4892 lines
130 KiB
C
4892 lines
130 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 1999 - 2018 Intel Corporation. */
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/******************************************************************************
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Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code
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******************************************************************************/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/types.h>
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#include <linux/bitops.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/netdevice.h>
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#include <linux/vmalloc.h>
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#include <linux/string.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/tcp.h>
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#include <linux/sctp.h>
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#include <linux/ipv6.h>
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#include <linux/slab.h>
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#include <net/checksum.h>
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#include <net/ip6_checksum.h>
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#include <linux/ethtool.h>
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#include <linux/if.h>
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#include <linux/if_vlan.h>
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#include <linux/prefetch.h>
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#include <net/mpls.h>
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#include <linux/bpf.h>
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#include <linux/bpf_trace.h>
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#include <linux/atomic.h>
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#include "ixgbevf.h"
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const char ixgbevf_driver_name[] = "ixgbevf";
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static const char ixgbevf_driver_string[] =
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"Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver";
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#define DRV_VERSION "4.1.0-k"
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const char ixgbevf_driver_version[] = DRV_VERSION;
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static char ixgbevf_copyright[] =
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"Copyright (c) 2009 - 2015 Intel Corporation.";
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static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
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[board_82599_vf] = &ixgbevf_82599_vf_info,
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[board_82599_vf_hv] = &ixgbevf_82599_vf_hv_info,
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[board_X540_vf] = &ixgbevf_X540_vf_info,
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[board_X540_vf_hv] = &ixgbevf_X540_vf_hv_info,
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[board_X550_vf] = &ixgbevf_X550_vf_info,
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[board_X550_vf_hv] = &ixgbevf_X550_vf_hv_info,
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[board_X550EM_x_vf] = &ixgbevf_X550EM_x_vf_info,
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[board_X550EM_x_vf_hv] = &ixgbevf_X550EM_x_vf_hv_info,
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[board_x550em_a_vf] = &ixgbevf_x550em_a_vf_info,
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};
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/* ixgbevf_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 const struct pci_device_id ixgbevf_pci_tbl[] = {
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{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), board_82599_vf },
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{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF_HV), board_82599_vf_hv },
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{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF), board_X540_vf },
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{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF_HV), board_X540_vf_hv },
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{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF), board_X550_vf },
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{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF_HV), board_X550_vf_hv },
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{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF), board_X550EM_x_vf },
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{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF_HV), board_X550EM_x_vf_hv},
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{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_VF), board_x550em_a_vf },
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/* required last entry */
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{0, }
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};
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MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
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MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
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MODULE_DESCRIPTION("Intel(R) 10 Gigabit Virtual Function Network Driver");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_VERSION);
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#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
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static int debug = -1;
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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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static struct workqueue_struct *ixgbevf_wq;
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static void ixgbevf_service_event_schedule(struct ixgbevf_adapter *adapter)
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{
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if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
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!test_bit(__IXGBEVF_REMOVING, &adapter->state) &&
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!test_and_set_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state))
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queue_work(ixgbevf_wq, &adapter->service_task);
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}
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static void ixgbevf_service_event_complete(struct ixgbevf_adapter *adapter)
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{
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BUG_ON(!test_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state));
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/* flush memory to make sure state is correct before next watchdog */
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smp_mb__before_atomic();
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clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
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}
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/* forward decls */
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static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter);
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static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector);
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static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter);
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static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer);
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static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,
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struct ixgbevf_rx_buffer *old_buff);
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static void ixgbevf_remove_adapter(struct ixgbe_hw *hw)
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{
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struct ixgbevf_adapter *adapter = hw->back;
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if (!hw->hw_addr)
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return;
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hw->hw_addr = NULL;
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dev_err(&adapter->pdev->dev, "Adapter removed\n");
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if (test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
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ixgbevf_service_event_schedule(adapter);
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}
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static void ixgbevf_check_remove(struct ixgbe_hw *hw, u32 reg)
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{
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u32 value;
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/* The following check not only optimizes a bit by not
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* performing a read on the status register when the
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* register just read was a status register read that
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* returned IXGBE_FAILED_READ_REG. It also blocks any
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* potential recursion.
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*/
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if (reg == IXGBE_VFSTATUS) {
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ixgbevf_remove_adapter(hw);
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return;
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}
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value = ixgbevf_read_reg(hw, IXGBE_VFSTATUS);
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if (value == IXGBE_FAILED_READ_REG)
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ixgbevf_remove_adapter(hw);
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}
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u32 ixgbevf_read_reg(struct ixgbe_hw *hw, u32 reg)
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{
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u8 __iomem *reg_addr = READ_ONCE(hw->hw_addr);
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u32 value;
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if (IXGBE_REMOVED(reg_addr))
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return IXGBE_FAILED_READ_REG;
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value = readl(reg_addr + reg);
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if (unlikely(value == IXGBE_FAILED_READ_REG))
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ixgbevf_check_remove(hw, reg);
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return value;
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}
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/**
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* ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
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* @adapter: pointer to adapter struct
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* @direction: 0 for Rx, 1 for Tx, -1 for other causes
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* @queue: queue to map the corresponding interrupt to
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* @msix_vector: the vector to map to the corresponding queue
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**/
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static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
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u8 queue, u8 msix_vector)
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{
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u32 ivar, index;
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struct ixgbe_hw *hw = &adapter->hw;
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if (direction == -1) {
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/* other causes */
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msix_vector |= IXGBE_IVAR_ALLOC_VAL;
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ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
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ivar &= ~0xFF;
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ivar |= msix_vector;
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IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
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} else {
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/* Tx or Rx causes */
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msix_vector |= IXGBE_IVAR_ALLOC_VAL;
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index = ((16 * (queue & 1)) + (8 * direction));
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ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
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ivar &= ~(0xFF << index);
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ivar |= (msix_vector << index);
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IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
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}
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}
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static u64 ixgbevf_get_tx_completed(struct ixgbevf_ring *ring)
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{
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return ring->stats.packets;
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}
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static u32 ixgbevf_get_tx_pending(struct ixgbevf_ring *ring)
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{
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struct ixgbevf_adapter *adapter = netdev_priv(ring->netdev);
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struct ixgbe_hw *hw = &adapter->hw;
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u32 head = IXGBE_READ_REG(hw, IXGBE_VFTDH(ring->reg_idx));
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u32 tail = IXGBE_READ_REG(hw, IXGBE_VFTDT(ring->reg_idx));
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if (head != tail)
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return (head < tail) ?
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tail - head : (tail + ring->count - head);
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return 0;
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}
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static inline bool ixgbevf_check_tx_hang(struct ixgbevf_ring *tx_ring)
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{
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u32 tx_done = ixgbevf_get_tx_completed(tx_ring);
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u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
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u32 tx_pending = ixgbevf_get_tx_pending(tx_ring);
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clear_check_for_tx_hang(tx_ring);
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/* Check for a hung queue, but be thorough. This verifies
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* that a transmit has been completed since the previous
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* check AND there is at least one packet pending. The
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* ARMED bit is set to indicate a potential hang.
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*/
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if ((tx_done_old == tx_done) && tx_pending) {
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/* make sure it is true for two checks in a row */
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return test_and_set_bit(__IXGBEVF_HANG_CHECK_ARMED,
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&tx_ring->state);
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}
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/* reset the countdown */
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clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &tx_ring->state);
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/* update completed stats and continue */
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tx_ring->tx_stats.tx_done_old = tx_done;
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return false;
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}
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static void ixgbevf_tx_timeout_reset(struct ixgbevf_adapter *adapter)
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{
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/* Do the reset outside of interrupt context */
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if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
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set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);
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ixgbevf_service_event_schedule(adapter);
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}
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}
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/**
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* ixgbevf_tx_timeout - Respond to a Tx Hang
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* @netdev: network interface device structure
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**/
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static void ixgbevf_tx_timeout(struct net_device *netdev)
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{
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struct ixgbevf_adapter *adapter = netdev_priv(netdev);
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ixgbevf_tx_timeout_reset(adapter);
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}
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/**
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* ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
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* @q_vector: board private structure
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* @tx_ring: tx ring to clean
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* @napi_budget: Used to determine if we are in netpoll
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**/
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static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
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struct ixgbevf_ring *tx_ring, int napi_budget)
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{
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struct ixgbevf_adapter *adapter = q_vector->adapter;
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struct ixgbevf_tx_buffer *tx_buffer;
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union ixgbe_adv_tx_desc *tx_desc;
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unsigned int total_bytes = 0, total_packets = 0;
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unsigned int budget = tx_ring->count / 2;
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unsigned int i = tx_ring->next_to_clean;
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if (test_bit(__IXGBEVF_DOWN, &adapter->state))
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return true;
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tx_buffer = &tx_ring->tx_buffer_info[i];
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tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
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i -= tx_ring->count;
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do {
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union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
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/* if next_to_watch is not set then there is no work pending */
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if (!eop_desc)
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break;
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/* prevent any other reads prior to eop_desc */
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smp_rmb();
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/* if DD is not set pending work has not been completed */
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if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
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break;
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/* clear next_to_watch to prevent false hangs */
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tx_buffer->next_to_watch = NULL;
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/* update the statistics for this packet */
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total_bytes += tx_buffer->bytecount;
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total_packets += tx_buffer->gso_segs;
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/* free the skb */
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if (ring_is_xdp(tx_ring))
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page_frag_free(tx_buffer->data);
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else
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napi_consume_skb(tx_buffer->skb, napi_budget);
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/* unmap skb header data */
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dma_unmap_single(tx_ring->dev,
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dma_unmap_addr(tx_buffer, dma),
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dma_unmap_len(tx_buffer, len),
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DMA_TO_DEVICE);
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/* clear tx_buffer data */
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dma_unmap_len_set(tx_buffer, len, 0);
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/* unmap remaining buffers */
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while (tx_desc != eop_desc) {
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tx_buffer++;
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tx_desc++;
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i++;
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if (unlikely(!i)) {
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i -= tx_ring->count;
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tx_buffer = tx_ring->tx_buffer_info;
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tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
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}
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/* unmap any remaining paged data */
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if (dma_unmap_len(tx_buffer, len)) {
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dma_unmap_page(tx_ring->dev,
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dma_unmap_addr(tx_buffer, dma),
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dma_unmap_len(tx_buffer, len),
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DMA_TO_DEVICE);
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dma_unmap_len_set(tx_buffer, len, 0);
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}
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}
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/* move us one more past the eop_desc for start of next pkt */
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tx_buffer++;
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tx_desc++;
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i++;
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if (unlikely(!i)) {
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i -= tx_ring->count;
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tx_buffer = tx_ring->tx_buffer_info;
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tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
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}
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/* issue prefetch for next Tx descriptor */
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prefetch(tx_desc);
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/* update budget accounting */
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budget--;
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} while (likely(budget));
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i += tx_ring->count;
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tx_ring->next_to_clean = i;
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u64_stats_update_begin(&tx_ring->syncp);
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tx_ring->stats.bytes += total_bytes;
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tx_ring->stats.packets += total_packets;
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u64_stats_update_end(&tx_ring->syncp);
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q_vector->tx.total_bytes += total_bytes;
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q_vector->tx.total_packets += total_packets;
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if (check_for_tx_hang(tx_ring) && ixgbevf_check_tx_hang(tx_ring)) {
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struct ixgbe_hw *hw = &adapter->hw;
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union ixgbe_adv_tx_desc *eop_desc;
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eop_desc = tx_ring->tx_buffer_info[i].next_to_watch;
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pr_err("Detected Tx Unit Hang%s\n"
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" Tx Queue <%d>\n"
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" TDH, TDT <%x>, <%x>\n"
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" next_to_use <%x>\n"
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" next_to_clean <%x>\n"
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"tx_buffer_info[next_to_clean]\n"
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" next_to_watch <%p>\n"
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" eop_desc->wb.status <%x>\n"
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" time_stamp <%lx>\n"
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" jiffies <%lx>\n",
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ring_is_xdp(tx_ring) ? " XDP" : "",
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tx_ring->queue_index,
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IXGBE_READ_REG(hw, IXGBE_VFTDH(tx_ring->reg_idx)),
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IXGBE_READ_REG(hw, IXGBE_VFTDT(tx_ring->reg_idx)),
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tx_ring->next_to_use, i,
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eop_desc, (eop_desc ? eop_desc->wb.status : 0),
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tx_ring->tx_buffer_info[i].time_stamp, jiffies);
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if (!ring_is_xdp(tx_ring))
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netif_stop_subqueue(tx_ring->netdev,
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tx_ring->queue_index);
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/* schedule immediate reset if we believe we hung */
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ixgbevf_tx_timeout_reset(adapter);
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return true;
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}
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if (ring_is_xdp(tx_ring))
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return !!budget;
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#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
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if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
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(ixgbevf_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
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/* Make sure that anybody stopping the queue after this
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* sees the new next_to_clean.
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*/
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smp_mb();
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if (__netif_subqueue_stopped(tx_ring->netdev,
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tx_ring->queue_index) &&
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!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
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netif_wake_subqueue(tx_ring->netdev,
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tx_ring->queue_index);
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++tx_ring->tx_stats.restart_queue;
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}
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}
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return !!budget;
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}
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/**
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* ixgbevf_rx_skb - Helper function to determine proper Rx method
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* @q_vector: structure containing interrupt and ring information
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* @skb: packet to send up
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**/
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static void ixgbevf_rx_skb(struct ixgbevf_q_vector *q_vector,
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struct sk_buff *skb)
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{
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napi_gro_receive(&q_vector->napi, skb);
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}
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#define IXGBE_RSS_L4_TYPES_MASK \
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((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
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(1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
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(1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
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(1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
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static inline void ixgbevf_rx_hash(struct ixgbevf_ring *ring,
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union ixgbe_adv_rx_desc *rx_desc,
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struct sk_buff *skb)
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{
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u16 rss_type;
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|
|
if (!(ring->netdev->features & NETIF_F_RXHASH))
|
|
return;
|
|
|
|
rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) &
|
|
IXGBE_RXDADV_RSSTYPE_MASK;
|
|
|
|
if (!rss_type)
|
|
return;
|
|
|
|
skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
|
|
(IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?
|
|
PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
|
|
* @ring: structure containig ring specific data
|
|
* @rx_desc: current Rx descriptor being processed
|
|
* @skb: skb currently being received and modified
|
|
**/
|
|
static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,
|
|
union ixgbe_adv_rx_desc *rx_desc,
|
|
struct sk_buff *skb)
|
|
{
|
|
skb_checksum_none_assert(skb);
|
|
|
|
/* Rx csum disabled */
|
|
if (!(ring->netdev->features & NETIF_F_RXCSUM))
|
|
return;
|
|
|
|
/* if IP and error */
|
|
if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
|
|
ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
|
|
ring->rx_stats.csum_err++;
|
|
return;
|
|
}
|
|
|
|
if (!ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
|
|
return;
|
|
|
|
if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
|
|
ring->rx_stats.csum_err++;
|
|
return;
|
|
}
|
|
|
|
/* It must be a TCP or UDP packet with a valid checksum */
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_process_skb_fields - Populate skb header fields from Rx descriptor
|
|
* @rx_ring: rx descriptor ring packet is being transacted on
|
|
* @rx_desc: pointer to the EOP Rx descriptor
|
|
* @skb: pointer to current skb being populated
|
|
*
|
|
* This function checks the ring, descriptor, and packet information in
|
|
* order to populate the checksum, VLAN, protocol, and other fields within
|
|
* the skb.
|
|
**/
|
|
static void ixgbevf_process_skb_fields(struct ixgbevf_ring *rx_ring,
|
|
union ixgbe_adv_rx_desc *rx_desc,
|
|
struct sk_buff *skb)
|
|
{
|
|
ixgbevf_rx_hash(rx_ring, rx_desc, skb);
|
|
ixgbevf_rx_checksum(rx_ring, rx_desc, skb);
|
|
|
|
if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
|
|
u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
|
|
unsigned long *active_vlans = netdev_priv(rx_ring->netdev);
|
|
|
|
if (test_bit(vid & VLAN_VID_MASK, active_vlans))
|
|
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
|
|
}
|
|
|
|
skb->protocol = eth_type_trans(skb, rx_ring->netdev);
|
|
}
|
|
|
|
static
|
|
struct ixgbevf_rx_buffer *ixgbevf_get_rx_buffer(struct ixgbevf_ring *rx_ring,
|
|
const unsigned int size)
|
|
{
|
|
struct ixgbevf_rx_buffer *rx_buffer;
|
|
|
|
rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
|
|
prefetchw(rx_buffer->page);
|
|
|
|
/* we are reusing so sync this buffer for CPU use */
|
|
dma_sync_single_range_for_cpu(rx_ring->dev,
|
|
rx_buffer->dma,
|
|
rx_buffer->page_offset,
|
|
size,
|
|
DMA_FROM_DEVICE);
|
|
|
|
rx_buffer->pagecnt_bias--;
|
|
|
|
return rx_buffer;
|
|
}
|
|
|
|
static void ixgbevf_put_rx_buffer(struct ixgbevf_ring *rx_ring,
|
|
struct ixgbevf_rx_buffer *rx_buffer,
|
|
struct sk_buff *skb)
|
|
{
|
|
if (ixgbevf_can_reuse_rx_page(rx_buffer)) {
|
|
/* hand second half of page back to the ring */
|
|
ixgbevf_reuse_rx_page(rx_ring, rx_buffer);
|
|
} else {
|
|
if (IS_ERR(skb))
|
|
/* We are not reusing the buffer so unmap it and free
|
|
* any references we are holding to it
|
|
*/
|
|
dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma,
|
|
ixgbevf_rx_pg_size(rx_ring),
|
|
DMA_FROM_DEVICE,
|
|
IXGBEVF_RX_DMA_ATTR);
|
|
__page_frag_cache_drain(rx_buffer->page,
|
|
rx_buffer->pagecnt_bias);
|
|
}
|
|
|
|
/* clear contents of rx_buffer */
|
|
rx_buffer->page = NULL;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_is_non_eop - process handling of non-EOP buffers
|
|
* @rx_ring: Rx ring being processed
|
|
* @rx_desc: Rx descriptor for current buffer
|
|
*
|
|
* This function updates next to clean. If the buffer is an EOP buffer
|
|
* this function exits returning false, otherwise it will place the
|
|
* sk_buff in the next buffer to be chained and return true indicating
|
|
* that this is in fact a non-EOP buffer.
|
|
**/
|
|
static bool ixgbevf_is_non_eop(struct ixgbevf_ring *rx_ring,
|
|
union ixgbe_adv_rx_desc *rx_desc)
|
|
{
|
|
u32 ntc = rx_ring->next_to_clean + 1;
|
|
|
|
/* fetch, update, and store next to clean */
|
|
ntc = (ntc < rx_ring->count) ? ntc : 0;
|
|
rx_ring->next_to_clean = ntc;
|
|
|
|
prefetch(IXGBEVF_RX_DESC(rx_ring, ntc));
|
|
|
|
if (likely(ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static inline unsigned int ixgbevf_rx_offset(struct ixgbevf_ring *rx_ring)
|
|
{
|
|
return ring_uses_build_skb(rx_ring) ? IXGBEVF_SKB_PAD : 0;
|
|
}
|
|
|
|
static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring *rx_ring,
|
|
struct ixgbevf_rx_buffer *bi)
|
|
{
|
|
struct page *page = bi->page;
|
|
dma_addr_t dma;
|
|
|
|
/* since we are recycling buffers we should seldom need to alloc */
|
|
if (likely(page))
|
|
return true;
|
|
|
|
/* alloc new page for storage */
|
|
page = dev_alloc_pages(ixgbevf_rx_pg_order(rx_ring));
|
|
if (unlikely(!page)) {
|
|
rx_ring->rx_stats.alloc_rx_page_failed++;
|
|
return false;
|
|
}
|
|
|
|
/* map page for use */
|
|
dma = dma_map_page_attrs(rx_ring->dev, page, 0,
|
|
ixgbevf_rx_pg_size(rx_ring),
|
|
DMA_FROM_DEVICE, IXGBEVF_RX_DMA_ATTR);
|
|
|
|
/* if mapping failed free memory back to system since
|
|
* there isn't much point in holding memory we can't use
|
|
*/
|
|
if (dma_mapping_error(rx_ring->dev, dma)) {
|
|
__free_pages(page, ixgbevf_rx_pg_order(rx_ring));
|
|
|
|
rx_ring->rx_stats.alloc_rx_page_failed++;
|
|
return false;
|
|
}
|
|
|
|
bi->dma = dma;
|
|
bi->page = page;
|
|
bi->page_offset = ixgbevf_rx_offset(rx_ring);
|
|
bi->pagecnt_bias = 1;
|
|
rx_ring->rx_stats.alloc_rx_page++;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
|
|
* @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on
|
|
* @cleaned_count: number of buffers to replace
|
|
**/
|
|
static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring *rx_ring,
|
|
u16 cleaned_count)
|
|
{
|
|
union ixgbe_adv_rx_desc *rx_desc;
|
|
struct ixgbevf_rx_buffer *bi;
|
|
unsigned int i = rx_ring->next_to_use;
|
|
|
|
/* nothing to do or no valid netdev defined */
|
|
if (!cleaned_count || !rx_ring->netdev)
|
|
return;
|
|
|
|
rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
|
|
bi = &rx_ring->rx_buffer_info[i];
|
|
i -= rx_ring->count;
|
|
|
|
do {
|
|
if (!ixgbevf_alloc_mapped_page(rx_ring, bi))
|
|
break;
|
|
|
|
/* sync the buffer for use by the device */
|
|
dma_sync_single_range_for_device(rx_ring->dev, bi->dma,
|
|
bi->page_offset,
|
|
ixgbevf_rx_bufsz(rx_ring),
|
|
DMA_FROM_DEVICE);
|
|
|
|
/* Refresh the desc even if pkt_addr didn't change
|
|
* because each write-back erases this info.
