1 files changed, 180 insertions, 43 deletions

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
index e8b73b9d75e3..da15bb451178 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
@@ -820,24 +820,6 @@ void rvu_npc_install_bcast_match_entry(struct rvu *rvu, u16 pcifunc,
 	rvu_mbox_handler_npc_install_flow(rvu, &req, &rsp);
 }
 
-void rvu_npc_enable_bcast_entry(struct rvu *rvu, u16 pcifunc, int nixlf,
-				bool enable)
-{
-	struct npc_mcam *mcam = &rvu->hw->mcam;
-	int blkaddr, index;
-
-	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0);
-	if (blkaddr < 0)
-		return;
-
-	/* Get 'pcifunc' of PF device */
-	pcifunc = pcifunc & ~RVU_PFVF_FUNC_MASK;
-
-	index = npc_get_nixlf_mcam_index(mcam, pcifunc, nixlf,
-					 NIXLF_BCAST_ENTRY);
-	npc_enable_mcam_entry(rvu, mcam, blkaddr, index, enable);
-}
-
 void rvu_npc_install_allmulti_entry(struct rvu *rvu, u16 pcifunc, int nixlf,
 				    u64 chan)
 {
@@ -1125,6 +1107,7 @@ void npc_enadis_default_mce_entry(struct rvu *rvu, u16 pcifunc,
 static void npc_enadis_default_entries(struct rvu *rvu, u16 pcifunc,
 				       int nixlf, bool enable)
 {
+	struct rvu_pfvf *pfvf = rvu_get_pfvf(rvu, pcifunc);
 	struct npc_mcam *mcam = &rvu->hw->mcam;
 	int index, blkaddr;
 
@@ -1133,9 +1116,12 @@ static void npc_enadis_default_entries(struct rvu *rvu, u16 pcifunc,
 		return;
 
 	/* Ucast MCAM match entry of this PF/VF */
-	index = npc_get_nixlf_mcam_index(mcam, pcifunc,
-					 nixlf, NIXLF_UCAST_ENTRY);
-	npc_enable_mcam_entry(rvu, mcam, blkaddr, index, enable);
+	if (npc_is_feature_supported(rvu, BIT_ULL(NPC_DMAC),
+				     pfvf->nix_rx_intf)) {
+		index = npc_get_nixlf_mcam_index(mcam, pcifunc,
+						 nixlf, NIXLF_UCAST_ENTRY);
+		npc_enable_mcam_entry(rvu, mcam, blkaddr, index, enable);
+	}
 
 	/* Nothing to do for VFs, on platforms where pkt replication
 	 * is not supported
@@ -2519,7 +2505,17 @@ 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 +2524,6 @@ 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 +2553,18 @@ 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:
@@ -2680,6 +2677,49 @@ void npc_mcam_rsrcs_reserve(struct rvu *rvu, int blkaddr, int entry_idx)
 	npc_mcam_set_bit(mcam, entry_idx);
 }
 
+int npc_config_cntr_default_entries(struct rvu *rvu, bool enable)
+{
+	struct npc_mcam *mcam = &rvu->hw->mcam;
+	struct npc_install_flow_rsp rsp;
+	struct rvu_npc_mcam_rule *rule;
+	int blkaddr;
+
+	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0);
+	if (blkaddr < 0)
+		return -EINVAL;
+
+	mutex_lock(&mcam->lock);
+	list_for_each_entry(rule, &mcam->mcam_rules, list) {
+		if (!is_mcam_entry_enabled(rvu, mcam, blkaddr, rule->entry))
+			continue;
+		if (!rule->default_rule)
+			continue;
+		if (enable && !rule->has_cntr) { /* Alloc and map new counter */
+			__rvu_mcam_add_counter_to_rule(rvu, rule->owner,
+						       rule, &rsp);
+			if (rsp.counter < 0) {
+				dev_err(rvu->dev,
+					"%s: Failed to allocate cntr for default rule (err=%d)\n",
+					__func__, rsp.counter);
+				break;
+			}
+			npc_map_mcam_entry_and_cntr(rvu, mcam, blkaddr,
+						    rule->entry, rsp.counter);
+			/* Reset counter before use */
+			rvu_write64(rvu, blkaddr,
+				    NPC_AF_MATCH_STATX(rule->cntr), 0x0);
+		}
+
+		/* Free and unmap counter */
+		if (!enable && rule->has_cntr)
+			__rvu_mcam_remove_counter_from_rule(rvu, rule->owner,
+							    rule);
+	}
+	mutex_unlock(&mcam->lock);
+
+	return 0;
+}
+
 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)
@@ -2964,9 +3004,9 @@ int rvu_mbox_handler_npc_mcam_shift_entry(struct rvu *rvu,
 	return rc;
 }
 
-int rvu_mbox_handler_npc_mcam_alloc_counter(struct rvu *rvu,
-			struct npc_mcam_alloc_counter_req *req,
-			struct npc_mcam_alloc_counter_rsp *rsp)
+static int __npc_mcam_alloc_counter(struct rvu *rvu,
+				    struct npc_mcam_alloc_counter_req *req,
+				    struct npc_mcam_alloc_counter_rsp *rsp)
 {
 	struct npc_mcam *mcam = &rvu->hw->mcam;
 	u16 pcifunc = req->hdr.pcifunc;
@@ -2987,11 +3027,9 @@ int rvu_mbox_handler_npc_mcam_alloc_counter(struct rvu *rvu,
 	if (!req->contig && req->count > NPC_MAX_NONCONTIG_COUNTERS)
 		return NPC_MCAM_INVALID_REQ;
 
-	mutex_lock(&mcam->lock);
 
