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net: mvpp2: add ethtool GOP statistics

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Add ethtool statistics support by reading the GOP statistics from the
hardware counters. Also implement a workqueue to gather the statistics
every second or some 32-bit counters could overflow.

Suggested-by: Stefan Chulski <stefanc@marvell.com>
Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Miquel Raynal 2017-11-06 22:56:53 +01:00 committed by David S. Miller
parent 403466feb1
commit 118d6298f6
1 changed files with 223 additions and 5 deletions
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228
drivers/net/ethernet/marvell/mvpp2.c
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@ -799,6 +799,42 @@ enum mvpp2_bm_type {
MVPP2_BM_SWF_SHORT
};
/* GMAC MIB Counters register definitions */
#define MVPP21_MIB_COUNTERS_OFFSET 0x1000
#define MVPP21_MIB_COUNTERS_PORT_SZ 0x400
#define MVPP22_MIB_COUNTERS_OFFSET 0x0
#define MVPP22_MIB_COUNTERS_PORT_SZ 0x100
#define MVPP2_MIB_GOOD_OCTETS_RCVD 0x0
#define MVPP2_MIB_BAD_OCTETS_RCVD 0x8
#define MVPP2_MIB_CRC_ERRORS_SENT 0xc
#define MVPP2_MIB_UNICAST_FRAMES_RCVD 0x10
#define MVPP2_MIB_BROADCAST_FRAMES_RCVD 0x18
#define MVPP2_MIB_MULTICAST_FRAMES_RCVD 0x1c
#define MVPP2_MIB_FRAMES_64_OCTETS 0x20
#define MVPP2_MIB_FRAMES_65_TO_127_OCTETS 0x24
#define MVPP2_MIB_FRAMES_128_TO_255_OCTETS 0x28
#define MVPP2_MIB_FRAMES_256_TO_511_OCTETS 0x2c
#define MVPP2_MIB_FRAMES_512_TO_1023_OCTETS 0x30
#define MVPP2_MIB_FRAMES_1024_TO_MAX_OCTETS 0x34
#define MVPP2_MIB_GOOD_OCTETS_SENT 0x38
#define MVPP2_MIB_UNICAST_FRAMES_SENT 0x40
#define MVPP2_MIB_MULTICAST_FRAMES_SENT 0x48
#define MVPP2_MIB_BROADCAST_FRAMES_SENT 0x4c
#define MVPP2_MIB_FC_SENT 0x54
#define MVPP2_MIB_FC_RCVD 0x58
#define MVPP2_MIB_RX_FIFO_OVERRUN 0x5c
#define MVPP2_MIB_UNDERSIZE_RCVD 0x60
#define MVPP2_MIB_FRAGMENTS_RCVD 0x64
#define MVPP2_MIB_OVERSIZE_RCVD 0x68
#define MVPP2_MIB_JABBER_RCVD 0x6c
#define MVPP2_MIB_MAC_RCV_ERROR 0x70
#define MVPP2_MIB_BAD_CRC_EVENT 0x74
#define MVPP2_MIB_COLLISION 0x78
#define MVPP2_MIB_LATE_COLLISION 0x7c
#define MVPP2_MIB_COUNTERS_STATS_DELAY (1 * HZ)
/* Definitions */
/* Shared Packet Processor resources */
@ -826,6 +862,7 @@ struct mvpp2 {
struct clk *axi_clk;
/* List of pointers to port structures */
int port_count;
struct mvpp2_port **port_list;
/* Aggregated TXQs */
@ -847,6 +884,12 @@ struct mvpp2 {
/* Maximum number of RXQs per port */
unsigned int max_port_rxqs;
/* Workqueue to gather hardware statistics with its lock */
struct mutex gather_stats_lock;
struct delayed_work stats_work;
char queue_name[30];
struct workqueue_struct *stats_queue;
};
struct mvpp2_pcpu_stats {
@ -891,6 +934,7 @@ struct mvpp2_port {
/* Per-port registers' base address */
void __iomem *base;
void __iomem *stats_base;
struct mvpp2_rx_queue **rxqs;
unsigned int nrxqs;
@ -909,6 +953,7 @@ struct mvpp2_port {
