2016-06-05 02:17:07 +07:00
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/*
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* net/dsa/dsa2.c - Hardware switch handling, binding version 2
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* Copyright (c) 2008-2009 Marvell Semiconductor
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* Copyright (c) 2013 Florian Fainelli <florian@openwrt.org>
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* Copyright (c) 2016 Andrew Lunn <andrew@lunn.ch>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/list.h>
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2017-03-29 04:45:06 +07:00
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#include <linux/netdevice.h>
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2016-06-05 02:17:07 +07:00
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#include <linux/slab.h>
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#include <linux/rtnetlink.h>
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#include <linux/of.h>
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#include <linux/of_net.h>
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2017-05-18 02:46:03 +07:00
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2016-06-05 02:17:07 +07:00
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#include "dsa_priv.h"
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2017-11-04 06:05:24 +07:00
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static LIST_HEAD(dsa_tree_list);
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2016-06-05 02:17:07 +07:00
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static DEFINE_MUTEX(dsa2_mutex);
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2017-03-29 04:45:07 +07:00
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static const struct devlink_ops dsa_devlink_ops = {
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};
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2017-11-04 06:05:24 +07:00
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static struct dsa_switch_tree *dsa_tree_find(int index)
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2016-06-05 02:17:07 +07:00
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{
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struct dsa_switch_tree *dst;
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2017-11-04 06:05:24 +07:00
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list_for_each_entry(dst, &dsa_tree_list, list)
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2017-11-04 06:05:22 +07:00
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if (dst->index == index)
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2016-06-05 02:17:07 +07:00
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return dst;
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2017-11-04 06:05:22 +07:00
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2016-06-05 02:17:07 +07:00
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return NULL;
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}
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2017-11-04 06:05:24 +07:00
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static struct dsa_switch_tree *dsa_tree_alloc(int index)
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2016-06-05 02:17:07 +07:00
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{
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struct dsa_switch_tree *dst;
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dst = kzalloc(sizeof(*dst), GFP_KERNEL);
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if (!dst)
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return NULL;
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2017-11-04 06:05:24 +07:00
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2017-11-04 06:05:21 +07:00
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dst->index = index;
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2017-11-04 06:05:24 +07:00
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2016-06-05 02:17:07 +07:00
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INIT_LIST_HEAD(&dst->list);
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2017-11-04 06:05:24 +07:00
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list_add_tail(&dsa_tree_list, &dst->list);
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2017-11-04 06:05:22 +07:00
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/* Initialize the reference counter to the number of switches, not 1 */
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2016-06-05 02:17:07 +07:00
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kref_init(&dst->refcount);
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2017-11-04 06:05:22 +07:00
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refcount_set(&dst->refcount.refcount, 0);
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2016-06-05 02:17:07 +07:00
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return dst;
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}
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2017-11-04 06:05:23 +07:00
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static void dsa_tree_free(struct dsa_switch_tree *dst)
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{
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list_del(&dst->list);
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kfree(dst);
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}
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2017-11-04 06:05:24 +07:00
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static struct dsa_switch_tree *dsa_tree_touch(int index)
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{
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struct dsa_switch_tree *dst;
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dst = dsa_tree_find(index);
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if (!dst)
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dst = dsa_tree_alloc(index);
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return dst;
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}
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2017-11-04 06:05:23 +07:00
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static void dsa_tree_get(struct dsa_switch_tree *dst)
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{
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kref_get(&dst->refcount);
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}
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static void dsa_tree_release(struct kref *ref)
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{
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struct dsa_switch_tree *dst;
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dst = container_of(ref, struct dsa_switch_tree, refcount);
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dsa_tree_free(dst);
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}
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static void dsa_tree_put(struct dsa_switch_tree *dst)
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{
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kref_put(&dst->refcount, dsa_tree_release);
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}
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2017-02-05 04:02:43 +07:00
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/* For platform data configurations, we need to have a valid name argument to
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* differentiate a disabled port from an enabled one
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*/
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2017-01-27 01:45:52 +07:00
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static bool dsa_port_is_valid(struct dsa_port *port)
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2016-06-05 02:17:07 +07:00
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{
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2017-10-28 02:55:15 +07:00
