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scsi_bsg_fc.h
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ /* * 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 */
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