ARM: dts: r8a7793: Add SDHI controllers - linux-dev - Linux kernel development work

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author	Ulrich Hecht <ulrich.hecht+renesas@gmail.com>	2016-04-18 18:02:56 +0200
committer	Simon Horman <horms+renesas@verge.net.au>	2016-04-25 14:10:10 +1000
commit	fc9ee228f5005437b9fdb1b85804b6d3f8d497be (patch)
tree	7c05a50c412bf2c80169e880c908054bfd7f5066 /tools/perf/scripts/python/stat-cpi.py
parent	ARM: dts: r8a7790: fix max-frequency for SDHI (diff)

ARM: dts: r8a7793: Add SDHI controllers

Same as on r8a7791. Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Diffstat (limited to 'tools/perf/scripts/python/stat-cpi.py')

0 files changed, 0 insertions, 0 deletions

// SPDX-License-Identifier: GPL-2.0-or-later /* * net/dsa/dsa2.c - Hardware switch handling, binding version 2 * Copyright (c) 2008-2009 Marvell Semiconductor * Copyright (c) 2013 Florian Fainelli <florian@openwrt.org> * Copyright (c) 2016 Andrew Lunn <andrew@lunn.ch> */ #include <linux/device.h> #include <linux/err.h> #include <linux/list.h> #include <linux/netdevice.h> #include <linux/slab.h> #include <linux/rtnetlink.h> #include <linux/of.h> #include <linux/of_net.h> #include <net/devlink.h> #include "dsa_priv.h" static DEFINE_MUTEX(dsa2_mutex); LIST_HEAD(dsa_tree_list); /** * dsa_tree_notify - Execute code for all switches in a DSA switch tree. * @dst: collection of struct dsa_switch devices to notify. * @e: event, must be of type DSA_NOTIFIER_* * @v: event-specific value. * * Given a struct dsa_switch_tree, this can be used to run a function once for * each member DSA switch. The other alternative of traversing the tree is only * through its ports list, which does not uniquely list the switches. */ int dsa_tree_notify(struct dsa_switch_tree *dst, unsigned long e, void *v) { struct raw_notifier_head *nh = &dst->nh; int err; err = raw_notifier_call_chain(nh, e, v); return notifier_to_errno(err); } /** * dsa_broadcast - Notify all DSA trees in the system. * @e: event, must be of type DSA_NOTIFIER_* * @v: event-specific value. * * Can be used to notify the switching fabric of events such as cross-chip * bridging between disjoint trees (such as islands of tagger-compatible * switches bridged by an incompatible middle switch). */ int dsa_broadcast(unsigned long e, void *v) { struct dsa_switch_tree *dst; int err = 0; list_for_each_entry(dst, &dsa_tree_list, list) { err = dsa_tree_notify(dst, e, v); if (err) break; } return err; } /** * dsa_lag_map() - Map LAG netdev to a linear LAG ID * @dst: Tree in which to record the mapping. * @lag: Netdev that is to be mapped to an ID. * * dsa_lag_id/dsa_lag_dev can then be used to translate between the * two spaces. The size of the mapping space is determined by the * driver by setting ds->num_lag_ids. It is perfectly legal to leave * it unset if it is not needed, in which case these functions become * no-ops. */ void dsa_lag_map(struct dsa_switch_tree *dst, struct net_device *lag) { unsigned int id; if (dsa_lag_id(dst, lag) >= 0) /* Already mapped */ return; for (id = 0; id < dst->lags_len; id++) { if (!dsa_lag_dev(dst, id)) { dst->lags[id] = lag; return; } } /* No IDs left, which is OK. Some drivers do not need it. The * ones that do, e.g. mv88e6xxx, will discover that dsa_lag_id * returns an error for this device when joining the LAG. The * driver can then return -EOPNOTSUPP back to DSA, which will * fall back to a software LAG. */ } /** * dsa_lag_unmap() - Remove a LAG ID mapping * @dst: Tree in which the mapping is recorded. * @lag: Netdev that was mapped. * * As there may be multiple users of the mapping, it is only removed * if there are no other