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_device.h> 40c66ac9dbSNicholas Bellinger #include <scsi/scsi_host.h> 41e66ecd50SNicholas Bellinger #include <scsi/scsi_tcq.h> 42c66ac9dbSNicholas Bellinger 43c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 44c4795fb2SChristoph Hellwig #include <target/target_core_backend.h> 45c66ac9dbSNicholas Bellinger 46d6e0175cSChristoph Hellwig #include "target_core_alua.h" 4729a05deeSNicholas Bellinger #include "target_core_internal.h" 48c66ac9dbSNicholas Bellinger #include "target_core_pscsi.h" 49c66ac9dbSNicholas Bellinger 50c66ac9dbSNicholas Bellinger #define ISPRINT(a) ((a >= ' ') && (a <= '~')) 51c66ac9dbSNicholas Bellinger 520fd97ccfSChristoph Hellwig static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev) 530fd97ccfSChristoph Hellwig { 540fd97ccfSChristoph Hellwig return container_of(dev, struct pscsi_dev_virt, dev); 550fd97ccfSChristoph Hellwig } 560fd97ccfSChristoph Hellwig 57de103c93SChristoph Hellwig static sense_reason_t pscsi_execute_cmd(struct se_cmd *cmd); 58c66ac9dbSNicholas Bellinger static void pscsi_req_done(struct request *, int); 59c66ac9dbSNicholas Bellinger 60c66ac9dbSNicholas Bellinger /* pscsi_attach_hba(): 61c66ac9dbSNicholas Bellinger * 62c66ac9dbSNicholas Bellinger * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. 63c66ac9dbSNicholas Bellinger * from the passed SCSI Host ID. 64c66ac9dbSNicholas Bellinger */ 65c66ac9dbSNicholas Bellinger static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) 66c66ac9dbSNicholas Bellinger { 67c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv; 68c66ac9dbSNicholas Bellinger 69c66ac9dbSNicholas Bellinger phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); 706708bb27SAndy Grover if (!phv) { 716708bb27SAndy Grover pr_err("Unable to allocate struct pscsi_hba_virt\n"); 72e3d6f909SAndy Grover return -ENOMEM; 73c66ac9dbSNicholas Bellinger } 74c66ac9dbSNicholas Bellinger phv->phv_host_id = host_id; 75e6a8a41aSStefan Hajnoczi phv->phv_mode = PHV_VIRTUAL_HOST_ID; 76c66ac9dbSNicholas Bellinger 775951146dSAndy Grover hba->hba_ptr = phv; 78c66ac9dbSNicholas Bellinger 796708bb27SAndy Grover pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on" 80c66ac9dbSNicholas Bellinger " Generic Target Core Stack %s\n", hba->hba_id, 81ce8dd25dSChristoph Hellwig PSCSI_VERSION, TARGET_CORE_VERSION); 826708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n", 83e3d6f909SAndy Grover hba->hba_id); 84c66ac9dbSNicholas Bellinger 85c66ac9dbSNicholas Bellinger return 0; 86c66ac9dbSNicholas Bellinger } 87c66ac9dbSNicholas Bellinger 88c66ac9dbSNicholas Bellinger static void pscsi_detach_hba(struct se_hba *hba) 89c66ac9dbSNicholas Bellinger { 90c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 91c66ac9dbSNicholas Bellinger struct Scsi_Host *scsi_host = phv->phv_lld_host; 92c66ac9dbSNicholas Bellinger 93c66ac9dbSNicholas Bellinger if (scsi_host) { 94c66ac9dbSNicholas Bellinger scsi_host_put(scsi_host); 95c66ac9dbSNicholas Bellinger 966708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from" 97c66ac9dbSNicholas Bellinger " Generic Target Core\n", hba->hba_id, 98c66ac9dbSNicholas Bellinger (scsi_host->hostt->name) ? (scsi_host->hostt->name) : 99c66ac9dbSNicholas Bellinger "Unknown"); 100c66ac9dbSNicholas Bellinger } else 1016708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA" 102c66ac9dbSNicholas Bellinger " from Generic Target Core\n", hba->hba_id); 103c66ac9dbSNicholas Bellinger 104c66ac9dbSNicholas Bellinger kfree(phv); 105c66ac9dbSNicholas Bellinger hba->hba_ptr = NULL; 106c66ac9dbSNicholas Bellinger } 107c66ac9dbSNicholas Bellinger 108c66ac9dbSNicholas Bellinger static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) 109c66ac9dbSNicholas Bellinger { 1108359cf43SJörn Engel struct pscsi_hba_virt *phv = hba->hba_ptr; 111c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 112c66ac9dbSNicholas Bellinger /* 113c66ac9dbSNicholas Bellinger * Release the struct Scsi_Host 114c66ac9dbSNicholas Bellinger */ 1156708bb27SAndy Grover if (!mode_flag) { 1166708bb27SAndy Grover if (!sh) 117c66ac9dbSNicholas Bellinger return 0; 118c66ac9dbSNicholas Bellinger 119c66ac9dbSNicholas Bellinger phv->phv_lld_host = NULL; 120e6a8a41aSStefan Hajnoczi phv->phv_mode = PHV_VIRTUAL_HOST_ID; 121c66ac9dbSNicholas Bellinger 1226708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" 123c66ac9dbSNicholas Bellinger " %s\n", hba->hba_id, (sh->hostt->name) ? 124c66ac9dbSNicholas Bellinger (sh->hostt->name) : "Unknown"); 125c66ac9dbSNicholas Bellinger 126c66ac9dbSNicholas Bellinger scsi_host_put(sh); 127c66ac9dbSNicholas Bellinger return 0; 128c66ac9dbSNicholas Bellinger } 129c66ac9dbSNicholas Bellinger /* 130c66ac9dbSNicholas Bellinger * Otherwise, locate struct Scsi_Host from the original passed 131c66ac9dbSNicholas Bellinger * pSCSI Host ID and enable for phba mode 132c66ac9dbSNicholas Bellinger */ 133e3d6f909SAndy Grover sh = scsi_host_lookup(phv->phv_host_id); 13458932e96SWei Yongjun if (!sh) { 1356708bb27SAndy Grover pr_err("pSCSI: Unable to locate SCSI Host for" 136c66ac9dbSNicholas Bellinger " phv_host_id: %d\n", phv->phv_host_id); 13758932e96SWei Yongjun return -EINVAL; 138c66ac9dbSNicholas Bellinger } 139c66ac9dbSNicholas Bellinger 140c66ac9dbSNicholas Bellinger phv->phv_lld_host = sh; 141c66ac9dbSNicholas Bellinger phv->phv_mode = PHV_LLD_SCSI_HOST_NO; 142c66ac9dbSNicholas Bellinger 1436708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", 144c66ac9dbSNicholas Bellinger hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); 145c66ac9dbSNicholas Bellinger 146c66ac9dbSNicholas Bellinger return 1; 147c66ac9dbSNicholas Bellinger } 148c66ac9dbSNicholas Bellinger 149c66ac9dbSNicholas Bellinger static void pscsi_tape_read_blocksize(struct se_device *dev, 150c66ac9dbSNicholas Bellinger struct scsi_device *sdev) 151c66ac9dbSNicholas Bellinger { 152c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 153c66ac9dbSNicholas Bellinger int ret; 154c66ac9dbSNicholas Bellinger 155c66ac9dbSNicholas Bellinger buf = kzalloc(12, GFP_KERNEL); 156c66ac9dbSNicholas Bellinger if (!buf) 157a04e54f2SNicholas Bellinger goto out_free; 158c66ac9dbSNicholas Bellinger 159c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 160c66ac9dbSNicholas Bellinger cdb[0] = MODE_SENSE; 161c66ac9dbSNicholas Bellinger cdb[4] = 0x0c; /* 12 bytes */ 162c66ac9dbSNicholas Bellinger 163c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, 164c66ac9dbSNicholas Bellinger HZ, 1, NULL); 165c66ac9dbSNicholas Bellinger if (ret) 166c66ac9dbSNicholas Bellinger goto out_free; 167c66ac9dbSNicholas Bellinger 168c66ac9dbSNicholas Bellinger /* 169c66ac9dbSNicholas Bellinger * If MODE_SENSE still returns zero, set the default value to 1024. 