[Patch net-next v14 04/13] net: dsa: microchip: generic access to ksz9477 static and reserved table

From: Arun Ramadoss
Date: Thu Jun 30 2022 - 06:23:12 EST

Next message: Arun Ramadoss: "[Patch net-next v14 08/13] net: dsa: microchip: lan937x: register mdio-bus"
Previous message: Nikolay Aleksandrov: "Re: [PATCH net-next v1 1/1] net: bridge: ensure that multicast packets cannot unlock a locked port"
In reply to: Arun Ramadoss: "[Patch net-next v14 05/13] net: dsa: microchip: add DSA support for microchip LAN937x"
Next in thread: Arun Ramadoss: "[Patch net-next v14 08/13] net: dsa: microchip: lan937x: register mdio-bus"
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The ksz9477 and lan937x has few difference in the static and reserved
table register 0x041C. For the ksz9477 if the bit 0 is 1 - read
operation and 0 - write operation. But for lan937x bit 1:0 used for
selecting the read/write operation, 01 - write and 10 - read.
To use ksz9477 mdb add/del and enable_stp_addr for the lan937x, masks &
shifts are introduced for ksz9477 & lan937x in ksz_common.c. Then
updated the function with masks & shifts based on the switch instead of
hard coding it.

Signed-off-by: Arun Ramadoss <arun.ramadoss@xxxxxxxxxxxxx>
---
drivers/net/dsa/microchip/ksz9477.c | 27 ++++++++++++++-----
drivers/net/dsa/microchip/ksz9477_reg.h | 3 ---
drivers/net/dsa/microchip/ksz_common.c | 35 +++++++++++++++++++++++++
drivers/net/dsa/microchip/ksz_common.h | 3 +++
4 files changed, 58 insertions(+), 10 deletions(-)

diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index 0e808d27124c..6453642fa14c 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -644,11 +644,16 @@ int ksz9477_mdb_add(struct ksz_device *dev, int port,
const struct switchdev_obj_port_mdb *mdb, struct dsa_db db)
{
u32 static_table[4];
+ const u8 *shifts;
+ const u32 *masks;
u32 data;
int index;
u32 mac_hi, mac_lo;
int err = 0;

+ shifts = dev->info->shifts;
+ masks = dev->info->masks;
+
mac_hi = ((mdb->addr[0] << 8) | mdb->addr[1]);
mac_lo = ((mdb->addr[2] << 24) | (mdb->addr[3] << 16));
mac_lo |= ((mdb->addr[4] << 8) | mdb->addr[5]);
@@ -657,8 +662,8 @@ int ksz9477_mdb_add(struct ksz_device *dev, int port,

for (index = 0; index < dev->info->num_statics; index++) {
/* find empty slot first */
- data = (index << ALU_STAT_INDEX_S) |
- ALU_STAT_READ | ALU_STAT_START;
+ data = (index << shifts[ALU_STAT_INDEX]) |
+ masks[ALU_STAT_READ] | ALU_STAT_START;
ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);

/* wait to be finished */
@@ -702,7 +707,7 @@ int ksz9477_mdb_add(struct ksz_device *dev, int port,

ksz9477_write_table(dev, static_table);

- data = (index << ALU_STAT_INDEX_S) | ALU_STAT_START;
+ data = (index << shifts[ALU_STAT_INDEX]) | ALU_STAT_START;
ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);

/* wait to be finished */
@@ -718,11 +723,16 @@ int ksz9477_mdb_del(struct ksz_device *dev, int port,
const struct switchdev_obj_port_mdb *mdb, struct dsa_db db)
{
u32 static_table[4];
+ const u8 *shifts;
+ const u32 *masks;
u32 data;
int index;
int ret = 0;
u32 mac_hi, mac_lo;

