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net: xilinx: axienet: Add statistics support

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Add support for reading the statistics counters, if they are enabled.
The counters may be 64-bit, but we can't detect this statically as
there's no ability bit for it and the counters are read-only. Therefore,
we assume the counters are 32-bits by default. To ensure we don't miss
an overflow, we read all counters at 13-second intervals. This should be
often enough to ensure the bytes counters don't wrap at 2.5 Gbit/s.

Another complication is that the counters may be reset when the device
is reset (depending on configuration). To ensure the counters persist
across link up/down (including suspend/resume), we maintain our own
versions along with the last counter value we saw. Because we might wait
up to 100 ms for the reset to complete, we use a mutex to protect
writing hw_stats. We can't sleep in ndo_get_stats64, so we use a seqlock
to protect readers.

We don't bother disabling the refresh work when we detect 64-bit
counters. This is because the reset issue requires us to read
hw_stat_base and reset_in_progress anyway, which would still require the
seqcount. And I don't think skipping the task is worth the extra
bookkeeping.

We can't use the byte counters for either get_stats64 or
get_eth_mac_stats. This is because the byte counters include everything
in the frame (destination address to FCS, inclusive). But
rtnl_link_stats64 wants bytes excluding the FCS, and
ethtool_eth_mac_stats wants to exclude the L2 overhead (addresses and
length/type). It might be possible to calculate the byte values Linux
expects based on the frame counters, but I think it is simpler to use
the existing software counters.

get_ethtool_stats is implemented for nonstandard statistics. This
includes the aforementioned byte counters, VLAN and PFC frame
counters, and user-defined (e.g. with custom RTL) counters.

Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Link: https://patch.msgid.link/20240820175343.760389-3-sean.anderson@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Sean Anderson 2024-08-20 13:53:42 -04:00 committed by Jakub Kicinski
parent d70e3788da
commit 76abb5d675
2 changed files with 407 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

85
drivers/net/ethernet/xilinx/xilinx_axienet.h
View File

@ -156,6 +156,7 @@
#define XAE_TPID0_OFFSET 0x00000028 /* VLAN TPID0 register */
#define XAE_TPID1_OFFSET 0x0000002C /* VLAN TPID1 register */
#define XAE_PPST_OFFSET 0x00000030 /* PCS PMA Soft Temac Status Reg */
#define XAE_STATS_OFFSET 0x00000200 /* Statistics counters */
#define XAE_RCW0_OFFSET 0x00000400 /* Rx Configuration Word 0 */
#define XAE_RCW1_OFFSET 0x00000404 /* Rx Configuration Word 1 */
#define XAE_TC_OFFSET 0x00000408 /* Tx Configuration */
@ -163,6 +164,7 @@
#define XAE_EMMC_OFFSET 0x00000410 /* MAC speed configuration */
#define XAE_PHYC_OFFSET 0x00000414 /* RX Max Frame Configuration */
#define XAE_ID_OFFSET 0x000004F8 /* Identification register */
#define XAE_ABILITY_OFFSET 0x000004FC /* Ability Register offset */
#define XAE_MDIO_MC_OFFSET 0x00000500 /* MDIO Setup */
#define XAE_MDIO_MCR_OFFSET 0x00000504 /* MDIO Control */
#define XAE_MDIO_MWD_OFFSET 0x00000508 /* MDIO Write Data */
@ -283,6 +285,16 @@
#define XAE_PHYC_SGLINKSPD_100 0x40000000 /* SGMII link 100 Mbit */
#define XAE_PHYC_SGLINKSPD_1000 0x80000000 /* SGMII link 1000 Mbit */
/* Bit masks for Axi Ethernet ability register */
#define XAE_ABILITY_PFC BIT(16)
#define XAE_ABILITY_FRAME_FILTER BIT(10)
#define XAE_ABILITY_HALF_DUPLEX BIT(9)
#define XAE_ABILITY_STATS BIT(8)
#define XAE_ABILITY_2_5G BIT(3)
#define XAE_ABILITY_1G BIT(2)
#define XAE_ABILITY_100M BIT(1)
#define XAE_ABILITY_10M BIT(0)
/* Bit masks for Axi Ethernet MDIO interface MC register */
#define XAE_MDIO_MC_MDIOEN_MASK 0x00000040 /* MII management enable */
#define XAE_MDIO_MC_CLOCK_DIVIDE_MAX 0x3F /* Maximum MDIO divisor */
@ -331,6 +343,7 @@
#define XAE_FEATURE_FULL_RX_CSUM BIT(2)
#define XAE_FEATURE_FULL_TX_CSUM BIT(3)
#define XAE_FEATURE_DMA_64BIT BIT(4)
#define XAE_FEATURE_STATS BIT(5)
#define XAE_NO_CSUM_OFFLOAD 0
@ -344,6 +357,61 @@
#define XLNX_MII_STD_SELECT_REG 0x11
#define XLNX_MII_STD_SELECT_SGMII BIT(0)
/* enum temac_stat - TEMAC statistics counters
*
* Index of statistics counters within the TEMAC. This must match the
* order/offset of hardware registers exactly.
