[U-Boot] [PATCH v3 00/18] Support for eMMC partitioning and related fixes
I have the need to hardware partition eMMC devices from U-Boot along with setting enhanced and reliable write attributes.
This series of patches adds this support to U-Boot via a new mmc API, a few new members of struct mmc and a new mmc sub-command. It also features several fixes to the eMMC hardware partition support. I have tested this with Micron eMMC 4.41 parts and it is working as expected.
This version of the patches just adds the missing signed-off-by tags.
The patch series is against u-boot.git master of a few minutes ago.
Diego Santa Cruz (18): mmc: show hardware partition sizes in mmcinfo output mmc: extend mmcinfo to show enhanced partition attribute mmc: make eMMC general purpose partition numbering match spec mmc: skip mmcinfo partition info processing for eMMC < 4.41 mmc: incomplete test to switch to high-capacity group size definitions mmc: computation of eMMC GP partition size was missing 512 KiB factor mmc: read the size of eMMC enhanced user data area mmc: display size and start of eMMC enhanced user data area in mmcinfo mmc: fix erase_grp_size computation with high-capacity size definition mmc: read the high capacity WP group size for eMMC mmc: show the erase group size and HC WP group size in mmcinfo output mmc: eMMC partitioning data is not effective till partitioning completed mmc: the ext_csd data may be used during init even if reading failed mmc: add API to do eMMC hardware partitioning mmc: add mmc hwpartition sub-command to do eMMC hardware partitioning mmc: extend the mmc hardware partitioning API with write reliability mmc: extend the mmc hwpartition sub-command to change write reliability mmc: extend mmcinfo output to show partition write reliability settings
common/cmd_mmc.c | 207 ++++++++++++++++++++++++++++++++++++++- drivers/mmc/mmc.c | 283 +++++++++++++++++++++++++++++++++++++++++++++++++---- include/mmc.h | 47 +++++++++- 3 files changed, 515 insertions(+), 22 deletions(-)
There is currently no command that will provide an overview of the hardware partitions present on an eMMC device, one has to switch to every partition via "mmc dev" and run mmcinfo for each to get the partition's capacity. This commit adds a few lines of output to mmcinfo with the sizes of the present partitions, like this:
Device: OMAP SD/MMC Manufacturer ID: fe OEM: 14e Name: MMC16 Tran Speed: 52000000 Rd Block Len: 512 MMC version 4.41 High Capacity: Yes Capacity: 13.8 GiB Bus Width: 4-bit User Capacity: 13.8 GiB Boot Capacity: 16 MiB RPMB Capacity: 128 KiB GP1 Capacity: 64 MiB GP2 Capacity: 64 MiB
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- common/cmd_mmc.c | 17 +++++++++++++++++ 1 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c index 4286e26..1a23b28 100644 --- a/common/cmd_mmc.c +++ b/common/cmd_mmc.c @@ -73,6 +73,8 @@ U_BOOT_CMD(
static void print_mmcinfo(struct mmc *mmc) { + int i; + printf("Device: %s\n", mmc->cfg->name); printf("Manufacturer ID: %x\n", mmc->cid[0] >> 24); printf("OEM: %x\n", (mmc->cid[0] >> 8) & 0xffff); @@ -91,6 +93,21 @@ static void print_mmcinfo(struct mmc *mmc) print_size(mmc->capacity, "\n");
printf("Bus Width: %d-bit\n", mmc->bus_width); + + if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) { + puts("User Capacity: "); + print_size(mmc->capacity_user, "\n"); + puts("Boot Capacity: "); + print_size(mmc->capacity_boot, "\n"); + puts("RPMB Capacity: "); + print_size(mmc->capacity_rpmb, "\n"); + for (i = 0; i < ARRAY_SIZE(mmc->capacity_gp); i++) { + if (mmc->capacity_gp[i]) { + printf("GP%i Capacity: ", i); + print_size(mmc->capacity_gp[i], "\n"); + } + } + } } static struct mmc *init_mmc_device(int dev, bool force_init) {
This extends the mmcinfo command's output to show which eMMC partitions have the enhanced attribute set. Note that the eMMC spec says that if the enhanced attribute is supported then the boot and RPMB partitions are of the enhanced type.
The output of mmcinfo becomes: Device: OMAP SD/MMC Manufacturer ID: fe OEM: 14e Name: MMC16 Tran Speed: 52000000 Rd Block Len: 512 MMC version 4.41 High Capacity: Yes Capacity: 13.8 GiB Bus Width: 4-bit User Capacity: 13.8 GiB ENH Boot Capacity: 16 MiB ENH RPMB Capacity: 128 KiB ENH GP1 Capacity: 64 MiB ENH GP2 Capacity: 64 MiB ENH
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- common/cmd_mmc.c | 14 ++++++++++---- drivers/mmc/mmc.c | 3 +++ include/mmc.h | 6 ++++++ 3 files changed, 19 insertions(+), 4 deletions(-)
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c index 1a23b28..56c8680 100644 --- a/common/cmd_mmc.c +++ b/common/cmd_mmc.c @@ -95,16 +95,22 @@ static void print_mmcinfo(struct mmc *mmc) printf("Bus Width: %d-bit\n", mmc->bus_width);
if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) { + bool has_enh = (mmc->part_support & ENHNCD_SUPPORT) != 0; puts("User Capacity: "); - print_size(mmc->capacity_user, "\n"); + print_size(mmc->capacity_user, + has_enh && (mmc->part_attr & EXT_CSD_ENH_USR) ? + " ENH\n" : "\n"); puts("Boot Capacity: "); - print_size(mmc->capacity_boot, "\n"); + print_size(mmc->capacity_boot, has_enh ? " ENH\n" : "\n"); puts("RPMB Capacity: "); - print_size(mmc->capacity_rpmb, "\n"); + print_size(mmc->capacity_rpmb, has_enh ? " ENH\n" : "\n"); for (i = 0; i < ARRAY_SIZE(mmc->capacity_gp); i++) { + bool is_enh = has_enh && + (mmc->part_attr & EXT_CSD_ENH_GP(i)); if (mmc->capacity_gp[i]) { printf("GP%i Capacity: ", i); - print_size(mmc->capacity_gp[i], "\n"); + print_size(mmc->capacity_gp[i], + is_enh ? " ENH\n" : "\n"); } } } diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 8436bc7..f1ec799 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1032,9 +1032,12 @@ static int mmc_startup(struct mmc *mmc) }
/* store the partition info of emmc */ + mmc->part_support = ext_csd[EXT_CSD_PARTITIONING_SUPPORT]; if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) || ext_csd[EXT_CSD_BOOT_MULT]) mmc->part_config = ext_csd[EXT_CSD_PART_CONF]; + if (ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & ENHNCD_SUPPORT) + mmc->part_attr = ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE];
mmc->capacity_boot = ext_csd[EXT_CSD_BOOT_MULT] << 17;
diff --git a/include/mmc.h b/include/mmc.h index adffc35..7b4aebf 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -197,6 +197,9 @@ #define EXT_CSD_BOOT_BUS_WIDTH_RESET(x) (x << 2) #define EXT_CSD_BOOT_BUS_WIDTH_WIDTH(x) (x)
+#define EXT_CSD_ENH_USR (1 << 0) /* user data area is enhanced */ +#define EXT_CSD_ENH_GP(x) (1 << ((x)+1)) /* GP part (x+1) is enhanced */ + #define R1_ILLEGAL_COMMAND (1 << 22) #define R1_APP_CMD (1 << 5)
@@ -220,6 +223,7 @@ #define MMCPART_NOAVAILABLE (0xff) #define PART_ACCESS_MASK (0x7) #define PART_SUPPORT (0x1) +#define ENHNCD_SUPPORT (0x2) #define PART_ENH_ATTRIB (0x1f)
/* Maximum block size for MMC */ @@ -298,6 +302,8 @@ struct mmc { uint csd[4]; uint cid[4]; ushort rca; + u8 part_support; + u8 part_attr; char part_config; char part_num; uint tran_speed;
The eMMC spec numbers general purpose partitions starting at 1, but the mmcinfo output follows the internal numbering which starts at 0. Make the mmcinfo command output number partitions as in the eMMC spec to avoid confusion.