|
|
*/
|
|
rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
|
|
|
|
rx_desc++;
|
|
bi++;
|
|
i++;
|
|
if (unlikely(!i)) {
|
|
rx_desc = IXGBEVF_RX_DESC(rx_ring, 0);
|
|
bi = rx_ring->rx_buffer_info;
|
|
i -= rx_ring->count;
|
|
}
|
|
|
|
/* clear the length for the next_to_use descriptor */
|
|
rx_desc->wb.upper.length = 0;
|
|
|
|
cleaned_count--;
|
|
} while (cleaned_count);
|
|
|
|
i += rx_ring->count;
|
|
|
|
if (rx_ring->next_to_use != i) {
|
|
/* record the next descriptor to use */
|
|
rx_ring->next_to_use = i;
|
|
|
|
/* update next to alloc since we have filled the ring */
|
|
rx_ring->next_to_alloc = i;
|
|
|
|
/* Force memory writes to complete before letting h/w
|
|
* know there are new descriptors to fetch. (Only
|
|
* applicable for weak-ordered memory model archs,
|
|
* such as IA-64).
|
|
*/
|
|
wmb();
|
|
ixgbevf_write_tail(rx_ring, i);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_cleanup_headers - Correct corrupted or empty headers
|
|
* @rx_ring: rx descriptor ring packet is being transacted on
|
|
* @rx_desc: pointer to the EOP Rx descriptor
|
|
* @skb: pointer to current skb being fixed
|
|
*
|
|
* Check for corrupted packet headers caused by senders on the local L2
|
|
* embedded NIC switch not setting up their Tx Descriptors right. These
|
|
* should be very rare.
|
|
*
|
|
* Also address the case where we are pulling data in on pages only
|
|
* and as such no data is present in the skb header.
|
|
*
|
|
* In addition if skb is not at least 60 bytes we need to pad it so that
|
|
* it is large enough to qualify as a valid Ethernet frame.
|
|
*
|
|
* Returns true if an error was encountered and skb was freed.
|
|
**/
|
|
static bool ixgbevf_cleanup_headers(struct ixgbevf_ring *rx_ring,
|
|
union ixgbe_adv_rx_desc *rx_desc,
|
|
struct sk_buff *skb)
|
|
{
|
|
/* XDP packets use error pointer so abort at this point */
|
|
if (IS_ERR(skb))
|
|
return true;
|
|
|
|
/* verify that the packet does not have any known errors */
|
|
if (unlikely(ixgbevf_test_staterr(rx_desc,
|
|
IXGBE_RXDADV_ERR_FRAME_ERR_MASK))) {
|
|
struct net_device *netdev = rx_ring->netdev;
|
|
|
|
if (!(netdev->features & NETIF_F_RXALL)) {
|
|
dev_kfree_skb_any(skb);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/* if eth_skb_pad returns an error the skb was freed */
|
|
if (eth_skb_pad(skb))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_reuse_rx_page - page flip buffer and store it back on the ring
|
|
* @rx_ring: rx descriptor ring to store buffers on
|
|
* @old_buff: donor buffer to have page reused
|
|
*
|
|
* Synchronizes page for reuse by the adapter
|
|
**/
|
|
static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,
|
|
struct ixgbevf_rx_buffer *old_buff)
|
|
{
|
|
struct ixgbevf_rx_buffer *new_buff;
|
|
u16 nta = rx_ring->next_to_alloc;
|
|
|
|
new_buff = &rx_ring->rx_buffer_info[nta];
|
|
|
|
/* update, and store next to alloc */
|
|
nta++;
|
|
rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
|
|
|
|
/* transfer page from old buffer to new buffer */
|
|
new_buff->page = old_buff->page;
|
|
new_buff->dma = old_buff->dma;
|
|
new_buff->page_offset = old_buff->page_offset;
|
|
new_buff->pagecnt_bias = old_buff->pagecnt_bias;
|
|
}
|
|
|
|
static inline bool ixgbevf_page_is_reserved(struct page *page)
|
|
{
|
|
return (page_to_nid(page) != numa_mem_id()) || page_is_pfmemalloc(page);
|
|
}
|
|
|
|
static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer)
|
|
{
|
|
unsigned int pagecnt_bias = rx_buffer->pagecnt_bias;
|
|
struct page *page = rx_buffer->page;
|
|
|
|
/* avoid re-using remote pages */
|
|
if (unlikely(ixgbevf_page_is_reserved(page)))
|
|
return false;
|
|
|
|
#if (PAGE_SIZE < 8192)
|
|
/* if we are only owner of page we can reuse it */
|
|
if (unlikely((page_ref_count(page) - pagecnt_bias) > 1))
|
|
return false;
|
|
#else
|
|
#define IXGBEVF_LAST_OFFSET \
|
|
(SKB_WITH_OVERHEAD(PAGE_SIZE) - IXGBEVF_RXBUFFER_2048)
|
|
|
|
if (rx_buffer->page_offset > IXGBEVF_LAST_OFFSET)
|
|
return false;
|
|
|
|
#endif
|
|
|
|
/* If we have drained the page fragment pool we need to update
|
|
* the pagecnt_bias and page count so that we fully restock the
|
|
* number of references the driver holds.
|
|
*/
|
|
if (unlikely(!pagecnt_bias)) {
|
|
page_ref_add(page, USHRT_MAX);
|
|
rx_buffer->pagecnt_bias = USHRT_MAX;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_add_rx_frag - Add contents of Rx buffer to sk_buff
|
|
* @rx_ring: rx descriptor ring to transact packets on
|
|
* @rx_buffer: buffer containing page to add
|
|
* @skb: sk_buff to place the data into
|
|
* @size: size of buffer to be added
|
|
*
|
|
* This function will add the data contained in rx_buffer->page to the skb.
|
|
**/
|
|
static void ixgbevf_add_rx_frag(struct ixgbevf_ring *rx_ring,
|
|
struct ixgbevf_rx_buffer *rx_buffer,
|
|
struct sk_buff *skb,
|
|
unsigned int size)
|
|
{
|
|
#if (PAGE_SIZE < 8192)
|
|
unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
|
|
#else
|
|
unsigned int truesize = ring_uses_build_skb(rx_ring) ?
|
|
SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) :
|
|
SKB_DATA_ALIGN(size);
|
|
#endif
|
|
skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_buffer->page,
|
|
rx_buffer->page_offset, size, truesize);
|
|
#if (PAGE_SIZE < 8192)
|
|
rx_buffer->page_offset ^= truesize;
|
|
#else
|
|
rx_buffer->page_offset += truesize;
|
|
#endif
|
|
}
|
|
|
|
static
|
|
struct sk_buff *ixgbevf_construct_skb(struct ixgbevf_ring *rx_ring,
|
|
struct ixgbevf_rx_buffer *rx_buffer,
|
|
struct xdp_buff *xdp,
|
|
union ixgbe_adv_rx_desc *rx_desc)
|
|
{
|
|
unsigned int size = xdp->data_end - xdp->data;
|
|
#if (PAGE_SIZE < 8192)
|
|
unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
|
|
#else
|
|
unsigned int truesize = SKB_DATA_ALIGN(xdp->data_end -
|
|
xdp->data_hard_start);
|
|
#endif
|
|
unsigned int headlen;
|
|
struct sk_buff *skb;
|
|
|
|
/* prefetch first cache line of first page */
|
|
prefetch(xdp->data);
|
|
#if L1_CACHE_BYTES < 128
|
|
prefetch(xdp->data + L1_CACHE_BYTES);
|
|
#endif
|
|
/* Note, we get here by enabling legacy-rx via:
|
|
*
|
|
* ethtool --set-priv-flags <dev> legacy-rx on
|
|
*
|
|
* In this mode, we currently get 0 extra XDP headroom as
|
|
* opposed to having legacy-rx off, where we process XDP
|
|
* packets going to stack via ixgbevf_build_skb().
|
|
*
|
|
* For ixgbevf_construct_skb() mode it means that the
|
|
* xdp->data_meta will always point to xdp->data, since
|
|
* the helper cannot expand the head. Should this ever
|
|
* changed in future for legacy-rx mode on, then lets also
|
|
* add xdp->data_meta handling here.
|
|
*/
|
|
|
|
/* allocate a skb to store the frags */
|
|
skb = napi_alloc_skb(&rx_ring->q_vector->napi, IXGBEVF_RX_HDR_SIZE);
|
|
if (unlikely(!skb))
|
|
return NULL;
|
|
|
|
/* Determine available headroom for copy */
|
|
headlen = size;
|
|
if (headlen > IXGBEVF_RX_HDR_SIZE)
|
|
headlen = eth_get_headlen(xdp->data, IXGBEVF_RX_HDR_SIZE);
|
|
|
|
/* align pull length to size of long to optimize memcpy performance */
|
|
memcpy(__skb_put(skb, headlen), xdp->data,
|
|
ALIGN(headlen, sizeof(long)));
|
|
|
|
/* update all of the pointers */
|
|
size -= headlen;
|
|
if (size) {
|
|
skb_add_rx_frag(skb, 0, rx_buffer->page,
|
|
(xdp->data + headlen) -
|
|
page_address(rx_buffer->page),
|
|
size, truesize);
|
|
#if (PAGE_SIZE < 8192)
|
|
rx_buffer->page_offset ^= truesize;
|
|
#else
|
|
rx_buffer->page_offset += truesize;
|
|
#endif
|
|
} else {
|
|
rx_buffer->pagecnt_bias++;
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
|
|
u32 qmask)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);
|
|
}
|
|
|
|
static struct sk_buff *ixgbevf_build_skb(struct ixgbevf_ring *rx_ring,
|
|
struct ixgbevf_rx_buffer *rx_buffer,
|
|
struct xdp_buff *xdp,
|
|
union ixgbe_adv_rx_desc *rx_desc)
|
|
{
|
|
unsigned int metasize = xdp->data - xdp->data_meta;
|
|
#if (PAGE_SIZE < 8192)
|
|
unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
|
|
#else
|
|
unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +
|
|
SKB_DATA_ALIGN(xdp->data_end -
|
|
xdp->data_hard_start);
|
|
#endif
|
|
struct sk_buff *skb;
|
|
|
|
/* Prefetch first cache line of first page. If xdp->data_meta
|
|
* is unused, this points to xdp->data, otherwise, we likely
|
|
* have a consumer accessing first few bytes of meta data,
|
|
* and then actual data.
|
|
*/
|
|
prefetch(xdp->data_meta);
|
|
#if L1_CACHE_BYTES < 128
|
|
prefetch(xdp->data_meta + L1_CACHE_BYTES);
|
|
#endif
|
|
|
|
/* build an skb around the page buffer */
|
|
skb = build_skb(xdp->data_hard_start, truesize);
|
|
if (unlikely(!skb))
|
|
return NULL;
|
|
|
|
/* update pointers within the skb to store the data */
|
|
skb_reserve(skb, xdp->data - xdp->data_hard_start);
|
|
__skb_put(skb, xdp->data_end - xdp->data);
|
|
if (metasize)
|
|
skb_metadata_set(skb, metasize);
|
|
|
|
/* update buffer offset */
|
|
#if (PAGE_SIZE < 8192)
|
|
rx_buffer->page_offset ^= truesize;
|
|
#else
|
|
rx_buffer->page_offset += truesize;
|
|
#endif
|
|
|
|
return skb;
|
|
}
|
|
|
|
#define IXGBEVF_XDP_PASS 0
|
|
#define IXGBEVF_XDP_CONSUMED 1
|
|
#define IXGBEVF_XDP_TX 2
|
|
|
|
static int ixgbevf_xmit_xdp_ring(struct ixgbevf_ring *ring,
|
|
struct xdp_buff *xdp)
|
|
{
|
|
struct ixgbevf_tx_buffer *tx_buffer;
|
|
union ixgbe_adv_tx_desc *tx_desc;
|
|
u32 len, cmd_type;
|
|
dma_addr_t dma;
|
|
u16 i;
|
|
|
|
len = xdp->data_end - xdp->data;
|
|
|
|
if (unlikely(!ixgbevf_desc_unused(ring)))
|
|
return IXGBEVF_XDP_CONSUMED;
|
|
|
|
dma = dma_map_single(ring->dev, xdp->data, len, DMA_TO_DEVICE);
|
|
if (dma_mapping_error(ring->dev, dma))
|
|
return IXGBEVF_XDP_CONSUMED;
|
|
|
|
/* record the location of the first descriptor for this packet */
|
|
i = ring->next_to_use;
|
|
tx_buffer = &ring->tx_buffer_info[i];
|
|
|
|
dma_unmap_len_set(tx_buffer, len, len);
|
|
dma_unmap_addr_set(tx_buffer, dma, dma);
|
|
tx_buffer->data = xdp->data;
|
|
tx_buffer->bytecount = len;
|
|
tx_buffer->gso_segs = 1;
|
|
tx_buffer->protocol = 0;
|
|
|
|
/* Populate minimal context descriptor that will provide for the
|
|
* fact that we are expected to process Ethernet frames.
|
|
*/
|
|
if (!test_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state)) {
|
|
struct ixgbe_adv_tx_context_desc *context_desc;
|
|
|
|
set_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state);
|
|
|
|
context_desc = IXGBEVF_TX_CTXTDESC(ring, 0);
|
|
context_desc->vlan_macip_lens =
|
|
cpu_to_le32(ETH_HLEN << IXGBE_ADVTXD_MACLEN_SHIFT);
|
|
context_desc->seqnum_seed = 0;
|
|
context_desc->type_tucmd_mlhl =
|
|
cpu_to_le32(IXGBE_TXD_CMD_DEXT |
|
|
IXGBE_ADVTXD_DTYP_CTXT);
|
|
context_desc->mss_l4len_idx = 0;
|
|
|
|
i = 1;
|
|
}
|
|
|
|
/* put descriptor type bits */
|
|
cmd_type = IXGBE_ADVTXD_DTYP_DATA |
|
|
IXGBE_ADVTXD_DCMD_DEXT |
|
|
IXGBE_ADVTXD_DCMD_IFCS;
|
|
cmd_type |= len | IXGBE_TXD_CMD;
|
|
|
|
tx_desc = IXGBEVF_TX_DESC(ring, i);
|
|
tx_desc->read.buffer_addr = cpu_to_le64(dma);
|
|
|
|
tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
|
|
tx_desc->read.olinfo_status =
|
|
cpu_to_le32((len << IXGBE_ADVTXD_PAYLEN_SHIFT) |
|
|
IXGBE_ADVTXD_CC);
|
|
|
|
/* Avoid any potential race with cleanup */
|
|
smp_wmb();
|
|
|
|
/* set next_to_watch value indicating a packet is present */
|
|
i++;
|
|
if (i == ring->count)
|
|
i = 0;
|
|
|
|
tx_buffer->next_to_watch = tx_desc;
|
|
ring->next_to_use = i;
|
|
|
|
return IXGBEVF_XDP_TX;
|
|
}
|
|
|
|
static struct sk_buff *ixgbevf_run_xdp(struct ixgbevf_adapter *adapter,
|
|
struct ixgbevf_ring *rx_ring,
|
|
struct xdp_buff *xdp)
|
|
{
|
|
int result = IXGBEVF_XDP_PASS;
|
|
struct ixgbevf_ring *xdp_ring;
|
|
struct bpf_prog *xdp_prog;
|
|
u32 act;
|
|
|
|
rcu_read_lock();
|
|
xdp_prog = READ_ONCE(rx_ring->xdp_prog);
|
|
|
|
if (!xdp_prog)
|
|
goto xdp_out;
|
|
|
|
act = bpf_prog_run_xdp(xdp_prog, xdp);
|
|
switch (act) {
|
|
case XDP_PASS:
|
|
break;
|
|
case XDP_TX:
|
|
xdp_ring = adapter->xdp_ring[rx_ring->queue_index];
|
|
result = ixgbevf_xmit_xdp_ring(xdp_ring, xdp);
|
|
break;
|
|
default:
|
|
bpf_warn_invalid_xdp_action(act);
|
|
/* fallthrough */
|
|
case XDP_ABORTED:
|
|
trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
|
|
/* fallthrough -- handle aborts by dropping packet */
|
|
case XDP_DROP:
|
|
result = IXGBEVF_XDP_CONSUMED;
|
|
break;
|
|
}
|
|
xdp_out:
|
|
rcu_read_unlock();
|
|
return ERR_PTR(-result);
|
|
}
|
|
|
|
static void ixgbevf_rx_buffer_flip(struct ixgbevf_ring *rx_ring,
|
|
struct ixgbevf_rx_buffer *rx_buffer,
|
|
unsigned int size)
|
|
{
|
|
#if (PAGE_SIZE < 8192)
|
|
unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
|
|
|
|
rx_buffer->page_offset ^= truesize;
|
|
#else
|
|
unsigned int truesize = ring_uses_build_skb(rx_ring) ?
|
|
SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) :
|
|
SKB_DATA_ALIGN(size);
|
|
|
|
rx_buffer->page_offset += truesize;
|
|
#endif
|
|
}
|
|
|
|
static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
|
|
struct ixgbevf_ring *rx_ring,
|
|
int budget)
|
|
{
|
|
unsigned int total_rx_bytes = 0, total_rx_packets = 0;
|
|
struct ixgbevf_adapter *adapter = q_vector->adapter;
|
|
u16 cleaned_count = ixgbevf_desc_unused(rx_ring);
|
|
struct sk_buff *skb = rx_ring->skb;
|
|
bool xdp_xmit = false;
|
|
struct xdp_buff xdp;
|
|
|
|
xdp.rxq = &rx_ring->xdp_rxq;
|
|
|
|
while (likely(total_rx_packets < budget)) {
|
|
struct ixgbevf_rx_buffer *rx_buffer;
|
|
union ixgbe_adv_rx_desc *rx_desc;
|
|
unsigned int size;
|
|
|
|
/* return some buffers to hardware, one at a time is too slow */
|
|
if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
|
|
ixgbevf_alloc_rx_buffers(rx_ring, cleaned_count);
|
|
cleaned_count = 0;
|
|
}
|
|
|
|
rx_desc = IXGBEVF_RX_DESC(rx_ring, rx_ring->next_to_clean);
|
|
size = le16_to_cpu(rx_desc->wb.upper.length);
|
|
if (!size)
|
|
break;
|
|
|
|
/* This memory barrier is needed to keep us from reading
|
|
* any other fields out of the rx_desc until we know the
|
|
* RXD_STAT_DD bit is set
|
|
*/
|
|
rmb();
|
|
|
|
rx_buffer = ixgbevf_get_rx_buffer(rx_ring, size);
|
|
|
|
/* retrieve a buffer from the ring */
|
|
if (!skb) {
|
|
xdp.data = page_address(rx_buffer->page) +
|
|
rx_buffer->page_offset;
|
|
xdp.data_meta = xdp.data;
|
|
xdp.data_hard_start = xdp.data -
|
|
ixgbevf_rx_offset(rx_ring);
|
|
xdp.data_end = xdp.data + size;
|
|
|
|
skb = ixgbevf_run_xdp(adapter, rx_ring, &xdp);
|
|
}
|
|
|
|
if (IS_ERR(skb)) {
|
|
if (PTR_ERR(skb) == -IXGBEVF_XDP_TX) {
|
|
xdp_xmit = true;
|
|
ixgbevf_rx_buffer_flip(rx_ring, rx_buffer,
|
|
size);
|
|
} else {
|
|
rx_buffer->pagecnt_bias++;
|
|
}
|
|
total_rx_packets++;
|
|
total_rx_bytes += size;
|
|
} else if (skb) {
|
|
ixgbevf_add_rx_frag(rx_ring, rx_buffer, skb, size);
|
|
} else if (ring_uses_build_skb(rx_ring)) {
|
|
skb = ixgbevf_build_skb(rx_ring, rx_buffer,
|
|
&xdp, rx_desc);
|
|
} else {
|
|
skb = ixgbevf_construct_skb(rx_ring, rx_buffer,
|
|
&xdp, rx_desc);
|
|
}
|
|
|
|
/* exit if we failed to retrieve a buffer */
|
|
if (!skb) {
|
|
rx_ring->rx_stats.alloc_rx_buff_failed++;
|
|
rx_buffer->pagecnt_bias++;
|
|
break;
|
|
}
|
|
|
|
ixgbevf_put_rx_buffer(rx_ring, rx_buffer, skb);
|
|
cleaned_count++;
|
|
|
|
/* fetch next buffer in frame if non-eop */
|
|
if (ixgbevf_is_non_eop(rx_ring, rx_desc))
|
|
continue;
|
|
|
|
/* verify the packet layout is correct */
|
|
if (ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) {
|
|
skb = NULL;
|
|
continue;
|
|
}
|
|
|
|
/* probably a little skewed due to removing CRC */
|
|
total_rx_bytes += skb->len;
|
|
|
|
/* Workaround hardware that can't do proper VEPA multicast
|
|
* source pruning.
