Method and apparatus for processing dma, and computer-readable storage medium

An apparatus for processing DMA, comprising a memory, used for storing a computer program;

• and
• a processor, used for implementing following operations when executing the computer program;
• receiving a task used for processing DMA, and acquiring state information of the task;
• judging, according to stages contained in the task, whether the state information meets a first preset condition of a descriptor DMA queue and/or a second preset condition of a data DMA queue, wherein the descriptor DMA queue is used for processing a first stage contained in the task, and the data DMA queue is used for processing a second stage contained in the task;
• when the state information meets the first preset condition, controlling the descriptor DMA queue to process the first stage contained in the task;
• and when the state information meets the second preset condition, controlling the data DMA queue to process the second stage contained in the task;
• and
• after the processing of the first stage or the second stage is completed, updating the state information of the task;
• and the flow returns to the operation of receiving the task used for processing DMA and acquiring the state information of the task by taking, as a new task, the task of the stage corresponding to the state information that does not meet the first preset condition or the second preset condition;
• wherein the first preset condition is that a descriptor cache contains a next-page address entry, the priority of the task is the highest in the descriptor DMA queue, and a bandwidth quota and a flow control quota are not equal to 0;
• and
• the second preset condition is that data DMA contains descriptor information, the priority of the task is the highest in the data DMA queue, and the bandwidth quota and the flow control quota are not equal to 0.

A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program causes the processor to implement following operations;

• receiving a task used for processing DMA, and acquiring state information of the task;
• judging, according to stages contained in the task, whether the state information meets a first preset condition of a descriptor DMA queue and/or a second preset condition of a data DMA queue, wherein the descriptor DMA queue is used for processing a first stage contained in the task, and the data DMA queue is used for processing a second stage contained in the task;
• when the state information meets the first preset condition, controlling the descriptor DMA queue to process the first stage contained in the task;
• and when the state information meets the second preset condition, controlling the data DMA queue to process the second stage contained in the task;
• and
• after the processing of the first stage or the second stage is completed, updating the state information of the task;
• and the flow returns to the operation of receiving the task used for processing DMA and acquiring the state information of the task by taking, as a new task, the task of the stage corresponding to the state information that does not meet the first preset condition or the second preset condition;
• wherein the first preset condition is that a descriptor cache contains a next-page address entry, the priority of the task is the highest in the descriptor DMA queue, and a bandwidth quota and a flow control quota are not equal to 0;
• and
• the second preset condition is that data DMA contains descriptor information, the priority of the task is the highest in the data DMA queue, and the bandwidth quota and the flow control quota are not equal to 0.