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 60c66ac9dbSNicholas Bellinger static struct se_subsystem_api pscsi_template; 61c66ac9dbSNicholas Bellinger 62de103c93SChristoph Hellwig static sense_reason_t pscsi_execute_cmd(struct se_cmd *cmd); 63c66ac9dbSNicholas Bellinger static void pscsi_req_done(struct request *, int); 64c66ac9dbSNicholas Bellinger 65c66ac9dbSNicholas Bellinger /* pscsi_attach_hba(): 66c66ac9dbSNicholas Bellinger * 67c66ac9dbSNicholas Bellinger * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. 68c66ac9dbSNicholas Bellinger * from the passed SCSI Host ID. 69c66ac9dbSNicholas Bellinger */ 70c66ac9dbSNicholas Bellinger static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) 71c66ac9dbSNicholas Bellinger { 72c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv; 73c66ac9dbSNicholas Bellinger 74c66ac9dbSNicholas Bellinger phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); 756708bb27SAndy Grover if (!phv) { 766708bb27SAndy Grover pr_err("Unable to allocate struct pscsi_hba_virt\n"); 77e3d6f909SAndy Grover return -ENOMEM; 78c66ac9dbSNicholas Bellinger } 79c66ac9dbSNicholas Bellinger phv->phv_host_id = host_id; 80e6a8a41aSStefan Hajnoczi phv->phv_mode = PHV_VIRTUAL_HOST_ID; 81c66ac9dbSNicholas Bellinger 825951146dSAndy Grover hba->hba_ptr = phv; 83c66ac9dbSNicholas Bellinger 846708bb27SAndy Grover pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on" 85c66ac9dbSNicholas Bellinger " Generic Target Core Stack %s\n", hba->hba_id, 86c66ac9dbSNicholas Bellinger PSCSI_VERSION, TARGET_CORE_MOD_VERSION); 876708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n", 88e3d6f909SAndy Grover hba->hba_id); 89c66ac9dbSNicholas Bellinger 90c66ac9dbSNicholas Bellinger return 0; 91c66ac9dbSNicholas Bellinger } 92c66ac9dbSNicholas Bellinger 93c66ac9dbSNicholas Bellinger static void pscsi_detach_hba(struct se_hba *hba) 94c66ac9dbSNicholas Bellinger { 95c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 96c66ac9dbSNicholas Bellinger struct Scsi_Host *scsi_host = phv->phv_lld_host; 97c66ac9dbSNicholas Bellinger 98c66ac9dbSNicholas Bellinger if (scsi_host) { 99c66ac9dbSNicholas Bellinger scsi_host_put(scsi_host); 100c66ac9dbSNicholas Bellinger 1016708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from" 102c66ac9dbSNicholas Bellinger " Generic Target Core\n", hba->hba_id, 103c66ac9dbSNicholas Bellinger (scsi_host->hostt->name) ? (scsi_host->hostt->name) : 104c66ac9dbSNicholas Bellinger "Unknown"); 105c66ac9dbSNicholas Bellinger } else 1066708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA" 107c66ac9dbSNicholas Bellinger " from Generic Target Core\n", hba->hba_id); 108c66ac9dbSNicholas Bellinger 109c66ac9dbSNicholas Bellinger kfree(phv); 110c66ac9dbSNicholas Bellinger hba->hba_ptr = NULL; 111c66ac9dbSNicholas Bellinger } 112c66ac9dbSNicholas Bellinger 113c66ac9dbSNicholas Bellinger static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) 114c66ac9dbSNicholas Bellinger { 1158359cf43SJörn Engel struct pscsi_hba_virt *phv = hba->hba_ptr; 116c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 117c66ac9dbSNicholas Bellinger /* 118c66ac9dbSNicholas Bellinger * Release the struct Scsi_Host 119c66ac9dbSNicholas Bellinger */ 1206708bb27SAndy Grover if (!mode_flag) { 1216708bb27SAndy Grover if (!sh) 122c66ac9dbSNicholas Bellinger return 0; 123c66ac9dbSNicholas Bellinger 124c66ac9dbSNicholas Bellinger phv->phv_lld_host = NULL; 125e6a8a41aSStefan Hajnoczi phv->phv_mode = PHV_VIRTUAL_HOST_ID; 126c66ac9dbSNicholas Bellinger 1276708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" 128c66ac9dbSNicholas Bellinger " %s\n", hba->hba_id, (sh->hostt->name) ? 129c66ac9dbSNicholas Bellinger (sh->hostt->name) : "Unknown"); 130c66ac9dbSNicholas Bellinger 131c66ac9dbSNicholas Bellinger scsi_host_put(sh); 132c66ac9dbSNicholas Bellinger return 0; 133c66ac9dbSNicholas Bellinger } 134c66ac9dbSNicholas Bellinger /* 135c66ac9dbSNicholas Bellinger * Otherwise, locate struct Scsi_Host from the original passed 136c66ac9dbSNicholas Bellinger * pSCSI Host ID and enable for phba mode 137c66ac9dbSNicholas Bellinger */ 138e3d6f909SAndy Grover sh = scsi_host_lookup(phv->phv_host_id); 13958932e96SWei Yongjun if (!sh) { 1406708bb27SAndy Grover pr_err("pSCSI: Unable to locate SCSI Host for" 141c66ac9dbSNicholas Bellinger " phv_host_id: %d\n", phv->phv_host_id); 14258932e96SWei Yongjun return -EINVAL; 143c66ac9dbSNicholas Bellinger } 144c66ac9dbSNicholas Bellinger 145c66ac9dbSNicholas Bellinger phv->phv_lld_host = sh; 146c66ac9dbSNicholas Bellinger phv->phv_mode = PHV_LLD_SCSI_HOST_NO; 147c66ac9dbSNicholas Bellinger 1486708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", 149c66ac9dbSNicholas Bellinger hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); 150c66ac9dbSNicholas Bellinger 151c66ac9dbSNicholas Bellinger return 1; 152c66ac9dbSNicholas Bellinger } 153c66ac9dbSNicholas Bellinger 154c66ac9dbSNicholas Bellinger static void pscsi_tape_read_blocksize(struct se_device *dev, 155c66ac9dbSNicholas Bellinger struct scsi_device *sdev) 156c66ac9dbSNicholas Bellinger { 157c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 158c66ac9dbSNicholas Bellinger int ret; 159c66ac9dbSNicholas Bellinger 160c66ac9dbSNicholas Bellinger buf = kzalloc(12, GFP_KERNEL); 161c66ac9dbSNicholas Bellinger if (!buf) 162c66ac9dbSNicholas Bellinger return; 163c66ac9dbSNicholas Bellinger 164c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 165c66ac9dbSNicholas Bellinger cdb[0] = MODE_SENSE; 166c66ac9dbSNicholas Bellinger cdb[4] = 0x0c; /* 12 bytes */ 167c66ac9dbSNicholas Bellinger 168c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, 169c66ac9dbSNicholas Bellinger HZ, 1, NULL); 170c66ac9dbSNicholas Bellinger if (ret) 171c66ac9dbSNicholas Bellinger goto out_free; 172c66ac9dbSNicholas Bellinger 173c66ac9dbSNicholas Bellinger /* 174c66ac9dbSNicholas Bellinger * If MODE_SENSE still returns zero, set the default value to 1024. 175c66ac9dbSNicholas Bellinger */ 176c66ac9dbSNicholas Bellinger sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); 177c66ac9dbSNicholas Bellinger if (!sdev->sector_size) 178c66ac9dbSNicholas Bellinger sdev->sector_size = 1024; 179c66ac9dbSNicholas Bellinger out_free: 180c66ac9dbSNicholas Bellinger kfree(buf); 181c66ac9dbSNicholas Bellinger } 182c66ac9dbSNicholas Bellinger 183c66ac9dbSNicholas Bellinger static void 184c66ac9dbSNicholas Bellinger pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) 185c66ac9dbSNicholas Bellinger { 186c66ac9dbSNicholas Bellinger unsigned char *buf; 187c66ac9dbSNicholas Bellinger 188c66ac9dbSNicholas Bellinger if (sdev->inquiry_len < INQUIRY_LEN) 189c66ac9dbSNicholas Bellinger return; 190c66ac9dbSNicholas Bellinger 191c66ac9dbSNicholas Bellinger buf = sdev->inquiry; 192c66ac9dbSNicholas Bellinger if (!buf) 193c66ac9dbSNicholas Bellinger return; 194c66ac9dbSNicholas Bellinger /* 195c66ac9dbSNicholas Bellinger * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() 196c66ac9dbSNicholas Bellinger */ 197c66ac9dbSNicholas Bellinger memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); 198c66ac9dbSNicholas Bellinger memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); 199c66ac9dbSNicholas Bellinger memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); 200c66ac9dbSNicholas Bellinger } 201c66ac9dbSNicholas Bellinger 202c66ac9dbSNicholas Bellinger static int 