170c66ac9dbSNicholas Bellinger */ 171c66ac9dbSNicholas Bellinger sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); 172a04e54f2SNicholas Bellinger out_free: 173c66ac9dbSNicholas Bellinger if (!sdev->sector_size) 174c66ac9dbSNicholas Bellinger sdev->sector_size = 1024; 175a04e54f2SNicholas Bellinger 176c66ac9dbSNicholas Bellinger kfree(buf); 177c66ac9dbSNicholas Bellinger } 178c66ac9dbSNicholas Bellinger 179c66ac9dbSNicholas Bellinger static void 180c66ac9dbSNicholas Bellinger pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) 181c66ac9dbSNicholas Bellinger { 182c66ac9dbSNicholas Bellinger unsigned char *buf; 183c66ac9dbSNicholas Bellinger 184c66ac9dbSNicholas Bellinger if (sdev->inquiry_len < INQUIRY_LEN) 185c66ac9dbSNicholas Bellinger return; 186c66ac9dbSNicholas Bellinger 187c66ac9dbSNicholas Bellinger buf = sdev->inquiry; 188c66ac9dbSNicholas Bellinger if (!buf) 189c66ac9dbSNicholas Bellinger return; 190c66ac9dbSNicholas Bellinger /* 191c66ac9dbSNicholas Bellinger * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() 192c66ac9dbSNicholas Bellinger */ 193c66ac9dbSNicholas Bellinger memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); 194c66ac9dbSNicholas Bellinger memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); 195c66ac9dbSNicholas Bellinger memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); 196c66ac9dbSNicholas Bellinger } 197c66ac9dbSNicholas Bellinger 198c66ac9dbSNicholas Bellinger static int 199c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) 200c66ac9dbSNicholas Bellinger { 201c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 202c66ac9dbSNicholas Bellinger int ret; 203c66ac9dbSNicholas Bellinger 204c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 205c66ac9dbSNicholas Bellinger if (!buf) 206e3d6f909SAndy Grover return -ENOMEM; 207c66ac9dbSNicholas Bellinger 208c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 209c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 210c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 211c66ac9dbSNicholas Bellinger cdb[2] = 0x80; /* Unit Serial Number */ 212c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; 213c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); 214c66ac9dbSNicholas Bellinger 215c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 216c66ac9dbSNicholas Bellinger INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); 217c66ac9dbSNicholas Bellinger if (ret) 218c66ac9dbSNicholas Bellinger goto out_free; 219c66ac9dbSNicholas Bellinger 220c66ac9dbSNicholas Bellinger snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); 221c66ac9dbSNicholas Bellinger 2220fd97ccfSChristoph Hellwig wwn->t10_dev->dev_flags |= DF_FIRMWARE_VPD_UNIT_SERIAL; 223c66ac9dbSNicholas Bellinger 224c66ac9dbSNicholas Bellinger kfree(buf); 225c66ac9dbSNicholas Bellinger return 0; 226c66ac9dbSNicholas Bellinger 227c66ac9dbSNicholas Bellinger out_free: 228c66ac9dbSNicholas Bellinger kfree(buf); 229e3d6f909SAndy Grover return -EPERM; 230c66ac9dbSNicholas Bellinger } 231c66ac9dbSNicholas Bellinger 232c66ac9dbSNicholas Bellinger static void 233c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, 234c66ac9dbSNicholas Bellinger struct t10_wwn *wwn) 235c66ac9dbSNicholas Bellinger { 236c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; 237c66ac9dbSNicholas Bellinger int ident_len, page_len, off = 4, ret; 238c66ac9dbSNicholas Bellinger struct t10_vpd *vpd; 239c66ac9dbSNicholas Bellinger 240c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 241c66ac9dbSNicholas Bellinger if (!buf) 242c66ac9dbSNicholas Bellinger return; 243c66ac9dbSNicholas Bellinger 244c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 245c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 246c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 247c66ac9dbSNicholas Bellinger cdb[2] = 0x83; /* Device Identifier */ 248c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; 249c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); 250c66ac9dbSNicholas Bellinger 251c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 252c66ac9dbSNicholas Bellinger INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, 253c66ac9dbSNicholas Bellinger NULL, HZ, 1, NULL); 254c66ac9dbSNicholas Bellinger if (ret) 255c66ac9dbSNicholas Bellinger goto out; 256c66ac9dbSNicholas Bellinger 257c66ac9dbSNicholas Bellinger page_len = (buf[2] << 8) | buf[3]; 258c66ac9dbSNicholas Bellinger while (page_len > 0) { 259c66ac9dbSNicholas Bellinger /* Grab a pointer to the Identification descriptor */ 260c66ac9dbSNicholas Bellinger page_83 = &buf[off]; 261c66ac9dbSNicholas Bellinger ident_len = page_83[3]; 262c66ac9dbSNicholas Bellinger if (!ident_len) { 2636708bb27SAndy Grover pr_err("page_83[3]: identifier" 264c66ac9dbSNicholas Bellinger " length zero!\n"); 265c66ac9dbSNicholas Bellinger break; 266c66ac9dbSNicholas Bellinger } 26735d1efe8SMasanari Iida pr_debug("T10 VPD Identifier Length: %d\n", ident_len); 268c66ac9dbSNicholas Bellinger 269c66ac9dbSNicholas Bellinger vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); 270c66ac9dbSNicholas Bellinger if (!vpd) { 2716708bb27SAndy Grover pr_err("Unable to allocate memory for" 272c66ac9dbSNicholas Bellinger " struct t10_vpd\n"); 273c66ac9dbSNicholas Bellinger goto out; 274c66ac9dbSNicholas Bellinger } 275c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&vpd->vpd_list); 276c66ac9dbSNicholas Bellinger 277c66ac9dbSNicholas Bellinger transport_set_vpd_proto_id(vpd, page_83); 278c66ac9dbSNicholas Bellinger transport_set_vpd_assoc(vpd, page_83); 279c66ac9dbSNicholas Bellinger 280c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident_type(vpd, page_83) < 0) { 281c66ac9dbSNicholas Bellinger off += (ident_len + 4); 282c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 283c66ac9dbSNicholas Bellinger kfree(vpd); 284c66ac9dbSNicholas Bellinger continue; 285c66ac9dbSNicholas Bellinger } 286c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident(vpd, page_83) < 0) { 287c66ac9dbSNicholas Bellinger off += (ident_len + 4); 288c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 289c66ac9dbSNicholas Bellinger kfree(vpd); 290c66ac9dbSNicholas Bellinger continue; 291c66ac9dbSNicholas Bellinger } 292c66ac9dbSNicholas Bellinger 293c66ac9dbSNicholas Bellinger list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); 294c66ac9dbSNicholas Bellinger off += (ident_len + 4); 295c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 296c66ac9dbSNicholas Bellinger } 297c66ac9dbSNicholas Bellinger 298c66ac9dbSNicholas Bellinger out: 299c66ac9dbSNicholas Bellinger kfree(buf); 300c66ac9dbSNicholas Bellinger } 301c66ac9dbSNicholas Bellinger 3020fd97ccfSChristoph Hellwig static int pscsi_add_device_to_list(struct se_device *dev, 3030fd97ccfSChristoph Hellwig struct scsi_device *sd) 304c66ac9dbSNicholas Bellinger { 3050fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 3060fd97ccfSChristoph Hellwig struct request_queue *q = sd->request_queue; 307c66ac9dbSNicholas Bellinger 3080fd97ccfSChristoph Hellwig pdv->pdv_sd = sd; 309c66ac9dbSNicholas Bellinger 310c66ac9dbSNicholas Bellinger if (!sd->queue_depth) { 311c66ac9dbSNicholas Bellinger sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; 312c66ac9dbSNicholas Bellinger 3139cb78c16SHannes Reinecke pr_err("Set broken SCSI Device %d:%d:%llu" 314c66ac9dbSNicholas Bellinger " queue_depth to %d\n", sd->channel, sd->id, 315c66ac9dbSNicholas Bellinger sd->lun, sd->queue_depth); 316c66ac9dbSNicholas Bellinger } 3170fd97ccfSChristoph Hellwig 318a04e54f2SNicholas Bellinger dev->dev_attrib.hw_block_size = 319a04e54f2SNicholas Bellinger min_not_zero((int)sd->sector_size, 512); 3200fd97ccfSChristoph Hellwig dev->dev_attrib.hw_max_sectors = 321a04e54f2SNicholas Bellinger min_not_zero(sd->host->max_sectors, queue_max_hw_sectors(q)); 3220fd97ccfSChristoph Hellwig dev->dev_attrib.hw_queue_depth = sd->queue_depth; 3230fd97ccfSChristoph Hellwig 324c66ac9dbSNicholas Bellinger /* 325c66ac9dbSNicholas Bellinger * Setup our standard INQUIRY info into se_dev->t10_wwn 326c66ac9dbSNicholas Bellinger */ 3270fd97ccfSChristoph Hellwig pscsi_set_inquiry_info(sd, &dev->t10_wwn); 328c66ac9dbSNicholas Bellinger 329c66ac9dbSNicholas Bellinger /* 330c66ac9dbSNicholas Bellinger * Locate VPD WWN Information used for various purposes within 331c66ac9dbSNicholas Bellinger * the Storage Engine. 