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u-boot/env/sf.c
Ralph Siemsen 04add62e8c env: sf: report malloc error to caller 
In the non-redundant code for env_sf_save(), a failure to malloc() the
temporary buffer produces the following output:

    Saving Environment to SPIFlash... OK

This is misleading as the flash has neither been erased nor written.

Fix it to return an error to the caller, so the output will be:

    Saving Environment to SPIFlash... Failed (-12)

Note that there is another copy of env_sf_save() in the same file, for
handling redundant environment, and it already has the same logic.

Signed-off-by: Ralph Siemsen <ralph.siemsen@linaro.org>
2024-01-29 14:52:23 -05:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2000-2010
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Andreas Heppel <aheppel@sysgo.de>
*
* (C) Copyright 2008 Atmel Corporation
*/
#include <common.h>
#include <dm.h>
#include <env.h>
#include <env_internal.h>
#include <malloc.h>
#include <spi.h>
#include <spi_flash.h>
#include <search.h>
#include <errno.h>
#include <uuid.h>
#include <asm/cache.h>
#include <asm/global_data.h>
#include <dm/device-internal.h>
#include <u-boot/crc.h>
#define OFFSET_INVALID (~(u32)0)
#ifdef CONFIG_ENV_OFFSET_REDUND
#define ENV_OFFSET_REDUND CONFIG_ENV_OFFSET_REDUND
static ulong env_offset = CONFIG_ENV_OFFSET;
static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND;
#else
#define ENV_OFFSET_REDUND OFFSET_INVALID
#endif /* CONFIG_ENV_OFFSET_REDUND */
DECLARE_GLOBAL_DATA_PTR;
static int setup_flash_device(struct spi_flash **env_flash)
{
#if CONFIG_IS_ENABLED(DM_SPI_FLASH)
struct udevice *new;
int ret;
/* speed and mode will be read from DT */
ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
&new);
if (ret) {
env_set_default("spi_flash_probe_bus_cs() failed", 0);
return ret;
}
*env_flash = dev_get_uclass_priv(new);
#else
*env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
if (!*env_flash) {
env_set_default("spi_flash_probe() failed", 0);
return -EIO;
}
#endif
return 0;
}
#if defined(CONFIG_ENV_OFFSET_REDUND)
static int env_sf_save(void)
{
env_t env_new;
char *saved_buffer = NULL, flag = ENV_REDUND_OBSOLETE;
u32 saved_size = 0, saved_offset = 0, sector;
u32 sect_size = CONFIG_ENV_SECT_SIZE;
int ret;
struct spi_flash *env_flash;
ret = setup_flash_device(&env_flash);
if (ret)
return ret;
if (IS_ENABLED(CONFIG_ENV_SECT_SIZE_AUTO))
sect_size = env_flash->mtd.erasesize;
ret = env_export(&env_new);
if (ret)
return -EIO;
env_new.flags = ENV_REDUND_ACTIVE;
if (gd->env_valid == ENV_VALID) {
env_new_offset = CONFIG_ENV_OFFSET_REDUND;
env_offset = CONFIG_ENV_OFFSET;
} else {
env_new_offset = CONFIG_ENV_OFFSET;
env_offset = CONFIG_ENV_OFFSET_REDUND;
}
/* Is the sector larger than the env (i.e. embedded) */
if (sect_size > CONFIG_ENV_SIZE) {
saved_size = sect_size - CONFIG_ENV_SIZE;
saved_offset = env_new_offset + CONFIG_ENV_SIZE;
saved_buffer = memalign(ARCH_DMA_MINALIGN, saved_size);
if (!saved_buffer) {
ret = -ENOMEM;
goto done;
}
ret = spi_flash_read(env_flash, saved_offset,
saved_size, saved_buffer);
if (ret)
goto done;
}
sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, sect_size);
puts("Erasing SPI flash...");
ret = spi_flash_erase(env_flash, env_new_offset,
sector * sect_size);
if (ret)
goto done;
puts("Writing to SPI flash...");
ret = spi_flash_write(env_flash, env_new_offset,
CONFIG_ENV_SIZE, &env_new);
if (ret)
goto done;
if (sect_size > CONFIG_ENV_SIZE) {
ret = spi_flash_write(env_flash, saved_offset,
saved_size, saved_buffer);
if (ret)
goto done;
}
ret = spi_flash_write(env_flash, env_offset + offsetof(env_t, flags),
sizeof(env_new.flags), &flag);
if (ret)
goto done;
puts("done\n");
gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
printf("Valid environment: %d\n", (int)gd->env_valid);
done:
spi_flash_free(env_flash);
if (saved_buffer)
free(saved_buffer);
return ret;
}
static int env_sf_load(void)
{
int ret;
int read1_fail, read2_fail;
env_t *tmp_env1, *tmp_env2;
struct spi_flash *env_flash;
tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN,
CONFIG_ENV_SIZE);
tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
CONFIG_ENV_SIZE);
if (!tmp_env1 || !tmp_env2) {
env_set_default("malloc() failed", 0);
ret = -EIO;
goto out;
}
ret = setup_flash_device(&env_flash);
if (ret)
goto out;
read1_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
CONFIG_ENV_SIZE, tmp_env1);
read2_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
CONFIG_ENV_SIZE, tmp_env2);
ret = env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
read2_fail, H_EXTERNAL);
spi_flash_free(env_flash);
out:
free(tmp_env1);
free(tmp_env2);
return ret;
}
#else
static int env_sf_save(void)
{
u32 saved_size = 0, saved_offset = 0, sector;
u32 sect_size = CONFIG_ENV_SECT_SIZE;
char *saved_buffer = NULL;
int ret = 1;
env_t env_new;
struct spi_flash *env_flash;
