[v7,8/9] ethdev: representor iterator compare complete info

  The NIC can have multiple PCIe links and can be attached to multiple
hosts, for example the same single NIC can be shared for multiple server
units in the rack. On each PCIe link NIC can provide multiple PFs and
VFs/SFs based on these ones. The full representor identifier consists of
three indices - controller index, PF index, and VF or SF index (if any).

SR-IOV and SubFunction are created on top of PF. PF index is introduced
because there might be multiple PFs in the bonding configuration and
only bonding device is probed.

In eth representor comparator callback, ethdev representor ID was
compared with devarg. Since controller index and PF index not compared,
callback returned representor from other PF or controller.

This patch adds new API to convert representor controller, pf and vf/sf
index to representor ID. Representor comparer callback convert
representor info into ID and compare with device representor ID.

Signed-off-by: Xueming Li <xuemingl@nvidia.com>
---
 lib/librte_ethdev/ethdev_driver.h | 32 +++++++++++
 lib/librte_ethdev/rte_class_eth.c | 38 ++++++++++---
 lib/librte_ethdev/rte_ethdev.c    | 91 +++++++++++++++++++++++++++++++
 lib/librte_ethdev/version.map     |  1 +
 4 files changed, 153 insertions(+), 9 deletions(-)
  

On 3/2/21 2:43 PM, Xueming Li wrote:
> The NIC can have multiple PCIe links and can be attached to multiple
> hosts, for example the same single NIC can be shared for multiple server
> units in the rack. On each PCIe link NIC can provide multiple PFs and
> VFs/SFs based on these ones. The full representor identifier consists of
> three indices - controller index, PF index, and VF or SF index (if any).
> 
> SR-IOV and SubFunction are created on top of PF. PF index is introduced
> because there might be multiple PFs in the bonding configuration and
> only bonding device is probed.
> 
> In eth representor comparator callback, ethdev representor ID was
> compared with devarg. Since controller index and PF index not compared,
> callback returned representor from other PF or controller.
> 
> This patch adds new API to convert representor controller, pf and vf/sf
> index to representor ID. Representor comparer callback convert
> representor info into ID and compare with device representor ID.
> 
> Signed-off-by: Xueming Li <xuemingl@nvidia.com>
> ---
>  lib/librte_ethdev/ethdev_driver.h | 32 +++++++++++
>  lib/librte_ethdev/rte_class_eth.c | 38 ++++++++++---
>  lib/librte_ethdev/rte_ethdev.c    | 91 +++++++++++++++++++++++++++++++
>  lib/librte_ethdev/version.map     |  1 +
>  4 files changed, 153 insertions(+), 9 deletions(-)
> 
> diff --git a/lib/librte_ethdev/ethdev_driver.h b/lib/librte_ethdev/ethdev_driver.h
> index 7b0f392e34..3ff1b90b2f 100644
> --- a/lib/librte_ethdev/ethdev_driver.h
> +++ b/lib/librte_ethdev/ethdev_driver.h
> @@ -1244,6 +1244,38 @@ struct rte_eth_devargs {
>  	enum rte_eth_representor_type type; /* type of representor */
>  };
>  
> +/**
> + * PMD helper function to convert representor ID from location detail

Full stop is missing above.

Also I'm not sure in term "convert" here. It sounds a bit
misleading to me. May be just "get". I.e
PMD helper function to get representor ID by location detail.
and
rte_eth_representor_id_get()

What do you think?

> + *
> + * Convert representor ID from controller, pf and (sf or vf).
> + * The mapping is retrieved from rte_eth_representor_info_get().
> + *
> + * For backward compatibility, if no representor info, direct
> + * map legacy VF (no controller and pf).
> + *
> + * @param ethdev
> + *  Handle of ethdev port.
> + * @param repr_id
> + *  Pointer to converted representor ID.
> + * @param type
> + *  Representor type.
> + * @param controller
> + *  Controller ID, -1 if unspecified.
> + * @param pf
> + *  PF port ID, -1 if unspecified.
> + * @param representor_port
> + *  VF or SF representor port number, -1 if unspecified.

