diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 7496 |
1 files changed, 0 insertions, 7496 deletions
diff --git a/ANDROID_3.4.5/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/ANDROID_3.4.5/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c deleted file mode 100644 index a66c2159..00000000 --- a/ANDROID_3.4.5/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ /dev/null @@ -1,7496 +0,0 @@ -/******************************************************************************* - - Intel 10 Gigabit PCI Express Linux driver - Copyright(c) 1999 - 2012 Intel Corporation. - - This program is free software; you can redistribute it and/or modify it - under the terms and conditions of the GNU General Public License, - version 2, as published by the Free Software Foundation. - - This program is distributed in the hope it will be useful, but WITHOUT - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - more details. - - You should have received a copy of the GNU General Public License along with - this program; if not, write to the Free Software Foundation, Inc., - 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - - The full GNU General Public License is included in this distribution in - the file called "COPYING". - - Contact Information: - e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> - Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - -*******************************************************************************/ - -#include <linux/types.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/netdevice.h> -#include <linux/vmalloc.h> -#include <linux/string.h> -#include <linux/in.h> -#include <linux/interrupt.h> -#include <linux/ip.h> -#include <linux/tcp.h> -#include <linux/sctp.h> -#include <linux/pkt_sched.h> -#include <linux/ipv6.h> -#include <linux/slab.h> -#include <net/checksum.h> -#include <net/ip6_checksum.h> -#include <linux/ethtool.h> -#include <linux/if.h> -#include <linux/if_vlan.h> -#include <linux/prefetch.h> -#include <scsi/fc/fc_fcoe.h> - -#include "ixgbe.h" -#include "ixgbe_common.h" -#include "ixgbe_dcb_82599.h" -#include "ixgbe_sriov.h" - -char ixgbe_driver_name[] = "ixgbe"; -static const char ixgbe_driver_string[] = - "Intel(R) 10 Gigabit PCI Express Network Driver"; -#ifdef IXGBE_FCOE -char ixgbe_default_device_descr[] = - "Intel(R) 10 Gigabit Network Connection"; -#else -static char ixgbe_default_device_descr[] = - "Intel(R) 10 Gigabit Network Connection"; -#endif -#define MAJ 3 -#define MIN 8 -#define BUILD 21 -#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \ - __stringify(BUILD) "-k" -const char ixgbe_driver_version[] = DRV_VERSION; -static const char ixgbe_copyright[] = - "Copyright (c) 1999-2012 Intel Corporation."; - -static const struct ixgbe_info *ixgbe_info_tbl[] = { - [board_82598] = &ixgbe_82598_info, - [board_82599] = &ixgbe_82599_info, - [board_X540] = &ixgbe_X540_info, -}; - -/* ixgbe_pci_tbl - PCI Device ID Table - * - * Wildcard entries (PCI_ANY_ID) should come last - * Last entry must be all 0s - * - * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, - * Class, Class Mask, private data (not used) } - */ -static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = { - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598), board_82598 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), board_82598 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), board_82598 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT), board_82598 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2), board_82598 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), board_82598 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), board_82598 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT), board_82598 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM), board_82598 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR), board_82598 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM), board_82598 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX), board_82598 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4), board_82599 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM), board_82599 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR), board_82599 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP), board_82599 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM), board_82599 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ), board_82599 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4), board_82599 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE), board_82599 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE), board_82599 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM), board_82599 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE), board_82599 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T), board_X540 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2), board_82599 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS), board_82599 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599EN_SFP), board_82599 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF_QP), board_82599 }, - /* required last entry */ - {0, } -}; -MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl); - -#ifdef CONFIG_IXGBE_DCA -static int ixgbe_notify_dca(struct notifier_block *, unsigned long event, - void *p); -static struct notifier_block dca_notifier = { - .notifier_call = ixgbe_notify_dca, - .next = NULL, - .priority = 0 -}; -#endif - -#ifdef CONFIG_PCI_IOV -static unsigned int max_vfs; -module_param(max_vfs, uint, 0); -MODULE_PARM_DESC(max_vfs, - "Maximum number of virtual functions to allocate per physical function"); -#endif /* CONFIG_PCI_IOV */ - -static unsigned int allow_unsupported_sfp; -module_param(allow_unsupported_sfp, uint, 0); -MODULE_PARM_DESC(allow_unsupported_sfp, - "Allow unsupported and untested SFP+ modules on 82599-based adapters"); - -#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) -static int debug = -1; -module_param(debug, int, 0); -MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); - -MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); -MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver"); -MODULE_LICENSE("GPL"); -MODULE_VERSION(DRV_VERSION); - -static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter) -{ - if (!test_bit(__IXGBE_DOWN, &adapter->state) && - !test_and_set_bit(__IXGBE_SERVICE_SCHED, &adapter->state)) - schedule_work(&adapter->service_task); -} - -static void ixgbe_service_event_complete(struct ixgbe_adapter *adapter) -{ - BUG_ON(!test_bit(__IXGBE_SERVICE_SCHED, &adapter->state)); - - /* flush memory to make sure state is correct before next watchdog */ - smp_mb__before_clear_bit(); - clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state); -} - -struct ixgbe_reg_info { - u32 ofs; - char *name; -}; - -static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = { - - /* General Registers */ - {IXGBE_CTRL, "CTRL"}, - {IXGBE_STATUS, "STATUS"}, - {IXGBE_CTRL_EXT, "CTRL_EXT"}, - - /* Interrupt Registers */ - {IXGBE_EICR, "EICR"}, - - /* RX Registers */ - {IXGBE_SRRCTL(0), "SRRCTL"}, - {IXGBE_DCA_RXCTRL(0), "DRXCTL"}, - {IXGBE_RDLEN(0), "RDLEN"}, - {IXGBE_RDH(0), "RDH"}, - {IXGBE_RDT(0), "RDT"}, - {IXGBE_RXDCTL(0), "RXDCTL"}, - {IXGBE_RDBAL(0), "RDBAL"}, - {IXGBE_RDBAH(0), "RDBAH"}, - - /* TX Registers */ - {IXGBE_TDBAL(0), "TDBAL"}, - {IXGBE_TDBAH(0), "TDBAH"}, - {IXGBE_TDLEN(0), "TDLEN"}, - {IXGBE_TDH(0), "TDH"}, - {IXGBE_TDT(0), "TDT"}, - {IXGBE_TXDCTL(0), "TXDCTL"}, - - /* List Terminator */ - {} -}; - - -/* - * ixgbe_regdump - register printout routine - */ -static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo) -{ - int i = 0, j = 0; - char rname[16]; - u32 regs[64]; - - switch (reginfo->ofs) { - case IXGBE_SRRCTL(0): - for (i = 0; i < 64; i++) - regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i)); - break; - case IXGBE_DCA_RXCTRL(0): - for (i = 0; i < 64; i++) - regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i)); - break; - case IXGBE_RDLEN(0): - for (i = 0; i < 64; i++) - regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i)); - break; - case IXGBE_RDH(0): - for (i = 0; i < 64; i++) - regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i)); - break; - case IXGBE_RDT(0): - for (i = 0; i < 64; i++) - regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i)); - break; - case IXGBE_RXDCTL(0): - for (i = 0; i < 64; i++) - regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i)); - break; - case IXGBE_RDBAL(0): - for (i = 0; i < 64; i++) - regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i)); - break; - case IXGBE_RDBAH(0): - for (i = 0; i < 64; i++) - regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i)); - break; - case IXGBE_TDBAL(0): - for (i = 0; i < 64; i++) - regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i)); - break; - case IXGBE_TDBAH(0): - for (i = 0; i < 64; i++) - regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i)); - break; - case IXGBE_TDLEN(0): - for (i = 0; i < 64; i++) - regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i)); - break; - case IXGBE_TDH(0): - for (i = 0; i < 64; i++) - regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i)); - break; - case IXGBE_TDT(0): - for (i = 0; i < 64; i++) - regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i)); - break; - case IXGBE_TXDCTL(0): - for (i = 0; i < 64; i++) - regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i)); - break; - default: - pr_info("%-15s %08x\n", reginfo->name, - IXGBE_READ_REG(hw, reginfo->ofs)); - return; - } - - for (i = 0; i < 8; i++) { - snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7); - pr_err("%-15s", rname); - for (j = 0; j < 8; j++) - pr_cont(" %08x", regs[i*8+j]); - pr_cont("\n"); - } - -} - -/* - * ixgbe_dump - Print registers, tx-rings and rx-rings - */ -static void ixgbe_dump(struct ixgbe_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - struct ixgbe_hw *hw = &adapter->hw; - struct ixgbe_reg_info *reginfo; - int n = 0; - struct ixgbe_ring *tx_ring; - struct ixgbe_tx_buffer *tx_buffer; - union ixgbe_adv_tx_desc *tx_desc; - struct my_u0 { u64 a; u64 b; } *u0; - struct ixgbe_ring *rx_ring; - union ixgbe_adv_rx_desc *rx_desc; - struct ixgbe_rx_buffer *rx_buffer_info; - u32 staterr; - int i = 0; - - if (!netif_msg_hw(adapter)) - return; - - /* Print netdevice Info */ - if (netdev) { - dev_info(&adapter->pdev->dev, "Net device Info\n"); - pr_info("Device Name state " - "trans_start last_rx\n"); - pr_info("%-15s %016lX %016lX %016lX\n", - netdev->name, - netdev->state, - netdev->trans_start, - netdev->last_rx); - } - - /* Print Registers */ - dev_info(&adapter->pdev->dev, "Register Dump\n"); - pr_info(" Register Name Value\n"); - for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl; - reginfo->name; reginfo++) { - ixgbe_regdump(hw, reginfo); - } - - /* Print TX Ring Summary */ - if (!netdev || !netif_running(netdev)) - goto exit; - - dev_info(&adapter->pdev->dev, "TX Rings Summary\n"); - pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n"); - for (n = 0; n < adapter->num_tx_queues; n++) { - tx_ring = adapter->tx_ring[n]; - tx_buffer = &tx_ring->tx_buffer_info[tx_ring->next_to_clean]; - pr_info(" %5d %5X %5X %016llX %04X %p %016llX\n", - n, tx_ring->next_to_use, tx_ring->next_to_clean, - (u64)dma_unmap_addr(tx_buffer, dma), - dma_unmap_len(tx_buffer, len), - tx_buffer->next_to_watch, - (u64)tx_buffer->time_stamp); - } - - /* Print TX Rings */ - if (!netif_msg_tx_done(adapter)) - goto rx_ring_summary; - - dev_info(&adapter->pdev->dev, "TX Rings Dump\n"); - - /* Transmit Descriptor Formats - * - * Advanced Transmit Descriptor - * +--------------------------------------------------------------+ - * 0 | Buffer Address [63:0] | - * +--------------------------------------------------------------+ - * 8 | PAYLEN | PORTS | IDX | STA | DCMD |DTYP | RSV | DTALEN | - * +--------------------------------------------------------------+ - * 63 46 45 40 39 36 35 32 31 24 23 20 19 0 - */ - - for (n = 0; n < adapter->num_tx_queues; n++) { - tx_ring = adapter->tx_ring[n]; - pr_info("------------------------------------\n"); - pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index); - pr_info("------------------------------------\n"); - pr_info("T [desc] [address 63:0 ] " - "[PlPOIdStDDt Ln] [bi->dma ] " - "leng ntw timestamp bi->skb\n"); - - for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) { - tx_desc = IXGBE_TX_DESC(tx_ring, i); - tx_buffer = &tx_ring->tx_buffer_info[i]; - u0 = (struct my_u0 *)tx_desc; - pr_info("T [0x%03X] %016llX %016llX %016llX" - " %04X %p %016llX %p", i, - le64_to_cpu(u0->a), - le64_to_cpu(u0->b), - (u64)dma_unmap_addr(tx_buffer, dma), - dma_unmap_len(tx_buffer, len), - tx_buffer->next_to_watch, - (u64)tx_buffer->time_stamp, - tx_buffer->skb); - if (i == tx_ring->next_to_use && - i == tx_ring->next_to_clean) - pr_cont(" NTC/U\n"); - else if (i == tx_ring->next_to_use) - pr_cont(" NTU\n"); - else if (i == tx_ring->next_to_clean) - pr_cont(" NTC\n"); - else - pr_cont("\n"); - - if (netif_msg_pktdata(adapter) && - dma_unmap_len(tx_buffer, len) != 0) - print_hex_dump(KERN_INFO, "", - DUMP_PREFIX_ADDRESS, 16, 1, - phys_to_virt(dma_unmap_addr(tx_buffer, - dma)), - dma_unmap_len(tx_buffer, len), - true); - } - } - - /* Print RX Rings Summary */ -rx_ring_summary: - dev_info(&adapter->pdev->dev, "RX Rings Summary\n"); - pr_info("Queue [NTU] [NTC]\n"); - for (n = 0; n < adapter->num_rx_queues; n++) { - rx_ring = adapter->rx_ring[n]; - pr_info("%5d %5X %5X\n", - n, rx_ring->next_to_use, rx_ring->next_to_clean); - } - - /* Print RX Rings */ - if (!netif_msg_rx_status(adapter)) - goto exit; - - dev_info(&adapter->pdev->dev, "RX Rings Dump\n"); - - /* Advanced Receive Descriptor (Read) Format - * 63 1 0 - * +-----------------------------------------------------+ - * 0 | Packet Buffer Address [63:1] |A0/NSE| - * +----------------------------------------------+------+ - * 8 | Header Buffer Address [63:1] | DD | - * +-----------------------------------------------------+ - * - * - * Advanced Receive Descriptor (Write-Back) Format - * - * 63 48 47 32 31 30 21 20 16 15 4 3 0 - * +------------------------------------------------------+ - * 0 | Packet IP |SPH| HDR_LEN | RSV|Packet| RSS | - * | Checksum Ident | | | | Type | Type | - * +------------------------------------------------------+ - * 8 | VLAN Tag | Length | Extended Error | Extended Status | - * +------------------------------------------------------+ - * 63 48 47 32 31 20 19 0 - */ - for (n = 0; n < adapter->num_rx_queues; n++) { - rx_ring = adapter->rx_ring[n]; - pr_info("------------------------------------\n"); - pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index); - pr_info("------------------------------------\n"); - pr_info("R [desc] [ PktBuf A0] " - "[ HeadBuf DD] [bi->dma ] [bi->skb] " - "<-- Adv Rx Read format\n"); - pr_info("RWB[desc] [PcsmIpSHl PtRs] " - "[vl er S cks ln] ---------------- [bi->skb] " - "<-- Adv Rx Write-Back format\n"); - - for (i = 0; i < rx_ring->count; i++) { - rx_buffer_info = &rx_ring->rx_buffer_info[i]; - rx_desc = IXGBE_RX_DESC(rx_ring, i); - u0 = (struct my_u0 *)rx_desc; - staterr = le32_to_cpu(rx_desc->wb.upper.status_error); - if (staterr & IXGBE_RXD_STAT_DD) { - /* Descriptor Done */ - pr_info("RWB[0x%03X] %016llX " - "%016llX ---------------- %p", i, - le64_to_cpu(u0->a), - le64_to_cpu(u0->b), - rx_buffer_info->skb); - } else { - pr_info("R [0x%03X] %016llX " - "%016llX %016llX %p", i, - le64_to_cpu(u0->a), - le64_to_cpu(u0->b), - (u64)rx_buffer_info->dma, - rx_buffer_info->skb); - - if (netif_msg_pktdata(adapter)) { - print_hex_dump(KERN_INFO, "", - DUMP_PREFIX_ADDRESS, 16, 1, - phys_to_virt(rx_buffer_info->dma), - ixgbe_rx_bufsz(rx_ring), true); - } - } - - if (i == rx_ring->next_to_use) - pr_cont(" NTU\n"); - else if (i == rx_ring->next_to_clean) - pr_cont(" NTC\n"); - else - pr_cont("\n"); - - } - } - -exit: - return; -} - -static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter) -{ - u32 ctrl_ext; - - /* Let firmware take over control of h/w */ - ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT, - ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD); -} - -static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter) -{ - u32 ctrl_ext; - - /* Let firmware know the driver has taken over */ - ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT, - ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD); -} - -/* - * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors - * @adapter: pointer to adapter struct - * @direction: 0 for Rx, 1 for Tx, -1 for other causes - * @queue: queue to map the corresponding interrupt to - * @msix_vector: the vector to map to the corresponding queue - * - */ -static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction, - u8 queue, u8 msix_vector) -{ - u32 ivar, index; - struct ixgbe_hw *hw = &adapter->hw; - switch (hw->mac.type) { - case ixgbe_mac_82598EB: - msix_vector |= IXGBE_IVAR_ALLOC_VAL; - if (direction == -1) - direction = 0; - index = (((direction * 64) + queue) >> 2) & 0x1F; - ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index)); - ivar &= ~(0xFF << (8 * (queue & 0x3))); - ivar |= (msix_vector << (8 * (queue & 0x3))); - IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar); - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - if (direction == -1) { - /* other causes */ - msix_vector |= IXGBE_IVAR_ALLOC_VAL; - index = ((queue & 1) * 8); - ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC); - ivar &= ~(0xFF << index); - ivar |= (msix_vector << index); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar); - break; - } else { - /* tx or rx causes */ - msix_vector |= IXGBE_IVAR_ALLOC_VAL; - index = ((16 * (queue & 1)) + (8 * direction)); - ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1)); - ivar &= ~(0xFF << index); - ivar |= (msix_vector << index); - IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar); - break; - } - default: - break; - } -} - -static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter, - u64 qmask) -{ - u32 mask; - - switch (adapter->hw.mac.type) { - case ixgbe_mac_82598EB: - mask = (IXGBE_EIMS_RTX_QUEUE & qmask); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask); - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - mask = (qmask & 0xFFFFFFFF); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask); - mask = (qmask >> 32); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask); - break; - default: - break; - } -} - -void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *ring, - struct ixgbe_tx_buffer *tx_buffer) -{ - if (tx_buffer->skb) { - dev_kfree_skb_any(tx_buffer->skb); - if (dma_unmap_len(tx_buffer, len)) - dma_unmap_single(ring->dev, - dma_unmap_addr(tx_buffer, dma), - dma_unmap_len(tx_buffer, len), - DMA_TO_DEVICE); - } else if (dma_unmap_len(tx_buffer, len)) { - dma_unmap_page(ring->dev, - dma_unmap_addr(tx_buffer, dma), - dma_unmap_len(tx_buffer, len), - DMA_TO_DEVICE); - } - tx_buffer->next_to_watch = NULL; - tx_buffer->skb = NULL; - dma_unmap_len_set(tx_buffer, len, 0); - /* tx_buffer must be completely set up in the transmit path */ -} - -static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - struct ixgbe_hw_stats *hwstats = &adapter->stats; - u32 data = 0; - u32 xoff[8] = {0}; - int i; - - if ((hw->fc.current_mode == ixgbe_fc_full) || - (hw->fc.current_mode == ixgbe_fc_rx_pause)) { - switch (hw->mac.type) { - case ixgbe_mac_82598EB: - data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC); - break; - default: - data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT); - } - hwstats->lxoffrxc += data; - - /* refill credits (no tx hang) if we received xoff */ - if (!data) - return; - - for (i = 0; i < adapter->num_tx_queues; i++) - clear_bit(__IXGBE_HANG_CHECK_ARMED, - &adapter->tx_ring[i]->state); - return; - } else if (!(adapter->dcb_cfg.pfc_mode_enable)) - return; - - /* update stats for each tc, only valid with PFC enabled */ - for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) { - switch (hw->mac.type) { - case ixgbe_mac_82598EB: - xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i)); - break; - default: - xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i)); - } - hwstats->pxoffrxc[i] += xoff[i]; - } - - /* disarm tx queues that have received xoff frames */ - for (i = 0; i < adapter->num_tx_queues; i++) { - struct ixgbe_ring *tx_ring = adapter->tx_ring[i]; - u8 tc = tx_ring->dcb_tc; - - if (xoff[tc]) - clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state); - } -} - -static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring) -{ - return ring->stats.packets; -} - -static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring) -{ - struct ixgbe_adapter *adapter = netdev_priv(ring->netdev); - struct ixgbe_hw *hw = &adapter->hw; - - u32 head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx)); - u32 tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx)); - - if (head != tail) - return (head < tail) ? - tail - head : (tail + ring->count - head); - - return 0; -} - -static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring) -{ - u32 tx_done = ixgbe_get_tx_completed(tx_ring); - u32 tx_done_old = tx_ring->tx_stats.tx_done_old; - u32 tx_pending = ixgbe_get_tx_pending(tx_ring); - bool ret = false; - - clear_check_for_tx_hang(tx_ring); - - /* - * Check for a hung queue, but be thorough. This verifies - * that a transmit has been completed since the previous - * check AND there is at least one packet pending. The - * ARMED bit is set to indicate a potential hang. The - * bit is cleared if a pause frame is received to remove - * false hang detection due to PFC or 802.3x frames. By - * requiring this to fail twice we avoid races with - * pfc clearing the ARMED bit and conditions where we - * run the check_tx_hang logic with a transmit completion - * pending but without time to complete it yet. - */ - if ((tx_done_old == tx_done) && tx_pending) { - /* make sure it is true for two checks in a row */ - ret = test_and_set_bit(__IXGBE_HANG_CHECK_ARMED, - &tx_ring->state); - } else { - /* update completed stats and continue */ - tx_ring->tx_stats.tx_done_old = tx_done; - /* reset the countdown */ - clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state); - } - - return ret; -} - -/** - * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout - * @adapter: driver private struct - **/ -static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter) -{ - - /* Do the reset outside of interrupt context */ - if (!test_bit(__IXGBE_DOWN, &adapter->state)) { - adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED; - ixgbe_service_event_schedule(adapter); - } -} - -/** - * ixgbe_clean_tx_irq - Reclaim resources after transmit completes - * @q_vector: structure containing interrupt and ring information - * @tx_ring: tx ring to clean - **/ -static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector, - struct ixgbe_ring *tx_ring) -{ - struct ixgbe_adapter *adapter = q_vector->adapter; - struct ixgbe_tx_buffer *tx_buffer; - union ixgbe_adv_tx_desc *tx_desc; - unsigned int total_bytes = 0, total_packets = 0; - unsigned int budget = q_vector->tx.work_limit; - unsigned int i = tx_ring->next_to_clean; - - if (test_bit(__IXGBE_DOWN, &adapter->state)) - return true; - - tx_buffer = &tx_ring->tx_buffer_info[i]; - tx_desc = IXGBE_TX_DESC(tx_ring, i); - i -= tx_ring->count; - - do { - union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch; - - /* if next_to_watch is not set then there is no work pending */ - if (!eop_desc) - break; - - /* prevent any other reads prior to eop_desc */ - rmb(); - - /* if DD is not set pending work has not been completed */ - if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD))) - break; - - /* clear next_to_watch to prevent false hangs */ - tx_buffer->next_to_watch = NULL; - - /* update the statistics for this packet */ - total_bytes += tx_buffer->bytecount; - total_packets += tx_buffer->gso_segs; - - /* free the skb */ - 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); - - /* clear tx_buffer data */ - tx_buffer->skb = NULL; - dma_unmap_len_set(tx_buffer, len, 0); - - /* unmap remaining buffers */ - while (tx_desc != eop_desc) { - tx_buffer++; - tx_desc++; - i++; - if (unlikely(!i)) { - i -= tx_ring->count; - tx_buffer = tx_ring->tx_buffer_info; - tx_desc = IXGBE_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); - dma_unmap_len_set(tx_buffer, len, 0); - } - } - - /* move us one more past the eop_desc for start of next pkt */ - tx_buffer++; - tx_desc++; - i++; - if (unlikely(!i)) { - i -= tx_ring->count; - tx_buffer = tx_ring->tx_buffer_info; - tx_desc = IXGBE_TX_DESC(tx_ring, 0); - } - - /* issue prefetch for next Tx descriptor */ - prefetch(tx_desc); - - /* update budget accounting */ - budget--; - } while (likely(budget)); - - i += tx_ring->count; - tx_ring->next_to_clean = i; - u64_stats_update_begin(&tx_ring->syncp); - tx_ring->stats.bytes += total_bytes; - tx_ring->stats.packets += total_packets; - u64_stats_update_end(&tx_ring->syncp); - q_vector->tx.total_bytes += total_bytes; - q_vector->tx.total_packets += total_packets; - - if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) { - /* schedule immediate reset if we believe we hung */ - struct ixgbe_hw *hw = &adapter->hw; - e_err(drv, "Detected Tx Unit Hang\n" - " Tx Queue <%d>\n" - " TDH, TDT <%x>, <%x>\n" - " next_to_use <%x>\n" - " next_to_clean <%x>\n" - "tx_buffer_info[next_to_clean]\n" - " time_stamp <%lx>\n" - " jiffies <%lx>\n", - tx_ring->queue_index, - IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)), - IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)), - tx_ring->next_to_use, i, - tx_ring->tx_buffer_info[i].time_stamp, jiffies); - - netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index); - - e_info(probe, - "tx hang %d detected on queue %d, resetting adapter\n", - adapter->tx_timeout_count + 1, tx_ring->queue_index); - - /* schedule immediate reset if we believe we hung */ - ixgbe_tx_timeout_reset(adapter); - - /* the adapter is about to reset, no point in enabling stuff */ - return true; - } - - netdev_tx_completed_queue(txring_txq(tx_ring), - total_packets, total_bytes); - -#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2) - if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) && - (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) { - /* Make sure that anybody stopping the queue after this - * sees the new next_to_clean. - */ - smp_mb(); - if (__netif_subqueue_stopped(tx_ring->netdev, - tx_ring->queue_index) - && !test_bit(__IXGBE_DOWN, &adapter->state)) { - netif_wake_subqueue(tx_ring->netdev, - tx_ring->queue_index); - ++tx_ring->tx_stats.restart_queue; - } - } - - return !!budget; -} - -#ifdef CONFIG_IXGBE_DCA -static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter, - struct ixgbe_ring *tx_ring, - int cpu) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 txctrl = dca3_get_tag(tx_ring->dev, cpu); - u16 reg_offset; - - switch (hw->mac.type) { - case ixgbe_mac_82598EB: - reg_offset = IXGBE_DCA_TXCTRL(tx_ring->reg_idx); - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - reg_offset = IXGBE_DCA_TXCTRL_82599(tx_ring->reg_idx); - txctrl <<= IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599; - break; - default: - /* for unknown hardware do not write register */ - return; - } - - /* - * We can enable relaxed ordering for reads, but not writes when - * DCA is enabled. This is due to a known issue in some chipsets - * which will cause the DCA tag to be cleared. - */ - txctrl |= IXGBE_DCA_TXCTRL_DESC_RRO_EN | - IXGBE_DCA_TXCTRL_DATA_RRO_EN | - IXGBE_DCA_TXCTRL_DESC_DCA_EN; - - IXGBE_WRITE_REG(hw, reg_offset, txctrl); -} - -static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter, - struct ixgbe_ring *rx_ring, - int cpu) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 rxctrl = dca3_get_tag(rx_ring->dev, cpu); - u8 reg_idx = rx_ring->reg_idx; - - - switch (hw->mac.type) { - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - rxctrl <<= IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599; - break; - default: - break; - } - - /* - * We can enable relaxed ordering for reads, but not writes when - * DCA is enabled. This is due to a known issue in some chipsets - * which will cause the DCA tag to be cleared. - */ - rxctrl |= IXGBE_DCA_RXCTRL_DESC_RRO_EN | - IXGBE_DCA_RXCTRL_DATA_DCA_EN | - IXGBE_DCA_RXCTRL_DESC_DCA_EN; - - IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl); -} - -static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector) -{ - struct ixgbe_adapter *adapter = q_vector->adapter; - struct ixgbe_ring *ring; - int cpu = get_cpu(); - - if (q_vector->cpu == cpu) - goto out_no_update; - - ixgbe_for_each_ring(ring, q_vector->tx) - ixgbe_update_tx_dca(adapter, ring, cpu); - - ixgbe_for_each_ring(ring, q_vector->rx) - ixgbe_update_rx_dca(adapter, ring, cpu); - - q_vector->cpu = cpu; -out_no_update: - put_cpu(); -} - -static void ixgbe_setup_dca(struct ixgbe_adapter *adapter) -{ - int num_q_vectors; - int i; - - if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED)) - return; - - /* always use CB2 mode, difference is masked in the CB driver */ - IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2); - - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) - num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - else - num_q_vectors = 1; - - for (i = 0; i < num_q_vectors; i++) { - adapter->q_vector[i]->cpu = -1; - ixgbe_update_dca(adapter->q_vector[i]); - } -} - -static int __ixgbe_notify_dca(struct device *dev, void *data) -{ - struct ixgbe_adapter *adapter = dev_get_drvdata(dev); - unsigned long event = *(unsigned long *)data; - - if (!(adapter->flags & IXGBE_FLAG_DCA_CAPABLE)) - return 0; - - switch (event) { - case DCA_PROVIDER_ADD: - /* if we're already enabled, don't do it again */ - if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) - break; - if (dca_add_requester(dev) == 0) { - adapter->flags |= IXGBE_FLAG_DCA_ENABLED; - ixgbe_setup_dca(adapter); - break; - } - /* Fall Through since DCA is disabled. */ - case DCA_PROVIDER_REMOVE: - if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) { - dca_remove_requester(dev); - adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED; - IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1); - } - break; - } - - return 0; -} - -#endif /* CONFIG_IXGBE_DCA */ -static inline void ixgbe_rx_hash(struct ixgbe_ring *ring, - union ixgbe_adv_rx_desc *rx_desc, - struct sk_buff *skb) -{ - if (ring->netdev->features & NETIF_F_RXHASH) - skb->rxhash = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss); -} - -#ifdef IXGBE_FCOE -/** - * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type - * @ring: structure containing ring specific data - * @rx_desc: advanced rx descriptor - * - * Returns : true if it is FCoE pkt - */ -static inline bool ixgbe_rx_is_fcoe(struct ixgbe_ring *ring, - union ixgbe_adv_rx_desc *rx_desc) -{ - __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info; - - return test_bit(__IXGBE_RX_FCOE, &ring->state) && - ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) == - (cpu_to_le16(IXGBE_ETQF_FILTER_FCOE << - IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT))); -} - -#endif /* IXGBE_FCOE */ -/** - * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum - * @ring: structure containing ring specific data - * @rx_desc: current Rx descriptor being processed - * @skb: skb currently being received and modified - **/ -static inline void ixgbe_rx_checksum(struct ixgbe_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 (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) && - ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) { - ring->rx_stats.csum_err++; - return; - } - - if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS)) - return; - - if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) { - __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info; - - /* - * 82599 errata, UDP frames with a 0 checksum can be marked as - * checksum errors. - */ - if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_UDP)) && - test_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state)) - return; - - ring->rx_stats.csum_err++; - return; - } - - /* It must be a TCP or UDP packet with a valid checksum */ - skb->ip_summed = CHECKSUM_UNNECESSARY; -} - -static inline void ixgbe_release_rx_desc(struct ixgbe_ring *rx_ring, u32 val) -{ - rx_ring->next_to_use = val; - - /* update next to alloc since we have filled the ring */ - rx_ring->next_to_alloc = val; - /* - * Force memory writes to complete before letting h/w - * know there are new descriptors to fetch. (Only - * applicable for weak-ordered memory model archs, - * such as IA-64). - */ - wmb(); - writel(val, rx_ring->tail); -} - -static bool ixgbe_alloc_mapped_page(struct ixgbe_ring *rx_ring, - struct ixgbe_rx_buffer *bi) -{ - struct page *page = bi->page; - dma_addr_t dma = bi->dma; - - /* since we are recycling buffers we should seldom need to alloc */ - if (likely(dma)) - return true; - - /* alloc new page for storage */ - if (likely(!page)) { - page = alloc_pages(GFP_ATOMIC | __GFP_COLD, - ixgbe_rx_pg_order(rx_ring)); - if (unlikely(!page)) { - rx_ring->rx_stats.alloc_rx_page_failed++; - return false; - } - bi->page = page; - } - - /* map page for use */ - dma = dma_map_page(rx_ring->dev, page, 0, - ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE); - - /* - * 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)) { - put_page(page); - bi->page = NULL; - - rx_ring->rx_stats.alloc_rx_page_failed++; - return false; - } - - bi->dma = dma; - bi->page_offset ^= ixgbe_rx_bufsz(rx_ring); - - return true; -} - -/** - * ixgbe_alloc_rx_buffers - Replace used receive buffers - * @rx_ring: ring to place buffers on - * @cleaned_count: number of buffers to replace - **/ -void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count) -{ - union ixgbe_adv_rx_desc *rx_desc; - struct ixgbe_rx_buffer *bi; - u16 i = rx_ring->next_to_use; - - /* nothing to do */ - if (!cleaned_count) - return; - - rx_desc = IXGBE_RX_DESC(rx_ring, i); - bi = &rx_ring->rx_buffer_info[i]; - i -= rx_ring->count; - - do { - if (!ixgbe_alloc_mapped_page(rx_ring, bi)) - break; - - /* - * Refresh the desc even if buffer_addrs 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 = IXGBE_RX_DESC(rx_ring, 0); - bi = rx_ring->rx_buffer_info; - i -= rx_ring->count; - } - - /* clear the hdr_addr for the next_to_use descriptor */ - rx_desc->read.hdr_addr = 0; - - cleaned_count--; - } while (cleaned_count); - - i += rx_ring->count; - - if (rx_ring->next_to_use != i) - ixgbe_release_rx_desc(rx_ring, i); -} - -/** - * ixgbe_get_headlen - determine size of header for RSC/LRO/GRO/FCOE - * @data: pointer to the start of the headers - * @max_len: total length of section to find headers in - * - * This function is meant to determine the length of headers that will - * be recognized by hardware for LRO, GRO, and RSC offloads. The main - * motivation of doing this is to only perform one pull for IPv4 TCP - * packets so that we can do basic things like calculating the gso_size - * based on the average data per packet. - **/ -static unsigned int ixgbe_get_headlen(unsigned char *data, - unsigned int max_len) -{ - union { - unsigned char *network; - /* l2 headers */ - struct ethhdr *eth; - struct vlan_hdr *vlan; - /* l3 headers */ - struct iphdr *ipv4; - } hdr; - __be16 protocol; - u8 nexthdr = 0; /* default to not TCP */ - u8 hlen; - - /* this should never happen, but better safe than sorry */ - if (max_len < ETH_HLEN) - return max_len; - - /* initialize network frame pointer */ - hdr.network = data; - - /* set first protocol and move network header forward */ - protocol = hdr.eth->h_proto; - hdr.network += ETH_HLEN; - - /* handle any vlan tag if present */ - if (protocol == __constant_htons(ETH_P_8021Q)) { - if ((hdr.network - data) > (max_len - VLAN_HLEN)) - return max_len; - - protocol = hdr.vlan->h_vlan_encapsulated_proto; - hdr.network += VLAN_HLEN; - } - - /* handle L3 protocols */ - if (protocol == __constant_htons(ETH_P_IP)) { - if ((hdr.network - data) > (max_len - sizeof(struct iphdr))) - return max_len; - - /* access ihl as a u8 to avoid unaligned access on ia64 */ - hlen = (hdr.network[0] & 0x0F) << 2; - - /* verify hlen meets minimum size requirements */ - if (hlen < sizeof(struct iphdr)) - return hdr.network - data; - - /* record next protocol */ - nexthdr = hdr.ipv4->protocol; - hdr.network += hlen; -#ifdef IXGBE_FCOE - } else if (protocol == __constant_htons(ETH_P_FCOE)) { - if ((hdr.network - data) > (max_len - FCOE_HEADER_LEN)) - return max_len; - hdr.network += FCOE_HEADER_LEN; -#endif - } else { - return hdr.network - data; - } - - /* finally sort out TCP */ - if (nexthdr == IPPROTO_TCP) { - if ((hdr.network - data) > (max_len - sizeof(struct tcphdr))) - return max_len; - - /* access doff as a u8 to avoid unaligned access on ia64 */ - hlen = (hdr.network[12] & 0xF0) >> 2; - - /* verify hlen meets minimum size requirements */ - if (hlen < sizeof(struct tcphdr)) - return hdr.network - data; - - hdr.network += hlen; - } - - /* - * If everything has gone correctly hdr.network should be the - * data section of the packet and will be the end of the header. - * If not then it probably represents the end of the last recognized - * header. - */ - if ((hdr.network - data) < max_len) - return hdr.network - data; - else - return max_len; -} - -static void ixgbe_get_rsc_cnt(struct ixgbe_ring *rx_ring, - union ixgbe_adv_rx_desc *rx_desc, - struct sk_buff *skb) -{ - __le32 rsc_enabled; - u32 rsc_cnt; - - if (!ring_is_rsc_enabled(rx_ring)) - return; - - rsc_enabled = rx_desc->wb.lower.lo_dword.data & - cpu_to_le32(IXGBE_RXDADV_RSCCNT_MASK); - - /* If this is an RSC frame rsc_cnt should be non-zero */ - if (!rsc_enabled) - return; - - rsc_cnt = le32_to_cpu(rsc_enabled); - rsc_cnt >>= IXGBE_RXDADV_RSCCNT_SHIFT; - - IXGBE_CB(skb)->append_cnt += rsc_cnt - 1; -} - -static void ixgbe_set_rsc_gso_size(struct ixgbe_ring *ring, - struct sk_buff *skb) -{ - u16 hdr_len = skb_headlen(skb); - - /* set gso_size to avoid messing up TCP MSS */ - skb_shinfo(skb)->gso_size = DIV_ROUND_UP((skb->len - hdr_len), - IXGBE_CB(skb)->append_cnt); -} - -static void ixgbe_update_rsc_stats(struct ixgbe_ring *rx_ring, - struct sk_buff *skb) -{ - /* if append_cnt is 0 then frame is not RSC */ - if (!IXGBE_CB(skb)->append_cnt) - return; - - rx_ring->rx_stats.rsc_count += IXGBE_CB(skb)->append_cnt; - rx_ring->rx_stats.rsc_flush++; - - ixgbe_set_rsc_gso_size(rx_ring, skb); - - /* gso_size is computed using append_cnt so always clear it last */ - IXGBE_CB(skb)->append_cnt = 0; -} - -/** - * ixgbe_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 hash, checksum, VLAN, timestamp, protocol, and - * other fields within the skb. - **/ -static void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring, - union ixgbe_adv_rx_desc *rx_desc, - struct sk_buff *skb) -{ - ixgbe_update_rsc_stats(rx_ring, skb); - - ixgbe_rx_hash(rx_ring, rx_desc, skb); - - ixgbe_rx_checksum(rx_ring, rx_desc, skb); - - if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) { - u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan); - __vlan_hwaccel_put_tag(skb, vid); - } - - skb_record_rx_queue(skb, rx_ring->queue_index); - - skb->protocol = eth_type_trans(skb, rx_ring->netdev); -} - -static void ixgbe_rx_skb(struct ixgbe_q_vector *q_vector, - struct sk_buff *skb) -{ - struct ixgbe_adapter *adapter = q_vector->adapter; - - if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) - napi_gro_receive(&q_vector->napi, skb); - else - netif_rx(skb); -} - -/** - * ixgbe_is_non_eop - process handling of non-EOP buffers - * @rx_ring: Rx ring being processed - * @rx_desc: Rx descriptor for current buffer - * @skb: Current socket buffer containing buffer in progress - * - * 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 ixgbe_is_non_eop(struct ixgbe_ring *rx_ring, - union ixgbe_adv_rx_desc *rx_desc, - struct sk_buff *skb) -{ - 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(IXGBE_RX_DESC(rx_ring, ntc)); - - if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP))) - return false; - - /* append_cnt indicates packet is RSC, if so fetch nextp */ - if (IXGBE_CB(skb)->append_cnt) { - ntc = le32_to_cpu(rx_desc->wb.upper.status_error); - ntc &= IXGBE_RXDADV_NEXTP_MASK; - ntc >>= IXGBE_RXDADV_NEXTP_SHIFT; - } - - /* place skb in next buffer to be received */ - rx_ring->rx_buffer_info[ntc].skb = skb; - rx_ring->rx_stats.non_eop_descs++; - - return true; -} - -/** - * ixgbe_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 ixgbe_cleanup_headers(struct ixgbe_ring *rx_ring, - union ixgbe_adv_rx_desc *rx_desc, - struct sk_buff *skb) -{ - struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0]; - struct net_device *netdev = rx_ring->netdev; - unsigned char *va; - unsigned int pull_len; - - /* if the page was released unmap it, else just sync our portion */ - if (unlikely(IXGBE_CB(skb)->page_released)) { - dma_unmap_page(rx_ring->dev, IXGBE_CB(skb)->dma, - ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE); - IXGBE_CB(skb)->page_released = false; - } else { - dma_sync_single_range_for_cpu(rx_ring->dev, - IXGBE_CB(skb)->dma, - frag->page_offset, - ixgbe_rx_bufsz(rx_ring), - DMA_FROM_DEVICE); - } - IXGBE_CB(skb)->dma = 0; - - /* verify that the packet does not have any known errors */ - if (unlikely(ixgbe_test_staterr(rx_desc, - IXGBE_RXDADV_ERR_FRAME_ERR_MASK) && - !(netdev->features & NETIF_F_RXALL))) { - dev_kfree_skb_any(skb); - return true; - } - - /* - * it is valid to use page_address instead of kmap since we are - * working with pages allocated out of the lomem pool per - * alloc_page(GFP_ATOMIC) - */ - va = skb_frag_address(frag); - - /* - * we need the header to contain the greater of either ETH_HLEN or - * 60 bytes if the skb->len is less than 60 for skb_pad. - */ - pull_len = skb_frag_size(frag); - if (pull_len > 256) - pull_len = ixgbe_get_headlen(va, pull_len); - - /* align pull length to size of long to optimize memcpy performance */ - skb_copy_to_linear_data(skb, va, ALIGN(pull_len, sizeof(long))); - - /* update all of the pointers */ - skb_frag_size_sub(frag, pull_len); - frag->page_offset += pull_len; - skb->data_len -= pull_len; - skb->tail += pull_len; - - /* - * if we sucked the frag empty then we should free it, - * if there are other frags here something is screwed up in hardware - */ - if (skb_frag_size(frag) == 0) { - BUG_ON(skb_shinfo(skb)->nr_frags != 1); - skb_shinfo(skb)->nr_frags = 0; - __skb_frag_unref(frag); - skb->truesize -= ixgbe_rx_bufsz(rx_ring); - } - -#ifdef IXGBE_FCOE - /* do not attempt to pad FCoE Frames as this will disrupt DDP */ - if (ixgbe_rx_is_fcoe(rx_ring, rx_desc)) - return false; - -#endif - /* if skb_pad returns an error the skb was freed */ - if (unlikely(skb->len < 60)) { - int pad_len = 60 - skb->len; - - if (skb_pad(skb, pad_len)) - return true; - __skb_put(skb, pad_len); - } - - return false; -} - -/** - * ixgbe_can_reuse_page - determine if we can reuse a page - * @rx_buffer: pointer to rx_buffer containing the page we want to reuse - * - * Returns true if page can be reused in another Rx buffer - **/ -static inline bool ixgbe_can_reuse_page(struct ixgbe_rx_buffer *rx_buffer) -{ - struct page *page = rx_buffer->page; - - /* if we are only owner of page and it is local we can reuse it */ - return likely(page_count(page) == 1) && - likely(page_to_nid(page) == numa_node_id()); -} - -/** - * ixgbe_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 - * - * Syncronizes page for reuse by the adapter - **/ -static void ixgbe_reuse_rx_page(struct ixgbe_ring *rx_ring, - struct ixgbe_rx_buffer *old_buff) -{ - struct ixgbe_rx_buffer *new_buff; - u16 nta = rx_ring->next_to_alloc; - u16 bufsz = ixgbe_rx_bufsz(rx_ring); - - 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; - - /* flip page offset to other buffer and store to new_buff */ - new_buff->page_offset = old_buff->page_offset ^ bufsz; - - /* sync the buffer for use by the device */ - dma_sync_single_range_for_device(rx_ring->dev, new_buff->dma, - new_buff->page_offset, bufsz, - DMA_FROM_DEVICE); - - /* bump ref count on page before it is given to the stack */ - get_page(new_buff->page); -} - -/** - * ixgbe_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 - * @rx_desc: descriptor containing length of buffer written by hardware - * @skb: sk_buff to place the data into - * - * This function is based on skb_add_rx_frag. I would have used that - * function however it doesn't handle the truesize case correctly since we - * are allocating more memory than might be used for a single receive. - **/ -static void ixgbe_add_rx_frag(struct ixgbe_ring *rx_ring, - struct ixgbe_rx_buffer *rx_buffer, - struct sk_buff *skb, int size) -{ - skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, - rx_buffer->page, rx_buffer->page_offset, - size); - skb->len += size; - skb->data_len += size; - skb->truesize += ixgbe_rx_bufsz(rx_ring); -} - -/** - * ixgbe_clean_rx_irq - Clean completed descriptors from Rx ring - bounce buf - * @q_vector: structure containing interrupt and ring information - * @rx_ring: rx descriptor ring to transact packets on - * @budget: Total limit on number of packets to process - * - * This function provides a "bounce buffer" approach to Rx interrupt - * processing. The advantage to this is that on systems that have - * expensive overhead for IOMMU access this provides a means of avoiding - * it by maintaining the mapping of the page to the syste. - * - * Returns true if all work is completed without reaching budget - **/ -static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector, - struct ixgbe_ring *rx_ring, - int budget) -{ - unsigned int total_rx_bytes = 0, total_rx_packets = 0; -#ifdef IXGBE_FCOE - struct ixgbe_adapter *adapter = q_vector->adapter; - int ddp_bytes = 0; -#endif /* IXGBE_FCOE */ - u16 cleaned_count = ixgbe_desc_unused(rx_ring); - - do { - struct ixgbe_rx_buffer *rx_buffer; - union ixgbe_adv_rx_desc *rx_desc; - struct sk_buff *skb; - struct page *page; - u16 ntc; - - /* return some buffers to hardware, one at a time is too slow */ - if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) { - ixgbe_alloc_rx_buffers(rx_ring, cleaned_count); - cleaned_count = 0; - } - - ntc = rx_ring->next_to_clean; - rx_desc = IXGBE_RX_DESC(rx_ring, ntc); - rx_buffer = &rx_ring->rx_buffer_info[ntc]; - - if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_DD)) - 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(); - - page = rx_buffer->page; - prefetchw(page); - - skb = rx_buffer->skb; - - if (likely(!skb)) { - void *page_addr = page_address(page) + - rx_buffer->page_offset; - - /* prefetch first cache line of first page */ - prefetch(page_addr); -#if L1_CACHE_BYTES < 128 - prefetch(page_addr + L1_CACHE_BYTES); -#endif - - /* allocate a skb to store the frags */ - skb = netdev_alloc_skb_ip_align(rx_ring->netdev, - IXGBE_RX_HDR_SIZE); - if (unlikely(!skb)) { - rx_ring->rx_stats.alloc_rx_buff_failed++; - break; - } - - /* - * we will be copying header into skb->data in - * pskb_may_pull so it is in our interest to prefetch - * it now to avoid a possible cache miss - */ - prefetchw(skb->data); - - /* - * Delay unmapping of the first packet. It carries the - * header information, HW may still access the header - * after the writeback. Only unmap it when EOP is - * reached - */ - IXGBE_CB(skb)->dma = rx_buffer->dma; - } else { - /* 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, - ixgbe_rx_bufsz(rx_ring), - DMA_FROM_DEVICE); - } - - /* pull page into skb */ - ixgbe_add_rx_frag(rx_ring, rx_buffer, skb, - le16_to_cpu(rx_desc->wb.upper.length)); - - if (ixgbe_can_reuse_page(rx_buffer)) { - /* hand second half of page back to the ring */ - ixgbe_reuse_rx_page(rx_ring, rx_buffer); - } else if (IXGBE_CB(skb)->dma == rx_buffer->dma) { - /* the page has been released from the ring */ - IXGBE_CB(skb)->page_released = true; - } else { - /* we are not reusing the buffer so unmap it */ - dma_unmap_page(rx_ring->dev, rx_buffer->dma, - ixgbe_rx_pg_size(rx_ring), - DMA_FROM_DEVICE); - } - - /* clear contents of buffer_info */ - rx_buffer->skb = NULL; - rx_buffer->dma = 0; - rx_buffer->page = NULL; - - ixgbe_get_rsc_cnt(rx_ring, rx_desc, skb); - - cleaned_count++; - - /* place incomplete frames back on ring for completion */ - if (ixgbe_is_non_eop(rx_ring, rx_desc, skb)) - continue; - - /* verify the packet layout is correct */ - if (ixgbe_cleanup_headers(rx_ring, rx_desc, skb)) - continue; - - /* probably a little skewed due to removing CRC */ - total_rx_bytes += skb->len; - total_rx_packets++; - - /* populate checksum, timestamp, VLAN, and protocol */ - ixgbe_process_skb_fields(rx_ring, rx_desc, skb); - -#ifdef IXGBE_FCOE - /* if ddp, not passing to ULD unless for FCP_RSP or error */ - if (ixgbe_rx_is_fcoe(rx_ring, rx_desc)) { - ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb); - if (!ddp_bytes) { - dev_kfree_skb_any(skb); - continue; - } - } - -#endif /* IXGBE_FCOE */ - ixgbe_rx_skb(q_vector, skb); - - /* update budget accounting */ - budget--; - } while (likely(budget)); - -#ifdef IXGBE_FCOE - /* include DDPed FCoE data */ - if (ddp_bytes > 0) { - unsigned int mss; - - mss = rx_ring->netdev->mtu - sizeof(struct fcoe_hdr) - - sizeof(struct fc_frame_header) - - sizeof(struct fcoe_crc_eof); - if (mss > 512) - mss &= ~511; - total_rx_bytes += ddp_bytes; - total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss); - } - -#endif /* IXGBE_FCOE */ - 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; - - if (cleaned_count) - ixgbe_alloc_rx_buffers(rx_ring, cleaned_count); - - return !!budget; -} - -/** - * ixgbe_configure_msix - Configure MSI-X hardware - * @adapter: board private structure - * - * ixgbe_configure_msix sets up the hardware to properly generate MSI-X - * interrupts. - **/ -static void ixgbe_configure_msix(struct ixgbe_adapter *adapter) -{ - struct ixgbe_q_vector *q_vector; - int q_vectors, v_idx; - u32 mask; - - q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - - /* Populate MSIX to EITR Select */ - if (adapter->num_vfs > 32) { - u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1; - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel); - } - - /* - * Populate the IVAR table and set the ITR values to the - * corresponding register. - */ - for (v_idx = 0; v_idx < q_vectors; v_idx++) { - struct ixgbe_ring *ring; - q_vector = adapter->q_vector[v_idx]; - - ixgbe_for_each_ring(ring, q_vector->rx) - ixgbe_set_ivar(adapter, 0, ring->reg_idx, v_idx); - - ixgbe_for_each_ring(ring, q_vector->tx) - ixgbe_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_10K_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; - } - - ixgbe_write_eitr(q_vector); - } - - switch (adapter->hw.mac.type) { - case ixgbe_mac_82598EB: - ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX, - v_idx); - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - ixgbe_set_ivar(adapter, -1, 1, v_idx); - break; - default: - break; - } - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950); - - /* set up to autoclear timer, and the vectors */ - mask = IXGBE_EIMS_ENABLE_MASK; - mask &= ~(IXGBE_EIMS_OTHER | - IXGBE_EIMS_MAILBOX | - IXGBE_EIMS_LSC); - - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask); -} - -enum latency_range { - lowest_latency = 0, - low_latency = 1, - bulk_latency = 2, - latency_invalid = 255 -}; - -/** - * ixgbe_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. - * this functionality is controlled by the InterruptThrottleRate module - * parameter (see ixgbe_param.c) - **/ -static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector, - struct ixgbe_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 throttlerate management - * 0-10MB/s lowest (100000 ints/s) - * 10-20MB/s low (20000 ints/s) - * 20-1249MB/s bulk (8000 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; -} - -/** - * ixgbe_write_eitr - write EITR register in hardware specific way - * @q_vector: structure containing interrupt and ring information - * - * This function is made to be called by ethtool and by the driver - * when it needs to update EITR registers at runtime. Hardware - * specific quirks/differences are taken care of here. - */ -void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector) -{ - struct ixgbe_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; - - switch (adapter->hw.mac.type) { - case ixgbe_mac_82598EB: - /* must write high and low 16 bits to reset counter */ - itr_reg |= (itr_reg << 16); - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - /* - * set the WDIS bit to not clear the timer bits and cause an - * immediate assertion of the interrupt - */ - itr_reg |= IXGBE_EITR_CNT_WDIS; - break; - default: - break; - } - IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg); -} - -static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector) -{ - u32 new_itr = q_vector->itr; - u8 current_itr; - - ixgbe_update_itr(q_vector, &q_vector->tx); - ixgbe_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_8K_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; - - ixgbe_write_eitr(q_vector); - } -} - -/** - * ixgbe_check_overtemp_subtask - check for over temperature - * @adapter: pointer to adapter - **/ -static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 eicr = adapter->interrupt_event; - - if (test_bit(__IXGBE_DOWN, &adapter->state)) - return; - - if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) && - !