From: Rodrigo Siqueira Date: Wed, 19 Nov 2025 00:45:53 +0000 (-0700) Subject: Documentation/gpu: Add more information about GC X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=03a48f07aa89ee72c2cfcc0be70858a745b2a573;p=thirdparty%2Fkernel%2Flinux.git Documentation/gpu: Add more information about GC This commit introduces set of information that details the different sets of schedulers available in the SE. Cc: Alex Deucher Cc: Christian König Cc: Timur Kristóf Signed-off-by: Rodrigo Siqueira Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- diff --git a/Documentation/gpu/amdgpu/gc/index.rst b/Documentation/gpu/amdgpu/gc/index.rst index ff6e9ef5cbeec..b6b583c9dc6a4 100644 --- a/Documentation/gpu/amdgpu/gc/index.rst +++ b/Documentation/gpu/amdgpu/gc/index.rst @@ -7,19 +7,21 @@ The relationship between the CPU and GPU can be described as the producer-consumer problem, where the CPU fills out a buffer with operations (producer) to be executed by the GPU (consumer). The requested operations in -the buffer are called Command Packets, which can be summarized as a compressed -way of transmitting command information to the graphics controller. +the buffer are called **Command Packets**, which can be summarized as a +compressed way of transmitting command information to the graphics controller. The component that acts as the front end between the CPU and the GPU is called -the Command Processor (CP). This component is responsible for providing greater -flexibility to the GC since CP makes it possible to program various aspects of -the GPU pipeline. CP also coordinates the communication between the CPU and GPU -via a mechanism named **Ring Buffers**, where the CPU appends information to -the buffer while the GPU removes operations. It is relevant to highlight that a -CPU can add a pointer to the Ring Buffer that points to another region of -memory outside the Ring Buffer, and CP can handle it; this mechanism is called -**Indirect Buffer (IB)**. CP receives and parses the Command Streams (CS), and -writes the operations to the correct hardware blocks. +**Command Processor (CP)**. This component is responsible for providing greater +flexibility to the **Graphics and Compute (GC)** since CP makes it possible to +program various aspects of the GPU pipeline. CP also coordinates the +communication between the CPU and GPU via a mechanism named **Ring Buffers**, +where the CPU appends information to the buffer while the GPU removes +operations. CP is also responsible for handling **Indirect Buffers (IB)**. + +For reference, internally the CP consists of several sub-blocks (CPC - CP +compute, CPG - CP graphics, and CPF - CP fetcher). Some of these acronyms +appear in register names, but this is more of an implementation detail and not +something that directly impacts driver programming or debugging. Graphics (GFX) and Compute Microcontrollers -------------------------------------------