From: Sudeep Holla <sudeep.holla@arm.com>
To: Huisong Li <lihuisong@huawei.com>
Cc: robbiek@xsightlabs.com, linux-acpi@vger.kernel.org,
Sudeep Holla <sudeep.holla@arm.com>,
linux-kernel@vger.kernel.org, rafael@kernel.org,
rafael.j.wysocki@intel.com, wanghuiqiang@huawei.com,
zhangzekun11@huawei.com, wangxiongfeng2@huawei.com,
tanxiaofei@huawei.com, guohanjun@huawei.com, xiexiuqi@huawei.com,
wangkefeng.wang@huawei.com, huangdaode@huawei.com
Subject: Re: [PATCH v2 1/2] mailbox: pcc: Add support for platform notification handling
Date: Mon, 27 Mar 2023 12:30:57 +0100 [thread overview]
Message-ID: <20230327113057.cc2ufila5z25mgic@bogus> (raw)
In-Reply-To: <20230314111135.16520-2-lihuisong@huawei.com>
On Tue, Mar 14, 2023 at 07:11:34PM +0800, Huisong Li wrote:
> Currently, PCC driver doesn't support the processing of platform
> notification for type 4 PCC subspaces.
>
> According to ACPI specification, if platform sends a notification
> to OSPM, it must clear the command complete bit and trigger platform
> interrupt. OSPM needs to check whether the command complete bit is
> cleared, clear platform interrupt, process command, and then set the
> command complete and ring doorbell to the Platform.
>
> Let us stash the value of the pcc type and use the same while processing
> the interrupt of the channel. We also need to set the command complete
> bit and ring doorbell in the interrupt handler for the type 4 channel to
> complete the communication flow after processing the notification from
> the Platform.
>
> Signed-off-by: Huisong Li <lihuisong@huawei.com>
> ---
> drivers/mailbox/pcc.c | 50 +++++++++++++++++++++++++++++++++++--------
> 1 file changed, 41 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c
> index 105d46c9801b..a0a87c480d8b 100644
> --- a/drivers/mailbox/pcc.c
> +++ b/drivers/mailbox/pcc.c
> @@ -91,6 +91,7 @@ struct pcc_chan_reg {
> * @cmd_update: PCC register bundle for the command complete update register
> * @error: PCC register bundle for the error status register
> * @plat_irq: platform interrupt
> + * @type: PCC subspace type
> */
> struct pcc_chan_info {
> struct pcc_mbox_chan chan;
> @@ -100,12 +101,15 @@ struct pcc_chan_info {
> struct pcc_chan_reg cmd_update;
> struct pcc_chan_reg error;
> int plat_irq;
> + u8 type;
> };
>
> #define to_pcc_chan_info(c) container_of(c, struct pcc_chan_info, chan)
> static struct pcc_chan_info *chan_info;
> static int pcc_chan_count;
>
> +static int pcc_send_data(struct mbox_chan *chan, void *data);
> +
> /*
> * PCC can be used with perf critical drivers such as CPPC
> * So it makes sense to locally cache the virtual address and
> @@ -221,6 +225,34 @@ static int pcc_map_interrupt(u32 interrupt, u32 flags)
> return acpi_register_gsi(NULL, interrupt, trigger, polarity);
> }
>
> +static bool pcc_mbox_cmd_complete_check(struct pcc_chan_info *pchan)
> +{
> + u64 val;
> + int ret;
> +
> + ret = pcc_chan_reg_read(&pchan->cmd_complete, &val);
> + if (ret)
> + return false;
> +
> + if (!pchan->cmd_complete.gas)
> + return true;
> +
> + /*
> + * Judge if the channel respond the interrupt based on the value of
> + * command complete.
> + */
> + val &= pchan->cmd_complete.status_mask;
[super nit] Would prefer an blank line here.
--
Regards,
Sudeep
next prev parent reply other threads:[~2023-03-27 11:31 UTC|newest]
Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-16 3:40 [RFC] ACPI: PCC: Support shared interrupt for multiple subspaces Huisong Li
2022-10-26 6:10 ` lihuisong (C)
2022-10-27 11:10 ` Sudeep Holla
2022-10-27 12:48 ` lihuisong (C)
2022-10-27 15:53 ` Sudeep Holla
2022-10-28 7:55 ` lihuisong (C)
2022-10-31 10:40 ` Sudeep Holla
2022-11-01 2:49 ` lihuisong (C)
2022-11-04 15:04 ` Robbie King
2022-11-04 15:15 ` Sudeep Holla
2022-11-04 15:39 ` Robbie King
2022-11-07 6:24 ` lihuisong (C)
2022-11-17 18:09 ` Robbie King
2022-11-19 7:32 ` lihuisong (C)
2022-11-21 16:59 ` Robbie King
2022-11-22 3:42 ` lihuisong (C)
2022-11-22 3:30 ` [RFC V2] " Huisong Li
2022-11-22 13:46 ` Sudeep Holla
2022-11-23 3:36 ` lihuisong (C)
