Merge branch 'common/irqdomain' into sh-latest

12 files changed, 333 insertions, 174 deletions

diff --git a/Documentation/IRQ-domain.txt b/Documentation/IRQ-domain.txt
index 27dcaabfb4db..1401cece745a 100644
--- a/Documentation/IRQ-domain.txt
+++ b/Documentation/IRQ-domain.txt
@@ -93,6 +93,7 @@ Linux IRQ number into the hardware.
 Most drivers cannot use this mapping.
 
 ==== Legacy ====
+irq_domain_add_simple()
 irq_domain_add_legacy()
 irq_domain_add_legacy_isa()
 
@@ -115,3 +116,7 @@ The legacy map should only be used if fixed IRQ mappings must be
 supported.  For example, ISA controllers would use the legacy map for
 mapping Linux IRQs 0-15 so that existing ISA drivers get the correct IRQ
 numbers.
+
+Most users of legacy mappings should use irq_domain_add_simple() which
+will use a legacy domain only if an IRQ range is supplied by the
+system and will otherwise use a linear domain mapping.
diff --git a/arch/powerpc/sysdev/xics/icp-hv.c b/arch/powerpc/sysdev/xics/icp-hv.c
index 253dce98c16e..14469cf9df68 100644
--- a/arch/powerpc/sysdev/xics/icp-hv.c
+++ b/arch/powerpc/sysdev/xics/icp-hv.c
@@ -111,7 +111,7 @@ static unsigned int icp_hv_get_irq(void)
         if (vec == XICS_IRQ_SPURIOUS)
                 return NO_IRQ;
 
-        irq = irq_radix_revmap_lookup(xics_host, vec);
+        irq = irq_find_mapping(xics_host, vec);
         if (likely(irq != NO_IRQ)) {
                 xics_push_cppr(vec);
                 return irq;
diff --git a/arch/powerpc/sysdev/xics/icp-native.c b/arch/powerpc/sysdev/xics/icp-native.c
index 4c79b6fbee1c..48861d3fcd07 100644
--- a/arch/powerpc/sysdev/xics/icp-native.c
+++ b/arch/powerpc/sysdev/xics/icp-native.c
@@ -119,7 +119,7 @@ static unsigned int icp_native_get_irq(void)
         if (vec == XICS_IRQ_SPURIOUS)
                 return NO_IRQ;
 
-        irq = irq_radix_revmap_lookup(xics_host, vec);
+        irq = irq_find_mapping(xics_host, vec);
         if (likely(irq != NO_IRQ)) {
                 xics_push_cppr(vec);
                 return irq;
diff --git a/arch/powerpc/sysdev/xics/xics-common.c b/arch/powerpc/sysdev/xics/xics-common.c
index cd1d18db92c6..9049d9f44485 100644
--- a/arch/powerpc/sysdev/xics/xics-common.c
+++ b/arch/powerpc/sysdev/xics/xics-common.c
@@ -329,9 +329,6 @@ static int xics_host_map(struct irq_domain *h, unsigned int virq,
 
         pr_devel("xics: map virq %d, hwirq 0x%lx\n", virq, hw);
 
-        /* Insert the interrupt mapping into the radix tree for fast lookup */
-        irq_radix_revmap_insert(xics_host, virq, hw);
-
         /* They aren't all level sensitive but we just don't really know */
         irq_set_status_flags(virq, IRQ_LEVEL);
 
diff --git a/drivers/sh/intc/Kconfig b/drivers/sh/intc/Kconfig
index c88cbccc62b0..a305731742a9 100644
--- a/drivers/sh/intc/Kconfig
+++ b/drivers/sh/intc/Kconfig
@@ -1,3 +1,7 @@
+config SH_INTC
+        def_bool y
+        select IRQ_DOMAIN
+
 comment "Interrupt controller options"
 
