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Merge branch 'common/irqdomain' into sh-latest

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2 parents 1ca8fe3 + 1d6a21b commit f38770477a30d03b6296570071ca2fcd6d3a5f11 Paul Mundt committed Aug 1, 2012
@@ -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.
@@ -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;
@@ -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;
@@ -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);
View
@@ -1,3 +1,7 @@
+config SH_INTC
+ def_bool y
+ select IRQ_DOMAIN
+
comment "Interrupt controller options"
config INTC_USERIMASK
View
@@ -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
View
@@ -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;
}
@@ -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);
@@ -0,0 +1,68 @@
+/*
+ * IRQ domain support for SH INTC subsystem
+ *
+ * Copyright (C) 2012 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#define pr_fmt(fmt) "intc: " fmt
+
+#include <linux/irqdomain.h>
+#include <linux/sh_intc.h>
+#include <linux/export.h>
+#include "internals.h"
+
+/**
+ * intc_irq_domain_evt_xlate() - Generic xlate for vectored IRQs.
+ *
+ * This takes care of exception vector to hwirq translation through
+ * by way of evt2irq() translation.
+ *
+ * Note: For platforms that use a flat vector space without INTEVT this
+ * basically just mimics irq_domain_xlate_onecell() by way of a nopped
+ * out evt2irq() implementation.
+ */
+static int intc_evt_xlate(struct irq_domain *d, struct device_node *ctrlr,
+ const u32 *intspec, unsigned int intsize,
+ unsigned long *out_hwirq, unsigned int *out_type)
+{
+ if (WARN_ON(intsize < 1))
+ return -EINVAL;
+
+ *out_hwirq = evt2irq(intspec[0]);
+ *out_type = IRQ_TYPE_NONE;
+
+ return 0;
+}
+
+static const struct irq_domain_ops intc_evt_ops = {
+ .xlate = intc_evt_xlate,
+};
+
+void __init intc_irq_domain_init(struct intc_desc_int *d,
+ struct intc_hw_desc *hw)
+{
+ unsigned int irq_base, irq_end;
+
+ /*
+ * Quick linear revmap check
+ */
+ irq_base = evt2irq(hw->vectors[0].vect);
+ irq_end = evt2irq(hw->vectors[hw->nr_vectors - 1].vect);
+
+ /*
+ * Linear domains have a hard-wired assertion that IRQs start at
+ * 0 in order to make some performance optimizations. Lamely
+ * restrict the linear case to these conditions here, taking the
+ * tree penalty for linear cases with non-zero hwirq bases.
+ */
+ if (irq_base == 0 && irq_end == (irq_base + hw->nr_vectors - 1))
+ d->domain = irq_domain_add_linear(NULL, hw->nr_vectors,
+ &intc_evt_ops, NULL);
+ else
+ d->domain = irq_domain_add_tree(NULL, &intc_evt_ops, NULL);
+
+ BUG_ON(!d->domain);
+}
View
@@ -112,6 +112,11 @@ struct irq_domain {
};
#ifdef CONFIG_IRQ_DOMAIN
+struct irq_domain *irq_domain_add_simple(struct device_node *of_node,
+ unsigned int size,
+ unsigned int first_irq,
+ const struct irq_domain_ops *ops,
+ void *host_data);
struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
unsigned int size,
unsigned int first_irq,
@@ -144,16 +149,31 @@ static inline struct irq_domain *irq_domain_add_legacy_isa(
extern void irq_domain_remove(struct irq_domain *host);
+extern int irq_domain_associate_many(struct irq_domain *domain,
+ unsigned int irq_base,
+ irq_hw_number_t hwirq_base, int count);
+static inline int irq_domain_associate(struct irq_domain *domain, unsigned int irq,
+ irq_hw_number_t hwirq)
+{
+ return irq_domain_associate_many(domain, irq, hwirq, 1);
+}
+
extern unsigned int irq_create_mapping(struct irq_domain *host,
irq_hw_number_t hwirq);
extern void irq_dispose_mapping(unsigned int virq);
extern unsigned int irq_find_mapping(struct irq_domain *host,
irq_hw_number_t hwirq);
extern unsigned int irq_create_direct_mapping(struct irq_domain *host);
-extern void irq_radix_revmap_insert(struct irq_domain *host, unsigned int virq,
- irq_hw_number_t hwirq);
-extern unsigned int irq_radix_revmap_lookup(struct irq_domain *host,
- irq_hw_number_t hwirq);
+extern int irq_create_strict_mappings(struct irq_domain *domain,
+ unsigned int irq_base,
+ irq_hw_number_t hwirq_base, int count);
+
+static inline int irq_create_identity_mapping(struct irq_domain *host,
+ irq_hw_number_t hwirq)
+{
+ return irq_create_strict_mappings(host, hwirq, hwirq, 1);
+}
+
extern unsigned int irq_linear_revmap(struct irq_domain *host,
irq_hw_number_t hwirq);
View
@@ -21,6 +21,7 @@
#include <linux/kref.h>
#include <linux/mod_devicetable.h>
#include <linux/spinlock.h>
+#include <linux/topology.h>
#include <asm/byteorder.h>
#include <asm/errno.h>
@@ -158,11 +159,6 @@ static inline unsigned long of_read_ulong(const __be32 *cell, int size)
#define OF_BAD_ADDR ((u64)-1)
-#ifndef of_node_to_nid
-static inline int of_node_to_nid(struct device_node *np) { return -1; }
-#define of_node_to_nid of_node_to_nid
-#endif
-
static inline const char* of_node_full_name(struct device_node *np)
{
return np ? np->full_name : "<no-node>";
@@ -427,6 +423,15 @@ static inline int of_machine_is_compatible(const char *compat)
while (0)
#endif /* CONFIG_OF */
+#ifndef of_node_to_nid
+static inline int of_node_to_nid(struct device_node *np)
+{
+ return numa_node_id();
+}
+
+#define of_node_to_nid of_node_to_nid
+#endif
+
/**
* of_property_read_bool - Findfrom a property
* @np: device node from which the property value is to be read.
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