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-rw-r--r--hw/s390x/s390-virtio-bus.c623
1 files changed, 623 insertions, 0 deletions
diff --git a/hw/s390x/s390-virtio-bus.c b/hw/s390x/s390-virtio-bus.c
new file mode 100644
index 0000000000..32f63b07ea
--- /dev/null
+++ b/hw/s390x/s390-virtio-bus.c
@@ -0,0 +1,623 @@
+/*
+ * QEMU S390 virtio target
+ *
+ * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "hw/hw.h"
+#include "block/block.h"
+#include "sysemu/sysemu.h"
+#include "hw/boards.h"
+#include "monitor/monitor.h"
+#include "hw/loader.h"
+#include "elf.h"
+#include "hw/virtio.h"
+#include "hw/virtio-rng.h"
+#include "hw/virtio-serial.h"
+#include "hw/virtio-net.h"
+#include "hw/sysbus.h"
+#include "sysemu/kvm.h"
+
+#include "hw/s390x/s390-virtio-bus.h"
+#include "hw/virtio-bus.h"
+
+/* #define DEBUG_S390 */
+
+#ifdef DEBUG_S390
+#define dprintf(fmt, ...) \
+ do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
+#else
+#define dprintf(fmt, ...) \
+ do { } while (0)
+#endif
+
+#define VIRTIO_EXT_CODE 0x2603
+
+static const TypeInfo s390_virtio_bus_info = {
+ .name = TYPE_S390_VIRTIO_BUS,
+ .parent = TYPE_BUS,
+ .instance_size = sizeof(VirtIOS390Bus),
+};
+
+static const VirtIOBindings virtio_s390_bindings;
+
+static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev);
+
+/* length of VirtIO device pages */
+const hwaddr virtio_size = S390_DEVICE_PAGES * TARGET_PAGE_SIZE;
+
+static void s390_virtio_bus_reset(void *opaque)
+{
+ VirtIOS390Bus *bus = opaque;
+ bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE;
+}
+
+void s390_virtio_reset_idx(VirtIOS390Device *dev)
+{
+ int i;
+ hwaddr idx_addr;
+ uint8_t num_vq;
+
+ num_vq = s390_virtio_device_num_vq(dev);
+ for (i = 0; i < num_vq; i++) {
+ idx_addr = virtio_queue_get_avail_addr(dev->vdev, i) +
+ VIRTIO_VRING_AVAIL_IDX_OFFS;
+ stw_phys(idx_addr, 0);
+ idx_addr = virtio_queue_get_used_addr(dev->vdev, i) +
+ VIRTIO_VRING_USED_IDX_OFFS;
+ stw_phys(idx_addr, 0);
+ }
+}
+
+VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size)
+{
+ VirtIOS390Bus *bus;
+ BusState *_bus;
+ DeviceState *dev;
+
+ /* Create bridge device */
+ dev = qdev_create(NULL, "s390-virtio-bridge");
+ qdev_init_nofail(dev);
+
+ /* Create bus on bridge device */
+
+ _bus = qbus_create(TYPE_S390_VIRTIO_BUS, dev, "s390-virtio");
+ bus = DO_UPCAST(VirtIOS390Bus, bus, _bus);
+
+ bus->dev_page = *ram_size;
+ bus->dev_offs = bus->dev_page;
+ bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE;
+
+ /* Enable hotplugging */
+ _bus->allow_hotplug = 1;
+
+ /* Allocate RAM for VirtIO device pages (descriptors, queues, rings) */
+ *ram_size += S390_DEVICE_PAGES * TARGET_PAGE_SIZE;
+
+ qemu_register_reset(s390_virtio_bus_reset, bus);
+ return bus;
+}
+
+static void s390_virtio_irq(S390CPU *cpu, int config_change, uint64_t token)
+{
+ CPUS390XState *env = &cpu->env;
+
+ if (kvm_enabled()) {
+ kvm_s390_virtio_irq(cpu, config_change, token);
+ } else {
+ cpu_inject_ext(env, VIRTIO_EXT_CODE, config_change, token);
