2014-09-01 12:07:55 +02:00
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/*
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* libqos virtio driver
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*
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* Copyright (c) 2014 Marc Marí
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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2016-02-08 19:08:51 +01:00
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#include "qemu/osdep.h"
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2014-09-01 12:07:55 +02:00
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#include "libqtest.h"
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#include "libqos/virtio.h"
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2016-05-09 14:47:36 +02:00
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#include "standard-headers/linux/virtio_config.h"
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2016-05-09 14:47:37 +02:00
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#include "standard-headers/linux/virtio_ring.h"
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2014-09-01 12:07:55 +02:00
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2016-10-17 12:30:21 +02:00
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uint8_t qvirtio_config_readb(QVirtioDevice *d, uint64_t addr)
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2014-09-01 12:07:55 +02:00
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{
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2016-10-17 12:30:21 +02:00
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return d->bus->config_readb(d, addr);
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2014-09-01 12:07:55 +02:00
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}
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2016-10-17 12:30:21 +02:00
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uint16_t qvirtio_config_readw(QVirtioDevice *d, uint64_t addr)
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2014-09-01 12:07:55 +02:00
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{
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2016-10-17 12:30:21 +02:00
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return d->bus->config_readw(d, addr);
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2014-09-01 12:07:55 +02:00
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}
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2016-10-17 12:30:21 +02:00
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uint32_t qvirtio_config_readl(QVirtioDevice *d, uint64_t addr)
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2014-09-01 12:07:55 +02:00
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{
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2016-10-17 12:30:21 +02:00
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return d->bus->config_readl(d, addr);
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2014-09-01 12:07:55 +02:00
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}
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2016-10-17 12:30:21 +02:00
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uint64_t qvirtio_config_readq(QVirtioDevice *d, uint64_t addr)
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2014-09-01 12:07:55 +02:00
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{
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2016-10-17 12:30:21 +02:00
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return d->bus->config_readq(d, addr);
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2014-09-01 12:07:55 +02:00
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}
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2016-10-17 12:30:21 +02:00
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uint32_t qvirtio_get_features(QVirtioDevice *d)
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2014-09-01 12:07:56 +02:00
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{
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2016-10-17 12:30:21 +02:00
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return d->bus->get_features(d);
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2014-09-01 12:07:56 +02:00
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}
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2016-10-17 12:30:21 +02:00
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void qvirtio_set_features(QVirtioDevice *d, uint32_t features)
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2014-09-01 12:07:56 +02:00
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{
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2018-07-30 22:21:42 +02:00
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d->features = features;
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2016-10-17 12:30:21 +02:00
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d->bus->set_features(d, features);
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2014-09-01 12:07:56 +02:00
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}
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2016-10-17 12:30:21 +02:00
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QVirtQueue *qvirtqueue_setup(QVirtioDevice *d,
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QGuestAllocator *alloc, uint16_t index)
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2014-09-01 12:07:56 +02:00
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{
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2016-10-17 12:30:21 +02:00
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return d->bus->virtqueue_setup(d, alloc, index);
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2014-09-01 12:07:56 +02:00
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}
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2016-05-05 17:53:35 +02:00
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void qvirtqueue_cleanup(const QVirtioBus *bus, QVirtQueue *vq,
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QGuestAllocator *alloc)
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{
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return bus->virtqueue_cleanup(vq, alloc);
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}
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2016-10-17 12:30:21 +02:00
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void qvirtio_reset(QVirtioDevice *d)
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2014-09-01 12:07:55 +02:00
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{
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2016-10-17 12:30:21 +02:00
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d->bus->set_status(d, 0);
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g_assert_cmphex(d->bus->get_status(d), ==, 0);
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2014-09-01 12:07:55 +02:00
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}
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2016-10-17 12:30:21 +02:00
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void qvirtio_set_acknowledge(QVirtioDevice *d)
