| Message ID | 20180720151527.16038-36-miquel.raynal@bootlin.com |
|---|---|
| State | Changes Requested |
| Delegated to: | Miquel Raynal |
| Headers | show |
| Series | Allow dynamic allocations during NAND chip identification phase | expand |
On Fri, 20 Jul 2018 17:15:27 +0200 Miquel Raynal <miquel.raynal@bootlin.com> wrote: > Now that it is possible to do dynamic allocations during the > identification phase, convert the onfi_params structure (which is only > needed with ONFI compliant chips) into a pointer that will be allocated > only if needed. > > Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> > --- > drivers/mtd/nand/raw/nand_base.c | 54 +++++++++++++++++++++++-------------- > drivers/mtd/nand/raw/nand_micron.c | 6 ++--- > drivers/mtd/nand/raw/nand_timings.c | 12 ++++----- > include/linux/mtd/rawnand.h | 6 ++--- > 4 files changed, 46 insertions(+), 32 deletions(-) > > diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c > index 8645f655e5b0..ed9e2f1578e6 100644 > --- a/drivers/mtd/nand/raw/nand_base.c > +++ b/drivers/mtd/nand/raw/nand_base.c > @@ -5151,6 +5151,8 @@ static int nand_flash_detect_onfi(struct nand_chip *chip) > { > struct mtd_info *mtd = nand_to_mtd(chip); > struct nand_onfi_params *p; > + struct onfi_params *onfi; > + int onfi_version = 0; > char id[4]; > int i, ret, val; > > @@ -5206,21 +5208,19 @@ static int nand_flash_detect_onfi(struct nand_chip *chip) > /* Check version */ > val = le16_to_cpu(p->revision); > if (val & ONFI_VERSION_2_3) > - chip->parameters.onfi.version = 23; > + onfi_version = 23; > else if (val & ONFI_VERSION_2_2) > - chip->parameters.onfi.version = 22; > + onfi_version = 22; > else if (val & ONFI_VERSION_2_1) > - chip->parameters.onfi.version = 21; > + onfi_version = 21; > else if (val & ONFI_VERSION_2_0) > - chip->parameters.onfi.version = 20; > + onfi_version = 20; > else if (val & ONFI_VERSION_1_0) > - chip->parameters.onfi.version = 10; > + onfi_version = 10; > > - if (!chip->parameters.onfi.version) { > + if (!onfi_version) { > pr_info("unsupported ONFI version: %d\n", val); > goto free_onfi_param_page; > - } else { > - ret = 1; > } > > sanitize_string(p->manufacturer, sizeof(p->manufacturer)); > @@ -5257,7 +5257,7 @@ static int nand_flash_detect_onfi(struct nand_chip *chip) > if (p->ecc_bits != 0xff) { > chip->ecc_strength_ds = p->ecc_bits; > chip->ecc_step_ds = 512; > - } else if (chip->parameters.onfi.version >= 21 && > + } else if (onfi_version >= 21 && > (le16_to_cpu(p->features) & ONFI_FEATURE_EXT_PARAM_PAGE)) { > > /* > @@ -5284,19 +5284,33 @@ static int nand_flash_detect_onfi(struct nand_chip *chip) > bitmap_set(chip->parameters.set_feature_list, > ONFI_FEATURE_ADDR_TIMING_MODE, 1); > } > - chip->parameters.onfi.tPROG = le16_to_cpu(p->t_prog); > - chip->parameters.onfi.tBERS = le16_to_cpu(p->t_bers); > - chip->parameters.onfi.tR = le16_to_cpu(p->t_r); > - chip->parameters.onfi.tCCS = le16_to_cpu(p->t_ccs); > - chip->parameters.onfi.async_timing_mode = > - le16_to_cpu(p->async_timing_mode); > - chip->parameters.onfi.vendor_revision = > - le16_to_cpu(p->vendor_revision); > - memcpy(chip->parameters.onfi.vendor, p->vendor, > - sizeof(p->vendor)); > > + onfi = kzalloc(sizeof(*onfi), GFP_KERNEL); > + if (!onfi) { > + ret = -ENOMEM; > + goto free_model; > + } > + > + onfi->version = onfi_version; > + onfi->tPROG = le16_to_cpu(p->t_prog); > + onfi->tBERS = le16_to_cpu(p->t_bers); > + onfi->tR = le16_to_cpu(p->t_r); > + onfi->tCCS = le16_to_cpu(p->t_ccs); > + onfi->async_timing_mode = le16_to_cpu(p->async_timing_mode); > + onfi->vendor_revision = le16_to_cpu(p->vendor_revision); > + memcpy(onfi->vendor, p->vendor, sizeof(p->vendor)); > + chip->parameters.onfi = onfi; > + > + /* Identification done, free the full ONFI parameter