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From: Shreyansh Jain <shreyansh.jain@nxp.com>
To: <thomas@monjalon.net>
CC: <dev@dpdk.org>, <hemant.agrawal@nxp.com>, <fiona.trahe@intel.com>,
<rosen.xu@intel.com>, Shreyansh Jain <shreyansh.jain@nxp.com>
Date: Tue, 30 Jan 2018 20:27:03 +0530
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Subject: [dpdk-dev] [PATCH v3 04/11] rawdev: support for extended stats
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Generic rawdev library cannot define a pre-defined set of stats
for devices which are yet to be defined.
This patch introduces the xstats support for rawdev so that any
implementation can create its own statistics.
Signed-off-by: Shreyansh Jain <shreyansh.jain@nxp.com>
---
lib/librte_rawdev/rte_rawdev.c | 75 ++++++++++++++++++++++
lib/librte_rawdev/rte_rawdev.h | 105 +++++++++++++++++++++++++++++++
lib/librte_rawdev/rte_rawdev_pmd.h | 72 +++++++++++++++++++++
lib/librte_rawdev/rte_rawdev_version.map | 4 ++
4 files changed, 256 insertions(+)
diff --git a/lib/librte_rawdev/rte_rawdev.c b/lib/librte_rawdev/rte_rawdev.c
index a6d937c34..d6c284554 100644
--- a/lib/librte_rawdev/rte_rawdev.c
+++ b/lib/librte_rawdev/rte_rawdev.c
@@ -245,6 +245,81 @@ rte_rawdev_dump(uint16_t dev_id, FILE *f)
return (*dev->dev_ops->dump)(dev, f);
}
+static int
+xstats_get_count(uint16_t dev_id)
+{
+ struct rte_rawdev *dev = &rte_rawdevs[dev_id];
+
+ RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->xstats_get_names, -ENOTSUP);
+ return (*dev->dev_ops->xstats_get_names)(dev, NULL, 0);
+}
+
+int __rte_experimental
+rte_rawdev_xstats_names_get(uint16_t dev_id,
+ struct rte_rawdev_xstats_name *xstats_names,
+ unsigned int size)
+{
+ const struct rte_rawdev *dev;
+ int cnt_expected_entries;
+
+ RTE_RAWDEV_VALID_DEVID_OR_ERR_RET(dev_id, -ENODEV);
+
+ cnt_expected_entries = xstats_get_count(dev_id);
+
+ if (xstats_names == NULL || cnt_expected_entries < 0 ||
+ (int)size < cnt_expected_entries || size <= 0)
+ return cnt_expected_entries;
+
+ dev = &rte_rawdevs[dev_id];
+
+ RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->xstats_get_names, -ENOTSUP);
+ return (*dev->dev_ops->xstats_get_names)(dev, xstats_names, size);
+}
+
+/* retrieve rawdev extended statistics */
+int __rte_experimental
+rte_rawdev_xstats_get(uint16_t dev_id,
+ const unsigned int ids[],
+ uint64_t values[],
+ unsigned int n)
+{
+ RTE_RAWDEV_VALID_DEVID_OR_ERR_RET(dev_id, -ENODEV);
+ const struct rte_rawdev *dev = &rte_rawdevs[dev_id];
+
+ RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->xstats_get, -ENOTSUP);
+ return (*dev->dev_ops->xstats_get)(dev, ids, values, n);
+}
+
+uint64_t __rte_experimental
+rte_rawdev_xstats_by_name_get(uint16_t dev_id,
+ const char *name,
+ unsigned int *id)
+{
+ RTE_RAWDEV_VALID_DEVID_OR_ERR_RET(dev_id, 0);
+ const struct rte_rawdev *dev = &rte_rawdevs[dev_id];
+ unsigned int temp = -1;
+
+ if (id != NULL)
+ *id = (unsigned int)-1;
+ else
+ id = &temp; /* driver never gets a NULL value */
+
+ /* implemented by driver */
+ RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->xstats_get_by_name, -ENOTSUP);
+ return (*dev->dev_ops->xstats_get_by_name)(dev, name, id);
+}
+
+int __rte_experimental
+rte_rawdev_xstats_reset(uint16_t dev_id,
+ const uint32_t ids[], uint32_t nb_ids)
+{
+ RTE_RAWDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
+ struct rte_rawdev *dev = &rte_rawdevs[dev_id];
+
+ RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->xstats_reset, -ENOTSUP);
+ return (*dev->dev_ops->xstats_reset)(dev, ids, nb_ids);
+}
+
int __rte_experimental
rte_rawdev_start(uint16_t dev_id)
{
diff --git a/lib/librte_rawdev/rte_rawdev.h b/lib/librte_rawdev/rte_rawdev.h
index b4f9aee37..8e3d72273 100644
--- a/lib/librte_rawdev/rte_rawdev.h
+++ b/lib/librte_rawdev/rte_rawdev.h
@@ -408,6 +408,111 @@ rte_rawdev_dequeue_buffers(uint16_t dev_id,
unsigned int count,
rte_rawdev_obj_t context);
+/** Maximum name length for extended statistics counters */
+#define RTE_RAW_DEV_XSTATS_NAME_SIZE 64
+
+/**
+ * A name-key lookup element for extended statistics.
