linux-kernel - Re: [PATCH 1/3] fpga: dfl: move dfl_device_id to mod

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Date:   Wed, 9 Sep 2020 05:55:33 -0700
From:   Tom Rix <trix@...hat.com>
To:     Xu Yilun <yilun.xu@...el.com>, mdf@...nel.org,
        linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org,
        masahiroy@...nel.org
Cc:     lgoncalv@...hat.com, Wu Hao <hao.wu@...el.com>,
        Matthew Gerlach <matthew.gerlach@...ux.intel.com>,
        Russ Weight <russell.h.weight@...el.com>
Subject: Re: [PATCH 1/3] fpga: dfl: move dfl_device_id to mod_devicetable.h


On 9/7/20 10:48 PM, Xu Yilun wrote:
> In order to support MODULE_DEVICE_TABLE() for dfl device driver, this
> patch moves struct dfl_device_id to mod_devicetable.h
>
> Signed-off-by: Xu Yilun <yilun.xu@...el.com>
> Signed-off-by: Wu Hao <hao.wu@...el.com>
> Signed-off-by: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
> Signed-off-by: Russ Weight <russell.h.weight@...el.com>
> ---
>  drivers/fpga/dfl.h              | 13 +------------
>  include/linux/mod_devicetable.h | 12 ++++++++++++
>  2 files changed, 13 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h
> index 5dc758f..d5b0760 100644
> --- a/drivers/fpga/dfl.h
> +++ b/drivers/fpga/dfl.h
> @@ -26,6 +26,7 @@
>  #include <linux/slab.h>
>  #include <linux/uuid.h>
>  #include <linux/fpga/fpga-region.h>
> +#include <linux/mod_devicetable.h>
>  
>  /* maximum supported number of ports */
>  #define MAX_DFL_FPGA_PORT_NUM 4
> @@ -526,18 +527,6 @@ enum dfl_id_type {
>  };
>  
>  /**
> - * struct dfl_device_id -  dfl device identifier
> - * @type: contains 4 bits DFL FIU type of the device. See enum dfl_id_type.
> - * @feature_id: contains 12 bits feature identifier local to its DFL FIU type.
> - * @driver_data: driver specific data.
> - */
> -struct dfl_device_id {
> -	u8 type;
> -	u16 feature_id;
> -	unsigned long driver_data;
> -};
> -
> -/**
>   * struct dfl_device - represent an dfl device on dfl bus
>   *
>   * @dev: generic device interface.
> diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
> index 5b08a47..407d8dc 100644
> --- a/include/linux/mod_devicetable.h
> +++ b/include/linux/mod_devicetable.h
> @@ -838,4 +838,16 @@ struct mhi_device_id {
>  	kernel_ulong_t driver_data;
>  };
>  
> +/**
> + * struct dfl_device_id -  dfl device identifier
> + * @type: contains 4 bits DFL FIU type of the device. See enum dfl_id_type.
> + * @feature_id: contains 12 bits feature identifier local to its DFL FIU type.
> + * @driver_data: driver specific data.
> + */
> +struct dfl_device_id {
> +	__u8 type;
> +	__u16 feature_id;

I thought i saw feature id's going to 64 bit, does this type need to expand ?

Tom 

> +	kernel_ulong_t driver_data;
> +};
> +
>  #endif /* LINUX_MOD_DEVICETABLE_H */