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> 3461db1802SNicholas Bellinger #include <scsi/scsi_tcq.h> 353703b2c5SNicholas Bellinger 363703b2c5SNicholas Bellinger #include <target/target_core_base.h> 373703b2c5SNicholas Bellinger #include <target/target_core_transport.h> 383703b2c5SNicholas Bellinger #include <target/target_core_fabric_ops.h> 393703b2c5SNicholas Bellinger #include <target/target_core_fabric_configfs.h> 403703b2c5SNicholas Bellinger #include <target/target_core_fabric_lib.h> 413703b2c5SNicholas Bellinger #include <target/target_core_configfs.h> 423703b2c5SNicholas Bellinger #include <target/target_core_device.h> 433703b2c5SNicholas Bellinger #include <target/target_core_tpg.h> 443703b2c5SNicholas Bellinger #include <target/target_core_tmr.h> 453703b2c5SNicholas Bellinger 463703b2c5SNicholas Bellinger #include "tcm_loop.h" 473703b2c5SNicholas Bellinger 483703b2c5SNicholas Bellinger #define to_tcm_loop_hba(hba) container_of(hba, struct tcm_loop_hba, dev) 493703b2c5SNicholas Bellinger 503703b2c5SNicholas Bellinger /* Local pointer to allocated TCM configfs fabric module */ 513703b2c5SNicholas Bellinger static struct target_fabric_configfs *tcm_loop_fabric_configfs; 523703b2c5SNicholas Bellinger 533703b2c5SNicholas Bellinger static struct kmem_cache *tcm_loop_cmd_cache; 543703b2c5SNicholas Bellinger 553703b2c5SNicholas Bellinger static int tcm_loop_hba_no_cnt; 563703b2c5SNicholas Bellinger 573703b2c5SNicholas Bellinger /* 583703b2c5SNicholas Bellinger * Allocate a tcm_loop cmd descriptor from target_core_mod code 593703b2c5SNicholas Bellinger * 603703b2c5SNicholas Bellinger * Can be called from interrupt context in tcm_loop_queuecommand() below 613703b2c5SNicholas Bellinger */ 623703b2c5SNicholas Bellinger static struct se_cmd *tcm_loop_allocate_core_cmd( 633703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba, 643703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 653703b2c5SNicholas Bellinger struct scsi_cmnd *sc) 663703b2c5SNicholas Bellinger { 673703b2c5SNicholas Bellinger struct se_cmd *se_cmd; 683703b2c5SNicholas Bellinger struct se_session *se_sess; 693703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus = tl_hba->tl_nexus; 703703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd; 713703b2c5SNicholas Bellinger int sam_task_attr; 723703b2c5SNicholas Bellinger 733703b2c5SNicholas Bellinger if (!tl_nexus) { 743703b2c5SNicholas Bellinger scmd_printk(KERN_ERR, sc, "TCM_Loop I_T Nexus" 753703b2c5SNicholas Bellinger " does not exist\n"); 763703b2c5SNicholas Bellinger set_host_byte(sc, DID_ERROR); 773703b2c5SNicholas Bellinger return NULL; 783703b2c5SNicholas Bellinger } 793703b2c5SNicholas Bellinger se_sess = tl_nexus->se_sess; 803703b2c5SNicholas Bellinger 813703b2c5SNicholas Bellinger tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_ATOMIC); 823703b2c5SNicholas Bellinger if (!tl_cmd) { 833703b2c5SNicholas Bellinger printk(KERN_ERR "Unable to allocate struct tcm_loop_cmd\n"); 843703b2c5SNicholas Bellinger set_host_byte(sc, DID_ERROR); 853703b2c5SNicholas Bellinger return NULL; 863703b2c5SNicholas Bellinger } 873703b2c5SNicholas Bellinger se_cmd = &tl_cmd->tl_se_cmd; 883703b2c5SNicholas Bellinger /* 893703b2c5SNicholas Bellinger * Save the pointer to struct scsi_cmnd *sc 903703b2c5SNicholas Bellinger */ 913703b2c5SNicholas Bellinger tl_cmd->sc = sc; 923703b2c5SNicholas Bellinger /* 933703b2c5SNicholas Bellinger * Locate the SAM Task Attr from struct scsi_cmnd * 943703b2c5SNicholas Bellinger */ 953703b2c5SNicholas Bellinger if (sc->device->tagged_supported) { 963703b2c5SNicholas Bellinger switch (sc->tag) { 973703b2c5SNicholas Bellinger case HEAD_OF_QUEUE_TAG: 9861db1802SNicholas Bellinger sam_task_attr = MSG_HEAD_TAG; 993703b2c5SNicholas Bellinger break; 1003703b2c5SNicholas Bellinger case ORDERED_QUEUE_TAG: 10161db1802SNicholas Bellinger sam_task_attr = MSG_ORDERED_TAG; 1023703b2c5SNicholas Bellinger break; 1033703b2c5SNicholas Bellinger default: 10461db1802SNicholas Bellinger sam_task_attr = MSG_SIMPLE_TAG; 1053703b2c5SNicholas Bellinger break; 1063703b2c5SNicholas Bellinger } 1073703b2c5SNicholas Bellinger } else 10861db1802SNicholas Bellinger sam_task_attr = MSG_SIMPLE_TAG; 1093703b2c5SNicholas Bellinger 1103703b2c5SNicholas Bellinger /* 1113703b2c5SNicholas Bellinger * Initialize struct se_cmd descriptor from target_core_mod infrastructure 1123703b2c5SNicholas Bellinger */ 1133703b2c5SNicholas Bellinger transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 1143703b2c5SNicholas Bellinger scsi_bufflen(sc), sc->sc_data_direction, sam_task_attr, 1153703b2c5SNicholas Bellinger &tl_cmd->tl_sense_buf[0]); 1163703b2c5SNicholas Bellinger 1173703b2c5SNicholas Bellinger /* 1183703b2c5SNicholas Bellinger * Signal BIDI usage with T_TASK(cmd)->t_tasks_bidi 1193703b2c5SNicholas Bellinger */ 1203703b2c5SNicholas Bellinger if (scsi_bidi_cmnd(sc)) 1213703b2c5SNicholas Bellinger T_TASK(se_cmd)->t_tasks_bidi = 1; 1223703b2c5SNicholas Bellinger /* 1233703b2c5SNicholas Bellinger * Locate the struct se_lun pointer and attach it to struct se_cmd 1243703b2c5SNicholas Bellinger */ 125efa4988dSNicholas Bellinger if (transport_get_lun_for_cmd(se_cmd, tl_cmd->sc->device->lun) < 0) { 1263703b2c5SNicholas Bellinger kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); 1273703b2c5SNicholas Bellinger set_host_byte(sc, DID_NO_CONNECT); 1283703b2c5SNicholas Bellinger return NULL; 1293703b2c5SNicholas Bellinger } 1303703b2c5SNicholas Bellinger 1313703b2c5SNicholas Bellinger transport_device_setup_cmd(se_cmd); 1323703b2c5SNicholas Bellinger return se_cmd; 1333703b2c5SNicholas Bellinger } 1343703b2c5SNicholas Bellinger 1353703b2c5SNicholas Bellinger /* 1363703b2c5SNicholas Bellinger * Called by struct target_core_fabric_ops->new_cmd_map() 1373703b2c5SNicholas Bellinger * 1383703b2c5SNicholas Bellinger * Always called in process context. A non zero return value 1393703b2c5SNicholas Bellinger * here will signal to handle an exception based on the return code. 1403703b2c5SNicholas Bellinger */ 1413703b2c5SNicholas Bellinger static int tcm_loop_new_cmd_map(struct se_cmd *se_cmd) 1423703b2c5SNicholas Bellinger { 1433703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 1443703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 1453703b2c5SNicholas Bellinger struct scsi_cmnd *sc = tl_cmd->sc; 1463703b2c5SNicholas Bellinger void *mem_ptr, *mem_bidi_ptr = NULL; 1473703b2c5SNicholas Bellinger u32 sg_no_bidi = 0; 1483703b2c5SNicholas Bellinger int ret; 1493703b2c5SNicholas Bellinger /* 1503703b2c5SNicholas Bellinger * Allocate the necessary tasks to complete the received CDB+data 1513703b2c5SNicholas Bellinger */ 1523703b2c5SNicholas Bellinger ret = transport_generic_allocate_tasks(se_cmd, tl_cmd->sc->cmnd); 1533703b2c5SNicholas Bellinger if (ret == -1) { 1543703b2c5SNicholas Bellinger /* Out of Resources */ 1553703b2c5SNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 1563703b2c5SNicholas Bellinger } else if (ret == -2) { 1573703b2c5SNicholas Bellinger /* 1583703b2c5SNicholas Bellinger * Handle case for SAM_STAT_RESERVATION_CONFLICT 1593703b2c5SNicholas Bellinger */ 1603703b2c5SNicholas Bellinger if (se_cmd->se_cmd_flags & SCF_SCSI_RESERVATION_CONFLICT) 1613703b2c5SNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 1623703b2c5SNicholas Bellinger /* 1633703b2c5SNicholas Bellinger * Otherwise, return SAM_STAT_CHECK_CONDITION and return 1643703b2c5SNicholas Bellinger * sense data. 1653703b2c5SNicholas Bellinger */ 1663703b2c5SNicholas Bellinger return PYX_TRANSPORT_USE_SENSE_REASON; 1673703b2c5SNicholas Bellinger } 1683703b2c5SNicholas Bellinger /* 1693703b2c5SNicholas Bellinger * Setup the struct scatterlist memory from the received 1703703b2c5SNicholas Bellinger * struct scsi_cmnd. 1713703b2c5SNicholas Bellinger */ 1723703b2c5SNicholas Bellinger if (scsi_sg_count(sc)) { 1733703b2c5SNicholas Bellinger se_cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM; 1743703b2c5SNicholas Bellinger mem_ptr = (void *)scsi_sglist(sc); 1753703b2c5SNicholas Bellinger /* 1763703b2c5SNicholas Bellinger * For BIDI commands, pass in the extra READ buffer 1773703b2c5SNicholas Bellinger * to transport_generic_map_mem_to_cmd() below.. 1783703b2c5SNicholas Bellinger */ 1793703b2c5SNicholas Bellinger if (T_TASK(se_cmd)->t_tasks_bidi) { 1803703b2c5SNicholas Bellinger struct scsi_data_buffer *sdb = scsi_in(sc); 1813703b2c5SNicholas Bellinger 1823703b2c5SNicholas Bellinger mem_bidi_ptr = (void *)sdb->table.sgl; 1833703b2c5SNicholas Bellinger sg_no_bidi = sdb->table.nents; 1843703b2c5SNicholas Bellinger } 1853703b2c5SNicholas Bellinger } else { 1863703b2c5SNicholas Bellinger /* 1873703b2c5SNicholas Bellinger * Used for DMA_NONE 1883703b2c5SNicholas Bellinger */ 1893703b2c5SNicholas Bellinger mem_ptr = NULL; 1903703b2c5SNicholas Bellinger } 1913703b2c5SNicholas Bellinger /* 1923703b2c5SNicholas Bellinger * Map the SG memory into struct se_mem->page linked list using the same 1933703b2c5SNicholas Bellinger * physical memory at sg->page_link. 1943703b2c5SNicholas Bellinger */ 1953703b2c5SNicholas Bellinger ret = transport_generic_map_mem_to_cmd(se_cmd, mem_ptr, 1963703b2c5SNicholas Bellinger scsi_sg_count(sc), mem_bidi_ptr, sg_no_bidi); 1973703b2c5SNicholas Bellinger if (ret < 0) 1983703b2c5SNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 1993703b2c5SNicholas Bellinger 2003703b2c5SNicholas Bellinger return 0; 2013703b2c5SNicholas Bellinger } 2023703b2c5SNicholas Bellinger 2033703b2c5SNicholas Bellinger /* 2043703b2c5SNicholas Bellinger * Called from struct target_core_fabric_ops->check_stop_free() 2053703b2c5SNicholas Bellinger */ 2063703b2c5SNicholas Bellinger static void tcm_loop_check_stop_free(struct se_cmd *se_cmd) 2073703b2c5SNicholas Bellinger { 2083703b2c5SNicholas Bellinger /* 2093703b2c5SNicholas Bellinger * Do not release struct se_cmd's containing a valid TMR 2103703b2c5SNicholas Bellinger * pointer. These will be released directly in tcm_loop_device_reset() 2113703b2c5SNicholas Bellinger * with transport_generic_free_cmd(). 