+ }
+}
+
+static int s390_virtio_device_init(VirtIOS390Device *dev, VirtIODevice *vdev)
+{
+ VirtIOS390Bus *bus;
+ int dev_len;
+
+ bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
+ dev->vdev = vdev;
+ dev->dev_offs = bus->dev_offs;
+ dev->feat_len = sizeof(uint32_t); /* always keep 32 bits features */
+
+ dev_len = VIRTIO_DEV_OFFS_CONFIG;
+ dev_len += s390_virtio_device_num_vq(dev) * VIRTIO_VQCONFIG_LEN;
+ dev_len += dev->feat_len * 2;
+ dev_len += vdev->config_len;
+
+ bus->dev_offs += dev_len;
+
+ virtio_bind_device(vdev, &virtio_s390_bindings, DEVICE(dev));
+ dev->host_features = vdev->get_features(vdev, dev->host_features);
+ s390_virtio_device_sync(dev);
+ s390_virtio_reset_idx(dev);
+ if (dev->qdev.hotplugged) {
+ S390CPU *cpu = s390_cpu_addr2state(0);
+ s390_virtio_irq(cpu, VIRTIO_PARAM_DEV_ADD, dev->dev_offs);
+ }
+
+ return 0;
+}
+
+static int s390_virtio_net_init(VirtIOS390Device *dev)
+{
+ VirtIODevice *vdev;
+
+ vdev = virtio_net_init((DeviceState *)dev, &dev->nic, &dev->net);
+ if (!vdev) {
+ return -1;
+ }
+
+ return s390_virtio_device_init(dev, vdev);
+}
+
+static int s390_virtio_blk_init(VirtIOS390Device *dev)
+{
+ VirtIODevice *vdev;
+
+ vdev = virtio_blk_init((DeviceState *)dev, &dev->blk);
+ if (!vdev) {
+ return -1;
+ }
+
+ return s390_virtio_device_init(dev, vdev);
+}
+
+static int s390_virtio_serial_init(VirtIOS390Device *dev)
+{
+ VirtIOS390Bus *bus;
+ VirtIODevice *vdev;
+ int r;
+
+ bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
+
+ vdev = virtio_serial_init((DeviceState *)dev, &dev->serial);
+ if (!vdev) {
+ return -1;
+ }
+
+ r = s390_virtio_device_init(dev, vdev);
+ if (!r) {
+ bus->console = dev;
+ }
+
+ return r;
+}
+
+static int s390_virtio_scsi_init(VirtIOS390Device *dev)
+{
+ VirtIODevice *vdev;
+
+ vdev = virtio_scsi_init((DeviceState *)dev, &dev->scsi);
+ if (!vdev) {
+ return -1;
+ }
+
+ return s390_virtio_device_init(dev, vdev);
+}
+
+static int s390_virtio_rng_init(VirtIOS390Device *dev)
+{
+ VirtIODevice *vdev;
+
+ vdev = virtio_rng_init((DeviceState *)dev, &dev->rng);
+ if (!vdev) {
+ return -1;
+ }
+
+ return s390_virtio_device_init(dev, vdev);
+}
+
+static uint64_t s390_virtio_device_vq_token(VirtIOS390Device *dev, int vq)
+{
+ ram_addr_t token_off;
+
+ token_off = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) +
+ (vq * VIRTIO_VQCONFIG_LEN) +
+ VIRTIO_VQCONFIG_OFFS_TOKEN;
+
+ return ldq_be_phys(token_off);
+}
+
+static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev)
+{
+ VirtIODevice *vdev = dev->vdev;
+ int num_vq;
+
+ for (num_vq = 0; num_vq < VIRTIO_PCI_QUEUE_MAX; num_vq++) {
+ if (!virtio_queue_get_num(vdev, num_vq)) {
+ break;
+ }
+ }
+
+ return num_vq;
+}
+
+static ram_addr_t s390_virtio_next_ring(VirtIOS390Bus *bus)
+{
+ ram_addr_t r = bus->next_ring;
+
+ bus->next_ring += VIRTIO_RING_LEN;
+ return r;
+}
+
+void s390_virtio_device_sync(VirtIOS390Device *dev)
+{
+ VirtIOS390Bus *bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
