sfxge(4): decode Medford2 FEC stats if available

Decode Medford2 FEC stats if available in MAC stats DMA buffer.

Submitted by:   Andy Moreton <amoreton at solarflare.com>
Sponsored by:   Solarflare Communications, Inc.
Differential Revision:  https://reviews.freebsd.org/D18178

3 files changed, 50 insertions, 0 deletions

diff --git a/sys/dev/sfxge/common/ef10_mac.c b/sys/dev/sfxge/common/ef10_mac.c
index d7d5d44ecb25..8177c1943b64 100644
--- a/sys/dev/sfxge/common/ef10_mac.c
+++ b/sys/dev/sfxge/common/ef10_mac.c
@@ -550,8 +550,20 @@ ef10_mac_stats_get_mask(
 			goto fail6;
 	}
 
+	if (encp->enc_fec_counters) {
+		const struct efx_mac_stats_range ef10_fec[] = {
+			{ EFX_MAC_FEC_UNCORRECTED_ERRORS,
+			    EFX_MAC_FEC_CORRECTED_SYMBOLS_LANE3 },
+		};
+		if ((rc = efx_mac_stats_mask_add_ranges(maskp, mask_size,
+		    ef10_fec, EFX_ARRAY_SIZE(ef10_fec))) != 0)
+			goto fail7;
+	}
+
 	return (0);
 
+fail7:
+	EFSYS_PROBE(fail7);
 fail6:
 	EFSYS_PROBE(fail6);
 fail5:
@@ -907,6 +919,38 @@ ef10_mac_stats_update(
 	EF10_MAC_STAT_READ(esmp, MC_CMD_MAC_VADAPTER_TX_OVERFLOW, &value);
 	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_VADAPTER_TX_OVERFLOW]), &value);
 
+
+	if (encp->enc_mac_stats_nstats < MC_CMD_MAC_NSTATS_V2)
+		goto done;
+
+	/* FEC */
+	EF10_MAC_STAT_READ(esmp, MC_CMD_MAC_FEC_UNCORRECTED_ERRORS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_FEC_UNCORRECTED_ERRORS]), &value);
+
+	EF10_MAC_STAT_READ(esmp, MC_CMD_MAC_FEC_CORRECTED_ERRORS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_FEC_CORRECTED_ERRORS]), &value);
+
+	EF10_MAC_STAT_READ(esmp, MC_CMD_MAC_FEC_CORRECTED_SYMBOLS_LANE0,
+	    &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_FEC_CORRECTED_SYMBOLS_LANE0]),
+	    &value);
+
+	EF10_MAC_STAT_READ(esmp, MC_CMD_MAC_FEC_CORRECTED_SYMBOLS_LANE1,
+	    &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_FEC_CORRECTED_SYMBOLS_LANE1]),
+	    &value);
+
+	EF10_MAC_STAT_READ(esmp, MC_CMD_MAC_FEC_CORRECTED_SYMBOLS_LANE2,
+	    &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_FEC_CORRECTED_SYMBOLS_LANE2]),
+	    &value);
+
+	EF10_MAC_STAT_READ(esmp, MC_CMD_MAC_FEC_CORRECTED_SYMBOLS_LANE3,
+	    &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_FEC_CORRECTED_SYMBOLS_LANE3]),
+	    &value);
+
+done:
 	/* Read START generation counter */
 	EFSYS_DMA_SYNC_FOR_KERNEL(esmp, 0, EFSYS_MEM_SIZE(esmp));
 	EFSYS_MEM_READ_BARRIER();
diff --git a/sys/dev/sfxge/common/ef10_nic.c b/sys/dev/sfxge/common/ef10_nic.c
index b69884983fa8..124185ecef2a 100644
--- a/sys/dev/sfxge/common/ef10_nic.c
+++ b/sys/dev/sfxge/common/ef10_nic.c
@@ -1212,6 +1212,11 @@ ef10_get_datapath_caps(
 		encp->enc_mac_stats_nstats = MC_CMD_MAC_NSTATS;
 	}
 
+	if (encp->enc_mac_stats_nstats >= MC_CMD_MAC_NSTATS_V2)
+		encp->enc_fec_counters = B_TRUE;
+	else
+		encp->enc_fec_counters = B_FALSE;
+
 #undef CAP_FLAGS1
 #undef CAP_FLAGS2
 
diff --git a/sys/dev/sfxge/common/efx.h b/sys/dev/sfxge/common/efx.h
index cf4d862afe2e..abd0bb570667 100644
--- a/sys/dev/sfxge/common/efx.h
+++ b/sys/dev/sfxge/common/efx.h
@@ -1268,6 +1268,7 @@ typedef struct efx_nic_cfg_s {
 	uint32_t		enc_nvram_update_verify_result_supported;
 	/* Firmware support for extended MAC_STATS buffer */
 	uint32_t		enc_mac_stats_nstats;
+	boolean_t		enc_fec_counters;
 } efx_nic_cfg_t;
 
 #define	EFX_PCI_FUNCTION_IS_PF(_encp)	((_encp)->enc_vf == 0xffff)