diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0025-sdk_dpaa-ls1043a-errata-do-not-recycle-the-realigned.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0025-sdk_dpaa-ls1043a-errata-do-not-recycle-the-realigned.patch | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0025-sdk_dpaa-ls1043a-errata-do-not-recycle-the-realigned.patch b/target/linux/layerscape/patches-5.4/701-net-0025-sdk_dpaa-ls1043a-errata-do-not-recycle-the-realigned.patch new file mode 100644 index 0000000000..4030385be5 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/701-net-0025-sdk_dpaa-ls1043a-errata-do-not-recycle-the-realigned.patch @@ -0,0 +1,61 @@ +From e8c0a77a831843a66b3ac0048aa6c76bc39b0332 Mon Sep 17 00:00:00 2001 +From: Camelia Groza <camelia.groza@nxp.com> +Date: Mon, 4 Sep 2017 14:03:01 +0300 +Subject: [PATCH] sdk_dpaa: ls1043a errata: do not recycle the realigned + buffers + +Signed-off-by: Camelia Groza <camelia.groza@nxp.com> +--- + drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.h | 10 ++++++---- + drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c | 9 +++++++++ + 2 files changed, 15 insertions(+), 4 deletions(-) + +--- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.h ++++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.h +@@ -680,15 +680,17 @@ static inline void _dpa_bp_free_pf(void + put_page(virt_to_head_page(addr)); + } + +-/* TODO: LS1043A SoC has a HW issue regarding FMan DMA transactions; The issue +- * manifests itself at high traffic rates when frames exceed 4K memory +- * boundaries; For the moment, we use a SW workaround to avoid frames larger +- * than 4K or that exceed 4K alignments. ++/* 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 to avoid frames larger than 4K or that exceed 4K ++ * alignments and to realign the frames to 16 bytes. + */ + + #ifndef CONFIG_PPC + extern bool dpaa_errata_a010022; /* SoC affected by A010022 errata */ + ++#define NONREC_MARK 0x01 + #define HAS_DMA_ISSUE(start, size) \ + (((u64)(start) + (size)) > (((u64)(start) + 0x1000) & ~0xFFF)) + #define BOUNDARY_4K(start, size) (((u64)(start) + (u64)(size)) & ~0xFFF) +--- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c ++++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c +@@ -302,6 +302,12 @@ EXPORT_SYMBOL(_dpa_cleanup_tx_fd); + #ifndef CONFIG_FSL_DPAA_TS + bool dpa_skb_is_recyclable(struct sk_buff *skb) + { ++#ifndef CONFIG_PPC ++ /* Do no recycle skbs realigned by the errata workaround */ ++ if (unlikely(dpaa_errata_a010022) && skb->mark == NONREC_MARK) ++ return false; ++#endif ++ + /* No recycling possible if skb buffer is kmalloc'ed */ + if (skb->head_frag == 0) + return false; +@@ -838,6 +844,9 @@ static struct sk_buff *a010022_realign_s + skb_set_network_header(nskb, net_offset); + skb_set_transport_header(nskb, trans_offset); + ++ /* We don't want the buffer to be recycled so we mark it accordingly */ ++ nskb->mark = NONREC_MARK; ++ + dev_kfree_skb(skb); + return nskb; + |