Mixing input and output parameters looks bad to me.
May I suggest to put repr_id the last?
I.e. to have all input parameters first.
(May be I've already mentioned it, if I missed your
reply, please, repeat it once again).

> + *
> + * @return
> + *  Negative errno value on error, 0 on success.
> + */
> +__rte_internal
> +int
> +rte_eth_representor_id_convert(const struct rte_eth_dev *ethdev,
> +			       uint16_t *repr_id,
> +			       enum rte_eth_representor_type type,
> +			       int controller, int pf, int representor_port);
> +
>  /**
>   * PMD helper function to parse ethdev arguments
>   *
> diff --git a/lib/librte_ethdev/rte_class_eth.c b/lib/librte_ethdev/rte_class_eth.c
> index 051c892b40..f7b7e659e7 100644
> --- a/lib/librte_ethdev/rte_class_eth.c
> +++ b/lib/librte_ethdev/rte_class_eth.c
> @@ -65,9 +65,10 @@ eth_representor_cmp(const char *key __rte_unused,
>  {
>  	int ret;
>  	char *values;
> -	const struct rte_eth_dev_data *data = opaque;
> -	struct rte_eth_devargs representors;
> -	uint16_t index;
> +	const struct rte_eth_dev *edev = opaque;
> +	const struct rte_eth_dev_data *data = edev->data;
> +	struct rte_eth_devargs eth_da;
> +	uint16_t id, nc, np, nf, i, c, p, f;
>  
>  	if ((data->dev_flags & RTE_ETH_DEV_REPRESENTOR) == 0)
>  		return -1; /* not a representor port */
> @@ -76,17 +77,36 @@ eth_representor_cmp(const char *key __rte_unused,
>  	values = strdup(value);
>  	if (values == NULL)
>  		return -1;
> -	memset(&representors, 0, sizeof(representors));
> -	ret = rte_eth_devargs_parse_representor_ports(values, &representors);
> +	memset(&eth_da, 0, sizeof(eth_da));
> +	ret = rte_eth_devargs_parse_representor_ports(values, &eth_da);
>  	free(values);
>  	if (ret != 0)
>  		return -1; /* invalid devargs value */
>  
> +	if (eth_da.nb_mh_controllers == 0 && eth_da.nb_ports == 0 &&
> +	    eth_da.nb_representor_ports == 0)
> +		return -1;
> +	nc = eth_da.nb_mh_controllers > 0 ? eth_da.nb_mh_controllers : 1;
> +	np = eth_da.nb_ports > 0 ? eth_da.nb_ports : 1;
> +	nf = eth_da.nb_representor_ports > 0 ? eth_da.nb_representor_ports : 1;
> +
>  	/* Return 0 if representor id is matching one of the values. */
> -	for (index = 0; index < representors.nb_representor_ports; index++)
> -		if (data->representor_id ==
> -				representors.representor_ports[index])
> +	for (i = 0; i < nc * np * nf; ++i) {
> +		c = i / (np * nf);
> +		p = (i / nf) % np;
> +		f = i % nf;
> +		if (rte_eth_representor_id_convert(edev,
> +			&id,
> +			eth_da.type,
> +			eth_da.nb_mh_controllers == 0 ? -1 :
> +					eth_da.mh_controllers[c],
> +			eth_da.nb_ports == 0 ? -1 : eth_da.ports[p],
> +			eth_da.nb_representor_ports == 0 ? -1 :
> +					eth_da.representor_ports[f]) < 0)
> +			continue;
> +		if (data->representor_id == id)
>  			return 0;
> +	}
>  	return -1; /* no match */
>  }
>  
> @@ -112,7 +132,7 @@ eth_dev_match(const struct rte_eth_dev *edev,
>  
>  	ret = rte_kvargs_process(kvlist,
>  			eth_params_keys[RTE_ETH_PARAM_REPRESENTOR],
> -			eth_representor_cmp, edev->data);
> +			eth_representor_cmp, (void *)(uintptr_t)edev);
>  	if (ret != 0)
>  		return -1;
>  	/* search for representor key */
> diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
> index c88e345e7d..78cdef11be 100644
> --- a/lib/librte_ethdev/rte_ethdev.c
> +++ b/lib/librte_ethdev/rte_ethdev.c
> @@ -5623,6 +5623,97 @@ rte_eth_devargs_parse(const char *dargs, struct rte_eth_devargs *eth_da)
>  	return result;
>  }
>  
> +int
> +rte_eth_representor_id_convert(const struct rte_eth_dev *ethdev,
> +			       uint16_t *repr_id,
> +			       enum rte_eth_representor_type type,
> +			       int controller, int pf, int representor_port)
> +{
> +	int ret, n, i, count;
> +	struct rte_eth_representor_info *info = NULL;
> +	size_t size;
> +
> +	if (type == RTE_ETH_REPRESENTOR_NONE)
> +		return 0;
> +	if (repr_id == NULL)
> +		return -EINVAL;
> +
> +	/* Get PMD representor range info. */
> +	ret = rte_eth_representor_info_get(ethdev->data->port_id, NULL);
> +	if (ret < 0) {
> +		if (type == RTE_ETH_REPRESENTOR_VF && controller == -1 &&
> +		    pf == -1) {
> +			/* Direct mapping for legacy VF representor. */
> +			*repr_id = representor_port;
> +			return 0;
> +		} else {
> +			return ret;
> +		}
> +	}
> +	n = ret;
> +	size = sizeof(*info) + n * sizeof(info->ranges[0]);
> +	info = calloc(1, size);
> +	if (info == NULL)
> +		return -ENOMEM;
> +	ret = rte_eth_representor_info_get(ethdev->data->port_id, info);
> +	if (ret < 0)
> +		goto out;
> +
> +	/* Default controller and pf to caller. */
> +	if (controller == -1)
> +		controller = info->controller;
> +	if (pf == -1)
> +		pf = info->pf;
> +
> +	/* Locate representor ID. */
> +	ret = -ENOENT;
> +	for (i = 0; i < n; ++i) {
> +		if (info->ranges[i].type != type)
> +			continue;
> +		/* PMD hit: ignore controller if -1. */
> +		if (info->ranges[i].controller != -1 &&
> +		    info->ranges[i].controller != (uint16_t)controller)

