This patch adds an API to support getting device information.
The driver can use the "rte_vfio_get_device_info" helper to get
device information from EAL.
Signed-off-by: Mingjin Ye <mingjinx...@intel.com>
---
lib/eal/include/rte_vfio.h | 29 +++++++++++++++++++++++++++++
lib/eal/linux/eal_vfio.c | 27 +++++++++++++++++++++++++++
lib/eal/version.map | 3 +++
3 files changed, 59 insertions(+)
diff --git a/lib/eal/include/rte_vfio.h b/lib/eal/include/rte_vfio.h
index 22832afd0f..50c4f5b617 100644
--- a/lib/eal/include/rte_vfio.h
+++ b/lib/eal/include/rte_vfio.h
@@ -17,6 +17,8 @@ extern "C" {
#include <stdbool.h>
#include <stdint.h>
+#include <rte_compat.h>
+
/*
* determine if VFIO is present on the system
*/
@@ -239,6 +241,33 @@ int
rte_vfio_get_group_num(const char *sysfs_base,
const char *dev_addr, int *iommu_group_num);
+/**
+ * Get device information
+ *
+ * This function is only relevant to linux and will return
+ * an error on BSD.
+ *
+ * @param sysfs_base
+ * sysfs path prefix.
+ *
+ * @param dev_addr
+ * device location.
+ *
+ * @param vfio_dev_fd
+ * VFIO fd.
+ *
+ * @param device_info
+ * Device information.
+ *
+ * @return
+ * 0 on success.
+ * <0 on failure.
+ */
+__rte_experimental
+int
+rte_vfio_get_device_info(const char *sysfs_base, const char *dev_addr,
+ int *vfio_dev_fd, struct vfio_device_info *device_info);
+
/**
* Open a new VFIO container fd
*
diff --git a/lib/eal/linux/eal_vfio.c b/lib/eal/linux/eal_vfio.c
index ad3c1654b2..05a0091006 100644
--- a/lib/eal/linux/eal_vfio.c
+++ b/lib/eal/linux/eal_vfio.c
@@ -1222,6 +1222,33 @@ vfio_set_iommu_type(int vfio_container_fd)
return NULL;
}
+int
+rte_vfio_get_device_info(const char *sysfs_base, const char *dev_addr,
+ int *vfio_dev_fd, struct vfio_device_info *device_info)
+{
+ int ret;
+
+ if (!device_info || *vfio_dev_fd < 0)
+ return -1;
+
+ if (*vfio_dev_fd == 0) {
+ ret = rte_vfio_setup_device(sysfs_base, dev_addr,
+ vfio_dev_fd, device_info);
+ if (ret)
+ return -1;
+ } else {
+ ret = ioctl(*vfio_dev_fd, VFIO_DEVICE_GET_INFO, device_info);
+ if (ret) {
+ RTE_LOG(ERR, EAL, "%s cannot get device info, "
+ "error %i (%s)\n", dev_addr, errno,
+ strerror(errno));
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
int
vfio_has_supported_extensions(int vfio_container_fd)
{
diff --git a/lib/eal/version.map b/lib/eal/version.map
index 5e0cd47c82..c06ceaad50 100644
--- a/lib/eal/version.map
+++ b/lib/eal/version.map
@@ -393,6 +393,9 @@ EXPERIMENTAL {
# added in 23.07
rte_memzone_max_get;
rte_memzone_max_set;
+
+ # added in 23.11
+ rte_vfio_get_device_info; # WINDOWS_NO_EXPORT
};
INTERNAL {
--
2.25.1
