net: ti: icssg-prueth: Add Firmware config and classification APIs.

Add icssg_config.h / .c and icssg_classifier.c files. These are firmware
configuration and classification related files. These will be used by
ICSSG ethernet driver.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/ti/icssg/icssg_classifier.c

+// SPDX-License-Identifier: GPL-2.0
+/* Texas Instruments ICSSG Ethernet Driver
+ *
+ * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
+ *
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/types.h>
+#include <linux/regmap.h>
+
+#include "icssg_prueth.h"
+
+#define ICSSG_NUM_CLASSIFIERS	16
+#define ICSSG_NUM_FT1_SLOTS	8
+#define ICSSG_NUM_FT3_SLOTS	16
+
+#define ICSSG_NUM_CLASSIFIERS_IN_USE	5
+
+/* Filter 1 - FT1 */
+#define FT1_NUM_SLOTS	8
+#define FT1_SLOT_SIZE	0x10	/* bytes */
+
+/* offsets from FT1 slot base i.e. slot 1 start */
+#define FT1_DA0		0x0
+#define FT1_DA1		0x4
+#define FT1_DA0_MASK	0x8
+#define FT1_DA1_MASK	0xc
+
+#define FT1_N_REG(slize, n, reg)	\
+	(offs[slice].ft1_slot_base + FT1_SLOT_SIZE * (n) + (reg))
+
+#define FT1_LEN_MASK		GENMASK(19, 16)
+#define FT1_LEN_SHIFT		16
+#define FT1_LEN(len)		(((len) << FT1_LEN_SHIFT) & FT1_LEN_MASK)
+#define FT1_START_MASK		GENMASK(14, 0)
+#define FT1_START(start)	((start) & FT1_START_MASK)
+#define FT1_MATCH_SLOT(n)	(GENMASK(23, 16) & (BIT(n) << 16))
+
+/* FT1 config type */
+enum ft1_cfg_type {
+	FT1_CFG_TYPE_DISABLED = 0,
+	FT1_CFG_TYPE_EQ,
+	FT1_CFG_TYPE_GT,
+	FT1_CFG_TYPE_LT,
+};
+
+#define FT1_CFG_SHIFT(n)	(2 * (n))
+#define FT1_CFG_MASK(n)		(0x3 << FT1_CFG_SHIFT((n)))
+
+/* Filter 3 -  FT3 */
+#define FT3_NUM_SLOTS	16
+#define FT3_SLOT_SIZE	0x20	/* bytes */
+
+/* offsets from FT3 slot n's base */
+#define FT3_START		0
+#define FT3_START_AUTO		0x4
+#define FT3_START_OFFSET	0x8
+#define FT3_JUMP_OFFSET		0xc
+#define FT3_LEN			0x10
+#define FT3_CFG			0x14
+#define FT3_T			0x18
+#define FT3_T_MASK		0x1c
+
+#define FT3_N_REG(slize, n, reg)	\
+	(offs[slice].ft3_slot_base + FT3_SLOT_SIZE * (n) + (reg))
+
+/* offsets from rx_class n's base */
+#define RX_CLASS_AND_EN		0
+#define RX_CLASS_OR_EN		0x4
+#define RX_CLASS_NUM_SLOTS	16
+#define RX_CLASS_EN_SIZE	0x8	/* bytes */
+
+#define RX_CLASS_N_REG(slice, n, reg)	\
+	(offs[slice].rx_class_base + RX_CLASS_EN_SIZE * (n) + (reg))
+
+/* RX Class Gates */
+#define RX_CLASS_GATES_SIZE	0x4	/* bytes */
+
+#define RX_CLASS_GATES_N_REG(slice, n)	\
+	(offs[slice].rx_class_gates_base + RX_CLASS_GATES_SIZE * (n))
+
+#define RX_CLASS_GATES_ALLOW_MASK	BIT(6)
+#define RX_CLASS_GATES_RAW_MASK		BIT(5)
+#define RX_CLASS_GATES_PHASE_MASK	BIT(4)
+
+/* RX Class traffic data matching bits */
+#define RX_CLASS_FT_UC				BIT(31)
+#define RX_CLASS_FT_MC			BIT(30)
+#define RX_CLASS_FT_BC			BIT(29)
+#define RX_CLASS_FT_FW			BIT(28)
+#define RX_CLASS_FT_RCV			BIT(27)
+#define RX_CLASS_FT_VLAN		BIT(26)
+#define RX_CLASS_FT_DA_P		BIT(25)
+#define RX_CLASS_FT_DA_I		BIT(24)
+#define RX_CLASS_FT_FT1_MATCH_MASK	GENMASK(23, 16)
+#define RX_CLASS_FT_FT1_MATCH_SHIFT	16
+#define RX_CLASS_FT_FT3_MATCH_MASK	GENMASK(15, 0)
+#define RX_CLASS_FT_FT3_MATCH_SHIFT	0
+
+#define RX_CLASS_FT_FT1_MATCH(slot)	\
+	((BIT(slot) << RX_CLASS_FT_FT1_MATCH_SHIFT) & \
+	RX_CLASS_FT_FT1_MATCH_MASK)
+
+/* RX class type */
+enum rx_class_sel_type {
+	RX_CLASS_SEL_TYPE_OR = 0,
+	RX_CLASS_SEL_TYPE_AND = 1,
+	RX_CLASS_SEL_TYPE_OR_AND_AND = 2,
+	RX_CLASS_SEL_TYPE_OR_OR_AND = 3,
+};
+
+#define FT1_CFG_SHIFT(n)	(2 * (n))
+#define FT1_CFG_MASK(n)		(0x3 << FT1_CFG_SHIFT((n)))
+
+#define RX_CLASS_SEL_SHIFT(n)	(2 * (n))
+#define RX_CLASS_SEL_MASK(n)	(0x3 << RX_CLASS_SEL_SHIFT((n)))
+
+#define ICSSG_CFG_OFFSET	0
