[U-Boot] [PATCH v6 2/2] common: Generic firmware loader for file system

[Marek Vasut]

On 12/27/2017 06:04 AM, tien.fong.chee at intel.com wrote:

Whoa, this improved substantially since last time I checked. Minor
nitpicks below.

[...]

> +/* USB build is not supported yet in SPL */
> +#ifndef CONFIG_SPL_BUILD
> +#ifdef CONFIG_USB_STORAGE
> +static int init_usb(void)
> +{
> +	int err;
> +
> +	err = usb_init();
> +	if (err)
> +		return err;
> +
> +#ifndef CONFIG_DM_USB
> +	err = usb_stor_scan(1) < 0 ? -ENODEV : 0;

if (err)
	return err;
?

> +#endif
> +
> +	return err;
> +}
> +#else
> +static int init_usb(void)
> +{
> +	printf("Error: Cannot load flash image: no USB support\n");

debug() ? Fix globally ...

> +	return -ENOSYS;
> +}
> +#endif
> +#endif
> +
> +#ifdef CONFIG_SATA
> +static int init_storage_sata(void)
> +{
> +	return sata_probe(0);
> +}
> +#else
> +static int init_storage_sata(void)
> +{
> +	printf("Error: Cannot load image: no SATA support\n");
> +	return -ENOSYS;
> +}
> +#endif
> +
> +#ifdef CONFIG_CMD_UBIFS
> +static int mount_ubifs(struct device_location *location)
> +{
> +	int ret;
> +	char cmd[32];
> +
> +	sprintf(cmd, "ubi part %s", location->mtdpart);

snprintf() ...

> +	ret = run_command(cmd, 0);
> +	if (ret)
> +		return ret;
> +
> +	sprintf(cmd, "ubifsmount %s", location->ubivol);
> +
> +	ret = run_command(cmd, 0);
> +
> +	return ret;
> +}
> +
> +static int umount_ubifs(void)
> +{
> +	return run_command("ubifsumount", 0);

Just call the function directly ?

> +}
> +#else
> +static int mount_ubifs(struct device_location *location)
> +{
> +	printf("Error: Cannot load image: no UBIFS support\n");
> +	return -ENOSYS;
> +}
> +#endif
> +
> +#if defined(CONFIG_SPL_MMC_SUPPORT) && defined(CONFIG_SPL_BUILD)
> +static int init_mmc(void)
> +{
> +	/* Just for the case MMC is not yet initialized */
> +	struct mmc *mmc = NULL;
> +	int err;
> +
> +	spl_mmc_find_device(&mmc, spl_boot_device());
> +
> +	err = mmc_init(mmc);
> +	if (err) {
> +		printf("spl: mmc init failed with error: %d\n", err);
> +		return err;
> +	}
> +
> +	return err;
> +}
> +#else
> +static int init_mmc(void)
> +{
> +	/* Expect somewhere already initialize MMC */
> +	return 0;
> +}
> +#endif
> +
> +static int select_fs_dev(struct device_location *location)
> +{
> +	int ret;
> +
> +	if (!strcmp("mmc", location->name)) {
> +		ret = fs_set_blk_dev("mmc", location->devpart, FS_TYPE_ANY);
> +	} else if (!strcmp("usb", location->name)) {
> +		ret = fs_set_blk_dev("usb", location->devpart, FS_TYPE_ANY);
> +	} else if (!strcmp("sata", location->name)) {
> +		ret = fs_set_blk_dev("sata", location->devpart, FS_TYPE_ANY);
> +	} else if (!strcmp("ubi", location->name)) {
> +		if (location->ubivol != NULL)
> +			ret = fs_set_blk_dev("ubi", NULL, FS_TYPE_UBIFS);
> +		else
> +			ret = -ENODEV;
> +	} else {
> +		printf("Error: unsupported location storage.\n");
> +		return -ENODEV;
> +	}
> +
> +	if (ret)
> +		printf("Error: could not access storage.\n");
> +
> +	return ret;
> +}
> +
> +static int init_storage_device(struct device_location *location)
> +{
> +	int ret;
> +
> +	if (!strcmp("mmc", location->name)) {
> +		ret = init_mmc();
> +	} else if (!strcmp("sata", location->name)) {
> +		ret = init_storage_sata();
> +	} else if (location->ubivol != NULL) {
> +		ret = mount_ubifs(location);
> +#ifndef CONFIG_SPL_BUILD
> +	/* USB build is not supported yet in SPL */
> +	} else if (!strcmp("usb", location->name)) {
> +		ret = init_usb();
> +#endif
> +	} else {
> +		printf("Error: no supported storage device is available.\n");
> +		ret = -ENODEV;
> +	}
> +
> +	return ret;
> +}
> +
> +static void set_storage_devpart(char *name, char *devpart)
> +{
> +	size_t i;
> +
> +	for (i = 0; i < ARRAY_SIZE(default_locations); i++) {
> +		if (!strcmp(default_locations[i].name, name))
> +			default_locations[i].devpart = devpart;
> +	}
> +}
> +
> +/*
> + * Prepare firmware struct;
> + * return -ve if fail.

Use kerneldoc and keep it consistent.

> + */
> +static int _request_firmware_prepare(struct firmware **firmware_p,
> +				     const char *name, void *dbuf,
> +				     size_t size, u32 offset)
> +{
> +	struct firmware *firmware;
> +	struct firmware_priv *fw_priv;
> +
> +	*firmware_p = NULL;
> +
> +	if (!name || name[0] == '\0')
> +		return -EINVAL;
> +
> +	firmware = calloc(1, sizeof(*firmware));
> +	if (!firmware) {
> +		printf("%s: calloc(struct firmware) failed\n", __func__);

If malloc fails, you're screwed anyway and printf will likely fail too,
so drop it.

> +		return -ENOMEM;
> +	}
> +
> +	fw_priv = calloc(1, sizeof(*fw_priv));
> +	if (!fw_priv) {
> +		printf("%s: calloc(struct fw_priv) failed\n", __func__);
> +		free(firmware);
> +		return -ENOMEM;
> +	}
> +
> +	fw_priv->name = name;
> +	fw_priv->offset = offset;
> +	firmware->data = dbuf;
> +	firmware->size = size;
> +	firmware->priv = fw_priv;
> +	*firmware_p = firmware;
> +
> +	return 0;
> +}
[...]
-- 
Best regards,
Marek Vasut