From df6e36edac23f096fae45d0a8fe2efcf0e77aebe Mon Sep 17 00:00:00 2001 From: Takahiro Kuwano Date: Tue, 20 Feb 2024 17:34:07 +0900 Subject: mtd: spi-nor: core: get rid of SNOR_LAST_REGION flag Introduce n_regions in spi_nor_erase_map structure and remove SNOR_LAST_REGION flag. Loop logics that depend on the flag are also reworked to use n_regions as loop condition. Signed-off-by: Takahiro Kuwano Suggested-by: Tudor Ambarus Suggested-by: Michael Walle Reviewed-by: Michael Walle Link: https://lore.kernel.org/r/eded84294bd81e966d6f423e578fc2cfb9a4a5b6.1708404584.git.Takahiro.Kuwano@infineon.com [ta: update spi_nor_init_erase_cmd_list() and break the for loop sooner.] Signed-off-by: Tudor Ambarus --- drivers/mtd/spi-nor/core.c | 102 ++++++++++-------------------------------- drivers/mtd/spi-nor/core.h | 10 ++--- drivers/mtd/spi-nor/debugfs.c | 16 +++---- drivers/mtd/spi-nor/sfdp.c | 18 +++----- 4 files changed, 41 insertions(+), 105 deletions(-) diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index d526e555e7b3..8dcfb8649f01 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -1573,52 +1573,6 @@ spi_nor_find_best_erase_type(const struct spi_nor_erase_map *map, return NULL; } -static u64 spi_nor_region_is_last(const struct spi_nor_erase_region *region) -{ - return region->flags & SNOR_LAST_REGION; -} - -/** - * spi_nor_region_next() - get the next spi nor region - * @region: pointer to a structure that describes a SPI NOR erase region - * - * Return: the next spi nor region or NULL if last region. - */ -struct spi_nor_erase_region * -spi_nor_region_next(struct spi_nor_erase_region *region) -{ - if (spi_nor_region_is_last(region)) - return NULL; - region++; - return region; -} - -/** - * spi_nor_find_erase_region() - find the region of the serial flash memory in - * which the offset fits - * @map: the erase map of the SPI NOR - * @addr: offset in the serial flash memory - * - * Return: a pointer to the spi_nor_erase_region struct, ERR_PTR(-errno) - * otherwise. - */ -static struct spi_nor_erase_region * -spi_nor_find_erase_region(const struct spi_nor_erase_map *map, u64 addr) -{ - struct spi_nor_erase_region *region = map->regions; - u64 region_end = region->offset + region->size; - - while (addr < region->offset || addr >= region_end) { - region = spi_nor_region_next(region); - if (!region) - return ERR_PTR(-EINVAL); - - region_end = region->offset + region->size; - } - - return region; -} - /** * spi_nor_init_erase_cmd() - initialize an erase command * @region: pointer to a structure that describes a SPI NOR erase region @@ -1685,44 +1639,36 @@ static int spi_nor_init_erase_cmd_list(struct spi_nor *nor, struct spi_nor_erase_region *region; struct spi_nor_erase_command *cmd = NULL; u64 region_end; + unsigned int i; int ret = -EINVAL; - region = spi_nor_find_erase_region(map, addr); - if (IS_ERR(region)) - return PTR_ERR(region); - - region_end = region->offset + region->size; + for (i = 0; i < map->n_regions && len; i++) { + region = &map->regions[i]; + region_end = region->offset + region->size; - while (len) { - erase = spi_nor_find_best_erase_type(map, region, addr, len); - if (!erase) - goto destroy_erase_cmd_list; - - if (prev_erase != erase || - erase->size != cmd->size || - region->flags & SNOR_OVERLAID_REGION) { - cmd = spi_nor_init_erase_cmd(region, erase); - if (IS_ERR(cmd)) { - ret = PTR_ERR(cmd); + while (len && addr >= region->offset && addr < region_end) { + erase = spi_nor_find_best_erase_type(map, region, addr, + len); + if (!erase) goto destroy_erase_cmd_list; - } - - list_add_tail(&cmd->list, erase_list); - } else { - cmd->count++; - } - addr += cmd->size; - len -= cmd->size; + if (prev_erase != erase || erase->size != cmd->size || + region->flags & SNOR_OVERLAID_REGION) { + cmd = spi_nor_init_erase_cmd(region, erase); + if (IS_ERR(cmd)) { + ret = PTR_ERR(cmd); + goto destroy_erase_cmd_list; + } + + list_add_tail(&cmd->list, erase_list); + } else { + cmd->count++; + } - if (len && addr >= region_end) { - region = spi_nor_region_next(region); - if (!region) - goto destroy_erase_cmd_list; - region_end = region->offset + region->size; + len -= cmd->size; + addr += cmd->size; + prev_erase = erase; } - - prev_erase = erase; } return 0; @@ -2463,8 +2409,8 @@ void spi_nor_init_uniform_erase_map(struct spi_nor_erase_map *map, map->uniform_region.offset = 0; map->uniform_region.size = flash_size; map->uniform_region.erase_mask = erase_mask; - map->uniform_region.flags = SNOR_LAST_REGION; map->regions = &map->uniform_region; + map->n_regions = 1; } int spi_nor_post_bfpt_fixups(struct spi_nor *nor, diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h index f68ae2fc4a1f..38be40a4647b 100644 --- a/drivers/mtd/spi-nor/core.h +++ b/drivers/mtd/spi-nor/core.h @@ -245,8 +245,7 @@ struct spi_nor_erase_command { * inside this region. The erase types are sorted in * ascending order with the smallest Erase Type size being * at BIT(0). - * @flags: flags to determine if this region is overlaid, if this - * region is the last in the SPI NOR flash memory + * @flags: flags to determine if this region is overlaid. */ struct spi_nor_erase_region { u64 offset; @@ -257,8 +256,7 @@ struct spi_nor_erase_region { #define SNOR_ERASE_TYPE_MAX 4 -#define SNOR_LAST_REGION BIT(0) -#define SNOR_OVERLAID_REGION BIT(1) +#define SNOR_OVERLAID_REGION BIT(0) /** * struct spi_nor_erase_map - Structure to describe the SPI NOR erase map @@ -271,11 +269,13 @@ struct spi_nor_erase_region { * The erase types are sorted in ascending order, with the * smallest Erase Type size being the first member in the * erase_type array. + * @n_regions: number of erase regions. */ struct spi_nor_erase_map { struct spi_nor_erase_region *regions; struct spi_nor_erase_region uniform_region; struct spi_nor_erase_type erase_type[SNOR_ERASE_TYPE_MAX]; + unsigned int n_regions; }; /** @@ -667,8 +667,6 @@ void spi_nor_set_pp_settings(struct spi_nor_pp_command *pp, u8 opcode, void spi_nor_set_erase_type(struct spi_nor_erase_type *erase, u32 size, u8 opcode); void spi_nor_mask_erase_type(struct spi_nor_erase_type *erase); -struct spi_nor_erase_region * -spi_nor_region_next(struct spi_nor_erase_region *region); void spi_nor_init_uniform_erase_map(struct spi_nor_erase_map *map, u8 erase_mask, u64 flash_size); diff --git a/drivers/mtd/spi-nor/debugfs.c b/drivers/mtd/spi-nor/debugfs.c index d20bbb531a88..db050a1f1f37 100644 --- a/drivers/mtd/spi-nor/debugfs.c +++ b/drivers/mtd/spi-nor/debugfs.c @@ -78,10 +78,10 @@ static int spi_nor_params_show(struct seq_file *s, void *data) struct spi_nor *nor = s->private; struct spi_nor_flash_parameter *params = nor->params; struct spi_nor_erase_map *erase_map = ¶ms->erase_map; - struct spi_nor_erase_region *region; + struct spi_nor_erase_region *region = erase_map->regions; const struct flash_info *info = nor->info; char buf[16], *str; - int i; + unsigned int i; seq_printf(s, "name\t\t%s\n", info->name); seq_printf(s, "id\t\t%*ph\n", SPI_NOR_MAX_ID_LEN, nor->id); @@ -144,13 +144,11 @@ static int spi_nor_params_show(struct seq_file *s, void *data) seq_puts(s, "\nsector map\n"); seq_puts(s, " region (in hex) | erase mask | flags\n"); seq_puts(s, " ------------------+------------+----------\n"); - for (region = erase_map->regions; - region; - region = spi_nor_region_next(region)) { - u64 start = region->offset; - u64 end = start + region->size - 1; - u8 erase_mask = region->erase_mask; - u8 flags = region->flags; + for (i = 0; i < erase_map->n_regions; i++) { + u64 start = region[i].offset; + u64 end = start + region[i].size - 1; + u8 erase_mask = region[i].erase_mask; + u8 flags = region[i].flags; seq_printf(s, " %08llx-%08llx | [%c%c%c%c] | %s\n", start, end, diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c index 3cf1db6e4026..8d83580207d5 100644 --- a/drivers/mtd/spi-nor/sfdp.c +++ b/drivers/mtd/spi-nor/sfdp.c @@ -390,15 +390,14 @@ static void spi_nor_regions_sort_erase_types(struct spi_nor_erase_map *map) { struct spi_nor_erase_region *region = map->regions; u8 sorted_erase_mask; + unsigned int i; - while (region) { - sorted_erase_mask = spi_nor_sort_erase_mask(map, - region->erase_mask); + for (i = 0; i < map->n_regions; i++) { + sorted_erase_mask = + spi_nor_sort_erase_mask(map, region[i].erase_mask); /* Overwrite erase mask. */ - region->erase_mask = sorted_erase_mask; - - region = spi_nor_region_next(region); + region[i].erase_mask = sorted_erase_mask; } } @@ -801,11 +800,6 @@ out: return ret; } -static void spi_nor_region_mark_end(struct spi_nor_erase_region *region) -{ - region->flags |= SNOR_LAST_REGION; -} - static void spi_nor_region_mark_overlay(struct spi_nor_erase_region *region) { region->flags |= SNOR_OVERLAID_REGION; @@ -863,6 +857,7 @@ static int spi_nor_init_non_uniform_erase_map(struct spi_nor *nor, if (!region) return -ENOMEM; map->regions = region; + map->n_regions = region_count; uniform_erase_type = 0xff; regions_erase_type = 0; @@ -891,7 +886,6 @@ static int spi_nor_init_non_uniform_erase_map(struct spi_nor *nor, offset = region[i].offset + region[i].size; } - spi_nor_region_mark_end(®ion[i - 1]); save_uniform_erase_type = map->uniform_region.erase_mask; map->uniform_region.erase_mask = -- cgit v1.2.3