+#define MAC_INTERFACE_0		0x18
+#define MAC_INTERFACE_1		0x1c
+
+#define ICSSG_CFG_RX_L2_G_EN	BIT(2)
+
+/* These are register offsets per PRU */
+struct miig_rt_offsets {
+	u32 mac0;
+	u32 mac1;
+	u32 ft1_start_len;
+	u32 ft1_cfg;
+	u32 ft1_slot_base;
+	u32 ft3_slot_base;
+	u32 ft3_p_base;
+	u32 ft_rx_ptr;
+	u32 rx_class_base;
+	u32 rx_class_cfg1;
+	u32 rx_class_cfg2;
+	u32 rx_class_gates_base;
+	u32 rx_green;
+	u32 rx_rate_cfg_base;
+	u32 rx_rate_src_sel0;
+	u32 rx_rate_src_sel1;
+	u32 tx_rate_cfg_base;
+	u32 stat_base;
+	u32 tx_hsr_tag;
+	u32 tx_hsr_seq;
+	u32 tx_vlan_type;
+	u32 tx_vlan_ins;
+};
+
+/* These are the offset values for miig_rt_offsets registers */
+static const struct miig_rt_offsets offs[] = {
+	/* PRU0 */
+	{
+		0x8,
+		0xc,
+		0x80,
+		0x84,
+		0x88,
+		0x108,
+		0x308,
+		0x408,
+		0x40c,
+		0x48c,
+		0x490,
+		0x494,
+		0x4d4,
+		0x4e4,
+		0x504,
+		0x508,
+		0x50c,
+		0x54c,
+		0x63c,
+		0x640,
+		0x644,
+		0x648,
+	},
+	/* PRU1 */
+	{
+		0x10,
+		0x14,
+		0x64c,
+		0x650,
+		0x654,
+		0x6d4,
+		0x8d4,
+		0x9d4,
+		0x9d8,
+		0xa58,
+		0xa5c,
+		0xa60,
+		0xaa0,
+		0xab0,
+		0xad0,
+		0xad4,
+		0xad8,
+		0xb18,
+		0xc08,
+		0xc0c,
+		0xc10,
+		0xc14,
+	},
+};
+
+static void rx_class_ft1_set_start_len(struct regmap *miig_rt, int slice,
+				       u16 start, u8 len)
+{
+	u32 offset, val;
+
+	offset = offs[slice].ft1_start_len;
+	val = FT1_LEN(len) | FT1_START(start);
+	regmap_write(miig_rt, offset, val);
+}
+
+static void rx_class_ft1_set_da(struct regmap *miig_rt, int slice,
+				int n, const u8 *addr)
+{
+	u32 offset;
+
+	offset = FT1_N_REG(slice, n, FT1_DA0);
+	regmap_write(miig_rt, offset, (u32)(addr[0] | addr[1] << 8 |
+		     addr[2] << 16 | addr[3] << 24));
+	offset = FT1_N_REG(slice, n, FT1_DA1);
+	regmap_write(miig_rt, offset, (u32)(addr[4] | addr[5] << 8));
+}
+
+static void rx_class_ft1_set_da_mask(struct regmap *miig_rt, int slice,
+				     int n, const u8 *addr)
+{
+	u32 offset;
+
+	offset = FT1_N_REG(slice, n, FT1_DA0_MASK);
+	regmap_write(miig_rt, offset, (u32)(addr[0] | addr[1] << 8 |
+		     addr[2] << 16 | addr[3] << 24));
+	offset = FT1_N_REG(slice, n, FT1_DA1_MASK);
+	regmap_write(miig_rt, offset, (u32)(addr[4] | addr[5] << 8));
+}
+
+static void rx_class_ft1_cfg_set_type(struct regmap *miig_rt, int slice, int n,
+				      enum ft1_cfg_type type)
+{
+	u32 offset;
+
+	offset = offs[slice].ft1_cfg;
+	regmap_update_bits(miig_rt, offset, FT1_CFG_MASK(n),
+			   type << FT1_CFG_SHIFT(n));
+}
+
+static void rx_class_sel_set_type(struct regmap *miig_rt, int slice, int n,
+				  enum rx_class_sel_type type)
+{
+	u32 offset;
+
+	offset = offs[slice].rx_class_cfg1;
+	regmap_update_bits(miig_rt, offset, RX_CLASS_SEL_MASK(n),
+			   type << RX_CLASS_SEL_SHIFT(n));
+}
+
+static void rx_class_set_and(struct regmap *miig_rt, int slice, int n,
+			     u32 data)
+{
+	u32 offset;
+
+	offset = RX_CLASS_N_REG(slice, n, RX_CLASS_AND_EN);
+	regmap_write(miig_rt, offset, data);
+}
+
+static void rx_class_set_or(struct regmap *miig_rt, int slice, int n,
+			    u32 data)
+{
+	u32 offset;
+
+	offset = RX_CLASS_N_REG(slice, n, RX_CLASS_OR_EN);
+	regmap_write(miig_rt, offset, data);
+}
+
+void icssg_class_set_host_mac_addr(struct regmap *miig_rt, const u8 *mac)
+{
+	regmap_write(miig_rt, MAC_INTERFACE_0, (u32)(mac[0] | mac[1] << 8 |
+		     mac[2] << 16 | mac[3] << 24));
+	regmap_write(miig_rt, MAC_INTERFACE_1, (u32)(mac[4] | mac[5] << 8));
+}
+
+void icssg_class_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac)
+{
+	regmap_write(miig_rt, offs[slice].mac0, (u32)(mac[0] | mac[1] << 8 |
+		     mac[2] << 16 | mac[3] << 24));
