acpm: dump delta of kernel irq counts when ipc timeout

Bug: 249004528 Change-Id: I01bffc2c7505fb76696f87f713c97c63f3b2b51d Signed-off-by: Redick_Lin <[email protected]>
celtare21 · Oct 31, 2022 · 827e0fb · 827e0fb
1 parent 3920886
commit 827e0fb
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Showing 2 changed files with 72 additions and 1 deletion.
diff --git a/drivers/soc/google/acpm/acpm_ipc.c b/drivers/soc/google/acpm/acpm_ipc.c
@@ -21,6 +21,7 @@
 #include <linux/workqueue.h>
 #include <linux/debugfs.h>
 #include <linux/bitmap.h>
+#include <linux/kernel_stat.h>
 #include <soc/google/exynos-debug.h>
 #include <soc/google/debug-snapshot.h>
 
@@ -42,6 +43,7 @@ static struct acpm_ipc_info *acpm_ipc;
 static struct workqueue_struct *update_log_wq;
 static struct acpm_debug_info *acpm_debug;
 static bool is_acpm_stop_log;
+static struct cpu_irq_info *irq_info;
 
 static struct acpm_framework *acpm_initdata;
 static void __iomem *acpm_srambase;
@@ -574,6 +576,65 @@ int acpm_ipc_send_data_sync(unsigned int channel_id, struct ipc_config *cfg)
 }
 EXPORT_SYMBOL_GPL(acpm_ipc_send_data_sync);
 
+#ifndef arch_irq_stat
+#define arch_irq_stat() 0
+#endif
+
+extern int nr_irqs;
+
+static void cpu_irq_info_dump(u32 retry)
+{
+	int i, cpu;
+	u64 sum = 0;
+
+	for_each_possible_cpu(cpu)
+		sum += kstat_cpu_irqs_sum(cpu);
+
+	sum += arch_irq_stat();
+
+	if (retry == 5)
+		pr_info("<Dump delta of irq counts>\n");
+
+	for_each_irq_nr(i) {
+		struct irq_data *data;
+		struct irq_desc *desc;
+		unsigned int irq_stat = 0, delta;
+		const char *name;
+
+		data = irq_get_irq_data(i);
+		if (!data)
+			continue;
+
+		desc = irq_data_to_desc(data);
+		if (!desc)
+			continue;
+
+		for_each_possible_cpu(cpu)
+			irq_stat += *per_cpu_ptr(desc->kstat_irqs, cpu);
+
+		if (!irq_stat)
+			continue;
+
+		if (desc->action && desc->action->name)
+			name = desc->action->name;
+		else
+			name = "???";
+
+		if (retry == 1) {
+			irq_info[i].irq_num = i;
+			irq_info[i].hwirq_num = desc->irq_data.hwirq;
+			irq_info[i].irq_stat = irq_stat;
+			irq_info[i].name = name;
+		} else if (retry == 5) {
+			delta = irq_stat - irq_info[i].irq_stat;
+			if (delta > 0) {
+				pr_info("irq-%-4d(hwirq-%-3d) delta of irqs: %8u %s\n",
+					i, (int)desc->irq_data.hwirq, delta, name);
+			}
+		}
+	}
+}
+
 int __acpm_ipc_send_data(unsigned int channel_id, struct ipc_config *cfg, bool w_mode)
 {
 	volatile unsigned int tx_front, tx_rear, rx_front;
@@ -702,6 +763,7 @@ int __acpm_ipc_send_data(unsigned int channel_id, struct ipc_config *cfg, bool w
 						__raw_readl(acpm_ipc->intr + INTMR1),
 						__raw_readl(acpm_ipc->intr + INTMSR1));
 
+					cpu_irq_info_dump(retry_cnt);
 					++retry_cnt;
 
 					goto retry;
@@ -731,7 +793,6 @@ int __acpm_ipc_send_data(unsigned int channel_id, struct ipc_config *cfg, bool w
 			pr_err("%s Timeout error! now = %llu timeout = %llu ch:%u s:%u bitmap:%lx\n",
 			       __func__, now, timeout, channel->id, seq_num,
 			       channel->bitmap_seqnum[0]);
-
 			acpm_ramdump();
 			dump_stack();
 			dbg_snapshot_do_dpm_policy(acpm_ipc->panic_action, "acpm_ipc timeout");
@@ -1019,6 +1080,9 @@ int acpm_ipc_probe(struct platform_device *pdev)
 	}
 
 	ret = plugins_init(node);
+
+	irq_info = kcalloc(nr_irqs, sizeof(struct cpu_irq_info), GFP_KERNEL);
+
 	dev_info(&pdev->dev, "acpm_ipc probe done.\n");
 	return ret;
 }

diff --git a/drivers/soc/google/acpm/acpm_ipc.h b/drivers/soc/google/acpm/acpm_ipc.h
@@ -86,6 +86,13 @@ struct acpm_debug_info {
 	spinlock_t lock; /* generic spin-lock for debug */
 };
 
+struct cpu_irq_info {
+	const char      *name;
+	int             irq_num;
+	unsigned long   hwirq_num;
+	unsigned int    irq_stat;
+};
+
 #define LOG_ID_SHIFT				(28)
 #define LOG_IS_RAW_SHIFT			(27)
 #define LOG_IS_ERR_SHIFT			(26)