+ shifts = dev->info->shifts;
+ masks = dev->info->masks;
+
mac_hi = ((mdb->addr[0] << 8) | mdb->addr[1]);
mac_lo = ((mdb->addr[2] << 24) | (mdb->addr[3] << 16));
mac_lo |= ((mdb->addr[4] << 8) | mdb->addr[5]);
@@ -731,8 +741,8 @@ int ksz9477_mdb_del(struct ksz_device *dev, int port,

for (index = 0; index < dev->info->num_statics; index++) {
/* find empty slot first */
- data = (index << ALU_STAT_INDEX_S) |
- ALU_STAT_READ | ALU_STAT_START;
+ data = (index << shifts[ALU_STAT_INDEX]) |
+ masks[ALU_STAT_READ] | ALU_STAT_START;
ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);

/* wait to be finished */
@@ -774,7 +784,7 @@ int ksz9477_mdb_del(struct ksz_device *dev, int port,

ksz9477_write_table(dev, static_table);

- data = (index << ALU_STAT_INDEX_S) | ALU_STAT_START;
+ data = (index << shifts[ALU_STAT_INDEX]) | ALU_STAT_START;
ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);

/* wait to be finished */
@@ -1230,9 +1240,12 @@ void ksz9477_config_cpu_port(struct dsa_switch *ds)

int ksz9477_enable_stp_addr(struct ksz_device *dev)
{
+ const u32 *masks;
u32 data;
int ret;

+ masks = dev->info->masks;
+
/* Enable Reserved multicast table */
ksz_cfg(dev, REG_SW_LUE_CTRL_0, SW_RESV_MCAST_ENABLE, true);

@@ -1242,7 +1255,7 @@ int ksz9477_enable_stp_addr(struct ksz_device *dev)
if (ret < 0)
return ret;

- data = ALU_STAT_START | ALU_RESV_MCAST_ADDR;
+ data = ALU_STAT_START | ALU_RESV_MCAST_ADDR | masks[ALU_STAT_WRITE];

ret = ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);
if (ret < 0)
diff --git a/drivers/net/dsa/microchip/ksz9477_reg.h b/drivers/net/dsa/microchip/ksz9477_reg.h
index 2ba0f4449130..d0cce4ca3cf9 100644
--- a/drivers/net/dsa/microchip/ksz9477_reg.h
+++ b/drivers/net/dsa/microchip/ksz9477_reg.h
@@ -419,12 +419,9 @@

#define REG_SW_ALU_STAT_CTRL__4 0x041C

-#define ALU_STAT_INDEX_M (BIT(4) - 1)
-#define ALU_STAT_INDEX_S 16
#define ALU_RESV_MCAST_INDEX_M (BIT(6) - 1)
#define ALU_STAT_START BIT(7)
#define ALU_RESV_MCAST_ADDR BIT(1)
-#define ALU_STAT_READ BIT(0)

#define REG_SW_ALU_VAL_A 0x0420

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 29b42b3b39c9..d631a4bf35ed 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -314,7 +314,24 @@ static const u16 ksz9477_regs[] = {
[S_START_CTRL] = 0x0300,
[S_BROADCAST_CTRL] = 0x0332,
[S_MULTICAST_CTRL] = 0x0331,
+};
+
+static const u32 ksz9477_masks[] = {
+ [ALU_STAT_WRITE] = 0,
+ [ALU_STAT_READ] = 1,
+};
+
+static const u8 ksz9477_shifts[] = {
+ [ALU_STAT_INDEX] = 16,
+};
+
+static const u32 lan937x_masks[] = {
+ [ALU_STAT_WRITE] = 1,
+ [ALU_STAT_READ] = 2,
+};

