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Message-Id: <1304978288-22999-172-git-send-email-kys@microsoft.com>
Date: Mon, 9 May 2011 14:57:34 -0700
From: "K. Y. Srinivasan" <kys@...rosoft.com>
To: gregkh@...e.de, linux-kernel@...r.kernel.org,
devel@...uxdriverproject.org, virtualization@...ts.osdl.org
Cc: "K. Y. Srinivasan" <kys@...rosoft.com>,
Haiyang Zhang <haiyangz@...rosoft.com>,
Abhishek Kane <v-abkane@...rosoft.com>,
Hank Janssen <hjanssen@...rosoft.com>
Subject: [PATCH 172/206] Staging: hv: Include the contents of vstorage.h
The subject line says it all.
Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
Signed-off-by: Abhishek Kane <v-abkane@...rosoft.com>
Signed-off-by: Hank Janssen <hjanssen@...rosoft.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@...rosoft.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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