From: Florian Fainelli <f.fainelli@gmail.com>
To: Cristian Marussi <cristian.marussi@arm.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com,
Jonathan.Cameron@Huawei.com, etienne.carriere@linaro.org,
vincent.guittot@linaro.org, souvik.chakravarty@arm.com
Subject: Re: [PATCH v4 02/12] firmware: arm_scmi: Add configurable polling mode for transports
Date: Wed, 25 Aug 2021 18:29:31 +0200 [thread overview]
Message-ID: <3be84c2b-bb86-65c4-4c32-957767ffa577@gmail.com> (raw)
In-Reply-To: <20210824135941.38656-3-cristian.marussi@arm.com>
On 8/24/2021 3:59 PM, Cristian Marussi wrote:
> SCMI communications along TX channels can optionally be provided of a
> completion interrupt; when such interrupt is not available, command
> transactions should rely on polling, where the SCMI core takes care to
> repeatedly evaluate the transport-specific .poll_done() function to
> determine if and when a request was fully completed or timed out.
>
> Such mechanism is already present and working on a single transfer base:
> SCMI protocols can indeed enable hdr.poll_completion on specific commands
> ahead of each transfer and cause that transaction to be handled with
> polling.
>
> Introduce a couple of flags to be able to enforce such polling behaviour
> globally at will:
>
> - scmi_desc.force_polling: to statically switch the whole transport to
> polling mode.
>
> - scmi_chan_info.no_completion_irq: to switch a single channel dynamically
> to polling mode if at runtime is determined that no completion interrupt
> was available for such channel.
>
> Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
--
Florian
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next prev parent reply other threads:[~2021-08-25 16:53 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-24 13:59 [PATCH v4 0/12] Introduce atomic support for SCMI transports Cristian Marussi
2021-08-24 13:59 ` [PATCH v4 01/12] firmware: arm_scmi: Perform earlier cinfo lookup call in do_xfer Cristian Marussi
2021-08-25 16:28 ` Florian Fainelli
2021-08-24 13:59 ` [PATCH v4 02/12] firmware: arm_scmi: Add configurable polling mode for transports Cristian Marussi
2021-08-25 16:29 ` Florian Fainelli [this message]
2021-08-24 13:59 ` [PATCH v4 03/12] firmware: arm_scmi: Add support for atomic transports Cristian Marussi
2021-08-25 16:18 ` Jim Quinlan
2021-08-25 17:50 ` Cristian Marussi
2021-08-24 13:59 ` [PATCH v4 04/12] include: trace: Add new scmi_xfer_response_wait event Cristian Marussi
2021-08-25 16:30 ` Florian Fainelli
2021-08-24 13:59 ` [PATCH v4 05/12] firmware: arm_scmi: Use new trace event scmi_xfer_response_wait Cristian Marussi
2021-08-25 16:31 ` Florian Fainelli
2021-08-25 17:52 ` Cristian Marussi
2021-08-24 13:59 ` [PATCH v4 06/12] firmware: arm_scmi: Add is_transport_atomic() handle method Cristian Marussi
2021-08-25 16:32 ` Florian Fainelli
2021-08-24 13:59 ` [PATCH v4 07/12] clk: scmi: Support atomic enable/disable API Cristian Marussi
2021-08-25 16:33 ` Florian Fainelli
2021-08-24 13:59 ` [PATCH v4 08/12] firmware: arm_scmi: Declare virtio transport .atomic_capable Cristian Marussi
2021-08-24 13:59 ` [PATCH v4 09/12] [RFC] firmware: arm_scmi: Make smc transport use common completions Cristian Marussi
2021-08-25 16:35 ` Florian Fainelli
2021-08-24 13:59 ` [PATCH v4 10/12] [RFC] firmware: arm_scmi: Make smc transport atomic Cristian Marussi
2021-08-24 13:59 ` [PATCH v4 11/12] [RFC] firmware: arm_scmi: Add sync_cmds_atomic_replies transport flag Cristian Marussi
2021-08-25 16:38 ` Florian Fainelli
2021-08-25 17:17 ` Jim Quinlan
2021-08-25 18:49 ` Cristian Marussi
2021-08-26 18:29 ` Jim Quinlan
2021-08-31 5:56 ` Cristian Marussi
2021-09-23 15:03 ` Cristian Marussi
2021-10-04 17:50 ` Jim Quinlan
2021-10-04 18:00 ` Cristian Marussi
2021-08-24 13:59 ` [PATCH v4 12/12] [RFC] firmware: arm_scmi: Make smc support atomic commands replies Cristian Marussi
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