libnvme(9) API Manual libnvme(9)

# [NAME](#NAME)

struct nvme\_mi\_vpd\_usce - Upstream Connector Element Descriptor

# [SYNOPSIS](#SYNOPSIS)

struct nvme\_mi\_vpd\_usce {  
**\_\_u8 typ;**  
**\_\_u8 rev;**  
**\_\_u8 len;**  
**\_\_u8 ff;**  
**\_\_u8 lptr;**  
**\_\_u8 rsvd6\[2];**  
**\_\_u8 maxapwr;**  
**\_\_le16 maxpwr;**  
**\_\_u8 updc;**  
**\_\_u8 upd\[];**  
};

# [Members](#Members)

[typ](#typ)

Type: set to NVME\_MI\_ELEM\_USCE.

[rev](#rev)

Revision: cleared to 0h.

[len](#len)

Length of this Upstream Connector Element Descriptor in bytes.

[ff](#ff)

Form Factor of the NVMe Storage Device, see *enum* *nvme\_mi\_form\_factor*.

[lptr](#lptr)

Label Pointer: index of the Label Element Descriptor containing this Upstream Connector's label, if any. A value of 0h indicates there is no associated label.

[rsvd6](#rsvd6)

Reserved

[maxapwr](#maxapwr)

Maximum Auxiliary Power in 10 mW increments consumed by the NVMe Storage Device from this Upstream Connector. A value of 0h indicates auxiliary power is not used.

[maxpwr](#maxpwr)

Maximum Power in Watts consumed by the NVMe Storage Device.

[updc](#updc)

Upstream Port Descriptor Count: number of Upstream Port Descriptors in *upd*.

[upd](#upd)

Upstream Port Descriptor list. Each entry's size is implementation specific; use *len* and *updc* to walk the list.

struct nvme\_mi\_vpd\_usce October 2026

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Document: nvme_mi_vpd_usce-libnvme3(2) from nvme-cli 3.2-r0 (Chainguard OS)
Source: https://github.com/linux-nvme/nvme-cli