Shay Agroskin a447dbb44d net: ena: set initial DMA width to avoid intel iommu issue ... [ Upstream commit 09323b3bca ] The ENA driver uses the readless mechanism, which uses DMA, to find out what the DMA mask is supposed to be. If DMA is used without setting the dma_mask first, it causes the Intel IOMMU driver to think that ENA is a 32-bit device and therefore disables IOMMU passthrough permanently. This patch sets the dma_mask to be ENA_MAX_PHYS_ADDR_SIZE_BITS=48 before readless initialization in ena_device_init()->ena_com_mmio_reg_read_request_init(), which is large enough to workaround the intel_iommu issue. DMA mask is set again to the correct value after it's received from the device after readless is initialized. The patch also changes the driver to use dma_set_mask_and_coherent() function instead of the two pci_set_dma_mask() and pci_set_consistent_dma_mask() ones. Both methods achieve the same effect. Fixes: 1738cd3ed3 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)") Signed-off-by: Mike Cui <mikecui@amazon.com> Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com> Signed-off-by: Shay Agroskin <shayagr@amazon.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-12-02 08:49:52 +01:00
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Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
ena_admin_defs.h	net: ena: enable the interrupt_moderation in driver_supported_features	2019-09-16 22:06:02 +02:00
ena_com.c	net: ena: fix error returning in ena_com_get_hash_function()	2020-06-22 09:30:51 +02:00
ena_com.h	net: ena: make ena rxfh support ETH_RSS_HASH_NO_CHANGE	2020-03-05 16:43:47 +01:00
ena_common_defs.h	net: ena: complete host info to match latest ENA spec	2018-10-11 10:13:50 -07:00
ena_eth_com.c	net: ena: clean up indentation issue	2019-09-27 20:32:02 +02:00
ena_eth_com.h	net: ena: optimise calculations for CQ doorbell	2019-06-03 13:30:38 -07:00
ena_eth_io_defs.h	net: ena: fix indentations in ena_defs for better readability	2018-10-11 10:13:51 -07:00
ena_ethtool.c	net: ena: make ena rxfh support ETH_RSS_HASH_NO_CHANGE	2020-03-05 16:43:47 +01:00
ena_netdev.c	net: ena: set initial DMA width to avoid intel iommu issue	2020-12-02 08:49:52 +01:00
ena_netdev.h	net/ena: Fix build warning in ena_xdp_set()	2020-05-27 17:46:32 +02:00
ena_pci_id_tbl.h	…
ena_regs_defs.h	net: ena: fix indentations in ena_defs for better readability	2018-10-11 10:13:51 -07:00