[3c68c6c8] | 1 | /* |
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| 2 | * flashdisk.c -- Flash disk block device implementation |
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| 3 | * |
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| 4 | * Copyright (C) 2007 Chris Johns |
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| 5 | * |
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[30088aa] | 6 | * The license and distribution terms for this file may be |
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| 7 | * found in the file LICENSE in this distribution or at |
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| 8 | * http://www.rtems.com/license/LICENSE. |
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| 9 | * |
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[3c68c6c8] | 10 | * $Id$ |
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| 11 | */ |
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| 12 | /** |
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| 13 | * @file |
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| 14 | * |
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| 15 | * Flash disk driver for RTEMS provides support for block based |
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| 16 | * file systems on flash devices. The driver is not a flash file |
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| 17 | * system nor does it try to compete with flash file systems. It |
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| 18 | * currently does not journal how-ever block sequence numbering |
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| 19 | * could be added to allow recovery of a past positions if |
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| 20 | * a power down occurred while being updated. |
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| 21 | * |
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| 22 | * This flash driver provides block device support for most flash |
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| 23 | * devices. The driver has been tested on NOR type devices such |
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| 24 | * as the AMLV160 or M28W160. Support for NAND type devices may |
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| 25 | * require driver changes to allow speedy recover of the block |
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| 26 | * mapping data and to also handle the current use of word programming. |
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| 27 | * Currently the page descriptors are stored in the first few pages |
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| 28 | * of each segment. |
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| 29 | * |
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| 30 | * The driver supports devices, segments and pages. You provide |
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| 31 | * to the driver the device descriptions as a table of device |
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| 32 | * descriptors. Each device descriptor contain a table of |
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| 33 | * segment descriptions or segment descriptors. The driver uses |
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| 34 | * this information to manage the devices. |
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| 35 | * |
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| 36 | * A device is made up of segments. These are also called |
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| 37 | * sectors or blocks. It is the smallest erasable part of a device. |
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| 38 | * A device can have differing size segments at different |
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| 39 | * offsets in the device. The segment descriptors support repeating |
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| 40 | * segments that are continous in the device. The driver breaks the |
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| 41 | * segments up into pages. The first pages of a segment contain |
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| 42 | * the page descriptors. A page descriptor hold the page flags, |
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| 43 | * a CRC for the page of data and the block number the page |
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| 44 | * holds. The block can appear in any order in the devices. A |
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| 45 | * page is active if it hold a current block of data. If the |
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| 46 | * used bit is set the page is counted as used. A page moves |
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| 47 | * from erased to active to used then back to erased. If a block |
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| 48 | * is written that is already in a page, the block is written to |
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| 49 | * a new page the old page is flagged as used. |
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| 50 | * |
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| 51 | * At initialisation time each segment's page descriptors are |
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| 52 | * read into memory and scanned to determine the active pages, |
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| 53 | * the used pages and the bad pages. If a segment has any erased |
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| 54 | * pages it is queue on the available queue. If the segment has |
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| 55 | * no erased pages it is queue on the used queue. |
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| 56 | * |
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| 57 | * The available queue is sorted from the least number available |
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| 58 | * to the most number of available pages. A segment that has just |
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| 59 | * been erased will placed at the end of the queue. A segment that |
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| 60 | * has only a few available pages will be used sooner and once |
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| 61 | * there are no available pages it is queued on the used queue. |
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| 62 | * The used queue hold segments that have no available pages and |
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| 63 | * is sorted from the least number of active pages to the most |
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| 64 | * number of active pages. |
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| 65 | * |
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| 66 | * The driver is required to compact segments. Compacting takes |
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| 67 | * the segment with the most number of available pages from the |
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| 68 | * available queue then takes segments with the least number of |
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| 69 | * active pages from the used queue until it has enough pages |
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| 70 | * to fill the empty segment. As the active pages are moved |
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| 71 | * they flagged as used and once the segment has only used pages |
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| 72 | * it is erased. |
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| 73 | * |
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| 74 | * A flash block driver like this never knows if a page is not |
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| 75 | * being used by the file-system. A typical file system is not |
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| 76 | * design with the idea of erasing a block on a disk once it is |
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| 77 | * not being used. The file-system will normally use a flag |
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| 78 | * or a location as a marker to say that part of the disk is |
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| 79 | * no longer in use. This means a number of blocks could be |
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| 80 | * held in active pages but are no in use by the file system. |
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| 81 | * The file system may also read blocks that have never been |
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| 82 | * written to disk. This complicates the driver and may make |
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| 83 | * the wear, usage and erase patterns harsher than a flash |
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| 84 | * file system. The driver may also suffer from problems if |
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| 85 | * power is lost. |
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| 86 | * |
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| 87 | * @note |
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| 88 | * |
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| 89 | * The use of pages can vary. The rtems_fdisk_seg_*_page set |
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| 90 | * routines use an absolute page number relative to the segment |
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| 91 | * while all other page numbera are relative to the number of |
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| 92 | * page descriptor pages a segment has. You need to add the |
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| 93 | * number of page descriptor pages (pages_desc) to the page number |
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| 94 | * when call the rtems_fdisk_seg_*_page functions. |
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| 95 | * |
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| 96 | * You must always show the page number as relative in any trace |
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| 97 | * or error message as device-segment-page and if you have to |
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| 98 | * the page number as absolute use device-segment~page. This |
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| 99 | * can be seen in the page copy routine. |
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| 100 | * |
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| 101 | * The code is like this to avoid needing the pass the pages_desc |
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| 102 | * value around. It is only used in selected places and so the |
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| 103 | * extra parameter was avoided. |
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| 104 | */ |
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| 105 | |
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| 106 | #if HAVE_CONFIG_H |
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| 107 | #include "config.h" |
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| 108 | #endif |
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| 109 | |
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| 110 | #include <rtems.h> |
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| 111 | #include <rtems/libio.h> |
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| 112 | #include <errno.h> |
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| 113 | #include <stdlib.h> |
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| 114 | #include <stdio.h> |
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| 115 | #include <string.h> |
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| 116 | #include <inttypes.h> |
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| 117 | |
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| 118 | #include "rtems/blkdev.h" |
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| 119 | #include "rtems/diskdevs.h" |
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| 120 | #include "rtems/flashdisk.h" |
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| 121 | |
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| 122 | /** |
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| 123 | * Control tracing. It can be compiled out of the code for small |
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| 124 | * footprint targets. Leave in by default. |
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| 125 | */ |
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| 126 | #if !defined (RTEMS_FDISK_TRACE) |
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| 127 | #define RTEMS_FDISK_TRACE 1 |
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| 128 | #endif |
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| 129 | |
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| 130 | /** |
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| 131 | * The start of a segment has a segment control table. This hold the CRC and |
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| 132 | * block number for the page. |
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| 133 | * |
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| 134 | * @todo A sequence number for the block could be added. This would |
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| 135 | * mean a larger descriptor size. Need to make the sequence |
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| 136 | * large like 20+ bits so a large file system would not have |
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| 137 | * more blocks available then the sequence number. |
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| 138 | */ |
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| 139 | typedef struct rtems_fdisk_page_desc |
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| 140 | { |
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| 141 | uint16_t crc; /**< The page's checksum. */ |
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| 142 | uint16_t flags; /**< The flags for the page. */ |
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| 143 | uint32_t block; /**< The block number. */ |
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| 144 | } rtems_fdisk_page_desc; |
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| 145 | |
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| 146 | /** |
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| 147 | * Flag the page as active. |
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| 148 | */ |
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| 149 | #define RTEMS_FDISK_PAGE_ACTIVE (1 << 0) |
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| 150 | |
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| 151 | /** |
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| 152 | * Flag the page as used. |
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| 153 | */ |
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| 154 | #define RTEMS_FDISK_PAGE_USED (1 << 1) |
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| 155 | |
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| 156 | /** |
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| 157 | * Flash Segment Control holds the pointer to the segment, number of |
