1 files changed, 110 insertions, 0 deletions
diff --git a/drivers/staging/hv/storvsc_api.h b/drivers/staging/hv/storvsc_api.h
new file mode 100644
index 000000000000..0063bde9a4b2
--- /dev/null
+++ b/drivers/staging/hv/storvsc_api.h
@@ -0,0 +1,110 @@
+/*
+ *
+ * Copyright (c) 2009, Microsoft Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ *   Haiyang Zhang <haiyangz@microsoft.com>
+ *   Hank Janssen  <hjanssen@microsoft.com>
+ *
+ */
+
+
+#ifndef _STORVSC_API_H_
+#define _STORVSC_API_H_
+
+#include "vmbus_api.h"
+
+/* Defines */
+#define STORVSC_RING_BUFFER_SIZE			(10*PAGE_SIZE)
+#define BLKVSC_RING_BUFFER_SIZE				(20*PAGE_SIZE)
+
+#define STORVSC_MAX_IO_REQUESTS				64
+
+/*
+ * In Hyper-V, each port/path/target maps to 1 scsi host adapter.  In
+ * reality, the path/target is not used (ie always set to 0) so our
+ * scsi host adapter essentially has 1 bus with 1 target that contains
+ * up to 256 luns.
+ */
+#define STORVSC_MAX_LUNS_PER_TARGET			64
+#define STORVSC_MAX_TARGETS				1
+#define STORVSC_MAX_CHANNELS				1
+
+struct hv_storvsc_request;
+
+/* Matches Windows-end */
+enum storvsc_request_type{
+	WRITE_TYPE,
+	READ_TYPE,
+	UNKNOWN_TYPE,
+};
+
+struct hv_storvsc_request {
+	enum storvsc_request_type Type;
+	u32 Host;
+	u32 Bus;
+	u32 TargetId;
+	u32 LunId;
+	u8 *Cdb;
+	u32 CdbLen;
+	u32 Status;
+	u32 BytesXfer;
+
+	unsigned char *SenseBuffer;
+	u32 SenseBufferSize;
+
+	void *Context;
+
+	void (*OnIOCompletion)(struct hv_storvsc_request *Request);
+
+	/* This points to the memory after DataBuffer */
+	void *Extension;
+
+	struct hv_multipage_buffer DataBuffer;
+};
+
+/* Represents the block vsc driver */
+struct storvsc_driver_object {
+	/* Must be the first field */
+	/* Which is a bug FIXME! */
+	struct hv_driver Base;
+
+	/* Set by caller (in bytes) */
+	u32 RingBufferSize;
+
+	/* Allocate this much private extension for each I/O request */
+	u32 RequestExtSize;
+
+	/* Maximum # of requests in flight per channel/device */
+	u32 MaxOutstandingRequestsPerChannel;
+
+	/* Specific to this driver */
+	int (*OnIORequest)(struct hv_device *Device,
+			   struct hv_storvsc_request *Request);
+};
+
+struct storvsc_device_info {
+	unsigned int PortNumber;
+	unsigned char PathId;
+	unsigned char TargetId;
+};
+
+/* Interface */
+int StorVscInitialize(struct hv_driver *driver);
+int StorVscOnHostReset(struct hv_device *Device);
+int BlkVscInitialize(struct hv_driver *driver);
+
+#endif /* _STORVSC_API_H_ */