> > From: Kimito Sakata <kimito.sakata@xxxxxxxxxx> > > we have been using this erase feature for a while, but it is > still not merged into the upstream mmc-utils. Especially, for > the customer, every time when they update the mmc-utils, they > should re-install this patch again, let's try to make this > erase command upstreamed in the mmc-utils. > > We need to send 3 MMC commands and it is important that they > stay in sequence. Therefore we are using MMC_IOC_MULTI_CMD. > > Co-developed-by: Bean Huo <beanhuo@xxxxxxxxxx> > Signed-off-by: Bean Huo <beanhuo@xxxxxxxxxx> > Signed-off-by: Kimito Sakata <kimito.sakata@xxxxxxxxxx> > Reviewed-by: Kenneth Gibbons <kenny.gibbons@xxxxxxxxxx> > Reviewed-by: Avri Altman <avri.altman@xxxxxxx> This looks good to me. Thanks, Avri > > Changelog: > v3--v4: > 1. Replace unused pointer var with NULL. > 2. Added msg if ERASE_GROUP_DEF enabled for HC. > v2--v3: > 1. Remove redundant ifndef > > V1--V2: > 1. refactor Kimito's original patch > 2. change to use MMC_IOC_MULTI_CMD > 3. add checkup if eMMC devie supports secure erase/trim > --- > mmc.c | 8 +++ > mmc.h | 13 ++++- > mmc_cmds.c | 144 > +++++++++++++++++++++++++++++++++++++++++++++++++++++ > mmc_cmds.h | 1 + > 4 files changed, 165 insertions(+), 1 deletion(-) > > diff --git a/mmc.c b/mmc.c > index f3d724b..eb2638b 100644 > --- a/mmc.c > +++ b/mmc.c > @@ -229,6 +229,14 @@ static struct Command commands[] = { > "Run Field Firmware Update with <image name> on <device>.\n", > NULL > }, > + { do_erase, -4, > + "erase", "<type> " "<start address> " "<end address> " "<device>\n" > + "Send Erase CMD38 with specific argument to the <device>\n\n" > + "NOTE!: This will delete all user data in the specified region of the > device\n" > + "<type> must be: legacy | discard | secure-erase | " > + "secure-trim1 | secure-trim2 | trim \n", > + NULL > + }, > { 0, 0, 0, 0 } > }; > > diff --git a/mmc.h b/mmc.h > index 5754a9d..e9766d7 100644 > --- a/mmc.h > +++ b/mmc.h > @@ -35,7 +35,15 @@ > #define MMC_SET_WRITE_PROT 28 /* ac [31:0] data addr R1b */ > #define MMC_CLEAR_WRITE_PROT 29 /* ac [31:0] data addr R1b */ > #define MMC_SEND_WRITE_PROT_TYPE 31 /* ac [31:0] data addr R1 */ > - > +#define MMC_ERASE_GROUP_START 35 /* ac [31:0] data addr R1 */ > +#define MMC_ERASE_GROUP_END 36 /* ac [31:0] data addr R1 */ > +#define MMC_ERASE 38 /* ac [31] Secure request > + [30:16] set to 0 > + [15] Force Garbage Collect request > + [14:2] set to 0 > + [1] Discard Enable > + [0] Identify Write Blocks for > + Erase (or TRIM Enable) R1b */ > /* > * EXT_CSD fields > */ > @@ -62,6 +70,7 @@ > #define EXT_CSD_CACHE_SIZE_2 251 > #define EXT_CSD_CACHE_SIZE_1 250 > #define EXT_CSD_CACHE_SIZE_0 249 > +#define EXT_CSD_SEC_FEATURE_SUPPORT 231 > #define EXT_CSD_BOOT_INFO 228 /* R/W */ > #define EXT_CSD_HC_ERASE_GRP_SIZE 224 > #define EXT_CSD_HC_WP_GRP_SIZE 221 > @@ -190,6 +199,8 @@ > #define EXT_CSD_REV_V4_2 2 > #define EXT_CSD_REV_V4_1 1 > #define EXT_CSD_REV_V4_0 0 > +#define EXT_CSD_SEC_GB_CL_EN (1<<4) > +#define EXT_CSD_SEC_ER_EN (1<<0) > > > /* From kernel linux/mmc/core.h */ > diff --git a/mmc_cmds.c b/mmc_cmds.c > index 6c24cea..afa85b7 100644 > --- a/mmc_cmds.c > +++ b/mmc_cmds.c > @@ -2514,6 +2514,150 @@ int do_cache_dis(int nargs, char **argv) > return do_cache_ctrl(0, nargs, argv); > } > > +static int erase(int dev_fd, __u32 argin, __u32 start, __u32 end) > +{ > + int ret = 0; > + struct mmc_ioc_multi_cmd *multi_cmd; > + __u8 ext_csd[512]; > + > + > + ret = read_extcsd(dev_fd, ext_csd); > + if (ret) { > + fprintf(stderr, "Could not read EXT_CSD\n"); > + exit(1); > + } > + if (ext_csd[EXT_CSD_ERASE_GROUP_DEF] & 0x01) { > + fprintf(stderr, "High Capacity Erase Unit Size=%d bytes\n" \ > + "High Capacity Erase Timeout=%d ms\n" \ > + "High Capacity Write Protect Group Size=%d bytes\n", > + ext_csd[224]*0x80000, > + ext_csd[223]*300, > + ext_csd[221]*ext_csd[224]*0x80000); > + } > + > + multi_cmd = calloc(1, sizeof(struct mmc_ioc_multi_cmd) + > + 