From: Ilias Apalodimas <ilias.apalodimas@xxxxxxxxxx> Date: Jul/24/2019, 09:54:27 (UTC+00:00) > Hi David, > > > From: Jon Hunter <jonathanh@xxxxxxxxxx> > > Date: Tue, 23 Jul 2019 13:09:00 +0100 > > > > > Setting "iommu.passthrough=1" works for me. However, I am not sure where > > > to go from here, so any ideas you have would be great. > > > > Then definitely we are accessing outside of a valid IOMMU mapping due > > to the page pool support changes. > > Yes. On the netsec driver i did test with and without SMMU to make sure i am not > breaking anything. > Since we map the whole page on the API i think some offset on the driver causes > that. In any case i'll have another look on page_pool to make sure we are not > missing anything. Ilias, can it be due to this: stmmac_main.c: pp_params.order = DIV_ROUND_UP(priv->dma_buf_sz, PAGE_SIZE); page_pool.c: dma = dma_map_page_attrs(pool->p.dev, page, 0, (PAGE_SIZE << pool->p.order), pool->p.dma_dir, DMA_ATTR_SKIP_CPU_SYNC); "order", will be at least 1 and then mapping the page can cause overlap ? --- Thanks, Jose Miguel Abreu
