[PATCH net-next 06/11] net: dsa: sja1105: make dp->priv point directly to sja1105_tagger_data

Vladimir Oltean
2021-12-08T20:06:12Z

The design of the sja1105 tagger dp->priv is that each port has a
separate struct sja1105_port, and the sp->data pointer points to a
common struct sja1105_tagger_data.

We have removed all per-port members accessible by the tagger, and now
only struct sja1105_tagger_data remains. Make dp->priv point directly to
this.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
drivers/net/dsa/sja1105/sja1105.h | 1 -
drivers/net/dsa/sja1105/sja1105_main.c | 16 +++------
drivers/net/dsa/sja1105/sja1105_ptp.c | 16 +++++----
include/linux/dsa/sja1105.h | 8 +----
net/dsa/tag_sja1105.c | 48 ++++++++++++++------------
5 files changed, 39 insertions(+), 50 deletions(-)

diff --git a/drivers/net/dsa/sja1105/sja1105.h b/drivers/net/dsa/sja1105/sja1105.h
index b0612c763ec0..6ef6fb4f30e6 100644
--- a/drivers/net/dsa/sja1105/sja1105.h
+++ b/drivers/net/dsa/sja1105/sja1105.h
@@ -257,7 +257,6 @@ struct sja1105_private {
u16 bridge_pvid[SJA1105_MAX_NUM_PORTS];
u16 tag_8021q_pvid[SJA1105_MAX_NUM_PORTS];
struct sja1105_flow_block flow_block;
- struct sja1105_port ports[SJA1105_MAX_NUM_PORTS];
/* Serializes transmission of management frames so that
* the switch doesn't confuse them with one another.
*/
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index 5c486bd2bc61..4f3350df7f4d 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -3017,7 +3017,8 @@ static int sja1105_setup_ports(struct sja1105_private *priv)
struct sja1105_tagger_data *tagger_data = &priv->tagger_data;
struct dsa_switch *ds = priv->ds;
struct kthread_worker *worker;
- int port, rc;
+ struct dsa_port *dp;
+ int rc;

worker = kthread_create_worker(0, "dsa%d:%d_xmit", ds->dst->index,
ds->index);
@@ -3031,17 +3032,8 @@ static int sja1105_setup_ports(struct sja1105_private *priv)
tagger_data->xmit_worker = worker;
tagger_data->xmit_work_fn = sja1105_port_deferred_xmit;

- /* Connections between dsa_port and sja1105_port */
- for (port = 0; port < ds->num_ports; port++) {
- struct sja1105_port *sp = &priv->ports[port];
- struct dsa_port *dp = dsa_to_port(ds, port);
-
- if (!dsa_port_is_user(dp))
- continue;
-
- dp->priv = sp;
- sp->data = tagger_data;
- }
+ dsa_switch_for_each_user_port(dp, ds)
+ dp->priv = tagger_data;

return 0;
}
diff --git a/drivers/net/dsa/sja1105/sja1105_ptp.c b/drivers/net/dsa/sja1105/sja1105_ptp.c
index ea41cee805b0..9077067328c2 100644
--- a/drivers/net/dsa/sja1105/sja1105_ptp.c
+++ b/drivers/net/dsa/sja1105/sja1105_ptp.c
@@ -461,22 +461,24 @@ void sja1110_txtstamp(struct dsa_switch *ds, int port, struct sk_buff *skb)
{
struct sk_buff *clone = SJA1105_SKB_CB(skb)->clone;
struct sja1105_private *priv = ds->priv;
- struct sja1105_port *sp = &priv->ports[port];
+ struct sja1105_tagger_data *tagger_data;
u8 ts_id;

+ tagger_data = &priv->tagger_data;
+
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;

- spin_lock(&sp->data->meta_lock);
+ spin_lock(&tagger_data->meta_lock);

- ts_id = sp->data->ts_id;
+ ts_id = tagger_data->ts_id;
/* Deal automatically with 8-bit wraparound */
- sp->data->ts_id++;
+ tagger_data->ts_id++;