2022-12-03 9:51 ` [RFC-V3 0/2] mailbox: pcc: Support platform notification for type4 and shared interrupt Huisong Li
2022-12-03 9:51 ` [RFC-V3 1/2] mailbox: pcc: Add processing platform notification for slave subspaces Huisong Li
2023-02-06 15:39 ` Sudeep Holla
2023-02-07 2:27 ` lihuisong (C)
2023-02-13 21:18 ` Robbie King
2023-02-14 1:24 ` lihuisong (C)
2022-12-03 9:51 ` [RFC-V3 2/2] mailbox: pcc: Support shared interrupt for multiple subspaces Huisong Li
2022-12-14 2:57 ` [RFC-V3 0/2] mailbox: pcc: Support platform notification for type4 and shared interrupt lihuisong (C)
2022-12-30 1:07 ` lihuisong (C)
2023-01-04 11:06 ` Sudeep Holla
2023-01-05 1:14 ` lihuisong (C)
2023-01-28 1:49 ` lihuisong (C)
2023-02-16 6:36 ` [PATCH " Huisong Li
2023-02-16 6:36 ` [PATCH 1/2] mailbox: pcc: Add processing platform notification for slave subspaces Huisong Li
2023-03-01 13:24 ` Sudeep Holla
2023-03-02 1:57 ` lihuisong (C)
2023-03-02 13:52 ` Sudeep Holla
2023-03-03 1:50 ` lihuisong (C)
2023-03-03 11:07 ` Sudeep Holla
2023-03-04 9:49 ` lihuisong (C)
2023-02-16 6:36 ` [PATCH 2/2] mailbox: pcc: Support shared interrupt for multiple subspaces Huisong Li
2023-03-01 13:36 ` Sudeep Holla
2023-03-02 2:17 ` lihuisong (C)
2023-03-02 14:02 ` Sudeep Holla
[not found] ` <020cc964-9938-7ebe-7514-125cd041bfcb@huawei.com>
2023-03-03 11:14 ` Sudeep Holla
2023-03-04 9:47 ` lihuisong (C)
2023-03-10 20:14 ` Sudeep Holla
2023-03-14 1:05 ` lihuisong (C)
2023-02-27 13:09 ` [PATCH 0/2] mailbox: pcc: Support platform notification for type4 and shared interrupt lihuisong (C)
2023-03-14 11:11 ` [PATCH v2 " Huisong Li
2023-03-14 11:11 ` [PATCH v2 1/2] mailbox: pcc: Add support for platform notification handling Huisong Li
2023-03-27 11:30 ` Sudeep Holla [this message]
2023-03-27 12:25 ` lihuisong (C)
2023-03-27 13:27 ` Sudeep Holla
2023-03-14 11:11 ` [PATCH v2 2/2] mailbox: pcc: Support shared interrupt for multiple subspaces Huisong Li
2023-03-24 2:30 ` [PATCH v2 0/2] mailbox: pcc: Support platform notification for type4 and shared interrupt lihuisong (C)
2023-03-27 11:33 ` Sudeep Holla
2023-03-27 12:31 ` lihuisong (C)
2023-04-10 1:26 ` lihuisong (C)
2023-04-11 14:47 ` Robbie King
2023-04-14 1:05 ` lihuisong (C)
2023-04-14 13:48 ` Robbie King
2023-04-18 2:21 ` lihuisong (C)
2023-04-21 10:55 ` Sudeep Holla
2023-04-23 3:58 ` lihuisong (C)
2023-04-25 13:22 ` lihuisong (C)
2023-04-23 11:03 ` [PATCH v3 " Huisong Li
2023-04-23 11:03 ` [PATCH v3 1/2] mailbox: pcc: Add support for platform notification handling Huisong Li
2023-04-23 11:03 ` [PATCH v3 2/2] mailbox: pcc: Support shared interrupt for multiple subspaces Huisong Li
2023-04-25 14:41 ` [PATCH v3 0/2] mailbox: pcc: Support platform notification for type4 and shared interrupt Sudeep Holla
2023-05-25 12:25 ` lihuisong (C)
2023-05-04 1:30 ` lihuisong (C)
2023-05-09 9:06 ` Sudeep Holla
2023-06-13 12:57 ` [PATCH v4 " Huisong Li
2023-06-13 12:57 ` [PATCH v4 1/2] mailbox: pcc: Add support for platform notification handling Huisong Li
2023-06-13 12:57 ` [PATCH v4 2/2] mailbox: pcc: Support shared interrupt for multiple subspaces Huisong Li
2023-06-14 15:58 ` [PATCH v4 0/2] mailbox: pcc: Support platform notification for type4 and shared interrupt Sudeep Holla
2023-07-14 6:39 ` lihuisong (C)
2023-07-21 12:31 ` lihuisong (C)
2023-06-15 1:58 ` Hanjun Guo
2023-08-01 6:38 ` [PATCH RESEND " Huisong Li
2023-08-01 6:38 ` [PATCH RESEND v4 1/2] mailbox: pcc: Add support for platform notification handling Huisong Li
2023-08-01 6:38 ` [PATCH RESEND v4 2/2] mailbox: pcc: Support shared interrupt for multiple subspaces Huisong Li
2023-08-01 9:38 ` [PATCH RESEND v4 0/2] mailbox: pcc: Support platform notification for type4 and shared interrupt Sudeep Holla
2023-08-09 11:44 ` lihuisong (C)
2023-08-17 6:50 ` lihuisong (C)
2023-08-26 2:40 ` lihuisong (C)
[not found] ` <AS8P193MB233566815E722D9B3B13B5EECAE2A@AS8P193MB2335.EURP193.PROD.OUTLOOK.COM>
2023-08-28 1:03 ` lihuisong (C)
2023-08-29 9:55 ` Sudeep Holla
2023-09-21 13:52 ` Sudeep Holla
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