diff options
author | Tiejun Chen <tiejun.chen@intel.com> | 2015-07-15 13:37:44 +0800 |
---|---|---|
committer | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2015-09-10 12:04:27 +0000 |
commit | bcd7461e7e84a65f1dfaa6af6e00aa498978d29d (patch) | |
tree | c2d7256b53a3c303ca02a65e72d758a3650222b5 /hw/i386/pci-assign-load-rom.c | |
parent | 595a4f07d6bd18ba11c78b95d6a78089fee26eca (diff) | |
download | qemu-bcd7461e7e84a65f1dfaa6af6e00aa498978d29d.zip |
hw/pci-assign: split pci-assign.c
We will try to reuse assign_dev_load_option_rom in xen side, and
especially its a good beginning to unify pci assign codes both on
kvm and xen in the future.
[Fix build for Windows]
Signed-off-by: Tiejun Chen <tiejun.chen@intel.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/i386/pci-assign-load-rom.c')
-rw-r--r-- | hw/i386/pci-assign-load-rom.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/hw/i386/pci-assign-load-rom.c b/hw/i386/pci-assign-load-rom.c new file mode 100644 index 0000000000..34a3a7ed7f --- /dev/null +++ b/hw/i386/pci-assign-load-rom.c @@ -0,0 +1,91 @@ +/* + * This is splited from hw/i386/kvm/pci-assign.c + */ +#include <stdio.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/stat.h> +#include "hw/hw.h" +#include "hw/i386/pc.h" +#include "qemu/error-report.h" +#include "ui/console.h" +#include "hw/loader.h" +#include "monitor/monitor.h" +#include "qemu/range.h" +#include "sysemu/sysemu.h" +#include "hw/pci/pci.h" +#include "hw/pci/pci-assign.h" + +/* + * Scan the assigned devices for the devices that have an option ROM, and then + * load the corresponding ROM data to RAM. If an error occurs while loading an + * option ROM, we just ignore that option ROM and continue with the next one. + */ +void *pci_assign_dev_load_option_rom(PCIDevice *dev, struct Object *owner, + int *size, unsigned int domain, + unsigned int bus, unsigned int slot, + unsigned int function) +{ + char name[32], rom_file[64]; + FILE *fp; + uint8_t val; + struct stat st; + void *ptr = NULL; + + /* If loading ROM from file, pci handles it */ + if (dev->romfile || !dev->rom_bar) { + return NULL; + } + + snprintf(rom_file, sizeof(rom_file), + "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/rom", + domain, bus, slot, function); + + if (stat(rom_file, &st)) { + return NULL; + } + + if (access(rom_file, F_OK)) { + error_report("pci-assign: Insufficient privileges for %s", rom_file); + return NULL; + } + + /* Write "1" to the ROM file to enable it */ + fp = fopen(rom_file, "r+"); + if (fp == NULL) { + return NULL; + } + val = 1; + if (fwrite(&val, 1, 1, fp) != 1) { + goto close_rom; + } + fseek(fp, 0, SEEK_SET); + + snprintf(name, sizeof(name), "%s.rom", object_get_typename(owner)); + memory_region_init_ram(&dev->rom, owner, name, st.st_size, &error_abort); + vmstate_register_ram(&dev->rom, &dev->qdev); + ptr = memory_region_get_ram_ptr(&dev->rom); + memset(ptr, 0xff, st.st_size); + + if (!fread(ptr, 1, st.st_size, fp)) { + error_report("pci-assign: Cannot read from host %s", rom_file); + error_printf("Device option ROM contents are probably invalid " + "(check dmesg).\nSkip option ROM probe with rombar=0, " + "or load from file with romfile=\n"); + goto close_rom; + } + + pci_register_bar(dev, PCI_ROM_SLOT, 0, &dev->rom); + dev->has_rom = true; + *size = st.st_size; +close_rom: + /* Write "0" to disable ROM */ + fseek(fp, 0, SEEK_SET); + val = 0; + if (!fwrite(&val, 1, 1, fp)) { + DEBUG("%s\n", "Failed to disable pci-sysfs rom file"); + } + fclose(fp); + + return ptr; +} |