1c66ac9dbSNicholas Bellinger /******************************************************************************* 2c66ac9dbSNicholas Bellinger * Filename: target_core_pscsi.c 3c66ac9dbSNicholas Bellinger * 4c66ac9dbSNicholas Bellinger * This file contains the generic target mode <-> Linux SCSI subsystem plugin. 5c66ac9dbSNicholas Bellinger * 6c66ac9dbSNicholas Bellinger * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. 7c66ac9dbSNicholas Bellinger * Copyright (c) 2005, 2006, 2007 SBE, Inc. 8c66ac9dbSNicholas Bellinger * Copyright (c) 2007-2010 Rising Tide Systems 9c66ac9dbSNicholas Bellinger * Copyright (c) 2008-2010 Linux-iSCSI.org 10c66ac9dbSNicholas Bellinger * 11c66ac9dbSNicholas Bellinger * Nicholas A. Bellinger <nab@kernel.org> 12c66ac9dbSNicholas Bellinger * 13c66ac9dbSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 14c66ac9dbSNicholas Bellinger * it under the terms of the GNU General Public License as published by 15c66ac9dbSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 16c66ac9dbSNicholas Bellinger * (at your option) any later version. 17c66ac9dbSNicholas Bellinger * 18c66ac9dbSNicholas Bellinger * This program is distributed in the hope that it will be useful, 19c66ac9dbSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 20c66ac9dbSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21c66ac9dbSNicholas Bellinger * GNU General Public License for more details. 22c66ac9dbSNicholas Bellinger * 23c66ac9dbSNicholas Bellinger * You should have received a copy of the GNU General Public License 24c66ac9dbSNicholas Bellinger * along with this program; if not, write to the Free Software 25c66ac9dbSNicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 26c66ac9dbSNicholas Bellinger * 27c66ac9dbSNicholas Bellinger ******************************************************************************/ 28c66ac9dbSNicholas Bellinger 29c66ac9dbSNicholas Bellinger #include <linux/string.h> 30c66ac9dbSNicholas Bellinger #include <linux/parser.h> 31c66ac9dbSNicholas Bellinger #include <linux/timer.h> 32c66ac9dbSNicholas Bellinger #include <linux/blkdev.h> 33c66ac9dbSNicholas Bellinger #include <linux/blk_types.h> 34c66ac9dbSNicholas Bellinger #include <linux/slab.h> 35c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 36c66ac9dbSNicholas Bellinger #include <linux/genhd.h> 37c66ac9dbSNicholas Bellinger #include <linux/cdrom.h> 38d6e0175cSChristoph Hellwig #include <linux/ratelimit.h> 39827509e3SPaul Gortmaker #include <linux/module.h> 40d6e0175cSChristoph Hellwig #include <asm/unaligned.h> 41d6e0175cSChristoph Hellwig 42c66ac9dbSNicholas Bellinger #include <scsi/scsi.h> 43c66ac9dbSNicholas Bellinger #include <scsi/scsi_device.h> 44c66ac9dbSNicholas Bellinger #include <scsi/scsi_cmnd.h> 45c66ac9dbSNicholas Bellinger #include <scsi/scsi_host.h> 46e66ecd50SNicholas Bellinger #include <scsi/scsi_tcq.h> 47c66ac9dbSNicholas Bellinger 48c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 49c4795fb2SChristoph Hellwig #include <target/target_core_backend.h> 50c66ac9dbSNicholas Bellinger 51d6e0175cSChristoph Hellwig #include "target_core_alua.h" 52c66ac9dbSNicholas Bellinger #include "target_core_pscsi.h" 53c66ac9dbSNicholas Bellinger 54c66ac9dbSNicholas Bellinger #define ISPRINT(a) ((a >= ' ') && (a <= '~')) 55c66ac9dbSNicholas Bellinger 56c66ac9dbSNicholas Bellinger static struct se_subsystem_api pscsi_template; 57c66ac9dbSNicholas Bellinger 580c2ad7d1SChristoph Hellwig static int pscsi_execute_cmd(struct se_cmd *cmd); 59c66ac9dbSNicholas Bellinger static void pscsi_req_done(struct request *, int); 60c66ac9dbSNicholas Bellinger 61c66ac9dbSNicholas Bellinger /* pscsi_attach_hba(): 62c66ac9dbSNicholas Bellinger * 63c66ac9dbSNicholas Bellinger * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. 64c66ac9dbSNicholas Bellinger * from the passed SCSI Host ID. 65c66ac9dbSNicholas Bellinger */ 66c66ac9dbSNicholas Bellinger static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) 67c66ac9dbSNicholas Bellinger { 68c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv; 69c66ac9dbSNicholas Bellinger 70c66ac9dbSNicholas Bellinger phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); 716708bb27SAndy Grover if (!phv) { 726708bb27SAndy Grover pr_err("Unable to allocate struct pscsi_hba_virt\n"); 73e3d6f909SAndy Grover return -ENOMEM; 74c66ac9dbSNicholas Bellinger } 75c66ac9dbSNicholas Bellinger phv->phv_host_id = host_id; 76e6a8a41aSStefan Hajnoczi phv->phv_mode = PHV_VIRTUAL_HOST_ID; 77c66ac9dbSNicholas Bellinger 785951146dSAndy Grover hba->hba_ptr = phv; 79c66ac9dbSNicholas Bellinger 806708bb27SAndy Grover pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on" 81c66ac9dbSNicholas Bellinger " Generic Target Core Stack %s\n", hba->hba_id, 82c66ac9dbSNicholas Bellinger PSCSI_VERSION, TARGET_CORE_MOD_VERSION); 836708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n", 84e3d6f909SAndy Grover hba->hba_id); 85c66ac9dbSNicholas Bellinger 86c66ac9dbSNicholas Bellinger return 0; 87c66ac9dbSNicholas Bellinger } 88c66ac9dbSNicholas Bellinger 89c66ac9dbSNicholas Bellinger static void pscsi_detach_hba(struct se_hba *hba) 90c66ac9dbSNicholas Bellinger { 91c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 92c66ac9dbSNicholas Bellinger struct Scsi_Host *scsi_host = phv->phv_lld_host; 93c66ac9dbSNicholas Bellinger 94c66ac9dbSNicholas Bellinger if (scsi_host) { 95c66ac9dbSNicholas Bellinger scsi_host_put(scsi_host); 96c66ac9dbSNicholas Bellinger 976708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from" 98c66ac9dbSNicholas Bellinger " Generic Target Core\n", hba->hba_id, 99c66ac9dbSNicholas Bellinger (scsi_host->hostt->name) ? (scsi_host->hostt->name) : 100c66ac9dbSNicholas Bellinger "Unknown"); 101c66ac9dbSNicholas Bellinger } else 1026708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA" 103c66ac9dbSNicholas Bellinger " from Generic Target Core\n", hba->hba_id); 104c66ac9dbSNicholas Bellinger 105c66ac9dbSNicholas Bellinger kfree(phv); 106c66ac9dbSNicholas Bellinger hba->hba_ptr = NULL; 107c66ac9dbSNicholas Bellinger } 108c66ac9dbSNicholas Bellinger 109c66ac9dbSNicholas Bellinger static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) 110c66ac9dbSNicholas Bellinger { 1118359cf43SJörn Engel struct pscsi_hba_virt *phv = hba->hba_ptr; 112c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 113c66ac9dbSNicholas Bellinger /* 114c66ac9dbSNicholas Bellinger * Release the struct Scsi_Host 115c66ac9dbSNicholas Bellinger */ 1166708bb27SAndy Grover if (!mode_flag) { 1176708bb27SAndy Grover if (!sh) 118c66ac9dbSNicholas Bellinger return 0; 119c66ac9dbSNicholas Bellinger 120c66ac9dbSNicholas Bellinger phv->phv_lld_host = NULL; 121e6a8a41aSStefan Hajnoczi phv->phv_mode = PHV_VIRTUAL_HOST_ID; 122c66ac9dbSNicholas Bellinger 1236708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" 124c66ac9dbSNicholas Bellinger " %s\n", hba->hba_id, (sh->hostt->name) ? 125c66ac9dbSNicholas Bellinger (sh->hostt->name) : "Unknown"); 126c66ac9dbSNicholas Bellinger 127c66ac9dbSNicholas Bellinger scsi_host_put(sh); 128c66ac9dbSNicholas Bellinger return 0; 129c66ac9dbSNicholas Bellinger } 130c66ac9dbSNicholas Bellinger /* 131c66ac9dbSNicholas Bellinger * Otherwise, locate struct Scsi_Host from the original passed 132c66ac9dbSNicholas Bellinger * pSCSI Host ID and enable for phba mode 133c66ac9dbSNicholas Bellinger */ 134e3d6f909SAndy Grover sh = scsi_host_lookup(phv->phv_host_id); 135e3d6f909SAndy Grover if (IS_ERR(sh)) { 1366708bb27SAndy Grover pr_err("pSCSI: Unable to locate SCSI Host for" 137c66ac9dbSNicholas Bellinger " phv_host_id: %d\n", phv->phv_host_id); 138e3d6f909SAndy Grover return PTR_ERR(sh); 139c66ac9dbSNicholas Bellinger } 140c66ac9dbSNicholas Bellinger 141c66ac9dbSNicholas Bellinger phv->phv_lld_host = sh; 142c66ac9dbSNicholas Bellinger phv->phv_mode = PHV_LLD_SCSI_HOST_NO; 143c66ac9dbSNicholas Bellinger 1446708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", 145c66ac9dbSNicholas Bellinger hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); 146c66ac9dbSNicholas Bellinger 147c66ac9dbSNicholas Bellinger return 1; 148c66ac9dbSNicholas Bellinger } 149c66ac9dbSNicholas Bellinger 150c66ac9dbSNicholas Bellinger static void pscsi_tape_read_blocksize(struct se_device *dev, 151c66ac9dbSNicholas Bellinger struct scsi_device *sdev) 152c66ac9dbSNicholas Bellinger { 153c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 154c66ac9dbSNicholas Bellinger int ret; 155c66ac9dbSNicholas Bellinger 156c66ac9dbSNicholas Bellinger buf = kzalloc(12, GFP_KERNEL); 157c66ac9dbSNicholas Bellinger if (!buf) 158c66ac9dbSNicholas Bellinger return; 159c66ac9dbSNicholas Bellinger 160c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 161c66ac9dbSNicholas Bellinger cdb[0] = MODE_SENSE; 162c66ac9dbSNicholas Bellinger cdb[4] = 0x0c; /* 12 bytes */ 163c66ac9dbSNicholas Bellinger 164c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, 165c66ac9dbSNicholas Bellinger HZ, 1, NULL); 166c66ac9dbSNicholas Bellinger if (ret) 167c66ac9dbSNicholas Bellinger goto out_free; 168c66ac9dbSNicholas Bellinger 169c66ac9dbSNicholas Bellinger /* 170c66ac9dbSNicholas Bellinger * If MODE_SENSE still returns zero, set the default value to 1024. 