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 * 64c76251eSNicholas Bellinger * (c) Copyright 2003-2013 Datera, Inc. 7c66ac9dbSNicholas Bellinger * 8c66ac9dbSNicholas Bellinger * Nicholas A. Bellinger <nab@kernel.org> 9c66ac9dbSNicholas Bellinger * 10c66ac9dbSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 11c66ac9dbSNicholas Bellinger * it under the terms of the GNU General Public License as published by 12c66ac9dbSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 13c66ac9dbSNicholas Bellinger * (at your option) any later version. 14c66ac9dbSNicholas Bellinger * 15c66ac9dbSNicholas Bellinger * This program is distributed in the hope that it will be useful, 16c66ac9dbSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 17c66ac9dbSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18c66ac9dbSNicholas Bellinger * GNU General Public License for more details. 19c66ac9dbSNicholas Bellinger * 20c66ac9dbSNicholas Bellinger * You should have received a copy of the GNU General Public License 21c66ac9dbSNicholas Bellinger * along with this program; if not, write to the Free Software 22c66ac9dbSNicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 23c66ac9dbSNicholas Bellinger * 24c66ac9dbSNicholas Bellinger ******************************************************************************/ 25c66ac9dbSNicholas Bellinger 26c66ac9dbSNicholas Bellinger #include <linux/string.h> 27c66ac9dbSNicholas Bellinger #include <linux/parser.h> 28c66ac9dbSNicholas Bellinger #include <linux/timer.h> 29c66ac9dbSNicholas Bellinger #include <linux/blkdev.h> 30c66ac9dbSNicholas Bellinger #include <linux/blk_types.h> 31c66ac9dbSNicholas Bellinger #include <linux/slab.h> 32c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 33c66ac9dbSNicholas Bellinger #include <linux/genhd.h> 34c66ac9dbSNicholas Bellinger #include <linux/cdrom.h> 35d6e0175cSChristoph Hellwig #include <linux/ratelimit.h> 36827509e3SPaul Gortmaker #include <linux/module.h> 37d6e0175cSChristoph Hellwig #include <asm/unaligned.h> 38d6e0175cSChristoph Hellwig 39c66ac9dbSNicholas Bellinger #include <scsi/scsi.h> 40c66ac9dbSNicholas Bellinger #include <scsi/scsi_device.h> 41c66ac9dbSNicholas Bellinger #include <scsi/scsi_cmnd.h> 42c66ac9dbSNicholas Bellinger #include <scsi/scsi_host.h> 43e66ecd50SNicholas Bellinger #include <scsi/scsi_tcq.h> 44c66ac9dbSNicholas Bellinger 45c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 46c4795fb2SChristoph Hellwig #include <target/target_core_backend.h> 476cfb546bSNicholas Bellinger #include <target/target_core_backend_configfs.h> 48c66ac9dbSNicholas Bellinger 49d6e0175cSChristoph Hellwig #include "target_core_alua.h" 5029a05deeSNicholas Bellinger #include "target_core_internal.h" 51c66ac9dbSNicholas Bellinger #include "target_core_pscsi.h" 52c66ac9dbSNicholas Bellinger 53c66ac9dbSNicholas Bellinger #define ISPRINT(a) ((a >= ' ') && (a <= '~')) 54c66ac9dbSNicholas Bellinger 550fd97ccfSChristoph Hellwig static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev) 560fd97ccfSChristoph Hellwig { 570fd97ccfSChristoph Hellwig return container_of(dev, struct pscsi_dev_virt, dev); 580fd97ccfSChristoph Hellwig } 590fd97ccfSChristoph Hellwig 60de103c93SChristoph Hellwig static sense_reason_t pscsi_execute_cmd(struct se_cmd *cmd); 61c66ac9dbSNicholas Bellinger static void pscsi_req_done(struct request *, int); 62c66ac9dbSNicholas Bellinger 63c66ac9dbSNicholas Bellinger /* pscsi_attach_hba(): 64c66ac9dbSNicholas Bellinger * 65c66ac9dbSNicholas Bellinger * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. 66c66ac9dbSNicholas Bellinger * from the passed SCSI Host ID. 67c66ac9dbSNicholas Bellinger */ 68c66ac9dbSNicholas Bellinger static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) 69c66ac9dbSNicholas Bellinger { 70c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv; 71c66ac9dbSNicholas Bellinger 72c66ac9dbSNicholas Bellinger phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); 736708bb27SAndy Grover if (!phv) { 746708bb27SAndy Grover pr_err("Unable to allocate struct pscsi_hba_virt\n"); 75e3d6f909SAndy Grover return -ENOMEM; 76c66ac9dbSNicholas Bellinger } 77c66ac9dbSNicholas Bellinger phv->phv_host_id = host_id; 78e6a8a41aSStefan Hajnoczi phv->phv_mode = PHV_VIRTUAL_HOST_ID; 79c66ac9dbSNicholas Bellinger 805951146dSAndy Grover hba->hba_ptr = phv; 81c66ac9dbSNicholas Bellinger 826708bb27SAndy Grover pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on" 83c66ac9dbSNicholas Bellinger " Generic Target Core Stack %s\n", hba->hba_id, 84c66ac9dbSNicholas Bellinger PSCSI_VERSION, TARGET_CORE_MOD_VERSION); 856708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n", 86e3d6f909SAndy Grover hba->hba_id); 87c66ac9dbSNicholas Bellinger 88c66ac9dbSNicholas Bellinger return 0; 89c66ac9dbSNicholas Bellinger } 90c66ac9dbSNicholas Bellinger 91c66ac9dbSNicholas Bellinger static void pscsi_detach_hba(struct se_hba *hba) 92c66ac9dbSNicholas Bellinger { 93c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 94c66ac9dbSNicholas Bellinger struct Scsi_Host *scsi_host = phv->phv_lld_host; 95c66ac9dbSNicholas Bellinger 96c66ac9dbSNicholas Bellinger if (scsi_host) { 97c66ac9dbSNicholas Bellinger scsi_host_put(scsi_host); 98c66ac9dbSNicholas Bellinger 996708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from" 100c66ac9dbSNicholas Bellinger " Generic Target Core\n", hba->hba_id, 101c66ac9dbSNicholas Bellinger (scsi_host->hostt->name) ? (scsi_host->hostt->name) : 102c66ac9dbSNicholas Bellinger "Unknown"); 103c66ac9dbSNicholas Bellinger } else 1046708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA" 105c66ac9dbSNicholas Bellinger " from Generic Target Core\n", hba->hba_id); 106c66ac9dbSNicholas Bellinger 107c66ac9dbSNicholas Bellinger kfree(phv); 108c66ac9dbSNicholas Bellinger hba->hba_ptr = NULL; 109c66ac9dbSNicholas Bellinger } 110c66ac9dbSNicholas Bellinger 111c66ac9dbSNicholas Bellinger static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) 112c66ac9dbSNicholas Bellinger { 1138359cf43SJörn Engel struct pscsi_hba_virt *phv = hba->hba_ptr; 114c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 115c66ac9dbSNicholas Bellinger /* 116c66ac9dbSNicholas Bellinger * Release the struct Scsi_Host 117c66ac9dbSNicholas Bellinger */ 1186708bb27SAndy Grover if (!mode_flag) { 1196708bb27SAndy Grover if (!sh) 120c66ac9dbSNicholas Bellinger return 0; 121c66ac9dbSNicholas Bellinger 122c66ac9dbSNicholas Bellinger phv->phv_lld_host = NULL; 123e6a8a41aSStefan Hajnoczi phv->phv_mode = PHV_VIRTUAL_HOST_ID; 124c66ac9dbSNicholas Bellinger 1256708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" 126c66ac9dbSNicholas Bellinger " %s\n", hba->hba_id, (sh->hostt->name) ? 