332c66ac9dbSNicholas Bellinger */ 3330fd97ccfSChristoph Hellwig if (!pscsi_get_inquiry_vpd_serial(sd, &dev->t10_wwn)) { 334c66ac9dbSNicholas Bellinger /* 335c66ac9dbSNicholas Bellinger * If VPD Unit Serial returned GOOD status, try 336c66ac9dbSNicholas Bellinger * VPD Device Identification page (0x83). 337c66ac9dbSNicholas Bellinger */ 3380fd97ccfSChristoph Hellwig pscsi_get_inquiry_vpd_device_ident(sd, &dev->t10_wwn); 339c66ac9dbSNicholas Bellinger } 340c66ac9dbSNicholas Bellinger 341c66ac9dbSNicholas Bellinger /* 342c66ac9dbSNicholas Bellinger * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. 343c66ac9dbSNicholas Bellinger */ 344a04e54f2SNicholas Bellinger if (sd->type == TYPE_TAPE) { 345c66ac9dbSNicholas Bellinger pscsi_tape_read_blocksize(dev, sd); 346a04e54f2SNicholas Bellinger dev->dev_attrib.hw_block_size = sd->sector_size; 347a04e54f2SNicholas Bellinger } 3480fd97ccfSChristoph Hellwig return 0; 349c66ac9dbSNicholas Bellinger } 350c66ac9dbSNicholas Bellinger 3510fd97ccfSChristoph Hellwig static struct se_device *pscsi_alloc_device(struct se_hba *hba, 3520fd97ccfSChristoph Hellwig const char *name) 353c66ac9dbSNicholas Bellinger { 354c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv; 355c66ac9dbSNicholas Bellinger 356c66ac9dbSNicholas Bellinger pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); 3576708bb27SAndy Grover if (!pdv) { 3586708bb27SAndy Grover pr_err("Unable to allocate memory for struct pscsi_dev_virt\n"); 359c66ac9dbSNicholas Bellinger return NULL; 360c66ac9dbSNicholas Bellinger } 361c66ac9dbSNicholas Bellinger 3626708bb27SAndy Grover pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name); 3630fd97ccfSChristoph Hellwig return &pdv->dev; 364c66ac9dbSNicholas Bellinger } 365c66ac9dbSNicholas Bellinger 366c66ac9dbSNicholas Bellinger /* 367c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 368c66ac9dbSNicholas Bellinger */ 3690fd97ccfSChristoph Hellwig static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd) 3705dd7ed2eSDan Carpenter __releases(sh->host_lock) 371c66ac9dbSNicholas Bellinger { 3720fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 3730fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 374c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 375c66ac9dbSNicholas Bellinger struct block_device *bd; 3760fd97ccfSChristoph Hellwig int ret; 377c66ac9dbSNicholas Bellinger 378c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 3799cb78c16SHannes Reinecke pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n", 380c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 381c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 3820fd97ccfSChristoph Hellwig return -EIO; 383c66ac9dbSNicholas Bellinger } 384c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 385c66ac9dbSNicholas Bellinger /* 386c66ac9dbSNicholas Bellinger * Claim exclusive struct block_device access to struct scsi_device 387c66ac9dbSNicholas Bellinger * for TYPE_DISK using supplied udev_path 388c66ac9dbSNicholas Bellinger */ 3890fd97ccfSChristoph Hellwig bd = blkdev_get_by_path(dev->udev_path, 390c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); 3913ae279d2SDan Carpenter if (IS_ERR(bd)) { 3926708bb27SAndy Grover pr_err("pSCSI: blkdev_get_by_path() failed\n"); 393c66ac9dbSNicholas Bellinger scsi_device_put(sd); 3940fd97ccfSChristoph Hellwig return PTR_ERR(bd); 395c66ac9dbSNicholas Bellinger } 396c66ac9dbSNicholas Bellinger pdv->pdv_bd = bd; 397c66ac9dbSNicholas Bellinger 3980fd97ccfSChristoph Hellwig ret = pscsi_add_device_to_list(dev, sd); 3990fd97ccfSChristoph Hellwig if (ret) { 400c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); 401c66ac9dbSNicholas Bellinger scsi_device_put(sd); 4020fd97ccfSChristoph Hellwig return ret; 403c66ac9dbSNicholas Bellinger } 4040fd97ccfSChristoph Hellwig 4059cb78c16SHannes Reinecke pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%llu\n", 406c66ac9dbSNicholas Bellinger phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); 4070fd97ccfSChristoph Hellwig return 0; 408c66ac9dbSNicholas Bellinger } 409c66ac9dbSNicholas Bellinger 410c66ac9dbSNicholas Bellinger /* 411c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 412c66ac9dbSNicholas Bellinger */ 413a04e54f2SNicholas Bellinger static int pscsi_create_type_nondisk(struct se_device *dev, struct scsi_device *sd) 4145dd7ed2eSDan Carpenter __releases(sh->host_lock) 415c66ac9dbSNicholas Bellinger { 4160fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 417c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 4180fd97ccfSChristoph Hellwig int ret; 419c66ac9dbSNicholas Bellinger 420c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 4219cb78c16SHannes Reinecke pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n", 422c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 423c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 4240fd97ccfSChristoph Hellwig return -EIO; 425c66ac9dbSNicholas Bellinger } 426c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 427c66ac9dbSNicholas Bellinger 4280fd97ccfSChristoph Hellwig ret = pscsi_add_device_to_list(dev, sd); 4290fd97ccfSChristoph Hellwig if (ret) { 430c66ac9dbSNicholas Bellinger scsi_device_put(sd); 4310fd97ccfSChristoph Hellwig return ret; 432c66ac9dbSNicholas Bellinger } 4339cb78c16SHannes Reinecke pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n", 434c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 435c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 436c66ac9dbSNicholas Bellinger 4370fd97ccfSChristoph Hellwig return 0; 438c66ac9dbSNicholas Bellinger } 439c66ac9dbSNicholas Bellinger 440ecf0dd66SFengguang Wu static int pscsi_configure_device(struct se_device *dev) 441c66ac9dbSNicholas Bellinger { 4420fd97ccfSChristoph Hellwig struct se_hba *hba = dev->se_hba; 4430fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 444c66ac9dbSNicholas Bellinger struct scsi_device *sd; 4450fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 446c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 447c66ac9dbSNicholas Bellinger int legacy_mode_enable = 0; 4480fd97ccfSChristoph Hellwig int ret; 449c66ac9dbSNicholas Bellinger 4500fd97ccfSChristoph Hellwig if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || 4510fd97ccfSChristoph Hellwig !