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/version.h> 30c66ac9dbSNicholas Bellinger #include <linux/string.h> 31c66ac9dbSNicholas Bellinger #include <linux/parser.h> 32c66ac9dbSNicholas Bellinger #include <linux/timer.h> 33c66ac9dbSNicholas Bellinger #include <linux/blkdev.h> 34c66ac9dbSNicholas Bellinger #include <linux/blk_types.h> 35c66ac9dbSNicholas Bellinger #include <linux/slab.h> 36c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 37c66ac9dbSNicholas Bellinger #include <linux/genhd.h> 38c66ac9dbSNicholas Bellinger #include <linux/cdrom.h> 39c66ac9dbSNicholas Bellinger #include <linux/file.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> 47c66ac9dbSNicholas Bellinger #include <target/target_core_device.h> 48c66ac9dbSNicholas Bellinger #include <target/target_core_transport.h> 49c66ac9dbSNicholas Bellinger 50c66ac9dbSNicholas Bellinger #include "target_core_pscsi.h" 51c66ac9dbSNicholas Bellinger 52c66ac9dbSNicholas Bellinger #define ISPRINT(a) ((a >= ' ') && (a <= '~')) 53c66ac9dbSNicholas Bellinger 54c66ac9dbSNicholas Bellinger static struct se_subsystem_api pscsi_template; 55c66ac9dbSNicholas Bellinger 56c66ac9dbSNicholas Bellinger static void pscsi_req_done(struct request *, int); 57c66ac9dbSNicholas Bellinger 58c66ac9dbSNicholas Bellinger /* pscsi_attach_hba(): 59c66ac9dbSNicholas Bellinger * 60c66ac9dbSNicholas Bellinger * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. 61c66ac9dbSNicholas Bellinger * from the passed SCSI Host ID. 62c66ac9dbSNicholas Bellinger */ 63c66ac9dbSNicholas Bellinger static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) 64c66ac9dbSNicholas Bellinger { 65c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv; 66c66ac9dbSNicholas Bellinger 67c66ac9dbSNicholas Bellinger phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); 68c66ac9dbSNicholas Bellinger if (!(phv)) { 69c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate struct pscsi_hba_virt\n"); 70e3d6f909SAndy Grover return -ENOMEM; 71c66ac9dbSNicholas Bellinger } 72c66ac9dbSNicholas Bellinger phv->phv_host_id = host_id; 73c66ac9dbSNicholas Bellinger phv->phv_mode = PHV_VIRUTAL_HOST_ID; 74c66ac9dbSNicholas Bellinger 755951146dSAndy Grover hba->hba_ptr = phv; 76c66ac9dbSNicholas Bellinger 77c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_HBA[%d] - TCM SCSI HBA Driver %s on" 78c66ac9dbSNicholas Bellinger " Generic Target Core Stack %s\n", hba->hba_id, 79c66ac9dbSNicholas Bellinger PSCSI_VERSION, TARGET_CORE_MOD_VERSION); 80e3d6f909SAndy Grover printk(KERN_INFO "CORE_HBA[%d] - Attached SCSI HBA to Generic\n", 81e3d6f909SAndy Grover hba->hba_id); 82c66ac9dbSNicholas Bellinger 83c66ac9dbSNicholas Bellinger return 0; 84c66ac9dbSNicholas Bellinger } 85c66ac9dbSNicholas Bellinger 86c66ac9dbSNicholas Bellinger static void pscsi_detach_hba(struct se_hba *hba) 87c66ac9dbSNicholas Bellinger { 88c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 89c66ac9dbSNicholas Bellinger struct Scsi_Host *scsi_host = phv->phv_lld_host; 90c66ac9dbSNicholas Bellinger 91c66ac9dbSNicholas Bellinger if (scsi_host) { 92c66ac9dbSNicholas Bellinger scsi_host_put(scsi_host); 93c66ac9dbSNicholas Bellinger 94c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_HBA[%d] - Detached SCSI HBA: %s from" 95c66ac9dbSNicholas Bellinger " Generic Target Core\n", hba->hba_id, 96c66ac9dbSNicholas Bellinger (scsi_host->hostt->name) ? (scsi_host->hostt->name) : 97c66ac9dbSNicholas Bellinger "Unknown"); 98c66ac9dbSNicholas Bellinger } else 99c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_HBA[%d] - Detached Virtual SCSI HBA" 100c66ac9dbSNicholas Bellinger " from Generic Target Core\n", hba->hba_id); 101c66ac9dbSNicholas Bellinger 102c66ac9dbSNicholas Bellinger kfree(phv); 103c66ac9dbSNicholas Bellinger hba->hba_ptr = NULL; 104c66ac9dbSNicholas Bellinger } 105c66ac9dbSNicholas Bellinger 106c66ac9dbSNicholas Bellinger static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) 107c66ac9dbSNicholas Bellinger { 108c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)hba->hba_ptr; 109c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 110c66ac9dbSNicholas Bellinger /* 111c66ac9dbSNicholas Bellinger * Release the struct Scsi_Host 112c66ac9dbSNicholas Bellinger */ 113c66ac9dbSNicholas Bellinger if (!