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 * 6c66ac9dbSNicholas Bellinger * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. 7c66ac9dbSNicholas Bellinger * Copyright (c) 2005, 2006, 2007 SBE, Inc. 8c66ac9dbSNicholas Bellinger * Copyright (c) 2007-2010 Rising Tide Systems 9c66ac9dbSNicholas Bellinger * Copyright (c) 2008-2010 Linux-iSCSI.org 10c66ac9dbSNicholas Bellinger * 11c66ac9dbSNicholas Bellinger * Nicholas A. Bellinger <nab@kernel.org> 12c66ac9dbSNicholas Bellinger * 13c66ac9dbSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 14c66ac9dbSNicholas Bellinger * it under the terms of the GNU General Public License as published by 15c66ac9dbSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 16c66ac9dbSNicholas Bellinger * (at your option) any later version. 17c66ac9dbSNicholas Bellinger * 18c66ac9dbSNicholas Bellinger * This program is distributed in the hope that it will be useful, 19c66ac9dbSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 20c66ac9dbSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21c66ac9dbSNicholas Bellinger * GNU General Public License for more details. 22c66ac9dbSNicholas Bellinger * 23c66ac9dbSNicholas Bellinger * You should have received a copy of the GNU General Public License 24c66ac9dbSNicholas Bellinger * along with this program; if not, write to the Free Software 25c66ac9dbSNicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 26c66ac9dbSNicholas Bellinger * 27c66ac9dbSNicholas Bellinger ******************************************************************************/ 28c66ac9dbSNicholas Bellinger 29c66ac9dbSNicholas Bellinger #include <linux/string.h> 30c66ac9dbSNicholas Bellinger #include <linux/parser.h> 31c66ac9dbSNicholas Bellinger #include <linux/timer.h> 32c66ac9dbSNicholas Bellinger #include <linux/blkdev.h> 33c66ac9dbSNicholas Bellinger #include <linux/blk_types.h> 34c66ac9dbSNicholas Bellinger #include <linux/slab.h> 35c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 36c66ac9dbSNicholas Bellinger #include <linux/genhd.h> 37c66ac9dbSNicholas Bellinger #include <linux/cdrom.h> 38c66ac9dbSNicholas Bellinger #include <linux/file.h> 39827509e3SPaul Gortmaker #include <linux/module.h> 40c66ac9dbSNicholas Bellinger #include <scsi/scsi.h> 41c66ac9dbSNicholas Bellinger #include <scsi/scsi_device.h> 42c66ac9dbSNicholas Bellinger #include <scsi/scsi_cmnd.h> 43c66ac9dbSNicholas Bellinger #include <scsi/scsi_host.h> 44e66ecd50SNicholas Bellinger #include <scsi/scsi_tcq.h> 45c66ac9dbSNicholas Bellinger 46c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 47c4795fb2SChristoph Hellwig #include <target/target_core_backend.h> 48c66ac9dbSNicholas Bellinger 49c66ac9dbSNicholas Bellinger #include "target_core_pscsi.h" 50c66ac9dbSNicholas Bellinger 51c66ac9dbSNicholas Bellinger #define ISPRINT(a) ((a >= ' ') && (a <= '~')) 52c66ac9dbSNicholas Bellinger 53c66ac9dbSNicholas Bellinger static struct se_subsystem_api pscsi_template; 54c66ac9dbSNicholas Bellinger 55c66ac9dbSNicholas Bellinger static void pscsi_req_done(struct request *, int); 56c66ac9dbSNicholas Bellinger 57c66ac9dbSNicholas Bellinger /* pscsi_attach_hba(): 58c66ac9dbSNicholas Bellinger * 59c66ac9dbSNicholas Bellinger * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. 60c66ac9dbSNicholas Bellinger * from the passed SCSI Host ID. 61c66ac9dbSNicholas Bellinger */ 62c66ac9dbSNicholas Bellinger static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) 63c66ac9dbSNicholas Bellinger { 64c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv; 65c66ac9dbSNicholas Bellinger 66c66ac9dbSNicholas Bellinger phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); 676708bb27SAndy Grover if (!phv) { 686708bb27SAndy Grover pr_err("Unable to allocate struct pscsi_hba_virt\n"); 69e3d6f909SAndy Grover return -ENOMEM; 70c66ac9dbSNicholas Bellinger } 71c66ac9dbSNicholas Bellinger phv->phv_host_id = host_id; 72e6a8a41aSStefan Hajnoczi phv->phv_mode = PHV_VIRTUAL_HOST_ID; 73c66ac9dbSNicholas Bellinger 745951146dSAndy Grover hba->hba_ptr = phv; 75c66ac9dbSNicholas Bellinger 766708bb27SAndy Grover pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on" 77c66ac9dbSNicholas Bellinger " Generic Target Core Stack %s\n", hba->hba_id, 78c66ac9dbSNicholas Bellinger PSCSI_VERSION, TARGET_CORE_MOD_VERSION); 796708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n", 80e3d6f909SAndy Grover hba->hba_id); 81c66ac9dbSNicholas Bellinger 82c66ac9dbSNicholas Bellinger return 0; 83c66ac9dbSNicholas Bellinger } 84c66ac9dbSNicholas Bellinger 85c66ac9dbSNicholas Bellinger static void pscsi_detach_hba(struct se_hba *hba) 86c66ac9dbSNicholas Bellinger { 87c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 88c66ac9dbSNicholas Bellinger struct Scsi_Host *scsi_host = phv->phv_lld_host; 89c66ac9dbSNicholas Bellinger 90c66ac9dbSNicholas Bellinger if (scsi_host) { 91c66ac9dbSNicholas Bellinger scsi_host_put(scsi_host); 92c66ac9dbSNicholas Bellinger 936708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from" 94c66ac9dbSNicholas Bellinger " Generic Target Core\n", hba->hba_id, 95c66ac9dbSNicholas Bellinger (scsi_host->hostt->name) ? (scsi_host->hostt->name) : 96c66ac9dbSNicholas Bellinger "Unknown"); 97c66ac9dbSNicholas Bellinger } else 986708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA" 99c66ac9dbSNicholas Bellinger " from Generic Target Core\n", hba->hba_id); 100c66ac9dbSNicholas Bellinger 101c66ac9dbSNicholas Bellinger kfree(phv); 102c66ac9dbSNicholas Bellinger hba->hba_ptr = NULL; 103c66ac9dbSNicholas Bellinger } 104c66ac9dbSNicholas Bellinger 105c66ac9dbSNicholas Bellinger static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) 106c66ac9dbSNicholas Bellinger { 1078359cf43SJörn Engel struct pscsi_hba_virt *phv = hba->hba_ptr; 108c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 109c66ac9dbSNicholas Bellinger /* 110c66ac9dbSNicholas Bellinger * Release the struct Scsi_Host 111c66ac9dbSNicholas Bellinger */ 1126708bb27SAndy Grover if (!mode_flag) { 1136708bb27SAndy Grover if (!sh) 114c66ac9dbSNicholas Bellinger return 0; 115c66ac9dbSNicholas Bellinger 116c66ac9dbSNicholas Bellinger phv->phv_lld_host = NULL; 117e6a8a41aSStefan Hajnoczi phv->phv_mode = PHV_VIRTUAL_HOST_ID; 118c66ac9dbSNicholas Bellinger 1196708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" 120c66ac9dbSNicholas Bellinger " %s\n", hba->hba_id, (sh->hostt->name) ? 121c66ac9dbSNicholas Bellinger (sh->hostt->name) : "Unknown"); 122c66ac9dbSNicholas Bellinger 123c66ac9dbSNicholas Bellinger scsi_host_put(sh); 124c66ac9dbSNicholas Bellinger return 0; 125c66ac9dbSNicholas Bellinger } 126c66ac9dbSNicholas Bellinger /* 127c66ac9dbSNicholas Bellinger * Otherwise, locate struct Scsi_Host from the original passed 128c66ac9dbSNicholas Bellinger * pSCSI Host ID and enable for phba mode 129c66ac9dbSNicholas Bellinger */ 130e3d6f909SAndy Grover sh = scsi_host_lookup(phv->phv_host_id); 131e3d6f909SAndy Grover if (IS_ERR(sh)) { 1326708bb27SAndy Grover pr_err("pSCSI: Unable to locate SCSI Host for" 133c66ac9dbSNicholas Bellinger " phv_host_id: %d\n", phv->phv_host_id); 134e3d6f909SAndy Grover return PTR_ERR(sh); 135c66ac9dbSNicholas Bellinger } 136c66ac9dbSNicholas Bellinger 137c66ac9dbSNicholas Bellinger phv->phv_lld_host = sh; 138c66ac9dbSNicholas Bellinger phv->phv_mode = PHV_LLD_SCSI_HOST_NO; 139c66ac9dbSNicholas Bellinger 1406708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", 141c66ac9dbSNicholas Bellinger hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); 142c66ac9dbSNicholas Bellinger 143c66ac9dbSNicholas Bellinger return 1; 144c66ac9dbSNicholas Bellinger } 145c66ac9dbSNicholas Bellinger 146c66ac9dbSNicholas Bellinger static void pscsi_tape_read_blocksize(struct se_device *dev, 147c66ac9dbSNicholas Bellinger struct scsi_device *sdev) 148c66ac9dbSNicholas Bellinger { 149c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 150c66ac9dbSNicholas Bellinger int ret; 151c66ac9dbSNicholas Bellinger 152c66ac9dbSNicholas Bellinger buf = kzalloc(12, GFP_KERNEL); 153c66ac9dbSNicholas Bellinger if (!buf) 154c66ac9dbSNicholas Bellinger return; 155c66ac9dbSNicholas Bellinger 156c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 157c66ac9dbSNicholas Bellinger cdb[0] = MODE_SENSE; 158c66ac9dbSNicholas Bellinger cdb[4] = 0x0c; /* 12 bytes */ 159c66ac9dbSNicholas Bellinger 160c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, 161c66ac9dbSNicholas Bellinger HZ, 1, NULL); 162c66ac9dbSNicholas Bellinger if (ret) 163c66ac9dbSNicholas Bellinger goto out_free; 164c66ac9dbSNicholas Bellinger 165c66ac9dbSNicholas Bellinger /* 166c66ac9dbSNicholas Bellinger * If MODE_SENSE still returns zero, set the default value to 1024. 