[dpdk-dev] [PATCH v3 5/9] ethdev: support multi-host representor

[Xueming Li]

This patch introduces 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(host) 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.

Controller ID is physical host ID in multi-host, for end-user (e.g. OVS)
it is transparent as part of representor syntax, sam as representor
ID, interpreted by PMD.

Signed-off-by: Xueming Li <xuemi...@nvidia.com>
---
 config/rte_config.h                   |  1 +
 lib/librte_ethdev/ethdev_private.c    | 14 ++++++++++++--
 lib/librte_ethdev/rte_ethdev_driver.h |  4 ++++
 3 files changed, 17 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 ccc638ec49..95f1ab847a 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 +105,16 @@ rte_eth_devargs_parse_representor_ports(char *str, void 
*data)
        int ret;
 
        eth_da->type = RTE_ETH_REPRESENTOR_NONE;
+       /* Parse c# */
+       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') {
                eth_da->type = RTE_ETH_REPRESENTOR_PF;
diff --git a/lib/librte_ethdev/rte_ethdev_driver.h 
b/lib/librte_ethdev/rte_ethdev_driver.h
index edb000cbd4..b9e4a0b9ba 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 controllers 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