ret = setup_flash_device(&env_flash);
if (ret)
return ret;
if (IS_ENABLED(CONFIG_ENV_SECT_SIZE_AUTO))
sect_size = env_flash->mtd.erasesize;
/* Is the sector larger than the env (i.e. embedded) */
if (sect_size > CONFIG_ENV_SIZE) {
saved_size = sect_size - CONFIG_ENV_SIZE;
saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
saved_buffer = malloc(saved_size);
if (!saved_buffer) {
ret = -ENOMEM;
goto done;
}
ret = spi_flash_read(env_flash, saved_offset,
saved_size, saved_buffer);
if (ret)
goto done;
}
ret = env_export(&env_new);
if (ret)
goto done;
sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, sect_size);
puts("Erasing SPI flash...");
ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
sector * sect_size);
if (ret)
goto done;
puts("Writing to SPI flash...");
ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
CONFIG_ENV_SIZE, &env_new);
if (ret)
goto done;
if (sect_size > CONFIG_ENV_SIZE) {
ret = spi_flash_write(env_flash, saved_offset,
saved_size, saved_buffer);
if (ret)
goto done;
}
ret = 0;
puts("done\n");
done:
spi_flash_free(env_flash);
if (saved_buffer)
free(saved_buffer);
return ret;
}
static int env_sf_load(void)
{
int ret;
char *buf = NULL;
struct spi_flash *env_flash;
buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
if (!buf) {
env_set_default("malloc() failed", 0);
return -EIO;
}
ret = setup_flash_device(&env_flash);
if (ret)
goto out;
ret = spi_flash_read(env_flash,
CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
if (ret) {
env_set_default("spi_flash_read() failed", 0);
goto err_read;
}
ret = env_import(buf, 1, H_EXTERNAL);
if (!ret)
gd->env_valid = ENV_VALID;
err_read:
spi_flash_free(env_flash);
out:
free(buf);
return ret;
}
#endif
static int env_sf_erase(void)
{
int ret;
env_t env;
struct spi_flash *env_flash;
ret = setup_flash_device(&env_flash);
if (ret)
return ret;
memset(&env, 0, sizeof(env_t));
ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, &env);
if (ret)
goto done;
if (ENV_OFFSET_REDUND != OFFSET_INVALID)
ret = spi_flash_write(env_flash, ENV_OFFSET_REDUND, CONFIG_ENV_SIZE, &env);
done:
spi_flash_free(env_flash);
return ret;
}
__weak void *env_sf_get_env_addr(void)
{
#ifndef CONFIG_SPL_BUILD
return (void *)CONFIG_ENV_ADDR;
#else
return NULL;
#endif
}
/*
* check if Environment on CONFIG_ENV_ADDR is valid.
*/
static int env_sf_init_addr(void)
{
env_t *env_ptr = (env_t *)env_sf_get_env_addr();
if (!env_ptr)
return -ENOENT;
if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
gd->env_addr = (ulong)&(env_ptr->data);
gd->env_valid = ENV_VALID;
} else {
gd->env_valid = ENV_INVALID;
}
return 0;
}
#if defined(CONFIG_ENV_SPI_EARLY)
/*
* early load environment from SPI flash (before relocation)
* and check if it is valid.
*/
static int env_sf_init_early(void)
{
int ret;
int read1_fail;
int read2_fail;
int crc1_ok;
env_t *tmp_env2 = NULL;
env_t *tmp_env1;
struct spi_flash *env_flash;
/*
* if malloc is not ready yet, we cannot use
* this part yet.
*/
if (!gd->malloc_limit)
return -ENOENT;
tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN,
CONFIG_ENV_SIZE);
if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT))
tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
CONFIG_ENV_SIZE);
if (!tmp_env1 || !tmp_env2)
goto out;
ret = setup_flash_device(&env_flash);
if (ret)
goto out;
read1_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
CONFIG_ENV_SIZE, tmp_env1);
if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT)) {
read2_fail = spi_flash_read(env_flash,
CONFIG_ENV_OFFSET_REDUND,
CONFIG_ENV_SIZE, tmp_env2);
ret = env_check_redund((char *)tmp_env1, read1_fail,
(char *)tmp_env2, read2_fail);
if (ret < 0)
goto err_read;
if (gd->env_valid == ENV_VALID)
gd->env_addr = (unsigned long)&tmp_env1->data;
else
gd->env_addr = (unsigned long)&tmp_env2->data;
} else {
if (read1_fail)
goto err_read;
crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) ==
tmp_env1->crc;
if (!crc1_ok)
goto err_read;
/* if valid -> this is our env */
gd->env_valid = ENV_VALID;
gd->env_addr = (unsigned long)&tmp_env1->data;
}
spi_flash_free(env_flash);
return 0;
err_read:
spi_flash_free(env_flash);
free(tmp_env1);
if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT))
free(tmp_env2);
out:
/* env is not valid. always return 0 */
gd->env_valid = ENV_INVALID;
return 0;
}
#endif
static int env_sf_init(void)
{
int ret = env_sf_init_addr();
if (ret != -ENOENT)
return ret;
#ifdef CONFIG_ENV_SPI_EARLY
return env_sf_init_early();
#endif
/*
* return here -ENOENT, so env_init()
* can set the init bit and later if no
* other Environment storage is defined
* can set the default environment
*/
return -ENOENT;
}
U_BOOT_ENV_LOCATION(sf) = {
.location = ENVL_SPI_FLASH,
ENV_NAME("SPIFlash")
.load = env_sf_load,
.save = ENV_SAVE_PTR(env_sf_save),
.erase = ENV_ERASE_PTR(env_sf_erase),
.init = env_sf_init,
};
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