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return port->type != DSA_PORT_TYPE_UNUSED;
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2016-06-05 02:17:07 +07:00
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}
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2017-01-27 01:45:52 +07:00
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static bool dsa_port_is_dsa(struct dsa_port *port)
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2016-06-05 02:17:07 +07:00
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{
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2017-10-28 02:55:15 +07:00
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return port->type == DSA_PORT_TYPE_DSA;
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2017-01-27 01:45:52 +07:00
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}
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static bool dsa_port_is_cpu(struct dsa_port *port)
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{
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2017-10-28 02:55:15 +07:00
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return port->type == DSA_PORT_TYPE_CPU;
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2016-06-05 02:17:07 +07:00
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}
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2017-01-27 01:45:53 +07:00
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static bool dsa_ds_find_port_dn(struct dsa_switch *ds,
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struct device_node *port)
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2016-06-05 02:17:07 +07:00
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{
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u32 index;
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2017-01-28 03:29:37 +07:00
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for (index = 0; index < ds->num_ports; index++)
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2016-06-05 02:17:07 +07:00
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if (ds->ports[index].dn == port)
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return true;
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return false;
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}
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2017-01-27 01:45:53 +07:00
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static struct dsa_switch *dsa_dst_find_port_dn(struct dsa_switch_tree *dst,
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struct device_node *port)
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2016-06-05 02:17:07 +07:00
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{
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struct dsa_switch *ds;
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u32 index;
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for (index = 0; index < DSA_MAX_SWITCHES; index++) {
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ds = dst->ds[index];
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if (!ds)
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continue;
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2017-01-27 01:45:53 +07:00
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if (dsa_ds_find_port_dn(ds, port))
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2016-06-05 02:17:07 +07:00
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return ds;
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}
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return NULL;
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}
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static int dsa_port_complete(struct dsa_switch_tree *dst,
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struct dsa_switch *src_ds,
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2017-01-27 01:45:52 +07:00
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struct dsa_port *port,
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2016-06-05 02:17:07 +07:00
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u32 src_port)
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{
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struct device_node *link;
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int index;
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struct dsa_switch *dst_ds;
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for (index = 0;; index++) {
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2017-01-27 01:45:52 +07:00
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link = of_parse_phandle(port->dn, "link", index);
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2016-06-05 02:17:07 +07:00
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if (!link)
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break;
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2017-01-27 01:45:53 +07:00
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dst_ds = dsa_dst_find_port_dn(dst, link);
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2016-06-05 02:17:07 +07:00
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of_node_put(link);
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if (!dst_ds)
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return 1;
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src_ds->rtable[dst_ds->index] = src_port;
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}
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return 0;
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}
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/* A switch is complete if all the DSA ports phandles point to ports
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* known in the tree. A return value of 1 means the tree is not
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* complete. This is not an error condition. A value of 0 is
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* success.
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*/
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static int dsa_ds_complete(struct dsa_switch_tree *dst, struct dsa_switch *ds)
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{
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2017-01-27 01:45:52 +07:00
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struct dsa_port *port;
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2016-06-05 02:17:07 +07:00
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u32 index;
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int err;
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2017-01-28 03:29:37 +07:00
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for (index = 0; index < ds->num_ports; index++) {
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2017-01-27 01:45:52 +07:00
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port = &ds->ports[index];
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if (!dsa_port_is_valid(port))
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2016-06-05 02:17:07 +07:00
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continue;
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if (!dsa_port_is_dsa(port))
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continue;
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err = dsa_port_complete(dst, ds, port, index);
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if (err != 0)
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return err;
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}
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return 0;
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}
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/* A tree is complete if all the DSA ports phandles point to ports
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* known in the tree. A return value of 1 means the tree is not
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* complete. This is not an error condition. A value of 0 is
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* success.
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*/
