From 088f40b7b027dad6519712ff224a5798dd62a204 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 6 May 2013 14:30:27 +0000 Subject: genirq: Generic chip: Add linear irq domain support Provide infrastructure for irq chip implementations which work on linear irq domains. - Interface to allocate multiple generic chips which are associated to the irq domain. - Interface to get the generic chip pointer for a particular hardware interrupt in the domain. - irq domain mapping function to install the chip for a particular interrupt. Note: This lacks a removal function for now. [ Sebastian Hesselbarth: Mask cache and pointer math fixups ] Signed-off-by: Thomas Gleixner Cc: Thomas Petazzoni Cc: Andrew Lunn Cc: Russell King - ARM Linux Cc: Jason Cooper Cc: Arnd Bergmann Cc: Jean-Francois Moine Cc: devicetree-discuss@lists.ozlabs.org Cc: Rob Herring Cc: Jason Gunthorpe Cc: Gregory Clement Cc: Gerlando Falauto Cc: Rob Landley Acked-by: Grant Likely Cc: Maxime Ripard Cc: Ezequiel Garcia Cc: linux-arm-kernel@lists.infradead.org Cc: Sebastian Hesselbarth Link: http://lkml.kernel.org/r/20130506142539.450634298@linutronix.de Signed-off-by: Thomas Gleixner --- include/linux/irqdomain.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'include/linux/irqdomain.h') 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, -- cgit v1.2.3 From 9bbf877d3b6b8c5991000296f40a3f0fe66fa89b Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Thu, 6 Jun 2013 12:10:24 +0100 Subject: irqdomain: Replace LEGACY mapping with LINEAR The LEGACY mapping unnecessarily complicates the irqdomain code and can easily be implemented with a linear mapping. By ripping it out and replacing it with the LINEAR mapping the object size of irqdomain.c shrinks by about 330 bytes (ARMv7) which offsets the additional allocation required by the linear map. It also makes it possible for current LEGACY map users to pre-allocate irq_descs for a subset of the hwirqs and dynamically allocate the rest as needed. Signed-off-by: Grant Likely Cc: Paul Mundt Cc: Benjamin Herrenschmidt Cc: Thomas Gleixner Cc: Rob Herring --- include/linux/irqdomain.h | 7 ------- 1 file changed, 7 deletions(-) (limited to 'include/linux/irqdomain.h') diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index ba2c708adcff..6f062416e5bf 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -93,11 +93,6 @@ struct irq_domain { /* type of reverse mapping_technique */ unsigned int revmap_type; union { - struct { - unsigned int size; - unsigned int first_irq; - irq_hw_number_t first_hwirq; - } legacy; struct { unsigned int size; unsigned int *revmap; @@ -117,8 +112,6 @@ struct irq_domain { 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 */ -- cgit v1.2.3 From 0bb4afb45dd1add73ca643a865daa38716aeff0c Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Thu, 6 Jun 2013 14:23:30 +0100 Subject: irqdomain: Add a name field This patch adds a name field to the irq_domain structure to help mere mortals understand the mappings between irq domains and virqs. It also converts a number of places that have open-coded some kind of fudging an irqdomain name to use the new field. This means a more consistent display of names in irq domain log messages and debugfs output. Signed-off-by: Grant Likely --- include/linux/irqdomain.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/irqdomain.h') diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index 6f062416e5bf..e5e513c2d104 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -89,6 +89,7 @@ struct irq_domain_chip_generic; */ struct irq_domain { struct list_head link; + const char *name; /* type of reverse mapping_technique */ unsigned int revmap_type; -- cgit v1.2.3 From cef5075c8c238ffd04c86a77a5a9bdbd18031137 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Wed, 11 Jul 2012 17:24:31 +0100 Subject: irqdomain: merge linear and tree reverse mappings. Keeping them separate makes irq_domain more complex and adds a lot of code (as proven by the diffstat). Merging them simplifies the whole scheme. This change makes it so both the tree and linear methods can be used by the same irq_domain instance. If the hwirq is less than the ->linear_size, then the linear map is used to reverse map the hwirq. Otherwise the radix tree is used. The test for which map to use is no more expensive that the