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Subject: Re: [PATCH] firmware: ti_sci: rm: Add support for tx_tdtype parameter
 for tx channel
To:     Tero Kristo <t-kristo@ti.com>, <nm@ti.com>, <ssantosh@kernel.org>
CC:     <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <grygorii.strashko@ti.com>,
        Vinod <vkoul@kernel.org>
References: <20191025084715.25098-1-peter.ujfalusi@ti.com>
 <b2231065-ae16-8870-03ac-a435f190ee9f@ti.com>
From:   Peter Ujfalusi <peter.ujfalusi@ti.com>
Message-ID: <31bce7ea-1769-c299-03a6-60c5b699fd7f@ti.com>
Date:   Wed, 13 Nov 2019 08:48:04 +0200
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Thanks Tero,

On 01/11/2019 10.23, Tero Kristo wrote:
> 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@ti.com>
> 
> Reviewed-by: Tero Kristo <t-kristo@ti.com>

I'll take this patch as part of the upcoming v6 of the k3 DMA support
series to make sure it is buildable unless someone will pick this for
5.5-rc1.

- Péter

> 
>> ---
>> 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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