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Merge branch 'net-dsa-mv88e6xxx-accelerate-c45-scan'
Klaus Kudielka says:
====================
net: dsa: mv88e6xxx: accelerate C45 scan
Starting with commit 1a136ca2e0 ("net: mdio: scan bus based on bus
capabilities for C22 and C45"), mdiobus_scan_bus_c45() is being called on
buses with MDIOBUS_NO_CAP. On a Turris Omnia (Armada 385, 88E6176 switch),
this causes a significant increase of boot time, from 1.6 seconds, to 6.3
seconds. The boot time stated here is until start of /init.
Further testing revealed that the C45 scan is indeed expensive (around
2.7 seconds, due to a huge number of bus transactions), and called twice.
Two things were suggested:
(1) to move the expensive call of mv88e6xxx_mdios_register() from
mv88e6xxx_probe() to mv88e6xxx_setup().
(2) to mask apparently non-existing phys during probing.
Before that:
Patch #1 prepares the driver to handle the movement of
mv88e6xxx_mdios_register() to mv88e6xxx_setup() for cross-chip DSA trees.
Patch #2 is preparatory code movement, without functional change.
With those changes, boot time on the Turris Omnia is back to normal.
Link: https://lore.kernel.org/lkml/449bde236c08d5ab5e54abd73b645d8b29955894.camel@gmail.com/
====================
Link: https://lore.kernel.org/r/20230315163846.3114-1-klaus.kudielka@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski
commit
0e23f8ea4d
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|
@ -3680,11 +3680,218 @@ static int mv88e6390_setup_errata(struct mv88e6xxx_chip *chip)
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return mv88e6xxx_software_reset(chip);
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}
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/* prod_id for switch families which do not have a PHY model number */
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static const u16 family_prod_id_table[] = {
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[MV88E6XXX_FAMILY_6341] = MV88E6XXX_PORT_SWITCH_ID_PROD_6341,
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[MV88E6XXX_FAMILY_6390] = MV88E6XXX_PORT_SWITCH_ID_PROD_6390,
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[MV88E6XXX_FAMILY_6393] = MV88E6XXX_PORT_SWITCH_ID_PROD_6393X,
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};
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static int mv88e6xxx_mdio_read(struct mii_bus *bus, int phy, int reg)
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{
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struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
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struct mv88e6xxx_chip *chip = mdio_bus->chip;
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u16 prod_id;
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u16 val;
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int err;
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if (!chip->info->ops->phy_read)
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return -EOPNOTSUPP;
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mv88e6xxx_reg_lock(chip);
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err = chip->info->ops->phy_read(chip, bus, phy, reg, &val);
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mv88e6xxx_reg_unlock(chip);
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/* Some internal PHYs don't have a model number. */
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if (reg == MII_PHYSID2 && !(val & 0x3f0) &&
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chip->info->family < ARRAY_SIZE(family_prod_id_table)) {
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prod_id = family_prod_id_table[chip->info->family];
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if (prod_id)
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val |= prod_id >> 4;
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}
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return err ? err : val;
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}
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static int mv88e6xxx_mdio_read_c45(struct mii_bus *bus, int phy, int devad,
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int reg)
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{
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struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
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struct mv88e6xxx_chip *chip = mdio_bus->chip;
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u16 val;
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int err;
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if (!chip->info->ops->phy_read_c45)
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return -EOPNOTSUPP;
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mv88e6xxx_reg_lock(chip);
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err = chip->info->ops->phy_read_c45(chip, bus, phy, devad, reg, &val);
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mv88e6xxx_reg_unlock(chip);
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return err ? err : val;
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}
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static int mv88e6xxx_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
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{
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struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
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struct mv88e6xxx_chip *chip = mdio_bus->chip;
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int err;
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if (!chip->info->ops->phy_write)
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return -EOPNOTSUPP;
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mv88e6xxx_reg_lock(chip);
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err = chip->info->ops->phy_write(chip, bus, phy, reg, val);
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mv88e6xxx_reg_unlock(chip);
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return err;
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}
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static int mv88e6xxx_mdio_write_c45(struct mii_bus *bus, int phy, int devad,
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int reg, u16 val)
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{
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struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
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struct mv88e6xxx_chip *chip = mdio_bus->chip;
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int err;
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if (!chip->info->ops->phy_write_c45)
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return -EOPNOTSUPP;
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mv88e6xxx_reg_lock(chip);
