Commit 020b232f authored by Roger Quadros's avatar Roger Quadros Committed by Jakub Kicinski
Browse files

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: default avatarRoger Quadros <rogerq@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 1581cd8b

drivers/net/ethernet/ti/am65-cpsw-nuss.c

+7 −0
Original line number Diff line number Diff line
@@ -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;

}

drivers/net/ethernet/ti/am65-cpsw-nuss.h

+2 −0
Original line number Diff line number Diff line
@@ -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 {