kernel: delete Linux 5.4 config and patches

[openwrt/staging/chunkeey.git] / target / linux / layerscape / patches-5.4 / 701-net-0080-sdk_dpaa-store-the-skb-backpointer-in-the-skb-headro.patch

diff --git a/target/linux/layerscape/patches-5.4/701-net-0080-sdk_dpaa-store-the-skb-backpointer-in-the-skb-headro.patch b/target/linux/layerscape/patches-5.4/701-net-0080-sdk_dpaa-store-the-skb-backpointer-in-the-skb-headro.patch
deleted file mode 100644 (file)
index 12e5d15..0000000
--- a/target/linux/layerscape/patches-5.4/701-net-0080-sdk_dpaa-store-the-skb-backpointer-in-the-skb-headro.patch
+++ /dev/null
@@ -1,84 +0,0 @@
-From 1f00fa355829b510beb900ce1136f40802e6076e Mon Sep 17 00:00:00 2001
-From: Camelia Groza <camelia.groza@nxp.com>
-Date: Mon, 10 Sep 2018 14:31:05 +0300
-Subject: [PATCH] sdk_dpaa: store the skb backpointer in the skb headroom
-
-The skb backpointer is stored right before the FMan buffer, in order to
-avoid overwriting. The memory area storing the backpointer was outside of
-the skb. This made it hard to guarantee its size.
-
-This patch changes the layout of the skb at buffer seed time: the area
-reserved for storing the skb backpointer is part of the skb's headroom.
-This makes it easier to track if the backpointer can be safely stored
-when recycling the buffer.
-
-Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
----
- .../net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c  | 33 ++++++++++++++++------
- 1 file changed, 24 insertions(+), 9 deletions(-)
-
---- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c
-+++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c
-@@ -82,8 +82,8 @@ static void dpa_bp_recycle_frag(struct d
- 
- static int _dpa_bp_add_8_bufs(const struct dpa_bp *dpa_bp)
- {
-+      void *new_buf, *fman_buf;
-       struct bm_buffer bmb[8];
--      void *new_buf;
-       dma_addr_t addr;
-       uint8_t i;
-       struct device *dev = dpa_bp->dev;
-@@ -113,21 +113,37 @@ static int _dpa_bp_add_8_bufs(const stru
- 
-               if (unlikely(!new_buf))
-                       goto netdev_alloc_failed;
--              new_buf = PTR_ALIGN(new_buf + SMP_CACHE_BYTES, SMP_CACHE_BYTES);
-+              new_buf = PTR_ALIGN(new_buf, SMP_CACHE_BYTES);
- 
--              skb = build_skb(new_buf, DPA_SKB_SIZE(dpa_bp->size) +
--                      SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
-+              /* Apart from the buffer that will be used by the FMan, the
-+               * skb also guarantees enough space to hold the backpointer
-+               * in the headroom and the shared info at the end.
-+               */
-+              skb = build_skb(new_buf,
-+                              SMP_CACHE_BYTES + DPA_SKB_SIZE(dpa_bp->size) +
-+                              SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
-               if (unlikely(!skb)) {
-                       put_page(virt_to_head_page(new_buf));
-                       goto build_skb_failed;
-               }
- 
--              /* Store the skb back-pointer before the start of the buffer.
--               * Otherwise it will be overwritten by the FMan.
-+              /* Reserve SMP_CACHE_BYTES in the skb's headroom to store the
-+               * backpointer. This area will not be synced to, or
-+               * overwritten by, the FMan.
-+               */
-+              skb_reserve(skb, SMP_CACHE_BYTES);
-+
-+              /* We don't sync the first SMP_CACHE_BYTES of the buffer to
-+               * the FMan. The skb backpointer is stored at the end of the
-+               * reserved headroom. Otherwise it will be overwritten by the
-+               * FMan.
-+               * The buffer synced with the FMan starts right after the
-+               * reserved headroom.
-                */
--              DPA_WRITE_SKB_PTR(skb, skbh, new_buf, -1);
-+              fman_buf = new_buf + SMP_CACHE_BYTES;
-+              DPA_WRITE_SKB_PTR(skb, skbh, fman_buf, -1);
- 
--              addr = dma_map_single(dev, new_buf,
-+              addr = dma_map_single(dev, fman_buf,
-                               dpa_bp->size, DMA_BIDIRECTIONAL);
-               if (unlikely(dma_mapping_error(dev, addr)))
-                       goto dma_map_failed;
-@@ -477,7 +493,6 @@ static struct sk_buff *__hot sg_fd_to_sk
-                                DMA_BIDIRECTIONAL);
-               if (i == 0) {
-                       DPA_READ_SKB_PTR(skb, skbh, sg_vaddr, -1);
--                      DPA_BUG_ON(skb->head != sg_vaddr);
- #ifdef CONFIG_FSL_DPAA_1588
-                       if (priv->tsu && priv->tsu->valid &&
-                           priv->tsu->hwts_rx_en_ioctl)