(mode_flag)) { 114c66ac9dbSNicholas Bellinger if (!(sh)) 115c66ac9dbSNicholas Bellinger return 0; 116c66ac9dbSNicholas Bellinger 117c66ac9dbSNicholas Bellinger phv->phv_lld_host = NULL; 118c66ac9dbSNicholas Bellinger phv->phv_mode = PHV_VIRUTAL_HOST_ID; 119c66ac9dbSNicholas Bellinger 120c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" 121c66ac9dbSNicholas Bellinger " %s\n", hba->hba_id, (sh->hostt->name) ? 122c66ac9dbSNicholas Bellinger (sh->hostt->name) : "Unknown"); 123c66ac9dbSNicholas Bellinger 124c66ac9dbSNicholas Bellinger scsi_host_put(sh); 125c66ac9dbSNicholas Bellinger return 0; 126c66ac9dbSNicholas Bellinger } 127c66ac9dbSNicholas Bellinger /* 128c66ac9dbSNicholas Bellinger * Otherwise, locate struct Scsi_Host from the original passed 129c66ac9dbSNicholas Bellinger * pSCSI Host ID and enable for phba mode 130c66ac9dbSNicholas Bellinger */ 131e3d6f909SAndy Grover sh = scsi_host_lookup(phv->phv_host_id); 132e3d6f909SAndy Grover if (IS_ERR(sh)) { 133c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: Unable to locate SCSI Host for" 134c66ac9dbSNicholas Bellinger " phv_host_id: %d\n", phv->phv_host_id); 135e3d6f909SAndy Grover return PTR_ERR(sh); 136c66ac9dbSNicholas Bellinger } 137c66ac9dbSNicholas Bellinger 138c66ac9dbSNicholas Bellinger phv->phv_lld_host = sh; 139c66ac9dbSNicholas Bellinger phv->phv_mode = PHV_LLD_SCSI_HOST_NO; 140c66ac9dbSNicholas Bellinger 141c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", 142c66ac9dbSNicholas Bellinger hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); 143c66ac9dbSNicholas Bellinger 144c66ac9dbSNicholas Bellinger return 1; 145c66ac9dbSNicholas Bellinger } 146c66ac9dbSNicholas Bellinger 147c66ac9dbSNicholas Bellinger static void pscsi_tape_read_blocksize(struct se_device *dev, 148c66ac9dbSNicholas Bellinger struct scsi_device *sdev) 149c66ac9dbSNicholas Bellinger { 150c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 151c66ac9dbSNicholas Bellinger int ret; 152c66ac9dbSNicholas Bellinger 153c66ac9dbSNicholas Bellinger buf = kzalloc(12, GFP_KERNEL); 154c66ac9dbSNicholas Bellinger if (!buf) 155c66ac9dbSNicholas Bellinger return; 156c66ac9dbSNicholas Bellinger 157c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 158c66ac9dbSNicholas Bellinger cdb[0] = MODE_SENSE; 159c66ac9dbSNicholas Bellinger cdb[4] = 0x0c; /* 12 bytes */ 160c66ac9dbSNicholas Bellinger 161c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, 162c66ac9dbSNicholas Bellinger HZ, 1, NULL); 163c66ac9dbSNicholas Bellinger if (ret) 164c66ac9dbSNicholas Bellinger goto out_free; 165c66ac9dbSNicholas Bellinger 166c66ac9dbSNicholas Bellinger /* 167c66ac9dbSNicholas Bellinger * If MODE_SENSE still returns zero, set the default value to 1024. 168c66ac9dbSNicholas Bellinger */ 169c66ac9dbSNicholas Bellinger sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); 170c66ac9dbSNicholas Bellinger if (!sdev->sector_size) 171c66ac9dbSNicholas Bellinger sdev->sector_size = 1024; 172c66ac9dbSNicholas Bellinger out_free: 173c66ac9dbSNicholas Bellinger kfree(buf); 174c66ac9dbSNicholas Bellinger } 175c66ac9dbSNicholas Bellinger 176c66ac9dbSNicholas Bellinger static void 177c66ac9dbSNicholas Bellinger pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) 178c66ac9dbSNicholas Bellinger { 179c66ac9dbSNicholas Bellinger unsigned char *buf; 180c66ac9dbSNicholas Bellinger 181c66ac9dbSNicholas Bellinger if (sdev->inquiry_len < INQUIRY_LEN) 182c66ac9dbSNicholas Bellinger return; 183c66ac9dbSNicholas Bellinger 184c66ac9dbSNicholas Bellinger buf = sdev->inquiry; 185c66ac9dbSNicholas Bellinger if (!buf) 186c66ac9dbSNicholas Bellinger return; 187c66ac9dbSNicholas Bellinger /* 188c66ac9dbSNicholas Bellinger * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() 189c66ac9dbSNicholas Bellinger */ 190c66ac9dbSNicholas Bellinger memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); 191c66ac9dbSNicholas Bellinger memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); 192c66ac9dbSNicholas Bellinger memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); 193c66ac9dbSNicholas Bellinger } 194c66ac9dbSNicholas Bellinger 195c66ac9dbSNicholas Bellinger static int 196c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) 197c66ac9dbSNicholas Bellinger { 198c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 199c66ac9dbSNicholas Bellinger int ret; 200c66ac9dbSNicholas Bellinger 201c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 202c66ac9dbSNicholas Bellinger if (!buf) 203e3d6f909SAndy Grover return -ENOMEM; 204c66ac9dbSNicholas Bellinger 205c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 206c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 207c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 208c66ac9dbSNicholas Bellinger cdb[2] = 0x80; /* Unit Serial Number */ 209c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; 210c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); 211c66ac9dbSNicholas Bellinger 212c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 213c66ac9dbSNicholas Bellinger INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); 214c66ac9dbSNicholas Bellinger if (ret) 215c66ac9dbSNicholas Bellinger goto out_free; 216c66ac9dbSNicholas Bellinger 217c66ac9dbSNicholas Bellinger snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); 218c66ac9dbSNicholas Bellinger 219c66ac9dbSNicholas Bellinger wwn->t10_sub_dev->su_dev_flags |= SDF_FIRMWARE_VPD_UNIT_SERIAL; 220c66ac9dbSNicholas Bellinger 221c66ac9dbSNicholas Bellinger kfree(buf); 222c66ac9dbSNicholas Bellinger return 0; 223c66ac9dbSNicholas Bellinger 224c66ac9dbSNicholas Bellinger out_free: 225c66ac9dbSNicholas Bellinger kfree(buf); 226e3d6f909SAndy Grover return -EPERM; 227c66ac9dbSNicholas Bellinger } 228c66ac9dbSNicholas Bellinger 229c66ac9dbSNicholas Bellinger static void 230c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, 231c66ac9dbSNicholas Bellinger struct t10_wwn *wwn) 232c66ac9dbSNicholas Bellinger { 233c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; 234c66ac9dbSNicholas Bellinger int ident_len, page_len, off = 4, ret; 235c66ac9dbSNicholas Bellinger struct t10_vpd *vpd; 236c66ac9dbSNicholas Bellinger 237c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 238c66ac9dbSNicholas Bellinger if (!buf) 239c66ac9dbSNicholas Bellinger return; 240c66ac9dbSNicholas Bellinger 241c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 242c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 243c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 244c66ac9dbSNicholas Bellinger cdb[2] = 0x83; /* Device Identifier */ 245c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; 246c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); 247c66ac9dbSNicholas Bellinger 248c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 249c66ac9dbSNicholas Bellinger INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, 250c66ac9dbSNicholas Bellinger NULL, HZ, 1, NULL); 251c66ac9dbSNicholas Bellinger if (ret) 252c66ac9dbSNicholas Bellinger goto out; 253c66ac9dbSNicholas Bellinger 254c66ac9dbSNicholas Bellinger page_len = (buf[2] << 8) | buf[3]; 255c66ac9dbSNicholas Bellinger while (page_len > 0) { 256c66ac9dbSNicholas Bellinger /* Grab a pointer to the Identification descriptor */ 257c66ac9dbSNicholas Bellinger page_83 = &buf[off]; 258c66ac9dbSNicholas Bellinger ident_len = page_83[3]; 259c66ac9dbSNicholas Bellinger if (!ident_len) { 260c66ac9dbSNicholas Bellinger printk(KERN_ERR "page_83[3]: identifier" 261c66ac9dbSNicholas Bellinger " length zero!