|
|
*/
|
|
if ((skb->pkt_type == PACKET_BROADCAST ||
|
|
skb->pkt_type == PACKET_MULTICAST) &&
|
|
ether_addr_equal(rx_ring->netdev->dev_addr,
|
|
eth_hdr(skb)->h_source)) {
|
|
dev_kfree_skb_irq(skb);
|
|
continue;
|
|
}
|
|
|
|
/* populate checksum, VLAN, and protocol */
|
|
ixgbevf_process_skb_fields(rx_ring, rx_desc, skb);
|
|
|
|
ixgbevf_rx_skb(q_vector, skb);
|
|
|
|
/* reset skb pointer */
|
|
skb = NULL;
|
|
|
|
/* update budget accounting */
|
|
total_rx_packets++;
|
|
}
|
|
|
|
/* place incomplete frames back on ring for completion */
|
|
rx_ring->skb = skb;
|
|
|
|
if (xdp_xmit) {
|
|
struct ixgbevf_ring *xdp_ring =
|
|
adapter->xdp_ring[rx_ring->queue_index];
|
|
|
|
/* Force memory writes to complete before letting h/w
|
|
* know there are new descriptors to fetch.
|
|
*/
|
|
wmb();
|
|
ixgbevf_write_tail(xdp_ring, xdp_ring->next_to_use);
|
|
}
|
|
|
|
u64_stats_update_begin(&rx_ring->syncp);
|
|
rx_ring->stats.packets += total_rx_packets;
|
|
rx_ring->stats.bytes += total_rx_bytes;
|
|
u64_stats_update_end(&rx_ring->syncp);
|
|
q_vector->rx.total_packets += total_rx_packets;
|
|
q_vector->rx.total_bytes += total_rx_bytes;
|
|
|
|
return total_rx_packets;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_poll - NAPI polling calback
|
|
* @napi: napi struct with our devices info in it
|
|
* @budget: amount of work driver is allowed to do this pass, in packets
|
|
*
|
|
* This function will clean more than one or more rings associated with a
|
|
* q_vector.
|
|
**/
|
|
static int ixgbevf_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct ixgbevf_q_vector *q_vector =
|
|
container_of(napi, struct ixgbevf_q_vector, napi);
|
|
struct ixgbevf_adapter *adapter = q_vector->adapter;
|
|
struct ixgbevf_ring *ring;
|
|
int per_ring_budget, work_done = 0;
|
|
bool clean_complete = true;
|
|
|
|
ixgbevf_for_each_ring(ring, q_vector->tx) {
|
|
if (!ixgbevf_clean_tx_irq(q_vector, ring, budget))
|
|
clean_complete = false;
|
|
}
|
|
|
|
if (budget <= 0)
|
|
return budget;
|
|
|
|
/* attempt to distribute budget to each queue fairly, but don't allow
|
|
* the budget to go below 1 because we'll exit polling
|
|
*/
|
|
if (q_vector->rx.count > 1)
|
|
per_ring_budget = max(budget/q_vector->rx.count, 1);
|
|
else
|
|
per_ring_budget = budget;
|
|
|
|
ixgbevf_for_each_ring(ring, q_vector->rx) {
|
|
int cleaned = ixgbevf_clean_rx_irq(q_vector, ring,
|
|
per_ring_budget);
|
|
work_done += cleaned;
|
|
if (cleaned >= per_ring_budget)
|
|
clean_complete = false;
|
|
}
|
|
|
|
/* If all work not completed, return budget and keep polling */
|
|
if (!clean_complete)
|
|
return budget;
|
|
/* all work done, exit the polling mode */
|
|
napi_complete_done(napi, work_done);
|
|
if (adapter->rx_itr_setting == 1)
|
|
ixgbevf_set_itr(q_vector);
|
|
if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
|
|
!test_bit(__IXGBEVF_REMOVING, &adapter->state))
|
|
ixgbevf_irq_enable_queues(adapter,
|
|
BIT(q_vector->v_idx));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_write_eitr - write VTEITR register in hardware specific way
|
|
* @q_vector: structure containing interrupt and ring information
|
|
**/
|
|
void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
|
|
{
|
|
struct ixgbevf_adapter *adapter = q_vector->adapter;
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
int v_idx = q_vector->v_idx;
|
|
u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
|
|
|
|
/* set the WDIS bit to not clear the timer bits and cause an
|
|
* immediate assertion of the interrupt
|
|
*/
|
|
itr_reg |= IXGBE_EITR_CNT_WDIS;
|
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_configure_msix - Configure MSI-X hardware
|
|
* @adapter: board private structure
|
|
*
|
|
* ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
|
|
* interrupts.
|
|
**/
|
|
static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct ixgbevf_q_vector *q_vector;
|
|
int q_vectors, v_idx;
|
|
|
|
q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
|
|
adapter->eims_enable_mask = 0;
|
|
|
|
/* Populate the IVAR table and set the ITR values to the
|
|
* corresponding register.
|
|
*/
|
|
for (v_idx = 0; v_idx < q_vectors; v_idx++) {
|
|
struct ixgbevf_ring *ring;
|
|
|
|
q_vector = adapter->q_vector[v_idx];
|
|
|
|
ixgbevf_for_each_ring(ring, q_vector->rx)
|
|
ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
|
|
|
|
ixgbevf_for_each_ring(ring, q_vector->tx)
|
|
ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
|
|
|
|
if (q_vector->tx.ring && !q_vector->rx.ring) {
|
|
/* Tx only vector */
|
|
if (adapter->tx_itr_setting == 1)
|
|
q_vector->itr = IXGBE_12K_ITR;
|
|
else
|
|
q_vector->itr = adapter->tx_itr_setting;
|
|
} else {
|
|
/* Rx or Rx/Tx vector */
|
|
if (adapter->rx_itr_setting == 1)
|
|
q_vector->itr = IXGBE_20K_ITR;
|
|
else
|
|
q_vector->itr = adapter->rx_itr_setting;
|
|
}
|
|
|
|
/* add q_vector eims value to global eims_enable_mask */
|
|
adapter->eims_enable_mask |= BIT(v_idx);
|
|
|
|
ixgbevf_write_eitr(q_vector);
|
|
}
|
|
|
|
ixgbevf_set_ivar(adapter, -1, 1, v_idx);
|
|
/* setup eims_other and add value to global eims_enable_mask */
|
|
adapter->eims_other = BIT(v_idx);
|
|
adapter->eims_enable_mask |= adapter->eims_other;
|
|
}
|
|
|
|
enum latency_range {
|
|
lowest_latency = 0,
|
|
low_latency = 1,
|
|
bulk_latency = 2,
|
|
latency_invalid = 255
|
|
};
|
|
|
|
/**
|
|
* ixgbevf_update_itr - update the dynamic ITR value based on statistics
|
|
* @q_vector: structure containing interrupt and ring information
|
|
* @ring_container: structure containing ring performance data
|
|
*
|
|
* 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.
|
|
**/
|
|
static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
|
|
struct ixgbevf_ring_container *ring_container)
|
|
{
|
|
int bytes = ring_container->total_bytes;
|
|
int packets = ring_container->total_packets;
|
|
u32 timepassed_us;
|
|
u64 bytes_perint;
|
|
u8 itr_setting = ring_container->itr;
|
|
|
|
if (packets == 0)
|
|
return;
|
|
|
|
/* simple throttle rate management
|
|
* 0-20MB/s lowest (100000 ints/s)
|
|
* 20-100MB/s low (20000 ints/s)
|
|
* 100-1249MB/s bulk (12000 ints/s)
|
|
*/
|
|
/* what was last interrupt timeslice? */
|
|
timepassed_us = q_vector->itr >> 2;
|
|
bytes_perint = bytes / timepassed_us; /* bytes/usec */
|
|
|
|
switch (itr_setting) {
|
|
case lowest_latency:
|
|
if (bytes_perint > 10)
|
|
itr_setting = low_latency;
|
|
break;
|
|
case low_latency:
|
|
if (bytes_perint > 20)
|
|
itr_setting = bulk_latency;
|
|
else if (bytes_perint <= 10)
|
|
itr_setting = lowest_latency;
|
|
break;
|
|
case bulk_latency:
|
|
if (bytes_perint <= 20)
|
|
itr_setting = low_latency;
|
|
break;
|
|
}
|
|
|
|
/* clear work counters since we have the values we need */
|
|
ring_container->total_bytes = 0;
|
|
ring_container->total_packets = 0;
|
|
|
|
/* write updated itr to ring container */
|
|
ring_container->itr = itr_setting;
|
|
}
|
|
|
|
static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
|
|
{
|
|
u32 new_itr = q_vector->itr;
|
|
u8 current_itr;
|
|
|
|
ixgbevf_update_itr(q_vector, &q_vector->tx);
|
|
ixgbevf_update_itr(q_vector, &q_vector->rx);
|
|
|
|
current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
|
|
|
|
switch (current_itr) {
|
|
/* counts and packets in update_itr are dependent on these numbers */
|
|
case lowest_latency:
|
|
new_itr = IXGBE_100K_ITR;
|
|
break;
|
|
case low_latency:
|
|
new_itr = IXGBE_20K_ITR;
|
|
break;
|
|
case bulk_latency:
|
|
new_itr = IXGBE_12K_ITR;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (new_itr != q_vector->itr) {
|
|
/* do an exponential smoothing */
|
|
new_itr = (10 * new_itr * q_vector->itr) /
|
|
((9 * new_itr) + q_vector->itr);
|
|
|
|
/* save the algorithm value here */
|
|
q_vector->itr = new_itr;
|
|
|
|
ixgbevf_write_eitr(q_vector);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t ixgbevf_msix_other(int irq, void *data)
|
|
{
|
|
struct ixgbevf_adapter *adapter = data;
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
|
|
hw->mac.get_link_status = 1;
|
|
|
|
ixgbevf_service_event_schedule(adapter);
|
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
|
|
* @irq: unused
|
|
* @data: pointer to our q_vector struct for this interrupt vector
|
|
**/
|
|
static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
|
|
{
|
|
struct ixgbevf_q_vector *q_vector = data;
|
|
|
|
/* EIAM disabled interrupts (on this vector) for us */
|
|
if (q_vector->rx.ring || q_vector->tx.ring)
|
|
napi_schedule_irqoff(&q_vector->napi);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
|
|
* @adapter: board private structure
|
|
*
|
|
* ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
|
|
* interrupts from the kernel.
|
|
**/
|
|
static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct net_device *netdev = adapter->netdev;
|
|
int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
|
|
unsigned int ri = 0, ti = 0;
|
|
int vector, err;
|
|
|
|
for (vector = 0; vector < q_vectors; vector++) {
|
|
struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];
|
|
struct msix_entry *entry = &adapter->msix_entries[vector];
|
|
|
|
if (q_vector->tx.ring && q_vector->rx.ring) {
|
|
snprintf(q_vector->name, sizeof(q_vector->name),
|
|
"%s-TxRx-%u", netdev->name, ri++);
|
|
ti++;
|
|
} else if (q_vector->rx.ring) {
|
|
snprintf(q_vector->name, sizeof(q_vector->name),
|
|
"%s-rx-%u", netdev->name, ri++);
|
|
} else if (q_vector->tx.ring) {
|
|
snprintf(q_vector->name, sizeof(q_vector->name),
|
|
"%s-tx-%u", netdev->name, ti++);
|
|
} else {
|
|
/* skip this unused q_vector */
|
|
continue;
|
|
}
|
|
err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
|
|
q_vector->name, q_vector);
|
|
if (err) {
|
|
hw_dbg(&adapter->hw,
|
|
"request_irq failed for MSIX interrupt Error: %d\n",
|
|
err);
|
|
goto free_queue_irqs;
|
|
}
|
|
}
|
|
|
|
err = request_irq(adapter->msix_entries[vector].vector,
|
|
&ixgbevf_msix_other, 0, netdev->name, adapter);
|
|
if (err) {
|
|
hw_dbg(&adapter->hw, "request_irq for msix_other failed: %d\n",
|
|
err);
|
|
goto free_queue_irqs;
|
|
}
|
|
|
|
return 0;
|
|
|
|
free_queue_irqs:
|
|
while (vector) {
|
|
vector--;
|
|
free_irq(adapter->msix_entries[vector].vector,
|
|
adapter->q_vector[vector]);
|
|
}
|
|
/* This failure is non-recoverable - it indicates the system is
|
|
* out of MSIX vector resources and the VF driver cannot run
|
|
* without them. Set the number of msix vectors to zero
|
|
* indicating that not enough can be allocated. The error
|
|
* will be returned to the user indicating device open failed.
|
|
* Any further attempts to force the driver to open will also
|
|
* fail. The only way to recover is to unload the driver and
|
|
* reload it again. If the system has recovered some MSIX
|
|
* vectors then it may succeed.
|
|
*/
|
|
adapter->num_msix_vectors = 0;
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_request_irq - initialize interrupts
|
|
* @adapter: board private structure
|
|
*
|
|
* Attempts to configure interrupts using the best available
|
|
* capabilities of the hardware and kernel.
|
|
**/
|
|
static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
|
|
{
|
|
int err = ixgbevf_request_msix_irqs(adapter);
|
|
|
|
if (err)
|
|
hw_dbg(&adapter->hw, "request_irq failed, Error %d\n", err);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
|
|
{
|
|
int i, q_vectors;
|
|
|
|
if (!adapter->msix_entries)
|
|
return;
|
|
|
|
q_vectors = adapter->num_msix_vectors;
|
|
i = q_vectors - 1;
|
|
|
|
free_irq(adapter->msix_entries[i].vector, adapter);
|
|
i--;
|
|
|
|
for (; i >= 0; i--) {
|
|
/* free only the irqs that were actually requested */
|
|
if (!adapter->q_vector[i]->rx.ring &&
|
|
!adapter->q_vector[i]->tx.ring)
|
|
continue;
|
|
|
|
free_irq(adapter->msix_entries[i].vector,
|
|
adapter->q_vector[i]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_irq_disable - Mask off interrupt generation on the NIC
|
|
* @adapter: board private structure
|
|
**/
|
|
static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
int i;
|
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
|
|
IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
|
|
IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
|
|
|
|
IXGBE_WRITE_FLUSH(hw);
|
|
|
|
for (i = 0; i < adapter->num_msix_vectors; i++)
|
|
synchronize_irq(adapter->msix_entries[i].vector);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_irq_enable - Enable default interrupt generation settings
|
|
* @adapter: board private structure
|
|
**/
|
|
static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);
|
|
IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);
|
|
IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset
|
|
* @adapter: board private structure
|
|
* @ring: structure containing ring specific data
|
|
*
|
|
* Configure the Tx descriptor ring after a reset.
|
|
**/
|
|
static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter *adapter,
|
|
struct ixgbevf_ring *ring)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
u64 tdba = ring->dma;
|
|
int wait_loop = 10;
|
|
u32 txdctl = IXGBE_TXDCTL_ENABLE;
|
|
u8 reg_idx = ring->reg_idx;
|
|
|
|
/* disable queue to avoid issues while updating state */
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
|
|
IXGBE_WRITE_FLUSH(hw);
|
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(reg_idx), tdba >> 32);
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(reg_idx),
|
|
ring->count * sizeof(union ixgbe_adv_tx_desc));
|
|
|
|
/* disable head writeback */
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAH(reg_idx), 0);
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAL(reg_idx), 0);
|
|
|
|
/* enable relaxed ordering */
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(reg_idx),
|
|
(IXGBE_DCA_TXCTRL_DESC_RRO_EN |
|
|
IXGBE_DCA_TXCTRL_DATA_RRO_EN));
|
|
|
|
/* reset head and tail pointers */
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFTDH(reg_idx), 0);
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFTDT(reg_idx), 0);
|
|
ring->tail = adapter->io_addr + IXGBE_VFTDT(reg_idx);
|
|
|
|
/* reset ntu and ntc to place SW in sync with hardwdare */
|
|
ring->next_to_clean = 0;
|
|
ring->next_to_use = 0;
|
|
|
|
/* In order to avoid issues WTHRESH + PTHRESH should always be equal
|
|
* to or less than the number of on chip descriptors, which is
|
|
* currently 40.
|
|
*/
|
|
txdctl |= (8 << 16); /* WTHRESH = 8 */
|
|
|
|
/* Setting PTHRESH to 32 both improves performance */
|
|
txdctl |= (1u << 8) | /* HTHRESH = 1 */
|
|
32; /* PTHRESH = 32 */
|
|
|
|
/* reinitialize tx_buffer_info */
|
|
memset(ring->tx_buffer_info, 0,
|
|
sizeof(struct ixgbevf_tx_buffer) * ring->count);
|
|
|
|
clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &ring->state);
|
|
clear_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state);
|
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), txdctl);
|
|
|
|
/* poll to verify queue is enabled */
|
|
do {
|
|
usleep_range(1000, 2000);
|
|
txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(reg_idx));
|
|
} while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
|
|
if (!wait_loop)
|
|
hw_dbg(hw, "Could not enable Tx Queue %d\n", reg_idx);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
|
|
* @adapter: board private structure
|
|
*
|
|
* Configure the Tx unit of the MAC after a reset.
|
|
**/
|
|
static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
|
|
{
|
|
u32 i;
|
|
|
|
/* Setup the HW Tx Head and Tail descriptor pointers */
|
|
for (i = 0; i < adapter->num_tx_queues; i++)
|
|
ixgbevf_configure_tx_ring(adapter, adapter->tx_ring[i]);
|
|
for (i = 0; i < adapter->num_xdp_queues; i++)
|
|
ixgbevf_configure_tx_ring(adapter, adapter->xdp_ring[i]);
|
|
}
|
|
|
|
#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
|
|
|
|
static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter,
|
|
struct ixgbevf_ring *ring, int index)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
u32 srrctl;
|
|
|
|
srrctl = IXGBE_SRRCTL_DROP_EN;
|
|
|
|
srrctl |= IXGBEVF_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
|
|
if (ring_uses_large_buffer(ring))
|
|
srrctl |= IXGBEVF_RXBUFFER_3072 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
|
|
else
|
|
srrctl |= IXGBEVF_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
|
|
srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
|
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
|
|
}
|
|
|
|
static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
|
|
/* PSRTYPE must be initialized in 82599 */
|
|
u32 psrtype = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR |
|
|
IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR |
|
|
IXGBE_PSRTYPE_L2HDR;
|
|
|
|
if (adapter->num_rx_queues > 1)
|
|
psrtype |= BIT(29);
|
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
|
|
}
|
|
|
|
#define IXGBEVF_MAX_RX_DESC_POLL 10
|
|
static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter,
|
|
struct ixgbevf_ring *ring)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
|
|
u32 rxdctl;
|
|
u8 reg_idx = ring->reg_idx;
|
|
|
|
if (IXGBE_REMOVED(hw->hw_addr))
|
|
return;
|
|
rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
|
|
rxdctl &= ~IXGBE_RXDCTL_ENABLE;
|
|
|
|
/* write value back with RXDCTL.ENABLE bit cleared */
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
|
|
|
|
/* the hardware may take up to 100us to really disable the Rx queue */
|
|
do {
|
|
udelay(10);
|
|
rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
|
|
} while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
|
|
|
|
if (!wait_loop)
|
|
pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n",
|
|
reg_idx);
|
|
}
|
|
|
|
static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
|
|
struct ixgbevf_ring *ring)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
|
|
u32 rxdctl;
|
|
u8 reg_idx = ring->reg_idx;
|
|
|
|
if (IXGBE_REMOVED(hw->hw_addr))
|
|
return;
|
|
do {
|
|
usleep_range(1000, 2000);
|
|
rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
|
|
} while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
|
|
|
|
if (!wait_loop)
|
|
pr_err("RXDCTL.ENABLE queue %d not set while polling\n",
|
|
reg_idx);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_init_rss_key - Initialize adapter RSS key
|
|
* @adapter: device handle
|
|
*
|
|
* Allocates and initializes the RSS key if it is not allocated.
