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SubjectRe: [RFC][PATCH 000 of 3] MD Acceleration and the ADMA interface: Introduction
Pierre Ossman wrote:
> Dan Williams wrote:
>>The ADMA (Asynchronous / Application Specific DMA) interface is proposed
>>as a cross platform mechanism for supporting system CPU offload engines.
>>The goal is to provide a unified asynchronous interface to support
>>memory copies, block xor, block pattern setting, block compare, CRC
>>calculation, cryptography etc. The ADMA interface should support a PIO
>>fallback mode allowing a given ADMA engine implementation to use the
>>system CPU for operations without a hardware accelerated backend. In
>>other words a client coded to the ADMA interface transparently receives
>>hardware acceleration for its operations depending on the features of
>>the underlying platform.
> I'm wondering, how common is this ADMA acronym? I've been writing a MMC

In ATA land, ADMA is a hardware ATA controller interface, similar to
AHCI. We even have a pdc_adma (Pacific Digital ADMA) driver in the
tree, and NVIDIA uses a variant of the ADMA interface in their SATA


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