[PATCH net-next] octeontx2-af: Show DMAC filter drop count

From: nshettyj

Date: Tue Sep 01 2026 - 00:25:55 EST

From: Hariprasad Kelam <hkelam@xxxxxxxxxxx>

Show the number of packets dropped by DMAC filters in the CGX/RPM
debugfs mac_filter entry.

CGX uses RX_STAT4 for this counter, while RPM/RPM2 use RX_STAT2.

Signed-off-by: Hariprasad Kelam <hkelam@xxxxxxxxxxx>
Signed-off-by: Nitin Shetty J <nshettyj@xxxxxxxxxxx>
---
.../net/ethernet/marvell/octeontx2/af/cgx.c | 13 +++++-
.../net/ethernet/marvell/octeontx2/af/cgx.h | 2 +
.../marvell/octeontx2/af/lmac_common.h | 2 +
.../net/ethernet/marvell/octeontx2/af/rpm.c | 40 +++++++++++++------
.../net/ethernet/marvell/octeontx2/af/rpm.h | 2 +
.../net/ethernet/marvell/octeontx2/af/rvu.h | 1 +
.../ethernet/marvell/octeontx2/af/rvu_cgx.c | 12 ++++++
.../marvell/octeontx2/af/rvu_debugfs.c | 8 ++++
8 files changed, 67 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
index f5fd6138c352..3696bec7a8fc 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
@@ -752,6 +752,16 @@ u64 cgx_features_get(void *cgxd)
return ((struct cgx *)cgxd)->hw_features;
}

+u64 cgx_get_dmacflt_dropped_pktcnt(void *cgxd, int lmac_id)
+{
+ struct cgx *cgx = cgxd;
+
+ if (!is_lmac_valid(cgx, lmac_id))
+ return 0;
+
+ return cgx_read(cgx, lmac_id, CGXX_CMRX_RX_STAT4);
+}
+
int cgx_stats_reset(void *cgxd, int lmac_id)
{
struct cgx *cgx = cgxd;
@@ -1943,7 +1953,8 @@ static struct mac_ops cgx_mac_ops = {
.pfc_config = cgx_lmac_pfc_config,
.mac_get_pfc_frm_cfg = cgx_lmac_get_pfc_frm_cfg,
.mac_reset = cgx_lmac_reset,
- .mac_stats_reset = cgx_stats_reset,
+ .get_dmacflt_dropped_pktcnt = cgx_get_dmacflt_dropped_pktcnt,
+ .mac_stats_reset = cgx_stats_reset,
.mac_x2p_reset = cgx_x2p_reset,
.mac_enadis_rx = cgx_enadis_rx,
};
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/cgx.h b/drivers/net/ethernet/marvell/octeontx2/af/cgx.h
index 8411a75dd723..cd8858c4e41c 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/cgx.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/cgx.h
@@ -39,6 +39,7 @@
#define CGXX_CMRX_INT_ENA_W1S 0x058
#define CGXX_CMRX_RX_ID_MAP 0x060
#define CGXX_CMRX_RX_STAT0 0x070
+#define CGXX_CMRX_RX_STAT4 0x090
#define CGXX_CMRX_RX_LOGL_XON 0x100
#define CGXX_CMRX_RX_LMACS 0x128
#define CGXX_CMRX_RX_DMAC_CTL0 (0x1F8 + mac_ops->csr_offset)
@@ -187,5 +188,6 @@ int cgx_lmac_get_pfc_frm_cfg(void *cgxd, int lmac_id, u8 *tx_pause,
int verify_lmac_fc_cfg(void *cgxd, int lmac_id, u8 tx_pause, u8 rx_pause,
int pfvf_idx);
int cgx_lmac_reset(void *cgxd, int lmac_id, u8 pf_req_flr);
+u64 cgx_get_dmacflt_dropped_pktcnt(void *cgx, int lmac_id);
u32 cgx_get_fifo_len(void *cgxd);
#endif /* CGX_H */
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/lmac_common.h b/drivers/net/ethernet/marvell/octeontx2/af/lmac_common.h
index 6180e68e1765..f07139e1f4ce 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/lmac_common.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/lmac_common.h
@@ -128,6 +128,8 @@ struct mac_ops {
u8 *tx_pause, u8 *rx_pause);
int (*mac_reset)(void *cgxd, int lmac_id, u8 pf_req_flr);

