![Shrikrishna Khare](/assets/img/avatar_default.png)
Device emulation supports max size of 4096. Signed-off-by: Shrikrishna Khare <skhare@vmware.com> Signed-off-by: Bhavesh Davda <bhavesh@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
430 lines
12 KiB
C
430 lines
12 KiB
C
/*
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* Linux driver for VMware's vmxnet3 ethernet NIC.
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*
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* Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; version 2 of the License and no later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* The full GNU General Public License is included in this distribution in
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* the file called "COPYING".
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*
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* Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com>
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*
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*/
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#ifndef _VMXNET3_INT_H
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#define _VMXNET3_INT_H
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#include <linux/bitops.h>
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#include <linux/ethtool.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/pci.h>
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#include <linux/compiler.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/ioport.h>
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#include <linux/highmem.h>
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#include <linux/timer.h>
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#include <linux/skbuff.h>
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#include <linux/interrupt.h>
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#include <linux/workqueue.h>
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#include <linux/uaccess.h>
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#include <asm/dma.h>
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#include <asm/page.h>
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#include <linux/tcp.h>
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#include <linux/udp.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/in.h>
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#include <linux/etherdevice.h>
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#include <asm/checksum.h>
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#include <linux/if_vlan.h>
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#include <linux/if_arp.h>
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#include <linux/inetdevice.h>
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#include <linux/log2.h>
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#include "vmxnet3_defs.h"
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#ifdef DEBUG
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# define VMXNET3_DRIVER_VERSION_REPORT VMXNET3_DRIVER_VERSION_STRING"-NAPI(debug)"
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#else
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# define VMXNET3_DRIVER_VERSION_REPORT VMXNET3_DRIVER_VERSION_STRING"-NAPI"
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#endif
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/*
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* Version numbers
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*/
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#define VMXNET3_DRIVER_VERSION_STRING "1.4.6.0-k"
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/* a 32-bit int, each byte encode a verion number in VMXNET3_DRIVER_VERSION */
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#define VMXNET3_DRIVER_VERSION_NUM 0x01040600
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#if defined(CONFIG_PCI_MSI)
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/* RSS only makes sense if MSI-X is supported. */
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#define VMXNET3_RSS
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#endif
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/*
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* Capabilities
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*/
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enum {
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VMNET_CAP_SG = 0x0001, /* Can do scatter-gather transmits. */
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VMNET_CAP_IP4_CSUM = 0x0002, /* Can checksum only TCP/UDP over
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* IPv4 */
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VMNET_CAP_HW_CSUM = 0x0004, /* Can checksum all packets. */
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VMNET_CAP_HIGH_DMA = 0x0008, /* Can DMA to high memory. */
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VMNET_CAP_TOE = 0x0010, /* Supports TCP/IP offload. */
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VMNET_CAP_TSO = 0x0020, /* Supports TCP Segmentation
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* offload */
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VMNET_CAP_SW_TSO = 0x0040, /* Supports SW TCP Segmentation */
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VMNET_CAP_VMXNET_APROM = 0x0080, /* Vmxnet APROM support */
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VMNET_CAP_HW_TX_VLAN = 0x0100, /* Can we do VLAN tagging in HW */
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VMNET_CAP_HW_RX_VLAN = 0x0200, /* Can we do VLAN untagging in HW */
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VMNET_CAP_SW_VLAN = 0x0400, /* VLAN tagging/untagging in SW */
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VMNET_CAP_WAKE_PCKT_RCV = 0x0800, /* Can wake on network packet recv? */
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VMNET_CAP_ENABLE_INT_INLINE = 0x1000, /* Enable Interrupt Inline */
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VMNET_CAP_ENABLE_HEADER_COPY = 0x2000, /* copy header for vmkernel */
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VMNET_CAP_TX_CHAIN = 0x4000, /* Guest can use multiple tx entries
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* for a pkt */
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VMNET_CAP_RX_CHAIN = 0x8000, /* pkt can span multiple rx entries */
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VMNET_CAP_LPD = 0x10000, /* large pkt delivery */
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VMNET_CAP_BPF = 0x20000, /* BPF Support in VMXNET Virtual HW*/
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VMNET_CAP_SG_SPAN_PAGES = 0x40000, /* Scatter-gather can span multiple*/
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/* pages transmits */
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VMNET_CAP_IP6_CSUM = 0x80000, /* Can do IPv6 csum offload. */
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VMNET_CAP_TSO6 = 0x100000, /* TSO seg. offload for IPv6 pkts. */
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VMNET_CAP_TSO256k = 0x200000, /* Can do TSO seg offload for */
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/* pkts up to 256kB. */
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VMNET_CAP_UPT = 0x400000 /* Support UPT */
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};
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/*
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* PCI vendor and device IDs.
