mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 15:26:42 +07:00
30fd8fc5c9
Provide a resource managed variant of irq_setup_generic_chip(). Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-doc@vger.kernel.org Cc: Jonathan Corbet <corbet@lwn.net> Link: http://lkml.kernel.org/r/1496246820-13250-6-git-send-email-brgl@bgdev.pl
287 lines
8.0 KiB
C
287 lines
8.0 KiB
C
#include <linux/module.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/device.h>
|
|
#include <linux/gfp.h>
|
|
#include <linux/irq.h>
|
|
|
|
#include "internals.h"
|
|
|
|
/*
|
|
* Device resource management aware IRQ request/free implementation.
|
|
*/
|
|
struct irq_devres {
|
|
unsigned int irq;
|
|
void *dev_id;
|
|
};
|
|
|
|
static void devm_irq_release(struct device *dev, void *res)
|
|
{
|
|
struct irq_devres *this = res;
|
|
|
|
free_irq(this->irq, this->dev_id);
|
|
}
|
|
|
|
static int devm_irq_match(struct device *dev, void *res, void *data)
|
|
{
|
|
struct irq_devres *this = res, *match = data;
|
|
|
|
return this->irq == match->irq && this->dev_id == match->dev_id;
|
|
}
|
|
|
|
/**
|
|
* devm_request_threaded_irq - allocate an interrupt line for a managed device
|
|
* @dev: device to request interrupt for
|
|
* @irq: Interrupt line to allocate
|
|
* @handler: Function to be called when the IRQ occurs
|
|
* @thread_fn: function to be called in a threaded interrupt context. NULL
|
|
* for devices which handle everything in @handler
|
|
* @irqflags: Interrupt type flags
|
|
* @devname: An ascii name for the claiming device, dev_name(dev) if NULL
|
|
* @dev_id: A cookie passed back to the handler function
|
|
*
|
|
* Except for the extra @dev argument, this function takes the
|
|
* same arguments and performs the same function as
|
|
* request_threaded_irq(). IRQs requested with this function will be
|
|
* automatically freed on driver detach.
|
|
*
|
|
* If an IRQ allocated with this function needs to be freed
|
|
* separately, devm_free_irq() must be used.
|
|
*/
|
|
int devm_request_threaded_irq(struct device *dev, unsigned int irq,
|
|
irq_handler_t handler, irq_handler_t thread_fn,
|
|
unsigned long irqflags, const char *devname,
|
|
void *dev_id)
|
|
{
|
|
struct irq_devres *dr;
|
|
int rc;
|
|
|
|
dr = devres_alloc(devm_irq_release, sizeof(struct irq_devres),
|
|
GFP_KERNEL);
|
|
if (!dr)
|
|
return -ENOMEM;
|
|
|
|
if (!devname)
|
|
devname = dev_name(dev);
|
|
|
|
rc = request_threaded_irq(irq, handler, thread_fn, irqflags, devname,
|
|
dev_id);
|
|
if (rc) {
|
|
devres_free(dr);
|
|
return rc;
|
|
}
|
|
|
|
dr->irq = irq;
|
|
dr->dev_id = dev_id;
|
|
devres_add(dev, dr);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(devm_request_threaded_irq);
|
|
|
|
/**
|
|
* devm_request_any_context_irq - allocate an interrupt line for a managed device
|
|
* @dev: device to request interrupt for
|
|
* @irq: Interrupt line to allocate
|
|
* @handler: Function to be called when the IRQ occurs
|
|
* @thread_fn: function to be called in a threaded interrupt context. NULL
|
|
* for devices which handle everything in @handler
|
|
* @irqflags: Interrupt type flags
|
|
* @devname: An ascii name for the claiming device, dev_name(dev) if NULL
|
|
* @dev_id: A cookie passed back to the handler function
|
|
*
|
|
* Except for the extra @dev argument, this function takes the
|
|
* same arguments and performs the same function as
|
|
* request_any_context_irq(). IRQs requested with this function will be
|
|
* automatically freed on driver detach.
