lpfc_sli4_b...oopback_mode(9)

💅 lpfc_sli4_bsg_set_loopback_mode — the lpfc_sli4_b...oopback_mode(9) page, kernel API manual edition 🎀

okay so bestie, welcome to the lpfc_sli4_b...oopback_mode(9) page in the Kernel API Manual. yes we're in the kernel. yes there's a lot of underscores. no you're not lost. let's go ✨

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🌸 NAME 🌸

lpfc_sli4_bsg_set_loopback_mode — literally the function that sets up an sli4 internal loopback diagnostic 🌀

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🦋 SYNOPSIS 🦋

int lpfc_sli4_bsg_set_loopback_mode (struct lpfc_hba *phba , int mode ,
uint32_t link_no );

that's the whole signature, no cap. three args, one int back. 🫶

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✨ ARGUMENTS ✨

• phba — a pointer to the HBA context object. yes, the main character struct 💅
• mode — the loopback mode you wanna set. it's an int, it's the vibe you're choosing.
• link_no — the link number for the loopback mode you're setting, as a uint32_t. which link? this link. 🔗

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👑 DESCRIPTION 👑

so here's the tea, bestie: this function is the one responsible for issuing an sli4 mailbox command for setting up the loopback diagnostic for a link. that's it. that's the whole job. it shows up, it sends the mailbox command, it makes the loopback diagnostic happen. iconic behavior honestly 🧚

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🌈 SEE ALSO 🌈

the kernel file it lives in:

• ./drivers/scsi/lpfc/lpfc_bsg.c 📁

and now the part where I hold up the entire friend group so you can meet everyone — every single one of these, in order, no skipping, because they're all part of the lore:

• lpfc_bsg_send_mgmt_cmd_cmp(9)
• lpfc_bsg_send_mgmt_cmd(9)
• lpfc_bsg_rport_els_cmp(9)
• lpfc_bsg_rport_els(9)
• lpfc_bsg_event_free(9)
• lpfc_bsg_event_ref(9)
• lpfc_bsg_event_unref(9)
• lpfc_bsg_event_new(9)
• diag_cmd_data_free(9)
• lpfc_bsg_ct_unsol_abort(9)
• lpfc_bsg_hba_set_event(9)
• lpfc_bsg_hba_get_event(9)
• lpfc_issue_ct_rsp_cmp(9)
• lpfc_issue_ct_rsp(9)
• lpfc_bsg_send_mgmt_rsp(9)
• lpfc_bsg_diag_mode_enter(9)
• lpfc_bsg_diag_mode_exit(9)
• lpfc_sli3_bsg_diag_loopback_mode(9)
• lpfc_sli4_bsg_set_link_diag_state(9)
• lpfc_sli4_diag_fcport_reg_setup(9)
• lpfc_sli4_bsg_diag_loopback_mode(9)
• lpfc_bsg_diag_loopback_mode(9)
• lpfc_sli4_bsg_diag_mode_end(9)
• lpfc_sli4_bsg_link_diag_test(9)
• lpfcdiag_loop_self_reg(9)
• lpfcdiag_loop_self_unreg(9)
• lpfcdiag_loop_get_xri(9)
• lpfc_bsg_dma_page_alloc(9)
• lpfc_bsg_dma_page_free(9)
• lpfc_bsg_dma_page_list_free(9)
• diag_cmd_data_alloc(9)
• lpfcdiag_sli3_loop_post_rxbufs(9)
• lpfc_bsg_diag_loopback_run(9)
• lpfc_bsg_get_dfc_rev(9)
• lpfc_bsg_issue_mbox_cmpl(9)
• lpfc_bsg_check_cmd_access(9)
• lpfc_bsg_mbox_ext_session_reset(9)
• lpfc_rd_obj_emb0_handle_job(9)
• lpfc_bsg_issue_mbox_ext_handle_job(9)
• lpfc_bsg_issue_read_mbox_ext_cmpl(9)
• lpfc_bsg_issue_write_mbox_ext_cmpl(9)
• lpfc_bsg_sli_cfg_read_cmd_ext(9)
• lpfc_bsg_sli_cfg_write_cmd_ext(9)
• lpfc_bsg_handle_sli_cfg_mbox(9)
• lpfc_bsg_mbox_ext_abort(9)
• lpfc_bsg_read_ebuf_get(9)
• lpfc_bsg_write_ebuf_set(9)
• lpfc_bsg_handle_sli_cfg_ebuf(9)
• lpfc_bsg_handle_sli_cfg_ext(9)
• lpfc_bsg_issue_mbox(9)
• lpfc_bsg_mbox_cmd(9)
• lpfc_check_fwlog_support(9)
• lpfc_bsg_get_ras_config(9)
• lpfc_bsg_set_ras_config(9)
• lpfc_bsg_get_ras_lwpd(9)
• lpfc_bsg_get_ras_fwlog(9)
• lpfc_bsg_hst_vendor(9)
• lpfc_bsg_request(9)
• lpfc_bsg_timeout(9)

like I said. everyone. 🫡

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ok and that's the page!! sending you off with the cutest little sign-off: this whole thing lives in ./drivers/scsi/lpfc, dated October 2026, and it's the lpfc_sli4_b...oopback_mode(9) page 💖 go forth and loopback, bestie 🌟