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- common/cmd_mmc.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c index 56c8680..414fac6 100644 --- a/common/cmd_mmc.c +++ b/common/cmd_mmc.c @@ -108,7 +108,7 @@ static void print_mmcinfo(struct mmc *mmc) bool is_enh = has_enh && (mmc->part_attr & EXT_CSD_ENH_GP(i)); if (mmc->capacity_gp[i]) { - printf("GP%i Capacity: ", i); + printf("GP%i Capacity: ", i+1); print_size(mmc->capacity_gp[i], is_enh ? " ENH\n" : "\n"); }
eMMC partitions are defined as of eMMC 4.41, but mmcinfo process partition info for eMMC >= 4.0, change it to do it for >= 4.41
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- common/cmd_mmc.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c index 414fac6..bc02273 100644 --- a/common/cmd_mmc.c +++ b/common/cmd_mmc.c @@ -94,7 +94,7 @@ static void print_mmcinfo(struct mmc *mmc)
printf("Bus Width: %d-bit\n", mmc->bus_width);
- if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) { + if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4_41)) { bool has_enh = (mmc->part_support & ENHNCD_SUPPORT) != 0; puts("User Capacity: "); print_size(mmc->capacity_user,
The eMMC spec mandates that the high-capacity group size definitions should be enabled when the device is partitioned (by setting ERASE_GROUP_DEF in EXT_CSD). The current test to determine when this is required misses a few cases. In particular a device may have been partitioned without setting the enhanced attribute on any partition or partitioning may be completed without creating any extra partitions.
This change moves the code to set ERASE_GROUP_DEF to after reading all partition information. It is also enabled when PARTITIONING_SETTING_COMPLETED is set as it is necessary to enable ERASE_GROUP_DEF before setting that bit, so it means that the user previously switched to the high capacity definitions.
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- drivers/mmc/mmc.c | 51 +++++++++++++++++++++++++++++---------------------- include/mmc.h | 2 ++ 2 files changed, 31 insertions(+), 22 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index f1ec799..7f5614e 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -818,6 +818,7 @@ static int mmc_startup(struct mmc *mmc) ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN); ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, MMC_MAX_BLOCK_LEN); int timeout = 1000; + bool has_parts = false;
#ifdef CONFIG_MMC_SPI_CRC_ON if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */ @@ -1003,13 +1004,40 @@ static int mmc_startup(struct mmc *mmc) break; }
+ /* store the partition info of emmc */ + mmc->part_support = ext_csd[EXT_CSD_PARTITIONING_SUPPORT]; + if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) || + ext_csd[EXT_CSD_BOOT_MULT]) + mmc->part_config = ext_csd[EXT_CSD_PART_CONF]; + if (ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & ENHNCD_SUPPORT) + mmc->part_attr = ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE]; + + mmc->capacity_boot = ext_csd[EXT_CSD_BOOT_MULT] << 17; + + mmc->capacity_rpmb = ext_csd[EXT_CSD_RPMB_MULT] << 17; + + for (i = 0; i < 4; i++) { + int idx = EXT_CSD_GP_SIZE_MULT + i * 3; + mmc->capacity_gp[i] = (ext_csd[idx + 2] << 16) + + (ext_csd[idx + 1] << 8) + ext_csd[idx]; + mmc->capacity_gp[i] *= + ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; + mmc->capacity_gp[i] *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; + if (mmc->capacity_gp[i]) + has_parts = true; + } + /* * Host needs to enable ERASE_GRP_DEF bit if device is * partitioned. This bit will be lost every time after a reset * or power off. This will affect erase size. */ + if (ext_csd[EXT_CSD_PART_SETTING_COMPLETED] & PART_SETTING_COMPLETED) + has_parts = true; if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) && - (ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE] & PART_ENH_ATTRIB)) { + (ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE] & PART_ENH_ATTRIB)) + has_parts = true; + if (has_parts) { err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_ERASE_GROUP_DEF, 1);
@@ -1030,27 +1058,6 @@ static int mmc_startup(struct mmc *mmc) mmc->erase_grp_size = (erase_gsz + 1) * (erase_gmul + 1); } - - /* store the partition info of emmc */ - mmc->part_support = ext_csd[EXT_CSD_PARTITIONING_SUPPORT]; - if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) || - ext_csd[EXT_CSD_BOOT_MULT]) - mmc->part_config = ext_csd[EXT_CSD_PART_CONF]; - if (ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & ENHNCD_SUPPORT) - mmc->part_attr = ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE]; - - mmc->capacity_boot = ext_csd[EXT_CSD_BOOT_MULT] << 17; - - mmc->capacity_rpmb = ext_csd[EXT_CSD_RPMB_MULT] << 17; - - for (i = 0; i < 4; i++) { - int idx = EXT_CSD_GP_SIZE_MULT + i * 3; - mmc->capacity_gp[i] = (ext_csd[idx + 2] << 16) + - (ext_csd[idx + 1] << 8) + ext_csd[idx]; - mmc->capacity_gp[i] *= - ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; - mmc->capacity_gp[i] *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; - } }
err = mmc_set_capacity(mmc, mmc->part_num); diff --git a/include/mmc.h b/include/mmc.h index 7b4aebf..9bf6b20 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -147,6 +147,7 @@ * EXT_CSD fields */ #define EXT_CSD_GP_SIZE_MULT 143 /* R/W */ +#define EXT_CSD_PART_SETTING_COMPLETED 155 /* R/W */ #define EXT_CSD_PARTITIONS_ATTRIBUTE 156 /* R/W */ #define EXT_CSD_PARTITIONING_SUPPORT 160 /* RO */ #define EXT_CSD_RST_N_FUNCTION 162 /* R/W */ @@ -220,6 +221,7 @@ #define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) #define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
+#define PART_SETTING_COMPLETED (1 << 0) #define MMCPART_NOAVAILABLE (0xff) #define PART_ACCESS_MASK (0x7) #define PART_SUPPORT (0x1)
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- drivers/mmc/mmc.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 7f5614e..62b945c 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1023,6 +1023,7 @@ static int mmc_startup(struct mmc *mmc) mmc->capacity_gp[i] *= ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; mmc->capacity_gp[i] *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; + mmc->capacity_gp[i] <<= 19; if (mmc->capacity_gp[i]) has_parts = true; }
This modification reads the size of the eMMC enhanced user data area upon initialization of an mmc device, it will be used later by mmcinfo.
