hl_fw_copy_fw_to_device(9)

💅 hl_fw_copy_fw_to_device — a Kernel API Manual moment

okay so bestie, welcome to hl_fw_copy_fw_to_device(9), straight out of the Kernel API Manual. this is the little function that actually does the thing — the copy-paste of firmware onto your device. no cap, it's the moment the ✨data✨ leaves the cozy firmware blob and lands in device memory. let's get into it 🎀

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🌸 NAME

hl_fw_copy_fw_to_device — literally "copy FW to device". that's it. that's the whole vibe. the name ate and left no crumbs 💅

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✨ SYNOPSIS

int hl_fw_copy_fw_to_device (struct hl_device *hdev , const struct
firmware *fw , void __iomem *dst , u32 src_offset , u32 size );

she takes five arguments and returns an int. keep that signature exactly as-is, bestie, it's not a suggestion 🫶

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🦋 ARGUMENTS

• hdev — pointer to the hl_device structure. your main character struct, the whole device representation 🙈
• fw — the fw descriptor. aka the firmware we're being obsessed with today ⭐
• dst — the IO memory mapped address space to copy firmware to. this is where it's all going, the destination era 🌈
• src_offset — offset in src FW to copy from. skip ahead in the source file like you're skimming a group chat, iykyk 💀
• size — amount of bytes to copy, and lowkey the special part: 0 to copy the whole binary. cute shortcut, no extra work for you 💖

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🔥 DESCRIPTION

this is the actual copy of FW binary data to the device. not a promise, not a plan, not a "we'll get to it later" — the real transfer of bytes, happening now 🔥

it's shared by both the static and dynamic loaders, so the two of them are basically sharing one brain cell and honestly? iconic. one function, two callers, zero drama 🧚

ngl this is the shared engine room — both loaders depend on it getting the bytes right, so don't be weird about the arguments 💜

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👑 SEE ALSO

the kernel file it lives in:

./drivers/accel/habanalabs/common/firmware_if.c

and here's the extended family, the whole friend group, in the exact order they were listed (yes, all of them, I'm not skipping anyone, they're all valid 💅):

• hl_fw_version_cmp(9)
• extract_u32_until_given_char(9)
• hl_get_sw_major_minor_subminor(9)
• hl_get_preboot_major_minor(9)
• hl_release_firmware(9)
• hl_fw_copy_msg_to_device(9)
• hl_fw_load_fw_to_device(9)
• hl_fw_send_cpu_message(9)
• hl_fw_preboot_update_state(9)
• hl_fw_dynamic_report_error_status(9)
• hl_fw_dynamic_send_cmd(9)
• hl_fw_dynamic_extract_fw_response(9)
• hl_fw_dynamic_wait_for_status(9)
• hl_fw_dynamic_send_clear_cmd(9)
• hl_fw_dynamic_send_protocol_cmd(9)
• hl_fw_compat_crc32(9)
• hl_fw_dynamic_validate_memory_bound(9)
• hl_fw_dynamic_validate_descriptor(9)
• hl_fw_dynamic_read_and_validate_descriptor(9)
• hl_fw_dynamic_request_descriptor(9)
• hl_fw_dynamic_read_device_fw_version(9)
• hl_fw_dynamic_copy_image(9)
• hl_fw_dynamic_copy_msg(9)
• hl_fw_boot_fit_update_state(9)
• hl_fw_dynamic_load_image(9)
• hl_fw_linux_update_state(9)
• hl_fw_dynamic_send_msg(9)
• hl_fw_dynamic_init_cpu(9)
• hl_fw_static_init_cpu(9)
• hl_fw_init_cpu(9)

fr fr that's a whole roster. all of them live under ./drivers/accel/habanalabs/common 🦋

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and that's the page, bestie! 💖 this lil masterpiece is dated October 2026 and comes to you from ./drivers/accel/habanalabs/common — go read the actual source at ./drivers/accel/habanalabs/common/firmware_if.c, slay, and remember: size of 0 means the whole binary. periodt 👑✨