[EMAIL PROTECTED] wrote:
In message <[EMAIL PROTECTED]>, Iasen Kostov wrote:I think I was not clear .. .sorry. I ment to lie the driver that some device (that is not realy plugged in the machine) exists. Doing so I can check if drivers _probe() func returns "OK"
Hi,
I want to know is there a way to call *_probe (for device driver) with fake (PCI) device that does not exists in the system ?
First of all a cant find how "struct device" is declared (i've searched even the compile/ dir) and second I think that I'll need to intercept pci_get_vendor and pci_get_device funcs with my own which should detect the fake device and thus will return vandor/device that I need to fake. I realy don't need anything else except _probe ...
I have never tried such but grimpsed the PCI framework, I propose the following, though I don't imagine why you want to do so:
Your driver have to contain DEVICE_IDENTIFY method that calls device_add_child to allocate device_t object.
Then you allocate 'struct pci_devinfo' and initialize pci_devinfo as you like. And you have to make your driver as a module. Then a device object will show up on the device tree on your system.
You may want to have a look at pci_add_children@/sys/dev/pci/pci.c
or not and by checking every device from /usr/share/misc/pci_vendors I could build device<->driver_file database.
I've patched a bit /sys/dev/pci/pci.c like this:
typedef uintptr_t *pci_fake_read_ivars_t(pcicfgregs *cfg); static pci_fake_read_ivars_t *pci_fake_read_ivars = NULL;
int
pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct pci_devinfo *dinfo;
pcicfgregs *cfg = NULL; if(pci_fake_read_ivars && !strcmp("fake0", dev->nameunit)) {
(*pci_fake_read_ivars)(cfg);
} else {
dinfo = device_get_ivars(child);
cfg = &dinfo->cfg;
}And when I load my module it will set pci_fake_read_ivars and will start to test drivers probe sending devices with nameunit set to "fake0" thus telling pci_read_ivar() to fake the return values by calling pci_fake_read_ivars() callback ... I think this is very messy ... I hope that it will work this way :)
regards
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