references to it. */ void dsa_lag_unmap(struct dsa_switch_tree *dst, struct net_device *lag) { struct dsa_port *dp; unsigned int id; dsa_lag_foreach_port(dp, dst, lag) /* There are remaining users of this mapping */ return; dsa_lags_foreach_id(id, dst) { if (dsa_lag_dev(dst, id) == lag) { dst->lags[id] = NULL; break; } } } struct dsa_switch *dsa_switch_find(int tree_index, int sw_index) { struct dsa_switch_tree *dst; struct dsa_port *dp; list_for_each_entry(dst, &dsa_tree_list, list) { if (dst->index != tree_index) continue; list_for_each_entry(dp, &dst->ports, list) { if (dp->ds->index != sw_index) continue; return dp->ds; } } return NULL; } EXPORT_SYMBOL_GPL(dsa_switch_find); static struct dsa_switch_tree *dsa_tree_find(int index) { struct dsa_switch_tree *dst; list_for_each_entry(dst, &dsa_tree_list, list) if (dst->index == index) return dst; return NULL; } static struct dsa_switch_tree *dsa_tree_alloc(int index) { struct dsa_switch_tree *dst; dst = kzalloc(sizeof(*dst), GFP_KERNEL); if (!dst) return NULL; dst->index = index; INIT_LIST_HEAD(&dst->rtable); INIT_LIST_HEAD(&dst->ports); INIT_LIST_HEAD(&dst->list); list_add_tail(&dst->list, &dsa_tree_list); kref_init(&dst->refcount); return dst; } static void dsa_tree_free(struct dsa_switch_tree *dst) { if (dst->tag_ops) dsa_tag_driver_put(dst->tag_ops); list_del(&dst->list); kfree(dst); } static struct dsa_switch_tree *dsa_tree_get(struct dsa_switch_tree *dst) { if (dst) kref_get(&dst->refcount); return dst; } static struct dsa_switch_tree *dsa_tree_touch(int index) { struct dsa_switch_tree *dst; dst = dsa_tree_find(index); if (dst) return dsa_tree_get(dst); else return dsa_tree_alloc(index); } static void dsa_tree_release(struct kref *ref) { struct dsa_switch_tree *dst; dst = container_of(ref, struct dsa_switch_tree, refcount); dsa_tree_free(dst); } static void dsa_tree_put(struct dsa_switch_tree *dst) { if (dst) kref_put(&dst->refcount, dsa_tree_release); } static bool dsa_port_is_dsa(struct dsa_port *port) { return port->type == DSA_PORT_TYPE_DSA; } static bool dsa_port_is_cpu(struct dsa_port *port) { return port->type == DSA_PORT_TYPE_CPU; } static bool dsa_port_is_user(struct dsa_port *dp) { return dp->type == DSA_PORT_TYPE_USER; } static struct dsa_port *dsa_tree_find_port_by_node(struct dsa_switch_tree *dst, struct device_node *dn) { struct dsa_port *dp; list_for_each_entry(dp, &dst->ports, list) if (dp->dn == dn) return dp; return NULL; } static struct dsa_link *dsa_link_touch(struct dsa_port *dp, struct dsa_port *link_dp) { struct dsa_switch *ds = dp->ds; struct dsa_switch_tree *dst; struct dsa_link *dl; dst = ds->dst; list_for_each_entry(dl, &dst->rtable, list) if (dl->dp == dp && dl->link_dp == link_dp) return dl; dl = kzalloc(sizeof(*dl), GFP_KERNEL); if (!dl) return NULL; dl->dp = dp; dl->link_dp = link_dp; INIT_LIST_HEAD(&dl->list); list_add_tail(&dl->list, &dst->rtable); return dl; } static bool dsa_port_setup_routing_table(struct dsa_port *dp) { struct dsa_switch *ds = dp->ds; struct dsa_switch_tree *dst = ds->dst; struct device_node *dn = dp->dn; struct of_phandle_iterator it; struct dsa_port *link_dp; struct dsa_link *dl; int err; of_for_each_phandle(&it, err, dn, "link", NULL, 0) { link_dp = dsa_tree_find_port_by_node(dst, it.node); if (!link_dp) { of_node_put(it.node); return false; } dl = dsa_link_touch(dp, link_dp); if (!dl) { of_node_put(it.node); return false; } } return true; } static bool dsa_tree_setup_routing_table(struct dsa_switch_tree *dst) { bool complete = true; struct dsa_port *dp; list_for_each_entry(dp, &dst->ports, list) { if (dsa_port_is_dsa(dp)) { complete = dsa_port_setup_routing_table(dp); if (!complete) break; } } return complete; } static struct dsa_port *dsa_tree_find_first_cpu(struct dsa_switch_tree *dst) { struct dsa_port *dp; list_for_each_entry(dp, &dst->ports, list) if (dsa_port_is_cpu(dp)) return dp; return NULL; } static int dsa_tree_setup_default_cpu(struct dsa_switch_tree *dst) { struct dsa_port *cpu_dp, *dp; cpu_dp = dsa_tree_find_first_cpu(dst); if (!cpu_dp) { pr_err("DSA: tree %d has no CPU port\n", dst->index); return -EINVAL; } /* Assign the default CPU port to all ports of the fabric */ list_for_each_entry(dp, &dst->ports, list) if (dsa_port_is_user(dp) || dsa_port_is_dsa(dp)) dp->cpu_dp = cpu_dp; return 0; } static void dsa_tree_teardown_default_cpu(struct dsa_switch_tree *dst) { struct dsa_port *dp; list_for_each_entry(dp, &dst->ports, list) if (dsa_port_is_user(dp) || dsa_port_is_dsa(dp)) dp->cpu_dp = NULL; } static int dsa_port_setup(struct dsa_port *dp) { struct devlink_port *dlp = &dp->devlink_port; bool dsa_port_link_registered = false; bool dsa_port_enabled = false; int err = 0; if (dp->setup) return 0; switch (dp->type) { case DSA_PORT_TYPE_UNUSED: dsa_port_disable(dp); break; case DSA_PORT_TYPE_CPU: err = dsa_port_link_register_of(dp); if (err) break; dsa_port_link_registered = true; err = dsa_port_enable(dp, NULL); if (err) break; dsa_port_enabled = true; break; case DSA_PORT_TYPE_DSA: err = dsa_port_link_register_of(dp); if (err) break; dsa_port_link_registered = true; err = dsa_port_enable(dp, NULL); if (err) break; dsa_port_enabled = true; break; case DSA_PORT_TYPE_USER: dp->mac = of_get_mac_address(dp->dn); err = dsa_slave_create(dp); if (err) break; devlink_port_type_eth_set(dlp, dp->slave); break; } if (err && dsa_port_enabled) dsa_port_disable(dp); if (err && dsa_port_link_registered) dsa_port_link_unregister_of(dp); if (err) return err; dp->setup = true; return 0; } static int dsa_port_devlink_setup(struct dsa_port *dp) { struct devlink_port *dlp = &dp->devlink_port; struct dsa_switch_tree *dst = dp->ds->dst; struct devlink_port_attrs attrs = {}; struct devlink *dl = dp->ds->devlink; const unsigned char *id; unsigned char len; int err; id = (const unsigned char *)&dst->index; len = sizeof(dst->index); attrs.phys.port_number = dp->index; memcpy(attrs.switch_id.id, id, len); attrs.switch_id.id_len = len; memset(dlp, 0, sizeof(*dlp)); switch (dp->type) { case DSA_PORT_TYPE_UNUSED: attrs.flavour = DEVLINK_PORT_FLAVOUR_UNUSED; break; case DSA_PORT_TYPE_CPU: attrs.flavour = DEVLINK_PORT_FLAVOUR_CPU; break; case DSA_PORT_TYPE_DSA: attrs.flavour = DEVLINK_PORT_FLAVOUR_DSA; break; case DSA_PORT_TYPE_USER: attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL; break; } devlink_port_attrs_set(dlp, &attrs); err = devlink_port_register(dl, dlp, dp->index); if (!err) dp->devlink_port_setup = true; return err; } static void dsa_port_teardown(struct dsa_port *dp) { struct devlink_port *dlp = &dp->devlink_port; if (!dp->setup) return; devlink_port_type_clear(dlp); switch (dp->type) { case DSA_PORT_TYPE_UNUSED: break; case DSA_PORT_TYPE_CPU: dsa_port_disable(dp); dsa_port_link_unregister_of(dp); break; case DSA_PORT_TYPE_DSA: dsa_port_disable(dp); dsa_port_link_unregister_of(dp); break; case DSA_PORT_TYPE_USER: if (dp->slave) { dsa_slave_destroy(dp->slave); dp->slave = NULL; } break; } dp->setup = false; } static void dsa_port_devlink_teardown(struct dsa_port *dp) { struct devlink_port *dlp = &dp->devlink_port; if (dp->devlink_port_setup) devlink_port_unregister(dlp); dp->devlink_port_setup = false; } static int dsa_devlink_info_get(struct devlink *dl, struct devlink_info_req *req, struct netlink_ext_ack *extack) { struct dsa_switch *ds = dsa_devlink_to_ds(dl); if (ds->ops->devlink_info_get) return ds->ops->devlink_info_get(ds, req, extack); return -EOPNOTSUPP; } static int dsa_devlink_sb_pool_get(struct devlink *dl, unsigned int sb_index, u16 pool_index, struct devlink_sb_pool_info *pool_info) { struct dsa_switch *ds = dsa_devlink_to_ds(dl); if (!ds->ops->devlink_sb_pool_get) return -EOPNOTSUPP; return ds->ops->devlink_sb_pool_get(ds, sb_index, pool_index, pool_info); } static int dsa_devlink_sb_pool_set(struct devlink *dl, unsigned int sb_index, u16 pool_index, u32 size, enum devlink_sb_threshold_type threshold_type, struct netlink_ext_ack *extack) { struct dsa_switch *ds = dsa_devlink_to_ds(dl); if (!ds->ops->devlink_sb_pool_set) return -EOPNOTSUPP; return ds->ops->devlink_sb_pool_set(ds, sb_index, pool_index, size, threshold_type, extack); } static int dsa_devlink_sb_port_pool_get(struct devlink_port *dlp, unsigned int sb_index, u16 pool_index, u32 *p_threshold) { struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp); int port = dsa_devlink_port_to_port(dlp); if (!ds->ops->devlink_sb_port_pool_get) return -EOPNOTSUPP; return ds->ops->devlink_sb_port_pool_get(ds, port, sb_index, pool_index, p_threshold); } static int dsa_devlink_sb_port_pool_set(struct devlink_port *dlp, unsigned int sb_index, u16 pool_index, u32 threshold, struct netlink_ext_ack *extack) { struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp); int port = dsa_devlink_port_to_port(dlp); if (!ds->ops->devlink_sb_port_pool_set) return -EOPNOTSUPP; return ds->ops->devlink_sb_port_pool_set(ds, port, sb_index, pool_index, threshold, extack); } static int dsa_devlink_sb_tc_pool_bind_get(struct devlink_port *dlp, unsigned int sb_index, u16 tc_index, enum devlink_sb_pool_type pool_type, u16 *p_pool_index, u32 *p_threshold) { struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp); int port = dsa_devlink_port_to_port(dlp); if (!ds->ops->devlink_sb_tc_pool_bind_get) return -EOPNOTSUPP; return ds->ops->devlink_sb_tc_pool_bind_get(ds, port, sb_index, tc_index, pool_type, p_pool_index, p_threshold); } static int dsa_devlink_sb_tc_pool_bind_set(struct devlink_port *dlp, unsigned int sb_index, u16 tc_index, enum devlink_sb_pool_type pool_type, u16 pool_index, u32 threshold, struct netlink_ext_ack *extack) { struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp); int port = dsa_devlink_port_to_port(dlp); if (!ds->ops->devlink_sb_tc_pool_bind_set) return -EOPNOTSUPP; return ds->ops->devlink_sb_tc_pool_bind_set(ds, port, sb_index, tc_index, pool_type, pool_index, threshold, extack); } static int dsa_devlink_sb_occ_snapshot(struct devlink *dl, unsigned int sb_index) { struct dsa_switch *ds = dsa_devlink_to_ds(dl); if (!ds->ops->devlink_sb_occ_snapshot) return -EOPNOTSUPP; return ds->ops->devlink_sb_occ_snapshot(ds, sb_index); } static int dsa_devlink_sb_occ_max_clear(struct devlink *dl, unsigned int sb_index) { struct dsa_switch *ds = dsa_devlink_to_ds(dl); if (!ds->ops->devlink_sb_occ_max_clear) return -EOPNOTSUPP; return ds->ops->devlink_sb_occ_max_clear(ds, sb_index); } static int dsa_devlink_sb_occ_port_pool_get(struct devlink_port *dlp, unsigned int sb_index, u16 pool_index, u32 *p_cur, u32 *p_max) { struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp); int port = dsa_devlink_port_to_port(dlp); if (!ds->ops->devlink_sb_occ_port_pool_get) return -EOPNOTSUPP; return ds->ops->devlink_sb_occ_port_pool_get(ds, port, sb_index, pool_index, p_cur, p_max); } static int dsa_devlink_sb_occ_tc_port_bind_get(struct devlink_port *dlp, unsigned int sb_index, u16 tc_index, enum devlink_sb_pool_type pool_type, u32 *p_cur, u32 *p_max) { struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp); int