 	/* Check if unused counters are available or not */
 	if (!rvu_rsrc_free_count(&mcam->counters)) {
-		mutex_unlock(&mcam->lock);
 		return NPC_MCAM_ALLOC_FAILED;
 	}
 
@@ -3024,12 +3062,27 @@ int rvu_mbox_handler_npc_mcam_alloc_counter(struct rvu *rvu,
 		}
 	}
 
-	mutex_unlock(&mcam->lock);
 	return 0;
 }
 
-int rvu_mbox_handler_npc_mcam_free_counter(struct rvu *rvu,
-		struct npc_mcam_oper_counter_req *req, struct msg_rsp *rsp)
+int rvu_mbox_handler_npc_mcam_alloc_counter(struct rvu *rvu,
+			struct npc_mcam_alloc_counter_req *req,
+			struct npc_mcam_alloc_counter_rsp *rsp)
+{
+	struct npc_mcam *mcam = &rvu->hw->mcam;
+	int err;
+
+	mutex_lock(&mcam->lock);
+
+	err = __npc_mcam_alloc_counter(rvu, req, rsp);
+
+	mutex_unlock(&mcam->lock);
+	return err;
+}
+
+static int __npc_mcam_free_counter(struct rvu *rvu,
+				   struct npc_mcam_oper_counter_req *req,
+				   struct msg_rsp *rsp)
 {
 	struct npc_mcam *mcam = &rvu->hw->mcam;
 	u16 index, entry = 0;
@@ -3039,10 +3092,8 @@ int rvu_mbox_handler_npc_mcam_free_counter(struct rvu *rvu,
 	if (blkaddr < 0)
 		return NPC_MCAM_INVALID_REQ;
 
-	mutex_lock(&mcam->lock);
 	err = npc_mcam_verify_counter(mcam, req->hdr.pcifunc, req->cntr);
 	if (err) {
-		mutex_unlock(&mcam->lock);
 		return err;
 	}
 
@@ -3066,10 +3117,66 @@ int rvu_mbox_handler_npc_mcam_free_counter(struct rvu *rvu,
 					      index, req->cntr);
 	}
 
-	mutex_unlock(&mcam->lock);
 	return 0;
 }
 
+int rvu_mbox_handler_npc_mcam_free_counter(struct rvu *rvu,
+		struct npc_mcam_oper_counter_req *req, struct msg_rsp *rsp)
+{
+	struct npc_mcam *mcam = &rvu->hw->mcam;
+	int err;
+
+	mutex_lock(&mcam->lock);
+
+	err = __npc_mcam_free_counter(rvu, req, rsp);
+
+	mutex_unlock(&mcam->lock);
+
+	return err;
+}
+
+void __rvu_mcam_remove_counter_from_rule(struct rvu *rvu, u16 pcifunc,
+					 struct rvu_npc_mcam_rule *rule)
+{
+	struct npc_mcam_oper_counter_req free_req = { 0 };
+	struct msg_rsp free_rsp;
+
+	if (!rule->has_cntr)
+		return;
+
+	free_req.hdr.pcifunc = pcifunc;
+	free_req.cntr = rule->cntr;
+
+	__npc_mcam_free_counter(rvu, &free_req, &free_rsp);
+	rule->has_cntr = false;
+}
+
+void __rvu_mcam_add_counter_to_rule(struct rvu *rvu, u16 pcifunc,
+				    struct rvu_npc_mcam_rule *rule,
+				    struct npc_install_flow_rsp *rsp)
+{
+	struct npc_mcam_alloc_counter_req cntr_req = { 0 };
+	struct npc_mcam_alloc_counter_rsp cntr_rsp = { 0 };
+	int err;
+
+	cntr_req.hdr.pcifunc = pcifunc;
+	cntr_req.contig = true;
+	cntr_req.count = 1;
+
+	/* we try to allocate a counter to track the stats of this
+	 * rule. If counter could not be allocated then proceed
+	 * without counter because counters are limited than entries.
+	 */
+	err = __npc_mcam_alloc_counter(rvu, &cntr_req, &cntr_rsp);
+	if (!err && cntr_rsp.count) {
+		rule->cntr = cntr_rsp.cntr;
+		rule->has_cntr = true;
+		rsp->counter = rule->cntr;
+	} else {
+		rsp->counter = err;
+	}
+}
+
 int rvu_mbox_handler_npc_mcam_unmap_counter(struct rvu *rvu,
 		struct npc_mcam_unmap_counter_req *req, struct msg_rsp *rsp)
 {
@@ -3467,3 +3574,33 @@ int rvu_mbox_handler_npc_mcam_entry_stats(struct rvu *rvu,
 
 	return 0;
 }
+
+void rvu_npc_clear_ucast_entry(struct rvu *rvu, int pcifunc, int nixlf)
+{
+	struct npc_mcam *mcam = &rvu->hw->mcam;
+	struct rvu_npc_mcam_rule *rule;
+	int ucast_idx, blkaddr;
+
+	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0);
+	if (blkaddr < 0)
+		return;
+
+	ucast_idx = npc_get_nixlf_mcam_index(mcam, pcifunc,
+					     nixlf, NIXLF_UCAST_ENTRY);
+
+	npc_enable_mcam_entry(rvu, mcam, blkaddr, ucast_idx, false);
+
+	npc_set_mcam_action(rvu, mcam, blkaddr, ucast_idx, 0);
+
+	npc_clear_mcam_entry(rvu, mcam, blkaddr, ucast_idx);
+
+	mutex_lock(&mcam->lock);
+	list_for_each_entry(rule, &mcam->mcam_rules, list) {
+		if (rule->entry == ucast_idx) {
+			list_del(&rule->list);
+			kfree(rule);
+			break;
+		}
+	}
+	mutex_unlock(&mcam->lock);
+}