| Message ID | 1466420541-20101-7-git-send-email-tn@semihalf.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On 2016/6/20 19:02, Tomasz Nowicki wrote: > ITS is prepared for being initialized different than DT, > therefore we can initialize it in ACPI way. We collect register base > address from MADT table and pass mandatory info to firmware-agnostic > ITS init call. > > Use here IORT lib to register ITS domain which then can be found and > used on to build another PCI MSI domain in hierarchical stack domain. > > NOTE: Waiting for proper ITS and NUMA node relation description in IORT > table, we pass around NUMA_NO_NODE to the its_probe_one init call. > This means that Cavium ThunderX erratum 23144 (pass1.1 only) > is not supported for ACPI boot method yet. > > Signed-off-by: Tomasz Nowicki <tn@semihalf.com> > Acked-by: Marc Zyngier <marc.zyngier@arm.com> > --- > drivers/irqchip/Kconfig | 1 + > drivers/irqchip/irq-gic-v3-its.c | 59 +++++++++++++++++++++++++++++++++++++++- > 2 files changed, 59 insertions(+), 1 deletion(-) > > diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig > index 5495a5b..fd4b8b8 100644 > --- a/drivers/irqchip/Kconfig > +++ b/drivers/irqchip/Kconfig > @@ -38,6 +38,7 @@ config ARM_GIC_V3 > config ARM_GIC_V3_ITS > bool > select PCI_MSI_IRQ_DOMAIN > + select IORT_TABLE if ACPI > > config ARM_NVIC > bool > diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c > index 1e0888d..c5c8616 100644 > --- a/drivers/irqchip/irq-gic-v3-its.c > +++ b/drivers/irqchip/irq-gic-v3-its.c > @@ -15,10 +15,13 @@ > * along with this program. If not, see <http://www.gnu.org/licenses/>. > */ > > +#include <linux/acpi.h> > #include <linux/bitmap.h> > #include <linux/cpu.h> > #include <linux/delay.h> > #include <linux/interrupt.h> > +#include <linux/irqdomain.h> > +#include <linux/iort.h> > #include <linux/log2.h> > #include <linux/mm.h> > #include <linux/msi.h> > @@ -1438,6 +1441,11 @@ static int its_irq_gic_domain_alloc(struct irq_domain *domain, > fwspec.param[0] = GIC_IRQ_TYPE_LPI; > fwspec.param[1] = hwirq; > fwspec.param[2] = IRQ_TYPE_EDGE_RISING; > + } else if (is_fwnode_irqchip(domain->parent->fwnode)) { > + fwspec.fwnode = domain->parent->fwnode; > + fwspec.param_count = 2; > + fwspec.param[0] = hwirq; > + fwspec.param[1] = IRQ_TYPE_EDGE_RISING; > } else { > return -EINVAL; > } > @@ -1792,6 +1800,55 @@ static int __init its_of_probe(struct device_node *node) > return 0; > } > > +#ifdef CONFIG_ACPI > + > +#define ACPI_GICV3_ITS_MEM_SIZE (SZ_128K) > + > +static int __init gic_acpi_parse_madt_its(struct acpi_subtable_header *header, > + const unsigned long end) > +{ > + struct acpi_madt_generic_translator *its_entry; > + struct fwnode_handle *dom_handle; > + struct resource res; > + int err; > + > + its_entry = (struct acpi_madt_generic_translator *)header; > + res.start = its_entry->base_address; > + res.end = its_entry->base_address + ACPI_GICV3_ITS_MEM_SIZE - 1; > + > + dom_handle = irq_domain_alloc_fwnode((void *)its_entry->base_address); > + if (!dom_handle) { > + pr_err("ITS@%pa: Unable to allocate GICv3 ITS domain token\n", > + &res.start); > + return -ENOMEM; > + } > + > + err = iort_register_domain_token(its_entry->translation_id, dom_handle); > + if (err) { > + pr_err("ITS@%pa: Unable to register GICv3 ITS domain token (ITS ID %d) to IORT\n", > + &res.start, its_entry->translation_id); > + goto dom_err; > + } > + > + err = its_probe_one(&res, dom_handle, NUMA_NO_NODE); > + if (!err) > + return 0; > + > + iort_deregister_domain_token(its_entry->translation_id); > +dom_err: > + irq_domain_free_fwnode(dom_handle); > + return err; > +} > + > +static void __init