+	regmap_write(miig_rt, offs[slice].mac1, (u32)(mac[4] | mac[5] << 8));
+}
+
+/* disable all RX traffic */
+void icssg_class_disable(struct regmap *miig_rt, int slice)
+{
+	u32 data, offset;
+	int n;
+
+	/* Enable RX_L2_G */
+	regmap_update_bits(miig_rt, ICSSG_CFG_OFFSET, ICSSG_CFG_RX_L2_G_EN,
+			   ICSSG_CFG_RX_L2_G_EN);
+
+	for (n = 0; n < ICSSG_NUM_CLASSIFIERS; n++) {
+		/* AND_EN = 0 */
+		rx_class_set_and(miig_rt, slice, n, 0);
+		/* OR_EN = 0 */
+		rx_class_set_or(miig_rt, slice, n, 0);
+
+		/* set CFG1 to OR */
+		rx_class_sel_set_type(miig_rt, slice, n, RX_CLASS_SEL_TYPE_OR);
+
+		/* configure gate */
+		offset = RX_CLASS_GATES_N_REG(slice, n);
+		regmap_read(miig_rt, offset, &data);
+		/* clear class_raw so we go through filters */
+		data &= ~RX_CLASS_GATES_RAW_MASK;
+		/* set allow and phase mask */
+		data |= RX_CLASS_GATES_ALLOW_MASK | RX_CLASS_GATES_PHASE_MASK;
+		regmap_write(miig_rt, offset, data);
+	}
+
+	/* FT1 Disabled */
+	for (n = 0; n < ICSSG_NUM_FT1_SLOTS; n++) {
+		const u8 addr[] = { 0, 0, 0, 0, 0, 0, };
+
+		rx_class_ft1_cfg_set_type(miig_rt, slice, n,
+					  FT1_CFG_TYPE_DISABLED);
+		rx_class_ft1_set_da(miig_rt, slice, n, addr);
+		rx_class_ft1_set_da_mask(miig_rt, slice, n, addr);
+	}
+
+	/* clear CFG2 */
+	regmap_write(miig_rt, offs[slice].rx_class_cfg2, 0);
+}
+
+void icssg_class_default(struct regmap *miig_rt, int slice, bool allmulti)
+{
+	u32 data;
+
+	/* defaults */
+	icssg_class_disable(miig_rt, slice);
+
+	/* Setup Classifier */
+	/* match on Broadcast or MAC_PRU address */
+	data = RX_CLASS_FT_BC | RX_CLASS_FT_DA_P;
+
+	/* multicast */
+	if (allmulti)
+		data |= RX_CLASS_FT_MC;
+
+	rx_class_set_or(miig_rt, slice, 0, data);
+
+	/* set CFG1 for OR_OR_AND for classifier */
+	rx_class_sel_set_type(miig_rt, slice, 0, RX_CLASS_SEL_TYPE_OR_OR_AND);
+
+	/* clear CFG2 */
+	regmap_write(miig_rt, offs[slice].rx_class_cfg2, 0);
+}
+
+/* required for SAV check */
+void icssg_ft1_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac_addr)
+{
+	const u8 mask_addr[] = { 0, 0, 0, 0, 0, 0, };
+
+	rx_class_ft1_set_start_len(miig_rt, slice, 0, 6);
+	rx_class_ft1_set_da(miig_rt, slice, 0, mac_addr);
+	rx_class_ft1_set_da_mask(miig_rt, slice, 0, mask_addr);
+	rx_class_ft1_cfg_set_type(miig_rt, slice, 0, FT1_CFG_TYPE_EQ);
+}

drivers/net/ethernet/ti/icssg/icssg_config.c

+// SPDX-License-Identifier: GPL-2.0
+/* ICSSG Ethernet driver
+ *
+ * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com
+ */
+
+#include <linux/iopoll.h>
+#include <linux/regmap.h>
+#include <uapi/linux/if_ether.h>
+#include "icssg_config.h"
+#include "icssg_prueth.h"
+#include "icssg_switch_map.h"
+#include "icssg_mii_rt.h"
+
+/* TX IPG Values to be set for 100M link speed. These values are
+ * in ocp_clk cycles. So need change if ocp_clk is changed for a specific
+ * h/w design.
+ */
+
+/* IPG is in core_clk cycles */
+#define MII_RT_TX_IPG_100M	0x17
+#define MII_RT_TX_IPG_1G	0xb
+
+#define	ICSSG_QUEUES_MAX		64
+#define	ICSSG_QUEUE_OFFSET		0xd00
+#define	ICSSG_QUEUE_PEEK_OFFSET		0xe00
+#define	ICSSG_QUEUE_CNT_OFFSET		0xe40
+#define	ICSSG_QUEUE_RESET_OFFSET	0xf40
+
+#define	ICSSG_NUM_TX_QUEUES	8
+
+#define	RECYCLE_Q_SLICE0	16
+#define	RECYCLE_Q_SLICE1	17
+
+#define	ICSSG_NUM_OTHER_QUEUES	5	/* port, host and special queues */
+
+#define	PORT_HI_Q_SLICE0	32
+#define	PORT_LO_Q_SLICE0	33
+#define	HOST_HI_Q_SLICE0	34
+#define	HOST_LO_Q_SLICE0	35
+#define	HOST_SPL_Q_SLICE0	40	/* Special Queue */
+
+#define	PORT_HI_Q_SLICE1	36
+#define	PORT_LO_Q_SLICE1	37
+#define	HOST_HI_Q_SLICE1	38
+#define	HOST_LO_Q_SLICE1	39
+#define	HOST_SPL_Q_SLICE1	41	/* Special Queue */
+
