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    SubjectRe: [PATCH 2.6.32-rc3] net: VMware virtual Ethernet NIC driver: vmxnet3

    Hello all,

    I do not mean to be bothersome but this thread has been unusually silent.
    Could you please review the patch for me and reply with your comments /
    acks ?

    Thanks.
    ->Shreyas


    On Tue, 6 Oct 2009, Shreyas Bhatewara wrote:

    >
    >
    > Ethernet NIC driver for VMware's vmxnet3
    >
    > From: Shreyas Bhatewara <sbhatewara@vmware.com>
    >
    > This patch adds driver support for VMware's virtual Ethernet NIC: vmxnet3
    > Guests running on VMware hypervisors supporting vmxnet3 device will thus have
    > access to improved network functionalities and performance.
    >
    > Signed-off-by: Shreyas Bhatewara <sbhatewara@vmware.com>
    > Signed-off-by: Bhavesh Davda <bhavesh@vmware.com>
    > Signed-off-by: Ronghua Zhang <ronghua@vmware.com>
    >
    > ---
    >
    > VMware virtual Ethernet NIC Driver : vmxnet3 - v3
    >
    > Changelog (v3-v2)
    > - use ethtool instead of a module param to control hw LRO feature
    > - rebase to 2.6.32-rc3
    >
    > Changelog (v2-v1)
    > - Rebased the patch to v2.6.32-rc1
    > - Changed all uint32_t types to u32 and friends
    > - Removed duplicate max queue size from upt1_defs.h
    > - Replaced #defines by enum
    > - uniform spacing between datatype and membername in structures
    > - removed some noisy printks, eliminated some BUG_ONs
    > - corrected arguments of kcalloc
    > - used pc_request_selected_regions, pci_enable_dev_mem
    > - elminated not-so-useful wrapper functions, used eth_op_ functions instead
    > - used strlcpy
    > - used get_sset_counts instead of get_stats_count
    > - used net_device_stats from struct net_device
    >
    >
    > Please review the patch and provide your feedback/comments for
    > upstreaming.
    >
    > Thanking you
    > ->Shreyas
    >
    > ---
    >
    >
    > diff --git a/MAINTAINERS b/MAINTAINERS
    > index 09a2028..0509f26 100644
    > --- a/MAINTAINERS
    > +++ b/MAINTAINERS
    > @@ -5628,6 +5628,13 @@ S: Maintained
    > F: drivers/vlynq/vlynq.c
    > F: include/linux/vlynq.h
    >
    > +VMWARE VMXNET3 ETHERNET DRIVER
    > +M: Shreyas Bhatewara <sbhatewara@vmware.com>
    > +M: VMware, Inc. <pv-drivers@vmware.com>
    > +L: netdev@vger.kernel.org
    > +S: Maintained
    > +F: drivers/net/vmxnet3/
    > +
    > VOLTAGE AND CURRENT REGULATOR FRAMEWORK
    > M: Liam Girdwood <lrg@slimlogic.co.uk>
    > M: Mark Brown <broonie@opensource.wolfsonmicro.com>
    > diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
    > index 7127760..9789de2 100644
    > --- a/drivers/net/Kconfig
    > +++ b/drivers/net/Kconfig
    > @@ -3230,4 +3230,12 @@ config VIRTIO_NET
    > This is the virtual network driver for virtio. It can be used with
    > lguest or QEMU based VMMs (like KVM or Xen). Say Y or M.
    >
    > +config VMXNET3
    > + tristate "VMware VMXNET3 ethernet driver"
    > + depends on PCI && X86
    > + help
    > + This driver supports VMware's vmxnet3 virtual ethernet NIC.
    > + To compile this driver as a module, choose M here: the
    > + module will be called vmxnet3.
    > +
    > endif # NETDEVICES
    > diff --git a/drivers/net/Makefile b/drivers/net/Makefile
    > index d866b8c..d3a0418 100644
    > --- a/drivers/net/Makefile
    > +++ b/drivers/net/Makefile
    > @@ -26,6 +26,7 @@ obj-$(CONFIG_TEHUTI) += tehuti.o
    > obj-$(CONFIG_ENIC) += enic/
    > obj-$(CONFIG_JME) += jme.o
    > obj-$(CONFIG_BE2NET) += benet/
    > +obj-$(CONFIG_VMXNET3) += vmxnet3/
    >
    > gianfar_driver-objs := gianfar.o \
    > gianfar_ethtool.o \
    > diff --git a/drivers/net/vmxnet3/Makefile b/drivers/net/vmxnet3/Makefile
    > new file mode 100644
    > index 0000000..880f509
    > --- /dev/null
    > +++ b/drivers/net/vmxnet3/Makefile
    > @@ -0,0 +1,35 @@
    > +################################################################################
    > +#
    > +# Linux driver for VMware's vmxnet3 ethernet NIC.
    > +#
    > +# Copyright (C) 2007-2009, VMware, Inc. All Rights Reserved.
    > +#
    > +# This program is free software; you can redistribute it and/or modify it
    > +# under the terms of the GNU General Public License as published by the
    > +# Free Software Foundation; version 2 of the License and no later version.
    > +#
    > +# This program is distributed in the hope that it will be useful, but
    > +# WITHOUT ANY WARRANTY; without even the implied warranty of
    > +# MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
    > +# NON INFRINGEMENT. See the GNU General Public License for more
    > +# details.
    > +#
    > +# You should have received a copy of the GNU General Public License
    > +# along with this program; if not, write to the Free Software
    > +# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    > +#
    > +# The full GNU General Public License is included in this distribution in
    > +# the file called "COPYING".
    > +#
    > +# Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com>
    > +#
    > +#
    > +################################################################################
    > +
    > +#
    > +# Makefile for the VMware vmxnet3 ethernet NIC driver
    > +#
    > +
    > +obj-$(CONFIG_VMXNET3) += vmxnet3.o
    > +
    > +vmxnet3-objs := vmxnet3_drv.o vmxnet3_ethtool.o
    > diff --git a/drivers/net/vmxnet3/upt1_defs.h b/drivers/net/vmxnet3/upt1_defs.h
    > new file mode 100644
    > index 0000000..37108fb
    > --- /dev/null
    > +++ b/drivers/net/vmxnet3/upt1_defs.h
    > @@ -0,0 +1,96 @@
    > +/*
    > + * Linux driver for VMware's vmxnet3 ethernet NIC.
    > + *
    > + * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved.
    > + *
    > + * This program is free software; you can redistribute it and/or modify it
    > + * under the terms of the GNU General Public License as published by the
    > + * Free Software Foundation; version 2 of the License and no later version.
    > + *
    > + * This program is distributed in the hope that it will be useful, but
    > + * WITHOUT ANY WARRANTY; without even the implied warranty of
    > + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
    > + * NON INFRINGEMENT. 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".
    > + *
    > + * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com>
    > + *
    > + */
    > +
    > +#ifndef _UPT1_DEFS_H
    > +#define _UPT1_DEFS_H
    > +
    > +struct UPT1_TxStats {
    > + u64 TSOPktsTxOK; /* TSO pkts post-segmentation */
    > + u64 TSOBytesTxOK;
    > + u64 ucastPktsTxOK;
    > + u64 ucastBytesTxOK;
    > + u64 mcastPktsTxOK;
    > + u64 mcastBytesTxOK;
    > + u64 bcastPktsTxOK;
    > + u64 bcastBytesTxOK;
    > + u64 pktsTxError;
    > + u64 pktsTxDiscard;
    > +};
    > +
    > +struct UPT1_RxStats {
    > + u64 LROPktsRxOK; /* LRO pkts */
    > + u64 LROBytesRxOK; /* bytes from LRO pkts */
    > + /* the following counters are for pkts from the wire, i.e., pre-LRO */
    > + u64 ucastPktsRxOK;
    > + u64 ucastBytesRxOK;
    > + u64 mcastPktsRxOK;
    > + u64 mcastBytesRxOK;
    > + u64 bcastPktsRxOK;
    > + u64 bcastBytesRxOK;
    > + u64 pktsRxOutOfBuf;
    > + u64 pktsRxError;
    > +};
    > +
    > +/* interrupt moderation level */
    > +enum {
    > + UPT1_IML_NONE = 0, /* no interrupt moderation */
    > + UPT1_IML_HIGHEST = 7, /* least intr generated */
    > + UPT1_IML_ADAPTIVE = 8, /* adpative intr moderation */
    > +};
    > +/* values for UPT1_RSSConf.hashFunc */
    > +enum {
    > + UPT1_RSS_HASH_TYPE_NONE = 0x0,
    > + UPT1_RSS_HASH_TYPE_IPV4 = 0x01,
    > + UPT1_RSS_HASH_TYPE_TCP_IPV4 = 0x02,
    > + UPT1_RSS_HASH_TYPE_IPV6 = 0x04,
    > + UPT1_RSS_HASH_TYPE_TCP_IPV6 = 0x08,
    > +};
    > +
    > +enum {
    > + UPT1_RSS_HASH_FUNC_NONE = 0x0,
    > + UPT1_RSS_HASH_FUNC_TOEPLITZ = 0x01,
    > +};
    > +
    > +#define UPT1_RSS_MAX_KEY_SIZE 40
    > +#define UPT1_RSS_MAX_IND_TABLE_SIZE 128
    > +
    > +struct UPT1_RSSConf {
    > + u16 hashType;
    > + u16 hashFunc;
    > + u16 hashKeySize;
    > + u16 indTableSize;
    > + u8 hashKey[UPT1_RSS_MAX_KEY_SIZE];
    > + u8 indTable[UPT1_RSS_MAX_IND_TABLE_SIZE];
    > +};
    > +
    > +/* features */
    > +enum {
    > + UPT1_F_RXCSUM = 0x0001, /* rx csum verification */
    > + UPT1_F_RSS = 0x0002,
    > + UPT1_F_RXVLAN = 0x0004, /* VLAN tag stripping */
    > + UPT1_F_LRO = 0x0008,
    > +};
    > +#endif
    > diff --git a/drivers/net/vmxnet3/vmxnet3_defs.h b/drivers/net/vmxnet3/vmxnet3_defs.h
    > new file mode 100644
    > index 0000000..dc8ee44
    > --- /dev/null
    > +++ b/drivers/net/vmxnet3/vmxnet3_defs.h
    > @@ -0,0 +1,535 @@
    > +/*
    > + * Linux driver for VMware's vmxnet3 ethernet NIC.
    > + *
    > + * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved.
    > + *
    > + * This program is free software; you can redistribute it and/or modify it
    > + * under the terms of the GNU General Public License as published by the
    > + * Free Software Foundation; version 2 of the License and no later version.
    > + *
    > + * This program is distributed in the hope that it will be useful, but
    > + * WITHOUT ANY WARRANTY; without even the implied warranty of
    > + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
    > + * NON INFRINGEMENT. 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".
    > + *
    > + * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com>
    > + *
    > + */
    > +
    > +#ifndef _VMXNET3_DEFS_H_
    > +#define _VMXNET3_DEFS_H_
    > +
    > +#include "upt1_defs.h"
    > +
    > +/* all registers are 32 bit wide */
    > +/* BAR 1 */
    > +enum {
    > + VMXNET3_REG_VRRS = 0x0, /* Vmxnet3 Revision Report Selection */
    > + VMXNET3_REG_UVRS = 0x8, /* UPT Version Report Selection */
    > + VMXNET3_REG_DSAL = 0x10, /* Driver Shared Address Low */
    > + VMXNET3_REG_DSAH = 0x18, /* Driver Shared Address High */
    > + VMXNET3_REG_CMD = 0x20, /* Command */
    > + VMXNET3_REG_MACL = 0x28, /* MAC Address Low */
    > + VMXNET3_REG_MACH = 0x30, /* MAC Address High */
    > + VMXNET3_REG_ICR = 0x38, /* Interrupt Cause Register */
    > + VMXNET3_REG_ECR = 0x40 /* Event Cause Register */
    > +};
    > +
    > +/* BAR 0 */
    > +enum {
    > + VMXNET3_REG_IMR = 0x0, /* Interrupt Mask Register */
    > + VMXNET3_REG_TXPROD = 0x600, /* Tx Producer Index */
    > + VMXNET3_REG_RXPROD = 0x800, /* Rx Producer Index for ring 1 */
    > + VMXNET3_REG_RXPROD2 = 0xA00 /* Rx Producer Index for ring 2 */
    > +};
    > +
    > +#define VMXNET3_PT_REG_SIZE 4096 /* BAR 0 */
    > +#define VMXNET3_VD_REG_SIZE 4096 /* BAR 1 */
    > +
    > +#define VMXNET3_REG_ALIGN 8 /* All registers are 8-byte aligned. */
    > +#define VMXNET3_REG_ALIGN_MASK 0x7
    > +
    > +/* I/O Mapped access to registers */
    > +#define VMXNET3_IO_TYPE_PT 0
    > +#define VMXNET3_IO_TYPE_VD 1
    > +#define VMXNET3_IO_ADDR(type, reg) (((type) << 24) | ((reg) & 0xFFFFFF))
    > +#define VMXNET3_IO_TYPE(addr) ((addr) >> 24)
    > +#define VMXNET3_IO_REG(addr) ((addr) & 0xFFFFFF)
    > +
    > +enum {
    > + VMXNET3_CMD_FIRST_SET = 0xCAFE0000,
    > + VMXNET3_CMD_ACTIVATE_DEV = VMXNET3_CMD_FIRST_SET,
    > + VMXNET3_CMD_QUIESCE_DEV,
    > + VMXNET3_CMD_RESET_DEV,
    > + VMXNET3_CMD_UPDATE_RX_MODE,
    > + VMXNET3_CMD_UPDATE_MAC_FILTERS,
    > + VMXNET3_CMD_UPDATE_VLAN_FILTERS,
    > + VMXNET3_CMD_UPDATE_RSSIDT,
    > + VMXNET3_CMD_UPDATE_IML,
    > + VMXNET3_CMD_UPDATE_PMCFG,
    > + VMXNET3_CMD_UPDATE_FEATURE,
    > + VMXNET3_CMD_LOAD_PLUGIN,
    > +
    > + VMXNET3_CMD_FIRST_GET = 0xF00D0000,
    > + VMXNET3_CMD_GET_QUEUE_STATUS = VMXNET3_CMD_FIRST_GET,
    > + VMXNET3_CMD_GET_STATS,
    > + VMXNET3_CMD_GET_LINK,
    > + VMXNET3_CMD_GET_PERM_MAC_LO,
    > + VMXNET3_CMD_GET_PERM_MAC_HI,
    > + VMXNET3_CMD_GET_DID_LO,
    > + VMXNET3_CMD_GET_DID_HI,
    > + VMXNET3_CMD_GET_DEV_EXTRA_INFO,
    > + VMXNET3_CMD_GET_CONF_INTR
    > +};
    > +
    > +struct Vmxnet3_TxDesc {
    > + u64 addr;
    > +
    > + u32 len:14;
    > + u32 gen:1; /* generation bit */
    > + u32 rsvd:1;
    > + u32 dtype:1; /* descriptor type */
    > + u32 ext1:1;
    > + u32 msscof:14; /* MSS, checksum offset, flags */
    > +
    > + u32 hlen:10; /* header len */
    > + u32 om:2; /* offload mode */
    > + u32 eop:1; /* End Of Packet */
    > + u32 cq:1; /* completion request */
    > + u32 ext2:1;
    > + u32 ti:1; /* VLAN Tag Insertion */
    > + u32 tci:16; /* Tag to Insert */
    > +};
    > +
    > +/* TxDesc.OM values */
    > +#define VMXNET3_OM_NONE 0
    > +#define VMXNET3_OM_CSUM 2
    > +#define VMXNET3_OM_TSO 3
    > +
    > +/* fields in TxDesc we access w/o using bit fields */
    > +#define VMXNET3_TXD_EOP_SHIFT 12
    > +#define VMXNET3_TXD_CQ_SHIFT 13
    > +#define VMXNET3_TXD_GEN_SHIFT 14
    > +
    > +#define VMXNET3_TXD_CQ (1 << VMXNET3_TXD_CQ_SHIFT)
    > +#define VMXNET3_TXD_EOP (1 << VMXNET3_TXD_EOP_SHIFT)
    > +#define VMXNET3_TXD_GEN (1 << VMXNET3_TXD_GEN_SHIFT)
    > +
    > +#define VMXNET3_HDR_COPY_SIZE 128
    > +
    > +
    > +struct Vmxnet3_TxDataDesc {
    > + u8 data[VMXNET3_HDR_COPY_SIZE];
    > +};
    > +
    > +
    > +struct Vmxnet3_TxCompDesc {
    > + u32 txdIdx:12; /* Index of the EOP TxDesc */
    > + u32 ext1:20;
    > +
    > + u32 ext2;
    > + u32 ext3;
    > +
    > + u32 rsvd:24;
    > + u32 type:7; /* completion type */
    > + u32 gen:1; /* generation bit */
    > +};
    > +
    > +
    > +struct Vmxnet3_RxDesc {
    > + u64 addr;
    > +
    > + u32 len:14;
    > + u32 btype:1; /* Buffer Type */
    > + u32 dtype:1; /* Descriptor type */
    > + u32 rsvd:15;
    > + u32 gen:1; /* Generation bit */
    > +
    > + u32 ext1;
    > +};
    > +
    > +/* values of RXD.BTYPE */
    > +#define VMXNET3_RXD_BTYPE_HEAD 0 /* head only */
    > +#define VMXNET3_RXD_BTYPE_BODY 1 /* body only */
    > +
    > +/* fields in RxDesc we access w/o using bit fields */
    > +#define VMXNET3_RXD_BTYPE_SHIFT 14
    > +#define VMXNET3_RXD_GEN_SHIFT 31
    > +
    > +
    > +struct Vmxnet3_RxCompDesc {
    > + u32 rxdIdx:12; /* Index of the RxDesc */
    > + u32 ext1:2;
    > + u32 eop:1; /* End of Packet */
    > + u32 sop:1; /* Start of Packet */
    > + u32 rqID:10; /* rx queue/ring ID */
    > + u32 rssType:4; /* RSS hash type used */
    > + u32 cnc:1; /* Checksum Not Calculated */
    > + u32 ext2:1;
    > +
    > + u32 rssHash; /* RSS hash value */
    > +
    > + u32 len:14; /* data length */
    > + u32 err:1; /* Error */
    > + u32 ts:1; /* Tag is stripped */
    > + u32 tci:16; /* Tag stripped */
    > +
    > + u32 csum:16;
    > + u32 tuc:1; /* TCP/UDP Checksum Correct */
    > + u32 udp:1; /* UDP packet */
    > + u32 tcp:1; /* TCP packet */
    > + u32 ipc:1; /* IP Checksum Correct */
    > + u32 v6:1; /* IPv6 */
    > + u32 v4:1; /* IPv4 */
    > + u32 frg:1; /* IP Fragment */
    > + u32 fcs:1; /* Frame CRC correct */
    > + u32 type:7; /* completion type */
    > + u32 gen:1; /* generation bit */
    > +};
    > +
    > +/* fields in RxCompDesc we access via Vmxnet3_GenericDesc.dword[3] */
    > +#define VMXNET3_RCD_TUC_SHIFT 16
    > +#define VMXNET3_RCD_IPC_SHIFT 19
    > +
    > +/* fields in RxCompDesc we access via Vmxnet3_GenericDesc.qword[1] */
    > +#define VMXNET3_RCD_TYPE_SHIFT 56
    > +#define VMXNET3_RCD_GEN_SHIFT 63
    > +
    > +/* csum OK for TCP/UDP pkts over IP */
    > +#define VMXNET3_RCD_CSUM_OK (1 << VMXNET3_RCD_TUC_SHIFT | \
    > + 1 << VMXNET3_RCD_IPC_SHIFT)
    > +
    > +/* value of RxCompDesc.rssType */
    > +enum {
    > + VMXNET3_RCD_RSS_TYPE_NONE = 0,
    > + VMXNET3_RCD_RSS_TYPE_IPV4 = 1,
    > + VMXNET3_RCD_RSS_TYPE_TCPIPV4 = 2,
    > + VMXNET3_RCD_RSS_TYPE_IPV6 = 3,
    > + VMXNET3_RCD_RSS_TYPE_TCPIPV6 = 4,
    > +};
    > +
    > +
    > +/* a union for accessing all cmd/completion descriptors */
    > +union Vmxnet3_GenericDesc {
    > + u64 qword[2];
    > + u32 dword[4];
    > + u16 word[8];
    > + struct Vmxnet3_TxDesc txd;
    > + struct Vmxnet3_RxDesc rxd;
    > + struct Vmxnet3_TxCompDesc tcd;
    > + struct Vmxnet3_RxCompDesc rcd;
    > +};
    > +
    > +#define VMXNET3_INIT_GEN 1
    > +
    > +/* Max size of a single tx buffer */
    > +#define VMXNET3_MAX_TX_BUF_SIZE (1 << 14)
    > +
    > +/* # of tx desc needed for a tx buffer size */
    > +#define VMXNET3_TXD_NEEDED(size) (((size) + VMXNET3_MAX_TX_BUF_SIZE - 1) / \
    > + VMXNET3_MAX_TX_BUF_SIZE)
    > +
    > +/* max # of tx descs for a non-tso pkt */
    > +#define VMXNET3_MAX_TXD_PER_PKT 16
    > +
    > +/* Max size of a single rx buffer */
    > +#define VMXNET3_MAX_RX_BUF_SIZE ((1 << 14) - 1)
    > +/* Minimum size of a type 0 buffer */
    > +#define VMXNET3_MIN_T0_BUF_SIZE 128
    > +#define VMXNET3_MAX_CSUM_OFFSET 1024
    > +
    > +/* Ring base address alignment */
    > +#define VMXNET3_RING_BA_ALIGN 512
    > +#define VMXNET3_RING_BA_MASK (VMXNET3_RING_BA_ALIGN - 1)
    > +
    > +/* Ring size must be a multiple of 32 */
    > +#define VMXNET3_RING_SIZE_ALIGN 32
    > +#define VMXNET3_RING_SIZE_MASK (VMXNET3_RING_SIZE_ALIGN - 1)
    > +
    > +/* Max ring size */
    > +#define VMXNET3_TX_RING_MAX_SIZE 4096
    > +#define VMXNET3_TC_RING_MAX_SIZE 4096
    > +#define VMXNET3_RX_RING_MAX_SIZE 4096
    > +#define VMXNET3_RC_RING_MAX_SIZE 8192
    > +
    > +/* a list of reasons for queue stop */
    > +
    > +enum {
    > + VMXNET3_ERR_NOEOP = 0x80000000, /* cannot find the EOP desc of a pkt */
    > + VMXNET3_ERR_TXD_REUSE = 0x80000001, /* reuse TxDesc before tx completion */
    > + VMXNET3_ERR_BIG_PKT = 0x80000002, /* too many TxDesc for a pkt */
    > + VMXNET3_ERR_DESC_NOT_SPT = 0x80000003, /* descriptor type not supported */
    > + VMXNET3_ERR_SMALL_BUF = 0x80000004, /* type 0 buffer too small */
    > + VMXNET3_ERR_STRESS = 0x80000005, /* stress option firing in vmkernel */
    > + VMXNET3_ERR_SWITCH = 0x80000006, /* mode switch failure */
    > + VMXNET3_ERR_TXD_INVALID = 0x80000007, /* invalid TxDesc */
    > +};
    > +
    > +/* completion descriptor types */
    > +#define VMXNET3_CDTYPE_TXCOMP 0 /* Tx Completion Descriptor */
    > +#define VMXNET3_CDTYPE_RXCOMP 3 /* Rx Completion Descriptor */
    > +
    > +enum {
    > + VMXNET3_GOS_BITS_UNK = 0, /* unknown */
    > + VMXNET3_GOS_BITS_32 = 1,
    > + VMXNET3_GOS_BITS_64 = 2,
    > +};
    > +
    > +#define VMXNET3_GOS_TYPE_LINUX 1
    > +
    > +
    > +struct Vmxnet3_GOSInfo {
    > + u32 gosBits:2; /* 32-bit or 64-bit? */
    > + u32 gosType:4; /* which guest */
    > + u32 gosVer:16; /* gos version */
    > + u32 gosMisc:10; /* other info about gos */
    > +};
    > +
    > +
    > +struct Vmxnet3_DriverInfo {
    > + u32 version;
    > + struct Vmxnet3_GOSInfo gos;
    > + u32 vmxnet3RevSpt;
    > + u32 uptVerSpt;
    > +};
    > +
    > +
    > +#define VMXNET3_REV1_MAGIC 0xbabefee1
    > +
    > +/*
    > + * QueueDescPA must be 128 bytes aligned. It points to an array of
    > + * Vmxnet3_TxQueueDesc followed by an array of Vmxnet3_RxQueueDesc.
