Management of data transaction from I/O devices
Embodiments include a technique for management of data transactions, where the technique includes receiving, at a link interface, a packet from an I/O device, wherein the packet includes address information, and performing, by a host bridge, an address translation for the address information included in the packet. The technique also includes responsive to performing the address translation, determining a target page associated with a translated address of the packet is for at least one of a payload target page or a signaling target page, and appending a flag to a command based at least in part on the target page being associated with the translated address of the packet. The technique includes transmitting the command to an ordering controller for ordering the packet.
1. A computer-implemented method for management of data transactions, the method comprising:
receiving, via a link interface, a packet from an I/O device, wherein the packet includes address information;
performing, via a host bridge, an address translation for the address information included in the packet;
responsive to performing the address translation, determining a target page associated with a translated address of the packet is for at least one of a payload target page or a signaling target page;
appending a flag to a command based at least in part on the target page being associated with the translated address of the packet;
transmitting the command to an ordering controller for ordering the packet;
wherein the packet includes at least one of a signaling or a payload data;
responsive to the flag being set, ignoring an ordering of the payload data when writing the payload data into memory; and
responsive to the flag not being set, pushing out all preceding payload data, regardless of previously received payload data having the flag set.
2. The computer-implemented method of claim 1 , wherein the flag is set based on an ordering hint bit of an address translation table being set by a program.
3. The computer-implemented method of claim 2 , wherein the program is at least one of an operating system O/S, a driver, or an application.
4. The computer-implemented method of claim 1 , wherein the link interface is a peripheral component interconnect PCI-Express link interface, wherein the address information of the packet is a PCI-Express address, and wherein the ordering controller is a PCI-Express bridge controller.
5. The computer-implemented method of claim 4 , wherein the address translation converts the PCI-Express address of the packet to a memory location address of the memory.
6. The computer-implemented method of claim 1 , wherein the command is a direct memory access write command.