Pcie vnet
Mar 04, 2024
hi nv
I have a question about nvdia/drivers/pci/endpoint/functions/pci-epf-tegra-vnet.c
function:
static netdev_tx_t tvnet_ep_start_xmit(struct sk_buff *skb,
struct net_device *ndev)
…
| /* Trigger DMA write from src_iova to dst_iova */ | |
|---|---|
| desc_widx = desc_cnt->wr_cnt % DMA_DESC_COUNT; | |
| ep_dma_virt[desc_widx].size = len; | |
| ep_dma_virt[desc_widx].sar_low = lower_32_bits(src_iova); | |
| ep_dma_virt[desc_widx].sar_high = upper_32_bits(src_iova); | |
| ep_dma_virt[desc_widx].dar_low = lower_32_bits(dst_iova); | |
| ep_dma_virt[desc_widx].dar_high = upper_32_bits(dst_iova); | |
| //Dose this mean writing address to the DMA Address Registers? |