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) 157c66ac9dbSNicholas Bellinger return; 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]); 172c66ac9dbSNicholas Bellinger if (!sdev->sector_size) 173c66ac9dbSNicholas Bellinger sdev->sector_size = 1024; 174c66ac9dbSNicholas Bellinger out_free: 175c66ac9dbSNicholas Bellinger kfree(buf); 176c66ac9dbSNicholas Bellinger } 177c66ac9dbSNicholas Bellinger 178c66ac9dbSNicholas Bellinger static void 179c66ac9dbSNicholas Bellinger pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) 180c66ac9dbSNicholas Bellinger { 181c66ac9dbSNicholas Bellinger unsigned char *buf; 182c66ac9dbSNicholas Bellinger 183c66ac9dbSNicholas Bellinger if (sdev->inquiry_len < INQUIRY_LEN) 184c66ac9dbSNicholas Bellinger return; 185c66ac9dbSNicholas Bellinger 186c66ac9dbSNicholas Bellinger buf = sdev->inquiry; 187c66ac9dbSNicholas Bellinger if (!buf) 188c66ac9dbSNicholas Bellinger return; 189c66ac9dbSNicholas Bellinger /* 190c66ac9dbSNicholas Bellinger * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() 191c66ac9dbSNicholas Bellinger */ 192c66ac9dbSNicholas Bellinger memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); 193c66ac9dbSNicholas Bellinger memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); 194c66ac9dbSNicholas Bellinger memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); 195c66ac9dbSNicholas Bellinger } 196c66ac9dbSNicholas Bellinger 197c66ac9dbSNicholas Bellinger static int 198c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) 199c66ac9dbSNicholas Bellinger { 200c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 201c66ac9dbSNicholas Bellinger int ret; 202c66ac9dbSNicholas Bellinger 203c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 204c66ac9dbSNicholas Bellinger if (!buf) 205e3d6f909SAndy Grover return -ENOMEM; 206c66ac9dbSNicholas Bellinger 207c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 208c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 209c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 210c66ac9dbSNicholas Bellinger cdb[2] = 0x80; /* Unit Serial Number */ 211c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; 212c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); 213c66ac9dbSNicholas Bellinger 214c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 215c66ac9dbSNicholas Bellinger INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); 216c66ac9dbSNicholas Bellinger if (ret) 217c66ac9dbSNicholas Bellinger goto out_free; 218c66ac9dbSNicholas Bellinger 219c66ac9dbSNicholas Bellinger snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); 220c66ac9dbSNicholas Bellinger 2210fd97ccfSChristoph Hellwig wwn->t10_dev->dev_flags |= DF_FIRMWARE_VPD_UNIT_SERIAL; 222c66ac9dbSNicholas Bellinger 223c66ac9dbSNicholas Bellinger kfree(buf); 224c66ac9dbSNicholas Bellinger return 0; 225c66ac9dbSNicholas Bellinger 226c66ac9dbSNicholas Bellinger out_free: 227c66ac9dbSNicholas Bellinger kfree(buf); 228e3d6f909SAndy Grover return -EPERM; 229c66ac9dbSNicholas Bellinger } 230c66ac9dbSNicholas Bellinger 231c66ac9dbSNicholas Bellinger static void 232c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, 233c66ac9dbSNicholas Bellinger struct t10_wwn *wwn) 234c66ac9dbSNicholas Bellinger { 235c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; 236c66ac9dbSNicholas Bellinger int ident_len, page_len, off = 4, ret; 237c66ac9dbSNicholas Bellinger struct t10_vpd *vpd; 238c66ac9dbSNicholas Bellinger 239c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 240c66ac9dbSNicholas Bellinger if (!buf) 241c66ac9dbSNicholas Bellinger return; 242c66ac9dbSNicholas Bellinger 243c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 244c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 245c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 246c66ac9dbSNicholas Bellinger cdb[2] = 0x83; /* Device Identifier */ 247c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; 248c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); 249c66ac9dbSNicholas Bellinger 250c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 251c66ac9dbSNicholas Bellinger INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, 252c66ac9dbSNicholas Bellinger NULL, HZ, 1, NULL); 253c66ac9dbSNicholas Bellinger if (ret) 254c66ac9dbSNicholas Bellinger goto out; 255c66ac9dbSNicholas Bellinger 256c66ac9dbSNicholas Bellinger page_len = (buf[2] << 8) | buf[3]; 257c66ac9dbSNicholas Bellinger while (page_len > 0) { 258c66ac9dbSNicholas Bellinger /* Grab a pointer to the Identification descriptor */ 259c66ac9dbSNicholas Bellinger page_83 = &buf[off]; 260c66ac9dbSNicholas Bellinger ident_len = page_83[3]; 261c66ac9dbSNicholas Bellinger if (!ident_len) { 2626708bb27SAndy Grover pr_err("page_83[3]: identifier" 263c66ac9dbSNicholas Bellinger " length zero!\n"); 264c66ac9dbSNicholas Bellinger break; 265c66ac9dbSNicholas Bellinger } 26635d1efe8SMasanari Iida pr_debug("T10 VPD Identifier Length: %d\n", ident_len); 267c66ac9dbSNicholas Bellinger 268c66ac9dbSNicholas Bellinger vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); 269c66ac9dbSNicholas Bellinger if (!vpd) { 2706708bb27SAndy Grover pr_err("Unable to allocate memory for" 271c66ac9dbSNicholas Bellinger " struct t10_vpd\n"); 272c66ac9dbSNicholas Bellinger goto out; 273c66ac9dbSNicholas Bellinger } 274c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&vpd->vpd_list); 275c66ac9dbSNicholas Bellinger 276c66ac9dbSNicholas Bellinger transport_set_vpd_proto_id(vpd, page_83); 277c66ac9dbSNicholas Bellinger transport_set_vpd_assoc(vpd, page_83); 278c66ac9dbSNicholas Bellinger 279c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident_type(vpd, page_83) < 0) { 280c66ac9dbSNicholas Bellinger off += (ident_len + 4); 281c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 282c66ac9dbSNicholas Bellinger kfree(vpd); 283c66ac9dbSNicholas Bellinger continue; 284c66ac9dbSNicholas Bellinger } 285c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident(vpd, page_83) < 0) { 286c66ac9dbSNicholas Bellinger off += (ident_len + 4); 287c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 288c66ac9dbSNicholas Bellinger kfree(vpd); 289c66ac9dbSNicholas Bellinger continue; 290c66ac9dbSNicholas Bellinger } 291c66ac9dbSNicholas Bellinger 292c66ac9dbSNicholas Bellinger list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); 293c66ac9dbSNicholas Bellinger off += (ident_len + 4); 294c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 295c66ac9dbSNicholas Bellinger } 296c66ac9dbSNicholas