    > + * The number of Vmxnet3_TxQueueDesc/Vmxnet3_RxQueueDesc are specified by
    > + * Vmxnet3_MiscConf.numTxQueues/numRxQueues, respectively.
    > + */
    > +#define VMXNET3_QUEUE_DESC_ALIGN 128
    > +
    > +
    > +struct Vmxnet3_MiscConf {
    > + struct Vmxnet3_DriverInfo driverInfo;
    > + u64 uptFeatures;
    > + u64 ddPA; /* driver data PA */
    > + u64 queueDescPA; /* queue descriptor table PA */
    > + u32 ddLen; /* driver data len */
    > + u32 queueDescLen; /* queue desc. table len in bytes */
    > + u32 mtu;
    > + u16 maxNumRxSG;
    > + u8 numTxQueues;
    > + u8 numRxQueues;
    > + u32 reserved[4];
    > +};
    > +
    > +
    > +struct Vmxnet3_TxQueueConf {
    > + u64 txRingBasePA;
    > + u64 dataRingBasePA;
    > + u64 compRingBasePA;
    > + u64 ddPA; /* driver data */
    > + u64 reserved;
    > + u32 txRingSize; /* # of tx desc */
    > + u32 dataRingSize; /* # of data desc */
    > + u32 compRingSize; /* # of comp desc */
    > + u32 ddLen; /* size of driver data */
    > + u8 intrIdx;
    > + u8 _pad[7];
    > +};
    > +
    > +
    > +struct Vmxnet3_RxQueueConf {
    > + u64 rxRingBasePA[2];
    > + u64 compRingBasePA;
    > + u64 ddPA; /* driver data */
    > + u64 reserved;
    > + u32 rxRingSize[2]; /* # of rx desc */
    > + u32 compRingSize; /* # of rx comp desc */
    > + u32 ddLen; /* size of driver data */
    > + u8 intrIdx;
    > + u8 _pad[7];
    > +};
    > +
    > +
    > +enum vmxnet3_intr_mask_mode {
    > + VMXNET3_IMM_AUTO = 0,
    > + VMXNET3_IMM_ACTIVE = 1,
    > + VMXNET3_IMM_LAZY = 2
    > +};
    > +
    > +enum vmxnet3_intr_type {
    > + VMXNET3_IT_AUTO = 0,
    > + VMXNET3_IT_INTX = 1,
    > + VMXNET3_IT_MSI = 2,
    > + VMXNET3_IT_MSIX = 3
    > +};
    > +
    > +#define VMXNET3_MAX_TX_QUEUES 8
    > +#define VMXNET3_MAX_RX_QUEUES 16
    > +/* addition 1 for events */
    > +#define VMXNET3_MAX_INTRS 25
    > +
    > +
    > +struct Vmxnet3_IntrConf {
    > + bool autoMask;
    > + u8 numIntrs; /* # of interrupts */
    > + u8 eventIntrIdx;
    > + u8 modLevels[VMXNET3_MAX_INTRS]; /* moderation level for
    > + * each intr */
    > + u32 reserved[3];
    > +};
    > +
    > +/* one bit per VLAN ID, the size is in the units of u32 */
    > +#define VMXNET3_VFT_SIZE (4096 / (sizeof(u32) * 8))
    > +
    > +
    > +struct Vmxnet3_QueueStatus {
    > + bool stopped;
    > + u8 _pad[3];
    > + u32 error;
    > +};
    > +
    > +
    > +struct Vmxnet3_TxQueueCtrl {
    > + u32 txNumDeferred;
    > + u32 txThreshold;
    > + u64 reserved;
    > +};
    > +
    > +
    > +struct Vmxnet3_RxQueueCtrl {
    > + bool updateRxProd;
    > + u8 _pad[7];
    > + u64 reserved;
    > +};
    > +
    > +enum {
    > + VMXNET3_RXM_UCAST = 0x01, /* unicast only */
    > + VMXNET3_RXM_MCAST = 0x02, /* multicast passing the filters */
    > + VMXNET3_RXM_BCAST = 0x04, /* broadcast only */
    > + VMXNET3_RXM_ALL_MULTI = 0x08, /* all multicast */
    > + VMXNET3_RXM_PROMISC = 0x10 /* promiscuous */
    > +};
    > +
    > +struct Vmxnet3_RxFilterConf {
    > + u32 rxMode; /* VMXNET3_RXM_xxx */
    > + u16 mfTableLen; /* size of the multicast filter table */
    > + u16 _pad1;
    > + u64 mfTablePA; /* PA of the multicast filters table */
    > + u32 vfTable[VMXNET3_VFT_SIZE]; /* vlan filter */
    > +};
    > +
    > +
    > +#define VMXNET3_PM_MAX_FILTERS 6
    > +#define VMXNET3_PM_MAX_PATTERN_SIZE 128
    > +#define VMXNET3_PM_MAX_MASK_SIZE (VMXNET3_PM_MAX_PATTERN_SIZE / 8)
    > +
    > +#define VMXNET3_PM_WAKEUP_MAGIC 0x01 /* wake up on magic pkts */
    > +#define VMXNET3_PM_WAKEUP_FILTER 0x02 /* wake up on pkts matching
    > + * filters */
    > +
    > +
    > +struct Vmxnet3_PM_PktFilter {
    > + u8 maskSize;
    > + u8 patternSize;
    > + u8 mask[VMXNET3_PM_MAX_MASK_SIZE];
    > + u8 pattern[VMXNET3_PM_MAX_PATTERN_SIZE];
    > + u8 pad[6];
    > +};
    > +
    > +
    > +struct Vmxnet3_PMConf {
    > + u16 wakeUpEvents; /* VMXNET3_PM_WAKEUP_xxx */
    > + u8 numFilters;
    > + u8 pad[5];
    > + struct Vmxnet3_PM_PktFilter filters[VMXNET3_PM_MAX_FILTERS];
    > +};
    > +
    > +
    > +struct Vmxnet3_VariableLenConfDesc {
    > + u32 confVer;
    > + u32 confLen;
    > + u64 confPA;
    > +};
    > +
    > +
    > +struct Vmxnet3_TxQueueDesc {
    > + struct Vmxnet3_TxQueueCtrl ctrl;
    > + struct Vmxnet3_TxQueueConf conf;
    > +
    > + /* Driver read after a GET command */
    > + struct Vmxnet3_QueueStatus status;
    > + struct UPT1_TxStats stats;
    > + u8 _pad[88]; /* 128 aligned */
    > +};
    > +
    > +
    > +struct Vmxnet3_RxQueueDesc {
    > + struct Vmxnet3_RxQueueCtrl ctrl;
    > + struct Vmxnet3_RxQueueConf conf;
    > + /* Driver read after a GET commad */
    > + struct Vmxnet3_QueueStatus status;
    > + struct UPT1_RxStats stats;
    > + u8 __pad[88]; /* 128 aligned */
    > +};
    > +
    > +
    > +struct Vmxnet3_DSDevRead {
    > + /* read-only region for device, read by dev in response to a SET cmd */
    > + struct Vmxnet3_MiscConf misc;
    > + struct Vmxnet3_IntrConf intrConf;
    > + struct Vmxnet3_RxFilterConf rxFilterConf;
    > + struct Vmxnet3_VariableLenConfDesc rssConfDesc;
    > + struct Vmxnet3_VariableLenConfDesc pmConfDesc;
    > + struct Vmxnet3_VariableLenConfDesc pluginConfDesc;
    > +};
    > +
    > +/* All structures in DriverShared are padded to multiples of 8 bytes */
    > +struct Vmxnet3_DriverShared {
    > + u32 magic;
    > + /* make devRead start at 64bit boundaries */
    > + u32 pad;
    > + struct Vmxnet3_DSDevRead devRead;
    > + u32 ecr;
    > + u32 reserved[5];
    > +};
    > +
    > +
    > +#define VMXNET3_ECR_RQERR (1 << 0)
    > +#define VMXNET3_ECR_TQERR (1 << 1)
    > +#define VMXNET3_ECR_LINK (1 << 2)
    > +#define VMXNET3_ECR_DIC (1 << 3)
    > +#define VMXNET3_ECR_DEBUG (1 << 4)
    > +
    > +/* flip the gen bit of a ring */
    > +#define VMXNET3_FLIP_RING_GEN(gen) ((gen) = (gen) ^ 0x1)
    > +
    > +/* only use this if moving the idx won't affect the gen bit */
    > +#define VMXNET3_INC_RING_IDX_ONLY(idx, ring_size) \
    > + do {\
    > + (idx)++;\
    > + if (unlikely((idx) == (ring_size))) {\
    > + (idx) = 0;\
    > + } \
    > + } while (0)
    > +
    > +#define VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid) \
    > + (vfTable[vid >> 5] |= (1 << (vid & 31)))
    > +#define VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid) \
    > + (vfTable[vid >> 5] &= ~(1 << (vid & 31)))
    > +
    > +#define VMXNET3_VFTABLE_ENTRY_IS_SET(vfTable, vid) \
    > + ((vfTable[vid >> 5] & (1 << (vid & 31))) != 0)
    > +
    > +#define VMXNET3_MAX_MTU 9000
    > +#define VMXNET3_MIN_MTU 60
    > +
    > +#define VMXNET3_LINK_UP (10000 << 16 | 1) /* 10 Gbps, up */
    > +#define VMXNET3_LINK_DOWN 0
    > +
    > +#endif /* _VMXNET3_DEFS_H_ */
    > diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
    > new file mode 100644
    > index 0000000..a886f24
    > --- /dev/null
    > +++ b/drivers/net/vmxnet3/vmxnet3_drv.c
    > @@ -0,0 +1,2553 @@
    > +/*
    > + * Linux driver for VMware's vmxnet3 ethernet NIC.
    > + *
    > + * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved.
    > + *
    > + * This program is free software; you can redistribute it and/or modify it
    > + * under the terms of the GNU General Public License as published by the
    > + * Free Software Foundation; version 2 of the License and no later version.
    > + *
    > + * This program is distributed in the hope that it will be useful, but
    > + * WITHOUT ANY WARRANTY; without even the implied warranty of
    > + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
    > + * NON INFRINGEMENT. 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".
    > + *
    > + * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com>
    > + *
    > + */
    > +
    > +#include "vmxnet3_int.h"
    > +
    > +char vmxnet3_driver_name[] = "vmxnet3";
    > +#define VMXNET3_DRIVER_DESC "VMware vmxnet3 virtual NIC driver"
    > +
    > +
    > +/*
    > + * PCI Device ID Table
    > + * Last entry must be all 0s
    > + */
    > +static const struct pci_device_id vmxnet3_pciid_table[] = {
    > + {PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_VMXNET3)},
    > + {0}
    > +};
    > +
    > +MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table);
    > +
    > +static atomic_t devices_found;
    > +
    > +
    > +/*
    > + * Enable/Disable the given intr
    > + */
    > +static void
    > +vmxnet3_enable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
    > +{
    > + VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0);
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_disable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
    > +{
    > + VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1);
    > +}
    > +
    > +
    > +/*
    > + * Enable/Disable all intrs used by the device
    > + */
    > +static void
    > +vmxnet3_enable_all_intrs(struct vmxnet3_adapter *adapter)
    > +{
    > + int i;
    > +
    > + for (i = 0; i < adapter->intr.num_intrs; i++)
    > + vmxnet3_enable_intr(adapter, i);
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter)
    > +{
    > + int i;
    > +
    > + for (i = 0; i < adapter->intr.num_intrs; i++)
    > + vmxnet3_disable_intr(adapter, i);
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events)
    > +{
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events);
    > +}
    > +
    > +
    > +static bool
    > +vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
    > +{
    > + return netif_queue_stopped(adapter->netdev);
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
    > +{
    > + tq->stopped = false;
    > + netif_start_queue(adapter->netdev);
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
    > +{
    > + tq->stopped = false;
    > + netif_wake_queue(adapter->netdev);
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
    > +{
    > + tq->stopped = true;
    > + tq->num_stop++;
    > + netif_stop_queue(adapter->netdev);
    > +}
    > +
    > +
    > +/*
    > + * Check the link state. This may start or stop the tx queue.
    > + */
    > +static void
    > +vmxnet3_check_link(struct vmxnet3_adapter *adapter)
    > +{
    > + u32 ret;
    > +
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK);
    > + ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
    > + adapter->link_speed = ret >> 16;
    > + if (ret & 1) { /* Link is up. */
    > + printk(KERN_INFO "%s: NIC Link is Up %d Mbps\n",
    > + adapter->netdev->name, adapter->link_speed);
    > + if (!netif_carrier_ok(adapter->netdev))
    > + netif_carrier_on(adapter->netdev);
    > +
    > + vmxnet3_tq_start(&adapter->tx_queue, adapter);
    > + } else {
    > + printk(KERN_INFO "%s: NIC Link is Down\n",
    > + adapter->netdev->name);
    > + if (netif_carrier_ok(adapter->netdev))
    > + netif_carrier_off(adapter->netdev);
    > +
    > + vmxnet3_tq_stop(&adapter->tx_queue, adapter);
    > + }
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_process_events(struct vmxnet3_adapter *adapter)
    > +{
    > + u32 events = adapter->shared->ecr;
    > + if (!events)
    > + return;
    > +
    > + vmxnet3_ack_events(adapter, events);
    > +
    > + /* Check if link state has changed */
    > + if (events & VMXNET3_ECR_LINK)
    > + vmxnet3_check_link(adapter);
    > +
    > + /* Check if there is an error on xmit/recv queues */
    > + if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) {
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_GET_QUEUE_STATUS);
    > +
    > + if (adapter->tqd_start->status.stopped) {
    > + printk(KERN_ERR "%s: tq error 0x%x\n",
    > + adapter->netdev->name,
    > + adapter->tqd_start->status.error);
    > + }
    > + if (adapter->rqd_start->status.stopped) {
    > + printk(KERN_ERR "%s: rq error 0x%x\n",
    > + adapter->netdev->name,
    > + adapter->rqd_start->status.error);
    > + }
    > +
    > + schedule_work(&adapter->work);
    > + }
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi,
    > + struct pci_dev *pdev)
    > +{
    > + if (tbi->map_type == VMXNET3_MAP_SINGLE)
    > + pci_unmap_single(pdev, tbi->dma_addr, tbi->len,
    > + PCI_DMA_TODEVICE);
    > + else if (tbi->map_type == VMXNET3_MAP_PAGE)
    > + pci_unmap_page(pdev, tbi->dma_addr, tbi->len,
    > + PCI_DMA_TODEVICE);
    > + else
    > + BUG_ON(tbi->map_type != VMXNET3_MAP_NONE);
    > +
    > + tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq,
    > + struct pci_dev *pdev, struct vmxnet3_adapter *adapter)
    > +{
    > + struct sk_buff *skb;
    > + int entries = 0;
    > +
    > + /* no out of order completion */
    > + BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp);
    > + BUG_ON(tq->tx_ring.base[eop_idx].txd.eop != 1);
    > +
    > + skb = tq->buf_info[eop_idx].skb;
    > + BUG_ON(skb == NULL);
    > + tq->buf_info[eop_idx].skb = NULL;
    > +
    > + VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size);
    > +
    > + while (tq->tx_ring.next2comp != eop_idx) {
    > + vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp,
    > + pdev);
    > +
    > + /* update next2comp w/o tx_lock. Since we are marking more,
    > + * instead of less, tx ring entries avail, the worst case is
    > + * that the tx routine incorrectly re-queues a pkt due to
    > + * insufficient tx ring entries.