SJA1105_SKB_CB(clone)->ts_id = ts_id;

- spin_unlock(&sp->data->meta_lock);
+ spin_unlock(&tagger_data->meta_lock);

- skb_queue_tail(&sp->data->skb_txtstamp_queue, clone);
+ skb_queue_tail(&tagger_data->skb_txtstamp_queue, clone);
}

/* Called from dsa_skb_tx_timestamp. This callback is just to clone
@@ -488,7 +490,7 @@ void sja1105_port_txtstamp(struct dsa_switch *ds, int port, struct sk_buff *skb)
struct sja1105_private *priv = ds->priv;
struct sk_buff *clone;

- if (!(priv->hwts_tx_en & BIT(port))
+ if (!(priv->hwts_tx_en & BIT(port)))
return;

clone = skb_clone_sk(skb);
diff --git a/include/linux/dsa/sja1105.h b/include/linux/dsa/sja1105.h
index 32a8a1344cf6..1dda9cce85d9 100644
--- a/include/linux/dsa/sja1105.h
+++ b/include/linux/dsa/sja1105.h
@@ -43,9 +43,7 @@ struct sja1105_deferred_xmit_work {
struct kthread_work work;
};

-/* Global tagger data: each struct sja1105_port has a reference to
- * the structure defined in struct sja1105_private.
- */
+/* Global tagger data */
struct sja1105_tagger_data {
struct sk_buff *stampable_skb;
/* Protects concurrent access to the meta state machine
@@ -72,10 +70,6 @@ struct sja1105_skb_cb {
#define SJA1105_SKB_CB(skb) \
((struct sja1105_skb_cb *)((skb)->cb))

-struct sja1105_port {
- struct sja1105_tagger_data *data;
-};
-
/* Timestamps are in units of 8 ns clock ticks (equivalent to
* a fixed 125 MHz clock).
*/
diff --git a/net/dsa/tag_sja1105.c b/net/dsa/tag_sja1105.c
index 7008952b6c1d..fc2af71b965c 100644
--- a/net/dsa/tag_sja1105.c
+++ b/net/dsa/tag_sja1105.c
@@ -125,13 +125,13 @@ static inline bool sja1105_is_meta_frame(const struct sk_buff *skb)
static struct sk_buff *sja1105_defer_xmit(struct dsa_port *dp,
struct sk_buff *skb)
{
+ struct sja1105_tagger_data *tagger_data = dp->priv;
void (*xmit_work_fn)(struct kthread_work *work);
struct sja1105_deferred_xmit_work *xmit_work;
- struct sja1105_port *sp = dp->priv;
struct kthread_worker *xmit_worker;

- xmit_work_fn = sp->data->xmit_work_fn;
- xmit_worker = sp->data->xmit_worker;
+ xmit_work_fn = tagger_data->xmit_work_fn;
+ xmit_worker = tagger_data->xmit_worker;

if (!xmit_work_fn || !xmit_worker)
return NULL;
@@ -368,32 +368,32 @@ static struct sk_buff
*/
if (is_link_local) {
struct dsa_port *dp = dsa_slave_to_port(skb->dev);
- struct sja1105_port *sp = dp->priv;
+ struct sja1105_tagger_data *tagger_data = dp->priv;

if (unlikely(!dsa_port_is_sja1105(dp)))
return skb;

- if (!test_bit(SJA1105_HWTS_RX_EN, &sp->data->state))
+ if (!test_bit(SJA1105_HWTS_RX_EN, &tagger_data->state))
/* Do normal processing. */
return skb;

- spin_lock(&sp->data->meta_lock);
+ spin_lock(&tagger_data->meta_lock);
/* Was this a link-local frame instead of the meta
* that we were expecting?
*/
- if (sp->data->stampable_skb) {
+ if (tagger_data->stampable_skb) {
dev_err_ratelimited(dp->ds->dev,
"Expected meta frame, is %12llx "
"in the DSA master multicast filter?\n",
SJA1105_META_DMAC);
- kfree_skb(sp->data->stampable_skb);
+ kfree_skb(tagger_data->stampable_skb);
}

