13703b2c5SNicholas Bellinger /******************************************************************************* 23703b2c5SNicholas Bellinger * 33703b2c5SNicholas Bellinger * This file contains the Linux/SCSI LLD virtual SCSI initiator driver 43703b2c5SNicholas Bellinger * for emulated SAS initiator ports 53703b2c5SNicholas Bellinger * 63703b2c5SNicholas Bellinger * © Copyright 2011 RisingTide Systems LLC. 73703b2c5SNicholas Bellinger * 83703b2c5SNicholas Bellinger * Licensed to the Linux Foundation under the General Public License (GPL) version 2. 93703b2c5SNicholas Bellinger * 103703b2c5SNicholas Bellinger * Author: Nicholas A. Bellinger <nab@risingtidesystems.com> 113703b2c5SNicholas Bellinger * 123703b2c5SNicholas Bellinger * This program is free software; you can redistribute it and/or modify 133703b2c5SNicholas Bellinger * it under the terms of the GNU General Public License as published by 143703b2c5SNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 153703b2c5SNicholas Bellinger * (at your option) any later version. 163703b2c5SNicholas Bellinger * 173703b2c5SNicholas Bellinger * This program is distributed in the hope that it will be useful, 183703b2c5SNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 193703b2c5SNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 203703b2c5SNicholas Bellinger * GNU General Public License for more details. 213703b2c5SNicholas Bellinger ****************************************************************************/ 223703b2c5SNicholas Bellinger 233703b2c5SNicholas Bellinger #include <linux/module.h> 243703b2c5SNicholas Bellinger #include <linux/moduleparam.h> 253703b2c5SNicholas Bellinger #include <linux/init.h> 263703b2c5SNicholas Bellinger #include <linux/slab.h> 273703b2c5SNicholas Bellinger #include <linux/types.h> 283703b2c5SNicholas Bellinger #include <linux/configfs.h> 293703b2c5SNicholas Bellinger #include <scsi/scsi.h> 303703b2c5SNicholas Bellinger #include <scsi/scsi_tcq.h> 313703b2c5SNicholas Bellinger #include <scsi/scsi_host.h> 323703b2c5SNicholas Bellinger #include <scsi/scsi_device.h> 333703b2c5SNicholas Bellinger #include <scsi/scsi_cmnd.h> 343703b2c5SNicholas Bellinger 353703b2c5SNicholas Bellinger #include <target/target_core_base.h> 363703b2c5SNicholas Bellinger #include <target/target_core_transport.h> 373703b2c5SNicholas Bellinger #include <target/target_core_fabric_ops.h> 383703b2c5SNicholas Bellinger #include <target/target_core_fabric_configfs.h> 393703b2c5SNicholas Bellinger #include <target/target_core_fabric_lib.h> 403703b2c5SNicholas Bellinger #include <target/target_core_configfs.h> 413703b2c5SNicholas Bellinger #include <target/target_core_device.h> 423703b2c5SNicholas Bellinger #include <target/target_core_tpg.h> 433703b2c5SNicholas Bellinger #include <target/target_core_tmr.h> 443703b2c5SNicholas Bellinger 453703b2c5SNicholas Bellinger #include "tcm_loop.h" 463703b2c5SNicholas Bellinger 473703b2c5SNicholas Bellinger #define to_tcm_loop_hba(hba) container_of(hba, struct tcm_loop_hba, dev) 483703b2c5SNicholas Bellinger 493703b2c5SNicholas Bellinger /* Local pointer to allocated TCM configfs fabric module */ 503703b2c5SNicholas Bellinger static struct target_fabric_configfs *tcm_loop_fabric_configfs; 513703b2c5SNicholas Bellinger 523703b2c5SNicholas Bellinger static struct kmem_cache *tcm_loop_cmd_cache; 533703b2c5SNicholas Bellinger 543703b2c5SNicholas Bellinger static int tcm_loop_hba_no_cnt; 553703b2c5SNicholas Bellinger 563703b2c5SNicholas Bellinger /* 573703b2c5SNicholas Bellinger * Allocate a tcm_loop cmd descriptor from target_core_mod code 583703b2c5SNicholas Bellinger * 593703b2c5SNicholas Bellinger * Can be called from interrupt context in tcm_loop_queuecommand() below 603703b2c5SNicholas Bellinger */ 613703b2c5SNicholas Bellinger static struct se_cmd *tcm_loop_allocate_core_cmd( 623703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba, 633703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 643703b2c5SNicholas Bellinger struct scsi_cmnd *sc) 653703b2c5SNicholas Bellinger { 663703b2c5SNicholas Bellinger struct se_cmd *se_cmd; 673703b2c5SNicholas Bellinger struct se_session *se_sess; 683703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus = tl_hba->tl_nexus; 693703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd; 703703b2c5SNicholas Bellinger int sam_task_attr; 713703b2c5SNicholas Bellinger 723703b2c5SNicholas Bellinger if (!tl_nexus) { 733703b2c5SNicholas Bellinger scmd_printk(KERN_ERR, sc, "TCM_Loop I_T Nexus" 743703b2c5SNicholas Bellinger " does not exist\n"); 753703b2c5SNicholas Bellinger set_host_byte(sc, DID_ERROR); 763703b2c5SNicholas Bellinger return NULL; 773703b2c5SNicholas Bellinger } 783703b2c5SNicholas Bellinger se_sess = tl_nexus->se_sess; 793703b2c5SNicholas Bellinger 803703b2c5SNicholas Bellinger tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_ATOMIC); 813703b2c5SNicholas Bellinger if (!tl_cmd) { 826708bb27SAndy Grover pr_err("Unable to allocate struct tcm_loop_cmd\n"); 833703b2c5SNicholas Bellinger set_host_byte(sc, DID_ERROR); 843703b2c5SNicholas Bellinger return NULL; 853703b2c5SNicholas Bellinger } 863703b2c5SNicholas Bellinger se_cmd = &tl_cmd->tl_se_cmd; 873703b2c5SNicholas Bellinger /* 883703b2c5SNicholas Bellinger * Save the pointer to struct scsi_cmnd *sc 893703b2c5SNicholas Bellinger */ 903703b2c5SNicholas Bellinger tl_cmd->sc = sc; 913703b2c5SNicholas Bellinger /* 923703b2c5SNicholas Bellinger * Locate the SAM Task Attr from struct scsi_cmnd * 933703b2c5SNicholas Bellinger */ 943703b2c5SNicholas Bellinger if (sc->device->tagged_supported) { 953703b2c5SNicholas Bellinger switch (sc->tag) { 963703b2c5SNicholas Bellinger case HEAD_OF_QUEUE_TAG: 9761db1802SNicholas Bellinger sam_task_attr = MSG_HEAD_TAG; 983703b2c5SNicholas Bellinger break; 993703b2c5SNicholas Bellinger case ORDERED_QUEUE_TAG: 10061db1802SNicholas Bellinger sam_task_attr = MSG_ORDERED_TAG; 1013703b2c5SNicholas Bellinger break; 1023703b2c5SNicholas Bellinger default: 10361db1802SNicholas Bellinger sam_task_attr = MSG_SIMPLE_TAG; 1043703b2c5SNicholas Bellinger break; 1053703b2c5SNicholas Bellinger } 1063703b2c5SNicholas Bellinger } else 10761db1802SNicholas Bellinger sam_task_attr = MSG_SIMPLE_TAG; 1083703b2c5SNicholas Bellinger 1093703b2c5SNicholas Bellinger /* 1103703b2c5SNicholas Bellinger * Initialize struct se_cmd descriptor from target_core_mod infrastructure 1113703b2c5SNicholas Bellinger */ 1123703b2c5SNicholas Bellinger transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 1133703b2c5SNicholas Bellinger scsi_bufflen(sc), sc->sc_data_direction, sam_task_attr, 1143703b2c5SNicholas Bellinger &tl_cmd->tl_sense_buf[0]); 1153703b2c5SNicholas Bellinger 1163703b2c5SNicholas Bellinger /* 1173703b2c5SNicholas Bellinger * Signal BIDI usage with T_TASK(cmd)->t_tasks_bidi 1183703b2c5SNicholas Bellinger */ 1193703b2c5SNicholas Bellinger if (scsi_bidi_cmnd(sc)) 120a1d8b49aSAndy Grover se_cmd->t_tasks_bidi = 1; 1213703b2c5SNicholas Bellinger /* 1223703b2c5SNicholas Bellinger * Locate the struct se_lun pointer and attach it to struct se_cmd 1233703b2c5SNicholas Bellinger */ 1245951146dSAndy Grover if (transport_lookup_cmd_lun(se_cmd, tl_cmd->sc->device->lun) < 0) { 1253703b2c5SNicholas Bellinger kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); 1263703b2c5SNicholas Bellinger set_host_byte(sc, DID_NO_CONNECT); 1273703b2c5SNicholas Bellinger return NULL; 1283703b2c5SNicholas Bellinger } 1293703b2c5SNicholas Bellinger 1303703b2c5SNicholas Bellinger return se_cmd; 1313703b2c5SNicholas Bellinger } 1323703b2c5SNicholas Bellinger 1333703b2c5SNicholas Bellinger /* 1343703b2c5SNicholas Bellinger * Called by struct target_core_fabric_ops->new_cmd_map() 1353703b2c5SNicholas Bellinger * 1363703b2c5SNicholas Bellinger * Always called in process context. A non zero return value 1373703b2c5SNicholas Bellinger * here will signal to handle an exception based on the return code. 1383703b2c5SNicholas Bellinger */ 1393703b2c5SNicholas Bellinger static int tcm_loop_new_cmd_map(struct se_cmd *se_cmd) 1403703b2c5SNicholas Bellinger { 1413703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 1423703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 1433703b2c5SNicholas Bellinger struct scsi_cmnd *sc = tl_cmd->sc; 1445951146dSAndy Grover struct scatterlist *sgl_bidi = NULL; 1455951146dSAndy Grover u32 sgl_bidi_count = 0; 1463703b2c5SNicholas Bellinger int ret; 1473703b2c5SNicholas Bellinger /* 1483703b2c5SNicholas Bellinger * Allocate the necessary tasks to complete the received CDB+data 1493703b2c5SNicholas Bellinger */ 1505951146dSAndy Grover ret = transport_generic_allocate_tasks(se_cmd, sc->cmnd); 1515951146dSAndy Grover if (ret == -ENOMEM) { 1523703b2c5SNicholas Bellinger /* Out of Resources */ 1533703b2c5SNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 1545951146dSAndy Grover } else if (ret == -EINVAL) { 1553703b2c5SNicholas Bellinger /* 1563703b2c5SNicholas Bellinger * Handle case for SAM_STAT_RESERVATION_CONFLICT 1573703b2c5SNicholas Bellinger */ 1583703b2c5SNicholas Bellinger if (se_cmd->se_cmd_flags & SCF_SCSI_RESERVATION_CONFLICT) 1593703b2c5SNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 1603703b2c5SNicholas Bellinger /* 1613703b2c5SNicholas Bellinger * Otherwise, return SAM_STAT_CHECK_CONDITION and return 1623703b2c5SNicholas Bellinger * sense data. 1633703b2c5SNicholas Bellinger */ 1643703b2c5SNicholas Bellinger return PYX_TRANSPORT_USE_SENSE_REASON; 1653703b2c5SNicholas Bellinger } 1665951146dSAndy Grover 1673703b2c5SNicholas Bellinger /* 1683703b2c5SNicholas Bellinger * For BIDI commands, pass in the extra READ buffer 1693703b2c5SNicholas Bellinger * to transport_generic_map_mem_to_cmd() below.. 1703703b2c5SNicholas Bellinger */ 171a1d8b49aSAndy Grover if (se_cmd->t_tasks_bidi) { 1723703b2c5SNicholas Bellinger struct scsi_data_buffer *sdb = scsi_in(sc); 1733703b2c5SNicholas Bellinger 1745951146dSAndy Grover sgl_bidi = sdb->table.sgl; 1755951146dSAndy Grover sgl_bidi_count = sdb->table.nents; 1763703b2c5SNicholas Bellinger } 1775951146dSAndy Grover 178ec98f782SAndy Grover /* Tell the core about our preallocated memory */ 1795951146dSAndy Grover ret = transport_generic_map_mem_to_cmd(se_cmd, scsi_sglist(sc), 1805951146dSAndy Grover scsi_sg_count(sc), sgl_bidi, sgl_bidi_count); 1813703b2c5SNicholas Bellinger if (ret < 0) 1823703b2c5SNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 1833703b2c5SNicholas Bellinger 1843703b2c5SNicholas Bellinger return 0; 1853703b2c5SNicholas Bellinger } 1863703b2c5SNicholas Bellinger 1873703b2c5SNicholas Bellinger /* 1883703b2c5SNicholas Bellinger * Called from struct target_core_fabric_ops->check_stop_free() 1893703b2c5SNicholas Bellinger */ 1903703b2c5SNicholas Bellinger static void tcm_loop_check_stop_free(struct se_cmd *se_cmd) 1913703b2c5SNicholas Bellinger { 1923703b2c5SNicholas Bellinger /* 1933703b2c5SNicholas Bellinger * Do not release struct se_cmd's containing a valid TMR 1943703b2c5SNicholas Bellinger * pointer. These will be released directly in tcm_loop_device_reset() 1953703b2c5SNicholas Bellinger * with transport_generic_free_cmd(). 