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*/
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#define PCI_DEVICE_ID_VMWARE_VMXNET3 0x07B0
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#define MAX_ETHERNET_CARDS 10
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#define MAX_PCI_PASSTHRU_DEVICE 6
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struct vmxnet3_cmd_ring {
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union Vmxnet3_GenericDesc *base;
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u32 size;
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u32 next2fill;
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u32 next2comp;
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u8 gen;
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dma_addr_t basePA;
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};
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static inline void
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vmxnet3_cmd_ring_adv_next2fill(struct vmxnet3_cmd_ring *ring)
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{
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ring->next2fill++;
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if (unlikely(ring->next2fill == ring->size)) {
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ring->next2fill = 0;
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VMXNET3_FLIP_RING_GEN(ring->gen);
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}
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}
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static inline void
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vmxnet3_cmd_ring_adv_next2comp(struct vmxnet3_cmd_ring *ring)
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{
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VMXNET3_INC_RING_IDX_ONLY(ring->next2comp, ring->size);
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}
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static inline int
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vmxnet3_cmd_ring_desc_avail(struct vmxnet3_cmd_ring *ring)
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{
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return (ring->next2comp > ring->next2fill ? 0 : ring->size) +
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ring->next2comp - ring->next2fill - 1;
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}
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struct vmxnet3_comp_ring {
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union Vmxnet3_GenericDesc *base;
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u32 size;
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u32 next2proc;
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u8 gen;
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u8 intr_idx;
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dma_addr_t basePA;
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};
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static inline void
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vmxnet3_comp_ring_adv_next2proc(struct vmxnet3_comp_ring *ring)
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{
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ring->next2proc++;
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if (unlikely(ring->next2proc == ring->size)) {
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ring->next2proc = 0;
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VMXNET3_FLIP_RING_GEN(ring->gen);
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}
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}
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struct vmxnet3_tx_data_ring {
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struct Vmxnet3_TxDataDesc *base;
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u32 size;
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dma_addr_t basePA;
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};
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enum vmxnet3_buf_map_type {
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VMXNET3_MAP_INVALID = 0,
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VMXNET3_MAP_NONE,
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VMXNET3_MAP_SINGLE,
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VMXNET3_MAP_PAGE,
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};
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struct vmxnet3_tx_buf_info {
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u32 map_type;
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u16 len;
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u16 sop_idx;
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dma_addr_t dma_addr;
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struct sk_buff *skb;
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};
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struct vmxnet3_tq_driver_stats {
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u64 drop_total; /* # of pkts dropped by the driver, the
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* counters below track droppings due to
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* different reasons
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*/
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u64 drop_too_many_frags;
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u64 drop_oversized_hdr;
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u64 drop_hdr_inspect_err;
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u64 drop_tso;
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u64 tx_ring_full;
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u64 linearized; /* # of pkts linearized */
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u64 copy_skb_header; /* # of times we have to copy skb header */
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u64 oversized_hdr;
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};
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struct vmxnet3_tx_ctx {
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bool ipv4;
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bool ipv6;
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u16 mss;
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u32 eth_ip_hdr_size; /* only valid for pkts requesting tso or csum
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* offloading
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*/
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u32 l4_hdr_size; /* only valid if mss != 0 */
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u32 copy_size; /* # of bytes copied into the data ring */
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union Vmxnet3_GenericDesc *sop_txd;
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union Vmxnet3_GenericDesc *eop_txd;
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};
