From: Jon Hunter Date: Tue, 10 May 2016 15:14:45 +0000 (+0100) Subject: irqchip/gic: Add helper functions for GIC setup and teardown X-Git-Tag: v5.15~13642^2^2~3 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d6490461a102094891d8a2712c51365f86ac1a40;p=platform%2Fkernel%2Flinux-starfive.git irqchip/gic: Add helper functions for GIC setup and teardown Move the code that sets-up a GIC via device-tree into it's own function and add a generic function for GIC teardown that can be used for both device-tree and ACPI to unmap the GIC memory. Signed-off-by: Jon Hunter Signed-off-by: Marc Zyngier --- diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index f4c14f9..113e2d0 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c @@ -1197,6 +1197,17 @@ void __init gic_init(unsigned int gic_nr, int irq_start, __gic_init_bases(gic, irq_start, NULL); } +static void gic_teardown(struct gic_chip_data *gic) +{ + if (WARN_ON(!gic)) + return; + + if (gic->raw_dist_base) + iounmap(gic->raw_dist_base); + if (gic->raw_cpu_base) + iounmap(gic->raw_cpu_base); +} + #ifdef CONFIG_OF static int gic_cnt __initdata; @@ -1238,6 +1249,30 @@ static bool gic_check_eoimode(struct device_node *node, void __iomem **base) return true; } +static int gic_of_setup(struct gic_chip_data *gic, struct device_node *node) +{ + if (!gic || !node) + return -EINVAL; + + gic->raw_dist_base = of_iomap(node, 0); + if (WARN(!gic->raw_dist_base, "unable to map gic dist registers\n")) + goto error; + + gic->raw_cpu_base = of_iomap(node, 1); + if (WARN(!gic->raw_cpu_base, "unable to map gic cpu registers\n")) + goto error; + + if (of_property_read_u32(node, "cpu-offset", &gic->percpu_offset)) + gic->percpu_offset = 0; + + return 0; + +error: + gic_teardown(gic); + + return -ENOMEM; +} + int __init gic_of_init(struct device_node *node, struct device_node *parent) { @@ -1252,15 +1287,9 @@ gic_of_init(struct device_node *node, struct device_node *parent) gic = &gic_data[gic_cnt]; - gic->raw_dist_base = of_iomap(node, 0); - if (WARN(!gic->raw_dist_base, "unable to map gic dist registers\n")) - return -ENOMEM; - - gic->raw_cpu_base = of_iomap(node, 1); - if (WARN(!gic->raw_cpu_base, "unable to map gic cpu registers\n")) { - iounmap(gic->raw_dist_base); - return -ENOMEM; - } + ret = gic_of_setup(gic, node); + if (ret) + return ret; /* * Disable split EOI/Deactivate if either HYP is not available @@ -1269,13 +1298,9 @@ gic_of_init(struct device_node *node, struct device_node *parent) if (gic_cnt == 0 && !gic_check_eoimode(node, &gic->raw_cpu_base)) static_key_slow_dec(&supports_deactivate); - if (of_property_read_u32(node, "cpu-offset", &gic->percpu_offset)) - gic->percpu_offset = 0; - ret = __gic_init_bases(gic, -1, &node->fwnode); if (ret) { - iounmap(gic->raw_dist_base); - iounmap(gic->raw_cpu_base); + gic_teardown(gic); return ret; } @@ -1388,7 +1413,7 @@ static int __init gic_v2_acpi_init(struct acpi_subtable_header *header, ACPI_GICV2_DIST_MEM_SIZE); if (!gic->raw_dist_base) { pr_err("Unable to map GICD registers\n"); - iounmap(gic->raw_cpu_base); + gic_teardown(gic); return -ENOMEM; } @@ -1406,8 +1431,7 @@ static int __init gic_v2_acpi_init(struct acpi_subtable_header *header, domain_handle = irq_domain_alloc_fwnode(gic->raw_dist_base); if (!domain_handle) { pr_err("Unable to allocate domain handle\n"); - iounmap(gic->raw_cpu_base); - iounmap(gic->raw_dist_base); + gic_teardown(gic); return -ENOMEM; } @@ -1415,8 +1439,7 @@ static int __init gic_v2_acpi_init(struct acpi_subtable_header *header, if (ret) { pr_err("Failed to initialise GIC\n"); irq_domain_free_fwnode(domain_handle); - iounmap(gic->raw_cpu_base); - iounmap(gic->raw_dist_base); + gic_teardown(gic); return ret; }