qcom_prep_adm_dma_desc(9)

💫 qcom_prep_adm_dma_desc(9) — a Kernel API Manual moment ✨

okay so bestie, we're diving into the Kernel API Manual today and honestly? this one's a little icon. it's called qcom_prep_adm_dma_desc, and yes the name is a mouthful but that's just how the kernel rolls 💅

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🌸 NAME 🌸

qcom_prep_adm_dma_desc — bestie, it prepares the descriptor for adma. that's the whole vibe. it's giving "get the paperwork ready before the big thing happens" 📋✨

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🦋 SYNOPSIS 🦋

int qcom_prep_adm_dma_desc (struct qcom_nand_controller *nandc , bool
read , int reg_off , const void *vaddr , int size , bool flow_control );

like, look at all those params. she's got range, no cap 👑

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🎀 ARGUMENTS 🎀

• nandc — the qpic nand controller. that's the main character of this whole situation fr fr 🫶
• read — the read-or-write type. like, are we going in or coming out? we must know 💫
• reg_off — offset within the controller's data buffer. the lil address-y coordinate situation ✨
• vaddr — the virtual address of the buffer we want to write to. literally the destination's whole location, iykyk 📍
• size — the adm dma transaction size in bytes. the bigness of the transfer, measured in bytes obviously 🍓
• flow_control — the flow controller. keeping things moving at a chill pace 🌊

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💜 DESCRIPTION 💜

so what does she actually do? this function will prepare descriptor for adma. that's it. that's the sentence. she prepares the descriptor, she slays, she leaves 🎀✨ no notes, perfection 💅

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🌈 SEE ALSO 🌈

peep the whole friend group 🫶:

• Kernel file ./drivers/mtd/nand/qpic_common.c — literally the source, go look 👀
• qcom_free_bam_transaction(9)
• qcom_alloc_bam_transaction(9)
• qcom_clear_bam_transaction(9)
• qcom_qpic_bam_dma_done(9)
• qcom_nandc_dev_to_mem(9)
• qcom_prepare_bam_async_desc(9)
• qcom_prep_bam_dma_desc_cmd(9)
• qcom_prep_bam_dma_desc_data(9)
• qcom_read_reg_dma(9)
• qcom_write_reg_dma(9)
• qcom_read_data_dma(9)
• qcom_write_data_dma(9)
• qcom_submit_descs(9)
• qcom_clear_read_regs(9)
• qcom_nandc_unalloc(9)
• qcom_nandc_alloc(9)

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aaaand that's the whole page, bestie 💖 shoutout to the source squad over in ./drivers/mtd/nand, timestamped October 2026, and ofc the queen herself qcom_prep_adm_dma_desc(9) — periodt. 🌟👑💜