1 /* 2 * QEMU NVM Express Subsystem: nvme-subsys 3 * 4 * Copyright (c) 2021 Minwoo Im <minwoo.im.dev@gmail.com> 5 * 6 * This code is licensed under the GNU GPL v2. Refer COPYING. 7 */ 8 9 #include "qemu/osdep.h" 10 #include "qapi/error.h" 11 12 #include "nvme.h" 13 14 int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp) 15 { 16 NvmeSubsystem *subsys = n->subsys; 17 int cntlid; 18 19 for (cntlid = 0; cntlid < ARRAY_SIZE(subsys->ctrls); cntlid++) { 20 if (!subsys->ctrls[cntlid]) { 21 break; 22 } 23 } 24 25 if (cntlid == ARRAY_SIZE(subsys->ctrls)) { 26 error_setg(errp, "no more free controller id"); 27 return -1; 28 } 29 30 subsys->ctrls[cntlid] = n; 31 32 return cntlid; 33 } 34 35 static void nvme_subsys_setup(NvmeSubsystem *subsys) 36 { 37 const char *nqn = subsys->params.nqn ? 38 subsys->params.nqn : subsys->parent_obj.id; 39 40 snprintf((char *)subsys->subnqn, sizeof(subsys->subnqn), 41 "nqn.2019-08.org.qemu:%s", nqn); 42 } 43 44 static void nvme_subsys_realize(DeviceState *dev, Error **errp) 45 { 46 NvmeSubsystem *subsys = NVME_SUBSYS(dev); 47 48 nvme_subsys_setup(subsys); 49 } 50 51 static Property nvme_subsystem_props[] = { 52 DEFINE_PROP_STRING("nqn", NvmeSubsystem, params.nqn), 53 DEFINE_PROP_END_OF_LIST(), 54 }; 55 56 static void nvme_subsys_class_init(ObjectClass *oc, void *data) 57 { 58 DeviceClass *dc = DEVICE_CLASS(oc); 59 60 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 61 62 dc->realize = nvme_subsys_realize; 63 dc->desc = "Virtual NVMe subsystem"; 64 65 device_class_set_props(dc, nvme_subsystem_props); 66 } 67 68 static const TypeInfo nvme_subsys_info = { 69 .name = TYPE_NVME_SUBSYS, 70 .parent = TYPE_DEVICE, 71 .class_init = nvme_subsys_class_init, 72 .instance_size = sizeof(NvmeSubsystem), 73 }; 74 75 static void nvme_subsys_register_types(void) 76 { 77 type_register_static(&nvme_subsys_info); 78 } 79 80 type_init(nvme_subsys_register_types) 81