3 * sizeof(struct mmc_ioc_cmd)); > + if (!multi_cmd) { > + perror("Failed to allocate memory"); > + return -ENOMEM; > + } > + > + multi_cmd->num_of_cmds = 3; > + /* Set erase start address */ > + multi_cmd->cmds[0].opcode = MMC_ERASE_GROUP_START; > + multi_cmd->cmds[0].arg = start; > + multi_cmd->cmds[0].flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | > MMC_CMD_AC; > + multi_cmd->cmds[0].write_flag = 1; > + > + /* Set erase end address */ > + multi_cmd->cmds[1].opcode = MMC_ERASE_GROUP_END; > + multi_cmd->cmds[1].arg = end; > + multi_cmd->cmds[1].flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | > MMC_CMD_AC; > + multi_cmd->cmds[1].write_flag = 1; > + > + /* Send Erase Command */ > + multi_cmd->cmds[2].opcode = MMC_ERASE; > + multi_cmd->cmds[2].arg = argin; > + multi_cmd->cmds[2].cmd_timeout_ms = 300*255*255; > + multi_cmd->cmds[2].flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | > MMC_CMD_AC; > + multi_cmd->cmds[2].write_flag = 1; > + > + /* send erase cmd with multi-cmd */ > + ret = ioctl(dev_fd, MMC_IOC_MULTI_CMD, multi_cmd); > + if (ret) > + perror("Erase multi-cmd ioctl"); > + > + free(multi_cmd); > + return ret; > +} > + > +int do_erase(int nargs, char **argv) > +{ > + int dev_fd, ret; > + char *print_str; > + __u8 ext_csd[512], checkup_mask = 0; > + __u32 arg, start, end; > + > + if (nargs != 5) { > + fprintf(stderr, "Usage: erase <type> <start addr> <end addr> > </path/to/mmcblkX>\n"); > + exit(1); > + } > + > + if (strstr(argv[2], "0x") || strstr(argv[2], "0X")) > + start = strtol(argv[2], NULL, 16); > + else > + start = strtol(argv[2], NULL, 10); > + > + if (strstr(argv[3], "0x") || strstr(argv[3], "0X")) > + end = strtol(argv[3], NULL, 16); > + else > + end = strtol(argv[3], NULL, 10); > + > + if (end < start) { > + fprintf(stderr, "erase start [0x%08x] > erase end [0x%08x]\n", > + start, end); > + exit(1); > + } > + > + if (strcmp(argv[1], "legacy") == 0) { > + arg = 0x00000000; > + print_str = "Legacy Erase"; > + } else if (strcmp(argv[1], "discard") == 0) { > + arg = 0x00000003; > + print_str = "Discard"; > + } else if (strcmp(argv[1], "secure-erase") == 0) { > + print_str = "Secure Erase"; > + checkup_mask = EXT_CSD_SEC_ER_EN; > + arg = 0x80000000; > + } else if (strcmp(argv[1], "secure-trim1") == 0) { > + print_str = "Secure Trim Step 1"; > + checkup_mask = EXT_CSD_SEC_ER_EN | EXT_CSD_SEC_GB_CL_EN; > + arg = 0x80000001; > + } else if (strcmp(argv[1], "secure-trim2") == 0) { > + print_str = "Secure Trim Step 2"; > + checkup_mask = EXT_CSD_SEC_ER_EN | EXT_CSD_SEC_GB_CL_EN; > + arg = 0x80008000; > + } else if (strcmp(argv[1], "trim") == 0) { > + print_str = "Trim"; > + checkup_mask = EXT_CSD_SEC_GB_CL_EN; > + arg = 0x00000001; > + } else { > + fprintf(stderr, "Unknown erase type: %s\n", argv[1]); > + exit(1); > + } > + > + dev_fd = open(argv[4], O_RDWR); > + if (dev_fd < 0) { > + perror(argv[4]); > + exit(1); > + } > + > + if (checkup_mask) { > + ret = read_extcsd(dev_fd, ext_csd); > + if (ret) { > + fprintf(stderr, "Could not read EXT_CSD from %s\n", > + argv[4]); > + goto out; > + } > + if ((checkup_mask & ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) != > + checkup_mask) { > + fprintf(stderr, "%s is not supported in %s\n", > + print_str, argv[4]); > + ret = -ENOTSUP; > + goto out; > + } > + > + } > + printf("Executing %s from 0x%08x to 0x%08x\n", print_str, start, end); > + > + ret = erase(dev_fd, arg, start, end); > +out: > + printf(" %s %s!\n\n", print_str, ret ? "Failed" : "Succeed"); > + close(dev_fd); > + return ret; > +} > + > + > int do_ffu(int nargs, char **argv) > { > #ifndef MMC_IOC_MULTI_CMD > diff --git a/mmc_cmds.h b/mmc_cmds.h > index 9d3246c..8331ab2 100644 > --- a/mmc_cmds.h > +++ b/mmc_cmds.h > @@ -45,3 +45,4 @@ int do_ffu(int nargs, char **argv); > int do_read_scr(int argc, char **argv); > int do_read_cid(int argc, char **argv); > int do_read_csd(int argc, char **argv); > +int do_erase(int nargs, char **argv); > -- > 2.31.1