octeontx2-af: mcs: Config parser to skip 8B header

When ptp timestamp is enabled in RPM, RPM will append 8B
timestamp header for all RX traffic. MCS need to skip these
8 bytes header while parsing the packet header, so that
correct tcam key is created for lookup.
This patch fixes the mcs parser configuration to skip this
8B header for ptp packets.

Fixes: ca7f49ff ("octeontx2-af: cn10k: Introduce driver for macsec block.")
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: Geetha sowjanya <gakula@marvell.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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

@@ -97,6 +97,7 @@
 #define MCSX_PEX_TX_SLAVE_VLAN_CFGX(a)          (0x46f8ull + (a) * 0x8ull)
 #define MCSX_PEX_TX_SLAVE_CUSTOM_TAG_REL_MODE_SEL(a)	(0x788ull + (a) * 0x8ull)
 #define MCSX_PEX_TX_SLAVE_PORT_CONFIG(a)		(0x4738ull + (a) * 0x8ull)
+#define MCSX_PEX_RX_SLAVE_PORT_CFGX(a)		(0x3b98ull + (a) * 0x8ull)
 #define MCSX_PEX_RX_SLAVE_RULE_ETYPE_CFGX(a) ({	\
 	u64 offset;					\
 							\

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

@@ -11,6 +11,7 @@
 
 #include "mcs.h"
 #include "rvu.h"
+#include "mcs_reg.h"
 #include "lmac_common.h"
 
 #define M(_name, _id, _fn_name, _req_type, _rsp_type)			\
@@ -32,6 +33,42 @@ static struct _req_type __maybe_unused					\
 MBOX_UP_MCS_MESSAGES
 #undef M
 
+void rvu_mcs_ptp_cfg(struct rvu *rvu, u8 rpm_id, u8 lmac_id, bool ena)
+{
+	struct mcs *mcs;
+	u64 cfg;
+	u8 port;
+
+	if (!rvu->mcs_blk_cnt)
+		return;
+
+	/* When ptp is enabled, RPM appends 8B header for all
+	 * RX packets. MCS PEX need to configure to skip 8B
+	 * during packet parsing.
+	 */
+
+	/* CNF10K-B */
+	if (rvu->mcs_blk_cnt > 1) {
+		mcs = mcs_get_pdata(rpm_id);
+		cfg = mcs_reg_read(mcs, MCSX_PEX_RX_SLAVE_PEX_CONFIGURATION);
+		if (ena)
+			cfg |= BIT_ULL(lmac_id);
+		else
+			cfg &= ~BIT_ULL(lmac_id);
+		mcs_reg_write(mcs, MCSX_PEX_RX_SLAVE_PEX_CONFIGURATION, cfg);
+		return;
+	}
+	/* CN10KB */
+	mcs = mcs_get_pdata(0);
+	port = (rpm_id * rvu->hw->lmac_per_cgx) + lmac_id;
+	cfg = mcs_reg_read(mcs, MCSX_PEX_RX_SLAVE_PORT_CFGX(port));
+	if (ena)
+		cfg |= BIT_ULL(0);
+	else
+		cfg &= ~BIT_ULL(0);
+	mcs_reg_write(mcs, MCSX_PEX_RX_SLAVE_PORT_CFGX(port), cfg);
+}
+
 int rvu_mbox_handler_mcs_set_lmac_mode(struct rvu *rvu,
 				       struct mcs_set_lmac_mode *req,
 				       struct msg_rsp *rsp)

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

@@ -920,6 +920,7 @@ int rvu_get_hwvf(struct rvu *rvu, int pcifunc);
 /* CN10K MCS */
 int rvu_mcs_init(struct rvu *rvu);
 int rvu_mcs_flr_handler(struct rvu *rvu, u16 pcifunc);
+void rvu_mcs_ptp_cfg(struct rvu *rvu, u8 rpm_id, u8 lmac_id, bool ena);
 void rvu_mcs_exit(struct rvu *rvu);
 
 #endif /* RVU_H */

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

@@ -773,6 +773,8 @@ static int rvu_cgx_ptp_rx_cfg(struct rvu *rvu, u16 pcifunc, bool enable)
 	/* This flag is required to clean up CGX conf if app gets killed */
 	pfvf->hw_rx_tstamp_en = enable;
 
+	/* Inform MCS about 8B RX header */
+	rvu_mcs_ptp_cfg(rvu, cgx_id, lmac_id, enable);
 	return 0;
 }