cppi5_hdesc_calc_size(9)

✨ cppi5_hdesc_calc_size ✨

Okay bestie, so this one lives in the Kernel API Manual, section 9 — it's a kernel function, and honestly it's giving "small but mighty" 💅

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🌸 NAME 🌸

cppi5_hdesc_calc_size — Calculate Host Packet Descriptor size 🎀

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✨ SYNOPSIS ✨

u32 cppi5_hdesc_calc_size (bool epib , u32 psdata_size , u32
sw_data_size );

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🦋 ARGUMENTS 🦋

• epib — is EPIB present 👀
• psdata_size — PSDATA size
• sw_data_size — SWDATA size

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💖 RETURN 💖

It gives you back the required Host Packet Descriptor size 🔥 — but heads up, it returns 0 if PSDATA > CPPI5_INFO0_HDESC_PSDATA_MAX_SIZE 💀 like, that's the "nope, too big" answer, no cap.

Fr fr, watch that 0 — it's not a size, it's the "your PSDATA exceeded the max" signal 🙈

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🌈 SEE ALSO 🌈

Kernel file ./include/linux/dma/ti-cppi5.h — and the whole squad, because apparently everyone's invited to this party 💜

• 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_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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Okay that's the whole page, bestie — you ate that 🫶 Source is ./include/linux/dma, dated October 2026, and this cutie is cppi5_hdesc_calc_size(9) — periodt. 💅✨