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Subject[PATCH v3 12/14] habanalabs/gaudi: Add ethtool support using coresight
Date
From: Omer Shpigelman <oshpigelman@habana.ai>

The driver supports ethtool callbacks and provides statistics using the
device's profiling infrastructure (coresight).

We support the basic ethtool functionality and counters, as far as our H/W
provides support.

A summary of the supported callbacks:

- get_drvinfo: fill some basic information regarding the driver
- get_link_ksettings: get basic settings like speed, duplex,
Auto-negotiation and link modes.
- set_link_ksettings: only speed and Auto-negotiation setting is supported.
- get_link: returns link indication.
- get_strings: get counters strings.
- get_sset_count: get counters number.
- get_ethtool_stats: get counters values.
- get_module_info: get EEPROM type and length.
- get_module_eeprom: get EEPROM (supported in raw mode only).

Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
Changes in v3:
- verify the offset and length before copying the eeprom dump to the user
to prevent kernel memroy leakage
- Remove the Tx/Rx counters titles from ethtool statistics

drivers/misc/habanalabs/gaudi/Makefile | 3 +-
drivers/misc/habanalabs/gaudi/gaudi.c | 1 +
drivers/misc/habanalabs/gaudi/gaudiP.h | 7 +
.../misc/habanalabs/gaudi/gaudi_coresight.c | 144 ++++
drivers/misc/habanalabs/gaudi/gaudi_nic.c | 5 +
.../misc/habanalabs/gaudi/gaudi_nic_ethtool.c | 616 ++++++++++++++++++
6 files changed, 775 insertions(+), 1 deletion(-)
create mode 100644 drivers/misc/habanalabs/gaudi/gaudi_nic_ethtool.c

diff --git a/drivers/misc/habanalabs/gaudi/Makefile b/drivers/misc/habanalabs/gaudi/Makefile
index c5143cf6f025..df674c5973e0 100644
--- a/drivers/misc/habanalabs/gaudi/Makefile
+++ b/drivers/misc/habanalabs/gaudi/Makefile
@@ -2,4 +2,5 @@
HL_GAUDI_FILES := gaudi/gaudi.o gaudi/gaudi_hwmgr.o gaudi/gaudi_security.o \
gaudi/gaudi_coresight.o

-HL_GAUDI_FILES += gaudi/gaudi_nic.o gaudi/gaudi_phy.o
+HL_GAUDI_FILES += gaudi/gaudi_nic.o gaudi/gaudi_phy.o \
+ gaudi/gaudi_nic_ethtool.o
diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 71c9e2d18032..2af07eb4165c 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -1044,6 +1044,7 @@ static int gaudi_sw_init(struct hl_device *hdev)
gaudi->cpucp_info_get = gaudi_cpucp_info_get;
gaudi->nic_handle_rx = gaudi_nic_handle_rx;
gaudi->nic_handle_tx = gaudi_nic_handle_tx;
+ gaudi->nic_spmu_init = gaudi_nic_spmu_init;

gaudi->max_freq_value = GAUDI_MAX_CLK_FREQ;

diff --git a/drivers/misc/habanalabs/gaudi/gaudiP.h b/drivers/misc/habanalabs/gaudi/gaudiP.h
index 7d7439da88bc..8b420a86c11b 100644
--- a/drivers/misc/habanalabs/gaudi/gaudiP.h
+++ b/drivers/misc/habanalabs/gaudi/gaudiP.h
@@ -438,6 +438,7 @@ struct gaudi_internal_qman_info {
* @cpucp_info_get: get information on device from CPU-CP
* @nic_handle_rx: NIC handler for incoming packet.
* @nic_handle_tx: NIC handler for outgoing packet.
+ * @nic_spmu_init: initialize NIC CoreSight spmu counters.
* @nic_devices: array that holds all NIC ports manage structures.
* @nic_macros: array that holds all NIC macros manage structures.
* @nic_pam4_tx_taps: array that holds all PAM4 Tx taps of all NIC lanes.
@@ -501,6 +502,7 @@ struct gaudi_device {
int (*cpucp_info_get)(struct hl_device *hdev);
void (*nic_handle_rx)(struct gaudi_nic_device *gaudi_nic);
int (*nic_handle_tx)(struct gaudi_nic_device *gaudi_nic, void *data);
+ void (*nic_spmu_init)(struct hl_device *hdev, int port);
struct gaudi_nic_device nic_devices[NIC_NUMBER_OF_PORTS];
struct gaudi_nic_macro nic_macros[NIC_NUMBER_OF_MACROS];
struct gaudi_nic_tx_taps nic_pam4_tx_taps[NIC_MAX_NUM_OF_LANES];
@@ -574,8 +576,13 @@ irqreturn_t gaudi_nic_rx_irq_handler(int irq, void *arg);
irqreturn_t gaudi_nic_cq_irq_handler(int irq, void *arg);
netdev_tx_t gaudi_nic_handle_tx_pkt(struct gaudi_nic_device *gaudi_nic,
struct sk_buff *skb);
+void gaudi_nic_spmu_init(struct hl_device *hdev, int port);
int gaudi_nic_sw_init(struct hl_device *hdev);
void gaudi_nic_sw_fini(struct hl_device *hdev);
void gaudi_nic_handle_qp_err(struct hl_device *hdev, u16 event_type);
+int gaudi_config_spmu_nic(struct hl_device *hdev, u32 port,
+ u32 num_event_types, u32 event_types[]);
+int gaudi_sample_spmu_nic(struct hl_device *hdev, u32 port,
+ u32 num_out_data, u64 out_data[]);