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| 158 | * pages, various page stats and the memory copy of the page descriptors. |
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| 159 | */ |
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| 160 | typedef struct rtems_fdisk_segment_ctl |
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| 161 | { |
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| 162 | /** |
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| 163 | * Segments with available pages are maintained as a linked list. |
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| 164 | */ |
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| 165 | struct rtems_fdisk_segment_ctl* next; |
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| 166 | |
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| 167 | /** |
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| 168 | * The descriptor provided by the low-level driver. |
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| 169 | */ |
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| 170 | const rtems_fdisk_segment_desc* descriptor; |
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| 171 | |
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| 172 | /** |
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| 173 | * The device this segment resides on. |
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| 174 | */ |
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| 175 | uint32_t device; |
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| 176 | |
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| 177 | /** |
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| 178 | * The segment in the device. This must be within the |
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| 179 | * segment descriptor. |
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| 180 | */ |
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| 181 | uint32_t segment; |
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| 182 | |
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| 183 | /** |
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| 184 | * The in-memory ocpy of the page descriptors found at |
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| 185 | * the start of the segment in the flash device. |
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| 186 | */ |
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| 187 | rtems_fdisk_page_desc* page_descriptors; |
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| 188 | |
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| 189 | /* |
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| 190 | * Page stats. |
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| 191 | * |
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| 192 | * A bad page does not checksum or is not erased or has invalid flags. |
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| 193 | */ |
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| 194 | uint32_t pages; /**< Total number of pages in the segment. */ |
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| 195 | uint32_t pages_desc; /**< Number of pages used for page descriptors. */ |
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| 196 | uint32_t pages_active; /**< Number of pages flagged as active. */ |
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| 197 | uint32_t pages_used; /**< Number of pages flagged as used. */ |
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| 198 | uint32_t pages_bad; /**< Number of pages detected as bad. */ |
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| 199 | |
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[a5de1ef] | 200 | uint32_t failed; /**< The segment has failed. */ |
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| 201 | |
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[3c68c6c8] | 202 | uint32_t erased; /**< Counter to debugging. Wear support would |
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| 203 | remove this. */ |
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| 204 | } rtems_fdisk_segment_ctl; |
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| 205 | |
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| 206 | /** |
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| 207 | * Segment control table queue. |
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| 208 | */ |
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| 209 | typedef struct rtems_fdisk_segment_ctl_queue |
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| 210 | { |
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| 211 | rtems_fdisk_segment_ctl* head; |
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| 212 | rtems_fdisk_segment_ctl* tail; |
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[a5de1ef] | 213 | uint32_t count; |
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[3c68c6c8] | 214 | } rtems_fdisk_segment_ctl_queue; |
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| 215 | |
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| 216 | /** |
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| 217 | * Flash Device Control holds the segment controls |
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| 218 | */ |
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| 219 | typedef struct rtems_fdisk_device_ctl |
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| 220 | { |
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| 221 | rtems_fdisk_segment_ctl* segments; /**< Segment controls. */ |
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| 222 | uint32_t segment_count; /**< Segment control count. */ |
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| 223 | const rtems_fdisk_device_desc* descriptor; /**< Device descriptor. */ |
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| 224 | } rtems_fdisk_device_ctl; |
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| 225 | |
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| 226 | /** |
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| 227 | * The Block control holds the segment and page with the data. |
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| 228 | */ |
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| 229 | typedef struct rtems_fdisk_block_ctl |
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| 230 | { |
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| 231 | rtems_fdisk_segment_ctl* segment; /**< The segment with the block. */ |
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| 232 | uint32_t page; /**< The page in the segment. */ |
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| 233 | } rtems_fdisk_block_ctl; |
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| 234 | |
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| 235 | /** |
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| 236 | * The virtual block table holds the mapping for blocks as seen by the disk |
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| 237 | * drivers to the device, segment and page numbers of the physical device. |
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| 238 | */ |
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| 239 | typedef struct rtems_flashdisk |
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| 240 | { |
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| 241 | rtems_device_major_number major; /**< The driver's major number. */ |
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| 242 | rtems_device_minor_number minor; /**< The driver's minor number. */ |
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| 243 | |
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| 244 | uint32_t flags; /**< configuration flags. */ |
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| 245 | |
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| 246 | uint32_t compact_segs; /**< Max segs to compact at once. */ |
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[a5de1ef] | 247 | uint32_t avail_compact_segs; /**< The number of segments when |
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| 248 | compaction occurs when writing. */ |
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[3c68c6c8] | 249 | |
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| 250 | uint32_t block_size; /**< The block size for this disk. */ |
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| 251 | rtems_fdisk_block_ctl* blocks; /**< The block to segment-page |
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| 252 | mappings. */ |
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[a5de1ef] | 253 | uint32_t block_count; /**< The number of avail. blocks. */ |
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| 254 | uint32_t unavail_blocks; /**< The number of unavail blocks. */ |
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| 255 | |
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[3c68c6c8] | 256 | rtems_fdisk_device_ctl* devices; /**< The flash devices for this |
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| 257 | disk. */ |
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| 258 | uint32_t device_count; /**< The number of flash devices. */ |
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| 259 | |
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| 260 | rtems_fdisk_segment_ctl_queue available; /**< The queue of segments with |
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| 261 | available pages. */ |
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| 262 | rtems_fdisk_segment_ctl_queue used; /**< The list of segments with all |
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| 263 | pages used. */ |
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| 264 | rtems_fdisk_segment_ctl_queue erase; /**< The list of segments to be |
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| 265 | erased. */ |
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| 266 | rtems_fdisk_segment_ctl_queue failed; /**< The list of segments that failed |
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| 267 | when being erased. */ |
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| 268 | rtems_id lock; /**< Mutex for threading protection.*/ |
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| 269 | |
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| 270 | uint8_t* copy_buffer; /**< Copy buf used during compacting */ |
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| 271 | |
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| 272 | uint32_t info_level; /**< The info trace level. */ |
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| 273 | } rtems_flashdisk; |
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| 274 | |
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| 275 | /** |
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| 276 | * The array of flash disks we support. |
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| 277 | */ |
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| 278 | static rtems_flashdisk* rtems_flashdisks; |
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| 279 | |
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| 280 | /** |
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| 281 | * The number of flash disks we have. |
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| 282 | */ |
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| 283 | static uint32_t rtems_flashdisk_count; |
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| 284 | |
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| 285 | /** |
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| 286 | * The CRC16 factor table. Created during initialisation. |
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| 287 | */ |
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| 288 | static uint16_t* rtems_fdisk_crc16_factor; |
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| 289 | |
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| 290 | /** |
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| 291 | * Calculate the CRC16 checksum. |
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| 292 | * |
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| 293 | * @param _b The byte to checksum. |
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| 294 | * @param _c The current checksum. |
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| 295 | */ |
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| 296 | #define rtems_fdisk_calc_crc16(_b, _c) \ |
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| 297 | rtems_fdisk_crc16_factor[((_b) ^ ((_c) & 0xff)) & 0xff] ^ (((_c) >> 8) & 0xff) |
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| 298 | |
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| 299 | /** |
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| 300 | * Generate the CRC table. |
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| 301 | * |
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| 302 | * @param pattern The seed pattern for the table of factors. |
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| 303 | * @relval RTEMS_SUCCESSFUL The table was generated. |
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| 304 | * @retval RTEMS_NO_MEMORY The table could not be allocated from the heap. |
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| 305 | */ |
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| 306 | rtems_status_code |
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| 307 | rtems_fdisk_crc16_gen_factors (uint16_t pattern) |
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| 308 | { |
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| 309 | uint32_t b; |
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| 310 | |
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| 311 | rtems_fdisk_crc16_factor = malloc (sizeof (uint16_t) * 256); |
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| 312 | if (!rtems_fdisk_crc16_factor) |
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| 313 | return RTEMS_NO_MEMORY; |
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| 314 | |
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| 315 | for (b = 0; b < 256; b++) |
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| 316 | { |
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| 317 | uint32_t i; |
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| 318 | uint16_t v = b; |
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| 319 | for (i = 8; i--;) |
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| 320 | v = v & 1 ? (v >> 1) ^ pattern : v >> 1; |
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| 321 | rtems_fdisk_crc16_factor[b] = v & 0xffff; |
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| 322 | } |
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| 323 | return RTEMS_SUCCESSFUL; |
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| 324 | } |
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| 325 | |
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| 326 | #if RTEMS_FDISK_TRACE |
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| 327 | /** |
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| 328 | * Print a message to the flash disk output and flush it. |
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| 329 | * |
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| 330 | * @param fd The flashdisk control structure. |
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| 331 | * @param format The format string. See printf for details. |
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| 332 | * @param ... The arguments for the format text. |
