@@ -28,7 +28,9 @@
#include <linux/firmware/trusted_foundations.h>
+#include <soc/tegra/bct.h>
#include <soc/tegra/fuse.h>
+#include <soc/tegra/partition_table.h>
#include <soc/tegra/pmc.h>
#include <asm/firmware.h>
@@ -63,9 +65,42 @@ u32 tegra_uart_config[3] = {
0,
};
+static void __init tegra_boot_config_table_init(void)
+{
+ void __iomem *bct_base;
+ u16 pt_addr, pt_size;
+
+ bct_base = IO_ADDRESS(TEGRA_IRAM_BASE) + TEGRA_IRAM_BCT_OFFSET;
+
+ if (of_machine_is_compatible("nvidia,tegra20")) {
+ struct tegra20_boot_config_table __iomem *t20_bct = bct_base;
+
+ if (t20_bct->boot_data_version != TEGRA_BOOTDATA_VERSION_T20)
+ return;
+
+ pt_addr = t20_bct->partition_table_logical_sector_address;
+ pt_size = t20_bct->partition_table_num_logical_sectors;
+ } else if (of_machine_is_compatible("nvidia,tegra30")) {
+ struct tegra30_boot_config_table __iomem *t30_bct = bct_base;
+
+ if (t30_bct->boot_data_version != TEGRA_BOOTDATA_VERSION_T30)
+ return;
+
+ pt_addr = t30_bct->partition_table_logical_sector_address;
+ pt_size = t30_bct->partition_table_num_logical_sectors;
+ } else {
+ return;
+ }
+
+ pr_info("%s: BCT found in IRAM\n", __func__);
+
+ tegra_partition_table_setup(pt_addr, pt_size);
+}
+
static void __init tegra_init_early(void)
{
of_register_trusted_foundations();
+ tegra_boot_config_table_init();
tegra_cpu_reset_handler_init();
call_firmware_op(l2x0_init);
}
@@ -268,3 +268,11 @@ config CMDLINE_PARTITION
help
Say Y here if you want to read the partition table from bootargs.
The format for the command line is just like mtdparts.
+
+config TEGRA_PARTITION
+ bool "NVIDIA Tegra Partition support" if PARTITION_ADVANCED
+ depends on ARCH_TEGRA || COMPILE_TEST
+ select MMC_BLOCK
+ help
+ Say Y here if you would like to be able to read the hard disk
+ partition table format used by NVIDIA Tegra machines.
@@ -21,3 +21,4 @@ obj-$(CONFIG_IBM_PARTITION) += ibm.o
obj-$(CONFIG_EFI_PARTITION) += efi.o
obj-$(CONFIG_KARMA_PARTITION) += karma.o
obj-$(CONFIG_SYSV68_PARTITION) += sysv68.o
+obj-$(CONFIG_TEGRA_PARTITION) += tegra.o
@@ -36,6 +36,7 @@
#include "karma.h"
#include "sysv68.h"
#include "cmdline.h"
+#include "tegra.h"
int warn_no_part = 1; /*This is ugly: should make genhd removable media aware*/
@@ -108,6 +109,9 @@ static int (*check_part[])(struct parsed_partitions *) = {
#endif
#ifdef CONFIG_SYSV68_PARTITION
sysv68_partition,
+#endif
+#ifdef CONFIG_TEGRA_PARTITION
+ tegra_partition,
#endif
NULL
};
new file mode 100644
@@ -0,0 +1,373 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * NVIDIA Tegra Partition Table
+ *
+ * Copyright (C) 2020 GRATE-DRIVER project
+ * Copyright (C) 2020 Dmitry Osipenko <digetx@gmail.com>
+ *
+ * Credits for the partition table format:
+ *
+ * Andrey Danin <danindrey@mail.ru> (Toshiba AC100 TegraPT format)
+ * Gilles Grandou <gilles@grandou.net> (Toshiba AC100 TegraPT format)
+ * Ryan Grachek <ryan@edited.us> (Google TV "Molly" TegraPT format)
+ * Stephen Warren <swarren@wwwdotorg.org> (Useful suggestions about EMMC)
