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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * iSCSI Transport BSG Interface4 *5 * Copyright (C) 2009 James Smart, Emulex Corporation6 */7 8#ifndef SCSI_BSG_ISCSI_H9#define SCSI_BSG_ISCSI_H10 11/*12 * This file intended to be included by both kernel and user space13 */14 15#include <scsi/scsi.h>16 17/*18 * iSCSI Transport SGIO v4 BSG Message Support19 */20 21/* Default BSG request timeout (in seconds) */22#define ISCSI_DEFAULT_BSG_TIMEOUT (10 * HZ)23 24 25/*26 * Request Message Codes supported by the iSCSI Transport27 */28 29/* define the class masks for the message codes */30#define ISCSI_BSG_CLS_MASK 0xF0000000 /* find object class */31#define ISCSI_BSG_HST_MASK 0x80000000 /* iscsi host class */32 33/* iscsi host Message Codes */34#define ISCSI_BSG_HST_VENDOR (ISCSI_BSG_HST_MASK | 0x000000FF)35 36 37/*38 * iSCSI Host Messages39 */40 41/* ISCSI_BSG_HST_VENDOR : */42 43/* Request:44 * Note: When specifying vendor_id, be sure to read the Vendor Type and ID45 * formatting requirements specified in scsi_netlink.h46 */47struct iscsi_bsg_host_vendor {48 /*49 * Identifies the vendor that the message is formatted for. This50 * should be the recipient of the message.51 */52 uint64_t vendor_id;53 54 /* start of vendor command area */55 uint32_t vendor_cmd[];56};57 58/* Response:59 */60struct iscsi_bsg_host_vendor_reply {61 /* start of vendor response area */62 uint32_t vendor_rsp[0];63};64 65 66/* request (CDB) structure of the sg_io_v4 */67struct iscsi_bsg_request {68 uint32_t msgcode;69 union {70 struct iscsi_bsg_host_vendor h_vendor;71 } rqst_data;72} __attribute__((packed));73 74 75/* response (request sense data) structure of the sg_io_v4 */76struct iscsi_bsg_reply {77 /*78 * The completion result. Result exists in two forms:79 * if negative, it is an -Exxx system errno value. There will80 * be no further reply information supplied.81 * else, it's the 4-byte scsi error result, with driver, host,82 * msg and status fields. The per-msgcode reply structure83 * will contain valid data.84 */85 uint32_t result;86 87 /* If there was reply_payload, how much was received ? */88 uint32_t reply_payload_rcv_len;89 90 union {91 struct iscsi_bsg_host_vendor_reply vendor_reply;92 } reply_data;93};94 95 96#endif /* SCSI_BSG_ISCSI_H */97