*/
enum temac_stat {
STAT_RX_BYTES = 0,
STAT_TX_BYTES,
STAT_UNDERSIZE_FRAMES,
STAT_FRAGMENT_FRAMES,
STAT_RX_64_BYTE_FRAMES,
STAT_RX_65_127_BYTE_FRAMES,
STAT_RX_128_255_BYTE_FRAMES,
STAT_RX_256_511_BYTE_FRAMES,
STAT_RX_512_1023_BYTE_FRAMES,
STAT_RX_1024_MAX_BYTE_FRAMES,
STAT_RX_OVERSIZE_FRAMES,
STAT_TX_64_BYTE_FRAMES,
STAT_TX_65_127_BYTE_FRAMES,
STAT_TX_128_255_BYTE_FRAMES,
STAT_TX_256_511_BYTE_FRAMES,
STAT_TX_512_1023_BYTE_FRAMES,
STAT_TX_1024_MAX_BYTE_FRAMES,
STAT_TX_OVERSIZE_FRAMES,
STAT_RX_GOOD_FRAMES,
STAT_RX_FCS_ERRORS,
STAT_RX_BROADCAST_FRAMES,
STAT_RX_MULTICAST_FRAMES,
STAT_RX_CONTROL_FRAMES,
STAT_RX_LENGTH_ERRORS,
STAT_RX_VLAN_FRAMES,
STAT_RX_PAUSE_FRAMES,
STAT_RX_CONTROL_OPCODE_ERRORS,
STAT_TX_GOOD_FRAMES,
STAT_TX_BROADCAST_FRAMES,
STAT_TX_MULTICAST_FRAMES,
STAT_TX_UNDERRUN_ERRORS,
STAT_TX_CONTROL_FRAMES,
STAT_TX_VLAN_FRAMES,
STAT_TX_PAUSE_FRAMES,
STAT_TX_SINGLE_COLLISION_FRAMES,
STAT_TX_MULTIPLE_COLLISION_FRAMES,
STAT_TX_DEFERRED_FRAMES,
STAT_TX_LATE_COLLISIONS,
STAT_TX_EXCESS_COLLISIONS,
STAT_TX_EXCESS_DEFERRAL,
STAT_RX_ALIGNMENT_ERRORS,
STAT_TX_PFC_FRAMES,
STAT_RX_PFC_FRAMES,
STAT_USER_DEFINED0,
STAT_USER_DEFINED1,
STAT_USER_DEFINED2,
STAT_COUNT,
};
/**
* struct axidma_bd - Axi Dma buffer descriptor layout
* @next: MM2S/S2MM Next Descriptor Pointer
@ -434,6 +502,16 @@ struct skbuf_dma_descriptor {
* @tx_packets: TX packet count for statistics
* @tx_bytes: TX byte count for statistics
* @tx_stat_sync: Synchronization object for TX stats
* @hw_stat_base: Base offset for statistics counters. This may be nonzero if
* the statistics counteres were reset or wrapped around.
* @hw_last_counter: Last-seen value of each statistic counter
* @reset_in_progress: Set while we are performing a reset and statistics
* counters may be invalid
* @hw_stats_seqcount: Sequence counter for @hw_stat_base, @hw_last_counter,
* and @reset_in_progress.
* @stats_lock: Lock for @hw_stats_seqcount
* @stats_work: Work for reading the hardware statistics counters often enough
* to catch overflows.
