default or selected kernelversion does not have config value CONFIG_INFINIBAND_IONIC.
Result is shown for kernelversion 6.18-rc7

AMD Pensando DSC RDMA/RoCE Support

modulename: ionic_rdma.ko

configname: CONFIG_INFINIBAND_IONIC

Linux Kernel Configuration
└─>Device Drivers
└─>InfiniBand support
└─>Network device support
└─>Ethernet driver support
└─>PCI support
└─>AMD Pensando DSC RDMA/RoCE Support
In linux kernel since version 6.12.57 (release Date: 2025-11-02)  
This enables RDMA/RoCE support for the AMD Pensando family of
Distributed Services Cards (DSCs).

To learn more, visit our website at
<https://www.amd.com/en/products/accelerators/pensando.html>.

To compile this driver as a module, choose M here. The module
will be called ionic_rdma.

source code: