[PATCH net-next 1/2] net: dsa: store CPU switch structure in the tree

[PATCH net-next 1/2] net: dsa: store CPU switch structure in the tree

[Vivien Didelot]

Store a dsa_switch pointer to the CPU switch in the tree instead of only
its index. This avoids the need to initialize it to -1.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
---
 include/net/dsa.h | 8 ++++----
 net/dsa/dsa.c     | 7 +++----
 net/dsa/dsa2.c    | 5 ++---
 3 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 454667952d6d..82f7019f27f2 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -124,7 +124,7 @@ struct dsa_switch_tree {
 	/*
 	 * The switch and port to which the CPU is attached.
 	 */
-	s8			cpu_switch;
+	struct dsa_switch	*cpu_switch;
 	s8			cpu_port;
 
 	/*
@@ -211,7 +211,7 @@ 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 == ds->dst->cpu_switch && p == ds->dst->cpu_port);
 }
 
 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
@@ -234,10 +234,10 @@ static inline u8 dsa_upstream_port(struct dsa_switch *ds)
 	 * Else return the (DSA) port number that connects to the
 	 * switch that is one hop closer to the cpu.
 	 */
-	if (dst->cpu_switch == ds->index)
+	if (dst->cpu_switch == ds)
 		return dst->cpu_port;
 	else
-		return ds->rtable[dst->cpu_switch];
+		return ds->rtable[dst->cpu_switch->index];
 }
 
 struct switchdev_trans;
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 96d1544df518..cb42655ba7da 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -225,12 +225,12 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
 			continue;
 
 		if (!strcmp(name, "cpu")) {
-			if (dst->cpu_switch != -1) {
+			if (!dst->cpu_switch) {
 				netdev_err(dst->master_netdev,
 					   "multiple cpu ports?!\n");
 				return -EINVAL;
 			}
-			dst->cpu_switch = index;
+			dst->cpu_switch = ds;
 			dst->cpu_port = i;
 			ds->cpu_port_mask |= 1 << i;
 		} else if (!strcmp(name, "dsa")) {
@@ -254,7 +254,7 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
 	 * tagging protocol to the preferred tagging format of this
 	 * switch.
 	 */
-	if (dst->cpu_switch == index) {
+	if (dst->cpu_switch == ds) {
 		enum dsa_tag_protocol tag_protocol;
 
 		tag_protocol = ops->get_tag_protocol(ds);
@@ -757,7 +757,6 @@ static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev,
 
 	dst->pd = pd;
 	dst->master_netdev = dev;
-	dst->cpu_switch = -1;
 	dst->cpu_port = -1;
 
 	for (i = 0; i < pd->nr_chips; i++) {
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index a1f26fc0f585..a9bf28d9f41f 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -57,7 +57,6 @@ static struct dsa_switch_tree *dsa_add_dst(u32 tree)
 	if (!dst)
 		return NULL;
 	dst->tree = tree;
-	dst->cpu_switch = -1;
 	INIT_LIST_HEAD(&dst->list);
 	list_add_tail(&dsa_switch_trees, &dst->list);
 	kref_init(&dst->refcount);
@@ -456,8 +455,8 @@ static int dsa_cpu_parse(struct device_node *port, u32 index,
 	if (!dst->master_netdev)
 		dst->master_netdev = ethernet_dev;
 
-	if (dst->cpu_switch == -1) {
-		dst->cpu_switch = ds->index;
+	if (!dst->cpu_switch) {
+		dst->cpu_switch = ds;
 		dst->cpu_port = index;
 	}
 
-- 
2.11.0

[PATCH net-next 2/2] net: dsa: use cpu_switch instead of ds[0]

[Vivien Didelot]

Now that the DSA Ethernet switches are true Linux devices, the CPU
switch is not necessarily the first one. If its address is higher than
the second switch on the same MDIO bus, its index will be 1, not 0.

Avoid any confusion by using dst->cpu_switch instead of dst->ds[0].

