root / hw / s390-virtio-bus.c @ 9c17d615
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/*
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* QEMU S390 virtio target
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*
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* Copyright (c) 2009 Alexander Graf <agraf@suse.de>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "hw.h" |
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#include "block/block.h" |
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#include "sysemu/sysemu.h" |
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#include "boards.h" |
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#include "monitor/monitor.h" |
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#include "loader.h" |
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#include "elf.h" |
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#include "hw/virtio.h" |
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#include "hw/virtio-rng.h" |
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#include "hw/virtio-serial.h" |
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#include "hw/virtio-net.h" |
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#include "hw/sysbus.h" |
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#include "sysemu/kvm.h" |
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#include "hw/s390-virtio-bus.h" |
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/* #define DEBUG_S390 */
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#ifdef DEBUG_S390
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#define dprintf(fmt, ...) \
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do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
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#else
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#define dprintf(fmt, ...) \
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do { } while (0) |
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#endif
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#define VIRTIO_EXT_CODE 0x2603 |
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static const TypeInfo s390_virtio_bus_info = { |
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.name = TYPE_S390_VIRTIO_BUS, |
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.parent = TYPE_BUS, |
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.instance_size = sizeof(VirtIOS390Bus),
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}; |
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static const VirtIOBindings virtio_s390_bindings; |
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static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev);
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/* length of VirtIO device pages */
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const hwaddr virtio_size = S390_DEVICE_PAGES * TARGET_PAGE_SIZE;
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static void s390_virtio_bus_reset(void *opaque) |
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{ |
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VirtIOS390Bus *bus = opaque; |
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bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE; |
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} |
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void s390_virtio_reset_idx(VirtIOS390Device *dev)
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{ |
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int i;
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hwaddr idx_addr; |
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uint8_t num_vq; |
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num_vq = s390_virtio_device_num_vq(dev); |
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for (i = 0; i < num_vq; i++) { |
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idx_addr = virtio_queue_get_avail_addr(dev->vdev, i) + |
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VIRTIO_VRING_AVAIL_IDX_OFFS; |
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stw_phys(idx_addr, 0);
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idx_addr = virtio_queue_get_used_addr(dev->vdev, i) + |
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VIRTIO_VRING_USED_IDX_OFFS; |
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stw_phys(idx_addr, 0);
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} |
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} |
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VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size) |
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{ |
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VirtIOS390Bus *bus; |
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BusState *_bus; |
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DeviceState *dev; |
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/* Create bridge device */
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dev = qdev_create(NULL, "s390-virtio-bridge"); |
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qdev_init_nofail(dev); |
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/* Create bus on bridge device */
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_bus = qbus_create(TYPE_S390_VIRTIO_BUS, dev, "s390-virtio");
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bus = DO_UPCAST(VirtIOS390Bus, bus, _bus); |
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bus->dev_page = *ram_size; |
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bus->dev_offs = bus->dev_page; |
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bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE; |
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/* Enable hotplugging */
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_bus->allow_hotplug = 1;
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/* Allocate RAM for VirtIO device pages (descriptors, queues, rings) */
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*ram_size += S390_DEVICE_PAGES * TARGET_PAGE_SIZE; |
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qemu_register_reset(s390_virtio_bus_reset, bus); |
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return bus;
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} |
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static void s390_virtio_irq(CPUS390XState *env, int config_change, uint64_t token) |
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{ |
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if (kvm_enabled()) {
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kvm_s390_virtio_irq(env, config_change, token); |
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} else {
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cpu_inject_ext(env, VIRTIO_EXT_CODE, config_change, token); |
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} |
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} |
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static int s390_virtio_device_init(VirtIOS390Device *dev, VirtIODevice *vdev) |
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{ |
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VirtIOS390Bus *bus; |
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int dev_len;
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bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus); |
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dev->vdev = vdev; |
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dev->dev_offs = bus->dev_offs; |
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dev->feat_len = sizeof(uint32_t); /* always keep 32 bits features */ |
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dev_len = VIRTIO_DEV_OFFS_CONFIG; |
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dev_len += s390_virtio_device_num_vq(dev) * VIRTIO_VQCONFIG_LEN; |
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dev_len += dev->feat_len * 2;
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dev_len += vdev->config_len; |
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bus->dev_offs += dev_len; |
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virtio_bind_device(vdev, &virtio_s390_bindings, dev); |
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dev->host_features = vdev->get_features(vdev, dev->host_features); |
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s390_virtio_device_sync(dev); |
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s390_virtio_reset_idx(dev); |
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if (dev->qdev.hotplugged) {
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S390CPU *cpu = s390_cpu_addr2state(0);
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CPUS390XState *env = &cpu->env; |
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s390_virtio_irq(env, VIRTIO_PARAM_DEV_ADD, dev->dev_offs); |
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} |
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return 0; |
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} |
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static int s390_virtio_net_init(VirtIOS390Device *dev) |
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{ |
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VirtIODevice *vdev; |
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vdev = virtio_net_init((DeviceState *)dev, &dev->nic, &dev->net); |
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if (!vdev) {
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return -1; |
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} |
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return s390_virtio_device_init(dev, vdev);
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} |
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static int s390_virtio_blk_init(VirtIOS390Device *dev) |
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{ |
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VirtIODevice *vdev; |
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vdev = virtio_blk_init((DeviceState *)dev, &dev->blk); |
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if (!vdev) {
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return -1; |
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} |
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return s390_virtio_device_init(dev, vdev);
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} |
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static int s390_virtio_serial_init(VirtIOS390Device *dev) |
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{ |
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VirtIOS390Bus *bus; |
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VirtIODevice *vdev; |
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int r;
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bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus); |
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vdev = virtio_serial_init((DeviceState *)dev, &dev->serial); |
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if (!vdev) {
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return -1; |
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} |
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r = s390_virtio_device_init(dev, vdev); |
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if (!r) {
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bus->console = dev; |
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} |
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return r;
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} |
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static int s390_virtio_scsi_init(VirtIOS390Device *dev) |
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{ |
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VirtIODevice *vdev; |
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vdev = virtio_scsi_init((DeviceState *)dev, &dev->scsi); |
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if (!vdev) {
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return -1; |
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} |
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return s390_virtio_device_init(dev, vdev);
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} |
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static int s390_virtio_rng_init(VirtIOS390Device *dev) |
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{ |
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VirtIODevice *vdev; |
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vdev = virtio_rng_init((DeviceState *)dev, &dev->rng); |
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if (!vdev) {
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return -1; |
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} |
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return s390_virtio_device_init(dev, vdev);
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} |