+ ram_addr_t cur_offs;
+ uint8_t num_vq;
+ int i;
+
+ virtio_reset(dev->vdev);
+
+ /* Sync dev space */
+ stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_TYPE, dev->vdev->device_id);
+
+ stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, s390_virtio_device_num_vq(dev));
+ stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_FEATURE_LEN, dev->feat_len);
+
+ stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG_LEN, dev->vdev->config_len);
+
+ num_vq = s390_virtio_device_num_vq(dev);
+ stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, num_vq);
+
+ /* Sync virtqueues */
+ for (i = 0; i < num_vq; i++) {
+ ram_addr_t vq = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) +
+ (i * VIRTIO_VQCONFIG_LEN);
+ ram_addr_t vring;
+
+ vring = s390_virtio_next_ring(bus);
+ virtio_queue_set_addr(dev->vdev, i, vring);
+ virtio_queue_set_vector(dev->vdev, i, i);
+ stq_be_phys(vq + VIRTIO_VQCONFIG_OFFS_ADDRESS, vring);
+ stw_be_phys(vq + VIRTIO_VQCONFIG_OFFS_NUM, virtio_queue_get_num(dev->vdev, i));
+ }
+
+ cur_offs = dev->dev_offs;
+ cur_offs += VIRTIO_DEV_OFFS_CONFIG;
+ cur_offs += num_vq * VIRTIO_VQCONFIG_LEN;
+
+ /* Sync feature bitmap */
+ stl_le_phys(cur_offs, dev->host_features);
+
+ dev->feat_offs = cur_offs + dev->feat_len;
+ cur_offs += dev->feat_len * 2;
+
+ /* Sync config space */
+ if (dev->vdev->get_config) {
+ dev->vdev->get_config(dev->vdev, dev->vdev->config);
+ }
+
+ cpu_physical_memory_write(cur_offs,
+ dev->vdev->config, dev->vdev->config_len);
+ cur_offs += dev->vdev->config_len;
+}
+
+void s390_virtio_device_update_status(VirtIOS390Device *dev)
+{
+ VirtIODevice *vdev = dev->vdev;
+ uint32_t features;
+
+ virtio_set_status(vdev, ldub_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS));
+
+ /* Update guest supported feature bitmap */
+
+ features = bswap32(ldl_be_phys(dev->feat_offs));
+ virtio_set_features(vdev, features);
+}
+
+VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus)
+{
+ return bus->console;
+}
+
+/* Find a device by vring address */
+VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus,
+ ram_addr_t mem,
+ int *vq_num)
+{
+ BusChild *kid;
+ int i;
+
+ QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
+ VirtIOS390Device *dev = (VirtIOS390Device *)kid->child;
+
+ for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
+ if (!virtio_queue_get_addr(dev->vdev, i))
+ break;
+ if (virtio_queue_get_addr(dev->vdev, i) == mem) {
+ if (vq_num) {
+ *vq_num = i;
+ }
+ return dev;
+ }
+ }
+ }
+
+ return NULL;
+}
+
+/* Find a device by device descriptor location */
+VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus, ram_addr_t mem)
+{
+ BusChild *kid;
+
+ QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
+ VirtIOS390Device *dev = (VirtIOS390Device *)kid->child;
+ if (dev->dev_offs == mem) {
+ return dev;
+ }
+ }
+
+ return NULL;
+}
+
+/* DeviceState to VirtIOS390Device. Note: used on datapath,
+ * be careful and test performance if you change this.