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
---
 net/dsa/dsa.c         | 2 +-
 net/dsa/dsa2.c        | 8 ++++----
 net/dsa/slave.c       | 6 +++---
 net/dsa/tag_brcm.c    | 2 +-
 net/dsa/tag_qca.c     | 2 +-
 net/dsa/tag_trailer.c | 2 +-
 6 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index cb42655ba7da..87f2a9c9fa12 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -868,7 +868,7 @@ static void dsa_remove_dst(struct dsa_switch_tree *dst)
 			dsa_switch_destroy(ds);
 	}
 
-	dsa_cpu_port_ethtool_restore(dst->ds[0]);
+	dsa_cpu_port_ethtool_restore(dst->cpu_switch);
 
 	dev_put(dst->master_netdev);
 }
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index a9bf28d9f41f..634c6700a179 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -381,8 +381,8 @@ static int dsa_dst_apply(struct dsa_switch_tree *dst)
 			return err;
 	}
 
-	if (dst->ds[0]) {
-		err = dsa_cpu_port_ethtool_setup(dst->ds[0]);
+	if (dst->cpu_switch) {
+		err = dsa_cpu_port_ethtool_setup(dst->cpu_switch);
 		if (err)
 			return err;
 	}
@@ -426,8 +426,8 @@ static void dsa_dst_unapply(struct dsa_switch_tree *dst)
 		dsa_ds_unapply(dst, ds);
 	}
 
-	if (dst->ds[0])
-		dsa_cpu_port_ethtool_restore(dst->ds[0]);
+	if (dst->cpu_switch)
+		dsa_cpu_port_ethtool_restore(dst->cpu_switch);
 
 	pr_info("DSA: tree %d unapplied\n", dst->tree);
 	dst->applied = false;
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 0cdcaf526987..b8e58689a9a1 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -781,7 +781,7 @@ static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev,
 					   uint64_t *data)
 {
 	struct dsa_switch_tree *dst = dev->dsa_ptr;
-	struct dsa_switch *ds = dst->ds[0];
+	struct dsa_switch *ds = dst->cpu_switch;
 	s8 cpu_port = dst->cpu_port;
 	int count = 0;
 
@@ -798,7 +798,7 @@ static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev,
 static int dsa_cpu_port_get_sset_count(struct net_device *dev, int sset)
 {
 	struct dsa_switch_tree *dst = dev->dsa_ptr;
-	struct dsa_switch *ds = dst->ds[0];
+	struct dsa_switch *ds = dst->cpu_switch;
 	int count = 0;
 
 	if (dst->master_ethtool_ops.get_sset_count)
@@ -814,7 +814,7 @@ static void dsa_cpu_port_get_strings(struct net_device *dev,
 				     uint32_t stringset, uint8_t *data)
 {
 	struct dsa_switch_tree *dst = dev->dsa_ptr;
-	struct dsa_switch *ds = dst->ds[0];
+	struct dsa_switch *ds = dst->cpu_switch;
 	s8 cpu_port = dst->cpu_port;
 	int len = ETH_GSTRING_LEN;
 	int mcount = 0, count;
diff --git a/net/dsa/tag_brcm.c b/net/dsa/tag_brcm.c
index 21bffde6e4bf..af82927674e0 100644
--- a/net/dsa/tag_brcm.c
+++ b/net/dsa/tag_brcm.c
@@ -102,7 +102,7 @@ static int brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev,
 	if (unlikely(dst == NULL))
 		goto out_drop;
 
-	ds = dst->ds[0];
+	ds = dst->cpu_switch;
 
 	skb = skb_unshare(skb, GFP_ATOMIC);
 	if (skb == NULL)
diff --git a/net/dsa/tag_qca.c b/net/dsa/tag_qca.c
index 0c90cacee7aa..736ca8e8c31e 100644
--- a/net/dsa/tag_qca.c
+++ b/net/dsa/tag_qca.c
@@ -104,7 +104,7 @@ static int qca_tag_rcv(struct sk_buff *skb, struct net_device *dev,
 	/* This protocol doesn't support cascading multiple switches so it's
 	 * safe to assume the switch is first in the tree
 	 */
-	ds = dst->ds[0];
+	ds = dst->cpu_switch;
 	if (!ds)
 		goto out_drop;
 
