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Message-ID: <530942be-4175-43d5-a111-c433be7eff72@linaro.org>
Date: Wed, 6 Sep 2023 15:55:06 +0100
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: Michael Walle <mwalle@...nel.org>,
Pratyush Yadav <pratyush@...nel.org>,
Miquel Raynal <miquel.raynal@...tlin.com>,
Richard Weinberger <richard@....at>,
Vignesh Raghavendra <vigneshr@...com>
Cc: linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org
Subject: Re: [PATCH v2 11/41] mtd: spi-nor: drop .parse_sfdp
On 8/22/23 08:09, Michael Walle wrote:
> Drop the size parameter to indicate we need to do SFDP, we can do that
> because it is guaranteed that the size will be set by SFDP and because
> PARSE_SFDP forced the SFDP parsing it must be overwritten.
>
> Signed-off-by: Michael Walle <mwalle@...nel.org>
> ---
> drivers/mtd/spi-nor/core.c | 3 +--
> drivers/mtd/spi-nor/core.h | 23 ++++++++++++++++-------
> drivers/mtd/spi-nor/eon.c | 3 +--
> drivers/mtd/spi-nor/gigadevice.c | 3 +--
> drivers/mtd/spi-nor/issi.c | 4 +---
> drivers/mtd/spi-nor/macronix.c | 1 -
> drivers/mtd/spi-nor/spansion.c | 12 ------------
> drivers/mtd/spi-nor/sst.c | 1 -
> drivers/mtd/spi-nor/winbond.c | 7 ++-----
> 9 files changed, 22 insertions(+), 35 deletions(-)
>
> diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
> index 368851ff9f40..4ba1778eda4b 100644
> --- a/drivers/mtd/spi-nor/core.c
> +++ b/drivers/mtd/spi-nor/core.c
> @@ -2017,7 +2017,6 @@ static const struct spi_nor_manufacturer *manufacturers[] = {
>
> static const struct flash_info spi_nor_generic_flash = {
> .name = "spi-nor-generic",
> - .parse_sfdp = true,
> };
>
> static const struct flash_info *spi_nor_match_id(struct spi_nor *nor,
> @@ -3069,7 +3068,7 @@ static int spi_nor_init_params(struct spi_nor *nor)
>
> spi_nor_init_default_params(nor);
>
> - if (nor->info->parse_sfdp) {
> + if (spi_nor_needs_sfdp(nor)) {
> ret = spi_nor_parse_sfdp(nor);
> if (ret) {
> dev_err(nor->dev, "BFPT parsing failed. Please consider using SPI_NOR_SKIP_SFDP when declaring the flash\n");
> diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h
> index fba3ea8536a5..9e6ad02b03b0 100644
> --- a/drivers/mtd/spi-nor/core.h
> +++ b/drivers/mtd/spi-nor/core.h
> @@ -460,9 +460,6 @@ struct spi_nor_fixups {
> * @page_size: (optional) the flash's page size. Defaults to 256.
> * @addr_nbytes: number of address bytes to send.
> *
> - * @parse_sfdp: true when flash supports SFDP tables. The false value has no
> - * meaning. If one wants to skip the SFDP tables, one should
> - * instead use the SPI_NOR_SKIP_SFDP sfdp_flag.
> * @flags: flags that indicate support that is not defined by the
> * JESD216 standard in its SFDP tables. Flag meanings:
> * SPI_NOR_HAS_LOCK: flash supports lock/unlock via SR
> @@ -521,7 +518,6 @@ struct flash_info {
> u8 n_banks;
> u8 addr_nbytes;
>
> - bool parse_sfdp;
> u16 flags;
> #define SPI_NOR_HAS_LOCK BIT(0)
> #define SPI_NOR_HAS_TB BIT(1)
> @@ -598,9 +594,6 @@ struct flash_info {
> .n_regions = (_n_regions), \
> },
>
> -#define PARSE_SFDP \
> - .parse_sfdp = true, \
> -
> #define FLAGS(_flags) \
> .flags = (_flags), \
>
> @@ -740,6 +733,22 @@ static inline struct spi_nor *mtd_to_spi_nor(struct mtd_info *mtd)
> return container_of(mtd, struct spi_nor, mtd);
> }
>
> +/**
> + * spi_nor_needs_sfdp() - returns true if SFDP parsing is used for this flash.
> + *
> + * Return: true if SFDP parsing is needed
> + */
> +static inline bool spi_nor_needs_sfdp(const struct spi_nor *nor)
> +{
> + /*
> + * The flash size is one property parsed by the SFDP. We use it as an
> + * indicator whether we need SFDP parsing for a particular flash. I.e.
> + * non-legacy flash entries in flash_info will have a size of zero iff
> + * SFDP should be used.
> + */
> + return nor->info->size;
the condition looks broken. the method returns bool, but here you return
size_t probably. And when size is zero one shall parse sfdp, not the
other way around.
maybe return (nor->info->size == 0)?