171c66ac9dbSNicholas Bellinger */ 172c66ac9dbSNicholas Bellinger sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); 173c66ac9dbSNicholas Bellinger if (!sdev->sector_size) 174c66ac9dbSNicholas Bellinger sdev->sector_size = 1024; 175c66ac9dbSNicholas Bellinger out_free: 176c66ac9dbSNicholas Bellinger kfree(buf); 177c66ac9dbSNicholas Bellinger } 178c66ac9dbSNicholas Bellinger 179c66ac9dbSNicholas Bellinger static void 180c66ac9dbSNicholas Bellinger pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) 181c66ac9dbSNicholas Bellinger { 182c66ac9dbSNicholas Bellinger unsigned char *buf; 183c66ac9dbSNicholas Bellinger 184c66ac9dbSNicholas Bellinger if (sdev->inquiry_len < INQUIRY_LEN) 185c66ac9dbSNicholas Bellinger return; 186c66ac9dbSNicholas Bellinger 187c66ac9dbSNicholas Bellinger buf = sdev->inquiry; 188c66ac9dbSNicholas Bellinger if (!buf) 189c66ac9dbSNicholas Bellinger return; 190c66ac9dbSNicholas Bellinger /* 191c66ac9dbSNicholas Bellinger * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() 192c66ac9dbSNicholas Bellinger */ 193c66ac9dbSNicholas Bellinger memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); 194c66ac9dbSNicholas Bellinger memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); 195c66ac9dbSNicholas Bellinger memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); 196c66ac9dbSNicholas Bellinger } 197c66ac9dbSNicholas Bellinger 198c66ac9dbSNicholas Bellinger static int 199c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) 200c66ac9dbSNicholas Bellinger { 201c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 202c66ac9dbSNicholas Bellinger int ret; 203c66ac9dbSNicholas Bellinger 204c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 205c66ac9dbSNicholas Bellinger if (!buf) 206e3d6f909SAndy Grover return -ENOMEM; 207c66ac9dbSNicholas Bellinger 208c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 209c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 210c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 211c66ac9dbSNicholas Bellinger cdb[2] = 0x80; /* Unit Serial Number */ 212c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; 213c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); 214c66ac9dbSNicholas Bellinger 215c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 216c66ac9dbSNicholas Bellinger INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); 217c66ac9dbSNicholas Bellinger if (ret) 218c66ac9dbSNicholas Bellinger goto out_free; 219c66ac9dbSNicholas Bellinger 220c66ac9dbSNicholas Bellinger snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); 221c66ac9dbSNicholas Bellinger 222c66ac9dbSNicholas Bellinger wwn->t10_sub_dev->su_dev_flags |= SDF_FIRMWARE_VPD_UNIT_SERIAL; 223c66ac9dbSNicholas Bellinger 224c66ac9dbSNicholas Bellinger kfree(buf); 225c66ac9dbSNicholas Bellinger return 0; 226c66ac9dbSNicholas Bellinger 227c66ac9dbSNicholas Bellinger out_free: 228c66ac9dbSNicholas Bellinger kfree(buf); 229e3d6f909SAndy Grover return -EPERM; 230c66ac9dbSNicholas Bellinger } 231c66ac9dbSNicholas Bellinger 232c66ac9dbSNicholas Bellinger static void 233c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, 234c66ac9dbSNicholas Bellinger struct t10_wwn *wwn) 235c66ac9dbSNicholas Bellinger { 236c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; 237c66ac9dbSNicholas Bellinger int ident_len, page_len, off = 4, ret; 238c66ac9dbSNicholas Bellinger struct t10_vpd *vpd; 239c66ac9dbSNicholas Bellinger 240c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 241c66ac9dbSNicholas Bellinger if (!buf) 242c66ac9dbSNicholas Bellinger return; 243c66ac9dbSNicholas Bellinger 244c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 245c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 246c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 247c66ac9dbSNicholas Bellinger cdb[2] = 0x83; /* Device Identifier */ 248c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; 249c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); 250c66ac9dbSNicholas Bellinger 251c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 252c66ac9dbSNicholas Bellinger INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, 253c66ac9dbSNicholas Bellinger NULL, HZ, 1, NULL); 254c66ac9dbSNicholas Bellinger if (ret) 255c66ac9dbSNicholas Bellinger goto out; 256c66ac9dbSNicholas Bellinger 257c66ac9dbSNicholas Bellinger page_len = (buf[2] << 8) | buf[3]; 258c66ac9dbSNicholas Bellinger while (page_len > 0) { 259c66ac9dbSNicholas Bellinger /* Grab a pointer to the Identification descriptor */ 260c66ac9dbSNicholas Bellinger page_83 = &buf[off]; 261c66ac9dbSNicholas Bellinger ident_len = page_83[3]; 262c66ac9dbSNicholas Bellinger if (!ident_len) { 2636708bb27SAndy Grover pr_err("page_83[3]: identifier" 264c66ac9dbSNicholas Bellinger " length zero!\n"); 265c66ac9dbSNicholas Bellinger break; 266c66ac9dbSNicholas Bellinger } 2676708bb27SAndy Grover pr_debug("T10 VPD Identifer Length: %d\n", ident_len); 268c66ac9dbSNicholas Bellinger 269c66ac9dbSNicholas Bellinger vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); 270c66ac9dbSNicholas Bellinger if (!vpd) { 2716708bb27SAndy Grover pr_err("Unable to allocate memory for" 272c66ac9dbSNicholas Bellinger " struct t10_vpd\n"); 273c66ac9dbSNicholas Bellinger goto out; 274c66ac9dbSNicholas Bellinger } 275c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&vpd->vpd_list); 276c66ac9dbSNicholas Bellinger 277c66ac9dbSNicholas Bellinger transport_set_vpd_proto_id(vpd, page_83); 278c66ac9dbSNicholas Bellinger transport_set_vpd_assoc(vpd, page_83); 279c66ac9dbSNicholas Bellinger 280c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident_type(vpd, page_83) < 0) { 281c66ac9dbSNicholas Bellinger off += (ident_len + 4); 282c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 283c66ac9dbSNicholas Bellinger kfree(vpd); 284c66ac9dbSNicholas Bellinger continue; 285c66ac9dbSNicholas Bellinger } 286c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident(vpd, page_83) < 0) { 287c66ac9dbSNicholas Bellinger off += (ident_len + 4); 288c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 289c66ac9dbSNicholas Bellinger kfree(vpd); 290c66ac9dbSNicholas Bellinger continue; 291c66ac9dbSNicholas Bellinger } 292c66ac9dbSNicholas Bellinger 293c66ac9dbSNicholas Bellinger list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); 294c66ac9dbSNicholas Bellinger off += (ident_len + 4); 295c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 296c66ac9dbSNicholas Bellinger } 297c66ac9dbSNicholas Bellinger 298c66ac9dbSNicholas Bellinger out: 299c66ac9dbSNicholas Bellinger kfree(buf); 300c66ac9dbSNicholas Bellinger } 301c66ac9dbSNicholas Bellinger 302c66ac9dbSNicholas Bellinger /* pscsi_add_device_to_list(): 303c66ac9dbSNicholas Bellinger * 304c66ac9dbSNicholas Bellinger * 305c66ac9dbSNicholas Bellinger */ 306c66ac9dbSNicholas Bellinger static struct se_device *pscsi_add_device_to_list( 307c66ac9dbSNicholas Bellinger struct se_hba *hba, 308c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 309c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 310c66ac9dbSNicholas Bellinger struct scsi_device *sd, 311c66ac9dbSNicholas Bellinger int dev_flags) 312c66ac9dbSNicholas Bellinger { 313c66ac9dbSNicholas Bellinger struct se_device *dev; 314c66ac9dbSNicholas Bellinger struct se_dev_limits dev_limits; 315c66ac9dbSNicholas Bellinger struct request_queue *q; 316c66ac9dbSNicholas Bellinger struct queue_limits *limits; 317c66ac9dbSNicholas Bellinger 318c66ac9dbSNicholas Bellinger memset(&dev_limits, 0, sizeof(struct se_dev_limits)); 319c66ac9dbSNicholas Bellinger 320c66ac9dbSNicholas Bellinger if (!sd->queue_depth) { 321c66ac9dbSNicholas Bellinger sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; 322c66ac9dbSNicholas Bellinger 3236708bb27SAndy Grover pr_err("Set broken SCSI Device %d:%d:%d" 324c66ac9dbSNicholas Bellinger " queue_depth to %d\n", sd->channel, sd->id, 325c66ac9dbSNicholas Bellinger sd->lun, sd->queue_depth); 326c66ac9dbSNicholas Bellinger } 327c66ac9dbSNicholas Bellinger /* 328c66ac9dbSNicholas Bellinger * Setup the local scope queue_limits from struct request_queue->limits 329c66ac9dbSNicholas Bellinger * to pass into transport_add_device_to_core_hba() as struct se_dev_limits. 