#endif /* GAUDIP_H_ */
diff --git a/drivers/misc/habanalabs/gaudi/gaudi_coresight.c b/drivers/misc/habanalabs/gaudi/gaudi_coresight.c
index 881531d4d9da..6b43501d20ad 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi_coresight.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi_coresight.c
@@ -16,6 +16,11 @@
#define SPMU_SECTION_SIZE MME0_ACC_SPMU_MAX_OFFSET
#define SPMU_EVENT_TYPES_OFFSET 0x400
#define SPMU_MAX_COUNTERS 6
+#define PMSCR 0x6F0 /* Snapshot Control */
+#define PMEVCNTSR0 0x620 /* Event Counters Snapshot */
+#define PMOVSSR 0x614 /* Overflow Status Snapshot */
+#define PMCCNTSR_L 0x618 /* Cycle Counter Snapshot */
+#define PMCCNTSR_H 0x61c /* Cycle Counter Snapshot */

static u64 debug_stm_regs[GAUDI_STM_LAST + 1] = {
[GAUDI_STM_MME0_ACC] = mmMME0_ACC_STM_BASE,
@@ -752,6 +757,27 @@ static int gaudi_config_bmon(struct hl_device *hdev,
return 0;
}

+static bool gaudi_reg_is_nic_spmu(enum gaudi_debug_spmu_regs_index reg_idx)
+{
+ switch (reg_idx) {
+ case GAUDI_SPMU_NIC0_0:
+ case GAUDI_SPMU_NIC0_1:
+ case GAUDI_SPMU_NIC1_0:
+ case GAUDI_SPMU_NIC1_1:
+ case GAUDI_SPMU_NIC2_0:
+ case GAUDI_SPMU_NIC2_1:
+ case GAUDI_SPMU_NIC3_0:
+ case GAUDI_SPMU_NIC3_1:
+ case GAUDI_SPMU_NIC4_0:
+ case GAUDI_SPMU_NIC4_1:
+ return true;
+ default:
+ break;
+ }
+
+ return false;
+}
+
static int gaudi_config_spmu(struct hl_device *hdev,
struct hl_debug_params *params)
{
@@ -769,6 +795,16 @@ static int gaudi_config_spmu(struct hl_device *hdev,
return -EINVAL;
}

+ /*
+ * NIC spmus are now configured by driver at init
+ * and not accessible to user in dbg mode
+ */
+ if (hdev->in_debug && gaudi_reg_is_nic_spmu(params->reg_idx)) {
+ dev_err(hdev->dev,
+ "Rejecting user debug configuration for NIC spmu\n");
+ return -EFAULT;
+ }
+
base_reg = debug_spmu_regs[params->reg_idx] - CFG_BASE;

if (params->enable) {
@@ -837,6 +873,114 @@ static int gaudi_config_spmu(struct hl_device *hdev,
return 0;
}

+static int gaudi_sample_spmu(struct hl_device *hdev,
+ struct hl_debug_params *params)
+{
+ u32 output_arr_len;
+ u32 cycle_cnt_idx;
+ u32 overflow_idx;
+ u32 events_num;
+ u64 base_reg;
+ u64 *output;
+ int i;
+
+ if (params->reg_idx >= ARRAY_SIZE(debug_spmu_regs)) {
+ dev_err(hdev->dev, "Invalid register index in SPMU\n");
+ return -EINVAL;
+ }
+
+ base_reg = debug_spmu_regs[params->reg_idx] - CFG_BASE;
+
+ output = params->output;
+ output_arr_len = params->output_size / 8;
+ events_num = output_arr_len - 2;
+ overflow_idx = output_arr_len - 2;
+ cycle_cnt_idx = output_arr_len - 1;
+
+ if (!output)
+ return -EINVAL;
+
+ if (output_arr_len < 1) {
+ dev_err(hdev->dev,
+ "not enough values for SPMU sample\n");
+ return -EINVAL;
+ }
+
+ if (events_num > SPMU_MAX_COUNTERS) {
+ dev_err(hdev->dev,
+ "too many events values for SPMU sample\n");
+ return -EINVAL;
+ }
+
+ /* capture */
+ WREG32(base_reg + PMSCR, 1);
+
+ /* read the shadow registers */
+ for (i = 0 ; i < events_num ; i++)
+ output[i] = RREG32(base_reg + PMEVCNTSR0 + i * 4);
+
+ /* also get overflow and cyclecount */
+ if (output_arr_len == SPMU_MAX_COUNTERS + 2) {
+ output[overflow_idx] = RREG32(base_reg + PMOVSSR);
+
+ output[cycle_cnt_idx] = RREG32(base_reg + PMCCNTSR_H);
+ output[cycle_cnt_idx] <<= 32;
+ output[cycle_cnt_idx] |= RREG32(base_reg + PMCCNTSR_L);
+ }
+
+ return 0;
+}
+
+int gaudi_config_spmu_nic(struct hl_device *hdev, u32 port,
+ u32 num_event_types, u32 event_types[])
+{
+ struct hl_debug_params_spmu spmu;
+ struct hl_debug_params params;
+ int i;
+
+ /* validate nic port */
+ if (!gaudi_reg_is_nic_spmu(GAUDI_SPMU_NIC0_0 + port)) {
+ dev_err(hdev->dev, "Invalid nic port %u\n", port);
+ return -EFAULT;
+ }
+
+ memset(&params, 0, sizeof(struct hl_debug_params));
+ params.op = HL_DEBUG_OP_SPMU;
+ params.input = &spmu;
+ params.enable = true;
+ params.reg_idx = GAUDI_SPMU_NIC0_0 + port;
+
+ memset(&spmu, 0, sizeof(struct hl_debug_params_spmu));
+ spmu.event_types_num = num_event_types;
+
+ for (i = 0 ; i < spmu.event_types_num ; i++)
+ spmu.event_types[i] = event_types[i];
+
+ return gaudi_config_spmu(hdev, &params);
+}
+
+int gaudi_sample_spmu_nic(struct hl_device *hdev, u32 port,
+ u32 num_out_data, u64 out_data[])
+{
+ struct hl_debug_params params;
+
+ if (!hdev->supports_coresight)
+ return 0;
+
+ /* validate nic port */
+ if (!gaudi_reg_is_nic_spmu(GAUDI_SPMU_NIC0_0 + port)) {
+ dev_err(hdev->dev, "Invalid nic port %u\n", port);
+ return -EFAULT;
+ }
+
+ memset(&params, 0, sizeof(struct hl_debug_params));
+ params.output = out_data;
+ params.output_size = num_out_data * sizeof(uint64_t);
+ params.reg_idx = GAUDI_SPMU_NIC0_0 + port;
+
+ return gaudi_sample_spmu(hdev, &params);
+}
+
int gaudi_debug_coresight(struct hl_device *hdev, void *data)
{
struct hl_debug_params *params = data;
diff --git a/drivers/misc/habanalabs/gaudi/gaudi_nic.c b/drivers/misc/habanalabs/gaudi/gaudi_nic.c
index 49e94e9c786a..c97e5f0e1c53 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi_nic.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi_nic.c
@@ -2778,6 +2778,7 @@ static int port_register(struct hl_device *hdev, int port)
ndev->dev_port = port;

