cppi5_hdesc_get_psdata(9)

💅 cppi5_hdesc_get_psdata — a Kernel API Manual moment (section 9)

okay so bestie, welcome to the group chat where we learn how to grab a pointer to the PSDATA in a host packet descriptor. yes it's a kernel thing. yes it's iconic. no cap, this one's short and sweet 🎀

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✨ NAME ✨

cppi5_hdesc_get_psdata — Get pointer on PSDATA 🫶

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🌸 SYNOPSIS 🌸

void * cppi5_hdesc_get_psdata (struct cppi5_host_desc_t *desc );

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🦋 ARGUMENTS 🦋

• desc — Host packet descriptor. that's the vibe, that's the whole input 💜

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⭐ RETURN ⭐

so what do you get back? a pointer on PSDATA in HDesc. slay.

and if you get NULL? that's not an error bestie, that literally means ps_data placed at the start of data buffer 🌈 so like, it's giving "no separate PSDATA pointer, it's up front." periodt 💅

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🔥 SEE ALSO 🔥

the whole friend group, fr fr — including 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_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_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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bestie reminder 💖 this page lives under ./include/linux/dma, and it's dated October 2026 — so yeah, it's ahead of its time, main character energy only 😭✨ go read the header file, iykyk 🧚

anyway that's the page, go forth and get that PSDATA pointer, you're gonna ate 💅🌸🦋