[dpdk-dev] [PATCH v2 12/12] vhost: remove vDPA device count API

[Maxime Coquelin <maxime.coquelin@redhat.com>]

This API is no more useful, this patch removes it.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 drivers/vdpa/ifc/ifcvf_vdpa.c   |   1 +
 drivers/vdpa/mlx5/mlx5_vdpa.h   |   1 +
 lib/librte_vhost/Makefile       |   3 +-
 lib/librte_vhost/meson.build    |   3 +-
 lib/librte_vhost/rte_vdpa.h     | 155 --------------------------------
 lib/librte_vhost/rte_vdpa_dev.h | 147 ++++++++++++++++++++++++++++++
 lib/librte_vhost/vdpa.c         |  10 +--
 lib/librte_vhost/vhost.h        |   1 +
 8 files changed, 155 insertions(+), 166 deletions(-)
 create mode 100644 lib/librte_vhost/rte_vdpa_dev.h

diff --git a/drivers/vdpa/ifc/ifcvf_vdpa.c b/drivers/vdpa/ifc/ifcvf_vdpa.c
index 4163047744..f81d13a2c8 100644
--- a/drivers/vdpa/ifc/ifcvf_vdpa.c
+++ b/drivers/vdpa/ifc/ifcvf_vdpa.c
@@ -16,6 +16,7 @@
 #include <rte_bus_pci.h>
 #include <rte_vhost.h>
 #include <rte_vdpa.h>
+#include <rte_vdpa_dev.h>
 #include <rte_vfio.h>
 #include <rte_spinlock.h>
 #include <rte_log.h>
diff --git a/drivers/vdpa/mlx5/mlx5_vdpa.h b/drivers/vdpa/mlx5/mlx5_vdpa.h
index ea09576c5a..de4154b183 100644
--- a/drivers/vdpa/mlx5/mlx5_vdpa.h
+++ b/drivers/vdpa/mlx5/mlx5_vdpa.h
@@ -12,6 +12,7 @@
 #pragma GCC diagnostic ignored "-Wpedantic"
 #endif
 #include <rte_vdpa.h>
+#include <rte_vdpa_dev.h>
 #include <rte_vhost.h>
 #ifdef PEDANTIC
 #pragma GCC diagnostic error "-Wpedantic"
diff --git a/lib/librte_vhost/Makefile b/lib/librte_vhost/Makefile
index e592795f22..b7ff7dc4b3 100644
--- a/lib/librte_vhost/Makefile
+++ b/lib/librte_vhost/Makefile
@@ -41,7 +41,8 @@ SRCS-$(CONFIG_RTE_LIBRTE_VHOST) := fd_man.c iotlb.c socket.c vhost.c \
 					vhost_user.c virtio_net.c vdpa.c
 
 # install includes
-SYMLINK-$(CONFIG_RTE_LIBRTE_VHOST)-include += rte_vhost.h rte_vdpa.h
+SYMLINK-$(CONFIG_RTE_LIBRTE_VHOST)-include += rte_vhost.h rte_vdpa.h \
+						rte_vdpa_dev.h
 
 # only compile vhost crypto when cryptodev is enabled
 ifeq ($(CONFIG_RTE_LIBRTE_CRYPTODEV),y)
diff --git a/lib/librte_vhost/meson.build b/lib/librte_vhost/meson.build
index f80632848c..882a0eaf41 100644
--- a/lib/librte_vhost/meson.build
+++ b/lib/librte_vhost/meson.build
@@ -21,5 +21,6 @@ cflags += '-fno-strict-aliasing'
 sources = files('fd_man.c', 'iotlb.c', 'socket.c', 'vdpa.c',
 		'vhost.c', 'vhost_user.c',
 		'virtio_net.c', 'vhost_crypto.c')
-headers = files('rte_vhost.h', 'rte_vdpa.h', 'rte_vhost_crypto.h')
+headers = files('rte_vhost.h', 'rte_vdpa.h', 'rte_vdpa_dev.h',
+		'rte_vhost_crypto.h')
 deps += ['ethdev', 'cryptodev', 'hash', 'pci']
diff --git a/lib/librte_vhost/rte_vdpa.h b/lib/librte_vhost/rte_vdpa.h
index eda56dd556..5065e2130e 100644
--- a/lib/librte_vhost/rte_vdpa.h
+++ b/lib/librte_vhost/rte_vdpa.h
@@ -11,13 +11,6 @@
  * Device specific vhost lib
  */
 