diff --git a/net/dsa/tag_trailer.c b/net/dsa/tag_trailer.c
index 5e3903eb1afa..271128a2dc64 100644
--- a/net/dsa/tag_trailer.c
+++ b/net/dsa/tag_trailer.c
@@ -67,7 +67,7 @@ static int trailer_rcv(struct sk_buff *skb, struct net_device *dev,
 
 	if (unlikely(dst == NULL))
 		goto out_drop;
-	ds = dst->ds[0];
+	ds = dst->cpu_switch;
 
 	skb = skb_unshare(skb, GFP_ATOMIC);
 	if (skb == NULL)
-- 
2.11.0

Re: [PATCH net-next 1/2] net: dsa: store CPU switch structure in the tree

[Andrew Lunn]

On Tue, Jan 17, 2017 at 08:41:38PM -0500, Vivien Didelot wrote:
> Store a dsa_switch pointer to the CPU switch in the tree instead of only
> its index. This avoids the need to initialize it to -1.

Hi Vivien

A cover note would be nice.

I expect these patches are going to clash with Florians platform
device patches, but they are on hold for a while. Also John's rework
of the multi-cpu ports, but that has gone quite.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew

> 
> Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
> ---
>  include/net/dsa.h | 8 ++++----
>  net/dsa/dsa.c     | 7 +++----
>  net/dsa/dsa2.c    | 5 ++---
>  3 files changed, 9 insertions(+), 11 deletions(-)
> 
> diff --git a/include/net/dsa.h b/include/net/dsa.h
> index 454667952d6d..82f7019f27f2 100644
> --- a/include/net/dsa.h
> +++ b/include/net/dsa.h
> @@ -124,7 +124,7 @@ struct dsa_switch_tree {
>  	/*
>  	 * The switch and port to which the CPU is attached.
>  	 */
> -	s8			cpu_switch;
> +	struct dsa_switch	*cpu_switch;
>  	s8			cpu_port;
>  
>  	/*
> @@ -211,7 +211,7 @@ 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 == ds->dst->cpu_switch && p == ds->dst->cpu_port);
>  }
>  
>  static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
> @@ -234,10 +234,10 @@ static inline u8 dsa_upstream_port(struct dsa_switch *ds)
>  	 * Else return the (DSA) port number that connects to the
>  	 * switch that is one hop closer to the cpu.
>  	 */
> -	if (dst->cpu_switch == ds->index)
> +	if (dst->cpu_switch == ds)
>  		return dst->cpu_port;
>  	else
> -		return ds->rtable[dst->cpu_switch];
> +		return ds->rtable[dst->cpu_switch->index];
>  }
>  
>  struct switchdev_trans;
> diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
> index 96d1544df518..cb42655ba7da 100644
> --- a/net/dsa/dsa.c
> +++ b/net/dsa/dsa.c
> @@ -225,12 +225,12 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
>  			continue;
>  
>  		if (!strcmp(name, "cpu")) {
> -			if (dst->cpu_switch != -1) {
> +			if (!dst->cpu_switch) {
>  				netdev_err(dst->master_netdev,
>  					   "multiple cpu ports?!\n");
>  				return -EINVAL;
>  			}
> -			dst->cpu_switch = index;
> +			dst->cpu_switch = ds;
>  			dst->cpu_port = i;
>  			ds->cpu_port_mask |= 1 << i;
>  		} else if (!strcmp(name, "dsa")) {
> @@ -254,7 +254,7 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
>  	 * tagging protocol to the preferred tagging format of this
>  	 * switch.
>  	 */
> -	if (dst->cpu_switch == index) {
> +	if (dst->cpu_switch == ds) {
>  		enum dsa_tag_protocol tag_protocol;
>  
>  		tag_protocol = ops->get_tag_protocol(ds);
> @@ -757,7 +757,6 @@ static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev,
>  
>  	dst->pd = pd;
>  	dst->master_netdev = dev;
> -	dst->cpu_switch = -1;
>  	dst->cpu_port = -1;
>  
>  	for (i = 0; i < pd->nr_chips; i++) {
> diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
> index a1f26fc0f585..a9bf28d9f41f 100644
> --- a/net/dsa/dsa2.c
> +++ b/net/dsa/dsa2.c
> @@ -57,7 +57,6 @@ static struct dsa_switch_tree *dsa_add_dst(u32 tree)
>  	if (!dst)
>  		return NULL;
>  	dst->tree = tree;
> -	dst->cpu_switch = -1;
>  	INIT_LIST_HEAD(&dst->list);
>  	list_add_tail(&dsa_switch_trees, &dst->list);
>  	kref_init(&dst->refcount);
> @@ -456,8 +455,8 @@ static int dsa_cpu_parse(struct device_node *port, u32 index,
>  	if (!dst->master_netdev)
>  		dst->master_netdev = ethernet_dev;
>  
> -	if (dst->cpu_switch == -1) {
> -		dst->cpu_switch = ds->index;
> +	if (!dst->cpu_switch) {
> +		dst->cpu_switch = ds;
>  		dst->cpu_port = index;
>  	}
>  
> -- 
> 2.11.0
> 

