6.12-stable review patch. If anyone has any objections, please let me know.
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From: Meghana Malladi m-malladi@ti.com
[ Upstream commit 919d763d609428c2680ec8159257d9655f002f89 ]
In MII mode, Tx lines are swapped for port0 and port1, which means Tx port0 receives data from PRU1 and the Tx port1 receives data from PRU0. This is an expected hardware behavior and reading the Tx stats needs to be handled accordingly in the driver. Update the driver to read Tx stats from the PRU1 for port0 and PRU0 for port1.
Fixes: c1e10d5dc7a1 ("net: ti: icssg-prueth: Add ICSSG Stats") Signed-off-by: Meghana Malladi m-malladi@ti.com Reviewed-by: Simon Horman horms@kernel.org Link: https://patch.msgid.link/20250603052904.431203-1-m-malladi@ti.com Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/ti/icssg/icssg_stats.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/net/ethernet/ti/icssg/icssg_stats.c b/drivers/net/ethernet/ti/icssg/icssg_stats.c index 6f0edae38ea24..172ae38381b45 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_stats.c +++ b/drivers/net/ethernet/ti/icssg/icssg_stats.c @@ -29,6 +29,14 @@ void emac_update_hardware_stats(struct prueth_emac *emac) spin_lock(&prueth->stats_lock);
for (i = 0; i < ARRAY_SIZE(icssg_all_miig_stats); i++) { + /* In MII mode TX lines are swapped inside ICSSG, so read Tx stats + * from slice1 for port0 and slice0 for port1 to get accurate Tx + * stats for a given port + */ + if (emac->phy_if == PHY_INTERFACE_MODE_MII && + icssg_all_miig_stats[i].offset >= ICSSG_TX_PACKET_OFFSET && + icssg_all_miig_stats[i].offset <= ICSSG_TX_BYTE_OFFSET) + base = stats_base[slice ^ 1]; regmap_read(prueth->miig_rt, base + icssg_all_miig_stats[i].offset, &val);