[PATCH v2 08/20] nvme: Add helper to convert to a pr_ops PR type

[Mike Christie <michael.christie@oracle.com>]

This adds a helper to go from the NVMe spec PR type value to the block
layer pr_type, so for Reservation Report support we can convert from its
value.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
---
 drivers/nvme/host/core.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 3f223641f321..0dc768ae0c16 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2064,6 +2064,26 @@ static int nvme_update_ns_info(struct nvme_ns *ns, struct nvme_ns_info *info)
 	}
 }
 
+static enum pr_type block_pr_type(u8 nvme_type)
+{
+	switch (nvme_type) {
+	case 1:
+		return PR_WRITE_EXCLUSIVE;
+	case 2:
+		return PR_EXCLUSIVE_ACCESS;
+	case 3:
+		return PR_WRITE_EXCLUSIVE_REG_ONLY;
+	case 4:
+		return PR_EXCLUSIVE_ACCESS_REG_ONLY;
+	case 5:
+		return PR_WRITE_EXCLUSIVE_ALL_REGS;
+	case 6:
+		return PR_EXCLUSIVE_ACCESS_ALL_REGS;
+	default:
+		return 0;
+	}
+}
+
 static char nvme_pr_type(enum pr_type type)
 {
 	switch (type) {
-- 
2.18.2