1963703b2c5SNicholas Bellinger */ 1973703b2c5SNicholas Bellinger if (se_cmd->se_tmr_req) 1983703b2c5SNicholas Bellinger return; 1993703b2c5SNicholas Bellinger /* 2003703b2c5SNicholas Bellinger * Release the struct se_cmd, which will make a callback to release 2013703b2c5SNicholas Bellinger * struct tcm_loop_cmd * in tcm_loop_deallocate_core_cmd() 2023703b2c5SNicholas Bellinger */ 20382f1c8a4SChristoph Hellwig transport_generic_free_cmd(se_cmd, 0); 2043703b2c5SNicholas Bellinger } 2053703b2c5SNicholas Bellinger 20635462975SChristoph Hellwig static void tcm_loop_release_cmd(struct se_cmd *se_cmd) 2073703b2c5SNicholas Bellinger { 2083703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 2093703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 2103703b2c5SNicholas Bellinger 2113703b2c5SNicholas Bellinger kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); 2123703b2c5SNicholas Bellinger } 2133703b2c5SNicholas Bellinger 2143703b2c5SNicholas Bellinger static int tcm_loop_proc_info(struct Scsi_Host *host, char *buffer, 2153703b2c5SNicholas Bellinger char **start, off_t offset, 2163703b2c5SNicholas Bellinger int length, int inout) 2173703b2c5SNicholas Bellinger { 2183703b2c5SNicholas Bellinger return sprintf(buffer, "tcm_loop_proc_info()\n"); 2193703b2c5SNicholas Bellinger } 2203703b2c5SNicholas Bellinger 2213703b2c5SNicholas Bellinger static int tcm_loop_driver_probe(struct device *); 2223703b2c5SNicholas Bellinger static int tcm_loop_driver_remove(struct device *); 2233703b2c5SNicholas Bellinger 2243703b2c5SNicholas Bellinger static int pseudo_lld_bus_match(struct device *dev, 2253703b2c5SNicholas Bellinger struct device_driver *dev_driver) 2263703b2c5SNicholas Bellinger { 2273703b2c5SNicholas Bellinger return 1; 2283703b2c5SNicholas Bellinger } 2293703b2c5SNicholas Bellinger 2303703b2c5SNicholas Bellinger static struct bus_type tcm_loop_lld_bus = { 2313703b2c5SNicholas Bellinger .name = "tcm_loop_bus", 2323703b2c5SNicholas Bellinger .match = pseudo_lld_bus_match, 2333703b2c5SNicholas Bellinger .probe = tcm_loop_driver_probe, 2343703b2c5SNicholas Bellinger .remove = tcm_loop_driver_remove, 2353703b2c5SNicholas Bellinger }; 2363703b2c5SNicholas Bellinger 2373703b2c5SNicholas Bellinger static struct device_driver tcm_loop_driverfs = { 2383703b2c5SNicholas Bellinger .name = "tcm_loop", 2393703b2c5SNicholas Bellinger .bus = &tcm_loop_lld_bus, 2403703b2c5SNicholas Bellinger }; 2413703b2c5SNicholas Bellinger /* 2423703b2c5SNicholas Bellinger * Used with root_device_register() in tcm_loop_alloc_core_bus() below 2433703b2c5SNicholas Bellinger */ 2443703b2c5SNicholas Bellinger struct device *tcm_loop_primary; 2453703b2c5SNicholas Bellinger 2463703b2c5SNicholas Bellinger /* 2473703b2c5SNicholas Bellinger * Copied from drivers/scsi/libfc/fc_fcp.c:fc_change_queue_depth() and 2483703b2c5SNicholas Bellinger * drivers/scsi/libiscsi.c:iscsi_change_queue_depth() 2493703b2c5SNicholas Bellinger */ 2503703b2c5SNicholas Bellinger static int tcm_loop_change_queue_depth( 2513703b2c5SNicholas Bellinger struct scsi_device *sdev, 2523703b2c5SNicholas Bellinger int depth, 2533703b2c5SNicholas Bellinger int reason) 2543703b2c5SNicholas Bellinger { 2553703b2c5SNicholas Bellinger switch (reason) { 2563703b2c5SNicholas Bellinger case SCSI_QDEPTH_DEFAULT: 2573703b2c5SNicholas Bellinger scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); 2583703b2c5SNicholas Bellinger break; 2593703b2c5SNicholas Bellinger case SCSI_QDEPTH_QFULL: 2603703b2c5SNicholas Bellinger scsi_track_queue_full(sdev, depth); 2613703b2c5SNicholas Bellinger break; 2623703b2c5SNicholas Bellinger case SCSI_QDEPTH_RAMP_UP: 2633703b2c5SNicholas Bellinger scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); 2643703b2c5SNicholas Bellinger break; 2653703b2c5SNicholas Bellinger default: 2663703b2c5SNicholas Bellinger return -EOPNOTSUPP; 2673703b2c5SNicholas Bellinger } 2683703b2c5SNicholas Bellinger return sdev->queue_depth; 2693703b2c5SNicholas Bellinger } 2703703b2c5SNicholas Bellinger 2713703b2c5SNicholas Bellinger /* 2723703b2c5SNicholas Bellinger * Main entry point from struct scsi_host_template for incoming SCSI CDB+Data 2733703b2c5SNicholas Bellinger * from Linux/SCSI subsystem for SCSI low level device drivers (LLDs) 2743703b2c5SNicholas Bellinger */ 2753703b2c5SNicholas Bellinger static int tcm_loop_queuecommand( 2763703b2c5SNicholas Bellinger struct Scsi_Host *sh, 2773703b2c5SNicholas Bellinger struct scsi_cmnd *sc) 2783703b2c5SNicholas Bellinger { 2793703b2c5SNicholas Bellinger struct se_cmd *se_cmd; 2803703b2c5SNicholas Bellinger struct se_portal_group *se_tpg; 2813703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 2823703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 2833703b2c5SNicholas Bellinger 2846708bb27SAndy Grover pr_debug("tcm_loop_queuecommand() %d:%d:%d:%d got CDB: 0x%02x" 2853703b2c5SNicholas Bellinger " scsi_buf_len: %u\n", sc->device->host->host_no, 2863703b2c5SNicholas Bellinger sc->device->id, sc->device->channel, sc->device->lun, 2873703b2c5SNicholas Bellinger sc->cmnd[0], scsi_bufflen(sc)); 2883703b2c5SNicholas Bellinger /* 2893703b2c5SNicholas Bellinger * Locate the tcm_loop_hba_t pointer 2903703b2c5SNicholas Bellinger */ 2913703b2c5SNicholas Bellinger tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); 2923703b2c5SNicholas Bellinger tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; 2930a020436SNicholas Bellinger /* 2940a020436SNicholas Bellinger * Ensure that this tl_tpg reference from the incoming sc->device->id 2950a020436SNicholas Bellinger * has already been configured via tcm_loop_make_naa_tpg(). 2960a020436SNicholas Bellinger */ 2970a020436SNicholas Bellinger if (!tl_tpg->tl_hba) { 2980a020436SNicholas Bellinger set_host_byte(sc, DID_NO_CONNECT); 2990a020436SNicholas Bellinger sc->scsi_done(sc); 3000a020436SNicholas Bellinger return 0; 3010a020436SNicholas Bellinger } 3023703b2c5SNicholas Bellinger se_tpg = &tl_tpg->tl_se_tpg; 3033703b2c5SNicholas Bellinger /* 3043703b2c5SNicholas Bellinger * Determine the SAM Task Attribute and allocate tl_cmd and 3053703b2c5SNicholas Bellinger * tl_cmd->tl_se_cmd from TCM infrastructure 3063703b2c5SNicholas Bellinger */ 3073703b2c5SNicholas Bellinger se_cmd = tcm_loop_allocate_core_cmd(tl_hba, se_tpg, sc); 3083703b2c5SNicholas Bellinger if (!se_cmd) { 3093703b2c5SNicholas Bellinger sc->scsi_done(sc); 3103703b2c5SNicholas Bellinger return 0; 3113703b2c5SNicholas Bellinger } 3123703b2c5SNicholas Bellinger /* 3133703b2c5SNicholas Bellinger * Queue up the newly allocated to be processed in TCM thread context. 3143703b2c5SNicholas Bellinger */ 3153703b2c5SNicholas Bellinger transport_generic_handle_cdb_map(se_cmd); 3163703b2c5SNicholas Bellinger return 0; 3173703b2c5SNicholas Bellinger } 3183703b2c5SNicholas Bellinger 3193703b2c5SNicholas Bellinger /* 3203703b2c5SNicholas Bellinger * Called from SCSI EH process context to issue a LUN_RESET TMR 3213703b2c5SNicholas Bellinger * to struct scsi_device 3223703b2c5SNicholas Bellinger */ 3233703b2c5SNicholas Bellinger static int tcm_loop_device_reset(struct scsi_cmnd *sc) 3243703b2c5SNicholas Bellinger { 3253703b2c5SNicholas Bellinger struct se_cmd *se_cmd = NULL; 3263703b2c5SNicholas Bellinger struct se_portal_group *se_tpg; 3273703b2c5SNicholas Bellinger struct se_session *se_sess; 3283703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = NULL; 3293703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 3303703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus; 3313703b2c5SNicholas Bellinger struct tcm_loop_tmr *tl_tmr = NULL; 3323703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 3333703b2c5SNicholas Bellinger int ret = FAILED; 3343703b2c5SNicholas Bellinger /* 3353703b2c5SNicholas Bellinger * Locate the tcm_loop_hba_t pointer 3363703b2c5SNicholas Bellinger */ 3373703b2c5SNicholas Bellinger tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); 3383703b2c5SNicholas Bellinger /* 3393703b2c5SNicholas Bellinger * Locate the tl_nexus and se_sess pointers 3403703b2c5SNicholas Bellinger */ 3413703b2c5SNicholas Bellinger tl_nexus = tl_hba->tl_nexus; 3423703b2c5SNicholas Bellinger if (!tl_nexus) { 3436708bb27SAndy Grover pr_err("Unable to perform device reset without" 3443703b2c5SNicholas Bellinger " active I_T Nexus\n"); 3453703b2c5SNicholas Bellinger return FAILED; 3463703b2c5SNicholas Bellinger } 3473703b2c5SNicholas Bellinger se_sess = tl_nexus->se_sess; 3483703b2c5SNicholas Bellinger /* 3493703b2c5SNicholas Bellinger * Locate the tl_tpg and se_tpg pointers from TargetID in sc->device->id 3503703b2c5SNicholas Bellinger */ 3513703b2c5SNicholas Bellinger tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; 3523703b2c5SNicholas Bellinger se_tpg = &tl_tpg->tl_se_tpg; 3533703b2c5SNicholas Bellinger 3543703b2c5SNicholas Bellinger tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_KERNEL); 3553703b2c5SNicholas Bellinger if (!tl_cmd) { 3566708bb27SAndy Grover pr_err("Unable to allocate memory for tl_cmd\n"); 3573703b2c5SNicholas Bellinger return FAILED; 3583703b2c5SNicholas Bellinger } 3593703b2c5SNicholas Bellinger 3603703b2c5SNicholas Bellinger tl_tmr = kzalloc(sizeof(struct tcm_loop_tmr), GFP_KERNEL); 3613703b2c5SNicholas Bellinger if (!tl_tmr) { 3626708bb27SAndy Grover pr_err("Unable to allocate memory for tl_tmr\n"); 3633703b2c5SNicholas Bellinger goto release; 3643703b2c5SNicholas Bellinger } 3653703b2c5SNicholas Bellinger init_waitqueue_head(&tl_tmr->tl_tmr_wait); 3663703b2c5SNicholas Bellinger 3673703b2c5SNicholas Bellinger se_cmd = &tl_cmd->tl_se_cmd; 3683703b2c5SNicholas Bellinger /* 3693703b2c5SNicholas Bellinger * Initialize struct se_cmd descriptor from target_core_mod infrastructure 3703703b2c5SNicholas Bellinger */ 3713703b2c5SNicholas Bellinger transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 0, 37261db1802SNicholas Bellinger DMA_NONE, MSG_SIMPLE_TAG, 3733703b2c5SNicholas Bellinger &tl_cmd->tl_sense_buf[0]); 3743703b2c5SNicholas Bellinger /* 3753703b2c5SNicholas Bellinger * Allocate the LUN_RESET TMR 3763703b2c5SNicholas Bellinger */ 3775951146dSAndy Grover se_cmd->se_tmr_req = core_tmr_alloc_req(se_cmd, tl_tmr, 378dd503a5fSRoland Dreier TMR_LUN_RESET, GFP_KERNEL); 379552523dcSDan Carpenter if (IS_ERR(se_cmd->se_tmr_req)) 3803703b2c5SNicholas Bellinger goto release; 3813703b2c5SNicholas Bellinger /* 3823703b2c5SNicholas Bellinger * Locate the underlying TCM struct se_lun from sc->device->lun 3833703b2c5SNicholas Bellinger */ 3845951146dSAndy Grover if (transport_lookup_tmr_lun(se_cmd, sc->device->lun) < 0) 3853703b2c5SNicholas Bellinger goto release; 3863703b2c5SNicholas Bellinger /* 3873703b2c5SNicholas Bellinger * Queue the TMR to TCM Core and sleep waiting for tcm_loop_queue_tm_rsp() 3883703b2c5SNicholas Bellinger * to wake us up. 3893703b2c5SNicholas Bellinger */ 3903703b2c5SNicholas Bellinger transport_generic_handle_tmr(se_cmd); 3913703b2c5SNicholas Bellinger wait_event(tl_tmr->tl_tmr_wait, atomic_read(&tl_tmr->tmr_complete)); 3923703b2c5SNicholas Bellinger /* 3933703b2c5SNicholas Bellinger * The TMR LUN_RESET has completed, check the response status and 3943703b2c5SNicholas Bellinger * then release allocations. 