[PATCH net-next 2/8] net: dsa: Make most functions take a dsa_port argument

From: Florian Fainelli
Date: Tue Jan 10 2017 - 15:13:19 EST

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In preparation for allowing platform data, and therefore no valid
device_node pointer, make most DSA functions takes a pointer to a
dsa_port structure whenever possible. While at it, introduce a
dsa_port_is_valid() helper function which checks whether port->dn is
NULL or not at the moment.

Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
---
net/dsa/dsa.c | 15 ++++++++------
net/dsa/dsa2.c | 61 +++++++++++++++++++++++++++++-------------------------
net/dsa/dsa_priv.h | 4 ++--
3 files changed, 44 insertions(+), 36 deletions(-)

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index fd532487dfdf..2306d1b87c83 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -110,8 +110,9 @@ dsa_switch_probe(struct device *parent, struct device *host_dev, int sw_addr,

/* basic switch operations **************************************************/
int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct device *dev,
- struct device_node *port_dn, int port)
+ struct dsa_port *dport, int port)
{
+ struct device_node *port_dn = dport->dn;
struct phy_device *phydev;
int ret, mode;

@@ -141,15 +142,15 @@ int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct device *dev,

static int dsa_cpu_dsa_setups(struct dsa_switch *ds, struct device *dev)
{
- struct device_node *port_dn;
+ struct dsa_port *dport;
int ret, port;

for (port = 0; port < DSA_MAX_PORTS; port++) {
if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
continue;

- port_dn = ds->ports[port].dn;
- ret = dsa_cpu_dsa_setup(ds, dev, port_dn, port);
+ dport = &ds->ports[port];
+ ret = dsa_cpu_dsa_setup(ds, dev, dport, port);
if (ret)
return ret;
}
@@ -366,8 +367,10 @@ dsa_switch_setup(struct dsa_switch_tree *dst, int index,
return ds;
}

-void dsa_cpu_dsa_destroy(struct device_node *port_dn)
+void dsa_cpu_dsa_destroy(struct dsa_port *port)
{
+ struct device_node *port_dn = port->dn;
+
if (of_phy_is_fixed_link(port_dn))
of_phy_deregister_fixed_link(port_dn);
}
@@ -393,7 +396,7 @@ static void dsa_switch_destroy(struct dsa_switch *ds)
for (port = 0; port < DSA_MAX_PORTS; port++) {
if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
continue;
- dsa_cpu_dsa_destroy(ds->ports[port].dn);
+ dsa_cpu_dsa_destroy(&ds->ports[port]);

/* Clearing a bit which is not set does no harm */
ds->cpu_port_mask |= ~(1 << port);
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index f0e3212ae9d5..91141ac6ec18 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -79,11 +79,16 @@ static void dsa_dst_del_ds(struct dsa_switch_tree *dst,
kref_put(&dst->refcount, dsa_free_dst);
}

-static bool dsa_port_is_dsa(struct device_node *port)
+static bool dsa_port_is_valid(struct dsa_port *port)
+{
+ return !!port->dn;
+}
+
+static bool dsa_port_is_dsa(struct dsa_port *port)
{
const char *name;

- name = of_get_property(port, "label", NULL);
+ name = of_get_property(port->dn, "label", NULL);
if (!name)
return false;

@@ -93,11 +98,11 @@ static bool dsa_port_is_dsa(struct device_node *port)
return false;
}

-static bool dsa_port_is_cpu(struct device_node *port)
+static bool dsa_port_is_cpu(struct dsa_port *port)
{
const char *name;

- name = of_get_property(port, "label", NULL);
+ name = of_get_property(port->dn, "label", NULL);
if (!name)
return false;

@@ -138,7 +143,7 @@ static struct dsa_switch *dsa_dst_find_port(struct dsa_switch_tree *dst,

static int dsa_port_complete(struct dsa_switch_tree *dst,
struct dsa_switch *src_ds,
- struct device_node *port,
+ struct dsa_port *port,
u32 src_port)
{
struct device_node *link;
@@ -146,7 +151,7 @@ static int dsa_port_complete(struct dsa_switch_tree *dst,
struct dsa_switch *dst_ds;

for (index = 0;; index++) {
- link = of_parse_phandle(port, "link", index);
+ link = of_parse_phandle(port->dn, "link", index);
if (!link)
break;

@@ -169,13 +174,13 @@ static int dsa_port_complete(struct dsa_switch_tree *dst,
*/
static int dsa_ds_complete(struct dsa_switch_tree *dst, struct dsa_switch *ds)
{
- struct device_node *port;
+ struct dsa_port *port;
u32 index;
int err;

for (index = 0; index < DSA_MAX_PORTS; index++) {
- port = ds->ports[index].dn;
- if (!port)
+ port = &ds->ports[index];
+ if (!dsa_port_is_valid(port))
continue;

if (!dsa_port_is_dsa(port))
@@ -215,7 +220,7 @@ static int dsa_dst_complete(struct dsa_switch_tree *dst)
return 0;
}

-static int dsa_dsa_port_apply(struct device_node *port, u32 index,
+static int dsa_dsa_port_apply(struct dsa_port *port, u32 index,
struct dsa_switch *ds)
{
int err;
@@ -230,13 +235,13 @@ static int dsa_dsa_port_apply(struct device_node *port, u32 index,
return 0;
}

