| Message ID | 1480460259-8585-2-git-send-email-agustinv@codeaurora.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Agustin, please CC me for next version. On Tue, Nov 29, 2016 at 05:57:37PM -0500, Agustin Vega-Frias wrote: > When an Extended IRQ Resource contains a valid ResourceSource > use it to map the IRQ on the domain associated with the ACPI > device referenced. > > With this in place an irqchip driver can create its domain using > irq_domain_create_linear and pass the device fwnode to create > the domain mapping. When dependent devices are probed these > changes allow the ACPI core find the domain and map the IRQ. > > Signed-off-by: Agustin Vega-Frias <agustinv@codeaurora.org> > --- > drivers/acpi/Makefile | 2 +- > drivers/acpi/{gsi.c => irq.c} | 99 +++++++++++++++++++++++++++++++++++++------ [...] > -static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, > +static void acpi_dev_get_irqresource(struct resource *res, u32 hwirq, > + struct fwnode_handle *source, > u8 triggering, u8 polarity, u8 shareable, > bool legacy) > { > int irq, p, t; > > - if (!valid_IRQ(gsi)) { > - acpi_dev_irqresource_disabled(res, gsi); > + if (!source && !valid_IRQ(hwirq)) { If you make source a struct acpi_resource_source pointer it could be: if (source || !valid_IRQ(hwirq)) Actually we would not even need to pass the pointer, if we detect an acpi_resource_source dependency we can just disable the resource (without even looking-up the fwnode_handle, see below), it is a design choice we have to make. > + acpi_dev_irqresource_disabled(res, hwirq); > return; > } > > @@ -402,25 +403,25 @@ static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, > * using extended IRQ descriptors we take the IRQ configuration > * from _CRS directly. > */ > - if (legacy && !acpi_get_override_irq(gsi, &t, &p)) { > + if (legacy && !acpi_get_override_irq(hwirq, &t, &p)) { > u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; > u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; > > if (triggering != trig || polarity != pol) { > - pr_warning("ACPI: IRQ %d override to %s, %s\n", gsi, > - t ? "level" : "edge", p ? "low" : "high"); > + pr_warn("ACPI: IRQ %d override to %s, %s\n", hwirq, > + t ? "level" : "edge", p ? "low" : "high"); > triggering = trig; > polarity = pol; > } > } > > res->flags = acpi_dev_irq_flags(triggering, polarity, shareable); > - irq = acpi_register_gsi(NULL, gsi, triggering, polarity); > + irq = acpi_register_irq(source, hwirq, triggering, polarity); > if (irq >= 0) { > res->start = irq; > res->end = irq; > } else { > - acpi_dev_irqresource_disabled(res, gsi); > + acpi_dev_irqresource_disabled(res, hwirq); > } > } > > @@ -448,6 +449,7 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, > { > struct acpi_resource_irq *irq; > struct acpi_resource_extended_irq *ext_irq; > + struct fwnode_handle *src; > > switch (ares->type) { > case ACPI_RESOURCE_TYPE_IRQ: > @@ -460,7 +462,7 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, > acpi_dev_irqresource_disabled(res, 0); > return false; > } > - acpi_dev_get_irqresource(res, irq->interrupts[index], > + acpi_dev_get_irqresource(res, irq->interrupts[index], NULL, > irq->triggering, irq->polarity, > irq->sharable, true); > break; > @@ -470,7 +472,8 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, > acpi_dev_irqresource_disabled(res, 0); > return false; > } > - acpi_dev_get_irqresource(res, ext_irq->interrupts[index], > + src = acpi_get_irq_source_fwhandle(&ext_irq->resource_source); I think the only pending question on my side for this series is whether we still carry out the domain look-up here (as you are doing now), or, if we detect a resource_source dependency, we just disable the resource and leave the deferred probing mechanism to deal with it, this will completely decouple the current resource parsing from the deferred probe mechanism that you are introducing; basically this is equivalent to saying "if the IRQ resource has a dependency let's resolve it at acpi_irq_get() time, not now". I am fine either way, I just think that leaving the domain look-up in the