330c66ac9dbSNicholas Bellinger */ 331c66ac9dbSNicholas Bellinger q = sd->request_queue; 332c66ac9dbSNicholas Bellinger limits = &dev_limits.limits; 333c66ac9dbSNicholas Bellinger limits->logical_block_size = sd->sector_size; 334a1d8b49aSAndy Grover limits->max_hw_sectors = min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q)); 335a1d8b49aSAndy Grover limits->max_sectors = min_t(int, sd->host->max_sectors, queue_max_sectors(q)); 336c66ac9dbSNicholas Bellinger dev_limits.hw_queue_depth = sd->queue_depth; 337c66ac9dbSNicholas Bellinger dev_limits.queue_depth = sd->queue_depth; 338c66ac9dbSNicholas Bellinger /* 339c66ac9dbSNicholas Bellinger * Setup our standard INQUIRY info into se_dev->t10_wwn 340c66ac9dbSNicholas Bellinger */ 341c66ac9dbSNicholas Bellinger pscsi_set_inquiry_info(sd, &se_dev->t10_wwn); 342c66ac9dbSNicholas Bellinger 343c66ac9dbSNicholas Bellinger /* 344c66ac9dbSNicholas Bellinger * Set the pointer pdv->pdv_sd to from passed struct scsi_device, 345c66ac9dbSNicholas Bellinger * which has already been referenced with Linux SCSI code with 346c66ac9dbSNicholas Bellinger * scsi_device_get() in this file's pscsi_create_virtdevice(). 347c66ac9dbSNicholas Bellinger * 348c66ac9dbSNicholas Bellinger * The passthrough operations called by the transport_add_device_* 349c66ac9dbSNicholas Bellinger * function below will require this pointer to be set for passthroug 350c66ac9dbSNicholas Bellinger * ops. 351c66ac9dbSNicholas Bellinger * 352c66ac9dbSNicholas Bellinger * For the shutdown case in pscsi_free_device(), this struct 353c66ac9dbSNicholas Bellinger * scsi_device reference is released with Linux SCSI code 354c66ac9dbSNicholas Bellinger * scsi_device_put() and the pdv->pdv_sd cleared. 355c66ac9dbSNicholas Bellinger */ 356c66ac9dbSNicholas Bellinger pdv->pdv_sd = sd; 357c66ac9dbSNicholas Bellinger dev = transport_add_device_to_core_hba(hba, &pscsi_template, 3585951146dSAndy Grover se_dev, dev_flags, pdv, 359c66ac9dbSNicholas Bellinger &dev_limits, NULL, NULL); 3606708bb27SAndy Grover if (!dev) { 361c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 362c66ac9dbSNicholas Bellinger return NULL; 363c66ac9dbSNicholas Bellinger } 364c66ac9dbSNicholas Bellinger 365c66ac9dbSNicholas Bellinger /* 366c66ac9dbSNicholas Bellinger * Locate VPD WWN Information used for various purposes within 367c66ac9dbSNicholas Bellinger * the Storage Engine. 368c66ac9dbSNicholas Bellinger */ 369c66ac9dbSNicholas Bellinger if (!pscsi_get_inquiry_vpd_serial(sd, &se_dev->t10_wwn)) { 370c66ac9dbSNicholas Bellinger /* 371c66ac9dbSNicholas Bellinger * If VPD Unit Serial returned GOOD status, try 372c66ac9dbSNicholas Bellinger * VPD Device Identification page (0x83). 373c66ac9dbSNicholas Bellinger */ 374c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_device_ident(sd, &se_dev->t10_wwn); 375c66ac9dbSNicholas Bellinger } 376c66ac9dbSNicholas Bellinger 377c66ac9dbSNicholas Bellinger /* 378c66ac9dbSNicholas Bellinger * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. 379c66ac9dbSNicholas Bellinger */ 380c66ac9dbSNicholas Bellinger if (sd->type == TYPE_TAPE) 381c66ac9dbSNicholas Bellinger pscsi_tape_read_blocksize(dev, sd); 382c66ac9dbSNicholas Bellinger return dev; 383c66ac9dbSNicholas Bellinger } 384c66ac9dbSNicholas Bellinger 385c66ac9dbSNicholas Bellinger static void *pscsi_allocate_virtdevice(struct se_hba *hba, const char *name) 386c66ac9dbSNicholas Bellinger { 387c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv; 388c66ac9dbSNicholas Bellinger 389c66ac9dbSNicholas Bellinger pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); 3906708bb27SAndy Grover if (!pdv) { 3916708bb27SAndy Grover pr_err("Unable to allocate memory for struct pscsi_dev_virt\n"); 392c66ac9dbSNicholas Bellinger return NULL; 393c66ac9dbSNicholas Bellinger } 394c66ac9dbSNicholas Bellinger pdv->pdv_se_hba = hba; 395c66ac9dbSNicholas Bellinger 3966708bb27SAndy Grover pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name); 3975951146dSAndy Grover return pdv; 398c66ac9dbSNicholas Bellinger } 399c66ac9dbSNicholas Bellinger 400c66ac9dbSNicholas Bellinger /* 401c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 402c66ac9dbSNicholas Bellinger */ 403c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_type_disk( 404c66ac9dbSNicholas Bellinger struct scsi_device *sd, 405c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 406c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 407c66ac9dbSNicholas Bellinger struct se_hba *hba) 4085dd7ed2eSDan Carpenter __releases(sh->host_lock) 409c66ac9dbSNicholas Bellinger { 410c66ac9dbSNicholas Bellinger struct se_device *dev; 4118359cf43SJörn Engel struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; 412c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 413c66ac9dbSNicholas Bellinger struct block_device *bd; 414c66ac9dbSNicholas Bellinger u32 dev_flags = 0; 415c66ac9dbSNicholas Bellinger 416c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 4176708bb27SAndy Grover pr_err("scsi_device_get() failed for %d:%d:%d:%d\n", 418c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 419c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 420c66ac9dbSNicholas Bellinger return NULL; 421c66ac9dbSNicholas Bellinger } 422c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 423c66ac9dbSNicholas Bellinger /* 424c66ac9dbSNicholas Bellinger * Claim exclusive struct block_device access to struct scsi_device 425c66ac9dbSNicholas Bellinger * for TYPE_DISK using supplied udev_path 426c66ac9dbSNicholas Bellinger */ 427c66ac9dbSNicholas Bellinger bd = blkdev_get_by_path(se_dev->se_dev_udev_path, 428c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); 4293ae279d2SDan Carpenter if (IS_ERR(bd)) { 4306708bb27SAndy Grover pr_err("pSCSI: blkdev_get_by_path() failed\n"); 431c66ac9dbSNicholas Bellinger scsi_device_put(sd); 432c66ac9dbSNicholas Bellinger return NULL; 433c66ac9dbSNicholas Bellinger } 434c66ac9dbSNicholas Bellinger pdv->pdv_bd = bd; 435c66ac9dbSNicholas Bellinger 436c66ac9dbSNicholas Bellinger dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); 4376708bb27SAndy Grover if (!dev) { 438c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); 439c66ac9dbSNicholas Bellinger scsi_device_put(sd); 440c66ac9dbSNicholas Bellinger return NULL; 441c66ac9dbSNicholas Bellinger } 4426708bb27SAndy Grover pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%d\n", 443c66ac9dbSNicholas Bellinger phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); 444c66ac9dbSNicholas Bellinger 445c66ac9dbSNicholas Bellinger return dev; 446c66ac9dbSNicholas Bellinger } 447c66ac9dbSNicholas Bellinger 448c66ac9dbSNicholas Bellinger /* 449c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 450c66ac9dbSNicholas Bellinger */ 451c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_type_rom( 452c66ac9dbSNicholas Bellinger struct scsi_device *sd, 453c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 454c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 455c66ac9dbSNicholas Bellinger struct se_hba *hba) 4565dd7ed2eSDan Carpenter __releases(sh->host_lock) 457c66ac9dbSNicholas Bellinger { 458c66ac9dbSNicholas Bellinger struct se_device *dev; 4598359cf43SJörn Engel struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; 460c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 461c66ac9dbSNicholas Bellinger u32 dev_flags = 0; 462c66ac9dbSNicholas Bellinger 463c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 4646708bb27SAndy Grover pr_err("scsi_device_get() failed for %d:%d:%d:%d\n", 465c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 466c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 467c66ac9dbSNicholas Bellinger return NULL; 468c66ac9dbSNicholas Bellinger } 469c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 470c66ac9dbSNicholas Bellinger 471c66ac9dbSNicholas Bellinger dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); 4726708bb27SAndy Grover if (!dev) { 473c66ac9dbSNicholas Bellinger scsi_device_put(sd); 474c66ac9dbSNicholas Bellinger return NULL; 475c66ac9dbSNicholas Bellinger } 4766708bb27SAndy Grover pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", 477c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 478c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 479c66ac9dbSNicholas Bellinger 480c66ac9dbSNicholas Bellinger return dev; 481c66ac9dbSNicholas Bellinger } 482c66ac9dbSNicholas Bellinger 483c66ac9dbSNicholas Bellinger /* 484c66ac9dbSNicholas Bellinger *Called with struct Scsi_Host->host_lock called. 