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f25c749bb8
function pointer typedefs are allowed in the kernel, but only if they make sense, which they really do not here, as they are not passed around with any kind of frequency. So just spell them all out, it makes the code smaller and easier to understand overall. Cc: Hank Janssen <hjanssen@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
/*
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*
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* Copyright (c) 2009, 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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*
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*/
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#ifndef _STORVSC_API_H_
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#define _STORVSC_API_H_
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#include "VmbusApi.h"
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/* Defines */
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#define STORVSC_RING_BUFFER_SIZE (10*PAGE_SIZE)
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#define BLKVSC_RING_BUFFER_SIZE (20*PAGE_SIZE)
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#define STORVSC_MAX_IO_REQUESTS 64
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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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enum storvsc_request_type Type;
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u32 Host;
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u32 Bus;
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u32 TargetId;
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u32 LunId;
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u8 *Cdb;
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u32 CdbLen;
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u32 Status;
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u32 BytesXfer;
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unsigned char *SenseBuffer;
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u32 SenseBufferSize;
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void *Context;
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void (*OnIOCompletion)(struct hv_storvsc_request *Request);
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/* This points to the memory after DataBuffer */
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void *Extension;
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struct hv_multipage_buffer DataBuffer;
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};
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/* Represents the block vsc driver */
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struct storvsc_driver_object {
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/* Must be the first field */
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/* Which is a bug FIXME! */
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struct hv_driver Base;
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/* Set by caller (in bytes) */
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u32 RingBufferSize;
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/* Allocate this much private extension for each I/O request */
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u32 RequestExtSize;
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/* Maximum # of requests in flight per channel/device */
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u32 MaxOutstandingRequestsPerChannel;
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/* Set by the caller to allow us to re-enumerate the bus on the host */
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void (*OnHostRescan)(struct hv_device *Device);
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/* Specific to this driver */
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int (*OnIORequest)(struct hv_device *Device,
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struct hv_storvsc_request *Request);
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int (*OnHostReset)(struct hv_device *Device);
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};
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struct storvsc_device_info {
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unsigned int PortNumber;
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unsigned char PathId;
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unsigned char TargetId;
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};
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/* Interface */
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int StorVscInitialize(struct hv_driver *driver);
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int BlkVscInitialize(struct hv_driver *driver);
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#endif /* _STORVSC_API_H_ */
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