net: VMware virtual Ethernet NIC driver: vmxnet3
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
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_ */