eal: expose internal config elements

Some internal configuration elements set by the user on the command line
are necessary outside the EAL, when the PCI bus is detached.

Expose:
  + rte_eal_create_uio_dev
  + rte_eal_has_pci
  + rte_eal_vfio_intr_mode

Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>

lib/librte_eal/bsdapp/eal/eal.c

@@ -723,3 +723,19 @@ rte_eal_process_type(void)
 {
 	return rte_config.process_type;
 }
+
+int rte_eal_has_pci(void)
+{
+	return !internal_config.no_pci;
+}
+
+int rte_eal_create_uio_dev(void)
+{
+	return internal_config.create_uio_dev;
+}
+
+enum rte_intr_mode
+rte_eal_vfio_intr_mode(void)
+{
+	return RTE_INTR_MODE_NONE;
+}

lib/librte_eal/common/include/rte_eal.h

@@ -47,6 +47,8 @@
 #include <rte_config.h>
 #include <rte_bus.h>
 
+#include <rte_pci_dev_feature_defs.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -267,6 +269,32 @@ rte_set_application_usage_hook(rte_usage_hook_t usage_func);
  */
 int rte_eal_has_hugepages(void);
 
+/**
+ * Whether EAL is using PCI bus.
+ * Disabled by --no-pci option.
+ *
+ * @return
+ *   Nonzero if the PCI bus is enabled.
+ */
+int rte_eal_has_pci(void);
+
+/**
+ * Whether the EAL was asked to create UIO device.
+ *
+ * @return
+ *   Nonzero if true.
+ */
+int rte_eal_create_uio_dev(void);
+
+/**
+ * The user-configured vfio interrupt mode.
+ *
+ * @return
+ *   Interrupt mode configured with the command line,
+ *   RTE_INTR_MODE_NONE by default.
+ */
+enum rte_intr_mode rte_eal_vfio_intr_mode(void);
+
 /**
  * A wrap API for syscall gettid.
  *

lib/librte_eal/linuxapp/eal/eal.c

@@ -989,6 +989,22 @@ int rte_eal_has_hugepages(void)
 	return ! internal_config.no_hugetlbfs;
 }
 
+int rte_eal_has_pci(void)
+{
+	return !internal_config.no_pci;
+}
+
+int rte_eal_create_uio_dev(void)
+{
+	return internal_config.create_uio_dev;
+}
+
+enum rte_intr_mode
+rte_eal_vfio_intr_mode(void)
+{
+	return internal_config.vfio_intr_mode;
+}
+
 int
 rte_eal_check_module(const char *module_name)
 {

lib/librte_eal/rte_eal_version.map

@@ -241,10 +241,13 @@ EXPERIMENTAL {
 DPDK_17.11 {
 	global:
 
+	rte_eal_create_uio_dev;
 	rte_bus_get_iommu_class;
+	rte_eal_has_pci;
 	rte_eal_iova_mode;
 	rte_eal_mbuf_default_mempool_ops;
 	rte_eal_using_phys_addrs;
+	rte_eal_vfio_intr_mode;
 	rte_lcore_has_role;
 	rte_memcpy_ptr;
 	rte_pci_get_iommu_class;