doc organization (#1197)

* doc organization

* removing what is rccl file

* Update index.rst

docs/index.rst

@@ -8,10 +8,16 @@
 RCCL documentation
 ===========================
 
-Welcome to the ROCm Collective Communication Library (RCCL) docs home page! To learn more, see :ref:`what-is-rccl`.
+RCCL (pronounced “Rickel”) is a stand-alone library that provides multi-GPU and multi-node collective communication primitives optimized for AMD GPUs.
+It implements routines such as ``all-reduce``, ``all-gather``, ``reduce``, ``broadcast``, ``reduce-scatter``, ``gather``, ``scatter``, ``all-to-allv``, and ``all-to-all`` as well as direct point-to-point (GPU-to-GPU) send and receive operations.
+The provided collective communication routines are implemented using Ring and Tree algorithms. They are optimized to achieve high bandwidth and low latency by leveraging topology awareness, high-speed interconnects, and RDMA based collectives. 
 
-Our documentation is structured as follows:
+RCCL utilizes PCIe and xGMI high-speed interconnects for intra-node communication as well as InfiniBand, RoCE, and TCP/IP for inter-node communication.
+It supports an arbitrary number of GPUs installed in a single-node or multi-node platform and can be easily integrated into single- or multi-process (e.g., MPI) applications.
 
+You can access RCCL code on our `GitHub repository <https://github.com/ROCm/rccl>`_.
+
+The documentation is structured as follows:
 
 .. grid:: 2
   :gutter: 3

docs/sphinx/_toc.yml.in

@@ -1,12 +1,11 @@
 root: index
 subtrees:
-- entries:
-  - file: what-is-rccl
+
 - caption: API reference 
   entries:
-  - file: library-specification
+  - file: api-reference/library-specification
     title: Library specification
-  - file: api-library
+  - file: api-reference/api-library
   
 - caption: About
   entries:

docs/what-is-rccl.rst

@@ -1,16 +0,0 @@
-.. meta::
-   :description: RCCL is a stand-alone library that provides multi-GPU and multi-node collective communication primitives optimized for AMD GPUs
-   :keywords: RCCL, ROCm, library, API
-
-.. _what-is-rccl:
-
-=====================
-What is RCCL?
-=====================
-
-RCCL (pronounced “Rickel”) is a stand-alone library that provides multi-GPU and multi-node collective communication primitives optimized for AMD GPUs.
-It implements routines such as `all-reduce`, `all-gather`, `reduce`, `broadcast`, `reduce-scatter`, `gather`, `scatter`, `all-to-allv`, and `all-to-all` as well as direct point-to-point (GPU-to-GPU) send and receive operations.
-The provided collective communication routines are implemented using Ring and Tree algorithms. They are optimized to achieve high bandwidth and low latency by leveraging topology awareness, high-speed interconnects, and RDMA based collectives. 
-
-RCCL utilizes PCIe and xGMI high-speed interconnects for intra-node communication as well as InfiniBand, RoCE, and TCP/IP for inter-node communication.
-It supports an arbitrary number of GPUs installed in a single-node or multi-node platform and can be easily integrated into single- or multi-process (e.g., MPI) applications.