networking/dsa/dsa.rst

14 support Marvell Ethernet switches (MV88E6xxx, a.k.a. Link Street product
26 kinds of Ethernet switches found in Small Home and Office products: routers,
27 gateways, or even top-of-rack switches. This host Ethernet controller will
31 with the ability to configure and manage cascaded switches on top of each other
32 using upstream and downstream Ethernet links between switches. These specific
34 of multiple switches connected to each other is called a "switch tree".
50 The subsystem does support switches not capable of inserting/stripping tags, but
61 - the "dsa" port(s) are just conduits between two or more switches, and as such
120 From the perspective of the network stack, all switches within the same DSA
128 other switches from the same fabric, and in this case, the outermost switch
139 leaf switches that tagged them with the shorter DSA header. This can be done
144 It is possible to construct cascaded setups of DSA switches even if their
365 switches, these functions would utilize direct or indirect PHY addressing mode
370 For Ethernet switches which have both external and internal MDIO buses, the
373 PHYs, external PHYs, or even external switches.
384   table indication (when cascading switches)
387   a collection of dsa_chip_data structures if multiple switches are cascaded,
396   referenced to address individual switches in the tree.
420 - inability to configure specific VLAN IDs / trunking VLANs between switches
530 DSA switches are regular ``device`` structures on buses (be they platform, SPI,
568 Internally, DSA keeps an array of switch trees (group of switches) global to
573 same OF property (0 if missing). Registering multiple switches with the same
577 In case of a tree with multiple switches, probing takes place asymmetrically.
580 associated switch (``dp->ds``). Then, these switches exit their
586 all switches within that tree, all as part of the calling context of the last
671 - ``get_phy_flags``: Some switches are interfaced to various kinds of Ethernet PHYs,