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Message-ID: <CAJZ5v0ixFvJ6akSMZmcUsg1n_kufq_WonWhS+ef=ps1FXKqUGQ@mail.gmail.com>
Date: Mon, 27 Mar 2023 19:06:36 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Cristian Marussi <cristian.marussi@....com>
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-pm@...r.kernel.org, sudeep.holla@....com,
james.quinlan@...adcom.com, Jonathan.Cameron@...wei.com,
f.fainelli@...il.com, vincent.guittot@...aro.org,
tarek.el-sherbiny@....com, nicola.mazzucato@....com,
souvik.chakravarty@....com, wleavitt@...vell.com,
wbartczak@...vell.com
Subject: Re: [PATCH v2 1/3] firmware: arm_scmi: Refactor powercap get/set helpers
On Thu, Mar 9, 2023 at 3:09 PM Cristian Marussi
<cristian.marussi@....com> wrote:
>
> Refactor SCMI powercap internal get/set helpers.
>
> Signed-off-by: Cristian Marussi <cristian.marussi@....com>
I can apply this series if I get an ACK or preferably Reviewed-by:
from an SCMI person.
However, I think that it would be more appropriate to route it through
ARM/ARM64 anyway.
> ---
> drivers/firmware/arm_scmi/powercap.c | 65 +++++++++++++++++++---------
> 1 file changed, 45 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/firmware/arm_scmi/powercap.c b/drivers/firmware/arm_scmi/powercap.c
> index 83b90bde755c..2e490492f187 100644
> --- a/drivers/firmware/arm_scmi/powercap.c
> +++ b/drivers/firmware/arm_scmi/powercap.c
> @@ -313,24 +313,33 @@ static int scmi_powercap_xfer_cap_get(const struct scmi_protocol_handle *ph,
> return ret;
> }
>
> -static int scmi_powercap_cap_get(const struct scmi_protocol_handle *ph,
> - u32 domain_id, u32 *power_cap)
> +static int __scmi_powercap_cap_get(const struct scmi_protocol_handle *ph,
> + const struct scmi_powercap_info *dom,
> + u32 *power_cap)
> {
> - struct scmi_powercap_info *dom;
> - struct powercap_info *pi = ph->get_priv(ph);
> -
> - if (!power_cap || domain_id >= pi->num_domains)
> - return -EINVAL;
> -
> - dom = pi->powercaps + domain_id;
> if (dom->fc_info && dom->fc_info[POWERCAP_FC_CAP].get_addr) {
> *power_cap = ioread32(dom->fc_info[POWERCAP_FC_CAP].get_addr);
> trace_scmi_fc_call(SCMI_PROTOCOL_POWERCAP, POWERCAP_CAP_GET,
> - domain_id, *power_cap, 0);
> + dom->id, *power_cap, 0);
> return 0;
> }
>
> - return scmi_powercap_xfer_cap_get(ph, domain_id, power_cap);
> + return scmi_powercap_xfer_cap_get(ph, dom->id, power_cap);
> +}
> +
> +static int scmi_powercap_cap_get(const struct scmi_protocol_handle *ph,
> + u32 domain_id, u32 *power_cap)
> +{
> + const struct scmi_powercap_info *dom;
> +
> + if (!power_cap)
> + return -EINVAL;
> +
> + dom = scmi_powercap_dom_info_get(ph, domain_id);
> + if (!dom)
> + return -EINVAL;
> +
> + return __scmi_powercap_cap_get(ph, dom, power_cap);
> }
>
> static int scmi_powercap_xfer_cap_set(const struct scmi_protocol_handle *ph,
> @@ -375,17 +384,20 @@ static int scmi_powercap_xfer_cap_set(const struct scmi_protocol_handle *ph,
> return ret;
> }
>
> -static int scmi_powercap_cap_set(const struct scmi_protocol_handle *ph,
> - u32 domain_id, u32 power_cap,
> - bool ignore_dresp)
> +static int __scmi_powercap_cap_set(const struct scmi_protocol_handle *ph,
> + struct powercap_info *pi, u32 domain_id,
> + u32 power_cap, bool ignore_dresp)
> {
> + int ret = -EINVAL;
> const struct scmi_powercap_info *pc;
>
> pc = scmi_powercap_dom_info_get(ph, domain_id);
> - if (!pc || !pc->powercap_cap_config || !power_cap ||
> - power_cap < pc->min_power_cap ||
> - power_cap > pc->max_power_cap)
> - return -EINVAL;
> + if (!pc || !pc->powercap_cap_config)
> + return ret;
> +
> + if (power_cap &&
> + (power_cap < pc->min_power_cap || power_cap > pc->max_power_cap))
> + return ret;
>
> if (pc->fc_info && pc->fc_info[POWERCAP_FC_CAP].set_addr) {
> struct scmi_fc_info *fci = &pc->fc_info[POWERCAP_FC_CAP];
> @@ -394,10 +406,23 @@ static int scmi_powercap_cap_set(const struct scmi_protocol_handle *ph,
> ph->hops->fastchannel_db_ring(fci->set_db);
> trace_scmi_fc_call(SCMI_PROTOCOL_POWERCAP, POWERCAP_CAP_SET,
> domain_id, power_cap, 0);
> - return 0;
> + ret = 0;
> + } else {
> + ret = scmi_powercap_xfer_cap_set(ph, pc, power_cap,
> + ignore_dresp);
> }
>
> - return scmi_powercap_xfer_cap_set(ph, pc, power_cap, ignore_dresp);
> + return ret;
> +}
> +
> +static int scmi_powercap_cap_set(const struct scmi_protocol_handle *ph,
> + u32 domain_id, u32 power_cap,
> + bool ignore_dresp)
> +{
> + struct powercap_info *pi = ph->get_priv(ph);
> +
> + return __scmi_powercap_cap_set(ph, pi, domain_id,
> + power_cap, ignore_dresp);
> }
>
> static int scmi_powercap_xfer_pai_get(const struct scmi_protocol_handle *ph,
> --
> 2.34.1
>
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