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net: ti: icssg-prueth: Add ICSSG FW Stats

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The ICSSG firmware maintains set of stats called PA_STATS.
Currently the driver only dumps 4 stats. Add support for dumping more
stats.

The offset for different stats are defined as MACROs in icssg_switch_map.h
file. All the offsets are for Slice0. Slice1 offsets are slice0 + 4.
The offset calculation is taken care while reading the stats in
emac_update_hardware_stats().

The statistics are documented in
Documentation/networking/device_drivers/icssg_prueth.rst

Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Link: https://patch.msgid.link/20250424095316.2643573-1-danishanwar@ti.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
MD Danish Anwar 2025-04-24 15:23:16 +05:30 committed by Jakub Kicinski
parent a427e7f99b
commit 0d15a26b24
7 changed files with 151 additions and 31 deletions
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1
Documentation/networking/device_drivers/ethernet/index.rst
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@ -55,6 +55,7 @@ Contents:
ti/cpsw_switchdev ti/cpsw_switchdev
ti/am65_nuss_cpsw_switchdev ti/am65_nuss_cpsw_switchdev
ti/tlan ti/tlan
ti/icssg_prueth
wangxun/txgbe wangxun/txgbe
wangxun/ngbe wangxun/ngbe

56
Documentation/networking/device_drivers/ethernet/ti/icssg_prueth.rst Normal file
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@ -0,0 +1,56 @@
.. SPDX-License-Identifier: GPL-2.0
==============================================
Texas Instruments ICSSG PRUETH ethernet driver
==============================================
:Version: 1.0
ICSSG Firmware
==============
Every ICSSG core has two Programmable Real-Time Unit(PRUs), two auxiliary
Real-Time Transfer Unit (RTUs), and two Transmit Real-Time Transfer Units
(TX_PRUs). Each one of these runs its own firmware. The firmwares combnined are
referred as ICSSG Firmware.
Firmware Statistics
===================
The ICSSG firmware maintains certain statistics which are dumped by the driver
via ``ethtool -S <interface>``
These statistics are as follows,
- ``FW_RTU_PKT_DROP``: Diagnostic error counter which increments when RTU drops a locally injected packet due to port being disabled or rule violation.
- ``FW_Q0_OVERFLOW``: TX overflow counter for queue0
- ``FW_Q1_OVERFLOW``: TX overflow counter for queue1
- ``FW_Q2_OVERFLOW``: TX overflow counter for queue2
- ``FW_Q3_OVERFLOW``: TX overflow counter for queue3
- ``FW_Q4_OVERFLOW``: TX overflow counter for queue4
- ``FW_Q5_OVERFLOW``: TX overflow counter for queue5
- ``FW_Q6_OVERFLOW``: TX overflow counter for queue6
- ``FW_Q7_OVERFLOW``: TX overflow counter for queue7
- ``FW_DROPPED_PKT``: This counter is incremented when a packet is dropped at PRU because of rule violation.
- ``FW_RX_ERROR``: Incremented if there was a CRC error or Min/Max frame error at PRU
- ``FW_RX_DS_INVALID``: Incremented when RTU detects Data Status invalid condition
- ``FW_TX_DROPPED_PACKET``: Counter for packets dropped via TX Port
- ``FW_TX_TS_DROPPED_PACKET``: Counter for packets with TS flag dropped via TX Port
- ``FW_INF_PORT_DISABLED``: Incremented when RX frame is dropped due to port being disabled
- ``FW_INF_SAV``: Incremented when RX frame is dropped due to Source Address violation
- ``FW_INF_SA_DL``: Incremented when RX frame is dropped due to Source Address being in the denylist
- ``FW_INF_PORT_BLOCKED``: Incremented when RX frame is dropped due to port being blocked and frame being a special frame
- ``FW_INF_DROP_TAGGED`` : Incremented when RX frame is dropped for being tagged
- ``FW_INF_DROP_PRIOTAGGED``: Incremented when RX frame is dropped for being priority tagged
- ``FW_INF_DROP_NOTAG``: Incremented when RX frame is dropped for being untagged
- ``FW_INF_DROP_NOTMEMBER``: Incremented when RX frame is dropped for port not being member of VLAN
- ``FW_RX_EOF_SHORT_FRMERR``: Incremented if End Of Frame (EOF) task is scheduled without seeing RX_B1
- ``FW_RX_B0_DROP_EARLY_EOF``: Incremented when frame is dropped due to Early EOF
- ``FW_TX_JUMBO_FRM_CUTOFF``: Incremented when frame is cut off to prevent packet size > 2000 Bytes
- ``FW_RX_EXP_FRAG_Q_DROP``: Incremented when express frame is received in the same queue as the previous fragment
- ``FW_RX_FIFO_OVERRUN``: RX fifo overrun counter
- ``FW_CUT_THR_PKT``: Incremented when a packet is forwarded using Cut-Through forwarding method
- ``FW_HOST_RX_PKT_CNT``: Number of valid packets sent by Rx PRU to Host on PSI
- ``FW_HOST_TX_PKT_CNT``: Number of valid packets copied by RTU0 to Tx queues
- ``FW_HOST_EGRESS_Q_PRE_OVERFLOW``: Host Egress Q (Pre-emptible) Overflow Counter
- ``FW_HOST_EGRESS_Q_EXP_OVERFLOW``: Host Egress Q (Pre-emptible) Overflow Counter