(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT)) - return; - - adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT; - - switch (hw->device_id) { - case IXGBE_DEV_ID_82599_T3_LOM: - /* - * Since the warning interrupt is for both ports - * we don't have to check if: - * - This interrupt wasn't for our port. - * - We may have missed the interrupt so always have to - * check if we got a LSC - */ - if (!(eicr & IXGBE_EICR_GPI_SDP0) && - !(eicr & IXGBE_EICR_LSC)) - return; - - if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) { - u32 autoneg; - bool link_up = false; - - hw->mac.ops.check_link(hw, &autoneg, &link_up, false); - - if (link_up) - return; - } - - /* Check if this is not due to overtemp */ - if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP) - return; - - break; - default: - if (!(eicr & IXGBE_EICR_GPI_SDP0)) - return; - break; - } - e_crit(drv, - "Network adapter has been stopped because it has over heated. " - "Restart the computer. If the problem persists, " - "power off the system and replace the adapter\n"); - - adapter->interrupt_event = 0; -} - -static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr) -{ - struct ixgbe_hw *hw = &adapter->hw; - - if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) && - (eicr & IXGBE_EICR_GPI_SDP1)) { - e_crit(probe, "Fan has stopped, replace the adapter\n"); - /* write to clear the interrupt */ - IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1); - } -} - -static void ixgbe_check_overtemp_event(struct ixgbe_adapter *adapter, u32 eicr) -{ - if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)) - return; - - switch (adapter->hw.mac.type) { - case ixgbe_mac_82599EB: - /* - * Need to check link state so complete overtemp check - * on service task - */ - if (((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)) && - (!test_bit(__IXGBE_DOWN, &adapter->state))) { - adapter->interrupt_event = eicr; - adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT; - ixgbe_service_event_schedule(adapter); - return; - } - return; - case ixgbe_mac_X540: - if (!(eicr & IXGBE_EICR_TS)) - return; - break; - default: - return; - } - - e_crit(drv, - "Network adapter has been stopped because it has over heated. " - "Restart the computer. If the problem persists, " - "power off the system and replace the adapter\n"); -} - -static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr) -{ - struct ixgbe_hw *hw = &adapter->hw; - - if (eicr & IXGBE_EICR_GPI_SDP2) { - /* Clear the interrupt */ - IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2); - if (!test_bit(__IXGBE_DOWN, &adapter->state)) { - adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET; - ixgbe_service_event_schedule(adapter); - } - } - - if (eicr & IXGBE_EICR_GPI_SDP1) { - /* Clear the interrupt */ - IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1); - if (!test_bit(__IXGBE_DOWN, &adapter->state)) { - adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG; - ixgbe_service_event_schedule(adapter); - } - } -} - -static void ixgbe_check_lsc(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - - adapter->lsc_int++; - adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE; - adapter->link_check_timeout = jiffies; - if (!test_bit(__IXGBE_DOWN, &adapter->state)) { - IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC); - IXGBE_WRITE_FLUSH(hw); - ixgbe_service_event_schedule(adapter); - } -} - -static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter, - u64 qmask) -{ - u32 mask; - struct ixgbe_hw *hw = &adapter->hw; - - switch (hw->mac.type) { - case ixgbe_mac_82598EB: - mask = (IXGBE_EIMS_RTX_QUEUE & qmask); - IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask); - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - mask = (qmask & 0xFFFFFFFF); - if (mask) - IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask); - mask = (qmask >> 32); - if (mask) - IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask); - break; - default: - break; - } - /* skip the flush */ -} - -static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter, - u64 qmask) -{ - u32 mask; - struct ixgbe_hw *hw = &adapter->hw; - - switch (hw->mac.type) { - case ixgbe_mac_82598EB: - mask = (IXGBE_EIMS_RTX_QUEUE & qmask); - IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask); - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - mask = (qmask & 0xFFFFFFFF); - if (mask) - IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask); - mask = (qmask >> 32); - if (mask) - IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask); - break; - default: - break; - } - /* skip the flush */ -} - -/** - * ixgbe_irq_enable - Enable default interrupt generation settings - * @adapter: board private structure - **/ -static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues, - bool flush) -{ - u32 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE); - - /* don't reenable LSC while waiting for link */ - if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) - mask &= ~IXGBE_EIMS_LSC; - - if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) - switch (adapter->hw.mac.type) { - case ixgbe_mac_82599EB: - mask |= IXGBE_EIMS_GPI_SDP0; - break; - case ixgbe_mac_X540: - mask |= IXGBE_EIMS_TS; - break; - default: - break; - } - if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) - mask |= IXGBE_EIMS_GPI_SDP1; - switch (adapter->hw.mac.type) { - case ixgbe_mac_82599EB: - mask |= IXGBE_EIMS_GPI_SDP1; - mask |= IXGBE_EIMS_GPI_SDP2; - case ixgbe_mac_X540: - mask |= IXGBE_EIMS_ECC; - mask |= IXGBE_EIMS_MAILBOX; - break; - default: - break; - } - if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) && - !(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT)) - mask |= IXGBE_EIMS_FLOW_DIR; - - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask); - if (queues) - ixgbe_irq_enable_queues(adapter, ~0); - if (flush) - IXGBE_WRITE_FLUSH(&adapter->hw); -} - -static irqreturn_t ixgbe_msix_other(int irq, void *data) -{ - struct ixgbe_adapter *adapter = data; - struct ixgbe_hw *hw = &adapter->hw; - u32 eicr; - - /* - * Workaround for Silicon errata. Use clear-by-write instead - * of clear-by-read. Reading with EICS will return the - * interrupt causes without clearing, which later be done - * with the write to EICR. - */ - eicr = IXGBE_READ_REG(hw, IXGBE_EICS); - IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr); - - if (eicr & IXGBE_EICR_LSC) - ixgbe_check_lsc(adapter); - - if (eicr & IXGBE_EICR_MAILBOX) - ixgbe_msg_task(adapter); - - switch (hw->mac.type) { - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - if (eicr & IXGBE_EICR_ECC) - e_info(link, "Received unrecoverable ECC Err, please " - "reboot\n"); - /* Handle Flow Director Full threshold interrupt */ - if (eicr & IXGBE_EICR_FLOW_DIR) { - int reinit_count = 0; - int i; - for (i = 0; i < adapter->num_tx_queues; i++) { - struct ixgbe_ring *ring = adapter->tx_ring[i]; - if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE, - &ring->state)) - reinit_count++; - } - if (reinit_count) { - /* no more flow director interrupts until after init */ - IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR); - adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT; - ixgbe_service_event_schedule(adapter); - } - } - ixgbe_check_sfp_event(adapter, eicr); - ixgbe_check_overtemp_event(adapter, eicr); - break; - default: - break; - } - - ixgbe_check_fan_failure(adapter, eicr); - - /* re-enable the original interrupt state, no lsc, no queues */ - if (!test_bit(__IXGBE_DOWN, &adapter->state)) - ixgbe_irq_enable(adapter, false, false); - - return IRQ_HANDLED; -} - -static irqreturn_t ixgbe_msix_clean_rings(int irq, void *data) -{ - struct ixgbe_q_vector *q_vector = data; - - /* EIAM disabled interrupts (on this vector) for us */ - - if (q_vector->rx.ring || q_vector->tx.ring) - napi_schedule(&q_vector->napi); - - return IRQ_HANDLED; -} - -/** - * ixgbe_poll - NAPI Rx polling callback - * @napi: structure for representing this polling device - * @budget: how many packets driver is allowed to clean - * - * This function is used for legacy and MSI, NAPI mode - **/ -int ixgbe_poll(struct napi_struct *napi, int budget) -{ - struct ixgbe_q_vector *q_vector = - container_of(napi, struct ixgbe_q_vector, napi); - struct ixgbe_adapter *adapter = q_vector->adapter; - struct ixgbe_ring *ring; - int per_ring_budget; - bool clean_complete = true; - -#ifdef CONFIG_IXGBE_DCA - if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) - ixgbe_update_dca(q_vector); -#endif - - ixgbe_for_each_ring(ring, q_vector->tx) - clean_complete &= !!ixgbe_clean_tx_irq(q_vector, ring); - - /* 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; - - ixgbe_for_each_ring(ring, q_vector->rx) - clean_complete &= ixgbe_clean_rx_irq(q_vector, ring, - per_ring_budget); - - /* If all work not completed, return budget and keep polling */ - if (!clean_complete) - return budget; - - /* all work done, exit the polling mode */ - napi_complete(napi); - if (adapter->rx_itr_setting & 1) - ixgbe_set_itr(q_vector); - if (!test_bit(__IXGBE_DOWN, &adapter->state)) - ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx)); - - return 0; -} - -/** - * ixgbe_request_msix_irqs - Initialize MSI-X interrupts - * @adapter: board private structure - * - * ixgbe_request_msix_irqs allocates MSI-X vectors and requests - * interrupts from the kernel. - **/ -static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - int vector, err; - int ri = 0, ti = 0; - - for (vector = 0; vector < q_vectors; vector++) { - struct ixgbe_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) - 1, - "%s-%s-%d", netdev->name, "TxRx", ri++); - ti++; - } else if (q_vector->rx.ring) { - snprintf(q_vector->name, sizeof(q_vector->name) - 1, - "%s-%s-%d", netdev->name, "rx", ri++); - } else if (q_vector->tx.ring) { - snprintf(q_vector->name, sizeof(q_vector->name) - 1, - "%s-%s-%d", netdev->name, "tx", ti++); - } else { - /* skip this unused q_vector */ - continue; - } - err = request_irq(entry->vector, &ixgbe_msix_clean_rings, 0, - q_vector->name, q_vector); - if (err) { - e_err(probe, "request_irq failed for MSIX interrupt " - "Error: %d\n", err); - goto free_queue_irqs; - } - /* If Flow Director is enabled, set interrupt affinity */ - if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) { - /* assign the mask for this irq */ - irq_set_affinity_hint(entry->vector, - &q_vector->affinity_mask); - } - } - - err = request_irq(adapter->msix_entries[vector].vector, - ixgbe_msix_other, 0, netdev->name, adapter); - if (err) { - e_err(probe, "request_irq for msix_other failed: %d\n", err); - goto free_queue_irqs; - } - - return 0; - -free_queue_irqs: - while (vector) { - vector--; - irq_set_affinity_hint(adapter->msix_entries[vector].vector, - NULL); - free_irq(adapter->msix_entries[vector].vector, - adapter->q_vector[vector]); - } - adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED; - pci_disable_msix(adapter->pdev); - kfree(adapter->msix_entries); - adapter->msix_entries = NULL; - return err; -} - -/** - * ixgbe_intr - legacy mode Interrupt Handler - * @irq: interrupt number - * @data: pointer to a network interface device structure - **/ -static irqreturn_t ixgbe_intr(int irq, void *data) -{ - struct ixgbe_adapter *adapter = data; - struct ixgbe_hw *hw = &adapter->hw; - struct ixgbe_q_vector *q_vector = adapter->q_vector[0]; - u32 eicr; - - /* - * Workaround for silicon errata #26 on 82598. Mask the interrupt - * before the read of EICR. - */ - IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK); - - /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read - * therefore no explicit interrupt disable is necessary */ - eicr = IXGBE_READ_REG(hw, IXGBE_EICR); - if (!eicr) { - /* - * shared interrupt alert! - * make sure interrupts are enabled because the read will - * have disabled interrupts due to EIAM - * finish the workaround of silicon errata on 82598. Unmask - * the interrupt that we masked before the EICR read. - */ - if (!test_bit(__IXGBE_DOWN, &adapter->state)) - ixgbe_irq_enable(adapter, true, true); - return IRQ_NONE; /* Not our interrupt */ - } - - if (eicr & IXGBE_EICR_LSC) - ixgbe_check_lsc(adapter); - - switch (hw->mac.type) { - case ixgbe_mac_82599EB: - ixgbe_check_sfp_event(adapter, eicr); - /* Fall through */ - case ixgbe_mac_X540: - if (eicr & IXGBE_EICR_ECC) - e_info(link, "Received unrecoverable ECC err, please " - "reboot\n"); - ixgbe_check_overtemp_event(adapter, eicr); - break; - default: - break; - } - - ixgbe_check_fan_failure(adapter, eicr); - - /* would disable interrupts here but EIAM disabled it */ - napi_schedule(&q_vector->napi); - - /* - * re-enable link(maybe) and non-queue interrupts, no flush. - * ixgbe_poll will re-enable the queue interrupts - */ - if (!test_bit(__IXGBE_DOWN, &adapter->state)) - ixgbe_irq_enable(adapter, false, false); - - return IRQ_HANDLED; -} - -/** - * ixgbe_request_irq - initialize interrupts - * @adapter: board private structure - * - * Attempts to configure interrupts using the best available - * capabilities of the hardware and kernel. - **/ -static int ixgbe_request_irq(struct ixgbe_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - int err; - - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) - err = ixgbe_request_msix_irqs(adapter); - else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) - err = request_irq(adapter->pdev->irq, ixgbe_intr, 0, - netdev->name, adapter); - else - err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED, - netdev->name, adapter); - - if (err) - e_err(probe, "request_irq failed, Error %d\n", err); - - return err; -} - -static void ixgbe_free_irq(struct ixgbe_adapter *adapter) -{ - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { - int i, q_vectors; - - 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; - - /* clear the affinity_mask in the IRQ descriptor */ - irq_set_affinity_hint(adapter->msix_entries[i].vector, - NULL); - - free_irq(adapter->msix_entries[i].vector, - adapter->q_vector[i]); - } - } else { - free_irq(adapter->pdev->irq, adapter); - } -} - -/** - * ixgbe_irq_disable - Mask off interrupt generation on the NIC - * @adapter: board private structure - **/ -static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter) -{ - switch (adapter->hw.mac.type) { - case ixgbe_mac_82598EB: - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0); - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0); - break; - default: - break; - } - IXGBE_WRITE_FLUSH(&adapter->hw); - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { - int i; - for (i = 0; i < adapter->num_msix_vectors; i++) - synchronize_irq(adapter->msix_entries[i].vector); - } else { - synchronize_irq(adapter->pdev->irq); - } -} - -/** - * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts - * - **/ -static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter) -{ - struct ixgbe_q_vector *q_vector = adapter->q_vector[0]; - - /* rx/tx vector */ - if (adapter->rx_itr_setting == 1) - q_vector->itr = IXGBE_20K_ITR; - else - q_vector->itr = adapter->rx_itr_setting; - - ixgbe_write_eitr(q_vector); - - ixgbe_set_ivar(adapter, 0, 0, 0); - ixgbe_set_ivar(adapter, 1, 0, 0); - - e_info(hw, "Legacy interrupt IVAR setup done\n"); -} - -/** - * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset - * @adapter: board private structure - * @ring: structure containing ring specific data - * - * Configure the Tx descriptor ring after a reset. - **/ -void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter, - struct ixgbe_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_TXDCTL(reg_idx), 0); - IXGBE_WRITE_FLUSH(hw); - - IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx), - (tdba & DMA_BIT_MASK(32))); - IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32)); - IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx), - ring->count * sizeof(union ixgbe_adv_tx_desc)); - IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0); - IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0); - ring->tail = hw->hw_addr + IXGBE_TDT(reg_idx); - - /* - * set WTHRESH to encourage burst writeback, it should not be set - * higher than 1 when ITR is 0 as it could cause false TX hangs - * - * 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. - */ - if (!ring->q_vector || (ring->q_vector->itr < 8)) - txdctl |= (1 << 16); /* WTHRESH = 1 */ - else - txdctl |= (8 << 16); /* WTHRESH = 8 */ - - /* - * Setting PTHRESH to 32 both improves performance - * and avoids a TX hang with DFP enabled - */ - txdctl |= (1 << 8) | /* HTHRESH = 1 */ - 32; /* PTHRESH = 32 */ - - /* reinitialize flowdirector state */ - if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) && - adapter->atr_sample_rate) { - ring->atr_sample_rate = adapter->atr_sample_rate; - ring->atr_count = 0; - set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state); - } else { - ring->atr_sample_rate = 0; - } - - clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state); - - /* enable queue */ - IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl); - - /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */ - if (hw->mac.type == ixgbe_mac_82598EB && - !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP)) - return; - - /* poll to verify queue is enabled */ - do { - usleep_range(1000, 2000); - txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx)); - } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE)); - if (!wait_loop) - e_err(drv, "Could not enable Tx Queue %d\n", reg_idx); -} - -static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 rttdcs; - u32 reg; - u8 tcs = netdev_get_num_tc(adapter->netdev); - - if (hw->mac.type == ixgbe_mac_82598EB) - return; - - /* disable the arbiter while setting MTQC */ - rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS); - rttdcs |= IXGBE_RTTDCS_ARBDIS; - IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs); - - /* set transmit pool layout */ - switch (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { - case (IXGBE_FLAG_SRIOV_ENABLED): - IXGBE_WRITE_REG(hw, IXGBE_MTQC, - (IXGBE_MTQC_VT_ENA | IXGBE_MTQC_64VF)); - break; - default: - if (!tcs) - reg = IXGBE_MTQC_64Q_1PB; - else if (tcs <= 4) - reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ; - else - reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ; - - IXGBE_WRITE_REG(hw, IXGBE_MTQC, reg); - - /* Enable Security TX Buffer IFG for multiple pb */ - if (tcs) { - reg = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG); - reg |= IXGBE_SECTX_DCB; - IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, reg); - } - break; - } - - /* re-enable the arbiter */ - rttdcs &= ~IXGBE_RTTDCS_ARBDIS; - IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs); -} - -/** - * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset - * @adapter: board private structure - * - * Configure the Tx unit of the MAC after a reset. - **/ -static void ixgbe_configure_tx(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 dmatxctl; - u32 i; - - ixgbe_setup_mtqc(adapter); - - if (hw->mac.type != ixgbe_mac_82598EB) { - /* DMATXCTL.EN must be before Tx queues are enabled */ - dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL); - dmatxctl |= IXGBE_DMATXCTL_TE; - IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl); - } - - /* Setup the HW Tx Head and Tail descriptor pointers */ - for (i = 0; i < adapter->num_tx_queues; i++) - ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]); -} - -#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2 - -static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter, - struct ixgbe_ring *rx_ring) -{ - u32 srrctl; - u8 reg_idx = rx_ring->reg_idx; - - switch (adapter->hw.mac.type) { - case ixgbe_mac_82598EB: { - struct ixgbe_ring_feature *feature = adapter->ring_feature; - const int mask = feature[RING_F_RSS].mask; - reg_idx = reg_idx & mask; - } - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - default: - break; - } - - srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx)); - - srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK; - srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK; - if (adapter->num_vfs) - srrctl |= IXGBE_SRRCTL_DROP_EN; - - srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) & - IXGBE_SRRCTL_BSIZEHDR_MASK; - -#if PAGE_SIZE > IXGBE_MAX_RXBUFFER - srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; -#else - srrctl |= ixgbe_rx_bufsz(rx_ring) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; -#endif - srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF; - - IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx), srrctl); -} - -static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D, - 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE, - 0x6A3E67EA, 0x14364D17, 0x3BED200D}; - u32 mrqc = 0, reta = 0; - u32 rxcsum; - int i, j; - u8 tcs = netdev_get_num_tc(adapter->netdev); - int maxq = adapter->ring_feature[RING_F_RSS].indices; - - if (tcs) - maxq = min(maxq, adapter->num_tx_queues / tcs); - - /* Fill out hash function seeds */ - for (i = 0; i < 10; i++) - IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]); - - /* Fill out redirection table */ - for (i = 0, j = 0; i < 128; i++, j++) { - if (j == maxq) - j = 0; - /* reta = 4-byte sliding window of - * 0x00..(indices-1)(indices-1)00..etc. */ - reta = (reta << 8) | (j * 0x11); - if ((i & 3) == 3) - IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta); - } - - /* Disable indicating checksum in descriptor, enables RSS hash */ - rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM); - rxcsum |= IXGBE_RXCSUM_PCSD; - IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum); - - if (adapter->hw.mac.type == ixgbe_mac_82598EB && - (adapter->flags & IXGBE_FLAG_RSS_ENABLED)) { - mrqc = IXGBE_MRQC_RSSEN; - } else { - int mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED - | IXGBE_FLAG_SRIOV_ENABLED); - - switch (mask) { - case (IXGBE_FLAG_RSS_ENABLED): - if (!tcs) - mrqc = IXGBE_MRQC_RSSEN; - else if (tcs <= 4) - mrqc = IXGBE_MRQC_RTRSS4TCEN; - else - mrqc = IXGBE_MRQC_RTRSS8TCEN; - break; - case (IXGBE_FLAG_SRIOV_ENABLED): - mrqc = IXGBE_MRQC_VMDQEN; - break; - default: - break; - } - } - - /* Perform hash on these packet types */ - mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4 - | IXGBE_MRQC_RSS_FIELD_IPV4_TCP - | IXGBE_MRQC_RSS_FIELD_IPV6 - | IXGBE_MRQC_RSS_FIELD_IPV6_TCP; - - if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV4_UDP) - mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4_UDP; - if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV6_UDP) - mrqc |= IXGBE_MRQC_RSS_FIELD_IPV6_UDP; - - IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc); -} - -/** - * ixgbe_configure_rscctl - enable RSC for the indicated ring - * @adapter: address of board private structure - * @index: index of ring to set - **/ -static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter, - struct ixgbe_ring *ring) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 rscctrl; - u8 reg_idx = ring->reg_idx; - - if (!ring_is_rsc_enabled(ring)) - return; - - rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx)); - rscctrl |= IXGBE_RSCCTL_RSCEN; - /* - * we must limit the number of descriptors so that the - * total size of max desc * buf_len is not greater - * than 65536 - */ -#if (PAGE_SIZE <= 8192) - rscctrl |= IXGBE_RSCCTL_MAXDESC_16; -#elif (PAGE_SIZE <= 16384) - rscctrl |= IXGBE_RSCCTL_MAXDESC_8; -#else - rscctrl |= IXGBE_RSCCTL_MAXDESC_4; -#endif - IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl); -} - -/** - * ixgbe_set_uta - Set unicast filter table address - * @adapter: board private structure - * - * The unicast table address is a register array of 32-bit registers. - * The table is meant to be used in a way similar to how the MTA is used - * however due to certain limitations in the hardware it is necessary to - * set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscuous - * enable bit to allow vlan tag stripping when promiscuous mode is enabled - **/ -static void ixgbe_set_uta(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - int i; - - /* The UTA table only exists on 82599 hardware and newer */ - if (hw->mac.type < ixgbe_mac_82599EB) - return; - - /* we only need to do this if VMDq is enabled */ - if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) - return; - - for (i = 0; i < 128; i++) - IXGBE_WRITE_REG(hw, IXGBE_UTA(i), ~0); -} - -#define IXGBE_MAX_RX_DESC_POLL 10 -static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter, - struct ixgbe_ring *ring) -{ - struct ixgbe_hw *hw = &adapter->hw; - int wait_loop = IXGBE_MAX_RX_DESC_POLL; - u32 rxdctl; - u8 reg_idx = ring->reg_idx; - - /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */ - if (hw->mac.type == ixgbe_mac_82598EB && - !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP)) - return; - - do { - usleep_range(1000, 2000); - rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx)); - } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE)); - - if (!wait_loop) { - e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within " - "the polling period\n", reg_idx); - } -} - -void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter, - struct ixgbe_ring *ring) -{ - struct ixgbe_hw *hw = &adapter->hw; - int wait_loop = IXGBE_MAX_RX_DESC_POLL; - u32 rxdctl; - u8 reg_idx = ring->reg_idx; - - rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx)); - rxdctl &= ~IXGBE_RXDCTL_ENABLE; - - /* write value back with RXDCTL.ENABLE bit cleared */ - IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl); - - if (hw->mac.type == ixgbe_mac_82598EB && - !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP)) - return; - - /* the hardware may take up to 100us to really disable the rx queue */ - do { - udelay(10); - rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx)); - } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE)); - - if (!wait_loop) { - e_err(drv, "RXDCTL.ENABLE on Rx queue %d not cleared within " - "the polling period\n", reg_idx); - } -} - -void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter, - struct ixgbe_ring *ring) -{ - struct ixgbe_hw *hw = &adapter->hw; - 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_RXDCTL(reg_idx)); - ixgbe_disable_rx_queue(adapter, ring); - - IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32))); - IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32)); - IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx), - ring->count * sizeof(union ixgbe_adv_rx_desc)); - IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0); - IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0); - ring->tail = hw->hw_addr + IXGBE_RDT(reg_idx); - - ixgbe_configure_srrctl(adapter, ring); - ixgbe_configure_rscctl(adapter, ring); - - /* If operating in IOV mode set RLPML for X540 */ - if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) && - hw->mac.type == ixgbe_mac_X540) { - rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK; - rxdctl |= ((ring->netdev->mtu + ETH_HLEN + - ETH_FCS_LEN + VLAN_HLEN) | IXGBE_RXDCTL_RLPML_EN); - } - - if (hw->mac.type == ixgbe_mac_82598EB) { - /* - * enable cache line friendly hardware writes: - * PTHRESH=32 descriptors (half the internal cache), - * this also removes ugly rx_no_buffer_count increment - * HTHRESH=4 descriptors (to minimize latency on fetch) - * WTHRESH=8 burst writeback up to two cache lines - */ - rxdctl &= ~0x3FFFFF; - rxdctl |= 0x080420; - } - - /* enable receive descriptor ring */ - rxdctl |= IXGBE_RXDCTL_ENABLE; - IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl); - - ixgbe_rx_desc_queue_enable(adapter, ring); - ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring)); -} - -static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - int p; - - /* PSRTYPE must be initialized in non 82598 adapters */ - u32 psrtype = IXGBE_PSRTYPE_TCPHDR | - IXGBE_PSRTYPE_UDPHDR | - IXGBE_PSRTYPE_IPV4HDR | - IXGBE_PSRTYPE_L2HDR | - IXGBE_PSRTYPE_IPV6HDR; - - if (hw->mac.type == ixgbe_mac_82598EB) - return; - - if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) - psrtype |= (adapter->num_rx_queues_per_pool << 29); - - for (p = 0; p < adapter->num_rx_pools; p++) - IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(adapter->num_vfs + p), - psrtype); -} - -static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 gcr_ext; - u32 vt_reg_bits; - u32 reg_offset, vf_shift; - u32 vmdctl; - int i; - - if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) - return; - - vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL); - vt_reg_bits = IXGBE_VMD_CTL_VMDQ_EN | IXGBE_VT_CTL_REPLEN; - vt_reg_bits |= (adapter->num_vfs << IXGBE_VT_CTL_POOL_SHIFT); - IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl | vt_reg_bits); - - vf_shift = adapter->num_vfs % 32; - reg_offset = (adapter->num_vfs >= 32) ? 1 : 0; - - /* Enable only the PF's pool for Tx/Rx */ - IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (1 << vf_shift)); - IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), 0); - IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (1 << vf_shift)); - IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), 0); - IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN); - - /* Map PF MAC address in RAR Entry 0 to first pool following VFs */ - hw->mac.ops.set_vmdq(hw, 0, adapter->num_vfs); - - /* - * Set up VF register offsets for selected VT Mode, - * i.e. 32 or 64 VFs for SR-IOV - */ - gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT); - gcr_ext |= IXGBE_GCR_EXT_MSIX_EN; - gcr_ext |= IXGBE_GCR_EXT_VT_MODE_64; - IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext); - - /* enable Tx loopback for VF/PF communication */ - IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN); - /* Enable MAC Anti-Spoofing */ - hw->mac.ops.set_mac_anti_spoofing(hw, - (adapter->num_vfs != 0), - adapter->num_vfs); - /* For VFs that have spoof checking turned off */ - for (i = 0; i < adapter->num_vfs; i++) { - if (!adapter->vfinfo[i].spoofchk_enabled) - ixgbe_ndo_set_vf_spoofchk(adapter->netdev, i, false); - } -} - -static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - struct net_device *netdev = adapter->netdev; - int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; - struct ixgbe_ring *rx_ring; - int i; - u32 mhadd, hlreg0; - -#ifdef IXGBE_FCOE - /* adjust max frame to be able to do baby jumbo for FCoE */ - if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) && - (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE)) - max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE; - -#endif /* IXGBE_FCOE */ - mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD); - if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) { - mhadd &= ~IXGBE_MHADD_MFS_MASK; - mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT; - - IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd); - } - - /* MHADD will allow an extra 4 bytes past for vlan tagged frames */ - max_frame += VLAN_HLEN; - - hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0); - /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */ - hlreg0 |= IXGBE_HLREG0_JUMBOEN; - IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0); - - /* - * 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++) { - rx_ring = adapter->rx_ring[i]; - if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) - set_ring_rsc_enabled(rx_ring); - else - clear_ring_rsc_enabled(rx_ring); - } -} - -static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL); - - switch (hw->mac.type) { - case ixgbe_mac_82598EB: - /* - * For VMDq support of different descriptor types or - * buffer sizes through the use of multiple SRRCTL - * registers, RDRXCTL.MVMEN must be set to 1 - * - * also, the manual doesn't mention it clearly but DCA hints - * will only use queue 0's tags unless this bit is set. Side - * effects of setting this bit are only that SRRCTL must be - * fully programmed [0..15] - */ - rdrxctl |= IXGBE_RDRXCTL_MVMEN; - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - /* Disable RSC for ACK packets */ - IXGBE_WRITE_REG(hw, IXGBE_RSCDBU, - (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU))); - rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE; - /* hardware requires some bits to be set by default */ - rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX); - rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP; - break; - default: - /* We should do nothing since we don't know this hardware */ - return; - } - - IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl); -} - -/** - * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset - * @adapter: board private structure - * - * Configure the Rx unit of the MAC after a reset. - **/ -static void ixgbe_configure_rx(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - int i; - u32 rxctrl; - - /* disable receives while setting up the descriptors */ - rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL); - IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN); - - ixgbe_setup_psrtype(adapter); - ixgbe_setup_rdrxctl(adapter); - - /* Program registers for the distribution of queues */ - ixgbe_setup_mrqc(adapter); - - ixgbe_set_uta(adapter); - - /* set_rx_buffer_len must be called before ring initialization */ - ixgbe_set_rx_buffer_len(adapter); - - /* - * 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++) - ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]); - - /* disable drop enable for 82598 parts */ - if (hw->mac.type == ixgbe_mac_82598EB) - rxctrl |= IXGBE_RXCTRL_DMBYPS; - - /* enable all receives */ - rxctrl |= IXGBE_RXCTRL_RXEN; - hw->mac.ops.enable_rx_dma(hw, rxctrl); -} - -static int ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - int pool_ndx = adapter->num_vfs; - - /* add VID to filter table */ - hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, true); - set_bit(vid, adapter->active_vlans); - - return 0; -} - -static int ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - int pool_ndx = adapter->num_vfs; - - /* remove VID from filter table */ - hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, false); - clear_bit(vid, adapter->active_vlans); - - return 0; -} - -/** - * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering - * @adapter: driver data - */ -static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 vlnctrl; - - vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL); - vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN); - IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl); -} - -/** - * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering - * @adapter: driver data - */ -static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 vlnctrl; - - vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL); - vlnctrl |= IXGBE_VLNCTRL_VFE; - vlnctrl &= ~IXGBE_VLNCTRL_CFIEN; - IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl); -} - -/** - * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping - * @adapter: driver data - */ -static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 vlnctrl; - int i, j; - - switch (hw->mac.type) { - case ixgbe_mac_82598EB: - vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL); - vlnctrl &= ~IXGBE_VLNCTRL_VME; - IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl); - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - for (i = 0; i < adapter->num_rx_queues; i++) { - j = adapter->rx_ring[i]->reg_idx; - vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j)); - vlnctrl &= ~IXGBE_RXDCTL_VME; - IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl); - } - break; - default: - break; - } -} - -/** - * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping - * @adapter: driver data - */ -static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 vlnctrl; - int i, j; - - switch (hw->mac.type) { - case ixgbe_mac_82598EB: - vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL); - vlnctrl |= IXGBE_VLNCTRL_VME; - IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl); - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - for (i = 0; i < adapter->num_rx_queues; i++) { - j = adapter->rx_ring[i]->reg_idx; - vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j)); - vlnctrl |= IXGBE_RXDCTL_VME; - IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl); - } - break; - default: - break; - } -} - -static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter) -{ - u16 vid; - - ixgbe_vlan_rx_add_vid(adapter->netdev, 0); - - for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) - ixgbe_vlan_rx_add_vid(adapter->netdev, vid); -} - -/** - * ixgbe_write_uc_addr_list - write unicast addresses to RAR table - * @netdev: network interface device structure - * - * Writes unicast address list to the RAR table. - * Returns: -ENOMEM on failure/insufficient address space - * 0 on no addresses written - * X on writing X addresses to the RAR table - **/ -static int ixgbe_write_uc_addr_list(struct net_device *netdev) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - unsigned int vfn = adapter->num_vfs; - unsigned int rar_entries = IXGBE_MAX_PF_MACVLANS; - int count = 0; - - /* return ENOMEM indicating insufficient memory for addresses */ - if (netdev_uc_count(netdev) > rar_entries) - return -ENOMEM; - - if (!netdev_uc_empty(netdev) && rar_entries) { - struct netdev_hw_addr *ha; - /* return error if we do not support writing to RAR table */ - if (!hw->mac.ops.set_rar) - return -ENOMEM; - - netdev_for_each_uc_addr(ha, netdev) { - if (!rar_entries) - break; - hw->mac.ops.set_rar(hw, rar_entries--, ha->addr, - vfn, IXGBE_RAH_AV); - count++; - } - } - /* write the addresses in reverse order to avoid write combining */ - for (; rar_entries > 0 ; rar_entries--) - hw->mac.ops.clear_rar(hw, rar_entries); - - return count; -} - -/** - * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set - * @netdev: network interface device structure - * - * The set_rx_method entry point is called whenever the unicast/multicast - * address list or the network interface flags are updated. This routine is - * responsible for configuring the hardware for proper unicast, multicast and - * promiscuous mode. - **/ -void ixgbe_set_rx_mode(struct net_device *netdev) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE; - int count; - - /* Check for Promiscuous and All Multicast modes */ - - fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL); - - /* set all bits that we expect to always be set */ - fctrl &= ~IXGBE_FCTRL_SBP; /* disable store-bad-packets */ - fctrl |= IXGBE_FCTRL_BAM; - fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */ - fctrl |= IXGBE_FCTRL_PMCF; - - /* clear the bits we are changing the status of */ - fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE); - - if (netdev->flags & IFF_PROMISC) { - hw->addr_ctrl.user_set_promisc = true; - fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE); - vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE); - /* don't hardware filter vlans in promisc mode */ - ixgbe_vlan_filter_disable(adapter); - } else { - if (netdev->flags & IFF_ALLMULTI) { - fctrl |= IXGBE_FCTRL_MPE; - vmolr |= IXGBE_VMOLR_MPE; - } else { - /* - * Write addresses to the MTA, if the attempt fails - * then we should just turn on promiscuous mode so - * that we can at least receive multicast traffic - */ - hw->mac.ops.update_mc_addr_list(hw, netdev); - vmolr |= IXGBE_VMOLR_ROMPE; - } - ixgbe_vlan_filter_enable(adapter); - hw->addr_ctrl.user_set_promisc = false; - /* - * Write addresses to available RAR registers, if there is not - * sufficient space to store all the addresses then enable - * unicast promiscuous mode - */ - count = ixgbe_write_uc_addr_list(netdev); - if (count < 0) { - fctrl |= IXGBE_FCTRL_UPE; - vmolr |= IXGBE_VMOLR_ROPE; - } - } - - if (adapter->num_vfs) { - ixgbe_restore_vf_multicasts(adapter); - vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(adapter->num_vfs)) & - ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE | - IXGBE_VMOLR_ROPE); - IXGBE_WRITE_REG(hw, IXGBE_VMOLR(adapter->num_vfs), vmolr); - } - - /* This is useful for sniffing bad packets. */ - if (adapter->netdev->features & NETIF_F_RXALL) { - /* UPE and MPE will be handled by normal PROMISC logic - * in e1000e_set_rx_mode */ - fctrl |= (IXGBE_FCTRL_SBP | /* Receive bad packets */ - IXGBE_FCTRL_BAM | /* RX All Bcast Pkts */ - IXGBE_FCTRL_PMCF); /* RX All MAC Ctrl Pkts */ - - fctrl &= ~(IXGBE_FCTRL_DPF); - /* NOTE: VLAN filtering is disabled by setting PROMISC */ - } - - IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl); - - if (netdev->features & NETIF_F_HW_VLAN_RX) - ixgbe_vlan_strip_enable(adapter); - else - ixgbe_vlan_strip_disable(adapter); -} - -static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter) -{ - int q_idx; - struct ixgbe_q_vector *q_vector; - int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - - /* legacy and MSI only use one vector */ - if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) - q_vectors = 1; - - for (q_idx = 0; q_idx < q_vectors; q_idx++) { - q_vector = adapter->q_vector[q_idx]; - napi_enable(&q_vector->napi); - } -} - -static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter) -{ - int q_idx; - struct ixgbe_q_vector *q_vector; - int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - - /* legacy and MSI only use one vector */ - if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) - q_vectors = 1; - - for (q_idx = 0; q_idx < q_vectors; q_idx++) { - q_vector = adapter->q_vector[q_idx]; - napi_disable(&q_vector->napi); - } -} - -#ifdef CONFIG_IXGBE_DCB -/* - * ixgbe_configure_dcb - Configure DCB hardware - * @adapter: ixgbe adapter struct - * - * This is called by the driver on open to configure the DCB hardware. - * This is also called by the gennetlink interface when reconfiguring - * the DCB state. - */ -static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN; - - if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) { - if (hw->mac.type == ixgbe_mac_82598EB) - netif_set_gso_max_size(adapter->netdev, 65536); - return; - } - - if (hw->mac.type == ixgbe_mac_82598EB) - netif_set_gso_max_size(adapter->netdev, 32768); - - - /* Enable VLAN tag insert/strip */ - adapter->netdev->features |= NETIF_F_HW_VLAN_RX; - - hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true); - -#ifdef IXGBE_FCOE - if (adapter->netdev->features & NETIF_F_FCOE_MTU) - max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE); -#endif - - /* reconfigure the hardware */ - if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE) { - ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame, - DCB_TX_CONFIG); - ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame, - DCB_RX_CONFIG); - ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg); - } else if (adapter->ixgbe_ieee_ets && adapter->ixgbe_ieee_pfc) { - ixgbe_dcb_hw_ets(&adapter->hw, - adapter->ixgbe_ieee_ets, - max_frame); - ixgbe_dcb_hw_pfc_config(&adapter->hw, - adapter->ixgbe_ieee_pfc->pfc_en, - adapter->ixgbe_ieee_ets->prio_tc); - } - - /* Enable RSS Hash per TC */ - if (hw->mac.type != ixgbe_mac_82598EB) { - int i; - u32 reg = 0; - - for (i = 0; i < MAX_TRAFFIC_CLASS; i++) { - u8 msb = 0; - u8 cnt = adapter->netdev->tc_to_txq[i].count; - - while (cnt >>= 1) - msb++; - - reg |= msb << IXGBE_RQTC_SHIFT_TC(i); - } - IXGBE_WRITE_REG(hw, IXGBE_RQTC, reg); - } -} -#endif - -/* Additional bittime to account for IXGBE framing */ -#define IXGBE_ETH_FRAMING 20 - -/* - * ixgbe_hpbthresh - calculate high water mark for flow control - * - * @adapter: board private structure to calculate for - * @pb - packet buffer to calculate - */ -static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb) -{ - struct ixgbe_hw *hw = &adapter->hw; - struct net_device *dev = adapter->netdev; - int link, tc, kb, marker; - u32 dv_id, rx_pba; - - /* Calculate max LAN frame size */ - tc = link = dev->mtu + ETH_HLEN + ETH_FCS_LEN + IXGBE_ETH_FRAMING; - -#ifdef IXGBE_FCOE - /* FCoE traffic class uses FCOE jumbo frames */ - if (dev->features & NETIF_F_FCOE_MTU) { - int fcoe_pb = 0; - -#ifdef CONFIG_IXGBE_DCB - fcoe_pb = netdev_get_prio_tc_map(dev, adapter->fcoe.up); - -#endif - if (fcoe_pb == pb && tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) - tc = IXGBE_FCOE_JUMBO_FRAME_SIZE; - } -#endif - - /* Calculate delay value for device */ - switch (hw->mac.type) { - case ixgbe_mac_X540: - dv_id = IXGBE_DV_X540(link, tc); - break; - default: - dv_id = IXGBE_DV(link, tc); - break; - } - - /* Loopback switch introduces additional latency */ - if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) - dv_id += IXGBE_B2BT(tc); - - /* Delay value is calculated in bit times convert to KB */ - kb = IXGBE_BT2KB(dv_id); - rx_pba = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(pb)) >> 10; - - marker = rx_pba - kb; - - /* It is possible that the packet buffer is not large enough - * to provide required headroom. In this case throw an error - * to user and a do the best we can. - */ - if (marker < 0) { - e_warn(drv, "Packet Buffer(%i) can not provide enough" - "headroom to support flow control." - "Decrease MTU or number of traffic classes\n", pb); - marker = tc + 1; - } - - return marker; -} - -/* - * ixgbe_lpbthresh - calculate low water mark for for flow control - * - * @adapter: board private structure to calculate for - * @pb - packet buffer to calculate - */ -static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - struct net_device *dev = adapter->netdev; - int tc; - u32 dv_id; - - /* Calculate max LAN frame size */ - tc = dev->mtu + ETH_HLEN + ETH_FCS_LEN; - - /* Calculate delay value for device */ - switch (hw->mac.type) { - case ixgbe_mac_X540: - dv_id = IXGBE_LOW_DV_X540(tc); - break; - default: - dv_id = IXGBE_LOW_DV(tc); - break; - } - - /* Delay value is calculated in bit times convert to KB */ - return IXGBE_BT2KB(dv_id); -} - -/* - * ixgbe_pbthresh_setup - calculate and setup high low water marks - */ -static void ixgbe_pbthresh_setup(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - int num_tc = netdev_get_num_tc(adapter->netdev); - int i; - - if (!num_tc) - num_tc = 1; - - hw->fc.low_water = ixgbe_lpbthresh(adapter); - - for (i = 0; i < num_tc; i++) { - hw->fc.high_water[i] = ixgbe_hpbthresh(adapter, i); - - /* Low water marks must not be larger than high water marks */ - if (hw->fc.low_water > hw->fc.high_water[i]) - hw->fc.low_water = 0; - } -} - -static void ixgbe_configure_pb(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - int hdrm; - u8 tc = netdev_get_num_tc(adapter->netdev); - - if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE || - adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) - hdrm = 32 << adapter->fdir_pballoc; - else - hdrm = 0; - - hw->mac.ops.set_rxpba(hw, tc, hdrm, PBA_STRATEGY_EQUAL); - ixgbe_pbthresh_setup(adapter); -} - -static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - struct hlist_node *node, *node2; - struct ixgbe_fdir_filter *filter; - - spin_lock(&adapter->fdir_perfect_lock); - - if (!hlist_empty(&adapter->fdir_filter_list)) - ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask); - - hlist_for_each_entry_safe(filter, node, node2, - &adapter->fdir_filter_list, fdir_node) { - ixgbe_fdir_write_perfect_filter_82599(hw, - &filter->filter, - filter->sw_idx, - (filter->action == IXGBE_FDIR_DROP_QUEUE) ? - IXGBE_FDIR_DROP_QUEUE : - adapter->rx_ring[filter->action]->reg_idx); - } - - spin_unlock(&adapter->fdir_perfect_lock); -} - -static void ixgbe_configure(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - - ixgbe_configure_pb(adapter); -#ifdef CONFIG_IXGBE_DCB - ixgbe_configure_dcb(adapter); -#endif - - ixgbe_set_rx_mode(adapter->netdev); - ixgbe_restore_vlan(adapter); - -#ifdef IXGBE_FCOE - if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) - ixgbe_configure_fcoe(adapter); - -#endif /* IXGBE_FCOE */ - - switch (hw->mac.type) { - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - hw->mac.ops.disable_rx_buff(hw); - break; - default: - break; - } - - if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) { - ixgbe_init_fdir_signature_82599(&adapter->hw, - adapter->fdir_pballoc); - } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) { - ixgbe_init_fdir_perfect_82599(&adapter->hw, - adapter->fdir_pballoc); - ixgbe_fdir_filter_restore(adapter); - } - - switch (hw->mac.type) { - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - hw->mac.ops.enable_rx_buff(hw); - break; - default: - break; - } - - ixgbe_configure_virtualization(adapter); - - ixgbe_configure_tx(adapter); - ixgbe_configure_rx(adapter); -} - -static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw) -{ - switch (hw->phy.type) { - case ixgbe_phy_sfp_avago: - case ixgbe_phy_sfp_ftl: - case ixgbe_phy_sfp_intel: - case ixgbe_phy_sfp_unknown: - case ixgbe_phy_sfp_passive_tyco: - case ixgbe_phy_sfp_passive_unknown: - case ixgbe_phy_sfp_active_unknown: - case ixgbe_phy_sfp_ftl_active: - return true; - case ixgbe_phy_nl: - if (hw->mac.type == ixgbe_mac_82598EB) - return true; - default: - return false; - } -} - -/** - * ixgbe_sfp_link_config - set up SFP+ link - * @adapter: pointer to private adapter struct - **/ -static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter) -{ - /* - * We are assuming the worst case scenario here, and that - * is that an SFP was inserted/removed after the reset - * but before SFP detection was enabled. As such the best - * solution is to just start searching as soon as we start - */ - if (adapter->hw.mac.type == ixgbe_mac_82598EB) - adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP; - - adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET; -} - -/** - * ixgbe_non_sfp_link_config - set up non-SFP+ link - * @hw: pointer to private hardware struct - * - * Returns 0 on success, negative on failure - **/ -static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw) -{ - u32 autoneg; - bool negotiation, link_up = false; - u32 ret = IXGBE_ERR_LINK_SETUP; - - if (hw->mac.ops.check_link) - ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false); - - if (ret) - goto link_cfg_out; - - autoneg = hw->phy.autoneg_advertised; - if ((!autoneg) && (hw->mac.ops.get_link_capabilities)) - ret = hw->mac.ops.get_link_capabilities(hw, &autoneg, - &negotiation); - if (ret) - goto link_cfg_out; - - if (hw->mac.ops.setup_link) - ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up); -link_cfg_out: - return ret; -} - -static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 gpie = 0; - - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { - gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT | - IXGBE_GPIE_OCD; - gpie |= IXGBE_GPIE_EIAME; - /* - * use EIAM to auto-mask when MSI-X interrupt is asserted - * this saves a register write for every interrupt - */ - switch (hw->mac.type) { - case ixgbe_mac_82598EB: - IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE); - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - default: - IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF); - IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF); - break; - } - } else { - /* legacy interrupts, use EIAM to auto-mask when reading EICR, - * specifically only auto mask tx and rx interrupts */ - IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE); - } - - /* XXX: to interrupt immediately for EICS writes, enable this */ - /* gpie |= IXGBE_GPIE_EIMEN; */ - - if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { - gpie &= ~IXGBE_GPIE_VTMODE_MASK; - gpie |= IXGBE_GPIE_VTMODE_64; - } - - /* Enable Thermal over heat sensor interrupt */ - if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) { - switch (adapter->hw.mac.type) { - case ixgbe_mac_82599EB: - gpie |= IXGBE_SDP0_GPIEN; - break; - case ixgbe_mac_X540: - gpie |= IXGBE_EIMS_TS; - break; - default: - break; - } - } - - /* Enable fan failure interrupt */ - if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) - gpie |= IXGBE_SDP1_GPIEN; - - if (hw->mac.type == ixgbe_mac_82599EB) { - gpie |= IXGBE_SDP1_GPIEN; - gpie |= IXGBE_SDP2_GPIEN; - } - - IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie); -} - -static void ixgbe_up_complete(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - int err; - u32 ctrl_ext; - - ixgbe_get_hw_control(adapter); - ixgbe_setup_gpie(adapter); - - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) - ixgbe_configure_msix(adapter); - else - ixgbe_configure_msi_and_legacy(adapter); - - /* enable the optics for both mult-speed fiber and 82599 SFP+ fiber */ - if (hw->mac.ops.enable_tx_laser && - ((hw->phy.multispeed_fiber) || - ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) && - (hw->mac.type == ixgbe_mac_82599EB)))) - hw->mac.ops.enable_tx_laser(hw); - - clear_bit(__IXGBE_DOWN, &adapter->state); - ixgbe_napi_enable_all(adapter); - - if (ixgbe_is_sfp(hw)) { - ixgbe_sfp_link_config(adapter); - } else { - err = ixgbe_non_sfp_link_config(hw); - if (err) - e_err(probe, "link_config FAILED %d\n", err); - } - - /* clear any pending interrupts, may auto mask */ - IXGBE_READ_REG(hw, IXGBE_EICR); - ixgbe_irq_enable(adapter, true, true); - - /* - * If this adapter has a fan, check to see if we had a failure - * before we enabled the interrupt. - */ - if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) { - u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP); - if (esdp & IXGBE_ESDP_SDP1) - e_crit(drv, "Fan has stopped, replace the adapter\n"); - } - - /* enable transmits */ - netif_tx_start_all_queues(adapter->netdev); - - /* bring the link up in the watchdog, this could race with our first - * link up interrupt but shouldn't be a problem */ - adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE; - adapter->link_check_timeout = jiffies; - mod_timer(&adapter->service_timer, jiffies); - - /* Set PF Reset Done bit so PF/VF Mail Ops can work */ - ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT); - ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD; - IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext); -} - -void ixgbe_reinit_locked(struct ixgbe_adapter *adapter) -{ - WARN_ON(in_interrupt()); - /* put off any impending NetWatchDogTimeout */ - adapter->netdev->trans_start = jiffies; - - while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state)) - usleep_range(1000, 2000); - ixgbe_down(adapter); - /* - * If SR-IOV enabled then wait a bit before bringing the adapter - * back up to give the VFs time to respond to the reset. The - * two second wait is based upon the watchdog timer cycle in - * the VF driver. - */ - if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) - msleep(2000); - ixgbe_up(adapter); - clear_bit(__IXGBE_RESETTING, &adapter->state); -} - -void ixgbe_up(struct ixgbe_adapter *adapter) -{ - /* hardware has been reset, we need to reload some things */ - ixgbe_configure(adapter); - - ixgbe_up_complete(adapter); -} - -void ixgbe_reset(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - int err; - - /* lock SFP init bit to prevent race conditions with the watchdog */ - while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state)) - usleep_range(1000, 2000); - - /* clear all SFP and link config related flags while holding SFP_INIT */ - adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP | - IXGBE_FLAG2_SFP_NEEDS_RESET); - adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG; - - err = hw->mac.ops.init_hw(hw); - switch (err) { - case 0: - case IXGBE_ERR_SFP_NOT_PRESENT: - case IXGBE_ERR_SFP_NOT_SUPPORTED: - break; - case IXGBE_ERR_MASTER_REQUESTS_PENDING: - e_dev_err("master disable timed out\n"); - break; - case IXGBE_ERR_EEPROM_VERSION: - /* We are running on a pre-production device, log a warning */ - e_dev_warn("This device is a pre-production adapter/LOM. " - "Please be aware there may be issues associated with " - "your hardware. If you are experiencing problems " - "please contact your Intel or hardware " - "representative who provided you with this " - "hardware.\n"); - break; - default: - e_dev_err("Hardware Error: %d\n", err); - } - - clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state); - - /* reprogram the RAR[0] in case user changed it. */ - hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs, - IXGBE_RAH_AV); -} - -/** - * ixgbe_init_rx_page_offset - initialize page offset values for Rx buffers - * @rx_ring: ring to setup - * - * On many IA platforms the L1 cache has a critical stride of 4K, this - * results in each receive buffer starting in the same cache set. To help - * reduce the pressure on this cache set we can interleave the offsets so - * that only every other buffer will be in the same cache set. - **/ -static void ixgbe_init_rx_page_offset(struct ixgbe_ring *rx_ring) -{ - struct ixgbe_rx_buffer *rx_buffer = rx_ring->rx_buffer_info; - u16 i; - - for (i = 0; i < rx_ring->count; i += 2) { - rx_buffer[0].page_offset = 0; - rx_buffer[1].page_offset = ixgbe_rx_bufsz(rx_ring); - rx_buffer = &rx_buffer[2]; - } -} - -/** - * ixgbe_clean_rx_ring - Free Rx Buffers per Queue - * @rx_ring: ring to free buffers from - **/ -static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring) -{ - struct device *dev = rx_ring->dev; - unsigned long size; - u16 i; - - /* ring already cleared, nothing to do */ - if (!rx_ring->rx_buffer_info) - return; - - /* Free all the Rx ring sk_buffs */ - for (i = 0; i < rx_ring->count; i++) { - struct ixgbe_rx_buffer *rx_buffer; - - rx_buffer = &rx_ring->rx_buffer_info[i]; - if (rx_buffer->skb) { - struct sk_buff *skb = rx_buffer->skb; - if (IXGBE_CB(skb)->page_released) { - dma_unmap_page(dev, - IXGBE_CB(skb)->dma, - ixgbe_rx_bufsz(rx_ring), - DMA_FROM_DEVICE); - IXGBE_CB(skb)->page_released = false; - } - dev_kfree_skb(skb); - } - rx_buffer->skb = NULL; - if (rx_buffer->dma) - dma_unmap_page(dev, rx_buffer->dma, - ixgbe_rx_pg_size(rx_ring), - DMA_FROM_DEVICE); - rx_buffer->dma = 0; - if (rx_buffer->page) - put_page(rx_buffer->page); - rx_buffer->page = NULL; - } - - size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count; - memset(rx_ring->rx_buffer_info, 0, size); - - ixgbe_init_rx_page_offset(rx_ring); - - /* Zero out the descriptor ring */ - memset(rx_ring->desc, 0, rx_ring->size); - - rx_ring->next_to_alloc = 0; - rx_ring->next_to_clean = 0; - rx_ring->next_to_use = 0; -} - -/** - * ixgbe_clean_tx_ring - Free Tx Buffers - * @tx_ring: ring to be cleaned - **/ -static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring) -{ - struct ixgbe_tx_buffer *tx_buffer_info; - unsigned long size; - u16 i; - - /* ring already cleared, nothing to do */ - if (!tx_ring->tx_buffer_info) - return; - - /* Free all the Tx ring sk_buffs */ - for (i = 0; i < tx_ring->count; i++) { - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info); - } - - netdev_tx_reset_queue(txring_txq(tx_ring)); - - size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count; - memset(tx_ring->tx_buffer_info, 0, size); - - /* Zero out the descriptor ring */ - memset(tx_ring->desc, 0, tx_ring->size); - - tx_ring->next_to_use = 0; - tx_ring->next_to_clean = 0; -} - -/** - * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues - * @adapter: board private structure - **/ -static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_rx_queues; i++) - ixgbe_clean_rx_ring(adapter->rx_ring[i]); -} - -/** - * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues - * @adapter: board private structure - **/ -static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_tx_queues; i++) - ixgbe_clean_tx_ring(adapter->tx_ring[i]); -} - -static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter) -{ - struct hlist_node *node, *node2; - struct ixgbe_fdir_filter *filter; - - spin_lock(&adapter->fdir_perfect_lock); - - hlist_for_each_entry_safe(filter, node, node2, - &adapter->fdir_filter_list, fdir_node) { - hlist_del(&filter->fdir_node); - kfree(filter); - } - adapter->fdir_filter_count = 0; - - spin_unlock(&adapter->fdir_perfect_lock); -} - -void ixgbe_down(struct ixgbe_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - struct ixgbe_hw *hw = &adapter->hw; - u32 rxctrl; - int i; - - /* signal that we are down to the interrupt handler */ - set_bit(__IXGBE_DOWN, &adapter->state); - - /* disable receives */ - rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL); - IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN); - - /* disable all enabled rx queues */ - for (i = 0; i < adapter->num_rx_queues; i++) - /* this call also flushes the previous write */ - ixgbe_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); - - ixgbe_irq_disable(adapter); - - ixgbe_napi_disable_all(adapter); - - adapter->flags2 &= ~(IXGBE_FLAG2_FDIR_REQUIRES_REINIT | - IXGBE_FLAG2_RESET_REQUESTED); - adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE; - - del_timer_sync(&adapter->service_timer); - - if (adapter->num_vfs) { - /* Clear EITR Select mapping */ - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0); - - /* Mark all the VFs as inactive */ - for (i = 0 ; i < adapter->num_vfs; i++) - adapter->vfinfo[i].clear_to_send = false; - - /* ping all the active vfs to let them know we are going down */ - ixgbe_ping_all_vfs(adapter); - - /* Disable all VFTE/VFRE TX/RX */ - ixgbe_disable_tx_rx(adapter); - } - - /* 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_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH); - } - - /* Disable the Tx DMA engine on 82599 and X540 */ - switch (hw->mac.type) { - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, - (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) & - ~IXGBE_DMATXCTL_TE)); - break; - default: - break; - } - - if (!pci_channel_offline(adapter->pdev)) - ixgbe_reset(adapter); - - /* power down the optics for multispeed fiber and 82599 SFP+ fiber */ - if (hw->mac.ops.disable_tx_laser && - ((hw->phy.multispeed_fiber) || - ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) && - (hw->mac.type == ixgbe_mac_82599EB)))) - hw->mac.ops.disable_tx_laser(hw); - - ixgbe_clean_all_tx_rings(adapter); - ixgbe_clean_all_rx_rings(adapter); - -#ifdef CONFIG_IXGBE_DCA - /* since we reset the hardware DCA settings were cleared */ - ixgbe_setup_dca(adapter); -#endif -} - -/** - * ixgbe_tx_timeout - Respond to a Tx Hang - * @netdev: network interface device structure - **/ -static void ixgbe_tx_timeout(struct net_device *netdev) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - - /* Do the reset outside of interrupt context */ - ixgbe_tx_timeout_reset(adapter); -} - -/** - * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter) - * @adapter: board private structure to initialize - * - * ixgbe_sw_init initializes the Adapter private data structure. - * Fields are initialized based on PCI device information and - * OS network device settings (MTU size). - **/ -static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - struct pci_dev *pdev = adapter->pdev; - unsigned int rss; -#ifdef CONFIG_IXGBE_DCB - int j; - struct tc_configuration *tc; -#endif - - /* 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; - - /* Set capability flags */ - rss = min_t(int, IXGBE_MAX_RSS_INDICES, num_online_cpus()); - adapter->ring_feature[RING_F_RSS].indices = rss; - adapter->flags |= IXGBE_FLAG_RSS_ENABLED; - switch (hw->mac.type) { - case ixgbe_mac_82598EB: - if (hw->device_id == IXGBE_DEV_ID_82598AT) - adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE; - adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598; - break; - case ixgbe_mac_X540: - adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE; - case ixgbe_mac_82599EB: - adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599; - adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE; - adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED; - if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM) - adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE; - /* Flow Director hash filters enabled */ - adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE; - adapter->atr_sample_rate = 20; - adapter->ring_feature[RING_F_FDIR].indices = - IXGBE_MAX_FDIR_INDICES; - adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K; -#ifdef IXGBE_FCOE - adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE; - adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED; - adapter->ring_feature[RING_F_FCOE].indices = 0; -#ifdef CONFIG_IXGBE_DCB - /* Default traffic class to use for FCoE */ - adapter->fcoe.up = IXGBE_FCOE_DEFTC; -#endif -#endif /* IXGBE_FCOE */ - break; - default: - break; - } - - /* n-tuple support exists, always init our spinlock */ - spin_lock_init(&adapter->fdir_perfect_lock); - -#ifdef CONFIG_IXGBE_DCB - switch (hw->mac.type) { - case ixgbe_mac_X540: - adapter->dcb_cfg.num_tcs.pg_tcs = X540_TRAFFIC_CLASS; - adapter->dcb_cfg.num_tcs.pfc_tcs = X540_TRAFFIC_CLASS; - break; - default: - adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS; - adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS; - break; - } - - /* Configure DCB traffic classes */ - for (j = 0; j < MAX_TRAFFIC_CLASS; j++) { - tc = &adapter->dcb_cfg.tc_config[j]; - tc->path[DCB_TX_CONFIG].bwg_id = 0; - tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1); - tc->path[DCB_RX_CONFIG].bwg_id = 0; - tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1); - tc->dcb_pfc = pfc_disabled; - } - - /* Initialize default user to priority mapping, UPx->TC0 */ - tc = &adapter->dcb_cfg.tc_config[0]; - tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF; - tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF; - - adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100; - adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100; - adapter->dcb_cfg.pfc_mode_enable = false; - adapter->dcb_set_bitmap = 0x00; - adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE; - memcpy(&adapter->temp_dcb_cfg, &adapter->dcb_cfg, - sizeof(adapter->temp_dcb_cfg)); - -#endif - - /* default flow control settings */ - hw->fc.requested_mode = ixgbe_fc_full; - hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */ -#ifdef CONFIG_DCB - adapter->last_lfc_mode = hw->fc.current_mode; -#endif - ixgbe_pbthresh_setup(adapter); - hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE; - hw->fc.send_xon = true; - hw->fc.disable_fc_autoneg = false; - - /* enable itr by default in dynamic mode */ - adapter->rx_itr_setting = 1; - adapter->tx_itr_setting = 1; - - /* set default ring sizes */ - adapter->tx_ring_count = IXGBE_DEFAULT_TXD; - adapter->rx_ring_count = IXGBE_DEFAULT_RXD; - - /* set default work limits */ - adapter->tx_work_limit = IXGBE_DEFAULT_TX_WORK; - - /* initialize eeprom parameters */ - if (ixgbe_init_eeprom_params_generic(hw)) { - e_dev_err("EEPROM initialization failed\n"); - return -EIO; - } - - set_bit(__IXGBE_DOWN, &adapter->state); - - return 0; -} - -/** - * ixgbe_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 ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring) -{ - struct device *dev = tx_ring->dev; - int orig_node = dev_to_node(dev); - int numa_node = -1; - int size; - - size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count; - - if (tx_ring->q_vector) - numa_node = tx_ring->q_vector->numa_node; - - tx_ring->tx_buffer_info = vzalloc_node(size, numa_node); - if (!tx_ring->tx_buffer_info) - tx_ring->tx_buffer_info = vzalloc(size); - if (!tx_ring->tx_buffer_info) - goto err; - - /* 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); - - set_dev_node(dev, numa_node); - tx_ring->desc = dma_alloc_coherent(dev, - tx_ring->size, - &tx_ring->dma, - GFP_KERNEL); - set_dev_node(dev, orig_node); - if (!tx_ring->desc) - tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size, - &tx_ring->dma, GFP_KERNEL); - if (!tx_ring->desc) - goto err; - - tx_ring->next_to_use = 0; - tx_ring->next_to_clean = 0; - return 0; - -err: - vfree(tx_ring->tx_buffer_info); - tx_ring->tx_buffer_info = NULL; - dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n"); - return -ENOMEM; -} - -/** - * ixgbe_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 ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter) -{ - int i, err = 0; - - for (i = 0; i < adapter->num_tx_queues; i++) { - err = ixgbe_setup_tx_resources(adapter->tx_ring[i]); - if (!err) - continue; - e_err(probe, "Allocation for Tx Queue %u failed\n", i); - break; - } - - return err; -} - -/** - * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors) - * @rx_ring: rx descriptor ring (for a specific queue) to setup - * - * Returns 0 on success, negative on failure - **/ -int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring) -{ - struct device *dev = rx_ring->dev; - int orig_node = dev_to_node(dev); - int numa_node = -1; - int size; - - size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count; - - if (rx_ring->q_vector) - numa_node = rx_ring->q_vector->numa_node; - - rx_ring->rx_buffer_info = vzalloc_node(size, numa_node); - if (!rx_ring->rx_buffer_info) - rx_ring->rx_buffer_info = vzalloc(size); - if (!rx_ring->rx_buffer_info) - goto err; - - /* 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); - - set_dev_node(dev, numa_node); - rx_ring->desc = dma_alloc_coherent(dev, - rx_ring->size, - &rx_ring->dma, - GFP_KERNEL); - set_dev_node(dev, orig_node); - if (!rx_ring->desc) - rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size, - &rx_ring->dma, GFP_KERNEL); - if (!rx_ring->desc) - goto err; - - rx_ring->next_to_clean = 0; - rx_ring->next_to_use = 0; - - ixgbe_init_rx_page_offset(rx_ring); - - return 0; -err: - vfree(rx_ring->rx_buffer_info); - rx_ring->rx_buffer_info = NULL; - dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n"); - return -ENOMEM; -} - -/** - * ixgbe_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 ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter) -{ - int i, err = 0; - - for (i = 0; i < adapter->num_rx_queues; i++) { - err = ixgbe_setup_rx_resources(adapter->rx_ring[i]); - if (!err) - continue; - e_err(probe, "Allocation for Rx Queue %u failed\n", i); - break; - } - - return err; -} - -/** - * ixgbe_free_tx_resources - Free Tx Resources per Queue - * @tx_ring: Tx descriptor ring for a specific queue - * - * Free all transmit software resources - **/ -void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring) -{ - ixgbe_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; -} - -/** - * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues - * @adapter: board private structure - * - * Free all transmit software resources - **/ -static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_tx_queues; i++) - if (adapter->tx_ring[i]->desc) - ixgbe_free_tx_resources(adapter->tx_ring[i]); -} - -/** - * ixgbe_free_rx_resources - Free Rx Resources - * @rx_ring: ring to clean the resources from - * - * Free all receive software resources - **/ -void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring) -{ - ixgbe_clean_rx_ring(rx_ring); - - vfree(rx_ring->rx_buffer_info); - rx_ring->rx_buffer_info = NULL; - - /* if not set, then don't free */ - if (!rx_ring->desc) - return; - - dma_free_coherent(rx_ring->dev, rx_ring->size, - rx_ring->desc, rx_ring->dma); - - rx_ring->desc = NULL; -} - -/** - * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues - * @adapter: board private structure - * - * Free all receive software resources - **/ -static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_rx_queues; i++) - if (adapter->rx_ring[i]->desc) - ixgbe_free_rx_resources(adapter->rx_ring[i]); -} - -/** - * ixgbe_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 ixgbe_change_mtu(struct net_device *netdev, int new_mtu) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; - - /* MTU < 68 is an error and causes problems on some kernels */ - if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE)) - return -EINVAL; - - /* - * For 82599EB we cannot allow PF to change MTU greater than 1500 - * in SR-IOV mode as it may cause buffer overruns in guest VFs that - * don't allocate and chain buffers correctly. - */ - if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) && - (adapter->hw.mac.type == ixgbe_mac_82599EB) && - (max_frame > MAXIMUM_ETHERNET_VLAN_SIZE)) - return -EINVAL; - - e_info(probe, "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)) - ixgbe_reinit_locked(adapter); - - return 0; -} - -/** - * ixgbe_open - Called when a network interface is made active - * @netdev: network interface device structure - * - * Returns 0 on success, negative value on failure - * - * The open entry point is called when a network interface is made - * active by the system (IFF_UP). At this point all resources needed - * for transmit and receive operations are allocated, the interrupt - * handler is registered with the OS, the watchdog timer is started, - * and the stack is notified that the interface is ready. - **/ -static int ixgbe_open(struct net_device *netdev) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - int err; - - /* disallow open during test */ - if (test_bit(__IXGBE_TESTING, &adapter->state)) - return -EBUSY; - - netif_carrier_off(netdev); - - /* allocate transmit descriptors */ - err = ixgbe_setup_all_tx_resources(adapter); - if (err) - goto err_setup_tx; - - /* allocate receive descriptors */ - err = ixgbe_setup_all_rx_resources(adapter); - if (err) - goto err_setup_rx; - - ixgbe_configure(adapter); - - err = ixgbe_request_irq(adapter); - if (err) - goto err_req_irq; - - ixgbe_up_complete(adapter); - - return 0; - -err_req_irq: -err_setup_rx: - ixgbe_free_all_rx_resources(adapter); -err_setup_tx: - ixgbe_free_all_tx_resources(adapter); - ixgbe_reset(adapter); - - return err; -} - -/** - * ixgbe_close - Disables a network interface - * @netdev: network interface device structure - * - * Returns 0, this is not allowed to fail - * - * The close entry point is called when an interface is de-activated - * by the OS. The hardware is still under the drivers control, but - * needs to be disabled. A global MAC reset is issued to stop the - * hardware, and all transmit and receive resources are freed. - **/ -static int ixgbe_close(struct net_device *netdev) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - - ixgbe_down(adapter); - ixgbe_free_irq(adapter); - - ixgbe_fdir_filter_exit(adapter); - - ixgbe_free_all_tx_resources(adapter); - ixgbe_free_all_rx_resources(adapter); - - ixgbe_release_hw_control(adapter); - - return 0; -} - -#ifdef CONFIG_PM -static int ixgbe_resume(struct pci_dev *pdev) -{ - struct ixgbe_adapter *adapter = pci_get_drvdata(pdev); - struct net_device *netdev = adapter->netdev; - u32 err; - - pci_set_power_state(pdev, PCI_D0); - 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) { - e_dev_err("Cannot enable PCI device from suspend\n"); - return err; - } - pci_set_master(pdev); - - pci_wake_from_d3(pdev, false); - - rtnl_lock(); - err = ixgbe_init_interrupt_scheme(adapter); - rtnl_unlock(); - if (err) { - e_dev_err("Cannot initialize interrupts for device\n"); - return err; - } - - ixgbe_reset(adapter); - - IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0); - - if (netif_running(netdev)) { - err = ixgbe_open(netdev); - if (err) - return err; - } - - netif_device_attach(netdev); - - return 0; -} -#endif /* CONFIG_PM */ - -static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake) -{ - struct ixgbe_adapter *adapter = pci_get_drvdata(pdev); - struct net_device *netdev = adapter->netdev; - struct ixgbe_hw *hw = &adapter->hw; - u32 ctrl, fctrl; - u32 wufc = adapter->wol; -#ifdef CONFIG_PM - int retval = 0; -#endif - - netif_device_detach(netdev); - - if (netif_running(netdev)) { - rtnl_lock(); - ixgbe_down(adapter); - ixgbe_free_irq(adapter); - ixgbe_free_all_tx_resources(adapter); - ixgbe_free_all_rx_resources(adapter); - rtnl_unlock(); - } - - ixgbe_clear_interrupt_scheme(adapter); - -#ifdef CONFIG_PM - retval = pci_save_state(pdev); - if (retval) - return retval; - -#endif - if (wufc) { - ixgbe_set_rx_mode(netdev); - - /* - * enable the optics for both mult-speed fiber and - * 82599 SFP+ fiber as we can WoL. - */ - if (hw->mac.ops.enable_tx_laser && - (hw->phy.multispeed_fiber || - (hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber && - hw->mac.type == ixgbe_mac_82599EB))) - hw->mac.ops.enable_tx_laser(hw); - - /* turn on all-multi mode if wake on multicast is enabled */ - if (wufc & IXGBE_WUFC_MC) { - fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL); - fctrl |= IXGBE_FCTRL_MPE; - IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl); - } - - ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL); - ctrl |= IXGBE_CTRL_GIO_DIS; - IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl); - - IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc); - } else { - IXGBE_WRITE_REG(hw, IXGBE_WUC, 0); - IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0); - } - - switch (hw->mac.type) { - case ixgbe_mac_82598EB: - pci_wake_from_d3(pdev, false); - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - pci_wake_from_d3(pdev, !!wufc); - break; - default: - break; - } - - *enable_wake = !!wufc; - - ixgbe_release_hw_control(adapter); - - pci_disable_device(pdev); - - return 0; -} - -#ifdef CONFIG_PM -static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state) -{ - int retval; - bool wake; - - retval = __ixgbe_shutdown(pdev, &wake); - if (retval) - return retval; - - if (wake) { - pci_prepare_to_sleep(pdev); - } else { - pci_wake_from_d3(pdev, false); - pci_set_power_state(pdev, PCI_D3hot); - } - - return 0; -} -#endif /* CONFIG_PM */ - -static void ixgbe_shutdown(struct pci_dev *pdev) -{ - bool wake; - - __ixgbe_shutdown(pdev, &wake); - - if (system_state == SYSTEM_POWER_OFF) { - pci_wake_from_d3(pdev, wake); - pci_set_power_state(pdev, PCI_D3hot); - } -} - -/** - * ixgbe_update_stats - Update the board statistics counters. - * @adapter: board private structure - **/ -void ixgbe_update_stats(struct ixgbe_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - struct ixgbe_hw *hw = &adapter->hw; - struct ixgbe_hw_stats *hwstats = &adapter->stats; - u64 total_mpc = 0; - u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot; - u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0; - u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0; - u64 bytes = 0, packets = 0, hw_csum_rx_error = 0; -#ifdef IXGBE_FCOE - struct ixgbe_fcoe *fcoe = &adapter->fcoe; - unsigned int cpu; - u64 fcoe_noddp_counts_sum = 0, fcoe_noddp_ext_buff_counts_sum = 0; -#endif /* IXGBE_FCOE */ - - if (test_bit(__IXGBE_DOWN, &adapter->state) || - test_bit(__IXGBE_RESETTING, &adapter->state)) - return; - - if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) { - u64 rsc_count = 0; - u64 rsc_flush = 0; - for (i = 0; i < 16; i++) - adapter->hw_rx_no_dma_resources += - IXGBE_READ_REG(hw, IXGBE_QPRDC(i)); - for (i = 0; i < adapter->num_rx_queues; i++) { - rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count; - rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush; - } - adapter->rsc_total_count = rsc_count; - adapter->rsc_total_flush = rsc_flush; - } - - for (i = 0; i < adapter->num_rx_queues; i++) { - struct ixgbe_ring *rx_ring = adapter->rx_ring[i]; - non_eop_descs += rx_ring->rx_stats.non_eop_descs; - alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed; - alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed; - hw_csum_rx_error += rx_ring->rx_stats.csum_err; - bytes += rx_ring->stats.bytes; - packets += rx_ring->stats.packets; - } - adapter->non_eop_descs = non_eop_descs; - adapter->alloc_rx_page_failed = alloc_rx_page_failed; - adapter->alloc_rx_buff_failed = alloc_rx_buff_failed; - adapter->hw_csum_rx_error = hw_csum_rx_error; - netdev->stats.rx_bytes = bytes; - netdev->stats.rx_packets = packets; - - bytes = 0; - packets = 0; - /* gather some stats to the adapter struct that are per queue */ - for (i = 0; i < adapter->num_tx_queues; i++) { - struct ixgbe_ring *tx_ring = adapter->tx_ring[i]; - restart_queue += tx_ring->tx_stats.restart_queue; - tx_busy += tx_ring->tx_stats.tx_busy; - bytes += tx_ring->stats.bytes; - packets += tx_ring->stats.packets; - } - adapter->restart_queue = restart_queue; - adapter->tx_busy = tx_busy; - netdev->stats.tx_bytes = bytes; - netdev->stats.tx_packets = packets; - - hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS); - - /* 8 register reads */ - for (i = 0; i < 8; i++) { - /* for packet buffers not used, the register should read 0 */ - mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i)); - missed_rx += mpc; - hwstats->mpc[i] += mpc; - total_mpc += hwstats->mpc[i]; - hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i)); - hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i)); - switch (hw->mac.type) { - case ixgbe_mac_82598EB: - hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i)); - hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i)); - hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i)); - hwstats->pxonrxc[i] += - IXGBE_READ_REG(hw, IXGBE_PXONRXC(i)); - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - hwstats->pxonrxc[i] += - IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i)); - break; - default: - break; - } - } - - /*16 register reads */ - for (i = 0; i < 16; i++) { - hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i)); - hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i)); - if ((hw->mac.type == ixgbe_mac_82599EB) || - (hw->mac.type == ixgbe_mac_X540)) { - hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(i)); - IXGBE_READ_REG(hw, IXGBE_QBTC_H(i)); /* to clear */ - hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(i)); - IXGBE_READ_REG(hw, IXGBE_QBRC_H(i)); /* to clear */ - } - } - - hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC); - /* work around hardware counting issue */ - hwstats->gprc -= missed_rx; - - ixgbe_update_xoff_received(adapter); - - /* 82598 hardware only has a 32 bit counter in the high register */ - switch (hw->mac.type) { - case ixgbe_mac_82598EB: - hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC); - hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH); - hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH); - hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH); - break; - case ixgbe_mac_X540: - /* OS2BMC stats are X540 only*/ - hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC); - hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC); - hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC); - hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC); - case ixgbe_mac_82599EB: - hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL); - IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */ - hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL); - IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */ - hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL); - IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */ - hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT); - hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH); - hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS); -#ifdef IXGBE_FCOE - hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC); - hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC); - hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC); - hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC); - hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC); - hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC); - /* Add up per cpu counters for total ddp aloc fail */ - if (fcoe->pcpu_noddp && fcoe->pcpu_noddp_ext_buff) { - for_each_possible_cpu(cpu) { - fcoe_noddp_counts_sum += - *per_cpu_ptr(fcoe->pcpu_noddp, cpu); - fcoe_noddp_ext_buff_counts_sum += - *per_cpu_ptr(fcoe-> - pcpu_noddp_ext_buff, cpu); - } - } - hwstats->fcoe_noddp = fcoe_noddp_counts_sum; - hwstats->fcoe_noddp_ext_buff = fcoe_noddp_ext_buff_counts_sum; -#endif /* IXGBE_FCOE */ - break; - default: - break; - } - bprc = IXGBE_READ_REG(hw, IXGBE_BPRC); - hwstats->bprc += bprc; - hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC); - if (hw->mac.type == ixgbe_mac_82598EB) - hwstats->mprc -= bprc; - hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC); - hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64); - hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127); - hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255); - hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511); - hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023); - hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522); - hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC); - lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC); - hwstats->lxontxc += lxon; - lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC); - hwstats->lxofftxc += lxoff; - hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC); - hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC); - /* - * 82598 errata - tx of flow control packets is included in tx counters - */ - xon_off_tot = lxon + lxoff; - hwstats->gptc -= xon_off_tot; - hwstats->mptc -= xon_off_tot; - hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN)); - hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC); - hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC); - hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC); - hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR); - hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64); - hwstats->ptc64 -= xon_off_tot; - hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127); - hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255); - hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511); - hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023); - hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522); - hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC); - - /* Fill out the OS statistics structure */ - netdev->stats.multicast = hwstats->mprc; - - /* Rx Errors */ - netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec; - netdev->stats.rx_dropped = 0; - netdev->stats.rx_length_errors = hwstats->rlec; - netdev->stats.rx_crc_errors = hwstats->crcerrs; - netdev->stats.rx_missed_errors = total_mpc; -} - -/** - * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table - * @adapter - pointer to the device adapter structure - **/ -static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - int i; - - if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT)) - return; - - adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT; - - /* if interface is down do nothing */ - if (test_bit(__IXGBE_DOWN, &adapter->state)) - return; - - /* do nothing if we are not using signature filters */ - if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)) - return; - - adapter->fdir_overflow++; - - if (ixgbe_reinit_fdir_tables_82599(hw) == 0) { - for (i = 0; i < adapter->num_tx_queues; i++) - set_bit(__IXGBE_TX_FDIR_INIT_DONE, - &(adapter->tx_ring[i]->state)); - /* re-enable flow director interrupts */ - IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR); - } else { - e_err(probe, "failed to finish FDIR re-initialization, " - "ignored adding FDIR ATR filters\n"); - } -} - -/** - * ixgbe_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 ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - u64 eics = 0; - int i; - - /* If we're down or resetting, just bail */ - if (test_bit(__IXGBE_DOWN, &adapter->state) || - test_bit(__IXGBE_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]); - } - - if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) { - /* - * for legacy and MSI interrupts don't set any bits - * that are enabled for EIAM, because this operation - * would set *both* EIMS and EICS for any bit in EIAM - */ - IXGBE_WRITE_REG(hw, IXGBE_EICS, - (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER)); - } else { - /* get one bit for every active tx/rx interrupt vector */ - for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) { - struct ixgbe_q_vector *qv = adapter->q_vector[i]; - if (qv->rx.ring || qv->tx.ring) - eics |= ((u64)1 << i); - } - } - - /* Cause software interrupt to ensure rings are cleaned */ - ixgbe_irq_rearm_queues(adapter, eics); - -} - -/** - * ixgbe_watchdog_update_link - update the link status - * @adapter - pointer to the device adapter structure - * @link_speed - pointer to a u32 to store the link_speed - **/ -static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 link_speed = adapter->link_speed; - bool link_up = adapter->link_up; - int i; - - if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)) - return; - - if (hw->mac.ops.check_link) { - hw->mac.ops.check_link(hw, &link_speed, &link_up, false); - } else { - /* always assume link is up, if no check link function */ - link_speed = IXGBE_LINK_SPEED_10GB_FULL; - link_up = true; - } - if (link_up) { - if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) { - for (i = 0; i < MAX_TRAFFIC_CLASS; i++) - hw->mac.ops.fc_enable(hw, i); - } else { - hw->mac.ops.fc_enable(hw, 0); - } - } - - if (link_up || - time_after(jiffies, (adapter->link_check_timeout + - IXGBE_TRY_LINK_TIMEOUT))) { - adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE; - IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC); - IXGBE_WRITE_FLUSH(hw); - } - - adapter->link_up = link_up; - adapter->link_speed = link_speed; -} - -/** - * ixgbe_watchdog_link_is_up - update netif_carrier status and - * print link up message - * @adapter - pointer to the device adapter structure - **/ -static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - struct ixgbe_hw *hw = &adapter->hw; - u32 link_speed = adapter->link_speed; - bool flow_rx, flow_tx; - - /* only continue if link was previously down */ - if (netif_carrier_ok(netdev)) - return; - - adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP; - - switch (hw->mac.type) { - case ixgbe_mac_82598EB: { - u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL); - u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS); - flow_rx = !!(frctl & IXGBE_FCTRL_RFCE); - flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X); - } - break; - case ixgbe_mac_X540: - case ixgbe_mac_82599EB: { - u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN); - u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG); - flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE); - flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X); - } - break; - default: - flow_tx = false; - flow_rx = false; - break; - } - e_info(drv, "NIC Link is Up %s, Flow Control: %s\n", - (link_speed == IXGBE_LINK_SPEED_10GB_FULL ? - "10 Gbps" : - (link_speed == IXGBE_LINK_SPEED_1GB_FULL ? - "1 Gbps" : - (link_speed == IXGBE_LINK_SPEED_100_FULL ? - "100 Mbps" : - "unknown speed"))), - ((flow_rx && flow_tx) ? "RX/TX" : - (flow_rx ? "RX" : - (flow_tx ? "TX" : "None")))); - - netif_carrier_on(netdev); - ixgbe_check_vf_rate_limit(adapter); -} - -/** - * ixgbe_watchdog_link_is_down - update netif_carrier status and - * print link down message - * @adapter - pointer to the adapter structure - **/ -static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - struct ixgbe_hw *hw = &adapter->hw; - - adapter->link_up = false; - adapter->link_speed = 0; - - /* only continue if link was up previously */ - if (!netif_carrier_ok(netdev)) - return; - - /* poll for SFP+ cable when link is down */ - if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB) - adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP; - - e_info(drv, "NIC Link is Down\n"); - netif_carrier_off(netdev); -} - -/** - * ixgbe_watchdog_flush_tx - flush queues on link down - * @adapter - pointer to the device adapter structure - **/ -static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter) -{ - int i; - int some_tx_pending = 0; - - if (!netif_carrier_ok(adapter->netdev)) { - for (i = 0; i < adapter->num_tx_queues; i++) { - struct ixgbe_ring *tx_ring = adapter->tx_ring[i]; - if (tx_ring->next_to_use != tx_ring->next_to_clean) { - some_tx_pending = 1; - break; - } - } - - if (some_tx_pending) { - /* We've lost link, so the controller stops DMA, - * but we've got queued Tx work that's never going - * to get done, so reset controller to flush Tx. - * (Do the reset outside of interrupt context). - */ - adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED; - } - } -} - -static void ixgbe_spoof_check(struct ixgbe_adapter *adapter) -{ - u32 ssvpc; - - /* Do not perform spoof check for 82598 */ - if (adapter->hw.mac.type == ixgbe_mac_82598EB) - return; - - ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC); - - /* - * ssvpc register is cleared on read, if zero then no - * spoofed packets in the last interval. - */ - if (!ssvpc) - return; - - e_warn(drv, "%d Spoofed packets detected\n", ssvpc); -} - -/** - * ixgbe_watchdog_subtask - check and bring link up - * @adapter - pointer to the device adapter structure - **/ -static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter) -{ - /* if interface is down do nothing */ - if (test_bit(__IXGBE_DOWN, &adapter->state) || - test_bit(__IXGBE_RESETTING, &adapter->state)) - return; - - ixgbe_watchdog_update_link(adapter); - - if (adapter->link_up) - ixgbe_watchdog_link_is_up(adapter); - else - ixgbe_watchdog_link_is_down(adapter); - - ixgbe_spoof_check(adapter); - ixgbe_update_stats(adapter); - - ixgbe_watchdog_flush_tx(adapter); -} - -/** - * ixgbe_sfp_detection_subtask - poll for SFP+ cable - * @adapter - the ixgbe adapter structure - **/ -static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - s32 err; - - /* not searching for SFP so there is nothing to do here */ - if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) && - !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET)) - return; - - /* someone else is in init, wait until next service event */ - if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state)) - return; - - err = hw->phy.ops.identify_sfp(hw); - if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) - goto sfp_out; - - if (err == IXGBE_ERR_SFP_NOT_PRESENT) { - /* If no cable is present, then we need to reset - * the next time we find a good cable. */ - adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET; - } - - /* exit on error */ - if (err) - goto sfp_out; - - /* exit if reset not needed */ - if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET)) - goto sfp_out; - - adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET; - - /* - * A module may be identified correctly, but the EEPROM may not have - * support for that module. setup_sfp() will fail in that case, so - * we should not allow that module to load. - */ - if (hw->mac.type == ixgbe_mac_82598EB) - err = hw->phy.ops.reset(hw); - else - err = hw->mac.ops.setup_sfp(hw); - - if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) - goto sfp_out; - - adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG; - e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type); - -sfp_out: - clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state); - - if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) && - (adapter->netdev->reg_state == NETREG_REGISTERED)) { - e_dev_err("failed to initialize because an unsupported " - "SFP+ module type was detected.\n"); - e_dev_err("Reload the driver after installing a " - "supported module.