Re: [PATCH net-next v4 7/8] net: dsa: add MRP support

From: Vladimir Oltean
Date: Wed Feb 17 2021 - 06:28:40 EST

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In reply to: Horatiu Vultur: "[PATCH net-next v4 7/8] net: dsa: add MRP support"
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On Tue, Feb 16, 2021 at 10:42:04PM +0100, Horatiu Vultur wrote:
> Add support for offloading MRP in HW. Currently implement the switchdev
> calls 'SWITCHDEV_OBJ_ID_MRP', 'SWITCHDEV_OBJ_ID_RING_ROLE_MRP',
> to allow to create MRP instances and to set the role of these instances.
>
> Add DSA_NOTIFIER_MRP_ADD/DEL and DSA_NOTIFIER_MRP_ADD/DEL_RING_ROLE
> which calls to .port_mrp_add/del and .port_mrp_add/del_ring_role in the
> DSA driver for the switch.
>
> Signed-off-by: Horatiu Vultur <horatiu.vultur@xxxxxxxxxxxxx>
> ---
> include/net/dsa.h | 12 ++++++
> net/dsa/dsa_priv.h | 26 +++++++++++
> net/dsa/port.c | 48 +++++++++++++++++++++
> net/dsa/slave.c | 22 ++++++++++
> net/dsa/switch.c | 105 +++++++++++++++++++++++++++++++++++++++++++++
> 5 files changed, 213 insertions(+)
>
> diff --git a/include/net/dsa.h b/include/net/dsa.h
> index 68f8159564a3..83a933e563fe 100644
> --- a/include/net/dsa.h
> +++ b/include/net/dsa.h
> @@ -792,6 +792,18 @@ struct dsa_switch_ops {
> struct net_device *hsr);
> int (*port_hsr_leave)(struct dsa_switch *ds, int port,
> struct net_device *hsr);
> +
> + /*
> + * MRP integration
> + */
> + int (*port_mrp_add)(struct dsa_switch *ds, int port,
> + const struct switchdev_obj_mrp *mrp);
> + int (*port_mrp_del)(struct dsa_switch *ds, int port,
> + const struct switchdev_obj_mrp *mrp);
> + int (*port_mrp_add_ring_role)(struct dsa_switch *ds, int port,
> + const struct switchdev_obj_ring_role_mrp *mrp);
> + int (*port_mrp_del_ring_role)(struct dsa_switch *ds, int port,
> + const struct switchdev_obj_ring_role_mrp *mrp);
> };
>
> #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \
> diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
> index e9d1e76c42ba..2eeaa42f2e08 100644
> --- a/net/dsa/dsa_priv.h
> +++ b/net/dsa/dsa_priv.h
> @@ -31,6 +31,10 @@ enum {
> DSA_NOTIFIER_VLAN_DEL,
> DSA_NOTIFIER_MTU,
> DSA_NOTIFIER_TAG_PROTO,
> + DSA_NOTIFIER_MRP_ADD,
> + DSA_NOTIFIER_MRP_DEL,
> + DSA_NOTIFIER_MRP_ADD_RING_ROLE,
> + DSA_NOTIFIER_MRP_DEL_RING_ROLE,
> };
>
> /* DSA_NOTIFIER_AGEING_TIME */
> @@ -91,6 +95,20 @@ struct dsa_notifier_tag_proto_info {
> const struct dsa_device_ops *tag_ops;
> };
>
> +/* DSA_NOTIFIER_MRP_* */
> +struct dsa_notifier_mrp_info {
> + const struct switchdev_obj_mrp *mrp;
> + int sw_index;
> + int port;
> +};
> +
> +/* DSA_NOTIFIER_MRP_* */
> +struct dsa_notifier_mrp_ring_role_info {
> + const struct switchdev_obj_ring_role_mrp *mrp;
> + int sw_index;
> + int port;
> +};
> +
> struct dsa_switchdev_event_work {
> struct dsa_switch *ds;
> int port;
> @@ -198,6 +216,14 @@ int dsa_port_vlan_add(struct dsa_port *dp,
> struct netlink_ext_ack *extack);
> int dsa_port_vlan_del(struct dsa_port *dp,
> const struct switchdev_obj_port_vlan *vlan);
> +int dsa_port_mrp_add(const struct dsa_port *dp,
> + const struct switchdev_obj_mrp *mrp);
> +int dsa_port_mrp_del(const struct dsa_port *dp,
> + const struct switchdev_obj_mrp *mrp);
> +int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
> + const struct switchdev_obj_ring_role_mrp *mrp);
> +int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
> + const struct switchdev_obj_ring_role_mrp *mrp);
> int dsa_port_link_register_of(struct dsa_port *dp);
> void dsa_port_link_unregister_of(struct dsa_port *dp);
> int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr);
> diff --git a/net/dsa/port.c b/net/dsa/port.c
> index 14a1d0d77657..c9c6d7ab3f47 100644
> --- a/net/dsa/port.c
> +++ b/net/dsa/port.c
> @@ -564,6 +564,54 @@ int dsa_port_vlan_del(struct dsa_port *dp,
> return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
> }
>
> +int dsa_port_mrp_add(const struct dsa_port *dp,
> + const struct switchdev_obj_mrp *mrp)
