path: root/Documentation/networking
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authorRussell King <rmk+kernel@armlinux.org.uk>2020-01-03 20:43:17 +0000
committerDavid S. Miller <davem@davemloft.net>2020-01-05 15:05:35 -0800
commitc114574ebfdf42f826776f717c8056a00fa94881 (patch)
tree4c95a077aa4d3285ca81e6574f821ce83b8af5e6 /Documentation/networking
parentMerge branch 'ionic-add-sriov-support' (diff)
Recent discussion has revealed that the use of PHY_INTERFACE_MODE_10GKR is incorrect. Add a 10GBASE-R definition, document both the -R and -KR versions, and the fact that 10GKR was used incorrectly. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking')
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/networking/phy.rst b/Documentation/networking/phy.rst
index e0a7c7af6525..1e4735cc0553 100644
--- a/Documentation/networking/phy.rst
+++ b/Documentation/networking/phy.rst
@@ -267,6 +267,24 @@ Some of the interface modes are described below:
duplex, pause or other settings. This is dependent on the MAC and/or
PHY behaviour.
+ This is the IEEE 802.3 Clause 49 defined 10GBASE-R protocol used with
+ various different mediums. Please refer to the IEEE standard for a
+ definition of this.
+ Note: 10GBASE-R is just one protocol that can be used with XFI and SFI.
+ XFI and SFI permit multiple protocols over a single SERDES lane, and
+ also defines the electrical characteristics of the signals with a host
+ compliance board plugged into the host XFP/SFP connector. Therefore,
+ XFI and SFI are not PHY interface types in their own right.
+ This is the IEEE 802.3 Clause 49 defined 10GBASE-R with Clause 73
+ autonegotiation. Please refer to the IEEE standard for further
+ information.
+ Note: due to legacy usage, some 10GBASE-R usage incorrectly makes
+ use of this definition.
Pause frames / flow control