kernel: delete Linux 5.4 config and patches

As the upcoming release will be based on Linux 5.10 only, remove all
kernel configuration as well as patches for Linux 5.4.
There were no targets still actively using Linux 5.4.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit 3a14580411adfb75f9a44eded9f41245b9e44606)

1 files changed, 0 insertions, 347 deletions

diff --git a/target/linux/bcm63xx/patches-5.4/045-v5.12-bcm63xx_enet-convert-to-build_skb.patch b/target/linux/bcm63xx/patches-5.4/045-v5.12-bcm63xx_enet-convert-to-build_skb.patch
deleted file mode 100644
index 80d44ec981..0000000000
--- a/target/linux/bcm63xx/patches-5.4/045-v5.12-bcm63xx_enet-convert-to-build_skb.patch
+++ /dev/null
@@ -1,347 +0,0 @@
-From d27de0ef5ef995df2cc5f5c006c0efcf0a62b6af Mon Sep 17 00:00:00 2001
-From: Sieng Piaw Liew <liew.s.piaw@gmail.com>
-Date: Wed, 6 Jan 2021 22:42:07 +0800
-Subject: [PATCH 6/7] bcm63xx_enet: convert to build_skb
-
-We can increase the efficiency of rx path by using buffers to receive
-packets then build SKBs around them just before passing into the network
-stack. In contrast, preallocating SKBs too early reduces CPU cache
-efficiency.
-
-Check if we're in NAPI context when refilling RX. Normally we're almost
-always running in NAPI context. Dispatch to napi_alloc_frag directly
-instead of relying on netdev_alloc_frag which does the same but
-with the overhead of local_bh_disable/enable.
-
-Tested on BCM6328 320 MHz and iperf3 -M 512 to measure packet/sec
-performance. Included netif_receive_skb_list and NET_IP_ALIGN
-optimizations.
-
-Before:
-[ ID] Interval           Transfer     Bandwidth       Retr
-[  4]   0.00-10.00  sec  49.9 MBytes  41.9 Mbits/sec  197         sender
-[  4]   0.00-10.00  sec  49.3 MBytes  41.3 Mbits/sec            receiver
-
-After:
-[ ID] Interval           Transfer     Bandwidth       Retr
-[  4]   0.00-30.00  sec   171 MBytes  47.8 Mbits/sec  272         sender
-[  4]   0.00-30.00  sec   170 MBytes  47.6 Mbits/sec            receiver
-
-Signed-off-by: Sieng Piaw Liew <liew.s.piaw@gmail.com>
-Acked-by: Florian Fainelli <f.fainelli@gmail.com>
-Signed-off-by: Jakub Kicinski <kuba@kernel.org>
----
- drivers/net/ethernet/broadcom/bcm63xx_enet.c | 111 ++++++++++---------
- drivers/net/ethernet/broadcom/bcm63xx_enet.h |  14 ++-
- 2 files changed, 71 insertions(+), 54 deletions(-)
-
---- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
-+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
-@@ -221,7 +221,7 @@ static void bcm_enet_mdio_write_mii(stru
- /*
-  * refill rx queue
-  */
--static int bcm_enet_refill_rx(struct net_device *dev)
-+static int bcm_enet_refill_rx(struct net_device *dev, bool napi_mode)
- {
- 	struct bcm_enet_priv *priv;
- 
-@@ -229,29 +229,29 @@ static int bcm_enet_refill_rx(struct net
- 
- 	while (priv->rx_desc_count < priv->rx_ring_size) {
- 		struct bcm_enet_desc *desc;
--		struct sk_buff *skb;
--		dma_addr_t p;
- 		int desc_idx;
- 		u32 len_stat;
- 
- 		desc_idx = priv->rx_dirty_desc;
- 		desc = &priv->rx_desc_cpu[desc_idx];