* @dma_err_task: Work structure to process Axi DMA errors
* @tx_irq: Axidma TX IRQ number
* @rx_irq: Axidma RX IRQ number
@ -505,6 +583,13 @@ struct axienet_local {
u64_stats_t tx_bytes;
struct u64_stats_sync tx_stat_sync;
u64 hw_stat_base[STAT_COUNT];
u32 hw_last_counter[STAT_COUNT];
seqcount_mutex_t hw_stats_seqcount;
struct mutex stats_lock;
struct delayed_work stats_work;
bool reset_in_progress;
struct work_struct dma_err_task;
int tx_irq;

325
drivers/net/ethernet/xilinx/xilinx_axienet_main.c
View File

@ -519,11 +519,55 @@ static void axienet_setoptions(struct net_device *ndev, u32 options)
lp->options |= options;
}
static u64 axienet_stat(struct axienet_local *lp, enum temac_stat stat)
{
u32 counter;
if (lp->reset_in_progress)
return lp->hw_stat_base[stat];
counter = axienet_ior(lp, XAE_STATS_OFFSET + stat * 8);
return lp->hw_stat_base[stat] + (counter - lp->hw_last_counter[stat]);
}
static void axienet_stats_update(struct axienet_local *lp, bool reset)
{
enum temac_stat stat;
write_seqcount_begin(&lp->hw_stats_seqcount);
lp->reset_in_progress = reset;
for (stat = 0; stat < STAT_COUNT; stat++) {
u32 counter = axienet_ior(lp, XAE_STATS_OFFSET + stat * 8);
lp->hw_stat_base[stat] += counter - lp->hw_last_counter[stat];
lp->hw_last_counter[stat] = counter;
}
write_seqcount_end(&lp->hw_stats_seqcount);
}
static void axienet_refresh_stats(struct work_struct *work)
{
struct axienet_local *lp = container_of(work, struct axienet_local,
stats_work.work);
mutex_lock(&lp->stats_lock);
axienet_stats_update(lp, false);
mutex_unlock(&lp->stats_lock);
/* Just less than 2^32 bytes at 2.5 GBit/s */
schedule_delayed_work(&lp->stats_work, 13 * HZ);
}
static int __axienet_device_reset(struct axienet_local *lp)
{
u32 value;
int ret;
/* Save statistics counters in case they will be reset */
mutex_lock(&lp->stats_lock);
if (lp->features & XAE_FEATURE_STATS)
axienet_stats_update(lp, true);
/* Reset Axi DMA. This would reset Axi Ethernet core as well. The reset
* process of Axi DMA takes a while to complete as all pending
* commands/transfers will be flushed or completed during this
@ -538,7 +582,7 @@ static int __axienet_device_reset(struct axienet_local *lp)
XAXIDMA_TX_CR_OFFSET);
if (ret) {
dev_err(lp->dev, "%s: DMA reset timeout!\n", __func__);
return ret;
goto out;
}
/* Wait for PhyRstCmplt bit to be set, indicating the PHY reset has finished */
@ -548,10 +592,29 @@ static int __axienet_device_reset(struct axienet_local *lp)
XAE_IS_OFFSET);
if (ret) {
dev_err(lp->dev, "%s: timeout waiting for PhyRstCmplt\n", __func__);
return ret;
goto out;
}
return 0;
/* Update statistics counters with new values */
if (lp->features & XAE_FEATURE_STATS) {
enum temac_stat stat;
write_seqcount_begin(&lp->hw_stats_seqcount);
lp->reset_in_progress = false;
for (stat = 0; stat < STAT_COUNT; stat++) {
u32 counter =
axienet_ior(lp, XAE_STATS_OFFSET + stat * 8);
lp->hw_stat_base[stat] +=
lp->hw_last_counter[stat] - counter;
lp->hw_last_counter[stat] = counter;
}
write_seqcount_end(&lp->hw_stats_seqcount);
}
out:
mutex_unlock(&lp->stats_lock);
return ret;
}
/**
@ -1530,6 +1593,9 @@ static int axienet_open(struct net_device *ndev)
phylink_start(lp->phylink);