203c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) 204c66ac9dbSNicholas Bellinger { 205c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 206c66ac9dbSNicholas Bellinger int ret; 207c66ac9dbSNicholas Bellinger 208c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 209c66ac9dbSNicholas Bellinger if (!buf) 210e3d6f909SAndy Grover return -ENOMEM; 211c66ac9dbSNicholas Bellinger 212c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 213c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 214c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 215c66ac9dbSNicholas Bellinger cdb[2] = 0x80; /* Unit Serial Number */ 216c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; 217c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); 218c66ac9dbSNicholas Bellinger 219c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 220c66ac9dbSNicholas Bellinger INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); 221c66ac9dbSNicholas Bellinger if (ret) 222c66ac9dbSNicholas Bellinger goto out_free; 223c66ac9dbSNicholas Bellinger 224c66ac9dbSNicholas Bellinger snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); 225c66ac9dbSNicholas Bellinger 2260fd97ccfSChristoph Hellwig wwn->t10_dev->dev_flags |= DF_FIRMWARE_VPD_UNIT_SERIAL; 227c66ac9dbSNicholas Bellinger 228c66ac9dbSNicholas Bellinger kfree(buf); 229c66ac9dbSNicholas Bellinger return 0; 230c66ac9dbSNicholas Bellinger 231c66ac9dbSNicholas Bellinger out_free: 232c66ac9dbSNicholas Bellinger kfree(buf); 233e3d6f909SAndy Grover return -EPERM; 234c66ac9dbSNicholas Bellinger } 235c66ac9dbSNicholas Bellinger 236c66ac9dbSNicholas Bellinger static void 237c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, 238c66ac9dbSNicholas Bellinger struct t10_wwn *wwn) 239c66ac9dbSNicholas Bellinger { 240c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; 241c66ac9dbSNicholas Bellinger int ident_len, page_len, off = 4, ret; 242c66ac9dbSNicholas Bellinger struct t10_vpd *vpd; 243c66ac9dbSNicholas Bellinger 244c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 245c66ac9dbSNicholas Bellinger if (!buf) 246c66ac9dbSNicholas Bellinger return; 247c66ac9dbSNicholas Bellinger 248c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 249c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 250c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 251c66ac9dbSNicholas Bellinger cdb[2] = 0x83; /* Device Identifier */ 252c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; 253c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); 254c66ac9dbSNicholas Bellinger 255c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 256c66ac9dbSNicholas Bellinger INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, 257c66ac9dbSNicholas Bellinger NULL, HZ, 1, NULL); 258c66ac9dbSNicholas Bellinger if (ret) 259c66ac9dbSNicholas Bellinger goto out; 260c66ac9dbSNicholas Bellinger 261c66ac9dbSNicholas Bellinger page_len = (buf[2] << 8) | buf[3]; 262c66ac9dbSNicholas Bellinger while (page_len > 0) { 263c66ac9dbSNicholas Bellinger /* Grab a pointer to the Identification descriptor */ 264c66ac9dbSNicholas Bellinger page_83 = &buf[off]; 265c66ac9dbSNicholas Bellinger ident_len = page_83[3]; 266c66ac9dbSNicholas Bellinger if (!ident_len) { 2676708bb27SAndy Grover pr_err("page_83[3]: identifier" 268c66ac9dbSNicholas Bellinger " length zero!\n"); 269c66ac9dbSNicholas Bellinger break; 270c66ac9dbSNicholas Bellinger } 27135d1efe8SMasanari Iida pr_debug("T10 VPD Identifier Length: %d\n", ident_len); 272c66ac9dbSNicholas Bellinger 273c66ac9dbSNicholas Bellinger vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); 274c66ac9dbSNicholas Bellinger if (!vpd) { 2756708bb27SAndy Grover pr_err("Unable to allocate memory for" 276c66ac9dbSNicholas Bellinger " struct t10_vpd\n"); 277c66ac9dbSNicholas Bellinger goto out; 278c66ac9dbSNicholas Bellinger } 279c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&vpd->vpd_list); 280c66ac9dbSNicholas Bellinger 281c66ac9dbSNicholas Bellinger transport_set_vpd_proto_id(vpd, page_83); 282c66ac9dbSNicholas Bellinger transport_set_vpd_assoc(vpd, page_83); 283c66ac9dbSNicholas Bellinger 284c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident_type(vpd, page_83) < 0) { 285c66ac9dbSNicholas Bellinger off += (ident_len + 4); 286c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 287c66ac9dbSNicholas Bellinger kfree(vpd); 288c66ac9dbSNicholas Bellinger continue; 289c66ac9dbSNicholas Bellinger } 290c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident(vpd, page_83) < 0) { 291c66ac9dbSNicholas Bellinger off += (ident_len + 4); 292c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 293c66ac9dbSNicholas Bellinger kfree(vpd); 294c66ac9dbSNicholas Bellinger continue; 295c66ac9dbSNicholas Bellinger } 296c66ac9dbSNicholas Bellinger 297c66ac9dbSNicholas Bellinger list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); 298c66ac9dbSNicholas Bellinger off += (ident_len + 4); 299c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 300c66ac9dbSNicholas Bellinger } 301c66ac9dbSNicholas Bellinger 302c66ac9dbSNicholas Bellinger out: 303c66ac9dbSNicholas Bellinger kfree(buf); 304c66ac9dbSNicholas Bellinger } 305c66ac9dbSNicholas Bellinger 3060fd97ccfSChristoph Hellwig static int pscsi_add_device_to_list(struct se_device *dev, 3070fd97ccfSChristoph Hellwig struct scsi_device *sd) 308c66ac9dbSNicholas Bellinger { 3090fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 3100fd97ccfSChristoph Hellwig struct request_queue *q = sd->request_queue; 311c66ac9dbSNicholas Bellinger 3120fd97ccfSChristoph Hellwig pdv->pdv_sd = sd; 313c66ac9dbSNicholas Bellinger 314c66ac9dbSNicholas Bellinger if (!sd->queue_depth) { 315c66ac9dbSNicholas Bellinger sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; 316c66ac9dbSNicholas Bellinger 3179cb78c16SHannes Reinecke pr_err("Set broken SCSI Device %d:%d:%llu" 318c66ac9dbSNicholas Bellinger " queue_depth to %d\n", sd->channel, sd->id, 319c66ac9dbSNicholas Bellinger sd->lun, sd->queue_depth); 320c66ac9dbSNicholas Bellinger } 3210fd97ccfSChristoph Hellwig 3220fd97ccfSChristoph Hellwig dev->dev_attrib.hw_block_size = sd->sector_size; 3230fd97ccfSChristoph Hellwig dev->dev_attrib.hw_max_sectors = 3240fd97ccfSChristoph Hellwig min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q)); 3250fd97ccfSChristoph Hellwig dev->dev_attrib.hw_queue_depth = sd->queue_depth; 3260fd97ccfSChristoph Hellwig 327c66ac9dbSNicholas Bellinger /* 328c66ac9dbSNicholas Bellinger * Setup our standard INQUIRY info into se_dev->t10_wwn 329c66ac9dbSNicholas Bellinger */ 3300fd97ccfSChristoph Hellwig pscsi_set_inquiry_info(sd, &dev->t10_wwn); 331c66ac9dbSNicholas Bellinger 332c66ac9dbSNicholas Bellinger /* 333c66ac9dbSNicholas Bellinger * Locate VPD WWN Information used for various purposes within 334c66ac9dbSNicholas Bellinger * the Storage Engine. 335c66ac9dbSNicholas Bellinger */ 3360fd97ccfSChristoph Hellwig if (!pscsi_get_inquiry_vpd_serial(sd, &dev->t10_wwn)) { 337c66ac9dbSNicholas Bellinger /* 338c66ac9dbSNicholas Bellinger * If VPD Unit Serial returned GOOD status, try 339c66ac9dbSNicholas Bellinger * VPD Device Identification page (0x83). 340c66ac9dbSNicholas Bellinger */ 3410fd97ccfSChristoph Hellwig pscsi_get_inquiry_vpd_device_ident(sd, &dev->t10_wwn); 342c66ac9dbSNicholas Bellinger } 343c66ac9dbSNicholas Bellinger 344c66ac9dbSNicholas Bellinger /* 345c66ac9dbSNicholas Bellinger * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. 