- 
--		if (!priv->rx_skb[desc_idx]) {
--			if (priv->enet_is_sw)
--				skb = netdev_alloc_skb_ip_align(dev, priv->rx_skb_size);
-+		if (!priv->rx_buf[desc_idx]) {
-+			void *buf;
-+
-+			if (likely(napi_mode))
-+				buf = napi_alloc_frag(priv->rx_frag_size);
- 			else
--				skb = netdev_alloc_skb(dev, priv->rx_skb_size);
--			if (!skb)
-+				buf = netdev_alloc_frag(priv->rx_frag_size);
-+			if (unlikely(!buf))
- 				break;
--			priv->rx_skb[desc_idx] = skb;
--			p = dma_map_single(&priv->pdev->dev, skb->data,
--					   priv->rx_skb_size,
--					   DMA_FROM_DEVICE);
--			desc->address = p;
-+			priv->rx_buf[desc_idx] = buf;
-+			desc->address = dma_map_single(&priv->pdev->dev,
-+						       buf + priv->rx_buf_offset,
-+						       priv->rx_buf_size,
-+						       DMA_FROM_DEVICE);
- 		}
- 
--		len_stat = priv->rx_skb_size << DMADESC_LENGTH_SHIFT;
-+		len_stat = priv->rx_buf_size << DMADESC_LENGTH_SHIFT;
- 		len_stat |= DMADESC_OWNER_MASK;
- 		if (priv->rx_dirty_desc == priv->rx_ring_size - 1) {
- 			len_stat |= (DMADESC_WRAP_MASK >> priv->dma_desc_shift);
-@@ -291,7 +291,7 @@ static void bcm_enet_refill_rx_timer(str
- 	struct net_device *dev = priv->net_dev;
- 
- 	spin_lock(&priv->rx_lock);
--	bcm_enet_refill_rx(dev);
-+	bcm_enet_refill_rx(dev, false);
- 	spin_unlock(&priv->rx_lock);
- }
- 
-@@ -321,6 +321,7 @@ static int bcm_enet_receive_queue(struct
- 		int desc_idx;
- 		u32 len_stat;
- 		unsigned int len;
-+		void *buf;
- 
- 		desc_idx = priv->rx_curr_desc;
- 		desc = &priv->rx_desc_cpu[desc_idx];
-@@ -366,16 +367,14 @@ static int bcm_enet_receive_queue(struct
- 		}
- 
- 		/* valid packet */
--		skb = priv->rx_skb[desc_idx];
-+		buf = priv->rx_buf[desc_idx];
- 		len = (len_stat & DMADESC_LENGTH_MASK) >> DMADESC_LENGTH_SHIFT;
- 		/* don't include FCS */
- 		len -= 4;
- 
- 		if (len < copybreak) {
--			struct sk_buff *nskb;
--
--			nskb = napi_alloc_skb(&priv->napi, len);
--			if (!nskb) {
-+			skb = napi_alloc_skb(&priv->napi, len);
-+			if (unlikely(!skb)) {
- 				/* forget packet, just rearm desc */
- 				dev->stats.rx_dropped++;
- 				continue;
-@@ -383,14 +382,21 @@ static int bcm_enet_receive_queue(struct
- 
- 			dma_sync_single_for_cpu(kdev, desc->address,
- 						len, DMA_FROM_DEVICE);
--			memcpy(nskb->data, skb->data, len);
-+			memcpy(skb->data, buf + priv->rx_buf_offset, len);
- 			dma_sync_single_for_device(kdev, desc->address,
- 						   len, DMA_FROM_DEVICE);
--			skb = nskb;
- 		} else {
--			dma_unmap_single(&priv->pdev->dev, desc->address,
--					 priv->rx_skb_size, DMA_FROM_DEVICE);
--			priv->rx_skb[desc_idx] = NULL;
-+			dma_unmap_single(kdev, desc->address,
-+					 priv->rx_buf_size, DMA_FROM_DEVICE);
-+			priv->rx_buf[desc_idx] = NULL;
-+
-+			skb = build_skb(buf, priv->rx_frag_size);
-+			if (unlikely(!skb)) {
-+				skb_free_frag(buf);
-+				dev->stats.rx_dropped++;
-+				continue;
-+			}
-+			skb_reserve(skb, priv->rx_buf_offset);
- 		}
- 
- 		skb_put(skb, len);
-@@ -404,7 +410,7 @@ static int bcm_enet_receive_queue(struct
