---------- Forwarded message ---------- From: Peter Teoh <htmldeveloper@xxxxxxxxx> Date: Mon, Jan 5, 2009 at 12:00 PM Subject: Re: PCI communication between host and target. To: arun c <arun.edarath@xxxxxxxxx> thank you ... at the moment quite busy....offhand got no answer....can u forward to kernelnewbies? many experts are there to help u.... On Mon, Jan 5, 2009 at 2:08 AM, arun c <arun.edarath@xxxxxxxxx> wrote: > Hi, > > On Sun, Jan 4, 2009 at 4:54 PM, Peter Teoh <htmldeveloper@xxxxxxxxx> wrote: >> this is interesting.....can tell me what is it that u are looking for? >> u did not ask any specific question....which made answering/searching >> for answer much easier. >> > > Ok I will try to make things more clear. > > I have a host PC running linux. The custom board(target) of mine is > running u-boot will sit on the > PCI slot of the host PC. > > > The target board has its on processor and u-boot ported on to that. As > the target board is > having a good SOC I can offload some of the processing made on the host to it. > > Assume on the target board i have an application which can do > > 1) A self test of all the peripherals of it. > 2) Video processing. > 3) Image processing. > > So from my host I should do > > 1) open /dev/pci_custom_target > 2)ioctl (fd, DO_SELFTEST) or ioctl (fd, DO_VIDEO_PROCESS,&buf) or > ioctl (fd, DO_IMAGE_PROCESS, &buf) > > I need a mechanism to transfer all these commands through PCI to target. > > target takes this commands and executes and give the response back to host. > > I hope the situation is more clear now. > > Arun C > > > > >> On Fri, Jan 2, 2009 at 5:39 PM, arun c <arun.edarath@xxxxxxxxx> wrote: >>> Hi all, >>> >>> In my custom board design the communication between host and target >>> should happen through PCI interface. >>> >>> The target processor runs u-boot, and host processor is running linux. >>> >>> The target devices will be accessed from the host by /dev nodes. >>> >>> To reduce the workload on host all the target calls like >>> open, read ,write ,ioctl are passed directly to the target. >>> >>> There will be a common PCI buffer between host >>> and target and target will take commands from this buffer >>> and execute. The result of executed API also will be put to a shared buffer >>> between host and target. [This is what i am planning to implement] >>> >>> Anybody has come across similar sort of scenario? >>> Any ideas or any pointers will be highly appreciated. >>> >> >> -- >> Regards, >> Peter Teoh >> > -- Regards, Peter Teoh -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
