eMMC查看底层运行状况信息的方法

Condi

最近，经常有客户咨询如何查看eMMC底层信息，如何了解eMMC运行状况，或者如和把握eMMC使用剩余寿命，eMMC是否有类似于SSD的SMART信息的窗口。

实际上，这是有的，但是功能没有SMART强大。
这个工具就是：mmc-utils（https://packages.debian.org/stretch/mmc-utils）中的“ mmc”实用程序。其他下载地址：git（https://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc-utils.git/）

但是，我还没有看到写入和/或坏块计数器。

示例：

1. # mmc extcsd read /dev/mmcblk1
   
2. =============================================
   
3.   Extended CSD rev 1.7 (MMC 5.0)
   
4. =============================================
   
5. 
   
6. Card Supported Command sets [S_CMD_SET: 0x01]
   
7. HPI Features [HPI_FEATURE: 0x01]: implementation based on CMD13
   
8. Background operations support [BKOPS_SUPPORT: 0x01]
   
9. Max Packet Read Cmd [MAX_PACKED_READS: 0x3f]
   
10. Max Packet Write Cmd [MAX_PACKED_WRITES: 0x3f]
    
11. Data TAG support [DATA_TAG_SUPPORT: 0x01]
    
12. Data TAG Unit Size [TAG_UNIT_SIZE: 0x03]
    
13. Tag Resources Size [TAG_RES_SIZE: 0x03]
    
14. Context Management Capabilities [CONTEXT_CAPABILITIES: 0x05]
    
15. Large Unit Size [LARGE_UNIT_SIZE_M1: 0x00]
    
16. Extended partition attribute support [EXT_SUPPORT: 0x03]
    
17. Generic CMD6 Timer [GENERIC_CMD6_TIME: 0x19]
    
18. Power off notification [POWER_OFF_LONG_TIME: 0x19]
    
19. Cache Size [CACHE_SIZE] is 4096 KiB
    
20. Background operations status [BKOPS_STATUS: 0x00]
    
21. 1st Initialisation Time after programmed sector [INI_TIMEOUT_AP: 0x50]
    
22. Power class for 52MHz, DDR at 3.6V [PWR_CL_DDR_52_360: 0x00]
    
23. Power class for 52MHz, DDR at 1.95V [PWR_CL_DDR_52_195: 0xdd]
    
24. Power class for 200MHz at 3.6V [PWR_CL_200_360: 0xdd]
    
25. Power class for 200MHz, at 1.95V [PWR_CL_200_195: 0x00]
    
26. Minimum Performance for 8bit at 52MHz in DDR mode:
    
27. [MIN_PERF_DDR_W_8_52: 0x00]
    
28. [MIN_PERF_DDR_R_8_52: 0x00]
    
29. TRIM Multiplier [TRIM_MULT: 0x03]
    
30. Secure Feature support [SEC_FEATURE_SUPPORT: 0x55]
    
31. Boot Information [BOOT_INFO: 0x07]
    
32. Device supports alternative boot method
    
33. Device supports dual data rate during boot
    
34. Device supports high speed timing during boot
    
35. Boot partition size [BOOT_SIZE_MULTI: 0x20]
    
36. Access size [ACC_SIZE: 0x08]
    
37. High-capacity erase unit size [HC_ERASE_GRP_SIZE: 0x01]
    
38. i.e. 512 KiB
    
39. High-capacity erase timeout [ERASE_TIMEOUT_MULT: 0x03]
    
40. Reliable write sector count [REL_WR_SEC_C: 0x01]
    
41. High-capacity W protect group size [HC_WP_GRP_SIZE: 0x10]
    
42. i.e. 8192 KiB
    
43. Sleep current (VCC) [S_C_VCC: 0x08]
    
44. Sleep current (VCCQ) [S_C_VCCQ: 0x07]
    
45. Sleep/awake timeout [S_A_TIMEOUT: 0x12]
    
46. Sector Count [SEC_COUNT: 0x00e90000]
    
47. Device is block-addressed
    
48. Minimum Write Performance for 8bit:
    
49. [MIN_PERF_W_8_52: 0x0a]
    
50. [MIN_PERF_R_8_52: 0x0a]
    
51. [MIN_PERF_W_8_26_4_52: 0x0a]
    
52. [MIN_PERF_R_8_26_4_52: 0x0a]
    
53. Minimum Write Performance for 4bit:
    
54. [MIN_PERF_W_4_26: 0x0a]
    
55. [MIN_PERF_R_4_26: 0x0a]
    
56. Power classes registers:
    
57. [PWR_CL_26_360: 0x00]
    
58. [PWR_CL_52_360: 0x00]
    