346c66ac9dbSNicholas Bellinger */ 347c66ac9dbSNicholas Bellinger if (sd->type == TYPE_TAPE) 348c66ac9dbSNicholas Bellinger pscsi_tape_read_blocksize(dev, sd); 3490fd97ccfSChristoph Hellwig return 0; 350c66ac9dbSNicholas Bellinger } 351c66ac9dbSNicholas Bellinger 3520fd97ccfSChristoph Hellwig static struct se_device *pscsi_alloc_device(struct se_hba *hba, 3530fd97ccfSChristoph Hellwig const char *name) 354c66ac9dbSNicholas Bellinger { 355c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv; 356c66ac9dbSNicholas Bellinger 357c66ac9dbSNicholas Bellinger pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); 3586708bb27SAndy Grover if (!pdv) { 3596708bb27SAndy Grover pr_err("Unable to allocate memory for struct pscsi_dev_virt\n"); 360c66ac9dbSNicholas Bellinger return NULL; 361c66ac9dbSNicholas Bellinger } 362c66ac9dbSNicholas Bellinger 3636708bb27SAndy Grover pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name); 3640fd97ccfSChristoph Hellwig return &pdv->dev; 365c66ac9dbSNicholas Bellinger } 366c66ac9dbSNicholas Bellinger 367c66ac9dbSNicholas Bellinger /* 368c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 369c66ac9dbSNicholas Bellinger */ 3700fd97ccfSChristoph Hellwig static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd) 3715dd7ed2eSDan Carpenter __releases(sh->host_lock) 372c66ac9dbSNicholas Bellinger { 3730fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 3740fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 375c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 376c66ac9dbSNicholas Bellinger struct block_device *bd; 3770fd97ccfSChristoph Hellwig int ret; 378c66ac9dbSNicholas Bellinger 379c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 3809cb78c16SHannes Reinecke pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n", 381c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 382c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 3830fd97ccfSChristoph Hellwig return -EIO; 384c66ac9dbSNicholas Bellinger } 385c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 386c66ac9dbSNicholas Bellinger /* 387c66ac9dbSNicholas Bellinger * Claim exclusive struct block_device access to struct scsi_device 388c66ac9dbSNicholas Bellinger * for TYPE_DISK using supplied udev_path 389c66ac9dbSNicholas Bellinger */ 3900fd97ccfSChristoph Hellwig bd = blkdev_get_by_path(dev->udev_path, 391c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); 3923ae279d2SDan Carpenter if (IS_ERR(bd)) { 3936708bb27SAndy Grover pr_err("pSCSI: blkdev_get_by_path() failed\n"); 394c66ac9dbSNicholas Bellinger scsi_device_put(sd); 3950fd97ccfSChristoph Hellwig return PTR_ERR(bd); 396c66ac9dbSNicholas Bellinger } 397c66ac9dbSNicholas Bellinger pdv->pdv_bd = bd; 398c66ac9dbSNicholas Bellinger 3990fd97ccfSChristoph Hellwig ret = pscsi_add_device_to_list(dev, sd); 4000fd97ccfSChristoph Hellwig if (ret) { 401c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); 402c66ac9dbSNicholas Bellinger scsi_device_put(sd); 4030fd97ccfSChristoph Hellwig return ret; 404c66ac9dbSNicholas Bellinger } 4050fd97ccfSChristoph Hellwig 4069cb78c16SHannes Reinecke pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%llu\n", 407c66ac9dbSNicholas Bellinger phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); 4080fd97ccfSChristoph Hellwig return 0; 409c66ac9dbSNicholas Bellinger } 410c66ac9dbSNicholas Bellinger 411c66ac9dbSNicholas Bellinger /* 412c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 413c66ac9dbSNicholas Bellinger */ 4140fd97ccfSChristoph Hellwig static int pscsi_create_type_rom(struct se_device *dev, struct scsi_device *sd) 4155dd7ed2eSDan Carpenter __releases(sh->host_lock) 416c66ac9dbSNicholas Bellinger { 4170fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 418c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 4190fd97ccfSChristoph Hellwig int ret; 420c66ac9dbSNicholas Bellinger 421c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 4229cb78c16SHannes Reinecke pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n", 423c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 424c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 4250fd97ccfSChristoph Hellwig return -EIO; 426c66ac9dbSNicholas Bellinger } 427c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 428c66ac9dbSNicholas Bellinger 4290fd97ccfSChristoph Hellwig ret = pscsi_add_device_to_list(dev, sd); 4300fd97ccfSChristoph Hellwig if (ret) { 431c66ac9dbSNicholas Bellinger scsi_device_put(sd); 4320fd97ccfSChristoph Hellwig return ret; 433c66ac9dbSNicholas Bellinger } 4349cb78c16SHannes Reinecke pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n", 435c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 436c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 437c66ac9dbSNicholas Bellinger 4380fd97ccfSChristoph Hellwig return 0; 439c66ac9dbSNicholas Bellinger } 440c66ac9dbSNicholas Bellinger 441c66ac9dbSNicholas Bellinger /* 442c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 443c66ac9dbSNicholas Bellinger */ 4440fd97ccfSChristoph Hellwig static int pscsi_create_type_other(struct se_device *dev, 4450fd97ccfSChristoph Hellwig struct scsi_device *sd) 4465dd7ed2eSDan Carpenter __releases(sh->host_lock) 447c66ac9dbSNicholas Bellinger { 4480fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 449c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 4500fd97ccfSChristoph Hellwig int ret; 451c66ac9dbSNicholas Bellinger 452c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 4530fd97ccfSChristoph Hellwig ret = pscsi_add_device_to_list(dev, sd); 4540fd97ccfSChristoph Hellwig if (ret) 4550fd97ccfSChristoph Hellwig return ret; 456c66ac9dbSNicholas Bellinger 4579cb78c16SHannes Reinecke pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n", 458c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 459c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 4600fd97ccfSChristoph Hellwig return 0; 461c66ac9dbSNicholas Bellinger } 462c66ac9dbSNicholas Bellinger 463ecf0dd66SFengguang Wu static int pscsi_configure_device(struct se_device *dev) 464c66ac9dbSNicholas Bellinger { 4650fd97ccfSChristoph Hellwig struct se_hba *hba = dev->se_hba; 4660fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 467c66ac9dbSNicholas Bellinger struct scsi_device *sd; 4680fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 469c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 470c66ac9dbSNicholas Bellinger int legacy_mode_enable = 0; 4710fd97ccfSChristoph Hellwig int ret; 472c66ac9dbSNicholas Bellinger 4730fd97ccfSChristoph Hellwig if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || 4740fd97ccfSChristoph Hellwig !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || 4750fd97ccfSChristoph Hellwig !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { 4760fd97ccfSChristoph Hellwig pr_err("Missing scsi_channel_id=, scsi_target_id= and" 4770fd97ccfSChristoph Hellwig " scsi_lun_id= parameters\n"); 4780fd97ccfSChristoph Hellwig return -EINVAL; 479c66ac9dbSNicholas Bellinger } 4800fd97ccfSChristoph Hellwig 481c66ac9dbSNicholas Bellinger /* 482c66ac9dbSNicholas Bellinger * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the 483c66ac9dbSNicholas Bellinger * struct Scsi_Host we will need to bring the TCM/pSCSI object online 484c66ac9dbSNicholas Bellinger */ 4856708bb27SAndy Grover if (!sh) { 486c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 4876708bb27SAndy Grover pr_err("pSCSI: Unable to locate struct" 488c66ac9dbSNicholas Bellinger " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); 4890fd97ccfSChristoph Hellwig return -ENODEV; 490c66ac9dbSNicholas Bellinger } 491c66ac9dbSNicholas Bellinger /* 492e6a8a41aSStefan Hajnoczi * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device 493c66ac9dbSNicholas Bellinger * reference, we enforce that udev_path has been set 494c66ac9dbSNicholas Bellinger */ 4950fd97ccfSChristoph Hellwig if (!