From 4212f4e94633f3403c3871d11213badc50b3f6e4 Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Wed, 22 Jul 2020 16:32:18 -0700 Subject: [PATCH] nvme: document nvme controller states We are starting to see some non-trivial states so lets start documenting them. Signed-off-by: Sagi Grimberg Signed-off-by: Christoph Hellwig --- drivers/nvme/host/nvme.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 2ee91a3..9262975 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -181,6 +181,20 @@ static inline u16 nvme_req_qid(struct request *req) */ #define NVME_QUIRK_DELAY_AMOUNT 2300 +/* + * enum nvme_ctrl_state: Controller state + * + * @NVME_CTRL_NEW: New controller just allocated, initial state + * @NVME_CTRL_LIVE: Controller is connected and I/O capable + * @NVME_CTRL_RESETTING: Controller is resetting (or scheduled reset) + * @NVME_CTRL_CONNECTING: Controller is disconnected, now connecting the + * transport + * @NVME_CTRL_DELETING: Controller is deleting (or scheduled deletion) + * @NVME_CTRL_DEAD: Controller is non-present/unresponsive during + * shutdown or removal. In this case we forcibly + * kill all inflight I/O as they have no chance to + * complete + */ enum nvme_ctrl_state { NVME_CTRL_NEW, NVME_CTRL_LIVE, -- 2.7.4