127c66ac9dbSNicholas Bellinger (sh->hostt->name) : "Unknown"); 128c66ac9dbSNicholas Bellinger 129c66ac9dbSNicholas Bellinger scsi_host_put(sh); 130c66ac9dbSNicholas Bellinger return 0; 131c66ac9dbSNicholas Bellinger } 132c66ac9dbSNicholas Bellinger /* 133c66ac9dbSNicholas Bellinger * Otherwise, locate struct Scsi_Host from the original passed 134c66ac9dbSNicholas Bellinger * pSCSI Host ID and enable for phba mode 135c66ac9dbSNicholas Bellinger */ 136e3d6f909SAndy Grover sh = scsi_host_lookup(phv->phv_host_id); 13758932e96SWei Yongjun if (!sh) { 1386708bb27SAndy Grover pr_err("pSCSI: Unable to locate SCSI Host for" 139c66ac9dbSNicholas Bellinger " phv_host_id: %d\n", phv->phv_host_id); 14058932e96SWei Yongjun return -EINVAL; 141c66ac9dbSNicholas Bellinger } 142c66ac9dbSNicholas Bellinger 143c66ac9dbSNicholas Bellinger phv->phv_lld_host = sh; 144c66ac9dbSNicholas Bellinger phv->phv_mode = PHV_LLD_SCSI_HOST_NO; 145c66ac9dbSNicholas Bellinger 1466708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", 147c66ac9dbSNicholas Bellinger hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); 148c66ac9dbSNicholas Bellinger 149c66ac9dbSNicholas Bellinger return 1; 150c66ac9dbSNicholas Bellinger } 151c66ac9dbSNicholas Bellinger 152c66ac9dbSNicholas Bellinger static void pscsi_tape_read_blocksize(struct se_device *dev, 153c66ac9dbSNicholas Bellinger struct scsi_device *sdev) 154c66ac9dbSNicholas Bellinger { 155c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 156c66ac9dbSNicholas Bellinger int ret; 157c66ac9dbSNicholas Bellinger 158c66ac9dbSNicholas Bellinger buf = kzalloc(12, GFP_KERNEL); 159c66ac9dbSNicholas Bellinger if (!buf) 160c66ac9dbSNicholas Bellinger return; 161c66ac9dbSNicholas Bellinger 162c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 163c66ac9dbSNicholas Bellinger cdb[0] = MODE_SENSE; 164c66ac9dbSNicholas Bellinger cdb[4] = 0x0c; /* 12 bytes */ 165c66ac9dbSNicholas Bellinger 166c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, 167c66ac9dbSNicholas Bellinger HZ, 1, NULL); 168c66ac9dbSNicholas Bellinger if (ret) 169c66ac9dbSNicholas Bellinger goto out_free; 170c66ac9dbSNicholas Bellinger 171c66ac9dbSNicholas Bellinger /* 172c66ac9dbSNicholas Bellinger * If MODE_SENSE still returns zero, set the default value to 1024. 173c66ac9dbSNicholas Bellinger */ 174c66ac9dbSNicholas Bellinger sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); 175c66ac9dbSNicholas Bellinger if (!sdev->sector_size) 176c66ac9dbSNicholas Bellinger sdev->sector_size = 1024; 177c66ac9dbSNicholas Bellinger out_free: 178c66ac9dbSNicholas Bellinger kfree(buf); 179c66ac9dbSNicholas Bellinger } 180c66ac9dbSNicholas Bellinger 181c66ac9dbSNicholas Bellinger static void 182c66ac9dbSNicholas Bellinger pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) 183c66ac9dbSNicholas Bellinger { 184c66ac9dbSNicholas Bellinger unsigned char *buf; 185c66ac9dbSNicholas Bellinger 186c66ac9dbSNicholas Bellinger if (sdev->inquiry_len < INQUIRY_LEN) 187c66ac9dbSNicholas Bellinger return; 188c66ac9dbSNicholas Bellinger 189c66ac9dbSNicholas Bellinger buf = sdev->inquiry; 190c66ac9dbSNicholas Bellinger if (!buf) 191c66ac9dbSNicholas Bellinger return; 192c66ac9dbSNicholas Bellinger /* 193c66ac9dbSNicholas Bellinger * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() 194c66ac9dbSNicholas Bellinger */ 195c66ac9dbSNicholas Bellinger memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); 196c66ac9dbSNicholas Bellinger memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); 197c66ac9dbSNicholas Bellinger memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); 198c66ac9dbSNicholas Bellinger } 199c66ac9dbSNicholas Bellinger 200c66ac9dbSNicholas Bellinger static int 201c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) 202c66ac9dbSNicholas Bellinger { 203c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 204c66ac9dbSNicholas Bellinger int ret; 205c66ac9dbSNicholas Bellinger 206c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 207c66ac9dbSNicholas Bellinger if (!buf) 208e3d6f909SAndy Grover return -ENOMEM; 209c66ac9dbSNicholas Bellinger 210c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 211c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 212c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 213c66ac9dbSNicholas Bellinger cdb[2] = 0x80; /* Unit Serial Number */ 214c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; 215c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); 216c66ac9dbSNicholas Bellinger 217c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 218c66ac9dbSNicholas Bellinger INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); 219c66ac9dbSNicholas Bellinger if (ret) 220c66ac9dbSNicholas Bellinger goto out_free; 221c66ac9dbSNicholas Bellinger 222c66ac9dbSNicholas Bellinger snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); 223c66ac9dbSNicholas Bellinger 2240fd97ccfSChristoph Hellwig wwn->t10_dev->dev_flags |= DF_FIRMWARE_VPD_UNIT_SERIAL; 225c66ac9dbSNicholas Bellinger 226c66ac9dbSNicholas Bellinger kfree(buf); 227c66ac9dbSNicholas Bellinger return 0; 228c66ac9dbSNicholas Bellinger 229c66ac9dbSNicholas Bellinger out_free: 230c66ac9dbSNicholas Bellinger kfree(buf); 231e3d6f909SAndy Grover return -EPERM; 232c66ac9dbSNicholas Bellinger } 233c66ac9dbSNicholas Bellinger 234c66ac9dbSNicholas Bellinger static void 235c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, 236c66ac9dbSNicholas Bellinger struct t10_wwn *wwn) 237c66ac9dbSNicholas Bellinger { 238c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; 239c66ac9dbSNicholas Bellinger int ident_len, page_len, off = 4, ret; 240c66ac9dbSNicholas Bellinger struct t10_vpd *vpd; 241c66ac9dbSNicholas Bellinger 242c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 243c66ac9dbSNicholas Bellinger if (!buf) 244c66ac9dbSNicholas Bellinger return; 245c66ac9dbSNicholas Bellinger 246c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 247c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 248c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 249c66ac9dbSNicholas Bellinger cdb[2] = 0x83; /* Device Identifier */ 250c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; 251c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); 252c66ac9dbSNicholas Bellinger 253c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 254c66ac9dbSNicholas Bellinger INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, 255c66ac9dbSNicholas Bellinger NULL, HZ, 1, NULL); 256c66ac9dbSNicholas Bellinger if (ret) 257c66ac9dbSNicholas Bellinger goto out; 258c66ac9dbSNicholas Bellinger 259c66ac9dbSNicholas Bellinger page_len = (buf[2] << 8) | buf[3]; 260c66ac9dbSNicholas Bellinger while (page_len > 0) { 261c66ac9dbSNicholas Bellinger /* Grab a pointer to the Identification descriptor */ 262c66ac9dbSNicholas Bellinger page_83 = &buf[off]; 263c66ac9dbSNicholas Bellinger ident_len = page_83[3]; 264c66ac9dbSNicholas Bellinger if (!ident_len) { 2656708bb27SAndy Grover pr_err("page_83[3]: identifier" 266c66ac9dbSNicholas Bellinger " length zero!\n"); 267c66ac9dbSNicholas Bellinger break; 268c66ac9dbSNicholas Bellinger } 26935d1efe8SMasanari Iida pr_debug("T10 VPD Identifier Length: %d\n", ident_len); 270c66ac9dbSNicholas Bellinger 271c66ac9dbSNicholas Bellinger vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); 272c66ac9dbSNicholas Bellinger if (!vpd) { 2736708bb27SAndy Grover pr_err("Unable to allocate memory for" 274c66ac9dbSNicholas Bellinger " struct t10_vpd\n"); 275c66ac9dbSNicholas Bellinger goto out; 276c66ac9dbSNicholas Bellinger } 277c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&vpd->vpd_list); 278c66ac9dbSNicholas Bellinger 279c66ac9dbSNicholas Bellinger transport_set_vpd_proto_id(vpd, page_83); 280c66ac9dbSNicholas Bellinger transport_set_vpd_assoc(vpd, page_83); 281c66ac9dbSNicholas Bellinger 282c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident_type(vpd, page_83) < 0) { 283c66ac9dbSNicholas Bellinger off += (ident_len + 4); 284c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 285c66ac9dbSNicholas Bellinger kfree(vpd); 286c66ac9dbSNicholas Bellinger continue; 287c66ac9dbSNicholas Bellinger } 288c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident(vpd, page_83) < 0) { 289c66ac9dbSNicholas Bellinger off += (ident_len + 4); 290c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 291c66ac9dbSNicholas Bellinger kfree(vpd); 292c66ac9dbSNicholas Bellinger continue; 293c66ac9dbSNicholas Bellinger } 294c66ac9dbSNicholas Bellinger 295c66ac9dbSNicholas Bellinger list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); 296c66ac9dbSNicholas Bellinger off += (ident_len + 4); 297c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 298c66ac9dbSNicholas Bellinger } 299c66ac9dbSNicholas Bellinger 