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/*
* Copyright (c) 2018 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __included_virtio_pci_h__
#define __included_virtio_pci_h__
/* VirtIO ABI version, this must match exactly. */
#define VIRTIO_PCI_ABI_VERSION 0
/* VirtIO device IDs. */
#define VIRTIO_ID_NETWORK 0x01
/*
* Vector value used to disable MSI for queue.
* define in include/linux/virtio_pci.h
*/
#define VIRTIO_MSI_NO_VECTOR 0xFFFF
/* The bit of the ISR which indicates a device has an interrupt. */
#define VIRTIO_PCI_ISR_INTR 0x1
/* The bit of the ISR which indicates a device configuration change. */
#define VIRTIO_PCI_ISR_CONFIG 0x2
/* Status byte for guest to report progress. */
#define foreach_virtio_config_status_flags \
_ (VIRTIO_CONFIG_STATUS_RESET, 0x00) \
_ (VIRTIO_CONFIG_STATUS_ACK, 0x01) \
_ (VIRTIO_CONFIG_STATUS_DRIVER, 0x02) \
_ (VIRTIO_CONFIG_STATUS_DRIVER_OK, 0x04) \
_ (VIRTIO_CONFIG_STATUS_FEATURES_OK, 0x08) \
_ (VIRTIO_CONFIG_STATUS_DEVICE_NEEDS_RESET, 0x40) \
_ (VIRTIO_CONFIG_STATUS_FAILED, 0x80)
typedef enum
{
#define _(a, b) a = b,
foreach_virtio_config_status_flags
#undef _
} virtio_config_status_flags_t;
#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
#define VIRTIO_NET_S_ANNOUNCE 2 /* Announcement is needed */
#define VIRTIO_NET_OK 0
#define VIRTIO_NET_ERR 1
/* If multiqueue is provided by host, then we support it. */
#define VIRTIO_NET_CTRL_MQ 4
#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET 0
#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN 1
#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX 0x8000
/*
* Control network offloads
* Reconfigures the network offloads that Guest can handle.
* Available with the VIRTIO_NET_F_CTRL_GUEST_OFFLOADS feature bit.
* Command data format matches the feature bit mask exactly.
* See VIRTIO_NET_F_GUEST_* for the list of offloads
* that can be enabled/disabled.
*/
#define VIRTIO_NET_CTRL_GUEST_OFFLOADS 5
#define VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET 0
/* Common configuration */
#define VIRTIO_PCI_CAP_COMMON_CFG 1
/* Notifications */
#define VIRTIO_PCI_CAP_NOTIFY_CFG 2
/* ISR Status */
#define VIRTIO_PCI_CAP_ISR_CFG 3
/* Device specific configuration */
#define VIRTIO_PCI_CAP_DEVICE_CFG 4
/* PCI configuration access */
#define VIRTIO_PCI_CAP_PCI_CFG 5
#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
#define VIRTIO_PCI_VRING_ALIGN 4096
typedef enum
{
VIRTIO_MSIX_NONE = 0,
VIRTIO_MSIX_DISABLED = 1,
VIRTIO_MSIX_ENABLED = 2
} virtio_msix_status_t;
/* This is the PCI capability header: */
typedef struct
{
u8 cap_vndr; /* Generic PCI field: PCI_CAP_ID_VNDR */
u8 cap_next; /* Generic PCI field: next ptr. */
u8 cap_len; /* Generic PCI field: capability length */
u8 cfg_type; /* Identifies the structure. */
u8 bar; /* Where to find it. */
u8 padding[3]; /* Pad to full dword. */
u32 offset; /* Offset within bar. */
u32 length; /* Length of the structure, in bytes. */
} virtio_pci_cap_t;
typedef struct
{
virtio_pci_cap_t cap;
u32 notify_off_multiplier; /* Multiplier for queue_notify_off. */
} virtio_pci_notify_cap_t;
/* Fields in VIRTIO_PCI_CAP_COMMON_CFG: */
typedef struct
{
/* About the whole device. */
u32 device_feature_select; /* read-write */
u32 device_feature; /* read-only */
u32 driver_feature_select; /* read-write */
u32 driver_feature; /* read-write */
u16 msix_config; /* read-write */
u16 num_queues; /* read-only */
u8 device_status; /* read-write */
u8 config_generation; /* read-only */
/* About a specific virtqueue. */
u16 queue_select; /* read-write */
u16 queue_size; /* read-write, power of 2. */
u16 queue_msix_vector; /* read-write */
u16 queue_enable; /* read-write */
u16 queue_notify_off; /* read-only */
u64 queue_desc; /* read-write */
u64 queue_driver; /* read-write */
u64 queue_device; /* read-write */
} virtio_pci_common_cfg_t;
typedef struct
{
u8 mac[6];
u16 status;
u16 max_virtqueue_pairs;
u16 mtu;
} virtio_net_config_t;
/*
* Control virtqueue data structures
*
* The control virtqueue expects a header in the first sg entry
* and an ack/status response in the last entry. Data for the
* command goes in between.
