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Subject[PATCH v5 16/19] irqchip: GICv2m: Get rid of struct msi_controller
Date
GICv2m only uses the msi_controller structure as a way to match
the host bridge with its MSI HW, and thus the msi_domain.

But now that we can directly associate an msi_domain with a device,
there is no use keeping this msi_controller around.

Just remove all traces of msi_controller from the driver. Also
tag the inner (non-PCI) domain with DOMAIN_BUS_NEXUS.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/irqchip/irq-gic-v2m.c | 27 ++++++++++-----------------
1 file changed, 10 insertions(+), 17 deletions(-)

diff --git a/drivers/irqchip/irq-gic-v2m.c b/drivers/irqchip/irq-gic-v2m.c
index fdf7065..ec9c376 100644
--- a/drivers/irqchip/irq-gic-v2m.c
+++ b/drivers/irqchip/irq-gic-v2m.c
@@ -45,7 +45,6 @@

struct v2m_data {
spinlock_t msi_cnt_lock;
- struct msi_controller mchip;
struct resource res; /* GICv2m resource */
void __iomem *base; /* GICv2m virt address */
u32 spi_start; /* The SPI number that MSIs start */
@@ -218,6 +217,7 @@ static int __init gicv2m_init_one(struct device_node *node,
{
int ret;
struct v2m_data *v2m;
+ struct irq_domain *inner_domain;

v2m = kzalloc(sizeof(struct v2m_data), GFP_KERNEL);
if (!v2m) {
@@ -261,19 +261,18 @@ static int __init gicv2m_init_one(struct device_node *node,
goto err_iounmap;
}

- v2m->domain = irq_domain_add_tree(NULL, &gicv2m_domain_ops, v2m);
- if (!v2m->domain) {
+ inner_domain = irq_domain_add_tree(node, &gicv2m_domain_ops, v2m);
+ if (!inner_domain) {
pr_err("Failed to create GICv2m domain\n");
ret = -ENOMEM;
goto err_free_bm;
}

- v2m->domain->parent = parent;
- v2m->mchip.of_node = node;
- v2m->mchip.domain = pci_msi_create_irq_domain(node,
- &gicv2m_msi_domain_info,
- v2m->domain);
- if (!v2m->mchip.domain) {
+ inner_domain->bus_token = DOMAIN_BUS_NEXUS;
+ inner_domain->parent = parent;
+ v2m->domain = pci_msi_create_irq_domain(node, &gicv2m_msi_domain_info,
+ inner_domain);
+ if (!v2m->domain) {
pr_err("Failed to create MSI domain\n");
ret = -ENOMEM;
goto err_free_domains;
@@ -281,12 +280,6 @@ static int __init gicv2m_init_one(struct device_node *node,

spin_lock_init(&v2m->msi_cnt_lock);

- ret = of_pci_msi_chip_add(&v2m->mchip);
- if (ret) {
- pr_err("Failed to add msi_chip.\n");
- goto err_free_domains;
- }
-
pr_info("Node %s: range[%#lx:%#lx], SPI[%d:%d]\n", node->name,
(unsigned long)v2m->res.start, (unsigned long)v2m->res.end,
v2m->spi_start, (v2m->spi_start + v2m->nr_spis));
@@ -294,10 +287,10 @@ static int __init gicv2m_init_one(struct device_node *node,
return 0;

err_free_domains:
- if (v2m->mchip.domain)
- irq_domain_remove(v2m->mchip.domain);
if (v2m->domain)
irq_domain_remove(v2m->domain);
+ if (inner_domain)
+ irq_domain_remove(inner_domain);
err_free_bm:
kfree(v2m->bm);
err_iounmap:
--
2.1.4


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