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author | Rafał Miłecki <rafal@milecki.pl> | 2017-01-10 15:12:04 +0100 |
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committer | Rafał Miłecki <rafal@milecki.pl> | 2017-01-10 15:37:22 +0100 |
commit | 1a5cb4ac1bd0f1a7047e2a6825950654c44ca01f (patch) | |
tree | eaab394a052a5a943f6a33b52a5c4d798f8779da /target/linux/generic | |
parent | ef9208c51eff93c58de02691a87749fb184a2889 (diff) | |
download | mtk-20170518-1a5cb4ac1bd0f1a7047e2a6825950654c44ca01f.zip mtk-20170518-1a5cb4ac1bd0f1a7047e2a6825950654c44ca01f.tar.gz mtk-20170518-1a5cb4ac1bd0f1a7047e2a6825950654c44ca01f.tar.bz2 |
kernel: add pending bcm47xxpart support for failsafe TRX partition
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Diffstat (limited to 'target/linux/generic')
4 files changed, 314 insertions, 50 deletions
diff --git a/target/linux/generic/patches-4.4/141-0001-mtd-bcm47xxpart-move-TRX-parsing-code-to-separated-f.patch b/target/linux/generic/patches-4.4/141-0001-mtd-bcm47xxpart-move-TRX-parsing-code-to-separated-f.patch new file mode 100644 index 0000000..09cbec6 --- /dev/null +++ b/target/linux/generic/patches-4.4/141-0001-mtd-bcm47xxpart-move-TRX-parsing-code-to-separated-f.patch @@ -0,0 +1,180 @@ +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Subject: [PATCH 1/2] mtd: bcm47xxpart: move TRX parsing code to separated + function +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This change simplifies main parsing loop logic a bit. In future it may +be useful for moving TRX support to separated module / parser (if we +implement support for them at some point). +Finally parsing TRX at the end puts us in a better position as we have +better flash layout knowledge. It may be useful e.g. if it appears there +is more than 1 TRX partition. + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +--- + drivers/mtd/bcm47xxpart.c | 124 ++++++++++++++++++++++++++++------------------ + 1 file changed, 77 insertions(+), 47 deletions(-) + +--- a/drivers/mtd/bcm47xxpart.c ++++ b/drivers/mtd/bcm47xxpart.c +@@ -83,6 +83,70 @@ out_default: + return "rootfs"; + } + ++static int bcm47xxpart_parse_trx(struct mtd_info *master, ++ struct mtd_partition *trx, ++ struct mtd_partition *parts, ++ size_t parts_len) ++{ ++ struct mtd_partition *part; ++ struct trx_header header; ++ size_t bytes_read; ++ int curr_part = 0; ++ int i, err; ++ ++ if (parts_len < 3) { ++ pr_warn("No enough space to add TRX partitions!\n"); ++ return -ENOMEM; ++ } ++ ++ err = mtd_read(master, trx->offset, sizeof(header), &bytes_read, ++ (uint8_t *)&header); ++ if (err && !mtd_is_bitflip(err)) { ++ pr_err("mtd_read error while reading TRX header: %d\n", err); ++ return err; ++ } ++ ++ i = 0; ++ ++ /* We have LZMA loader if offset[2] points to sth */ ++ if (header.offset[2]) { ++ part = &parts[curr_part++]; ++ part->name = "loader"; ++ part->offset = trx->offset + header.offset[i]; ++ i++; ++ } ++ ++ if (header.offset[i]) { ++ part = &parts[curr_part++]; ++ part->name = "linux"; ++ part->offset = trx->offset + header.offset[i]; ++ i++; ++ } ++ ++ if (header.offset[i]) { ++ size_t offset = trx->offset + header.offset[i]; ++ ++ part = &parts[curr_part++]; ++ part->name = bcm47xxpart_trx_data_part_name(master, offset); ++ part->offset = offset; ++ i++; ++ } ++ ++ /* ++ * Assume that every partition ends at the