STRUCT CPPI5_TR_RESP_T(9)

🦋 struct cppi5_tr_resp_t(9) — the TR response record, bestie

okay so welcome to the Kernel API Manual, specifically the page for struct cppi5_tr_resp_t, straight out of ./include/linux/dma/ti-cppi5.h. it's a little glow-up of a struct and honestly? she's giving "receipt for a transfer request." stay with me 💅

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✨ NAME ✨

struct cppi5_tr_resp_t — the TR response record. that's it, that's the vibe 🎀

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🌸 SYNOPSIS 🌸

here's the whole struct, typed out exactly, no notes:

struct cppi5_tr_resp_t {
    u8 status;
    u8 _reserved;
    u8 cmd_id;
    u8 flags;
 };

four little u8s. four. that's the entire main character. 👑

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💖 Members 💖

okay bestie let's meet the cast, one field at a time 🫶

• status — the status type and info, bundled together like a situationship 😭 this is where the response tells you how it went.
• _reserved — literally not used. she's just there holding space. respect. 🧘‍♀️
• cmd_id — the Command ID for the TR, used for TR for TR identification (yes, that's what it says, and yes, it's iconic). iykyk 🔥
• flags — Configuration Specific Flags. flags that are specific to the config. we love a self-describing queen. 💅

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⭐ SEE ALSO ⭐

okay this is the part where the manpage goes full group-chat-tag-everyone mode. every single one of these is in the Kernel file ./include/linux/dma/ti-cppi5.h and every single one made the list — no cap, nobody got left on read 🌈

• struct cppi5_desc_hdr_t(9)
• 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)
• 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)

like… that's the whole friend group. go say hi. 💜

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ngl if you're reading this page you're probably already deep in DMA descriptors, so drink some water and go read enum cppi5_tr_resp_status_type(9) next. 🍓

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and that's the page!! this one came from the source under ./include/linux/dma and it's dated October 2026 — so yeah, keep that in your notes bestie, slay, periodt. 🎀✨💅