tests/qtest/libqos/virtio.h

   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