Re: [PATCH v3 06/13] ACPI: resources: Add wake_capable parameter to acpi_dev_irq_flags

From: Raul Rangel
Date: Mon Sep 19 2022 - 11:36:57 EST

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In reply to: Andy Shevchenko: "Re: [PATCH v3 06/13] ACPI: resources: Add wake_capable parameter to acpi_dev_irq_flags"
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On Mon, Sep 19, 2022 at 3:54 AM Andy Shevchenko
<andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
>
> On Wed, Sep 14, 2022 at 05:57:54PM -0600, Raul E Rangel wrote:
> > ACPI IRQ/Interrupt resources contain a bit that describes if the
> > interrupt should wake the system. This change exposes that bit via
> > a new IORESOURCE_IRQ_WAKECAPABLE flag. Drivers should check this flag
> > before arming an IRQ to wake the system.
>

> From code perspective it's straightforward, so
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> (take a look into nit-picks, though)

I went ahead and re-ran clang-format with a 96 char limit, then I
manually applied the rest of the nits.
Thanks!

>
> From the functional perspective AFAIU it's appreciated, but I'm not
> a guru in this domain to tell.
>
> > Signed-off-by: Raul E Rangel <rrangel@xxxxxxxxxxxx>
> > ---
> >
> > Changes in v3:
> > - Fixed bad indent
> >
> > Changes in v2:
> > - Added ability to extract wake bit from Interrupt/IRQ resources
> >
> > drivers/acpi/irq.c | 11 ++++++++---
> > drivers/acpi/resource.c | 24 +++++++++++++++++-------
> > drivers/pnp/pnpacpi/rsparser.c | 9 ++++++---
> > include/linux/acpi.h | 3 ++-
> > include/linux/ioport.h | 3 ++-
> > 5 files changed, 35 insertions(+), 15 deletions(-)
> >
> > diff --git a/drivers/acpi/irq.c b/drivers/acpi/irq.c
> > index dabe45eba055d1..5483cf9a28e3a0 100644
> > --- a/drivers/acpi/irq.c
> > +++ b/drivers/acpi/irq.c
> > @@ -147,6 +147,7 @@ struct acpi_irq_parse_one_ctx {
> > * @polarity: polarity attributes of hwirq
> > * @polarity: polarity attributes of hwirq
> > * @shareable: shareable attributes of hwirq
> > + * @wake_capable: wake capable attribute of hwirq
> > * @ctx: acpi_irq_parse_one_ctx updated by this function
> > *
> > * Description:
> > @@ -156,12 +157,14 @@ struct acpi_irq_parse_one_ctx {
> > static inline void acpi_irq_parse_one_match(struct fwnode_handle *fwnode,
> > u32 hwirq, u8 triggering,
> > u8 polarity, u8 shareable,
> > + u8 wake_capable,
> > struct acpi_irq_parse_one_ctx *ctx)
> > {
> > if (!fwnode)
> > return;
> > ctx->rc = 0;
> > - *ctx->res_flags = acpi_dev_irq_flags(triggering, polarity, shareable);
> > + *ctx->res_flags = acpi_dev_irq_flags(triggering, polarity, shareable,
> > + wake_capable);
>
> Can be on one line.
>
> > ctx->fwspec->fwnode = fwnode;
> > ctx->fwspec->param[0] = hwirq;
> > ctx->fwspec->param[1] = acpi_dev_get_irq_type(triggering, polarity);
> > @@ -204,7 +207,8 @@ static acpi_status acpi_irq_parse_one_cb(struct acpi_resource *ares,
> > fwnode = acpi_get_gsi_domain_id(irq->interrupts[ctx->index]);
> > acpi_irq_parse_one_match(fwnode, irq->interrupts[ctx->index],
> > irq->triggering, irq->polarity,
> > - irq->shareable, ctx);
> > + irq->shareable, irq->wake_capable,
> > + ctx);
>
> Ditto.
>
> > return AE_CTRL_TERMINATE;
> > case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
> > eirq = &ares->data.extended_irq;
> > @@ -218,7 +222,8 @@ static acpi_status acpi_irq_parse_one_cb(struct acpi_resource *ares,
> > eirq->interrupts[ctx->index]);
> > acpi_irq_parse_one_match(fwnode, eirq->interrupts[ctx->index],
> > eirq->triggering, eirq->polarity,
> > - eirq->shareable, ctx);
> > + eirq->shareable, eirq->wake_capable,
> > + ctx);
>
> Ditto.
>
> > return AE_CTRL_TERMINATE;
> > }
> >
> > diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
> > index 510cdec375c4d8..6a1c008a348902 100644
> > --- a/drivers/acpi/resource.c
> > +++ b/drivers/acpi/resource.c
> > @@ -336,8 +336,10 @@ EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
> > * @triggering: Triggering type as provided by ACPI.
> > * @polarity: Interrupt polarity as provided by ACPI.
> > * @shareable: Whether or not the interrupt is shareable.
> > + * @wake_capable: Wake capability as provided by ACPI.
> > */
> > -unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable)
> > +unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable,
> > + u8 wake_capable)
>
> Ditto.
>
> > {
> > unsigned long flags;
> >
> > @@ -351,6 +353,9 @@ unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable)
> > if (shareable == ACPI_SHARED)
> > flags |= IORESOURCE_IRQ_SHAREABLE;
> >
> > + if (wake_capable == ACPI_WAKE_CAPABLE)
> > + flags |= IORESOURCE_IRQ_WAKECAPABLE;
> > +
> > return flags | IORESOURCE_IRQ;
> > }
> > EXPORT_SYMBOL_GPL(acpi_dev_irq_flags);
