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ethdev: update xstats by ID driver callbacks documentation

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Update xstats by IDs callbacks documentation in accordance with
ethdev usage of these callbacks. Document valid combinations of
input arguments to make driver implementation simpler.

Signed-off-by: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>
This commit is contained in:
Ivan Ilchenko 2021-10-01 12:07:21 +03:00 committed by Ferruh Yigit
parent 113778be13
commit 71b5e430a6
1 changed files with 36 additions and 2 deletions
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38
lib/ethdev/ethdev_driver.h
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@ -183,11 +183,28 @@ typedef int (*eth_xstats_get_t)(struct rte_eth_dev *dev,
struct rte_eth_xstat *stats, unsigned int n);
/**< @internal Get extended stats of an Ethernet device. */
/**
* @internal
* Get extended stats of an Ethernet device.
*
* @param dev
* ethdev handle of port.
* @param ids
* IDs array to retrieve specific statistics. Must not be NULL.
* @param values
* A pointer to a table to be filled with device statistics values.
* Must not be NULL.
* @param n
* Element count in @p ids and @p values.
*
* @return
* - A number of filled in stats.
* - A negative value on error.
*/
typedef int (*eth_xstats_get_by_id_t)(struct rte_eth_dev *dev,
const uint64_t *ids,
uint64_t *values,
unsigned int n);
/**< @internal Get extended stats of an Ethernet device. */
/**
* @internal
@ -214,10 +231,27 @@ typedef int (*eth_xstats_get_names_t)(struct rte_eth_dev *dev,
struct rte_eth_xstat_name *xstats_names, unsigned int size);
/**< @internal Get names of extended stats of an Ethernet device. */
/**
* @internal
* Get names of extended stats of an Ethernet device.
*
* @param dev
* ethdev handle of port.
* @param xstats_names
* An rte_eth_xstat_name array of at least @p size elements to be filled.
* Must not be NULL.
* @param ids
* IDs array to retrieve specific statistics. Must not be NULL.
* @param size
* Element count in @p ids and @p xstats_names.
*
* @return
* - A number of filled in stats.
* - A negative value on error.
*/
typedef int (*eth_xstats_get_names_by_id_t)(struct rte_eth_dev *dev,
struct rte_eth_xstat_name *xstats_names, const uint64_t *ids,
unsigned int size);
/**< @internal Get names of extended stats of an Ethernet device. */
typedef int (*eth_queue_stats_mapping_set_t)(struct rte_eth_dev *dev,
uint16_t queue_id,