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| 333 | * @return int The number of bytes written to the output. |
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| 334 | */ |
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| 335 | static int |
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| 336 | rtems_fdisk_printf (const rtems_flashdisk* fd, const char *format, ...) |
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| 337 | { |
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| 338 | int ret = 0; |
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| 339 | if (fd->info_level >= 3) |
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| 340 | { |
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| 341 | va_list args; |
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| 342 | va_start (args, format); |
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| 343 | fprintf (stdout, "fdisk:"); |
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| 344 | ret = vfprintf (stdout, format, args); |
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| 345 | fprintf (stdout, "\n"); |
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| 346 | fflush (stdout); |
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| 347 | } |
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| 348 | return ret; |
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| 349 | } |
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| 350 | |
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| 351 | /** |
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| 352 | * Print a info message to the flash disk output and flush it. |
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| 353 | * |
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| 354 | * @param fd The flashdisk control structure. |
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| 355 | * @param format The format string. See printf for details. |
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| 356 | * @param ... The arguments for the format text. |
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| 357 | * @return int The number of bytes written to the output. |
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| 358 | */ |
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| 359 | static int |
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| 360 | rtems_fdisk_info (const rtems_flashdisk* fd, const char *format, ...) |
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| 361 | { |
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| 362 | int ret = 0; |
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| 363 | if (fd->info_level >= 2) |
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| 364 | { |
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| 365 | va_list args; |
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| 366 | va_start (args, format); |
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| 367 | fprintf (stdout, "fdisk:"); |
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| 368 | ret = vfprintf (stdout, format, args); |
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| 369 | fprintf (stdout, "\n"); |
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| 370 | fflush (stdout); |
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| 371 | } |
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| 372 | return ret; |
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| 373 | } |
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| 374 | |
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| 375 | /** |
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| 376 | * Print a warning to the flash disk output and flush it. |
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| 377 | * |
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| 378 | * @param fd The flashdisk control structure. |
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| 379 | * @param format The format string. See printf for details. |
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| 380 | * @param ... The arguments for the format text. |
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| 381 | * @return int The number of bytes written to the output. |
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| 382 | */ |
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| 383 | static int |
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| 384 | rtems_fdisk_warning (const rtems_flashdisk* fd, const char *format, ...) |
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| 385 | { |
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| 386 | int ret = 0; |
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| 387 | if (fd->info_level >= 1) |
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| 388 | { |
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| 389 | va_list args; |
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| 390 | va_start (args, format); |
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| 391 | fprintf (stdout, "fdisk:warning:"); |
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| 392 | ret = vfprintf (stdout, format, args); |
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| 393 | fprintf (stdout, "\n"); |
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| 394 | fflush (stdout); |
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| 395 | } |
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| 396 | return ret; |
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| 397 | } |
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| 398 | #endif |
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| 399 | |
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| 400 | /** |
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| 401 | * Print an error to the flash disk output and flush it. |
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| 402 | * |
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| 403 | * @param format The format string. See printf for details. |
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| 404 | * @param ... The arguments for the format text. |
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| 405 | * @return int The number of bytes written to the output. |
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| 406 | */ |
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| 407 | static int |
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| 408 | rtems_fdisk_error (const char *format, ...) |
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| 409 | { |
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| 410 | int ret; |
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| 411 | va_list args; |
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| 412 | va_start (args, format); |
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| 413 | fprintf (stderr, "fdisk:error:"); |
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| 414 | ret = vfprintf (stderr, format, args); |
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| 415 | fprintf (stderr, "\n"); |
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| 416 | fflush (stderr); |
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| 417 | return ret; |
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| 418 | } |
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| 419 | |
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| 420 | /** |
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| 421 | * Print an abort message, flush it then abort the program. |
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| 422 | * |
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| 423 | * @param format The format string. See printf for details. |
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| 424 | * @param ... The arguments for the format text. |
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| 425 | */ |
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| 426 | static void |
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| 427 | rtems_fdisk_abort (const char *format, ...) |
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| 428 | { |
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| 429 | va_list args; |
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| 430 | va_start (args, format); |
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| 431 | fprintf (stderr, "fdisk:abort:"); |
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| 432 | vfprintf (stderr, format, args); |
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| 433 | fprintf (stderr, "\n"); |
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| 434 | fflush (stderr); |
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| 435 | exit (1); |
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| 436 | } |
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| 437 | |
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| 438 | /** |
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| 439 | * Initialise the segment control queue. |
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| 440 | */ |
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| 441 | static void |
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| 442 | rtems_fdisk_segment_queue_init (rtems_fdisk_segment_ctl_queue* queue) |
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| 443 | { |
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| 444 | queue->head = queue->tail = 0; |
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[a5de1ef] | 445 | queue->count = 0; |
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| 446 | } |
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| 447 | |
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| 448 | /** |
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| 449 | * Push to the head of the segment control queue. |
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| 450 | */ |
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| 451 | static void |
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| 452 | rtems_fdisk_segment_queue_push_head (rtems_fdisk_segment_ctl_queue* queue, |
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| 453 | rtems_fdisk_segment_ctl* sc) |
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| 454 | { |
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| 455 | if (sc) |
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| 456 | { |
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| 457 | sc->next = queue->head; |
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| 458 | queue->head = sc; |
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| 459 | |
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| 460 | if (queue->tail == 0) |
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| 461 | queue->tail = sc; |
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| 462 | queue->count++; |
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| 463 | } |
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[3c68c6c8] | 464 | } |
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| 465 | |
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| 466 | /** |
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| 467 | * Pop the head of the segment control queue. |
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| 468 | */ |
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| 469 | static rtems_fdisk_segment_ctl* |
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| 470 | rtems_fdisk_segment_queue_pop_head (rtems_fdisk_segment_ctl_queue* queue) |
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| 471 | { |
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| 472 | if (queue->head) |
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| 473 | { |
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| 474 | rtems_fdisk_segment_ctl* sc = queue->head; |
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| 475 | |
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| 476 | queue->head = sc->next; |
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| 477 | if (!queue->head) |
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| 478 | queue->tail = 0; |
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| 479 | |
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[a5de1ef] | 480 | queue->count--; |
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| 481 | |
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[3c68c6c8] | 482 | sc->next = 0; |
---|
| 483 | |
---|
| 484 | return sc; |
---|
| 485 | } |
---|
| 486 | |
---|
| 487 | return 0; |
---|
| 488 | } |
---|
| 489 | |
---|
| 490 | /** |
---|
| 491 | * Push to the tail of the segment control queue. |
---|
| 492 | */ |
---|
| 493 | static void |
---|
| 494 | rtems_fdisk_segment_queue_push_tail (rtems_fdisk_segment_ctl_queue* queue, |
---|
| 495 | rtems_fdisk_segment_ctl* sc) |
---|
| 496 | { |
---|
| 497 | if (sc) |
---|
| 498 | { |
---|
| 499 | sc->next = 0; |
---|
| 500 | |
---|
| 501 | if (queue->head) |
---|
| 502 | { |
---|
| 503 | queue->tail->next = sc; |
---|
| 504 | queue->tail = sc; |
---|
| 505 | } |
---|
| 506 | else |
---|
| 507 | { |
---|
| 508 | queue->head = queue->tail = sc; |
---|
| 509 | } |
---|
[a5de1ef] | 510 | |
---|
| 511 | queue->count++; |
---|
[3c68c6c8] | 512 | } |
---|
| 513 | } |
---|
| 514 | |
---|
| 515 | /** |
---|
| 516 | * Remove from the segment control queue. |
---|
| 517 | */ |
---|
| 518 | static void |
---|
| 519 | rtems_fdisk_segment_queue_remove (rtems_fdisk_segment_ctl_queue* queue, |
---|
| 520 | rtems_fdisk_segment_ctl* sc) |
---|
| 521 | { |
---|
| 522 | rtems_fdisk_segment_ctl* prev = 0; |
---|
| 523 | rtems_fdisk_segment_ctl* it = queue->head; |
---|
| 524 | |
---|
| 525 | /* |
---|
| 526 | * Do not change sc->next as sc could be on another queue. |
---|
| 527 | */ |
---|
| 528 | |
---|
| 529 | while (it) |
---|
| 530 | { |
---|
| 531 | if (sc == it) |
---|
| 532 | { |
---|
| 533 | if (prev == 0) |
---|
| 534 | { |
---|
| 535 | queue->head = sc->next; |
---|
| 536 | if (queue->head == 0) |
---|
| 537 | queue->tail = 0; |
---|
| 538 | } |
---|
| 539 | else |
---|
| 540 | { |
---|
| 541 | prev->next = sc->next; |
---|
| 542 | if (queue->tail == sc) |
---|
| 543 | queue->tail = prev; |
---|
| 544 | } |
---|
| 545 | sc->next = 0; |
---|
[a5de1ef] | 546 | queue->count--; |
---|
[3c68c6c8] | 547 | break; |
---|
| 548 | } |
---|
| 549 | |
---|
| 550 | prev = it; |
---|
| 551 | it = it->next; |
---|
| 552 | } |
---|
| 553 | } |
---|
| 554 | |
---|
| 555 | /** |
---|
| 556 | * Insert into the segment control queue before the specific |
---|
| 557 | * segment control item. |
---|
| 558 | */ |
---|
| 559 | static void |
---|
| 560 | rtems_fdisk_segment_queue_insert_before (rtems_fdisk_segment_ctl_queue* queue, |
---|
| 561 | rtems_fdisk_segment_ctl* item, |
---|
| 562 | rtems_fdisk_segment_ctl* sc) |
---|
| 563 | { |
---|
| 564 | if (item) |
---|
| 565 | { |
---|
| 566 | rtems_fdisk_segment_ctl** prev = &queue->head; |
---|
| 567 | rtems_fdisk_segment_ctl* it = queue->head; |
---|
| 568 | |
---|
| 569 | while (it) |
---|
| 570 | { |
---|
| 571 | if (item == it) |
---|
| 572 | { |
---|
| 573 | sc->next = item; |
---|
| 574 | *prev = sc; |
---|
[a5de1ef] | 575 | queue->count++; |
---|
[3c68c6c8] | 576 | return; |
---|
| 577 | } |
---|
| 578 | |
---|
| 579 | prev = &it->next; |
---|
| 580 | it = it->next; |
---|
| 581 | } |
---|
| 582 | } |
---|
| 583 | |
---|
| 584 | rtems_fdisk_segment_queue_push_tail (queue, sc); |
---|
| 585 | } |
---|
| 586 | |
---|
| 587 | /** |
---|
| 588 | * Count the number of elements on the list. |
---|
| 589 | */ |
---|
| 590 | static uint32_t |
---|
