> From: Jacob Pan <[email protected]> > Sent: Tuesday, March 15, 2022 1:07 PM > > Some modern accelerators such as Intel's Data Streaming Accelerator (DSA) > require PASID in DMA requests to be operational. Specifically, the work > submissions with ENQCMD on shared work queues require PASIDs. The use > cases > include both user DMA with shared virtual addressing (SVA) and in-kernel > DMA similar to legacy DMA w/o PASID. Here we address the latter. > > DMA mapping API is the de facto standard for in-kernel DMA. However, it > operates on a per device or Requester ID(RID) basis which is not > PASID-aware. To leverage DMA API for devices relies on PASIDs, this > patchset introduces the following APIs > > 1. A driver facing API that enables DMA API PASID usage: > iommu_enable_pasid_dma(struct device *dev, ioasid_t &pasid);
Should this be called dma_enable_pasid() since it's about DMA API? Doing so also avoids the driver to include iommu.h. Thanks Kevin _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
