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/*
* 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/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/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 "1.1.29.0-k"
/* a 32-bit int, each byte encode a verion number in VMXNET3_DRIVER_VERSION */
#define VMXNET3_DRIVER_VERSION_NUM 0x01011D00
#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_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 {
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;
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 */
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_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 */
#ifdef VMXNET3_RSS
struct UPT1_RSSConf *rss_conf;
bool rss;
#endif
u32 num_rx_queues;
u32 num_tx_queue
|