3953703b2c5SNicholas Bellinger */ 3963703b2c5SNicholas Bellinger ret = (se_cmd->se_tmr_req->response == TMR_FUNCTION_COMPLETE) ? 3973703b2c5SNicholas Bellinger SUCCESS : FAILED; 3983703b2c5SNicholas Bellinger release: 3993703b2c5SNicholas Bellinger if (se_cmd) 40082f1c8a4SChristoph Hellwig transport_generic_free_cmd(se_cmd, 1); 4013703b2c5SNicholas Bellinger else 4023703b2c5SNicholas Bellinger kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); 4033703b2c5SNicholas Bellinger kfree(tl_tmr); 4043703b2c5SNicholas Bellinger return ret; 4053703b2c5SNicholas Bellinger } 4063703b2c5SNicholas Bellinger 4073703b2c5SNicholas Bellinger static int tcm_loop_slave_alloc(struct scsi_device *sd) 4083703b2c5SNicholas Bellinger { 4093703b2c5SNicholas Bellinger set_bit(QUEUE_FLAG_BIDI, &sd->request_queue->queue_flags); 4103703b2c5SNicholas Bellinger return 0; 4113703b2c5SNicholas Bellinger } 4123703b2c5SNicholas Bellinger 4133703b2c5SNicholas Bellinger static int tcm_loop_slave_configure(struct scsi_device *sd) 4143703b2c5SNicholas Bellinger { 4153703b2c5SNicholas Bellinger return 0; 4163703b2c5SNicholas Bellinger } 4173703b2c5SNicholas Bellinger 4183703b2c5SNicholas Bellinger static struct scsi_host_template tcm_loop_driver_template = { 4193703b2c5SNicholas Bellinger .proc_info = tcm_loop_proc_info, 4203703b2c5SNicholas Bellinger .proc_name = "tcm_loopback", 4213703b2c5SNicholas Bellinger .name = "TCM_Loopback", 4223703b2c5SNicholas Bellinger .queuecommand = tcm_loop_queuecommand, 4233703b2c5SNicholas Bellinger .change_queue_depth = tcm_loop_change_queue_depth, 4243703b2c5SNicholas Bellinger .eh_device_reset_handler = tcm_loop_device_reset, 4253703b2c5SNicholas Bellinger .can_queue = TL_SCSI_CAN_QUEUE, 4263703b2c5SNicholas Bellinger .this_id = -1, 4273703b2c5SNicholas Bellinger .sg_tablesize = TL_SCSI_SG_TABLESIZE, 4283703b2c5SNicholas Bellinger .cmd_per_lun = TL_SCSI_CMD_PER_LUN, 4293703b2c5SNicholas Bellinger .max_sectors = TL_SCSI_MAX_SECTORS, 4303703b2c5SNicholas Bellinger .use_clustering = DISABLE_CLUSTERING, 4313703b2c5SNicholas Bellinger .slave_alloc = tcm_loop_slave_alloc, 4323703b2c5SNicholas Bellinger .slave_configure = tcm_loop_slave_configure, 4333703b2c5SNicholas Bellinger .module = THIS_MODULE, 4343703b2c5SNicholas Bellinger }; 4353703b2c5SNicholas Bellinger 4363703b2c5SNicholas Bellinger static int tcm_loop_driver_probe(struct device *dev) 4373703b2c5SNicholas Bellinger { 4383703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 4393703b2c5SNicholas Bellinger struct Scsi_Host *sh; 4403703b2c5SNicholas Bellinger int error; 4413703b2c5SNicholas Bellinger 4423703b2c5SNicholas Bellinger tl_hba = to_tcm_loop_hba(dev); 4433703b2c5SNicholas Bellinger 4443703b2c5SNicholas Bellinger sh = scsi_host_alloc(&tcm_loop_driver_template, 4453703b2c5SNicholas Bellinger sizeof(struct tcm_loop_hba)); 4463703b2c5SNicholas Bellinger if (!sh) { 4476708bb27SAndy Grover pr_err("Unable to allocate struct scsi_host\n"); 4483703b2c5SNicholas Bellinger return -ENODEV; 4493703b2c5SNicholas Bellinger } 4503703b2c5SNicholas Bellinger tl_hba->sh = sh; 4513703b2c5SNicholas Bellinger 4523703b2c5SNicholas Bellinger /* 4533703b2c5SNicholas Bellinger * Assign the struct tcm_loop_hba pointer to struct Scsi_Host->hostdata 4543703b2c5SNicholas Bellinger */ 4553703b2c5SNicholas Bellinger *((struct tcm_loop_hba **)sh->hostdata) = tl_hba; 4563703b2c5SNicholas Bellinger /* 4573703b2c5SNicholas Bellinger * Setup single ID, Channel and LUN for now.. 4583703b2c5SNicholas Bellinger */ 4593703b2c5SNicholas Bellinger sh->max_id = 2; 4603703b2c5SNicholas Bellinger sh->max_lun = 0; 4613703b2c5SNicholas Bellinger sh->max_channel = 0; 4623703b2c5SNicholas Bellinger sh->max_cmd_len = TL_SCSI_MAX_CMD_LEN; 4633703b2c5SNicholas Bellinger 4643703b2c5SNicholas Bellinger error = scsi_add_host(sh, &tl_hba->dev); 4653703b2c5SNicholas Bellinger if (error) { 4666708bb27SAndy Grover pr_err("%s: scsi_add_host failed\n", __func__); 4673703b2c5SNicholas Bellinger scsi_host_put(sh); 4683703b2c5SNicholas Bellinger return -ENODEV; 4693703b2c5SNicholas Bellinger } 4703703b2c5SNicholas Bellinger return 0; 4713703b2c5SNicholas Bellinger } 4723703b2c5SNicholas Bellinger 4733703b2c5SNicholas Bellinger static int tcm_loop_driver_remove(struct device *dev) 4743703b2c5SNicholas Bellinger { 4753703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 4763703b2c5SNicholas Bellinger struct Scsi_Host *sh; 4773703b2c5SNicholas Bellinger 4783703b2c5SNicholas Bellinger tl_hba = to_tcm_loop_hba(dev); 4793703b2c5SNicholas Bellinger sh = tl_hba->sh; 4803703b2c5SNicholas Bellinger 4813703b2c5SNicholas Bellinger scsi_remove_host(sh); 4823703b2c5SNicholas Bellinger scsi_host_put(sh); 4833703b2c5SNicholas Bellinger return 0; 4843703b2c5SNicholas Bellinger } 4853703b2c5SNicholas Bellinger 4863703b2c5SNicholas Bellinger static void tcm_loop_release_adapter(struct device *dev) 4873703b2c5SNicholas Bellinger { 4883703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = to_tcm_loop_hba(dev); 4893703b2c5SNicholas Bellinger 4903703b2c5SNicholas Bellinger kfree(tl_hba); 4913703b2c5SNicholas Bellinger } 4923703b2c5SNicholas Bellinger 4933703b2c5SNicholas Bellinger /* 4943703b2c5SNicholas Bellinger * Called from tcm_loop_make_scsi_hba() in tcm_loop_configfs.c 4953703b2c5SNicholas Bellinger */ 4963703b2c5SNicholas Bellinger static int tcm_loop_setup_hba_bus(struct tcm_loop_hba *tl_hba, int tcm_loop_host_id) 4973703b2c5SNicholas Bellinger { 4983703b2c5SNicholas Bellinger int ret; 4993703b2c5SNicholas Bellinger 5003703b2c5SNicholas Bellinger tl_hba->dev.bus = &tcm_loop_lld_bus; 5013703b2c5SNicholas Bellinger tl_hba->dev.parent = tcm_loop_primary; 5023703b2c5SNicholas Bellinger tl_hba->dev.release = &tcm_loop_release_adapter; 5033703b2c5SNicholas Bellinger dev_set_name(&tl_hba->dev, "tcm_loop_adapter_%d", tcm_loop_host_id); 5043703b2c5SNicholas Bellinger 5053703b2c5SNicholas Bellinger ret = device_register(&tl_hba->dev); 5063703b2c5SNicholas Bellinger if (ret) { 5076708bb27SAndy Grover pr_err("device_register() failed for" 5083703b2c5SNicholas Bellinger " tl_hba->dev: %d\n", ret); 5093703b2c5SNicholas Bellinger return -ENODEV; 5103703b2c5SNicholas Bellinger } 5113703b2c5SNicholas Bellinger 5123703b2c5SNicholas Bellinger return 0; 5133703b2c5SNicholas Bellinger } 5143703b2c5SNicholas Bellinger 5153703b2c5SNicholas Bellinger /* 5163703b2c5SNicholas Bellinger * Called from tcm_loop_fabric_init() in tcl_loop_fabric.c to load the emulated 5173703b2c5SNicholas Bellinger * tcm_loop SCSI bus. 5183703b2c5SNicholas Bellinger */ 5193703b2c5SNicholas Bellinger static int tcm_loop_alloc_core_bus(void) 5203703b2c5SNicholas Bellinger { 5213703b2c5SNicholas Bellinger int ret; 5223703b2c5SNicholas Bellinger 5233703b2c5SNicholas Bellinger tcm_loop_primary = root_device_register("tcm_loop_0"); 5243703b2c5SNicholas Bellinger if (IS_ERR(tcm_loop_primary)) { 5256708bb27SAndy Grover pr_err("Unable to allocate tcm_loop_primary\n"); 5263703b2c5SNicholas Bellinger return PTR_ERR(tcm_loop_primary); 5273703b2c5SNicholas Bellinger } 5283703b2c5SNicholas Bellinger 5293703b2c5SNicholas Bellinger ret = bus_register(&tcm_loop_lld_bus); 5303703b2c5SNicholas Bellinger if (ret) { 5316708bb27SAndy Grover pr_err("bus_register() failed for tcm_loop_lld_bus\n"); 5323703b2c5SNicholas Bellinger goto dev_unreg; 5333703b2c5SNicholas Bellinger } 5343703b2c5SNicholas Bellinger 5353703b2c5SNicholas Bellinger ret = driver_register(&tcm_loop_driverfs); 5363703b2c5SNicholas Bellinger if (ret) { 5376708bb27SAndy Grover pr_err("driver_register() failed for" 5383703b2c5SNicholas Bellinger "tcm_loop_driverfs\n"); 5393703b2c5SNicholas Bellinger goto bus_unreg; 5403703b2c5SNicholas Bellinger } 5413703b2c5SNicholas Bellinger 5426708bb27SAndy Grover pr_debug("Initialized TCM Loop Core Bus\n"); 5433703b2c5SNicholas Bellinger return ret; 5443703b2c5SNicholas Bellinger 5453703b2c5SNicholas Bellinger bus_unreg: 5463703b2c5SNicholas Bellinger bus_unregister(&tcm_loop_lld_bus); 5473703b2c5SNicholas Bellinger dev_unreg: 5483703b2c5SNicholas Bellinger root_device_unregister(tcm_loop_primary); 5493703b2c5SNicholas Bellinger return ret; 5503703b2c5SNicholas Bellinger } 5513703b2c5SNicholas Bellinger 5523703b2c5SNicholas Bellinger static void tcm_loop_release_core_bus(void) 5533703b2c5SNicholas Bellinger { 5543703b2c5SNicholas Bellinger driver_unregister(&tcm_loop_driverfs); 5553703b2c5SNicholas Bellinger bus_unregister(&tcm_loop_lld_bus); 5563703b2c5SNicholas Bellinger root_device_unregister(tcm_loop_primary); 5573703b2c5SNicholas Bellinger 5586708bb27SAndy Grover pr_debug("Releasing TCM Loop Core BUS\n"); 5593703b2c5SNicholas Bellinger } 5603703b2c5SNicholas Bellinger 5613703b2c5SNicholas Bellinger static char *tcm_loop_get_fabric_name(void) 5623703b2c5SNicholas Bellinger { 5633703b2c5SNicholas Bellinger return "loopback"; 5643703b2c5SNicholas Bellinger } 5653703b2c5SNicholas Bellinger 5663703b2c5SNicholas Bellinger static u8 tcm_loop_get_fabric_proto_ident(struct se_portal_group *se_tpg) 5673703b2c5SNicholas Bellinger { 5683703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = 5693703b2c5SNicholas Bellinger (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr; 5703703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 5713703b2c5SNicholas Bellinger /* 5723703b2c5SNicholas Bellinger * tl_proto_id is set at tcm_loop_configfs.c:tcm_loop_make_scsi_hba() 5733703b2c5SNicholas Bellinger * time based on the protocol dependent prefix of the passed configfs group. 5743703b2c5SNicholas Bellinger * 5753703b2c5SNicholas Bellinger * Based upon tl_proto_id, TCM_Loop emulates the requested fabric 5763703b2c5SNicholas Bellinger * ProtocolID using target_core_fabric_lib.c symbols. 