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struct vmxnet3_tx_queue {
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char name[IFNAMSIZ+8]; /* To identify interrupt */
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struct vmxnet3_adapter *adapter;
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spinlock_t tx_lock;
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struct vmxnet3_cmd_ring tx_ring;
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struct vmxnet3_tx_buf_info *buf_info;
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dma_addr_t buf_info_pa;
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struct vmxnet3_tx_data_ring data_ring;
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struct vmxnet3_comp_ring comp_ring;
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struct Vmxnet3_TxQueueCtrl *shared;
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struct vmxnet3_tq_driver_stats stats;
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bool stopped;
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int num_stop; /* # of times the queue is
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* stopped */
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int qid;
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} __attribute__((__aligned__(SMP_CACHE_BYTES)));
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enum vmxnet3_rx_buf_type {
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VMXNET3_RX_BUF_NONE = 0,
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VMXNET3_RX_BUF_SKB = 1,
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VMXNET3_RX_BUF_PAGE = 2
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};
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struct vmxnet3_rx_buf_info {
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enum vmxnet3_rx_buf_type buf_type;
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u16 len;
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union {
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struct sk_buff *skb;
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struct page *page;
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};
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dma_addr_t dma_addr;
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};
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struct vmxnet3_rx_ctx {
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struct sk_buff *skb;
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u32 sop_idx;
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};
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struct vmxnet3_rq_driver_stats {
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u64 drop_total;
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u64 drop_err;
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u64 drop_fcs;
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u64 rx_buf_alloc_failure;
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};
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struct vmxnet3_rx_queue {
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char name[IFNAMSIZ + 8]; /* To identify interrupt */
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struct vmxnet3_adapter *adapter;
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struct napi_struct napi;
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struct vmxnet3_cmd_ring rx_ring[2];
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struct vmxnet3_comp_ring comp_ring;
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struct vmxnet3_rx_ctx rx_ctx;
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u32 qid; /* rqID in RCD for buffer from 1st ring */
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u32 qid2; /* rqID in RCD for buffer from 2nd ring */
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struct vmxnet3_rx_buf_info *buf_info[2];
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dma_addr_t buf_info_pa;
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struct Vmxnet3_RxQueueCtrl *shared;
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struct vmxnet3_rq_driver_stats stats;
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} __attribute__((__aligned__(SMP_CACHE_BYTES)));
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#define VMXNET3_DEVICE_MAX_TX_QUEUES 8
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#define VMXNET3_DEVICE_MAX_RX_QUEUES 8 /* Keep this value as a power of 2 */
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/* Should be less than UPT1_RSS_MAX_IND_TABLE_SIZE */
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#define VMXNET3_RSS_IND_TABLE_SIZE (VMXNET3_DEVICE_MAX_RX_QUEUES * 4)
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#define VMXNET3_LINUX_MAX_MSIX_VECT (VMXNET3_DEVICE_MAX_TX_QUEUES + \
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VMXNET3_DEVICE_MAX_RX_QUEUES + 1)
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#define VMXNET3_LINUX_MIN_MSIX_VECT 2 /* 1 for tx-rx pair and 1 for event */
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struct vmxnet3_intr {
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enum vmxnet3_intr_mask_mode mask_mode;
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enum vmxnet3_intr_type type; /* MSI-X, MSI, or INTx? */
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u8 num_intrs; /* # of intr vectors */
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u8 event_intr_idx; /* idx of the intr vector for event */
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u8 mod_levels[VMXNET3_LINUX_MAX_MSIX_VECT]; /* moderation level */
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char event_msi_vector_name[IFNAMSIZ+11];
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#ifdef CONFIG_PCI_MSI
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struct msix_entry msix_entries[VMXNET3_LINUX_MAX_MSIX_VECT];
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#endif
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};
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/* Interrupt sharing schemes, share_intr */
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#define VMXNET3_INTR_BUDDYSHARE 0 /* Corresponding tx,rx queues share irq */
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#define VMXNET3_INTR_TXSHARE 1 /* All tx queues share one irq */
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#define VMXNET3_INTR_DONTSHARE 2 /* each queue has its own irq */
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#define VMXNET3_STATE_BIT_RESETTING 0
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#define VMXNET3_STATE_BIT_QUIESCED 1
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struct vmxnet3_adapter {
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struct vmxnet3_tx_queue tx_queue[VMXNET3_DEVICE_MAX_TX_QUEUES];
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struct vmxnet3_rx_queue rx_queue[VMXNET3_DEVICE_MAX_RX_QUEUES];