page and exit */ > + kfree(p); > + > + return 1; > + > +free_model: > + kfree(chip->parameters.model); > free_onfi_param_page: > kfree(p); > + > return ret; > } > > @@ -5693,7 +5707,6 @@ static int nand_detect(struct nand_chip *chip, struct nand_flash_dev *type) > } > } > > - chip->parameters.onfi.version = 0; > if (!type->name || !type->pagesize) { > /* Check if the chip is ONFI compliant */ > ret = nand_flash_detect_onfi(chip); > @@ -6039,6 +6052,7 @@ static int nand_scan_ident(struct mtd_info *mtd, int maxchips, > static void nand_scan_ident_cleanup(struct nand_chip *chip) > { > kfree(chip->parameters.model); > + kfree(chip->parameters.onfi); > } > > static int nand_set_ecc_soft_ops(struct mtd_info *mtd) > diff --git a/drivers/mtd/nand/raw/nand_micron.c b/drivers/mtd/nand/raw/nand_micron.c > index 656947d91841..8466a1740b3b 100644 > --- a/drivers/mtd/nand/raw/nand_micron.c > +++ b/drivers/mtd/nand/raw/nand_micron.c > @@ -88,9 +88,9 @@ static int micron_nand_setup_read_retry(struct mtd_info *mtd, int retry_mode) > static int micron_nand_onfi_init(struct nand_chip *chip) > { > struct nand_parameters *p = &chip->parameters; > - struct nand_onfi_vendor_micron *micron = (void *)p->onfi.vendor; > + struct nand_onfi_vendor_micron *micron = (void *)p->onfi->vendor; > > - if (chip->parameters.onfi.version && p->onfi.vendor_revision) { > + if (p->onfi && p->onfi->vendor_revision) { I think p->onfi != NULL guarantees that p->onfi->vendor_revision != 0. if (p->onfi) should be enough. Looks good otherwise. Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com> > chip->read_retries = micron->read_retry_options; > chip->setup_read_retry = micron_nand_setup_read_retry; > } > @@ -382,7 +382,7 @@ static int micron_supports_on_die_ecc(struct nand_chip *chip) > u8 id[5]; > int ret; > > - if (!chip->parameters.onfi.version) > + if (!chip->parameters.onfi) > return MICRON_ON_DIE_UNSUPPORTED; > > if (chip->bits_per_cell != 1) > diff --git a/drivers/mtd/nand/raw/nand_timings.c b/drivers/mtd/nand/raw/nand_timings.c > index 9bb599106a31..ebc7b5f76f77 100644 > --- a/drivers/mtd/nand/raw/nand_timings.c > +++ b/drivers/mtd/nand/raw/nand_timings.c > @@ -294,6 +294,7 @@ int onfi_fill_data_interface(struct nand_chip *chip, > int timing_mode) > { > struct nand_data_interface *iface = &chip->data_interface; > + struct onfi_params *onfi = chip->parameters.onfi; > > if (type != NAND_SDR_IFACE) > return -EINVAL; > @@ -308,17 +309,16 @@ int onfi_fill_data_interface(struct nand_chip *chip, > * tPROG, tBERS, tR and tCCS. > * These information are part of the ONFI parameter page. > */ > - if (chip->parameters.onfi.version) { > - struct nand_parameters *params = &chip->parameters; > + if (onfi) { > struct nand_sdr_timings *timings = &iface->timings.sdr; > > /* microseconds -> picoseconds */ > - timings->tPROG_max = 1000000ULL * params->onfi.tPROG; > - timings->tBERS_max = 1000000ULL * params->onfi.tBERS; > - timings->tR_max = 1000000ULL * params->onfi.tR; > + timings->tPROG_max = 1000000ULL * onfi->tPROG; > + timings->tBERS_max = 1000000ULL * onfi->tBERS; > + timings->tR_max = 1000000ULL * onfi->tR; > > /* nanoseconds -> picoseconds */ > - timings->tCCS_min = 1000UL * params->onfi.tCCS; > + timings->tCCS_min = 1000UL * onfi->tCCS; > } else { > struct nand_sdr_timings *timings = &iface->timings.sdr; > /* > diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h > index 5723d940a47d..8074cbd4e3fe 100644 > --- a/include/linux/mtd/rawnand.h > +++ b/include/linux/mtd/rawnand.h > @@ -488,7 +488,7 @@ struct nand_parameters { > DECLARE_BITMAP(get_feature_list, ONFI_FEATURE_NUMBER); > > /* ONFI parameters */ > - struct onfi_params onfi; > + struct onfi_params *onfi; > }; > > /* The maximum expected count of bytes in the NAND ID sequence */ > @@ -1618,10 +1618,10 @@ struct platform_nand_data { > /* return the supported asynchronous timing mode. */ > static inline int onfi_get_async_timing_mode(struct nand_chip *chip) > { > - if (!chip->parameters.onfi.version) > + if (!chip->parameters.onfi) > return ONFI_TIMING_MODE_UNKNOWN; > > - return chip->parameters.onfi.async_timing_mode; > + return chip->parameters.onfi->async_timing_mode; > } > > int onfi_fill_data_interface(struct nand_chip *chip,
