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-rw-r--r--hw/s390-virtio-bus.c395
-rw-r--r--hw/s390-virtio-bus.h64
2 files changed, 459 insertions, 0 deletions
diff --git a/hw/s390-virtio-bus.c b/hw/s390-virtio-bus.c
new file mode 100644
index 0000000000..493e4dae44
--- /dev/null
+++ b/hw/s390-virtio-bus.c
@@ -0,0 +1,395 @@
+/*
+ * 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.h"
+#include "block.h"
+#include "sysemu.h"
+#include "net.h"
+#include "boards.h"
+#include "monitor.h"
+#include "loader.h"
+#include "elf.h"
+#include "hw/virtio.h"
+#include "hw/virtio-console.h"
+#include "hw/sysbus.h"
+#include "kvm.h"
+
+#include "hw/s390-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
+
+struct BusInfo s390_virtio_bus_info = {
+ .name = "s390-virtio",
+ .size = sizeof(VirtIOS390Bus),
+};
+
+typedef struct {
+ DeviceInfo qdev;
+ int (*init)(VirtIOS390Device *dev);
+} VirtIOS390DeviceInfo;
+
+
+static const VirtIOBindings virtio_s390_bindings;
+
+static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev);
+static void s390_virtio_device_sync(VirtIOS390Device *dev);
+
+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(&s390_virtio_bus_info, 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;
+
+ /* Allocate RAM for VirtIO device pages (descriptors, queues, rings) */
+ *ram_size += S390_DEVICE_PAGES * TARGET_PAGE_SIZE;
+
+ return bus;
+}
+
+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, dev);
+ s390_virtio_device_sync(dev);
+
+ return 0;
+}
+
+static int s390_virtio_net_init(VirtIOS390Device *dev)
+{
+ VirtIODevice *vdev;
+
+ vdev = virtio_net_init((DeviceState *)dev, &dev->nic);
+ 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->dinfo);
+ if (!vdev) {
+ return -1;
+ }
+
+ return s390_virtio_device_init(dev, vdev);
+}
+
+static int s390_virtio_console_init(VirtIOS390Device *dev)
+{
+ VirtIOS390Bus *bus;
+ VirtIODevice *vdev;
+ int r;
+
+ bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
+
+ vdev = virtio_console_init((DeviceState *)dev);
+ if (!vdev) {
+ return -1;
+ }
+
+ r = s390_virtio_device_init(dev, vdev);
+ if (!r) {
+ bus->console = dev;
+ }
+
+ return r;
+}
+
+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_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;
+}
+
+static 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_phys(vq + VIRTIO_VQCONFIG_OFFS_ADDRESS, vring);
+ stw_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 */
+ if (dev->vdev->get_features) {
+ stl_phys(cur_offs, dev->vdev->get_features(dev->vdev));
+ }
+
+ 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_rw(cur_offs, dev->vdev->config, dev->vdev->config_len, 1);
+ cur_offs += dev->vdev->config_len;
+}
+
+void s390_virtio_device_update_status(VirtIOS390Device *dev)
+{
+ VirtIODevice *vdev = dev->vdev;
+ uint32_t features;
+
+ vdev->status = ldub_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS);
+
+ /* Update guest supported feature bitmap */
+
+ features = ldl_phys(dev->feat_offs);
+ if (vdev->set_features) {
+ vdev->set_features(vdev, features);
+ }
+ vdev->features = 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)
+{
+ VirtIOS390Device *_dev;
+ DeviceState *dev;
+ int i;
+
+ QLIST_FOREACH(dev, &bus->bus.children, sibling) {
+ _dev = (VirtIOS390Device *)dev;
+ 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)
+{
+ VirtIOS390Device *_dev;
+ DeviceState *dev;
+
+ QLIST_FOREACH(dev, &bus->bus.children, sibling) {
+ _dev = (VirtIOS390Device *)dev;
+ if (_dev->dev_offs == mem) {
+ return _dev;
+ }
+ }
+
+ return NULL;
+}
+
+static void virtio_s390_notify(void *opaque, uint16_t vector)
+{
+ VirtIOS390Device *dev = (VirtIOS390Device*)opaque;
+ uint64_t token = s390_virtio_device_vq_token(dev, vector);
+
+ /* XXX kvm dependency! */
+ kvm_s390_virtio_irq(s390_cpu_addr2state(0), 1, token);
