octeontx2-af: cn10k: Introduce driver for macsec block.

CN10K-B and CNF10K-B has macsec block(MCS) to encrypt and
decrypt packets at MAC level. This block is a global resource
with hardware resources like SecYs, SCs and SAs and is in
between NIX block and RPM LMAC. CN10K-B silicon has only one MCS
block which receives packets from all LMACS whereas CNF10K-B has
seven MCS blocks for seven LMACs. Both MCS blocks are
similar in operation except for few register offsets and some
configurations require writing to different registers. Those
differences between IPs are handled using separate ops.
This patch adds basic driver and does the initial hardware
calibration and parser configuration.

Signed-off-by: Geetha sowjanya <gakula@marvell.com>
Signed-off-by: Vamsi Attunuru <vattunuru@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 92 insertions, 0 deletions

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/mcs.h b/drivers/net/ethernet/marvell/octeontx2/af/mcs.h
new file mode 100644
index 000000000000..002fee898e7b
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeontx2/af/mcs.h
@@ -0,0 +1,92 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Marvell CN10K MCS driver
+ *
+ * Copyright (C) 2022 Marvell.
+ */
+
+#ifndef MCS_H
+#define MCS_H
+
+#include <linux/bits.h>
+#include "rvu.h"
+
+#define PCI_DEVID_CN10K_MCS		0xA096
+
+#define MCSX_LINK_LMAC_RANGE_MASK	GENMASK_ULL(19, 16)
+#define MCSX_LINK_LMAC_BASE_MASK	GENMASK_ULL(11, 0)
+
+#define MCS_ID_MASK			0x7
+
+/* Reserved resources for default bypass entry */
+#define MCS_RSRC_RSVD_CNT		1
+
+struct mcs_rsrc_map {
+	u16 *flowid2pf_map;
+	u16 *secy2pf_map;
+	u16 *sc2pf_map;
+	u16 *sa2pf_map;
+	u16 *flowid2secy_map;	/* bitmap flowid mapped to secy*/
+	struct rsrc_bmap	flow_ids;
+	struct rsrc_bmap	secy;
+	struct rsrc_bmap	sc;
+	struct rsrc_bmap	sa;
+};
+
+struct hwinfo {
+	u8 tcam_entries;
+	u8 secy_entries;
+	u8 sc_entries;
+	u16 sa_entries;
+	u8 mcs_x2p_intf;
+	u8 lmac_cnt;
+	u8 mcs_blks;
+	unsigned long	lmac_bmap; /* bitmap of enabled mcs lmac */
+};
+
+struct mcs {
+	void __iomem		*reg_base;
+	struct pci_dev		*pdev;
+	struct device		*dev;
+	struct hwinfo		*hw;
+	struct mcs_rsrc_map	tx;
+	struct mcs_rsrc_map	rx;
+	u8			mcs_id;
+	struct mcs_ops		*mcs_ops;
+	struct list_head	mcs_list;
+};
+
+struct mcs_ops {
+	void	(*mcs_set_hw_capabilities)(struct mcs *mcs);
+	void	(*mcs_parser_cfg)(struct mcs *mcs);
+};
+
+extern struct pci_driver mcs_driver;
+
+static inline void mcs_reg_write(struct mcs *mcs, u64 offset, u64 val)
+{
+	writeq(val, mcs->reg_base + offset);
+}
+
+static inline u64 mcs_reg_read(struct mcs *mcs, u64 offset)
+{
+	return readq(mcs->reg_base + offset);
+}
+
+/* MCS APIs */
+struct mcs *mcs_get_pdata(int mcs_id);
+int mcs_get_blkcnt(void);
+int mcs_set_lmac_channels(int mcs_id, u16 base);
+
+int mcs_install_flowid_bypass_entry(struct mcs *mcs);
+void mcs_set_lmac_mode(struct mcs *mcs, int lmac_id, u8 mode);
+
+/* CN10K-B APIs */
+void cn10kb_mcs_set_hw_capabilities(struct mcs *mcs);
+void cn10kb_mcs_parser_cfg(struct mcs *mcs);
+
+/* CNF10K-B APIs */
+struct mcs_ops *cnf10kb_get_mac_ops(void);
+void cnf10kb_mcs_set_hw_capabilities(struct mcs *mcs);
+void cnf10kb_mcs_parser_cfg(struct mcs *mcs);
+
+#endif /* MCS_H */