2123703b2c5SNicholas Bellinger */ 2133703b2c5SNicholas Bellinger if (se_cmd->se_tmr_req) 2143703b2c5SNicholas Bellinger return; 2153703b2c5SNicholas Bellinger /* 2163703b2c5SNicholas Bellinger * Release the struct se_cmd, which will make a callback to release 2173703b2c5SNicholas Bellinger * struct tcm_loop_cmd * in tcm_loop_deallocate_core_cmd() 2183703b2c5SNicholas Bellinger */ 2193703b2c5SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0, 1, 0); 2203703b2c5SNicholas Bellinger } 2213703b2c5SNicholas Bellinger 2223703b2c5SNicholas Bellinger /* 2233703b2c5SNicholas Bellinger * Called from struct target_core_fabric_ops->release_cmd_to_pool() 2243703b2c5SNicholas Bellinger */ 2253703b2c5SNicholas Bellinger static void tcm_loop_deallocate_core_cmd(struct se_cmd *se_cmd) 2263703b2c5SNicholas Bellinger { 2273703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 2283703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 2293703b2c5SNicholas Bellinger 2303703b2c5SNicholas Bellinger kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); 2313703b2c5SNicholas Bellinger } 2323703b2c5SNicholas Bellinger 2333703b2c5SNicholas Bellinger static int tcm_loop_proc_info(struct Scsi_Host *host, char *buffer, 2343703b2c5SNicholas Bellinger char **start, off_t offset, 2353703b2c5SNicholas Bellinger int length, int inout) 2363703b2c5SNicholas Bellinger { 2373703b2c5SNicholas Bellinger return sprintf(buffer, "tcm_loop_proc_info()\n"); 2383703b2c5SNicholas Bellinger } 2393703b2c5SNicholas Bellinger 2403703b2c5SNicholas Bellinger static int tcm_loop_driver_probe(struct device *); 2413703b2c5SNicholas Bellinger static int tcm_loop_driver_remove(struct device *); 2423703b2c5SNicholas Bellinger 2433703b2c5SNicholas Bellinger static int pseudo_lld_bus_match(struct device *dev, 2443703b2c5SNicholas Bellinger struct device_driver *dev_driver) 2453703b2c5SNicholas Bellinger { 2463703b2c5SNicholas Bellinger return 1; 2473703b2c5SNicholas Bellinger } 2483703b2c5SNicholas Bellinger 2493703b2c5SNicholas Bellinger static struct bus_type tcm_loop_lld_bus = { 2503703b2c5SNicholas Bellinger .name = "tcm_loop_bus", 2513703b2c5SNicholas Bellinger .match = pseudo_lld_bus_match, 2523703b2c5SNicholas Bellinger .probe = tcm_loop_driver_probe, 2533703b2c5SNicholas Bellinger .remove = tcm_loop_driver_remove, 2543703b2c5SNicholas Bellinger }; 2553703b2c5SNicholas Bellinger 2563703b2c5SNicholas Bellinger static struct device_driver tcm_loop_driverfs = { 2573703b2c5SNicholas Bellinger .name = "tcm_loop", 2583703b2c5SNicholas Bellinger .bus = &tcm_loop_lld_bus, 2593703b2c5SNicholas Bellinger }; 2603703b2c5SNicholas Bellinger /* 2613703b2c5SNicholas Bellinger * Used with root_device_register() in tcm_loop_alloc_core_bus() below 2623703b2c5SNicholas Bellinger */ 2633703b2c5SNicholas Bellinger struct device *tcm_loop_primary; 2643703b2c5SNicholas Bellinger 2653703b2c5SNicholas Bellinger /* 2663703b2c5SNicholas Bellinger * Copied from drivers/scsi/libfc/fc_fcp.c:fc_change_queue_depth() and 2673703b2c5SNicholas Bellinger * drivers/scsi/libiscsi.c:iscsi_change_queue_depth() 2683703b2c5SNicholas Bellinger */ 2693703b2c5SNicholas Bellinger static int tcm_loop_change_queue_depth( 2703703b2c5SNicholas Bellinger struct scsi_device *sdev, 2713703b2c5SNicholas Bellinger int depth, 2723703b2c5SNicholas Bellinger int reason) 2733703b2c5SNicholas Bellinger { 2743703b2c5SNicholas Bellinger switch (reason) { 2753703b2c5SNicholas Bellinger case SCSI_QDEPTH_DEFAULT: 2763703b2c5SNicholas Bellinger scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); 2773703b2c5SNicholas Bellinger break; 2783703b2c5SNicholas Bellinger case SCSI_QDEPTH_QFULL: 2793703b2c5SNicholas Bellinger scsi_track_queue_full(sdev, depth); 2803703b2c5SNicholas Bellinger break; 2813703b2c5SNicholas Bellinger case SCSI_QDEPTH_RAMP_UP: 2823703b2c5SNicholas Bellinger scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); 2833703b2c5SNicholas Bellinger break; 2843703b2c5SNicholas Bellinger default: 2853703b2c5SNicholas Bellinger return -EOPNOTSUPP; 2863703b2c5SNicholas Bellinger } 2873703b2c5SNicholas Bellinger return sdev->queue_depth; 2883703b2c5SNicholas Bellinger } 2893703b2c5SNicholas Bellinger 2903703b2c5SNicholas Bellinger /* 2913703b2c5SNicholas Bellinger * Main entry point from struct scsi_host_template for incoming SCSI CDB+Data 2923703b2c5SNicholas Bellinger * from Linux/SCSI subsystem for SCSI low level device drivers (LLDs) 2933703b2c5SNicholas Bellinger */ 2943703b2c5SNicholas Bellinger static int tcm_loop_queuecommand( 2953703b2c5SNicholas Bellinger struct Scsi_Host *sh, 2963703b2c5SNicholas Bellinger struct scsi_cmnd *sc) 2973703b2c5SNicholas Bellinger { 2983703b2c5SNicholas Bellinger struct se_cmd *se_cmd; 2993703b2c5SNicholas Bellinger struct se_portal_group *se_tpg; 3003703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 3013703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 3023703b2c5SNicholas Bellinger 3033703b2c5SNicholas Bellinger TL_CDB_DEBUG("tcm_loop_queuecommand() %d:%d:%d:%d got CDB: 0x%02x" 3043703b2c5SNicholas Bellinger " scsi_buf_len: %u\n", sc->device->host->host_no, 3053703b2c5SNicholas Bellinger sc->device->id, sc->device->channel, sc->device->lun, 3063703b2c5SNicholas Bellinger sc->cmnd[0], scsi_bufflen(sc)); 3073703b2c5SNicholas Bellinger /* 3083703b2c5SNicholas Bellinger * Locate the tcm_loop_hba_t pointer 3093703b2c5SNicholas Bellinger */ 3103703b2c5SNicholas Bellinger tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); 3113703b2c5SNicholas Bellinger tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; 3123703b2c5SNicholas Bellinger se_tpg = &tl_tpg->tl_se_tpg; 3133703b2c5SNicholas Bellinger /* 3143703b2c5SNicholas Bellinger * Determine the SAM Task Attribute and allocate tl_cmd and 3153703b2c5SNicholas Bellinger * tl_cmd->tl_se_cmd from TCM infrastructure 3163703b2c5SNicholas Bellinger */ 3173703b2c5SNicholas Bellinger se_cmd = tcm_loop_allocate_core_cmd(tl_hba, se_tpg, sc); 3183703b2c5SNicholas Bellinger if (!se_cmd) { 3193703b2c5SNicholas Bellinger sc->scsi_done(sc); 3203703b2c5SNicholas Bellinger return 0; 3213703b2c5SNicholas Bellinger } 3223703b2c5SNicholas Bellinger /* 3233703b2c5SNicholas Bellinger * Queue up the newly allocated to be processed in TCM thread context. 3243703b2c5SNicholas Bellinger */ 3253703b2c5SNicholas Bellinger transport_generic_handle_cdb_map(se_cmd); 3263703b2c5SNicholas Bellinger return 0; 3273703b2c5SNicholas Bellinger } 3283703b2c5SNicholas Bellinger 3293703b2c5SNicholas Bellinger /* 3303703b2c5SNicholas Bellinger * Called from SCSI EH process context to issue a LUN_RESET TMR 3313703b2c5SNicholas Bellinger * to struct scsi_device 3323703b2c5SNicholas Bellinger */ 3333703b2c5SNicholas Bellinger static int tcm_loop_device_reset(struct scsi_cmnd *sc) 3343703b2c5SNicholas Bellinger { 3353703b2c5SNicholas Bellinger struct se_cmd *se_cmd = NULL; 3363703b2c5SNicholas Bellinger struct se_portal_group *se_tpg; 3373703b2c5SNicholas Bellinger struct se_session *se_sess; 3383703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = NULL; 3393703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 3403703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus; 3413703b2c5SNicholas Bellinger struct tcm_loop_tmr *tl_tmr = NULL; 3423703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 3433703b2c5SNicholas Bellinger int ret = FAILED; 3443703b2c5SNicholas Bellinger /* 3453703b2c5SNicholas Bellinger * Locate the tcm_loop_hba_t pointer 3463703b2c5SNicholas Bellinger */ 3473703b2c5SNicholas Bellinger tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); 3483703b2c5SNicholas Bellinger /* 3493703b2c5SNicholas Bellinger * Locate the tl_nexus and se_sess pointers 3503703b2c5SNicholas Bellinger */ 3513703b2c5SNicholas Bellinger tl_nexus = tl_hba->tl_nexus; 3523703b2c5SNicholas Bellinger if (!tl_nexus) { 3533703b2c5SNicholas Bellinger printk(KERN_ERR "Unable to perform device reset without" 3543703b2c5SNicholas Bellinger " active I_T Nexus\n"); 3553703b2c5SNicholas Bellinger return FAILED; 3563703b2c5SNicholas Bellinger } 3573703b2c5SNicholas Bellinger se_sess = tl_nexus->se_sess; 3583703b2c5SNicholas Bellinger /* 3593703b2c5SNicholas Bellinger * Locate the tl_tpg and se_tpg pointers from TargetID in sc->device->id 3603703b2c5SNicholas Bellinger */ 3613703b2c5SNicholas Bellinger tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; 3623703b2c5SNicholas Bellinger se_tpg = &tl_tpg->tl_se_tpg; 3633703b2c5SNicholas Bellinger 3643703b2c5SNicholas Bellinger tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_KERNEL); 3653703b2c5SNicholas Bellinger if (!tl_cmd) { 3663703b2c5SNicholas Bellinger printk(KERN_ERR "Unable to allocate memory for tl_cmd\n"); 3673703b2c5SNicholas Bellinger return FAILED; 3683703b2c5SNicholas Bellinger } 3693703b2c5SNicholas Bellinger 3703703b2c5SNicholas Bellinger tl_tmr = kzalloc(sizeof(struct tcm_loop_tmr), GFP_KERNEL); 3713703b2c5SNicholas Bellinger if (!tl_tmr) { 3723703b2c5SNicholas Bellinger printk(KERN_ERR "Unable to allocate memory for tl_tmr\n"); 3733703b2c5SNicholas Bellinger goto release; 3743703b2c5SNicholas Bellinger } 3753703b2c5SNicholas Bellinger init_waitqueue_head(&tl_tmr->tl_tmr_wait); 3763703b2c5SNicholas Bellinger 3773703b2c5SNicholas Bellinger se_cmd = &tl_cmd->tl_se_cmd; 3783703b2c5SNicholas Bellinger /* 3793703b2c5SNicholas Bellinger * Initialize struct se_cmd descriptor from target_core_mod infrastructure 3803703b2c5SNicholas Bellinger */ 3813703b2c5SNicholas Bellinger transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 0, 38261db1802SNicholas Bellinger DMA_NONE, MSG_SIMPLE_TAG, 3833703b2c5SNicholas Bellinger &tl_cmd->tl_sense_buf[0]); 3843703b2c5SNicholas Bellinger /* 3853703b2c5SNicholas Bellinger * Allocate the LUN_RESET TMR 3863703b2c5SNicholas Bellinger */ 3873703b2c5SNicholas Bellinger se_cmd->se_tmr_req = core_tmr_alloc_req(se_cmd, (void *)tl_tmr, 3883703b2c5SNicholas Bellinger TMR_LUN_RESET); 389552523dcSDan Carpenter if (IS_ERR(se_cmd->se_tmr_req)) 3903703b2c5SNicholas Bellinger goto release; 3913703b2c5SNicholas Bellinger /* 3923703b2c5SNicholas Bellinger * Locate the underlying TCM struct se_lun from sc->device->lun 3933703b2c5SNicholas Bellinger */ 3943703b2c5SNicholas Bellinger if (transport_get_lun_for_tmr(se_cmd, sc->device->lun) < 0) 3953703b2c5SNicholas Bellinger goto release; 3963703b2c5SNicholas Bellinger /* 3973703b2c5SNicholas Bellinger * Queue the TMR to TCM Core and sleep waiting for tcm_loop_queue_tm_rsp() 3983703b2c5SNicholas Bellinger * to wake us up. 3993703b2c5SNicholas Bellinger */ 4003703b2c5SNicholas Bellinger transport_generic_handle_tmr(se_cmd); 4013703b2c5SNicholas Bellinger wait_event(tl_tmr->tl_tmr_wait, atomic_read(&tl_tmr->tmr_complete)); 4023703b2c5SNicholas Bellinger /* 4033703b2c5SNicholas Bellinger * The TMR LUN_RESET has completed, check the response status and 4043703b2c5SNicholas Bellinger * then release allocations. 4053703b2c5SNicholas Bellinger */ 4063703b2c5SNicholas Bellinger ret = (se_cmd->se_tmr_req->response == TMR_FUNCTION_COMPLETE) ? 