[Qemu-devel] [PATCH 2/3] fw_cfg: file xfer api

[Gerd Hoffmann <kraxel@redhat.com>]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/fw_cfg.c |   22 ++++++++++++++++++++++
 hw/fw_cfg.h |   22 +++++++++++++++++++++-
 2 files changed, 43 insertions(+), 1 deletions(-)

diff --git a/hw/fw_cfg.c b/hw/fw_cfg.c
index 2e3662d..1dd7d6a 100644
--- a/hw/fw_cfg.c
+++ b/hw/fw_cfg.c
@@ -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 +274,27 @@ int fw_cfg_add_callback(FWCfgState *s, uint16_t key, FWCfgCallback callback,
     return 1;
 }
 
+int fw_cfg_add_file(FWCfgState *s, uint8_t type, uint8_t *data, uint32_t len)
+{
+    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);
+    }
+    if (s->files->count == FW_CFG_FILE_SLOTS) {
+        fprintf(stderr, "fw_cfg: out of file slots\n");
+        return 0;
+    }
+
+    fw_cfg_add_bytes(s, FW_CFG_FILE_FIRST + s->files->count, data, len);
+    s->files->f[s->files->count].type   = type;
+    s->files->f[s->files->count].size   = len;
+    s->files->f[s->files->count].select = FW_CFG_FILE_FIRST + s->files->count;
+    s->files->count++;
+
+    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)
 {
diff --git a/hw/fw_cfg.h b/hw/fw_cfg.h
index b06665e..460d64d 100644
--- a/hw/fw_cfg.h
+++ b/hw/fw_cfg.h
@@ -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
@@ -34,6 +38,22 @@
 
 #define FW_CFG_INVALID          0xffff
 
+#define FW_CFG_FILE_TYPE_UNKNOWN    0
+#define FW_CFG_FILE_TYPE_VGABIOS    1
+#define FW_CFG_FILE_TYPE_OPTIONROM  2
+
+typedef struct FWCfgFile {
+    uint32_t  size;        /* file size */
+    uint16_t  select;      /* write this to 0x510 to read it */
+    uint8_t   type;        /* vga, option, other? */
+    uint8_t   reserved;
+} FWCfgFile;
+
+typedef struct FWCfgFiles {
+    uint32_t  count;
+    FWCfgFile f[];
+} FWCfgFiles;
+
 #ifndef NO_QEMU_PROTOS
 typedef void (*FWCfgCallback)(void *opaque, uint8_t *data);
 
-- 
1.6.5.2