nvme: add reservation command's defines

This is a preparation patch for NVMeOF target reservation
commands implantation.
Add the defines of reservation command, such as reservation log
and sub operations.

Signed-off-by: Guixin Liu <[email protected]>
Tested-by: Chaitanya Kulkarni <[email protected]>
Reviewed-by: Chaitanya Kulkarni <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Keith Busch <[email protected]>

Author: guixinliu1995

include/linux/nvme.h

@@ -2037,4 +2037,72 @@ struct nvme_completion {
 #define NVME_MINOR(ver)		(((ver) >> 8) & 0xff)
 #define NVME_TERTIARY(ver)	((ver) & 0xff)
 
+enum {
+	NVME_AEN_RESV_LOG_PAGE_AVALIABLE	= 0x00,
+};
+
+enum {
+	NVME_PR_LOG_EMPTY_LOG_PAGE			= 0x00,
+	NVME_PR_LOG_REGISTRATION_PREEMPTED		= 0x01,
+	NVME_PR_LOG_RESERVATION_RELEASED		= 0x02,
+	NVME_PR_LOG_RESERVATOPM_PREEMPTED		= 0x03,
+};
+
+enum {
+	NVME_PR_NOTIFY_BIT_REG_PREEMPTED		= 1,
+	NVME_PR_NOTIFY_BIT_RESV_RELEASED		= 2,
+	NVME_PR_NOTIFY_BIT_RESV_PREEMPTED		= 3,
+};
+
+struct nvme_pr_log {
+	__le64			count;
+	__u8			type;
+	__u8			nr_pages;
+	__u8			rsvd1[2];
+	__le32			nsid;
+	__u8			rsvd2[48];
+};
+
+struct nvmet_pr_register_data {
+	__le64	crkey;
+	__le64	nrkey;
+};
+
+struct nvmet_pr_acquire_data {
+	__le64	crkey;
+	__le64	prkey;
+};
+
+struct nvmet_pr_release_data {
+	__le64	crkey;
+};
+
+enum nvme_pr_capabilities {
+	NVME_PR_SUPPORT_PTPL				= 1,
+	NVME_PR_SUPPORT_WRITE_EXCLUSIVE			= 1 << 1,
+	NVME_PR_SUPPORT_EXCLUSIVE_ACCESS		= 1 << 2,
+	NVME_PR_SUPPORT_WRITE_EXCLUSIVE_REG_ONLY	= 1 << 3,
+	NVME_PR_SUPPORT_EXCLUSIVE_ACCESS_REG_ONLY	= 1 << 4,
+	NVME_PR_SUPPORT_WRITE_EXCLUSIVE_ALL_REGS	= 1 << 5,
+	NVME_PR_SUPPORT_EXCLUSIVE_ACCESS_ALL_REGS	= 1 << 6,
+	NVME_PR_SUPPORT_IEKEY_VER_1_3_DEF		= 1 << 7,
+};
+
+enum nvme_pr_register_action {
+	NVME_PR_REGISTER_ACT_REG		= 0,
+	NVME_PR_REGISTER_ACT_UNREG		= 1,
+	NVME_PR_REGISTER_ACT_REPLACE		= 1 << 1,
+};
+
+enum nvme_pr_acquire_action {
+	NVME_PR_ACQUIRE_ACT_ACQUIRE		= 0,
+	NVME_PR_ACQUIRE_ACT_PREEMPT		= 1,
+	NVME_PR_ACQUIRE_ACT_PREEMPT_AND_ABORT	= 1 << 1,
+};
+
+enum nvme_pr_release_action {
+	NVME_PR_RELEASE_ACT_RELEASE		= 0,
+	NVME_PR_RELEASE_ACT_CLEAR		= 1,
+};
+
 #endif /* _LINUX_NVME_H */