diag_cmd_data_alloc(9)

💖 NAME

Okay bestie, you’ve landed on diag_cmd_data_alloc(9) from the Kernel API Manual — and its whole thing is that it fills in a bde struct with dma buffers. Iconic, honestly. ✨

🦋 SYNOPSIS

struct lpfc_dmabufext * diag_cmd_data_alloc (struct lpfc_hba *phba ,
struct ulp_bde64 *bpl , uint32_t size , int nocopydata );

🎀 ARGUMENTS

• phba — Pointer to HBA context object.
• bpl — Pointer to 64 bit bde structure.
• size — Number of bytes to process.
• nocopydata — The flag to copy user data into the allocated buffer.

🌸 DESCRIPTION

This function is doing the absolute most: it allocates page size buffers and populates an lpfc_dmabufext. 🫶

If allowed, the user data pointed to with indataptr is copied into the kernel memory. Then the chained list of page size buffers is returned. No cap, that’s the whole flow. 💅

👑 SEE ALSO

• Kernel file: ./drivers/scsi/lpfc/lpfc_bsg.c
• 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_bsg_set_loopback_mode(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)
• 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)

Okay bye bestie — this page lives in ./drivers/scsi/lpfc, it’s dated October 2026, and it’s filed under diag_cmd_data_alloc(9). Mwah 💋✨