摘要:
Provided are techniques for writing doorbell information. In accordance with certain techniques, one or more protection domains are created. One or more data structures are created, wherein each of the data structures is associated with at least one protection domain. One of the data structures is updated. A doorbell structure address for a doorbell structure associated with the updated data structure is computed. Doorbell information is written at the computed doorbell structure address. In accordance with certain other techniques, doorbell information is received. A doorbell structure address is decoded from the doorbell information. A first protection domain identifier is determined from the doorbell structure address. A resource context of a data structure is determined from the doorbell information. The resource context at the doorbell address is read to determine a second protection domain identifier. The first protection domain identifier and the second protection domain identifier are compared to determine whether to update the resource context of the doorbell structure. Other embodiments are described and claimed.
摘要:
Provided are a method, system, and program for translating virtual addresses of memory locations within pages of different sizes. In one embodiment, a translation entry containing a physical address is stored in a data structure table for each page. Each virtual address includes a page virtual address which identifies the translation entry containing the physical address of the page containing the memory location. The virtual address may be translated to a translation entry index using the size of the page containing the memory location.
摘要:
Provided are a method, system, and program for updating a cache in which, in one aspect of the description provided herein, changes to data structure entries in the cache are selectively written back to the source data structure table maintained in the host memory. In one embodiment, translation and protection table (TPT) contents of an identified cache entry are written to a source TPT in host memory as a function of an identified state transition of the cache entry in connection with a memory operation and the memory operation. Other embodiments are described and claimed.
摘要:
In one embodiment, a method is provided. The method of this embodiment provides determining if a management queue can be created, and if a management queue can be created, allocating virtually contiguous memory to a management queue associated with a device, registering the management queue, and creating a management queue context.
摘要:
Provided are a method, system, and program for caching a virtualized data structure table. In one embodiment, an input/output (I/O) device has a cache subsystem for a data structure table which has been virtualized. As a consequence, the data structure table cache may be addressed using a virtual address or index. For example, a network adapter may maintain an address translation and protection table (TPT) which has virtually contiguous data structures but not necessarily physically contiguous data structures in system memory. TPT entries may be stored in a cache and addressed using a virtual address or index. Mapping tables may be stored in the cache as well and addressed using a virtual address or index.
摘要:
Provided are a method, system, and program for managing data transmission from a source to a destination through a network. The destination imposes a window value on the source which limits the quantity of data packets which can be sent from the source to the destination without receiving an acknowledgment of being received by the destination. In one embodiment, the source imposes a second window value, smaller than the destination window value, which limits even further the quantity of data packets which can be sent from the source to the destination without receiving an acknowledgment of being received by the destination. In another embodiment, a plurality of direct memory access connections are established between the source and a plurality of specified memory locations of a plurality of destinations. The source imposes a plurality of message limits, each message limit imposing a separate limit for each direct memory access connection on the quantity of messages sent from the source to the specified memory location of the direct memory access connection associated with the message limit and lacking a message acknowledgment of being received by the destination of the direct memory access connection associated with the message limit.
摘要:
According to one embodiment, an apparatus is disclosed. The apparatus includes a port having a plurality of lanes, a plurality of protocol engines. Each protocol engine is associated with one of the plurality of lanes, and processes tasks to be forwarded to a plurality of remote nodes. The apparatus also includes a first port task scheduler (PTS) to manage the tasks to be forwarded to the one or more of the plurality of protocol engines. The first PTS includes a register to indicate which of the plurality of protocol engines the first PTS is to support.
摘要:
Provided are a method, system, and program for managing memory options for a device such as an I/O device. Private addresses provided by logic blocks within the device may be transparently routed to either an optional external memory or to system memory, depending upon which of the optional memories the private address has been mapped.
摘要:
An apparatus according to one embodiment may include an integrated circuit. The integrated circuit may include a plurality communication channels. The integrated circuit may be is capable of communicating with at least one remote node external to the integrated circuit, via at least one of the communication channels, in accordance with at least one communication protocol. Each of said plurality of communication channels may provide a communication path between a host system and at least one remote node. The integrated circuit may be further capable of operating each communication channel independently of each other and independently of the host system. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.
摘要:
A method and system for transmitting packets. Packets may be transmitted when a protocol control block is copied from a host processing system to a network protocol offload engine. Message information that contains packet payload addresses may be provided to the network protocol offload engine to generate a plurality of message contexts in the offload engine. With the message contexts, protocol processing may be performed at the offload engine while leaving the packet payload in the host memory. Thus, packet payloads may be transmitted directly from the host memory to a network communication link during transmission of the packets by the offload engine. Other embodiments are also described.