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lib: sbi_irqchip: Allow registering interrupt handlers

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To handle external interrupts in M-mode, the sbi_irqchip framework
must allow registering interrupt handlers from device drivers.

Signed-off-by: Anup Patel <anup.patel@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260213055342.3124872-9-anup.patel@oss.qualcomm.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Anup Patel
2026-02-13 11:23:42 +05:30
committed by Anup Patel
parent e8ebd1fbc6
commit 0ab0c470d5
5 changed files with 267 additions and 3 deletions
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56
include/sbi/sbi_irqchip.h
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@@ -18,12 +18,21 @@ struct sbi_scratch;
/** irqchip hardware device */
struct sbi_irqchip_device {
/** Node in the list of irqchip devices */
/** Node in the list of irqchip devices (private) */
struct sbi_dlist node;
/** Internal data of all hardware interrupts of this irqchip (private) */
struct sbi_irqchip_hwirq_data *hwirqs;
/** List of interrupt handlers */
struct sbi_dlist handler_list;
/** Unique ID of this irqchip */
u32 id;
/** Number of hardware IRQs of this irqchip */
u32 num_hwirq;
/** Set of harts targetted by this irqchip */
struct sbi_hartmask target_harts;
@@ -32,6 +41,21 @@ struct sbi_irqchip_device {
/** Process hardware interrupts from this irqchip */
int (*process_hwirqs)(struct sbi_irqchip_device *chip);
/** Setup a hardware interrupt of this irqchip */
int (*hwirq_setup)(struct sbi_irqchip_device *chip, u32 hwirq);
/** Cleanup a hardware interrupt of this irqchip */
void (*hwirq_cleanup)(struct sbi_irqchip_device *chip, u32 hwirq);
/** End of hardware interrupt of this irqchip */
void (*hwirq_eoi)(struct sbi_irqchip_device *chip, u32 hwirq);
/** Mask a hardware interrupt of this irqchip */
void (*hwirq_mask)(struct sbi_irqchip_device *chip, u32 hwirq);
/** Unmask a hardware interrupt of this irqchip */
void (*hwirq_unmask)(struct sbi_irqchip_device *chip, u32 hwirq);
};
/**
@@ -44,6 +68,36 @@ struct sbi_irqchip_device {
*/
int sbi_irqchip_process(void);
/**
* Process a hwirq of an irqchip device
*
* This function is called by irqchip drivers to handle hardware
* interrupts of the irqchip.
*/
int sbi_irqchip_process_hwirq(struct sbi_irqchip_device *chip, u32 hwirq);
/** Unmask a hardware interrupt */
int sbi_irqchip_unmask_hwirq(struct sbi_irqchip_device *chip, u32 hwirq);
/** Mask a hardware interrupt */
int sbi_irqchip_mask_hwirq(struct sbi_irqchip_device *chip, u32 hwirq);
/** Default raw hardware interrupt handler */
int sbi_irqchip_raw_handler_default(struct sbi_irqchip_device *chip, u32 hwirq);
/** Set raw hardware interrupt handler */
int sbi_irqchip_set_raw_handler(struct sbi_irqchip_device *chip, u32 hwirq,
int (*raw_hndl)(struct sbi_irqchip_device *, u32));
/** Register a hardware interrupt handler */
int sbi_irqchip_register_handler(struct sbi_irqchip_device *chip,
u32 first_hwirq, u32 num_hwirq,
int (*callback)(u32 hwirq, void *opaque), void *opaque);
/** Unregister a hardware interrupt handler */
int sbi_irqchip_unregister_handler(struct sbi_irqchip_device *chip,
u32 first_hwirq, u32 num_hwirq);
/** Find an irqchip device based on unique ID */
struct sbi_irqchip_device *sbi_irqchip_find_device(u32 id);