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lib: sbi_irqchip: Associate 32-bit unique ID for each irqchip device

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Allow locating irqchip device instance using a unique 32-bit ID. This
32-bit unique ID can be set by the irqchip driver at the time of adding
irqchip device.

Signed-off-by: Anup Patel <anup.patel@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260213055342.3124872-8-anup.patel@oss.qualcomm.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Anup Patel
2026-02-13 11:23:41 +05:30
committed by Anup Patel
parent e82d20122d
commit e8ebd1fbc6
5 changed files with 24 additions and 0 deletions
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6
include/sbi/sbi_irqchip.h
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@@ -21,6 +21,9 @@ struct sbi_irqchip_device {
/** Node in the list of irqchip devices */ /** Node in the list of irqchip devices */
struct sbi_dlist node; struct sbi_dlist node;
/** Unique ID of this irqchip */
u32 id;
/** Set of harts targetted by this irqchip */ /** Set of harts targetted by this irqchip */
struct sbi_hartmask target_harts; struct sbi_hartmask target_harts;
@@ -41,6 +44,9 @@ struct sbi_irqchip_device {
*/ */
int sbi_irqchip_process(void); int sbi_irqchip_process(void);
/** Find an irqchip device based on unique ID */
struct sbi_irqchip_device *sbi_irqchip_find_device(u32 id);
/** Register an irqchip device to receive callbacks */ /** Register an irqchip device to receive callbacks */
int sbi_irqchip_add_device(struct sbi_irqchip_device *chip); int sbi_irqchip_add_device(struct sbi_irqchip_device *chip);

15
lib/sbi/sbi_irqchip.c
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@@ -30,6 +30,18 @@ int sbi_irqchip_process(void)
return hd->chip->process_hwirqs(hd->chip); return hd->chip->process_hwirqs(hd->chip);
} }
struct sbi_irqchip_device *sbi_irqchip_find_device(u32 id)
{
struct sbi_irqchip_device *chip;
sbi_list_for_each_entry(chip, &irqchip_list, node) {
if (chip->id == id)
return chip;
}
return NULL;
}
int sbi_irqchip_add_device(struct sbi_irqchip_device *chip) int sbi_irqchip_add_device(struct sbi_irqchip_device *chip)
{ {
struct sbi_irqchip_hart_data *hd; struct sbi_irqchip_hart_data *hd;
@@ -39,6 +51,9 @@ int sbi_irqchip_add_device(struct sbi_irqchip_device *chip)
if (!chip || !sbi_hartmask_weight(&chip->target_harts)) if (!chip || !sbi_hartmask_weight(&chip->target_harts))
return SBI_EINVAL; return SBI_EINVAL;
if (sbi_irqchip_find_device(chip->id))
return SBI_EALREADY;
if (chip->process_hwirqs) { if (chip->process_hwirqs) {
sbi_hartmask_for_each_hartindex(h, &chip->target_harts) { sbi_hartmask_for_each_hartindex(h, &chip->target_harts) {
scratch = sbi_hartindex_to_scratch(h); scratch = sbi_hartindex_to_scratch(h);

1
lib/utils/irqchip/aplic.c
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@@ -306,6 +306,7 @@ int aplic_cold_irqchip_init(struct aplic_data *aplic)
} }
/* Register irqchip device */ /* Register irqchip device */
aplic->irqchip.id = aplic->unique_id;
rc = sbi_irqchip_add_device(&aplic->irqchip); rc = sbi_irqchip_add_device(&aplic->irqchip);
if (rc) if (rc)
return rc; return rc;

1
lib/utils/irqchip/imsic.c
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@@ -391,6 +391,7 @@ int imsic_cold_irqchip_init(struct imsic_data *imsic)
} }
/* Register irqchip device */ /* Register irqchip device */
imsic_device.id = imsic->unique_id;
sbi_hartmask_set_all(&imsic_device.target_harts); sbi_hartmask_set_all(&imsic_device.target_harts);
rc = sbi_irqchip_add_device(&imsic_device); rc = sbi_irqchip_add_device(&imsic_device);
if (rc) if (rc)

1
lib/utils/irqchip/plic.c
View File

@@ -280,6 +280,7 @@ int plic_cold_irqchip_init(struct plic_data *plic)
} }
/* Register irqchip device */ /* Register irqchip device */
plic->irqchip.id = plic->unique_id;
plic->irqchip.warm_init = plic_warm_irqchip_init; plic->irqchip.warm_init = plic_warm_irqchip_init;
return sbi_irqchip_add_device(&plic->irqchip); return sbi_irqchip_add_device(&plic->irqchip);
} }