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c index 8645f655e5b0..ed9e2f1578e6 100644 --- a/drivers/mtd/nand/raw/nand_base.c +++ b/drivers/mtd/nand/raw/nand_base.c @@ -5151,6 +5151,8 @@ static int nand_flash_detect_onfi(struct nand_chip *chip) { struct mtd_info *mtd = nand_to_mtd(chip); struct nand_onfi_params *p; + struct onfi_params *onfi; + int onfi_version = 0; char id[4]; int i, ret, val; @@ -5206,21 +5208,19 @@ static int nand_flash_detect_onfi(struct nand_chip *chip) /* Check version */ val = le16_to_cpu(p->revision); if (val & ONFI_VERSION_2_3) - chip->parameters.onfi.version = 23; + onfi_version = 23; else if (val & ONFI_VERSION_2_2) - chip->parameters.onfi.version = 22; + onfi_version = 22; else if (val & ONFI_VERSION_2_1) - chip->parameters.onfi.version = 21; + onfi_version = 21; else if (val & ONFI_VERSION_2_0) - chip->parameters.onfi.version = 20; + onfi_version = 20; else if (val & ONFI_VERSION_1_0) - chip->parameters.onfi.version = 10; + onfi_version = 10; - if (!chip->parameters.onfi.version) { + if (!onfi_version) { pr_info("unsupported ONFI version: %d\n", val); goto free_onfi_param_page; - } else { - ret = 1; } sanitize_string(p->manufacturer, sizeof(p->manufacturer)); @@ -5257,7 +5257,7 @@ static int nand_flash_detect_onfi(struct nand_chip *chip) if (p->ecc_bits != 0xff) { chip->ecc_strength_ds = p->ecc_bits; chip->ecc_step_ds = 512; - } else if (chip->parameters.onfi.version >= 21 && + } else if (onfi_version >= 21 && (le16_to_cpu(p->features) & ONFI_FEATURE_EXT_PARAM_PAGE)) { /* @@ -5284,19 +5284,33 @@ static int nand_flash_detect_onfi(struct nand_chip *chip) bitmap_set(chip->parameters.set_feature_list, ONFI_FEATURE_ADDR_TIMING_MODE, 1); } - chip->parameters.onfi.tPROG = le16_to_cpu(p->t_prog); - chip->parameters.onfi.tBERS = le16_to_cpu(p->t_bers); - chip->parameters.onfi.tR = le16_to_cpu(p->t_r); - chip->parameters.onfi.tCCS = le16_to_cpu(p->t_ccs); - chip->parameters.onfi.async_timing_mode = - le16_to_cpu(p->async_timing_mode); - chip->parameters.onfi.vendor_revision = - le16_to_cpu(p->vendor_revision); - memcpy(chip->parameters.onfi.vendor, p->vendor, - sizeof(p->vendor)); + onfi = kzalloc(sizeof(*onfi), GFP_KERNEL); + if (!onfi) { + ret = -ENOMEM; + goto free_model; + } + + onfi->version = onfi_version; + onfi->tPROG = le16_to_cpu(p->t_prog); + onfi->tBERS = le16_to_cpu(p->t_bers); + onfi->tR = le16_to_cpu(p->t_r); + onfi->tCCS = le16_to_cpu(p->t_ccs); + onfi->async_timing_mode = le16_to_cpu(p->async_timing_mode); + onfi->vendor_revision = le16_to_cpu(p->vendor_revision); + memcpy(onfi->vendor, p->vendor, sizeof(p->vendor)); + chip->parameters.onfi = onfi; + + /* Identification done, free the full ONFI parameter page and exit */ + kfree(p); + + return 1; + +free_model: + kfree(chip->parameters.model); free_onfi_param_page: kfree(p); + return ret; } @@ -5693,7 +5707,6 @@ static int nand_detect(struct nand_chip *chip, struct nand_flash_dev *type) } } - chip->parameters.onfi.version = 0; if (!type->name || !type->pagesize) { /* Check if the chip is ONFI compliant */ ret = nand_flash_detect_onfi(chip); @@ -6039,6 +6052,7 @@ static int nand_scan_ident(struct mtd_info *mtd, int maxchips, static void nand_scan_ident_cleanup(struct nand_chip *chip) { kfree(chip->parameters.model); + kfree(chip->parameters.onfi); } static