u16 tx_ring_size;
u16 rx_ring_size;
struct mvpp2_pcpu_stats __percpu *stats;
u64 *ethtool_stats;
phy_interface_t phy_interface;
struct device_node *phy_node;
@ -4778,9 +4823,136 @@ static void mvpp2_port_loopback_set(struct mvpp2_port *port)
writel(val, port->base + MVPP2_GMAC_CTRL_1_REG);
}
struct mvpp2_ethtool_counter {
unsigned int offset;
const char string[ETH_GSTRING_LEN];
bool reg_is_64b;
};
static u64 mvpp2_read_count(struct mvpp2_port *port,
const struct mvpp2_ethtool_counter *counter)
{
u64 val;
val = readl(port->stats_base + counter->offset);
if (counter->reg_is_64b)
val += (u64)readl(port->stats_base + counter->offset + 4) << 32;
return val;
}
/* Due to the fact that software statistics and hardware statistics are, by
* design, incremented at different moments in the chain of packet processing,
* it is very likely that incoming packets could have been dropped after being
* counted by hardware but before reaching software statistics (most probably
* multicast packets), and in the oppposite way, during transmission, FCS bytes
* are added in between as well as TSO skb will be split and header bytes added.
* Hence, statistics gathered from userspace with ifconfig (software) and
* ethtool (hardware) cannot be compared.
*/
static const struct mvpp2_ethtool_counter mvpp2_ethtool_regs[] = {
{ MVPP2_MIB_GOOD_OCTETS_RCVD, "good_octets_received", true },
{ MVPP2_MIB_BAD_OCTETS_RCVD, "bad_octets_received" },
{ MVPP2_MIB_CRC_ERRORS_SENT, "crc_errors_sent" },
{ MVPP2_MIB_UNICAST_FRAMES_RCVD, "unicast_frames_received" },
{ MVPP2_MIB_BROADCAST_FRAMES_RCVD, "broadcast_frames_received" },
{ MVPP2_MIB_MULTICAST_FRAMES_RCVD, "multicast_frames_received" },
{ MVPP2_MIB_FRAMES_64_OCTETS, "frames_64_octets" },
{ MVPP2_MIB_FRAMES_65_TO_127_OCTETS, "frames_65_to_127_octet" },
{ MVPP2_MIB_FRAMES_128_TO_255_OCTETS, "frames_128_to_255_octet" },
{ MVPP2_MIB_FRAMES_256_TO_511_OCTETS, "frames_256_to_511_octet" },
{ MVPP2_MIB_FRAMES_512_TO_1023_OCTETS, "frames_512_to_1023_octet" },
{ MVPP2_MIB_FRAMES_1024_TO_MAX_OCTETS, "frames_1024_to_max_octet" },
{ MVPP2_MIB_GOOD_OCTETS_SENT, "good_octets_sent", true },
{ MVPP2_MIB_UNICAST_FRAMES_SENT, "unicast_frames_sent" },
{ MVPP2_MIB_MULTICAST_FRAMES_SENT, "multicast_frames_sent" },
{ MVPP2_MIB_BROADCAST_FRAMES_SENT, "broadcast_frames_sent" },
{ MVPP2_MIB_FC_SENT, "fc_sent" },
{ MVPP2_MIB_FC_RCVD, "fc_received" },
{ MVPP2_MIB_RX_FIFO_OVERRUN, "rx_fifo_overrun" },
{ MVPP2_MIB_UNDERSIZE_RCVD, "undersize_received" },
{ MVPP2_MIB_FRAGMENTS_RCVD, "fragments_received" },
{ MVPP2_MIB_OVERSIZE_RCVD, "oversize_received" },
{ MVPP2_MIB_JABBER_RCVD, "jabber_received" },
{ MVPP2_MIB_MAC_RCV_ERROR, "mac_receive_error" },
{ MVPP2_MIB_BAD_CRC_EVENT, "bad_crc_event" },
{ MVPP2_MIB_COLLISION, "collision" },
{ MVPP2_MIB_LATE_COLLISION, "late_collision" },
};
static void mvpp2_ethtool_get_strings(struct net_device *netdev, u32 sset,
u8 *data)
{