Bellinger 297c66ac9dbSNicholas Bellinger out: 298c66ac9dbSNicholas Bellinger kfree(buf); 299c66ac9dbSNicholas Bellinger } 300c66ac9dbSNicholas Bellinger 3010fd97ccfSChristoph Hellwig static int pscsi_add_device_to_list(struct se_device *dev, 3020fd97ccfSChristoph Hellwig struct scsi_device *sd) 303c66ac9dbSNicholas Bellinger { 3040fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 3050fd97ccfSChristoph Hellwig struct request_queue *q = sd->request_queue; 306c66ac9dbSNicholas Bellinger 3070fd97ccfSChristoph Hellwig pdv->pdv_sd = sd; 308c66ac9dbSNicholas Bellinger 309c66ac9dbSNicholas Bellinger if (!sd->queue_depth) { 310c66ac9dbSNicholas Bellinger sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; 311c66ac9dbSNicholas Bellinger 3129cb78c16SHannes Reinecke pr_err("Set broken SCSI Device %d:%d:%llu" 313c66ac9dbSNicholas Bellinger " queue_depth to %d\n", sd->channel, sd->id, 314c66ac9dbSNicholas Bellinger sd->lun, sd->queue_depth); 315c66ac9dbSNicholas Bellinger } 3160fd97ccfSChristoph Hellwig 3170fd97ccfSChristoph Hellwig dev->dev_attrib.hw_block_size = sd->sector_size; 3180fd97ccfSChristoph Hellwig dev->dev_attrib.hw_max_sectors = 3190fd97ccfSChristoph Hellwig min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q)); 3200fd97ccfSChristoph Hellwig dev->dev_attrib.hw_queue_depth = sd->queue_depth; 3210fd97ccfSChristoph Hellwig 322c66ac9dbSNicholas Bellinger /* 323c66ac9dbSNicholas Bellinger * Setup our standard INQUIRY info into se_dev->t10_wwn 324c66ac9dbSNicholas Bellinger */ 3250fd97ccfSChristoph Hellwig pscsi_set_inquiry_info(sd, &dev->t10_wwn); 326c66ac9dbSNicholas Bellinger 327c66ac9dbSNicholas Bellinger /* 328c66ac9dbSNicholas Bellinger * Locate VPD WWN Information used for various purposes within 329c66ac9dbSNicholas Bellinger * the Storage Engine. 330c66ac9dbSNicholas Bellinger */ 3310fd97ccfSChristoph Hellwig if (!pscsi_get_inquiry_vpd_serial(sd, &dev->t10_wwn)) { 332c66ac9dbSNicholas Bellinger /* 333c66ac9dbSNicholas Bellinger * If VPD Unit Serial returned GOOD status, try 334c66ac9dbSNicholas Bellinger * VPD Device Identification page (0x83). 335c66ac9dbSNicholas Bellinger */ 3360fd97ccfSChristoph Hellwig pscsi_get_inquiry_vpd_device_ident(sd, &dev->t10_wwn); 337c66ac9dbSNicholas Bellinger } 338c66ac9dbSNicholas Bellinger 339c66ac9dbSNicholas Bellinger /* 340c66ac9dbSNicholas Bellinger * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. 341c66ac9dbSNicholas Bellinger */ 342c66ac9dbSNicholas Bellinger if (sd->type == TYPE_TAPE) 343c66ac9dbSNicholas Bellinger pscsi_tape_read_blocksize(dev, sd); 3440fd97ccfSChristoph Hellwig return 0; 345c66ac9dbSNicholas Bellinger } 346c66ac9dbSNicholas Bellinger 3470fd97ccfSChristoph Hellwig static struct se_device *pscsi_alloc_device(struct se_hba *hba, 3480fd97ccfSChristoph Hellwig const char *name) 349c66ac9dbSNicholas Bellinger { 350c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv; 351c66ac9dbSNicholas Bellinger 352c66ac9dbSNicholas Bellinger pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); 3536708bb27SAndy Grover if (!pdv) { 3546708bb27SAndy Grover pr_err("Unable to allocate memory for struct pscsi_dev_virt\n"); 355c66ac9dbSNicholas Bellinger return NULL; 356c66ac9dbSNicholas Bellinger } 357c66ac9dbSNicholas Bellinger 3586708bb27SAndy Grover pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name); 3590fd97ccfSChristoph Hellwig return &pdv->dev; 360c66ac9dbSNicholas Bellinger } 361c66ac9dbSNicholas Bellinger 362c66ac9dbSNicholas Bellinger /* 363c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 364c66ac9dbSNicholas Bellinger */ 3650fd97ccfSChristoph Hellwig static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd) 3665dd7ed2eSDan Carpenter __releases(sh->host_lock) 367c66ac9dbSNicholas Bellinger { 3680fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 3690fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 370c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 371c66ac9dbSNicholas Bellinger struct block_device *bd; 3720fd97ccfSChristoph Hellwig int ret; 373c66ac9dbSNicholas Bellinger 374c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 3759cb78c16SHannes Reinecke pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n", 376c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 377c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 3780fd97ccfSChristoph Hellwig return -EIO; 379c66ac9dbSNicholas Bellinger } 380c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 381c66ac9dbSNicholas Bellinger /* 382c66ac9dbSNicholas Bellinger * Claim exclusive struct block_device access to struct scsi_device 383c66ac9dbSNicholas Bellinger * for TYPE_DISK using supplied udev_path 384c66ac9dbSNicholas Bellinger */ 3850fd97ccfSChristoph Hellwig bd = blkdev_get_by_path(dev->udev_path, 386c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); 3873ae279d2SDan Carpenter if (IS_ERR(bd)) { 3886708bb27SAndy Grover pr_err("pSCSI: blkdev_get_by_path() failed\n"); 389c66ac9dbSNicholas Bellinger scsi_device_put(sd); 3900fd97ccfSChristoph Hellwig return PTR_ERR(bd); 391c66ac9dbSNicholas Bellinger } 392c66ac9dbSNicholas Bellinger pdv->pdv_bd = bd; 393c66ac9dbSNicholas Bellinger 3940fd97ccfSChristoph Hellwig ret = pscsi_add_device_to_list(dev, sd); 3950fd97ccfSChristoph Hellwig if (ret) { 396c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); 397c66ac9dbSNicholas Bellinger scsi_device_put(sd); 3980fd97ccfSChristoph Hellwig return ret; 399c66ac9dbSNicholas Bellinger } 4000fd97ccfSChristoph Hellwig 4019cb78c16SHannes Reinecke pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%llu\n", 402c66ac9dbSNicholas Bellinger phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); 4030fd97ccfSChristoph Hellwig return 0; 404c66ac9dbSNicholas Bellinger } 405c66ac9dbSNicholas Bellinger 406c66ac9dbSNicholas Bellinger /* 407c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 408c66ac9dbSNicholas Bellinger */ 4090fd97ccfSChristoph Hellwig static int pscsi_create_type_rom(struct se_device *dev, struct scsi_device *sd) 4105dd7ed2eSDan Carpenter __releases(sh->host_lock) 411c66ac9dbSNicholas Bellinger { 4120fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 413c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 4140fd97ccfSChristoph Hellwig int ret; 415c66ac9dbSNicholas Bellinger 416c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 4179cb78c16SHannes Reinecke pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n", 418c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 