300c66ac9dbSNicholas Bellinger out: 301c66ac9dbSNicholas Bellinger kfree(buf); 302c66ac9dbSNicholas Bellinger } 303c66ac9dbSNicholas Bellinger 3040fd97ccfSChristoph Hellwig static int pscsi_add_device_to_list(struct se_device *dev, 3050fd97ccfSChristoph Hellwig struct scsi_device *sd) 306c66ac9dbSNicholas Bellinger { 3070fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 3080fd97ccfSChristoph Hellwig struct request_queue *q = sd->request_queue; 309c66ac9dbSNicholas Bellinger 3100fd97ccfSChristoph Hellwig pdv->pdv_sd = sd; 311c66ac9dbSNicholas Bellinger 312c66ac9dbSNicholas Bellinger if (!sd->queue_depth) { 313c66ac9dbSNicholas Bellinger sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; 314c66ac9dbSNicholas Bellinger 3159cb78c16SHannes Reinecke pr_err("Set broken SCSI Device %d:%d:%llu" 316c66ac9dbSNicholas Bellinger " queue_depth to %d\n", sd->channel, sd->id, 317c66ac9dbSNicholas Bellinger sd->lun, sd->queue_depth); 318c66ac9dbSNicholas Bellinger } 3190fd97ccfSChristoph Hellwig 3200fd97ccfSChristoph Hellwig dev->dev_attrib.hw_block_size = sd->sector_size; 3210fd97ccfSChristoph Hellwig dev->dev_attrib.hw_max_sectors = 3220fd97ccfSChristoph Hellwig min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q)); 3230fd97ccfSChristoph Hellwig dev->dev_attrib.hw_queue_depth = sd->queue_depth; 3240fd97ccfSChristoph Hellwig 325c66ac9dbSNicholas Bellinger /* 326c66ac9dbSNicholas Bellinger * Setup our standard INQUIRY info into se_dev->t10_wwn 327c66ac9dbSNicholas Bellinger */ 3280fd97ccfSChristoph Hellwig pscsi_set_inquiry_info(sd, &dev->t10_wwn); 329c66ac9dbSNicholas Bellinger 330c66ac9dbSNicholas Bellinger /* 331c66ac9dbSNicholas Bellinger * Locate VPD WWN Information used for various purposes within 332c66ac9dbSNicholas Bellinger * the Storage Engine. 333c66ac9dbSNicholas Bellinger */ 3340fd97ccfSChristoph Hellwig if (!pscsi_get_inquiry_vpd_serial(sd, &dev->t10_wwn)) { 335c66ac9dbSNicholas Bellinger /* 336c66ac9dbSNicholas Bellinger * If VPD Unit Serial returned GOOD status, try 337c66ac9dbSNicholas Bellinger * VPD Device Identification page (0x83). 338c66ac9dbSNicholas Bellinger */ 3390fd97ccfSChristoph Hellwig pscsi_get_inquiry_vpd_device_ident(sd, &dev->t10_wwn); 340c66ac9dbSNicholas Bellinger } 341c66ac9dbSNicholas Bellinger 342c66ac9dbSNicholas Bellinger /* 343c66ac9dbSNicholas Bellinger * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. 344c66ac9dbSNicholas Bellinger */ 345c66ac9dbSNicholas Bellinger if (sd->type == TYPE_TAPE) 346c66ac9dbSNicholas Bellinger pscsi_tape_read_blocksize(dev, sd); 3470fd97ccfSChristoph Hellwig return 0; 348c66ac9dbSNicholas Bellinger } 349c66ac9dbSNicholas Bellinger 3500fd97ccfSChristoph Hellwig static struct se_device *pscsi_alloc_device(struct se_hba *hba, 3510fd97ccfSChristoph Hellwig const char *name) 352c66ac9dbSNicholas Bellinger { 353c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv; 354c66ac9dbSNicholas Bellinger 355c66ac9dbSNicholas Bellinger pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); 3566708bb27SAndy Grover if (!pdv) { 3576708bb27SAndy Grover pr_err("Unable to allocate memory for struct pscsi_dev_virt\n"); 358c66ac9dbSNicholas Bellinger return NULL; 359c66ac9dbSNicholas Bellinger } 360c66ac9dbSNicholas Bellinger 3616708bb27SAndy Grover pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name); 3620fd97ccfSChristoph Hellwig return &pdv->dev; 363c66ac9dbSNicholas Bellinger } 364c66ac9dbSNicholas Bellinger 365c66ac9dbSNicholas Bellinger /* 366c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 367c66ac9dbSNicholas Bellinger */ 3680fd97ccfSChristoph Hellwig static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd) 3695dd7ed2eSDan Carpenter __releases(sh->host_lock) 370c66ac9dbSNicholas Bellinger { 3710fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 3720fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 373c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 374c66ac9dbSNicholas Bellinger struct block_device *bd; 3750fd97ccfSChristoph Hellwig int ret; 376c66ac9dbSNicholas Bellinger 377c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 3789cb78c16SHannes Reinecke pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n", 379c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 380c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 3810fd97ccfSChristoph Hellwig return -EIO; 382c66ac9dbSNicholas Bellinger } 383c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 384c66ac9dbSNicholas Bellinger /* 385c66ac9dbSNicholas Bellinger * Claim exclusive struct block_device access to struct scsi_device 386c66ac9dbSNicholas Bellinger * for TYPE_DISK using supplied udev_path 387c66ac9dbSNicholas Bellinger */ 3880fd97ccfSChristoph Hellwig bd = blkdev_get_by_path(dev->udev_path, 389c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); 3903ae279d2SDan Carpenter if (IS_ERR(bd)) { 3916708bb27SAndy Grover pr_err("pSCSI: blkdev_get_by_path() failed\n"); 392c66ac9dbSNicholas Bellinger scsi_device_put(sd); 3930fd97ccfSChristoph Hellwig return PTR_ERR(bd); 394c66ac9dbSNicholas Bellinger } 395c66ac9dbSNicholas Bellinger pdv->pdv_bd = bd; 396c66ac9dbSNicholas Bellinger 3970fd97ccfSChristoph Hellwig ret = pscsi_add_device_to_list(dev, sd); 3980fd97ccfSChristoph Hellwig if (ret) { 399c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); 400c66ac9dbSNicholas Bellinger scsi_device_put(sd); 4010fd97ccfSChristoph Hellwig return ret; 402c66ac9dbSNicholas Bellinger } 4030fd97ccfSChristoph Hellwig 4049cb78c16SHannes Reinecke pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%llu\n", 405c66ac9dbSNicholas Bellinger phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); 4060fd97ccfSChristoph Hellwig return 0; 407c66ac9dbSNicholas Bellinger } 408c66ac9dbSNicholas Bellinger 409c66ac9dbSNicholas Bellinger /* 410c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 411c66ac9dbSNicholas Bellinger */ 4120fd97ccfSChristoph Hellwig static int pscsi_create_type_rom(struct se_device *dev, struct scsi_device *sd) 4135dd7ed2eSDan Carpenter __releases(sh->host_lock) 414c66ac9dbSNicholas Bellinger { 4150fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 416c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 4170fd97ccfSChristoph Hellwig int ret; 418c66ac9dbSNicholas Bellinger 419c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 4209cb78c16SHannes Reinecke pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n", 421c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 422c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 4230fd97ccfSChristoph Hellwig return -EIO; 424c66ac9dbSNicholas Bellinger } 425c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 426c66ac9dbSNicholas Bellinger 4270fd97ccfSChristoph Hellwig ret = pscsi_add_device_to_list(dev, sd); 4280fd97ccfSChristoph Hellwig if (ret) { 429c66ac9dbSNicholas Bellinger scsi_device_put(sd); 4300fd97ccfSChristoph Hellwig return ret; 431c66ac9dbSNicholas Bellinger } 4329cb78c16SHannes Reinecke pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n", 433c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 434c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 435c66ac9dbSNicholas Bellinger 4360fd97ccfSChristoph Hellwig return 0; 437c66ac9dbSNicholas Bellinger } 438c66ac9dbSNicholas Bellinger 439c66ac9dbSNicholas Bellinger /* 440c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 441c66ac9dbSNicholas Bellinger */ 4420fd97ccfSChristoph Hellwig static int pscsi_create_type_other(struct se_device *dev, 4430fd97ccfSChristoph Hellwig struct scsi_device *sd) 4445dd7ed2eSDan Carpenter __releases(sh->host_lock) 445c66ac9dbSNicholas Bellinger { 4460fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 447c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 