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2014-09-01 12:07:55 +02:00
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{
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2016-10-17 12:30:21 +02:00
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d->bus->set_status(d, d->bus->get_status(d) | VIRTIO_CONFIG_S_ACKNOWLEDGE);
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g_assert_cmphex(d->bus->get_status(d), ==, VIRTIO_CONFIG_S_ACKNOWLEDGE);
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2014-09-01 12:07:55 +02:00
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}
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2016-10-17 12:30:21 +02:00
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void qvirtio_set_driver(QVirtioDevice *d)
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2014-09-01 12:07:55 +02:00
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{
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2016-10-17 12:30:21 +02:00
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d->bus->set_status(d, d->bus->get_status(d) | VIRTIO_CONFIG_S_DRIVER);
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g_assert_cmphex(d->bus->get_status(d), ==,
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2016-05-09 14:47:36 +02:00
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VIRTIO_CONFIG_S_DRIVER | VIRTIO_CONFIG_S_ACKNOWLEDGE);
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2014-09-01 12:07:55 +02:00
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}
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2014-09-01 12:07:56 +02:00
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2016-10-17 12:30:21 +02:00
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void qvirtio_set_driver_ok(QVirtioDevice *d)
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2014-09-01 12:07:56 +02:00
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{
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2016-10-17 12:30:21 +02:00
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d->bus->set_status(d, d->bus->get_status(d) | VIRTIO_CONFIG_S_DRIVER_OK);
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g_assert_cmphex(d->bus->get_status(d), ==, VIRTIO_CONFIG_S_DRIVER_OK |
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2016-05-09 14:47:36 +02:00
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VIRTIO_CONFIG_S_DRIVER | VIRTIO_CONFIG_S_ACKNOWLEDGE);
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2014-09-01 12:07:56 +02:00
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}
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2016-10-17 12:30:21 +02:00
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void qvirtio_wait_queue_isr(QVirtioDevice *d,
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2014-09-29 17:40:12 +02:00
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QVirtQueue *vq, gint64 timeout_us)
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2014-09-01 12:07:59 +02:00
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{
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2014-09-29 17:40:12 +02:00
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gint64 start_time = g_get_monotonic_time();
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for (;;) {
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2014-09-11 11:40:16 +02:00
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clock_step(100);
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2016-10-17 12:30:21 +02:00
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if (d->bus->get_queue_isr_status(d, vq)) {
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2014-09-29 17:40:12 +02:00
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return;
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2014-09-01 12:07:59 +02:00
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}
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2014-09-29 17:40:12 +02:00
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g_assert(g_get_monotonic_time() - start_time <= timeout_us);
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}
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2014-09-01 12:07:59 +02:00
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}
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2014-09-29 17:40:11 +02:00
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/* Wait for the status byte at given guest memory address to be set
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*
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* The virtqueue interrupt must not be raised, making this useful for testing
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* event_index functionality.
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*/
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2016-10-17 12:30:21 +02:00
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uint8_t qvirtio_wait_status_byte_no_isr(QVirtioDevice *d,
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2014-09-29 17:40:11 +02:00
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QVirtQueue *vq,
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uint64_t addr,
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gint64 timeout_us)
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{
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gint64 start_time = g_get_monotonic_time();
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uint8_t val;
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while ((val = readb(addr)) == 0xff) {
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clock_step(100);
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2016-10-17 12:30:21 +02:00
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g_assert(!d->bus->get_queue_isr_status(d, vq));
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2014-09-29 17:40:11 +02:00
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g_assert(g_get_monotonic_time() - start_time <= timeout_us);
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}
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return val;
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}
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2017-06-28 20:47:20 +02:00
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/*
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* qvirtio_wait_used_elem:
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* @desc_idx: The next expected vq->desc[] index in the used ring
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2018-02-01 21:21:28 +01:00
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* @len: A pointer that is filled with the length written into the buffer, may
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* be NULL
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2017-06-28 20:47:20 +02:00
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* @timeout_us: How many microseconds to wait before failing
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*
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* This function waits for the next completed request on the used ring.
