Unified DMA
    1.
    发明申请
    Unified DMA 有权
    统一DMA

    公开(公告)号:US20120233360A1

    公开(公告)日:2012-09-13

    申请号:US13474373

    申请日:2012-05-17

    IPC分类号: G06F13/28

    CPC分类号: G06F13/28

    摘要: In one embodiment, an apparatus comprises a first interface circuit, a direct memory access (DMA) controller coupled to the first interface circuit, and a host coupled to the DMA controller. The first interface circuit is configured to communicate on an interface according to a protocol. The host comprises at least one address space mapped, at least in part, to a plurality of memory locations in a memory system of the host. The DMA controller is configured to perform DMA transfers between the first interface circuit and the address space, and the DMA controller is further configured to perform DMA transfers between a first plurality of the plurality of memory locations and a second plurality of the plurality of memory locations.

    摘要翻译: 在一个实施例中,装置包括耦合到第一接口电路的第一接口电路,直接存储器访问(DMA)控制器和耦合到DMA控制器的主机。 第一接口电路被配置为根据协议在接口上进行通信。 主机包括至少部分地映射到主机的存储器系统中的多个存储器位置的至少一个地址空间。 DMA控制器被配置为在第一接口电路和地址空间之间执行DMA传输,并且DMA控制器还被配置为在第一多个多个存储器位置和第二多个多个存储器位置之间执行DMA传输 。

    Method and apparatus for generating secure DAM transfers
    2.
    发明授权
    Method and apparatus for generating secure DAM transfers 有权
    用于生成安全DAM传输的方法和装置

    公开(公告)号:US08028103B2

    公开(公告)日:2011-09-27

    申请号:US12564610

    申请日:2009-09-22

    IPC分类号: G06F3/00 G06F13/28

    CPC分类号: G06F13/28

    摘要: In one embodiment, a direct memory access (DMA) controller comprises a transmit control circuit, an offload engine, and a receive control circuit. The transmit control circuit is configured to read first DMA data from an address space in a host. Coupled to receive the first DMA data from the transmit control circuit, the offload engine is configured to perform at least a first operation on the first DMA data to produce a result. The offload engine is configured to at least start performing the first operation during a DMA transfer that provides the first DMA data to the offload engine. Coupled to the offload engine to receive the result, the receive control circuit is configured to write the result to the address space in the host according to a DMA descriptor data structure that describes the DMA transfer.

    摘要翻译: 在一个实施例中,直接存储器访问(DMA)控制器包括发射控制电路,卸载引擎和接收控制电路。 发送控制电路被配置为从主机中的地址空间读取第一DMA数据。 耦合以从发送控制电路接收第一DMA数据,卸载引擎被配置为对第一DMA数据执行至少第一操作以产生结果。 卸载引擎被配置为在向卸载引擎提供第一DMA数据的DMA传送期间至少开始执行第一操作。 耦合到卸载引擎以接收结果,接收控制电路被配置为根据描述DMA传输的DMA描述符数据结构将结果写入主机中的地址空间。

    Network direct memory access
    3.
    发明授权
    Network direct memory access 有权
    网络直接内存访问

    公开(公告)号:US07836220B2

    公开(公告)日:2010-11-16

    申请号:US11505736

    申请日:2006-08-17

    摘要: In one embodiment, a system comprises at least a first node and a second node coupled to a network. The second node comprises a local memory and a direct memory access (DMA) controller coupled to the local memory. The first node is configured to transmit at least a first packet to the second node to access data in the local memory and at least one other packet that is not coded to access the local memory. The second node is configured to capture the packet from a data link layer of a protocol stack, and wherein the DMA controller is configured to perform one more transfers with the local memory to access the data specified by the first packet responsive to the first packet received from the data link layer. The second node is configured to process the other packet to a top of the protocol stack.