\n"); 262c66ac9dbSNicholas Bellinger break; 263c66ac9dbSNicholas Bellinger } 264c66ac9dbSNicholas Bellinger printk(KERN_INFO "T10 VPD Identifer Length: %d\n", ident_len); 265c66ac9dbSNicholas Bellinger 266c66ac9dbSNicholas Bellinger vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); 267c66ac9dbSNicholas Bellinger if (!vpd) { 268c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate memory for" 269c66ac9dbSNicholas Bellinger " struct t10_vpd\n"); 270c66ac9dbSNicholas Bellinger goto out; 271c66ac9dbSNicholas Bellinger } 272c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&vpd->vpd_list); 273c66ac9dbSNicholas Bellinger 274c66ac9dbSNicholas Bellinger transport_set_vpd_proto_id(vpd, page_83); 275c66ac9dbSNicholas Bellinger transport_set_vpd_assoc(vpd, page_83); 276c66ac9dbSNicholas Bellinger 277c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident_type(vpd, page_83) < 0) { 278c66ac9dbSNicholas Bellinger off += (ident_len + 4); 279c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 280c66ac9dbSNicholas Bellinger kfree(vpd); 281c66ac9dbSNicholas Bellinger continue; 282c66ac9dbSNicholas Bellinger } 283c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident(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 290c66ac9dbSNicholas Bellinger list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); 291c66ac9dbSNicholas Bellinger off += (ident_len + 4); 292c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 293c66ac9dbSNicholas Bellinger } 294c66ac9dbSNicholas Bellinger 295c66ac9dbSNicholas Bellinger out: 296c66ac9dbSNicholas Bellinger kfree(buf); 297c66ac9dbSNicholas Bellinger } 298c66ac9dbSNicholas Bellinger 299c66ac9dbSNicholas Bellinger /* pscsi_add_device_to_list(): 300c66ac9dbSNicholas Bellinger * 301c66ac9dbSNicholas Bellinger * 302c66ac9dbSNicholas Bellinger */ 303c66ac9dbSNicholas Bellinger static struct se_device *pscsi_add_device_to_list( 304c66ac9dbSNicholas Bellinger struct se_hba *hba, 305c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 306c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 307c66ac9dbSNicholas Bellinger struct scsi_device *sd, 308c66ac9dbSNicholas Bellinger int dev_flags) 309c66ac9dbSNicholas Bellinger { 310c66ac9dbSNicholas Bellinger struct se_device *dev; 311c66ac9dbSNicholas Bellinger struct se_dev_limits dev_limits; 312c66ac9dbSNicholas Bellinger struct request_queue *q; 313c66ac9dbSNicholas Bellinger struct queue_limits *limits; 314c66ac9dbSNicholas Bellinger 315c66ac9dbSNicholas Bellinger memset(&dev_limits, 0, sizeof(struct se_dev_limits)); 316c66ac9dbSNicholas Bellinger 317c66ac9dbSNicholas Bellinger if (!sd->queue_depth) { 318c66ac9dbSNicholas Bellinger sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; 319c66ac9dbSNicholas Bellinger 320c66ac9dbSNicholas Bellinger printk(KERN_ERR "Set broken SCSI Device %d:%d:%d" 321c66ac9dbSNicholas Bellinger " queue_depth to %d\n", sd->channel, sd->id, 322c66ac9dbSNicholas Bellinger sd->lun, sd->queue_depth); 323c66ac9dbSNicholas Bellinger } 324c66ac9dbSNicholas Bellinger /* 325c66ac9dbSNicholas Bellinger * Setup the local scope queue_limits from struct request_queue->limits 326c66ac9dbSNicholas Bellinger * to pass into transport_add_device_to_core_hba() as struct se_dev_limits. 