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Date: Wed, 25 Jan 2023 21:35:17 +0100
From: Christian Marangi <ansuelsmth@...il.com>
To: Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Christian Marangi <ansuelsmth@...il.com>,
"Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Mark Brown <broonie@...nel.org>
Subject: [net-next PATCH v3 2/2] net: dsa: qca8k: convert to regmap read/write API
Convert qca8k to regmap read/write bulk API. The mgmt eth can write up
to 32 bytes of data at times. Currently we use a custom function to do
it but regmap now supports declaration of read/write bulk even without a
bus.
Drop the custom function and rework the regmap function to this new
implementation.
Rework the qca8k_fdb_read/write function to use the new
regmap_bulk_read/write as the old qca8k_bulk_read/write are now dropped.
Cc: Mark Brown <broonie@...nel.org>
Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
---
v3:
- Split ATU define to diffetent patch
- Refresh with new finding for the mgmt fixes
v2:
- Move out of RFC.
- CC Mark Brown for first implementation of this kind of regmap stuff.
drivers/net/dsa/qca/qca8k-8xxx.c | 92 ++++++++++++++++++++++++------
drivers/net/dsa/qca/qca8k-common.c | 47 ++-------------
drivers/net/dsa/qca/qca8k.h | 3 -
3 files changed, 77 insertions(+), 65 deletions(-)
diff --git a/drivers/net/dsa/qca/qca8k-8xxx.c b/drivers/net/dsa/qca/qca8k-8xxx.c
index 2f224b166bbb..55df4479ea30 100644
--- a/drivers/net/dsa/qca/qca8k-8xxx.c
+++ b/drivers/net/dsa/qca/qca8k-8xxx.c
@@ -425,16 +425,12 @@ qca8k_regmap_update_bits_eth(struct qca8k_priv *priv, u32 reg, u32 mask, u32 wri
}
static int
-qca8k_regmap_read(void *ctx, uint32_t reg, uint32_t *val)
+qca8k_read_mii(struct qca8k_priv *priv, uint32_t reg, uint32_t *val)
{
- struct qca8k_priv *priv = (struct qca8k_priv *)ctx;
struct mii_bus *bus = priv->bus;
u16 r1, r2, page;
int ret;
- if (!qca8k_read_eth(priv, reg, val, sizeof(*val)))
- return 0;
-
qca8k_split_addr(reg, &r1, &r2, &page);
mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
@@ -451,16 +447,12 @@ qca8k_regmap_read(void *ctx, uint32_t reg, uint32_t *val)
}
static int
-qca8k_regmap_write(void *ctx, uint32_t reg, uint32_t val)
+qca8k_write_mii(struct qca8k_priv *priv, uint32_t reg, uint32_t val)
{
- struct qca8k_priv *priv = (struct qca8k_priv *)ctx;
struct mii_bus *bus = priv->bus;
u16 r1, r2, page;
int ret;
- if (!qca8k_write_eth(priv, reg, &val, sizeof(val)))
- return 0;
-
qca8k_split_addr(reg, &r1, &r2, &page);
mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
@@ -477,17 +469,14 @@ qca8k_regmap_write(void *ctx, uint32_t reg, uint32_t val)
}
static int
-qca8k_regmap_update_bits(void *ctx, uint32_t reg, uint32_t mask, uint32_t write_val)
+qca8k_regmap_update_bits_mii(struct qca8k_priv *priv, uint32_t reg,
+ uint32_t mask, uint32_t write_val)
{
- struct qca8k_priv *priv = (struct qca8k_priv *)ctx;
struct mii_bus *bus = priv->bus;
u16 r1, r2, page;
u32 val;
int ret;
- if (!qca8k_regmap_update_bits_eth(priv, reg, mask, write_val))
- return 0;
-
qca8k_split_addr(reg, &r1, &r2, &page);
mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
@@ -510,17 +499,84 @@ qca8k_regmap_update_bits(void *ctx, uint32_t reg, uint32_t mask, uint32_t write_
return ret;
}
+static int
+qca8k_bulk_read(void *ctx, const void *reg_buf, size_t reg_len,
+ void *val_buf, size_t val_len)
+{
+ int i, count = val_len / sizeof(u32), ret;
+ u32 reg = *(u32 *)reg_buf & U16_MAX;
+ struct qca8k_priv *priv = ctx;
+
+ if (priv->mgmt_master &&
+ !qca8k_read_eth(priv, reg, val_buf, val_len))
+ return 0;
+
+ /* loop count times and increment reg of 4 */
+ for (i = 0; i < count; i++, reg += sizeof(u32)) {
+ ret = qca8k_read_mii(priv, reg, val_buf + i);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int
+qca8k_bulk_gather_write(void *ctx, const void *reg_buf, size_t reg_len,
+ const void *val_buf, size_t val_len)
+{
+ int i, count = val_len / sizeof(u32), ret;
+ u32 reg = *(u32 *)reg_buf & U16_MAX;
+ struct qca8k_priv *priv = ctx;
+ u32 *val = (u32 *)val_buf;
+
+ if (priv->mgmt_master &&
+ !qca8k_write_eth(priv, reg, val, val_len))
+ return 0;
+
+ /* loop count times, increment reg of 4 and increment val ptr to
+ * the next value
+ */
+ for (i = 0; i < count; i++, reg += sizeof(u32), val++) {