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static int dsa_dst_complete(struct dsa_switch_tree *dst)
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{
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struct dsa_switch *ds;
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u32 index;
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int err;
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for (index = 0; index < DSA_MAX_SWITCHES; index++) {
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ds = dst->ds[index];
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if (!ds)
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continue;
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err = dsa_ds_complete(dst, ds);
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if (err != 0)
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return err;
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}
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return 0;
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}
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2017-06-03 02:31:22 +07:00
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static int dsa_dsa_port_apply(struct dsa_port *port)
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2016-06-05 02:17:07 +07:00
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{
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2017-06-03 02:31:22 +07:00
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struct dsa_switch *ds = port->ds;
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2016-06-05 02:17:07 +07:00
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int err;
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2017-10-26 21:50:07 +07:00
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err = dsa_port_fixed_link_register_of(port);
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2016-06-05 02:17:07 +07:00
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if (err) {
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dev_warn(ds->dev, "Failed to setup dsa port %d: %d\n",
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2017-06-03 02:31:22 +07:00
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port->index, err);
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2016-06-05 02:17:07 +07:00
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return err;
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}
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2017-06-03 02:31:22 +07:00
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memset(&port->devlink_port, 0, sizeof(port->devlink_port));
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2017-03-29 04:45:07 +07:00
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2017-06-03 02:31:22 +07:00
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return devlink_port_register(ds->devlink, &port->devlink_port,
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port->index);
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2016-06-05 02:17:07 +07:00
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}
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2017-06-03 02:31:22 +07:00
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static void dsa_dsa_port_unapply(struct dsa_port *port)
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2016-06-05 02:17:07 +07:00
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{
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2017-06-03 02:31:22 +07:00
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devlink_port_unregister(&port->devlink_port);
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2017-10-26 21:50:07 +07:00
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dsa_port_fixed_link_unregister_of(port);
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2016-06-05 02:17:07 +07:00
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}
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2017-06-03 02:31:22 +07:00
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static int dsa_cpu_port_apply(struct dsa_port *port)
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2016-06-05 02:17:07 +07:00
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{
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2017-06-03 02:31:22 +07:00
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struct dsa_switch *ds = port->ds;
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2016-06-05 02:17:07 +07:00
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int err;
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2017-10-26 21:50:07 +07:00
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err = dsa_port_fixed_link_register_of(port);
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2016-06-05 02:17:07 +07:00
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if (err) {
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dev_warn(ds->dev, "Failed to setup cpu port %d: %d\n",
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2017-06-03 02:31:22 +07:00
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port->index, err);
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2016-06-05 02:17:07 +07:00
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return err;
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}
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2017-06-03 02:31:22 +07:00
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memset(&port->devlink_port, 0, sizeof(port->devlink_port));
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err = devlink_port_register(ds->devlink, &port->devlink_port,
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port->index);
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2017-03-29 04:45:07 +07:00
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return err;
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2016-06-05 02:17:07 +07:00
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}
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2017-06-03 02:31:22 +07:00
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static void dsa_cpu_port_unapply(struct dsa_port *port)
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2016-06-05 02:17:07 +07:00
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{
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2017-06-03 02:31:22 +07:00
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devlink_port_unregister(&port->devlink_port);
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2017-10-26 21:50:07 +07:00
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dsa_port_fixed_link_unregister_of(port);
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2016-06-05 02:17:07 +07:00
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}
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2017-06-03 02:31:22 +07:00
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static int dsa_user_port_apply(struct dsa_port *port)
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2016-06-05 02:17:07 +07:00
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{
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2017-06-03 02:31:22 +07:00
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struct dsa_switch *ds = port->ds;
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2016-06-05 02:17:07 +07:00
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int err;
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2017-10-28 02:55:19 +07:00
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err = dsa_slave_create(port);
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2016-06-05 02:17:07 +07:00
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if (err) {
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dev_warn(ds->dev, "Failed to create slave %d: %d\n",
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2017-06-03 02:31:22 +07:00
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port->index, err);
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2017-10-16 22:12:18 +07:00
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port->slave = NULL;
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2016-06-05 02:17:07 +07:00
