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X-Original-Sender: suravee.suthikulpanit@amd.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.217.175 as permitted sender) smtp.mailfrom=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , This patch introduces gicv2m_acpi_init(), which uses information in MADT GIC MSI frames structure to initialize GICv2m driver. Signed-off-by: Suravee Suthikulpanit Signed-off-by: Hanjun Guo --- drivers/irqchip/irq-gic-v2m.c | 94 +++++++++++++++++++++++++++++++++++++++++ drivers/irqchip/irq-gic.c | 3 ++ include/linux/irqchip/arm-gic.h | 6 +++ 3 files changed, 103 insertions(+) diff --git a/drivers/irqchip/irq-gic-v2m.c b/drivers/irqchip/irq-gic-v2m.c index 7e60f7e..290f5b3 100644 --- a/drivers/irqchip/irq-gic-v2m.c +++ b/drivers/irqchip/irq-gic-v2m.c @@ -15,9 +15,11 @@ #define pr_fmt(fmt) "GICv2m: " fmt +#include #include #include #include +#include #include #include #include @@ -138,6 +140,11 @@ static int gicv2m_irq_gic_domain_alloc(struct irq_domain *domain, fwspec.param[0] = 0; fwspec.param[1] = hwirq - 32; 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 & IRQ_TYPE_SENSE_MASK; } else { return -EINVAL; } @@ -255,6 +262,8 @@ static void gicv2m_teardown(void) kfree(v2m->bm); iounmap(v2m->base); of_node_put(to_of_node(v2m->fwnode)); + if (is_fwnode_irqchip(v2m->fwnode)) + irq_domain_free_fwnode(v2m->fwnode); kfree(v2m); } } @@ -359,6 +368,8 @@ static int __init gicv2m_init_one(struct fwnode_handle *fwnode, if (to_of_node(fwnode)) name = to_of_node(fwnode)->name; + else + name = irq_domain_get_irqchip_fwnode_name(fwnode); pr_info("Frame %s: range[%#lx:%#lx], SPI[%d:%d]\n", name, (unsigned long)res->start, (unsigned long)res->end, @@ -415,3 +426,86 @@ int __init gicv2m_of_init(struct device_node *node, struct irq_domain *parent) gicv2m_teardown(); return ret; } + +#ifdef CONFIG_ACPI +static int acpi_num_msi; + +static struct fwnode_handle *gicv2m_get_fwnode(struct device *dev) +{ + struct v2m_data *data; + + if (WARN_ON(acpi_num_msi <= 0)) + return NULL; + + /* We only return the fwnode of the first MSI frame. */ + data = list_first_entry_or_null(&v2m_nodes, + struct v2m_data, entry); + if (!data) + return NULL; + + return data->fwnode; +} + +static int __init +acpi_parse_madt_msi(struct acpi_subtable_header *header, + const unsigned long end) +{ + int ret; + struct resource res; + u32 spi_start = 0, nr_spis = 0; + struct acpi_madt_generic_msi_frame *m; + struct fwnode_handle *fwnode = NULL; + + m = (struct acpi_madt_generic_msi_frame *)header; + if (BAD_MADT_ENTRY(m, end)) + return -EINVAL; + + res.start = m->base_address; + res.end = m->base_address + 0x1000; + + if (m->flags & ACPI_MADT_OVERRIDE_SPI_VALUES) { + spi_start = m->spi_base; + nr_spis = m->spi_count; + + pr_info("ACPI overriding V2M MSI_TYPER (base:%u, num:%u)\n", + spi_start, nr_spis); + } + + fwnode = irq_domain_alloc_fwnode((void *)m->base_address); + if (!fwnode) { + pr_err("Unable to allocate GICv2m domain token\n"); + return -EINVAL; + } + + ret = gicv2m_init_one(fwnode, spi_start, nr_spis, &res); + + return ret; +} + +int __init gicv2m_acpi_init(struct irq_domain *parent) +{ + int ret; + + if (acpi_num_msi > 0) + return 0; + + acpi_num_msi = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_MSI_FRAME, + acpi_parse_madt_msi, 0); + + if (acpi_num_msi <= 0) + goto err_out; + + ret = gicv2m_allocate_domains(parent); + if (ret) + goto err_out; + + pci_msi_register_fwnode_provider(&gicv2m_get_fwnode); + + return 0; + +err_out: + gicv2m_teardown(); + return -EINVAL; +} + +#endif /* CONFIG_ACPI */ diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index 6685b33..bb3e1f2 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c @@ -1329,6 +1329,9 @@ gic_v2_acpi_init(struct acpi_table_header *table) __gic_init_bases(0, -1, dist_base, cpu_base, 0, domain_handle); + if (IS_ENABLED(CONFIG_ARM_GIC_V2M)) + gicv2m_acpi_init(gic_data[0].domain); + acpi_set_irq_model(ACPI_IRQ_MODEL_GIC, domain_handle); return 0; } diff --git a/include/linux/irqchip/arm-gic.h b/include/linux/irqchip/arm-gic.h index bae69e5..7398538 100644 --- a/include/linux/irqchip/arm-gic.h +++ b/include/linux/irqchip/arm-gic.h @@ -108,6 +108,12 @@ void gic_init(unsigned int nr, int start, int gicv2m_of_init(struct device_node *node, struct irq_domain *parent); +#ifdef CONFIG_ACPI +#include + +int gicv2m_acpi_init(struct irq_domain *parent); +#endif + void gic_send_sgi(unsigned int cpu_id, unsigned int irq); int gic_get_cpu_id(unsigned int cpu); void gic_migrate_target(unsigned int new_cpu_id);