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Commit 7318166c authored by Florian Fainelli's avatar Florian Fainelli Committed by David S. Miller
Browse files

net: dsa: bcm_sf2: Add support for ethtool::rxnfc 



Add support for configuring classification rules using the
ethtool::rxnfc API.  This is useful to program the switch's CFP/TCAM to
redirect specific packets to specific ports/queues for instance. For
now, we allow any kind of IPv4 5-tuple matching.

Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 85345808

drivers/net/dsa/Makefile

+1 −0
Original line number Diff line number Diff line 
obj-$(CONFIG_NET_DSA_MV88E6060) += mv88e6060.o

obj-$(CONFIG_NET_DSA_BCM_SF2)	+= bcm_sf2.o

bcm_sf2-objs			+= bcm_sf2_cfp.o

obj-$(CONFIG_NET_DSA_QCA8K)	+= qca8k.o



obj-y				+= b53/

drivers/net/dsa/bcm_sf2.c

+14 −0
Original line number Diff line number Diff line
@@ -1045,6 +1045,8 @@ static const struct dsa_switch_ops bcm_sf2_ops = { 
	.port_fdb_dump		= b53_fdb_dump,

	.port_fdb_add		= b53_fdb_add,

	.port_fdb_del		= b53_fdb_del,

	.get_rxnfc		= bcm_sf2_get_rxnfc,

	.set_rxnfc		= bcm_sf2_set_rxnfc,

};



struct bcm_sf2_of_data {
@@ -1168,6 +1170,12 @@ static int bcm_sf2_sw_probe(struct platform_device *pdev) 


	spin_lock_init(&priv->indir_lock);

	mutex_init(&priv->stats_mutex);

	mutex_init(&priv->cfp.lock);



	/* CFP rule #0 cannot be used for specific classifications, flag it as

	 * permanently used

	 */

	set_bit(0, priv->cfp.used);



	bcm_sf2_identify_ports(priv, dn->child);
@@ -1197,6 +1205,12 @@ static int bcm_sf2_sw_probe(struct platform_device *pdev) 
		return ret;

	}



	ret = bcm_sf2_cfp_rst(priv);

	if (ret) {

		pr_err("failed to reset CFP\n");

		goto out_mdio;

	}



	/* Disable all interrupts and request them */

	bcm_sf2_intr_disable(priv);

drivers/net/dsa/bcm_sf2.h

+17 −0
Original line number Diff line number Diff line
@@ -52,6 +52,13 @@ struct bcm_sf2_port_status { 
	struct ethtool_eee eee;

};



struct bcm_sf2_cfp_priv {

	/* Mutex protecting concurrent accesses to the CFP registers */

	struct mutex lock;

	DECLARE_BITMAP(used, CFP_NUM_RULES);

	unsigned int rules_cnt;

};



struct bcm_sf2_priv {

	/* Base registers, keep those in order with BCM_SF2_REGS_NAME */

	void __iomem			*core;
@@ -103,6 +110,9 @@ struct bcm_sf2_priv { 


	/* Bitmask of ports needing BRCM tags */

	unsigned int			brcm_tag_mask;



	/* CFP rules context */

	struct bcm_sf2_cfp_priv		cfp;

};



static inline struct bcm_sf2_priv *bcm_sf2_to_priv(struct dsa_switch *ds)
@@ -197,4 +207,11 @@ SF2_IO_MACRO(acb); 
SWITCH_INTR_L2(0);

SWITCH_INTR_L2(1);



/* RXNFC */

int bcm_sf2_get_rxnfc(struct dsa_switch *ds, int port,

		      struct ethtool_rxnfc *nfc, u32 *rule_locs);

int bcm_sf2_set_rxnfc(struct dsa_switch *ds, int port,

		      struct ethtool_rxnfc *nfc);

int bcm_sf2_cfp_rst(struct bcm_sf2_priv *priv);



#endif /* __BCM_SF2_H */

drivers/net/dsa/bcm_sf2_cfp.c

0 → 100644
+613 −0
Original line number Diff line number Diff line 
/*

 * Broadcom Starfighter 2 DSA switch CFP support

 *

 * Copyright (C) 2016, Broadcom

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */



#include <linux/list.h>

#include <net/dsa.h>

#include <linux/ethtool.h>

#include <linux/if_ether.h>

#include <linux/in.h>

#include <linux/bitmap.h>



#include "bcm_sf2.h"