4480fd97ccfSChristoph Hellwig int ret; 449c66ac9dbSNicholas Bellinger 450c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 4510fd97ccfSChristoph Hellwig ret = pscsi_add_device_to_list(dev, sd); 4520fd97ccfSChristoph Hellwig if (ret) 4530fd97ccfSChristoph Hellwig return ret; 454c66ac9dbSNicholas Bellinger 4559cb78c16SHannes Reinecke pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n", 456c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 457c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 4580fd97ccfSChristoph Hellwig return 0; 459c66ac9dbSNicholas Bellinger } 460c66ac9dbSNicholas Bellinger 461ecf0dd66SFengguang Wu static int pscsi_configure_device(struct se_device *dev) 462c66ac9dbSNicholas Bellinger { 4630fd97ccfSChristoph Hellwig struct se_hba *hba = dev->se_hba; 4640fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 465c66ac9dbSNicholas Bellinger struct scsi_device *sd; 4660fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 467c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 468c66ac9dbSNicholas Bellinger int legacy_mode_enable = 0; 4690fd97ccfSChristoph Hellwig int ret; 470c66ac9dbSNicholas Bellinger 4710fd97ccfSChristoph Hellwig if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || 4720fd97ccfSChristoph Hellwig !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || 4730fd97ccfSChristoph Hellwig !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { 4740fd97ccfSChristoph Hellwig pr_err("Missing scsi_channel_id=, scsi_target_id= and" 4750fd97ccfSChristoph Hellwig " scsi_lun_id= parameters\n"); 4760fd97ccfSChristoph Hellwig return -EINVAL; 477c66ac9dbSNicholas Bellinger } 4780fd97ccfSChristoph Hellwig 479c66ac9dbSNicholas Bellinger /* 480c66ac9dbSNicholas Bellinger * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the 481c66ac9dbSNicholas Bellinger * struct Scsi_Host we will need to bring the TCM/pSCSI object online 482c66ac9dbSNicholas Bellinger */ 4836708bb27SAndy Grover if (!sh) { 484c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 4856708bb27SAndy Grover pr_err("pSCSI: Unable to locate struct" 486c66ac9dbSNicholas Bellinger " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); 4870fd97ccfSChristoph Hellwig return -ENODEV; 488c66ac9dbSNicholas Bellinger } 489c66ac9dbSNicholas Bellinger /* 490e6a8a41aSStefan Hajnoczi * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device 491c66ac9dbSNicholas Bellinger * reference, we enforce that udev_path has been set 492c66ac9dbSNicholas Bellinger */ 4930fd97ccfSChristoph Hellwig if (!(dev->dev_flags & DF_USING_UDEV_PATH)) { 4946708bb27SAndy Grover pr_err("pSCSI: udev_path attribute has not" 495c66ac9dbSNicholas Bellinger " been set before ENABLE=1\n"); 4960fd97ccfSChristoph Hellwig return -EINVAL; 497c66ac9dbSNicholas Bellinger } 498c66ac9dbSNicholas Bellinger /* 499e6a8a41aSStefan Hajnoczi * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID, 500c66ac9dbSNicholas Bellinger * use the original TCM hba ID to reference Linux/SCSI Host No 501c66ac9dbSNicholas Bellinger * and enable for PHV_LLD_SCSI_HOST_NO mode. 502c66ac9dbSNicholas Bellinger */ 503c66ac9dbSNicholas Bellinger if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { 5040fd97ccfSChristoph Hellwig if (hba->dev_count) { 5056708bb27SAndy Grover pr_err("pSCSI: Unable to set hba_mode" 506c66ac9dbSNicholas Bellinger " with active devices\n"); 5070fd97ccfSChristoph Hellwig return -EEXIST; 508c66ac9dbSNicholas Bellinger } 509c66ac9dbSNicholas Bellinger 510c66ac9dbSNicholas Bellinger if (pscsi_pmode_enable_hba(hba, 1) != 1) 5110fd97ccfSChristoph Hellwig return -ENODEV; 512c66ac9dbSNicholas Bellinger 513c66ac9dbSNicholas Bellinger legacy_mode_enable = 1; 514c66ac9dbSNicholas Bellinger hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 515c66ac9dbSNicholas Bellinger sh = phv->phv_lld_host; 516c66ac9dbSNicholas Bellinger } else { 517e3d6f909SAndy Grover sh = scsi_host_lookup(pdv->pdv_host_id); 51858932e96SWei Yongjun if (!sh) { 5196708bb27SAndy Grover pr_err("pSCSI: Unable to locate" 520c66ac9dbSNicholas Bellinger " pdv_host_id: %d\n", pdv->pdv_host_id); 52158932e96SWei Yongjun return -EINVAL; 522c66ac9dbSNicholas Bellinger } 5235a7125c6SAndy Grover pdv->pdv_lld_host = sh; 524c66ac9dbSNicholas Bellinger } 525c66ac9dbSNicholas Bellinger } else { 526e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) { 527e6a8a41aSStefan Hajnoczi pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while" 528c66ac9dbSNicholas Bellinger " struct Scsi_Host exists\n"); 5290fd97ccfSChristoph Hellwig return -EEXIST; 530c66ac9dbSNicholas Bellinger } 531c66ac9dbSNicholas Bellinger } 532c66ac9dbSNicholas Bellinger 533c66ac9dbSNicholas Bellinger spin_lock_irq(sh->host_lock); 534c66ac9dbSNicholas Bellinger list_for_each_entry(sd, &sh->__devices, siblings) { 535c66ac9dbSNicholas Bellinger if ((pdv->pdv_channel_id != sd->channel) || 536c66ac9dbSNicholas Bellinger (pdv->pdv_target_id != sd->id) || 537c66ac9dbSNicholas Bellinger (pdv->pdv_lun_id != sd->lun)) 538c66ac9dbSNicholas Bellinger continue; 539c66ac9dbSNicholas Bellinger /* 540c66ac9dbSNicholas Bellinger * Functions will release the held struct scsi_host->host_lock 541c66ac9dbSNicholas Bellinger * before calling calling pscsi_add_device_to_list() to register 542c66ac9dbSNicholas Bellinger * struct scsi_device with target_core_mod. 543c66ac9dbSNicholas Bellinger */ 544c66ac9dbSNicholas Bellinger switch (sd->type) { 545c66ac9dbSNicholas Bellinger case TYPE_DISK: 5460fd97ccfSChristoph Hellwig ret = pscsi_create_type_disk(dev, sd); 547c66ac9dbSNicholas Bellinger break; 548c66ac9dbSNicholas Bellinger case TYPE_ROM: 5490fd97ccfSChristoph Hellwig ret = pscsi_create_type_rom(dev, sd); 550c66ac9dbSNicholas Bellinger break; 551c66ac9dbSNicholas Bellinger default: 5520fd97ccfSChristoph Hellwig ret = pscsi_create_type_other(dev, sd); 553c66ac9dbSNicholas Bellinger break; 554c66ac9dbSNicholas Bellinger } 555c66ac9dbSNicholas Bellinger 5560fd97ccfSChristoph Hellwig if (ret) { 557e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 558c66ac9dbSNicholas Bellinger scsi_host_put(sh); 559c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 560c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 561c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 562c66ac9dbSNicholas Bellinger } 563c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 5640fd97ccfSChristoph Hellwig return ret; 565c66ac9dbSNicholas Bellinger } 5660fd97ccfSChristoph Hellwig return 0; 567c66ac9dbSNicholas Bellinger } 568c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 569c66ac9dbSNicholas Bellinger 5706708bb27SAndy Grover pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, 571c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); 572c66ac9dbSNicholas Bellinger 573e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 574c66ac9dbSNicholas Bellinger scsi_host_put(sh); 575c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 576c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 577c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 578c66ac9dbSNicholas Bellinger } 579c66ac9dbSNicholas Bellinger 5800fd97ccfSChristoph Hellwig return -ENODEV; 581c66ac9dbSNicholas Bellinger } 582c66ac9dbSNicholas Bellinger 5830fd97ccfSChristoph Hellwig static void pscsi_free_device(struct se_device *dev) 584c66ac9dbSNicholas Bellinger { 5850fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 5860fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 587c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 588c66ac9dbSNicholas Bellinger 589c66ac9dbSNicholas Bellinger if (sd) { 590c66ac9dbSNicholas Bellinger /* 591c66ac9dbSNicholas Bellinger * Release exclusive pSCSI internal struct block_device claim for 