327c66ac9dbSNicholas Bellinger */ 328c66ac9dbSNicholas Bellinger q = sd->request_queue; 329c66ac9dbSNicholas Bellinger limits = &dev_limits.limits; 330c66ac9dbSNicholas Bellinger limits->logical_block_size = sd->sector_size; 331a1d8b49aSAndy Grover limits->max_hw_sectors = min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q)); 332a1d8b49aSAndy Grover limits->max_sectors = min_t(int, sd->host->max_sectors, queue_max_sectors(q)); 333c66ac9dbSNicholas Bellinger dev_limits.hw_queue_depth = sd->queue_depth; 334c66ac9dbSNicholas Bellinger dev_limits.queue_depth = sd->queue_depth; 335c66ac9dbSNicholas Bellinger /* 336c66ac9dbSNicholas Bellinger * Setup our standard INQUIRY info into se_dev->t10_wwn 337c66ac9dbSNicholas Bellinger */ 338c66ac9dbSNicholas Bellinger pscsi_set_inquiry_info(sd, &se_dev->t10_wwn); 339c66ac9dbSNicholas Bellinger 340c66ac9dbSNicholas Bellinger /* 341c66ac9dbSNicholas Bellinger * Set the pointer pdv->pdv_sd to from passed struct scsi_device, 342c66ac9dbSNicholas Bellinger * which has already been referenced with Linux SCSI code with 343c66ac9dbSNicholas Bellinger * scsi_device_get() in this file's pscsi_create_virtdevice(). 344c66ac9dbSNicholas Bellinger * 345c66ac9dbSNicholas Bellinger * The passthrough operations called by the transport_add_device_* 346c66ac9dbSNicholas Bellinger * function below will require this pointer to be set for passthroug 347c66ac9dbSNicholas Bellinger * ops. 348c66ac9dbSNicholas Bellinger * 349c66ac9dbSNicholas Bellinger * For the shutdown case in pscsi_free_device(), this struct 350c66ac9dbSNicholas Bellinger * scsi_device reference is released with Linux SCSI code 351c66ac9dbSNicholas Bellinger * scsi_device_put() and the pdv->pdv_sd cleared. 352c66ac9dbSNicholas Bellinger */ 353c66ac9dbSNicholas Bellinger pdv->pdv_sd = sd; 354c66ac9dbSNicholas Bellinger 355c66ac9dbSNicholas Bellinger dev = transport_add_device_to_core_hba(hba, &pscsi_template, 3565951146dSAndy Grover se_dev, dev_flags, pdv, 357c66ac9dbSNicholas Bellinger &dev_limits, NULL, NULL); 358c66ac9dbSNicholas Bellinger if (!(dev)) { 359c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 360c66ac9dbSNicholas Bellinger return NULL; 361c66ac9dbSNicholas Bellinger } 362c66ac9dbSNicholas Bellinger 363c66ac9dbSNicholas Bellinger /* 364c66ac9dbSNicholas Bellinger * Locate VPD WWN Information used for various purposes within 365c66ac9dbSNicholas Bellinger * the Storage Engine. 366c66ac9dbSNicholas Bellinger */ 367c66ac9dbSNicholas Bellinger if (!pscsi_get_inquiry_vpd_serial(sd, &se_dev->t10_wwn)) { 368c66ac9dbSNicholas Bellinger /* 369c66ac9dbSNicholas Bellinger * If VPD Unit Serial returned GOOD status, try 370c66ac9dbSNicholas Bellinger * VPD Device Identification page (0x83). 371c66ac9dbSNicholas Bellinger */ 372c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_device_ident(sd, &se_dev->t10_wwn); 373c66ac9dbSNicholas Bellinger } 374c66ac9dbSNicholas Bellinger 375c66ac9dbSNicholas Bellinger /* 376c66ac9dbSNicholas Bellinger * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. 377c66ac9dbSNicholas Bellinger */ 378c66ac9dbSNicholas Bellinger if (sd->type == TYPE_TAPE) 379c66ac9dbSNicholas Bellinger pscsi_tape_read_blocksize(dev, sd); 380c66ac9dbSNicholas Bellinger return dev; 381c66ac9dbSNicholas Bellinger } 382c66ac9dbSNicholas Bellinger 383c66ac9dbSNicholas Bellinger static void *pscsi_allocate_virtdevice(struct se_hba *hba, const char *name) 384c66ac9dbSNicholas Bellinger { 385c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv; 386c66ac9dbSNicholas Bellinger 387c66ac9dbSNicholas Bellinger pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); 388c66ac9dbSNicholas Bellinger if (!(pdv)) { 389c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate memory for struct pscsi_dev_virt\n"); 390c66ac9dbSNicholas Bellinger return NULL; 391c66ac9dbSNicholas Bellinger } 392c66ac9dbSNicholas Bellinger pdv->pdv_se_hba = hba; 393c66ac9dbSNicholas Bellinger 394c66ac9dbSNicholas Bellinger printk(KERN_INFO "PSCSI: Allocated pdv: %p for %s\n", pdv, name); 3955951146dSAndy Grover return pdv; 396c66ac9dbSNicholas Bellinger } 397c66ac9dbSNicholas Bellinger 398c66ac9dbSNicholas Bellinger /* 399c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 400c66ac9dbSNicholas Bellinger */ 401c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_type_disk( 402c66ac9dbSNicholas Bellinger struct scsi_device *sd, 403c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 