octeontx2-af: Prepare for allocating MCAM rules for AF

AF till now only manages the allocation and freeing of
MCAM rules for other PF/VFs in system. To implement
L2 switching between all CGX mapped PF and VFs, AF
requires MCAM entries for DMAC rules for each PF and VF.
This patch modifies AF driver such that AF can also
allocate MCAM rules and install rules for other
PFs and VFs. All the checks like channel verification
for RX rules and PF_FUNC verification for TX rules are
relaxed in case AF is allocating or installing rules.
Also all the entry and counter to owner mappings are
set to NPC_MCAM_INVALID_MAP when they are free indicating
those are not allocated to AF nor PF/VFs.
This patch also ensures that AF allocated and installed
entries are displayed in debugfs.
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -2113,9 +2113,6 @@ static void rvu_print_npc_mcam_info(struct seq_file *s,
 	int entry_acnt, entry_ecnt;
 	int cntr_acnt, cntr_ecnt;
 
-	/* Skip PF0 */
-	if (!pcifunc)
-		return;
 	rvu_npc_get_mcam_entry_alloc_info(rvu, pcifunc, blkaddr,
 					  &entry_acnt, &entry_ecnt);
 	rvu_npc_get_mcam_counter_alloc_info(rvu, pcifunc, blkaddr,
@@ -2298,7 +2295,7 @@ static void rvu_dbg_npc_mcam_show_flows(struct seq_file *s,
 static void rvu_dbg_npc_mcam_show_action(struct seq_file *s,
 					 struct rvu_npc_mcam_rule *rule)
 {
-	if (rule->intf == NIX_INTF_TX) {
+	if (is_npc_intf_tx(rule->intf)) {
 		switch (rule->tx_action.op) {
 		case NIX_TX_ACTIONOP_DROP:
 			seq_puts(s, "\taction: Drop\n");

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

@@ -442,7 +442,8 @@ static void npc_fixup_vf_rule(struct rvu *rvu, struct npc_mcam *mcam,
 	owner = mcam->entry2pfvf_map[index];
 	target_func = (entry->action >> 4) & 0xffff;
 	/* do nothing when target is LBK/PF or owner is not PF */
-	if (is_afvf(target_func) || (owner & RVU_PFVF_FUNC_MASK) ||
+	if (is_pffunc_af(owner) || is_afvf(target_func) ||
+	    (owner & RVU_PFVF_FUNC_MASK) ||
 	    !(target_func & RVU_PFVF_FUNC_MASK))
 		return;
 
@@ -661,6 +662,7 @@ void rvu_npc_install_ucast_entry(struct rvu *rvu, u16 pcifunc,
 	eth_broadcast_addr((u8 *)&req.mask.dmac);
 	req.features = BIT_ULL(NPC_DMAC);
 	req.channel = chan;
+	req.chan_mask = 0xFFFU;
 	req.intf = pfvf->nix_rx_intf;
 	req.op = action.op;
 	req.hdr.pcifunc = 0; /* AF is requester */
@@ -810,6 +812,7 @@ void rvu_npc_install_bcast_match_entry(struct rvu *rvu, u16 pcifunc,
 	eth_broadcast_addr((u8 *)&req.mask.dmac);
 	req.features = BIT_ULL(NPC_DMAC);
 	req.channel = chan;
+	req.chan_mask = 0xFFFU;
 	req.intf = pfvf->nix_rx_intf;
 	req.entry = index;
 	req.hdr.pcifunc = 0; /* AF is requester */
@@ -1756,6 +1759,8 @@ static int npc_mcam_rsrcs_init(struct rvu *rvu, int blkaddr)
 	int nixlf_count = rvu_get_nixlf_count(rvu);
 	struct npc_mcam *mcam = &rvu->hw->mcam;
 	int rsvd, err;
+	u16 index;
+	int cntr;
 	u64 cfg;
 
 	/* Actual number of MCAM entries vary by entry size */
@@ -1856,6 +1861,14 @@ static int npc_mcam_rsrcs_init(struct rvu *rvu, int blkaddr)
 	if (!mcam->entry2target_pffunc)
 		goto free_mem;
 
+	for (index = 0; index < mcam->bmap_entries; index++) {
+		mcam->entry2pfvf_map[index] = NPC_MCAM_INVALID_MAP;
+		mcam->entry2cntr_map[index] = NPC_MCAM_INVALID_MAP;
+	}
+
+	for (cntr = 0; cntr < mcam->counters.max; cntr++)
+		mcam->cntr2pfvf_map[cntr] = NPC_MCAM_INVALID_MAP;
+
 	mutex_init(&mcam->lock);
 
 	return 0;
@@ -2573,7 +2586,7 @@ int rvu_mbox_handler_npc_mcam_alloc_entry(struct rvu *rvu,
 	}
 