    > + */
    > + vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
    > + entries++;
    > + }
    > +
    > + dev_kfree_skb_any(skb);
    > + return entries;
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq,
    > + struct vmxnet3_adapter *adapter)
    > +{
    > + int completed = 0;
    > + union Vmxnet3_GenericDesc *gdesc;
    > +
    > + gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
    > + while (gdesc->tcd.gen == tq->comp_ring.gen) {
    > + completed += vmxnet3_unmap_pkt(gdesc->tcd.txdIdx, tq,
    > + adapter->pdev, adapter);
    > +
    > + vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring);
    > + gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
    > + }
    > +
    > + if (completed) {
    > + spin_lock(&tq->tx_lock);
    > + if (unlikely(vmxnet3_tq_stopped(tq, adapter) &&
    > + vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) >
    > + VMXNET3_WAKE_QUEUE_THRESHOLD(tq) &&
    > + netif_carrier_ok(adapter->netdev))) {
    > + vmxnet3_tq_wake(tq, adapter);
    > + }
    > + spin_unlock(&tq->tx_lock);
    > + }
    > + return completed;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq,
    > + struct vmxnet3_adapter *adapter)
    > +{
    > + int i;
    > +
    > + while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) {
    > + struct vmxnet3_tx_buf_info *tbi;
    > + union Vmxnet3_GenericDesc *gdesc;
    > +
    > + tbi = tq->buf_info + tq->tx_ring.next2comp;
    > + gdesc = tq->tx_ring.base + tq->tx_ring.next2comp;
    > +
    > + vmxnet3_unmap_tx_buf(tbi, adapter->pdev);
    > + if (tbi->skb) {
    > + dev_kfree_skb_any(tbi->skb);
    > + tbi->skb = NULL;
    > + }
    > + vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
    > + }
    > +
    > + /* sanity check, verify all buffers are indeed unmapped and freed */
    > + for (i = 0; i < tq->tx_ring.size; i++) {
    > + BUG_ON(tq->buf_info[i].skb != NULL ||
    > + tq->buf_info[i].map_type != VMXNET3_MAP_NONE);
    > + }
    > +
    > + tq->tx_ring.gen = VMXNET3_INIT_GEN;
    > + tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
    > +
    > + tq->comp_ring.gen = VMXNET3_INIT_GEN;
    > + tq->comp_ring.next2proc = 0;
    > +}
    > +
    > +
    > +void
    > +vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq,
    > + struct vmxnet3_adapter *adapter)
    > +{
    > + if (tq->tx_ring.base) {
    > + pci_free_consistent(adapter->pdev, tq->tx_ring.size *
    > + sizeof(struct Vmxnet3_TxDesc),
    > + tq->tx_ring.base, tq->tx_ring.basePA);
    > + tq->tx_ring.base = NULL;
    > + }
    > + if (tq->data_ring.base) {
    > + pci_free_consistent(adapter->pdev, tq->data_ring.size *
    > + sizeof(struct Vmxnet3_TxDataDesc),
    > + tq->data_ring.base, tq->data_ring.basePA);
    > + tq->data_ring.base = NULL;
    > + }
    > + if (tq->comp_ring.base) {
    > + pci_free_consistent(adapter->pdev, tq->comp_ring.size *
    > + sizeof(struct Vmxnet3_TxCompDesc),
    > + tq->comp_ring.base, tq->comp_ring.basePA);
    > + tq->comp_ring.base = NULL;
    > + }
    > + kfree(tq->buf_info);
    > + tq->buf_info = NULL;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_tq_init(struct vmxnet3_tx_queue *tq,
    > + struct vmxnet3_adapter *adapter)
    > +{
    > + int i;
    > +
    > + /* reset the tx ring contents to 0 and reset the tx ring states */
    > + memset(tq->tx_ring.base, 0, tq->tx_ring.size *
    > + sizeof(struct Vmxnet3_TxDesc));
    > + tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
    > + tq->tx_ring.gen = VMXNET3_INIT_GEN;
    > +
    > + memset(tq->data_ring.base, 0, tq->data_ring.size *
    > + sizeof(struct Vmxnet3_TxDataDesc));
    > +
    > + /* reset the tx comp ring contents to 0 and reset comp ring states */
    > + memset(tq->comp_ring.base, 0, tq->comp_ring.size *
    > + sizeof(struct Vmxnet3_TxCompDesc));
    > + tq->comp_ring.next2proc = 0;
    > + tq->comp_ring.gen = VMXNET3_INIT_GEN;
    > +
    > + /* reset the bookkeeping data */
    > + memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size);
    > + for (i = 0; i < tq->tx_ring.size; i++)
    > + tq->buf_info[i].map_type = VMXNET3_MAP_NONE;
    > +
    > + /* stats are not reset */
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_tq_create(struct vmxnet3_tx_queue *tq,
    > + struct vmxnet3_adapter *adapter)
    > +{
    > + BUG_ON(tq->tx_ring.base || tq->data_ring.base ||
    > + tq->comp_ring.base || tq->buf_info);
    > +
    > + tq->tx_ring.base = pci_alloc_consistent(adapter->pdev, tq->tx_ring.size
    > + * sizeof(struct Vmxnet3_TxDesc),
    > + &tq->tx_ring.basePA);
    > + if (!tq->tx_ring.base) {
    > + printk(KERN_ERR "%s: failed to allocate tx ring\n",
    > + adapter->netdev->name);
    > + goto err;
    > + }
    > +
    > + tq->data_ring.base = pci_alloc_consistent(adapter->pdev,
    > + tq->data_ring.size *
    > + sizeof(struct Vmxnet3_TxDataDesc),
    > + &tq->data_ring.basePA);
    > + if (!tq->data_ring.base) {
    > + printk(KERN_ERR "%s: failed to allocate data ring\n",
    > + adapter->netdev->name);
    > + goto err;
    > + }
    > +
    > + tq->comp_ring.base = pci_alloc_consistent(adapter->pdev,
    > + tq->comp_ring.size *
    > + sizeof(struct Vmxnet3_TxCompDesc),
    > + &tq->comp_ring.basePA);
    > + if (!tq->comp_ring.base) {
    > + printk(KERN_ERR "%s: failed to allocate tx comp ring\n",
    > + adapter->netdev->name);
    > + goto err;
    > + }
    > +
    > + tq->buf_info = kcalloc(tq->tx_ring.size, sizeof(tq->buf_info[0]),
    > + GFP_KERNEL);
    > + if (!tq->buf_info) {
    > + printk(KERN_ERR "%s: failed to allocate tx bufinfo\n",
    > + adapter->netdev->name);
    > + goto err;
    > + }
    > +
    > + return 0;
    > +
    > +err:
    > + vmxnet3_tq_destroy(tq, adapter);
    > + return -ENOMEM;
    > +}
    > +
    > +
    > +/*
    > + * starting from ring->next2fill, allocate rx buffers for the given ring
    > + * of the rx queue and update the rx desc. stop after @num_to_alloc buffers
    > + * are allocated or allocation fails
    > + */
    > +
    > +static int
    > +vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx,
    > + int num_to_alloc, struct vmxnet3_adapter *adapter)
    > +{
    > + int num_allocated = 0;
    > + struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx];
    > + struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx];
    > + u32 val;
    > +
    > + while (num_allocated < num_to_alloc) {
    > + struct vmxnet3_rx_buf_info *rbi;
    > + union Vmxnet3_GenericDesc *gd;
    > +
    > + rbi = rbi_base + ring->next2fill;
    > + gd = ring->base + ring->next2fill;
    > +
    > + if (rbi->buf_type == VMXNET3_RX_BUF_SKB) {
    > + if (rbi->skb == NULL) {
    > + rbi->skb = dev_alloc_skb(rbi->len +
    > + NET_IP_ALIGN);
    > + if (unlikely(rbi->skb == NULL)) {
    > + rq->stats.rx_buf_alloc_failure++;
    > + break;
    > + }
    > + rbi->skb->dev = adapter->netdev;
    > +
    > + skb_reserve(rbi->skb, NET_IP_ALIGN);
    > + rbi->dma_addr = pci_map_single(adapter->pdev,
    > + rbi->skb->data, rbi->len,
    > + PCI_DMA_FROMDEVICE);
    > + } else {
    > + /* rx buffer skipped by the device */
    > + }
    > + val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT;
    > + } else {
    > + BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE ||
    > + rbi->len != PAGE_SIZE);
    > +
    > + if (rbi->page == NULL) {
    > + rbi->page = alloc_page(GFP_ATOMIC);
    > + if (unlikely(rbi->page == NULL)) {
    > + rq->stats.rx_buf_alloc_failure++;
    > + break;
    > + }
    > + rbi->dma_addr = pci_map_page(adapter->pdev,
    > + rbi->page, 0, PAGE_SIZE,
    > + PCI_DMA_FROMDEVICE);
    > + } else {
    > + /* rx buffers skipped by the device */
    > + }
    > + val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT;
    > + }
    > +
    > + BUG_ON(rbi->dma_addr == 0);
    > + gd->rxd.addr = rbi->dma_addr;
    > + gd->dword[2] = (ring->gen << VMXNET3_RXD_GEN_SHIFT) | val |
    > + rbi->len;
    > +
    > + num_allocated++;
    > + vmxnet3_cmd_ring_adv_next2fill(ring);
    > + }
    > + rq->uncommitted[ring_idx] += num_allocated;
    > +
    > + dprintk(KERN_ERR "alloc_rx_buf: %d allocated, next2fill %u, next2comp "
    > + "%u, uncommited %u\n", num_allocated, ring->next2fill,
    > + ring->next2comp, rq->uncommitted[ring_idx]);
    > +
    > + /* so that the device can distinguish a full ring and an empty ring */
    > + BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp);
    > +
    > + return num_allocated;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd,
    > + struct vmxnet3_rx_buf_info *rbi)
    > +{
    > + struct skb_frag_struct *frag = skb_shinfo(skb)->frags +
    > + skb_shinfo(skb)->nr_frags;
    > +
    > + BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS);
    > +
    > + frag->page = rbi->page;
    > + frag->page_offset = 0;
    > + frag->size = rcd->len;
    > + skb->data_len += frag->size;
    > + skb_shinfo(skb)->nr_frags++;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx,
    > + struct vmxnet3_tx_queue *tq, struct pci_dev *pdev,
    > + struct vmxnet3_adapter *adapter)
    > +{
    > + u32 dw2, len;
    > + unsigned long buf_offset;
    > + int i;
    > + union Vmxnet3_GenericDesc *gdesc;
    > + struct vmxnet3_tx_buf_info *tbi = NULL;
    > +
    > + BUG_ON(ctx->copy_size > skb_headlen(skb));
    > +
    > + /* use the previous gen bit for the SOP desc */
    > + dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT;
    > +
    > + ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill;
    > + gdesc = ctx->sop_txd; /* both loops below can be skipped */
    > +
    > + /* no need to map the buffer if headers are copied */
    > + if (ctx->copy_size) {
    > + ctx->sop_txd->txd.addr = tq->data_ring.basePA +
    > + tq->tx_ring.next2fill *
    > + sizeof(struct Vmxnet3_TxDataDesc);
    > + ctx->sop_txd->dword[2] = dw2 | ctx->copy_size;
    > + ctx->sop_txd->dword[3] = 0;
    > +
    > + tbi = tq->buf_info + tq->tx_ring.next2fill;
    > + tbi->map_type = VMXNET3_MAP_NONE;
    > +
    > + dprintk(KERN_ERR "txd[%u]: 0x%Lx 0x%x 0x%x\n",
    > + tq->tx_ring.next2fill, ctx->sop_txd->txd.addr,
    > + ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]);
    > + vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
    > +
    > + /* use the right gen for non-SOP desc */
    > + dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
    > + }
    > +
    > + /* linear part can use multiple tx desc if it's big */
    > + len = skb_headlen(skb) - ctx->copy_size;
    > + buf_offset = ctx->copy_size;
    > + while (len) {
    > + u32 buf_size;
    > +
    > + buf_size = len > VMXNET3_MAX_TX_BUF_SIZE ?
    > + VMXNET3_MAX_TX_BUF_SIZE : len;
    > +
    > + tbi = tq->buf_info + tq->tx_ring.next2fill;
    > + tbi->map_type = VMXNET3_MAP_SINGLE;
    > + tbi->dma_addr = pci_map_single(adapter->pdev,
    > + skb->data + buf_offset, buf_size,
    > + PCI_DMA_TODEVICE);
    > +
    > + tbi->len = buf_size; /* this automatically convert 2^14 to 0 */
    > +
    > + gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
    > + BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
    > +
    > + gdesc->txd.addr = tbi->dma_addr;
    > + gdesc->dword[2] = dw2 | buf_size;
    > + gdesc->dword[3] = 0;
    > +
    > + dprintk(KERN_ERR "txd[%u]: 0x%Lx 0x%x 0x%x\n",
    > + tq->tx_ring.next2fill, gdesc->txd.addr,
    > + gdesc->dword[2], gdesc->dword[3]);
    > + vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
    > + dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
    > +
    > + len -= buf_size;
    > + buf_offset += buf_size;
    > + }
    > +
    > + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
    > + struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
    > +
    > + tbi = tq->buf_info + tq->tx_ring.next2fill;
    > + tbi->map_type = VMXNET3_MAP_PAGE;
    > + tbi->dma_addr = pci_map_page(adapter->pdev, frag->page,
    > + frag->page_offset, frag->size,
    > + PCI_DMA_TODEVICE);
    > +
    > + tbi->len = frag->size;
    > +
    > + gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
    > + BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
    > +
    > + gdesc->txd.addr = tbi->dma_addr;
    > + gdesc->dword[2] = dw2 | frag->size;
    > + gdesc->dword[3] = 0;
    > +
    > + dprintk(KERN_ERR "txd[%u]: 0x%llu %u %u\n",
    > + tq->tx_ring.next2fill, gdesc->txd.addr,
    > + gdesc->dword[2], gdesc->dword[3]);
    > + vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
    > + dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
    > + }
    > +
    > + ctx->eop_txd = gdesc;
    > +
    > + /* set the last buf_info for the pkt */
    > + tbi->skb = skb;
    > + tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base;
    > +}
    > +
    > +
    > +/*
    > + * parse and copy relevant protocol headers:
    > + * For a tso pkt, relevant headers are L2/3/4 including options
    > + * For a pkt requesting csum offloading, they are L2/3 and may include L4
    > + * if it's a TCP/UDP pkt
    > + *
    > + * Returns:
    > + * -1: error happens during parsing
    > + * 0: protocol headers parsed, but too big to be copied
    > + * 1: protocol headers parsed and copied
    > + *
    > + * Other effects:
    > + * 1. related *ctx fields are updated.
    > + * 2. ctx->copy_size is # of bytes copied
    > + * 3. the portion copied is guaranteed to be in the linear part
    > + *
    > + */
    > +static int
    > +vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
    > + struct vmxnet3_tx_ctx *ctx,
    > + struct vmxnet3_adapter *adapter)
    > +{
    > + struct Vmxnet3_TxDataDesc *tdd;
    > +
    > + if (ctx->mss) {
    > + ctx->eth_ip_hdr_size = skb_transport_offset(skb);
    > + ctx->l4_hdr_size = ((struct tcphdr *)
    > + skb_transport_header(skb))->doff * 4;
    > + ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size;
    > + } else {
    > + unsigned int pull_size;
    > +
    > + if (skb->ip_summed == CHECKSUM_PARTIAL) {
    > + ctx->eth_ip_hdr_size = skb_transport_offset(skb);
    > +
    > + if (ctx->ipv4) {
    > + struct iphdr *iph = (struct iphdr *)
    > + skb_network_header(skb);
    > + if (iph->protocol == IPPROTO_TCP) {
    > + pull_size = ctx->eth_ip_hdr_size +
    > + sizeof(struct tcphdr);
    > +
    > + if (unlikely(!pskb_may_pull(skb,
    > + pull_size))) {
    > + goto err;
    > + }
    > + ctx->l4_hdr_size = ((struct tcphdr *)
    > + skb_transport_header(skb))->doff * 4;
    > + } else if (iph->protocol == IPPROTO_UDP) {
    > + ctx->l4_hdr_size =
    > + sizeof(struct udphdr);
    > + } else {
    > + ctx->l4_hdr_size = 0;
    > + }
    > + } else {
    > + /* for simplicity, don't copy L4 headers */
    > + ctx->l4_hdr_size = 0;
    > + }
    > + ctx->copy_size = ctx->eth_ip_hdr_size +
    > + ctx->l4_hdr_size;
    > + } else {
    > + ctx->eth_ip_hdr_size = 0;
    > + ctx->l4_hdr_size = 0;
    > + /* copy as much as allowed */
    > + ctx->copy_size = min((unsigned int)VMXNET3_HDR_COPY_SIZE
    > + , skb_headlen(skb));
    > + }
    > +
    > + /* make sure headers are accessible directly */
    > + if (unlikely(!pskb_may_pull(skb, ctx->copy_size)))
    > + goto err;
    > + }
    > +
    > + if (unlikely(ctx->copy_size > VMXNET3_HDR_COPY_SIZE)) {
    > + tq->stats.oversized_hdr++;
    > + ctx->copy_size = 0;
    > + return 0;
    > + }
    > +
    > + tdd = tq->data_ring.base + tq->tx_ring.next2fill;
    > +
    > + memcpy(tdd->data, skb->data, ctx->copy_size);
    > + dprintk(KERN_ERR "copy %u bytes to dataRing[%u]\n",
    > + ctx->copy_size, tq->tx_ring.next2fill);
    > + return 1;
    > +
    > +err:
    > + return -1;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_prepare_tso(struct sk_buff *skb,
    > + struct vmxnet3_tx_ctx *ctx)
    > +{
    > + struct tcphdr *tcph = (struct tcphdr *)skb_transport_header(skb);
    > + if (ctx->ipv4) {
    > + struct iphdr *iph = (struct iphdr *)skb_network_header(skb);
    > + iph->check = 0;
    > + tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
    > + IPPROTO_TCP, 0);
    > + } else {
    > + struct ipv6hdr *iph = (struct ipv6hdr *)skb_network_header(skb);
    > + tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0,
    > + IPPROTO_TCP, 0);
    > + }
    > +}
    > +
    > +
    > +/*
    > + * Transmits a pkt thru a given tq
    > + * Returns:
    > + * NETDEV_TX_OK: descriptors are setup successfully
    > + * NETDEV_TX_OK: error occured, the pkt is dropped
    > + * NETDEV_TX_BUSY: tx ring is full, queue is stopped
    > + *
    > + * Side-effects:
    > + * 1. tx ring may be changed
    > + * 2. tq stats may be updated accordingly
    > + * 3. shared->txNumDeferred may be updated
    > + */
    > +
    > +static int
    > +vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
    > + struct vmxnet3_adapter *adapter, struct net_device *netdev)
    > +{
    > + int ret;
    > + u32 count;
    > + unsigned long flags;
    > + struct vmxnet3_tx_ctx ctx;
    > + union Vmxnet3_GenericDesc *gdesc;
    > +
    > + /* conservatively estimate # of descriptors to use */
    > + count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) +
    > + skb_shinfo(skb)->nr_frags + 1;
    > +
    > + ctx.ipv4 = (skb->protocol == __constant_ntohs(ETH_P_IP));
    > +
    > + ctx.mss = skb_shinfo(skb)->gso_size;
    > + if (ctx.mss) {
    > + if (skb_header_cloned(skb)) {
    > + if (unlikely(pskb_expand_head(skb, 0, 0,
    > + GFP_ATOMIC) != 0)) {
    > + tq->stats.drop_tso++;
    > + goto drop_pkt;
    > + }
    > + tq->stats.copy_skb_header++;
    > + }
    > + vmxnet3_prepare_tso(skb, &ctx);
    > + } else {
    > + if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) {
    > +
    > + /* non-tso pkts must not use more than
    > + * VMXNET3_MAX_TXD_PER_PKT entries
    > + */
    > + if (skb_linearize(skb) != 0) {
    > + tq->stats.drop_too_many_frags++;
    > + goto drop_pkt;
    > + }
    > + tq->stats.linearized++;
    > +
    > + /* recalculate the # of descriptors to use */
    > + count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
    > + }
    > + }
    > +
    > + ret = vmxnet3_parse_and_copy_hdr(skb, tq, &ctx, adapter);
    > + if (ret >= 0) {
    > + BUG_ON(ret <= 0 && ctx.copy_size != 0);
    > + /* hdrs parsed, check against other limits */
    > + if (ctx.mss) {
    > + if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size >
    > + VMXNET3_MAX_TX_BUF_SIZE)) {
    > + goto hdr_too_big;
    > + }
    > + } else {
    > + if (skb->ip_summed == CHECKSUM_PARTIAL) {
    > + if (unlikely(ctx.eth_ip_hdr_size +
    > + skb->csum_offset >
    > + VMXNET3_MAX_CSUM_OFFSET)) {
    > + goto hdr_too_big;
    > + }
    > + }
    > + }
    > + } else {
    > + tq->stats.drop_hdr_inspect_err++;
    > + goto drop_pkt;
    > + }
    > +
    > + spin_lock_irqsave(&tq->tx_lock, flags);
    > +
    > + if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) {
    > + tq->stats.tx_ring_full++;
    > + dprintk(KERN_ERR "tx queue stopped on %s, next2comp %u"
    > + " next2fill %u\n", adapter->netdev->name,
    > + tq->tx_ring.next2comp, tq->tx_ring.next2fill);
    > +
    > + vmxnet3_tq_stop(tq, adapter);
    > + spin_unlock_irqrestore(&tq->tx_lock, flags);
    > + return NETDEV_TX_BUSY;
    > + }
    > +
    > + /* fill tx descs related to addr & len */
    > + vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter);
    > +
    > + /* setup the EOP desc */
    > + ctx.eop_txd->dword[3] = VMXNET3_TXD_CQ | VMXNET3_TXD_EOP;
    > +
    > + /* setup the SOP desc */
    > + gdesc = ctx.sop_txd;
    > + if (ctx.mss) {
    > + gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size;
    > + gdesc->txd.om = VMXNET3_OM_TSO;
    > + gdesc->txd.msscof = ctx.mss;
    > + tq->shared->txNumDeferred += (skb->len - gdesc->txd.hlen +
    > + ctx.mss - 1) / ctx.mss;
    > + } else {
    > + if (skb->ip_summed == CHECKSUM_PARTIAL) {
    > + gdesc->txd.hlen = ctx.eth_ip_hdr_size;
    > + gdesc->txd.om = VMXNET3_OM_CSUM;
    > + gdesc->txd.msscof = ctx.eth_ip_hdr_size +
    > + skb->csum_offset;
    > + } else {
    > + gdesc->txd.om = 0;
    > + gdesc->txd.msscof = 0;
    > + }
    > + tq->shared->txNumDeferred++;
    > + }
    > +
    > + if (vlan_tx_tag_present(skb)) {
    > + gdesc->txd.ti = 1;
    > + gdesc->txd.tci = vlan_tx_tag_get(skb);
    > + }
    > +
    > + wmb();
    > +
    > + /* finally flips the GEN bit of the SOP desc */
    > + gdesc->dword[2] ^= VMXNET3_TXD_GEN;
    > + dprintk(KERN_ERR "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n",
    > + (u32)((union Vmxnet3_GenericDesc *)ctx.sop_txd -
    > + tq->tx_ring.base), gdesc->txd.addr, gdesc->dword[2],
    > + gdesc->dword[3]);
    > +
    > + spin_unlock_irqrestore(&tq->tx_lock, flags);
    > +
    > + if (tq->shared->txNumDeferred >= tq->shared->txThreshold) {
    > + tq->shared->txNumDeferred = 0;
    > + VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_TXPROD,
    > + tq->tx_ring.next2fill);
    > + }
    > + netdev->trans_start = jiffies;
    > +
    > + return NETDEV_TX_OK;
    > +
    > +hdr_too_big:
    > + tq->stats.drop_oversized_hdr++;
    > +drop_pkt:
    > + tq->stats.drop_total++;
    > + dev_kfree_skb(skb);
    > + return NETDEV_TX_OK;
    > +}
    > +
    > +
    > +static netdev_tx_t
    > +vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > + struct vmxnet3_tx_queue *tq = &adapter->tx_queue;
    > +
    > + return vmxnet3_tq_xmit(skb, tq, adapter, netdev);
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_rx_csum(struct vmxnet3_adapter *adapter,
    > + struct sk_buff *skb,
    > + union Vmxnet3_GenericDesc *gdesc)
    > +{
    > + if (!gdesc->rcd.cnc && adapter->rxcsum) {
    > + /* typical case: TCP/UDP over IP and both csums are correct */
    > + if ((gdesc->dword[3] & VMXNET3_RCD_CSUM_OK) ==
    > + VMXNET3_RCD_CSUM_OK) {
    > + skb->ip_summed = CHECKSUM_UNNECESSARY;
    > + BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
    > + BUG_ON(!(gdesc->rcd.v4 || gdesc->rcd.v6));
    > + BUG_ON(gdesc->rcd.frg);
    > + } else {
    > + if (gdesc->rcd.csum) {
    > + skb->csum = htons(gdesc->rcd.csum);
    > + skb->ip_summed = CHECKSUM_PARTIAL;
    > + } else {
    > + skb->ip_summed = CHECKSUM_NONE;
    > + }
    > + }
    > + } else {
    > + skb->ip_summed = CHECKSUM_NONE;
    > + }
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd,
    > + struct vmxnet3_rx_ctx *ctx, struct vmxnet3_adapter *adapter)
    > +{
    > + rq->stats.drop_err++;
    > + if (!rcd->fcs)
    > + rq->stats.drop_fcs++;
    > +
    > + rq->stats.drop_total++;
    > +
    > + /*
    > + * We do not unmap and chain the rx buffer to the skb.
