octeontx2-af: Add MKEX default profile

Added basic default MKEX profile. This profile tells
hardware what data to extract from packet and where to
place it (bit offset) in final KEY generated for the
parsed packet. Based on the bit placement of the packet
data, MCAM entries have to programmed for matching.

Also added a msg to retrieve this MKEX profile from PF/VF
which inturn can process it to determine how MCAM entry
has to be populated.

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

Author: Santosh Shukla

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

@@ -176,6 +176,8 @@ M(NPC_MCAM_COUNTER_STATS, 0x600a, npc_mcam_counter_stats,		\
 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)  \
+M(NPC_GET_KEX_CFG,	  0x600c, npc_get_kex_cfg,			\
+				   msg_req, npc_get_kex_cfg_rsp)	\
 /* NIX mbox IDs (range 0x8000 - 0xFFFF) */				\
 M(NIX_LF_ALLOC,		0x8000, nix_lf_alloc,				\
 				 nix_lf_alloc_req, nix_lf_alloc_rsp)	\
@@ -699,4 +701,21 @@ struct npc_mcam_alloc_and_write_entry_rsp {
 	u16 cntr;
 };
 
+struct npc_get_kex_cfg_rsp {
+	struct mbox_msghdr hdr;
+	u64 rx_keyx_cfg;   /* NPC_AF_INTF(0)_KEX_CFG */
+	u64 tx_keyx_cfg;   /* NPC_AF_INTF(1)_KEX_CFG */
+#define NPC_MAX_INTF	2
+#define NPC_MAX_LID	8
+#define NPC_MAX_LT	16
+#define NPC_MAX_LD	2
+#define NPC_MAX_LFL	16
+	/* NPC_AF_KEX_LDATA(0..1)_FLAGS_CFG */
+	u64 kex_ld_flags[NPC_MAX_LD];
+	/* NPC_AF_INTF(0..1)_LID(0..7)_LT(0..15)_LD(0..1)_CFG */
+	u64 intf_lid_lt_ld[NPC_MAX_INTF][NPC_MAX_LID][NPC_MAX_LT][NPC_MAX_LD];
+	/* NPC_AF_INTF(0..1)_LDATA(0..1)_FLAGS(0..15)_CFG */
+	u64 intf_ld_flags[NPC_MAX_INTF][NPC_MAX_LD][NPC_MAX_LFL];
+};
+
 #endif /* MBOX_H */

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

@@ -415,4 +415,6 @@ int rvu_mbox_handler_npc_mcam_counter_stats(struct rvu *rvu,
 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);
+int rvu_mbox_handler_npc_get_kex_cfg(struct rvu *rvu, struct msg_req *req,
+				     struct npc_get_kex_cfg_rsp *rsp);
 #endif /* RVU_H */

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

@@ -427,9 +427,28 @@ void rvu_npc_install_bcast_match_entry(struct rvu *rvu, u16 pcifunc,
 	index = npc_get_nixlf_mcam_index(mcam, pcifunc,
 					 nixlf, NIXLF_BCAST_ENTRY);
 
-	/* Check for L2B bit and LMAC channel */
-	entry.kw[0] = BIT_ULL(25) | chan;
-	entry.kw_mask[0] = BIT_ULL(25) | 0xFFFULL;
+	/* Check for L2B bit and LMAC channel
+	 * NOTE: Since MKEX default profile(a reduced version intended to
+	 * accommodate more capability but igoring few bits) a stap-gap
+	 * approach.
+	 * Since we care for L2B which by HRM NPC_PARSE_KEX_S at BIT_POS[25], So
+	 * moved to BIT_POS[13], ignoring ERRCODE, ERRLEV as we'll loose out
+	 * on capability features needed for CoS (/from ODP PoV) e.g: VLAN,
+	 * DSCP.
+	 *
+	 * Reduced layout of MKEX default profile -
+	 * Includes following are (i.e.CHAN, L2/3{B/M}, LA, LB, LC, LD):
+	 *
+	 * BIT_POS[31:28] : LD
+	 * BIT_POS[27:24] : LC
+	 * BIT_POS[23:20] : LB
+	 * BIT_POS[19:16] : LA
+	 * BIT_POS[15:12] : L3B, L3M, L2B, L2M
+	 * BIT_POS[11:00] : CHAN
+	 *
+	 */
+	entry.kw[0] = BIT_ULL(13) | chan;
+	entry.kw_mask[0] = ~entry.kw[0] & (BIT_ULL(13) | 0xFFFULL);
 
