issue_scb(9)

💅 issue_scb(9) — the kernel API manual, but make it make sense

okay so bestie, we're in Kernel API Manual territory today and the star of the show is issue_scb(9) ✨ lowkey a little baddie of a function. she's got one job, she does it, and she's been doing it in ./drivers/scsi/megaraid.c since forever. let's get into it 🎀

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🌸 NAME 🌸

issue_scb —

and that's literally it. the manpage leaves the description blank after the dash 😭 which is honestly giving "she said nothing but she said everything." no cap, that's the whole NAME section. iconic.

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⭐ SYNOPSIS ⭐

int issue_scb (adapter_t *adapter , scb_t *scb );

she takes two pointers and hands you back an int. simple. clean. main character energy 💜

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🦋 ARGUMENTS 🦋

• adapter — pointer to our soft state 🫶 like, our driver's whole vibe lives in here, so obviously she needs it.
• scb — the scsi control block ✨ the actual command package that's about to get yeeted at the hardware.

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🔥 DESCRIPTION 🔥

okay so the way this works 👑 — issue_scb posts a command to the card if the mailbox is available, and otherwise it returns busy. that's the whole mood: try to send, and if you can't, just shrug and say busy 💀

and there's a lil bonus move: we also take the scb from the pending list if the mailbox is available. so it's not just sending — she's also doing a bit of queue cleanup while she's in there. multitasking queen 🧚

busy is a real answer bestie. don't panic when you see it, that's just the mailbox being occupied 💅

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🌈 SEE ALSO 🌈

everything in the megaraid cinematic universe, fr fr — all of these live in the kernel file ./drivers/scsi/megaraid.c:

• mega_setup_mailbox(9)
• mega_runpendq(9)
• mega_allocate_scb(9)
• mega_get_ldrv_num(9)
• mega_build_cmd(9)
• mega_prepare_passthru(9)
• mega_prepare_extpassthru(9)
• issue_scb_block(9)
• megaraid_isr_iomapped(9)
• megaraid_isr_memmapped(9)
• mega_cmd_done(9)
• megaraid_abort_and_reset(9)
• mega_allocate_inquiry(9)
• proc_show_config(9)
• proc_show_stat(9)
• proc_show_mbox(9)
• proc_show_rebuild_rate(9)
• proc_show_battery(9)
• proc_show_pdrv(9)
• proc_show_pdrv_ch0(9)
• proc_show_pdrv_ch1(9)
• proc_show_pdrv_ch2(9)
• proc_show_pdrv_ch3(9)
• proc_show_rdrv(9)
• proc_show_rdrv_10(9)
• proc_show_rdrv_20(9)
• proc_show_rdrv_30(9)
• proc_show_rdrv_40(9)
• mega_create_proc_entry(9)
• mega_init_scb(9)
• megadev_open(9)
• megadev_ioctl(9)
• mega_m_to_n(9)
• mega_is_bios_enabled(9)
• mega_enum_raid_scsi(9)
• mega_get_boot_drv(9)
• mega_support_random_del(9)
• mega_support_ext_cdb(9)
• mega_del_logdrv(9)
• mega_get_max_sgl(9)
• mega_support_cluster(9)
• mega_adapinq(9)
• mega_internal_dev_inquiry(9)
• mega_internal_command(9)

forty-four cross-references, bestie, we counted 💀 go read them all, iykyk 🍓

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mwah 💋 that's the page. this lil slice of kernel lore lives in ./drivers/scsi, stamped October 2026, and it's filed under issue_scb(9) — so if you ever forget where you read it, that's your receipt 🧾✨