2 * This is splited from hw/i386/kvm/pci-assign.c
4 #include "qemu/osdep.h"
5 #include "qapi/error.h"
6 #include "qemu/error-report.h"
8 #include "hw/pci/pci.h"
12 * Scan the assigned devices for the devices that have an option ROM, and then
13 * load the corresponding ROM data to RAM. If an error occurs while loading an
14 * option ROM, we just ignore that option ROM and continue with the next one.
16 void *pci_assign_dev_load_option_rom(PCIDevice
*dev
,
17 int *size
, unsigned int domain
,
18 unsigned int bus
, unsigned int slot
,
19 unsigned int function
)
21 char name
[32], rom_file
[64];
26 Object
*owner
= OBJECT(dev
);
28 /* If loading ROM from file, pci handles it */
29 if (dev
->romfile
|| !dev
->rom_bar
) {
33 snprintf(rom_file
, sizeof(rom_file
),
34 "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/rom",
35 domain
, bus
, slot
, function
);
37 /* Write "1" to the ROM file to enable it */
38 fp
= fopen(rom_file
, "r+");
40 if (errno
!= ENOENT
) {
41 error_report("pci-assign: Cannot open %s: %s", rom_file
, strerror(errno
));
45 if (fstat(fileno(fp
), &st
) == -1) {
46 error_report("pci-assign: Cannot stat %s: %s", rom_file
, strerror(errno
));
51 if (fwrite(&val
, 1, 1, fp
) != 1) {
54 fseek(fp
, 0, SEEK_SET
);
56 snprintf(name
, sizeof(name
), "%s.rom", object_get_typename(owner
));
57 memory_region_init_ram(&dev
->rom
, owner
, name
, st
.st_size
, &error_abort
);
58 ptr
= memory_region_get_ram_ptr(&dev
->rom
);
59 memset(ptr
, 0xff, st
.st_size
);
61 if (!fread(ptr
, 1, st
.st_size
, fp
)) {
62 error_report("pci-assign: Cannot read from host %s", rom_file
);
63 error_printf("Device option ROM contents are probably invalid "
64 "(check dmesg).\nSkip option ROM probe with rombar=0, "
65 "or load from file with romfile=\n");
69 pci_register_bar(dev
, PCI_ROM_SLOT
, 0, &dev
->rom
);
73 /* Write "0" to disable ROM */
74 fseek(fp
, 0, SEEK_SET
);
76 if (!fwrite(&val
, 1, 1, fp
)) {
77 XEN_PT_WARN(dev
, "%s\n", "Failed to disable pci-sysfs rom file");