+ */
+
+#define pr_fmt(fmt) "tegra-partition: " fmt
+
+#include <linux/blkdev.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/sizes.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+
+#include <soc/tegra/common.h>
+#include <soc/tegra/partition_table.h>
+
+#include "check.h"
+#include "tegra.h"
+
+#define TEGRA_PT_SECTOR_SZ (TEGRA_PT_LOGICAL_SECTOR_SIZE / SECTOR_SIZE)
+#define TEGRA_PT_SECTOR(s) (TEGRA_PT_SECTOR_SZ * (s))
+
+#define TEGRA_PT_ERR(ptp, fmt, ...) \
+ pr_err("%s: " fmt, \
+ (ptp)->state->bdev->bd_disk->disk_name, ##__VA_ARGS__)
+
+#define TEGRA_PT_PARSE_ERR(ptp, fmt, ...) \
+ TEGRA_PT_ERR(ptp, "sector %llu: invalid " fmt, \
+ (ptp)->sector, ##__VA_ARGS__)
+
+struct tegra_partition_table_parser {
+ struct tegra_partition_table *pt;
+ struct parsed_partitions *state;
+ sector_t sector;
+ int boot_offset;
+};
+
+union tegra_partition_table_u {
+ struct tegra_partition_table pt;
+ u8 pt_parts[TEGRA_PT_SECTOR_SZ][SECTOR_SIZE];
+};
+
+static sector_t tegra_pt_sector_address;
+static sector_t tegra_pt_sectors_num;
+
+/*
+ * Some partitions are very sensitive, changing data on them may brick device.
+ *
+ * For more details about partitions see:
+ *
+ * "https://docs.nvidia.com/jetson/l4t/Tegra Linux Driver Package Development Guide/part_config.html"
+ */
+static const char * const partitions_blacklist[] = {
+ "BCT", "EBT", "GP1", "GPT", "MBR", "PT",
+};
+
+static bool tegra_partition_name_match(struct tegra_partition *p,
+ const char *name)
+{
+ return !strncmp(p->partition_name, name, TEGRA_PT_NAME_SIZE);
+}
+
+static bool tegra_partition_skip(struct tegra_partition *p,
+ struct tegra_partition_table_parser *ptp,
+ sector_t sector)
+{
+ unsigned int i;
+
+ /* skip EMMC boot partitions */
+ if (sector < ptp->boot_offset)
+ return true;
+
+ for (i = 0; i < ARRAY_SIZE(partitions_blacklist); i++) {
+ if (tegra_partition_name_match(p, partitions_blacklist[i]))
+ return true;
+ }
+
+ return false;
+}
+
+static bool tegra_partition_valid(struct tegra_partition *p,
+ struct tegra_partition *prev,
+ struct tegra_partition_table_parser *ptp,
+ sector_t sector,
+ sector_t size)
+{
+ struct tegra_partition_info *prev_pi = &prev->part_info;
+ sector_t sect_end = TEGRA_PT_SECTOR(prev_pi->logical_sector_address +
+ prev_pi->logical_sectors_num);
+ char *type, name[2][TEGRA_PT_NAME_SIZE + 1];
+
+ snprintf(name[0], TEGRA_PT_NAME_SIZE, "%s", p->partition_name);
+ snprintf(name[1], TEGRA_PT_NAME_SIZE, "%s", prev->partition_name);
+
+ /* validate partition table BCT addresses */
+ if (tegra_partition_name_match(p, "PT") &&
+ sector != tegra_pt_sector_address &&
+ size != tegra_pt_sectors_num) {
+ TEGRA_PT_PARSE_ERR(ptp, "PT location: sector=%llu size=%llu\n",
+ sector, size);
+ return false;
+ }
+
+ /* validate size overflow */
+ if (sector + size < sector) {
+ TEGRA_PT_PARSE_ERR(ptp, "size: [%s] integer overflow sector=%llu size=%llu\n",
+ name[0], sector, size);
+ return false;
+ }
+
+ /* validate allocation_policy=sequential */
