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net: ethernet: ti: am65-cpsw: Fix hardware switch mode on suspend/resume 

On low power during system suspend the ALE table context is lost.
Save the ALE context before suspend and restore it after resume.

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Roger Quadros 2022-12-06 11:44:19 +02:00 committed by Jakub Kicinski
parent 1581cd8b11
commit 020b232f79
2 changed files with 9 additions and 0 deletions
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7
drivers/net/ethernet/ti/am65-cpsw-nuss.c
View File

@ -2712,6 +2712,7 @@ static int am65_cpsw_nuss_probe(struct platform_device *pdev)
struct clk *clk;
u64 id_temp;
int ret, i;
int ale_entries;
common = devm_kzalloc(dev, sizeof(struct am65_cpsw_common), GFP_KERNEL);
if (!common)
@ -2807,6 +2808,10 @@ static int am65_cpsw_nuss_probe(struct platform_device *pdev)
goto err_of_clear;
}
ale_entries = common->ale->params.ale_entries;
common->ale_context = devm_kzalloc(dev,
ale_entries * ALE_ENTRY_WORDS * sizeof(u32),
GFP_KERNEL);
ret = am65_cpsw_init_cpts(common);
if (ret)
goto err_of_clear;
@ -2877,6 +2882,7 @@ static int am65_cpsw_nuss_suspend(struct device *dev)
struct net_device *ndev;
int i, ret;
cpsw_ale_dump(common->ale, common->ale_context);
host_p->vid_context = readl(host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
for (i = 0; i < common->port_num; i++) {
port = &common->ports[i];
@ -2949,6 +2955,7 @@ static int am65_cpsw_nuss_resume(struct device *dev)
}
writel(host_p->vid_context, host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
cpsw_ale_restore(common->ale, common->ale_context);
return 0;
}

2
drivers/net/ethernet/ti/am65-cpsw-nuss.h
View File

@ -149,6 +149,8 @@ struct am65_cpsw_common {
struct net_device *hw_bridge_dev;
struct notifier_block am65_cpsw_netdevice_nb;
unsigned char switch_id[MAX_PHYS_ITEM_ID_LEN];
/* only for suspend/resume context restore */
u32 *ale_context;
};
struct am65_cpsw_ndev_stats {