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return err;
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}
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2017-06-03 02:31:22 +07:00
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memset(&port->devlink_port, 0, sizeof(port->devlink_port));
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err = devlink_port_register(ds->devlink, &port->devlink_port,
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port->index);
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2017-03-29 04:45:07 +07:00
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if (err)
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return err;
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2017-10-16 22:12:18 +07:00
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devlink_port_type_eth_set(&port->devlink_port, port->slave);
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2017-03-29 04:45:07 +07:00
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2016-06-05 02:17:07 +07:00
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return 0;
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}
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2017-06-03 02:31:22 +07:00
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static void dsa_user_port_unapply(struct dsa_port *port)
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2016-06-05 02:17:07 +07:00
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{
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2017-06-03 02:31:22 +07:00
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devlink_port_unregister(&port->devlink_port);
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2017-10-16 22:12:18 +07:00
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if (port->slave) {
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dsa_slave_destroy(port->slave);
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port->slave = NULL;
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2016-06-05 02:17:07 +07:00
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}
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}
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static int dsa_ds_apply(struct dsa_switch_tree *dst, struct dsa_switch *ds)
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{
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2017-01-27 01:45:52 +07:00
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struct dsa_port *port;
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2016-06-05 02:17:07 +07:00
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u32 index;
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int err;
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2016-06-08 06:32:39 +07:00
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/* Initialize ds->phys_mii_mask before registering the slave MDIO bus
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2016-08-23 23:38:56 +07:00
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|
|
* driver and before ops->setup() has run, since the switch drivers and
|
2016-06-08 06:32:39 +07:00
|
|
|
* the slave MDIO bus driver rely on these values for probing PHY
|
|
|
|
* devices or not
|
|
|
|
*/
|
2017-10-26 22:22:56 +07:00
|
|
|
ds->phys_mii_mask |= dsa_user_ports(ds);
|
2016-06-08 06:32:39 +07:00
|
|
|
|
2017-03-29 04:45:07 +07:00
|
|
|
/* Add the switch to devlink before calling setup, so that setup can
|
|
|
|
* add dpipe tables
|
|
|
|
*/
|
|
|
|
ds->devlink = devlink_alloc(&dsa_devlink_ops, 0);
|
|
|
|
if (!ds->devlink)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
err = devlink_register(ds->devlink, ds->dev);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
2016-08-23 23:38:56 +07:00
|
|
|
err = ds->ops->setup(ds);
|
2016-06-05 02:17:07 +07:00
|
|
|
if (err < 0)
|
|
|
|
return err;
|
|
|
|
|
2017-02-04 01:20:20 +07:00
|
|
|
err = dsa_switch_register_notifier(ds);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
2016-08-23 23:38:56 +07:00
|
|
|
if (!ds->slave_mii_bus && ds->ops->phy_read) {
|
2016-06-08 06:32:40 +07:00
|
|
|
ds->slave_mii_bus = devm_mdiobus_alloc(ds->dev);
|
|
|
|
if (!ds->slave_mii_bus)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
dsa_slave_mii_bus_init(ds);
|
|
|
|
|
|
|
|
err = mdiobus_register(ds->slave_mii_bus);
|
|
|
|
if (err < 0)
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2017-01-28 03:29:37 +07:00
|
|
|
for (index = 0; index < ds->num_ports; index++) {
|
2017-01-27 01:45:52 +07:00
|
|
|
port = &ds->ports[index];
|
|
|
|
if (!dsa_port_is_valid(port))
|
2016-06-05 02:17:07 +07:00
|
|
|
continue;
|
|
|
|
|
|
|
|
if (dsa_port_is_dsa(port)) {
|
2017-06-03 02:31:22 +07:00
|
|
|
err = dsa_dsa_port_apply(port);
|
2016-06-05 02:17:07 +07:00
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dsa_port_is_cpu(port)) {
|
2017-06-03 02:31:22 +07:00
|
|
|
err = dsa_cpu_port_apply(port);
|
2016-06-05 02:17:07 +07:00
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2017-06-03 02:31:22 +07:00
|
|
|
err = dsa_user_port_apply(port);
|
2016-06-05 02:17:07 +07:00
|
|
|
if (err)
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void dsa_ds_unapply(struct dsa_switch_tree *dst, struct dsa_switch *ds)
|
|
|
|
{
|
2017-01-27 01:45:52 +07:00
|
|
|
struct dsa_port *port;
|
2016-06-05 02:17:07 +07:00
|
|
|
u32 index;
|
|
|
|
|
2017-01-28 03:29:37 +07:00
|
|
|
for (index = 0; index < ds->num_ports; index++) {
|
2017-01-27 01:45:52 +07:00
|
|
|
port = &ds->ports[index];
|
|
|
|
if (!dsa_port_is_valid(port))
|
2016-06-05 02:17:07 +07:00
|
|
|
continue;
|
|
|
|
|
|
|
|
if (dsa_port_is_dsa(port)) {
|
2017-06-03 02:31:22 +07:00
|
|
|
dsa_dsa_port_unapply(port);
|
2016-06-05 02:17:07 +07:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dsa_port_is_cpu(port)) {
|
2017-06-03 02:31:22 +07:00
|
|
|
dsa_cpu_port_unapply(port);
|
2016-06-05 02:17:07 +07:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2017-06-03 02:31:22 +07:00
|
|
|
dsa_user_port_unapply(port);
|
2016-06-05 02:17:07 +07:00
|
|
|
}
|
2016-06-08 06:32:40 +07:00
|
|
|
|
2016-08-23 23:38:56 +07:00
|
|
|
if (ds->slave_mii_bus && ds->ops->phy_read)
|
2016-06-08 06:32:40 +07:00
|
|
|
mdiobus_unregister(ds->slave_mii_bus);
|
2017-02-04 01:20:20 +07:00
|
|
|
|
|
|
|
dsa_switch_unregister_notifier(ds);
|
2017-03-29 04:45:07 +07:00
|
|
|
|
|
|
|
if (ds->devlink) {
|
|
|
|
devlink_unregister(ds->devlink);
|
|
|
|
devlink_free(ds->devlink);
|
|
|
|
ds->devlink = NULL;
|
|
|
|
}
|
|
|
|
|
2016-06-05 02:17:07 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
static int dsa_dst_apply(struct dsa_switch_tree *dst)
|
|
|
|
{
|
|
|
|
struct dsa_switch *ds;
|
|
|
|
u32 index;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
for (index = 0; index < DSA_MAX_SWITCHES; index++) {
|
|
|
|
ds = dst->ds[index];
|
|
|
|
if (!ds)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
err = dsa_ds_apply(dst, ds);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If we use a tagging format that doesn't have an ethertype
|
|
|
|
* field, make sure that all packets from this point on get
|
|
|
|
* sent to the tag format's receive function.
|
|
|
|
*/
|
|
|
|
wmb();
|
2017-10-16 22:12:18 +07:00
|
|
|
dst->cpu_dp->master->dsa_ptr = dst->cpu_dp;
|
2017-09-19 22:56:59 +07:00
|
|
|
|
2017-10-16 22:12:18 +07:00
|
|
|
err = dsa_master_ethtool_setup(dst->cpu_dp->master);
|
2017-09-19 22:56:59 +07:00
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
2016-06-05 02:17:07 +07:00
|
|
|
dst->applied = true;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void dsa_dst_unapply(struct dsa_switch_tree *dst)
|
|
|
|
{
|
|
|
|
struct dsa_switch *ds;
|
|
|
|
u32 index;
|
|
|
|
|
|
|
|
if (!dst->applied)
|
|
|
|
return;
|
|
|
|
|
2017-10-16 22:12:18 +07:00
|
|
|
dsa_master_ethtool_restore(dst->cpu_dp->master);
|
2017-09-19 22:56:59 +07:00
|
|
|
|
2017-10-16 22:12:18 +07:00
|
|
|
dst->cpu_dp->master->dsa_ptr = NULL;
|
2016-06-05 02:17:07 +07:00
|
|
|
|
|
|
|
/* If we used a tagging format that doesn't have an ethertype
|
|
|
|
* field, make sure that all packets from this point get sent
|
|
|
|
* without the tag and go through the regular receive path.