5773703b2c5SNicholas Bellinger */ 5783703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 5793703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 5803703b2c5SNicholas Bellinger return sas_get_fabric_proto_ident(se_tpg); 5813703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 5823703b2c5SNicholas Bellinger return fc_get_fabric_proto_ident(se_tpg); 5833703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 5843703b2c5SNicholas Bellinger return iscsi_get_fabric_proto_ident(se_tpg); 5853703b2c5SNicholas Bellinger default: 5866708bb27SAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 5873703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 5883703b2c5SNicholas Bellinger break; 5893703b2c5SNicholas Bellinger } 5903703b2c5SNicholas Bellinger 5913703b2c5SNicholas Bellinger return sas_get_fabric_proto_ident(se_tpg); 5923703b2c5SNicholas Bellinger } 5933703b2c5SNicholas Bellinger 5943703b2c5SNicholas Bellinger static char *tcm_loop_get_endpoint_wwn(struct se_portal_group *se_tpg) 5953703b2c5SNicholas Bellinger { 5963703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = 5973703b2c5SNicholas Bellinger (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr; 5983703b2c5SNicholas Bellinger /* 5993703b2c5SNicholas Bellinger * Return the passed NAA identifier for the SAS Target Port 6003703b2c5SNicholas Bellinger */ 6013703b2c5SNicholas Bellinger return &tl_tpg->tl_hba->tl_wwn_address[0]; 6023703b2c5SNicholas Bellinger } 6033703b2c5SNicholas Bellinger 6043703b2c5SNicholas Bellinger static u16 tcm_loop_get_tag(struct se_portal_group *se_tpg) 6053703b2c5SNicholas Bellinger { 6063703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = 6073703b2c5SNicholas Bellinger (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr; 6083703b2c5SNicholas Bellinger /* 6093703b2c5SNicholas Bellinger * This Tag is used when forming SCSI Name identifier in EVPD=1 0x83 6103703b2c5SNicholas Bellinger * to represent the SCSI Target Port. 6113703b2c5SNicholas Bellinger */ 6123703b2c5SNicholas Bellinger return tl_tpg->tl_tpgt; 6133703b2c5SNicholas Bellinger } 6143703b2c5SNicholas Bellinger 6153703b2c5SNicholas Bellinger static u32 tcm_loop_get_default_depth(struct se_portal_group *se_tpg) 6163703b2c5SNicholas Bellinger { 6173703b2c5SNicholas Bellinger return 1; 6183703b2c5SNicholas Bellinger } 6193703b2c5SNicholas Bellinger 6203703b2c5SNicholas Bellinger static u32 tcm_loop_get_pr_transport_id( 6213703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 6223703b2c5SNicholas Bellinger struct se_node_acl *se_nacl, 6233703b2c5SNicholas Bellinger struct t10_pr_registration *pr_reg, 6243703b2c5SNicholas Bellinger int *format_code, 6253703b2c5SNicholas Bellinger unsigned char *buf) 6263703b2c5SNicholas Bellinger { 6273703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = 6283703b2c5SNicholas Bellinger (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr; 6293703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 6303703b2c5SNicholas Bellinger 6313703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 6323703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 6333703b2c5SNicholas Bellinger return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6343703b2c5SNicholas Bellinger format_code, buf); 6353703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 6363703b2c5SNicholas Bellinger return fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6373703b2c5SNicholas Bellinger format_code, buf); 6383703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 6393703b2c5SNicholas Bellinger return iscsi_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6403703b2c5SNicholas Bellinger format_code, buf); 6413703b2c5SNicholas Bellinger default: 6426708bb27SAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 6433703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 6443703b2c5SNicholas Bellinger break; 6453703b2c5SNicholas Bellinger } 6463703b2c5SNicholas Bellinger 6473703b2c5SNicholas Bellinger return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6483703b2c5SNicholas Bellinger format_code, buf); 6493703b2c5SNicholas Bellinger } 6503703b2c5SNicholas Bellinger 6513703b2c5SNicholas Bellinger static u32 tcm_loop_get_pr_transport_id_len( 6523703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 6533703b2c5SNicholas Bellinger struct se_node_acl *se_nacl, 6543703b2c5SNicholas Bellinger struct t10_pr_registration *pr_reg, 6553703b2c5SNicholas Bellinger int *format_code) 6563703b2c5SNicholas Bellinger { 6573703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = 6583703b2c5SNicholas Bellinger (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr; 6593703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 6603703b2c5SNicholas Bellinger 6613703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 6623703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 6633703b2c5SNicholas Bellinger return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6643703b2c5SNicholas Bellinger format_code); 6653703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 6663703b2c5SNicholas Bellinger return fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6673703b2c5SNicholas Bellinger format_code); 6683703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 6693703b2c5SNicholas Bellinger return iscsi_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6703703b2c5SNicholas Bellinger format_code); 6713703b2c5SNicholas Bellinger default: 6726708bb27SAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 6733703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 6743703b2c5SNicholas Bellinger break; 6753703b2c5SNicholas Bellinger } 6763703b2c5SNicholas Bellinger 6773703b2c5SNicholas Bellinger return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6783703b2c5SNicholas Bellinger format_code); 6793703b2c5SNicholas Bellinger } 6803703b2c5SNicholas Bellinger 6813703b2c5SNicholas Bellinger /* 6823703b2c5SNicholas Bellinger * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above 6833703b2c5SNicholas Bellinger * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations. 6843703b2c5SNicholas Bellinger */ 6853703b2c5SNicholas Bellinger static char *tcm_loop_parse_pr_out_transport_id( 6863703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 6873703b2c5SNicholas Bellinger const char *buf, 6883703b2c5SNicholas Bellinger u32 *out_tid_len, 6893703b2c5SNicholas Bellinger char **port_nexus_ptr) 6903703b2c5SNicholas Bellinger { 6913703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = 6923703b2c5SNicholas Bellinger (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr; 6933703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 6943703b2c5SNicholas Bellinger 6953703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 6963703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 6973703b2c5SNicholas Bellinger return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 6983703b2c5SNicholas Bellinger port_nexus_ptr); 6993703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 7003703b2c5SNicholas Bellinger return fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 7013703b2c5SNicholas Bellinger port_nexus_ptr); 7023703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 7033703b2c5SNicholas Bellinger return iscsi_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 7043703b2c5SNicholas Bellinger port_nexus_ptr); 7053703b2c5SNicholas Bellinger default: 7066708bb27SAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 7073703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 7083703b2c5SNicholas Bellinger break; 7093703b2c5SNicholas Bellinger } 7103703b2c5SNicholas Bellinger 7113703b2c5SNicholas Bellinger return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 7123703b2c5SNicholas Bellinger port_nexus_ptr); 7133703b2c5SNicholas Bellinger } 7143703b2c5SNicholas Bellinger 7153703b2c5SNicholas Bellinger /* 7163703b2c5SNicholas Bellinger * Returning (1) here allows for target_core_mod struct se_node_acl to be generated 7173703b2c5SNicholas Bellinger * based upon the incoming fabric dependent SCSI Initiator Port 7183703b2c5SNicholas Bellinger */ 7193703b2c5SNicholas Bellinger static int tcm_loop_check_demo_mode(struct se_portal_group *se_tpg) 7203703b2c5SNicholas Bellinger { 7213703b2c5SNicholas Bellinger return 1; 7223703b2c5SNicholas Bellinger } 7233703b2c5SNicholas Bellinger 7243703b2c5SNicholas Bellinger static int tcm_loop_check_demo_mode_cache(struct se_portal_group *se_tpg) 7253703b2c5SNicholas Bellinger { 7263703b2c5SNicholas Bellinger return 0; 7273703b2c5SNicholas Bellinger } 7283703b2c5SNicholas Bellinger 7293703b2c5SNicholas Bellinger /* 7303703b2c5SNicholas Bellinger * Allow I_T Nexus full READ-WRITE access without explict Initiator Node ACLs for 7313703b2c5SNicholas Bellinger * local virtual Linux/SCSI LLD passthrough into VM hypervisor guest 7323703b2c5SNicholas Bellinger */ 7333703b2c5SNicholas Bellinger static int tcm_loop_check_demo_mode_write_protect(struct se_portal_group *se_tpg) 7343703b2c5SNicholas Bellinger { 7353703b2c5SNicholas Bellinger return 0; 7363703b2c5SNicholas Bellinger } 7373703b2c5SNicholas Bellinger 7383703b2c5SNicholas Bellinger /* 7393703b2c5SNicholas Bellinger * Because TCM_Loop does not use explict ACLs and MappedLUNs, this will 7403703b2c5SNicholas Bellinger * never be called for TCM_Loop by target_core_fabric_configfs.c code. 7413703b2c5SNicholas Bellinger * It has been added here as a nop for target_fabric_tf_ops_check() 7423703b2c5SNicholas Bellinger */ 7433703b2c5SNicholas Bellinger static int tcm_loop_check_prod_mode_write_protect(struct se_portal_group *se_tpg) 7443703b2c5SNicholas Bellinger { 7453703b2c5SNicholas Bellinger return 0; 7463703b2c5SNicholas Bellinger } 7473703b2c5SNicholas Bellinger 7483703b2c5SNicholas Bellinger static struct se_node_acl *tcm_loop_tpg_alloc_fabric_acl( 7493703b2c5SNicholas Bellinger struct se_portal_group *se_tpg) 7503703b2c5SNicholas Bellinger { 7513703b2c5SNicholas Bellinger struct tcm_loop_nacl *tl_nacl; 7523703b2c5SNicholas Bellinger 7533703b2c5SNicholas Bellinger tl_nacl = kzalloc(sizeof(struct tcm_loop_nacl), GFP_KERNEL); 7543703b2c5SNicholas Bellinger if (!tl_nacl) { 7556708bb27SAndy Grover pr_err("Unable to allocate struct tcm_loop_nacl\n"); 7563703b2c5SNicholas Bellinger return NULL; 7573703b2c5SNicholas Bellinger } 7583703b2c5SNicholas Bellinger 7593703b2c5SNicholas Bellinger return &tl_nacl->se_node_acl; 7603703b2c5SNicholas Bellinger } 7613703b2c5SNicholas Bellinger 7623703b2c5SNicholas Bellinger static void tcm_loop_tpg_release_fabric_acl( 7633703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 7643703b2c5SNicholas Bellinger struct se_node_acl *se_nacl) 7653703b2c5SNicholas Bellinger { 7663703b2c5SNicholas Bellinger struct tcm_loop_nacl *tl_nacl = container_of(se_nacl, 7673703b2c5SNicholas Bellinger struct tcm_loop_nacl, se_node_acl); 7683703b2c5SNicholas Bellinger 7693703b2c5SNicholas Bellinger kfree(tl_nacl); 7703703b2c5SNicholas Bellinger } 7713703b2c5SNicholas Bellinger 7723703b2c5SNicholas Bellinger static u32 tcm_loop_get_inst_index(struct se_portal_group *se_tpg) 7733703b2c5SNicholas Bellinger { 7743703b2c5SNicholas Bellinger return 1; 7753703b2c5SNicholas Bellinger } 7763703b2c5SNicholas Bellinger 7773703b2c5SNicholas Bellinger static int tcm_loop_is_state_remove(struct se_cmd *se_cmd) 7783703b2c5SNicholas Bellinger { 7793703b2c5SNicholas Bellinger /* 7803703b2c5SNicholas Bellinger * Assume struct scsi_cmnd is not in remove state.. 