+ *
+ * This structure is used to map between names and ID numbers
+ * for extended ethdev statistics.
+ */
+struct rte_rawdev_xstats_name {
+ char name[RTE_RAW_DEV_XSTATS_NAME_SIZE];
+};
+
+/**
+ * Retrieve names of extended statistics of a raw device.
+ *
+ * @param dev_id
+ * The identifier of the raw device.
+ * @param[out] xstats_names
+ * Block of memory to insert names into. Must be at least size in capacity.
+ * If set to NULL, function returns required capacity.
+ * @param size
+ * Capacity of xstats_names (number of names).
+ * @return
+ * - positive value lower or equal to size: success. The return value
+ * is the number of entries filled in the stats table.
+ * - positive value higher than size: error, the given statistics table
+ * is too small. The return value corresponds to the size that should
+ * be given to succeed. The entries in the table are not valid and
+ * shall not be used by the caller.
+ * - negative value on error:
+ * -ENODEV for invalid *dev_id*
+ * -ENOTSUP if the device doesn't support this function.
+ */
+int __rte_experimental
+rte_rawdev_xstats_names_get(uint16_t dev_id,
+ struct rte_rawdev_xstats_name *xstats_names,
+ unsigned int size);
+
+/**
+ * Retrieve extended statistics of a raw device.
+ *
+ * @param dev_id
+ * The identifier of the device.
+ * @param ids
+ * The id numbers of the stats to get. The ids can be got from the stat
+ * position in the stat list from rte_rawdev_get_xstats_names(), or
+ * by using rte_rawdev_get_xstats_by_name()
+ * @param[out] values
+ * The values for each stats request by ID.
+ * @param n
+ * The number of stats requested
+ * @return
+ * - positive value: number of stat entries filled into the values array
+ * - negative value on error:
+ * -ENODEV for invalid *dev_id*
+ * -ENOTSUP if the device doesn't support this function.
+ */
+int __rte_experimental
+rte_rawdev_xstats_get(uint16_t dev_id,
+ const unsigned int ids[],
+ uint64_t values[],
+ unsigned int n);
+
+/**
+ * Retrieve the value of a single stat by requesting it by name.
+ *
+ * @param dev_id
+ * The identifier of the device
+ * @param name
+ * The stat name to retrieve
+ * @param[out] id
+ * If non-NULL, the numerical id of the stat will be returned, so that further
+ * requests for the stat can be got using rte_rawdev_xstats_get, which will
+ * be faster as it doesn't need to scan a list of names for the stat.
+ * If the stat cannot be found, the id returned will be (unsigned)-1.
+ * @return
+ * - positive value or zero: the stat value
+ * - negative value: -EINVAL if stat not found, -ENOTSUP if not supported.
+ */
+uint64_t __rte_experimental
+rte_rawdev_xstats_by_name_get(uint16_t dev_id,
+ const char *name,
+ unsigned int *id);
+
+/**
+ * Reset the values of the xstats of the selected component in the device.
+ *
+ * @param dev_id
+ * The identifier of the device
+ * @param ids
+ * Selects specific statistics to be reset. When NULL, all statistics
+ * will be reset. If non-NULL, must point to array of at least
+ * *nb_ids* size.
+ * @param nb_ids
+ * The number of ids available from the *ids* array. Ignored when ids is NULL.
+ * @return
+ * - zero: successfully reset the statistics to zero
+ * - negative value: -EINVAL invalid parameters, -ENOTSUP if not supported.