existing code, so the performance of fast path is preserved. It also means that complex interrupt controllers can use both the linear map and a tree in the same domain. This may be useful for an interrupt controller with a base set of core irqs and a large number of GPIOs which might be used as irqs. The linear map could cover the core irqs, and the tree used for thas irqs. The linear map could cover the core irqs, and the tree used for the gpios. v2: Drop reorganization of revmap data Signed-off-by: Grant Likely Cc: Paul Mundt Cc: Benjamin Herrenschmidt Cc: Thomas Gleixner Cc: Rob Herring --- include/linux/irqdomain.h | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) (limited to 'include/linux/irqdomain.h') diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index e5e513c2d104..1cbb7413c121 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -75,7 +75,6 @@ struct irq_domain_chip_generic; * @link: Element in global irq_domain list. * @revmap_type: Method used for reverse mapping hwirq numbers to linux irq. This * will be one of the IRQ_DOMAIN_MAP_* values. - * @revmap_data: Revmap method specific data. * @ops: pointer to irq_domain methods * @host_data: private data pointer for use by owner. Not touched by irq_domain * core code. @@ -93,10 +92,9 @@ struct irq_domain { /* type of reverse mapping_technique */ unsigned int revmap_type; - union { + struct { struct { unsigned int size; - unsigned int *revmap; } linear; struct { unsigned int max_irq; @@ -111,11 +109,13 @@ struct irq_domain { struct device_node *of_node; /* Optional pointer to generic interrupt chips */ struct irq_domain_chip_generic *gc; + + /* Linear reverse map */ + unsigned int linear_revmap[]; }; #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, @@ -137,10 +137,6 @@ struct irq_domain *irq_domain_add_nomap(struct device_node *of_node, unsigned int max_irq, const struct irq_domain_ops *ops, void *host_data); -struct irq_domain *irq_domain_add_tree(struct device_node *of_node, - const struct irq_domain_ops *ops, - void *host_data); - extern struct irq_domain *irq_find_host(struct device_node *node); extern void irq_set_default_host(struct irq_domain *host); @@ -152,6 +148,12 @@ static inline struct irq_domain *irq_domain_add_legacy_isa( return irq_domain_add_legacy(of_node, NUM_ISA_INTERRUPTS, 0, 0, ops, host_data); } +static inline struct irq_domain *irq_domain_add_tree(struct device_node *of_node, + const struct irq_domain_ops *ops, + void *host_data) +{ + return irq_domain_add_linear(of_node, 0, ops, host_data); +} extern void irq_domain_remove(struct irq_domain *host); -- cgit v1.2.3 From 1aa0dd94ca07df818cf14588c9031ab1d7fd84d3 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Sat, 8 Jun 2013 12:03:59 +0100 Subject: irqdomain: Eliminate revmap type The NOMAP irq_domain type is only used by a handful of interrupt controllers and it unnecessarily complicates the code by adding special cases on how to look up mappings and different revmap functions are used for each type which need to validate the correct type is passed to it before performing the reverse map. Eliminating the revmap_type and making a single reverse mapping function simplifies the code. It also shouldn't be any slower than having separate revmap functions because the type of the revmap needed to be checked anyway. The linear and tree revmap types were already merged in a previous patch. This patch rolls the NOMAP or direct mapping behaviour into the same domain code making is possible for an irq domain to do any mapping type; linear, tree or direct; and that the mapping will be transparent to the interrupt controller driver. With this change, direct mappings will get stored in the linear or tree mapping for consistency. Reverse mapping from the hwirq to virq will go through the normal lookup process. However, any controller using a direct mapping can take advantage of knowing that hwirq==virq for any mapped interrupts skip doing a revmap lookup when handling IRQs. Signed-off-by: Grant Likely --- include/linux/irqdomain.h | 48 ++++++++++++++++++++--------------------------- 1 file changed, 20 insertions(+), 28 deletions(-) (limited to 'include/linux/irqdomain.h') diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index 1cbb7413c121..51ef84a3c990 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -73,50 +73,42 @@ struct irq_domain_chip_generic; /** * struct irq_domain - Hardware interrupt number translation object * @link: Element in global irq_domain list. - * @revmap_type: Method used for reverse mapping hwirq numbers to linux irq. This - * will be one of the IRQ_DOMAIN_MAP_* values. + * @name: Name of interrupt domain * @ops: pointer to irq_domain methods * @host_data: private data pointer for use by owner. Not touched by irq_domain * core code. - * @irq_base: Start of irq_desc range assigned to the irq_domain. The creator - * of the irq_domain is responsible for allocating the array of - * irq_desc structures. - * @nr_irq: Number of irqs managed by the irq domain - * @hwirq_base: Starting number for hwirqs managed by the irq domain - * @of_node: (optional) Pointer to device tree nodes associated with the - * irq_domain. Used when decoding device tree interrupt specifiers. + * + * Optional elements + * @of_node: Pointer to device tree nodes associated with the irq_domain. Used + * when decoding device tree interrupt specifiers. + * @gc: Pointer to a list of generic chips. There is a helper function for + * setting up one or more generic chips for interrupt controllers + * drivers using the generic chip library which uses this pointer. + * + * Revmap data, used internally by irq_domain + * @revmap_direct_max_irq: The largest hwirq that can be set for controllers that + * support direct mapping + * @revmap_size: Size of the linear map table @linear_revmap[] + * @revmap_tree: Radix map tree for hwirqs that don't fit in the linear map + * @linear_revmap: Linear table of hwirq->virq reverse mappings */ struct irq_domain { struct list_head link; const char *name; - - /* type of reverse mapping_technique */ - unsigned int revmap_type; - struct { - struct { - unsigned int size; - } linear; - struct { - unsigned int max_irq; - } nomap; - struct radix_tree_root tree; - } revmap_data; const struct irq_domain_ops *ops; void *host_data; - irq_hw_number_t inval_irq; - /* Optional device node pointer */ + /* Optional data */ struct device_node *of_node; - /* Optional pointer to generic interrupt chips */ struct irq_domain_chip_generic *gc; - /* Linear reverse map */ + /* reverse map data. The linear map gets appended to the irq_domain */ + unsigned int revmap_direct_max_irq; + unsigned int revmap_size; + struct radix_tree_root revmap_tree; unsigned int linear_revmap[]; }; -#define IRQ_DOMAIN_MAP_NOMAP 1 /* no fast reverse mapping */ -#define IRQ_DOMAIN_MAP_LINEAR 2 /* linear map of interrupts */ - #ifdef CONFIG_IRQ_DOMAIN struct irq_domain *irq_domain_add_simple(struct device_node *of_node, unsigned int size, -- cgit v1.2.3 From fa40f377577752b83252b9d2b3165d4acee0eb7c Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Sat, 8 Jun 2013 12:57:40 +0100 Subject: irqdomain: Clean up aftermath of irq_domain refactoring After refactoring the irqdomain code, there are a number of API functions that are merely empty wrappers around core code. Drop those wrappers out of the C file and replace them with static inlines in the header. Signed-off-by: Grant Likely --- include/linux/irqdomain.h | 31 ++++++++++++++++++++++++------- 1 file changed, 24 insertions(+), 7 deletions(-) (limited to 'include/linux/irqdomain.h') diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index 51ef84a3c990..fd4b26f8f44c 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -110,6 +110,10 @@ struct irq_domain { }; #ifdef CONFIG_IRQ_DOMAIN +struct irq_domain *__irq_domain_add(struct device_node *of_node, + int size, int direct_max, + const struct irq_domain_ops *ops, + void *host_data); struct irq_domain *irq_domain_add_simple(struct device_node *of_node, unsigned int size, unsigned int first_irq, @@ -121,17 +125,30 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node, irq_hw_number_t first_hwirq, const struct irq_domain_ops *ops, void *host_data); -struct irq_domain *irq_domain_add_linear(struct device_node *of_node, +extern struct irq_domain *irq_find_host(struct device_node *node); +extern void irq_set_default_host(struct irq_domain *host); + +/** + * irq_domain_add_linear() - Allocate and register a linear revmap irq_domain. + * @of_node: pointer to interrupt controller's device tree node. + * @size: Number of interrupts in the domain. + * @ops: map/unmap domain callbacks + * @host_data: Controller private data pointer + */ +static inline struct irq_domain *irq_domain_add_linear(struct device_node *of_node, unsigned int size, const struct irq_domain_ops *ops, - void *host_data); -struct irq_domain *irq_domain_add_nomap(struct device_node *of_node, + void *host_data) +{ + return __irq_domain_add(of_node, size, 0, ops, host_data); +} +static inline struct irq_domain *irq_domain_add_nomap(struct device_node *of_node, unsigned int max_irq, const struct irq_domain_ops *ops, - void *host_data); -extern struct irq_domain *irq_find_host(struct device_node *node); -extern void irq_set_default_host(struct irq_domain *host); - + void *host_data) +{ + return __irq_domain_add(of_node, 0, max_irq, ops, host_data); +} static inline struct irq_domain *irq_domain_add_legacy_isa( struct device_node *of_node, const struct irq_domain_ops *ops, -- cgit v1.2.3 From ddaf144c61da45ae5c49ae38556c3ac4524f9318 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Mon, 10 Jun 2013 01:06:02 +0100 Subject: irqdomain: Refactor irq_domain_associate_many() Originally, irq_domain_associate_many() was designed to unwind the mapped irqs on a failure of any individual association. However, that proved to be a problem with certain IRQ controllers. Some of them only support a subset of irqs, and will fail when attempting to map a reserved IRQ. In those cases we want to map as many IRQs as possible, so instead it is better for irq_domain_associate_many() to make a best-effort attempt to map irqs, but not fail if any or all of them don't succeed. If a caller really cares about how many irqs got associated, then it should instead go back and check that all of the irqs is cares about were mapped. The original design open-coded the individual association code into the body of irq_domain_associate_many(), but with no longer needing to unwind associations, the code becomes simpler to split out irq_domain_associate() to contain the bulk of the logic, and irq_domain_associate_many() to be a simple loop wrapper. This patch also adds a new error check to the associate path to make sure it isn't called for an irq larger than the controller can handle, and adds locking so that the irq_domain_mutex is held while setting up a new association. v3: Fixup missing change to irq_domain_add_tree() v2: Fixup x86 warning. irq_domain_associate_many() no longer returns an error code, but reports errors to the printk log directly. In the majority of cases we don't actually want to fail if there is a problem, but rather log it and still try to boot the system. Signed-off-by: Grant Likely irqdomain: Fix flubbed irq_domain_associate_many refactoring commit d39046ec72, "irqdomain: Refactor irq_domain_associate_many()" was missing the following hunk which causes a boot failure on anything using irq_domain_add_tree() to allocate an irq domain. Signed-off-by: Grant Likely Cc: Michael Neuling Cc: Benjamin Herrenschmidt , Cc: Thomas Gleixner , Cc: Stephen Rothwell --- include/linux/irqdomain.h | 24 +++++++++++------------- 1 file changed, 11 insertions(+), 13 deletions(-) (limited to 'include/linux/irqdomain.h') diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index fd4b26f8f44c..208d1352c40a 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -103,6 +103,7 @@ struct irq_domain { struct irq_domain_chip_generic *gc; /* reverse map data. The linear map gets appended to the irq_domain */ + irq_hw_number_t hwirq_max; unsigned int revmap_direct_max_irq; unsigned int revmap_size; struct radix_tree_root revmap_tree; @@ -110,8 +111,8 @@ struct irq_domain { }; #ifdef CONFIG_IRQ_DOMAIN -struct irq_domain *__irq_domain_add(struct device_node *of_node, - int size, int direct_max, +struct irq_domain *__irq_domain_add(struct device_node *of_node, int size, + irq_hw_number_t hwirq_max, int direct_max, const struct irq_domain_ops *ops, void *host_data); struct irq_domain *irq_domain_add_simple(struct device_node *of_node, @@ -140,14 +141,14 @@ static inline struct irq_domain *irq_domain_add_linear(struct device_node *of_no const struct irq_domain_ops *ops, void *host_data) { - return __irq_domain_add(of_node, size, 0, ops, host_data); + return __irq_domain_add(of_node, size, size, 0, ops, host_data); } static inline struct irq_domain *irq_domain_add_nomap(struct device_node *of_node, unsigned