(dev->dev_flags & DF_USING_UDEV_PATH)) { 4966708bb27SAndy Grover pr_err("pSCSI: udev_path attribute has not" 497c66ac9dbSNicholas Bellinger " been set before ENABLE=1\n"); 4980fd97ccfSChristoph Hellwig return -EINVAL; 499c66ac9dbSNicholas Bellinger } 500c66ac9dbSNicholas Bellinger /* 501e6a8a41aSStefan Hajnoczi * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID, 502c66ac9dbSNicholas Bellinger * use the original TCM hba ID to reference Linux/SCSI Host No 503c66ac9dbSNicholas Bellinger * and enable for PHV_LLD_SCSI_HOST_NO mode. 504c66ac9dbSNicholas Bellinger */ 505c66ac9dbSNicholas Bellinger if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { 5060fd97ccfSChristoph Hellwig if (hba->dev_count) { 5076708bb27SAndy Grover pr_err("pSCSI: Unable to set hba_mode" 508c66ac9dbSNicholas Bellinger " with active devices\n"); 5090fd97ccfSChristoph Hellwig return -EEXIST; 510c66ac9dbSNicholas Bellinger } 511c66ac9dbSNicholas Bellinger 512c66ac9dbSNicholas Bellinger if (pscsi_pmode_enable_hba(hba, 1) != 1) 5130fd97ccfSChristoph Hellwig return -ENODEV; 514c66ac9dbSNicholas Bellinger 515c66ac9dbSNicholas Bellinger legacy_mode_enable = 1; 516c66ac9dbSNicholas Bellinger hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 517c66ac9dbSNicholas Bellinger sh = phv->phv_lld_host; 518c66ac9dbSNicholas Bellinger } else { 519e3d6f909SAndy Grover sh = scsi_host_lookup(pdv->pdv_host_id); 52058932e96SWei Yongjun if (!sh) { 5216708bb27SAndy Grover pr_err("pSCSI: Unable to locate" 522c66ac9dbSNicholas Bellinger " pdv_host_id: %d\n", pdv->pdv_host_id); 52358932e96SWei Yongjun return -EINVAL; 524c66ac9dbSNicholas Bellinger } 5255a7125c6SAndy Grover pdv->pdv_lld_host = sh; 526c66ac9dbSNicholas Bellinger } 527c66ac9dbSNicholas Bellinger } else { 528e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) { 529e6a8a41aSStefan Hajnoczi pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while" 530c66ac9dbSNicholas Bellinger " struct Scsi_Host exists\n"); 5310fd97ccfSChristoph Hellwig return -EEXIST; 532c66ac9dbSNicholas Bellinger } 533c66ac9dbSNicholas Bellinger } 534c66ac9dbSNicholas Bellinger 535c66ac9dbSNicholas Bellinger spin_lock_irq(sh->host_lock); 536c66ac9dbSNicholas Bellinger list_for_each_entry(sd, &sh->__devices, siblings) { 537c66ac9dbSNicholas Bellinger if ((pdv->pdv_channel_id != sd->channel) || 538c66ac9dbSNicholas Bellinger (pdv->pdv_target_id != sd->id) || 539c66ac9dbSNicholas Bellinger (pdv->pdv_lun_id != sd->lun)) 540c66ac9dbSNicholas Bellinger continue; 541c66ac9dbSNicholas Bellinger /* 542c66ac9dbSNicholas Bellinger * Functions will release the held struct scsi_host->host_lock 543c66ac9dbSNicholas Bellinger * before calling calling pscsi_add_device_to_list() to register 544c66ac9dbSNicholas Bellinger * struct scsi_device with target_core_mod. 545c66ac9dbSNicholas Bellinger */ 546c66ac9dbSNicholas Bellinger switch (sd->type) { 547c66ac9dbSNicholas Bellinger case TYPE_DISK: 5480fd97ccfSChristoph Hellwig ret = pscsi_create_type_disk(dev, sd); 549c66ac9dbSNicholas Bellinger break; 550c66ac9dbSNicholas Bellinger case TYPE_ROM: 5510fd97ccfSChristoph Hellwig ret = pscsi_create_type_rom(dev, sd); 552c66ac9dbSNicholas Bellinger break; 553c66ac9dbSNicholas Bellinger default: 5540fd97ccfSChristoph Hellwig ret = pscsi_create_type_other(dev, sd); 555c66ac9dbSNicholas Bellinger break; 556c66ac9dbSNicholas Bellinger } 557c66ac9dbSNicholas Bellinger 5580fd97ccfSChristoph Hellwig if (ret) { 559e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 560c66ac9dbSNicholas Bellinger scsi_host_put(sh); 561c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 562c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 563c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 564c66ac9dbSNicholas Bellinger } 565c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 5660fd97ccfSChristoph Hellwig return ret; 567c66ac9dbSNicholas Bellinger } 5680fd97ccfSChristoph Hellwig return 0; 569c66ac9dbSNicholas Bellinger } 570c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 571c66ac9dbSNicholas Bellinger 5726708bb27SAndy Grover pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, 573c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); 574c66ac9dbSNicholas Bellinger 575e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 576c66ac9dbSNicholas Bellinger scsi_host_put(sh); 577c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 578c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 579c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 580c66ac9dbSNicholas Bellinger } 581c66ac9dbSNicholas Bellinger 5820fd97ccfSChristoph Hellwig return -ENODEV; 583c66ac9dbSNicholas Bellinger } 584c66ac9dbSNicholas Bellinger 5850fd97ccfSChristoph Hellwig static void pscsi_free_device(struct se_device *dev) 586c66ac9dbSNicholas Bellinger { 5870fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 5880fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 589c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 590c66ac9dbSNicholas Bellinger 591c66ac9dbSNicholas Bellinger if (sd) { 592c66ac9dbSNicholas Bellinger /* 593c66ac9dbSNicholas Bellinger * Release exclusive pSCSI internal struct block_device claim for 594c66ac9dbSNicholas Bellinger * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() 595c66ac9dbSNicholas Bellinger */ 596c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { 597c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, 598c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL); 599c66ac9dbSNicholas Bellinger pdv->pdv_bd = NULL; 600c66ac9dbSNicholas Bellinger } 601c66ac9dbSNicholas Bellinger /* 602c66ac9dbSNicholas Bellinger * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference 603c66ac9dbSNicholas Bellinger * to struct Scsi_Host now. 604c66ac9dbSNicholas Bellinger */ 605c66ac9dbSNicholas Bellinger if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && 606c66ac9dbSNicholas Bellinger (phv->phv_lld_host != NULL)) 607c66ac9dbSNicholas Bellinger scsi_host_put(phv->phv_lld_host); 6085a7125c6SAndy Grover else if (pdv->pdv_lld_host) 6095a7125c6SAndy Grover scsi_host_put(pdv->pdv_lld_host); 610c66ac9dbSNicholas Bellinger 611c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) 612c66ac9dbSNicholas Bellinger scsi_device_put(sd); 613c66ac9dbSNicholas Bellinger 614c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 615c66ac9dbSNicholas Bellinger } 616c66ac9dbSNicholas Bellinger 617c66ac9dbSNicholas Bellinger kfree(pdv); 618c66ac9dbSNicholas Bellinger } 619c66ac9dbSNicholas Bellinger 620d5829eacSPaolo Bonzini static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg, 621d5829eacSPaolo Bonzini unsigned char *sense_buffer) 622c66ac9dbSNicholas Bellinger { 6230fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); 624c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 625c66ac9dbSNicholas Bellinger int result; 6265787cacdSChristoph Hellwig struct pscsi_plugin_task *pt = cmd->priv; 6271d2a2cd9SNicholas Bellinger unsigned char *cdb; 6281d2a2cd9SNicholas Bellinger /* 6291d2a2cd9SNicholas Bellinger * Special case for REPORT_LUNs handling where pscsi_plugin_task has 6301d2a2cd9SNicholas Bellinger * not been allocated because TCM is handling the emulation directly. 