SmartFS: Implements wear-leveling in the SmartFS. From Ken Pettit

include/nuttx/fs/ioctl.h

@@ -200,6 +200,12 @@
                                            *      ProcFS data.
                                            * OUT: None (ioctl return value provides
                                            *      success/failure indication). */
+#define BIOC_DEBUGCMD   _BIOC(0x000B)     /* Send driver specific debug command /
+                                           * data to the block device.
+                                           * IN:  Pointer to a struct defined for
+                                           *      the block with specific debug
+                                           *      command and data.
+                                           * OUT: None.  */
 
 /* NuttX MTD driver ioctl definitions ***************************************/
 

include/nuttx/fs/smart.h

@@ -89,6 +89,20 @@ struct smart_read_write_s
   const uint8_t *buffer;  /* Pointer to the data to write */
 };
 
+/* The following defines the procfs data exchange interface between the
+ * SMART MTD and FS layers.
+ */
+
+#if defined(CONFIG_FS_PROCFS) && !defined(CONFIG_FS_PROCFS_EXCLUDE_SMARTFS)
+struct smart_procfs_data_s
+{
+#ifdef CONFIG_MTD_SMART_ERASE_DEBUG
+  const uint16_t  *erasecounts;   /* Pointer to the erase counts array */
+  uint16_t        erasesize;      /* Number of entries in the erase counts array */
+#endif
+};
+#endif
+
 /****************************************************************************
  * Public Data
  ****************************************************************************/

include/nuttx/mtd/smart.h

@@ -50,6 +50,9 @@
  * Pre-Processor Definitions
  ****************************************************************************/
 
+#define SMART_DEBUG_CMD_SET_DEBUG_LEVEL   1
+#define SMART_DEBUG_CMD_SHOW_LOGMAP       2
+
 /****************************************************************************
  * Public Types
  ****************************************************************************/
@@ -91,6 +94,19 @@ struct mtd_smart_procfs_data_s
   FAR const struct smart_alloc_s  *allocs; /* Array of allocations */ 
   uint16_t            alloccount;       /* Number of items in the array */
 #endif
+#ifdef CONFIG_MTD_SMART_WEAR_LEVEL
+  uint32_t            uneven_wearcount; /* Number of uneven block erases */
+#endif
+};
+
+/* The following defines debug command data passed from the procfs layer to
+   the SMART MTD layer for debug purposes.
+ */
+
+struct mtd_smart_debug_data_s
+{
+  uint8_t             debugcmd;         /* Debug command */
+  uint32_t            debugdata;        /* Debug data */
 };
 
 /****************************************************************************