+ u64 (*get_dmacflt_dropped_pktcnt)(void *cgxd, int lmac_id);
+
/* FEC stats */
int (*get_fec_stats)(void *cgxd, int lmac_id,
struct cgx_fec_stats_rsp *rsp);
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rpm.c b/drivers/net/ethernet/marvell/octeontx2/af/rpm.c
index 2e9945446199..d46e8ec7230f 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rpm.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rpm.c
@@ -29,18 +29,19 @@ static struct mac_ops rpm_mac_ops = {
.mac_get_tx_stats = rpm_get_tx_stats,
.get_fec_stats = rpm_get_fec_stats,
.mac_enadis_rx_pause_fwding = rpm_lmac_enadis_rx_pause_fwding,
- .mac_get_pause_frm_status = rpm_lmac_get_pause_frm_status,
- .mac_enadis_pause_frm = rpm_lmac_enadis_pause_frm,
- .mac_pause_frm_config = rpm_lmac_pause_frm_config,
- .mac_enadis_ptp_config = rpm_lmac_ptp_config,
- .mac_rx_tx_enable = rpm_lmac_rx_tx_enable,
- .mac_tx_enable = rpm_lmac_tx_enable,
- .pfc_config = rpm_lmac_pfc_config,
- .mac_get_pfc_frm_cfg = rpm_lmac_get_pfc_frm_cfg,
- .mac_reset = rpm_lmac_reset,
- .mac_stats_reset = rpm_stats_reset,
- .mac_x2p_reset = rpm_x2p_reset,
- .mac_enadis_rx = rpm_enadis_rx,
+ .mac_get_pause_frm_status = rpm_lmac_get_pause_frm_status,
+ .mac_enadis_pause_frm = rpm_lmac_enadis_pause_frm,
+ .mac_pause_frm_config = rpm_lmac_pause_frm_config,
+ .mac_enadis_ptp_config = rpm_lmac_ptp_config,
+ .mac_rx_tx_enable = rpm_lmac_rx_tx_enable,
+ .mac_tx_enable = rpm_lmac_tx_enable,
+ .pfc_config = rpm_lmac_pfc_config,
+ .mac_get_pfc_frm_cfg = rpm_lmac_get_pfc_frm_cfg,
+ .mac_reset = rpm_lmac_reset,
+ .get_dmacflt_dropped_pktcnt = rpm_get_dmacflt_dropped_pktcnt,
+ .mac_stats_reset = rpm_stats_reset,
+ .mac_x2p_reset = rpm_x2p_reset,
+ .mac_enadis_rx = rpm_enadis_rx,
};

static struct mac_ops rpm2_mac_ops = {
@@ -73,6 +74,7 @@ static struct mac_ops rpm2_mac_ops = {
.pfc_config = rpm_lmac_pfc_config,
.mac_get_pfc_frm_cfg = rpm_lmac_get_pfc_frm_cfg,
.mac_reset = rpm_lmac_reset,
+ .get_dmacflt_dropped_pktcnt = rpm_get_dmacflt_dropped_pktcnt,
.mac_stats_reset = rpm_stats_reset,
.mac_x2p_reset = rpm_x2p_reset,
.mac_enadis_rx = rpm_enadis_rx,
@@ -449,6 +451,20 @@ int rpm_get_tx_stats(void *rpmd, int lmac_id, int idx, u64 *tx_stat)
return 0;
}

+u64 rpm_get_dmacflt_dropped_pktcnt(void *rpmd, int lmac_id)
+{
+ rpm_t *rpm = rpmd;
+ u64 dmac_flt_stat;
+
+ if (!is_lmac_valid(rpm, lmac_id))
+ return 0;
+
+ dmac_flt_stat = is_dev_rpm2(rpm) ? RPM2_CMRX_RX_STAT2 :
+ RPMX_CMRX_RX_STAT2;
+
+ return rpm_read(rpm, lmac_id, dmac_flt_stat);
+}
+
int rpm_stats_reset(void *rpmd, int lmac_id)
{
rpm_t *rpm = rpmd;
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rpm.h b/drivers/net/ethernet/marvell/octeontx2/af/rpm.h
index b8d3972e096a..443481010aba 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rpm.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rpm.h
@@ -60,6 +60,7 @@
#define RPMX_MTI_STAT_RX_STAT_PAGES_COUNTERX 0x12000
#define RPMX_MTI_STAT_TX_STAT_PAGES_COUNTERX 0x13000
#define RPMX_MTI_STAT_DATA_HI_CDC 0x10038
+#define RPMX_CMRX_RX_STAT2 0x4010

