octeontx2-af: Drop rules for NPC MCAM

NPC exact match table installs drop on hit rules in
NPC mcam for each channel. This rule has broadcast and multicast
bits cleared. Exact match bit cleared and channel bits
set. If exact match table hit bit is 0, corresponding NPC mcam
drop rule will be hit for the packet and will be dropped.

Signed-off-by: Ratheesh Kannoth <rkannoth@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 36 insertions, 1 deletions

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
index 86cf5794490f..583ead4dd246 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
@@ -1106,6 +1106,34 @@ void rvu_npc_disable_default_entries(struct rvu *rvu, u16 pcifunc, int nixlf)
 				     NIXLF_PROMISC_ENTRY, false);
 }
 
+bool rvu_npc_enable_mcam_by_entry_index(struct rvu *rvu, int entry, int intf, bool enable)
+{
+	int blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0);
+	struct npc_mcam *mcam = &rvu->hw->mcam;
+	struct rvu_npc_mcam_rule *rule, *tmp;
+
+	mutex_lock(&mcam->lock);
+
+	list_for_each_entry_safe(rule, tmp, &mcam->mcam_rules, list) {
+		if (rule->intf != intf)
+			continue;
+
+		if (rule->entry != entry)
+			continue;
+
+		rule->enable = enable;
+		mutex_unlock(&mcam->lock);
+
+		npc_enable_mcam_entry(rvu, mcam, blkaddr,
+				      entry, enable);
+
+		return true;
+	}
+
+	mutex_unlock(&mcam->lock);
+	return false;
+}
+
 void rvu_npc_enable_default_entries(struct rvu *rvu, u16 pcifunc, int nixlf)
 {
 	/* Enables only broadcast match entry. Promisc/Allmulti are enabled
@@ -1816,7 +1844,6 @@ static int npc_mcam_rsrcs_init(struct rvu *rvu, int blkaddr)
 	mcam->hprio_count = mcam->lprio_count;
 	mcam->hprio_end = mcam->hprio_count;
 
-
 	/* Allocate bitmap for managing MCAM counters and memory
 	 * for saving counter to RVU PFFUNC allocation mapping.
 	 */
@@ -2560,6 +2587,14 @@ alloc:
 	return 0;
 }
 
+/* Marks bitmaps to reserved the mcam slot */
+void npc_mcam_rsrcs_reserve(struct rvu *rvu, int blkaddr, int entry_idx)
+{
+	struct npc_mcam *mcam = &rvu->hw->mcam;
+
+	npc_mcam_set_bit(mcam, entry_idx);
+}
+
 int rvu_mbox_handler_npc_mcam_alloc_entry(struct rvu *rvu,
 					  struct npc_mcam_alloc_entry_req *req,
 					  struct npc_mcam_alloc_entry_rsp *rsp)