drivers/net/vmxnet3/vmxnet3_int.h - kernel/msm-4.9 - Gitiles

 /*
  * 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/bitops.h>
 #include <linux/ethtool.h>
 #include <linux/delay.h>
 #include <linux/netdevice.h>
 #include <linux/pci.h>
 #include <linux/compiler.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/ioport.h>
 #include <linux/highmem.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/log2.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   "1.4.3.0-k"

 /* a 32-bit int, each byte encode a verion number in VMXNET3_DRIVER_VERSION */
 #define VMXNET3_DRIVER_VERSION_NUM      0x01040300

 #if defined(CONFIG_PCI_MSI)
 	/* RSS only makes sense if MSI-X is supported. */
 	#define VMXNET3_RSS
 #endif

 /*
  * 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_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;
 	bool   ipv6;
 	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 {
 	char			name[IFNAMSIZ+8]; /* To identify interrupt */
 	struct vmxnet3_adapter		*adapter;
 	spinlock_t                      tx_lock;
 	struct vmxnet3_cmd_ring         tx_ring;
 	struct vmxnet3_tx_buf_info      *buf_info;
 	dma_addr_t                       buf_info_pa;
 	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 */
 	int				qid;
 } __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 {
 	char			name[IFNAMSIZ + 8]; /* To identify interrupt */
 	struct vmxnet3_adapter	  *adapter;
 	struct napi_struct        napi;
 	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 */
 	struct vmxnet3_rx_buf_info     *buf_info[2];
 	dma_addr_t                      buf_info_pa;
 	struct Vmxnet3_RxQueueCtrl            *shared;
 	struct vmxnet3_rq_driver_stats  stats;
 } __attribute__((__aligned__(SMP_CACHE_BYTES)));

 #define VMXNET3_DEVICE_MAX_TX_QUEUES 8
 #define VMXNET3_DEVICE_MAX_RX_QUEUES 8   /* Keep this value as a power of 2 */

 /* Should be less than UPT1_RSS_MAX_IND_TABLE_SIZE */
 #define VMXNET3_RSS_IND_TABLE_SIZE (VMXNET3_DEVICE_MAX_RX_QUEUES * 4)

 #define VMXNET3_LINUX_MAX_MSIX_VECT     (VMXNET3_DEVICE_MAX_TX_QUEUES + \
 					 VMXNET3_DEVICE_MAX_RX_QUEUES + 1)
 #define VMXNET3_LINUX_MIN_MSIX_VECT     2 /* 1 for tx-rx pair and 1 for event */


 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 */
 	char	event_msi_vector_name[IFNAMSIZ+11];
 #ifdef CONFIG_PCI_MSI
 	struct msix_entry msix_entries[VMXNET3_LINUX_MAX_MSIX_VECT];
 #endif
 };

 /* Interrupt sharing schemes, share_intr */
 #define VMXNET3_INTR_BUDDYSHARE 0    /* Corresponding tx,rx queues share irq */
 #define VMXNET3_INTR_TXSHARE 1	     /* All tx queues share one irq */
 #define VMXNET3_INTR_DONTSHARE 2     /* each queue has its own irq */


 #define VMXNET3_STATE_BIT_RESETTING   0
 #define VMXNET3_STATE_BIT_QUIESCED    1
 struct vmxnet3_adapter {
 	struct vmxnet3_tx_queue		tx_queue[VMXNET3_DEVICE_MAX_TX_QUEUES];
 	struct vmxnet3_rx_queue		rx_queue[VMXNET3_DEVICE_MAX_RX_QUEUES];
 	unsigned long			active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
 	struct vmxnet3_intr		intr;
 	spinlock_t			cmd_lock;
 	struct Vmxnet3_DriverShared	*shared;
 	struct Vmxnet3_PMConf		*pm_conf;
 	struct Vmxnet3_TxQueueDesc	*tqd_start;     /* all tx queue desc */
 	struct Vmxnet3_RxQueueDesc	*rqd_start;	/* all rx queue desc */
 	struct net_device		*netdev;
 	struct pci_dev			*pdev;

 	u8			__iomem *hw_addr0; /* for BAR 0 */
 	u8			__iomem *hw_addr1; /* for BAR 1 */
 	u8                              version;

 	bool				rxcsum;
 	bool				lro;

 #ifdef VMXNET3_RSS
 	struct UPT1_RSSConf		*rss_conf;
 	bool				rss;
 #endif
 	u32				num_rx_queues;
 	u32				num_tx_queues;

 	/* 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;

 	/* Ring sizes */
 	u32 tx_ring_size;
 	u32 rx_ring_size;
 	u32 rx_ring2_size;

 	struct work_struct work;

 	unsigned long  state;    /* VMXNET3_STATE_BIT_xxx */

 	int share_intr;

 	dma_addr_t adapter_pa;
 	dma_addr_t pm_conf_pa;
 	dma_addr_t rss_conf_pa;
 };

