1 files changed, 75 insertions, 0 deletions
diff --git a/src/include/hw/block/block.h b/src/include/hw/block/block.h
new file mode 100644
index 0000000..8d7c4b4
--- /dev/null
+++ b/src/include/hw/block/block.h
@@ -0,0 +1,75 @@
+/*
+ * Common code for block device models
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later.  See the COPYING file in the top-level directory.
+ */
+
+#ifndef HW_BLOCK_COMMON_H
+#define HW_BLOCK_COMMON_H
+
+#include "qemu-common.h"
+#include "qapi/error.h"
+
+/* Configuration */
+
+typedef struct BlockConf {
+    BlockBackend *blk;
+    uint16_t physical_block_size;
+    uint16_t logical_block_size;
+    uint16_t min_io_size;
+    uint32_t opt_io_size;
+    int32_t bootindex;
+    uint32_t discard_granularity;
+    /* geometry, not all devices use this */
+    uint32_t cyls, heads, secs;
+} BlockConf;
+
+static inline unsigned int get_physical_block_exp(BlockConf *conf)
+{
+    unsigned int exp = 0, size;
+
+    for (size = conf->physical_block_size;
+        size > conf->logical_block_size;
+        size >>= 1) {
+        exp++;
+    }
+
+    return exp;
+}
+
+#define DEFINE_BLOCK_PROPERTIES(_state, _conf)                          \
+    DEFINE_PROP_DRIVE("drive", _state, _conf.blk),                      \
+    DEFINE_PROP_BLOCKSIZE("logical_block_size", _state,                 \
+                          _conf.logical_block_size),                    \
+    DEFINE_PROP_BLOCKSIZE("physical_block_size", _state,                \
+                          _conf.physical_block_size),                   \
+    DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0),  \
+    DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0),    \
+    DEFINE_PROP_UINT32("discard_granularity", _state, \
+                       _conf.discard_granularity, -1)
+
+#define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf)      \
+    DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0),  \
+    DEFINE_PROP_UINT32("heads", _state, _conf.heads, 0), \
+    DEFINE_PROP_UINT32("secs", _state, _conf.secs, 0)
+
+/* Configuration helpers */
+
+void blkconf_serial(BlockConf *conf, char **serial);
+void blkconf_geometry(BlockConf *conf, int *trans,
+                      unsigned cyls_max, unsigned heads_max, unsigned secs_max,
+                      Error **errp);
+void blkconf_blocksizes(BlockConf *conf);
+
+/* Hard disk geometry */
+
+void hd_geometry_guess(BlockBackend *blk,
+                       uint32_t *pcyls, uint32_t *pheads, uint32_t *psecs,
+                       int *ptrans);
+int hd_bios_chs_auto_trans(uint32_t cyls, uint32_t heads, uint32_t secs);
+
+#endif