From 09e8f0f93491c6be867f32d4edc0b16fb5da785e Mon Sep 17 00:00:00 2001
From: Alistair Francis <alistair.francis@wdc.com>
Date: Fri, 20 Mar 2026 10:20:44 +1000
Subject: 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 <hch@lst.de>
Reviewed-by: Yunje Shin <ioerts@kookmin.ac.kr>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Chris Leech <cleech@redhat.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
---
 include/linux/nvme.h | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'include')

diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index 2b66a86d7da6..041f30931a90 100644
--- a/include/linux/nvme.h
+++ b/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 */
-- 
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