First of all I don't understand why 'controller' is cast to
uint16_t here. Both 'controller' and range->controller have
'int' type.

Second, I'm sorry, but I still don't understand the ignore
logic. Why information retrieval may return -1 for controller
and/or PF? What does it mean?

Above fallback to the device controller and pf if unspecified
by the caller look good and make sense.

> +			continue;
> +		count = info->ranges[i].id_end - info->ranges[i].id_base + 1;
> +		switch (info->ranges[i].type) {
> +		case RTE_ETH_REPRESENTOR_PF:
> +			if (pf >= info->ranges[i].pf + count)
> +				continue;

Condition must be stricter. We must ensure that requested
port within both boundaries of the range.
I.e. representor_port should not be smaller than
info->ranges[i].pf.
It is required for below subtraction.

> +			*repr_id = info->ranges[i].id_base +
> +				   (pf - info->ranges[i].pf);
> +			ret = 0;
> +			goto out;
> +		case RTE_ETH_REPRESENTOR_VF:
> +			/* PMD hit: ignore pf if -1. */
> +			if (info->ranges[i].pf != -1 &&
> +			    info->ranges[i].pf != (uint16_t)pf)

Same as above. Cast seems to be not required.

> +				continue;
> +			if (representor_port >= info->ranges[i].vf + count)

Same as above.

