularly in hardware cache) */
|
|
IXGB_WRITE_REG(hw, RXDCTL, 0);
|
|
|
|
/* Enable Receive Checksum Offload for TCP and UDP */
|
|
if (adapter->rx_csum) {
|
|
rxcsum = IXGB_READ_REG(hw, RXCSUM);
|
|
rxcsum |= IXGB_RXCSUM_TUOFL;
|
|
IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
|
|
}
|
|
|
|
/* Enable Receives */
|
|
|
|
IXGB_WRITE_REG(hw, RCTL, rctl);
|
|
}
|
|
|
|
/**
|
|
* ixgb_free_tx_resources - Free Tx Resources
|
|
* @adapter: board private structure
|
|
*
|
|
* Free all transmit software resources
|
|
**/
|
|
|
|
void
|
|
ixgb_free_tx_resources(struct ixgb_adapter *adapter)
|
|
{
|
|
struct pci_dev *pdev = adapter->pdev;
|
|
|
|
ixgb_clean_tx_ring(adapter);
|
|
|
|
vfree(adapter->tx_ring.buffer_info);
|
|
adapter->tx_ring.buffer_info = NULL;
|
|
|
|
dma_free_coherent(&pdev->dev, adapter->tx_ring.size,
|
|
adapter->tx_ring.desc, adapter->tx_ring.dma);
|
|
|
|
adapter->tx_ring.desc = NULL;
|
|
}
|
|
|
|
static void
|
|
ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
|
|
struct ixgb_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;
|
|
/* these fields must always be initialized in tx
|
|
* buffer_info->length = 0;
|
|
* buffer_info->next_to_watch = 0; */
|
|
}
|
|
|
|
/**
|
|
* ixgb_clean_tx_ring - Free Tx Buffers
|
|
* @adapter: board private structure
|
|
**/
|
|
|
|
static void
|
|
ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
|
|
{
|
|
struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
|
|
struct ixgb_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];
|
|
ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
|
|
}
|
|
|
|
size = sizeof(struct ixgb_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;
|
|
|
|
IXGB_WRITE_REG(&adapter->hw, TDH, 0);
|
|
IXGB_WRITE_REG(&adapter->hw, TDT, 0);
|
|
}
|
|
|
|
/**
|
|
* ixgb_free_rx_resources - Free Rx Resources
|
|
* @adapter: board private structure
|
|
*
|
|
* Free all receive software resources
|
|
**/
|
|
|
|
void
|
|
ixgb_free_rx_resources(struct ixgb_adapter *adapter)
|
|
{
|
|
struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
|
|
struct pci_dev *pdev = adapter->pdev;
|
|
|
|
ixgb_clean_rx_ring(adapter);
|
|
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* ixgb_clean_rx_ring - Free Rx Buffers
|
|
* @adapter: board private structure
|
|
**/
|
|
|
|
static void
|
|
ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
|
|
{
|
|
struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
|
|
struct ixgb_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) {
|
|
dma_unmap_single(&pdev->dev,
|
|
buffer_info->dma,
|
|
buffer_info->length,
|
|
DMA_FROM_DEVICE);
|
|
buffer_info->dma = 0;
|
|
buffer_info->length = 0;
|
|
}
|
|
|
|
if (buffer_info->skb) {
|
|
dev_kfree_skb(buffer_info->skb);
|
|
buffer_info->skb = NULL;
|
|
}
|
|
}
|
|
|
|
size = sizeof(struct ixgb_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;
|
|
|
|
IXGB_WRITE_REG(&adapter->hw, RDH, 0);
|
|
IXGB_WRITE_REG(&adapter->hw, RDT, 0);
|
|
}
|
|
|
|
/**
|
|
* ixgb_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
|
|
ixgb_set_mac(struct net_device *netdev, void *p)
|
|
{
|
|
struct ixgb_adapter *adapter = netdev_priv(netdev);
|
|
struct sockaddr *addr = p;
|
|
|
|
if (!is_valid_ether_addr(addr->sa_data))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
|
|
|
|
ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ixgb_set_multi - Multicast and Promiscuous mode set
|
|
* @netdev: network interface device structure
|
|
*
|
|
* The set_multi entry point is called whenever the multicast address
|
|
* list or the network interface flags are updated. This routine is
|
|
* responsible for configuring the hardware for proper multicast,
|
|
* promiscuous mode, and all-multi behavior.