+}
+
+/**************** S390 Virtio Bus Device Descriptions *******************/
+
+static const VirtIOBindings virtio_s390_bindings = {
+ .notify = virtio_s390_notify,
+};
+
+static VirtIOS390DeviceInfo s390_virtio_net = {
+ .init = s390_virtio_net_init,
+ .qdev.name = "virtio-net-s390",
+ .qdev.size = sizeof(VirtIOS390Device),
+ .qdev.props = (Property[]) {
+ DEFINE_NIC_PROPERTIES(VirtIOS390Device, nic),
+ DEFINE_PROP_END_OF_LIST(),
+ },
+};
+
+static VirtIOS390DeviceInfo s390_virtio_blk = {
+ .init = s390_virtio_blk_init,
+ .qdev.name = "virtio-blk-s390",
+ .qdev.size = sizeof(VirtIOS390Device),
+ .qdev.props = (Property[]) {
+ DEFINE_PROP_DRIVE("drive", VirtIOS390Device, dinfo),
+ DEFINE_PROP_END_OF_LIST(),
+ },
+};
+
+static VirtIOS390DeviceInfo s390_virtio_console = {
+ .init = s390_virtio_console_init,
+ .qdev.name = "virtio-console-s390",
+ .qdev.size = sizeof(VirtIOS390Device),
+ .qdev.props = (Property[]) {
+ DEFINE_PROP_END_OF_LIST(),
+ },
+};
+
+static int s390_virtio_busdev_init(DeviceState *dev, DeviceInfo *info)
+{
+ VirtIOS390DeviceInfo *_info = (VirtIOS390DeviceInfo *)info;
+ VirtIOS390Device *_dev = (VirtIOS390Device *)dev;
+
+ return _info->init(_dev);
+}
+
+static void s390_virtio_bus_register_withprop(VirtIOS390DeviceInfo *info)
+{
+ info->qdev.init = s390_virtio_busdev_init;
+ info->qdev.bus_info = &s390_virtio_bus_info;
+
+ assert(info->qdev.size >= sizeof(VirtIOS390Device));
+ qdev_register(&info->qdev);
+}
+
+static void s390_virtio_register(void)
+{
+ s390_virtio_bus_register_withprop(&s390_virtio_console);
+ s390_virtio_bus_register_withprop(&s390_virtio_blk);
+ s390_virtio_bus_register_withprop(&s390_virtio_net);
+}
+device_init(s390_virtio_register);
+
+
+/***************** 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 SysBusDeviceInfo s390_virtio_bridge_info = {
+ .init = s390_virtio_bridge_init,
+ .qdev.name = "s390-virtio-bridge",
+ .qdev.size = sizeof(SysBusDevice),
+ .qdev.no_user = 1,
+};
+
+static void s390_virtio_register_devices(void)
+{
+ sysbus_register_withprop(&s390_virtio_bridge_info);
+}
+
+device_init(s390_virtio_register_devices)
diff --git a/hw/s390-virtio-bus.h b/hw/s390-virtio-bus.h
new file mode 100644
index 0000000000..ef3671421a
--- /dev/null
+++ b/hw/s390-virtio-bus.h
@@ -0,0 +1,64 @@
+/*
+ * QEMU S390x VirtIO BUS definitions
+ *
+ * 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/>.
+ */
+
+#define VIRTIO_DEV_OFFS_TYPE 0 /* 8 bits */
+#define VIRTIO_DEV_OFFS_NUM_VQ 1 /* 8 bits */
+#define VIRTIO_DEV_OFFS_FEATURE_LEN 2 /* 8 bits */
+#define VIRTIO_DEV_OFFS_CONFIG_LEN 3 /* 8 bits */
+#define VIRTIO_DEV_OFFS_STATUS 4 /* 8 bits */
+#define VIRTIO_DEV_OFFS_CONFIG 5 /* dynamic */
+
+#define VIRTIO_VQCONFIG_OFFS_TOKEN 0 /* 64 bits */
+#define VIRTIO_VQCONFIG_OFFS_ADDRESS 8 /* 64 bits */
+#define VIRTIO_VQCONFIG_OFFS_NUM 16 /* 16 bits */
+#define VIRTIO_VQCONFIG_LEN 24
+
+#define VIRTIO_RING_LEN (TARGET_PAGE_SIZE * 3)
+#define S390_DEVICE_PAGES 256
+
+typedef struct VirtIOS390Device {
+ DeviceState qdev;
+ ram_addr_t dev_offs;
+ ram_addr_t feat_offs;
+ uint8_t feat_len;
+ VirtIODevice *vdev;
+ DriveInfo *dinfo;
+ NICConf nic;
+} VirtIOS390Device;
+
+typedef struct VirtIOS390Bus {
+ BusState bus;
+
+ VirtIOS390Device *console;
+ ram_addr_t dev_page;
+ ram_addr_t dev_offs;
+ ram_addr_t next_ring;
+} VirtIOS390Bus;
+
+
+extern void s390_virtio_device_update_status(VirtIOS390Device *dev);
+
+extern VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus);
+extern VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size);
+
+extern VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus,
+ ram_addr_t mem,
+ int *vq_num);
+extern VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus,
+ ram_addr_t mem);
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-29 04:51:43 +0000