+#define MII_RXCFG_DEFAULT	(PRUSS_MII_RT_RXCFG_RX_ENABLE | \
+				 PRUSS_MII_RT_RXCFG_RX_DATA_RDY_MODE_DIS | \
+				 PRUSS_MII_RT_RXCFG_RX_L2_EN | \
+				 PRUSS_MII_RT_RXCFG_RX_L2_EOF_SCLR_DIS)
+
+#define MII_TXCFG_DEFAULT	(PRUSS_MII_RT_TXCFG_TX_ENABLE | \
+				 PRUSS_MII_RT_TXCFG_TX_AUTO_PREAMBLE | \
+				 PRUSS_MII_RT_TXCFG_TX_32_MODE_EN | \
+				 PRUSS_MII_RT_TXCFG_TX_IPG_WIRE_CLK_EN)
+
+#define ICSSG_CFG_DEFAULT	(ICSSG_CFG_TX_L1_EN | \
+				 ICSSG_CFG_TX_L2_EN | ICSSG_CFG_RX_L2_G_EN | \
+				 ICSSG_CFG_TX_PRU_EN | \
+				 ICSSG_CFG_SGMII_MODE)
+
+#define FDB_GEN_CFG1		0x60
+#define SMEM_VLAN_OFFSET	8
+#define SMEM_VLAN_OFFSET_MASK	GENMASK(25, 8)
+
+#define FDB_GEN_CFG2		0x64
+#define FDB_VLAN_EN		BIT(6)
+#define FDB_HOST_EN		BIT(2)
+#define FDB_PRU1_EN		BIT(1)
+#define FDB_PRU0_EN		BIT(0)
+#define FDB_EN_ALL		(FDB_PRU0_EN | FDB_PRU1_EN | \
+				 FDB_HOST_EN | FDB_VLAN_EN)
+
+/**
+ * struct map - ICSSG Queue Map
+ * @queue: Queue number
+ * @pd_addr_start: Packet descriptor queue reserved memory
+ * @flags: Flags
+ * @special: Indicates whether this queue is a special queue or not
+ */
+struct map {
+	int queue;
+	u32 pd_addr_start;
+	u32 flags;
+	bool special;
+};
+
+/* Hardware queue map for ICSSG */
+static const struct map hwq_map[2][ICSSG_NUM_OTHER_QUEUES] = {
+	{
+		{ PORT_HI_Q_SLICE0, PORT_DESC0_HI, 0x200000, 0 },
+		{ PORT_LO_Q_SLICE0, PORT_DESC0_LO, 0, 0 },
+		{ HOST_HI_Q_SLICE0, HOST_DESC0_HI, 0x200000, 0 },
+		{ HOST_LO_Q_SLICE0, HOST_DESC0_LO, 0, 0 },
+		{ HOST_SPL_Q_SLICE0, HOST_SPPD0, 0x400000, 1 },
+	},
+	{
+		{ PORT_HI_Q_SLICE1, PORT_DESC1_HI, 0xa00000, 0 },
+		{ PORT_LO_Q_SLICE1, PORT_DESC1_LO, 0x800000, 0 },
+		{ HOST_HI_Q_SLICE1, HOST_DESC1_HI, 0xa00000, 0 },
+		{ HOST_LO_Q_SLICE1, HOST_DESC1_LO, 0x800000, 0 },
+		{ HOST_SPL_Q_SLICE1, HOST_SPPD1, 0xc00000, 1 },
+	},
+};
+
+static void icssg_config_mii_init(struct prueth_emac *emac)
+{
+	u32 rxcfg, txcfg, rxcfg_reg, txcfg_reg, pcnt_reg;
+	struct prueth *prueth = emac->prueth;
+	int slice = prueth_emac_slice(emac);
+	struct regmap *mii_rt;
+
+	mii_rt = prueth->mii_rt;
+
+	rxcfg_reg = (slice == ICSS_MII0) ? PRUSS_MII_RT_RXCFG0 :
+				       PRUSS_MII_RT_RXCFG1;
+	txcfg_reg = (slice == ICSS_MII0) ? PRUSS_MII_RT_TXCFG0 :
+				       PRUSS_MII_RT_TXCFG1;
+	pcnt_reg = (slice == ICSS_MII0) ? PRUSS_MII_RT_RX_PCNT0 :
+				       PRUSS_MII_RT_RX_PCNT1;
+
+	rxcfg = MII_RXCFG_DEFAULT;
+	txcfg = MII_TXCFG_DEFAULT;
+
+	if (slice == ICSS_MII1)
+		rxcfg |= PRUSS_MII_RT_RXCFG_RX_MUX_SEL;
+
+	/* In MII mode TX lines swapped inside ICSSG, so TX_MUX_SEL cfg need
+	 * to be swapped also comparing to RGMII mode.
+	 */
+	if (emac->phy_if == PHY_INTERFACE_MODE_MII && slice == ICSS_MII0)
+		txcfg |= PRUSS_MII_RT_TXCFG_TX_MUX_SEL;
+	else if (emac->phy_if != PHY_INTERFACE_MODE_MII && slice == ICSS_MII1)
+		txcfg |= PRUSS_MII_RT_TXCFG_TX_MUX_SEL;
+
+	regmap_write(mii_rt, rxcfg_reg, rxcfg);
+	regmap_write(mii_rt, txcfg_reg, txcfg);
+	regmap_write(mii_rt, pcnt_reg, 0x1);
+}
+
+static void icssg_miig_queues_init(struct prueth *prueth, int slice)
+{
+	struct regmap *miig_rt = prueth->miig_rt;
+	void __iomem *smem = prueth->shram.va;
+	u8 pd[ICSSG_SPECIAL_PD_SIZE];
+	int queue = 0, i, j;
+	u32 *pdword;
+
+	/* reset hwqueues */
+	if (slice)
+		queue = ICSSG_NUM_TX_QUEUES;
+
+	for (i = 0; i < ICSSG_NUM_TX_QUEUES; i++) {
+		regmap_write(miig_rt, ICSSG_QUEUE_RESET_OFFSET, queue);
+		queue++;
+	}
+
+	queue = slice ? RECYCLE_Q_SLICE1 : RECYCLE_Q_SLICE0;
+	regmap_write(miig_rt, ICSSG_QUEUE_RESET_OFFSET, queue);
+
+	for (i = 0; i < ICSSG_NUM_OTHER_QUEUES; i++) {
+		regmap_write(miig_rt, ICSSG_QUEUE_RESET_OFFSET,
