[dpdk-dev] [PATCH v7 5/9] ethdev: support PF index in representor

[Xueming Li]

With Kernel bonding, multiple underlying PFs are bonded, VFs come
from different PF, need to identify representor of VFs unambiguously by
adding PF index.

This patch introduces optional 'pf' section to representor devargs
syntax, examples:
 representor=pf0vf0             - single VF representor
 representor=pf[0-1]sf[0-1023]  - SF representors from 2 PFs

PF type representor is supported by using standalone 'pf' section:
 representor=pf1                - PF representor

Signed-off-by: Xueming Li <xuemingl at nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo at nvidia.com>
Acked-by: Thomas Monjalon <thomas at monjalon.net>
---
 doc/guides/prog_guide/poll_mode_drv.rst |  3 +++
 lib/librte_ethdev/ethdev_private.c      | 19 +++++++++++++++++--
 lib/librte_ethdev/rte_ethdev.h          |  1 +
 3 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/doc/guides/prog_guide/poll_mode_drv.rst b/doc/guides/prog_guide/poll_mode_drv.rst
index 063a4680df..0d4ac77a7c 100644
--- a/doc/guides/prog_guide/poll_mode_drv.rst
+++ b/doc/guides/prog_guide/poll_mode_drv.rst
@@ -382,6 +382,9 @@ parameters to those ports.
    -a DBDF,representor=sf[1,3,5]
    -a DBDF,representor=sf[0-1023]
    -a DBDF,representor=sf[0,2-4,7,9-11]
+   -a DBDF,representor=pf1vf0
+   -a DBDF,representor=pf[0-1]sf[0-127]
+   -a DBDF,representor=pf1
 
 Note: PMDs are not required to support the standard device arguments and users
 should consult the relevant PMD documentation to see support devargs.
diff --git a/lib/librte_ethdev/ethdev_private.c b/lib/librte_ethdev/ethdev_private.c
index 13c191192e..cd87add37f 100644
--- a/lib/librte_ethdev/ethdev_private.c
+++ b/lib/librte_ethdev/ethdev_private.c
@@ -118,8 +118,9 @@ rte_eth_devargs_process_list(char *str, uint16_t *list, uint16_t *len_list,
  *
  * Representor format:
  *   #: range or single number of VF representor - legacy
- *   vf#: VF port representor/s
- *   sf#: SF port representor/s
+ *   [pf#]vf#: VF port representor/s
+ *   [pf#]sf#: SF port representor/s
+ *   pf#:      PF port representor/s
  *
  * Examples of #:
  *  2               - single
@@ -131,6 +132,14 @@ rte_eth_devargs_parse_representor_ports(char *str, void *data)
 {
 	struct rte_eth_devargs *eth_da = data;
 
+	if (str[0] == 'p' && str[1] == 'f') {
+		eth_da->type = RTE_ETH_REPRESENTOR_PF;
+		str += 2;
+		str = rte_eth_devargs_process_list(str, eth_da->ports,
+				&eth_da->nb_ports, RTE_DIM(eth_da->ports));
+		if (str == NULL || str[0] == '\0')
+			goto err;
+	}
 	if (str[0] == 'v' && str[1] == 'f') {
 		eth_da->type = RTE_ETH_REPRESENTOR_VF;
 		str += 2;
@@ -138,11 +147,17 @@ rte_eth_devargs_parse_representor_ports(char *str, void *data)
 		eth_da->type = RTE_ETH_REPRESENTOR_SF;
 		str += 2;
 	} else {
+		/* 'pf' must followed by 'vf' or 'sf'. */
+		if (eth_da->type == RTE_ETH_REPRESENTOR_PF) {
+			str = NULL;
+			goto err;
+		}
 		eth_da->type = RTE_ETH_REPRESENTOR_VF;
 	}
 	str = rte_eth_devargs_process_list(str, eth_da->representor_ports,
 		&eth_da->nb_representor_ports,
 		RTE_DIM(eth_da->representor_ports));
+err:
 	if (str == NULL)
 		RTE_LOG(ERR, EAL, "wrong representor format: %s\n", str);
 	return str == NULL ? -1 : 0;
diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
index 26b5e109c3..9cd519bf59 100644
--- a/lib/librte_ethdev/rte_ethdev.h
+++ b/lib/librte_ethdev/rte_ethdev.h
@@ -1513,6 +1513,7 @@ enum rte_eth_representor_type {
 	RTE_ETH_REPRESENTOR_NONE, /**< not a representor. */
 	RTE_ETH_REPRESENTOR_VF,   /**< representor of Virtual Function. */
 	RTE_ETH_REPRESENTOR_SF,   /**< representor of Sub Function. */
+	RTE_ETH_REPRESENTOR_PF,   /**< representor of Physical Function. */
 };
 
 /**
-- 
2.25.1