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-rw-r--r--src/plugins/dpdk/main.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/src/plugins/dpdk/main.c b/src/plugins/dpdk/main.c
index f2f1ba22ed5..5437e2fafdc 100644
--- a/src/plugins/dpdk/main.c
+++ b/src/plugins/dpdk/main.c
@@ -13,6 +13,13 @@
* limitations under the License.
*/
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <linux/vfio.h>
+#include <sys/ioctl.h>
+
#include <vnet/vnet.h>
#include <vnet/plugin/plugin.h>
#include <dpdk/device/dpdk.h>
@@ -88,9 +95,45 @@ static clib_error_t * dpdk_main_init (vlib_main_t * vm)
VLIB_INIT_FUNCTION (dpdk_main_init);
+
+clib_error_t *
+dpdk_early_init (vlib_main_t *vm)
+{
+ int fd = -1;
+ u64 *pt = 0;
+ clib_error_t *err = 0;
+
+ /* check if pagemap is accessible - if we get zero result
+ dpdk will not be able to get physical memory address and game is over
+ unless we have IOMMU */
+ pt = clib_mem_vm_get_paddr (&pt, min_log2 (sysconf (_SC_PAGESIZE)), 1);
+ if (pt && pt[0])
+ goto done;
+
+ if ((fd = open ("/dev/vfio/vfio", O_RDWR) == -1))
+ goto error;
+
+ if (ioctl (fd, VFIO_GET_API_VERSION) != VFIO_API_VERSION)
+ goto error;
+
+ /* if we have type 1 IOMMU page map is not needed */
+ if (ioctl (fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU) == 1)
+ goto done;
+
+error:
+ err = clib_error_return (0, "access to physical devices is not allowed");
+
+done:
+ if (fd != -1)
+ close (fd);
+ vec_free (pt);
+ return err;
+}
+
/* *INDENT-OFF* */
VLIB_PLUGIN_REGISTER () = {
.version = VPP_BUILD_VER,
.description = "Data Plane Development Kit (DPDK)",
+ .early_init = "dpdk_early_init",
};
/* *INDENT-ON* */