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fw_cfg: add API for file transfer.

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This patch adds a file transfer interface to fw_cfg.  Intended to be
used for passing non-pci option roms and vgabios to seabios.  Namespace
is modeled after the existing cbfs filesystem support in seabios.

Reading the new FW_CFG_FILE_DIR entry returns a file list.
Fields there are in network byte order (aka bigendian).

aliguori: fix fw_cfg.h for multiboot.bin, add proper fw_cfg.h declarations,
          quiet fprintf() in fw_cfg.c

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2009-12-18 12:01:10 +01:00 committed by Anthony Liguori
parent c2b5bda43a
commit abe147e0ce
2 changed files with 62 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
hw/fw_cfg.c
View File

@ -47,6 +47,7 @@ typedef struct _FWCfgEntry {
struct _FWCfgState {
FWCfgEntry entries[2][FW_CFG_MAX_ENTRY];
FWCfgFiles *files;
uint16_t cur_entry;
uint32_t cur_offset;
};
@ -273,6 +274,48 @@ int fw_cfg_add_callback(FWCfgState *s, uint16_t key, FWCfgCallback callback,
return 1;
}
int fw_cfg_add_file(FWCfgState *s, const char *dir, const char *filename,
uint8_t *data, uint32_t len)
{
const char *basename;
int index;
if (!s->files) {
int dsize = sizeof(uint32_t) + sizeof(FWCfgFile) * FW_CFG_FILE_SLOTS;
s->files = qemu_mallocz(dsize);
fw_cfg_add_bytes(s, FW_CFG_FILE_DIR, (uint8_t*)s->files, dsize);
}
index = be32_to_cpu(s->files->count);
if (index == FW_CFG_FILE_SLOTS) {
fprintf(stderr, "fw_cfg: out of file slots\n");
return 0;
}
fw_cfg_add_bytes(s, FW_CFG_FILE_FIRST + index, data, len);
basename = strrchr(filename, '/');
if (basename) {
basename++;
} else {
basename = filename;
}
if (dir) {
snprintf(s->files->f[index].name, sizeof(s->files->f[index].name),
"%s/%s", dir, basename);
} else {
snprintf(s->files->f[index].name, sizeof(s->files->f[index].name),
"%s", basename);
}
s->files->f[index].size = cpu_to_be32(len);
s->files->f[index].select = cpu_to_be16(FW_CFG_FILE_FIRST + index);
FW_CFG_DPRINTF("%s: #%d: %s (%d bytes)\n", __FUNCTION__,
index, s->files->f[index].name, len);
s->files->count = cpu_to_be32(index+1);
return 1;
}
FWCfgState *fw_cfg_init(uint32_t ctl_port, uint32_t data_port,
target_phys_addr_t ctl_addr, target_phys_addr_t data_addr)
{

21
hw/fw_cfg.h
View File

@ -26,7 +26,11 @@
#define FW_CFG_SETUP_ADDR 0x16
#define FW_CFG_SETUP_SIZE 0x17
#define FW_CFG_SETUP_DATA 0x18
#define FW_CFG_MAX_ENTRY 0x19
#define FW_CFG_FILE_DIR 0x19
#define FW_CFG_FILE_FIRST 0x20
#define FW_CFG_FILE_SLOTS 0x10
#define FW_CFG_MAX_ENTRY (FW_CFG_FILE_FIRST+FW_CFG_FILE_SLOTS)
#define FW_CFG_WRITE_CHANNEL 0x4000
#define FW_CFG_ARCH_LOCAL 0x8000
@ -35,6 +39,18 @@
#define FW_CFG_INVALID 0xffff
#ifndef NO_QEMU_PROTOS
typedef struct FWCfgFile {
uint32_t size; /* file size */
uint16_t select; /* write this to 0x510 to read it */
uint16_t reserved;
char name[56];
} FWCfgFile;
typedef struct FWCfgFiles {
uint32_t count;
FWCfgFile f[];
} FWCfgFiles;
typedef void (*FWCfgCallback)(void *opaque, uint8_t *data);
typedef struct _FWCfgState FWCfgState;
@ -44,7 +60,8 @@ int fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value);
int fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value);
int fw_cfg_add_callback(FWCfgState *s, uint16_t key, FWCfgCallback callback,
void *callback_opaque, uint8_t *data, size_t len);
int fw_cfg_add_file(FWCfgState *s, uint8_t type, uint8_t *data, uint32_t len);
int fw_cfg_add_file(FWCfgState *s, const char *dir, const char *filename,
uint8_t *data, uint32_t len);
FWCfgState *fw_cfg_init(uint32_t ctl_port, uint32_t data_port,
target_phys_addr_t crl_addr, target_phys_addr_t data_addr);