LXR qemu/hw/block/nvme-subsys.c

   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/units.h"
  10#include "qemu/osdep.h"
  11#include "qemu/uuid.h"
  12#include "qemu/iov.h"
  13#include "qemu/cutils.h"
  14#include "qapi/error.h"
  15#include "hw/qdev-properties.h"
  16#include "hw/qdev-core.h"
  17#include "hw/block/block.h"
  18#include "block/aio.h"
  19#include "block/accounting.h"
  20#include "sysemu/sysemu.h"
  21#include "hw/pci/pci.h"
  22#include "nvme.h"
  23#include "nvme-subsys.h"
  24
  25int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp)
  26{
  27    NvmeSubsystem *subsys = n->subsys;
  28    int cntlid;
  29
  30    for (cntlid = 0; cntlid < ARRAY_SIZE(subsys->ctrls); cntlid++) {
  31        if (!subsys->ctrls[cntlid]) {
  32            break;
  33        }
  34    }
  35
  36    if (cntlid == ARRAY_SIZE(subsys->ctrls)) {
  37        error_setg(errp, "no more free controller id");
  38        return -1;
  39    }
  40
  41    subsys->ctrls[cntlid] = n;
  42
  43    return cntlid;
  44}
  45
  46static void nvme_subsys_setup(NvmeSubsystem *subsys)
  47{
  48    const char *nqn = subsys->params.nqn ?
  49        subsys->params.nqn : subsys->parent_obj.id;
  50
  51    snprintf((char *)subsys->subnqn, sizeof(subsys->subnqn),
  52             "nqn.2019-08.org.qemu:%s", nqn);
  53}
  54
  55static void nvme_subsys_realize(DeviceState *dev, Error **errp)
  56{
  57    NvmeSubsystem *subsys = NVME_SUBSYS(dev);
  58
  59    nvme_subsys_setup(subsys);
  60}
  61
  62static Property nvme_subsystem_props[] = {
  63    DEFINE_PROP_STRING("nqn", NvmeSubsystem, params.nqn),
  64    DEFINE_PROP_END_OF_LIST(),
  65};
  66
  67static void nvme_subsys_class_init(ObjectClass *oc, void *data)
  68{
  69    DeviceClass *dc = DEVICE_CLASS(oc);
  70
  71    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  72
  73    dc->realize = nvme_subsys_realize;
  74    dc->desc = "Virtual NVMe subsystem";
  75
  76    device_class_set_props(dc, nvme_subsystem_props);
  77}
  78
  79static const TypeInfo nvme_subsys_info = {
  80    .name = TYPE_NVME_SUBSYS,
  81    .parent = TYPE_DEVICE,
  82    .class_init = nvme_subsys_class_init,
  83    .instance_size = sizeof(NvmeSubsystem),
  84};
  85
  86static void nvme_subsys_register_types(void)
  87{
  88    type_register_static(&nvme_subsys_info);
  89}
  90
  91type_init(nvme_subsys_register_types)
  92