#include "bcm_sf2_regs.h"



struct cfp_udf_layout {

	u8 slices[UDF_NUM_SLICES];

	u32 mask_value;



};



/* UDF slices layout for a TCPv4/UDPv4 specification */

static const struct cfp_udf_layout udf_tcpip4_layout = {

	.slices = {

		/* End of L2, byte offset 12, src IP[0:15] */

		CFG_UDF_EOL2 | 6,

		/* End of L2, byte offset 14, src IP[16:31] */

		CFG_UDF_EOL2 | 7,

		/* End of L2, byte offset 16, dst IP[0:15] */

		CFG_UDF_EOL2 | 8,

		/* End of L2, byte offset 18, dst IP[16:31] */

		CFG_UDF_EOL2 | 9,

		/* End of L3, byte offset 0, src port */

		CFG_UDF_EOL3 | 0,

		/* End of L3, byte offset 2, dst port */

		CFG_UDF_EOL3 | 1,

		0, 0, 0

	},

	.mask_value = L3_FRAMING_MASK | IPPROTO_MASK | IP_FRAG,

};



static inline unsigned int bcm_sf2_get_num_udf_slices(const u8 *layout)

{

	unsigned int i, count = 0;



	for (i = 0; i < UDF_NUM_SLICES; i++) {

		if (layout[i] != 0)

			count++;

	}



	return count;

}



static void bcm_sf2_cfp_udf_set(struct bcm_sf2_priv *priv,

				unsigned int slice_num,

				const u8 *layout)

{

	u32 offset = CORE_UDF_0_A_0_8_PORT_0 + slice_num * UDF_SLICE_OFFSET;

	unsigned int i;



	for (i = 0; i < UDF_NUM_SLICES; i++)

		core_writel(priv, layout[i], offset + i * 4);

}



static int bcm_sf2_cfp_op(struct bcm_sf2_priv *priv, unsigned int op)

{

	unsigned int timeout = 1000;

	u32 reg;



	reg = core_readl(priv, CORE_CFP_ACC);

	reg &= ~(OP_SEL_MASK | RAM_SEL_MASK);

	reg |= OP_STR_DONE | op;

	core_writel(priv, reg, CORE_CFP_ACC);



	do {

		reg = core_readl(priv, CORE_CFP_ACC);

		if (!(reg & OP_STR_DONE))

			break;



		cpu_relax();

	} while (timeout--);



	if (!timeout)

		return -ETIMEDOUT;



	return 0;

}



static inline void bcm_sf2_cfp_rule_addr_set(struct bcm_sf2_priv *priv,

					     unsigned int addr)

{

	u32 reg;



	WARN_ON(addr >= CFP_NUM_RULES);



	reg = core_readl(priv, CORE_CFP_ACC);

	reg &= ~(XCESS_ADDR_MASK << XCESS_ADDR_SHIFT);

	reg |= addr << XCESS_ADDR_SHIFT;

	core_writel(priv, reg, CORE_CFP_ACC);

}



static inline unsigned int bcm_sf2_cfp_rule_size(struct bcm_sf2_priv *priv)

{

	/* Entry #0 is reserved */

	return CFP_NUM_RULES - 1;

}



static int bcm_sf2_cfp_rule_set(struct dsa_switch *ds, int port,

				struct ethtool_rx_flow_spec *fs)

{

	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);

	struct ethtool_tcpip4_spec *v4_spec;

	const struct cfp_udf_layout *layout;

	unsigned int slice_num, rule_index;

	unsigned int queue_num, port_num;

	u8 ip_proto, ip_frag;

	u8 num_udf;

	u32 reg;

	int ret;



	/* Check for unsupported extensions */

	if ((fs->flow_type & FLOW_EXT) &&

	    (fs->m_ext.vlan_etype || fs->m_ext.data[1]))

		return -EINVAL;



	if (fs->location != RX_CLS_LOC_ANY &&

	    test_bit(fs->location, priv->cfp.used))

		return -EBUSY;



	if (fs->location != RX_CLS_LOC_ANY &&

	    fs->location > bcm_sf2_cfp_rule_size(priv))

		return -EINVAL;



	ip_frag = be32_to_cpu(fs->m_ext.data[0]);