if (sset == ETH_SS_STATS) {
int i;
for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_regs); i++)
memcpy(data + i * ETH_GSTRING_LEN,
&mvpp2_ethtool_regs[i].string, ETH_GSTRING_LEN);
}
}
static void mvpp2_gather_hw_statistics(struct work_struct *work)
{
struct delayed_work *del_work = to_delayed_work(work);
struct mvpp2 *priv = container_of(del_work, struct mvpp2, stats_work);
struct mvpp2_port *port;
u64 *pstats;
int i, j;
mutex_lock(&priv->gather_stats_lock);
for (i = 0; i < priv->port_count; i++) {
if (!priv->port_list[i])
continue;
port = priv->port_list[i];
pstats = port->ethtool_stats;
for (j = 0; j < ARRAY_SIZE(mvpp2_ethtool_regs); j++)
*pstats++ += mvpp2_read_count(port,
&mvpp2_ethtool_regs[j]);
}
/* No need to read again the counters right after this function if it
* was called asynchronously by the user (ie. use of ethtool).
*/
cancel_delayed_work(&priv->stats_work);
queue_delayed_work(priv->stats_queue, &priv->stats_work,
MVPP2_MIB_COUNTERS_STATS_DELAY);
mutex_unlock(&priv->gather_stats_lock);
}
static void mvpp2_ethtool_get_stats(struct net_device *dev,
struct ethtool_stats *stats, u64 *data)
{
struct mvpp2_port *port = netdev_priv(dev);
/* Update statistics for all ports, copy only those actually needed */
mvpp2_gather_hw_statistics(&port->priv->stats_work.work);
mutex_lock(&port->priv->gather_stats_lock);
memcpy(data, port->ethtool_stats,
sizeof(u64) * ARRAY_SIZE(mvpp2_ethtool_regs));
mutex_unlock(&port->priv->gather_stats_lock);
}
static int mvpp2_ethtool_get_sset_count(struct net_device *dev, int sset)
{
if (sset == ETH_SS_STATS)
return ARRAY_SIZE(mvpp2_ethtool_regs);
return -EOPNOTSUPP;
}
static void mvpp2_port_reset(struct mvpp2_port *port)
{
u32 val;
unsigned int i;
/* Read the GOP statistics to reset the hardware counters */
for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_regs); i++)
mvpp2_read_count(port, &mvpp2_ethtool_regs[i]);
val = readl(port->base + MVPP2_GMAC_CTRL_2_REG) &
~MVPP2_GMAC_PORT_RESET_MASK;
@ -6912,6 +7084,10 @@ static int mvpp2_open(struct net_device *dev)
if (priv->hw_version == MVPP22)
mvpp22_init_rss(port);
/* Start hardware statistics gathering */
queue_delayed_work(priv->stats_queue, &priv->stats_work,
MVPP2_MIB_COUNTERS_STATS_DELAY);
return 0;
err_free_link_irq:
@ -6956,6 +7132,9 @@ static int mvpp2_stop(struct net_device *dev)
mvpp2_cleanup_rxqs(port);
mvpp2_cleanup_txqs(port);
cancel_delayed_work_sync(&priv->stats_work);
flush_workqueue(priv->stats_queue);
return 0;
}
@ -7267,6 +7446,9 @@ static const struct ethtool_ops mvpp2_eth_tool_ops = {
.get_drvinfo = mvpp2_ethtool_get_drvinfo,
.get_ringparam = mvpp2_ethtool_get_ringparam,
.set_ringparam = mvpp2_ethtool_set_ringparam,
.get_strings = mvpp2_ethtool_get_strings,
.get_ethtool_stats = mvpp2_ethtool_get_stats,
.get_sset_count = mvpp2_ethtool_get_sset_count,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
.set_link_ksettings = phy_ethtool_set_link_ksettings,
