bus/fslmc: support dynamic IOVA

[dpdk.git] / drivers / bus / fslmc / fslmc_bus.c

diff --git a/drivers/bus/fslmc/fslmc_bus.c b/drivers/bus/fslmc/fslmc_bus.c
index 54e943d..f0d3a6e 100644 (file)
--- a/drivers/bus/fslmc/fslmc_bus.c
+++ b/drivers/bus/fslmc/fslmc_bus.c
@@ -25,6 +25,7 @@
 #define VFIO_IOMMU_GROUP_PATH "/sys/kernel/iommu_groups"
 
 struct rte_fslmc_bus rte_fslmc_bus;
+uint8_t dpaa2_virt_mode;
 
 static void
 cleanup_fslmc_device_list(void)
@@ -274,6 +275,9 @@ rte_fslmc_probe(void)
                }
        }
 
+       if (rte_eal_iova_mode() == RTE_IOVA_VA)
+               dpaa2_virt_mode = 1;
+
        return 0;
 }
 
@@ -320,12 +324,52 @@ rte_fslmc_driver_unregister(struct rte_dpaa2_driver *driver)
        driver->fslmc_bus = NULL;
 }
 
+/*
+ * All device has iova as va
+ */
+static inline int
+fslmc_all_device_support_iova(void)
+{
+       int ret = 0;
+       struct rte_dpaa2_device *dev;
+       struct rte_dpaa2_driver *drv;
+
+       TAILQ_FOREACH(dev, &rte_fslmc_bus.device_list, next) {
+               TAILQ_FOREACH(drv, &rte_fslmc_bus.driver_list, next) {
+                       ret = rte_fslmc_match(drv, dev);
+                       if (ret)
+                               continue;
+                       /* if the driver is not supporting IOVA */
+                       if (!(drv->drv_flags & RTE_DPAA2_DRV_IOVA_AS_VA))
+                               return 0;
+               }
+       }
+       return 1;
+}
+
 /*
  * Get iommu class of DPAA2 devices on the bus.
  */
 static enum rte_iova_mode
 rte_dpaa2_get_iommu_class(void)
 {
+       bool is_vfio_noiommu_enabled = 1;
+       bool has_iova_va;
+
+       if (TAILQ_EMPTY(&rte_fslmc_bus.device_list))
+               return RTE_IOVA_DC;
+
+       /* check if all devices on the bus support Virtual addressing or not */
+       has_iova_va = fslmc_all_device_support_iova();
+
+#ifdef VFIO_PRESENT
+       is_vfio_noiommu_enabled = rte_vfio_noiommu_is_enabled() == true ?
+                                               true : false;
+#endif
+
+       if (has_iova_va && !is_vfio_noiommu_enabled)
+               return RTE_IOVA_VA;
+
        return RTE_IOVA_PA;
 }