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: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
K. Y. Srinivasan
Greg Kroah-Hartman
parent
a1be1706ed
commit
f0d79fe9c5
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@ -1,322 +0,0 @@
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/*
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*
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* Copyright (c) 2011, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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* K. Y. Srinivasan <kys@microsoft.com>
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*
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*/
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#ifndef _HYPERV_STORAGE_H
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#define _HYPERV_STORAGE_H
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/* vstorage.w revision number. This is used in the case of a version match, */
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/* to alert the user that structure sizes may be mismatched even though the */
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/* protocol versions match. */
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#define REVISION_STRING(REVISION_) #REVISION_
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#define FILL_VMSTOR_REVISION(RESULT_LVALUE_) \
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do { \
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char *revision_string \
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= REVISION_STRING($Rev : 6 $) + 6; \
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RESULT_LVALUE_ = 0; \
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while (*revision_string >= '0' \
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&& *revision_string <= '9') { \
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RESULT_LVALUE_ *= 10; \
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RESULT_LVALUE_ += *revision_string - '0'; \
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revision_string++; \
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} \
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} while (0)
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/* Major/minor macros. Minor version is in LSB, meaning that earlier flat */
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/* version numbers will be interpreted as "0.x" (i.e., 1 becomes 0.1). */
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#define VMSTOR_PROTOCOL_MAJOR(VERSION_) (((VERSION_) >> 8) & 0xff)
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#define VMSTOR_PROTOCOL_MINOR(VERSION_) (((VERSION_)) & 0xff)
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#define VMSTOR_PROTOCOL_VERSION(MAJOR_, MINOR_) ((((MAJOR_) & 0xff) << 8) | \
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(((MINOR_) & 0xff)))
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#define VMSTOR_INVALID_PROTOCOL_VERSION (-1)
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/* Version history: */
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/* V1 Beta 0.1 */
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/* V1 RC < 2008/1/31 1.0 */
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/* V1 RC > 2008/1/31 2.0 */
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#define VMSTOR_PROTOCOL_VERSION_CURRENT VMSTOR_PROTOCOL_VERSION(2, 0)
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/* This will get replaced with the max transfer length that is possible on */
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/* the host adapter. */
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/* The max transfer length will be published when we offer a vmbus channel. */
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#define MAX_TRANSFER_LENGTH 0x40000
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#define DEFAULT_PACKET_SIZE (sizeof(struct vmdata_gpa_direct) + \
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sizeof(struct vstor_packet) + \
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sizesizeof(u64) * (MAX_TRANSFER_LENGTH / PAGE_SIZE)))
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/* Packet structure describing virtual storage requests. */
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enum vstor_packet_operation {
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VSTOR_OPERATION_COMPLETE_IO = 1,
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VSTOR_OPERATION_REMOVE_DEVICE = 2,
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VSTOR_OPERATION_EXECUTE_SRB = 3,
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VSTOR_OPERATION_RESET_LUN = 4,
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VSTOR_OPERATION_RESET_ADAPTER = 5,
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VSTOR_OPERATION_RESET_BUS = 6,
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VSTOR_OPERATION_BEGIN_INITIALIZATION = 7,
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VSTOR_OPERATION_END_INITIALIZATION = 8,
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VSTOR_OPERATION_QUERY_PROTOCOL_VERSION = 9,
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VSTOR_OPERATION_QUERY_PROPERTIES = 10,
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VSTOR_OPERATION_MAXIMUM = 10
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};
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/*
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* Platform neutral description of a scsi request -
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* this remains the same across the write regardless of 32/64 bit
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* note: it's patterned off the SCSI_PASS_THROUGH structure
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*/
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#define CDB16GENERIC_LENGTH 0x10
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#ifndef SENSE_BUFFER_SIZE
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#define SENSE_BUFFER_SIZE 0x12
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#endif
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#define MAX_DATA_BUF_LEN_WITH_PADDING 0x14
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struct vmscsi_request {
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unsigned short length;
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unsigned char srb_status;
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unsigned char scsi_status;
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unsigned char port_number;
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unsigned char path_id;
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unsigned char target_id;
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unsigned char lun;
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unsigned char cdb_length;
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unsigned char sense_info_length;
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unsigned char data_in;
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unsigned char reserved;
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unsigned int data_transfer_length;
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union {
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unsigned char cdb[CDB16GENERIC_LENGTH];
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unsigned char sense_data[SENSE_BUFFER_SIZE];
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unsigned char reserved_array[MAX_DATA_BUF_LEN_WITH_PADDING];
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};
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} __attribute((packed));
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/*
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* This structure is sent during the intialization phase to get the different
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* properties of the channel.
