The subject line says it all.
Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
Signed-off-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
Signed-off-by: Abhishek Kane <v-abkane@xxxxxxxxxxxxx>
Signed-off-by: Hank Janssen <hjanssen@xxxxxxxxxxxxx>
---
drivers/staging/hv/hyperv_vmbus.h | 93 +++++++++++++++++++++++++++++++++++++
1 files changed, 93 insertions(+), 0 deletions(-)
diff --git a/drivers/staging/hv/hyperv_vmbus.h b/drivers/staging/hv/hyperv_vmbus.h
index bd943fe..8ccae84 100644
--- a/drivers/staging/hv/hyperv_vmbus.h
+++ b/drivers/staging/hv/hyperv_vmbus.h
@@ -533,4 +533,97 @@ void hv_dump_ring_info(struct hv_ring_buffer_info *ring_info, char *prefix);
void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
struct hv_ring_buffer_debug_info *debug_info);
+
+#include <asm/sync_bitops.h>
+
+
+/*
+ * Maximum channels is determined by the size of the interrupt page
+ * which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt
+ * and the other is receive endpoint interrupt
+ */
+#define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3) /* 16348 channels */
+
+/* The value here must be in multiple of 32 */
+/* TODO: Need to make this configurable */
+#define MAX_NUM_CHANNELS_SUPPORTED 256
+
+
+enum vmbus_connect_state {
+ DISCONNECTED,
+ CONNECTING,
+ CONNECTED,
+ DISCONNECTING
+};
+
+#define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT
+
+struct vmbus_connection {
+ enum vmbus_connect_state conn_state;
+
+ atomic_t next_gpadl_handle;
+
+ /*
+ * Represents channel interrupts. Each bit position represents a
+ * channel. When a channel sends an interrupt via VMBUS, it finds its
+ * bit in the sendInterruptPage, set it and calls Hv to generate a port
+ * event. The other end receives the port event and parse the
+ * recvInterruptPage to see which bit is set
+ */
+ void *int_page;
+ void *send_int_page;
+ void *recv_int_page;
+
+ /*
+ * 2 pages - 1st page for parent->child notification and 2nd
+ * is child->parent notification
+ */
+ void *monitor_pages;
+ struct list_head chn_msg_list;
+ spinlock_t channelmsg_lock;
+
+ /* List of channels */
+ struct list_head chn_list;
+ spinlock_t channel_lock;
+
+ struct workqueue_struct *work_queue;
+};
+
+
+struct vmbus_msginfo {
+ /* Bookkeeping stuff */
+ struct list_head msglist_entry;
+
+ /* The message itself */
+ unsigned char msg[0];
+};
+
+
+extern struct vmbus_connection vmbus_connection;
+
+/* General vmbus interface */
+
+struct hv_device *vmbus_child_device_create(struct hv_guid *type,
+ struct hv_guid *instance,
+ struct vmbus_channel *channel);
+
+int vmbus_child_device_register(struct hv_device *child_device_obj);
+void vmbus_child_device_unregister(struct hv_device *device_obj);
+
+struct vmbus_channel *relid2channel(u32 relid);
+
+
+/* Connection interface */
+
+int vmbus_connect(void);
+
+int vmbus_disconnect(void);
+
+int vmbus_post_msg(void *buffer, size_t buflen);
+
+int vmbus_set_event(u32 child_relid);
+
+void vmbus_on_event(unsigned long data);
+
+
#endif /* _HYPERV_VMBUS_H */
--
1.7.4.1
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