};
@ -7670,6 +7852,10 @@ static int mvpp2_port_probe(struct platform_device *pdev,
err = PTR_ERR(port->base);
goto err_free_irq;
}
port->stats_base = port->priv->lms_base +
MVPP21_MIB_COUNTERS_OFFSET +
port->gop_id * MVPP21_MIB_COUNTERS_PORT_SZ;
} else {
if (of_property_read_u32(port_node, "gop-port-id",
&port->gop_id)) {
@ -7679,15 +7865,26 @@ static int mvpp2_port_probe(struct platform_device *pdev,
}
port->base = priv->iface_base + MVPP22_GMAC_BASE(port->gop_id);
port->stats_base = port->priv->iface_base +
MVPP22_MIB_COUNTERS_OFFSET +
port->gop_id * MVPP22_MIB_COUNTERS_PORT_SZ;
}
/* Alloc per-cpu stats */
/* Alloc per-cpu and ethtool stats */
port->stats = netdev_alloc_pcpu_stats(struct mvpp2_pcpu_stats);
if (!port->stats) {
err = -ENOMEM;
goto err_free_irq;
}
port->ethtool_stats = devm_kcalloc(&pdev->dev,
ARRAY_SIZE(mvpp2_ethtool_regs),
sizeof(u64), GFP_KERNEL);
if (!port->ethtool_stats) {
err = -ENOMEM;
goto err_free_stats;
}
mvpp2_port_copy_mac_addr(dev, priv, port_node, &mac_from);
port->tx_ring_size = MVPP2_MAX_TXD;
@ -8010,7 +8207,7 @@ static int mvpp2_probe(struct platform_device *pdev)
struct mvpp2 *priv;
struct resource *res;
void __iomem *base;
int port_count, i;
int i;
int err;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
@ -8125,14 +8322,14 @@ static int mvpp2_probe(struct platform_device *pdev)
goto err_mg_clk;
}
port_count = of_get_available_child_count(dn);
if (port_count == 0) {
priv->port_count = of_get_available_child_count(dn);
if (priv->port_count == 0) {
dev_err(&pdev->dev, "no ports enabled\n");
err = -ENODEV;
goto err_mg_clk;
}
priv->port_list = devm_kcalloc(&pdev->dev, port_count,
priv->port_list = devm_kcalloc(&pdev->dev, priv->port_count,
sizeof(*priv->port_list),
GFP_KERNEL);
if (!priv->port_list) {
@ -8149,6 +8346,24 @@ static int mvpp2_probe(struct platform_device *pdev)
i++;
}
/* Statistics must be gathered regularly because some of them (like
* packets counters) are 32-bit registers and could overflow quite
* quickly. For instance, a 10Gb link used at full bandwidth with the
* smallest packets (64B) will overflow a 32-bit counter in less than
* 30 seconds. Then, use a workqueue to fill 64-bit counters.
*/
mutex_init(&priv->gather_stats_lock);
snprintf(priv->queue_name, sizeof(priv->queue_name),
"stats-wq-%s%s", netdev_name(priv->port_list[0]->dev),
priv->port_count > 1 ? "+" : "");
priv->stats_queue = create_singlethread_workqueue(priv->queue_name);
if (!priv->stats_queue) {
err = -ENOMEM;
goto err_mg_clk;
}
INIT_DELAYED_WORK(&priv->stats_work, mvpp2_gather_hw_statistics);
platform_set_drvdata(pdev, priv);
return 0;
@ -8170,6 +8385,9 @@ static int mvpp2_remove(struct platform_device *pdev)
struct device_node *port_node;
int i = 0;
destroy_workqueue(priv->stats_queue);
mutex_destroy(&priv->gather_stats_lock);
for_each_available_child_of_node(dn, port_node) {
if (priv->port_list[i])
mvpp2_port_remove(priv->port_list[i]);