[dpdk-dev] [PATCH v3 03/11] bsdapp/eal_pci: get iommu class

[Santosh Shukla]

Introducing rte_pci_get_iommu_class API which helps to get iommu class
of PCI device on the bus and returns preferred iova mapping mode for
PCI bus.

Bsdapp case returns default iova mode.

Signed-off-by: Santosh Shukla <santosh.shukla at caviumnetworks.com>
Signed-off-by: Jerin Jacob <jerin.jacob at caviumnetworks.com>
---
 lib/librte_eal/bsdapp/eal/eal_pci.c           | 10 ++++++++++
 lib/librte_eal/bsdapp/eal/rte_eal_version.map |  1 +
 lib/librte_eal/common/include/rte_bus.h       |  9 +++++++++
 lib/librte_eal/common/include/rte_pci.h       | 11 +++++++++++
 4 files changed, 31 insertions(+)

diff --git a/lib/librte_eal/bsdapp/eal/eal_pci.c b/lib/librte_eal/bsdapp/eal/eal_pci.c
index e321461d8..40a951e31 100644
--- a/lib/librte_eal/bsdapp/eal/eal_pci.c
+++ b/lib/librte_eal/bsdapp/eal/eal_pci.c
@@ -405,6 +405,16 @@ rte_pci_scan(void)
 	return -1;
 }
 
+/*
+ * Get iommu class of pci devices on the bus.
+ */
+enum rte_iova_mode
+rte_pci_get_iommu_class(void)
+{
+	/* Supports only RTE_KDRV_NIC_UIO */
+	return RTE_IOVA_PA;
+}
+
 int
 pci_update_device(const struct rte_pci_addr *addr)
 {
diff --git a/lib/librte_eal/bsdapp/eal/rte_eal_version.map b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
index 8d43df0bb..33c2c32c0 100644
--- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
@@ -201,6 +201,7 @@ DPDK_17.08 {
 	rte_bus_find_by_device;
 	rte_bus_find_by_name;
 	rte_pci_match;
+	rte_pci_get_iommu_class;
 
 } DPDK_17.05;
 
diff --git a/lib/librte_eal/common/include/rte_bus.h b/lib/librte_eal/common/include/rte_bus.h
index af9f0e13f..7a0cfb165 100644
--- a/lib/librte_eal/common/include/rte_bus.h
+++ b/lib/librte_eal/common/include/rte_bus.h
@@ -55,6 +55,15 @@ extern "C" {
 /** Double linked list of buses */
 TAILQ_HEAD(rte_bus_list, rte_bus);
 
+
+/**
+ * IOVA mapping mode.
+ */
+enum rte_iova_mode {
+	RTE_IOVA_PA = 1,
+	RTE_IOVA_VA
+};
+
 /**
  * Bus specific scan for devices attached on the bus.
  * For each bus object, the scan would be responsible for finding devices and
diff --git a/lib/librte_eal/common/include/rte_pci.h b/lib/librte_eal/common/include/rte_pci.h
index 4a485674e..c58361132 100644
--- a/lib/librte_eal/common/include/rte_pci.h
+++ b/lib/librte_eal/common/include/rte_pci.h
@@ -383,6 +383,17 @@ int
 rte_pci_match(const struct rte_pci_driver *pci_drv,
 	      const struct rte_pci_device *pci_dev);
 
+
+/**
+ * Get iommu class of PCI devices on the bus.
+ * And return their preferred iova mapping mode.
+ *
+ * @return
+ *   - enum rte_iova_mode.
+ */
+enum rte_iova_mode
+rte_pci_get_iommu_class(void);
+
 /**
  * Map the PCI device resources in user space virtual memory address
  *
-- 
2.13.0