|
|
|
|
*/
|
|
|
|
wmb();
|
|
|
|
|
|
|
|
for (index = 0; index < DSA_MAX_SWITCHES; index++) {
|
|
|
|
ds = dst->ds[index];
|
|
|
|
if (!ds)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
dsa_ds_unapply(dst, ds);
|
|
|
|
}
|
|
|
|
|
2017-09-19 22:56:58 +07:00
|
|
|
dst->cpu_dp = NULL;
|
2016-06-08 06:32:42 +07:00
|
|
|
|
2017-11-04 06:05:21 +07:00
|
|
|
pr_info("DSA: tree %d unapplied\n", dst->index);
|
2016-06-05 02:17:07 +07:00
|
|
|
dst->applied = false;
|
|
|
|
}
|
|
|
|
|
2017-11-04 06:05:25 +07:00
|
|
|
static void dsa_tree_remove_switch(struct dsa_switch_tree *dst,
|
|
|
|
unsigned int index)
|
|
|
|
{
|
|
|
|
dst->ds[index] = NULL;
|
|
|
|
dsa_tree_put(dst);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int dsa_tree_add_switch(struct dsa_switch_tree *dst,
|
|
|
|
struct dsa_switch *ds)
|
|
|
|
{
|
|
|
|
unsigned int index = ds->index;
|
|
|
|
|
|
|
|
if (dst->ds[index])
|
|
|
|
return -EBUSY;
|
|
|
|
|
|
|
|
dsa_tree_get(dst);
|
|
|
|
dst->ds[index] = ds;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-11-04 06:05:29 +07:00
|
|
|
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 int dsa_port_parse_cpu(struct dsa_port *dp, struct net_device *master)
|
|
|
|
{
|
2017-11-04 06:05:30 +07:00
|
|
|
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 = ds->ops->get_tag_protocol(ds);
|
|
|
|
tag_ops = dsa_resolve_tag_protocol(tag_protocol);
|
|
|
|
if (IS_ERR(tag_ops)) {
|
|
|
|
dev_warn(ds->dev, "No tagger for this switch\n");
|
|
|
|
return PTR_ERR(tag_ops);
|
|
|
|
}
|
|
|
|
|
2017-11-04 06:05:29 +07:00
|
|
|
dp->type = DSA_PORT_TYPE_CPU;
|
2017-11-04 06:05:30 +07:00
|
|
|
dp->rcv = tag_ops->rcv;
|
|
|
|
dp->tag_ops = tag_ops;
|
2017-11-04 06:05:29 +07:00
|
|
|
dp->master = master;
|
2017-11-04 06:05:30 +07:00
|
|
|
dp->dst = dst;
|
2017-11-04 06:05:29 +07:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-01-27 01:45:52 +07:00
|
|
|
static int dsa_cpu_parse(struct dsa_port *port, u32 index,
|
2016-06-05 02:17:07 +07:00
|
|
|
struct dsa_switch_tree *dst,
|
|
|
|
struct dsa_switch *ds)
|
|
|
|
{
|
2017-10-28 02:55:17 +07:00
|
|
|
if (!dst->cpu_dp)
|
2017-05-17 01:10:33 +07:00
|
|
|
dst->cpu_dp = port;
|
2016-06-05 02:17:07 +07:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int dsa_ds_parse(struct dsa_switch_tree *dst, struct dsa_switch *ds)
|
|
|
|
{
|
2017-01-27 01:45:52 +07:00
|
|
|
struct dsa_port *port;
|
2016-06-05 02:17:07 +07:00
|
|
|
u32 index;
|
|
|
|
int err;
|
|
|
|
|
2017-01-28 03:29:37 +07:00
|
|
|
for (index = 0; index < ds->num_ports; index++) {
|
2017-01-27 01:45:52 +07:00
|
|
|
port = &ds->ports[index];
|
2017-06-03 02:31:23 +07:00
|
|
|
if (!dsa_port_is_valid(port) ||
|
|
|
|
dsa_port_is_dsa(port))
|
2016-06-05 02:17:07 +07:00
|
|
|
continue;
|
|
|
|
|
|
|
|
if (dsa_port_is_cpu(port)) {
|
|
|
|
err = dsa_cpu_parse(port, index, dst, ds);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
}
|
2017-06-03 02:31:23 +07:00
|
|
|
|
2016-06-05 02:17:07 +07:00
|
|
|
}
|
|
|
|
|
2017-11-04 06:05:21 +07:00
|
|
|
pr_info("DSA: switch %d %d parsed\n", dst->index, ds->index);
|
2016-06-05 02:17:07 +07:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int dsa_dst_parse(struct dsa_switch_tree *dst)
|
|
|
|
{
|
|
|
|
struct dsa_switch *ds;
|
2017-06-16 02:06:54 +07:00
|
|
|
struct dsa_port *dp;
|
2016-06-05 02:17:07 +07:00
