a8f6ac0573
Move FreeBSD from interface version 0x00030204 to 0x00030208. Updates are required to our grant table implementation before we can bump this further. sys/xen/hvm.h: Replace the implementation of hvm_get_parameter(), formerly located in sys/xen/interface/hvm/params.h. Linux has a similar file which primarily stores this function. sys/xen/xenstore/xenstore.c: Include new xen/hvm.h header file to get hvm_get_parameter(). sys/amd64/include/xen/xen-os.h: sys/i386/include/xen/xen-os.h: Correctly protect function definition and variables from being included into assembly files in xen-os.h Xen memory barriers are now prefixed with "xen_" to avoid conflicts with OS native primatives. Define Xen memory barriers in terms of the native FreeBSD primatives. Sponsored by: Spectra Logic Corporation Reviewed by: Roger Pau Monné Tested by: Roger Pau Monné Obtained from: Roger Pau Monné (bug fixes)
106 lines
3.5 KiB
C
106 lines
3.5 KiB
C
/******************************************************************************
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* vscsiif.h
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*
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* Based on the blkif.h code.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Copyright(c) FUJITSU Limited 2008.
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*/
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#ifndef __XEN__PUBLIC_IO_SCSI_H__
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#define __XEN__PUBLIC_IO_SCSI_H__
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#include "ring.h"
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#include "../grant_table.h"
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/* command between backend and frontend */
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#define VSCSIIF_ACT_SCSI_CDB 1 /* SCSI CDB command */
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#define VSCSIIF_ACT_SCSI_ABORT 2 /* SCSI Device(Lun) Abort*/
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#define VSCSIIF_ACT_SCSI_RESET 3 /* SCSI Device(Lun) Reset*/
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#define VSCSIIF_BACK_MAX_PENDING_REQS 128
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/*
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* Maximum scatter/gather segments per request.
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*
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* Considering balance between allocating al least 16 "vscsiif_request"
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* structures on one page (4096bytes) and number of scatter gather
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* needed, we decided to use 26 as a magic number.
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*/
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#define VSCSIIF_SG_TABLESIZE 26
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/*
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* base on linux kernel 2.6.18
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*/
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#define VSCSIIF_MAX_COMMAND_SIZE 16
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#define VSCSIIF_SENSE_BUFFERSIZE 96
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struct vscsiif_request {
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uint16_t rqid; /* private guest value, echoed in resp */
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uint8_t act; /* command between backend and frontend */
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uint8_t cmd_len;
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uint8_t cmnd[VSCSIIF_MAX_COMMAND_SIZE];
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uint16_t timeout_per_command; /* The command is issued by twice
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the value in Backend. */
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uint16_t channel, id, lun;
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uint16_t padding;
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uint8_t sc_data_direction; /* for DMA_TO_DEVICE(1)
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DMA_FROM_DEVICE(2)
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DMA_NONE(3) requests */
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uint8_t nr_segments; /* Number of pieces of scatter-gather */
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struct scsiif_request_segment {
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grant_ref_t gref;
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uint16_t offset;
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uint16_t length;
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} seg[VSCSIIF_SG_TABLESIZE];
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uint32_t reserved[3];
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};
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typedef struct vscsiif_request vscsiif_request_t;
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struct vscsiif_response {
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uint16_t rqid;
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uint8_t padding;
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uint8_t sense_len;
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uint8_t sense_buffer[VSCSIIF_SENSE_BUFFERSIZE];
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int32_t rslt;
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uint32_t residual_len; /* request bufflen -
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return the value from physical device */
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uint32_t reserved[36];
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};
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typedef struct vscsiif_response vscsiif_response_t;
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DEFINE_RING_TYPES(vscsiif, struct vscsiif_request, struct vscsiif_response);
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#endif /*__XEN__PUBLIC_IO_SCSI_H__*/
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/*
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* Local variables:
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* mode: C
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* c-set-style: "BSD"
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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