+ */
+static inline VirtIOS390Device *to_virtio_s390_device_fast(DeviceState *d)
+{
+ return container_of(d, VirtIOS390Device, qdev);
+}
+
+/* DeviceState to VirtIOS390Device. TODO: use QOM. */
+static inline VirtIOS390Device *to_virtio_s390_device(DeviceState *d)
+{
+ return container_of(d, VirtIOS390Device, qdev);
+}
+
+static void virtio_s390_notify(DeviceState *d, uint16_t vector)
+{
+ VirtIOS390Device *dev = to_virtio_s390_device_fast(d);
+ uint64_t token = s390_virtio_device_vq_token(dev, vector);
+ S390CPU *cpu = s390_cpu_addr2state(0);
+
+ s390_virtio_irq(cpu, 0, token);
+}
+
+static unsigned virtio_s390_get_features(DeviceState *d)
+{
+ VirtIOS390Device *dev = to_virtio_s390_device(d);
+ return dev->host_features;
+}
+
+/**************** S390 Virtio Bus Device Descriptions *******************/
+
+static const VirtIOBindings virtio_s390_bindings = {
+ .notify = virtio_s390_notify,
+ .get_features = virtio_s390_get_features,
+};
+
+static Property s390_virtio_net_properties[] = {
+ DEFINE_NIC_PROPERTIES(VirtIOS390Device, nic),
+ DEFINE_PROP_UINT32("x-txtimer", VirtIOS390Device,
+ net.txtimer, TX_TIMER_INTERVAL),
+ DEFINE_PROP_INT32("x-txburst", VirtIOS390Device,
+ net.txburst, TX_BURST),
+ DEFINE_PROP_STRING("tx", VirtIOS390Device, net.tx),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void s390_virtio_net_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
+
+ k->init = s390_virtio_net_init;
+ dc->props = s390_virtio_net_properties;
+}
+
+static const TypeInfo s390_virtio_net = {
+ .name = "virtio-net-s390",
+ .parent = TYPE_VIRTIO_S390_DEVICE,
+ .instance_size = sizeof(VirtIOS390Device),
+ .class_init = s390_virtio_net_class_init,
+};
+
+static Property s390_virtio_blk_properties[] = {
+ DEFINE_BLOCK_PROPERTIES(VirtIOS390Device, blk.conf),
+ DEFINE_BLOCK_CHS_PROPERTIES(VirtIOS390Device, blk.conf),
+ DEFINE_PROP_STRING("serial", VirtIOS390Device, blk.serial),
+#ifdef __linux__
+ DEFINE_PROP_BIT("scsi", VirtIOS390Device, blk.scsi, 0, true),
+#endif
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void s390_virtio_blk_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
+
+ k->init = s390_virtio_blk_init;
+ dc->props = s390_virtio_blk_properties;
+}
+
+static const TypeInfo s390_virtio_blk = {
+ .name = "virtio-blk-s390",
+ .parent = TYPE_VIRTIO_S390_DEVICE,
+ .instance_size = sizeof(VirtIOS390Device),
+ .class_init = s390_virtio_blk_class_init,
+};
+
+static Property s390_virtio_serial_properties[] = {
+ DEFINE_PROP_UINT32("max_ports", VirtIOS390Device,
+ serial.max_virtserial_ports, 31),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void s390_virtio_serial_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
+
+ k->init = s390_virtio_serial_init;
+ dc->props = s390_virtio_serial_properties;
+}
+
+static const TypeInfo s390_virtio_serial = {
+ .name = "virtio-serial-s390",
+ .parent = TYPE_VIRTIO_S390_DEVICE,
+ .instance_size = sizeof(VirtIOS390Device),
+ .class_init = s390_virtio_serial_class_init,
+};
+
+static void s390_virtio_rng_initfn(Object *obj)
+{
+ VirtIOS390Device *dev = VIRTIO_S390_DEVICE(obj);
+
+ object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
+ (Object **)&dev->rng.rng, NULL);
+}
+
+static void s390_virtio_rng_class_init(ObjectClass *klass, void *data)
+{
+ VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
+
+ k->init = s390_virtio_rng_init;
+}
+
+static const TypeInfo s390_virtio_rng = {
+ .name = "virtio-rng-s390",
+ .parent = TYPE_VIRTIO_S390_DEVICE,
+ .instance_size = sizeof(VirtIOS390Device),