592c66ac9dbSNicholas Bellinger * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() 593c66ac9dbSNicholas Bellinger */ 594c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { 595c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, 596c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL); 597c66ac9dbSNicholas Bellinger pdv->pdv_bd = NULL; 598c66ac9dbSNicholas Bellinger } 599c66ac9dbSNicholas Bellinger /* 600c66ac9dbSNicholas Bellinger * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference 601c66ac9dbSNicholas Bellinger * to struct Scsi_Host now. 602c66ac9dbSNicholas Bellinger */ 603c66ac9dbSNicholas Bellinger if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && 604c66ac9dbSNicholas Bellinger (phv->phv_lld_host != NULL)) 605c66ac9dbSNicholas Bellinger scsi_host_put(phv->phv_lld_host); 6065a7125c6SAndy Grover else if (pdv->pdv_lld_host) 6075a7125c6SAndy Grover scsi_host_put(pdv->pdv_lld_host); 608c66ac9dbSNicholas Bellinger 609c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) 610c66ac9dbSNicholas Bellinger scsi_device_put(sd); 611c66ac9dbSNicholas Bellinger 612c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 613c66ac9dbSNicholas Bellinger } 614c66ac9dbSNicholas Bellinger 615c66ac9dbSNicholas Bellinger kfree(pdv); 616c66ac9dbSNicholas Bellinger } 617c66ac9dbSNicholas Bellinger 618d5829eacSPaolo Bonzini static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg, 619d5829eacSPaolo Bonzini unsigned char *sense_buffer) 620c66ac9dbSNicholas Bellinger { 6210fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); 622c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 623c66ac9dbSNicholas Bellinger int result; 6245787cacdSChristoph Hellwig struct pscsi_plugin_task *pt = cmd->priv; 6251d2a2cd9SNicholas Bellinger unsigned char *cdb; 6261d2a2cd9SNicholas Bellinger /* 6271d2a2cd9SNicholas Bellinger * Special case for REPORT_LUNs handling where pscsi_plugin_task has 6281d2a2cd9SNicholas Bellinger * not been allocated because TCM is handling the emulation directly. 6291d2a2cd9SNicholas Bellinger */ 6301d2a2cd9SNicholas Bellinger if (!pt) 631d5829eacSPaolo Bonzini return; 632c66ac9dbSNicholas Bellinger 6331d2a2cd9SNicholas Bellinger cdb = &pt->pscsi_cdb[0]; 634c66ac9dbSNicholas Bellinger result = pt->pscsi_result; 635c66ac9dbSNicholas Bellinger /* 636c66ac9dbSNicholas Bellinger * Hack to make sure that Write-Protect modepage is set if R/O mode is 637c66ac9dbSNicholas Bellinger * forced. 638c66ac9dbSNicholas Bellinger */ 63929a05deeSNicholas Bellinger if (!cmd->data_length) 640c66ac9dbSNicholas Bellinger goto after_mode_sense; 641c66ac9dbSNicholas Bellinger 642306c11b2SPaolo Bonzini if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && 643306c11b2SPaolo Bonzini (status_byte(result) << 1) == SAM_STAT_GOOD) { 64429a05deeSNicholas Bellinger bool read_only = target_lun_is_rdonly(cmd); 64529a05deeSNicholas Bellinger 64629a05deeSNicholas Bellinger if (read_only) { 647de103c93SChristoph Hellwig unsigned char *buf; 648de103c93SChristoph Hellwig 649de103c93SChristoph Hellwig buf = transport_kmap_data_sg(cmd); 650de103c93SChristoph Hellwig if (!buf) 651de103c93SChristoph Hellwig ; /* XXX: TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE */ 652c66ac9dbSNicholas Bellinger 653c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SENSE_10) { 654c66ac9dbSNicholas Bellinger if (!(buf[3] & 0x80)) 655c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 656c66ac9dbSNicholas Bellinger } else { 657c66ac9dbSNicholas Bellinger if (!(buf[2] & 0x80)) 658c66ac9dbSNicholas Bellinger buf[2] |= 0x80; 659c66ac9dbSNicholas Bellinger } 66005d1c7c0SAndy Grover 6615787cacdSChristoph Hellwig transport_kunmap_data_sg(cmd); 662c66ac9dbSNicholas Bellinger } 663c66ac9dbSNicholas Bellinger } 664c66ac9dbSNicholas Bellinger after_mode_sense: 665c66ac9dbSNicholas Bellinger 666306c11b2SPaolo Bonzini if (sd->type != TYPE_TAPE || !cmd->data_length) 667c66ac9dbSNicholas Bellinger goto after_mode_select; 668c66ac9dbSNicholas Bellinger 669c66ac9dbSNicholas Bellinger /* 670c66ac9dbSNicholas Bellinger * Hack to correctly obtain the initiator requested blocksize for 671c66ac9dbSNicholas Bellinger * TYPE_TAPE. Since this value is dependent upon each tape media, 672c66ac9dbSNicholas Bellinger * struct scsi_device->sector_size will not contain the correct value 673c66ac9dbSNicholas Bellinger * by default, so we go ahead and set it so 674c66ac9dbSNicholas Bellinger * TRANSPORT(dev)->get_blockdev() returns the correct value to the 675c66ac9dbSNicholas Bellinger * storage engine. 676c66ac9dbSNicholas Bellinger */ 677c66ac9dbSNicholas Bellinger if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && 678c66ac9dbSNicholas Bellinger (status_byte(result) << 1) == SAM_STAT_GOOD) { 679c66ac9dbSNicholas Bellinger unsigned char *buf; 680c66ac9dbSNicholas Bellinger u16 bdl; 681c66ac9dbSNicholas Bellinger u32 blocksize; 682c66ac9dbSNicholas Bellinger 683c66ac9dbSNicholas Bellinger buf = sg_virt(&sg[0]); 6846708bb27SAndy Grover if (!buf) { 6856708bb27SAndy Grover pr_err("Unable to get buf for scatterlist\n"); 686c66ac9dbSNicholas Bellinger goto after_mode_select; 687c66ac9dbSNicholas Bellinger } 688c66ac9dbSNicholas Bellinger 689c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 690c66ac9dbSNicholas Bellinger bdl = (buf[3]); 691c66ac9dbSNicholas Bellinger else 692c66ac9dbSNicholas Bellinger bdl = (buf[6] << 8) | (buf[7]); 693c66ac9dbSNicholas Bellinger 694c66ac9dbSNicholas Bellinger if (!bdl) 695c66ac9dbSNicholas Bellinger goto after_mode_select; 696c66ac9dbSNicholas Bellinger 697c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 698c66ac9dbSNicholas Bellinger blocksize = (buf[9] << 16) | (buf[10] << 8) | 699c66ac9dbSNicholas Bellinger (buf[11]); 700c66ac9dbSNicholas Bellinger else 701c66ac9dbSNicholas Bellinger blocksize = (buf[13] << 16) | (buf[14] << 8) | 702c66ac9dbSNicholas Bellinger (buf[15]); 703c66ac9dbSNicholas Bellinger 704c66ac9dbSNicholas Bellinger sd->sector_size = blocksize; 705c66ac9dbSNicholas Bellinger } 706c66ac9dbSNicholas Bellinger after_mode_select: 707c66ac9dbSNicholas Bellinger 708d5829eacSPaolo Bonzini if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) { 709d5829eacSPaolo Bonzini memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER); 710d5829eacSPaolo Bonzini cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; 711d5829eacSPaolo Bonzini } 712c66ac9dbSNicholas Bellinger } 713c66ac9dbSNicholas Bellinger 714c66ac9dbSNicholas Bellinger enum { 715c66ac9dbSNicholas Bellinger Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, 716c66ac9dbSNicholas Bellinger Opt_scsi_lun_id, Opt_err 717c66ac9dbSNicholas Bellinger }; 718c66ac9dbSNicholas Bellinger 719c66ac9dbSNicholas Bellinger static match_table_t tokens = { 720c66ac9dbSNicholas Bellinger {Opt_scsi_host_id, "scsi_host_id=%d"}, 721c66ac9dbSNicholas Bellinger {Opt_scsi_channel_id, "scsi_channel_id=%d"}, 722c66ac9dbSNicholas Bellinger {Opt_scsi_target_id, "scsi_target_id=%d"}, 723c66ac9dbSNicholas Bellinger {Opt_scsi_lun_id, "scsi_lun_id=%d"}, 724c66ac9dbSNicholas Bellinger {Opt_err, NULL} 725c66ac9dbSNicholas Bellinger }; 726c66ac9dbSNicholas Bellinger 7270fd97ccfSChristoph Hellwig static ssize_t pscsi_set_configfs_dev_params(struct se_device *dev, 7280fd97ccfSChristoph Hellwig const char *page, ssize_t count) 729c66ac9dbSNicholas Bellinger { 7300fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 7310fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 732c66ac9dbSNicholas Bellinger char *orig, *ptr, *opts; 733c66ac9dbSNicholas Bellinger substring_t args[MAX_OPT_ARGS]; 734c66ac9dbSNicholas Bellinger int ret = 0, arg, token; 735c66ac9dbSNicholas Bellinger 736c66ac9dbSNicholas Bellinger opts = kstrdup(page, GFP_KERNEL); 737c66ac9dbSNicholas Bellinger if (!opts) 738c66ac9dbSNicholas Bellinger return -ENOMEM; 739c66ac9dbSNicholas Bellinger 740c66ac9dbSNicholas Bellinger orig = opts; 741c66ac9dbSNicholas Bellinger 74290c161b6SSebastian Andrzej Siewior while ((ptr = strsep(&opts, ",\n")) != NULL) { 743c66ac9dbSNicholas Bellinger if (!