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err = chip->info->ops->phy_write_c45(chip, bus, phy, devad, reg, val);
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mv88e6xxx_reg_unlock(chip);
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return err;
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}
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static int mv88e6xxx_mdio_register(struct mv88e6xxx_chip *chip,
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struct device_node *np,
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bool external)
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{
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static int index;
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struct mv88e6xxx_mdio_bus *mdio_bus;
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struct mii_bus *bus;
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int err;
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if (external) {
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mv88e6xxx_reg_lock(chip);
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err = mv88e6xxx_g2_scratch_gpio_set_smi(chip, true);
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mv88e6xxx_reg_unlock(chip);
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if (err)
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return err;
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}
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bus = mdiobus_alloc_size(sizeof(*mdio_bus));
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if (!bus)
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return -ENOMEM;
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mdio_bus = bus->priv;
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mdio_bus->bus = bus;
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mdio_bus->chip = chip;
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INIT_LIST_HEAD(&mdio_bus->list);
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mdio_bus->external = external;
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if (np) {
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bus->name = np->full_name;
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snprintf(bus->id, MII_BUS_ID_SIZE, "%pOF", np);
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} else {
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bus->name = "mv88e6xxx SMI";
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snprintf(bus->id, MII_BUS_ID_SIZE, "mv88e6xxx-%d", index++);
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}
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bus->read = mv88e6xxx_mdio_read;
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bus->write = mv88e6xxx_mdio_write;
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bus->read_c45 = mv88e6xxx_mdio_read_c45;
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bus->write_c45 = mv88e6xxx_mdio_write_c45;
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bus->parent = chip->dev;
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bus->phy_mask = GENMASK(31, mv88e6xxx_num_ports(chip));
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if (!external) {
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err = mv88e6xxx_g2_irq_mdio_setup(chip, bus);
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if (err)
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goto out;
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}
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err = of_mdiobus_register(bus, np);
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if (err) {
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dev_err(chip->dev, "Cannot register MDIO bus (%d)\n", err);
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mv88e6xxx_g2_irq_mdio_free(chip, bus);
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goto out;
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}
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if (external)
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list_add_tail(&mdio_bus->list, &chip->mdios);
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else
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list_add(&mdio_bus->list, &chip->mdios);
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return 0;
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out:
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mdiobus_free(bus);
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return err;
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}
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static void mv88e6xxx_mdios_unregister(struct mv88e6xxx_chip *chip)
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{
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struct mv88e6xxx_mdio_bus *mdio_bus, *p;
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struct mii_bus *bus;
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list_for_each_entry_safe(mdio_bus, p, &chip->mdios, list) {
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bus = mdio_bus->bus;
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if (!mdio_bus->external)
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mv88e6xxx_g2_irq_mdio_free(chip, bus);
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mdiobus_unregister(bus);
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mdiobus_free(bus);
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}
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}
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static int mv88e6xxx_mdios_register(struct mv88e6xxx_chip *chip)
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{
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struct device_node *np = chip->dev->of_node;
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struct device_node *child;
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int err;
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/* Always register one mdio bus for the internal/default mdio
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* bus. This maybe represented in the device tree, but is
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* optional.
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*/
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child = of_get_child_by_name(np, "mdio");
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err = mv88e6xxx_mdio_register(chip, child, false);
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of_node_put(child);
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if (err)
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return err;
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/* Walk the device tree, and see if there are any other nodes
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* which say they are compatible with the external mdio
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* bus.
