On Fri, Dec 01, 2023 at 06:10:24PM +0100, Kory Maincent wrote: > In the current PSE interface for Ethernet Power Equipment, support is > limited to PoDL. This patch extends the interface to accommodate the > objects specified in IEEE 802.3-2022 145.2 for Power sourcing > Equipment (PSE). > > The following objects are now supported and considered mandatory: > - IEEE 802.3-2022 30.9.1.1.5 aPSEPowerDetectionStatus > - IEEE 802.3-2022 30.9.1.1.2 aPSEAdminState > - IEEE 802.3-2022 30.9.1.2.1 aPSEAdminControl > > To avoid confusion between "PoDL PSE" and "PoE PSE", which have similar > names but distinct values, we have followed the suggestion of Oleksij > Rempel and Andrew Lunn to maintain separate naming schemes for each, > using c33 (clause 33) prefix for "PoE PSE". > You can find more details in the discussion threads here: > https://lore.kernel.org/netdev/20230912110637.GI780075@xxxxxxxxxxxxxx/ > https://lore.kernel.org/netdev/2539b109-72ad-470a-9dae-9f53de4f64ec@xxxxxxx/ > > Sponsored-by: Dent Project <dentproject@xxxxxxxxxxxxxxxxxxx> > Signed-off-by: Kory Maincent <kory.maincent@xxxxxxxxxxx> > --- > > Changes in v2: > - Rename all the PoE variables and enum with a c33 prefix. > - Add documentation, thanks to Oleksij for having written one. > --- > Documentation/networking/pse-pd/introduction.rst | 73 ++++++++++++++++++++++++ > include/linux/pse-pd/pse.h | 9 +++ > include/uapi/linux/ethtool.h | 43 ++++++++++++++ > include/uapi/linux/ethtool_netlink.h | 3 + > 4 files changed, 128 insertions(+) > > diff --git a/Documentation/networking/pse-pd/introduction.rst b/Documentation/networking/pse-pd/introduction.rst > new file mode 100644 > index 000000000000..e213083b9aff > --- /dev/null > +++ b/Documentation/networking/pse-pd/introduction.rst > @@ -0,0 +1,73 @@ > +.. SPDX-License-Identifier: GPL-2.0 > + > +Power Sourcing Equipment (PSE) in IEEE 802.3 Standard > +===================================================== > + > +Overview > +-------- > + > +Power Sourcing Equipment (PSE) is essential in networks for delivering power > +along with data over Ethernet cables. It usually refers to devices like > +switches and hubs that supply power to Powered Devices (PDs) such as IP > +cameras, VoIP phones, and wireless access points. > + > +PSE vs. PoDL PSE > +---------------- > + > +PSE in the IEEE 802.3 standard generally refers to equipment that provides > +power alongside data over Ethernet cables, typically associated with Power over > +Ethernet (PoE). > + > +PoDL PSE, or Power over Data Lines PSE, specifically denotes PSEs operating > +with single balanced twisted-pair PHYs, as per Clause 104 of IEEE 802.3. PoDL > +is significant in contexts like automotive and industrial controls where power > +and data delivery over a single pair is advantageous. > + > +IEEE 802.3-2018 Addendums and Related Clauses > +---------------------------------------------- > + > +Key addenda to the IEEE 802.3-2018 standard relevant to power delivery over > +Ethernet are as follows: > + > +- **802.3af (Approved in 2003-06-12)**: Known as PoE in the market, detailed in > + Clause 33, delivering up to 15.4W of power. > +- **802.3at (Approved in 2009-09-11)**: Marketed as PoE+, enhancing PoE as > + covered in Clause 33, increasing power delivery to up to 30W. > +- **802.3bt (Approved in 2018-09-27)**: Known as 4PPoE in the market, outlined > + in Clause 33. Type 3 delivers up to 60W, and Type 4 up to 100W. > +- **802.3bu (Approved in 2016-12-07)**: Formerly referred to as PoDL, detailed > + in Clause 104. Introduces Classes 0 - 9. Class 9 PoDL PSE delivers up to ~65W > + > +Kernel Naming Convention Recommendations > +---------------------------------------- > + > +For clarity and consistency within the Linux kernel's networking subsystem, the > +following naming conventions are recommended: > + > +- For general PSE (PoE) code, use "c33_pse" key words. For example: > + ``enum ethtool_c33_pse_admin_state c33_admin_control;``. > + This aligns with Clause 33, encompassing various PoE forms. > + > +- For PoDL PSE - specific code, use "podl_pse". For example: > + ``enum ethtool_podl_pse_admin_state podl_admin_control;`` to differentiate > + PoDL PSE settings according to Clause 104. > + > +Summary of Clause 33: Data Terminal Equipment (DTE) Power via Media Dependent Interface (MDI) > +------------------------------------------------------------------------------------------- > + > +Clause 33 of the IEEE 802.3 standard defines the functional and electrical > +characteristics of Powered Device (PD) and Power Sourcing Equipment (PSE). > +These entities enable power delivery using the same generic cabling as for data > +transmission, integrating power with data communication for devices such as > +10BASE-T, 