419c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 4200fd97ccfSChristoph Hellwig return -EIO; 421c66ac9dbSNicholas Bellinger } 422c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 423c66ac9dbSNicholas Bellinger 4240fd97ccfSChristoph Hellwig ret = pscsi_add_device_to_list(dev, sd); 4250fd97ccfSChristoph Hellwig if (ret) { 426c66ac9dbSNicholas Bellinger scsi_device_put(sd); 4270fd97ccfSChristoph Hellwig return ret; 428c66ac9dbSNicholas Bellinger } 4299cb78c16SHannes Reinecke pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n", 430c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 431c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 432c66ac9dbSNicholas Bellinger 4330fd97ccfSChristoph Hellwig return 0; 434c66ac9dbSNicholas Bellinger } 435c66ac9dbSNicholas Bellinger 436c66ac9dbSNicholas Bellinger /* 437c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 438c66ac9dbSNicholas Bellinger */ 4390fd97ccfSChristoph Hellwig static int pscsi_create_type_other(struct se_device *dev, 4400fd97ccfSChristoph Hellwig struct scsi_device *sd) 4415dd7ed2eSDan Carpenter __releases(sh->host_lock) 442c66ac9dbSNicholas Bellinger { 4430fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 444c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 4450fd97ccfSChristoph Hellwig int ret; 446c66ac9dbSNicholas Bellinger 447c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 4480fd97ccfSChristoph Hellwig ret = pscsi_add_device_to_list(dev, sd); 4490fd97ccfSChristoph Hellwig if (ret) 4500fd97ccfSChristoph Hellwig return ret; 451c66ac9dbSNicholas Bellinger 4529cb78c16SHannes Reinecke pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n", 453c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 454c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 4550fd97ccfSChristoph Hellwig return 0; 456c66ac9dbSNicholas Bellinger } 457c66ac9dbSNicholas Bellinger 458ecf0dd66SFengguang Wu static int pscsi_configure_device(struct se_device *dev) 459c66ac9dbSNicholas Bellinger { 4600fd97ccfSChristoph Hellwig struct se_hba *hba = dev->se_hba; 4610fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 462c66ac9dbSNicholas Bellinger struct scsi_device *sd; 4630fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 464c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 465c66ac9dbSNicholas Bellinger int legacy_mode_enable = 0; 4660fd97ccfSChristoph Hellwig int ret; 467c66ac9dbSNicholas Bellinger 4680fd97ccfSChristoph Hellwig if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || 4690fd97ccfSChristoph Hellwig !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || 4700fd97ccfSChristoph Hellwig !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { 4710fd97ccfSChristoph Hellwig pr_err("Missing scsi_channel_id=, scsi_target_id= and" 4720fd97ccfSChristoph Hellwig " scsi_lun_id= parameters\n"); 4730fd97ccfSChristoph Hellwig return -EINVAL; 474c66ac9dbSNicholas Bellinger } 4750fd97ccfSChristoph Hellwig 476c66ac9dbSNicholas Bellinger /* 477c66ac9dbSNicholas Bellinger * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the 478c66ac9dbSNicholas Bellinger * struct Scsi_Host we will need to bring the TCM/pSCSI object online 479c66ac9dbSNicholas Bellinger */ 4806708bb27SAndy Grover if (!sh) { 481c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 4826708bb27SAndy Grover pr_err("pSCSI: Unable to locate struct" 483c66ac9dbSNicholas Bellinger " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); 4840fd97ccfSChristoph Hellwig return -ENODEV; 485c66ac9dbSNicholas Bellinger } 486c66ac9dbSNicholas Bellinger /* 487e6a8a41aSStefan Hajnoczi * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device 488c66ac9dbSNicholas Bellinger * reference, we enforce that udev_path has been set 489c66ac9dbSNicholas Bellinger */ 4900fd97ccfSChristoph Hellwig if (!(dev->dev_flags & DF_USING_UDEV_PATH)) { 4916708bb27SAndy Grover pr_err("pSCSI: udev_path attribute has not" 492c66ac9dbSNicholas Bellinger " been set before ENABLE=1\n"); 4930fd97ccfSChristoph Hellwig return -EINVAL; 494c66ac9dbSNicholas Bellinger } 495c66ac9dbSNicholas Bellinger /* 496e6a8a41aSStefan Hajnoczi * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID, 497c66ac9dbSNicholas Bellinger * use the original TCM hba ID to reference Linux/SCSI Host No 498c66ac9dbSNicholas Bellinger * and enable for PHV_LLD_SCSI_HOST_NO mode. 499c66ac9dbSNicholas Bellinger */ 500c66ac9dbSNicholas Bellinger if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { 5010fd97ccfSChristoph Hellwig if (hba->dev_count) { 5026708bb27SAndy Grover pr_err("pSCSI: Unable to set hba_mode" 503c66ac9dbSNicholas Bellinger " with active devices\n"); 5040fd97ccfSChristoph Hellwig return -EEXIST; 505c66ac9dbSNicholas Bellinger } 506c66ac9dbSNicholas Bellinger 507c66ac9dbSNicholas Bellinger if (pscsi_pmode_enable_hba(hba, 1) != 1) 5080fd97ccfSChristoph Hellwig return -ENODEV; 509c66ac9dbSNicholas Bellinger 510c66ac9dbSNicholas Bellinger legacy_mode_enable = 1; 511c66ac9dbSNicholas Bellinger hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 512c66ac9dbSNicholas Bellinger sh = phv->phv_lld_host; 513c66ac9dbSNicholas Bellinger } else { 514e3d6f909SAndy Grover sh = scsi_host_lookup(pdv->pdv_host_id); 51558932e96SWei Yongjun if (!sh) { 5166708bb27SAndy Grover pr_err("pSCSI: Unable to locate" 517c66ac9dbSNicholas Bellinger " pdv_host_id: %d\n", pdv->pdv_host_id); 51858932e96SWei Yongjun return -EINVAL; 519c66ac9dbSNicholas Bellinger } 5205a7125c6SAndy Grover pdv->pdv_lld_host = sh; 521c66ac9dbSNicholas Bellinger } 522c66ac9dbSNicholas Bellinger } else { 523e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) { 524e6a8a41aSStefan Hajnoczi pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while" 525c66ac9dbSNicholas Bellinger " struct Scsi_Host exists\n"); 5260fd97ccfSChristoph Hellwig return -EEXIST; 527c66ac9dbSNicholas Bellinger } 528c66ac9dbSNicholas Bellinger } 529c66ac9dbSNicholas Bellinger 530c66ac9dbSNicholas Bellinger spin_lock_irq(sh->host_lock); 531c66ac9dbSNicholas Bellinger list_for_each_entry(sd, &sh->__devices, siblings) { 532c66ac9dbSNicholas Bellinger if ((pdv->pdv_channel_id != sd->channel) || 533c66ac9dbSNicholas Bellinger (pdv->pdv_target_id != sd->id) || 534c66ac9dbSNicholas Bellinger (pdv->pdv_lun_id != sd->lun)) 535c66ac9dbSNicholas Bellinger continue; 536c66ac9dbSNicholas Bellinger /* 537c66ac9dbSNicholas Bellinger * Functions will release the held struct scsi_host->host_lock 538c66ac9dbSNicholas Bellinger * before calling calling pscsi_add_device_to_list() to register 