|
|
**/
|
|
|
|
static void
|
|
ixgb_set_multi(struct net_device *netdev)
|
|
{
|
|
struct ixgb_adapter *adapter = netdev_priv(netdev);
|
|
struct ixgb_hw *hw = &adapter->hw;
|
|
struct netdev_hw_addr *ha;
|
|
u32 rctl;
|
|
int i;
|
|
|
|
/* Check for Promiscuous and All Multicast modes */
|
|
|
|
rctl = IXGB_READ_REG(hw, RCTL);
|
|
|
|
if (netdev->flags & IFF_PROMISC) {
|
|
rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
|
|
rctl &= ~IXGB_RCTL_VFE;
|
|
} else {
|
|
if (netdev->flags & IFF_ALLMULTI) {
|
|
rctl |= IXGB_RCTL_MPE;
|
|
rctl &= ~IXGB_RCTL_UPE;
|
|
} else {
|
|
rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
|
|
}
|
|
rctl |= IXGB_RCTL_VFE;
|
|
}
|
|
|
|
if (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
|
|
rctl |= IXGB_RCTL_MPE;
|
|
IXGB_WRITE_REG(hw, RCTL, rctl);
|
|
} else {
|
|
u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES *
|
|
IXGB_ETH_LENGTH_OF_ADDRESS];
|
|
|
|
IXGB_WRITE_REG(hw, RCTL, rctl);
|
|
|
|
i = 0;
|
|
netdev_for_each_mc_addr(ha, netdev)
|
|
memcpy(&mta[i++ * IXGB_ETH_LENGTH_OF_ADDRESS],
|
|
ha->addr, IXGB_ETH_LENGTH_OF_ADDRESS);
|
|
|
|
ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ixgb_watchdog - Timer Call-back
|
|
* @data: pointer to netdev cast into an unsigned long
|
|
**/
|
|
|
|
static void
|
|
ixgb_watchdog(unsigned long data)
|
|
{
|
|
struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
|
|
struct net_device *netdev = adapter->netdev;
|
|
struct ixgb_desc_ring *txdr = &adapter->tx_ring;
|
|
|
|
ixgb_check_for_link(&adapter->hw);
|
|
|
|
if (ixgb_check_for_bad_link(&adapter->hw)) {
|
|
/* force the reset path */
|
|
netif_stop_queue(netdev);
|
|
}
|
|
|
|
if (adapter->hw.link_up) {
|
|
if (!netif_carrier_ok(netdev)) {
|
|
netdev_info(netdev,
|
|
"NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n",
|
|
(adapter->hw.fc.type == ixgb_fc_full) ?
|
|
"RX/TX" :
|
|
(adapter->hw.fc.type == ixgb_fc_rx_pause) ?
|
|
"RX" :
|
|
(adapter->hw.fc.type == ixgb_fc_tx_pause) ?
|
|
"TX" : "None");
|
|
adapter->link_speed = 10000;
|
|
adapter->link_duplex = FULL_DUPLEX;
|
|
netif_carrier_on(netdev);
|
|
}
|
|
} else {
|
|
if (netif_carrier_ok(netdev)) {
|
|
adapter->link_speed = 0;
|
|
adapter->link_duplex = 0;
|
|
netdev_info(netdev, "NIC Link is Down\n");
|
|
netif_carrier_off(netdev);
|
|
}
|
|
}
|
|
|
|
ixgb_update_stats(adapter);
|
|
|
|
if (!netif_carrier_ok(netdev)) {
|
|
if (IXGB_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). */
|
|
schedule_work(&adapter->tx_timeout_task);
|
|
/* return immediately since reset is imminent */
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* Force detection of hung controller every watchdog period */
|
|
adapter->detect_tx_hung = true;
|
|
|
|
/* generate an interrupt to force clean up of any stragglers */
|
|
IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
|
|
|
|
/* Reset the timer */
|
|
mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
|
|
}
|
|
|
|
#define IXGB_TX_FLAGS_CSUM 0x00000001
|
|
#define IXGB_TX_FLAGS_VLAN 0x00000002
|
|
#define IXGB_TX_FLAGS_TSO 0x00000004
|
|
|
|
static int
|
|
ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
|
|
{
|
|
struct ixgb_context_desc *context_desc;
|
|
unsigned int i;
|
|
u8 ipcss, ipcso, tucss, tucso, hdr_len;
|
|
u16 ipcse, tucse, mss;
|
|
int err;
|
|
|
|
if (likely(skb_is_gso(skb))) {
|
|
struct ixgb_buffer *buffer_info;
|
|
struct iphdr *iph;
|
|
|
|
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;
|
|
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);
|
|
ipcss = skb_network_offset(skb);
|
|
ipcso = (void *)&(iph->check) - (void *)skb->data;
|
|
ipcse = skb_transport_offset(skb) - 1;
|
|
tucss = skb_transport_offset(skb);
|
|
tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
|
|
tucse = 0;
|
|
|
|
i = adapter->tx_ring.next_to_use;
|
|
context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
|
|
buffer_info = &adapter->tx_ring.buffer_info[i];
|
|
WARN_ON(buffer_info->dma != 0);
|
|
|
|
context_desc->ipcss = ipcss;
|
|
context_desc->ipcso = ipcso;
|
|
context_desc->ipcse = cpu_to_le16(ipcse);
|
|
context_desc->tucss = tucss;
|
|
context_desc->tucso = tucso;
|
|
context_desc->tucse = cpu_to_le16(tucse);
|
|
context_desc->mss = cpu_to_le16(mss);
|
|
context_desc->hdr_len = hdr_len;
|
|
context_desc->status = 0;
|
|
context_desc->cmd_type_len = cpu_to_le32(
|
|
IXGB_CONTEXT_DESC_TYPE
|
|
| IXGB_CONTEXT_DESC_CMD_TSE
|
|
| IXGB_CONTEXT_DESC_CMD_IP
|
|
| IXGB_CONTEXT_DESC_CMD_TCP
|
|
| IXGB_CONTEXT_DESC_CMD_IDE
|
|
| (skb->len - (hdr_len)));
|
|
|
|
|
|
if (++i == adapter->tx_ring.count) i = 0;
|
|
adapter->tx_ring.next_to_use = i;
|
|
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool
|
|
ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
|
|
{
|
|
struct ixgb_context_desc *context_desc;
|
|
unsigned int i;