167c66ac9dbSNicholas Bellinger */ 168c66ac9dbSNicholas Bellinger sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); 169c66ac9dbSNicholas Bellinger if (!sdev->sector_size) 170c66ac9dbSNicholas Bellinger sdev->sector_size = 1024; 171c66ac9dbSNicholas Bellinger out_free: 172c66ac9dbSNicholas Bellinger kfree(buf); 173c66ac9dbSNicholas Bellinger } 174c66ac9dbSNicholas Bellinger 175c66ac9dbSNicholas Bellinger static void 176c66ac9dbSNicholas Bellinger pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) 177c66ac9dbSNicholas Bellinger { 178c66ac9dbSNicholas Bellinger unsigned char *buf; 179c66ac9dbSNicholas Bellinger 180c66ac9dbSNicholas Bellinger if (sdev->inquiry_len < INQUIRY_LEN) 181c66ac9dbSNicholas Bellinger return; 182c66ac9dbSNicholas Bellinger 183c66ac9dbSNicholas Bellinger buf = sdev->inquiry; 184c66ac9dbSNicholas Bellinger if (!buf) 185c66ac9dbSNicholas Bellinger return; 186c66ac9dbSNicholas Bellinger /* 187c66ac9dbSNicholas Bellinger * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() 188c66ac9dbSNicholas Bellinger */ 189c66ac9dbSNicholas Bellinger memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); 190c66ac9dbSNicholas Bellinger memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); 191c66ac9dbSNicholas Bellinger memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); 192c66ac9dbSNicholas Bellinger } 193c66ac9dbSNicholas Bellinger 194c66ac9dbSNicholas Bellinger static int 195c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) 196c66ac9dbSNicholas Bellinger { 197c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 198c66ac9dbSNicholas Bellinger int ret; 199c66ac9dbSNicholas Bellinger 200c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 201c66ac9dbSNicholas Bellinger if (!buf) 202e3d6f909SAndy Grover return -ENOMEM; 203c66ac9dbSNicholas Bellinger 204c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 205c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 206c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 207c66ac9dbSNicholas Bellinger cdb[2] = 0x80; /* Unit Serial Number */ 208c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; 209c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); 210c66ac9dbSNicholas Bellinger 211c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 212c66ac9dbSNicholas Bellinger INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); 213c66ac9dbSNicholas Bellinger if (ret) 214c66ac9dbSNicholas Bellinger goto out_free; 215c66ac9dbSNicholas Bellinger 216c66ac9dbSNicholas Bellinger snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); 217c66ac9dbSNicholas Bellinger 218c66ac9dbSNicholas Bellinger wwn->t10_sub_dev->su_dev_flags |= SDF_FIRMWARE_VPD_UNIT_SERIAL; 219c66ac9dbSNicholas Bellinger 220c66ac9dbSNicholas Bellinger kfree(buf); 221c66ac9dbSNicholas Bellinger return 0; 222c66ac9dbSNicholas Bellinger 223c66ac9dbSNicholas Bellinger out_free: 224c66ac9dbSNicholas Bellinger kfree(buf); 225e3d6f909SAndy Grover return -EPERM; 226c66ac9dbSNicholas Bellinger } 227c66ac9dbSNicholas Bellinger 228c66ac9dbSNicholas Bellinger static void 229c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, 230c66ac9dbSNicholas Bellinger struct t10_wwn *wwn) 231c66ac9dbSNicholas Bellinger { 232c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; 233c66ac9dbSNicholas Bellinger int ident_len, page_len, off = 4, ret; 234c66ac9dbSNicholas Bellinger struct t10_vpd *vpd; 235c66ac9dbSNicholas Bellinger 236c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 237c66ac9dbSNicholas Bellinger if (!buf) 238c66ac9dbSNicholas Bellinger return; 239c66ac9dbSNicholas Bellinger 240c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 241c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 242c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 243c66ac9dbSNicholas Bellinger cdb[2] = 0x83; /* Device Identifier */ 244c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; 245c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); 246c66ac9dbSNicholas Bellinger 247c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 248c66ac9dbSNicholas Bellinger INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, 249c66ac9dbSNicholas Bellinger NULL, HZ, 1, NULL); 250c66ac9dbSNicholas Bellinger if (ret) 251c66ac9dbSNicholas Bellinger goto out; 252c66ac9dbSNicholas Bellinger 253c66ac9dbSNicholas Bellinger page_len = (buf[2] << 8) | buf[3]; 254c66ac9dbSNicholas Bellinger while (page_len > 0) { 255c66ac9dbSNicholas Bellinger /* Grab a pointer to the Identification descriptor */ 256c66ac9dbSNicholas Bellinger page_83 = &buf[off]; 257c66ac9dbSNicholas Bellinger ident_len = page_83[3]; 258c66ac9dbSNicholas Bellinger if (!ident_len) { 2596708bb27SAndy Grover pr_err("page_83[3]: identifier" 260c66ac9dbSNicholas Bellinger " length zero!\n"); 261c66ac9dbSNicholas Bellinger break; 262c66ac9dbSNicholas Bellinger } 2636708bb27SAndy Grover pr_debug("T10 VPD Identifer Length: %d\n", ident_len); 264c66ac9dbSNicholas Bellinger 265c66ac9dbSNicholas Bellinger vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); 266c66ac9dbSNicholas Bellinger if (!vpd) { 2676708bb27SAndy Grover pr_err("Unable to allocate memory for" 268c66ac9dbSNicholas Bellinger " struct t10_vpd\n"); 269c66ac9dbSNicholas Bellinger goto out; 270c66ac9dbSNicholas Bellinger } 271c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&vpd->vpd_list); 272c66ac9dbSNicholas Bellinger 273c66ac9dbSNicholas Bellinger transport_set_vpd_proto_id(vpd, page_83); 274c66ac9dbSNicholas Bellinger transport_set_vpd_assoc(vpd, page_83); 275c66ac9dbSNicholas Bellinger 276c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident_type(vpd, page_83) < 0) { 277c66ac9dbSNicholas Bellinger off += (ident_len + 4); 278c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 279c66ac9dbSNicholas Bellinger kfree(vpd); 280c66ac9dbSNicholas Bellinger continue; 281c66ac9dbSNicholas Bellinger } 282c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident(vpd, page_83) < 0) { 283c66ac9dbSNicholas Bellinger off += (ident_len + 4); 284c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 285c66ac9dbSNicholas Bellinger kfree(vpd); 286c66ac9dbSNicholas Bellinger continue; 287c66ac9dbSNicholas Bellinger } 288c66ac9dbSNicholas Bellinger 289c66ac9dbSNicholas Bellinger list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); 290c66ac9dbSNicholas Bellinger off += (ident_len + 4); 291c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 292c66ac9dbSNicholas Bellinger } 293c66ac9dbSNicholas Bellinger 294c66ac9dbSNicholas Bellinger out: 295c66ac9dbSNicholas Bellinger kfree(buf); 296c66ac9dbSNicholas Bellinger } 297c66ac9dbSNicholas Bellinger 298c66ac9dbSNicholas Bellinger /* pscsi_add_device_to_list(): 299c66ac9dbSNicholas Bellinger * 300c66ac9dbSNicholas Bellinger * 301c66ac9dbSNicholas Bellinger */ 302c66ac9dbSNicholas Bellinger static struct se_device *pscsi_add_device_to_list( 303c66ac9dbSNicholas Bellinger struct se_hba *hba, 304c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 305c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 306c66ac9dbSNicholas Bellinger struct scsi_device *sd, 307c66ac9dbSNicholas Bellinger int dev_flags) 308c66ac9dbSNicholas Bellinger { 309c66ac9dbSNicholas Bellinger struct se_device *dev; 310c66ac9dbSNicholas Bellinger struct se_dev_limits dev_limits; 311c66ac9dbSNicholas Bellinger struct request_queue *q; 312c66ac9dbSNicholas Bellinger struct queue_limits *limits; 313c66ac9dbSNicholas Bellinger 314c66ac9dbSNicholas Bellinger memset(&dev_limits, 0, sizeof(struct se_dev_limits)); 315c66ac9dbSNicholas Bellinger 316c66ac9dbSNicholas Bellinger if (!sd->queue_depth) { 317c66ac9dbSNicholas Bellinger sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; 318c66ac9dbSNicholas Bellinger 3196708bb27SAndy Grover pr_err("Set broken SCSI Device %d:%d:%d" 320c66ac9dbSNicholas Bellinger " queue_depth to %d\n", sd->channel, sd->id, 321c66ac9dbSNicholas Bellinger sd->lun, sd->queue_depth); 322c66ac9dbSNicholas Bellinger } 323c66ac9dbSNicholas Bellinger /* 324c66ac9dbSNicholas Bellinger * Setup the local scope queue_limits from struct request_queue->limits 325c66ac9dbSNicholas Bellinger * to pass into transport_add_device_to_core_hba() as struct se_dev_limits. 