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Commit | Line | Data |
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bcd7461e TC |
1 | /* |
2 | * This is splited from hw/i386/kvm/pci-assign.c | |
3 | */ | |
b6a0aa05 | 4 | #include "qemu/osdep.h" |
da34e65c | 5 | #include "qapi/error.h" |
bcd7461e | 6 | #include "qemu/error-report.h" |
bcd7461e | 7 | #include "hw/loader.h" |
bcd7461e | 8 | #include "hw/pci/pci.h" |
ab37bfc7 | 9 | #include "xen_pt.h" |
bcd7461e TC |
10 | |
11 | /* | |
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. | |
15 | */ | |
6dad8260 | 16 | void *pci_assign_dev_load_option_rom(PCIDevice *dev, |
bcd7461e TC |
17 | int *size, unsigned int domain, |
18 | unsigned int bus, unsigned int slot, | |
19 | unsigned int function) | |
20 | { | |
21 | char name[32], rom_file[64]; | |
22 | FILE *fp; | |
23 | uint8_t val; | |
24 | struct stat st; | |
25 | void *ptr = NULL; | |
6dad8260 | 26 | Object *owner = OBJECT(dev); |
bcd7461e TC |
27 | |
28 | /* If loading ROM from file, pci handles it */ | |
29 | if (dev->romfile || !dev->rom_bar) { | |
30 | return NULL; | |
31 | } | |
32 | ||
33 | snprintf(rom_file, sizeof(rom_file), | |
34 | "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/rom", | |
35 | domain, bus, slot, function); | |
36 | ||
bcd7461e TC |
37 | /* Write "1" to the ROM file to enable it */ |
38 | fp = fopen(rom_file, "r+"); | |
39 | if (fp == NULL) { | |
9ed26903 PB |
40 | if (errno != ENOENT) { |
41 | error_report("pci-assign: Cannot open %s: %s", rom_file, strerror(errno)); | |
42 | } | |
bcd7461e TC |
43 | return NULL; |
44 | } | |
9ed26903 PB |
45 | if (fstat(fileno(fp), &st) == -1) { |
46 | error_report("pci-assign: Cannot stat %s: %s", rom_file, strerror(errno)); | |
47 | goto close_rom; | |
48 | } | |
49 | ||
bcd7461e TC |
50 | val = 1; |
51 | if (fwrite(&val, 1, 1, fp) != 1) { | |
52 | goto close_rom; | |
53 | } | |
54 | fseek(fp, 0, SEEK_SET); | |
55 | ||
56 | snprintf(name, sizeof(name), "%s.rom", object_get_typename(owner)); | |
6dad8260 | 57 | memory_region_init_ram(&dev->rom, owner, name, st.st_size, &error_abort); |
bcd7461e TC |
58 | ptr = memory_region_get_ram_ptr(&dev->rom); |
59 | memset(ptr, 0xff, st.st_size); | |
60 | ||
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"); | |
66 | goto close_rom; | |
67 | } | |
68 | ||
69 | pci_register_bar(dev, PCI_ROM_SLOT, 0, &dev->rom); | |
70 | dev->has_rom = true; | |
71 | *size = st.st_size; | |
72 | close_rom: | |
73 | /* Write "0" to disable ROM */ | |
74 | fseek(fp, 0, SEEK_SET); | |
75 | val = 0; | |
76 | if (!fwrite(&val, 1, 1, fp)) { | |
ab37bfc7 | 77 | XEN_PT_WARN(dev, "%s\n", "Failed to disable pci-sysfs rom file"); |
bcd7461e TC |
78 | } |
79 | fclose(fp); | |
80 | ||
81 | return ptr; | |
82 | } |