/* * SCSI target kernel/user interface * * Copyright (C) 2005 FUJITA Tomonori <tomof@acm.org> * Copyright (C) 2005 Mike Christie <michaelc@cs.wisc.edu> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that 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., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA */ #ifndef __SCSI_TARGET_IF_H #define __SCSI_TARGET_IF_H /* user -> kernel */ #define TGT_UEVENT_CMD_RSP 0x0001 #define TGT_UEVENT_TSK_MGMT_RSP 0x0002 /* kernel -> user */ #define TGT_KEVENT_CMD_REQ 0x1001 #define TGT_KEVENT_CMD_DONE 0x1002 #define TGT_KEVENT_TSK_MGMT_REQ 0x1003 struct tgt_event_hdr { uint16_t version; uint16_t status; uint16_t type; uint16_t len; } __attribute__ ((aligned (sizeof(uint64_t)))); struct tgt_event { struct tgt_event_hdr hdr; union { /* user-> kernel */ struct { int host_no; uint32_t len; int result; aligned_u64 uaddr; uint8_t rw; aligned_u64 tag; } cmd_rsp; struct { int host_no; aligned_u64 mid; int result; } tsk_mgmt_rsp; /* kernel -> user */ struct { int host_no; uint32_t data_len; uint8_t scb[16]; uint8_t lun[8]; int attribute; aligned_u64 tag; } cmd_req; struct { int host_no; aligned_u64 tag; int result; } cmd_done; struct { int host_no; int function; aligned_u64 tag; uint8_t lun[8]; aligned_u64 mid; } tsk_mgmt_req; } p; } __attribute__ ((aligned (sizeof(uint64_t)))); #define TGT_RING_SIZE (1UL << 16) #define TGT_RING_PAGES (TGT_RING_SIZE >> PAGE_SHIFT) #define TGT_EVENT_PER_PAGE (PAGE_SIZE / sizeof(struct tgt_event)) #define TGT_MAX_EVENTS (TGT_EVENT_PER_PAGE * TGT_RING_PAGES) #endif