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || 4520fd97ccfSChristoph Hellwig !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { 4530fd97ccfSChristoph Hellwig pr_err("Missing scsi_channel_id=, scsi_target_id= and" 4540fd97ccfSChristoph Hellwig " scsi_lun_id= parameters\n"); 4550fd97ccfSChristoph Hellwig return -EINVAL; 456c66ac9dbSNicholas Bellinger } 4570fd97ccfSChristoph Hellwig 458c66ac9dbSNicholas Bellinger /* 459c66ac9dbSNicholas Bellinger * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the 460c66ac9dbSNicholas Bellinger * struct Scsi_Host we will need to bring the TCM/pSCSI object online 461c66ac9dbSNicholas Bellinger */ 4626708bb27SAndy Grover if (!sh) { 463c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 4646708bb27SAndy Grover pr_err("pSCSI: Unable to locate struct" 465c66ac9dbSNicholas Bellinger " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); 4660fd97ccfSChristoph Hellwig return -ENODEV; 467c66ac9dbSNicholas Bellinger } 468c66ac9dbSNicholas Bellinger /* 469e6a8a41aSStefan Hajnoczi * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device 470c66ac9dbSNicholas Bellinger * reference, we enforce that udev_path has been set 471c66ac9dbSNicholas Bellinger */ 4720fd97ccfSChristoph Hellwig if (!(dev->dev_flags & DF_USING_UDEV_PATH)) { 4736708bb27SAndy Grover pr_err("pSCSI: udev_path attribute has not" 474c66ac9dbSNicholas Bellinger " been set before ENABLE=1\n"); 4750fd97ccfSChristoph Hellwig return -EINVAL; 476c66ac9dbSNicholas Bellinger } 477c66ac9dbSNicholas Bellinger /* 478e6a8a41aSStefan Hajnoczi * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID, 479c66ac9dbSNicholas Bellinger * use the original TCM hba ID to reference Linux/SCSI Host No 480c66ac9dbSNicholas Bellinger * and enable for PHV_LLD_SCSI_HOST_NO mode. 481c66ac9dbSNicholas Bellinger */ 482c66ac9dbSNicholas Bellinger if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { 4830fd97ccfSChristoph Hellwig if (hba->dev_count) { 4846708bb27SAndy Grover pr_err("pSCSI: Unable to set hba_mode" 485c66ac9dbSNicholas Bellinger " with active devices\n"); 4860fd97ccfSChristoph Hellwig return -EEXIST; 487c66ac9dbSNicholas Bellinger } 488c66ac9dbSNicholas Bellinger 489c66ac9dbSNicholas Bellinger if (pscsi_pmode_enable_hba(hba, 1) != 1) 4900fd97ccfSChristoph Hellwig return -ENODEV; 491c66ac9dbSNicholas Bellinger 492c66ac9dbSNicholas Bellinger legacy_mode_enable = 1; 493c66ac9dbSNicholas Bellinger hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 494c66ac9dbSNicholas Bellinger sh = phv->phv_lld_host; 495c66ac9dbSNicholas Bellinger } else { 496e3d6f909SAndy Grover sh = scsi_host_lookup(pdv->pdv_host_id); 49758932e96SWei Yongjun if (!sh) { 4986708bb27SAndy Grover pr_err("pSCSI: Unable to locate" 499c66ac9dbSNicholas Bellinger " pdv_host_id: %d\n", pdv->pdv_host_id); 50058932e96SWei Yongjun return -EINVAL; 501c66ac9dbSNicholas Bellinger } 5025a7125c6SAndy Grover pdv->pdv_lld_host = sh; 503c66ac9dbSNicholas Bellinger } 504c66ac9dbSNicholas Bellinger } else { 505e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) { 506e6a8a41aSStefan Hajnoczi pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while" 507c66ac9dbSNicholas Bellinger " struct Scsi_Host exists\n"); 5080fd97ccfSChristoph Hellwig return -EEXIST; 509c66ac9dbSNicholas Bellinger } 510c66ac9dbSNicholas Bellinger } 511c66ac9dbSNicholas Bellinger 512c66ac9dbSNicholas Bellinger spin_lock_irq(sh->host_lock); 513c66ac9dbSNicholas Bellinger list_for_each_entry(sd, &sh->__devices, siblings) { 514c66ac9dbSNicholas Bellinger if ((pdv->pdv_channel_id != sd->channel) || 515c66ac9dbSNicholas Bellinger (pdv->pdv_target_id != sd->id) || 516c66ac9dbSNicholas Bellinger (pdv->pdv_lun_id != sd->lun)) 517c66ac9dbSNicholas Bellinger continue; 518c66ac9dbSNicholas Bellinger /* 519c66ac9dbSNicholas Bellinger * Functions will release the held struct scsi_host->host_lock 520c66ac9dbSNicholas Bellinger * before calling calling pscsi_add_device_to_list() to register 521c66ac9dbSNicholas Bellinger * struct scsi_device with target_core_mod. 522c66ac9dbSNicholas Bellinger */ 523c66ac9dbSNicholas Bellinger switch (sd->type) { 524c66ac9dbSNicholas Bellinger case TYPE_DISK: 5250fd97ccfSChristoph Hellwig ret = pscsi_create_type_disk(dev, sd); 526c66ac9dbSNicholas Bellinger break; 527c66ac9dbSNicholas Bellinger default: 528a04e54f2SNicholas Bellinger ret = pscsi_create_type_nondisk(dev, sd); 529c66ac9dbSNicholas Bellinger break; 530c66ac9dbSNicholas Bellinger } 531c66ac9dbSNicholas Bellinger 5320fd97ccfSChristoph Hellwig if (ret) { 533e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 534c66ac9dbSNicholas Bellinger scsi_host_put(sh); 535c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 536c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 537c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 538c66ac9dbSNicholas Bellinger } 539c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 5400fd97ccfSChristoph Hellwig return ret; 541c66ac9dbSNicholas Bellinger } 5420fd97ccfSChristoph Hellwig return 0; 543c66ac9dbSNicholas Bellinger } 544c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 545c66ac9dbSNicholas Bellinger 5466708bb27SAndy Grover pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, 547c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); 548c66ac9dbSNicholas Bellinger 549e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 550c66ac9dbSNicholas Bellinger scsi_host_put(sh); 551c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 552c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 553c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 554c66ac9dbSNicholas Bellinger } 555c66ac9dbSNicholas Bellinger 5560fd97ccfSChristoph Hellwig return -ENODEV; 557c66ac9dbSNicholas Bellinger } 558c66ac9dbSNicholas Bellinger 5594cc987eaSNicholas Bellinger static void pscsi_dev_call_rcu(struct rcu_head *p) 5604cc987eaSNicholas Bellinger { 5614cc987eaSNicholas Bellinger struct se_device *dev = container_of(p, struct se_device, rcu_head); 5624cc987eaSNicholas Bellinger struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 5634cc987eaSNicholas Bellinger 5644cc987eaSNicholas Bellinger kfree(pdv); 5654cc987eaSNicholas Bellinger } 5664cc987eaSNicholas Bellinger 5670fd97ccfSChristoph Hellwig static void pscsi_free_device(struct se_device *dev) 568c66ac9dbSNicholas Bellinger { 5690fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 5700fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 571c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 572c66ac9dbSNicholas Bellinger 573c66ac9dbSNicholas Bellinger if (sd) { 574c66ac9dbSNicholas Bellinger /* 575c66ac9dbSNicholas Bellinger * Release exclusive pSCSI internal struct block_device claim for 576c66ac9dbSNicholas Bellinger * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() 