#define RPM_LMAC_FWI 0xa
#define RPM_TX_EN BIT_ULL(0)
@@ -129,6 +130,7 @@ int rpm_lmac_enadis_pause_frm(void *rpmd, int lmac_id, u8 tx_pause,
u8 rx_pause);
int rpm_get_tx_stats(void *rpmd, int lmac_id, int idx, u64 *tx_stat);
int rpm_get_rx_stats(void *rpmd, int lmac_id, int idx, u64 *rx_stat);
+u64 rpm_get_dmacflt_dropped_pktcnt(void *rpmd, int lmac_id);
void rpm_lmac_ptp_config(void *rpmd, int lmac_id, bool enable);
int rpm_lmac_rx_tx_enable(void *rpmd, int lmac_id, bool enable);
int rpm_lmac_tx_enable(void *rpmd, int lmac_id, bool enable);
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
index 094227404ef9..9afb7ac8969b 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
@@ -1127,6 +1127,7 @@ int rvu_cgx_prio_flow_ctrl_cfg(struct rvu *rvu, u16 pcifunc, u8 tx_pause, u8 rx_
u16 pfc_en);
int rvu_cgx_cfg_pause_frm(struct rvu *rvu, u16 pcifunc, u8 tx_pause, u8 rx_pause);
void rvu_mac_reset(struct rvu *rvu, u16 pcifunc);
+u64 rvu_cgx_get_dmacflt_dropped_pktcnt(void *cgxd, int lmac_id);
u32 rvu_cgx_get_lmac_fifolen(struct rvu *rvu, int cgx, int lmac);
void cgx_start_linkup(struct rvu *rvu);
int npc_get_nixlf_mcam_index(struct npc_mcam *mcam,
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c
index 87d21889dc49..41f157ea27f4 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c
@@ -1356,6 +1356,18 @@ void rvu_mac_reset(struct rvu *rvu, u16 pcifunc)
dev_err(rvu->dev, "Failed to reset MAC\n");
}

+u64 rvu_cgx_get_dmacflt_dropped_pktcnt(void *cgxd, int lmac_id)
+{
+ struct mac_ops *mac_ops;
+
+ mac_ops = get_mac_ops(cgxd);
+
+ if (!mac_ops || !mac_ops->get_dmacflt_dropped_pktcnt)
+ return 0;
+
+ return mac_ops->get_dmacflt_dropped_pktcnt(cgxd, lmac_id);
+}
+
/* Do not allow CGX-mapped VFs to overwrite PKIND when special parse kinds
* (HiGig, EDSA, etc.) are in use on the shared LMAC. VFs must not program
* NPC_TX_DEF_PKIND on NIX_AF_LFX_TX_PARSE_CFG in that case: the PF owns
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
index 3456313d3b3c..e6ccaa29e05c 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
@@ -2957,8 +2957,10 @@ static int cgx_print_dmac_flt(struct seq_file *s, int lmac_id)
struct rvu_cgx_lmac_dbgfs_ctx *dctx = s->private;
struct rvu *rvu = dctx->rvu;
struct pci_dev *pdev = NULL;
+ struct mac_ops *mac_ops;
void *cgxd = dctx->cgxd;
char *bcast, *mcast;
+ u64 drop_cnt;
u16 index, domain;
u8 dmac[ETH_ALEN];
u64 cfg, mac;
@@ -2997,6 +2999,12 @@ static int cgx_print_dmac_flt(struct seq_file *s, int lmac_id)
}
}

+ mac_ops = get_mac_ops(cgxd);
+ if (mac_ops && mac_ops->get_dmacflt_dropped_pktcnt) {
+ drop_cnt = rvu_cgx_get_dmacflt_dropped_pktcnt(cgxd, lmac_id);
+ seq_printf(s, "\nDMAC filter drop count: %llu\n", drop_cnt);
+ }
+
pci_dev_put(pdev);
return 0;
}
--
2.48.1