root / hw / s390-virtio-bus.c @ d1ff903c
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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.h" |
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#include "sysemu.h" |
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#include "net.h" |
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#include "boards.h" |
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#include "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-serial.h" |
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#include "hw/virtio-net.h" |
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#include "hw/sysbus.h" |
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#include "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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struct BusInfo s390_virtio_bus_info = {
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.name = "s390-virtio",
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.size = sizeof(VirtIOS390Bus),
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}; |
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typedef struct { |
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DeviceInfo qdev; |
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int (*init)(VirtIOS390Device *dev);
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} VirtIOS390DeviceInfo; |
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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 target_phys_addr_t virtio_size = S390_DEVICE_PAGES * TARGET_PAGE_SIZE;
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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(&s390_virtio_bus_info, 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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/* 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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return bus;
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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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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->block); |
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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 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_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_phys(vq + VIRTIO_VQCONFIG_OFFS_ADDRESS, vring); |
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stw_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_phys(cur_offs, bswap32(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_phys(dev->feat_offs)); |
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if (vdev->set_features) {
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vdev->set_features(vdev, features); |
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} |
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vdev->guest_features = 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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VirtIOS390Device *_dev; |
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DeviceState *dev; |
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int i;
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QLIST_FOREACH(dev, &bus->bus.children, sibling) { |
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_dev = (VirtIOS390Device *)dev; |
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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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VirtIOS390Device *_dev; |
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DeviceState *dev; |
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QLIST_FOREACH(dev, &bus->bus.children, sibling) { |
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_dev = (VirtIOS390Device *)dev; |
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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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CPUState *env = s390_cpu_addr2state(0);
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if (kvm_enabled()) {
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kvm_s390_virtio_irq(env, 0, token);
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} else {
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cpu_inject_ext(env, VIRTIO_EXT_CODE, 0, token);
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} |
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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 VirtIOS390DeviceInfo s390_virtio_net = {
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.init = s390_virtio_net_init, |
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.qdev.name = "virtio-net-s390",
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.qdev.alias = "virtio-net",
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.qdev.size = sizeof(VirtIOS390Device),
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.qdev.props = (Property[]) { |
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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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}; |
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static VirtIOS390DeviceInfo s390_virtio_blk = {
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.init = s390_virtio_blk_init, |
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.qdev.name = "virtio-blk-s390",
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.qdev.alias = "virtio-blk",
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.qdev.size = sizeof(VirtIOS390Device),
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.qdev.props = (Property[]) { |
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DEFINE_BLOCK_PROPERTIES(VirtIOS390Device, block), |
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DEFINE_PROP_END_OF_LIST(), |
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}, |
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}; |
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static VirtIOS390DeviceInfo s390_virtio_serial = {
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.init = s390_virtio_serial_init, |
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.qdev.name = "virtio-serial-s390",
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.qdev.alias = "virtio-serial",
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.qdev.size = sizeof(VirtIOS390Device),
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.qdev.props = (Property[]) { |
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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(), |
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}, |
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}; |
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static int s390_virtio_busdev_init(DeviceState *dev, DeviceInfo *info) |
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{ |
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VirtIOS390DeviceInfo *_info = (VirtIOS390DeviceInfo *)info; |
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VirtIOS390Device *_dev = (VirtIOS390Device *)dev; |
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return _info->init(_dev);
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} |
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static void s390_virtio_bus_register_withprop(VirtIOS390DeviceInfo *info) |
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{ |
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info->qdev.init = s390_virtio_busdev_init; |
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info->qdev.bus_info = &s390_virtio_bus_info; |
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assert(info->qdev.size >= sizeof(VirtIOS390Device));
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qdev_register(&info->qdev); |
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} |
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static void s390_virtio_register(void) |
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{ |
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s390_virtio_bus_register_withprop(&s390_virtio_serial); |
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s390_virtio_bus_register_withprop(&s390_virtio_blk); |
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s390_virtio_bus_register_withprop(&s390_virtio_net); |
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} |
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device_init(s390_virtio_register); |
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/***************** S390 Virtio Bus Bridge Device *******************/
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/* Only required to have the virtio bus as child in the system bus */
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static int s390_virtio_bridge_init(SysBusDevice *dev) |
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{ |
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/* nothing */
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return 0; |
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} |
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static SysBusDeviceInfo s390_virtio_bridge_info = {
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.init = s390_virtio_bridge_init, |
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.qdev.name = "s390-virtio-bridge",
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.qdev.size = sizeof(SysBusDevice),
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.qdev.no_user = 1,
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}; |
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static void s390_virtio_register_devices(void) |
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{ |
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sysbus_register_withprop(&s390_virtio_bridge_info); |
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} |
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device_init(s390_virtio_register_devices) |