middle of the IRQ resource parsing is not really clean-cut. Thanks, Lorenzo > + acpi_dev_get_irqresource(res, ext_irq->interrupts[index], src, > ext_irq->triggering, ext_irq->polarity, > ext_irq->sharable, false); > break; > diff --git a/include/linux/acpi.h b/include/linux/acpi.h > index 61a3d90..154e576 100644 > --- a/include/linux/acpi.h > +++ b/include/linux/acpi.h > @@ -321,6 +321,25 @@ void acpi_set_irq_model(enum acpi_irq_model_id model, > */ > void acpi_unregister_gsi (u32 gsi); > > +#ifdef CONFIG_ACPI_GENERIC_GSI > +struct fwnode_handle * > +acpi_get_irq_source_fwhandle(const struct acpi_resource_source *source); > +int acpi_register_irq(struct fwnode_handle *source, u32 hwirq, int trigger, > + int polarity); > +void acpi_unregister_irq(struct fwnode_handle *source, u32 hwirq); > +#else > +#define acpi_get_irq_source_fwhandle(source) (NULL) > +static inline int acpi_register_irq(struct fwnode_handle *source, u32 hwirq, > + int trigger, int polarity) > +{ > + return acpi_register_gsi(NULL, hwirq, trigger, polarity); > +} > +static inline void acpi_unregister_irq(struct fwnode_handle *source, u32 hwirq) > +{ > + acpi_unregister_gsi(hwirq); > +} > +#endif > + > struct pci_dev; > > int acpi_pci_irq_enable (struct pci_dev *dev); > -- > Qualcomm Datacenter Technologies, Inc. on behalf of the Qualcomm Technologies, Inc. > Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project. > > -- > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Lorenzo, On 2016-12-08 06:05, Lorenzo Pieralisi wrote: > Hi Agustin, > > please CC me for next version. > > On Tue, Nov 29, 2016 at 05:57:37PM -0500, Agustin Vega-Frias wrote: >> When an Extended IRQ Resource contains a valid ResourceSource >> use it to map the IRQ on the domain associated with the ACPI >> device referenced. >> >> With this in place an irqchip driver can create its domain using >> irq_domain_create_linear and pass the device fwnode to create >> the domain mapping. When dependent devices are probed these >> changes allow the ACPI core find the domain and map the IRQ. >> >> Signed-off-by: Agustin Vega-Frias <agustinv@codeaurora.org> >> --- >> drivers/acpi/Makefile | 2 +- >> drivers/acpi/{gsi.c => irq.c} | 99 >> +++++++++++++++++++++++++++++++++++++------ > > [...] > >> -static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, >> +static void acpi_dev_get_irqresource(struct resource *res, u32 hwirq, >> + struct fwnode_handle *source, >> u8 triggering, u8 polarity, u8 shareable, >> bool legacy) >> { >> int irq, p, t; >> >> - if (!valid_IRQ(gsi)) { >> - acpi_dev_irqresource_disabled(res, gsi); >> + if (!source && !valid_IRQ(hwirq)) { > > If you make source a struct acpi_resource_source pointer it could be: > > if (source || !valid_IRQ(hwirq)) > > Actually we would not even need to pass the pointer, if we detect > an acpi_resource_source dependency we can just disable the resource > (without even looking-up the fwnode_handle, see below), it is a design > choice we have to make. > >> + acpi_dev_irqresource_disabled(res, hwirq); >> return; >> } >> >> @@ -402,25 +403,25 @@ static void acpi_dev_get_irqresource(struct >> resource *res, u32 gsi, >> * using extended IRQ descriptors we take the IRQ configuration >> * from _CRS directly. >> */ >> - if (legacy && !acpi_get_override_irq(gsi, &t, &p)) { >> + if (legacy && !acpi_get_override_irq(hwirq, &t, &p)) { >> u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; >> u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; >> >> if (triggering != trig || polarity != pol) { >> - pr_warning("ACPI: IRQ %d override to %s, %s\n", gsi, >> - t ? "level" : "edge", p ? "low" : "high"); >> + pr_warn("ACPI: IRQ %d override to %s, %s\n", hwirq, >> + t ? "level" : "edge", p ? "low" : "high"); >> triggering = trig; >> polarity = pol; >> } >> } >> >> res->flags = acpi_dev_irq_flags(triggering, polarity, shareable); >> - irq = acpi_register_gsi(NULL, gsi, triggering, polarity); >> + irq = acpi_register_irq(source, hwirq, triggering, polarity); >> if (irq >= 0) { >> res->start = irq; >> res->end = irq; >> } else { >> - acpi_dev_irqresource_disabled(res, gsi); >> + acpi_dev_irqresource_disabled(res, hwirq); >> } >> } >> >> @@ -448,6 +449,7 @@ bool acpi_dev_resource_interrupt(struct >> acpi_resource *ares, int index, >> { >> struct acpi_resource_irq *irq; >> struct acpi_resource_extended_irq *ext_irq; >> + struct fwnode_handle *src; >> >> switch (ares->type) { >> case ACPI_RESOURCE_TYPE_IRQ: >> @@ -460,7 +462,7 @@ bool acpi_dev_resource_interrupt(struct >> acpi_resource *ares, int index, >> acpi_dev_irqresource_disabled(res, 0); >> return false; >> } >> - acpi_dev_get_irqresource(res, irq->interrupts[index], >> + acpi_dev_get_irqresource(res, irq->interrupts[index], NULL, >> irq->triggering, irq->polarity, >> irq->sharable, true); >> break; >> @@ -470,7 +472,8 @@ bool acpi_dev_resource_interrupt(struct >> acpi_resource *ares, int index, >> acpi_dev_irqresource_disabled(res, 0); >> return false; >> } >> - acpi_dev_get_irqresource(res, ext_irq->interrupts[index], >> + src = acpi_get_irq_source_fwhandle(&ext_irq->resource_source); > > I think the only pending question on my side for this series is whether > we still carry out the domain look-up here (as you are doing now), or, > if we detect a resource_source dependency, we just disable the resource > and leave the deferred probing mechanism to deal with it, this will > completely decouple the current resource parsing from the deferred > probe > mechanism that you are introducing; basically this is equivalent to > saying "if the IRQ resource has a dependency let's resolve it at > acpi_irq_get() time, not now". > I'm also torn about this so I am going to leave most of this code as it was originally and just ensure we don't attempt the mapping when we have a resource source. I other words bus scan only maps GSIs and other IRQs are mapped via acpi_irq_get(). Thanks, Agustin > I am fine either way, I just think that leaving the domain look-up > in the middle of the IRQ resource parsing is not really clean-cut. > > Thanks, > Lorenzo > >> + acpi_dev_get_irqresource(res, ext_irq->interrupts[index], src, >> ext_irq->triggering, ext_irq->polarity, >> ext_irq->sharable, false); >> break; >> diff --git a/include/linux/acpi.h b/include/linux/acpi.h >> index 61a3d90..154e576 100644 >> --- a/include/linux/acpi.h >> +++ b/include/linux/acpi.h >> @@ -321,6 +321,25 @@ void acpi_set_irq_model(enum acpi_irq_model_id >> model, >> */ >> void acpi_unregister_gsi (u32 gsi); >> >> +#ifdef CONFIG_ACPI_GENERIC_GSI >> +struct fwnode_handle * >> +acpi_get_irq_source_fwhandle(const struct acpi_resource_source >> *source); >> +int acpi_register_irq(struct fwnode_handle *source, u32 hwirq, int >> trigger, >> + int polarity); >> +void acpi_unregister_irq(struct fwnode_handle *source, u32 hwirq); >> +#else >> +#define acpi_get_irq_source_fwhandle(source) (NULL) >> +static inline int acpi_register_irq(struct fwnode_handle *source, u32 >> hwirq, >> + int trigger, int polarity) >> +{ >> + return acpi_register_gsi(NULL, hwirq, trigger, polarity); >> +} >> +static inline void acpi_unregister_irq(struct fwnode_handle *source, >> u32 hwirq) >> +{ >> + acpi_unregister_gsi(hwirq); >> +} >> +#endif >> + >> struct pci_dev; >> >> int acpi_pci_irq_enable (struct pci_dev *dev); >> -- >> Qualcomm Datacenter Technologies, Inc. on behalf of the Qualcomm >> Technologies, Inc. >> Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a >> Linux Foundation Collaborative Project. >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-acpi" >> in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index 9ed0878..a391bbc 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -55,7 +55,7 @@ acpi-$(CONFIG_DEBUG_FS) += debugfs.o acpi-$(CONFIG_ACPI_NUMA) += numa.o acpi-$(CONFIG_ACPI_PROCFS_POWER) += cm_sbs.o acpi-y += acpi_lpat.o -acpi-$(CONFIG_ACPI_GENERIC_GSI) += gsi.o +acpi-$(CONFIG_ACPI_GENERIC_GSI) += irq.o acpi-$(CONFIG_ACPI_WATCHDOG) += acpi_watchdog.o # These are (potentially) separate modules diff --git a/drivers/acpi/gsi.c b/drivers/acpi/irq.c similarity index 52% rename from drivers/acpi/gsi.c rename to drivers/acpi/irq.c index ee9e0f2..e82eb6e 100644 --- a/drivers/acpi/gsi.c +++ b/drivers/acpi/irq.c @@ -18,6 +18,45 @@ static struct fwnode_handle *acpi_gsi_domain_id; /** + * acpi_get_irq_source_fwhandle() - Retrieve the fwhandle of the given + * acpi_resource_source which is used + * to be used as an IRQ domain id + * @source: acpi_resource_source to use for the lookup + * + * Returns: The appropriate IRQ fwhandle domain id + * NULL on failure + */ +struct fwnode_handle * +acpi_get_irq_source_fwhandle(const struct acpi_resource_source *source) +{ + struct fwnode_handle *result; + struct acpi_device *device; + acpi_handle handle; + acpi_status status; + + if (!source->string_length) + return acpi_gsi_domain_id; + + status = acpi_get_handle(NULL, source->string_ptr, &handle); + if (ACPI_FAILURE(status)) { + pr_warn("Could not find handle for %s\n", source->string_ptr); + return NULL; + } + + device = acpi_bus_get_acpi_device(handle); + if (!device) { + pr_warn("Could not get device for %s\n", source->string_ptr); + return NULL; + } + + result = &device->fwnode; + acpi_bus_put_acpi_device(device); + + return result; +} +EXPORT_SYMBOL_GPL(acpi_get_irq_source_fwhandle); + +/** * acpi_gsi_to_irq() - Retrieve the linux irq number for a given GSI * @gsi: GSI IRQ number to map * @irq: pointer where linux IRQ number is stored @@ -42,6 +81,51 @@ int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); /** + * acpi_register_irq() - Map a hardware to a linux IRQ number + * @source: IRQ source + * @hwirq: Hardware IRQ number + * @trigger: trigger type of the IRQ number to be mapped + * @polarity: polarity of the IRQ to be mapped + * + * Returns: a valid linux IRQ number on success + * -EINVAL on failure + * -EPROBE_DEFER if the IRQ domain lookup failed + */ +int acpi_register_irq(struct fwnode_handle *source, u32 hwirq, int trigger, + int polarity) +{ + struct irq_fwspec fwspec; + + if (!source) + source = acpi_gsi_domain_id; + + if (irq_find_matching_fwnode(source, DOMAIN_BUS_ANY) == NULL) + return -EPROBE_DEFER; + + fwspec.fwnode = source; + fwspec.param[0] = hwirq; + fwspec.param[1] = acpi_dev_get_irq_type(trigger, polarity); + fwspec.param_count = 2; + + return irq_create_fwspec_mapping(&fwspec); +} +EXPORT_SYMBOL_GPL(acpi_register_irq); + +/** + * acpi_unregister_irq() - Free a Hardware IRQ<->linux IRQ number mapping + * @hwirq: Hardware IRQ number + */ +void acpi_unregister_irq(struct fwnode_handle *source, u32 hwirq) +{ + struct irq_domain *d = irq_find_matching_fwnode(source, + DOMAIN_BUS_ANY); + int irq = irq_find_mapping(d, hwirq); + + irq_dispose_mapping(irq); +} +EXPORT_SYMBOL_GPL(acpi_unregister_irq); + +/** * acpi_register_gsi() - Map a GSI to a linux IRQ number * @dev: device for which IRQ has to be mapped * @gsi: GSI IRQ number @@ -54,19 +138,12 @@ int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) { - struct irq_fwspec fwspec; - if (WARN_ON(!acpi_gsi_domain_id)) { pr_warn("GSI: No registered irqchip, giving up\n"); return -EINVAL; } - fwspec.fwnode = acpi_gsi_domain_id; - fwspec.param[0] = gsi; - fwspec.param[1] = acpi_dev_get_irq_type(trigger, polarity); - fwspec.param_count = 2; - - return irq_create_fwspec_mapping(&fwspec); + return acpi_register_irq(acpi_gsi_domain_id, gsi, trigger, polarity); } EXPORT_SYMBOL_GPL(acpi_register_gsi); @@ -76,11 +153,7 @@ int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, */ void acpi_unregister_gsi(u32 gsi) { - struct irq_domain *d = irq_find_matching_fwnode(acpi_gsi_domain_id, - DOMAIN_BUS_ANY); - int irq = irq_find_mapping(d, gsi); - - irq_dispose_mapping(irq); + acpi_unregister_irq(acpi_gsi_domain_id, gsi); } EXPORT_SYMBOL_GPL(acpi_unregister_gsi); diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c index 56241eb..98b94eb 100644 --- a/drivers/acpi/resource.c +++ b/drivers/acpi/resource.c @@ -374,21 +374,22 @@ unsigned int acpi_dev_get_irq_type(int triggering, int polarity) } EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type); -static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi) +static void acpi_dev_irqresource_disabled(struct resource *res, u32 hwirq) { - res->start = gsi; - res->end = gsi; + res->start = hwirq; + res->end = hwirq; res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED | IORESOURCE_UNSET; } -static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, +static void acpi_dev_get_irqresource(struct resource *res, u32 hwirq, + struct fwnode_handle *source, u8 triggering, u8 polarity, u8 shareable, bool legacy) { int irq, p, t; - if (!valid_IRQ(gsi)) { - acpi_dev_irqresource_disabled(res, gsi); + if (!source && !valid_IRQ(hwirq)) { + acpi_dev_irqresource_disabled(res, hwirq); return; } @@ -402,25 +403,25 @@ static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, * using extended IRQ descriptors we take the IRQ configuration * from _CRS directly. */ - if (legacy && !acpi_get_override_irq(gsi, &t, &p)) { + if (legacy && !acpi_get_override_irq(hwirq, &t, &p)) { u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; if (triggering != trig || polarity != pol) { - pr_warning("ACPI: IRQ %d override to %s, %s\n", gsi, - t ? "level" : "edge", p ? "low" : "high"); + pr_warn("ACPI: IRQ %d override to %s, %s\n", hwirq, + t ? "level" : "edge", p ? "low" : "high"); triggering = trig; polarity = pol; } } res->flags = acpi_dev_irq_flags(triggering, polarity, shareable); - irq = acpi_register_gsi(NULL, gsi, triggering, polarity); + irq = acpi_register_irq(source, hwirq, triggering, polarity); if (irq >= 0) { res->start = irq; res->end = irq; } else { - acpi_dev_irqresource_disabled(res, gsi); + acpi_dev_irqresource_disabled(res, hwirq); } } @@ -448,6 +449,7 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, { struct acpi_resource_irq *irq; struct acpi_resource_extended_irq *ext_irq; + struct fwnode_handle *src; switch (ares->type) { case ACPI_RESOURCE_TYPE_IRQ: @@ -460,7 +462,7 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, acpi_dev_irqresource_disabled(res, 0); return false; } - acpi_dev_get_irqresource(res, irq->interrupts[index], + acpi_dev_get_irqresource(res, irq->interrupts[index], NULL, irq->triggering, irq->polarity, irq->sharable, true); break; @@ -470,7 +472,8 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, acpi_dev_irqresource_disabled(res, 0); return false; } - acpi_dev_get_irqresource(res, ext_irq->interrupts[index], + src = acpi_get_irq_source_fwhandle(&ext_irq->resource_source); + acpi_dev_get_irqresource(res, ext_irq->interrupts[index], src, ext_irq->triggering, ext_irq->polarity, ext_irq->sharable, false); break; diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 61a3d90..154e576 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -321,6 +321,25 @@ void acpi_set_irq_model(enum acpi_irq_model_id model, */ void acpi_unregister_gsi (u32 gsi); +#ifdef CONFIG_ACPI_GENERIC_GSI +struct fwnode_handle * +acpi_get_irq_source_fwhandle(const struct acpi_resource_source *source); +int acpi_register_irq(struct fwnode_handle *source, u32 hwirq, int trigger, + int polarity); +void acpi_unregister_irq(struct fwnode_handle *source, u32 hwirq); +#else +#define acpi_get_irq_source_fwhandle(source) (NULL) +static inline int acpi_register_irq(struct fwnode_handle *source, u32 hwirq, + int trigger, int polarity) +{ + return acpi_register_gsi(NULL, hwirq, trigger, polarity); +} +static inline void acpi_unregister_irq(struct fwnode_handle *source, u32 hwirq) +{ + acpi_unregister_gsi(hwirq); +} +#endif + struct pci_dev; int acpi_pci_irq_enable (struct pci_dev *dev);
When an Extended IRQ Resource contains a valid ResourceSource use it to map the IRQ on the domain associated with the ACPI device referenced. With this in place an irqchip driver can create its domain using irq_domain_create_linear and pass the device fwnode to create the domain mapping. When dependent devices are probed these changes allow the ACPI core find the domain and map the IRQ. Signed-off-by: Agustin Vega-Frias <agustinv@codeaurora.org> --- drivers/acpi/Makefile | 2 +- drivers/acpi/{gsi.c => irq.c} | 99 +++++++++++++++++++++++++++++++++++++------ drivers/acpi/resource.c | 29 +++++++------ include/linux/acpi.h | 19 +++++++++ 4 files changed, 122 insertions(+), 27 deletions(-) rename drivers/acpi/{gsi.c => irq.c} (52%)