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authorGrant Likely <grant.likely@linaro.org>2013-06-06 22:20:44 +0100
committerGrant Likely <grant.likely@linaro.org>2013-06-10 11:52:09 +0100
commit1400ea86025a22862f97e7fe544433751b43ecec (patch)
treed7ce4026f1cfb9472631e286a176f9b5ae7ff6f6 /kernel/irq
parentfa40f377577752b83252b9d2b3165d4acee0eb7c (diff)
downloadlinux-linaro-stable-1400ea86025a22862f97e7fe544433751b43ecec.tar.gz
irqdomain: Beef up debugfs output
This patch increases the amount of output produced by the irq_domain_mapping debugfs file by first listing all of the registered irq domains at the beginning of the output, and then by including all mapped IRQs in the output, not just the active ones. It is very useful when debugging irqdomain issues to be able to see the entire list of mapped irqs, not just the ones that happen to be connected to devices. Signed-off-by: Grant Likely <grant.likely@linaro.org>
Diffstat (limited to 'kernel/irq')
-rw-r--r--kernel/irq/irqdomain.c35
1 files changed, 30 insertions, 5 deletions
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index e0db59e2eef6..280b8047d8db 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -596,12 +596,29 @@ static int virq_debug_show(struct seq_file *m, void *private)
{
unsigned long flags;
struct irq_desc *desc;
- void *data;
+ struct irq_domain *domain;
+ struct radix_tree_iter iter;
+ void *data, **slot;
int i;
- seq_printf(m, "%-5s %-7s %-15s %-*s %s\n", "irq", "hwirq",
+ seq_printf(m, " %-16s %-6s %-10s %-10s %s\n",
+ "name", "mapped", "linear-max", "direct-max", "devtree-node");
+ mutex_lock(&irq_domain_mutex);
+ list_for_each_entry(domain, &irq_domain_list, link) {
+ int count = 0;
+ radix_tree_for_each_slot(slot, &domain->revmap_tree, &iter, 0)
+ count++;
+ seq_printf(m, "%c%-16s %6u %10u %10u %s\n",
+ domain == irq_default_domain ? '*' : ' ', domain->name,
+ domain->revmap_size + count, domain->revmap_size,
+ domain->revmap_direct_max_irq,
+ domain->of_node ? of_node_full_name(domain->of_node) : "");
+ }
+ mutex_unlock(&irq_domain_mutex);
+
+ seq_printf(m, "%-5s %-7s %-15s %-*s %6s %-14s %s\n", "irq", "hwirq",
"chip name", (int)(2 * sizeof(void *) + 2), "chip data",
- "domain name");
+ "active", "type", "domain");
for (i = 1; i < nr_irqs; i++) {
desc = irq_to_desc(i);
@@ -609,12 +626,15 @@ static int virq_debug_show(struct seq_file *m, void *private)
continue;
raw_spin_lock_irqsave(&desc->lock, flags);
+ domain = desc->irq_data.domain;
- if (desc->action && desc->action->handler) {
+ if (domain) {
struct irq_chip *chip;
+ int hwirq = desc->irq_data.hwirq;
+ bool direct;
seq_printf(m, "%5d ", i);
- seq_printf(m, "0x%05lx ", desc->irq_data.hwirq);
+ seq_printf(m, "0x%05x ", hwirq);
chip = irq_desc_get_chip(desc);
seq_printf(m, "%-15s ", (chip && chip->name) ? chip->name : "none");
@@ -622,6 +642,11 @@ static int virq_debug_show(struct seq_file *m, void *private)
data = irq_desc_get_chip_data(desc);
seq_printf(m, data ? "0x%p " : " %p ", data);
+ seq_printf(m, " %c ", (desc->action && desc->action->handler) ? '*' : ' ');
+ direct = (i == hwirq) && (i < domain->revmap_direct_max_irq);
+ seq_printf(m, "%6s%-8s ",
+ (hwirq < domain->revmap_size) ? "LINEAR" : "RADIX",
+ direct ? "(DIRECT)" : "");
seq_printf(m, "%s\n", desc->irq_data.domain->name);
}