    摘要翻译: 在一个实施例中,系统包括耦合到网络的至少第一节点和第二节点。 第二节点包括本地存储器和耦合到本地存储器的直接存储器访问(DMA)控制器。 第一节点被配置为将至少第一分组发送到第二节点以访问本地存储器中的数据和至少一个未被编码以访问本地存储器的其他分组。 第二节点被配置为从协议栈的数据链路层捕获分组,并且其中DMA控制器被配置为执行与本地存储器的一次或多次传输,以响应于第一分组访问由第一分组指定的数据 从数据链路层接收。 第二个节点被配置为将另一个分组处理到协议栈的顶部。

    DMA controller configured to process control descriptors and transfer descriptors
    4.
    发明授权
    DMA controller configured to process control descriptors and transfer descriptors 有权
    DMA控制器配置为处理控制描述符和传输描述符

    公开(公告)号:US07680963B2

    公开(公告)日:2010-03-16

    申请号:US11682065

    申请日:2007-03-05

    IPC分类号: G06F3/00 G06F13/28

    CPC分类号: G06F13/28

    摘要: In one embodiment, an apparatus comprises a first interface circuit, a direct memory access (DMA) controller coupled to the first interface circuit, and a host coupled to the DMA controller. The first interface circuit is configured to communicate on an interface according to a protocol. The host comprises at least one address space mapped, at least in part, to a plurality of memory locations in a memory system of the host. The DMA controller is configured to perform DMA transfers between the first interface circuit and the address space, and the DMA controller is further configured to perform DMA transfers between a first plurality of the plurality of memory locations and a second plurality of the plurality of memory locations.

    摘要翻译: 在一个实施例中,装置包括耦合到第一接口电路的第一接口电路,直接存储器访问(DMA)控制器和耦合到DMA控制器的主机。 第一接口电路被配置为根据协议在接口上进行通信。 主机包括至少部分地映射到主机的存储器系统中的多个存储器位置的至少一个地址空间。 DMA控制器被配置为在第一接口电路和地址空间之间执行DMA传输,并且DMA控制器还被配置为在第一多个多个存储器位置和第二多个多个存储器位置之间执行DMA传输 。

    System on a chip for caching of data packets based on a cache miss/hit and a state of a control signal
    5.
    发明授权
    System on a chip for caching of data packets based on a cache miss/hit and a state of a control signal 有权
    基于高速缓存未命中/缓存和控制信号的状态来缓存数据分组的芯片上的系统

    公开(公告)号:US07320022B2

    公开(公告)日:2008-01-15

    申请号:US10202753

    申请日:2002-07-25

    IPC分类号: G06F13/00

    摘要: A packet processing system may include a processor, a cache, a memory controller, and at least one packet interface circuit integrated into a single integrated circuit. In one embodiment (which may be used in integrated or non-integrated systems), the packet interface circuit is configured to cause allocation in the cache of a portion of a received packet. In one embodiment (which may be used in integrated or non-integrated systems), the memory controller may be configured to selectively block memory transactions. Particularly, the memory controller may implement at least two block signals, one for the packet interface circuit and one for other devices. The block signals may be used to control the initiation of memory transactions when the memory controller's input queue is approaching fullness.

    摘要翻译: 分组处理系统可以包括集成到单个集成电路中的处理器,高速缓存,存储器控制器和至少一个分组接口电路。 在一个实施例中(其可以在集成或非集成系统中使用),分组接口电路被配置为在接收到的分组的一部分的高速缓存中引起分配。 在一个实施例中(其可以在集成或非集成系统中使用),存储器控制器可以被配置为选择性地阻止存储器事务。 特别地,存储器控制器可以实现至少两个块信号,一个用于分组接口电路,一个用于其他设备。 当存储器控制器的输入队列逼近时,块信号可用于控制存储器事务的启动。

    Adaptive retry mechanism
    6.
    发明授权
    Adaptive retry mechanism 有权
    自适应重试机制

