[PATCH 172/206] Staging: hv: Include the contents of vstorage.h to hyperv_storage.h

K. Y. Srinivasan kys at microsoft.com
Tue May 10 14:56:38 UTC 2011


The subject line says it all.

Signed-off-by: K. Y. Srinivasan <kys at microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz at microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane at microsoft.com>
Signed-off-by: Hank Janssen <hjanssen at microsoft.com>
---
 drivers/staging/hv/hyperv_storage.h |  178 +++++++++++++++++++++++++++++++++++
 1 files changed, 178 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/hv/hyperv_storage.h b/drivers/staging/hv/hyperv_storage.h
index ce27244..4324493 100644
--- a/drivers/staging/hv/hyperv_storage.h
+++ b/drivers/staging/hv/hyperv_storage.h
@@ -21,3 +21,181 @@
  *   K. Y. Srinivasan <kys at microsoft.com>
  *
  */
+
+/*
+ * vstorage.w revision number.  This is used in the case
+ * of a version match, to alert the user that structure sizes may
+ * to alert the user that structure sizes may be mismatched even though the
+ * protocol versions match.
+ */
+
+#ifndef _HYPERV_STORAGE_H
+#define _HYPERV_STORAGE_H
+
+#define REVISION_STRING(REVISION_) #REVISION_
+#define FILL_VMSTOR_REVISION(RESULT_LVALUE_)				\
+	do {								\
+		char *revision_string					\
+			= REVISION_STRING($Rev : 6 $) + 6;		\
+		RESULT_LVALUE_ = 0;					\
+		while (*revision_string >= '0'				\
+			&& *revision_string <= '9') {			\
+			RESULT_LVALUE_ *= 10;				\
+			RESULT_LVALUE_ += *revision_string - '0';	\
+			revision_string++;				\
+		}							\
+	} while (0)
+
+/* Major/minor macros.  Minor version is in LSB, meaning that earlier flat */
+/* version numbers will be interpreted as "0.x" (i.e., 1 becomes 0.1). */
+#define VMSTOR_PROTOCOL_MAJOR(VERSION_)		(((VERSION_) >> 8) & 0xff)
+#define VMSTOR_PROTOCOL_MINOR(VERSION_)		(((VERSION_))      & 0xff)
+#define VMSTOR_PROTOCOL_VERSION(MAJOR_, MINOR_)	((((MAJOR_) & 0xff) << 8) | \
+						 (((MINOR_) & 0xff)))
+#define VMSTOR_INVALID_PROTOCOL_VERSION		(-1)
+
+/* Version history: */
+/* V1 Beta                    0.1 */
+/* V1 RC < 2008/1/31          1.0 */
+/* V1 RC > 2008/1/31          2.0 */
+#define VMSTOR_PROTOCOL_VERSION_CURRENT VMSTOR_PROTOCOL_VERSION(2, 0)
+
+
+
+
+/*  This will get replaced with the max transfer length that is possible on */
+/*  the host adapter. */
+/*  The max transfer length will be published when we offer a vmbus channel. */
+#define MAX_TRANSFER_LENGTH	0x40000
+#define DEFAULT_PACKET_SIZE (sizeof(struct vmdata_gpa_direct) +	\
+			sizeof(struct vstor_packet) +		\
+			sizesizeof(u64) * (MAX_TRANSFER_LENGTH / PAGE_SIZE)))
+
+
+/*  Packet structure describing virtual storage requests. */
+enum vstor_packet_operation {
+	VSTOR_OPERATION_COMPLETE_IO		= 1,
+	VSTOR_OPERATION_REMOVE_DEVICE		= 2,
+	VSTOR_OPERATION_EXECUTE_SRB		= 3,
+	VSTOR_OPERATION_RESET_LUN		= 4,
+	VSTOR_OPERATION_RESET_ADAPTER		= 5,
+	VSTOR_OPERATION_RESET_BUS		= 6,
+	VSTOR_OPERATION_BEGIN_INITIALIZATION	= 7,
+	VSTOR_OPERATION_END_INITIALIZATION	= 8,
+	VSTOR_OPERATION_QUERY_PROTOCOL_VERSION	= 9,
+	VSTOR_OPERATION_QUERY_PROPERTIES	= 10,
+	VSTOR_OPERATION_MAXIMUM			= 10