+ .instance_init = s390_virtio_rng_initfn,
+ .class_init = s390_virtio_rng_class_init,
+};
+
+static int s390_virtio_busdev_init(DeviceState *dev)
+{
+ VirtIOS390Device *_dev = (VirtIOS390Device *)dev;
+ VirtIOS390DeviceClass *_info = VIRTIO_S390_DEVICE_GET_CLASS(dev);
+
+ virtio_s390_bus_new(&_dev->bus, _dev);
+
+ return _info->init(_dev);
+}
+
+static void s390_virtio_busdev_reset(DeviceState *dev)
+{
+ VirtIOS390Device *_dev = (VirtIOS390Device *)dev;
+
+ virtio_reset(_dev->vdev);
+}
+
+static void virtio_s390_device_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->init = s390_virtio_busdev_init;
+ dc->bus_type = TYPE_S390_VIRTIO_BUS;
+ dc->unplug = qdev_simple_unplug_cb;
+ dc->reset = s390_virtio_busdev_reset;
+}
+
+static const TypeInfo virtio_s390_device_info = {
+ .name = TYPE_VIRTIO_S390_DEVICE,
+ .parent = TYPE_DEVICE,
+ .instance_size = sizeof(VirtIOS390Device),
+ .class_init = virtio_s390_device_class_init,
+ .class_size = sizeof(VirtIOS390DeviceClass),
+ .abstract = true,
+};
+
+static Property s390_virtio_scsi_properties[] = {
+ DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOS390Device, host_features, scsi),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void s390_virtio_scsi_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
+
+ k->init = s390_virtio_scsi_init;
+ dc->props = s390_virtio_scsi_properties;
+}
+
+static const TypeInfo s390_virtio_scsi = {
+ .name = "virtio-scsi-s390",
+ .parent = TYPE_VIRTIO_S390_DEVICE,
+ .instance_size = sizeof(VirtIOS390Device),
+ .class_init = s390_virtio_scsi_class_init,
+};
+
+/***************** S390 Virtio Bus Bridge Device *******************/
+/* Only required to have the virtio bus as child in the system bus */
+
+static int s390_virtio_bridge_init(SysBusDevice *dev)
+{
+ /* nothing */
+ return 0;
+}
+
+static void s390_virtio_bridge_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+ k->init = s390_virtio_bridge_init;
+ dc->no_user = 1;
+}
+
+static const TypeInfo s390_virtio_bridge_info = {
+ .name = "s390-virtio-bridge",
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(SysBusDevice),
+ .class_init = s390_virtio_bridge_class_init,
+};
+
+/* virtio-s390-bus */
+
+void virtio_s390_bus_new(VirtioBusState *bus, VirtIOS390Device *dev)
+{
+ DeviceState *qdev = DEVICE(dev);
+ BusState *qbus;
+ qbus_create_inplace((BusState *)bus, TYPE_VIRTIO_S390_BUS, qdev, NULL);
+ qbus = BUS(bus);
+ qbus->allow_hotplug = 0;
+}
+
+static void virtio_s390_bus_class_init(ObjectClass *klass, void *data)
+{
+ VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
+ BusClass *bus_class = BUS_CLASS(klass);
+ bus_class->max_dev = 1;
+ k->notify = virtio_s390_notify;
+ k->get_features = virtio_s390_get_features;
+}
+
+static const TypeInfo virtio_s390_bus_info = {
+ .name = TYPE_VIRTIO_S390_BUS,
+ .parent = TYPE_VIRTIO_BUS,
+ .instance_size = sizeof(VirtioS390BusState),
+ .class_init = virtio_s390_bus_class_init,
+};
+
+static void s390_virtio_register_types(void)
+{
+ type_register_static(&virtio_s390_bus_info);
+ type_register_static(&s390_virtio_bus_info);
+ type_register_static(&virtio_s390_device_info);
+ type_register_static(&s390_virtio_serial);
+ type_register_static(&s390_virtio_blk);
+ type_register_static(&s390_virtio_net);
+ type_register_static(&s390_virtio_scsi);
+ type_register_static(&s390_virtio_rng);
+ type_register_static(&s390_virtio_bridge_info);
+}
+
+type_init(s390_virtio_register_types)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 19:21:20 +0000