485c66ac9dbSNicholas Bellinger */ 486c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_type_other( 487c66ac9dbSNicholas Bellinger struct scsi_device *sd, 488c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 489c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 490c66ac9dbSNicholas Bellinger struct se_hba *hba) 4915dd7ed2eSDan Carpenter __releases(sh->host_lock) 492c66ac9dbSNicholas Bellinger { 493c66ac9dbSNicholas Bellinger struct se_device *dev; 4948359cf43SJörn Engel struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; 495c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 496c66ac9dbSNicholas Bellinger u32 dev_flags = 0; 497c66ac9dbSNicholas Bellinger 498c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 499c66ac9dbSNicholas Bellinger dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); 5006708bb27SAndy Grover if (!dev) 501c66ac9dbSNicholas Bellinger return NULL; 502c66ac9dbSNicholas Bellinger 5036708bb27SAndy Grover pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", 504c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 505c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 506c66ac9dbSNicholas Bellinger 507c66ac9dbSNicholas Bellinger return dev; 508c66ac9dbSNicholas Bellinger } 509c66ac9dbSNicholas Bellinger 510c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_virtdevice( 511c66ac9dbSNicholas Bellinger struct se_hba *hba, 512c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 513c66ac9dbSNicholas Bellinger void *p) 514c66ac9dbSNicholas Bellinger { 5158359cf43SJörn Engel struct pscsi_dev_virt *pdv = p; 516c66ac9dbSNicholas Bellinger struct se_device *dev; 517c66ac9dbSNicholas Bellinger struct scsi_device *sd; 5188359cf43SJörn Engel struct pscsi_hba_virt *phv = hba->hba_ptr; 519c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 520c66ac9dbSNicholas Bellinger int legacy_mode_enable = 0; 521c66ac9dbSNicholas Bellinger 5226708bb27SAndy Grover if (!pdv) { 5236708bb27SAndy Grover pr_err("Unable to locate struct pscsi_dev_virt" 524c66ac9dbSNicholas Bellinger " parameter\n"); 525613640e4SNicholas Bellinger return ERR_PTR(-EINVAL); 526c66ac9dbSNicholas Bellinger } 527c66ac9dbSNicholas Bellinger /* 528c66ac9dbSNicholas Bellinger * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the 529c66ac9dbSNicholas Bellinger * struct Scsi_Host we will need to bring the TCM/pSCSI object online 530c66ac9dbSNicholas Bellinger */ 5316708bb27SAndy Grover if (!sh) { 532c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 5336708bb27SAndy Grover pr_err("pSCSI: Unable to locate struct" 534c66ac9dbSNicholas Bellinger " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); 535613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 536c66ac9dbSNicholas Bellinger } 537c66ac9dbSNicholas Bellinger /* 538e6a8a41aSStefan Hajnoczi * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device 539c66ac9dbSNicholas Bellinger * reference, we enforce that udev_path has been set 540c66ac9dbSNicholas Bellinger */ 541c66ac9dbSNicholas Bellinger if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) { 5426708bb27SAndy Grover pr_err("pSCSI: udev_path attribute has not" 543c66ac9dbSNicholas Bellinger " been set before ENABLE=1\n"); 544613640e4SNicholas Bellinger return ERR_PTR(-EINVAL); 545c66ac9dbSNicholas Bellinger } 546c66ac9dbSNicholas Bellinger /* 547e6a8a41aSStefan Hajnoczi * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID, 548c66ac9dbSNicholas Bellinger * use the original TCM hba ID to reference Linux/SCSI Host No 549c66ac9dbSNicholas Bellinger * and enable for PHV_LLD_SCSI_HOST_NO mode. 550c66ac9dbSNicholas Bellinger */ 551c66ac9dbSNicholas Bellinger if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { 552c66ac9dbSNicholas Bellinger spin_lock(&hba->device_lock); 5536708bb27SAndy Grover if (!list_empty(&hba->hba_dev_list)) { 5546708bb27SAndy Grover pr_err("pSCSI: Unable to set hba_mode" 555c66ac9dbSNicholas Bellinger " with active devices\n"); 556c66ac9dbSNicholas Bellinger spin_unlock(&hba->device_lock); 557613640e4SNicholas Bellinger return ERR_PTR(-EEXIST); 558c66ac9dbSNicholas Bellinger } 559c66ac9dbSNicholas Bellinger spin_unlock(&hba->device_lock); 560c66ac9dbSNicholas Bellinger 561c66ac9dbSNicholas Bellinger if (pscsi_pmode_enable_hba(hba, 1) != 1) 562613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 563c66ac9dbSNicholas Bellinger 564c66ac9dbSNicholas Bellinger legacy_mode_enable = 1; 565c66ac9dbSNicholas Bellinger hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 566c66ac9dbSNicholas Bellinger sh = phv->phv_lld_host; 567c66ac9dbSNicholas Bellinger } else { 568e3d6f909SAndy Grover sh = scsi_host_lookup(pdv->pdv_host_id); 569e3d6f909SAndy Grover if (IS_ERR(sh)) { 5706708bb27SAndy Grover pr_err("pSCSI: Unable to locate" 571c66ac9dbSNicholas Bellinger " pdv_host_id: %d\n", pdv->pdv_host_id); 572942d8264SDan Carpenter return ERR_CAST(sh); 573c66ac9dbSNicholas Bellinger } 574c66ac9dbSNicholas Bellinger } 575c66ac9dbSNicholas Bellinger } else { 576e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) { 577e6a8a41aSStefan Hajnoczi pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while" 578c66ac9dbSNicholas Bellinger " struct Scsi_Host exists\n"); 579613640e4SNicholas Bellinger return ERR_PTR(-EEXIST); 580c66ac9dbSNicholas Bellinger } 581c66ac9dbSNicholas Bellinger } 582c66ac9dbSNicholas Bellinger 583c66ac9dbSNicholas Bellinger spin_lock_irq(sh->host_lock); 584c66ac9dbSNicholas Bellinger list_for_each_entry(sd, &sh->__devices, siblings) { 585c66ac9dbSNicholas Bellinger if ((pdv->pdv_channel_id != sd->channel) || 586c66ac9dbSNicholas Bellinger (pdv->pdv_target_id != sd->id) || 587c66ac9dbSNicholas Bellinger (pdv->pdv_lun_id != sd->lun)) 588c66ac9dbSNicholas Bellinger continue; 589c66ac9dbSNicholas Bellinger /* 590c66ac9dbSNicholas Bellinger * Functions will release the held struct scsi_host->host_lock 591c66ac9dbSNicholas Bellinger * before calling calling pscsi_add_device_to_list() to register 592c66ac9dbSNicholas Bellinger * struct scsi_device with target_core_mod. 593c66ac9dbSNicholas Bellinger */ 594c66ac9dbSNicholas Bellinger switch (sd->type) { 595c66ac9dbSNicholas Bellinger case TYPE_DISK: 596c66ac9dbSNicholas Bellinger dev = pscsi_create_type_disk(sd, pdv, se_dev, hba); 597c66ac9dbSNicholas Bellinger break; 598c66ac9dbSNicholas Bellinger case TYPE_ROM: 599c66ac9dbSNicholas Bellinger dev = pscsi_create_type_rom(sd, pdv, se_dev, hba); 600c66ac9dbSNicholas Bellinger break; 601c66ac9dbSNicholas Bellinger default: 602c66ac9dbSNicholas Bellinger dev = pscsi_create_type_other(sd, pdv, se_dev, hba); 603c66ac9dbSNicholas Bellinger break; 604c66ac9dbSNicholas Bellinger } 605c66ac9dbSNicholas Bellinger 6066708bb27SAndy Grover if (!dev) { 607e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 608c66ac9dbSNicholas Bellinger scsi_host_put(sh); 609c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 610c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 611c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 612c66ac9dbSNicholas Bellinger } 613c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 614613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 615c66ac9dbSNicholas Bellinger } 616c66ac9dbSNicholas Bellinger return dev; 617c66ac9dbSNicholas Bellinger } 618c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 619c66ac9dbSNicholas Bellinger 6206708bb27SAndy Grover pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, 621c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); 622c66ac9dbSNicholas Bellinger 623e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 624c66ac9dbSNicholas Bellinger scsi_host_put(sh); 625c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 626c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 627c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 628c66ac9dbSNicholas Bellinger } 629c66ac9dbSNicholas Bellinger 630613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 631c66ac9dbSNicholas Bellinger } 632c66ac9dbSNicholas Bellinger 633c66ac9dbSNicholas Bellinger /* pscsi_free_device(): (Part of se_subsystem_api_t template) 634c66ac9dbSNicholas Bellinger * 635c66ac9dbSNicholas Bellinger * 636c66ac9dbSNicholas Bellinger */ 637c66ac9dbSNicholas Bellinger static void pscsi_free_device(void *p) 638c66ac9dbSNicholas Bellinger { 639c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = p; 640c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; 641c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 642c66ac9dbSNicholas Bellinger 643c66ac9dbSNicholas Bellinger if (sd) { 644c66ac9dbSNicholas Bellinger /* 645c66ac9dbSNicholas Bellinger * Release exclusive pSCSI internal struct block_device claim for 646c66ac9dbSNicholas Bellinger * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() 647c66ac9dbSNicholas Bellinger */ 648c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { 