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authorJiang Liu <jiang.liu@linux.intel.com>2014-06-09 16:19:57 +0800
committerThomas Gleixner <tglx@linutronix.de>2014-06-21 23:05:43 +0200
commitfacd8fdb25fc4d041a283446cfb040cbfe2c3723 (patch)
tree090f50218fca1de695eb7ebdf8ce5894971d8691 /arch/x86/kernel/devicetree.c
parent1b5d3e00d45e093fa0551c588034c3355b362f66 (diff)
downloadlinux-facd8fdb25fc4d041a283446cfb040cbfe2c3723.tar.gz
x86, devicetree, irq: Use common mechanism to support irqdomain
Now the ioapic driver provides a common interface to create irqdomain, so replace the private implementation. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Grant Likely <grant.likely@linaro.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Tony Lindgren <tony@atomide.com> Link: http://lkml.kernel.org/r/1402302011-23642-29-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/devicetree.c')
-rw-r--r--arch/x86/kernel/devicetree.c191
1 files changed, 59 insertions, 132 deletions
diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index d2c53feacd7..ee26feca93d 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -166,82 +166,6 @@ static void __init dtb_lapic_setup(void)
#ifdef CONFIG_X86_IO_APIC
static unsigned int ioapic_id;
-static void __init dtb_add_ioapic(struct device_node *dn)
-{
- struct resource r;
- int ret;
-
- ret = of_address_to_resource(dn, 0, &r);
- if (ret) {
- printk(KERN_ERR "Can't obtain address from node %s.\n",
- dn->full_name);
- return;
- }
- mp_register_ioapic(++ioapic_id, r.start, gsi_top, NULL);
-}
-
-static void __init dtb_ioapic_setup(void)
-{
- struct device_node *dn;
-
- for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
- dtb_add_ioapic(dn);
-
- if (nr_ioapics) {
- of_ioapic = 1;
- return;
- }
- printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
-}
-#else
-static void __init dtb_ioapic_setup(void) {}
-#endif
-
-static void __init dtb_apic_setup(void)
-{
- dtb_lapic_setup();
- dtb_ioapic_setup();
-}
-
-#ifdef CONFIG_OF_FLATTREE
-static void __init x86_flattree_get_config(void)
-{
- u32 size, map_len;
- void *dt;
-
- if (!initial_dtb)
- return;
-
- map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
-
- initial_boot_params = dt = early_memremap(initial_dtb, map_len);
- size = of_get_flat_dt_size();
- if (map_len < size) {
- early_iounmap(dt, map_len);
- initial_boot_params = dt = early_memremap(initial_dtb, size);
- map_len = size;
- }
-
- unflatten_and_copy_device_tree();
- early_iounmap(dt, map_len);
-}
-#else
-static inline void x86_flattree_get_config(void) { }
-#endif
-
-void __init x86_dtb_init(void)
-{
- x86_flattree_get_config();
-
- if (!of_have_populated_dt())
- return;
-
- dtb_setup_hpet();
- dtb_apic_setup();
-}
-
-#ifdef CONFIG_X86_IO_APIC
-
struct of_ioapic_type {
u32 out_type;
u32 trigger;
@@ -292,7 +216,7 @@ static int ioapic_xlate(struct irq_domain *domain,
it = &of_ioapic_type[intspec[1]];
- idx = (u32) domain->host_data;
+ idx = (u32)(long)domain->host_data;
set_io_apic_irq_attr(&attr, idx, line, it->trigger, it->polarity);
rc = io_apic_setup_irq_pin_once(irq_find_mapping(domain, line),
@@ -309,78 +233,81 @@ const struct irq_domain_ops ioapic_irq_domain_ops = {
.xlate = ioapic_xlate,
};
-static void dt_add_ioapic_domain(unsigned int ioapic_num,
- struct device_node *np)
+static void __init dtb_add_ioapic(struct device_node *dn)
{
- struct irq_domain *id;
- struct mp_ioapic_gsi *gsi_cfg;
+ struct resource r;
int ret;
- int num, legacy_irqs = nr_legacy_irqs();
-
- gsi_cfg = mp_ioapic_gsi_routing(ioapic_num);
- num = gsi_cfg->gsi_end - gsi_cfg->gsi_base + 1;
-
- id = irq_domain_add_linear(np, num, &ioapic_irq_domain_ops,
- (void *)ioapic_num);
- BUG_ON(!id);
- if (gsi_cfg->gsi_base == 0) {
- /*
- * The first nr_legacy_irqs() irq descs are allocated in
- * early_irq_init() and need just a mapping. The
- * remaining irqs need both. All of them are preallocated
- * and assigned so we can keep the 1:1 mapping which the ioapic
- * is having.
