vfio_dma_map:structvfio_iommu_type1_dma_mapmap={ .argsz =sizeof(map), .flags = VFIO_DMA_MAP_FLAG_READ, .vaddr = (__u64)(uintptr_t)vaddr, .iova = iova, .size = size, };ioctl(container- >fd, VFIO_IOMMU_MAP_DMA, &map) 建立映射的关键在于vfio_dma_map,通过ioctl调用container-...
vfio-pci device driver 看dpdk里面怎么用vfio: vfio_type1_dma_map 1staticint2vfio_type1_dma_mem_map(intvfio_container_fd, uint64_t vaddr, uint64_t iova,3uint64_t len,intdo_map)4{5structvfio_iommu_type1_dma_map dma_map;6structvfio_iommu_type1_dma_unmap dma_unmap;7intret;89if(do...
qemu: ioctl(VFIO_IOMMU_MAP_DMA) --- kernel:vfio_iommu_type1_ioctl(VFIO_IOMMU_MAP_DMA) => // 首先从用户空间获得关于iova空间的详细信息(&map),以及iommu的fd(container->fd,也就是/dev/vfio/vfio的fd) => vfio_dma_do_map(container->fd,&map) 内核调用vfio_dmap_do_map实现最终的iova+vaddr...
vfio_cfg:default_vfio_cfg;vfio_container_fd=vfio_cfg->vfio_container_fd;user_mem_maps=&vfio_cfg->mem_maps; ? 将刚刚打开的字符设备添加到container中,并完成iommu的内存映射,在Intel架构中,调用函数vfio_type1_dma_map做映射,DPDK映射的内存有(看上去是所有DPDK管理的内存都做了映射)。。。 获取device ...
在以非root用户身份运行VFIO时遇到了同样的问题，因为这里似乎没有解决方案。我增加了锁定内存的限制，在...
在vfio_pci_core_register_device()内使用WARN_ON来检测错过此的驱动程序vfio_pci_core_register_device(vdev)if(pdev->hdr_type!=PCI_HEADER_TYPE_NORMAL)if(pci_num_vf(pdev))->防止绑定到启用了VF的PF,VF可能正在被主机或其他用户使用。 如果VF已经存在,我们就无法捕获它们,也无法跟踪VF用户。 此处禁用...
主要是执行nvme_ctrlr_probe(&trid, enum_ctx->probe_ctx, pci_dev) 从而构建相应type的ctrl:nvme_transport_ctrlr_construct(trid, &opts, devhandle),这些不放在这里介绍,会在spdk的源码解读里面分析。 rte_pci_register: /* register a driver */ ...
container->enabled) return -EPERM; minsz = offsetofend(struct vfio_iommu_type1_dma_map, size); if (copy_from_user(¶m, (void __user *)arg, minsz)) return -EFAULT; if (param.argsz < minsz) return -EINVAL; if (param.flags & ~(VFIO_DMA_MAP_FLAG_READ |...
* void (dma_register_cb(vfu_ctx_t *vfu_ctx, vfu_dma_info_t *info) { * vfu_map_sg(ctx, ...); * } * * Once vfu_quiesce_done returns, the device is unquiesced. * * * @vfu_ctx: the libvfio-user context * * @returns: 0 on success, -1 on failure with errno set. */ ...
returned in mz->iova is not mapped by VFIO_IOMMU_MAP_DMA so in turn SMMU exception is seen. I'm not sure i follow. How did you determine that to be the case, given that, by your ownadmission below, `vfio_type1_dma_mem_map` function is executed severaltimes?