[dpdk-dev] [PATCH 01/10] bsdapp/eal_pci: get iommu class

Santosh Shukla santosh.shukla at caviumnetworks.com
Thu Jun 8 13:05:04 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
that 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 |  7 +++++++
 lib/librte_eal/common/include/rte_bus.h       | 10 ++++++++++
 lib/librte_eal/common/include/rte_pci.h       | 11 +++++++++++
 4 files changed, 38 insertions(+)

diff --git a/lib/librte_eal/bsdapp/eal/eal_pci.c b/lib/librte_eal/bsdapp/eal/eal_pci.c
index e321461d8..9c6670964 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)
+{
+	/* Has only one drv (RTE_KDRV_NIC_UIO) so ..*/
+	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 2e48a7366..a9cc3a67e 100644
--- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
@@ -193,3 +193,10 @@ DPDK_17.05 {
 	vfio_get_group_no;
 
 } DPDK_17.02;
+
+DPDK_17.08 {
+	global:
+
+	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 7c3696926..56eacd0c9 100644
--- a/lib/librte_eal/common/include/rte_bus.h
+++ b/lib/librte_eal/common/include/rte_bus.h
@@ -56,6 +56,16 @@ extern "C" {
 /** Double linked list of buses */
 TAILQ_HEAD(rte_bus_list, rte_bus);
 
+
+/**
+ * IOVA mapping mode.
+ */
+enum rte_iova_mode {
+	RTE_IOVA_DC,	/* _DC --> Don't Care mode */
+	RTE_IOVA_PA,
+	RTE_IOVA_VA
+};
+
 /**
  * Bus specific scan for devices attached on the bus.
  * For each bus object, the scan would be reponsible 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 b82ab9e79..bc403123a 100644
--- a/lib/librte_eal/common/include/rte_pci.h
+++ b/lib/librte_eal/common/include/rte_pci.h
@@ -377,6 +377,16 @@ int
 rte_pci_probe(void);
 
 /**
+ * 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
  *
  * Note that driver should not call this function when flag
@@ -472,6 +482,7 @@ int rte_pci_detach(const struct rte_pci_addr *addr);
  */
 void rte_pci_dump(FILE *f);
 
+
 /**
  * Register a PCI driver.
  *
-- 
2.11.0



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