Commit f9a37be0 authored by Matthew Garrett's avatar Matthew Garrett Committed by Bjorn Helgaas
Browse files

x86: Use PCI setup data 



EFI can provide PCI ROMs out of band via boot services, which may not be
available after boot. Add support for using the data handed off to us by
the boot stub or bootloader.

[bhelgaas: added Seth's boot_params section mismatch fix]
[bhelgaas: drop "boot_params.hdr.version < 0x0209" test]
Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Tested-by: default avatarSeth Forshee <seth.forshee@canonical.com>
parent 84c1b80e

arch/x86/kernel/setup.c

+0 −4
Original line number Diff line number Diff line
@@ -143,11 +143,7 @@ int default_check_phys_apicid_present(int phys_apicid) 
}

#endif



#ifndef CONFIG_DEBUG_BOOT_PARAMS

struct boot_params __initdata boot_params;

#else

struct boot_params boot_params;

#endif



/*

 * Machine setup..

arch/x86/pci/common.c

+30 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <asm/io.h>

#include <asm/smp.h>

#include <asm/pci_x86.h>

#include <asm/setup.h>



unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 |

				PCI_PROBE_MMCONF;
@@ -608,6 +609,35 @@ unsigned int pcibios_assign_all_busses(void) 
	return (pci_probe & PCI_ASSIGN_ALL_BUSSES) ? 1 : 0;

}



int pcibios_add_device(struct pci_dev *dev)

{

	struct setup_data *data;

	struct pci_setup_rom *rom;

	u64 pa_data;



	pa_data = boot_params.hdr.setup_data;

	while (pa_data) {

		data = phys_to_virt(pa_data);



		if (data->type == SETUP_PCI) {

			rom = (struct pci_setup_rom *)data;



			if ((pci_domain_nr(dev->bus) == rom->segment) &&

			    (dev->bus->number == rom->bus) &&

			    (PCI_SLOT(dev->devfn) == rom->device) &&

			    (PCI_FUNC(dev->devfn) == rom->function) &&

			    (dev->vendor == rom->vendor) &&

			    (dev->device == rom->devid)) {

				dev->rom = (void *)(unsigned long)(pa_data +

				      offsetof(struct pci_setup_rom, romdata));

				dev->romlen = rom->pcilen;

			}

		}

		pa_data = data->next;

	}

	return 0;

}



int pcibios_enable_device(struct pci_dev *dev, int mask)

{

	int err;

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