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static uint64_t s390_virtio_device_vq_token(VirtIOS390Device *dev, int vq) |
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{ |
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ram_addr_t token_off; |
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token_off = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) + |
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(vq * VIRTIO_VQCONFIG_LEN) + |
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VIRTIO_VQCONFIG_OFFS_TOKEN; |
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return ldq_be_phys(token_off);
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} |
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static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev)
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{ |
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VirtIODevice *vdev = dev->vdev; |
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int num_vq;
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for (num_vq = 0; num_vq < VIRTIO_PCI_QUEUE_MAX; num_vq++) { |
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if (!virtio_queue_get_num(vdev, num_vq)) {
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break;
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} |
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} |
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return num_vq;
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} |
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static ram_addr_t s390_virtio_next_ring(VirtIOS390Bus *bus)
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{ |
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ram_addr_t r = bus->next_ring; |
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bus->next_ring += VIRTIO_RING_LEN; |
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return r;
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} |
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void s390_virtio_device_sync(VirtIOS390Device *dev)
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{ |
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VirtIOS390Bus *bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus); |
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ram_addr_t cur_offs; |
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uint8_t num_vq; |
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int i;
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virtio_reset(dev->vdev); |
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/* Sync dev space */
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stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_TYPE, dev->vdev->device_id); |
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stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, s390_virtio_device_num_vq(dev)); |
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stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_FEATURE_LEN, dev->feat_len); |
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stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG_LEN, dev->vdev->config_len); |
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num_vq = s390_virtio_device_num_vq(dev); |
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stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, num_vq); |
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/* Sync virtqueues */
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for (i = 0; i < num_vq; i++) { |
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ram_addr_t vq = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) + |
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(i * VIRTIO_VQCONFIG_LEN); |
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ram_addr_t vring; |
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vring = s390_virtio_next_ring(bus); |
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virtio_queue_set_addr(dev->vdev, i, vring); |
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virtio_queue_set_vector(dev->vdev, i, i); |
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stq_be_phys(vq + VIRTIO_VQCONFIG_OFFS_ADDRESS, vring); |
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stw_be_phys(vq + VIRTIO_VQCONFIG_OFFS_NUM, virtio_queue_get_num(dev->vdev, i)); |
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} |
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cur_offs = dev->dev_offs; |
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cur_offs += VIRTIO_DEV_OFFS_CONFIG; |
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cur_offs += num_vq * VIRTIO_VQCONFIG_LEN; |
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/* Sync feature bitmap */
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stl_le_phys(cur_offs, dev->host_features); |
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dev->feat_offs = cur_offs + dev->feat_len; |
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cur_offs += dev->feat_len * 2;
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/* Sync config space */
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if (dev->vdev->get_config) {
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dev->vdev->get_config(dev->vdev, dev->vdev->config); |
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} |
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cpu_physical_memory_write(cur_offs, |
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dev->vdev->config, dev->vdev->config_len); |
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cur_offs += dev->vdev->config_len; |
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} |
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void s390_virtio_device_update_status(VirtIOS390Device *dev)
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{ |
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VirtIODevice *vdev = dev->vdev; |
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uint32_t features; |
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virtio_set_status(vdev, ldub_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS)); |
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/* Update guest supported feature bitmap */
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features = bswap32(ldl_be_phys(dev->feat_offs)); |
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virtio_set_features(vdev, features); |
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} |
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VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus) |
