cppi5_hdesc_..._psdata_size(9)

💅 cppi5_hdesc_update_psdata_size — your girl's guide to the kernel API manual ✨

okay so bestie, this page lives in the Linux kernel API manual, and today's main character is a tiny little function that swaps out the PSDATA size on a host packet descriptor. no cap, it's short, it's sweet, and it does exactly one thing. let's get into it 🎀

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🌸 NAME 🌸

cppi5_hdesc_update_psdata_size — Replace PSdata size 💖

like, literally just replace the PSdata size. that's the whole vibe. she's not complicated, she's not doing extra credit, she's just here to update a number. periodt.

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✨ SYNOPSIS ✨

void cppi5_hdesc_update_psdata_size (struct cppi5_host_desc_t *desc ,
u32 psdata_size );

note the void — she doesn't return anything, she doesn't gossip back to you, she just does the job and leaves. iconic behaviour tbh 🫶

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🦋 ARGUMENTS 🦋

• desc — Host packet descriptor. this is the descriptor you're updating, and yes you have to actually pass one, she's not gonna go find it for you 💀
• psdata_size — PSDATA size. a u32, and it's the new value going in. that's it. that's the tea 🍓

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👑 SEE ALSO 👑

bestie there are so many friends in this friend group, buckle up 💅 — all of these live in the kernel file ./include/linux/dma/ti-cppi5.h:

• 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_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)

like I said. huge friend group. iykyk 🌈

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lowkey obsessed with how a one-line function still gets a whole SEE ALSO section. that's main character energy fr fr 🔥

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and that's the whole page, bestie!! sourced straight outta ./include/linux/dma, dated October 2026 — consider this your cute little sign-off, mwah 💜🎀✨