PVR_PACKED_BVNC(9)

💅 PVR_PACKED_BVNC — like, the Kernel API Manual one, bestie ✨

okay so real talk, this is PVR_PACKED_BVNC(9) from the Kernel API Manual and it's literally just a lil macro that smooshes four numbers into one big 64-bit unsigned integer. it's giving "packing cubes but for GPU identifiers" 🎀

---

🌸 NAME 🌸

PVR_PACKED_BVNC — packs B, V, N and C values into a 64-bit unsigned integer. that's it, that's the whole gig 🫶

---

✨ SYNOPSIS ✨

PVR_PACKED_BVNC (b , v , n , c );

yes bestie the spacing is a little chaotic, we're keeping it exactly as-is, no cap 💅

---

🎀 ARGUMENTS 🎀

• b — Branch ID. the B in the group chat.
• v — Version ID. the V, obviously.
• n — Number of scalable units. the N, and lowkey the most mysterious one.
• c — Config ID. the C, rounding out the squad.

---

🦋 DESCRIPTION 🦋

okay so the packed layout is this iconic thing right here:

┌──────────────────────────────────────┐
│     63..48   47..32   31..16   15..0 │
└──────────────────────────────────────┘
+========+========+========+=======+ | B      | V      | N      | C
|

like, every field gets its own lil 16-bit slice of the 64-bit pie and honestly? slay. 🔥

now here's the important part — if you have a struct pvr_gpu_id sitting around, use pvr_gpu_id_to_packed_bvnc instead of this macro. why? because it makes sure you get proper type checking. it's the responsible-main-character move, fr fr. 🙈

---

👑 RETURN 👑

Packed BVNC. that's the whole return value, bestie — one packed lil integer, no more no less 💖

---

🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/imagination/pvr_device.h
• struct pvr_gpu_id(9)
• struct pvr_fw_version(9)
• struct pvr_device_data(9)
• struct pvr_device(9)
• struct pvr_file(9)
• PVR_HAS_FEATURE(9)
• PVR_FEATURE_VALUE(9)
• PVR_HAS_QUIRK(9)
• PVR_HAS_ENHANCEMENT(9)
• pvr_gpu_id_to_packed_bvnc(9)
• PVR_CR_FIELD_GET(9)
• pvr_cr_read32(9)
• pvr_cr_read64(9)
• pvr_cr_write32(9)
• pvr_cr_write64(9)
• pvr_cr_poll_reg32(9)
• pvr_cr_poll_reg64(9)
• pvr_round_up_to_cacheline_size(9)
• IOCTL validation helpers(9)
• pvr_ioctl_union_padding_check(9)
• PVR_STATIC_ASSERT_64BIT_ALIGNED(9)
• PVR_IOCTL_UNION_PADDING_CHECK(9)

---

and that's the whole page!! 🧚 mwah 💋 this lil rewrite lives in ./drivers/gpu/drm/imagination, dated October 2026, and it's still PVR_PACKED_BVNC(9) at the end of the day — periodt. ⭐