linux-kernel - [PATCH v2 4/7] nvme.h: add telemetry log page definisions

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Date:   Wed,  8 May 2019 01:58:31 +0900
From:   Akinobu Mita <akinobu.mita@...il.com>
To:     linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Akinobu Mita <akinobu.mita@...il.com>,
        Johannes Berg <johannes@...solutions.net>,
        Keith Busch <keith.busch@...el.com>, Jens Axboe <axboe@...com>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>,
        Minwoo Im <minwoo.im.dev@...il.com>
Subject: [PATCH v2 4/7] nvme.h: add telemetry log page definisions

Copy telemetry log page definisions from nvme-cli.

Cc: Johannes Berg <johannes@...solutions.net>
Cc: Keith Busch <keith.busch@...el.com>
Cc: Jens Axboe <axboe@...com>
Cc: Christoph Hellwig <hch@....de>
Cc: Sagi Grimberg <sagi@...mberg.me>
Cc: Minwoo Im <minwoo.im.dev@...il.com>
Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
---
* v2
- New patch in this version.

 include/linux/nvme.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index c40720c..5217fe4 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -396,6 +396,28 @@ enum {
 	NVME_NIDT_UUID		= 0x03,
 };
 
+/* Derived from 1.3a Figure 101: Get Log Page – Telemetry Host
+ * -Initiated Log (Log Identifier 07h)
+ */
+struct nvme_telemetry_log_page_hdr {
+	__u8    lpi; /* Log page identifier */
+	__u8    rsvd[4];
+	__u8    iee_oui[3];
+	__le16  dalb1; /* Data area 1 last block */
+	__le16  dalb2; /* Data area 2 last block */
+	__le16  dalb3; /* Data area 3 last block */
+	__u8    rsvd1[368]; /* TODO verify */
+	__u8    ctrlavail; /* Controller initiated data avail?*/
+	__u8    ctrldgn; /* Controller initiated telemetry Data Gen # */
+	__u8    rsnident[128];
+	/* We'll have to double fetch so we can get the header,
+	 * parse dalb1->3 determine how much size we need for the
+	 * log then alloc below. Or just do a secondary non-struct
+	 * allocation.
+	 */
+	__u8    telemetry_dataarea[0];
+};
+
 struct nvme_smart_log {
 	__u8			critical_warning;
 	__u8			temperature[2];
@@ -832,6 +854,7 @@ enum {
 	NVME_LOG_FW_SLOT	= 0x03,
 	NVME_LOG_CHANGED_NS	= 0x04,
 	NVME_LOG_CMD_EFFECTS	= 0x05,
+	NVME_LOG_TELEMETRY_CTRL	= 0x08,
 	NVME_LOG_ANA		= 0x0c,
 	NVME_LOG_DISC		= 0x70,
 	NVME_LOG_RESERVATION	= 0x80,
-- 
2.7.4