    > + * We basically pretend this buffer is not used and will be recycled
    > + * by vmxnet3_rq_alloc_rx_buf()
    > + */
    > +
    > + /*
    > + * ctx->skb may be NULL if this is the first and the only one
    > + * desc for the pkt
    > + */
    > + if (ctx->skb)
    > + dev_kfree_skb_irq(ctx->skb);
    > +
    > + ctx->skb = NULL;
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq,
    > + struct vmxnet3_adapter *adapter, int quota)
    > +{
    > + static u32 rxprod_reg[2] = {VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2};
    > + u32 num_rxd = 0;
    > + struct Vmxnet3_RxCompDesc *rcd;
    > + struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx;
    > +
    > + rcd = &rq->comp_ring.base[rq->comp_ring.next2proc].rcd;
    > + while (rcd->gen == rq->comp_ring.gen) {
    > + struct vmxnet3_rx_buf_info *rbi;
    > + struct sk_buff *skb;
    > + int num_to_alloc;
    > + struct Vmxnet3_RxDesc *rxd;
    > + u32 idx, ring_idx;
    > +
    > + if (num_rxd >= quota) {
    > + /* we may stop even before we see the EOP desc of
    > + * the current pkt
    > + */
    > + break;
    > + }
    > + num_rxd++;
    > +
    > + idx = rcd->rxdIdx;
    > + ring_idx = rcd->rqID == rq->qid ? 0 : 1;
    > +
    > + rxd = &rq->rx_ring[ring_idx].base[idx].rxd;
    > + rbi = rq->buf_info[ring_idx] + idx;
    > +
    > + BUG_ON(rxd->addr != rbi->dma_addr || rxd->len != rbi->len);
    > +
    > + if (unlikely(rcd->eop && rcd->err)) {
    > + vmxnet3_rx_error(rq, rcd, ctx, adapter);
    > + goto rcd_done;
    > + }
    > +
    > + if (rcd->sop) { /* first buf of the pkt */
    > + BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD ||
    > + rcd->rqID != rq->qid);
    > +
    > + BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB);
    > + BUG_ON(ctx->skb != NULL || rbi->skb == NULL);
    > +
    > + if (unlikely(rcd->len == 0)) {
    > + /* Pretend the rx buffer is skipped. */
    > + BUG_ON(!(rcd->sop && rcd->eop));
    > + dprintk(KERN_ERR "rxRing[%u][%u] 0 length\n",
    > + ring_idx, idx);
    > + goto rcd_done;
    > + }
    > +
    > + ctx->skb = rbi->skb;
    > + rbi->skb = NULL;
    > +
    > + pci_unmap_single(adapter->pdev, rbi->dma_addr, rbi->len,
    > + PCI_DMA_FROMDEVICE);
    > +
    > + skb_put(ctx->skb, rcd->len);
    > + } else {
    > + BUG_ON(ctx->skb == NULL);
    > + /* non SOP buffer must be type 1 in most cases */
    > + if (rbi->buf_type == VMXNET3_RX_BUF_PAGE) {
    > + BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY);
    > +
    > + if (rcd->len) {
    > + pci_unmap_page(adapter->pdev,
    > + rbi->dma_addr, rbi->len,
    > + PCI_DMA_FROMDEVICE);
    > +
    > + vmxnet3_append_frag(ctx->skb, rcd, rbi);
    > + rbi->page = NULL;
    > + }
    > + } else {
    > + /*
    > + * The only time a non-SOP buffer is type 0 is
    > + * when it's EOP and error flag is raised, which
    > + * has already been handled.
    > + */
    > + BUG_ON(true);
    > + }
    > + }
    > +
    > + skb = ctx->skb;
    > + if (rcd->eop) {
    > + skb->len += skb->data_len;
    > + skb->truesize += skb->data_len;
    > +
    > + vmxnet3_rx_csum(adapter, skb,
    > + (union Vmxnet3_GenericDesc *)rcd);
    > + skb->protocol = eth_type_trans(skb, adapter->netdev);
    > +
    > + if (unlikely(adapter->vlan_grp && rcd->ts)) {
    > + vlan_hwaccel_receive_skb(skb,
    > + adapter->vlan_grp, rcd->tci);
    > + } else {
    > + netif_receive_skb(skb);
    > + }
    > +
    > + adapter->netdev->last_rx = jiffies;
    > + ctx->skb = NULL;
    > + }
    > +
    > +rcd_done:
    > + /* device may skip some rx descs */
    > + rq->rx_ring[ring_idx].next2comp = idx;
    > + VMXNET3_INC_RING_IDX_ONLY(rq->rx_ring[ring_idx].next2comp,
    > + rq->rx_ring[ring_idx].size);
    > +
    > + /* refill rx buffers frequently to avoid starving the h/w */
    > + num_to_alloc = vmxnet3_cmd_ring_desc_avail(rq->rx_ring +
    > + ring_idx);
    > + if (unlikely(num_to_alloc > VMXNET3_RX_ALLOC_THRESHOLD(rq,
    > + ring_idx, adapter))) {
    > + vmxnet3_rq_alloc_rx_buf(rq, ring_idx, num_to_alloc,
    > + adapter);
    > +
    > + /* if needed, update the register */
    > + if (unlikely(rq->shared->updateRxProd)) {
    > + VMXNET3_WRITE_BAR0_REG(adapter,
    > + rxprod_reg[ring_idx] + rq->qid * 8,
    > + rq->rx_ring[ring_idx].next2fill);
    > + rq->uncommitted[ring_idx] = 0;
    > + }
    > + }
    > +
    > + vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring);
    > + rcd = &rq->comp_ring.base[rq->comp_ring.next2proc].rcd;
    > + }
    > +
    > + return num_rxd;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq,
    > + struct vmxnet3_adapter *adapter)
    > +{
    > + u32 i, ring_idx;
    > + struct Vmxnet3_RxDesc *rxd;
    > +
    > + for (ring_idx = 0; ring_idx < 2; ring_idx++) {
    > + for (i = 0; i < rq->rx_ring[ring_idx].size; i++) {
    > + rxd = &rq->rx_ring[ring_idx].base[i].rxd;
    > +
    > + if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD &&
    > + rq->buf_info[ring_idx][i].skb) {
    > + pci_unmap_single(adapter->pdev, rxd->addr,
    > + rxd->len, PCI_DMA_FROMDEVICE);
    > + dev_kfree_skb(rq->buf_info[ring_idx][i].skb);
    > + rq->buf_info[ring_idx][i].skb = NULL;
    > + } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY &&
    > + rq->buf_info[ring_idx][i].page) {
    > + pci_unmap_page(adapter->pdev, rxd->addr,
    > + rxd->len, PCI_DMA_FROMDEVICE);
    > + put_page(rq->buf_info[ring_idx][i].page);
    > + rq->buf_info[ring_idx][i].page = NULL;
    > + }
    > + }
    > +
    > + rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN;
    > + rq->rx_ring[ring_idx].next2fill =
    > + rq->rx_ring[ring_idx].next2comp = 0;
    > + rq->uncommitted[ring_idx] = 0;
    > + }
    > +
    > + rq->comp_ring.gen = VMXNET3_INIT_GEN;
    > + rq->comp_ring.next2proc = 0;
    > +}
    > +
    > +
    > +void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
    > + struct vmxnet3_adapter *adapter)
    > +{
    > + int i;
    > + int j;
    > +
    > + /* all rx buffers must have already been freed */
    > + for (i = 0; i < 2; i++) {
    > + if (rq->buf_info[i]) {
    > + for (j = 0; j < rq->rx_ring[i].size; j++)
    > + BUG_ON(rq->buf_info[i][j].page != NULL);
    > + }
    > + }
    > +
    > +
    > + kfree(rq->buf_info[0]);
    > +
    > + for (i = 0; i < 2; i++) {
    > + if (rq->rx_ring[i].base) {
    > + pci_free_consistent(adapter->pdev, rq->rx_ring[i].size
    > + * sizeof(struct Vmxnet3_RxDesc),
    > + rq->rx_ring[i].base,
    > + rq->rx_ring[i].basePA);
    > + rq->rx_ring[i].base = NULL;
    > + }
    > + rq->buf_info[i] = NULL;
    > + }
    > +
    > + if (rq->comp_ring.base) {
    > + pci_free_consistent(adapter->pdev, rq->comp_ring.size *
    > + sizeof(struct Vmxnet3_RxCompDesc),
    > + rq->comp_ring.base, rq->comp_ring.basePA);
    > + rq->comp_ring.base = NULL;
    > + }
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_rq_init(struct vmxnet3_rx_queue *rq,
    > + struct vmxnet3_adapter *adapter)
    > +{
    > + int i;
    > +
    > + /* initialize buf_info */
    > + for (i = 0; i < rq->rx_ring[0].size; i++) {
    > +
    > + /* 1st buf for a pkt is skbuff */
    > + if (i % adapter->rx_buf_per_pkt == 0) {
    > + rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB;
    > + rq->buf_info[0][i].len = adapter->skb_buf_size;
    > + } else { /* subsequent bufs for a pkt is frag */
    > + rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE;
    > + rq->buf_info[0][i].len = PAGE_SIZE;
    > + }
    > + }
    > + for (i = 0; i < rq->rx_ring[1].size; i++) {
    > + rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE;
    > + rq->buf_info[1][i].len = PAGE_SIZE;
    > + }
    > +
    > + /* reset internal state and allocate buffers for both rings */
    > + for (i = 0; i < 2; i++) {
    > + rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0;
    > + rq->uncommitted[i] = 0;
    > +
    > + memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size *
    > + sizeof(struct Vmxnet3_RxDesc));
    > + rq->rx_ring[i].gen = VMXNET3_INIT_GEN;
    > + }
    > + if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1,
    > + adapter) == 0) {
    > + /* at least has 1 rx buffer for the 1st ring */
    > + return -ENOMEM;
    > + }
    > + vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter);
    > +
    > + /* reset the comp ring */
    > + rq->comp_ring.next2proc = 0;
    > + memset(rq->comp_ring.base, 0, rq->comp_ring.size *
    > + sizeof(struct Vmxnet3_RxCompDesc));
    > + rq->comp_ring.gen = VMXNET3_INIT_GEN;
    > +
    > + /* reset rxctx */
    > + rq->rx_ctx.skb = NULL;
    > +
    > + /* stats are not reset */
    > + return 0;
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter)
    > +{
    > + int i;
    > + size_t sz;
    > + struct vmxnet3_rx_buf_info *bi;
    > +
    > + for (i = 0; i < 2; i++) {
    > +
    > + sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc);
    > + rq->rx_ring[i].base = pci_alloc_consistent(adapter->pdev, sz,
    > + &rq->rx_ring[i].basePA);
    > + if (!rq->rx_ring[i].base) {
    > + printk(KERN_ERR "%s: failed to allocate rx ring %d\n",
    > + adapter->netdev->name, i);
    > + goto err;
    > + }
    > + }
    > +
    > + sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc);
    > + rq->comp_ring.base = pci_alloc_consistent(adapter->pdev, sz,
    > + &rq->comp_ring.basePA);
    > + if (!rq->comp_ring.base) {
    > + printk(KERN_ERR "%s: failed to allocate rx comp ring\n",
    > + adapter->netdev->name);
    > + goto err;
    > + }
    > +
    > + sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size +
    > + rq->rx_ring[1].size);
    > + bi = kmalloc(sz, GFP_KERNEL);
    > + if (!bi) {
    > + printk(KERN_ERR "%s: failed to allocate rx bufinfo\n",
    > + adapter->netdev->name);
    > + goto err;
    > + }
    > + memset(bi, 0, sz);
    > + rq->buf_info[0] = bi;
    > + rq->buf_info[1] = bi + rq->rx_ring[0].size;
    > +
    > + return 0;
    > +
    > +err:
    > + vmxnet3_rq_destroy(rq, adapter);
    > + return -ENOMEM;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget, int *txd_done,
    > + int *rxd_done)
    > +{
    > + if (unlikely(adapter->shared->ecr))
    > + vmxnet3_process_events(adapter);
    > +
    > + *txd_done = vmxnet3_tq_tx_complete(&adapter->tx_queue, adapter);
    > + *rxd_done = vmxnet3_rq_rx_complete(&adapter->rx_queue, adapter, budget);
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_poll(struct napi_struct *napi, int budget)
    > +{
    > + struct vmxnet3_adapter *adapter = container_of(napi,
    > + struct vmxnet3_adapter, napi);
    > + int rxd_done, txd_done;
    > +
    > + vmxnet3_do_poll(adapter, budget, &txd_done, &rxd_done);
    > +
    > + if (rxd_done < budget) {
    > + napi_complete(napi);
    > + vmxnet3_enable_intr(adapter, 0);
    > + }
    > + return rxd_done;
    > +}
    > +
    > +
    > +/* Interrupt handler for vmxnet3 */
    > +static irqreturn_t
    > +vmxnet3_intr(int irq, void *dev_id)
    > +{
    > + struct net_device *dev = dev_id;
    > + struct vmxnet3_adapter *adapter = netdev_priv(dev);
    > +
    > + if (unlikely(adapter->intr.type == VMXNET3_IT_INTX)) {
    > + u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR);
    > + if (unlikely(icr == 0))
    > + /* not ours */
    > + return IRQ_NONE;
    > + }
    > +
    > +
    > + /* disable intr if needed */
    > + if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
    > + vmxnet3_disable_intr(adapter, 0);
    > +
    > + napi_schedule(&adapter->napi);
    > +
    > + return IRQ_HANDLED;
    > +}
    > +
    > +#ifdef CONFIG_NET_POLL_CONTROLLER
    > +
    > +
    > +/* netpoll callback. */
    > +static void
    > +vmxnet3_netpoll(struct net_device *netdev)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > + int irq;
    > +
    > + if (adapter->intr.type == VMXNET3_IT_MSIX)
    > + irq = adapter->intr.msix_entries[0].vector;
    > + else
    > + irq = adapter->pdev->irq;
    > +
    > + disable_irq(irq);
    > + vmxnet3_intr(irq, netdev);
    > + enable_irq(irq);
    > +}
    > +#endif
    > +
    > +static int
    > +vmxnet3_request_irqs(struct vmxnet3_adapter *adapter)
    > +{
    > + int err;
    > +
    > + if (adapter->intr.type == VMXNET3_IT_MSIX) {
    > + /* we only use 1 MSI-X vector */
    > + err = request_irq(adapter->intr.msix_entries[0].vector,
    > + vmxnet3_intr, 0, adapter->netdev->name,
    > + adapter->netdev);
    > + } else if (adapter->intr.type == VMXNET3_IT_MSI) {
    > + err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0,
    > + adapter->netdev->name, adapter->netdev);
    > + } else {
    > + err = request_irq(adapter->pdev->irq, vmxnet3_intr,
    > + IRQF_SHARED, adapter->netdev->name,
    > + adapter->netdev);
    > + }
    > +
    > + if (err)
    > + printk(KERN_ERR "Failed to request irq %s (intr type:%d), error"
    > + ":%d\n", adapter->netdev->name, adapter->intr.type, err);
    > +
    > +
    > + if (!err) {
    > + int i;
    > + /* init our intr settings */
    > + for (i = 0; i < adapter->intr.num_intrs; i++)
    > + adapter->intr.mod_levels[i] = UPT1_IML_ADAPTIVE;
    > +
    > + /* next setup intr index for all intr sources */
    > + adapter->tx_queue.comp_ring.intr_idx = 0;
    > + adapter->rx_queue.comp_ring.intr_idx = 0;
    > + adapter->intr.event_intr_idx = 0;
    > +
    > + printk(KERN_INFO "%s: intr type %u, mode %u, %u vectors "
    > + "allocated\n", adapter->netdev->name, adapter->intr.type,
    > + adapter->intr.mask_mode, adapter->intr.num_intrs);
    > + }
    > +
    > + return err;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_free_irqs(struct vmxnet3_adapter *adapter)
    > +{
    > + BUG_ON(adapter->intr.type == VMXNET3_IT_AUTO ||
    > + adapter->intr.num_intrs <= 0);
    > +
    > + switch (adapter->intr.type) {
    > + case VMXNET3_IT_MSIX:
    > + {
    > + int i;
    > +
    > + for (i = 0; i < adapter->intr.num_intrs; i++)
    > + free_irq(adapter->intr.msix_entries[i].vector,
    > + adapter->netdev);
    > + break;
    > + }
    > + case VMXNET3_IT_MSI:
    > + free_irq(adapter->pdev->irq, adapter->netdev);
    > + break;
    > + case VMXNET3_IT_INTX:
    > + free_irq(adapter->pdev->irq, adapter->netdev);
    > + break;
    > + default:
    > + BUG_ON(true);
    > + }
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > + struct Vmxnet3_DriverShared *shared = adapter->shared;
    > + u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
    > +
    > + if (grp) {
    > + /* add vlan rx stripping. */
    > + if (adapter->netdev->features & NETIF_F_HW_VLAN_RX) {
    > + int i;
    > + struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
    > + adapter->vlan_grp = grp;
    > +
    > + /* update FEATURES to device */
    > + devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_UPDATE_FEATURE);
    > + /*
    > + * Clear entire vfTable; then enable untagged pkts.