 	*(u64 *)&action = 0x00;
 #ifdef MCAST_MCE
@@ -538,14 +557,18 @@ void rvu_npc_disable_mcam_entries(struct rvu *rvu, u16 pcifunc, int nixlf)
 	}
 }
 
-#define LDATA_EXTRACT_CONFIG(intf, lid, ltype, ld, cfg) \
+#define SET_KEX_LD(intf, lid, ltype, ld, cfg)	\
 	rvu_write64(rvu, blkaddr,			\
 		NPC_AF_INTFX_LIDX_LTX_LDX_CFG(intf, lid, ltype, ld), cfg)
 
-#define LDATA_FLAGS_CONFIG(intf, ld, flags, cfg)	\
+#define SET_KEX_LDFLAGS(intf, ld, flags, cfg)	\
 	rvu_write64(rvu, blkaddr,			\
 		NPC_AF_INTFX_LDATAX_FLAGSX_CFG(intf, ld, flags), cfg)
 
+#define KEX_LD_CFG(bytesm1, hdr_ofs, ena, flags_ena, key_ofs)		\
+			(((bytesm1) << 16) | ((hdr_ofs) << 8) | ((ena) << 7) | \
+			 ((flags_ena) << 6) | ((key_ofs) & 0x3F))
+
 static void npc_config_ldata_extract(struct rvu *rvu, int blkaddr)
 {
 	struct npc_mcam *mcam = &rvu->hw->mcam;
@@ -561,28 +584,66 @@ static void npc_config_ldata_extract(struct rvu *rvu, int blkaddr)
 	 */
 	for (lid = 0; lid < lid_count; lid++) {
 		for (ltype = 0; ltype < 16; ltype++) {
-			LDATA_EXTRACT_CONFIG(NIX_INTF_RX, lid, ltype, 0, 0ULL);
-			LDATA_EXTRACT_CONFIG(NIX_INTF_RX, lid, ltype, 1, 0ULL);
-			LDATA_EXTRACT_CONFIG(NIX_INTF_TX, lid, ltype, 0, 0ULL);
-			LDATA_EXTRACT_CONFIG(NIX_INTF_TX, lid, ltype, 1, 0ULL);
-
-			LDATA_FLAGS_CONFIG(NIX_INTF_RX, 0, ltype, 0ULL);
-			LDATA_FLAGS_CONFIG(NIX_INTF_RX, 1, ltype, 0ULL);
-			LDATA_FLAGS_CONFIG(NIX_INTF_TX, 0, ltype, 0ULL);
-			LDATA_FLAGS_CONFIG(NIX_INTF_TX, 1, ltype, 0ULL);
+			SET_KEX_LD(NIX_INTF_RX, lid, ltype, 0, 0ULL);
+			SET_KEX_LD(NIX_INTF_RX, lid, ltype, 1, 0ULL);
+			SET_KEX_LD(NIX_INTF_TX, lid, ltype, 0, 0ULL);
+			SET_KEX_LD(NIX_INTF_TX, lid, ltype, 1, 0ULL);
+
+			SET_KEX_LDFLAGS(NIX_INTF_RX, 0, ltype, 0ULL);
+			SET_KEX_LDFLAGS(NIX_INTF_RX, 1, ltype, 0ULL);
+			SET_KEX_LDFLAGS(NIX_INTF_TX, 0, ltype, 0ULL);
+			SET_KEX_LDFLAGS(NIX_INTF_TX, 1, ltype, 0ULL);
 		}
 	}
 
-	/* If we plan to extract Outer IPv4 tuple for TCP/UDP pkts
-	 * then 112bit key is not sufficient
-	 */
 	if (mcam->keysize != NPC_MCAM_KEY_X2)
 		return;
 