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*/
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for_each_available_child_of_node(np, child) {
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if (of_device_is_compatible(
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child, "marvell,mv88e6xxx-mdio-external")) {
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err = mv88e6xxx_mdio_register(chip, child, true);
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if (err) {
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mv88e6xxx_mdios_unregister(chip);
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of_node_put(child);
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return err;
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}
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}
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}
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return 0;
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}
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static void mv88e6xxx_teardown(struct dsa_switch *ds)
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{
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struct mv88e6xxx_chip *chip = ds->priv;
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mv88e6xxx_teardown_devlink_params(ds);
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dsa_devlink_resources_unregister(ds);
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mv88e6xxx_teardown_devlink_regions_global(ds);
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mv88e6xxx_mdios_unregister(chip);
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}
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static int mv88e6xxx_setup(struct dsa_switch *ds)
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@ -3694,6 +3901,10 @@ static int mv88e6xxx_setup(struct dsa_switch *ds)
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int err;
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int i;
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err = mv88e6xxx_mdios_register(chip);
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if (err)
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return err;
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chip->ds = ds;
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ds->slave_mii_bus = mv88e6xxx_default_mdio_bus(chip);
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||||
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@ -3820,7 +4031,7 @@ static int mv88e6xxx_setup(struct dsa_switch *ds)
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mv88e6xxx_reg_unlock(chip);
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if (err)
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return err;
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goto out_mdios;
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/* Have to be called without holding the register lock, since
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* they take the devlink lock, and we later take the locks in
|
||||
|
|
@ -3829,7 +4040,7 @@ static int mv88e6xxx_setup(struct dsa_switch *ds)
|
|||
*/
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err = mv88e6xxx_setup_devlink_resources(ds);
|
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if (err)
|
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return err;
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||||
goto out_mdios;
|
||||
|
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err = mv88e6xxx_setup_devlink_params(ds);
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if (err)
|
||||
|
|
@ -3845,6 +4056,8 @@ static int mv88e6xxx_setup(struct dsa_switch *ds)
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|||
mv88e6xxx_teardown_devlink_params(ds);
|
||||
out_resources:
|
||||
dsa_devlink_resources_unregister(ds);
|
||||
out_mdios:
|
||||
mv88e6xxx_mdios_unregister(chip);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
|
@ -3859,209 +4072,6 @@ static void mv88e6xxx_port_teardown(struct dsa_switch *ds, int port)
|
|||
mv88e6xxx_teardown_devlink_regions_port(ds, port);
|
||||
}
|
||||
|
||||
/* prod_id for switch families which do not have a PHY model number */
|
||||
static const u16 family_prod_id_table[] = {
|
||||
[MV88E6XXX_FAMILY_6341] = MV88E6XXX_PORT_SWITCH_ID_PROD_6341,
|
||||
[MV88E6XXX_FAMILY_6390] = MV88E6XXX_PORT_SWITCH_ID_PROD_6390,
|
||||
[MV88E6XXX_FAMILY_6393] = MV88E6XXX_PORT_SWITCH_ID_PROD_6393X,
|
||||
};
|
||||
|
||||
static int mv88e6xxx_mdio_read(struct mii_bus *bus, int phy, int reg)
|
||||
{
|
||||
struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
|
||||
struct mv88e6xxx_chip *chip = mdio_bus->chip;