|
|
u8 css, cso;
|
|
|
|
if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
|
|
struct ixgb_buffer *buffer_info;
|
|
css = skb_transport_offset(skb);
|
|
cso = css + skb->csum_offset;
|
|
|
|
i = adapter->tx_ring.next_to_use;
|
|
context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
|
|
buffer_info = &adapter->tx_ring.buffer_info[i];
|
|
WARN_ON(buffer_info->dma != 0);
|
|
|
|
context_desc->tucss = css;
|
|
context_desc->tucso = cso;
|
|
context_desc->tucse = 0;
|
|
/* zero out any previously existing data in one instruction */
|
|
*(u32 *)&(context_desc->ipcss) = 0;
|
|
context_desc->status = 0;
|
|
context_desc->hdr_len = 0;
|
|
context_desc->mss = 0;
|
|
context_desc->cmd_type_len =
|
|
cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
|
|
| IXGB_TX_DESC_CMD_IDE);
|
|
|
|
if (++i == adapter->tx_ring.count) i = 0;
|
|
adapter->tx_ring.next_to_use = i;
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
#define IXGB_MAX_TXD_PWR 14
|
|
#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
|
|
|
|
static int
|
|
ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
|
|
unsigned int first)
|
|
{
|
|
struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
|
|
struct pci_dev *pdev = adapter->pdev;
|
|
struct ixgb_buffer *buffer_info;
|
|
int len = skb_headlen(skb);
|
|
unsigned int offset = 0, size, count = 0, i;
|
|
unsigned int mss = skb_shinfo(skb)->gso_size;
|
|
unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
|
|
unsigned int f;
|
|
|
|
i = tx_ring->next_to_use;
|
|
|
|
while (len) {
|
|
buffer_info = &tx_ring->buffer_info[i];
|
|
size = min(len, IXGB_MAX_DATA_PER_TXD);
|
|
/* 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;
|
|
|
|
buffer_info->length = size;
|
|
WARN_ON(buffer_info->dma != 0);
|
|
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 = 0;
|
|
|
|
len -= size;
|
|
offset += size;
|
|
count++;
|
|
if (len) {
|
|
i++;
|
|
if (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 (i == tx_ring->count)
|
|
i = 0;
|
|
|
|
buffer_info = &tx_ring->buffer_info[i];
|
|
size = min(len, IXGB_MAX_DATA_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;
|
|
|
|
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 = 0;
|
|
|
|
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];
|
|
ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
|
|
{
|
|
struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
|
|
struct ixgb_tx_desc *tx_desc = NULL;
|
|
struct ixgb_buffer *buffer_info;
|
|
u32 cmd_type_len = adapter->tx_cmd_type;
|
|
u8 status = 0;
|
|
u8 popts = 0;
|
|
unsigned int i;
|
|
|
|
if (tx_flags & IXGB_TX_FLAGS_TSO) {
|
|
cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
|
|
popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
|
|
}
|
|
|
|
if (tx_flags & IXGB_TX_FLAGS_CSUM)
|
|
popts |= IXGB_TX_DESC_POPTS_TXSM;
|
|
|
|
if (tx_flags & IXGB_TX_FLAGS_VLAN)
|
|
cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
|
|
|
|
i = tx_ring->next_to_use;
|
|
|
|
while (count--) {
|
|
buffer_info = &tx_ring->buffer_info[i];
|
|
tx_desc = IXGB_TX_DESC(*tx_ring, i);
|
|
tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
|
|
tx_desc->cmd_type_len =
|
|
cpu_to_le32(cmd_type_len | buffer_info->length);
|
|
tx_desc->status = status;
|
|
tx_desc->popts = popts;
|
|
tx_desc->vlan = cpu_to_le16(vlan_id);
|
|
|
|
if (++i == tx_ring->count) i = 0;
|
|
}
|
|
|
|
tx_desc->cmd_type_len |=
|
|
cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);
|
|
|
|
/* 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;
|
|
IXGB_WRITE_REG(&adapter->hw, TDT, i);
|
|
}
|
|
|
|
static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
|
|
{
|
|
struct ixgb_adapter *adapter = netdev_priv(netdev);
|
|
struct ixgb_desc_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(IXGB_DESC_UNUSED(tx_ring) < size))
|
|
return -EBUSY;
|
|
|
|
/* A reprieve! */
|
|
netif_start_queue(netdev);
|
|
++adapter->restart_queue;
|
|
return 0;
|
|
}
|
|
|
|
static int ixgb_maybe_stop_tx(struct net_device *netdev,
|
|
struct ixgb_desc_ring *tx_ring, int size)
|
|
{
|
|
if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
|
|
return 0;
|
|
return __ixgb_maybe_stop_tx(netdev, size);
|
|
}
|
|
|
|
|
|
/* Tx Descriptors needed, worst case */
|
|
#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
|
|
(((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
|
|
#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
|
|
MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
|
|
+ 1 /* one more needed for sentinel TSO workaround */
|
|
|
|
static netdev_tx_t
|
|
ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
|
|
{
|
|
struct ixgb_adapter *adapter = netdev_priv(netdev);
|
|
unsigned int first;
|
|
unsigned int tx_flags = 0;
|
|
int vlan_id = 0;
|
|
int count = 0;
|
|
int tso;
|
|
|
|