+			     hwq_map[slice][i].queue);
+	}
+
+	/* initialize packet descriptors in SMEM */
+	/* push pakcet descriptors to hwqueues */
+
+	pdword = (u32 *)pd;
+	for (j = 0; j < ICSSG_NUM_OTHER_QUEUES; j++) {
+		const struct map *mp;
+		int pd_size, num_pds;
+		u32 pdaddr;
+
+		mp = &hwq_map[slice][j];
+		if (mp->special) {
+			pd_size = ICSSG_SPECIAL_PD_SIZE;
+			num_pds = ICSSG_NUM_SPECIAL_PDS;
+		} else	{
+			pd_size = ICSSG_NORMAL_PD_SIZE;
+			num_pds = ICSSG_NUM_NORMAL_PDS;
+		}
+
+		for (i = 0; i < num_pds; i++) {
+			memset(pd, 0, pd_size);
+
+			pdword[0] &= ICSSG_FLAG_MASK;
+			pdword[0] |= mp->flags;
+			pdaddr = mp->pd_addr_start + i * pd_size;
+
+			memcpy_toio(smem + pdaddr, pd, pd_size);
+			queue = mp->queue;
+			regmap_write(miig_rt, ICSSG_QUEUE_OFFSET + 4 * queue,
+				     pdaddr);
+		}
+	}
+}
+
+void icssg_config_ipg(struct prueth_emac *emac)
+{
+	struct prueth *prueth = emac->prueth;
+	int slice = prueth_emac_slice(emac);
+
+	switch (emac->speed) {
+	case SPEED_1000:
+		icssg_mii_update_ipg(prueth->mii_rt, slice, MII_RT_TX_IPG_1G);
+		break;
+	case SPEED_100:
+		icssg_mii_update_ipg(prueth->mii_rt, slice, MII_RT_TX_IPG_100M);
+		break;
+	default:
+		/* Other links speeds not supported */
+		netdev_err(emac->ndev, "Unsupported link speed\n");
+		return;
+	}
+}
+
+static void emac_r30_cmd_init(struct prueth_emac *emac)
+{
+	struct icssg_r30_cmd __iomem *p;
+	int i;
+
+	p = emac->dram.va + MGR_R30_CMD_OFFSET;
+
+	for (i = 0; i < 4; i++)
+		writel(EMAC_NONE, &p->cmd[i]);
+}
+
+static int emac_r30_is_done(struct prueth_emac *emac)
+{
+	const struct icssg_r30_cmd __iomem *p;
+	u32 cmd;
+	int i;
+
+	p = emac->dram.va + MGR_R30_CMD_OFFSET;
+
+	for (i = 0; i < 4; i++) {
+		cmd = readl(&p->cmd[i]);
+		if (cmd != EMAC_NONE)
+			return 0;
+	}
+
+	return 1;
+}
+
+static int prueth_emac_buffer_setup(struct prueth_emac *emac)
+{
+	struct icssg_buffer_pool_cfg __iomem *bpool_cfg;
+	struct icssg_rxq_ctx __iomem *rxq_ctx;
+	struct prueth *prueth = emac->prueth;
+	int slice = prueth_emac_slice(emac);
+	u32 addr;
+	int i;
+
+	/* Layout to have 64KB aligned buffer pool
+	 * |BPOOL0|BPOOL1|RX_CTX0|RX_CTX1|
+	 */
+
+	addr = lower_32_bits(prueth->msmcram.pa);
+	if (slice)
+		addr += PRUETH_NUM_BUF_POOLS * PRUETH_EMAC_BUF_POOL_SIZE;
+
+	if (addr % SZ_64K) {
+		dev_warn(prueth->dev, "buffer pool needs to be 64KB aligned\n");
+		return -EINVAL;
+	}
+
+	bpool_cfg = emac->dram.va + BUFFER_POOL_0_ADDR_OFFSET;
+	/* workaround for f/w bug. bpool 0 needs to be initilalized */
+	writel(addr, &bpool_cfg[0].addr);
+	writel(0, &bpool_cfg[0].len);
+
+	for (i = PRUETH_EMAC_BUF_POOL_START;
+	     i < PRUETH_EMAC_BUF_POOL_START + PRUETH_NUM_BUF_POOLS;
+	     i++) {
+		writel(addr, &bpool_cfg[i].addr);
+		writel(PRUETH_EMAC_BUF_POOL_SIZE, &bpool_cfg[i].len);
+		addr += PRUETH_EMAC_BUF_POOL_SIZE;
+	}
+
+	if (!slice)
+		addr += PRUETH_NUM_BUF_POOLS * PRUETH_EMAC_BUF_POOL_SIZE;
+	else
+		addr += PRUETH_EMAC_RX_CTX_BUF_SIZE * 2;
+
+	/* Pre-emptible RX buffer queue */
+	rxq_ctx = emac->dram.va + HOST_RX_Q_PRE_CONTEXT_OFFSET;
+	for (i = 0; i < 3; i++)
+		writel(addr, &rxq_ctx->start[i]);
+
+	addr += PRUETH_EMAC_RX_CTX_BUF_SIZE;
+	writel(addr, &rxq_ctx->end);
+
+	/* Express RX buffer queue */
+	rxq_ctx = emac->dram.va + HOST_RX_Q_EXP_CONTEXT_OFFSET;
+	for (i = 0; i < 3; i++)
+		writel(addr, &rxq_ctx->start[i]);
+
+	addr += PRUETH_EMAC_RX_CTX_BUF_SIZE;
+	writel(addr, &rxq_ctx->end);
+
+	return 0;
+}
+
+static void icssg_init_emac_mode(struct prueth *prueth)
+{
+	/* When the device is configured as a bridge and it is being brought
+	 * back to the emac mode, the host mac address has to be set as 0.
