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, 205 deletions

diff --git a/target/linux/layerscape/patches-5.4/701-net-0022-sdk_dpaa-ls1043a-errata-realign-and-linearize-egress.patch b/target/linux/layerscape/patches-5.4/701-net-0022-sdk_dpaa-ls1043a-errata-realign-and-linearize-egress.patch
deleted file mode 100644
index 3e89b3d7b6..0000000000
--- a/target/linux/layerscape/patches-5.4/701-net-0022-sdk_dpaa-ls1043a-errata-realign-and-linearize-egress.patch
+++ /dev/null
@@ -1,205 +0,0 @@
-From 9821d27a36704d19c57d4b6c52585b9868703633 Mon Sep 17 00:00:00 2001
-From: Camelia Groza <camelia.groza@nxp.com>
-Date: Mon, 4 Sep 2017 13:41:17 +0300
-Subject: [PATCH] sdk_dpaa: ls1043a errata: realign and linearize egress skbs
-
-Allocate a new page and copy the skb's contents to it in order to
-guarantee that 4k boundary crossings do not occur.
-
-Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
----
- .../net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c  | 159 +++++++++++----------
- 1 file changed, 84 insertions(+), 75 deletions(-)
-
---- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c
-+++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c
-@@ -742,86 +742,94 @@ int __hot skb_to_contig_fd(struct dpa_pr
- EXPORT_SYMBOL(skb_to_contig_fd);
- 
- #ifndef CONFIG_PPC
--struct sk_buff *split_skb_at_4k_boundaries(struct sk_buff *skb)
-+/* Verify the conditions that trigger the A010022 errata: 4K memory address
-+ * crossings.
-+ */
-+bool a010022_check_skb(struct sk_buff *skb)
- {
--	unsigned int length, nr_frags, moved_len = 0;
--	u64 page_start;
--	struct page *page;
-+	int nr_frags, i = 0;
- 	skb_frag_t *frag;
--	int i = 0, j = 0;
- 
--	/* make sure skb is not shared */
--	skb = skb_share_check(skb, GFP_ATOMIC);
--	if (!skb)
--		return NULL;
-+	/* Check if the headroom crosses a boundary */
-+	if (HAS_DMA_ISSUE(skb->head, skb_headroom(skb)))
-+		return true;
-+
-+	/* Check if the non-paged data crosses a boundary */
-+	if (HAS_DMA_ISSUE(skb->data, skb_headlen(skb)))
-+		return true;
-+
-+	/* Check if the entire linear skb crosses a boundary */
-+	if (HAS_DMA_ISSUE(skb->head, skb_end_offset(skb)))
-+		return true;
- 
- 	nr_frags = skb_shinfo(skb)->nr_frags;
--	page_start = (u64)skb->data;
- 
--	/* split the linear part at the first 4k boundary and create one (big)
--	 * fragment with the rest
--	 */
--	if (HAS_DMA_ISSUE(skb->data, skb_headlen(skb))) {
--		/* we'll add one more frag, make sure there's room */
--		if (nr_frags + 1 > DPA_SGT_MAX_ENTRIES)
--			return NULL;
--
--		/* next page boundary */
--		page_start = (page_start + 0x1000) & ~0xFFF;
--		page = virt_to_page(page_start);
--
--		/* move the rest of fragments to make room for a new one at j */
--		for (i = nr_frags - 1; i >= j;  i--)
--			skb_shinfo(skb)->frags[i + 1] = skb_shinfo(skb)->frags[i];
--
--		/* move length bytes to a paged fragment at j */
--		length = min((u64)0x1000,
--			     (u64)skb->data + skb_headlen(skb) - page_start);
--		skb->data_len += length;
--		moved_len += length;
--		skb_fill_page_desc(skb, j++, page, 0, length);
--		get_page(page);
--		skb_shinfo(skb)->nr_frags = ++nr_frags;
-+	while (i < nr_frags) {
-+		frag = &skb_shinfo(skb)->frags[i];
-+
-+		/* Check if the paged fragment crosses a boundary from its
-+		 * offset to its end.
