1 /* 2 * libqos virtio definitions 3 * 4 * Copyright (c) 2014 Marc Marí 5 * 6 * This work is licensed under the terms of the GNU GPL, version 2 or later. 7 * See the COPYING file in the top-level directory. 8 */ 9 10 #ifndef LIBQOS_VIRTIO_H 11 #define LIBQOS_VIRTIO_H 12 13 #include "libqos-malloc.h" 14 #include "standard-headers/linux/virtio_ring.h" 15 16 #define QVIRTIO_F_BAD_FEATURE 0x40000000ull 17 18 typedef struct QVirtioBus QVirtioBus; 19 20 typedef struct QVirtioDevice { 21 const QVirtioBus *bus; 22 /* Device type */ 23 uint16_t device_type; 24 uint64_t features; 25 bool big_endian; 26 bool features_negotiated; 27 } QVirtioDevice; 28 29 typedef struct QVirtQueue { 30 QVirtioDevice *vdev; 31 uint64_t desc; /* This points to an array of struct vring_desc */ 32 uint64_t avail; /* This points to a struct vring_avail */ 33 uint64_t used; /* This points to a struct vring_used */ 34 uint16_t index; 35 uint32_t size; 36 uint32_t free_head; 37 uint32_t num_free; 38 uint32_t align; 39 uint16_t last_used_idx; 40 bool indirect; 41 bool event; 42 } QVirtQueue; 43 44 typedef struct QVRingIndirectDesc { 45 uint64_t desc; /* This points to an array fo struct vring_desc */ 46 uint16_t index; 47 uint16_t elem; 48 } QVRingIndirectDesc; 49 50 struct QVirtioBus { 51 uint8_t (*config_readb)(QVirtioDevice *d, uint64_t addr); 52 uint16_t (*config_readw)(QVirtioDevice *d, uint64_t addr); 53 uint32_t (*config_readl)(QVirtioDevice *d, uint64_t addr); 54 uint64_t (*config_readq)(QVirtioDevice *d, uint64_t addr); 55 56 /* Get features of the device */ 57 uint64_t (*get_features)(QVirtioDevice *d); 58 59 /* Set features of the device */ 60 void (*set_features)(QVirtioDevice *d, uint64_t features); 61 62 /* Get features of the guest */ 63 uint64_t (*get_guest_features)(QVirtioDevice *d); 64 65 /* Get status of the device */ 66 uint8_t (*get_status)(QVirtioDevice *d); 67 68 /* Set status of the device */ 69 void (*set_status)(QVirtioDevice *d, uint8_t status); 70 71 /* Get the queue ISR status of the device */ 72 bool (*get_queue_isr_status)(QVirtioDevice *d, QVirtQueue *vq); 73 74 /* Wait for the configuration ISR status of the device */ 75 void (*wait_config_isr_status)(QVirtioDevice *d, gint64 timeout_us); 76 77 /* Select a queue to work on */ 78 void (*queue_select)(QVirtioDevice *d, uint16_t index); 79 80 /* Get the size of the selected queue */ 81 uint16_t (*get_queue_size)(QVirtioDevice *d); 82 83 /* Set the address of the selected queue */ 84 void (*set_queue_address)(QVirtioDevice *d, QVirtQueue *vq); 85 86 /* Setup the virtqueue specified by index */ 87 QVirtQueue *(*virtqueue_setup)(QVirtioDevice *d, QGuestAllocator *alloc, 88 uint16_t index); 89 90 /* Free virtqueue resources */ 91 void (*virtqueue_cleanup)(QVirtQueue *vq, QGuestAllocator *alloc); 92 93 /* Notify changes in virtqueue */ 94 void (*virtqueue_kick)(QVirtioDevice *d, QVirtQueue *vq); 95 }; 96 97 static inline uint32_t qvring_size(uint32_t num, uint32_t align) 98 { 99 return ((sizeof(struct vring_desc) * num + sizeof(uint16_t) * (3 + num) 100 + align - 1) & ~(align - 1)) 101 + sizeof(uint16_t) * 3 + sizeof(struct vring_used_elem) * num; 102 } 103 104 uint8_t qvirtio_config_readb(QVirtioDevice *d, uint64_t addr); 105 uint16_t qvirtio_config_readw(QVirtioDevice *d, uint64_t addr); 106 uint32_t qvirtio_config_readl(QVirtioDevice *d, uint64_t addr); 107 uint64_t qvirtio_config_readq(QVirtioDevice *d, uint64_t addr); 108 uint64_t qvirtio_get_features(QVirtioDevice *d); 109 void qvirtio_set_features(QVirtioDevice *d, uint64_t features); 110 bool qvirtio_is_big_endian(QVirtioDevice *d); 111 112 void qvirtio_reset(QVirtioDevice *d); 113 void qvirtio_set_acknowledge(QVirtioDevice *d); 114 void qvirtio_set_driver(QVirtioDevice *d); 115 void qvirtio_set_driver_ok(QVirtioDevice *d); 116 117 void qvirtio_wait_queue_isr(QTestState *qts, QVirtioDevice *d, 118 QVirtQueue *vq, gint64 timeout_us); 119 uint8_t qvirtio_wait_status_byte_no_isr(QTestState *qts, QVirtioDevice *d, 120 QVirtQueue *vq, 121 uint64_t addr, 122 gint64 timeout_us); 123 void qvirtio_wait_used_elem(QTestState *qts, QVirtioDevice *d, 124 QVirtQueue *vq, 125 uint32_t desc_idx, 126 uint32_t *len, 127 gint64 timeout_us); 128 void qvirtio_wait_config_isr(QVirtioDevice *d, gint64 timeout_us); 129 QVirtQueue *qvirtqueue_setup(QVirtioDevice *d, 130 QGuestAllocator *alloc, uint16_t index); 131 void qvirtqueue_cleanup(const QVirtioBus *bus, QVirtQueue *vq, 132 QGuestAllocator *alloc); 133 134 void qvring_init(QTestState *qts, const QGuestAllocator *alloc, QVirtQueue *vq, 135 uint64_t addr); 136 QVRingIndirectDesc *qvring_indirect_desc_setup(QTestState *qs, QVirtioDevice *d, 137 QGuestAllocator *alloc, 138 uint16_t elem); 139 void qvring_indirect_desc_add(QVirtioDevice *d, QTestState *qts, 140 QVRingIndirectDesc *indirect, 141 uint64_t data, uint32_t len, bool write); 142 uint32_t qvirtqueue_add(QTestState *qts, QVirtQueue *vq, uint64_t data, 143 uint32_t len, bool write, bool next); 144 uint32_t qvirtqueue_add_indirect(QTestState *qts, QVirtQueue *vq, 145 QVRingIndirectDesc *indirect); 146 void qvirtqueue_kick(QTestState *qts, QVirtioDevice *d, QVirtQueue *vq, 147 uint32_t free_head); 148 bool qvirtqueue_get_buf(QTestState *qts, QVirtQueue *vq, uint32_t *desc_idx, 149 uint32_t *len); 150 151 void qvirtqueue_set_used_event(QTestState *qts, QVirtQueue *vq, uint16_t idx); 152 153 void qvirtio_start_device(QVirtioDevice *vdev); 154 155 #endif 156