+	 */
+	u8 mac[ETH_ALEN] = { 0 };
+
+	if (prueth->emacs_initialized)
+		return;
+
+	regmap_update_bits(prueth->miig_rt, FDB_GEN_CFG1,
+			   SMEM_VLAN_OFFSET_MASK, 0);
+	regmap_write(prueth->miig_rt, FDB_GEN_CFG2, 0);
+	/* Clear host MAC address */
+	icssg_class_set_host_mac_addr(prueth->miig_rt, mac);
+}
+
+int icssg_config(struct prueth *prueth, struct prueth_emac *emac, int slice)
+{
+	void __iomem *config = emac->dram.va + ICSSG_CONFIG_OFFSET;
+	struct icssg_flow_cfg __iomem *flow_cfg;
+	int ret;
+
+	icssg_init_emac_mode(prueth);
+
+	memset_io(config, 0, TAS_GATE_MASK_LIST0);
+	icssg_miig_queues_init(prueth, slice);
+
+	emac->speed = SPEED_1000;
+	emac->duplex = DUPLEX_FULL;
+	if (!phy_interface_mode_is_rgmii(emac->phy_if)) {
+		emac->speed = SPEED_100;
+		emac->duplex = DUPLEX_FULL;
+	}
+	regmap_update_bits(prueth->miig_rt, ICSSG_CFG_OFFSET,
+			   ICSSG_CFG_DEFAULT, ICSSG_CFG_DEFAULT);
+	icssg_miig_set_interface_mode(prueth->miig_rt, slice, emac->phy_if);
+	icssg_config_mii_init(emac);
+	icssg_config_ipg(emac);
+	icssg_update_rgmii_cfg(prueth->miig_rt, emac);
+
+	/* set GPI mode */
+	pruss_cfg_gpimode(prueth->pruss, prueth->pru_id[slice],
+			  PRUSS_GPI_MODE_MII);
+
+	/* enable XFR shift for PRU and RTU */
+	pruss_cfg_xfr_enable(prueth->pruss, PRU_TYPE_PRU, true);
+	pruss_cfg_xfr_enable(prueth->pruss, PRU_TYPE_RTU, true);
+
+	/* set C28 to 0x100 */
+	pru_rproc_set_ctable(prueth->pru[slice], PRU_C28, 0x100 << 8);
+	pru_rproc_set_ctable(prueth->rtu[slice], PRU_C28, 0x100 << 8);
+	pru_rproc_set_ctable(prueth->txpru[slice], PRU_C28, 0x100 << 8);
+
+	flow_cfg = config + PSI_L_REGULAR_FLOW_ID_BASE_OFFSET;
+	writew(emac->rx_flow_id_base, &flow_cfg->rx_base_flow);
+	writew(0, &flow_cfg->mgm_base_flow);
+	writeb(0, config + SPL_PKT_DEFAULT_PRIORITY);
+	writeb(0, config + QUEUE_NUM_UNTAGGED);
+
+	ret = prueth_emac_buffer_setup(emac);
+	if (ret)
+		return ret;
+
+	emac_r30_cmd_init(emac);
+
+	return 0;
+}
+
+/* Bitmask for ICSSG r30 commands */
+static const struct icssg_r30_cmd emac_r32_bitmask[] = {
+	{{0xffff0004, 0xffff0100, 0xffff0100, EMAC_NONE}},	/* EMAC_PORT_DISABLE */
+	{{0xfffb0040, 0xfeff0200, 0xfeff0200, EMAC_NONE}},	/* EMAC_PORT_BLOCK */
+	{{0xffbb0000, 0xfcff0000, 0xdcff0000, EMAC_NONE}},	/* EMAC_PORT_FORWARD */
+	{{0xffbb0000, 0xfcff0000, 0xfcff2000, EMAC_NONE}},	/* EMAC_PORT_FORWARD_WO_LEARNING */
+	{{0xffff0001, EMAC_NONE,  EMAC_NONE, EMAC_NONE}},	/* ACCEPT ALL */
+	{{0xfffe0002, EMAC_NONE,  EMAC_NONE, EMAC_NONE}},	/* ACCEPT TAGGED */
+	{{0xfffc0000, EMAC_NONE,  EMAC_NONE, EMAC_NONE}},	/* ACCEPT UNTAGGED and PRIO */
+	{{EMAC_NONE,  0xffff0020, EMAC_NONE, EMAC_NONE}},	/* TAS Trigger List change */
+	{{EMAC_NONE,  0xdfff1000, EMAC_NONE, EMAC_NONE}},	/* TAS set state ENABLE*/
+	{{EMAC_NONE,  0xefff2000, EMAC_NONE, EMAC_NONE}},	/* TAS set state RESET*/
+	{{EMAC_NONE,  0xcfff0000, EMAC_NONE, EMAC_NONE}},	/* TAS set state DISABLE*/
+	{{EMAC_NONE,  EMAC_NONE,  0xffff0400, EMAC_NONE}},	/* UC flooding ENABLE*/
+	{{EMAC_NONE,  EMAC_NONE,  0xfbff0000, EMAC_NONE}},	/* UC flooding DISABLE*/
+	{{EMAC_NONE,  EMAC_NONE,  0xffff0800, EMAC_NONE}},	/* MC flooding ENABLE*/
+	{{EMAC_NONE,  EMAC_NONE,  0xf7ff0000, EMAC_NONE}},	/* MC flooding DISABLE*/
+	{{EMAC_NONE,  0xffff4000, EMAC_NONE, EMAC_NONE}},	/* Preemption on Tx ENABLE*/
+	{{EMAC_NONE,  0xbfff0000, EMAC_NONE, EMAC_NONE}},	/* Preemption on Tx DISABLE*/
+	{{0xffff0010,  EMAC_NONE, 0xffff0010, EMAC_NONE}},	/* VLAN AWARE*/
+	{{0xffef0000,  EMAC_NONE, 0xffef0000, EMAC_NONE}}	/* VLAN UNWARE*/
+};
+
+int emac_set_port_state(struct prueth_emac *emac,
+			enum icssg_port_state_cmd cmd)
+{
+	struct icssg_r30_cmd __iomem *p;
+	int ret = -ETIMEDOUT;
+	int done = 0;
+	int i;
+
+	p = emac->dram.va + MGR_R30_CMD_OFFSET;
+
+	if (cmd >= ICSSG_EMAC_PORT_MAX_COMMANDS) {
