ppc440spe_c...r_descriptor(9)

💅 ppc440spe_c...r_descriptor(9) — like, the whole vibe

okay so bestie, welcome to the Kernel API Manual ✨ — yes, that's the manual name, we're fancy here. This one's a (9) section page, and the header up top got lowkey chopped to ppc440spe_c...r_descriptor(9) (the kernel's own docs being dramatic and truncating itself, iconic honestly 😭). But the actual star of the show is the function in NAME, so let's go 🫶

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🌸 NAME 🌸

ppc440spe_chan_set_first_xor_descriptor — init XORcore chain ✨

That's it, that's the job. It sets up the first descriptor for the XOR core chain. Slay.

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🎀 SYNOPSIS 🎀

void ppc440spe_chan_set_first_xor_descriptor (struct ppc440spe_adma_chan
*chan , struct ppc440spe_adma_desc_slot *next_desc );

It returns void, so like… nothing comes back. No return value, no drama, no notes. She just does the thing and leaves 💅

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🦋 ARGUMENTS 🦋

Bestie, I have to be so for real with you right now: the manpage genuinely does not describe either of these. Like, the source doc literally says "undescribed". I'm not gonna make stuff up and lie to you — that's not the energy 💀 So here's exactly what we got:

• chan — -- undescribed -- 🙈
• next_desc — -- undescribed -- 🙈

That's the whole tea. If you want the real scoop on what goes in them, the manpage is pointing you at the source file below, iykyk 👑

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🔥 SEE ALSO 🔥

First up, the actual file where this all lives — go read it, it's giving main character energy:

• Kernel file ./drivers/dma/ppc4xx/adma.c

And now… the friend group. The whole squad. Every single one, no cap, in order 👇

• ppc440spe_desc_init_interrupt(9), ppc440spe_desc_init_null_xor(9), ppc440spe_desc_init_xor(9), ppc440spe_desc_init_dma2pq(9), ppc440spe_desc_init_dma01pq(9), ppc440spe_desc_init_dma01pqzero_sum(9), ppc440spe_desc_init_memcpy(9), ppc440spe_desc_set_src_addr(9), ppc440spe_desc_set_src_mult(9), ppc440spe_desc_set_dest_addr(9), ppc440spe_desc_set_byte_count(9), ppc440spe_desc_set_rxor_block_size(9), ppc440spe_desc_set_dcheck(9), ppc440spe_xor_set_link(9), ppc440spe_desc_set_link(9), ppc440spe_desc_get_link(9), ppc440spe_desc_is_aligned(9), ppc440spe_chan_xor_slot_count(9), ppc440spe_dma2_pq_slot_count(9), ppc440spe_adma_device_clear_eot_status(9), ppc440spe_chan_is_busy(9), ppc440spe_dma_put_desc(9), ppc440spe_chan_append(9), ppc440spe_chan_get_current_descriptor(9), ppc440spe_chan_run(9), ppc440spe_can_rxor(9), ppc440spe_get_group_entry(9), ppc440spe_adma_free_slots(9), ppc440spe_adma_run_tx_complete_actions(9), ppc440spe_adma_clean_slot(9), __ppc440spe_adma_slot_cleanup(9), ppc440spe_adma_tasklet(9), ppc440spe_adma_slot_cleanup(9), ppc440spe_adma_alloc_slots(9), ppc440spe_adma_alloc_chan_resources(9), ppc440spe_rxor_set_src(9), ppc440spe_rxor_set_mult(9), ppc440spe_adma_check_threshold(9), ppc440spe_adma_tx_submit(9), ppc440spe_adma_prep_dma_interrupt(9), ppc440spe_adma_prep_dma_memcpy(9), ppc440spe_adma_prep_dma_xor(9), ppc440spe_adma_init_dma2rxor_slot(9), ppc440spe_dma01_prep_mult(9), ppc440spe_dma01_prep_sum_product(9), ppc440spe_adma_prep_dma_pq(9), ppc440spe_adma_prep_dma_pqzero_sum(9), ppc440spe_adma_prep_dma_xor_zero_sum(9), ppc440spe_adma_set_dest(9), ppc440spe_adma_pq_set_dest(9), ppc440spe_desc_set_xor_src_cnt(9), ppc440spe_adma_pq_set_src(9), ppc440spe_adma_memcpy_xor_set_src(9), ppc440spe_adma_dma2rxor_inc_addr(9), ppc440spe_adma_dma2rxor_prep_src(9), ppc440spe_adma_dma2rxor_set_src(9), ppc440spe_adma_dma2rxor_set_mult(9), ppc440spe_init_rxor_cursor(9), ppc440spe_adma_pq_set_src_mult(9), ppc440spe_adma_free_chan_resources(9), ppc440spe_adma_tx_status(9), ppc440spe_adma_eot_handler(9), ppc440spe_adma_err_handler(9), ppc440spe_test_callback(9), ppc440spe_adma_issue_pending(9), ppc440spe_chan_start_null_xor(9), ppc440spe_test_raid6(9), ppc440spe_adma_probe(9), ppc440spe_adma_remove(9)

Like I said — the whole squad 😤💖

Heads up bestie: the manpage gives you two arguments and zero description for either of them. If you're shipping anything real, go straight to ./drivers/dma/ppc4xx/adma.c and don't @ me 🌈

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🧚 sign-off 🧚

That's the page!! Source location on the tin is ./drivers/dma/ppc4xx, and this lil doc is dated October 2026 ⭐ Go forth, init your XORcore chain, be the main character of your DMA driver 💜🎀🦋

periodt ✨