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
  19 typedef struct NvmeCtrl NvmeCtrl;
  20 typedef struct NvmeNamespace NvmeNamespace;
  21 typedef 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
  34 int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp);
  35
  36 static 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  */
  49 static 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 */