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authorMichal Kubecek <mkubecek@suse.cz>2020-03-28 02:01:58 +0300
committerDavid S. Miller <davem@davemloft.net>2020-03-30 08:32:37 +0300
commit5b071c59ede04db200d9eccb97701261461e89bf (patch)
treec1f74f356a90c2cc80fbf14e06981ffd1a89b2f9 /Documentation/networking/ethtool-netlink.rst
parentf76510b458a52023e96b3a700a97ffb526de17dc (diff)
downloadlinux-5b071c59ede04db200d9eccb97701261461e89bf.tar.xz
ethtool: provide timestamping information with TSINFO_GET request
Implement TSINFO_GET request to get timestamping information for a network device. This is traditionally available via ETHTOOL_GET_TS_INFO ioctl request. Move part of ethtool_get_ts_info() into common.c so that ioctl and netlink code use the same logic to get timestamping information from the device. v3: use "TSINFO" rather than "TIMESTAMP", suggested by Richard Cochran Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking/ethtool-netlink.rst')
-rw-r--r--Documentation/networking/ethtool-netlink.rst30
1 files changed, 29 insertions, 1 deletions
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index f1950a0a6c93..567326491f80 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -203,6 +203,7 @@ Userspace to kernel:
``ETHTOOL_MSG_PAUSE_SET`` set pause parameters
``ETHTOOL_MSG_EEE_GET`` get EEE settings
``ETHTOOL_MSG_EEE_SET`` set EEE settings
+ ``ETHTOOL_MSG_TSINFO_GET`` get timestamping info
===================================== ================================
Kernel to userspace:
@@ -233,6 +234,7 @@ Kernel to userspace:
``ETHTOOL_MSG_PAUSE_NTF`` pause parameters
``ETHTOOL_MSG_EEE_GET_REPLY`` EEE settings
``ETHTOOL_MSG_EEE_NTF`` EEE settings
+ ``ETHTOOL_MSG_TSINFO_GET_REPLY`` timestamping info
===================================== =================================
``GET`` requests are sent by userspace applications to retrieve device
@@ -928,6 +930,32 @@ but only first 32 can be set at the moment as that is what the ``ethtool_ops``
callback supports.
+TSINFO_GET
+==========
+
+Gets timestamping information like ``ETHTOOL_GET_TS_INFO`` ioctl request.
+
+Request contents:
+
+ ===================================== ====== ==========================
+ ``ETHTOOL_A_TSINFO_HEADER`` nested request header
+ ===================================== ====== ==========================
+
+Kernel response contents:
+
+ ===================================== ====== ==========================
+ ``ETHTOOL_A_TSINFO_HEADER`` nested request header
+ ``ETHTOOL_A_TSINFO_TIMESTAMPING`` bitset SO_TIMESTAMPING flags
+ ``ETHTOOL_A_TSINFO_TX_TYPES`` bitset supported Tx types
+ ``ETHTOOL_A_TSINFO_RX_FILTERS`` bitset supported Rx filters
+ ``ETHTOOL_A_TSINFO_PHC_INDEX`` u32 PTP hw clock index
+ ===================================== ====== ==========================
+
+``ETHTOOL_A_TSINFO_PHC_INDEX`` is absent if there is no associated PHC (there
+is no special value for this case). The bitset attributes are omitted if they
+would be empty (no bit set).
+
+
Request translation
===================
@@ -1003,7 +1031,7 @@ have their netlink replacement yet.
``ETHTOOL_SET_DUMP`` n/a
``ETHTOOL_GET_DUMP_FLAG`` n/a
``ETHTOOL_GET_DUMP_DATA`` n/a
- ``ETHTOOL_GET_TS_INFO`` n/a
+ ``ETHTOOL_GET_TS_INFO`` ``ETHTOOL_MSG_TSINFO_GET``
``ETHTOOL_GMODULEINFO`` n/a
``ETHTOOL_GMODULEEEPROM`` n/a
``ETHTOOL_GEEE`` ``ETHTOOL_MSG_EEE_GET``