STRUCT MOST_CHANNEL_CAPABILITY(9)

💅 NAME

okay so bestie, gather round: this is struct most_channel_capability — literally the Channel capability struct, and she is the main character of this page. We're deep in the Kernel API Manual 🎀 so buckle up.

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✨ SYNOPSIS

struct most_channel_capability {
    u16 direction;
    u16 data_type;
    u16 num_buffers_packet;
    u16 buffer_size_packet;
    u16 num_buffers_streaming;
    u16 buffer_size_streaming;
    const char *name_suffix;
 };

yes bestie, that's the whole vibe. copy it exactly, don't get creative 🙈

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🫶 Members

• direction — the supported channel directions, no cap. it's a bitwise OR-combination of the values from the enumeration most_channel_direction. and listen — zero is an allowed value and it means "channel may not be used" 💀 so if you see a zero, that channel is literally not invited to the party.
• data_type — the supported channel data types ✨. again, bitwise OR-combination of the values from the enumeration most_channel_data_type. zero is allowed here too, and same energy: "channel may not be used".
• num_buffers_packet — the maximum number of buffers this channel supports for packet data types (Async,Control,QoS). that's the packet girlies' buffer budget 🔥.
• buffer_size_packet — the maximum buffer size this channel supports for packet data types (Async,Control,QoS). how big each one can be, periodt.
• num_buffers_streaming — the maximum number of buffers this channel supports for streaming data types (Sync,AV Packetized). different data types, different budget, we love range 💜.
• buffer_size_streaming — the maximum buffer size this channel supports for streaming data types (Sync,AV Packetized). yes bestie, streaming gets her own size limit too.
• name_suffix — an optional suffix provided by an HDM that gets attached to the regular channel name 🎀. like a little accessory. iconic.

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🌸 Description

so this struct describes the capabilities of a MOST channel — things like supported Data Types and directions, iykyk. this info is provided by an HDM for the MostCore 🦋.

then the Core creates read only sysfs attribute files in /sys/devices/most/mdev#/<channel>/ with the following attributes:

• -available_directions
• -available_datatypes
• -number_of_packet_buffers
• -number_of_stream_buffers
• -size_of_packet_buffer
• -size_of_stream_buffer

and ngl the content of each file is a string with all the supported properties of this very channel attribute. cute, consistent, slay 💅

lowkey reminder: read only. you're admiring the attributes, not editing them. hands off bestie 🫶

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👑 SEE ALSO

Kernel file ./include/linux/most.h plus all these besties:

• enum most_interface_type(9)
• enum most_channel_direction(9)
• enum most_channel_data_type(9)
• struct most_channel_config(9)
• struct most_interface(9)
• struct most_component(9)
• most_register_interface(9)
• most_deregister_interface(9)
• most_stop_enqueue(9)
• most_resume_enqueue(9)

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okay that's the whole page bestie, go be iconic with your channel capabilities 🌈✨

signed, sealed, delivered from ./include/linux — October 2026 — and yeah, the footer still says struct most_...l_capability(9) because some things are simply too iconic to abbreviate properly 💅💖