> +				continue;
> +			*repr_id = info->ranges[i].id_base +
> +				   (representor_port - info->ranges[i].vf);
> +			ret = 0;
> +			goto out;
> +		case RTE_ETH_REPRESENTOR_SF:
> +			/* PMD hit: ignore pf if -1. */
> +			if (info->ranges[i].pf != -1 &&
> +			    info->ranges[i].pf != (uint16_t)pf)

Same as above. Cast seems to be not required.

> +				continue;
> +			if (representor_port >= info->ranges[i].sf + count)
> +				continue;

Same as above.

> +			*repr_id = info->ranges[i].id_base +
> +			      (representor_port - info->ranges[i].sf);
> +			ret = 0;
> +			goto out;
> +		default:
> +			break;
> +		}
> +	}
> +out:
> +	free(info);
> +	return ret;
> +}
> +
>  static int
>  eth_dev_handle_port_list(const char *cmd __rte_unused,
>  		const char *params __rte_unused,
> diff --git a/lib/librte_ethdev/version.map b/lib/librte_ethdev/version.map
> index bb6f7436c2..2891f5734e 100644
> --- a/lib/librte_ethdev/version.map
> +++ b/lib/librte_ethdev/version.map
> @@ -268,6 +268,7 @@ INTERNAL {
>  	rte_eth_hairpin_queue_peer_bind;
>  	rte_eth_hairpin_queue_peer_unbind;
>  	rte_eth_hairpin_queue_peer_update;
> +	rte_eth_representor_id_convert;
>  	rte_eth_switch_domain_alloc;
>  	rte_eth_switch_domain_free;
>  };
>
  

>-----Original Message-----
>From: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
>Sent: Tuesday, March 2, 2021 10:10 PM
>To: Xueming(Steven) Li <xuemingl@nvidia.com>
>Cc: dev@dpdk.org; Slava Ovsiienko <viacheslavo@nvidia.com>; Asaf Penso <asafp@nvidia.com>; NBU-Contact-Thomas Monjalon
><thomas@monjalon.net>; Ferruh Yigit <ferruh.yigit@intel.com>; Ray Kinsella <mdr@ashroe.eu>; Neil Horman
><nhorman@tuxdriver.com>
>Subject: Re: [PATCH v7 8/9] ethdev: representor iterator compare complete info
>
>On 3/2/21 2:43 PM, Xueming Li wrote:
>> The NIC can have multiple PCIe links and can be attached to multiple
>> hosts, for example the same single NIC can be shared for multiple
>> server units in the rack. On each PCIe link NIC can provide multiple
>> PFs and VFs/SFs based on these ones. The full representor identifier
>> consists of three indices - controller index, PF index, and VF or SF index (if any).
>>
>> SR-IOV and SubFunction are created on top of PF. PF index is
>> introduced because there might be multiple PFs in the bonding
>> configuration and only bonding device is probed.
>>
>> In eth representor comparator callback, ethdev representor ID was
>> compared with devarg. Since controller index and PF index not
>> compared, callback returned representor from other PF or controller.
>>
>> This patch adds new API to convert representor controller, pf and
>> vf/sf index to representor ID. Representor comparer callback convert
>> representor info into ID and compare with device representor ID.
>>
>> Signed-off-by: Xueming Li <xuemingl@nvidia.com>
>> ---
>>  lib/librte_ethdev/ethdev_driver.h | 32 +++++++++++
>> lib/librte_ethdev/rte_class_eth.c | 38 ++++++++++---
>>  lib/librte_ethdev/rte_ethdev.c    | 91 +++++++++++++++++++++++++++++++
>>  lib/librte_ethdev/version.map     |  1 +
>>  4 files changed, 153 insertions(+), 9 deletions(-)
>>
>> diff --git a/lib/librte_ethdev/ethdev_driver.h
>> b/lib/librte_ethdev/ethdev_driver.h
>> index 7b0f392e34..3ff1b90b2f 100644
>> --- a/lib/librte_ethdev/ethdev_driver.h
>> +++ b/lib/librte_ethdev/ethdev_driver.h
>> @@ -1244,6 +1244,38 @@ struct rte_eth_devargs {
>>  	enum rte_eth_representor_type type; /* type of representor */  };
>>
>> +/**
>> + * PMD helper function to convert representor ID from location detail
>
>Full stop is missing above.
>
>Also I'm not sure in term "convert" here. It sounds a bit misleading to me. May be just "get". I.e PMD helper function to get
>representor ID by location detail.
>and
>rte_eth_representor_id_get()
>
>What do you think?

