ee7afd717c
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
320 lines
8.5 KiB
C
320 lines
8.5 KiB
C
/*
|
|
* FC Transport BSG Interface
|
|
*
|
|
* Copyright (C) 2008 James Smart, Emulex Corporation
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#ifndef SCSI_BSG_FC_H
|
|
#define SCSI_BSG_FC_H
|
|
|
|
/*
|
|
* This file intended to be included by both kernel and user space
|
|
*/
|
|
|
|
/*
|
|
* FC Transport SGIO v4 BSG Message Support
|
|
*/
|
|
|
|
/* Default BSG request timeout (in seconds) */
|
|
#define FC_DEFAULT_BSG_TIMEOUT (10 * HZ)
|
|
|
|
|
|
/*
|
|
* Request Message Codes supported by the FC Transport
|
|
*/
|
|
|
|
/* define the class masks for the message codes */
|
|
#define FC_BSG_CLS_MASK 0xF0000000 /* find object class */
|
|
#define FC_BSG_HST_MASK 0x80000000 /* fc host class */
|
|
#define FC_BSG_RPT_MASK 0x40000000 /* fc rport class */
|
|
|
|
/* fc_host Message Codes */
|
|
#define FC_BSG_HST_ADD_RPORT (FC_BSG_HST_MASK | 0x00000001)
|
|
#define FC_BSG_HST_DEL_RPORT (FC_BSG_HST_MASK | 0x00000002)
|
|
#define FC_BSG_HST_ELS_NOLOGIN (FC_BSG_HST_MASK | 0x00000003)
|
|
#define FC_BSG_HST_CT (FC_BSG_HST_MASK | 0x00000004)
|
|
#define FC_BSG_HST_VENDOR (FC_BSG_HST_MASK | 0x000000FF)
|
|
|
|
/* fc_rport Message Codes */
|
|
#define FC_BSG_RPT_ELS (FC_BSG_RPT_MASK | 0x00000001)
|
|
#define FC_BSG_RPT_CT (FC_BSG_RPT_MASK | 0x00000002)
|
|
|
|
|
|
|
|
/*
|
|
* FC Address Identifiers in Message Structures :
|
|
*
|
|
* Whenever a command payload contains a FC Address Identifier
|
|
* (aka port_id), the value is effectively in big-endian
|
|
* order, thus the array elements are decoded as follows:
|
|
* element [0] is bits 23:16 of the FC Address Identifier
|
|
* element [1] is bits 15:8 of the FC Address Identifier
|
|
* element [2] is bits 7:0 of the FC Address Identifier
|
|
*/
|
|
|
|
|
|
/*
|
|
* FC Host Messages
|
|
*/
|
|
|
|
/* FC_BSG_HST_ADDR_PORT : */
|
|
|
|
/* Request:
|
|
* This message requests the FC host to login to the remote port
|
|
* at the specified N_Port_Id. The remote port is to be enumerated
|
|
* with the transport upon completion of the login.
|
|
*/
|
|
struct fc_bsg_host_add_rport {
|
|
uint8_t reserved;
|
|
|
|
/* FC Address Identier of the remote port to login to */
|
|
uint8_t port_id[3];
|
|
};
|
|
|
|
/* Response:
|
|
* There is no additional response data - fc_bsg_reply->result is sufficient
|
|
*/
|
|
|
|
|
|
/* FC_BSG_HST_DEL_RPORT : */
|
|
|
|
/* Request:
|
|
* This message requests the FC host to remove an enumerated
|
|
* remote port and to terminate the login to it.
|
|
*
|
|
* Note: The driver is free to reject this request if it desires to
|
|
* remain logged in with the remote port.
|
|
*/
|
|
struct fc_bsg_host_del_rport {
|
|
uint8_t reserved;
|
|
|
|
/* FC Address Identier of the remote port to logout of */
|
|
uint8_t port_id[3];
|
|
};
|
|
|
|
/* Response:
|
|
* There is no additional response data - fc_bsg_reply->result is sufficient
|
|
*/
|
|
|
|
|
|
/* FC_BSG_HST_ELS_NOLOGIN : */
|
|
|
|
/* Request:
|
|
* This message requests the FC_Host to send an ELS to a specific
|
|
* N_Port_ID. The host does not need to log into the remote port,
|
|
* nor does it need to enumerate the rport for further traffic
|
|
* (although, the FC host is free to do so if it desires).