-static void dsa_dsa_port_unapply(struct device_node *port, u32 index,
+static void dsa_dsa_port_unapply(struct dsa_port *port, u32 index,
struct dsa_switch *ds)
{
dsa_cpu_dsa_destroy(port);
}

-static int dsa_cpu_port_apply(struct device_node *port, u32 index,
+static int dsa_cpu_port_apply(struct dsa_port *port, u32 index,
struct dsa_switch *ds)
{
int err;
@@ -253,7 +258,7 @@ static int dsa_cpu_port_apply(struct device_node *port, u32 index,
return 0;
}

-static void dsa_cpu_port_unapply(struct device_node *port, u32 index,
+static void dsa_cpu_port_unapply(struct dsa_port *port, u32 index,
struct dsa_switch *ds)
{
dsa_cpu_dsa_destroy(port);
@@ -261,13 +266,13 @@ static void dsa_cpu_port_unapply(struct device_node *port, u32 index,

}

-static int dsa_user_port_apply(struct device_node *port, u32 index,
+static int dsa_user_port_apply(struct dsa_port *port, u32 index,
struct dsa_switch *ds)
{
const char *name;
int err;

- name = of_get_property(port, "label", NULL);
+ name = of_get_property(port->dn, "label", NULL);

err = dsa_slave_create(ds, ds->dev, index, name);
if (err) {
@@ -279,7 +284,7 @@ static int dsa_user_port_apply(struct device_node *port, u32 index,
return 0;
}

-static void dsa_user_port_unapply(struct device_node *port, u32 index,
+static void dsa_user_port_unapply(struct dsa_port *port, u32 index,
struct dsa_switch *ds)
{
if (ds->ports[index].netdev) {
@@ -291,7 +296,7 @@ static void dsa_user_port_unapply(struct device_node *port, u32 index,

static int dsa_ds_apply(struct dsa_switch_tree *dst, struct dsa_switch *ds)
{
- struct device_node *port;
+ struct dsa_port *port;
u32 index;
int err;

@@ -325,8 +330,8 @@ static int dsa_ds_apply(struct dsa_switch_tree *dst, struct dsa_switch *ds)
}

for (index = 0; index < DSA_MAX_PORTS; index++) {
- port = ds->ports[index].dn;
- if (!port)
+ port = &ds->ports[index];
+ if (!dsa_port_is_valid(port))
continue;

if (dsa_port_is_dsa(port)) {
@@ -353,12 +358,12 @@ static int dsa_ds_apply(struct dsa_switch_tree *dst, struct dsa_switch *ds)

static void dsa_ds_unapply(struct dsa_switch_tree *dst, struct dsa_switch *ds)
{
- struct device_node *port;
+ struct dsa_port *port;
u32 index;

for (index = 0; index < DSA_MAX_PORTS; index++) {
- port = ds->ports[index].dn;
- if (!port)
+ port = &ds->ports[index];
+ if (!dsa_port_is_valid(port))
continue;

if (dsa_port_is_dsa(port)) {
@@ -439,7 +444,7 @@ static void dsa_dst_unapply(struct dsa_switch_tree *dst)
dst->applied = false;
}

-static int dsa_cpu_parse(struct device_node *port, u32 index,
+static int dsa_cpu_parse(struct dsa_port *port, u32 index,
struct dsa_switch_tree *dst,
struct dsa_switch *ds)
{
@@ -447,7 +452,7 @@ static int dsa_cpu_parse(struct device_node *port, u32 index,
struct net_device *ethernet_dev;
struct device_node *ethernet;

- ethernet = of_parse_phandle(port, "ethernet", 0);
+ ethernet = of_parse_phandle(port->dn, "ethernet", 0);
if (!ethernet)
return -EINVAL;

@@ -480,13 +485,13 @@ static int dsa_cpu_parse(struct device_node *port, u32 index,

static int dsa_ds_parse(struct dsa_switch_tree *dst, struct dsa_switch *ds)
{
- struct device_node *port;
+ struct dsa_port *port;
u32 index;
int err;

for (index = 0; index < DSA_MAX_PORTS; index++) {
- port = ds->ports[index].dn;
- if (!port)
+ port = &ds->ports[index];
+ if (!dsa_port_is_valid(port))
continue;

if (dsa_port_is_cpu(port)) {
@@ -547,7 +552,7 @@ static int dsa_parse_ports_dn(struct device_node *ports, struct dsa_switch *ds)
* to have access to a correct value, just like what
* net/dsa/dsa.c::dsa_switch_setup_one does.
*/
- if (!dsa_port_is_cpu(port))
+ if (!dsa_port_is_cpu(&ds->ports[reg]))
ds->enabled_port_mask |= 1 << reg;
}

diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index 7e3385ec73f4..a015ec97c289 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -50,8 +50,8 @@ struct dsa_slave_priv {

/* dsa.c */
int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct device *dev,
- struct device_node *port_dn, int port);
-void dsa_cpu_dsa_destroy(struct device_node *port_dn);
+ struct dsa_port *dport, int port);
+void dsa_cpu_dsa_destroy(struct dsa_port *dport);
const struct dsa_device_ops *dsa_resolve_tag_protocol(int tag_protocol);
int dsa_cpu_port_ethtool_setup(struct dsa_switch *ds);
void dsa_cpu_port_ethtool_restore(struct dsa_switch *ds);
--
2.9.3

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