Commit 06d3e196 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'lan9303-Add-basic-offloading-of-unicast-traffic' 



Egil Hjelmeland says:

====================
lan9303: Add basic offloading of unicast traffic

This series add basic offloading of unicast traffic to the lan9303
DSA driver.

Review welcome!

Changes v1 -> v2:
 - Patch 1: Codestyle linting.
 - Patch 2: Remember SWE_PORT_STATE while not bridged.
            Added constant LAN9303_SWE_PORT_MIRROR_DISABLED.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 4a269818 d99a86ae

drivers/net/dsa/lan9303-core.c

+107 −17
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include <linux/mutex.h>

#include <linux/mii.h>

#include <linux/phy.h>

#include <linux/if_bridge.h>



#include "lan9303.h"
@@ -146,6 +147,7 @@ 
# define LAN9303_SWE_PORT_STATE_FORWARDING_PORT0 (0)

# define LAN9303_SWE_PORT_STATE_LEARNING_PORT0 BIT(1)

# define LAN9303_SWE_PORT_STATE_BLOCKING_PORT0 BIT(0)

# define LAN9303_SWE_PORT_STATE_DISABLED_PORT0 (3)

#define LAN9303_SWE_PORT_MIRROR 0x1846

# define LAN9303_SWE_PORT_MIRROR_SNIFF_ALL BIT(8)

# define LAN9303_SWE_PORT_MIRROR_SNIFFER_PORT2 BIT(7)
@@ -156,7 +158,9 @@ 
# define LAN9303_SWE_PORT_MIRROR_MIRRORED_PORT0 BIT(2)

# define LAN9303_SWE_PORT_MIRROR_ENABLE_RX_MIRRORING BIT(1)

# define LAN9303_SWE_PORT_MIRROR_ENABLE_TX_MIRRORING BIT(0)

# define LAN9303_SWE_PORT_MIRROR_DISABLED 0

#define LAN9303_SWE_INGRESS_PORT_TYPE 0x1847

#define  LAN9303_SWE_INGRESS_PORT_TYPE_VLAN 3

#define LAN9303_BM_CFG 0x1c00

#define LAN9303_BM_EGRSS_PORT_TYPE 0x1c0c

# define LAN9303_BM_EGRSS_PORT_TYPE_SPECIAL_TAG_PORT2 (BIT(17) | BIT(16))
@@ -510,11 +514,30 @@ static int lan9303_enable_processing_port(struct lan9303 *chip, 
				LAN9303_MAC_TX_CFG_X_TX_ENABLE);

}



/* forward special tagged packets from port 0 to port 1 *or* port 2 */

static int lan9303_setup_tagging(struct lan9303 *chip)

{

	int ret;

	u32 val;

	/* enable defining the destination port via special VLAN tagging

	 * for port 0

	 */

	ret = lan9303_write_switch_reg(chip, LAN9303_SWE_INGRESS_PORT_TYPE,

				       LAN9303_SWE_INGRESS_PORT_TYPE_VLAN);

	if (ret)

		return ret;



	/* tag incoming packets at port 1 and 2 on their way to port 0 to be

	 * able to discover their source port

	 */

	val = LAN9303_BM_EGRSS_PORT_TYPE_SPECIAL_TAG_PORT0;

	return lan9303_write_switch_reg(chip, LAN9303_BM_EGRSS_PORT_TYPE, val);

}



/* We want a special working switch:

 * - do not forward packets between port 1 and 2

 * - forward everything from port 1 to port 0

 * - forward everything from port 2 to port 0

 * - forward special tagged packets from port 0 to port 1 *or* port 2

 */

static int lan9303_separate_ports(struct lan9303 *chip)

{
@@ -529,22 +552,6 @@ static int lan9303_separate_ports(struct lan9303 *chip) 
	if (ret)

		return ret;



	/* enable defining the destination port via special VLAN tagging

	 * for port 0

	 */

	ret = lan9303_write_switch_reg(chip, LAN9303_SWE_INGRESS_PORT_TYPE,

				       0x03);

	if (ret)

		return ret;



	/* tag incoming packets at port 1 and 2 on their way to port 0 to be

	 * able to discover their source port

	 */

	ret = lan9303_write_switch_reg(chip, LAN9303_BM_EGRSS_PORT_TYPE,

			LAN9303_BM_EGRSS_PORT_TYPE_SPECIAL_TAG_PORT0);

	if (ret)

		return ret;