> +}
> +
> #ifdef CONFIG_DEBUG_FS
> void spi_nor_debugfs_register(struct spi_nor *nor);
> void spi_nor_debugfs_shutdown(void);
> diff --git a/drivers/mtd/spi-nor/eon.c b/drivers/mtd/spi-nor/eon.c
> index 50a11053711f..434aaf155856 100644
> --- a/drivers/mtd/spi-nor/eon.c
> +++ b/drivers/mtd/spi-nor/eon.c
> @@ -25,8 +25,7 @@ static const struct flash_info eon_nor_parts[] = {
> { "en25qh64", INFO(0x1c7017, 0, 64 * 1024, 128)
> NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ) },
> { "en25qh128", INFO(0x1c7018, 0, 64 * 1024, 256) },
> - { "en25qh256", INFO(0x1c7019, 0, 64 * 1024, 512)
> - PARSE_SFDP },
> + { "en25qh256", INFO(0x1c7019, 0, 64 * 1024, 0) },
> { "en25s64", INFO(0x1c3817, 0, 64 * 1024, 128)
> NO_SFDP_FLAGS(SECT_4K) },
> };
> diff --git a/drivers/mtd/spi-nor/gigadevice.c b/drivers/mtd/spi-nor/gigadevice.c
> index d57ddaf1525b..7cf142c75529 100644
> --- a/drivers/mtd/spi-nor/gigadevice.c
> +++ b/drivers/mtd/spi-nor/gigadevice.c
> @@ -62,8 +62,7 @@ static const struct flash_info gigadevice_nor_parts[] = {
> FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
> NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
> SPI_NOR_QUAD_READ) },
> - { "gd25q256", INFO(0xc84019, 0, 64 * 1024, 512)
> - PARSE_SFDP
> + { "gd25q256", INFO(0xc84019, 0, 64 * 1024, 0)
> FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_TB_SR_BIT6)
> FIXUP_FLAGS(SPI_NOR_4B_OPCODES)
> .fixups = &gd25q256_fixups },
> diff --git a/drivers/mtd/spi-nor/issi.c b/drivers/mtd/spi-nor/issi.c
> index accdf7aa2bfd..9d22b799ce94 100644
> --- a/drivers/mtd/spi-nor/issi.c
> +++ b/drivers/mtd/spi-nor/issi.c
> @@ -62,8 +62,7 @@ static const struct flash_info issi_nor_parts[] = {
> NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ) },
> { "is25lp128", INFO(0x9d6018, 0, 64 * 1024, 256)
> NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ) },
> - { "is25lp256", INFO(0x9d6019, 0, 64 * 1024, 512)
> - PARSE_SFDP
> + { "is25lp256", INFO(0x9d6019, 0, 64 * 1024, 0)
> FIXUP_FLAGS(SPI_NOR_4B_OPCODES)
> .fixups = &is25lp256_fixups },
> { "is25wp032", INFO(0x9d7016, 0, 64 * 1024, 64)
> @@ -73,7 +72,6 @@ static const struct flash_info issi_nor_parts[] = {
> { "is25wp128", INFO(0x9d7018, 0, 64 * 1024, 256)
> NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
> { "is25wp256", INFO(0x9d7019, 0, 0, 0)
> - PARSE_SFDP
> FIXUP_FLAGS(SPI_NOR_4B_OPCODES)
> FLAGS(SPI_NOR_QUAD_PP)
> .fixups = &is25lp256_fixups },
> diff --git a/drivers/mtd/spi-nor/macronix.c b/drivers/mtd/spi-nor/macronix.c
> index eb149e517c1f..0f3bd3ed8eff 100644
> --- a/drivers/mtd/spi-nor/macronix.c
> +++ b/drivers/mtd/spi-nor/macronix.c
> @@ -83,7 +83,6 @@ static const struct flash_info macronix_nor_parts[] = {
> NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)
> FIXUP_FLAGS(SPI_NOR_4B_OPCODES) },
> { "mx25uw51245g", INFOB(0xc2813a, 0, 0, 0, 4)
> - PARSE_SFDP
> FLAGS(SPI_NOR_RWW) },
> { "mx25v8035f", INFO(0xc22314, 0, 64 * 1024, 16)
> NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
> diff --git a/drivers/mtd/spi-nor/spansion.c b/drivers/mtd/spi-nor/spansion.c
> index 709822fced86..e6468569f178 100644
> --- a/drivers/mtd/spi-nor/spansion.c
> +++ b/drivers/mtd/spi-nor/spansion.c
> @@ -849,59 +849,47 @@ static const struct flash_info spansion_nor_parts[] = {
> NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)
> FIXUP_FLAGS(SPI_NOR_4B_OPCODES) },
