/* * 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 VNET_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. */ typedef CLIB_PACKED (struct { u8 class; u8 cmd; }) virtio_net_ctrl_hdr_t; 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, vnet_virtio_vring_t *vring); void (*del_queue) (vlib_main_t * vm, virtio_if_t * vif, u16 queue_id); u16 (*get_queue_notify_off) (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 queue_notify_offset); 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 enum { VIRTIO_BIND_NONE = 0, VIRTIO_BIND_DEFAULT = 1, VIRTIO_BIND_FORCE = 2, } __clib_packed virtio_bind_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 tx_queue_size; virtio_bind_t bind; 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: */