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authorLokesh Vutla <lokeshvutla@ti.com>2019-04-30 15:42:29 +0530
committerMarc Zyngier <marc.zyngier@arm.com>2019-05-01 10:49:17 +0100
commitf011df6179bdffac63987f009d25dd79b6e2df23 (patch)
treee6dfeda3708c0d0b496a7cbfb7c77511b4649521 /drivers/irqchip/irq-ti-sci-inta.c
parent49b323157bf1e70bfb3114a463d340399906c43a (diff)
downloadlinux-f011df6179bdffac63987f009d25dd79b6e2df23.tar.bz2
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>
Diffstat (limited to 'drivers/irqchip/irq-ti-sci-inta.c')
-rw-r--r--drivers/irqchip/irq-ti-sci-inta.c40
1 files changed, 39 insertions, 1 deletions
diff --git a/drivers/irqchip/irq-ti-sci-inta.c b/drivers/irqchip/irq-ti-sci-inta.c
index 87e0abe0041f..011b60a49e3f 100644
--- a/drivers/irqchip/irq-ti-sci-inta.c
+++ b/drivers/irqchip/irq-ti-sci-inta.c
@@ -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);