| 591 | rtems_fdisk_segment_queue_count (rtems_fdisk_segment_ctl_queue* queue) |
---|
[a5de1ef] | 592 | { |
---|
| 593 | return queue->count; |
---|
| 594 | } |
---|
| 595 | |
---|
| 596 | /** |
---|
| 597 | * Count the number of elements on the list. |
---|
| 598 | */ |
---|
| 599 | static uint32_t |
---|
| 600 | rtems_fdisk_segment_count_queue (rtems_fdisk_segment_ctl_queue* queue) |
---|
[3c68c6c8] | 601 | { |
---|
| 602 | rtems_fdisk_segment_ctl* sc = queue->head; |
---|
| 603 | uint32_t count = 0; |
---|
| 604 | |
---|
| 605 | while (sc) |
---|
| 606 | { |
---|
| 607 | count++; |
---|
| 608 | sc = sc->next; |
---|
| 609 | } |
---|
| 610 | |
---|
| 611 | return count; |
---|
| 612 | } |
---|
| 613 | |
---|
| 614 | /** |
---|
| 615 | * See if a segment control is present on this queue. |
---|
| 616 | */ |
---|
| 617 | static bool |
---|
| 618 | rtems_fdisk_segment_queue_present (rtems_fdisk_segment_ctl_queue* queue, |
---|
| 619 | rtems_fdisk_segment_ctl* sc) |
---|
| 620 | { |
---|
| 621 | rtems_fdisk_segment_ctl* it = queue->head; |
---|
| 622 | |
---|
| 623 | while (it) |
---|
| 624 | { |
---|
| 625 | if (it == sc) |
---|
| 626 | return true; |
---|
| 627 | it = it->next; |
---|
| 628 | } |
---|
| 629 | |
---|
| 630 | return false; |
---|
| 631 | } |
---|
| 632 | |
---|
| 633 | /** |
---|
[a5de1ef] | 634 | * Format a string with the queue status. |
---|
[3c68c6c8] | 635 | */ |
---|
[a5de1ef] | 636 | static void |
---|
| 637 | rtems_fdisk_queue_status (rtems_flashdisk* fd, |
---|
| 638 | rtems_fdisk_segment_ctl* sc, |
---|
| 639 | char queues[5]) |
---|
[3c68c6c8] | 640 | { |
---|
[a5de1ef] | 641 | queues[0] = rtems_fdisk_segment_queue_present (&fd->available, sc) ? 'A' : '-'; |
---|
| 642 | queues[1] = rtems_fdisk_segment_queue_present (&fd->used, sc) ? 'U' : '-'; |
---|
| 643 | queues[2] = rtems_fdisk_segment_queue_present (&fd->erase, sc) ? 'E' : '-'; |
---|
| 644 | queues[3] = rtems_fdisk_segment_queue_present (&fd->failed, sc) ? 'F' : '-'; |
---|
| 645 | queues[4] = '\0'; |
---|
[3c68c6c8] | 646 | } |
---|
| 647 | |
---|
| 648 | /** |
---|
| 649 | * Check if the page descriptor is erased. |
---|
| 650 | */ |
---|
| 651 | static bool |
---|
| 652 | rtems_fdisk_page_desc_erased (const rtems_fdisk_page_desc* pd) |
---|
| 653 | { |
---|
[a5de1ef] | 654 | return ((pd->crc == 0xffff) && |
---|
| 655 | (pd->flags == 0xffff) && |
---|
| 656 | (pd->block == 0xffffffff)) ? true : false; |
---|
[3c68c6c8] | 657 | } |
---|
| 658 | |
---|
| 659 | /** |
---|
| 660 | * Check if the flags are set. The flags are inverted as we can |
---|
| 661 | * only set a flag by changing it from 1 to 0. |
---|
| 662 | */ |
---|
| 663 | static bool |
---|
| 664 | rtems_fdisk_page_desc_flags_set (rtems_fdisk_page_desc* pd, uint16_t flags) |
---|
| 665 | { |
---|
| 666 | return (pd->flags & flags) == 0 ? true : false; |
---|
| 667 | } |
---|
| 668 | |
---|
| 669 | /** |
---|
| 670 | * Check if the flags are clear. The flags are inverted as we can |
---|
| 671 | * only set a flag by changing it from 1 to 0. |
---|
| 672 | */ |
---|
| 673 | static bool |
---|
| 674 | rtems_fdisk_page_desc_flags_clear (rtems_fdisk_page_desc* pd, uint16_t flags) |
---|
| 675 | { |
---|
| 676 | return (pd->flags & flags) == flags ? true : false; |
---|
| 677 | } |
---|
| 678 | |
---|
| 679 | /** |
---|
| 680 | * Set the flags. Setting means clear the bit to 0. |
---|
| 681 | */ |
---|
| 682 | static void |
---|
| 683 | rtems_fdisk_page_desc_set_flags (rtems_fdisk_page_desc* pd, uint16_t flags) |
---|
| 684 | { |
---|
| 685 | pd->flags &= ~flags; |
---|
| 686 | } |
---|
| 687 | |
---|
| 688 | /** |
---|
| 689 | * Get the segment descriptor for a device and segment. There are |
---|
| 690 | * no range checks. |
---|
| 691 | */ |
---|
| 692 | static const rtems_fdisk_segment_desc* |
---|
| 693 | rtems_fdisk_seg_descriptor (const rtems_flashdisk* fd, |
---|
| 694 | uint32_t device, |
---|
| 695 | uint32_t segment) |
---|
| 696 | { |
---|
| 697 | return fd->devices[device].segments[segment].descriptor; |
---|
| 698 | } |
---|
| 699 | |
---|
| 700 | /** |
---|
| 701 | * Count the segments for a device. |
---|
| 702 | */ |
---|
| 703 | static uint32_t |
---|
| 704 | rtems_fdisk_count_segments (const rtems_fdisk_device_desc* dd) |
---|
| 705 | { |
---|
| 706 | uint32_t count = 0; |
---|
| 707 | uint32_t segment; |
---|
| 708 | for (segment = 0; segment < dd->segment_count; segment++) |
---|
| 709 | count += dd->segments[segment].count; |
---|
| 710 | return count; |
---|
| 711 | } |
---|
| 712 | |
---|
| 713 | /** |
---|
| 714 | * Calculate the pages in a segment give the segment size and the |
---|
| 715 | * page size. |
---|
| 716 | * |
---|
| 717 | * @param sd The segment descriptor. |
---|
| 718 | * @param page_size The page size in bytes. |
---|
| 719 | */ |
---|
| 720 | static uint32_t |
---|
| 721 | rtems_fdisk_pages_in_segment (const rtems_fdisk_segment_desc* sd, |
---|
| 722 | uint32_t page_size) |
---|
| 723 | { |
---|
| 724 | return sd->size / page_size; |
---|
| 725 | } |
---|
| 726 | |
---|
| 727 | /** |
---|
| 728 | * Calculate the number of pages needed to hold the page descriptors. |
---|
| 729 | * The calculation need to round up. |
---|
| 730 | * |
---|
| 731 | * The segment control contains the number of pages used as descriptors |
---|
| 732 | * and should be used rather than this call where possible. |
---|
| 733 | */ |
---|
| 734 | static uint32_t |
---|
| 735 | rtems_fdisk_page_desc_pages (const rtems_fdisk_segment_desc* sd, |
---|
| 736 | uint32_t page_size) |
---|
| 737 | { |
---|
| 738 | uint32_t pages = rtems_fdisk_pages_in_segment (sd, page_size); |
---|
| 739 | uint32_t bytes = pages * sizeof (rtems_fdisk_page_desc); |
---|
| 740 | return ((bytes - 1) / page_size) + 1; |
---|
| 741 | } |
---|
| 742 | |
---|
| 743 | /** |
---|
| 744 | * The number of available pages is the total pages less the |
---|
| 745 | * active, used and bad pages. |
---|
| 746 | */ |
---|
| 747 | static uint32_t |
---|
| 748 | rtems_fdisk_seg_pages_available (const rtems_fdisk_segment_ctl* sc) |
---|
| 749 | { |
---|
| 750 | return sc->pages - (sc->pages_active + sc->pages_used + sc->pages_bad); |
---|
| 751 | } |
---|
| 752 | /** |
---|
| 753 | * Find the next available page in a segment. |
---|
| 754 | */ |
---|
| 755 | static uint32_t |
---|
| 756 | rtems_fdisk_seg_next_available_page (rtems_fdisk_segment_ctl* sc) |
---|
| 757 | { |
---|
| 758 | rtems_fdisk_page_desc* pd = &sc->page_descriptors[0]; |
---|
| 759 | uint32_t page; |
---|
| 760 | |
---|
| 761 | for (page = 0; page < sc->pages; page++, pd++) |
---|
| 762 | if (rtems_fdisk_page_desc_erased (pd)) |
---|
| 763 | break; |
---|
| 764 | |
---|
| 765 | return page; |
---|
| 766 | } |
---|
| 767 | |
---|
| 768 | /** |
---|
| 769 | * Find the segment on the queue that has the most free pages. |
---|
| 770 | */ |
---|
| 771 | static rtems_fdisk_segment_ctl* |
---|
| 772 | rtems_fdisk_seg_most_available (const rtems_fdisk_segment_ctl_queue* queue) |
---|
| 773 | { |
---|
| 774 | rtems_fdisk_segment_ctl* sc = queue->head; |
---|
| 775 | rtems_fdisk_segment_ctl* biggest = queue->head; |
---|
| 776 | |
---|
| 777 | while (sc) |
---|
| 778 | { |
---|
| 779 | if (rtems_fdisk_seg_pages_available (sc) > |
---|
| 780 | rtems_fdisk_seg_pages_available (biggest)) |
---|
| 781 | biggest = sc; |
---|
| 782 | sc = sc->next; |
---|
| 783 | } |
---|
| 784 | |
---|
| 785 | return biggest; |
---|
| 786 | } |
---|
| 787 | |
---|
| 788 | /** |
---|
| 789 | * Is the segment all used ? |
---|
| 790 | */ |
---|
| 791 | #if 0 |
---|
| 792 | static bool |
---|
| 793 | rtems_fdisk_seg_pages_all_used (const rtems_fdisk_segment_ctl* sc) |
---|
| 794 | { |
---|
| 795 | return sc->pages == (sc->pages_used + sc->pages_bad) ? true : false; |
---|
| 796 | } |
---|
| 797 | #endif |
---|
| 798 | |
---|
| 799 | /** |
---|
| 800 | * Calculate the blocks in a device. This is the number of |
---|
| 801 | * pages less the pages hold page descriptors. This call be used |
---|
| 802 | * early in the initialisation process and does not rely on |
---|
| 803 | * the system being fully initialised. |
---|
| 804 | * |
---|
| 805 | * @param dd The device descriptor. |
---|
| 806 | * @param page_size The page size in bytes. |
---|
| 807 | */ |
---|
| 808 | static uint32_t |
---|
| 809 | rtems_fdisk_blocks_in_device (const rtems_fdisk_device_desc* dd, |
---|
| 810 | uint32_t page_size) |
---|
| 811 | { |
---|
| 812 | uint32_t count = 0; |
---|
| 813 | uint32_t s; |
---|
| 814 | for (s = 0; s < dd->segment_count; s++) |
---|
| 815 | { |
---|
| 816 | const rtems_fdisk_segment_desc* sd = &dd->segments[s]; |
---|
| 817 | count += |
---|
| 818 | (rtems_fdisk_pages_in_segment (sd, page_size) - |
---|
| 819 | rtems_fdisk_page_desc_pages (sd, page_size)) * sd->count; |
---|
| 820 | } |
---|
| 821 | return count; |
---|
| 822 | } |
---|
| 823 | |
---|
| 824 | /** |
---|
| 825 | * Read a block of data from a segment. |
---|
| 826 | */ |
---|
| 827 | static int |
---|
| 828 | rtems_fdisk_seg_read (const rtems_flashdisk* fd, |
---|
| 829 | uint32_t device, |
---|
| 830 | uint32_t segment, |
---|
| 831 | uint32_t offset, |
---|
| 832 | void* buffer, |
---|
| 833 | uint32_t size) |
---|
| 834 | { |
---|
| 835 | const rtems_fdisk_segment_desc* sd; |
---|
| 836 | const rtems_fdisk_driver_handlers* ops; |
---|
| 837 | sd = rtems_fdisk_seg_descriptor (fd, device, segment); |
---|
| 838 | ops = fd->devices[device].descriptor->flash_ops; |
---|
| 839 | #if RTEMS_FDISK_TRACE |
---|
| 840 | rtems_fdisk_printf (fd, " seg-read: %02d-%03d: o=%08x s=%d", |
---|
| 841 | device, segment, offset, size); |
---|
| 842 | #endif |
---|
| 843 | return ops->read (sd, device, segment, offset, buffer, size); |
---|
| 844 | } |
---|
| 845 | |
---|
| 846 | /** |
---|
| 847 | * Write a block of data to a segment. It is assumed the |
---|
| 848 | * location in the segment is erased and able to take the |
---|
| 849 | * data. |
---|
| 850 | */ |
---|
| 851 | static int |
---|
| 852 | rtems_fdisk_seg_write (const rtems_flashdisk* fd, |
---|
| 853 | uint32_t device, |
---|
| 854 | uint32_t segment, |
---|
| 855 | uint32_t offset, |
---|
| 856 | const void* buffer, |
---|
| 857 | uint32_t size) |
---|
| 858 | { |
---|
| 859 | const rtems_fdisk_segment_desc* sd; |
---|
| 860 | const rtems_fdisk_driver_handlers* ops; |
---|
| 861 | sd = rtems_fdisk_seg_descriptor (fd, device, segment); |
---|
| 862 | ops = fd->devices[device].descriptor->flash_ops; |
---|
| 863 | #if RTEMS_FDISK_TRACE |
---|
| 864 | rtems_fdisk_printf (fd, " seg-write: %02d-%03d: o=%08x s=%d", |
---|
| 865 | device, segment, offset, size); |
---|
| 866 | #endif |
---|
| 867 | return ops->write (sd, device, segment, offset, buffer, size); |
---|
| 868 | } |
---|
| 869 | |
---|
| 870 | /** |
---|
| 871 | * Blank check the area of a segment. |
---|
| 872 | */ |
---|
| 873 | static int |
---|
| 874 | rtems_fdisk_seg_blank_check (const rtems_flashdisk* fd, |
---|
| 875 | uint32_t device, |
---|
| 876 | uint32_t segment, |
---|
| 877 | uint32_t offset, |
---|
| 878 | uint32_t size) |
---|
| 879 | { |
---|
| 880 | const rtems_fdisk_segment_desc* sd; |
---|
| 881 | const rtems_fdisk_driver_handlers* ops; |
---|
| 882 | sd = rtems_fdisk_seg_descriptor (fd, device, segment); |
---|
| 883 | ops = fd->devices[device].descriptor->flash_ops; |
---|
| 884 | #if RTEMS_FDISK_TRACE |
---|
| 885 | rtems_fdisk_printf (fd, " seg-blank: %02d-%03d: o=%08x s=%d", |
---|
| 886 | device, segment, offset, size); |
---|
| 887 | #endif |
---|
| 888 | return ops->blank (sd, device, segment, offset, size); |
---|
| 889 | } |
---|
| 890 | /** |
---|
| 891 | * Verify the data with the data in a segment. |
---|
| 892 | */ |
---|
| 893 | static int |
---|
| 894 | rtems_fdisk_seg_verify (const rtems_flashdisk* fd, |
---|
| 895 | uint32_t device, |
---|
| 896 | uint32_t segment, |
---|
| 897 | uint32_t offset, |
---|
| 898 | const void* buffer, |
---|
| 899 | uint32_t size) |
---|
| 900 | { |
---|
| 901 | const rtems_fdisk_segment_desc* sd; |
---|
| 902 | const rtems_fdisk_driver_handlers* ops; |
---|
| 903 | sd = rtems_fdisk_seg_descriptor (fd, device, segment); |
---|
| 904 | ops = fd->devices[device].descriptor->flash_ops; |
---|
| 905 | #if RTEMS_FDISK_TRACE |
---|
| 906 | rtems_fdisk_printf (fd, " seg-verify: %02d-%03d: o=%08x s=%d", |
---|
| 907 | device, segment, offset, size); |
---|
| 908 | #endif |
---|
| 909 | return ops->verify (sd, device, segment, offset, buffer, size); |
---|
| 910 | } |
---|
| 911 | |
---|
| 912 | /** |
---|
| 913 | * Blank check a page of data in a segment. |
---|
| 914 | */ |
---|
| 915 | static int |
---|
| 916 | rtems_fdisk_seg_blank_check_page (const rtems_flashdisk* fd, |
---|
| 917 | uint32_t device, |
---|
| 918 | uint32_t segment, |
---|
| 919 | uint32_t page) |
---|
| 920 | { |
---|
| 921 | return rtems_fdisk_seg_blank_check (fd, device, segment, |
---|
| 922 | page * fd->block_size, fd->block_size); |
---|
| 923 | } |
---|
| 924 | |
---|
| 925 | /** |
---|
| 926 | * Read a page of data from a segment. |
---|
| 927 | */ |
---|
| 928 | static int |
---|
| 929 | rtems_fdisk_seg_read_page (const rtems_flashdisk* fd, |
---|
| 930 | uint32_t device, |
---|
| 931 | uint32_t segment, |
---|
| 932 | uint32_t page, |
---|
| 933 | void* buffer) |
---|
| 934 | { |
---|
| 935 | return rtems_fdisk_seg_read (fd, device, segment, |
---|
| 936 | page * fd->block_size, buffer, fd->block_size); |
---|
| 937 | } |
---|
| 938 | |
---|
| 939 | /** |
---|
| 940 | * Write a page of data to a segment. |
---|
| 941 | */ |
---|
| 942 | static int |
---|
| 943 | rtems_fdisk_seg_write_page (const rtems_flashdisk* fd, |
---|
| 944 | uint32_t device, |
---|
| 945 | uint32_t segment, |
---|
| 946 | uint32_t page, |
---|
| 947 | const void* buffer) |
---|
| 948 | { |
---|
| 949 | if ((fd->flags & RTEMS_FDISK_BLANK_CHECK_BEFORE_WRITE)) |
---|
| 950 | { |
---|
| 951 | int ret = rtems_fdisk_seg_blank_check_page (fd, device, segment, page); |
---|
| 952 | if (ret) |
---|
| 953 | return ret; |
---|
| 954 | } |
---|
| 955 | return rtems_fdisk_seg_write (fd, device, segment, |
---|
| 956 | page * fd->block_size, buffer, fd->block_size); |
---|
| 957 | } |
---|
| 958 | |
---|
| 959 | /** |
---|
| 960 | * Verify a page of data with the data in the segment. |
---|
| 961 | */ |
---|
| 962 | static int |
---|
| 963 | rtems_fdisk_seg_verify_page (const rtems_flashdisk* fd, |
---|
| 964 | uint32_t device, |
---|
| 965 | uint32_t segment, |
---|
| 966 | uint32_t page, |
---|
| 967 | const void* buffer) |
---|
| 968 | { |
---|
| 969 | return rtems_fdisk_seg_verify (fd, device, segment, |
---|
| 970 | page * fd->block_size, buffer, fd->block_size); |
---|
| 971 | } |
---|
| 972 | |
---|
| 973 | /** |
---|
| 974 | * Copy a page of data from one segment to another segment. |
---|
| 975 | */ |
---|
| 976 | static int |
---|
| 977 | rtems_fdisk_seg_copy_page (const rtems_flashdisk* fd, |
---|
| 978 | uint32_t src_device, |
---|
| 979 | uint32_t src_segment, |
---|
| 980 | uint32_t src_page, |
---|
| 981 | uint32_t dst_device, |
---|
| 982 | uint32_t dst_segment, |
---|
| 983 | uint32_t dst_page) |
---|
| 984 | { |
---|
| 985 | int ret; |
---|
| 986 | #if RTEMS_FDISK_TRACE |
---|
| 987 | rtems_fdisk_printf (fd, " seg-copy-page: %02d-%03d~%03d=>%02d-%03d~%03d", |
---|
| 988 | src_device, src_segment, src_page, |
---|
| 989 | dst_device, dst_segment, dst_page); |
---|
| 990 | #endif |
---|
| 991 | ret = rtems_fdisk_seg_read_page (fd, src_device, src_segment, src_page, |
---|
| 992 | fd->copy_buffer); |
---|
| 993 | if (ret) |
---|
| 994 | return ret; |
---|
| 995 | return rtems_fdisk_seg_write_page (fd, dst_device, dst_segment, dst_page, |
---|
| 996 | fd->copy_buffer); |
---|
| 997 | } |
---|
| 998 | |
---|
| 999 | /** |
---|
| 1000 | * Write the page descriptor to a segment. This code assumes the page |