 	/* Alloc request from PFFUNC with no NIXLF attached should be denied */
-	if (!is_nixlf_attached(rvu, pcifunc))
+	if (!is_pffunc_af(pcifunc) && !is_nixlf_attached(rvu, pcifunc))
 		return NPC_MCAM_ALLOC_DENIED;
 
 	return npc_mcam_alloc_entries(mcam, pcifunc, req, rsp);
@@ -2593,7 +2606,7 @@ int rvu_mbox_handler_npc_mcam_free_entry(struct rvu *rvu,
 		return NPC_MCAM_INVALID_REQ;
 
 	/* Free request from PFFUNC with no NIXLF attached, ignore */
-	if (!is_nixlf_attached(rvu, pcifunc))
+	if (!is_pffunc_af(pcifunc) && !is_nixlf_attached(rvu, pcifunc))
 		return NPC_MCAM_INVALID_REQ;
 
 	mutex_lock(&mcam->lock);
@@ -2605,7 +2618,7 @@ int rvu_mbox_handler_npc_mcam_free_entry(struct rvu *rvu,
 	if (rc)
 		goto exit;
 
-	mcam->entry2pfvf_map[req->entry] = 0;
+	mcam->entry2pfvf_map[req->entry] = NPC_MCAM_INVALID_MAP;
 	mcam->entry2target_pffunc[req->entry] = 0x0;
 	npc_mcam_clear_bit(mcam, req->entry);
 	npc_enable_mcam_entry(rvu, mcam, blkaddr, req->entry, false);
@@ -2690,13 +2703,14 @@ int rvu_mbox_handler_npc_mcam_write_entry(struct rvu *rvu,
 	else
 		nix_intf = pfvf->nix_rx_intf;
 
-	if (npc_mcam_verify_channel(rvu, pcifunc, req->intf, channel)) {
+	if (!is_pffunc_af(pcifunc) &&
+	    npc_mcam_verify_channel(rvu, pcifunc, req->intf, channel)) {
 		rc = NPC_MCAM_INVALID_REQ;
 		goto exit;
 	}
 
-	if (npc_mcam_verify_pf_func(rvu, &req->entry_data, req->intf,
-				    pcifunc)) {
+	if (!is_pffunc_af(pcifunc) &&
+	    npc_mcam_verify_pf_func(rvu, &req->entry_data, req->intf, pcifunc)) {
 		rc = NPC_MCAM_INVALID_REQ;
 		goto exit;
 	}
@@ -2847,7 +2861,7 @@ int rvu_mbox_handler_npc_mcam_alloc_counter(struct rvu *rvu,
 		return NPC_MCAM_INVALID_REQ;
 
 	/* If the request is from a PFFUNC with no NIXLF attached, ignore */
-	if (!is_nixlf_attached(rvu, pcifunc))
+	if (!is_pffunc_af(pcifunc) && !is_nixlf_attached(rvu, pcifunc))
 		return NPC_MCAM_INVALID_REQ;
 
 	/* Since list of allocated counter IDs needs to be sent to requester,
@@ -3092,7 +3106,7 @@ int rvu_mbox_handler_npc_mcam_alloc_and_write_entry(struct rvu *rvu,
 	if (rc) {
 		/* Free allocated MCAM entry */
 		mutex_lock(&mcam->lock);
-		mcam->entry2pfvf_map[entry] = 0;
+		mcam->entry2pfvf_map[entry] = NPC_MCAM_INVALID_MAP;
 		npc_mcam_clear_bit(mcam, entry);
 		mutex_unlock(&mcam->lock);
 		return rc;

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

@@ -913,11 +913,9 @@ static void npc_update_rx_entry(struct rvu *rvu, struct rvu_pfvf *pfvf,
 				struct npc_install_flow_req *req, u16 target)
 {
 	struct nix_rx_action action;
-	u64 chan_mask;
 
-	chan_mask = req->chan_mask ? req->chan_mask : ~0ULL;
-	npc_update_entry(rvu, NPC_CHAN, entry, req->channel, 0, chan_mask, 0,
-			 NIX_INTF_RX);
+	npc_update_entry(rvu, NPC_CHAN, entry, req->channel, 0, req->chan_mask,
+			 0, NIX_INTF_RX);
 
 	*(u64 *)&action = 0x00;
 	action.pf_func = target;
@@ -1171,7 +1169,9 @@ int rvu_mbox_handler_npc_install_flow(struct rvu *rvu,
 	if (err)
 		return err;
 
-	if (npc_mcam_verify_channel(rvu, target, req->intf, req->channel))
+	/* Skip channel validation if AF is installing */
+	if (!is_pffunc_af(req->hdr.pcifunc) &&
+	    npc_mcam_verify_channel(rvu, target, req->intf, req->channel))
 		return -EINVAL;
 
 	pfvf = rvu_get_pfvf(rvu, target);
@@ -1187,6 +1187,7 @@ int rvu_mbox_handler_npc_install_flow(struct rvu *rvu,
 		eth_broadcast_addr((u8 *)&req->mask.dmac);
 	}
 
+	/* Proceed if NIXLF is attached or not for TX rules */
 	err = nix_get_nixlf(rvu, target, &nixlf, NULL);
 	if (err && is_npc_intf_rx(req->intf) && !pf_set_vfs_mac)
 		return -EINVAL;