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*/
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struct vmstorage_channel_properties {
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unsigned short protocol_version;
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unsigned char path_id;
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unsigned char target_id;
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/* Note: port number is only really known on the client side */
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unsigned int port_number;
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unsigned int flags;
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unsigned int max_transfer_bytes;
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/* This id is unique for each channel and will correspond with */
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/* vendor specific data in the inquirydata */
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unsigned long long unique_id;
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} __packed;
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/* This structure is sent during the storage protocol negotiations. */
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struct vmstorage_protocol_version {
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/* Major (MSW) and minor (LSW) version numbers. */
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unsigned short major_minor;
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/*
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* Revision number is auto-incremented whenever this file is changed
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* (See FILL_VMSTOR_REVISION macro above). Mismatch does not
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* definitely indicate incompatibility--but it does indicate mismatched
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* builds.
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*/
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unsigned short revision;
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} __packed;
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/* Channel Property Flags */
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#define STORAGE_CHANNEL_REMOVABLE_FLAG 0x1
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#define STORAGE_CHANNEL_EMULATED_IDE_FLAG 0x2
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struct vstor_packet {
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/* Requested operation type */
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enum vstor_packet_operation operation;
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/* Flags - see below for values */
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unsigned int flags;
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/* Status of the request returned from the server side. */
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unsigned int status;
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/* Data payload area */
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union {
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/*
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* Structure used to forward SCSI commands from the
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* client to the server.
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*/
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struct vmscsi_request vm_srb;
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/* Structure used to query channel properties. */
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struct vmstorage_channel_properties storage_channel_properties;
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/* Used during version negotiations. */
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struct vmstorage_protocol_version version;
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};
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} __packed;
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/* Packet flags */
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/*
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* This flag indicates that the server should send back a completion for this
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* packet.
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*/
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#define REQUEST_COMPLETION_FLAG 0x1
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/* This is the set of flags that the vsc can set in any packets it sends */
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#define VSC_LEGAL_FLAGS (REQUEST_COMPLETION_FLAG)
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#include <linux/kernel.h>
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#include <linux/wait.h>
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#include "hyperv_storage.h"
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#include "hyperv.h"
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/* Defines */
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#define STORVSC_RING_BUFFER_SIZE (20*PAGE_SIZE)
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#define BLKVSC_RING_BUFFER_SIZE (20*PAGE_SIZE)
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#define STORVSC_MAX_IO_REQUESTS 128
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/*
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* In Hyper-V, each port/path/target maps to 1 scsi host adapter. In
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* reality, the path/target is not used (ie always set to 0) so our
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* scsi host adapter essentially has 1 bus with 1 target that contains
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* up to 256 luns.
