[net-next PATCH v5 01/14] net: dsa: qca8k: cache match data to speed up access

Christian Marangi
2022-07-27T11:35:46Z

Using of_device_get_match_data is expensive. Cache match data to speed
up access and rework user of match data to use the new cached value.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
drivers/net/dsa/qca/qca8k.c | 35 +++++++++++------------------------
drivers/net/dsa/qca/qca8k.h | 1 +
2 files changed, 12 insertions(+), 24 deletions(-)

diff --git a/drivers/net/dsa/qca/qca8k.c b/drivers/net/dsa/qca/qca8k.c
index 1cbb05b0323f..64524a721221 100644
--- a/drivers/net/dsa/qca/qca8k.c
+++ b/drivers/net/dsa/qca/qca8k.c
@@ -1462,8 +1462,8 @@ static int qca8k_find_cpu_port(struct dsa_switch *ds)
static int
qca8k_setup_of_pws_reg(struct qca8k_priv *priv)
{
+ const struct qca8k_match_data *data = priv->info;
struct device_node *node = priv->dev->of_node;
- const struct qca8k_match_data *data;
u32 val = 0;
int ret;

@@ -1472,8 +1472,6 @@ qca8k_setup_of_pws_reg(struct qca8k_priv *priv)
* Should be applied by default but we set this just to make sure.
*/
if (priv->switch_id == QCA8K_ID_QCA8327) {
- data = of_device_get_match_data(priv->dev);
-
/* Set the correct package of 148 pin for QCA8327 */
if (data->reduced_package)
val |= QCA8327_PWS_PACKAGE148_EN;
@@ -1996,23 +1994,19 @@ static void qca8k_setup_pcs(struct qca8k_priv *priv, struct qca8k_pcs *qpcs,
static void
qca8k_get_strings(struct dsa_switch *ds, int port, u32 stringset, uint8_t *data)
{
- const struct qca8k_match_data *match_data;
struct qca8k_priv *priv = ds->priv;
int i;

if (stringset != ETH_SS_STATS)
return;

- match_data = of_device_get_match_data(priv->dev);
-
- for (i = 0; i < match_data->mib_count; i++)
+ for (i = 0; i < priv->info->mib_count; i++)
strncpy(data + i * ETH_GSTRING_LEN, ar8327_mib[i].name,
ETH_GSTRING_LEN);
}

static void qca8k_mib_autocast_handler(struct dsa_switch *ds, struct sk_buff *skb)
{
- const struct qca8k_match_data *match_data;
struct qca8k_mib_eth_data *mib_eth_data;
struct qca8k_priv *priv = ds->priv;
const struct qca8k_mib_desc *mib;
@@ -2031,10 +2025,9 @@ static void qca8k_mib_autocast_handler(struct dsa_switch *ds, struct sk_buff *sk
if (port != mib_eth_data->req_port)
goto exit;

- match_data = device_get_match_data(priv->dev);
data = mib_eth_data->data;

- for (i = 0; i < match_data->mib_count; i++) {
+ for (i = 0; i < priv->info->mib_count; i++) {
mib = &ar8327_mib[i];

/* First 3 mib are present in the skb head */
@@ -2106,7 +2099,6 @@ qca8k_get_ethtool_stats(struct dsa_switch *ds, int port,
uint64_t *data)
{
struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
- const struct qca8k_match_data *match_data;
const struct qca8k_mib_desc *mib;
u32 reg, i, val;
u32 hi = 0;
@@ -2116,9 +2108,7 @@ qca8k_get_ethtool_stats(struct dsa_switch *ds, int port,
qca8k_get_ethtool_stats_eth(ds, port, data) > 0)
return;

- match_data = of_device_get_match_data(priv->dev);
-
- for (i = 0; i < match_data->mib_count; i++) {
+ for (i = 0; i < priv->info->mib_count; i++) {
mib = &ar8327_mib[i];
reg = QCA8K_PORT_MIB_COUNTER(port) + mib->offset;

@@ -2141,15 +2131,12 @@ qca8k_get_ethtool_stats(struct dsa_switch *ds, int port,
static int
qca8k_get_sset_count(struct dsa_switch *ds, int port, int sset)
{
- const struct qca8k_match_data *match_data;
struct qca8k_priv *priv = ds->priv;

if (sset != ETH_SS_STATS)
return 0;

- match_data = of_device_get_match_data(priv->dev);
-
- return match_data->mib_count;
+ return priv->info->mib_count;
}

static int
@@ -3093,14 +3080,11 @@ static const struct dsa_switch_ops qca8k_switch_ops = {

static int qca8k_read_switch_id(struct qca8k_priv *priv)
{
- const struct qca8k_match_data *data;
u32 val;
u8 id;
int ret;

- /* get the switches ID from the compatible */
- data = of_device_get_match_data(priv->dev);
- if (!data)
+ if (!priv->info)
return -ENODEV;

ret = qca8k_read(priv, QCA8K_REG_MASK_CTRL, &val);
@@ -3108,8 +3092,10 @@ static int qca8k_read_switch_id(struct qca8k_priv *priv)
return -ENODEV;

id = QCA8K_MASK_CTRL_DEVICE_ID(val);
- if (id != data->id) {
- dev_err(priv->dev, "Switch id detected %x but expected %x", id, data->id);
+ if (id != priv->info->id) {
+ dev_err(priv->dev,
+ "Switch id detected %x but expected %x",
+ id, priv->info->id);
return -ENODEV;
}

@@ -3134,6 +3120,7 @@ qca8k_sw_probe(struct mdio_device *mdiodev)
if (!priv)
return -ENOMEM;

+ priv->info = of_device_get_match_data(priv->dev);
priv->bus = mdiodev->bus;
priv->dev = &mdiodev->dev;

diff --git a/drivers/net/dsa/qca/qca8k.h b/drivers/net/dsa/qca/qca8k.h
index ec58d0e80a70..0b990b46890a 100644
--- a/drivers/net/dsa/qca/qca8k.h
+++ b/drivers/net/dsa/qca/qca8k.h
@@ -401,6 +401,7 @@ struct qca8k_priv {
struct qca8k_mdio_cache mdio_cache;
struct qca8k_pcs pcs_port_0;
struct qca8k_pcs pcs_port_6;
+ const struct qca8k_match_data *info;
};

struct qca8k_mib_desc {
--
2.36.1