Subject: [PATCH] net: ethernet: mtk_eth_soc: allocate struct mtk_ppe separately
From: Felix Fietkau <[email-masked]>
Date: Mon, 21 Feb 2022 15:38:20 +0100

Preparation for adding more data to it, which will increase its size.

Signed-off-by: Felix Fietkau <[email-masked]>
---

--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -2332,7 +2332,7 @@ static int mtk_open(struct net_device *d
 			return err;
 		}
 
-		if (eth->soc->offload_version && mtk_ppe_start(&eth->ppe) == 0)
+		if (eth->soc->offload_version && mtk_ppe_start(eth->ppe) == 0)
 			gdm_config = MTK_GDMA_TO_PPE;
 
 		mtk_gdm_config(eth, gdm_config);
@@ -2406,7 +2406,7 @@ static int mtk_stop(struct net_device *d
 	mtk_dma_free(eth);
 
 	if (eth->soc->offload_version)
-		mtk_ppe_stop(&eth->ppe);
+		mtk_ppe_stop(eth->ppe);
 
 	return 0;
 }
@@ -3292,10 +3292,11 @@ static int mtk_probe(struct platform_dev
 	}
 
 	if (eth->soc->offload_version) {
-		err = mtk_ppe_init(&eth->ppe, eth->dev,
-				   eth->base + MTK_ETH_PPE_BASE, 2);
-		if (err)
+		eth->ppe = mtk_ppe_init(eth->dev, eth->base + MTK_ETH_PPE_BASE, 2);
+		if (!eth->ppe) {
+			err = -ENOMEM;
 			goto err_free_dev;
+		}
 
 		err = mtk_eth_offload_init(eth);
 		if (err)
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -977,7 +977,7 @@ struct mtk_eth {
 	u32				rx_dma_l4_valid;
 	int				ip_align;
 
-	struct mtk_ppe			ppe;
+	struct mtk_ppe			*ppe;
 	struct rhashtable		flow_table;
 };
 
--- a/drivers/net/ethernet/mediatek/mtk_ppe.c
+++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
@@ -384,10 +384,15 @@ int mtk_foe_entry_commit(struct mtk_ppe
 	return hash;
 }
 
-int mtk_ppe_init(struct mtk_ppe *ppe, struct device *dev, void __iomem *base,
+struct mtk_ppe *mtk_ppe_init(struct device *dev, void __iomem *base,
 		 int version)
 {
 	struct mtk_foe_entry *foe;
+	struct mtk_ppe *ppe;
+
+	ppe = devm_kzalloc(dev, sizeof(*ppe), GFP_KERNEL);
+	if (!ppe)
+		return NULL;
 
 	/* need to allocate a separate device, since it PPE DMA access is
 	 * not coherent.
@@ -399,13 +404,13 @@ int mtk_ppe_init(struct mtk_ppe *ppe, st
 	foe = dmam_alloc_coherent(ppe->dev, MTK_PPE_ENTRIES * sizeof(*foe),
 				  &ppe->foe_phys, GFP_KERNEL);
 	if (!foe)
-		return -ENOMEM;
+		return NULL;
 
 	ppe->foe_table = foe;
 
 	mtk_ppe_debugfs_init(ppe);
 
-	return 0;
+	return ppe;
 }
 
 static void mtk_ppe_init_foe_table(struct mtk_ppe *ppe)
--- a/drivers/net/ethernet/mediatek/mtk_ppe.h
+++ b/drivers/net/ethernet/mediatek/mtk_ppe.h
@@ -246,8 +246,7 @@ struct mtk_ppe {
 	void *acct_table;
 };
 
-int mtk_ppe_init(struct mtk_ppe *ppe, struct device *dev, void __iomem *base,
-		 int version);
+struct mtk_ppe *mtk_ppe_init(struct device *dev, void __iomem *base, int version);
 int mtk_ppe_start(struct mtk_ppe *ppe);
 int mtk_ppe_stop(struct mtk_ppe *ppe);
 
--- a/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
+++ b/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
@@ -412,7 +412,7 @@ mtk_flow_offload_replace(struct mtk_eth
 
 	entry->cookie = f->cookie;
 	timestamp = mtk_eth_timestamp(eth);
-	hash = mtk_foe_entry_commit(&eth->ppe, &foe, timestamp);
+	hash = mtk_foe_entry_commit(eth->ppe, &foe, timestamp);
 	if (hash < 0) {
 		err = hash;
 		goto free;
@@ -427,7 +427,7 @@ mtk_flow_offload_replace(struct mtk_eth
 
 	return 0;
 clear_flow:
-	mtk_foe_entry_clear(&eth->ppe, hash);
+	mtk_foe_entry_clear(eth->ppe, hash);
 free:
 	kfree(entry);
 	if (wed_index >= 0)
@@ -445,7 +445,7 @@ mtk_flow_offload_destroy(struct mtk_eth
 	if (!entry)
 		return -ENOENT;
 
-	mtk_foe_entry_clear(&eth->ppe, entry->hash);
+	mtk_foe_entry_clear(eth->ppe, entry->hash);
 	rhashtable_remove_fast(&eth->flow_table, &entry->node,
 			       mtk_flow_ht_params);
 	if (entry->wed_index >= 0)
@@ -467,7 +467,7 @@ mtk_flow_offload_stats(struct mtk_eth *e
 	if (!entry)
 		return -ENOENT;
 
-	timestamp = mtk_foe_entry_timestamp(&eth->ppe, entry->hash);
+	timestamp = mtk_foe_entry_timestamp(eth->ppe, entry->hash);
 	if (timestamp < 0)
 		return -ETIMEDOUT;
 
@@ -523,7 +523,7 @@ mtk_eth_setup_tc_block(struct net_device
 	struct flow_block_cb *block_cb;
 	flow_setup_cb_t *cb;
 
-	if (!eth->ppe.foe_table)
+	if (!eth->ppe || !eth->ppe->foe_table)
 		return -EOPNOTSUPP;
 
 	if (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
@@ -575,7 +575,7 @@ int mtk_eth_setup_tc(struct net_device *
 
 int mtk_eth_offload_init(struct mtk_eth *eth)
 {
-	if (!eth->ppe.foe_table)
+	if (!eth->ppe || !eth->ppe->foe_table)
 		return 0;
 
 	return rhashtable_init(&eth->flow_table, &mtk_flow_ht_params);