diff options
Diffstat (limited to 'src/hw/s390x/virtio-ccw.c')
| -rw-r--r-- | src/hw/s390x/virtio-ccw.c | 1988 |
1 files changed, 1988 insertions, 0 deletions
diff --git a/src/hw/s390x/virtio-ccw.c b/src/hw/s390x/virtio-ccw.c new file mode 100644 index 0000000..63da303 --- /dev/null +++ b/src/hw/s390x/virtio-ccw.c @@ -0,0 +1,1988 @@ +/* + * virtio ccw target implementation + * + * Copyright 2012,2015 IBM Corp. + * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com> + * Pierre Morel <pmorel@linux.vnet.ibm.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or (at + * your option) any later version. See the COPYING file in the top-level + * directory. + */ + +#include "hw/hw.h" +#include "sysemu/block-backend.h" +#include "sysemu/blockdev.h" +#include "sysemu/sysemu.h" +#include "net/net.h" +#include "hw/virtio/virtio.h" +#include "hw/virtio/virtio-serial.h" +#include "hw/virtio/virtio-net.h" +#include "hw/sysbus.h" +#include "qemu/bitops.h" +#include "qemu/error-report.h" +#include "hw/virtio/virtio-access.h" +#include "hw/virtio/virtio-bus.h" +#include "hw/s390x/adapter.h" +#include "hw/s390x/s390_flic.h" + +#include "ioinst.h" +#include "css.h" +#include "virtio-ccw.h" +#include "trace.h" + +static QTAILQ_HEAD(, IndAddr) indicator_addresses = + QTAILQ_HEAD_INITIALIZER(indicator_addresses); + +static IndAddr *get_indicator(hwaddr ind_addr, int len) +{ + IndAddr *indicator; + + QTAILQ_FOREACH(indicator, &indicator_addresses, sibling) { + if (indicator->addr == ind_addr) { + indicator->refcnt++; + return indicator; + } + } + indicator = g_new0(IndAddr, 1); + indicator->addr = ind_addr; + indicator->len = len; + indicator->refcnt = 1; + QTAILQ_INSERT_TAIL(&indicator_addresses, indicator, sibling); + return indicator; +} + +static int s390_io_adapter_map(AdapterInfo *adapter, uint64_t map_addr, + bool do_map) +{ + S390FLICState *fs = s390_get_flic(); + S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); + + return fsc->io_adapter_map(fs, adapter->adapter_id, map_addr, do_map); +} + +static void release_indicator(AdapterInfo *adapter, IndAddr *indicator) +{ + assert(indicator->refcnt > 0); + indicator->refcnt--; + if (indicator->refcnt > 0) { + return; + } + QTAILQ_REMOVE(&indicator_addresses, indicator, sibling); + if (indicator->map) { + s390_io_adapter_map(adapter, indicator->map, false); + } + g_free(indicator); +} + +static int map_indicator(AdapterInfo *adapter, IndAddr *indicator) +{ + int ret; + + if (indicator->map) { + return 0; /* already mapped is not an error */ + } + indicator->map = indicator->addr; + ret = s390_io_adapter_map(adapter, indicator->map, true); + if ((ret != 0) && (ret != -ENOSYS)) { + goto out_err; + } + return 0; + +out_err: + indicator->map = 0; + return ret; +} + +static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, + VirtioCcwDevice *dev); + +static void virtual_css_bus_reset(BusState *qbus) +{ + /* This should actually be modelled via the generic css */ + css_reset(); +} + + +static void virtual_css_bus_class_init(ObjectClass *klass, void *data) +{ + BusClass *k = BUS_CLASS(klass); + + k->reset = virtual_css_bus_reset; +} + +static const TypeInfo virtual_css_bus_info = { + .name = TYPE_VIRTUAL_CSS_BUS, + .parent = TYPE_BUS, + .instance_size = sizeof(VirtualCssBus), + .class_init = virtual_css_bus_class_init, +}; + +VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch) +{ + VirtIODevice *vdev = NULL; + VirtioCcwDevice *dev = sch->driver_data; + + if (dev) { + vdev = virtio_bus_get_device(&dev->bus); + } + return vdev; +} + +static int virtio_ccw_set_guest2host_notifier(VirtioCcwDevice *dev, int n, + bool assign, bool set_handler) +{ + VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); + VirtQueue *vq = virtio_get_queue(vdev, n); + EventNotifier *notifier = virtio_queue_get_host_notifier(vq); + int r = 0; + SubchDev *sch = dev->sch; + uint32_t sch_id = (css_build_subchannel_id(sch) << 16) | sch->schid; + + if (assign) { + r = event_notifier_init(notifier, 1); + if (r < 0) { + error_report("%s: unable to init event notifier: %d", __func__, r); + return r; + } + virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler); + r = s390_assign_subch_ioeventfd(notifier, sch_id, n, assign); + if (r < 0) { + error_report("%s: unable to assign ioeventfd: %d", __func__, r); + virtio_queue_set_host_notifier_fd_handler(vq, false, false); + event_notifier_cleanup(notifier); + return r; + } + } else { + virtio_queue_set_host_notifier_fd_handler(vq, false, false); + s390_assign_subch_ioeventfd(notifier, sch_id, n, assign); + event_notifier_cleanup(notifier); + } + return r; +} + +static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev) +{ + VirtIODevice *vdev; + int n, r; + + if (!(dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) || + dev->ioeventfd_disabled || + dev->ioeventfd_started) { + return; + } + vdev = virtio_bus_get_device(&dev->bus); + for (n = 0; n < VIRTIO_CCW_QUEUE_MAX; n++) { + if (!virtio_queue_get_num(vdev, n)) { + continue; + } + r = virtio_ccw_set_guest2host_notifier(dev, n, true, true); + if (r < 0) { + goto assign_error; + } + } + dev->ioeventfd_started = true; + return; + + assign_error: + while (--n >= 0) { + if (!virtio_queue_get_num(vdev, n)) { + continue; + } + r = virtio_ccw_set_guest2host_notifier(dev, n, false, false); + assert(r >= 0); + } + dev->ioeventfd_started = false; + /* Disable ioeventfd for this device. */ + dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD; + error_report("%s: failed. Fallback to userspace (slower).", __func__); +} + +static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev) +{ + VirtIODevice *vdev; + int n, r; + + if (!dev->ioeventfd_started) { + return; + } + vdev = virtio_bus_get_device(&dev->bus); + for (n = 0; n < VIRTIO_CCW_QUEUE_MAX; n++) { + if (!virtio_queue_get_num(vdev, n)) { + continue; + } + r = virtio_ccw_set_guest2host_notifier(dev, n, false, false); + assert(r >= 0); + } + dev->ioeventfd_started = false; +} + +VirtualCssBus *virtual_css_bus_init(void) +{ + VirtualCssBus *cbus; + BusState *bus; + DeviceState *dev; + + /* Create bridge device */ + dev = qdev_create(NULL, "virtual-css-bridge"); + qdev_init_nofail(dev); + + /* Create bus on bridge device */ + bus = qbus_create(TYPE_VIRTUAL_CSS_BUS, dev, "virtual-css"); + cbus = VIRTUAL_CSS_BUS(bus); + + /* Enable hotplugging */ + qbus_set_hotplug_handler(bus, dev, &error_abort); + + return cbus; +} + +/* Communication blocks used by several channel commands. */ +typedef struct VqInfoBlockLegacy { + uint64_t queue; + uint32_t align; + uint16_t index; + uint16_t num; +} QEMU_PACKED VqInfoBlockLegacy; + +typedef struct