\n"); - unregister_netdev(adapter->netdev); - } -} - -/** - * ixgbe_sfp_link_config_subtask - set up link SFP after module install - * @adapter - the ixgbe adapter structure - **/ -static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 autoneg; - bool negotiation; - - if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG)) - return; - - /* someone else is in init, wait until next service event */ - if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state)) - return; - - adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG; - - autoneg = hw->phy.autoneg_advertised; - if ((!autoneg) && (hw->mac.ops.get_link_capabilities)) - hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation); - if (hw->mac.ops.setup_link) - hw->mac.ops.setup_link(hw, autoneg, negotiation, true); - - adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE; - adapter->link_check_timeout = jiffies; - clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state); -} - -#ifdef CONFIG_PCI_IOV -static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter) -{ - int vf; - struct ixgbe_hw *hw = &adapter->hw; - struct net_device *netdev = adapter->netdev; - u32 gpc; - u32 ciaa, ciad; - - gpc = IXGBE_READ_REG(hw, IXGBE_TXDGPC); - if (gpc) /* If incrementing then no need for the check below */ - return; - /* - * Check to see if a bad DMA write target from an errant or - * malicious VF has caused a PCIe error. If so then we can - * issue a VFLR to the offending VF(s) and then resume without - * requesting a full slot reset. - */ - - for (vf = 0; vf < adapter->num_vfs; vf++) { - ciaa = (vf << 16) | 0x80000000; - /* 32 bit read so align, we really want status at offset 6 */ - ciaa |= PCI_COMMAND; - IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa); - ciad = IXGBE_READ_REG(hw, IXGBE_CIAD_82599); - ciaa &= 0x7FFFFFFF; - /* disable debug mode asap after reading data */ - IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa); - /* Get the upper 16 bits which will be the PCI status reg */ - ciad >>= 16; - if (ciad & PCI_STATUS_REC_MASTER_ABORT) { - netdev_err(netdev, "VF %d Hung DMA\n", vf); - /* Issue VFLR */ - ciaa = (vf << 16) | 0x80000000; - ciaa |= 0xA8; - IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa); - ciad = 0x00008000; /* VFLR */ - IXGBE_WRITE_REG(hw, IXGBE_CIAD_82599, ciad); - ciaa &= 0x7FFFFFFF; - IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa); - } - } -} - -#endif -/** - * ixgbe_service_timer - Timer Call-back - * @data: pointer to adapter cast into an unsigned long - **/ -static void ixgbe_service_timer(unsigned long data) -{ - struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data; - unsigned long next_event_offset; - bool ready = true; - - /* poll faster when waiting for link */ - if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) - next_event_offset = HZ / 10; - else - next_event_offset = HZ * 2; - -#ifdef CONFIG_PCI_IOV - /* - * don't bother with SR-IOV VF DMA hang check if there are - * no VFs or the link is down - */ - if (!adapter->num_vfs || - (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)) - goto normal_timer_service; - - /* If we have VFs allocated then we must check for DMA hangs */ - ixgbe_check_for_bad_vf(adapter); - next_event_offset = HZ / 50; - adapter->timer_event_accumulator++; - - if (adapter->timer_event_accumulator >= 100) - adapter->timer_event_accumulator = 0; - else - ready = false; - -normal_timer_service: -#endif - /* Reset the timer */ - mod_timer(&adapter->service_timer, next_event_offset + jiffies); - - if (ready) - ixgbe_service_event_schedule(adapter); -} - -static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter) -{ - if (!(adapter->flags2 & IXGBE_FLAG2_RESET_REQUESTED)) - return; - - adapter->flags2 &= ~IXGBE_FLAG2_RESET_REQUESTED; - - /* If we're already down or resetting, just bail */ - if (test_bit(__IXGBE_DOWN, &adapter->state) || - test_bit(__IXGBE_RESETTING, &adapter->state)) - return; - - ixgbe_dump(adapter); - netdev_err(adapter->netdev, "Reset adapter\n"); - adapter->tx_timeout_count++; - - ixgbe_reinit_locked(adapter); -} - -/** - * ixgbe_service_task - manages and runs subtasks - * @work: pointer to work_struct containing our data - **/ -static void ixgbe_service_task(struct work_struct *work) -{ - struct ixgbe_adapter *adapter = container_of(work, - struct ixgbe_adapter, - service_task); - - ixgbe_reset_subtask(adapter); - ixgbe_sfp_detection_subtask(adapter); - ixgbe_sfp_link_config_subtask(adapter); - ixgbe_check_overtemp_subtask(adapter); - ixgbe_watchdog_subtask(adapter); - ixgbe_fdir_reinit_subtask(adapter); - ixgbe_check_hang_subtask(adapter); - - ixgbe_service_event_complete(adapter); -} - -static int ixgbe_tso(struct ixgbe_ring *tx_ring, - struct ixgbe_tx_buffer *first, - u8 *hdr_len) -{ - struct sk_buff *skb = first->skb; - u32 vlan_macip_lens, type_tucmd; - u32 mss_l4len_idx, l4len; - - if (!skb_is_gso(skb)) - return 0; - - if (skb_header_cloned(skb)) { - int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); - if (err) - return err; - } - - /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ - type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP; - - if (first->protocol == __constant_htons(ETH_P_IP)) { - struct iphdr *iph = ip_hdr(skb); - iph->tot_len = 0; - iph->check = 0; - tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, - iph->daddr, 0, - IPPROTO_TCP, - 0); - type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4; - first->tx_flags |= IXGBE_TX_FLAGS_TSO | - IXGBE_TX_FLAGS_CSUM | - IXGBE_TX_FLAGS_IPV4; - } else if (skb_is_gso_v6(skb)) { - ipv6_hdr(skb)->payload_len = 0; - tcp_hdr(skb)->check = - ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, - &ipv6_hdr(skb)->daddr, - 0, IPPROTO_TCP, 0); - first->tx_flags |= IXGBE_TX_FLAGS_TSO | - IXGBE_TX_FLAGS_CSUM; - } - - /* compute header lengths */ - l4len = tcp_hdrlen(skb); - *hdr_len = skb_transport_offset(skb) + l4len; - - /* 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 = l4len << IXGBE_ADVTXD_L4LEN_SHIFT; - mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT; - mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT; - - /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */ - vlan_macip_lens = skb_network_header_len(skb); - vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT; - vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK; - - ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd, - mss_l4len_idx); - - return 1; -} - -static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring, - struct ixgbe_tx_buffer *first) -{ - struct sk_buff *skb = first->skb; - u32 vlan_macip_lens = 0; - u32 mss_l4len_idx = 0; - u32 type_tucmd = 0; - - if (skb->ip_summed != CHECKSUM_PARTIAL) { - if (!(first->tx_flags & IXGBE_TX_FLAGS_HW_VLAN) && - !(first->tx_flags & IXGBE_TX_FLAGS_TXSW)) - return; - } else { - u8 l4_hdr = 0; - switch (first->protocol) { - case __constant_htons(ETH_P_IP): - vlan_macip_lens |= skb_network_header_len(skb); - type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4; - l4_hdr = ip_hdr(skb)->protocol; - break; - case __constant_htons(ETH_P_IPV6): - vlan_macip_lens |= skb_network_header_len(skb); - l4_hdr = ipv6_hdr(skb)->nexthdr; - break; - default: - if (unlikely(net_ratelimit())) { - dev_warn(tx_ring->dev, - "partial checksum but proto=%x!\n", - first->protocol); - } - break; - } - - switch (l4_hdr) { - case IPPROTO_TCP: - type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP; - mss_l4len_idx = tcp_hdrlen(skb) << - IXGBE_ADVTXD_L4LEN_SHIFT; - break; - case IPPROTO_SCTP: - type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP; - mss_l4len_idx = sizeof(struct sctphdr) << - IXGBE_ADVTXD_L4LEN_SHIFT; - break; - case IPPROTO_UDP: - mss_l4len_idx = sizeof(struct udphdr) << - IXGBE_ADVTXD_L4LEN_SHIFT; - break; - default: - if (unlikely(net_ratelimit())) { - dev_warn(tx_ring->dev, - "partial checksum but l4 proto=%x!\n", - l4_hdr); - } - break; - } - - /* update TX checksum flag */ - first->tx_flags |= IXGBE_TX_FLAGS_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; - - ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, - type_tucmd, mss_l4len_idx); -} - -static __le32 ixgbe_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_HW_VLAN) - cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE); - - /* set segmentation enable bits for TSO/FSO */ -#ifdef IXGBE_FCOE - if (tx_flags & (IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_FSO)) -#else - if (tx_flags & IXGBE_TX_FLAGS_TSO) -#endif - cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE); - - return cmd_type; -} - -static void ixgbe_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 */ -#ifdef IXGBE_FCOE - if (tx_flags & (IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_FCOE)) -#else - if (tx_flags & IXGBE_TX_FLAGS_TSO) -#endif - olinfo_status |= cpu_to_le32(1 << 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 - */ -#ifdef IXGBE_FCOE - if (tx_flags & (IXGBE_TX_FLAGS_TXSW | IXGBE_TX_FLAGS_FCOE)) -#else - if (tx_flags & IXGBE_TX_FLAGS_TXSW) -#endif - olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC); - - tx_desc->read.olinfo_status = olinfo_status; -} - -#define IXGBE_TXD_CMD (IXGBE_TXD_CMD_EOP | \ - IXGBE_TXD_CMD_RS) - -static void ixgbe_tx_map(struct ixgbe_ring *tx_ring, - struct ixgbe_tx_buffer *first, - const u8 hdr_len) -{ - dma_addr_t dma; - struct sk_buff *skb = first->skb; - struct ixgbe_tx_buffer *tx_buffer; - union ixgbe_adv_tx_desc *tx_desc; - struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0]; - unsigned int data_len = skb->data_len; - unsigned int size = skb_headlen(skb); - unsigned int paylen = skb->len - hdr_len; - u32 tx_flags = first->tx_flags; - __le32 cmd_type; - u16 i = tx_ring->next_to_use; - - tx_desc = IXGBE_TX_DESC(tx_ring, i); - - ixgbe_tx_olinfo_status(tx_desc, tx_flags, paylen); - cmd_type = ixgbe_tx_cmd_type(tx_flags); - -#ifdef IXGBE_FCOE - if (tx_flags & IXGBE_TX_FLAGS_FCOE) { - if (data_len < sizeof(struct fcoe_crc_eof)) { - size -= sizeof(struct fcoe_crc_eof) - data_len; - data_len = 0; - } else { - data_len -= sizeof(struct fcoe_crc_eof); - } - } - -#endif - dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE); - if (dma_mapping_error(tx_ring->dev, dma)) - goto dma_error; - - /* record length, and DMA address */ - dma_unmap_len_set(first, len, size); - dma_unmap_addr_set(first, dma, dma); - - tx_desc->read.buffer_addr = cpu_to_le64(dma); - - for (;;) { - 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 = IXGBE_TX_DESC(tx_ring, 0); - i = 0; - } - - dma += IXGBE_MAX_DATA_PER_TXD; - size -= IXGBE_MAX_DATA_PER_TXD; - - tx_desc->read.buffer_addr = cpu_to_le64(dma); - tx_desc->read.olinfo_status = 0; - } - - if (likely(!data_len)) - break; - - if (unlikely(skb->no_fcs)) - cmd_type &= ~(cpu_to_le32(IXGBE_ADVTXD_DCMD_IFCS)); - tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size); - - i++; - tx_desc++; - if (i == tx_ring->count) { - tx_desc = IXGBE_TX_DESC(tx_ring, 0); - i = 0; - } - -#ifdef IXGBE_FCOE - size = min_t(unsigned int, data_len, skb_frag_size(frag)); -#else - size = skb_frag_size(frag); -#endif - data_len -= size; - - dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size, - DMA_TO_DEVICE); - if (dma_mapping_error(tx_ring->dev, dma)) - goto dma_error; - - tx_buffer = &tx_ring->tx_buffer_info[i]; - 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); - tx_desc->read.olinfo_status = 0; - - frag++; - } - - /* 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; - - netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount); - - /* 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 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 */ - writel(i, tx_ring->tail); - - return; -dma_error: - dev_err(tx_ring->dev, "TX DMA map failed\n"); - - /* clear dma mappings for failed tx_buffer_info map */ - for (;;) { - tx_buffer = &tx_ring->tx_buffer_info[i]; - ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer); - if (tx_buffer == first) - break; - if (i == 0) - i = tx_ring->count; - i--; - } - - tx_ring->next_to_use = i; -} - -static void ixgbe_atr(struct ixgbe_ring *ring, - struct ixgbe_tx_buffer *first) -{ - struct ixgbe_q_vector *q_vector = ring->q_vector; - union ixgbe_atr_hash_dword input = { .dword = 0 }; - union ixgbe_atr_hash_dword common = { .dword = 0 }; - union { - unsigned char *network; - struct iphdr *ipv4; - struct ipv6hdr *ipv6; - } hdr; - struct tcphdr *th; - __be16 vlan_id; - - /* if ring doesn't have a interrupt vector, cannot perform ATR */ - if (!q_vector) - return; - - /* do nothing if sampling is disabled */ - if (!ring->atr_sample_rate) - return; - - ring->atr_count++; - - /* snag network header to get L4 type and address */ - hdr.network = skb_network_header(first->skb); - - /* Currently only IPv4/IPv6 with TCP is supported */ - if ((first->protocol != __constant_htons(ETH_P_IPV6) || - hdr.ipv6->nexthdr != IPPROTO_TCP) && - (first->protocol != __constant_htons(ETH_P_IP) || - hdr.ipv4->protocol != IPPROTO_TCP)) - return; - - th = tcp_hdr(first->skb); - - /* skip this packet since it is invalid or the socket is closing */ - if (!th || th->fin) - return; - - /* sample on all syn packets or once every atr sample count */ - if (!th->syn && (ring->atr_count < ring->atr_sample_rate)) - return; - - /* reset sample count */ - ring->atr_count = 0; - - vlan_id = htons(first->tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT); - - /* - * src and dst are inverted, think how the receiver sees them - * - * The input is broken into two sections, a non-compressed section - * containing vm_pool, vlan_id, and flow_type. The rest of the data - * is XORed together and stored in the compressed dword. - */ - input.formatted.vlan_id = vlan_id; - - /* - * since src port and flex bytes occupy the same word XOR them together - * and write the value to source port portion of compressed dword - */ - if (first->tx_flags & (IXGBE_TX_FLAGS_SW_VLAN | IXGBE_TX_FLAGS_HW_VLAN)) - common.port.src ^= th->dest ^ __constant_htons(ETH_P_8021Q); - else - common.port.src ^= th->dest ^ first->protocol; - common.port.dst ^= th->source; - - if (first->protocol == __constant_htons(ETH_P_IP)) { - input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4; - common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr; - } else { - input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6; - common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^ - hdr.ipv6->saddr.s6_addr32[1] ^ - hdr.ipv6->saddr.s6_addr32[2] ^ - hdr.ipv6->saddr.s6_addr32[3] ^ - hdr.ipv6->daddr.s6_addr32[0] ^ - hdr.ipv6->daddr.s6_addr32[1] ^ - hdr.ipv6->daddr.s6_addr32[2] ^ - hdr.ipv6->daddr.s6_addr32[3]; - } - - /* This assumes the Rx queue and Tx queue are bound to the same CPU */ - ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw, - input, common, ring->queue_index); -} - -static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 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(ixgbe_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 inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size) -{ - if (likely(ixgbe_desc_unused(tx_ring) >= size)) - return 0; - return __ixgbe_maybe_stop_tx(tx_ring, size); -} - -static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb) -{ - struct ixgbe_adapter *adapter = netdev_priv(dev); - int txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : - smp_processor_id(); -#ifdef IXGBE_FCOE - __be16 protocol = vlan_get_protocol(skb); - - if (((protocol == htons(ETH_P_FCOE)) || - (protocol == htons(ETH_P_FIP))) && - (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) { - txq &= (adapter->ring_feature[RING_F_FCOE].indices - 1); - txq += adapter->ring_feature[RING_F_FCOE].mask; - return txq; - } -#endif - - if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) { - while (unlikely(txq >= dev->real_num_tx_queues)) - txq -= dev->real_num_tx_queues; - return txq; - } - - return skb_tx_hash(dev, skb); -} - -netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb, - struct ixgbe_adapter *adapter, - struct ixgbe_ring *tx_ring) -{ - struct ixgbe_tx_buffer *first; - int tso; - u32 tx_flags = 0; -#if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD - unsigned short f; -#endif - u16 count = TXD_USE_COUNT(skb_headlen(skb)); - __be16 protocol = skb->protocol; - u8 hdr_len = 0; - - /* - * 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 (ixgbe_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 we have a HW VLAN tag being added default to the HW one */ - if (vlan_tx_tag_present(skb)) { - tx_flags |= vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT; - tx_flags |= IXGBE_TX_FLAGS_HW_VLAN; - /* else if it is a SW VLAN check the next protocol and store the tag */ - } else if (protocol == __constant_htons(ETH_P_8021Q)) { - struct vlan_hdr *vhdr, _vhdr; - vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr); - if (!vhdr) - goto out_drop; - - protocol = vhdr->h_vlan_encapsulated_proto; - tx_flags |= ntohs(vhdr->h_vlan_TCI) << - IXGBE_TX_FLAGS_VLAN_SHIFT; - tx_flags |= IXGBE_TX_FLAGS_SW_VLAN; - } - -#ifdef CONFIG_PCI_IOV - /* - * Use the l2switch_enable flag - would be false if the DMA - * Tx switch had been disabled. - */ - if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) - tx_flags |= IXGBE_TX_FLAGS_TXSW; - -#endif - /* DCB maps skb priorities 0-7 onto 3 bit PCP of VLAN tag. */ - if ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) && - ((tx_flags & (IXGBE_TX_FLAGS_HW_VLAN | IXGBE_TX_FLAGS_SW_VLAN)) || - (skb->priority != TC_PRIO_CONTROL))) { - tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK; - tx_flags |= (skb->priority & 0x7) << - IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT; - if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) { - struct vlan_ethhdr *vhdr; - if (skb_header_cloned(skb) && - pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) - goto out_drop; - vhdr = (struct vlan_ethhdr *)skb->data; - vhdr->h_vlan_TCI = htons(tx_flags >> - IXGBE_TX_FLAGS_VLAN_SHIFT); - } else { - tx_flags |= IXGBE_TX_FLAGS_HW_VLAN; - } - } - - /* record initial flags and protocol */ - first->tx_flags = tx_flags; - first->protocol = protocol; - -#ifdef IXGBE_FCOE - /* setup tx offload for FCoE */ - if ((protocol == __constant_htons(ETH_P_FCOE)) && - (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) { - tso = ixgbe_fso(tx_ring, first, &hdr_len); - if (tso < 0) - goto out_drop; - - goto xmit_fcoe; - } - -#endif /* IXGBE_FCOE */ - tso = ixgbe_tso(tx_ring, first, &hdr_len); - if (tso < 0) - goto out_drop; - else if (!tso) - ixgbe_tx_csum(tx_ring, first); - - /* add the ATR filter if ATR is on */ - if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state)) - ixgbe_atr(tx_ring, first); - -#ifdef IXGBE_FCOE -xmit_fcoe: -#endif /* IXGBE_FCOE */ - ixgbe_tx_map(tx_ring, first, hdr_len); - - ixgbe_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 ixgbe_xmit_frame(struct sk_buff *skb, - struct net_device *netdev) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - struct ixgbe_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 ixgbe_xmit_frame_ring(skb, adapter, tx_ring); -} - -/** - * ixgbe_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 ixgbe_set_mac(struct net_device *netdev, void *p) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - struct sockaddr *addr = p; - - if (!is_valid_ether_addr(addr->sa_data)) - return -EADDRNOTAVAIL; - - memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); - memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len); - - hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs, - IXGBE_RAH_AV); - - return 0; -} - -static int -ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - u16 value; - int rc; - - if (prtad != hw->phy.mdio.prtad) - return -EINVAL; - rc = hw->phy.ops.read_reg(hw, addr, devad, &value); - if (!rc) - rc = value; - return rc; -} - -static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad, - u16 addr, u16 value) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - - if (prtad != hw->phy.mdio.prtad) - return -EINVAL; - return hw->phy.ops.write_reg(hw, addr, devad, value); -} - -static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - - return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd); -} - -/** - * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding - * netdev->dev_addrs - * @netdev: network interface device structure - * - * Returns non-zero on failure - **/ -static int ixgbe_add_sanmac_netdev(struct net_device *dev) -{ - int err = 0; - struct ixgbe_adapter *adapter = netdev_priv(dev); - struct ixgbe_mac_info *mac = &adapter->hw.mac; - - if (is_valid_ether_addr(mac->san_addr)) { - rtnl_lock(); - err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN); - rtnl_unlock(); - } - return err; -} - -/** - * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding - * netdev->dev_addrs - * @netdev: network interface device structure - * - * Returns non-zero on failure - **/ -static int ixgbe_del_sanmac_netdev(struct net_device *dev) -{ - int err = 0; - struct ixgbe_adapter *adapter = netdev_priv(dev); - struct ixgbe_mac_info *mac = &adapter->hw.mac; - - if (is_valid_ether_addr(mac->san_addr)) { - rtnl_lock(); - err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN); - rtnl_unlock(); - } - return err; -} - -#ifdef CONFIG_NET_POLL_CONTROLLER -/* - * Polling 'interrupt' - used by things like netconsole to send skbs - * without having to re-enable interrupts. It's not called while - * the interrupt routine is executing. - */ -static void ixgbe_netpoll(struct net_device *netdev) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - int i; - - /* if interface is down do nothing */ - if (test_bit(__IXGBE_DOWN, &adapter->state)) - return; - - adapter->flags |= IXGBE_FLAG_IN_NETPOLL; - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { - int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - for (i = 0; i < num_q_vectors; i++) { - struct ixgbe_q_vector *q_vector = adapter->q_vector[i]; - ixgbe_msix_clean_rings(0, q_vector); - } - } else { - ixgbe_intr(adapter->pdev->irq, netdev); - } - adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL; -} - -#endif -static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev, - struct rtnl_link_stats64 *stats) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - int i; - - rcu_read_lock(); - for (i = 0; i < adapter->num_rx_queues; i++) { - struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]); - u64 bytes, packets; - unsigned int start; - - if (ring) { - do { - start = u64_stats_fetch_begin_bh(&ring->syncp); - packets = ring->stats.packets; - bytes = ring->stats.bytes; - } while (u64_stats_fetch_retry_bh(&ring->syncp, start)); - stats->rx_packets += packets; - stats->rx_bytes += bytes; - } - } - - for (i = 0; i < adapter->num_tx_queues; i++) { - struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_ring[i]); - u64 bytes, packets; - unsigned int start; - - if (ring) { - do { - start = u64_stats_fetch_begin_bh(&ring->syncp); - packets = ring->stats.packets; - bytes = ring->stats.bytes; - } while (u64_stats_fetch_retry_bh(&ring->syncp, start)); - stats->tx_packets += packets; - stats->tx_bytes += bytes; - } - } - rcu_read_unlock(); - /* following stats updated by ixgbe_watchdog_task() */ - stats->multicast = netdev->stats.multicast; - stats->rx_errors = netdev->stats.rx_errors; - stats->rx_length_errors = netdev->stats.rx_length_errors; - stats->rx_crc_errors = netdev->stats.rx_crc_errors; - stats->rx_missed_errors = netdev->stats.rx_missed_errors; - return stats; -} - -#ifdef CONFIG_IXGBE_DCB -/* ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid. - * #adapter: pointer to ixgbe_adapter - * @tc: number of traffic classes currently enabled - * - * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm - * 802.1Q priority maps to a packet buffer that exists. - */ -static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 reg, rsave; - int i; - - /* 82598 have a static priority to TC mapping that can not - * be changed so no validation is needed. - */ - if (hw->mac.type == ixgbe_mac_82598EB) - return; - - reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC); - rsave = reg; - - for (i = 0; i < MAX_TRAFFIC_CLASS; i++) { - u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT); - - /* If up2tc is out of bounds default to zero */ - if (up2tc > tc) - reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT); - } - - if (reg != rsave) - IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg); - - return; -} - -/* ixgbe_setup_tc - routine to configure net_device for multiple traffic - * classes. - * - * @netdev: net device to configure - * @tc: number of traffic classes to enable - */ -int ixgbe_setup_tc(struct net_device *dev, u8 tc) -{ - struct ixgbe_adapter *adapter = netdev_priv(dev); - struct ixgbe_hw *hw = &adapter->hw; - - /* Multiple traffic classes requires multiple queues */ - if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) { - e_err(drv, "Enable failed, needs MSI-X\n"); - return -EINVAL; - } - - /* Hardware supports up to 8 traffic classes */ - if (tc > adapter->dcb_cfg.num_tcs.pg_tcs || - (hw->mac.type == ixgbe_mac_82598EB && - tc < MAX_TRAFFIC_CLASS)) - return -EINVAL; - - /* 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)) - ixgbe_close(dev); - ixgbe_clear_interrupt_scheme(adapter); - - if (tc) { - netdev_set_num_tc(dev, tc); - adapter->last_lfc_mode = adapter->hw.fc.current_mode; - adapter->flags |= IXGBE_FLAG_DCB_ENABLED; - adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE; - - if (adapter->hw.mac.type == ixgbe_mac_82598EB) - adapter->hw.fc.requested_mode = ixgbe_fc_none; - } else { - netdev_reset_tc(dev); - adapter->hw.fc.requested_mode = adapter->last_lfc_mode; - - adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED; - adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE; - - adapter->temp_dcb_cfg.pfc_mode_enable = false; - adapter->dcb_cfg.pfc_mode_enable = false; - } - - ixgbe_init_interrupt_scheme(adapter); - ixgbe_validate_rtr(adapter, tc); - if (netif_running(dev)) - ixgbe_open(dev); - - return 0; -} - -#endif /* CONFIG_IXGBE_DCB */ -void ixgbe_do_reset(struct net_device *netdev) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - - if (netif_running(netdev)) - ixgbe_reinit_locked(adapter); - else - ixgbe_reset(adapter); -} - -static netdev_features_t ixgbe_fix_features(struct net_device *netdev, - netdev_features_t features) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - -#ifdef CONFIG_DCB - if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) - features &= ~NETIF_F_HW_VLAN_RX; -#endif - - /* return error if RXHASH is being enabled when RSS is not supported */ - if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED)) - features &= ~NETIF_F_RXHASH; - - /* If Rx checksum is disabled, then RSC/LRO should also be disabled */ - if (!