types: add enum for Protection Information Format

Add enum for Protection Information Format (PIF). Signed-off-by: Francis Pravin <[email protected]>
linux-nvme · May 31, 2024 · db3ff1a · db3ff1a
1 parent 7dfae44
commit db3ff1a
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Showing 2 changed files with 16 additions and 6 deletions.
diff --git a/src/nvme/ioctl.c b/src/nvme/ioctl.c
@@ -1674,13 +1674,11 @@ static int nvme_set_var_size_tags(__u32 *cmd_dw2, __u32 *cmd_dw3, __u32 *cmd_dw1
 	beint64_t be_storage_tag = cpu_to_be64(storage_tag);
 
 	switch (pif) {
-	/* 16b Protection Information */
-	case 0:
+	case NVME_NVM_PIF_16B_GUARD:
 		cdw14 = be_reftag & 0xffffffff;
 		cdw14 |= ((be_storage_tag << (32 - sts)) & 0xffffffff);
 		break;
-	/* 32b Protection Information */
-	case 1:
+	case NVME_NVM_PIF_32B_GUARD:
 		cdw14 = be_reftag & 0xffffffff;
 		cdw3 = be_reftag >> 32;
 		cdw14 |= ((be_storage_tag << (80 - sts)) & 0xffff0000);
@@ -1690,8 +1688,7 @@ static int nvme_set_var_size_tags(__u32 *cmd_dw2, __u32 *cmd_dw3, __u32 *cmd_dw1
 			cdw3 |= ((be_storage_tag << (48 - sts)) & 0xffffffff);
 		cdw2 = (be_storage_tag >> (sts - 16)) & 0xffff;
 		break;
-	/* 64b Protection Information */
-	case 2:
+	case NVME_NVM_PIF_64B_GUARD:
 		cdw14 = be_reftag & 0xffffffff;
 		cdw3 = (be_reftag >> 32) & 0xffff;
 		cdw14 |= ((be_storage_tag << (48 - sts)) & 0xffffffff);

diff --git a/src/nvme/types.h b/src/nvme/types.h
@@ -2338,6 +2338,19 @@ enum nvme_nvm_id_ns_elbaf {
 	NVME_NVM_ELBAF_PIF_MASK		= 3 << 7,
 };
 
+/**
+ * enum nvme_nvm_id_ns_pif - This field indicates the type of the Protection
+ *			     Information Format
+ * @NVME_NVM_PIF_16B_GUARD:	16-bit Guard Protection Information Format
+ * @NVME_NVM_PIF_32B_GUARD:	32-bit Guard Protection Information Format
+ * @NVME_NVM_PIF_64B_GUARD:	64-bit Guard Protection Information Format
+ */
+enum nvme_nvm_id_ns_pif {
+	NVME_NVM_PIF_16B_GUARD		= 0,
+	NVME_NVM_PIF_32B_GUARD		= 1,
+	NVME_NVM_PIF_64B_GUARD		= 2,
+};
+
 /**
  * enum nvme_id_ns_mc - This field indicates the capabilities for metadata.
  * @NVME_NS_MC_EXTENDED: If set, indicates the namespace supports the metadata