Comment by DiabloD3

You're conflating two different things.

ROCm isn't part of AMD drivers, its a software library that helps you support legacy compute APIs and stuff in the BLAS/GEMM/LAPACK end of things.

The part of ROCm you're interested in is HIP; HIP is the part that does legacy CUDA emulation. HIP will never be complete because Nvidia keeps adding new things, documents things wrong, and also the "cool" stuff people do on Nvidia cards aren't CUDA and it is out of scope for HIP to emulate PTX (since that is strongly tied to how historical Nvidia architectures worked, and would be entirely inappropriate for AMD architectures).

The whole thing with Tinygrad's "driver" isn't a driver at all, its the infrastructure to handle card to card ccNUMA on PCI-E-based systems, which AMD does not support: if you want that, you buy into the big boy systems that have GPUs that communicate using Infinity Fabric (which it, itself, is the HyperTransport protocol over PCI-E PHY instead of over HyperTransport PHY; PCI over PCI-E has no ability to handle ccNUMA meaningfully).

Extremely few customers, AMD's or not, want to share VRAM directly over PCI-E across GPUs since most PCI-E GPU customers are single GPU. Customers that have massive multi-GPU deployments have bought into the ecosystem of their preferred vendor (ie, Nvidia's Mellanox-powered fabrics, or AMD's wall-to-wall Infinity Fabric).

That said, AMD does want to support it if they can, and Tinygrad isn't interested in waiting for an engineer at AMD to add it, so they're pushing ahead and adding it themselves.

Also, part of Tinygrad's problem is they want it available from ROCm/HIP instead of a standards compliant modern API. ROCm/HIP still has not been ported to the modern shader compiler that the AMD driver uses (ie, the one you use for OpenGL, Vulkan, and Direct family APIs), since it originally came from an unrelated engineering team that isn't part of the driver team.

The big push in AMD currently is to unify efforts so that ROCm/HIP is massively simplified and all the redundant parts are axed, so it is purely a SPIR-V code generator or similar. This would probably help projects like Tinygrad someday, but not today.