	/* prevent port 1 and 2 from forwarding packets by their own */

	return lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_STATE,

				LAN9303_SWE_PORT_STATE_FORWARDING_PORT0 |
@@ -552,6 +559,16 @@ static int lan9303_separate_ports(struct lan9303 *chip) 
				LAN9303_SWE_PORT_STATE_BLOCKING_PORT2);

}



static void lan9303_bridge_ports(struct lan9303 *chip)

{

	/* ports bridged: remove mirroring */

	lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_MIRROR,

				 LAN9303_SWE_PORT_MIRROR_DISABLED);



	lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_STATE,

				 chip->swe_port_state);

}



static int lan9303_handle_reset(struct lan9303 *chip)

{

	if (!chip->reset_gpio)
@@ -644,6 +661,10 @@ static int lan9303_setup(struct dsa_switch *ds) 
		return -EINVAL;

	}



	ret = lan9303_setup_tagging(chip);

	if (ret)

		dev_err(chip->dev, "failed to setup port tagging %d\n", ret);



	ret = lan9303_separate_ports(chip);

	if (ret)

		dev_err(chip->dev, "failed to separate ports %d\n", ret);
@@ -836,6 +857,72 @@ static void lan9303_port_disable(struct dsa_switch *ds, int port, 
	}

}



static int lan9303_port_bridge_join(struct dsa_switch *ds, int port,

				    struct net_device *br)

{

	struct lan9303 *chip = ds->priv;



	dev_dbg(chip->dev, "%s(port %d)\n", __func__, port);

	if (ds->ports[1].bridge_dev ==  ds->ports[2].bridge_dev) {

		lan9303_bridge_ports(chip);

		chip->is_bridged = true;  /* unleash stp_state_set() */

	}



	return 0;

}



static void lan9303_port_bridge_leave(struct dsa_switch *ds, int port,

				      struct net_device *br)

{

	struct lan9303 *chip = ds->priv;



	dev_dbg(chip->dev, "%s(port %d)\n", __func__, port);

	if (chip->is_bridged) {

		lan9303_separate_ports(chip);

		chip->is_bridged = false;

	}

}



static void lan9303_port_stp_state_set(struct dsa_switch *ds, int port,

				       u8 state)

{

	int portmask, portstate;

	struct lan9303 *chip = ds->priv;



	dev_dbg(chip->dev, "%s(port %d, state %d)\n",

		__func__, port, state);



	switch (state) {

	case BR_STATE_DISABLED:

		portstate = LAN9303_SWE_PORT_STATE_DISABLED_PORT0;

		break;

	case BR_STATE_BLOCKING:

	case BR_STATE_LISTENING:

		portstate = LAN9303_SWE_PORT_STATE_BLOCKING_PORT0;

		break;

	case BR_STATE_LEARNING:

		portstate = LAN9303_SWE_PORT_STATE_LEARNING_PORT0;

		break;

	case BR_STATE_FORWARDING:

		portstate = LAN9303_SWE_PORT_STATE_FORWARDING_PORT0;

		break;

	default:

		portstate = LAN9303_SWE_PORT_STATE_DISABLED_PORT0;

		dev_err(chip->dev, "unknown stp state: port %d, state %d\n",

			port, state);

	}



	portmask = 0x3 << (port * 2);

	portstate <<= (port * 2);



	chip->swe_port_state = (chip->swe_port_state & ~portmask) | portstate;



	if (chip->is_bridged)

		lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_STATE,

					 chip->swe_port_state);

	/* else: touching SWE_PORT_STATE would break port separation */

}



static const struct dsa_switch_ops lan9303_switch_ops = {

	.get_tag_protocol = lan9303_get_tag_protocol,

	.setup = lan9303_setup,
@@ -847,6 +934,9 @@ static const struct dsa_switch_ops lan9303_switch_ops = { 
	.get_sset_count = lan9303_get_sset_count,

	.port_enable = lan9303_port_enable,

	.port_disable = lan9303_port_disable,

	.port_bridge_join       = lan9303_port_bridge_join,

	.port_bridge_leave      = lan9303_port_bridge_leave,

	.port_stp_state_set     = lan9303_port_stp_state_set,

};



static int lan9303_register_switch(struct lan9303 *chip)

drivers/net/dsa/lan9303.h

+2 −0
Original line number Diff line number Diff line
@@ -21,6 +21,8 @@ struct lan9303 { 
	struct dsa_switch *ds;

	struct mutex indirect_mutex; /* protect indexed register access */

	const struct lan9303_phy_ops *ops;

	bool is_bridged; /* true if port 1 and 2 are bridged */

	u32 swe_port_state; /* remember SWE_PORT_STATE while not bridged */

};



extern const struct regmap_access_table lan9303_register_set;

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