+ if (p != prev && sect_end > sector) {
+ TEGRA_PT_PARSE_ERR(ptp, "allocation_policy: [%s] end=%llu [%s] sector=%llu size=%llu\n",
+ name[1], sect_end, name[0], sector, size);
+ return false;
+ }
+
+ sect_end = get_capacity(ptp->state->bdev->bd_disk);
+
+ /* EMMC boot partitions are below ptp->boot_offset */
+ if (sector < ptp->boot_offset) {
+ sect_end += ptp->boot_offset;
+ type = "boot";
+ } else {
+ sector -= ptp->boot_offset;
+ type = "main";
+ }
+
+ /* validate size */
+ if (!size || sector + size > sect_end) {
+ TEGRA_PT_PARSE_ERR(ptp, "size: [%s] %s partition boot_offt=%d end=%llu sector=%llu size=%llu\n",
+ name[0], type, ptp->boot_offset, sect_end,
+ sector, size);
+ return false;
+ }
+
+ return true;
+}
+
+static bool tegra_partitions_parse(struct tegra_partition_table_parser *ptp,
+ bool check_only)
+{
+ struct parsed_partitions *state = ptp->state;
+ struct tegra_partition_table *pt = ptp->pt;
+ sector_t sector, size;
+ int i, slot = 1;
+
+ for (i = 0; i < pt->secure.num_partitions; i++) {
+ struct tegra_partition *p = &pt->partitions[i];
+ struct tegra_partition *prev = &pt->partitions[max(i - 1, 0)];
+ struct tegra_partition_info *pi = &p->part_info;
+
+ if (slot == state->limit && !check_only)
+ break;
+
+ sector = TEGRA_PT_SECTOR(pi->logical_sector_address);
+ size = TEGRA_PT_SECTOR(pi->logical_sectors_num);
+
+ if (!tegra_partition_valid(p, prev, ptp, sector, size))
+ return false;
+
+ if (check_only ||
+ tegra_partition_skip(p, ptp, sector))
+ continue;
+
+ put_partition(state, slot++, sector - ptp->boot_offset, size);
+ }
+
+ return true;
+}
+
+static bool
+tegra_partition_table_parsed(struct tegra_partition_table_parser *ptp)
+{
+ if (ptp->pt->secure.num_partitions == 0 ||
+ ptp->pt->secure.num_partitions > TEGRA_PT_MAX_PARTITIONS) {
+ TEGRA_PT_PARSE_ERR(ptp, "num_partitions=%u\n",
+ ptp->pt->secure.num_partitions);
+ return false;
+ }
+
+ return tegra_partitions_parse(ptp, true) &&
+ tegra_partitions_parse(ptp, false);
+}
+
+static int
+tegra_partition_table_insec_hdr_valid(struct tegra_partition_table_parser *ptp)
+{
+ if (ptp->pt->insecure.magic != TEGRA_PT_MAGIC ||
+ ptp->pt->insecure.version != TEGRA_PT_VERSION) {
+ TEGRA_PT_PARSE_ERR(ptp, "insecure header: magic=0x%llx ver=0x%x\n",
+ ptp->pt->insecure.magic,
+ ptp->pt->insecure.version);
+ return 0;
+ }
+
+ return 1;
+}
+
+static int
+tegra_partition_table_sec_hdr_valid(struct tegra_partition_table_parser *ptp)
+{
+ if (ptp->pt->secure.magic != TEGRA_PT_MAGIC ||
+ ptp->pt->secure.version != TEGRA_PT_VERSION) {
+ TEGRA_PT_PARSE_ERR(ptp, "secure header: magic=0x%llx ver=0x%x\n",
+ ptp->pt->secure.magic,
+ ptp->pt->secure.version);
+ return 0;
+ }
+
+ return 1;
+}
+
+static int
+tegra_partition_table_unencrypted(struct tegra_partition_table_parser *ptp)
+{
+ /* AES IV, all zeros if unencrypted */
+ if (ptp->pt->secure.random_data[0] || ptp->pt->secure.random_data[1] ||
+ ptp->pt->secure.random_data[2] || ptp->pt->secure.random_data[3]) {
