1c66ac9dbSNicholas Bellinger /******************************************************************************* 2c66ac9dbSNicholas Bellinger * Filename: target_core_pscsi.c 3c66ac9dbSNicholas Bellinger * 4c66ac9dbSNicholas Bellinger * This file contains the generic target mode <-> Linux SCSI subsystem plugin. 5c66ac9dbSNicholas Bellinger * 64c76251eSNicholas Bellinger * (c) Copyright 2003-2013 Datera, Inc. 7c66ac9dbSNicholas Bellinger * 8c66ac9dbSNicholas Bellinger * Nicholas A. Bellinger <nab@kernel.org> 9c66ac9dbSNicholas Bellinger * 10c66ac9dbSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 11c66ac9dbSNicholas Bellinger * it under the terms of the GNU General Public License as published by 12c66ac9dbSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 13c66ac9dbSNicholas Bellinger * (at your option) any later version. 14c66ac9dbSNicholas Bellinger * 15c66ac9dbSNicholas Bellinger * This program is distributed in the hope that it will be useful, 16c66ac9dbSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 17c66ac9dbSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18c66ac9dbSNicholas Bellinger * GNU General Public License for more details. 19c66ac9dbSNicholas Bellinger * 20c66ac9dbSNicholas Bellinger * You should have received a copy of the GNU General Public License 21c66ac9dbSNicholas Bellinger * along with this program; if not, write to the Free Software 22c66ac9dbSNicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 23c66ac9dbSNicholas Bellinger * 24c66ac9dbSNicholas Bellinger ******************************************************************************/ 25c66ac9dbSNicholas Bellinger 26c66ac9dbSNicholas Bellinger #include <linux/string.h> 27c66ac9dbSNicholas Bellinger #include <linux/parser.h> 28c66ac9dbSNicholas Bellinger #include <linux/timer.h> 29c66ac9dbSNicholas Bellinger #include <linux/blkdev.h> 30c66ac9dbSNicholas Bellinger #include <linux/blk_types.h> 31c66ac9dbSNicholas Bellinger #include <linux/slab.h> 32c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 33c66ac9dbSNicholas Bellinger #include <linux/genhd.h> 34c66ac9dbSNicholas Bellinger #include <linux/cdrom.h> 35d6e0175cSChristoph Hellwig #include <linux/ratelimit.h> 36827509e3SPaul Gortmaker #include <linux/module.h> 37d6e0175cSChristoph Hellwig #include <asm/unaligned.h> 38d6e0175cSChristoph Hellwig 39c66ac9dbSNicholas Bellinger #include <scsi/scsi.h> 40c66ac9dbSNicholas Bellinger #include <scsi/scsi_device.h> 41c66ac9dbSNicholas Bellinger #include <scsi/scsi_cmnd.h> 42c66ac9dbSNicholas Bellinger #include <scsi/scsi_host.h> 43e66ecd50SNicholas Bellinger #include <scsi/scsi_tcq.h> 44c66ac9dbSNicholas Bellinger 45c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 46c4795fb2SChristoph Hellwig #include <target/target_core_backend.h> 476cfb546bSNicholas Bellinger #include <target/target_core_backend_configfs.h> 48c66ac9dbSNicholas Bellinger 49d6e0175cSChristoph Hellwig #include "target_core_alua.h" 50c66ac9dbSNicholas Bellinger #include "target_core_pscsi.h" 51c66ac9dbSNicholas Bellinger 52c66ac9dbSNicholas Bellinger #define ISPRINT(a) ((a >= ' ') && (a <= '~')) 53c66ac9dbSNicholas Bellinger 540fd97ccfSChristoph Hellwig static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev) 550fd97ccfSChristoph Hellwig { 560fd97ccfSChristoph Hellwig return container_of(dev, struct pscsi_dev_virt, dev); 570fd97ccfSChristoph Hellwig } 580fd97ccfSChristoph Hellwig 59c66ac9dbSNicholas Bellinger static struct se_subsystem_api pscsi_template; 60c66ac9dbSNicholas Bellinger 61de103c93SChristoph Hellwig static sense_reason_t pscsi_execute_cmd(struct se_cmd *cmd); 62c66ac9dbSNicholas Bellinger static void pscsi_req_done(struct request *, int); 63c66ac9dbSNicholas Bellinger 64c66ac9dbSNicholas Bellinger /* pscsi_attach_hba(): 65c66ac9dbSNicholas Bellinger * 66c66ac9dbSNicholas Bellinger * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. 67c66ac9dbSNicholas Bellinger * from the passed SCSI Host ID. 68c66ac9dbSNicholas Bellinger */ 69c66ac9dbSNicholas Bellinger static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) 70c66ac9dbSNicholas Bellinger { 71c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv; 72c66ac9dbSNicholas Bellinger 73c66ac9dbSNicholas Bellinger phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); 746708bb27SAndy Grover if (!phv) { 756708bb27SAndy Grover pr_err("Unable to allocate struct pscsi_hba_virt\n"); 76e3d6f909SAndy Grover return -ENOMEM; 77c66ac9dbSNicholas Bellinger } 78c66ac9dbSNicholas Bellinger phv->phv_host_id = host_id; 79e6a8a41aSStefan Hajnoczi phv->phv_mode = PHV_VIRTUAL_HOST_ID; 80c66ac9dbSNicholas Bellinger 815951146dSAndy Grover hba->hba_ptr = phv; 82c66ac9dbSNicholas Bellinger 836708bb27SAndy Grover pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on" 84c66ac9dbSNicholas Bellinger " Generic Target Core Stack %s\n", hba->hba_id, 85c66ac9dbSNicholas Bellinger PSCSI_VERSION, TARGET_CORE_MOD_VERSION); 866708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n", 87e3d6f909SAndy Grover hba->hba_id); 88c66ac9dbSNicholas Bellinger 89c66ac9dbSNicholas Bellinger return 0; 90c66ac9dbSNicholas Bellinger } 91c66ac9dbSNicholas Bellinger 92c66ac9dbSNicholas Bellinger static void pscsi_detach_hba(struct se_hba *hba) 93c66ac9dbSNicholas Bellinger { 94c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 95c66ac9dbSNicholas Bellinger struct Scsi_Host *scsi_host = phv->phv_lld_host; 96c66ac9dbSNicholas Bellinger 97c66ac9dbSNicholas Bellinger if (scsi_host) { 98c66ac9dbSNicholas Bellinger scsi_host_put(scsi_host); 99c66ac9dbSNicholas Bellinger 1006708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from" 101c66ac9dbSNicholas Bellinger " Generic Target Core\n", hba->hba_id, 102c66ac9dbSNicholas Bellinger (scsi_host->hostt->name) ? (scsi_host->hostt->name) : 103c66ac9dbSNicholas Bellinger "Unknown"); 104c66ac9dbSNicholas Bellinger } else 1056708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA" 106c66ac9dbSNicholas Bellinger " from Generic Target Core\n", hba->hba_id); 107c66ac9dbSNicholas Bellinger 108c66ac9dbSNicholas Bellinger kfree(phv); 109c66ac9dbSNicholas Bellinger hba->hba_ptr = NULL; 110c66ac9dbSNicholas Bellinger } 111c66ac9dbSNicholas Bellinger 112c66ac9dbSNicholas Bellinger static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) 113c66ac9dbSNicholas Bellinger { 1148359cf43SJörn Engel struct pscsi_hba_virt *phv = hba->hba_ptr; 115c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 116c66ac9dbSNicholas Bellinger /* 117c66ac9dbSNicholas Bellinger * Release the struct Scsi_Host 118c66ac9dbSNicholas Bellinger */ 1196708bb27SAndy Grover if (!mode_flag) { 1206708bb27SAndy Grover if (!sh) 121c66ac9dbSNicholas Bellinger return 0; 122c66ac9dbSNicholas Bellinger 123c66ac9dbSNicholas Bellinger phv->phv_lld_host = NULL; 124e6a8a41aSStefan Hajnoczi phv->phv_mode = PHV_VIRTUAL_HOST_ID; 125c66ac9dbSNicholas Bellinger 1266708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" 127c66ac9dbSNicholas Bellinger " %s\n", hba->hba_id, (sh->hostt->name) ? 