Looks good, I was struggling on the naming, 'get' looks straightforward, no conversion but lookup, thanks!

>
>> + *
>> + * Convert representor ID from controller, pf and (sf or vf).
>> + * The mapping is retrieved from rte_eth_representor_info_get().
>> + *
>> + * For backward compatibility, if no representor info, direct
>> + * map legacy VF (no controller and pf).
>> + *
>> + * @param ethdev
>> + *  Handle of ethdev port.
>> + * @param repr_id
>> + *  Pointer to converted representor ID.
>> + * @param type
>> + *  Representor type.
>> + * @param controller
>> + *  Controller ID, -1 if unspecified.
>> + * @param pf
>> + *  PF port ID, -1 if unspecified.
>> + * @param representor_port
>> + *  VF or SF representor port number, -1 if unspecified.
>
>Mixing input and output parameters looks bad to me.
>May I suggest to put repr_id the last?
>I.e. to have all input parameters first.
>(May be I've already mentioned it, if I missed your reply, please, repeat it once again).

Make sense

>
>> + *
>> + * @return
>> + *  Negative errno value on error, 0 on success.
>> + */
>> +__rte_internal
>> +int
>> +rte_eth_representor_id_convert(const struct rte_eth_dev *ethdev,
>> +			       uint16_t *repr_id,
>> +			       enum rte_eth_representor_type type,
>> +			       int controller, int pf, int representor_port);
>> +
>>  /**
>>   * PMD helper function to parse ethdev arguments
>>   *
>> diff --git a/lib/librte_ethdev/rte_class_eth.c
>> b/lib/librte_ethdev/rte_class_eth.c
>> index 051c892b40..f7b7e659e7 100644
>> --- a/lib/librte_ethdev/rte_class_eth.c
>> +++ b/lib/librte_ethdev/rte_class_eth.c
>> @@ -65,9 +65,10 @@ eth_representor_cmp(const char *key __rte_unused,
>> {
>>  	int ret;
>>  	char *values;
>> -	const struct rte_eth_dev_data *data = opaque;
>> -	struct rte_eth_devargs representors;
>> -	uint16_t index;
>> +	const struct rte_eth_dev *edev = opaque;
>> +	const struct rte_eth_dev_data *data = edev->data;
>> +	struct rte_eth_devargs eth_da;
>> +	uint16_t id, nc, np, nf, i, c, p, f;
>>
>>  	if ((data->dev_flags & RTE_ETH_DEV_REPRESENTOR) == 0)
>>  		return -1; /* not a representor port */ @@ -76,17 +77,36 @@
>> eth_representor_cmp(const char *key __rte_unused,
>>  	values = strdup(value);
>>  	if (values == NULL)
>>  		return -1;
>> -	memset(&representors, 0, sizeof(representors));
>> -	ret = rte_eth_devargs_parse_representor_ports(values, &representors);
>> +	memset(&eth_da, 0, sizeof(eth_da));
>> +	ret = rte_eth_devargs_parse_representor_ports(values, &eth_da);
>>  	free(values);
>>  	if (ret != 0)
>>  		return -1; /* invalid devargs value */
>>
>> +	if (eth_da.nb_mh_controllers == 0 && eth_da.nb_ports == 0 &&
>> +	    eth_da.nb_representor_ports == 0)
>> +		return -1;
>> +	nc = eth_da.nb_mh_controllers > 0 ? eth_da.nb_mh_controllers : 1;
>> +	np = eth_da.nb_ports > 0 ? eth_da.nb_ports : 1;
>> +	nf = eth_da.nb_representor_ports > 0 ? eth_da.nb_representor_ports :
>> +1;
>> +
>>  	/* Return 0 if representor id is matching one of the values. */