+ pr_err_once("encrypted partition table unsupported\n");
+ return 0;
+ }
+
+ return 1;
+}
+
+static const struct of_device_id tegra_sdhci_match[] = {
+ { .compatible = "nvidia,tegra20-sdhci", },
+ { .compatible = "nvidia,tegra30-sdhci", },
+ {}
+};
+
+static int
+tegra_partition_table_emmc_boot_offset(struct tegra_partition_table_parser *ptp)
+{
+ struct mmc_card *card = mmc_bdev_to_card(ptp->state->bdev);
+
+ /* offset applies to the main built-in EMMC storage only */
+ if (!card || mmc_card_is_removable(card->host) ||
+ !mmc_card_is_blockaddr(card))
+ return 0;
+
+ /* skip everything unrelated to Tegra's EMMC */
+ if (!of_match_node(tegra_sdhci_match, card->host->parent->of_node))
+ return -1;
+
+ /*
+ * EMMC storage has two special boot partitions in addition to the
+ * main one. NVIDIA's bootloader linearizes EMMC boot0->boot1->main
+ * accesses, this means that the partition table addresses are shifted
+ * by the size of boot partitions. In accordance with the EMMC
+ * specification, the boot partition size is calculated as follows:
+ *
+ * boot partition size = 128K byte x BOOT_SIZE_MULT
+ *
+ * This function returns number of sectors occupied by the both boot
+ * partitions.
+ */
+ return card->ext_csd.raw_boot_mult * SZ_128K /
+ card->ext_csd.data_sector_size * MMC_NUM_BOOT_PARTITION;
+}
+
+static int tegra_read_partition_table(struct tegra_partition_table_parser *ptp)
+{
+ union tegra_partition_table_u *ptu = (typeof(ptu))ptp->pt;
+ unsigned int i;
+ Sector sect;
+ void *part;
+
+ for (i = 0; i < ARRAY_SIZE(ptu->pt_parts); i++) {
+ /*
+ * Partition table takes at maximum 4096 bytes, but
+ * read_part_sector() guarantees only that SECTOR_SIZE will
+ * be read at minimum.
+ */
+ part = read_part_sector(ptp->state, ptp->sector + i, §);
+ if (!part) {
+ TEGRA_PT_ERR(ptp, "failed to read sector %llu\n",
+ ptp->sector + i);
+ return 0;
+ }
+
+ memcpy(ptu->pt_parts[i], part, SECTOR_SIZE);
+ put_dev_sector(sect);
+ }
+
+ return 1;
+}
+
+void tegra_partition_table_setup(sector_t logical_sector_address,
+ sector_t logical_sectors_num)
+{
+ tegra_pt_sector_address = TEGRA_PT_SECTOR(logical_sector_address);
+ tegra_pt_sectors_num = TEGRA_PT_SECTOR(logical_sectors_num);
+
+ pr_info("initialized to sector = %llu sectors_num = %llu\n",
+ tegra_pt_sector_address, tegra_pt_sectors_num);
+}
+
+int tegra_partition(struct parsed_partitions *state)
+{
+ struct tegra_partition_table_parser ptp = { .state = state };
+ sector_t sector_end;
+ int ret = 0;
+
+ if (!soc_is_tegra())
+ return 0;
+
+ ptp.boot_offset = tegra_partition_table_emmc_boot_offset(&ptp);
+ if (ptp.boot_offset < 0)
+ return 0;
+
+ if (tegra_pt_sector_address < ptp.boot_offset) {
+ pr_info("scanning EMMC boot partitions unimplemented\n");
+ return 0;
+ }
+
+ ptp.pt = kmalloc(sizeof(*ptp.pt), GFP_KERNEL);
+ if (!ptp.pt)
+ return 0;
+
+ ptp.sector = tegra_pt_sector_address - ptp.boot_offset;
+ sector_end = ptp.sector + tegra_pt_sectors_num;
+
+ /*
+ * Partition table is duplicated till the sector_end.
