1fbc65ea9Ssf /* 2fbc65ea9Ssf * Copyright (c) 2019 Stefan Fritsch <sf@openbsd.org> 3fbc65ea9Ssf * 4fbc65ea9Ssf * Permission to use, copy, modify, and distribute this software for any 5fbc65ea9Ssf * purpose with or without fee is hereby granted, provided that the above 6fbc65ea9Ssf * copyright notice and this permission notice appear in all copies. 7fbc65ea9Ssf * 8fbc65ea9Ssf * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9fbc65ea9Ssf * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10fbc65ea9Ssf * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11fbc65ea9Ssf * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12fbc65ea9Ssf * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13fbc65ea9Ssf * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14fbc65ea9Ssf * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15fbc65ea9Ssf */ 16fbc65ea9Ssf 17fbc65ea9Ssf #ifndef _DEV_PCI_VIRTIO_PCIREG_H_ 18fbc65ea9Ssf #define _DEV_PCI_VIRTIO_PCIREG_H_ 19fbc65ea9Ssf 20fbc65ea9Ssf /* Virtio 0.9 config space */ 21fbc65ea9Ssf #define VIRTIO_CONFIG_DEVICE_FEATURES 0 /* 32bit */ 22fbc65ea9Ssf #define VIRTIO_CONFIG_GUEST_FEATURES 4 /* 32bit */ 23fbc65ea9Ssf #define VIRTIO_CONFIG_QUEUE_ADDRESS 8 /* 32bit */ 24fbc65ea9Ssf #define VIRTIO_CONFIG_QUEUE_SIZE 12 /* 16bit */ 25fbc65ea9Ssf #define VIRTIO_CONFIG_QUEUE_SELECT 14 /* 16bit */ 26fbc65ea9Ssf #define VIRTIO_CONFIG_QUEUE_NOTIFY 16 /* 16bit */ 27fbc65ea9Ssf #define VIRTIO_CONFIG_DEVICE_STATUS 18 /* 8bit */ 28fbc65ea9Ssf #define VIRTIO_CONFIG_ISR_STATUS 19 /* 8bit */ 29fbc65ea9Ssf #define VIRTIO_CONFIG_ISR_CONFIG_CHANGE 2 30fbc65ea9Ssf #define VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI 20 31fbc65ea9Ssf /* Only if MSIX is enabled: */ 32fbc65ea9Ssf #define VIRTIO_MSI_CONFIG_VECTOR 20 /* 16bit, optional */ 33fbc65ea9Ssf #define VIRTIO_MSI_QUEUE_VECTOR 22 /* 16bit, optional */ 34fbc65ea9Ssf #define VIRTIO_CONFIG_DEVICE_CONFIG_MSI 24 35fbc65ea9Ssf 36fbc65ea9Ssf #define VIRTIO_MSI_NO_VECTOR 0xffff 37fbc65ea9Ssf 38*d8499287Ssf /* 39*d8499287Ssf * Virtio 1.0 specific 40*d8499287Ssf */ 41*d8499287Ssf 42*d8499287Ssf struct virtio_pci_cap { 43*d8499287Ssf uint8_t cap_vndr; /* Generic PCI field: PCI_CAP_ID_VNDR */ 44*d8499287Ssf uint8_t cap_next; /* Generic PCI field: next ptr. */ 45*d8499287Ssf uint8_t cap_len; /* Generic PCI field: capability length */ 46*d8499287Ssf uint8_t cfg_type; /* Identifies the structure. */ 47*d8499287Ssf uint8_t bar; /* Where to find it. */ 48*d8499287Ssf uint8_t padding[3]; /* Pad to full dword. */ 49*d8499287Ssf uint32_t offset; /* Offset within bar. */ 50*d8499287Ssf uint32_t length; /* Length of the structure, in bytes. */ 51*d8499287Ssf } __packed; 52*d8499287Ssf 53*d8499287Ssf /* Common configuration */ 54*d8499287Ssf #define VIRTIO_PCI_CAP_COMMON_CFG 1 55*d8499287Ssf /* Notifications */ 56*d8499287Ssf #define VIRTIO_PCI_CAP_NOTIFY_CFG 2 57*d8499287Ssf /* ISR Status */ 58*d8499287Ssf #define VIRTIO_PCI_CAP_ISR_CFG 3 59*d8499287Ssf /* Device specific configuration */ 60*d8499287Ssf #define VIRTIO_PCI_CAP_DEVICE_CFG 4 61*d8499287Ssf /* PCI configuration access */ 62*d8499287Ssf #define VIRTIO_PCI_CAP_PCI_CFG 5 63*d8499287Ssf 64*d8499287Ssf struct virtio_pci_notify_cap { 65*d8499287Ssf struct virtio_pci_cap cap; 66*d8499287Ssf uint32_t notify_off_multiplier; /* Multiplier for queue_notify_off. */ 67*d8499287Ssf } __packed; 68*d8499287Ssf 69*d8499287Ssf struct virtio_pci_cfg_cap { 70*d8499287Ssf struct virtio_pci_cap cap; 71*d8499287Ssf uint8_t pci_cfg_data[4]; /* Data for BAR access. */ 72*d8499287Ssf } __packed; 73*d8499287Ssf 74*d8499287Ssf struct virtio_pci_common_cfg { 75*d8499287Ssf /* About the whole device. */ 76*d8499287Ssf uint32_t device_feature_select; /* read-write */ 77*d8499287Ssf uint32_t device_feature; /* read-only for driver */ 78*d8499287Ssf uint32_t driver_feature_select; /* read-write */ 79*d8499287Ssf uint32_t driver_feature; /* read-write */ 80*d8499287Ssf uint16_t config_msix_vector; /* read-write */ 81*d8499287Ssf uint16_t num_queues; /* read-only for driver */ 82*d8499287Ssf uint8_t device_status; /* read-write */ 83*d8499287Ssf uint8_t config_generation; /* read-only for driver */ 84*d8499287Ssf 85*d8499287Ssf /* About a specific virtqueue. */ 86*d8499287Ssf uint16_t queue_select; /* read-write */ 87*d8499287Ssf uint16_t queue_size; /* read-write, power of 2, or 0. */ 88*d8499287Ssf uint16_t queue_msix_vector; /* read-write */ 89*d8499287Ssf uint16_t queue_enable; /* read-write */ 90*d8499287Ssf uint16_t queue_notify_off; /* read-only for driver */ 91*d8499287Ssf uint64_t queue_desc; /* read-write */ 92*d8499287Ssf uint64_t queue_avail; /* read-write */ 93*d8499287Ssf uint64_t queue_used; /* read-write */ 94*d8499287Ssf } __packed; 95fbc65ea9Ssf 96fbc65ea9Ssf #endif /* _DEV_PCI_VIRTIO_PCIREG_H_ */ 97