	/* We do not support discarding packets, check that the

	 * destination port is enabled and that we are within the

	 * number of ports supported by the switch

	 */

	port_num = fs->ring_cookie / 8;



	if (fs->ring_cookie == RX_CLS_FLOW_DISC ||

	    !(BIT(port_num) & ds->enabled_port_mask) ||

	    port_num >= priv->hw_params.num_ports)

		return -EINVAL;



	switch (fs->flow_type & ~FLOW_EXT) {

	case TCP_V4_FLOW:

		ip_proto = IPPROTO_TCP;

		v4_spec = &fs->h_u.tcp_ip4_spec;

		break;

	case UDP_V4_FLOW:

		ip_proto = IPPROTO_UDP;

		v4_spec = &fs->h_u.udp_ip4_spec;

		break;

	default:

		return -EINVAL;

	}



	/* We only use one UDF slice for now */

	slice_num = 1;

	layout = &udf_tcpip4_layout;

	num_udf = bcm_sf2_get_num_udf_slices(layout->slices);



	/* Apply the UDF layout for this filter */

	bcm_sf2_cfp_udf_set(priv, slice_num, layout->slices);



	/* Apply to all packets received through this port */

	core_writel(priv, BIT(port), CORE_CFP_DATA_PORT(7));



	/* S-Tag status		[31:30]

	 * C-Tag status		[29:28]

	 * L2 framing		[27:26]

	 * L3 framing		[25:24]

	 * IP ToS		[23:16]

	 * IP proto		[15:08]

	 * IP Fragm		[7]

	 * Non 1st frag		[6]

	 * IP Authen		[5]

	 * TTL range		[4:3]

	 * PPPoE session	[2]

	 * Reserved		[1]

	 * UDF_Valid[8]		[0]

	 */

	core_writel(priv, v4_spec->tos << 16 | ip_proto << 8 | ip_frag << 7,

		    CORE_CFP_DATA_PORT(6));



	/* UDF_Valid[7:0]	[31:24]

	 * S-Tag		[23:8]

	 * C-Tag		[7:0]

	 */

	core_writel(priv, GENMASK(num_udf - 1, 0) << 24, CORE_CFP_DATA_PORT(5));



	/* C-Tag		[31:24]

	 * UDF_n_A8		[23:8]

	 * UDF_n_A7		[7:0]

	 */

	core_writel(priv, 0, CORE_CFP_DATA_PORT(4));



	/* UDF_n_A7		[31:24]

	 * UDF_n_A6		[23:8]

	 * UDF_n_A5		[7:0]

	 */

	core_writel(priv, be16_to_cpu(v4_spec->pdst) >> 8,

		    CORE_CFP_DATA_PORT(3));



	/* UDF_n_A5		[31:24]

	 * UDF_n_A4		[23:8]

	 * UDF_n_A3		[7:0]

	 */

	reg = (be16_to_cpu(v4_spec->pdst) & 0xff) << 24 |

	      (u32)be16_to_cpu(v4_spec->psrc) << 8 |

	      (be32_to_cpu(v4_spec->ip4dst) & 0x0000ff00) >> 8;

	core_writel(priv, reg, CORE_CFP_DATA_PORT(2));



	/* UDF_n_A3		[31:24]

	 * UDF_n_A2		[23:8]

	 * UDF_n_A1		[7:0]

	 */

	reg = (u32)(be32_to_cpu(v4_spec->ip4dst) & 0xff) << 24 |

	      (u32)(be32_to_cpu(v4_spec->ip4dst) >> 16) << 8 |

	      (be32_to_cpu(v4_spec->ip4src) & 0x0000ff00) >> 8;

	core_writel(priv, reg, CORE_CFP_DATA_PORT(1));



	/* UDF_n_A1		[31:24]

	 * UDF_n_A0		[23:8]

	 * Reserved		[7:4]

	 * Slice ID		[3:2]

	 * Slice valid		[1:0]

	 */

	reg = (u32)(be32_to_cpu(v4_spec->ip4src) & 0xff) << 24 |

	      (u32)(be32_to_cpu(v4_spec->ip4src) >> 16) << 8 |

	      SLICE_NUM(slice_num) | SLICE_VALID;

	core_writel(priv, reg, CORE_CFP_DATA_PORT(0));



	/* Source port map match */

	core_writel(priv, 0xff, CORE_CFP_MASK_PORT(7));



	/* Mask with the specific layout for IPv4 packets */

	core_writel(priv, layout->mask_value, CORE_CFP_MASK_PORT(6));



	/* Mask all but valid UDFs */

	core_writel(priv, GENMASK(num_udf - 1, 0) << 24, CORE_CFP_MASK_PORT(5));



	/* Mask all */

	core_writel(priv, 0, CORE_CFP_MASK_PORT(4));



