hbm_ver_show(9)

💅 hbm_ver_show(9) — like, the whole vibe

okay bestie, welcome to the Kernel API Manual ✨ this one's a nine-pointer (9) and it's all about peeking at the HBM protocol version that got negotiated with the FW. yes, THE firmware. we're nosy and we're proud 🎀

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🌸 NAME 🌸

hbm_ver_show — display HBM protocol version negotiated with FW

that's it, that's the whole job. it shows you the version. iconic behavior, no notes 💖

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✨ SYNOPSIS ✨

ssize_t hbm_ver_show (struct device *device , struct device_attribute
*attr , char *buf );

like, that's the shape of it. one function, three args, one ssize_t coming back atcha 🦋

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🫶 ARGUMENTS 🫶

• device — device pointer. yeah. the device. the actual one. main character energy fr 👑
• attr — attribute pointer. it's the attribute, bestie, it's just vibing there 💅
• buf — char out buffer. this is where the printing happens. the output lives here. that's the whole point 🎀

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🔥 RETURN 🔥

number of the bytes printed into buf or error 😭

so like — it hands you back a count of how many bytes it wrote into buf, or it gives you an error instead. one or the other. that's the deal, no cap 💀

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🌈 SEE ALSO 🌈

okay so there's a whole friend group here and honestly? the guest list ate. it's all chilling in the Kernel file ./drivers/misc/mei/main.c:

• mei_open(9)
• mei_cl_vtag_remove_by_fp(9)
• mei_release(9)
• mei_read(9)
• mei_cl_vtag_by_fp(9)
• mei_write(9)
• mei_ioctl_connect_client(9)
• mei_vt_support_check(9)
• mei_ioctl_connect_vtag(9)
• mei_ioctl_client_notify_request(9)
• mei_ioctl_client_notify_get(9)
• mei_ioctl(9)
• mei_poll(9)
• mei_cl_is_write_queued(9)
• mei_fsync(9)
• mei_fasync(9)
• trc_show(9)
• fw_status_show(9)
• hbm_ver_drv_show(9)
• fw_ver_show(9)
• dev_state_show(9)
• mei_set_devstate(9)
• kind_show(9)
• mei_minor_get(9)
• mei_minor_free(9)

that's twenty-five little links, all accounted for, iykyk 🧚💜

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lowkey a reminder bestie: this page is from ./drivers/misc/mei and it's dated October 2026 — so like, cite it cute when you quote it, mwah 🍓

and that's the page!! go read your HBM version, you absolute legend, periodt 💅✨🌸