|
|
*/
|
|
struct fc_bsg_host_els {
|
|
/*
|
|
* ELS Command Code being sent (must be the same as byte 0
|
|
* of the payload)
|
|
*/
|
|
uint8_t command_code;
|
|
|
|
/* FC Address Identier of the remote port to send the ELS to */
|
|
uint8_t port_id[3];
|
|
};
|
|
|
|
/* Response:
|
|
*/
|
|
/* fc_bsg_ctels_reply->status values */
|
|
#define FC_CTELS_STATUS_OK 0x00000000
|
|
#define FC_CTELS_STATUS_REJECT 0x00000001
|
|
#define FC_CTELS_STATUS_P_RJT 0x00000002
|
|
#define FC_CTELS_STATUS_F_RJT 0x00000003
|
|
#define FC_CTELS_STATUS_P_BSY 0x00000004
|
|
#define FC_CTELS_STATUS_F_BSY 0x00000006
|
|
struct fc_bsg_ctels_reply {
|
|
/*
|
|
* Note: An ELS LS_RJT may be reported in 2 ways:
|
|
* a) A status of FC_CTELS_STATUS_OK is returned. The caller
|
|
* is to look into the ELS receive payload to determine
|
|
* LS_ACC or LS_RJT (by contents of word 0). The reject
|
|
* data will be in word 1.
|
|
* b) A status of FC_CTELS_STATUS_REJECT is returned, The
|
|
* rjt_data field will contain valid data.
|
|
*
|
|
* Note: ELS LS_ACC is determined by an FC_CTELS_STATUS_OK, and
|
|
* the receive payload word 0 indicates LS_ACC
|
|
* (e.g. value is 0x02xxxxxx).
|
|
*
|
|
* Note: Similarly, a CT Reject may be reported in 2 ways:
|
|
* a) A status of FC_CTELS_STATUS_OK is returned. The caller
|
|
* is to look into the CT receive payload to determine
|
|
* Accept or Reject (by contents of word 2). The reject
|
|
* data will be in word 3.
|
|
* b) A status of FC_CTELS_STATUS_REJECT is returned, The
|
|
* rjt_data field will contain valid data.
|
|
*
|
|
* Note: x_RJT/BSY status will indicae that the rjt_data field
|
|
* is valid and contains the reason/explanation values.
|
|
*/
|
|
uint32_t status; /* See FC_CTELS_STATUS_xxx */
|
|
|
|
/* valid if status is not FC_CTELS_STATUS_OK */
|
|
struct {
|
|
uint8_t action; /* fragment_id for CT REJECT */
|
|
uint8_t reason_code;
|
|
uint8_t reason_explanation;
|
|
uint8_t vendor_unique;
|
|
} rjt_data;
|
|
};
|
|
|
|
|
|
/* FC_BSG_HST_CT : */
|
|
|
|
/* Request:
|
|
* This message requests that a CT Request be performed with the
|
|
* indicated N_Port_ID. The driver is responsible for logging in with
|
|
* the fabric and/or N_Port_ID, etc as per FC rules. This request does
|
|
* not mandate that the driver must enumerate the destination in the
|
|
* transport. The driver is allowed to decide whether to enumerate it,
|
|
* and whether to tear it down after the request.