-#include <stdbool.h>
-
-#include <rte_pci.h>
-#include "rte_vhost.h"
-
-#define MAX_VDPA_NAME_LEN 128
-
 /** Maximum name length for statistics counters */
 #define RTE_VDPA_STATS_NAME_SIZE 64
 
@@ -48,103 +41,6 @@ struct rte_vdpa_stat_name {
 	char name[RTE_VDPA_STATS_NAME_SIZE]; /**< The statistic name */
 };
 
-/**
- * vdpa device operations
- */
-struct rte_vdpa_dev_ops {
-	/** Get capabilities of this device */
-	int (*get_queue_num)(struct rte_vdpa_device *dev, uint32_t *queue_num);
-
-	/** Get supported features of this device */
-	int (*get_features)(struct rte_vdpa_device *dev, uint64_t *features);
-
-	/** Get supported protocol features of this device */
-	int (*get_protocol_features)(struct rte_vdpa_device *dev,
-			uint64_t *protocol_features);
-
-	/** Driver configure/close the device */
-	int (*dev_conf)(int vid);
-	int (*dev_close)(int vid);
-
-	/** Enable/disable this vring */
-	int (*set_vring_state)(int vid, int vring, int state);
-
-	/** Set features when changed */
-	int (*set_features)(int vid);
-
-	/** Destination operations when migration done */
-	int (*migration_done)(int vid);
-
-	/** Get the vfio group fd */
-	int (*get_vfio_group_fd)(int vid);
-
-	/** Get the vfio device fd */
-	int (*get_vfio_device_fd)(int vid);
-
-	/** Get the notify area info of the queue */
-	int (*get_notify_area)(int vid, int qid,
-			uint64_t *offset, uint64_t *size);
-
-	/** Get statistics name */
-	int (*get_stats_names)(struct rte_vdpa_device *dev,
-			struct rte_vdpa_stat_name *stats_names,
-			unsigned int size);
-
-	/** Get statistics of the queue */
-	int (*get_stats)(struct rte_vdpa_device *dev, int qid,
-			struct rte_vdpa_stat *stats, unsigned int n);
-
-	/** Reset statistics of the queue */
-	int (*reset_stats)(struct rte_vdpa_device *dev, int qid);
-
-	/** Reserved for future extension */
-	void *reserved[2];
-};
-
-/**
- * vdpa device structure includes device address and device operations.
- */
-struct rte_vdpa_device {
-	TAILQ_ENTRY(rte_vdpa_device) next;
-	/** Generic device information */
-	struct rte_device *device;
-	/** vdpa device operations */
-	struct rte_vdpa_dev_ops *ops;
-} __rte_cache_aligned;
-
-/**
- * @warning
- * @b EXPERIMENTAL: this API may change without prior notice
- *
- * Register a vdpa device
- *
- * @param addr
- *  the vdpa device address
- * @param ops
- *  the vdpa device operations
- * @return
- *  vDPA device pointer on success, NULL on failure
- */
-__rte_experimental
-struct rte_vdpa_device *
-rte_vdpa_register_device(struct rte_device *rte_dev,
-		struct rte_vdpa_dev_ops *ops);
-
-/**
- * @warning
- * @b EXPERIMENTAL: this API may change without prior notice
- *
- * Unregister a vdpa device
- *
- * @param did
- *  vDPA device pointer
- * @return
- *  device id on success, -1 on failure
- */
-__rte_experimental
-int
-rte_vdpa_unregister_device(struct rte_vdpa_device *);
-
 /**
  * @warning
  * @b EXPERIMENTAL: this API may change without prior notice
@@ -175,57 +71,6 @@ __rte_experimental
 struct rte_device *
 rte_vdpa_get_rte_device(struct rte_vdpa_device *vdpa_dev);
 
