linux-kernel - Re: [PATCH] firmware: ti_sci: rm: Add support for tx

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Date:   Fri, 1 Nov 2019 10:23:26 +0200
From:   Tero Kristo <t-kristo@...com>
To:     Peter Ujfalusi <peter.ujfalusi@...com>, <nm@...com>,
        <ssantosh@...nel.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <grygorii.strashko@...com>
Subject: Re: [PATCH] firmware: ti_sci: rm: Add support for tx_tdtype parameter
 for tx channel

On 25/10/2019 11:47, Peter Ujfalusi wrote:
> The system controller's resource manager have support for configuring the
> TDTYPE of TCHAN_CFG register on j721e.
> With this parameter the teardown completion can be controlled:
> TDTYPE == 0: Return without waiting for peer to complete the teardown
> TDTYPE == 1: Wait for peer to complete the teardown
> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>

Reviewed-by: Tero Kristo <t-kristo@...com>

> ---
> Hi,
> 
> I know it is kind of getting late for 5.5, but can you consider this small
> addition so I can add the support for it in the initial DMA driver?
> 
> Thanks and regards,
> Peter
> 
>   drivers/firmware/ti_sci.c              | 1 +
>   drivers/firmware/ti_sci.h              | 7 +++++++
>   include/linux/soc/ti/ti_sci_protocol.h | 2 ++
>   3 files changed, 10 insertions(+)
> 
> diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
> index 4126be9e3216..f13e4a96f3b7 100644
> --- a/drivers/firmware/ti_sci.c
> +++ b/drivers/firmware/ti_sci.c
> @@ -2412,6 +2412,7 @@ static int ti_sci_cmd_rm_udmap_tx_ch_cfg(const struct ti_sci_handle *handle,
>   	req->fdepth = params->fdepth;
>   	req->tx_sched_priority = params->tx_sched_priority;
>   	req->tx_burst_size = params->tx_burst_size;
> +	req->tx_tdtype = params->tx_tdtype;
>   
>   	ret = ti_sci_do_xfer(info, xfer);
>   	if (ret) {
> diff --git a/drivers/firmware/ti_sci.h b/drivers/firmware/ti_sci.h
> index f0d068c03944..255327171dae 100644
> --- a/drivers/firmware/ti_sci.h
> +++ b/drivers/firmware/ti_sci.h
> @@ -910,6 +910,7 @@ struct rm_ti_sci_msg_udmap_rx_flow_opt_cfg {
>    *   12 - Valid bit for @ref ti_sci_msg_rm_udmap_tx_ch_cfg::tx_credit_count
>    *   13 - Valid bit for @ref ti_sci_msg_rm_udmap_tx_ch_cfg::fdepth
>    *   14 - Valid bit for @ref ti_sci_msg_rm_udmap_tx_ch_cfg::tx_burst_size
> + *   15 - Valid bit for @ref ti_sci_msg_rm_udmap_tx_ch_cfg::tx_tdtype
>    *
>    * @nav_id: SoC device ID of Navigator Subsystem where tx channel is located
>    *
> @@ -973,6 +974,11 @@ struct rm_ti_sci_msg_udmap_rx_flow_opt_cfg {
>    *
>    * @tx_burst_size: UDMAP transmit channel burst size configuration to be
>    * programmed into the tx_burst_size field of the TCHAN_TCFG register.
> + *
> + * @tx_tdtype: UDMAP transmit channel teardown type configuration to be
> + * programmed into the tdtype field of the TCHAN_TCFG register:
> + * 0 - Return immediately
> + * 1 - Wait for completion message from remote peer
>    */
>   struct ti_sci_msg_rm_udmap_tx_ch_cfg_req {
>   	struct ti_sci_msg_hdr hdr;
> @@ -994,6 +1000,7 @@ struct ti_sci_msg_rm_udmap_tx_ch_cfg_req {
>   	u16 fdepth;
>   	u8 tx_sched_priority;
>   	u8 tx_burst_size;
> +	u8 tx_tdtype;
>   } __packed;
>   
>   /**
> diff --git a/include/linux/soc/ti/ti_sci_protocol.h b/include/linux/soc/ti/ti_sci_protocol.h
> index 9531ec823298..f3aed0b91564 100644
> --- a/include/linux/soc/ti/ti_sci_protocol.h
> +++ b/include/linux/soc/ti/ti_sci_protocol.h
> @@ -342,6 +342,7 @@ struct ti_sci_msg_rm_udmap_tx_ch_cfg {
>   #define TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_SUPR_TDPKT_VALID        BIT(11)
>   #define TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_CREDIT_COUNT_VALID      BIT(12)
>   #define TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_FDEPTH_VALID            BIT(13)
> +#define TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_TDTYPE_VALID            BIT(15)
>   	u16 nav_id;
>   	u16 index;
>   	u8 tx_pause_on_err;
> @@ -359,6 +360,7 @@ struct ti_sci_msg_rm_udmap_tx_ch_cfg {
>   	u16 fdepth;
>   	u8 tx_sched_priority;
>   	u8 tx_burst_size;
> +	u8 tx_tdtype;
>   };
>   
>   /**
> 

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