59. [PWR_CL_26_195: 0xdd]
    
60. [PWR_CL_52_195: 0xdd]
    
61. Partition switching timing [PARTITION_SWITCH_TIME: 0x03]
    
62. Out-of-interrupt busy timing [OUT_OF_INTERRUPT_TIME: 0x05]
    
63. I/O Driver Strength [DRIVER_STRENGTH: 0x1f]
    
64. Card Type [CARD_TYPE: 0x57]
    
65. HS200 Single Data Rate eMMC @200MHz 1.8VI/O
    
66. HS Dual Data Rate eMMC @52MHz 1.8V or 3VI/O
    
67. HS eMMC @52MHz - at rated device voltage(s)
    
68. HS eMMC @26MHz - at rated device voltage(s)
    
69. CSD structure version [CSD_STRUCTURE: 0x02]
    
70. Command set [CMD_SET: 0x00]
    
71. Command set revision [CMD_SET_REV: 0x00]
    
72. Power class [POWER_CLASS: 0x0d]
    
73. High-speed interface timing [HS_TIMING: 0x02]
    
74. Erased memory content [ERASED_MEM_CONT: 0x00]
    
75. Boot configuration bytes [PARTITION_CONFIG: 0x00]
    
76. Not boot enable
    
77. No access to boot partition
    
78. Boot config protection [BOOT_CONFIG_PROT: 0x00]
    
79. Boot bus Conditions [BOOT_BUS_CONDITIONS: 0x00]
    
80. High-density erase group definition [ERASE_GROUP_DEF: 0x01]
    
81. Boot write protection status registers [BOOT_WP_STATUS]: 0x00
    
82. Boot Area Write protection [BOOT_WP]: 0x00
    
83. Power ro locking: possible
    
84. Permanent ro locking: possible
    
85. ro lock status: not locked
    
86. User area write protection register [USER_WP]: 0x00
    
87. FW configuration [FW_CONFIG]: 0x00
    
88. RPMB Size [RPMB_SIZE_MULT]: 0x20
    
89. Write reliability setting register [WR_REL_SET]: 0x1f
    
90. user area: the device protects existing data if a power failure occurs during a write operation
    
91. partition 1: the device protects existing data if a power failure occurs during a write operation
    
92. partition 2: the device protects existing data if a power failure occurs during a write operation
    
93. partition 3: the device protects existing data if a power failure occurs during a write operation
    
94. partition 4: the device protects existing data if a power failure occurs during a write operation
    