	/* All other UDFs should be matched with the filter */

	core_writel(priv, 0xff, CORE_CFP_MASK_PORT(3));

	core_writel(priv, 0xffffffff, CORE_CFP_MASK_PORT(2));

	core_writel(priv, 0xffffffff, CORE_CFP_MASK_PORT(1));

	core_writel(priv, 0xffffff0f, CORE_CFP_MASK_PORT(0));



	/* Locate the first rule available */

	if (fs->location == RX_CLS_LOC_ANY)

		rule_index = find_first_zero_bit(priv->cfp.used,

						 bcm_sf2_cfp_rule_size(priv));

	else

		rule_index = fs->location;



	/* Insert into TCAM now */

	bcm_sf2_cfp_rule_addr_set(priv, rule_index);



	ret = bcm_sf2_cfp_op(priv, OP_SEL_WRITE | TCAM_SEL);

	if (ret) {

		pr_err("TCAM entry at addr %d failed\n", rule_index);

		return ret;

	}



	/* Replace ARL derived destination with DST_MAP derived, define

	 * which port and queue this should be forwarded to.

	 *

	 * We have a small oddity where Port 6 just does not have a

	 * valid bit here (so we subtract by one).

	 */

	queue_num = fs->ring_cookie % 8;

	if (port_num >= 7)

		port_num -= 1;



	reg = CHANGE_FWRD_MAP_IB_REP_ARL | BIT(port_num + DST_MAP_IB_SHIFT) |

		CHANGE_TC | queue_num << NEW_TC_SHIFT;



	core_writel(priv, reg, CORE_ACT_POL_DATA0);



	/* Set classification ID that needs to be put in Broadcom tag */

	core_writel(priv, rule_index << CHAIN_ID_SHIFT,

		    CORE_ACT_POL_DATA1);



	core_writel(priv, 0, CORE_ACT_POL_DATA2);



	/* Configure policer RAM now */

	ret = bcm_sf2_cfp_op(priv, OP_SEL_WRITE | ACT_POL_RAM);

	if (ret) {

		pr_err("Policer entry at %d failed\n", rule_index);

		return ret;

	}



	/* Disable the policer */

	core_writel(priv, POLICER_MODE_DISABLE, CORE_RATE_METER0);



	/* Now the rate meter */

	ret = bcm_sf2_cfp_op(priv, OP_SEL_WRITE | RATE_METER_RAM);

	if (ret) {

		pr_err("Meter entry at %d failed\n", rule_index);

		return ret;

	}



	/* Turn on CFP for this rule now */

	reg = core_readl(priv, CORE_CFP_CTL_REG);

	reg |= BIT(port);

	core_writel(priv, reg, CORE_CFP_CTL_REG);



	/* Flag the rule as being used and return it */

	set_bit(rule_index, priv->cfp.used);

	fs->location = rule_index;



	return 0;

}



static int bcm_sf2_cfp_rule_del(struct bcm_sf2_priv *priv, int port,

				u32 loc)

{

	int ret;

	u32 reg;



	/* Refuse deletion of unused rules, and the default reserved rule */

	if (!test_bit(loc, priv->cfp.used) || loc == 0)

		return -EINVAL;



	/* Indicate which rule we want to read */

	bcm_sf2_cfp_rule_addr_set(priv, loc);



	ret =  bcm_sf2_cfp_op(priv, OP_SEL_READ | TCAM_SEL);

	if (ret)

		return ret;



	/* Clear its valid bits */

	reg = core_readl(priv, CORE_CFP_DATA_PORT(0));

	reg &= ~SLICE_VALID;

	core_writel(priv, reg, CORE_CFP_DATA_PORT(0));



	/* Write back this entry into the TCAM now */

	ret = bcm_sf2_cfp_op(priv, OP_SEL_WRITE | TCAM_SEL);

	if (ret)

		return ret;



	clear_bit(loc, priv->cfp.used);



	return 0;

}



static void bcm_sf2_invert_masks(struct ethtool_rx_flow_spec *flow)

{

	unsigned int i;



	for (i = 0; i < sizeof(flow->m_u); i++)

		flow->m_u.hdata[i] ^= 0xff;



	flow->m_ext.vlan_etype ^= cpu_to_be16(~0);

	flow->m_ext.vlan_tci ^= cpu_to_be16(~0);

	flow->m_ext.data[0] ^= cpu_to_be32(~0);

	flow->m_ext.data[1] ^= cpu_to_be32(~0);