/* Hold a reference to avoid dsa_switch_rcv
* from freeing the skb.
*/
- sp->data->stampable_skb = skb_get(skb);
- spin_unlock(&sp->data->meta_lock);
+ tagger_data->stampable_skb = skb_get(skb);
+ spin_unlock(&tagger_data->meta_lock);

/* Tell DSA we got nothing */
return NULL;
@@ -406,7 +406,7 @@ static struct sk_buff
*/
} else if (is_meta) {
struct dsa_port *dp = dsa_slave_to_port(skb->dev);
- struct sja1105_port *sp = dp->priv;
+ struct sja1105_tagger_data *tagger_data = dp->priv;
struct sk_buff *stampable_skb;

if (unlikely(!dsa_port_is_sja1105(dp)))
@@ -415,13 +415,13 @@ static struct sk_buff
/* Drop the meta frame if we're not in the right state
* to process it.
*/
- if (!test_bit(SJA1105_HWTS_RX_EN, &sp->data->state))
+ if (!test_bit(SJA1105_HWTS_RX_EN, &tagger_data->state))
return NULL;

- spin_lock(&sp->data->meta_lock);
+ spin_lock(&tagger_data->meta_lock);

- stampable_skb = sp->data->stampable_skb;
- sp->data->stampable_skb = NULL;
+ stampable_skb = tagger_data->stampable_skb;
+ tagger_data->stampable_skb = NULL;

/* Was this a meta frame instead of the link-local
* that we were expecting?
@@ -429,14 +429,14 @@ static struct sk_buff
if (!stampable_skb) {
dev_err_ratelimited(dp->ds->dev,
"Unexpected meta frame\n");
- spin_unlock(&sp->data->meta_lock);
+ spin_unlock(&tagger_data->meta_lock);
return NULL;
}

if (stampable_skb->dev != skb->dev) {
dev_err_ratelimited(dp->ds->dev,
"Meta frame on wrong port\n");
- spin_unlock(&sp->data->meta_lock);
+ spin_unlock(&tagger_data->meta_lock);
return NULL;
}

@@ -447,7 +447,7 @@ static struct sk_buff
skb = stampable_skb;
sja1105_transfer_meta(skb, meta);

- spin_unlock(&sp->data->meta_lock);
+ spin_unlock(&tagger_data->meta_lock);
}

return skb;
@@ -545,8 +545,8 @@ static void sja1110_process_meta_tstamp(struct dsa_switch *ds, int port,
{
struct sk_buff *skb, *skb_tmp, *skb_match = NULL;
struct dsa_port *dp = dsa_to_port(ds, port);
+ struct sja1105_tagger_data *tagger_data;
struct skb_shared_hwtstamps shwt = {0};
- struct sja1105_port *sp = dp->priv;

if (!dsa_port_is_sja1105(dp))
return;
@@ -555,19 +555,21 @@ static void sja1110_process_meta_tstamp(struct dsa_switch *ds, int port,
if (dir == SJA1110_META_TSTAMP_RX)
return;

- spin_lock(&sp->data->skb_txtstamp_queue.lock);
+ tagger_data = dp->priv;

- skb_queue_walk_safe(&sp->data->skb_txtstamp_queue, skb, skb_tmp) {
+ spin_lock(&tagger_data->skb_txtstamp_queue.lock);
+
+ skb_queue_walk_safe(&tagger_data->skb_txtstamp_queue, skb, skb_tmp) {
if (SJA1105_SKB_CB(skb)->ts_id != ts_id)
continue;

- __skb_unlink(skb, &sp->data->skb_txtstamp_queue);
+ __skb_unlink(skb, &tagger_data->skb_txtstamp_queue);
skb_match = skb;

break;
}

- spin_unlock(&sp->data->skb_txtstamp_queue.lock);
+ spin_unlock(&tagger_data->skb_txtstamp_queue.lock);

if (WARN_ON(!skb_match))
return;
--
2.25.1