2 files changed, 58 insertions, 1 deletions

diff --git a/include/linux/irq.h b/include/linux/irq.h
index bc4e06611958..298a9b9ce675 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -119,6 +119,7 @@ struct irq_domain;
 
 /**
  * struct irq_data - per irq and irq chip data passed down to chip functions
+ * @mask:               precomputed bitmask for accessing the chip registers
  * @irq:                interrupt number
  * @hwirq:              hardware interrupt number, local to the interrupt domain
  * @node:               node index useful for balancing
@@ -138,6 +139,7 @@ struct irq_domain;
  * irq_data.
  */
 struct irq_data {
+        u32                     mask;
         unsigned int            irq;
         unsigned long           hwirq;
         unsigned int            node;
@@ -294,6 +296,7 @@ static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
  * @irq_suspend:        function called from core code on suspend once per chip
  * @irq_resume:         function called from core code on resume once per chip
  * @irq_pm_shutdown:    function called from core code on shutdown once per chip
+ * @irq_calc_mask:      Optional function to set irq_data.mask for special cases
  * @irq_print_chip:     optional to print special chip info in show_interrupts
  * @flags:              chip specific flags
  */
@@ -325,6 +328,8 @@ struct irq_chip {
         void            (*irq_resume)(struct irq_data *data);
         void            (*irq_pm_shutdown)(struct irq_data *data);
 
+        void            (*irq_calc_mask)(struct irq_data *data);
+
         void            (*irq_print_chip)(struct irq_data *data, struct seq_file *p);
 
         unsigned long   flags;
@@ -644,6 +649,8 @@ struct irq_chip_regs {
  * @regs:               Register offsets for this chip
  * @handler:            Flow handler associated with this chip
  * @type:               Chip can handle these flow types
+ * @mask_cache_priv:    Cached mask register private to the chip type
+ * @mask_cache:         Pointer to cached mask register
  *
  * A irq_generic_chip can have several instances of irq_chip_type when
  * it requires different functions and register offsets for different
@@ -654,6 +661,8 @@ struct irq_chip_type {
         struct irq_chip_regs    regs;
         irq_flow_handler_t      handler;
         u32                     type;
+        u32                     mask_cache_priv;
+        u32                     *mask_cache;
 };
 
 /**
@@ -662,13 +671,16 @@ struct irq_chip_type {
  * @reg_base:           Register base address (virtual)
  * @irq_base:           Interrupt base nr for this chip
  * @irq_cnt:            Number of interrupts handled by this chip
- * @mask_cache:         Cached mask register
+ * @mask_cache:         Cached mask register shared between all chip types
  * @type_cache:         Cached type register
  * @polarity_cache:     Cached polarity register
  * @wake_enabled:       Interrupt can wakeup from suspend
  * @wake_active:        Interrupt is marked as an wakeup from suspend source
  * @num_ct:             Number of available irq_chip_type instances (usually 1)
  * @private:            Private data for non generic chip callbacks
+ * @installed:          bitfield to denote installed interrupts
+ * @unused:             bitfield to denote unused interrupts
+ * @domain:             irq domain pointer
  * @list:               List head for keeping track of instances
  * @chip_types:         Array of interrupt irq_chip_types
  *
@@ -690,6 +702,9 @@ struct irq_chip_generic {
         u32                     wake_active;
         unsigned int            num_ct;
         void                    *private;
+        unsigned long           installed;
+        unsigned long           unused;
+        struct irq_domain       *domain;
         struct list_head        list;
         struct irq_chip_type    chip_types[0];
 };
@@ -700,10 +715,32 @@ struct irq_chip_generic {
  * @IRQ_GC_INIT_NESTED_LOCK:    Set the lock class of the irqs to nested for
  *                              irq chips which need to call irq_set_wake() on
  *                              the parent irq. Usually GPIO implementations
+ * @IRQ_GC_MASK_CACHE_PER_TYPE: Mask cache is chip type private
+ * @IRQ_GC_NO_MASK:             Do not calculate irq_data->mask
  */
 enum irq_gc_flags {
         IRQ_GC_INIT_MASK_CACHE          = 1 << 0,
         IRQ_GC_INIT_NESTED_LOCK         = 1 << 1,
+        IRQ_GC_MASK_CACHE_PER_TYPE      = 1 << 2,
+        IRQ_GC_NO_MASK                  = 1 << 3,
+};
+
+/*
+ * struct irq_domain_chip_generic - Generic irq chip data structure for irq domains
+ * @irqs_per_chip:      Number of interrupts per chip
+ * @num_chips:          Number of chips
+ * @irq_flags_to_set:   IRQ* flags to set on irq setup
+ * @irq_flags_to_clear: IRQ* flags to clear on irq setup
+ * @gc_flags:           Generic chip specific setup flags
+ * @gc:                 Array of pointers to generic interrupt chips
+ */
+struct irq_domain_chip_generic {
+        unsigned int            irqs_per_chip;
+        unsigned int            num_chips;
+        unsigned int            irq_flags_to_clear;
+        unsigned int            irq_flags_to_set;
+        enum irq_gc_flags       gc_flags;
+        struct irq_chip_generic *gc[0];
 };
 
 /* Generic chip callback functions */
@@ -729,6 +766,14 @@ int irq_setup_alt_chip(struct irq_data *d, unsigned int type);
 void irq_remove_generic_chip(struct irq_chip_generic *gc, u32 msk,
                              unsigned int clr, unsigned int set);
 
+struct irq_chip_generic *irq_get_domain_generic_chip(struct irq_domain *d, unsigned int hw_irq);
+int irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip,
+                                   int num_ct, const char *name,
+                                   irq_flow_handler_t handler,
+                                   unsigned int clr, unsigned int set,
+                                   enum irq_gc_flags flags);
+
+
 static inline struct irq_chip_type *irq_data_get_chip_type(struct irq_data *d)
 {
         return container_of(d->chip, struct irq_chip_type, chip);
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 0d5b17bf5e51..ba2c708adcff 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -66,6 +66,10 @@ struct irq_domain_ops {
                      unsigned long *out_hwirq, unsigned int *out_type);
 };
 
+extern struct irq_domain_ops irq_generic_chip_ops;
+
+struct irq_domain_chip_generic;
+
 /**
  * struct irq_domain - Hardware interrupt number translation object
  * @link: Element in global irq_domain list.
@@ -109,8 +113,16 @@ struct irq_domain {
 
         /* Optional device node pointer */
         struct device_node *of_node;
+        /* Optional pointer to generic interrupt chips */
+        struct irq_domain_chip_generic *gc;
 };
 
+#define IRQ_DOMAIN_MAP_LEGACY 0 /* driver allocated fixed range of irqs.
+                                 * ie. legacy 8259, gets irqs 1..15 */
+#define IRQ_DOMAIN_MAP_NOMAP 1 /* no fast reverse mapping */
+#define IRQ_DOMAIN_MAP_LINEAR 2 /* linear map of interrupts */
+#define IRQ_DOMAIN_MAP_TREE 3 /* radix tree */
+
 #ifdef CONFIG_IRQ_DOMAIN
 struct irq_domain *irq_domain_add_simple(struct device_node *of_node,
                                          unsigned int size,