|
|
*
|
|
* If an IRQ allocated with this function needs to be freed
|
|
* separately, devm_free_irq() must be used.
|
|
*/
|
|
int devm_request_any_context_irq(struct device *dev, unsigned int irq,
|
|
irq_handler_t handler, unsigned long irqflags,
|
|
const char *devname, void *dev_id)
|
|
{
|
|
struct irq_devres *dr;
|
|
int rc;
|
|
|
|
dr = devres_alloc(devm_irq_release, sizeof(struct irq_devres),
|
|
GFP_KERNEL);
|
|
if (!dr)
|
|
return -ENOMEM;
|
|
|
|
if (!devname)
|
|
devname = dev_name(dev);
|
|
|
|
rc = request_any_context_irq(irq, handler, irqflags, devname, dev_id);
|
|
if (rc < 0) {
|
|
devres_free(dr);
|
|
return rc;
|
|
}
|
|
|
|
dr->irq = irq;
|
|
dr->dev_id = dev_id;
|
|
devres_add(dev, dr);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(devm_request_any_context_irq);
|
|
|
|
/**
|
|
* devm_free_irq - free an interrupt
|
|
* @dev: device to free interrupt for
|
|
* @irq: Interrupt line to free
|
|
* @dev_id: Device identity to free
|
|
*
|
|
* Except for the extra @dev argument, this function takes the
|
|
* same arguments and performs the same function as free_irq().
|
|
* This function instead of free_irq() should be used to manually
|
|
* free IRQs allocated with devm_request_irq().
|
|
*/
|
|
void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id)
|
|
{
|
|
struct irq_devres match_data = { irq, dev_id };
|
|
|
|
WARN_ON(devres_destroy(dev, devm_irq_release, devm_irq_match,
|
|
&match_data));
|
|
free_irq(irq, dev_id);
|
|
}
|
|
EXPORT_SYMBOL(devm_free_irq);
|
|
|
|
struct irq_desc_devres {
|
|
unsigned int from;
|
|
unsigned int cnt;
|
|
};
|
|
|
|
static void devm_irq_desc_release(struct device *dev, void *res)
|
|
{
|
|
struct irq_desc_devres *this = res;
|
|
|
|
irq_free_descs(this->from, this->cnt);
|
|
}
|
|
|
|
/**
|
|
* __devm_irq_alloc_descs - Allocate and initialize a range of irq descriptors
|
|
* for a managed device
|
|
* @dev: Device to allocate the descriptors for
|
|
* @irq: Allocate for specific irq number if irq >= 0
|
|
* @from: Start the search from this irq number
|
|
* @cnt: Number of consecutive irqs to allocate
|
|
* @node: Preferred node on which the irq descriptor should be allocated
|
|
* @owner: Owning module (can be NULL)
|
|
* @affinity: Optional pointer to an affinity mask array of size @cnt
|
|
* which hints where the irq descriptors should be allocated
|
|
* and which default affinities to use
|
|
*
|
|
* Returns the first irq number or error code.
|
|
*
|
|
* Note: Use the provided wrappers (devm_irq_alloc_desc*) for simplicity.
