linux-kernel - Re: [PATCH] remoteproc: qcom: Rename Hexagon v5 PAS driver

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Date:   Wed, 29 Aug 2018 11:25:20 +0200
From:   Niklas Cassel <niklas.cassel@...aro.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Ohad Ben-Cohen <ohad@...ery.com>, linux-remoteproc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Rohit kumar <rohitkr@...eaurora.org>
Subject: Re: [PATCH] remoteproc: qcom: Rename Hexagon v5 PAS driver

On Mon, Aug 27, 2018 at 10:12:03PM -0700, Bjorn Andersson wrote:
> The Hexagon v5 ADSP driver is used for more than only the ADSP and
> there's an upcoming non-PAS ADSP PIL for SDM845, so rename the driver to
> qcom_q6v5_pas in order to better suite this.

Hello Bjorn,

so I'm a bit new to this, but after your rename we will have:

QCOM_Q6V5_PIL
and
QCOM_Q6V5_PAS

that both are PILs.
I guess that the difference is that the latter uses TrustZone?

The ADSP for some QCOM SoCs is a Hexagon v5, therefore the
QCOM_Q6V5_PAS can also boot certain ADSPs?

But we also have QCOM_Q6V5_WCSS
"Qualcomm Hexagon based WCSS Peripheral Image Loader",
which also appears to be Hexagon v5 based, but I assume that
neither QCOM_Q6V5_PIL nor QCOM_Q6V5_PAS can boot the WCSS?

There is also an upcoming non-PAS ADSP PIL loader for SDM845,
but I guess that the ADSP there is not based on Hexagon v5,
so the QCOM_Q6V5_PIL will not be able to boot it?

This all seems to be quite confusing, perhaps the help texts
could be improved to mitigate this confusion?

> 
> Cc: Rohit kumar <rohitkr@...eaurora.org>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
>  drivers/remoteproc/Kconfig                    | 22 +++++++++----------
>  drivers/remoteproc/Makefile                   |  2 +-
>  .../{qcom_adsp_pil.c => qcom_q6v5_pas.c}      |  4 ++--

You should probably also edit the qcom_defconfig:
arch/arm/configs/qcom_defconfig:CONFIG_QCOM_ADSP_PIL=y

>  3 files changed, 14 insertions(+), 14 deletions(-)
>  rename drivers/remoteproc/{qcom_adsp_pil.c => qcom_q6v5_pas.c} (98%)
> 
> diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
> index 052d4dd347f9..c98c0b2a2237 100644
> --- a/drivers/remoteproc/Kconfig
> +++ b/drivers/remoteproc/Kconfig
> @@ -84,8 +84,16 @@ config KEYSTONE_REMOTEPROC
>  	  It's safe to say N here if you're not interested in the Keystone
>  	  DSPs or just want to use a bare minimum kernel.
>  
> -config QCOM_ADSP_PIL
> -	tristate "Qualcomm ADSP Peripheral Image Loader"
> +config QCOM_RPROC_COMMON
> +	tristate
> +
> +config QCOM_Q6V5_COMMON
> +	tristate
> +	depends on ARCH_QCOM
> +	depends on QCOM_SMEM
> +
> +config QCOM_Q6V5_PAS
> +	tristate "Qualcomm Hexagon v5 Peripheral Authentication Service support"
>  	depends on OF && ARCH_QCOM
>  	depends on QCOM_SMEM
>  	depends on RPMSG_QCOM_SMD || (COMPILE_TEST && RPMSG_QCOM_SMD=n)
> @@ -98,15 +106,7 @@ config QCOM_ADSP_PIL
>  	select QCOM_SCM
>  	help
>  	  Say y here to support the TrustZone based Peripherial Image Loader

Since you are editing this help text, yoy may just as well s/Peripherial/Peripheral.

Kind regards,
Niklas

> -	  for the Qualcomm ADSP remote processors.
> -
> -config QCOM_RPROC_COMMON
> -	tristate
> -
> -config QCOM_Q6V5_COMMON
> -	tristate
> -	depends on ARCH_QCOM
> -	depends on QCOM_SMEM
> +	  for the Qualcomm Hexagon v5 based remote processors.
>  
>  config QCOM_Q6V5_PIL
>  	tristate "Qualcomm Hexagon V5 Peripherial Image Loader"
> diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
> index 03332fa7e2ee..eb86c8ba5a87 100644
> --- a/drivers/remoteproc/Makefile
> +++ b/drivers/remoteproc/Makefile
> @@ -14,9 +14,9 @@ obj-$(CONFIG_OMAP_REMOTEPROC)		+= omap_remoteproc.o
>  obj-$(CONFIG_WKUP_M3_RPROC)		+= wkup_m3_rproc.o
>  obj-$(CONFIG_DA8XX_REMOTEPROC)		+= da8xx_remoteproc.o
>  obj-$(CONFIG_KEYSTONE_REMOTEPROC)	+= keystone_remoteproc.o
> -obj-$(CONFIG_QCOM_ADSP_PIL)		+= qcom_adsp_pil.o
>  obj-$(CONFIG_QCOM_RPROC_COMMON)		+= qcom_common.o
>  obj-$(CONFIG_QCOM_Q6V5_COMMON)		+= qcom_q6v5.o
> +obj-$(CONFIG_QCOM_Q6V5_PAS)		+= qcom_q6v5_pas.o
>  obj-$(CONFIG_QCOM_Q6V5_PIL)		+= qcom_q6v5_pil.o
>  obj-$(CONFIG_QCOM_Q6V5_WCSS)		+= qcom_q6v5_wcss.o
>  obj-$(CONFIG_QCOM_SYSMON)		+= qcom_sysmon.o
> diff --git a/drivers/remoteproc/qcom_adsp_pil.c b/drivers/remoteproc/qcom_q6v5_pas.c
> similarity index 98%
> rename from drivers/remoteproc/qcom_adsp_pil.c
> rename to drivers/remoteproc/qcom_q6v5_pas.c
> index d4339a6da616..2478ef3cd519 100644
> --- a/drivers/remoteproc/qcom_adsp_pil.c
> +++ b/drivers/remoteproc/qcom_q6v5_pas.c
> @@ -364,11 +364,11 @@ static struct platform_driver adsp_driver = {
>  	.probe = adsp_probe,
>  	.remove = adsp_remove,
>  	.driver = {
> -		.name = "qcom_adsp_pil",
> +		.name = "qcom_q6v5_pas",
>  		.of_match_table = adsp_of_match,
>  	},
>  };
>  
>  module_platform_driver(adsp_driver);
> -MODULE_DESCRIPTION("Qualcomm MSM8974/MSM8996 ADSP Peripherial Image Loader");
> +MODULE_DESCRIPTION("Qualcomm Hexagon v5 Peripheral Authentication Service driver");
>  MODULE_LICENSE("GPL v2");
> -- 
> 2.18.0
>