+		netdev_err(emac->ndev, "invalid port command\n");
+		return -EINVAL;
+	}
+
+	/* only one command at a time allowed to firmware */
+	mutex_lock(&emac->cmd_lock);
+
+	for (i = 0; i < 4; i++)
+		writel(emac_r32_bitmask[cmd].cmd[i], &p->cmd[i]);
+
+	/* wait for done */
+	ret = read_poll_timeout(emac_r30_is_done, done, done == 1,
+				1000, 10000, false, emac);
+
+	if (ret == -ETIMEDOUT)
+		netdev_err(emac->ndev, "timeout waiting for command done\n");
+
+	mutex_unlock(&emac->cmd_lock);
+
+	return ret;
+}
+
+void icssg_config_set_speed(struct prueth_emac *emac)
+{
+	u8 fw_speed;
+
+	switch (emac->speed) {
+	case SPEED_1000:
+		fw_speed = FW_LINK_SPEED_1G;
+		break;
+	case SPEED_100:
+		fw_speed = FW_LINK_SPEED_100M;
+		break;
+	default:
+		/* Other links speeds not supported */
+		netdev_err(emac->ndev, "Unsupported link speed\n");
+		return;
+	}
+
+	writeb(fw_speed, emac->dram.va + PORT_LINK_SPEED_OFFSET);
+}

drivers/net/ethernet/ti/icssg/icssg_config.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/* Texas Instruments ICSSG Ethernet driver
+ *
+ * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
+ *
+ */
+
+#ifndef __NET_TI_ICSSG_CONFIG_H
+#define __NET_TI_ICSSG_CONFIG_H
+
+struct icssg_buffer_pool_cfg {
+	__le32	addr;
+	__le32	len;
+} __packed;
+
+struct icssg_flow_cfg {
+	__le16 rx_base_flow;
+	__le16 mgm_base_flow;
+} __packed;
+
+#define PRUETH_PKT_TYPE_CMD	0x10
+#define PRUETH_NAV_PS_DATA_SIZE	16	/* Protocol specific data size */
+#define PRUETH_NAV_SW_DATA_SIZE	16	/* SW related data size */
+#define PRUETH_MAX_TX_DESC	512
+#define PRUETH_MAX_RX_DESC	512
+#define PRUETH_MAX_RX_FLOWS	1	/* excluding default flow */
+#define PRUETH_RX_FLOW_DATA	0
+
+#define PRUETH_EMAC_BUF_POOL_SIZE	SZ_8K
+#define PRUETH_EMAC_POOLS_PER_SLICE	24
+#define PRUETH_EMAC_BUF_POOL_START	8
+#define PRUETH_NUM_BUF_POOLS	8
+#define PRUETH_EMAC_RX_CTX_BUF_SIZE	SZ_16K	/* per slice */
+#define MSMC_RAM_SIZE	\
+	(2 * (PRUETH_EMAC_BUF_POOL_SIZE * PRUETH_NUM_BUF_POOLS + \
+	 PRUETH_EMAC_RX_CTX_BUF_SIZE * 2))
+
+struct icssg_rxq_ctx {
+	__le32 start[3];
+	__le32 end;
+} __packed;
+
+/* Load time Fiwmware Configuration */
+
+#define ICSSG_FW_MGMT_CMD_HEADER	0x81
+#define ICSSG_FW_MGMT_FDB_CMD_TYPE	0x03
+#define ICSSG_FW_MGMT_CMD_TYPE		0x04
+#define ICSSG_FW_MGMT_PKT		0x80000000
+
+struct icssg_r30_cmd {
+	u32 cmd[4];
+} __packed;
+
+enum icssg_port_state_cmd {
+	ICSSG_EMAC_PORT_DISABLE = 0,
+	ICSSG_EMAC_PORT_BLOCK,
+	ICSSG_EMAC_PORT_FORWARD,
+	ICSSG_EMAC_PORT_FORWARD_WO_LEARNING,
+	ICSSG_EMAC_PORT_ACCEPT_ALL,
+	ICSSG_EMAC_PORT_ACCEPT_TAGGED,
+	ICSSG_EMAC_PORT_ACCEPT_UNTAGGED_N_PRIO,
+	ICSSG_EMAC_PORT_TAS_TRIGGER,
+	ICSSG_EMAC_PORT_TAS_ENABLE,
+	ICSSG_EMAC_PORT_TAS_RESET,
+	ICSSG_EMAC_PORT_TAS_DISABLE,
+	ICSSG_EMAC_PORT_UC_FLOODING_ENABLE,
+	ICSSG_EMAC_PORT_UC_FLOODING_DISABLE,
+	ICSSG_EMAC_PORT_MC_FLOODING_ENABLE,
+	ICSSG_EMAC_PORT_MC_FLOODING_DISABLE,
+	ICSSG_EMAC_PORT_PREMPT_TX_ENABLE,
+	ICSSG_EMAC_PORT_PREMPT_TX_DISABLE,
+	ICSSG_EMAC_PORT_VLAN_AWARE_ENABLE,
+	ICSSG_EMAC_PORT_VLAN_AWARE_DISABLE,
+	ICSSG_EMAC_PORT_MAX_COMMANDS
+};
+
+#define EMAC_NONE           0xffff0000
+#define EMAC_PRU0_P_DI      0xffff0004
+#define EMAC_PRU1_P_DI      0xffff0040
+#define EMAC_TX_P_DI        0xffff0100
+
+#define EMAC_PRU0_P_EN      0xfffb0000
+#define EMAC_PRU1_P_EN      0xffbf0000
+#define EMAC_TX_P_EN        0xfeff0000
+
+#define EMAC_P_BLOCK        0xffff0040
+#define EMAC_TX_P_BLOCK     0xffff0200
+#define EMAC_P_UNBLOCK      0xffbf0000
+#define EMAC_TX_P_UNBLOCK   0xfdff0000
+#define EMAC_LEAN_EN        0xfff70000
+#define EMAC_LEAN_DI        0xffff0008
+
+#define EMAC_ACCEPT_ALL     0xffff0001
+#define EMAC_ACCEPT_TAG     0xfffe0002
+#define EMAC_ACCEPT_PRIOR   0xfffc0000
+
+/* Config area lies in DRAM */
+#define ICSSG_CONFIG_OFFSET	0x0