ndev->netdev_ops = &gaudi_nic_netdev_ops;
+ ndev->ethtool_ops = &gaudi_nic_ethtool_ops;
ndev->watchdog_timeo = NIC_TX_TIMEOUT;
ndev->min_mtu = ETH_MIN_MTU;
ndev->max_mtu = NIC_MAX_MTU;
@@ -2801,6 +2802,8 @@ static int port_register(struct hl_device *hdev, int port)
port);
}

+ gaudi->nic_spmu_init(hdev, port);
+
if (register_netdev(ndev)) {
dev_err(hdev->dev,
"Could not register netdevice, port: %d\n", port);
@@ -3265,6 +3268,8 @@ void gaudi_nic_ports_reopen(struct hl_device *hdev)
continue;
}

+ gaudi->nic_spmu_init(hdev, port);
+
schedule_delayed_work(&gaudi_nic->port_open_work,
msecs_to_jiffies(1));
}
diff --git a/drivers/misc/habanalabs/gaudi/gaudi_nic_ethtool.c b/drivers/misc/habanalabs/gaudi/gaudi_nic_ethtool.c
new file mode 100644
index 000000000000..62c8cd40c927
--- /dev/null
+++ b/drivers/misc/habanalabs/gaudi/gaudi_nic_ethtool.c
@@ -0,0 +1,616 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Copyright 2018-2020 HabanaLabs, Ltd.
+ * All Rights Reserved.
+ */
+
+#include "gaudi_nic.h"
+#include "../include/gaudi/asic_reg/gaudi_regs.h"
+#include <linux/pci.h>
+
+#define NIC_STATS_LEN ARRAY_SIZE(gaudi_nic_ethtool_stats)
+#define NIC_SPMU0_STATS_LEN ARRAY_SIZE(gaudi_nic0_spmu_event_type)
+#define NIC_SPMU1_STATS_LEN ARRAY_SIZE(gaudi_nic1_spmu_event_type)
+#define NIC_SPMU_STATS_LEN_MAX 6
+#define NIC_MAC_STATS_RX_LEN ARRAY_SIZE(gaudi_nic_mac_stats_rx)
+#define NIC_MAC_STATS_TX_LEN ARRAY_SIZE(gaudi_nic_mac_stats_tx)
+#define NIC_XPCS91_REGS_CNT_LEN ARRAY_SIZE(gaudi_nic_xpcs91_reg_type)
+#define NIC_SW_CNT_LEN ARRAY_SIZE(gaudi_nic_sw_cnt_type)
+
+#define NIC_MAC_STAT_BLOCK_SIZE (mmNIC1_STAT_BASE - mmNIC0_STAT_BASE)
+#define NIC_MAC_STAT_HI_PART mmNIC0_STAT_DATA_HI_REG
+#define NIC_MAC_RX_PORT0_OFFSET mmNIC0_STAT_ETHERSTATSOCTETS
+#define NIC_MAC_RX_PORT1_OFFSET mmNIC0_STAT_ETHERSTATSOCTETS_2
+#define NIC_MAC_TX_PORT0_OFFSET mmNIC0_STAT_ETHERSTATSOCTETS_4
+#define NIC_MAC_TX_PORT1_OFFSET mmNIC0_STAT_ETHERSTATSOCTETS_6
+
+#define NIC_MAC_STAT_BASE(port) \
+ ((u64) (NIC_MAC_STAT_BLOCK_SIZE * (u64) ((port) >> 1)))
+
+#define NIC_MAC_STAT_RREG32(port, reg) \
+ RREG32(NIC_MAC_STAT_BASE(port) + (reg))
+
+#define ethtool_add_mode ethtool_link_ksettings_add_link_mode
+
+struct gaudi_nic_ethtool_stats {
+ char stat_string[ETH_GSTRING_LEN];
+ int stat_offset;
+};
+
+struct gaudi_nic_spmu_event_type {
+ char stat_string[ETH_GSTRING_LEN];
+ int index;
+};
+
+struct gaudi_nic_xpcs91_reg_type {
+ char stat_string[ETH_GSTRING_LEN];
+ int lo_offset;
+ int hi_offset;
+};
+
+struct gaudi_nic_sw_cnt_type {
+ char stat_string[ETH_GSTRING_LEN];
+};
+
+#define NIC_STAT(m) {__stringify(m), offsetof(struct net_device, stats.m)}
+
+static struct gaudi_nic_ethtool_stats gaudi_nic_ethtool_stats[] = {
+ NIC_STAT(rx_packets),
+ NIC_STAT(tx_packets),
+ NIC_STAT(rx_bytes),
+ NIC_STAT(tx_bytes),
+ NIC_STAT(rx_errors),
+ NIC_STAT(tx_errors),
+ NIC_STAT(rx_dropped),
+ NIC_STAT(tx_dropped),
+ NIC_STAT(multicast),
+ NIC_STAT(collisions),
+ NIC_STAT(rx_length_errors),
+ NIC_STAT(rx_over_errors),
+ NIC_STAT(rx_crc_errors),
+ NIC_STAT(rx_frame_errors),
+ NIC_STAT(rx_fifo_errors),
+ NIC_STAT(rx_missed_errors),
+ NIC_STAT(tx_aborted_errors),
+ NIC_STAT(tx_carrier_errors),
+ NIC_STAT(tx_fifo_errors),
