On Thu, Oct 28, 2010 at 11:15 PM, Alison Chaiken <alchaiken@xxxxxxxxx> wrote: > Vikas writes: >> 1) “ pci_host1_shell# ./custom_command ifconfig eth0 192.168.x.y” >> configures IP on PCIe card > > I don't understand why you'd want to configure IP on a PCIe card. > Are you going to use a netlink socket to communicate with the card > from userspace? But then you don't need a four-dot address. > > The PCIe driver I've been trying to port creates a /dev file. The > card puts data intended for userspace in the /dev file via DMA and > notifies the kernel via an interrupt. The interrupt handler informs > userspace that data is ready and the user process then uses a read on > the /dev file descriptor to access it. As far as I understand it, > the procedure this driver is using is a relatively standard one. > > I guess that your driver is for a network card, Vikas? But even so, > you don't want to associate a four-dot address with the card itself > but with a socket associated with it. The explanation of how to > perform this sequence of tasks from user space in the Matthew and > Stones book that Anuz Pratap Singh Tomar recommended is quite > instructive in this regard. > > -- > Alison Chaiken > (650) 279-5600 (cell) > http://www.exerciseforthereader.org/ > Standards should be recorded after they've emerged. -- Jeff Lindsay > Alison The PCIe card runs linux OS and is used for network/security/storage applications to offload computation from PCI host. I am trying to have a tool on PCI host which can launch any userspace linux-administration commands on the PCIe card's linux. IP address configuration was one example. I am exploring possibility of developing a general interface, where linux on PCIe card : 1) Receives "commands arg1 arg2 arg3 ....." from PCIe host. I already have mechanism to send all this FROM PCI host. 2) Executes the user pace command. "call_usermodehelper ??" 3) Capture the results of command execution and return back the results/errors. Can "call_usermodehelper" do this ? 4) Returns the execution result and errors back to PCI host. I already have in-kernel mechanism to send all this TO PCI host. thanks vikas -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