539c66ac9dbSNicholas Bellinger * struct scsi_device with target_core_mod. 540c66ac9dbSNicholas Bellinger */ 541c66ac9dbSNicholas Bellinger switch (sd->type) { 542c66ac9dbSNicholas Bellinger case TYPE_DISK: 5430fd97ccfSChristoph Hellwig ret = pscsi_create_type_disk(dev, sd); 544c66ac9dbSNicholas Bellinger break; 545c66ac9dbSNicholas Bellinger case TYPE_ROM: 5460fd97ccfSChristoph Hellwig ret = pscsi_create_type_rom(dev, sd); 547c66ac9dbSNicholas Bellinger break; 548c66ac9dbSNicholas Bellinger default: 5490fd97ccfSChristoph Hellwig ret = pscsi_create_type_other(dev, sd); 550c66ac9dbSNicholas Bellinger break; 551c66ac9dbSNicholas Bellinger } 552c66ac9dbSNicholas Bellinger 5530fd97ccfSChristoph Hellwig if (ret) { 554e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 555c66ac9dbSNicholas Bellinger scsi_host_put(sh); 556c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 557c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 558c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 559c66ac9dbSNicholas Bellinger } 560c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 5610fd97ccfSChristoph Hellwig return ret; 562c66ac9dbSNicholas Bellinger } 5630fd97ccfSChristoph Hellwig return 0; 564c66ac9dbSNicholas Bellinger } 565c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 566c66ac9dbSNicholas Bellinger 5676708bb27SAndy Grover pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, 568c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); 569c66ac9dbSNicholas Bellinger 570e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 571c66ac9dbSNicholas Bellinger scsi_host_put(sh); 572c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 573c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 574c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 575c66ac9dbSNicholas Bellinger } 576c66ac9dbSNicholas Bellinger 5770fd97ccfSChristoph Hellwig return -ENODEV; 578c66ac9dbSNicholas Bellinger } 579c66ac9dbSNicholas Bellinger 5804cc987eaSNicholas Bellinger static void pscsi_dev_call_rcu(struct rcu_head *p) 5814cc987eaSNicholas Bellinger { 5824cc987eaSNicholas Bellinger struct se_device *dev = container_of(p, struct se_device, rcu_head); 5834cc987eaSNicholas Bellinger struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 5844cc987eaSNicholas Bellinger 5854cc987eaSNicholas Bellinger kfree(pdv); 5864cc987eaSNicholas Bellinger } 5874cc987eaSNicholas Bellinger 5880fd97ccfSChristoph Hellwig static void pscsi_free_device(struct se_device *dev) 589c66ac9dbSNicholas Bellinger { 5900fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 5910fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 592c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 593c66ac9dbSNicholas Bellinger 594c66ac9dbSNicholas Bellinger if (sd) { 595c66ac9dbSNicholas Bellinger /* 596c66ac9dbSNicholas Bellinger * Release exclusive pSCSI internal struct block_device claim for 597c66ac9dbSNicholas Bellinger * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() 598c66ac9dbSNicholas Bellinger */ 599c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { 600c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, 601c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL); 602c66ac9dbSNicholas Bellinger pdv->pdv_bd = NULL; 603c66ac9dbSNicholas Bellinger } 604c66ac9dbSNicholas Bellinger /* 605c66ac9dbSNicholas Bellinger * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference 606c66ac9dbSNicholas Bellinger * to struct Scsi_Host now. 607c66ac9dbSNicholas Bellinger */ 608c66ac9dbSNicholas Bellinger if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && 609c66ac9dbSNicholas Bellinger (phv->phv_lld_host != NULL)) 610c66ac9dbSNicholas Bellinger scsi_host_put(phv->phv_lld_host); 6115a7125c6SAndy Grover else if (pdv->pdv_lld_host) 6125a7125c6SAndy Grover scsi_host_put(pdv->pdv_lld_host); 613c66ac9dbSNicholas Bellinger 614c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) 615c66ac9dbSNicholas Bellinger scsi_device_put(sd); 616c66ac9dbSNicholas Bellinger 617c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 618c66ac9dbSNicholas Bellinger } 6194cc987eaSNicholas Bellinger call_rcu(&dev->rcu_head, pscsi_dev_call_rcu); 620c66ac9dbSNicholas Bellinger } 621c66ac9dbSNicholas Bellinger 622d5829eacSPaolo Bonzini static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg, 623d5829eacSPaolo Bonzini unsigned char *sense_buffer) 624c66ac9dbSNicholas Bellinger { 6250fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); 626c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 627c66ac9dbSNicholas Bellinger int result; 6285787cacdSChristoph Hellwig struct pscsi_plugin_task *pt = cmd->priv; 6291d2a2cd9SNicholas Bellinger unsigned char *cdb; 6301d2a2cd9SNicholas Bellinger /* 6311d2a2cd9SNicholas Bellinger * Special case for REPORT_LUNs handling where pscsi_plugin_task has 6321d2a2cd9SNicholas Bellinger * not been allocated because TCM is handling the emulation directly. 6331d2a2cd9SNicholas Bellinger */ 6341d2a2cd9SNicholas Bellinger if (!pt) 635d5829eacSPaolo Bonzini return; 636c66ac9dbSNicholas Bellinger 6371d2a2cd9SNicholas Bellinger cdb = &pt->pscsi_cdb[0]; 638c66ac9dbSNicholas Bellinger result = pt->pscsi_result; 639c66ac9dbSNicholas Bellinger /* 640c66ac9dbSNicholas Bellinger * Hack to make sure that Write-Protect modepage is set if R/O mode is 641c66ac9dbSNicholas Bellinger * forced. 642c66ac9dbSNicholas Bellinger */ 64329a05deeSNicholas Bellinger if (!cmd->data_length) 644c66ac9dbSNicholas Bellinger goto after_mode_sense; 645c66ac9dbSNicholas Bellinger 646306c11b2SPaolo Bonzini if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && 647306c11b2SPaolo Bonzini (status_byte(result) << 1) == SAM_STAT_GOOD) { 64829a05deeSNicholas Bellinger bool read_only = target_lun_is_rdonly(cmd); 64929a05deeSNicholas Bellinger 65029a05deeSNicholas Bellinger if (read_only) { 651de103c93SChristoph Hellwig unsigned char *buf; 652de103c93SChristoph Hellwig 653de103c93SChristoph Hellwig buf = transport_kmap_data_sg(cmd); 654de103c93SChristoph Hellwig if (!buf) 655de103c93SChristoph Hellwig ; /* XXX: TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE */ 656c66ac9dbSNicholas Bellinger 657c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SENSE_10) { 658c66ac9dbSNicholas Bellinger if (!(buf[3] & 0x80)) 659c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 660c66ac9dbSNicholas Bellinger } else { 661c66ac9dbSNicholas Bellinger if (!