Lsi Corporation

Avago Technologies General IP (singapore) Pte. Ltd.

Michael Bratvold

David R Noeldner

Paul H Smith

Described embodiments provide for transferring data from one location to another location in a memory of a media controller. A transmit data path and a receive data path of the media controller are linked with a generic direct memory access (GDMA). The transmit data path includes a transmit (TX) buffer and the receive data path includes a receive (RX) buffer. The GDMA is programmed with a total transfer count and a transfer mode. The GDMA processes the movable data based on the total transfer count and the transfer mode by converting one or more portions of the movable data in the TX buffer into a predefined frame structure defined with status entries, which translates frames of the moveable data between the TX data path and the RX data path and synchronizes the movable data between the TX buffer and the RX buffer with the status entries.

Direct memory access for loopback transfers in a media controller architecture

Described embodiments provide a media controller for servicing contexts corresponding to data transfer requests from host devices. The media controller includes a context generator for generating contexts corresponding to the data transfer requests and a buffer for storing one or more context pointers, each pointer corresponding to a context and an action by a system module associated with the context. A context processor is configured to complete a context when the action by a media controller module associated with the context is complete, remove each pointer from the buffer associated with the completed context, and determine whether an interrupt corresponds to the completed context and removed pointer. If no interrupt corresponds to the completed context, the completed context is cleared. If an interrupt corresponds to the completed context, the interrupt is provided to a master processor and a completed context recycler for recycling the completed context pointer to the context generator.

Interrupt queuing in a media controller architecture

Described embodiments provide a method of transferring data from host devices to a media controller. The media controller generates a transfer context for each write request received from a host device. Receive-data threads corresponding to data transfer contexts for each transfer context are generated, each receive-data thread corresponding to a data transfer between a host device and the media controller. Buffer threads corresponding to data transfer contexts for each transfer context are generated, each buffer thread corresponding to a data transfer between the receive data path and a buffer subsystem. The receive-data and buffer threads are tracked for each transfer context. For each tracked transfer context, data from the receive datapath is iteratively transferred to the buffer subsystem for a previous data transfer context of the buffer thread while data from the host device is transferred to the receive datapath for a subsequent data transfer context of the receive-data thread.

Context processing for multiple active write commands in a media controller architecture

Described embodiments provide a method of allocating resources of a media controller for a data transfer. A data transfer request is received from at least one host device, and includes a host device ID and a data transfer request ID. The media controller generates a Tag ID of the data transfer request based on the host device ID and the data transfer request ID, and generates a starting memory address of a tag table based on the Tag ID of the data transfer request. A tag count value is read from the starting memory address of the tag table. If the tag count value reaches a threshold, an absence of a tag overlap is determined and the Tag ID of the data transfer request is added to the tag table at the starting memory address.

Command tag checking in a multi-initiator media controller architecture

Described embodiments provide a media controller for processing one or more data transfer requests received from at least one host device. The media controller includes a buffer to receive data of a data transfer request from a communication link and a command parser to generate one or more contexts corresponding to the data transfer request. The one or more contexts are stored in the buffer. At least one queue of the media controller includes a regular context queue for queuing regular-priority contexts, and a high-priority context queue for queuing high-priority contexts. A context manager coordinates processing of regular-priority contexts and high-priority contexts of the at least one queue based on context boundaries, wherein, when a context is processed at a context boundary, data corresponding to the processed context is data is transferred between the communication link and at least one of the buffer and the at least one storage media.

Context execution in a media controller architecture

Described embodiments provide for transferring data between a host device and a storage media. A host data transfer request is received and a total size of the data transfer is determined. One or more contexts corresponding to the total size of the requested transfer are generated and are associated with transfers of data. If the data transfer is a write operation, one or more data segments from the host device are transferred into a buffer. The combined size of the data segments corresponds to the total size of the data transfer. In accordance with the contexts, the one or more data segments are transferred from the buffer to the storage media. If the requested data transfer is a read operation, in accordance with the contexts, data from the storage media is retrieved into a buffer and grouped into one or more segments, which are transmitted to the host device.

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Fort Collins, CO, United States of America

Michael Bratvold