if (test_bit(__IXGB_DOWN, &adapter->flags)) {
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
if (skb->len <= 0) {
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
|
|
DESC_NEEDED)))
|
|
return NETDEV_TX_BUSY;
|
|
|
|
if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
|
|
tx_flags |= IXGB_TX_FLAGS_VLAN;
|
|
vlan_id = vlan_tx_tag_get(skb);
|
|
}
|
|
|
|
first = adapter->tx_ring.next_to_use;
|
|
|
|
tso = ixgb_tso(adapter, skb);
|
|
if (tso < 0) {
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
if (likely(tso))
|
|
tx_flags |= IXGB_TX_FLAGS_TSO;
|
|
else if (ixgb_tx_csum(adapter, skb))
|
|
tx_flags |= IXGB_TX_FLAGS_CSUM;
|
|
|
|
count = ixgb_tx_map(adapter, skb, first);
|
|
|
|
if (count) {
|
|
ixgb_tx_queue(adapter, count, vlan_id, tx_flags);
|
|
/* Make sure there is space in the ring for the next send. */
|
|
ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
|
|
|
|
} else {
|
|
dev_kfree_skb_any(skb);
|
|
adapter->tx_ring.buffer_info[first].time_stamp = 0;
|
|
adapter->tx_ring.next_to_use = first;
|
|
}
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/**
|
|
* ixgb_tx_timeout - Respond to a Tx Hang
|
|
* @netdev: network interface device structure
|
|
**/
|
|
|
|
static void
|
|
ixgb_tx_timeout(struct net_device *netdev)
|
|
{
|
|
struct ixgb_adapter *adapter = netdev_priv(netdev);
|
|
|
|
/* Do the reset outside of interrupt context */
|
|
schedule_work(&adapter->tx_timeout_task);
|
|
}
|
|
|
|
static void
|
|
ixgb_tx_timeout_task(struct work_struct *work)
|
|
{
|
|
struct ixgb_adapter *adapter =
|
|
container_of(work, struct ixgb_adapter, tx_timeout_task);
|
|
|
|
adapter->tx_timeout_count++;
|
|
ixgb_down(adapter, true);
|
|
ixgb_up(adapter);
|
|
}
|
|
|
|
/**
|
|
* ixgb_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 *
|
|
ixgb_get_stats(struct net_device *netdev)
|
|
{
|
|
return &netdev->stats;
|
|
}
|
|
|
|
/**
|
|
* ixgb_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
|
|
ixgb_change_mtu(struct net_device *netdev, int new_mtu)
|
|
{
|
|
struct ixgb_adapter *adapter = netdev_priv(netdev);
|
|
int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
|
|
int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
|
|
|
|
/* MTU < 68 is an error for IPv4 traffic, just don't allow it */
|
|
if ((new_mtu < 68) ||
|
|
(max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
|
|
netif_err(adapter, probe, adapter->netdev,
|
|
"Invalid MTU setting %d\n", new_mtu);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (old_max_frame == max_frame)
|
|
return 0;
|
|
|
|
if (netif_running(netdev))
|
|
ixgb_down(adapter, true);
|
|
|
|
adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
|
|
|
|
netdev->mtu = new_mtu;
|
|
|
|
if (netif_running(netdev))
|
|
ixgb_up(adapter);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ixgb_update_stats - Update the board statistics counters.
|
|
* @adapter: board private structure
|
|
**/
|
|
|
|
void
|
|
ixgb_update_stats(struct ixgb_adapter *adapter)
|
|
{
|
|
struct net_device *netdev = adapter->netdev;
|
|
struct pci_dev *pdev = adapter->pdev;
|
|
|
|
/* Prevent stats update while adapter is being reset */
|
|
if (pci_channel_offline(pdev))
|
|
return;
|
|
|
|
if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
|
|
(netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
|
|
u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
|
|
u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
|
|
u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
|
|
u64 bcast = ((u64)bcast_h << 32) | bcast_l;
|
|
|
|
multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
|
|
/* fix up multicast stats by removing broadcasts */
|
|
if (multi >= bcast)
|
|
multi -= bcast;
|
|
|
|
adapter->stats.mprcl += (multi & 0xFFFFFFFF);
|
|
adapter->stats.mprch += (multi >> 32);
|
|
adapter->stats.bprcl += bcast_l;
|
|
adapter->stats.bprch += bcast_h;
|
|
} else {
|
|
adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
|
|
adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
|
|
adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
|
|
adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
|
|
}
|
|
adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
|
|
adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
|
|
adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
|
|
adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
|
|
adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
|
|
adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
|
|
adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
|
|
adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
|
|
adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
|
|
adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
|
|
adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
|
|
adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
|
|
adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
|
|
adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
|
|
adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
|
|
adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
|
|
adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
|
|
adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
|
|
adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
|
|
adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
|
|
adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
|
|
adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
|
|
adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
|
|
adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
|
|
adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
|
|
adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
|
|
adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
|
|
adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
|
|
adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
|
|
adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
|
|
adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
|
|
adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
|
|
adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
|
|
adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
|
|
adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
|
|
adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
|
|
adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
|
|
adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
|
|
adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
|
|
adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
|
|
adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
|
|
adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
|
|
adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
|
|
adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
|
|
adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
|
|
adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
|
|
adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
|
|
adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
|
|
adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
|
|
adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
|
|
adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
|
|
adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
|
|
adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
|
|
adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
|
|
adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
|
|
adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
|
|
|
|
/* Fill out the OS statistics structure */
|
|
|
|
netdev->stats.rx_packets = adapter->stats.gprcl;
|
|
netdev->stats.tx_packets = adapter->stats.gptcl;
|
|
netdev->stats.rx_bytes = adapter->stats.gorcl;
|
|
netdev->stats.tx_bytes = adapter->stats.gotcl;
|
|
netdev->stats.multicast = adapter->stats.mprcl;
|
|
netdev->stats.collisions = 0;
|
|
|
|
/* ignore RLEC as it reports errors for padded (<64bytes) frames
|
|
* with a length in the type/len field */
|
|
netdev->stats.rx_errors =
|
|
/* adapter->stats.rnbc + */ adapter->stats.crcerrs +
|
|
adapter->stats.ruc +
|
|
adapter->stats.roc /*+ adapter->stats.rlec */ +
|
|
adapter->stats.icbc +
|
|
adapter->stats.ecbc + adapter->stats.mpc;
|
|
|
|
/* see above
|
|
* netdev->stats.rx_length_errors = adapter->stats.rlec;
|
|
*/
|
|
|
|
netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
|
|
netdev->stats.rx_fifo_errors = adapter->stats.mpc;
|
|
netdev->stats.rx_missed_errors = adapter->stats.mpc;
|
|
netdev->stats.rx_over_errors = adapter->stats.mpc;
|
|
|
|
netdev->stats.tx_errors = 0;
|
|
netdev->stats.rx_frame_errors = 0;
|
|
netdev->stats.tx_aborted_errors = 0;
|
|
netdev->stats.tx_carrier_errors = 0;
|
|
netdev->stats.tx_fifo_errors = 0;
|
|
netdev->stats.tx_heartbeat_errors = 0;
|
|
netdev->stats.tx_window_errors = 0;
|
|
}
|
|
|
|
#define IXGB_MAX_INTR 10
|
|
/**
|
|
* ixgb_intr - Interrupt Handler
|
|
* @irq: interrupt number
|
|
* @data: pointer to a network interface device structure
|
|
**/
|
|
|
|
static irqreturn_t
|
|
ixgb_intr(int irq, void *data)
|
|
{
|
|
struct net_device *netdev = data;
|
|
struct ixgb_adapter *adapter = netdev_priv(netdev);
|
|
struct ixgb_hw *hw = &adapter->hw;
|
|
u32 icr = IXGB_READ_REG(hw, ICR);
|
|
|
|
if (unlikely(!icr))
|
|
return IRQ_NONE; /* Not our interrupt */
|
|
|
|
if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
|
|
if (!test_bit(__IXGB_DOWN, &adapter->flags))
|
|
mod_timer(&adapter->watchdog_timer, jiffies);
|
|
|
|
if (napi_schedule_prep(&adapter->napi)) {
|
|
|
|
/* Disable interrupts and register for poll. The flush
|
|
of the posted write is intentionally left out.
