octeontx2-af: Fix CGX Receive counters

[ Upstream commit bf449f35e77fd44017abf991fac1f9ab7705bbe0 ]

Each CGX block supports 4 logical MACs (LMACS). Receive
counters CGX_CMR_RX_STAT0-8 are per LMAC and CGX_CMR_RX_STAT9-12
are per CGX.

Due a bug in previous patch, stale Per CGX counters values observed.

Fixes: 66208910e57a ("octeontx2-af: Support to retrieve CGX LMAC stats")
Signed-off-by: Hariprasad Kelam <hkelam@marvell.com>
Link: https://patch.msgid.link/20250513071554.728922-1-hkelam@marvell.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
index 52792546fe00dd0a677e7a89e60a6dbdf24cb5e9..339be6950c0395a74ef1081eda21c6fec05286fc 100644 (file)
--- a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
@@ -707,6 +707,11 @@ int cgx_get_rx_stats(void *cgxd, int lmac_id, int idx, u64 *rx_stat)
 
        if (!is_lmac_valid(cgx, lmac_id))
                return -ENODEV;
+
+       /* pass lmac as 0 for CGX_CMR_RX_STAT9-12 */
+       if (idx >= CGX_RX_STAT_GLOBAL_INDEX)
+               lmac_id = 0;
+
        *rx_stat =  cgx_read(cgx, lmac_id, CGXX_CMRX_RX_STAT0 + (idx * 8));
        return 0;
 }