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.
Signed-off-by: Santosh Shukla <santosh.shu...@caviumnetworks.com>
Signed-off-by: Jerin Jacob <jerin.ja...@caviumnetworks.com>
---
v3 --> v4:
- Created a separate patch per suggestion from Maxime.
Initially thought to squash patch into [01/12] but
then [01/12] will have more context so decided to
keep it as separate patch.
lib/librte_eal/common/include/rte_bus.h | 10 ++++++++++
lib/librte_eal/common/include/rte_pci.h | 11 +++++++++++
2 files changed, 21 insertions(+)
diff --git a/lib/librte_eal/common/include/rte_bus.h
b/lib/librte_eal/common/include/rte_bus.h
index af9f0e13f..e06084253 100644
--- a/lib/librte_eal/common/include/rte_bus.h
+++ b/lib/librte_eal/common/include/rte_bus.h
@@ -55,6 +55,16 @@ extern "C" {
/** Double linked list of buses */
TAILQ_HEAD(rte_bus_list, rte_bus);
+
+/**
+ * IOVA mapping mode.
+ */
+enum rte_iova_mode {
+ RTE_IOVA_DC = 0, /* Don't care mode */
+ RTE_IOVA_PA = (1 << 0),
+ RTE_IOVA_VA = (1 << 1)
+};
+
/**
* 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 47f0532e4..a67d77f22 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
*
--
2.11.0
