rio_release_dma(9)

💅 rio_release_dma ✨

okay so bestie, welcome to the rio_release_dma(9) page — yeah it's section 9, that's the Kernel API Manual zone, very kernel-core of it. This one is short and sweet but it's lowkey important, so let's get into it 🫶

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🌸 NAME 🌸

rio_release_dma — release specified DMA channel ✨

like, you're giving the channel back. that's the whole vibe. 🎀

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🦋 SYNOPSIS 🦋

void rio_release_dma (struct dma_chan *dchan );

that's it. that's the whole function. no cap 💅 (yes the spacing is exactly like that, we don't question the kernel formatting, we respect it 🙈)

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💖 ARGUMENTS 💖

• dchan — the DMA channel you wanna release, bestie. that's the one getting handed back. 🫶

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👑 SEE ALSO 👑

okay this part is a moment, there's a whole friend group here. literally the entire RapidIO extended family showed up and they all ate 🔥 the kernel file is ./drivers/rapidio/rio.c, and here's everybody:

• rio_local_get_device_id(9)
• rio_query_mport(9)
• rio_alloc_net(9)
• rio_local_set_device_id(9)
• rio_add_device(9)
• rio_request_inb_mbox(9)
• rio_release_inb_mbox(9)
• rio_request_outb_mbox(9)
• rio_release_outb_mbox(9)
• rio_setup_inb_dbell(9)
• rio_request_inb_dbell(9)
• rio_release_inb_dbell(9)
• rio_request_outb_dbell(9)
• rio_release_outb_dbell(9)
• rio_add_mport_pw_handler(9)
• rio_del_mport_pw_handler(9)
• rio_request_inb_pwrite(9)
• rio_release_inb_pwrite(9)
• rio_pw_enable(9)
• rio_map_inb_region(9)
• rio_unmap_inb_region(9)
• rio_map_outb_region(9)
• rio_unmap_outb_region(9)
• rio_mport_get_physefb(9)
• rio_get_comptag(9)
• rio_set_port_lockout(9)
• rio_enable_rx_tx_port(9)
• rio_chk_dev_route(9)
• rio_mport_chk_dev_access(9)
• rio_chk_dev_access(9)
• rio_get_input_status(9)
• rio_clr_err_stopped(9)
• rio_inb_pwrite_handler(9)
• rio_mport_get_efb(9)
• rio_mport_get_feature(9)
• rio_std_route_add_entry(9)
• rio_std_route_get_entry(9)
• rio_std_route_clr_table(9)
• rio_lock_device(9)
• rio_unlock_device(9)
• rio_route_add_entry(9)
• rio_route_get_entry(9)
• rio_route_clr_table(9)
• rio_request_mport_dma(9)
• rio_dma_prep_xfer(9)
• rio_register_scan(9)
• rio_mport_scan(9)

ngl that's a lot of cousins but every single one of them matters, iykyk 💀💜

reminder bestie: this page only gives you the release call. if you wanna know what any of those other forty-something functions do, go read their pages, i'm not out here making things up 🙈

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okay and one tiny thing — the manual is literally a one-liner so there's no big DESCRIPTION essay to hype up. release the channel, that's the assignment, and you ate. 💅⭐

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— and that's the whole page, bestie! 🌈 source is ./drivers/rapidio, dated October 2026, and it's filed as rio_release_dma(9) in the Kernel API Manual. mwah, go release some DMA channels responsibly 🍓🧚💜