bam_alloc_chan(9)

💖 bam_alloc_chan — bestie's guide to grabbing DMA channel resources 💖

Okay so first things first, this page lives in the Kernel API Manual, section 9, and the star of the show is bam_alloc_chan(9). Yes that's a mouthful, no we're not changing it, it's iconic 💅

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✨ NAME ✨

bam_alloc_chan — literally just allocates channel resources for a DMA channel. That's the whole vibe. 🎀

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🌸 SYNOPSIS 🌸

int bam_alloc_chan (struct dma_chan *chan );

That's it. One function, one argument, returns an int. Clean. Minimalist. Ate. 🔥

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🦋 ARGUMENTS 🦋

• chan — the channel you're specifying. Your chosen one. The main character channel, if you will 👑

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🧚 DESCRIPTION 🧚

So what does it actually do? It allocates the FIFO descriptor memory. That's it, that's the function. It's giving "small but essential" energy — no cap, without it the rest of the BAM crew can't do their thing 🫶

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💜 SEE ALSO 💜

Okay bestie, buckle up, because the friend group here is HUGE. The kernel file to look at is ./drivers/dma/qcom/bam_dma.c, and here's everyone else in the group chat:

• bam_addr(9)
• bam_reset(9)
• bam_reset_channel(9)
• bam_chan_init_hw(9)
• bam_free_chan(9)
• bam_slave_config(9)
• bam_prep_slave_sg(9)
• bam_dma_terminate_all(9)
• bam_pause(9)
• bam_resume(9)
• process_channel_irqs(9)
• bam_dma_irq(9)
• bam_tx_status(9)
• bam_apply_new_config(9)
• bam_start_dma(9)
• dma_tasklet(9)
• bam_issue_pending(9)
• bam_dma_free_desc(9)
• bam_init(9)

Like I said. Big friend group. Go say hi to all of them 🌈⭐

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ngl if you're reading this you're probably already deep in ./drivers/dma/qcom and honestly? good for you. obsessed 💀💖

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Aaaand that's the page! Sourced from ./drivers/dma/qcom, dated October 2026, filed under bam_alloc_chan(9). Go forth and allocate, bestie — you've got this 🍓🧚‍♀️💖