From: David S. Miller Date: Mon, 1 May 2017 19:03:14 +0000 (-0400) Subject: Merge branch 'dsa-mv88e6xxx-802.1s-and-88E6390-VTU' X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=aaf1be31b2ef1e51f3802373a7c6ca07605e51d1;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git Merge branch 'dsa-mv88e6xxx-802.1s-and-88E6390-VTU' Vivien Didelot says: ==================== net: dsa: mv88e6xxx: 802.1s and 88E6390 VTU This patch series adds support for the VLAN Table Unit (a.k.a. the VTU) to the 88E6390 family of Marvell Ethernet switch chips. The plumbing for the per VLAN Spanning Tree support is added as a side effect of the necessary refactoring. The patchset is split up so that no duplication of code is introduced. With this patchset applied, the mv88e6xxx driver has 2 new function pointers for the VTU GetNext and VTU Load/Purge operations (with 3 implementations), both handling programmation of 802.1q and 802.1s. On a ZII Rev C board (featuring 2 88E6390X chips) with all ports bridged together, we obtain the following hardware VLAN configuration: # cat /sys/class/net/br0/bridge/vlan_filtering 1 # cat /sys/class/net/br0/bridge/default_pvid 42 # bridge vlan add dev lan3 vid 666 # bridge vlan show port vlan ids lan1 42 PVID Egress Untagged lan1 42 PVID Egress Untagged lan2 42 PVID Egress Untagged lan2 42 PVID Egress Untagged lan3 42 PVID Egress Untagged 666 lan3 42 PVID Egress Untagged 666 lan4 42 PVID Egress Untagged lan4 42 PVID Egress Untagged lan5 42 PVID Egress Untagged lan5 42 PVID Egress Untagged lan6 42 PVID Egress Untagged lan6 42 PVID Egress Untagged lan7 42 PVID Egress Untagged lan7 42 PVID Egress Untagged lan8 42 PVID Egress Untagged lan8 42 PVID Egress Untagged br0 42 PVID Egress Untagged Below are the technical details for the different implementations. All switch families have up to 3 dedicated VTU Data registers used to program 802.1q and 802.1s, both using 2-bit values. On 88E6185 and 88E6352 families, port membership and state are adjacent, while the 88E6390 family share the same bits: Bits 88E6185/88E6352 88E6390 ----- ----------------- -------------------------- 0-1 Port 0 membership Port 0 membership or state 2-3 Port 0 state Port 1 membership or state 4-5 Port 1 membership Port 2 membership or state 6-7 Port 1 state Port 3 membership or state 8-9 Port 2 membership Port 4 membership or state 10-11 Port 2 state Port 5 membership or state ... ... ... The 88E6185 family programs all ports membership and state in a single VTU GetNext or Load/Purge operation. The 88E6352 family introduced an indirect Spanning Tree Unit table (a.k.a. STU) which requires additional STU GetNext and Load/Purge operations to read and write the ports state bits. The 88E6390 family also has an STU and requires data bits to be accessed before and after every single VTU or STU operation. Finally, the 88E6390 family introduced a 13th bit for the VLAN ID, which must be taken care of regardless the VTU operating mode. This means that iterating over the VTU now starts or ends with value 8191, not 4095. Patch 1 adds a max_vid field to the chip info structure. Patch 2 adds 802.1q and 802.1s data to the generic VTU entry structure. Patches 3 to 10 move helpers to a dedicated file (later made static). Patches 11 and 12 abstract handling of the STU behind VTU operations. Patches 13 and 14 add the new function pointers for VTU operations. Patches 15 and 18 polish the VTU code and add VTU support for 88E6390. Changes in v2: - add Reviewed-by tags - fix comments in 8/18 ==================== Signed-off-by: David S. Miller --- aaf1be31b2ef1e51f3802373a7c6ca07605e51d1