+ NIC_STAT(tx_heartbeat_errors),
+ NIC_STAT(tx_window_errors)
+};
+
+static struct gaudi_nic_ethtool_stats gaudi_nic_mac_stats_rx[] = {
+ {"etherStatsOctets", 0x0},
+ {"OctetsReceivedOK", 0x4},
+ {"aAlignmentErrors", 0x8},
+ {"aPAUSEMACCtrlFramesReceived", 0xC},
+ {"aFrameTooLongErrors", 0x10},
+ {"aInRangeLengthErrors", 0x14},
+ {"aFramesReceivedOK", 0x18},
+ {"VLANReceivedOK", 0x1C},
+ {"aFrameCheckSequenceErrors", 0x20},
+ {"ifInErrors", 0x24},
+ {"ifInUcastPkts", 0x28},
+ {"ifInMulticastPkts", 0x2C},
+ {"ifInBroadcastPkts", 0x30},
+ {"etherStatsDropEvents", 0x34},
+ {"etherStatsUndersizePkts", 0x38},
+ {"etherStatsPkts", 0x3C},
+ {"etherStatsPkts64Octets", 0x40},
+ {"etherStatsPkts65to127Octets", 0x44},
+ {"etherStatsPkts128to255Octets", 0x48},
+ {"etherStatsPkts256to511Octets", 0x4C},
+ {"etherStatsPkts512to1023Octets", 0x50},
+ {"etherStatsPkts1024to1518Octets", 0x54},
+ {"etherStatsPkts1519toMaxOctets", 0x58},
+ {"etherStatsOversizePkts", 0x5C},
+ {"etherStatsJabbers", 0x60},
+ {"etherStatsFragments", 0x64},
+ {"aCBFCPAUSEFramesReceived_0", 0x68},
+ {"aCBFCPAUSEFramesReceived_1", 0x6C},
+ {"aCBFCPAUSEFramesReceived_2", 0x70},
+ {"aCBFCPAUSEFramesReceived_3", 0x74},
+ {"aCBFCPAUSEFramesReceived_4", 0x78},
+ {"aCBFCPAUSEFramesReceived_5", 0x7C},
+ {"aCBFCPAUSEFramesReceived_6", 0x80},
+ {"aCBFCPAUSEFramesReceived_7", 0x84},
+ {"aMACControlFramesReceived", 0x88}
+};
+
+static struct gaudi_nic_ethtool_stats gaudi_nic_mac_stats_tx[] = {
+ {"etherStatsOctets", 0x0},
+ {"OctetsTransmittedOK", 0x4},
+ {"aPAUSEMACCtrlFramesTransmitted", 0x8},
+ {"aFramesTransmittedOK", 0xC},
+ {"VLANTransmittedOK", 0x10},
+ {"ifOutErrors", 0x14},
+ {"ifOutUcastPkts", 0x18},
+ {"ifOutMulticastPkts", 0x1C},
+ {"ifOutBroadcastPkts", 0x20},
+ {"etherStatsPkts64Octets", 0x24},
+ {"etherStatsPkts65to127Octets", 0x28},
+ {"etherStatsPkts128to255Octets", 0x2C},
+ {"etherStatsPkts256to511Octets", 0x30},
+ {"etherStatsPkts512to1023Octets", 0x34},
+ {"etherStatsPkts1024to1518Octets", 0x38},
+ {"etherStatsPkts1519toMaxOctets", 0x3C},
+ {"aCBFCPAUSEFramesTransmitted_0", 0x40},
+ {"aCBFCPAUSEFramesTransmitted_1", 0x44},
+ {"aCBFCPAUSEFramesTransmitted_2", 0x48},
+ {"aCBFCPAUSEFramesTransmitted_3", 0x4C},
+ {"aCBFCPAUSEFramesTransmitted_4", 0x50},
+ {"aCBFCPAUSEFramesTransmitted_5", 0x54},
+ {"aCBFCPAUSEFramesTransmitted_6", 0x58},
+ {"aCBFCPAUSEFramesTransmitted_7", 0x5C},
+ {"aMACControlFramesTransmitted", 0x60},
+ {"etherStatsPkts", 0x64}
+};
+
+static struct gaudi_nic_spmu_event_type gaudi_nic0_spmu_event_type[] = {
+ {"requester_psn_out_of_range", 18},
+ {"responder_duplicate_psn", 21},
+ {"responder_out_of_sequence_psn", 22}
+};
+
+static struct gaudi_nic_spmu_event_type gaudi_nic1_spmu_event_type[] = {
+ {"requester_psn_out_of_range", 6},
+ {"responder_duplicate_psn", 9},
+ {"responder_out_of_sequence_psn", 10}
+};
+
+static struct gaudi_nic_xpcs91_reg_type gaudi_nic_xpcs91_reg_type[] = {
+ {"correctable_errors", 0x2, 0x3},
+ {"uncorrectable_errors", 0x4, 0x5}
+};
+
+static struct gaudi_nic_sw_cnt_type gaudi_nic_sw_cnt_type[] = {
+ {"pcs_local_faults"},
+ {"pcs_remote_faults"},
+};
+
+static void gaudi_nic_get_drvinfo(struct net_device *netdev,
+ struct ethtool_drvinfo *drvinfo)
+{
