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Date: Fri, 02 Dec 2016 16:02:48 -0500
From: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
To: Andrew Lunn <andrew@...n.ch>, David Miller <davem@...emloft.net>
Cc: netdev <netdev@...r.kernel.org>, Andrew Lunn <andrew@...n.ch>
Subject: Re: [PATCHv2 net-next 4/4] net: dsa: mv88e6xxx: Refactor CPU and DSA port setup
Hi Andrew,
Andrew Lunn <andrew@...n.ch> writes:
> +static int mv88e6xxx_setup_port_dsa(struct mv88e6xxx_chip *chip, int port,
> + int upstream_port)
> +{
> + int err;
> +
> + err = chip->info->ops->port_set_frame_mode(
> + chip, port, MV88E6XXX_FRAME_MODE_DSA);
> + if (err)
> + return err;
> +
> + err = chip->info->ops->port_set_egress_unknowns(
> + chip, port, port == upstream_port);
> + if (err)
> + return err;
> +
> + if (chip->info->ops->port_set_ether_type)
> + return chip->info->ops->port_set_ether_type(
> + chip, port, ETH_P_EDSA);
> +
> + return 0;
> +}
> +
> +static int mv88e6xxx_setup_port_cpu(struct mv88e6xxx_chip *chip, int port)
> +{
> + int err;
> +
> + switch (chip->info->tag_protocol) {
> + case DSA_TAG_PROTO_EDSA:
> + err = chip->info->ops->port_set_frame_mode(
> + chip, port, MV88E6XXX_FRAME_MODE_ETHERTYPE);
> + if (err)
> + return err;
> +
> + err = mv88e6xxx_port_set_egress_mode(
> + chip, port, PORT_CONTROL_EGRESS_ADD_TAG);
> + if (err)
> + return err;
> +
> + if (chip->info->ops->port_set_ether_type)
> + err = chip->info->ops->port_set_ether_type(
> + chip, port, ETH_P_EDSA);
> + break;
> +
> + case DSA_TAG_PROTO_DSA:
> + err = chip->info->ops->port_set_frame_mode(
> + chip, port, MV88E6XXX_FRAME_MODE_DSA);
> + if (err)
> + return err;
> +
> + err = mv88e6xxx_port_set_egress_mode(
> + chip, port, PORT_CONTROL_EGRESS_UNMODIFIED);
> + break;
> + default:
> + err = -EINVAL;
> + }
> +
> + if (err)
> + return err;
> +
> + return chip->info->ops->port_set_egress_unknowns(chip, port, true);
> +}
> +
> +static int mv88e6xxx_setup_port_normal(struct mv88e6xxx_chip *chip, int port)
> +{
> + int err;
> +
> + err = chip->info->ops->port_set_frame_mode(
> + chip, port, MV88E6XXX_FRAME_MODE_NORMAL);
> + if (err)
> + return err;
> +
> + return chip->info->ops->port_set_egress_unknowns(chip, port, false);
> +}
The port's EgressMode, FrameMode and EtherType are really tied together
to compose the mode of the port. Could you add an helper in chip.c like:
static int mv88e6xxx_set_port_mode(struct mv88e6xxx_chip *chip, int port,
enum mv88e6xxx_frame_mode frame_mode,
u16 egress_mode, bool egress_unknown,
u16 ethertype)
{
int err;
if (chip->info->ops->port_set_frame_mode) {
err = chip->info->ops->port_set_frame_mode(chip, port, frame_mode);
if (err)
return err;
}
err = mv88e6xxx_port_set_egress_mode(chip, port, egress_mode);
if (err)
return err;
if (chip->info->ops->port_set_egress_unknown) {
err = chip->info->ops->port_set_egress_unknown(chip, port, egress_unknown);
if (err)
return err;
}
if (chip->info->ops->port_set_ether_type) {
err = chip->info->ops->port_set_ether_type(chip, port, ethertype);
if (err)
return err;
}
return 0;
}
So that we correctly check for ops before calling them, and make
mv88e6xxx_setup_port_{dsa,cpu,normal} a bit more concise.