6311d2a2cd9SNicholas Bellinger */ 6321d2a2cd9SNicholas Bellinger if (!pt) 633d5829eacSPaolo Bonzini return; 634c66ac9dbSNicholas Bellinger 6351d2a2cd9SNicholas Bellinger cdb = &pt->pscsi_cdb[0]; 636c66ac9dbSNicholas Bellinger result = pt->pscsi_result; 637c66ac9dbSNicholas Bellinger /* 638c66ac9dbSNicholas Bellinger * Hack to make sure that Write-Protect modepage is set if R/O mode is 639c66ac9dbSNicholas Bellinger * forced. 640c66ac9dbSNicholas Bellinger */ 64129a05deeSNicholas Bellinger if (!cmd->data_length) 642c66ac9dbSNicholas Bellinger goto after_mode_sense; 643c66ac9dbSNicholas Bellinger 644306c11b2SPaolo Bonzini if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && 645306c11b2SPaolo Bonzini (status_byte(result) << 1) == SAM_STAT_GOOD) { 64629a05deeSNicholas Bellinger bool read_only = target_lun_is_rdonly(cmd); 64729a05deeSNicholas Bellinger 64829a05deeSNicholas Bellinger if (read_only) { 649de103c93SChristoph Hellwig unsigned char *buf; 650de103c93SChristoph Hellwig 651de103c93SChristoph Hellwig buf = transport_kmap_data_sg(cmd); 652de103c93SChristoph Hellwig if (!buf) 653de103c93SChristoph Hellwig ; /* XXX: TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE */ 654c66ac9dbSNicholas Bellinger 655c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SENSE_10) { 656c66ac9dbSNicholas Bellinger if (!(buf[3] & 0x80)) 657c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 658c66ac9dbSNicholas Bellinger } else { 659c66ac9dbSNicholas Bellinger if (!(buf[2] & 0x80)) 660c66ac9dbSNicholas Bellinger buf[2] |= 0x80; 661c66ac9dbSNicholas Bellinger } 66205d1c7c0SAndy Grover 6635787cacdSChristoph Hellwig transport_kunmap_data_sg(cmd); 664c66ac9dbSNicholas Bellinger } 665c66ac9dbSNicholas Bellinger } 666c66ac9dbSNicholas Bellinger after_mode_sense: 667c66ac9dbSNicholas Bellinger 668306c11b2SPaolo Bonzini if (sd->type != TYPE_TAPE || !cmd->data_length) 669c66ac9dbSNicholas Bellinger goto after_mode_select; 670c66ac9dbSNicholas Bellinger 671c66ac9dbSNicholas Bellinger /* 672c66ac9dbSNicholas Bellinger * Hack to correctly obtain the initiator requested blocksize for 673c66ac9dbSNicholas Bellinger * TYPE_TAPE. Since this value is dependent upon each tape media, 674c66ac9dbSNicholas Bellinger * struct scsi_device->sector_size will not contain the correct value 675c66ac9dbSNicholas Bellinger * by default, so we go ahead and set it so 676c66ac9dbSNicholas Bellinger * TRANSPORT(dev)->get_blockdev() returns the correct value to the 677c66ac9dbSNicholas Bellinger * storage engine. 678c66ac9dbSNicholas Bellinger */ 679c66ac9dbSNicholas Bellinger if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && 680c66ac9dbSNicholas Bellinger (status_byte(result) << 1) == SAM_STAT_GOOD) { 681c66ac9dbSNicholas Bellinger unsigned char *buf; 682c66ac9dbSNicholas Bellinger u16 bdl; 683c66ac9dbSNicholas Bellinger u32 blocksize; 684c66ac9dbSNicholas Bellinger 685c66ac9dbSNicholas Bellinger buf = sg_virt(&sg[0]); 6866708bb27SAndy Grover if (!buf) { 6876708bb27SAndy Grover pr_err("Unable to get buf for scatterlist\n"); 688c66ac9dbSNicholas Bellinger goto after_mode_select; 689c66ac9dbSNicholas Bellinger } 690c66ac9dbSNicholas Bellinger 691c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 692c66ac9dbSNicholas Bellinger bdl = (buf[3]); 693c66ac9dbSNicholas Bellinger else 694c66ac9dbSNicholas Bellinger bdl = (buf[6] << 8) | (buf[7]); 695c66ac9dbSNicholas Bellinger 696c66ac9dbSNicholas Bellinger if (!bdl) 697c66ac9dbSNicholas Bellinger goto after_mode_select; 698c66ac9dbSNicholas Bellinger 699c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 700c66ac9dbSNicholas Bellinger blocksize = (buf[9] << 16) | (buf[10] << 8) | 701c66ac9dbSNicholas Bellinger (buf[11]); 702c66ac9dbSNicholas Bellinger else 703c66ac9dbSNicholas Bellinger blocksize = (buf[13] << 16) | (buf[14] << 8) | 704c66ac9dbSNicholas Bellinger (buf[15]); 705c66ac9dbSNicholas Bellinger 706c66ac9dbSNicholas Bellinger sd->sector_size = blocksize; 707c66ac9dbSNicholas Bellinger } 708c66ac9dbSNicholas Bellinger after_mode_select: 709c66ac9dbSNicholas Bellinger 710d5829eacSPaolo Bonzini if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) { 711d5829eacSPaolo Bonzini memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER); 712d5829eacSPaolo Bonzini cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; 713d5829eacSPaolo Bonzini } 714c66ac9dbSNicholas Bellinger } 715c66ac9dbSNicholas Bellinger 716c66ac9dbSNicholas Bellinger enum { 717c66ac9dbSNicholas Bellinger Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, 718c66ac9dbSNicholas Bellinger Opt_scsi_lun_id, Opt_err 719c66ac9dbSNicholas Bellinger }; 720c66ac9dbSNicholas Bellinger 721c66ac9dbSNicholas Bellinger static match_table_t tokens = { 722c66ac9dbSNicholas Bellinger {Opt_scsi_host_id, "scsi_host_id=%d"}, 723c66ac9dbSNicholas Bellinger {Opt_scsi_channel_id, "scsi_channel_id=%d"}, 724c66ac9dbSNicholas Bellinger {Opt_scsi_target_id, "scsi_target_id=%d"}, 725c66ac9dbSNicholas Bellinger {Opt_scsi_lun_id, "scsi_lun_id=%d"}, 726c66ac9dbSNicholas Bellinger {Opt_err, NULL} 727c66ac9dbSNicholas Bellinger }; 728c66ac9dbSNicholas Bellinger 7290fd97ccfSChristoph Hellwig static ssize_t pscsi_set_configfs_dev_params(struct se_device *dev, 7300fd97ccfSChristoph Hellwig const char *page, ssize_t count) 731c66ac9dbSNicholas Bellinger { 7320fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 7330fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 734c66ac9dbSNicholas Bellinger char *orig, *ptr, *opts; 735c66ac9dbSNicholas Bellinger substring_t args[MAX_OPT_ARGS]; 736c66ac9dbSNicholas Bellinger int ret = 0, arg, token; 737c66ac9dbSNicholas Bellinger 738c66ac9dbSNicholas Bellinger opts = kstrdup(page, GFP_KERNEL); 739c66ac9dbSNicholas Bellinger if (!opts) 740c66ac9dbSNicholas Bellinger return -ENOMEM; 741c66ac9dbSNicholas Bellinger 742c66ac9dbSNicholas Bellinger orig = opts; 743c66ac9dbSNicholas Bellinger 74490c161b6SSebastian Andrzej Siewior while ((ptr = strsep(&opts, ",\n")) != NULL) { 745c66ac9dbSNicholas Bellinger if (!