128c66ac9dbSNicholas Bellinger (sh->hostt->name) : "Unknown"); 129c66ac9dbSNicholas Bellinger 130c66ac9dbSNicholas Bellinger scsi_host_put(sh); 131c66ac9dbSNicholas Bellinger return 0; 132c66ac9dbSNicholas Bellinger } 133c66ac9dbSNicholas Bellinger /* 134c66ac9dbSNicholas Bellinger * Otherwise, locate struct Scsi_Host from the original passed 135c66ac9dbSNicholas Bellinger * pSCSI Host ID and enable for phba mode 136c66ac9dbSNicholas Bellinger */ 137e3d6f909SAndy Grover sh = scsi_host_lookup(phv->phv_host_id); 13858932e96SWei Yongjun if (!sh) { 1396708bb27SAndy Grover pr_err("pSCSI: Unable to locate SCSI Host for" 140c66ac9dbSNicholas Bellinger " phv_host_id: %d\n", phv->phv_host_id); 14158932e96SWei Yongjun return -EINVAL; 142c66ac9dbSNicholas Bellinger } 143c66ac9dbSNicholas Bellinger 144c66ac9dbSNicholas Bellinger phv->phv_lld_host = sh; 145c66ac9dbSNicholas Bellinger phv->phv_mode = PHV_LLD_SCSI_HOST_NO; 146c66ac9dbSNicholas Bellinger 1476708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", 148c66ac9dbSNicholas Bellinger hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); 149c66ac9dbSNicholas Bellinger 150c66ac9dbSNicholas Bellinger return 1; 151c66ac9dbSNicholas Bellinger } 152c66ac9dbSNicholas Bellinger 153c66ac9dbSNicholas Bellinger static void pscsi_tape_read_blocksize(struct se_device *dev, 154c66ac9dbSNicholas Bellinger struct scsi_device *sdev) 155c66ac9dbSNicholas Bellinger { 156c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 157c66ac9dbSNicholas Bellinger int ret; 158c66ac9dbSNicholas Bellinger 159c66ac9dbSNicholas Bellinger buf = kzalloc(12, GFP_KERNEL); 160c66ac9dbSNicholas Bellinger if (!buf) 161c66ac9dbSNicholas Bellinger return; 162c66ac9dbSNicholas Bellinger 163c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 164c66ac9dbSNicholas Bellinger cdb[0] = MODE_SENSE; 165c66ac9dbSNicholas Bellinger cdb[4] = 0x0c; /* 12 bytes */ 166c66ac9dbSNicholas Bellinger 167c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, 168c66ac9dbSNicholas Bellinger HZ, 1, NULL); 169c66ac9dbSNicholas Bellinger if (ret) 170c66ac9dbSNicholas Bellinger goto out_free; 171c66ac9dbSNicholas Bellinger 172c66ac9dbSNicholas Bellinger /* 173c66ac9dbSNicholas Bellinger * If MODE_SENSE still returns zero, set the default value to 1024. 174c66ac9dbSNicholas Bellinger */ 175c66ac9dbSNicholas Bellinger sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); 176c66ac9dbSNicholas Bellinger if (!sdev->sector_size) 177c66ac9dbSNicholas Bellinger sdev->sector_size = 1024; 178c66ac9dbSNicholas Bellinger out_free: 179c66ac9dbSNicholas Bellinger kfree(buf); 180c66ac9dbSNicholas Bellinger } 181c66ac9dbSNicholas Bellinger 182c66ac9dbSNicholas Bellinger static void 183c66ac9dbSNicholas Bellinger pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) 184c66ac9dbSNicholas Bellinger { 185c66ac9dbSNicholas Bellinger unsigned char *buf; 186c66ac9dbSNicholas Bellinger 187c66ac9dbSNicholas Bellinger if (sdev->inquiry_len < INQUIRY_LEN) 188c66ac9dbSNicholas Bellinger return; 189c66ac9dbSNicholas Bellinger 190c66ac9dbSNicholas Bellinger buf = sdev->inquiry; 191c66ac9dbSNicholas Bellinger if (!buf) 192c66ac9dbSNicholas Bellinger return; 193c66ac9dbSNicholas Bellinger /* 194c66ac9dbSNicholas Bellinger * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() 195c66ac9dbSNicholas Bellinger */ 196c66ac9dbSNicholas Bellinger memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); 197c66ac9dbSNicholas Bellinger memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); 198c66ac9dbSNicholas Bellinger memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); 199c66ac9dbSNicholas Bellinger } 200c66ac9dbSNicholas Bellinger 201c66ac9dbSNicholas Bellinger static int 202c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) 203c66ac9dbSNicholas Bellinger { 204c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 205c66ac9dbSNicholas Bellinger int ret; 206c66ac9dbSNicholas Bellinger 207c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 208c66ac9dbSNicholas Bellinger if (!buf) 209e3d6f909SAndy Grover return -ENOMEM; 210c66ac9dbSNicholas Bellinger 211c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 212c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 213c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 214c66ac9dbSNicholas Bellinger cdb[2] = 0x80; /* Unit Serial Number */ 215c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; 216c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); 217c66ac9dbSNicholas Bellinger 218c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 219c66ac9dbSNicholas Bellinger INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); 220c66ac9dbSNicholas Bellinger if (ret) 221c66ac9dbSNicholas Bellinger goto out_free; 222c66ac9dbSNicholas Bellinger 223c66ac9dbSNicholas Bellinger snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); 224c66ac9dbSNicholas Bellinger 2250fd97ccfSChristoph Hellwig wwn->t10_dev->dev_flags |= DF_FIRMWARE_VPD_UNIT_SERIAL; 226c66ac9dbSNicholas Bellinger 227c66ac9dbSNicholas Bellinger kfree(buf); 228c66ac9dbSNicholas Bellinger return 0; 229c66ac9dbSNicholas Bellinger 230c66ac9dbSNicholas Bellinger out_free: 231c66ac9dbSNicholas Bellinger kfree(buf); 232e3d6f909SAndy Grover return -EPERM; 233c66ac9dbSNicholas Bellinger } 234c66ac9dbSNicholas Bellinger 235c66ac9dbSNicholas Bellinger static void 236c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, 237c66ac9dbSNicholas Bellinger struct t10_wwn *wwn) 238c66ac9dbSNicholas Bellinger { 239c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; 240c66ac9dbSNicholas Bellinger int ident_len, page_len, off = 4, ret; 241c66ac9dbSNicholas Bellinger struct t10_vpd *vpd; 242c66ac9dbSNicholas Bellinger 243c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 244c66ac9dbSNicholas Bellinger if (!buf) 245c66ac9dbSNicholas Bellinger return; 246c66ac9dbSNicholas Bellinger 247c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 248c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 249c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 250c66ac9dbSNicholas Bellinger cdb[2] = 0x83; /* Device Identifier */ 251c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; 252c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); 253c66ac9dbSNicholas Bellinger 254c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 255c66ac9dbSNicholas Bellinger INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, 256c66ac9dbSNicholas Bellinger NULL, HZ, 1, NULL); 257c66ac9dbSNicholas Bellinger if (ret) 258c66ac9dbSNicholas Bellinger goto out; 259c66ac9dbSNicholas Bellinger 260c66ac9dbSNicholas Bellinger page_len = (buf[2] << 8) | buf[3]; 261c66ac9dbSNicholas Bellinger while (page_len > 0) { 262c66ac9dbSNicholas Bellinger /* Grab a pointer to the Identification descriptor */ 263c66ac9dbSNicholas Bellinger page_83 = &buf[off]; 264c66ac9dbSNicholas Bellinger ident_len = page_83[3]; 265c66ac9dbSNicholas Bellinger if (!ident_len) { 2666708bb27SAndy Grover pr_err("page_83[3]: identifier" 267c66ac9dbSNicholas Bellinger " length zero!