net: designware: Invalidate RX buffer cache before freeing the DMA descriptor
In IPv6 context, the ICMP and UDP checksum byte in the RX packet is initially set to 0, recaclculated, and then re-inserted. This process can result in a dirty cache line. To prevent issues, it is essential to invalidate cache for the RX buffer before freeing the descriptor for next DMA transfer. This ensure that the dirty cache line doesn't inadvertently written back due to cache eviction, there by corrupting the RX buffer Signed-off-by: Parvathi Bhogaraju <pbhogaraju@microsoft.com> Signed-off-by: Jim Liu <JJLIU0@nuvoton.com>
This commit is contained in:
parent
b4e9b524f7
commit
3d98b8c504
|
@ -554,6 +554,11 @@ static int _dw_free_pkt(struct dw_eth_dev *priv)
|
|||
ulong desc_start = (ulong)desc_p;
|
||||
ulong desc_end = desc_start +
|
||||
roundup(sizeof(*desc_p), ARCH_DMA_MINALIGN);
|
||||
ulong data_start = desc_p->dmamac_addr;
|
||||
ulong data_end = data_start + roundup(CFG_ETH_BUFSIZE, ARCH_DMA_MINALIGN);
|
||||
|
||||
/* Invalidate the descriptor buffer data */
|
||||
invalidate_dcache_range(data_start, data_end);
|
||||
|
||||
/*
|
||||
* Make the current descriptor valid again and go to
|
||||
|
|
Loading…
Reference in New Issue
Block a user