---|
| 1001 | * descriptors are located at offset 0 in the segment. |
---|
| 1002 | */ |
---|
| 1003 | static int |
---|
| 1004 | rtems_fdisk_seg_write_page_desc (const rtems_flashdisk* fd, |
---|
| 1005 | uint32_t device, |
---|
| 1006 | uint32_t segment, |
---|
| 1007 | uint32_t page, |
---|
| 1008 | const rtems_fdisk_page_desc* page_desc) |
---|
| 1009 | { |
---|
| 1010 | uint32_t offset = page * sizeof (rtems_fdisk_page_desc); |
---|
| 1011 | if ((fd->flags & RTEMS_FDISK_BLANK_CHECK_BEFORE_WRITE)) |
---|
| 1012 | { |
---|
| 1013 | int ret = rtems_fdisk_seg_blank_check (fd, device, segment, |
---|
| 1014 | offset, |
---|
| 1015 | sizeof (rtems_fdisk_page_desc)); |
---|
| 1016 | if (ret) |
---|
| 1017 | return ret; |
---|
| 1018 | } |
---|
| 1019 | return rtems_fdisk_seg_write (fd, device, segment, offset, |
---|
| 1020 | page_desc, sizeof (rtems_fdisk_page_desc)); |
---|
| 1021 | } |
---|
| 1022 | |
---|
| 1023 | /** |
---|
| 1024 | * Write the page descriptor flags to a segment. This code assumes the page |
---|
| 1025 | * descriptors are located at offset 0 in the segment. |
---|
| 1026 | */ |
---|
| 1027 | static int |
---|
| 1028 | rtems_fdisk_seg_write_page_desc_flags (const rtems_flashdisk* fd, |
---|
| 1029 | uint32_t device, |
---|
| 1030 | uint32_t segment, |
---|
| 1031 | uint32_t page, |
---|
| 1032 | const rtems_fdisk_page_desc* page_desc) |
---|
| 1033 | { |
---|
| 1034 | uint32_t offset = ((page * sizeof (rtems_fdisk_page_desc)) + |
---|
| 1035 | ((uint8_t*) &page_desc->flags) - ((uint8_t*) page_desc)); |
---|
| 1036 | if ((fd->flags & RTEMS_FDISK_BLANK_CHECK_BEFORE_WRITE)) |
---|
| 1037 | { |
---|
| 1038 | uint16_t flash_flags; |
---|
| 1039 | int ret; |
---|
| 1040 | ret = rtems_fdisk_seg_read (fd, device, segment, offset, |
---|
| 1041 | &flash_flags, sizeof (flash_flags)); |
---|
| 1042 | if (ret) |
---|
| 1043 | return ret; |
---|
| 1044 | if ((flash_flags & page_desc->flags) != page_desc->flags) |
---|
| 1045 | { |
---|
| 1046 | rtems_fdisk_error (" seg-write-page-flags: %02d-%03d-%03d: " \ |
---|
| 1047 | "flags not erased: 0x%04 -> 0x%04x", |
---|
| 1048 | device, segment, page, flash_flags, page_desc->flags); |
---|
| 1049 | return ret; |
---|
| 1050 | } |
---|
| 1051 | } |
---|
| 1052 | return rtems_fdisk_seg_write (fd, device, segment, offset, |
---|
| 1053 | &page_desc->flags, sizeof (page_desc->flags)); |
---|
| 1054 | } |
---|
| 1055 | |
---|
| 1056 | /** |
---|
| 1057 | * Erase a segment. |
---|
| 1058 | */ |
---|
| 1059 | static int |
---|
| 1060 | rtems_fdisk_seg_erase (const rtems_flashdisk* fd, |
---|
| 1061 | uint32_t device, |
---|
| 1062 | uint32_t segment) |
---|
| 1063 | { |
---|
| 1064 | const rtems_fdisk_segment_desc* sd; |
---|
| 1065 | const rtems_fdisk_driver_handlers* ops; |
---|
| 1066 | sd = rtems_fdisk_seg_descriptor (fd, device, segment); |
---|
| 1067 | ops = fd->devices[device].descriptor->flash_ops; |
---|
| 1068 | #if RTEMS_FDISK_TRACE |
---|
| 1069 | rtems_fdisk_printf (fd, " seg-erase: %02d-%03d", device, segment); |
---|
| 1070 | #endif |
---|
| 1071 | return ops->erase (sd, device, segment); |
---|
| 1072 | } |
---|
| 1073 | |
---|
| 1074 | /** |
---|
| 1075 | * Erase a device. |
---|
| 1076 | */ |
---|
| 1077 | static int |
---|
| 1078 | rtems_fdisk_device_erase (const rtems_flashdisk* fd, uint32_t device) |
---|
| 1079 | { |
---|
| 1080 | const rtems_fdisk_driver_handlers* ops; |
---|
| 1081 | ops = fd->devices[device].descriptor->flash_ops; |
---|
| 1082 | #if RTEMS_FDISK_TRACE |
---|
| 1083 | rtems_fdisk_printf (fd, " device-erase: %02d", device); |
---|
| 1084 | #endif |
---|
| 1085 | return ops->erase_device (fd->devices[device].descriptor, device); |
---|
| 1086 | } |
---|
| 1087 | |
---|
| 1088 | /** |
---|
| 1089 | * Erase all flash. |
---|
| 1090 | */ |
---|
| 1091 | static int |
---|
| 1092 | rtems_fdisk_erase_flash (const rtems_flashdisk* fd) |
---|
| 1093 | { |
---|
| 1094 | uint32_t device; |
---|
| 1095 | for (device = 0; device < fd->device_count; device++) |
---|
| 1096 | { |
---|
| 1097 | int ret; |
---|
| 1098 | |
---|
| 1099 | #if RTEMS_FDISK_TRACE |
---|
| 1100 | rtems_fdisk_info (fd, " erase-flash:%02d", device); |
---|
| 1101 | #endif |
---|
| 1102 | |
---|
| 1103 | ret = rtems_fdisk_device_erase (fd, device); |
---|
| 1104 | |
---|
| 1105 | if (ret != 0) |
---|
| 1106 | return ret; |
---|
| 1107 | } |
---|
| 1108 | return 0; |
---|
| 1109 | } |
---|
| 1110 | |
---|
| 1111 | /** |
---|
| 1112 | * Calculate the checksum of a page in a segment. |
---|
| 1113 | */ |
---|
| 1114 | static uint16_t |
---|
| 1115 | rtems_fdisk_page_checksum (const uint8_t* buffer, uint32_t page_size) |
---|
| 1116 | { |
---|
| 1117 | uint16_t cs = 0xffff; |
---|
| 1118 | uint32_t i; |
---|
| 1119 | |
---|
| 1120 | for (i = 0; i < page_size; i++, buffer++) |
---|
| 1121 | cs = rtems_fdisk_calc_crc16 (cs, *buffer); |
---|
| 1122 | |
---|
| 1123 | return cs; |
---|
| 1124 | } |
---|
| 1125 | |
---|
| 1126 | /** |
---|
| 1127 | * Erase the segment. |
---|
| 1128 | */ |
---|
| 1129 | static int |
---|
| 1130 | rtems_fdisk_erase_segment (rtems_flashdisk* fd, rtems_fdisk_segment_ctl* sc) |
---|
| 1131 | { |
---|
| 1132 | int ret = rtems_fdisk_seg_erase (fd, sc->device, sc->segment); |
---|
| 1133 | if (ret) |
---|
| 1134 | { |
---|
| 1135 | rtems_fdisk_error (" erase-segment:%02d-%03d: " \ |
---|
| 1136 | "segment erase failed: %s (%d)", |
---|
| 1137 | sc->device, sc->segment, strerror (ret), ret); |
---|
[a5de1ef] | 1138 | sc->failed = true; |
---|
| 1139 | if (!rtems_fdisk_segment_queue_present (&fd->failed, sc)) |
---|
| 1140 | rtems_fdisk_segment_queue_push_tail (&fd->failed, sc); |
---|
[3c68c6c8] | 1141 | return ret; |
---|
| 1142 | } |
---|
| 1143 | |
---|
| 1144 | sc->erased++; |
---|
| 1145 | |
---|
| 1146 | memset (sc->page_descriptors, 0xff, sc->pages_desc * fd->block_size); |
---|
| 1147 | |
---|
| 1148 | sc->pages_active = 0; |
---|
| 1149 | sc->pages_used = 0; |
---|
| 1150 | sc->pages_bad = 0; |
---|
[a5de1ef] | 1151 | |
---|
| 1152 | sc->failed = false; |
---|
[3c68c6c8] | 1153 | |
---|
| 1154 | /* |
---|
| 1155 | * Push to the tail of the available queue. It is a very |
---|
| 1156 | * simple type of wear reduction. Every other available |
---|
| 1157 | * segment will now get a go. |
---|
| 1158 | */ |
---|
| 1159 | rtems_fdisk_segment_queue_push_tail (&fd->available, sc); |
---|
| 1160 | |
---|
| 1161 | return 0; |
---|
| 1162 | } |
---|
| 1163 | |
---|
| 1164 | /** |
---|
| 1165 | * Erase used segment. |
---|
| 1166 | */ |
---|
| 1167 | static int |
---|
| 1168 | rtems_fdisk_erase_used (rtems_flashdisk* fd) |
---|
| 1169 | { |
---|
| 1170 | rtems_fdisk_segment_ctl* sc; |
---|
| 1171 | int latched_ret = 0; |
---|
| 1172 | |
---|
| 1173 | while ((sc = rtems_fdisk_segment_queue_pop_head (&fd->erase))) |
---|
| 1174 | { |
---|
| 1175 | /* |
---|
| 1176 | * The segment will either end up on the available queue or |
---|
| 1177 | * the failed queue. |
---|
| 1178 | */ |
---|
| 1179 | int ret = rtems_fdisk_erase_segment (fd, sc); |
---|
| 1180 | if (ret && !latched_ret) |
---|
| 1181 | latched_ret = ret; |
---|
| 1182 | } |
---|
| 1183 | |
---|
| 1184 | return latched_ret; |
---|
| 1185 | } |
---|
| 1186 | |
---|
| 1187 | /** |
---|
| 1188 | * Queue a segment. This is done after some of the stats for the segment |
---|
| 1189 | * have been changed and this may effect the order the segment pages have in |
---|
| 1190 | * the queue of available pages. |
---|
| 1191 | * |
---|
| 1192 | * @param fd The flash disk control table. |
---|
| 1193 | * @param sc The segment control table to be reallocated |
---|
| 1194 | */ |
---|
| 1195 | static void |
---|
| 1196 | rtems_fdisk_queue_segment (rtems_flashdisk* fd, rtems_fdisk_segment_ctl* sc) |
---|
| 1197 | { |
---|
| 1198 | #if RTEMS_FDISK_TRACE |
---|
[a5de1ef] | 1199 | rtems_fdisk_info (fd, " queue-seg:%02d-%03d: p=%d a=%d u=%d b=%d f=%s n=%s", |
---|
[3c68c6c8] | 1200 | sc->device, sc->segment, |
---|
| 1201 | sc->pages, sc->pages_active, sc->pages_used, sc->pages_bad, |
---|
[a5de1ef] | 1202 | sc->failed ? "FAILED" : "no", sc->next ? "set" : "null"); |
---|
[3c68c6c8] | 1203 | #endif |
---|
| 1204 | |
---|
[a5de1ef] | 1205 | /* |
---|
| 1206 | * If the segment has failed then check the failed queue and append |
---|
| 1207 | * if not failed. |
---|
| 1208 | */ |
---|
| 1209 | if (sc->failed) |
---|
| 1210 | { |
---|
| 1211 | if (!rtems_fdisk_segment_queue_present (&fd->failed, sc)) |
---|
| 1212 | rtems_fdisk_segment_queue_push_tail (&fd->failed, sc); |
---|
| 1213 | return; |
---|
| 1214 | } |
---|
| 1215 | |
---|
[3c68c6c8] | 1216 | /* |
---|
| 1217 | * Remove the queue from the available or used queue. |
---|
| 1218 | */ |
---|
| 1219 | rtems_fdisk_segment_queue_remove (&fd->available, sc); |
---|
| 1220 | rtems_fdisk_segment_queue_remove (&fd->used, sc); |
---|
| 1221 | |
---|
| 1222 | /* |
---|
| 1223 | * Are all the pages in the segment used ? |
---|
| 1224 | * If they are and the driver has been configured to background |
---|
| 1225 | * erase place the segment on the used queue. If not configured |
---|
| 1226 | * to background erase perform the erase now. |
---|
| 1227 | * |
---|
| 1228 | */ |
---|
| 1229 | if (rtems_fdisk_seg_pages_available (sc) == 0) |
---|
| 1230 | { |
---|
| 1231 | if (sc->pages_active) |
---|
| 1232 | { |
---|
| 1233 | /* |
---|
[a5de1ef] | 1234 | * Keep the used queue sorted by the most number of used |
---|
| 1235 | * pages. When we compact we want to move the pages into |
---|
| 1236 | * a new segment and cover more than one segment. |
---|
[3c68c6c8] | 1237 | */ |
---|
| 1238 | rtems_fdisk_segment_ctl* seg = fd->used.head; |
---|
| 1239 | |
---|
| 1240 | while (seg) |
---|
| 1241 | { |
---|
| 1242 | if (sc->pages_used > seg->pages_used) |
---|
| 1243 | break; |
---|
| 1244 | seg = seg->next; |
---|
| 1245 | } |
---|
| 1246 | |
---|
| 1247 | if (seg) |
---|
| 1248 | rtems_fdisk_segment_queue_insert_before (&fd->used, seg, sc); |
---|
| 1249 | else |
---|
| 1250 | rtems_fdisk_segment_queue_push_tail (&fd->used, sc); |
---|
| 1251 | } |
---|
| 1252 | else |
---|
| 1253 | { |
---|
| 1254 | if ((fd->flags & RTEMS_FDISK_BACKGROUND_ERASE)) |
---|
| 1255 | rtems_fdisk_segment_queue_push_tail (&fd->erase, sc); |
---|
| 1256 | else |
---|
| 1257 | rtems_fdisk_erase_segment (fd, sc); |
---|
| 1258 | } |
---|
| 1259 | } |
---|
| 1260 | else |
---|
| 1261 | { |
---|
| 1262 | /* |
---|
| 1263 | * The segment has pages available so place back onto the |
---|
| 1264 | * available list. The list is sorted from the least number |
---|
| 1265 | * of available pages to the most. This approach means |
---|
| 1266 | * the pages of a partially filled segment will be filled |
---|
| 1267 | * before moving onto another emptier segment. This keeps |
---|
| 1268 | * empty segments longer aiding compaction. |
---|
| 1269 | * |
---|
| 1270 | * The down side is the wear effect as a single segment |
---|
| 1271 | * could be used more than segment. This will not be |
---|
| 1272 | * addressed until wear support is added. |
---|
| 1273 | * |
---|
| 1274 | * @note Wear support can be added by having counts for |
---|
| 1275 | * for the number of times a segment is erased. This |
---|
| 1276 | * available list is then sorted on the least number |
---|
| 1277 | * of available pages then empty segments are sorted |
---|
| 1278 | * on the least number of erases the segment has. |
---|
| 1279 | * |
---|
| 1280 | * The erase count can be stored in specially flaged |
---|
| 1281 | * pages and contain a counter (32bits?) and 32 bits |
---|
| 1282 | * for each segment. When a segment is erased a |
---|
| 1283 | * bit is cleared for that segment. When 32 erasers |
---|
| 1284 | * has occurred the page is re-written to the flash |
---|
| 1285 | * with all the counters updated with the number of |
---|
| 1286 | * bits cleared and all bits set back to 1. |
---|
| 1287 | */ |
---|
| 1288 | rtems_fdisk_segment_ctl* seg = fd->available.head; |
---|
| 1289 | |
---|
| 1290 | while (seg) |
---|
| 1291 | { |
---|
| 1292 | if (rtems_fdisk_seg_pages_available (sc) < |
---|
| 1293 | rtems_fdisk_seg_pages_available (seg)) |
---|
| 1294 | break; |
---|
| 1295 | seg = seg->next; |
---|
| 1296 | } |
---|
| 1297 | |
---|
| 1298 | if (seg) |
---|
| 1299 | rtems_fdisk_segment_queue_insert_before (&fd->available, seg, sc); |
---|
| 1300 | else |
---|
| 1301 | rtems_fdisk_segment_queue_push_tail (&fd->available, sc); |
---|
| 1302 | } |
---|
| 1303 | } |
---|
| 1304 | |
---|
| 1305 | /** |
---|
| 1306 | * Compact the used segments to free what is available. Find the segment |
---|
| 1307 | * with the most avalable number of pages and see if the we have |
---|
| 1308 | * used segments that will fit. The used queue is sorted on the least |
---|
| 1309 | * number active pages. |
---|
| 1310 | */ |
---|
| 1311 | static int |
---|
| 1312 | rtems_fdisk_compact (rtems_flashdisk* fd) |
---|
| 1313 | { |
---|
| 1314 | uint32_t compacted_segs = 0; |
---|
| 1315 | |
---|
| 1316 | while (fd->used.head) |
---|
| 1317 | { |
---|
| 1318 | rtems_fdisk_segment_ctl* dsc; |
---|
[a5de1ef] | 1319 | rtems_fdisk_segment_ctl* ssc; |
---|
| 1320 | uint32_t dst_pages; |
---|
| 1321 | uint32_t segments; |
---|
| 1322 | uint32_t pages; |
---|
[3c68c6c8] | 1323 | |
---|
[a5de1ef] | 1324 | #if RTEMS_FDISK_TRACE |
---|
| 1325 | rtems_fdisk_printf (fd, " compacting"); |
---|
| 1326 | #endif |
---|
| 1327 | |
---|
[3c68c6c8] | 1328 | dsc = rtems_fdisk_seg_most_available (&fd->available); |
---|
| 1329 | |
---|
[a5de1ef] | 1330 | if (dsc == 0) |
---|
[3c68c6c8] | 1331 | { |
---|
[a5de1ef] | 1332 | rtems_fdisk_error ("compacting: no available segments to compact too"); |
---|
| 1333 | return EIO; |
---|
| 1334 | } |
---|
| 1335 | |
---|
| 1336 | ssc = fd->used.head; |
---|
| 1337 | dst_pages = rtems_fdisk_seg_pages_available (dsc); |
---|
| 1338 | segments = 0; |
---|
| 1339 | pages = 0; |
---|
| 1340 | |
---|
[3c68c6c8] | 1341 | #if RTEMS_FDISK_TRACE |
---|
[a5de1ef] | 1342 | rtems_fdisk_printf (fd, " dsc:%02d-%03d: most available", |
---|
| 1343 | dsc->device, dsc->segment); |
---|
[3c68c6c8] | 1344 | #endif |
---|
| 1345 | |
---|
[a5de1ef] | 1346 | /* |
---|
| 1347 | * Count the number of segments that have active pages that fit into |
---|
| 1348 | * the destination segment. Also limit the number of segments that |
---|
| 1349 | * we handle during one compaction. A lower number means less aggressive |
---|
| 1350 | * compaction or less delay when compacting but it may mean the disk |
---|
| 1351 | * will fill. |
---|
| 1352 | */ |
---|
[3c68c6c8] | 1353 | |
---|
[a5de1ef] | 1354 | while (ssc && |
---|
| 1355 | ((pages + ssc->pages_active) < dst_pages) && |
---|
| 1356 | ((compacted_segs + segments) < fd->compact_segs)) |
---|
| 1357 | { |
---|
| 1358 | pages += ssc->pages_active; |
---|
| 1359 | segments++; |
---|
| 1360 | ssc = ssc->next; |
---|
| 1361 | } |
---|
[3c68c6c8] | 1362 | |
---|
[a5de1ef] | 1363 | /* |
---|
| 1364 | * We need a source segment and have pages to copy and |
---|
| 1365 | * compacting one segment to another is silly. Compaction needs |
---|
| 1366 | * to free at least one more segment. |
---|
| 1367 | */ |
---|
[3c68c6c8] | 1368 | |
---|
[a5de1ef] | 1369 | if (!ssc || (pages == 0) || ((compacted_segs + segments) == 1)) |
---|
| 1370 | break; |
---|
[3c68c6c8] | 1371 | |
---|
| 1372 | #if RTEMS_FDISK_TRACE |
---|
[a5de1ef] | 1373 | rtems_fdisk_printf (fd, " ssc scan: %d-%d: p=%ld, seg=%ld", |
---|
| 1374 | ssc->device, ssc->segment, |
---|
| 1375 | pages, segments); |
---|
[3c68c6c8] | 1376 | #endif |
---|
| 1377 | |
---|
[a5de1ef] | 1378 | rtems_fdisk_segment_queue_remove (&fd->available, dsc); |
---|
[3c68c6c8] | 1379 | |
---|
[a5de1ef] | 1380 | /* |
---|
| 1381 | * We now copy the pages to the new segment. |
---|
| 1382 | */ |
---|
