diff mbox series

[v4,2/2] ethdev: fix docs of drivers callbacks getting xstats by IDs

Message ID 20210724123314.2970537-2-andrew.rybchenko@oktetlabs.ru (mailing list archive)
State Superseded, archived
Delegated to: Ferruh Yigit
Headers
Series [v4,1/2] ethdev: fix docs of functions getting xstats by IDs |

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Commit Message

Andrew Rybchenko July 24, 2021, 12:33 p.m. UTC 
  From: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>

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.

Fixes: 79c913a42f0 ("ethdev: retrieve xstats by ID")
Cc: stable@dpdk.org

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>
---
 lib/ethdev/ethdev_driver.h | 43 ++++++++++++++++++++++++++++++++++++--
 1 file changed, 41 insertions(+), 2 deletions(-)

Comments

Olivier Matz July 26, 2021, 10:13 a.m. UTC | #1 
On Sat, Jul 24, 2021 at 03:33:14PM +0300, Andrew Rybchenko wrote:
> From: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
> 
> 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.
> 
> Fixes: 79c913a42f0 ("ethdev: retrieve xstats by ID")
> Cc: stable@dpdk.org
> 
> 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>
> ---
>  lib/ethdev/ethdev_driver.h | 43 ++++++++++++++++++++++++++++++++++++--
>  1 file changed, 41 insertions(+), 2 deletions(-)
> 
> diff --git a/lib/ethdev/ethdev_driver.h b/lib/ethdev/ethdev_driver.h
> index 40e474aa7e..fd5b7ca550 100644
> --- a/lib/ethdev/ethdev_driver.h
> +++ b/lib/ethdev/ethdev_driver.h
> @@ -187,11 +187,28 @@ 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
> @@ -218,10 +235,32 @@ 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.
> + * For name count, set @p xstats_names and @p ids to NULL.
> + *
> + * @param dev
> + *   ethdev handle of port.
> + * @param xstats_names
> + *   An rte_eth_xstat_name array of at least *size* elements to
> + *   be filled. Can be NULL together with @p ids to retrieve number of
> + *   available statistics.
> + * @param ids
> + *   IDs array to retrieve specific statistics. Can be NULL together
> + *   with @p xstats_names to retrieve number of available statistics.
> + * @param size
> + *   Size of ids and xstats_names arrays.
> + *   Element count in @p ids and @p xstats_names

I think only the second line should be kept.

Shouldn't we also say here that size should be 0 if arrays are NULL?

> + *
> + * @return
> + *   - A number of filled in stats if both xstats_names and ids are not NULL.
> + *   - A number of available stats if both xstats_names and ids are NULL.
> + *   - 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,
> -- 
> 2.30.2
>
Andrew Rybchenko Sept. 28, 2021, 12:04 p.m. UTC | #2 
On 7/26/21 1:13 PM, Olivier Matz wrote:
> On Sat, Jul 24, 2021 at 03:33:14PM +0300, Andrew Rybchenko wrote:
>> From: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
>>
>> 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.
>>
>> Fixes: 79c913a42f0 ("ethdev: retrieve xstats by ID")
>> Cc: stable@dpdk.org
>>
>> 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>
>> ---
>>  lib/ethdev/ethdev_driver.h | 43 ++++++++++++++++++++++++++++++++++++--
>>  1 file changed, 41 insertions(+), 2 deletions(-)
>>
>> diff --git a/lib/ethdev/ethdev_driver.h b/lib/ethdev/ethdev_driver.h
>> index 40e474aa7e..fd5b7ca550 100644
>> --- a/lib/ethdev/ethdev_driver.h
>> +++ b/lib/ethdev/ethdev_driver.h
>> @@ -187,11 +187,28 @@ 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
>> @@ -218,10 +235,32 @@ 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.
>> + * For name count, set @p xstats_names and @p ids to NULL.
>> + *
>> + * @param dev
>> + *   ethdev handle of port.
>> + * @param xstats_names
>> + *   An rte_eth_xstat_name array of at least *size* elements to
>> + *   be filled. Can be NULL together with @p ids to retrieve number of
>> + *   available statistics.
>> + * @param ids
>> + *   IDs array to retrieve specific statistics. Can be NULL together
>> + *   with @p xstats_names to retrieve number of available statistics.
>> + * @param size
>> + *   Size of ids and xstats_names arrays.
>> + *   Element count in @p ids and @p xstats_names
> 
> I think only the second line should be kept.

Thanks, fixed in v5.

> 
> Shouldn't we also say here that size should be 0 if arrays are NULL?

In this particular case I don't think so. ethdev layer
guarantees that the parameter is 0 if both array pointers
are NULL. PMD should not care about it.

> 
>> + *
>> + * @return
>> + *   - A number of filled in stats if both xstats_names and ids are not NULL.
>> + *   - A number of available stats if both xstats_names and ids are NULL.
>> + *   - 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,
>> -- 
>> 2.30.2
>>
diff mbox series

Patch

diff --git a/lib/ethdev/ethdev_driver.h b/lib/ethdev/ethdev_driver.h
index 40e474aa7e..fd5b7ca550 100644
--- a/lib/ethdev/ethdev_driver.h
+++ b/lib/ethdev/ethdev_driver.h
@@ -187,11 +187,28 @@  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
@@ -218,10 +235,32 @@  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.
+ * For name count, set @p xstats_names and @p ids to NULL.
+ *
+ * @param dev
+ *   ethdev handle of port.
+ * @param xstats_names
+ *   An rte_eth_xstat_name array of at least *size* elements to
+ *   be filled. Can be NULL together with @p ids to retrieve number of
+ *   available statistics.
+ * @param ids
+ *   IDs array to retrieve specific statistics. Can be NULL together
+ *   with @p xstats_names to retrieve number of available statistics.
+ * @param size
+ *   Size of ids and xstats_names arrays.
+ *   Element count in @p ids and @p xstats_names
+ *
+ * @return
+ *   - A number of filled in stats if both xstats_names and ids are not NULL.
+ *   - A number of available stats if both xstats_names and ids are NULL.
+ *   - 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,