int max_irq, const struct irq_domain_ops *ops, void *host_data) { - return __irq_domain_add(of_node, 0, max_irq, ops, host_data); + return __irq_domain_add(of_node, 0, max_irq, max_irq, ops, host_data); } static inline struct irq_domain *irq_domain_add_legacy_isa( struct device_node *of_node, @@ -161,19 +162,16 @@ static inline struct irq_domain *irq_domain_add_tree(struct device_node *of_node const struct irq_domain_ops *ops, void *host_data) { - return irq_domain_add_linear(of_node, 0, ops, host_data); + return __irq_domain_add(of_node, 0, ~0, 0, ops, host_data); } 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 int irq_domain_associate(struct irq_domain *domain, unsigned int irq, + irq_hw_number_t hwirq); +extern void irq_domain_associate_many(struct irq_domain *domain, + unsigned int irq_base, + irq_hw_number_t hwirq_base, int count); extern unsigned int irq_create_mapping(struct irq_domain *host, irq_hw_number_t hwirq); -- cgit v1.2.3 From 56a3d5ac774d054ece9373277a861338a468a294 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Mon, 10 Jun 2013 01:09:33 +0100 Subject: irqdomain: remove irq_domain_generate_simple() Nobody calls it; remove the function Signed-off-by: Grant Likely --- include/linux/irqdomain.h | 8 -------- 1 file changed, 8 deletions(-) (limited to 'include/linux/irqdomain.h') diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index 208d1352c40a..6efbeccac56c 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -205,14 +205,6 @@ int irq_domain_xlate_onetwocell(struct irq_domain *d, struct device_node *ctrlr, const u32 *intspec, unsigned int intsize, irq_hw_number_t *out_hwirq, unsigned int *out_type); -#if defined(CONFIG_OF_IRQ) -extern void irq_domain_generate_simple(const struct of_device_id *match, - u64 phys_base, unsigned int irq_start); -#else /* CONFIG_OF_IRQ */ -static inline void irq_domain_generate_simple(const struct of_device_id *match, - u64 phys_base, unsigned int irq_start) { } -#endif /* !CONFIG_OF_IRQ */ - #else /* CONFIG_IRQ_DOMAIN */ static inline void irq_dispose_mapping(unsigned int virq) { } #endif /* !CONFIG_IRQ_DOMAIN */ -- cgit v1.2.3 From d3dcb436f61593843af178d4a520c8c43c04d3fc Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Mon, 10 Jun 2013 12:19:17 +0100 Subject: irqdomain: make irq_linear_revmap() a fast path again Over the years, irq_linear_revmap() gained tests and checks to make sure callers were using it safely, which while important, also make it less of a fast path. After the irqdomain refactoring done recently, it is now possible to make irq_linear_revmap() a fast path again. This patch moves irq_linear_revmap() to the header file and makes it a static inline so that interrupt controller drivers using a linear mapping can decode the virq from a hwirq in just a couple of instructions. Signed-off-by: Grant Likely --- include/linux/irqdomain.h | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) (limited to 'include/linux/irqdomain.h') diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index 6efbeccac56c..c983ed18c332 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -176,6 +176,22 @@ extern void irq_domain_associate_many(struct irq_domain *domain, extern unsigned int irq_create_mapping(struct irq_domain *host, irq_hw_number_t hwirq); extern void irq_dispose_mapping(unsigned int virq); + +/** + * irq_linear_revmap() - Find a linux irq from a hw irq number. + * @domain: domain owning this hardware interrupt + * @hwirq: hardware irq number in that domain space + * + * This is a fast path alternative to irq_find_mapping() that can be + * called directly by irq controller code to save a handful of + * instructions. It is always safe to call, but won't find irqs mapped + * using the radix tree. + */ +static inline unsigned int irq_linear_revmap(struct irq_domain *domain, + irq_hw_number_t hwirq) +{ + return hwirq < domain->revmap_size ? domain->linear_revmap[hwirq] : 0; +} 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); @@ -189,9 +205,6 @@ static inline int irq_create_identity_mapping(struct irq_domain *host, return irq_create_strict_mappings(host, hwirq, hwirq, 1); } -extern unsigned int irq_linear_revmap(struct irq_domain *host, - irq_hw_number_t hwirq); - extern const struct irq_domain_ops irq_domain_simple_ops; /* stock xlate functions */ -- cgit v1.2.3