diff options
Diffstat (limited to 'hw/s390-virtio-bus.c')
| -rw-r--r-- | hw/s390-virtio-bus.c | 395 |
1 files changed, 395 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) |