[dpdk-dev] [PATCH v3 03/11] bsdapp/eal_pci: get iommu class
Santosh Shukla
santosh.shukla at caviumnetworks.com
Tue Jul 11 08:16:23 CEST 2017
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
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