From: Matthias Brugger <matthias.bgg@gmail.com>
To: Bibby Hsieh <bibby.hsieh@mediatek.com>
Cc: devicetree@vger.kernel.org,
Nicolas Boichat <drinkcat@chromium.org>,
Philipp Zabel <p.zabel@pengutronix.de>,
srv_heupstream@mediatek.com,
Daoyuan Huang <daoyuan.huang@mediatek.com>,
Sascha Hauer <s.hauer@pengutronix.de>,
Jassi Brar <jassisinghbrar@gmail.com>,
linux-kernel@vger.kernel.org, Daniel Kurtz <djkurtz@chromium.org>,
Dennis-YC Hsieh <dennis-yc.hsieh@mediatek.com>,
YT Shen <yt.shen@mediatek.com>, Rob Herring <robh+dt@kernel.org>,
linux-mediatek@lists.infradead.org,
Houlong Wei <houlong.wei@mediatek.com>,
Sascha Hauer <kernel@pengutronix.de>, CK HU <ck.hu@mediatek.com>,
Jiaguang Zhang <jiaguang.zhang@mediatek.com>,
linux-arm-kernel@lists.infradead.org, ginny.chen@mediatek.com
Subject: Re: [RESEND, PATCH v13 11/12] soc: mediatek: cmdq: add cmdq_dev_get_client_reg function
Date: Tue, 27 Aug 2019 12:13:56 +0200 [thread overview]
Message-ID: <f8945f1b-aaa7-4f4a-59e5-8e817aeb46ae@gmail.com> (raw)
In-Reply-To: <1566878368.29523.1.camel@mtksdaap41>
On 27/08/2019 05:59, Bibby Hsieh wrote:
> On Fri, 2019-08-23 at 16:21 +0200, Matthias Brugger wrote:
>>
>> On 20/08/2019 10:49, Bibby Hsieh wrote:
>>> GCE cannot know the register base address, this function
>>> can help cmdq client to get the cmdq_client_reg structure.
>>>
>>> Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
>>> Reviewed-by: CK Hu <ck.hu@mediatek.com>
>>> ---
>>> drivers/soc/mediatek/mtk-cmdq-helper.c | 29 ++++++++++++++++++++++++++
>>> include/linux/soc/mediatek/mtk-cmdq.h | 21 +++++++++++++++++++
>>> 2 files changed, 50 insertions(+)
>>>
>>> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
>>> index c53f8476c68d..80f75a1075b4 100644
>>> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
>>> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
>>> @@ -27,6 +27,35 @@ struct cmdq_instruction {
>>> u8 op;
>>> };
>>>
>>> +int cmdq_dev_get_client_reg(struct device *dev,
>>> + struct cmdq_client_reg *client_reg, int idx)
>>> +{
>>
>> Can't we do/call this in cmdq_mbox_create parsing the number of gce-client-reg
>> properties we have and allocating these using a pointer to cmdq_client_reg in
>> cmdq_client?
>> We will have to free the pointer then in cmdq_mbox_destroy.
>>
>> Regards,
>> Matthias
>
> I don't think we need to keep the cmdq_client_reg in cmdq_client
> structure.
> Because our client will have own data structure, they will copy the
> client_reg information into their own structure.
>
> In the design now, we do not allocate the cmdq_client_reg, client pass
> the cmdq_client_reg pointer into this API.
> Client will destroy the pointer after they get the information they
> want.
>
My point wasn't so much about the lifecycle of the object, but the fact that we
add another call, which can be already full-filled by a necessary previous call
to cmdq_mbox_create. So I would prefer to add the information gathering for
cmdq_client_reg in this call, and let it live there for the time cmdq_client
lives. In the end we are talking about 40 bits of memory.
Regards,
Matthias
> Thanks for the comments so much.