4073703b2c5SNicholas Bellinger SUCCESS : FAILED; 4083703b2c5SNicholas Bellinger release: 4093703b2c5SNicholas Bellinger if (se_cmd) 4103703b2c5SNicholas Bellinger transport_generic_free_cmd(se_cmd, 1, 1, 0); 4113703b2c5SNicholas Bellinger else 4123703b2c5SNicholas Bellinger kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); 4133703b2c5SNicholas Bellinger kfree(tl_tmr); 4143703b2c5SNicholas Bellinger return ret; 4153703b2c5SNicholas Bellinger } 4163703b2c5SNicholas Bellinger 4173703b2c5SNicholas Bellinger static int tcm_loop_slave_alloc(struct scsi_device *sd) 4183703b2c5SNicholas Bellinger { 4193703b2c5SNicholas Bellinger set_bit(QUEUE_FLAG_BIDI, &sd->request_queue->queue_flags); 4203703b2c5SNicholas Bellinger return 0; 4213703b2c5SNicholas Bellinger } 4223703b2c5SNicholas Bellinger 4233703b2c5SNicholas Bellinger static int tcm_loop_slave_configure(struct scsi_device *sd) 4243703b2c5SNicholas Bellinger { 4253703b2c5SNicholas Bellinger return 0; 4263703b2c5SNicholas Bellinger } 4273703b2c5SNicholas Bellinger 4283703b2c5SNicholas Bellinger static struct scsi_host_template tcm_loop_driver_template = { 4293703b2c5SNicholas Bellinger .proc_info = tcm_loop_proc_info, 4303703b2c5SNicholas Bellinger .proc_name = "tcm_loopback", 4313703b2c5SNicholas Bellinger .name = "TCM_Loopback", 4323703b2c5SNicholas Bellinger .queuecommand = tcm_loop_queuecommand, 4333703b2c5SNicholas Bellinger .change_queue_depth = tcm_loop_change_queue_depth, 4343703b2c5SNicholas Bellinger .eh_device_reset_handler = tcm_loop_device_reset, 4353703b2c5SNicholas Bellinger .can_queue = TL_SCSI_CAN_QUEUE, 4363703b2c5SNicholas Bellinger .this_id = -1, 4373703b2c5SNicholas Bellinger .sg_tablesize = TL_SCSI_SG_TABLESIZE, 4383703b2c5SNicholas Bellinger .cmd_per_lun = TL_SCSI_CMD_PER_LUN, 4393703b2c5SNicholas Bellinger .max_sectors = TL_SCSI_MAX_SECTORS, 4403703b2c5SNicholas Bellinger .use_clustering = DISABLE_CLUSTERING, 4413703b2c5SNicholas Bellinger .slave_alloc = tcm_loop_slave_alloc, 4423703b2c5SNicholas Bellinger .slave_configure = tcm_loop_slave_configure, 4433703b2c5SNicholas Bellinger .module = THIS_MODULE, 4443703b2c5SNicholas Bellinger }; 4453703b2c5SNicholas Bellinger 4463703b2c5SNicholas Bellinger static int tcm_loop_driver_probe(struct device *dev) 4473703b2c5SNicholas Bellinger { 4483703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 4493703b2c5SNicholas Bellinger struct Scsi_Host *sh; 4503703b2c5SNicholas Bellinger int error; 4513703b2c5SNicholas Bellinger 4523703b2c5SNicholas Bellinger tl_hba = to_tcm_loop_hba(dev); 4533703b2c5SNicholas Bellinger 4543703b2c5SNicholas Bellinger sh = scsi_host_alloc(&tcm_loop_driver_template, 4553703b2c5SNicholas Bellinger sizeof(struct tcm_loop_hba)); 4563703b2c5SNicholas Bellinger if (!sh) { 4573703b2c5SNicholas Bellinger printk(KERN_ERR "Unable to allocate struct scsi_host\n"); 4583703b2c5SNicholas Bellinger return -ENODEV; 4593703b2c5SNicholas Bellinger } 4603703b2c5SNicholas Bellinger tl_hba->sh = sh; 4613703b2c5SNicholas Bellinger 4623703b2c5SNicholas Bellinger /* 4633703b2c5SNicholas Bellinger * Assign the struct tcm_loop_hba pointer to struct Scsi_Host->hostdata 4643703b2c5SNicholas Bellinger */ 4653703b2c5SNicholas Bellinger *((struct tcm_loop_hba **)sh->hostdata) = tl_hba; 4663703b2c5SNicholas Bellinger /* 4673703b2c5SNicholas Bellinger * Setup single ID, Channel and LUN for now.. 4683703b2c5SNicholas Bellinger */ 4693703b2c5SNicholas Bellinger sh->max_id = 2; 4703703b2c5SNicholas Bellinger sh->max_lun = 0; 4713703b2c5SNicholas Bellinger sh->max_channel = 0; 4723703b2c5SNicholas Bellinger sh->max_cmd_len = TL_SCSI_MAX_CMD_LEN; 4733703b2c5SNicholas Bellinger 4743703b2c5SNicholas Bellinger error = scsi_add_host(sh, &tl_hba->dev); 4753703b2c5SNicholas Bellinger if (error) { 4763703b2c5SNicholas Bellinger printk(KERN_ERR "%s: scsi_add_host failed\n", __func__); 4773703b2c5SNicholas Bellinger scsi_host_put(sh); 4783703b2c5SNicholas Bellinger return -ENODEV; 4793703b2c5SNicholas Bellinger } 4803703b2c5SNicholas Bellinger return 0; 4813703b2c5SNicholas Bellinger } 4823703b2c5SNicholas Bellinger 4833703b2c5SNicholas Bellinger static int tcm_loop_driver_remove(struct device *dev) 4843703b2c5SNicholas Bellinger { 4853703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 4863703b2c5SNicholas Bellinger struct Scsi_Host *sh; 4873703b2c5SNicholas Bellinger 4883703b2c5SNicholas Bellinger tl_hba = to_tcm_loop_hba(dev); 4893703b2c5SNicholas Bellinger sh = tl_hba->sh; 4903703b2c5SNicholas Bellinger 4913703b2c5SNicholas Bellinger scsi_remove_host(sh); 4923703b2c5SNicholas Bellinger scsi_host_put(sh); 4933703b2c5SNicholas Bellinger return 0; 4943703b2c5SNicholas Bellinger } 4953703b2c5SNicholas Bellinger 4963703b2c5SNicholas Bellinger static void tcm_loop_release_adapter(struct device *dev) 4973703b2c5SNicholas Bellinger { 4983703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = to_tcm_loop_hba(dev); 4993703b2c5SNicholas Bellinger 5003703b2c5SNicholas Bellinger kfree(tl_hba); 5013703b2c5SNicholas Bellinger } 5023703b2c5SNicholas Bellinger 5033703b2c5SNicholas Bellinger /* 5043703b2c5SNicholas Bellinger * Called from tcm_loop_make_scsi_hba() in tcm_loop_configfs.c 5053703b2c5SNicholas Bellinger */ 5063703b2c5SNicholas Bellinger static int tcm_loop_setup_hba_bus(struct tcm_loop_hba *tl_hba, int tcm_loop_host_id) 5073703b2c5SNicholas Bellinger { 5083703b2c5SNicholas Bellinger int ret; 5093703b2c5SNicholas Bellinger 5103703b2c5SNicholas Bellinger tl_hba->dev.bus = &tcm_loop_lld_bus; 5113703b2c5SNicholas Bellinger tl_hba->dev.parent = tcm_loop_primary; 5123703b2c5SNicholas Bellinger tl_hba->dev.release = &tcm_loop_release_adapter; 5133703b2c5SNicholas Bellinger dev_set_name(&tl_hba->dev, "tcm_loop_adapter_%d", tcm_loop_host_id); 5143703b2c5SNicholas Bellinger 5153703b2c5SNicholas Bellinger ret = device_register(&tl_hba->dev); 5163703b2c5SNicholas Bellinger if (ret) { 5173703b2c5SNicholas Bellinger printk(KERN_ERR "device_register() failed for" 5183703b2c5SNicholas Bellinger " tl_hba->dev: %d\n", ret); 5193703b2c5SNicholas Bellinger return -ENODEV; 5203703b2c5SNicholas Bellinger } 5213703b2c5SNicholas Bellinger 5223703b2c5SNicholas Bellinger return 0; 5233703b2c5SNicholas Bellinger } 5243703b2c5SNicholas Bellinger 5253703b2c5SNicholas Bellinger /* 5263703b2c5SNicholas Bellinger * Called from tcm_loop_fabric_init() in tcl_loop_fabric.c to load the emulated 5273703b2c5SNicholas Bellinger * tcm_loop SCSI bus. 5283703b2c5SNicholas Bellinger */ 5293703b2c5SNicholas Bellinger static int tcm_loop_alloc_core_bus(void) 5303703b2c5SNicholas Bellinger { 5313703b2c5SNicholas Bellinger int ret; 5323703b2c5SNicholas Bellinger 5333703b2c5SNicholas Bellinger tcm_loop_primary = root_device_register("tcm_loop_0"); 5343703b2c5SNicholas Bellinger if (IS_ERR(tcm_loop_primary)) { 5353703b2c5SNicholas Bellinger printk(KERN_ERR "Unable to allocate tcm_loop_primary\n"); 5363703b2c5SNicholas Bellinger return PTR_ERR(tcm_loop_primary); 5373703b2c5SNicholas Bellinger } 5383703b2c5SNicholas Bellinger 5393703b2c5SNicholas Bellinger ret = bus_register(&tcm_loop_lld_bus); 5403703b2c5SNicholas Bellinger if (ret) { 5413703b2c5SNicholas Bellinger printk(KERN_ERR "bus_register() failed for tcm_loop_lld_bus\n"); 5423703b2c5SNicholas Bellinger goto dev_unreg; 5433703b2c5SNicholas Bellinger } 5443703b2c5SNicholas Bellinger 5453703b2c5SNicholas Bellinger ret = driver_register(&tcm_loop_driverfs); 5463703b2c5SNicholas Bellinger if (ret) { 5473703b2c5SNicholas Bellinger printk(KERN_ERR "driver_register() failed for" 5483703b2c5SNicholas Bellinger "tcm_loop_driverfs\n"); 5493703b2c5SNicholas Bellinger goto bus_unreg; 5503703b2c5SNicholas Bellinger } 5513703b2c5SNicholas Bellinger 5523703b2c5SNicholas Bellinger printk(KERN_INFO "Initialized TCM Loop Core Bus\n"); 5533703b2c5SNicholas Bellinger return ret; 5543703b2c5SNicholas Bellinger 5553703b2c5SNicholas Bellinger bus_unreg: 5563703b2c5SNicholas Bellinger bus_unregister(&tcm_loop_lld_bus); 5573703b2c5SNicholas Bellinger dev_unreg: 5583703b2c5SNicholas Bellinger root_device_unregister(tcm_loop_primary); 5593703b2c5SNicholas Bellinger return ret; 5603703b2c5SNicholas Bellinger } 5613703b2c5SNicholas Bellinger 5623703b2c5SNicholas Bellinger static void tcm_loop_release_core_bus(void) 5633703b2c5SNicholas Bellinger { 5643703b2c5SNicholas Bellinger driver_unregister(&tcm_loop_driverfs); 5653703b2c5SNicholas Bellinger bus_unregister(&tcm_loop_lld_bus); 5663703b2c5SNicholas Bellinger root_device_unregister(tcm_loop_primary); 5673703b2c5SNicholas Bellinger 5683703b2c5SNicholas Bellinger printk(KERN_INFO "Releasing TCM Loop Core BUS\n"); 5693703b2c5SNicholas Bellinger } 5703703b2c5SNicholas Bellinger 5713703b2c5SNicholas Bellinger static char *tcm_loop_get_fabric_name(void) 5723703b2c5SNicholas Bellinger { 5733703b2c5SNicholas Bellinger return "loopback"; 5743703b2c5SNicholas Bellinger } 5753703b2c5SNicholas Bellinger 5763703b2c5SNicholas Bellinger static u8 tcm_loop_get_fabric_proto_ident(struct se_portal_group *se_tpg) 5773703b2c5SNicholas Bellinger { 5783703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = 5793703b2c5SNicholas Bellinger (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr; 5803703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 5813703b2c5SNicholas Bellinger /* 5823703b2c5SNicholas Bellinger * tl_proto_id is set at tcm_loop_configfs.c:tcm_loop_make_scsi_hba() 5833703b2c5SNicholas Bellinger * time based on the protocol dependent prefix of the passed configfs group. 5843703b2c5SNicholas Bellinger * 5853703b2c5SNicholas Bellinger * Based upon tl_proto_id, TCM_Loop emulates the requested fabric 5863703b2c5SNicholas Bellinger * ProtocolID using target_core_fabric_lib.c symbols. 5873703b2c5SNicholas Bellinger */ 5883703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 5893703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 5903703b2c5SNicholas Bellinger return sas_get_fabric_proto_ident(se_tpg); 5913703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 5923703b2c5SNicholas Bellinger return fc_get_fabric_proto_ident(se_tpg); 5933703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 5943703b2c5SNicholas Bellinger return iscsi_get_fabric_proto_ident(se_tpg); 5953703b2c5SNicholas Bellinger default: 5963703b2c5SNicholas Bellinger printk(KERN_ERR "Unknown tl_proto_id: 0x%02x, using" 5973703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 5983703b2c5SNicholas Bellinger break; 5993703b2c5SNicholas Bellinger } 6003703b2c5SNicholas Bellinger 6013703b2c5SNicholas Bellinger return sas_get_fabric_proto_ident(se_tpg); 6023703b2c5SNicholas Bellinger } 6033703b2c5SNicholas Bellinger 6043703b2c5SNicholas Bellinger static char *tcm_loop_get_endpoint_wwn(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 * Return the passed NAA identifier for the SAS Target Port 6103703b2c5SNicholas Bellinger */ 6113703b2c5SNicholas Bellinger return &tl_tpg->tl_hba->tl_wwn_address[0]; 6123703b2c5SNicholas Bellinger } 6133703b2c5SNicholas Bellinger 6143703b2c5SNicholas Bellinger static u16 tcm_loop_get_tag(struct se_portal_group *se_tpg) 6153703b2c5SNicholas Bellinger { 6163703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = 6173703b2c5SNicholas Bellinger (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr; 6183703b2c5SNicholas Bellinger /* 6193703b2c5SNicholas Bellinger * This Tag is used when forming SCSI Name identifier in EVPD=1 0x83 6203703b2c5SNicholas Bellinger * to represent the SCSI Target Port. 6213703b2c5SNicholas Bellinger */ 6223703b2c5SNicholas Bellinger return tl_tpg->tl_tpgt; 