STRUCT CPPI5_DESC_HDR_T(9)

💖 struct cppi5_desc_hdr_t(9) — the Kernel API Manual glow-up ✨

okay bestie, so this is a page straight outta the Kernel API Manual, and it's about the literal blueprint every CPPI descriptor is built on. it's giving "the header that ate" — every type of descriptor has it, no exceptions, periodt. 🎀

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🌸 NAME 🌸

struct cppi5_desc_hdr_t — the Descriptor header, and she's present in all types of descriptors. every single one. she's the main character and everyone else is just living in her world. 👑

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🦋 SYNOPSIS 🦋

struct cppi5_desc_hdr_t {
    u32 pkt_info0;
    u32 pkt_info1;
    u32 pkt_info2;
    u32 src_dst_tag;
};

four u32s. that's it. that's the whole vibe. tiny struct, huge responsibilities. ✨

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🌈 Members 🌈

• pkt_info0 — Packet info word 0. lowkey not a thing in a Buffer desc tho (n/a there, bestie, don't come for her). 💅
• pkt_info1 — Packet info word 1. same story: n/a in Buffer desc. 🙈
• pkt_info2 — Packet info word 2. yup, also n/a in Buffer desc. consistency is iconic. ⭐
• src_dst_tag — Packet info word 3. and yes, n/a in Buffer desc like her three sisters. 🫶

fr fr the whole "n/a in Buffer desc" thing applies to every single member here — Buffer descriptors just don't use these words, iykyk. 💀

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🧚 SEE ALSO 🧚

the whole friend group, okay? like, the entire group chat. 💜

• Kernel file ./include/linux/dma/ti-cppi5.h
• struct cppi5_host_desc_t(9)
• struct cppi5_desc_epib_t(9)
• struct cppi5_monolithic_desc_t(9)
• cppi5_desc_is_tdcm(9)
• cppi5_desc_get_type(9)
• cppi5_desc_get_errflags(9)
• cppi5_desc_get_pktids(9)
• cppi5_desc_set_pktids(9)
• cppi5_desc_set_retpolicy(9)
• cppi5_desc_get_tags_ids(9)
• cppi5_desc_set_tags_ids(9)
• cppi5_hdesc_calc_size(9)
• cppi5_hdesc_init(9)
• cppi5_hdesc_update_flags(9)
• cppi5_hdesc_update_psdata_size(9)
• cppi5_hdesc_get_psdata_size(9)
• cppi5_hdesc_get_pktlen(9)
• cppi5_hdesc_set_pktlen(9)
• cppi5_hdesc_get_psflags(9)
• cppi5_hdesc_set_psflags(9)
• cppi5_hdesc_get_pkttype(9)
• cppi5_hdesc_set_pkttype(9)
• cppi5_hdesc_attach_buf(9)
• cppi5_hdesc_link_hbdesc(9)
• cppi5_hdesc_epib_present(9)
• cppi5_hdesc_get_psdata(9)
• cppi5_hdesc_get_swdata(9)
• enum cppi5_tr_types(9)
• enum cppi5_tr_event_size(9)
• enum cppi5_tr_trigger(9)
• enum cppi5_tr_trigger_type(9)
• struct cppi5_tr_type0_t(9)
• struct cppi5_tr_type1_t(9)
• struct cppi5_tr_type2_t(9)
• struct cppi5_tr_type3_t(9)
• struct cppi5_tr_type15_t(9)
• struct cppi5_tr_resp_t(9)
• enum cppi5_tr_resp_status_type(9)
• enum cppi5_tr_resp_status_submission(9)
• enum cppi5_tr_resp_status_unsupported(9)
• cppi5_trdesc_calc_size(9)
• cppi5_trdesc_init(9)
• cppi5_tr_init(9)
• cppi5_tr_set_trigger(9)
• cppi5_tr_csf_set(9)

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and that's the whole page, bestie — go read the kernel file, it's right there in ./include/linux/dma, mwah 💋. this lil beauty lives in ./include/linux/dma and dropped October 2026, so you know she's fresh. slay, bye! 🍓💅