|
|
**/
|
|
static inline int ixgbevf_init_rss_key(struct ixgbevf_adapter *adapter)
|
|
{
|
|
u32 *rss_key;
|
|
|
|
if (!adapter->rss_key) {
|
|
rss_key = kzalloc(IXGBEVF_RSS_HASH_KEY_SIZE, GFP_KERNEL);
|
|
if (unlikely(!rss_key))
|
|
return -ENOMEM;
|
|
|
|
netdev_rss_key_fill(rss_key, IXGBEVF_RSS_HASH_KEY_SIZE);
|
|
adapter->rss_key = rss_key;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
u32 vfmrqc = 0, vfreta = 0;
|
|
u16 rss_i = adapter->num_rx_queues;
|
|
u8 i, j;
|
|
|
|
/* Fill out hash function seeds */
|
|
for (i = 0; i < IXGBEVF_VFRSSRK_REGS; i++)
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFRSSRK(i), *(adapter->rss_key + i));
|
|
|
|
for (i = 0, j = 0; i < IXGBEVF_X550_VFRETA_SIZE; i++, j++) {
|
|
if (j == rss_i)
|
|
j = 0;
|
|
|
|
adapter->rss_indir_tbl[i] = j;
|
|
|
|
vfreta |= j << (i & 0x3) * 8;
|
|
if ((i & 3) == 3) {
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFRETA(i >> 2), vfreta);
|
|
vfreta = 0;
|
|
}
|
|
}
|
|
|
|
/* Perform hash on these packet types */
|
|
vfmrqc |= IXGBE_VFMRQC_RSS_FIELD_IPV4 |
|
|
IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP |
|
|
IXGBE_VFMRQC_RSS_FIELD_IPV6 |
|
|
IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP;
|
|
|
|
vfmrqc |= IXGBE_VFMRQC_RSSEN;
|
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFMRQC, vfmrqc);
|
|
}
|
|
|
|
static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter,
|
|
struct ixgbevf_ring *ring)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
union ixgbe_adv_rx_desc *rx_desc;
|
|
u64 rdba = ring->dma;
|
|
u32 rxdctl;
|
|
u8 reg_idx = ring->reg_idx;
|
|
|
|
/* disable queue to avoid issues while updating state */
|
|
rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
|
|
ixgbevf_disable_rx_queue(adapter, ring);
|
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(reg_idx), rdba >> 32);
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(reg_idx),
|
|
ring->count * sizeof(union ixgbe_adv_rx_desc));
|
|
|
|
#ifndef CONFIG_SPARC
|
|
/* enable relaxed ordering */
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
|
|
IXGBE_DCA_RXCTRL_DESC_RRO_EN);
|
|
#else
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
|
|
IXGBE_DCA_RXCTRL_DESC_RRO_EN |
|
|
IXGBE_DCA_RXCTRL_DATA_WRO_EN);
|
|
#endif
|
|
|
|
/* reset head and tail pointers */
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFRDH(reg_idx), 0);
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFRDT(reg_idx), 0);
|
|
ring->tail = adapter->io_addr + IXGBE_VFRDT(reg_idx);
|
|
|
|
/* initialize rx_buffer_info */
|
|
memset(ring->rx_buffer_info, 0,
|
|
sizeof(struct ixgbevf_rx_buffer) * ring->count);
|
|
|
|
/* initialize Rx descriptor 0 */
|
|
rx_desc = IXGBEVF_RX_DESC(ring, 0);
|
|
rx_desc->wb.upper.length = 0;
|
|
|
|
/* reset ntu and ntc to place SW in sync with hardwdare */
|
|
ring->next_to_clean = 0;
|
|
ring->next_to_use = 0;
|
|
ring->next_to_alloc = 0;
|
|
|
|
ixgbevf_configure_srrctl(adapter, ring, reg_idx);
|
|
|
|
/* RXDCTL.RLPML does not work on 82599 */
|
|
if (adapter->hw.mac.type != ixgbe_mac_82599_vf) {
|
|
rxdctl &= ~(IXGBE_RXDCTL_RLPMLMASK |
|
|
IXGBE_RXDCTL_RLPML_EN);
|
|
|
|
#if (PAGE_SIZE < 8192)
|
|
/* Limit the maximum frame size so we don't overrun the skb */
|
|
if (ring_uses_build_skb(ring) &&
|
|
!ring_uses_large_buffer(ring))
|
|
rxdctl |= IXGBEVF_MAX_FRAME_BUILD_SKB |
|
|
IXGBE_RXDCTL_RLPML_EN;
|
|
#endif
|
|
}
|
|
|
|
rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
|
|
|
|
ixgbevf_rx_desc_queue_enable(adapter, ring);
|
|
ixgbevf_alloc_rx_buffers(ring, ixgbevf_desc_unused(ring));
|
|
}
|
|
|
|
static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter,
|
|
struct ixgbevf_ring *rx_ring)
|
|
{
|
|
struct net_device *netdev = adapter->netdev;
|
|
unsigned int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
|
|
|
|
/* set build_skb and buffer size flags */
|
|
clear_ring_build_skb_enabled(rx_ring);
|
|
clear_ring_uses_large_buffer(rx_ring);
|
|
|
|
if (adapter->flags & IXGBEVF_FLAGS_LEGACY_RX)
|
|
return;
|
|
|
|
set_ring_build_skb_enabled(rx_ring);
|
|
|
|
if (PAGE_SIZE < 8192) {
|
|
if (max_frame <= IXGBEVF_MAX_FRAME_BUILD_SKB)
|
|
return;
|
|
|
|
set_ring_uses_large_buffer(rx_ring);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
|
|
* @adapter: board private structure
|
|
*
|
|
* Configure the Rx unit of the MAC after a reset.
|
|
**/
|
|
static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
struct net_device *netdev = adapter->netdev;
|
|
int i, ret;
|
|
|
|
ixgbevf_setup_psrtype(adapter);
|
|
if (hw->mac.type >= ixgbe_mac_X550_vf)
|
|
ixgbevf_setup_vfmrqc(adapter);
|
|
|
|
spin_lock_bh(&adapter->mbx_lock);
|
|
/* notify the PF of our intent to use this size of frame */
|
|
ret = hw->mac.ops.set_rlpml(hw, netdev->mtu + ETH_HLEN + ETH_FCS_LEN);
|
|
spin_unlock_bh(&adapter->mbx_lock);
|
|
if (ret)
|
|
dev_err(&adapter->pdev->dev,
|
|
"Failed to set MTU at %d\n", netdev->mtu);
|
|
|
|
/* Setup the HW Rx Head and Tail Descriptor Pointers and
|
|
* the Base and Length of the Rx Descriptor Ring
|
|
*/
|
|
for (i = 0; i < adapter->num_rx_queues; i++) {
|
|
struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];
|
|
|
|
ixgbevf_set_rx_buffer_len(adapter, rx_ring);
|
|
ixgbevf_configure_rx_ring(adapter, rx_ring);
|
|
}
|
|
}
|
|
|
|
static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,
|
|
__be16 proto, u16 vid)
|
|
{
|
|
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
int err;
|
|
|
|
spin_lock_bh(&adapter->mbx_lock);
|
|
|
|
/* add VID to filter table */
|
|
err = hw->mac.ops.set_vfta(hw, vid, 0, true);
|
|
|
|
spin_unlock_bh(&adapter->mbx_lock);
|
|
|
|
/* translate error return types so error makes sense */
|
|
if (err == IXGBE_ERR_MBX)
|
|
return -EIO;
|
|
|
|
if (err == IXGBE_ERR_INVALID_ARGUMENT)
|
|
return -EACCES;
|
|
|
|
set_bit(vid, adapter->active_vlans);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,
|
|
__be16 proto, u16 vid)
|
|
{
|
|
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
int err;
|
|
|
|
spin_lock_bh(&adapter->mbx_lock);
|
|
|
|
/* remove VID from filter table */
|
|
err = hw->mac.ops.set_vfta(hw, vid, 0, false);
|
|
|
|
spin_unlock_bh(&adapter->mbx_lock);
|
|
|
|
clear_bit(vid, adapter->active_vlans);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
|
|
{
|
|
u16 vid;
|
|
|
|
for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
|
|
ixgbevf_vlan_rx_add_vid(adapter->netdev,
|
|
htons(ETH_P_8021Q), vid);
|
|
}
|
|
|
|
static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
|
|
{
|
|
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
int count = 0;
|
|
|
|
if (!netdev_uc_empty(netdev)) {
|
|
struct netdev_hw_addr *ha;
|
|
|
|
netdev_for_each_uc_addr(ha, netdev) {
|
|
hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
|
|
udelay(200);
|
|
}
|
|
} else {
|
|
/* If the list is empty then send message to PF driver to
|
|
* clear all MAC VLANs on this VF.
|
|
*/
|
|
hw->mac.ops.set_uc_addr(hw, 0, NULL);
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_set_rx_mode - Multicast and unicast set
|
|
* @netdev: network interface device structure
|
|
*
|
|
* The set_rx_method entry point is called whenever the multicast address
|
|
* list, unicast address list or the network interface flags are updated.
|
|
* This routine is responsible for configuring the hardware for proper
|
|
* multicast mode and configuring requested unicast filters.
|
|
**/
|
|
static void ixgbevf_set_rx_mode(struct net_device *netdev)
|
|
{
|
|
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
unsigned int flags = netdev->flags;
|
|
int xcast_mode;
|
|
|
|
/* request the most inclusive mode we need */
|
|
if (flags & IFF_PROMISC)
|
|
xcast_mode = IXGBEVF_XCAST_MODE_PROMISC;
|
|
else if (flags & IFF_ALLMULTI)
|
|
xcast_mode = IXGBEVF_XCAST_MODE_ALLMULTI;
|
|
else if (flags & (IFF_BROADCAST | IFF_MULTICAST))
|
|
xcast_mode = IXGBEVF_XCAST_MODE_MULTI;
|
|
else
|
|
xcast_mode = IXGBEVF_XCAST_MODE_NONE;
|
|
|
|
spin_lock_bh(&adapter->mbx_lock);
|
|
|
|
hw->mac.ops.update_xcast_mode(hw, xcast_mode);
|
|
|
|
/* reprogram multicast list */
|
|
hw->mac.ops.update_mc_addr_list(hw, netdev);
|
|
|
|
ixgbevf_write_uc_addr_list(netdev);
|
|
|
|
spin_unlock_bh(&adapter->mbx_lock);
|
|
}
|
|
|
|
static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
|
|
{
|
|
int q_idx;
|
|
struct ixgbevf_q_vector *q_vector;
|
|
int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
|
|
|
|
for (q_idx = 0; q_idx < q_vectors; q_idx++) {
|
|
q_vector = adapter->q_vector[q_idx];
|
|
napi_enable(&q_vector->napi);
|
|
}
|
|
}
|
|
|
|
static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
|
|
{
|
|
int q_idx;
|
|
struct ixgbevf_q_vector *q_vector;
|
|
int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
|
|
|
|
for (q_idx = 0; q_idx < q_vectors; q_idx++) {
|
|
q_vector = adapter->q_vector[q_idx];
|
|
napi_disable(&q_vector->napi);
|
|
}
|
|
}
|
|
|
|
static int ixgbevf_configure_dcb(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
unsigned int def_q = 0;
|
|
unsigned int num_tcs = 0;
|
|
unsigned int num_rx_queues = adapter->num_rx_queues;
|
|
unsigned int num_tx_queues = adapter->num_tx_queues;
|
|
int err;
|
|
|
|
spin_lock_bh(&adapter->mbx_lock);
|
|
|
|
/* fetch queue configuration from the PF */
|
|
err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
|
|
|
|
spin_unlock_bh(&adapter->mbx_lock);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
if (num_tcs > 1) {
|
|
/* we need only one Tx queue */
|
|
num_tx_queues = 1;
|
|
|
|
/* update default Tx ring register index */
|
|
adapter->tx_ring[0]->reg_idx = def_q;
|
|
|
|
/* we need as many queues as traffic classes */
|
|
num_rx_queues = num_tcs;
|
|
}
|
|
|
|
/* if we have a bad config abort request queue reset */
|
|
if ((adapter->num_rx_queues != num_rx_queues) ||
|
|
(adapter->num_tx_queues != num_tx_queues)) {
|
|
/* force mailbox timeout to prevent further messages */
|
|
hw->mbx.timeout = 0;
|
|
|
|
/* wait for watchdog to come around and bail us out */
|
|
set_bit(__IXGBEVF_QUEUE_RESET_REQUESTED, &adapter->state);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
|
|
{
|
|
ixgbevf_configure_dcb(adapter);
|
|
|
|
ixgbevf_set_rx_mode(adapter->netdev);
|
|
|
|
ixgbevf_restore_vlan(adapter);
|
|
|
|
ixgbevf_configure_tx(adapter);
|
|
ixgbevf_configure_rx(adapter);
|
|
}
|
|
|
|
static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
|
|
{
|
|
/* Only save pre-reset stats if there are some */
|
|
if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
|
|
adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
|
|
adapter->stats.base_vfgprc;
|
|
adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
|
|
adapter->stats.base_vfgptc;
|
|
adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
|
|
adapter->stats.base_vfgorc;
|
|
adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
|
|
adapter->stats.base_vfgotc;
|
|
adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
|
|
adapter->stats.base_vfmprc;
|
|
}
|
|
}
|
|
|
|
static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
|
|
adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
|
|
adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
|
|
adapter->stats.last_vfgorc |=
|
|
(((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
|
|
adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
|
|
adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
|
|
adapter->stats.last_vfgotc |=
|
|
(((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
|
|
adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
|
|
|
|
adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
|
|
adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
|
|
adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
|
|
adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
|
|
adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
|
|
}
|
|
|
|
static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
int api[] = { ixgbe_mbox_api_13,
|
|
ixgbe_mbox_api_12,
|
|
ixgbe_mbox_api_11,
|
|
ixgbe_mbox_api_10,
|
|
ixgbe_mbox_api_unknown };
|
|
int err, idx = 0;
|
|
|
|
spin_lock_bh(&adapter->mbx_lock);
|
|
|
|
while (api[idx] != ixgbe_mbox_api_unknown) {
|
|
err = hw->mac.ops.negotiate_api_version(hw, api[idx]);
|
|
if (!err)
|
|
break;
|
|
idx++;
|
|
}
|
|
|
|
spin_unlock_bh(&adapter->mbx_lock);
|
|
}
|
|
|
|
static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct net_device *netdev = adapter->netdev;
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
|
|
ixgbevf_configure_msix(adapter);
|
|
|
|
spin_lock_bh(&adapter->mbx_lock);
|
|
|
|
if (is_valid_ether_addr(hw->mac.addr))
|
|
hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
|
|
else
|
|
hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
|
|
|
|
spin_unlock_bh(&adapter->mbx_lock);
|
|
|
|
smp_mb__before_atomic();
|
|
clear_bit(__IXGBEVF_DOWN, &adapter->state);
|
|
ixgbevf_napi_enable_all(adapter);
|
|
|
|
/* clear any pending interrupts, may auto mask */
|
|
IXGBE_READ_REG(hw, IXGBE_VTEICR);
|
|
ixgbevf_irq_enable(adapter);
|
|
|
|
/* enable transmits */
|
|
netif_tx_start_all_queues(netdev);
|
|
|
|
ixgbevf_save_reset_stats(adapter);
|
|
ixgbevf_init_last_counter_stats(adapter);
|
|
|
|
hw->mac.get_link_status = 1;
|
|
mod_timer(&adapter->service_timer, jiffies);
|
|
}
|
|
|
|
void ixgbevf_up(struct ixgbevf_adapter *adapter)
|
|
{
|
|
ixgbevf_configure(adapter);
|
|
|
|
ixgbevf_up_complete(adapter);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
|
|
* @rx_ring: ring to free buffers from
|
|
**/
|
|
static void ixgbevf_clean_rx_ring(struct ixgbevf_ring *rx_ring)
|
|
{
|
|
u16 i = rx_ring->next_to_clean;
|
|
|
|
/* Free Rx ring sk_buff */
|
|
if (rx_ring->skb) {
|
|
dev_kfree_skb(rx_ring->skb);
|
|
rx_ring->skb = NULL;
|
|
}
|
|
|
|
/* Free all the Rx ring pages */
|
|
while (i != rx_ring->next_to_alloc) {
|
|
struct ixgbevf_rx_buffer *rx_buffer;
|
|
|
|
rx_buffer = &rx_ring->rx_buffer_info[i];
|
|
|
|
/* Invalidate cache lines that may have been written to by
|
|
* device so that we avoid corrupting memory.
