summaryrefslogtreecommitdiffstats
path: root/include/scsi/scsi_tgt_if.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/scsi/scsi_tgt_if.h')
-rw-r--r--include/scsi/scsi_tgt_if.h90
1 files changed, 90 insertions, 0 deletions
diff --git a/include/scsi/scsi_tgt_if.h b/include/scsi/scsi_tgt_if.h
new file mode 100644
index 000000000000..46d5e70d7215
--- /dev/null
+++ b/include/scsi/scsi_tgt_if.h
@@ -0,0 +1,90 @@
+/*
+ * 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