octeontx2-af: Alloc and config NPC MCAM entry at a time

A new mailbox message is added to support allocating a MCAM entry
along with a counter and configuring it in one go. This reduces
the amount of mailbox communication involved in installing a new
MCAM rule.

Signed-off-by: Sunil Goutham <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: sgoutham-marvell

drivers/net/ethernet/marvell/octeontx2/af/mbox.h

@@ -173,6 +173,9 @@ M(NPC_MCAM_CLEAR_COUNTER, 0x6009, npc_mcam_clear_counter,		\
 M(NPC_MCAM_COUNTER_STATS, 0x600a, npc_mcam_counter_stats,		\
 				   npc_mcam_oper_counter_req,		\
 				   npc_mcam_oper_counter_rsp)		\
+M(NPC_MCAM_ALLOC_AND_WRITE_ENTRY, 0x600b, npc_mcam_alloc_and_write_entry,      \
+					  npc_mcam_alloc_and_write_entry_req,  \
+					  npc_mcam_alloc_and_write_entry_rsp)  \
 /* NIX mbox IDs (range 0x8000 - 0xFFFF) */				\
 M(NIX_LF_ALLOC,		0x8000, nix_lf_alloc,				\
 				 nix_lf_alloc_req, nix_lf_alloc_rsp)	\
@@ -680,4 +683,20 @@ struct npc_mcam_unmap_counter_req {
 	u8  all;   /* Unmap all entries using this counter ? */
 };
 
+struct npc_mcam_alloc_and_write_entry_req {
+	struct mbox_msghdr hdr;
+	struct mcam_entry entry_data;
+	u16 ref_entry;
+	u8  priority;    /* Lower or higher w.r.t ref_entry */
+	u8  intf;	 /* Rx or Tx interface */
+	u8  enable_entry;/* Enable this MCAM entry ? */
+	u8  alloc_cntr;  /* Allocate counter and map ? */
+};
+
+struct npc_mcam_alloc_and_write_entry_rsp {
+	struct mbox_msghdr hdr;
+	u16 entry;
+	u16 cntr;
+};
+
 #endif /* MBOX_H */

drivers/net/ethernet/marvell/octeontx2/af/rvu.h

@@ -412,4 +412,7 @@ int rvu_mbox_handler_npc_mcam_unmap_counter(struct rvu *rvu,
 int rvu_mbox_handler_npc_mcam_counter_stats(struct rvu *rvu,
 			struct npc_mcam_oper_counter_req *req,
 			struct npc_mcam_oper_counter_rsp *rsp);
+int rvu_mbox_handler_npc_mcam_alloc_and_write_entry(struct rvu *rvu,
+			  struct npc_mcam_alloc_and_write_entry_req *req,
+			  struct npc_mcam_alloc_and_write_entry_rsp *rsp);
 #endif /* RVU_H */

drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c

@@ -1804,3 +1804,75 @@ int rvu_mbox_handler_npc_mcam_counter_stats(struct rvu *rvu,
 
 	return 0;
 }
+
+int rvu_mbox_handler_npc_mcam_alloc_and_write_entry(struct rvu *rvu,
+			  struct npc_mcam_alloc_and_write_entry_req *req,
+			  struct npc_mcam_alloc_and_write_entry_rsp *rsp)
+{
+	struct npc_mcam_alloc_counter_req cntr_req;
+	struct npc_mcam_alloc_counter_rsp cntr_rsp;
+	struct npc_mcam_alloc_entry_req entry_req;
+	struct npc_mcam_alloc_entry_rsp entry_rsp;
+	struct npc_mcam *mcam = &rvu->hw->mcam;
+	u16 entry = NPC_MCAM_ENTRY_INVALID;
+	u16 cntr = NPC_MCAM_ENTRY_INVALID;
+	int blkaddr, rc;
+
+	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0);
+	if (blkaddr < 0)
+		return NPC_MCAM_INVALID_REQ;
+
+	if (req->intf != NIX_INTF_RX && req->intf != NIX_INTF_TX)
+		return NPC_MCAM_INVALID_REQ;
+
+	/* Try to allocate a MCAM entry */
+	entry_req.hdr.pcifunc = req->hdr.pcifunc;
+	entry_req.contig = true;
+	entry_req.priority = req->priority;
+	entry_req.ref_entry = req->ref_entry;
+	entry_req.count = 1;
+
+	rc = rvu_mbox_handler_npc_mcam_alloc_entry(rvu,
+						   &entry_req, &entry_rsp);
+	if (rc)
+		return rc;
+
+	if (!entry_rsp.count)
+		return NPC_MCAM_ALLOC_FAILED;
+
+	entry = entry_rsp.entry;
+
+	if (!req->alloc_cntr)
+		goto write_entry;
+
+	/* Now allocate counter */
+	cntr_req.hdr.pcifunc = req->hdr.pcifunc;
+	cntr_req.contig = true;
+	cntr_req.count = 1;
+
+	rc = rvu_mbox_handler_npc_mcam_alloc_counter(rvu, &cntr_req, &cntr_rsp);
+	if (rc) {
+		/* Free allocated MCAM entry */
+		mutex_lock(&mcam->lock);
+		mcam->entry2pfvf_map[entry] = 0;
+		npc_mcam_clear_bit(mcam, entry);
+		mutex_unlock(&mcam->lock);
+		return rc;
+	}
+
+	cntr = cntr_rsp.cntr;
+
+write_entry:
+	mutex_lock(&mcam->lock);
+	npc_config_mcam_entry(rvu, mcam, blkaddr, entry, req->intf,
+			      &req->entry_data, req->enable_entry);
+
+	if (req->alloc_cntr)
+		npc_map_mcam_entry_and_cntr(rvu, mcam, blkaddr, entry, cntr);
+	mutex_unlock(&mcam->lock);
+
+	rsp->entry = entry;
+	rsp->cntr = cntr;
+
+	return 0;
+}