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Date: Thu, 30 Nov 2023 05:23:12 +0000 From: "Pucha, HimasekharX Reddy" <himasekharx.reddy.pucha@...el.com> To: ivecera <ivecera@...hat.com>, "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org> CC: "Drewek, Wojciech" <wojciech.drewek@...el.com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "Brandeburg, Jesse" <jesse.brandeburg@...el.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Eric Dumazet <edumazet@...gle.com>, "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>, Simon Horman <horms@...nel.org>, "Keller, Jacob E" <jacob.e.keller@...el.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, "David S . Miller" <davem@...emloft.net> Subject: RE: [Intel-wired-lan] [PATCH v5 4/5] i40e: Fix broken support for floating VEBs > -----Original Message----- > From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of Ivan Vecera > Sent: Friday, November 24, 2023 8:34 PM > To: intel-wired-lan@...ts.osuosl.org > Cc: Drewek, Wojciech <wojciech.drewek@...el.com>; netdev@...r.kernel.org; Brandeburg, Jesse <jesse.brandeburg@...el.com>; linux-kernel@...r.kernel.org; Eric Dumazet <edumazet@...gle.com>; Nguyen, Anthony L <anthony.l.nguyen@...el.com>; Simon Horman <horms@...nel.org>; Keller, Jacob E <jacob.e.keller@...el.com>; Jakub Kicinski <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>; David S . Miller <davem@...emloft.net> > Subject: [Intel-wired-lan] [PATCH v5 4/5] i40e: Fix broken support for floating VEBs > > 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@...t net-next]# echo dump switch > $CMD > [root@...t 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@...t net-next]# CMD="/sys/kernel/debug/i40e/0000:02:00.0/command" > [root@...t net-next]# echo add relay > $CMD > [root@...t net-next]# dmesg -c > [ 245.551720] i40e 0000:02:00.0: added relay 162 > [root@...t net-next]# echo dump switch > $CMD > [root@...t 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@...t net-next]# echo add vsi 162 > $CMD > [root@...t 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@...t net-next]# echo dump switch > $CMD > [root@...t 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@...t net-next]# echo del relay 162 > $CMD > [root@...t 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@...t net-next]# echo pfr > $CMD > [root@...t net-next]# echo dump switch > $CMD > [root@...t 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@...t net-next]# echo del vsi 394 > $CMD > [root@...t net-next]# echo del relay 162 > $CMD > [root@...t net-next]# echo dump switch > $CMD > [root@...t 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.drewek@...el.com> > Signed-off-by: Ivan Vecera <ivecera@...hat.com> > --- > .../net/ethernet/intel/i40e/i40e_debugfs.c | 29 ++++--- > drivers/net/ethernet/intel/i40e/i40e_main.c | 87 ++++++++++--------- > 2 files changed, 67 insertions(+), 49 deletions(-) > Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@...el.com> (A Contingent worker at Intel)
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