577c66ac9dbSNicholas Bellinger */ 578c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { 579c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, 580c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL); 581c66ac9dbSNicholas Bellinger pdv->pdv_bd = NULL; 582c66ac9dbSNicholas Bellinger } 583c66ac9dbSNicholas Bellinger /* 584c66ac9dbSNicholas Bellinger * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference 585c66ac9dbSNicholas Bellinger * to struct Scsi_Host now. 586c66ac9dbSNicholas Bellinger */ 587c66ac9dbSNicholas Bellinger if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && 588c66ac9dbSNicholas Bellinger (phv->phv_lld_host != NULL)) 589c66ac9dbSNicholas Bellinger scsi_host_put(phv->phv_lld_host); 5905a7125c6SAndy Grover else if (pdv->pdv_lld_host) 5915a7125c6SAndy Grover scsi_host_put(pdv->pdv_lld_host); 592c66ac9dbSNicholas Bellinger 593c66ac9dbSNicholas Bellinger scsi_device_put(sd); 594c66ac9dbSNicholas Bellinger 595c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 596c66ac9dbSNicholas Bellinger } 5974cc987eaSNicholas Bellinger call_rcu(&dev->rcu_head, pscsi_dev_call_rcu); 598c66ac9dbSNicholas Bellinger } 599c66ac9dbSNicholas Bellinger 600d5829eacSPaolo Bonzini static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg, 601d5829eacSPaolo Bonzini unsigned char *sense_buffer) 602c66ac9dbSNicholas Bellinger { 6030fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); 604c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 605c66ac9dbSNicholas Bellinger int result; 6065787cacdSChristoph Hellwig struct pscsi_plugin_task *pt = cmd->priv; 6071d2a2cd9SNicholas Bellinger unsigned char *cdb; 6081d2a2cd9SNicholas Bellinger /* 6091d2a2cd9SNicholas Bellinger * Special case for REPORT_LUNs handling where pscsi_plugin_task has 6101d2a2cd9SNicholas Bellinger * not been allocated because TCM is handling the emulation directly. 6111d2a2cd9SNicholas Bellinger */ 6121d2a2cd9SNicholas Bellinger if (!pt) 613d5829eacSPaolo Bonzini return; 614c66ac9dbSNicholas Bellinger 6151d2a2cd9SNicholas Bellinger cdb = &pt->pscsi_cdb[0]; 616c66ac9dbSNicholas Bellinger result = pt->pscsi_result; 617c66ac9dbSNicholas Bellinger /* 618c66ac9dbSNicholas Bellinger * Hack to make sure that Write-Protect modepage is set if R/O mode is 619c66ac9dbSNicholas Bellinger * forced. 620c66ac9dbSNicholas Bellinger */ 62129a05deeSNicholas Bellinger if (!cmd->data_length) 622c66ac9dbSNicholas Bellinger goto after_mode_sense; 623c66ac9dbSNicholas Bellinger 624306c11b2SPaolo Bonzini if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && 625306c11b2SPaolo Bonzini (status_byte(result) << 1) == SAM_STAT_GOOD) { 62629a05deeSNicholas Bellinger bool read_only = target_lun_is_rdonly(cmd); 62729a05deeSNicholas Bellinger 62829a05deeSNicholas Bellinger if (read_only) { 629de103c93SChristoph Hellwig unsigned char *buf; 630de103c93SChristoph Hellwig 631de103c93SChristoph Hellwig buf = transport_kmap_data_sg(cmd); 632de103c93SChristoph Hellwig if (!buf) 633de103c93SChristoph Hellwig ; /* XXX: TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE */ 634c66ac9dbSNicholas Bellinger 635c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SENSE_10) { 636c66ac9dbSNicholas Bellinger if (!(buf[3] & 0x80)) 637c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 638c66ac9dbSNicholas Bellinger } else { 639c66ac9dbSNicholas Bellinger if (!(buf[2] & 0x80)) 640c66ac9dbSNicholas Bellinger buf[2] |= 0x80; 641c66ac9dbSNicholas Bellinger } 64205d1c7c0SAndy Grover 6435787cacdSChristoph Hellwig transport_kunmap_data_sg(cmd); 644c66ac9dbSNicholas Bellinger } 645c66ac9dbSNicholas Bellinger } 646c66ac9dbSNicholas Bellinger after_mode_sense: 647c66ac9dbSNicholas Bellinger 648306c11b2SPaolo Bonzini if (sd->type != TYPE_TAPE || !cmd->data_length) 649c66ac9dbSNicholas Bellinger goto after_mode_select; 650c66ac9dbSNicholas Bellinger 651c66ac9dbSNicholas Bellinger /* 652c66ac9dbSNicholas Bellinger * Hack to correctly obtain the initiator requested blocksize for 653c66ac9dbSNicholas Bellinger * TYPE_TAPE. Since this value is dependent upon each tape media, 654c66ac9dbSNicholas Bellinger * struct scsi_device->sector_size will not contain the correct value 655c66ac9dbSNicholas Bellinger * by default, so we go ahead and set it so 656c66ac9dbSNicholas Bellinger * TRANSPORT(dev)->get_blockdev() returns the correct value to the 657c66ac9dbSNicholas Bellinger * storage engine. 658c66ac9dbSNicholas Bellinger */ 659c66ac9dbSNicholas Bellinger if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && 660c66ac9dbSNicholas Bellinger (status_byte(result) << 1) == SAM_STAT_GOOD) { 661c66ac9dbSNicholas Bellinger unsigned char *buf; 662c66ac9dbSNicholas Bellinger u16 bdl; 663c66ac9dbSNicholas Bellinger u32 blocksize; 664c66ac9dbSNicholas Bellinger 665c66ac9dbSNicholas Bellinger buf = sg_virt(&sg[0]); 6666708bb27SAndy Grover if (!buf) { 6676708bb27SAndy Grover pr_err("Unable to get buf for scatterlist\n"); 668c66ac9dbSNicholas Bellinger goto after_mode_select; 669c66ac9dbSNicholas Bellinger } 670c66ac9dbSNicholas Bellinger 671c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 672c66ac9dbSNicholas Bellinger bdl = (buf[3]); 673c66ac9dbSNicholas Bellinger else 674c66ac9dbSNicholas Bellinger bdl = (buf[6] << 8) | (buf[7]); 675c66ac9dbSNicholas Bellinger 676c66ac9dbSNicholas Bellinger if (!bdl) 677c66ac9dbSNicholas Bellinger goto after_mode_select; 678c66ac9dbSNicholas Bellinger 679c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 680c66ac9dbSNicholas Bellinger blocksize = (buf[9] << 16) | (buf[10] << 8) | 681c66ac9dbSNicholas Bellinger (buf[11]); 682c66ac9dbSNicholas Bellinger else 683c66ac9dbSNicholas Bellinger blocksize = (buf[13] << 16) | (buf[14] << 8) | 684c66ac9dbSNicholas Bellinger (buf[15]); 685c66ac9dbSNicholas Bellinger 686c66ac9dbSNicholas Bellinger sd->sector_size = blocksize; 687c66ac9dbSNicholas Bellinger } 688c66ac9dbSNicholas Bellinger after_mode_select: 689c66ac9dbSNicholas Bellinger 690d5829eacSPaolo Bonzini if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) { 691d5829eacSPaolo Bonzini memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER); 692d5829eacSPaolo Bonzini cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; 693d5829eacSPaolo Bonzini } 694c66ac9dbSNicholas Bellinger } 695c66ac9dbSNicholas Bellinger 696c66ac9dbSNicholas Bellinger enum { 697c66ac9dbSNicholas Bellinger Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, 698c66ac9dbSNicholas Bellinger Opt_scsi_lun_id, Opt_err 699c66ac9dbSNicholas Bellinger }; 700c66ac9dbSNicholas Bellinger 701c66ac9dbSNicholas Bellinger static match_table_t tokens = { 702c66ac9dbSNicholas Bellinger {Opt_scsi_host_id, "scsi_host_id=%d"}, 703c66ac9dbSNicholas Bellinger {Opt_scsi_channel_id, "scsi_channel_id=%d"}, 704c66ac9dbSNicholas Bellinger {Opt_scsi_target_id, "scsi_target_id=%d"}, 705c66ac9dbSNicholas Bellinger {Opt_scsi_lun_id, "scsi_lun_id=%d"}, 706c66ac9dbSNicholas Bellinger {Opt_err, NULL} 707c66ac9dbSNicholas Bellinger }; 708c66ac9dbSNicholas Bellinger 7090fd97ccfSChristoph Hellwig static ssize_t pscsi_set_configfs_dev_params(struct se_device *dev, 7100fd97ccfSChristoph Hellwig const char *page, ssize_t count) 711c66ac9dbSNicholas Bellinger { 7120fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 7130fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 714c66ac9dbSNicholas Bellinger char *orig, *ptr, *opts; 715c66ac9dbSNicholas Bellinger substring_t args[MAX_OPT_ARGS]; 716c66ac9dbSNicholas Bellinger int ret = 0, arg, token; 717c66ac9dbSNicholas Bellinger 718c66ac9dbSNicholas Bellinger opts = kstrdup(page, GFP_KERNEL); 719c66ac9dbSNicholas Bellinger if (!opts) 720c66ac9dbSNicholas Bellinger return -ENOMEM; 721c66ac9dbSNicholas Bellinger 722c66ac9dbSNicholas Bellinger orig = opts; 723c66ac9dbSNicholas Bellinger 72490c161b6SSebastian Andrzej Siewior while ((ptr = strsep(&opts, ",\n")) != NULL) { 725c66ac9dbSNicholas Bellinger if (!