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*/
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#define STORVSC_MAX_LUNS_PER_TARGET 64
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#define STORVSC_MAX_TARGETS 1
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#define STORVSC_MAX_CHANNELS 1
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struct hv_storvsc_request;
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/* Matches Windows-end */
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enum storvsc_request_type {
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WRITE_TYPE,
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READ_TYPE,
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UNKNOWN_TYPE,
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};
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struct hv_storvsc_request {
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struct hv_storvsc_request *request;
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struct hv_device *device;
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/* Synchronize the request/response if needed */
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struct completion wait_event;
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unsigned char *sense_buffer;
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void *context;
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void (*on_io_completion)(struct hv_storvsc_request *request);
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struct hv_multipage_buffer data_buffer;
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struct vstor_packet vstor_packet;
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};
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struct storvsc_device_info {
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u32 ring_buffer_size;
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unsigned int port_number;
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unsigned char path_id;
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unsigned char target_id;
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};
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struct storvsc_major_info {
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int major;
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int index;
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bool do_register;
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char *devname;
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char *diskname;
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};
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/* A storvsc device is a device object that contains a vmbus channel */
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struct storvsc_device {
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struct hv_device *device;
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bool destroy;
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bool drain_notify;
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atomic_t num_outstanding_req;
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wait_queue_head_t waiting_to_drain;
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/*
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* Each unique Port/Path/Target represents 1 channel ie scsi
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* controller. In reality, the pathid, targetid is always 0
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* and the port is set by us
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*/
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unsigned int port_number;
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unsigned char path_id;
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unsigned char target_id;
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/* Used for vsc/vsp channel reset process */
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struct hv_storvsc_request init_request;
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struct hv_storvsc_request reset_request;
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};
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static inline struct storvsc_device *get_out_stor_device(
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struct hv_device *device)
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{
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struct storvsc_device *stor_device;
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stor_device = (struct storvsc_device *)device->ext;
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if (stor_device && stor_device->destroy)
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stor_device = NULL;
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return stor_device;
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}
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static inline void storvsc_wait_to_drain(struct storvsc_device *dev)
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{
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dev->drain_notify = true;
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wait_event(dev->waiting_to_drain,
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atomic_read(&dev->num_outstanding_req) == 0);
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dev->drain_notify = false;
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}
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/* Interface */
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int storvsc_dev_add(struct hv_device *device,
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void *additional_info);
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int storvsc_dev_remove(struct hv_device *device);
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int storvsc_do_io(struct hv_device *device,
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struct hv_storvsc_request *request);
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int storvsc_get_major_info(struct storvsc_device_info *device_info,
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struct storvsc_major_info *major_info);
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#endif /* _HYPERV_STORAGE_H */
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@ -21,6 +21,7 @@
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*/
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#include <linux/kernel.h>
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#include <linux/wait.h>
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#include <linux/sched.h>
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#include <linux/completion.h>
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#include <linux/string.h>
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@ -40,7 +41,281 @@
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#include <scsi/scsi_dbg.h>
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#include "hyperv.h"
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#include "hyperv_storage.h"
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/* to alert the user that structure sizes may be mismatched even though the */
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/* protocol versions match. */
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#define REVISION_STRING(REVISION_) #REVISION_
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#define FILL_VMSTOR_REVISION(RESULT_LVALUE_) \
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do { \
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char *revision_string \
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= REVISION_STRING($Rev : 6 $) + 6; \
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RESULT_LVALUE_ = 0; \
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while (*revision_string >= '0' \
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&& *revision_string <= '9') { \
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RESULT_LVALUE_ *= 10; \
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RESULT_LVALUE_ += *revision_string - '0'; \
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revision_string++; \
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} \
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} while (0)
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/* Major/minor macros. Minor version is in LSB, meaning that earlier flat */
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/* version numbers will be interpreted as "0.x" (i.e., 1 becomes 0.1). */
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#define VMSTOR_PROTOCOL_MAJOR(VERSION_) (((VERSION_) >> 8) & 0xff)
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#define VMSTOR_PROTOCOL_MINOR(VERSION_) (((VERSION_)) & 0xff)