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*/
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void qvirtio_wait_used_elem(QVirtioDevice *d,
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QVirtQueue *vq,
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uint32_t desc_idx,
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2018-02-01 21:21:28 +01:00
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uint32_t *len,
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2017-06-28 20:47:20 +02:00
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gint64 timeout_us)
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{
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gint64 start_time = g_get_monotonic_time();
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for (;;) {
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uint32_t got_desc_idx;
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clock_step(100);
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if (d->bus->get_queue_isr_status(d, vq) &&
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2018-02-01 21:21:28 +01:00
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qvirtqueue_get_buf(vq, &got_desc_idx, len)) {
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2017-06-28 20:47:20 +02:00
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g_assert_cmpint(got_desc_idx, ==, desc_idx);
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return;
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}
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g_assert(g_get_monotonic_time() - start_time <= timeout_us);
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}
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}
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2016-10-17 12:30:21 +02:00
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void qvirtio_wait_config_isr(QVirtioDevice *d, gint64 timeout_us)
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2014-09-01 12:07:56 +02:00
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{
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2014-09-29 17:40:12 +02:00
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gint64 start_time = g_get_monotonic_time();
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for (;;) {
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2014-09-11 11:40:16 +02:00
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clock_step(100);
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2016-10-17 12:30:21 +02:00
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if (d->bus->get_config_isr_status(d)) {
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2014-09-29 17:40:12 +02:00
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return;
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2014-09-01 12:07:56 +02:00
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}
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2014-09-29 17:40:12 +02:00
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g_assert(g_get_monotonic_time() - start_time <= timeout_us);
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}
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2014-09-01 12:07:56 +02:00
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}
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2019-05-15 19:43:23 +02:00
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void qvring_init(QTestState *qts, const QGuestAllocator *alloc, QVirtQueue *vq,
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uint64_t addr)
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2014-09-01 12:07:56 +02:00
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{
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int i;
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vq->desc = addr;
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2016-05-09 14:47:38 +02:00
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vq->avail = vq->desc + vq->size * sizeof(struct vring_desc);
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2014-09-01 12:07:56 +02:00
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vq->used = (uint64_t)((vq->avail + sizeof(uint16_t) * (3 + vq->size)
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+ vq->align - 1) & ~(vq->align - 1));
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for (i = 0; i < vq->size - 1; i++) {
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/* vq->desc[i].addr */
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2019-05-15 19:43:23 +02:00
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qtest_writeq(qts, vq->desc + (16 * i), 0);
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2014-09-01 12:07:56 +02:00
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/* vq->desc[i].next */
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2019-05-15 19:43:23 +02:00
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qtest_writew(qts, vq->desc + (16 * i) + 14, i + 1);
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2014-09-01 12:07:56 +02:00
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}
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/* vq->avail->flags */
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2019-05-15 19:43:23 +02:00
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qtest_writew(qts, vq->avail, 0);
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2014-09-01 12:07:56 +02:00
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/* vq->avail->idx */
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2019-05-15 19:43:23 +02:00
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qtest_writew(qts, vq->avail + 2, 0);