+ struct gaudi_nic_device **ptr = netdev_priv(netdev);
+ struct gaudi_nic_device *gaudi_nic = *ptr;
+ struct hl_device *hdev = gaudi_nic->hdev;
+
+ strlcpy(drvinfo->driver, HL_NAME, sizeof(drvinfo->driver));
+ strlcpy(drvinfo->fw_version, hdev->asic_prop.cpucp_info.cpucp_version,
+ sizeof(drvinfo->fw_version));
+ if (hdev->pdev)
+ strlcpy(drvinfo->bus_info, pci_name(hdev->pdev),
+ sizeof(drvinfo->bus_info));
+}
+
+static int gaudi_nic_get_link_ksettings(struct net_device *netdev,
+ struct ethtool_link_ksettings *cmd)
+{
+ struct gaudi_nic_device **ptr = netdev_priv(netdev);
+ struct gaudi_nic_device *gaudi_nic = *ptr;
+ struct hl_device *hdev = gaudi_nic->hdev;
+ u32 port, speed;
+
+ port = gaudi_nic->port;
+ speed = gaudi_nic->speed;
+
+ cmd->base.speed = speed;
+ cmd->base.duplex = DUPLEX_FULL;
+
+ ethtool_link_ksettings_zero_link_mode(cmd, supported);
+ ethtool_link_ksettings_zero_link_mode(cmd, advertising);
+
+ ethtool_add_mode(cmd, supported, 100000baseCR4_Full);
+ ethtool_add_mode(cmd, supported, 100000baseSR4_Full);
+ ethtool_add_mode(cmd, supported, 100000baseKR4_Full);
+ ethtool_add_mode(cmd, supported, 100000baseLR4_ER4_Full);
+
+ ethtool_add_mode(cmd, supported, 50000baseSR2_Full);
+ ethtool_add_mode(cmd, supported, 50000baseCR2_Full);
+ ethtool_add_mode(cmd, supported, 50000baseKR2_Full);
+
+ if (speed == SPEED_100000) {
+ ethtool_add_mode(cmd, advertising, 100000baseCR4_Full);
+ ethtool_add_mode(cmd, advertising, 100000baseSR4_Full);
+ ethtool_add_mode(cmd, advertising, 100000baseKR4_Full);
+ ethtool_add_mode(cmd, advertising, 100000baseLR4_ER4_Full);
+
+ cmd->base.port = PORT_FIBRE;
+
+ ethtool_add_mode(cmd, supported, FIBRE);
+ ethtool_add_mode(cmd, advertising, FIBRE);
+
+ ethtool_add_mode(cmd, supported, Backplane);
+ ethtool_add_mode(cmd, advertising, Backplane);
+ } else if (speed == SPEED_50000) {
+ ethtool_add_mode(cmd, advertising, 50000baseSR2_Full);
+ ethtool_add_mode(cmd, advertising, 50000baseCR2_Full);
+ ethtool_add_mode(cmd, advertising, 50000baseKR2_Full);
+ } else {
+ dev_err(hdev->dev, "unknown speed %d, port %d\n", speed, port);
+ return -EFAULT;
+ }
+
+ ethtool_add_mode(cmd, supported, Autoneg);
+
+ if (gaudi_nic->auto_neg_enable) {
+ ethtool_add_mode(cmd, advertising, Autoneg);
+ cmd->base.autoneg = AUTONEG_ENABLE;
+ if (gaudi_nic->auto_neg_resolved)
+ ethtool_add_mode(cmd, lp_advertising, Autoneg);
+ } else {
+ cmd->base.autoneg = AUTONEG_DISABLE;
+ }
+
+ ethtool_add_mode(cmd, supported, Pause);
+
+ if (gaudi_nic->pfc_enable)
+ ethtool_add_mode(cmd, advertising, Pause);
+
+ return 0;
+}
+
+static bool check_ksettings(const struct ethtool_link_ksettings *old_cmd,
+ const struct ethtool_link_ksettings *new_cmd)
+{
+ /* only autoneg and speed are mutable */
+ return (old_cmd->base.duplex == new_cmd->base.duplex) &&
+ (old_cmd->base.port == new_cmd->base.port) &&
+ (old_cmd->base.phy_address == new_cmd->base.phy_address) &&
+ (old_cmd->base.eth_tp_mdix_ctrl ==
+ new_cmd->base.eth_tp_mdix_ctrl) &&
+ bitmap_empty(new_cmd->link_modes.advertising,
+ __ETHTOOL_LINK_MODE_MASK_NBITS);
+}
+
+static int gaudi_nic_set_link_ksettings(struct net_device *netdev,
+ const struct ethtool_link_ksettings *cmd)
+{
+ struct gaudi_nic_device **ptr = netdev_priv(netdev);