(buf[2] & 0x80)) 662c66ac9dbSNicholas Bellinger buf[2] |= 0x80; 663c66ac9dbSNicholas Bellinger } 66405d1c7c0SAndy Grover 6655787cacdSChristoph Hellwig transport_kunmap_data_sg(cmd); 666c66ac9dbSNicholas Bellinger } 667c66ac9dbSNicholas Bellinger } 668c66ac9dbSNicholas Bellinger after_mode_sense: 669c66ac9dbSNicholas Bellinger 670306c11b2SPaolo Bonzini if (sd->type != TYPE_TAPE || !cmd->data_length) 671c66ac9dbSNicholas Bellinger goto after_mode_select; 672c66ac9dbSNicholas Bellinger 673c66ac9dbSNicholas Bellinger /* 674c66ac9dbSNicholas Bellinger * Hack to correctly obtain the initiator requested blocksize for 675c66ac9dbSNicholas Bellinger * TYPE_TAPE. Since this value is dependent upon each tape media, 676c66ac9dbSNicholas Bellinger * struct scsi_device->sector_size will not contain the correct value 677c66ac9dbSNicholas Bellinger * by default, so we go ahead and set it so 678c66ac9dbSNicholas Bellinger * TRANSPORT(dev)->get_blockdev() returns the correct value to the 679c66ac9dbSNicholas Bellinger * storage engine. 680c66ac9dbSNicholas Bellinger */ 681c66ac9dbSNicholas Bellinger if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && 682c66ac9dbSNicholas Bellinger (status_byte(result) << 1) == SAM_STAT_GOOD) { 683c66ac9dbSNicholas Bellinger unsigned char *buf; 684c66ac9dbSNicholas Bellinger u16 bdl; 685c66ac9dbSNicholas Bellinger u32 blocksize; 686c66ac9dbSNicholas Bellinger 687c66ac9dbSNicholas Bellinger buf = sg_virt(&sg[0]); 6886708bb27SAndy Grover if (!buf) { 6896708bb27SAndy Grover pr_err("Unable to get buf for scatterlist\n"); 690c66ac9dbSNicholas Bellinger goto after_mode_select; 691c66ac9dbSNicholas Bellinger } 692c66ac9dbSNicholas Bellinger 693c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 694c66ac9dbSNicholas Bellinger bdl = (buf[3]); 695c66ac9dbSNicholas Bellinger else 696c66ac9dbSNicholas Bellinger bdl = (buf[6] << 8) | (buf[7]); 697c66ac9dbSNicholas Bellinger 698c66ac9dbSNicholas Bellinger if (!bdl) 699c66ac9dbSNicholas Bellinger goto after_mode_select; 700c66ac9dbSNicholas Bellinger 701c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 702c66ac9dbSNicholas Bellinger blocksize = (buf[9] << 16) | (buf[10] << 8) | 703c66ac9dbSNicholas Bellinger (buf[11]); 704c66ac9dbSNicholas Bellinger else 705c66ac9dbSNicholas Bellinger blocksize = (buf[13] << 16) | (buf[14] << 8) | 706c66ac9dbSNicholas Bellinger (buf[15]); 707c66ac9dbSNicholas Bellinger 708c66ac9dbSNicholas Bellinger sd->sector_size = blocksize; 709c66ac9dbSNicholas Bellinger } 710c66ac9dbSNicholas Bellinger after_mode_select: 711c66ac9dbSNicholas Bellinger 712d5829eacSPaolo Bonzini if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) { 713d5829eacSPaolo Bonzini memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER); 714d5829eacSPaolo Bonzini cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; 715d5829eacSPaolo Bonzini } 716c66ac9dbSNicholas Bellinger } 717c66ac9dbSNicholas Bellinger 718c66ac9dbSNicholas Bellinger enum { 719c66ac9dbSNicholas Bellinger Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, 720c66ac9dbSNicholas Bellinger Opt_scsi_lun_id, Opt_err 721c66ac9dbSNicholas Bellinger }; 722c66ac9dbSNicholas Bellinger 723c66ac9dbSNicholas Bellinger static match_table_t tokens = { 724c66ac9dbSNicholas Bellinger {Opt_scsi_host_id, "scsi_host_id=%d"}, 725c66ac9dbSNicholas Bellinger {Opt_scsi_channel_id, "scsi_channel_id=%d"}, 726c66ac9dbSNicholas Bellinger {Opt_scsi_target_id, "scsi_target_id=%d"}, 727c66ac9dbSNicholas Bellinger {Opt_scsi_lun_id, "scsi_lun_id=%d"}, 728c66ac9dbSNicholas Bellinger {Opt_err, NULL} 729c66ac9dbSNicholas Bellinger }; 730c66ac9dbSNicholas Bellinger 7310fd97ccfSChristoph Hellwig static ssize_t pscsi_set_configfs_dev_params(struct se_device *dev, 7320fd97ccfSChristoph Hellwig const char *page, ssize_t count) 733c66ac9dbSNicholas Bellinger { 7340fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 7350fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 736c66ac9dbSNicholas Bellinger char *orig, *ptr, *opts; 737c66ac9dbSNicholas Bellinger substring_t args[MAX_OPT_ARGS]; 738c66ac9dbSNicholas Bellinger int ret = 0, arg, token; 739c66ac9dbSNicholas Bellinger 740c66ac9dbSNicholas Bellinger opts = kstrdup(page, GFP_KERNEL); 741c66ac9dbSNicholas Bellinger if (!opts) 742c66ac9dbSNicholas Bellinger return -ENOMEM; 743c66ac9dbSNicholas Bellinger 744c66ac9dbSNicholas Bellinger orig = opts; 745c66ac9dbSNicholas Bellinger 74690c161b6SSebastian Andrzej Siewior while ((ptr = strsep(&opts, ",\n")) != NULL) { 747c66ac9dbSNicholas Bellinger if (!*ptr) 748c66ac9dbSNicholas Bellinger continue; 749c66ac9dbSNicholas Bellinger 750c66ac9dbSNicholas Bellinger token = match_token(ptr, tokens, args); 751c66ac9dbSNicholas Bellinger switch (token) { 752c66ac9dbSNicholas Bellinger case Opt_scsi_host_id: 753c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 7546708bb27SAndy Grover pr_err("PSCSI[%d]: Unable to accept" 755c66ac9dbSNicholas Bellinger " scsi_host_id while phv_mode ==" 756c66ac9dbSNicholas Bellinger " PHV_LLD_SCSI_HOST_NO\n", 757c66ac9dbSNicholas Bellinger phv->phv_host_id); 758c66ac9dbSNicholas Bellinger ret = -EINVAL; 759c66ac9dbSNicholas Bellinger goto out; 760c66ac9dbSNicholas Bellinger } 761ce31c1b0SJoern Engel ret = match_int(args, &arg); 762ce31c1b0SJoern Engel if (ret) 763ce31c1b0SJoern Engel goto out; 764c66ac9dbSNicholas Bellinger pdv->pdv_host_id = arg; 7656708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Host ID:" 766c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_host_id); 767c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; 768c66ac9dbSNicholas Bellinger break; 769c66ac9dbSNicholas Bellinger case Opt_scsi_channel_id: 770ce31c1b0SJoern Engel ret = match_int(args, &arg); 771ce31c1b0SJoern Engel if (ret) 772ce31c1b0SJoern Engel goto out; 773c66ac9dbSNicholas Bellinger pdv->pdv_channel_id = arg; 7746708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Channel" 775c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 776c66ac9dbSNicholas Bellinger pdv->pdv_channel_id); 777c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; 778c66ac9dbSNicholas Bellinger break; 779c66ac9dbSNicholas Bellinger case Opt_scsi_target_id: 780ce31c1b0SJoern Engel ret = match_int(args, &arg); 781ce31c1b0SJoern Engel if (ret) 782ce31c1b0SJoern Engel goto out; 783c66ac9dbSNicholas Bellinger pdv->pdv_target_id = arg; 7846708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Target" 785c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 786c66ac9dbSNicholas Bellinger pdv->pdv_target_id); 787c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_TARGET_ID; 