-----Original Message-----
From: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Sent: Friday, September 20, 2024 5:32 PM
To: Pankaj Gupta <pankaj.gupta@xxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>; Rob Herring <robh@xxxxxxxxxx>;
Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx>; Conor Dooley
<conor+dt@xxxxxxxxxx>; Shawn Guo <shawnguo@xxxxxxxxxx>; Pengutronix Kernel
Team <kernel@xxxxxxxxxxxxxx>; Fabio Estevam <festevam@xxxxxxxxx>; Rob
Herring <robh+dt@xxxxxxxxxx>; linux-doc@xxxxxxxxxxxxxxx;
linux-kernel@xxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx;
imx@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [EXT] Re: [PATCH v7 4/5] firmware: imx: add driver for NXP
EdgeLock Enclave
Caution: This is an external email. Please take care when clicking links or
opening attachments. When in doubt, report the message using the 'Report
this email' button
Hi Pankaj,
On Thu, Sep 19, 2024 at 06:43:45AM +0000, Pankaj Gupta wrote:
> > +static void se_load_firmware(const struct firmware *fw, void
> > +*context) {
> > + struct se_if_priv *priv = context;
> > + const struct se_if_node_info *info = priv->info;
> > + phys_addr_t se_fw_phyaddr;
> > + u8 *se_fw_buf;
> > + int ret;
> > +
> > + if (!fw) {
> > + if (priv->fw_fail > MAX_FW_LOAD_RETRIES)
> > + dev_dbg(priv->dev,
> > + "External FW not found, using ROM
FW.\n");
> > + else {
> > + /*add a bit delay to wait for firmware priv
released
> */
> > + msleep(20);
> > +
> > + /* Load firmware one more time if timeout */
> > + request_firmware_nowait(THIS_MODULE,
> > + FW_ACTION_UEVENT,
> priv->se_img_file_to_load,
> > + priv->dev, GFP_KERNEL, priv,
> > + se_load_firmware);
> > + priv->fw_fail++;
> > + dev_dbg(priv->dev, "Value of retries = 0x%x.\n",
> > + priv->fw_fail);
> > + }
> > +
> > + return;
> > + }
>
> > Are you continuously trying to load the firmware here in the hope that
the
> >rootfs is mounted before your retry counter exceeds?
>
>> Yes.
>
> > Don't do this.
>
>> Shall the retry counter to be removed, to make it predictable?
>>Or am I missing something.
>Either compile the firmware into the kernel or the ELE driver as module.
Cannot compile as part of Firmware.
There are OTA scenarios where the latest FW, that is downloaded to replace
the image in RFS, and FW needs to be re-init with this new image, by putting
the Linux to power-down state.
ELE driver is compiled as module only, by default. But if someone like to
make it as in-line to kernel image, still it should work.
>Sascha
--
Pengutronix e.K. | |
Steuerwalder Str. 21 |
https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.pengutr
onix.de%2F&data=05%7C02%7Cpankaj.gupta%40nxp.com%7C136e82e202f34606acfa08dcd
96c1790%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C638624305558398562%7CUn
known%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJX
VCI6Mn0%3D%7C0%7C%7C%7C&sdata=zx%2FjUGWs2qNnz4clLydY5%2BWNDVZoQ2AdP4ML5BeTjq
Q%3D&reserved=0 |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
Attachment:
smime.p7s
Description: S/MIME cryptographic signature