326c66ac9dbSNicholas Bellinger */ 327c66ac9dbSNicholas Bellinger q = sd->request_queue; 328c66ac9dbSNicholas Bellinger limits = &dev_limits.limits; 329c66ac9dbSNicholas Bellinger limits->logical_block_size = sd->sector_size; 330a1d8b49aSAndy Grover limits->max_hw_sectors = min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q)); 331a1d8b49aSAndy Grover limits->max_sectors = min_t(int, sd->host->max_sectors, queue_max_sectors(q)); 332c66ac9dbSNicholas Bellinger dev_limits.hw_queue_depth = sd->queue_depth; 333c66ac9dbSNicholas Bellinger dev_limits.queue_depth = sd->queue_depth; 334c66ac9dbSNicholas Bellinger /* 335c66ac9dbSNicholas Bellinger * Setup our standard INQUIRY info into se_dev->t10_wwn 336c66ac9dbSNicholas Bellinger */ 337c66ac9dbSNicholas Bellinger pscsi_set_inquiry_info(sd, &se_dev->t10_wwn); 338c66ac9dbSNicholas Bellinger 339c66ac9dbSNicholas Bellinger /* 340c66ac9dbSNicholas Bellinger * Set the pointer pdv->pdv_sd to from passed struct scsi_device, 341c66ac9dbSNicholas Bellinger * which has already been referenced with Linux SCSI code with 342c66ac9dbSNicholas Bellinger * scsi_device_get() in this file's pscsi_create_virtdevice(). 343c66ac9dbSNicholas Bellinger * 344c66ac9dbSNicholas Bellinger * The passthrough operations called by the transport_add_device_* 345c66ac9dbSNicholas Bellinger * function below will require this pointer to be set for passthroug 346c66ac9dbSNicholas Bellinger * ops. 347c66ac9dbSNicholas Bellinger * 348c66ac9dbSNicholas Bellinger * For the shutdown case in pscsi_free_device(), this struct 349c66ac9dbSNicholas Bellinger * scsi_device reference is released with Linux SCSI code 350c66ac9dbSNicholas Bellinger * scsi_device_put() and the pdv->pdv_sd cleared. 351c66ac9dbSNicholas Bellinger */ 352c66ac9dbSNicholas Bellinger pdv->pdv_sd = sd; 353c66ac9dbSNicholas Bellinger dev = transport_add_device_to_core_hba(hba, &pscsi_template, 3545951146dSAndy Grover se_dev, dev_flags, pdv, 355c66ac9dbSNicholas Bellinger &dev_limits, NULL, NULL); 3566708bb27SAndy Grover if (!dev) { 357c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 358c66ac9dbSNicholas Bellinger return NULL; 359c66ac9dbSNicholas Bellinger } 360c66ac9dbSNicholas Bellinger 361c66ac9dbSNicholas Bellinger /* 362c66ac9dbSNicholas Bellinger * Locate VPD WWN Information used for various purposes within 363c66ac9dbSNicholas Bellinger * the Storage Engine. 364c66ac9dbSNicholas Bellinger */ 365c66ac9dbSNicholas Bellinger if (!pscsi_get_inquiry_vpd_serial(sd, &se_dev->t10_wwn)) { 366c66ac9dbSNicholas Bellinger /* 367c66ac9dbSNicholas Bellinger * If VPD Unit Serial returned GOOD status, try 368c66ac9dbSNicholas Bellinger * VPD Device Identification page (0x83). 369c66ac9dbSNicholas Bellinger */ 370c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_device_ident(sd, &se_dev->t10_wwn); 371c66ac9dbSNicholas Bellinger } 372c66ac9dbSNicholas Bellinger 373c66ac9dbSNicholas Bellinger /* 374c66ac9dbSNicholas Bellinger * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. 375c66ac9dbSNicholas Bellinger */ 376c66ac9dbSNicholas Bellinger if (sd->type == TYPE_TAPE) 377c66ac9dbSNicholas Bellinger pscsi_tape_read_blocksize(dev, sd); 378c66ac9dbSNicholas Bellinger return dev; 379c66ac9dbSNicholas Bellinger } 380c66ac9dbSNicholas Bellinger 381c66ac9dbSNicholas Bellinger static void *pscsi_allocate_virtdevice(struct se_hba *hba, const char *name) 382c66ac9dbSNicholas Bellinger { 383c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv; 384c66ac9dbSNicholas Bellinger 385c66ac9dbSNicholas Bellinger pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); 3866708bb27SAndy Grover if (!pdv) { 3876708bb27SAndy Grover pr_err("Unable to allocate memory for struct pscsi_dev_virt\n"); 388c66ac9dbSNicholas Bellinger return NULL; 389c66ac9dbSNicholas Bellinger } 390c66ac9dbSNicholas Bellinger pdv->pdv_se_hba = hba; 391c66ac9dbSNicholas Bellinger 3926708bb27SAndy Grover pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name); 3935951146dSAndy Grover return pdv; 394c66ac9dbSNicholas Bellinger } 395c66ac9dbSNicholas Bellinger 396c66ac9dbSNicholas Bellinger /* 397c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 398c66ac9dbSNicholas Bellinger */ 399c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_type_disk( 400c66ac9dbSNicholas Bellinger struct scsi_device *sd, 401c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 402c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 403c66ac9dbSNicholas Bellinger struct se_hba *hba) 4045dd7ed2eSDan Carpenter __releases(sh->host_lock) 405c66ac9dbSNicholas Bellinger { 406c66ac9dbSNicholas Bellinger struct se_device *dev; 4078359cf43SJörn Engel struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; 408c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 409c66ac9dbSNicholas Bellinger struct block_device *bd; 410c66ac9dbSNicholas Bellinger u32 dev_flags = 0; 411c66ac9dbSNicholas Bellinger 412c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 4136708bb27SAndy Grover pr_err("scsi_device_get() failed for %d:%d:%d:%d\n", 414c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 415c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 416c66ac9dbSNicholas Bellinger return NULL; 417c66ac9dbSNicholas Bellinger } 418c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 419c66ac9dbSNicholas Bellinger /* 420c66ac9dbSNicholas Bellinger * Claim exclusive struct block_device access to struct scsi_device 421c66ac9dbSNicholas Bellinger * for TYPE_DISK using supplied udev_path 422c66ac9dbSNicholas Bellinger */ 423c66ac9dbSNicholas Bellinger bd = blkdev_get_by_path(se_dev->se_dev_udev_path, 424c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); 4253ae279d2SDan Carpenter if (IS_ERR(bd)) { 4266708bb27SAndy Grover pr_err("pSCSI: blkdev_get_by_path() failed\n"); 427c66ac9dbSNicholas Bellinger scsi_device_put(sd); 428c66ac9dbSNicholas Bellinger return NULL; 429c66ac9dbSNicholas Bellinger } 430c66ac9dbSNicholas Bellinger pdv->pdv_bd = bd; 431c66ac9dbSNicholas Bellinger 432c66ac9dbSNicholas Bellinger dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); 4336708bb27SAndy Grover if (!dev) { 434c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); 435c66ac9dbSNicholas Bellinger scsi_device_put(sd); 436c66ac9dbSNicholas Bellinger return NULL; 437c66ac9dbSNicholas Bellinger } 4386708bb27SAndy Grover pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%d\n", 439c66ac9dbSNicholas Bellinger phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); 440c66ac9dbSNicholas Bellinger 441c66ac9dbSNicholas Bellinger return dev; 442c66ac9dbSNicholas Bellinger } 443c66ac9dbSNicholas Bellinger 444c66ac9dbSNicholas Bellinger /* 445c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 446c66ac9dbSNicholas Bellinger */ 447c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_type_rom( 448c66ac9dbSNicholas Bellinger struct scsi_device *sd, 449c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 450c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 451c66ac9dbSNicholas Bellinger struct se_hba *hba) 4525dd7ed2eSDan Carpenter __releases(sh->host_lock) 453c66ac9dbSNicholas Bellinger { 454c66ac9dbSNicholas Bellinger struct se_device *dev; 4558359cf43SJörn Engel struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; 456c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 457c66ac9dbSNicholas Bellinger u32 dev_flags = 0; 458c66ac9dbSNicholas Bellinger 459c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 4606708bb27SAndy Grover pr_err("scsi_device_get() failed for %d:%d:%d:%d\n", 461c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 462c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 463c66ac9dbSNicholas Bellinger return NULL; 464c66ac9dbSNicholas Bellinger } 465c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 466c66ac9dbSNicholas Bellinger 467c66ac9dbSNicholas Bellinger dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); 4686708bb27SAndy Grover if (!dev) { 469c66ac9dbSNicholas Bellinger scsi_device_put(sd); 470c66ac9dbSNicholas Bellinger return NULL; 471c66ac9dbSNicholas Bellinger } 4726708bb27SAndy Grover pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", 473c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 474c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 475c66ac9dbSNicholas Bellinger 476c66ac9dbSNicholas Bellinger return dev; 477c66ac9dbSNicholas Bellinger } 478c66ac9dbSNicholas Bellinger 479c66ac9dbSNicholas Bellinger /* 480c66ac9dbSNicholas Bellinger *Called with struct Scsi_Host->host_lock called. 