Commit-ID: a71b9412c90ca784ae68d32ec307cc527b5962a9
Gitweb: http://git.kernel.org/tip/a71b9412c90ca784ae68d32ec307cc527b5962a9
Author: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx>
AuthorDate: Wed, 10 Feb 2016 15:47:00 +0100
Committer: Jason Cooper <jason@xxxxxxxxxxxxxx>
CommitDate: Tue, 16 Feb 2016 17:36:16 +0000
irqchip/armada-370-xp: Allow allocation of multiple MSIs
Add support for allocating multiple MSIs at the same time, so that the
MSI_FLAG_MULTI_PCI_MSI flag can be added to the msi_domain_info
structure.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/1455115621-22846-6-git-send-email-thomas.petazzoni@xxxxxxxxxxxxxxxxxx
Signed-off-by: Jason Cooper <jason@xxxxxxxxxxxxxx>
---
drivers/irqchip/irq-armada-370-xp.c | 25 ++++++++++++++-----------
1 file changed, 14 insertions(+), 11 deletions(-)
diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c
index c99ae5f..e7dc6cb 100644
--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -123,7 +123,8 @@ static struct irq_chip armada_370_xp_msi_irq_chip = {
};
static struct msi_domain_info armada_370_xp_msi_domain_info = {
- .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS),
+ .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
+ MSI_FLAG_MULTI_PCI_MSI),
.chip = &armada_370_xp_msi_irq_chip,
};
@@ -149,21 +150,26 @@ static struct irq_chip armada_370_xp_msi_bottom_irq_chip = {
static int armada_370_xp_msi_alloc(struct irq_domain *domain, unsigned int virq,
unsigned int nr_irqs, void *args)
{
- int hwirq;
+ int hwirq, i;
mutex_lock(&msi_used_lock);
- hwirq = find_first_zero_bit(&msi_used, PCI_MSI_DOORBELL_NR);
+
+ hwirq = bitmap_find_next_zero_area(msi_used, PCI_MSI_DOORBELL_NR,
+ 0, nr_irqs, 0);
if (hwirq >= PCI_MSI_DOORBELL_NR) {
mutex_unlock(&msi_used_lock);
return -ENOSPC;
}
- set_bit(hwirq, msi_used);
+ bitmap_set(msi_used, hwirq, nr_irqs);
mutex_unlock(&msi_used_lock);
- irq_domain_set_info(domain, virq, hwirq, &armada_370_xp_msi_bottom_irq_chip,
- domain->host_data, handle_simple_irq,
- NULL, NULL);
+ for (i = 0; i < nr_irqs; i++) {
+ irq_domain_set_info(domain, virq + i, hwirq + i,
+ &armada_370_xp_msi_bottom_irq_chip,
+ domain->host_data, handle_simple_irq,
+ NULL, NULL);
+ }
return hwirq;
}
@@ -174,10 +180,7 @@ static void armada_370_xp_msi_free(struct irq_domain *domain,
struct irq_data *d = irq_domain_get_irq_data(domain, virq);
mutex_lock(&msi_used_lock);
- if (!test_bit(d->hwirq, msi_used))
- pr_err("trying to free unused MSI#%lu\n", d->hwirq);
- else
- clear_bit(d->hwirq, msi_used);
+ bitmap_clear(msi_used, d->hwirq, nr_irqs);
mutex_unlock(&msi_used_lock);
}
--
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