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2014-09-01 12:08:00 +02:00
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/* vq->avail->used_event */
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2019-05-15 19:43:23 +02:00
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qtest_writew(qts, vq->avail + 4 + (2 * vq->size), 0);
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2014-09-01 12:07:56 +02:00
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/* vq->used->flags */
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2019-05-15 19:43:23 +02:00
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qtest_writew(qts, vq->used, 0);
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2014-09-01 12:08:00 +02:00
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/* vq->used->avail_event */
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2019-05-15 19:43:23 +02:00
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qtest_writew(qts, vq->used + 2 + sizeof(struct vring_used_elem) * vq->size,
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0);
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2014-09-01 12:07:56 +02:00
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}
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2014-09-01 12:07:57 +02:00
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QVRingIndirectDesc *qvring_indirect_desc_setup(QVirtioDevice *d,
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QGuestAllocator *alloc, uint16_t elem)
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{
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int i;
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QVRingIndirectDesc *indirect = g_malloc(sizeof(*indirect));
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indirect->index = 0;
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indirect->elem = elem;
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2016-05-09 14:47:38 +02:00
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indirect->desc = guest_alloc(alloc, sizeof(struct vring_desc) * elem);
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2014-09-01 12:07:57 +02:00
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for (i = 0; i < elem - 1; ++i) {
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/* indirect->desc[i].addr */
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writeq(indirect->desc + (16 * i), 0);
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/* indirect->desc[i].flags */
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2016-05-09 14:47:37 +02:00
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writew(indirect->desc + (16 * i) + 12, VRING_DESC_F_NEXT);
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2014-09-01 12:07:57 +02:00
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/* indirect->desc[i].next */
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writew(indirect->desc + (16 * i) + 14, i + 1);
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}
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return indirect;
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}
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void qvring_indirect_desc_add(QVRingIndirectDesc *indirect, uint64_t data,
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uint32_t len, bool write)
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{
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uint16_t flags;
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g_assert_cmpint(indirect->index, <, indirect->elem);
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flags = readw(indirect->desc + (16 * indirect->index) + 12);
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if (write) {
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2016-05-09 14:47:37 +02:00
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flags |= VRING_DESC_F_WRITE;
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2014-09-01 12:07:57 +02:00
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}
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/* indirect->desc[indirect->index].addr */
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writeq(indirect->desc + (16 * indirect->index), data);
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/* indirect->desc[indirect->index].len */
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writel(indirect->desc + (16 * indirect->index) + 8, len);
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/* indirect->desc[indirect->index].flags */
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writew(indirect->desc + (16 * indirect->index) + 12, flags);
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indirect->index++;
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}
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2014-09-01 12:07:56 +02:00
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uint32_t qvirtqueue_add(QVirtQueue *vq, uint64_t data, uint32_t len, bool write,
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bool next)
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{
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uint16_t flags = 0;
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vq->num_free--;
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if (write) {
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2016-05-09 14:47:37 +02:00
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flags |= VRING_DESC_F_WRITE;
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2014-09-01 12:07:56 +02:00
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}
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if (next) {