> > @@ -442,7 +447,7 @@ static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity,
> >
> > static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
> > u8 triggering, u8 polarity, u8 shareable,
> > - bool check_override)
> > + u8 wake_capable, bool check_override)
> > {
> > int irq, p, t;
> >
> > @@ -475,7 +480,8 @@ static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
> > }
> > }
> >
> > - res->flags = acpi_dev_irq_flags(triggering, polarity, shareable);
> > + res->flags = acpi_dev_irq_flags(triggering, polarity, shareable,
> > + wake_capable);
>
> Ditto.
>
> > irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
> > if (irq >= 0) {
> > res->start = irq;
> > @@ -523,7 +529,8 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
> > }
> > acpi_dev_get_irqresource(res, irq->interrupts[index],
> > irq->triggering, irq->polarity,
> > - irq->shareable, true);
> > + irq->shareable, irq->wake_capable,
> > + true);
> > break;
> > case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
> > ext_irq = &ares->data.extended_irq;
> > @@ -532,9 +539,12 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
> > return false;
> > }
> > if (is_gsi(ext_irq))
> > - acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
> > - ext_irq->triggering, ext_irq->polarity,
> > - ext_irq->shareable, false);
> > + acpi_dev_get_irqresource(res,
> > + ext_irq->interrupts[index],
> > + ext_irq->triggering,
> > + ext_irq->polarity,
> > + ext_irq->shareable,
> > + ext_irq->wake_capable, false);
>
> Maybe false on the next line to split FW parameters from pure software ones?
>
> > else
> > irqresource_disabled(res, 0);
> > break;
> > diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
> > index da78dc77aed32e..55b28fc0a94042 100644
> > --- a/drivers/pnp/pnpacpi/rsparser.c
> > +++ b/drivers/pnp/pnpacpi/rsparser.c
> > @@ -206,7 +206,8 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
> > if (i >= 0) {
> > flags = acpi_dev_irq_flags(gpio->triggering,
> > gpio->polarity,
> > - gpio->shareable);
> > + gpio->shareable,
> > + gpio->wake_capable);
> > } else {
> > flags = IORESOURCE_DISABLED;
> > }
> > @@ -315,7 +316,8 @@ static __init void pnpacpi_parse_irq_option(struct pnp_dev *dev,
> > if (p->interrupts[i])
> > __set_bit(p->interrupts[i], map.bits);
> >
> > - flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->shareable);
> > + flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->shareable,
> > + p->wake_capable);
> > pnp_register_irq_resource(dev, option_flags, &map, flags);
> > }
> >
> > @@ -339,7 +341,8 @@ static __init void pnpacpi_parse_ext_irq_option(struct pnp_dev *dev,
> > }
> > }
> >
> > - flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->shareable);
> > + flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->shareable,
> > + p->wake_capable);
>
> One line?
>
> > pnp_register_irq_resource(dev, option_flags, &map, flags);
> > }
> >
> > diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> > index d3121cef6cc3bc..9f7947ee1b006f 100644
> > --- a/include/linux/acpi.h
> > +++ b/include/linux/acpi.h
> > @@ -495,7 +495,8 @@ bool acpi_dev_resource_address_space(struct acpi_resource *ares,
> > struct resource_win *win);
> > bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
> > struct resource_win *win);
> > -unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable);
> > +unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable,
> > + u8 wake_capable);
>
> One line?
>
> > unsigned int acpi_dev_get_irq_type(int triggering, int polarity);
> > bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
> > struct resource *res);
> > diff --git a/include/linux/ioport.h b/include/linux/ioport.h
> > index 616b683563a970..3baeea4d903bfd 100644
> > --- a/include/linux/ioport.h
> > +++ b/include/linux/ioport.h
> > @@ -79,7 +79,8 @@ struct resource {
> > #define IORESOURCE_IRQ_HIGHLEVEL (1<<2)
> > #define IORESOURCE_IRQ_LOWLEVEL (1<<3)
> > #define IORESOURCE_IRQ_SHAREABLE (1<<4)
> > -#define IORESOURCE_IRQ_OPTIONAL (1<<5)
> > +#define IORESOURCE_IRQ_OPTIONAL (1<<5)
> > +#define IORESOURCE_IRQ_WAKECAPABLE (1<<6)
> >
> > /* PnP DMA specific bits (IORESOURCE_BITS) */
> > #define IORESOURCE_DMA_TYPE_MASK (3<<0)
> > --
> > 2.37.3.968.ga6b4b080e4-goog
> >
>
> --
> With Best Regards,
> Andy Shevchenko
>
>

Next message: Prabhakar: "[PATCH v3] media: dt-bindings: ov5645: Convert OV5645 binding to a schema"
Previous message: Jonathan Cameron: "Re: [PATCH v6 4/9] iio: adc: mcp3911: use resource-managed version of iio_device_register"
In reply to: Andy Shevchenko: "Re: [PATCH v3 06/13] ACPI: resources: Add wake_capable parameter to acpi_dev_irq_flags"
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