can't detect IDE controller

[drnono]

Hi,
I'm trying to detect ide drives, but in bochs and vmware they won't show up - I think there must be something wrong with my code but I don't know what. The first dword or 32 bits of information show some sensible deviceID, vendorID, so I suspect that I'm not reading the other dwords properly from the configuration space.

Code: Select all

uint8_t j=0;
uint16_t bus;
uint8_t device;
for (bus=0;bus<256;bus++)
{
	for (device=0; device<32; device++)
	{
		address = (uint32_t) ( (1<<31) | (bus<<16) | (device<<11) | (0<<8) | 0x0  );
		outl(PCI_CONFIG_ADDRESS,address);
		tmp = inl(PCI_CONFIG_DATA);
		ptr=&tmp;
//		if ( tmp>>16 != 0xffff )
		if ( (tmp & 0xffff) != 0xffff )
		{
			 print_byte(bus,25,0,4+j); 
			 print_byte(device,25,3,4+j); 
			print_dword(ptr,25,6,4+j);	// vendor, device

		address = (uint32_t) ( (1<<31) | (bus<<16) | (device<<11) | (0<<8) | 0x8  );
		outl(PCI_CONFIG_ADDRESS,address);
		tmp = inl(PCI_CONFIG_DATA);
		ptr=&tmp;
		print_dword(ptr,25,15,4+j);	// class,subclass


		address = (uint32_t) ( (1<<31) | (bus<<16) | (device<<11) | (0<<8) | 0x10  );
		outl(PCI_CONFIG_ADDRESS,address);
		tmp = inl(PCI_CONFIG_DATA);
		ptr=&tmp;
		print_dword(ptr,25,24,4+j);     // bar0

	 j++;
		}
	}

}

[Octocontrabass]

You're not handling multi-function devices at all, so you won't see any devices with a non-zero function number.

Is your virtual machine configured to use an IDE controller at all? I see bus 00 device 10 is a SCSI controller (class 01 subclass 00) and claims to be one of several LSI Logic Ultra320 SCSI controllers (vendor 1000 device 0030).

[Combuster]

Additionally, in the case of Bochs I would not be surprised if your configuration is set to behave as an ISA IDE controller - i.e. an older machine where it exists but does not yet show up as a PCI device.