IPA GSI CONFIGURATION DATA(9)

💅 IPA/GSI Configuration Data — man section 9, kernel API manual ✨

okay bestie, so this is the whole vibe of the IPA/GSI configuration data page, straight from the kernel API manual 🎀

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🌸 the actual tea (NAME)

Boot-time configuration data is what we use to define the configuration of the IPA and GSI resources for a given platform. Like, it's the blueprint, and it's giving main character energy ✨

This data gets supplied via the Device Tree match table, associated with a particular compatible string. And what it defines is, like, information about how resources, endpoints and channels, memory, power and so on are allocated and used for the platform 🫶

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💜 resources, explained

Resources are data structures used internally by the IPA hardware. The configuration data defines the number (or limits of the number) of various types of these resources. no cap 💅

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🦋 endpoint configuration data

Endpoint configuration data defines properties of both IPA endpoints and GSI channels. Let's break it down:

• A channel is a GSI construct, and it represents a single communication path between the IPA and a particular execution environment (EE), such as the AP or Modem.
• Each EE has a set of channels associated with it, and each channel has an ID unique for that EE.
• For the most part, the only GSI channels of concern to this driver belong to the AP.

An endpoint is an IPA construct representing a single channel anywhere in the system. An IPA endpoint ID maps directly to an (EE, channel_id) pair. Generally this driver is concerned with only endpoints associated with the AP — however, this will change when support for routing (etc.) is added, so jot that down 📝

IPA endpoint and GSI channel configuration data are defined together, establishing the endpoint_id->(EE, channel_id) mapping. iconic 🔥

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🎀 the three parts of endpoint config data

Endpoint configuration data consists of three parts, and yes, we're listing all three because we don't skip:

1. Properties that are common to IPA and GSI — that's the EE ID, channel ID, endpoint ID, and direction.
2. Properties associated with the GSI channel.
3. Properties associated with the IPA endpoint.

periodt 💅

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✨ SEE ALSO ✨

okay so go read these too, they're literally all in the kernel file ./drivers/net/ipa/ipa_data.h:

• struct ipa_qsb_data(9)
• struct gsi_channel_data(9)
• struct ipa_endpoint_data(9)
• struct ipa_gsi_endpoint_data(9)
• struct ipa_resource_limits(9)
• struct ipa_resource(9)
• struct ipa_resource_data(9)
• struct ipa_mem_data(9)
• struct ipa_interconnect_data(9)
• struct ipa_power_data(9)
• struct ipa_data(9)

iykyk 🌈

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bestie heads up: this page lives at ./drivers/net/ipa, and the footer says October 2026 — so that's the date stamp on this whole IPA/GSI Configuration Data(9) situation. bye, ily, go read your structs 💖🧚‍♀️