diff options
Diffstat (limited to 'drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c')
| -rw-r--r-- | drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c | 33 |
1 files changed, 22 insertions, 11 deletions
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c index e8b73b9d7..97722ce8c 100644 --- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c @@ -2519,7 +2519,17 @@ static int npc_mcam_alloc_entries(struct npc_mcam *mcam, u16 pcifunc, * - when available free entries are less. * Lower priority ones out of avaialble free entries are always * chosen when 'high vs low' question arises. + * + * For a VF base MCAM match rule is set by its PF. And all the + * further MCAM rules installed by VF on its own are + * concatenated with the base rule set by its PF. Hence PF entries + * should be at lower priority compared to VF entries. Otherwise + * base rule is hit always and rules installed by VF will be of + * no use. Hence if the request is from PF then allocate low + * priority entries. */ + if (!(pcifunc & RVU_PFVF_FUNC_MASK)) + goto lprio_alloc; /* Get the search range for priority allocation request */ if (req->priority) { @@ -2528,17 +2538,6 @@ static int npc_mcam_alloc_entries(struct npc_mcam *mcam, u16 pcifunc, goto alloc; } - /* For a VF base MCAM match rule is set by its PF. And all the - * further MCAM rules installed by VF on its own are - * concatenated with the base rule set by its PF. Hence PF entries - * should be at lower priority compared to VF entries. Otherwise - * base rule is hit always and rules installed by VF will be of - * no use. Hence if the request is from PF and NOT a priority - * allocation request then allocate low priority entries. - */ - if (!(pcifunc & RVU_PFVF_FUNC_MASK)) - goto lprio_alloc; - /* Find out the search range for non-priority allocation request * * Get MCAM free entry count in middle zone. @@ -2568,6 +2567,18 @@ lprio_alloc: reverse = true; start = 0; end = mcam->bmap_entries; + /* Ensure PF requests are always at bottom and if PF requests + * for higher/lower priority entry wrt reference entry then + * honour that criteria and start search for entries from bottom + * and not in mid zone. + */ + if (!(pcifunc & RVU_PFVF_FUNC_MASK) && + req->priority == NPC_MCAM_HIGHER_PRIO) + end = req->ref_entry; + + if (!(pcifunc & RVU_PFVF_FUNC_MASK) && + req->priority == NPC_MCAM_LOWER_PRIO) + start = req->ref_entry; } alloc: |