}



static int bcm_sf2_cfp_rule_get(struct bcm_sf2_priv *priv, int port,

				struct ethtool_rxnfc *nfc, bool search)

{

	struct ethtool_tcpip4_spec *v4_spec;

	unsigned int queue_num;

	u16 src_dst_port;

	u32 reg, ipv4;

	int ret;



	if (!search) {

		bcm_sf2_cfp_rule_addr_set(priv, nfc->fs.location);



		ret = bcm_sf2_cfp_op(priv, OP_SEL_READ | ACT_POL_RAM);

		if (ret)

			return ret;



		reg = core_readl(priv, CORE_ACT_POL_DATA0);



		ret = bcm_sf2_cfp_op(priv, OP_SEL_READ | TCAM_SEL);

		if (ret)

			return ret;

	} else {

		reg = core_readl(priv, CORE_ACT_POL_DATA0);

	}



	/* Extract the destination port */

	nfc->fs.ring_cookie = fls((reg >> DST_MAP_IB_SHIFT) &

				  DST_MAP_IB_MASK) - 1;



	/* There is no Port 6, so we compensate for that here */

	if (nfc->fs.ring_cookie >= 6)

		nfc->fs.ring_cookie++;

	nfc->fs.ring_cookie *= 8;



	/* Extract the destination queue */

	queue_num = (reg >> NEW_TC_SHIFT) & NEW_TC_MASK;

	nfc->fs.ring_cookie += queue_num;



	/* Extract the IP protocol */

	reg = core_readl(priv, CORE_CFP_DATA_PORT(6));

	switch ((reg & IPPROTO_MASK) >> IPPROTO_SHIFT) {

	case IPPROTO_TCP:

		nfc->fs.flow_type = TCP_V4_FLOW;

		v4_spec = &nfc->fs.h_u.tcp_ip4_spec;

		break;

	case IPPROTO_UDP:

		nfc->fs.flow_type = UDP_V4_FLOW;

		v4_spec = &nfc->fs.h_u.udp_ip4_spec;

		break;

	default:

		/* Clear to exit the search process */

		if (search)

			core_readl(priv, CORE_CFP_DATA_PORT(7));

		return -EINVAL;

	}



	v4_spec->tos = (reg >> 16) & IPPROTO_MASK;

	nfc->fs.m_ext.data[0] = cpu_to_be32((reg >> 7) & 1);



	reg = core_readl(priv, CORE_CFP_DATA_PORT(3));

	/* src port [15:8] */

	src_dst_port = reg << 8;



	reg = core_readl(priv, CORE_CFP_DATA_PORT(2));

	/* src port [7:0] */

	src_dst_port |= (reg >> 24);



	v4_spec->pdst = cpu_to_be16(src_dst_port);

	nfc->fs.m_u.tcp_ip4_spec.pdst = cpu_to_be16(~0);

	v4_spec->psrc = cpu_to_be16((u16)(reg >> 8));

	nfc->fs.m_u.tcp_ip4_spec.psrc = cpu_to_be16(~0);



	/* IPv4 dst [15:8] */

	ipv4 = (u16)(reg & 0xff) << 8;

	reg = core_readl(priv, CORE_CFP_DATA_PORT(1));

	/* IPv4 dst [31:16] */

	ipv4 |= (u32)((reg >> 8) & 0xffffff) << 16;

	/* IPv4 dst [7:0] */

	ipv4 |= (reg >> 24) & 0xff;

	v4_spec->ip4dst = cpu_to_be32(ipv4);

	nfc->fs.m_u.tcp_ip4_spec.ip4dst = cpu_to_be32(~0);



	/* IPv4 src [15:8] */

	ipv4 = (u16)(reg & 0xff) << 8;

	reg = core_readl(priv, CORE_CFP_DATA_PORT(0));



	if (!(reg & SLICE_VALID))

		return -EINVAL;



	/* IPv4 src [7:0] */

	ipv4 |= (reg >> 24) & 0xff;

	/* IPv4 src [31:16] */

	ipv4 |= ((reg >> 8) & 0xffffff) << 16;

	v4_spec->ip4src = cpu_to_be32(ipv4);

	nfc->fs.m_u.tcp_ip4_spec.ip4src = cpu_to_be32(~0);



	/* Read last to avoid next entry clobbering the results during search

	 * operations

	 */

	reg = core_readl(priv, CORE_CFP_DATA_PORT(7));

	if (!(reg & 1 << port))

		return -EINVAL;



	bcm_sf2_invert_masks(&nfc->fs);