*ptr) 726c66ac9dbSNicholas Bellinger continue; 727c66ac9dbSNicholas Bellinger 728c66ac9dbSNicholas Bellinger token = match_token(ptr, tokens, args); 729c66ac9dbSNicholas Bellinger switch (token) { 730c66ac9dbSNicholas Bellinger case Opt_scsi_host_id: 731c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 7326708bb27SAndy Grover pr_err("PSCSI[%d]: Unable to accept" 733c66ac9dbSNicholas Bellinger " scsi_host_id while phv_mode ==" 734c66ac9dbSNicholas Bellinger " PHV_LLD_SCSI_HOST_NO\n", 735c66ac9dbSNicholas Bellinger phv->phv_host_id); 736c66ac9dbSNicholas Bellinger ret = -EINVAL; 737c66ac9dbSNicholas Bellinger goto out; 738c66ac9dbSNicholas Bellinger } 739ce31c1b0SJoern Engel ret = match_int(args, &arg); 740ce31c1b0SJoern Engel if (ret) 741ce31c1b0SJoern Engel goto out; 742c66ac9dbSNicholas Bellinger pdv->pdv_host_id = arg; 7436708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Host ID:" 744c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_host_id); 745c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; 746c66ac9dbSNicholas Bellinger break; 747c66ac9dbSNicholas Bellinger case Opt_scsi_channel_id: 748ce31c1b0SJoern Engel ret = match_int(args, &arg); 749ce31c1b0SJoern Engel if (ret) 750ce31c1b0SJoern Engel goto out; 751c66ac9dbSNicholas Bellinger pdv->pdv_channel_id = arg; 7526708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Channel" 753c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 754c66ac9dbSNicholas Bellinger pdv->pdv_channel_id); 755c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; 756c66ac9dbSNicholas Bellinger break; 757c66ac9dbSNicholas Bellinger case Opt_scsi_target_id: 758ce31c1b0SJoern Engel ret = match_int(args, &arg); 759ce31c1b0SJoern Engel if (ret) 760ce31c1b0SJoern Engel goto out; 761c66ac9dbSNicholas Bellinger pdv->pdv_target_id = arg; 7626708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Target" 763c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 764c66ac9dbSNicholas Bellinger pdv->pdv_target_id); 765c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_TARGET_ID; 766c66ac9dbSNicholas Bellinger break; 767c66ac9dbSNicholas Bellinger case Opt_scsi_lun_id: 768ce31c1b0SJoern Engel ret = match_int(args, &arg); 769ce31c1b0SJoern Engel if (ret) 770ce31c1b0SJoern Engel goto out; 771c66ac9dbSNicholas Bellinger pdv->pdv_lun_id = arg; 7726708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:" 773c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_lun_id); 774c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_LUN_ID; 775c66ac9dbSNicholas Bellinger break; 776c66ac9dbSNicholas Bellinger default: 777c66ac9dbSNicholas Bellinger break; 778c66ac9dbSNicholas Bellinger } 779c66ac9dbSNicholas Bellinger } 780c66ac9dbSNicholas Bellinger 781c66ac9dbSNicholas Bellinger out: 782c66ac9dbSNicholas Bellinger kfree(orig); 783c66ac9dbSNicholas Bellinger return (!ret) ? count : ret; 784c66ac9dbSNicholas Bellinger } 785c66ac9dbSNicholas Bellinger 7860fd97ccfSChristoph Hellwig static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b) 787c66ac9dbSNicholas Bellinger { 7880fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 7890fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 790c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 791c66ac9dbSNicholas Bellinger unsigned char host_id[16]; 792c66ac9dbSNicholas Bellinger ssize_t bl; 793c66ac9dbSNicholas Bellinger int i; 794c66ac9dbSNicholas Bellinger 795e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 796c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "%d", pdv->pdv_host_id); 797c66ac9dbSNicholas Bellinger else 798c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "PHBA Mode"); 799c66ac9dbSNicholas Bellinger 800c66ac9dbSNicholas Bellinger bl = sprintf(b, "SCSI Device Bus Location:" 801c66ac9dbSNicholas Bellinger " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", 802c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, 803c66ac9dbSNicholas Bellinger host_id); 804c66ac9dbSNicholas Bellinger 805c66ac9dbSNicholas Bellinger if (sd) { 806c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 807c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "Vendor: "); 808c66ac9dbSNicholas Bellinger for (i = 0; i < 8; i++) { 809c66ac9dbSNicholas Bellinger if (ISPRINT(sd->vendor[i])) /* printable character? */ 810c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->vendor[i]); 811c66ac9dbSNicholas Bellinger else 812c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 813c66ac9dbSNicholas Bellinger } 814c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Model: "); 815c66ac9dbSNicholas Bellinger for (i = 0; i < 16; i++) { 816c66ac9dbSNicholas Bellinger if (ISPRINT(sd->model[i])) /* printable character ? */ 817c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->model[i]); 818c66ac9dbSNicholas Bellinger else 819c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 820c66ac9dbSNicholas Bellinger } 821c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Rev: "); 822c66ac9dbSNicholas Bellinger for (i = 0; i < 4; i++) { 823c66ac9dbSNicholas Bellinger if (ISPRINT(sd->rev[i])) /* printable character ? */ 824c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->rev[i]); 825c66ac9dbSNicholas Bellinger else 826c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 827c66ac9dbSNicholas Bellinger } 828c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "\n"); 829c66ac9dbSNicholas Bellinger } 830c66ac9dbSNicholas Bellinger return bl; 831c66ac9dbSNicholas Bellinger } 832c66ac9dbSNicholas Bellinger 8334246a0b6SChristoph Hellwig static void pscsi_bi_endio(struct bio *bio) 834c66ac9dbSNicholas Bellinger { 835c66ac9dbSNicholas Bellinger bio_put(bio); 836c66ac9dbSNicholas Bellinger } 837c66ac9dbSNicholas Bellinger 8382dbe10a2SAsias He static inline struct bio *pscsi_get_bio(int nr_vecs) 839c66ac9dbSNicholas Bellinger { 840c66ac9dbSNicholas Bellinger struct bio *bio; 841c66ac9dbSNicholas Bellinger /* 842c66ac9dbSNicholas Bellinger * Use bio_malloc() following the comment in for bio -> struct request 843c66ac9dbSNicholas Bellinger * in block/blk-core.c:blk_make_request() 844c66ac9dbSNicholas Bellinger */ 8452dbe10a2SAsias He bio = bio_kmalloc(GFP_KERNEL, nr_vecs); 