ishtp_cl_alloc_dma_buf(9)

🌸 ishtp_cl_alloc_dma_buf 💅

okay bestie, welcome to the Kernel API Manual — yes, this is a real page from the grown-up kernel docs and yes, we're gonna make it make sense 🫶

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✨ NAME ✨

ishtp_cl_alloc_dma_buf — the function that grabs you your DMA RX and TX buffers, no cap 🎀

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🦋 SYNOPSIS 🦋

void    ishtp_cl_alloc_dma_buf (struct ishtp_device *dev );

like, that's it. one argument. she's lowkey minimal 💜

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⭐ ARGUMENTS ⭐

• dev — the ishtp device 💖 this is the one and only thing you hand her.

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👑 DESCRIPTION 👑

so the whole vibe here is: you call this once during bus setup and it allocates both the RX and TX DMA buffer for you. one and done, periodt ✨

it allocates 1MB, and that RX + TX DMA buffer gets divided into slots 🎀 that's the whole thing. that's the function. iconic behavior honestly 🌈

ngl, "once during bus setup" is doing a lot of work in that sentence — that's the documented usage, so don't go calling it whenever you feel like it 🙈

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🔥 SEE ALSO 🔥

• the kernel file ./drivers/hid/intel-ish-hid/ishtp/dma-if.c — go read her, she's the main character 💅
• ishtp_cl_free_dma_buf(9) — the one who cleans up after this one 🧚 (iykyk)

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and that's the page, bestie!! 🍓 sign-off time: this little gem lives in ./drivers/hid/intel-ish-hid/ishtp, dated October 2026, and it's the ishtp_cl_alloc_dma_buf(9) page you just read 💖 slay 💖