-	/* Start placing extracted data/flags from 64bit onwards, for now */
-	/* Extract DMAC from the packet */
-	cfg = (0x05 << 16) | BIT_ULL(7) | NPC_PARSE_RESULT_DMAC_OFFSET;
-	LDATA_EXTRACT_CONFIG(NIX_INTF_RX, NPC_LID_LA, NPC_LT_LA_ETHER, 0, cfg);
+	/* Default MCAM KEX profile */
+	/* Layer A: Ethernet: */
+
+	/* DMAC: 6 bytes, KW1[47:0] */
+	cfg = KEX_LD_CFG(0x05, 0x0, 0x1, 0x0, NPC_PARSE_RESULT_DMAC_OFFSET);
+	SET_KEX_LD(NIX_INTF_RX, NPC_LID_LA, NPC_LT_LA_ETHER, 0, cfg);
+
+	/* Ethertype: 2 bytes, KW0[47:32] */
+	cfg = KEX_LD_CFG(0x01, 0xc, 0x1, 0x0, 0x4);
+	SET_KEX_LD(NIX_INTF_RX, NPC_LID_LA, NPC_LT_LA_ETHER, 1, cfg);
+
+	/* Layer B: Single VLAN (CTAG) */
+	/* CTAG VLAN[2..3] + Ethertype, 4 bytes, KW0[63:32] */
+	cfg = KEX_LD_CFG(0x03, 0x0, 0x1, 0x0, 0x4);
+	SET_KEX_LD(NIX_INTF_RX, NPC_LID_LB, NPC_LT_LB_CTAG, 0, cfg);
+
+	/* Layer B: Stacked VLAN (STAG|QinQ) */
+	/* CTAG VLAN[2..3] + Ethertype, 4 bytes, KW0[63:32] */
+	cfg = KEX_LD_CFG(0x03, 0x4, 0x1, 0x0, 0x4);
+	SET_KEX_LD(NIX_INTF_RX, NPC_LID_LB, NPC_LT_LB_STAG, 0, cfg);
+	SET_KEX_LD(NIX_INTF_RX, NPC_LID_LB, NPC_LT_LB_QINQ, 0, cfg);
+
+	/* Layer C: IPv4 */
+	/* SIP+DIP: 8 bytes, KW2[63:0] */
+	cfg = KEX_LD_CFG(0x07, 0xc, 0x1, 0x0, 0x10);
+	SET_KEX_LD(NIX_INTF_RX, NPC_LID_LC, NPC_LT_LC_IP, 0, cfg);
+	/* TOS: 1 byte, KW1[63:56] */
+	cfg = KEX_LD_CFG(0x0, 0x1, 0x1, 0x0, 0xf);
+	SET_KEX_LD(NIX_INTF_RX, NPC_LID_LC, NPC_LT_LC_IP, 1, cfg);
+
+	/* Layer D:UDP */
+	/* SPORT: 2 bytes, KW3[15:0] */
+	cfg = KEX_LD_CFG(0x1, 0x0, 0x1, 0x0, 0x18);
+	SET_KEX_LD(NIX_INTF_RX, NPC_LID_LD, NPC_LT_LD_UDP, 0, cfg);
+	/* DPORT: 2 bytes, KW3[31:16] */
+	cfg = KEX_LD_CFG(0x1, 0x2, 0x1, 0x0, 0x1a);
+	SET_KEX_LD(NIX_INTF_RX, NPC_LID_LD, NPC_LT_LD_UDP, 1, cfg);
+
+	/* Layer D:TCP */
+	/* SPORT: 2 bytes, KW3[15:0] */
+	cfg = KEX_LD_CFG(0x1, 0x0, 0x1, 0x0, 0x18);
+	SET_KEX_LD(NIX_INTF_RX, NPC_LID_LD, NPC_LT_LD_TCP, 0, cfg);
+	/* DPORT: 2 bytes, KW3[31:16] */
+	cfg = KEX_LD_CFG(0x1, 0x2, 0x1, 0x0, 0x1a);
+	SET_KEX_LD(NIX_INTF_RX, NPC_LID_LD, NPC_LT_LD_TCP, 1, cfg);
 }
 
 static void npc_config_kpuaction(struct rvu *rvu, int blkaddr,
@@ -898,13 +959,12 @@ int rvu_npc_init(struct rvu *rvu)
 		    BIT_ULL(6) | BIT_ULL(2));
 