6233703b2c5SNicholas Bellinger } 6243703b2c5SNicholas Bellinger 6253703b2c5SNicholas Bellinger static u32 tcm_loop_get_default_depth(struct se_portal_group *se_tpg) 6263703b2c5SNicholas Bellinger { 6273703b2c5SNicholas Bellinger return 1; 6283703b2c5SNicholas Bellinger } 6293703b2c5SNicholas Bellinger 6303703b2c5SNicholas Bellinger static u32 tcm_loop_get_pr_transport_id( 6313703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 6323703b2c5SNicholas Bellinger struct se_node_acl *se_nacl, 6333703b2c5SNicholas Bellinger struct t10_pr_registration *pr_reg, 6343703b2c5SNicholas Bellinger int *format_code, 6353703b2c5SNicholas Bellinger unsigned char *buf) 6363703b2c5SNicholas Bellinger { 6373703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = 6383703b2c5SNicholas Bellinger (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr; 6393703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 6403703b2c5SNicholas Bellinger 6413703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 6423703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 6433703b2c5SNicholas Bellinger return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6443703b2c5SNicholas Bellinger format_code, buf); 6453703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 6463703b2c5SNicholas Bellinger return fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6473703b2c5SNicholas Bellinger format_code, buf); 6483703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 6493703b2c5SNicholas Bellinger return iscsi_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6503703b2c5SNicholas Bellinger format_code, buf); 6513703b2c5SNicholas Bellinger default: 6523703b2c5SNicholas Bellinger printk(KERN_ERR "Unknown tl_proto_id: 0x%02x, using" 6533703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 6543703b2c5SNicholas Bellinger break; 6553703b2c5SNicholas Bellinger } 6563703b2c5SNicholas Bellinger 6573703b2c5SNicholas Bellinger return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6583703b2c5SNicholas Bellinger format_code, buf); 6593703b2c5SNicholas Bellinger } 6603703b2c5SNicholas Bellinger 6613703b2c5SNicholas Bellinger static u32 tcm_loop_get_pr_transport_id_len( 6623703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 6633703b2c5SNicholas Bellinger struct se_node_acl *se_nacl, 6643703b2c5SNicholas Bellinger struct t10_pr_registration *pr_reg, 6653703b2c5SNicholas Bellinger int *format_code) 6663703b2c5SNicholas Bellinger { 6673703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = 6683703b2c5SNicholas Bellinger (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr; 6693703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 6703703b2c5SNicholas Bellinger 6713703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 6723703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 6733703b2c5SNicholas Bellinger return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6743703b2c5SNicholas Bellinger format_code); 6753703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 6763703b2c5SNicholas Bellinger return fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6773703b2c5SNicholas Bellinger format_code); 6783703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 6793703b2c5SNicholas Bellinger return iscsi_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6803703b2c5SNicholas Bellinger format_code); 6813703b2c5SNicholas Bellinger default: 6823703b2c5SNicholas Bellinger printk(KERN_ERR "Unknown tl_proto_id: 0x%02x, using" 6833703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 6843703b2c5SNicholas Bellinger break; 6853703b2c5SNicholas Bellinger } 6863703b2c5SNicholas Bellinger 6873703b2c5SNicholas Bellinger return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6883703b2c5SNicholas Bellinger format_code); 6893703b2c5SNicholas Bellinger } 6903703b2c5SNicholas Bellinger 6913703b2c5SNicholas Bellinger /* 6923703b2c5SNicholas Bellinger * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above 6933703b2c5SNicholas Bellinger * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations. 6943703b2c5SNicholas Bellinger */ 6953703b2c5SNicholas Bellinger static char *tcm_loop_parse_pr_out_transport_id( 6963703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 6973703b2c5SNicholas Bellinger const char *buf, 6983703b2c5SNicholas Bellinger u32 *out_tid_len, 6993703b2c5SNicholas Bellinger char **port_nexus_ptr) 7003703b2c5SNicholas Bellinger { 7013703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = 7023703b2c5SNicholas Bellinger (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr; 7033703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 7043703b2c5SNicholas Bellinger 7053703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 7063703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 7073703b2c5SNicholas Bellinger return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 7083703b2c5SNicholas Bellinger port_nexus_ptr); 7093703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 7103703b2c5SNicholas Bellinger return fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 7113703b2c5SNicholas Bellinger port_nexus_ptr); 7123703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 7133703b2c5SNicholas Bellinger return iscsi_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 7143703b2c5SNicholas Bellinger port_nexus_ptr); 7153703b2c5SNicholas Bellinger default: 7163703b2c5SNicholas Bellinger printk(KERN_ERR "Unknown tl_proto_id: 0x%02x, using" 7173703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 7183703b2c5SNicholas Bellinger break; 7193703b2c5SNicholas Bellinger } 7203703b2c5SNicholas Bellinger 7213703b2c5SNicholas Bellinger return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 7223703b2c5SNicholas Bellinger port_nexus_ptr); 7233703b2c5SNicholas Bellinger } 7243703b2c5SNicholas Bellinger 7253703b2c5SNicholas Bellinger /* 7263703b2c5SNicholas Bellinger * Returning (1) here allows for target_core_mod struct se_node_acl to be generated 7273703b2c5SNicholas Bellinger * based upon the incoming fabric dependent SCSI Initiator Port 7283703b2c5SNicholas Bellinger */ 7293703b2c5SNicholas Bellinger static int tcm_loop_check_demo_mode(struct se_portal_group *se_tpg) 7303703b2c5SNicholas Bellinger { 7313703b2c5SNicholas Bellinger return 1; 7323703b2c5SNicholas Bellinger } 7333703b2c5SNicholas Bellinger 7343703b2c5SNicholas Bellinger static int tcm_loop_check_demo_mode_cache(struct se_portal_group *se_tpg) 7353703b2c5SNicholas Bellinger { 7363703b2c5SNicholas Bellinger return 0; 7373703b2c5SNicholas Bellinger } 7383703b2c5SNicholas Bellinger 7393703b2c5SNicholas Bellinger /* 7403703b2c5SNicholas Bellinger * Allow I_T Nexus full READ-WRITE access without explict Initiator Node ACLs for 7413703b2c5SNicholas Bellinger * local virtual Linux/SCSI LLD passthrough into VM hypervisor guest 7423703b2c5SNicholas Bellinger */ 7433703b2c5SNicholas Bellinger static int tcm_loop_check_demo_mode_write_protect(struct se_portal_group *se_tpg) 7443703b2c5SNicholas Bellinger { 7453703b2c5SNicholas Bellinger return 0; 7463703b2c5SNicholas Bellinger } 7473703b2c5SNicholas Bellinger 7483703b2c5SNicholas Bellinger /* 7493703b2c5SNicholas Bellinger * Because TCM_Loop does not use explict ACLs and MappedLUNs, this will 7503703b2c5SNicholas Bellinger * never be called for TCM_Loop by target_core_fabric_configfs.c code. 7513703b2c5SNicholas Bellinger * It has been added here as a nop for target_fabric_tf_ops_check() 7523703b2c5SNicholas Bellinger */ 7533703b2c5SNicholas Bellinger static int tcm_loop_check_prod_mode_write_protect(struct se_portal_group *se_tpg) 7543703b2c5SNicholas Bellinger { 7553703b2c5SNicholas Bellinger return 0; 7563703b2c5SNicholas Bellinger } 7573703b2c5SNicholas Bellinger 7583703b2c5SNicholas Bellinger static struct se_node_acl *tcm_loop_tpg_alloc_fabric_acl( 7593703b2c5SNicholas Bellinger struct se_portal_group *se_tpg) 7603703b2c5SNicholas Bellinger { 7613703b2c5SNicholas Bellinger struct tcm_loop_nacl *tl_nacl; 7623703b2c5SNicholas Bellinger 7633703b2c5SNicholas Bellinger tl_nacl = kzalloc(sizeof(struct tcm_loop_nacl), GFP_KERNEL); 7643703b2c5SNicholas Bellinger if (!tl_nacl) { 7653703b2c5SNicholas Bellinger printk(KERN_ERR "Unable to allocate struct tcm_loop_nacl\n"); 7663703b2c5SNicholas Bellinger return NULL; 7673703b2c5SNicholas Bellinger } 7683703b2c5SNicholas Bellinger 7693703b2c5SNicholas Bellinger return &tl_nacl->se_node_acl; 7703703b2c5SNicholas Bellinger } 7713703b2c5SNicholas Bellinger 7723703b2c5SNicholas Bellinger static void tcm_loop_tpg_release_fabric_acl( 7733703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 7743703b2c5SNicholas Bellinger struct se_node_acl *se_nacl) 7753703b2c5SNicholas Bellinger { 7763703b2c5SNicholas Bellinger struct tcm_loop_nacl *tl_nacl = container_of(se_nacl, 7773703b2c5SNicholas Bellinger struct tcm_loop_nacl, se_node_acl); 7783703b2c5SNicholas Bellinger 7793703b2c5SNicholas Bellinger kfree(tl_nacl); 7803703b2c5SNicholas Bellinger } 7813703b2c5SNicholas Bellinger 7823703b2c5SNicholas Bellinger static u32 tcm_loop_get_inst_index(struct se_portal_group *se_tpg) 7833703b2c5SNicholas Bellinger { 7843703b2c5SNicholas Bellinger return 1; 7853703b2c5SNicholas Bellinger } 7863703b2c5SNicholas Bellinger 7873703b2c5SNicholas Bellinger static void tcm_loop_new_cmd_failure(struct se_cmd *se_cmd) 7883703b2c5SNicholas Bellinger { 7893703b2c5SNicholas Bellinger /* 7903703b2c5SNicholas Bellinger * Since TCM_loop is already passing struct scatterlist data from 7913703b2c5SNicholas Bellinger * struct scsi_cmnd, no more Linux/SCSI failure dependent state need 7923703b2c5SNicholas Bellinger * to be handled here. 7933703b2c5SNicholas Bellinger */ 7943703b2c5SNicholas Bellinger return; 7953703b2c5SNicholas Bellinger } 7963703b2c5SNicholas Bellinger 7973703b2c5SNicholas Bellinger static int tcm_loop_is_state_remove(struct se_cmd *se_cmd) 7983703b2c5SNicholas Bellinger { 7993703b2c5SNicholas Bellinger /* 8003703b2c5SNicholas Bellinger * Assume struct scsi_cmnd is not in remove state.. 