Staging: hv: storvsc: Add the contents of hyperv_storage.h to storvsc_drv.c
authorK. Y. Srinivasan <kys@microsoft.com>
Sat, 27 Aug 2011 18:31:24 +0000 (11:31 -0700)
committerGreg Kroah-Hartman <gregkh@suse.de>
Mon, 29 Aug 2011 18:01:08 +0000 (11:01 -0700)
As part of further cleanup of storvsc, add the contents of hyperv_storage.h
to storvsc_drv.c and do the necessary adjustments.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/staging/hv/hyperv_storage.h [deleted file]
drivers/staging/hv/storvsc_drv.c

diff --git a/drivers/staging/hv/hyperv_storage.h b/drivers/staging/hv/hyperv_storage.h
deleted file mode 100644 (file)
index 687cdc5..0000000
+++ /dev/null
@@ -1,322 +0,0 @@
-/*
- *
- * Copyright (c) 2011, 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>
- *   K. Y. Srinivasan <kys@microsoft.com>
- *
- */
-
-#ifndef _HYPERV_STORAGE_H
-#define _HYPERV_STORAGE_H
-
-
-/* vstorage.w revision number.  This is used in the case of a version match, */
-/* to alert the user that structure sizes may be mismatched even though the */
-/* protocol versions match. */
-
-
-#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)
-
-
-#include <linux/kernel.h>
-#include <linux/wait.h>
-#include "hyperv_storage.h"
-#include "hyperv.h"
-
-/* Defines */
-#define STORVSC_RING_BUFFER_SIZE                       (20*PAGE_SIZE)
-#define BLKVSC_RING_BUFFER_SIZE                                (20*PAGE_SIZE)
-
-#define STORVSC_MAX_IO_REQUESTS                                128
-
-/*
- * 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 {
-       struct hv_storvsc_request *request;
-       struct hv_device *device;
-
-       /* Synchronize the request/response if needed */
-       struct completion wait_event;
-
-       unsigned char *sense_buffer;
-       void *context;
-       void (*on_io_completion)(struct hv_storvsc_request *request);
-       struct hv_multipage_buffer data_buffer;
-
-       struct vstor_packet vstor_packet;
-};
-
-
-struct storvsc_device_info {
-       u32 ring_buffer_size;
-       unsigned int port_number;
-       unsigned char path_id;
-       unsigned char target_id;
-};
-
-struct storvsc_major_info {
-       int major;
-       int index;
-       bool do_register;
-       char *devname;
-       char *diskname;
-};
-
-/* A storvsc device is a device object that contains a vmbus channel */
-struct storvsc_device {
-       struct hv_device *device;
-
-       bool     destroy;
-       bool     drain_notify;
-       atomic_t num_outstanding_req;
-
-       wait_queue_head_t waiting_to_drain;
-
-       /*
-        * Each unique Port/Path/Target represents 1 channel ie scsi
-        * controller. In reality, the pathid, targetid is always 0
-        * and the port is set by us
-        */
-       unsigned int port_number;
-       unsigned char path_id;
-       unsigned char target_id;
-
-       /* Used for vsc/vsp channel reset process */
-       struct hv_storvsc_request init_request;
-       struct hv_storvsc_request reset_request;
-};
-
-
-static inline struct storvsc_device *get_out_stor_device(
-                                       struct hv_device *device)
-{
-       struct storvsc_device *stor_device;
-
-       stor_device = (struct storvsc_device *)device->ext;
-
-       if (stor_device && stor_device->destroy)
-               stor_device = NULL;
-
-       return stor_device;
-}
-
-
-static inline void storvsc_wait_to_drain(struct storvsc_device *dev)
-{
-       dev->drain_notify = true;
-       wait_event(dev->waiting_to_drain,
-                  atomic_read(&dev->num_outstanding_req) == 0);
-       dev->drain_notify = false;
-}
-
-/* Interface */
-
-int storvsc_dev_add(struct hv_device *device,
-                               void *additional_info);
-int storvsc_dev_remove(struct hv_device *device);
-
-int storvsc_do_io(struct hv_device *device,
-                               struct hv_storvsc_request *request);
-
-int storvsc_get_major_info(struct storvsc_device_info *device_info,
-                               struct storvsc_major_info *major_info);
-
-#endif /* _HYPERV_STORAGE_H */
index 096f615a92ecd58b67d25921ca87b9d3eafa2cd8..4a95f8be8078bb3f00edf30be6ca55f23543c29b 100644 (file)
@@ -21,6 +21,7 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/wait.h>
 #include <linux/sched.h>
 #include <linux/completion.h>
 #include <linux/string.h>
 #include <scsi/scsi_dbg.h>
 
 #include "hyperv.h"
-#include "hyperv_storage.h"
+
+/* to alert the user that structure sizes may be mismatched even though the */
+/* protocol versions match. */
+
+
+#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)
+
+
+/* Defines */
+#define STORVSC_RING_BUFFER_SIZE                       (20*PAGE_SIZE)
+#define BLKVSC_RING_BUFFER_SIZE                                (20*PAGE_SIZE)
+
+#define STORVSC_MAX_IO_REQUESTS                                128
+
+/*
+ * 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 {
+       struct hv_storvsc_request *request;
+       struct hv_device *device;
+
+       /* Synchronize the request/response if needed */
+       struct completion wait_event;
+
+       unsigned char *sense_buffer;
+       void *context;
+       void (*on_io_completion)(struct hv_storvsc_request *request);
+       struct hv_multipage_buffer data_buffer;
+
+       struct vstor_packet vstor_packet;
+};
+
+
+struct storvsc_device_info {
+       u32 ring_buffer_size;
+       unsigned int port_number;
+       unsigned char path_id;
+       unsigned char target_id;
+};
+
+struct storvsc_major_info {
+       int major;
+       int index;
+       bool do_register;
+       char *devname;
+       char *diskname;
+};
+
+/* A storvsc device is a device object that contains a vmbus channel */
+struct storvsc_device {
+       struct hv_device *device;
+
+       bool     destroy;
+       bool     drain_notify;
+       atomic_t num_outstanding_req;
+
+       wait_queue_head_t waiting_to_drain;
+
+       /*
+        * Each unique Port/Path/Target represents 1 channel ie scsi
+        * controller. In reality, the pathid, targetid is always 0
+        * and the port is set by us
+        */
+       unsigned int port_number;
+       unsigned char path_id;
+       unsigned char target_id;
+
+       /* Used for vsc/vsp channel reset process */
+       struct hv_storvsc_request init_request;
+       struct hv_storvsc_request reset_request;
+};
+
+
+static inline struct storvsc_device *get_out_stor_device(
+                                       struct hv_device *device)
+{
+       struct storvsc_device *stor_device;
+
+       stor_device = (struct storvsc_device *)device->ext;
+
+       if (stor_device && stor_device->destroy)
+               stor_device = NULL;
+
+       return stor_device;
+}
+
+
+static inline void storvsc_wait_to_drain(struct storvsc_device *dev)
+{
+       dev->drain_notify = true;
+       wait_event(dev->waiting_to_drain,
+                  atomic_read(&dev->num_outstanding_req) == 0);
+       dev->drain_notify = false;
+}
 
 
 static int storvsc_ringbuffer_size = STORVSC_RING_BUFFER_SIZE;