[dpdk-dev,4/7] vhost: add apis for datapath configuration
Checks
Commit Message
This patch adds APIs for datapath configuration. The eid and did of the
vhost-user socket can be configured to identify the actual device.
When the default software datapath is used, eid and did are set to -1.
When alternative datapath is used, eid and did are set by app to specify
which device to use. Each vhost-user socket can have only 1 connection in
this case.
Signed-off-by: Zhihong Wang <zhihong.wang@intel.com>
---
lib/librte_vhost/rte_vhost.h | 68 ++++++++++++++++++++++++++++++++++++++++++++
lib/librte_vhost/socket.c | 65 ++++++++++++++++++++++++++++++++++++++++++
lib/librte_vhost/vhost.c | 44 ++++++++++++++++++++++++++++
lib/librte_vhost/vhost.h | 10 +++++++
4 files changed, 187 insertions(+)
@@ -178,6 +178,50 @@ int rte_vhost_driver_register(const char *path, uint64_t flags);
int rte_vhost_driver_unregister(const char *path);
/**
+ * Set the engine id, enforce single connection per socket
+ *
+ * @param path
+ * The vhost-user socket file path
+ * @param eid
+ * Engine id
+ * @return
+ * 0 on success, -1 on failure
+ */
+int rte_vhost_driver_set_vdpa_eid(const char *path, int eid);
+
+/**
+ * Set the device id, enforce single connection per socket
+ *
+ * @param path
+ * The vhost-user socket file path
+ * @param did
+ * Device id
+ * @return
+ * 0 on success, -1 on failure
+ */
+int rte_vhost_driver_set_vdpa_did(const char *path, int did);
+
+/**
+ * Get the engine id
+ *
+ * @param path
+ * The vhost-user socket file path
+ * @return
+ * Engine id, -1 on failure
+ */
+int rte_vhost_driver_get_vdpa_eid(const char *path);
+
+/**
+ * Get the device id
+ *
+ * @param path
+ * The vhost-user socket file path
+ * @return
+ * Device id, -1 on failure
+ */
+int rte_vhost_driver_get_vdpa_did(const char *path);
+
+/**
* Set the feature bits the vhost-user driver supports.
*
* @param path
@@ -492,6 +536,30 @@ int rte_vhost_vring_call(int vid, uint16_t vring_idx);
*/
uint32_t rte_vhost_rx_queue_count(int vid, uint16_t qid);
+/**
+ * Get vdpa engine id for vhost device.
+ *
+ * @param vid
+ * vhost device ID
+ * @param eid
+ * engine id
+ * @return
+ * engine id
+ */
+int rte_vhost_get_vdpa_eid(int vid);
+
+/**
+ * Get vdpa device id for vhost device.
+ *
+ * @param vid
+ * vhost device ID
+ * @param did
+ * device id
+ * @return
+ * device id
+ */
+int rte_vhost_get_vdpa_did(int vid);
+
#ifdef __cplusplus
}
#endif
@@ -54,6 +54,13 @@ struct vhost_user_socket {
uint64_t protocol_features;
uint16_t queue_num;
+ /* engine and device id to identify a certain port on a specific
+ * backend, both are set to -1 for sw. when used, one socket can
+ * have 1 connection only.
+ */
+ int eid;
+ int did;
+
struct vhost_device_ops const *notify_ops;
};
@@ -524,6 +531,64 @@ find_vhost_user_socket(const char *path)
}
int
+rte_vhost_driver_set_vdpa_eid(const char *path, int eid)
+{
+ struct vhost_user_socket *vsocket;
+
+ pthread_mutex_lock(&vhost_user.mutex);
+ vsocket = find_vhost_user_socket(path);
+ if (vsocket)
+ vsocket->eid = eid;
+ pthread_mutex_unlock(&vhost_user.mutex);
+
+ return vsocket ? 0 : -1;
+}
+
+int
+rte_vhost_driver_set_vdpa_did(const char *path, int did)
+{
+ struct vhost_user_socket *vsocket;
+
+ pthread_mutex_lock(&vhost_user.mutex);
+ vsocket = find_vhost_user_socket(path);
+ if (vsocket)
+ vsocket->did = did;
+ pthread_mutex_unlock(&vhost_user.mutex);
+
+ return vsocket ? 0 : -1;
+}
+
+int
+rte_vhost_driver_get_vdpa_eid(const char *path)
+{
+ struct vhost_user_socket *vsocket;
+ int eid = -1;
+
+ pthread_mutex_lock(&vhost_user.mutex);
+ vsocket = find_vhost_user_socket(path);
+ if (vsocket)
+ eid = vsocket->eid;
+ pthread_mutex_unlock(&vhost_user.mutex);
+
+ return eid;
+}
+
+int
+rte_vhost_driver_get_vdpa_did(const char *path)
+{
+ struct vhost_user_socket *vsocket;
+ int did = -1;
+
+ pthread_mutex_lock(&vhost_user.mutex);
+ vsocket = find_vhost_user_socket(path);
+ if (vsocket)
+ did = vsocket->did;
+ pthread_mutex_unlock(&vhost_user.mutex);
+
+ return did;
+}
+
+int
rte_vhost_driver_disable_features(const char *path, uint64_t features)
{
struct vhost_user_socket *vsocket;
@@ -288,6 +288,8 @@ vhost_new_device(void)
vhost_devices[i] = dev;
dev->vid = i;
dev->slave_req_fd = -1;
+ dev->eid = -1;
+ dev->did = -1;
return i;
}
@@ -316,6 +318,28 @@ vhost_destroy_device(int vid)
}
void
+vhost_set_vdpa_eid(int vid, int eid)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL)
+ return;
+
+ dev->eid = eid;
+}
+
+void
+vhost_set_vdpa_did(int vid, int did)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL)
+ return;
+
+ dev->did = did;
+}
+
+void
vhost_set_ifname(int vid, const char *if_name, unsigned int if_len)
{
struct virtio_net *dev;
@@ -605,3 +629,23 @@ rte_vhost_rx_queue_count(int vid, uint16_t qid)
return *((volatile uint16_t *)&vq->avail->idx) - vq->last_avail_idx;
}
+
+int rte_vhost_get_vdpa_eid(int vid)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL)
+ return -1;
+
+ return dev->eid;
+}
+
+int rte_vhost_get_vdpa_did(int vid)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL)
+ return -1;
+
+ return dev->did;
+}
@@ -19,6 +19,7 @@
#include <rte_rwlock.h>
#include "rte_vhost.h"
+#include "rte_vdpa.h"
/* Used to indicate that the device is running on a data core */
#define VIRTIO_DEV_RUNNING 1
@@ -237,6 +238,12 @@ struct virtio_net {
struct guest_page *guest_pages;
int slave_req_fd;
+
+ /* engine and device id to identify a certain port on a specific
+ * backend, both are set to -1 for sw.
+ */
+ int eid;
+ int did;
} __rte_cache_aligned;
@@ -353,6 +360,9 @@ void free_vq(struct vhost_virtqueue *vq);
int alloc_vring_queue(struct virtio_net *dev, uint32_t vring_idx);
+void vhost_set_vdpa_eid(int vid, int eid);
+void vhost_set_vdpa_did(int vid, int did);
+
void vhost_set_ifname(int, const char *if_name, unsigned int if_len);
void vhost_enable_dequeue_zero_copy(int vid);