8466708bb27SAndy Grover if (!bio) { 8476708bb27SAndy Grover pr_err("PSCSI: bio_kmalloc() failed\n"); 848c66ac9dbSNicholas Bellinger return NULL; 849c66ac9dbSNicholas Bellinger } 850c66ac9dbSNicholas Bellinger bio->bi_end_io = pscsi_bi_endio; 851c66ac9dbSNicholas Bellinger 852c66ac9dbSNicholas Bellinger return bio; 853c66ac9dbSNicholas Bellinger } 854c66ac9dbSNicholas Bellinger 855de103c93SChristoph Hellwig static sense_reason_t 856de103c93SChristoph Hellwig pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, 857dd9cf046SChristoph Hellwig struct request *req) 858c66ac9dbSNicholas Bellinger { 8590fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); 860dd9cf046SChristoph Hellwig struct bio *bio = NULL; 861c66ac9dbSNicholas Bellinger struct page *page; 862c66ac9dbSNicholas Bellinger struct scatterlist *sg; 8637a83aa4eSChristoph Hellwig u32 data_len = cmd->data_length, i, len, bytes, off; 8645787cacdSChristoph Hellwig int nr_pages = (cmd->data_length + sgl[0].offset + 865c66ac9dbSNicholas Bellinger PAGE_SIZE - 1) >> PAGE_SHIFT; 86603e98c9eSNicholas Bellinger int nr_vecs = 0, rc; 867dd9cf046SChristoph Hellwig int rw = (cmd->data_direction == DMA_TO_DEVICE); 868c66ac9dbSNicholas Bellinger 869dd9cf046SChristoph Hellwig BUG_ON(!cmd->data_length); 87002b1a746SChristoph Hellwig 8716708bb27SAndy Grover pr_debug("PSCSI: nr_pages: %d\n", nr_pages); 872c66ac9dbSNicholas Bellinger 8735787cacdSChristoph Hellwig for_each_sg(sgl, sg, sgl_nents, i) { 874c66ac9dbSNicholas Bellinger page = sg_page(sg); 875c66ac9dbSNicholas Bellinger off = sg->offset; 876c66ac9dbSNicholas Bellinger len = sg->length; 877c66ac9dbSNicholas Bellinger 8786708bb27SAndy Grover pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i, 879c66ac9dbSNicholas Bellinger page, len, off); 880c66ac9dbSNicholas Bellinger 8818f27d487SAsias He /* 8828f27d487SAsias He * We only have one page of data in each sg element, 8838f27d487SAsias He * we can not cross a page boundary. 8848f27d487SAsias He */ 8858f27d487SAsias He if (off + len > PAGE_SIZE) 8868f27d487SAsias He goto fail; 8878f27d487SAsias He 8888f27d487SAsias He if (len > 0 && data_len > 0) { 889c66ac9dbSNicholas Bellinger bytes = min_t(unsigned int, len, PAGE_SIZE - off); 890c66ac9dbSNicholas Bellinger bytes = min(bytes, data_len); 891c66ac9dbSNicholas Bellinger 8926708bb27SAndy Grover if (!bio) { 893c66ac9dbSNicholas Bellinger nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); 894c66ac9dbSNicholas Bellinger nr_pages -= nr_vecs; 895c66ac9dbSNicholas Bellinger /* 896c66ac9dbSNicholas Bellinger * Calls bio_kmalloc() and sets bio->bi_end_io() 897c66ac9dbSNicholas Bellinger */ 898a1d8b49aSAndy Grover bio = pscsi_get_bio(nr_vecs); 8996708bb27SAndy Grover if (!bio) 900c66ac9dbSNicholas Bellinger goto fail; 901c66ac9dbSNicholas Bellinger 902c66ac9dbSNicholas Bellinger if (rw) 903e742fc32SMike Christie bio_set_op_attrs(bio, REQ_OP_WRITE, 0); 904c66ac9dbSNicholas Bellinger 9056708bb27SAndy Grover pr_debug("PSCSI: Allocated bio: %p," 906c66ac9dbSNicholas Bellinger " dir: %s nr_vecs: %d\n", bio, 907c66ac9dbSNicholas Bellinger (rw) ? "rw" : "r", nr_vecs); 908c66ac9dbSNicholas Bellinger } 909c66ac9dbSNicholas Bellinger 9106708bb27SAndy Grover pr_debug("PSCSI: Calling bio_add_pc_page() i: %d" 911c66ac9dbSNicholas Bellinger " bio: %p page: %p len: %d off: %d\n", i, bio, 912c66ac9dbSNicholas Bellinger page, len, off); 913c66ac9dbSNicholas Bellinger 914c66ac9dbSNicholas Bellinger rc = bio_add_pc_page(pdv->pdv_sd->request_queue, 915c66ac9dbSNicholas Bellinger bio, page, bytes, off); 9166708bb27SAndy Grover pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", 91784c85906SMing Lei bio_segments(bio), nr_vecs); 91884c85906SMing Lei if (rc != bytes) { 9196708bb27SAndy Grover pr_debug("PSCSI: Reached bio->bi_vcnt max:" 920c66ac9dbSNicholas Bellinger " %d i: %d bio: %p, allocating another" 921c66ac9dbSNicholas Bellinger " bio\n", bio->bi_vcnt, i, bio); 922dd9cf046SChristoph Hellwig 923dd9cf046SChristoph Hellwig rc = blk_rq_append_bio(req, bio); 924dd9cf046SChristoph Hellwig if (rc) { 925dd9cf046SChristoph Hellwig pr_err("pSCSI: failed to append bio\n"); 926dd9cf046SChristoph Hellwig goto fail; 927dd9cf046SChristoph Hellwig } 928dd9cf046SChristoph Hellwig 929c66ac9dbSNicholas Bellinger /* 930c66ac9dbSNicholas Bellinger * Clear the pointer so that another bio will 931dd9cf046SChristoph Hellwig * be allocated with pscsi_get_bio() above. 932c66ac9dbSNicholas Bellinger */ 933c66ac9dbSNicholas Bellinger bio = NULL; 934c66ac9dbSNicholas Bellinger } 935c66ac9dbSNicholas Bellinger 936c66ac9dbSNicholas Bellinger data_len -= bytes; 937c66ac9dbSNicholas Bellinger } 938c66ac9dbSNicholas Bellinger } 939c66ac9dbSNicholas Bellinger 940dd9cf046SChristoph Hellwig if (bio) { 941dd9cf046SChristoph Hellwig rc = blk_rq_append_bio(req, bio); 942dd9cf046SChristoph Hellwig if (rc) { 943dd9cf046SChristoph Hellwig pr_err("pSCSI: failed to append bio\n"); 944dd9cf046SChristoph Hellwig goto fail; 945dd9cf046SChristoph Hellwig } 946dd9cf046SChristoph Hellwig } 947dd9cf046SChristoph Hellwig 948de103c93SChristoph Hellwig return 0; 949c66ac9dbSNicholas Bellinger fail: 950de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 951c66ac9dbSNicholas Bellinger } 952c66ac9dbSNicholas Bellinger 953de103c93SChristoph Hellwig static sense_reason_t 954de103c93SChristoph Hellwig pscsi_parse_cdb(struct se_cmd *cmd) 955d6e0175cSChristoph Hellwig { 956de103c93SChristoph Hellwig if (cmd->se_cmd_flags & SCF_BIDI) 957de103c93SChristoph Hellwig return TCM_UNSUPPORTED_SCSI_OPCODE; 958d6e0175cSChristoph Hellwig 9597bfea53bSAndy Grover return passthrough_parse_cdb(cmd, pscsi_execute_cmd); 9608de530a5SChristoph Hellwig } 961d6e0175cSChristoph Hellwig 962de103c93SChristoph Hellwig static sense_reason_t 963de103c93SChristoph Hellwig pscsi_execute_cmd(struct se_cmd *cmd) 964c66ac9dbSNicholas Bellinger { 9650c2ad7d1SChristoph Hellwig struct scatterlist *sgl = cmd->t_data_sg; 9660c2ad7d1SChristoph Hellwig u32 sgl_nents = cmd->t_data_nents; 9670fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); 9685787cacdSChristoph Hellwig struct pscsi_plugin_task *pt; 96902b1a746SChristoph Hellwig struct request *req; 970de103c93SChristoph Hellwig sense_reason_t ret; 971c66ac9dbSNicholas Bellinger 9725787cacdSChristoph Hellwig /* 9735787cacdSChristoph Hellwig * Dynamically alloc cdb space, since it may be larger than 9745787cacdSChristoph Hellwig * TCM_MAX_COMMAND_SIZE 9755787cacdSChristoph Hellwig */ 9765787cacdSChristoph Hellwig pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL); 9775787cacdSChristoph Hellwig if (!pt) { 978de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 9795787cacdSChristoph Hellwig } 9805787cacdSChristoph Hellwig cmd->priv = pt; 9815787cacdSChristoph Hellwig 982ed3102c6SChristoph Hellwig memcpy(pt->pscsi_cdb, cmd->t_task_cdb, 983ed3102c6SChristoph Hellwig scsi_command_size(cmd->t_task_cdb)); 984485fd0d1SChristoph Hellwig 98502b1a746SChristoph Hellwig req = blk_get_request(pdv->pdv_sd->request_queue, 986aebf526bSChristoph Hellwig cmd->data_direction == DMA_TO_DEVICE ? 