96891ceeda
When iwlwifi runs on IOMMU, IOMMU generates a lot of PTE write faults because PTE write bit is not set on some of PTE's. This is because iwlwifi driver calls DMA mapping with PCI_DMA_TODEVICE which is read only in mapping PTE. But iwlwifi device actually writes to the mapped page to update its contents. This issue is not exposed in swiotlb. But VT-d hardware can capture this fault and stop the fault transaction. The iwl TX command contains a scratch field that is updated by uCode to indicate retry counts. For 5000 series the patch is required also for regular frames, but this patch does not differenciate. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Acked-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> |
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.. | ||
iwl-100.c | ||
iwl-3945-fh.h | ||
iwl-3945-hw.h | ||
iwl-3945-led.c | ||
iwl-3945-led.h | ||
iwl-3945-rs.c | ||
iwl-3945.c | ||
iwl-3945.h | ||
iwl-4965-hw.h | ||
iwl-4965.c | ||
iwl-5000-hw.h | ||
iwl-5000.c | ||
iwl-6000-hw.h | ||
iwl-6000.c | ||
iwl-agn-rs.c | ||
iwl-agn-rs.h | ||
iwl-agn.c | ||
iwl-calib.c | ||
iwl-calib.h | ||
iwl-commands.h | ||
iwl-core.c | ||
iwl-core.h | ||
iwl-csr.h | ||
iwl-debug.h | ||
iwl-debugfs.c | ||
iwl-dev.h | ||
iwl-eeprom.c | ||
iwl-eeprom.h | ||
iwl-fh.h | ||
iwl-hcmd.c | ||
iwl-helpers.h | ||
iwl-io.h | ||
iwl-led.c | ||
iwl-led.h | ||
iwl-power.c | ||
iwl-power.h | ||
iwl-prph.h | ||
iwl-rfkill.c | ||
iwl-rfkill.h | ||
iwl-rx.c | ||
iwl-scan.c | ||
iwl-spectrum.c | ||
iwl-spectrum.h | ||
iwl-sta.c | ||
iwl-sta.h | ||
iwl-tx.c | ||
iwl3945-base.c | ||
Kconfig | ||
Makefile |