|
|
*/
|
|
dma_sync_single_range_for_cpu(rx_ring->dev,
|
|
rx_buffer->dma,
|
|
rx_buffer->page_offset,
|
|
ixgbevf_rx_bufsz(rx_ring),
|
|
DMA_FROM_DEVICE);
|
|
|
|
/* free resources associated with mapping */
|
|
dma_unmap_page_attrs(rx_ring->dev,
|
|
rx_buffer->dma,
|
|
ixgbevf_rx_pg_size(rx_ring),
|
|
DMA_FROM_DEVICE,
|
|
IXGBEVF_RX_DMA_ATTR);
|
|
|
|
__page_frag_cache_drain(rx_buffer->page,
|
|
rx_buffer->pagecnt_bias);
|
|
|
|
i++;
|
|
if (i == rx_ring->count)
|
|
i = 0;
|
|
}
|
|
|
|
rx_ring->next_to_alloc = 0;
|
|
rx_ring->next_to_clean = 0;
|
|
rx_ring->next_to_use = 0;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_clean_tx_ring - Free Tx Buffers
|
|
* @tx_ring: ring to be cleaned
|
|
**/
|
|
static void ixgbevf_clean_tx_ring(struct ixgbevf_ring *tx_ring)
|
|
{
|
|
u16 i = tx_ring->next_to_clean;
|
|
struct ixgbevf_tx_buffer *tx_buffer = &tx_ring->tx_buffer_info[i];
|
|
|
|
while (i != tx_ring->next_to_use) {
|
|
union ixgbe_adv_tx_desc *eop_desc, *tx_desc;
|
|
|
|
/* Free all the Tx ring sk_buffs */
|
|
if (ring_is_xdp(tx_ring))
|
|
page_frag_free(tx_buffer->data);
|
|
else
|
|
dev_kfree_skb_any(tx_buffer->skb);
|
|
|
|
/* unmap skb header data */
|
|
dma_unmap_single(tx_ring->dev,
|
|
dma_unmap_addr(tx_buffer, dma),
|
|
dma_unmap_len(tx_buffer, len),
|
|
DMA_TO_DEVICE);
|
|
|
|
/* check for eop_desc to determine the end of the packet */
|
|
eop_desc = tx_buffer->next_to_watch;
|
|
tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
|
|
|
|
/* unmap remaining buffers */
|
|
while (tx_desc != eop_desc) {
|
|
tx_buffer++;
|
|
tx_desc++;
|
|
i++;
|
|
if (unlikely(i == tx_ring->count)) {
|
|
i = 0;
|
|
tx_buffer = tx_ring->tx_buffer_info;
|
|
tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
|
|
}
|
|
|
|
/* unmap any remaining paged data */
|
|
if (dma_unmap_len(tx_buffer, len))
|
|
dma_unmap_page(tx_ring->dev,
|
|
dma_unmap_addr(tx_buffer, dma),
|
|
dma_unmap_len(tx_buffer, len),
|
|
DMA_TO_DEVICE);
|
|
}
|
|
|
|
/* move us one more past the eop_desc for start of next pkt */
|
|
tx_buffer++;
|
|
i++;
|
|
if (unlikely(i == tx_ring->count)) {
|
|
i = 0;
|
|
tx_buffer = tx_ring->tx_buffer_info;
|
|
}
|
|
}
|
|
|
|
/* reset next_to_use and next_to_clean */
|
|
tx_ring->next_to_use = 0;
|
|
tx_ring->next_to_clean = 0;
|
|
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
|
|
* @adapter: board private structure
|
|
**/
|
|
static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < adapter->num_rx_queues; i++)
|
|
ixgbevf_clean_rx_ring(adapter->rx_ring[i]);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
|
|
* @adapter: board private structure
|
|
**/
|
|
static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < adapter->num_tx_queues; i++)
|
|
ixgbevf_clean_tx_ring(adapter->tx_ring[i]);
|
|
for (i = 0; i < adapter->num_xdp_queues; i++)
|
|
ixgbevf_clean_tx_ring(adapter->xdp_ring[i]);
|
|
}
|
|
|
|
void ixgbevf_down(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct net_device *netdev = adapter->netdev;
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
int i;
|
|
|
|
/* signal that we are down to the interrupt handler */
|
|
if (test_and_set_bit(__IXGBEVF_DOWN, &adapter->state))
|
|
return; /* do nothing if already down */
|
|
|
|
/* disable all enabled Rx queues */
|
|
for (i = 0; i < adapter->num_rx_queues; i++)
|
|
ixgbevf_disable_rx_queue(adapter, adapter->rx_ring[i]);
|
|
|
|
usleep_range(10000, 20000);
|
|
|
|
netif_tx_stop_all_queues(netdev);
|
|
|
|
/* call carrier off first to avoid false dev_watchdog timeouts */
|
|
netif_carrier_off(netdev);
|
|
netif_tx_disable(netdev);
|
|
|
|
ixgbevf_irq_disable(adapter);
|
|
|
|
ixgbevf_napi_disable_all(adapter);
|
|
|
|
del_timer_sync(&adapter->service_timer);
|
|
|
|
/* disable transmits in the hardware now that interrupts are off */
|
|
for (i = 0; i < adapter->num_tx_queues; i++) {
|
|
u8 reg_idx = adapter->tx_ring[i]->reg_idx;
|
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
|
|
IXGBE_TXDCTL_SWFLSH);
|
|
}
|
|
|
|
for (i = 0; i < adapter->num_xdp_queues; i++) {
|
|
u8 reg_idx = adapter->xdp_ring[i]->reg_idx;
|
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
|
|
IXGBE_TXDCTL_SWFLSH);
|
|
}
|
|
|
|
if (!pci_channel_offline(adapter->pdev))
|
|
ixgbevf_reset(adapter);
|
|
|
|
ixgbevf_clean_all_tx_rings(adapter);
|
|
ixgbevf_clean_all_rx_rings(adapter);
|
|
}
|
|
|
|
void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
|
|
{
|
|
WARN_ON(in_interrupt());
|
|
|
|
while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
|
|
msleep(1);
|
|
|
|
ixgbevf_down(adapter);
|
|
ixgbevf_up(adapter);
|
|
|
|
clear_bit(__IXGBEVF_RESETTING, &adapter->state);
|
|
}
|
|
|
|
void ixgbevf_reset(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
struct net_device *netdev = adapter->netdev;
|
|
|
|
if (hw->mac.ops.reset_hw(hw)) {
|
|
hw_dbg(hw, "PF still resetting\n");
|
|
} else {
|
|
hw->mac.ops.init_hw(hw);
|
|
ixgbevf_negotiate_api(adapter);
|
|
}
|
|
|
|
if (is_valid_ether_addr(adapter->hw.mac.addr)) {
|
|
ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
|
|
ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
|
|
}
|
|
|
|
adapter->last_reset = jiffies;
|
|
}
|
|
|
|
static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
|
|
int vectors)
|
|
{
|
|
int vector_threshold;
|
|
|
|
/* We'll want at least 2 (vector_threshold):
|
|
* 1) TxQ[0] + RxQ[0] handler
|
|
* 2) Other (Link Status Change, etc.)
|
|
*/
|
|
vector_threshold = MIN_MSIX_COUNT;
|
|
|
|
/* The more we get, the more we will assign to Tx/Rx Cleanup
|
|
* for the separate queues...where Rx Cleanup >= Tx Cleanup.
|
|
* Right now, we simply care about how many we'll get; we'll
|
|
* set them up later while requesting irq's.
|
|
*/
|
|
vectors = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
|
|
vector_threshold, vectors);
|
|
|
|
if (vectors < 0) {
|
|
dev_err(&adapter->pdev->dev,
|
|
"Unable to allocate MSI-X interrupts\n");
|
|
kfree(adapter->msix_entries);
|
|
adapter->msix_entries = NULL;
|
|
return vectors;
|
|
}
|
|
|
|
/* Adjust for only the vectors we'll use, which is minimum
|
|
* of max_msix_q_vectors + NON_Q_VECTORS, or the number of
|
|
* vectors we were allocated.
|
|
*/
|
|
adapter->num_msix_vectors = vectors;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_set_num_queues - Allocate queues for device, feature dependent
|
|
* @adapter: board private structure to initialize
|
|
*
|
|
* This is the top level queue allocation routine. The order here is very
|
|
* important, starting with the "most" number of features turned on at once,
|
|
* and ending with the smallest set of features. This way large combinations
|
|
* can be allocated if they're turned on, and smaller combinations are the
|
|
* fallthrough conditions.
|
|
*
|
|
**/
|
|
static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
unsigned int def_q = 0;
|
|
unsigned int num_tcs = 0;
|
|
int err;
|
|
|
|
/* Start with base case */
|
|
adapter->num_rx_queues = 1;
|
|
adapter->num_tx_queues = 1;
|
|
adapter->num_xdp_queues = 0;
|
|
|
|
spin_lock_bh(&adapter->mbx_lock);
|
|
|
|
/* fetch queue configuration from the PF */
|
|
err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
|
|
|
|
spin_unlock_bh(&adapter->mbx_lock);
|
|
|
|
if (err)
|
|
return;
|
|
|
|
/* we need as many queues as traffic classes */
|
|
if (num_tcs > 1) {
|
|
adapter->num_rx_queues = num_tcs;
|
|
} else {
|
|
u16 rss = min_t(u16, num_online_cpus(), IXGBEVF_MAX_RSS_QUEUES);
|
|
|
|
switch (hw->api_version) {
|
|
case ixgbe_mbox_api_11:
|
|
case ixgbe_mbox_api_12:
|
|
case ixgbe_mbox_api_13:
|
|
if (adapter->xdp_prog &&
|
|
hw->mac.max_tx_queues == rss)
|
|
rss = rss > 3 ? 2 : 1;
|
|
|
|
adapter->num_rx_queues = rss;
|
|
adapter->num_tx_queues = rss;
|
|
adapter->num_xdp_queues = adapter->xdp_prog ? rss : 0;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
|
|
* @adapter: board private structure to initialize
|
|
*
|
|
* Attempt to configure the interrupts using the best available
|
|
* capabilities of the hardware and the kernel.
|
|
**/
|
|
static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
|
|
{
|
|
int vector, v_budget;
|
|
|
|
/* It's easy to be greedy for MSI-X vectors, but it really
|
|
* doesn't do us much good if we have a lot more vectors
|
|
* than CPU's. So let's be conservative and only ask for
|
|
* (roughly) the same number of vectors as there are CPU's.
|
|
* The default is to use pairs of vectors.
|
|
*/
|
|
v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
|
|
v_budget = min_t(int, v_budget, num_online_cpus());
|
|
v_budget += NON_Q_VECTORS;
|
|
|
|
adapter->msix_entries = kcalloc(v_budget,
|
|
sizeof(struct msix_entry), GFP_KERNEL);
|
|
if (!adapter->msix_entries)
|
|
return -ENOMEM;
|
|
|
|
for (vector = 0; vector < v_budget; vector++)
|
|
adapter->msix_entries[vector].entry = vector;
|
|
|
|
/* A failure in MSI-X entry allocation isn't fatal, but the VF driver
|
|
* does not support any other modes, so we will simply fail here. Note
|
|
* that we clean up the msix_entries pointer else-where.
|
|
*/
|
|
return ixgbevf_acquire_msix_vectors(adapter, v_budget);
|
|
}
|
|
|
|
static void ixgbevf_add_ring(struct ixgbevf_ring *ring,
|
|
struct ixgbevf_ring_container *head)
|
|
{
|
|
ring->next = head->ring;
|
|
head->ring = ring;
|
|
head->count++;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_alloc_q_vector - Allocate memory for a single interrupt vector
|
|
* @adapter: board private structure to initialize
|
|
* @v_idx: index of vector in adapter struct
|
|
* @txr_count: number of Tx rings for q vector
|
|
* @txr_idx: index of first Tx ring to assign
|
|
* @xdp_count: total number of XDP rings to allocate
|
|
* @xdp_idx: index of first XDP ring to allocate
|
|
* @rxr_count: number of Rx rings for q vector
|
|
* @rxr_idx: index of first Rx ring to assign
|
|
*
|
|
* We allocate one q_vector. If allocation fails we return -ENOMEM.
|
|
**/
|
|
static int ixgbevf_alloc_q_vector(struct ixgbevf_adapter *adapter, int v_idx,
|
|
int txr_count, int txr_idx,
|
|
int xdp_count, int xdp_idx,
|
|
int rxr_count, int rxr_idx)
|
|
{
|
|
struct ixgbevf_q_vector *q_vector;
|
|
int reg_idx = txr_idx + xdp_idx;
|
|
struct ixgbevf_ring *ring;
|
|
int ring_count, size;
|
|
|
|
ring_count = txr_count + xdp_count + rxr_count;
|
|
size = sizeof(*q_vector) + (sizeof(*ring) * ring_count);
|
|
|
|
/* allocate q_vector and rings */
|
|
q_vector = kzalloc(size, GFP_KERNEL);
|
|
if (!q_vector)
|
|
return -ENOMEM;
|
|
|
|
/* initialize NAPI */
|
|
netif_napi_add(adapter->netdev, &q_vector->napi, ixgbevf_poll, 64);
|
|
|
|
/* tie q_vector and adapter together */
|
|
adapter->q_vector[v_idx] = q_vector;
|
|
q_vector->adapter = adapter;
|
|
q_vector->v_idx = v_idx;
|
|
|
|
/* initialize pointer to rings */
|
|
ring = q_vector->ring;
|
|
|
|
while (txr_count) {
|
|
/* assign generic ring traits */
|
|
ring->dev = &adapter->pdev->dev;
|
|
ring->netdev = adapter->netdev;
|
|
|
|
/* configure backlink on ring */
|
|
ring->q_vector = q_vector;
|
|
|
|
/* update q_vector Tx values */
|
|
ixgbevf_add_ring(ring, &q_vector->tx);
|
|
|
|
/* apply Tx specific ring traits */
|
|
ring->count = adapter->tx_ring_count;
|
|
ring->queue_index = txr_idx;
|
|
ring->reg_idx = reg_idx;
|
|
|
|
/* assign ring to adapter */
|
|
adapter->tx_ring[txr_idx] = ring;
|
|
|
|
/* update count and index */
|
|
txr_count--;
|
|
txr_idx++;
|
|
reg_idx++;
|
|
|
|
/* push pointer to next ring */
|
|
ring++;
|
|
}
|
|
|
|
while (xdp_count) {
|
|
/* assign generic ring traits */
|
|
ring->dev = &adapter->pdev->dev;
|
|
ring->netdev = adapter->netdev;
|
|
|
|
/* configure backlink on ring */
|
|
ring->q_vector = q_vector;
|
|
|
|
/* update q_vector Tx values */
|
|
ixgbevf_add_ring(ring, &q_vector->tx);
|
|
|
|
/* apply Tx specific ring traits */
|
|
ring->count = adapter->tx_ring_count;
|
|
ring->queue_index = xdp_idx;
|
|
ring->reg_idx = reg_idx;
|
|
set_ring_xdp(ring);
|
|
|
|
/* assign ring to adapter */
|
|
adapter->xdp_ring[xdp_idx] = ring;
|
|
|
|
/* update count and index */
|
|
xdp_count--;
|
|
xdp_idx++;
|
|
reg_idx++;
|
|
|
|
/* push pointer to next ring */
|
|
ring++;
|
|
}
|
|
|
|
while (rxr_count) {
|
|
/* assign generic ring traits */
|
|
ring->dev = &adapter->pdev->dev;
|
|
ring->netdev = adapter->netdev;
|
|
|
|
/* configure backlink on ring */
|
|
ring->q_vector = q_vector;
|
|
|
|
/* update q_vector Rx values */
|
|
ixgbevf_add_ring(ring, &q_vector->rx);
|
|
|
|
/* apply Rx specific ring traits */
|
|
ring->count = adapter->rx_ring_count;
|
|
ring->queue_index = rxr_idx;
|
|
ring->reg_idx = rxr_idx;
|
|
|
|
/* assign ring to adapter */
|
|
adapter->rx_ring[rxr_idx] = ring;
|
|
|
|
/* update count and index */
|
|
rxr_count--;
|
|
rxr_idx++;
|
|
|
|
/* push pointer to next ring */
|
|
ring++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_free_q_vector - Free memory allocated for specific interrupt vector
|
|
* @adapter: board private structure to initialize
|
|
* @v_idx: index of vector in adapter struct
|
|
*
|
|
* This function frees the memory allocated to the q_vector. In addition if
|
|
* NAPI is enabled it will delete any references to the NAPI struct prior
|
|
* to freeing the q_vector.
|
|
**/
|
|
static void ixgbevf_free_q_vector(struct ixgbevf_adapter *adapter, int v_idx)
|
|
{
|
|
struct ixgbevf_q_vector *q_vector = adapter->q_vector[v_idx];
|
|
struct ixgbevf_ring *ring;
|
|
|
|
ixgbevf_for_each_ring(ring, q_vector->tx) {
|
|
if (ring_is_xdp(ring))
|
|
adapter->xdp_ring[ring->queue_index] = NULL;
|
|
else
|
|
adapter->tx_ring[ring->queue_index] = NULL;
|
|
}
|
|
|
|
ixgbevf_for_each_ring(ring, q_vector->rx)
|
|
adapter->rx_ring[ring->queue_index] = NULL;
|
|
|
|
adapter->q_vector[v_idx] = NULL;
|
|
netif_napi_del(&q_vector->napi);
|
|
|
|
/* ixgbevf_get_stats() might access the rings on this vector,
|
|
* we must wait a grace period before freeing it.
|
|
*/
|
|
kfree_rcu(q_vector, rcu);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
|
|
* @adapter: board private structure to initialize
|
|
*
|
|
* We allocate one q_vector per queue interrupt. If allocation fails we
|
|
* return -ENOMEM.
|
|
**/
|
|
static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
|
|
{
|
|
int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
|
|
int rxr_remaining = adapter->num_rx_queues;
|
|
int txr_remaining = adapter->num_tx_queues;
|
|
int xdp_remaining = adapter->num_xdp_queues;
|
|
int rxr_idx = 0, txr_idx = 0, xdp_idx = 0, v_idx = 0;
|
|
int err;
|
|
|
|
if (q_vectors >= (rxr_remaining + txr_remaining + xdp_remaining)) {
|
|
for (; rxr_remaining; v_idx++, q_vectors--) {
|
|
int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);
|
|
|
|
err = ixgbevf_alloc_q_vector(adapter, v_idx,
|
|
0, 0, 0, 0, rqpv, rxr_idx);
|
|
if (err)
|
|
goto err_out;
|
|
|
|
/* update counts and index */
|
|
rxr_remaining -= rqpv;
|
|
rxr_idx += rqpv;
|
|
}
|
|
}
|
|
|
|
for (; q_vectors; v_idx++, q_vectors--) {
|
|
int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);
|
|
int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors);
|
|
int xqpv = DIV_ROUND_UP(xdp_remaining, q_vectors);
|
|
|
|
err = ixgbevf_alloc_q_vector(adapter, v_idx,
|
|
tqpv, txr_idx,
|
|
xqpv, xdp_idx,
|
|
rqpv, rxr_idx);
|
|
|
|
if (err)
|
|
goto err_out;
|
|
|
|
/* update counts and index */
|
|
rxr_remaining -= rqpv;
|
|
rxr_idx += rqpv;
|
|
txr_remaining -= tqpv;
|
|
txr_idx += tqpv;
|
|
xdp_remaining -= xqpv;
|
|
xdp_idx += xqpv;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_out:
|
|
while (v_idx) {
|
|
v_idx--;
|
|
ixgbevf_free_q_vector(adapter, v_idx);
|
|
}
|
|
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
|
|
* @adapter: board private structure to initialize
|
|
*
|
|
* This function frees the memory allocated to the q_vectors. In addition if
|
|
* NAPI is enabled it will delete any references to the NAPI struct prior
|
|
* to freeing the q_vector.
|
|
**/
|
|
static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
|
|
{
|
|
int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
|
|
|
|
while (q_vectors) {
|
|
q_vectors--;
|
|
ixgbevf_free_q_vector(adapter, q_vectors);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_reset_interrupt_capability - Reset MSIX setup
|
|
* @adapter: board private structure
|
|
*
|
|
**/
|
|
static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
|
|
{
|
|
if (!adapter->msix_entries)
|
|
return;
|
|
|
|
pci_disable_msix(adapter->pdev);
|
|
kfree(adapter->msix_entries);
|
|
adapter->msix_entries = NULL;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
|
|
* @adapter: board private structure to initialize
|
|
*
|
|
**/
|
|
static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
|
|
{
|
|
int err;
|
|
|
|
/* Number of supported queues */
|
|
ixgbevf_set_num_queues(adapter);
|
|
|
|
err = ixgbevf_set_interrupt_capability(adapter);
|
|
if (err) {
|
|
hw_dbg(&adapter->hw,
|
|
"Unable to setup interrupt capabilities\n");
|
|
goto err_set_interrupt;
|
|
}
|
|
|
|
err = ixgbevf_alloc_q_vectors(adapter);
|
|
if (err) {
|
|
hw_dbg(&adapter->hw, "Unable to allocate memory for queue vectors\n");
|
|
goto err_alloc_q_vectors;
|
|
}
|
|
|
|
hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u XDP Queue count %u\n",
|
|
(adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
|
|
adapter->num_rx_queues, adapter->num_tx_queues,
|
|
adapter->num_xdp_queues);
|
|
|
|
set_bit(__IXGBEVF_DOWN, &adapter->state);
|
|
|
|
return 0;
|
|
err_alloc_q_vectors:
|
|
ixgbevf_reset_interrupt_capability(adapter);
|
|
err_set_interrupt:
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
|
|
* @adapter: board private structure to clear interrupt scheme on
|
|
*
|
|
* We go through and clear interrupt specific resources and reset the structure
|
|
* to pre-load conditions
|
|
**/
|
|
static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
|
|
{
|
|
adapter->num_tx_queues = 0;
|
|
adapter->num_xdp_queues = 0;
|
|
adapter->num_rx_queues = 0;
|
|
|
|
ixgbevf_free_q_vectors(adapter);
|
|
ixgbevf_reset_interrupt_capability(adapter);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_sw_init - Initialize general software structures
|
|
* @adapter: board private structure to initialize
|
|
*
|
|
* ixgbevf_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 ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
struct pci_dev *pdev = adapter->pdev;
|
|
struct net_device *netdev = adapter->netdev;
|
|
int err;
|
|
|
|
/* PCI config space info */
|
|
hw->vendor_id = pdev->vendor;
|
|
hw->device_id = pdev->device;
|
|
hw->revision_id = pdev->revision;
|
|
hw->subsystem_vendor_id = pdev->subsystem_vendor;
|
|
hw->subsystem_device_id = pdev->subsystem_device;
|
|
|
|
hw->mbx.ops.init_params(hw);
|
|
|
|
if (hw->mac.type >= ixgbe_mac_X550_vf) {
|
|
err = ixgbevf_init_rss_key(adapter);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
|
|
/* assume legacy case in which PF would only give VF 2 queues */
|
|
hw->mac.max_tx_queues = 2;
|
|
hw->mac.max_rx_queues = 2;
|
|
|
|
/* lock to protect mailbox accesses */
|
|
spin_lock_init(&adapter->mbx_lock);
|
|
|
|
err = hw->mac.ops.reset_hw(hw);
|
|
if (err) {
|
|
dev_info(&pdev->dev,
|
|
"PF still in reset state. Is the PF interface up?\n");
|
|
} else {
|
|
err = hw->mac.ops.init_hw(hw);
|
|
if (err) {
|
|
pr_err("init_shared_code failed: %d\n", err);
|
|
goto out;
|
|
}
|
|
ixgbevf_negotiate_api(adapter);
|
|
err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
|
|
if (err)
|
|
dev_info(&pdev->dev, "Error reading MAC address\n");
|
|
else if (is_zero_ether_addr(adapter->hw.mac.addr))
|
|
dev_info(&pdev->dev,
|
|
"MAC address not assigned by administrator.\n");
|
|
ether_addr_copy(netdev->dev_addr, hw->mac.addr);
|
|
}
|
|
|
|
if (!is_valid_ether_addr(netdev->dev_addr)) {
|
|
dev_info(&pdev->dev, "Assigning random MAC address\n");
|
|
eth_hw_addr_random(netdev);
|
|
ether_addr_copy(hw->mac.addr, netdev->dev_addr);
|
|
ether_addr_copy(hw->mac.perm_addr, netdev->dev_addr);
|
|
}
|
|
|
|
/* Enable dynamic interrupt throttling rates */
|
|
adapter->rx_itr_setting = 1;
|
|
adapter->tx_itr_setting = 1;
|
|
|
|
/* set default ring sizes */
|
|
adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
|
|
adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
|
|
|
|
set_bit(__IXGBEVF_DOWN, &adapter->state);
|
|
return 0;
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
#define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \
|
|
{ \
|
|
u32 current_counter = IXGBE_READ_REG(hw, reg); \
|
|
if (current_counter < last_counter) \
|
|
counter += 0x100000000LL; \
|
|
last_counter = current_counter; \
|
|
counter &= 0xFFFFFFFF00000000LL; \
|
|
counter |= current_counter; \
|
|
}
|
|
|
|
#define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
|
|
{ \
|
|
u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \
|
|
u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \
|
|
u64 current_counter = (current_counter_msb << 32) | \
|
|
current_counter_lsb; \
|
|
if (current_counter < last_counter) \
|
|
counter += 0x1000000000LL; \
|
|
last_counter = current_counter; \
|
|
counter &= 0xFFFFFFF000000000LL; \
|
|
counter |= current_counter; \
|
|
}
|
|
/**
|
|
* ixgbevf_update_stats - Update the board statistics counters.