+ ret = qca8k_write_mii(priv, reg, *val);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int
+qca8k_bulk_write(void *ctx, const void *data, size_t bytes)
+{
+ return qca8k_bulk_gather_write(ctx, data, sizeof(u16), data + sizeof(u16),
+ bytes - sizeof(u16));
+}
+
+static int
+qca8k_regmap_update_bits(void *ctx, uint32_t reg, uint32_t mask, uint32_t write_val)
+{
+ struct qca8k_priv *priv = ctx;
+
+ if (!qca8k_regmap_update_bits_eth(priv, reg, mask, write_val))
+ return 0;
+
+ return qca8k_regmap_update_bits_mii(priv, reg, mask, write_val);
+}
+
static struct regmap_config qca8k_regmap_config = {
.reg_bits = 16,
.val_bits = 32,
.reg_stride = 4,
.max_register = 0x16ac, /* end MIB - Port6 range */
- .reg_read = qca8k_regmap_read,
- .reg_write = qca8k_regmap_write,
+ .read = qca8k_bulk_read,
+ .write = qca8k_bulk_write,
.reg_update_bits = qca8k_regmap_update_bits,
.rd_table = &qca8k_readable_table,
.disable_locking = true, /* Locking is handled by qca8k read/write */
.cache_type = REGCACHE_NONE, /* Explicitly disable CACHE */
+ .max_raw_read = 32, /* mgmt eth can read/write up to 8 registers at time */
+ .max_raw_write = 32,
};
static int
@@ -2089,8 +2145,6 @@ static SIMPLE_DEV_PM_OPS(qca8k_pm_ops,
static const struct qca8k_info_ops qca8xxx_ops = {
.autocast_mib = qca8k_get_ethtool_stats_eth,
- .read_eth = qca8k_read_eth,
- .write_eth = qca8k_write_eth,
};
static const struct qca8k_match_data qca8327 = {
diff --git a/drivers/net/dsa/qca/qca8k-common.c b/drivers/net/dsa/qca/qca8k-common.c
index 2f82a8dae9ff..96773e432558 100644
--- a/drivers/net/dsa/qca/qca8k-common.c
+++ b/drivers/net/dsa/qca/qca8k-common.c
@@ -101,45 +101,6 @@ const struct regmap_access_table qca8k_readable_table = {
.n_yes_ranges = ARRAY_SIZE(qca8k_readable_ranges),
};
-/* TODO: remove these extra ops when we can support regmap bulk read/write */
-static int qca8k_bulk_read(struct qca8k_priv *priv, u32 reg, u32 *val, int len)
-{
- int i, count = len / sizeof(u32), ret;
-
- if (priv->mgmt_master && priv->info->ops->read_eth &&
- !priv->info->ops->read_eth(priv, reg, val, len))
- return 0;
-
- for (i = 0; i < count; i++) {
- ret = regmap_read(priv->regmap, reg + (i * 4), val + i);
- if (ret < 0)
- return ret;
- }
-
- return 0;
-}
-
-/* TODO: remove these extra ops when we can support regmap bulk read/write */
-static int qca8k_bulk_write(struct qca8k_priv *priv, u32 reg, u32 *val, int len)
-{
- int i, count = len / sizeof(u32), ret;
- u32 tmp;
-
- if (priv->mgmt_master && priv->info->ops->write_eth &&
- !priv->info->ops->write_eth(priv, reg, val, len))
- return 0;
-
- for (i = 0; i < count; i++) {
- tmp = val[i];
-
- ret = regmap_write(priv->regmap, reg + (i * 4), tmp);
- if (ret < 0)
- return ret;
- }
-
- return 0;
-}
-
static int qca8k_busy_wait(struct qca8k_priv *priv, u32 reg, u32 mask)
{
u32 val;
@@ -154,8 +115,8 @@ static int qca8k_fdb_read(struct qca8k_priv *priv, struct qca8k_fdb *fdb)
int ret;
/* load the ARL table into an array */
- ret = qca8k_bulk_read(priv, QCA8K_REG_ATU_DATA0, reg,
- QCA8K_ATU_TABLE_SIZE * sizeof(u32));
+ ret = regmap_bulk_read(priv->regmap, QCA8K_REG_ATU_DATA0, reg,
+ QCA8K_ATU_TABLE_SIZE);
if (ret)
return ret;
@@ -196,8 +157,8 @@ static void qca8k_fdb_write(struct qca8k_priv *priv, u16 vid, u8 port_mask,
reg[0] |= FIELD_PREP(QCA8K_ATU_ADDR5_MASK, mac[5]);
/* load the array into the ARL table */
- qca8k_bulk_write(priv, QCA8K_REG_ATU_DATA0, reg,
- QCA8K_ATU_TABLE_SIZE * sizeof(u32));
+ regmap_bulk_write(priv->regmap, QCA8K_REG_ATU_DATA0, reg,
+ QCA8K_ATU_TABLE_SIZE);
}
static int qca8k_fdb_access(struct qca8k_priv *priv, enum qca8k_fdb_cmd cmd,
diff --git a/drivers/net/dsa/qca/qca8k.h b/drivers/net/dsa/qca/qca8k.h
index 593a882ec43c..7996975d29d3 100644
--- a/drivers/net/dsa/qca/qca8k.h
+++ b/drivers/net/dsa/qca/qca8k.h
@@ -330,9 +330,6 @@ struct qca8k_priv;
struct qca8k_info_ops {
int (*autocast_mib)(struct dsa_switch *ds, int port, u64 *data);
- /* TODO: remove these extra ops when we can support regmap bulk read/write */
- int (*read_eth)(struct qca8k_priv *priv, u32 reg, u32 *val, int len);
- int (*write_eth)(struct qca8k_priv *priv, u32 reg, u32 *val, int len);
};
struct qca8k_match_data {
--
2.38.1
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