rawdev: fix missing queue count API

Rawdev queue count API prototype was declared, but the definition was
missing from the library. This patch implements the function.

This API is used to query the device about the count of queues it has
been configured with.

Fixes: c88b3f2558ed ("rawdev: introduce raw device library")
Cc: stable@dpdk.org
Suggested-by: Keith Wiles <keith.wiles@intel.com>
Signed-off-by: Shreyansh Jain <shreyansh.jain@nxp.com>

diff --git a/lib/librte_rawdev/rte_rawdev.c b/lib/librte_rawdev/rte_rawdev.c
index 7378bfedeb9e08ee9cd8c78ee60f4bfc878af779..62b6b97ef3130e7e5daff6b5ab139d7376911556 100644 (file)
--- a/lib/librte_rawdev/rte_rawdev.c
+++ b/lib/librte_rawdev/rte_rawdev.c
@@ -172,6 +172,18 @@ rte_rawdev_queue_release(uint16_t dev_id, uint16_t queue_id)
        return (*dev->dev_ops->queue_release)(dev, queue_id);
 }
 
+uint16_t
+rte_rawdev_queue_count(uint16_t dev_id)
+{
+       struct rte_rawdev *dev;
+
+       RTE_RAWDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
+       dev = &rte_rawdevs[dev_id];
+
+       RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->queue_count, -ENOTSUP);
+       return (*dev->dev_ops->queue_count)(dev);
+}
+
 int
 rte_rawdev_get_attr(uint16_t dev_id,
                    const char *attr_name,

diff --git a/lib/librte_rawdev/rte_rawdev.h b/lib/librte_rawdev/rte_rawdev.h
index 7988e76af82ab8cb59cba5379124ecbf4e347134..684bfdb81a24b4a534f3d938ed77ae2a4d13925e 100644 (file)
--- a/lib/librte_rawdev/rte_rawdev.h
+++ b/lib/librte_rawdev/rte_rawdev.h
@@ -182,6 +182,7 @@ rte_rawdev_queue_setup(uint16_t dev_id,
  */
 int
 rte_rawdev_queue_release(uint16_t dev_id, uint16_t queue_id);
+
 /**
  * Get the number of raw queues on a specific raw device
  *

diff --git a/lib/librte_rawdev/rte_rawdev_pmd.h b/lib/librte_rawdev/rte_rawdev_pmd.h
index 6d6cf14a14c9c24389d80e7418b1f454efefa08a..bb9bbc350a4b9b9f6d9d592655eaeb37cecc5a95 100644 (file)
--- a/lib/librte_rawdev/rte_rawdev_pmd.h
+++ b/lib/librte_rawdev/rte_rawdev_pmd.h
@@ -250,6 +250,24 @@ typedef int (*rawdev_queue_setup_t)(struct rte_rawdev *dev,
 typedef int (*rawdev_queue_release_t)(struct rte_rawdev *dev,
                                      uint16_t queue_id);
 
+/**
+ * Get the count of number of queues configured on this device.
+ *
+ * Another way to fetch this information is to fetch the device configuration.
+ * But, that assumes that the device configuration managed by the driver has
+ * that kind of information.
+ *
+ * This function helps in getting queue count supported, independently. It
+ * can help in cases where iterator needs to be implemented.
+ *
+ * @param
+ *   Raw device pointer
+ * @return
+ *   Number of queues; 0 is assumed to be a valid response.
+ *
+ */
+typedef uint16_t (*rawdev_queue_count_t)(struct rte_rawdev *dev);
+
 /**
  * Enqueue an array of raw buffers to the device.
  *
@@ -506,6 +524,8 @@ struct rte_rawdev_ops {
        rawdev_queue_setup_t queue_setup;
        /**< Release an raw queue. */
        rawdev_queue_release_t queue_release;
+       /**< Get the number of queues attached to the device */
+       rawdev_queue_count_t queue_count;
 
        /**< Enqueue an array of raw buffers to device. */
        rawdev_enqueue_bufs_t enqueue_bufs;

diff --git a/lib/librte_rawdev/rte_rawdev_version.map b/lib/librte_rawdev/rte_rawdev_version.map
index f5be52df9ab75bbf3b4c294c3e1ecbe65e973396..b61dbff11c63c9974294603001dd0ffe6cfdcd4c 100644 (file)
--- a/lib/librte_rawdev/rte_rawdev_version.map
+++ b/lib/librte_rawdev/rte_rawdev_version.map
@@ -16,6 +16,7 @@ DPDK_18.08 {
        rte_rawdev_pmd_allocate;
        rte_rawdev_pmd_release;
        rte_rawdev_queue_conf_get;
+       rte_rawdev_queue_count;
        rte_rawdev_queue_setup;
        rte_rawdev_queue_release;
        rte_rawdev_reset;