404c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 405c66ac9dbSNicholas Bellinger struct se_hba *hba) 4065dd7ed2eSDan Carpenter __releases(sh->host_lock) 407c66ac9dbSNicholas Bellinger { 408c66ac9dbSNicholas Bellinger struct se_device *dev; 409c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)pdv->pdv_se_hba->hba_ptr; 410c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 411c66ac9dbSNicholas Bellinger struct block_device *bd; 412c66ac9dbSNicholas Bellinger u32 dev_flags = 0; 413c66ac9dbSNicholas Bellinger 414c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 415c66ac9dbSNicholas Bellinger printk(KERN_ERR "scsi_device_get() failed for %d:%d:%d:%d\n", 416c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 417c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 418c66ac9dbSNicholas Bellinger return NULL; 419c66ac9dbSNicholas Bellinger } 420c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 421c66ac9dbSNicholas Bellinger /* 422c66ac9dbSNicholas Bellinger * Claim exclusive struct block_device access to struct scsi_device 423c66ac9dbSNicholas Bellinger * for TYPE_DISK using supplied udev_path 424c66ac9dbSNicholas Bellinger */ 425c66ac9dbSNicholas Bellinger bd = blkdev_get_by_path(se_dev->se_dev_udev_path, 426c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); 4273ae279d2SDan Carpenter if (IS_ERR(bd)) { 4283ae279d2SDan Carpenter printk(KERN_ERR "pSCSI: blkdev_get_by_path() failed\n"); 429c66ac9dbSNicholas Bellinger scsi_device_put(sd); 430c66ac9dbSNicholas Bellinger return NULL; 431c66ac9dbSNicholas Bellinger } 432c66ac9dbSNicholas Bellinger pdv->pdv_bd = bd; 433c66ac9dbSNicholas Bellinger 434c66ac9dbSNicholas Bellinger dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); 435c66ac9dbSNicholas Bellinger if (!(dev)) { 436c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); 437c66ac9dbSNicholas Bellinger scsi_device_put(sd); 438c66ac9dbSNicholas Bellinger return NULL; 439c66ac9dbSNicholas Bellinger } 440c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%d\n", 441c66ac9dbSNicholas Bellinger phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); 442c66ac9dbSNicholas Bellinger 443c66ac9dbSNicholas Bellinger return dev; 444c66ac9dbSNicholas Bellinger } 445c66ac9dbSNicholas Bellinger 446c66ac9dbSNicholas Bellinger /* 447c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 448c66ac9dbSNicholas Bellinger */ 449c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_type_rom( 450c66ac9dbSNicholas Bellinger struct scsi_device *sd, 451c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 452c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 453c66ac9dbSNicholas Bellinger struct se_hba *hba) 4545dd7ed2eSDan Carpenter __releases(sh->host_lock) 455c66ac9dbSNicholas Bellinger { 456c66ac9dbSNicholas Bellinger struct se_device *dev; 457c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)pdv->pdv_se_hba->hba_ptr; 458c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 459c66ac9dbSNicholas Bellinger u32 dev_flags = 0; 460c66ac9dbSNicholas Bellinger 461c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 462c66ac9dbSNicholas Bellinger printk(KERN_ERR "scsi_device_get() failed for %d:%d:%d:%d\n", 463c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 464c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 465c66ac9dbSNicholas Bellinger return NULL; 466c66ac9dbSNicholas Bellinger } 467c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 468c66ac9dbSNicholas Bellinger 469c66ac9dbSNicholas Bellinger dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); 470c66ac9dbSNicholas Bellinger if (!(dev)) { 471c66ac9dbSNicholas Bellinger scsi_device_put(sd); 472c66ac9dbSNicholas Bellinger return NULL; 473c66ac9dbSNicholas Bellinger } 474c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", 475c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 476c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 477c66ac9dbSNicholas Bellinger 478c66ac9dbSNicholas Bellinger return dev; 479c66ac9dbSNicholas Bellinger } 480c66ac9dbSNicholas Bellinger 481c66ac9dbSNicholas Bellinger /* 482c66ac9dbSNicholas Bellinger *Called with struct Scsi_Host->host_lock called. 