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- drivers/mmc/mmc.c | 15 +++++++++++++++ include/mmc.h | 4 ++++ 2 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 62b945c..7efa358 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1028,6 +1028,21 @@ static int mmc_startup(struct mmc *mmc) has_parts = true; }
+ mmc->enh_user_size = + (ext_csd[EXT_CSD_ENH_SIZE_MULT+2] << 16) + + (ext_csd[EXT_CSD_ENH_SIZE_MULT+1] << 8) + + ext_csd[EXT_CSD_ENH_SIZE_MULT]; + mmc->enh_user_size *= ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; + mmc->enh_user_size *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; + mmc->enh_user_size <<= 19; + mmc->enh_user_start = + (ext_csd[EXT_CSD_ENH_START_ADDR+3] << 24) + + (ext_csd[EXT_CSD_ENH_START_ADDR+2] << 16) + + (ext_csd[EXT_CSD_ENH_START_ADDR+1] << 8) + + ext_csd[EXT_CSD_ENH_START_ADDR]; + if (mmc->high_capacity) + mmc->enh_user_start <<= 9; + /* * Host needs to enable ERASE_GRP_DEF bit if device is * partitioned. This bit will be lost every time after a reset diff --git a/include/mmc.h b/include/mmc.h index 9bf6b20..d1d8ba1 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -146,6 +146,8 @@ /* * EXT_CSD fields */ +#define EXT_CSD_ENH_START_ADDR 136 /* R/W */ +#define EXT_CSD_ENH_SIZE_MULT 140 /* R/W */ #define EXT_CSD_GP_SIZE_MULT 143 /* R/W */ #define EXT_CSD_PART_SETTING_COMPLETED 155 /* R/W */ #define EXT_CSD_PARTITIONS_ATTRIBUTE 156 /* R/W */ @@ -317,6 +319,8 @@ struct mmc { u64 capacity_boot; u64 capacity_rpmb; u64 capacity_gp[4]; + u64 enh_user_start; + u64 enh_user_size; block_dev_desc_t block_dev; char op_cond_pending; /* 1 if we are waiting on an op_cond command */ char init_in_progress; /* 1 if we have done mmc_start_init() */
This adds output to show the eMMC enhanced user data area size and offset along with the partition sizes in mmcinfo's output.
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- common/cmd_mmc.c | 11 ++++++++--- 1 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c index bc02273..aa5ba0e 100644 --- a/common/cmd_mmc.c +++ b/common/cmd_mmc.c @@ -96,10 +96,15 @@ static void print_mmcinfo(struct mmc *mmc)
if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4_41)) { bool has_enh = (mmc->part_support & ENHNCD_SUPPORT) != 0; + bool usr_enh = has_enh && (mmc->part_attr & EXT_CSD_ENH_USR); puts("User Capacity: "); - print_size(mmc->capacity_user, - has_enh && (mmc->part_attr & EXT_CSD_ENH_USR) ? - " ENH\n" : "\n"); + print_size(mmc->capacity_user, usr_enh ? " ENH\n" : "\n"); + if (usr_enh) { + puts("User Enhanced Start: "); + print_size(mmc->enh_user_start, "\n"); + puts("User Enhanced Size: "); + print_size(mmc->enh_user_size, "\n"); + } puts("Boot Capacity: "); print_size(mmc->capacity_boot, has_enh ? " ENH\n" : "\n"); puts("RPMB Capacity: ");
The erase_grp_size in struct mmc is to be a size in 512-byte sectors but the code used to compute it for eMMC when EXT_CSD_ERASE_GROUP_DEF is enabled computed it as bytes, leading to erase sizes and alignment much larger than what is actually required by the mmc device.
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- drivers/mmc/mmc.c | 3 +-- include/mmc.h | 2 +- 2 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 7efa358..8297bae 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1064,8 +1064,7 @@ static int mmc_startup(struct mmc *mmc)
/* Read out group size from ext_csd */ mmc->erase_grp_size = - ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * - MMC_MAX_BLOCK_LEN * 1024; + ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 1024; } else { /* Calculate the group size from the csd value. */ int erase_gsz, erase_gmul; diff --git a/include/mmc.h b/include/mmc.h index d1d8ba1..22506c3 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -313,7 +313,7 @@ struct mmc { uint tran_speed; uint read_bl_len; uint write_bl_len; - uint erase_grp_size; + uint erase_grp_size; /* in 512-byte sectors */ u64 capacity; u64 capacity_user; u64 capacity_boot;
Read the eMMC high capacity write protect group size at mmc device initialization. This is useful to correctly partition an eMMC device, as partitions need to be aligned to this size.
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- drivers/mmc/mmc.c | 6 ++++++ include/mmc.h | 1 + 2 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 8297bae..fda0cb4 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1061,7 +1061,9 @@ static int mmc_startup(struct mmc *mmc) return err; else ext_csd[EXT_CSD_ERASE_GROUP_DEF] = 1; + }
+ if (ext_csd[EXT_CSD_ERASE_GROUP_DEF] & 0x01) { /* Read out group size from ext_csd */ mmc->erase_grp_size = ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 1024; @@ -1073,6 +1075,10 @@ static int mmc_startup(struct mmc *mmc) mmc->erase_grp_size = (erase_gsz + 1) * (erase_gmul + 1); } + + mmc->hc_wp_grp_size = 1024 + * ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] + * ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; }
err = mmc_set_capacity(mmc, mmc->part_num); diff --git a/include/mmc.h b/include/mmc.h index 22506c3..f329b34 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -314,6 +314,7 @@ struct mmc { uint read_bl_len; uint write_bl_len; uint erase_grp_size; /* in 512-byte sectors */ + uint hc_wp_grp_size; /* in 512-byte sectors */ u64 capacity; u64 capacity_user; u64 capacity_boot;
This adds the erase group size and high-capacity WP group size to mmcinfo's output. The erase group size is necessary to properly align erase requests on eMMC. The high-capacity WP group size is necessary to properly align partitions on eMMC.
