Re: [RFC Patch net-next v2 09/15] net: dsa: microchip: update fdb add/del/dump in ksz_common

[<Arun.Ramadoss@microchip.com>]

On Mon, 2022-06-13 at 12:42 +0300, Vladimir Oltean wrote:
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> On Mon, May 30, 2022 at 04:12:51PM +0530, Arun Ramadoss wrote:
> > This patch makes the dsa_switch_hook for fdbs to use ksz_common.c
> > file.
> > And from ksz_common, individual switches fdb functions are called
> > using
> > the dev->dev_ops.
> > 
> > Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
> > ---
> 
> I had to jump ahead and look at the other patches to see if you plan
> on
> doing anything about the r_dyn_mac_table, r_sta_mac_table,
> w_sta_mac_table
> dev_ops which are only implemented for ksz8. They become redundant
> when
> you introduce new dev_ops for the entire FDB dump, add, del
> procedure.
> 
> I see those aren't touched - what's the plan there?

Yes, static & dynamic table access becomes reduntant and used only for
ksz8. I will remove it from the ksz_dev_ops structure. 

> > 
> > -static int ksz9477_port_fdb_dump(struct dsa_switch *ds, int port,
> > -                              dsa_fdb_dump_cb_t *cb, void *data)
> > +static int ksz9477_fdb_dump(struct ksz_device *dev, int port,
> > +                         dsa_fdb_dump_cb_t *cb, void *data)
> >  {
> > -     struct ksz_device *dev = ds->priv;
> >       int ret = 0;
> >       u32 ksz_data;
> >       u32 alu_table[4];
> > @@ -1315,9 +1312,9 @@ static const struct dsa_switch_ops
> > ksz9477_switch_ops = {
> >       .port_vlan_filtering    = ksz_port_vlan_filtering,
> >       .port_vlan_add          = ksz_port_vlan_add,
> >       .port_vlan_del          = ksz_port_vlan_del,
> > -     .port_fdb_dump          = ksz9477_port_fdb_dump,
> > -     .port_fdb_add           = ksz9477_port_fdb_add,
> > -     .port_fdb_del           = ksz9477_port_fdb_del,
> > +     .port_fdb_dump          = ksz_port_fdb_dump,
> > +     .port_fdb_add           = ksz_port_fdb_add,
> > +     .port_fdb_del           = ksz_port_fdb_del,
> >       .port_mdb_add           = ksz_port_mdb_add,
> >       .port_mdb_del           = ksz_port_mdb_del,
> >       .port_mirror_add        = ksz_port_mirror_add,
> > @@ -1403,6 +1400,9 @@ static const struct ksz_dev_ops
> > ksz9477_dev_ops = {
> >       .mirror_del = ksz9477_port_mirror_del,
> >       .get_stp_reg = ksz9477_get_stp_reg,
> >       .get_caps = ksz9477_get_caps,
> > +     .fdb_dump = ksz9477_fdb_dump,
> > +     .fdb_add = ksz9477_fdb_add,
> > +     .fdb_del = ksz9477_fdb_del,
> >       .mdb_add = ksz9477_mdb_add,
> >       .mdb_del = ksz9477_mdb_del,
> >       .shutdown = ksz9477_reset_switch,
> > diff --git a/drivers/net/dsa/microchip/ksz_common.c
> > b/drivers/net/dsa/microchip/ksz_common.c
> > index b9082952db0f..8f79ff1ac648 100644
> > --- a/drivers/net/dsa/microchip/ksz_common.c
> > +++ b/drivers/net/dsa/microchip/ksz_common.c
> > @@ -765,32 +765,40 @@ void ksz_port_fast_age(struct dsa_switch *ds,
> > int port)
> >  }
> >  EXPORT_SYMBOL_GPL(ksz_port_fast_age);
> > 
> > 
> >  int ksz_port_fdb_dump(struct dsa_switch *ds, int port,
> > dsa_fdb_dump_cb_t *cb,
> >                     void *data)
> >  {
> >       struct ksz_device *dev = ds->priv;
> > -     int ret = 0;
> > -     u16 i = 0;
> > -     u16 entries = 0;
> > -     u8 timestamp = 0;
> > -     u8 fid;
> > -     u8 member;
> > -     struct alu_struct alu;
> > -
> > -     do {
> > -             alu.is_static = false;
> > -             ret = dev->dev_ops->r_dyn_mac_table(dev, i, alu.mac,
> > &fid,
> > -                                                 &member,
> > &timestamp,
> > -                                                 &entries);
> > -             if (!ret && (member & BIT(port))) {
> > -                     ret = cb(alu.mac, alu.fid, alu.is_static,
> > data);
> > -                     if (ret)
> > -                             break;
> > -             }
> > -             i++;
> > -     } while (i < entries);
> > -     if (i >= entries)
> > -             ret = 0;
> > +     int ret = -EOPNOTSUPP;
> > +
> > +     if (dev->dev_ops->fdb_dump)
> > +             ret = dev->dev_ops->fdb_dump(dev, port, cb, data);
> > 
> >       return ret;
> >  }
> > diff --git a/drivers/net/dsa/microchip/ksz_common.h
> > b/drivers/net/dsa/microchip/ksz_common.h
> > index 816581dd7f8e..133b1a257868 100644
> > --- a/drivers/net/dsa/microchip/ksz_common.h
> > +++ b/drivers/net/dsa/microchip/ksz_common.h
> > @@ -192,6 +192,12 @@ struct ksz_dev_ops {
> >                         bool ingress, struct netlink_ext_ack
> > *extack);
> >       void (*mirror_del)(struct ksz_device *dev, int port,
> >                          struct dsa_mall_mirror_tc_entry *mirror);
> > +     int (*fdb_add)(struct ksz_device *dev, int port,
> > +                    const unsigned char *addr, u16 vid, struct
> > dsa_db db);
> > +     int (*fdb_del)(struct ksz_device *dev, int port,
> > +                    const unsigned char *addr, u16 vid, struct
> > dsa_db db);
> > +     int (*fdb_dump)(struct ksz_device *dev, int port,
> > +                     dsa_fdb_dump_cb_t *cb, void *data);
> >       int (*mdb_add)(struct ksz_device *dev, int port,
> >                      const struct switchdev_obj_port_mdb *mdb,
> >                      struct dsa_db db);
> > @@ -239,6 +245,10 @@ void ksz_port_bridge_leave(struct dsa_switch
> > *ds, int port,
> >                          struct dsa_bridge bridge);
> >  void ksz_port_stp_state_set(struct dsa_switch *ds, int port, u8
> > state);
> >  void ksz_port_fast_age(struct dsa_switch *ds, int port);
> > +int ksz_port_fdb_add(struct dsa_switch *ds, int port,
> > +                  const unsigned char *addr, u16 vid, struct
> > dsa_db db);
> > +int ksz_port_fdb_del(struct dsa_switch *ds, int port,
> > +                  const unsigned char *addr, u16 vid, struct
> > dsa_db db);
> >  int ksz_port_fdb_dump(struct dsa_switch *ds, int port,
> > dsa_fdb_dump_cb_t *cb,
> >                     void *data);
> >  int ksz_port_mdb_add(struct dsa_switch *ds, int port,
> > --
> > 2.36.1
> >