diff options
| author |   Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2016-02-10 15:47:00 +0100 |
|---|---|---|
| committer |   Jason Cooper <jason@lakedaemon.net> | 2016-02-16 17:36:16 +0000 |
| commit | a71b9412c90ca784ae68d32ec307cc527b5962a9 (patch) | |
| tree | df963eb1711df7b4c773e84819f54f71d6e0371f /drivers/irqchip | |
| parent | irqchip/armada-370-xp: Use shorter names for irq_chip (diff) | |
| download | linux-dev-a71b9412c90ca784ae68d32ec307cc527b5962a9.tar.xz linux-dev-a71b9412c90ca784ae68d32ec307cc527b5962a9.zip | |
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@free-electrons.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Link: https://lkml.kernel.org/r/1455115621-22846-6-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-armada-370-xp.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c index c99ae5fc5500..e7dc6cbda2a1 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); } |