|
|
|
u32 index;
|
2017-06-16 02:06:54 +07:00
|
|
|
int port;
|
2016-06-05 02:17:07 +07:00
|
|
|
int err;
|
|
|
|
|
|
|
|
for (index = 0; index < DSA_MAX_SWITCHES; index++) {
|
|
|
|
ds = dst->ds[index];
|
|
|
|
if (!ds)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
err = dsa_ds_parse(dst, ds);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2017-08-29 07:10:51 +07:00
|
|
|
if (!dst->cpu_dp) {
|
2016-06-05 02:17:07 +07:00
|
|
|
pr_warn("Tree has no master device\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2017-06-16 02:06:54 +07:00
|
|
|
/* Assign the default CPU port to all ports of the fabric */
|
|
|
|
for (index = 0; index < DSA_MAX_SWITCHES; index++) {
|
|
|
|
ds = dst->ds[index];
|
|
|
|
if (!ds)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
for (port = 0; port < ds->num_ports; port++) {
|
|
|
|
dp = &ds->ports[port];
|
|
|
|
if (!dsa_port_is_valid(dp) ||
|
|
|
|
dsa_port_is_dsa(dp) ||
|
|
|
|
dsa_port_is_cpu(dp))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
dp->cpu_dp = dst->cpu_dp;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-11-04 06:05:21 +07:00
|
|
|
pr_info("DSA: tree %d parsed\n", dst->index);
|
2016-06-05 02:17:07 +07:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-10-28 02:55:14 +07:00
|
|
|
static int dsa_port_parse_of(struct dsa_port *dp, struct device_node *dn)
|
|
|
|
{
|
2017-10-28 02:55:15 +07:00
|
|
|
struct device_node *ethernet = of_parse_phandle(dn, "ethernet", 0);
|
2017-10-28 02:55:18 +07:00
|
|
|
const char *name = of_get_property(dn, "label", NULL);
|
2017-11-04 06:05:28 +07:00
|
|
|
bool link = of_property_read_bool(dn, "link");
|
2017-10-28 02:55:15 +07:00
|
|
|
|
2017-11-04 06:05:29 +07:00
|
|
|
dp->dn = dn;
|
|
|
|
|
2017-10-28 02:55:15 +07:00
|
|
|
if (ethernet) {
|
2017-10-28 02:55:17 +07:00
|
|
|
struct net_device *master;
|
|
|
|
|
|
|
|
master = of_find_net_device_by_node(ethernet);
|
|
|
|
if (!master)
|
|
|
|
return -EPROBE_DEFER;
|
|
|
|
|
2017-11-04 06:05:29 +07:00
|
|
|
return dsa_port_parse_cpu(dp, master);
|
2017-10-28 02:55:15 +07:00
|
|
|
}
|
|
|
|
|
2017-11-04 06:05:29 +07:00
|
|
|
if (link)
|
|
|
|
return dsa_port_parse_dsa(dp);
|
2017-10-28 02:55:14 +07:00
|
|
|
|
2017-11-04 06:05:29 +07:00
|
|
|
return dsa_port_parse_user(dp, name);
|
2017-10-28 02:55:14 +07:00
|
|
|
}
|
|
|
|
|
2017-11-04 06:05:27 +07:00
|
|
|
static int dsa_switch_parse_ports_of(struct dsa_switch *ds,
|
|
|
|
struct device_node *dn)
|
2016-06-05 02:17:07 +07:00
|
|
|
{
|
2017-10-28 02:55:13 +07:00
|
|
|
struct device_node *ports, *port;
|
2017-10-28 02:55:14 +07:00
|
|
|
struct dsa_port *dp;
|
2016-06-05 02:17:07 +07:00
|
|
|
u32 reg;
|
2017-10-28 02:55:13 +07:00
|
|
|
int err;
|
|
|
|
|
|
|
|
ports = of_get_child_by_name(dn, "ports");
|
|
|
|
if (!ports) {
|
|
|
|
dev_err(ds->dev, "no ports child node found\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
2016-06-05 02:17:07 +07:00
|
|
|
|
|
|
|
for_each_available_child_of_node(ports, port) {
|
|
|
|
err = of_property_read_u32(port, "reg", ®);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
2017-01-28 03:29:37 +07:00
|
|
|
if (reg >= ds->num_ports)
|
2016-06-05 02:17:07 +07:00
|
|
|
return -EINVAL;
|
|
|
|
|
2017-10-28 02:55:14 +07:00
|
|
|
dp = &ds->ports[reg];
|
|
|
|
|
|
|
|
err = dsa_port_parse_of(dp, port);
|