*ptr) 744c66ac9dbSNicholas Bellinger continue; 745c66ac9dbSNicholas Bellinger 746c66ac9dbSNicholas Bellinger token = match_token(ptr, tokens, args); 747c66ac9dbSNicholas Bellinger switch (token) { 748c66ac9dbSNicholas Bellinger case Opt_scsi_host_id: 749c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 7506708bb27SAndy Grover pr_err("PSCSI[%d]: Unable to accept" 751c66ac9dbSNicholas Bellinger " scsi_host_id while phv_mode ==" 752c66ac9dbSNicholas Bellinger " PHV_LLD_SCSI_HOST_NO\n", 753c66ac9dbSNicholas Bellinger phv->phv_host_id); 754c66ac9dbSNicholas Bellinger ret = -EINVAL; 755c66ac9dbSNicholas Bellinger goto out; 756c66ac9dbSNicholas Bellinger } 757ce31c1b0SJoern Engel ret = match_int(args, &arg); 758ce31c1b0SJoern Engel if (ret) 759ce31c1b0SJoern Engel goto out; 760c66ac9dbSNicholas Bellinger pdv->pdv_host_id = arg; 7616708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Host ID:" 762c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_host_id); 763c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; 764c66ac9dbSNicholas Bellinger break; 765c66ac9dbSNicholas Bellinger case Opt_scsi_channel_id: 766ce31c1b0SJoern Engel ret = match_int(args, &arg); 767ce31c1b0SJoern Engel if (ret) 768ce31c1b0SJoern Engel goto out; 769c66ac9dbSNicholas Bellinger pdv->pdv_channel_id = arg; 7706708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Channel" 771c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 772c66ac9dbSNicholas Bellinger pdv->pdv_channel_id); 773c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; 774c66ac9dbSNicholas Bellinger break; 775c66ac9dbSNicholas Bellinger case Opt_scsi_target_id: 776ce31c1b0SJoern Engel ret = match_int(args, &arg); 777ce31c1b0SJoern Engel if (ret) 778ce31c1b0SJoern Engel goto out; 779c66ac9dbSNicholas Bellinger pdv->pdv_target_id = arg; 7806708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Target" 781c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 782c66ac9dbSNicholas Bellinger pdv->pdv_target_id); 783c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_TARGET_ID; 784c66ac9dbSNicholas Bellinger break; 785c66ac9dbSNicholas Bellinger case Opt_scsi_lun_id: 786ce31c1b0SJoern Engel ret = match_int(args, &arg); 787ce31c1b0SJoern Engel if (ret) 788ce31c1b0SJoern Engel goto out; 789c66ac9dbSNicholas Bellinger pdv->pdv_lun_id = arg; 7906708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:" 791c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_lun_id); 792c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_LUN_ID; 793c66ac9dbSNicholas Bellinger break; 794c66ac9dbSNicholas Bellinger default: 795c66ac9dbSNicholas Bellinger break; 796c66ac9dbSNicholas Bellinger } 797c66ac9dbSNicholas Bellinger } 798c66ac9dbSNicholas Bellinger 799c66ac9dbSNicholas Bellinger out: 800c66ac9dbSNicholas Bellinger kfree(orig); 801c66ac9dbSNicholas Bellinger return (!ret) ? count : ret; 802c66ac9dbSNicholas Bellinger } 803c66ac9dbSNicholas Bellinger 8040fd97ccfSChristoph Hellwig static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b) 805c66ac9dbSNicholas Bellinger { 8060fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 8070fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 808c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 809c66ac9dbSNicholas Bellinger unsigned char host_id[16]; 810c66ac9dbSNicholas Bellinger ssize_t bl; 811c66ac9dbSNicholas Bellinger int i; 812c66ac9dbSNicholas Bellinger 813e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 814c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "%d", pdv->pdv_host_id); 815c66ac9dbSNicholas Bellinger else 816c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "PHBA Mode"); 817c66ac9dbSNicholas Bellinger 818c66ac9dbSNicholas Bellinger bl = sprintf(b, "SCSI Device Bus Location:" 819c66ac9dbSNicholas Bellinger " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", 820c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, 821c66ac9dbSNicholas Bellinger host_id); 822c66ac9dbSNicholas Bellinger 823c66ac9dbSNicholas Bellinger if (sd) { 824c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 825c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "Vendor: "); 826c66ac9dbSNicholas Bellinger for (i = 0; i < 8; i++) { 827c66ac9dbSNicholas Bellinger if (ISPRINT(sd->vendor[i])) /* printable character? */ 828c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->vendor[i]); 829c66ac9dbSNicholas Bellinger else 830c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 831c66ac9dbSNicholas Bellinger } 832c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Model: "); 833c66ac9dbSNicholas Bellinger for (i = 0; i < 16; i++) { 834c66ac9dbSNicholas Bellinger if (ISPRINT(sd->model[i])) /* printable character ? */ 835c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->model[i]); 836c66ac9dbSNicholas Bellinger else 837c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 838c66ac9dbSNicholas Bellinger } 839c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Rev: "); 840c66ac9dbSNicholas Bellinger for (i = 0; i < 4; i++) { 841c66ac9dbSNicholas Bellinger if (ISPRINT(sd->rev[i])) /* printable character ? */ 842c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->rev[i]); 843c66ac9dbSNicholas Bellinger else 844c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 845c66ac9dbSNicholas Bellinger } 846c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "\n"); 847c66ac9dbSNicholas Bellinger } 848c66ac9dbSNicholas Bellinger return bl; 849c66ac9dbSNicholas Bellinger } 850c66ac9dbSNicholas Bellinger 851c66ac9dbSNicholas Bellinger static void pscsi_bi_endio(struct bio *bio, int error) 852c66ac9dbSNicholas Bellinger { 853c66ac9dbSNicholas Bellinger bio_put(bio); 854c66ac9dbSNicholas Bellinger } 855c66ac9dbSNicholas Bellinger 8562dbe10a2SAsias He static inline struct bio *pscsi_get_bio(int nr_vecs) 857c66ac9dbSNicholas Bellinger { 858c66ac9dbSNicholas Bellinger struct bio *bio; 859c66ac9dbSNicholas Bellinger /* 860c66ac9dbSNicholas Bellinger * Use bio_malloc() following the comment in for bio -> struct request 861c66ac9dbSNicholas Bellinger * in block/blk-core.c:blk_make_request() 862c66ac9dbSNicholas Bellinger */ 8632dbe10a2SAsias He bio = bio_kmalloc(GFP_KERNEL, nr_vecs); 8646708bb27SAndy Grover if (!bio) { 8656708bb27SAndy Grover pr_err("PSCSI: bio_kmalloc() failed\n"); 866c66ac9dbSNicholas Bellinger return NULL; 867c66ac9dbSNicholas Bellinger } 868c66ac9dbSNicholas Bellinger bio->bi_end_io = pscsi_bi_endio; 869c66ac9dbSNicholas Bellinger 870c66ac9dbSNicholas Bellinger return bio; 871c66ac9dbSNicholas Bellinger } 872c66ac9dbSNicholas Bellinger 873de103c93SChristoph Hellwig static sense_reason_t 874de103c93SChristoph Hellwig pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, 875de103c93SChristoph Hellwig enum dma_data_direction data_direction, struct bio **hbio) 876c66ac9dbSNicholas Bellinger { 8770fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); 87802b1a746SChristoph Hellwig struct bio *bio = NULL, *tbio = NULL; 879c66ac9dbSNicholas Bellinger struct page *page; 880c66ac9dbSNicholas Bellinger struct scatterlist *sg; 8817a83aa4eSChristoph Hellwig u32 data_len = cmd->data_length, i, len, bytes, off; 8825787cacdSChristoph Hellwig int nr_pages = (cmd->data_length + sgl[0].offset + 883c66ac9dbSNicholas Bellinger PAGE_SIZE - 1) >> PAGE_SHIFT; 88403e98c9eSNicholas Bellinger int nr_vecs = 0, rc; 8855787cacdSChristoph Hellwig int rw = (data_direction == DMA_TO_DEVICE); 886c66ac9dbSNicholas Bellinger 88702b1a746SChristoph Hellwig *hbio = NULL; 88802b1a746SChristoph Hellwig 8896708bb27SAndy Grover pr_debug("PSCSI: nr_pages: %d\n", nr_pages); 890c66ac9dbSNicholas Bellinger 8915787cacdSChristoph Hellwig for_each_sg(sgl, sg, sgl_nents, i) { 892c66ac9dbSNicholas Bellinger page = sg_page(sg); 893c66ac9dbSNicholas Bellinger off = sg->offset; 894c66ac9dbSNicholas Bellinger len = sg->length; 895c66ac9dbSNicholas Bellinger 8966708bb27SAndy Grover pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i, 897c66ac9dbSNicholas Bellinger page, len, off); 898c66ac9dbSNicholas Bellinger 8998f27d487SAsias He /* 9008f27d487SAsias He * We only have one page of data in each sg element, 9018f27d487SAsias He * we can not cross a page boundary. 