*ptr) 746c66ac9dbSNicholas Bellinger continue; 747c66ac9dbSNicholas Bellinger 748c66ac9dbSNicholas Bellinger token = match_token(ptr, tokens, args); 749c66ac9dbSNicholas Bellinger switch (token) { 750c66ac9dbSNicholas Bellinger case Opt_scsi_host_id: 751c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 7526708bb27SAndy Grover pr_err("PSCSI[%d]: Unable to accept" 753c66ac9dbSNicholas Bellinger " scsi_host_id while phv_mode ==" 754c66ac9dbSNicholas Bellinger " PHV_LLD_SCSI_HOST_NO\n", 755c66ac9dbSNicholas Bellinger phv->phv_host_id); 756c66ac9dbSNicholas Bellinger ret = -EINVAL; 757c66ac9dbSNicholas Bellinger goto out; 758c66ac9dbSNicholas Bellinger } 759ce31c1b0SJoern Engel ret = match_int(args, &arg); 760ce31c1b0SJoern Engel if (ret) 761ce31c1b0SJoern Engel goto out; 762c66ac9dbSNicholas Bellinger pdv->pdv_host_id = arg; 7636708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Host ID:" 764c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_host_id); 765c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; 766c66ac9dbSNicholas Bellinger break; 767c66ac9dbSNicholas Bellinger case Opt_scsi_channel_id: 768ce31c1b0SJoern Engel ret = match_int(args, &arg); 769ce31c1b0SJoern Engel if (ret) 770ce31c1b0SJoern Engel goto out; 771c66ac9dbSNicholas Bellinger pdv->pdv_channel_id = arg; 7726708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Channel" 773c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 774c66ac9dbSNicholas Bellinger pdv->pdv_channel_id); 775c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; 776c66ac9dbSNicholas Bellinger break; 777c66ac9dbSNicholas Bellinger case Opt_scsi_target_id: 778ce31c1b0SJoern Engel ret = match_int(args, &arg); 779ce31c1b0SJoern Engel if (ret) 780ce31c1b0SJoern Engel goto out; 781c66ac9dbSNicholas Bellinger pdv->pdv_target_id = arg; 7826708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Target" 783c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 784c66ac9dbSNicholas Bellinger pdv->pdv_target_id); 785c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_TARGET_ID; 786c66ac9dbSNicholas Bellinger break; 787c66ac9dbSNicholas Bellinger case Opt_scsi_lun_id: 788ce31c1b0SJoern Engel ret = match_int(args, &arg); 789ce31c1b0SJoern Engel if (ret) 790ce31c1b0SJoern Engel goto out; 791c66ac9dbSNicholas Bellinger pdv->pdv_lun_id = arg; 7926708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:" 793c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_lun_id); 794c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_LUN_ID; 795c66ac9dbSNicholas Bellinger break; 796c66ac9dbSNicholas Bellinger default: 797c66ac9dbSNicholas Bellinger break; 798c66ac9dbSNicholas Bellinger } 799c66ac9dbSNicholas Bellinger } 800c66ac9dbSNicholas Bellinger 801c66ac9dbSNicholas Bellinger out: 802c66ac9dbSNicholas Bellinger kfree(orig); 803c66ac9dbSNicholas Bellinger return (!ret) ? count : ret; 804c66ac9dbSNicholas Bellinger } 805c66ac9dbSNicholas Bellinger 8060fd97ccfSChristoph Hellwig static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b) 807c66ac9dbSNicholas Bellinger { 8080fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 8090fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 810c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 811c66ac9dbSNicholas Bellinger unsigned char host_id[16]; 812c66ac9dbSNicholas Bellinger ssize_t bl; 813c66ac9dbSNicholas Bellinger int i; 814c66ac9dbSNicholas Bellinger 815e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 816c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "%d", pdv->pdv_host_id); 817c66ac9dbSNicholas Bellinger else 818c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "PHBA Mode"); 819c66ac9dbSNicholas Bellinger 820c66ac9dbSNicholas Bellinger bl = sprintf(b, "SCSI Device Bus Location:" 821c66ac9dbSNicholas Bellinger " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", 822c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, 823c66ac9dbSNicholas Bellinger host_id); 824c66ac9dbSNicholas Bellinger 825c66ac9dbSNicholas Bellinger if (sd) { 826c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 827c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "Vendor: "); 828c66ac9dbSNicholas Bellinger for (i = 0; i < 8; i++) { 829c66ac9dbSNicholas Bellinger if (ISPRINT(sd->vendor[i])) /* printable character? */ 830c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->vendor[i]); 831c66ac9dbSNicholas Bellinger else 832c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 833c66ac9dbSNicholas Bellinger } 834c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Model: "); 835c66ac9dbSNicholas Bellinger for (i = 0; i < 16; i++) { 836c66ac9dbSNicholas Bellinger if (ISPRINT(sd->model[i])) /* printable character ? */ 837c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->model[i]); 838c66ac9dbSNicholas Bellinger else 839c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 840c66ac9dbSNicholas Bellinger } 841c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Rev: "); 842c66ac9dbSNicholas Bellinger for (i = 0; i < 4; i++) { 843c66ac9dbSNicholas Bellinger if (ISPRINT(sd->rev[i])) /* printable character ? */ 844c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->rev[i]); 845c66ac9dbSNicholas Bellinger else 846c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 847c66ac9dbSNicholas Bellinger } 848c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "\n"); 849c66ac9dbSNicholas Bellinger } 850c66ac9dbSNicholas Bellinger return bl; 851c66ac9dbSNicholas Bellinger } 852c66ac9dbSNicholas Bellinger 853c66ac9dbSNicholas Bellinger static void pscsi_bi_endio(struct bio *bio, int error) 854c66ac9dbSNicholas Bellinger { 855c66ac9dbSNicholas Bellinger bio_put(bio); 856c66ac9dbSNicholas Bellinger } 857c66ac9dbSNicholas Bellinger 8582dbe10a2SAsias He static inline struct bio *pscsi_get_bio(int nr_vecs) 859c66ac9dbSNicholas Bellinger { 860c66ac9dbSNicholas Bellinger struct bio *bio; 861c66ac9dbSNicholas Bellinger /* 862c66ac9dbSNicholas Bellinger * Use bio_malloc() following the comment in for bio -> struct request 863c66ac9dbSNicholas Bellinger * in block/blk-core.c:blk_make_request() 864c66ac9dbSNicholas Bellinger */ 8652dbe10a2SAsias He bio = bio_kmalloc(GFP_KERNEL, nr_vecs); 8666708bb27SAndy Grover if (!bio) { 8676708bb27SAndy Grover pr_err("PSCSI: bio_kmalloc() failed\n"); 868c66ac9dbSNicholas Bellinger return NULL; 869c66ac9dbSNicholas Bellinger } 870c66ac9dbSNicholas Bellinger bio->bi_end_io = pscsi_bi_endio; 871c66ac9dbSNicholas Bellinger 872c66ac9dbSNicholas Bellinger return bio; 873c66ac9dbSNicholas Bellinger } 874c66ac9dbSNicholas Bellinger 875de103c93SChristoph Hellwig static sense_reason_t 876de103c93SChristoph Hellwig pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, 877de103c93SChristoph Hellwig enum dma_data_direction data_direction, struct bio **hbio) 878c66ac9dbSNicholas Bellinger { 8790fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); 88002b1a746SChristoph Hellwig struct bio *bio = NULL, *tbio = NULL; 881c66ac9dbSNicholas Bellinger struct page *page; 882c66ac9dbSNicholas Bellinger struct scatterlist *sg; 8837a83aa4eSChristoph Hellwig u32 data_len = cmd->data_length, i, len, bytes, off; 8845787cacdSChristoph Hellwig int nr_pages = (cmd->data_length + sgl[0].offset + 885c66ac9dbSNicholas Bellinger PAGE_SIZE - 1) >> PAGE_SHIFT; 88603e98c9eSNicholas Bellinger int nr_vecs = 0, rc; 8875787cacdSChristoph Hellwig int rw = (data_direction == DMA_TO_DEVICE); 888c66ac9dbSNicholas Bellinger 88902b1a746SChristoph Hellwig *hbio = NULL; 89002b1a746SChristoph Hellwig 8916708bb27SAndy Grover pr_debug("PSCSI: nr_pages: %d\n", nr_pages); 892c66ac9dbSNicholas Bellinger 8935787cacdSChristoph Hellwig for_each_sg(sgl, sg, sgl_nents, i) { 894c66ac9dbSNicholas Bellinger page = sg_page(sg); 895c66ac9dbSNicholas Bellinger off = sg->offset; 896c66ac9dbSNicholas Bellinger len = sg->length; 897c66ac9dbSNicholas Bellinger 8986708bb27SAndy Grover pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i, 899c66ac9dbSNicholas Bellinger page, len, off); 900c66ac9dbSNicholas Bellinger 9018f27d487SAsias He /* 9028f27d487SAsias He * We only have one page of data in each sg element, 9038f27d487SAsias He * we can not cross a page boundary. 