int nand_set_ecc_soft_ops(struct mtd_info *mtd) diff --git a/drivers/mtd/nand/raw/nand_micron.c b/drivers/mtd/nand/raw/nand_micron.c index 656947d91841..8466a1740b3b 100644 --- a/drivers/mtd/nand/raw/nand_micron.c +++ b/drivers/mtd/nand/raw/nand_micron.c @@ -88,9 +88,9 @@ static int micron_nand_setup_read_retry(struct mtd_info *mtd, int retry_mode) static int micron_nand_onfi_init(struct nand_chip *chip) { struct nand_parameters *p = &chip->parameters; - struct nand_onfi_vendor_micron *micron = (void *)p->onfi.vendor; + struct nand_onfi_vendor_micron *micron = (void *)p->onfi->vendor; - if (chip->parameters.onfi.version && p->onfi.vendor_revision) { + if (p->onfi && p->onfi->vendor_revision) { chip->read_retries = micron->read_retry_options; chip->setup_read_retry = micron_nand_setup_read_retry; } @@ -382,7 +382,7 @@ static int micron_supports_on_die_ecc(struct nand_chip *chip) u8 id[5]; int ret; - if (!chip->parameters.onfi.version) + if (!chip->parameters.onfi) return MICRON_ON_DIE_UNSUPPORTED; if (chip->bits_per_cell != 1) diff --git a/drivers/mtd/nand/raw/nand_timings.c b/drivers/mtd/nand/raw/nand_timings.c index 9bb599106a31..ebc7b5f76f77 100644 --- a/drivers/mtd/nand/raw/nand_timings.c +++ b/drivers/mtd/nand/raw/nand_timings.c @@ -294,6 +294,7 @@ int onfi_fill_data_interface(struct nand_chip *chip, int timing_mode) { struct nand_data_interface *iface = &chip->data_interface; + struct onfi_params *onfi = chip->parameters.onfi; if (type != NAND_SDR_IFACE) return -EINVAL; @@ -308,17 +309,16 @@ int onfi_fill_data_interface(struct nand_chip *chip, * tPROG, tBERS, tR and tCCS. * These information are part of the ONFI parameter page. */ - if (chip->parameters.onfi.version) { - struct nand_parameters *params = &chip->parameters; + if (onfi) { struct nand_sdr_timings *timings = &iface->timings.sdr; /* microseconds -> picoseconds */ - timings->tPROG_max = 1000000ULL * params->onfi.tPROG; - timings->tBERS_max = 1000000ULL * params->onfi.tBERS; - timings->tR_max = 1000000ULL * params->onfi.tR; + timings->tPROG_max = 1000000ULL * onfi->tPROG; + timings->tBERS_max = 1000000ULL * onfi->tBERS; + timings->tR_max = 1000000ULL * onfi->tR; /* nanoseconds -> picoseconds */ - timings->tCCS_min = 1000UL * params->onfi.tCCS; + timings->tCCS_min = 1000UL * onfi->tCCS; } else { struct nand_sdr_timings *timings = &iface->timings.sdr; /* diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h index 5723d940a47d..8074cbd4e3fe 100644 --- a/include/linux/mtd/rawnand.h +++ b/include/linux/mtd/rawnand.h @@ -488,7 +488,7 @@ struct nand_parameters { DECLARE_BITMAP(get_feature_list, ONFI_FEATURE_NUMBER); /* ONFI parameters */ - struct onfi_params onfi; + struct onfi_params *onfi; }; /* The maximum expected count of bytes in the NAND ID sequence */ @@ -1618,10 +1618,10 @@ struct platform_nand_data { /* return the supported asynchronous timing mode. */ static inline int onfi_get_async_timing_mode(struct nand_chip *chip) { - if (!chip->parameters.onfi.version) + if (!chip->parameters.onfi) return ONFI_TIMING_MODE_UNKNOWN; - return chip->parameters.onfi.async_timing_mode; + return chip->parameters.onfi->async_timing_mode; } int onfi_fill_data_interface(struct nand_chip *chip,
Now that it is possible to do dynamic allocations during the identification phase, convert the onfi_params structure (which is only needed with ONFI compliant chips) into a pointer that will be allocated only if needed. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> --- drivers/mtd/nand/raw/nand_base.c | 54 +++++++++++++++++++++++-------------- drivers/mtd/nand/raw/nand_micron.c | 6 ++--- drivers/mtd/nand/raw/nand_timings.c | 12 ++++----- include/linux/mtd/rawnand.h | 6 ++--- 4 files changed, 46 insertions(+), 32 deletions(-)