[dpdk-dev] [PATCH v4 4/9] ethdev: support sub function representor

[Xueming Li <xuemingl@nvidia.com>]

SubFunction is a portion of the PCI device, created on demand, a SF
netdev has its own dedicated queues(txq, rxq). A SF netdev supports
eswitch representation offload similar to existing PF and VF
representors.

To support SF representor, this patch introduces new devargs syntax,
examples:
 representor=sf0               - single SubFunction representor
 representor=sf[1,3,5]         - single list
 representor=sf[0-3],          - single range
 representor=sf[0,2-6,8,10-12] - list with singles and ranges

Signed-off-by: Xueming Li <xuemingl@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
---
 doc/guides/prog_guide/poll_mode_drv.rst |  4 ++++
 lib/librte_ethdev/ethdev_private.c      | 11 +++++++++--
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/doc/guides/prog_guide/poll_mode_drv.rst b/doc/guides/prog_guide/poll_mode_drv.rst
index 0117c2af07..86e5867f1b 100644
--- a/doc/guides/prog_guide/poll_mode_drv.rst
+++ b/doc/guides/prog_guide/poll_mode_drv.rst
@@ -378,6 +378,10 @@ parameters to those ports.
    -a DBDF,representor=vf[0,4,6,9]
    -a DBDF,representor=vf[0-31]
    -a DBDF,representor=vf[0,2-4,7,9-11]
+   -a DBDF,representor=sf0
+   -a DBDF,representor=sf[1,3,5]
+   -a DBDF,representor=sf[0-1023]
+   -a DBDF,representor=sf[0,2-4,7,9-11]
 
 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 ee60b1259a..170b3ef067 100644
--- a/lib/librte_ethdev/ethdev_private.c
+++ b/lib/librte_ethdev/ethdev_private.c
@@ -109,15 +109,22 @@ 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
  */
 int
 rte_eth_devargs_parse_representor_ports(char *str, void *data)
 {
 	struct rte_eth_devargs *eth_da = data;
 
-	eth_da->type = RTE_ETH_REPRESENTOR_VF;
-	if (str[0] == 'v' && str[1] == 'f')
+	if (str[0] == 'v' && str[1] == 'f') {
+		eth_da->type = RTE_ETH_REPRESENTOR_VF;
 		str += 2;
+	} else if (str[0] == 's' && str[1] == 'f') {
+		eth_da->type = RTE_ETH_REPRESENTOR_SF;
+		str += 2;
+	} else {
+		eth_da->type = RTE_ETH_REPRESENTOR_VF;
+	}
 	str = rte_eth_devargs_process_list(str, eth_da->representor_ports,
 		&eth_da->nb_representor_ports, RTE_MAX_ETHPORTS);
 	if (str == NULL)
-- 
2.25.1