[dpdk-dev] [RFC 2/7] ethdev: support multi-host representor

[Xueming Li]

This patch introduce multi-host controller for ethdev representor
syntax, examples:

[[c#]pf#]vf#: VF port representor/s, example: pf0vf1
[[c#]pf#]sf#: SF port representor/s, example: c1pf1sf[0-3]

c# is controller ID/range in case of multi-host, optional. It is mostly
for SmartNIC attached to multiple hosts in the same rack to allow
routing the packets between PF/SF/VF running on these hosts.

Signed-off-by: Xueming Li <xuemingl at nvidia.com>
---
 config/rte_config.h                   |  1 +
 lib/librte_ethdev/ethdev_private.c    | 13 +++++++++++--
 lib/librte_ethdev/rte_ethdev_driver.h |  4 ++++
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/config/rte_config.h b/config/rte_config.h
index a0b5160ff2..23d02d51ef 100644
--- a/config/rte_config.h
+++ b/config/rte_config.h
@@ -58,6 +58,7 @@
 #define RTE_MAX_QUEUES_PER_PORT 1024
 #define RTE_ETHDEV_QUEUE_STAT_CNTRS 16 /* max 256 */
 #define RTE_ETHDEV_RXTX_CALLBACKS 1
+#define RTE_MAX_MULTI_HOST_CTRLS 4
 
 /* cryptodev defines */
 #define RTE_CRYPTO_MAX_DEVS 64
diff --git a/lib/librte_ethdev/ethdev_private.c b/lib/librte_ethdev/ethdev_private.c
index 2a057c5f36..3e455acea9 100644
--- a/lib/librte_ethdev/ethdev_private.c
+++ b/lib/librte_ethdev/ethdev_private.c
@@ -95,8 +95,8 @@ rte_eth_devargs_process_list(char *str, uint16_t *list, uint16_t *len_list,
 /*
  * representor format:
  *   #: range or single number of VF representor - legacy
- *   [pf#]vf#: VF port representor/s
- *   [pf#]sf#: SF port representor/s
+ *   [[c#]pf#]vf#: VF port representor/s
+ *   [[c#]pf#]sf#: SF port representor/s
  */
 int
 rte_eth_devargs_parse_representor_ports(char *str, void *data)
@@ -105,6 +105,15 @@ rte_eth_devargs_parse_representor_ports(char *str, void *data)
 	int ret;
 
 	eth_da->type = RTE_ETH_REPRESENTOR_NONE;
+	if (str[0] == 'c') {
+		str += 1;
+		ret = rte_eth_devargs_process_list(str, eth_da->mh_controllers,
+				&eth_da->nb_mh_controllers,
+				RTE_DIM(eth_da->mh_controllers));
+		if (ret < 0)
+			goto err;
+		str += ret;
+	}
 	/* parse pf# */
 	if (str[0] == 'p' && str[1] == 'f') {
 		str += 2;
diff --git a/lib/librte_ethdev/rte_ethdev_driver.h b/lib/librte_ethdev/rte_ethdev_driver.h
index edb000cbd4..a7969c9408 100644
--- a/lib/librte_ethdev/rte_ethdev_driver.h
+++ b/lib/librte_ethdev/rte_ethdev_driver.h
@@ -1203,6 +1203,10 @@ enum rte_eth_representor_type {
 
 /** Generic Ethernet device arguments  */
 struct rte_eth_devargs {
+	uint16_t mh_controllers[RTE_MAX_MULTI_HOST_CTRLS];
+	/** controller/s number in case of multi-host */
+	uint16_t nb_mh_controllers;
+	/** number of controllers in multi-host contollerss field */
 	uint16_t ports[RTE_MAX_ETHPORTS];
 	/** port/s number to enable on a multi-port single function */
 	uint16_t nb_ports;
-- 
2.25.1