|
||||
u16 prod_id;
|
||||
u16 val;
|
||||
int err;
|
||||
|
||||
if (!chip->info->ops->phy_read)
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
mv88e6xxx_reg_lock(chip);
|
||||
err = chip->info->ops->phy_read(chip, bus, phy, reg, &val);
|
||||
mv88e6xxx_reg_unlock(chip);
|
||||
|
||||
/* Some internal PHYs don't have a model number. */
|
||||
if (reg == MII_PHYSID2 && !(val & 0x3f0) &&
|
||||
chip->info->family < ARRAY_SIZE(family_prod_id_table)) {
|
||||
prod_id = family_prod_id_table[chip->info->family];
|
||||
if (prod_id)
|
||||
val |= prod_id >> 4;
|
||||
}
|
||||
|
||||
return err ? err : val;
|
||||
}
|
||||
|
||||
static int mv88e6xxx_mdio_read_c45(struct mii_bus *bus, int phy, int devad,
|
||||
int reg)
|
||||
{
|
||||
struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
|
||||
struct mv88e6xxx_chip *chip = mdio_bus->chip;
|
||||
u16 val;
|
||||
int err;
|
||||
|
||||
if (!chip->info->ops->phy_read_c45)
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
mv88e6xxx_reg_lock(chip);
|
||||
err = chip->info->ops->phy_read_c45(chip, bus, phy, devad, reg, &val);
|
||||
mv88e6xxx_reg_unlock(chip);
|
||||
|
||||
return err ? err : val;
|
||||
}
|
||||
|
||||
static int mv88e6xxx_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
|
||||
{
|
||||
struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
|
||||
struct mv88e6xxx_chip *chip = mdio_bus->chip;
|
||||
int err;
|
||||
|
||||
if (!chip->info->ops->phy_write)
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
mv88e6xxx_reg_lock(chip);
|
||||
err = chip->info->ops->phy_write(chip, bus, phy, reg, val);
|
||||
mv88e6xxx_reg_unlock(chip);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int mv88e6xxx_mdio_write_c45(struct mii_bus *bus, int phy, int devad,
|
||||
int reg, u16 val)
|
||||
{
|
||||
struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
|
||||
struct mv88e6xxx_chip *chip = mdio_bus->chip;
|
||||
int err;
|
||||
|
||||
if (!chip->info->ops->phy_write_c45)
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
mv88e6xxx_reg_lock(chip);
|
||||
err = chip->info->ops->phy_write_c45(chip, bus, phy, devad, reg, val);
|
||||
mv88e6xxx_reg_unlock(chip);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int mv88e6xxx_mdio_register(struct mv88e6xxx_chip *chip,
|
||||
struct device_node *np,
|
||||
bool external)
|
||||
{
|
||||
static int index;
|
||||
struct mv88e6xxx_mdio_bus *mdio_bus;
|
||||
struct mii_bus *bus;
|
||||
int err;
|
||||
|
||||
if (external) {
|
||||
mv88e6xxx_reg_lock(chip);
|
||||
err = mv88e6xxx_g2_scratch_gpio_set_smi(chip, true);
|
||||
mv88e6xxx_reg_unlock(chip);
|
||||
|
||||
if (err)
|
||||
return err;
|
||||
}
|
||||
|
||||
bus = mdiobus_alloc_size(sizeof(*mdio_bus));
|
||||
if (!bus)
|
||||
return -ENOMEM;
|
||||
|
||||
mdio_bus = bus->priv;
|
||||
mdio_bus->bus = bus;
|
||||
mdio_bus->chip = chip;
|
||||
INIT_LIST_HEAD(&mdio_bus->list);
|
||||
mdio_bus->external = external;
|
||||
|
||||
if (np) {
|
||||
bus->name = np->full_name;
|
||||
snprintf(bus->id, MII_BUS_ID_SIZE, "%pOF", np);
|
||||
} else {
|
||||
bus->name = "mv88e6xxx SMI";
|
||||
snprintf(bus->id, MII_BUS_ID_SIZE, "mv88e6xxx-%d", index++);
|
||||
}
|
||||
|
||||
bus->read = mv88e6xxx_mdio_read;
|
||||
bus->write = mv88e6xxx_mdio_write;
|
||||
bus->read_c45 = mv88e6xxx_mdio_read_c45;
|
||||
bus->write_c45 = mv88e6xxx_mdio_write_c45;
|
||||
bus->parent = chip->dev;
|
||||
|
||||
if (!external) {
|
||||
err = mv88e6xxx_g2_irq_mdio_setup(chip, bus);
|
||||
if (err)
|
||||
goto out;
|
||||
}
|
||||
|
||||
err = of_mdiobus_register(bus, np);
|
||||
if (err) {
|
||||
dev_err(chip->dev, "Cannot register MDIO bus (%d)\n", err);
|
||||
mv88e6xxx_g2_irq_mdio_free(chip, bus);
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (external)
|
||||
list_add_tail(&mdio_bus->list, &chip->mdios);
|
||||
else
|
||||
list_add(&mdio_bus->list, &chip->mdios);
|
||||
|
||||
return 0;
|
||||
|
||||
out:
|
||||
mdiobus_free(bus);
|
||||
return err;
|
||||
}
|
||||
|
||||
static void mv88e6xxx_mdios_unregister(struct mv88e6xxx_chip *chip)
|
||||
|
||||
{
|
||||
struct mv88e6xxx_mdio_bus *mdio_bus, *p;
|
||||
struct mii_bus *bus;
|
||||
|
||||
list_for_each_entry_safe(mdio_bus, p, &chip->mdios, list) {
|
||||
bus = mdio_bus->bus;
|
||||
|
||||
if (!mdio_bus->external)
|
||||
mv88e6xxx_g2_irq_mdio_free(chip, bus);
|
||||
|
||||
mdiobus_unregister(bus);
|
||||
mdiobus_free(bus);
|
||||
}
|
||||
}
|
||||
|
||||
static int mv88e6xxx_mdios_register(struct mv88e6xxx_chip *chip,
|
||||
struct device_node *np)
|
||||
{
|
||||
struct device_node *child;
|
||||
int err;
|
||||
|
||||
/* Always register one mdio bus for the internal/default mdio
|
||||
* bus. This maybe represented in the device tree, but is
|
||||
* optional.
