[openwrt/staging/xback.git] /

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

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

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -2312,7 +2312,7 @@ static int mtk_open(struct net_device *d
                if (err)
                        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);
@@ -2386,7 +2386,7 @@ 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;
 }
@@ -3278,10 +3278,11 @@ 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
@@ -982,7 +982,7 @@ 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
@@ -411,7 +411,7 @@ 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;
@@ -426,7 +426,7 @@ 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)
@@ -444,7 +444,7 @@ 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)
@@ -466,7 +466,7 @@ 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;
 
@@ -522,7 +522,7 @@ 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)
@@ -574,7 +574,7 @@ 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);