7813703b2c5SNicholas Bellinger */ 7823703b2c5SNicholas Bellinger return 0; 7833703b2c5SNicholas Bellinger } 7843703b2c5SNicholas Bellinger 7853703b2c5SNicholas Bellinger static int tcm_loop_sess_logged_in(struct se_session *se_sess) 7863703b2c5SNicholas Bellinger { 7873703b2c5SNicholas Bellinger /* 7883703b2c5SNicholas Bellinger * Assume that TL Nexus is always active 7893703b2c5SNicholas Bellinger */ 7903703b2c5SNicholas Bellinger return 1; 7913703b2c5SNicholas Bellinger } 7923703b2c5SNicholas Bellinger 7933703b2c5SNicholas Bellinger static u32 tcm_loop_sess_get_index(struct se_session *se_sess) 7943703b2c5SNicholas Bellinger { 7953703b2c5SNicholas Bellinger return 1; 7963703b2c5SNicholas Bellinger } 7973703b2c5SNicholas Bellinger 7983703b2c5SNicholas Bellinger static void tcm_loop_set_default_node_attributes(struct se_node_acl *se_acl) 7993703b2c5SNicholas Bellinger { 8003703b2c5SNicholas Bellinger return; 8013703b2c5SNicholas Bellinger } 8023703b2c5SNicholas Bellinger 8033703b2c5SNicholas Bellinger static u32 tcm_loop_get_task_tag(struct se_cmd *se_cmd) 8043703b2c5SNicholas Bellinger { 8053703b2c5SNicholas Bellinger return 1; 8063703b2c5SNicholas Bellinger } 8073703b2c5SNicholas Bellinger 8083703b2c5SNicholas Bellinger static int tcm_loop_get_cmd_state(struct se_cmd *se_cmd) 8093703b2c5SNicholas Bellinger { 8103703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 8113703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 8123703b2c5SNicholas Bellinger 8133703b2c5SNicholas Bellinger return tl_cmd->sc_cmd_state; 8143703b2c5SNicholas Bellinger } 8153703b2c5SNicholas Bellinger 8163703b2c5SNicholas Bellinger static int tcm_loop_shutdown_session(struct se_session *se_sess) 8173703b2c5SNicholas Bellinger { 8183703b2c5SNicholas Bellinger return 0; 8193703b2c5SNicholas Bellinger } 8203703b2c5SNicholas Bellinger 8213703b2c5SNicholas Bellinger static void tcm_loop_close_session(struct se_session *se_sess) 8223703b2c5SNicholas Bellinger { 8233703b2c5SNicholas Bellinger return; 8243703b2c5SNicholas Bellinger }; 8253703b2c5SNicholas Bellinger 8263703b2c5SNicholas Bellinger static void tcm_loop_stop_session( 8273703b2c5SNicholas Bellinger struct se_session *se_sess, 8283703b2c5SNicholas Bellinger int sess_sleep, 8293703b2c5SNicholas Bellinger int conn_sleep) 8303703b2c5SNicholas Bellinger { 8313703b2c5SNicholas Bellinger return; 8323703b2c5SNicholas Bellinger } 8333703b2c5SNicholas Bellinger 8343703b2c5SNicholas Bellinger static void tcm_loop_fall_back_to_erl0(struct se_session *se_sess) 8353703b2c5SNicholas Bellinger { 8363703b2c5SNicholas Bellinger return; 8373703b2c5SNicholas Bellinger } 8383703b2c5SNicholas Bellinger 8393703b2c5SNicholas Bellinger static int tcm_loop_write_pending(struct se_cmd *se_cmd) 8403703b2c5SNicholas Bellinger { 8413703b2c5SNicholas Bellinger /* 8423703b2c5SNicholas Bellinger * Since Linux/SCSI has already sent down a struct scsi_cmnd 8433703b2c5SNicholas Bellinger * sc->sc_data_direction of DMA_TO_DEVICE with struct scatterlist array 8443703b2c5SNicholas Bellinger * memory, and memory has already been mapped to struct se_cmd->t_mem_list 8453703b2c5SNicholas Bellinger * format with transport_generic_map_mem_to_cmd(). 8463703b2c5SNicholas Bellinger * 8473703b2c5SNicholas Bellinger * We now tell TCM to add this WRITE CDB directly into the TCM storage 8483703b2c5SNicholas Bellinger * object execution queue. 8493703b2c5SNicholas Bellinger */ 8503703b2c5SNicholas Bellinger transport_generic_process_write(se_cmd); 8513703b2c5SNicholas Bellinger return 0; 8523703b2c5SNicholas Bellinger } 8533703b2c5SNicholas Bellinger 8543703b2c5SNicholas Bellinger static int tcm_loop_write_pending_status(struct se_cmd *se_cmd) 8553703b2c5SNicholas Bellinger { 8563703b2c5SNicholas Bellinger return 0; 8573703b2c5SNicholas Bellinger } 8583703b2c5SNicholas Bellinger 8593703b2c5SNicholas Bellinger static int tcm_loop_queue_data_in(struct se_cmd *se_cmd) 8603703b2c5SNicholas Bellinger { 8613703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 8623703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 8633703b2c5SNicholas Bellinger struct scsi_cmnd *sc = tl_cmd->sc; 8643703b2c5SNicholas Bellinger 8656708bb27SAndy Grover pr_debug("tcm_loop_queue_data_in() called for scsi_cmnd: %p" 8663703b2c5SNicholas Bellinger " cdb: 0x%02x\n", sc, sc->cmnd[0]); 8673703b2c5SNicholas Bellinger 8683703b2c5SNicholas Bellinger sc->result = SAM_STAT_GOOD; 8693703b2c5SNicholas Bellinger set_host_byte(sc, DID_OK); 8703703b2c5SNicholas Bellinger sc->scsi_done(sc); 8713703b2c5SNicholas Bellinger return 0; 8723703b2c5SNicholas Bellinger } 8733703b2c5SNicholas Bellinger 8743703b2c5SNicholas Bellinger static int tcm_loop_queue_status(struct se_cmd *se_cmd) 8753703b2c5SNicholas Bellinger { 8763703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 8773703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 8783703b2c5SNicholas Bellinger struct scsi_cmnd *sc = tl_cmd->sc; 8793703b2c5SNicholas Bellinger 8806708bb27SAndy Grover pr_debug("tcm_loop_queue_status() called for scsi_cmnd: %p" 8813703b2c5SNicholas Bellinger " cdb: 0x%02x\n", sc, sc->cmnd[0]); 8823703b2c5SNicholas Bellinger 8833703b2c5SNicholas Bellinger if (se_cmd->sense_buffer && 8843703b2c5SNicholas Bellinger ((se_cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || 8853703b2c5SNicholas Bellinger (se_cmd->se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { 8863703b2c5SNicholas Bellinger 8875951146dSAndy Grover memcpy(sc->sense_buffer, se_cmd->sense_buffer, 8883703b2c5SNicholas Bellinger SCSI_SENSE_BUFFERSIZE); 8893703b2c5SNicholas Bellinger sc->result = SAM_STAT_CHECK_CONDITION; 8903703b2c5SNicholas Bellinger set_driver_byte(sc, DRIVER_SENSE); 8913703b2c5SNicholas Bellinger } else 8923703b2c5SNicholas Bellinger sc->result = se_cmd->scsi_status; 8933703b2c5SNicholas Bellinger 8943703b2c5SNicholas Bellinger set_host_byte(sc, DID_OK); 8953703b2c5SNicholas Bellinger sc->scsi_done(sc); 8963703b2c5SNicholas Bellinger return 0; 8973703b2c5SNicholas Bellinger } 8983703b2c5SNicholas Bellinger 8993703b2c5SNicholas Bellinger static int tcm_loop_queue_tm_rsp(struct se_cmd *se_cmd) 9003703b2c5SNicholas Bellinger { 9013703b2c5SNicholas Bellinger struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 9023703b2c5SNicholas Bellinger struct tcm_loop_tmr *tl_tmr = se_tmr->fabric_tmr_ptr; 9033703b2c5SNicholas Bellinger /* 9043703b2c5SNicholas Bellinger * The SCSI EH thread will be sleeping on se_tmr->tl_tmr_wait, go ahead 9053703b2c5SNicholas Bellinger * and wake up the wait_queue_head_t in tcm_loop_device_reset() 9063703b2c5SNicholas Bellinger */ 9073703b2c5SNicholas Bellinger atomic_set(&tl_tmr->tmr_complete, 1); 9083703b2c5SNicholas Bellinger wake_up(&tl_tmr->tl_tmr_wait); 9093703b2c5SNicholas Bellinger return 0; 9103703b2c5SNicholas Bellinger } 9113703b2c5SNicholas Bellinger 9123703b2c5SNicholas Bellinger static u16 tcm_loop_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_length) 9133703b2c5SNicholas Bellinger { 9143703b2c5SNicholas Bellinger return 0; 9153703b2c5SNicholas Bellinger } 9163703b2c5SNicholas Bellinger 9173703b2c5SNicholas Bellinger static u16 tcm_loop_get_fabric_sense_len(void) 9183703b2c5SNicholas Bellinger { 9193703b2c5SNicholas Bellinger return 0; 9203703b2c5SNicholas Bellinger } 9213703b2c5SNicholas Bellinger 9223703b2c5SNicholas Bellinger static char *tcm_loop_dump_proto_id(struct tcm_loop_hba *tl_hba) 9233703b2c5SNicholas Bellinger { 9243703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 9253703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 9263703b2c5SNicholas Bellinger return "SAS"; 9273703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 9283703b2c5SNicholas Bellinger return "FCP"; 9293703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 9303703b2c5SNicholas Bellinger return "iSCSI"; 9313703b2c5SNicholas Bellinger default: 9323703b2c5SNicholas Bellinger break; 9333703b2c5SNicholas Bellinger } 9343703b2c5SNicholas Bellinger 9353703b2c5SNicholas Bellinger return "Unknown"; 9363703b2c5SNicholas Bellinger } 9373703b2c5SNicholas Bellinger 9383703b2c5SNicholas Bellinger /* Start items for tcm_loop_port_cit */ 9393703b2c5SNicholas Bellinger 9403703b2c5SNicholas Bellinger static int tcm_loop_port_link( 9413703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 9423703b2c5SNicholas Bellinger struct se_lun *lun) 9433703b2c5SNicholas Bellinger { 9443703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 9453703b2c5SNicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 9463703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 9473703b2c5SNicholas Bellinger 9483703b2c5SNicholas Bellinger atomic_inc(&tl_tpg->tl_tpg_port_count); 9493703b2c5SNicholas Bellinger smp_mb__after_atomic_inc(); 9503703b2c5SNicholas Bellinger /* 9513703b2c5SNicholas Bellinger * Add Linux/SCSI struct scsi_device by HCTL 9523703b2c5SNicholas Bellinger */ 9533703b2c5SNicholas Bellinger scsi_add_device(tl_hba->sh, 0, tl_tpg->tl_tpgt, lun->unpacked_lun); 9543703b2c5SNicholas Bellinger 9556708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Port Link Successful\n"); 9563703b2c5SNicholas Bellinger return 0; 9573703b2c5SNicholas Bellinger } 9583703b2c5SNicholas Bellinger 9593703b2c5SNicholas Bellinger static void tcm_loop_port_unlink( 9603703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 9613703b2c5SNicholas Bellinger struct se_lun *se_lun) 9623703b2c5SNicholas Bellinger { 9633703b2c5SNicholas Bellinger struct scsi_device *sd; 9643703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 9653703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 9663703b2c5SNicholas Bellinger 9673703b2c5SNicholas Bellinger tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, tl_se_tpg); 9683703b2c5SNicholas Bellinger tl_hba = tl_tpg->tl_hba; 9693703b2c5SNicholas Bellinger 9703703b2c5SNicholas Bellinger sd = scsi_device_lookup(tl_hba->sh, 0, tl_tpg->tl_tpgt, 9713703b2c5SNicholas Bellinger se_lun->unpacked_lun); 9723703b2c5SNicholas Bellinger if (!sd) { 9736708bb27SAndy Grover pr_err("Unable to locate struct scsi_device for %d:%d:" 9743703b2c5SNicholas Bellinger "%d\n", 0, tl_tpg->tl_tpgt, se_lun->unpacked_lun); 9753703b2c5SNicholas Bellinger return; 9763703b2c5SNicholas Bellinger } 9773703b2c5SNicholas Bellinger /* 9783703b2c5SNicholas Bellinger * Remove Linux/SCSI struct scsi_device by HCTL 9793703b2c5SNicholas Bellinger */ 9803703b2c5SNicholas Bellinger scsi_remove_device(sd); 9813703b2c5SNicholas Bellinger scsi_device_put(sd); 9823703b2c5SNicholas Bellinger 9833703b2c5SNicholas Bellinger atomic_dec(&tl_tpg->tl_tpg_port_count); 9843703b2c5SNicholas Bellinger smp_mb__after_atomic_dec(); 9853703b2c5SNicholas Bellinger 9866708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Port Unlink Successful\n"); 9873703b2c5SNicholas Bellinger } 9883703b2c5SNicholas Bellinger 9893703b2c5SNicholas