9028f27d487SAsias He */ 9038f27d487SAsias He if (off + len > PAGE_SIZE) 9048f27d487SAsias He goto fail; 9058f27d487SAsias He 9068f27d487SAsias He if (len > 0 && data_len > 0) { 907c66ac9dbSNicholas Bellinger bytes = min_t(unsigned int, len, PAGE_SIZE - off); 908c66ac9dbSNicholas Bellinger bytes = min(bytes, data_len); 909c66ac9dbSNicholas Bellinger 9106708bb27SAndy Grover if (!bio) { 911c66ac9dbSNicholas Bellinger nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); 912c66ac9dbSNicholas Bellinger nr_pages -= nr_vecs; 913c66ac9dbSNicholas Bellinger /* 914c66ac9dbSNicholas Bellinger * Calls bio_kmalloc() and sets bio->bi_end_io() 915c66ac9dbSNicholas Bellinger */ 916a1d8b49aSAndy Grover bio = pscsi_get_bio(nr_vecs); 9176708bb27SAndy Grover if (!bio) 918c66ac9dbSNicholas Bellinger goto fail; 919c66ac9dbSNicholas Bellinger 920c66ac9dbSNicholas Bellinger if (rw) 921c66ac9dbSNicholas Bellinger bio->bi_rw |= REQ_WRITE; 922c66ac9dbSNicholas Bellinger 9236708bb27SAndy Grover pr_debug("PSCSI: Allocated bio: %p," 924c66ac9dbSNicholas Bellinger " dir: %s nr_vecs: %d\n", bio, 925c66ac9dbSNicholas Bellinger (rw) ? "rw" : "r", nr_vecs); 926c66ac9dbSNicholas Bellinger /* 927c66ac9dbSNicholas Bellinger * Set *hbio pointer to handle the case: 928c66ac9dbSNicholas Bellinger * nr_pages > BIO_MAX_PAGES, where additional 929c66ac9dbSNicholas Bellinger * bios need to be added to complete a given 9305787cacdSChristoph Hellwig * command. 931c66ac9dbSNicholas Bellinger */ 93202b1a746SChristoph Hellwig if (!*hbio) 93302b1a746SChristoph Hellwig *hbio = tbio = bio; 934c66ac9dbSNicholas Bellinger else 935c66ac9dbSNicholas Bellinger tbio = tbio->bi_next = bio; 936c66ac9dbSNicholas Bellinger } 937c66ac9dbSNicholas Bellinger 9386708bb27SAndy Grover pr_debug("PSCSI: Calling bio_add_pc_page() i: %d" 939c66ac9dbSNicholas Bellinger " bio: %p page: %p len: %d off: %d\n", i, bio, 940c66ac9dbSNicholas Bellinger page, len, off); 941c66ac9dbSNicholas Bellinger 942c66ac9dbSNicholas Bellinger rc = bio_add_pc_page(pdv->pdv_sd->request_queue, 943c66ac9dbSNicholas Bellinger bio, page, bytes, off); 944c66ac9dbSNicholas Bellinger if (rc != bytes) 945c66ac9dbSNicholas Bellinger goto fail; 946c66ac9dbSNicholas Bellinger 9476708bb27SAndy Grover pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", 948c66ac9dbSNicholas Bellinger bio->bi_vcnt, nr_vecs); 949c66ac9dbSNicholas Bellinger 950c66ac9dbSNicholas Bellinger if (bio->bi_vcnt > nr_vecs) { 9516708bb27SAndy Grover pr_debug("PSCSI: Reached bio->bi_vcnt max:" 952c66ac9dbSNicholas Bellinger " %d i: %d bio: %p, allocating another" 953c66ac9dbSNicholas Bellinger " bio\n", bio->bi_vcnt, i, bio); 954c66ac9dbSNicholas Bellinger /* 955c66ac9dbSNicholas Bellinger * Clear the pointer so that another bio will 956c66ac9dbSNicholas Bellinger * be allocated with pscsi_get_bio() above, the 957c66ac9dbSNicholas Bellinger * current bio has already been set *tbio and 958c66ac9dbSNicholas Bellinger * bio->bi_next. 959c66ac9dbSNicholas Bellinger */ 960c66ac9dbSNicholas Bellinger bio = NULL; 961c66ac9dbSNicholas Bellinger } 962c66ac9dbSNicholas Bellinger 963c66ac9dbSNicholas Bellinger data_len -= bytes; 964c66ac9dbSNicholas Bellinger } 965c66ac9dbSNicholas Bellinger } 966c66ac9dbSNicholas Bellinger 967de103c93SChristoph Hellwig return 0; 968c66ac9dbSNicholas Bellinger fail: 96902b1a746SChristoph Hellwig while (*hbio) { 97002b1a746SChristoph Hellwig bio = *hbio; 97102b1a746SChristoph Hellwig *hbio = (*hbio)->bi_next; 97202b1a746SChristoph Hellwig bio_endio(bio, 0); /* XXX: should be error */ 973c66ac9dbSNicholas Bellinger } 974de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 975c66ac9dbSNicholas Bellinger } 976c66ac9dbSNicholas Bellinger 977de103c93SChristoph Hellwig static sense_reason_t 978de103c93SChristoph Hellwig pscsi_parse_cdb(struct se_cmd *cmd) 979d6e0175cSChristoph Hellwig { 980de103c93SChristoph Hellwig if (cmd->se_cmd_flags & SCF_BIDI) 981de103c93SChristoph Hellwig return TCM_UNSUPPORTED_SCSI_OPCODE; 982d6e0175cSChristoph Hellwig 9837bfea53bSAndy Grover return passthrough_parse_cdb(cmd, pscsi_execute_cmd); 9848de530a5SChristoph Hellwig } 985d6e0175cSChristoph Hellwig 986de103c93SChristoph Hellwig static sense_reason_t 987de103c93SChristoph Hellwig pscsi_execute_cmd(struct se_cmd *cmd) 988c66ac9dbSNicholas Bellinger { 9890c2ad7d1SChristoph Hellwig struct scatterlist *sgl = cmd->t_data_sg; 9900c2ad7d1SChristoph Hellwig u32 sgl_nents = cmd->t_data_nents; 9910c2ad7d1SChristoph Hellwig enum dma_data_direction data_direction = cmd->data_direction; 9920fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); 9935787cacdSChristoph Hellwig struct pscsi_plugin_task *pt; 99402b1a746SChristoph Hellwig struct request *req; 99502b1a746SChristoph Hellwig struct bio *hbio; 996de103c93SChristoph Hellwig sense_reason_t ret; 997c66ac9dbSNicholas Bellinger 9985787cacdSChristoph Hellwig /* 9995787cacdSChristoph Hellwig * Dynamically alloc cdb space, since it may be larger than 10005787cacdSChristoph Hellwig * TCM_MAX_COMMAND_SIZE 10015787cacdSChristoph Hellwig */ 10025787cacdSChristoph Hellwig pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL); 10035787cacdSChristoph Hellwig if (!pt) { 1004de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 10055787cacdSChristoph Hellwig } 10065787cacdSChristoph Hellwig cmd->priv = pt; 10075787cacdSChristoph Hellwig 1008ed3102c6SChristoph Hellwig memcpy(pt->pscsi_cdb, cmd->t_task_cdb, 1009ed3102c6SChristoph Hellwig scsi_command_size(cmd->t_task_cdb)); 1010485fd0d1SChristoph Hellwig 101164f1db38SChristoph Hellwig if (!sgl) { 101202b1a746SChristoph Hellwig req = blk_get_request(pdv->pdv_sd->request_queue, 10135787cacdSChristoph Hellwig (data_direction == DMA_TO_DEVICE), 101402b1a746SChristoph Hellwig GFP_KERNEL); 1015a492f075SJoe Lawrence if (IS_ERR(req)) { 1016fdb4c1f3SDan Carpenter pr_err("PSCSI: blk_get_request() failed\n"); 1017de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 10185787cacdSChristoph Hellwig goto fail; 101902b1a746SChristoph Hellwig } 1020f27b087bSJens Axboe 1021f27b087bSJens Axboe blk_rq_set_block_pc(req); 102202b1a746SChristoph Hellwig } else { 10237a83aa4eSChristoph Hellwig BUG_ON(!cmd->data_length); 102402b1a746SChristoph Hellwig 10255787cacdSChristoph Hellwig ret = pscsi_map_sg(cmd, sgl, sgl_nents, data_direction, &hbio); 1026de103c93SChristoph Hellwig if (ret) 10275787cacdSChristoph Hellwig goto fail; 1028c66ac9dbSNicholas Bellinger 102902b1a746SChristoph Hellwig req = blk_make_request(pdv->pdv_sd->request_queue, hbio, 103002b1a746SChristoph Hellwig GFP_KERNEL); 1031ed327ed3SDan Carpenter if (IS_ERR(req)) { 103202b1a746SChristoph Hellwig pr_err("pSCSI: blk_make_request() failed\n"); 1033de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 10345787cacdSChristoph Hellwig goto fail_free_bio; 103502b1a746SChristoph Hellwig } 103602b1a746SChristoph Hellwig } 103702b1a746SChristoph Hellwig 103802b1a746SChristoph Hellwig