|
||||
*/
|
||||
child = of_get_child_by_name(np, "mdio");
|
||||
err = mv88e6xxx_mdio_register(chip, child, false);
|
||||
of_node_put(child);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
/* Walk the device tree, and see if there are any other nodes
|
||||
* which say they are compatible with the external mdio
|
||||
* bus.
|
||||
*/
|
||||
for_each_available_child_of_node(np, child) {
|
||||
if (of_device_is_compatible(
|
||||
child, "marvell,mv88e6xxx-mdio-external")) {
|
||||
err = mv88e6xxx_mdio_register(chip, child, true);
|
||||
if (err) {
|
||||
mv88e6xxx_mdios_unregister(chip);
|
||||
of_node_put(child);
|
||||
return err;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mv88e6xxx_get_eeprom_len(struct dsa_switch *ds)
|
||||
{
|
||||
struct mv88e6xxx_chip *chip = ds->priv;
|
||||
|
|
@ -7228,18 +7238,12 @@ static int mv88e6xxx_probe(struct mdio_device *mdiodev)
|
|||
if (err)
|
||||
goto out_g1_atu_prob_irq;
|
||||
|
||||
err = mv88e6xxx_mdios_register(chip, np);
|
||||
err = mv88e6xxx_register_switch(chip);
|
||||
if (err)
|
||||
goto out_g1_vtu_prob_irq;
|
||||
|
||||
err = mv88e6xxx_register_switch(chip);
|
||||
if (err)
|
||||
goto out_mdio;
|
||||
|
||||
return 0;
|
||||
|
||||
out_mdio:
|
||||
mv88e6xxx_mdios_unregister(chip);
|
||||
out_g1_vtu_prob_irq:
|
||||
mv88e6xxx_g1_vtu_prob_irq_free(chip);
|
||||
out_g1_atu_prob_irq:
|
||||
|
|
@ -7276,7 +7280,6 @@ static void mv88e6xxx_remove(struct mdio_device *mdiodev)
|
|||
|
||||
mv88e6xxx_phy_destroy(chip);
|
||||
mv88e6xxx_unregister_switch(chip);
|
||||
mv88e6xxx_mdios_unregister(chip);
|
||||
|
||||
mv88e6xxx_g1_vtu_prob_irq_free(chip);
|
||||
mv88e6xxx_g1_atu_prob_irq_free(chip);
|
||||
|
|
|
|||
|
|
@ -1176,31 +1176,19 @@ int mv88e6xxx_g2_irq_setup(struct mv88e6xxx_chip *chip)
|
|||
int mv88e6xxx_g2_irq_mdio_setup(struct mv88e6xxx_chip *chip,
|
||||
struct mii_bus *bus)
|
||||
{
|
||||
int phy, irq, err, err_phy;
|
||||
int phy, irq;
|
||||
|
||||
for (phy = 0; phy < chip->info->num_internal_phys; phy++) {
|
||||
irq = irq_find_mapping(chip->g2_irq.domain, phy);
|
||||
if (irq < 0) {
|
||||
err = irq;
|
||||
goto out;
|
||||
}
|
||||
if (irq < 0)
|
||||
return irq;
|
||||
|
||||
bus->irq[chip->info->phy_base_addr + phy] = irq;
|
||||
}
|
||||
return 0;
|
||||
out:
|
||||
err_phy = phy;
|
||||
|
||||
for (phy = 0; phy < err_phy; phy++)
|
||||
irq_dispose_mapping(bus->irq[phy]);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
void mv88e6xxx_g2_irq_mdio_free(struct mv88e6xxx_chip *chip,
|
||||
struct mii_bus *bus)
|
||||
{
|
||||
int phy;
|
||||
|
||||
for (phy = 0; phy < chip->info->num_internal_phys; phy++)
|
||||
irq_dispose_mapping(bus->irq[phy]);
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user