[PATCH net-next 6/8] net: ena: Update PHC admin interface for error bound support

[Arthur Kiyanovski <akiyano@amazon.com>]

Extend the ENA admin interface to support error bound.

Add error_bound to the PHC response structure.
Introduce a feature version mechanism to indicate device supports
error_bound, and add an error flag for error_bound retrieval failures.

This enables the driver to retrieve error_bound information from the
device alongside timestamps.

Signed-off-by: Amit Bernstein <amitbern@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
---
 .../net/ethernet/amazon/ena/ena_admin_defs.h    | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_admin_defs.h b/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
index 898ecd9..2d132c4 100644
--- a/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
+++ b/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
@@ -128,12 +128,14 @@ enum ena_admin_get_stats_scope {
 	ENA_ADMIN_ETH_TRAFFIC                       = 1,
 };
 
-enum ena_admin_phc_type {
-	ENA_ADMIN_PHC_TYPE_READLESS                 = 0,
+enum ena_admin_phc_feature_version {
+	/* Readless with error_bound */
+	ENA_ADMIN_PHC_FEATURE_VERSION_0             = 0,
 };
 
 enum ena_admin_phc_error_flags {
 	ENA_ADMIN_PHC_ERROR_FLAG_TIMESTAMP   = BIT(0),
+	ENA_ADMIN_PHC_ERROR_FLAG_ERROR_BOUND = BIT(1),
 };
 
 /* ENA SRD configuration for ENI */
@@ -1035,10 +1037,10 @@ struct ena_admin_queue_ext_feature_desc {
 };
 
 struct ena_admin_feature_phc_desc {
-	/* PHC type as defined in enum ena_admin_get_phc_type,
-	 * used only for GET command.
+	/* PHC version as defined in enum ena_admin_phc_feature_version,
+	 * used only for GET command as max supported PHC version by the device.
 	 */
-	u8 type;
+	u8 version;
 
 	/* Reserved - MBZ */
 	u8 reserved1[3];
@@ -1224,7 +1226,10 @@ struct ena_admin_phc_resp {
 	/* PHC timestamp (nsec) */
 	u64 timestamp;
 
-	u8 reserved2[12];
+	u8 reserved2[8];
+
+	/* Timestamp error limit (nsec) */
+	u32 error_bound;
 
 	/* Bit field of enum ena_admin_phc_error_flags */
 	u32 error_flags;
-- 
2.47.3