VqInfoBlock { + uint64_t desc; + uint32_t res0; + uint16_t index; + uint16_t num; + uint64_t avail; + uint64_t used; +} QEMU_PACKED VqInfoBlock; + +typedef struct VqConfigBlock { + uint16_t index; + uint16_t num_max; +} QEMU_PACKED VqConfigBlock; + +typedef struct VirtioFeatDesc { + uint32_t features; + uint8_t index; +} QEMU_PACKED VirtioFeatDesc; + +typedef struct VirtioThinintInfo { + hwaddr summary_indicator; + hwaddr device_indicator; + uint64_t ind_bit; + uint8_t isc; +} QEMU_PACKED VirtioThinintInfo; + +typedef struct VirtioRevInfo { + uint16_t revision; + uint16_t length; + uint8_t data[0]; +} QEMU_PACKED VirtioRevInfo; + +/* Specify where the virtqueues for the subchannel are in guest memory. */ +static int virtio_ccw_set_vqs(SubchDev *sch, VqInfoBlock *info, + VqInfoBlockLegacy *linfo) +{ + VirtIODevice *vdev = virtio_ccw_get_vdev(sch); + uint16_t index = info ? info->index : linfo->index; + uint16_t num = info ? info->num : linfo->num; + uint64_t desc = info ? info->desc : linfo->queue; + + if (index >= VIRTIO_CCW_QUEUE_MAX) { + return -EINVAL; + } + + /* Current code in virtio.c relies on 4K alignment. */ + if (linfo && desc && (linfo->align != 4096)) { + return -EINVAL; + } + + if (!vdev) { + return -EINVAL; + } + + if (info) { + virtio_queue_set_rings(vdev, index, desc, info->avail, info->used); + } else { + virtio_queue_set_addr(vdev, index, desc); + } + if (!desc) { + virtio_queue_set_vector(vdev, index, VIRTIO_NO_VECTOR); + } else { + if (info) { + /* virtio-1 allows changing the ring size. */ + if (virtio_queue_get_num(vdev, index) < num) { + /* Fail if we exceed the maximum number. */ + return -EINVAL; + } + virtio_queue_set_num(vdev, index, num); + } else if (virtio_queue_get_num(vdev, index) > num) { + /* Fail if we don't have a big enough queue. */ + return -EINVAL; + } + /* We ignore possible increased num for legacy for compatibility. */ + virtio_queue_set_vector(vdev, index, index); + } + /* tell notify handler in case of config change */ + vdev->config_vector = VIRTIO_CCW_QUEUE_MAX; + return 0; +} + +static void virtio_ccw_reset_virtio(VirtioCcwDevice *dev, VirtIODevice *vdev) +{ + virtio_ccw_stop_ioeventfd(dev); + virtio_reset(vdev); + if (dev->indicators) { + release_indicator(&dev->routes.adapter, dev->indicators); + dev->indicators = NULL; + } + if (dev->indicators2) { + release_indicator(&dev->routes.adapter, dev->indicators2); + dev->indicators2 = NULL; + } + if (dev->summary_indicator) { + release_indicator(&dev->routes.adapter, dev->summary_indicator); + dev->summary_indicator = NULL; + } + dev->sch->thinint_active = false; +} + +static int virtio_ccw_handle_set_vq(SubchDev *sch, CCW1 ccw, bool check_len, + bool is_legacy) +{ + int ret; + VqInfoBlock info; + VqInfoBlockLegacy linfo; + size_t info_len = is_legacy ? sizeof(linfo) : sizeof(info); + + if (check_len) { + if (ccw.count != info_len) { + return -EINVAL; + } + } else if (ccw.count < info_len) { + /* Can't execute command. */ + return -EINVAL; + } + if (!ccw.cda) { + return -EFAULT; + } + if (is_legacy) { + linfo.queue = address_space_ldq_be(&address_space_memory, ccw.cda, + MEMTXATTRS_UNSPECIFIED, NULL); + linfo.align = address_space_ldl_be(&address_space_memory, + ccw.cda + sizeof(linfo.queue), + MEMTXATTRS_UNSPECIFIED, + NULL); + linfo.index = address_space_lduw_be(&address_space_memory, + ccw.cda + sizeof(linfo.queue) + + sizeof(linfo.align), + MEMTXATTRS_UNSPECIFIED, + NULL); + linfo.num = address_space_lduw_be(&address_space_memory, + ccw.cda + sizeof(linfo.queue) + + sizeof(linfo.align) + + sizeof(linfo.index), + MEMTXATTRS_UNSPECIFIED, + NULL); + ret = virtio_ccw_set_vqs(sch, NULL, &linfo); + } else { + info.desc = address_space_ldq_be(&address_space_memory, ccw.cda, + MEMTXATTRS_UNSPECIFIED, NULL); + info.index = address_space_lduw_be(&address_space_memory, + ccw.cda + sizeof(info.desc) + + sizeof(info.res0), + MEMTXATTRS_UNSPECIFIED, NULL); + info.num = address_space_lduw_be(&address_space_memory, + ccw.cda + sizeof(info.desc) + + sizeof(info.res0) + + sizeof(info.index), + MEMTXATTRS_UNSPECIFIED, NULL); + info.avail = address_space_ldq_be(&address_space_memory, + ccw.cda + sizeof(info.desc) + + sizeof(info.res0) + + sizeof(info.index) + + sizeof(info.num), + MEMTXATTRS_UNSPECIFIED, NULL); + info.used = address_space_ldq_be(&address_space_memory, + ccw.cda + sizeof(info.desc) + + sizeof(info.res0) + + sizeof(info.index) + + sizeof(info.num) + + sizeof(info.avail), + MEMTXATTRS_UNSPECIFIED, NULL); + ret = virtio_ccw_set_vqs(sch, &info, NULL); + } + sch->curr_status.scsw.count = 0; + return ret; +} + +static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) +{ + int ret; + VirtioRevInfo revinfo; + uint8_t status; + VirtioFeatDesc features; + void *config; + hwaddr indicators; + VqConfigBlock vq_config; + VirtioCcwDevice *dev = sch->driver_data; + VirtIODevice *vdev = virtio_ccw_get_vdev(sch); + bool check_len; + int len; + hwaddr hw_len; + VirtioThinintInfo *thinint; + + if (!dev) { + return -EINVAL; + } + + trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid, + ccw.cmd_code); + check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC)); + + /* Look at the command. */ + switch (ccw.cmd_code) { + case CCW_CMD_SET_VQ: + ret = virtio_ccw_handle_set_vq(sch, ccw, check_len, dev->revision < 1); + break; + case CCW_CMD_VDEV_RESET: + virtio_ccw_reset_virtio(dev, vdev); + ret = 0; + break; + case CCW_CMD_READ_FEAT: + if (check_len) { + if (ccw.count != sizeof(features)) { + ret = -EINVAL; + break; + } + } else if (ccw.count < sizeof(features)) { + /* Can't execute command. */ + ret = -EINVAL; + break; + } + if (!ccw.cda) { + ret = -EFAULT; + } else { + features.index = address_space_ldub(&address_space_memory, + ccw.cda + + sizeof(features.features), + MEMTXATTRS_UNSPECIFIED, + NULL); + if (features.index == 0) { + if (dev->revision >= 1) { + /* Don't offer legacy features for modern devices. */ + features.features = (uint32_t) + (vdev->host_features & ~VIRTIO_LEGACY_FEATURES); + } else { + features.features = (uint32_t)vdev->host_features; + } + } else if ((features.index == 1) && (dev->revision >= 1)) { + /* + * Only offer feature bits beyond 31 if the guest has + * negotiated at least revision 1. + */ + features.features = (uint32_t)(vdev->host_features >> 32); + } else { + /* Return zeroes if the guest supports more feature bits. */ + features.features = 0; + } + address_space_stl_le(&address_space_memory, ccw.cda, + features.features, MEMTXATTRS_UNSPECIFIED, + NULL); + sch->curr_status.scsw.count = ccw.count - sizeof(features); + ret = 0; + } + break; + case CCW_CMD_WRITE_FEAT: + if (check_len) { + if (ccw.count != sizeof(features)) { + ret = -EINVAL; + break; + } + } else if (ccw.count < sizeof(features)) { + /* Can't execute command. */ + ret = -EINVAL; + break; + } + if (!ccw.cda) { + ret = -EFAULT; + } else { + features.index = address_space_ldub(&address_space_memory, + ccw.cda + + sizeof(features.features), + MEMTXATTRS_UNSPECIFIED, + NULL); + features.features = address_space_ldl_le(&address_space_memory, + ccw.cda, + MEMTXATTRS_UNSPECIFIED, + NULL); + if (features.index == 0) { + virtio_set_features(vdev, + (vdev->guest_features & 0xffffffff00000000ULL) | + features.features); + } else if ((features.index == 1) && (dev->revision >= 1)) { + /* + * If the guest did not negotiate at least revision 1, + * we did not offer it any feature bits beyond 31. Such a + * guest passing us any bit here is therefore buggy. + */ + virtio_set_features(vdev, + (vdev->guest_features & 0x00000000ffffffffULL) | + ((uint64_t)features.features << 32)); + } else { + /* + * If the guest supports more feature bits, assert that it + * passes us zeroes for those we don't support. + */ + if (features.features) { + fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n", + features.index, features.features); + /* XXX: do a unit check here? */ + } + } + sch->curr_status.scsw.count = ccw.count - sizeof(features); + ret = 0; + } + break; + case CCW_CMD_READ_CONF: + if (check_len) { + if (ccw.count > vdev->config_len) { + ret = -EINVAL; + break; + } + } + len = MIN(ccw.count, vdev->config_len); + if (!ccw.cda) { + ret = -EFAULT; + } else { + virtio_bus_get_vdev_config(&dev->bus, vdev->config); + /* XXX config space endianness */ + cpu_physical_memory_write(ccw.cda, vdev->config, len); + sch->curr_status.scsw.count = ccw.count - len; + ret = 0; + } + break; + case CCW_CMD_WRITE_CONF: + if (check_len) { + if (ccw.count > vdev->config_len) { + ret = -EINVAL; + break; + } + } + len = MIN(ccw.count, vdev->config_len); + hw_len = len; + if (!ccw.cda) { + ret = -EFAULT; + } else { + config = cpu_physical_memory_map(ccw.cda, &hw_len, 0); + if (!config) { + ret = -EFAULT; + } else { + len = hw_len; + /* XXX config space endianness */ + memcpy(vdev->config, config, len); + cpu_physical_memory_unmap(config, hw_len, 0, hw_len); + virtio_bus_set_vdev_config(&dev->bus, vdev->config); + sch->curr_status.scsw.count = ccw.count - len; + ret = 0; + } + } + break; + case CCW_CMD_WRITE_STATUS: + if (check_len) { + if (ccw.count != sizeof(status)) { + ret = -EINVAL; + break; + } + } else if (ccw.count < sizeof(status)) { + /* Can't execute command. */ + ret = -EINVAL; + break; + } + if (!ccw.cda) { + ret = -EFAULT; + } else { + status = address_space_ldub(&address_space_memory, ccw.cda, + MEMTXATTRS_UNSPECIFIED, NULL); + if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { + virtio_ccw_stop_ioeventfd(dev); + } + if (virtio_set_status(vdev, status) == 0) { + if (vdev->status == 0) { + virtio_ccw_reset_virtio(dev, vdev); + } + if (status & VIRTIO_CONFIG_S_DRIVER_OK) { + virtio_ccw_start_ioeventfd(dev); + } + sch->curr_status.scsw.count = ccw.count - sizeof(status); + ret = 0; + } else { + /* Trigger a command reject. */ + ret = -ENOSYS; + } + } + break; + case CCW_CMD_SET_IND: + if (check_len) { + if (ccw.count != sizeof(indicators)) { + ret = -EINVAL; + break; + } + } else if (ccw.count < sizeof(indicators)) { + /* Can't execute command. */ + ret = -EINVAL; + break; + } + if (sch->thinint_active) { + /* Trigger a command reject. */ + ret = -ENOSYS; + break; + } + if (!ccw.cda) { + ret = -EFAULT; + } else { + indicators = address_space_ldq_be(&address_space_memory, ccw.cda, + MEMTXATTRS_UNSPECIFIED, NULL); + dev->indicators = get_indicator(indicators, sizeof(uint64_t)); + sch->curr_status.scsw.count = ccw.count - sizeof(indicators); + ret = 0; + } + break; + case CCW_CMD_SET_CONF_IND: + if (check_len) { + if (ccw.count != sizeof(indicators)) { + ret = -EINVAL; + break; + } + } else if (ccw.count < sizeof(indicators)) { + /* Can't execute command. */ + ret = -EINVAL; + break; + } + if (!ccw.cda) { + ret = -EFAULT; + } else { + indicators = address_space_ldq_be(&address_space_memory, ccw.cda, + MEMTXATTRS_UNSPECIFIED, NULL); + dev->indicators2 = get_indicator(indicators, sizeof(uint64_t)); + sch->curr_status.scsw.count = ccw.count - sizeof(indicators); + ret = 0; + } + break; + case CCW_CMD_READ_VQ_CONF: + if (check_len) { + if (ccw.count != sizeof(vq_config)) { + ret = -EINVAL; + break; + } + } else if (ccw.count < sizeof(vq_config)) { + /* Can't execute command. */ + ret = -EINVAL; + break; + } + if (!ccw.cda) { + ret = -EFAULT; + } else { + vq_config.index = address_space_lduw_be(&address_space_memory, + ccw.cda, + MEMTXATTRS_UNSPECIFIED, + NULL); + if (vq_config.index >= VIRTIO_CCW_QUEUE_MAX) { + ret = -EINVAL; + break; + } + vq_config.num_max = virtio_queue_get_num(vdev, + vq_config.index); + address_space_stw_be(&address_space_memory, + ccw.cda + sizeof(vq_config.index), + vq_config.num_max, + MEMTXATTRS_UNSPECIFIED, + NULL); + sch->curr_status.scsw.count = ccw.count - sizeof(vq_config); + ret = 0; + } + break; + case CCW_CMD_SET_IND_ADAPTER: + if (check_len) { + if (ccw.count != sizeof(*thinint)) { + ret = -EINVAL; + break; + } + } else if (ccw.count < sizeof(*thinint)) { + /* Can't execute command. */ + ret = -EINVAL; + break; + } + len = sizeof(*thinint); + hw_len = len; + if (!ccw.cda) { + ret = -EFAULT; + } else if (dev->indicators && !sch->thinint_active) { + /* Trigger a command reject. */ + ret = -ENOSYS; + } else { + thinint = cpu_physical_memory_map(ccw.cda, &hw_len, 0); + if (!thinint) { + ret = -EFAULT; + } else { + uint64_t ind_bit = ldq_be_p(&thinint->ind_bit); + + len = hw_len; + dev->summary_indicator = + get_indicator(ldq_be_p(&thinint->summary_indicator), + sizeof(uint8_t)); + dev->indicators = + get_indicator(ldq_be_p(&thinint->device_indicator), + ind_bit / 8 + 1); + dev->thinint_isc = thinint->isc; + dev->routes.adapter.ind_offset = ind_bit; + dev->routes.adapter.summary_offset = 7; + cpu_physical_memory_unmap(thinint, hw_len, 0, hw_len); + ret = css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, + dev->thinint_isc, true, false, + &dev->routes.adapter.adapter_id); + assert(ret == 0); + sch->thinint_active = ((dev->indicators != NULL) && + (dev->summary_indicator != NULL)); + sch->curr_status.scsw.count = ccw.count - len; + ret = 0; + } + } + break; + case CCW_CMD_SET_VIRTIO_REV: + len = sizeof(revinfo); + if (ccw.count < len) { + ret = -EINVAL; + break; + } + if (!ccw.cda) { + ret = -EFAULT; + break; + } + revinfo.revision = + address_space_lduw_be(&address_space_memory, ccw.cda, + MEMTXATTRS_UNSPECIFIED, NULL); + revinfo.length = + address_space_lduw_be(&address_space_memory, + ccw.cda + sizeof(revinfo.revision), + MEMTXATTRS_UNSPECIFIED, NULL); + if (ccw.count < len + revinfo.length || + (check_len && ccw.count > len + revinfo.length)) { + ret = -EINVAL; + break; + } + /* + * Once we start to support revisions with additional data, we'll + * need to fetch it here. Nothing to do for now, though. + */ + if (dev->revision >= 0 || + revinfo.revision > virtio_ccw_rev_max(dev)) { + ret = -ENOSYS; + break; + } + ret = 0; + dev->revision = revinfo.revision; + break; + default: + ret = -ENOSYS; + break; + } + return ret; +} + +static void virtio_sch_disable_cb(SubchDev *sch) +{ + VirtioCcwDevice *dev = sch->driver_data; + + dev->revision = -1; +} + +static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) +{ + unsigned int cssid = 0; + unsigned int ssid = 0; + unsigned int schid; + unsigned int devno; + bool have_devno = false; + bool found = false; + SubchDev *sch; + int num; + Error *err = NULL; + VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev); + + sch = g_malloc0(sizeof(SubchDev)); + + sch->driver_data = dev; + dev->sch = sch; + + dev->indicators = NULL; + + /* Initialize subchannel structure. */ + sch->channel_prog = 0x0; + sch->last_cmd_valid = false; + sch->thinint_active = false; + /* + * Use a device number if provided. Otherwise, fall back to subchannel + * number. + */ + if (dev->bus_id) { + num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno); + if (num == 3) { + if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) { + error_setg(errp, "Invalid cssid or ssid: cssid %x, ssid %x", + cssid, ssid); + goto out_err; + } + /* Enforce use of virtual cssid. */ + if (cssid != VIRTUAL_CSSID) { + error_setg(errp, "cssid %x not valid for virtio devices", + cssid); + goto out_err; + } + if (css_devno_used(cssid, ssid, devno)) { + error_setg(errp, "Device %x.%x.%04x already exists", + cssid, ssid, devno); + goto out_err; + } + sch->cssid = cssid; + sch->ssid = ssid; + sch->devno = devno; + have_devno = true; + } else { + error_setg(errp, "Malformed devno parameter '%s'", dev->bus_id); + goto out_err; + } + } + + /* Find the next free id. */ + if (have_devno) { + for (schid = 0; schid <= MAX_SCHID; schid++) { + if (!css_find_subch(1, cssid, ssid, schid)) { + sch->schid = schid; + css_subch_assign(cssid, ssid, schid, devno, sch); + found = true; + break; + } + } + if (!found) { + error_setg(errp, "No free subchannel found for %x.%x.%04x", + cssid, ssid, devno); + goto out_err; + } + trace_virtio_ccw_new_device(cssid, ssid, schid, devno, + "user-configured"); + } else { + cssid = VIRTUAL_CSSID; + for (ssid = 0; ssid <= MAX_SSID; ssid++) { + for (schid = 0; schid <= MAX_SCHID; schid++) { + if (!css_find_subch(1, cssid, ssid, schid)) { + sch->cssid = cssid; + sch->ssid = ssid; + sch->schid = schid; + devno = schid; + /* + * If the devno is already taken, look further in this + * subchannel set. + */ + while (css_devno_used(cssid, ssid, devno)) { + if (devno == MAX_SCHID) { + devno = 0; + } else if (devno == schid - 1) { + error_setg(errp, "No free devno found"); + goto out_err; + } else { + devno++; + } + } + sch->devno = devno; + css_subch_assign(cssid, ssid, schid, devno, sch); + found = true; + break; + } + } + if (found) { + break; + } + } + if (!found) { + error_setg(errp, "Virtual channel subsystem is full!"); + goto out_err; + } + trace_virtio_ccw_new_device(cssid, ssid, schid, devno, + "auto-configured"); + } + + /* Build initial schib. */ + css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE); + + sch->ccw_cb = virtio_ccw_cb; + sch->disable_cb = virtio_sch_disable_cb; + + /* Build senseid data. */ + memset(&sch->id, 0, sizeof(SenseId)); + sch->id.reserved = 0xff; + sch->id.cu_type = VIRTIO_CCW_CU_TYPE; + + dev->revision = -1; + + if (k->realize) { + k->realize(dev, &err); + } + if (err) { + error_propagate(errp, err); + css_subch_assign(cssid, ssid, schid, devno, NULL); + goto out_err; + } + + return; + +out_err: + dev->sch = NULL; + g_free(sch); +} + +static int virtio_ccw_exit(VirtioCcwDevice *dev) +{ + SubchDev *sch = dev->sch; + + if (sch) { + css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); + g_free(sch); + } + if (dev->indicators) { + release_indicator(&dev->routes.adapter, dev->indicators); + dev->indicators = NULL; + } + return 0; +} + +static void virtio_ccw_net_realize(VirtioCcwDevice *ccw_dev, Error **errp) +{ + DeviceState *qdev = DEVICE(ccw_dev); + VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev); + DeviceState *vdev = DEVICE(&dev->vdev); + Error *err = NULL; + + virtio_net_set_netclient_name(&dev->vdev, qdev->id, + object_get_typename(OBJECT(qdev))); + qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); + object_property_set_bool(OBJECT(vdev), true, "realized", &err); + if (err) { + error_propagate(errp, err); + } +} + +static void virtio_ccw_net_instance_init(Object *obj) +{ + VirtIONetCcw *dev = VIRTIO_NET_CCW(obj); + + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VIRTIO_NET); + object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), + "bootindex", &error_abort); +} + +static void virtio_ccw_blk_realize(VirtioCcwDevice *ccw_dev, Error **errp) +{ + VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev); + DeviceState *vdev = DEVICE(&dev->vdev); + Error *err = NULL; + + qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); + object_property_set_bool(OBJECT(vdev), true, "realized", &err); + if (err) { + error_propagate(errp, err); + } +} + +static void virtio_ccw_blk_instance_init(Object *obj) +{ + VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj); + + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VIRTIO_BLK); + object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread", + &error_abort); + object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), + "bootindex", &error_abort); +} + +static void virtio_ccw_serial_realize(VirtioCcwDevice *ccw_dev, Error **errp) +{ + VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev); + DeviceState *vdev = DEVICE(&dev->vdev); + DeviceState *proxy = DEVICE(ccw_dev); + Error *err = NULL; + char *bus_name; + + /* + * For command line compatibility, this sets the virtio-serial-device bus + * name as before. + */ + if (proxy->id) { + bus_name = g_strdup_printf("%s.0", proxy->id); + virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); + g_free(bus_name); + } + + qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); + object_property_set_bool(OBJECT(vdev), true, "realized", &err); + if (err) { + error_propagate(errp, err); + } +} + + +static void virtio_ccw_serial_instance_init(Object *obj) +{ + VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj); + + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VIRTIO_SERIAL); +} + +static void virtio_ccw_balloon_realize(VirtioCcwDevice *ccw_dev, Error **errp) +{ + VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev); + DeviceState *vdev = DEVICE(&dev->vdev); + Error *err = NULL; + + qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); + object_property_set_bool(OBJECT(vdev), true, "realized", &err); + if (err) { + error_propagate(errp, err); + } +} + +static void virtio_ccw_balloon_instance_init(Object *obj) +{ + VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj); + + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VIRTIO_BALLOON); + object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev), + "guest-stats", &error_abort); + object_property_add_alias(obj, "guest-stats-polling-interval", + OBJECT(&dev->vdev), + "guest-stats-polling-interval", &error_abort); +} + +static void virtio_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp) +{ + VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev); + DeviceState *vdev = DEVICE(&dev->vdev); + DeviceState *qdev = DEVICE(ccw_dev); + Error *err = NULL; + char *bus_name; + + /* + * For command line compatibility, this sets the virtio-scsi-device bus + * name as before. + */ + if (qdev->id) { + bus_name = g_strdup_printf("%s.0", qdev->id); + virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); + g_free(bus_name); + } + + qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); + object_property_set_bool(OBJECT(vdev), true, "realized", &err); + if (err) { + error_propagate(errp, err); + } +} + +static void virtio_ccw_scsi_instance_init(Object *obj) +{ + VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj); + + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VIRTIO_SCSI); + object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread", + &error_abort); +} + +#ifdef CONFIG_VHOST_SCSI +static void vhost_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp) +{ + VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev); + DeviceState *vdev = DEVICE(&dev->vdev); + Error *err = NULL; + + qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); + object_property_set_bool(OBJECT(vdev), true, "realized", &err); + if (err) { + error_propagate(errp, err); + } +} + +static void vhost_ccw_scsi_instance_init(Object *obj) +{ + VHostSCSICcw *dev = VHOST_SCSI_CCW(obj); + + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VHOST_SCSI); +} +#endif + +static void virtio_ccw_rng_realize(VirtioCcwDevice *ccw_dev, Error **errp) +{ + VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev); + DeviceState *vdev = DEVICE(&dev->vdev); + Error *err = NULL; + + qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); + object_property_set_bool(OBJECT(vdev), true, "realized", &err); + if (err) { + error_propagate(errp, err); + return; + } + + object_property_set_link(OBJECT(dev), + OBJECT(dev->vdev.conf.rng), "rng", + NULL); +} + +/* DeviceState to VirtioCcwDevice. Note: used on datapath, + * be careful and test performance if you change this. + */ +static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d) +{ + return container_of(d, VirtioCcwDevice, parent_obj); +} + +static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc, + uint8_t to_be_set) +{ + uint8_t ind_old, ind_new; + hwaddr len = 1; + uint8_t *ind_addr; + + ind_addr = cpu_physical_memory_map(ind_loc, &len, 1); + if (!ind_addr) { + error_report("%s(%x.%x.%04x): unable to access indicator", + __func__, sch->cssid, sch->ssid, sch->schid); + return -1; + } + do { + ind_old = *ind_addr; + ind_new = ind_old | to_be_set; + } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old); + cpu_physical_memory_unmap(ind_addr, len, 1, len); + + return ind_old; +} + +static void virtio_ccw_notify(DeviceState *d, uint16_t vector) +{ + VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d); + SubchDev *sch = dev->sch; + uint64_t indicators; + + if (vector >= 128) { + return; + } + + if (vector < VIRTIO_CCW_QUEUE_MAX) { + if (!dev->indicators) { + return; + } + if (sch->thinint_active) { + /* + * In the adapter interrupt case, indicators points to a + * memory area that may be (way) larger than 64 bit and + * ind_bit indicates the start of the indicators in a big + * endian notation. + */ + uint64_t ind_bit = dev->routes.adapter.ind_offset; + + virtio_set_ind_atomic(sch, dev->indicators->addr + + (ind_bit + vector) / 8, + 0x80 >> ((ind_bit + vector) % 8)); + if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr, + 0x01)) { + css_adapter_interrupt(dev->thinint_isc); + } + } else { + indicators = address_space_ldq(&address_space_memory, + dev->indicators->addr, + MEMTXATTRS_UNSPECIFIED, + NULL); + indicators |= 1ULL << vector; + address_space_stq(&address_space_memory, dev->indicators->addr, + indicators, MEMTXATTRS_UNSPECIFIED, NULL); + css_conditional_io_interrupt(sch); + } + } else { + if (!dev->indicators2) { + return; + } + vector = 0; + indicators = address_space_ldq(&address_space_memory, + dev->indicators2->addr, + MEMTXATTRS_UNSPECIFIED, + NULL); + indicators |= 1ULL << vector; + address_space_stq(&address_space_memory, dev->indicators2->addr, + indicators, MEMTXATTRS_UNSPECIFIED, NULL); + css_conditional_io_interrupt(sch); + } +} + +static void virtio_ccw_reset(DeviceState *d) +{ + VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); + VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); + + virtio_ccw_reset_virtio(dev, vdev); + css_reset_sch(dev->sch); +} + +static void virtio_ccw_vmstate_change(DeviceState *d, bool running) +{ + VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); + + if (running) { + virtio_ccw_start_ioeventfd(dev); + } else { + virtio_ccw_stop_ioeventfd(dev); + } +} + +static bool virtio_ccw_query_guest_notifiers(DeviceState *d) +{ + VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); + + return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA); +} + +static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign) +{ + VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); + + /* Stop using the generic ioeventfd, we are doing eventfd handling + * ourselves below */ + dev->ioeventfd_disabled = assign; + if (assign) { + virtio_ccw_stop_ioeventfd(dev); + } + return virtio_ccw_set_guest2host_notifier(dev, n, assign, false); +} + +static int virtio_ccw_get_mappings(VirtioCcwDevice *dev) +{ + int r; + + if (!dev->sch->thinint_active) { + return -EINVAL; + } + + r = map_indicator(&dev->routes.adapter, dev->summary_indicator); + if (r) { + return r; + } + r = map_indicator(&dev->routes.adapter, dev->indicators); + if (r) { + return r; + } + dev->routes.adapter.summary_addr = dev->summary_indicator->map; + dev->routes.adapter.ind_addr = dev->indicators->map; + + return 0; +} + +static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs) +{ + int i; + VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); + int ret; + S390FLICState *fs = s390_get_flic(); + S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); + + ret = virtio_ccw_get_mappings(dev); + if (ret) { + return ret; + } + for (i = 0; i < nvqs; i++) { + if (!virtio_queue_get_num(vdev, i)) { + break; + } + } + dev->routes.num_routes = i; + return fsc->add_adapter_routes(fs, &dev->routes); +} + +static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs) +{ + S390FLICState *fs = s390_get_flic(); + S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); + + fsc->release_adapter_routes(fs, &dev->routes); +} + +static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n) +{ + VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); + VirtQueue *vq = virtio_get_queue(vdev, n); + EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); + + return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, notifier, NULL, + dev->routes.gsi[n]); +} + +static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n) +{ + VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); + VirtQueue *vq = virtio_get_queue(vdev, n); + EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); + int ret; + + ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, notifier, + dev->routes.gsi[n]); + assert(ret == 0); +} + +static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n, + bool assign, bool with_irqfd) +{ + VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); + VirtQueue *vq = virtio_get_queue(vdev, n); + EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); + VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); + + if (assign) { + int r = event_notifier_init(notifier, 0); + + if (r < 0) { + return r; + } + virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); + if (with_irqfd) { + r = virtio_ccw_add_irqfd(dev, n); + if (r) { + virtio_queue_set_guest_notifier_fd_handler(vq, false, + with_irqfd); + return r; + } + } + /* + * We do not support individual masking for channel devices, so we + * need to manually trigger any guest masking callbacks here. + */ + if (k->guest_notifier_mask) { + k->guest_notifier_mask(vdev, n, false); + } + /* get lost events and re-inject */ + if (k->guest_notifier_pending && + k->guest_notifier_pending(vdev, n)) { + event_notifier_set(notifier); + } + } else { + if (k->guest_notifier_mask) { + k->guest_notifier_mask(vdev, n, true); + } + if (with_irqfd) { + virtio_ccw_remove_irqfd(dev, n); + } + virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); + event_notifier_cleanup(notifier); + } + return 0; +} + +static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs, + bool assigned) +{ + VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); + VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); + bool with_irqfd = dev->sch->thinint_active && kvm_irqfds_enabled(); + int r, n; + + if (with_irqfd && assigned) { + /* irq routes need to be set up before assigning irqfds */ + r = virtio_ccw_setup_irqroutes(dev, nvqs); + if (r < 0) { + goto irqroute_error; + } + } + for (n = 0; n < nvqs; n++) { + if (!virtio_queue_get_num(vdev, n)) { + break; + } + r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd); + if (r < 0) { + goto assign_error; + } + } + if (with_irqfd && !assigned) { + /* release irq routes after irqfds have been released */ + virtio_ccw_release_irqroutes(dev, nvqs); + } + return 0; + +assign_error: + while (--n >= 0) { + virtio_ccw_set_guest_notifier(dev, n, !assigned, false); + } +irqroute_error: + if (with_irqfd && assigned) { + virtio_ccw_release_irqroutes(dev, nvqs); + } + return r; +} + +static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f) +{ + VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); + VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); + + qemu_put_be16(f, virtio_queue_vector(vdev, n)); +} + +static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f) +{ + VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); + VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); + uint16_t vector; + + qemu_get_be16s(f, &vector); + virtio_queue_set_vector(vdev, n , vector); + + return 0; +} + +static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f) +{ + VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); + SubchDev *s = dev->sch; + VirtIODevice *vdev = virtio_ccw_get_vdev(s); + + subch_device_save(s, f); + if (dev->indicators != NULL) { + qemu_put_be32(f, dev->indicators->len); + qemu_put_be64(f, dev->indicators->addr); + } else { + qemu_put_be32(f, 0); + qemu_put_be64(f, 0UL); + } + if (dev->indicators2 != NULL) { + qemu_put_be32(f, dev->indicators2->len); + qemu_put_be64(f, dev->indicators2->addr); + } else { + qemu_put_be32(f, 0); + qemu_put_be64(f, 0UL); + } + if (dev->summary_indicator != NULL) { + qemu_put_be32(f, dev->summary_indicator->len); + qemu_put_be64(f, dev->summary_indicator->addr); + } else { + qemu_put_be32(f, 0); + qemu_put_be64(f, 0UL); + } + qemu_put_be16(f, vdev->config_vector); + qemu_put_be64(f, dev->routes.adapter.ind_offset); + qemu_put_byte(f, dev->thinint_isc); + qemu_put_be32(f, dev->revision); +} + +static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f) +{ + VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); + SubchDev *s = dev->sch; + VirtIODevice *vdev = virtio_ccw_get_vdev(s); + int len; + + s->driver_data = dev; + subch_device_load(s, f); + len = qemu_get_be32(f); + if (len != 0) { + dev->indicators = get_indicator(qemu_get_be64(f), len); + } else { + qemu_get_be64(f); + dev->indicators = NULL; + } + len = qemu_get_be32(f); + if (len != 0) { + dev->indicators2 = get_indicator(qemu_get_be64(f), len); + } else { + qemu_get_be64(f); + dev->indicators2 = NULL; + } + len = qemu_get_be32(f); + if (len != 0) { + dev->summary_indicator = get_indicator(qemu_get_be64(f), len); + } else { + qemu_get_be64(f); + dev->summary_indicator = NULL; + } + qemu_get_be16s(f, &vdev->config_vector); + dev->routes.adapter.ind_offset = qemu_get_be64(f); + dev->thinint_isc = qemu_get_byte(f); + dev->revision = qemu_get_be32(f); + if (s->thinint_active) { + return css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, + dev->thinint_isc, true, false, + &dev->routes.adapter.adapter_id); + } + + return 0; +} + +/* This is called by virtio-bus just after the device is plugged. */ +static void