Bellinger /* End items for tcm_loop_port_cit */ 9903703b2c5SNicholas Bellinger 9913703b2c5SNicholas Bellinger /* Start items for tcm_loop_nexus_cit */ 9923703b2c5SNicholas Bellinger 9933703b2c5SNicholas Bellinger static int tcm_loop_make_nexus( 9943703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg, 9953703b2c5SNicholas Bellinger const char *name) 9963703b2c5SNicholas Bellinger { 9973703b2c5SNicholas Bellinger struct se_portal_group *se_tpg; 9983703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 9993703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus; 1000552523dcSDan Carpenter int ret = -ENOMEM; 10013703b2c5SNicholas Bellinger 10023703b2c5SNicholas Bellinger if (tl_tpg->tl_hba->tl_nexus) { 10036708bb27SAndy Grover pr_debug("tl_tpg->tl_hba->tl_nexus already exists\n"); 10043703b2c5SNicholas Bellinger return -EEXIST; 10053703b2c5SNicholas Bellinger } 10063703b2c5SNicholas Bellinger se_tpg = &tl_tpg->tl_se_tpg; 10073703b2c5SNicholas Bellinger 10083703b2c5SNicholas Bellinger tl_nexus = kzalloc(sizeof(struct tcm_loop_nexus), GFP_KERNEL); 10093703b2c5SNicholas Bellinger if (!tl_nexus) { 10106708bb27SAndy Grover pr_err("Unable to allocate struct tcm_loop_nexus\n"); 10113703b2c5SNicholas Bellinger return -ENOMEM; 10123703b2c5SNicholas Bellinger } 10133703b2c5SNicholas Bellinger /* 10143703b2c5SNicholas Bellinger * Initialize the struct se_session pointer 10153703b2c5SNicholas Bellinger */ 10163703b2c5SNicholas Bellinger tl_nexus->se_sess = transport_init_session(); 1017552523dcSDan Carpenter if (IS_ERR(tl_nexus->se_sess)) { 1018552523dcSDan Carpenter ret = PTR_ERR(tl_nexus->se_sess); 10193703b2c5SNicholas Bellinger goto out; 1020552523dcSDan Carpenter } 10213703b2c5SNicholas Bellinger /* 10223703b2c5SNicholas Bellinger * Since we are running in 'demo mode' this call with generate a 10233703b2c5SNicholas Bellinger * struct se_node_acl for the tcm_loop struct se_portal_group with the SCSI 10243703b2c5SNicholas Bellinger * Initiator port name of the passed configfs group 'name'. 10253703b2c5SNicholas Bellinger */ 10263703b2c5SNicholas Bellinger tl_nexus->se_sess->se_node_acl = core_tpg_check_initiator_node_acl( 10273703b2c5SNicholas Bellinger se_tpg, (unsigned char *)name); 10283703b2c5SNicholas Bellinger if (!tl_nexus->se_sess->se_node_acl) { 10293703b2c5SNicholas Bellinger transport_free_session(tl_nexus->se_sess); 10303703b2c5SNicholas Bellinger goto out; 10313703b2c5SNicholas Bellinger } 10323703b2c5SNicholas Bellinger /* 10333703b2c5SNicholas Bellinger * Now, register the SAS I_T Nexus as active with the call to 10343703b2c5SNicholas Bellinger * transport_register_session() 10353703b2c5SNicholas Bellinger */ 10363703b2c5SNicholas Bellinger __transport_register_session(se_tpg, tl_nexus->se_sess->se_node_acl, 10375951146dSAndy Grover tl_nexus->se_sess, tl_nexus); 10383703b2c5SNicholas Bellinger tl_tpg->tl_hba->tl_nexus = tl_nexus; 10396708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Established I_T Nexus to emulated" 10403703b2c5SNicholas Bellinger " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba), 10413703b2c5SNicholas Bellinger name); 10423703b2c5SNicholas Bellinger return 0; 10433703b2c5SNicholas Bellinger 10443703b2c5SNicholas Bellinger out: 10453703b2c5SNicholas Bellinger kfree(tl_nexus); 1046552523dcSDan Carpenter return ret; 10473703b2c5SNicholas Bellinger } 10483703b2c5SNicholas Bellinger 10493703b2c5SNicholas Bellinger static int tcm_loop_drop_nexus( 10503703b2c5SNicholas Bellinger struct tcm_loop_tpg *tpg) 10513703b2c5SNicholas Bellinger { 10523703b2c5SNicholas Bellinger struct se_session *se_sess; 10533703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus; 10543703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tpg->tl_hba; 10553703b2c5SNicholas Bellinger 10563703b2c5SNicholas Bellinger tl_nexus = tpg->tl_hba->tl_nexus; 10573703b2c5SNicholas Bellinger if (!tl_nexus) 10583703b2c5SNicholas Bellinger return -ENODEV; 10593703b2c5SNicholas Bellinger 10603703b2c5SNicholas Bellinger se_sess = tl_nexus->se_sess; 10613703b2c5SNicholas Bellinger if (!se_sess) 10623703b2c5SNicholas Bellinger return -ENODEV; 10633703b2c5SNicholas Bellinger 10643703b2c5SNicholas Bellinger if (atomic_read(&tpg->tl_tpg_port_count)) { 10656708bb27SAndy Grover pr_err("Unable to remove TCM_Loop I_T Nexus with" 10663703b2c5SNicholas Bellinger " active TPG port count: %d\n", 10673703b2c5SNicholas Bellinger atomic_read(&tpg->tl_tpg_port_count)); 10683703b2c5SNicholas Bellinger return -EPERM; 10693703b2c5SNicholas Bellinger } 10703703b2c5SNicholas Bellinger 10716708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Removing I_T Nexus to emulated" 10723703b2c5SNicholas Bellinger " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba), 10733703b2c5SNicholas Bellinger tl_nexus->se_sess->se_node_acl->initiatorname); 10743703b2c5SNicholas Bellinger /* 10753703b2c5SNicholas Bellinger * Release the SCSI I_T Nexus to the emulated SAS Target Port 10763703b2c5SNicholas Bellinger */ 10773703b2c5SNicholas Bellinger transport_deregister_session(tl_nexus->se_sess); 10783703b2c5SNicholas Bellinger tpg->tl_hba->tl_nexus = NULL; 10793703b2c5SNicholas Bellinger kfree(tl_nexus); 10803703b2c5SNicholas Bellinger return 0; 10813703b2c5SNicholas Bellinger } 10823703b2c5SNicholas Bellinger 10833703b2c5SNicholas Bellinger /* End items for tcm_loop_nexus_cit */ 10843703b2c5SNicholas Bellinger 10853703b2c5SNicholas Bellinger static ssize_t tcm_loop_tpg_show_nexus( 10863703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 10873703b2c5SNicholas Bellinger char *page) 10883703b2c5SNicholas Bellinger { 10893703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 10903703b2c5SNicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 10913703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus; 10923703b2c5SNicholas Bellinger ssize_t ret; 10933703b2c5SNicholas Bellinger 10943703b2c5SNicholas Bellinger tl_nexus = tl_tpg->tl_hba->tl_nexus; 10953703b2c5SNicholas Bellinger if (!tl_nexus) 10963703b2c5SNicholas Bellinger return -ENODEV; 10973703b2c5SNicholas Bellinger 10983703b2c5SNicholas Bellinger ret = snprintf(page, PAGE_SIZE, "%s\n", 10993703b2c5SNicholas Bellinger tl_nexus->se_sess->se_node_acl->initiatorname); 11003703b2c5SNicholas Bellinger 11013703b2c5SNicholas Bellinger return ret; 11023703b2c5SNicholas Bellinger } 11033703b2c5SNicholas Bellinger 11043703b2c5SNicholas Bellinger static ssize_t tcm_loop_tpg_store_nexus( 11053703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 11063703b2c5SNicholas Bellinger const char *page, 11073703b2c5SNicholas Bellinger size_t count) 11083703b2c5SNicholas Bellinger { 11093703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 11103703b2c5SNicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 11113703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 11123703b2c5SNicholas Bellinger unsigned char i_port[TL_WWN_ADDR_LEN], *ptr, *port_ptr; 11133703b2c5SNicholas Bellinger int ret; 11143703b2c5SNicholas Bellinger /* 11153703b2c5SNicholas Bellinger * Shutdown the active I_T nexus if 'NULL' is passed.. 11163703b2c5SNicholas Bellinger */ 11173703b2c5SNicholas Bellinger if (!strncmp(page, "NULL", 4)) { 11183703b2c5SNicholas Bellinger ret = tcm_loop_drop_nexus(tl_tpg); 11193703b2c5SNicholas Bellinger return (!ret) ? count : ret; 11203703b2c5SNicholas Bellinger } 11213703b2c5SNicholas Bellinger /* 11223703b2c5SNicholas Bellinger * Otherwise make sure the passed virtual Initiator port WWN matches 11233703b2c5SNicholas Bellinger * the fabric protocol_id set in tcm_loop_make_scsi_hba(), and call 11243703b2c5SNicholas Bellinger * tcm_loop_make_nexus() 11253703b2c5SNicholas Bellinger */ 112660d645a4SDan Carpenter if (strlen(page) >= TL_WWN_ADDR_LEN) { 11276708bb27SAndy Grover pr_err("Emulated NAA Sas Address: %s, exceeds" 11283703b2c5SNicholas Bellinger " max: %d\n", page, TL_WWN_ADDR_LEN); 11293703b2c5SNicholas Bellinger return -EINVAL; 11303703b2c5SNicholas Bellinger } 11313703b2c5SNicholas Bellinger snprintf(&i_port[0], TL_WWN_ADDR_LEN, "%s", page); 11323703b2c5SNicholas Bellinger 11333703b2c5SNicholas Bellinger ptr = strstr(i_port, "naa."); 11343703b2c5SNicholas Bellinger if (ptr) { 11353703b2c5SNicholas Bellinger if (tl_hba->tl_proto_id != SCSI_PROTOCOL_SAS) { 11366708bb27SAndy Grover pr_err("Passed SAS Initiator Port %s does not" 11373703b2c5SNicholas Bellinger " match target port protoid: %s\n", i_port, 11383703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba)); 11393703b2c5SNicholas Bellinger return -EINVAL; 11403703b2c5SNicholas Bellinger } 11413703b2c5SNicholas Bellinger port_ptr = &i_port[0]; 11423703b2c5SNicholas Bellinger goto check_newline; 11433703b2c5SNicholas Bellinger } 11443703b2c5SNicholas Bellinger ptr = strstr(i_port, "fc."); 11453703b2c5SNicholas Bellinger if (ptr) { 11463703b2c5SNicholas Bellinger if (tl_hba->tl_proto_id != SCSI_PROTOCOL_FCP) { 11476708bb27SAndy Grover pr_err("Passed FCP Initiator Port %s does not" 11483703b2c5SNicholas Bellinger " match target port protoid: %s\n", i_port, 11493703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba)); 11503703b2c5SNicholas Bellinger return -EINVAL; 11513703b2c5SNicholas Bellinger } 11523703b2c5SNicholas Bellinger port_ptr = &i_port[3]; /* Skip over "fc." */ 11533703b2c5SNicholas Bellinger goto check_newline; 11543703b2c5SNicholas Bellinger } 11553703b2c5SNicholas Bellinger ptr = strstr(i_port, "iqn."); 11563703b2c5SNicholas Bellinger if (ptr) { 11573703b2c5SNicholas Bellinger if (tl_hba->tl_proto_id != SCSI_PROTOCOL_ISCSI) { 11586708bb27SAndy Grover pr_err("Passed iSCSI Initiator Port %s does not" 11593703b2c5SNicholas Bellinger " match target port protoid: %s\n", i_port, 11603703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba)); 11613703b2c5SNicholas Bellinger return -EINVAL; 11623703b2c5SNicholas Bellinger } 11633703b2c5SNicholas Bellinger port_ptr = &i_port[0]; 11643703b2c5SNicholas Bellinger goto check_newline; 11653703b2c5SNicholas Bellinger } 11666708bb27SAndy Grover pr_err("Unable to locate prefix for emulated Initiator Port:" 11673703b2c5SNicholas Bellinger " %s\n", i_port); 11683703b2c5SNicholas Bellinger return -EINVAL; 11693703b2c5SNicholas Bellinger /* 11703703b2c5SNicholas Bellinger * Clear any trailing newline for the NAA WWN 11713703b2c5SNicholas Bellinger */ 11723703b2c5SNicholas Bellinger check_newline: 11733703b2c5SNicholas Bellinger if (i_port[strlen(i_port)-1] == '\n') 11743703b2c5SNicholas Bellinger i_port[strlen(i_port)-1] = '\0'; 11753703b2c5SNicholas Bellinger 11763703b2c5SNicholas Bellinger ret = tcm_loop_make_nexus(tl_tpg, port_ptr); 11773703b2c5SNicholas Bellinger if (ret < 0) 11783703b2c5SNicholas Bellinger return ret; 11793703b2c5SNicholas Bellinger 11803703b2c5SNicholas Bellinger return count; 11813703b2c5SNicholas Bellinger } 11823703b2c5SNicholas Bellinger 11833703b2c5SNicholas Bellinger