tests/libqos/virtio-mmio.c

   1 /*
   2  * libqos virtio MMIO driver
   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 #include "qemu/osdep.h"
  11 #include "libqtest.h"
  12 #include "qemu/module.h"
  13 #include "libqos/virtio.h"
  14 #include "libqos/virtio-mmio.h"
  15 #include "libqos/malloc.h"
  16 #include "libqos/qgraph.h"
  17 #include "standard-headers/linux/virtio_ring.h"
  18
  19 static uint8_t qvirtio_mmio_config_readb(QVirtioDevice *d, uint64_t off)
  20 {
  21     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
  22     return qtest_readb(dev->qts, dev->addr + QVIRTIO_MMIO_DEVICE_SPECIFIC + off);
  23 }
  24
  25 static uint16_t qvirtio_mmio_config_readw(QVirtioDevice *d, uint64_t off)
  26 {
  27     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
  28     return qtest_readw(dev->qts, dev->addr + QVIRTIO_MMIO_DEVICE_SPECIFIC + off);
  29 }
  30
  31 static uint32_t qvirtio_mmio_config_readl(QVirtioDevice *d, uint64_t off)
  32 {
  33     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
  34     return qtest_readl(dev->qts, dev->addr + QVIRTIO_MMIO_DEVICE_SPECIFIC + off);
  35 }
  36
  37 static uint64_t qvirtio_mmio_config_readq(QVirtioDevice *d, uint64_t off)
  38 {
  39     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
  40     return qtest_readq(dev->qts, dev->addr + QVIRTIO_MMIO_DEVICE_SPECIFIC + off);
  41 }
  42
  43 static uint32_t qvirtio_mmio_get_features(QVirtioDevice *d)
  44 {
  45     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
  46     qtest_writel(dev->qts, dev->addr + QVIRTIO_MMIO_HOST_FEATURES_SEL, 0);
  47     return qtest_readl(dev->qts, dev->addr + QVIRTIO_MMIO_HOST_FEATURES);
  48 }
  49
  50 static void qvirtio_mmio_set_features(QVirtioDevice *d, uint32_t features)
  51 {
  52     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
  53     dev->features = features;
  54     qtest_writel(dev->qts, dev->addr + QVIRTIO_MMIO_GUEST_FEATURES_SEL, 0);
  55     qtest_writel(dev->qts, dev->addr + QVIRTIO_MMIO_GUEST_FEATURES, features);
  56 }
  57
  58 static uint32_t qvirtio_mmio_get_guest_features(QVirtioDevice *d)
  59 {
  60     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
  61     return dev->features;
  62 }
  63
  64 static uint8_t qvirtio_mmio_get_status(QVirtioDevice *d)
  65 {
  66     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
  67     return (uint8_t)qtest_readl(dev->qts, dev->addr + QVIRTIO_MMIO_DEVICE_STATUS);
  68 }
  69
  70 static void qvirtio_mmio_set_status(QVirtioDevice *d, uint8_t status)
  71 {
  72     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
  73     qtest_writel(dev->qts, dev->addr + QVIRTIO_MMIO_DEVICE_STATUS, (uint32_t)status);
  74 }
  75
  76 static bool qvirtio_mmio_get_queue_isr_status(QVirtioDevice *d, QVirtQueue *vq)
  77 {
  78     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
  79     uint32_t isr;
  80
  81     isr = qtest_readl(dev->qts, dev->addr + QVIRTIO_MMIO_INTERRUPT_STATUS) & 1;
  82     if (isr != 0) {
  83         qtest_writel(dev->qts, dev->addr + QVIRTIO_MMIO_INTERRUPT_ACK, 1);
  84         return true;
  85     }
  86
  87     return false;
  88 }
  89
  90 static bool qvirtio_mmio_get_config_isr_status(QVirtioDevice *d)
  91 {
  92     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
  93     uint32_t isr;
  94
  95     isr = qtest_readl(dev->qts, dev->addr + QVIRTIO_MMIO_INTERRUPT_STATUS) & 2;
  96     if (isr != 0) {
  97         qtest_writel(dev->qts, dev->addr + QVIRTIO_MMIO_INTERRUPT_ACK, 2);
  98         return true;
  99     }
 100
 101     return false;
 102 }
 103
 104 static void qvirtio_mmio_queue_select(QVirtioDevice *d, uint16_t index)
 105 {
 106     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
 107     qtest_writel(dev->qts, dev->addr + QVIRTIO_MMIO_QUEUE_SEL, (uint32_t)index);
 108
 109     g_assert_cmphex(qtest_readl(dev->qts, dev->addr + QVIRTIO_MMIO_QUEUE_PFN), ==, 0);
 110 }
 111
 112 static uint16_t qvirtio_mmio_get_queue_size(QVirtioDevice *d)
 113 {
 114     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
 115     return (uint16_t)qtest_readl(dev->qts, dev->addr + QVIRTIO_MMIO_QUEUE_NUM_MAX);
 116 }
 117
 118 static void qvirtio_mmio_set_queue_address(QVirtioDevice *d, uint32_t pfn)
 119 {
 120     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
