mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 14:13:16 +00:00
cddd459140
Add patches for linux-5.4. The patches are from NXP LSDK-20.04 release which was tagged LSDK-20.04-V5.4. https://source.codeaurora.org/external/qoriq/qoriq-components/linux/ For boards LS1021A-IOT, and Traverse-LS1043 which are not involved in LSDK, port the dts patches from 4.14. The patches are sorted into the following categories: 301-arch-xxxx 302-dts-xxxx 303-core-xxxx 701-net-xxxx 801-audio-xxxx 802-can-xxxx 803-clock-xxxx 804-crypto-xxxx 805-display-xxxx 806-dma-xxxx 807-gpio-xxxx 808-i2c-xxxx 809-jailhouse-xxxx 810-keys-xxxx 811-kvm-xxxx 812-pcie-xxxx 813-pm-xxxx 814-qe-xxxx 815-sata-xxxx 816-sdhc-xxxx 817-spi-xxxx 818-thermal-xxxx 819-uart-xxxx 820-usb-xxxx 821-vfio-xxxx Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
85 lines
3.2 KiB
Diff
85 lines
3.2 KiB
Diff
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)
|