diff options
Diffstat (limited to 'drivers/net/dsa/microchip/ksz9477.c')
| -rw-r--r-- | drivers/net/dsa/microchip/ksz9477.c | 123 |
1 files changed, 81 insertions, 42 deletions
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c index 4573b6ed2c4f..94cd38515ab8 100644 --- a/drivers/net/dsa/microchip/ksz9477.c +++ b/drivers/net/dsa/microchip/ksz9477.c @@ -10,6 +10,7 @@ #include <linux/gpio.h> #include <linux/kernel.h> #include <linux/module.h> +#include <linux/iopoll.h> #include <linux/platform_data/microchip-ksz.h> #include <linux/phy.h> #include <linux/etherdevice.h> @@ -18,8 +19,8 @@ #include <net/switchdev.h> #include "ksz_priv.h" -#include "ksz_common.h" #include "ksz9477_reg.h" +#include "ksz_common.h" static const struct { int index; @@ -259,6 +260,75 @@ static int ksz9477_reset_switch(struct ksz_device *dev) return 0; } +static void ksz9477_r_mib_cnt(struct ksz_device *dev, int port, u16 addr, + u64 *cnt) +{ + struct ksz_poll_ctx ctx = { + .dev = dev, + .port = port, + .offset = REG_PORT_MIB_CTRL_STAT__4, + }; + struct ksz_port *p = &dev->ports[port]; + u32 data; + int ret; + + /* retain the flush/freeze bit */ + data = p->freeze ? MIB_COUNTER_FLUSH_FREEZE : 0; + data |= MIB_COUNTER_READ; + data |= (addr << MIB_COUNTER_INDEX_S); + ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, data); + + ret = readx_poll_timeout(ksz_pread32_poll, &ctx, data, + !(data & MIB_COUNTER_READ), 10, 1000); + + /* failed to read MIB. get out of loop */ + if (ret < 0) { + dev_dbg(dev->dev, "Failed to get MIB\n"); + return; + } + + /* count resets upon read */ + ksz_pread32(dev, port, REG_PORT_MIB_DATA, &data); + *cnt += data; +} + +static void ksz9477_r_mib_pkt(struct ksz_device *dev, int port, u16 addr, + u64 *dropped, u64 *cnt) +{ + addr = ksz9477_mib_names[addr].index; + ksz9477_r_mib_cnt(dev, port, addr, cnt); +} + +static void ksz9477_freeze_mib(struct ksz_device *dev, int port, bool freeze) +{ + u32 val = freeze ? MIB_COUNTER_FLUSH_FREEZE : 0; + struct ksz_port *p = &dev->ports[port]; + + /* enable/disable the port for flush/freeze function */ + mutex_lock(&p->mib.cnt_mutex); + ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, val); + + /* used by MIB counter reading code to know freeze is enabled */ + p->freeze = freeze; + mutex_unlock(&p->mib.cnt_mutex); +} + +static void ksz9477_port_init_cnt(struct ksz_device *dev, int port) +{ + struct ksz_port_mib *mib = &dev->ports[port].mib; + + /* flush all enabled port MIB counters */ + mutex_lock(&mib->cnt_mutex); + ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, + MIB_COUNTER_FLUSH_FREEZE); + ksz_write8(dev, REG_SW_MAC_CTRL_6, SW_MIB_COUNTER_FLUSH); + ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, 0); + mutex_unlock(&mib->cnt_mutex); + + mib->cnt_ptr = 0; + memset(mib->counters, 0, dev->mib_cnt * sizeof(u64)); +} + static enum dsa_tag_protocol ksz9477_get_tag_protocol(struct dsa_switch *ds, int port) { @@ -342,47 +412,6 @@ static void ksz9477_get_strings(struct dsa_switch *ds, int port, } } -static void ksz_get_ethtool_stats(struct dsa_switch *ds, int port, - uint64_t *buf) -{ - struct ksz_device *dev = ds->priv; - int i; - u32 data; - int timeout; - - mutex_lock(&dev->stats_mutex); - - for (i = 0; i < TOTAL_SWITCH_COUNTER_NUM; i++) { - data = MIB_COUNTER_READ; - data |= ((ksz9477_mib_names[i].index & 0xFF) << - MIB_COUNTER_INDEX_S); - ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, data); - - timeout = 1000; - do { - ksz_pread32(dev, port, REG_PORT_MIB_CTRL_STAT__4, - &data); - usleep_range(1, 10); - if (!(data & MIB_COUNTER_READ)) - break; - } while (timeout-- > 0); - - /* failed to read MIB. get out of loop */ - if (!timeout) { - dev_dbg(dev->dev, "Failed to get MIB\n"); - break; - } - - /* count resets upon read */ - ksz_pread32(dev, port, REG_PORT_MIB_DATA, &data); - - dev->mib_value[i] += (uint64_t)data; - buf[i] = dev->mib_value[i]; - } - - mutex_unlock(&dev->stats_mutex); -} - static void ksz9477_cfg_port_member(struct ksz_device *dev, int port, u8 member) { @@ -1151,9 +1180,14 @@ static int ksz9477_setup(struct dsa_switch *ds) /* queue based egress rate limit */ ksz_cfg(dev, REG_SW_MAC_CTRL_5, SW_OUT_RATE_LIMIT_QUEUE_BASED, true); + /* enable global MIB counter freeze function */ + ksz_cfg(dev, REG_SW_MAC_CTRL_6, SW_MIB_COUNTER_FREEZE, true); + /* start switch */ ksz_cfg(dev, REG_SW_OPERATION, SW_START, true); + ksz_init_mib_timer(dev); + return 0; } @@ -1287,6 +1321,7 @@ static int ksz9477_switch_init(struct ksz_device *dev) if (!dev->ports) return -ENOMEM; for (i = 0; i < dev->mib_port_cnt; i++) { + mutex_init(&dev->ports[i].mib.cnt_mutex); dev->ports[i].mib.counters = devm_kzalloc(dev->dev, sizeof(u64) * @@ -1311,6 +1346,10 @@ static const struct ksz_dev_ops ksz9477_dev_ops = { .flush_dyn_mac_table = ksz9477_flush_dyn_mac_table, .phy_setup = ksz9477_phy_setup, .port_setup = ksz9477_port_setup, + .r_mib_cnt = ksz9477_r_mib_cnt, + .r_mib_pkt = ksz9477_r_mib_pkt, + .freeze_mib = ksz9477_freeze_mib, + .port_init_cnt = ksz9477_port_init_cnt, .shutdown = ksz9477_reset_switch, .detect = ksz9477_switch_detect, .init = ksz9477_switch_init, |