>
> Bibby
>
>>
>>> + struct of_phandle_args spec;
>>> + int err;
>>> +
>>> + if (!client_reg)
>>> + return -ENOENT;
>>> +
>>> + err = of_parse_phandle_with_fixed_args(dev->of_node,
>>> + "mediatek,gce-client-reg",
>>> + 3, idx, &spec);
>>> + if (err < 0) {
>>> + dev_err(dev,
>>> + "error %d can't parse gce-client-reg property (%d)",
>>> + err, idx);
>>> +
>>> + return err;
>>> + }
>>> +
>>> + client_reg->subsys = (u8)spec.args[0];
>>> + client_reg->offset = (u16)spec.args[1];
>>> + client_reg->size = (u16)spec.args[2];
>>> + of_node_put(spec.np);
>>> +
>>> + return 0;
>>> +}
>>> +EXPORT_SYMBOL(cmdq_dev_get_client_reg);
>>> +
>>> static void cmdq_client_timeout(struct timer_list *t)
>>> {
>>> struct cmdq_client *client = from_timer(client, t, timer);
>>> diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
>>> index a345870a6d10..02ddd60b212f 100644
>>> --- a/include/linux/soc/mediatek/mtk-cmdq.h
>>> +++ b/include/linux/soc/mediatek/mtk-cmdq.h
>>> @@ -15,6 +15,12 @@
>>>
>>> struct cmdq_pkt;
>>>
>>> +struct cmdq_client_reg {
>>> + u8 subsys;
>>> + u16 offset;
>>> + u16 size;
>>> +};
>>> +
>>> struct cmdq_client {
>>> spinlock_t lock;
>>> u32 pkt_cnt;
>>> @@ -24,6 +30,21 @@ struct cmdq_client {
>>> u32 timeout_ms; /* in unit of microsecond */
>>> };
>>>
>>> +/**
>>> + * cmdq_dev_get_client_reg() - parse cmdq client reg from the device
>>> + * node of CMDQ client
>>> + * @dev: device of CMDQ mailbox client
>>> + * @client_reg: CMDQ client reg pointer
>>> + * @idx: the index of desired reg
>>> + *
>>> + * Return: 0 for success; else the error code is returned
>>> + *
>>> + * Help CMDQ client parsing the cmdq client reg
>>> + * from the device node of CMDQ client.
>>> + */
>>> +int cmdq_dev_get_client_reg(struct device *dev,
>>> + struct cmdq_client_reg *client_reg, int idx);
>>> +
>>> /**
>>> * cmdq_mbox_create() - create CMDQ mailbox client and channel
>>> * @dev: device of CMDQ mailbox client
>>>
>
>
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next prev parent reply other threads:[~2019-08-27 10:14 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-20 8:49 [RESEND, PATCH v13 00/12] support gce on mt8183 platform Bibby Hsieh
2019-08-20 8:49 ` [RESEND, PATCH v13 01/12] dt-binding: gce: remove thread-num property Bibby Hsieh
2019-08-20 8:49 ` [RESEND, PATCH v13 02/12] dt-binding: gce: add gce header file for mt8183 Bibby Hsieh
2019-08-20 8:49 ` [RESEND, PATCH v13 03/12] dt-binding: gce: add binding for gce client reg property Bibby Hsieh
2019-08-20 8:49 ` [RESEND, PATCH v13 04/12] mailbox: mediatek: cmdq: move the CMDQ_IRQ_MASK into cmdq driver data Bibby Hsieh
2019-08-23 11:32 ` Matthias Brugger
2019-08-20 8:49 ` [RESEND, PATCH v13 05/12] mailbox: mediatek: cmdq: support mt8183 gce function Bibby Hsieh
2019-08-20 8:49 ` [RESEND, PATCH v13 06/12] soc: mediatek: cmdq: clear the event in cmdq initial flow Bibby Hsieh
2019-08-23 11:36 ` Matthias Brugger
2019-08-23 11:43 ` Matthias Brugger
2019-08-20 8:49 ` [RESEND, PATCH v13 07/12] soc: mediatek: cmdq: reorder the parameter Bibby Hsieh
2019-08-23 12:05 ` Matthias Brugger
2019-08-20 8:49 ` [RESEND, PATCH v13 08/12] soc: mediatek: cmdq: change the type of input parameter Bibby Hsieh
2019-08-23 12:09 ` Matthias Brugger
2019-08-20 8:49 ` [RESEND, PATCH v13 09/12] soc: mediatek: cmdq: define the instruction struct Bibby Hsieh
2019-08-20 9:39 ` houlong wei
2019-08-23 13:50 ` Matthias Brugger
2019-08-27 4:12 ` Bibby Hsieh
2019-08-27 10:04 ` Matthias Brugger
2019-08-20 8:49 ` [RESEND, PATCH v13 10/12] soc: mediatek: cmdq: add polling function Bibby Hsieh
2019-08-20 9:50 ` houlong wei
2019-08-23 14:05 ` Matthias Brugger
2019-08-27 4:07 ` Bibby Hsieh
2019-08-20 8:49 ` [RESEND, PATCH v13 11/12] soc: mediatek: cmdq: add cmdq_dev_get_client_reg function Bibby Hsieh
2019-08-20 9:40 ` houlong wei
2019-08-20 9:47 ` houlong wei
2019-08-23 14:21 ` Matthias Brugger
2019-08-27 3:59 ` Bibby Hsieh
2019-08-27 10:13 ` Matthias Brugger [this message]
2019-08-28 8:32 ` Bibby Hsieh
2019-08-20 8:49 ` [RESEND, PATCH v13 12/12] arm64: dts: add gce node for mt8183 Bibby Hsieh
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