> +{
> + struct dsa_notifier_mrp_info info = {
> + .sw_index = dp->ds->index,
> + .port = dp->index,
> + .mrp = mrp,
> + };
> +
> + return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD, &info);
> +}
> +
> +int dsa_port_mrp_del(const struct dsa_port *dp,
> + const struct switchdev_obj_mrp *mrp)
> +{
> + struct dsa_notifier_mrp_info info = {
> + .sw_index = dp->ds->index,
> + .port = dp->index,
> + .mrp = mrp,
> + };
> +
> + return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL, &info);
> +}
> +
> +int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
> + const struct switchdev_obj_ring_role_mrp *mrp)
> +{
> + struct dsa_notifier_mrp_ring_role_info info = {
> + .sw_index = dp->ds->index,
> + .port = dp->index,
> + .mrp = mrp,
> + };
> +
> + return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD_RING_ROLE, &info);
> +}
> +
> +int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
> + const struct switchdev_obj_ring_role_mrp *mrp)
> +{
> + struct dsa_notifier_mrp_ring_role_info info = {
> + .sw_index = dp->ds->index,
> + .port = dp->index,
> + .mrp = mrp,
> + };
> +
> + return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL_RING_ROLE, &info);
> +}
> +
> void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
> const struct dsa_device_ops *tag_ops)
> {
> diff --git a/net/dsa/slave.c b/net/dsa/slave.c
> index 5ecb43a1b6e0..491e3761b5f4 100644
> --- a/net/dsa/slave.c
> +++ b/net/dsa/slave.c
> @@ -404,6 +404,17 @@ static int dsa_slave_port_obj_add(struct net_device *dev,
> case SWITCHDEV_OBJ_ID_PORT_VLAN:
> err = dsa_slave_vlan_add(dev, obj, extack);
> break;
> + case SWITCHDEV_OBJ_ID_MRP:
> + if (!dsa_port_offloads_netdev(dp, obj->orig_dev))
> + return -EOPNOTSUPP;
> + err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj));
> + break;
> + case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
> + if (!dsa_port_offloads_netdev(dp, obj->orig_dev))
> + return -EOPNOTSUPP;
> + err = dsa_port_mrp_add_ring_role(dp,
> + SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
> + break;
> default:
> err = -EOPNOTSUPP;
> break;
> @@ -461,6 +472,17 @@ static int dsa_slave_port_obj_del(struct net_device *dev,
> case SWITCHDEV_OBJ_ID_PORT_VLAN:
> err = dsa_slave_vlan_del(dev, obj);
> break;
> + case SWITCHDEV_OBJ_ID_MRP:
> + if (!dsa_port_offloads_netdev(dp, obj->orig_dev))
> + return -EOPNOTSUPP;
> + err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj));
> + break;
> + case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
> + if (!dsa_port_offloads_netdev(dp, obj->orig_dev))
> + return -EOPNOTSUPP;
> + err = dsa_port_mrp_del_ring_role(dp,
> + SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
> + break;
> default:
> err = -EOPNOTSUPP;
> break;
> diff --git a/net/dsa/switch.c b/net/dsa/switch.c
> index db2a9b221988..4b5da89dc27a 100644
> --- a/net/dsa/switch.c
> +++ b/net/dsa/switch.c
> @@ -372,6 +372,99 @@ static int dsa_switch_change_tag_proto(struct dsa_switch *ds,
> return 0;
> }
>
> +static bool dsa_switch_mrp_match(struct dsa_switch *ds, int port,
> + struct dsa_notifier_mrp_info *info)
> +{
> + if (ds->index == info->sw_index && port == info->port)
> + return true;
> +
> + if (dsa_is_dsa_port(ds, port))
> + return true;
> +
> + return false;
> +}
> +
> +static int dsa_switch_mrp_add(struct dsa_switch *ds,
> + struct dsa_notifier_mrp_info *info)
> +{
> + int err = 0;
> + int port;
> +
> + if (!ds->ops->port_mrp_add)
> + return -EOPNOTSUPP;
> +
> + for (port = 0; port < ds->num_ports; port++) {
> + if (dsa_switch_mrp_match(ds, port, info)) {
> + err = ds->ops->port_mrp_add(ds, port, info->mrp);
> + if (err)
> + break;
> + }
> + }
> +
> + return err;
> +}
> +
> +static int dsa_switch_mrp_del(struct dsa_switch *ds,
> + struct dsa_notifier_mrp_info *info)
> +{
> + if (!ds->ops->port_mrp_del)
> + return -EOPNOTSUPP;
> +
> + if (ds->index == info->sw_index)
> + return ds->ops->port_mrp_del(ds, info->port, info->mrp);
> +
> + return 0;
> +}
> +

