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

   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#ifndef NVME_SUBSYS_H
  10#define NVME_SUBSYS_H
  11
  12#define TYPE_NVME_SUBSYS "nvme-subsys"
  13#define NVME_SUBSYS(obj) \
  14    OBJECT_CHECK(NvmeSubsystem, (obj), TYPE_NVME_SUBSYS)
  15
  16#define NVME_SUBSYS_MAX_CTRLS   32
  17#define NVME_MAX_NAMESPACES     256
  18
  19typedef struct NvmeCtrl NvmeCtrl;
  20typedef struct NvmeNamespace NvmeNamespace;
  21typedef struct NvmeSubsystem {
  22    DeviceState parent_obj;
  23    uint8_t     subnqn[256];
  24
  25    NvmeCtrl    *ctrls[NVME_SUBSYS_MAX_CTRLS];
  26    /* Allocated namespaces for this subsystem */
  27    NvmeNamespace *namespaces[NVME_MAX_NAMESPACES + 1];
  28
  29    struct {
  30        char *nqn;
  31    } params;
  32} NvmeSubsystem;
  33
  34int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp);
  35
  36static inline NvmeCtrl *nvme_subsys_ctrl(NvmeSubsystem *subsys,
  37        uint32_t cntlid)
  38{
  39    if (!subsys || cntlid >= NVME_SUBSYS_MAX_CTRLS) {
  40        return NULL;
  41    }
  42
  43    return subsys->ctrls[cntlid];
  44}
  45
  46/*
  47 * Return allocated namespace of the specified nsid in the subsystem.
  48 */
  49static inline NvmeNamespace *nvme_subsys_ns(NvmeSubsystem *subsys,
  50        uint32_t nsid)
  51{
  52    if (!subsys || !nsid || nsid > NVME_MAX_NAMESPACES) {
  53        return NULL;
  54    }
  55
  56    return subsys->namespaces[nsid];
  57}
  58
  59#endif /* NVME_SUBSYS_H */
  60