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- common/cmd_mmc.c | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c index aa5ba0e..7b7167c 100644 --- a/common/cmd_mmc.c +++ b/common/cmd_mmc.c @@ -94,9 +94,16 @@ static void print_mmcinfo(struct mmc *mmc)
printf("Bus Width: %d-bit\n", mmc->bus_width);
+ puts("Erase Group Size: "); + print_size(((u64)mmc->erase_grp_size) << 9, "\n"); + if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4_41)) { bool has_enh = (mmc->part_support & ENHNCD_SUPPORT) != 0; bool usr_enh = has_enh && (mmc->part_attr & EXT_CSD_ENH_USR); + + puts("HC WP Group Size: "); + print_size(((u64)mmc->hc_wp_grp_size) << 9, "\n"); + puts("User Capacity: "); print_size(mmc->capacity_user, usr_enh ? " ENH\n" : "\n"); if (usr_enh) { @@ -105,10 +112,13 @@ static void print_mmcinfo(struct mmc *mmc) puts("User Enhanced Size: "); print_size(mmc->enh_user_size, "\n"); } + puts("Boot Capacity: "); print_size(mmc->capacity_boot, has_enh ? " ENH\n" : "\n"); + puts("RPMB Capacity: "); print_size(mmc->capacity_rpmb, has_enh ? " ENH\n" : "\n"); + for (i = 0; i < ARRAY_SIZE(mmc->capacity_gp); i++) { bool is_enh = has_enh && (mmc->part_attr & EXT_CSD_ENH_GP(i));
The eMMC spec says that partitioning is only effective after the PARTITION_SETTING_COMPLETED is set in EXT_CSD (and a power cycle was done, but that we cannot know). Thus the partition sizes and attributes should be ignored when that bit is not set, otherwise the various capacities are not coherent (e.g., the user data capacity will be that of the unpartitioned device while partition sizes would be non-zero).
Prescence of non-zero partitioning data is nevertheless still used to activate the high-capacity size definitions (EXT_CSD_ERASE_GROUP_DEF) as it is necessary to set that to write any of the partitioning fields in EXT_CSD, so having partitioning data means someone previously activated that and we should keep it activated.
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- drivers/mmc/mmc.c | 53 ++++++++++++++++++++++++++++++++++------------------- 1 files changed, 34 insertions(+), 19 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index fda0cb4..dc8f830 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -819,6 +819,7 @@ static int mmc_startup(struct mmc *mmc) ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, MMC_MAX_BLOCK_LEN); int timeout = 1000; bool has_parts = false; + bool part_completed;
#ifdef CONFIG_MMC_SPI_CRC_ON if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */ @@ -1004,12 +1005,21 @@ static int mmc_startup(struct mmc *mmc) break; }
+ /* The partition data may be non-zero but it is only + * effective if PARTITION_SETTING_COMPLETED is set in + * EXT_CSD, so ignore any data if this bit is not set, + * except for enabling the high-capacity group size + * definition (see below). */ + part_completed = !!(ext_csd[EXT_CSD_PART_SETTING_COMPLETED] & + PART_SETTING_COMPLETED); + /* store the partition info of emmc */ mmc->part_support = ext_csd[EXT_CSD_PARTITIONING_SUPPORT]; if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) || ext_csd[EXT_CSD_BOOT_MULT]) mmc->part_config = ext_csd[EXT_CSD_PART_CONF]; - if (ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & ENHNCD_SUPPORT) + if (part_completed && + (ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & ENHNCD_SUPPORT)) mmc->part_attr = ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE];
mmc->capacity_boot = ext_csd[EXT_CSD_BOOT_MULT] << 17; @@ -1018,37 +1028,42 @@ static int mmc_startup(struct mmc *mmc)
for (i = 0; i < 4; i++) { int idx = EXT_CSD_GP_SIZE_MULT + i * 3; - mmc->capacity_gp[i] = (ext_csd[idx + 2] << 16) + + uint mult = (ext_csd[idx + 2] << 16) + (ext_csd[idx + 1] << 8) + ext_csd[idx]; + if (mult) + has_parts = true; + if (!part_completed) + continue; + mmc->capacity_gp[i] = mult; mmc->capacity_gp[i] *= ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; mmc->capacity_gp[i] *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; mmc->capacity_gp[i] <<= 19; - if (mmc->capacity_gp[i]) - has_parts = true; }
- mmc->enh_user_size = - (ext_csd[EXT_CSD_ENH_SIZE_MULT+2] << 16) + - (ext_csd[EXT_CSD_ENH_SIZE_MULT+1] << 8) + - ext_csd[EXT_CSD_ENH_SIZE_MULT]; - mmc->enh_user_size *= ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; - mmc->enh_user_size *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; - mmc->enh_user_size <<= 19; - mmc->enh_user_start = - (ext_csd[EXT_CSD_ENH_START_ADDR+3] << 24) + - (ext_csd[EXT_CSD_ENH_START_ADDR+2] << 16) + - (ext_csd[EXT_CSD_ENH_START_ADDR+1] << 8) + - ext_csd[EXT_CSD_ENH_START_ADDR]; - if (mmc->high_capacity) - mmc->enh_user_start <<= 9; + if (part_completed) { + mmc->enh_user_size = + (ext_csd[EXT_CSD_ENH_SIZE_MULT+2] << 16) + + (ext_csd[EXT_CSD_ENH_SIZE_MULT+1] << 8) + + ext_csd[EXT_CSD_ENH_SIZE_MULT]; + mmc->enh_user_size *= ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; + mmc->enh_user_size *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; + mmc->enh_user_size <<= 19; + mmc->enh_user_start = + (ext_csd[EXT_CSD_ENH_START_ADDR+3] << 24) + + (ext_csd[EXT_CSD_ENH_START_ADDR+2] << 16) + + (ext_csd[EXT_CSD_ENH_START_ADDR+1] << 8) + + ext_csd[EXT_CSD_ENH_START_ADDR]; + if (mmc->high_capacity) + mmc->enh_user_start <<= 9; + }
/* * Host needs to enable ERASE_GRP_DEF bit if device is * partitioned. This bit will be lost every time after a reset * or power off. This will affect erase size. */ - if (ext_csd[EXT_CSD_PART_SETTING_COMPLETED] & PART_SETTING_COMPLETED) + if (part_completed) has_parts = true; if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) && (ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE] & PART_ENH_ATTRIB))
The mmc_startup() function uses the ext_csd data even if reading it from the mmc device failed. This bug was introduced in commit bc897b1d4d86597311430dbe7b3e6c807c8c53e5. We now bail out if reading it fails, this should not be a problem as ext_csd was introduced in MMC 4.0 and this code is conditional on MMC >= 4.0.
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- drivers/mmc/mmc.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index dc8f830..d208118 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -972,7 +972,9 @@ static int mmc_startup(struct mmc *mmc) if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) { /* check ext_csd version and capacity */ err = mmc_send_ext_csd(mmc, ext_csd); - if (!err && (ext_csd[EXT_CSD_REV] >= 2)) { + if (err) + return err; + if (ext_csd[EXT_CSD_REV] >= 2) { /* * According to the JEDEC Standard, the value of * ext_csd's capacity is valid if the value is more
This adds an API to do hardware partitioning on eMMC devices. The new mmc_hwpart_config() function does the partitioning in one go. As the different attributes and partitioning options on eMMC may be interdependent validation has to be done based on the complete partitioning configuration. The function accepts three modes:
- MMC_HWPART_CONF_CHECK: just validates that the configuration is valid. - MMC_HWPART_CONF_SET: validates and sets all the fields in EXT_CSD but without setting the "partitioning completed" bit, and thus is reversible. - MMC_HWPART_CONF_COMPLETE: does everything and is thus not reversible.