481c66ac9dbSNicholas Bellinger */ 482c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_type_other( 483c66ac9dbSNicholas Bellinger struct scsi_device *sd, 484c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 485c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 486c66ac9dbSNicholas Bellinger struct se_hba *hba) 4875dd7ed2eSDan Carpenter __releases(sh->host_lock) 488c66ac9dbSNicholas Bellinger { 489c66ac9dbSNicholas Bellinger struct se_device *dev; 4908359cf43SJörn Engel struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; 491c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 492c66ac9dbSNicholas Bellinger u32 dev_flags = 0; 493c66ac9dbSNicholas Bellinger 494c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 495c66ac9dbSNicholas Bellinger dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); 4966708bb27SAndy Grover if (!dev) 497c66ac9dbSNicholas Bellinger return NULL; 498c66ac9dbSNicholas Bellinger 4996708bb27SAndy Grover pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", 500c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 501c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 502c66ac9dbSNicholas Bellinger 503c66ac9dbSNicholas Bellinger return dev; 504c66ac9dbSNicholas Bellinger } 505c66ac9dbSNicholas Bellinger 506c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_virtdevice( 507c66ac9dbSNicholas Bellinger struct se_hba *hba, 508c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 509c66ac9dbSNicholas Bellinger void *p) 510c66ac9dbSNicholas Bellinger { 5118359cf43SJörn Engel struct pscsi_dev_virt *pdv = p; 512c66ac9dbSNicholas Bellinger struct se_device *dev; 513c66ac9dbSNicholas Bellinger struct scsi_device *sd; 5148359cf43SJörn Engel struct pscsi_hba_virt *phv = hba->hba_ptr; 515c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 516c66ac9dbSNicholas Bellinger int legacy_mode_enable = 0; 517c66ac9dbSNicholas Bellinger 5186708bb27SAndy Grover if (!pdv) { 5196708bb27SAndy Grover pr_err("Unable to locate struct pscsi_dev_virt" 520c66ac9dbSNicholas Bellinger " parameter\n"); 521613640e4SNicholas Bellinger return ERR_PTR(-EINVAL); 522c66ac9dbSNicholas Bellinger } 523c66ac9dbSNicholas Bellinger /* 524c66ac9dbSNicholas Bellinger * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the 525c66ac9dbSNicholas Bellinger * struct Scsi_Host we will need to bring the TCM/pSCSI object online 526c66ac9dbSNicholas Bellinger */ 5276708bb27SAndy Grover if (!sh) { 528c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 5296708bb27SAndy Grover pr_err("pSCSI: Unable to locate struct" 530c66ac9dbSNicholas Bellinger " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); 531613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 532c66ac9dbSNicholas Bellinger } 533c66ac9dbSNicholas Bellinger /* 534e6a8a41aSStefan Hajnoczi * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device 535c66ac9dbSNicholas Bellinger * reference, we enforce that udev_path has been set 536c66ac9dbSNicholas Bellinger */ 537c66ac9dbSNicholas Bellinger if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) { 5386708bb27SAndy Grover pr_err("pSCSI: udev_path attribute has not" 539c66ac9dbSNicholas Bellinger " been set before ENABLE=1\n"); 540613640e4SNicholas Bellinger return ERR_PTR(-EINVAL); 541c66ac9dbSNicholas Bellinger } 542c66ac9dbSNicholas Bellinger /* 543e6a8a41aSStefan Hajnoczi * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID, 544c66ac9dbSNicholas Bellinger * use the original TCM hba ID to reference Linux/SCSI Host No 545c66ac9dbSNicholas Bellinger * and enable for PHV_LLD_SCSI_HOST_NO mode. 546c66ac9dbSNicholas Bellinger */ 547c66ac9dbSNicholas Bellinger if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { 548c66ac9dbSNicholas Bellinger spin_lock(&hba->device_lock); 5496708bb27SAndy Grover if (!list_empty(&hba->hba_dev_list)) { 5506708bb27SAndy Grover pr_err("pSCSI: Unable to set hba_mode" 551c66ac9dbSNicholas Bellinger " with active devices\n"); 552c66ac9dbSNicholas Bellinger spin_unlock(&hba->device_lock); 553613640e4SNicholas Bellinger return ERR_PTR(-EEXIST); 554c66ac9dbSNicholas Bellinger } 555c66ac9dbSNicholas Bellinger spin_unlock(&hba->device_lock); 556c66ac9dbSNicholas Bellinger 557c66ac9dbSNicholas Bellinger if (pscsi_pmode_enable_hba(hba, 1) != 1) 558613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 559c66ac9dbSNicholas Bellinger 560c66ac9dbSNicholas Bellinger legacy_mode_enable = 1; 561c66ac9dbSNicholas Bellinger hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 562c66ac9dbSNicholas Bellinger sh = phv->phv_lld_host; 563c66ac9dbSNicholas Bellinger } else { 564e3d6f909SAndy Grover sh = scsi_host_lookup(pdv->pdv_host_id); 565e3d6f909SAndy Grover if (IS_ERR(sh)) { 5666708bb27SAndy Grover pr_err("pSCSI: Unable to locate" 567c66ac9dbSNicholas Bellinger " pdv_host_id: %d\n", pdv->pdv_host_id); 568942d8264SDan Carpenter return ERR_CAST(sh); 569c66ac9dbSNicholas Bellinger } 570c66ac9dbSNicholas Bellinger } 571c66ac9dbSNicholas Bellinger } else { 572e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) { 573e6a8a41aSStefan Hajnoczi pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while" 574c66ac9dbSNicholas Bellinger " struct Scsi_Host exists\n"); 575613640e4SNicholas Bellinger return ERR_PTR(-EEXIST); 576c66ac9dbSNicholas Bellinger } 577c66ac9dbSNicholas Bellinger } 578c66ac9dbSNicholas Bellinger 579c66ac9dbSNicholas Bellinger spin_lock_irq(sh->host_lock); 580c66ac9dbSNicholas Bellinger list_for_each_entry(sd, &sh->__devices, siblings) { 581c66ac9dbSNicholas Bellinger if ((pdv->pdv_channel_id != sd->channel) || 582c66ac9dbSNicholas Bellinger (pdv->pdv_target_id != sd->id) || 583c66ac9dbSNicholas Bellinger (pdv->pdv_lun_id != sd->lun)) 584c66ac9dbSNicholas Bellinger continue; 585c66ac9dbSNicholas Bellinger /* 586c66ac9dbSNicholas Bellinger * Functions will release the held struct scsi_host->host_lock 587c66ac9dbSNicholas Bellinger * before calling calling pscsi_add_device_to_list() to register 588c66ac9dbSNicholas Bellinger * struct scsi_device with target_core_mod. 589c66ac9dbSNicholas Bellinger */ 590c66ac9dbSNicholas Bellinger switch (sd->type) { 591c66ac9dbSNicholas Bellinger case TYPE_DISK: 592c66ac9dbSNicholas Bellinger dev = pscsi_create_type_disk(sd, pdv, se_dev, hba); 593c66ac9dbSNicholas Bellinger break; 594c66ac9dbSNicholas Bellinger case TYPE_ROM: 595c66ac9dbSNicholas Bellinger dev = pscsi_create_type_rom(sd, pdv, se_dev, hba); 596c66ac9dbSNicholas Bellinger break; 597c66ac9dbSNicholas Bellinger default: 598c66ac9dbSNicholas Bellinger dev = pscsi_create_type_other(sd, pdv, se_dev, hba); 599c66ac9dbSNicholas Bellinger break; 600c66ac9dbSNicholas Bellinger } 601c66ac9dbSNicholas Bellinger 6026708bb27SAndy Grover if (!dev) { 603e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 604c66ac9dbSNicholas Bellinger scsi_host_put(sh); 605c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 606c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 607c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 608c66ac9dbSNicholas Bellinger } 609c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 610613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 611c66ac9dbSNicholas Bellinger } 612c66ac9dbSNicholas Bellinger return dev; 613c66ac9dbSNicholas Bellinger } 614c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 615c66ac9dbSNicholas Bellinger 6166708bb27SAndy Grover pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, 617c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); 618c66ac9dbSNicholas Bellinger 619e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 620c66ac9dbSNicholas Bellinger scsi_host_put(sh); 621c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 622c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 623c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 624c66ac9dbSNicholas Bellinger } 625c66ac9dbSNicholas Bellinger 626613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 627c66ac9dbSNicholas Bellinger } 628c66ac9dbSNicholas Bellinger 629c66ac9dbSNicholas Bellinger /* pscsi_free_device(): (Part of se_subsystem_api_t template) 630c66ac9dbSNicholas Bellinger * 631c66ac9dbSNicholas Bellinger * 632c66ac9dbSNicholas Bellinger */ 633c66ac9dbSNicholas Bellinger static void pscsi_free_device(void *p) 634c66ac9dbSNicholas Bellinger { 635c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = p; 