- 	netif_receive_skb_list(&rx_list);
- 
- 	if (processed || !priv->rx_desc_count) {
--		bcm_enet_refill_rx(dev);
-+		bcm_enet_refill_rx(dev, true);
- 
- 		/* kick rx dma */
- 		enet_dmac_writel(priv, priv->dma_chan_en_mask,
-@@ -861,22 +867,22 @@ static void bcm_enet_adjust_link(struct
- 		priv->pause_tx ? "tx" : "off");
- }
- 
--static void bcm_enet_free_rx_skb_ring(struct device *kdev, struct bcm_enet_priv *priv)
-+static void bcm_enet_free_rx_buf_ring(struct device *kdev, struct bcm_enet_priv *priv)
- {
- 	int i;
- 
- 	for (i = 0; i < priv->rx_ring_size; i++) {
- 		struct bcm_enet_desc *desc;
- 
--		if (!priv->rx_skb[i])
-+		if (!priv->rx_buf[i])
- 			continue;
- 
- 		desc = &priv->rx_desc_cpu[i];
--		dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
-+		dma_unmap_single(kdev, desc->address, priv->rx_buf_size,
- 				 DMA_FROM_DEVICE);
--		kfree_skb(priv->rx_skb[i]);
-+		skb_free_frag(priv->rx_buf[i]);
- 	}
--	kfree(priv->rx_skb);
-+	kfree(priv->rx_buf);
- }
- 
- /*
-@@ -988,10 +994,10 @@ static int bcm_enet_open(struct net_devi
- 	priv->tx_curr_desc = 0;
- 	spin_lock_init(&priv->tx_lock);
- 
--	/* init & fill rx ring with skbs */
--	priv->rx_skb = kcalloc(priv->rx_ring_size, sizeof(struct sk_buff *),
-+	/* init & fill rx ring with buffers */
-+	priv->rx_buf = kcalloc(priv->rx_ring_size, sizeof(void *),
- 			       GFP_KERNEL);
--	if (!priv->rx_skb) {
-+	if (!priv->rx_buf) {
- 		ret = -ENOMEM;
- 		goto out_free_tx_skb;
- 	}
-@@ -1008,8 +1014,8 @@ static int bcm_enet_open(struct net_devi
- 		enet_dmac_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
- 				ENETDMAC_BUFALLOC, priv->rx_chan);
- 
--	if (bcm_enet_refill_rx(dev)) {
--		dev_err(kdev, "cannot allocate rx skb queue\n");
-+	if (bcm_enet_refill_rx(dev, false)) {
-+		dev_err(kdev, "cannot allocate rx buffer queue\n");
- 		ret = -ENOMEM;
- 		goto out;
- 	}
-@@ -1103,7 +1109,7 @@ static int bcm_enet_open(struct net_devi
- 	return 0;
- 
- out:
--	bcm_enet_free_rx_skb_ring(kdev, priv);
-+	bcm_enet_free_rx_buf_ring(kdev, priv);
- 
- out_free_tx_skb:
- 	kfree(priv->tx_skb);
-@@ -1209,8 +1215,8 @@ static int bcm_enet_stop(struct net_devi
- 	/* force reclaim of all tx buffers */
- 	bcm_enet_tx_reclaim(dev, 1);
- 
--	/* free the rx skb ring */
--	bcm_enet_free_rx_skb_ring(kdev, priv);
-+	/* free the rx buffer ring */
-+	bcm_enet_free_rx_buf_ring(kdev, priv);
- 
- 	/* free remaining allocated memory */
- 	kfree(priv->tx_skb);
-@@ -1637,9 +1643,12 @@ static int bcm_enet_change_mtu(struct ne
- 	 * align rx buffer size to dma burst len, account FCS since
- 	 * it's appended
- 	 */
--	priv->rx_skb_size = ALIGN(actual_mtu + ETH_FCS_LEN,
-+	priv->rx_buf_size = ALIGN(actual_mtu + ETH_FCS_LEN,
- 				  priv->dma_maxburst * 4);
- 
-+	priv->rx_frag_size = SKB_DATA_ALIGN(priv->rx_buf_offset + priv->rx_buf_size) +
-+					    SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
-+
- 	dev->mtu = new_mtu;
- 	return 0;
- }
-@@ -1725,6 +1734,7 @@ static int bcm_enet_probe(struct platfor
- 
- 	priv->enet_is_sw = false;
