nvmet: implement rotational media information log

Most of the information is stubbed. Supporting these commands is a
requirement for supporting rotational media.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>

include/linux/nvme.h

@@ -642,6 +642,18 @@ struct nvme_endurance_group_log {
 	__u8	rsvd192[320];
 };
 
+struct nvme_rotational_media_log {
+	__le16	endgid;
+	__le16	numa;
+	__le16	nrs;
+	__u8	rsvd6[2];
+	__le32	spinc;
+	__le32	fspinc;
+	__le32	ldc;
+	__le32	fldc;
+	__u8	rsvd24[488];
+};
+
 struct nvme_smart_log {
 	__u8			critical_warning;
 	__u8			temperature[2];
@@ -1281,6 +1293,7 @@ enum {
 	NVME_LOG_ENDURANCE_GROUP = 0x09,
 	NVME_LOG_ANA		= 0x0c,
 	NVME_LOG_FEATURES	= 0x12,
+	NVME_LOG_RMI		= 0x16,
 	NVME_LOG_DISC		= 0x70,
 	NVME_LOG_RESERVATION	= 0x80,
 	NVME_FWACT_REPL		= (0 << 3),
@@ -1435,7 +1448,7 @@ struct nvme_get_log_page_command {
 	__u8			lsp; /* upper 4 bits reserved */
 	__le16			numdl;
 	__le16			numdu;
-	__u16			rsvd11;
+	__le16			lsi;
 	union {
 		struct {
 			__le32 lpol;