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{ |
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return bus->console;
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} |
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/* Find a device by vring address */
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VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus, |
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ram_addr_t mem, |
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int *vq_num)
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{ |
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BusChild *kid; |
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int i;
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QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
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VirtIOS390Device *dev = (VirtIOS390Device *)kid->child; |
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for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) { |
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if (!virtio_queue_get_addr(dev->vdev, i))
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break;
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if (virtio_queue_get_addr(dev->vdev, i) == mem) {
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if (vq_num) {
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*vq_num = i; |
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} |
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return dev;
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} |
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} |
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} |
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return NULL; |
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} |
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/* Find a device by device descriptor location */
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VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus, ram_addr_t mem) |
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{ |
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BusChild *kid; |
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QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
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VirtIOS390Device *dev = (VirtIOS390Device *)kid->child; |
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if (dev->dev_offs == mem) {
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return dev;
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} |
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} |
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return NULL; |
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} |
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static void virtio_s390_notify(void *opaque, uint16_t vector) |
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{ |
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VirtIOS390Device *dev = (VirtIOS390Device*)opaque; |
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uint64_t token = s390_virtio_device_vq_token(dev, vector); |
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S390CPU *cpu = s390_cpu_addr2state(0);
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CPUS390XState *env = &cpu->env; |
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s390_virtio_irq(env, 0, token);
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} |
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static unsigned virtio_s390_get_features(void *opaque) |
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{ |
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VirtIOS390Device *dev = (VirtIOS390Device*)opaque; |
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return dev->host_features;
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} |
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/**************** S390 Virtio Bus Device Descriptions *******************/
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static const VirtIOBindings virtio_s390_bindings = { |
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.notify = virtio_s390_notify, |
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.get_features = virtio_s390_get_features, |
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}; |
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static Property s390_virtio_net_properties[] = {
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DEFINE_NIC_PROPERTIES(VirtIOS390Device, nic), |
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DEFINE_PROP_UINT32("x-txtimer", VirtIOS390Device,
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net.txtimer, TX_TIMER_INTERVAL), |
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DEFINE_PROP_INT32("x-txburst", VirtIOS390Device,
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net.txburst, TX_BURST), |
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DEFINE_PROP_STRING("tx", VirtIOS390Device, net.tx),
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DEFINE_PROP_END_OF_LIST(), |
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}; |
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static void s390_virtio_net_class_init(ObjectClass *klass, void *data) |
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{ |
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DeviceClass *dc = DEVICE_CLASS(klass); |
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VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass); |
403 |
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k->init = s390_virtio_net_init; |
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dc->props = s390_virtio_net_properties; |
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} |
407 |
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static TypeInfo s390_virtio_net = {
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.name = "virtio-net-s390",
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.parent = TYPE_VIRTIO_S390_DEVICE, |
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.instance_size = sizeof(VirtIOS390Device),
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.class_init = s390_virtio_net_class_init, |
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}; |
414 |
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static Property s390_virtio_blk_properties[] = {
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DEFINE_BLOCK_PROPERTIES(VirtIOS390Device, blk.conf), |
