net: bcmgenet: correct the RBUF_OVFL_CNT and RBUF_ERR_CNT MIB values
The location of the RBUF overflow and error counters has moved between
different version of the GENET MAC. This commit corrects the driver to
read from the correct locations depending on the version of the GENET
MAC.
Fixes: 1c1008c793fa ("net: bcmgenet: add main driver file")
Signed-off-by: Doug Berger <opendmb@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index f928968..f0fb7ec 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -1,7 +1,7 @@
/*
* Broadcom GENET (Gigabit Ethernet) controller driver
*
- * Copyright (c) 2014 Broadcom Corporation
+ * Copyright (c) 2014-2017 Broadcom
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -778,8 +778,9 @@ static const struct bcmgenet_stats bcmgenet_gstrings_stats[] = {
STAT_GENET_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
/* Misc UniMAC counters */
STAT_GENET_MISC("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt,
- UMAC_RBUF_OVFL_CNT),
- STAT_GENET_MISC("rbuf_err_cnt", mib.rbuf_err_cnt, UMAC_RBUF_ERR_CNT),
+ UMAC_RBUF_OVFL_CNT_V1),
+ STAT_GENET_MISC("rbuf_err_cnt", mib.rbuf_err_cnt,
+ UMAC_RBUF_ERR_CNT_V1),
STAT_GENET_MISC("mdf_err_cnt", mib.mdf_err_cnt, UMAC_MDF_ERR_CNT),
STAT_GENET_SOFT_MIB("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
STAT_GENET_SOFT_MIB("rx_dma_failed", mib.rx_dma_failed),
@@ -821,6 +822,45 @@ static void bcmgenet_get_strings(struct net_device *dev, u32 stringset,
}
}
+static u32 bcmgenet_update_stat_misc(struct bcmgenet_priv *priv, u16 offset)
+{
+ u16 new_offset;
+ u32 val;
+
+ switch (offset) {
+ case UMAC_RBUF_OVFL_CNT_V1:
+ if (GENET_IS_V2(priv))
+ new_offset = RBUF_OVFL_CNT_V2;
+ else
+ new_offset = RBUF_OVFL_CNT_V3PLUS;
+
+ val = bcmgenet_rbuf_readl(priv, new_offset);
+ /* clear if overflowed */
+ if (val == ~0)
+ bcmgenet_rbuf_writel(priv, 0, new_offset);
+ break;
+ case UMAC_RBUF_ERR_CNT_V1:
+ if (GENET_IS_V2(priv))
+ new_offset = RBUF_ERR_CNT_V2;
+ else
+ new_offset = RBUF_ERR_CNT_V3PLUS;
+
+ val = bcmgenet_rbuf_readl(priv, new_offset);
+ /* clear if overflowed */
+ if (val == ~0)
+ bcmgenet_rbuf_writel(priv, 0, new_offset);
+ break;
+ default:
+ val = bcmgenet_umac_readl(priv, offset);
+ /* clear if overflowed */
+ if (val == ~0)
+ bcmgenet_umac_writel(priv, 0, offset);
+ break;
+ }
+
+ return val;
+}
+
static void bcmgenet_update_mib_counters(struct bcmgenet_priv *priv)
{
int i, j = 0;
@@ -845,10 +885,16 @@ static void bcmgenet_update_mib_counters(struct bcmgenet_priv *priv)
UMAC_MIB_START + j + offset);
break;
case BCMGENET_STAT_MISC:
- val = bcmgenet_umac_readl(priv, s->reg_offset);
- /* clear if overflowed */
- if (val == ~0)
- bcmgenet_umac_writel(priv, 0, s->reg_offset);
+ if (GENET_IS_V1(priv)) {
+ val = bcmgenet_umac_readl(priv, s->reg_offset);
+ /* clear if overflowed */
+ if (val == ~0)
+ bcmgenet_umac_writel(priv, 0,
+ s->reg_offset);
+ } else {
+ val = bcmgenet_update_stat_misc(priv,
+ s->reg_offset);
+ }
break;
}