|
|
*/
|
|
|
|
IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
|
|
__napi_schedule(&adapter->napi);
|
|
}
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* ixgb_clean - NAPI Rx polling callback
|
|
* @adapter: board private structure
|
|
**/
|
|
|
|
static int
|
|
ixgb_clean(struct napi_struct *napi, int budget)
|
|
{
|
|
struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
|
|
int work_done = 0;
|
|
|
|
ixgb_clean_tx_irq(adapter);
|
|
ixgb_clean_rx_irq(adapter, &work_done, budget);
|
|
|
|
/* If budget not fully consumed, exit the polling mode */
|
|
if (work_done < budget) {
|
|
napi_complete(napi);
|
|
if (!test_bit(__IXGB_DOWN, &adapter->flags))
|
|
ixgb_irq_enable(adapter);
|
|
}
|
|
|
|
return work_done;
|
|
}
|
|
|
|
/**
|
|
* ixgb_clean_tx_irq - Reclaim resources after transmit completes
|
|
* @adapter: board private structure
|
|
**/
|
|
|
|
static bool
|
|
ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
|
|
{
|
|
struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
|
|
struct net_device *netdev = adapter->netdev;
|
|
struct ixgb_tx_desc *tx_desc, *eop_desc;
|
|
struct ixgb_buffer *buffer_info;
|
|
unsigned int i, eop;
|
|
bool cleaned = false;
|
|
|
|
i = tx_ring->next_to_clean;
|
|
eop = tx_ring->buffer_info[i].next_to_watch;
|
|
eop_desc = IXGB_TX_DESC(*tx_ring, eop);
|
|
|
|
while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
|
|
|
|
for (cleaned = false; !cleaned; ) {
|
|
tx_desc = IXGB_TX_DESC(*tx_ring, i);
|
|
buffer_info = &tx_ring->buffer_info[i];
|
|
|
|
if (tx_desc->popts &
|
|
(IXGB_TX_DESC_POPTS_TXSM |
|
|
IXGB_TX_DESC_POPTS_IXSM))
|
|
adapter->hw_csum_tx_good++;
|
|
|
|
ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
|
|
|
|
*(u32 *)&(tx_desc->status) = 0;
|
|
|
|
cleaned = (i == eop);
|
|
if (++i == tx_ring->count) i = 0;
|
|
}
|
|
|
|
eop = tx_ring->buffer_info[i].next_to_watch;
|
|
eop_desc = IXGB_TX_DESC(*tx_ring, eop);
|
|
}
|
|
|
|
tx_ring->next_to_clean = i;
|
|
|
|
if (unlikely(cleaned && netif_carrier_ok(netdev) &&
|
|
IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
|
|
/* Make sure that anybody stopping the queue after this
|
|
* sees the new next_to_clean. */
|
|
smp_mb();
|
|
|
|
if (netif_queue_stopped(netdev) &&
|
|
!(test_bit(__IXGB_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 + HZ)
|
|
&& !(IXGB_READ_REG(&adapter->hw, STATUS) &
|
|
IXGB_STATUS_TXOFF)) {
|
|
/* detected Tx unit hang */
|
|
netif_err(adapter, drv, adapter->netdev,
|
|
"Detected Tx Unit Hang\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",
|
|
IXGB_READ_REG(&adapter->hw, TDH),
|
|
IXGB_READ_REG(&adapter->hw, TDT),
|
|
tx_ring->next_to_use,
|
|
tx_ring->next_to_clean,
|
|
tx_ring->buffer_info[eop].time_stamp,
|
|
eop,
|
|
jiffies,
|
|
eop_desc->status);
|
|
netif_stop_queue(netdev);
|
|
}
|
|
}
|
|
|
|
return cleaned;
|
|
}
|
|
|
|
/**
|
|
* ixgb_rx_checksum - Receive Checksum Offload for 82597.
|
|
* @adapter: board private structure
|
|
* @rx_desc: receive descriptor
|
|
* @sk_buff: socket buffer with received data
|
|
**/
|
|
|
|
static void
|
|
ixgb_rx_checksum(struct ixgb_adapter *adapter,
|
|
struct ixgb_rx_desc *rx_desc,
|
|
struct sk_buff *skb)
|
|
{
|
|
/* Ignore Checksum bit is set OR
|
|
* TCP Checksum has not been calculated
|
|
*/
|
|
if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
|
|
(!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
|
|
skb->ip_summed = CHECKSUM_NONE;
|
|
return;
|
|
}
|
|
|
|
/* At this point we know the hardware did the TCP checksum */
|
|
/* now look at the TCP checksum error bit */
|
|
if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
|
|
/* let the stack verify checksum errors */
|
|
skb->ip_summed = CHECKSUM_NONE;
|
|
adapter->hw_csum_rx_error++;
|
|
} else {
|
|
/* TCP checksum is good */
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
adapter->hw_csum_rx_good++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* this should improve performance for small packets with large amounts
|
|
* of reassembly being done in the stack
|
|
*/
|
|
static void ixgb_check_copybreak(struct net_device *netdev,
|
|
struct ixgb_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;
|
|
}
|
|
|
|
/**
|
|
* ixgb_clean_rx_irq - Send received data up the network stack,
|
|
* @adapter: board private structure
|
|
**/
|
|
|
|
static bool
|
|
ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
|
|
{
|
|
struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
|
|
struct net_device *netdev = adapter->netdev;
|
|
struct pci_dev *pdev = adapter->pdev;
|
|
struct ixgb_rx_desc *rx_desc, *next_rxd;
|
|
struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
|
|
u32 length;
|
|
unsigned int i, j;
|
|
int cleaned_count = 0;
|
|
bool cleaned = false;
|
|
|
|
i = rx_ring->next_to_clean;
|
|
rx_desc = IXGB_RX_DESC(*rx_ring, i);