\n"); 268c66ac9dbSNicholas Bellinger break; 269c66ac9dbSNicholas Bellinger } 27035d1efe8SMasanari Iida pr_debug("T10 VPD Identifier Length: %d\n", ident_len); 271c66ac9dbSNicholas Bellinger 272c66ac9dbSNicholas Bellinger vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); 273c66ac9dbSNicholas Bellinger if (!vpd) { 2746708bb27SAndy Grover pr_err("Unable to allocate memory for" 275c66ac9dbSNicholas Bellinger " struct t10_vpd\n"); 276c66ac9dbSNicholas Bellinger goto out; 277c66ac9dbSNicholas Bellinger } 278c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&vpd->vpd_list); 279c66ac9dbSNicholas Bellinger 280c66ac9dbSNicholas Bellinger transport_set_vpd_proto_id(vpd, page_83); 281c66ac9dbSNicholas Bellinger transport_set_vpd_assoc(vpd, page_83); 282c66ac9dbSNicholas Bellinger 283c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident_type(vpd, page_83) < 0) { 284c66ac9dbSNicholas Bellinger off += (ident_len + 4); 285c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 286c66ac9dbSNicholas Bellinger kfree(vpd); 287c66ac9dbSNicholas Bellinger continue; 288c66ac9dbSNicholas Bellinger } 289c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident(vpd, page_83) < 0) { 290c66ac9dbSNicholas Bellinger off += (ident_len + 4); 291c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 292c66ac9dbSNicholas Bellinger kfree(vpd); 293c66ac9dbSNicholas Bellinger continue; 294c66ac9dbSNicholas Bellinger } 295c66ac9dbSNicholas Bellinger 296c66ac9dbSNicholas Bellinger list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); 297c66ac9dbSNicholas Bellinger off += (ident_len + 4); 298c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 299c66ac9dbSNicholas Bellinger } 300c66ac9dbSNicholas Bellinger 301c66ac9dbSNicholas Bellinger out: 302c66ac9dbSNicholas Bellinger kfree(buf); 303c66ac9dbSNicholas Bellinger } 304c66ac9dbSNicholas Bellinger 3050fd97ccfSChristoph Hellwig static int pscsi_add_device_to_list(struct se_device *dev, 3060fd97ccfSChristoph Hellwig struct scsi_device *sd) 307c66ac9dbSNicholas Bellinger { 3080fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 3090fd97ccfSChristoph Hellwig struct request_queue *q = sd->request_queue; 310c66ac9dbSNicholas Bellinger 3110fd97ccfSChristoph Hellwig pdv->pdv_sd = sd; 312c66ac9dbSNicholas Bellinger 313c66ac9dbSNicholas Bellinger if (!sd->queue_depth) { 314c66ac9dbSNicholas Bellinger sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; 315c66ac9dbSNicholas Bellinger 3169cb78c16SHannes Reinecke pr_err("Set broken SCSI Device %d:%d:%llu" 317c66ac9dbSNicholas Bellinger " queue_depth to %d\n", sd->channel, sd->id, 318c66ac9dbSNicholas Bellinger sd->lun, sd->queue_depth); 319c66ac9dbSNicholas Bellinger } 3200fd97ccfSChristoph Hellwig 3210fd97ccfSChristoph Hellwig dev->dev_attrib.hw_block_size = sd->sector_size; 3220fd97ccfSChristoph Hellwig dev->dev_attrib.hw_max_sectors = 3230fd97ccfSChristoph Hellwig min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q)); 3240fd97ccfSChristoph Hellwig dev->dev_attrib.hw_queue_depth = sd->queue_depth; 3250fd97ccfSChristoph Hellwig 326c66ac9dbSNicholas Bellinger /* 327c66ac9dbSNicholas Bellinger * Setup our standard INQUIRY info into se_dev->t10_wwn 328c66ac9dbSNicholas Bellinger */ 3290fd97ccfSChristoph Hellwig pscsi_set_inquiry_info(sd, &dev->t10_wwn); 330c66ac9dbSNicholas Bellinger 331c66ac9dbSNicholas Bellinger /* 332c66ac9dbSNicholas Bellinger * Locate VPD WWN Information used for various purposes within 333c66ac9dbSNicholas Bellinger * the Storage Engine. 334c66ac9dbSNicholas Bellinger */ 3350fd97ccfSChristoph Hellwig if (!pscsi_get_inquiry_vpd_serial(sd, &dev->t10_wwn)) { 336c66ac9dbSNicholas Bellinger /* 337c66ac9dbSNicholas Bellinger * If VPD Unit Serial returned GOOD status, try 338c66ac9dbSNicholas Bellinger * VPD Device Identification page (0x83). 339c66ac9dbSNicholas Bellinger */ 3400fd97ccfSChristoph Hellwig pscsi_get_inquiry_vpd_device_ident(sd, &dev->t10_wwn); 341c66ac9dbSNicholas Bellinger } 342c66ac9dbSNicholas Bellinger 343c66ac9dbSNicholas Bellinger /* 344c66ac9dbSNicholas Bellinger * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. 345c66ac9dbSNicholas Bellinger */ 346c66ac9dbSNicholas Bellinger if (sd->type == TYPE_TAPE) 347c66ac9dbSNicholas Bellinger pscsi_tape_read_blocksize(dev, sd); 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 */ 4130fd97ccfSChristoph Hellwig static int pscsi_create_type_rom(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 440c66ac9dbSNicholas Bellinger /* 441c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 442c66ac9dbSNicholas Bellinger */ 4430fd97ccfSChristoph Hellwig static int pscsi_create_type_other(struct se_device *dev, 4440fd97ccfSChristoph Hellwig struct scsi_device *sd) 4455dd7ed2eSDan Carpenter __releases(sh->host_lock) 446c66ac9dbSNicholas Bellinger { 4470fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 448c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 4490fd97ccfSChristoph Hellwig int ret; 450c66ac9dbSNicholas Bellinger 451c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 4520fd97ccfSChristoph Hellwig ret = pscsi_add_device_to_list(dev, sd); 4530fd97ccfSChristoph Hellwig if (ret) 4540fd97ccfSChristoph Hellwig return ret; 455c66ac9dbSNicholas Bellinger 4569cb78c16SHannes Reinecke pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n", 457c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 458c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 4590fd97ccfSChristoph Hellwig return 0; 460c66ac9dbSNicholas Bellinger } 461c66ac9dbSNicholas Bellinger 462ecf0dd66SFengguang Wu static int pscsi_configure_device(struct se_device *dev) 463c66ac9dbSNicholas Bellinger { 4640fd97ccfSChristoph Hellwig struct se_hba *hba = dev->se_hba; 4650fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 466c66ac9dbSNicholas Bellinger struct scsi_device *sd; 4670fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 468c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 469c66ac9dbSNicholas Bellinger int legacy_mode_enable = 0; 4700fd97ccfSChristoph Hellwig int ret; 471c66ac9dbSNicholas Bellinger 4720fd97ccfSChristoph Hellwig if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || 4730fd97ccfSChristoph Hellwig !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || 4740fd97ccfSChristoph Hellwig !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { 4750fd97ccfSChristoph Hellwig pr_err("Missing scsi_channel_id=, scsi_target_id= and" 4760fd97ccfSChristoph Hellwig " scsi_lun_id= parameters\n"); 4770fd97ccfSChristoph Hellwig return -EINVAL; 478c66ac9dbSNicholas Bellinger } 4790fd97ccfSChristoph Hellwig 480c66ac9dbSNicholas Bellinger /* 481c66ac9dbSNicholas Bellinger * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the 482c66ac9dbSNicholas Bellinger * struct Scsi_Host we will need to bring the TCM/pSCSI object online 483c66ac9dbSNicholas Bellinger */ 4846708bb27SAndy Grover if (!sh) { 485c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 4866708bb27SAndy Grover pr_err("pSCSI: Unable to locate struct" 487c66ac9dbSNicholas Bellinger " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); 4880fd97ccfSChristoph Hellwig return -ENODEV; 489c66ac9dbSNicholas Bellinger } 490c66ac9dbSNicholas Bellinger /* 491e6a8a41aSStefan Hajnoczi * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device 492c66ac9dbSNicholas Bellinger * reference, we enforce that udev_path has been set 493c66ac9dbSNicholas Bellinger */ 4940fd97ccfSChristoph Hellwig if (!(dev->dev_flags & DF_USING_UDEV_PATH)) { 4956708bb27SAndy Grover pr_err("pSCSI: udev_path attribute has not" 496c66ac9dbSNicholas Bellinger " been set before ENABLE=1\n"); 4970fd97ccfSChristoph Hellwig return -EINVAL; 498c66ac9dbSNicholas Bellinger } 499c66ac9dbSNicholas Bellinger /* 500e6a8a41aSStefan Hajnoczi * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID, 501c66ac9dbSNicholas Bellinger * use the original TCM hba ID to reference Linux/SCSI Host No 502c66ac9dbSNicholas Bellinger * and enable for PHV_LLD_SCSI_HOST_NO mode. 503c66ac9dbSNicholas Bellinger */ 504c66ac9dbSNicholas Bellinger if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { 5050fd97ccfSChristoph Hellwig if (hba->dev_count) { 5066708bb27SAndy Grover pr_err("pSCSI: Unable to set hba_mode" 507c66ac9dbSNicholas Bellinger " with active devices\n"); 5080fd97ccfSChristoph Hellwig return -EEXIST; 509c66ac9dbSNicholas Bellinger } 510c66ac9dbSNicholas Bellinger 511c66ac9dbSNicholas Bellinger if (pscsi_pmode_enable_hba(hba, 1) != 1) 5120fd97ccfSChristoph Hellwig return -ENODEV; 513c66ac9dbSNicholas Bellinger 514c66ac9dbSNicholas Bellinger legacy_mode_enable = 1; 515c66ac9dbSNicholas Bellinger hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 516c66ac9dbSNicholas Bellinger sh = phv->phv_lld_host; 517c66ac9dbSNicholas Bellinger } else { 518e3d6f909SAndy Grover sh = scsi_host_lookup(pdv->pdv_host_id); 51958932e96SWei Yongjun if (!sh) { 5206708bb27SAndy Grover pr_err("pSCSI: Unable to locate" 521c66ac9dbSNicholas Bellinger " pdv_host_id: %d\n", pdv->pdv_host_id); 52258932e96SWei Yongjun return -EINVAL; 523c66ac9dbSNicholas Bellinger } 524c66ac9dbSNicholas Bellinger } 525c66ac9dbSNicholas Bellinger } else { 526e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) { 527e6a8a41aSStefan Hajnoczi pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while" 528c66ac9dbSNicholas Bellinger " struct Scsi_Host exists\n"); 5290fd97ccfSChristoph Hellwig return -EEXIST; 530c66ac9dbSNicholas Bellinger } 531c66ac9dbSNicholas Bellinger } 532c66ac9dbSNicholas Bellinger 533c66ac9dbSNicholas Bellinger spin_lock_irq(sh->host_lock); 534c66ac9dbSNicholas Bellinger list_for_each_entry(sd, &sh->__devices, siblings) { 535c66ac9dbSNicholas Bellinger if ((pdv->pdv_channel_id != sd->channel) || 536c66ac9dbSNicholas Bellinger (pdv->pdv_target_id != sd->id) || 537c66ac9dbSNicholas Bellinger (pdv->pdv_lun_id != sd->lun)) 538c66ac9dbSNicholas Bellinger continue; 539c66ac9dbSNicholas Bellinger /* 540c66ac9dbSNicholas Bellinger * Functions will release the held struct scsi_host->host_lock 541c66ac9dbSNicholas Bellinger * before calling calling pscsi_add_device_to_list() to register 542c66ac9dbSNicholas Bellinger * struct scsi_device with target_core_mod. 543c66ac9dbSNicholas Bellinger */ 544c66ac9dbSNicholas Bellinger switch (sd->type) { 545c66ac9dbSNicholas Bellinger case TYPE_DISK: 5460fd97ccfSChristoph Hellwig ret = pscsi_create_type_disk(dev, sd); 547c66ac9dbSNicholas Bellinger break; 548c66ac9dbSNicholas Bellinger case TYPE_ROM: 5490fd97ccfSChristoph Hellwig ret = pscsi_create_type_rom(dev, sd); 550c66ac9dbSNicholas Bellinger break; 551c66ac9dbSNicholas Bellinger default: 5520fd97ccfSChristoph Hellwig ret = pscsi_create_type_other(dev, sd); 553c66ac9dbSNicholas Bellinger break; 554c66ac9dbSNicholas Bellinger } 555c66ac9dbSNicholas Bellinger 5560fd97ccfSChristoph Hellwig if (ret) { 557e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 558c66ac9dbSNicholas Bellinger scsi_host_put(sh); 559c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 560c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 561c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 562c66ac9dbSNicholas Bellinger } 563c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 5640fd97ccfSChristoph Hellwig return ret; 565c66ac9dbSNicholas Bellinger } 5660fd97ccfSChristoph Hellwig return 0; 567c66ac9dbSNicholas Bellinger } 568c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 569c66ac9dbSNicholas Bellinger 5706708bb27SAndy Grover pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, 571c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); 572c66ac9dbSNicholas Bellinger 573e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 574c66ac9dbSNicholas Bellinger scsi_host_put(sh); 575c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 576c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 577c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 578c66ac9dbSNicholas Bellinger } 579c66ac9dbSNicholas Bellinger 5800fd97ccfSChristoph Hellwig return -ENODEV; 581c66ac9dbSNicholas Bellinger } 582c66ac9dbSNicholas Bellinger 5830fd97ccfSChristoph Hellwig static void pscsi_free_device(struct se_device *dev) 584c66ac9dbSNicholas Bellinger { 5850fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 5860fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 587c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 588c66ac9dbSNicholas Bellinger 589c66ac9dbSNicholas Bellinger if (sd) { 590c66ac9dbSNicholas Bellinger /* 591c66ac9dbSNicholas Bellinger * Release exclusive pSCSI internal struct block_device claim for 592c66ac9dbSNicholas Bellinger * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() 593c66ac9dbSNicholas Bellinger */ 594c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { 595c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, 596c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL); 597c66ac9dbSNicholas Bellinger pdv->pdv_bd = NULL; 598c66ac9dbSNicholas Bellinger } 599c66ac9dbSNicholas Bellinger /* 600c66ac9dbSNicholas Bellinger * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference 601c66ac9dbSNicholas Bellinger * to struct Scsi_Host now. 602c66ac9dbSNicholas Bellinger */ 603c66ac9dbSNicholas Bellinger if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && 604c66ac9dbSNicholas Bellinger (phv->phv_lld_host != NULL)) 605c66ac9dbSNicholas Bellinger scsi_host_put(phv->phv_lld_host); 606c66ac9dbSNicholas Bellinger 607c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) 608c66ac9dbSNicholas Bellinger scsi_device_put(sd); 609c66ac9dbSNicholas Bellinger 610c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 611c66ac9dbSNicholas Bellinger } 612c66ac9dbSNicholas Bellinger 613c66ac9dbSNicholas Bellinger kfree(pdv); 614c66ac9dbSNicholas Bellinger } 615c66ac9dbSNicholas Bellinger 616d5829eacSPaolo Bonzini static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg, 617d5829eacSPaolo Bonzini unsigned char *sense_buffer) 618c66ac9dbSNicholas Bellinger { 6190fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); 620c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 621c66ac9dbSNicholas Bellinger int result; 6225787cacdSChristoph Hellwig struct pscsi_plugin_task *pt = cmd->priv; 6231d2a2cd9SNicholas Bellinger unsigned char *cdb; 6241d2a2cd9SNicholas Bellinger /* 6251d2a2cd9SNicholas Bellinger * Special case for REPORT_LUNs handling where pscsi_plugin_task has 6261d2a2cd9SNicholas Bellinger * not been allocated because TCM is handling the emulation directly. 6271d2a2cd9SNicholas Bellinger */ 6281d2a2cd9SNicholas Bellinger if (!pt) 629d5829eacSPaolo Bonzini return; 630c66ac9dbSNicholas Bellinger 6311d2a2cd9SNicholas Bellinger cdb = &pt->pscsi_cdb[0]; 632c66ac9dbSNicholas Bellinger result = pt->pscsi_result; 633c66ac9dbSNicholas Bellinger /* 634c66ac9dbSNicholas Bellinger * Hack to make sure that Write-Protect modepage is set if R/O mode is 635c66ac9dbSNicholas Bellinger * forced. 636c66ac9dbSNicholas Bellinger */ 637306c11b2SPaolo Bonzini if (!cmd->se_deve || !cmd->data_length) 638c66ac9dbSNicholas Bellinger goto after_mode_sense; 639c66ac9dbSNicholas Bellinger 640306c11b2SPaolo Bonzini if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && 641306c11b2SPaolo Bonzini (status_byte(result) << 1) == SAM_STAT_GOOD) { 6425787cacdSChristoph Hellwig if (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) { 643de103c93SChristoph Hellwig unsigned char *buf; 644de103c93SChristoph Hellwig 645de103c93SChristoph Hellwig buf = transport_kmap_data_sg(cmd); 646de103c93SChristoph Hellwig if (!buf) 647de103c93SChristoph Hellwig ; /* XXX: TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE */ 648c66ac9dbSNicholas Bellinger 649c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SENSE_10) { 650c66ac9dbSNicholas Bellinger if (!(buf[3] & 0x80)) 651c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 652c66ac9dbSNicholas Bellinger } else { 653c66ac9dbSNicholas Bellinger if (!