24
drivers/net/ethernet/ti/icssg/icssg_common.c
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@ -1318,10 +1318,28 @@ void icssg_ndo_get_stats64(struct net_device *ndev,
stats->rx_over_errors = emac_get_stat_by_name(emac, "rx_over_errors"); stats->rx_over_errors = emac_get_stat_by_name(emac, "rx_over_errors");
stats->multicast = emac_get_stat_by_name(emac, "rx_multicast_frames"); stats->multicast = emac_get_stat_by_name(emac, "rx_multicast_frames");
stats->rx_errors = ndev->stats.rx_errors; stats->rx_errors = ndev->stats.rx_errors +
stats->rx_dropped = ndev->stats.rx_dropped; emac_get_stat_by_name(emac, "FW_RX_ERROR") +
emac_get_stat_by_name(emac, "FW_RX_EOF_SHORT_FRMERR") +
emac_get_stat_by_name(emac, "FW_RX_B0_DROP_EARLY_EOF") +
emac_get_stat_by_name(emac, "FW_RX_EXP_FRAG_Q_DROP") +
emac_get_stat_by_name(emac, "FW_RX_FIFO_OVERRUN");
stats->rx_dropped = ndev->stats.rx_dropped +
emac_get_stat_by_name(emac, "FW_DROPPED_PKT") +
emac_get_stat_by_name(emac, "FW_INF_PORT_DISABLED") +
emac_get_stat_by_name(emac, "FW_INF_SAV") +
emac_get_stat_by_name(emac, "FW_INF_SA_DL") +
emac_get_stat_by_name(emac, "FW_INF_PORT_BLOCKED") +
emac_get_stat_by_name(emac, "FW_INF_DROP_TAGGED") +
emac_get_stat_by_name(emac, "FW_INF_DROP_PRIOTAGGED") +
emac_get_stat_by_name(emac, "FW_INF_DROP_NOTAG") +
emac_get_stat_by_name(emac, "FW_INF_DROP_NOTMEMBER");
stats->tx_errors = ndev->stats.tx_errors; stats->tx_errors = ndev->stats.tx_errors;
stats->tx_dropped = ndev->stats.tx_dropped; stats->tx_dropped = ndev->stats.tx_dropped +
emac_get_stat_by_name(emac, "FW_RTU_PKT_DROP") +
emac_get_stat_by_name(emac, "FW_TX_DROPPED_PACKET") +
emac_get_stat_by_name(emac, "FW_TX_TS_DROPPED_PACKET") +
emac_get_stat_by_name(emac, "FW_TX_JUMBO_FRM_CUTOFF");
} }
EXPORT_SYMBOL_GPL(icssg_ndo_get_stats64); EXPORT_SYMBOL_GPL(icssg_ndo_get_stats64);

2
drivers/net/ethernet/ti/icssg/icssg_prueth.h
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@ -54,7 +54,7 @@
#define ICSSG_MAX_RFLOWS 8 /* per slice */ #define ICSSG_MAX_RFLOWS 8 /* per slice */
#define ICSSG_NUM_PA_STATS 4 #define ICSSG_NUM_PA_STATS 32
#define ICSSG_NUM_MIIG_STATS 60 #define ICSSG_NUM_MIIG_STATS 60
/* Number of ICSSG related stats */ /* Number of ICSSG related stats */
#define ICSSG_NUM_STATS (ICSSG_NUM_MIIG_STATS + ICSSG_NUM_PA_STATS) #define ICSSG_NUM_STATS (ICSSG_NUM_MIIG_STATS + ICSSG_NUM_PA_STATS)