>> -	for (index = 0; index < representors.nb_representor_ports; index++)
>> -		if (data->representor_id ==
>> -				representors.representor_ports[index])
>> +	for (i = 0; i < nc * np * nf; ++i) {
>> +		c = i / (np * nf);
>> +		p = (i / nf) % np;
>> +		f = i % nf;
>> +		if (rte_eth_representor_id_convert(edev,
>> +			&id,
>> +			eth_da.type,
>> +			eth_da.nb_mh_controllers == 0 ? -1 :
>> +					eth_da.mh_controllers[c],
>> +			eth_da.nb_ports == 0 ? -1 : eth_da.ports[p],
>> +			eth_da.nb_representor_ports == 0 ? -1 :
>> +					eth_da.representor_ports[f]) < 0)
>> +			continue;
>> +		if (data->representor_id == id)
>>  			return 0;
>> +	}
>>  	return -1; /* no match */
>>  }
>>
>> @@ -112,7 +132,7 @@ eth_dev_match(const struct rte_eth_dev *edev,
>>
>>  	ret = rte_kvargs_process(kvlist,
>>  			eth_params_keys[RTE_ETH_PARAM_REPRESENTOR],
>> -			eth_representor_cmp, edev->data);
>> +			eth_representor_cmp, (void *)(uintptr_t)edev);
>>  	if (ret != 0)
>>  		return -1;
>>  	/* search for representor key */
>> diff --git a/lib/librte_ethdev/rte_ethdev.c
>> b/lib/librte_ethdev/rte_ethdev.c index c88e345e7d..78cdef11be 100644
>> --- a/lib/librte_ethdev/rte_ethdev.c
>> +++ b/lib/librte_ethdev/rte_ethdev.c
>> @@ -5623,6 +5623,97 @@ rte_eth_devargs_parse(const char *dargs, struct rte_eth_devargs *eth_da)
>>  	return result;
>>  }
>>
>> +int
>> +rte_eth_representor_id_convert(const struct rte_eth_dev *ethdev,
>> +			       uint16_t *repr_id,
>> +			       enum rte_eth_representor_type type,
>> +			       int controller, int pf, int representor_port) {
>> +	int ret, n, i, count;
>> +	struct rte_eth_representor_info *info = NULL;
>> +	size_t size;
>> +
>> +	if (type == RTE_ETH_REPRESENTOR_NONE)
>> +		return 0;
>> +	if (repr_id == NULL)
>> +		return -EINVAL;
>> +
>> +	/* Get PMD representor range info. */
>> +	ret = rte_eth_representor_info_get(ethdev->data->port_id, NULL);
>> +	if (ret < 0) {
>> +		if (type == RTE_ETH_REPRESENTOR_VF && controller == -1 &&
>> +		    pf == -1) {
>> +			/* Direct mapping for legacy VF representor. */
>> +			*repr_id = representor_port;
>> +			return 0;
>> +		} else {
>> +			return ret;
>> +		}
>> +	}
>> +	n = ret;
>> +	size = sizeof(*info) + n * sizeof(info->ranges[0]);
>> +	info = calloc(1, size);
>> +	if (info == NULL)
>> +		return -ENOMEM;
>> +	ret = rte_eth_representor_info_get(ethdev->data->port_id, info);
>> +	if (ret < 0)
>> +		goto out;
>> +
>> +	/* Default controller and pf to caller. */
>> +	if (controller == -1)
>> +		controller = info->controller;
>> +	if (pf == -1)
>> +		pf = info->pf;
>> +
>> +	/* Locate representor ID. */
>> +	ret = -ENOENT;
>> +	for (i = 0; i < n; ++i) {
>> +		if (info->ranges[i].type != type)
>> +			continue;
>> +		/* PMD hit: ignore controller if -1. */
>> +		if (info->ranges[i].controller != -1 &&
>> +		    info->ranges[i].controller != (uint16_t)controller)
>
>First of all I don't understand why 'controller' is cast to uint16_t here. Both 'controller' and range->controller have 'int' type.
>

Yes, I should have removed the cast.