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- drivers/mmc/mmc.c | 154 +++++++++++++++++++++++++++++++++++++++++++++++++++++ include/mmc.h | 20 +++++++ 2 files changed, 174 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index d208118..058f347 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -605,6 +605,160 @@ int mmc_switch_part(int dev_num, unsigned int part_num) return ret; }
+int mmc_hwpart_config(struct mmc *mmc, + const struct mmc_hwpart_conf *conf, + enum mmc_hwpart_conf_mode mode) +{ + u8 part_attrs = 0; + u32 enh_size_mult; + u32 enh_start_addr; + u32 gp_size_mult[4]; + u32 max_enh_size_mult; + u32 tot_enh_size_mult = 0; + int i, pidx, err; + ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN); + + if (mode < MMC_HWPART_CONF_CHECK || mode > MMC_HWPART_CONF_COMPLETE) + return -EINVAL; + + if (IS_SD(mmc) || (mmc->version < MMC_VERSION_4_41)) { + printf("eMMC >= 4.4 required for enhanced user data area\n"); + return -EMEDIUMTYPE; + } + + if ( ! (mmc->part_support & PART_SUPPORT) ) { + printf("Card does not support partitioning\n"); + return -EMEDIUMTYPE; + } + + if ( ! mmc->hc_wp_grp_size ) { + printf("Card does not define HC WP group size\n"); + return -EMEDIUMTYPE; + } + + /* check partition alignment and total enhanced size */ + if (conf->user.enh_size) { + if (conf->user.enh_size % mmc->hc_wp_grp_size || + conf->user.enh_start % mmc->hc_wp_grp_size) { + printf("User data enhanced area not HC WP group " + "size aligned\n"); + return -EINVAL; + } + part_attrs |= EXT_CSD_ENH_USR; + enh_size_mult = conf->user.enh_size / mmc->hc_wp_grp_size; + if (mmc->high_capacity) { + enh_start_addr = conf->user.enh_start; + } else { + enh_start_addr = (conf->user.enh_start << 9); + } + } else { + enh_size_mult = 0; + enh_start_addr = 0; + } + tot_enh_size_mult += enh_size_mult; + + for (pidx = 0; pidx < 4; pidx++) { + if (conf->gp_part[pidx].size % mmc->hc_wp_grp_size) { + printf("GP%i partition not HC WP group size " + "aligned\n", pidx+1); + return -EINVAL; + } + gp_size_mult[pidx] = conf->gp_part[pidx].size / mmc->hc_wp_grp_size; + if (conf->gp_part[pidx].size && conf->gp_part[pidx].enhanced) { + part_attrs |= EXT_CSD_ENH_GP(pidx); + tot_enh_size_mult += gp_size_mult[pidx]; + } + } + + if (part_attrs && ! (mmc->part_support & ENHNCD_SUPPORT)) { + printf("Card does not support enhanced attribute\n"); + return -EMEDIUMTYPE; + } + + err = mmc_send_ext_csd(mmc, ext_csd); + if (err) + return err; + + max_enh_size_mult = + (ext_csd[EXT_CSD_MAX_ENH_SIZE_MULT+2] << 16) + + (ext_csd[EXT_CSD_MAX_ENH_SIZE_MULT+1] << 8) + + ext_csd[EXT_CSD_MAX_ENH_SIZE_MULT]; + if (tot_enh_size_mult > max_enh_size_mult) { + printf("Total enhanced size exceeds maximum (%u > %u)\n", + tot_enh_size_mult, max_enh_size_mult); + return -EMEDIUMTYPE; + } + + if (ext_csd[EXT_CSD_PART_SETTING_COMPLETED] & PART_SETTING_COMPLETED) { + printf("Card already partitioned\n"); + return -EPERM; + } + + if (mode == MMC_HWPART_CONF_CHECK) + return 0; + + /* Partitioning requires high-capacity size definitions */ + if ( ! (ext_csd[EXT_CSD_ERASE_GROUP_DEF] & 0x01) ) { + err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_ERASE_GROUP_DEF, 1); + + if (err) + return err; + + ext_csd[EXT_CSD_ERASE_GROUP_DEF] = 1; + + /* update erase group size to be high-capacity */ + mmc->erase_grp_size = + ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 1024; + + } + + /* all OK, write the configuration */ + for (i = 0; i < 4; i++) { + err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_ENH_START_ADDR+i, + (enh_start_addr >> (i*8)) & 0xFF); + if (err) + return err; + } + for (i = 0; i < 3; i++) { + err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_ENH_SIZE_MULT+i, + (enh_size_mult >> (i*8)) & 0xFF); + if (err) + return err; + } + for (pidx = 0; pidx < 4; pidx++) { + for (i = 0; i < 3; i++) { + err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_GP_SIZE_MULT+pidx*3+i, + (gp_size_mult[pidx] >> (i*8)) & 0xFF); + if (err) + return err; + } + } + err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_PARTITIONS_ATTRIBUTE, part_attrs); + if (err) + return err; + + if (mode == MMC_HWPART_CONF_SET) + return 0; + + /* Setting PART_SETTING_COMPLETED confirms the partition + * configuration but it only becomes effective after power + * cycle, so we do not adjust the partition related settings + * in the mmc struct. */ + + err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_PART_SETTING_COMPLETED, + PART_SETTING_COMPLETED); + if (err) + return err; + + return 0; +} + int mmc_getcd(struct mmc *mmc) { int cd; diff --git a/include/mmc.h b/include/mmc.h index f329b34..9f9e6f7 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -151,6 +151,7 @@ #define EXT_CSD_GP_SIZE_MULT 143 /* R/W */ #define EXT_CSD_PART_SETTING_COMPLETED 155 /* R/W */ #define EXT_CSD_PARTITIONS_ATTRIBUTE 156 /* R/W */ +#define EXT_CSD_MAX_ENH_SIZE_MULT 157 /* R */ #define EXT_CSD_PARTITIONING_SUPPORT 160 /* RO */ #define EXT_CSD_RST_N_FUNCTION 162 /* R/W */ #define EXT_CSD_RPMB_MULT 168 /* RO */ @@ -329,6 +330,23 @@ struct mmc { uint op_cond_response; /* the response byte from the last op_cond */ };
+struct mmc_hwpart_conf { + struct { + uint enh_start; /* in 512-byte sectors */ + uint enh_size; /* in 512-byte sectors, if 0 no enh area */ + } user; + struct { + uint size; /* in 512-byte sectors */ + int enhanced; + } gp_part[4]; +}; + +enum mmc_hwpart_conf_mode { + MMC_HWPART_CONF_CHECK, + MMC_HWPART_CONF_SET, + MMC_HWPART_CONF_COMPLETE, +}; + int mmc_register(struct mmc *mmc); struct mmc *mmc_create(const struct mmc_config *cfg, void *priv); void mmc_destroy(struct mmc *mmc); @@ -341,6 +359,8 @@ int mmc_set_dev(int dev_num); void print_mmc_devices(char separator); int get_mmc_num(void); int mmc_switch_part(int dev_num, unsigned int part_num); +int mmc_hwpart_config(struct mmc *mmc, const struct mmc_hwpart_conf *conf, + enum mmc_hwpart_conf_mode mode); int mmc_getcd(struct mmc *mmc); int board_mmc_getcd(struct mmc *mmc); int mmc_getwp(struct mmc *mmc);
Adds the mmc hwpartition sub-command to perform eMMC hardware partitioning on an mmc device. The number of arguments can be large for a complex partitioning, but as the partitioning has to be done in one go it is difficult to make it simpler.