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unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
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struct vmxnet3_intr intr;
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spinlock_t cmd_lock;
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struct Vmxnet3_DriverShared *shared;
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struct Vmxnet3_PMConf *pm_conf;
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struct Vmxnet3_TxQueueDesc *tqd_start; /* all tx queue desc */
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struct Vmxnet3_RxQueueDesc *rqd_start; /* all rx queue desc */
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struct net_device *netdev;
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struct pci_dev *pdev;
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u8 __iomem *hw_addr0; /* for BAR 0 */
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u8 __iomem *hw_addr1; /* for BAR 1 */
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u8 version;
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bool rxcsum;
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bool lro;
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#ifdef VMXNET3_RSS
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struct UPT1_RSSConf *rss_conf;
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bool rss;
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#endif
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u32 num_rx_queues;
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u32 num_tx_queues;
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/* rx buffer related */
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unsigned skb_buf_size;
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int rx_buf_per_pkt; /* only apply to the 1st ring */
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dma_addr_t shared_pa;
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dma_addr_t queue_desc_pa;
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/* Wake-on-LAN */
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u32 wol;
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/* Link speed */
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u32 link_speed; /* in mbps */
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u64 tx_timeout_count;
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/* Ring sizes */
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u32 tx_ring_size;
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u32 rx_ring_size;
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u32 rx_ring2_size;
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struct work_struct work;
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unsigned long state; /* VMXNET3_STATE_BIT_xxx */
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int share_intr;
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dma_addr_t adapter_pa;
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dma_addr_t pm_conf_pa;
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dma_addr_t rss_conf_pa;
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};
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#define VMXNET3_WRITE_BAR0_REG(adapter, reg, val) \
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writel((val), (adapter)->hw_addr0 + (reg))
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#define VMXNET3_READ_BAR0_REG(adapter, reg) \
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readl((adapter)->hw_addr0 + (reg))
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#define VMXNET3_WRITE_BAR1_REG(adapter, reg, val) \
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writel((val), (adapter)->hw_addr1 + (reg))
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#define VMXNET3_READ_BAR1_REG(adapter, reg) \
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readl((adapter)->hw_addr1 + (reg))
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#define VMXNET3_WAKE_QUEUE_THRESHOLD(tq) (5)
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#define VMXNET3_RX_ALLOC_THRESHOLD(rq, ring_idx, adapter) \
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((rq)->rx_ring[ring_idx].size >> 3)
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#define VMXNET3_GET_ADDR_LO(dma) ((u32)(dma))
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#define VMXNET3_GET_ADDR_HI(dma) ((u32)(((u64)(dma)) >> 32))
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/* must be a multiple of VMXNET3_RING_SIZE_ALIGN */
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#define VMXNET3_DEF_TX_RING_SIZE 512
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#define VMXNET3_DEF_RX_RING_SIZE 256
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#define VMXNET3_DEF_RX_RING2_SIZE 128
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#define VMXNET3_MAX_ETH_HDR_SIZE 22
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#define VMXNET3_MAX_SKB_BUF_SIZE (3*1024)
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int
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vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter);
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int
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vmxnet3_activate_dev(struct vmxnet3_adapter *adapter);
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void
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vmxnet3_force_close(struct vmxnet3_adapter *adapter);
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void
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vmxnet3_reset_dev(struct vmxnet3_adapter *adapter);
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void
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vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter);
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void
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vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter);
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int
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vmxnet3_set_features(struct net_device *netdev, netdev_features_t features);
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int
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vmxnet3_create_queues(struct vmxnet3_adapter *adapter,
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u32 tx_ring_size, u32 rx_ring_size, u32 rx_ring2_size);
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void vmxnet3_set_ethtool_ops(struct net_device *netdev);
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struct rtnl_link_stats64 *
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vmxnet3_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats);
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extern char vmxnet3_driver_name[];
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#endif
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