+ * If first table is corrupted, we will try next.
+ */
+ while (ptp.sector < sector_end) {
+ ret = tegra_read_partition_table(&ptp);
+ if (!ret)
+ goto next_sector;
+
+ ret = tegra_partition_table_insec_hdr_valid(&ptp);
+ if (!ret)
+ goto next_sector;
+
+ ret = tegra_partition_table_unencrypted(&ptp);
+ if (!ret)
+ goto next_sector;
+
+ ret = tegra_partition_table_sec_hdr_valid(&ptp);
+ if (!ret)
+ goto next_sector;
+
+ ret = tegra_partition_table_parsed(&ptp);
+ if (ret)
+ break;
+next_sector:
+ ptp.sector += TEGRA_PT_SECTOR_SZ;
+ }
+
+ if (ret == 1)
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+
+ kfree(ptp.pt);
+
+ return ret;
+}
new file mode 100644
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __FS_PART_TEGRA_H__
+#define __FS_PART_TEGRA_H__
+
+#include <linux/compiler.h>
+#include <linux/types.h>
+
+#define TEGRA_PT_MAGIC 0xffffffff8f9e8d8bULL
+#define TEGRA_PT_VERSION 0x100
+#define TEGRA_PT_LOGICAL_SECTOR_SIZE 4096
+#define TEGRA_PT_AES_HASH_SIZE 4
+#define TEGRA_PT_NAME_SIZE 4
+
+#define TEGRA_PT_HEADER_SZ \
+ (sizeof(struct tegra_partition_header_insecure) + \
+ sizeof(struct tegra_partition_header_secure)) \
+
+#define TEGRA_PT_MAX_PARTITIONS \
+ ((TEGRA_PT_LOGICAL_SECTOR_SIZE - TEGRA_PT_HEADER_SZ) / \
+ sizeof(struct tegra_partition))
+
+struct tegra_partition_mount_info {
+ u32 device_id;
+ u32 device_instance;
+ u32 device_attr;
+ u8 mount_path[TEGRA_PT_NAME_SIZE];
+ u32 file_system_type;
+ u32 file_system_attr;
+} __packed;
+
+struct tegra_partition_info {
+ u32 partition_attr;
+ u32 __pad1;
+ u64 logical_sector_address;
+ u64 logical_sectors_num;
+ u64 __pad2[3];
+} __packed;
+
+struct tegra_partition {
+ u32 partition_id;
+ u8 partition_name[TEGRA_PT_NAME_SIZE];
+ struct tegra_partition_mount_info mount_info;
+ struct tegra_partition_info part_info;
+} __packed;
+
+struct tegra_partition_header_insecure {
+ u64 magic;
+ u32 version;
+ u32 length;
+ u32 signature[TEGRA_PT_AES_HASH_SIZE];
+} __packed;
+
+struct tegra_partition_header_secure {
+ u32 random_data[TEGRA_PT_AES_HASH_SIZE];
+ u64 magic;
+ u32 version;
+ u32 length;
+ u32 num_partitions;
+ u32 __pad;
+} __packed;
+
+struct tegra_partition_table {
+ struct tegra_partition_header_insecure insecure;
+ struct tegra_partition_header_secure secure;
+ struct tegra_partition partitions[TEGRA_PT_MAX_PARTITIONS];
+} __packed;
+
+int tegra_partition(struct parsed_partitions *state);
+
+#endif /* __FS_PART_TEGRA_H__ */
new file mode 100644
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __SOC_TEGRA_BCT_H__
+#define __SOC_TEGRA_BCT_H__
+
+#include <linux/compiler.h>
+#include <linux/types.h>
+
+#define TEGRA_IRAM_BCT_OFFSET 0x100
+
+#define TEGRA_BOOTDATA_VERSION_T20 NVBOOT_BOOTDATA_VERSION(0x2, 0x1)
+#define TEGRA_BOOTDATA_VERSION_T30 NVBOOT_BOOTDATA_VERSION(0x3, 0x1)