636c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; 637c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 638c66ac9dbSNicholas Bellinger 639c66ac9dbSNicholas Bellinger if (sd) { 640c66ac9dbSNicholas Bellinger /* 641c66ac9dbSNicholas Bellinger * Release exclusive pSCSI internal struct block_device claim for 642c66ac9dbSNicholas Bellinger * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() 643c66ac9dbSNicholas Bellinger */ 644c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { 645c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, 646c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL); 647c66ac9dbSNicholas Bellinger pdv->pdv_bd = NULL; 648c66ac9dbSNicholas Bellinger } 649c66ac9dbSNicholas Bellinger /* 650c66ac9dbSNicholas Bellinger * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference 651c66ac9dbSNicholas Bellinger * to struct Scsi_Host now. 652c66ac9dbSNicholas Bellinger */ 653c66ac9dbSNicholas Bellinger if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && 654c66ac9dbSNicholas Bellinger (phv->phv_lld_host != NULL)) 655c66ac9dbSNicholas Bellinger scsi_host_put(phv->phv_lld_host); 656c66ac9dbSNicholas Bellinger 657c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) 658c66ac9dbSNicholas Bellinger scsi_device_put(sd); 659c66ac9dbSNicholas Bellinger 660c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 661c66ac9dbSNicholas Bellinger } 662c66ac9dbSNicholas Bellinger 663c66ac9dbSNicholas Bellinger kfree(pdv); 664c66ac9dbSNicholas Bellinger } 665c66ac9dbSNicholas Bellinger 666c66ac9dbSNicholas Bellinger static inline struct pscsi_plugin_task *PSCSI_TASK(struct se_task *task) 667c66ac9dbSNicholas Bellinger { 668c66ac9dbSNicholas Bellinger return container_of(task, struct pscsi_plugin_task, pscsi_task); 669c66ac9dbSNicholas Bellinger } 670c66ac9dbSNicholas Bellinger 671c66ac9dbSNicholas Bellinger 672c66ac9dbSNicholas Bellinger /* pscsi_transport_complete(): 673c66ac9dbSNicholas Bellinger * 674c66ac9dbSNicholas Bellinger * 675c66ac9dbSNicholas Bellinger */ 676c66ac9dbSNicholas Bellinger static int pscsi_transport_complete(struct se_task *task) 677c66ac9dbSNicholas Bellinger { 67842bf829eSChristoph Hellwig struct pscsi_dev_virt *pdv = task->task_se_cmd->se_dev->dev_ptr; 679c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 680c66ac9dbSNicholas Bellinger int result; 681c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 682c66ac9dbSNicholas Bellinger unsigned char *cdb = &pt->pscsi_cdb[0]; 683c66ac9dbSNicholas Bellinger 684c66ac9dbSNicholas Bellinger result = pt->pscsi_result; 685c66ac9dbSNicholas Bellinger /* 686c66ac9dbSNicholas Bellinger * Hack to make sure that Write-Protect modepage is set if R/O mode is 687c66ac9dbSNicholas Bellinger * forced. 688c66ac9dbSNicholas Bellinger */ 689c66ac9dbSNicholas Bellinger if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && 690c66ac9dbSNicholas Bellinger (status_byte(result) << 1) == SAM_STAT_GOOD) { 691e3d6f909SAndy Grover if (!task->task_se_cmd->se_deve) 692c66ac9dbSNicholas Bellinger goto after_mode_sense; 693c66ac9dbSNicholas Bellinger 694e3d6f909SAndy Grover if (task->task_se_cmd->se_deve->lun_flags & 695c66ac9dbSNicholas Bellinger TRANSPORT_LUNFLAGS_READ_ONLY) { 6964949314cSAndy Grover unsigned char *buf = transport_kmap_data_sg(task->task_se_cmd); 697c66ac9dbSNicholas Bellinger 698c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SENSE_10) { 699c66ac9dbSNicholas Bellinger if (!(buf[3] & 0x80)) 700c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 701c66ac9dbSNicholas Bellinger } else { 702c66ac9dbSNicholas Bellinger if (!(buf[2] & 0x80)) 703c66ac9dbSNicholas Bellinger buf[2] |= 0x80; 704c66ac9dbSNicholas Bellinger } 70505d1c7c0SAndy Grover 7064949314cSAndy Grover transport_kunmap_data_sg(task->task_se_cmd); 707c66ac9dbSNicholas Bellinger } 708c66ac9dbSNicholas Bellinger } 709c66ac9dbSNicholas Bellinger after_mode_sense: 710c66ac9dbSNicholas Bellinger 711c66ac9dbSNicholas Bellinger if (sd->type != TYPE_TAPE) 712c66ac9dbSNicholas Bellinger goto after_mode_select; 713c66ac9dbSNicholas Bellinger 714c66ac9dbSNicholas Bellinger /* 715c66ac9dbSNicholas Bellinger * Hack to correctly obtain the initiator requested blocksize for 716c66ac9dbSNicholas Bellinger * TYPE_TAPE. Since this value is dependent upon each tape media, 717c66ac9dbSNicholas Bellinger * struct scsi_device->sector_size will not contain the correct value 718c66ac9dbSNicholas Bellinger * by default, so we go ahead and set it so 719c66ac9dbSNicholas Bellinger * TRANSPORT(dev)->get_blockdev() returns the correct value to the 720c66ac9dbSNicholas Bellinger * storage engine. 721c66ac9dbSNicholas Bellinger */ 722c66ac9dbSNicholas Bellinger if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && 723c66ac9dbSNicholas Bellinger (status_byte(result) << 1) == SAM_STAT_GOOD) { 724c66ac9dbSNicholas Bellinger unsigned char *buf; 725c66ac9dbSNicholas Bellinger struct scatterlist *sg = task->task_sg; 726c66ac9dbSNicholas Bellinger u16 bdl; 727c66ac9dbSNicholas Bellinger u32 blocksize; 728c66ac9dbSNicholas Bellinger 729c66ac9dbSNicholas Bellinger buf = sg_virt(&sg[0]); 7306708bb27SAndy Grover if (!buf) { 7316708bb27SAndy Grover pr_err("Unable to get buf for scatterlist\n"); 732c66ac9dbSNicholas Bellinger goto after_mode_select; 733c66ac9dbSNicholas Bellinger } 734c66ac9dbSNicholas Bellinger 735c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 736c66ac9dbSNicholas Bellinger bdl = (buf[3]); 737c66ac9dbSNicholas Bellinger else 738c66ac9dbSNicholas Bellinger bdl = (buf[6] << 8) | (buf[7]); 739c66ac9dbSNicholas Bellinger 740c66ac9dbSNicholas Bellinger if (!bdl) 741c66ac9dbSNicholas Bellinger goto after_mode_select; 742c66ac9dbSNicholas Bellinger 743c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 744c66ac9dbSNicholas Bellinger blocksize = (buf[9] << 16) | (buf[10] << 8) | 745c66ac9dbSNicholas Bellinger (buf[11]); 746c66ac9dbSNicholas Bellinger else 747c66ac9dbSNicholas Bellinger blocksize = (buf[13] << 16) | (buf[14] << 8) | 748c66ac9dbSNicholas Bellinger (buf[15]); 749c66ac9dbSNicholas Bellinger 750c66ac9dbSNicholas Bellinger sd->sector_size = blocksize; 751c66ac9dbSNicholas Bellinger } 752c66ac9dbSNicholas Bellinger after_mode_select: 753c66ac9dbSNicholas Bellinger 754c66ac9dbSNicholas Bellinger if (status_byte(result) & CHECK_CONDITION) 755c66ac9dbSNicholas Bellinger return 1; 756c66ac9dbSNicholas Bellinger 757c66ac9dbSNicholas Bellinger return 0; 758c66ac9dbSNicholas Bellinger } 759c66ac9dbSNicholas Bellinger 760c66ac9dbSNicholas Bellinger static struct se_task * 7616708bb27SAndy Grover pscsi_alloc_task(unsigned char *cdb) 762c66ac9dbSNicholas Bellinger { 763c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt; 764c66ac9dbSNicholas Bellinger 765c66ac9dbSNicholas Bellinger /* 7666708bb27SAndy Grover * Dynamically alloc cdb space, since it may be larger than 7676708bb27SAndy Grover * TCM_MAX_COMMAND_SIZE 768c66ac9dbSNicholas Bellinger */ 7696708bb27SAndy Grover pt = kzalloc(sizeof(*pt) + scsi_command_size(cdb), GFP_KERNEL); 7706708bb27SAndy Grover if (!pt) { 7716708bb27SAndy Grover pr_err("Unable to allocate struct pscsi_plugin_task\n"); 772c66ac9dbSNicholas Bellinger return NULL; 773c66ac9dbSNicholas Bellinger } 774c66ac9dbSNicholas Bellinger 775c66ac9dbSNicholas Bellinger return &pt->pscsi_task; 776c66ac9dbSNicholas Bellinger } 777c66ac9dbSNicholas Bellinger 778c66ac9dbSNicholas Bellinger static void pscsi_free_task(struct se_task *task) 779c66ac9dbSNicholas Bellinger { 780c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 781c66ac9dbSNicholas Bellinger 782c66ac9dbSNicholas Bellinger /* 783c66ac9dbSNicholas Bellinger * We do not release the bio(s) here associated with this task, as 784c66ac9dbSNicholas Bellinger * this is handled by bio_put() and pscsi_bi_endio(). 