788c66ac9dbSNicholas Bellinger break; 789c66ac9dbSNicholas Bellinger case Opt_scsi_lun_id: 790ce31c1b0SJoern Engel ret = match_int(args, &arg); 791ce31c1b0SJoern Engel if (ret) 792ce31c1b0SJoern Engel goto out; 793c66ac9dbSNicholas Bellinger pdv->pdv_lun_id = arg; 7946708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:" 795c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_lun_id); 796c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_LUN_ID; 797c66ac9dbSNicholas Bellinger break; 798c66ac9dbSNicholas Bellinger default: 799c66ac9dbSNicholas Bellinger break; 800c66ac9dbSNicholas Bellinger } 801c66ac9dbSNicholas Bellinger } 802c66ac9dbSNicholas Bellinger 803c66ac9dbSNicholas Bellinger out: 804c66ac9dbSNicholas Bellinger kfree(orig); 805c66ac9dbSNicholas Bellinger return (!ret) ? count : ret; 806c66ac9dbSNicholas Bellinger } 807c66ac9dbSNicholas Bellinger 8080fd97ccfSChristoph Hellwig static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b) 809c66ac9dbSNicholas Bellinger { 8100fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 8110fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 812c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 813c66ac9dbSNicholas Bellinger unsigned char host_id[16]; 814c66ac9dbSNicholas Bellinger ssize_t bl; 815c66ac9dbSNicholas Bellinger int i; 816c66ac9dbSNicholas Bellinger 817e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 818c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "%d", pdv->pdv_host_id); 819c66ac9dbSNicholas Bellinger else 820c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "PHBA Mode"); 821c66ac9dbSNicholas Bellinger 822c66ac9dbSNicholas Bellinger bl = sprintf(b, "SCSI Device Bus Location:" 823c66ac9dbSNicholas Bellinger " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", 824c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, 825c66ac9dbSNicholas Bellinger host_id); 826c66ac9dbSNicholas Bellinger 827c66ac9dbSNicholas Bellinger if (sd) { 828c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 829c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "Vendor: "); 830c66ac9dbSNicholas Bellinger for (i = 0; i < 8; i++) { 831c66ac9dbSNicholas Bellinger if (ISPRINT(sd->vendor[i])) /* printable character? */ 832c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->vendor[i]); 833c66ac9dbSNicholas Bellinger else 834c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 835c66ac9dbSNicholas Bellinger } 836c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Model: "); 837c66ac9dbSNicholas Bellinger for (i = 0; i < 16; i++) { 838c66ac9dbSNicholas Bellinger if (ISPRINT(sd->model[i])) /* printable character ? */ 839c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->model[i]); 840c66ac9dbSNicholas Bellinger else 841c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 842c66ac9dbSNicholas Bellinger } 843c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Rev: "); 844c66ac9dbSNicholas Bellinger for (i = 0; i < 4; i++) { 845c66ac9dbSNicholas Bellinger if (ISPRINT(sd->rev[i])) /* printable character ? */ 846c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->rev[i]); 847c66ac9dbSNicholas Bellinger else 848c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 849c66ac9dbSNicholas Bellinger } 850c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "\n"); 851c66ac9dbSNicholas Bellinger } 852c66ac9dbSNicholas Bellinger return bl; 853c66ac9dbSNicholas Bellinger } 854c66ac9dbSNicholas Bellinger 8554246a0b6SChristoph Hellwig static void pscsi_bi_endio(struct bio *bio) 856c66ac9dbSNicholas Bellinger { 857c66ac9dbSNicholas Bellinger bio_put(bio); 858c66ac9dbSNicholas Bellinger } 859c66ac9dbSNicholas Bellinger 8602dbe10a2SAsias He static inline struct bio *pscsi_get_bio(int nr_vecs) 861c66ac9dbSNicholas Bellinger { 862c66ac9dbSNicholas Bellinger struct bio *bio; 863c66ac9dbSNicholas Bellinger /* 864c66ac9dbSNicholas Bellinger * Use bio_malloc() following the comment in for bio -> struct request 865c66ac9dbSNicholas Bellinger * in block/blk-core.c:blk_make_request() 866c66ac9dbSNicholas Bellinger */ 8672dbe10a2SAsias He bio = bio_kmalloc(GFP_KERNEL, nr_vecs); 8686708bb27SAndy Grover if (!bio) { 8696708bb27SAndy Grover pr_err("PSCSI: bio_kmalloc() failed\n"); 870c66ac9dbSNicholas Bellinger return NULL; 871c66ac9dbSNicholas Bellinger } 872c66ac9dbSNicholas Bellinger bio->bi_end_io = pscsi_bi_endio; 873c66ac9dbSNicholas Bellinger 874c66ac9dbSNicholas Bellinger return bio; 875c66ac9dbSNicholas Bellinger } 876c66ac9dbSNicholas Bellinger 877de103c93SChristoph Hellwig static sense_reason_t 878de103c93SChristoph Hellwig pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, 879de103c93SChristoph Hellwig enum dma_data_direction data_direction, struct bio **hbio) 880c66ac9dbSNicholas Bellinger { 8810fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); 88202b1a746SChristoph Hellwig struct bio *bio = NULL, *tbio = NULL; 883c66ac9dbSNicholas Bellinger struct page *page; 884c66ac9dbSNicholas Bellinger struct scatterlist *sg; 8857a83aa4eSChristoph Hellwig u32 data_len = cmd->data_length, i, len, bytes, off; 8865787cacdSChristoph Hellwig int nr_pages = (cmd->data_length + sgl[0].offset + 887c66ac9dbSNicholas Bellinger PAGE_SIZE - 1) >> PAGE_SHIFT; 88803e98c9eSNicholas Bellinger int nr_vecs = 0, rc; 8895787cacdSChristoph Hellwig int rw = (data_direction == DMA_TO_DEVICE); 890c66ac9dbSNicholas Bellinger 89102b1a746SChristoph Hellwig *hbio = NULL; 89202b1a746SChristoph Hellwig 8936708bb27SAndy Grover pr_debug("PSCSI: nr_pages: %d\n", nr_pages); 894c66ac9dbSNicholas Bellinger 8955787cacdSChristoph Hellwig for_each_sg(sgl, sg, sgl_nents, i) { 896c66ac9dbSNicholas Bellinger page = sg_page(sg); 897c66ac9dbSNicholas Bellinger off = sg->offset; 898c66ac9dbSNicholas Bellinger len = sg->length; 899c66ac9dbSNicholas Bellinger 9006708bb27SAndy Grover pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i, 901c66ac9dbSNicholas Bellinger page, len, off); 902c66ac9dbSNicholas Bellinger 9038f27d487SAsias He /* 9048f27d487SAsias He * We only have one page of data in each sg element, 9058f27d487SAsias He * we can not cross a page boundary. 