DPNI_OPT_SHARED_CONGESTION(9)

💅 DPNI_OPT_SHARED_CONGESTION 💅

okay bestie, buckle up, because this one is a little macro from the Kernel API Manual and she's got lore. The whole page header thing? yeah, DPNI_OPT_SHARED_CONGESTION(9) — that's her full legal name, and we're just gonna vibe with it up here at the top instead of copying the line like a robot. 🫶

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✨ NAME ✨

So like, DPNI_OPT_SHARED_CONGESTION — bestie, congestion can be managed in several ways, and the kernel is out here giving you options, okay?

• the buffer pool can deplete on ingress 😭
• taildrop on each queue 💀
• or use congestion groups for sets of queues 👑

And here's the tea: if this bad boy is set, it configures a single congestion group across all TCs. slay. But if it's reset, a congestion group is allocated for each TC. different vibe entirely.

⚠️ heads up babes: this is only relevant if the DPNI has multiple traffic classes. no multiple TCs, no drama, iykyk.

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🦋 SYNOPSIS 🦋

DPNI_OPT_SHARED_CONGESTION

that's it. that's the whole synopsis. iconic, honestly. 🌸

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🎀 SEE ALSO 🎀

like the whole friend group, fr fr. first up, the Kernel file itself:

./drivers/net/ethernet/freescale/dpaa2/dpni.h

and then the entire group chat:

• DPNI_MAX_TC(9), DPNI_MAX_DPBP(9), DPNI_ALL_TCS(9), DPNI_ALL_TC_FLOWS(9), DPNI_NEW_FLOW_ID(9), DPNI_OPT_TX_FRM_RELEASE(9), DPNI_OPT_NO_MAC_FILTER(9), DPNI_OPT_HAS_POLICING(9), DPNI_OPT_HAS_KEY_MASKING(9), DPNI_OPT_NO_FS(9), DPNI_OPT_SHARED_FS(9)
• struct dpni_pools_cfg(9), struct dpni_attr(9)
• DPNI_ERROR_EOFHE(9), DPNI_ERROR_FLE(9), DPNI_ERROR_FPE(9), DPNI_ERROR_PHE(9), DPNI_ERROR_L3CE(9), DPNI_ERROR_L4CE(9), enum dpni_error_action(9), struct dpni_error_cfg(9)
• DPNI_BUF_LAYOUT_OPT_TIMESTAMP(9), DPNI_BUF_LAYOUT_OPT_PARSER_RESULT(9), DPNI_BUF_LAYOUT_OPT_FRAME_STATUS(9), DPNI_BUF_LAYOUT_OPT_PRIVATE_DATA_SIZE(9), DPNI_BUF_LAYOUT_OPT_DATA_ALIGN(9), DPNI_BUF_LAYOUT_OPT_DATA_HEAD_ROOM(9), DPNI_BUF_LAYOUT_OPT_DATA_TAIL_ROOM(9), struct dpni_buffer_layout(9)
• enum dpni_queue_type(9), enum dpni_offload(9), union dpni_statistics(9)
• struct dpni_link_cfg(9), struct dpni_link_state(9)
• enum dpni_dist_mode(9), enum dpni_fs_miss_action(9), struct dpni_fs_tbl_cfg(9), struct dpni_rx_tc_dist_cfg(9), DPNI_FS_MISS_DROP(9), struct dpni_rx_dist_cfg(9)
• struct dpni_qos_tbl_cfg(9), enum dpni_dest(9)
• struct dpni_queue(9), struct dpni_queue_id(9)
• enum dpni_congestion_unit(9), enum dpni_congestion_point(9), struct dpni_dest_cfg(9), DPNI_CONG_OPT_FLOW_CONTROL(9), struct dpni_congestion_notification_cfg(9), struct dpni_taildrop(9)
• struct dpni_rule_cfg(9), DPNI_FS_OPT_DISCARD(9), DPNI_FS_OPT_SET_FLC(9), DPNI_FS_OPT_SET_STASH_CONTROL(9), struct dpni_fs_action_cfg(9), struct dpni_tx_shaping_cfg(9), struct dpni_single_step_cfg(9)

like… that's the whole squad. every single one. no cap. 💜

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and that's the page, babe ✨ — brought to you by ./drivers/net/ethernet/freesca... (yes it's truncated in the footer, that's just how she is 🙈), dated October 2026, and filed under DPNI_OPT_SHARED_CONGESTION(9). periodt. 💅🎀