--- /dev/null
+/*
+ * libqos virtio MMIO 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 <stdio.h>
+#include "libqtest.h"
+#include "libqos/virtio.h"
+#include "libqos/virtio-mmio.h"
+#include "libqos/malloc.h"
+#include "libqos/malloc-generic.h"
+
+static uint8_t qvirtio_mmio_config_readb(QVirtioDevice *d, uint64_t addr)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ return readb(dev->addr + addr);
+}
+
+static uint16_t qvirtio_mmio_config_readw(QVirtioDevice *d, uint64_t addr)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ return readw(dev->addr + addr);
+}
+
+static uint32_t qvirtio_mmio_config_readl(QVirtioDevice *d, uint64_t addr)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ return readl(dev->addr + addr);
+}
+
+static uint64_t qvirtio_mmio_config_readq(QVirtioDevice *d, uint64_t addr)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ return readq(dev->addr + addr);
+}
+
+static uint32_t qvirtio_mmio_get_features(QVirtioDevice *d)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ writel(dev->addr + QVIRTIO_MMIO_HOST_FEATURES_SEL, 0);
+ return readl(dev->addr + QVIRTIO_MMIO_HOST_FEATURES);
+}
+
+static void qvirtio_mmio_set_features(QVirtioDevice *d, uint32_t features)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ dev->features = features;
+ writel(dev->addr + QVIRTIO_MMIO_GUEST_FEATURES_SEL, 0);
+ writel(dev->addr + QVIRTIO_MMIO_GUEST_FEATURES, features);
+}
+
+static uint32_t qvirtio_mmio_get_guest_features(QVirtioDevice *d)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ return dev->features;
+}
+
+static uint8_t qvirtio_mmio_get_status(QVirtioDevice *d)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ return (uint8_t)readl(dev->addr + QVIRTIO_MMIO_DEVICE_STATUS);
+}
+
+static void qvirtio_mmio_set_status(QVirtioDevice *d, uint8_t status)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ writel(dev->addr + QVIRTIO_MMIO_DEVICE_STATUS, (uint32_t)status);
+}
+
+static bool qvirtio_mmio_get_queue_isr_status(QVirtioDevice *d, QVirtQueue *vq)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ uint32_t isr;
+
+ isr = readl(dev->addr + QVIRTIO_MMIO_INTERRUPT_STATUS) & 1;
+ if (isr != 0) {
+ writel(dev->addr + QVIRTIO_MMIO_INTERRUPT_ACK, 1);
+ return true;
+ }
+
+ return false;
+}
+
+static bool qvirtio_mmio_get_config_isr_status(QVirtioDevice *d)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ uint32_t isr;
+
+ isr = readl(dev->addr + QVIRTIO_MMIO_INTERRUPT_STATUS) & 2;
+ if (isr != 0) {
+ writel(dev->addr + QVIRTIO_MMIO_INTERRUPT_ACK, 2);
+ return true;
+ }
+
+ return false;
+}
+
+static void qvirtio_mmio_queue_select(QVirtioDevice *d, uint16_t index)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ writel(dev->addr + QVIRTIO_MMIO_QUEUE_SEL, (uint32_t)index);
+
+ g_assert_cmphex(readl(dev->addr + QVIRTIO_MMIO_QUEUE_PFN), ==, 0);
+}
+
+static uint16_t qvirtio_mmio_get_queue_size(QVirtioDevice *d)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ return (uint16_t)readl(dev->addr + QVIRTIO_MMIO_QUEUE_NUM_MAX);
+}
+
+static void qvirtio_mmio_set_queue_address(QVirtioDevice *d, uint32_t pfn)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ writel(dev->addr + QVIRTIO_MMIO_QUEUE_PFN, pfn);
+}
+
+static QVirtQueue *qvirtio_mmio_virtqueue_setup(QVirtioDevice *d,
+ QGuestAllocator *alloc, uint16_t index)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ QVirtQueue *vq;
+ uint64_t addr;
+
+ vq = g_malloc0(sizeof(*vq));
+ qvirtio_mmio_queue_select(d, index);
+ writel(dev->addr + QVIRTIO_MMIO_QUEUE_ALIGN, dev->page_size);
+
+ vq->index = index;
+ vq->size = qvirtio_mmio_get_queue_size(d);
+ vq->free_head = 0;
+ vq->num_free = vq->size;
+ vq->align = dev->page_size;
+ vq->indirect = (dev->features & QVIRTIO_F_RING_INDIRECT_DESC) != 0;
+ vq->event = (dev->features & QVIRTIO_F_RING_EVENT_IDX) != 0;
+
+ writel(dev->addr + QVIRTIO_MMIO_QUEUE_NUM, vq->size);
+
+ /* Check different than 0 */
+ g_assert_cmpint(vq->size, !=, 0);
+
+ /* Check power of 2 */
+ g_assert_cmpint(vq->size & (vq->size - 1), ==, 0);
+
+ addr = guest_alloc(alloc, qvring_size(vq->size, dev->page_size));
+ qvring_init(alloc, vq, addr);
+ qvirtio_mmio_set_queue_address(d, vq->desc / dev->page_size);
+
+ return vq;
+}
+
+static void qvirtio_mmio_virtqueue_kick(QVirtioDevice *d, QVirtQueue *vq)
+{
+ QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
+ writel(dev->addr + QVIRTIO_MMIO_QUEUE_NOTIFY, vq->index);
+}
+
+const QVirtioBus qvirtio_mmio = {
+ .config_readb = qvirtio_mmio_config_readb,
+ .config_readw = qvirtio_mmio_config_readw,
+ .config_readl = qvirtio_mmio_config_readl,
+ .config_readq = qvirtio_mmio_config_readq,
+ .get_features = qvirtio_mmio_get_features,
+ .set_features = qvirtio_mmio_set_features,
+ .get_guest_features = qvirtio_mmio_get_guest_features,
+ .get_status = qvirtio_mmio_get_status,
+ .set_status = qvirtio_mmio_set_status,
+ .get_queue_isr_status = qvirtio_mmio_get_queue_isr_status,
+ .get_config_isr_status = qvirtio_mmio_get_config_isr_status,
+ .queue_select = qvirtio_mmio_queue_select,
+ .get_queue_size = qvirtio_mmio_get_queue_size,
+ .set_queue_address = qvirtio_mmio_set_queue_address,
+ .virtqueue_setup = qvirtio_mmio_virtqueue_setup,
+ .virtqueue_kick = qvirtio_mmio_virtqueue_kick,
+};
+
+QVirtioMMIODevice *qvirtio_mmio_init_device(uint64_t addr, uint32_t page_size)
+{
+ QVirtioMMIODevice *dev;
+ uint32_t magic;
+ dev = g_malloc0(sizeof(*dev));
+
+ magic = readl(addr + QVIRTIO_MMIO_MAGIC_VALUE);
+ g_assert(magic == ('v' | 'i' << 8 | 'r' << 16 | 't' << 24));
+
+ dev->addr = addr;
+ dev->page_size = page_size;
+ dev->vdev.device_type = readl(addr + QVIRTIO_MMIO_DEVICE_ID);
+
+ writel(addr + QVIRTIO_MMIO_GUEST_PAGE_SIZE, page_size);
+
+ return dev;
+}
Code Review / kvmfornfv.git / blobdiff