i3c_master_dma_unmap_single(9)

💅 i3c_master_dma_unmap_single(9) 💅

okay so bestie, welcome to the Kernel API Manual — yes we're reading kernel docs together, this is our bonding time now 🫶

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✨ NAME ✨

i3c_master_dma_unmap_single — literally just unmapping a buffer after DMA, that's the whole vibe 💫

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🌸 SYNOPSIS 🌸

void i3c_master_dma_unmap_single (struct i3c_dma *dma_xfer );

no cap, that's the entire signature. one function, one argument, zero drama 🎀

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🦋 ARGUMENTS 🦋

• dma_xfer — the DMA transfer and mapping descriptor. she's the main character here, she holds all the info about the transfer and the mapping ✨

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💖 DESCRIPTION 💖

so what does she actually do? two things, and honestly? iconic behavior:

• unmaps the buffer 🗺️
• cleans up the DMA transfer descriptor 🧹

that's it. that's the function. she unmaps and she cleans up, periodt 💅

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🔥 SEE ALSO 🔥

okay this is the part where the friend group gets BIG, so buckle up bestie — all of these are also hanging out in the kernel file ./drivers/i3c/master.c:

• i3c_bus_maintenance_lock(9)
• i3c_bus_maintenance_unlock(9)
• i3c_bus_normaluse_lock(9)
• i3c_bus_normaluse_unlock(9)
• i3c_master_queue_hotjoin(9)
• i3c_master_send_ccc_cmd_locked(9)
• i3c_master_get_free_addr(9)
• i3c_master_setaasa_locked(9)
• i3c_master_entdaa_locked(9)
• i3c_master_enec_disec_locked(9)
• i3c_master_disec_locked(9)
• i3c_master_enec_locked(9)
• i3c_master_defslvs_locked(9)
• i3c_master_reattach_i3c_dev_locked(9)
• i3c_master_has_wakeup_enabled_devs(9)
• i3c_master_dma_map_single(9)
• i3c_master_set_info(9)
• i3c_master_bus_init(9)
• __i3c_master_add_i3c_dev_locked(9)
• i3c_master_add_i3c_dev_locked(9)
• i3c_master_do_daa_ext(9)
• i3c_master_do_daa(9)
• i3c_master_queue_ibi(9)
• i3c_generic_ibi_free_pool(9)
• i3c_generic_ibi_alloc_pool(9)
• i3c_generic_ibi_get_free_slot(9)
• i3c_generic_ibi_recycle_slot(9)
• i3c_master_register(9)
• i3c_master_unregister(9)
• i3c_dev_disable_ibi_locked(9)
• i3c_dev_enable_ibi_locked(9)
• i3c_dev_request_ibi_locked(9)
• i3c_dev_free_ibi_locked(9)

and yes, i3c_master_dma_map_single(9) is right there in the list — she's the map to this unmap, they're a matched set, we love a duo 👑 (also. not me counting them. there's a lot. we stan a thorough SEE ALSO section 😭)

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quick reminder bestie: these are all from ./drivers/i3c/master.c — that's the house they all live in 🏠

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🌸💜 that's the whole page!! sourced from ./drivers/i3c, dated October 2026, and the man page is literally called i3c_master_dma_unmap_single(9) — so like, yeah, we're done here. go unmap something responsibly, ily, bye bestie 💖✨🎀