its_acpi_probe(void) > +{ > + acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR, > + gic_acpi_parse_madt_its, 0); > +} > +#else > +static void __init its_acpi_probe(void) { } > +#endif > + > int __init its_init(struct fwnode_handle *handle, struct rdists *rdists, > struct irq_domain *parent_domain) > { > @@ -1802,7 +1859,7 @@ int __init its_init(struct fwnode_handle *handle, struct rdists *rdists, > if (of_node) > its_of_probe(of_node); > else > - return -ENODEV; > + its_acpi_probe(); > > if (list_empty(&its_nodes)) { > pr_warn("ITS: No ITS available, not enabling LPIs\n"); > Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org> Thanks Hanjun -- To unsubscribe from this list: send the line "unsubscribe linux-pci" 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/Kconfig b/drivers/irqchip/Kconfig index 5495a5b..fd4b8b8 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -38,6 +38,7 @@ config ARM_GIC_V3 config ARM_GIC_V3_ITS bool select PCI_MSI_IRQ_DOMAIN + select IORT_TABLE if ACPI config ARM_NVIC bool diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 1e0888d..c5c8616 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -15,10 +15,13 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ +#include <linux/acpi.h> #include <linux/bitmap.h> #include <linux/cpu.h> #include <linux/delay.h> #include <linux/interrupt.h> +#include <linux/irqdomain.h> +#include <linux/iort.h> #include <linux/log2.h> #include <linux/mm.h> #include <linux/msi.h> @@ -1438,6 +1441,11 @@ static int its_irq_gic_domain_alloc(struct irq_domain *domain, fwspec.param[0] = GIC_IRQ_TYPE_LPI; fwspec.param[1] = hwirq; fwspec.param[2] = IRQ_TYPE_EDGE_RISING; + } else if (is_fwnode_irqchip(domain->parent->fwnode)) { + fwspec.fwnode = domain->parent->fwnode; + fwspec.param_count = 2; + fwspec.param[0] = hwirq; + fwspec.param[1] = IRQ_TYPE_EDGE_RISING; } else { return -EINVAL; } @@ -1792,6 +1800,55 @@ static int __init its_of_probe(struct device_node *node) return 0; } +#ifdef CONFIG_ACPI + +#define ACPI_GICV3_ITS_MEM_SIZE (SZ_128K) + +static int __init gic_acpi_parse_madt_its(struct acpi_subtable_header *header, + const unsigned long end) +{ + struct acpi_madt_generic_translator *its_entry; + struct fwnode_handle *dom_handle; + struct resource res; + int err; + + its_entry = (struct acpi_madt_generic_translator *)header; + res.start = its_entry->base_address; + res.end = its_entry->base_address + ACPI_GICV3_ITS_MEM_SIZE - 1; + + dom_handle = irq_domain_alloc_fwnode((void *)its_entry->base_address); + if (!dom_handle) { + pr_err("ITS@%pa: Unable to allocate GICv3 ITS domain token\n", + &res.start); + return -ENOMEM; + } + + err = iort_register_domain_token(its_entry->translation_id, dom_handle); + if (err) { + pr_err("ITS@%pa: Unable to register GICv3 ITS domain token (ITS ID %d) to IORT\n", + &res.start, its_entry->translation_id); + goto dom_err; + } + + err = its_probe_one(&res, dom_handle, NUMA_NO_NODE); + if (!err) + return 0; + + iort_deregister_domain_token(its_entry->translation_id); +dom_err: + irq_domain_free_fwnode(dom_handle); + return err; +} + +static void __init its_acpi_probe(void) +{ + acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR, + gic_acpi_parse_madt_its, 0); +} +#else +static void __init its_acpi_probe(void) { } +#endif + int __init its_init(struct fwnode_handle *handle, struct rdists *rdists, struct irq_domain *parent_domain) { @@ -1802,7 +1859,7 @@ int __init its_init(struct fwnode_handle *handle, struct rdists *rdists, if (of_node) its_of_probe(of_node); else - return -ENODEV; + its_acpi_probe(); if (list_empty(&its_nodes)) { pr_warn("ITS: No ITS available, not enabling LPIs\n");