|
|
buffer_info = &rx_ring->buffer_info[i];
|
|
|
|
while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
|
|
struct sk_buff *skb;
|
|
u8 status;
|
|
|
|
if (*work_done >= work_to_do)
|
|
break;
|
|
|
|
(*work_done)++;
|
|
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 = IXGB_RX_DESC(*rx_ring, i);
|
|
prefetch(next_rxd);
|
|
|
|
j = i + 1;
|
|
if (j == rx_ring->count)
|
|
j = 0;
|
|
next2_buffer = &rx_ring->buffer_info[j];
|
|
prefetch(next2_buffer);
|
|
|
|
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);
|
|
rx_desc->length = 0;
|
|
|
|
if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
|
|
|
|
/* All receives must fit into a single buffer */
|
|
|
|
IXGB_DBG("Receive packet consumed multiple buffers "
|
|
"length<%x>\n", length);
|
|
|
|
dev_kfree_skb_irq(skb);
|
|
goto rxdesc_done;
|
|
}
|
|
|
|
if (unlikely(rx_desc->errors &
|
|
(IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
|
|
IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
|
|
dev_kfree_skb_irq(skb);
|
|
goto rxdesc_done;
|
|
}
|
|
|
|
ixgb_check_copybreak(netdev, buffer_info, length, &skb);
|
|
|
|
/* Good Receive */
|
|
skb_put(skb, length);
|
|
|
|
/* Receive Checksum Offload */
|
|
ixgb_rx_checksum(adapter, rx_desc, skb);
|
|
|
|
skb->protocol = eth_type_trans(skb, netdev);
|
|
if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
|
|
vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
|
|
le16_to_cpu(rx_desc->special));
|
|
} else {
|
|
netif_receive_skb(skb);
|
|
}
|
|
|
|
rxdesc_done:
|
|
/* clean up descriptor, might be written over by hw */
|
|
rx_desc->status = 0;
|
|
|
|
/* return some buffers to hardware, one at a time is too slow */
|
|
if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
|
|
ixgb_alloc_rx_buffers(adapter, cleaned_count);
|
|
cleaned_count = 0;
|
|
}
|
|
|
|
/* use prefetched values */
|
|
rx_desc = next_rxd;
|
|
buffer_info = next_buffer;
|
|
}
|
|
|
|
rx_ring->next_to_clean = i;
|
|
|
|
cleaned_count = IXGB_DESC_UNUSED(rx_ring);
|
|
if (cleaned_count)
|
|
ixgb_alloc_rx_buffers(adapter, cleaned_count);
|
|
|
|
return cleaned;
|
|
}
|
|
|
|
/**
|
|
* ixgb_alloc_rx_buffers - Replace used receive buffers
|
|
* @adapter: address of board private structure
|
|
**/
|
|
|
|
static void
|
|
ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
|
|
{
|
|
struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
|
|
struct net_device *netdev = adapter->netdev;
|
|
struct pci_dev *pdev = adapter->pdev;
|
|
struct ixgb_rx_desc *rx_desc;
|
|
struct ixgb_buffer *buffer_info;
|
|
struct sk_buff *skb;
|
|
unsigned int i;
|
|
long cleancount;
|
|
|
|
i = rx_ring->next_to_use;
|
|
buffer_info = &rx_ring->buffer_info[i];
|
|
cleancount = IXGB_DESC_UNUSED(rx_ring);
|
|
|
|
|
|
/* leave three descriptors unused */
|
|
while (--cleancount > 2 && cleaned_count--) {
|
|
/* recycle! its good for you */
|
|
skb = buffer_info->skb;
|
|
if (skb) {
|
|
skb_trim(skb, 0);
|
|
goto map_skb;
|
|
}
|
|
|
|
skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len);
|
|
if (unlikely(!skb)) {
|
|
/* Better luck next round */
|
|
adapter->alloc_rx_buff_failed++;
|
|
break;
|
|
}
|
|
|
|
buffer_info->skb = skb;
|
|
buffer_info->length = adapter->rx_buffer_len;
|
|
map_skb:
|
|
buffer_info->dma = dma_map_single(&pdev->dev,
|
|
skb->data,
|
|
adapter->rx_buffer_len,
|
|
DMA_FROM_DEVICE);
|
|
|
|
rx_desc = IXGB_RX_DESC(*rx_ring, i);
|
|
rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
|
|
/* guarantee DD bit not set now before h/w gets descriptor
|
|
* this is the rest of the workaround for h/w double
|
|
* writeback. */
|
|
rx_desc->status = 0;
|
|
|
|
|
|
if (++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();
|
|
IXGB_WRITE_REG(&adapter->hw, RDT, i);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
|
|
*
|
|
* @param netdev network interface device structure
|
|
* @param grp indicates to enable or disable tagging/stripping
|
|
**/
|
|
static void
|
|
ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
|
|
{
|
|
struct ixgb_adapter *adapter = netdev_priv(netdev);
|
|
u32 ctrl, rctl;
|
|
|
|
ixgb_irq_disable(adapter);
|
|
adapter->vlgrp = grp;
|
|
|
|
if (grp) {
|
|
/* enable VLAN tag insert/strip */
|
|
ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
|
|
ctrl |= IXGB_CTRL0_VME;
|
|
IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
|
|
|
|
/* enable VLAN receive filtering */
|
|
|
|
rctl = IXGB_READ_REG(&adapter->hw, RCTL);
|
|
rctl &= ~IXGB_RCTL_CFIEN;
|
|
IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
|
|
} else {
|
|
/* disable VLAN tag insert/strip */
|
|
|
|
ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
|
|
ctrl &= ~IXGB_CTRL0_VME;
|
|
IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
|
|
}
|
|
|
|
/* don't enable interrupts unless we are UP */
|
