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irqchip/ti-sci-inta: Add msi domain support 

Add a msi domain that is child to the INTA domain. Clients
uses the INTA MSI bus layer to allocate irqs in this
MSI domain.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Lokesh Vutla 2019-04-30 15:42:29 +05:30 committed by Marc Zyngier
parent 49b323157b
commit f011df6179
2 changed files with 40 additions and 1 deletions
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1
drivers/irqchip/Kconfig
View File

@ -433,6 +433,7 @@ config TI_SCI_INTA_IRQCHIP
bool
depends on TI_SCI_PROTOCOL
select IRQ_DOMAIN_HIERARCHY
select TI_SCI_INTA_MSI_DOMAIN
help
This enables the irqchip driver support for K3 Interrupt aggregator
over TI System Control Interface available on some new TI's SoCs.

40
drivers/irqchip/irq-ti-sci-inta.c
View File

@ -18,6 +18,7 @@
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/soc/ti/ti_sci_inta_msi.h>
#include <linux/soc/ti/ti_sci_protocol.h>
#include <asm-generic/msi.h>
@ -28,6 +29,9 @@
#define HWIRQ_TO_DEVID(hwirq) (((hwirq) >> (TI_SCI_DEV_ID_SHIFT)) & \
(TI_SCI_DEV_ID_MASK))
#define HWIRQ_TO_IRQID(hwirq) ((hwirq) & (TI_SCI_IRQ_ID_MASK))
#define TO_HWIRQ(dev, index) ((((dev) & TI_SCI_DEV_ID_MASK) << \
TI_SCI_DEV_ID_SHIFT) | \
((index) & TI_SCI_IRQ_ID_MASK))
#define MAX_EVENTS_PER_VINT 64
#define VINT_ENABLE_SET_OFFSET 0x0
@ -484,9 +488,34 @@ static const struct irq_domain_ops ti_sci_inta_irq_domain_ops = {
.alloc = ti_sci_inta_irq_domain_alloc,
};
static struct irq_chip ti_sci_inta_msi_irq_chip = {
.name = "MSI-INTA",
.flags = IRQCHIP_SUPPORTS_LEVEL_MSI,
};
static void ti_sci_inta_msi_set_desc(msi_alloc_info_t *arg,
struct msi_desc *desc)
{
struct platform_device *pdev = to_platform_device(desc->dev);
arg->desc = desc;
arg->hwirq = TO_HWIRQ(pdev->id, desc->inta.dev_index);
}
static struct msi_domain_ops ti_sci_inta_msi_ops = {
.set_desc = ti_sci_inta_msi_set_desc,
};
static struct msi_domain_info ti_sci_inta_msi_domain_info = {
.flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
MSI_FLAG_LEVEL_CAPABLE),
.ops = &ti_sci_inta_msi_ops,
.chip = &ti_sci_inta_msi_irq_chip,
};
static int ti_sci_inta_irq_domain_probe(struct platform_device *pdev)
{
struct irq_domain *parent_domain, *domain;
struct irq_domain *parent_domain, *domain, *msi_domain;
struct device_node *parent_node, *node;
struct ti_sci_inta_irq_domain *inta;
struct device *dev = &pdev->dev;
@ -551,6 +580,15 @@ static int ti_sci_inta_irq_domain_probe(struct platform_device *pdev)
return -ENOMEM;
}
msi_domain = ti_sci_inta_msi_create_irq_domain(of_node_to_fwnode(node),
&ti_sci_inta_msi_domain_info,
domain);
if (!msi_domain) {
irq_domain_remove(domain);
dev_err(dev, "Failed to allocate msi domain\n");
return -ENOMEM;
}
INIT_LIST_HEAD(&inta->vint_list);
mutex_init(&inta->vint_mutex);