Why not use dsa_switch_mrp_match here too? (question valid for the ring
role below too)

> +static bool
> +dsa_switch_mrp_ring_role_match(struct dsa_switch *ds, int port,
> + struct dsa_notifier_mrp_ring_role_info *info)
> +{
> + if (ds->index == info->sw_index && port == info->port)
> + return true;
> +
> + if (dsa_is_dsa_port(ds, port))
> + return true;
> +
> + return false;
> +}
> +
> +static int
> +dsa_switch_mrp_add_ring_role(struct dsa_switch *ds,
> + struct dsa_notifier_mrp_ring_role_info *info)
> +{
> + int err = 0;
> + int port;
> +
> + if (!ds->ops->port_mrp_add)
> + return -EOPNOTSUPP;
> +
> + for (port = 0; port < ds->num_ports; port++) {
> + if (dsa_switch_mrp_ring_role_match(ds, port, info)) {
> + err = ds->ops->port_mrp_add_ring_role(ds, port,
> + info->mrp);
> + if (err)
> + break;
> + }
> + }
> +
> + return err;
> +}
> +
> +static int
> +dsa_switch_mrp_del_ring_role(struct dsa_switch *ds,
> + struct dsa_notifier_mrp_ring_role_info *info)
> +{
> + if (!ds->ops->port_mrp_del)
> + return -EOPNOTSUPP;
> +
> + if (ds->index == info->sw_index)
> + return ds->ops->port_mrp_del_ring_role(ds, info->port,
> + info->mrp);
> +
> + return 0;
> +}
> +
> static int dsa_switch_event(struct notifier_block *nb,
> unsigned long event, void *info)
> {
> @@ -427,6 +520,18 @@ static int dsa_switch_event(struct notifier_block *nb,
> case DSA_NOTIFIER_TAG_PROTO:
> err = dsa_switch_change_tag_proto(ds, info);
> break;
> + case DSA_NOTIFIER_MRP_ADD:
> + err = dsa_switch_mrp_add(ds, info);
> + break;
> + case DSA_NOTIFIER_MRP_DEL:
> + err = dsa_switch_mrp_del(ds, info);
> + break;
> + case DSA_NOTIFIER_MRP_ADD_RING_ROLE:
> + err = dsa_switch_mrp_add_ring_role(ds, info);
> + break;
> + case DSA_NOTIFIER_MRP_DEL_RING_ROLE:
> + err = dsa_switch_mrp_del_ring_role(ds, info);
> + break;
> default:
> err = -EOPNOTSUPP;
> break;
> --
> 2.27.0
>

Next message: Robert Foss: "[PATCH v5 08/22] media: camss: Add missing format identifiers"
Previous message: Robert Foss: "[PATCH v5 04/22] media: camss: Add CAMSS_845 camss version"
In reply to: Horatiu Vultur: "[PATCH net-next v4 7/8] net: dsa: add MRP support"
Next in thread: Horatiu Vultur: "[PATCH net-next v4 8/8] net: dsa: felix: Add support for MRP"
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