9068f27d487SAsias He */ 9078f27d487SAsias He if (off + len > PAGE_SIZE) 9088f27d487SAsias He goto fail; 9098f27d487SAsias He 9108f27d487SAsias He if (len > 0 && data_len > 0) { 911c66ac9dbSNicholas Bellinger bytes = min_t(unsigned int, len, PAGE_SIZE - off); 912c66ac9dbSNicholas Bellinger bytes = min(bytes, data_len); 913c66ac9dbSNicholas Bellinger 9146708bb27SAndy Grover if (!bio) { 915c66ac9dbSNicholas Bellinger nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); 916c66ac9dbSNicholas Bellinger nr_pages -= nr_vecs; 917c66ac9dbSNicholas Bellinger /* 918c66ac9dbSNicholas Bellinger * Calls bio_kmalloc() and sets bio->bi_end_io() 919c66ac9dbSNicholas Bellinger */ 920a1d8b49aSAndy Grover bio = pscsi_get_bio(nr_vecs); 9216708bb27SAndy Grover if (!bio) 922c66ac9dbSNicholas Bellinger goto fail; 923c66ac9dbSNicholas Bellinger 924c66ac9dbSNicholas Bellinger if (rw) 925e742fc32SMike Christie bio_set_op_attrs(bio, REQ_OP_WRITE, 0); 926c66ac9dbSNicholas Bellinger 9276708bb27SAndy Grover pr_debug("PSCSI: Allocated bio: %p," 928c66ac9dbSNicholas Bellinger " dir: %s nr_vecs: %d\n", bio, 929c66ac9dbSNicholas Bellinger (rw) ? "rw" : "r", nr_vecs); 930c66ac9dbSNicholas Bellinger /* 931c66ac9dbSNicholas Bellinger * Set *hbio pointer to handle the case: 932c66ac9dbSNicholas Bellinger * nr_pages > BIO_MAX_PAGES, where additional 933c66ac9dbSNicholas Bellinger * bios need to be added to complete a given 9345787cacdSChristoph Hellwig * command. 935c66ac9dbSNicholas Bellinger */ 93602b1a746SChristoph Hellwig if (!*hbio) 93702b1a746SChristoph Hellwig *hbio = tbio = bio; 938c66ac9dbSNicholas Bellinger else 939c66ac9dbSNicholas Bellinger tbio = tbio->bi_next = bio; 940c66ac9dbSNicholas Bellinger } 941c66ac9dbSNicholas Bellinger 9426708bb27SAndy Grover pr_debug("PSCSI: Calling bio_add_pc_page() i: %d" 943c66ac9dbSNicholas Bellinger " bio: %p page: %p len: %d off: %d\n", i, bio, 944c66ac9dbSNicholas Bellinger page, len, off); 945c66ac9dbSNicholas Bellinger 946c66ac9dbSNicholas Bellinger rc = bio_add_pc_page(pdv->pdv_sd->request_queue, 947c66ac9dbSNicholas Bellinger bio, page, bytes, off); 948c66ac9dbSNicholas Bellinger if (rc != bytes) 949c66ac9dbSNicholas Bellinger goto fail; 950c66ac9dbSNicholas Bellinger 9516708bb27SAndy Grover pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", 952c66ac9dbSNicholas Bellinger bio->bi_vcnt, nr_vecs); 953c66ac9dbSNicholas Bellinger 954c66ac9dbSNicholas Bellinger if (bio->bi_vcnt > nr_vecs) { 9556708bb27SAndy Grover pr_debug("PSCSI: Reached bio->bi_vcnt max:" 956c66ac9dbSNicholas Bellinger " %d i: %d bio: %p, allocating another" 957c66ac9dbSNicholas Bellinger " bio\n", bio->bi_vcnt, i, bio); 958c66ac9dbSNicholas Bellinger /* 959c66ac9dbSNicholas Bellinger * Clear the pointer so that another bio will 960c66ac9dbSNicholas Bellinger * be allocated with pscsi_get_bio() above, the 961c66ac9dbSNicholas Bellinger * current bio has already been set *tbio and 962c66ac9dbSNicholas Bellinger * bio->bi_next. 963c66ac9dbSNicholas Bellinger */ 964c66ac9dbSNicholas Bellinger bio = NULL; 965c66ac9dbSNicholas Bellinger } 966c66ac9dbSNicholas Bellinger 967c66ac9dbSNicholas Bellinger data_len -= bytes; 968c66ac9dbSNicholas Bellinger } 969c66ac9dbSNicholas Bellinger } 970c66ac9dbSNicholas Bellinger 971de103c93SChristoph Hellwig return 0; 972c66ac9dbSNicholas Bellinger fail: 97302b1a746SChristoph Hellwig while (*hbio) { 97402b1a746SChristoph Hellwig bio = *hbio; 97502b1a746SChristoph Hellwig *hbio = (*hbio)->bi_next; 9764246a0b6SChristoph Hellwig bio_endio(bio); 977c66ac9dbSNicholas Bellinger } 978de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 979c66ac9dbSNicholas Bellinger } 980c66ac9dbSNicholas Bellinger 981de103c93SChristoph Hellwig static sense_reason_t 982de103c93SChristoph Hellwig pscsi_parse_cdb(struct se_cmd *cmd) 983d6e0175cSChristoph Hellwig { 984de103c93SChristoph Hellwig if (cmd->se_cmd_flags & SCF_BIDI) 985de103c93SChristoph Hellwig return TCM_UNSUPPORTED_SCSI_OPCODE; 986d6e0175cSChristoph Hellwig 9877bfea53bSAndy Grover return passthrough_parse_cdb(cmd, pscsi_execute_cmd); 9888de530a5SChristoph Hellwig } 989d6e0175cSChristoph Hellwig 990de103c93SChristoph Hellwig static sense_reason_t 991de103c93SChristoph Hellwig pscsi_execute_cmd(struct se_cmd *cmd) 992c66ac9dbSNicholas Bellinger { 9930c2ad7d1SChristoph Hellwig struct scatterlist *sgl = cmd->t_data_sg; 9940c2ad7d1SChristoph Hellwig u32 sgl_nents = cmd->t_data_nents; 9950c2ad7d1SChristoph Hellwig enum dma_data_direction data_direction = cmd->data_direction; 9960fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); 9975787cacdSChristoph Hellwig struct pscsi_plugin_task *pt; 99802b1a746SChristoph Hellwig struct request *req; 99902b1a746SChristoph Hellwig struct bio *hbio; 1000de103c93SChristoph Hellwig sense_reason_t ret; 1001c66ac9dbSNicholas Bellinger 10025787cacdSChristoph Hellwig /* 10035787cacdSChristoph Hellwig * Dynamically alloc cdb space, since it may be larger than 10045787cacdSChristoph Hellwig * TCM_MAX_COMMAND_SIZE 10055787cacdSChristoph Hellwig */ 10065787cacdSChristoph Hellwig pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL); 10075787cacdSChristoph Hellwig if (!pt) { 1008de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 10095787cacdSChristoph Hellwig } 10105787cacdSChristoph Hellwig cmd->priv = pt; 10115787cacdSChristoph Hellwig 1012ed3102c6SChristoph Hellwig memcpy(pt->pscsi_cdb, cmd->t_task_cdb, 1013ed3102c6SChristoph Hellwig scsi_command_size(cmd->t_task_cdb)); 1014485fd0d1SChristoph Hellwig 101564f1db38SChristoph Hellwig if (!sgl) { 101602b1a746SChristoph Hellwig req = blk_get_request(pdv->pdv_sd->request_queue, 10175787cacdSChristoph Hellwig (data_direction == DMA_TO_DEVICE), 101802b1a746SChristoph Hellwig GFP_KERNEL); 1019a492f075SJoe Lawrence if (IS_ERR(req)) { 1020fdb4c1f3SDan Carpenter pr_err("PSCSI: blk_get_request() failed\n"); 1021de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 10225787cacdSChristoph Hellwig goto fail; 102302b1a746SChristoph Hellwig } 1024f27b087bSJens Axboe 1025f27b087bSJens Axboe blk_rq_set_block_pc(req); 102602b1a746SChristoph Hellwig } else { 10277a83aa4eSChristoph Hellwig BUG_ON(!cmd->data_length); 102802b1a746SChristoph Hellwig 10295787cacdSChristoph Hellwig ret = pscsi_map_sg(cmd, sgl, sgl_nents, data_direction, &hbio); 1030de103c93SChristoph Hellwig if (ret) 10315787cacdSChristoph Hellwig goto fail; 1032c66ac9dbSNicholas Bellinger 103302b1a746SChristoph Hellwig req = blk_make_request(pdv->pdv_sd->request_queue, hbio, 103402b1a746SChristoph Hellwig GFP_KERNEL); 1035ed327ed3SDan Carpenter if (IS_ERR(req)) { 103602b1a746SChristoph Hellwig pr_err("pSCSI: blk_make_request() failed\n"); 1037de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 10385787cacdSChristoph Hellwig goto fail_free_bio; 103902b1a746SChristoph Hellwig } 104002b1a746SChristoph Hellwig } 104102b1a746SChristoph Hellwig 104202b1a746SChristoph