| /* |
| * QEMU NVM Express Subsystem: nvme-subsys |
| * |
| * Copyright (c) 2021 Minwoo Im <minwoo.im.dev@gmail.com> |
| * |
| * This code is licensed under the GNU GPL v2. Refer COPYING. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qapi/error.h" |
| |
| #include "nvme.h" |
| |
| int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp) |
| { |
| NvmeSubsystem *subsys = n->subsys; |
| int cntlid, nsid; |
| |
| for (cntlid = 0; cntlid < ARRAY_SIZE(subsys->ctrls); cntlid++) { |
| if (!subsys->ctrls[cntlid]) { |
| break; |
| } |
| } |
| |
| if (cntlid == ARRAY_SIZE(subsys->ctrls)) { |
| error_setg(errp, "no more free controller id"); |
| return -1; |
| } |
| |
| subsys->ctrls[cntlid] = n; |
| |
| for (nsid = 1; nsid < ARRAY_SIZE(subsys->namespaces); nsid++) { |
| NvmeNamespace *ns = subsys->namespaces[nsid]; |
| if (ns && ns->params.shared && !ns->params.detached) { |
| nvme_attach_ns(n, ns); |
| } |
| } |
| |
| return cntlid; |
| } |
| |
| void nvme_subsys_unregister_ctrl(NvmeSubsystem *subsys, NvmeCtrl *n) |
| { |
| subsys->ctrls[n->cntlid] = NULL; |
| n->cntlid = -1; |
| } |
| |
| static void nvme_subsys_setup(NvmeSubsystem *subsys) |
| { |
| const char *nqn = subsys->params.nqn ? |
| subsys->params.nqn : subsys->parent_obj.id; |
| |
| snprintf((char *)subsys->subnqn, sizeof(subsys->subnqn), |
| "nqn.2019-08.org.qemu:%s", nqn); |
| } |
| |
| static void nvme_subsys_realize(DeviceState *dev, Error **errp) |
| { |
| NvmeSubsystem *subsys = NVME_SUBSYS(dev); |
| |
| qbus_init(&subsys->bus, sizeof(NvmeBus), TYPE_NVME_BUS, dev, dev->id); |
| |
| nvme_subsys_setup(subsys); |
| } |
| |
| static Property nvme_subsystem_props[] = { |
| DEFINE_PROP_STRING("nqn", NvmeSubsystem, params.nqn), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static void nvme_subsys_class_init(ObjectClass *oc, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(oc); |
| |
| set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); |
| |
| dc->realize = nvme_subsys_realize; |
| dc->desc = "Virtual NVMe subsystem"; |
| dc->hotpluggable = false; |
| |
| device_class_set_props(dc, nvme_subsystem_props); |
| } |
| |
| static const TypeInfo nvme_subsys_info = { |
| .name = TYPE_NVME_SUBSYS, |
| .parent = TYPE_DEVICE, |
| .class_init = nvme_subsys_class_init, |
| .instance_size = sizeof(NvmeSubsystem), |
| }; |
| |
| static void nvme_subsys_register_types(void) |
| { |
| type_register_static(&nvme_subsys_info); |
| } |
| |
| type_init(nvme_subsys_register_types) |