virtio_ccw_device_plugged(DeviceState *d, Error **errp) +{ + VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); + VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); + SubchDev *sch = dev->sch; + int n = virtio_get_num_queues(vdev); + + if (virtio_get_num_queues(vdev) > VIRTIO_CCW_QUEUE_MAX) { + error_setg(errp, "The nubmer of virtqueues %d " + "exceeds ccw limit %d", n, + VIRTIO_CCW_QUEUE_MAX); + return; + } + + if (!kvm_eventfds_enabled()) { + dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD; + } + + sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus); + + if (dev->max_rev >= 1) { + virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1); + } + + css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, + d->hotplugged, 1); +} + +static void virtio_ccw_post_plugged(DeviceState *d, Error **errp) +{ + VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); + VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); + + if (!virtio_host_has_feature(vdev, VIRTIO_F_VERSION_1)) { + /* A backend didn't support modern virtio. */ + dev->max_rev = 0; + } +} + +static void virtio_ccw_device_unplugged(DeviceState *d) +{ + VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); + + virtio_ccw_stop_ioeventfd(dev); +} +/**************** Virtio-ccw Bus Device Descriptions *******************/ + +static Property virtio_ccw_net_properties[] = { + DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), + DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, + VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), + DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, + VIRTIO_CCW_MAX_REV), + DEFINE_PROP_END_OF_LIST(), +}; + +static void virtio_ccw_net_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); + + k->realize = virtio_ccw_net_realize; + k->exit = virtio_ccw_exit; + dc->reset = virtio_ccw_reset; + dc->props = virtio_ccw_net_properties; + set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); +} + +static const TypeInfo virtio_ccw_net = { + .name = TYPE_VIRTIO_NET_CCW, + .parent = TYPE_VIRTIO_CCW_DEVICE, + .instance_size = sizeof(VirtIONetCcw), + .instance_init = virtio_ccw_net_instance_init, + .class_init = virtio_ccw_net_class_init, +}; + +static Property virtio_ccw_blk_properties[] = { + DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), + DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, + VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), + DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, + VIRTIO_CCW_MAX_REV), + DEFINE_PROP_END_OF_LIST(), +}; + +static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); + + k->realize = virtio_ccw_blk_realize; + k->exit = virtio_ccw_exit; + dc->reset = virtio_ccw_reset; + dc->props = virtio_ccw_blk_properties; + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); +} + +static const TypeInfo virtio_ccw_blk = { + .name = TYPE_VIRTIO_BLK_CCW, + .parent = TYPE_VIRTIO_CCW_DEVICE, + .instance_size = sizeof(VirtIOBlkCcw), + .instance_init = virtio_ccw_blk_instance_init, + .class_init = virtio_ccw_blk_class_init, +}; + +static Property virtio_ccw_serial_properties[] = { + DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), + DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, + VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), + DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, + VIRTIO_CCW_MAX_REV), + DEFINE_PROP_END_OF_LIST(), +}; + +static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); + + k->realize = virtio_ccw_serial_realize; + k->exit = virtio_ccw_exit; + dc->reset = virtio_ccw_reset; + dc->props = virtio_ccw_serial_properties; + set_bit(DEVICE_CATEGORY_INPUT, dc->categories); +} + +static const TypeInfo virtio_ccw_serial = { + .name = TYPE_VIRTIO_SERIAL_CCW, + .parent = TYPE_VIRTIO_CCW_DEVICE, + .instance_size = sizeof(VirtioSerialCcw), + .instance_init = virtio_ccw_serial_instance_init, + .class_init = virtio_ccw_serial_class_init, +}; + +static Property virtio_ccw_balloon_properties[] = { + DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), + DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, + VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), + DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, + VIRTIO_CCW_MAX_REV), + DEFINE_PROP_END_OF_LIST(), +}; + +static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); + + k->realize = virtio_ccw_balloon_realize; + k->exit = virtio_ccw_exit; + dc->reset = virtio_ccw_reset; + dc->props = virtio_ccw_balloon_properties; + set_bit(DEVICE_CATEGORY_MISC, dc->categories); +} + +static const TypeInfo virtio_ccw_balloon = { + .name = TYPE_VIRTIO_BALLOON_CCW, + .parent = TYPE_VIRTIO_CCW_DEVICE, + .instance_size = sizeof(VirtIOBalloonCcw), + .instance_init = virtio_ccw_balloon_instance_init, + .class_init = virtio_ccw_balloon_class_init, +}; + +static Property virtio_ccw_scsi_properties[] = { + DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), + DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, + VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), + DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, + VIRTIO_CCW_MAX_REV), + DEFINE_PROP_END_OF_LIST(), +}; + +static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); + + k->realize = virtio_ccw_scsi_realize; + k->exit = virtio_ccw_exit; + dc->reset = virtio_ccw_reset; + dc->props = virtio_ccw_scsi_properties; + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); +} + +static const TypeInfo virtio_ccw_scsi = { + .name = TYPE_VIRTIO_SCSI_CCW, + .parent = TYPE_VIRTIO_CCW_DEVICE, + .instance_size = sizeof(VirtIOSCSICcw), + .instance_init = virtio_ccw_scsi_instance_init, + .class_init = virtio_ccw_scsi_class_init, +}; + +#ifdef CONFIG_VHOST_SCSI +static Property vhost_ccw_scsi_properties[] = { + DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), + DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, + VIRTIO_CCW_MAX_REV), + DEFINE_PROP_END_OF_LIST(), +}; + +static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); + + k->realize = vhost_ccw_scsi_realize; + k->exit = virtio_ccw_exit; + dc->reset = virtio_ccw_reset; + dc->props = vhost_ccw_scsi_properties; + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); +} + +static const TypeInfo vhost_ccw_scsi = { + .name = TYPE_VHOST_SCSI_CCW, + .parent = TYPE_VIRTIO_CCW_DEVICE, + .instance_size = sizeof(VHostSCSICcw), + .instance_init = vhost_ccw_scsi_instance_init, + .class_init = vhost_ccw_scsi_class_init, +}; +#endif + +static void virtio_ccw_rng_instance_init(Object *obj) +{ + VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj); + + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VIRTIO_RNG); + object_property_add_alias(obj, "rng", OBJECT(&dev->vdev), + "rng", &error_abort); +} + +static