diff options
Diffstat (limited to 'src/tests/libqos/virtio.c')
| -rw-r--r-- | src/tests/libqos/virtio.c | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/src/tests/libqos/virtio.c b/src/tests/libqos/virtio.c new file mode 100644 index 0000000..3205b88 --- /dev/null +++ b/src/tests/libqos/virtio.c @@ -0,0 +1,281 @@ +/* + * libqos virtio driver + * + * Copyright (c) 2014 Marc Marí + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include <glib.h> +#include "libqtest.h" +#include "libqos/virtio.h" + +uint8_t qvirtio_config_readb(const QVirtioBus *bus, QVirtioDevice *d, + uint64_t addr) +{ + return bus->config_readb(d, addr); +} + +uint16_t qvirtio_config_readw(const QVirtioBus *bus, QVirtioDevice *d, + uint64_t addr) +{ + return bus->config_readw(d, addr); +} + +uint32_t qvirtio_config_readl(const QVirtioBus *bus, QVirtioDevice *d, + uint64_t addr) +{ + return bus->config_readl(d, addr); +} + +uint64_t qvirtio_config_readq(const QVirtioBus *bus, QVirtioDevice *d, + uint64_t addr) +{ + return bus->config_readq(d, addr); +} + +uint32_t qvirtio_get_features(const QVirtioBus *bus, QVirtioDevice *d) +{ + return bus->get_features(d); +} + +void qvirtio_set_features(const QVirtioBus *bus, QVirtioDevice *d, + uint32_t features) +{ + bus->set_features(d, features); +} + +QVirtQueue *qvirtqueue_setup(const QVirtioBus *bus, QVirtioDevice *d, + QGuestAllocator *alloc, uint16_t index) +{ + return bus->virtqueue_setup(d, alloc, index); +} + +void qvirtio_reset(const QVirtioBus *bus, QVirtioDevice *d) +{ + bus->set_status(d, QVIRTIO_RESET); + g_assert_cmphex(bus->get_status(d), ==, QVIRTIO_RESET); +} + +void qvirtio_set_acknowledge(const QVirtioBus *bus, QVirtioDevice *d) +{ + bus->set_status(d, bus->get_status(d) | QVIRTIO_ACKNOWLEDGE); + g_assert_cmphex(bus->get_status(d), ==, QVIRTIO_ACKNOWLEDGE); +} + +void qvirtio_set_driver(const QVirtioBus *bus, QVirtioDevice *d) +{ + bus->set_status(d, bus->get_status(d) | QVIRTIO_DRIVER); + g_assert_cmphex(bus->get_status(d), ==, + QVIRTIO_DRIVER | QVIRTIO_ACKNOWLEDGE); +} + +void qvirtio_set_driver_ok(const QVirtioBus *bus, QVirtioDevice *d) +{ + bus->set_status(d, bus->get_status(d) | QVIRTIO_DRIVER_OK); + g_assert_cmphex(bus->get_status(d), ==, + QVIRTIO_DRIVER_OK | QVIRTIO_DRIVER | QVIRTIO_ACKNOWLEDGE); +} + +void qvirtio_wait_queue_isr(const QVirtioBus *bus, QVirtioDevice *d, + QVirtQueue *vq, gint64 timeout_us) +{ + gint64 start_time = g_get_monotonic_time(); + + for (;;) { + clock_step(100); + if (bus->get_queue_isr_status(d, vq)) { + return; + } + g_assert(g_get_monotonic_time() - start_time <= timeout_us); + } +} + +/* Wait for the status byte at given guest memory address to be set + * + * The virtqueue interrupt must not be raised, making this useful for testing + * event_index functionality. + */ +uint8_t qvirtio_wait_status_byte_no_isr(const QVirtioBus *bus, + QVirtioDevice *d, + QVirtQueue *vq, + uint64_t addr, + gint64 timeout_us) +{ + gint64 start_time = g_get_monotonic_time(); + uint8_t val; + + while ((val = readb(addr)) == 0xff) { + clock_step(100); + g_assert(!bus->get_queue_isr_status(d, vq)); + g_assert(g_get_monotonic_time() - start_time <= timeout_us); + } + return val; +} + +void qvirtio_wait_config_isr(const QVirtioBus *bus, QVirtioDevice *d, + gint64 timeout_us) +{ + gint64 start_time = g_get_monotonic_time(); + + for (;;) { + clock_step(100); + if (bus->get_config_isr_status(d)) { + return; + } + g_assert(g_get_monotonic_time() - start_time <= timeout_us); + } +} + +void qvring_init(const QGuestAllocator *alloc, QVirtQueue *vq, uint64_t addr) +{ + int i; + + vq->desc = addr; + vq->avail = vq->desc + vq->size*sizeof(QVRingDesc); + vq->used = (uint64_t)((vq->avail + sizeof(uint16_t) * (3 + vq->size) + + vq->align - 1) & ~(vq->align - 1)); + + for (i = 0; i < vq->size - 1; i++) { + /* vq->desc[i].addr */ + writew(vq->desc + (16 * i), 0); + /* vq->desc[i].next */ + writew(vq->desc + (16 * i) + 14, i + 1); + } + + /* vq->avail->flags */ + writew(vq->avail, 0); + /* vq->avail->idx */ + writew(vq->avail + 2, 0); + /* vq->avail->used_event */ + writew(vq->avail + 4 + (2 * vq->size), 0); + + /* vq->used->flags */ + writew(vq->used, 0); + /* vq->used->avail_event */ + writew(vq->used+2+(sizeof(struct QVRingUsedElem)*vq->size), 0); +} + +QVRingIndirectDesc *qvring_indirect_desc_setup(QVirtioDevice *d, + QGuestAllocator *alloc, uint16_t elem) +{ + int i; + QVRingIndirectDesc *indirect = g_malloc(sizeof(*indirect)); + + indirect->index = 0; + indirect->elem = elem; + indirect->desc = guest_alloc(alloc, sizeof(QVRingDesc)*elem); + + for (i = 0; i < elem - 1; ++i) { + /* indirect->desc[i].addr */ + writeq(indirect->desc + (16 * i), 0); + /* indirect->desc[i].flags */ + writew(indirect->desc + (16 * i) + 12, QVRING_DESC_F_NEXT); + /* indirect->desc[i].next */ + writew(indirect->desc + (16 * i) + 14, i + 1); + } + + return indirect; +} + +void qvring_indirect_desc_add(QVRingIndirectDesc *indirect, uint64_t data, + uint32_t len, bool write) +{ + uint16_t flags; + + g_assert_cmpint(indirect->index, <, indirect->elem); + + flags = readw(indirect->desc + (16 * indirect->index) + 12); + + if (write) { + flags |= QVRING_DESC_F_WRITE; + } + + /* indirect->desc[indirect->index].addr */ + writeq(indirect->desc + (16 * indirect->index), data); + /* indirect->desc[indirect->index].len */ + writel(indirect->desc + (16 * indirect->index) + 8, len); + /* indirect->desc[indirect->index].flags */ + writew(indirect->desc + (16 * indirect->index) + 12, flags); + + indirect->index++; +} + +uint32_t qvirtqueue_add(QVirtQueue *vq, uint64_t data, uint32_t len, bool write, + bool next) +{ + uint16_t flags = 0; + vq->num_free--; + + if (write) { + flags |= QVRING_DESC_F_WRITE; + } + + if (next) { + flags |= QVRING_DESC_F_NEXT; + } + + /* vq->desc[vq->free_head].addr */ + writeq(vq->desc + (16 * vq->free_head), data); + /* vq->desc[vq->free_head].len */ + writel(vq->desc + (16 * vq->free_head) + 8, len); + /* vq->desc[vq->free_head].flags */ + writew(vq->desc + (16 * vq->free_head) + 12, flags); + + return vq->free_head++; /* Return and increase, in this order */ +} + +uint32_t qvirtqueue_add_indirect(QVirtQueue *vq, QVRingIndirectDesc *indirect) +{ + g_assert(vq->indirect); + g_assert_cmpint(vq->size, >=, indirect->elem); + g_assert_cmpint(indirect->index, ==, indirect->elem); + + vq->num_free--; + + /* vq->desc[vq->free_head].addr */ + writeq(vq->desc + (16 * vq->free_head), indirect->desc); + /* vq->desc[vq->free_head].len */ + writel(vq->desc + (16 * vq->free_head) + 8, + sizeof(QVRingDesc) * indirect->elem); + /* vq->desc[vq->free_head].flags */ + writew(vq->desc + (16 * vq->free_head) + 12, QVRING_DESC_F_INDIRECT); + + return vq->free_head++; /* Return and increase, in this order */ +} + +void qvirtqueue_kick(const QVirtioBus *bus, QVirtioDevice *d, QVirtQueue *vq, + uint32_t free_head) +{ + /* vq->avail->idx */ + uint16_t idx = readl(vq->avail + 2); + /* vq->used->flags */ + uint16_t flags; + /* vq->used->avail_event */ + uint16_t avail_event; + + /* vq->avail->ring[idx % vq->size] */ + writel(vq->avail + 4 + (2 * (idx % vq->size)), free_head); + /* vq->avail->idx */ + writel(vq->avail + 2, idx + 1); + + /* Must read after idx is updated */ + flags = readw(vq->avail); + avail_event = readw(vq->used + 4 + + (sizeof(struct QVRingUsedElem) * vq->size)); + + /* < 1 because we add elements to avail queue one by one */ + if ((flags & QVRING_USED_F_NO_NOTIFY) == 0 && + (!vq->event || (uint16_t)(idx-avail_event) < 1)) { + bus->virtqueue_kick(d, vq); + } +} + +void qvirtqueue_set_used_event(QVirtQueue *vq, uint16_t idx) +{ + g_assert(vq->event); + + /* vq->avail->used_event */ + writew(vq->avail + 4 + (2 * vq->size), idx); +} |
