On Mar 7, 2006, at 8:17 AM, Wyse, Chris wrote: > Hi, > > This code will do the rescan of the PCI that we need for the FPGA. > However, it currently only supports a single execution after the FPGA > gets loaded. Additional calls will continue to add FPGA devices to > the > PCI device list data structure. I'm going to make some changes to > it to > handle multiple calls and to support multiple device ids. I'm > expecting > it to take a day or two, but I'll make an initial cut at it today that > will let us load the Spartan FPGA (only once). This driver will be > loaded when the kernel boots, so I believe that we'll just need to > make > a call into it (we won't have to dynamically load it like the phob > driver).
I'm dealing with this exact same situation and having a discussion on lkml regarding the proper way to do this. In your case, do you care what addresses the FPGA is assigned at? http://marc.theaimsgroup.com/?l=linux-kernel&m=114140791428032&w=2 > Michael, > > For the FPGA loader, you should load the FPGA, then make a call to > pci_rescan_bus0() (I'm renaming check_hw() to pci_rescan_bus0()). > Next, > you need to do a pci_find_device() to detect the newly loaded > FPGA. If > the pci_find_device() fails, assume that the FPGA load has not > completed, so delay for some time frame (100 ms??), then rescan again. > If still not found, rescan up to MAX_PCI_RESCANS (probably set it > to 3) > times, then return an error that the FPGA load failed. Do you not know when the FPGA load is done? I assume its under software control so the "fpga loader" should just call the PCI setup code once it has completed successfully. - kumar