    > + * Note: setting one entry in vfTable to non-zero turns
    > + * on VLAN rx filtering.
    > + */
    > + for (i = 0; i < VMXNET3_VFT_SIZE; i++)
    > + vfTable[i] = 0;
    > +
    > + VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0);
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_UPDATE_VLAN_FILTERS);
    > + } else {
    > + printk(KERN_ERR "%s: vlan_rx_register when device has "
    > + "no NETIF_F_HW_VLAN_RX\n", netdev->name);
    > + }
    > + } else {
    > + /* remove vlan rx stripping. */
    > + struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
    > + adapter->vlan_grp = NULL;
    > +
    > + if (devRead->misc.uptFeatures & UPT1_F_RXVLAN) {
    > + int i;
    > +
    > + for (i = 0; i < VMXNET3_VFT_SIZE; i++) {
    > + /* clear entire vfTable; this also disables
    > + * VLAN rx filtering
    > + */
    > + vfTable[i] = 0;
    > + }
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_UPDATE_VLAN_FILTERS);
    > +
    > + /* update FEATURES to device */
    > + devRead->misc.uptFeatures &= ~UPT1_F_RXVLAN;
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_UPDATE_FEATURE);
    > + }
    > + }
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter)
    > +{
    > + if (adapter->vlan_grp) {
    > + u16 vid;
    > + u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
    > + bool activeVlan = false;
    > +
    > + for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
    > + if (vlan_group_get_device(adapter->vlan_grp, vid)) {
    > + VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
    > + activeVlan = true;
    > + }
    > + }
    > + if (activeVlan) {
    > + /* continue to allow untagged pkts */
    > + VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0);
    > + }
    > + }
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > + u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
    > +
    > + VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_UPDATE_VLAN_FILTERS);
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > + u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
    > +
    > + VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid);
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_UPDATE_VLAN_FILTERS);
    > +}
    > +
    > +
    > +static u8 *
    > +vmxnet3_copy_mc(struct net_device *netdev)
    > +{
    > + u8 *buf = NULL;
    > + u32 sz = netdev->mc_count * ETH_ALEN;
    > +
    > + /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */
    > + if (sz <= 0xffff) {
    > + /* We may be called with BH disabled */
    > + buf = kmalloc(sz, GFP_ATOMIC);
    > + if (buf) {
    > + int i;
    > + struct dev_mc_list *mc = netdev->mc_list;
    > +
    > + for (i = 0; i < netdev->mc_count; i++) {
    > + BUG_ON(!mc);
    > + memcpy(buf + i * ETH_ALEN, mc->dmi_addr,
    > + ETH_ALEN);
    > + mc = mc->next;
    > + }
    > + }
    > + }
    > + return buf;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_set_mc(struct net_device *netdev)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > + struct Vmxnet3_RxFilterConf *rxConf =
    > + &adapter->shared->devRead.rxFilterConf;
    > + u8 *new_table = NULL;
    > + u32 new_mode = VMXNET3_RXM_UCAST;
    > +
    > + if (netdev->flags & IFF_PROMISC)
    > + new_mode |= VMXNET3_RXM_PROMISC;
    > +
    > + if (netdev->flags & IFF_BROADCAST)
    > + new_mode |= VMXNET3_RXM_BCAST;
    > +
    > + if (netdev->flags & IFF_ALLMULTI)
    > + new_mode |= VMXNET3_RXM_ALL_MULTI;
    > + else
    > + if (netdev->mc_count > 0) {
    > + new_table = vmxnet3_copy_mc(netdev);
    > + if (new_table) {
    > + new_mode |= VMXNET3_RXM_MCAST;
    > + rxConf->mfTableLen = netdev->mc_count *
    > + ETH_ALEN;
    > + rxConf->mfTablePA = virt_to_phys(new_table);
    > + } else {
    > + printk(KERN_INFO "%s: failed to copy mcast list"
    > + ", setting ALL_MULTI\n", netdev->name);
    > + new_mode |= VMXNET3_RXM_ALL_MULTI;
    > + }
    > + }
    > +
    > +
    > + if (!(new_mode & VMXNET3_RXM_MCAST)) {
    > + rxConf->mfTableLen = 0;
    > + rxConf->mfTablePA = 0;
    > + }
    > +
    > + if (new_mode != rxConf->rxMode) {
    > + rxConf->rxMode = new_mode;
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_UPDATE_RX_MODE);
    > + }
    > +
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_UPDATE_MAC_FILTERS);
    > +
    > + kfree(new_table);
    > +}
    > +
    > +
    > +/*
    > + * Set up driver_shared based on settings in adapter.
    > + */
    > +
    > +static void
    > +vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter)
    > +{
    > + struct Vmxnet3_DriverShared *shared = adapter->shared;
    > + struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
    > + struct Vmxnet3_TxQueueConf *tqc;
    > + struct Vmxnet3_RxQueueConf *rqc;
    > + int i;
    > +
    > + memset(shared, 0, sizeof(*shared));
    > +
    > + /* driver settings */
    > + shared->magic = VMXNET3_REV1_MAGIC;
    > + devRead->misc.driverInfo.version = VMXNET3_DRIVER_VERSION_NUM;
    > + devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ?
    > + VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64);
    > + devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX;
    > + devRead->misc.driverInfo.vmxnet3RevSpt = 1;
    > + devRead->misc.driverInfo.uptVerSpt = 1;
    > +
    > + devRead->misc.ddPA = virt_to_phys(adapter);
    > + devRead->misc.ddLen = sizeof(struct vmxnet3_adapter);
    > +
    > + /* set up feature flags */
    > + if (adapter->rxcsum)
    > + devRead->misc.uptFeatures |= UPT1_F_RXCSUM;
    > +
    > + if (adapter->lro) {
    > + devRead->misc.uptFeatures |= UPT1_F_LRO;
    > + devRead->misc.maxNumRxSG = 1 + MAX_SKB_FRAGS;
    > + }
    > + if ((adapter->netdev->features & NETIF_F_HW_VLAN_RX)
    > + && adapter->vlan_grp) {
    > + devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
    > + }
    > +
    > + devRead->misc.mtu = adapter->netdev->mtu;
    > + devRead->misc.queueDescPA = adapter->queue_desc_pa;
    > + devRead->misc.queueDescLen = sizeof(struct Vmxnet3_TxQueueDesc) +
    > + sizeof(struct Vmxnet3_RxQueueDesc);
    > +
    > + /* tx queue settings */
    > + BUG_ON(adapter->tx_queue.tx_ring.base == NULL);
    > +
    > + devRead->misc.numTxQueues = 1;
    > + tqc = &adapter->tqd_start->conf;
    > + tqc->txRingBasePA = adapter->tx_queue.tx_ring.basePA;
    > + tqc->dataRingBasePA = adapter->tx_queue.data_ring.basePA;
    > + tqc->compRingBasePA = adapter->tx_queue.comp_ring.basePA;
    > + tqc->ddPA = virt_to_phys(adapter->tx_queue.buf_info);
    > + tqc->txRingSize = adapter->tx_queue.tx_ring.size;
    > + tqc->dataRingSize = adapter->tx_queue.data_ring.size;
    > + tqc->compRingSize = adapter->tx_queue.comp_ring.size;
    > + tqc->ddLen = sizeof(struct vmxnet3_tx_buf_info) *
    > + tqc->txRingSize;
    > + tqc->intrIdx = adapter->tx_queue.comp_ring.intr_idx;
    > +
    > + /* rx queue settings */
    > + devRead->misc.numRxQueues = 1;
    > + rqc = &adapter->rqd_start->conf;
    > + rqc->rxRingBasePA[0] = adapter->rx_queue.rx_ring[0].basePA;
    > + rqc->rxRingBasePA[1] = adapter->rx_queue.rx_ring[1].basePA;
    > + rqc->compRingBasePA = adapter->rx_queue.comp_ring.basePA;
    > + rqc->ddPA = virt_to_phys(adapter->rx_queue.buf_info);
    > + rqc->rxRingSize[0] = adapter->rx_queue.rx_ring[0].size;
    > + rqc->rxRingSize[1] = adapter->rx_queue.rx_ring[1].size;
    > + rqc->compRingSize = adapter->rx_queue.comp_ring.size;
    > + rqc->ddLen = sizeof(struct vmxnet3_rx_buf_info) *
    > + (rqc->rxRingSize[0] + rqc->rxRingSize[1]);
    > + rqc->intrIdx = adapter->rx_queue.comp_ring.intr_idx;
    > +
    > + /* intr settings */
    > + devRead->intrConf.autoMask = adapter->intr.mask_mode ==
    > + VMXNET3_IMM_AUTO;
    > + devRead->intrConf.numIntrs = adapter->intr.num_intrs;
    > + for (i = 0; i < adapter->intr.num_intrs; i++)
    > + devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i];
    > +
    > + devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx;
    > +
    > + /* rx filter settings */
    > + devRead->rxFilterConf.rxMode = 0;
    > + vmxnet3_restore_vlan(adapter);
    > + /* the rest are already zeroed */
    > +}
    > +
    > +
    > +int
    > +vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
    > +{
    > + int err;
    > + u32 ret;
    > +
    > + dprintk(KERN_ERR "%s: skb_buf_size %d, rx_buf_per_pkt %d, ring sizes"
    > + " %u %u %u\n", adapter->netdev->name, adapter->skb_buf_size,
    > + adapter->rx_buf_per_pkt, adapter->tx_queue.tx_ring.size,
    > + adapter->rx_queue.rx_ring[0].size,
    > + adapter->rx_queue.rx_ring[1].size);
    > +
    > + vmxnet3_tq_init(&adapter->tx_queue, adapter);
    > + err = vmxnet3_rq_init(&adapter->rx_queue, adapter);
    > + if (err) {
    > + printk(KERN_ERR "Failed to init rx queue for %s: error %d\n",
    > + adapter->netdev->name, err);
    > + goto rq_err;
    > + }
    > +
    > + err = vmxnet3_request_irqs(adapter);
    > + if (err) {
    > + printk(KERN_ERR "Failed to setup irq for %s: error %d\n",
    > + adapter->netdev->name, err);
    > + goto irq_err;
    > + }
    > +
    > + vmxnet3_setup_driver_shared(adapter);
    > +
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL,
    > + VMXNET3_GET_ADDR_LO(adapter->shared_pa));
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH,
    > + VMXNET3_GET_ADDR_HI(adapter->shared_pa));
    > +
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_ACTIVATE_DEV);
    > + ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
    > +
    > + if (ret != 0) {
    > + printk(KERN_ERR "Failed to activate dev %s: error %u\n",
    > + adapter->netdev->name, ret);
    > + err = -EINVAL;
    > + goto activate_err;
    > + }
    > + VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_RXPROD,
    > + adapter->rx_queue.rx_ring[0].next2fill);
    > + VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_RXPROD2,
    > + adapter->rx_queue.rx_ring[1].next2fill);
    > +
    > + /* Apply the rx filter settins last. */
    > + vmxnet3_set_mc(adapter->netdev);
    > +
    > + /*
    > + * Check link state when first activating device. It will start the
    > + * tx queue if the link is up.
    > + */
    > + vmxnet3_check_link(adapter);
    > +
    > + napi_enable(&adapter->napi);
    > + vmxnet3_enable_all_intrs(adapter);
    > + clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
    > + return 0;
    > +
    > +activate_err:
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0);
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0);
    > + vmxnet3_free_irqs(adapter);
    > +irq_err:
    > +rq_err:
    > + /* free up buffers we allocated */
    > + vmxnet3_rq_cleanup(&adapter->rx_queue, adapter);
    > + return err;
    > +}
    > +
    > +
    > +void
    > +vmxnet3_reset_dev(struct vmxnet3_adapter *adapter)
    > +{
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV);
    > +}
    > +
    > +
    > +int
    > +vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter)
    > +{
    > + if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state))
    > + return 0;
    > +
    > +
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_QUIESCE_DEV);
    > + vmxnet3_disable_all_intrs(adapter);
    > +
    > + napi_disable(&adapter->napi);
    > + netif_tx_disable(adapter->netdev);
    > + adapter->link_speed = 0;
    > + netif_carrier_off(adapter->netdev);
    > +
    > + vmxnet3_tq_cleanup(&adapter->tx_queue, adapter);
    > + vmxnet3_rq_cleanup(&adapter->rx_queue, adapter);
    > + vmxnet3_free_irqs(adapter);
    > + return 0;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
    > +{
    > + u32 tmp;
    > +
    > + tmp = *(u32 *)mac;
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp);
    > +
    > + tmp = (mac[5] << 8) | mac[4];
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp);
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_set_mac_addr(struct net_device *netdev, void *p)
    > +{
    > + struct sockaddr *addr = p;
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > +
    > + memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
    > + vmxnet3_write_mac_addr(adapter, addr->sa_data);
    > +
    > + return 0;
    > +}
    > +
    > +
    > +/* ==================== initialization and cleanup routines ============ */
    > +
    > +static int
    > +vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64)
    > +{
    > + int err;
    > + unsigned long mmio_start, mmio_len;
    > + struct pci_dev *pdev = adapter->pdev;
    > +
    > + err = pci_enable_device(pdev);
    > + if (err) {
    > + printk(KERN_ERR "Failed to enable adapter %s: error %d\n",
    > + pci_name(pdev), err);
    > + return err;
    > + }
    > +
    > + if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
    > + if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
    > + printk(KERN_ERR "pci_set_consistent_dma_mask failed "
    > + "for adapter %s\n", pci_name(pdev));
    > + err = -EIO;
    > + goto err_set_mask;
    > + }
    > + *dma64 = true;
    > + } else {
    > + if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
    > + printk(KERN_ERR "pci_set_dma_mask failed for adapter "
    > + "%s\n", pci_name(pdev));
    > + err = -EIO;
    > + goto err_set_mask;
    > + }
    > + *dma64 = false;
    > + }
    > +
    > + err = pci_request_selected_regions(pdev, (1 << 2) - 1,
    > + vmxnet3_driver_name);
    > + if (err) {
    > + printk(KERN_ERR "Failed to request region for adapter %s: "
    > + "error %d\n", pci_name(pdev), err);
    > + goto err_set_mask;
    > + }
    > +
    > + pci_set_master(pdev);
    > +
    > + mmio_start = pci_resource_start(pdev, 0);
    > + mmio_len = pci_resource_len(pdev, 0);
    > + adapter->hw_addr0 = ioremap(mmio_start, mmio_len);
    > + if (!adapter->hw_addr0) {
    > + printk(KERN_ERR "Failed to map bar0 for adapter %s\n",
    > + pci_name(pdev));
    > + err = -EIO;
    > + goto err_ioremap;
    > + }
    > +
    > + mmio_start = pci_resource_start(pdev, 1);
    > + mmio_len = pci_resource_len(pdev, 1);
    > + adapter->hw_addr1 = ioremap(mmio_start, mmio_len);
    > + if (!adapter->hw_addr1) {
    > + printk(KERN_ERR "Failed to map bar1 for adapter %s\n",
    > + pci_name(pdev));
    > + err = -EIO;
    > + goto err_bar1;
    > + }
    > + return 0;
    > +
    > +err_bar1:
    > + iounmap(adapter->hw_addr0);
    > +err_ioremap:
    > + pci_release_selected_regions(pdev, (1 << 2) - 1);
    > +err_set_mask:
    > + pci_disable_device(pdev);
    > + return err;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter)
    > +{
    > + BUG_ON(!adapter->pdev);
    > +
    > + iounmap(adapter->hw_addr0);
    > + iounmap(adapter->hw_addr1);
    > + pci_release_selected_regions(adapter->pdev, (1 << 2) - 1);
    > + pci_disable_device(adapter->pdev);
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter)
    > +{
    > + size_t sz;
    > +
    > + if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE -
    > + VMXNET3_MAX_ETH_HDR_SIZE) {
    > + adapter->skb_buf_size = adapter->netdev->mtu +
    > + VMXNET3_MAX_ETH_HDR_SIZE;
    > + if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE)
    > + adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE;
    > +
    > + adapter->rx_buf_per_pkt = 1;
    > + } else {
    > + adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE;
    > + sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE +
    > + VMXNET3_MAX_ETH_HDR_SIZE;
    > + adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE;
    > + }
    > +
    > + /*
    > + * for simplicity, force the ring0 size to be a multiple of
    > + * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
    > + */
    > + sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
    > + adapter->rx_queue.rx_ring[0].size = (adapter->rx_queue.rx_ring[0].size +
    > + sz - 1) / sz * sz;
    > + adapter->rx_queue.rx_ring[0].size = min_t(u32,
    > + adapter->rx_queue.rx_ring[0].size,
    > + VMXNET3_RX_RING_MAX_SIZE / sz * sz);
    > +}
    > +
    > +
    > +int
    > +vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size,
    > + u32 rx_ring_size, u32 rx_ring2_size)
    > +{
    > + int err;
    > +
    > + adapter->tx_queue.tx_ring.size = tx_ring_size;
    > + adapter->tx_queue.data_ring.size = tx_ring_size;
    > + adapter->tx_queue.comp_ring.size = tx_ring_size;
    > + adapter->tx_queue.shared = &adapter->tqd_start->ctrl;
    > + adapter->tx_queue.stopped = true;
    > + err = vmxnet3_tq_create(&adapter->tx_queue, adapter);
    > + if (err)
    > + return err;
    > +
    > + adapter->rx_queue.rx_ring[0].size = rx_ring_size;
    > + adapter->rx_queue.rx_ring[1].size = rx_ring2_size;
    > + vmxnet3_adjust_rx_ring_size(adapter);
    > + adapter->rx_queue.comp_ring.size = adapter->rx_queue.rx_ring[0].size +
    > + adapter->rx_queue.rx_ring[1].size;
    > + adapter->rx_queue.qid = 0;
    > + adapter->rx_queue.qid2 = 1;
    > + adapter->rx_queue.shared = &adapter->rqd_start->ctrl;
    > + err = vmxnet3_rq_create(&adapter->rx_queue, adapter);
    > + if (err)
    > + vmxnet3_tq_destroy(&adapter->tx_queue, adapter);
    > +
    > + return err;
    > +}
    > +
    > +static int
    > +vmxnet3_open(struct net_device *netdev)
    > +{
    > + struct vmxnet3_adapter *adapter;
    > + int err;
    > +
    > + adapter = netdev_priv(netdev);
    > +
    > + spin_lock_init(&adapter->tx_queue.tx_lock);
    > +
    > + err = vmxnet3_create_queues(adapter, VMXNET3_DEF_TX_RING_SIZE,
    > + VMXNET3_DEF_RX_RING_SIZE,
    > + VMXNET3_DEF_RX_RING_SIZE);
    > + if (err)
    > + goto queue_err;
    > +
    > + err = vmxnet3_activate_dev(adapter);
    > + if (err)
    > + goto activate_err;
    > +
    > + return 0;
    > +
    > +activate_err:
    > + vmxnet3_rq_destroy(&adapter->rx_queue, adapter);
    > + vmxnet3_tq_destroy(&adapter->tx_queue, adapter);
    > +queue_err:
    > + return err;
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_close(struct net_device *netdev)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > +
    > + /*
    > + * Reset_work may be in the middle of resetting the device, wait for its
    > + * completion.