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DEFINE_BLOCK_CHS_PROPERTIES(VirtIOS390Device, blk.conf), |
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DEFINE_PROP_STRING("serial", VirtIOS390Device, blk.serial),
|
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#ifdef __linux__
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DEFINE_PROP_BIT("scsi", VirtIOS390Device, blk.scsi, 0, true), |
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#endif
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DEFINE_PROP_END_OF_LIST(), |
423 |
}; |
424 |
|
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static void s390_virtio_blk_class_init(ObjectClass *klass, void *data) |
426 |
{ |
427 |
DeviceClass *dc = DEVICE_CLASS(klass); |
428 |
VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass); |
429 |
|
430 |
k->init = s390_virtio_blk_init; |
431 |
dc->props = s390_virtio_blk_properties; |
432 |
} |
433 |
|
434 |
static TypeInfo s390_virtio_blk = {
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.name = "virtio-blk-s390",
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.parent = TYPE_VIRTIO_S390_DEVICE, |
437 |
.instance_size = sizeof(VirtIOS390Device),
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.class_init = s390_virtio_blk_class_init, |
439 |
}; |
440 |
|
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static Property s390_virtio_serial_properties[] = {
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DEFINE_PROP_UINT32("max_ports", VirtIOS390Device,
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serial.max_virtserial_ports, 31),
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DEFINE_PROP_END_OF_LIST(), |
445 |
}; |
446 |
|
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static void s390_virtio_serial_class_init(ObjectClass *klass, void *data) |
448 |
{ |
449 |
DeviceClass *dc = DEVICE_CLASS(klass); |
450 |
VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass); |
451 |
|
452 |
k->init = s390_virtio_serial_init; |
453 |
dc->props = s390_virtio_serial_properties; |
454 |
} |
455 |
|
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static TypeInfo s390_virtio_serial = {
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.name = "virtio-serial-s390",
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.parent = TYPE_VIRTIO_S390_DEVICE, |
459 |
.instance_size = sizeof(VirtIOS390Device),
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.class_init = s390_virtio_serial_class_init, |
461 |
}; |
462 |
|
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static void s390_virtio_rng_initfn(Object *obj) |
464 |
{ |
465 |
VirtIOS390Device *dev = VIRTIO_S390_DEVICE(obj); |
466 |
|
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object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
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(Object **)&dev->rng.rng, NULL);
|
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} |
470 |
|
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static void s390_virtio_rng_class_init(ObjectClass *klass, void *data) |
472 |
{ |
473 |
VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass); |
474 |
|
475 |
k->init = s390_virtio_rng_init; |
476 |
} |
477 |
|
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static TypeInfo s390_virtio_rng = {
|
479 |
.name = "virtio-rng-s390",
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.parent = TYPE_VIRTIO_S390_DEVICE, |
481 |
.instance_size = sizeof(VirtIOS390Device),
|
482 |
.instance_init = s390_virtio_rng_initfn, |
483 |
.class_init = s390_virtio_rng_class_init, |
484 |
}; |
485 |
|
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static int s390_virtio_busdev_init(DeviceState *dev) |
487 |
{ |
488 |
VirtIOS390Device *_dev = (VirtIOS390Device *)dev; |
489 |
VirtIOS390DeviceClass *_info = VIRTIO_S390_DEVICE_GET_CLASS(dev); |
490 |
|
491 |
return _info->init(_dev);
|
492 |
} |
493 |
|
494 |
static void virtio_s390_device_class_init(ObjectClass *klass, void *data) |
495 |
{ |
496 |
DeviceClass *dc = DEVICE_CLASS(klass); |
497 |
|
498 |
dc->init = s390_virtio_busdev_init; |
499 |
dc->bus_type = TYPE_S390_VIRTIO_BUS; |
500 |
dc->unplug = qdev_simple_unplug_cb; |
501 |
} |
502 |
|
503 |
static TypeInfo virtio_s390_device_info = {
|
504 |
.name = TYPE_VIRTIO_S390_DEVICE, |
505 |
.parent = TYPE_DEVICE, |
506 |
.instance_size = sizeof(VirtIOS390Device),
|
507 |
.class_init = virtio_s390_device_class_init, |
508 |
.class_size = sizeof(VirtIOS390DeviceClass),
|
509 |
.abstract = true,
|
510 |
}; |
511 |
|
512 |
static Property s390_virtio_scsi_properties[] = {
|
513 |
DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOS390Device, host_features, scsi), |
514 |
DEFINE_PROP_END_OF_LIST(), |
515 |
}; |
516 |
|
517 |
static void s390_virtio_scsi_class_init(ObjectClass *klass, void *data) |
518 |
{ |
519 |
DeviceClass *dc = DEVICE_CLASS(klass); |
520 |
VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass); |
521 |
|
522 |
k->init = s390_virtio_scsi_init; |
523 |
dc->props = s390_virtio_scsi_properties; |
524 |
} |
525 |
|
526 |
static TypeInfo s390_virtio_scsi = {
|
527 |
.name = "virtio-scsi-s390",
|
528 |
.parent = TYPE_VIRTIO_S390_DEVICE, |
529 |
.instance_size = sizeof(VirtIOS390Device),
|
530 |
.class_init = s390_virtio_scsi_class_init, |
531 |
}; |
532 |
|
533 |
/***************** S390 Virtio Bus Bridge Device *******************/
|
534 |
/* Only required to have the virtio bus as child in the system bus */
|
535 |
|
536 |
static int s390_virtio_bridge_init(SysBusDevice *dev) |
537 |
{ |
538 |
/* nothing */
|
539 |
return 0; |
540 |
} |
541 |
|
542 |
static void s390_virtio_bridge_class_init(ObjectClass *klass, void *data) |
543 |
{ |
544 |
DeviceClass *dc = DEVICE_CLASS(klass); |
545 |
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
546 |
|
547 |
k->init = s390_virtio_bridge_init; |
548 |
dc->no_user = 1;
|
549 |
} |
550 |
|
551 |
static TypeInfo s390_virtio_bridge_info = {
|
552 |
.name = "s390-virtio-bridge",
|
553 |
.parent = TYPE_SYS_BUS_DEVICE, |
554 |
.instance_size = sizeof(SysBusDevice),
|
555 |
.class_init = s390_virtio_bridge_class_init, |
556 |
}; |
557 |
|
558 |
static void s390_virtio_register_types(void) |
559 |
{ |
560 |
type_register_static(&s390_virtio_bus_info); |
561 |
type_register_static(&virtio_s390_device_info); |
562 |
type_register_static(&s390_virtio_serial); |
563 |
type_register_static(&s390_virtio_blk); |
564 |
type_register_static(&s390_virtio_net); |
565 |
type_register_static(&s390_virtio_scsi); |
566 |
type_register_static(&s390_virtio_rng); |
567 |
type_register_static(&s390_virtio_bridge_info); |
568 |
} |
569 |
|
570 |
type_init(s390_virtio_register_types) |