qbman_swp_release_mem_back(9)

qbman_swp_release_mem_back(9) 💅

okay so bestie, this is the Kernel API Manual page for qbman_swp_release_mem_back(9), and it is literally the “issue a buffer release command” moment. no cap, it’s giving kernel-portal main character energy. 🦋

🌸 NAME 🌸

qbman_swp_release_mem_back — issue a buffer release command. periodt. 💖

🦋 SYNOPSIS 🦋

int qbman_swp_release_mem_back (struct qbman_swp *s , const struct qbman_release_desc *d , const u64 *buffers , unsigned int num_buffers );

🎀 ARGUMENTS 🎀

• s — the software portal object. your software portal bestie. ✨
• d — the release descriptor. the desc that tells the release what’s up. 🎀
• buffers — a pointer pointing to the buffer address to be released. yes, pointer-to-buffer-address, keep up bestie. 🫶
• num_buffers — number of buffers to be released; must be less than 8. not 8, not 9, less than 8, iykyk. 💅

💖 DESCRIPTION 💖

Return 0 for success, -EBUSY if the release command ring is not ready. that’s the whole vibe check: 0 = slay, -EBUSY = the release command ring is not ready, no cap. 🔥

🌈 SEE ALSO 🌈

Kernel file: ./drivers/soc/fsl/dpio/qbman-portal.c — the source file in question, bestie. 🧚

The related-reference squad, because we don’t gatekeep:

• qbman_swp_init(9)
• qbman_swp_finish(9)
• qbman_swp_interrupt_read_status(9)
• qbman_swp_interrupt_clear_status(9)
• qbman_swp_interrupt_get_trigger(9)
• qbman_swp_interrupt_set_trigger(9)
• qbman_swp_interrupt_get_inhibit(9)
• qbman_swp_interrupt_set_inhibit(9)
• qbman_eq_desc_set_no_orp(9)
• qbman_eq_desc_set_fq(9)
• qbman_eq_desc_set_qd(9)
• qbman_swp_enqueue_direct(9)
• qbman_swp_enqueue_mem_back(9)
• qbman_swp_enqueue_multiple_direct(9)
• qbman_swp_enqueue_multiple_mem_back(9)
• qbman_swp_enqueue_multiple_desc_direct(9)
• qbman_swp_enqueue_multiple_desc_mem_back(9)
• qbman_swp_push_get(9)
• qbman_swp_push_set(9)
• qbman_pull_desc_clear(9)
• qbman_pull_desc_set_storage(9)
• qbman_pull_desc_set_numframes(9)
• qbman_pull_desc_set_fq(9)
• qbman_pull_desc_set_wq(9)
• qbman_pull_desc_set_channel(9)
• qbman_swp_pull_direct(9)
• qbman_swp_pull_mem_back(9)
• qbman_swp_dqrr_next_direct(9)
• qbman_swp_dqrr_next_mem_back(9)
• qbman_swp_dqrr_consume(9)
• qbman_result_has_new_result(9)
• qbman_release_desc_clear(9)
• qbman_release_desc_set_bpid(9)
• qbman_release_desc_set_rcdi(9)
• qbman_swp_release_direct(9)
• qbman_swp_acquire(9)
• qbman_swp_set_irq_coalescing(9)
• qbman_swp_get_irq_coalescing(9)

💖 That’s the tea: source ./drivers/soc/fsl/dpio, dated October 2026, page qbman_swp_release_mem_back(9) — signing off with a buffer-release slay! 🎀