Re: [PATCH v6 4/5] remoteproc: ingenic: Added remoteproc driver

Bjorn Andersson
2020-04-20T06:37:17Z

On Fri 17 Apr 10:00 PDT 2020, Paul Cercueil wrote:

> This driver is used to boot, communicate with and load firmwares to the
> MIPS co-processor found in the VPU hardware of the JZ47xx SoCs from
> Ingenic.
>
> Signed-off-by: Paul Cercueil <paul@crapouillou.net>
> Signed-off-by: kbuild test robot <lkp@intel.com>
> Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>

Please read Documentation/process/submitting-patches.rst about
"Developer's Certificate of Origin".

I suspect that you incorporated review feedback on previous revisions
from kbuild and Julia, this is generally omitted from the actual commit
message.

> Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
> ---
>
> Notes:
> v2: Remove exception for always-mapped memories
> v3: - Use clk_bulk API
> - Move device-managed code to its own patch [3/4]
> - Move devicetree table right above ingenic_rproc_driver
> - Removed #ifdef CONFIG_OF around devicetree table
> - Removed .owner = THIS_MODULE in ingenic_rproc_driver
> - Removed useless platform_set_drvdata()
> v4: - Add fix reported by Julia
> - Change Kconfig symbol to INGENIC_VPU_RPROC
> - Add documentation to struct vpu
> - disable_irq_nosync() -> disable_irq()
> v5: No change
> v6: Instead of prepare/unprepare callbacks, use PM runtime callbacks
>
> drivers/remoteproc/Kconfig | 8 +
> drivers/remoteproc/Makefile | 1 +
> drivers/remoteproc/ingenic_rproc.c | 282 +++++++++++++++++++++++++++++
> 3 files changed, 291 insertions(+)
> create mode 100644 drivers/remoteproc/ingenic_rproc.c
>
> diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
> index fbaed079b299..31da3e6c6281 100644
> --- a/drivers/remoteproc/Kconfig
> +++ b/drivers/remoteproc/Kconfig
> @@ -240,6 +240,14 @@ config STM32_RPROC
>
> This can be either built-in or a loadable module.
>
> +config INGENIC_VPU_RPROC

Please try to keep things alphabetically ordered.

> + tristate "Ingenic JZ47xx VPU remoteproc support"
> + depends on MIPS || COMPILE_TEST
> + help
> + Say y or m here to support the VPU in the JZ47xx SoCs from Ingenic.
> + This can be either built-in or a loadable module.
> + If unsure say N.
> +
> endif # REMOTEPROC
>
> endmenu
[..]
> diff --git a/drivers/remoteproc/ingenic_rproc.c b/drivers/remoteproc/ingenic_rproc.c
[..]
> +/**
> + * struct vpu - Ingenic VPU remoteproc private structure
> + * @irq: interrupt number
> + * @clks: pointers to the VPU and AUX clocks

aux_base is missing

> + * @mem_info: array of struct vpu_mem_info, which contain the mapping info of
> + * each of the external memories
> + * @dev: private pointer to the device
> + */
> +struct vpu {
> + int irq;
> + struct clk_bulk_data clks[2];
> + void __iomem *aux_base;
> + struct vpu_mem_info mem_info[ARRAY_SIZE(vpu_mem_map)];
> + struct device *dev;
> +};
[..]
> +static void *ingenic_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
> +{
> + struct vpu *vpu = rproc->priv;
> + void __iomem *va = NULL;
> + unsigned int i;
> +
> + if (len <= 0)

len can't be negative (also, does it add value to check for and fail len
== 0?)

> + return NULL;
> +
> + for (i = 0; i < ARRAY_SIZE(vpu_mem_map); i++) {
> + const struct vpu_mem_info *info = &vpu->mem_info[i];
> + const struct vpu_mem_map *map = info->map;
> +
> + if (da >= map->da && (da + len) < (map->da + info->len)) {
> + va = info->base + (da - map->da);
> + break;
> + }
> + }
> +
> + return (__force void *)va;
> +}
[..]
> +static struct platform_driver ingenic_rproc_driver = {
> + .probe = ingenic_rproc_probe,
> + .driver = {
> + .name = "ingenic-vpu",
> +#ifdef CONFIG_PM

Please omit the #ifdef here.

> + .pm = &ingenic_rproc_pm,
> +#endif
> + .of_match_table = of_match_ptr(ingenic_rproc_of_matches),

Please omit the of_match_ptr()

Regards,
Bjorn

> + },
> +};
> +module_platform_driver(ingenic_rproc_driver);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
> +MODULE_DESCRIPTION("Ingenic JZ47xx Remote Processor control driver");
> --
> 2.25.1
>