+ struct ethtool_link_ksettings curr_cmd = {0};
+ struct gaudi_nic_device *gaudi_nic = *ptr;
+ u32 port = gaudi_nic->port;
+ struct hl_device *hdev;
+ bool auto_neg;
+ int rc, speed;
+
+ hdev = gaudi_nic->hdev;
+
+ rc = gaudi_nic_get_link_ksettings(netdev, &curr_cmd);
+ if (rc)
+ return rc;
+
+ if (!check_ksettings(&curr_cmd, cmd))
+ return -EOPNOTSUPP;
+
+ speed = cmd->base.speed;
+ auto_neg = cmd->base.autoneg == AUTONEG_ENABLE;
+
+ switch (speed) {
+ case SPEED_10000:
+ case SPEED_25000:
+ case SPEED_50000:
+ if (gaudi_nic->nic_macro->num_of_lanes == NIC_LANES_4) {
+ dev_err(hdev->dev,
+ "NIC %d with 4 lanes should be used only with speed of 100000Mb/s\n",
+ port);
+ return -EFAULT;
+ }
+ break;
+ case SPEED_100000:
+ break;
+ default:
+ dev_err(hdev->dev, "got invalid speed %dMb/s for NIC %d",
+ speed, port);
+ return -EINVAL;
+ }
+
+ if ((gaudi_nic->speed == speed) &&
+ (gaudi_nic->auto_neg_enable == auto_neg))
+ return 0;
+
+ if (atomic_cmpxchg(&gaudi_nic->in_reset, 0, 1)) {
+ dev_err(hdev->dev, "port %d is in reset, can't change speed",
+ port);
+ return -EBUSY;
+ }
+
+ gaudi_nic->speed = speed;
+ if (auto_neg)
+ hdev->nic_auto_neg_mask |= BIT(port);
+ else
+ hdev->nic_auto_neg_mask &= ~BIT(port);
+
+ if (gaudi_nic->enabled) {
+ rc = gaudi_nic_port_reset(gaudi_nic);
+ if (rc)
+ dev_err(hdev->dev,
+ "Failed to reset NIC %d for speed change, rc %d",
+ port, rc);
+ }
+
+ atomic_set(&gaudi_nic->in_reset, 0);
+
+ return rc;
+}
+
+static u32 gaudi_nic_get_link(struct net_device *netdev)
+{
+ return netif_carrier_ok(netdev);
+}
+
+static void gaudi_nic_get_internal_strings(struct net_device *netdev,
+ u8 *data)
+{
+ struct gaudi_nic_device **ptr = netdev_priv(netdev);
+ struct gaudi_nic_spmu_event_type *spmu_stats;
+ struct gaudi_nic_device *gaudi_nic = *ptr;
+ u32 port = gaudi_nic->port;
+ u32 num_spmus;
+ u32 i;
+
+ if (port & 1) {
+ num_spmus = NIC_SPMU1_STATS_LEN;
+ spmu_stats = gaudi_nic1_spmu_event_type;
+ } else {
+ num_spmus = NIC_SPMU0_STATS_LEN;
+ spmu_stats = gaudi_nic0_spmu_event_type;
+ }
+
+ for (i = 0 ; i < num_spmus ; i++)
+ memcpy(data + i * ETH_GSTRING_LEN,
+ spmu_stats[i].stat_string,
+ ETH_GSTRING_LEN);
+ data += i * ETH_GSTRING_LEN;
+ for (i = 0 ; i < NIC_MAC_STATS_RX_LEN ; i++)
+ memcpy(data + i * ETH_GSTRING_LEN,
+ gaudi_nic_mac_stats_rx[i].stat_string,
+ ETH_GSTRING_LEN);
+ data += i * ETH_GSTRING_LEN;
+ for (i = 0 ; i < NIC_XPCS91_REGS_CNT_LEN ; i++)
+ memcpy(data + i * ETH_GSTRING_LEN,
+ gaudi_nic_xpcs91_reg_type[i].stat_string,
+ ETH_GSTRING_LEN);
+ data += i * ETH_GSTRING_LEN;
+ for (i = 0 ; i < NIC_SW_CNT_LEN ; i++)
+ memcpy(data + i * ETH_GSTRING_LEN,
+ gaudi_nic_sw_cnt_type[i].stat_string,
+ ETH_GSTRING_LEN);
+ data += i * ETH_GSTRING_LEN;
+ for (i = 0 ; i < NIC_MAC_STATS_TX_LEN ; i++)
+ memcpy(data + i * ETH_GSTRING_LEN,
+ gaudi_nic_mac_stats_tx[i].stat_string,
+ ETH_GSTRING_LEN);
+
+}
+
+static void gaudi_nic_get_strings(struct net_device *netdev, u32 stringset,
+ u8 *data)
+{
+ int i;
+
+ if (stringset == ETH_SS_STATS) {
+ for (i = 0; i < NIC_STATS_LEN; i++)
+ memcpy(data + i * ETH_GSTRING_LEN,
+ gaudi_nic_ethtool_stats[i].stat_string,
+ ETH_GSTRING_LEN);
+ gaudi_nic_get_internal_strings(netdev,
+ data + i * ETH_GSTRING_LEN);
