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Main Assumption:

The radio_interface_mapping_t structure part of wifi_hal_generic.h is used to define the mapping of phy to a particular radio along with the primary interface. Structure declaration is as below:

typedef struct {
    unsigned int phy_index;                  /* Phy Index */
    unsigned int radio_index;               /* Radio Index, 0 - 2.4G, 1 - 5G, 2 - 6G */
    char radio_name[16];                     /* Readable radio name */
    wifi_interface_name_t interface_name;  / Primary interface associated with the radio */
}__attribute__((packed)) radio_interface_mapping_t;

We will use this structure to map the multiple radio to the same phy.  

For e.g. in case of the current implementation, the elements of the structure for a 3 radio will be as below (indicating different phy index for different radio): 

{ 0, 0, "radio1", "wlan0"},

{ 1, 1,  "radio2", "wlan1"},

{ 2, 2, "radio3", "wlan2"},

In case of single phy, the elements of this structure for a 3 radio will have the same phy mapped to different radio index indicated in green.

{ 0, 0, "radio1", "wlan0"},

{ 0, 1,  "radio2", "wlan1"},

{ 0, 2, "radio3", "wlan2"},

Low Level Design Changes

This section will provide details on the changes in different modules to support Single wiphy usecase.

 1.1.6.1 rdk-wifi-hal

References

• PoC to create interfaces under single Phy using netlink - https://github.com/cpokuru/NetlinkApis/tree/main 

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