ENUM IPA_SEQ_TYPE(9)

💖 enum ipa_seq_type(9) 💖

okay so bestie, this is enum ipa_seq_type straight out of the Kernel API Manual — like, the actual kernel docs, we're fancy now 👑 — and it's all about the HPS and DPS sequencer type. slay.

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✨ SYNOPSIS ✨

enum ipa_seq_type {
    IPA_SEQ_DMA ,
    IPA_SEQ_1_PASS ,
    IPA_SEQ_2_PASS_SKIP_LAST_UC ,
    IPA_SEQ_1_PASS_SKIP_LAST_UC ,
    IPA_SEQ_2_PASS ,
    IPA_SEQ_3_PASS_SKIP_LAST_UC ,
    IPA_SEQ_DECIPHER

};

like, that's the whole squad right there 🫶

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🌸 DESCRIPTION 🌸

So here's the vibe: the low-order byte of the sequencer type register is the main character here — it defines the number of passes a packet takes through the IPA pipeline 🔥

And the last pass through can optionally skip the microprocessor. no cap.

Deciphering is optional for all types too — and if you enable it, an additional mask (two bits) gets added to the type value. cute little bonus bits ✨

🎀 Constants 🎀

• IPA_SEQ_DMA — Perform DMA only, that's it, that's the whole job 💅
• IPA_SEQ_1_PASS — One pass through the pipeline ⭐
• IPA_SEQ_2_PASS_SKIP_LAST_UC — Two passes, and we skip the microcprocessor 🙈
• IPA_SEQ_1_PASS_SKIP_LAST_UC — One pass, also skipping the microcprocessor 🦋
• IPA_SEQ_2_PASS — Two passes through the pipeline, full send 🌈
• IPA_SEQ_3_PASS_SKIP_LAST_UC — Three passes, and yeah, microcprocessor gets skipped 💜
• IPA_SEQ_DECIPHER — Optional deciphering step, but like, combined 🧚

⚠️ Note: not all combinations of ipa_seq_type and ipa_seq_rep_type are supported (or meaningful). so like, don't just mix and match and expect magic, bestie 😭

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👀 SEE ALSO 👀

• Kernel file ./drivers/net/ipa/ipa_reg.h — IPA Registers(9)
• enum ipa_seq_rep_type(9)
• enum ipa_irq_id(9)

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and that's the whole page, periodt 🎀 this iconic little slice of kernel lore lives in ./drivers/net/ipa and it's dated October 2026 — go read the source, iykyk 💖✨