785c66ac9dbSNicholas Bellinger */ 786c66ac9dbSNicholas Bellinger kfree(pt); 787c66ac9dbSNicholas Bellinger } 788c66ac9dbSNicholas Bellinger 789c66ac9dbSNicholas Bellinger enum { 790c66ac9dbSNicholas Bellinger Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, 791c66ac9dbSNicholas Bellinger Opt_scsi_lun_id, Opt_err 792c66ac9dbSNicholas Bellinger }; 793c66ac9dbSNicholas Bellinger 794c66ac9dbSNicholas Bellinger static match_table_t tokens = { 795c66ac9dbSNicholas Bellinger {Opt_scsi_host_id, "scsi_host_id=%d"}, 796c66ac9dbSNicholas Bellinger {Opt_scsi_channel_id, "scsi_channel_id=%d"}, 797c66ac9dbSNicholas Bellinger {Opt_scsi_target_id, "scsi_target_id=%d"}, 798c66ac9dbSNicholas Bellinger {Opt_scsi_lun_id, "scsi_lun_id=%d"}, 799c66ac9dbSNicholas Bellinger {Opt_err, NULL} 800c66ac9dbSNicholas Bellinger }; 801c66ac9dbSNicholas Bellinger 802c66ac9dbSNicholas Bellinger static ssize_t pscsi_set_configfs_dev_params(struct se_hba *hba, 803c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 804c66ac9dbSNicholas Bellinger const char *page, 805c66ac9dbSNicholas Bellinger ssize_t count) 806c66ac9dbSNicholas Bellinger { 807c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; 808c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 809c66ac9dbSNicholas Bellinger char *orig, *ptr, *opts; 810c66ac9dbSNicholas Bellinger substring_t args[MAX_OPT_ARGS]; 811c66ac9dbSNicholas Bellinger int ret = 0, arg, token; 812c66ac9dbSNicholas Bellinger 813c66ac9dbSNicholas Bellinger opts = kstrdup(page, GFP_KERNEL); 814c66ac9dbSNicholas Bellinger if (!opts) 815c66ac9dbSNicholas Bellinger return -ENOMEM; 816c66ac9dbSNicholas Bellinger 817c66ac9dbSNicholas Bellinger orig = opts; 818c66ac9dbSNicholas Bellinger 81990c161b6SSebastian Andrzej Siewior while ((ptr = strsep(&opts, ",\n")) != NULL) { 820c66ac9dbSNicholas Bellinger if (!*ptr) 821c66ac9dbSNicholas Bellinger continue; 822c66ac9dbSNicholas Bellinger 823c66ac9dbSNicholas Bellinger token = match_token(ptr, tokens, args); 824c66ac9dbSNicholas Bellinger switch (token) { 825c66ac9dbSNicholas Bellinger case Opt_scsi_host_id: 826c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 8276708bb27SAndy Grover pr_err("PSCSI[%d]: Unable to accept" 828c66ac9dbSNicholas Bellinger " scsi_host_id while phv_mode ==" 829c66ac9dbSNicholas Bellinger " PHV_LLD_SCSI_HOST_NO\n", 830c66ac9dbSNicholas Bellinger phv->phv_host_id); 831c66ac9dbSNicholas Bellinger ret = -EINVAL; 832c66ac9dbSNicholas Bellinger goto out; 833c66ac9dbSNicholas Bellinger } 834c66ac9dbSNicholas Bellinger match_int(args, &arg); 835c66ac9dbSNicholas Bellinger pdv->pdv_host_id = arg; 8366708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Host ID:" 837c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_host_id); 838c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; 839c66ac9dbSNicholas Bellinger break; 840c66ac9dbSNicholas Bellinger case Opt_scsi_channel_id: 841c66ac9dbSNicholas Bellinger match_int(args, &arg); 842c66ac9dbSNicholas Bellinger pdv->pdv_channel_id = arg; 8436708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Channel" 844c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 845c66ac9dbSNicholas Bellinger pdv->pdv_channel_id); 846c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; 847c66ac9dbSNicholas Bellinger break; 848c66ac9dbSNicholas Bellinger case Opt_scsi_target_id: 849c66ac9dbSNicholas Bellinger match_int(args, &arg); 850c66ac9dbSNicholas Bellinger pdv->pdv_target_id = arg; 8516708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI Target" 852c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 853c66ac9dbSNicholas Bellinger pdv->pdv_target_id); 854c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_TARGET_ID; 855c66ac9dbSNicholas Bellinger break; 856c66ac9dbSNicholas Bellinger case Opt_scsi_lun_id: 857c66ac9dbSNicholas Bellinger match_int(args, &arg); 858c66ac9dbSNicholas Bellinger pdv->pdv_lun_id = arg; 8596708bb27SAndy Grover pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:" 860c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_lun_id); 861c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_LUN_ID; 862c66ac9dbSNicholas Bellinger break; 863c66ac9dbSNicholas Bellinger default: 864c66ac9dbSNicholas Bellinger break; 865c66ac9dbSNicholas Bellinger } 866c66ac9dbSNicholas Bellinger } 867c66ac9dbSNicholas Bellinger 868c66ac9dbSNicholas Bellinger out: 869c66ac9dbSNicholas Bellinger kfree(orig); 870c66ac9dbSNicholas Bellinger return (!ret) ? count : ret; 871c66ac9dbSNicholas Bellinger } 872c66ac9dbSNicholas Bellinger 873c66ac9dbSNicholas Bellinger static ssize_t pscsi_check_configfs_dev_params( 874c66ac9dbSNicholas Bellinger struct se_hba *hba, 875c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev) 876c66ac9dbSNicholas Bellinger { 877c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; 878c66ac9dbSNicholas Bellinger 879c66ac9dbSNicholas Bellinger if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || 880c66ac9dbSNicholas Bellinger !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || 881c66ac9dbSNicholas Bellinger !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { 8826708bb27SAndy Grover pr_err("Missing scsi_channel_id=, scsi_target_id= and" 883c66ac9dbSNicholas Bellinger " scsi_lun_id= parameters\n"); 884e3d6f909SAndy Grover return -EINVAL; 885c66ac9dbSNicholas Bellinger } 886c66ac9dbSNicholas Bellinger 887c66ac9dbSNicholas Bellinger return 0; 888c66ac9dbSNicholas Bellinger } 889c66ac9dbSNicholas Bellinger 890c66ac9dbSNicholas Bellinger static ssize_t pscsi_show_configfs_dev_params(struct se_hba *hba, 891c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 892c66ac9dbSNicholas Bellinger char *b) 893c66ac9dbSNicholas Bellinger { 894c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 895c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; 896c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 897c66ac9dbSNicholas Bellinger unsigned char host_id[16]; 898c66ac9dbSNicholas Bellinger ssize_t bl; 899c66ac9dbSNicholas Bellinger int i; 900c66ac9dbSNicholas Bellinger 901e6a8a41aSStefan Hajnoczi if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 902c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "%d", pdv->pdv_host_id); 903c66ac9dbSNicholas Bellinger else 904c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "PHBA Mode"); 905c66ac9dbSNicholas Bellinger 906c66ac9dbSNicholas Bellinger bl = sprintf(b, "SCSI Device Bus Location:" 907c66ac9dbSNicholas Bellinger " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", 908c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, 909c66ac9dbSNicholas Bellinger host_id); 910c66ac9dbSNicholas Bellinger 911c66ac9dbSNicholas Bellinger if (sd) { 912c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 913c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "Vendor: "); 914c66ac9dbSNicholas Bellinger for (i = 0; i < 8; i++) { 915c66ac9dbSNicholas Bellinger if (ISPRINT(sd->vendor[i])) /* printable character? */ 916c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->vendor[i]); 917c66ac9dbSNicholas Bellinger else 918c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 919c66ac9dbSNicholas Bellinger } 920c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Model: "); 921c66ac9dbSNicholas Bellinger for (i = 0; i < 16; i++) { 922c66ac9dbSNicholas Bellinger if (ISPRINT(sd->model[i])) /* printable character ? */ 923c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->model[i]); 924c66ac9dbSNicholas Bellinger else 925c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 926c66ac9dbSNicholas Bellinger } 927c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Rev: "); 928c66ac9dbSNicholas Bellinger for (i = 0; i < 4; i++) { 929c66ac9dbSNicholas Bellinger if (ISPRINT(sd->rev[i])) /* printable character ? */ 930c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->rev[i]); 931c66ac9dbSNicholas Bellinger else 932c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 933c66ac9dbSNicholas Bellinger } 934c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "\n"); 935c66ac9dbSNicholas Bellinger } 936c66ac9dbSNicholas Bellinger return bl; 937c66ac9dbSNicholas Bellinger } 938c66ac9dbSNicholas Bellinger 939c66ac9dbSNicholas Bellinger static void pscsi_bi_endio(struct bio *bio, int error) 940c66ac9dbSNicholas Bellinger { 941c66ac9dbSNicholas Bellinger bio_put(bio); 942c66ac9dbSNicholas Bellinger } 943c66ac9dbSNicholas Bellinger 944a1d8b49aSAndy Grover static inline struct bio *pscsi_get_bio(int sg_num) 945c66ac9dbSNicholas Bellinger { 946c66ac9dbSNicholas Bellinger struct bio *bio; 947c66ac9dbSNicholas Bellinger /* 948c66ac9dbSNicholas Bellinger * Use bio_malloc() following the comment in for bio -> struct request 949c66ac9dbSNicholas Bellinger * in block/blk-core.c:blk_make_request() 950c66ac9dbSNicholas Bellinger */ 951c66ac9dbSNicholas Bellinger bio = bio_kmalloc(GFP_KERNEL, sg_num); 9526708bb27SAndy Grover if (!bio) { 9536708bb27SAndy Grover pr_err("PSCSI: bio_kmalloc() failed\n"); 954c66ac9dbSNicholas Bellinger return NULL; 955c66ac9dbSNicholas Bellinger } 956c66ac9dbSNicholas Bellinger bio->bi_end_io = pscsi_bi_endio; 957c66ac9dbSNicholas Bellinger 958c66ac9dbSNicholas Bellinger return bio; 959c66ac9dbSNicholas Bellinger } 960c66ac9dbSNicholas Bellinger 96102b1a746SChristoph Hellwig static int pscsi_map_sg(struct se_task *task, struct scatterlist *task_sg, 96202b1a746SChristoph Hellwig struct bio **hbio) 963c66ac9dbSNicholas Bellinger { 96403e98c9eSNicholas Bellinger struct se_cmd *cmd = task->task_se_cmd; 96542bf829eSChristoph Hellwig struct pscsi_dev_virt *pdv = task->task_se_cmd->se_dev->dev_ptr; 96602b1a746SChristoph Hellwig u32 task_sg_num = task->task_sg_nents; 96702b1a746SChristoph Hellwig struct bio *bio = NULL, *tbio = NULL; 968c66ac9dbSNicholas Bellinger struct page *page; 969c66ac9dbSNicholas Bellinger struct scatterlist *sg; 970c66ac9dbSNicholas Bellinger u32 data_len = task->task_size, i, len, bytes, off; 971c66ac9dbSNicholas Bellinger int nr_pages = (task->task_size + task_sg[0].offset + 972c66ac9dbSNicholas Bellinger PAGE_SIZE - 1) >> PAGE_SHIFT; 97303e98c9eSNicholas Bellinger int nr_vecs = 0, rc; 974c66ac9dbSNicholas Bellinger int rw = (task->task_data_direction == DMA_TO_DEVICE); 975c66ac9dbSNicholas Bellinger 97602b1a746SChristoph Hellwig *hbio = NULL; 97702b1a746SChristoph Hellwig 9786708bb27SAndy Grover pr_debug("PSCSI: nr_pages: %d\n", nr_pages); 979c66ac9dbSNicholas Bellinger 980c66ac9dbSNicholas Bellinger for_each_sg(task_sg, sg, task_sg_num, i) { 981c66ac9dbSNicholas Bellinger page = sg_page(sg); 982c66ac9dbSNicholas Bellinger off = sg->offset; 983c66ac9dbSNicholas Bellinger len = sg->length; 984c66ac9dbSNicholas Bellinger 9856708bb27SAndy Grover pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i, 986c66ac9dbSNicholas Bellinger page, len, off); 987c66ac9dbSNicholas Bellinger 988c66ac9dbSNicholas Bellinger while (len > 0 && data_len > 0) { 989c66ac9dbSNicholas Bellinger bytes = min_t(unsigned int, len, PAGE_SIZE - off); 990c66ac9dbSNicholas Bellinger bytes = min(bytes, data_len); 991c66ac9dbSNicholas Bellinger 9926708bb27SAndy Grover if (!bio) { 993c66ac9dbSNicholas Bellinger nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); 994c66ac9dbSNicholas Bellinger nr_pages -= nr_vecs; 995c66ac9dbSNicholas Bellinger /* 996c66ac9dbSNicholas Bellinger * Calls bio_kmalloc() and sets bio->bi_end_io() 997c66ac9dbSNicholas Bellinger */ 998a1d8b49aSAndy Grover bio = pscsi_get_bio(nr_vecs); 9996708bb27SAndy Grover if (!bio) 1000c66ac9dbSNicholas Bellinger goto fail; 1001c66ac9dbSNicholas Bellinger 1002c66ac9dbSNicholas Bellinger if (rw) 1003c66ac9dbSNicholas Bellinger bio->bi_rw |= REQ_WRITE; 1004c66ac9dbSNicholas Bellinger 10056708bb27SAndy Grover pr_debug("PSCSI: Allocated bio: %p," 1006c66ac9dbSNicholas Bellinger " dir: %s nr_vecs: %d\n", bio, 1007c66ac9dbSNicholas Bellinger (rw) ? "rw" : "r", nr_vecs); 1008c66ac9dbSNicholas Bellinger /* 1009c66ac9dbSNicholas Bellinger * Set *hbio pointer to handle the case: 1010c66ac9dbSNicholas Bellinger * nr_pages > BIO_MAX_PAGES, where additional 1011c66ac9dbSNicholas Bellinger * bios need to be added to complete a given 1012c66ac9dbSNicholas Bellinger * struct se_task 1013c66ac9dbSNicholas Bellinger */ 101402b1a746SChristoph Hellwig if (!*hbio) 101502b1a746SChristoph Hellwig *hbio = tbio = bio; 1016c66ac9dbSNicholas Bellinger else 1017c66ac9dbSNicholas Bellinger tbio = tbio->bi_next = bio; 1018c66ac9dbSNicholas Bellinger } 1019c66ac9dbSNicholas Bellinger 10206708bb27SAndy Grover pr_debug("PSCSI: Calling bio_add_pc_page() i: %d" 1021c66ac9dbSNicholas Bellinger " bio: %p page: %p len: %d off: %d\n", i, bio, 1022c66ac9dbSNicholas Bellinger page, len, off); 1023c66ac9dbSNicholas Bellinger 1024c66ac9dbSNicholas Bellinger rc = bio_add_pc_page(pdv->pdv_sd->request_queue, 1025c66ac9dbSNicholas Bellinger bio, page, bytes, off); 1026c66ac9dbSNicholas Bellinger if (rc != bytes) 1027c66ac9dbSNicholas Bellinger goto fail; 1028c66ac9dbSNicholas Bellinger 10296708bb27SAndy Grover pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", 1030c66ac9dbSNicholas Bellinger bio->bi_vcnt, nr_vecs); 1031c66ac9dbSNicholas Bellinger 1032c66ac9dbSNicholas Bellinger if (bio->bi_vcnt > nr_vecs) { 10336708bb27SAndy Grover pr_debug("PSCSI: Reached bio->bi_vcnt max:" 1034c66ac9dbSNicholas Bellinger " %d i: %d bio: %p, allocating another" 1035c66ac9dbSNicholas Bellinger " bio\n", bio->bi_vcnt, i, bio); 1036c66ac9dbSNicholas Bellinger /* 1037c66ac9dbSNicholas Bellinger * Clear the pointer so that another bio will 1038c66ac9dbSNicholas Bellinger * be allocated with pscsi_get_bio() above, the 1039c66ac9dbSNicholas Bellinger * current bio has already been set *tbio and 1040c66ac9dbSNicholas Bellinger * bio->bi_next. 1041c66ac9dbSNicholas Bellinger */ 1042c66ac9dbSNicholas Bellinger bio = NULL; 1043c66ac9dbSNicholas Bellinger } 1044c66ac9dbSNicholas Bellinger 1045c66ac9dbSNicholas Bellinger page++; 1046c66ac9dbSNicholas Bellinger len -= bytes; 1047c66ac9dbSNicholas Bellinger data_len -= bytes; 1048c66ac9dbSNicholas Bellinger off = 0; 1049c66ac9dbSNicholas Bellinger } 1050c66ac9dbSNicholas Bellinger } 1051c66ac9dbSNicholas Bellinger 10526708bb27SAndy Grover return task->task_sg_nents; 1053c66ac9dbSNicholas Bellinger fail: 105402b1a746SChristoph Hellwig while (*hbio) { 105502b1a746SChristoph Hellwig bio = *hbio; 105602b1a746SChristoph Hellwig *hbio = (*hbio)->bi_next; 1057c66ac9dbSNicholas Bellinger bio->bi_next = NULL; 105802b1a746SChristoph Hellwig bio_endio(bio, 0); /* XXX: should be error */ 1059c66ac9dbSNicholas Bellinger } 106003e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 106103e98c9eSNicholas Bellinger return -ENOMEM; 1062c66ac9dbSNicholas Bellinger } 1063c66ac9dbSNicholas Bellinger 106402b1a746SChristoph Hellwig static int pscsi_do_task(struct se_task *task) 1065c66ac9dbSNicholas Bellinger { 106603e98c9eSNicholas Bellinger struct se_cmd *cmd = task->task_se_cmd; 106742bf829eSChristoph Hellwig struct pscsi_dev_virt *pdv = task->task_se_cmd->se_dev->dev_ptr; 106802b1a746SChristoph Hellwig struct pscsi_plugin_task *pt = PSCSI_TASK(task); 106902b1a746SChristoph Hellwig struct request *req; 107002b1a746SChristoph Hellwig struct bio *hbio; 1071c66ac9dbSNicholas Bellinger int ret; 1072c66ac9dbSNicholas Bellinger 1073485fd0d1SChristoph Hellwig target_get_task_cdb(task, pt->pscsi_cdb); 1074485fd0d1SChristoph Hellwig 107502b1a746SChristoph Hellwig if (task->task_se_cmd->se_cmd_flags & SCF_SCSI_NON_DATA_CDB) { 107602b1a746SChristoph Hellwig req = blk_get_request(pdv->pdv_sd->request_queue, 107702b1a746SChristoph Hellwig (task->task_data_direction == DMA_TO_DEVICE), 107802b1a746SChristoph Hellwig GFP_KERNEL); 107902b1a746SChristoph Hellwig if (!req || IS_ERR(req)) { 108002b1a746SChristoph Hellwig pr_err("PSCSI: blk_get_request() failed: %ld\n", 108102b1a746SChristoph Hellwig req ? IS_ERR(req) : -ENOMEM); 108203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = 108303e98c9eSNicholas Bellinger TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 108403e98c9eSNicholas Bellinger return -ENODEV; 108502b1a746SChristoph Hellwig } 108602b1a746SChristoph Hellwig } else { 108702b1a746SChristoph Hellwig BUG_ON(!task->task_size); 108802b1a746SChristoph Hellwig 1089c66ac9dbSNicholas Bellinger /* 1090c66ac9dbSNicholas Bellinger * Setup the main struct request for the task->task_sg[] payload 1091c66ac9dbSNicholas Bellinger */ 109202b1a746SChristoph Hellwig ret = pscsi_map_sg(task, task->task_sg, &hbio); 109303e98c9eSNicholas Bellinger if (ret < 0) { 109403e98c9eSNicholas Bellinger cmd->scsi_sense_reason = 109503e98c9eSNicholas Bellinger TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 109603e98c9eSNicholas Bellinger return ret; 109703e98c9eSNicholas Bellinger } 1098c66ac9dbSNicholas Bellinger 109902b1a746SChristoph Hellwig req = blk_make_request(pdv->pdv_sd->request_queue, hbio, 110002b1a746SChristoph Hellwig GFP_KERNEL); 1101ed327ed3SDan Carpenter if (IS_ERR(req)) { 110202b1a746SChristoph Hellwig pr_err("pSCSI: blk_make_request() failed\n"); 110302b1a746SChristoph Hellwig goto fail; 110402b1a746SChristoph Hellwig } 110502b1a746SChristoph Hellwig } 110602b1a746SChristoph Hellwig 110702b1a746SChristoph Hellwig req->cmd_type = REQ_TYPE_BLOCK_PC; 110802b1a746SChristoph Hellwig req->end_io = pscsi_req_done; 110902b1a746SChristoph Hellwig req->end_io_data = task; 111002b1a746SChristoph Hellwig req->cmd_len = scsi_command_size(pt->pscsi_cdb); 111102b1a746SChristoph Hellwig req->cmd = &pt->pscsi_cdb[0]; 111202b1a746SChristoph Hellwig req->sense = &pt->pscsi_sense[0]; 111302b1a746SChristoph Hellwig req->sense_len = 0; 111402b1a746SChristoph Hellwig if (pdv->pdv_sd->type == TYPE_DISK) 111502b1a746SChristoph Hellwig req->timeout = PS_TIMEOUT_DISK; 111602b1a746SChristoph Hellwig else 111702b1a746SChristoph Hellwig req->timeout = PS_TIMEOUT_OTHER; 111802b1a746SChristoph Hellwig req->retries = PS_RETRY; 111902b1a746SChristoph Hellwig 112002b1a746SChristoph Hellwig blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, 112102b1a746SChristoph Hellwig (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG), 112202b1a746SChristoph Hellwig pscsi_req_done); 112302b1a746SChristoph Hellwig 112403e98c9eSNicholas Bellinger return 0; 112502b1a746SChristoph Hellwig 112602b1a746SChristoph Hellwig fail: 112702b1a746SChristoph Hellwig while (hbio) { 112802b1a746SChristoph Hellwig struct bio *bio = hbio; 112902b1a746SChristoph Hellwig hbio = hbio->bi_next; 113002b1a746SChristoph Hellwig bio->bi_next = NULL; 113102b1a746SChristoph Hellwig bio_endio(bio, 0); /* XXX: should be error */ 113202b1a746SChristoph Hellwig } 113303e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 113403e98c9eSNicholas Bellinger return -ENOMEM; 113502b1a746SChristoph Hellwig } 113602b1a746SChristoph Hellwig 1137c66ac9dbSNicholas Bellinger /* pscsi_get_sense_buffer(): 1138c66ac9dbSNicholas Bellinger * 1139c66ac9dbSNicholas Bellinger * 1140c66ac9dbSNicholas Bellinger */ 1141c66ac9dbSNicholas Bellinger static unsigned char *pscsi_get_sense_buffer(struct se_task *task) 1142c66ac9dbSNicholas Bellinger { 1143c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 1144c66ac9dbSNicholas Bellinger 11458359cf43SJörn Engel return pt->pscsi_sense; 1146c66ac9dbSNicholas Bellinger } 1147c66ac9dbSNicholas Bellinger 1148c66ac9dbSNicholas Bellinger /* pscsi_get_device_rev(): 1149c66ac9dbSNicholas Bellinger * 1150c66ac9dbSNicholas Bellinger * 1151c66ac9dbSNicholas Bellinger */ 1152c66ac9dbSNicholas Bellinger static u32 pscsi_get_device_rev(struct se_device *dev) 1153c66ac9dbSNicholas Bellinger { 1154c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = dev->dev_ptr; 1155c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 1156c66ac9dbSNicholas Bellinger 1157c66ac9dbSNicholas Bellinger return (sd->scsi_level - 1) ? sd->scsi_level - 1 : 1; 1158c66ac9dbSNicholas Bellinger } 1159c66ac9dbSNicholas Bellinger 1160c66ac9dbSNicholas Bellinger /* pscsi_get_device_type(): 1161c66ac9dbSNicholas Bellinger * 1162c66ac9dbSNicholas Bellinger * 1163c66ac9dbSNicholas Bellinger */ 1164c66ac9dbSNicholas Bellinger static u32 pscsi_get_device_type(struct se_device *dev) 1165c66ac9dbSNicholas Bellinger { 1166c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = dev->dev_ptr; 1167c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 1168c66ac9dbSNicholas Bellinger 1169c66ac9dbSNicholas Bellinger return sd->type; 1170c66ac9dbSNicholas Bellinger } 1171c66ac9dbSNicholas Bellinger 1172c66ac9dbSNicholas Bellinger static sector_t pscsi_get_blocks(struct se_device *dev) 1173c66ac9dbSNicholas Bellinger { 1174c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = dev->dev_ptr; 1175c66ac9dbSNicholas Bellinger 1176c66ac9dbSNicholas Bellinger if (pdv->pdv_bd && pdv->pdv_bd->bd_part) 1177c66ac9dbSNicholas Bellinger return pdv->pdv_bd->bd_part->nr_sects; 1178c66ac9dbSNicholas Bellinger 1179c66ac9dbSNicholas Bellinger dump_stack(); 1180c66ac9dbSNicholas Bellinger return 0; 1181c66ac9dbSNicholas Bellinger } 1182c66ac9dbSNicholas Bellinger 1183c66ac9dbSNicholas Bellinger /* pscsi_handle_SAM_STATUS_failures(): 1184c66ac9dbSNicholas Bellinger * 1185c66ac9dbSNicholas Bellinger * 1186c66ac9dbSNicholas Bellinger */ 1187c66ac9dbSNicholas Bellinger static inline void pscsi_process_SAM_status( 1188c66ac9dbSNicholas Bellinger struct se_task *task, 1189c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt) 1190c66ac9dbSNicholas Bellinger { 1191c66ac9dbSNicholas Bellinger task->task_scsi_status = status_byte(pt->pscsi_result); 11926708bb27SAndy Grover if (task->task_scsi_status) { 1193c66ac9dbSNicholas Bellinger task->task_scsi_status <<= 1; 11946708bb27SAndy Grover pr_debug("PSCSI Status Byte exception at task: %p CDB:" 1195c66ac9dbSNicholas Bellinger " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0], 1196c66ac9dbSNicholas Bellinger pt->pscsi_result); 1197c66ac9dbSNicholas Bellinger } 1198c66ac9dbSNicholas Bellinger 1199c66ac9dbSNicholas Bellinger switch (host_byte(pt->pscsi_result)) { 1200c66ac9dbSNicholas Bellinger case DID_OK: 1201c66ac9dbSNicholas Bellinger transport_complete_task(task, (!task->task_scsi_status)); 1202c66ac9dbSNicholas Bellinger break; 1203c66ac9dbSNicholas Bellinger default: 12046708bb27SAndy Grover pr_debug("PSCSI Host Byte exception at task: %p CDB:" 1205c66ac9dbSNicholas Bellinger " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0], 1206c66ac9dbSNicholas Bellinger pt->pscsi_result); 1207c66ac9dbSNicholas Bellinger task->task_scsi_status = SAM_STAT_CHECK_CONDITION; 120803e98c9eSNicholas Bellinger task->task_se_cmd->scsi_sense_reason = 120903e98c9eSNicholas Bellinger TCM_UNSUPPORTED_SCSI_OPCODE; 1210c66ac9dbSNicholas Bellinger transport_complete_task(task, 0); 1211c66ac9dbSNicholas Bellinger break; 1212c66ac9dbSNicholas Bellinger } 1213c66ac9dbSNicholas Bellinger } 1214c66ac9dbSNicholas Bellinger 1215c66ac9dbSNicholas Bellinger static void pscsi_req_done(struct request *req, int uptodate) 1216c66ac9dbSNicholas Bellinger { 1217c66ac9dbSNicholas Bellinger struct se_task *task = req->end_io_data; 1218c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 1219c66ac9dbSNicholas Bellinger 1220c66ac9dbSNicholas Bellinger pt->pscsi_result = req->errors; 1221c66ac9dbSNicholas Bellinger pt->pscsi_resid = req->resid_len; 1222c66ac9dbSNicholas Bellinger 1223c66ac9dbSNicholas Bellinger pscsi_process_SAM_status(task, pt); 1224c66ac9dbSNicholas Bellinger __blk_put_request(req->q, req); 1225c66ac9dbSNicholas Bellinger } 1226c66ac9dbSNicholas Bellinger 1227c66ac9dbSNicholas Bellinger static struct se_subsystem_api pscsi_template = { 1228c66ac9dbSNicholas Bellinger .name = "pscsi", 1229c66ac9dbSNicholas Bellinger .owner = THIS_MODULE, 1230c66ac9dbSNicholas Bellinger .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV, 1231c66ac9dbSNicholas Bellinger .attach_hba = pscsi_attach_hba, 1232c66ac9dbSNicholas Bellinger .detach_hba = pscsi_detach_hba, 1233c66ac9dbSNicholas Bellinger .pmode_enable_hba = pscsi_pmode_enable_hba, 1234c66ac9dbSNicholas Bellinger .allocate_virtdevice = pscsi_allocate_virtdevice, 1235c66ac9dbSNicholas Bellinger .create_virtdevice = pscsi_create_virtdevice, 1236c66ac9dbSNicholas Bellinger .free_device = pscsi_free_device, 1237c66ac9dbSNicholas Bellinger .transport_complete = pscsi_transport_complete, 1238c66ac9dbSNicholas Bellinger .alloc_task = pscsi_alloc_task, 1239c66ac9dbSNicholas Bellinger .do_task = pscsi_do_task, 1240c66ac9dbSNicholas Bellinger .free_task = pscsi_free_task, 1241c66ac9dbSNicholas Bellinger .check_configfs_dev_params = pscsi_check_configfs_dev_params, 1242c66ac9dbSNicholas Bellinger .set_configfs_dev_params = pscsi_set_configfs_dev_params, 1243c66ac9dbSNicholas Bellinger .show_configfs_dev_params = pscsi_show_configfs_dev_params, 1244c66ac9dbSNicholas Bellinger .get_sense_buffer = pscsi_get_sense_buffer, 1245c66ac9dbSNicholas Bellinger .get_device_rev = pscsi_get_device_rev, 1246c66ac9dbSNicholas Bellinger .get_device_type = pscsi_get_device_type, 1247c66ac9dbSNicholas Bellinger .get_blocks = pscsi_get_blocks, 1248c66ac9dbSNicholas Bellinger }; 1249c66ac9dbSNicholas Bellinger 1250c66ac9dbSNicholas Bellinger static int __init pscsi_module_init(void) 1251c66ac9dbSNicholas Bellinger { 1252c66ac9dbSNicholas Bellinger return transport_subsystem_register(&pscsi_template); 1253c66ac9dbSNicholas Bellinger } 1254c66ac9dbSNicholas Bellinger 1255c66ac9dbSNicholas Bellinger static void pscsi_module_exit(void) 1256c66ac9dbSNicholas Bellinger { 1257c66ac9dbSNicholas Bellinger transport_subsystem_release(&pscsi_template); 1258c66ac9dbSNicholas Bellinger } 1259c66ac9dbSNicholas Bellinger 1260c66ac9dbSNicholas Bellinger MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); 1261c66ac9dbSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 1262c66ac9dbSNicholas Bellinger MODULE_LICENSE("GPL"); 1263c66ac9dbSNicholas Bellinger 1264c66ac9dbSNicholas Bellinger module_init(pscsi_module_init); 1265c66ac9dbSNicholas Bellinger module_exit(pscsi_module_exit); 1266