req->end_io = pscsi_req_done; 10395787cacdSChristoph Hellwig req->end_io_data = cmd; 104002b1a746SChristoph Hellwig req->cmd_len = scsi_command_size(pt->pscsi_cdb); 104102b1a746SChristoph Hellwig req->cmd = &pt->pscsi_cdb[0]; 104202b1a746SChristoph Hellwig req->sense = &pt->pscsi_sense[0]; 104302b1a746SChristoph Hellwig req->sense_len = 0; 104402b1a746SChristoph Hellwig if (pdv->pdv_sd->type == TYPE_DISK) 104502b1a746SChristoph Hellwig req->timeout = PS_TIMEOUT_DISK; 104602b1a746SChristoph Hellwig else 104702b1a746SChristoph Hellwig req->timeout = PS_TIMEOUT_OTHER; 104802b1a746SChristoph Hellwig req->retries = PS_RETRY; 104902b1a746SChristoph Hellwig 105002b1a746SChristoph Hellwig blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, 105168d81f40SChristoph Hellwig (cmd->sam_task_attr == TCM_HEAD_TAG), 105202b1a746SChristoph Hellwig pscsi_req_done); 105302b1a746SChristoph Hellwig 105403e98c9eSNicholas Bellinger return 0; 105502b1a746SChristoph Hellwig 10565787cacdSChristoph Hellwig fail_free_bio: 105702b1a746SChristoph Hellwig while (hbio) { 105802b1a746SChristoph Hellwig struct bio *bio = hbio; 105902b1a746SChristoph Hellwig hbio = hbio->bi_next; 106002b1a746SChristoph Hellwig bio_endio(bio, 0); /* XXX: should be error */ 106102b1a746SChristoph Hellwig } 1062de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 10635787cacdSChristoph Hellwig fail: 10645787cacdSChristoph Hellwig kfree(pt); 1065de103c93SChristoph Hellwig return ret; 106602b1a746SChristoph Hellwig } 106702b1a746SChristoph Hellwig 1068c66ac9dbSNicholas Bellinger /* pscsi_get_device_type(): 1069c66ac9dbSNicholas Bellinger * 1070c66ac9dbSNicholas Bellinger * 1071c66ac9dbSNicholas Bellinger */ 1072c66ac9dbSNicholas Bellinger static u32 pscsi_get_device_type(struct se_device *dev) 1073c66ac9dbSNicholas Bellinger { 10740fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 1075c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 1076c66ac9dbSNicholas Bellinger 1077215a8fe4SNicholas Bellinger return (sd) ? sd->type : TYPE_NO_LUN; 1078c66ac9dbSNicholas Bellinger } 1079c66ac9dbSNicholas Bellinger 1080c66ac9dbSNicholas Bellinger static sector_t pscsi_get_blocks(struct se_device *dev) 1081c66ac9dbSNicholas Bellinger { 10820fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 1083c66ac9dbSNicholas Bellinger 1084c66ac9dbSNicholas Bellinger if (pdv->pdv_bd && pdv->pdv_bd->bd_part) 1085c66ac9dbSNicholas Bellinger return pdv->pdv_bd->bd_part->nr_sects; 1086c66ac9dbSNicholas Bellinger 1087c66ac9dbSNicholas Bellinger dump_stack(); 1088c66ac9dbSNicholas Bellinger return 0; 1089c66ac9dbSNicholas Bellinger } 1090c66ac9dbSNicholas Bellinger 10915787cacdSChristoph Hellwig static void pscsi_req_done(struct request *req, int uptodate) 1092c66ac9dbSNicholas Bellinger { 10935787cacdSChristoph Hellwig struct se_cmd *cmd = req->end_io_data; 10945787cacdSChristoph Hellwig struct pscsi_plugin_task *pt = cmd->priv; 10955787cacdSChristoph Hellwig 10965787cacdSChristoph Hellwig pt->pscsi_result = req->errors; 10975787cacdSChristoph Hellwig pt->pscsi_resid = req->resid_len; 10985787cacdSChristoph Hellwig 10995787cacdSChristoph Hellwig cmd->scsi_status = status_byte(pt->pscsi_result) << 1; 11005787cacdSChristoph Hellwig if (cmd->scsi_status) { 11015787cacdSChristoph Hellwig pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" 11025787cacdSChristoph Hellwig " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], 1103c66ac9dbSNicholas Bellinger pt->pscsi_result); 1104c66ac9dbSNicholas Bellinger } 1105c66ac9dbSNicholas Bellinger 1106c66ac9dbSNicholas Bellinger switch (host_byte(pt->pscsi_result)) { 1107c66ac9dbSNicholas Bellinger case DID_OK: 11085787cacdSChristoph Hellwig target_complete_cmd(cmd, cmd->scsi_status); 1109c66ac9dbSNicholas Bellinger break; 1110c66ac9dbSNicholas Bellinger default: 11115787cacdSChristoph Hellwig pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" 11125787cacdSChristoph Hellwig " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], 1113c66ac9dbSNicholas Bellinger pt->pscsi_result); 11145787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); 1115c66ac9dbSNicholas Bellinger break; 1116c66ac9dbSNicholas Bellinger } 1117c66ac9dbSNicholas Bellinger 1118c66ac9dbSNicholas Bellinger __blk_put_request(req->q, req); 11195787cacdSChristoph Hellwig kfree(pt); 1120c66ac9dbSNicholas Bellinger } 1121c66ac9dbSNicholas Bellinger 11226cfb546bSNicholas Bellinger DEF_TB_DEV_ATTRIB_RO(pscsi, hw_pi_prot_type); 11236cfb546bSNicholas Bellinger TB_DEV_ATTR_RO(pscsi, hw_pi_prot_type); 11246cfb546bSNicholas Bellinger 11256cfb546bSNicholas Bellinger DEF_TB_DEV_ATTRIB_RO(pscsi, hw_block_size); 11266cfb546bSNicholas Bellinger TB_DEV_ATTR_RO(pscsi, hw_block_size); 11276cfb546bSNicholas Bellinger 11286cfb546bSNicholas Bellinger DEF_TB_DEV_ATTRIB_RO(pscsi, hw_max_sectors); 11296cfb546bSNicholas Bellinger TB_DEV_ATTR_RO(pscsi, hw_max_sectors); 11306cfb546bSNicholas Bellinger 11316cfb546bSNicholas Bellinger DEF_TB_DEV_ATTRIB_RO(pscsi, hw_queue_depth); 11326cfb546bSNicholas Bellinger TB_DEV_ATTR_RO(pscsi, hw_queue_depth); 11336cfb546bSNicholas Bellinger 11346cfb546bSNicholas Bellinger static struct configfs_attribute *pscsi_backend_dev_attrs[] = { 11356cfb546bSNicholas Bellinger &pscsi_dev_attrib_hw_pi_prot_type.attr, 11366cfb546bSNicholas Bellinger &pscsi_dev_attrib_hw_block_size.attr, 11376cfb546bSNicholas Bellinger &pscsi_dev_attrib_hw_max_sectors.attr, 11386cfb546bSNicholas Bellinger &pscsi_dev_attrib_hw_queue_depth.attr, 11396cfb546bSNicholas Bellinger NULL, 11406cfb546bSNicholas Bellinger }; 11416cfb546bSNicholas Bellinger 11420a06d430SChristoph Hellwig static const struct target_backend_ops pscsi_ops = { 1143c66ac9dbSNicholas Bellinger .name = "pscsi", 1144c66ac9dbSNicholas Bellinger .owner = THIS_MODULE, 1145a3541703SAndy Grover .transport_flags = TRANSPORT_FLAG_PASSTHROUGH, 1146c66ac9dbSNicholas Bellinger .attach_hba = pscsi_attach_hba, 1147c66ac9dbSNicholas Bellinger .detach_hba = pscsi_detach_hba, 1148c66ac9dbSNicholas Bellinger .pmode_enable_hba = pscsi_pmode_enable_hba, 11490fd97ccfSChristoph Hellwig .alloc_device = pscsi_alloc_device, 11500fd97ccfSChristoph Hellwig .configure_device = pscsi_configure_device, 1151c66ac9dbSNicholas Bellinger .free_device = pscsi_free_device, 1152c66ac9dbSNicholas Bellinger .transport_complete = pscsi_transport_complete, 1153d6e0175cSChristoph Hellwig .parse_cdb = pscsi_parse_cdb, 1154c66ac9dbSNicholas Bellinger .set_configfs_dev_params = pscsi_set_configfs_dev_params, 1155c66ac9dbSNicholas Bellinger .show_configfs_dev_params = pscsi_show_configfs_dev_params, 1156c66ac9dbSNicholas Bellinger .get_device_type = pscsi_get_device_type, 1157c66ac9dbSNicholas Bellinger .get_blocks = pscsi_get_blocks, 11580a06d430SChristoph Hellwig .tb_dev_attrib_attrs = pscsi_backend_dev_attrs, 1159c66ac9dbSNicholas Bellinger }; 1160c66ac9dbSNicholas Bellinger 1161c66ac9dbSNicholas Bellinger static int __init pscsi_module_init(void) 1162c66ac9dbSNicholas Bellinger { 11630a06d430SChristoph Hellwig return transport_backend_register(&pscsi_ops); 1164c66ac9dbSNicholas Bellinger } 1165c66ac9dbSNicholas Bellinger 116663b91d5aSAsias He static void __exit pscsi_module_exit(void) 1167c66ac9dbSNicholas Bellinger { 11680a06d430SChristoph Hellwig target_backend_unregister(&pscsi_ops); 1169c66ac9dbSNicholas Bellinger } 1170c66ac9dbSNicholas Bellinger 1171c66ac9dbSNicholas Bellinger MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); 1172c66ac9dbSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 1173c66ac9dbSNicholas Bellinger MODULE_LICENSE("GPL"); 1174c66ac9dbSNicholas Bellinger 1175c66ac9dbSNicholas Bellinger module_init(pscsi_module_init); 1176c66ac9dbSNicholas Bellinger module_exit(pscsi_module_exit); 1177