649c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, 650c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL); 651c66ac9dbSNicholas Bellinger pdv->pdv_bd = NULL; 652c66ac9dbSNicholas Bellinger } 653c66ac9dbSNicholas Bellinger /* 654c66ac9dbSNicholas Bellinger * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference 655c66ac9dbSNicholas Bellinger * to struct Scsi_Host now. 656c66ac9dbSNicholas Bellinger */ 657c66ac9dbSNicholas Bellinger if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && 658c66ac9dbSNicholas Bellinger (phv->phv_lld_host != NULL)) 659c66ac9dbSNicholas Bellinger scsi_host_put(phv->phv_lld_host); 660c66ac9dbSNicholas Bellinger 661c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) 662c66ac9dbSNicholas Bellinger scsi_device_put(sd); 663c66ac9dbSNicholas Bellinger 664c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 665c66ac9dbSNicholas Bellinger } 666c66ac9dbSNicholas Bellinger 667c66ac9dbSNicholas Bellinger kfree(pdv); 668c66ac9dbSNicholas Bellinger } 669c66ac9dbSNicholas Bellinger 6705787cacdSChristoph Hellwig static int pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg) 671c66ac9dbSNicholas Bellinger { 6725787cacdSChristoph Hellwig struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr; 673c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 674c66ac9dbSNicholas Bellinger int result; 6755787cacdSChristoph Hellwig struct pscsi_plugin_task *pt = cmd->priv; 6761d2a2cd9SNicholas Bellinger unsigned char *cdb; 6771d2a2cd9SNicholas Bellinger /* 6781d2a2cd9SNicholas Bellinger * Special case for REPORT_LUNs handling where pscsi_plugin_task has 6791d2a2cd9SNicholas Bellinger * not been allocated because TCM is handling the emulation directly. 6801d2a2cd9SNicholas Bellinger */ 6811d2a2cd9SNicholas Bellinger if (!pt) 6821d2a2cd9SNicholas Bellinger return 0; 683c66ac9dbSNicholas Bellinger 6841d2a2cd9SNicholas Bellinger cdb = &pt->pscsi_cdb[0]; 685c66ac9dbSNicholas Bellinger result = pt->pscsi_result; 686c66ac9dbSNicholas Bellinger /* 687c66ac9dbSNicholas Bellinger * Hack to make sure that Write-Protect modepage is set if R/O mode is 688c66ac9dbSNicholas Bellinger * forced. 689c66ac9dbSNicholas Bellinger */ 690c66ac9dbSNicholas Bellinger if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && 691c66ac9dbSNicholas Bellinger (status_byte(result) << 1) == SAM_STAT_GOOD) { 6925787cacdSChristoph Hellwig if (!cmd->se_deve) 693c66ac9dbSNicholas Bellinger goto after_mode_sense; 694c66ac9dbSNicholas Bellinger 6955787cacdSChristoph Hellwig if (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) { 6965787cacdSChristoph Hellwig unsigned char *buf = transport_kmap_data_sg(cmd); 697c66ac9dbSNicholas Bellinger 698c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SENSE_10) { 699c66ac9dbSNicholas Bellinger if (!(buf[3] & 0x80)) 700c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 701c66ac9dbSNicholas Bellinger } else { 702c66ac9dbSNicholas Bellinger if (!(buf[2] & 0x80)) 703c66ac9dbSNicholas Bellinger buf[2] |= 0x80; 704c66ac9dbSNicholas Bellinger } 70505d1c7c0SAndy Grover 7065787cacdSChristoph Hellwig transport_kunmap_data_sg(cmd); 707c66ac9dbSNicholas Bellinger } 708c66ac9dbSNicholas Bellinger } 709c66ac9dbSNicholas Bellinger after_mode_sense: 710c66ac9dbSNicholas Bellinger 711c66ac9dbSNicholas Bellinger if (sd->type != TYPE_TAPE) 712c66ac9dbSNicholas Bellinger goto after_mode_select; 713c66ac9dbSNicholas Bellinger 714c66ac9dbSNicholas Bellinger /* 715c66ac9dbSNicholas Bellinger * Hack to correctly obtain the initiator requested blocksize for 716c66ac9dbSNicholas Bellinger * TYPE_TAPE. Since this value is dependent upon each tape media, 717c66ac9dbSNicholas Bellinger * struct scsi_device->sector_size will not contain the correct value 718c66ac9dbSNicholas Bellinger * by default, so we go ahead and set it so 719c66ac9dbSNicholas Bellinger * TRANSPORT(dev)->get_blockdev() returns the correct value to the 720c66ac9dbSNicholas Bellinger * storage engine. 721c66ac9dbSNicholas Bellinger */ 722c66ac9dbSNicholas Bellinger if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && 723c66ac9dbSNicholas Bellinger (status_byte(result) << 1) == SAM_STAT_GOOD) { 724c66ac9dbSNicholas Bellinger unsigned char *buf; 725c66ac9dbSNicholas Bellinger u16 bdl; 726c66ac9dbSNicholas Bellinger u32 blocksize; 727c66ac9dbSNicholas Bellinger 728c66ac9dbSNicholas Bellinger buf = sg_virt(&sg[0]); 7296708bb27SAndy Grover if (!buf) { 7306708bb27SAndy Grover pr_err("Unable to get buf for scatterlist\n"); 731c66ac9dbSNicholas Bellinger goto after_mode_select; 732c66ac9dbSNicholas Bellinger } 733c66ac9dbSNicholas Bellinger 734c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 735c66ac9dbSNicholas Bellinger bdl = (buf[3]); 736c66ac9dbSNicholas Bellinger else 737c66ac9dbSNicholas Bellinger bdl = (buf[6] << 8) | (buf[7]); 738c66ac9dbSNicholas Bellinger 739c66ac9dbSNicholas Bellinger if (!bdl) 740c66ac9dbSNicholas Bellinger goto after_mode_select; 741c66ac9dbSNicholas Bellinger 742c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 743c66ac9dbSNicholas Bellinger blocksize = (buf[9] << 16) | (buf[10] << 8) | 744c66ac9dbSNicholas Bellinger (buf[11]); 745c66ac9dbSNicholas Bellinger else 746c66ac9dbSNicholas Bellinger blocksize = (buf[13] << 16) | (buf[14] << 8) | 747c66ac9dbSNicholas Bellinger (buf[15]); 748c66ac9dbSNicholas Bellinger 749c66ac9dbSNicholas Bellinger sd->sector_size = blocksize; 750c66ac9dbSNicholas Bellinger } 751c66ac9dbSNicholas Bellinger after_mode_select: 752c66ac9dbSNicholas Bellinger 753c66ac9dbSNicholas Bellinger if (status_byte(result) & CHECK_CONDITION) 754c66ac9dbSNicholas Bellinger return 1; 755c66ac9dbSNicholas Bellinger 756c66ac9dbSNicholas Bellinger return 0; 757c66ac9dbSNicholas Bellinger } 758c66ac9dbSNicholas Bellinger 759c66ac9dbSNicholas Bellinger enum { 760c66ac9dbSNicholas Bellinger Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, 761c66ac9dbSNicholas Bellinger Opt_scsi_lun_id, Opt_err 762c66ac9dbSNicholas Bellinger }; 763c66ac9dbSNicholas Bellinger 764c66ac9dbSNicholas Bellinger static match_table_t tokens = { 765c66ac9dbSNicholas Bellinger {Opt_scsi_host_id, "scsi_host_id=%d"}, 766c66ac9dbSNicholas Bellinger {Opt_scsi_channel_id, "scsi_channel_id=%d"}, 767c66ac9dbSNicholas Bellinger {Opt_scsi_target_id, "scsi_target_id=%d"}, 768c66ac9dbSNicholas Bellinger {Opt_scsi_lun_id, "scsi_lun_id=%d"}, 769c66ac9dbSNicholas Bellinger {Opt_err, NULL} 770c66ac9dbSNicholas Bellinger }; 771c66ac9dbSNicholas Bellinger 772c66ac9dbSNicholas Bellinger static ssize_t pscsi_set_configfs_dev_params(struct se_hba *hba, 773c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 774c66ac9dbSNicholas Bellinger const char *page, 775c66ac9dbSNicholas Bellinger ssize_t count) 776c66ac9dbSNicholas Bellinger { 777c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; 778c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 779c66ac9dbSNicholas Bellinger char *orig, *ptr, *opts; 780c66ac9dbSNicholas Bellinger substring_t args[MAX_OPT_ARGS]; 781c66ac9dbSNicholas Bellinger int ret = 0, arg, token; 782c66ac9dbSNicholas Bellinger 783c66ac9dbSNicholas Bellinger opts = kstrdup(page, GFP_KERNEL); 784c66ac9dbSNicholas Bellinger if (!opts) 785c66ac9dbSNicholas Bellinger return -ENOMEM; 786c66ac9dbSNicholas Bellinger 787c66ac9dbSNicholas Bellinger orig = opts; 788c66ac9dbSNicholas Bellinger 78990c161b6SSebastian Andrzej Siewior while ((ptr = strsep(&opts, ",\n")) != NULL) { 790c66ac9dbSNicholas Bellinger if (!