	/* Put the TCAM size here */

	nfc->data = bcm_sf2_cfp_rule_size(priv);



	return 0;

}



/* We implement the search doing a TCAM search operation */

static int bcm_sf2_cfp_rule_get_all(struct bcm_sf2_priv *priv,

				    int port, struct ethtool_rxnfc *nfc,

				    u32 *rule_locs)

{

	unsigned int index = 1, rules_cnt = 0;

	int ret;

	u32 reg;



	/* Do not poll on OP_STR_DONE to be self-clearing for search

	 * operations, we cannot use bcm_sf2_cfp_op here because it completes

	 * on clearing OP_STR_DONE which won't clear until the entire search

	 * operation is over.

	 */

	reg = core_readl(priv, CORE_CFP_ACC);

	reg &= ~(XCESS_ADDR_MASK << XCESS_ADDR_SHIFT);

	reg |= index << XCESS_ADDR_SHIFT;

	reg &= ~(OP_SEL_MASK | RAM_SEL_MASK);

	reg |= OP_SEL_SEARCH | TCAM_SEL | OP_STR_DONE;

	core_writel(priv, reg, CORE_CFP_ACC);



	do {

		/* Wait for results to be ready */

		reg = core_readl(priv, CORE_CFP_ACC);



		/* Extract the address we are searching */

		index = reg >> XCESS_ADDR_SHIFT;

		index &= XCESS_ADDR_MASK;



		/* We have a valid search result, so flag it accordingly */

		if (reg & SEARCH_STS) {

			ret = bcm_sf2_cfp_rule_get(priv, port, nfc, true);

			if (ret)

				continue;



			rule_locs[rules_cnt] = index;

			rules_cnt++;

		}



		/* Search is over break out */

		if (!(reg & OP_STR_DONE))

			break;



	} while (index < CFP_NUM_RULES);



	/* Put the TCAM size here */

	nfc->data = bcm_sf2_cfp_rule_size(priv);

	nfc->rule_cnt = rules_cnt;



	return 0;

}



int bcm_sf2_get_rxnfc(struct dsa_switch *ds, int port,

		      struct ethtool_rxnfc *nfc, u32 *rule_locs)

{

	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);

	int ret = 0;



	mutex_lock(&priv->cfp.lock);



	switch (nfc->cmd) {

	case ETHTOOL_GRXCLSRLCNT:

		/* Subtract the default, unusable rule */

		nfc->rule_cnt = bitmap_weight(priv->cfp.used,

					      CFP_NUM_RULES) - 1;

		/* We support specifying rule locations */

		nfc->data |= RX_CLS_LOC_SPECIAL;

		break;

	case ETHTOOL_GRXCLSRULE:

		ret = bcm_sf2_cfp_rule_get(priv, port, nfc, false);

		break;

	case ETHTOOL_GRXCLSRLALL:

		ret = bcm_sf2_cfp_rule_get_all(priv, port, nfc, rule_locs);

		break;

	default:

		ret = -EOPNOTSUPP;

		break;

	}



	mutex_unlock(&priv->cfp.lock);



	return ret;

}



int bcm_sf2_set_rxnfc(struct dsa_switch *ds, int port,

		      struct ethtool_rxnfc *nfc)

{

	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);

	int ret = 0;



	mutex_lock(&priv->cfp.lock);



	switch (nfc->cmd) {

	case ETHTOOL_SRXCLSRLINS:

		ret = bcm_sf2_cfp_rule_set(ds, port, &nfc->fs);

		break;



	case ETHTOOL_SRXCLSRLDEL:

		ret = bcm_sf2_cfp_rule_del(priv, port, nfc->fs.location);

		break;

	default:

		ret = -EOPNOTSUPP;

		break;

	}



	mutex_unlock(&priv->cfp.lock);



	return ret;

}



int bcm_sf2_cfp_rst(struct bcm_sf2_priv *priv)

{

	unsigned int timeout = 1000;

	u32 reg;



	reg = core_readl(priv, CORE_CFP_ACC);

	reg |= TCAM_RESET;

	core_writel(priv, reg, CORE_CFP_ACC);



	do {

		reg = core_readl(priv, CORE_CFP_ACC);

		if (!(reg & TCAM_RESET))

			break;



		cpu_relax();

	} while (timeout--);



	if (!timeout)

		return -ETIMEDOUT;



	return 0;

}