From b6b0e3667e1b2c796cd282d5ec385d5864ccb1ce Mon Sep 17 00:00:00 2001 From: Subbaraya Sundeep Date: Wed, 17 Mar 2021 19:05:37 +0530 Subject: [PATCH] octeontx2-af: Avoid duplicate unicast rule in mcam_rules list A mcam rule described by mcam_rule struct has all the info such as the hardware MCAM entry number, match criteria and corresponding action etc. All mcam rules are stored in a linked list mcam->rules. When adding/updating a rule to the mcam->rules it is checked if a rule already exists for the mcam entry. If the rule already exists, the same rule is updated instead of creating new rule. This way only one mcam_rule exists for the only one default unicast entry installed by AF. But a PF/VF can get different NIXLF (or default unicast entry number) after a attach-detach-attach sequence. When that happens mcam_rules list end up with two default unicast rules. Fix the problem by deleting the default unicast rule list node always when disabling mcam rules. Signed-off-by: Subbaraya Sundeep Signed-off-by: Naveen Mamindlapalli Signed-off-by: David S. Miller --- drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c | 4 +--- drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c | 9 ++++++--- 2 files changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c index f2a1c42..a871041 100644 --- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c @@ -3637,9 +3637,7 @@ int rvu_mbox_handler_nix_lf_stop_rx(struct rvu *rvu, struct msg_req *req, if (err) return err; - rvu_npc_disable_default_entries(rvu, pcifunc, nixlf); - - npc_mcam_disable_flows(rvu, pcifunc); + rvu_npc_disable_mcam_entries(rvu, pcifunc, nixlf); return rvu_cgx_start_stop_io(rvu, pcifunc, false); } diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c index 4c3f643..6cce7ec 100644 --- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c @@ -988,7 +988,7 @@ void rvu_npc_disable_mcam_entries(struct rvu *rvu, u16 pcifunc, int nixlf) { struct rvu_pfvf *pfvf = rvu_get_pfvf(rvu, pcifunc); struct npc_mcam *mcam = &rvu->hw->mcam; - struct rvu_npc_mcam_rule *rule; + struct rvu_npc_mcam_rule *rule, *tmp; int blkaddr; blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0); @@ -998,15 +998,18 @@ void rvu_npc_disable_mcam_entries(struct rvu *rvu, u16 pcifunc, int nixlf) mutex_lock(&mcam->lock); /* Disable MCAM entries directing traffic to this 'pcifunc' */ - list_for_each_entry(rule, &mcam->mcam_rules, list) { + list_for_each_entry_safe(rule, tmp, &mcam->mcam_rules, list) { if (is_npc_intf_rx(rule->intf) && rule->rx_action.pf_func == pcifunc) { npc_enable_mcam_entry(rvu, mcam, blkaddr, rule->entry, false); rule->enable = false; /* Indicate that default rule is disabled */ - if (rule->default_rule) + if (rule->default_rule) { pfvf->def_ucast_rule = NULL; + list_del(&rule->list); + kfree(rule); + } } } -- 2.7.4