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Date: Mon, 6 Nov 2017 16:11:44 -0500
From: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
To: netdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, kernel@...oirfairelinux.com,
"David S. Miller" <davem@...emloft.net>,
Florian Fainelli <f.fainelli@...il.com>,
Andrew Lunn <andrew@...n.ch>,
Vivien Didelot <vivien.didelot@...oirfairelinux.com>
Subject: [PATCH net-next 02/11] net: dsa: setup and teardown default CPU port
The dsa_dst_parse function called just before dsa_dst_apply does not
parse the tree but does only one thing: it assigns the default CPU port
to dst->cpu_dp and to each user ports.
This patch simplifies this by calling a dsa_tree_setup_default_cpu
function at the beginning of dsa_dst_apply directly.
A dsa_port_is_user helper is added for convenience.
Signed-off-by: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
---
net/dsa/dsa2.c | 153 +++++++++++++++++++++++++--------------------------------
1 file changed, 68 insertions(+), 85 deletions(-)
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 283104e5ca6a..0a63a2119cd0 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -112,6 +112,11 @@ 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 bool dsa_ds_find_port_dn(struct dsa_switch *ds,
struct device_node *port)
{
@@ -218,6 +223,64 @@ static int dsa_dst_complete(struct dsa_switch_tree *dst)
return 0;
}
+static struct dsa_port *dsa_tree_find_first_cpu(struct dsa_switch_tree *dst)
+{
+ struct dsa_switch *ds;
+ struct dsa_port *dp;
+ int device, port;
+
+ for (device = 0; device < DSA_MAX_SWITCHES; device++) {
+ ds = dst->ds[device];
+ if (!ds)
+ continue;
+
+ for (port = 0; port < ds->num_ports; port++) {
+ dp = &ds->ports[port];
+
+ if (dsa_port_is_cpu(dp))
+ return dp;
+ }
+ }
+
+ return NULL;
+}
+
+static int dsa_tree_setup_default_cpu(struct dsa_switch_tree *dst)
+{
+ struct dsa_switch *ds;
+ struct dsa_port *dp;
+ int device, port;
+
+ /* DSA currently only supports a single CPU port */
+ dst->cpu_dp = dsa_tree_find_first_cpu(dst);
+ if (!dst->cpu_dp) {
+ pr_warn("Tree has no master device\n");
+ return -EINVAL;
+ }
+
+ /* Assign the default CPU port to all ports of the fabric */
+ for (device = 0; device < DSA_MAX_SWITCHES; device++) {
+ ds = dst->ds[device];
+ if (!ds)
+ continue;
+
+ for (port = 0; port < ds->num_ports; port++) {
+ dp = &ds->ports[port];
+
+ if (dsa_port_is_user(dp))
+ dp->cpu_dp = dst->cpu_dp;
+ }
+ }
+
+ return 0;
+}
+
+static void dsa_tree_teardown_default_cpu(struct dsa_switch_tree *dst)
+{
+ /* DSA currently only supports a single CPU port */
+ dst->cpu_dp = NULL;
+}
+
static int dsa_dsa_port_apply(struct dsa_port *port)
{
struct dsa_switch *ds = port->ds;
@@ -412,6 +475,10 @@ static int dsa_dst_apply(struct dsa_switch_tree *dst)
u32 index;
int err;
+ err = dsa_tree_setup_default_cpu(dst);
+ if (err)
+ return err;
+
for (index = 0; index < DSA_MAX_SWITCHES; index++) {
ds = dst->ds[index];
if (!ds)
@@ -464,7 +531,7 @@ static void dsa_dst_unapply(struct dsa_switch_tree *dst)
dsa_ds_unapply(dst, ds);
}
- dst->cpu_dp = NULL;
+ dsa_tree_teardown_default_cpu(dst);
pr_info("DSA: tree %d unapplied\n", dst->index);
dst->applied = false;
@@ -532,86 +599,6 @@ static int dsa_port_parse_cpu(struct dsa_port *dp, struct net_device *master)
return 0;
}
-static int dsa_cpu_parse(struct dsa_port *port, u32 index,
- struct dsa_switch_tree *dst,
- struct dsa_switch *ds)
-{
- if (!dst->cpu_dp)
- dst->cpu_dp = port;
-
- return 0;
-}
-
-static int dsa_ds_parse(struct dsa_switch_tree *dst, struct dsa_switch *ds)
-{
- struct dsa_port *port;
- u32 index;
- int err;
-
- for (index = 0; index < ds->num_ports; index++) {
- port = &ds->ports[index];
- if (!dsa_port_is_valid(port) ||
- dsa_port_is_dsa(port))
- continue;
-
- if (dsa_port_is_cpu(port)) {
- err = dsa_cpu_parse(port, index, dst, ds);
- if (err)
- return err;
- }
-
- }
-
- pr_info("DSA: switch %d %d parsed\n", dst->index, ds->index);
-
- return 0;
-}
-
-static int dsa_dst_parse(struct dsa_switch_tree *dst)
-{
- struct dsa_switch *ds;
- struct dsa_port *dp;
- u32 index;
- int port;
- 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;
- }
-
- if (!dst->cpu_dp) {
- pr_warn("Tree has no master device\n");
- return -EINVAL;
- }
-
- /* 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;
- }
- }
-
- pr_info("DSA: tree %d parsed\n", dst->index);
-
- 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);
@@ -810,10 +797,6 @@ static int _dsa_register_switch(struct dsa_switch *ds)
return -EINVAL;
}
- err = dsa_dst_parse(dst);
- if (err)
- goto out_del_dst;
-
err = dsa_dst_apply(dst);
if (err) {
dsa_dst_unapply(dst);
--
2.14.3
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