8013703b2c5SNicholas Bellinger */ 8023703b2c5SNicholas Bellinger return 0; 8033703b2c5SNicholas Bellinger } 8043703b2c5SNicholas Bellinger 8053703b2c5SNicholas Bellinger static int tcm_loop_sess_logged_in(struct se_session *se_sess) 8063703b2c5SNicholas Bellinger { 8073703b2c5SNicholas Bellinger /* 8083703b2c5SNicholas Bellinger * Assume that TL Nexus is always active 8093703b2c5SNicholas Bellinger */ 8103703b2c5SNicholas Bellinger return 1; 8113703b2c5SNicholas Bellinger } 8123703b2c5SNicholas Bellinger 8133703b2c5SNicholas Bellinger static u32 tcm_loop_sess_get_index(struct se_session *se_sess) 8143703b2c5SNicholas Bellinger { 8153703b2c5SNicholas Bellinger return 1; 8163703b2c5SNicholas Bellinger } 8173703b2c5SNicholas Bellinger 8183703b2c5SNicholas Bellinger static void tcm_loop_set_default_node_attributes(struct se_node_acl *se_acl) 8193703b2c5SNicholas Bellinger { 8203703b2c5SNicholas Bellinger return; 8213703b2c5SNicholas Bellinger } 8223703b2c5SNicholas Bellinger 8233703b2c5SNicholas Bellinger static u32 tcm_loop_get_task_tag(struct se_cmd *se_cmd) 8243703b2c5SNicholas Bellinger { 8253703b2c5SNicholas Bellinger return 1; 8263703b2c5SNicholas Bellinger } 8273703b2c5SNicholas Bellinger 8283703b2c5SNicholas Bellinger static int tcm_loop_get_cmd_state(struct se_cmd *se_cmd) 8293703b2c5SNicholas Bellinger { 8303703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 8313703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 8323703b2c5SNicholas Bellinger 8333703b2c5SNicholas Bellinger return tl_cmd->sc_cmd_state; 8343703b2c5SNicholas Bellinger } 8353703b2c5SNicholas Bellinger 8363703b2c5SNicholas Bellinger static int tcm_loop_shutdown_session(struct se_session *se_sess) 8373703b2c5SNicholas Bellinger { 8383703b2c5SNicholas Bellinger return 0; 8393703b2c5SNicholas Bellinger } 8403703b2c5SNicholas Bellinger 8413703b2c5SNicholas Bellinger static void tcm_loop_close_session(struct se_session *se_sess) 8423703b2c5SNicholas Bellinger { 8433703b2c5SNicholas Bellinger return; 8443703b2c5SNicholas Bellinger }; 8453703b2c5SNicholas Bellinger 8463703b2c5SNicholas Bellinger static void tcm_loop_stop_session( 8473703b2c5SNicholas Bellinger struct se_session *se_sess, 8483703b2c5SNicholas Bellinger int sess_sleep, 8493703b2c5SNicholas Bellinger int conn_sleep) 8503703b2c5SNicholas Bellinger { 8513703b2c5SNicholas Bellinger return; 8523703b2c5SNicholas Bellinger } 8533703b2c5SNicholas Bellinger 8543703b2c5SNicholas Bellinger static void tcm_loop_fall_back_to_erl0(struct se_session *se_sess) 8553703b2c5SNicholas Bellinger { 8563703b2c5SNicholas Bellinger return; 8573703b2c5SNicholas Bellinger } 8583703b2c5SNicholas Bellinger 8593703b2c5SNicholas Bellinger static int tcm_loop_write_pending(struct se_cmd *se_cmd) 8603703b2c5SNicholas Bellinger { 8613703b2c5SNicholas Bellinger /* 8623703b2c5SNicholas Bellinger * Since Linux/SCSI has already sent down a struct scsi_cmnd 8633703b2c5SNicholas Bellinger * sc->sc_data_direction of DMA_TO_DEVICE with struct scatterlist array 8643703b2c5SNicholas Bellinger * memory, and memory has already been mapped to struct se_cmd->t_mem_list 8653703b2c5SNicholas Bellinger * format with transport_generic_map_mem_to_cmd(). 8663703b2c5SNicholas Bellinger * 8673703b2c5SNicholas Bellinger * We now tell TCM to add this WRITE CDB directly into the TCM storage 8683703b2c5SNicholas Bellinger * object execution queue. 8693703b2c5SNicholas Bellinger */ 8703703b2c5SNicholas Bellinger transport_generic_process_write(se_cmd); 8713703b2c5SNicholas Bellinger return 0; 8723703b2c5SNicholas Bellinger } 8733703b2c5SNicholas Bellinger 8743703b2c5SNicholas Bellinger static int tcm_loop_write_pending_status(struct se_cmd *se_cmd) 8753703b2c5SNicholas Bellinger { 8763703b2c5SNicholas Bellinger return 0; 8773703b2c5SNicholas Bellinger } 8783703b2c5SNicholas Bellinger 8793703b2c5SNicholas Bellinger static int tcm_loop_queue_data_in(struct se_cmd *se_cmd) 8803703b2c5SNicholas Bellinger { 8813703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 8823703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 8833703b2c5SNicholas Bellinger struct scsi_cmnd *sc = tl_cmd->sc; 8843703b2c5SNicholas Bellinger 8853703b2c5SNicholas Bellinger TL_CDB_DEBUG("tcm_loop_queue_data_in() called for scsi_cmnd: %p" 8863703b2c5SNicholas Bellinger " cdb: 0x%02x\n", sc, sc->cmnd[0]); 8873703b2c5SNicholas Bellinger 8883703b2c5SNicholas Bellinger sc->result = SAM_STAT_GOOD; 8893703b2c5SNicholas Bellinger set_host_byte(sc, DID_OK); 8903703b2c5SNicholas Bellinger sc->scsi_done(sc); 8913703b2c5SNicholas Bellinger return 0; 8923703b2c5SNicholas Bellinger } 8933703b2c5SNicholas Bellinger 8943703b2c5SNicholas Bellinger static int tcm_loop_queue_status(struct se_cmd *se_cmd) 8953703b2c5SNicholas Bellinger { 8963703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 8973703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 8983703b2c5SNicholas Bellinger struct scsi_cmnd *sc = tl_cmd->sc; 8993703b2c5SNicholas Bellinger 9003703b2c5SNicholas Bellinger TL_CDB_DEBUG("tcm_loop_queue_status() called for scsi_cmnd: %p" 9013703b2c5SNicholas Bellinger " cdb: 0x%02x\n", sc, sc->cmnd[0]); 9023703b2c5SNicholas Bellinger 9033703b2c5SNicholas Bellinger if (se_cmd->sense_buffer && 9043703b2c5SNicholas Bellinger ((se_cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || 9053703b2c5SNicholas Bellinger (se_cmd->se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { 9063703b2c5SNicholas Bellinger 9073703b2c5SNicholas Bellinger memcpy((void *)sc->sense_buffer, (void *)se_cmd->sense_buffer, 9083703b2c5SNicholas Bellinger SCSI_SENSE_BUFFERSIZE); 9093703b2c5SNicholas Bellinger sc->result = SAM_STAT_CHECK_CONDITION; 9103703b2c5SNicholas Bellinger set_driver_byte(sc, DRIVER_SENSE); 9113703b2c5SNicholas Bellinger } else 9123703b2c5SNicholas Bellinger sc->result = se_cmd->scsi_status; 9133703b2c5SNicholas Bellinger 9143703b2c5SNicholas Bellinger set_host_byte(sc, DID_OK); 9153703b2c5SNicholas Bellinger sc->scsi_done(sc); 9163703b2c5SNicholas Bellinger return 0; 9173703b2c5SNicholas Bellinger } 9183703b2c5SNicholas Bellinger 9193703b2c5SNicholas Bellinger static int tcm_loop_queue_tm_rsp(struct se_cmd *se_cmd) 9203703b2c5SNicholas Bellinger { 9213703b2c5SNicholas Bellinger struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 9223703b2c5SNicholas Bellinger struct tcm_loop_tmr *tl_tmr = se_tmr->fabric_tmr_ptr; 9233703b2c5SNicholas Bellinger /* 9243703b2c5SNicholas Bellinger * The SCSI EH thread will be sleeping on se_tmr->tl_tmr_wait, go ahead 9253703b2c5SNicholas Bellinger * and wake up the wait_queue_head_t in tcm_loop_device_reset() 9263703b2c5SNicholas Bellinger */ 9273703b2c5SNicholas Bellinger atomic_set(&tl_tmr->tmr_complete, 1); 9283703b2c5SNicholas Bellinger wake_up(&tl_tmr->tl_tmr_wait); 9293703b2c5SNicholas Bellinger return 0; 9303703b2c5SNicholas Bellinger } 9313703b2c5SNicholas Bellinger 9323703b2c5SNicholas Bellinger static u16 tcm_loop_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_length) 9333703b2c5SNicholas Bellinger { 9343703b2c5SNicholas Bellinger return 0; 9353703b2c5SNicholas Bellinger } 9363703b2c5SNicholas Bellinger 9373703b2c5SNicholas Bellinger static u16 tcm_loop_get_fabric_sense_len(void) 9383703b2c5SNicholas Bellinger { 9393703b2c5SNicholas Bellinger return 0; 9403703b2c5SNicholas Bellinger } 9413703b2c5SNicholas Bellinger 9423703b2c5SNicholas Bellinger static char *tcm_loop_dump_proto_id(struct tcm_loop_hba *tl_hba) 9433703b2c5SNicholas Bellinger { 9443703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 9453703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 9463703b2c5SNicholas Bellinger return "SAS"; 9473703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 9483703b2c5SNicholas Bellinger return "FCP"; 9493703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 9503703b2c5SNicholas Bellinger return "iSCSI"; 9513703b2c5SNicholas Bellinger default: 9523703b2c5SNicholas Bellinger break; 9533703b2c5SNicholas Bellinger } 9543703b2c5SNicholas Bellinger 9553703b2c5SNicholas Bellinger return "Unknown"; 9563703b2c5SNicholas Bellinger } 9573703b2c5SNicholas Bellinger 9583703b2c5SNicholas Bellinger /* Start items for tcm_loop_port_cit */ 9593703b2c5SNicholas Bellinger 9603703b2c5SNicholas Bellinger static int tcm_loop_port_link( 9613703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 9623703b2c5SNicholas Bellinger struct se_lun *lun) 9633703b2c5SNicholas Bellinger { 9643703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 9653703b2c5SNicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 9663703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 9673703b2c5SNicholas Bellinger 9683703b2c5SNicholas Bellinger atomic_inc(&tl_tpg->tl_tpg_port_count); 9693703b2c5SNicholas Bellinger smp_mb__after_atomic_inc(); 9703703b2c5SNicholas Bellinger /* 9713703b2c5SNicholas Bellinger * Add Linux/SCSI struct scsi_device by HCTL 9723703b2c5SNicholas Bellinger */ 9733703b2c5SNicholas Bellinger scsi_add_device(tl_hba->sh, 0, tl_tpg->tl_tpgt, lun->unpacked_lun); 9743703b2c5SNicholas Bellinger 9753703b2c5SNicholas Bellinger printk(KERN_INFO "TCM_Loop_ConfigFS: Port Link Successful\n"); 9763703b2c5SNicholas Bellinger return 0; 9773703b2c5SNicholas Bellinger } 9783703b2c5SNicholas Bellinger 9793703b2c5SNicholas Bellinger static void tcm_loop_port_unlink( 9803703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 9813703b2c5SNicholas Bellinger struct se_lun *se_lun) 9823703b2c5SNicholas Bellinger { 9833703b2c5SNicholas Bellinger struct scsi_device *sd; 9843703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 9853703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 9863703b2c5SNicholas Bellinger 9873703b2c5SNicholas Bellinger tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, tl_se_tpg); 9883703b2c5SNicholas Bellinger tl_hba = tl_tpg->tl_hba; 9893703b2c5SNicholas Bellinger 9903703b2c5SNicholas Bellinger sd = scsi_device_lookup(tl_hba->sh, 0, tl_tpg->tl_tpgt, 9913703b2c5SNicholas Bellinger se_lun->unpacked_lun); 9923703b2c5SNicholas Bellinger if (!sd) { 9933703b2c5SNicholas Bellinger printk(KERN_ERR "Unable to locate struct scsi_device for %d:%d:" 9943703b2c5SNicholas Bellinger "%d\n", 0, tl_tpg->tl_tpgt, se_lun->unpacked_lun); 9953703b2c5SNicholas Bellinger return; 9963703b2c5SNicholas Bellinger } 9973703b2c5SNicholas Bellinger /* 9983703b2c5SNicholas Bellinger * Remove Linux/SCSI struct scsi_device by HCTL 9993703b2c5SNicholas Bellinger */ 10003703b2c5SNicholas Bellinger scsi_remove_device(sd); 10013703b2c5SNicholas Bellinger scsi_device_put(sd); 10023703b2c5SNicholas Bellinger 10033703b2c5SNicholas Bellinger atomic_dec(&tl_tpg->tl_tpg_port_count); 10043703b2c5SNicholas Bellinger smp_mb__after_atomic_dec(); 10053703b2c5SNicholas Bellinger 10063703b2c5SNicholas Bellinger printk(KERN_INFO "TCM_Loop_ConfigFS: Port Unlink Successful\n"); 10073703b2c5SNicholas Bellinger } 10083703b2c5SNicholas Bellinger 10093703b2c5SNicholas Bellinger /* End items for tcm_loop_port_cit */ 10103703b2c5SNicholas Bellinger 10113703b2c5SNicholas Bellinger /* Start items for tcm_loop_nexus_cit */ 10123703b2c5SNicholas Bellinger 10133703b2c5SNicholas Bellinger static int tcm_loop_make_nexus( 10143703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg, 10153703b2c5SNicholas Bellinger const char *name) 10163703b2c5SNicholas Bellinger { 10173703b2c5SNicholas Bellinger struct se_portal_group *se_tpg; 10183703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 10193703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus; 1020552523dcSDan Carpenter int ret = -ENOMEM; 10213703b2c5SNicholas Bellinger 10223703b2c5SNicholas Bellinger if (tl_tpg->tl_hba->tl_nexus) { 10233703b2c5SNicholas Bellinger printk(KERN_INFO "tl_tpg->tl_hba->tl_nexus already exists\n"); 10243703b2c5SNicholas Bellinger return -EEXIST; 10253703b2c5SNicholas Bellinger } 10263703b2c5SNicholas Bellinger se_tpg = &tl_tpg->tl_se_tpg; 10273703b2c5SNicholas Bellinger 10283703b2c5SNicholas Bellinger tl_nexus = kzalloc(sizeof(struct tcm_loop_nexus), GFP_KERNEL); 10293703b2c5SNicholas Bellinger if (!tl_nexus) { 10303703b2c5SNicholas Bellinger printk(KERN_ERR "Unable to allocate struct tcm_loop_nexus\n"); 10313703b2c5SNicholas Bellinger return -ENOMEM; 10323703b2c5SNicholas Bellinger } 10333703b2c5SNicholas Bellinger /* 10343703b2c5SNicholas Bellinger * Initialize the struct se_session pointer 10353703b2c5SNicholas Bellinger */ 10363703b2c5SNicholas Bellinger tl_nexus->se_sess = transport_init_session(); 1037552523dcSDan Carpenter if (IS_ERR(tl_nexus->se_sess)) { 1038552523dcSDan Carpenter ret = PTR_ERR(tl_nexus->se_sess); 10393703b2c5SNicholas Bellinger goto out; 1040552523dcSDan Carpenter } 10413703b2c5SNicholas Bellinger /* 10423703b2c5SNicholas Bellinger * Since we are running in 'demo mode' this call with generate a 10433703b2c5SNicholas Bellinger * struct se_node_acl for the tcm_loop struct se_portal_group with the SCSI 10443703b2c5SNicholas Bellinger * Initiator port name of the passed configfs group 'name'. 