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2016-05-09 14:47:37 +02:00
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flags |= VRING_DESC_F_NEXT;
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2014-09-01 12:07:56 +02:00
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}
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/* vq->desc[vq->free_head].addr */
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writeq(vq->desc + (16 * vq->free_head), data);
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/* vq->desc[vq->free_head].len */
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writel(vq->desc + (16 * vq->free_head) + 8, len);
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/* vq->desc[vq->free_head].flags */
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writew(vq->desc + (16 * vq->free_head) + 12, flags);
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return vq->free_head++; /* Return and increase, in this order */
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}
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2014-09-01 12:07:57 +02:00
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uint32_t qvirtqueue_add_indirect(QVirtQueue *vq, QVRingIndirectDesc *indirect)
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{
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g_assert(vq->indirect);
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g_assert_cmpint(vq->size, >=, indirect->elem);
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g_assert_cmpint(indirect->index, ==, indirect->elem);
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vq->num_free--;
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/* vq->desc[vq->free_head].addr */
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writeq(vq->desc + (16 * vq->free_head), indirect->desc);
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|
|
/* vq->desc[vq->free_head].len */
|
|
|
|
writel(vq->desc + (16 * vq->free_head) + 8,
|
2016-05-09 14:47:38 +02:00
|
|
|
sizeof(struct vring_desc) * indirect->elem);
|
2014-09-01 12:07:57 +02:00
|
|
|
/* vq->desc[vq->free_head].flags */
|
2016-05-09 14:47:37 +02:00
|
|
|
writew(vq->desc + (16 * vq->free_head) + 12, VRING_DESC_F_INDIRECT);
|
2014-09-01 12:07:57 +02:00
|
|
|
|
|
|
|
return vq->free_head++; /* Return and increase, in this order */
|
|
|
|
}
|
|
|
|
|
2016-10-17 12:30:21 +02:00
|
|
|
void qvirtqueue_kick(QVirtioDevice *d, QVirtQueue *vq, uint32_t free_head)
|
2014-09-01 12:07:56 +02:00
|
|
|
{
|
|
|
|
/* vq->avail->idx */
|
2016-08-27 22:34:14 +02:00
|
|
|
uint16_t idx = readw(vq->avail + 2);
|
2014-09-01 12:08:00 +02:00
|
|
|
/* vq->used->flags */
|
|
|
|
uint16_t flags;
|
|
|
|
/* vq->used->avail_event */
|
|
|
|
uint16_t avail_event;
|
2014-09-01 12:07:56 +02:00
|
|
|
|
|
|
|
/* vq->avail->ring[idx % vq->size] */
|
2016-08-27 22:34:14 +02:00
|
|
|
writew(vq->avail + 4 + (2 * (idx % vq->size)), free_head);
|
2014-09-01 12:07:56 +02:00
|
|
|
/* vq->avail->idx */
|
2016-08-27 22:34:14 +02:00
|
|
|
writew(vq->avail + 2, idx + 1);
|
2014-09-01 12:07:56 +02:00
|
|
|
|
2014-09-01 12:08:00 +02:00
|
|
|
/* Must read after idx is updated */
|
|
|
|
flags = readw(vq->avail);
|
|
|
|
avail_event = readw(vq->used + 4 +
|
2016-05-09 14:47:38 +02:00
|
|
|
sizeof(struct vring_used_elem) * vq->size);
|
2014-09-01 12:08:00 +02:00
|
|
|
|
|
|
|
/* < 1 because we add elements to avail queue one by one */
|
2016-05-09 14:47:37 +02:00
|
|
|
if ((flags & VRING_USED_F_NO_NOTIFY) == 0 &&
|
2014-09-01 12:08:00 +02:00
|
|
|
(!vq->event || (uint16_t)(idx-avail_event) < 1)) {
|
2016-10-17 12:30:21 +02:00
|
|
|
d->bus->virtqueue_kick(d, vq);
|
2014-09-01 12:08:00 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-06-28 20:47:20 +02:00
|
|
|
/*
|
|
|
|
* qvirtqueue_get_buf:
|
|
|
|
* @desc_idx: A pointer that is filled with the vq->desc[] index, may be NULL
|
2018-02-01 21:21:28 +01:00
|
|
|
* @len: A pointer that is filled with the length written into the buffer, may
|
|
|
|
* be NULL
|
2017-06-28 20:47:20 +02:00
|
|
|
*
|
|
|
|
* This function gets the next used element if there is one ready.
|
|
|
|
*
|
|
|
|
* Returns: true if an element was ready, false otherwise
|
|
|
|
*/
|
2018-02-01 21:21:28 +01:00
|
|
|
bool qvirtqueue_get_buf(QVirtQueue *vq, uint32_t *desc_idx, uint32_t *len)
|
2017-06-28 20:47:20 +02:00
|
|
|
{
|
|
|
|
uint16_t idx;
|
2018-02-01 21:21:28 +01:00
|
|
|
uint64_t elem_addr;
|
2017-06-28 20:47:20 +02:00
|
|
|
|
|
|
|
idx = readw(vq->used + offsetof(struct vring_used, idx));
|
|
|
|
if (idx == vq->last_used_idx) {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
2018-02-01 21:21:28 +01:00
|
|
|
elem_addr = vq->used +
|
|
|
|
offsetof(struct vring_used, ring) +
|
|
|
|
(vq->last_used_idx % vq->size) *
|
|
|
|
sizeof(struct vring_used_elem);
|
2017-06-28 20:47:20 +02:00
|
|
|
|
2018-02-01 21:21:28 +01:00
|
|
|
if (desc_idx) {
|
2017-06-28 20:47:20 +02:00
|
|
|
*desc_idx = readl(elem_addr + offsetof(struct vring_used_elem, id));
|
|
|
|
}
|
|
|
|
|
2018-02-01 21:21:28 +01:00
|
|
|
if (len) {
|
|
|
|
*len = readw(elem_addr + offsetof(struct vring_used_elem, len));
|
|
|
|
}
|
|
|
|
|
2017-06-28 20:47:20 +02:00
|
|
|
vq->last_used_idx++;
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
2014-09-01 12:08:00 +02:00
|
|
|
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);
|
2014-09-01 12:07:56 +02:00
|
|
|
}
|
2017-08-31 16:40:08 +02:00
|
|
|
|
2018-07-25 16:25:43 +02:00
|
|
|
void qvirtio_start_device(QVirtioDevice *vdev)
|
|
|
|
{
|
|
|
|
qvirtio_reset(vdev);
|
|
|
|
qvirtio_set_acknowledge(vdev);
|
|
|
|
qvirtio_set_driver(vdev);
|
|
|
|
}
|
2018-10-07 09:37:44 +02:00
|
|
|
|
|
|
|
bool qvirtio_is_big_endian(QVirtioDevice *d)
|
|
|
|
{
|
|
|
|
return d->big_endian;
|
|
|
|
}
|