lib: utils: Fix irqchip registration for PLIC and APLIC

Currently, the same irqchip instance is registered for multiple PLIC
and APLIC instances which causes the sbi_list_for_each_entry() loop
in the sbi_irqchip_init() to hang at boot-time.

To address the above issue, register a separate irqchip instance for
each PLIC and APLIC instance.

Fixes: 2dd6eaf ("lib: sbi_irqchip: Call driver warm_init from SBI core")
Reported-by: Himanshu Chauhan <[email protected]>
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Himanshu Chauhan <[email protected]>

Author: avpatel

include/sbi_utils/irqchip/aplic.h

@@ -12,6 +12,7 @@
 #define __IRQCHIP_APLIC_H__
 
 #include <sbi/sbi_types.h>
+#include <sbi/sbi_irqchip.h>
 
 #define APLIC_MAX_DELEGATE	16
 
@@ -30,6 +31,9 @@ struct aplic_delegate_data {
 };
 
 struct aplic_data {
+	/* Private members */
+	struct sbi_irqchip_device irqchip;
+	/* Public members */
 	unsigned long addr;
 	unsigned long size;
 	unsigned long num_idc;

include/sbi_utils/irqchip/plic.h

@@ -11,8 +11,12 @@
 #define __IRQCHIP_PLIC_H__
 
 #include <sbi/sbi_types.h>
+#include <sbi/sbi_irqchip.h>
 
 struct plic_data {
+	/* Private members */
+	struct sbi_irqchip_device irqchip;
+	/* Public members */
 	unsigned long addr;
 	unsigned long size;
 	unsigned long num_src;

lib/utils/irqchip/aplic.c

@@ -12,7 +12,6 @@
 #include <sbi/sbi_console.h>
 #include <sbi/sbi_domain.h>
 #include <sbi/sbi_error.h>
-#include <sbi/sbi_irqchip.h>
 #include <sbi_utils/irqchip/aplic.h>
 
 #define APLIC_MAX_IDC			(1UL << 14)
@@ -166,9 +165,6 @@ static int aplic_check_msicfg(struct aplic_msicfg_data *msicfg)
 	return 0;
 }
 
-static struct sbi_irqchip_device aplic_device = {
-};
-
 int aplic_cold_irqchip_init(struct aplic_data *aplic)
 {
 	int rc;
@@ -280,7 +276,7 @@ int aplic_cold_irqchip_init(struct aplic_data *aplic)
 	}
 
 	/* Register irqchip device */
-	sbi_irqchip_add_device(&aplic_device);
+	sbi_irqchip_add_device(&aplic->irqchip);
 
 	return 0;
 }

lib/utils/irqchip/plic.c

@@ -15,7 +15,6 @@
 #include <sbi/sbi_domain.h>
 #include <sbi/sbi_error.h>
 #include <sbi/sbi_heap.h>
-#include <sbi/sbi_irqchip.h>
 #include <sbi/sbi_string.h>
 #include <sbi_utils/irqchip/plic.h>
 
@@ -221,10 +220,6 @@ static int plic_warm_irqchip_init(struct sbi_irqchip_device *dev)
 	return 0;
 }
 
-static struct sbi_irqchip_device plic_device = {
-	.warm_init	= plic_warm_irqchip_init,
-};
-
 int plic_cold_irqchip_init(struct plic_data *plic)
 {
 	int i, ret;
@@ -284,7 +279,8 @@ int plic_cold_irqchip_init(struct plic_data *plic)
 	}
 
 	/* Register irqchip device */
-	sbi_irqchip_add_device(&plic_device);
+	plic->irqchip.warm_init = plic_warm_irqchip_init;
+	sbi_irqchip_add_device(&plic->irqchip);
 
 	return 0;
 }