95. Write reliability parameter register [WR_REL_PARAM]: 0x05
    
96. Device supports writing EXT_CSD_WR_REL_SET
    
97. Device supports the enhanced def. of reliable write
    
98. Enable background operations handshake [BKOPS_EN]: 0x00
    
99. H/W reset function [RST_N_FUNCTION]: 0x00
    
100. HPI management [HPI_MGMT]: 0x01
     
101. Partitioning Support [PARTITIONING_SUPPORT]: 0x07
     
102. Device support partitioning feature
     
103. Device can have enhanced tech.
     
104. Max Enhanced Area Size [MAX_ENH_SIZE_MULT]: 0x000124
     
105. i.e. 2392064 KiB
     
106. Partitions attribute [PARTITIONS_ATTRIBUTE]: 0x00
     
107. Partitioning Setting [PARTITION_SETTING_COMPLETED]: 0x00
     
108. Device partition setting NOT complete
     
109. General Purpose Partition Size
     
110. [GP_SIZE_MULT_4]: 0x000000
     
111. [GP_SIZE_MULT_3]: 0x000000
     
112. [GP_SIZE_MULT_2]: 0x000000
     
113. [GP_SIZE_MULT_1]: 0x000000
     
114. Enhanced User Data Area Size [ENH_SIZE_MULT]: 0x000000
     
115. i.e. 0 KiB
     
116. Enhanced User Data Start Address [ENH_START_ADDR]: 0x000000
     
117. i.e. 0 bytes offset
     
118. Bad Block Management mode [SEC_BAD_BLK_MGMNT]: 0x00
     
119. Periodic Wake-up [PERIODIC_WAKEUP]: 0x00
     
120. Program CID/CSD in DDR mode support [PROGRAM_CID_CSD_DDR_SUPPORT]: 0x01
     
121. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[127]]: 0x00
     
122. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[126]]: 0x00
     
123. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[125]]: 0x00
     
124. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[124]]: 0x00
     
125. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[123]]: 0x00
     
126. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[122]]: 0x00
     
127. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[121]]: 0x00
     
128. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[120]]: 0x02
     
129. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[119]]: 0x00
     
130. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[118]]: 0x00
     
131. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[117]]: 0x00
     
132. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[116]]: 0x00
     
133. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[115]]: 0x00
     
134. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[114]]: 0x00
     
135. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[113]]: 0x00
     
136. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[112]]: 0x00
     
137. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[111]]: 0x00
     
138. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[110]]: 0x00
     
139. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[109]]: 0x00
     
140. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[108]]: 0x00
     
141. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[107]]: 0x00
     
142. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[106]]: 0x00
     
143. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[105]]: 0x00
     
144. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[104]]: 0x00
     
145. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[103]]: 0x00
     
146. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[102]]: 0x00
     
147. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[101]]: 0x00
     
148. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[100]]: 0x00
     
149. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[99]]: 0x00
     
150. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[98]]: 0x00
     
151. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[97]]: 0x00
     
152. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[96]]: 0x00
     
153. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[95]]: 0x02
     
154. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[94]]: 0x01
     
155. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[93]]: 0x04
     
156. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[92]]: 0x00
     
157. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[91]]: 0x00
     
158. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[90]]: 0x00
     
159. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[89]]: 0x00
     
160. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[88]]: 0x00
     
161. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[87]]: 0x00
     
162. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[86]]: 0x00
     
163. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[85]]: 0x03
     
164. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[84]]: 0x00
     
165. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[83]]: 0x00
     
166. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[82]]: 0x00
     
167. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[81]]: 0x00
     
168. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[80]]: 0x00
     
169. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[79]]: 0x00
     
170. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[78]]: 0x00
     
171. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[77]]: 0x00
     
172. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[76]]: 0x00
     
173. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[75]]: 0x00
     
174. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[74]]: 0x00
     
175. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[73]]: 0x00
     
176. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[72]]: 0x00
     
177. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[71]]: 0x00
     
178. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[70]]: 0x00
     
179. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[69]]: 0x00
     
180. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[68]]: 0x00
     
181. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[67]]: 0x00
     
182. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[66]]: 0x00
     
183. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[65]]: 0x00
     
184. Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[64]]: 0x00
     
185. Native sector size [NATIVE_SECTOR_SIZE]: 0x00
     
186. Sector size emulation [USE_NATIVE_SECTOR]: 0x00
     
187. Sector size [DATA_SECTOR_SIZE]: 0x00
     
188. 1st initialization after disabling sector size emulation [INI_TIMEOUT_EMU]: 0x0a
     
189. Class 6 commands control [CLASS_6_CTRL]: 0x00
     
190. Number of addressed group to be Released[DYNCAP_NEEDED]: 0x00
     
191. Exception events control [EXCEPTION_EVENTS_CTRL]: 0x0000
     
192. Exception events status[EXCEPTION_EVENTS_STATUS]: 0x0000
     
193. Extended Partitions Attribute [EXT_PARTITIONS_ATTRIBUTE]: 0x0000
     
194. Context configuration [CONTEXT_CONF[51]]: 0x00
     
195. Context configuration [CONTEXT_CONF[50]]: 0x00
     
196. Context configuration [CONTEXT_CONF[49]]: 0x00
     
197. Context configuration [CONTEXT_CONF[48]]: 0x00
     
198. Context configuration [CONTEXT_CONF[47]]: 0x00
     
199. Context configuration [CONTEXT_CONF[46]]: 0x00
     
200. Context configuration [CONTEXT_CONF[45]]: 0x00
     
201. Context configuration [CONTEXT_CONF[44]]: 0x00
     
202. Context configuration [CONTEXT_CONF[43]]: 0x00
     
203. Context configuration [CONTEXT_CONF[42]]: 0x00
     
204. Context configuration [CONTEXT_CONF[41]]: 0x00
     
205. Context configuration [CONTEXT_CONF[40]]: 0x00
     
206. Context configuration [CONTEXT_CONF[39]]: 0x00
     
207. Context configuration [CONTEXT_CONF[38]]: 0x00
     
208. Context configuration [CONTEXT_CONF[37]]: 0x00
     
209. Packed command status [PACKED_COMMAND_STATUS]: 0x00
     
210. Packed command failure index [PACKED_FAILURE_INDEX]: 0x00
     
211. Power Off Notification [POWER_OFF_NOTIFICATION]: 0x01
     
212. Control to turn the Cache ON/OFF [CACHE_CTRL]: 0x01
     
213. eMMC Firmware Version: 002122  AS

复制代码

Condi

Write reliability setting register [WR_REL_SET]: 0x1f
user area: the device protects existing data if a power failure occurs during a write operation

Condi

eMMC剩余寿命
DEVICE_LIFE_TIME_EST_TYP_ {A，B}，其中1表示保留0-10％所使用的块数，2是10-20％，依此类推。