[PATCH v5 03/19] device core: Introduce per-device MSI domain pointer

Marc Zyngier
2015-07-23T09:31:35Z

As MSI-type features are creeping into non-PCI devices, it is
starting to make sense to give our struct device some form of
support for this, by allowing a pointer to an MSI irq domain to
be set/retrieved.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
include/linux/device.h | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)

diff --git a/include/linux/device.h b/include/linux/device.h
index 22227e7..7c49b48 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -714,6 +714,7 @@ struct device_dma_parameters {
* @pins: For device pin management.
* See Documentation/pinctrl.txt for details.
* @msi_list: Hosts MSI descriptors
+ * @msi_domain: The generic MSI domain this device is using.
* @numa_node: NUMA node this device is close to.
* @dma_mask: Dma mask (if dma'ble device).
* @coherent_dma_mask: Like dma_mask, but for alloc_coherent mapping as not all
@@ -774,6 +775,9 @@ struct device {
struct dev_pm_info power;
struct dev_pm_domain *pm_domain;

+#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
+ struct irq_domain *msi_domain; /* MSI domain device uses */
+#endif
#ifdef CONFIG_PINCTRL
struct dev_pin_info *pins;
#endif
@@ -864,6 +868,22 @@ static inline void set_dev_node(struct device *dev, int node)
}
#endif

+static inline struct irq_domain *dev_get_msi_domain(const struct device *dev)
+{
+#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
+ return dev->msi_domain;
+#else
+ return NULL;
+#endif
+}
+
+static inline void dev_set_msi_domain(struct device *dev, struct irq_domain *d)
+{
+#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
+ dev->msi_domain = d;
+#endif
+}
+
static inline void *dev_get_drvdata(const struct device *dev)
{
return dev->driver_data;
--
2.1.4