+};
+
+/*
+ * Platform neutral description of a scsi request -
+ * this remains the same across the write regardless of 32/64 bit
+ * note: it's patterned off the SCSI_PASS_THROUGH structure
+ */
+#define CDB16GENERIC_LENGTH			0x10
+
+#ifndef SENSE_BUFFER_SIZE
+#define SENSE_BUFFER_SIZE			0x12
+#endif
+
+#define MAX_DATA_BUF_LEN_WITH_PADDING		0x14
+
+struct vmscsi_request {
+	unsigned short length;
+	unsigned char srb_status;
+	unsigned char scsi_status;
+
+	unsigned char port_number;
+	unsigned char path_id;
+	unsigned char target_id;
+	unsigned char lun;
+
+	unsigned char cdb_length;
+	unsigned char sense_info_length;
+	unsigned char data_in;
+	unsigned char reserved;
+
+	unsigned int data_transfer_length;
+
+	union {
+		unsigned char cdb[CDB16GENERIC_LENGTH];
+		unsigned char sense_data[SENSE_BUFFER_SIZE];
+		unsigned char reserved_array[MAX_DATA_BUF_LEN_WITH_PADDING];
+	};
+} __attribute((packed));
+
+
+/*
+ * This structure is sent during the intialization phase to get the different
+ * properties of the channel.
+ */
+struct vmstorage_channel_properties {
+	unsigned short protocol_version;
+	unsigned char path_id;
+	unsigned char target_id;
+
+	/* Note: port number is only really known on the client side */
+	unsigned int port_number;
+	unsigned int flags;
+	unsigned int max_transfer_bytes;
+
+	/*  This id is unique for each channel and will correspond with */
+	/*  vendor specific data in the inquirydata */
+	unsigned long long unique_id;
+} __packed;
+
+/*  This structure is sent during the storage protocol negotiations. */
+struct vmstorage_protocol_version {
+	/* Major (MSW) and minor (LSW) version numbers. */
+	unsigned short major_minor;
+
+	/*
+	 * Revision number is auto-incremented whenever this file is changed
+	 * (See FILL_VMSTOR_REVISION macro above).  Mismatch does not
+	 * definitely indicate incompatibility--but it does indicate mismatched
+	 * builds.
+	 */
+	unsigned short revision;
+} __packed;
+
+/* Channel Property Flags */
+#define STORAGE_CHANNEL_REMOVABLE_FLAG		0x1
+#define STORAGE_CHANNEL_EMULATED_IDE_FLAG	0x2
+
+struct vstor_packet {
+	/* Requested operation type */
+	enum vstor_packet_operation operation;
+
+	/*  Flags - see below for values */
+	unsigned int flags;
+
+	/* Status of the request returned from the server side. */
+	unsigned int status;
+
+	/* Data payload area */
+	union {
+		/*
+		 * Structure used to forward SCSI commands from the
+		 * client to the server.
+		 */
+		struct vmscsi_request vm_srb;
+
+		/* Structure used to query channel properties. */
+		struct vmstorage_channel_properties storage_channel_properties;
+
+		/* Used during version negotiations. */
+		struct vmstorage_protocol_version version;
+	};
+} __packed;
+
+/* Packet flags */
+/*
+ * This flag indicates that the server should send back a completion for this
+ * packet.
+ */
+#define REQUEST_COMPLETION_FLAG	0x1
+
+/*  This is the set of flags that the vsc can set in any packets it sends */
+#define VSC_LEGAL_FLAGS		(REQUEST_COMPLETION_FLAG)
+
+#endif /* _HYPERV_STORAGE_H */
-- 
1.7.4.1




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