Re: [PATCH v3 33/33] mtd: rawnand: allocate dynamically ONFI parameters during detection
On Fri, 20 Jul 2018 01:00:26 +0200
Miquel Raynal 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
> ---
> drivers/mtd/nand/raw/nand_base.c| 61
> ++---
> 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, 48 insertions(+), 37 deletions(-)
>
> diff --git a/drivers/mtd/nand/raw/nand_base.c
> b/drivers/mtd/nand/raw/nand_base.c
> index dfee2556a8a8..4dc248769abb 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 *model;
> char id[4];
> int i, ret, val;
> @@ -5207,21 +5209,19 @@ 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));
> @@ -5262,7 +5262,7 @@ 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)) {
>
> /*
> @@ -5289,19 +5289,32 @@ 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(model);
> free_onfi_param_page:
> kfree(p);
> +
> return ret;
> }
>
> @@ -5562,9 +5575,7 @@ static bool find_full_id_nand(struct nand_chip *chip,
> chip->ecc_step_ds = NAND_ECC_STEP(type);
> chip->onfi_timing_mode_default =
> type->onfi_timing_mode_default;
> -
> - strncpy(chip->parameters.model, type->name,
> - sizeof(chip->parameters.model) - 1);
> + chip->parameters.model = type->name;
>
> return true;
> }
> @@ -5703,7 +5714,6 @@ 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 */
>
[PATCH v3 33/33] mtd: rawnand: allocate dynamically ONFI parameters during detection
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
---
drivers/mtd/nand/raw/nand_base.c| 61 ++---
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, 48 insertions(+), 37 deletions(-)
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index dfee2556a8a8..4dc248769abb 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 *model;
char id[4];
int i, ret, val;
@@ -5207,21 +5209,19 @@ 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));
@@ -5262,7 +5262,7 @@ 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)) {
/*
@@ -5289,19 +5289,32 @@ 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(model);
free_onfi_param_page:
kfree(p);
+
return ret;
}
@@ -5562,9 +5575,7 @@ static bool find_full_id_nand(struct nand_chip *chip,
chip->ecc_step_ds = NAND_ECC_STEP(type);
chip->onfi_timing_mode_default =
type->onfi_timing_mode_default;
-
- strncpy(chip->parameters.model, type->name,
- sizeof(chip->parameters.model) - 1);
+ chip->parameters.model = type->name;
return true;
}
@@ -5703,7 +5714,6 @@ 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);
@@ -5723,8 +5733,7 @@ static int nand_detect(struct nand_chip *chip, struct
nand_flash_dev *type)
if