> { "s25fs256t", INFO6(0x342b19, 0x0f0890, 0, 0)
> - PARSE_SFDP
> MFR_FLAGS(USE_CLPEF)
> .fixups = &s25fs256t_fixups },
> { "s25hl512t", INFO6(0x342a1a, 0x0f0390, 0, 0)
> - PARSE_SFDP
> MFR_FLAGS(USE_CLPEF)
> .fixups = &s25hx_t_fixups },
> { "s25hl01gt", INFO6(0x342a1b, 0x0f0390, 0, 0)
> - PARSE_SFDP
> MFR_FLAGS(USE_CLPEF)
> .fixups = &s25hx_t_fixups },
> { "s25hl02gt", INFO6(0x342a1c, 0x0f0090, 0, 0)
> - PARSE_SFDP
> MFR_FLAGS(USE_CLPEF)
> FLAGS(NO_CHIP_ERASE)
> .fixups = &s25hx_t_fixups },
> { "s25hs512t", INFO6(0x342b1a, 0x0f0390, 0, 0)
> - PARSE_SFDP
> MFR_FLAGS(USE_CLPEF)
> .fixups = &s25hx_t_fixups },
> { "s25hs01gt", INFO6(0x342b1b, 0x0f0390, 0, 0)
> - PARSE_SFDP
> MFR_FLAGS(USE_CLPEF)
> .fixups = &s25hx_t_fixups },
> { "s25hs02gt", INFO6(0x342b1c, 0x0f0090, 0, 0)
> - PARSE_SFDP
> MFR_FLAGS(USE_CLPEF)
> FLAGS(NO_CHIP_ERASE)
> .fixups = &s25hx_t_fixups },
> { "cy15x104q", INFO6(0x042cc2, 0x7f7f7f, 512 * 1024, 1)
> FLAGS(SPI_NOR_NO_ERASE) },
> { "s28hl512t", INFO(0x345a1a, 0, 0, 0)
> - PARSE_SFDP
> MFR_FLAGS(USE_CLPEF)
> .fixups = &s28hx_t_fixups,
> },
> { "s28hl01gt", INFO(0x345a1b, 0, 0, 0)
> - PARSE_SFDP
> MFR_FLAGS(USE_CLPEF)
> .fixups = &s28hx_t_fixups,
> },
> { "s28hs512t", INFO(0x345b1a, 0, 0, 0)
> - PARSE_SFDP
> MFR_FLAGS(USE_CLPEF)
> .fixups = &s28hx_t_fixups,
> },
> { "s28hs01gt", INFO(0x345b1b, 0, 0, 0)
> - PARSE_SFDP
> MFR_FLAGS(USE_CLPEF)
> .fixups = &s28hx_t_fixups,
> },
> { "s28hs02gt", INFO(0x345b1c, 0, 0, 0)
> - PARSE_SFDP
> MFR_FLAGS(USE_CLPEF)
> .fixups = &s28hx_t_fixups,
> },
> diff --git a/drivers/mtd/spi-nor/sst.c b/drivers/mtd/spi-nor/sst.c
> index 197d2c1101ed..57df68eab6aa 100644
> --- a/drivers/mtd/spi-nor/sst.c
> +++ b/drivers/mtd/spi-nor/sst.c
> @@ -115,7 +115,6 @@ static const struct flash_info sst_nor_parts[] = {
> NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ) },
> { "sst26vf032b", INFO(0xbf2642, 0, 0, 0)
> FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE)
> - PARSE_SFDP
> .fixups = &sst26vf_nor_fixups },
> { "sst26vf064b", INFO(0xbf2643, 0, 64 * 1024, 128)
> FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE)
> diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
> index cd99c9a1c568..c21fed842762 100644
> --- a/drivers/mtd/spi-nor/winbond.c
> +++ b/drivers/mtd/spi-nor/winbond.c
> @@ -126,8 +126,7 @@ static const struct flash_info winbond_nor_parts[] = {
> { "w25q256", INFO(0xef4019, 0, 64 * 1024, 512)
> NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)
> .fixups = &w25q256_fixups },
> - { "w25q256jvm", INFO(0xef7019, 0, 64 * 1024, 512)
> - PARSE_SFDP },
> + { "w25q256jvm", INFO(0xef7019, 0, 64 * 1024, 0) },
> { "w25q256jw", INFO(0xef6019, 0, 64 * 1024, 512)
> NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
> SPI_NOR_QUAD_READ) },
> @@ -135,10 +134,8 @@ static const struct flash_info winbond_nor_parts[] = {
> NO_SFDP_FLAGS(SECT_4K | SPI_NOR_QUAD_READ |
> SPI_NOR_DUAL_READ) },
> { "w25q512nwq", INFO(0xef6020, 0, 0, 0)
> - PARSE_SFDP
> OTP_INFO(256, 3, 0x1000, 0x1000) },
> - { "w25q512nwm", INFO(0xef8020, 0, 64 * 1024, 1024)
> - PARSE_SFDP
> + { "w25q512nwm", INFO(0xef8020, 0, 64 * 1024, 0)
> OTP_INFO(256, 3, 0x1000, 0x1000) },
> { "w25q512jvq", INFO(0xef4020, 0, 64 * 1024, 1024)
> NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
>
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