(buf[2] & 0x80)) 654c66ac9dbSNicholas Bellinger buf[2] |= 0x80; 655c66ac9dbSNicholas Bellinger } 65605d1c7c0SAndy Grover 6575787cacdSChristoph Hellwig transport_kunmap_data_sg(cmd); 658c66ac9dbSNicholas Bellinger } 659c66ac9dbSNicholas Bellinger } 660c66ac9dbSNicholas Bellinger after_mode_sense: 661c66ac9dbSNicholas Bellinger 662306c11b2SPaolo Bonzini if (sd->type != TYPE_TAPE || !cmd->data_length) 663c66ac9dbSNicholas Bellinger goto after_mode_select; 664c66ac9dbSNicholas Bellinger 665c66ac9dbSNicholas Bellinger /* 666c66ac9dbSNicholas Bellinger * Hack to correctly obtain the initiator requested blocksize for 667c66ac9dbSNicholas Bellinger * TYPE_TAPE. Since this value is dependent upon each tape media, 668c66ac9dbSNicholas Bellinger * struct scsi_device->sector_size will not contain the correct value 669c66ac9dbSNicholas Bellinger * by default, so we go ahead and set it so 670c66ac9dbSNicholas Bellinger * TRANSPORT(dev)->get_blockdev() returns the correct value to the 671c66ac9dbSNicholas Bellinger * storage engine. 672c66ac9dbSNicholas Bellinger */ 673c66ac9dbSNicholas Bellinger if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && 674c66ac9dbSNicholas Bellinger (status_byte(result) << 1) == SAM_STAT_GOOD) { 675c66ac9dbSNicholas Bellinger unsigned char *buf; 676c66ac9dbSNicholas Bellinger u16 bdl; 677c66ac9dbSNicholas Bellinger u32 blocksize; 678c66ac9dbSNicholas Bellinger 679c66ac9dbSNicholas Bellinger buf = sg_virt(&sg[0]); 6806708bb27SAndy Grover if (!buf) { 6816708bb27SAndy Grover pr_err("Unable to get buf for scatterlist\n"); 682c66ac9dbSNicholas Bellinger goto after_mode_select; 683c66ac9dbSNicholas Bellinger } 684c66ac9dbSNicholas Bellinger 685c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 686c66ac9dbSNicholas Bellinger bdl = (buf[3]); 687c66ac9dbSNicholas Bellinger else 688c66ac9dbSNicholas Bellinger bdl = (buf[6] << 8) | (buf[7]); 689c66ac9dbSNicholas Bellinger 690c66ac9dbSNicholas Bellinger if (!bdl) 691c66ac9dbSNicholas Bellinger goto after_mode_select; 692c66ac9dbSNicholas Bellinger 693c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 694c66ac9dbSNicholas Bellinger blocksize = (buf[9] << 16) | (buf[10] << 8) | 695c66ac9dbSNicholas Bellinger (buf[11]); 696c66ac9dbSNicholas Bellinger else 697c66ac9dbSNicholas Bellinger blocksize = (buf[13] << 16) | (buf[14] << 8) | 698c66ac9dbSNicholas Bellinger (buf[15]); 699c66ac9dbSNicholas Bellinger 700c66ac9dbSNicholas Bellinger sd->sector_size = blocksize; 701c66ac9dbSNicholas Bellinger } 702c66ac9dbSNicholas Bellinger after_mode_select: 703c66ac9dbSNicholas Bellinger 704d5829eacSPaolo Bonzini if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) { 705d5829eacSPaolo Bonzini memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER); 706d5829eacSPaolo Bonzini cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; 707d5829eacSPaolo Bonzini } 708c66ac9dbSNicholas Bellinger } 709c66ac9dbSNicholas Bellinger 710c66ac9dbSNicholas Bellinger enum { 711c66ac9dbSNicholas Bellinger Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, 712c66ac9dbSNicholas Bellinger Opt_scsi_lun_id, Opt_err 713c66ac9dbSNicholas Bellinger }; 714c66ac9dbSNicholas Bellinger 715c66ac9dbSNicholas Bellinger static match_table_t tokens = { 716c66ac9dbSNicholas Bellinger {Opt_scsi_host_id, "scsi_host_id=%d"}, 717c66ac9dbSNicholas Bellinger {Opt_scsi_channel_id, "scsi_channel_id=%d"}, 718c66ac9dbSNicholas Bellinger {Opt_scsi_target_id, "scsi_target_id=%d"}, 719c66ac9dbSNicholas Bellinger {Opt_scsi_lun_id, "scsi_lun_id=%d"}, 720c66ac9dbSNicholas Bellinger {Opt_err, NULL} 721c66ac9dbSNicholas Bellinger }; 722c66ac9dbSNicholas Bellinger 7230fd97ccfSChristoph Hellwig static ssize_t pscsi_set_configfs_dev_params(struct se_device *dev, 7240fd97ccfSChristoph Hellwig const char *page, ssize_t count) 725c66ac9dbSNicholas Bellinger { 7260fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 7270fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 728c66ac9dbSNicholas Bellinger char *orig, *ptr, *opts; 729c66ac9dbSNicholas Bellinger substring_t args[MAX_OPT_ARGS]; 730c66ac9dbSNicholas Bellinger int ret = 0, arg, token; 731c66ac9dbSNicholas Bellinger 732c66ac9dbSNicholas Bellinger opts = kstrdup(page, GFP_KERNEL); 733c66ac9dbSNicholas Bellinger if (!opts) 734c66ac9dbSNicholas Bellinger return -ENOMEM; 735c66ac9dbSNicholas Bellinger 736c66ac9dbSNicholas Bellinger orig = opts; 737c66ac9dbSNicholas Bellinger 73890c161b6SSebastian Andrzej Siewior while ((ptr = strsep(&opts, ",\n")) != NULL) { 739c66ac9dbSNicholas Bellinger if (!*ptr) 740c66ac9dbSNicholas Bellinger continue; 741c66ac9dbSNicholas Bellinger 742c66ac9dbSNicholas Bellinger token = match_token(ptr, tokens, args); 743c66ac9dbSNicholas Bellinger switch (token) { 744c66ac9dbSNicholas Bellinger case Opt_scsi_host_id: 745c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 7466708bb27SAndy Grover pr_err("PSCSI[%d]: Unable to accept" 747c66ac9dbSNicholas Bellinger " scsi_host_id while phv_mode ==" 748c66ac9dbSNicholas Bellinger " PHV_LLD_SCSI_HOST_NO\n", 749c66ac9dbSNicholas Bellinger phv->phv_host_id); 750c66ac9dbSNicholas Bellinger ret = -EINVAL; 751c66ac9dbSNicholas Bellinger goto out; 752c66ac9dbSNicholas Bellinger } 753ce31c1b0SJoern Engel ret = match_int(args, &arg); 754ce31c1b0SJoern Engel if (ret) 755ce31c1b0SJoern Engel goto out; 756c66ac9dbSNicholas Bellinger pdv->pdv_host_id = arg; 7576708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Host ID:" 758c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_host_id); 759c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; 760c66ac9dbSNicholas Bellinger break; 761c66ac9dbSNicholas Bellinger case Opt_scsi_channel_id: 762ce31c1b0SJoern Engel ret = match_int(args, &arg); 763ce31c1b0SJoern Engel if (ret) 764ce31c1b0SJoern Engel goto out; 765c66ac9dbSNicholas Bellinger pdv->pdv_channel_id = arg; 7666708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Channel" 767c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 768c66ac9dbSNicholas Bellinger pdv->pdv_channel_id); 769c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; 770c66ac9dbSNicholas Bellinger break; 771c66ac9dbSNicholas Bellinger case Opt_scsi_target_id: 772ce31c1b0SJoern Engel ret = match_int(args, &arg); 773ce31c1b0SJoern Engel if (ret) 774ce31c1b0SJoern Engel goto out; 775c66ac9dbSNicholas Bellinger pdv->pdv_target_id = arg; 7766708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Target" 777c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 778c66ac9dbSNicholas Bellinger pdv->pdv_target_id); 779c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_TARGET_ID; 780c66ac9dbSNicholas Bellinger break; 781c66ac9dbSNicholas Bellinger case Opt_scsi_lun_id: 782ce31c1b0SJoern Engel ret = match_int(args, &arg); 783ce31c1b0SJoern Engel if (ret) 784ce31c1b0SJoern Engel goto out; 785c66ac9dbSNicholas Bellinger pdv->pdv_lun_id = arg; 7866708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:" 787c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_lun_id); 788c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_LUN_ID; 789c66ac9dbSNicholas Bellinger break; 790c66ac9dbSNicholas Bellinger default: 791c66ac9dbSNicholas Bellinger break; 792c66ac9dbSNicholas Bellinger } 793c66ac9dbSNicholas Bellinger } 794c66ac9dbSNicholas Bellinger 795c66ac9dbSNicholas Bellinger out: 796c66ac9dbSNicholas Bellinger kfree(orig); 797c66ac9dbSNicholas Bellinger return (!ret) ? count : ret; 798c66ac9dbSNicholas Bellinger } 799c66ac9dbSNicholas Bellinger 8000fd97ccfSChristoph Hellwig static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b) 801c66ac9dbSNicholas Bellinger { 8020fd97ccfSChristoph Hellwig struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; 8030fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 804c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 805c66ac9dbSNicholas