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Commit 08f4b591 authored by Or Gerlitz's avatar Or Gerlitz Committed by David S. Miller
Browse files

net/devlink: Add E-Switch mode control 



Add the commands to set and show the mode of SRIOV E-Switch, two modes
are supported:

* legacy: operating in the "old" L2 based mode (DMAC --> VF vport)

* switchdev: the E-Switch is referred to as whitebox switch configured
using standard tools such as tc, bridge, openvswitch etc. To allow
working with the tools, for each VF, a VF representor netdevice is
created by the E-Switch manager vendor device driver instance (e.g PF).

Signed-off-by: default avatarOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent fed9ce22

include/net/devlink.h

+3 −0
Original line number Diff line number Diff line
@@ -90,6 +90,9 @@ struct devlink_ops { 
				       u16 tc_index,

				       enum devlink_sb_pool_type pool_type,

				       u32 *p_cur, u32 *p_max);



	int (*eswitch_mode_get)(struct devlink *devlink, u16 *p_mode);

	int (*eswitch_mode_set)(struct devlink *devlink, u16 mode);

};



static inline void *devlink_priv(struct devlink *devlink)

include/uapi/linux/devlink.h

+8 −0
Original line number Diff line number Diff line
@@ -57,6 +57,8 @@ enum devlink_command { 
	DEVLINK_CMD_SB_OCC_SNAPSHOT,

	DEVLINK_CMD_SB_OCC_MAX_CLEAR,



	DEVLINK_CMD_ESWITCH_MODE_GET,

	DEVLINK_CMD_ESWITCH_MODE_SET,

	/* add new commands above here */



	__DEVLINK_CMD_MAX,
@@ -95,6 +97,11 @@ enum devlink_sb_threshold_type { 


#define DEVLINK_SB_THRESHOLD_TO_ALPHA_MAX 20



enum devlink_eswitch_mode {

	DEVLINK_ESWITCH_MODE_LEGACY,

	DEVLINK_ESWITCH_MODE_SWITCHDEV,

};



enum devlink_attr {

	/* don't change the order or add anything between, this is ABI! */

	DEVLINK_ATTR_UNSPEC,
@@ -125,6 +132,7 @@ enum devlink_attr { 
	DEVLINK_ATTR_SB_TC_INDEX,		/* u16 */

	DEVLINK_ATTR_SB_OCC_CUR,		/* u32 */

	DEVLINK_ATTR_SB_OCC_MAX,		/* u32 */

	DEVLINK_ATTR_ESWITCH_MODE,		/* u16 */



	/* add new attributes above here, update the policy in devlink.c */

net/core/devlink.c

+87 −0
Original line number Diff line number Diff line
@@ -1394,6 +1394,78 @@ static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb, 
	return -EOPNOTSUPP;

}



static int devlink_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,

				enum devlink_command cmd, u32 portid,

				u32 seq, int flags, u16 mode)

{

	void *hdr;



	hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);

	if (!hdr)

		return -EMSGSIZE;



	if (devlink_nl_put_handle(msg, devlink))

		goto nla_put_failure;



	if (nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode))

		goto nla_put_failure;



	genlmsg_end(msg, hdr);

	return 0;



nla_put_failure:

	genlmsg_cancel(msg, hdr);

	return -EMSGSIZE;

}



static int devlink_nl_cmd_eswitch_mode_get_doit(struct sk_buff *skb,

						struct genl_info *info)

{

	struct devlink *devlink = info->user_ptr[0];

	const struct devlink_ops *ops = devlink->ops;

	struct sk_buff *msg;

	u16 mode;

	int err;



	if (!ops || !ops->eswitch_mode_get)

		return -EOPNOTSUPP;



	err = ops->eswitch_mode_get(devlink, &mode);

	if (err)

		return err;



	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);

	if (!msg)

		return -ENOMEM;



	err = devlink_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_MODE_GET,

				   info->snd_portid, info->snd_seq, 0, mode);



	if (err) {

		nlmsg_free(msg);

		return err;

	}



	return genlmsg_reply(msg, info);

}



static int devlink_nl_cmd_eswitch_mode_set_doit(struct sk_buff *skb,

						struct genl_info *info)

{

	struct devlink *devlink = info->user_ptr[0];

	const struct devlink_ops *ops = devlink->ops;

	u16 mode;



	if (!info->attrs[DEVLINK_ATTR_ESWITCH_MODE])

		return -EINVAL;



	mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);



	if (ops && ops->eswitch_mode_set)

		return ops->eswitch_mode_set(devlink, mode);

	return -EOPNOTSUPP;

}



static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {

	[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },

	[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
@@ -1407,6 +1479,7 @@ static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = { 
	[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },

	[DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },

	[DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },

	[DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },

};



static const struct genl_ops devlink_nl_ops[] = {
@@ -1525,6 +1598,20 @@ static const struct genl_ops devlink_nl_ops[] = { 
				  DEVLINK_NL_FLAG_NEED_SB |

				  DEVLINK_NL_FLAG_LOCK_PORTS,

	},

	{

		.cmd = DEVLINK_CMD_ESWITCH_MODE_GET,

		.doit = devlink_nl_cmd_eswitch_mode_get_doit,

		.policy = devlink_nl_policy,

		.flags = GENL_ADMIN_PERM,

		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,

	},

	{

		.cmd = DEVLINK_CMD_ESWITCH_MODE_SET,

		.doit = devlink_nl_cmd_eswitch_mode_set_doit,

		.policy = devlink_nl_policy,

		.flags = GENL_ADMIN_PERM,

		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,

	},

};



/**