(features & NETIF_F_RXCSUM)) - features &= ~NETIF_F_LRO; - - /* Turn off LRO if not RSC capable */ - if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)) - features &= ~NETIF_F_LRO; - - - return features; -} - -static int ixgbe_set_features(struct net_device *netdev, - netdev_features_t features) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - netdev_features_t changed = netdev->features ^ features; - bool need_reset = false; - - /* Make sure RSC matches LRO, reset if change */ - if (!(features & NETIF_F_LRO)) { - if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) - need_reset = true; - adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED; - } else if ((adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) && - !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) { - if (adapter->rx_itr_setting == 1 || - adapter->rx_itr_setting > IXGBE_MIN_RSC_ITR) { - adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED; - need_reset = true; - } else if ((changed ^ features) & NETIF_F_LRO) { - e_info(probe, "rx-usecs set too low, " - "disabling RSC\n"); - } - } - - /* - * Check if Flow Director n-tuple support was enabled or disabled. If - * the state changed, we need to reset. - */ - if (!(features & NETIF_F_NTUPLE)) { - if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) { - /* turn off Flow Director, set ATR and reset */ - if ((adapter->flags & IXGBE_FLAG_RSS_ENABLED) && - !(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) - adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE; - need_reset = true; - } - adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE; - } else if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)) { - /* turn off ATR, enable perfect filters and reset */ - adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE; - adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE; - need_reset = true; - } - - if (changed & NETIF_F_RXALL) - need_reset = true; - - netdev->features = features; - if (need_reset) - ixgbe_do_reset(netdev); - - return 0; -} - -static const struct net_device_ops ixgbe_netdev_ops = { - .ndo_open = ixgbe_open, - .ndo_stop = ixgbe_close, - .ndo_start_xmit = ixgbe_xmit_frame, - .ndo_select_queue = ixgbe_select_queue, - .ndo_set_rx_mode = ixgbe_set_rx_mode, - .ndo_validate_addr = eth_validate_addr, - .ndo_set_mac_address = ixgbe_set_mac, - .ndo_change_mtu = ixgbe_change_mtu, - .ndo_tx_timeout = ixgbe_tx_timeout, - .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid, - .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid, - .ndo_do_ioctl = ixgbe_ioctl, - .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac, - .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan, - .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw, - .ndo_set_vf_spoofchk = ixgbe_ndo_set_vf_spoofchk, - .ndo_get_vf_config = ixgbe_ndo_get_vf_config, - .ndo_get_stats64 = ixgbe_get_stats64, -#ifdef CONFIG_IXGBE_DCB - .ndo_setup_tc = ixgbe_setup_tc, -#endif -#ifdef CONFIG_NET_POLL_CONTROLLER - .ndo_poll_controller = ixgbe_netpoll, -#endif -#ifdef IXGBE_FCOE - .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get, - .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target, - .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put, - .ndo_fcoe_enable = ixgbe_fcoe_enable, - .ndo_fcoe_disable = ixgbe_fcoe_disable, - .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn, - .ndo_fcoe_get_hbainfo = ixgbe_fcoe_get_hbainfo, -#endif /* IXGBE_FCOE */ - .ndo_set_features = ixgbe_set_features, - .ndo_fix_features = ixgbe_fix_features, -}; - -static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter, - const struct ixgbe_info *ii) -{ -#ifdef CONFIG_PCI_IOV - struct ixgbe_hw *hw = &adapter->hw; - - if (hw->mac.type == ixgbe_mac_82598EB) - return; - - /* The 82599 supports up to 64 VFs per physical function - * but this implementation limits allocation to 63 so that - * basic networking resources are still available to the - * physical function - */ - adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs; - ixgbe_enable_sriov(adapter, ii); -#endif /* CONFIG_PCI_IOV */ -} - -/** - * ixgbe_probe - Device Initialization Routine - * @pdev: PCI device information struct - * @ent: entry in ixgbe_pci_tbl - * - * Returns 0 on success, negative on failure - * - * ixgbe_probe initializes an adapter identified by a pci_dev structure. - * The OS initialization, configuring of the adapter private structure, - * and a hardware reset occur. - **/ -static int __devinit ixgbe_probe(struct pci_dev *pdev, - const struct pci_device_id *ent) -{ - struct net_device *netdev; - struct ixgbe_adapter *adapter = NULL; - struct ixgbe_hw *hw; - const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data]; - static int cards_found; - int i, err, pci_using_dac; - u8 part_str[IXGBE_PBANUM_LENGTH]; - unsigned int indices = num_possible_cpus(); -#ifdef IXGBE_FCOE - u16 device_caps; -#endif - u32 eec; - u16 wol_cap; - - /* Catch broken hardware that put the wrong VF device ID in - * the PCIe SR-IOV capability. - */ - if (pdev->is_virtfn) { - WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n", - pci_name(pdev), pdev->vendor, pdev->device); - return -EINVAL; - } - - err = pci_enable_device_mem(pdev); - if (err) - return err; - - if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) && - !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { - pci_using_dac = 1; - } else { - err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); - if (err) { - err = dma_set_coherent_mask(&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_selected_regions(pdev, pci_select_bars(pdev, - IORESOURCE_MEM), ixgbe_driver_name); - if (err) { - dev_err(&pdev->dev, - "pci_request_selected_regions failed 0x%x\n", err); - goto err_pci_reg; - } - - pci_enable_pcie_error_reporting(pdev); - - pci_set_master(pdev); - pci_save_state(pdev); - -#ifdef CONFIG_IXGBE_DCB - indices *= MAX_TRAFFIC_CLASS; -#endif - - if (ii->mac == ixgbe_mac_82598EB) - indices = min_t(unsigned int, indices, IXGBE_MAX_RSS_INDICES); - else - indices = min_t(unsigned int, indices, IXGBE_MAX_FDIR_INDICES); - -#ifdef IXGBE_FCOE - indices += min_t(unsigned int, num_possible_cpus(), - IXGBE_MAX_FCOE_INDICES); -#endif - netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices); - if (!netdev) { - err = -ENOMEM; - goto err_alloc_etherdev; - } - - SET_NETDEV_DEV(netdev, &pdev->dev); - - adapter = netdev_priv(netdev); - pci_set_drvdata(pdev, adapter); - - adapter->netdev = netdev; - adapter->pdev = pdev; - hw = &adapter->hw; - hw->back = adapter; - adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); - - hw->hw_addr = ioremap(pci_resource_start(pdev, 0), - pci_resource_len(pdev, 0)); - if (!hw->hw_addr) { - err = -EIO; - goto err_ioremap; - } - - for (i = 1; i <= 5; i++) { - if (pci_resource_len(pdev, i) == 0) - continue; - } - - netdev->netdev_ops = &ixgbe_netdev_ops; - ixgbe_set_ethtool_ops(netdev); - netdev->watchdog_timeo = 5 * HZ; - strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); - - adapter->bd_number = cards_found; - - /* Setup hw api */ - memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops)); - hw->mac.type = ii->mac; - - /* EEPROM */ - memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops)); - eec = IXGBE_READ_REG(hw, IXGBE_EEC); - /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */ - if (!(eec & (1 << 8))) - hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic; - - /* PHY */ - memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops)); - hw->phy.sfp_type = ixgbe_sfp_type_unknown; - /* ixgbe_identify_phy_generic will set prtad and mmds properly */ - hw->phy.mdio.prtad = MDIO_PRTAD_NONE; - hw->phy.mdio.mmds = 0; - hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22; - hw->phy.mdio.dev = netdev; - hw->phy.mdio.mdio_read = ixgbe_mdio_read; - hw->phy.mdio.mdio_write = ixgbe_mdio_write; - - ii->get_invariants(hw); - - /* setup the private structure */ - err = ixgbe_sw_init(adapter); - if (err) - goto err_sw_init; - - /* Make it possible the adapter to be woken up via WOL */ - switch (adapter->hw.mac.type) { - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0); - break; - default: - break; - } - - /* - * If there is a fan on this device and it has failed log the - * failure. - */ - if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) { - u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP); - if (esdp & IXGBE_ESDP_SDP1) - e_crit(probe, "Fan has stopped, replace the adapter\n"); - } - - if (allow_unsupported_sfp) - hw->allow_unsupported_sfp = allow_unsupported_sfp; - - /* reset_hw fills in the perm_addr as well */ - hw->phy.reset_if_overtemp = true; - err = hw->mac.ops.reset_hw(hw); - hw->phy.reset_if_overtemp = false; - if (err == IXGBE_ERR_SFP_NOT_PRESENT && - hw->mac.type == ixgbe_mac_82598EB) { - err = 0; - } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) { - e_dev_err("failed to load because an unsupported SFP+ " - "module type was detected.\n"); - e_dev_err("Reload the driver after installing a supported " - "module.\n"); - goto err_sw_init; - } else if (err) { - e_dev_err("HW Init failed: %d\n", err); - goto err_sw_init; - } - - ixgbe_probe_vf(adapter, ii); - - netdev->features = NETIF_F_SG | - NETIF_F_IP_CSUM | - NETIF_F_IPV6_CSUM | - NETIF_F_HW_VLAN_TX | - NETIF_F_HW_VLAN_RX | - NETIF_F_HW_VLAN_FILTER | - NETIF_F_TSO | - NETIF_F_TSO6 | - NETIF_F_RXHASH | - NETIF_F_RXCSUM; - - netdev->hw_features = netdev->features; - - switch (adapter->hw.mac.type) { - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - netdev->features |= NETIF_F_SCTP_CSUM; - netdev->hw_features |= NETIF_F_SCTP_CSUM | - NETIF_F_NTUPLE; - break; - default: - break; - } - - netdev->hw_features |= NETIF_F_RXALL; - - netdev->vlan_features |= NETIF_F_TSO; - netdev->vlan_features |= NETIF_F_TSO6; - netdev->vlan_features |= NETIF_F_IP_CSUM; - netdev->vlan_features |= NETIF_F_IPV6_CSUM; - netdev->vlan_features |= NETIF_F_SG; - - netdev->priv_flags |= IFF_UNICAST_FLT; - netdev->priv_flags |= IFF_SUPP_NOFCS; - - if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) - adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED | - IXGBE_FLAG_DCB_ENABLED); - -#ifdef CONFIG_IXGBE_DCB - netdev->dcbnl_ops = &dcbnl_ops; -#endif - -#ifdef IXGBE_FCOE - if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) { - if (hw->mac.ops.get_device_caps) { - hw->mac.ops.get_device_caps(hw, &device_caps); - if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS) - adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE; - } - } - if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) { - netdev->vlan_features |= NETIF_F_FCOE_CRC; - netdev->vlan_features |= NETIF_F_FSO; - netdev->vlan_features |= NETIF_F_FCOE_MTU; - } -#endif /* IXGBE_FCOE */ - if (pci_using_dac) { - netdev->features |= NETIF_F_HIGHDMA; - netdev->vlan_features |= NETIF_F_HIGHDMA; - } - - if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) - netdev->hw_features |= NETIF_F_LRO; - if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) - netdev->features |= NETIF_F_LRO; - - /* make sure the EEPROM is good */ - if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) { - e_dev_err("The EEPROM Checksum Is Not Valid\n"); - err = -EIO; - goto err_sw_init; - } - - memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len); - memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len); - - if (ixgbe_validate_mac_addr(netdev->perm_addr)) { - e_dev_err("invalid MAC address\n"); - err = -EIO; - goto err_sw_init; - } - - setup_timer(&adapter->service_timer, &ixgbe_service_timer, - (unsigned long) adapter); - - INIT_WORK(&adapter->service_task, ixgbe_service_task); - clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state); - - err = ixgbe_init_interrupt_scheme(adapter); - if (err) - goto err_sw_init; - - if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED)) { - netdev->hw_features &= ~NETIF_F_RXHASH; - netdev->features &= ~NETIF_F_RXHASH; - } - - /* WOL not supported for all but the following */ - adapter->wol = 0; - switch (pdev->device) { - case IXGBE_DEV_ID_82599_SFP: - /* Only these subdevice supports WOL */ - switch (pdev->subsystem_device) { - case IXGBE_SUBDEV_ID_82599_560FLR: - /* only support first port */ - if (hw->bus.func != 0) - break; - case IXGBE_SUBDEV_ID_82599_SFP: - adapter->wol = IXGBE_WUFC_MAG; - break; - } - break; - case IXGBE_DEV_ID_82599_COMBO_BACKPLANE: - /* All except this subdevice support WOL */ - if (pdev->subsystem_device != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ) - adapter->wol = IXGBE_WUFC_MAG; - break; - case IXGBE_DEV_ID_82599_KX4: - adapter->wol = IXGBE_WUFC_MAG; - break; - case IXGBE_DEV_ID_X540T: - /* Check eeprom to see if it is enabled */ - hw->eeprom.ops.read(hw, 0x2c, &adapter->eeprom_cap); - wol_cap = adapter->eeprom_cap & IXGBE_DEVICE_CAPS_WOL_MASK; - - if ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0_1) || - ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0) && - (hw->bus.func == 0))) - adapter->wol = IXGBE_WUFC_MAG; - break; - } - device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol); - - /* save off EEPROM version number */ - hw->eeprom.ops.read(hw, 0x2e, &adapter->eeprom_verh); - hw->eeprom.ops.read(hw, 0x2d, &adapter->eeprom_verl); - - /* pick up the PCI bus settings for reporting later */ - hw->mac.ops.get_bus_info(hw); - - /* print bus type/speed/width info */ - e_dev_info("(PCI Express:%s:%s) %pM\n", - (hw->bus.speed == ixgbe_bus_speed_5000 ? "5.0GT/s" : - hw->bus.speed == ixgbe_bus_speed_2500 ? "2.5GT/s" : - "Unknown"), - (hw->bus.width == ixgbe_bus_width_pcie_x8 ? "Width x8" : - hw->bus.width == ixgbe_bus_width_pcie_x4 ? "Width x4" : - hw->bus.width == ixgbe_bus_width_pcie_x1 ? "Width x1" : - "Unknown"), - netdev->dev_addr); - - err = ixgbe_read_pba_string_generic(hw, part_str, IXGBE_PBANUM_LENGTH); - if (err) - strncpy(part_str, "Unknown", IXGBE_PBANUM_LENGTH); - if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present) - e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n", - hw->mac.type, hw->phy.type, hw->phy.sfp_type, - part_str); - else - e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n", - hw->mac.type, hw->phy.type, part_str); - - if (hw->bus.width <= ixgbe_bus_width_pcie_x4) { - e_dev_warn("PCI-Express bandwidth available for this card is " - "not sufficient for optimal performance.\n"); - e_dev_warn("For optimal performance a x8 PCI-Express slot " - "is required.\n"); - } - - /* reset the hardware with the new settings */ - err = hw->mac.ops.start_hw(hw); - if (err == IXGBE_ERR_EEPROM_VERSION) { - /* We are running on a pre-production device, log a warning */ - e_dev_warn("This device is a pre-production adapter/LOM. " - "Please be aware there may be issues associated " - "with your hardware. If you are experiencing " - "problems please contact your Intel or hardware " - "representative who provided you with this " - "hardware.\n"); - } - strcpy(netdev->name, "eth%d"); - err = register_netdev(netdev); - if (err) - goto err_register; - - /* power down the optics for multispeed fiber and 82599 SFP+ fiber */ - if (hw->mac.ops.disable_tx_laser && - ((hw->phy.multispeed_fiber) || - ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) && - (hw->mac.type == ixgbe_mac_82599EB)))) - hw->mac.ops.disable_tx_laser(hw); - - /* carrier off reporting is important to ethtool even BEFORE open */ - netif_carrier_off(netdev); - -#ifdef CONFIG_IXGBE_DCA - if (dca_add_requester(&pdev->dev) == 0) { - adapter->flags |= IXGBE_FLAG_DCA_ENABLED; - ixgbe_setup_dca(adapter); - } -#endif - if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { - e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs); - for (i = 0; i < adapter->num_vfs; i++) - ixgbe_vf_configuration(pdev, (i | 0x10000000)); - } - - /* firmware requires driver version to be 0xFFFFFFFF - * since os does not support feature - */ - if (hw->mac.ops.set_fw_drv_ver) - hw->mac.ops.set_fw_drv_ver(hw, 0xFF, 0xFF, 0xFF, - 0xFF); - - /* add san mac addr to netdev */ - ixgbe_add_sanmac_netdev(netdev); - - e_dev_info("%s\n", ixgbe_default_device_descr); - cards_found++; - return 0; - -err_register: - ixgbe_release_hw_control(adapter); - ixgbe_clear_interrupt_scheme(adapter); -err_sw_init: - if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) - ixgbe_disable_sriov(adapter); - adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP; - iounmap(hw->hw_addr); -err_ioremap: - free_netdev(netdev); -err_alloc_etherdev: - pci_release_selected_regions(pdev, - pci_select_bars(pdev, IORESOURCE_MEM)); -err_pci_reg: -err_dma: - pci_disable_device(pdev); - return err; -} - -/** - * ixgbe_remove - Device Removal Routine - * @pdev: PCI device information struct - * - * ixgbe_remove is called by the PCI subsystem to alert the driver - * that it should release a PCI device. The could be caused by a - * Hot-Plug event, or because the driver is going to be removed from - * memory. - **/ -static void __devexit ixgbe_remove(struct pci_dev *pdev) -{ - struct ixgbe_adapter *adapter = pci_get_drvdata(pdev); - struct net_device *netdev = adapter->netdev; - - set_bit(__IXGBE_DOWN, &adapter->state); - cancel_work_sync(&adapter->service_task); - -#ifdef CONFIG_IXGBE_DCA - if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) { - adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED; - dca_remove_requester(&pdev->dev); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1); - } - -#endif -#ifdef IXGBE_FCOE - if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) - ixgbe_cleanup_fcoe(adapter); - -#endif /* IXGBE_FCOE */ - - /* remove the added san mac */ - ixgbe_del_sanmac_netdev(netdev); - - if (netdev->reg_state == NETREG_REGISTERED) - unregister_netdev(netdev); - - if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { - if (!(ixgbe_check_vf_assignment(adapter))) - ixgbe_disable_sriov(adapter); - else - e_dev_warn("Unloading driver while VFs are assigned " - "- VFs will not be deallocated\n"); - } - - ixgbe_clear_interrupt_scheme(adapter); - - ixgbe_release_hw_control(adapter); - -#ifdef CONFIG_DCB - kfree(adapter->ixgbe_ieee_pfc); - kfree(adapter->ixgbe_ieee_ets); - -#endif - iounmap(adapter->hw.hw_addr); - pci_release_selected_regions(pdev, pci_select_bars(pdev, - IORESOURCE_MEM)); - - e_dev_info("complete\n"); - - free_netdev(netdev); - - pci_disable_pcie_error_reporting(pdev); - - pci_disable_device(pdev); -} - -/** - * ixgbe_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 ixgbe_io_error_detected(struct pci_dev *pdev, - pci_channel_state_t state) -{ - struct ixgbe_adapter *adapter = pci_get_drvdata(pdev); - struct net_device *netdev = adapter->netdev; - -#ifdef CONFIG_PCI_IOV - struct pci_dev *bdev, *vfdev; - u32 dw0, dw1, dw2, dw3; - int vf, pos; - u16 req_id, pf_func; - - if (adapter->hw.mac.type == ixgbe_mac_82598EB || - adapter->num_vfs == 0) - goto skip_bad_vf_detection; - - bdev = pdev->bus->self; - while (bdev && (bdev->pcie_type != PCI_EXP_TYPE_ROOT_PORT)) - bdev = bdev->bus->self; - - if (!bdev) - goto skip_bad_vf_detection; - - pos = pci_find_ext_capability(bdev, PCI_EXT_CAP_ID_ERR); - if (!pos) - goto skip_bad_vf_detection; - - pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG, &dw0); - pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 4, &dw1); - pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 8, &dw2); - pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 12, &dw3); - - req_id = dw1 >> 16; - /* On the 82599 if bit 7 of the requestor ID is set then it's a VF */ - if (!(req_id & 0x0080)) - goto skip_bad_vf_detection; - - pf_func = req_id & 0x01; - if ((pf_func & 1) == (pdev->devfn & 1)) { - unsigned int device_id; - - vf = (req_id & 0x7F) >> 1; - e_dev_err("VF %d has caused a PCIe error\n", vf); - e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: " - "%8.8x\tdw3: %8.8x\n", - dw0, dw1, dw2, dw3); - switch (adapter->hw.mac.type) { - case ixgbe_mac_82599EB: - device_id = IXGBE_82599_VF_DEVICE_ID; - break; - case ixgbe_mac_X540: - device_id = IXGBE_X540_VF_DEVICE_ID; - break; - default: - device_id = 0; - break; - } - - /* Find the pci device of the offending VF */ - vfdev = pci_get_device(IXGBE_INTEL_VENDOR_ID, device_id, NULL); - while (vfdev) { - if (vfdev->devfn == (req_id & 0xFF)) - break; - vfdev = pci_get_device(IXGBE_INTEL_VENDOR_ID, - device_id, vfdev); - } - /* - * There's a slim chance the VF could have been hot plugged, - * so if it is no longer present we don't need to issue the - * VFLR. Just clean up the AER in that case. - */ - if (vfdev) { - e_dev_err("Issuing VFLR to VF %d\n", vf); - pci_write_config_dword(vfdev, 0xA8, 0x00008000); - } - - pci_cleanup_aer_uncorrect_error_status(pdev); - } - - /* - * Even though the error may have occurred on the other port - * we still need to increment the vf error reference count for - * both ports because the I/O resume function will be called - * for both of them. - */ - adapter->vferr_refcount++; - - return PCI_ERS_RESULT_RECOVERED; - -skip_bad_vf_detection: -#endif /* CONFIG_PCI_IOV */ - netif_device_detach(netdev); - - if (state == pci_channel_io_perm_failure) - return PCI_ERS_RESULT_DISCONNECT; - - if (netif_running(netdev)) - ixgbe_down(adapter); - pci_disable_device(pdev); - - /* Request a slot reset. */ - return PCI_ERS_RESULT_NEED_RESET; -} - -/** - * ixgbe_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. - */ -static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev) -{ - struct ixgbe_adapter *adapter = pci_get_drvdata(pdev); - pci_ers_result_t result; - int err; - - if (pci_enable_device_mem(pdev)) { - e_err(probe, "Cannot re-enable PCI device after reset.\n"); - result = PCI_ERS_RESULT_DISCONNECT; - } else { - pci_set_master(pdev); - pci_restore_state(pdev); - pci_save_state(pdev); - - pci_wake_from_d3(pdev, false); - - ixgbe_reset(adapter); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0); - result = PCI_ERS_RESULT_RECOVERED; - } - - err = pci_cleanup_aer_uncorrect_error_status(pdev); - if (err) { - e_dev_err("pci_cleanup_aer_uncorrect_error_status " - "failed 0x%0x\n", err); - /* non-fatal, continue */ - } - - return result; -} - -/** - * ixgbe_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. - */ -static void ixgbe_io_resume(struct pci_dev *pdev) -{ - struct ixgbe_adapter *adapter = pci_get_drvdata(pdev); - struct net_device *netdev = adapter->netdev; - -#ifdef CONFIG_PCI_IOV - if (adapter->vferr_refcount) { - e_info(drv, "Resuming after VF err\n"); - adapter->vferr_refcount--; - return; - } - -#endif - if (netif_running(netdev)) - ixgbe_up(adapter); - - netif_device_attach(netdev); -} - -static struct pci_error_handlers ixgbe_err_handler = { - .error_detected = ixgbe_io_error_detected, - .slot_reset = ixgbe_io_slot_reset, - .resume = ixgbe_io_resume, -}; - -static struct pci_driver ixgbe_driver = { - .name = ixgbe_driver_name, - .id_table = ixgbe_pci_tbl, - .probe = ixgbe_probe, - .remove = __devexit_p(ixgbe_remove), -#ifdef CONFIG_PM - .suspend = ixgbe_suspend, - .resume = ixgbe_resume, -#endif - .shutdown = ixgbe_shutdown, - .err_handler = &ixgbe_err_handler -}; - -/** - * ixgbe_init_module - Driver Registration Routine - * - * ixgbe_init_module is the first routine called when the driver is - * loaded. All it does is register with the PCI subsystem. - **/ -static int __init ixgbe_init_module(void) -{ - int ret; - pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version); - pr_info("%s\n", ixgbe_copyright); - -#ifdef CONFIG_IXGBE_DCA - dca_register_notify(&dca_notifier); -#endif - - ret = pci_register_driver(&ixgbe_driver); - return ret; -} - -module_init(ixgbe_init_module); - -/** - * ixgbe_exit_module - Driver Exit Cleanup Routine - * - * ixgbe_exit_module is called just before the driver is removed - * from memory. - **/ -static void __exit ixgbe_exit_module(void) -{ -#ifdef CONFIG_IXGBE_DCA - dca_unregister_notify(&dca_notifier); -#endif - pci_unregister_driver(&ixgbe_driver); - rcu_barrier(); /* Wait for completion of call_rcu()'s */ -} - -#ifdef CONFIG_IXGBE_DCA -static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event, - void *p) -{ - int ret_val; - - ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event, - __ixgbe_notify_dca); - - return ret_val ? NOTIFY_BAD : NOTIFY_DONE; -} - -#endif /* CONFIG_IXGBE_DCA */ - -module_exit(ixgbe_exit_module); - -/* ixgbe_main.c */ |