Bellinger unsigned char host_id[16]; 806c66ac9dbSNicholas Bellinger ssize_t bl; 807c66ac9dbSNicholas Bellinger int i; 808c66ac9dbSNicholas Bellinger 809e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 810c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "%d", pdv->pdv_host_id); 811c66ac9dbSNicholas Bellinger else 812c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "PHBA Mode"); 813c66ac9dbSNicholas Bellinger 814c66ac9dbSNicholas Bellinger bl = sprintf(b, "SCSI Device Bus Location:" 815c66ac9dbSNicholas Bellinger " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", 816c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, 817c66ac9dbSNicholas Bellinger host_id); 818c66ac9dbSNicholas Bellinger 819c66ac9dbSNicholas Bellinger if (sd) { 820c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 821c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "Vendor: "); 822c66ac9dbSNicholas Bellinger for (i = 0; i < 8; i++) { 823c66ac9dbSNicholas Bellinger if (ISPRINT(sd->vendor[i])) /* printable character? */ 824c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->vendor[i]); 825c66ac9dbSNicholas Bellinger else 826c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 827c66ac9dbSNicholas Bellinger } 828c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Model: "); 829c66ac9dbSNicholas Bellinger for (i = 0; i < 16; i++) { 830c66ac9dbSNicholas Bellinger if (ISPRINT(sd->model[i])) /* printable character ? */ 831c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->model[i]); 832c66ac9dbSNicholas Bellinger else 833c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 834c66ac9dbSNicholas Bellinger } 835c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Rev: "); 836c66ac9dbSNicholas Bellinger for (i = 0; i < 4; i++) { 837c66ac9dbSNicholas Bellinger if (ISPRINT(sd->rev[i])) /* printable character ? */ 838c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->rev[i]); 839c66ac9dbSNicholas Bellinger else 840c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 841c66ac9dbSNicholas Bellinger } 842c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "\n"); 843c66ac9dbSNicholas Bellinger } 844c66ac9dbSNicholas Bellinger return bl; 845c66ac9dbSNicholas Bellinger } 846c66ac9dbSNicholas Bellinger 847c66ac9dbSNicholas Bellinger static void pscsi_bi_endio(struct bio *bio, int error) 848c66ac9dbSNicholas Bellinger { 849c66ac9dbSNicholas Bellinger bio_put(bio); 850c66ac9dbSNicholas Bellinger } 851c66ac9dbSNicholas Bellinger 8522dbe10a2SAsias He static inline struct bio *pscsi_get_bio(int nr_vecs) 853c66ac9dbSNicholas Bellinger { 854c66ac9dbSNicholas Bellinger struct bio *bio; 855c66ac9dbSNicholas Bellinger /* 856c66ac9dbSNicholas Bellinger * Use bio_malloc() following the comment in for bio -> struct request 857c66ac9dbSNicholas Bellinger * in block/blk-core.c:blk_make_request() 858c66ac9dbSNicholas Bellinger */ 8592dbe10a2SAsias He bio = bio_kmalloc(GFP_KERNEL, nr_vecs); 8606708bb27SAndy Grover if (!bio) { 8616708bb27SAndy Grover pr_err("PSCSI: bio_kmalloc() failed\n"); 862c66ac9dbSNicholas Bellinger return NULL; 863c66ac9dbSNicholas Bellinger } 864c66ac9dbSNicholas Bellinger bio->bi_end_io = pscsi_bi_endio; 865c66ac9dbSNicholas Bellinger 866c66ac9dbSNicholas Bellinger return bio; 867c66ac9dbSNicholas Bellinger } 868c66ac9dbSNicholas Bellinger 869de103c93SChristoph Hellwig static sense_reason_t 870de103c93SChristoph Hellwig pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, 871de103c93SChristoph Hellwig enum dma_data_direction data_direction, struct bio **hbio) 872c66ac9dbSNicholas Bellinger { 8730fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); 87402b1a746SChristoph Hellwig struct bio *bio = NULL, *tbio = NULL; 875c66ac9dbSNicholas Bellinger struct page *page; 876c66ac9dbSNicholas Bellinger struct scatterlist *sg; 8777a83aa4eSChristoph Hellwig u32 data_len = cmd->data_length, i, len, bytes, off; 8785787cacdSChristoph Hellwig int nr_pages = (cmd->data_length + sgl[0].offset + 879c66ac9dbSNicholas Bellinger PAGE_SIZE - 1) >> PAGE_SHIFT; 88003e98c9eSNicholas Bellinger int nr_vecs = 0, rc; 8815787cacdSChristoph Hellwig int rw = (data_direction == DMA_TO_DEVICE); 882c66ac9dbSNicholas Bellinger 88302b1a746SChristoph Hellwig *hbio = NULL; 88402b1a746SChristoph Hellwig 8856708bb27SAndy Grover pr_debug("PSCSI: nr_pages: %d\n", nr_pages); 886c66ac9dbSNicholas Bellinger 8875787cacdSChristoph Hellwig for_each_sg(sgl, sg, sgl_nents, i) { 888c66ac9dbSNicholas Bellinger page = sg_page(sg); 889c66ac9dbSNicholas Bellinger off = sg->offset; 890c66ac9dbSNicholas Bellinger len = sg->length; 891c66ac9dbSNicholas Bellinger 8926708bb27SAndy Grover pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i, 893c66ac9dbSNicholas Bellinger page, len, off); 894c66ac9dbSNicholas Bellinger 8958f27d487SAsias He /* 8968f27d487SAsias He * We only have one page of data in each sg element, 8978f27d487SAsias He * we can not cross a page boundary. 8988f27d487SAsias He */ 8998f27d487SAsias He if (off + len > PAGE_SIZE) 9008f27d487SAsias He goto fail; 9018f27d487SAsias He 9028f27d487SAsias He if (len > 0 && data_len > 0) { 903c66ac9dbSNicholas Bellinger bytes = min_t(unsigned int, len, PAGE_SIZE - off); 904c66ac9dbSNicholas Bellinger bytes = min(bytes, data_len); 905c66ac9dbSNicholas Bellinger 9066708bb27SAndy Grover if (!bio) { 907c66ac9dbSNicholas Bellinger nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); 908c66ac9dbSNicholas Bellinger nr_pages -= nr_vecs; 909c66ac9dbSNicholas Bellinger /* 910c66ac9dbSNicholas Bellinger * Calls bio_kmalloc() and sets bio->bi_end_io() 911c66ac9dbSNicholas Bellinger */ 912a1d8b49aSAndy Grover bio = pscsi_get_bio(nr_vecs); 9136708bb27SAndy Grover if (!bio) 914c66ac9dbSNicholas Bellinger goto fail; 915c66ac9dbSNicholas Bellinger 916c66ac9dbSNicholas Bellinger if (rw) 917c66ac9dbSNicholas Bellinger bio->bi_rw |= REQ_WRITE; 918c66ac9dbSNicholas Bellinger 9196708bb27SAndy Grover pr_debug("PSCSI: Allocated bio: %p," 920c66ac9dbSNicholas Bellinger " dir: %s nr_vecs: %d\n", bio, 921c66ac9dbSNicholas Bellinger (rw) ? "rw" : "r", nr_vecs); 922c66ac9dbSNicholas Bellinger /* 923c66ac9dbSNicholas Bellinger * Set *hbio pointer to handle the case: 924c66ac9dbSNicholas Bellinger * nr_pages > BIO_MAX_PAGES, where additional 925c66ac9dbSNicholas Bellinger * bios need to be added to complete a given 9265787cacdSChristoph Hellwig * command. 927c66ac9dbSNicholas Bellinger */ 92802b1a746SChristoph Hellwig if (!