-/**
- * @warning
- * @b EXPERIMENTAL: this API may change without prior notice
- *
- * Get current available vdpa device number
- *
- * @return
- *  available vdpa device number
- */
-__rte_experimental
-int
-rte_vdpa_get_device_num(void);
-
-/**
- * @warning
- * @b EXPERIMENTAL: this API may change without prior notice
- *
- * Enable/Disable host notifier mapping for a vdpa port.
- *
- * @param vid
- *  vhost device id
- * @param enable
- *  true for host notifier map, false for host notifier unmap
- * @return
- *  0 on success, -1 on failure
- */
-__rte_experimental
-int
-rte_vhost_host_notifier_ctrl(int vid, bool enable);
-
-/**
- * @warning
- * @b EXPERIMENTAL: this API may change without prior notice
- *
- * Synchronize the used ring from mediated ring to guest, log dirty
- * page for each writeable buffer, caller should handle the used
- * ring logging before device stop.
- *
- * @param vid
- *  vhost device id
- * @param qid
- *  vhost queue id
- * @param vring_m
- *  mediated virtio ring pointer
- * @return
- *  number of synced used entries on success, -1 on failure
- */
-__rte_experimental
-int
-rte_vdpa_relay_vring_used(int vid, uint16_t qid, void *vring_m);
-
 /**
  * @warning
  * @b EXPERIMENTAL: this API may change without prior notice
diff --git a/lib/librte_vhost/rte_vdpa_dev.h b/lib/librte_vhost/rte_vdpa_dev.h
new file mode 100644
index 0000000000..fecaa8e081
--- /dev/null
+++ b/lib/librte_vhost/rte_vdpa_dev.h
@@ -0,0 +1,147 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+#ifndef _RTE_VDPA_H_DEV_
+#define _RTE_VDPA_H_DEV_
+
+#include <stdbool.h>
+
+#include "rte_vhost.h"
+
+/**
+ * vdpa device operations
+ */
+struct rte_vdpa_dev_ops {
+	/** Get capabilities of this device */
+	int (*get_queue_num)(struct rte_vdpa_device *dev, uint32_t *queue_num);
+
+	/** Get supported features of this device */
+	int (*get_features)(struct rte_vdpa_device *dev, uint64_t *features);
+
+	/** Get supported protocol features of this device */
+	int (*get_protocol_features)(struct rte_vdpa_device *dev,
+			uint64_t *protocol_features);
+
+	/** Driver configure/close the device */
+	int (*dev_conf)(int vid);
+	int (*dev_close)(int vid);
+
+	/** Enable/disable this vring */
+	int (*set_vring_state)(int vid, int vring, int state);
+
+	/** Set features when changed */
+	int (*set_features)(int vid);
+
+	/** Destination operations when migration done */
+	int (*migration_done)(int vid);
+
+	/** Get the vfio group fd */
+	int (*get_vfio_group_fd)(int vid);
+
+	/** Get the vfio device fd */
+	int (*get_vfio_device_fd)(int vid);
+
+	/** Get the notify area info of the queue */
+	int (*get_notify_area)(int vid, int qid,
+			uint64_t *offset, uint64_t *size);
+
+	/** Get statistics name */
+	int (*get_stats_names)(struct rte_vdpa_device *dev,
+			struct rte_vdpa_stat_name *stats_names,
+			unsigned int size);
+
+	/** Get statistics of the queue */
+	int (*get_stats)(struct rte_vdpa_device *dev, int qid,
+			struct rte_vdpa_stat *stats, unsigned int n);
+
+	/** Reset statistics of the queue */
+	int (*reset_stats)(struct rte_vdpa_device *dev, int qid);
+
+	/** Reserved for future extension */
+	void *reserved[2];
+};
+
+/**
+ * vdpa device structure includes device address and device operations.
+ */
+struct rte_vdpa_device {
+	TAILQ_ENTRY(rte_vdpa_device) next;
+	/** Generic device information */
+	struct rte_device *device;
+	/** vdpa device operations */
+	struct rte_vdpa_dev_ops *ops;
+};
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Register a vdpa device
+ *
+ * @param rte_dev
+ *  the generic device pointer
+ * @param ops
+ *  the vdpa device operations
+ * @return
+ *  vDPA device pointer on success, NULL on failure
+ */
+__rte_experimental
+struct rte_vdpa_device *
+rte_vdpa_register_device(struct rte_device *rte_dev,
+		struct rte_vdpa_dev_ops *ops);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Unregister a vdpa device
+ *
+ * @param dev
+ *  vDPA device pointer
+ * @return
+ *  device id on success, -1 on failure
+ */
+__rte_experimental
+int
+rte_vdpa_unregister_device(struct rte_vdpa_device *dev);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Enable/Disable host notifier mapping for a vdpa port.
+ *
+ * @param vid
+ *  vhost device id
+ * @param enable
+ *  true for host notifier map, false for host notifier unmap
+ * @return
+ *  0 on success, -1 on failure
+ */
+__rte_experimental
+int
+rte_vhost_host_notifier_ctrl(int vid, bool enable);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Synchronize the used ring from mediated ring to guest, log dirty
+ * page for each writeable buffer, caller should handle the used
+ * ring logging before device stop.
+ *
+ * @param vid
+ *  vhost device id
+ * @param qid
+ *  vhost queue id
+ * @param vring_m
+ *  mediated virtio ring pointer
+ * @return
+ *  number of synced used entries on success, -1 on failure
+ */
+__rte_experimental
+int
+rte_vdpa_relay_vring_used(int vid, uint16_t qid, void *vring_m);
+
+#endif /* _RTE_VDPA_DEV_H_ */
diff --git a/lib/librte_vhost/vdpa.c b/lib/librte_vhost/vdpa.c
index d7f9839eb2..04c4b25473 100644
--- a/lib/librte_vhost/vdpa.c
+++ b/lib/librte_vhost/vdpa.c
@@ -17,6 +17,7 @@
 #include <rte_tailq.h>
 