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- common/cmd_mmc.c | 93 +++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 files changed, 92 insertions(+), 1 deletions(-)
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c index 7b7167c..c0a4a3e 100644 --- a/common/cmd_mmc.c +++ b/common/cmd_mmc.c @@ -481,6 +481,91 @@ static int do_mmc_list(cmd_tbl_t *cmdtp, int flag, print_mmc_devices('\n'); return CMD_RET_SUCCESS; } + +static int do_mmc_hwpartition(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + struct mmc *mmc; + struct mmc_hwpart_conf pconf = { }; + enum mmc_hwpart_conf_mode mode = MMC_HWPART_CONF_CHECK; + int i, pidx; + + mmc = init_mmc_device(curr_device, false); + if (!mmc) + return CMD_RET_FAILURE; + + if (argc < 1) + return CMD_RET_USAGE; + i = 1; + while (i < argc) { + if (!strcmp(argv[i], "userenh")) { + if (i + 2 >= argc) + return CMD_RET_USAGE; + memset(&pconf.user, 0, sizeof(pconf.user)); + pconf.user.enh_start = + simple_strtoul(argv[i+1], NULL, 10); + pconf.user.enh_size = + simple_strtoul(argv[i+2], NULL, 10); + i += 3; + } else if (!strncmp(argv[i], "gp", 2) && + strlen(argv[i]) == 3 && + argv[i][2] >= '1' && argv[i][2] <= '4') { + if (i + 1 >= argc) + return CMD_RET_USAGE; + pidx = argv[i][2] - '1'; + memset(&pconf.gp_part[pidx], 0, + sizeof(pconf.gp_part[pidx])); + pconf.gp_part[pidx].size = + simple_strtoul(argv[i+1], NULL, 10); + i += 2; + if (i < argc && !strcmp(argv[i], "enh")) { + pconf.gp_part[pidx].enhanced = 1; + i++; + } + } else if (!strcmp(argv[i], "check")) { + mode = MMC_HWPART_CONF_CHECK; + i++; + } else if (!strcmp(argv[i], "set")) { + mode = MMC_HWPART_CONF_SET; + i++; + } else if (!strcmp(argv[i], "complete")) { + mode = MMC_HWPART_CONF_COMPLETE; + i++; + } else { + return CMD_RET_USAGE; + } + } + + puts("Partition configuration:\n"); + if (pconf.user.enh_size) { + puts("\tUser Enhanced Start: "); + print_size(((u64)pconf.user.enh_start) << 9, "\n"); + puts("\tUser Enhanced Size: "); + print_size(((u64)pconf.user.enh_size) << 9, "\n"); + } else { + puts("\tNo enhanced user data area\n"); + } + for (pidx = 0; pidx < 4; pidx++) { + if (pconf.gp_part[pidx].size) { + printf("\tGP%i Capacity: ", pidx+1); + print_size(((u64)pconf.gp_part[pidx].size) << 9, + pconf.gp_part[pidx].enhanced ? + " ENH\n" : "\n"); + } else { + printf("\tNo GP%i partition\n", pidx+1); + } + } + + if (!mmc_hwpart_config(mmc, &pconf, mode)) { + if (mode == MMC_HWPART_CONF_COMPLETE) + puts("Partitioning successful, " + "power-cycle to make effective\n"); + return CMD_RET_SUCCESS; + } else { + return CMD_RET_FAILURE; + } +} + #ifdef CONFIG_SUPPORT_EMMC_BOOT static int do_mmc_bootbus(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) @@ -638,6 +723,7 @@ static cmd_tbl_t cmd_mmc[] = { U_BOOT_CMD_MKENT(part, 1, 1, do_mmc_part, "", ""), U_BOOT_CMD_MKENT(dev, 3, 0, do_mmc_dev, "", ""), U_BOOT_CMD_MKENT(list, 1, 1, do_mmc_list, "", ""), + U_BOOT_CMD_MKENT(hwpartition, 17, 0, do_mmc_hwpartition, "", ""), #ifdef CONFIG_SUPPORT_EMMC_BOOT U_BOOT_CMD_MKENT(bootbus, 5, 0, do_mmc_bootbus, "", ""), U_BOOT_CMD_MKENT(bootpart-resize, 4, 0, do_mmc_boot_resize, "", ""), @@ -677,7 +763,7 @@ static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) }
U_BOOT_CMD( - mmc, 7, 1, do_mmcops, + mmc, 18, 1, do_mmcops, "MMC sub system", "info - display info of the current MMC device\n" "mmc read addr blk# cnt\n" @@ -687,6 +773,11 @@ U_BOOT_CMD( "mmc part - lists available partition on current mmc device\n" "mmc dev [dev] [part] - show or set current mmc device [partition]\n" "mmc list - lists available devices\n" + "mmc hwpartition [args...] - does hardware partitioning\n" + " arguments (sizes in 512-byte blocks):\n" + " [userenh start cnt] - sets enhanced user data area\n" + " [gp1|gp2|gp3|gp4 cnt [enh]] - general purpose partition\n" + " [check|set|complete] - mode, complete set partitioning completed\n" #ifdef CONFIG_SUPPORT_EMMC_BOOT "mmc bootbus dev boot_bus_width reset_boot_bus_width boot_mode\n" " - Set the BOOT_BUS_WIDTH field of the specified device\n"
The eMMC partition write reliability settings are to be set while partitioning a device, as per the eMMC spec, so changes to these attributes needs to be done in the hardware partitioning API. This commit adds such support.