*hbio) 92902b1a746SChristoph Hellwig *hbio = tbio = bio; 930c66ac9dbSNicholas Bellinger else 931c66ac9dbSNicholas Bellinger tbio = tbio->bi_next = bio; 932c66ac9dbSNicholas Bellinger } 933c66ac9dbSNicholas Bellinger 9346708bb27SAndy Grover pr_debug("PSCSI: Calling bio_add_pc_page() i: %d" 935c66ac9dbSNicholas Bellinger " bio: %p page: %p len: %d off: %d\n", i, bio, 936c66ac9dbSNicholas Bellinger page, len, off); 937c66ac9dbSNicholas Bellinger 938c66ac9dbSNicholas Bellinger rc = bio_add_pc_page(pdv->pdv_sd->request_queue, 939c66ac9dbSNicholas Bellinger bio, page, bytes, off); 940c66ac9dbSNicholas Bellinger if (rc != bytes) 941c66ac9dbSNicholas Bellinger goto fail; 942c66ac9dbSNicholas Bellinger 9436708bb27SAndy Grover pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", 944c66ac9dbSNicholas Bellinger bio->bi_vcnt, nr_vecs); 945c66ac9dbSNicholas Bellinger 946c66ac9dbSNicholas Bellinger if (bio->bi_vcnt > nr_vecs) { 9476708bb27SAndy Grover pr_debug("PSCSI: Reached bio->bi_vcnt max:" 948c66ac9dbSNicholas Bellinger " %d i: %d bio: %p, allocating another" 949c66ac9dbSNicholas Bellinger " bio\n", bio->bi_vcnt, i, bio); 950c66ac9dbSNicholas Bellinger /* 951c66ac9dbSNicholas Bellinger * Clear the pointer so that another bio will 952c66ac9dbSNicholas Bellinger * be allocated with pscsi_get_bio() above, the 953c66ac9dbSNicholas Bellinger * current bio has already been set *tbio and 954c66ac9dbSNicholas Bellinger * bio->bi_next. 955c66ac9dbSNicholas Bellinger */ 956c66ac9dbSNicholas Bellinger bio = NULL; 957c66ac9dbSNicholas Bellinger } 958c66ac9dbSNicholas Bellinger 959c66ac9dbSNicholas Bellinger data_len -= bytes; 960c66ac9dbSNicholas Bellinger } 961c66ac9dbSNicholas Bellinger } 962c66ac9dbSNicholas Bellinger 963de103c93SChristoph Hellwig return 0; 964c66ac9dbSNicholas Bellinger fail: 96502b1a746SChristoph Hellwig while (*hbio) { 96602b1a746SChristoph Hellwig bio = *hbio; 96702b1a746SChristoph Hellwig *hbio = (*hbio)->bi_next; 96802b1a746SChristoph Hellwig bio_endio(bio, 0); /* XXX: should be error */ 969c66ac9dbSNicholas Bellinger } 970de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 971c66ac9dbSNicholas Bellinger } 972c66ac9dbSNicholas Bellinger 9733d6d7201SChristoph Hellwig /* 9743d6d7201SChristoph Hellwig * Clear a lun set in the cdb if the initiator talking to use spoke 9753d6d7201SChristoph Hellwig * and old standards version, as we can't assume the underlying device 9763d6d7201SChristoph Hellwig * won't choke up on it. 9773d6d7201SChristoph Hellwig */ 9783d6d7201SChristoph Hellwig static inline void pscsi_clear_cdb_lun(unsigned char *cdb) 9793d6d7201SChristoph Hellwig { 9803d6d7201SChristoph Hellwig switch (cdb[0]) { 9813d6d7201SChristoph Hellwig case READ_10: /* SBC - RDProtect */ 9823d6d7201SChristoph Hellwig case READ_12: /* SBC - RDProtect */ 9833d6d7201SChristoph Hellwig case READ_16: /* SBC - RDProtect */ 9843d6d7201SChristoph Hellwig case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ 9853d6d7201SChristoph Hellwig case VERIFY: /* SBC - VRProtect */ 9863d6d7201SChristoph Hellwig case VERIFY_16: /* SBC - VRProtect */ 9873d6d7201SChristoph Hellwig case WRITE_VERIFY: /* SBC - VRProtect */ 9883d6d7201SChristoph Hellwig case WRITE_VERIFY_12: /* SBC - VRProtect */ 9893d6d7201SChristoph Hellwig case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */ 9903d6d7201SChristoph Hellwig break; 9913d6d7201SChristoph Hellwig default: 9923d6d7201SChristoph Hellwig cdb[1] &= 0x1f; /* clear logical unit number */ 9933d6d7201SChristoph Hellwig break; 9943d6d7201SChristoph Hellwig } 9953d6d7201SChristoph Hellwig } 9963d6d7201SChristoph Hellwig 997de103c93SChristoph Hellwig static sense_reason_t 998de103c93SChristoph Hellwig pscsi_parse_cdb(struct se_cmd *cmd) 999d6e0175cSChristoph Hellwig { 1000d6e0175cSChristoph Hellwig unsigned char *cdb = cmd->t_task_cdb; 1001d6e0175cSChristoph Hellwig 1002de103c93SChristoph Hellwig if (cmd->se_cmd_flags & SCF_BIDI) 1003de103c93SChristoph Hellwig return TCM_UNSUPPORTED_SCSI_OPCODE; 1004d6e0175cSChristoph Hellwig 10053d6d7201SChristoph Hellwig pscsi_clear_cdb_lun(cdb); 10063d6d7201SChristoph Hellwig 10071fd032eeSChristoph Hellwig /* 1008a3785c87SNicholas Bellinger * For REPORT LUNS we always need to emulate the response, for everything 1009a3785c87SNicholas Bellinger * else the default for pSCSI is to pass the command to the underlying 1010a3785c87SNicholas Bellinger * LLD / physical hardware. 10111fd032eeSChristoph Hellwig */ 10121fd032eeSChristoph Hellwig switch (cdb[0]) { 10131fd032eeSChristoph Hellwig case REPORT_LUNS: 1014e6c4219bSChristoph Hellwig cmd->execute_cmd = spc_emulate_report_luns; 1015e6c4219bSChristoph Hellwig return 0; 10161fd032eeSChristoph Hellwig case READ_6: 10171fd032eeSChristoph Hellwig case READ_10: 10181fd032eeSChristoph Hellwig case READ_12: 10191fd032eeSChristoph Hellwig case READ_16: 10201fd032eeSChristoph Hellwig case WRITE_6: 10211fd032eeSChristoph Hellwig case WRITE_10: 10221fd032eeSChristoph Hellwig case WRITE_12: 10231fd032eeSChristoph Hellwig case WRITE_16: 10241fd032eeSChristoph Hellwig case WRITE_VERIFY: 10251fd032eeSChristoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 10260c2ad7d1SChristoph Hellwig /* FALLTHROUGH*/ 10271fd032eeSChristoph Hellwig default: 10280c2ad7d1SChristoph Hellwig cmd->execute_cmd = pscsi_execute_cmd; 10291fd032eeSChristoph Hellwig return 0; 10301fd032eeSChristoph Hellwig } 10318de530a5SChristoph Hellwig } 1032d6e0175cSChristoph Hellwig 1033de103c93SChristoph Hellwig static sense_reason_t 1034de103c93SChristoph Hellwig pscsi_execute_cmd(struct se_cmd *cmd) 1035c66ac9dbSNicholas Bellinger { 10360c2ad7d1SChristoph Hellwig struct scatterlist *sgl = cmd->t_data_sg; 10370c2ad7d1SChristoph Hellwig u32 sgl_nents = cmd->t_data_nents; 10380c2ad7d1SChristoph Hellwig enum dma_data_direction data_direction = cmd->data_direction; 10390fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); 10405787cacdSChristoph Hellwig struct pscsi_plugin_task *pt; 104102b1a746SChristoph Hellwig struct request *req; 104202b1a746SChristoph Hellwig struct bio *hbio; 1043de103c93SChristoph Hellwig sense_reason_t ret; 1044c66ac9dbSNicholas Bellinger 10455787cacdSChristoph Hellwig /* 10465787cacdSChristoph Hellwig * Dynamically alloc cdb space, since it may be larger than 10475787cacdSChristoph Hellwig * TCM_MAX_COMMAND_SIZE 10485787cacdSChristoph Hellwig */ 10495787cacdSChristoph Hellwig pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL); 10505787cacdSChristoph Hellwig if (!pt) { 1051de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 10525787cacdSChristoph Hellwig } 10535787cacdSChristoph Hellwig cmd->priv = pt; 10545787cacdSChristoph Hellwig 1055ed3102c6SChristoph Hellwig memcpy(pt->pscsi_cdb, cmd->t_task_cdb, 1056ed3102c6SChristoph Hellwig scsi_command_size(cmd->t_task_cdb)); 1057485fd0d1SChristoph Hellwig 105864f1db38SChristoph Hellwig if (!sgl) { 105902b1a746SChristoph Hellwig req = blk_get_request(pdv->pdv_sd->request_queue, 10605787cacdSChristoph Hellwig (data_direction == DMA_TO_DEVICE), 106102b1a746SChristoph Hellwig GFP_KERNEL); 1062a492f075SJoe Lawrence if (IS_ERR(req)) { 1063fdb4c1f3SDan Carpenter pr_err("PSCSI: blk_get_request() failed\n"); 1064de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 10655787cacdSChristoph Hellwig goto fail; 106602b1a746SChristoph Hellwig } 1067f27b087bSJens Axboe 1068f27b087bSJens Axboe blk_rq_set_block_pc(req); 106902b1a746SChristoph Hellwig } else { 10707a83aa4eSChristoph Hellwig BUG_ON(!cmd->data_length); 107102b1a746SChristoph Hellwig 10725787cacdSChristoph Hellwig ret = pscsi_map_sg(cmd, sgl, sgl_nents, data_direction, &hbio); 1073de103c93SChristoph Hellwig if (ret) 10745787cacdSChristoph Hellwig goto fail; 1075c66ac9dbSNicholas Bellinger 107602b1a746SChristoph Hellwig req = blk_make_request(pdv->pdv_sd->request_queue, hbio, 107702b1a746SChristoph Hellwig GFP_KERNEL); 1078ed327ed3SDan Carpenter if (IS_ERR(req)) { 107902b1a746SChristoph Hellwig pr_err("pSCSI: blk_make_request() failed\n"); 1080de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 10815787cacdSChristoph Hellwig goto fail_free_bio; 108202b1a746SChristoph Hellwig } 108302b1a746SChristoph Hellwig } 108402b1a746SChristoph Hellwig 108502b1a746SChristoph Hellwig req->end_io = pscsi_req_done; 10865787cacdSChristoph Hellwig req->end_io_data = cmd; 108702b1a746SChristoph Hellwig req->cmd_len = scsi_command_size(pt->pscsi_cdb); 108802b1a746SChristoph Hellwig req->cmd = &pt->pscsi_cdb[0]; 108902b1a746SChristoph Hellwig req->sense = &pt->pscsi_sense[0]; 109002b1a746SChristoph Hellwig req->sense_len = 0; 109102b1a746SChristoph Hellwig if (pdv->pdv_sd->type == TYPE_DISK) 109202b1a746SChristoph Hellwig req->timeout = PS_TIMEOUT_DISK; 