8
drivers/net/ethernet/ti/icssg/icssg_stats.c
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@ -11,7 +11,6 @@
#define ICSSG_TX_PACKET_OFFSET 0xA0 #define ICSSG_TX_PACKET_OFFSET 0xA0
#define ICSSG_TX_BYTE_OFFSET 0xEC #define ICSSG_TX_BYTE_OFFSET 0xEC
#define ICSSG_FW_STATS_BASE 0x0248
static u32 stats_base[] = { 0x54c, /* Slice 0 stats start */ static u32 stats_base[] = { 0x54c, /* Slice 0 stats start */
0xb18, /* Slice 1 stats start */ 0xb18, /* Slice 1 stats start */
@ -46,9 +45,8 @@ void emac_update_hardware_stats(struct prueth_emac *emac)
if (prueth->pa_stats) { if (prueth->pa_stats) {
for (i = 0; i < ARRAY_SIZE(icssg_all_pa_stats); i++) { for (i = 0; i < ARRAY_SIZE(icssg_all_pa_stats); i++) {
reg = ICSSG_FW_STATS_BASE + reg = icssg_all_pa_stats[i].offset +
icssg_all_pa_stats[i].offset * slice * sizeof(u32);
PRUETH_NUM_MACS + slice * sizeof(u32);
regmap_read(prueth->pa_stats, reg, &val); regmap_read(prueth->pa_stats, reg, &val);
emac->pa_stats[i] += val; emac->pa_stats[i] += val;
} }
@ -80,7 +78,7 @@ int emac_get_stat_by_name(struct prueth_emac *emac, char *stat_name)
if (emac->prueth->pa_stats) { if (emac->prueth->pa_stats) {
for (i = 0; i < ARRAY_SIZE(icssg_all_pa_stats); i++) { for (i = 0; i < ARRAY_SIZE(icssg_all_pa_stats); i++) {
if (!strcmp(icssg_all_pa_stats[i].name, stat_name)) if (!strcmp(icssg_all_pa_stats[i].name, stat_name))
return emac->pa_stats[icssg_all_pa_stats[i].offset / sizeof(u32)]; return emac->pa_stats[i];
} }
} }

58
drivers/net/ethernet/ti/icssg/icssg_stats.h
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@ -155,24 +155,10 @@ static const struct icssg_miig_stats icssg_all_miig_stats[] = {
ICSSG_MIIG_STATS(tx_bytes, true), ICSSG_MIIG_STATS(tx_bytes, true),
}; };
/** #define ICSSG_PA_STATS(field) \
* struct pa_stats_regs - ICSSG Firmware maintained PA Stats register { \
* @fw_rx_cnt: Number of valid packets sent by Rx PRU to Host on PSI #field, \
* @fw_tx_cnt: Number of valid packets copied by RTU0 to Tx queues field, \
* @fw_tx_pre_overflow: Host Egress Q (Pre-emptible) Overflow Counter
* @fw_tx_exp_overflow: Host Egress Q (Express) Overflow Counter
*/
struct pa_stats_regs {
u32 fw_rx_cnt;
u32 fw_tx_cnt;
u32 fw_tx_pre_overflow;
u32 fw_tx_exp_overflow;
};
#define ICSSG_PA_STATS(field) \
{ \
#field, \
offsetof(struct pa_stats_regs, field), \
} }
struct icssg_pa_stats { struct icssg_pa_stats {
@ -181,10 +167,38 @@ struct icssg_pa_stats {
}; };
static const struct icssg_pa_stats icssg_all_pa_stats[] = { static const struct icssg_pa_stats icssg_all_pa_stats[] = {
ICSSG_PA_STATS(fw_rx_cnt), ICSSG_PA_STATS(FW_RTU_PKT_DROP),
ICSSG_PA_STATS(fw_tx_cnt), ICSSG_PA_STATS(FW_Q0_OVERFLOW),
ICSSG_PA_STATS(fw_tx_pre_overflow), ICSSG_PA_STATS(FW_Q1_OVERFLOW),
ICSSG_PA_STATS(fw_tx_exp_overflow), ICSSG_PA_STATS(FW_Q2_OVERFLOW),
ICSSG_PA_STATS(FW_Q3_OVERFLOW),
ICSSG_PA_STATS(FW_Q4_OVERFLOW),
ICSSG_PA_STATS(FW_Q5_OVERFLOW),
ICSSG_PA_STATS(FW_Q6_OVERFLOW),
ICSSG_PA_STATS(FW_Q7_OVERFLOW),
ICSSG_PA_STATS(FW_DROPPED_PKT),
ICSSG_PA_STATS(FW_RX_ERROR),
ICSSG_PA_STATS(FW_RX_DS_INVALID),
ICSSG_PA_STATS(FW_TX_DROPPED_PACKET),
ICSSG_PA_STATS(FW_TX_TS_DROPPED_PACKET),
ICSSG_PA_STATS(FW_INF_PORT_DISABLED),
ICSSG_PA_STATS(FW_INF_SAV),
ICSSG_PA_STATS(FW_INF_SA_DL),
ICSSG_PA_STATS(FW_INF_PORT_BLOCKED),
ICSSG_PA_STATS(FW_INF_DROP_TAGGED),
ICSSG_PA_STATS(FW_INF_DROP_PRIOTAGGED),
ICSSG_PA_STATS(FW_INF_DROP_NOTAG),
ICSSG_PA_STATS(FW_INF_DROP_NOTMEMBER),
ICSSG_PA_STATS(FW_RX_EOF_SHORT_FRMERR),
ICSSG_PA_STATS(FW_RX_B0_DROP_EARLY_EOF),
ICSSG_PA_STATS(FW_TX_JUMBO_FRM_CUTOFF),
ICSSG_PA_STATS(FW_RX_EXP_FRAG_Q_DROP),
ICSSG_PA_STATS(FW_RX_FIFO_OVERRUN),
ICSSG_PA_STATS(FW_CUT_THR_PKT),
ICSSG_PA_STATS(FW_HOST_RX_PKT_CNT),
ICSSG_PA_STATS(FW_HOST_TX_PKT_CNT),
ICSSG_PA_STATS(FW_HOST_EGRESS_Q_PRE_OVERFLOW),
ICSSG_PA_STATS(FW_HOST_EGRESS_Q_EXP_OVERFLOW),
}; };
#endif /* __NET_TI_ICSSG_STATS_H */ #endif /* __NET_TI_ICSSG_STATS_H */