/* Start the statistics refresh work */
schedule_delayed_work(&lp->stats_work, 0);
if (lp->use_dmaengine) {
/* Enable interrupts for Axi Ethernet core (if defined) */
if (lp->eth_irq > 0) {
@ -1554,6 +1620,7 @@ err_free_eth_irq:
if (lp->eth_irq > 0)
free_irq(lp->eth_irq, ndev);
err_phy:
cancel_delayed_work_sync(&lp->stats_work);
phylink_stop(lp->phylink);
phylink_disconnect_phy(lp->phylink);
return ret;
@ -1579,6 +1646,8 @@ static int axienet_stop(struct net_device *ndev)
napi_disable(&lp->napi_rx);
}
cancel_delayed_work_sync(&lp->stats_work);
phylink_stop(lp->phylink);
phylink_disconnect_phy(lp->phylink);
@ -1692,6 +1761,35 @@ axienet_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
stats->tx_packets = u64_stats_read(&lp->tx_packets);
stats->tx_bytes = u64_stats_read(&lp->tx_bytes);
} while (u64_stats_fetch_retry(&lp->tx_stat_sync, start));
if (!(lp->features & XAE_FEATURE_STATS))
return;
do {
start = read_seqcount_begin(&lp->hw_stats_seqcount);
stats->rx_length_errors =
axienet_stat(lp, STAT_RX_LENGTH_ERRORS);
stats->rx_crc_errors = axienet_stat(lp, STAT_RX_FCS_ERRORS);
stats->rx_frame_errors =
axienet_stat(lp, STAT_RX_ALIGNMENT_ERRORS);
stats->rx_errors = axienet_stat(lp, STAT_UNDERSIZE_FRAMES) +
axienet_stat(lp, STAT_FRAGMENT_FRAMES) +
stats->rx_length_errors +
stats->rx_crc_errors +
stats->rx_frame_errors;
stats->multicast = axienet_stat(lp, STAT_RX_MULTICAST_FRAMES);
stats->tx_aborted_errors =
axienet_stat(lp, STAT_TX_EXCESS_COLLISIONS);
stats->tx_fifo_errors =
axienet_stat(lp, STAT_TX_UNDERRUN_ERRORS);
stats->tx_window_errors =
axienet_stat(lp, STAT_TX_LATE_COLLISIONS);
stats->tx_errors = axienet_stat(lp, STAT_TX_EXCESS_DEFERRAL) +
stats->tx_aborted_errors +
stats->tx_fifo_errors +
stats->tx_window_errors;
} while (read_seqcount_retry(&lp->hw_stats_seqcount, start));
}
static const struct net_device_ops axienet_netdev_ops = {
@ -1984,6 +2082,213 @@ static int axienet_ethtools_nway_reset(struct net_device *dev)
return phylink_ethtool_nway_reset(lp->phylink);
}
static void axienet_ethtools_get_ethtool_stats(struct net_device *dev,
struct ethtool_stats *stats,
u64 *data)
{
struct axienet_local *lp = netdev_priv(dev);
unsigned int start;
do {
start = read_seqcount_begin(&lp->hw_stats_seqcount);
data[0] = axienet_stat(lp, STAT_RX_BYTES);
data[1] = axienet_stat(lp, STAT_TX_BYTES);
data[2] = axienet_stat(lp, STAT_RX_VLAN_FRAMES);
data[3] = axienet_stat(lp, STAT_TX_VLAN_FRAMES);
data[6] = axienet_stat(lp, STAT_TX_PFC_FRAMES);
data[7] = axienet_stat(lp, STAT_RX_PFC_FRAMES);
data[8] = axienet_stat(lp, STAT_USER_DEFINED0);
data[9] = axienet_stat(lp, STAT_USER_DEFINED1);
data[10] = axienet_stat(lp, STAT_USER_DEFINED2);
} while (read_seqcount_retry(&lp->hw_stats_seqcount, start));
}
static const char axienet_ethtool_stats_strings[][ETH_GSTRING_LEN] = {
"Received bytes",
"Transmitted bytes",
"RX Good VLAN Tagged Frames",
"TX Good VLAN Tagged Frames",
"TX Good PFC Frames",
"RX Good PFC Frames",
"User Defined Counter 0",
"User Defined Counter 1",
"User Defined Counter 2",
};
static void axienet_ethtools_get_strings(struct net_device *dev, u32 stringset, u8 *data)
{
switch (stringset) {
case ETH_SS_STATS:
memcpy(data, axienet_ethtool_stats_strings,