10453703b2c5SNicholas Bellinger */ 10463703b2c5SNicholas Bellinger tl_nexus->se_sess->se_node_acl = core_tpg_check_initiator_node_acl( 10473703b2c5SNicholas Bellinger se_tpg, (unsigned char *)name); 10483703b2c5SNicholas Bellinger if (!tl_nexus->se_sess->se_node_acl) { 10493703b2c5SNicholas Bellinger transport_free_session(tl_nexus->se_sess); 10503703b2c5SNicholas Bellinger goto out; 10513703b2c5SNicholas Bellinger } 10523703b2c5SNicholas Bellinger /* 10533703b2c5SNicholas Bellinger * Now, register the SAS I_T Nexus as active with the call to 10543703b2c5SNicholas Bellinger * transport_register_session() 10553703b2c5SNicholas Bellinger */ 10563703b2c5SNicholas Bellinger __transport_register_session(se_tpg, tl_nexus->se_sess->se_node_acl, 10573703b2c5SNicholas Bellinger tl_nexus->se_sess, (void *)tl_nexus); 10583703b2c5SNicholas Bellinger tl_tpg->tl_hba->tl_nexus = tl_nexus; 10593703b2c5SNicholas Bellinger printk(KERN_INFO "TCM_Loop_ConfigFS: Established I_T Nexus to emulated" 10603703b2c5SNicholas Bellinger " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba), 10613703b2c5SNicholas Bellinger name); 10623703b2c5SNicholas Bellinger return 0; 10633703b2c5SNicholas Bellinger 10643703b2c5SNicholas Bellinger out: 10653703b2c5SNicholas Bellinger kfree(tl_nexus); 1066552523dcSDan Carpenter return ret; 10673703b2c5SNicholas Bellinger } 10683703b2c5SNicholas Bellinger 10693703b2c5SNicholas Bellinger static int tcm_loop_drop_nexus( 10703703b2c5SNicholas Bellinger struct tcm_loop_tpg *tpg) 10713703b2c5SNicholas Bellinger { 10723703b2c5SNicholas Bellinger struct se_session *se_sess; 10733703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus; 10743703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tpg->tl_hba; 10753703b2c5SNicholas Bellinger 10763703b2c5SNicholas Bellinger tl_nexus = tpg->tl_hba->tl_nexus; 10773703b2c5SNicholas Bellinger if (!tl_nexus) 10783703b2c5SNicholas Bellinger return -ENODEV; 10793703b2c5SNicholas Bellinger 10803703b2c5SNicholas Bellinger se_sess = tl_nexus->se_sess; 10813703b2c5SNicholas Bellinger if (!se_sess) 10823703b2c5SNicholas Bellinger return -ENODEV; 10833703b2c5SNicholas Bellinger 10843703b2c5SNicholas Bellinger if (atomic_read(&tpg->tl_tpg_port_count)) { 10853703b2c5SNicholas Bellinger printk(KERN_ERR "Unable to remove TCM_Loop I_T Nexus with" 10863703b2c5SNicholas Bellinger " active TPG port count: %d\n", 10873703b2c5SNicholas Bellinger atomic_read(&tpg->tl_tpg_port_count)); 10883703b2c5SNicholas Bellinger return -EPERM; 10893703b2c5SNicholas Bellinger } 10903703b2c5SNicholas Bellinger 10913703b2c5SNicholas Bellinger printk(KERN_INFO "TCM_Loop_ConfigFS: Removing I_T Nexus to emulated" 10923703b2c5SNicholas Bellinger " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba), 10933703b2c5SNicholas Bellinger tl_nexus->se_sess->se_node_acl->initiatorname); 10943703b2c5SNicholas Bellinger /* 10953703b2c5SNicholas Bellinger * Release the SCSI I_T Nexus to the emulated SAS Target Port 10963703b2c5SNicholas Bellinger */ 10973703b2c5SNicholas Bellinger transport_deregister_session(tl_nexus->se_sess); 10983703b2c5SNicholas Bellinger tpg->tl_hba->tl_nexus = NULL; 10993703b2c5SNicholas Bellinger kfree(tl_nexus); 11003703b2c5SNicholas Bellinger return 0; 11013703b2c5SNicholas Bellinger } 11023703b2c5SNicholas Bellinger 11033703b2c5SNicholas Bellinger /* End items for tcm_loop_nexus_cit */ 11043703b2c5SNicholas Bellinger 11053703b2c5SNicholas Bellinger static ssize_t tcm_loop_tpg_show_nexus( 11063703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 11073703b2c5SNicholas Bellinger char *page) 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_nexus *tl_nexus; 11123703b2c5SNicholas Bellinger ssize_t ret; 11133703b2c5SNicholas Bellinger 11143703b2c5SNicholas Bellinger tl_nexus = tl_tpg->tl_hba->tl_nexus; 11153703b2c5SNicholas Bellinger if (!tl_nexus) 11163703b2c5SNicholas Bellinger return -ENODEV; 11173703b2c5SNicholas Bellinger 11183703b2c5SNicholas Bellinger ret = snprintf(page, PAGE_SIZE, "%s\n", 11193703b2c5SNicholas Bellinger tl_nexus->se_sess->se_node_acl->initiatorname); 11203703b2c5SNicholas Bellinger 11213703b2c5SNicholas Bellinger return ret; 11223703b2c5SNicholas Bellinger } 11233703b2c5SNicholas Bellinger 11243703b2c5SNicholas Bellinger static ssize_t tcm_loop_tpg_store_nexus( 11253703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 11263703b2c5SNicholas Bellinger const char *page, 11273703b2c5SNicholas Bellinger size_t count) 11283703b2c5SNicholas Bellinger { 11293703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 11303703b2c5SNicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 11313703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 11323703b2c5SNicholas Bellinger unsigned char i_port[TL_WWN_ADDR_LEN], *ptr, *port_ptr; 11333703b2c5SNicholas Bellinger int ret; 11343703b2c5SNicholas Bellinger /* 11353703b2c5SNicholas Bellinger * Shutdown the active I_T nexus if 'NULL' is passed.. 11363703b2c5SNicholas Bellinger */ 11373703b2c5SNicholas Bellinger if (!strncmp(page, "NULL", 4)) { 11383703b2c5SNicholas Bellinger ret = tcm_loop_drop_nexus(tl_tpg); 11393703b2c5SNicholas Bellinger return (!ret) ? count : ret; 11403703b2c5SNicholas Bellinger } 11413703b2c5SNicholas Bellinger /* 11423703b2c5SNicholas Bellinger * Otherwise make sure the passed virtual Initiator port WWN matches 11433703b2c5SNicholas Bellinger * the fabric protocol_id set in tcm_loop_make_scsi_hba(), and call 11443703b2c5SNicholas Bellinger * tcm_loop_make_nexus() 11453703b2c5SNicholas Bellinger */ 114660d645a4SDan Carpenter if (strlen(page) >= TL_WWN_ADDR_LEN) { 11473703b2c5SNicholas Bellinger printk(KERN_ERR "Emulated NAA Sas Address: %s, exceeds" 11483703b2c5SNicholas Bellinger " max: %d\n", page, TL_WWN_ADDR_LEN); 11493703b2c5SNicholas Bellinger return -EINVAL; 11503703b2c5SNicholas Bellinger } 11513703b2c5SNicholas Bellinger snprintf(&i_port[0], TL_WWN_ADDR_LEN, "%s", page); 11523703b2c5SNicholas Bellinger 11533703b2c5SNicholas Bellinger ptr = strstr(i_port, "naa."); 11543703b2c5SNicholas Bellinger if (ptr) { 11553703b2c5SNicholas Bellinger if (tl_hba->tl_proto_id != SCSI_PROTOCOL_SAS) { 11563703b2c5SNicholas Bellinger printk(KERN_ERR "Passed SAS Initiator Port %s does not" 11573703b2c5SNicholas Bellinger " match target port protoid: %s\n", i_port, 11583703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba)); 11593703b2c5SNicholas Bellinger return -EINVAL; 11603703b2c5SNicholas Bellinger } 11613703b2c5SNicholas Bellinger port_ptr = &i_port[0]; 11623703b2c5SNicholas Bellinger goto check_newline; 11633703b2c5SNicholas Bellinger } 11643703b2c5SNicholas Bellinger ptr = strstr(i_port, "fc."); 11653703b2c5SNicholas Bellinger if (ptr) { 11663703b2c5SNicholas Bellinger if (tl_hba->tl_proto_id != SCSI_PROTOCOL_FCP) { 11673703b2c5SNicholas Bellinger printk(KERN_ERR "Passed FCP Initiator Port %s does not" 11683703b2c5SNicholas Bellinger " match target port protoid: %s\n", i_port, 11693703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba)); 11703703b2c5SNicholas Bellinger return -EINVAL; 11713703b2c5SNicholas Bellinger } 11723703b2c5SNicholas Bellinger port_ptr = &i_port[3]; /* Skip over "fc." */ 11733703b2c5SNicholas Bellinger goto check_newline; 11743703b2c5SNicholas Bellinger } 11753703b2c5SNicholas Bellinger ptr = strstr(i_port, "iqn."); 11763703b2c5SNicholas Bellinger if (ptr) { 11773703b2c5SNicholas Bellinger if (tl_hba->tl_proto_id != SCSI_PROTOCOL_ISCSI) { 11783703b2c5SNicholas Bellinger printk(KERN_ERR "Passed iSCSI Initiator Port %s does not" 11793703b2c5SNicholas Bellinger " match target port protoid: %s\n", i_port, 11803703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba)); 11813703b2c5SNicholas Bellinger return -EINVAL; 11823703b2c5SNicholas Bellinger } 11833703b2c5SNicholas Bellinger port_ptr = &i_port[0]; 11843703b2c5SNicholas Bellinger goto check_newline; 11853703b2c5SNicholas Bellinger } 11863703b2c5SNicholas Bellinger printk(KERN_ERR "Unable to locate prefix for emulated Initiator Port:" 11873703b2c5SNicholas Bellinger " %s\n", i_port); 11883703b2c5SNicholas Bellinger return -EINVAL; 11893703b2c5SNicholas Bellinger /* 11903703b2c5SNicholas Bellinger * Clear any trailing newline for the NAA WWN 11913703b2c5SNicholas Bellinger */ 11923703b2c5SNicholas Bellinger check_newline: 11933703b2c5SNicholas Bellinger if (i_port[strlen(i_port)-1] == '\n') 11943703b2c5SNicholas Bellinger i_port[strlen(i_port)-1] = '\0'; 11953703b2c5SNicholas Bellinger 11963703b2c5SNicholas Bellinger ret = tcm_loop_make_nexus(tl_tpg, port_ptr); 11973703b2c5SNicholas Bellinger if (ret < 0) 11983703b2c5SNicholas Bellinger return ret; 11993703b2c5SNicholas Bellinger 12003703b2c5SNicholas Bellinger return count; 12013703b2c5SNicholas Bellinger } 12023703b2c5SNicholas Bellinger 12033703b2c5SNicholas Bellinger TF_TPG_BASE_ATTR(tcm_loop, nexus, S_IRUGO | S_IWUSR); 12043703b2c5SNicholas Bellinger 12053703b2c5SNicholas Bellinger static struct configfs_attribute *tcm_loop_tpg_attrs[] = { 12063703b2c5SNicholas Bellinger &tcm_loop_tpg_nexus.attr, 12073703b2c5SNicholas Bellinger NULL, 12083703b2c5SNicholas Bellinger }; 12093703b2c5SNicholas Bellinger 12103703b2c5SNicholas Bellinger /* Start items for tcm_loop_naa_cit */ 12113703b2c5SNicholas Bellinger 12123703b2c5SNicholas Bellinger struct se_portal_group *tcm_loop_make_naa_tpg( 12133703b2c5SNicholas Bellinger struct se_wwn *wwn, 12143703b2c5SNicholas Bellinger struct config_group *group, 12153703b2c5SNicholas Bellinger const char *name) 12163703b2c5SNicholas Bellinger { 12173703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = container_of(wwn, 12183703b2c5SNicholas