[3c68c6c8] | 1383 | |
---|
[a5de1ef] | 1384 | while (pages) |
---|
| 1385 | { |
---|
| 1386 | uint32_t spage; |
---|
| 1387 | int ret; |
---|
[3c68c6c8] | 1388 | |
---|
[a5de1ef] | 1389 | ssc = rtems_fdisk_segment_queue_pop_head (&fd->used); |
---|
[3c68c6c8] | 1390 | |
---|
[a5de1ef] | 1391 | if (ssc) |
---|
| 1392 | { |
---|
| 1393 | uint32_t used = 0; |
---|
| 1394 | uint32_t active = 0; |
---|
| 1395 | for (spage = 0; spage < ssc->pages; spage++) |
---|
[3c68c6c8] | 1396 | { |
---|
[a5de1ef] | 1397 | rtems_fdisk_page_desc* spd = &ssc->page_descriptors[spage]; |
---|
[3c68c6c8] | 1398 | |
---|
[a5de1ef] | 1399 | if (rtems_fdisk_page_desc_flags_set (spd, RTEMS_FDISK_PAGE_ACTIVE) && |
---|
| 1400 | !rtems_fdisk_page_desc_flags_set (spd, RTEMS_FDISK_PAGE_USED)) |
---|
| 1401 | { |
---|
| 1402 | rtems_fdisk_page_desc* dpd; |
---|
| 1403 | uint32_t dpage; |
---|
[3c68c6c8] | 1404 | |
---|
[a5de1ef] | 1405 | dpage = rtems_fdisk_seg_next_available_page (dsc); |
---|
| 1406 | dpd = &dsc->page_descriptors[dpage]; |
---|
[3c68c6c8] | 1407 | |
---|
[a5de1ef] | 1408 | active++; |
---|
[3c68c6c8] | 1409 | |
---|
[a5de1ef] | 1410 | if (dpage >= dsc->pages) |
---|
| 1411 | { |
---|
| 1412 | rtems_fdisk_error ("compacting: %02d-%03d: " \ |
---|
| 1413 | "no page desc available: %d", |
---|
| 1414 | dsc->device, dsc->segment, |
---|
| 1415 | rtems_fdisk_seg_pages_available (dsc)); |
---|
| 1416 | dsc->failed = true; |
---|
| 1417 | rtems_fdisk_queue_segment (fd, dsc); |
---|
| 1418 | rtems_fdisk_segment_queue_push_head (&fd->used, ssc); |
---|
| 1419 | return EIO; |
---|
| 1420 | } |
---|
[3c68c6c8] | 1421 | |
---|
| 1422 | #if RTEMS_FDISK_TRACE |
---|
[a5de1ef] | 1423 | rtems_fdisk_info (fd, "compacting: %02d-%03d-%03d=>%02d-%03d-%03d", |
---|
| 1424 | ssc->device, ssc->segment, spage, |
---|
| 1425 | dsc->device, dsc->segment, dpage); |
---|
[3c68c6c8] | 1426 | #endif |
---|
[a5de1ef] | 1427 | ret = rtems_fdisk_seg_copy_page (fd, ssc->device, ssc->segment, |
---|
| 1428 | spage + ssc->pages_desc, |
---|
| 1429 | dsc->device, dsc->segment, |
---|
| 1430 | dpage + dsc->pages_desc); |
---|
| 1431 | if (ret) |
---|
| 1432 | { |
---|
| 1433 | rtems_fdisk_error ("compacting: %02d-%03d-%03d=>" \ |
---|
| 1434 | "%02d-%03d-%03d: " \ |
---|
| 1435 | "copy page failed: %s (%d)", |
---|
| 1436 | ssc->device, ssc->segment, spage, |
---|
| 1437 | dsc->device, dsc->segment, dpage, |
---|
| 1438 | strerror (ret), ret); |
---|
| 1439 | dsc->failed = true; |
---|
| 1440 | rtems_fdisk_queue_segment (fd, dsc); |
---|
| 1441 | rtems_fdisk_segment_queue_push_head (&fd->used, ssc); |
---|
| 1442 | return ret; |
---|
| 1443 | } |
---|
[3c68c6c8] | 1444 | |
---|
[a5de1ef] | 1445 | *dpd = *spd; |
---|
| 1446 | |
---|
| 1447 | ret = rtems_fdisk_seg_write_page_desc (fd, |
---|
| 1448 | dsc->device, dsc->segment, |
---|
| 1449 | dpage, dpd); |
---|
| 1450 | |
---|
| 1451 | if (ret) |
---|
| 1452 | { |
---|
| 1453 | rtems_fdisk_error ("compacting: %02d-%03d-%03d=>" \ |
---|
| 1454 | "%02d-%03d-%03d: copy pd failed: %s (%d)", |
---|
| 1455 | ssc->device, ssc->segment, spage, |
---|
| 1456 | dsc->device, dsc->segment, dpage, |
---|
| 1457 | strerror (ret), ret); |
---|
| 1458 | dsc->failed = true; |
---|
| 1459 | rtems_fdisk_queue_segment (fd, dsc); |
---|
| 1460 | rtems_fdisk_segment_queue_push_head (&fd->used, ssc); |
---|
| 1461 | return ret; |
---|
| 1462 | } |
---|
| 1463 | |
---|
| 1464 | dsc->pages_active++; |
---|
| 1465 | |
---|
| 1466 | /* |
---|
| 1467 | * No need to set the used bit on the source page as the |
---|
| 1468 | * segment will be erased. Power down could be a problem. |
---|
| 1469 | * We do the stats to make sure everything is as it should |
---|
| 1470 | * be. |
---|
| 1471 | */ |
---|
[3c68c6c8] | 1472 | |
---|
[a5de1ef] | 1473 | ssc->pages_active--; |
---|
| 1474 | ssc->pages_used++; |
---|
[3c68c6c8] | 1475 | |
---|
[a5de1ef] | 1476 | fd->blocks[spd->block].segment = dsc; |
---|
| 1477 | fd->blocks[spd->block].page = dpage; |
---|
[3c68c6c8] | 1478 | |
---|
[a5de1ef] | 1479 | /* |
---|
| 1480 | * Place the segment on to the correct queue. |
---|
| 1481 | */ |
---|
| 1482 | rtems_fdisk_queue_segment (fd, dsc); |
---|
[3c68c6c8] | 1483 | |
---|
[a5de1ef] | 1484 | pages--; |
---|
[3c68c6c8] | 1485 | } |
---|
[a5de1ef] | 1486 | else |
---|
| 1487 | used++; |
---|
| 1488 | } |
---|
[3c68c6c8] | 1489 | |
---|
| 1490 | #if RTEMS_FDISK_TRACE |
---|
[a5de1ef] | 1491 | rtems_fdisk_printf (fd, "ssc end: %d-%d: p=%ld, a=%ld, u=%ld", |
---|
| 1492 | ssc->device, ssc->segment, |
---|
| 1493 | pages, active, used); |
---|
[3c68c6c8] | 1494 | #endif |
---|
[a5de1ef] | 1495 | if (ssc->pages_active != 0) |
---|
| 1496 | { |
---|
| 1497 | rtems_fdisk_error ("compacting: ssc pages not 0: %d", |
---|
| 1498 | ssc->pages_active); |
---|
| 1499 | } |
---|
[3c68c6c8] | 1500 | |
---|
[a5de1ef] | 1501 | ret = rtems_fdisk_erase_segment (fd, ssc); |
---|
[3c68c6c8] | 1502 | |
---|
[a5de1ef] | 1503 | if (ret) |
---|
| 1504 | return ret; |
---|
[3c68c6c8] | 1505 | } |
---|
| 1506 | } |
---|
[a5de1ef] | 1507 | |
---|
| 1508 | compacted_segs += segments; |
---|
[3c68c6c8] | 1509 | } |
---|
| 1510 | |
---|
| 1511 | return 0; |
---|
| 1512 | } |
---|
| 1513 | |
---|
| 1514 | /** |
---|
| 1515 | * Recover the block mappings from the devices. |
---|
| 1516 | */ |
---|
| 1517 | static int |
---|
| 1518 | rtems_fdisk_recover_block_mappings (rtems_flashdisk* fd) |
---|
| 1519 | { |
---|
| 1520 | uint32_t device; |
---|
| 1521 | |
---|
| 1522 | /* |
---|
| 1523 | * Clear the queues. |
---|
| 1524 | */ |
---|
| 1525 | rtems_fdisk_segment_queue_init (&fd->available); |
---|
| 1526 | rtems_fdisk_segment_queue_init (&fd->used); |
---|
| 1527 | rtems_fdisk_segment_queue_init (&fd->erase); |
---|
| 1528 | rtems_fdisk_segment_queue_init (&fd->failed); |
---|
| 1529 | |
---|
| 1530 | /* |
---|
| 1531 | * Clear the lock mappings. |
---|
| 1532 | */ |
---|
| 1533 | memset (fd->blocks, 0, fd->block_count * sizeof (rtems_fdisk_block_ctl)); |
---|
| 1534 | |
---|
| 1535 | /* |
---|
| 1536 | * Scan each segment or each device recovering the valid pages. |
---|
| 1537 | */ |
---|
| 1538 | for (device = 0; device < fd->device_count; device++) |
---|
| 1539 | { |
---|
| 1540 | uint32_t segment; |
---|
| 1541 | for (segment = 0; segment < fd->devices[device].segment_count; segment++) |
---|
| 1542 | { |
---|
| 1543 | rtems_fdisk_segment_ctl* sc = &fd->devices[device].segments[segment]; |
---|
| 1544 | const rtems_fdisk_segment_desc* sd = sc->descriptor; |
---|
| 1545 | rtems_fdisk_page_desc* pd; |
---|
| 1546 | uint32_t page; |
---|
| 1547 | int ret; |
---|
| 1548 | |
---|
| 1549 | #if RTEMS_FDISK_TRACE |
---|
| 1550 | rtems_fdisk_info (fd, "recover-block-mappings:%02d-%03d", device, segment); |
---|
| 1551 | #endif |
---|
| 1552 | |
---|
| 1553 | sc->pages_desc = rtems_fdisk_page_desc_pages (sd, fd->block_size); |
---|
| 1554 | sc->pages = |
---|
| 1555 | rtems_fdisk_pages_in_segment (sd, fd->block_size) - sc->pages_desc; |
---|
| 1556 | |
---|
| 1557 | sc->pages_active = 0; |
---|
| 1558 | sc->pages_used = 0; |
---|
| 1559 | sc->pages_bad = 0; |
---|
[a5de1ef] | 1560 | |
---|
| 1561 | sc->failed = false; |
---|
| 1562 | |
---|
[3c68c6c8] | 1563 | if (!sc->page_descriptors) |
---|
| 1564 | sc->page_descriptors = malloc (sc->pages_desc * fd->block_size); |
---|
| 1565 | |
---|
| 1566 | if (!sc->page_descriptors) |
---|
| 1567 | rtems_fdisk_abort ("no memory for page descriptors"); |
---|
| 1568 | |
---|
| 1569 | pd = sc->page_descriptors; |
---|
| 1570 | |
---|
| 1571 | /* |
---|
| 1572 | * The page descriptors are always at the start of the segment. Read |
---|
| 1573 | * the descriptors off the device into the segment control page |
---|
| 1574 | * descriptors. |
---|
| 1575 | * |
---|
| 1576 | * @todo It may be better to ask the driver to get these value |
---|
| 1577 | * so NAND flash could be better supported. |
---|
| 1578 | */ |
---|
| 1579 | ret = rtems_fdisk_seg_read (fd, device, segment, 0, (void*) pd, |
---|
| 1580 | sc->pages_desc * fd->block_size); |
---|
| 1581 | |
---|
| 1582 | if (ret) |
---|
| 1583 | { |
---|
| 1584 | rtems_fdisk_error ("recover-block-mappings:%02d-%03d: " \ |
---|
| 1585 | "read page desc failed: %s (%d)", |
---|
| 1586 | device, segment, strerror (ret), ret); |
---|
| 1587 | return ret; |
---|
| 1588 | } |
---|
| 1589 | |
---|
| 1590 | /* |
---|
| 1591 | * Check each page in the segement for valid pages. |
---|
| 1592 | * Update the stats for the segment so we know how many pages |
---|
| 1593 | * are active and how many are used. |
---|
| 1594 | * |
---|
| 1595 | * If the page is active see if the block is with-in range and |
---|
| 1596 | * if the block is a duplicate. |
---|
| 1597 | */ |
---|
| 1598 | for (page = 0; page < sc->pages; page++, pd++) |
---|
| 1599 | { |
---|
| 1600 | if (rtems_fdisk_page_desc_erased (pd)) |
---|
| 1601 | { |
---|
| 1602 | /* |
---|
| 1603 | * Is the page erased ? |
---|
| 1604 | */ |
---|
| 1605 | ret = rtems_fdisk_seg_blank_check_page (fd, device, segment, |
---|
| 1606 | page + sc->pages_desc); |
---|
| 1607 | |
---|
| 1608 | if (ret) |
---|
| 1609 | { |
---|
| 1610 | #if RTEMS_FDISK_TRACE |
---|
| 1611 | rtems_fdisk_warning (fd, "page not blank: %d-%d-%d", |
---|
| 1612 | device, segment, page, pd->block); |
---|
| 1613 | #endif |
---|
| 1614 | rtems_fdisk_page_desc_set_flags (pd, RTEMS_FDISK_PAGE_USED); |
---|
| 1615 | |
---|
| 1616 | ret = rtems_fdisk_seg_write_page_desc (fd, device, segment, |
---|
| 1617 | page, pd); |
---|
| 1618 | |
---|
| 1619 | if (ret) |
---|
[a5de1ef] | 1620 | { |
---|
[3c68c6c8] | 1621 | rtems_fdisk_error ("forcing page to used failed: %d-%d-%d", |
---|
| 1622 | device, segment, page); |
---|
[a5de1ef] | 1623 | sc->failed = true; |
---|
| 1624 | } |
---|
[3c68c6c8] | 1625 | |
---|
| 1626 | sc->pages_used++; |
---|
| 1627 | } |
---|
| 1628 | } |
---|
| 1629 | else |
---|
| 1630 | { |
---|
| 1631 | if (rtems_fdisk_page_desc_flags_set (pd, RTEMS_FDISK_PAGE_USED)) |
---|
| 1632 | { |
---|
| 1633 | sc->pages_used++; |
---|
| 1634 | } |
---|
| 1635 | else if (rtems_fdisk_page_desc_flags_set (pd, RTEMS_FDISK_PAGE_ACTIVE)) |
---|
| 1636 | { |
---|
| 1637 | if (pd->block >= fd->block_count) |
---|
| 1638 | { |
---|
| 1639 | #if RTEMS_FDISK_TRACE |
---|
| 1640 | rtems_fdisk_warning (fd, |
---|
| 1641 | "invalid block number: %d-%d-%d: block: %d", |
---|
| 1642 | device, segment, page, pd->block); |
---|
| 1643 | #endif |
---|
| 1644 | sc->pages_bad++; |
---|
| 1645 | } |
---|
| 1646 | else if (fd->blocks[pd->block].segment) |
---|
| 1647 | { |
---|
| 1648 | /** |
---|
| 1649 | * @todo |
---|
| 1650 | * This may need more work later. Maybe a counter is stored with |
---|
| 1651 | * each block so we can tell which is the later block when |
---|
| 1652 | * duplicates appear. A power down with a failed wirte could cause |
---|
| 1653 | * a duplicate. |
---|
| 1654 | */ |
---|
| 1655 | const rtems_fdisk_segment_ctl* bsc = fd->blocks[pd->block].segment; |
---|
| 1656 | rtems_fdisk_error ("duplicate block: %d-%d-%d: " \ |
---|
| 1657 | "duplicate: %d-%d-%d", |
---|
| 1658 | bsc->device, bsc->segment, |
---|
| 1659 | fd->blocks[pd->block].page, |
---|
| 1660 | device, segment, page); |
---|
| 1661 | sc->pages_bad++; |
---|
| 1662 | } |
---|
| 1663 | else |
---|
| 1664 | { |
---|
| 1665 | /** |
---|
| 1666 | * @todo |
---|
| 1667 | * Add start up crc checks here. |
---|
| 1668 | */ |
---|
| 1669 | fd->blocks[pd->block].segment = sc; |
---|
| 1670 | fd->blocks[pd->block].page = page; |
---|
| 1671 | |
---|
| 1672 | /* |
---|
| 1673 | * The page is active. |
---|
| 1674 | */ |
---|
| 1675 | sc->pages_active++; |
---|
| 1676 | } |
---|
| 1677 | } |
---|
| 1678 | else |
---|
| 1679 | sc->pages_bad++; |
---|
| 1680 | } |
---|
| 1681 | } |
---|
| 1682 | |
---|
| 1683 | /* |
---|
| 1684 | * Place the segment on to the correct queue. |
---|
| 1685 | */ |
---|
| 1686 | rtems_fdisk_queue_segment (fd, sc); |
---|
| 1687 | } |
---|
| 1688 | } |
---|
| 1689 | |
---|
| 1690 | return 0; |
---|
| 1691 | } |
---|
| 1692 | |
---|
| 1693 | /** |
---|
| 1694 | * Read a block. The block is checked to see if the page referenced |
---|
| 1695 | * is valid and the page has a valid crc. |
---|
| 1696 | * |
---|
| 1697 | * @param fd The rtems_flashdisk control table. |
---|
| 1698 | * @param block The block number to read. |
---|
| 1699 | * @param buffer The buffer to write the data into. |
---|
| 1700 | * @return 0 No error. |
---|
| 1701 | * @return EIO Invalid block size, block number, segment pointer, crc, |
---|
| 1702 | * page flags. |
---|
| 1703 | */ |
---|
| 1704 | static int |
---|
| 1705 | rtems_fdisk_read_block (rtems_flashdisk* fd, |
---|
| 1706 | uint32_t block, |
---|
| 1707 | uint8_t* buffer) |
---|
| 1708 | { |
---|
| 1709 | rtems_fdisk_block_ctl* bc; |
---|
| 1710 | rtems_fdisk_segment_ctl* sc; |
---|
| 1711 | rtems_fdisk_page_desc* pd; |
---|
| 1712 | |
---|
[a5de1ef] | 1713 | #if RTEMS_FDISK_TRACE |
---|
| 1714 | rtems_fdisk_info (fd, "read-block:%d", block); |
---|
| 1715 | #endif |
---|
| 1716 | |
---|
[3c68c6c8] | 1717 | /* |
---|
| 1718 | * Broken out to allow info messages when testing. |
---|
| 1719 | */ |
---|
| 1720 | |
---|
[a5de1ef] | 1721 | if (block >= (fd->block_count - fd->unavail_blocks)) |
---|
[3c68c6c8] | 1722 | { |
---|
[a5de1ef] | 1723 | rtems_fdisk_error ("read-block: block out of range: %d", block); |
---|
[3c68c6c8] | 1724 | return EIO; |
---|
| 1725 | } |
---|
| 1726 | |
---|
| 1727 | bc = &fd->blocks[block]; |
---|
| 1728 | |
---|
| 1729 | if (!bc->segment) |
---|
| 1730 | { |
---|
| 1731 | #if RTEMS_FDISK_TRACE |
---|
| 1732 | rtems_fdisk_info (fd, "read-block: no segment mapping: %d", block); |
---|
| 1733 | #endif |
---|
| 1734 | memset (buffer, fd->block_size, 0xff); |
---|
| 1735 | return 0; |
---|
| 1736 | } |
---|
| 1737 | |
---|
| 1738 | sc = fd->blocks[block].segment; |
---|
| 1739 | pd = &sc->page_descriptors[bc->page]; |
---|
| 1740 | |
---|
| 1741 | #if RTEMS_FDISK_TRACE |
---|
| 1742 | rtems_fdisk_info (fd, |
---|
[a5de1ef] | 1743 | " read:%d=>%02d-%03d-%03d: p=%d a=%d u=%d b=%d n=%s: " \ |
---|
[3c68c6c8] | 1744 | "f=%04x c=%04x b=%d", |
---|
| 1745 | block, sc->device, sc->segment, bc->page, |
---|
| 1746 | sc->pages, sc->pages_active, sc->pages_used, sc->pages_bad, |
---|
| 1747 | sc->next ? "set" : "null", |
---|
| 1748 | pd->flags, pd->crc, pd->block); |
---|
| 1749 | #endif |
---|
| 1750 | |
---|
| 1751 | if (rtems_fdisk_page_desc_flags_set (pd, RTEMS_FDISK_PAGE_ACTIVE)) |
---|
| 1752 | { |
---|
| 1753 | if (rtems_fdisk_page_desc_flags_clear (pd, RTEMS_FDISK_PAGE_USED)) |
---|
| 1754 | { |
---|
| 1755 | uint16_t cs; |
---|
| 1756 | |
---|
| 1757 | /* |
---|
| 1758 | * We use the segment page offset not the page number used in the |
---|
| 1759 | * driver. This skips the page descriptors. |
---|
| 1760 | */ |
---|
| 1761 | int ret = rtems_fdisk_seg_read_page (fd, sc->device, sc->segment, |
---|
| 1762 | bc->page + sc->pages_desc, buffer); |
---|
| 1763 | |
---|
| 1764 | if (ret) |
---|
| 1765 | { |
---|
| 1766 | #if RTEMS_FDISK_TRACE |
---|
| 1767 | rtems_fdisk_info (fd, |
---|
| 1768 | "read-block:%02d-%03d-%03d: read page failed: %s (%d)", |
---|
| 1769 | sc->device, sc->segment, bc->page, |
---|
| 1770 | strerror (ret), ret); |
---|
| 1771 | #endif |
---|
| 1772 | return ret; |
---|
| 1773 | } |
---|
| 1774 | |
---|
| 1775 | cs = rtems_fdisk_page_checksum (buffer, fd->block_size); |
---|
| 1776 | |
---|
| 1777 | if (cs == pd->crc) |
---|
| 1778 | return 0; |
---|
| 1779 | |
---|
| 1780 | rtems_fdisk_error ("read-block: crc failure: %d: buffer:%04x page:%04x", |
---|
| 1781 | block, cs, pd->crc); |
---|
| 1782 | } |
---|
| 1783 | else |
---|
| 1784 | { |
---|
| 1785 | rtems_fdisk_error ("read-block: block points to used page: %d: %d-%d-%d", |
---|
| 1786 | block, sc->device, sc->segment, bc->page); |