+ */
+int __rte_experimental
+rte_rawdev_xstats_reset(uint16_t dev_id,
+ const uint32_t ids[],
+ uint32_t nb_ids);
+
#ifdef __cplusplus
}
#endif
diff --git a/lib/librte_rawdev/rte_rawdev_pmd.h b/lib/librte_rawdev/rte_rawdev_pmd.h
index da891dc4d..2ef380988 100644
--- a/lib/librte_rawdev/rte_rawdev_pmd.h
+++ b/lib/librte_rawdev/rte_rawdev_pmd.h
@@ -351,6 +351,69 @@ typedef int (*rawdev_set_attr_t)(struct rte_rawdev *dev,
const char *attr_name,
const uint64_t attr_value);
+/**
+ * Retrieve a set of statistics from device.
+ * Note: Being a raw device, the stats are specific to the device being
+ * implemented thus represented as xstats.
+ *
+ * @param dev
+ * Raw device pointer
+ * @param ids
+ * The stat ids to retrieve
+ * @param values
+ * The returned stat values
+ * @param n
+ * The number of id values and entries in the values array
+ * @return
+ * The number of stat values successfully filled into the values array
+ */
+typedef int (*rawdev_xstats_get_t)(const struct rte_rawdev *dev,
+ const unsigned int ids[], uint64_t values[], unsigned int n);
+
+/**
+ * Resets the statistic values in xstats for the device.
+ */
+typedef int (*rawdev_xstats_reset_t)(struct rte_rawdev *dev,
+ const uint32_t ids[],
+ uint32_t nb_ids);
+
+/**
+ * Get names of extended stats of an raw device
+ *
+ * @param dev
+ * Raw device pointer
+ * @param xstats_names
+ * Array of name values to be filled in
+ * @param size
+ * Number of values in the xstats_names array
+ * @return
+ * When size >= the number of stats, return the number of stat values filled
+ * into the array.
+ * When size < the number of available stats, return the number of stats
+ * values, and do not fill in any data into xstats_names.
+ */
+typedef int (*rawdev_xstats_get_names_t)(const struct rte_rawdev *dev,
+ struct rte_rawdev_xstats_name *xstats_names,
+ unsigned int size);
+
+/**
+ * Get value of one stats and optionally return its id
+ *
+ * @param dev
+ * Raw device pointer
+ * @param name
+ * The name of the stat to retrieve
+ * @param id
+ * Pointer to an unsigned int where we store the stat-id.
+ * This pointer may be null if the id is not required.
+ * @return
+ * The value of the stat, or (uint64_t)-1 if the stat is not found.
+ * If the stat is not found, the id value will be returned as (unsigned)-1,
+ * if id pointer is non-NULL
+ */
+typedef uint64_t (*rawdev_xstats_get_by_name_t)(const struct rte_rawdev *dev,
+ const char *name,
+ unsigned int *id);
/** Rawdevice operations function pointer table */
struct rte_rawdev_ops {
/**< Get device info. */
@@ -386,6 +449,15 @@ struct rte_rawdev_ops {
rawdev_get_attr_t attr_get;
/**< Set an attribute managed by the implementation */
rawdev_set_attr_t attr_set;
+
+ /**< Get extended device statistics. */
+ rawdev_xstats_get_t xstats_get;
+ /**< Get names of extended stats. */
+ rawdev_xstats_get_names_t xstats_get_names;
+ /**< Get one value by name. */
+ rawdev_xstats_get_by_name_t xstats_get_by_name;
+ /**< Reset the statistics values in xstats. */
+ rawdev_xstats_reset_t xstats_reset;
};
/**
diff --git a/lib/librte_rawdev/rte_rawdev_version.map b/lib/librte_rawdev/rte_rawdev_version.map
index bafe2c5de..469b78d81 100644
--- a/lib/librte_rawdev/rte_rawdev_version.map
+++ b/lib/librte_rawdev/rte_rawdev_version.map
@@ -19,6 +19,10 @@ EXPERIMENTAL {
rte_rawdev_socket_id;
rte_rawdev_start;
rte_rawdev_stop;
+ rte_rawdev_xstats_by_name_get;
+ rte_rawdev_xstats_get;
+ rte_rawdev_xstats_names_get;
+ rte_rawdev_xstats_reset;
rte_rawdevs;
local: *;
--
2.14.1