| Message ID | 1482384922-21507-8-git-send-email-guohanjun@huawei.com |
|---|---|
| State | Superseded |
| Headers | show |
On 2016/12/22 13:35, Hanjun Guo wrote: > From: Hanjun Guo <hanjun.guo@linaro.org> > > With the introduction of its_pmsi_init_one(), we can add some code > on top for ACPI support of platform MSI. > > We are scanning the MADT table to get the ITS entry(ies), then use > the information to create the platform msi domain for devices connect > to it, just like the PCI MSI for ITS did. > > Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> > Tested-by: Sinan Kaya <okaya@codeaurora.org> > Cc: Marc Zyngier <marc.zyngier@arm.com> > Cc: Tomasz Nowicki <tn@semihalf.com> > Cc: Thomas Gleixner <tglx@linutronix.de> > --- > drivers/irqchip/irq-gic-v3-its-platform-msi.c | 36 +++++++++++++++++++++++++++ > 1 file changed, 36 insertions(+) > > diff --git a/drivers/irqchip/irq-gic-v3-its-platform-msi.c b/drivers/irqchip/irq-gic-v3-its-platform-msi.c > index ff72704..0be0437 100644 > --- a/drivers/irqchip/irq-gic-v3-its-platform-msi.c > +++ b/drivers/irqchip/irq-gic-v3-its-platform-msi.c > @@ -105,6 +105,41 @@ static int __init its_pmsi_init_one(struct fwnode_handle *fwnode, > return 0; > } > > +#ifdef CONFIG_ACPI > +static int __init > +its_pmsi_parse_madt(struct acpi_subtable_header *header, > + const unsigned long end) > +{ > + struct acpi_madt_generic_translator *its_entry; > + struct fwnode_handle *domain_handle; > + const char *node_name; > + int err = -ENXIO; > + > + its_entry = (struct acpi_madt_generic_translator *)header; > + node_name = kasprintf(GFP_KERNEL, "ITS@0x%lx", > + (long)its_entry->base_address); > + domain_handle = iort_find_domain_token(its_entry->translation_id); > + if (!domain_handle) { > + pr_err("%s: Unable to locate ITS domain handle\n", node_name); > + goto out; > + } > + > + err = its_pmsi_init_one(domain_handle, node_name); > + > +out: > + kfree(node_name); > + return err; > +} > + > +static void __init its_acpi_pmsi_init(void) > +{ > + acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR, > + its_pmsi_parse_madt, 0); > +} > +#else > +static inline void its_acpi_pmsi_init(void) { } > +#endif > + > static void __init its_pmsi_of_init(void) > { > struct device_node *np; > @@ -121,6 +156,7 @@ static void __init its_pmsi_of_init(void) > static int __init its_pmsi_init(void) > { > its_pmsi_of_init(); > + its_acpi_pmsi_init(); > return 0; > } > early_initcall(its_pmsi_init); Tested-by: Xinwei Kong <kong.kongxinwei@hisilicon.com> -- 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/irqchip/irq-gic-v3-its-platform-msi.c b/drivers/irqchip/irq-gic-v3-its-platform-msi.c index ff72704..0be0437 100644 --- a/drivers/irqchip/irq-gic-v3-its-platform-msi.c +++ b/drivers/irqchip/irq-gic-v3-its-platform-msi.c @@ -105,6 +105,41 @@ static int __init its_pmsi_init_one(struct fwnode_handle *fwnode, return 0; } +#ifdef CONFIG_ACPI +static int __init +its_pmsi_parse_madt(struct acpi_subtable_header *header, + const unsigned long end) +{ + struct acpi_madt_generic_translator *its_entry; + struct fwnode_handle *domain_handle; + const char *node_name; + int err = -ENXIO; + + its_entry = (struct acpi_madt_generic_translator *)header; + node_name = kasprintf(GFP_KERNEL, "ITS@0x%lx", + (long)its_entry->base_address); + domain_handle = iort_find_domain_token(its_entry->translation_id); + if (!domain_handle) { + pr_err("%s: Unable to locate ITS domain handle\n", node_name); + goto out; + } + + err = its_pmsi_init_one(domain_handle, node_name); + +out: + kfree(node_name); + return err; +} + +static void __init its_acpi_pmsi_init(void) +{ + acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR, + its_pmsi_parse_madt, 0); +} +#else +static inline void its_acpi_pmsi_init(void) { } +#endif + static void __init its_pmsi_of_init(void) { struct device_node *np; @@ -121,6 +156,7 @@ static void __init its_pmsi_of_init(void) static int __init its_pmsi_init(void) { its_pmsi_of_init(); + its_acpi_pmsi_init(); return 0; } early_initcall(its_pmsi_init);