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#define VMSTOR_PROTOCOL_VERSION(MAJOR_, MINOR_) ((((MAJOR_) & 0xff) << 8) | \
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(((MINOR_) & 0xff)))
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#define VMSTOR_INVALID_PROTOCOL_VERSION (-1)
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/* Version history: */
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/* V1 Beta 0.1 */
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/* V1 RC < 2008/1/31 1.0 */
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/* V1 RC > 2008/1/31 2.0 */
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#define VMSTOR_PROTOCOL_VERSION_CURRENT VMSTOR_PROTOCOL_VERSION(2, 0)
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/* This will get replaced with the max transfer length that is possible on */
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/* the host adapter. */
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/* The max transfer length will be published when we offer a vmbus channel. */
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#define MAX_TRANSFER_LENGTH 0x40000
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#define DEFAULT_PACKET_SIZE (sizeof(struct vmdata_gpa_direct) + \
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sizeof(struct vstor_packet) + \
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sizesizeof(u64) * (MAX_TRANSFER_LENGTH / PAGE_SIZE)))
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/* Packet structure describing virtual storage requests. */
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enum vstor_packet_operation {
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VSTOR_OPERATION_COMPLETE_IO = 1,
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VSTOR_OPERATION_REMOVE_DEVICE = 2,
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VSTOR_OPERATION_EXECUTE_SRB = 3,
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VSTOR_OPERATION_RESET_LUN = 4,
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VSTOR_OPERATION_RESET_ADAPTER = 5,
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VSTOR_OPERATION_RESET_BUS = 6,
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VSTOR_OPERATION_BEGIN_INITIALIZATION = 7,
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VSTOR_OPERATION_END_INITIALIZATION = 8,
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VSTOR_OPERATION_QUERY_PROTOCOL_VERSION = 9,
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VSTOR_OPERATION_QUERY_PROPERTIES = 10,
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VSTOR_OPERATION_MAXIMUM = 10
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};
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/*
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* Platform neutral description of a scsi request -
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* this remains the same across the write regardless of 32/64 bit
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* note: it's patterned off the SCSI_PASS_THROUGH structure
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*/
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#define CDB16GENERIC_LENGTH 0x10
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#ifndef SENSE_BUFFER_SIZE
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#define SENSE_BUFFER_SIZE 0x12
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#endif
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#define MAX_DATA_BUF_LEN_WITH_PADDING 0x14
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struct vmscsi_request {
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unsigned short length;
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unsigned char srb_status;
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unsigned char scsi_status;
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unsigned char port_number;
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unsigned char path_id;
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unsigned char target_id;
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unsigned char lun;
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unsigned char cdb_length;
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unsigned char sense_info_length;
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unsigned char data_in;
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unsigned char reserved;
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unsigned int data_transfer_length;
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union {
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unsigned char cdb[CDB16GENERIC_LENGTH];
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unsigned char sense_data[SENSE_BUFFER_SIZE];
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unsigned char reserved_array[MAX_DATA_BUF_LEN_WITH_PADDING];
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};
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} __attribute((packed));
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/*
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* This structure is sent during the intialization phase to get the different
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* properties of the channel.
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*/
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struct vmstorage_channel_properties {
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unsigned short protocol_version;
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unsigned char path_id;
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unsigned char target_id;
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/* Note: port number is only really known on the client side */
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unsigned int port_number;
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unsigned int flags;
|
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unsigned int max_transfer_bytes;
|
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|
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/* This id is unique for each channel and will correspond with */
|
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/* vendor specific data in the inquirydata */
|
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unsigned long long unique_id;
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} __packed;
|
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|
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/* This structure is sent during the storage protocol negotiations. */
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struct vmstorage_protocol_version {
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/* Major (MSW) and minor (LSW) version numbers. */
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unsigned short major_minor;
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/*
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* Revision number is auto-incremented whenever this file is changed
|
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* (See FILL_VMSTOR_REVISION macro above). Mismatch does not
|
||||
* definitely indicate incompatibility--but it does indicate mismatched
|
||||
* builds.
|
||||
*/
|
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unsigned short revision;
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} __packed;
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/* Channel Property Flags */
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#define STORAGE_CHANNEL_REMOVABLE_FLAG 0x1
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#define STORAGE_CHANNEL_EMULATED_IDE_FLAG 0x2
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struct vstor_packet {
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/* Requested operation type */
|
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enum vstor_packet_operation operation;
|
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|
||||
/* Flags - see below for values */
|
||||
unsigned int flags;
|
||||
|
||||
/* Status of the request returned from the server side. */
|
||||
unsigned int status;
|
||||
|
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/* Data payload area */
|
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union {
|
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/*
|
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* Structure used to forward SCSI commands from the
|
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* client to the server.
|
||||
*/
|
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struct vmscsi_request vm_srb;
|
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|
||||
/* 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;
|
||||
|
|
|
|||
Loading…
Reference in New Issue