diff mbox series

[v2] mmc-utils: feature spec 5.0+, add secure removal type fileds to Extended CSD

Message ID 20190808092341.3610-1-js07.lee@samsung.com (mailing list archive)
State New, archived
Headers show
Series [v2] mmc-utils: feature spec 5.0+, add secure removal type fileds to Extended CSD | expand

Commit Message

Jungseung Lee Aug. 8, 2019, 9:23 a.m. UTC 
Display secure removal type when printing Extended CSD
Example:
	# mmc extcsd read /dev/mmcblk0
	...
        Secure Removal Type [SECURE_REMOVAL_TYPE]: 0x39
         information is configured to be removed using a vendor defined
         Supported Secure Removal Type:
          information removed by an erase of the physical memory
          information removed using a vendor defined

Signed-off-by: Jungseung Lee <js07.lee@samsung.com>
---
 mmc.h      |  3 +++
 mmc_cmds.c | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

Comments

Avri Altman Aug. 8, 2019, 10:15 a.m. UTC | #1 
> 
> Display secure removal type when printing Extended CSD
> Example:
> 	# mmc extcsd read /dev/mmcblk0
> 	...
>         Secure Removal Type [SECURE_REMOVAL_TYPE]: 0x39
>          information is configured to be removed using a vendor defined
>          Supported Secure Removal Type:
>           information removed by an erase of the physical memory
>           information removed using a vendor defined
> 
> Signed-off-by: Jungseung Lee <js07.lee@samsung.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
diff mbox series

Patch

diff --git a/mmc.h b/mmc.h
index 285c1f1..648fb26 100644
--- a/mmc.h
+++ b/mmc.h
@@ -116,6 +116,7 @@ 
 #define EXT_CSD_MODE_CONFIG		30
 #define EXT_CSD_MODE_OPERATION_CODES	29	/* W */
 #define EXT_CSD_FFU_STATUS		26	/* R */
+#define EXT_CSD_SECURE_REMOVAL_TYPE	16	/* R/W */
 #define EXT_CSD_CMDQ_MODE_EN		15	/* R/W */
 
 /*
@@ -132,6 +133,8 @@ 
 /*
  * EXT_CSD field definitions
  */
+#define EXT_CSD_CONFIG_SECRM_TYPE	(0x30)
+#define EXT_CSD_SUPPORTED_SECRM_TYPE	(0x0f)
 #define EXT_CSD_FFU_INSTALL		(0x01)
 #define EXT_CSD_FFU_MODE		(0x01)
 #define EXT_CSD_NORMAL_MODE		(0x00)
diff --git a/mmc_cmds.c b/mmc_cmds.c
index 19a9da1..fb37189 100644
--- a/mmc_cmds.c
+++ b/mmc_cmds.c
@@ -1766,6 +1766,38 @@  int do_read_extcsd(int nargs, char **argv)
 			ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B]);
 		printf("eMMC Pre EOL information [EXT_CSD_PRE_EOL_INFO]: 0x%02x\n",
 			ext_csd[EXT_CSD_PRE_EOL_INFO]);
+		reg = ext_csd[EXT_CSD_SECURE_REMOVAL_TYPE];
+		printf("Secure Removal Type [SECURE_REMOVAL_TYPE]: 0x%02x\n", reg);
+		printf(" information is configured to be removed ");
+		/* Bit [5:4]: Configure Secure Removal Type */
+		switch ((reg & EXT_CSD_CONFIG_SECRM_TYPE) >> 4) {
+			case 0x0:
+				printf("by an erase of the physical memory\n");
+				break;
+			case 0x1:
+				printf("by an overwriting the addressed locations"
+				       " with a character followed by an erase\n");
+				break;
+			case 0x2:
+				printf("by an overwriting the addressed locations"
+				       " with a character, its complement, then a random character\n");
+				break;
+			case 0x3:
+				printf("using a vendor defined\n");
+				break;
+		}
+		/* Bit [3:0]: Supported Secure Removal Type */
+		printf(" Supported Secure Removal Type:\n");
+		if (reg & 0x01)
+			printf("  information removed by an erase of the physical memory\n");
+		if (reg & 0x02)
+			printf("  information removed by an overwriting the addressed locations"
+			       " with a character followed by an erase\n");
+		if (reg & 0x04)
+			printf("  information removed by an overwriting the addressed locations"
+			       " with a character, its complement, then a random character\n");
+		if (reg & 0x08)
+			printf("  information removed using a vendor defined\n");
 	}
 
 	if (ext_csd_rev >= 8) {