|
|
|
if (err)
|
|
|
|
return err;
|
2016-06-05 02:17:07 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-11-04 06:05:27 +07:00
|
|
|
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];
|
|
|
|
if (ds->index >= DSA_MAX_SWITCHES)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ds->dst = dsa_tree_touch(m[0]);
|
|
|
|
if (!ds->dst)
|
|
|
|
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;
|
|
|
|
|
|
|
|
return dsa_switch_parse_ports_of(ds, dn);
|
|
|
|
}
|
|
|
|
|
2017-10-28 02:55:14 +07:00
|
|
|
static int dsa_port_parse(struct dsa_port *dp, const char *name,
|
|
|
|
struct device *dev)
|
|
|
|
{
|
2017-10-28 02:55:15 +07:00
|
|
|
if (!strcmp(name, "cpu")) {
|
2017-10-28 02:55:17 +07:00
|
|
|
struct net_device *master;
|
|
|
|
|
|
|
|
master = dsa_dev_to_net_device(dev);
|
|
|
|
if (!master)
|
|
|
|
return -EPROBE_DEFER;
|
|
|
|
|
|
|
|
dev_put(master);
|
|
|
|
|
2017-11-04 06:05:29 +07:00
|
|
|
return dsa_port_parse_cpu(dp, master);
|
2017-10-28 02:55:15 +07:00
|
|
|
}
|
|
|
|
|
2017-11-04 06:05:29 +07:00
|
|
|
if (!strcmp(name, "dsa"))
|
|
|
|
return dsa_port_parse_dsa(dp);
|
2017-10-28 02:55:14 +07:00
|
|
|
|
2017-11-04 06:05:29 +07:00
|
|
|
return dsa_port_parse_user(dp, name);
|
2017-10-28 02:55:14 +07:00
|
|
|
}
|
|
|
|
|
2017-11-04 06:05:27 +07:00
|
|
|
static int dsa_switch_parse_ports(struct dsa_switch *ds,
|
|
|
|
struct dsa_chip_data *cd)
|
2017-02-05 04:02:43 +07:00
|
|
|
{
|
|
|
|
bool valid_name_found = false;
|
2017-10-28 02:55:14 +07:00
|
|
|
struct dsa_port *dp;
|
|
|
|
struct device *dev;
|
|
|
|
const char *name;
|
2017-02-05 04:02:43 +07:00
|
|
|
unsigned int i;
|
2017-10-28 02:55:14 +07:00
|
|
|
int err;
|
2017-02-05 04:02:43 +07:00
|
|
|
|
|
|
|
for (i = 0; i < DSA_MAX_PORTS; i++) {
|
2017-10-28 02:55:14 +07:00
|
|
|
name = cd->port_names[i];
|
|
|
|
dev = cd->netdev[i];
|
|
|
|
dp = &ds->ports[i];
|
|
|
|
|
|
|
|
if (!name)
|
2017-02-05 04:02:43 +07:00
|
|
|
continue;
|
|
|
|
|
2017-10-28 02:55:14 +07:00
|
|
|
err = dsa_port_parse(dp, name, dev);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
2017-02-05 04:02:43 +07:00
|
|
|
valid_name_found = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!valid_name_found && i == DSA_MAX_PORTS)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-11-04 06:05:27 +07:00
|
|
|
static int dsa_switch_parse(struct dsa_switch *ds, struct dsa_chip_data *cd)
|
2017-02-05 04:02:43 +07:00
|
|
|
{
|
2017-11-04 06:05:27 +07:00
|
|
|
ds->cd = cd;
|
2017-02-05 04:02:43 +07:00
|
|
|
|
2017-11-04 06:05:27 +07:00
|
|
|
/* 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;
|
2017-02-05 04:02:43 +07:00
|
|
|
|
2017-11-04 06:05:27 +07:00
|
|
|
return dsa_switch_parse_ports(ds, cd);
|
2017-02-05 04:02:43 +07:00
|
|
|
}
|
|
|
|
|
2017-05-27 05:12:51 +07:00
|
|
|
static int _dsa_register_switch(struct dsa_switch *ds)
|
2016-06-05 02:17:07 +07:00
|
|
|
{
|
2017-05-27 05:12:51 +07:00
|
|
|
struct dsa_chip_data *pdata = ds->dev->platform_data;
|
|
|
|
struct device_node *np = ds->dev->of_node;
|
2016-06-05 02:17:07 +07:00
|
|
|
struct dsa_switch_tree *dst;
|
2017-11-04 06:05:27 +07:00
|
|
|
unsigned int index;
|
2016-07-07 07:03:54 +07:00
|
|
|
int i, err;
|
2016-06-05 02:17:07 +07:00
|
|
|
|
2017-11-04 06:05:27 +07:00
|
|
|
if (np)
|
|
|
|
err = dsa_switch_parse_of(ds, np);
|
|
|
|
