octeontx2-af: Fix PKIND overlap between LBK and LMAC interfaces

Currently PKINDs are not assigned to LBK channels.
The default value of LBK_CHX_PKIND (channel to PKIND mapping) register
is zero, which is resulting in a overlap of pkind between LBK and CGX
LMACs. When KPU1 parser config is modified when PTP timestamping is
enabled on the CGX LMAC interface it is impacting traffic on LBK
interfaces as well.

This patch fixes the issue by reserving the PKIND#0 for LBK devices.
CGX mapped PF pkind starts from 1 and also fixes the max pkind available.

Fixes: 42157217 ("octeontx2-af: Support to enable/disable HW timestamping")
Signed-off-by: Geetha sowjanya <gakula@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/npc.h

@@ -151,7 +151,10 @@ enum npc_kpu_lh_ltype {
  * Software assigns pkind for each incoming port such as CGX
  * Ethernet interfaces, LBK interfaces, etc.
  */
+#define NPC_UNRESERVED_PKIND_COUNT NPC_RX_VLAN_EXDSA_PKIND
+
 enum npc_pkind_type {
+	NPC_RX_LBK_PKIND = 0ULL,
 	NPC_RX_VLAN_EXDSA_PKIND = 56ULL,
 	NPC_RX_CHLEN24B_PKIND = 57ULL,
 	NPC_RX_CPT_HDR_PKIND,

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

@@ -298,6 +298,7 @@ static int nix_interface_init(struct rvu *rvu, u16 pcifunc, int type, int nixlf)
 					rvu_nix_chan_lbk(rvu, lbkid, vf + 1);
 		pfvf->rx_chan_cnt = 1;
 		pfvf->tx_chan_cnt = 1;
+		rvu_npc_set_pkind(rvu, NPC_RX_LBK_PKIND, pfvf);
 		rvu_npc_install_promisc_entry(rvu, pcifunc, nixlf,
 					      pfvf->rx_chan_base,
 					      pfvf->rx_chan_cnt);

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

@@ -1721,7 +1721,6 @@ static void npc_parser_profile_init(struct rvu *rvu, int blkaddr)
 {
 	struct rvu_hwinfo *hw = rvu->hw;
 	int num_pkinds, num_kpus, idx;
-	struct npc_pkind *pkind;
 
 	/* Disable all KPUs and their entries */
 	for (idx = 0; idx < hw->npc_kpus; idx++) {
@@ -1739,9 +1738,8 @@ static void npc_parser_profile_init(struct rvu *rvu, int blkaddr)
 	 * Check HW max count to avoid configuring junk or
 	 * writing to unsupported CSR addresses.
 	 */
-	pkind = &hw->pkind;
 	num_pkinds = rvu->kpu.pkinds;
-	num_pkinds = min_t(int, pkind->rsrc.max, num_pkinds);
+	num_pkinds = min_t(int, hw->npc_pkinds, num_pkinds);
 
 	for (idx = 0; idx < num_pkinds; idx++)
 		npc_config_kpuaction(rvu, blkaddr, &rvu->kpu.ikpu[idx], 0, idx, true);
@@ -1891,7 +1889,8 @@ static void rvu_npc_hw_init(struct rvu *rvu, int blkaddr)
 	if (npc_const1 & BIT_ULL(63))
 		npc_const2 = rvu_read64(rvu, blkaddr, NPC_AF_CONST2);
 
-	pkind->rsrc.max = (npc_const1 >> 12) & 0xFFULL;
+	pkind->rsrc.max = NPC_UNRESERVED_PKIND_COUNT;
+	hw->npc_pkinds = (npc_const1 >> 12) & 0xFFULL;
 	hw->npc_kpu_entries = npc_const1 & 0xFFFULL;
 	hw->npc_kpus = (npc_const >> 8) & 0x1FULL;
 	hw->npc_intfs = npc_const & 0xFULL;
@@ -2002,6 +2001,10 @@ int rvu_npc_init(struct rvu *rvu)
 	err = rvu_alloc_bitmap(&pkind->rsrc);
 	if (err)
 		return err;
+	/* Reserve PKIND#0 for LBKs. Power reset value of LBK_CH_PKIND is '0',
+	 * no need to configure PKIND for all LBKs separately.
+	 */
+	rvu_alloc_rsrc(&pkind->rsrc);
 
 	/* Allocate mem for pkind to PF and channel mapping info */
 	pkind->pfchan_map = devm_kcalloc(rvu->dev, pkind->rsrc.max,