100BASE-TX, or 1000BASE-T. > + > +Summary of Clause 104: Power over Data Lines (PoDL) of Single Balanced Twisted-Pair Ethernet > +------------------------------------------------------------------------------------------- > + > +Clause 104 of the IEEE 802.3 standard delineates the functional and electrical > +characteristics of PoDL Powered Devices (PDs) and PoDL Power Sourcing Equipment > +(PSEs). These are designed for use with single balanced twisted-pair Ethernet > +Physical Layers. In this clause, 'PSE' refers specifically to PoDL PSE, and > +'PD' to PoDL PD. The key intent is to provide devices with a unified interface > +for both data and the power required to process this data over a single > +balanced twisted-pair Ethernet connection. I get many htmldocs warnings: ``` Documentation/networking/pse-pd/introduction.rst:56: WARNING: Title underline too short. Summary of Clause 33: Data Terminal Equipment (DTE) Power via Media Dependent Interface (MDI) ------------------------------------------------------------------------------------------- Documentation/networking/pse-pd/introduction.rst:56: WARNING: Title underline too short. Summary of Clause 33: Data Terminal Equipment (DTE) Power via Media Dependent Interface (MDI) ------------------------------------------------------------------------------------------- Documentation/networking/pse-pd/introduction.rst:65: WARNING: Title underline too short. Summary of Clause 104: Power over Data Lines (PoDL) of Single Balanced Twisted-Pair Ethernet ------------------------------------------------------------------------------------------- Documentation/networking/pse-pd/introduction.rst:65: WARNING: Title underline too short. Summary of Clause 104: Power over Data Lines (PoDL) of Single Balanced Twisted-Pair Ethernet ------------------------------------------------------------------------------------------- looking for now-outdated files... none found pickling environment... done checking consistency... Documentation/networking/pse-pd/introduction.rst: WARNING: document isn't included in any toctree ``` I have to fix them up: ---- >8 ---- diff --git a/Documentation/networking/index.rst b/Documentation/networking/index.rst index 683eb42309cc5b..3900c6885cfc7d 100644 --- a/Documentation/networking/index.rst +++ b/Documentation/networking/index.rst @@ -88,6 +88,7 @@ Contents: phonet pktgen plip + pse-pd/index ppp_generic proc_net_tcp radiotap-headers diff --git a/Documentation/networking/pse-pd/index.rst b/Documentation/networking/pse-pd/index.rst new file mode 100644 index 00000000000000..18197bc7303dc9 --- /dev/null +++ b/Documentation/networking/pse-pd/index.rst @@ -0,0 +1,9 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Power Sourcing Equipment (PSE) Documentation +============================================ + +.. toctree:: + :maxdepth: 2 + + introduction diff --git a/Documentation/networking/pse-pd/introduction.rst b/Documentation/networking/pse-pd/introduction.rst index e213083b9aff2d..e3d3faaef717f2 100644 --- a/Documentation/networking/pse-pd/introduction.rst +++ b/Documentation/networking/pse-pd/introduction.rst @@ -24,7 +24,7 @@ is significant in contexts like automotive and industrial controls where power and data delivery over a single pair is advantageous. IEEE 802.3-2018 Addendums and Related Clauses ----------------------------------------------- +--------------------------------------------- Key addenda to the IEEE 802.3-2018 standard relevant to power delivery over Ethernet are as follows: @@ -53,7 +53,7 @@ following naming conventions are recommended: PoDL PSE settings according to Clause 104. Summary of Clause 33: Data Terminal Equipment (DTE) Power via Media Dependent Interface (MDI) -------------------------------------------------------------------------------------------- +--------------------------------------------------------------------------------------------- Clause 33 of the IEEE 802.3 standard defines the functional and electrical characteristics of Powered Device (PD) and Power Sourcing Equipment (PSE). @@ -62,7 +62,7 @@ transmission, integrating power with data communication for devices such as 10BASE-T, 100BASE-TX, or 1000BASE-T. Summary of Clause 104: Power over Data Lines (PoDL) of Single Balanced Twisted-Pair Ethernet -------------------------------------------------------------------------------------------- +-------------------------------------------------------------------------------------------- Clause 104 of the IEEE 802.3 standard delineates the functional and electrical characteristics of PoDL Powered Devices (PDs) and PoDL Power Sourcing Equipment Thanks. -- An old man doll... just what I always wanted! - Clara
Attachment:
signature.asc
Description: PGP signature