 config INTC_USERIMASK
diff --git a/drivers/sh/intc/Makefile b/drivers/sh/intc/Makefile
index 44f006d09471..54ec2a0643df 100644
--- a/drivers/sh/intc/Makefile
+++ b/drivers/sh/intc/Makefile
@@ -1,4 +1,4 @@
-obj-y   := access.o chip.o core.o handle.o virq.o
+obj-y   := access.o chip.o core.o handle.o irqdomain.o virq.o
 
 obj-$(CONFIG_INTC_BALANCING)            += balancing.o
 obj-$(CONFIG_INTC_USERIMASK)            += userimask.o
diff --git a/drivers/sh/intc/core.c b/drivers/sh/intc/core.c
index 7e562ccb6997..2374468615ed 100644
--- a/drivers/sh/intc/core.c
+++ b/drivers/sh/intc/core.c
@@ -25,6 +25,7 @@
 #include <linux/stat.h>
 #include <linux/interrupt.h>
 #include <linux/sh_intc.h>
+#include <linux/irqdomain.h>
 #include <linux/device.h>
 #include <linux/syscore_ops.h>
 #include <linux/list.h>
@@ -310,6 +311,8 @@ int __init register_intc_controller(struct intc_desc *desc)
 
         BUG_ON(k > 256); /* _INTC_ADDR_E() and _INTC_ADDR_D() are 8 bits */
 
+        intc_irq_domain_init(d, hw);
+
         /* register the vectors one by one */
         for (i = 0; i < hw->nr_vectors; i++) {
                 struct intc_vect *vect = hw->vectors + i;
@@ -319,8 +322,8 @@ int __init register_intc_controller(struct intc_desc *desc)
                 if (!vect->enum_id)
                         continue;
 
-                res = irq_alloc_desc_at(irq, numa_node_id());
-                if (res != irq && res != -EEXIST) {
+                res = irq_create_identity_mapping(d->domain, irq);
+                if (unlikely(res)) {
                         pr_err("can't get irq_desc for %d\n", irq);
                         continue;
                 }
@@ -340,8 +343,8 @@ int __init register_intc_controller(struct intc_desc *desc)
                          * IRQ support, each vector still needs to have
                          * its own backing irq_desc.
                          */
-                        res = irq_alloc_desc_at(irq2, numa_node_id());
-                        if (res != irq2 && res != -EEXIST) {
+                        res = irq_create_identity_mapping(d->domain, irq2);
+                        if (unlikely(res)) {
                                 pr_err("can't get irq_desc for %d\n", irq2);
                                 continue;
                         }
diff --git a/drivers/sh/intc/internals.h b/drivers/sh/intc/internals.h
index f034a979a16f..7dff08e2a071 100644
--- a/drivers/sh/intc/internals.h
+++ b/drivers/sh/intc/internals.h
@@ -1,5 +1,6 @@
 #include <linux/sh_intc.h>
 #include <linux/irq.h>
+#include <linux/irqdomain.h>
 #include <linux/list.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
@@ -66,6 +67,7 @@ struct intc_desc_int {
         unsigned int nr_sense;
         struct intc_window *window;
         unsigned int nr_windows;
+        struct irq_domain *domain;
         struct irq_chip chip;
         bool skip_suspend;
 };
@@ -187,6 +189,9 @@ unsigned long intc_get_ack_handle(unsigned int irq);
 void intc_enable_disable_enum(struct intc_desc *desc, struct intc_desc_int *d,
                               intc_enum enum_id, int enable);
 
+/* irqdomain.c */
+void intc_irq_domain_init(struct intc_desc_int *d, struct intc_hw_desc *hw);
+
 /* virq.c */
 void intc_subgroup_init(struct intc_desc *desc, struct intc_desc_int *d);
 void intc_irq_xlate_set(unsigned int irq, intc_enum id, struct intc_desc_int *d);
diff --git a/drivers/sh/intc/irqdomain.c b/drivers/sh/intc/irqdomain.c
new file mode 100644
index 000000000000..3968f1c3c5c3
--- /dev/null
+++ b/drivers/sh/intc/irqdomain.c
@@ -0,0 +1,68 @@