lpfc_update_cmf_cmpl(9)

💅 lpfc_update_cmf_cmpl — the Kernel API Manual tea ☕

okay so bestie, gather round, because we're reading a kernel API page together and honestly? it's giving main character energy. this is lpfc_update_cmf_cmpl, straight out of the Kernel API Manual, and it's lowkey iconic. let's get into it ✨

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🌸 NAME 🌸

lpfc_update_cmf_cmpl — adjusts the CMF counters when an IO completes. that's it, that's the vibe 🎀

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🦋 SYNOPSIS 🦋

int lpfc_update_cmf_cmpl (struct lpfc_hba *phba , uint64_t time ,
uint32_t size , struct Scsi_Host *shost );

like, copy it exactly, no cap. four args, one return, we move 💅

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🌈 ARGUMENTS 🌈

• phba — the HBA this call is running for. it's her HBA, she's the moment.
• time — how long the IO took to complete, measured in ns (nanoseconds, yes, we're being that precise 🫶).
• size — the size of the IO that just completed.
• shost — the SCSI host the IO completed on. it's NULL for a NVME IO, so if you're passing NULL bestie, that's not a bug, that's a NVME IO. 💀

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💖 DESCRIPTION 💖

so what does this routine actually do? it adjusts the various Burst and Bandwidth counters — the ones used in Congestion management and E2E. that's the whole job, and she does it slayfully.

now here's the plot twist 👑: if time is set to LPFC_CGN_NOT_SENT, that means the IO was never issued to the HBA. so this routine isn't doing the normal counter thing — it's just being called to clean up the counter from a previous lpfc_update_cmf_cmd call. it's giving cleanup crew energy, and honestly? we respect it. 🧹✨

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⭐ SEE ALSO ⭐

the kernel file, first and foremost:

• Kernel file ./drivers/scsi/lpfc/lpfc_scsi.c

and then, bestie, the entire friend group 😭 — every single one of these, no skipping, iykyk:

• lpfc_sli4_set_rsp_sgl_last(9)
• lpfc_rampdown_queue_depth(9)
• lpfc_ramp_down_queue_handler(9)
• lpfc_scsi_dev_block(9)
• lpfc_new_scsi_buf_s3(9)
• lpfc_sli4_vport_delete_fcp_xri_aborted(9)
• lpfc_sli4_io_xri_aborted(9)
• lpfc_get_scsi_buf_s3(9)
• lpfc_get_scsi_buf_s4(9)
• lpfc_get_scsi_buf(9)
• lpfc_release_scsi_buf_s3(9)
• lpfc_release_scsi_buf_s4(9)
• lpfc_release_scsi_buf(9)
• lpfc_fcpcmd_to_iocb(9)
• lpfc_scsi_prep_dma_buf_s3(9)
• lpfc_bg_err_inject(9)
• lpfc_sc_to_bg_opcodes(9)
• lpfc_bg_err_opcodes(9)
• lpfc_bg_setup_bpl(9)
• lpfc_bg_setup_bpl_prot(9)
• lpfc_bg_setup_sgl(9)
• lpfc_bg_setup_sgl_prot(9)
• lpfc_prot_group_type(9)
• lpfc_bg_scsi_adjust_dl(9)
• lpfc_bg_scsi_prep_dma_buf_s3(9)
• lpfc_scsi_prep_dma_buf_s4(9)
• lpfc_bg_scsi_prep_dma_buf_s4(9)
• lpfc_scsi_prep_dma_buf(9)
• lpfc_bg_scsi_prep_dma_buf(9)
• lpfc_scsi_prep_cmnd_buf(9)
• lpfc_send_scsi_error_event(9)
• lpfc_scsi_unprep_dma_buf(9)
• lpfc_unblock_requests(9)
• lpfc_block_requests(9)
• lpfc_update_cmf_cmd(9)
• lpfc_handle_fcp_err(9)
• lpfc_fcp_io_cmd_wqe_cmpl(9)
• lpfc_scsi_cmd_iocb_cmpl(9)
• lpfc_scsi_prep_cmnd_buf_s3(9)
• lpfc_scsi_prep_cmnd_buf_s4(9)
• lpfc_scsi_prep_cmnd(9)
• lpfc_scsi_prep_task_mgmt_cmd_s3(9)
• lpfc_scsi_prep_task_mgmt_cmd_s4(9)
• lpfc_scsi_api_table_setup(9)
• lpfc_tskmgmt_def_cmpl(9)
• lpfc_check_pci_resettable(9)
• lpfc_info(9)
• lpfc_poll_rearm_timer(9)
• lpfc_poll_start_timer(9)
• lpfc_poll_timeout(9)
• lpfc_queuecommand(9)
• lpfc_abort_handler(9)
• lpfc_check_fcp_rsp(9)
• lpfc_send_taskmgmt(9)
• lpfc_chk_tgt_mapped(9)
• lpfc_reset_flush_io_context(9)
• lpfc_device_reset_handler(9)
• lpfc_target_reset_handler(9)
• lpfc_host_reset_handler(9)
• lpfc_sdev_init(9)
• lpfc_sdev_configure(9)
• lpfc_sdev_destroy(9)
• lpfc_create_device_data(9)
• lpfc_delete_device_data(9)
• __lpfc_get_device_data(9)
• lpfc_find_next_oas_lun(9)
• lpfc_enable_oas_lun(9)
• lpfc_disable_oas_lun(9)

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ngl bestie, that's a lot of cross-references, but every single one is real and every single one is in the original. we do not drop friends around here. 🫶

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🎀 the cute sign-off 🎀

this little masterpiece lives in ./drivers/scsi/lpfc, and it was dated October 2026. so yeah, she's from the future, she's in your kernel tree, and she's adjusting CMF counters like the icon she is. periodt. 💜🔥🌸

bye bestie, go complete some IOs 🦋✨