else if (pdata)
|
|
|
|
err = dsa_switch_parse(ds, pdata);
|
|
|
|
else
|
|
|
|
err = -ENODEV;
|
2016-06-05 02:17:07 +07:00
|
|
|
|
2017-11-04 06:05:27 +07:00
|
|
|
if (err)
|
|
|
|
return err;
|
2016-07-07 07:03:54 +07:00
|
|
|
|
2017-11-04 06:05:27 +07:00
|
|
|
index = ds->index;
|
|
|
|
dst = ds->dst;
|
2017-11-04 06:05:26 +07:00
|
|
|
|
2016-07-07 07:03:54 +07:00
|
|
|
/* Initialize the routing table */
|
|
|
|
for (i = 0; i < DSA_MAX_SWITCHES; ++i)
|
|
|
|
ds->rtable[i] = DSA_RTABLE_NONE;
|
|
|
|
|
2017-11-04 06:05:25 +07:00
|
|
|
err = dsa_tree_add_switch(dst, ds);
|
|
|
|
if (err)
|
|
|
|
return err;
|
2016-06-05 02:17:07 +07:00
|
|
|
|
|
|
|
err = dsa_dst_complete(dst);
|
|
|
|
if (err < 0)
|
|
|
|
goto out_del_dst;
|
|
|
|
|
2017-11-04 06:05:22 +07:00
|
|
|
/* Not all switches registered yet */
|
|
|
|
if (err == 1)
|
|
|
|
return 0;
|
2016-06-05 02:17:07 +07:00
|
|
|
|
|
|
|
if (dst->applied) {
|
|
|
|
pr_info("DSA: Disjoint trees?\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = dsa_dst_parse(dst);
|
2017-10-28 02:55:17 +07:00
|
|
|
if (err)
|
2016-06-05 02:17:07 +07:00
|
|
|
goto out_del_dst;
|
|
|
|
|
|
|
|
err = dsa_dst_apply(dst);
|
|
|
|
if (err) {
|
|
|
|
dsa_dst_unapply(dst);
|
|
|
|
goto out_del_dst;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
out_del_dst:
|
2017-11-04 06:05:25 +07:00
|
|
|
dsa_tree_remove_switch(dst, index);
|
2016-06-05 02:17:07 +07:00
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2017-01-28 03:29:36 +07:00
|
|
|
struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n)
|
|
|
|
{
|
|
|
|
size_t size = sizeof(struct dsa_switch) + n * sizeof(struct dsa_port);
|
|
|
|
struct dsa_switch *ds;
|
2017-01-28 03:29:38 +07:00
|
|
|
int i;
|
2017-01-28 03:29:36 +07:00
|
|
|
|
|
|
|
ds = devm_kzalloc(dev, size, GFP_KERNEL);
|
|
|
|
if (!ds)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
ds->dev = dev;
|
|
|
|
ds->num_ports = n;
|
|
|
|
|
2017-01-28 03:29:38 +07:00
|
|
|
for (i = 0; i < ds->num_ports; ++i) {
|
|
|
|
ds->ports[i].index = i;
|
|
|
|
ds->ports[i].ds = ds;
|
|
|
|
}
|
|
|
|
|
2017-01-28 03:29:36 +07:00
|
|
|
return ds;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(dsa_switch_alloc);
|
|
|
|
|
2017-05-27 05:12:51 +07:00
|
|
|
int dsa_register_switch(struct dsa_switch *ds)
|
2016-06-05 02:17:07 +07:00
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
|
|
|
mutex_lock(&dsa2_mutex);
|
2017-05-27 05:12:51 +07:00
|
|
|
err = _dsa_register_switch(ds);
|
2016-06-05 02:17:07 +07:00
|
|
|
mutex_unlock(&dsa2_mutex);
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(dsa_register_switch);
|
|
|
|
|
2016-07-12 22:24:10 +07:00
|
|
|
static void _dsa_unregister_switch(struct dsa_switch *ds)
|
2016-06-05 02:17:07 +07:00
|
|
|
{
|
|
|
|
struct dsa_switch_tree *dst = ds->dst;
|
2017-11-04 06:05:25 +07:00
|
|
|
unsigned int index = ds->index;
|
2016-06-05 02:17:07 +07:00
|
|
|
|
|
|
|
dsa_dst_unapply(dst);
|
|
|
|
|
2017-11-04 06:05:25 +07:00
|
|
|
dsa_tree_remove_switch(dst, index);
|
2016-06-05 02:17:07 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
void dsa_unregister_switch(struct dsa_switch *ds)
|
|
|
|
{
|
|
|
|
mutex_lock(&dsa2_mutex);
|
|
|
|
_dsa_unregister_switch(ds);
|
|
|
|
mutex_unlock(&dsa2_mutex);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(dsa_unregister_switch);
|