- */
- irq_domain_associate_many(id, 0, 0, legacy_irqs);
-
- if (num > legacy_irqs) {
- ret = irq_create_strict_mappings(id, legacy_irqs,
- legacy_irqs, num - legacy_irqs);
- if (ret)
- pr_err("Error creating mapping for the "
- "remaining IRQs: %d\n", ret);
- }
- irq_set_default_host(id);
- } else {
- ret = irq_create_strict_mappings(id, gsi_cfg->gsi_base, 0, num);
- if (ret)
- pr_err("Error creating IRQ mapping: %d\n", ret);
+ struct ioapic_domain_cfg cfg = {
+ .type = IOAPIC_DOMAIN_DYNAMIC,
+ .ops = &ioapic_irq_domain_ops,
+ .dev = dn,
+ };
+
+ ret = of_address_to_resource(dn, 0, &r);
+ if (ret) {
+ printk(KERN_ERR "Can't obtain address from node %s.\n",
+ dn->full_name);
+ return;
}
+ mp_register_ioapic(++ioapic_id, r.start, gsi_top, &cfg);
}
-static void __init ioapic_add_ofnode(struct device_node *np)
+static void __init dtb_ioapic_setup(void)
{
- struct resource r;
- int i, ret;
+ struct device_node *dn;
- ret = of_address_to_resource(np, 0, &r);
- if (ret) {
- printk(KERN_ERR "Failed to obtain address for %s\n",
- np->full_name);
+ for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
+ dtb_add_ioapic(dn);
+
+ if (nr_ioapics) {
+ of_ioapic = 1;
return;
}
+ printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
+}
+#else
+static void __init dtb_ioapic_setup(void) {}
+#endif
- for (i = 0; i < nr_ioapics; i++) {
- if (r.start == mpc_ioapic_addr(i)) {
- dt_add_ioapic_domain(i, np);
- return;
- }
- }
- printk(KERN_ERR "IOxAPIC at %s is not registered.\n", np->full_name);
+static void __init dtb_apic_setup(void)
+{
+ dtb_lapic_setup();
+ dtb_ioapic_setup();
}
-void __init x86_add_irq_domains(void)
+#ifdef CONFIG_OF_FLATTREE
+static void __init x86_flattree_get_config(void)
{
- struct device_node *dp;
+ u32 size, map_len;
+ void *dt;
- if (!of_have_populated_dt())
+ if (!initial_dtb)
return;
- for_each_node_with_property(dp, "interrupt-controller") {
- if (of_device_is_compatible(dp, "intel,ce4100-ioapic"))
- ioapic_add_ofnode(dp);
+ map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
+
+ initial_boot_params = dt = early_memremap(initial_dtb, map_len);
+ size = of_get_flat_dt_size();
+ if (map_len < size) {
+ early_iounmap(dt, map_len);
+ initial_boot_params = dt = early_memremap(initial_dtb, size);
+ map_len = size;
}
+
+ unflatten_and_copy_device_tree();
+ early_iounmap(dt, map_len);
}
#else
-void __init x86_add_irq_domains(void) { }
+static inline void x86_flattree_get_config(void) { }
#endif
+
+void __init x86_dtb_init(void)
+{
+ x86_flattree_get_config();
+
+ if (!of_have_populated_dt())
+ return;
+
+ dtb_setup_hpet();
+ dtb_apic_setup();
+}