    公开(公告)号:US06851004B2

    公开(公告)日:2005-02-01

    申请号:US10629097

    申请日:2003-07-29

    CPC分类号: G06F13/161

    摘要: An adaptive retry mechanism may record latencies of recent transactions (e.g. the first data transfer latency), and may select a retry latency from two or more retry latencies. The retry latency may be used for a transaction, and may specify a point in time during the transaction at which the transaction is retried if the first data transfer has not yet occurred. In one implementation, the set of retry latencies includes a minimum retry latency, a nominal retry latency, and a maximum retry latency. The nominal retry latency may be set slightly greater than the expected latency of transactions in the system. The minimum retry latency may be less than the nominal retry latency and the maximum retry latency may be greater than the nominal retry latency. If latencies greater than the nominal retry latency but less than the maximum retry latency are being experienced, the maximum retry latency may be selected. On the other hand, if latencies greater than the maximum retry latency are being experienced, the minimum retry latency may be selected.

    摘要翻译: 自适应重试机制可以记录近期事务的延迟(例如,第一数据传输等待时间),并且可以从两个或更多个重试延迟中选择重试延迟。 重试延迟可以用于事务,并且可以在事务中指定在第一数据传送尚未发生的情况下重试事务的时间点。 在一个实现中,该重试延迟集合包括最小重试延迟,标称重试延迟和最大重试延迟。 标称重试延迟可以被设置为略大于系统中事务的预期等待时间。 最小重试延迟可能小于标称重试延迟,并且最大重试延迟可能大于标称重试延迟。 如果正在经历大于标称重试延迟但小于最大重试延迟的延迟,则可以选择最大重试延迟。 另一方面,如果正在经历大于最大重试延迟的延迟,则可以选择最小重试延迟。

    Data transformation during direct memory access
    7.
    发明授权
    Data transformation during direct memory access 有权
    直接内存访问期间的数据转换

    公开(公告)号:US08566485B2

    公开(公告)日:2013-10-22

    申请号:US13566485

    申请日:2012-08-03

    IPC分类号: G06F13/28

    CPC分类号: G06F13/28

    摘要: In one embodiment, an apparatus comprises a first interface circuit, a direct memory access (DMA) controller coupled to the first interface circuit, and a host coupled to the DMA controller. The first interface circuit is configured to communicate on an interface according to a protocol. The host comprises at least one address space mapped, at least in part, to a plurality of memory locations in a memory system of the host. The DMA controller is configured to perform DMA transfers between the first interface circuit and the address space, and the DMA controller is further configured to perform DMA transfers between a first plurality of the plurality of memory locations and a second plurality of the plurality of memory locations.

    摘要翻译: 在一个实施例中,装置包括耦合到第一接口电路的第一接口电路,直接存储器访问(DMA)控制器和耦合到DMA控制器的主机。 第一接口电路被配置为根据协议在接口上进行通信。 主机包括至少部分地映射到主机的存储器系统中的多个存储器位置的至少一个地址空间。 DMA控制器被配置为在第一接口电路和地址空间之间执行DMA传输,并且DMA控制器还被配置为在第一多个多个存储器位置和第二多个多个存储器位置之间执行DMA传输 。

    Atomic interrupt masking in an interrupt controller to prevent delivery of same interrupt vector for consecutive interrupt acknowledgements
    8.
    发明授权
    Atomic interrupt masking in an interrupt controller to prevent delivery of same interrupt vector for consecutive interrupt acknowledgements 有权
    中断控制器中的原子中断屏蔽,以防止传递相同的中断向量用于连续的中断确认

