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SubjectRe: [PATCH 09/10] soc: mediatek: change the argument of write and write_mask API
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Hi, Bibby:

On Tue, 2019-01-29 at 15:32 +0800, Bibby Hsieh wrote:
> In order to enhance the convienience of client usage,
> we change the input argument from subsys and offset to
> struct cmdq_base and dma_addr_t.
>
> Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
> ---
> drivers/soc/mediatek/mtk-cmdq-helper.c | 24 +++++++++++++++++-------
> include/linux/soc/mediatek/mtk-cmdq.h | 16 ++++++++--------
> 2 files changed, 25 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> index 923a815..34ae712 100644
> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> @@ -238,8 +238,13 @@ static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, s16 arg_c, s16 arg_b,
> return 0;
> }
>
> -int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value)
> +int cmdq_pkt_write(struct cmdq_pkt *pkt, struct cmdq_base *clt_base,
> + dma_addr_t addr, u32 value)
> {
> + const u32 base = (addr >> 32) ? 0 : addr & 0xFFFF0000;
> + u8 subsys = cmdq_subsys_base_to_id(clt_base, base);

I don't understand why this would let client more convenient? Every
time client call cmdq_pkt_write(), cmdq_subsys_base_to_id() would search
again. Why do we need such frequently search?

Regards,
CK

> + s16 offset = addr & 0x0000FFFF;
> +
> return cmdq_pkt_append_command(pkt, CMDQ_GET_ARG_C(value),
> CMDQ_GET_ARG_B(value), offset, subsys,
> CMDQ_IMMEDIATE_VALUE,
> @@ -248,21 +253,26 @@ int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value)
> }
> EXPORT_SYMBOL(cmdq_pkt_write);
>
> -int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys, u16 offset,
> - u32 value, u32 mask)
> +int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, struct cmdq_base *clt_base,
> + dma_addr_t addr, u32 value, u32 mask)
> {
> - u32 offset_mask = offset;
> + const u32 base = (addr >> 32) ? 0 : addr & 0xFFFF0000;
> + u8 subsys = cmdq_subsys_base_to_id(clt_base, base);
> + s16 offset = addr & 0x0000FFFF;
> int err = 0;
>
> if (mask != 0xffffffff) {
> err = cmdq_pkt_append_command(pkt, CMDQ_GET_ARG_C(~mask),
> CMDQ_GET_ARG_B(~mask), 0, 0, 0, 0,
> 0, CMDQ_CODE_MASK);
> - offset_mask |= CMDQ_WRITE_ENABLE_MASK;
> + offset |= CMDQ_WRITE_ENABLE_MASK;
> }
> - err |= cmdq_pkt_write(pkt, subsys, offset_mask, value);
>
> - return err;
> + return cmdq_pkt_append_command(pkt, CMDQ_GET_ARG_C(value),
> + CMDQ_GET_ARG_B(value), offset, subsys,
> + CMDQ_IMMEDIATE_VALUE,
> + CMDQ_IMMEDIATE_VALUE,
> + CMDQ_IMMEDIATE_VALUE, CMDQ_CODE_WRITE);
> }
> EXPORT_SYMBOL(cmdq_pkt_write_mask);
>
> diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
> index e4d1876..230bc2b 100644
> --- a/include/linux/soc/mediatek/mtk-cmdq.h
> +++ b/include/linux/soc/mediatek/mtk-cmdq.h
> @@ -70,26 +70,26 @@ struct cmdq_client *cmdq_mbox_create(struct device *dev, int index,
> /**
> * cmdq_pkt_write() - append write command to the CMDQ packet
> * @pkt: the CMDQ packet
> - * @subsys: the CMDQ sub system code
> - * @offset: register offset from CMDQ sub system
> + * @cmdq_base: the CMDQ sub system code and base address
> + * @addr: register address
> * @value: the specified target register value
> *
> * Return: 0 for success; else the error code is returned
> */
> -int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value);
> -
> +int cmdq_pkt_write(struct cmdq_pkt *pkt, struct cmdq_base *clt_base,
> + dma_addr_t addr, u32 value);
> /**
> * cmdq_pkt_write_mask() - append write command with mask to the CMDQ packet
> * @pkt: the CMDQ packet
> - * @subsys: the CMDQ sub system code
> - * @offset: register offset from CMDQ sub system
> + * @cmdq_base: the CMDQ sub system code and base address
> + * @addr: register address
> * @value: the specified target register value
> * @mask: the specified target register mask
> *
> * Return: 0 for success; else the error code is returned
> */
> -int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys, u16 offset,
> - u32 value, u32 mask);
> +int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, struct cmdq_base *clt_base,
> + dma_addr_t addr, u32 value, u32 mask);
>
> /**
> * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet


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