Hellwig req->end_io = pscsi_req_done; 10435787cacdSChristoph Hellwig req->end_io_data = cmd; 104402b1a746SChristoph Hellwig req->cmd_len = scsi_command_size(pt->pscsi_cdb); 104502b1a746SChristoph Hellwig req->cmd = &pt->pscsi_cdb[0]; 104602b1a746SChristoph Hellwig req->sense = &pt->pscsi_sense[0]; 104702b1a746SChristoph Hellwig req->sense_len = 0; 104802b1a746SChristoph Hellwig if (pdv->pdv_sd->type == TYPE_DISK) 104902b1a746SChristoph Hellwig req->timeout = PS_TIMEOUT_DISK; 105002b1a746SChristoph Hellwig else 105102b1a746SChristoph Hellwig req->timeout = PS_TIMEOUT_OTHER; 105202b1a746SChristoph Hellwig req->retries = PS_RETRY; 105302b1a746SChristoph Hellwig 105402b1a746SChristoph Hellwig blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, 105568d81f40SChristoph Hellwig (cmd->sam_task_attr == TCM_HEAD_TAG), 105602b1a746SChristoph Hellwig pscsi_req_done); 105702b1a746SChristoph Hellwig 105803e98c9eSNicholas Bellinger return 0; 105902b1a746SChristoph Hellwig 10605787cacdSChristoph Hellwig fail_free_bio: 106102b1a746SChristoph Hellwig while (hbio) { 106202b1a746SChristoph Hellwig struct bio *bio = hbio; 106302b1a746SChristoph Hellwig hbio = hbio->bi_next; 10644246a0b6SChristoph Hellwig bio_endio(bio); 106502b1a746SChristoph Hellwig } 1066de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 10675787cacdSChristoph Hellwig fail: 10685787cacdSChristoph Hellwig kfree(pt); 1069de103c93SChristoph Hellwig return ret; 107002b1a746SChristoph Hellwig } 107102b1a746SChristoph Hellwig 1072c66ac9dbSNicholas Bellinger /* pscsi_get_device_type(): 1073c66ac9dbSNicholas Bellinger * 1074c66ac9dbSNicholas Bellinger * 1075c66ac9dbSNicholas Bellinger */ 1076c66ac9dbSNicholas Bellinger static u32 pscsi_get_device_type(struct se_device *dev) 1077c66ac9dbSNicholas Bellinger { 10780fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 1079c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 1080c66ac9dbSNicholas Bellinger 1081215a8fe4SNicholas Bellinger return (sd) ? sd->type : TYPE_NO_LUN; 1082c66ac9dbSNicholas Bellinger } 1083c66ac9dbSNicholas Bellinger 1084c66ac9dbSNicholas Bellinger static sector_t pscsi_get_blocks(struct se_device *dev) 1085c66ac9dbSNicholas Bellinger { 10860fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 1087c66ac9dbSNicholas Bellinger 1088c66ac9dbSNicholas Bellinger if (pdv->pdv_bd && pdv->pdv_bd->bd_part) 1089c66ac9dbSNicholas Bellinger return pdv->pdv_bd->bd_part->nr_sects; 1090c66ac9dbSNicholas Bellinger 1091c66ac9dbSNicholas Bellinger dump_stack(); 1092c66ac9dbSNicholas Bellinger return 0; 1093c66ac9dbSNicholas Bellinger } 1094c66ac9dbSNicholas Bellinger 10955787cacdSChristoph Hellwig static void pscsi_req_done(struct request *req, int uptodate) 1096c66ac9dbSNicholas Bellinger { 10975787cacdSChristoph Hellwig struct se_cmd *cmd = req->end_io_data; 10985787cacdSChristoph Hellwig struct pscsi_plugin_task *pt = cmd->priv; 10995787cacdSChristoph Hellwig 11005787cacdSChristoph Hellwig pt->pscsi_result = req->errors; 11015787cacdSChristoph Hellwig pt->pscsi_resid = req->resid_len; 11025787cacdSChristoph Hellwig 11035787cacdSChristoph Hellwig cmd->scsi_status = status_byte(pt->pscsi_result) << 1; 11045787cacdSChristoph Hellwig if (cmd->scsi_status) { 11055787cacdSChristoph Hellwig pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" 11065787cacdSChristoph Hellwig " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], 1107c66ac9dbSNicholas Bellinger pt->pscsi_result); 1108c66ac9dbSNicholas Bellinger } 1109c66ac9dbSNicholas Bellinger 1110c66ac9dbSNicholas Bellinger switch (host_byte(pt->pscsi_result)) { 1111c66ac9dbSNicholas Bellinger case DID_OK: 11125787cacdSChristoph Hellwig target_complete_cmd(cmd, cmd->scsi_status); 1113c66ac9dbSNicholas Bellinger break; 1114c66ac9dbSNicholas Bellinger default: 11155787cacdSChristoph Hellwig pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" 11165787cacdSChristoph Hellwig " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], 1117c66ac9dbSNicholas Bellinger pt->pscsi_result); 11185787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); 1119c66ac9dbSNicholas Bellinger break; 1120c66ac9dbSNicholas Bellinger } 1121c66ac9dbSNicholas Bellinger 1122c66ac9dbSNicholas Bellinger __blk_put_request(req->q, req); 11235787cacdSChristoph Hellwig kfree(pt); 1124c66ac9dbSNicholas Bellinger } 1125c66ac9dbSNicholas Bellinger 11260a06d430SChristoph Hellwig static const struct target_backend_ops pscsi_ops = { 1127c66ac9dbSNicholas Bellinger .name = "pscsi", 1128c66ac9dbSNicholas Bellinger .owner = THIS_MODULE, 1129a3541703SAndy Grover .transport_flags = TRANSPORT_FLAG_PASSTHROUGH, 1130c66ac9dbSNicholas Bellinger .attach_hba = pscsi_attach_hba, 1131c66ac9dbSNicholas Bellinger .detach_hba = pscsi_detach_hba, 1132c66ac9dbSNicholas Bellinger .pmode_enable_hba = pscsi_pmode_enable_hba, 11330fd97ccfSChristoph Hellwig .alloc_device = pscsi_alloc_device, 11340fd97ccfSChristoph Hellwig .configure_device = pscsi_configure_device, 1135c66ac9dbSNicholas Bellinger .free_device = pscsi_free_device, 1136c66ac9dbSNicholas Bellinger .transport_complete = pscsi_transport_complete, 1137d6e0175cSChristoph Hellwig .parse_cdb = pscsi_parse_cdb, 1138c66ac9dbSNicholas Bellinger .set_configfs_dev_params = pscsi_set_configfs_dev_params, 1139c66ac9dbSNicholas Bellinger .show_configfs_dev_params = pscsi_show_configfs_dev_params, 1140c66ac9dbSNicholas Bellinger .get_device_type = pscsi_get_device_type, 1141c66ac9dbSNicholas Bellinger .get_blocks = pscsi_get_blocks, 11425873c4d1SChristoph Hellwig .tb_dev_attrib_attrs = passthrough_attrib_attrs, 1143c66ac9dbSNicholas Bellinger }; 1144c66ac9dbSNicholas Bellinger 1145c66ac9dbSNicholas Bellinger static int __init pscsi_module_init(void) 1146c66ac9dbSNicholas Bellinger { 11470a06d430SChristoph Hellwig return transport_backend_register(&pscsi_ops); 1148c66ac9dbSNicholas Bellinger } 1149c66ac9dbSNicholas Bellinger 115063b91d5aSAsias He static void __exit pscsi_module_exit(void) 1151c66ac9dbSNicholas Bellinger { 11520a06d430SChristoph Hellwig target_backend_unregister(&pscsi_ops); 1153c66ac9dbSNicholas Bellinger } 1154c66ac9dbSNicholas Bellinger 1155c66ac9dbSNicholas Bellinger MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); 1156c66ac9dbSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 1157c66ac9dbSNicholas Bellinger MODULE_LICENSE("GPL"); 1158c66ac9dbSNicholas Bellinger 1159c66ac9dbSNicholas Bellinger module_init(pscsi_module_init); 1160c66ac9dbSNicholas Bellinger module_exit(pscsi_module_exit); 1161