    公开(公告)号:US08458386B2

    公开(公告)日:2013-06-04

    申请号:US12962089

    申请日:2010-12-07

    IPC分类号: G06F13/24

    CPC分类号: G06F13/24 G06F9/4812 G06F9/52

    摘要: In one embodiment, an interrupt controller may implement an interrupt distribution scheme for distributing interrupts among multiple processors. The scheme may take into account various processor state in determining which processor should receive a given interrupt. For example, the processor state may include whether or not the processor is in a sleep state, whether or not interrupts are enabled, whether or not the processor has responded to previous interrupts, etc. The interrupt controller may implement timeout mechanisms to detect that an interrupt is being delayed (e.g. after being offered to a processor). The interrupt may be re-evaluated at the expiration of a timeout, and potentially offered to another processor. The interrupt controller may be configured to automatically, and atomically, mask an interrupt in response to delivering an interrupt vector for the interrupt to a responding processor.

    摘要翻译: 在一个实施例中,中断控制器可以实现用于在多个处理器之间分配中断的中断分配方案。 该方案可以考虑在确定哪个处理器应该接收给定中断时的各种处理器状态。 例如,处理器状态可以包括处理器是否处于休眠状态,中断是否被使能,处理器是否响应先前的中断等。中断控制器可以实现超时机制以检测到 中断被延迟(例如,在提供给处理器之后)。 中断可能会在超时到期时重新评估,并可能提供给另一个处理器。 中断控制器可以被配置为自动并原子地屏蔽中断,以响应于将中断的中断向量传递给响应处理器。

    Data Flow Control Within and Between DMA Channels
    9.
    发明申请
    Data Flow Control Within and Between DMA Channels 有权
    DMA通道内和之间的数据流控制

    公开(公告)号:US20120297096A1

    公开(公告)日:2012-11-22

    申请号:US13563127

    申请日:2012-07-31

    IPC分类号: G06F13/28

    CPC分类号: G06F13/28

    摘要: In one embodiment, a direct memory access (DMA) controller comprises a transmit circuit and a data flow control circuit coupled to the transmit circuit. The transmit circuit is configured to perform DMA transfers, each DMA transfer described by a DMA descriptor stored in a data structure in memory. There is a data structure for each DMA channel that is in use. The data flow control circuit is configured to control the transmit circuit's processing of DMA descriptors for each DMA channel responsive to data flow control data in the DMA descriptors in the corresponding data structure.

    摘要翻译: 在一个实施例中,直接存储器访问(DMA)控制器包括耦合到发射电路的发射电路和数据流控制电路。 发送电路被配置为执行DMA传输,每个DMA传输由存储在存储器中的数据结构中的DMA描述符描述。 每个正在使用的DMA通道都有一个数据结构。 数据流控制电路被配置为响应于对应数据结构中的DMA描述符中的数据流控制数据来控制发送电路对每个DMA通道的DMA描述符的处理。

    Data flow control within and between DMA channels
    10.
    发明授权
    Data flow control within and between DMA channels 有权
    DMA通道内和之间的数据流控制

    公开(公告)号:US08266338B2

    公开(公告)日:2012-09-11

    申请号:US13276537

    申请日:2011-10-19

    IPC分类号: G06F13/28

    CPC分类号: G06F13/28

    摘要: In one embodiment, a direct memory access (DMA) controller comprises a transmit circuit and a data flow control circuit coupled to the transmit circuit. The transmit circuit is configured to perform DMA transfers, each DMA transfer described by a DMA descriptor stored in a data structure in memory. There is a data structure for each DMA channel that is in use. The data flow control circuit is configured to control the transmit circuit's processing of DMA descriptors for each DMA channel responsive to data flow control data in the DMA descriptors in the corresponding data structure.

    摘要翻译: 在一个实施例中,直接存储器访问(DMA)控制器包括耦合到发射电路的发射电路和数据流控制电路。 发送电路被配置为执行DMA传输,每个DMA传输由存储在存储器中的数据结构中的DMA描述符描述。 每个正在使用的DMA通道都有一个数据结构。 数据流控制电路被配置为响应于对应数据结构中的DMA描述符中的数据流控制数据来控制发送电路对每个DMA通道的DMA描述符的处理。