9048f27d487SAsias He */ 9058f27d487SAsias He if (off + len > PAGE_SIZE) 9068f27d487SAsias He goto fail; 9078f27d487SAsias He 9088f27d487SAsias He if (len > 0 && data_len > 0) { 909c66ac9dbSNicholas Bellinger bytes = min_t(unsigned int, len, PAGE_SIZE - off); 910c66ac9dbSNicholas Bellinger bytes = min(bytes, data_len); 911c66ac9dbSNicholas Bellinger 9126708bb27SAndy Grover if (!bio) { 913c66ac9dbSNicholas Bellinger nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); 914c66ac9dbSNicholas Bellinger nr_pages -= nr_vecs; 915c66ac9dbSNicholas Bellinger /* 916c66ac9dbSNicholas Bellinger * Calls bio_kmalloc() and sets bio->bi_end_io() 917c66ac9dbSNicholas Bellinger */ 918a1d8b49aSAndy Grover bio = pscsi_get_bio(nr_vecs); 9196708bb27SAndy Grover if (!bio) 920c66ac9dbSNicholas Bellinger goto fail; 921c66ac9dbSNicholas Bellinger 922c66ac9dbSNicholas Bellinger if (rw) 923c66ac9dbSNicholas Bellinger bio->bi_rw |= REQ_WRITE; 924c66ac9dbSNicholas Bellinger 9256708bb27SAndy Grover pr_debug("PSCSI: Allocated bio: %p," 926c66ac9dbSNicholas Bellinger " dir: %s nr_vecs: %d\n", bio, 927c66ac9dbSNicholas Bellinger (rw) ? "rw" : "r", nr_vecs); 928c66ac9dbSNicholas Bellinger /* 929c66ac9dbSNicholas Bellinger * Set *hbio pointer to handle the case: 930c66ac9dbSNicholas Bellinger * nr_pages > BIO_MAX_PAGES, where additional 931c66ac9dbSNicholas Bellinger * bios need to be added to complete a given 9325787cacdSChristoph Hellwig * command. 933c66ac9dbSNicholas Bellinger */ 93402b1a746SChristoph Hellwig if (!*hbio) 93502b1a746SChristoph Hellwig *hbio = tbio = bio; 936c66ac9dbSNicholas Bellinger else 937c66ac9dbSNicholas Bellinger tbio = tbio->bi_next = bio; 938c66ac9dbSNicholas Bellinger } 939c66ac9dbSNicholas Bellinger 9406708bb27SAndy Grover pr_debug("PSCSI: Calling bio_add_pc_page() i: %d" 941c66ac9dbSNicholas Bellinger " bio: %p page: %p len: %d off: %d\n", i, bio, 942c66ac9dbSNicholas Bellinger page, len, off); 943c66ac9dbSNicholas Bellinger 944c66ac9dbSNicholas Bellinger rc = bio_add_pc_page(pdv->pdv_sd->request_queue, 945c66ac9dbSNicholas Bellinger bio, page, bytes, off); 946c66ac9dbSNicholas Bellinger if (rc != bytes) 947c66ac9dbSNicholas Bellinger goto fail; 948c66ac9dbSNicholas Bellinger 9496708bb27SAndy Grover pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", 950c66ac9dbSNicholas Bellinger bio->bi_vcnt, nr_vecs); 951c66ac9dbSNicholas Bellinger 952c66ac9dbSNicholas Bellinger if (bio->bi_vcnt > nr_vecs) { 9536708bb27SAndy Grover pr_debug("PSCSI: Reached bio->bi_vcnt max:" 954c66ac9dbSNicholas Bellinger " %d i: %d bio: %p, allocating another" 955c66ac9dbSNicholas Bellinger " bio\n", bio->bi_vcnt, i, bio); 956c66ac9dbSNicholas Bellinger /* 957c66ac9dbSNicholas Bellinger * Clear the pointer so that another bio will 958c66ac9dbSNicholas Bellinger * be allocated with pscsi_get_bio() above, the 959c66ac9dbSNicholas Bellinger * current bio has already been set *tbio and 960c66ac9dbSNicholas Bellinger * bio->bi_next. 961c66ac9dbSNicholas Bellinger */ 962c66ac9dbSNicholas Bellinger bio = NULL; 963c66ac9dbSNicholas Bellinger } 964c66ac9dbSNicholas Bellinger 965c66ac9dbSNicholas Bellinger data_len -= bytes; 966c66ac9dbSNicholas Bellinger } 967c66ac9dbSNicholas Bellinger } 968c66ac9dbSNicholas Bellinger 969de103c93SChristoph Hellwig return 0; 970c66ac9dbSNicholas Bellinger fail: 97102b1a746SChristoph Hellwig while (*hbio) { 97202b1a746SChristoph Hellwig bio = *hbio; 97302b1a746SChristoph Hellwig *hbio = (*hbio)->bi_next; 97402b1a746SChristoph Hellwig bio_endio(bio, 0); /* XXX: should be error */ 975c66ac9dbSNicholas Bellinger } 976de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 977c66ac9dbSNicholas Bellinger } 978c66ac9dbSNicholas Bellinger 979de103c93SChristoph Hellwig static sense_reason_t 980de103c93SChristoph Hellwig pscsi_parse_cdb(struct se_cmd *cmd) 981d6e0175cSChristoph Hellwig { 982de103c93SChristoph Hellwig if (cmd->se_cmd_flags & SCF_BIDI) 983de103c93SChristoph Hellwig return TCM_UNSUPPORTED_SCSI_OPCODE; 984d6e0175cSChristoph Hellwig 9857bfea53bSAndy Grover return passthrough_parse_cdb(cmd, pscsi_execute_cmd); 9868de530a5SChristoph Hellwig } 987d6e0175cSChristoph Hellwig 988de103c93SChristoph Hellwig static sense_reason_t 989de103c93SChristoph Hellwig pscsi_execute_cmd(struct se_cmd *cmd) 990c66ac9dbSNicholas Bellinger { 9910c2ad7d1SChristoph Hellwig struct scatterlist *sgl = cmd->t_data_sg; 9920c2ad7d1SChristoph Hellwig u32 sgl_nents = cmd->t_data_nents; 9930c2ad7d1SChristoph Hellwig enum dma_data_direction data_direction = cmd->data_direction; 9940fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); 9955787cacdSChristoph Hellwig struct pscsi_plugin_task *pt; 99602b1a746SChristoph Hellwig struct request *req; 99702b1a746SChristoph Hellwig struct bio *hbio; 998de103c93SChristoph Hellwig sense_reason_t ret; 999c66ac9dbSNicholas Bellinger 10005787cacdSChristoph Hellwig /* 10015787cacdSChristoph Hellwig * Dynamically alloc cdb space, since it may be larger than 10025787cacdSChristoph Hellwig * TCM_MAX_COMMAND_SIZE 10035787cacdSChristoph Hellwig */ 10045787cacdSChristoph Hellwig pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL); 10055787cacdSChristoph Hellwig if (!pt) { 1006de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 10075787cacdSChristoph Hellwig } 10085787cacdSChristoph Hellwig cmd->priv = pt; 10095787cacdSChristoph Hellwig 1010ed3102c6SChristoph Hellwig memcpy(pt->pscsi_cdb, cmd->t_task_cdb, 1011ed3102c6SChristoph Hellwig scsi_command_size(cmd->t_task_cdb)); 1012485fd0d1SChristoph Hellwig 101364f1db38SChristoph Hellwig if (!sgl) { 101402b1a746SChristoph Hellwig req = blk_get_request(pdv->pdv_sd->request_queue, 10155787cacdSChristoph Hellwig (data_direction == DMA_TO_DEVICE), 101602b1a746SChristoph Hellwig GFP_KERNEL); 1017a492f075SJoe Lawrence if (IS_ERR(req)) { 1018fdb4c1f3SDan Carpenter pr_err("PSCSI: blk_get_request() failed\n"); 1019de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 10205787cacdSChristoph Hellwig goto fail; 102102b1a746SChristoph Hellwig } 1022f27b087bSJens Axboe 1023f27b087bSJens Axboe blk_rq_set_block_pc(req); 102402b1a746SChristoph Hellwig } else { 10257a83aa4eSChristoph Hellwig BUG_ON(!cmd->data_length); 102602b1a746SChristoph Hellwig 10275787cacdSChristoph Hellwig ret = pscsi_map_sg(cmd, sgl, sgl_nents, data_direction, &hbio); 1028de103c93SChristoph Hellwig if (ret) 10295787cacdSChristoph Hellwig goto fail; 1030c66ac9dbSNicholas Bellinger 103102b1a746SChristoph Hellwig req = blk_make_request(pdv->pdv_sd->request_queue, hbio, 103202b1a746SChristoph Hellwig GFP_KERNEL); 1033ed327ed3SDan Carpenter if (IS_ERR(req)) { 103402b1a746SChristoph Hellwig pr_err("pSCSI: blk_make_request() failed\n"); 1035de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 10365787cacdSChristoph Hellwig goto fail_free_bio; 103702b1a746SChristoph Hellwig } 103802b1a746SChristoph Hellwig } 103902b1a746SChristoph Hellwig 104002b1a746SChristoph Hellwig req->end_io = pscsi_req_done; 10415787cacdSChristoph Hellwig req->end_io_data = cmd; 104202b1a746SChristoph Hellwig req->cmd_len = scsi_command_size(pt->pscsi_cdb); 104302b1a746SChristoph Hellwig req->cmd = &pt->pscsi_cdb[0]; 104402b1a746SChristoph Hellwig req->sense = &pt->pscsi_sense[0]; 104502b1a746SChristoph Hellwig req->sense_len = 0; 104602b1a746SChristoph Hellwig if (pdv->pdv_sd->type == TYPE_DISK) 104702b1a746SChristoph Hellwig req->timeout = PS_TIMEOUT_DISK; 104802b1a746SChristoph Hellwig else 104902b1a746SChristoph Hellwig req->timeout = PS_TIMEOUT_OTHER; 105002b1a746SChristoph Hellwig