*ptr) 791c66ac9dbSNicholas Bellinger continue; 792c66ac9dbSNicholas Bellinger 793c66ac9dbSNicholas Bellinger token = match_token(ptr, tokens, args); 794c66ac9dbSNicholas Bellinger switch (token) { 795c66ac9dbSNicholas Bellinger case Opt_scsi_host_id: 796c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 7976708bb27SAndy Grover pr_err("PSCSI[%d]: Unable to accept" 798c66ac9dbSNicholas Bellinger " scsi_host_id while phv_mode ==" 799c66ac9dbSNicholas Bellinger " PHV_LLD_SCSI_HOST_NO\n", 800c66ac9dbSNicholas Bellinger phv->phv_host_id); 801c66ac9dbSNicholas Bellinger ret = -EINVAL; 802c66ac9dbSNicholas Bellinger goto out; 803c66ac9dbSNicholas Bellinger } 804c66ac9dbSNicholas Bellinger match_int(args, &arg); 805c66ac9dbSNicholas Bellinger pdv->pdv_host_id = arg; 8066708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Host ID:" 807c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_host_id); 808c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; 809c66ac9dbSNicholas Bellinger break; 810c66ac9dbSNicholas Bellinger case Opt_scsi_channel_id: 811c66ac9dbSNicholas Bellinger match_int(args, &arg); 812c66ac9dbSNicholas Bellinger pdv->pdv_channel_id = arg; 8136708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Channel" 814c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 815c66ac9dbSNicholas Bellinger pdv->pdv_channel_id); 816c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; 817c66ac9dbSNicholas Bellinger break; 818c66ac9dbSNicholas Bellinger case Opt_scsi_target_id: 819c66ac9dbSNicholas Bellinger match_int(args, &arg); 820c66ac9dbSNicholas Bellinger pdv->pdv_target_id = arg; 8216708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Target" 822c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 823c66ac9dbSNicholas Bellinger pdv->pdv_target_id); 824c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_TARGET_ID; 825c66ac9dbSNicholas Bellinger break; 826c66ac9dbSNicholas Bellinger case Opt_scsi_lun_id: 827c66ac9dbSNicholas Bellinger match_int(args, &arg); 828c66ac9dbSNicholas Bellinger pdv->pdv_lun_id = arg; 8296708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:" 830c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_lun_id); 831c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_LUN_ID; 832c66ac9dbSNicholas Bellinger break; 833c66ac9dbSNicholas Bellinger default: 834c66ac9dbSNicholas Bellinger break; 835c66ac9dbSNicholas Bellinger } 836c66ac9dbSNicholas Bellinger } 837c66ac9dbSNicholas Bellinger 838c66ac9dbSNicholas Bellinger out: 839c66ac9dbSNicholas Bellinger kfree(orig); 840c66ac9dbSNicholas Bellinger return (!ret) ? count : ret; 841c66ac9dbSNicholas Bellinger } 842c66ac9dbSNicholas Bellinger 843c66ac9dbSNicholas Bellinger static ssize_t pscsi_check_configfs_dev_params( 844c66ac9dbSNicholas Bellinger struct se_hba *hba, 845c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev) 846c66ac9dbSNicholas Bellinger { 847c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; 848c66ac9dbSNicholas Bellinger 849c66ac9dbSNicholas Bellinger if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || 850c66ac9dbSNicholas Bellinger !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || 851c66ac9dbSNicholas Bellinger !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { 8526708bb27SAndy Grover pr_err("Missing scsi_channel_id=, scsi_target_id= and" 853c66ac9dbSNicholas Bellinger " scsi_lun_id= parameters\n"); 854e3d6f909SAndy Grover return -EINVAL; 855c66ac9dbSNicholas Bellinger } 856c66ac9dbSNicholas Bellinger 857c66ac9dbSNicholas Bellinger return 0; 858c66ac9dbSNicholas Bellinger } 859c66ac9dbSNicholas Bellinger 860c66ac9dbSNicholas Bellinger static ssize_t pscsi_show_configfs_dev_params(struct se_hba *hba, 861c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 862c66ac9dbSNicholas Bellinger char *b) 863c66ac9dbSNicholas Bellinger { 864c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 865c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; 866c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 867c66ac9dbSNicholas Bellinger unsigned char host_id[16]; 868c66ac9dbSNicholas Bellinger ssize_t bl; 869c66ac9dbSNicholas Bellinger int i; 870c66ac9dbSNicholas Bellinger 871e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 872c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "%d", pdv->pdv_host_id); 873c66ac9dbSNicholas Bellinger else 874c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "PHBA Mode"); 875c66ac9dbSNicholas Bellinger 876c66ac9dbSNicholas Bellinger bl = sprintf(b, "SCSI Device Bus Location:" 877c66ac9dbSNicholas Bellinger " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", 878c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, 879c66ac9dbSNicholas Bellinger host_id); 880c66ac9dbSNicholas Bellinger 881c66ac9dbSNicholas Bellinger if (sd) { 882c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 883c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "Vendor: "); 884c66ac9dbSNicholas Bellinger for (i = 0; i < 8; i++) { 885c66ac9dbSNicholas Bellinger if (ISPRINT(sd->vendor[i])) /* printable character? */ 886c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->vendor[i]); 887c66ac9dbSNicholas Bellinger else 888c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 889c66ac9dbSNicholas Bellinger } 890c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Model: "); 891c66ac9dbSNicholas Bellinger for (i = 0; i < 16; i++) { 892c66ac9dbSNicholas Bellinger if (ISPRINT(sd->model[i])) /* printable character ? */ 893c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->model[i]); 894c66ac9dbSNicholas Bellinger else 895c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 896c66ac9dbSNicholas Bellinger } 897c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Rev: "); 898c66ac9dbSNicholas Bellinger for (i = 0; i < 4; i++) { 899c66ac9dbSNicholas Bellinger if (ISPRINT(sd->rev[i])) /* printable character ? */ 900c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->rev[i]); 901c66ac9dbSNicholas Bellinger else 902c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 903c66ac9dbSNicholas Bellinger } 904c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "\n"); 905c66ac9dbSNicholas Bellinger } 906c66ac9dbSNicholas Bellinger return bl; 907c66ac9dbSNicholas Bellinger } 908c66ac9dbSNicholas Bellinger 909c66ac9dbSNicholas Bellinger static void pscsi_bi_endio(struct bio *bio, int error) 910c66ac9dbSNicholas Bellinger { 911c66ac9dbSNicholas Bellinger bio_put(bio); 912c66ac9dbSNicholas Bellinger } 913c66ac9dbSNicholas Bellinger 914a1d8b49aSAndy Grover static inline struct bio *pscsi_get_bio(int sg_num) 915c66ac9dbSNicholas Bellinger { 916c66ac9dbSNicholas Bellinger struct bio *bio; 917c66ac9dbSNicholas Bellinger /* 918c66ac9dbSNicholas Bellinger * Use bio_malloc() following the comment in for bio -> struct request 919c66ac9dbSNicholas Bellinger * in block/blk-core.c:blk_make_request() 920c66ac9dbSNicholas Bellinger */ 921c66ac9dbSNicholas Bellinger bio = bio_kmalloc(GFP_KERNEL, sg_num); 9226708bb27SAndy Grover if (!bio) { 9236708bb27SAndy Grover pr_err("PSCSI: bio_kmalloc() failed\n"); 924c66ac9dbSNicholas Bellinger return NULL; 925c66ac9dbSNicholas Bellinger } 926c66ac9dbSNicholas Bellinger bio->bi_end_io = pscsi_bi_endio; 927c66ac9dbSNicholas Bellinger 928c66ac9dbSNicholas Bellinger return bio; 929c66ac9dbSNicholas Bellinger } 930c66ac9dbSNicholas Bellinger 9315787cacdSChristoph Hellwig static int pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, 9325787cacdSChristoph Hellwig u32 sgl_nents, enum dma_data_direction data_direction, 93302b1a746SChristoph Hellwig struct bio **hbio) 934c66ac9dbSNicholas Bellinger { 9355787cacdSChristoph Hellwig struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr; 93602b1a746SChristoph Hellwig struct bio *bio = NULL, *tbio = NULL; 937c66ac9dbSNicholas Bellinger struct page *page; 938c66ac9dbSNicholas Bellinger struct scatterlist *sg; 9397a83aa4eSChristoph Hellwig u32 data_len = cmd->data_length, i, len, bytes, off; 9405787cacdSChristoph Hellwig int nr_pages = (cmd->data_length + sgl[0].offset + 941c66ac9dbSNicholas Bellinger PAGE_SIZE - 1) >> PAGE_SHIFT; 94203e98c9eSNicholas Bellinger int nr_vecs = 0, rc; 9435787cacdSChristoph Hellwig int rw = (data_direction == DMA_TO_DEVICE); 944c66ac9dbSNicholas Bellinger 94502b1a746SChristoph Hellwig *hbio = NULL; 94602b1a746SChristoph Hellwig 9476708bb27SAndy Grover pr_debug("PSCSI: nr_pages: %d\n", nr_pages); 948c66ac9dbSNicholas Bellinger 9495787cacdSChristoph Hellwig for_each_sg(sgl, sg, sgl_nents, i) { 950c66ac9dbSNicholas Bellinger page = sg_page(sg); 951c66ac9dbSNicholas Bellinger off = sg->offset; 952c66ac9dbSNicholas Bellinger len = sg->length; 953c66ac9dbSNicholas Bellinger 9546708bb27SAndy Grover pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i, 955c66ac9dbSNicholas Bellinger page, len, off); 956c66ac9dbSNicholas Bellinger 957c66ac9dbSNicholas Bellinger while (len > 0 && data_len > 0) { 958c66ac9dbSNicholas Bellinger bytes = min_t(unsigned int, len, PAGE_SIZE - off); 959c66ac9dbSNicholas Bellinger bytes = min(bytes, data_len); 960c66ac9dbSNicholas Bellinger 9616708bb27SAndy Grover if (!bio) { 962c66ac9dbSNicholas Bellinger nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); 963c66ac9dbSNicholas Bellinger nr_pages -= nr_vecs; 964c66ac9dbSNicholas Bellinger /* 965c66ac9dbSNicholas Bellinger * Calls bio_kmalloc() and sets bio->bi_end_io() 966c66ac9dbSNicholas Bellinger */ 967a1d8b49aSAndy Grover bio = pscsi_get_bio(nr_vecs); 9686708bb27SAndy Grover if (!bio) 969c66ac9dbSNicholas Bellinger goto fail; 970c66ac9dbSNicholas Bellinger 971c66ac9dbSNicholas Bellinger if (rw) 972c66ac9dbSNicholas Bellinger bio->bi_rw |= REQ_WRITE; 973c66ac9dbSNicholas Bellinger 9746708bb27SAndy Grover pr_debug("PSCSI: Allocated bio: %p," 975c66ac9dbSNicholas Bellinger " dir: %s nr_vecs: %d\n", bio, 976c66ac9dbSNicholas Bellinger (rw) ? "rw" : "r", nr_vecs); 977c66ac9dbSNicholas Bellinger /* 978c66ac9dbSNicholas Bellinger * Set *hbio pointer to handle the case: 979c66ac9dbSNicholas Bellinger * nr_pages > BIO_MAX_PAGES, where additional 980c66ac9dbSNicholas Bellinger * bios need to be added to complete a given 9815787cacdSChristoph Hellwig * command. 