nvme: Add the DHCHAP maximum HD IDs

In preperation for using DHCHAP length in upcoming host and target
patches let's add the hash and diffie-hellman ID length macros.

Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Yunje Shin <[email protected]>
Reviewed-by: Hannes Reinecke <[email protected]>
Reviewed-by: Chris Leech <[email protected]>
Signed-off-by: Alistair Francis <[email protected]>
Signed-off-by: Keith Busch <[email protected]>

Author: alistair23

include/linux/nvme.h

@@ -2348,4 +2348,8 @@ enum nvme_pr_change_ptpl {
 
 #define NVME_PR_IGNORE_KEY (1 << 3)
 
+/* Section 8.3.4.5.2 of the NVMe 2.1 */
+#define NVME_AUTH_DHCHAP_MAX_HASH_IDS 30
+#define NVME_AUTH_DHCHAP_MAX_DH_IDS 30
+
 #endif /* _LINUX_NVME_H */