port = dsa_devlink_port_to_port(dlp); if (!ds->ops->devlink_sb_occ_tc_port_bind_get) return -EOPNOTSUPP; return ds->ops->devlink_sb_occ_tc_port_bind_get(ds, port, sb_index, tc_index, pool_type, p_cur, p_max); } static const struct devlink_ops dsa_devlink_ops = { .info_get = dsa_devlink_info_get, .sb_pool_get = dsa_devlink_sb_pool_get, .sb_pool_set = dsa_devlink_sb_pool_set, .sb_port_pool_get = dsa_devlink_sb_port_pool_get, .sb_port_pool_set = dsa_devlink_sb_port_pool_set, .sb_tc_pool_bind_get = dsa_devlink_sb_tc_pool_bind_get, .sb_tc_pool_bind_set = dsa_devlink_sb_tc_pool_bind_set, .sb_occ_snapshot = dsa_devlink_sb_occ_snapshot, .sb_occ_max_clear = dsa_devlink_sb_occ_max_clear, .sb_occ_port_pool_get = dsa_devlink_sb_occ_port_pool_get, .sb_occ_tc_port_bind_get = dsa_devlink_sb_occ_tc_port_bind_get, }; static int dsa_switch_setup(struct dsa_switch *ds) { struct dsa_devlink_priv *dl_priv; struct dsa_port *dp; int err; if (ds->setup) return 0; /* Initialize ds->phys_mii_mask before registering the slave MDIO bus * driver and before ops->setup() has run, since the switch drivers and * the slave MDIO bus driver rely on these values for probing PHY * devices or not */ ds->phys_mii_mask |= dsa_user_ports(ds); /* Add the switch to devlink before calling setup, so that setup can * add dpipe tables */ ds->devlink = devlink_alloc(&dsa_devlink_ops, sizeof(*dl_priv)); if (!ds->devlink) return -ENOMEM; dl_priv = devlink_priv(ds->devlink); dl_priv->ds = ds; err = devlink_register(ds->devlink, ds->dev); if (err) goto free_devlink; /* Setup devlink port instances now, so that the switch * setup() can register regions etc, against the ports */ list_for_each_entry(dp, &ds->dst->ports, list) { if (dp->ds == ds) { err = dsa_port_devlink_setup(dp); if (err) goto unregister_devlink_ports; } } err = dsa_switch_register_notifier(ds); if (err) goto unregister_devlink_ports; ds->configure_vlan_while_not_filtering = true; err = ds->ops->setup(ds); if (err < 0) goto unregister_notifier; devlink_params_publish(ds->devlink); if (!ds->slave_mii_bus && ds->ops->phy_read) { ds->slave_mii_bus = devm_mdiobus_alloc(ds->dev); if (!ds->slave_mii_bus) { err = -ENOMEM; goto teardown; } dsa_slave_mii_bus_init(ds); err = mdiobus_register(ds->slave_mii_bus); if (err < 0) goto teardown; } ds->setup = true; return 0; teardown: if (ds->ops->teardown) ds->ops->teardown(ds); unregister_notifier: dsa_switch_unregister_notifier(ds); unregister_devlink_ports: list_for_each_entry(dp, &ds->dst->ports, list) if (dp->ds == ds) dsa_port_devlink_teardown(dp); devlink_unregister(ds->devlink); free_devlink: devlink_free(ds->devlink); ds->devlink = NULL; return err; } static void dsa_switch_teardown(struct dsa_switch *ds) { struct dsa_port *dp; if (!ds->setup) return; if (ds->slave_mii_bus && ds->ops->phy_read) mdiobus_unregister(ds->slave_mii_bus); dsa_switch_unregister_notifier(ds); if (ds->ops->teardown) ds->ops->teardown(ds); if (ds->devlink) { list_for_each_entry(dp, &ds->dst->ports, list) if (dp->ds == ds) dsa_port_devlink_teardown(dp); devlink_unregister(ds->devlink); devlink_free(ds->devlink); ds->devlink = NULL; } ds->setup = false; } static int dsa_tree_setup_switches(struct dsa_switch_tree *dst) { struct dsa_port *dp; int err; list_for_each_entry(dp, &dst->ports, list) { err = dsa_switch_setup(dp->ds); if (err) goto teardown; } list_for_each_entry(dp, &dst->ports, list) { err = dsa_port_setup(dp); if (err) { dsa_port_devlink_teardown(dp); dp->type = DSA_PORT_TYPE_UNUSED; err = dsa_port_devlink_setup(dp); if (err) goto teardown; continue; } } return 0; teardown: list_for_each_entry(dp, &dst->ports, list) dsa_port_teardown(dp); list_for_each_entry(dp, &dst->ports, list) dsa_switch_teardown(dp->ds); return