 #include "rte_vdpa.h"
+#include "rte_vdpa_dev.h"
 #include "vhost.h"
 
 /** Double linked list of vDPA devices. */
@@ -25,7 +26,6 @@ TAILQ_HEAD(vdpa_device_list, rte_vdpa_device);
 static struct vdpa_device_list vdpa_device_list =
 		TAILQ_HEAD_INITIALIZER(vdpa_device_list);
 static rte_spinlock_t vdpa_device_list_lock = RTE_SPINLOCK_INITIALIZER;
-static uint32_t vdpa_device_num;
 
 
 /* Unsafe, needs to be called with vdpa_device_list_lock held */
@@ -92,7 +92,6 @@ rte_vdpa_register_device(struct rte_device *rte_dev,
 	dev->device = rte_dev;
 	dev->ops = ops;
 	TAILQ_INSERT_TAIL(&vdpa_device_list, dev, next);
-	vdpa_device_num++;
 out_unlock:
 	rte_spinlock_unlock(&vdpa_device_list_lock);
 
@@ -112,7 +111,6 @@ rte_vdpa_unregister_device(struct rte_vdpa_device *dev)
 
 		TAILQ_REMOVE(&vdpa_device_list, dev, next);
 		rte_free(dev);
-		vdpa_device_num--;
 		ret = 0;
 		break;
 	}
@@ -121,12 +119,6 @@ rte_vdpa_unregister_device(struct rte_vdpa_device *dev)
 	return ret;
 }
 
-int
-rte_vdpa_get_device_num(void)
-{
-	return vdpa_device_num;
-}
-
 int
 rte_vdpa_relay_vring_used(int vid, uint16_t qid, void *vring_m)
 {
diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index 819857a65a..941a42637e 100644
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -22,6 +22,7 @@
 
 #include "rte_vhost.h"
 #include "rte_vdpa.h"
+#include "rte_vdpa_dev.h"
 
 /* Used to indicate that the device is running on a data core */
 #define VIRTIO_DEV_RUNNING 1
-- 
2.26.2