    > + */
    > + while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
    > + msleep(1);
    > +
    > + vmxnet3_quiesce_dev(adapter);
    > +
    > + vmxnet3_rq_destroy(&adapter->rx_queue, adapter);
    > + vmxnet3_tq_destroy(&adapter->tx_queue, adapter);
    > +
    > + clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
    > +
    > +
    > + return 0;
    > +}
    > +
    > +
    > +void
    > +vmxnet3_force_close(struct vmxnet3_adapter *adapter)
    > +{
    > + /*
    > + * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise
    > + * vmxnet3_close() will deadlock.
    > + */
    > + BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state));
    > +
    > + /* we need to enable NAPI, otherwise dev_close will deadlock */
    > + napi_enable(&adapter->napi);
    > + dev_close(adapter->netdev);
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_change_mtu(struct net_device *netdev, int new_mtu)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > + int err = 0;
    > +
    > + if (new_mtu < VMXNET3_MIN_MTU || new_mtu > VMXNET3_MAX_MTU)
    > + return -EINVAL;
    > +
    > + if (new_mtu > 1500 && !adapter->jumbo_frame)
    > + return -EINVAL;
    > +
    > + netdev->mtu = new_mtu;
    > +
    > + /*
    > + * Reset_work may be in the middle of resetting the device, wait for its
    > + * completion.
    > + */
    > + while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
    > + msleep(1);
    > +
    > + if (netif_running(netdev)) {
    > + vmxnet3_quiesce_dev(adapter);
    > + vmxnet3_reset_dev(adapter);
    > +
    > + /* we need to re-create the rx queue based on the new mtu */
    > + vmxnet3_rq_destroy(&adapter->rx_queue, adapter);
    > + vmxnet3_adjust_rx_ring_size(adapter);
    > + adapter->rx_queue.comp_ring.size =
    > + adapter->rx_queue.rx_ring[0].size +
    > + adapter->rx_queue.rx_ring[1].size;
    > + err = vmxnet3_rq_create(&adapter->rx_queue, adapter);
    > + if (err) {
    > + printk(KERN_ERR "%s: failed to re-create rx queue,"
    > + " error %d. Closing it.\n", netdev->name, err);
    > + goto out;
    > + }
    > +
    > + err = vmxnet3_activate_dev(adapter);
    > + if (err) {
    > + printk(KERN_ERR "%s: failed to re-activate, error %d. "
    > + "Closing it\n", netdev->name, err);
    > + goto out;
    > + }
    > + }
    > +
    > +out:
    > + clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
    > + if (err)
    > + vmxnet3_force_close(adapter);
    > +
    > + return err;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64)
    > +{
    > + struct net_device *netdev = adapter->netdev;
    > +
    > + netdev->features = NETIF_F_SG |
    > + NETIF_F_HW_CSUM |
    > + NETIF_F_HW_VLAN_TX |
    > + NETIF_F_HW_VLAN_RX |
    > + NETIF_F_HW_VLAN_FILTER |
    > + NETIF_F_TSO |
    > + NETIF_F_TSO6 |
    > + NETIF_F_LRO;
    > +
    > + printk(KERN_INFO "features: sg csum vlan jf tso tsoIPv6 lro");
    > +
    > + adapter->rxcsum = true;
    > + adapter->jumbo_frame = true;
    > + adapter->lro = true;
    > +
    > + if (dma64) {
    > + netdev->features |= NETIF_F_HIGHDMA;
    > + printk(" highDMA");
    > + }
    > +
    > + netdev->vlan_features = netdev->features;
    > + printk("\n");
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
    > +{
    > + u32 tmp;
    > +
    > + tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL);
    > + *(u32 *)mac = tmp;
    > +
    > + tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH);
    > + mac[4] = tmp & 0xff;
    > + mac[5] = (tmp >> 8) & 0xff;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter)
    > +{
    > + u32 cfg;
    > +
    > + /* intr settings */
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_GET_CONF_INTR);
    > + cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
    > + adapter->intr.type = cfg & 0x3;
    > + adapter->intr.mask_mode = (cfg >> 2) & 0x3;
    > +
    > + if (adapter->intr.type == VMXNET3_IT_AUTO) {
    > + int err;
    > +
    > + adapter->intr.msix_entries[0].entry = 0;
    > + err = pci_enable_msix(adapter->pdev, adapter->intr.msix_entries,
    > + VMXNET3_LINUX_MAX_MSIX_VECT);
    > + if (!err) {
    > + adapter->intr.num_intrs = 1;
    > + adapter->intr.type = VMXNET3_IT_MSIX;
    > + return;
    > + }
    > +
    > + err = pci_enable_msi(adapter->pdev);
    > + if (!err) {
    > + adapter->intr.num_intrs = 1;
    > + adapter->intr.type = VMXNET3_IT_MSI;
    > + return;
    > + }
    > + }
    > +
    > + adapter->intr.type = VMXNET3_IT_INTX;
    > +
    > + /* INT-X related setting */
    > + adapter->intr.num_intrs = 1;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter)
    > +{
    > + if (adapter->intr.type == VMXNET3_IT_MSIX)
    > + pci_disable_msix(adapter->pdev);
    > + else if (adapter->intr.type == VMXNET3_IT_MSI)
    > + pci_disable_msi(adapter->pdev);
    > + else
    > + BUG_ON(adapter->intr.type != VMXNET3_IT_INTX);
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_tx_timeout(struct net_device *netdev)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > + adapter->tx_timeout_count++;
    > +
    > + printk(KERN_ERR "%s: tx hang\n", adapter->netdev->name);
    > + schedule_work(&adapter->work);
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_reset_work(struct work_struct *data)
    > +{
    > + struct vmxnet3_adapter *adapter;
    > +
    > + adapter = container_of(data, struct vmxnet3_adapter, work);
    > +
    > + /* if another thread is resetting the device, no need to proceed */
    > + if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
    > + return;
    > +
    > + /* if the device is closed, we must leave it alone */
    > + if (netif_running(adapter->netdev)) {
    > + printk(KERN_INFO "%s: resetting\n", adapter->netdev->name);
    > + vmxnet3_quiesce_dev(adapter);
    > + vmxnet3_reset_dev(adapter);
    > + vmxnet3_activate_dev(adapter);
    > + } else {
    > + printk(KERN_INFO "%s: already closed\n", adapter->netdev->name);
    > + }
    > +
    > + clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
    > +}
    > +
    > +
    > +static int __devinit
    > +vmxnet3_probe_device(struct pci_dev *pdev,
    > + const struct pci_device_id *id)
    > +{
    > + static const struct net_device_ops vmxnet3_netdev_ops = {
    > + .ndo_open = vmxnet3_open,
    > + .ndo_stop = vmxnet3_close,
    > + .ndo_start_xmit = vmxnet3_xmit_frame,
    > + .ndo_set_mac_address = vmxnet3_set_mac_addr,
    > + .ndo_change_mtu = vmxnet3_change_mtu,
    > + .ndo_get_stats = vmxnet3_get_stats,
    > + .ndo_tx_timeout = vmxnet3_tx_timeout,
    > + .ndo_set_multicast_list = vmxnet3_set_mc,
    > + .ndo_vlan_rx_register = vmxnet3_vlan_rx_register,
    > + .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid,
    > + .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid,
    > +#ifdef CONFIG_NET_POLL_CONTROLLER
    > + .ndo_poll_controller = vmxnet3_netpoll,
    > +#endif
    > + };
    > + int err;
    > + bool dma64 = false; /* stupid gcc */
    > + u32 ver;
    > + struct net_device *netdev;
    > + struct vmxnet3_adapter *adapter;
    > + u8 mac[ETH_ALEN];
    > +
    > + netdev = alloc_etherdev(sizeof(struct vmxnet3_adapter));
    > + if (!netdev) {
    > + printk(KERN_ERR "Failed to alloc ethernet device for adapter "
    > + "%s\n", pci_name(pdev));
    > + return -ENOMEM;
    > + }
    > +
    > + pci_set_drvdata(pdev, netdev);
    > + adapter = netdev_priv(netdev);
    > + adapter->netdev = netdev;
    > + adapter->pdev = pdev;
    > +
    > + adapter->shared = pci_alloc_consistent(adapter->pdev,
    > + sizeof(struct Vmxnet3_DriverShared),
    > + &adapter->shared_pa);
    > + if (!adapter->shared) {
    > + printk(KERN_ERR "Failed to allocate memory for %s\n",
    > + pci_name(pdev));
    > + err = -ENOMEM;
    > + goto err_alloc_shared;
    > + }
    > +
    > + adapter->tqd_start = pci_alloc_consistent(adapter->pdev,
    > + sizeof(struct Vmxnet3_TxQueueDesc) +
    > + sizeof(struct Vmxnet3_RxQueueDesc),
    > + &adapter->queue_desc_pa);
    > +
    > + if (!adapter->tqd_start) {
    > + printk(KERN_ERR "Failed to allocate memory for %s\n",
    > + pci_name(pdev));
    > + err = -ENOMEM;
    > + goto err_alloc_queue_desc;
    > + }
    > + adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start
    > + + 1);
    > +
    > + adapter->pm_conf = kmalloc(sizeof(struct Vmxnet3_PMConf), GFP_KERNEL);
    > + if (adapter->pm_conf == NULL) {
    > + printk(KERN_ERR "Failed to allocate memory for %s\n",
    > + pci_name(pdev));
    > + err = -ENOMEM;
    > + goto err_alloc_pm;
    > + }
    > +
    > + err = vmxnet3_alloc_pci_resources(adapter, &dma64);
    > + if (err < 0)
    > + goto err_alloc_pci;
    > +
    > + ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);
    > + if (ver & 1) {
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_VRRS, 1);
    > + } else {
    > + printk(KERN_ERR "Incompatible h/w version (0x%x) for adapter"
    > + " %s\n", ver, pci_name(pdev));
    > + err = -EBUSY;
    > + goto err_ver;
    > + }
    > +
    > + ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS);
    > + if (ver & 1) {
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1);
    > + } else {
    > + printk(KERN_ERR "Incompatible upt version (0x%x) for "
    > + "adapter %s\n", ver, pci_name(pdev));
    > + err = -EBUSY;
    > + goto err_ver;
    > + }
    > +
    > + vmxnet3_declare_features(adapter, dma64);
    > +
    > + adapter->dev_number = atomic_read(&devices_found);
    > + vmxnet3_alloc_intr_resources(adapter);
    > +
    > + vmxnet3_read_mac_addr(adapter, mac);
    > + memcpy(netdev->dev_addr, mac, netdev->addr_len);
    > +
    > + netdev->netdev_ops = &vmxnet3_netdev_ops;
    > + netdev->watchdog_timeo = 5 * HZ;
    > + vmxnet3_set_ethtool_ops(netdev);
    > +
    > + INIT_WORK(&adapter->work, vmxnet3_reset_work);
    > +
    > + netif_napi_add(netdev, &adapter->napi, vmxnet3_poll, 64);
    > + SET_NETDEV_DEV(netdev, &pdev->dev);
    > + err = register_netdev(netdev);
    > +
    > + if (err) {
    > + printk(KERN_ERR "Failed to register adapter %s\n",
    > + pci_name(pdev));
    > + goto err_register;
    > + }
    > +
    > + set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
    > + atomic_inc(&devices_found);
    > + return 0;
    > +
    > +err_register:
    > + vmxnet3_free_intr_resources(adapter);
    > +err_ver:
    > + vmxnet3_free_pci_resources(adapter);
    > +err_alloc_pci:
    > + kfree(adapter->pm_conf);
    > +err_alloc_pm:
    > + pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_TxQueueDesc) +
    > + sizeof(struct Vmxnet3_RxQueueDesc),
    > + adapter->tqd_start, adapter->queue_desc_pa);
    > +err_alloc_queue_desc:
    > + pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared),
    > + adapter->shared, adapter->shared_pa);
    > +err_alloc_shared:
    > + pci_set_drvdata(pdev, NULL);
    > + free_netdev(netdev);
    > + return err;
    > +}
    > +
    > +
    > +static void __devexit
    > +vmxnet3_remove_device(struct pci_dev *pdev)
    > +{
    > + struct net_device *netdev = pci_get_drvdata(pdev);
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > +
    > + flush_scheduled_work();
    > +
    > + unregister_netdev(netdev);
    > +
    > + vmxnet3_free_intr_resources(adapter);
    > + vmxnet3_free_pci_resources(adapter);
    > + kfree(adapter->pm_conf);
    > + pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_TxQueueDesc) +
    > + sizeof(struct Vmxnet3_RxQueueDesc),
    > + adapter->tqd_start, adapter->queue_desc_pa);
    > + pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared),
    > + adapter->shared, adapter->shared_pa);
    > + free_netdev(netdev);
    > +}
    > +
    > +
    > +#ifdef CONFIG_PM
    > +
    > +static int
    > +vmxnet3_suspend(struct device *device)
    > +{
    > + struct pci_dev *pdev = to_pci_dev(device);
    > + struct net_device *netdev = pci_get_drvdata(pdev);
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > + struct Vmxnet3_PMConf *pmConf;
    > + struct ethhdr *ehdr;
    > + struct arphdr *ahdr;
    > + u8 *arpreq;
    > + struct in_device *in_dev;
    > + struct in_ifaddr *ifa;
    > + int i = 0;
    > +
    > + if (!netif_running(netdev))
    > + return 0;
    > +
    > + vmxnet3_disable_all_intrs(adapter);
    > +
    > + netif_device_detach(netdev);
    > + netif_stop_queue(netdev);
    > +
    > + /* Create wake-up filters. */
    > + pmConf = adapter->pm_conf;
    > + memset(pmConf, 0, sizeof(*pmConf));
    > +
    > + if (adapter->wol & WAKE_UCAST) {
    > + pmConf->filters[i].patternSize = ETH_ALEN;
    > + pmConf->filters[i].maskSize = 1;
    > + memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN);
    > + pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */
    > +
    > + pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
    > + i++;
    > + }
    > +
    > + if (adapter->wol & WAKE_ARP) {
    > + in_dev = in_dev_get(netdev);
    > + if (!in_dev)
    > + goto skip_arp;
    > +
    > + ifa = (struct in_ifaddr *)in_dev->ifa_list;
    > + if (!ifa)
    > + goto skip_arp;
    > +
    > + pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/
    > + sizeof(struct arphdr) + /* ARP header */
    > + 2 * ETH_ALEN + /* 2 Ethernet addresses*/
    > + 2 * sizeof(u32); /*2 IPv4 addresses */
    > + pmConf->filters[i].maskSize =
    > + (pmConf->filters[i].patternSize - 1) / 8 + 1;
    > +
    > + /* ETH_P_ARP in Ethernet header. */
    > + ehdr = (struct ethhdr *)pmConf->filters[i].pattern;
    > + ehdr->h_proto = htons(ETH_P_ARP);
    > +
    > + /* ARPOP_REQUEST in ARP header. */
    > + ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN];
    > + ahdr->ar_op = htons(ARPOP_REQUEST);
    > + arpreq = (u8 *)(ahdr + 1);
    > +
    > + /* The Unicast IPv4 address in 'tip' field. */
    > + arpreq += 2 * ETH_ALEN + sizeof(u32);
    > + *(u32 *)arpreq = ifa->ifa_address;
    > +
    > + /* The mask for the relevant bits. */
    > + pmConf->filters[i].mask[0] = 0x00;
    > + pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */
    > + pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */
    > + pmConf->filters[i].mask[3] = 0x00;
    > + pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */
    > + pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */
    > + in_dev_put(in_dev);
    > +
    > + pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
    > + i++;
    > + }
    > +
    > +skip_arp:
    > + if (adapter->wol & WAKE_MAGIC)
    > + pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC;
    > +
    > + pmConf->numFilters = i;
    > +
    > + adapter->shared->devRead.pmConfDesc.confVer = 1;
    > + adapter->shared->devRead.pmConfDesc.confLen = sizeof(*pmConf);
    > + adapter->shared->devRead.pmConfDesc.confPA = virt_to_phys(pmConf);
    > +
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_UPDATE_PMCFG);
    > +
    > + pci_save_state(pdev);
    > + pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND),
    > + adapter->wol);
    > + pci_disable_device(pdev);
    > + pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND));
    > +
    > + return 0;
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_resume(struct device *device)
    > +{
    > + int err;
    > + struct pci_dev *pdev = to_pci_dev(device);
    > + struct net_device *netdev = pci_get_drvdata(pdev);
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > + struct Vmxnet3_PMConf *pmConf;
    > +
    > + if (!netif_running(netdev))
    > + return 0;
    > +
    > + /* Destroy wake-up filters. */
    > + pmConf = adapter->pm_conf;
    > + memset(pmConf, 0, sizeof(*pmConf));
    > +
    > + adapter->shared->devRead.pmConfDesc.confVer = 1;
    > + adapter->shared->devRead.pmConfDesc.confLen = sizeof(*pmConf);
    > + adapter->shared->devRead.pmConfDesc.confPA = virt_to_phys(pmConf);
    > +
    > + netif_device_attach(netdev);
    > + pci_set_power_state(pdev, PCI_D0);
    > + pci_restore_state(pdev);
    > + err = pci_enable_device_mem(pdev);
    > + if (err != 0)
    > + return err;
    > +
    > + pci_enable_wake(pdev, PCI_D0, 0);
    > +
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_UPDATE_PMCFG);
    > + vmxnet3_enable_all_intrs(adapter);
    > +
    > + return 0;
    > +}
    > +
    > +static struct dev_pm_ops vmxnet3_pm_ops = {
    > + .suspend = vmxnet3_suspend,
    > + .resume = vmxnet3_resume,
    > +};
    > +#endif
    > +
    > +static struct pci_driver vmxnet3_driver = {
    > + .name = vmxnet3_driver_name,
    > + .id_table = vmxnet3_pciid_table,
    > + .probe = vmxnet3_probe_device,
    > + .remove = __devexit_p(vmxnet3_remove_device),
    > +#ifdef CONFIG_PM
    > + .driver.pm = &vmxnet3_pm_ops,
    > +#endif
    > +};
    > +
    > +
    > +static int __init
    > +vmxnet3_init_module(void)
    > +{
    > + printk(KERN_INFO "%s - version %s\n", VMXNET3_DRIVER_DESC,
    > + VMXNET3_DRIVER_VERSION_REPORT);
    > + return pci_register_driver(&vmxnet3_driver);
    > +}
    > +
    > +module_init(vmxnet3_init_module);
    > +
    > +
    > +static void
    > +vmxnet3_exit_module(void)
    > +{
    > + pci_unregister_driver(&vmxnet3_driver);
    > +}
    > +
    > +module_exit(vmxnet3_exit_module);
    > +
    > +MODULE_AUTHOR("VMware, Inc.");
    > +MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC);
    > +MODULE_LICENSE("GPL v2");
    > +MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING);
    > diff --git a/drivers/net/vmxnet3/vmxnet3_ethtool.c b/drivers/net/vmxnet3/vmxnet3_ethtool.c
    > new file mode 100644
    > index 0000000..c2c15e4
    > --- /dev/null
    > +++ b/drivers/net/vmxnet3/vmxnet3_ethtool.c
    > @@ -0,0 +1,566 @@
    > +/*
    > + * Linux driver for VMware's vmxnet3 ethernet NIC.