err; } static void dsa_tree_teardown_switches(struct dsa_switch_tree *dst) { struct dsa_port *dp; list_for_each_entry(dp, &dst->ports, list) dsa_port_teardown(dp); list_for_each_entry(dp, &dst->ports, list) dsa_switch_teardown(dp->ds); } static int dsa_tree_setup_master(struct dsa_switch_tree *dst) { struct dsa_port *dp; int err; list_for_each_entry(dp, &dst->ports, list) { if (dsa_port_is_cpu(dp)) { err = dsa_master_setup(dp->master, dp); if (err) return err; } } return 0; } static void dsa_tree_teardown_master(struct dsa_switch_tree *dst) { struct dsa_port *dp; list_for_each_entry(dp, &dst->ports, list) if (dsa_port_is_cpu(dp)) dsa_master_teardown(dp->master); } static int dsa_tree_setup_lags(struct dsa_switch_tree *dst) { unsigned int len = 0; struct dsa_port *dp; list_for_each_entry(dp, &dst->ports, list) { if (dp->ds->num_lag_ids > len) len = dp->ds->num_lag_ids; } if (!len) return 0; dst->lags = kcalloc(len, sizeof(*dst->lags), GFP_KERNEL); if (!dst->lags) return -ENOMEM; dst->lags_len = len; return 0; } static void dsa_tree_teardown_lags(struct dsa_switch_tree *dst) { kfree(dst->lags); } static int dsa_tree_setup(struct dsa_switch_tree *dst) { bool complete; int err; if (dst->setup) { pr_err("DSA: tree %d already setup! Disjoint trees?\n", dst->index); return -EEXIST; } complete = dsa_tree_setup_routing_table(dst); if (!complete) return 0; err = dsa_tree_setup_default_cpu(dst); if (err) return err; err = dsa_tree_setup_switches(dst); if (err) goto teardown_default_cpu; err = dsa_tree_setup_master(dst); if (err) goto teardown_switches; err = dsa_tree_setup_lags(dst); if (err) goto teardown_master; dst->setup = true; pr_info("DSA: tree %d setup\n", dst->index); return 0; teardown_master: dsa_tree_teardown_master(dst); teardown_switches: dsa_tree_teardown_switches(dst); teardown_default_cpu: dsa_tree_teardown_default_cpu(dst); return err; } static void dsa_tree_teardown(struct dsa_switch_tree *dst) { struct dsa_link *dl, *next; if (!dst->setup) return; dsa_tree_teardown_lags(dst); dsa_tree_teardown_master(dst); dsa_tree_teardown_switches(dst); dsa_tree_teardown_default_cpu(dst); list_for_each_entry_safe(dl, next, &dst->rtable, list) { list_del(&dl->list); kfree(dl); } pr_info("DSA: tree %d torn down\n", dst->index); dst->setup = false; } /* Since the dsa/tagging sysfs device attribute is per master, the assumption * is that all DSA switches within a tree share the same tagger, otherwise * they would have formed disjoint trees (different "dsa,member" values). */ int dsa_tree_change_tag_proto(struct dsa_switch_tree *dst, struct net_device *master, const struct dsa_device_ops *tag_ops, const struct dsa_device_ops *old_tag_ops) { struct dsa_notifier_tag_proto_info info; struct dsa_port *dp; int err = -EBUSY; if (!rtnl_trylock()) return restart_syscall(); /* At the moment we don't allow changing the tag protocol under * traffic. The rtnl_mutex also happens to serialize concurrent * attempts to change the tagging protocol. If we ever lift the IFF_UP * restriction, there needs to be another mutex which serializes this. */ if (master->flags & IFF_UP) goto out_unlock; list_for_each_entry(dp, &dst->ports, list) { if (!dsa_is_user_port(dp->ds, dp->index)) continue; if (dp->slave->flags & IFF_UP) goto out_unlock; } info.tag_ops = tag_ops; err = dsa_tree_notify(dst, DSA_NOTIFIER_TAG_PROTO, &info); if (err) goto out_unwind_tagger; dst->tag_ops = tag_ops; rtnl_unlock(); return 0; out_unwind_tagger: info.tag_ops = old_tag_ops; dsa_tree_notify(dst, DSA_NOTIFIER_TAG_PROTO, &info); out_unlock: rtnl_unlock(); return err; } static struct