From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Crispin Subject: [RFC 3/4] net-next: dsa: Add support for multiple cpu ports. Date: Wed, 4 Jan 2017 08:38:03 +0100 Message-ID: <1483515484-21793-4-git-send-email-john@phrozen.org> References: <1483515484-21793-1-git-send-email-john@phrozen.org> Cc: netdev@vger.kernel.org, John Crispin To: Andrew Lunn , "David S. Miller" , Florian Fainelli , Vivien Didelot Return-path: Received: from nbd.name ([46.4.11.11]:60158 "EHLO nbd.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934379AbdADHiR (ORCPT ); Wed, 4 Jan 2017 02:38:17 -0500 In-Reply-To: <1483515484-21793-1-git-send-email-john@phrozen.org> Sender: netdev-owner@vger.kernel.org List-ID: From: Andrew Lunn Some boards have two CPU interfaces connected to the switch, e.g. WiFi access points, with 1 port labeled WAN, 4 ports labeled lan1-lan4, and two port connected to the SoC. This patch extends DSA to allows both CPU ports to be used. The "cpu" node in the DSA tree can now have a phandle to the host interface it connects to. Each user port can have a phandle to a cpu port which should be used for traffic between the port and the CPU. Thus simple load sharing over the two CPU ports can be achieved. Signed-off-by: John Crispin Signed-off-by: Andrew Lunn --- include/net/dsa.h | 21 ++++++++++++++++++++- net/dsa/dsa2.c | 36 ++++++++++++++++++++++++++++++------ net/dsa/dsa_priv.h | 5 +++++ net/dsa/slave.c | 27 ++++++++++++++++----------- 4 files changed, 71 insertions(+), 18 deletions(-) diff --git a/include/net/dsa.h b/include/net/dsa.h index b122196..f68180b 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -60,6 +60,8 @@ struct dsa_chip_data { */ char *port_names[DSA_MAX_PORTS]; struct device_node *port_dn[DSA_MAX_PORTS]; + struct net_device *port_ethernet[DSA_MAX_PORTS]; + int port_cpu[DSA_MAX_PORTS]; /* * An array of which element [a] indicates which port on this @@ -204,7 +206,7 @@ struct dsa_switch { static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) { - return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port); + return !!(ds->cpu_port_mask & (1 << p)); } static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) @@ -217,6 +219,11 @@ static inline bool dsa_is_port_initialized(struct dsa_switch *ds, int p) return ds->enabled_port_mask & (1 << p) && ds->ports[p].netdev; } +static inline bool dsa_is_upstream_port(struct dsa_switch *ds, int p) +{ + return dsa_is_cpu_port(ds, p) || dsa_is_dsa_port(ds, p); +} + static inline u8 dsa_upstream_port(struct dsa_switch *ds) { struct dsa_switch_tree *dst = ds->dst; @@ -233,6 +240,18 @@ static inline u8 dsa_upstream_port(struct dsa_switch *ds) return ds->rtable[dst->cpu_switch]; } +static inline u8 dsa_port_upstream_port(struct dsa_switch *ds, int port) +{ + /* + * If this port has a specific upstream cpu port, use it, + * otherwise use the switch default. + */ + if (ds->cd->port_cpu[port]) + return ds->cd->port_cpu[port]; + else + return dsa_upstream_port(ds); +} + struct switchdev_trans; struct switchdev_obj; struct switchdev_obj_port_fdb; diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c index 5fff951..1763cd4 100644 --- a/net/dsa/dsa2.c +++ b/net/dsa/dsa2.c @@ -258,7 +258,7 @@ static void dsa_cpu_port_unapply(struct device_node *port, u32 index, { dsa_cpu_dsa_destroy(port); ds->cpu_port_mask &= ~BIT(index); - + dev_put(ds->cd->port_ethernet[index]); } static int dsa_user_port_apply(struct device_node *port, u32 index, @@ -475,6 +475,28 @@ static int dsa_cpu_parse(struct device_node *port, u32 index, dst->rcv = dst->tag_ops->rcv; + dev_hold(ethernet_dev); + ds->cd->port_ethernet[index] = ethernet_dev; + + return 0; +} + +static int dsa_user_parse(struct device_node *port, u32 index, + struct dsa_switch *ds) +{ + struct device_node *cpu_port; + const unsigned int *cpu_port_reg; + int cpu_port_index; + + cpu_port = of_parse_phandle(port, "cpu", 0); + if (cpu_port) { + cpu_port_reg = of_get_property(cpu_port, "reg", NULL); + if (!cpu_port_reg) + return -EINVAL; + cpu_port_index = be32_to_cpup(cpu_port_reg); + ds->cd->port_cpu[index] = cpu_port_index; + } + return 0; } @@ -482,18 +504,20 @@ static int dsa_ds_parse(struct dsa_switch_tree *dst, struct dsa_switch *ds) { struct device_node *port; u32 index; - int err; + int err = 0; for (index = 0; index < DSA_MAX_PORTS; index++) { port = ds->ports[index].dn; if (!port) continue; - if (dsa_port_is_cpu(port)) { + if (dsa_port_is_cpu(port)) err = dsa_cpu_parse(port, index, dst, ds); - if (err) - return err; - } + else if (!dsa_port_is_dsa(port)) + err = dsa_user_parse(port, index, ds); + + if (err) + return err; } pr_info("DSA: switch %d %d parsed\n", dst->tree, ds->index); diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h index 6cfd738..7e1e62c 100644 --- a/net/dsa/dsa_priv.h +++ b/net/dsa/dsa_priv.h @@ -24,6 +24,11 @@ struct dsa_device_ops { struct dsa_slave_priv { struct sk_buff * (*xmit)(struct sk_buff *skb, struct net_device *dev); + /* + * Which host device do we used to send packets to the switch + * for this port. + */ + struct net_device *master; /* * Which switch this port is a part of, and the port index diff --git a/net/dsa/slave.c b/net/dsa/slave.c index ffd91969..260d4a9 100644 --- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -61,7 +61,7 @@ static int dsa_slave_get_iflink(const struct net_device *dev) { struct dsa_slave_priv *p = netdev_priv(dev); - return p->parent->dst->master_netdev->ifindex; + return p->master->ifindex; } static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p) @@ -96,7 +96,7 @@ static void dsa_port_set_stp_state(struct dsa_switch *ds, int port, u8 state) static int dsa_slave_open(struct net_device *dev) { struct dsa_slave_priv *p = netdev_priv(dev); - struct net_device *master = p->parent->dst->master_netdev; + struct net_device *master = p->master; struct dsa_switch *ds = p->parent; u8 stp_state = dsa_port_is_bridged(p) ? BR_STATE_BLOCKING : BR_STATE_FORWARDING; @@ -151,7 +151,7 @@ static int dsa_slave_open(struct net_device *dev) static int dsa_slave_close(struct net_device *dev) { struct dsa_slave_priv *p = netdev_priv(dev); - struct net_device *master = p->parent->dst->master_netdev; + struct net_device *master = p->master; struct dsa_switch *ds = p->parent; if (p->phy) @@ -178,7 +178,7 @@ static int dsa_slave_close(struct net_device *dev) static void dsa_slave_change_rx_flags(struct net_device *dev, int change) { struct dsa_slave_priv *p = netdev_priv(dev); - struct net_device *master = p->parent->dst->master_netdev; + struct net_device *master = p->master; if (change & IFF_ALLMULTI) dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1); @@ -189,7 +189,7 @@ static void dsa_slave_change_rx_flags(struct net_device *dev, int change) static void dsa_slave_set_rx_mode(struct net_device *dev) { struct dsa_slave_priv *p = netdev_priv(dev); - struct net_device *master = p->parent->dst->master_netdev; + struct net_device *master = p->master; dev_mc_sync(master, dev); dev_uc_sync(master, dev); @@ -198,7 +198,7 @@ static void dsa_slave_set_rx_mode(struct net_device *dev) static int dsa_slave_set_mac_address(struct net_device *dev, void *a) { struct dsa_slave_priv *p = netdev_priv(dev); - struct net_device *master = p->parent->dst->master_netdev; + struct net_device *master = p->master; struct sockaddr *addr = a; int err; @@ -633,7 +633,7 @@ static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) /* Queue the SKB for transmission on the parent interface, but * do not modify its EtherType */ - nskb->dev = p->parent->dst->master_netdev; + nskb->dev = p->master; dev_queue_xmit(nskb); return NETDEV_TX_OK; @@ -947,7 +947,7 @@ static int dsa_slave_netpoll_setup(struct net_device *dev, { struct dsa_slave_priv *p = netdev_priv(dev); struct dsa_switch *ds = p->parent; - struct net_device *master = ds->dst->master_netdev; + struct net_device *master = p->master; struct netpoll *netpoll; int err = 0; @@ -1247,12 +1247,16 @@ int dsa_slave_create(struct dsa_switch *ds, struct device *parent, struct net_device *master; struct net_device *slave_dev; struct dsa_slave_priv *p; + int port_cpu = ds->cd->port_cpu[port]; int ret; - master = ds->dst->master_netdev; - if (ds->master_netdev) + if (port_cpu && ds->cd->port_ethernet[port_cpu]) + master = ds->cd->port_ethernet[port_cpu]; + else if (ds->master_netdev) master = ds->master_netdev; - + else + master = ds->dst->master_netdev; + master->dsa_ptr = (void *)ds->dst; slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name, NET_NAME_UNKNOWN, ether_setup); if (slave_dev == NULL) @@ -1279,6 +1283,7 @@ int dsa_slave_create(struct dsa_switch *ds, struct device *parent, p->parent = ds; p->port = port; p->xmit = dst->tag_ops->xmit; + p->master = master; p->old_pause = -1; p->old_link = -1; -- 1.7.10.4