+ }
+}
+
+static int gaudi_nic_get_sset_count(struct net_device *netdev, int sset)
+{
+ int num_spmus, mac_counters, xpcs91_counters, sw_counetrs;
+ struct gaudi_nic_device **ptr = netdev_priv(netdev);
+ struct gaudi_nic_device *gaudi_nic = *ptr;
+ u32 port = gaudi_nic->port;
+
+ num_spmus = (port & 1) ? NIC_SPMU1_STATS_LEN : NIC_SPMU0_STATS_LEN;
+ mac_counters = NIC_MAC_STATS_RX_LEN + NIC_MAC_STATS_TX_LEN;
+ xpcs91_counters = NIC_XPCS91_REGS_CNT_LEN;
+ sw_counetrs = NIC_SW_CNT_LEN;
+
+ switch (sset) {
+ case ETH_SS_STATS:
+ return NIC_STATS_LEN + num_spmus + mac_counters +
+ xpcs91_counters + sw_counetrs;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+static u64 gaudi_nic_read_mac_counter(struct hl_device *hdev, u32 port,
+ int offset, bool is_rx)
+{
+ u64 lo_part, hi_part;
+ u64 start_reg;
+
+ if (!hdev->supports_coresight)
+ return 0;
+
+ if (is_rx)
+ if (port & 1)
+ start_reg = NIC_MAC_RX_PORT1_OFFSET;
+ else
+ start_reg = NIC_MAC_RX_PORT0_OFFSET;
+ else
+ if (port & 1)
+ start_reg = NIC_MAC_TX_PORT1_OFFSET;
+ else
+ start_reg = NIC_MAC_TX_PORT0_OFFSET;
+
+ lo_part = NIC_MAC_STAT_RREG32(port, start_reg + offset);
+ /* Volatile read: MUST read high part after low */
+ hi_part = NIC_MAC_STAT_RREG32(port, NIC_MAC_STAT_HI_PART);
+
+ return lo_part | (hi_part << 32);
+}
+
+static void gaudi_nic_read_xpcs91_regs(struct gaudi_nic_device *gaudi_nic,
+ u64 *out_data)
+{
+ u32 lo_part, hi_part, start_lane = __ffs(gaudi_nic->fw_tuning_mask);
+
+ lo_part = gaudi_nic_mac_read(gaudi_nic, start_lane, "xpcs91",
+ gaudi_nic_xpcs91_reg_type[0].lo_offset);
+ hi_part = gaudi_nic_mac_read(gaudi_nic, start_lane, "xpcs91",
+ gaudi_nic_xpcs91_reg_type[0].hi_offset);
+ gaudi_nic->correctable_errors_cnt +=
+ (hi_part << 16) | lo_part;
+ out_data[0] = gaudi_nic->correctable_errors_cnt;
+
+ lo_part = gaudi_nic_mac_read(gaudi_nic, start_lane, "xpcs91",
+ gaudi_nic_xpcs91_reg_type[1].lo_offset);
+ hi_part = gaudi_nic_mac_read(gaudi_nic, start_lane, "xpcs91",
+ gaudi_nic_xpcs91_reg_type[1].hi_offset);
+ gaudi_nic->uncorrectable_errors_cnt +=
+ (hi_part << 16) | lo_part;
+ out_data[1] = gaudi_nic->uncorrectable_errors_cnt;
+}
+
+static void gaudi_nic_read_sw_counters(struct gaudi_nic_device *gaudi_nic,
+ u64 *out_data)
+{
+ out_data[0] = gaudi_nic->pcs_local_fault_cnt;
+ out_data[1] = gaudi_nic->pcs_remote_fault_cnt;
+}
+
+static void gaudi_nic_get_internal_stats(struct net_device *netdev, u64 *data)
+{
+ struct gaudi_nic_device **ptr = netdev_priv(netdev);
+ struct gaudi_nic_device *gaudi_nic = *ptr;
+ struct hl_device *hdev = gaudi_nic->hdev;
+ u32 port = gaudi_nic->port;
+ u32 num_spmus;
+ int i;
+
+ num_spmus = (port & 1) ? NIC_SPMU1_STATS_LEN : NIC_SPMU0_STATS_LEN;
+
+ gaudi_sample_spmu_nic(hdev, port, num_spmus, data);
+ data += num_spmus;
+
+ for (i = 1 ; i < NIC_MAC_STATS_RX_LEN ; i++)
+ data[i] = gaudi_nic_read_mac_counter(hdev, port,
+ gaudi_nic_mac_stats_rx[i].stat_offset, true);
+ data += i;
+
+ gaudi_nic_read_xpcs91_regs(gaudi_nic, data);
+ data += NIC_XPCS91_REGS_CNT_LEN;
+
+ gaudi_nic_read_sw_counters(gaudi_nic, data);
+ data += NIC_SW_CNT_LEN;
+
+ for (i = 1 ; i < NIC_MAC_STATS_TX_LEN ; i++)
+ data[i] = gaudi_nic_read_mac_counter(hdev, port,