dsa_port *dsa_port_touch(struct dsa_switch *ds, int index) { struct dsa_switch_tree *dst = ds->dst; struct dsa_port *dp; list_for_each_entry(dp, &dst->ports, list) if (dp->ds == ds && dp->index == index) return dp; dp = kzalloc(sizeof(*dp), GFP_KERNEL); if (!dp) return NULL; dp->ds = ds; dp->index = index; INIT_LIST_HEAD(&dp->list); list_add_tail(&dp->list, &dst->ports); return dp; } static int dsa_port_parse_user(struct dsa_port *dp, const char *name) { if (!name) name = "eth%d"; dp->type = DSA_PORT_TYPE_USER; dp->name = name; return 0; } static int dsa_port_parse_dsa(struct dsa_port *dp) { dp->type = DSA_PORT_TYPE_DSA; return 0; } static enum dsa_tag_protocol dsa_get_tag_protocol(struct dsa_port *dp, struct net_device *master) { enum dsa_tag_protocol tag_protocol = DSA_TAG_PROTO_NONE; struct dsa_switch *mds, *ds = dp->ds; unsigned int mdp_upstream; struct dsa_port *mdp; /* It is possible to stack DSA switches onto one another when that * happens the switch driver may want to know if its tagging protocol * is going to work in such a configuration. */ if (dsa_slave_dev_check(master)) { mdp = dsa_slave_to_port(master); mds = mdp->ds; mdp_upstream = dsa_upstream_port(mds, mdp->index); tag_protocol = mds->ops->get_tag_protocol(mds, mdp_upstream, DSA_TAG_PROTO_NONE); } /* If the master device is not itself a DSA slave in a disjoint DSA * tree, then return immediately. */ return ds->ops->get_tag_protocol(ds, dp->index, tag_protocol); } static int dsa_port_parse_cpu(struct dsa_port *dp, struct net_device *master) { struct dsa_switch *ds = dp->ds; struct dsa_switch_tree *dst = ds->dst; const struct dsa_device_ops *tag_ops; enum dsa_tag_protocol tag_protocol; tag_protocol = dsa_get_tag_protocol(dp, master); if (dst->tag_ops) { if (dst->tag_ops->proto != tag_protocol) { dev_err(ds->dev, "A DSA switch tree can have only one tagging protocol\n"); return -EINVAL; } /* In the case of multiple CPU ports per switch, the tagging * protocol is still reference-counted only per switch tree, so * nothing to do here. */ } else { tag_ops = dsa_tag_driver_get(tag_protocol); if (IS_ERR(tag_ops)) { if (PTR_ERR(tag_ops) == -ENOPROTOOPT) return -EPROBE_DEFER; dev_warn(ds->dev, "No tagger for this switch\n"); dp->master = NULL; return PTR_ERR(tag_ops); } dst->tag_ops = tag_ops; } dp->master = master; dp->type = DSA_PORT_TYPE_CPU; dsa_port_set_tag_protocol(dp, dst->tag_ops); dp->dst = dst; return 0; } static int dsa_port_parse_of(struct dsa_port *dp, struct device_node *dn) { struct device_node *ethernet = of_parse_phandle(dn, "ethernet", 0); const char *name = of_get_property(dn, "label", NULL); bool link = of_property_read_bool(dn, "link"); dp->dn = dn; if (ethernet) { struct net_device *master; master = of_find_net_device_by_node(ethernet); if (!master) return -EPROBE_DEFER; return dsa_port_parse_cpu(dp, master); } if (link) return dsa_port_parse_dsa(dp); return dsa_port_parse_user(dp, name); } static int dsa_switch_parse_ports_of(struct dsa_switch *ds, struct device_node *dn) { struct device_node *ports, *port; struct dsa_port *dp; int err = 0; u32 reg; ports = of_get_child_by_name(dn, "ports"); if (!ports) { /* The second possibility is "ethernet-ports" */ ports = of_get_child_by_name(dn, "ethernet-ports"); if (!ports) { dev_err(ds->dev, "no ports child node found\n"); return -EINVAL; } } for_each_available_child_of_node(ports, port) { err = of_property_read_u32(port, "reg", &reg); if (err) goto out_put_node; if (reg >= ds->num_ports) { dev_err(ds->dev, "port %pOF index %u exceeds num_ports (%zu)\n", port, reg, ds->num_ports); err = -EINVAL; goto out_put_node; } dp = dsa_to_port(ds, reg); err = dsa_port_parse_of(dp, port); if (err) goto out_put_node; } out_put_node: of_node_put(ports); return err; } static int dsa_switch_parse_member_of(struct dsa_switch *ds, struct device_node *dn) { u32 m[2] = { 0, 0 }; int sz; /* Don't error out if this optional property isn't found */ sz = of_property_read_variable_u32_array(dn, "dsa,member", m, 2, 2); if (sz < 0 && sz != -EINVAL) return sz; ds->index = m[1]; ds->dst = dsa_tree_touch(m[0]); if (!ds->dst) return -ENOMEM; return 0; } static int dsa_switch_touch_ports(struct dsa_switch *ds) { struct dsa_port *dp; int port; for (port = 0; port < ds->num_ports; port++) { dp = dsa_port_touch(ds, port); if (!dp) return -ENOMEM; } return 0; } static int dsa_switch_parse_of(struct dsa_switch *ds, struct device_node *dn) { int err; err = dsa_switch_parse_member_of(ds, dn); if (err) return err; err = dsa_switch_touch_ports(ds); if (err) return err; return dsa_switch_parse_ports_of(ds, dn); } static int dsa_port_parse(struct dsa_port *dp, const char *name, struct device *dev) { if (!strcmp(name, "cpu")) { struct net_device *master; master = dsa_dev_to_net_device(dev); if (!master) return -EPROBE_DEFER; dev_put(master); return dsa_port_parse_cpu(dp, master); } if (!strcmp(name, "dsa")) return dsa_port_parse_dsa(dp); return dsa_port_parse_user(dp, name); } static int dsa_switch_parse_ports(struct dsa_switch *ds, struct dsa_chip_data *cd) { bool valid_name_found = false; struct dsa_port *dp; struct device *dev; const char *name; unsigned int i; int err; for (i = 0; i < DSA_MAX_PORTS; i++) { name = cd->port_names[i]; dev = cd->netdev[i]; dp = dsa_to_port(ds, i); if (!name) continue; err = dsa_port_parse(dp, name, dev); if (err) return err; valid_name_found = true; } if (!valid_name_found && i == DSA_MAX_PORTS) return -EINVAL; return 0; } static int dsa_switch_parse(struct dsa_switch *ds, struct dsa_chip_data *cd) { int err; ds->cd = cd; /* We don't support interconnected switches nor multiple trees via * platform data, so this is the unique switch of the tree. */ ds->index = 0; ds->dst = dsa_tree_touch(0); if (!ds->dst) return -ENOMEM; err = dsa_switch_touch_ports(ds); if (err) return err; return dsa_switch_parse_ports(ds, cd); } static void dsa_switch_release_ports(struct dsa_switch *ds) { struct dsa_switch_tree *dst = ds->dst; struct dsa_port *dp, *next; list_for_each_entry_safe(dp, next, &dst->ports, list) { if (dp->ds != ds) continue; list_del(&dp->list); kfree(dp); } } static int dsa_switch_probe(struct dsa_switch *ds) { struct dsa_switch_tree *dst; struct dsa_chip_data *pdata; struct device_node *np; int err; if (!ds->dev) return -ENODEV; pdata = ds->dev->platform_data; np = ds->dev->of_node; if (!ds->num_ports) return -EINVAL; if (np) { err = dsa_switch_parse_of(ds, np); if (err) dsa_switch_release_ports(ds); } else if (pdata) { err = dsa_switch_parse(ds, pdata); if (err) dsa_switch_release_ports(ds); } else { err = -ENODEV; } if (err) return err; dst = ds->dst; dsa_tree_get(dst); err = dsa_tree_setup(dst); if (err) { dsa_switch_release_ports(ds); dsa_tree_put(dst); } return err; } int dsa_register_switch(struct dsa_switch *ds) { int err; mutex_lock(&dsa2_mutex); err = dsa_switch_probe(ds); dsa_tree_put(ds->dst); mutex_unlock(&dsa2_mutex); return err; } EXPORT_SYMBOL_GPL(dsa_register_switch); static void dsa_switch_remove(struct dsa_switch *ds) { struct dsa_switch_tree *dst = ds->dst; dsa_tree_teardown(dst); dsa_switch_release_ports(ds); dsa_tree_put(dst); } void dsa_unregister_switch(struct dsa_switch *ds) { mutex_lock(&dsa2_mutex); dsa_switch_remove(ds); mutex_unlock(&dsa2_mutex); } EXPORT_SYMBOL_GPL(dsa_unregister_switch);


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