From: Guenter Roeck <linux@roeck-us.net>
To: "Álvaro Fernández Rojas" <noltari@gmail.com>
Cc: tsbogend@alpha.franken.de, f.fainelli@gmail.com,
bcm-kernel-feedback-list@broadcom.com, miquel.raynal@bootlin.com,
richard@nod.at, vigneshr@ti.com, jonas.gorski@gmail.com,
linus.walleij@linaro.org, linux-mips@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org
Subject: Re: [PATCH v4] mtd: parsers: bcm63xx: simplify CFE detection
Date: Fri, 14 Aug 2020 01:56:17 -0700 [thread overview]
Message-ID: <20200814085617.GA129183@roeck-us.net> (raw)
In-Reply-To: <20200615091740.2958303-1-noltari@gmail.com>
On Mon, Jun 15, 2020 at 11:17:40AM +0200, Álvaro Fernández Rojas wrote:
> Instead of trying to parse CFE version string, which is customized by some
> vendors, let's just check that "CFE1" was passed on argument 3.
>
> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
> Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
mips:allmodconfig:
ERROR: modpost: "fw_arg3" [drivers/mtd/parsers/bcm63xxpart.ko] undefined!
This is not surprising, since fw_arg3 is not exported.
Guenter
> ---
> v4: shorten conditional compilation part as suggested by Miquèl.
> v3: keep COMPILE_TEST compatibility by adding a new function that only checks
> fw_arg3 when CONFIG_MIPS is defined.
> v2: use CFE_EPTSEAL definition and avoid using an additional function.
>
> drivers/mtd/parsers/bcm63xxpart.c | 32 ++++++++++++-------------------
> 1 file changed, 12 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/mtd/parsers/bcm63xxpart.c b/drivers/mtd/parsers/bcm63xxpart.c
> index 78f90c6c18fd..b15bdadaedb5 100644
> --- a/drivers/mtd/parsers/bcm63xxpart.c
> +++ b/drivers/mtd/parsers/bcm63xxpart.c
> @@ -22,6 +22,11 @@
> #include <linux/mtd/partitions.h>
> #include <linux/of.h>
>
> +#ifdef CONFIG_MIPS
> +#include <asm/bootinfo.h>
> +#include <asm/fw/cfe/cfe_api.h>
> +#endif /* CONFIG_MIPS */
> +
> #define BCM963XX_CFE_BLOCK_SIZE SZ_64K /* always at least 64KiB */
>
> #define BCM963XX_CFE_MAGIC_OFFSET 0x4e0
> @@ -32,28 +37,15 @@
> #define STR_NULL_TERMINATE(x) \
> do { char *_str = (x); _str[sizeof(x) - 1] = 0; } while (0)
>
> -static int bcm63xx_detect_cfe(struct mtd_info *master)
> +static inline int bcm63xx_detect_cfe(void)
> {
> - char buf[9];
> - int ret;
> - size_t retlen;
> + int ret = 0;
>
> - ret = mtd_read(master, BCM963XX_CFE_VERSION_OFFSET, 5, &retlen,
> - (void *)buf);
> - buf[retlen] = 0;
> +#ifdef CONFIG_MIPS
> + ret = (fw_arg3 == CFE_EPTSEAL);
> +#endif /* CONFIG_MIPS */
>
> - if (ret)
> - return ret;
> -
> - if (strncmp("cfe-v", buf, 5) == 0)
> - return 0;
> -
> - /* very old CFE's do not have the cfe-v string, so check for magic */
> - ret = mtd_read(master, BCM963XX_CFE_MAGIC_OFFSET, 8, &retlen,
> - (void *)buf);
> - buf[retlen] = 0;
> -
> - return strncmp("CFE1CFE1", buf, 8);
> + return ret;
> }
>
> static int bcm63xx_read_nvram(struct mtd_info *master,
> @@ -138,7 +130,7 @@ static int bcm63xx_parse_cfe_partitions(struct mtd_info *master,
> struct bcm963xx_nvram *nvram = NULL;
> int ret;
>
> - if (bcm63xx_detect_cfe(master))
> + if (!bcm63xx_detect_cfe())
> return -EINVAL;
>
> nvram = vzalloc(sizeof(*nvram));
next prev parent reply other threads:[~2020-08-14 8:56 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-08 9:40 [PATCH 0/2] mtd: parsers: bcm63xx: simplify CFE detection Álvaro Fernández Rojas
2020-06-08 9:40 ` [PATCH 1/2] MIPS: BCM63xx: add helper function to detect CFE Álvaro Fernández Rojas
2020-06-08 9:40 ` [PATCH 2/2] mtd: parsers: bcm63xx: simplify CFE detection Álvaro Fernández Rojas
2020-06-08 16:06 ` [PATCH v2] " Álvaro Fernández Rojas
2020-06-11 7:55 ` Miquel Raynal
2020-06-11 15:16 ` Álvaro Fernández Rojas
2020-06-11 15:42 ` Florian Fainelli
2020-06-11 15:46 ` Miquel Raynal
2020-06-11 16:14 ` Álvaro Fernández Rojas
2020-06-12 7:02 ` Miquel Raynal
2020-06-12 7:30 ` Álvaro Fernández Rojas
2020-06-12 7:33 ` Miquel Raynal
2020-06-12 7:37 ` Álvaro Fernández Rojas
2020-06-12 7:35 ` [PATCH v3] " Álvaro Fernández Rojas
2020-06-15 8:54 ` Miquel Raynal
2020-06-15 9:17 ` [PATCH v4] " Álvaro Fernández Rojas
2020-06-15 16:30 ` Florian Fainelli
2020-06-15 17:38 ` Miquel Raynal
2020-08-14 8:56 ` Guenter Roeck [this message]
2020-09-22 3:18 ` Naresh Kamboju
2020-09-22 3:26 ` Guenter Roeck
2020-09-28 14:16 ` Miquel Raynal
2020-09-28 19:35 ` Florian Fainelli
2020-09-29 17:27 ` [PATCH] mtd: parsers: bcm63xx: Do not make it modular Florian Fainelli
2020-10-02 7:15 ` Miquel Raynal
2020-10-11 14:14 ` Guenter Roeck
2020-10-12 7:04 ` Miquel Raynal
2020-10-12 13:24 ` Guenter Roeck
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