| 114 | } |
| 115 | |
| 116 | static void |
| 117 | async_dma_map(struct virtio_net *dev, bool do_map) |
| 118 | { |
| 119 | int ret = 0; |
| 120 | uint32_t i; |
| 121 | struct guest_page *page; |
| 122 | |
| 123 | if (do_map) { |
| 124 | for (i = 0; i < dev->nr_guest_pages; i++) { |
| 125 | page = &dev->guest_pages[i]; |
| 126 | ret = rte_vfio_container_dma_map(RTE_VFIO_DEFAULT_CONTAINER_FD, |
| 127 | page->host_user_addr, |
| 128 | page->host_iova, |
| 129 | page->size); |
| 130 | if (ret) { |
| 131 | /* |
| 132 | * DMA device may bind with kernel driver, in this case, |
| 133 | * we don't need to program IOMMU manually. However, if no |
| 134 | * device is bound with vfio/uio in DPDK, and vfio kernel |
| 135 | * module is loaded, the API will still be called and return |
| 136 | * with ENODEV. |
| 137 | * |
| 138 | * DPDK vfio only returns ENODEV in very similar situations |
| 139 | * (vfio either unsupported, or supported but no devices found). |
| 140 | * Either way, no mappings could be performed. We treat it as |
| 141 | * normal case in async path. This is a workaround. |
| 142 | */ |
| 143 | if (rte_errno == ENODEV) |
| 144 | return; |
| 145 | |
| 146 | /* DMA mapping errors won't stop VHOST_USER_SET_MEM_TABLE. */ |
| 147 | VHOST_LOG_CONFIG(dev->ifname, ERR, "DMA engine map failed\n"); |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | } else { |
| 152 | for (i = 0; i < dev->nr_guest_pages; i++) { |
| 153 | page = &dev->guest_pages[i]; |
| 154 | ret = rte_vfio_container_dma_unmap(RTE_VFIO_DEFAULT_CONTAINER_FD, |
| 155 | page->host_user_addr, |
| 156 | page->host_iova, |
| 157 | page->size); |
| 158 | if (ret) { |
| 159 | /* like DMA map, ignore the kernel driver case when unmap. */ |
| 160 | if (rte_errno == EINVAL) |
| 161 | return; |
| 162 | |
| 163 | VHOST_LOG_CONFIG(dev->ifname, ERR, "DMA engine unmap failed\n"); |
| 164 | } |
| 165 | } |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | static void |
| 170 | free_mem_region(struct virtio_net *dev) |
no test coverage detected