On 08/14/2017 03:22 PM, Vivien Didelot wrote:
> This patch series adds a generic debugfs interface for the DSA
> framework, so that all switch devices benefit from it, e.g. Marvell,
> Broadcom, Microchip or any other DSA driver.
>
> This is really convenient for debugging, especially CPU ports and DSA
> links which are not exposed to userspace as net device. This interface
> is currently the only way to easily inspect the hardware for such ports.
>
> With the patch series, any switch device user is able to query the
> hardware for the supported tagging protocol, the ports stats and
> registers, as well as their FDB, MDB and VLAN entries.
>
> This support is only compiled if CONFIG_DEBUG_FS is enabled. Below is
> and example of usage of this interface on a multi-chip switch fabric:
>
> # mount -t debugfs none /sys/kernel/debug
> # cd /sys/kernel/debug/dsa/
> # ls
> switch0 switch1 switch2
> # ls -l switch0/
> drwxr-xr-x 2 root root 0 Jan 1 00:00 port0
> drwxr-xr-x 2 root root 0 Jan 1 00:00 port1
> drwxr-xr-x 2 root root 0 Jan 1 00:00 port2
> drwxr-xr-x 2 root root 0 Jan 1 00:00 port5
> drwxr-xr-x 2 root root 0 Jan 1 00:00 port6
> -r--r--r-- 1 root root 0 Jan 1 00:00 tag_protocol
> -r--r--r-- 1 root root 0 Jan 1 00:00 tree
> # ls -l switch0/port6
> -r--r--r-- 1 root root 0 Jan 1 00:00 fdb
> -r--r--r-- 1 root root 0 Jan 1 00:00 mdb
> -r--r--r-- 1 root root 0 Jan 1 00:00 regs
> -r--r--r-- 1 root root 0 Jan 1 00:00 stats
> -r--r--r-- 1 root root 0 Jan 1 00:00 vlan
> # cat switch0/port2/vlan
> vid 42 pvid untagged
> # cat switch0/port1/fdb
> vid 0 12:34:56:78:90:ab static unicast
> # pr -mt switch0/port{5,6}/stats
> in_good_octets : 0 in_good_octets : 13824
> in_bad_octets : 0 in_bad_octets : 0
> in_unicast : 0 in_unicast : 0
> in_broadcasts : 0 in_broadcasts : 216
> in_multicasts : 0 in_multicasts : 0
> in_pause : 0 in_pause : 0
> in_undersize : 0 in_undersize : 0
> ...
> # pr -mt switch0/port{5,6}/regs
> 0: 4e07 0: 4d04
> 1: 403e 1: 003d
> 2: 0000 2: 0000
> 3: 3521 3: 3521
> 4: 0533 4: 373f
> 5: 8000 5: 0000
> 6: 005f 6: 003f
> 7: 002a 7: 002a
> ...
>
> where switch0 port5 and port6 are CPU and DSA ports of a ZII Rev B.
For this whole series:
Tested-by: Florian Fainelli <f.faine...@gmail.com>
On bcm_sf2
>
> Vivien Didelot (11):
> net: dsa: legacy: assign dst->applied
> net: dsa: add debugfs interface
> net: dsa: debugfs: add tree
> net: dsa: debugfs: add tag_protocol
> net: dsa: debugfs: add port stats
> net: dsa: debugfs: add port registers
> net: dsa: debugfs: add port fdb
> net: dsa: restore mdb dump
> net: dsa: debugfs: add port mdb
> net: dsa: restore VLAN dump
> net: dsa: debugfs: add port vlan
>
> drivers/net/dsa/b53/b53_common.c | 41 +++
> drivers/net/dsa/b53/b53_priv.h | 2 +
> drivers/net/dsa/bcm_sf2.c | 1 +
> drivers/net/dsa/dsa_loop.c | 38 +++
> drivers/net/dsa/microchip/ksz_common.c | 41 +++
> drivers/net/dsa/mv88e6xxx/chip.c | 82 +++++-
> include/net/dsa.h | 15 ++
> net/dsa/Kconfig | 14 +
> net/dsa/Makefile | 1 +
> net/dsa/debugfs.c | 453
> +++++++++++++++++++++++++++++++++
> net/dsa/dsa.c | 3 +
> net/dsa/dsa2.c | 4 +
> net/dsa/dsa_priv.h | 13 +
> net/dsa/legacy.c | 7 +
> 14 files changed, 707 insertions(+), 8 deletions(-)
> create mode 100644 net/dsa/debugfs.c
>
--
Florian