> +
> static int mv88e6xxx_setup_port(struct mv88e6xxx_chip *chip, int port)
> {
> struct dsa_switch *ds = chip->ds;
> @@ -2473,44 +2542,25 @@ static int mv88e6xxx_setup_port(struct mv88e6xxx_chip *chip, int port)
> * If this is the upstream port for this switch, enable
> * forwarding of unknown unicasts and multicasts.
> */
> - reg = 0;
> - if (mv88e6xxx_6352_family(chip) || mv88e6xxx_6351_family(chip) ||
> - mv88e6xxx_6165_family(chip) || mv88e6xxx_6097_family(chip) ||
> - mv88e6xxx_6095_family(chip) || mv88e6xxx_6065_family(chip) ||
> - mv88e6xxx_6185_family(chip) || mv88e6xxx_6320_family(chip))
> - reg = PORT_CONTROL_IGMP_MLD_SNOOP |
> + reg = PORT_CONTROL_IGMP_MLD_SNOOP |
> PORT_CONTROL_USE_TAG | PORT_CONTROL_USE_IP |
> PORT_CONTROL_STATE_FORWARDING;
> + err = mv88e6xxx_port_write(chip, port, PORT_CONTROL, reg);
> + if (err)
> + return err;
> +
> if (dsa_is_cpu_port(ds, port)) {
> - if (chip->info->tag_protocol == DSA_TAG_PROTO_EDSA)
> - reg |= PORT_CONTROL_FRAME_ETHER_TYPE_DSA |
> - PORT_CONTROL_FORWARD_UNKNOWN_MC;
> - else
> - reg |= PORT_CONTROL_DSA_TAG;
> - reg |= PORT_CONTROL_EGRESS_ADD_TAG |
> - PORT_CONTROL_FORWARD_UNKNOWN;
> - }
> - if (dsa_is_dsa_port(ds, port)) {
> - if (mv88e6xxx_6095_family(chip) ||
> - mv88e6xxx_6185_family(chip))
> - reg |= PORT_CONTROL_DSA_TAG;
> - if (mv88e6xxx_6352_family(chip) ||
> - mv88e6xxx_6351_family(chip) ||
> - mv88e6xxx_6165_family(chip) ||
> - mv88e6xxx_6097_family(chip) ||
> - mv88e6xxx_6320_family(chip)) {
> - reg |= PORT_CONTROL_FRAME_MODE_DSA;
> + err = mv88e6xxx_setup_port_cpu(chip, port);
> + } else {
> + if (dsa_is_dsa_port(ds, port)) {
> + err = mv88e6xxx_setup_port_dsa(chip, port,
> + dsa_upstream_port(ds));
> + } else {
> + err = mv88e6xxx_setup_port_normal(chip, port);
> }
> -
> - if (port == dsa_upstream_port(ds))
> - reg |= PORT_CONTROL_FORWARD_UNKNOWN |
> - PORT_CONTROL_FORWARD_UNKNOWN_MC;
> - }
> - if (reg) {
> - err = mv88e6xxx_port_write(chip, port, PORT_CONTROL, reg);
> - if (err)
> - return err;
> }
The statement is weird. Can you please do:
if (dsa_is_cpu_port(ds, port)) {
// CPU port setup
} else if (dsa_is_dsa_port(ds, port)) {
// DSA port setup
} else {
// Normal port setup
}
> + if (err)
> + return err;
> + int (*port_set_frame_mode)(struct mv88e6xxx_chip *chip, int port,
> + enum mv88e6xxx_frame_mode mode);
> + int (*port_set_egress_unknowns)(struct mv88e6xxx_chip *chip, int port,
> + bool on);
"unknowns" sounds odd. "floods" is what all datasheet (except 6185)
use. That'd be better I think. Or at least, s/unknowns/unknown/...
Thanks,
Vivien
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