ppc440spe_dm..._sum_product(9)

📦 version 7.3.1, in nixpkgs unstable

💖 NAME 💖

ppc440spe_dma01_prep_sum_product — okay so this one is the Dx = A*(P+Pxy) + B*(Q+Qxy) operation, and the little plot twist is that the destination is also the source. main character energy tbh ✨

🌸 SYNOPSIS 🌸

struct ppc440spe_adma_desc_slot * ppc440spe_dma01_prep_sum_product
(struct ppc440spe_adma_chan *ppc440spe_chan , dma_addr_t *dst ,
dma_addr_t *src , int src_cnt , const unsigned char *scf , size_t len ,
unsigned long flags );

Like, breathe. It's a lot of words, bestie, but it's just one function returning a struct ppc440spe_adma_desc_slot *. Slay 🫶

🎀 ARGUMENTS 🎀

Not me having to tell you this, but the manual page literally gives us nothing for these. Every single one is marked -- undescribed --. No cap. So here's the full roster, all seven of them, exactly as mysterious as the original says:

  • ppc440spe_chan — -- undescribed -- 🙈
  • dst — -- undescribed -- 🙈
  • src — -- undescribed -- 🙈
  • src_cnt — -- undescribed -- 🙈
  • scf — -- undescribed -- 🙈
  • len — -- undescribed -- 🙈
  • flags — -- undescribed -- 🙈
Bestie, do not come for me about the empty descriptions — that's genuinely what the page says. Seven arguments, seven vibes, zero documentation. It's giving "figure it out yourself" 💀

🦋 SEE ALSO 🦋

The kernel file lives at ./drivers/dma/ppc4xx/adma.c — go read the source, iykyk 👑

And because this function does not roll alone, here's the whole friend group, every single one of them, in order:

✨ that's the whole page, bestie ✨ courtesy of the Kernel API Manual, straight out of ./drivers/dma/ppc4xx, dated October 2026, and answering to the name ppc440spe_dm..._sum_product(9). Obsessed with her, honestly 💅🎀🦋

📦 where this page comes from