-+		 */
-+		if (HAS_DMA_ISSUE(frag->page_offset, frag->size))
-+			return true;
-+
-+		i++;
- 	}
--	/* adjust the tail pointer */
--	skb->tail -= moved_len;
--	j = 0;
--
--	/* split any paged fragment that crosses a 4K boundary */
--	while (j < nr_frags) {
--		frag = &skb_shinfo(skb)->frags[j];
--
--		/* if there is a 4K boundary between the fragment's offset and end */
--		if (HAS_DMA_ISSUE(frag->page_offset, frag->size)) {
--			/* we'll add one more frag, make sure there's room */
--			if (nr_frags + 1 > DPA_SGT_MAX_ENTRIES)
--				return NULL;
--
--			/* new page boundary */
--			page_start = (u64)page_address(skb_frag_page(frag)) +
--						  frag->page_offset + 0x1000;
--			page_start = (u64)page_start & ~0xFFF;
--			page = virt_to_page(page_start);
--
--			/* move the rest of fragments to make room for a new one at j+1 */
--			for (i = nr_frags - 1; i > j;  i--)
--				skb_shinfo(skb)->frags[i + 1] =
--						skb_shinfo(skb)->frags[i];
--
--			/* move length bytes to a new paged fragment at j+1 */
--			length = (u64)page_address(skb_frag_page(frag)) +
--				 frag->page_offset + frag->size - page_start;
--			frag->size -= length;
--			skb_fill_page_desc(skb, j + 1, page, 0, length);
--			get_page(page);
--			skb_shinfo(skb)->nr_frags = ++nr_frags;
--		}
- 
--		/* move to next frag */
--		j++;
-+	return false;
-+}
-+
-+/* Realign the skb by copying its contents at the start of a newly allocated
-+ * page. Build a new skb around the new buffer and release the old one.
-+ * A performance drop should be expected.
-+ */
-+struct sk_buff *a010022_realign_skb(struct sk_buff *skb)
-+{
-+	int headroom = skb_headroom(skb);
-+	struct sk_buff *nskb = NULL;
-+	struct page *npage;
-+	void *npage_addr;
-+	int nsize;
-+
-+	npage = alloc_page(GFP_ATOMIC);
-+	if (unlikely(!npage)) {
-+		WARN_ONCE(1, "Memory allocation failure\n");
-+		return NULL;
-+	}
-+	npage_addr = page_address(npage);
-+
-+	/* For the new skb we only need the old one's data (both non-paged and
-+	 * paged) and a headroom large enough to fit our private info. We can
-+	 * skip the old tailroom.
-+	 *
-+	 * Make sure the new linearized buffer will not exceed a page's size.
-+	 */
-+	nsize = headroom + skb->len +
-+		SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
-+	if (unlikely(nsize > 4096))
-+		goto err;
-+
-+	nskb = build_skb(npage_addr, nsize);
-+	if (unlikely(!nskb))
-+		goto err;
-+
-+	/* Code borrowed and adapted from skb_copy() */
-+	skb_reserve(nskb, headroom);
-+	skb_put(nskb, skb->len);
-+	if (skb_copy_bits(skb, 0, nskb->data, skb->len)) {
-+		WARN_ONCE(1, "skb parsing failure\n");
-+		goto err;
- 	}
-+	copy_skb_header(nskb, skb);
-+
-+	dev_kfree_skb(skb);
-+	return nskb;
- 
--	return skb;
-+err:
-+	if (nskb)
-+		dev_kfree_skb(nskb);
-+	put_page(npage);
-+	return NULL;
- }
- #endif
- 
-@@ -1016,9 +1024,9 @@ int __hot dpa_tx_extended(struct sk_buff
- #endif /* CONFIG_FSL_DPAA_TS */
- 
- #ifndef CONFIG_PPC
--resplit_4k:
--	if (unlikely(dpaa_errata_a010022)) {
--		skb = split_skb_at_4k_boundaries(skb);
-+realign_4k:
-+	if (unlikely(dpaa_errata_a010022) && a010022_check_skb(skb)) {
-+		skb = a010022_realign_skb(skb);
- 		if (!skb)
- 			goto skb_to_fd_failed;
- 	}
-@@ -1064,8 +1072,9 @@ resplit_4k:
- 			kfree_skb(skb);
- 			skb = nskb;
- #ifndef CONFIG_PPC
--			if (unlikely(dpaa_errata_a010022))
--				goto resplit_4k;
-+			if (unlikely(dpaa_errata_a010022) &&
-+			    a010022_check_skb(skb))
-+				goto realign_4k;
- #endif
- 			/* skb_copy() has now linearized the skbuff. */
- 		} else if (unlikely(nonlinear)) {