On Fri, Nov 24, 2023 at 04:03:42PM +0100, Ivan Vecera wrote: > Although the i40e supports so-called floating VEB (VEB without > an uplink connection to external network), this support is > broken. This functionality is currently unused (except debugfs) > but it will be used by subsequent series for switchdev mode > slow-path. Fix this by following: > > 1) Handle correctly floating VEB (VEB with uplink_seid == 0) > in i40e_reconstitute_veb() and look for owner VSI and > create it only for non-floating VEBs and also set bridge > mode only for such VEBs as the floating ones are using > always VEB mode. > 2) Handle correctly floating VEB in i40e_veb_release() and > disallow its release when there are some VSIs. This is > different from regular VEB that have owner VSI that is > connected to VEB's uplink after VEB deletion by FW. > 3) Fix i40e_add_veb() to handle 'vsi' that is NULL for floating > VEBs. For floating VEB use 0 for downlink SEID and 'true' > for 'default_port' parameters as per datasheet. > 4) Fix 'add relay' command in i40e_dbg_command_write() to allow > to create floating VEB by 'add relay 0 0' or 'add relay' > > Tested using debugfs: > 1) Initial state > [root@host net-next]# echo dump switch > $CMD > [root@host net-next]# dmesg -c > [ 173.701286] i40e 0000:02:00.0: header: 3 reported 3 total > [ 173.706701] i40e 0000:02:00.0: type=19 seid=392 uplink=160 downlink=16 > [ 173.713241] i40e 0000:02:00.0: type=17 seid=160 uplink=2 downlink=0 > [ 173.719507] i40e 0000:02:00.0: type=19 seid=390 uplink=160 downlink=16 > > 2) Add floating VEB > [root@host net-next]# CMD="/sys/kernel/debug/i40e/0000:02:00.0/command" > [root@host net-next]# echo add relay > $CMD > [root@host net-next]# dmesg -c > [ 245.551720] i40e 0000:02:00.0: added relay 162 > [root@host net-next]# echo dump switch > $CMD > [root@host net-next]# dmesg -c > [ 276.984371] i40e 0000:02:00.0: header: 4 reported 4 total > [ 276.989779] i40e 0000:02:00.0: type=19 seid=392 uplink=160 downlink=16 > [ 276.996302] i40e 0000:02:00.0: type=17 seid=160 uplink=2 downlink=0 > [ 277.002569] i40e 0000:02:00.0: type=19 seid=390 uplink=160 downlink=16 > [ 277.009091] i40e 0000:02:00.0: type=17 seid=162 uplink=0 downlink=0 > > 3) Add VMDQ2 VSI to this new VEB > [root@host net-next]# echo add vsi 162 > $CMD > [root@host net-next]# dmesg -c > [ 332.314030] i40e 0000:02:00.0: added VSI 394 to relay 162 > [ 332.337486] enp2s0f0np0v0: NIC Link is Up, 40 Gbps Full Duplex, Flow > Control: None > [root@host net-next]# echo dump switch > $CMD > [root@host net-next]# dmesg -c > [ 387.284490] i40e 0000:02:00.0: header: 5 reported 5 total > [ 387.289904] i40e 0000:02:00.0: type=19 seid=394 uplink=162 downlink=16 > [ 387.296446] i40e 0000:02:00.0: type=17 seid=162 uplink=0 downlink=0 > [ 387.302708] i40e 0000:02:00.0: type=19 seid=392 uplink=160 downlink=16 > [ 387.309234] i40e 0000:02:00.0: type=17 seid=160 uplink=2 downlink=0 > [ 387.315500] i40e 0000:02:00.0: type=19 seid=390 uplink=160 downlink=16 > > 4) Try to delete the VEB > [root@host net-next]# echo del relay 162 > $CMD > [root@host net-next]# dmesg -c > [ 428.749297] i40e 0000:02:00.0: deleting relay 162 > [ 428.754011] i40e 0000:02:00.0: can't remove VEB 162 with 1 VSIs left > > 5) Do PF reset and check switch status after rebuild > [root@host net-next]# echo pfr > $CMD > [root@host net-next]# echo dump switch > $CMD > [root@host net-next]# dmesg -c > [ 738.056172] i40e 0000:02:00.0: header: 5 reported 5 total > [ 738.061577] i40e 0000:02:00.0: type=19 seid=394 uplink=162 downlink=16 > [ 738.068104] i40e 0000:02:00.0: type=17 seid=162 uplink=0 downlink=0 > [ 738.074367] i40e 0000:02:00.0: type=19 seid=392 uplink=160 downlink=16 > [ 738.080892] i40e 0000:02:00.0: type=17 seid=160 uplink=2 downlink=0 > [ 738.087160] i40e 0000:02:00.0: type=19 seid=390 uplink=160 downlink=16 > > 6) Delete VSI and delete VEB > [root@host net-next]# echo del vsi 394 > $CMD > [root@host net-next]# echo del relay 162 > $CMD > [root@host net-next]# echo dump switch > $CMD > [root@host net-next]# dmesg -c > [ 1233.081126] i40e 0000:02:00.0: deleting VSI 394 > [ 1239.345139] i40e 0000:02:00.0: deleting relay 162 > [ 1244.886920] i40e 0000:02:00.0: header: 3 reported 3 total > [ 1244.892328] i40e 0000:02:00.0: type=19 seid=392 uplink=160 downlink=16 > [ 1244.898853] i40e 0000:02:00.0: type=17 seid=160 uplink=2 downlink=0 > [ 1244.905119] i40e 0000:02:00.0: type=19 seid=390 uplink=160 downlink=16 > > Reviewed-by: Wojciech Drewek <wojciech.dre...@intel.com> > Signed-off-by: Ivan Vecera <ivec...@redhat.com>
Reviewed-by: Simon Horman <ho...@kernel.org> _______________________________________________ Intel-wired-lan mailing list Intel-wired-lan@osuosl.org https://lists.osuosl.org/mailman/listinfo/intel-wired-lan