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- drivers/mmc/mmc.c | 39 +++++++++++++++++++++++++++++++++++++++ include/mmc.h | 13 ++++++++++++- 2 files changed, 51 insertions(+), 1 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 058f347..643a622 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -615,6 +615,7 @@ int mmc_hwpart_config(struct mmc *mmc, u32 gp_size_mult[4]; u32 max_enh_size_mult; u32 tot_enh_size_mult = 0; + u8 wr_rel_set; int i, pidx, err; ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
@@ -689,6 +690,33 @@ int mmc_hwpart_config(struct mmc *mmc, return -EMEDIUMTYPE; }
+ /* The default value of EXT_CSD_WR_REL_SET is device + * dependent, the values can only be changed if the + * EXT_CSD_HS_CTRL_REL bit is set. The values can be + * changed only once and before partitioning is completed. */ + wr_rel_set = ext_csd[EXT_CSD_WR_REL_SET]; + if (conf->user.wr_rel_change) { + if (conf->user.wr_rel_set) + wr_rel_set |= EXT_CSD_WR_DATA_REL_USR; + else + wr_rel_set &= ~EXT_CSD_WR_DATA_REL_USR; + } + for (pidx = 0; pidx < 4; pidx++) { + if (conf->gp_part[pidx].wr_rel_change) { + if (conf->gp_part[pidx].wr_rel_set) + wr_rel_set |= EXT_CSD_WR_DATA_REL_GP(pidx); + else + wr_rel_set &= ~EXT_CSD_WR_DATA_REL_GP(pidx); + } + } + + if (wr_rel_set != ext_csd[EXT_CSD_WR_REL_SET] && + !(ext_csd[EXT_CSD_WR_REL_PARAM] & EXT_CSD_HS_CTRL_REL)) { + puts("Card does not support host controlled partition write " + "reliability settings\n"); + return -EMEDIUMTYPE; + } + if (ext_csd[EXT_CSD_PART_SETTING_COMPLETED] & PART_SETTING_COMPLETED) { printf("Card already partitioned\n"); return -EPERM; @@ -745,6 +773,17 @@ int mmc_hwpart_config(struct mmc *mmc, if (mode == MMC_HWPART_CONF_SET) return 0;
+ /* The WR_REL_SET is a write-once register but shall be + * written before setting PART_SETTING_COMPLETED. As it is + * write-once we can only write it when completing the + * partitioning. */ + if (wr_rel_set != ext_csd[EXT_CSD_WR_REL_SET]) { + err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_WR_REL_SET, wr_rel_set); + if (err) + return err; + } + /* Setting PART_SETTING_COMPLETED confirms the partition * configuration but it only becomes effective after power * cycle, so we do not adjust the partition related settings diff --git a/include/mmc.h b/include/mmc.h index 9f9e6f7..b024f1c 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -154,6 +154,8 @@ #define EXT_CSD_MAX_ENH_SIZE_MULT 157 /* R */ #define EXT_CSD_PARTITIONING_SUPPORT 160 /* RO */ #define EXT_CSD_RST_N_FUNCTION 162 /* R/W */ +#define EXT_CSD_WR_REL_PARAM 166 /* R */ +#define EXT_CSD_WR_REL_SET 167 /* R/W */ #define EXT_CSD_RPMB_MULT 168 /* RO */ #define EXT_CSD_ERASE_GROUP_DEF 175 /* R/W */ #define EXT_CSD_BOOT_BUS_WIDTH 177 @@ -204,6 +206,11 @@ #define EXT_CSD_ENH_USR (1 << 0) /* user data area is enhanced */ #define EXT_CSD_ENH_GP(x) (1 << ((x)+1)) /* GP part (x+1) is enhanced */
+#define EXT_CSD_HS_CTRL_REL (1 << 0) /* host controlled WR_REL_SET */ + +#define EXT_CSD_WR_DATA_REL_USR (1 << 0) /* user data area WR_REL */ +#define EXT_CSD_WR_DATA_REL_GP(x) (1 << ((x)+1)) /* GP part (x+1) WR_REL */ + #define R1_ILLEGAL_COMMAND (1 << 22) #define R1_APP_CMD (1 << 5)
@@ -334,10 +341,14 @@ struct mmc_hwpart_conf { struct { uint enh_start; /* in 512-byte sectors */ uint enh_size; /* in 512-byte sectors, if 0 no enh area */ + unsigned wr_rel_change : 1; + unsigned wr_rel_set : 1; } user; struct { uint size; /* in 512-byte sectors */ - int enhanced; + unsigned enhanced : 1; + unsigned wr_rel_change : 1; + unsigned wr_rel_set : 1; } gp_part[4]; };
This change extends the mmc hwpartition sub-command to change the per-partition write reliability settings. It also changes the syntax used for the enhanced user data area slightly to better accomodate the write reliability option.
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- common/cmd_mmc.c | 116 ++++++++++++++++++++++++++++++++++++++++++----------- 1 files changed, 92 insertions(+), 24 deletions(-)
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c index c0a4a3e..e226598 100644 --- a/common/cmd_mmc.c +++ b/common/cmd_mmc.c @@ -482,13 +482,81 @@ static int do_mmc_list(cmd_tbl_t *cmdtp, int flag, return CMD_RET_SUCCESS; }
+static int parse_hwpart_user(struct mmc_hwpart_conf *pconf, + int argc, char * const argv[]) +{ + int i = 0; + + memset(&pconf->user, 0, sizeof(pconf->user)); + + while (i < argc) { + if (!strcmp(argv[i], "enh")) { + if (i + 2 >= argc) + return -1; + pconf->user.enh_start = + simple_strtoul(argv[i+1], NULL, 10); + pconf->user.enh_size = + simple_strtoul(argv[i+2], NULL, 10); + i += 3; + } else if (!strcmp(argv[i], "wrrel")) { + if (i + 1 >= argc) + return -1; + pconf->user.wr_rel_change = 1; + if (!strcmp(argv[i+1], "on")) + pconf->user.wr_rel_set = 1; + else if (!strcmp(argv[i+1], "off")) + pconf->user.wr_rel_set = 0; + else + return -1; + i += 2; + } else { + break; + } + } + return i; +} + +static int parse_hwpart_gp(struct mmc_hwpart_conf *pconf, int pidx, + int argc, char * const argv[]) +{ + int i; + + memset(&pconf->gp_part[pidx], 0, sizeof(pconf->gp_part[pidx])); + + if (1 >= argc) + return -1; + pconf->gp_part[pidx].size = simple_strtoul(argv[0], NULL, 10); + + i = 1; + while (i < argc) { + if (!strcmp(argv[i], "enh")) { + pconf->gp_part[pidx].enhanced = 1; + i += 1; + } else if (!strcmp(argv[i], "wrrel")) { + if (i + 1 >= argc) + return -1; + pconf->gp_part[pidx].wr_rel_change = 1; + if (!strcmp(argv[i+1], "on")) + pconf->gp_part[pidx].wr_rel_set = 1; + else if (!strcmp(argv[i+1], "off")) + pconf->gp_part[pidx].wr_rel_set = 0; + else + return -1; + i += 2; + } else { + break; + } + } + return i; +} + static int do_mmc_hwpartition(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { struct mmc *mmc; struct mmc_hwpart_conf pconf = { }; enum mmc_hwpart_conf_mode mode = MMC_HWPART_CONF_CHECK; - int i, pidx; + int i, r, pidx;