    > + *
    > + * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved.
    > + *
    > + * This program is free software; you can redistribute it and/or modify it
    > + * under the terms of the GNU General Public License as published by the
    > + * Free Software Foundation; version 2 of the License and no later version.
    > + *
    > + * This program is distributed in the hope that it will be useful, but
    > + * WITHOUT ANY WARRANTY; without even the implied warranty of
    > + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
    > + * NON INFRINGEMENT. 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".
    > + *
    > + * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com>
    > + *
    > + */
    > +
    > +
    > +#include "vmxnet3_int.h"
    > +
    > +struct vmxnet3_stat_desc {
    > + char desc[ETH_GSTRING_LEN];
    > + int offset;
    > +};
    > +
    > +
    > +static u32
    > +vmxnet3_get_rx_csum(struct net_device *netdev)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > + return adapter->rxcsum;
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_set_rx_csum(struct net_device *netdev, u32 val)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > +
    > + if (adapter->rxcsum != val) {
    > + adapter->rxcsum = val;
    > + if (netif_running(netdev)) {
    > + if (val)
    > + adapter->shared->devRead.misc.uptFeatures |=
    > + UPT1_F_RXCSUM;
    > + else
    > + adapter->shared->devRead.misc.uptFeatures &=
    > + ~UPT1_F_RXCSUM;
    > +
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_UPDATE_FEATURE);
    > + }
    > + }
    > + return 0;
    > +}
    > +
    > +
    > +/* per tq stats maintained by the device */
    > +static const struct vmxnet3_stat_desc
    > +vmxnet3_tq_dev_stats[] = {
    > + /* description, offset */
    > + { "TSO pkts tx", offsetof(struct UPT1_TxStats, TSOPktsTxOK) },
    > + { "TSO bytes tx", offsetof(struct UPT1_TxStats, TSOBytesTxOK) },
    > + { "ucast pkts tx", offsetof(struct UPT1_TxStats, ucastPktsTxOK) },
    > + { "ucast bytes tx", offsetof(struct UPT1_TxStats, ucastBytesTxOK) },
    > + { "mcast pkts tx", offsetof(struct UPT1_TxStats, mcastPktsTxOK) },
    > + { "mcast bytes tx", offsetof(struct UPT1_TxStats, mcastBytesTxOK) },
    > + { "bcast pkts tx", offsetof(struct UPT1_TxStats, bcastPktsTxOK) },
    > + { "bcast bytes tx", offsetof(struct UPT1_TxStats, bcastBytesTxOK) },
    > + { "pkts tx err", offsetof(struct UPT1_TxStats, pktsTxError) },
    > + { "pkts tx discard", offsetof(struct UPT1_TxStats, pktsTxDiscard) },
    > +};
    > +
    > +/* per tq stats maintained by the driver */
    > +static const struct vmxnet3_stat_desc
    > +vmxnet3_tq_driver_stats[] = {
    > + /* description, offset */
    > + {"drv dropped tx total", offsetof(struct vmxnet3_tq_driver_stats,
    > + drop_total) },
    > + { " too many frags", offsetof(struct vmxnet3_tq_driver_stats,
    > + drop_too_many_frags) },
    > + { " giant hdr", offsetof(struct vmxnet3_tq_driver_stats,
    > + drop_oversized_hdr) },
    > + { " hdr err", offsetof(struct vmxnet3_tq_driver_stats,
    > + drop_hdr_inspect_err) },
    > + { " tso", offsetof(struct vmxnet3_tq_driver_stats,
    > + drop_tso) },
    > + { "ring full", offsetof(struct vmxnet3_tq_driver_stats,
    > + tx_ring_full) },
    > + { "pkts linearized", offsetof(struct vmxnet3_tq_driver_stats,
    > + linearized) },
    > + { "hdr cloned", offsetof(struct vmxnet3_tq_driver_stats,
    > + copy_skb_header) },
    > + { "giant hdr", offsetof(struct vmxnet3_tq_driver_stats,
    > + oversized_hdr) },
    > +};
    > +
    > +/* per rq stats maintained by the device */
    > +static const struct vmxnet3_stat_desc
    > +vmxnet3_rq_dev_stats[] = {
    > + { "LRO pkts rx", offsetof(struct UPT1_RxStats, LROPktsRxOK) },
    > + { "LRO byte rx", offsetof(struct UPT1_RxStats, LROBytesRxOK) },
    > + { "ucast pkts rx", offsetof(struct UPT1_RxStats, ucastPktsRxOK) },
    > + { "ucast bytes rx", offsetof(struct UPT1_RxStats, ucastBytesRxOK) },
    > + { "mcast pkts rx", offsetof(struct UPT1_RxStats, mcastPktsRxOK) },
    > + { "mcast bytes rx", offsetof(struct UPT1_RxStats, mcastBytesRxOK) },
    > + { "bcast pkts rx", offsetof(struct UPT1_RxStats, bcastPktsRxOK) },
    > + { "bcast bytes rx", offsetof(struct UPT1_RxStats, bcastBytesRxOK) },
    > + { "pkts rx out of buf", offsetof(struct UPT1_RxStats, pktsRxOutOfBuf) },
    > + { "pkts rx err", offsetof(struct UPT1_RxStats, pktsRxError) },
    > +};
    > +
    > +/* per rq stats maintained by the driver */
    > +static const struct vmxnet3_stat_desc
    > +vmxnet3_rq_driver_stats[] = {
    > + /* description, offset */
    > + { "drv dropped rx total", offsetof(struct vmxnet3_rq_driver_stats,
    > + drop_total) },
    > + { " err", offsetof(struct vmxnet3_rq_driver_stats,
    > + drop_err) },
    > + { " fcs", offsetof(struct vmxnet3_rq_driver_stats,
    > + drop_fcs) },
    > + { "rx buf alloc fail", offsetof(struct vmxnet3_rq_driver_stats,
    > + rx_buf_alloc_failure) },
    > +};
    > +
    > +/* gloabl stats maintained by the driver */
    > +static const struct vmxnet3_stat_desc
    > +vmxnet3_global_stats[] = {
    > + /* description, offset */
    > + { "tx timeout count", offsetof(struct vmxnet3_adapter,
    > + tx_timeout_count) }
    > +};
    > +
    > +
    > +struct net_device_stats *
    > +vmxnet3_get_stats(struct net_device *netdev)
    > +{
    > + struct vmxnet3_adapter *adapter;
    > + struct vmxnet3_tq_driver_stats *drvTxStats;
    > + struct vmxnet3_rq_driver_stats *drvRxStats;
    > + struct UPT1_TxStats *devTxStats;
    > + struct UPT1_RxStats *devRxStats;
    > + struct net_device_stats *net_stats = &netdev->stats;
    > +
    > + adapter = netdev_priv(netdev);
    > +
    > + /* Collect the dev stats into the shared area */
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_STATS);
    > +
    > + /* Assuming that we have a single queue device */
    > + devTxStats = &adapter->tqd_start->stats;
    > + devRxStats = &adapter->rqd_start->stats;
    > +
    > + /* Get access to the driver stats per queue */
    > + drvTxStats = &adapter->tx_queue.stats;
    > + drvRxStats = &adapter->rx_queue.stats;
    > +
    > + memset(net_stats, 0, sizeof(*net_stats));
    > +
    > + net_stats->rx_packets = devRxStats->ucastPktsRxOK +
    > + devRxStats->mcastPktsRxOK +
    > + devRxStats->bcastPktsRxOK;
    > +
    > + net_stats->tx_packets = devTxStats->ucastPktsTxOK +
    > + devTxStats->mcastPktsTxOK +
    > + devTxStats->bcastPktsTxOK;
    > +
    > + net_stats->rx_bytes = devRxStats->ucastBytesRxOK +
    > + devRxStats->mcastBytesRxOK +
    > + devRxStats->bcastBytesRxOK;
    > +
    > + net_stats->tx_bytes = devTxStats->ucastBytesTxOK +
    > + devTxStats->mcastBytesTxOK +
    > + devTxStats->bcastBytesTxOK;
    > +
    > + net_stats->rx_errors = devRxStats->pktsRxError;
    > + net_stats->tx_errors = devTxStats->pktsTxError;
    > + net_stats->rx_dropped = drvRxStats->drop_total;
    > + net_stats->tx_dropped = drvTxStats->drop_total;
    > + net_stats->multicast = devRxStats->mcastPktsRxOK;
    > +
    > + return net_stats;
    > +}
    > +
    > +static int
    > +vmxnet3_get_sset_count(struct net_device *netdev, int sset)
    > +{
    > + switch (sset) {
    > + case ETH_SS_STATS:
    > + return ARRAY_SIZE(vmxnet3_tq_dev_stats) +
    > + ARRAY_SIZE(vmxnet3_tq_driver_stats) +
    > + ARRAY_SIZE(vmxnet3_rq_dev_stats) +
    > + ARRAY_SIZE(vmxnet3_rq_driver_stats) +
    > + ARRAY_SIZE(vmxnet3_global_stats);
    > + default:
    > + return -EOPNOTSUPP;
    > + }
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_get_regs_len(struct net_device *netdev)
    > +{
    > + return 20 * sizeof(u32);
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > +
    > + strlcpy(drvinfo->driver, vmxnet3_driver_name, sizeof(drvinfo->driver));
    > + drvinfo->driver[sizeof(drvinfo->driver) - 1] = '\0';
    > +
    > + strlcpy(drvinfo->version, VMXNET3_DRIVER_VERSION_REPORT,
    > + sizeof(drvinfo->version));
    > + drvinfo->driver[sizeof(drvinfo->version) - 1] = '\0';
    > +
    > + strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
    > + drvinfo->fw_version[sizeof(drvinfo->fw_version) - 1] = '\0';
    > +
    > + strlcpy(drvinfo->bus_info, pci_name(adapter->pdev),
    > + ETHTOOL_BUSINFO_LEN);
    > + drvinfo->n_stats = vmxnet3_get_sset_count(netdev, ETH_SS_STATS);
    > + drvinfo->testinfo_len = 0;
    > + drvinfo->eedump_len = 0;
    > + drvinfo->regdump_len = vmxnet3_get_regs_len(netdev);
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_get_strings(struct net_device *netdev, u32 stringset, u8 *buf)
    > +{
    > + if (stringset == ETH_SS_STATS) {
    > + int i;
    > +
    > + for (i = 0; i < ARRAY_SIZE(vmxnet3_tq_dev_stats); i++) {
    > + memcpy(buf, vmxnet3_tq_dev_stats[i].desc,
    > + ETH_GSTRING_LEN);
    > + buf += ETH_GSTRING_LEN;
    > + }
    > + for (i = 0; i < ARRAY_SIZE(vmxnet3_tq_driver_stats); i++) {
    > + memcpy(buf, vmxnet3_tq_driver_stats[i].desc,
    > + ETH_GSTRING_LEN);
    > + buf += ETH_GSTRING_LEN;
    > + }
    > + for (i = 0; i < ARRAY_SIZE(vmxnet3_rq_dev_stats); i++) {
    > + memcpy(buf, vmxnet3_rq_dev_stats[i].desc,
    > + ETH_GSTRING_LEN);
    > + buf += ETH_GSTRING_LEN;
    > + }
    > + for (i = 0; i < ARRAY_SIZE(vmxnet3_rq_driver_stats); i++) {
    > + memcpy(buf, vmxnet3_rq_driver_stats[i].desc,
    > + ETH_GSTRING_LEN);
    > + buf += ETH_GSTRING_LEN;
    > + }
    > + for (i = 0; i < ARRAY_SIZE(vmxnet3_global_stats); i++) {
    > + memcpy(buf, vmxnet3_global_stats[i].desc,
    > + ETH_GSTRING_LEN);
    > + buf += ETH_GSTRING_LEN;
    > + }
    > + }
    > +}
    > +
    > +static u32
    > +vmxnet3_get_flags(struct net_device *netdev) {
    > + return netdev->features;
    > +}
    > +
    > +static int
    > +vmxnet3_set_flags(struct net_device *netdev, u32 data) {
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > + u8 lro_requested = (data & ETH_FLAG_LRO) == 0 ? 0 : 1;
    > + u8 lro_present = (netdev->features & NETIF_F_LRO) == 0 ? 0 : 1;
    > +
    > + if (lro_requested ^ lro_present) {
    > + /* toggle the LRO feature*/
    > + netdev->features ^= NETIF_F_LRO;
    > +
    > + /* update harware LRO capability accordingly */
    > + if (lro_requested)
    > + adapter->shared->devRead.misc.uptFeatures &= UPT1_F_LRO;
    > + else
    > + adapter->shared->devRead.misc.uptFeatures &=
    > + ~UPT1_F_LRO;
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
    > + VMXNET3_CMD_UPDATE_FEATURE);
    > + }
    > + return 0;
    > +}
    > +
    > +static void
    > +vmxnet3_get_ethtool_stats(struct net_device *netdev,
    > + struct ethtool_stats *stats, u64 *buf)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > + u8 *base;
    > + int i;
    > +
    > + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_STATS);
    > +
    > + /* this does assume each counter is 64-bit wide */
    > +
    > + base = (u8 *)&adapter->tqd_start->stats;
    > + for (i = 0; i < ARRAY_SIZE(vmxnet3_tq_dev_stats); i++)
    > + *buf++ = *(u64 *)(base + vmxnet3_tq_dev_stats[i].offset);
    > +
    > + base = (u8 *)&adapter->tx_queue.stats;
    > + for (i = 0; i < ARRAY_SIZE(vmxnet3_tq_driver_stats); i++)
    > + *buf++ = *(u64 *)(base + vmxnet3_tq_driver_stats[i].offset);
    > +
    > + base = (u8 *)&adapter->rqd_start->stats;
    > + for (i = 0; i < ARRAY_SIZE(vmxnet3_rq_dev_stats); i++)
    > + *buf++ = *(u64 *)(base + vmxnet3_rq_dev_stats[i].offset);
    > +
    > + base = (u8 *)&adapter->rx_queue.stats;
    > + for (i = 0; i < ARRAY_SIZE(vmxnet3_rq_driver_stats); i++)
    > + *buf++ = *(u64 *)(base + vmxnet3_rq_driver_stats[i].offset);
    > +
    > + base = (u8 *)adapter;
    > + for (i = 0; i < ARRAY_SIZE(vmxnet3_global_stats); i++)
    > + *buf++ = *(u64 *)(base + vmxnet3_global_stats[i].offset);
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > + u32 *buf = p;
    > +
    > + memset(p, 0, vmxnet3_get_regs_len(netdev));
    > +
    > + regs->version = 1;
    > +
    > + /* Update vmxnet3_get_regs_len if we want to dump more registers */
    > +
    > + /* make each ring use multiple of 16 bytes */
    > + buf[0] = adapter->tx_queue.tx_ring.next2fill;
    > + buf[1] = adapter->tx_queue.tx_ring.next2comp;
    > + buf[2] = adapter->tx_queue.tx_ring.gen;
    > + buf[3] = 0;
    > +
    > + buf[4] = adapter->tx_queue.comp_ring.next2proc;
    > + buf[5] = adapter->tx_queue.comp_ring.gen;
    > + buf[6] = adapter->tx_queue.stopped;
    > + buf[7] = 0;
    > +
    > + buf[8] = adapter->rx_queue.rx_ring[0].next2fill;
    > + buf[9] = adapter->rx_queue.rx_ring[0].next2comp;
    > + buf[10] = adapter->rx_queue.rx_ring[0].gen;
    > + buf[11] = 0;
    > +
    > + buf[12] = adapter->rx_queue.rx_ring[1].next2fill;
    > + buf[13] = adapter->rx_queue.rx_ring[1].next2comp;
    > + buf[14] = adapter->rx_queue.rx_ring[1].gen;
    > + buf[15] = 0;
    > +
    > + buf[16] = adapter->rx_queue.comp_ring.next2proc;
    > + buf[17] = adapter->rx_queue.comp_ring.gen;
    > + buf[18] = 0;
    > + buf[19] = 0;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_get_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > +
    > + wol->supported = WAKE_UCAST | WAKE_ARP | WAKE_MAGIC;
    > + wol->wolopts = adapter->wol;
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > +
    > + if (wol->wolopts & (WAKE_PHY | WAKE_MCAST | WAKE_BCAST |
    > + WAKE_MAGICSECURE)) {
    > + return -EOPNOTSUPP;
    > + }
    > +
    > + adapter->wol = wol->wolopts;
    > +
    > + device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
    > +
    > + return 0;
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > +
    > + ecmd->supported = SUPPORTED_10000baseT_Full | SUPPORTED_1000baseT_Full |
    > + SUPPORTED_TP;
    > + ecmd->advertising = ADVERTISED_TP;
    > + ecmd->port = PORT_TP;
    > + ecmd->transceiver = XCVR_INTERNAL;
    > +
    > + if (adapter->link_speed) {
    > + ecmd->speed = adapter->link_speed;
    > + ecmd->duplex = DUPLEX_FULL;
    > + } else {
    > + ecmd->speed = -1;
    > + ecmd->duplex = -1;
    > + }
    > + return 0;
    > +}
    > +
    > +
    > +static void
    > +vmxnet3_get_ringparam(struct net_device *netdev,
    > + struct ethtool_ringparam *param)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > +
    > + param->rx_max_pending = VMXNET3_RX_RING_MAX_SIZE;
    > + param->tx_max_pending = VMXNET3_TX_RING_MAX_SIZE;
    > + param->rx_mini_max_pending = 0;
    > + param->rx_jumbo_max_pending = 0;
    > +
    > + param->rx_pending = adapter->rx_queue.rx_ring[0].size;
    > + param->tx_pending = adapter->tx_queue.tx_ring.size;
    > + param->rx_mini_pending = 0;
    > + param->rx_jumbo_pending = 0;
    > +}
    > +
    > +
    > +static int
    > +vmxnet3_set_ringparam(struct net_device *netdev,
    > + struct ethtool_ringparam *param)
    > +{
    > + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
    > + u32 new_tx_ring_size, new_rx_ring_size;
    > + u32 sz;
    > + int err = 0;
    > +
    > + if (param->tx_pending == 0 || param->tx_pending >
    > + VMXNET3_TX_RING_MAX_SIZE)
    > + return -EINVAL;
    > +
    > + if (param->rx_pending == 0 || param->rx_pending >
    > + VMXNET3_RX_RING_MAX_SIZE)
    > + return -EINVAL;
    > +
    > +
    > + /* round it up to a multiple of VMXNET3_RING_SIZE_ALIGN */
    > + new_tx_ring_size = (param->tx_pending + VMXNET3_RING_SIZE_MASK) &
    > + ~VMXNET3_RING_SIZE_MASK;
    > + new_tx_ring_size = min_t(u32, new_tx_ring_size,
    > + VMXNET3_TX_RING_MAX_SIZE);
    > + if (new_tx_ring_size > VMXNET3_TX_RING_MAX_SIZE || (new_tx_ring_size %
    > + VMXNET3_RING_SIZE_ALIGN) != 0)
    > + return -EINVAL;
    > +
    > + /* ring0 has to be a multiple of
    > + * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
    > + */
    > + sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
    > + new_rx_ring_size = (param->rx_pending + sz - 1) / sz * sz;
    > + new_rx_ring_size = min_t(u32, new_rx_ring_size,
    > + VMXNET3_RX_RING_MAX_SIZE / sz * sz);
    > + if (new_rx_ring_size > VMXNET3_RX_RING_MAX_SIZE || (new_rx_ring_size %
    > + sz) != 0)
    > + return -EINVAL;
    > +
    > + if (new_tx_ring_size == adapter->tx_queue.tx_ring.size &&
    > + new_rx_ring_size == adapter->rx_queue.rx_ring[0].size) {
    > + return 0;
    > + }
    > +
    > + /*
    > + * Reset_work may be in the middle of resetting the device, wait for its
    > + * completion.
