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-rw-r--r--include/asm-powerpc/vio.h27
1 files changed, 25 insertions, 2 deletions
diff --git a/include/asm-powerpc/vio.h b/include/asm-powerpc/vio.h
index 56512a968da..0a290a19594 100644
--- a/include/asm-powerpc/vio.h
+++ b/include/asm-powerpc/vio.h
@@ -39,16 +39,32 @@
#define VIO_IRQ_DISABLE 0UL
#define VIO_IRQ_ENABLE 1UL
+/*
+ * VIO CMO minimum entitlement for all devices and spare entitlement
+ */
+#define VIO_CMO_MIN_ENT 1562624
+
struct iommu_table;
-/*
- * The vio_dev structure is used to describe virtual I/O devices.
+/**
+ * vio_dev - This structure is used to describe virtual I/O devices.
+ *
+ * @desired: set from return of driver's get_desired_dma() function
+ * @entitled: bytes of IO data that has been reserved for this device.
+ * @allocated: bytes of IO data currently in use by the device.
+ * @allocs_failed: number of DMA failures due to insufficient entitlement.
*/
struct vio_dev {
const char *name;
const char *type;
uint32_t unit_address;
unsigned int irq;
+ struct {
+ size_t desired;
+ size_t entitled;
+ size_t allocated;
+ atomic_t allocs_failed;
+ } cmo;
struct device dev;
};
@@ -56,12 +72,19 @@ struct vio_driver {
const struct vio_device_id *id_table;
int (*probe)(struct vio_dev *dev, const struct vio_device_id *id);
int (*remove)(struct vio_dev *dev);
+ /* A driver must have a get_desired_dma() function to
+ * be loaded in a CMO environment if it uses DMA.
+ */
+ unsigned long (*get_desired_dma)(struct vio_dev *dev);
struct device_driver driver;
};
extern int vio_register_driver(struct vio_driver *drv);
extern void vio_unregister_driver(struct vio_driver *drv);
+extern int vio_cmo_entitlement_update(size_t);
+extern void vio_cmo_set_dev_desired(struct vio_dev *viodev, size_t desired);
+
extern void __devinit vio_unregister_device(struct vio_dev *dev);
struct device_node;