TF_TPG_BASE_ATTR(tcm_loop, nexus, S_IRUGO | S_IWUSR); 11843703b2c5SNicholas Bellinger 11853703b2c5SNicholas Bellinger static struct configfs_attribute *tcm_loop_tpg_attrs[] = { 11863703b2c5SNicholas Bellinger &tcm_loop_tpg_nexus.attr, 11873703b2c5SNicholas Bellinger NULL, 11883703b2c5SNicholas Bellinger }; 11893703b2c5SNicholas Bellinger 11903703b2c5SNicholas Bellinger /* Start items for tcm_loop_naa_cit */ 11913703b2c5SNicholas Bellinger 11923703b2c5SNicholas Bellinger struct se_portal_group *tcm_loop_make_naa_tpg( 11933703b2c5SNicholas Bellinger struct se_wwn *wwn, 11943703b2c5SNicholas Bellinger struct config_group *group, 11953703b2c5SNicholas Bellinger const char *name) 11963703b2c5SNicholas Bellinger { 11973703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = container_of(wwn, 11983703b2c5SNicholas Bellinger struct tcm_loop_hba, tl_hba_wwn); 11993703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 12003703b2c5SNicholas Bellinger char *tpgt_str, *end_ptr; 12013703b2c5SNicholas Bellinger int ret; 12023703b2c5SNicholas Bellinger unsigned short int tpgt; 12033703b2c5SNicholas Bellinger 12043703b2c5SNicholas Bellinger tpgt_str = strstr(name, "tpgt_"); 12053703b2c5SNicholas Bellinger if (!tpgt_str) { 12066708bb27SAndy Grover pr_err("Unable to locate \"tpgt_#\" directory" 12073703b2c5SNicholas Bellinger " group\n"); 12083703b2c5SNicholas Bellinger return ERR_PTR(-EINVAL); 12093703b2c5SNicholas Bellinger } 12103703b2c5SNicholas Bellinger tpgt_str += 5; /* Skip ahead of "tpgt_" */ 12113703b2c5SNicholas Bellinger tpgt = (unsigned short int) simple_strtoul(tpgt_str, &end_ptr, 0); 12123703b2c5SNicholas Bellinger 121312f09ccbSDan Carpenter if (tpgt >= TL_TPGS_PER_HBA) { 12146708bb27SAndy Grover pr_err("Passed tpgt: %hu exceeds TL_TPGS_PER_HBA:" 12153703b2c5SNicholas Bellinger " %u\n", tpgt, TL_TPGS_PER_HBA); 12163703b2c5SNicholas Bellinger return ERR_PTR(-EINVAL); 12173703b2c5SNicholas Bellinger } 12183703b2c5SNicholas Bellinger tl_tpg = &tl_hba->tl_hba_tpgs[tpgt]; 12193703b2c5SNicholas Bellinger tl_tpg->tl_hba = tl_hba; 12203703b2c5SNicholas Bellinger tl_tpg->tl_tpgt = tpgt; 12213703b2c5SNicholas Bellinger /* 12223703b2c5SNicholas Bellinger * Register the tl_tpg as a emulated SAS TCM Target Endpoint 12233703b2c5SNicholas Bellinger */ 12243703b2c5SNicholas Bellinger ret = core_tpg_register(&tcm_loop_fabric_configfs->tf_ops, 12255951146dSAndy Grover wwn, &tl_tpg->tl_se_tpg, tl_tpg, 12263703b2c5SNicholas Bellinger TRANSPORT_TPG_TYPE_NORMAL); 12273703b2c5SNicholas Bellinger if (ret < 0) 12283703b2c5SNicholas Bellinger return ERR_PTR(-ENOMEM); 12293703b2c5SNicholas Bellinger 12306708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Allocated Emulated %s" 12313703b2c5SNicholas Bellinger " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba), 12323703b2c5SNicholas Bellinger config_item_name(&wwn->wwn_group.cg_item), tpgt); 12333703b2c5SNicholas Bellinger 12343703b2c5SNicholas Bellinger return &tl_tpg->tl_se_tpg; 12353703b2c5SNicholas Bellinger } 12363703b2c5SNicholas Bellinger 12373703b2c5SNicholas Bellinger void tcm_loop_drop_naa_tpg( 12383703b2c5SNicholas Bellinger struct se_portal_group *se_tpg) 12393703b2c5SNicholas Bellinger { 12403703b2c5SNicholas Bellinger struct se_wwn *wwn = se_tpg->se_tpg_wwn; 12413703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 12423703b2c5SNicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 12433703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 12443703b2c5SNicholas Bellinger unsigned short tpgt; 12453703b2c5SNicholas Bellinger 12463703b2c5SNicholas Bellinger tl_hba = tl_tpg->tl_hba; 12473703b2c5SNicholas Bellinger tpgt = tl_tpg->tl_tpgt; 12483703b2c5SNicholas Bellinger /* 12493703b2c5SNicholas Bellinger * Release the I_T Nexus for the Virtual SAS link if present 12503703b2c5SNicholas Bellinger */ 12513703b2c5SNicholas Bellinger tcm_loop_drop_nexus(tl_tpg); 12523703b2c5SNicholas Bellinger /* 12533703b2c5SNicholas Bellinger * Deregister the tl_tpg as a emulated SAS TCM Target Endpoint 12543703b2c5SNicholas Bellinger */ 12553703b2c5SNicholas Bellinger core_tpg_deregister(se_tpg); 12563703b2c5SNicholas Bellinger 12570a020436SNicholas Bellinger tl_tpg->tl_hba = NULL; 12580a020436SNicholas Bellinger tl_tpg->tl_tpgt = 0; 12590a020436SNicholas Bellinger 12606708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Deallocated Emulated %s" 12613703b2c5SNicholas Bellinger " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba), 12623703b2c5SNicholas Bellinger config_item_name(&wwn->wwn_group.cg_item), tpgt); 12633703b2c5SNicholas Bellinger } 12643703b2c5SNicholas Bellinger 12653703b2c5SNicholas Bellinger /* End items for tcm_loop_naa_cit */ 12663703b2c5SNicholas Bellinger 12673703b2c5SNicholas Bellinger /* Start items for tcm_loop_cit */ 12683703b2c5SNicholas Bellinger 12693703b2c5SNicholas Bellinger struct se_wwn *tcm_loop_make_scsi_hba( 12703703b2c5SNicholas Bellinger struct target_fabric_configfs *tf, 12713703b2c5SNicholas Bellinger struct config_group *group, 12723703b2c5SNicholas Bellinger const char *name) 12733703b2c5SNicholas Bellinger { 12743703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 12753703b2c5SNicholas Bellinger struct Scsi_Host *sh; 12763703b2c5SNicholas Bellinger char *ptr; 12773703b2c5SNicholas Bellinger int ret, off = 0; 12783703b2c5SNicholas Bellinger 12793703b2c5SNicholas Bellinger tl_hba = kzalloc(sizeof(struct tcm_loop_hba), GFP_KERNEL); 12803703b2c5SNicholas Bellinger if (!tl_hba) { 12816708bb27SAndy Grover pr_err("Unable to allocate struct tcm_loop_hba\n"); 12823703b2c5SNicholas Bellinger return ERR_PTR(-ENOMEM); 12833703b2c5SNicholas Bellinger } 12843703b2c5SNicholas Bellinger /* 12853703b2c5SNicholas Bellinger * Determine the emulated Protocol Identifier and Target Port Name 12863703b2c5SNicholas Bellinger * based on the incoming configfs directory name. 12873703b2c5SNicholas Bellinger */ 12883703b2c5SNicholas Bellinger ptr = strstr(name, "naa."); 12893703b2c5SNicholas Bellinger if (ptr) { 12903703b2c5SNicholas Bellinger tl_hba->tl_proto_id = SCSI_PROTOCOL_SAS; 12913703b2c5SNicholas Bellinger goto check_len; 12923703b2c5SNicholas Bellinger } 12933703b2c5SNicholas Bellinger ptr = strstr(name, "fc."); 12943703b2c5SNicholas Bellinger if (ptr) { 12953703b2c5SNicholas Bellinger tl_hba->tl_proto_id = SCSI_PROTOCOL_FCP; 12963703b2c5SNicholas Bellinger off = 3; /* Skip over "fc." */ 12973703b2c5SNicholas Bellinger goto check_len; 12983703b2c5SNicholas Bellinger } 12993703b2c5SNicholas Bellinger ptr = strstr(name, "iqn."); 1300a57b5d36SJesper Juhl if (!ptr) { 13016708bb27SAndy Grover pr_err("Unable to locate prefix for emulated Target " 1302a57b5d36SJesper Juhl "Port: %s\n", name); 1303a57b5d36SJesper Juhl ret = -EINVAL; 1304a57b5d36SJesper Juhl goto out; 13053703b2c5SNicholas Bellinger } 1306a57b5d36SJesper Juhl tl_hba->tl_proto_id = SCSI_PROTOCOL_ISCSI; 13073703b2c5SNicholas Bellinger 13083703b2c5SNicholas Bellinger check_len: 130960d645a4SDan Carpenter if (strlen(name) >= TL_WWN_ADDR_LEN) { 13106708bb27SAndy Grover pr_err("Emulated NAA %s Address: %s, exceeds" 13113703b2c5SNicholas Bellinger " max: %d\n", name, tcm_loop_dump_proto_id(tl_hba), 13123703b2c5SNicholas Bellinger TL_WWN_ADDR_LEN); 1313a57b5d36SJesper Juhl ret = -EINVAL; 1314a57b5d36SJesper Juhl goto out; 13153703b2c5SNicholas Bellinger } 13163703b2c5SNicholas Bellinger snprintf(&tl_hba->tl_wwn_address[0], TL_WWN_ADDR_LEN, "%s", &name[off]); 13173703b2c5SNicholas Bellinger 13183703b2c5SNicholas Bellinger /* 13193703b2c5SNicholas Bellinger * Call device_register(tl_hba->dev) to register the emulated 13203703b2c5SNicholas Bellinger * Linux/SCSI LLD of type struct Scsi_Host at tl_hba->sh after 13213703b2c5SNicholas Bellinger * device_register() callbacks in tcm_loop_driver_probe() 13223703b2c5SNicholas Bellinger */ 13233703b2c5SNicholas Bellinger ret = tcm_loop_setup_hba_bus(tl_hba, tcm_loop_hba_no_cnt); 13243703b2c5SNicholas Bellinger if (ret) 13253703b2c5SNicholas Bellinger goto out; 13263703b2c5SNicholas Bellinger 13273703b2c5SNicholas Bellinger sh = tl_hba->sh; 13283703b2c5SNicholas Bellinger tcm_loop_hba_no_cnt++; 13296708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Allocated emulated Target" 13303703b2c5SNicholas Bellinger " %s Address: %s at Linux/SCSI Host ID: %d\n", 13313703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba), name, sh->host_no); 13323703b2c5SNicholas Bellinger 13333703b2c5SNicholas Bellinger return &tl_hba->tl_hba_wwn; 13343703b2c5SNicholas Bellinger out: 13353703b2c5SNicholas Bellinger kfree(tl_hba); 13363703b2c5SNicholas Bellinger return ERR_PTR(ret); 13373703b2c5SNicholas Bellinger } 13383703b2c5SNicholas Bellinger 13393703b2c5SNicholas Bellinger void tcm_loop_drop_scsi_hba( 13403703b2c5SNicholas Bellinger struct se_wwn *wwn) 13413703b2c5SNicholas Bellinger { 13423703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = container_of(wwn, 13433703b2c5SNicholas Bellinger struct tcm_loop_hba, tl_hba_wwn); 13443703b2c5SNicholas Bellinger int host_no = tl_hba->sh->host_no; 13453703b2c5SNicholas Bellinger /* 13463703b2c5SNicholas Bellinger * Call device_unregister() on the original tl_hba->dev. 13473703b2c5SNicholas Bellinger * tcm_loop_fabric_scsi.c:tcm_loop_release_adapter() will 13483703b2c5SNicholas Bellinger * release *tl_hba; 13493703b2c5SNicholas Bellinger */ 13503703b2c5SNicholas Bellinger device_unregister(&tl_hba->dev); 13513703b2c5SNicholas Bellinger 13526708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Deallocated emulated Target" 13533703b2c5SNicholas Bellinger " SAS Address: %s at Linux/SCSI Host ID: %d\n", 13543703b2c5SNicholas Bellinger config_item_name(&wwn->wwn_group.cg_item), host_no); 13553703b2c5SNicholas Bellinger } 13563703b2c5SNicholas Bellinger 13573703b2c5SNicholas Bellinger /* Start items for tcm_loop_cit */ 13583703b2c5SNicholas Bellinger static ssize_t tcm_loop_wwn_show_attr_version( 13593703b2c5SNicholas Bellinger struct target_fabric_configfs *tf, 13603703b2c5SNicholas Bellinger char *page) 13613703b2c5SNicholas Bellinger { 13623703b2c5SNicholas Bellinger return sprintf(page, "TCM Loopback Fabric module %s\n", TCM_LOOP_VERSION); 13633703b2c5SNicholas Bellinger } 13643703b2c5SNicholas Bellinger 13653703b2c5SNicholas Bellinger TF_WWN_ATTR_RO(tcm_loop, version); 13663703b2c5SNicholas Bellinger 13673703b2c5SNicholas Bellinger static struct configfs_attribute *tcm_loop_wwn_attrs[] = { 13683703b2c5SNicholas Bellinger &tcm_loop_wwn_version.attr, 13693703b2c5SNicholas Bellinger NULL, 13703703b2c5SNicholas Bellinger }; 13713703b2c5SNicholas Bellinger 13723703b2c5SNicholas Bellinger /* End items for tcm_loop_cit */ 13733703b2c5SNicholas Bellinger 13743703b2c5SNicholas Bellinger static int tcm_loop_register_configfs(void) 13753703b2c5SNicholas Bellinger { 13763703b2c5SNicholas Bellinger struct target_fabric_configfs *fabric; 13773703b2c5SNicholas Bellinger struct config_group *tf_cg; 13783703b2c5SNicholas Bellinger int ret; 13793703b2c5SNicholas Bellinger /* 13803703b2c5SNicholas Bellinger * Set the TCM Loop HBA counter to zero 13813703b2c5SNicholas Bellinger */ 13823703b2c5SNicholas Bellinger tcm_loop_hba_no_cnt = 0; 13833703b2c5SNicholas Bellinger /* 13843703b2c5SNicholas Bellinger * Register the top level struct config_item_type with TCM core 13853703b2c5SNicholas Bellinger */ 13863703b2c5SNicholas Bellinger fabric = target_fabric_configfs_init(THIS_MODULE, "loopback"); 1387e3d6f909SAndy Grover if (IS_ERR(fabric)) { 13886708bb27SAndy Grover pr_err("tcm_loop_register_configfs() failed!