33
drivers/net/ethernet/ti/icssg/icssg_switch_map.h
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@ -231,4 +231,37 @@
/* Start of 32 bits PA_STAT counters */ /* Start of 32 bits PA_STAT counters */
#define PA_STAT_32b_START_OFFSET 0x0080 #define PA_STAT_32b_START_OFFSET 0x0080
#define FW_RTU_PKT_DROP 0x0088
#define FW_Q0_OVERFLOW 0x0090
#define FW_Q1_OVERFLOW 0x0098
#define FW_Q2_OVERFLOW 0x00A0
#define FW_Q3_OVERFLOW 0x00A8
#define FW_Q4_OVERFLOW 0x00B0
#define FW_Q5_OVERFLOW 0x00B8
#define FW_Q6_OVERFLOW 0x00C0
#define FW_Q7_OVERFLOW 0x00C8
#define FW_DROPPED_PKT 0x00F8
#define FW_RX_ERROR 0x0100
#define FW_RX_DS_INVALID 0x0108
#define FW_TX_DROPPED_PACKET 0x0110
#define FW_TX_TS_DROPPED_PACKET 0x0118
#define FW_INF_PORT_DISABLED 0x0120
#define FW_INF_SAV 0x0128
#define FW_INF_SA_DL 0x0130
#define FW_INF_PORT_BLOCKED 0x0138
#define FW_INF_DROP_TAGGED 0x0140
#define FW_INF_DROP_PRIOTAGGED 0x0148
#define FW_INF_DROP_NOTAG 0x0150
#define FW_INF_DROP_NOTMEMBER 0x0158
#define FW_RX_EOF_SHORT_FRMERR 0x0188
#define FW_RX_B0_DROP_EARLY_EOF 0x0190
#define FW_TX_JUMBO_FRM_CUTOFF 0x0198
#define FW_RX_EXP_FRAG_Q_DROP 0x01A0
#define FW_RX_FIFO_OVERRUN 0x01A8
#define FW_CUT_THR_PKT 0x01B0
#define FW_HOST_RX_PKT_CNT 0x0248
#define FW_HOST_TX_PKT_CNT 0x0250
#define FW_HOST_EGRESS_Q_PRE_OVERFLOW 0x0258
#define FW_HOST_EGRESS_Q_EXP_OVERFLOW 0x0260
#endif /* __NET_TI_ICSSG_SWITCH_MAP_H */ #endif /* __NET_TI_ICSSG_SWITCH_MAP_H */