109302b1a746SChristoph Hellwig else 109402b1a746SChristoph Hellwig req->timeout = PS_TIMEOUT_OTHER; 109502b1a746SChristoph Hellwig req->retries = PS_RETRY; 109602b1a746SChristoph Hellwig 109702b1a746SChristoph Hellwig blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, 109868d81f40SChristoph Hellwig (cmd->sam_task_attr == TCM_HEAD_TAG), 109902b1a746SChristoph Hellwig pscsi_req_done); 110002b1a746SChristoph Hellwig 110103e98c9eSNicholas Bellinger return 0; 110202b1a746SChristoph Hellwig 11035787cacdSChristoph Hellwig fail_free_bio: 110402b1a746SChristoph Hellwig while (hbio) { 110502b1a746SChristoph Hellwig struct bio *bio = hbio; 110602b1a746SChristoph Hellwig hbio = hbio->bi_next; 110702b1a746SChristoph Hellwig bio_endio(bio, 0); /* XXX: should be error */ 110802b1a746SChristoph Hellwig } 1109de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 11105787cacdSChristoph Hellwig fail: 11115787cacdSChristoph Hellwig kfree(pt); 1112de103c93SChristoph Hellwig return ret; 111302b1a746SChristoph Hellwig } 111402b1a746SChristoph Hellwig 1115c66ac9dbSNicholas Bellinger /* pscsi_get_device_type(): 1116c66ac9dbSNicholas Bellinger * 1117c66ac9dbSNicholas Bellinger * 1118c66ac9dbSNicholas Bellinger */ 1119c66ac9dbSNicholas Bellinger static u32 pscsi_get_device_type(struct se_device *dev) 1120c66ac9dbSNicholas Bellinger { 11210fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 1122c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 1123c66ac9dbSNicholas Bellinger 1124215a8fe4SNicholas Bellinger return (sd) ? sd->type : TYPE_NO_LUN; 1125c66ac9dbSNicholas Bellinger } 1126c66ac9dbSNicholas Bellinger 1127c66ac9dbSNicholas Bellinger static sector_t pscsi_get_blocks(struct se_device *dev) 1128c66ac9dbSNicholas Bellinger { 11290fd97ccfSChristoph Hellwig struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); 1130c66ac9dbSNicholas Bellinger 1131c66ac9dbSNicholas Bellinger if (pdv->pdv_bd && pdv->pdv_bd->bd_part) 1132c66ac9dbSNicholas Bellinger return pdv->pdv_bd->bd_part->nr_sects; 1133c66ac9dbSNicholas Bellinger 1134c66ac9dbSNicholas Bellinger dump_stack(); 1135c66ac9dbSNicholas Bellinger return 0; 1136c66ac9dbSNicholas Bellinger } 1137c66ac9dbSNicholas Bellinger 11385787cacdSChristoph Hellwig static void pscsi_req_done(struct request *req, int uptodate) 1139c66ac9dbSNicholas Bellinger { 11405787cacdSChristoph Hellwig struct se_cmd *cmd = req->end_io_data; 11415787cacdSChristoph Hellwig struct pscsi_plugin_task *pt = cmd->priv; 11425787cacdSChristoph Hellwig 11435787cacdSChristoph Hellwig pt->pscsi_result = req->errors; 11445787cacdSChristoph Hellwig pt->pscsi_resid = req->resid_len; 11455787cacdSChristoph Hellwig 11465787cacdSChristoph Hellwig cmd->scsi_status = status_byte(pt->pscsi_result) << 1; 11475787cacdSChristoph Hellwig if (cmd->scsi_status) { 11485787cacdSChristoph Hellwig pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" 11495787cacdSChristoph Hellwig " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], 1150c66ac9dbSNicholas Bellinger pt->pscsi_result); 1151c66ac9dbSNicholas Bellinger } 1152c66ac9dbSNicholas Bellinger 1153c66ac9dbSNicholas Bellinger switch (host_byte(pt->pscsi_result)) { 1154c66ac9dbSNicholas Bellinger case DID_OK: 11555787cacdSChristoph Hellwig target_complete_cmd(cmd, cmd->scsi_status); 1156c66ac9dbSNicholas Bellinger break; 1157c66ac9dbSNicholas Bellinger default: 11585787cacdSChristoph Hellwig pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" 11595787cacdSChristoph Hellwig " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], 1160c66ac9dbSNicholas Bellinger pt->pscsi_result); 11615787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); 1162c66ac9dbSNicholas Bellinger break; 1163c66ac9dbSNicholas Bellinger } 1164c66ac9dbSNicholas Bellinger 1165c66ac9dbSNicholas Bellinger __blk_put_request(req->q, req); 11665787cacdSChristoph Hellwig kfree(pt); 1167c66ac9dbSNicholas Bellinger } 1168c66ac9dbSNicholas Bellinger 11696cfb546bSNicholas Bellinger DEF_TB_DEV_ATTRIB_RO(pscsi, hw_pi_prot_type); 11706cfb546bSNicholas Bellinger TB_DEV_ATTR_RO(pscsi, hw_pi_prot_type); 11716cfb546bSNicholas Bellinger 11726cfb546bSNicholas Bellinger DEF_TB_DEV_ATTRIB_RO(pscsi, hw_block_size); 11736cfb546bSNicholas Bellinger TB_DEV_ATTR_RO(pscsi, hw_block_size); 11746cfb546bSNicholas Bellinger 11756cfb546bSNicholas Bellinger DEF_TB_DEV_ATTRIB_RO(pscsi, hw_max_sectors); 11766cfb546bSNicholas Bellinger TB_DEV_ATTR_RO(pscsi, hw_max_sectors); 11776cfb546bSNicholas Bellinger 11786cfb546bSNicholas Bellinger DEF_TB_DEV_ATTRIB_RO(pscsi, hw_queue_depth); 11796cfb546bSNicholas Bellinger TB_DEV_ATTR_RO(pscsi, hw_queue_depth); 11806cfb546bSNicholas Bellinger 11816cfb546bSNicholas Bellinger static struct configfs_attribute *pscsi_backend_dev_attrs[] = { 11826cfb546bSNicholas Bellinger &pscsi_dev_attrib_hw_pi_prot_type.attr, 11836cfb546bSNicholas Bellinger &pscsi_dev_attrib_hw_block_size.attr, 11846cfb546bSNicholas Bellinger &pscsi_dev_attrib_hw_max_sectors.attr, 11856cfb546bSNicholas Bellinger &pscsi_dev_attrib_hw_queue_depth.attr, 11866cfb546bSNicholas Bellinger NULL, 11876cfb546bSNicholas Bellinger }; 11886cfb546bSNicholas Bellinger 1189c66ac9dbSNicholas Bellinger static struct se_subsystem_api pscsi_template = { 1190c66ac9dbSNicholas Bellinger .name = "pscsi", 1191c66ac9dbSNicholas Bellinger .owner = THIS_MODULE, 1192c66ac9dbSNicholas Bellinger .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV, 1193c66ac9dbSNicholas Bellinger .attach_hba = pscsi_attach_hba, 1194c66ac9dbSNicholas Bellinger .detach_hba = pscsi_detach_hba, 1195c66ac9dbSNicholas Bellinger .pmode_enable_hba = pscsi_pmode_enable_hba, 11960fd97ccfSChristoph Hellwig .alloc_device = pscsi_alloc_device, 11970fd97ccfSChristoph Hellwig .configure_device = pscsi_configure_device, 1198c66ac9dbSNicholas Bellinger .free_device = pscsi_free_device, 1199c66ac9dbSNicholas Bellinger .transport_complete = pscsi_transport_complete, 1200d6e0175cSChristoph Hellwig .parse_cdb = pscsi_parse_cdb, 1201c66ac9dbSNicholas Bellinger .set_configfs_dev_params = pscsi_set_configfs_dev_params, 1202c66ac9dbSNicholas Bellinger .show_configfs_dev_params = pscsi_show_configfs_dev_params, 1203c66ac9dbSNicholas Bellinger .get_device_type = pscsi_get_device_type, 1204c66ac9dbSNicholas Bellinger .get_blocks = pscsi_get_blocks, 1205c66ac9dbSNicholas Bellinger }; 1206c66ac9dbSNicholas Bellinger 1207c66ac9dbSNicholas Bellinger static int __init pscsi_module_init(void) 1208c66ac9dbSNicholas Bellinger { 12096cfb546bSNicholas Bellinger struct target_backend_cits *tbc = &pscsi_template.tb_cits; 12106cfb546bSNicholas Bellinger 12116cfb546bSNicholas Bellinger target_core_setup_sub_cits(&pscsi_template); 12126cfb546bSNicholas Bellinger tbc->tb_dev_attrib_cit.ct_attrs = pscsi_backend_dev_attrs; 12136cfb546bSNicholas Bellinger 1214c66ac9dbSNicholas Bellinger return transport_subsystem_register(&pscsi_template); 1215c66ac9dbSNicholas Bellinger } 1216c66ac9dbSNicholas Bellinger 121763b91d5aSAsias He static void __exit pscsi_module_exit(void) 1218c66ac9dbSNicholas Bellinger { 1219c66ac9dbSNicholas Bellinger transport_subsystem_release(&pscsi_template); 1220c66ac9dbSNicholas Bellinger } 1221c66ac9dbSNicholas Bellinger 1222c66ac9dbSNicholas Bellinger MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); 1223c66ac9dbSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 1224c66ac9dbSNicholas Bellinger MODULE_LICENSE("GPL"); 1225c66ac9dbSNicholas Bellinger 1226c66ac9dbSNicholas Bellinger module_init(pscsi_module_init); 1227c66ac9dbSNicholas Bellinger module_exit(pscsi_module_exit); 1228