- 	priv->dma_maxburst = BCMENET_DMA_MAXBURST;
-+	priv->rx_buf_offset = NET_SKB_PAD;
- 
- 	ret = bcm_enet_change_mtu(dev, dev->mtu);
- 	if (ret)
-@@ -2142,7 +2152,7 @@ static int bcm_enetsw_open(struct net_de
- 	priv->tx_skb = kcalloc(priv->tx_ring_size, sizeof(struct sk_buff *),
- 			       GFP_KERNEL);
- 	if (!priv->tx_skb) {
--		dev_err(kdev, "cannot allocate rx skb queue\n");
-+		dev_err(kdev, "cannot allocate tx skb queue\n");
- 		ret = -ENOMEM;
- 		goto out_free_tx_ring;
- 	}
-@@ -2152,11 +2162,11 @@ static int bcm_enetsw_open(struct net_de
- 	priv->tx_curr_desc = 0;
- 	spin_lock_init(&priv->tx_lock);
- 
--	/* init & fill rx ring with skbs */
--	priv->rx_skb = kcalloc(priv->rx_ring_size, sizeof(struct sk_buff *),
-+	/* init & fill rx ring with buffers */
-+	priv->rx_buf = kcalloc(priv->rx_ring_size, sizeof(void *),
- 			       GFP_KERNEL);
--	if (!priv->rx_skb) {
--		dev_err(kdev, "cannot allocate rx skb queue\n");
-+	if (!priv->rx_buf) {
-+		dev_err(kdev, "cannot allocate rx buffer queue\n");
- 		ret = -ENOMEM;
- 		goto out_free_tx_skb;
- 	}
-@@ -2203,8 +2213,8 @@ static int bcm_enetsw_open(struct net_de
- 	enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
- 			ENETDMA_BUFALLOC_REG(priv->rx_chan));
- 
--	if (bcm_enet_refill_rx(dev)) {
--		dev_err(kdev, "cannot allocate rx skb queue\n");
-+	if (bcm_enet_refill_rx(dev, false)) {
-+		dev_err(kdev, "cannot allocate rx buffer queue\n");
- 		ret = -ENOMEM;
- 		goto out;
- 	}
-@@ -2303,7 +2313,7 @@ static int bcm_enetsw_open(struct net_de
- 	return 0;
- 
- out:
--	bcm_enet_free_rx_skb_ring(kdev, priv);
-+	bcm_enet_free_rx_buf_ring(kdev, priv);
- 
- out_free_tx_skb:
- 	kfree(priv->tx_skb);
-@@ -2353,8 +2363,8 @@ static int bcm_enetsw_stop(struct net_de
- 	/* force reclaim of all tx buffers */
- 	bcm_enet_tx_reclaim(dev, 1);
- 
--	/* free the rx skb ring */
--	bcm_enet_free_rx_skb_ring(kdev, priv);
-+	/* free the rx buffer ring */
-+	bcm_enet_free_rx_buf_ring(kdev, priv);
- 
- 	/* free remaining allocated memory */
- 	kfree(priv->tx_skb);
-@@ -2655,6 +2665,7 @@ static int bcm_enetsw_probe(struct platf
- 	priv->rx_ring_size = BCMENET_DEF_RX_DESC;
- 	priv->tx_ring_size = BCMENET_DEF_TX_DESC;
- 	priv->dma_maxburst = BCMENETSW_DMA_MAXBURST;
-+	priv->rx_buf_offset = NET_SKB_PAD + NET_IP_ALIGN;
- 
- 	pd = dev_get_platdata(&pdev->dev);
- 	if (pd) {
---- a/drivers/net/ethernet/broadcom/bcm63xx_enet.h
-+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.h
-@@ -230,11 +230,17 @@ struct bcm_enet_priv {
- 	/* next dirty rx descriptor to refill */
- 	int rx_dirty_desc;
- 
--	/* size of allocated rx skbs */
--	unsigned int rx_skb_size;
-+	/* size of allocated rx buffers */
-+	unsigned int rx_buf_size;
- 
--	/* list of skb given to hw for rx */
--	struct sk_buff **rx_skb;
-+	/* allocated rx buffer offset */
-+	unsigned int rx_buf_offset;
-+
-+	/* size of allocated rx frag */
-+	unsigned int rx_frag_size;
-+
-+	/* list of buffer given to hw for rx */
-+	void **rx_buf;
- 
- 	/* used when rx skb allocation failed, so we defer rx queue
- 	 * refill */