+
+/* Config area lies in shared RAM */
+#define ICSSG_CONFIG_OFFSET_SLICE0   0
+#define ICSSG_CONFIG_OFFSET_SLICE1   0x8000
+
+#define ICSSG_NUM_NORMAL_PDS	64
+#define ICSSG_NUM_SPECIAL_PDS	16
+
+#define ICSSG_NORMAL_PD_SIZE	8
+#define ICSSG_SPECIAL_PD_SIZE	20
+
+#define ICSSG_FLAG_MASK		0xff00ffff
+
+struct icssg_setclock_desc {
+	u8 request;
+	u8 restore;
+	u8 acknowledgment;
+	u8 cmp_status;
+	u32 margin;
+	u32 cyclecounter0_set;
+	u32 cyclecounter1_set;
+	u32 iepcount_set;
+	u32 rsvd1;
+	u32 rsvd2;
+	u32 CMP0_current;
+	u32 iepcount_current;
+	u32 difference;
+	u32 cyclecounter0_new;
+	u32 cyclecounter1_new;
+	u32 CMP0_new;
+} __packed;
+
+#define ICSSG_CMD_POP_SLICE0	56
+#define ICSSG_CMD_POP_SLICE1	60
+
+#define ICSSG_CMD_PUSH_SLICE0	57
+#define ICSSG_CMD_PUSH_SLICE1	61
+
+#define ICSSG_RSP_POP_SLICE0	58
+#define ICSSG_RSP_POP_SLICE1	62
+
+#define ICSSG_RSP_PUSH_SLICE0	56
+#define ICSSG_RSP_PUSH_SLICE1	60
+
+#define ICSSG_TS_POP_SLICE0	59
+#define ICSSG_TS_POP_SLICE1	63
+
+#define ICSSG_TS_PUSH_SLICE0	40
+#define ICSSG_TS_PUSH_SLICE1	41
+
+/* FDB FID_C2 flag definitions */
+/* Indicates host port membership.*/
+#define ICSSG_FDB_ENTRY_P0_MEMBERSHIP         BIT(0)
+/* Indicates that MAC ID is connected to physical port 1 */
+#define ICSSG_FDB_ENTRY_P1_MEMBERSHIP         BIT(1)
+/* Indicates that MAC ID is connected to physical port 2 */
+#define ICSSG_FDB_ENTRY_P2_MEMBERSHIP         BIT(2)
+/* Ageable bit is set for learned entries and cleared for static entries */
+#define ICSSG_FDB_ENTRY_AGEABLE               BIT(3)
+/* If set for DA then packet is determined to be a special packet */
+#define ICSSG_FDB_ENTRY_BLOCK                 BIT(4)
+/* If set for DA then the SA from the packet is not learned */
+#define ICSSG_FDB_ENTRY_SECURE                BIT(5)
+/* If set, it means packet has been seen recently with source address + FID
+ * matching MAC address/FID of entry
+ */
+#define ICSSG_FDB_ENTRY_TOUCHED               BIT(6)
+/* Set if entry is valid */
+#define ICSSG_FDB_ENTRY_VALID                 BIT(7)
+
+/**
+ * struct prueth_vlan_tbl - VLAN table entries struct in ICSSG SMEM
+ * @fid_c1: membership and forwarding rules flag to this table. See
+ *          above to defines for bit definitions
+ * @fid: FDB index for this VID (there is 1-1 mapping b/w VID and FID)
+ */
+struct prueth_vlan_tbl {
+	u8 fid_c1;
+	u8 fid;
+} __packed;
+
+/**
+ * struct prueth_fdb_slot - Result of FDB slot lookup
+ * @mac: MAC address
+ * @fid: fid to be associated with MAC
+ * @fid_c2: FID_C2 entry for this MAC
+ */
+struct prueth_fdb_slot {
+	u8 mac[ETH_ALEN];
+	u8 fid;
+	u8 fid_c2;
+} __packed;
+
+enum icssg_ietfpe_verify_states {
+	ICSSG_IETFPE_STATE_UNKNOWN = 0,
+	ICSSG_IETFPE_STATE_INITIAL,
+	ICSSG_IETFPE_STATE_VERIFYING,
+	ICSSG_IETFPE_STATE_SUCCEEDED,
+	ICSSG_IETFPE_STATE_FAILED,
+	ICSSG_IETFPE_STATE_DISABLED
+};
+#endif /* __NET_TI_ICSSG_CONFIG_H */

drivers/net/ethernet/ti/icssg/icssg_prueth.h

@@ -194,4 +194,19 @@ static inline int prueth_emac_slice(struct prueth_emac *emac)
 	}
 }
 
+/* Classifier helpers */
+void icssg_class_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac);
+void icssg_class_set_host_mac_addr(struct regmap *miig_rt, const u8 *mac);
+void icssg_class_disable(struct regmap *miig_rt, int slice);
+void icssg_class_default(struct regmap *miig_rt, int slice, bool allmulti);
+void icssg_ft1_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac_addr);
+
+/* config helpers */
+void icssg_config_ipg(struct prueth_emac *emac);
+int icssg_config(struct prueth *prueth, struct prueth_emac *emac,
+		 int slice);
+int emac_set_port_state(struct prueth_emac *emac,
+			enum icssg_port_state_cmd state);
+void icssg_config_set_speed(struct prueth_emac *emac);
+
 #endif /* __NET_TI_ICSSG_PRUETH_H */