|
|
* @adapter: board private structure
|
|
**/
|
|
void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
|
|
u64 alloc_rx_page = 0, hw_csum_rx_error = 0;
|
|
int i;
|
|
|
|
if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
|
|
test_bit(__IXGBEVF_RESETTING, &adapter->state))
|
|
return;
|
|
|
|
UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
|
|
adapter->stats.vfgprc);
|
|
UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
|
|
adapter->stats.vfgptc);
|
|
UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
|
|
adapter->stats.last_vfgorc,
|
|
adapter->stats.vfgorc);
|
|
UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
|
|
adapter->stats.last_vfgotc,
|
|
adapter->stats.vfgotc);
|
|
UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
|
|
adapter->stats.vfmprc);
|
|
|
|
for (i = 0; i < adapter->num_rx_queues; i++) {
|
|
struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];
|
|
|
|
hw_csum_rx_error += rx_ring->rx_stats.csum_err;
|
|
alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
|
|
alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
|
|
alloc_rx_page += rx_ring->rx_stats.alloc_rx_page;
|
|
}
|
|
|
|
adapter->hw_csum_rx_error = hw_csum_rx_error;
|
|
adapter->alloc_rx_page_failed = alloc_rx_page_failed;
|
|
adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
|
|
adapter->alloc_rx_page = alloc_rx_page;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_service_timer - Timer Call-back
|
|
* @t: pointer to timer_list struct
|
|
**/
|
|
static void ixgbevf_service_timer(struct timer_list *t)
|
|
{
|
|
struct ixgbevf_adapter *adapter = from_timer(adapter, t,
|
|
service_timer);
|
|
|
|
/* Reset the timer */
|
|
mod_timer(&adapter->service_timer, (HZ * 2) + jiffies);
|
|
|
|
ixgbevf_service_event_schedule(adapter);
|
|
}
|
|
|
|
static void ixgbevf_reset_subtask(struct ixgbevf_adapter *adapter)
|
|
{
|
|
if (!test_and_clear_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state))
|
|
return;
|
|
|
|
rtnl_lock();
|
|
/* If we're already down or resetting, just bail */
|
|
if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
|
|
test_bit(__IXGBEVF_REMOVING, &adapter->state) ||
|
|
test_bit(__IXGBEVF_RESETTING, &adapter->state)) {
|
|
rtnl_unlock();
|
|
return;
|
|
}
|
|
|
|
adapter->tx_timeout_count++;
|
|
|
|
ixgbevf_reinit_locked(adapter);
|
|
rtnl_unlock();
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_check_hang_subtask - check for hung queues and dropped interrupts
|
|
* @adapter: pointer to the device adapter structure
|
|
*
|
|
* This function serves two purposes. First it strobes the interrupt lines
|
|
* in order to make certain interrupts are occurring. Secondly it sets the
|
|
* bits needed to check for TX hangs. As a result we should immediately
|
|
* determine if a hang has occurred.
|
|
**/
|
|
static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
u32 eics = 0;
|
|
int i;
|
|
|
|
/* If we're down or resetting, just bail */
|
|
if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
|
|
test_bit(__IXGBEVF_RESETTING, &adapter->state))
|
|
return;
|
|
|
|
/* Force detection of hung controller */
|
|
if (netif_carrier_ok(adapter->netdev)) {
|
|
for (i = 0; i < adapter->num_tx_queues; i++)
|
|
set_check_for_tx_hang(adapter->tx_ring[i]);
|
|
for (i = 0; i < adapter->num_xdp_queues; i++)
|
|
set_check_for_tx_hang(adapter->xdp_ring[i]);
|
|
}
|
|
|
|
/* get one bit for every active Tx/Rx interrupt vector */
|
|
for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
|
|
struct ixgbevf_q_vector *qv = adapter->q_vector[i];
|
|
|
|
if (qv->rx.ring || qv->tx.ring)
|
|
eics |= BIT(i);
|
|
}
|
|
|
|
/* Cause software interrupt to ensure rings are cleaned */
|
|
IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_watchdog_update_link - update the link status
|
|
* @adapter: pointer to the device adapter structure
|
|
**/
|
|
static void ixgbevf_watchdog_update_link(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
u32 link_speed = adapter->link_speed;
|
|
bool link_up = adapter->link_up;
|
|
s32 err;
|
|
|
|
spin_lock_bh(&adapter->mbx_lock);
|
|
|
|
err = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
|
|
|
|
spin_unlock_bh(&adapter->mbx_lock);
|
|
|
|
/* if check for link returns error we will need to reset */
|
|
if (err && time_after(jiffies, adapter->last_reset + (10 * HZ))) {
|
|
set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);
|
|
link_up = false;
|
|
}
|
|
|
|
adapter->link_up = link_up;
|
|
adapter->link_speed = link_speed;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_watchdog_link_is_up - update netif_carrier status and
|
|
* print link up message
|
|
* @adapter: pointer to the device adapter structure
|
|
**/
|
|
static void ixgbevf_watchdog_link_is_up(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct net_device *netdev = adapter->netdev;
|
|
|
|
/* only continue if link was previously down */
|
|
if (netif_carrier_ok(netdev))
|
|
return;
|
|
|
|
dev_info(&adapter->pdev->dev, "NIC Link is Up %s\n",
|
|
(adapter->link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?
|
|
"10 Gbps" :
|
|
(adapter->link_speed == IXGBE_LINK_SPEED_1GB_FULL) ?
|
|
"1 Gbps" :
|
|
(adapter->link_speed == IXGBE_LINK_SPEED_100_FULL) ?
|
|
"100 Mbps" :
|
|
"unknown speed");
|
|
|
|
netif_carrier_on(netdev);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_watchdog_link_is_down - update netif_carrier status and
|
|
* print link down message
|
|
* @adapter: pointer to the adapter structure
|
|
**/
|
|
static void ixgbevf_watchdog_link_is_down(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct net_device *netdev = adapter->netdev;
|
|
|
|
adapter->link_speed = 0;
|
|
|
|
/* only continue if link was up previously */
|
|
if (!netif_carrier_ok(netdev))
|
|
return;
|
|
|
|
dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
|
|
|
|
netif_carrier_off(netdev);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_watchdog_subtask - worker thread to bring link up
|
|
* @adapter: board private structure
|
|
**/
|
|
static void ixgbevf_watchdog_subtask(struct ixgbevf_adapter *adapter)
|
|
{
|
|
/* if interface is down do nothing */
|
|
if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
|
|
test_bit(__IXGBEVF_RESETTING, &adapter->state))
|
|
return;
|
|
|
|
ixgbevf_watchdog_update_link(adapter);
|
|
|
|
if (adapter->link_up)
|
|
ixgbevf_watchdog_link_is_up(adapter);
|
|
else
|
|
ixgbevf_watchdog_link_is_down(adapter);
|
|
|
|
ixgbevf_update_stats(adapter);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_service_task - manages and runs subtasks
|
|
* @work: pointer to work_struct containing our data
|
|
**/
|
|
static void ixgbevf_service_task(struct work_struct *work)
|
|
{
|
|
struct ixgbevf_adapter *adapter = container_of(work,
|
|
struct ixgbevf_adapter,
|
|
service_task);
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
|
|
if (IXGBE_REMOVED(hw->hw_addr)) {
|
|
if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
|
|
rtnl_lock();
|
|
ixgbevf_down(adapter);
|
|
rtnl_unlock();
|
|
}
|
|
return;
|
|
}
|
|
|
|
ixgbevf_queue_reset_subtask(adapter);
|
|
ixgbevf_reset_subtask(adapter);
|
|
ixgbevf_watchdog_subtask(adapter);
|
|
ixgbevf_check_hang_subtask(adapter);
|
|
|
|
ixgbevf_service_event_complete(adapter);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_free_tx_resources - Free Tx Resources per Queue
|
|
* @tx_ring: Tx descriptor ring for a specific queue
|
|
*
|
|
* Free all transmit software resources
|
|
**/
|
|
void ixgbevf_free_tx_resources(struct ixgbevf_ring *tx_ring)
|
|
{
|
|
ixgbevf_clean_tx_ring(tx_ring);
|
|
|
|
vfree(tx_ring->tx_buffer_info);
|
|
tx_ring->tx_buffer_info = NULL;
|
|
|
|
/* if not set, then don't free */
|
|
if (!tx_ring->desc)
|
|
return;
|
|
|
|
dma_free_coherent(tx_ring->dev, tx_ring->size, tx_ring->desc,
|
|
tx_ring->dma);
|
|
|
|
tx_ring->desc = NULL;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
|
|
* @adapter: board private structure
|
|
*
|
|
* Free all transmit software resources
|
|
**/
|
|
static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < adapter->num_tx_queues; i++)
|
|
if (adapter->tx_ring[i]->desc)
|
|
ixgbevf_free_tx_resources(adapter->tx_ring[i]);
|
|
for (i = 0; i < adapter->num_xdp_queues; i++)
|
|
if (adapter->xdp_ring[i]->desc)
|
|
ixgbevf_free_tx_resources(adapter->xdp_ring[i]);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
|
|
* @tx_ring: Tx descriptor ring (for a specific queue) to setup
|
|
*
|
|
* Return 0 on success, negative on failure
|
|
**/
|
|
int ixgbevf_setup_tx_resources(struct ixgbevf_ring *tx_ring)
|
|
{
|
|
struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);
|
|
int size;
|
|
|
|
size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
|
|
tx_ring->tx_buffer_info = vmalloc(size);
|
|
if (!tx_ring->tx_buffer_info)
|
|
goto err;
|
|
|
|
u64_stats_init(&tx_ring->syncp);
|
|
|
|
/* round up to nearest 4K */
|
|
tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
|
|
tx_ring->size = ALIGN(tx_ring->size, 4096);
|
|
|
|
tx_ring->desc = dma_alloc_coherent(tx_ring->dev, tx_ring->size,
|
|
&tx_ring->dma, GFP_KERNEL);
|
|
if (!tx_ring->desc)
|
|
goto err;
|
|
|
|
return 0;
|
|
|
|
err:
|
|
vfree(tx_ring->tx_buffer_info);
|
|
tx_ring->tx_buffer_info = NULL;
|
|
hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit descriptor ring\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
|
|
* @adapter: board private structure
|
|
*
|
|
* If this function returns with an error, then it's possible one or
|
|
* more of the rings is populated (while the rest are not). It is the
|
|
* callers duty to clean those orphaned rings.
|
|
*
|
|
* Return 0 on success, negative on failure
|
|
**/
|
|
static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
|
|
{
|
|
int i, j = 0, err = 0;
|
|
|
|
for (i = 0; i < adapter->num_tx_queues; i++) {
|
|
err = ixgbevf_setup_tx_resources(adapter->tx_ring[i]);
|
|
if (!err)
|
|
continue;
|
|
hw_dbg(&adapter->hw, "Allocation for Tx Queue %u failed\n", i);
|
|
goto err_setup_tx;
|
|
}
|
|
|
|
for (j = 0; j < adapter->num_xdp_queues; j++) {
|
|
err = ixgbevf_setup_tx_resources(adapter->xdp_ring[j]);
|
|
if (!err)
|
|
continue;
|
|
hw_dbg(&adapter->hw, "Allocation for XDP Queue %u failed\n", j);
|
|
goto err_setup_tx;
|
|
}
|
|
|
|
return 0;
|
|
err_setup_tx:
|
|
/* rewind the index freeing the rings as we go */
|
|
while (j--)
|
|
ixgbevf_free_tx_resources(adapter->xdp_ring[j]);
|
|
while (i--)
|
|
ixgbevf_free_tx_resources(adapter->tx_ring[i]);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
|
|
* @adapter: board private structure
|
|
* @rx_ring: Rx descriptor ring (for a specific queue) to setup
|
|
*
|
|
* Returns 0 on success, negative on failure
|
|
**/
|
|
int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
|
|
struct ixgbevf_ring *rx_ring)
|
|
{
|
|
int size;
|
|
|
|
size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
|
|
rx_ring->rx_buffer_info = vmalloc(size);
|
|
if (!rx_ring->rx_buffer_info)
|
|
goto err;
|
|
|
|
u64_stats_init(&rx_ring->syncp);
|
|
|
|
/* Round up to nearest 4K */
|
|
rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
|
|
rx_ring->size = ALIGN(rx_ring->size, 4096);
|
|
|
|
rx_ring->desc = dma_alloc_coherent(rx_ring->dev, rx_ring->size,
|
|
&rx_ring->dma, GFP_KERNEL);
|
|
|
|
if (!rx_ring->desc)
|
|
goto err;
|
|
|
|
/* XDP RX-queue info */
|
|
if (xdp_rxq_info_reg(&rx_ring->xdp_rxq, adapter->netdev,
|
|
rx_ring->queue_index) < 0)
|
|
goto err;
|
|
|
|
rx_ring->xdp_prog = adapter->xdp_prog;
|
|
|
|
return 0;
|
|
err:
|
|
vfree(rx_ring->rx_buffer_info);
|
|
rx_ring->rx_buffer_info = NULL;
|
|
dev_err(rx_ring->dev, "Unable to allocate memory for the Rx descriptor ring\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
|
|
* @adapter: board private structure
|
|
*
|
|
* If this function returns with an error, then it's possible one or
|
|
* more of the rings is populated (while the rest are not). It is the
|
|
* callers duty to clean those orphaned rings.
|
|
*
|
|
* Return 0 on success, negative on failure
|
|
**/
|
|
static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
|
|
{
|
|
int i, err = 0;
|
|
|
|
for (i = 0; i < adapter->num_rx_queues; i++) {
|
|
err = ixgbevf_setup_rx_resources(adapter, adapter->rx_ring[i]);
|
|
if (!err)
|
|
continue;
|
|
hw_dbg(&adapter->hw, "Allocation for Rx Queue %u failed\n", i);
|
|
goto err_setup_rx;
|
|
}
|
|
|
|
return 0;
|
|
err_setup_rx:
|
|
/* rewind the index freeing the rings as we go */
|
|
while (i--)
|
|
ixgbevf_free_rx_resources(adapter->rx_ring[i]);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_free_rx_resources - Free Rx Resources
|
|
* @rx_ring: ring to clean the resources from
|
|
*
|
|
* Free all receive software resources
|
|
**/
|
|
void ixgbevf_free_rx_resources(struct ixgbevf_ring *rx_ring)
|
|
{
|
|
ixgbevf_clean_rx_ring(rx_ring);
|
|
|
|
rx_ring->xdp_prog = NULL;
|
|
xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
|
|
vfree(rx_ring->rx_buffer_info);
|
|
rx_ring->rx_buffer_info = NULL;
|
|
|
|
dma_free_coherent(rx_ring->dev, rx_ring->size, rx_ring->desc,
|
|
rx_ring->dma);
|
|
|
|
rx_ring->desc = NULL;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
|
|
* @adapter: board private structure
|
|
*
|
|
* Free all receive software resources
|
|
**/
|
|
static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < adapter->num_rx_queues; i++)
|
|
if (adapter->rx_ring[i]->desc)
|
|
ixgbevf_free_rx_resources(adapter->rx_ring[i]);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_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.
|
|
**/
|
|
int ixgbevf_open(struct net_device *netdev)
|
|
{
|
|
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
int err;
|
|
|
|
/* A previous failure to open the device because of a lack of
|
|
* available MSIX vector resources may have reset the number
|
|
* of msix vectors variable to zero. The only way to recover
|
|
* is to unload/reload the driver and hope that the system has
|
|
* been able to recover some MSIX vector resources.
|
|
*/
|
|
if (!adapter->num_msix_vectors)
|
|
return -ENOMEM;
|
|
|
|
if (hw->adapter_stopped) {
|
|
ixgbevf_reset(adapter);
|
|
/* if adapter is still stopped then PF isn't up and
|
|
* the VF can't start.
|
|
*/
|
|
if (hw->adapter_stopped) {
|
|
err = IXGBE_ERR_MBX;
|
|
pr_err("Unable to start - perhaps the PF Driver isn't up yet\n");
|
|
goto err_setup_reset;
|
|
}
|
|
}
|
|
|
|
/* disallow open during test */
|
|
if (test_bit(__IXGBEVF_TESTING, &adapter->state))
|
|
return -EBUSY;
|
|
|
|
netif_carrier_off(netdev);
|
|
|
|
/* allocate transmit descriptors */
|
|
err = ixgbevf_setup_all_tx_resources(adapter);
|
|
if (err)
|
|
goto err_setup_tx;
|
|
|
|
/* allocate receive descriptors */
|
|
err = ixgbevf_setup_all_rx_resources(adapter);
|
|
if (err)
|
|
goto err_setup_rx;
|
|
|
|
ixgbevf_configure(adapter);
|
|
|
|
err = ixgbevf_request_irq(adapter);
|
|
if (err)
|
|
goto err_req_irq;
|
|
|
|
/* Notify the stack of the actual queue counts. */
|
|
err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
|
|
if (err)
|
|
goto err_set_queues;
|
|
|
|
err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
|
|
if (err)
|
|
goto err_set_queues;
|
|
|
|
ixgbevf_up_complete(adapter);
|
|
|
|
return 0;
|
|
|
|
err_set_queues:
|
|
ixgbevf_free_irq(adapter);
|
|
err_req_irq:
|
|
ixgbevf_free_all_rx_resources(adapter);
|
|
err_setup_rx:
|
|
ixgbevf_free_all_tx_resources(adapter);
|
|
err_setup_tx:
|
|
ixgbevf_reset(adapter);
|
|
err_setup_reset:
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_close_suspend - actions necessary to both suspend and close flows
|
|
* @adapter: the private adapter struct
|
|
*
|
|
* This function should contain the necessary work common to both suspending
|
|
* and closing of the device.
|
|
*/
|
|
static void ixgbevf_close_suspend(struct ixgbevf_adapter *adapter)
|
|
{
|
|
ixgbevf_down(adapter);
|
|
ixgbevf_free_irq(adapter);
|
|
ixgbevf_free_all_tx_resources(adapter);
|
|
ixgbevf_free_all_rx_resources(adapter);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_close - Disables a network interface
|
|
* @netdev: network interface device structure
|
|
*
|
|
* Returns 0, this is not allowed to fail
|
|
*
|
|
* The close entry point is called when an interface is de-activated
|
|
* by the OS. The hardware is still under the drivers control, but
|
|
* needs to be disabled. A global MAC reset is issued to stop the
|
|
* hardware, and all transmit and receive resources are freed.