>Second, I'm sorry, but I still don't understand the ignore logic. Why information retrieval may return -1 for controller and/or PF? What
>does it mean?

In some circumstances, PMD don't need the controller and PF, i.e. no bonding and multi-host, it locate device from PCI address.
Since openstack can't tell different case, these info are sent without difference, that's why PMD want to ignore them.

But I have a workaround in PMD now, will remove it in next version. But keeping flexibility might be a good choice IMHO.

>
>Above fallback to the device controller and pf if unspecified by the caller look good and make sense.
>
>> +			continue;
>> +		count = info->ranges[i].id_end - info->ranges[i].id_base + 1;
>> +		switch (info->ranges[i].type) {
>> +		case RTE_ETH_REPRESENTOR_PF:
>> +			if (pf >= info->ranges[i].pf + count)
>> +				continue;
>
>Condition must be stricter. We must ensure that requested port within both boundaries of the range.
>I.e. representor_port should not be smaller than
>info->ranges[i].pf.
>It is required for below subtraction.

Good catch!

>
>> +			*repr_id = info->ranges[i].id_base +
>> +				   (pf - info->ranges[i].pf);
>> +			ret = 0;
>> +			goto out;
>> +		case RTE_ETH_REPRESENTOR_VF:
>> +			/* PMD hit: ignore pf if -1. */
>> +			if (info->ranges[i].pf != -1 &&
>> +			    info->ranges[i].pf != (uint16_t)pf)
>
>Same as above. Cast seems to be not required.
>
>> +				continue;
>> +			if (representor_port >= info->ranges[i].vf + count)
>
>Same as above.
>
>> +				continue;
>> +			*repr_id = info->ranges[i].id_base +
>> +				   (representor_port - info->ranges[i].vf);
>> +			ret = 0;
>> +			goto out;
>> +		case RTE_ETH_REPRESENTOR_SF:
>> +			/* PMD hit: ignore pf if -1. */
>> +			if (info->ranges[i].pf != -1 &&
>> +			    info->ranges[i].pf != (uint16_t)pf)
>
>Same as above. Cast seems to be not required.
>
>> +				continue;
>> +			if (representor_port >= info->ranges[i].sf + count)
>> +				continue;
>
>Same as above.
>
>> +			*repr_id = info->ranges[i].id_base +
>> +			      (representor_port - info->ranges[i].sf);
>> +			ret = 0;
>> +			goto out;
>> +		default:
>> +			break;
>> +		}
>> +	}
>> +out:
>> +	free(info);
>> +	return ret;
>> +}
>> +
>>  static int
>>  eth_dev_handle_port_list(const char *cmd __rte_unused,
>>  		const char *params __rte_unused,
>> diff --git a/lib/librte_ethdev/version.map
>> b/lib/librte_ethdev/version.map index bb6f7436c2..2891f5734e 100644
>> --- a/lib/librte_ethdev/version.map
>> +++ b/lib/librte_ethdev/version.map
>> @@ -268,6 +268,7 @@ INTERNAL {
>>  	rte_eth_hairpin_queue_peer_bind;
>>  	rte_eth_hairpin_queue_peer_unbind;
>>  	rte_eth_hairpin_queue_peer_update;
>> +	rte_eth_representor_id_convert;
>>  	rte_eth_switch_domain_alloc;
>>  	rte_eth_switch_domain_free;
>>  };
>>