+ gaudi_nic_mac_stats_tx[i].stat_offset, false);
+}
+
+static void gaudi_nic_get_ethtool_stats(struct net_device *netdev,
+ struct ethtool_stats *stats, u64 *data)
+{
+ struct gaudi_nic_device **ptr = netdev_priv(netdev);
+ struct gaudi_nic_device *gaudi_nic = *ptr;
+ struct hl_device *hdev = gaudi_nic->hdev;
+ u32 port = gaudi_nic->port;
+ char *p;
+ int i;
+
+ if (disabled_or_in_reset(gaudi_nic)) {
+ dev_info_ratelimited(hdev->dev,
+ "port %d is in reset, can't get ethtool stats", port);
+ return;
+ }
+
+ for (i = 0; i < NIC_STATS_LEN ; i++) {
+ p = (char *) netdev + gaudi_nic_ethtool_stats[i].stat_offset;
+ data[i] = *(u32 *) p;
+ }
+
+ gaudi_nic_get_internal_stats(netdev, data + i);
+}
+
+static int gaudi_nic_get_module_info(struct net_device *netdev,
+ struct ethtool_modinfo *modinfo)
+{
+ modinfo->type = ETH_MODULE_SFF_8636;
+ modinfo->eeprom_len = ETH_MODULE_SFF_8636_LEN;
+
+ return 0;
+}
+
+static int gaudi_nic_get_module_eeprom(struct net_device *netdev,
+ struct ethtool_eeprom *ee, u8 *data)
+{
+ struct gaudi_nic_device **ptr = netdev_priv(netdev);
+ struct gaudi_nic_device *gaudi_nic = *ptr;
+ struct hl_device *hdev = gaudi_nic->hdev;
+ u32 first, last, len;
+
+ if (ee->len == 0)
+ return -EINVAL;
+
+ first = ee->offset;
+ last = ee->offset + ee->len;
+
+ if (first < ETH_MODULE_SFF_8636_LEN) {
+ len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN);
+ len -= first;
+
+ memcpy(data, hdev->asic_prop.cpucp_nic_info.qsfp_eeprom + first,
+ len);
+ }
+
+ return 0;
+}
+
+/* enable spmus for ethtool monitoring */
+void gaudi_nic_spmu_init(struct hl_device *hdev, int port)
+{
+ u32 spmu_events[NIC_SPMU_STATS_LEN_MAX], num_event_types;
+ struct gaudi_nic_spmu_event_type *event_types;
+ int rc, i;
+
+ if (port & 1) {
+ num_event_types = NIC_SPMU1_STATS_LEN;
+ event_types = gaudi_nic1_spmu_event_type;
+ } else {
+ num_event_types = NIC_SPMU0_STATS_LEN;
+ event_types = gaudi_nic0_spmu_event_type;
+ }
+
+ if (num_event_types > NIC_SPMU_STATS_LEN_MAX)
+ num_event_types = NIC_SPMU_STATS_LEN_MAX;
+
+ for (i = 0 ; i < num_event_types ; i++)
+ spmu_events[i] = event_types[i].index;
+
+ rc = gaudi_config_spmu_nic(hdev, port, num_event_types,
+ spmu_events);
+ if (rc)
+ dev_err(hdev->dev,
+ "Failed to configure spmu for NIC port %d\n",
+ port);
+}
+
+u64 gaudi_nic_read_mac_stat_counter(struct hl_device *hdev, u32 port, int idx,
+ bool is_rx)
+{
+ struct gaudi_nic_ethtool_stats *stat = is_rx ?
+ &gaudi_nic_mac_stats_rx[idx] :
+ &gaudi_nic_mac_stats_tx[idx];
+
+ return gaudi_nic_read_mac_counter(hdev, port, stat->stat_offset, is_rx);
+}
+
+const struct ethtool_ops gaudi_nic_ethtool_ops = {
+ .get_drvinfo = gaudi_nic_get_drvinfo,
+ .get_link_ksettings = gaudi_nic_get_link_ksettings,
+ .set_link_ksettings = gaudi_nic_set_link_ksettings,
+ .get_link = gaudi_nic_get_link,
+ .get_strings = gaudi_nic_get_strings,
+ .get_sset_count = gaudi_nic_get_sset_count,
+ .get_ethtool_stats = gaudi_nic_get_ethtool_stats,
+ .get_module_info = gaudi_nic_get_module_info,
+ .get_module_eeprom = gaudi_nic_get_module_eeprom,
+};
+
--
2.17.1
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  Last update: 2020-09-15 19:34    [W:0.201 / U:4.892 seconds]
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