mmc = init_mmc_device(curr_device, false); if (!mmc) @@ -498,30 +566,21 @@ static int do_mmc_hwpartition(cmd_tbl_t *cmdtp, int flag, return CMD_RET_USAGE; i = 1; while (i < argc) { - if (!strcmp(argv[i], "userenh")) { - if (i + 2 >= argc) + if (!strcmp(argv[i], "user")) { + i++; + r = parse_hwpart_user(&pconf, argc-i, &argv[i]); + if (r < 0) return CMD_RET_USAGE; - memset(&pconf.user, 0, sizeof(pconf.user)); - pconf.user.enh_start = - simple_strtoul(argv[i+1], NULL, 10); - pconf.user.enh_size = - simple_strtoul(argv[i+2], NULL, 10); - i += 3; + i += r; } else if (!strncmp(argv[i], "gp", 2) && strlen(argv[i]) == 3 && argv[i][2] >= '1' && argv[i][2] <= '4') { - if (i + 1 >= argc) - return CMD_RET_USAGE; pidx = argv[i][2] - '1'; - memset(&pconf.gp_part[pidx], 0, - sizeof(pconf.gp_part[pidx])); - pconf.gp_part[pidx].size = - simple_strtoul(argv[i+1], NULL, 10); - i += 2; - if (i < argc && !strcmp(argv[i], "enh")) { - pconf.gp_part[pidx].enhanced = 1; - i++; - } + i++; + r = parse_hwpart_gp(&pconf, pidx, argc-i, &argv[i]); + if (r < 0) + return CMD_RET_USAGE; + i += r; } else if (!strcmp(argv[i], "check")) { mode = MMC_HWPART_CONF_CHECK; i++; @@ -545,6 +604,9 @@ static int do_mmc_hwpartition(cmd_tbl_t *cmdtp, int flag, } else { puts("\tNo enhanced user data area\n"); } + if (pconf.user.wr_rel_change) + printf("\tUser partition write reliability: %s\n", + pconf.user.wr_rel_set ? "on" : "off"); for (pidx = 0; pidx < 4; pidx++) { if (pconf.gp_part[pidx].size) { printf("\tGP%i Capacity: ", pidx+1); @@ -554,6 +616,9 @@ static int do_mmc_hwpartition(cmd_tbl_t *cmdtp, int flag, } else { printf("\tNo GP%i partition\n", pidx+1); } + if (pconf.gp_part[pidx].wr_rel_change) + printf("\tGP%i write reliability: %s\n", pidx+1, + pconf.gp_part[pidx].wr_rel_set ? "on" : "off"); }
if (!mmc_hwpart_config(mmc, &pconf, mode)) { @@ -562,6 +627,7 @@ static int do_mmc_hwpartition(cmd_tbl_t *cmdtp, int flag, "power-cycle to make effective\n"); return CMD_RET_SUCCESS; } else { + puts("Failed!\n"); return CMD_RET_FAILURE; } } @@ -723,7 +789,7 @@ static cmd_tbl_t cmd_mmc[] = { U_BOOT_CMD_MKENT(part, 1, 1, do_mmc_part, "", ""), U_BOOT_CMD_MKENT(dev, 3, 0, do_mmc_dev, "", ""), U_BOOT_CMD_MKENT(list, 1, 1, do_mmc_list, "", ""), - U_BOOT_CMD_MKENT(hwpartition, 17, 0, do_mmc_hwpartition, "", ""), + U_BOOT_CMD_MKENT(hwpartition, 28, 0, do_mmc_hwpartition, "", ""), #ifdef CONFIG_SUPPORT_EMMC_BOOT U_BOOT_CMD_MKENT(bootbus, 5, 0, do_mmc_bootbus, "", ""), U_BOOT_CMD_MKENT(bootpart-resize, 4, 0, do_mmc_boot_resize, "", ""), @@ -763,7 +829,7 @@ static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) }
U_BOOT_CMD( - mmc, 18, 1, do_mmcops, + mmc, 29, 1, do_mmcops, "MMC sub system", "info - display info of the current MMC device\n" "mmc read addr blk# cnt\n" @@ -775,9 +841,11 @@ U_BOOT_CMD( "mmc list - lists available devices\n" "mmc hwpartition [args...] - does hardware partitioning\n" " arguments (sizes in 512-byte blocks):\n" - " [userenh start cnt] - sets enhanced user data area\n" - " [gp1|gp2|gp3|gp4 cnt [enh]] - general purpose partition\n" + " [user [enh start cnt] [wrrel {on|off}]] - sets user data area attributes\n" + " [gp1|gp2|gp3|gp4 cnt [enh] [wrrel {on|off}]] - general purpose partition\n" " [check|set|complete] - mode, complete set partitioning completed\n" + " WARNING: Partitioning is a write-once setting once it is set to complete.\n" + " Power cycling is required to initialize partitions after set to complete.\n" #ifdef CONFIG_SUPPORT_EMMC_BOOT "mmc bootbus dev boot_bus_width reset_boot_bus_width boot_mode\n" " - Set the BOOT_BUS_WIDTH field of the specified device\n"
This extends the mmcinfo hardware partition info output to show partitions with write reliability enabled with the "WRREL" string. If the partition does not have write reliability enabled the "WRREL" string is omitted; this is analogous to the ehhanced attribute.
Example output:
Device: OMAP SD/MMC Manufacturer ID: fe OEM: 14e Name: MMC16 Tran Speed: 52000000 Rd Block Len: 512 MMC version 4.41 High Capacity: Yes Capacity: 13.8 GiB Bus Width: 4-bit Erase Group Size: 8 MiB HC WP Group Size: 16 MiB User Capacity: 13.8 GiB ENH WRREL User Enhanced Start: 0 Bytes User Enhanced Size: 512 MiB Boot Capacity: 16 MiB ENH RPMB Capacity: 128 KiB ENH GP1 Capacity: 64 MiB ENH WRREL GP2 Capacity: 64 MiB ENH WRREL
Signed-off-by: Diego Santa Cruz Diego.SantaCruz@spinetix.com --- common/cmd_mmc.c | 12 ++++++++++-- drivers/mmc/mmc.c | 2 ++ include/mmc.h | 1 + 3 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c index e226598..8ff2cdc 100644 --- a/common/cmd_mmc.c +++ b/common/cmd_mmc.c @@ -105,7 +105,11 @@ static void print_mmcinfo(struct mmc *mmc) print_size(((u64)mmc->hc_wp_grp_size) << 9, "\n");
puts("User Capacity: "); - print_size(mmc->capacity_user, usr_enh ? " ENH\n" : "\n"); + print_size(mmc->capacity_user, usr_enh ? " ENH" : ""); + if (mmc->wr_rel_set & EXT_CSD_WR_DATA_REL_USR) + puts(" WRREL\n"); + else + putc('\n'); if (usr_enh) { puts("User Enhanced Start: "); print_size(mmc->enh_user_start, "\n"); @@ -125,7 +129,11 @@ static void print_mmcinfo(struct mmc *mmc) if (mmc->capacity_gp[i]) { printf("GP%i Capacity: ", i+1); print_size(mmc->capacity_gp[i], - is_enh ? " ENH\n" : "\n"); + is_enh ? " ENH" : ""); + if (mmc->wr_rel_set & EXT_CSD_WR_DATA_REL_GP(i)) + puts(" WRREL\n"); + else + putc('\n'); } } } diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 643a622..afe1945 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1289,6 +1289,8 @@ static int mmc_startup(struct mmc *mmc) mmc->hc_wp_grp_size = 1024 * ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; + + mmc->wr_rel_set = ext_csd[EXT_CSD_WR_REL_SET]; }
err = mmc_set_capacity(mmc, mmc->part_num); diff --git a/include/mmc.h b/include/mmc.h index b024f1c..35c19ad 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -316,6 +316,7 @@ struct mmc { ushort rca; u8 part_support; u8 part_attr; + u8 wr_rel_set; char part_config; char part_num; uint tran_speed;
participants (1)
-
Diego Santa Cruz