 	/* Set RX and TX side MCAM search key size.
-	 * Also enable parse key extract nibbles suchthat except
-	 * layer E to H, rest of the key is included for MCAM search.
+	 * LA..LD (ltype only) + Channel
 	 */
 	rvu_write64(rvu, blkaddr, NPC_AF_INTFX_KEX_CFG(NIX_INTF_RX),
-		    ((keyz & 0x3) << 32) | ((1ULL << 20) - 1));
+			((keyz & 0x3) << 32) | 0x49247);
 	rvu_write64(rvu, blkaddr, NPC_AF_INTFX_KEX_CFG(NIX_INTF_TX),
-		    ((keyz & 0x3) << 32) | ((1ULL << 20) - 1));
+			((keyz & 0x3) << 32) | ((1ULL << 19) - 1));
 
 	err = npc_mcam_rsrcs_init(rvu, blkaddr);
 	if (err)
@@ -1876,3 +1936,48 @@ int rvu_mbox_handler_npc_mcam_alloc_and_write_entry(struct rvu *rvu,
 
 	return 0;
 }
+
+#define GET_KEX_CFG(intf) \
+	rvu_read64(rvu, BLKADDR_NPC, NPC_AF_INTFX_KEX_CFG(intf))
+
+#define GET_KEX_FLAGS(ld) \
+	rvu_read64(rvu, BLKADDR_NPC, NPC_AF_KEX_LDATAX_FLAGS_CFG(ld))
+
+#define GET_KEX_LD(intf, lid, lt, ld)	\
+	rvu_read64(rvu, BLKADDR_NPC,	\
+		NPC_AF_INTFX_LIDX_LTX_LDX_CFG(intf, lid, lt, ld))
+
+#define GET_KEX_LDFLAGS(intf, ld, fl)	\
+	rvu_read64(rvu, BLKADDR_NPC,	\
+		NPC_AF_INTFX_LDATAX_FLAGSX_CFG(intf, ld, fl))
+
+int rvu_mbox_handler_npc_get_kex_cfg(struct rvu *rvu, struct msg_req *req,
+				     struct npc_get_kex_cfg_rsp *rsp)
+{
+	int lid, lt, ld, fl;
+
+	rsp->rx_keyx_cfg = GET_KEX_CFG(NIX_INTF_RX);
+	rsp->tx_keyx_cfg = GET_KEX_CFG(NIX_INTF_TX);
+	for (lid = 0; lid < NPC_MAX_LID; lid++) {
+		for (lt = 0; lt < NPC_MAX_LT; lt++) {
+			for (ld = 0; ld < NPC_MAX_LD; ld++) {
+				rsp->intf_lid_lt_ld[NIX_INTF_RX][lid][lt][ld] =
+					GET_KEX_LD(NIX_INTF_RX, lid, lt, ld);
+				rsp->intf_lid_lt_ld[NIX_INTF_TX][lid][lt][ld] =
+					GET_KEX_LD(NIX_INTF_TX, lid, lt, ld);
+			}
+		}
+	}
+	for (ld = 0; ld < NPC_MAX_LD; ld++)
+		rsp->kex_ld_flags[ld] = GET_KEX_FLAGS(ld);
+
+	for (ld = 0; ld < NPC_MAX_LD; ld++) {
+		for (fl = 0; fl < NPC_MAX_LFL; fl++) {
+			rsp->intf_ld_flags[NIX_INTF_RX][ld][fl] =
+					GET_KEX_LDFLAGS(NIX_INTF_RX, ld, fl);
+			rsp->intf_ld_flags[NIX_INTF_TX][ld][fl] =
+					GET_KEX_LDFLAGS(NIX_INTF_TX, ld, fl);
+		}
+	}
+	return 0;
+}