---|
| 1787 | } |
---|
| 1788 | } |
---|
| 1789 | else |
---|
| 1790 | { |
---|
| 1791 | rtems_fdisk_error ("read-block: block page not active: %d: %d-%d-%d", |
---|
| 1792 | block, sc->device, sc->segment, bc->page); |
---|
| 1793 | } |
---|
| 1794 | |
---|
| 1795 | return EIO; |
---|
| 1796 | } |
---|
| 1797 | |
---|
| 1798 | /** |
---|
| 1799 | * Write a block. The block: |
---|
| 1800 | * |
---|
| 1801 | * # May never have existed in flash before this write. |
---|
| 1802 | * # Exists and needs to be moved to a new page. |
---|
| 1803 | * |
---|
| 1804 | * If the block does not exist in flash we need to get the next |
---|
| 1805 | * segment available to place the page into. The segments with |
---|
| 1806 | * available pages are held on the avaliable list sorted on least |
---|
| 1807 | * number of available pages as the primary key. Currently there |
---|
| 1808 | * is no secondary key. Empty segments are at the end of the list. |
---|
| 1809 | * |
---|
| 1810 | * If the block already exists we need to set the USED bit in the |
---|
| 1811 | * current page's flags. This is a single byte which changes a 1 to |
---|
| 1812 | * a 0 and can be done with a single 16 bit write. The driver for |
---|
| 1813 | * 8 bit devices should only attempt the write on the changed bit. |
---|
| 1814 | * |
---|
| 1815 | * @param fd The rtems_flashdisk control table. |
---|
| 1816 | * @param block The block number to read. |
---|
| 1817 | * @param block_size The size of the block. Must match what we have. |
---|
| 1818 | * @param buffer The buffer to write the data into. |
---|
| 1819 | * @return 0 No error. |
---|
| 1820 | * @return EIO Invalid block size, block number, segment pointer, crc, |
---|
| 1821 | * page flags. |
---|
| 1822 | */ |
---|
| 1823 | static int |
---|
| 1824 | rtems_fdisk_write_block (rtems_flashdisk* fd, |
---|
| 1825 | uint32_t block, |
---|
| 1826 | const uint8_t* buffer) |
---|
| 1827 | { |
---|
| 1828 | rtems_fdisk_block_ctl* bc; |
---|
| 1829 | rtems_fdisk_segment_ctl* sc; |
---|
| 1830 | rtems_fdisk_page_desc* pd; |
---|
| 1831 | uint32_t page; |
---|
| 1832 | int ret; |
---|
| 1833 | |
---|
[a5de1ef] | 1834 | #if RTEMS_FDISK_TRACE |
---|
| 1835 | rtems_fdisk_info (fd, "write-block:%d", block); |
---|
| 1836 | #endif |
---|
[3c68c6c8] | 1837 | |
---|
| 1838 | /* |
---|
| 1839 | * Broken out to allow info messages when testing. |
---|
| 1840 | */ |
---|
| 1841 | |
---|
[a5de1ef] | 1842 | if (block >= (fd->block_count - fd->unavail_blocks)) |
---|
[3c68c6c8] | 1843 | { |
---|
[a5de1ef] | 1844 | rtems_fdisk_error ("write-block: block out of range: %d", block); |
---|
[3c68c6c8] | 1845 | return EIO; |
---|
| 1846 | } |
---|
| 1847 | |
---|
| 1848 | bc = &fd->blocks[block]; |
---|
| 1849 | |
---|
| 1850 | /* |
---|
| 1851 | * Does the page exist in flash ? |
---|
| 1852 | */ |
---|
| 1853 | if (bc->segment) |
---|
| 1854 | { |
---|
| 1855 | sc = bc->segment; |
---|
| 1856 | pd = &sc->page_descriptors[bc->page]; |
---|
| 1857 | |
---|
[a5de1ef] | 1858 | #if RTEMS_FDISK_TRACE |
---|
| 1859 | rtems_fdisk_info (fd, " write:%02d-%03d-%03d: flag used", |
---|
| 1860 | sc->device, sc->segment, bc->page); |
---|
| 1861 | #endif |
---|
| 1862 | |
---|
[3c68c6c8] | 1863 | /* |
---|
| 1864 | * The page exists in flash so see if the page has been changed. |
---|
| 1865 | */ |
---|
| 1866 | if (rtems_fdisk_seg_verify_page (fd, sc->device, sc->segment, |
---|
| 1867 | bc->page + sc->pages_desc, buffer) == 0) |
---|
| 1868 | { |
---|
| 1869 | #if RTEMS_FDISK_TRACE |
---|
| 1870 | rtems_fdisk_info (fd, "write-block:%d=>%02d-%03d-%03d: page verified", |
---|
| 1871 | block, sc->device, sc->segment, bc->page); |
---|
| 1872 | #endif |
---|
| 1873 | return 0; |
---|
| 1874 | } |
---|
| 1875 | |
---|
| 1876 | /* |
---|
| 1877 | * The page exists in flash so we need to set the used flag |
---|
| 1878 | * in the page descriptor. The descriptor is in memory with the |
---|
| 1879 | * segment control block. We can assume this memory copy |
---|
| 1880 | * matches the flash device. |
---|
| 1881 | */ |
---|
| 1882 | |
---|
| 1883 | rtems_fdisk_page_desc_set_flags (pd, RTEMS_FDISK_PAGE_USED); |
---|
| 1884 | |
---|
| 1885 | ret = rtems_fdisk_seg_write_page_desc_flags (fd, sc->device, sc->segment, |
---|
| 1886 | bc->page, pd); |
---|
| 1887 | |
---|
| 1888 | if (ret) |
---|
| 1889 | { |
---|
| 1890 | #if RTEMS_FDISK_TRACE |
---|
[a5de1ef] | 1891 | rtems_fdisk_info (fd, " write:%02d-%03d-%03d: " \ |
---|
[3c68c6c8] | 1892 | "write used page desc failed: %s (%d)", |
---|
| 1893 | sc->device, sc->segment, bc->page, |
---|
| 1894 | strerror (ret), ret); |
---|
| 1895 | #endif |
---|
[a5de1ef] | 1896 | sc->failed = true; |
---|
[3c68c6c8] | 1897 | } |
---|
[a5de1ef] | 1898 | else |
---|
| 1899 | { |
---|
| 1900 | sc->pages_active--; |
---|
| 1901 | sc->pages_used++; |
---|
| 1902 | } |
---|
| 1903 | |
---|
[3c68c6c8] | 1904 | /* |
---|
| 1905 | * If possible reuse this segment. This will mean the segment |
---|
| 1906 | * needs to be removed from the available list and placed |
---|
| 1907 | * back if space is still available. |
---|
| 1908 | */ |
---|
| 1909 | rtems_fdisk_queue_segment (fd, sc); |
---|
| 1910 | |
---|
| 1911 | /* |
---|
| 1912 | * If no background compacting then compact in the forground. |
---|
| 1913 | * If we compact we ignore the error as there is little we |
---|
| 1914 | * can do from here. The write may will work. |
---|
| 1915 | */ |
---|
| 1916 | if ((fd->flags & RTEMS_FDISK_BACKGROUND_COMPACT) == 0) |
---|
| 1917 | rtems_fdisk_compact (fd); |
---|
| 1918 | } |
---|
| 1919 | |
---|
[a5de1ef] | 1920 | /* |
---|
| 1921 | * Is it time to compact the disk ? |
---|
| 1922 | * |
---|
| 1923 | * We override the background compaction configruation. |
---|
| 1924 | */ |
---|
| 1925 | if (rtems_fdisk_segment_count_queue (&fd->available) <= |
---|
| 1926 | fd->avail_compact_segs) |
---|
| 1927 | rtems_fdisk_compact (fd); |
---|
| 1928 | |
---|
[3c68c6c8] | 1929 | /* |
---|
| 1930 | * Get the next avaliable segment. |
---|
| 1931 | */ |
---|
| 1932 | sc = rtems_fdisk_segment_queue_pop_head (&fd->available); |
---|
| 1933 | |
---|
| 1934 | /* |
---|
| 1935 | * Is the flash disk full ? |
---|
| 1936 | */ |
---|
| 1937 | if (!sc) |
---|
| 1938 | { |
---|
| 1939 | /* |
---|
| 1940 | * If compacting is configured for the background do it now |
---|
| 1941 | * to see if we can get some space back. |
---|
| 1942 | */ |
---|
| 1943 | if ((fd->flags & RTEMS_FDISK_BACKGROUND_COMPACT)) |
---|
| 1944 | rtems_fdisk_compact (fd); |
---|
| 1945 | |
---|
| 1946 | /* |
---|
| 1947 | * Try again for some free space. |
---|
| 1948 | */ |
---|
| 1949 | sc = rtems_fdisk_segment_queue_pop_head (&fd->available); |
---|
| 1950 | |
---|
| 1951 | if (!sc) |
---|
| 1952 | { |
---|
| 1953 | rtems_fdisk_error ("write-block: no available pages"); |
---|
| 1954 | return ENOSPC; |
---|
| 1955 | } |
---|
| 1956 | } |
---|
| 1957 | |
---|
[a5de1ef] | 1958 | #if RTEMS_FDISK_TRACE |
---|
| 1959 | if (fd->info_level >= 3) |
---|
| 1960 | { |
---|
| 1961 | char queues[5]; |
---|
| 1962 | rtems_fdisk_queue_status (fd, sc, queues); |
---|
| 1963 | rtems_fdisk_info (fd, " write:%d=>%02d-%03d: queue check: %s", |
---|
| 1964 | block, sc->device, sc->segment, queues); |
---|
| 1965 | } |
---|
| 1966 | #endif |
---|
| 1967 | |
---|
[3c68c6c8] | 1968 | /* |
---|
| 1969 | * Find the next avaliable page in the segment. |
---|
| 1970 | */ |
---|
| 1971 | |
---|
| 1972 | pd = sc->page_descriptors; |
---|
| 1973 | |
---|
| 1974 | for (page = 0; page < sc->pages; page++, pd++) |
---|
| 1975 | { |
---|
| 1976 | if (rtems_fdisk_page_desc_erased (pd)) |
---|
| 1977 | { |
---|
| 1978 | pd->crc = rtems_fdisk_page_checksum (buffer, fd->block_size); |
---|
| 1979 | pd->block = block; |
---|
| 1980 | |
---|
| 1981 | bc->segment = sc; |
---|
| 1982 | bc->page = page; |
---|
| 1983 | |
---|
| 1984 | rtems_fdisk_page_desc_set_flags (pd, RTEMS_FDISK_PAGE_ACTIVE); |
---|
| 1985 | |
---|
| 1986 | #if RTEMS_FDISK_TRACE |
---|
[a5de1ef] | 1987 | rtems_fdisk_info (fd, " write:%d=>%02d-%03d-%03d: write: " \ |
---|
[3c68c6c8] | 1988 | "p=%d a=%d u=%d b=%d n=%s: f=%04x c=%04x b=%d", |
---|
| 1989 | block, sc->device, sc->segment, page, |
---|
| 1990 | sc->pages, sc->pages_active, sc->pages_used, |
---|
| 1991 | sc->pages_bad, sc->next ? "set" : "null", |
---|
| 1992 | pd->flags, pd->crc, pd->block); |
---|
| 1993 | #endif |
---|
| 1994 | |
---|
| 1995 | /* |
---|
| 1996 | * We use the segment page offset not the page number used in the |
---|
| 1997 | * driver. This skips the page descriptors. |
---|
| 1998 | */ |
---|
| 1999 | ret = rtems_fdisk_seg_write_page (fd, sc->device, sc->segment, |
---|
| 2000 | page + sc->pages_desc, buffer); |
---|
| 2001 | if (ret) |
---|
| 2002 | { |
---|
| 2003 | #if RTEMS_FDISK_TRACE |
---|
| 2004 | rtems_fdisk_info (fd, "write-block:%02d-%03d-%03d: write page failed: " \ |
---|
| 2005 | "%s (%d)", sc->device, sc->segment, page, |
---|
| 2006 | strerror (ret), ret); |
---|
| 2007 | #endif |
---|
[a5de1ef] | 2008 | sc->failed = true; |
---|
[3c68c6c8] | 2009 | } |
---|
[a5de1ef] | 2010 | else |
---|
[3c68c6c8] | 2011 | { |
---|
[a5de1ef] | 2012 | ret = rtems_fdisk_seg_write_page_desc (fd, sc->device, sc->segment, |
---|
| 2013 | page, pd); |
---|
| 2014 | if (ret) |
---|
| 2015 | { |
---|
[3c68c6c8] | 2016 | #if RTEMS_FDISK_TRACE |
---|
[a5de1ef] | 2017 | rtems_fdisk_info (fd, "write-block:%02d-%03d-%03d: " \ |
---|
| 2018 | "write page desc failed: %s (%d)", |
---|
| 2019 | sc->device, sc->segment, bc->page, |
---|
| 2020 | strerror (ret), ret); |
---|
[3c68c6c8] | 2021 | #endif |
---|
[a5de1ef] | 2022 | sc->failed = true; |
---|
| 2023 | } |
---|
| 2024 | else |
---|
| 2025 | { |
---|
| 2026 | sc->pages_active++; |
---|
| 2027 | } |
---|
[3c68c6c8] | 2028 | } |
---|
[a5de1ef] | 2029 | |
---|
[3c68c6c8] | 2030 | rtems_fdisk_queue_segment (fd, sc); |
---|
[a5de1ef] | 2031 | return ret; |
---|
[3c68c6c8] | 2032 | } |
---|
| 2033 | } |
---|
| 2034 | |
---|
| 2035 | rtems_fdisk_error ("write-block: no erased page descs in segment: %d-%d", |
---|
| 2036 | sc->device, sc->segment); |
---|
| 2037 | |
---|
[a5de1ef] | 2038 | sc->failed = true; |
---|
| 2039 | rtems_fdisk_queue_segment (fd, sc); |
---|
[3c68c6c8] | 2040 | |
---|
| 2041 | return EIO; |
---|
| 2042 | } |
---|
| 2043 | |
---|
| 2044 | /** |
---|
| 2045 | * Disk READ request handler. This primitive copies data from the |
---|
| 2046 | * flash disk to the supplied buffer and invoke the callout function |
---|
| 2047 | * to inform upper layer that reading is completed. |
---|
| 2048 | * |
---|
| 2049 | * @param req Pointer to the READ block device request info. |
---|
| 2050 | * @retval int The ioctl return value. |
---|
| 2051 | */ |
---|
| 2052 | static int |
---|
[3899a537] | 2053 | rtems_fdisk_read (rtems_flashdisk* fd, rtems_blkdev_request* req) |
---|
[3c68c6c8] | 2054 | { |
---|
[3899a537] | 2055 | rtems_blkdev_sg_buffer* sg = req->bufs; |
---|
[eb649786] | 2056 | uint32_t buf; |
---|
[3899a537] | 2057 | int ret = 0; |
---|
[3c68c6c8] | 2058 | |
---|
[eb649786] | 2059 | for (buf = 0; (ret == 0) && (buf < req->bufnum); buf++, sg++) |
---|
[3c68c6c8] | 2060 | { |
---|
[eb649786] | 2061 | uint8_t* data; |
---|
| 2062 | uint32_t fb; |
---|
| 2063 | uint32_t b; |
---|
| 2064 | fb = sg->length / fd->block_size; |
---|
| 2065 | data = sg->buffer; |
---|
| 2066 | for (b = 0; b < fb; b++, data += fd->block_size) |
---|
[3c68c6c8] | 2067 | { |
---|
[eb649786] | 2068 | ret = rtems_fdisk_read_block (fd, sg->block + b, data); |
---|
| 2069 | if (ret) |
---|
| 2070 | break; |
---|
[3c68c6c8] | 2071 | } |
---|
| 2072 | } |
---|
| 2073 | |
---|
| 2074 | req->req_done (req->done_arg, |
---|
| 2075 | ret ? RTEMS_SUCCESSFUL : RTEMS_IO_ERROR, ret); |
---|
| 2076 | |
---|
| 2077 | return ret; |
---|
| 2078 | } |
---|
| 2079 | |
---|
| 2080 | /** |
---|
| 2081 | * Flash disk WRITE request handler. This primitive copies data from |
---|
[1ff9922] | 2082 | * supplied buffer to flash disk and invoke the callout function to inform |
---|
[3c68c6c8] | 2083 | * upper layer that writing is completed. |
---|
| 2084 | * |
---|
| 2085 | * @param req Pointers to the WRITE block device request info. |
---|
| 2086 | * @retval int The ioctl return value. |
---|
| 2087 | */ |
---|
| 2088 | static int |
---|
[3899a537] | 2089 | rtems_fdisk_write (rtems_flashdisk* fd, rtems_blkdev_request* req) |
---|
[3c68c6c8] | 2090 | { |
---|
[3899a537] | 2091 | rtems_blkdev_sg_buffer* sg = req->bufs; |
---|
[eb649786] | 2092 | uint32_t buf; |
---|
[3899a537] | 2093 | int ret = 0; |
---|
[3c68c6c8] | 2094 | |
---|
[eb649786] | 2095 | for (buf = 0; (ret == 0) && (buf < req->bufnum); buf++, sg++) |
---|
[3c68c6c8] | 2096 | { |
---|
[eb649786] | 2097 | uint8_t* data; |
---|
| 2098 | uint32_t fb; |
---|
| 2099 | uint32_t b; |
---|
| 2100 | fb = sg->length / fd->block_size; |
---|
| 2101 | data = sg->buffer; |
---|
| 2102 | for (b = 0; b < fb; b++, data += fd->block_size) |
---|
[3c68c6c8] | 2103 | { |
---|
[eb649786] | 2104 | ret = rtems_fdisk_write_block (fd, sg->block + b, data); |
---|
| 2105 | if (ret) |
---|
| 2106 | break; |
---|
[3c68c6c8] | 2107 | } |
---|
| 2108 | } |
---|
| 2109 | |
---|
| 2110 | req->req_done (req->done_arg, |
---|
| 2111 | ret ? RTEMS_SUCCESSFUL : RTEMS_IO_ERROR, ret); |
---|
| 2112 | |
---|
| 2113 | return 0; |
---|
| 2114 | } |
---|
| 2115 | |
---|
| 2116 | /** |
---|
| 2117 | * Flash disk erase disk. |
---|
| 2118 | * |
---|
| 2119 | * @param fd The flashdisk data. |
---|
| 2120 | * @retval int The ioctl return value. |
---|
| 2121 | */ |
---|
| 2122 | static int |
---|
| 2123 | rtems_fdisk_erase_disk (rtems_flashdisk* fd) |
---|
| 2124 | { |
---|
| 2125 | uint32_t device; |
---|
| 2126 | int ret; |
---|
| 2127 | |
---|
| 2128 | #if RTEMS_FDISK_TRACE |
---|
| 2129 | rtems_fdisk_info (fd, "erase-disk"); |
---|
| 2130 | #endif |
---|
| 2131 | |
---|
| 2132 | ret = rtems_fdisk_erase_flash (fd); |
---|
| 2133 | |
---|
| 2134 | if (ret == 0) |
---|
| 2135 | { |
---|
| 2136 | for (device = 0; device < fd->device_count; device++) |
---|
| 2137 | { |
---|
| 2138 | if (!fd->devices[device].segments) |
---|
| 2139 | return ENOMEM; |
---|
| 2140 | |
---|
| 2141 | ret = rtems_fdisk_recover_block_mappings (fd); |
---|
| 2142 | if (ret) |
---|
| 2143 | break; |
---|
| 2144 | } |
---|
| 2145 | } |
---|
| 2146 | |
---|
| 2147 | return ret; |
---|
| 2148 | } |
---|
| 2149 | |
---|
| 2150 | /** |
---|
| 2151 | * Flash Disk Monitoring data is return in the monitoring data |
---|
| 2152 | * structure. |
---|
| 2153 | */ |
---|
| 2154 | static int |
---|
| 2155 | rtems_fdisk_monitoring_data (rtems_flashdisk* fd, |
---|
| 2156 | rtems_fdisk_monitor_data* data) |
---|
| 2157 | { |
---|
| 2158 | uint32_t i; |
---|
| 2159 | uint32_t j; |
---|
| 2160 | |
---|
| 2161 | data->block_size = fd->block_size; |
---|
| 2162 | data->block_count = fd->block_count; |
---|
[a5de1ef] | 2163 | data->unavail_blocks = fd->unavail_blocks; |
---|
[3c68c6c8] | 2164 | data->device_count = fd->device_count; |
---|
| 2165 | |
---|
| 2166 | data->blocks_used = 0; |
---|
| 2167 | for (i = 0; i < fd->block_count; i++) |
---|
| 2168 | if (fd->blocks[i].segment) |
---|
| 2169 | data->blocks_used++; |
---|
| 2170 | |
---|
[a5de1ef] | 2171 | data->segs_available = rtems_fdisk_segment_count_queue (&fd->available); |
---|
| 2172 | data->segs_used = rtems_fdisk_segment_count_queue (&fd->used); |
---|
| 2173 | data->segs_failed = rtems_fdisk_segment_count_queue (&fd->failed); |
---|
[3c68c6c8] | 2174 | |
---|
| 2175 | data->segment_count = 0; |
---|
| 2176 | data->page_count = 0; |
---|
| 2177 | data->pages_desc = 0; |
---|
| 2178 | data->pages_active = 0; |
---|
| 2179 | data->pages_used = 0; |
---|
| 2180 | data->pages_bad = 0; |
---|
| 2181 | data->seg_erases = 0; |