req->retries = PS_RETRY; 105102b1a746SChristoph Hellwig 105202b1a746SChristoph Hellwig blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, 105368d81f40SChristoph Hellwig (cmd->sam_task_attr == TCM_HEAD_TAG), 105402b1a746SChristoph Hellwig pscsi_req_done); 105502b1a746SChristoph Hellwig 105603e98c9eSNicholas Bellinger return 0; 105702b1a746SChristoph Hellwig 10585787cacdSChristoph Hellwig fail_free_bio: 105902b1a746SChristoph Hellwig while (hbio) { 106002b1a746SChristoph Hellwig struct bio *bio = hbio; 106102b1a746SChristoph Hellwig hbio = hbio->bi_next; 106202b1a746SChristoph Hellwig bio_endio(bio, 0); /* XXX: should be error */ 106302b1a746SChristoph Hellwig } 1064de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 10655787cacdSChristoph Hellwig fail: 10665787cacdSChristoph Hellwig kfree(pt); 1067de103c93SChristoph Hellwig return ret; 106802b1a746SChristoph Hellwig } 106902b1a746SChristoph Hellwig 1070c66ac9dbSNicholas Bellinger /* pscsi_get_device_type(): 1071c66ac9dbSNicholas Bellinger * 1072c66ac9dbSNicholas Bellinger * 1073c66ac9dbSNicholas Bellinger */ 1074c66ac9dbSNicholas Bellinger static u32 pscsi_get_device_type(struct se_device *dev) 1075c66ac9dbSNicholas Bellinger { 10760fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 1077c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 1078c66ac9dbSNicholas Bellinger 1079215a8fe4SNicholas Bellinger return (sd) ? sd->type : TYPE_NO_LUN; 1080c66ac9dbSNicholas Bellinger } 1081c66ac9dbSNicholas Bellinger 1082c66ac9dbSNicholas Bellinger static sector_t pscsi_get_blocks(struct se_device *dev) 1083c66ac9dbSNicholas Bellinger { 10840fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 1085c66ac9dbSNicholas Bellinger 1086c66ac9dbSNicholas Bellinger if (pdv->pdv_bd && pdv->pdv_bd->bd_part) 1087c66ac9dbSNicholas Bellinger return pdv->pdv_bd->bd_part->nr_sects; 1088c66ac9dbSNicholas Bellinger 1089c66ac9dbSNicholas Bellinger dump_stack(); 1090c66ac9dbSNicholas Bellinger return 0; 1091c66ac9dbSNicholas Bellinger } 1092c66ac9dbSNicholas Bellinger 10935787cacdSChristoph Hellwig static void pscsi_req_done(struct request *req, int uptodate) 1094c66ac9dbSNicholas Bellinger { 10955787cacdSChristoph Hellwig struct se_cmd *cmd = req->end_io_data; 10965787cacdSChristoph Hellwig struct pscsi_plugin_task *pt = cmd->priv; 10975787cacdSChristoph Hellwig 10985787cacdSChristoph Hellwig pt->pscsi_result = req->errors; 10995787cacdSChristoph Hellwig pt->pscsi_resid = req->resid_len; 11005787cacdSChristoph Hellwig 11015787cacdSChristoph Hellwig cmd->scsi_status = status_byte(pt->pscsi_result) << 1; 11025787cacdSChristoph Hellwig if (cmd->scsi_status) { 11035787cacdSChristoph Hellwig pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" 11045787cacdSChristoph Hellwig " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], 1105c66ac9dbSNicholas Bellinger pt->pscsi_result); 1106c66ac9dbSNicholas Bellinger } 1107c66ac9dbSNicholas Bellinger 1108c66ac9dbSNicholas Bellinger switch (host_byte(pt->pscsi_result)) { 1109c66ac9dbSNicholas Bellinger case DID_OK: 11105787cacdSChristoph Hellwig target_complete_cmd(cmd, cmd->scsi_status); 1111c66ac9dbSNicholas Bellinger break; 1112c66ac9dbSNicholas Bellinger default: 11135787cacdSChristoph Hellwig pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" 11145787cacdSChristoph Hellwig " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], 1115c66ac9dbSNicholas Bellinger pt->pscsi_result); 11165787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); 1117c66ac9dbSNicholas Bellinger break; 1118c66ac9dbSNicholas Bellinger } 1119c66ac9dbSNicholas Bellinger 1120c66ac9dbSNicholas Bellinger __blk_put_request(req->q, req); 11215787cacdSChristoph Hellwig kfree(pt); 1122c66ac9dbSNicholas Bellinger } 1123c66ac9dbSNicholas Bellinger 11246cfb546bSNicholas Bellinger DEF_TB_DEV_ATTRIB_RO(pscsi, hw_pi_prot_type); 11256cfb546bSNicholas Bellinger TB_DEV_ATTR_RO(pscsi, hw_pi_prot_type); 11266cfb546bSNicholas Bellinger 11276cfb546bSNicholas Bellinger DEF_TB_DEV_ATTRIB_RO(pscsi, hw_block_size); 11286cfb546bSNicholas Bellinger TB_DEV_ATTR_RO(pscsi, hw_block_size); 11296cfb546bSNicholas Bellinger 11306cfb546bSNicholas Bellinger DEF_TB_DEV_ATTRIB_RO(pscsi, hw_max_sectors); 11316cfb546bSNicholas Bellinger TB_DEV_ATTR_RO(pscsi, hw_max_sectors); 11326cfb546bSNicholas Bellinger 11336cfb546bSNicholas Bellinger DEF_TB_DEV_ATTRIB_RO(pscsi, hw_queue_depth); 11346cfb546bSNicholas Bellinger TB_DEV_ATTR_RO(pscsi, hw_queue_depth); 11356cfb546bSNicholas Bellinger 11366cfb546bSNicholas Bellinger static struct configfs_attribute *pscsi_backend_dev_attrs[] = { 11376cfb546bSNicholas Bellinger &pscsi_dev_attrib_hw_pi_prot_type.attr, 11386cfb546bSNicholas Bellinger &pscsi_dev_attrib_hw_block_size.attr, 11396cfb546bSNicholas Bellinger &pscsi_dev_attrib_hw_max_sectors.attr, 11406cfb546bSNicholas Bellinger &pscsi_dev_attrib_hw_queue_depth.attr, 11416cfb546bSNicholas Bellinger NULL, 11426cfb546bSNicholas Bellinger }; 11436cfb546bSNicholas Bellinger 1144c66ac9dbSNicholas Bellinger static struct se_subsystem_api pscsi_template = { 1145c66ac9dbSNicholas Bellinger .name = "pscsi", 1146c66ac9dbSNicholas Bellinger .owner = THIS_MODULE, 1147a3541703SAndy Grover .transport_flags = TRANSPORT_FLAG_PASSTHROUGH, 1148c66ac9dbSNicholas Bellinger .attach_hba = pscsi_attach_hba, 1149c66ac9dbSNicholas Bellinger .detach_hba = pscsi_detach_hba, 1150c66ac9dbSNicholas Bellinger .pmode_enable_hba = pscsi_pmode_enable_hba, 11510fd97ccfSChristoph Hellwig .alloc_device = pscsi_alloc_device, 11520fd97ccfSChristoph Hellwig .configure_device = pscsi_configure_device, 1153c66ac9dbSNicholas Bellinger .free_device = pscsi_free_device, 1154c66ac9dbSNicholas Bellinger .transport_complete = pscsi_transport_complete, 1155d6e0175cSChristoph Hellwig .parse_cdb = pscsi_parse_cdb, 1156c66ac9dbSNicholas Bellinger .set_configfs_dev_params = pscsi_set_configfs_dev_params, 1157c66ac9dbSNicholas Bellinger .show_configfs_dev_params = pscsi_show_configfs_dev_params, 1158c66ac9dbSNicholas Bellinger .get_device_type = pscsi_get_device_type, 1159c66ac9dbSNicholas Bellinger .get_blocks = pscsi_get_blocks, 1160c66ac9dbSNicholas Bellinger }; 1161c66ac9dbSNicholas Bellinger 1162c66ac9dbSNicholas Bellinger static int __init pscsi_module_init(void) 1163c66ac9dbSNicholas Bellinger { 11646cfb546bSNicholas Bellinger struct target_backend_cits *tbc = &pscsi_template.tb_cits; 11656cfb546bSNicholas Bellinger 11666cfb546bSNicholas Bellinger target_core_setup_sub_cits(&pscsi_template); 11676cfb546bSNicholas Bellinger tbc->tb_dev_attrib_cit.ct_attrs = pscsi_backend_dev_attrs; 11686cfb546bSNicholas Bellinger 1169c66ac9dbSNicholas Bellinger return transport_subsystem_register(&pscsi_template); 1170c66ac9dbSNicholas Bellinger } 1171c66ac9dbSNicholas Bellinger 117263b91d5aSAsias He static void __exit pscsi_module_exit(void) 1173c66ac9dbSNicholas Bellinger { 1174c66ac9dbSNicholas Bellinger transport_subsystem_release(&pscsi_template); 1175c66ac9dbSNicholas Bellinger } 1176c66ac9dbSNicholas Bellinger 1177c66ac9dbSNicholas Bellinger MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); 1178c66ac9dbSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 1179c66ac9dbSNicholas Bellinger MODULE_LICENSE("GPL"); 1180c66ac9dbSNicholas Bellinger 1181c66ac9dbSNicholas Bellinger module_init(pscsi_module_init); 1182c66ac9dbSNicholas Bellinger module_exit(pscsi_module_exit); 1183