Bellinger struct tcm_loop_hba, tl_hba_wwn); 12193703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 12203703b2c5SNicholas Bellinger char *tpgt_str, *end_ptr; 12213703b2c5SNicholas Bellinger int ret; 12223703b2c5SNicholas Bellinger unsigned short int tpgt; 12233703b2c5SNicholas Bellinger 12243703b2c5SNicholas Bellinger tpgt_str = strstr(name, "tpgt_"); 12253703b2c5SNicholas Bellinger if (!tpgt_str) { 12263703b2c5SNicholas Bellinger printk(KERN_ERR "Unable to locate \"tpgt_#\" directory" 12273703b2c5SNicholas Bellinger " group\n"); 12283703b2c5SNicholas Bellinger return ERR_PTR(-EINVAL); 12293703b2c5SNicholas Bellinger } 12303703b2c5SNicholas Bellinger tpgt_str += 5; /* Skip ahead of "tpgt_" */ 12313703b2c5SNicholas Bellinger tpgt = (unsigned short int) simple_strtoul(tpgt_str, &end_ptr, 0); 12323703b2c5SNicholas Bellinger 12333703b2c5SNicholas Bellinger if (tpgt > TL_TPGS_PER_HBA) { 12343703b2c5SNicholas Bellinger printk(KERN_ERR "Passed tpgt: %hu exceeds TL_TPGS_PER_HBA:" 12353703b2c5SNicholas Bellinger " %u\n", tpgt, TL_TPGS_PER_HBA); 12363703b2c5SNicholas Bellinger return ERR_PTR(-EINVAL); 12373703b2c5SNicholas Bellinger } 12383703b2c5SNicholas Bellinger tl_tpg = &tl_hba->tl_hba_tpgs[tpgt]; 12393703b2c5SNicholas Bellinger tl_tpg->tl_hba = tl_hba; 12403703b2c5SNicholas Bellinger tl_tpg->tl_tpgt = tpgt; 12413703b2c5SNicholas Bellinger /* 12423703b2c5SNicholas Bellinger * Register the tl_tpg as a emulated SAS TCM Target Endpoint 12433703b2c5SNicholas Bellinger */ 12443703b2c5SNicholas Bellinger ret = core_tpg_register(&tcm_loop_fabric_configfs->tf_ops, 12453703b2c5SNicholas Bellinger wwn, &tl_tpg->tl_se_tpg, (void *)tl_tpg, 12463703b2c5SNicholas Bellinger TRANSPORT_TPG_TYPE_NORMAL); 12473703b2c5SNicholas Bellinger if (ret < 0) 12483703b2c5SNicholas Bellinger return ERR_PTR(-ENOMEM); 12493703b2c5SNicholas Bellinger 12503703b2c5SNicholas Bellinger printk(KERN_INFO "TCM_Loop_ConfigFS: Allocated Emulated %s" 12513703b2c5SNicholas Bellinger " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba), 12523703b2c5SNicholas Bellinger config_item_name(&wwn->wwn_group.cg_item), tpgt); 12533703b2c5SNicholas Bellinger 12543703b2c5SNicholas Bellinger return &tl_tpg->tl_se_tpg; 12553703b2c5SNicholas Bellinger } 12563703b2c5SNicholas Bellinger 12573703b2c5SNicholas Bellinger void tcm_loop_drop_naa_tpg( 12583703b2c5SNicholas Bellinger struct se_portal_group *se_tpg) 12593703b2c5SNicholas Bellinger { 12603703b2c5SNicholas Bellinger struct se_wwn *wwn = se_tpg->se_tpg_wwn; 12613703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 12623703b2c5SNicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 12633703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 12643703b2c5SNicholas Bellinger unsigned short tpgt; 12653703b2c5SNicholas Bellinger 12663703b2c5SNicholas Bellinger tl_hba = tl_tpg->tl_hba; 12673703b2c5SNicholas Bellinger tpgt = tl_tpg->tl_tpgt; 12683703b2c5SNicholas Bellinger /* 12693703b2c5SNicholas Bellinger * Release the I_T Nexus for the Virtual SAS link if present 12703703b2c5SNicholas Bellinger */ 12713703b2c5SNicholas Bellinger tcm_loop_drop_nexus(tl_tpg); 12723703b2c5SNicholas Bellinger /* 12733703b2c5SNicholas Bellinger * Deregister the tl_tpg as a emulated SAS TCM Target Endpoint 12743703b2c5SNicholas Bellinger */ 12753703b2c5SNicholas Bellinger core_tpg_deregister(se_tpg); 12763703b2c5SNicholas Bellinger 12773703b2c5SNicholas Bellinger printk(KERN_INFO "TCM_Loop_ConfigFS: Deallocated Emulated %s" 12783703b2c5SNicholas Bellinger " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba), 12793703b2c5SNicholas Bellinger config_item_name(&wwn->wwn_group.cg_item), tpgt); 12803703b2c5SNicholas Bellinger } 12813703b2c5SNicholas Bellinger 12823703b2c5SNicholas Bellinger /* End items for tcm_loop_naa_cit */ 12833703b2c5SNicholas Bellinger 12843703b2c5SNicholas Bellinger /* Start items for tcm_loop_cit */ 12853703b2c5SNicholas Bellinger 12863703b2c5SNicholas Bellinger struct se_wwn *tcm_loop_make_scsi_hba( 12873703b2c5SNicholas Bellinger struct target_fabric_configfs *tf, 12883703b2c5SNicholas Bellinger struct config_group *group, 12893703b2c5SNicholas Bellinger const char *name) 12903703b2c5SNicholas Bellinger { 12913703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 12923703b2c5SNicholas Bellinger struct Scsi_Host *sh; 12933703b2c5SNicholas Bellinger char *ptr; 12943703b2c5SNicholas Bellinger int ret, off = 0; 12953703b2c5SNicholas Bellinger 12963703b2c5SNicholas Bellinger tl_hba = kzalloc(sizeof(struct tcm_loop_hba), GFP_KERNEL); 12973703b2c5SNicholas Bellinger if (!tl_hba) { 12983703b2c5SNicholas Bellinger printk(KERN_ERR "Unable to allocate struct tcm_loop_hba\n"); 12993703b2c5SNicholas Bellinger return ERR_PTR(-ENOMEM); 13003703b2c5SNicholas Bellinger } 13013703b2c5SNicholas Bellinger /* 13023703b2c5SNicholas Bellinger * Determine the emulated Protocol Identifier and Target Port Name 13033703b2c5SNicholas Bellinger * based on the incoming configfs directory name. 13043703b2c5SNicholas Bellinger */ 13053703b2c5SNicholas Bellinger ptr = strstr(name, "naa."); 13063703b2c5SNicholas Bellinger if (ptr) { 13073703b2c5SNicholas Bellinger tl_hba->tl_proto_id = SCSI_PROTOCOL_SAS; 13083703b2c5SNicholas Bellinger goto check_len; 13093703b2c5SNicholas Bellinger } 13103703b2c5SNicholas Bellinger ptr = strstr(name, "fc."); 13113703b2c5SNicholas Bellinger if (ptr) { 13123703b2c5SNicholas Bellinger tl_hba->tl_proto_id = SCSI_PROTOCOL_FCP; 13133703b2c5SNicholas Bellinger off = 3; /* Skip over "fc." */ 13143703b2c5SNicholas Bellinger goto check_len; 13153703b2c5SNicholas Bellinger } 13163703b2c5SNicholas Bellinger ptr = strstr(name, "iqn."); 13173703b2c5SNicholas Bellinger if (ptr) { 13183703b2c5SNicholas Bellinger tl_hba->tl_proto_id = SCSI_PROTOCOL_ISCSI; 13193703b2c5SNicholas Bellinger goto check_len; 13203703b2c5SNicholas Bellinger } 13213703b2c5SNicholas Bellinger 13223703b2c5SNicholas Bellinger printk(KERN_ERR "Unable to locate prefix for emulated Target Port:" 13233703b2c5SNicholas Bellinger " %s\n", name); 13243703b2c5SNicholas Bellinger return ERR_PTR(-EINVAL); 13253703b2c5SNicholas Bellinger 13263703b2c5SNicholas Bellinger check_len: 132760d645a4SDan Carpenter if (strlen(name) >= TL_WWN_ADDR_LEN) { 13283703b2c5SNicholas Bellinger printk(KERN_ERR "Emulated NAA %s Address: %s, exceeds" 13293703b2c5SNicholas Bellinger " max: %d\n", name, tcm_loop_dump_proto_id(tl_hba), 13303703b2c5SNicholas Bellinger TL_WWN_ADDR_LEN); 13313703b2c5SNicholas Bellinger kfree(tl_hba); 13323703b2c5SNicholas Bellinger return ERR_PTR(-EINVAL); 13333703b2c5SNicholas Bellinger } 13343703b2c5SNicholas Bellinger snprintf(&tl_hba->tl_wwn_address[0], TL_WWN_ADDR_LEN, "%s", &name[off]); 13353703b2c5SNicholas Bellinger 13363703b2c5SNicholas Bellinger /* 13373703b2c5SNicholas Bellinger * Call device_register(tl_hba->dev) to register the emulated 13383703b2c5SNicholas Bellinger * Linux/SCSI LLD of type struct Scsi_Host at tl_hba->sh after 13393703b2c5SNicholas Bellinger * device_register() callbacks in tcm_loop_driver_probe() 13403703b2c5SNicholas Bellinger */ 13413703b2c5SNicholas Bellinger ret = tcm_loop_setup_hba_bus(tl_hba, tcm_loop_hba_no_cnt); 13423703b2c5SNicholas Bellinger if (ret) 13433703b2c5SNicholas Bellinger goto out; 13443703b2c5SNicholas Bellinger 13453703b2c5SNicholas Bellinger sh = tl_hba->sh; 13463703b2c5SNicholas Bellinger tcm_loop_hba_no_cnt++; 13473703b2c5SNicholas Bellinger printk(KERN_INFO "TCM_Loop_ConfigFS: Allocated emulated Target" 13483703b2c5SNicholas Bellinger " %s Address: %s at Linux/SCSI Host ID: %d\n", 13493703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba), name, sh->host_no); 13503703b2c5SNicholas Bellinger 13513703b2c5SNicholas Bellinger return &tl_hba->tl_hba_wwn; 13523703b2c5SNicholas Bellinger out: 13533703b2c5SNicholas Bellinger kfree(tl_hba); 13543703b2c5SNicholas Bellinger return ERR_PTR(ret); 13553703b2c5SNicholas Bellinger } 13563703b2c5SNicholas Bellinger 13573703b2c5SNicholas Bellinger void tcm_loop_drop_scsi_hba( 13583703b2c5SNicholas Bellinger struct se_wwn *wwn) 13593703b2c5SNicholas Bellinger { 13603703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = container_of(wwn, 13613703b2c5SNicholas Bellinger struct tcm_loop_hba, tl_hba_wwn); 13623703b2c5SNicholas Bellinger int host_no = tl_hba->sh->host_no; 13633703b2c5SNicholas Bellinger /* 13643703b2c5SNicholas Bellinger * Call device_unregister() on the original tl_hba->dev. 13653703b2c5SNicholas Bellinger * tcm_loop_fabric_scsi.c:tcm_loop_release_adapter() will 13663703b2c5SNicholas Bellinger * release *tl_hba; 13673703b2c5SNicholas Bellinger */ 13683703b2c5SNicholas Bellinger device_unregister(&tl_hba->dev); 13693703b2c5SNicholas Bellinger 13703703b2c5SNicholas Bellinger printk(KERN_INFO "TCM_Loop_ConfigFS: Deallocated emulated Target" 13713703b2c5SNicholas Bellinger " SAS Address: %s at Linux/SCSI Host ID: %d\n", 13723703b2c5SNicholas Bellinger config_item_name(&wwn->wwn_group.cg_item), host_no); 13733703b2c5SNicholas Bellinger } 13743703b2c5SNicholas Bellinger 13753703b2c5SNicholas Bellinger /* Start items for tcm_loop_cit */ 13763703b2c5SNicholas Bellinger static ssize_t tcm_loop_wwn_show_attr_version( 13773703b2c5SNicholas Bellinger struct target_fabric_configfs *tf, 13783703b2c5SNicholas Bellinger char *page) 13793703b2c5SNicholas Bellinger { 13803703b2c5SNicholas Bellinger return sprintf(page, "TCM Loopback Fabric module %s\n", TCM_LOOP_VERSION); 13813703b2c5SNicholas Bellinger } 13823703b2c5SNicholas Bellinger 13833703b2c5SNicholas Bellinger TF_WWN_ATTR_RO(tcm_loop, version); 13843703b2c5SNicholas Bellinger 13853703b2c5SNicholas Bellinger static struct configfs_attribute *tcm_loop_wwn_attrs[] = { 13863703b2c5SNicholas Bellinger &tcm_loop_wwn_version.attr, 13873703b2c5SNicholas Bellinger NULL, 13883703b2c5SNicholas Bellinger }; 13893703b2c5SNicholas Bellinger 13903703b2c5SNicholas Bellinger /* End items for tcm_loop_cit */ 13913703b2c5SNicholas Bellinger 13923703b2c5SNicholas Bellinger static int tcm_loop_register_configfs(void) 13933703b2c5SNicholas Bellinger { 13943703b2c5SNicholas Bellinger struct target_fabric_configfs *fabric; 13953703b2c5SNicholas Bellinger struct config_group *tf_cg; 13963703b2c5SNicholas Bellinger int ret; 13973703b2c5SNicholas Bellinger /* 13983703b2c5SNicholas Bellinger * Set the TCM Loop HBA counter to zero 13993703b2c5SNicholas Bellinger */ 14003703b2c5SNicholas Bellinger tcm_loop_hba_no_cnt = 0; 14013703b2c5SNicholas Bellinger /* 14023703b2c5SNicholas Bellinger * Register the top level struct config_item_type with TCM core 14033703b2c5SNicholas Bellinger */ 14043703b2c5SNicholas Bellinger fabric = target_fabric_configfs_init(THIS_MODULE, "loopback"); 14053703b2c5SNicholas Bellinger if (!fabric) { 14063703b2c5SNicholas Bellinger printk(KERN_ERR "tcm_loop_register_configfs() failed!