987aebf526bSChristoph Hellwig REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN, 98802b1a746SChristoph Hellwig GFP_KERNEL); 989a492f075SJoe Lawrence if (IS_ERR(req)) { 990fdb4c1f3SDan Carpenter pr_err("PSCSI: blk_get_request() failed\n"); 991de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 9925787cacdSChristoph Hellwig goto fail; 99302b1a746SChristoph Hellwig } 994f27b087bSJens Axboe 99582ed4db4SChristoph Hellwig scsi_req_init(req); 99602b1a746SChristoph Hellwig 997dd9cf046SChristoph Hellwig if (sgl) { 998dd9cf046SChristoph Hellwig ret = pscsi_map_sg(cmd, sgl, sgl_nents, req); 999de103c93SChristoph Hellwig if (ret) 1000dd9cf046SChristoph Hellwig goto fail_put_request; 100102b1a746SChristoph Hellwig } 100202b1a746SChristoph Hellwig 100302b1a746SChristoph Hellwig req->end_io = pscsi_req_done; 10045787cacdSChristoph Hellwig req->end_io_data = cmd; 100582ed4db4SChristoph Hellwig scsi_req(req)->cmd_len = scsi_command_size(pt->pscsi_cdb); 100682ed4db4SChristoph Hellwig scsi_req(req)->cmd = &pt->pscsi_cdb[0]; 100702b1a746SChristoph Hellwig if (pdv->pdv_sd->type == TYPE_DISK) 100802b1a746SChristoph Hellwig req->timeout = PS_TIMEOUT_DISK; 100902b1a746SChristoph Hellwig else 101002b1a746SChristoph Hellwig req->timeout = PS_TIMEOUT_OTHER; 101102b1a746SChristoph Hellwig req->retries = PS_RETRY; 101202b1a746SChristoph Hellwig 101302b1a746SChristoph Hellwig blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, 101468d81f40SChristoph Hellwig (cmd->sam_task_attr == TCM_HEAD_TAG), 101502b1a746SChristoph Hellwig pscsi_req_done); 101602b1a746SChristoph Hellwig 101703e98c9eSNicholas Bellinger return 0; 101802b1a746SChristoph Hellwig 1019dd9cf046SChristoph Hellwig fail_put_request: 1020dd9cf046SChristoph Hellwig blk_put_request(req); 10215787cacdSChristoph Hellwig fail: 10225787cacdSChristoph Hellwig kfree(pt); 1023de103c93SChristoph Hellwig return ret; 102402b1a746SChristoph Hellwig } 102502b1a746SChristoph Hellwig 1026c66ac9dbSNicholas Bellinger /* pscsi_get_device_type(): 1027c66ac9dbSNicholas Bellinger * 1028c66ac9dbSNicholas Bellinger * 1029c66ac9dbSNicholas Bellinger */ 1030c66ac9dbSNicholas Bellinger static u32 pscsi_get_device_type(struct se_device *dev) 1031c66ac9dbSNicholas Bellinger { 10320fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 1033c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 1034c66ac9dbSNicholas Bellinger 1035215a8fe4SNicholas Bellinger return (sd) ? sd->type : TYPE_NO_LUN; 1036c66ac9dbSNicholas Bellinger } 1037c66ac9dbSNicholas Bellinger 1038c66ac9dbSNicholas Bellinger static sector_t pscsi_get_blocks(struct se_device *dev) 1039c66ac9dbSNicholas Bellinger { 10400fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 1041c66ac9dbSNicholas Bellinger 1042c66ac9dbSNicholas Bellinger if (pdv->pdv_bd && pdv->pdv_bd->bd_part) 1043c66ac9dbSNicholas Bellinger return pdv->pdv_bd->bd_part->nr_sects; 1044c66ac9dbSNicholas Bellinger 1045c66ac9dbSNicholas Bellinger return 0; 1046c66ac9dbSNicholas Bellinger } 1047c66ac9dbSNicholas Bellinger 10485787cacdSChristoph Hellwig static void pscsi_req_done(struct request *req, int uptodate) 1049c66ac9dbSNicholas Bellinger { 10505787cacdSChristoph Hellwig struct se_cmd *cmd = req->end_io_data; 10515787cacdSChristoph Hellwig struct pscsi_plugin_task *pt = cmd->priv; 10525787cacdSChristoph Hellwig 10535787cacdSChristoph Hellwig pt->pscsi_result = req->errors; 105482ed4db4SChristoph Hellwig pt->pscsi_resid = scsi_req(req)->resid_len; 10555787cacdSChristoph Hellwig 10565787cacdSChristoph Hellwig cmd->scsi_status = status_byte(pt->pscsi_result) << 1; 10575787cacdSChristoph Hellwig if (cmd->scsi_status) { 10585787cacdSChristoph Hellwig pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" 10595787cacdSChristoph Hellwig " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], 1060c66ac9dbSNicholas Bellinger pt->pscsi_result); 1061c66ac9dbSNicholas Bellinger } 1062c66ac9dbSNicholas Bellinger 1063c66ac9dbSNicholas Bellinger switch (host_byte(pt->pscsi_result)) { 1064c66ac9dbSNicholas Bellinger case DID_OK: 10655787cacdSChristoph Hellwig target_complete_cmd(cmd, cmd->scsi_status); 1066c66ac9dbSNicholas Bellinger break; 1067c66ac9dbSNicholas Bellinger default: 10685787cacdSChristoph Hellwig pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" 10695787cacdSChristoph Hellwig " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], 1070c66ac9dbSNicholas Bellinger pt->pscsi_result); 10715787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); 1072c66ac9dbSNicholas Bellinger break; 1073c66ac9dbSNicholas Bellinger } 1074c66ac9dbSNicholas Bellinger 107582ed4db4SChristoph Hellwig memcpy(pt->pscsi_sense, scsi_req(req)->sense, TRANSPORT_SENSE_BUFFER); 1076c66ac9dbSNicholas Bellinger __blk_put_request(req->q, req); 10775787cacdSChristoph Hellwig kfree(pt); 1078c66ac9dbSNicholas Bellinger } 1079c66ac9dbSNicholas Bellinger 10800a06d430SChristoph Hellwig static const struct target_backend_ops pscsi_ops = { 1081c66ac9dbSNicholas Bellinger .name = "pscsi", 1082c66ac9dbSNicholas Bellinger .owner = THIS_MODULE, 1083a3541703SAndy Grover .transport_flags = TRANSPORT_FLAG_PASSTHROUGH, 1084c66ac9dbSNicholas Bellinger .attach_hba = pscsi_attach_hba, 1085c66ac9dbSNicholas Bellinger .detach_hba = pscsi_detach_hba, 1086c66ac9dbSNicholas Bellinger .pmode_enable_hba = pscsi_pmode_enable_hba, 10870fd97ccfSChristoph Hellwig .alloc_device = pscsi_alloc_device, 10880fd97ccfSChristoph Hellwig .configure_device = pscsi_configure_device, 1089c66ac9dbSNicholas Bellinger .free_device = pscsi_free_device, 1090c66ac9dbSNicholas Bellinger .transport_complete = pscsi_transport_complete, 1091d6e0175cSChristoph Hellwig .parse_cdb = pscsi_parse_cdb, 1092c66ac9dbSNicholas Bellinger .set_configfs_dev_params = pscsi_set_configfs_dev_params, 1093c66ac9dbSNicholas Bellinger .show_configfs_dev_params = pscsi_show_configfs_dev_params, 1094c66ac9dbSNicholas Bellinger .get_device_type = pscsi_get_device_type, 1095c66ac9dbSNicholas Bellinger .get_blocks = pscsi_get_blocks, 10965873c4d1SChristoph Hellwig .tb_dev_attrib_attrs = passthrough_attrib_attrs, 1097c66ac9dbSNicholas Bellinger }; 1098c66ac9dbSNicholas Bellinger 1099c66ac9dbSNicholas Bellinger static int __init pscsi_module_init(void) 1100c66ac9dbSNicholas Bellinger { 11010a06d430SChristoph Hellwig return transport_backend_register(&pscsi_ops); 1102c66ac9dbSNicholas Bellinger } 1103c66ac9dbSNicholas Bellinger 110463b91d5aSAsias He static void __exit pscsi_module_exit(void) 1105c66ac9dbSNicholas Bellinger { 11060a06d430SChristoph Hellwig target_backend_unregister(&pscsi_ops); 1107c66ac9dbSNicholas Bellinger } 1108c66ac9dbSNicholas Bellinger 1109c66ac9dbSNicholas Bellinger MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); 1110c66ac9dbSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 1111c66ac9dbSNicholas Bellinger MODULE_LICENSE("GPL"); 1112c66ac9dbSNicholas Bellinger 1113c66ac9dbSNicholas Bellinger module_init(pscsi_module_init); 1114c66ac9dbSNicholas Bellinger module_exit(pscsi_module_exit); 1115