New upstream version 17.11-rc3

[deb_dpdk.git] / lib / librte_eal / common / eal_common_bus.c

diff --git a/lib/librte_eal/common/eal_common_bus.c b/lib/librte_eal/common/eal_common_bus.c
index 08bec2d..3e022d5 100644 (file)
--- a/lib/librte_eal/common/eal_common_bus.c
+++ b/lib/librte_eal/common/eal_common_bus.c
@@ -35,6 +35,7 @@
 #include <sys/queue.h>
 
 #include <rte_bus.h>
+#include <rte_debug.h>
 
 #include "eal_private.h"
 
@@ -73,11 +74,9 @@ rte_bus_scan(void)
 
        TAILQ_FOREACH(bus, &rte_bus_list, next) {
                ret = bus->scan();
-               if (ret) {
+               if (ret)
                        RTE_LOG(ERR, EAL, "Scan for (%s) bus failed.\n",
                                bus->name);
-                       return ret;
-               }
        }
 
        return 0;
@@ -97,20 +96,16 @@ rte_bus_probe(void)
                }
 
                ret = bus->probe();
-               if (ret) {
+               if (ret)
                        RTE_LOG(ERR, EAL, "Bus (%s) probe failed.\n",
                                bus->name);
-                       return ret;
-               }
        }
 
        if (vbus) {
                ret = vbus->probe();
-               if (ret) {
+               if (ret)
                        RTE_LOG(ERR, EAL, "Bus (%s) probe failed.\n",
                                vbus->name);
-                       return ret;
-               }
        }
 
        return 0;
@@ -152,15 +147,16 @@ struct rte_bus *
 rte_bus_find(const struct rte_bus *start, rte_bus_cmp_t cmp,
             const void *data)
 {
-       struct rte_bus *bus = NULL;
+       struct rte_bus *bus;
 
-       TAILQ_FOREACH(bus, &rte_bus_list, next) {
-               if (start && bus == start) {
-                       start = NULL; /* starting point found */
-                       continue;
-               }
+       if (start != NULL)
+               bus = TAILQ_NEXT(start, next);
+       else
+               bus = TAILQ_FIRST(&rte_bus_list);
+       while (bus != NULL) {
                if (cmp(bus, data) == 0)
                        break;
+               bus = TAILQ_NEXT(bus, next);
        }
        return bus;
 }
@@ -222,3 +218,26 @@ rte_bus_find_by_device_name(const char *str)
                c[0] = '\0';
        return rte_bus_find(NULL, bus_can_parse, name);
 }
+
+
+/*
+ * Get iommu class of devices on the bus.
+ */
+enum rte_iova_mode
+rte_bus_get_iommu_class(void)
+{
+       int mode = RTE_IOVA_DC;
+       struct rte_bus *bus;
+
+       TAILQ_FOREACH(bus, &rte_bus_list, next) {
+
+               if (bus->get_iommu_class)
+                       mode |= bus->get_iommu_class();
+       }
+
+       if (mode != RTE_IOVA_VA) {
+               /* Use default IOVA mode */
+               mode = RTE_IOVA_PA;
+       }
+       return mode;
+}