sizeof(axienet_ethtool_stats_strings));
break;
}
}
static int axienet_ethtools_get_sset_count(struct net_device *dev, int sset)
{
struct axienet_local *lp = netdev_priv(dev);
switch (sset) {
case ETH_SS_STATS:
if (lp->features & XAE_FEATURE_STATS)
return ARRAY_SIZE(axienet_ethtool_stats_strings);
fallthrough;
default:
return -EOPNOTSUPP;
}
}
static void
axienet_ethtools_get_pause_stats(struct net_device *dev,
struct ethtool_pause_stats *pause_stats)
{
struct axienet_local *lp = netdev_priv(dev);
unsigned int start;
if (!(lp->features & XAE_FEATURE_STATS))
return;
do {
start = read_seqcount_begin(&lp->hw_stats_seqcount);
pause_stats->tx_pause_frames =
axienet_stat(lp, STAT_TX_PAUSE_FRAMES);
pause_stats->rx_pause_frames =
axienet_stat(lp, STAT_RX_PAUSE_FRAMES);
} while (read_seqcount_retry(&lp->hw_stats_seqcount, start));
}
static void
axienet_ethtool_get_eth_mac_stats(struct net_device *dev,
struct ethtool_eth_mac_stats *mac_stats)
{
struct axienet_local *lp = netdev_priv(dev);
unsigned int start;
if (!(lp->features & XAE_FEATURE_STATS))
return;
do {
start = read_seqcount_begin(&lp->hw_stats_seqcount);
mac_stats->FramesTransmittedOK =
axienet_stat(lp, STAT_TX_GOOD_FRAMES);
mac_stats->SingleCollisionFrames =
axienet_stat(lp, STAT_TX_SINGLE_COLLISION_FRAMES);
mac_stats->MultipleCollisionFrames =
axienet_stat(lp, STAT_TX_MULTIPLE_COLLISION_FRAMES);
mac_stats->FramesReceivedOK =
axienet_stat(lp, STAT_RX_GOOD_FRAMES);
mac_stats->FrameCheckSequenceErrors =
axienet_stat(lp, STAT_RX_FCS_ERRORS);
mac_stats->AlignmentErrors =
axienet_stat(lp, STAT_RX_ALIGNMENT_ERRORS);
mac_stats->FramesWithDeferredXmissions =
axienet_stat(lp, STAT_TX_DEFERRED_FRAMES);
mac_stats->LateCollisions =
axienet_stat(lp, STAT_TX_LATE_COLLISIONS);
mac_stats->FramesAbortedDueToXSColls =
axienet_stat(lp, STAT_TX_EXCESS_COLLISIONS);
mac_stats->MulticastFramesXmittedOK =
axienet_stat(lp, STAT_TX_MULTICAST_FRAMES);
mac_stats->BroadcastFramesXmittedOK =
axienet_stat(lp, STAT_TX_BROADCAST_FRAMES);
mac_stats->FramesWithExcessiveDeferral =
axienet_stat(lp, STAT_TX_EXCESS_DEFERRAL);
mac_stats->MulticastFramesReceivedOK =
axienet_stat(lp, STAT_RX_MULTICAST_FRAMES);
mac_stats->BroadcastFramesReceivedOK =
axienet_stat(lp, STAT_RX_BROADCAST_FRAMES);
mac_stats->InRangeLengthErrors =
axienet_stat(lp, STAT_RX_LENGTH_ERRORS);
} while (read_seqcount_retry(&lp->hw_stats_seqcount, start));
}
static void
axienet_ethtool_get_eth_ctrl_stats(struct net_device *dev,
struct ethtool_eth_ctrl_stats *ctrl_stats)
{
struct axienet_local *lp = netdev_priv(dev);
unsigned int start;
if (!(lp->features & XAE_FEATURE_STATS))
return;
do {
start = read_seqcount_begin(&lp->hw_stats_seqcount);
ctrl_stats->MACControlFramesTransmitted =
axienet_stat(lp, STAT_TX_CONTROL_FRAMES);
ctrl_stats->MACControlFramesReceived =
axienet_stat(lp, STAT_RX_CONTROL_FRAMES);
ctrl_stats->UnsupportedOpcodesReceived =
axienet_stat(lp, STAT_RX_CONTROL_OPCODE_ERRORS);
} while (read_seqcount_retry(&lp->hw_stats_seqcount, start));
}
static const struct ethtool_rmon_hist_range axienet_rmon_ranges[] = {
{ 64, 64 },
{ 65, 127 },
{ 128, 255 },
{ 256, 511 },
{ 512, 1023 },
{ 1024, 1518 },
{ 1519, 16384 },
{ },
};
static void
