From mboxrd@z Thu Jan  1 00:00:00 1970
From: maxg@mellanox.com (Max Gurtovoy)
Date: Sun, 27 May 2018 18:50:07 +0300
Subject: [PATCH 02/17] RDMA/core: introduce check masks for T10-PI offload
In-Reply-To: <1527436222-15494-1-git-send-email-maxg@mellanox.com>
References: <1527436222-15494-1-git-send-email-maxg@mellanox.com>
Message-ID: <1527436222-15494-3-git-send-email-maxg@mellanox.com>

T10-PI offload capability is currently supported in iSER protocol only,
and the definition of the HCA protection information checks are missing
from the core layer. Add those definition to avoid code duplication in
other drivers (such iSER target and NVMeoF).

Signed-off-by: Max Gurtovoy <maxg at mellanox.com>
---
 include/rdma/ib_verbs.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 9fc8a82..bdb1bbc 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -861,6 +861,19 @@ enum ib_sig_err_type {
 };
 
 /**
+ * Signature check masks (8 bytes in total) according to the T10-PI standard:
+ *  -------- -------- ------------
+ * | GUARD  | APPTAG |   REFTAG   |
+ * |  2B    |  2B    |    4B      |
+ *  -------- -------- ------------
+ */
+enum {
+	IB_SIG_CHECK_GUARD = 0xc0,
+	IB_SIG_CHECK_APPTAG = 0x30,
+	IB_SIG_CHECK_REFTAG = 0x0f,
+};
+
+/**
  * struct ib_sig_err - signature error descriptor
  */
 struct ib_sig_err {
-- 
1.8.3.1