vfio: move common code out of PCI file

[dpdk.git] / lib / librte_eal / linuxapp / eal / eal_vfio.c

diff --git a/lib/librte_eal/linuxapp/eal/eal_vfio.c b/lib/librte_eal/linuxapp/eal/eal_vfio.c
new file mode 100644 (file)
index 0000000..d3ffebe
--- /dev/null
+++ b/lib/librte_eal/linuxapp/eal/eal_vfio.c
@@ -0,0 +1,79 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <string.h>
+#include <sys/ioctl.h>
+
+#include <rte_log.h>
+#include <rte_memory.h>
+
+#include "eal_vfio.h"
+
+int
+vfio_type1_dma_map(int vfio_container_fd)
+{
+       const struct rte_memseg *ms = rte_eal_get_physmem_layout();
+       int i, ret;
+
+       /* map all DPDK segments for DMA. use 1:1 PA to IOVA mapping */
+       for (i = 0; i < RTE_MAX_MEMSEG; i++) {
+               struct vfio_iommu_type1_dma_map dma_map;
+
+               if (ms[i].addr == NULL)
+                       break;
+
+               memset(&dma_map, 0, sizeof(dma_map));
+               dma_map.argsz = sizeof(struct vfio_iommu_type1_dma_map);
+               dma_map.vaddr = ms[i].addr_64;
+               dma_map.size = ms[i].len;
+               dma_map.iova = ms[i].phys_addr;
+               dma_map.flags = VFIO_DMA_MAP_FLAG_READ | VFIO_DMA_MAP_FLAG_WRITE;
+
+               ret = ioctl(vfio_container_fd, VFIO_IOMMU_MAP_DMA, &dma_map);
+
+               if (ret) {
+                       RTE_LOG(ERR, EAL, "  cannot set up DMA remapping, "
+                                       "error %i (%s)\n", errno, strerror(errno));
+                       return -1;
+               }
+       }
+
+       return 0;
+}
+
+int
+vfio_noiommu_dma_map(int __rte_unused vfio_container_fd)
+{
+       /* No-IOMMU mode does not need DMA mapping */
+       return 0;
+}