diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0108-sdk_dpaa-ls1043a-errata-impose-S-G-frame-realignment.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0108-sdk_dpaa-ls1043a-errata-impose-S-G-frame-realignment.patch | 81 |
1 files changed, 0 insertions, 81 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0108-sdk_dpaa-ls1043a-errata-impose-S-G-frame-realignment.patch b/target/linux/layerscape/patches-5.4/701-net-0108-sdk_dpaa-ls1043a-errata-impose-S-G-frame-realignment.patch deleted file mode 100644 index 8de280212f..0000000000 --- a/target/linux/layerscape/patches-5.4/701-net-0108-sdk_dpaa-ls1043a-errata-impose-S-G-frame-realignment.patch +++ /dev/null @@ -1,81 +0,0 @@ -From bfc02cc199dc6259c2f4e2af8f77c88fe8ba4cc5 Mon Sep 17 00:00:00 2001 -From: Camelia Groza <camelia.groza@nxp.com> -Date: Tue, 5 Mar 2019 11:55:54 +0200 -Subject: [PATCH] sdk_dpaa: ls1043a errata: impose S/G frame realignment - -Scatter/Gather frames are not support on LS1043A beacuse they trigger -the A010022 errata. - -Even though we do not advertise S/G support to the stack, we need to -make sure that if S/G frames do reach the driver somehow, they trigger -the errata workaround. - -Signed-off-by: Camelia Groza <camelia.groza@nxp.com> ---- - drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.h | 7 ++++--- - .../net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c | 23 +++++----------------- - 2 files changed, 9 insertions(+), 21 deletions(-) - ---- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.h -+++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.h -@@ -653,9 +653,10 @@ static inline void _dpa_bp_free_pf(void - - /* LS1043A SoC has a HW issue regarding FMan DMA transactions; The issue - * manifests itself at high traffic rates when frames cross 4K memory -- * boundaries or when they are not aligned to 16 bytes; For the moment, we -- * use a SW workaround that realigns frames to 256 bytes. Scatter/Gather -- * frames aren't supported on egress. -+ * boundaries, when they are not aligned to 16 bytes or when they have -+ * Scatter/Gather fragments; For the moment, we use a SW workaround that -+ * realigns frames to 256 bytes. Scatter/Gather frames aren't supported -+ * on egress. - */ - - #ifndef CONFIG_PPC ---- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c -+++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c -@@ -772,18 +772,19 @@ EXPORT_SYMBOL(skb_to_contig_fd); - - #ifndef CONFIG_PPC - /* Verify the conditions that trigger the A010022 errata: data unaligned to -- * 16 bytes and 4K memory address crossings. -+ * 16 bytes, 4K memory address crossings and S/G fragments. - */ - static bool a010022_check_skb(struct sk_buff *skb, struct dpa_priv_s *priv) - { -- int nr_frags, i = 0; -- skb_frag_t *frag; -- - /* Check if the headroom is aligned */ - if (((uintptr_t)skb->data - priv->tx_headroom) % - priv->buf_layout[TX].data_align != 0) - return true; - -+ /* Check for paged data in the skb. We do not support S/G fragments */ -+ if (skb_is_nonlinear(skb)) -+ return true; -+ - /* Check if the headroom crosses a boundary */ - if (HAS_DMA_ISSUE(skb->head, skb_headroom(skb))) - return true; -@@ -796,20 +797,6 @@ static bool a010022_check_skb(struct sk_ - if (HAS_DMA_ISSUE(skb->head, skb_end_offset(skb))) - return true; - -- nr_frags = skb_shinfo(skb)->nr_frags; -- -- while (i < nr_frags) { -- frag = &skb_shinfo(skb)->frags[i]; -- -- /* Check if a paged fragment crosses a boundary from its -- * offset to its end. -- */ -- if (HAS_DMA_ISSUE(frag->page_offset, frag->size)) -- return true; -- -- i++; -- } -- - return false; - } - |