\n"); 1389e3d6f909SAndy Grover return PTR_ERR(fabric); 13903703b2c5SNicholas Bellinger } 13913703b2c5SNicholas Bellinger /* 13923703b2c5SNicholas Bellinger * Setup the fabric API of function pointers used by target_core_mod 13933703b2c5SNicholas Bellinger */ 13943703b2c5SNicholas Bellinger fabric->tf_ops.get_fabric_name = &tcm_loop_get_fabric_name; 13953703b2c5SNicholas Bellinger fabric->tf_ops.get_fabric_proto_ident = &tcm_loop_get_fabric_proto_ident; 13963703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_wwn = &tcm_loop_get_endpoint_wwn; 13973703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_tag = &tcm_loop_get_tag; 13983703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_default_depth = &tcm_loop_get_default_depth; 13993703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_pr_transport_id = &tcm_loop_get_pr_transport_id; 14003703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_pr_transport_id_len = 14013703b2c5SNicholas Bellinger &tcm_loop_get_pr_transport_id_len; 14023703b2c5SNicholas Bellinger fabric->tf_ops.tpg_parse_pr_out_transport_id = 14033703b2c5SNicholas Bellinger &tcm_loop_parse_pr_out_transport_id; 14043703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_demo_mode = &tcm_loop_check_demo_mode; 14053703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_demo_mode_cache = 14063703b2c5SNicholas Bellinger &tcm_loop_check_demo_mode_cache; 14073703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_demo_mode_write_protect = 14083703b2c5SNicholas Bellinger &tcm_loop_check_demo_mode_write_protect; 14093703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_prod_mode_write_protect = 14103703b2c5SNicholas Bellinger &tcm_loop_check_prod_mode_write_protect; 14113703b2c5SNicholas Bellinger /* 14123703b2c5SNicholas Bellinger * The TCM loopback fabric module runs in demo-mode to a local 14133703b2c5SNicholas Bellinger * virtual SCSI device, so fabric dependent initator ACLs are 14143703b2c5SNicholas Bellinger * not required. 14153703b2c5SNicholas Bellinger */ 14163703b2c5SNicholas Bellinger fabric->tf_ops.tpg_alloc_fabric_acl = &tcm_loop_tpg_alloc_fabric_acl; 14173703b2c5SNicholas Bellinger fabric->tf_ops.tpg_release_fabric_acl = 14183703b2c5SNicholas Bellinger &tcm_loop_tpg_release_fabric_acl; 14193703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_inst_index = &tcm_loop_get_inst_index; 14203703b2c5SNicholas Bellinger /* 14213703b2c5SNicholas Bellinger * Used for setting up remaining TCM resources in process context 14223703b2c5SNicholas Bellinger */ 14233703b2c5SNicholas Bellinger fabric->tf_ops.new_cmd_map = &tcm_loop_new_cmd_map; 14243703b2c5SNicholas Bellinger fabric->tf_ops.check_stop_free = &tcm_loop_check_stop_free; 142535462975SChristoph Hellwig fabric->tf_ops.release_cmd = &tcm_loop_release_cmd; 14263703b2c5SNicholas Bellinger fabric->tf_ops.shutdown_session = &tcm_loop_shutdown_session; 14273703b2c5SNicholas Bellinger fabric->tf_ops.close_session = &tcm_loop_close_session; 14283703b2c5SNicholas Bellinger fabric->tf_ops.stop_session = &tcm_loop_stop_session; 14293703b2c5SNicholas Bellinger fabric->tf_ops.fall_back_to_erl0 = &tcm_loop_fall_back_to_erl0; 14303703b2c5SNicholas Bellinger fabric->tf_ops.sess_logged_in = &tcm_loop_sess_logged_in; 14313703b2c5SNicholas Bellinger fabric->tf_ops.sess_get_index = &tcm_loop_sess_get_index; 14323703b2c5SNicholas Bellinger fabric->tf_ops.sess_get_initiator_sid = NULL; 14333703b2c5SNicholas Bellinger fabric->tf_ops.write_pending = &tcm_loop_write_pending; 14343703b2c5SNicholas Bellinger fabric->tf_ops.write_pending_status = &tcm_loop_write_pending_status; 14353703b2c5SNicholas Bellinger /* 14363703b2c5SNicholas Bellinger * Not used for TCM loopback 14373703b2c5SNicholas Bellinger */ 14383703b2c5SNicholas Bellinger fabric->tf_ops.set_default_node_attributes = 14393703b2c5SNicholas Bellinger &tcm_loop_set_default_node_attributes; 14403703b2c5SNicholas Bellinger fabric->tf_ops.get_task_tag = &tcm_loop_get_task_tag; 14413703b2c5SNicholas Bellinger fabric->tf_ops.get_cmd_state = &tcm_loop_get_cmd_state; 14423703b2c5SNicholas Bellinger fabric->tf_ops.queue_data_in = &tcm_loop_queue_data_in; 14433703b2c5SNicholas Bellinger fabric->tf_ops.queue_status = &tcm_loop_queue_status; 14443703b2c5SNicholas Bellinger fabric->tf_ops.queue_tm_rsp = &tcm_loop_queue_tm_rsp; 14453703b2c5SNicholas Bellinger fabric->tf_ops.set_fabric_sense_len = &tcm_loop_set_fabric_sense_len; 14463703b2c5SNicholas Bellinger fabric->tf_ops.get_fabric_sense_len = &tcm_loop_get_fabric_sense_len; 14473703b2c5SNicholas Bellinger fabric->tf_ops.is_state_remove = &tcm_loop_is_state_remove; 14483703b2c5SNicholas Bellinger 14493703b2c5SNicholas Bellinger tf_cg = &fabric->tf_group; 14503703b2c5SNicholas Bellinger /* 14513703b2c5SNicholas Bellinger * Setup function pointers for generic logic in target_core_fabric_configfs.c 14523703b2c5SNicholas Bellinger */ 14533703b2c5SNicholas Bellinger fabric->tf_ops.fabric_make_wwn = &tcm_loop_make_scsi_hba; 14543703b2c5SNicholas Bellinger fabric->tf_ops.fabric_drop_wwn = &tcm_loop_drop_scsi_hba; 14553703b2c5SNicholas Bellinger fabric->tf_ops.fabric_make_tpg = &tcm_loop_make_naa_tpg; 14563703b2c5SNicholas Bellinger fabric->tf_ops.fabric_drop_tpg = &tcm_loop_drop_naa_tpg; 14573703b2c5SNicholas Bellinger /* 14583703b2c5SNicholas Bellinger * fabric_post_link() and fabric_pre_unlink() are used for 14593703b2c5SNicholas Bellinger * registration and release of TCM Loop Virtual SCSI LUNs. 14603703b2c5SNicholas Bellinger */ 14613703b2c5SNicholas Bellinger fabric->tf_ops.fabric_post_link = &tcm_loop_port_link; 14623703b2c5SNicholas Bellinger fabric->tf_ops.fabric_pre_unlink = &tcm_loop_port_unlink; 14633703b2c5SNicholas Bellinger fabric->tf_ops.fabric_make_np = NULL; 14643703b2c5SNicholas Bellinger fabric->tf_ops.fabric_drop_np = NULL; 14653703b2c5SNicholas Bellinger /* 14663703b2c5SNicholas Bellinger * Setup default attribute lists for various fabric->tf_cit_tmpl 14673703b2c5SNicholas Bellinger */ 14683703b2c5SNicholas Bellinger TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = tcm_loop_wwn_attrs; 14693703b2c5SNicholas Bellinger TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = tcm_loop_tpg_attrs; 14703703b2c5SNicholas Bellinger TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL; 14713703b2c5SNicholas Bellinger TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL; 14723703b2c5SNicholas Bellinger TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL; 14733703b2c5SNicholas Bellinger /* 14743703b2c5SNicholas Bellinger * Once fabric->tf_ops has been setup, now register the fabric for 14753703b2c5SNicholas Bellinger * use within TCM 14763703b2c5SNicholas Bellinger */ 14773703b2c5SNicholas Bellinger ret = target_fabric_configfs_register(fabric); 14783703b2c5SNicholas Bellinger if (ret < 0) { 14796708bb27SAndy Grover pr_err("target_fabric_configfs_register() for" 14803703b2c5SNicholas Bellinger " TCM_Loop failed!\n"); 14813703b2c5SNicholas Bellinger target_fabric_configfs_free(fabric); 14823703b2c5SNicholas Bellinger return -1; 14833703b2c5SNicholas Bellinger } 14843703b2c5SNicholas Bellinger /* 14853703b2c5SNicholas Bellinger * Setup our local pointer to *fabric. 14863703b2c5SNicholas Bellinger */ 14873703b2c5SNicholas Bellinger tcm_loop_fabric_configfs = fabric; 14886708bb27SAndy Grover pr_debug("TCM_LOOP[0] - Set fabric ->" 14893703b2c5SNicholas Bellinger " tcm_loop_fabric_configfs\n"); 14903703b2c5SNicholas Bellinger return 0; 14913703b2c5SNicholas Bellinger } 14923703b2c5SNicholas Bellinger 14933703b2c5SNicholas Bellinger static void tcm_loop_deregister_configfs(void) 14943703b2c5SNicholas Bellinger { 14953703b2c5SNicholas Bellinger if (!tcm_loop_fabric_configfs) 14963703b2c5SNicholas Bellinger return; 14973703b2c5SNicholas Bellinger 14983703b2c5SNicholas Bellinger target_fabric_configfs_deregister(tcm_loop_fabric_configfs); 14993703b2c5SNicholas Bellinger tcm_loop_fabric_configfs = NULL; 15006708bb27SAndy Grover pr_debug("TCM_LOOP[0] - Cleared" 15013703b2c5SNicholas Bellinger " tcm_loop_fabric_configfs\n"); 15023703b2c5SNicholas Bellinger } 15033703b2c5SNicholas Bellinger 15043703b2c5SNicholas Bellinger static int __init tcm_loop_fabric_init(void) 15053703b2c5SNicholas Bellinger { 15063703b2c5SNicholas Bellinger int ret; 15073703b2c5SNicholas Bellinger 15083703b2c5SNicholas Bellinger tcm_loop_cmd_cache = kmem_cache_create("tcm_loop_cmd_cache", 15093703b2c5SNicholas Bellinger sizeof(struct tcm_loop_cmd), 15103703b2c5SNicholas Bellinger __alignof__(struct tcm_loop_cmd), 15113703b2c5SNicholas Bellinger 0, NULL); 15123703b2c5SNicholas Bellinger if (!tcm_loop_cmd_cache) { 15136708bb27SAndy Grover pr_debug("kmem_cache_create() for" 15143703b2c5SNicholas Bellinger " tcm_loop_cmd_cache failed\n"); 15153703b2c5SNicholas Bellinger return -ENOMEM; 15163703b2c5SNicholas Bellinger } 15173703b2c5SNicholas Bellinger 15183703b2c5SNicholas Bellinger ret = tcm_loop_alloc_core_bus(); 15193703b2c5SNicholas Bellinger if (ret) 15203703b2c5SNicholas Bellinger return ret; 15213703b2c5SNicholas Bellinger 15223703b2c5SNicholas Bellinger ret = tcm_loop_register_configfs(); 15233703b2c5SNicholas Bellinger if (ret) { 15243703b2c5SNicholas Bellinger tcm_loop_release_core_bus(); 15253703b2c5SNicholas Bellinger return ret; 15263703b2c5SNicholas Bellinger } 15273703b2c5SNicholas Bellinger 15283703b2c5SNicholas Bellinger return 0; 15293703b2c5SNicholas Bellinger } 15303703b2c5SNicholas Bellinger 15313703b2c5SNicholas Bellinger static void __exit tcm_loop_fabric_exit(void) 15323703b2c5SNicholas Bellinger { 15333703b2c5SNicholas Bellinger tcm_loop_deregister_configfs(); 15343703b2c5SNicholas Bellinger tcm_loop_release_core_bus(); 15353703b2c5SNicholas Bellinger kmem_cache_destroy(tcm_loop_cmd_cache); 15363703b2c5SNicholas Bellinger } 15373703b2c5SNicholas Bellinger 15383703b2c5SNicholas Bellinger MODULE_DESCRIPTION("TCM loopback virtual Linux/SCSI fabric module"); 15393703b2c5SNicholas Bellinger MODULE_AUTHOR("Nicholas A. Bellinger <nab@risingtidesystems.com>"); 15403703b2c5SNicholas Bellinger MODULE_LICENSE("GPL"); 15413703b2c5SNicholas Bellinger module_init(tcm_loop_fabric_init); 15423703b2c5SNicholas Bellinger module_exit(tcm_loop_fabric_exit); 1543