axienet_ethtool_get_rmon_stats(struct net_device *dev,
struct ethtool_rmon_stats *rmon_stats,
const struct ethtool_rmon_hist_range **ranges)
{
struct axienet_local *lp = netdev_priv(dev);
unsigned int start;
if (!(lp->features & XAE_FEATURE_STATS))
return;
do {
start = read_seqcount_begin(&lp->hw_stats_seqcount);
rmon_stats->undersize_pkts =
axienet_stat(lp, STAT_UNDERSIZE_FRAMES);
rmon_stats->oversize_pkts =
axienet_stat(lp, STAT_RX_OVERSIZE_FRAMES);
rmon_stats->fragments =
axienet_stat(lp, STAT_FRAGMENT_FRAMES);
rmon_stats->hist[0] =
axienet_stat(lp, STAT_RX_64_BYTE_FRAMES);
rmon_stats->hist[1] =
axienet_stat(lp, STAT_RX_65_127_BYTE_FRAMES);
rmon_stats->hist[2] =
axienet_stat(lp, STAT_RX_128_255_BYTE_FRAMES);
rmon_stats->hist[3] =
axienet_stat(lp, STAT_RX_256_511_BYTE_FRAMES);
rmon_stats->hist[4] =
axienet_stat(lp, STAT_RX_512_1023_BYTE_FRAMES);
rmon_stats->hist[5] =
axienet_stat(lp, STAT_RX_1024_MAX_BYTE_FRAMES);
rmon_stats->hist[6] =
rmon_stats->oversize_pkts;
rmon_stats->hist_tx[0] =
axienet_stat(lp, STAT_TX_64_BYTE_FRAMES);
rmon_stats->hist_tx[1] =
axienet_stat(lp, STAT_TX_65_127_BYTE_FRAMES);
rmon_stats->hist_tx[2] =
axienet_stat(lp, STAT_TX_128_255_BYTE_FRAMES);
rmon_stats->hist_tx[3] =
axienet_stat(lp, STAT_TX_256_511_BYTE_FRAMES);
rmon_stats->hist_tx[4] =
axienet_stat(lp, STAT_TX_512_1023_BYTE_FRAMES);
rmon_stats->hist_tx[5] =
axienet_stat(lp, STAT_TX_1024_MAX_BYTE_FRAMES);
rmon_stats->hist_tx[6] =
axienet_stat(lp, STAT_TX_OVERSIZE_FRAMES);
} while (read_seqcount_retry(&lp->hw_stats_seqcount, start));
*ranges = axienet_rmon_ranges;
}
static const struct ethtool_ops axienet_ethtool_ops = {
.supported_coalesce_params = ETHTOOL_COALESCE_MAX_FRAMES |
ETHTOOL_COALESCE_USECS,
@ -2000,6 +2305,13 @@ static const struct ethtool_ops axienet_ethtool_ops = {
.get_link_ksettings = axienet_ethtools_get_link_ksettings,
.set_link_ksettings = axienet_ethtools_set_link_ksettings,
.nway_reset = axienet_ethtools_nway_reset,
.get_ethtool_stats = axienet_ethtools_get_ethtool_stats,
.get_strings = axienet_ethtools_get_strings,
.get_sset_count = axienet_ethtools_get_sset_count,
.get_pause_stats = axienet_ethtools_get_pause_stats,
.get_eth_mac_stats = axienet_ethtool_get_eth_mac_stats,
.get_eth_ctrl_stats = axienet_ethtool_get_eth_ctrl_stats,
.get_rmon_stats = axienet_ethtool_get_rmon_stats,
};
static struct axienet_local *pcs_to_axienet_local(struct phylink_pcs *pcs)
@ -2268,6 +2580,10 @@ static int axienet_probe(struct platform_device *pdev)
u64_stats_init(&lp->rx_stat_sync);
u64_stats_init(&lp->tx_stat_sync);
mutex_init(&lp->stats_lock);
seqcount_mutex_init(&lp->hw_stats_seqcount, &lp->stats_lock);
INIT_DEFERRABLE_WORK(&lp->stats_work, axienet_refresh_stats);
lp->axi_clk = devm_clk_get_optional(&pdev->dev, "s_axi_lite_clk");
if (!lp->axi_clk) {
/* For backward compatibility, if named AXI clock is not present,
@ -2308,6 +2624,9 @@ static int axienet_probe(struct platform_device *pdev)
/* Setup checksum offload, but default to off if not specified */
lp->features = 0;
if (axienet_ior(lp, XAE_ABILITY_OFFSET) & XAE_ABILITY_STATS)
lp->features |= XAE_FEATURE_STATS;
ret = of_property_read_u32(pdev->dev.of_node, "xlnx,txcsum", &value);
if (!ret) {
switch (value) {