+static const u8 lan937x_shifts[] = {
+ [ALU_STAT_INDEX] = 8,
};

const struct ksz_chip_data ksz_switch_chips[] = {
@@ -432,6 +449,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
.reg_mib_cnt = MIB_COUNTER_NUM,
.regs = ksz9477_regs,
+ .masks = ksz9477_masks,
+ .shifts = ksz9477_shifts,
.supports_mii = {false, false, false, false,
false, true, false},
.supports_rmii = {false, false, false, false,
@@ -456,6 +475,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
.reg_mib_cnt = MIB_COUNTER_NUM,
.regs = ksz9477_regs,
+ .masks = ksz9477_masks,
+ .shifts = ksz9477_shifts,
.supports_mii = {false, false, false, false,
false, true, true},
.supports_rmii = {false, false, false, false,
@@ -479,6 +500,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
.reg_mib_cnt = MIB_COUNTER_NUM,
.regs = ksz9477_regs,
+ .masks = ksz9477_masks,
+ .shifts = ksz9477_shifts,
.supports_mii = {false, false, true},
.supports_rmii = {false, false, true},
.supports_rgmii = {false, false, true},
@@ -499,6 +522,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
.reg_mib_cnt = MIB_COUNTER_NUM,
.regs = ksz9477_regs,
+ .masks = ksz9477_masks,
+ .shifts = ksz9477_shifts,
.supports_mii = {false, false, false, false,
false, true, true},
.supports_rmii = {false, false, false, false,
@@ -521,6 +546,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
.reg_mib_cnt = MIB_COUNTER_NUM,
.regs = ksz9477_regs,
+ .masks = lan937x_masks,
+ .shifts = lan937x_shifts,
.supports_mii = {false, false, false, false, true},
.supports_rmii = {false, false, false, false, true},
.supports_rgmii = {false, false, false, false, true},
@@ -539,6 +566,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
.reg_mib_cnt = MIB_COUNTER_NUM,
.regs = ksz9477_regs,
+ .masks = lan937x_masks,
+ .shifts = lan937x_shifts,
.supports_mii = {false, false, false, false, true, true},
.supports_rmii = {false, false, false, false, true, true},
.supports_rgmii = {false, false, false, false, true, true},
@@ -557,6 +586,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
.reg_mib_cnt = MIB_COUNTER_NUM,
.regs = ksz9477_regs,
+ .masks = lan937x_masks,
+ .shifts = lan937x_shifts,
.supports_mii = {false, false, false, false,
true, true, false, false},
.supports_rmii = {false, false, false, false,
@@ -579,6 +610,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
.reg_mib_cnt = MIB_COUNTER_NUM,
.regs = ksz9477_regs,
+ .masks = lan937x_masks,
+ .shifts = lan937x_shifts,
.supports_mii = {false, false, false, false,
true, true, false, false},
.supports_rmii = {false, false, false, false,
@@ -601,6 +634,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
.reg_mib_cnt = MIB_COUNTER_NUM,
.regs = ksz9477_regs,
+ .masks = lan937x_masks,
+ .shifts = lan937x_shifts,
.supports_mii = {false, false, false, false,
true, true, false, false},
.supports_rmii = {false, false, false, false,
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index b61e569a9949..5f69dc872752 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -191,6 +191,8 @@ enum ksz_masks {
DYNAMIC_MAC_TABLE_FID,
DYNAMIC_MAC_TABLE_SRC_PORT,
DYNAMIC_MAC_TABLE_TIMESTAMP,
+ ALU_STAT_WRITE,
+ ALU_STAT_READ,
};

enum ksz_shifts {
@@ -203,6 +205,7 @@ enum ksz_shifts {
DYNAMIC_MAC_FID,
DYNAMIC_MAC_TIMESTAMP,
DYNAMIC_MAC_SRC_PORT,
+ ALU_STAT_INDEX,
};

struct alu_struct {
--
2.36.1

Next message: Arun Ramadoss: "[Patch net-next v14 08/13] net: dsa: microchip: lan937x: register mdio-bus"
Previous message: Nikolay Aleksandrov: "Re: [PATCH net-next v1 1/1] net: bridge: ensure that multicast packets cannot unlock a locked port"
In reply to: Arun Ramadoss: "[Patch net-next v14 05/13] net: dsa: microchip: add DSA support for microchip LAN937x"
Next in thread: Arun Ramadoss: "[Patch net-next v14 08/13] net: dsa: microchip: lan937x: register mdio-bus"
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