beginning of the one it is ++ * followed by. ++ */ ++ for (i = 0; i < curr_part; i++) { ++ u64 next_part_offset = (i < curr_part - 1) ? ++ parts[i + 1].offset : ++ trx->offset + trx->size; ++ ++ parts[i].size = next_part_offset - parts[i].offset; ++ } ++ ++ return curr_part; ++} ++ + static int bcm47xxpart_parse(struct mtd_info *master, + struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +@@ -93,9 +157,7 @@ static int bcm47xxpart_parse(struct mtd_ + size_t bytes_read; + uint32_t offset; + uint32_t blocksize = master->erasesize; +- struct trx_header *trx; + int trx_part = -1; +- int last_trx_part = -1; + int possible_nvram_sizes[] = { 0x8000, 0xF000, 0x10000, }; + int err; + +@@ -182,54 +244,14 @@ static int bcm47xxpart_parse(struct mtd_ + + /* TRX */ + if (buf[0x000 / 4] == TRX_MAGIC) { +- if (BCM47XXPART_MAX_PARTS - curr_part < 4) { +- pr_warn("Not enough partitions left to register trx, scanning stopped!\n"); +- break; +- } +- +- trx = (struct trx_header *)buf; ++ struct trx_header *trx; + + trx_part = curr_part; + bcm47xxpart_add_part(&parts[curr_part++], "firmware", + offset, 0); + +- i = 0; +- /* We have LZMA loader if offset[2] points to sth */ +- if (trx->offset[2]) { +- bcm47xxpart_add_part(&parts[curr_part++], +- "loader", +- offset + trx->offset[i], +- 0); +- i++; +- } +- +- if (trx->offset[i]) { +- bcm47xxpart_add_part(&parts[curr_part++], +- "linux", +- offset + trx->offset[i], +- 0); +- i++; +- } +- +- /* +- * Pure rootfs size is known and can be calculated as: +- * trx->length - trx->offset[i]. We don't fill it as +- * we want to have jffs2 (overlay) in the same mtd. +- */ +- if (trx->offset[i]) { +- const char *name; +- +- name = bcm47xxpart_trx_data_part_name(master, offset + trx->offset[i]); +- bcm47xxpart_add_part(&parts[curr_part++], +- name, +- offset + trx->offset[i], +- 0); +- i++; +- } +- +- last_trx_part = curr_part - 1; +- + /* Jump to the end of TRX */ ++ trx = (struct trx_header *)buf; + offset = roundup(offset + trx->length, blocksize); + /* Next loop iteration will increase the offset */ + offset -= blocksize; +@@ -307,9 +329,17 @@ static int bcm47xxpart_parse(struct mtd_ + parts[i + 1].offset : master->size; + + parts[i].size = next_part_offset - parts[i].offset; +- if (i == last_trx_part && trx_part >= 0) +- parts[trx_part].size = next_part_offset - +- parts[trx_part].offset; ++ } ++ ++ /* If there was TRX parse it now */ ++ if (trx_part >= 0) { ++ int num_parts; ++ ++ num_parts = bcm47xxpart_parse_trx(master, &parts[trx_part], ++ parts + curr_part, ++ BCM47XXPART_MAX_PARTS - curr_part); ++ if (num_parts > 0) ++ curr_part += num_parts; + } + + *pparts = parts; diff --git a/target/linux/generic/patches-4.4/141-0002-mtd-bcm47xxpart-support-layouts-with-multiple-TRX-pa.patch b/target/linux/generic/patches-4.4/141-0002-mtd-bcm47xxpart-support-layouts-with-multiple-TRX-pa.patch new file mode 100644 index 0000000..1065322 --- /dev/null +++ b/target/linux/generic/patches-4.4/141-0002-mtd-bcm47xxpart-support-layouts-with-multiple-TRX-pa.patch @@ -0,0 +1,108 @@ +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Subject: [PATCH 2/2] mtd: bcm47xxpart: support layouts with multiple TRX + partitions +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Some devices may have an extra TRX partition used as failsafe one. If +we detect such partition we should set a proper name