---|
| 2182 | |
---|
| 2183 | for (i = 0; i < fd->device_count; i++) |
---|
| 2184 | { |
---|
| 2185 | data->segment_count += fd->devices[i].segment_count; |
---|
| 2186 | |
---|
| 2187 | for (j = 0; j < fd->devices[i].segment_count; j++) |
---|
| 2188 | { |
---|
| 2189 | rtems_fdisk_segment_ctl* sc = &fd->devices[i].segments[j]; |
---|
| 2190 | |
---|
| 2191 | data->page_count += sc->pages; |
---|
| 2192 | data->pages_desc += sc->pages_desc; |
---|
| 2193 | data->pages_active += sc->pages_active; |
---|
| 2194 | data->pages_used += sc->pages_used; |
---|
| 2195 | data->pages_bad += sc->pages_bad; |
---|
| 2196 | data->seg_erases += sc->erased; |
---|
| 2197 | } |
---|
| 2198 | } |
---|
| 2199 | |
---|
| 2200 | data->info_level = fd->info_level; |
---|
| 2201 | return 0; |
---|
| 2202 | } |
---|
| 2203 | |
---|
| 2204 | /** |
---|
| 2205 | * Print to stdout the status of the driver. This is a debugging aid. |
---|
| 2206 | */ |
---|
| 2207 | static int |
---|
| 2208 | rtems_fdisk_print_status (rtems_flashdisk* fd) |
---|
| 2209 | { |
---|
| 2210 | #if RTEMS_FDISK_TRACE |
---|
| 2211 | uint32_t current_info_level = fd->info_level; |
---|
| 2212 | uint32_t total; |
---|
| 2213 | uint32_t count; |
---|
| 2214 | uint32_t device; |
---|
| 2215 | |
---|
| 2216 | fd->info_level = 3; |
---|
| 2217 | |
---|
| 2218 | rtems_fdisk_printf (fd, |
---|
| 2219 | "Flash Disk Driver Status : %d.%d", fd->major, fd->minor); |
---|
| 2220 | |
---|
| 2221 | rtems_fdisk_printf (fd, "Block count\t%d", fd->block_count); |
---|
[a5de1ef] | 2222 | rtems_fdisk_printf (fd, "Unavail blocks\t%d", fd->unavail_blocks); |
---|
| 2223 | count = rtems_fdisk_segment_count_queue (&fd->available); |
---|
[3c68c6c8] | 2224 | total = count; |
---|
[a5de1ef] | 2225 | rtems_fdisk_printf (fd, "Available queue\t%ld (%ld)", |
---|
| 2226 | count, rtems_fdisk_segment_queue_count (&fd->available)); |
---|
| 2227 | count = rtems_fdisk_segment_count_queue (&fd->used); |
---|
[3c68c6c8] | 2228 | total += count; |
---|
[a5de1ef] | 2229 | rtems_fdisk_printf (fd, "Used queue\t%ld (%ld)", |
---|
| 2230 | count, rtems_fdisk_segment_queue_count (&fd->used)); |
---|
| 2231 | count = rtems_fdisk_segment_count_queue (&fd->erase); |
---|
[3c68c6c8] | 2232 | total += count; |
---|
[a5de1ef] | 2233 | rtems_fdisk_printf (fd, "Erase queue\t%ld (%ld)", |
---|
| 2234 | count, rtems_fdisk_segment_queue_count (&fd->erase)); |
---|
| 2235 | count = rtems_fdisk_segment_count_queue (&fd->failed); |
---|
[3c68c6c8] | 2236 | total += count; |
---|
[a5de1ef] | 2237 | rtems_fdisk_printf (fd, "Failed queue\t%ld (%ld)", |
---|
| 2238 | count, rtems_fdisk_segment_queue_count (&fd->failed)); |
---|
[3c68c6c8] | 2239 | |
---|
| 2240 | count = 0; |
---|
| 2241 | for (device = 0; device < fd->device_count; device++) |
---|
| 2242 | count += fd->devices[device].segment_count; |
---|
| 2243 | |
---|
| 2244 | rtems_fdisk_printf (fd, "Queue total\t%ld of %ld, %s", total, count, |
---|
| 2245 | total == count ? "ok" : "MISSING"); |
---|
| 2246 | |
---|
| 2247 | rtems_fdisk_printf (fd, "Device count\t%d", fd->device_count); |
---|
| 2248 | |
---|
| 2249 | for (device = 0; device < fd->device_count; device++) |
---|
| 2250 | { |
---|
| 2251 | uint32_t block; |
---|
| 2252 | uint32_t seg; |
---|
| 2253 | |
---|
| 2254 | rtems_fdisk_printf (fd, " Device\t\t%ld", device); |
---|
| 2255 | rtems_fdisk_printf (fd, " Segment count\t%ld", |
---|
| 2256 | fd->devices[device].segment_count); |
---|
| 2257 | |
---|
| 2258 | for (seg = 0; seg < fd->devices[device].segment_count; seg++) |
---|
| 2259 | { |
---|
| 2260 | rtems_fdisk_segment_ctl* sc = &fd->devices[device].segments[seg]; |
---|
| 2261 | uint32_t page; |
---|
| 2262 | uint32_t erased = 0; |
---|
| 2263 | uint32_t active = 0; |
---|
| 2264 | uint32_t used = 0; |
---|
| 2265 | bool is_active = false; |
---|
| 2266 | char queues[5]; |
---|
| 2267 | |
---|
[a5de1ef] | 2268 | rtems_fdisk_queue_status (fd, sc, queues); |
---|
| 2269 | |
---|
[3c68c6c8] | 2270 | for (page = 0; page < sc->pages; page++) |
---|
| 2271 | { |
---|
| 2272 | if (rtems_fdisk_page_desc_erased (&sc->page_descriptors[page])) |
---|
| 2273 | erased++; |
---|
| 2274 | else if (rtems_fdisk_page_desc_flags_set (&sc->page_descriptors[page], |
---|
| 2275 | RTEMS_FDISK_PAGE_ACTIVE)) |
---|
| 2276 | { |
---|
| 2277 | if (rtems_fdisk_page_desc_flags_set (&sc->page_descriptors[page], |
---|
| 2278 | RTEMS_FDISK_PAGE_USED)) |
---|
| 2279 | used++; |
---|
| 2280 | else |
---|
| 2281 | { |
---|
| 2282 | active++; |
---|
| 2283 | is_active = true; |
---|
| 2284 | } |
---|
| 2285 | } |
---|
| 2286 | |
---|
| 2287 | for (block = 0; block < fd->block_count; block++) |
---|
| 2288 | { |
---|
| 2289 | if ((fd->blocks[block].segment == sc) && |
---|
| 2290 | (fd->blocks[block].page == page) && !is_active) |
---|
| 2291 | rtems_fdisk_printf (fd, |
---|
| 2292 | " %ld\t not active when mapped by block %ld", |
---|
| 2293 | page, block); |
---|
| 2294 | } |
---|
| 2295 | } |
---|
| 2296 | |
---|
| 2297 | count = 0; |
---|
| 2298 | for (block = 0; block < fd->block_count; block++) |
---|
| 2299 | { |
---|
| 2300 | if (fd->blocks[block].segment == sc) |
---|
| 2301 | count++; |
---|
| 2302 | } |
---|
| 2303 | |
---|
| 2304 | rtems_fdisk_printf (fd, " %3ld %s p:%3ld a:%3ld/%3ld" \ |
---|
| 2305 | " u:%3ld/%3ld e:%3ld/%3ld br:%ld", |
---|
| 2306 | seg, queues, |
---|
| 2307 | sc->pages, sc->pages_active, active, |
---|
| 2308 | sc->pages_used, used, erased, |
---|
| 2309 | sc->pages - (sc->pages_active + |
---|
| 2310 | sc->pages_used + sc->pages_bad), |
---|
| 2311 | count); |
---|
| 2312 | } |
---|
| 2313 | } |
---|
[a5de1ef] | 2314 | |
---|
| 2315 | { |
---|
| 2316 | rtems_fdisk_segment_ctl* sc = fd->used.head; |
---|
| 2317 | int count = 0; |
---|
| 2318 | rtems_fdisk_printf (fd, "Used List:"); |
---|
| 2319 | while (sc) |
---|
| 2320 | { |
---|
| 2321 | rtems_fdisk_printf (fd, " %3d %02d:%03d u:%3ld", |
---|
| 2322 | count, sc->device, sc->segment, sc->pages_used); |
---|
| 2323 | sc = sc->next; |
---|
| 2324 | count++; |
---|
| 2325 | } |
---|
| 2326 | } |
---|
[3c68c6c8] | 2327 | fd->info_level = current_info_level; |
---|
| 2328 | |
---|
| 2329 | return 0; |
---|
| 2330 | #else |
---|
| 2331 | return ENOSYS; |
---|
| 2332 | #endif |
---|
| 2333 | } |
---|
| 2334 | |
---|
| 2335 | /** |
---|
| 2336 | * Flash disk IOCTL handler. |
---|
| 2337 | * |
---|
[b96e09c] | 2338 | * @param dd Disk device. |
---|
[3c68c6c8] | 2339 | * @param req IOCTL request code. |
---|
| 2340 | * @param argp IOCTL argument. |
---|
| 2341 | * @retval The IOCTL return value |
---|
| 2342 | */ |
---|
| 2343 | static int |
---|
[b96e09c] | 2344 | rtems_fdisk_ioctl (rtems_disk_device *dd, uint32_t req, void* argp) |
---|
[3c68c6c8] | 2345 | { |
---|
[b96e09c] | 2346 | dev_t dev = rtems_disk_physical_device_number (dd); |
---|
[3c68c6c8] | 2347 | rtems_device_minor_number minor = rtems_filesystem_dev_minor_t (dev); |
---|
[3899a537] | 2348 | rtems_blkdev_request* r = argp; |
---|
[3c68c6c8] | 2349 | rtems_status_code sc; |
---|
| 2350 | |
---|
| 2351 | errno = 0; |
---|
| 2352 | |
---|
| 2353 | sc = rtems_semaphore_obtain (rtems_flashdisks[minor].lock, RTEMS_WAIT, 0); |
---|
| 2354 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 2355 | errno = EIO; |
---|
| 2356 | else |
---|
| 2357 | { |
---|
[eb649786] | 2358 | errno = 0; |
---|
[3c68c6c8] | 2359 | switch (req) |
---|
| 2360 | { |
---|
[3899a537] | 2361 | case RTEMS_BLKIO_REQUEST: |
---|
[3c68c6c8] | 2362 | if ((minor >= rtems_flashdisk_count) || |
---|
| 2363 | (rtems_flashdisks[minor].device_count == 0)) |
---|
| 2364 | { |
---|
| 2365 | errno = ENODEV; |
---|
| 2366 | } |
---|
| 2367 | else |
---|
| 2368 | { |
---|
| 2369 | switch (r->req) |
---|
| 2370 | { |
---|
[3899a537] | 2371 | case RTEMS_BLKDEV_REQ_READ: |
---|
[3c68c6c8] | 2372 | errno = rtems_fdisk_read (&rtems_flashdisks[minor], r); |
---|
| 2373 | break; |
---|
| 2374 | |
---|
[3899a537] | 2375 | case RTEMS_BLKDEV_REQ_WRITE: |
---|
[3c68c6c8] | 2376 | errno = rtems_fdisk_write (&rtems_flashdisks[minor], r); |
---|
| 2377 | break; |
---|
| 2378 | |
---|
| 2379 | default: |
---|
[918a0d8] | 2380 | errno = EINVAL; |
---|
[3c68c6c8] | 2381 | break; |
---|
| 2382 | } |
---|
| 2383 | } |
---|
| 2384 | break; |
---|
| 2385 | |
---|
| 2386 | case RTEMS_FDISK_IOCTL_ERASE_DISK: |
---|
| 2387 | errno = rtems_fdisk_erase_disk (&rtems_flashdisks[minor]); |
---|
| 2388 | break; |
---|
| 2389 | |
---|
| 2390 | case RTEMS_FDISK_IOCTL_COMPACT: |
---|
| 2391 | errno = rtems_fdisk_compact (&rtems_flashdisks[minor]); |
---|
| 2392 | break; |
---|
| 2393 | |
---|
| 2394 | case RTEMS_FDISK_IOCTL_ERASE_USED: |
---|
| 2395 | errno = rtems_fdisk_erase_used (&rtems_flashdisks[minor]); |
---|
| 2396 | break; |
---|
| 2397 | |
---|
| 2398 | case RTEMS_FDISK_IOCTL_MONITORING: |
---|
| 2399 | errno = rtems_fdisk_monitoring_data (&rtems_flashdisks[minor], |
---|
| 2400 | (rtems_fdisk_monitor_data*) argp); |
---|
| 2401 | break; |
---|
| 2402 | |
---|
| 2403 | case RTEMS_FDISK_IOCTL_INFO_LEVEL: |
---|
| 2404 | rtems_flashdisks[minor].info_level = (uint32_t) argp; |
---|
| 2405 | break; |
---|
| 2406 | |
---|
| 2407 | case RTEMS_FDISK_IOCTL_PRINT_STATUS: |
---|
| 2408 | errno = rtems_fdisk_print_status (&rtems_flashdisks[minor]); |
---|
| 2409 | break; |
---|
| 2410 | |
---|
| 2411 | default: |
---|
[b96e09c] | 2412 | rtems_blkdev_ioctl (dd, req, argp); |
---|
[3c68c6c8] | 2413 | break; |
---|
| 2414 | } |
---|
| 2415 | |
---|
| 2416 | sc = rtems_semaphore_release (rtems_flashdisks[minor].lock); |
---|
| 2417 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 2418 | errno = EIO; |
---|
| 2419 | } |
---|
| 2420 | |
---|
| 2421 | return errno == 0 ? 0 : -1; |
---|
| 2422 | } |
---|
| 2423 | |
---|
| 2424 | /** |
---|
| 2425 | * Flash disk device driver initialization. |
---|
| 2426 | * |
---|
[1ff9922] | 2427 | * @todo Memory clean up on error is really badly handled. |
---|
| 2428 | * |
---|
[3c68c6c8] | 2429 | * @param major Flash disk major device number. |
---|
| 2430 | * @param minor Minor device number, not applicable. |
---|
| 2431 | * @param arg Initialization argument, not applicable. |
---|
| 2432 | */ |
---|
| 2433 | rtems_device_driver |
---|
| 2434 | rtems_fdisk_initialize (rtems_device_major_number major, |
---|
| 2435 | rtems_device_minor_number minor, |
---|
[31e2698] | 2436 | void* arg __attribute__((unused))) |
---|
[3c68c6c8] | 2437 | { |
---|
| 2438 | const rtems_flashdisk_config* c = rtems_flashdisk_configuration; |
---|
| 2439 | rtems_flashdisk* fd; |
---|
| 2440 | rtems_status_code sc; |
---|
| 2441 | |
---|
| 2442 | sc = rtems_disk_io_initialize (); |
---|
| 2443 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 2444 | return sc; |
---|
| 2445 | |
---|
| 2446 | sc = rtems_fdisk_crc16_gen_factors (0x8408); |
---|
| 2447 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 2448 | return sc; |
---|
| 2449 | |
---|
| 2450 | rtems_flashdisks = calloc (rtems_flashdisk_configuration_size, |
---|
| 2451 | sizeof (rtems_flashdisk)); |
---|
| 2452 | |
---|
| 2453 | if (!rtems_flashdisks) |
---|
| 2454 | return RTEMS_NO_MEMORY; |
---|
| 2455 | |
---|
| 2456 | for (minor = 0; minor < rtems_flashdisk_configuration_size; minor++, c++) |
---|
| 2457 | { |
---|
[72755421] | 2458 | char name[] = RTEMS_FLASHDISK_DEVICE_BASE_NAME "a"; |
---|
[3c68c6c8] | 2459 | dev_t dev = rtems_filesystem_make_dev_t (major, minor); |
---|
| 2460 | uint32_t device; |
---|
| 2461 | uint32_t blocks = 0; |
---|
| 2462 | int ret; |
---|
| 2463 | |
---|
| 2464 | fd = &rtems_flashdisks[minor]; |
---|
| 2465 | |
---|
[72755421] | 2466 | name [sizeof(RTEMS_FLASHDISK_DEVICE_BASE_NAME)] += minor; |
---|
[3c68c6c8] | 2467 | |
---|
[a5de1ef] | 2468 | fd->major = major; |
---|
| 2469 | fd->minor = minor; |
---|
| 2470 | fd->flags = c->flags; |
---|
| 2471 | fd->compact_segs = c->compact_segs; |
---|
| 2472 | fd->avail_compact_segs = c->avail_compact_segs; |
---|
| 2473 | fd->block_size = c->block_size; |
---|
| 2474 | fd->unavail_blocks = c->unavail_blocks; |
---|
| 2475 | fd->info_level = c->info_level; |
---|
[3c68c6c8] | 2476 | |
---|
| 2477 | for (device = 0; device < c->device_count; device++) |
---|
| 2478 | blocks += rtems_fdisk_blocks_in_device (&c->devices[device], |
---|
| 2479 | c->block_size); |
---|
| 2480 | |
---|
[a5de1ef] | 2481 | sc = rtems_disk_create_phys(dev, c->block_size, |
---|
| 2482 | blocks - fd->unavail_blocks, |
---|
[b96e09c] | 2483 | rtems_fdisk_ioctl, NULL, name); |
---|
[3c68c6c8] | 2484 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 2485 | { |
---|
| 2486 | rtems_fdisk_error ("disk create phy failed"); |
---|
| 2487 | return sc; |
---|
| 2488 | } |
---|
| 2489 | |
---|
| 2490 | sc = rtems_semaphore_create (rtems_build_name ('F', 'D', 'S', 'K'), 1, |
---|
| 2491 | RTEMS_PRIORITY | RTEMS_BINARY_SEMAPHORE | |
---|
| 2492 | RTEMS_INHERIT_PRIORITY, 0, &fd->lock); |
---|
| 2493 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 2494 | { |
---|
| 2495 | rtems_fdisk_error ("disk lock create failed"); |
---|
| 2496 | return sc; |
---|
| 2497 | } |
---|
| 2498 | |
---|
| 2499 | /* |
---|
| 2500 | * One copy buffer of a page size. |
---|
| 2501 | */ |
---|
| 2502 | fd->copy_buffer = malloc (c->block_size); |
---|
| 2503 | if (!fd->copy_buffer) |
---|
| 2504 | return RTEMS_NO_MEMORY; |
---|
| 2505 | |
---|
| 2506 | fd->blocks = calloc (blocks, sizeof (rtems_fdisk_block_ctl)); |
---|
| 2507 | if (!fd->blocks) |
---|
| 2508 | return RTEMS_NO_MEMORY; |
---|
| 2509 | |
---|
[1ff9922] | 2510 | fd->block_count = blocks; |
---|
[3c68c6c8] | 2511 | |
---|
| 2512 | fd->devices = calloc (c->device_count, sizeof (rtems_fdisk_device_ctl)); |
---|
| 2513 | if (!fd->devices) |
---|
| 2514 | return RTEMS_NO_MEMORY; |
---|
| 2515 | |
---|
| 2516 | for (device = 0; device < c->device_count; device++) |
---|
| 2517 | { |
---|
| 2518 | rtems_fdisk_segment_ctl* sc; |
---|
| 2519 | uint32_t segment_count; |
---|
| 2520 | uint32_t segment; |
---|
| 2521 | |
---|
| 2522 | segment_count = rtems_fdisk_count_segments (&c->devices[device]); |
---|
| 2523 | |
---|
| 2524 | fd->devices[device].segments = calloc (segment_count, |
---|
| 2525 | sizeof (rtems_fdisk_segment_ctl)); |
---|
| 2526 | if (!fd->devices[device].segments) |
---|
| 2527 | return RTEMS_NO_MEMORY; |
---|
| 2528 | |
---|
| 2529 | sc = fd->devices[device].segments; |
---|
| 2530 | |
---|
| 2531 | for (segment = 0; segment < c->devices[device].segment_count; segment++) |
---|
| 2532 | { |
---|
| 2533 | const rtems_fdisk_segment_desc* sd; |
---|
| 2534 | uint32_t seg_segment; |
---|
| 2535 | |
---|
| 2536 | sd = &c->devices[device].segments[segment]; |
---|
| 2537 | |
---|
| 2538 | for (seg_segment = 0; seg_segment < sd->count; seg_segment++, sc++) |
---|
| 2539 | { |
---|
| 2540 | sc->descriptor = sd; |
---|
| 2541 | sc->device = device; |
---|
| 2542 | sc->segment = seg_segment; |
---|
| 2543 | sc->erased = 0; |
---|
| 2544 | } |
---|
| 2545 | } |
---|
| 2546 | |
---|
| 2547 | fd->devices[device].segment_count = segment_count; |
---|
| 2548 | fd->devices[device].descriptor = &c->devices[device]; |
---|
| 2549 | } |
---|
| 2550 | |
---|
| 2551 | fd->device_count = c->device_count; |
---|
| 2552 | |
---|
| 2553 | ret = rtems_fdisk_recover_block_mappings (fd); |
---|
| 2554 | if (ret) |
---|
| 2555 | rtems_fdisk_error ("recovery of disk failed: %s (%d)", |
---|
| 2556 | strerror (ret), ret); |
---|
| 2557 | |
---|
| 2558 | ret = rtems_fdisk_compact (fd); |
---|
| 2559 | if (ret) |
---|
| 2560 | rtems_fdisk_error ("compacting of disk failed: %s (%d)", |
---|
| 2561 | strerror (ret), ret); |
---|
| 2562 | } |
---|
| 2563 | |
---|
[1ff9922] | 2564 | rtems_flashdisk_count = rtems_flashdisk_configuration_size; |
---|
| 2565 | |
---|
[3c68c6c8] | 2566 | return RTEMS_SUCCESSFUL; |
---|
| 2567 | } |
---|