\n"); 14073703b2c5SNicholas Bellinger return -1; 14083703b2c5SNicholas Bellinger } 14093703b2c5SNicholas Bellinger /* 14103703b2c5SNicholas Bellinger * Setup the fabric API of function pointers used by target_core_mod 14113703b2c5SNicholas Bellinger */ 14123703b2c5SNicholas Bellinger fabric->tf_ops.get_fabric_name = &tcm_loop_get_fabric_name; 14133703b2c5SNicholas Bellinger fabric->tf_ops.get_fabric_proto_ident = &tcm_loop_get_fabric_proto_ident; 14143703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_wwn = &tcm_loop_get_endpoint_wwn; 14153703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_tag = &tcm_loop_get_tag; 14163703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_default_depth = &tcm_loop_get_default_depth; 14173703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_pr_transport_id = &tcm_loop_get_pr_transport_id; 14183703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_pr_transport_id_len = 14193703b2c5SNicholas Bellinger &tcm_loop_get_pr_transport_id_len; 14203703b2c5SNicholas Bellinger fabric->tf_ops.tpg_parse_pr_out_transport_id = 14213703b2c5SNicholas Bellinger &tcm_loop_parse_pr_out_transport_id; 14223703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_demo_mode = &tcm_loop_check_demo_mode; 14233703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_demo_mode_cache = 14243703b2c5SNicholas Bellinger &tcm_loop_check_demo_mode_cache; 14253703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_demo_mode_write_protect = 14263703b2c5SNicholas Bellinger &tcm_loop_check_demo_mode_write_protect; 14273703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_prod_mode_write_protect = 14283703b2c5SNicholas Bellinger &tcm_loop_check_prod_mode_write_protect; 14293703b2c5SNicholas Bellinger /* 14303703b2c5SNicholas Bellinger * The TCM loopback fabric module runs in demo-mode to a local 14313703b2c5SNicholas Bellinger * virtual SCSI device, so fabric dependent initator ACLs are 14323703b2c5SNicholas Bellinger * not required. 14333703b2c5SNicholas Bellinger */ 14343703b2c5SNicholas Bellinger fabric->tf_ops.tpg_alloc_fabric_acl = &tcm_loop_tpg_alloc_fabric_acl; 14353703b2c5SNicholas Bellinger fabric->tf_ops.tpg_release_fabric_acl = 14363703b2c5SNicholas Bellinger &tcm_loop_tpg_release_fabric_acl; 14373703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_inst_index = &tcm_loop_get_inst_index; 14383703b2c5SNicholas Bellinger /* 14393703b2c5SNicholas Bellinger * Since tcm_loop is mapping physical memory from Linux/SCSI 14403703b2c5SNicholas Bellinger * struct scatterlist arrays for each struct scsi_cmnd I/O, 14413703b2c5SNicholas Bellinger * we do not need TCM to allocate a iovec array for 14423703b2c5SNicholas Bellinger * virtual memory address mappings 14433703b2c5SNicholas Bellinger */ 14443703b2c5SNicholas Bellinger fabric->tf_ops.alloc_cmd_iovecs = NULL; 14453703b2c5SNicholas Bellinger /* 14463703b2c5SNicholas Bellinger * Used for setting up remaining TCM resources in process context 14473703b2c5SNicholas Bellinger */ 14483703b2c5SNicholas Bellinger fabric->tf_ops.new_cmd_map = &tcm_loop_new_cmd_map; 14493703b2c5SNicholas Bellinger fabric->tf_ops.check_stop_free = &tcm_loop_check_stop_free; 14503703b2c5SNicholas Bellinger fabric->tf_ops.release_cmd_to_pool = &tcm_loop_deallocate_core_cmd; 14513703b2c5SNicholas Bellinger fabric->tf_ops.release_cmd_direct = &tcm_loop_deallocate_core_cmd; 14523703b2c5SNicholas Bellinger fabric->tf_ops.shutdown_session = &tcm_loop_shutdown_session; 14533703b2c5SNicholas Bellinger fabric->tf_ops.close_session = &tcm_loop_close_session; 14543703b2c5SNicholas Bellinger fabric->tf_ops.stop_session = &tcm_loop_stop_session; 14553703b2c5SNicholas Bellinger fabric->tf_ops.fall_back_to_erl0 = &tcm_loop_fall_back_to_erl0; 14563703b2c5SNicholas Bellinger fabric->tf_ops.sess_logged_in = &tcm_loop_sess_logged_in; 14573703b2c5SNicholas Bellinger fabric->tf_ops.sess_get_index = &tcm_loop_sess_get_index; 14583703b2c5SNicholas Bellinger fabric->tf_ops.sess_get_initiator_sid = NULL; 14593703b2c5SNicholas Bellinger fabric->tf_ops.write_pending = &tcm_loop_write_pending; 14603703b2c5SNicholas Bellinger fabric->tf_ops.write_pending_status = &tcm_loop_write_pending_status; 14613703b2c5SNicholas Bellinger /* 14623703b2c5SNicholas Bellinger * Not used for TCM loopback 14633703b2c5SNicholas Bellinger */ 14643703b2c5SNicholas Bellinger fabric->tf_ops.set_default_node_attributes = 14653703b2c5SNicholas Bellinger &tcm_loop_set_default_node_attributes; 14663703b2c5SNicholas Bellinger fabric->tf_ops.get_task_tag = &tcm_loop_get_task_tag; 14673703b2c5SNicholas Bellinger fabric->tf_ops.get_cmd_state = &tcm_loop_get_cmd_state; 14683703b2c5SNicholas Bellinger fabric->tf_ops.new_cmd_failure = &tcm_loop_new_cmd_failure; 14693703b2c5SNicholas Bellinger fabric->tf_ops.queue_data_in = &tcm_loop_queue_data_in; 14703703b2c5SNicholas Bellinger fabric->tf_ops.queue_status = &tcm_loop_queue_status; 14713703b2c5SNicholas Bellinger fabric->tf_ops.queue_tm_rsp = &tcm_loop_queue_tm_rsp; 14723703b2c5SNicholas Bellinger fabric->tf_ops.set_fabric_sense_len = &tcm_loop_set_fabric_sense_len; 14733703b2c5SNicholas Bellinger fabric->tf_ops.get_fabric_sense_len = &tcm_loop_get_fabric_sense_len; 14743703b2c5SNicholas Bellinger fabric->tf_ops.is_state_remove = &tcm_loop_is_state_remove; 14753703b2c5SNicholas Bellinger 14763703b2c5SNicholas Bellinger tf_cg = &fabric->tf_group; 14773703b2c5SNicholas Bellinger /* 14783703b2c5SNicholas Bellinger * Setup function pointers for generic logic in target_core_fabric_configfs.c 14793703b2c5SNicholas Bellinger */ 14803703b2c5SNicholas Bellinger fabric->tf_ops.fabric_make_wwn = &tcm_loop_make_scsi_hba; 14813703b2c5SNicholas Bellinger fabric->tf_ops.fabric_drop_wwn = &tcm_loop_drop_scsi_hba; 14823703b2c5SNicholas Bellinger fabric->tf_ops.fabric_make_tpg = &tcm_loop_make_naa_tpg; 14833703b2c5SNicholas Bellinger fabric->tf_ops.fabric_drop_tpg = &tcm_loop_drop_naa_tpg; 14843703b2c5SNicholas Bellinger /* 14853703b2c5SNicholas Bellinger * fabric_post_link() and fabric_pre_unlink() are used for 14863703b2c5SNicholas Bellinger * registration and release of TCM Loop Virtual SCSI LUNs. 14873703b2c5SNicholas Bellinger */ 14883703b2c5SNicholas Bellinger fabric->tf_ops.fabric_post_link = &tcm_loop_port_link; 14893703b2c5SNicholas Bellinger fabric->tf_ops.fabric_pre_unlink = &tcm_loop_port_unlink; 14903703b2c5SNicholas Bellinger fabric->tf_ops.fabric_make_np = NULL; 14913703b2c5SNicholas Bellinger fabric->tf_ops.fabric_drop_np = NULL; 14923703b2c5SNicholas Bellinger /* 14933703b2c5SNicholas Bellinger * Setup default attribute lists for various fabric->tf_cit_tmpl 14943703b2c5SNicholas Bellinger */ 14953703b2c5SNicholas Bellinger TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = tcm_loop_wwn_attrs; 14963703b2c5SNicholas Bellinger TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = tcm_loop_tpg_attrs; 14973703b2c5SNicholas Bellinger TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL; 14983703b2c5SNicholas Bellinger TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL; 14993703b2c5SNicholas Bellinger TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL; 15003703b2c5SNicholas Bellinger /* 15013703b2c5SNicholas Bellinger * Once fabric->tf_ops has been setup, now register the fabric for 15023703b2c5SNicholas Bellinger * use within TCM 15033703b2c5SNicholas Bellinger */ 15043703b2c5SNicholas Bellinger ret = target_fabric_configfs_register(fabric); 15053703b2c5SNicholas Bellinger if (ret < 0) { 15063703b2c5SNicholas Bellinger printk(KERN_ERR "target_fabric_configfs_register() for" 15073703b2c5SNicholas Bellinger " TCM_Loop failed!\n"); 15083703b2c5SNicholas Bellinger target_fabric_configfs_free(fabric); 15093703b2c5SNicholas Bellinger return -1; 15103703b2c5SNicholas Bellinger } 15113703b2c5SNicholas Bellinger /* 15123703b2c5SNicholas Bellinger * Setup our local pointer to *fabric. 15133703b2c5SNicholas Bellinger */ 15143703b2c5SNicholas Bellinger tcm_loop_fabric_configfs = fabric; 15153703b2c5SNicholas Bellinger printk(KERN_INFO "TCM_LOOP[0] - Set fabric ->" 15163703b2c5SNicholas Bellinger " tcm_loop_fabric_configfs\n"); 15173703b2c5SNicholas Bellinger return 0; 15183703b2c5SNicholas Bellinger } 15193703b2c5SNicholas Bellinger 15203703b2c5SNicholas Bellinger static void tcm_loop_deregister_configfs(void) 15213703b2c5SNicholas Bellinger { 15223703b2c5SNicholas Bellinger if (!tcm_loop_fabric_configfs) 15233703b2c5SNicholas Bellinger return; 15243703b2c5SNicholas Bellinger 15253703b2c5SNicholas Bellinger target_fabric_configfs_deregister(tcm_loop_fabric_configfs); 15263703b2c5SNicholas Bellinger tcm_loop_fabric_configfs = NULL; 15273703b2c5SNicholas Bellinger printk(KERN_INFO "TCM_LOOP[0] - Cleared" 15283703b2c5SNicholas Bellinger " tcm_loop_fabric_configfs\n"); 15293703b2c5SNicholas Bellinger } 15303703b2c5SNicholas Bellinger 15313703b2c5SNicholas Bellinger static int __init tcm_loop_fabric_init(void) 15323703b2c5SNicholas Bellinger { 15333703b2c5SNicholas Bellinger int ret; 15343703b2c5SNicholas Bellinger 15353703b2c5SNicholas Bellinger tcm_loop_cmd_cache = kmem_cache_create("tcm_loop_cmd_cache", 15363703b2c5SNicholas Bellinger sizeof(struct tcm_loop_cmd), 15373703b2c5SNicholas Bellinger __alignof__(struct tcm_loop_cmd), 15383703b2c5SNicholas Bellinger 0, NULL); 15393703b2c5SNicholas Bellinger if (!tcm_loop_cmd_cache) { 15403703b2c5SNicholas Bellinger printk(KERN_ERR "kmem_cache_create() for" 15413703b2c5SNicholas Bellinger " tcm_loop_cmd_cache failed\n"); 15423703b2c5SNicholas Bellinger return -ENOMEM; 15433703b2c5SNicholas Bellinger } 15443703b2c5SNicholas Bellinger 15453703b2c5SNicholas Bellinger ret = tcm_loop_alloc_core_bus(); 15463703b2c5SNicholas Bellinger if (ret) 15473703b2c5SNicholas Bellinger return ret; 15483703b2c5SNicholas Bellinger 15493703b2c5SNicholas Bellinger ret = tcm_loop_register_configfs(); 15503703b2c5SNicholas Bellinger if (ret) { 15513703b2c5SNicholas Bellinger tcm_loop_release_core_bus(); 15523703b2c5SNicholas Bellinger return ret; 15533703b2c5SNicholas Bellinger } 15543703b2c5SNicholas Bellinger 15553703b2c5SNicholas Bellinger return 0; 15563703b2c5SNicholas Bellinger } 15573703b2c5SNicholas Bellinger 15583703b2c5SNicholas Bellinger static void __exit tcm_loop_fabric_exit(void) 15593703b2c5SNicholas Bellinger { 15603703b2c5SNicholas Bellinger tcm_loop_deregister_configfs(); 15613703b2c5SNicholas Bellinger tcm_loop_release_core_bus(); 15623703b2c5SNicholas Bellinger kmem_cache_destroy(tcm_loop_cmd_cache); 15633703b2c5SNicholas Bellinger } 15643703b2c5SNicholas Bellinger 15653703b2c5SNicholas Bellinger MODULE_DESCRIPTION("TCM loopback virtual Linux/SCSI fabric module"); 15663703b2c5SNicholas Bellinger MODULE_AUTHOR("Nicholas A. Bellinger <nab@risingtidesystems.com>"); 15673703b2c5SNicholas Bellinger MODULE_LICENSE("GPL"); 15683703b2c5SNicholas Bellinger module_init(tcm_loop_fabric_init); 15693703b2c5SNicholas Bellinger module_exit(tcm_loop_fabric_exit); 1570