|
|
*/
|
|
int __devm_irq_alloc_descs(struct device *dev, int irq, unsigned int from,
|
|
unsigned int cnt, int node, struct module *owner,
|
|
const struct cpumask *affinity)
|
|
{
|
|
struct irq_desc_devres *dr;
|
|
int base;
|
|
|
|
dr = devres_alloc(devm_irq_desc_release, sizeof(*dr), GFP_KERNEL);
|
|
if (!dr)
|
|
return -ENOMEM;
|
|
|
|
base = __irq_alloc_descs(irq, from, cnt, node, owner, affinity);
|
|
if (base < 0) {
|
|
devres_free(dr);
|
|
return base;
|
|
}
|
|
|
|
dr->from = base;
|
|
dr->cnt = cnt;
|
|
devres_add(dev, dr);
|
|
|
|
return base;
|
|
}
|
|
EXPORT_SYMBOL_GPL(__devm_irq_alloc_descs);
|
|
|
|
#ifdef CONFIG_GENERIC_IRQ_CHIP
|
|
/**
|
|
* devm_irq_alloc_generic_chip - Allocate and initialize a generic chip
|
|
* for a managed device
|
|
* @dev: Device to allocate the generic chip for
|
|
* @name: Name of the irq chip
|
|
* @num_ct: Number of irq_chip_type instances associated with this
|
|
* @irq_base: Interrupt base nr for this chip
|
|
* @reg_base: Register base address (virtual)
|
|
* @handler: Default flow handler associated with this chip
|
|
*
|
|
* Returns an initialized irq_chip_generic structure. The chip defaults
|
|
* to the primary (index 0) irq_chip_type and @handler
|
|
*/
|
|
struct irq_chip_generic *
|
|
devm_irq_alloc_generic_chip(struct device *dev, const char *name, int num_ct,
|
|
unsigned int irq_base, void __iomem *reg_base,
|
|
irq_flow_handler_t handler)
|
|
{
|
|
struct irq_chip_generic *gc;
|
|
unsigned long sz = sizeof(*gc) + num_ct * sizeof(struct irq_chip_type);
|
|
|
|
gc = devm_kzalloc(dev, sz, GFP_KERNEL);
|
|
if (gc)
|
|
irq_init_generic_chip(gc, name, num_ct,
|
|
irq_base, reg_base, handler);
|
|
|
|
return gc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(devm_irq_alloc_generic_chip);
|
|
|
|
struct irq_generic_chip_devres {
|
|
struct irq_chip_generic *gc;
|
|
u32 msk;
|
|
unsigned int clr;
|
|
unsigned int set;
|
|
};
|
|
|
|
static void devm_irq_remove_generic_chip(struct device *dev, void *res)
|
|
{
|
|
struct irq_generic_chip_devres *this = res;
|
|
|
|
irq_remove_generic_chip(this->gc, this->msk, this->clr, this->set);
|
|
}
|
|
|
|
/**
|
|
* devm_irq_setup_generic_chip - Setup a range of interrupts with a generic
|
|
* chip for a managed device
|
|
*
|
|
* @dev: Device to setup the generic chip for
|
|
* @gc: Generic irq chip holding all data
|
|
* @msk: Bitmask holding the irqs to initialize relative to gc->irq_base
|
|
* @flags: Flags for initialization
|
|
* @clr: IRQ_* bits to clear
|
|
* @set: IRQ_* bits to set
|
|
*
|
|
* Set up max. 32 interrupts starting from gc->irq_base. Note, this
|
|
* initializes all interrupts to the primary irq_chip_type and its
|
|
* associated handler.
|
|
*/
|
|
int devm_irq_setup_generic_chip(struct device *dev, struct irq_chip_generic *gc,
|
|
u32 msk, enum irq_gc_flags flags,
|
|
unsigned int clr, unsigned int set)
|
|
{
|
|
struct irq_generic_chip_devres *dr;
|
|
|
|
dr = devres_alloc(devm_irq_remove_generic_chip,
|
|
sizeof(*dr), GFP_KERNEL);
|
|
if (!dr)
|
|
return -ENOMEM;
|
|
|
|
irq_setup_generic_chip(gc, msk, flags, clr, set);
|
|
|
|
dr->gc = gc;
|
|
dr->msk = msk;
|
|
dr->clr = clr;
|
|
dr->set = set;
|
|
devres_add(dev, dr);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(devm_irq_setup_generic_chip);
|
|
#endif /* CONFIG_GENERIC_IRQ_CHIP */
|