982c66ac9dbSNicholas Bellinger */ 98302b1a746SChristoph Hellwig if (!*hbio) 98402b1a746SChristoph Hellwig *hbio = tbio = bio; 985c66ac9dbSNicholas Bellinger else 986c66ac9dbSNicholas Bellinger tbio = tbio->bi_next = bio; 987c66ac9dbSNicholas Bellinger } 988c66ac9dbSNicholas Bellinger 9896708bb27SAndy Grover pr_debug("PSCSI: Calling bio_add_pc_page() i: %d" 990c66ac9dbSNicholas Bellinger " bio: %p page: %p len: %d off: %d\n", i, bio, 991c66ac9dbSNicholas Bellinger page, len, off); 992c66ac9dbSNicholas Bellinger 993c66ac9dbSNicholas Bellinger rc = bio_add_pc_page(pdv->pdv_sd->request_queue, 994c66ac9dbSNicholas Bellinger bio, page, bytes, off); 995c66ac9dbSNicholas Bellinger if (rc != bytes) 996c66ac9dbSNicholas Bellinger goto fail; 997c66ac9dbSNicholas Bellinger 9986708bb27SAndy Grover pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", 999c66ac9dbSNicholas Bellinger bio->bi_vcnt, nr_vecs); 1000c66ac9dbSNicholas Bellinger 1001c66ac9dbSNicholas Bellinger if (bio->bi_vcnt > nr_vecs) { 10026708bb27SAndy Grover pr_debug("PSCSI: Reached bio->bi_vcnt max:" 1003c66ac9dbSNicholas Bellinger " %d i: %d bio: %p, allocating another" 1004c66ac9dbSNicholas Bellinger " bio\n", bio->bi_vcnt, i, bio); 1005c66ac9dbSNicholas Bellinger /* 1006c66ac9dbSNicholas Bellinger * Clear the pointer so that another bio will 1007c66ac9dbSNicholas Bellinger * be allocated with pscsi_get_bio() above, the 1008c66ac9dbSNicholas Bellinger * current bio has already been set *tbio and 1009c66ac9dbSNicholas Bellinger * bio->bi_next. 1010c66ac9dbSNicholas Bellinger */ 1011c66ac9dbSNicholas Bellinger bio = NULL; 1012c66ac9dbSNicholas Bellinger } 1013c66ac9dbSNicholas Bellinger 1014c66ac9dbSNicholas Bellinger page++; 1015c66ac9dbSNicholas Bellinger len -= bytes; 1016c66ac9dbSNicholas Bellinger data_len -= bytes; 1017c66ac9dbSNicholas Bellinger off = 0; 1018c66ac9dbSNicholas Bellinger } 1019c66ac9dbSNicholas Bellinger } 1020c66ac9dbSNicholas Bellinger 10215787cacdSChristoph Hellwig return sgl_nents; 1022c66ac9dbSNicholas Bellinger fail: 102302b1a746SChristoph Hellwig while (*hbio) { 102402b1a746SChristoph Hellwig bio = *hbio; 102502b1a746SChristoph Hellwig *hbio = (*hbio)->bi_next; 1026c66ac9dbSNicholas Bellinger bio->bi_next = NULL; 102702b1a746SChristoph Hellwig bio_endio(bio, 0); /* XXX: should be error */ 1028c66ac9dbSNicholas Bellinger } 102903e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 103003e98c9eSNicholas Bellinger return -ENOMEM; 1031c66ac9dbSNicholas Bellinger } 1032c66ac9dbSNicholas Bellinger 10333d6d7201SChristoph Hellwig /* 10343d6d7201SChristoph Hellwig * Clear a lun set in the cdb if the initiator talking to use spoke 10353d6d7201SChristoph Hellwig * and old standards version, as we can't assume the underlying device 10363d6d7201SChristoph Hellwig * won't choke up on it. 10373d6d7201SChristoph Hellwig */ 10383d6d7201SChristoph Hellwig static inline void pscsi_clear_cdb_lun(unsigned char *cdb) 10393d6d7201SChristoph Hellwig { 10403d6d7201SChristoph Hellwig switch (cdb[0]) { 10413d6d7201SChristoph Hellwig case READ_10: /* SBC - RDProtect */ 10423d6d7201SChristoph Hellwig case READ_12: /* SBC - RDProtect */ 10433d6d7201SChristoph Hellwig case READ_16: /* SBC - RDProtect */ 10443d6d7201SChristoph Hellwig case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ 10453d6d7201SChristoph Hellwig case VERIFY: /* SBC - VRProtect */ 10463d6d7201SChristoph Hellwig case VERIFY_16: /* SBC - VRProtect */ 10473d6d7201SChristoph Hellwig case WRITE_VERIFY: /* SBC - VRProtect */ 10483d6d7201SChristoph Hellwig case WRITE_VERIFY_12: /* SBC - VRProtect */ 10493d6d7201SChristoph Hellwig case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */ 10503d6d7201SChristoph Hellwig break; 10513d6d7201SChristoph Hellwig default: 10523d6d7201SChristoph Hellwig cdb[1] &= 0x1f; /* clear logical unit number */ 10533d6d7201SChristoph Hellwig break; 10543d6d7201SChristoph Hellwig } 10553d6d7201SChristoph Hellwig } 10563d6d7201SChristoph Hellwig 10571fd032eeSChristoph Hellwig static int pscsi_parse_cdb(struct se_cmd *cmd) 1058d6e0175cSChristoph Hellwig { 1059d6e0175cSChristoph Hellwig unsigned char *cdb = cmd->t_task_cdb; 10601fd032eeSChristoph Hellwig unsigned int dummy_size; 1061d6e0175cSChristoph Hellwig int ret; 1062d6e0175cSChristoph Hellwig 10631fd032eeSChristoph Hellwig if (cmd->se_cmd_flags & SCF_BIDI) { 1064d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 1065d6e0175cSChristoph Hellwig cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 1066d6e0175cSChristoph Hellwig return -EINVAL; 1067d6e0175cSChristoph Hellwig } 1068d6e0175cSChristoph Hellwig 10693d6d7201SChristoph Hellwig pscsi_clear_cdb_lun(cdb); 10703d6d7201SChristoph Hellwig 10711fd032eeSChristoph Hellwig /* 1072a3785c87SNicholas Bellinger * For REPORT LUNS we always need to emulate the response, for everything 1073a3785c87SNicholas Bellinger * else the default for pSCSI is to pass the command to the underlying 1074a3785c87SNicholas Bellinger * LLD / physical hardware. 10751fd032eeSChristoph Hellwig */ 10761fd032eeSChristoph Hellwig switch (cdb[0]) { 10771fd032eeSChristoph Hellwig case REPORT_LUNS: 10781fd032eeSChristoph Hellwig ret = spc_parse_cdb(cmd, &dummy_size); 10791fd032eeSChristoph Hellwig if (ret) 10801fd032eeSChristoph Hellwig return ret; 10811fd032eeSChristoph Hellwig break; 10821fd032eeSChristoph Hellwig case READ_6: 10831fd032eeSChristoph Hellwig case READ_10: 10841fd032eeSChristoph Hellwig case READ_12: 10851fd032eeSChristoph Hellwig case READ_16: 10861fd032eeSChristoph Hellwig case WRITE_6: 10871fd032eeSChristoph Hellwig case WRITE_10: 10881fd032eeSChristoph Hellwig case WRITE_12: 10891fd032eeSChristoph Hellwig case WRITE_16: 10901fd032eeSChristoph Hellwig case WRITE_VERIFY: 10911fd032eeSChristoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 10920c2ad7d1SChristoph Hellwig /* FALLTHROUGH*/ 10931fd032eeSChristoph Hellwig default: 10940c2ad7d1SChristoph Hellwig cmd->execute_cmd = pscsi_execute_cmd; 10951fd032eeSChristoph Hellwig break; 10961fd032eeSChristoph Hellwig } 10971fd032eeSChristoph Hellwig 10981fd032eeSChristoph Hellwig return 0; 10991fd032eeSChristoph Hellwig } 1100d6e0175cSChristoph Hellwig 11010c2ad7d1SChristoph Hellwig static int pscsi_execute_cmd(struct se_cmd *cmd) 1102c66ac9dbSNicholas Bellinger { 11030c2ad7d1SChristoph Hellwig struct scatterlist *sgl = cmd->t_data_sg; 11040c2ad7d1SChristoph Hellwig u32 sgl_nents = cmd->t_data_nents; 11050c2ad7d1SChristoph Hellwig enum dma_data_direction data_direction = cmd->data_direction; 11065787cacdSChristoph Hellwig struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr; 11075787cacdSChristoph Hellwig struct pscsi_plugin_task *pt; 110802b1a746SChristoph Hellwig struct request *req; 110902b1a746SChristoph Hellwig struct bio *hbio; 1110c66ac9dbSNicholas Bellinger int ret; 1111c66ac9dbSNicholas Bellinger 11125787cacdSChristoph Hellwig /* 11135787cacdSChristoph Hellwig * Dynamically alloc cdb space, since it may be larger than 11145787cacdSChristoph Hellwig * TCM_MAX_COMMAND_SIZE 11155787cacdSChristoph Hellwig */ 11165787cacdSChristoph Hellwig pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL); 11175787cacdSChristoph Hellwig if (!pt) { 11185787cacdSChristoph Hellwig cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 11195787cacdSChristoph Hellwig return -ENOMEM; 11205787cacdSChristoph Hellwig } 11215787cacdSChristoph Hellwig cmd->priv = pt; 11225787cacdSChristoph Hellwig 1123ed3102c6SChristoph Hellwig memcpy(pt->pscsi_cdb, cmd->t_task_cdb, 1124ed3102c6SChristoph Hellwig scsi_command_size(cmd->t_task_cdb)); 1125485fd0d1SChristoph Hellwig 112664f1db38SChristoph Hellwig if (!sgl) { 112702b1a746SChristoph Hellwig req = blk_get_request(pdv->pdv_sd->request_queue, 11285787cacdSChristoph Hellwig (data_direction == DMA_TO_DEVICE), 112902b1a746SChristoph Hellwig GFP_KERNEL); 113002b1a746SChristoph Hellwig if (!req || IS_ERR(req)) { 113102b1a746SChristoph Hellwig pr_err("PSCSI: blk_get_request() failed: %ld\n", 113202b1a746SChristoph Hellwig req ? IS_ERR(req) : -ENOMEM); 113303e98c9eSNicholas Bellinger cmd->scsi_sense_reason = 113403e98c9eSNicholas Bellinger TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 11355787cacdSChristoph Hellwig goto fail; 113602b1a746SChristoph Hellwig } 113702b1a746SChristoph Hellwig } else { 11387a83aa4eSChristoph Hellwig BUG_ON(!cmd->data_length); 113902b1a746SChristoph Hellwig 11405787cacdSChristoph Hellwig ret = pscsi_map_sg(cmd, sgl, sgl_nents, data_direction, &hbio); 114103e98c9eSNicholas Bellinger if (ret < 0) { 114203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = 114303e98c9eSNicholas Bellinger TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 11445787cacdSChristoph Hellwig goto fail; 114503e98c9eSNicholas Bellinger } 1146c66ac9dbSNicholas Bellinger 114702b1a746SChristoph Hellwig req = blk_make_request(pdv->pdv_sd->request_queue, hbio, 114802b1a746SChristoph Hellwig GFP_KERNEL); 1149ed327ed3SDan Carpenter if (IS_ERR(req)) { 115002b1a746SChristoph Hellwig pr_err("pSCSI: blk_make_request() failed\n"); 11515787cacdSChristoph Hellwig goto fail_free_bio; 115202b1a746SChristoph Hellwig } 115302b1a746SChristoph Hellwig } 115402b1a746SChristoph Hellwig 115502b1a746SChristoph Hellwig req->cmd_type = REQ_TYPE_BLOCK_PC; 115602b1a746SChristoph Hellwig req->end_io = pscsi_req_done; 11575787cacdSChristoph Hellwig req->end_io_data = cmd; 115802b1a746SChristoph Hellwig req->cmd_len = scsi_command_size(pt->pscsi_cdb); 115902b1a746SChristoph Hellwig req->cmd = &pt->pscsi_cdb[0]; 116002b1a746SChristoph Hellwig req->sense = &pt->pscsi_sense[0]; 116102b1a746SChristoph Hellwig req->sense_len = 0; 116202b1a746SChristoph Hellwig if (pdv->pdv_sd->type == TYPE_DISK) 116302b1a746SChristoph Hellwig req->timeout = PS_TIMEOUT_DISK; 116402b1a746SChristoph Hellwig else 116502b1a746SChristoph Hellwig req->timeout = PS_TIMEOUT_OTHER; 116602b1a746SChristoph Hellwig req->retries = PS_RETRY; 116702b1a746SChristoph Hellwig 116802b1a746SChristoph Hellwig blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, 11695787cacdSChristoph Hellwig (cmd->sam_task_attr == MSG_HEAD_TAG), 117002b1a746SChristoph Hellwig pscsi_req_done); 117102b1a746SChristoph Hellwig 117203e98c9eSNicholas Bellinger return 0; 117302b1a746SChristoph Hellwig 11745787cacdSChristoph Hellwig fail_free_bio: 117502b1a746SChristoph Hellwig while (hbio) { 117602b1a746SChristoph Hellwig struct bio *bio = hbio; 117702b1a746SChristoph Hellwig hbio = hbio->bi_next; 117802b1a746SChristoph Hellwig bio->bi_next = NULL; 117902b1a746SChristoph Hellwig bio_endio(bio, 0); /* XXX: should be error */ 118002b1a746SChristoph Hellwig } 118103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 11825787cacdSChristoph Hellwig fail: 11835787cacdSChristoph Hellwig kfree(pt); 118403e98c9eSNicholas Bellinger return -ENOMEM; 118502b1a746SChristoph Hellwig } 118602b1a746SChristoph Hellwig 11875787cacdSChristoph Hellwig static unsigned char *pscsi_get_sense_buffer(struct se_cmd *cmd) 1188c66ac9dbSNicholas Bellinger { 11895787cacdSChristoph Hellwig struct pscsi_plugin_task *pt = cmd->priv; 1190c66ac9dbSNicholas Bellinger 11918359cf43SJörn Engel return pt->pscsi_sense; 1192c66ac9dbSNicholas Bellinger } 1193c66ac9dbSNicholas Bellinger 1194c66ac9dbSNicholas Bellinger /* pscsi_get_device_rev(): 1195c66ac9dbSNicholas Bellinger * 1196c66ac9dbSNicholas Bellinger * 1197c66ac9dbSNicholas Bellinger */ 1198c66ac9dbSNicholas Bellinger static u32 pscsi_get_device_rev(struct se_device *dev) 1199c66ac9dbSNicholas Bellinger { 1200c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = dev->dev_ptr; 1201c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 1202c66ac9dbSNicholas Bellinger 1203c66ac9dbSNicholas Bellinger return (sd->scsi_level - 1) ? sd->scsi_level - 1 : 1; 1204c66ac9dbSNicholas Bellinger } 1205c66ac9dbSNicholas Bellinger 1206c66ac9dbSNicholas Bellinger /* pscsi_get_device_type(): 1207c66ac9dbSNicholas Bellinger * 1208c66ac9dbSNicholas Bellinger * 1209c66ac9dbSNicholas Bellinger */ 1210c66ac9dbSNicholas Bellinger static u32 pscsi_get_device_type(struct se_device *dev) 1211c66ac9dbSNicholas Bellinger { 1212c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = dev->dev_ptr; 1213c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 1214c66ac9dbSNicholas Bellinger 1215c66ac9dbSNicholas Bellinger return sd->type; 1216c66ac9dbSNicholas Bellinger } 1217c66ac9dbSNicholas Bellinger 1218c66ac9dbSNicholas Bellinger static sector_t pscsi_get_blocks(struct se_device *dev) 1219c66ac9dbSNicholas Bellinger { 1220c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = dev->dev_ptr; 1221c66ac9dbSNicholas Bellinger 1222c66ac9dbSNicholas Bellinger if (pdv->pdv_bd && pdv->pdv_bd->bd_part) 1223c66ac9dbSNicholas Bellinger return pdv->pdv_bd->bd_part->nr_sects; 1224c66ac9dbSNicholas Bellinger 1225c66ac9dbSNicholas Bellinger dump_stack(); 1226c66ac9dbSNicholas Bellinger return 0; 1227c66ac9dbSNicholas Bellinger } 1228c66ac9dbSNicholas Bellinger 12295787cacdSChristoph Hellwig static void pscsi_req_done(struct request *req, int uptodate) 1230c66ac9dbSNicholas Bellinger { 12315787cacdSChristoph Hellwig struct se_cmd *cmd = req->end_io_data; 12325787cacdSChristoph Hellwig struct pscsi_plugin_task *pt = cmd->priv; 12335787cacdSChristoph Hellwig 12345787cacdSChristoph Hellwig pt->pscsi_result = req->errors; 12355787cacdSChristoph Hellwig pt->pscsi_resid = req->resid_len; 12365787cacdSChristoph Hellwig 12375787cacdSChristoph Hellwig cmd->scsi_status = status_byte(pt->pscsi_result) << 1; 12385787cacdSChristoph Hellwig if (cmd->scsi_status) { 12395787cacdSChristoph Hellwig pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" 12405787cacdSChristoph Hellwig " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], 1241c66ac9dbSNicholas Bellinger pt->pscsi_result); 1242c66ac9dbSNicholas Bellinger } 1243c66ac9dbSNicholas Bellinger 1244c66ac9dbSNicholas Bellinger switch (host_byte(pt->pscsi_result)) { 1245c66ac9dbSNicholas Bellinger case DID_OK: 12465787cacdSChristoph Hellwig target_complete_cmd(cmd, cmd->scsi_status); 1247c66ac9dbSNicholas Bellinger break; 1248c66ac9dbSNicholas Bellinger default: 12495787cacdSChristoph Hellwig pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" 12505787cacdSChristoph Hellwig " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], 1251c66ac9dbSNicholas Bellinger pt->pscsi_result); 12525787cacdSChristoph Hellwig cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 12535787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); 1254c66ac9dbSNicholas Bellinger break; 1255c66ac9dbSNicholas Bellinger } 1256c66ac9dbSNicholas Bellinger 1257c66ac9dbSNicholas Bellinger __blk_put_request(req->q, req); 12585787cacdSChristoph Hellwig kfree(pt); 1259c66ac9dbSNicholas Bellinger } 1260c66ac9dbSNicholas Bellinger 1261c66ac9dbSNicholas Bellinger static struct se_subsystem_api pscsi_template = { 1262c66ac9dbSNicholas Bellinger .name = "pscsi", 1263c66ac9dbSNicholas Bellinger .owner = THIS_MODULE, 1264c66ac9dbSNicholas Bellinger .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV, 1265c66ac9dbSNicholas Bellinger .attach_hba = pscsi_attach_hba, 1266c66ac9dbSNicholas Bellinger .detach_hba = pscsi_detach_hba, 1267c66ac9dbSNicholas Bellinger .pmode_enable_hba = pscsi_pmode_enable_hba, 1268c66ac9dbSNicholas Bellinger .allocate_virtdevice = pscsi_allocate_virtdevice, 1269c66ac9dbSNicholas Bellinger .create_virtdevice = pscsi_create_virtdevice, 1270c66ac9dbSNicholas Bellinger .free_device = pscsi_free_device, 1271c66ac9dbSNicholas Bellinger .transport_complete = pscsi_transport_complete, 1272d6e0175cSChristoph Hellwig .parse_cdb = pscsi_parse_cdb, 1273c66ac9dbSNicholas Bellinger .check_configfs_dev_params = pscsi_check_configfs_dev_params, 1274c66ac9dbSNicholas Bellinger .set_configfs_dev_params = pscsi_set_configfs_dev_params, 1275c66ac9dbSNicholas Bellinger .show_configfs_dev_params = pscsi_show_configfs_dev_params, 1276c66ac9dbSNicholas Bellinger .get_sense_buffer = pscsi_get_sense_buffer, 1277c66ac9dbSNicholas Bellinger .get_device_rev = pscsi_get_device_rev, 1278c66ac9dbSNicholas Bellinger .get_device_type = pscsi_get_device_type, 1279c66ac9dbSNicholas Bellinger .get_blocks = pscsi_get_blocks, 1280c66ac9dbSNicholas Bellinger }; 1281c66ac9dbSNicholas Bellinger 1282c66ac9dbSNicholas Bellinger static int __init pscsi_module_init(void) 1283c66ac9dbSNicholas Bellinger { 1284c66ac9dbSNicholas Bellinger return transport_subsystem_register(&pscsi_template); 1285c66ac9dbSNicholas Bellinger } 1286c66ac9dbSNicholas Bellinger 1287c66ac9dbSNicholas Bellinger static void pscsi_module_exit(void) 1288c66ac9dbSNicholas Bellinger { 1289c66ac9dbSNicholas Bellinger transport_subsystem_release(&pscsi_template); 1290c66ac9dbSNicholas Bellinger } 1291c66ac9dbSNicholas Bellinger 1292c66ac9dbSNicholas Bellinger MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); 1293c66ac9dbSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 1294c66ac9dbSNicholas Bellinger MODULE_LICENSE("GPL"); 1295c66ac9dbSNicholas Bellinger 1296c66ac9dbSNicholas Bellinger module_init(pscsi_module_init); 1297c66ac9dbSNicholas Bellinger module_exit(pscsi_module_exit); 1298