for it and don't +parse it. + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +--- + drivers/mtd/bcm47xxpart.c | 56 ++++++++++++++++++++++++++++++++++++++--------- + 1 file changed, 46 insertions(+), 10 deletions(-) + +--- a/drivers/mtd/bcm47xxpart.c ++++ b/drivers/mtd/bcm47xxpart.c +@@ -9,6 +9,7 @@ + * + */ + ++#include <linux/bcm47xx_nvram.h> + #include <linux/module.h> + #include <linux/kernel.h> + #include <linux/slab.h> +@@ -147,6 +148,30 @@ static int bcm47xxpart_parse_trx(struct + return curr_part; + } + ++/** ++ * bcm47xxpart_bootpartition - gets index of TRX partition used by bootloader ++ * ++ * Some devices may have more than one TRX partition. In such case one of them ++ * is the main one and another a failsafe one. Bootloader may fallback to the ++ * failsafe firmware if it detects corruption of the main image. ++ * ++ * This function provides info about currently used TRX partition. It's the one ++ * containing kernel started by the bootloader. ++ */ ++static int bcm47xxpart_bootpartition(void) ++{ ++ char buf[4]; ++ int bootpartition; ++ ++ /* Check CFE environment variable */ ++ if (bcm47xx_nvram_getenv("bootpartition", buf, sizeof(buf)) > 0) { ++ if (!kstrtoint(buf, 0, &bootpartition)) ++ return bootpartition; ++ } ++ ++ return 0; ++} ++ + static int bcm47xxpart_parse(struct mtd_info *master, + struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +@@ -157,7 +182,8 @@ static int bcm47xxpart_parse(struct mtd_ + size_t bytes_read; + uint32_t offset; + uint32_t blocksize = master->erasesize; +- int trx_part = -1; ++ int trx_parts[2]; /* Array with indexes of TRX partitions */ ++ int trx_num = 0; /* Number of found TRX partitions */ + int possible_nvram_sizes[] = { 0x8000, 0xF000, 0x10000, }; + int err; + +@@ -246,7 +272,11 @@ static int bcm47xxpart_parse(struct mtd_ + if (buf[0x000 / 4] == TRX_MAGIC) { + struct trx_header *trx; + +- trx_part = curr_part; ++ if (trx_num >= ARRAY_SIZE(trx_parts)) ++ pr_warn("No enough space to store another TRX found at 0x%X\n", ++ offset); ++ else ++ trx_parts[trx_num++] = curr_part; + bcm47xxpart_add_part(&parts[curr_part++], "firmware", + offset, 0); + +@@ -332,14 +362,20 @@ static int bcm47xxpart_parse(struct mtd_ + } + + /* If there was TRX parse it now */ +- if (trx_part >= 0) { +- int num_parts; ++ for (i = 0; i < trx_num; i++) { ++ struct mtd_partition *trx = &parts[trx_parts[i]]; + +- num_parts = bcm47xxpart_parse_trx(master, &parts[trx_part], +- parts + curr_part, +- BCM47XXPART_MAX_PARTS - curr_part); +- if (num_parts > 0) +- curr_part += num_parts; ++ if (i == bcm47xxpart_bootpartition()) { ++ int num_parts; ++ ++ num_parts = bcm47xxpart_parse_trx(master, trx, ++ parts + curr_part, ++ BCM47XXPART_MAX_PARTS - curr_part); ++ if (num_parts > 0) ++ curr_part += num_parts; ++ } else { ++ trx->name = "failsafe"; ++ } + } + + *pparts = parts; diff --git a/target/linux/generic/patches-4.4/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch b/target/linux/generic/patches-4.4/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch index 5ad82f1..b778451 100644 --- a/target/linux/generic/patches-4.4/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch +++ b/target/linux/generic/patches-4.4/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch @@ -13,7 +13,7 @@ Signed-off-by: Rafał Miłecki <zajec5@gmail.com> --- a/drivers/mtd/bcm47xxpart.c +++ b/drivers/mtd/bcm47xxpart.c -@@ -61,6 +61,34 @@ static void bcm47xxpart_add_part(struct +@@ -62,6 +62,34 @@ static void bcm47xxpart_add_part(struct part->mask_flags = mask_flags; } @@ -48,53 +48,29 @@ Signed-off-by: Rafał Miłecki <zajec5@gmail.com> static const char *bcm47xxpart_trx_data_part_name(struct mtd_info *master, size_t offset) { -@@ -182,6 +210,8 @@ static int bcm47xxpart_parse(struct mtd_ +@@ -113,19 +141,22 @@ static int bcm47xxpart_parse_trx(struct + if (header.offset[2]) { + part = &parts[curr_part++]; + part->name = "loader"; +- part->offset = trx->offset + header.offset[i]; ++ part->offset = bcm47xxpart_real_offset(master, trx->offset, ++ header.offset[i]); + i++; + } - /* TRX */ - if (buf[0x000 / 4] == TRX_MAGIC) { -+ uint32_t tmp; -+ - if (BCM47XXPART_MAX_PARTS - curr_part < 4) { - pr_warn("Not enough partitions left to register trx, scanning stopped!\n"); - break; -@@ -196,18 +226,18 @@ static int bcm47xxpart_parse(struct mtd_ - i = 0; - /* We have LZMA loader if offset[2] points to sth */ - if (trx->offset[2]) { -+ tmp = bcm47xxpart_real_offset(master, offset, -+ trx->offset[i]); - bcm47xxpart_add_part(&parts[curr_part++], -- "loader", -- offset + trx->offset[i], -- 0); -+ "loader", tmp, 0); - i++; - } - - if (trx->offset[i]) { -+ tmp = bcm47xxpart_real_offset(master, offset, -+ trx->offset[i]); - bcm47xxpart_add_part(&parts[curr_part++], -- "linux", -- offset + trx->offset[i], -- 0); -+ "linux", tmp, 0); - i++; - } - -@@ -219,11 +249,11 @@ static int bcm47xxpart_parse(struct mtd_ - if (trx->offset[i]) { - const char *name; + if (header.offset[i]) { + part = &parts[curr_part++]; + part->name = "linux"; +- part->offset = trx->offset + header.offset[i]; ++ part->offset = bcm47xxpart_real_offset(master, trx->offset, ++ header.offset[i]); + i++; + } -- name = bcm47xxpart_trx_data_part_name(master, offset + trx->offset[i]); -+ tmp = bcm47xxpart_real_offset(master, offset, -+ trx->offset[i]); -+ name = bcm47xxpart_trx_data_part_name(master, tmp); - bcm47xxpart_add_part(&parts[curr_part++], -- name, -- offset + trx->offset[i], -- 0); -+ name, tmp, 0); - i++; - } + if (header.offset[i]) { +- size_t offset = trx->offset + header.offset[i]; ++ size_t offset = bcm47xxpart_real_offset(master, trx->offset, ++ header.offset[i]); + part = &parts[curr_part++]; + part->name = bcm47xxpart_trx_data_part_name(master, offset); diff --git a/target/linux/generic/patches-4.4/432-mtd-bcm47xxpart-detect-T_Meter-partition.patch b/target/linux/generic/patches-4.4/432-mtd-bcm47xxpart-detect-T_Meter-partition.patch index 9e5ca91..b39ba3f 100644 --- a/target/linux/generic/patches-4.4/432-mtd-bcm47xxpart-detect-T_Meter-partition.patch +++ b/target/linux/generic/patches-4.4/432-mtd-bcm47xxpart-detect-T_Meter-partition.patch @@ -16,7 +16,7 @@ Signed-off-by: Rafał Miłecki <zajec5@gmail.com> --- a/drivers/mtd/bcm47xxpart.c +++ b/drivers/mtd/bcm47xxpart.c -@@ -38,6 +38,7 @@ +@@ -39,6 +39,7 @@ #define NVRAM_HEADER 0x48534C46 /* FLSH */ #define POT_MAGIC1 0x54544f50 /* POTT */ #define POT_MAGIC2 0x504f /* OP */ @@ -24,7 +24,7 @@ Signed-off-by: Rafał Miłecki <zajec5@gmail.com> #define ML_MAGIC1 0x39685a42 #define ML_MAGIC2 0x26594131 #define TRX_MAGIC 0x30524448 -@@ -207,6 +208,15 @@ static int bcm47xxpart_parse(struct mtd_ +@@ -298,6 +299,15 @@ static int bcm47xxpart_parse(struct mtd_ MTD_WRITEABLE); continue; } |