Re: [PATCH net-next 2/2] net: dsa: use cpu_switch instead of ds[0]

[Andrew Lunn]

On Tue, Jan 17, 2017 at 08:41:39PM -0500, Vivien Didelot wrote:
> Now that the DSA Ethernet switches are true Linux devices, the CPU
> switch is not necessarily the first one. If its address is higher than
> the second switch on the same MDIO bus, its index will be 1, not 0.
> 
> Avoid any confusion by using dst->cpu_switch instead of dst->ds[0].
> 
> Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew

Re: [PATCH net-next 1/2] net: dsa: store CPU switch structure in the tree

[Florian Fainelli]

On 01/17/2017 05:41 PM, Vivien Didelot wrote:
> Store a dsa_switch pointer to the CPU switch in the tree instead of only
> its index. This avoids the need to initialize it to -1.
> 
> Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
-- 
Florian

Re: [PATCH net-next 2/2] net: dsa: use cpu_switch instead of ds[0]

[Florian Fainelli]

On 01/17/2017 05:41 PM, Vivien Didelot wrote:
> Now that the DSA Ethernet switches are true Linux devices, the CPU
> switch is not necessarily the first one. If its address is higher than
> the second switch on the same MDIO bus, its index will be 1, not 0.
> 
> Avoid any confusion by using dst->cpu_switch instead of dst->ds[0].
> 
> Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
-- 
Florian

Re: [PATCH net-next 2/2] net: dsa: use cpu_switch instead of ds[0]

[Florian Fainelli]

On 01/18/2017 04:50 AM, Andrew Lunn wrote:
> On Tue, Jan 17, 2017 at 08:41:39PM -0500, Vivien Didelot wrote:
>> Now that the DSA Ethernet switches are true Linux devices, the CPU
>> switch is not necessarily the first one. If its address is higher than
>> the second switch on the same MDIO bus, its index will be 1, not 0.
>>
>> Avoid any confusion by using dst->cpu_switch instead of dst->ds[0].
>>
>> Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
> 
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
-- 
Florian

Re: [PATCH net-next 1/2] net: dsa: store CPU switch structure in the tree

[David Miller]

From: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Date: Tue, 17 Jan 2017 20:41:38 -0500

> Store a dsa_switch pointer to the CPU switch in the tree instead of only
> its index. This avoids the need to initialize it to -1.
> 
> Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>

Applied.

Re: [PATCH net-next 2/2] net: dsa: use cpu_switch instead of ds[0]

[David Miller]

From: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Date: Tue, 17 Jan 2017 20:41:39 -0500

> Now that the DSA Ethernet switches are true Linux devices, the CPU
> switch is not necessarily the first one. If its address is higher than
> the second switch on the same MDIO bus, its index will be 1, not 0.
> 
> Avoid any confusion by using dst->cpu_switch instead of dst->ds[0].
> 
> Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>

Applied.