    > + */
    > + while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
    > + msleep(1);
    > +
    > + if (netif_running(netdev)) {
    > + vmxnet3_quiesce_dev(adapter);
    > + vmxnet3_reset_dev(adapter);
    > +
    > + /* recreate the rx queue and the tx queue based on the
    > + * new sizes */
    > + vmxnet3_tq_destroy(&adapter->tx_queue, adapter);
    > + vmxnet3_rq_destroy(&adapter->rx_queue, adapter);
    > +
    > + err = vmxnet3_create_queues(adapter, new_tx_ring_size,
    > + new_rx_ring_size, VMXNET3_DEF_RX_RING_SIZE);
    > + if (err) {
    > + /* failed, most likely because of OOM, try default
    > + * size */
    > + printk(KERN_ERR "%s: failed to apply new sizes, try the"
    > + " default ones\n", netdev->name);
    > + err = vmxnet3_create_queues(adapter,
    > + VMXNET3_DEF_TX_RING_SIZE,
    > + VMXNET3_DEF_RX_RING_SIZE,
    > + VMXNET3_DEF_RX_RING_SIZE);
    > + if (err) {
    > + printk(KERN_ERR "%s: failed to create queues "
    > + "with default sizes. Closing it\n",
    > + netdev->name);
    > + goto out;
    > + }
    > + }
    > +
    > + err = vmxnet3_activate_dev(adapter);
    > + if (err)
    > + printk(KERN_ERR "%s: failed to re-activate, error %d."
    > + " Closing it\n", netdev->name, err);
    > + }
    > +
    > +out:
    > + clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
    > + if (err)
    > + vmxnet3_force_close(adapter);
    > +
    > + return err;
    > +}
    > +
    > +
    > +static struct ethtool_ops vmxnet3_ethtool_ops = {
    > + .get_settings = vmxnet3_get_settings,
    > + .get_drvinfo = vmxnet3_get_drvinfo,
    > + .get_regs_len = vmxnet3_get_regs_len,
    > + .get_regs = vmxnet3_get_regs,
    > + .get_wol = vmxnet3_get_wol,
    > + .set_wol = vmxnet3_set_wol,
    > + .get_link = ethtool_op_get_link,
    > + .get_rx_csum = vmxnet3_get_rx_csum,
    > + .set_rx_csum = vmxnet3_set_rx_csum,
    > + .get_tx_csum = ethtool_op_get_tx_csum,
    > + .set_tx_csum = ethtool_op_set_tx_hw_csum,
    > + .get_sg = ethtool_op_get_sg,
    > + .set_sg = ethtool_op_set_sg,
    > + .get_tso = ethtool_op_get_tso,
    > + .set_tso = ethtool_op_set_tso,
    > + .get_strings = vmxnet3_get_strings,
    > + .get_flags = vmxnet3_get_flags,
    > + .set_flags = vmxnet3_set_flags,
    > + .get_sset_count = vmxnet3_get_sset_count,
    > + .get_ethtool_stats = vmxnet3_get_ethtool_stats,
    > + .get_ringparam = vmxnet3_get_ringparam,
    > + .set_ringparam = vmxnet3_set_ringparam,
    > +};
    > +
    > +void vmxnet3_set_ethtool_ops(struct net_device *netdev)
    > +{
    > + SET_ETHTOOL_OPS(netdev, &vmxnet3_ethtool_ops);
    > +}
    > diff --git a/drivers/net/vmxnet3/vmxnet3_int.h b/drivers/net/vmxnet3/vmxnet3_int.h
    > new file mode 100644
    > index 0000000..cf4b08d
    > --- /dev/null
    > +++ b/drivers/net/vmxnet3/vmxnet3_int.h
    > @@ -0,0 +1,389 @@
    > +/*
    > + * Linux driver for VMware's vmxnet3 ethernet NIC.
    > + *
    > + * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved.
    > + *
    > + * This program is free software; you can redistribute it and/or modify it
    > + * under the terms of the GNU General Public License as published by the
    > + * Free Software Foundation; version 2 of the License and no later version.
    > + *
    > + * This program is distributed in the hope that it will be useful, but
    > + * WITHOUT ANY WARRANTY; without even the implied warranty of
    > + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
    > + * NON INFRINGEMENT. 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".
    > + *
    > + * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com>
    > + *
    > + */
    > +
    > +#ifndef _VMXNET3_INT_H
    > +#define _VMXNET3_INT_H
    > +
    > +#include <linux/types.h>
    > +#include <linux/ethtool.h>
    > +#include <linux/delay.h>
    > +#include <linux/netdevice.h>
    > +#include <linux/pci.h>
    > +#include <linux/ethtool.h>
    > +#include <linux/compiler.h>
    > +#include <linux/module.h>
    > +#include <linux/moduleparam.h>
    > +#include <linux/slab.h>
    > +#include <linux/spinlock.h>
    > +#include <linux/ioport.h>
    > +#include <linux/highmem.h>
    > +#include <linux/init.h>
    > +#include <linux/timer.h>
    > +#include <linux/skbuff.h>
    > +#include <linux/interrupt.h>
    > +#include <linux/workqueue.h>
    > +#include <linux/uaccess.h>
    > +#include <asm/dma.h>
    > +#include <asm/page.h>
    > +
    > +#include <linux/tcp.h>
    > +#include <linux/udp.h>
    > +#include <linux/ip.h>
    > +#include <linux/ipv6.h>
    > +#include <linux/in.h>
    > +#include <linux/etherdevice.h>
    > +#include <asm/checksum.h>
    > +#include <linux/if_vlan.h>
    > +#include <linux/if_arp.h>
    > +#include <linux/inetdevice.h>
    > +#include <linux/dst.h>
    > +
    > +#include "vmxnet3_defs.h"
    > +
    > +#ifdef DEBUG
    > +# define VMXNET3_DRIVER_VERSION_REPORT VMXNET3_DRIVER_VERSION_STRING"-NAPI(debug)"
    > +#else
    > +# define VMXNET3_DRIVER_VERSION_REPORT VMXNET3_DRIVER_VERSION_STRING"-NAPI"
    > +#endif
    > +
    > +
    > +/*
    > + * Version numbers
    > + */
    > +#define VMXNET3_DRIVER_VERSION_STRING "1.0.4.0-k"
    > +
    > +/* a 32-bit int, each byte encode a verion number in VMXNET3_DRIVER_VERSION */
    > +#define VMXNET3_DRIVER_VERSION_NUM 0x01000400
    > +
    > +
    > +/*
    > + * Capabilities
    > + */
    > +
    > +enum {
    > + VMNET_CAP_SG = 0x0001, /* Can do scatter-gather transmits. */
    > + VMNET_CAP_IP4_CSUM = 0x0002, /* Can checksum only TCP/UDP over
    > + * IPv4 */
    > + VMNET_CAP_HW_CSUM = 0x0004, /* Can checksum all packets. */
    > + VMNET_CAP_HIGH_DMA = 0x0008, /* Can DMA to high memory. */
    > + VMNET_CAP_TOE = 0x0010, /* Supports TCP/IP offload. */
    > + VMNET_CAP_TSO = 0x0020, /* Supports TCP Segmentation
    > + * offload */
    > + VMNET_CAP_SW_TSO = 0x0040, /* Supports SW TCP Segmentation */
    > + VMNET_CAP_VMXNET_APROM = 0x0080, /* Vmxnet APROM support */
    > + VMNET_CAP_HW_TX_VLAN = 0x0100, /* Can we do VLAN tagging in HW */
    > + VMNET_CAP_HW_RX_VLAN = 0x0200, /* Can we do VLAN untagging in HW */
    > + VMNET_CAP_SW_VLAN = 0x0400, /* VLAN tagging/untagging in SW */
    > + VMNET_CAP_WAKE_PCKT_RCV = 0x0800, /* Can wake on network packet recv? */
    > + VMNET_CAP_ENABLE_INT_INLINE = 0x1000, /* Enable Interrupt Inline */
    > + VMNET_CAP_ENABLE_HEADER_COPY = 0x2000, /* copy header for vmkernel */
    > + VMNET_CAP_TX_CHAIN = 0x4000, /* Guest can use multiple tx entries
    > + * for a pkt */
    > + VMNET_CAP_RX_CHAIN = 0x8000, /* pkt can span multiple rx entries */
    > + VMNET_CAP_LPD = 0x10000, /* large pkt delivery */
    > + VMNET_CAP_BPF = 0x20000, /* BPF Support in VMXNET Virtual HW*/
    > + VMNET_CAP_SG_SPAN_PAGES = 0x40000, /* Scatter-gather can span multiple*/
    > + /* pages transmits */
    > + VMNET_CAP_IP6_CSUM = 0x80000, /* Can do IPv6 csum offload. */
    > + VMNET_CAP_TSO6 = 0x100000, /* TSO seg. offload for IPv6 pkts. */
    > + VMNET_CAP_TSO256k = 0x200000, /* Can do TSO seg offload for */
    > + /* pkts up to 256kB. */
    > + VMNET_CAP_UPT = 0x400000 /* Support UPT */
    > +};
    > +
    > +/*
    > + * PCI vendor and device IDs.
    > + */
    > +#define PCI_VENDOR_ID_VMWARE 0x15AD
    > +#define PCI_DEVICE_ID_VMWARE_VMXNET3 0x07B0
    > +#define MAX_ETHERNET_CARDS 10
    > +#define MAX_PCI_PASSTHRU_DEVICE 6
    > +
    > +struct vmxnet3_cmd_ring {
    > + union Vmxnet3_GenericDesc *base;
    > + u32 size;
    > + u32 next2fill;
    > + u32 next2comp;
    > + u8 gen;
    > + dma_addr_t basePA;
    > +};
    > +
    > +static inline void
    > +vmxnet3_cmd_ring_adv_next2fill(struct vmxnet3_cmd_ring *ring)
    > +{
    > + ring->next2fill++;
    > + if (unlikely(ring->next2fill == ring->size)) {
    > + ring->next2fill = 0;
    > + VMXNET3_FLIP_RING_GEN(ring->gen);
    > + }
    > +}
    > +
    > +static inline void
    > +vmxnet3_cmd_ring_adv_next2comp(struct vmxnet3_cmd_ring *ring)
    > +{
    > + VMXNET3_INC_RING_IDX_ONLY(ring->next2comp, ring->size);
    > +}
    > +
    > +static inline int
    > +vmxnet3_cmd_ring_desc_avail(struct vmxnet3_cmd_ring *ring)
    > +{
    > + return (ring->next2comp > ring->next2fill ? 0 : ring->size) +
    > + ring->next2comp - ring->next2fill - 1;
    > +}
    > +
    > +struct vmxnet3_comp_ring {
    > + union Vmxnet3_GenericDesc *base;
    > + u32 size;
    > + u32 next2proc;
    > + u8 gen;
    > + u8 intr_idx;
    > + dma_addr_t basePA;
    > +};
    > +
    > +static inline void
    > +vmxnet3_comp_ring_adv_next2proc(struct vmxnet3_comp_ring *ring)
    > +{
    > + ring->next2proc++;
    > + if (unlikely(ring->next2proc == ring->size)) {
    > + ring->next2proc = 0;
    > + VMXNET3_FLIP_RING_GEN(ring->gen);
    > + }
    > +}
    > +
    > +struct vmxnet3_tx_data_ring {
    > + struct Vmxnet3_TxDataDesc *base;
    > + u32 size;
    > + dma_addr_t basePA;
    > +};
    > +
    > +enum vmxnet3_buf_map_type {
    > + VMXNET3_MAP_INVALID = 0,
    > + VMXNET3_MAP_NONE,
    > + VMXNET3_MAP_SINGLE,
    > + VMXNET3_MAP_PAGE,
    > +};
    > +
    > +struct vmxnet3_tx_buf_info {
    > + u32 map_type;
    > + u16 len;
    > + u16 sop_idx;
    > + dma_addr_t dma_addr;
    > + struct sk_buff *skb;
    > +};
    > +
    > +struct vmxnet3_tq_driver_stats {
    > + u64 drop_total; /* # of pkts dropped by the driver, the
    > + * counters below track droppings due to
    > + * different reasons
    > + */
    > + u64 drop_too_many_frags;
    > + u64 drop_oversized_hdr;
    > + u64 drop_hdr_inspect_err;
    > + u64 drop_tso;
    > +
    > + u64 tx_ring_full;
    > + u64 linearized; /* # of pkts linearized */
    > + u64 copy_skb_header; /* # of times we have to copy skb header */
    > + u64 oversized_hdr;
    > +};
    > +
    > +struct vmxnet3_tx_ctx {
    > + bool ipv4;
    > + u16 mss;
    > + u32 eth_ip_hdr_size; /* only valid for pkts requesting tso or csum
    > + * offloading
    > + */
    > + u32 l4_hdr_size; /* only valid if mss != 0 */
    > + u32 copy_size; /* # of bytes copied into the data ring */
    > + union Vmxnet3_GenericDesc *sop_txd;
    > + union Vmxnet3_GenericDesc *eop_txd;
    > +};
    > +
    > +struct vmxnet3_tx_queue {
    > + spinlock_t tx_lock;
    > + struct vmxnet3_cmd_ring tx_ring;
    > + struct vmxnet3_tx_buf_info *buf_info;
    > + struct vmxnet3_tx_data_ring data_ring;
    > + struct vmxnet3_comp_ring comp_ring;
    > + struct Vmxnet3_TxQueueCtrl *shared;
    > + struct vmxnet3_tq_driver_stats stats;
    > + bool stopped;
    > + int num_stop; /* # of times the queue is
    > + * stopped */
    > +} __attribute__((__aligned__(SMP_CACHE_BYTES)));
    > +
    > +enum vmxnet3_rx_buf_type {
    > + VMXNET3_RX_BUF_NONE = 0,
    > + VMXNET3_RX_BUF_SKB = 1,
    > + VMXNET3_RX_BUF_PAGE = 2
    > +};
    > +
    > +struct vmxnet3_rx_buf_info {
    > + enum vmxnet3_rx_buf_type buf_type;
    > + u16 len;
    > + union {
    > + struct sk_buff *skb;
    > + struct page *page;
    > + };
    > + dma_addr_t dma_addr;
    > +};
    > +
    > +struct vmxnet3_rx_ctx {
    > + struct sk_buff *skb;
    > + u32 sop_idx;
    > +};
    > +
    > +struct vmxnet3_rq_driver_stats {
    > + u64 drop_total;
    > + u64 drop_err;
    > + u64 drop_fcs;
    > + u64 rx_buf_alloc_failure;
    > +};
    > +
    > +struct vmxnet3_rx_queue {
    > + struct vmxnet3_cmd_ring rx_ring[2];
    > + struct vmxnet3_comp_ring comp_ring;
    > + struct vmxnet3_rx_ctx rx_ctx;
    > + u32 qid; /* rqID in RCD for buffer from 1st ring */
    > + u32 qid2; /* rqID in RCD for buffer from 2nd ring */
    > + u32 uncommitted[2]; /* # of buffers allocated since last RXPROD
    > + * update */
    > + struct vmxnet3_rx_buf_info *buf_info[2];
    > + struct Vmxnet3_RxQueueCtrl *shared;
    > + struct vmxnet3_rq_driver_stats stats;
    > +} __attribute__((__aligned__(SMP_CACHE_BYTES)));
    > +
    > +#define VMXNET3_LINUX_MAX_MSIX_VECT 1
    > +
    > +struct vmxnet3_intr {
    > + enum vmxnet3_intr_mask_mode mask_mode;
    > + enum vmxnet3_intr_type type; /* MSI-X, MSI, or INTx? */
    > + u8 num_intrs; /* # of intr vectors */
    > + u8 event_intr_idx; /* idx of the intr vector for event */
    > + u8 mod_levels[VMXNET3_LINUX_MAX_MSIX_VECT]; /* moderation level */
    > +#ifdef CONFIG_PCI_MSI
    > + struct msix_entry msix_entries[VMXNET3_LINUX_MAX_MSIX_VECT];
    > +#endif
    > +};
    > +
    > +#define VMXNET3_STATE_BIT_RESETTING 0
    > +#define VMXNET3_STATE_BIT_QUIESCED 1
    > +struct vmxnet3_adapter {
    > + struct vmxnet3_tx_queue tx_queue;
    > + struct vmxnet3_rx_queue rx_queue;
    > + struct napi_struct napi;
    > + struct vlan_group *vlan_grp;
    > +
    > + struct vmxnet3_intr intr;
    > +
    > + struct Vmxnet3_DriverShared *shared;
    > + struct Vmxnet3_PMConf *pm_conf;
    > + struct Vmxnet3_TxQueueDesc *tqd_start; /* first tx queue desc */
    > + struct Vmxnet3_RxQueueDesc *rqd_start; /* first rx queue desc */
    > + struct net_device *netdev;
    > + struct pci_dev *pdev;
    > +
    > + u8 *hw_addr0; /* for BAR 0 */
    > + u8 *hw_addr1; /* for BAR 1 */
    > +
    > + /* feature control */
    > + bool rxcsum;
    > + bool lro;
    > + bool jumbo_frame;
    > +
    > + /* rx buffer related */
    > + unsigned skb_buf_size;
    > + int rx_buf_per_pkt; /* only apply to the 1st ring */
    > + dma_addr_t shared_pa;
    > + dma_addr_t queue_desc_pa;
    > +
    > + /* Wake-on-LAN */
    > + u32 wol;
    > +
    > + /* Link speed */
    > + u32 link_speed; /* in mbps */
    > +
    > + u64 tx_timeout_count;
    > + struct work_struct work;
    > +
    > + unsigned long state; /* VMXNET3_STATE_BIT_xxx */
    > +
    > + int dev_number;
    > +};
    > +
    > +#define VMXNET3_WRITE_BAR0_REG(adapter, reg, val) \
    > + writel((val), (adapter)->hw_addr0 + (reg))
    > +#define VMXNET3_READ_BAR0_REG(adapter, reg) \
    > + readl((adapter)->hw_addr0 + (reg))
    > +
    > +#define VMXNET3_WRITE_BAR1_REG(adapter, reg, val) \
    > + writel((val), (adapter)->hw_addr1 + (reg))
    > +#define VMXNET3_READ_BAR1_REG(adapter, reg) \
    > + readl((adapter)->hw_addr1 + (reg))
    > +
    > +#define VMXNET3_WAKE_QUEUE_THRESHOLD(tq) (5)
    > +#define VMXNET3_RX_ALLOC_THRESHOLD(rq, ring_idx, adapter) \
    > + ((rq)->rx_ring[ring_idx].size >> 3)
    > +
    > +#define VMXNET3_GET_ADDR_LO(dma) ((u32)(dma))
    > +#define VMXNET3_GET_ADDR_HI(dma) ((u32)(((u64)(dma)) >> 32))
    > +
    > +/* must be a multiple of VMXNET3_RING_SIZE_ALIGN */
    > +#define VMXNET3_DEF_TX_RING_SIZE 512
    > +#define VMXNET3_DEF_RX_RING_SIZE 256
    > +
    > +#define VMXNET3_MAX_ETH_HDR_SIZE 22
    > +#define VMXNET3_MAX_SKB_BUF_SIZE (3*1024)
    > +
    > +int
    > +vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter);
    > +
    > +int
    > +vmxnet3_activate_dev(struct vmxnet3_adapter *adapter);
    > +
    > +void
    > +vmxnet3_force_close(struct vmxnet3_adapter *adapter);
    > +
    > +void
    > +vmxnet3_reset_dev(struct vmxnet3_adapter *adapter);
    > +
    > +void
    > +vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq,
    > + struct vmxnet3_adapter *adapter);
    > +
    > +void
    > +vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
    > + struct vmxnet3_adapter *adapter);
    > +
    > +int
    > +vmxnet3_create_queues(struct vmxnet3_adapter *adapter,
    > + u32 tx_ring_size, u32 rx_ring_size, u32 rx_ring2_size);
    > +
    > +extern void vmxnet3_set_ethtool_ops(struct net_device *netdev);
    > +extern struct net_device_stats *vmxnet3_get_stats(struct net_device *netdev);
    > +
    > +extern char vmxnet3_driver_name[];
    > +#endif
    >


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