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Commit f0d79fe9 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
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Staging: hv: storvsc: Add the contents of hyperv_storage.h to storvsc_drv.c 

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: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent a1be1706
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Showing with 276 additions and 323 deletions
drivers/staging/hv/hyperv_storage.h deleted 100644 → 0
View file @ a1be1706
/*
*
* 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 */
drivers/staging/hv/storvsc_drv.c
View file @ f0d79fe9
...@@ -21,6 +21,7 @@ ...@@ -21,6 +21,7 @@
*/ */
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/wait.h>
#include <linux/sched.h> #include <linux/sched.h>
#include <linux/completion.h> #include <linux/completion.h>
#include <linux/string.h> #include <linux/string.h>
...@@ -40,7 +41,281 @@ ...@@ -40,7 +41,281 @@
#include <scsi/scsi_dbg.h> #include <scsi/scsi_dbg.h>
#include "hyperv.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; static int storvsc_ringbuffer_size = STORVSC_RING_BUFFER_SIZE;
......
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