|
|
**/
|
|
int ixgbevf_close(struct net_device *netdev)
|
|
{
|
|
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
|
|
|
|
if (netif_device_present(netdev))
|
|
ixgbevf_close_suspend(adapter);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter)
|
|
{
|
|
struct net_device *dev = adapter->netdev;
|
|
|
|
if (!test_and_clear_bit(__IXGBEVF_QUEUE_RESET_REQUESTED,
|
|
&adapter->state))
|
|
return;
|
|
|
|
/* if interface is down do nothing */
|
|
if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
|
|
test_bit(__IXGBEVF_RESETTING, &adapter->state))
|
|
return;
|
|
|
|
/* Hardware has to reinitialize queues and interrupts to
|
|
* match packet buffer alignment. Unfortunately, the
|
|
* hardware is not flexible enough to do this dynamically.
|
|
*/
|
|
rtnl_lock();
|
|
|
|
if (netif_running(dev))
|
|
ixgbevf_close(dev);
|
|
|
|
ixgbevf_clear_interrupt_scheme(adapter);
|
|
ixgbevf_init_interrupt_scheme(adapter);
|
|
|
|
if (netif_running(dev))
|
|
ixgbevf_open(dev);
|
|
|
|
rtnl_unlock();
|
|
}
|
|
|
|
static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
|
|
u32 vlan_macip_lens, u32 type_tucmd,
|
|
u32 mss_l4len_idx)
|
|
{
|
|
struct ixgbe_adv_tx_context_desc *context_desc;
|
|
u16 i = tx_ring->next_to_use;
|
|
|
|
context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
|
|
|
|
i++;
|
|
tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
|
|
|
|
/* set bits to identify this as an advanced context descriptor */
|
|
type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
|
|
|
|
context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
|
|
context_desc->seqnum_seed = 0;
|
|
context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
|
|
context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
|
|
}
|
|
|
|
static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
|
|
struct ixgbevf_tx_buffer *first,
|
|
u8 *hdr_len)
|
|
{
|
|
u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
|
|
struct sk_buff *skb = first->skb;
|
|
union {
|
|
struct iphdr *v4;
|
|
struct ipv6hdr *v6;
|
|
unsigned char *hdr;
|
|
} ip;
|
|
union {
|
|
struct tcphdr *tcp;
|
|
unsigned char *hdr;
|
|
} l4;
|
|
u32 paylen, l4_offset;
|
|
int err;
|
|
|
|
if (skb->ip_summed != CHECKSUM_PARTIAL)
|
|
return 0;
|
|
|
|
if (!skb_is_gso(skb))
|
|
return 0;
|
|
|
|
err = skb_cow_head(skb, 0);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (eth_p_mpls(first->protocol))
|
|
ip.hdr = skb_inner_network_header(skb);
|
|
else
|
|
ip.hdr = skb_network_header(skb);
|
|
l4.hdr = skb_checksum_start(skb);
|
|
|
|
/* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
|
|
type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
|
|
|
|
/* initialize outer IP header fields */
|
|
if (ip.v4->version == 4) {
|
|
unsigned char *csum_start = skb_checksum_start(skb);
|
|
unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
|
|
|
|
/* IP header will have to cancel out any data that
|
|
* is not a part of the outer IP header
|
|
*/
|
|
ip.v4->check = csum_fold(csum_partial(trans_start,
|
|
csum_start - trans_start,
|
|
0));
|
|
type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
|
|
|
|
ip.v4->tot_len = 0;
|
|
first->tx_flags |= IXGBE_TX_FLAGS_TSO |
|
|
IXGBE_TX_FLAGS_CSUM |
|
|
IXGBE_TX_FLAGS_IPV4;
|
|
} else {
|
|
ip.v6->payload_len = 0;
|
|
first->tx_flags |= IXGBE_TX_FLAGS_TSO |
|
|
IXGBE_TX_FLAGS_CSUM;
|
|
}
|
|
|
|
/* determine offset of inner transport header */
|
|
l4_offset = l4.hdr - skb->data;
|
|
|
|
/* compute length of segmentation header */
|
|
*hdr_len = (l4.tcp->doff * 4) + l4_offset;
|
|
|
|
/* remove payload length from inner checksum */
|
|
paylen = skb->len - l4_offset;
|
|
csum_replace_by_diff(&l4.tcp->check, htonl(paylen));
|
|
|
|
/* update gso size and bytecount with header size */
|
|
first->gso_segs = skb_shinfo(skb)->gso_segs;
|
|
first->bytecount += (first->gso_segs - 1) * *hdr_len;
|
|
|
|
/* mss_l4len_id: use 1 as index for TSO */
|
|
mss_l4len_idx = (*hdr_len - l4_offset) << IXGBE_ADVTXD_L4LEN_SHIFT;
|
|
mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
|
|
mss_l4len_idx |= (1u << IXGBE_ADVTXD_IDX_SHIFT);
|
|
|
|
/* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
|
|
vlan_macip_lens = l4.hdr - ip.hdr;
|
|
vlan_macip_lens |= (ip.hdr - skb->data) << IXGBE_ADVTXD_MACLEN_SHIFT;
|
|
vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
|
|
|
|
ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
|
|
type_tucmd, mss_l4len_idx);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static inline bool ixgbevf_ipv6_csum_is_sctp(struct sk_buff *skb)
|
|
{
|
|
unsigned int offset = 0;
|
|
|
|
ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);
|
|
|
|
return offset == skb_checksum_start_offset(skb);
|
|
}
|
|
|
|
static void ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
|
|
struct ixgbevf_tx_buffer *first)
|
|
{
|
|
struct sk_buff *skb = first->skb;
|
|
u32 vlan_macip_lens = 0;
|
|
u32 type_tucmd = 0;
|
|
|
|
if (skb->ip_summed != CHECKSUM_PARTIAL)
|
|
goto no_csum;
|
|
|
|
switch (skb->csum_offset) {
|
|
case offsetof(struct tcphdr, check):
|
|
type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
|
|
/* fall through */
|
|
case offsetof(struct udphdr, check):
|
|
break;
|
|
case offsetof(struct sctphdr, checksum):
|
|
/* validate that this is actually an SCTP request */
|
|
if (((first->protocol == htons(ETH_P_IP)) &&
|
|
(ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
|
|
((first->protocol == htons(ETH_P_IPV6)) &&
|
|
ixgbevf_ipv6_csum_is_sctp(skb))) {
|
|
type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;
|
|
break;
|
|
}
|
|
/* fall through */
|
|
default:
|
|
skb_checksum_help(skb);
|
|
goto no_csum;
|
|
}
|
|
|
|
if (first->protocol == htons(ETH_P_IP))
|
|
type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
|
|
|
|
/* update TX checksum flag */
|
|
first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
|
|
vlan_macip_lens = skb_checksum_start_offset(skb) -
|
|
skb_network_offset(skb);
|
|
no_csum:
|
|
/* vlan_macip_lens: MACLEN, VLAN tag */
|
|
vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
|
|
vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
|
|
|
|
ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, 0);
|
|
}
|
|
|
|
static __le32 ixgbevf_tx_cmd_type(u32 tx_flags)
|
|
{
|
|
/* set type for advanced descriptor with frame checksum insertion */
|
|
__le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA |
|
|
IXGBE_ADVTXD_DCMD_IFCS |
|
|
IXGBE_ADVTXD_DCMD_DEXT);
|
|
|
|
/* set HW VLAN bit if VLAN is present */
|
|
if (tx_flags & IXGBE_TX_FLAGS_VLAN)
|
|
cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE);
|
|
|
|
/* set segmentation enable bits for TSO/FSO */
|
|
if (tx_flags & IXGBE_TX_FLAGS_TSO)
|
|
cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE);
|
|
|
|
return cmd_type;
|
|
}
|
|
|
|
static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
|
|
u32 tx_flags, unsigned int paylen)
|
|
{
|
|
__le32 olinfo_status = cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT);
|
|
|
|
/* enable L4 checksum for TSO and TX checksum offload */
|
|
if (tx_flags & IXGBE_TX_FLAGS_CSUM)
|
|
olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM);
|
|
|
|
/* enble IPv4 checksum for TSO */
|
|
if (tx_flags & IXGBE_TX_FLAGS_IPV4)
|
|
olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM);
|
|
|
|
/* use index 1 context for TSO/FSO/FCOE */
|
|
if (tx_flags & IXGBE_TX_FLAGS_TSO)
|
|
olinfo_status |= cpu_to_le32(1u << IXGBE_ADVTXD_IDX_SHIFT);
|
|
|
|
/* Check Context must be set if Tx switch is enabled, which it
|
|
* always is for case where virtual functions are running
|
|
*/
|
|
olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC);
|
|
|
|
tx_desc->read.olinfo_status = olinfo_status;
|
|
}
|
|
|
|
static void ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
|
|
struct ixgbevf_tx_buffer *first,
|
|
const u8 hdr_len)
|
|
{
|
|
struct sk_buff *skb = first->skb;
|
|
struct ixgbevf_tx_buffer *tx_buffer;
|
|
union ixgbe_adv_tx_desc *tx_desc;
|
|
struct skb_frag_struct *frag;
|
|
dma_addr_t dma;
|
|
unsigned int data_len, size;
|
|
u32 tx_flags = first->tx_flags;
|
|
__le32 cmd_type = ixgbevf_tx_cmd_type(tx_flags);
|
|
u16 i = tx_ring->next_to_use;
|
|
|
|
tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
|
|
|
|
ixgbevf_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);
|
|
|
|
size = skb_headlen(skb);
|
|
data_len = skb->data_len;
|
|
|
|
dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
|
|
|
|
tx_buffer = first;
|
|
|
|
for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
|
|
if (dma_mapping_error(tx_ring->dev, dma))
|
|
goto dma_error;
|
|
|
|
/* record length, and DMA address */
|
|
dma_unmap_len_set(tx_buffer, len, size);
|
|
dma_unmap_addr_set(tx_buffer, dma, dma);
|
|
|
|
tx_desc->read.buffer_addr = cpu_to_le64(dma);
|
|
|
|
while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
|
|
tx_desc->read.cmd_type_len =
|
|
cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD);
|
|
|
|
i++;
|
|
tx_desc++;
|
|
if (i == tx_ring->count) {
|
|
tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
|
|
i = 0;
|
|
}
|
|
tx_desc->read.olinfo_status = 0;
|
|
|
|
dma += IXGBE_MAX_DATA_PER_TXD;
|
|
size -= IXGBE_MAX_DATA_PER_TXD;
|
|
|
|
tx_desc->read.buffer_addr = cpu_to_le64(dma);
|
|
}
|
|
|
|
if (likely(!data_len))
|
|
break;
|
|
|
|
tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size);
|
|
|
|
i++;
|
|
tx_desc++;
|
|
if (i == tx_ring->count) {
|
|
tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
|
|
i = 0;
|
|
}
|
|
tx_desc->read.olinfo_status = 0;
|
|
|
|
size = skb_frag_size(frag);
|
|
data_len -= size;
|
|
|
|
dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
|
|
DMA_TO_DEVICE);
|
|
|
|
tx_buffer = &tx_ring->tx_buffer_info[i];
|
|
}
|
|
|
|
/* write last descriptor with RS and EOP bits */
|
|
cmd_type |= cpu_to_le32(size) | cpu_to_le32(IXGBE_TXD_CMD);
|
|
tx_desc->read.cmd_type_len = cmd_type;
|
|
|
|
/* set the timestamp */
|
|
first->time_stamp = jiffies;
|
|
|
|
/* 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).
|
|
*
|
|
* We also need this memory barrier (wmb) to make certain all of the
|
|
* status bits have been updated before next_to_watch is written.
|
|
*/
|
|
wmb();
|
|
|
|
/* set next_to_watch value indicating a packet is present */
|
|
first->next_to_watch = tx_desc;
|
|
|
|
i++;
|
|
if (i == tx_ring->count)
|
|
i = 0;
|
|
|
|
tx_ring->next_to_use = i;
|
|
|
|
/* notify HW of packet */
|
|
ixgbevf_write_tail(tx_ring, i);
|
|
|
|
return;
|
|
dma_error:
|
|
dev_err(tx_ring->dev, "TX DMA map failed\n");
|
|
tx_buffer = &tx_ring->tx_buffer_info[i];
|
|
|
|
/* clear dma mappings for failed tx_buffer_info map */
|
|
while (tx_buffer != first) {
|
|
if (dma_unmap_len(tx_buffer, len))
|
|
dma_unmap_page(tx_ring->dev,
|
|
dma_unmap_addr(tx_buffer, dma),
|
|
dma_unmap_len(tx_buffer, len),
|
|
DMA_TO_DEVICE);
|
|
dma_unmap_len_set(tx_buffer, len, 0);
|
|
|
|
if (i-- == 0)
|
|
i += tx_ring->count;
|
|
tx_buffer = &tx_ring->tx_buffer_info[i];
|
|
}
|
|
|
|
if (dma_unmap_len(tx_buffer, len))
|
|
dma_unmap_single(tx_ring->dev,
|
|
dma_unmap_addr(tx_buffer, dma),
|
|
dma_unmap_len(tx_buffer, len),
|
|
DMA_TO_DEVICE);
|
|
dma_unmap_len_set(tx_buffer, len, 0);
|
|
|
|
dev_kfree_skb_any(tx_buffer->skb);
|
|
tx_buffer->skb = NULL;
|
|
|
|
tx_ring->next_to_use = i;
|
|
}
|
|
|
|
static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
|
|
{
|
|
netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
|
|
/* 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(ixgbevf_desc_unused(tx_ring) < size))
|
|
return -EBUSY;
|
|
|
|
/* A reprieve! - use start_queue because it doesn't call schedule */
|
|
netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
|
|
++tx_ring->tx_stats.restart_queue;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
|
|
{
|
|
if (likely(ixgbevf_desc_unused(tx_ring) >= size))
|
|
return 0;
|
|
return __ixgbevf_maybe_stop_tx(tx_ring, size);
|
|
}
|
|
|
|
static int ixgbevf_xmit_frame_ring(struct sk_buff *skb,
|
|
struct ixgbevf_ring *tx_ring)
|
|
{
|
|
struct ixgbevf_tx_buffer *first;
|
|
int tso;
|
|
u32 tx_flags = 0;
|
|
u16 count = TXD_USE_COUNT(skb_headlen(skb));
|
|
#if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
|
|
unsigned short f;
|
|
#endif
|
|
u8 hdr_len = 0;
|
|
u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);
|
|
|
|
if (!dst_mac || is_link_local_ether_addr(dst_mac)) {
|
|
dev_kfree_skb_any(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
|
|
* + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
|
|
* + 2 desc gap to keep tail from touching head,
|
|
* + 1 desc for context descriptor,
|
|
* otherwise try next time
|
|
*/
|
|
#if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
|
|
for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
|
|
count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
|
|
#else
|
|
count += skb_shinfo(skb)->nr_frags;
|
|
#endif
|
|
if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
|
|
tx_ring->tx_stats.tx_busy++;
|
|
return NETDEV_TX_BUSY;
|
|
}
|
|
|
|
/* record the location of the first descriptor for this packet */
|
|
first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
|
|
first->skb = skb;
|
|
first->bytecount = skb->len;
|
|
first->gso_segs = 1;
|
|
|
|
if (skb_vlan_tag_present(skb)) {
|
|
tx_flags |= skb_vlan_tag_get(skb);
|
|
tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
|
|
tx_flags |= IXGBE_TX_FLAGS_VLAN;
|
|
}
|
|
|
|
/* record initial flags and protocol */
|
|
first->tx_flags = tx_flags;
|
|
first->protocol = vlan_get_protocol(skb);
|
|
|
|
tso = ixgbevf_tso(tx_ring, first, &hdr_len);
|
|
if (tso < 0)
|
|
goto out_drop;
|
|
else if (!tso)
|
|
ixgbevf_tx_csum(tx_ring, first);
|
|
|
|
ixgbevf_tx_map(tx_ring, first, hdr_len);
|
|
|
|
ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
out_drop:
|
|
dev_kfree_skb_any(first->skb);
|
|
first->skb = NULL;
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
static netdev_tx_t ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
|
|
{
|
|
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
|
|
struct ixgbevf_ring *tx_ring;
|
|
|
|
if (skb->len <= 0) {
|
|
dev_kfree_skb_any(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* The minimum packet size for olinfo paylen is 17 so pad the skb
|
|
* in order to meet this minimum size requirement.
|
|
*/
|
|
if (skb->len < 17) {
|
|
if (skb_padto(skb, 17))
|
|
return NETDEV_TX_OK;
|
|
skb->len = 17;
|
|
}
|
|
|
|
tx_ring = adapter->tx_ring[skb->queue_mapping];
|
|
return ixgbevf_xmit_frame_ring(skb, tx_ring);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_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 ixgbevf_set_mac(struct net_device *netdev, void *p)
|
|
{
|
|
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
struct sockaddr *addr = p;
|
|
int err;
|
|
|
|
if (!is_valid_ether_addr(addr->sa_data))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
spin_lock_bh(&adapter->mbx_lock);
|
|
|
|
err = hw->mac.ops.set_rar(hw, 0, addr->sa_data, 0);
|
|
|
|
spin_unlock_bh(&adapter->mbx_lock);
|
|
|
|
if (err)
|
|
return -EPERM;
|
|
|
|
ether_addr_copy(hw->mac.addr, addr->sa_data);
|
|
ether_addr_copy(hw->mac.perm_addr, addr->sa_data);
|
|
ether_addr_copy(netdev->dev_addr, addr->sa_data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_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 ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
|
|
{
|
|
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
|
|
struct ixgbe_hw *hw = &adapter->hw;
|
|
int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
|
|
int ret;
|
|
|
|
/* prevent MTU being changed to a size unsupported by XDP */
|
|
if (adapter->xdp_prog) {
|
|
dev_warn(&adapter->pdev->dev, "MTU cannot be changed while XDP program is loaded\n");
|
|
return -EPERM;
|
|
}
|
|
|
|
spin_lock_bh(&adapter->mbx_lock);
|
|
/* notify the PF of our intent to use this size of frame */
|
|
ret = hw->mac.ops.set_rlpml(hw, max_frame);
|
|
spin_unlock_bh(&adapter->mbx_lock);
|
|
if (ret)
|
|
return -EINVAL;
|
|
|
|
hw_dbg(hw, "changing MTU from %d to %d\n",
|
|
netdev->mtu, new_mtu);
|
|
|
|
/* must set new MTU before calling down or up */
|
|
netdev->mtu = new_mtu;
|
|
|
|
if (netif_running(netdev))
|
|
ixgbevf_reinit_locked(adapter);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ixgbevf_suspend(struct pci_dev *pdev, pm_message_t state)
|
|
{
|
|
struct net_device *netdev = pci_get_drvdata(pdev);
|
|
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
|
|
#ifdef CONFIG_PM
|
|
int retval = 0;
|
|
#endif
|
|
|
|
rtnl_lock();
|
|
netif_device_detach(netdev);
|
|
|
|
if (netif_running(netdev))
|
|
ixgbevf_close_suspend(adapter);
|
|
|
|
ixgbevf_clear_interrupt_scheme(adapter);
|
|
rtnl_unlock();
|
|
|
|
#ifdef CONFIG_PM
|
|
retval = pci_save_state(pdev);
|
|
if (retval)
|
|
return retval;
|
|
|
|
#endif
|
|
if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
|
|
pci_disable_device(pdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int ixgbevf_resume(struct pci_dev *pdev)
|
|
{
|
|
struct net_device *netdev = pci_get_drvdata(pdev);
|
|
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
|
|
u32 err;
|
|
|
|
pci_restore_state(pdev);
|
|
/* pci_restore_state clears dev->state_saved so call
|
|
* pci_save_state to restore it.
