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irqchip/gic-v3-its: Rework LPI freeing

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Rework LPI deallocation so that it can be reused by the v4 support
code.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Marc Zyngier 2016-12-19 18:49:59 +00:00
parent 7c297a2d5c
commit cf2be8ba6f
1 changed files with 7 additions and 6 deletions
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13
drivers/irqchip/irq-gic-v3-its.c
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@ -881,16 +881,15 @@ static unsigned long *its_lpi_alloc_chunks(int nr_irqs, int *base, int *nr_ids)
return bitmap;
}
static void its_lpi_free(struct event_lpi_map *map)
static void its_lpi_free_chunks(unsigned long *bitmap, int base, int nr_ids)
{
int base = map->lpi_base;
int nr_ids = map->nr_lpis;
int lpi;
spin_lock(&lpi_lock);
for (lpi = base; lpi < (base + nr_ids); lpi += IRQS_PER_CHUNK) {
int chunk = its_lpi_to_chunk(lpi);
BUG_ON(chunk > lpi_chunks);
if (test_bit(chunk, lpi_bitmap)) {
clear_bit(chunk, lpi_bitmap);
@ -901,8 +900,7 @@ static void its_lpi_free(struct event_lpi_map *map)
spin_unlock(&lpi_lock);
kfree(map->lpi_map);
kfree(map->col_map);
kfree(bitmap);
}
static struct page *its_allocate_prop_table(gfp_t gfp_flags)
@ -1674,7 +1672,10 @@ static void its_irq_domain_free(struct irq_domain *domain, unsigned int virq,
/* If all interrupts have been freed, start mopping the floor */
if (bitmap_empty(its_dev->event_map.lpi_map,
its_dev->event_map.nr_lpis)) {
its_lpi_free(&its_dev->event_map);
its_lpi_free_chunks(its_dev->event_map.lpi_map,
its_dev->event_map.lpi_base,
its_dev->event_map.nr_lpis);
kfree(its_dev->event_map.col_map);
/* Unmap device/itt */
its_send_mapd(its_dev, 0);