velocity_free_tx_buf(9)

💅 velocity_free_tx_buf(9) — like, the Kernel API Manual page, bestie

okay so before we even get into it: this page lives in the Kernel API Manual under the name velocity_free_tx_buf (section 9, iykyk), and it's about one (1) very specific little cleanup job. she's not glamorous, but she's load-bearing. 🫶

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✨ NAME ✨

velocity_free_tx_buf — free transmit buffer

like... she frees the transmit buffer. that's the whole vibe. no cap. 💅

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🌸 SYNOPSIS 🌸

void velocity_free_tx_buf (struct velocity_info *vptr , struct
       velocity_td_info *tdinfo , struct tx_desc *td );

three args, one void return, zero drama (mostly). ✨

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🎀 ARGUMENTS 🎀

• vptr — velocity 💖 (yes that's the whole description, she's concise)
• tdinfo — buffer 🧚
• td — the transmit descriptor to free 🔥

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🦋 DESCRIPTION 🦋

okay so the whole ✨thing✨ here is: release a transmit buffer. that's it, that's the job.

but here's the part you actually need to remember, bestie — she does a little vibe check first: 👀

• if the buffer was preallocated, she recycles it ♻️
• if it was not preallocated, she unmaps the buffer 🌈

so like, don't go assuming it always unmaps. it depends. read the room (and the preallocation state). periodt. 💅

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👑 SEE ALSO 👑

so there's a whole friend group here, and honestly? iconic. the kernel file this lives in is ./drivers/net/ethernet/via/via-velocity.c 🔥 — and then, in the order they're listed, we've got:

• mac_get_cam_mask(9), mac_set_cam_mask(9), mac_set_cam(9), mac_wol_reset(9), get_chip_name(9), velocity_set_int_opt(9), velocity_set_bool_opt(9), velocity_get_options(9), velocity_init_cam_filter(9), velocity_rx_reset(9), velocity_get_opt_media_mode(9), safe_disable_mii_autopoll(9), enable_mii_autopoll(9), velocity_mii_read(9), mii_check_media_mode(9), velocity_mii_write(9), set_mii_flow_control(9), mii_set_auto_on(9), velocity_set_media_mode(9), velocity_print_link_status(9), enable_flow_control_ability(9), velocity_soft_reset(9), velocity_set_multi(9), mii_init(9), setup_queue_timers(9), setup_adaptive_interrupts(9), velocity_init_registers(9), velocity_init_dma_rings(9), velocity_alloc_rx_buf(9), velocity_free_rd_ring(9), velocity_init_rd_ring(9), velocity_init_td_ring(9), velocity_free_dma_rings(9), velocity_free_td_ring(9), velocity_error(9), velocity_tx_srv(9), velocity_rx_csum(9), velocity_rx_copy(9), velocity_iph_realign(9), velocity_receive_frame(9), velocity_rx_srv(9), velocity_intr(9), velocity_open(9), velocity_shutdown(9), velocity_change_mtu(9), velocity_poll_controller(9), velocity_mii_ioctl(9), velocity_ioctl(9), velocity_get_stats(9), velocity_close(9), velocity_xmit(9), velocity_init_info(9), velocity_get_pci_info(9), velocity_get_platform_info(9), velocity_print_info(9), velocity_probe(9), velocity_remove(9), wol_calc_crc(9), velocity_set_wol(9), velocity_save_context(9), velocity_restore_context(9), velocity_ethtool_up(9), velocity_ethtool_down(9), velocity_init_module(9), velocity_cleanup_module(9)

yeah. that's a lot of besties. write them down, they will come up. 😭💜

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ngl the whole page is like three sentences long and yet she contains multitudes. recycle or unmap. that's the whole personality. 🍓

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k so that's the page!! this masterpiece dropped in October 2026, lives at ./drivers/net/ethernet/via, and answers to velocity_free_tx_buf(9) — mwah, go free those buffers responsibly bestie 💖✨🎀