Property virtio_ccw_rng_properties[] = { + DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), + DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, + VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), + DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, + VIRTIO_CCW_MAX_REV), + DEFINE_PROP_END_OF_LIST(), +}; + +static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); + + k->realize = virtio_ccw_rng_realize; + k->exit = virtio_ccw_exit; + dc->reset = virtio_ccw_reset; + dc->props = virtio_ccw_rng_properties; + set_bit(DEVICE_CATEGORY_MISC, dc->categories); +} + +static const TypeInfo virtio_ccw_rng = { + .name = TYPE_VIRTIO_RNG_CCW, + .parent = TYPE_VIRTIO_CCW_DEVICE, + .instance_size = sizeof(VirtIORNGCcw), + .instance_init = virtio_ccw_rng_instance_init, + .class_init = virtio_ccw_rng_class_init, +}; + +static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp) +{ + VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; + + virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev); + virtio_ccw_device_realize(_dev, errp); +} + +static int virtio_ccw_busdev_exit(DeviceState *dev) +{ + VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; + VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev); + + return _info->exit(_dev); +} + +static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev, + DeviceState *dev, Error **errp) +{ + VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; + SubchDev *sch = _dev->sch; + + virtio_ccw_stop_ioeventfd(_dev); + + /* + * We should arrive here only for device_del, since we don't support + * direct hot(un)plug of channels, but only through virtio. + */ + assert(sch != NULL); + /* Subchannel is now disabled and no longer valid. */ + sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA | + PMCW_FLAGS_MASK_DNV); + + css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0); + + object_unparent(OBJECT(dev)); +} + +static void virtio_ccw_device_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = virtio_ccw_busdev_realize; + dc->exit = virtio_ccw_busdev_exit; + dc->bus_type = TYPE_VIRTUAL_CSS_BUS; +} + +static const TypeInfo virtio_ccw_device_info = { + .name = TYPE_VIRTIO_CCW_DEVICE, + .parent = TYPE_DEVICE, + .instance_size = sizeof(VirtioCcwDevice), + .class_init = virtio_ccw_device_class_init, + .class_size = sizeof(VirtIOCCWDeviceClass), + .abstract = true, +}; + +/***************** Virtual-css Bus Bridge Device ********************/ +/* Only required to have the virtio bus as child in the system bus */ + +static int virtual_css_bridge_init(SysBusDevice *dev) +{ + /* nothing */ + return 0; +} + +static void virtual_css_bridge_class_init(ObjectClass *klass, void *data) +{ + SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); + HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); + DeviceClass *dc = DEVICE_CLASS(klass); + + k->init = virtual_css_bridge_init; + hc->unplug = virtio_ccw_busdev_unplug; + set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); +} + +static const TypeInfo virtual_css_bridge_info = { + .name = "virtual-css-bridge", + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(SysBusDevice), + .class_init = virtual_css_bridge_class_init, + .interfaces = (InterfaceInfo[]) { + { TYPE_HOTPLUG_HANDLER }, + { } + } +}; + +/* virtio-ccw-bus */ + +static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, + VirtioCcwDevice *dev) +{ + DeviceState *qdev = DEVICE(dev); + char virtio_bus_name[] = "virtio-bus"; + + qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS, + qdev, virtio_bus_name); +} + +static void virtio_ccw_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_ccw_notify; + k->vmstate_change = virtio_ccw_vmstate_change; + k->query_guest_notifiers = virtio_ccw_query_guest_notifiers; + k->set_host_notifier = virtio_ccw_set_host_notifier; + k->set_guest_notifiers = virtio_ccw_set_guest_notifiers; + k->save_queue = virtio_ccw_save_queue; + k->load_queue = virtio_ccw_load_queue; + k->save_config = virtio_ccw_save_config; + k->load_config = virtio_ccw_load_config; + k->device_plugged = virtio_ccw_device_plugged; + k->post_plugged = virtio_ccw_post_plugged; + k->device_unplugged = virtio_ccw_device_unplugged; +} + +static const TypeInfo virtio_ccw_bus_info = { + .name = TYPE_VIRTIO_CCW_BUS, + .parent = TYPE_VIRTIO_BUS, + .instance_size = sizeof(VirtioCcwBusState), + .class_init = virtio_ccw_bus_class_init, +}; + +#ifdef CONFIG_VIRTFS +static Property virtio_ccw_9p_properties[] = { + DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), + DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, + VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), + DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, + VIRTIO_CCW_MAX_REV), + DEFINE_PROP_END_OF_LIST(), +}; + +static void virtio_ccw_9p_realize(VirtioCcwDevice *ccw_dev, Error **errp) +{ + V9fsCCWState *dev = VIRTIO_9P_CCW(ccw_dev); + DeviceState *vdev = DEVICE(&dev->vdev); + Error *err = NULL; + + qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); + object_property_set_bool(OBJECT(vdev), true, "realized", &err); + if (err) { + error_propagate(errp, err); + } +} + +static void virtio_ccw_9p_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); + + k->exit = virtio_ccw_exit; + k->realize = virtio_ccw_9p_realize; + dc->reset = virtio_ccw_reset; + dc->props = virtio_ccw_9p_properties; + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); +} + +static void virtio_ccw_9p_instance_init(Object *obj) +{ + V9fsCCWState *dev = VIRTIO_9P_CCW(obj); + + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VIRTIO_9P); +} + +static const TypeInfo virtio_ccw_9p_info = { + .name = TYPE_VIRTIO_9P_CCW, + .parent = TYPE_VIRTIO_CCW_DEVICE, + .instance_size = sizeof(V9fsCCWState), + .instance_init = virtio_ccw_9p_instance_init, + .class_init = virtio_ccw_9p_class_init, +}; +#endif + +static void virtio_ccw_register(void) +{ + type_register_static(&virtio_ccw_bus_info); + type_register_static(&virtual_css_bus_info); + type_register_static(&virtio_ccw_device_info); + type_register_static(&virtio_ccw_serial); + type_register_static(&virtio_ccw_blk); + type_register_static(&virtio_ccw_net); + type_register_static(&virtio_ccw_balloon); + type_register_static(&virtio_ccw_scsi); +#ifdef CONFIG_VHOST_SCSI + type_register_static(&vhost_ccw_scsi); +#endif + type_register_static(&virtio_ccw_rng); + type_register_static(&virtual_css_bridge_info); +#ifdef CONFIG_VIRTFS + type_register_static(&virtio_ccw_9p_info); +#endif +} + +type_init(virtio_ccw_register) |
