encode_rcv_h...r_entry_size(9)

🌸 NAME 🌸

okay so bestie, this page is from the Kernel API Manual (the header shortens the name to encode_rcv_h...r_entry_size(9), iykyk 💅) and here's the whole vibe:

encode_rcv_header_entry_size — return chip specific encoding for size ✨

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🎀 SYNOPSIS 🎀

u8 encode_rcv_header_entry_size (u8 size );

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🦋 ARGUMENTS 🦋

• size — size in dwords, bestie. that's the whole input 🫶

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💜 DESCRIPTION 💜

so what it does is convert a receive header entry size into the encoding used in the CSR. literally that's the job 💅

and if the size you hand it is invalid? it returns a zero — no cap, that's the invalid signal. otherwise you get the encoding back. periodt ✨

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🌈 SEE ALSO 🌈

the kernel file that lives with all this:

• ./drivers/infiniband/hw/hfi1/chip.c

and the whole friend group of related functions, in order, no skipping 🙈:

• hfi1_addr_from_offset(9)
• read_csr(9)
• write_csr(9)
• get_csr_addr(9)
• update_xmit_counters(9)
• apply_link_downgrade_policy(9)
• is_rcv_avail_int(9)
• is_rcv_urgent_int(9)
• general_interrupt(9)
• hfi1_rcd_eoi_intr(9)
• hfi1_netdev_rx_napi(9)
• data_vls_operational(9)
• hfi1_validate_rcvhdrcnt(9)
• set_hdrq_regs(9)
• update_statusp(9)
• wait_logical_linkstate(9)
• read_mod_write(9)
• set_intr_bits(9)
• set_up_interrupts(9)
• hfi1_get_qp_map(9)
• init_qpmap_table(9)
• init_qos(9)
• hfi1_init_dd(9)
• create_pbc(9)

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okay that's the whole page, bestie 🎀 this lil manual comes from ./drivers/infiniband/hw/hfi1, dated October 2026, and it's filed under encode_rcv_h...r_entry_size(9) — slay, go read the kernel source now 💖✨