 #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_DEF_RX_RING2_SIZE   128

 #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_all(struct vmxnet3_adapter *adapter);

 void
 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter);

 int
 vmxnet3_set_features(struct net_device *netdev, netdev_features_t features);

 int
 vmxnet3_create_queues(struct vmxnet3_adapter *adapter,
 		      u32 tx_ring_size, u32 rx_ring_size, u32 rx_ring2_size);

 void vmxnet3_set_ethtool_ops(struct net_device *netdev);

 struct rtnl_link_stats64 *
 vmxnet3_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats);

 extern char vmxnet3_driver_name[];
 #endif
	/*
	* 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/bitops.h>
	#include <linux/ethtool.h>
	#include <linux/delay.h>
	#include <linux/netdevice.h>
	#include <linux/pci.h>
	#include <linux/compiler.h>
	#include <linux/slab.h>
	#include <linux/spinlock.h>
	#include <linux/ioport.h>
	#include <linux/highmem.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/log2.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 "1.4.3.0-k"

	/* a 32-bit int, each byte encode a verion number in VMXNET3_DRIVER_VERSION */
	#define VMXNET3_DRIVER_VERSION_NUM 0x01040300

	#if defined(CONFIG_PCI_MSI)
	/* RSS only makes sense if MSI-X is supported. */
	#define VMXNET3_RSS
	#endif

	/*
	* 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_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;
	bool ipv6;
	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 {
	char name[IFNAMSIZ+8]; /* To identify interrupt */
	struct vmxnet3_adapter *adapter;
	spinlock_t tx_lock;
	struct vmxnet3_cmd_ring tx_ring;
	struct vmxnet3_tx_buf_info *buf_info;
	dma_addr_t buf_info_pa;
	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 */
	int qid;
	} __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 {
	char name[IFNAMSIZ + 8]; /* To identify interrupt */
	struct vmxnet3_adapter *adapter;
	struct napi_struct napi;
	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 */
	struct vmxnet3_rx_buf_info *buf_info[2];
	dma_addr_t buf_info_pa;
	struct Vmxnet3_RxQueueCtrl *shared;
	struct vmxnet3_rq_driver_stats stats;
	} __attribute__((__aligned__(SMP_CACHE_BYTES)));

	#define VMXNET3_DEVICE_MAX_TX_QUEUES 8
	#define VMXNET3_DEVICE_MAX_RX_QUEUES 8 /* Keep this value as a power of 2 */

	/* Should be less than UPT1_RSS_MAX_IND_TABLE_SIZE */
	#define VMXNET3_RSS_IND_TABLE_SIZE (VMXNET3_DEVICE_MAX_RX_QUEUES * 4)

	#define VMXNET3_LINUX_MAX_MSIX_VECT (VMXNET3_DEVICE_MAX_TX_QUEUES + \
	VMXNET3_DEVICE_MAX_RX_QUEUES + 1)
	#define VMXNET3_LINUX_MIN_MSIX_VECT 2 /* 1 for tx-rx pair and 1 for event */


	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 */
	char event_msi_vector_name[IFNAMSIZ+11];
	#ifdef CONFIG_PCI_MSI
	struct msix_entry msix_entries[VMXNET3_LINUX_MAX_MSIX_VECT];
	#endif
	};

	/* Interrupt sharing schemes, share_intr */
	#define VMXNET3_INTR_BUDDYSHARE 0 /* Corresponding tx,rx queues share irq */
	#define VMXNET3_INTR_TXSHARE 1 /* All tx queues share one irq */
	#define VMXNET3_INTR_DONTSHARE 2 /* each queue has its own irq */


	#define VMXNET3_STATE_BIT_RESETTING 0
	#define VMXNET3_STATE_BIT_QUIESCED 1
	struct vmxnet3_adapter {
	struct vmxnet3_tx_queue tx_queue[VMXNET3_DEVICE_MAX_TX_QUEUES];
	struct vmxnet3_rx_queue rx_queue[VMXNET3_DEVICE_MAX_RX_QUEUES];
	unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
	struct vmxnet3_intr intr;
	spinlock_t cmd_lock;
	struct Vmxnet3_DriverShared *shared;
	struct Vmxnet3_PMConf *pm_conf;
	struct Vmxnet3_TxQueueDesc tqd_start; / all tx queue desc */
	struct Vmxnet3_RxQueueDesc rqd_start; / all rx queue desc */
	struct net_device *netdev;
	struct pci_dev *pdev;

	u8 __iomem hw_addr0; / for BAR 0 */
	u8 __iomem hw_addr1; / for BAR 1 */
	u8 version;

	bool rxcsum;
	bool lro;

	#ifdef VMXNET3_RSS
	struct UPT1_RSSConf *rss_conf;
	bool rss;
	#endif
	u32 num_rx_queues;
	u32 num_tx_queues;

	/* 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;

	/* Ring sizes */
	u32 tx_ring_size;
	u32 rx_ring_size;
	u32 rx_ring2_size;

	struct work_struct work;

	unsigned long state; /* VMXNET3_STATE_BIT_xxx */

	int share_intr;

	dma_addr_t adapter_pa;
	dma_addr_t pm_conf_pa;
	dma_addr_t rss_conf_pa;
	};

	#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_DEF_RX_RING2_SIZE 128

	#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_all(struct vmxnet3_adapter *adapter);

	void
	vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter);

	int
	vmxnet3_set_features(struct net_device *netdev, netdev_features_t features);

	int
	vmxnet3_create_queues(struct vmxnet3_adapter *adapter,
	u32 tx_ring_size, u32 rx_ring_size, u32 rx_ring2_size);

	void vmxnet3_set_ethtool_ops(struct net_device *netdev);

	struct rtnl_link_stats64 *
	vmxnet3_get_stats64(struct net_device dev, struct rtnl_link_stats64 stats);

	extern char vmxnet3_driver_name[];
	#endif