*/
/* *INDENT-OFF* */
typedef CLIB_PACKED (struct
{
u8 class;
u8 cmd;
}) virtio_net_ctrl_hdr_t;
/* *INDENT-ON* */
typedef u8 virtio_net_ctrl_ack_t;
typedef struct
{
virtio_net_ctrl_hdr_t ctrl;
virtio_net_ctrl_ack_t status;
u8 data[1024];
} virtio_ctrl_msg_t;
typedef struct _virtio_pci_func
{
void (*read_config) (vlib_main_t * vm, virtio_if_t * vif, void *dst,
int len, u32 addr);
void (*write_config) (vlib_main_t * vm, virtio_if_t * vif, void *src,
int len, u32 addr);
u64 (*get_device_features) (vlib_main_t * vm, virtio_if_t * vif);
u64 (*get_driver_features) (vlib_main_t * vm, virtio_if_t * vif);
void (*set_driver_features) (vlib_main_t * vm, virtio_if_t * vif,
u64 features);
u8 (*get_status) (vlib_main_t * vm, virtio_if_t * vif);
void (*set_status) (vlib_main_t * vm, virtio_if_t * vif, u8 status);
u8 (*device_reset) (vlib_main_t * vm, virtio_if_t * vif);
u8 (*get_isr) (vlib_main_t * vm, virtio_if_t * vif);
u16 (*get_queue_size) (vlib_main_t * vm, virtio_if_t * vif, u16 queue_id);
void (*set_queue_size) (vlib_main_t * vm, virtio_if_t * vif, u16 queue_id,
u16 queue_size);
u8 (*setup_queue) (vlib_main_t * vm, virtio_if_t * vif, u16 queue_id,
void *p);
void (*del_queue) (vlib_main_t * vm, virtio_if_t * vif, u16 queue_id);
void (*notify_queue) (vlib_main_t * vm, virtio_if_t * vif, u16 queue_id);
u16 (*set_config_irq) (vlib_main_t * vm, virtio_if_t * vif, u16 vec);
u16 (*set_queue_irq) (vlib_main_t * vm, virtio_if_t * vif, u16 vec,
u16 queue_id);
void (*get_mac) (vlib_main_t * vm, virtio_if_t * vif);
void (*set_mac) (vlib_main_t * vm, virtio_if_t * vif);
u16 (*get_device_status) (vlib_main_t * vm, virtio_if_t * vif);
u16 (*get_max_queue_pairs) (vlib_main_t * vm, virtio_if_t * vif);
u16 (*get_mtu) (vlib_main_t * vm, virtio_if_t * vif);
void (*device_debug_config_space) (vlib_main_t * vm, virtio_if_t * vif);
} virtio_pci_func_t;
#define foreach_virtio_flags \
_ (GSO, 0) \
_ (CSUM_OFFLOAD, 1) \
_ (GRO_COALESCE, 2) \
_ (PACKED, 3) \
_ (IN_ORDER, 4) \
_ (BUFFERING, 5)
typedef enum
{
#define _(a, b) VIRTIO_FLAG_##a = (1 << b),
foreach_virtio_flags
#undef _
} virtio_flag_t;
typedef struct
{
u32 addr;
/* return */
i32 rv;
u32 sw_if_index;
u8 mac_addr_set;
u8 mac_addr[6];
u64 features;
u8 gso_enabled;
u8 checksum_offload_enabled;
u32 buffering_size;
u32 virtio_flags;
clib_error_t *error;
} virtio_pci_create_if_args_t;
extern const virtio_pci_func_t virtio_pci_legacy_func;
extern const virtio_pci_func_t virtio_pci_modern_func;
extern void device_status (vlib_main_t * vm, virtio_if_t * vif);
void virtio_pci_create_if (vlib_main_t * vm,
virtio_pci_create_if_args_t * args);
int virtio_pci_delete_if (vlib_main_t * vm, virtio_if_t * ad);
int virtio_pci_enable_disable_offloads (vlib_main_t * vm, virtio_if_t * vif,
int gso_enabled,
int checksum_offload_enabled,
int offloads_disabled);
#endif /* __included_virtio_pci_h__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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