+
+#define NVBOOT_BOOTDATA_VERSION(a, b) ((((a) & 0xffff) << 16) | \
+ ((b) & 0xffff))
+#define NVBOOT_CMAC_AES_HASH_LENGTH 4
+
+struct tegra20_boot_config_table {
+ u32 crypto_hash[NVBOOT_CMAC_AES_HASH_LENGTH];
+ u32 random_aes_blk[NVBOOT_CMAC_AES_HASH_LENGTH];
+ u32 boot_data_version;
+ u32 unused_data1[712];
+ u32 unused_consumer_data1;
+ u16 partition_table_logical_sector_address;
+ u16 partition_table_num_logical_sectors;
+ u32 unused_consumer_data[292];
+ u32 unused_data[3];
+} __packed;
+
+struct tegra30_boot_config_table {
+ u32 crypto_hash[NVBOOT_CMAC_AES_HASH_LENGTH];
+ u32 random_aes_blk[NVBOOT_CMAC_AES_HASH_LENGTH];
+ u32 boot_data_version;
+ u32 unused_data1[1016];
+ u32 unused_consumer_data1;
+ u16 partition_table_logical_sector_address;
+ u16 partition_table_num_logical_sectors;
+ u32 unused_consumer_data[500];
+ u32 unused_data[3];
+} __packed;
+
+#endif /* __SOC_TEGRA_BCT_H__ */
@@ -6,6 +6,15 @@
#ifndef __SOC_TEGRA_COMMON_H__
#define __SOC_TEGRA_COMMON_H__
+#include <linux/types.h>
+
+#ifdef CONFIG_ARCH_TEGRA
bool soc_is_tegra(void);
+#else
+static inline bool soc_is_tegra(void)
+{
+ return false;
+}
+#endif
#endif /* __SOC_TEGRA_COMMON_H__ */
new file mode 100644
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __SOC_TEGRA_PARTITION_H__
+#define __SOC_TEGRA_PARTITION_H__
+
+#include <linux/types.h>
+
+#ifdef CONFIG_TEGRA_PARTITION
+void tegra_partition_table_setup(sector_t logical_sector_address,
+ sector_t logical_sectors_num);
+#else
+static inline void tegra_partition_table_setup(sector_t logical_sector_address,
+ sector_t logical_sectors_num)
+{
+}
+#endif
+
+#endif /* __SOC_TEGRA_PARTITION_H__ */
All NVIDIA Tegra devices use a special partition table format for the internal storage partitioning. Most of Tegra devices have GPT partition in addition to TegraPT, but some older Android consumer-grade devices do not or GPT is placed in a wrong sector, and thus, the TegraPT is needed in order to support these devices properly in the upstream kernel. This patch adds support for NVIDIA Tegra Partition Table format that is used at least by all NVIDIA Tegra20 and Tegra30 devices. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> --- arch/arm/mach-tegra/tegra.c | 35 +++ block/partitions/Kconfig | 8 + block/partitions/Makefile | 1 + block/partitions/check.c | 4 + block/partitions/tegra.c | 373 ++++++++++++++++++++++++++++ block/partitions/tegra.h | 71 ++++++ include/soc/tegra/bct.h | 42 ++++ include/soc/tegra/common.h | 9 + include/soc/tegra/partition_table.h | 18 ++ 9 files changed, 561 insertions(+) create mode 100644 block/partitions/tegra.c create mode 100644 block/partitions/tegra.h create mode 100644 include/soc/tegra/bct.h create mode 100644 include/soc/tegra/partition_table.h