ish_disable_dma(9)

💅 ish_disable_dma (9) — from the Kernel API Manual, bestie

okay so picture this: it's giving kernel-internal, it's giving Intel ISH energy, and the manual page name is literally ish_disable_dma. Welcome to the Kernel API Manual glow-up, bestie — this one's short, sweet, and does exactly one job. 🎀

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✨ NAME ✨

ish_disable_dma — shuts down the dma communication between the host and ISHFW, no cap 🫶

So like… the host and ISHFW have been chatting over dma, and this function is the "okay bye bestie, we're done here" moment. 💅

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🌸 SYNOPSIS 🌸

int ish_disable_dma (struct ishtp_device *dev );

yeah that's it. one argument, one int coming back atcha. iconic minimalism honestly. ⭐

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🦋 ARGUMENTS 🦋

• dev — the ishtp device pointer. that's the whole argument list. one (1) pointer, the main character of this story. 👑

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💖 DESCRIPTION 💖

okay so here's the entire vibe: it clears the dma enable bit and then it waits for dma to go inactive. that's the whole thing. 🧚

clear the enable bit → wait for inactive → done.

it's literally the "turning the lights off and making sure everyone actually left the party" of kernel functions. no extra steps, no notes. ✨

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🔥 RETURN 🔥

• 0 for success 💖
• else an error code 😭 (like, not zero, so… something went sideways, bestie)

fr fr: 0 = slay, anything else = check your error codes.

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🌈 SEE ALSO 🌈

this is the part where the manpage gets social — it's all "you may also know me from…" and honestly the friend group is HUGE. 🫶

Kernel file ./drivers/hid/intel-ish-hid/ipc/ipc.c plus:

• ish_reg_read(9)
• ish_reg_write(9)
• _ish_read_fw_sts_reg(9)
• check_generated_interrupt(9)
• ish_is_input_ready(9)
• set_host_ready(9)
• ishtp_fw_is_ready(9)
• ish_set_host_rdy(9)
• ish_clr_host_rdy(9)
• ish_set_host_ready(9)
• _ishtp_read_hdr(9)
• _ishtp_read(9)
• write_ipc_from_queue(9)
• write_ipc_to_queue(9)
• ipc_send_mng_msg(9)
• timed_wait_for_timeout(9)
• ish_fw_reset_handler(9)
• fw_reset_work_fn(9)
• _ish_sync_fw_clock(9)
• recv_ipc(9)
• ish_irq_handler(9)
• ish_wakeup(9)
• _ish_hw_reset(9)
• _ish_ipc_reset(9)
• ish_hw_start(9)
• ish_ipc_get_header(9)
• _dma_no_cache_snooping(9)
• ish_dev_init(9)
• ish_device_disable(9)

like I said. big friend group. iykyk. 💀

seriously though — if you're poking around the Intel ISH IPC code, read the ones above too, they're all in the same ./drivers/hid/intel-ish-hid/ipc/ipc.c situation and they all reference each other. 👀

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and that's the whole page, bestie — no more sections hiding at the bottom. 🎀

sign-off time ✨ this little gem lives under ./drivers/hid/intel-ish-hid/ipc, dated October 2026, and it's page ish_disable_dma(9). go forth and disable that dma. slay. 💜🍓