|
if (adapter->netdev->flags & IFF_UP)
|
|
ixgb_irq_enable(adapter);
|
|
}
|
|
|
|
static void
|
|
ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
|
|
{
|
|
struct ixgb_adapter *adapter = netdev_priv(netdev);
|
|
u32 vfta, index;
|
|
|
|
/* add VID to filter table */
|
|
|
|
index = (vid >> 5) & 0x7F;
|
|
vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
|
|
vfta |= (1 << (vid & 0x1F));
|
|
ixgb_write_vfta(&adapter->hw, index, vfta);
|
|
}
|
|
|
|
static void
|
|
ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
|
|
{
|
|
struct ixgb_adapter *adapter = netdev_priv(netdev);
|
|
u32 vfta, index;
|
|
|
|
ixgb_irq_disable(adapter);
|
|
|
|
vlan_group_set_device(adapter->vlgrp, vid, NULL);
|
|
|
|
/* don't enable interrupts unless we are UP */
|
|
if (adapter->netdev->flags & IFF_UP)
|
|
ixgb_irq_enable(adapter);
|
|
|
|
/* remove VID from filter table */
|
|
|
|
index = (vid >> 5) & 0x7F;
|
|
vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
|
|
vfta &= ~(1 << (vid & 0x1F));
|
|
ixgb_write_vfta(&adapter->hw, index, vfta);
|
|
}
|
|
|
|
static void
|
|
ixgb_restore_vlan(struct ixgb_adapter *adapter)
|
|
{
|
|
ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
|
|
|
|
if (adapter->vlgrp) {
|
|
u16 vid;
|
|
for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
|
|
if (!vlan_group_get_device(adapter->vlgrp, vid))
|
|
continue;
|
|
ixgb_vlan_rx_add_vid(adapter->netdev, vid);
|
|
}
|
|
}
|
|
}
|
|
|
|
#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 ixgb_netpoll(struct net_device *dev)
|
|
{
|
|
struct ixgb_adapter *adapter = netdev_priv(dev);
|
|
|
|
disable_irq(adapter->pdev->irq);
|
|
ixgb_intr(adapter->pdev->irq, dev);
|
|
enable_irq(adapter->pdev->irq);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* ixgb_io_error_detected() - called when PCI error is detected
|
|
* @pdev pointer to pci device with error
|
|
* @state pci channel state after error
|
|
*
|
|
* This callback is called by the PCI subsystem whenever
|
|
* a PCI bus error is detected.
|
|
*/
|
|
static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
|
|
enum pci_channel_state state)
|
|
{
|
|
struct net_device *netdev = pci_get_drvdata(pdev);
|
|
struct ixgb_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))
|
|
ixgb_down(adapter, true);
|
|
|
|
pci_disable_device(pdev);
|
|
|
|
/* Request a slot reset. */
|
|
return PCI_ERS_RESULT_NEED_RESET;
|
|
}
|
|
|
|
/**
|
|
* ixgb_io_slot_reset - called after the pci bus has been reset.
|
|
* @pdev pointer to pci device with error
|
|
*
|
|
* This callback is called after the PCI bus has been reset.
|
|
* Basically, this tries to restart the card from scratch.
|
|
* This is a shortened version of the device probe/discovery code,
|
|
* it resembles the first-half of the ixgb_probe() routine.
|
|
*/
|
|
static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
|
|
{
|
|
struct net_device *netdev = pci_get_drvdata(pdev);
|
|
struct ixgb_adapter *adapter = netdev_priv(netdev);
|
|
|
|
if (pci_enable_device(pdev)) {
|
|
netif_err(adapter, probe, adapter->netdev,
|
|
"Cannot re-enable PCI device after reset\n");
|
|
return PCI_ERS_RESULT_DISCONNECT;
|
|
}
|
|
|
|
/* Perform card reset only on one instance of the card */
|
|
if (0 != PCI_FUNC (pdev->devfn))
|
|
return PCI_ERS_RESULT_RECOVERED;
|
|
|
|
pci_set_master(pdev);
|
|
|
|
netif_carrier_off(netdev);
|
|
netif_stop_queue(netdev);
|
|
ixgb_reset(adapter);
|
|
|
|
/* Make sure the EEPROM is good */
|
|
if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
|
|
netif_err(adapter, probe, adapter->netdev,
|
|
"After reset, the EEPROM checksum is not valid\n");
|
|
return PCI_ERS_RESULT_DISCONNECT;
|
|
}
|
|
ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
|
|
memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
|
|
|
|
if (!is_valid_ether_addr(netdev->perm_addr)) {
|
|
netif_err(adapter, probe, adapter->netdev,
|
|
"After reset, invalid MAC address\n");
|
|
return PCI_ERS_RESULT_DISCONNECT;
|
|
}
|
|
|
|
return PCI_ERS_RESULT_RECOVERED;
|
|
}
|
|
|
|
/**
|
|
* ixgb_io_resume - called when its OK to resume normal operations
|
|
* @pdev pointer to pci device with error
|
|
*
|
|
* The error recovery driver tells us that its OK to resume
|
|
* normal operation. Implementation resembles the second-half
|
|
* of the ixgb_probe() routine.
|
|
*/
|
|
static void ixgb_io_resume(struct pci_dev *pdev)
|
|
{
|
|
struct net_device *netdev = pci_get_drvdata(pdev);
|
|
struct ixgb_adapter *adapter = netdev_priv(netdev);
|
|
|
|
pci_set_master(pdev);
|
|
|
|
if (netif_running(netdev)) {
|
|
if (ixgb_up(adapter)) {
|
|
pr_err("can't bring device back up after reset\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
netif_device_attach(netdev);
|
|
mod_timer(&adapter->watchdog_timer, jiffies);
|
|
}
|
|
|
|
/* ixgb_main.c */
|