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irqchip/sifive-plic: Differentiate between PLIC handler and context

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We explicitly differentiate between PLIC handler and context because
PLIC context is for given mode of HART whereas PLIC handler is per-CPU
software construct meant for handling interrupts from a particular
PLIC context.

To achieve this differentiation, we rename "nr_handlers" to "nr_contexts"
and "nr_mapped" to "nr_handlers" in plic_init().

Signed-off-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Anup Patel 2019-02-12 18:22:45 +05:30 committed by Marc Zyngier
parent 3fecb5aac2
commit 6adfe8d2f5
1 changed files with 8 additions and 8 deletions
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16
drivers/irqchip/irq-sifive-plic.c
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@ -177,7 +177,7 @@ static int plic_find_hart_id(struct device_node *node)
static int __init plic_init(struct device_node *node,
struct device_node *parent)
{
int error = 0, nr_handlers, nr_mapped = 0, i;
int error = 0, nr_contexts, nr_handlers = 0, i;
u32 nr_irqs;
if (plic_regs) {
@ -194,10 +194,10 @@ static int __init plic_init(struct device_node *node,
if (WARN_ON(!nr_irqs))
goto out_iounmap;
nr_handlers = of_irq_count(node);
if (WARN_ON(!nr_handlers))
nr_contexts = of_irq_count(node);
if (WARN_ON(!nr_contexts))
goto out_iounmap;
if (WARN_ON(nr_handlers < num_possible_cpus()))
if (WARN_ON(nr_contexts < num_possible_cpus()))
goto out_iounmap;
error = -ENOMEM;
@ -206,7 +206,7 @@ static int __init plic_init(struct device_node *node,
if (WARN_ON(!plic_irqdomain))
goto out_iounmap;
for (i = 0; i < nr_handlers; i++) {
for (i = 0; i < nr_contexts; i++) {
struct of_phandle_args parent;
struct plic_handler *handler;
irq_hw_number_t hwirq;
@ -250,11 +250,11 @@ static int __init plic_init(struct device_node *node,
writel(0, handler->hart_base + CONTEXT_THRESHOLD);
for (hwirq = 1; hwirq <= nr_irqs; hwirq++)
plic_toggle(handler, hwirq, 0);
nr_mapped++;
nr_handlers++;
}
pr_info("mapped %d interrupts to %d (out of %d) handlers.\n",
nr_irqs, nr_mapped, nr_handlers);
pr_info("mapped %d interrupts with %d handlers for %d contexts.\n",
nr_irqs, nr_handlers, nr_contexts);
set_handle_irq(plic_handle_irq);
return 0;