|
|
*/
|
|
pci_save_state(pdev);
|
|
|
|
err = pci_enable_device_mem(pdev);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
|
|
return err;
|
|
}
|
|
|
|
adapter->hw.hw_addr = adapter->io_addr;
|
|
smp_mb__before_atomic();
|
|
clear_bit(__IXGBEVF_DISABLED, &adapter->state);
|
|
pci_set_master(pdev);
|
|
|
|
ixgbevf_reset(adapter);
|
|
|
|
rtnl_lock();
|
|
err = ixgbevf_init_interrupt_scheme(adapter);
|
|
if (!err && netif_running(netdev))
|
|
err = ixgbevf_open(netdev);
|
|
rtnl_unlock();
|
|
if (err)
|
|
return err;
|
|
|
|
netif_device_attach(netdev);
|
|
|
|
return err;
|
|
}
|
|
|
|
#endif /* CONFIG_PM */
|
|
static void ixgbevf_shutdown(struct pci_dev *pdev)
|
|
{
|
|
ixgbevf_suspend(pdev, PMSG_SUSPEND);
|
|
}
|
|
|
|
static void ixgbevf_get_tx_ring_stats(struct rtnl_link_stats64 *stats,
|
|
const struct ixgbevf_ring *ring)
|
|
{
|
|
u64 bytes, packets;
|
|
unsigned int start;
|
|
|
|
if (ring) {
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&ring->syncp);
|
|
bytes = ring->stats.bytes;
|
|
packets = ring->stats.packets;
|
|
} while (u64_stats_fetch_retry_irq(&ring->syncp, start));
|
|
stats->tx_bytes += bytes;
|
|
stats->tx_packets += packets;
|
|
}
|
|
}
|
|
|
|
static void ixgbevf_get_stats(struct net_device *netdev,
|
|
struct rtnl_link_stats64 *stats)
|
|
{
|
|
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
|
|
unsigned int start;
|
|
u64 bytes, packets;
|
|
const struct ixgbevf_ring *ring;
|
|
int i;
|
|
|
|
ixgbevf_update_stats(adapter);
|
|
|
|
stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
|
|
|
|
rcu_read_lock();
|
|
for (i = 0; i < adapter->num_rx_queues; i++) {
|
|
ring = adapter->rx_ring[i];
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&ring->syncp);
|
|
bytes = ring->stats.bytes;
|
|
packets = ring->stats.packets;
|
|
} while (u64_stats_fetch_retry_irq(&ring->syncp, start));
|
|
stats->rx_bytes += bytes;
|
|
stats->rx_packets += packets;
|
|
}
|
|
|
|
for (i = 0; i < adapter->num_tx_queues; i++) {
|
|
ring = adapter->tx_ring[i];
|
|
ixgbevf_get_tx_ring_stats(stats, ring);
|
|
}
|
|
|
|
for (i = 0; i < adapter->num_xdp_queues; i++) {
|
|
ring = adapter->xdp_ring[i];
|
|
ixgbevf_get_tx_ring_stats(stats, ring);
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
#define IXGBEVF_MAX_MAC_HDR_LEN 127
|
|
#define IXGBEVF_MAX_NETWORK_HDR_LEN 511
|
|
|
|
static netdev_features_t
|
|
ixgbevf_features_check(struct sk_buff *skb, struct net_device *dev,
|
|
netdev_features_t features)
|
|
{
|
|
unsigned int network_hdr_len, mac_hdr_len;
|
|
|
|
/* Make certain the headers can be described by a context descriptor */
|
|
mac_hdr_len = skb_network_header(skb) - skb->data;
|
|
if (unlikely(mac_hdr_len > IXGBEVF_MAX_MAC_HDR_LEN))
|
|
return features & ~(NETIF_F_HW_CSUM |
|
|
NETIF_F_SCTP_CRC |
|
|
NETIF_F_HW_VLAN_CTAG_TX |
|
|
NETIF_F_TSO |
|
|
NETIF_F_TSO6);
|
|
|
|
network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
|
|
if (unlikely(network_hdr_len > IXGBEVF_MAX_NETWORK_HDR_LEN))
|
|
return features & ~(NETIF_F_HW_CSUM |
|
|
NETIF_F_SCTP_CRC |
|
|
NETIF_F_TSO |
|
|
NETIF_F_TSO6);
|
|
|
|
/* We can only support IPV4 TSO in tunnels if we can mangle the
|
|
* inner IP ID field, so strip TSO if MANGLEID is not supported.
|
|
*/
|
|
if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
|
|
features &= ~NETIF_F_TSO;
|
|
|
|
return features;
|
|
}
|
|
|
|
static int ixgbevf_xdp_setup(struct net_device *dev, struct bpf_prog *prog)
|
|
{
|
|
int i, frame_size = dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
|
|
struct ixgbevf_adapter *adapter = netdev_priv(dev);
|
|
struct bpf_prog *old_prog;
|
|
|
|
/* verify ixgbevf ring attributes are sufficient for XDP */
|
|
for (i = 0; i < adapter->num_rx_queues; i++) {
|
|
struct ixgbevf_ring *ring = adapter->rx_ring[i];
|
|
|
|
if (frame_size > ixgbevf_rx_bufsz(ring))
|
|
return -EINVAL;
|
|
}
|
|
|
|
old_prog = xchg(&adapter->xdp_prog, prog);
|
|
|
|
/* If transitioning XDP modes reconfigure rings */
|
|
if (!!prog != !!old_prog) {
|
|
/* Hardware has to reinitialize queues and interrupts to
|
|
* match packet buffer alignment. Unfortunately, the
|
|
* hardware is not flexible enough to do this dynamically.
|
|
*/
|
|
if (netif_running(dev))
|
|
ixgbevf_close(dev);
|
|
|
|
ixgbevf_clear_interrupt_scheme(adapter);
|
|
ixgbevf_init_interrupt_scheme(adapter);
|
|
|
|
if (netif_running(dev))
|
|
ixgbevf_open(dev);
|
|
} else {
|
|
for (i = 0; i < adapter->num_rx_queues; i++)
|
|
xchg(&adapter->rx_ring[i]->xdp_prog, adapter->xdp_prog);
|
|
}
|
|
|
|
if (old_prog)
|
|
bpf_prog_put(old_prog);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ixgbevf_xdp(struct net_device *dev, struct netdev_bpf *xdp)
|
|
{
|
|
struct ixgbevf_adapter *adapter = netdev_priv(dev);
|
|
|
|
switch (xdp->command) {
|
|
case XDP_SETUP_PROG:
|
|
return ixgbevf_xdp_setup(dev, xdp->prog);
|
|
case XDP_QUERY_PROG:
|
|
xdp->prog_id = adapter->xdp_prog ?
|
|
adapter->xdp_prog->aux->id : 0;
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static const struct net_device_ops ixgbevf_netdev_ops = {
|
|
.ndo_open = ixgbevf_open,
|
|
.ndo_stop = ixgbevf_close,
|
|
.ndo_start_xmit = ixgbevf_xmit_frame,
|
|
.ndo_set_rx_mode = ixgbevf_set_rx_mode,
|
|
.ndo_get_stats64 = ixgbevf_get_stats,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
.ndo_set_mac_address = ixgbevf_set_mac,
|
|
.ndo_change_mtu = ixgbevf_change_mtu,
|
|
.ndo_tx_timeout = ixgbevf_tx_timeout,
|
|
.ndo_vlan_rx_add_vid = ixgbevf_vlan_rx_add_vid,
|
|
.ndo_vlan_rx_kill_vid = ixgbevf_vlan_rx_kill_vid,
|
|
.ndo_features_check = ixgbevf_features_check,
|
|
.ndo_bpf = ixgbevf_xdp,
|
|
};
|
|
|
|
static void ixgbevf_assign_netdev_ops(struct net_device *dev)
|
|
{
|
|
dev->netdev_ops = &ixgbevf_netdev_ops;
|
|
ixgbevf_set_ethtool_ops(dev);
|
|
dev->watchdog_timeo = 5 * HZ;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_probe - Device Initialization Routine
|
|
* @pdev: PCI device information struct
|
|
* @ent: entry in ixgbevf_pci_tbl
|
|
*
|
|
* Returns 0 on success, negative on failure
|
|
*
|
|
* ixgbevf_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 ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
|
|
{
|
|
struct net_device *netdev;
|
|
struct ixgbevf_adapter *adapter = NULL;
|
|
struct ixgbe_hw *hw = NULL;
|
|
const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
|
|
int err, pci_using_dac;
|
|
bool disable_dev = false;
|
|
|
|
err = pci_enable_device(pdev);
|
|
if (err)
|
|
return err;
|
|
|
|
if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
|
|
pci_using_dac = 1;
|
|
} else {
|
|
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
|
|
if (err) {
|
|
dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
|
|
goto err_dma;
|
|
}
|
|
pci_using_dac = 0;
|
|
}
|
|
|
|
err = pci_request_regions(pdev, ixgbevf_driver_name);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
|
|
goto err_pci_reg;
|
|
}
|
|
|
|
pci_set_master(pdev);
|
|
|
|
netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
|
|
MAX_TX_QUEUES);
|
|
if (!netdev) {
|
|
err = -ENOMEM;
|
|
goto err_alloc_etherdev;
|
|
}
|
|
|
|
SET_NETDEV_DEV(netdev, &pdev->dev);
|
|
|
|
adapter = netdev_priv(netdev);
|
|
|
|
adapter->netdev = netdev;
|
|
adapter->pdev = pdev;
|
|
hw = &adapter->hw;
|
|
hw->back = adapter;
|
|
adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
|
|
|
|
/* call save state here in standalone driver because it relies on
|
|
* adapter struct to exist, and needs to call netdev_priv
|
|
*/
|
|
pci_save_state(pdev);
|
|
|
|
hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
|
|
pci_resource_len(pdev, 0));
|
|
adapter->io_addr = hw->hw_addr;
|
|
if (!hw->hw_addr) {
|
|
err = -EIO;
|
|
goto err_ioremap;
|
|
}
|
|
|
|
ixgbevf_assign_netdev_ops(netdev);
|
|
|
|
/* Setup HW API */
|
|
memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
|
|
hw->mac.type = ii->mac;
|
|
|
|
memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
|
|
sizeof(struct ixgbe_mbx_operations));
|
|
|
|
/* setup the private structure */
|
|
err = ixgbevf_sw_init(adapter);
|
|
if (err)
|
|
goto err_sw_init;
|
|
|
|
/* The HW MAC address was set and/or determined in sw_init */
|
|
if (!is_valid_ether_addr(netdev->dev_addr)) {
|
|
pr_err("invalid MAC address\n");
|
|
err = -EIO;
|
|
goto err_sw_init;
|
|
}
|
|
|
|
netdev->hw_features = NETIF_F_SG |
|
|
NETIF_F_TSO |
|
|
NETIF_F_TSO6 |
|
|
NETIF_F_RXCSUM |
|
|
NETIF_F_HW_CSUM |
|
|
NETIF_F_SCTP_CRC;
|
|
|
|
#define IXGBEVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
|
|
NETIF_F_GSO_GRE_CSUM | \
|
|
NETIF_F_GSO_IPXIP4 | \
|
|
NETIF_F_GSO_IPXIP6 | \
|
|
NETIF_F_GSO_UDP_TUNNEL | \
|
|
NETIF_F_GSO_UDP_TUNNEL_CSUM)
|
|
|
|
netdev->gso_partial_features = IXGBEVF_GSO_PARTIAL_FEATURES;
|
|
netdev->hw_features |= NETIF_F_GSO_PARTIAL |
|
|
IXGBEVF_GSO_PARTIAL_FEATURES;
|
|
|
|
netdev->features = netdev->hw_features;
|
|
|
|
if (pci_using_dac)
|
|
netdev->features |= NETIF_F_HIGHDMA;
|
|
|
|
netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
|
|
netdev->mpls_features |= NETIF_F_SG |
|
|
NETIF_F_TSO |
|
|
NETIF_F_TSO6 |
|
|
NETIF_F_HW_CSUM;
|
|
netdev->mpls_features |= IXGBEVF_GSO_PARTIAL_FEATURES;
|
|
netdev->hw_enc_features |= netdev->vlan_features;
|
|
|
|
/* set this bit last since it cannot be part of vlan_features */
|
|
netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
|
|
NETIF_F_HW_VLAN_CTAG_RX |
|
|
NETIF_F_HW_VLAN_CTAG_TX;
|
|
|
|
netdev->priv_flags |= IFF_UNICAST_FLT;
|
|
|
|
/* MTU range: 68 - 1504 or 9710 */
|
|
netdev->min_mtu = ETH_MIN_MTU;
|
|
switch (adapter->hw.api_version) {
|
|
case ixgbe_mbox_api_11:
|
|
case ixgbe_mbox_api_12:
|
|
case ixgbe_mbox_api_13:
|
|
netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
|
|
(ETH_HLEN + ETH_FCS_LEN);
|
|
break;
|
|
default:
|
|
if (adapter->hw.mac.type != ixgbe_mac_82599_vf)
|
|
netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
|
|
(ETH_HLEN + ETH_FCS_LEN);
|
|
else
|
|
netdev->max_mtu = ETH_DATA_LEN + ETH_FCS_LEN;
|
|
break;
|
|
}
|
|
|
|
if (IXGBE_REMOVED(hw->hw_addr)) {
|
|
err = -EIO;
|
|
goto err_sw_init;
|
|
}
|
|
|
|
timer_setup(&adapter->service_timer, ixgbevf_service_timer, 0);
|
|
|
|
INIT_WORK(&adapter->service_task, ixgbevf_service_task);
|
|
set_bit(__IXGBEVF_SERVICE_INITED, &adapter->state);
|
|
clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
|
|
|
|
err = ixgbevf_init_interrupt_scheme(adapter);
|
|
if (err)
|
|
goto err_sw_init;
|
|
|
|
strcpy(netdev->name, "eth%d");
|
|
|
|
err = register_netdev(netdev);
|
|
if (err)
|
|
goto err_register;
|
|
|
|
pci_set_drvdata(pdev, netdev);
|
|
netif_carrier_off(netdev);
|
|
|
|
ixgbevf_init_last_counter_stats(adapter);
|
|
|
|
/* print the VF info */
|
|
dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
|
|
dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
|
|
|
|
switch (hw->mac.type) {
|
|
case ixgbe_mac_X550_vf:
|
|
dev_info(&pdev->dev, "Intel(R) X550 Virtual Function\n");
|
|
break;
|
|
case ixgbe_mac_X540_vf:
|
|
dev_info(&pdev->dev, "Intel(R) X540 Virtual Function\n");
|
|
break;
|
|
case ixgbe_mac_82599_vf:
|
|
default:
|
|
dev_info(&pdev->dev, "Intel(R) 82599 Virtual Function\n");
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_register:
|
|
ixgbevf_clear_interrupt_scheme(adapter);
|
|
err_sw_init:
|
|
ixgbevf_reset_interrupt_capability(adapter);
|
|
iounmap(adapter->io_addr);
|
|
kfree(adapter->rss_key);
|
|
err_ioremap:
|
|
disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
|
|
free_netdev(netdev);
|
|
err_alloc_etherdev:
|
|
pci_release_regions(pdev);
|
|
err_pci_reg:
|
|
err_dma:
|
|
if (!adapter || disable_dev)
|
|
pci_disable_device(pdev);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_remove - Device Removal Routine
|
|
* @pdev: PCI device information struct
|
|
*
|
|
* ixgbevf_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 ixgbevf_remove(struct pci_dev *pdev)
|
|
{
|
|
struct net_device *netdev = pci_get_drvdata(pdev);
|
|
struct ixgbevf_adapter *adapter;
|
|
bool disable_dev;
|
|
|
|
if (!netdev)
|
|
return;
|
|
|
|
adapter = netdev_priv(netdev);
|
|
|
|
set_bit(__IXGBEVF_REMOVING, &adapter->state);
|
|
cancel_work_sync(&adapter->service_task);
|
|
|
|
if (netdev->reg_state == NETREG_REGISTERED)
|
|
unregister_netdev(netdev);
|
|
|
|
ixgbevf_clear_interrupt_scheme(adapter);
|
|
ixgbevf_reset_interrupt_capability(adapter);
|
|
|
|
iounmap(adapter->io_addr);
|
|
pci_release_regions(pdev);
|
|
|
|
hw_dbg(&adapter->hw, "Remove complete\n");
|
|
|
|
kfree(adapter->rss_key);
|
|
disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
|
|
free_netdev(netdev);
|
|
|
|
if (disable_dev)
|
|
pci_disable_device(pdev);
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_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 ixgbevf_io_error_detected(struct pci_dev *pdev,
|
|
pci_channel_state_t state)
|
|
{
|
|
struct net_device *netdev = pci_get_drvdata(pdev);
|
|
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
|
|
|
|
if (!test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
|
|
return PCI_ERS_RESULT_DISCONNECT;
|
|
|
|
rtnl_lock();
|
|
netif_device_detach(netdev);
|
|
|
|
if (netif_running(netdev))
|
|
ixgbevf_close_suspend(adapter);
|
|
|
|
if (state == pci_channel_io_perm_failure) {
|
|
rtnl_unlock();
|
|
return PCI_ERS_RESULT_DISCONNECT;
|
|
}
|
|
|
|
if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
|
|
pci_disable_device(pdev);
|
|
rtnl_unlock();
|
|
|
|
/* Request a slot slot reset. */
|
|
return PCI_ERS_RESULT_NEED_RESET;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_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 ixgbevf_resume routine.
|
|
**/
|
|
static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
|
|
{
|
|
struct net_device *netdev = pci_get_drvdata(pdev);
|
|
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
|
|
|
|
if (pci_enable_device_mem(pdev)) {
|
|
dev_err(&pdev->dev,
|
|
"Cannot re-enable PCI device after reset.\n");
|
|
return PCI_ERS_RESULT_DISCONNECT;
|
|
}
|
|
|
|
adapter->hw.hw_addr = adapter->io_addr;
|
|
smp_mb__before_atomic();
|
|
clear_bit(__IXGBEVF_DISABLED, &adapter->state);
|
|
pci_set_master(pdev);
|
|
|
|
ixgbevf_reset(adapter);
|
|
|
|
return PCI_ERS_RESULT_RECOVERED;
|
|
}
|
|
|
|
/**
|
|
* ixgbevf_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 ixgbevf_resume routine.
|
|
**/
|
|
static void ixgbevf_io_resume(struct pci_dev *pdev)
|
|
{
|
|
struct net_device *netdev = pci_get_drvdata(pdev);
|
|
|
|
rtnl_lock();
|
|
if (netif_running(netdev))
|
|
ixgbevf_open(netdev);
|
|
|
|
netif_device_attach(netdev);
|
|
rtnl_unlock();
|
|
}
|
|
|
|
/* PCI Error Recovery (ERS) */
|
|
static const struct pci_error_handlers ixgbevf_err_handler = {
|
|
.error_detected = ixgbevf_io_error_detected,
|
|
.slot_reset = ixgbevf_io_slot_reset,
|
|
.resume = ixgbevf_io_resume,
|
|
};
|
|
|
|
static struct pci_driver ixgbevf_driver = {
|
|
.name = ixgbevf_driver_name,
|
|
.id_table = ixgbevf_pci_tbl,
|
|
.probe = ixgbevf_probe,
|
|
.remove = ixgbevf_remove,
|
|
#ifdef CONFIG_PM
|
|
/* Power Management Hooks */
|
|
.suspend = ixgbevf_suspend,
|
|
.resume = ixgbevf_resume,
|
|
#endif
|
|
.shutdown = ixgbevf_shutdown,
|
|
.err_handler = &ixgbevf_err_handler
|
|
};
|
|
|
|
/**
|
|
* ixgbevf_init_module - Driver Registration Routine
|
|
*
|
|
* ixgbevf_init_module is the first routine called when the driver is
|
|
* loaded. All it does is register with the PCI subsystem.
|
|
**/
|
|
static int __init ixgbevf_init_module(void)
|
|
{
|
|
pr_info("%s - version %s\n", ixgbevf_driver_string,
|
|
ixgbevf_driver_version);
|
|
|
|
pr_info("%s\n", ixgbevf_copyright);
|
|
ixgbevf_wq = create_singlethread_workqueue(ixgbevf_driver_name);
|
|
if (!ixgbevf_wq) {
|
|
pr_err("%s: Failed to create workqueue\n", ixgbevf_driver_name);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return pci_register_driver(&ixgbevf_driver);
|
|
}
|
|
|
|
module_init(ixgbevf_init_module);
|
|
|
|
/**
|
|
* ixgbevf_exit_module - Driver Exit Cleanup Routine
|
|
*
|
|
* ixgbevf_exit_module is called just before the driver is removed
|
|
* from memory.
|
|
**/
|
|
static void __exit ixgbevf_exit_module(void)
|
|
{
|
|
pci_unregister_driver(&ixgbevf_driver);
|
|
if (ixgbevf_wq) {
|
|
destroy_workqueue(ixgbevf_wq);
|
|
ixgbevf_wq = NULL;
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
/**
|
|
* ixgbevf_get_hw_dev_name - return device name string
|
|
* used by hardware layer to print debugging information
|
|
* @hw: pointer to private hardware struct
|
|
**/
|
|
char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
|
|
{
|
|
struct ixgbevf_adapter *adapter = hw->back;
|
|
|
|
return adapter->netdev->name;
|
|
}
|
|
|
|
#endif
|
|
module_exit(ixgbevf_exit_module);
|
|
|
|
/* ixgbevf_main.c */
|