|
|
*/
|
|
struct fc_bsg_host_ct {
|
|
uint8_t reserved;
|
|
|
|
/* FC Address Identier of the remote port to send the ELS to */
|
|
uint8_t port_id[3];
|
|
|
|
/*
|
|
* We need words 0-2 of the generic preamble for the LLD's
|
|
*/
|
|
uint32_t preamble_word0; /* revision & IN_ID */
|
|
uint32_t preamble_word1; /* GS_Type, GS_SubType, Options, Rsvd */
|
|
uint32_t preamble_word2; /* Cmd Code, Max Size */
|
|
|
|
};
|
|
/* Response:
|
|
*
|
|
* The reply structure is an fc_bsg_ctels_reply structure
|
|
*/
|
|
|
|
|
|
/* FC_BSG_HST_VENDOR : */
|
|
|
|
/* Request:
|
|
* Note: When specifying vendor_id, be sure to read the Vendor Type and ID
|
|
* formatting requirements specified in scsi_netlink.h
|
|
*/
|
|
struct fc_bsg_host_vendor {
|
|
/*
|
|
* Identifies the vendor that the message is formatted for. This
|
|
* should be the recipient of the message.
|
|
*/
|
|
uint64_t vendor_id;
|
|
|
|
/* start of vendor command area */
|
|
uint32_t vendor_cmd[0];
|
|
};
|
|
|
|
/* Response:
|
|
*/
|
|
struct fc_bsg_host_vendor_reply {
|
|
/* start of vendor response area */
|
|
uint32_t vendor_rsp[0];
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
* FC Remote Port Messages
|
|
*/
|
|
|
|
/* FC_BSG_RPT_ELS : */
|
|
|
|
/* Request:
|
|
* This message requests that an ELS be performed with the rport.
|
|
*/
|
|
struct fc_bsg_rport_els {
|
|
/*
|
|
* ELS Command Code being sent (must be the same as
|
|
* byte 0 of the payload)
|
|
*/
|
|
uint8_t els_code;
|
|
};
|
|
|
|
/* Response:
|
|
*
|
|
* The reply structure is an fc_bsg_ctels_reply structure
|
|
*/
|
|
|
|
|
|
/* FC_BSG_RPT_CT : */
|
|
|
|
/* Request:
|
|
* This message requests that a CT Request be performed with the rport.
|
|
*/
|
|
struct fc_bsg_rport_ct {
|
|
/*
|
|
* We need words 0-2 of the generic preamble for the LLD's
|
|
*/
|
|
uint32_t preamble_word0; /* revision & IN_ID */
|
|
uint32_t preamble_word1; /* GS_Type, GS_SubType, Options, Rsvd */
|
|
uint32_t preamble_word2; /* Cmd Code, Max Size */
|
|
};
|
|
/* Response:
|
|
*
|
|
* The reply structure is an fc_bsg_ctels_reply structure
|
|
*/
|
|
|
|
|
|
|
|
|
|
/* request (CDB) structure of the sg_io_v4 */
|
|
struct fc_bsg_request {
|
|
uint32_t msgcode;
|
|
union {
|
|
struct fc_bsg_host_add_rport h_addrport;
|
|
struct fc_bsg_host_del_rport h_delrport;
|
|
struct fc_bsg_host_els h_els;
|
|
struct fc_bsg_host_ct h_ct;
|
|
struct fc_bsg_host_vendor h_vendor;
|
|
|
|
struct fc_bsg_rport_els r_els;
|
|
struct fc_bsg_rport_ct r_ct;
|
|
} rqst_data;
|
|
} __attribute__((packed));
|
|
|
|
|
|
/* response (request sense data) structure of the sg_io_v4 */
|
|
struct fc_bsg_reply {
|
|
/*
|
|
* The completion result. Result exists in two forms:
|
|
* if negative, it is an -Exxx system errno value. There will
|
|
* be no further reply information supplied.
|
|
* else, it's the 4-byte scsi error result, with driver, host,
|
|
* msg and status fields. The per-msgcode reply structure
|
|
* will contain valid data.
|
|
*/
|
|
uint32_t result;
|
|
|
|
/* If there was reply_payload, how much was recevied ? */
|
|
uint32_t reply_payload_rcv_len;
|
|
|
|
union {
|
|
struct fc_bsg_host_vendor_reply vendor_reply;
|
|
|
|
struct fc_bsg_ctels_reply ctels_reply;
|
|
} reply_data;
|
|
};
|
|
|
|
|
|
#endif /* SCSI_BSG_FC_H */
|
|
|