From 712cd2987489fe62aedeb24730e730871b1eb627 Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Tue, 6 Sep 2016 14:26:27 +0200 Subject: [PATCH] efi_loader: Allow bouncing for network So far bounce buffers were only used for disk I/O, but network I/O may suffer from the same problem. On platforms that have problems doing DMA on high addresses, let's also bounce outgoing network packets. Incoming ones always already get bounced. This patch fixes EFI PXE boot on ZynqMP for me. Signed-off-by: Alexander Graf --- lib/efi_loader/efi_net.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/lib/efi_loader/efi_net.c b/lib/efi_loader/efi_net.c index dd3b48570d..6a8a0d7b1d 100644 --- a/lib/efi_loader/efi_net.c +++ b/lib/efi_loader/efi_net.c @@ -152,7 +152,14 @@ static efi_status_t EFIAPI efi_net_transmit(struct efi_simple_network *this, return EFI_EXIT(EFI_INVALID_PARAMETER); } +#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER + /* Ethernet packets always fit, just bounce */ + memcpy(efi_bounce_buffer, buffer, buffer_size); + net_send_packet(efi_bounce_buffer, buffer_size); +#else net_send_packet(buffer, buffer_size); +#endif + new_tx_packet = buffer; return EFI_EXIT(EFI_SUCCESS); -- 2.39.5