 121     qtest_writel(dev->qts, dev->addr + QVIRTIO_MMIO_QUEUE_PFN, pfn);
 122 }
 123
 124 static QVirtQueue *qvirtio_mmio_virtqueue_setup(QVirtioDevice *d,
 125                                         QGuestAllocator *alloc, uint16_t index)
 126 {
 127     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
 128     QVirtQueue *vq;
 129     uint64_t addr;
 130
 131     vq = g_malloc0(sizeof(*vq));
 132     qvirtio_mmio_queue_select(d, index);
 133     qtest_writel(dev->qts, dev->addr + QVIRTIO_MMIO_QUEUE_ALIGN, dev->page_size);
 134
 135     vq->index = index;
 136     vq->size = qvirtio_mmio_get_queue_size(d);
 137     vq->free_head = 0;
 138     vq->num_free = vq->size;
 139     vq->align = dev->page_size;
 140     vq->indirect = (dev->features & (1u << VIRTIO_RING_F_INDIRECT_DESC)) != 0;
 141     vq->event = (dev->features & (1u << VIRTIO_RING_F_EVENT_IDX)) != 0;
 142
 143     qtest_writel(dev->qts, dev->addr + QVIRTIO_MMIO_QUEUE_NUM, vq->size);
 144
 145     /* Check different than 0 */
 146     g_assert_cmpint(vq->size, !=, 0);
 147
 148     /* Check power of 2 */
 149     g_assert_cmpint(vq->size & (vq->size - 1), ==, 0);
 150
 151     addr = guest_alloc(alloc, qvring_size(vq->size, dev->page_size));
 152     qvring_init(dev->qts, alloc, vq, addr);
 153     qvirtio_mmio_set_queue_address(d, vq->desc / dev->page_size);
 154
 155     return vq;
 156 }
 157
 158 static void qvirtio_mmio_virtqueue_cleanup(QVirtQueue *vq,
 159                                            QGuestAllocator *alloc)
 160 {
 161     guest_free(alloc, vq->desc);
 162     g_free(vq);
 163 }
 164
 165 static void qvirtio_mmio_virtqueue_kick(QVirtioDevice *d, QVirtQueue *vq)
 166 {
 167     QVirtioMMIODevice *dev = container_of(d, QVirtioMMIODevice, vdev);
 168     qtest_writel(dev->qts, dev->addr + QVIRTIO_MMIO_QUEUE_NOTIFY, vq->index);
 169 }
 170
 171 const QVirtioBus qvirtio_mmio = {
 172     .config_readb = qvirtio_mmio_config_readb,
 173     .config_readw = qvirtio_mmio_config_readw,
 174     .config_readl = qvirtio_mmio_config_readl,
 175     .config_readq = qvirtio_mmio_config_readq,
 176     .get_features = qvirtio_mmio_get_features,
 177     .set_features = qvirtio_mmio_set_features,
 178     .get_guest_features = qvirtio_mmio_get_guest_features,
 179     .get_status = qvirtio_mmio_get_status,
 180     .set_status = qvirtio_mmio_set_status,
 181     .get_queue_isr_status = qvirtio_mmio_get_queue_isr_status,
 182     .get_config_isr_status = qvirtio_mmio_get_config_isr_status,
 183     .queue_select = qvirtio_mmio_queue_select,
 184     .get_queue_size = qvirtio_mmio_get_queue_size,
 185     .set_queue_address = qvirtio_mmio_set_queue_address,
 186     .virtqueue_setup = qvirtio_mmio_virtqueue_setup,
 187     .virtqueue_cleanup = qvirtio_mmio_virtqueue_cleanup,
 188     .virtqueue_kick = qvirtio_mmio_virtqueue_kick,
 189 };
 190
 191 static void *qvirtio_mmio_get_driver(void *obj, const char *interface)
 192 {
 193     QVirtioMMIODevice *virtio_mmio = obj;
 194     if (!g_strcmp0(interface, "virtio-bus")) {
 195         return &virtio_mmio->vdev;
 196     }
 197     fprintf(stderr, "%s not present in virtio-mmio\n", interface);
 198     g_assert_not_reached();
 199 }
 200
 201 static void qvirtio_mmio_start_hw(QOSGraphObject *obj)
 202 {
 203     QVirtioMMIODevice *dev = (QVirtioMMIODevice *) obj;
 204     qvirtio_start_device(&dev->vdev);
 205 }
 206
 207 void qvirtio_mmio_init_device(QVirtioMMIODevice *dev, QTestState *qts,
 208                               uint64_t addr, uint32_t page_size)
 209 {
 210     uint32_t magic;
 211     magic = qtest_readl(qts, addr + QVIRTIO_MMIO_MAGIC_VALUE);
 212     g_assert(magic == ('v' | 'i' << 8 | 'r' << 16 | 't' << 24));
 213
 214     dev->qts = qts;
 215     dev->addr = addr;
 216     dev->page_size = page_size;
 217     dev->vdev.device_type = qtest_readl(qts, addr + QVIRTIO_MMIO_DEVICE_ID);
 218     dev->vdev.bus = &qvirtio_mmio;
 219
 220     qtest_writel(qts, addr + QVIRTIO_MMIO_GUEST_PAGE_SIZE, page_size);
 221
 222     dev->obj.get_driver = qvirtio_mmio_get_driver;
 223     dev->obj.start_hw = qvirtio_mmio_start_hw;
 224 }
 225
 226 static void virtio_mmio_register_nodes(void)
 227 {
 228     qos_node_create_driver("virtio-mmio", NULL);
 229     qos_node_produces("virtio-mmio", "virtio-bus");
 230 }
 231
 232 libqos_init(virtio_mmio_register_nodes);