483c66ac9dbSNicholas Bellinger */ 484c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_type_other( 485c66ac9dbSNicholas Bellinger struct scsi_device *sd, 486c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 487c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 488c66ac9dbSNicholas Bellinger struct se_hba *hba) 4895dd7ed2eSDan Carpenter __releases(sh->host_lock) 490c66ac9dbSNicholas Bellinger { 491c66ac9dbSNicholas Bellinger struct se_device *dev; 492c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)pdv->pdv_se_hba->hba_ptr; 493c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 494c66ac9dbSNicholas Bellinger u32 dev_flags = 0; 495c66ac9dbSNicholas Bellinger 496c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 497c66ac9dbSNicholas Bellinger dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); 498c66ac9dbSNicholas Bellinger if (!(dev)) 499c66ac9dbSNicholas Bellinger return NULL; 500c66ac9dbSNicholas Bellinger 501c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", 502c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 503c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 504c66ac9dbSNicholas Bellinger 505c66ac9dbSNicholas Bellinger return dev; 506c66ac9dbSNicholas Bellinger } 507c66ac9dbSNicholas Bellinger 508c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_virtdevice( 509c66ac9dbSNicholas Bellinger struct se_hba *hba, 510c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 511c66ac9dbSNicholas Bellinger void *p) 512c66ac9dbSNicholas Bellinger { 513c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = (struct pscsi_dev_virt *)p; 514c66ac9dbSNicholas Bellinger struct se_device *dev; 515c66ac9dbSNicholas Bellinger struct scsi_device *sd; 516c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)hba->hba_ptr; 517c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 518c66ac9dbSNicholas Bellinger int legacy_mode_enable = 0; 519c66ac9dbSNicholas Bellinger 520c66ac9dbSNicholas Bellinger if (!(pdv)) { 521c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to locate struct pscsi_dev_virt" 522c66ac9dbSNicholas Bellinger " parameter\n"); 523613640e4SNicholas Bellinger return ERR_PTR(-EINVAL); 524c66ac9dbSNicholas Bellinger } 525c66ac9dbSNicholas Bellinger /* 526c66ac9dbSNicholas Bellinger * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the 527c66ac9dbSNicholas Bellinger * struct Scsi_Host we will need to bring the TCM/pSCSI object online 528c66ac9dbSNicholas Bellinger */ 529c66ac9dbSNicholas Bellinger if (!(sh)) { 530c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 531c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: Unable to locate struct" 532c66ac9dbSNicholas Bellinger " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); 533613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 534c66ac9dbSNicholas Bellinger } 535c66ac9dbSNicholas Bellinger /* 536c66ac9dbSNicholas Bellinger * For the newer PHV_VIRUTAL_HOST_ID struct scsi_device 537c66ac9dbSNicholas Bellinger * reference, we enforce that udev_path has been set 538c66ac9dbSNicholas Bellinger */ 539c66ac9dbSNicholas Bellinger if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) { 540c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: udev_path attribute has not" 541c66ac9dbSNicholas Bellinger " been set before ENABLE=1\n"); 542613640e4SNicholas Bellinger return ERR_PTR(-EINVAL); 543c66ac9dbSNicholas Bellinger } 544c66ac9dbSNicholas Bellinger /* 545c66ac9dbSNicholas Bellinger * If no scsi_host_id= was passed for PHV_VIRUTAL_HOST_ID, 546c66ac9dbSNicholas Bellinger * use the original TCM hba ID to reference Linux/SCSI Host No 547c66ac9dbSNicholas Bellinger * and enable for PHV_LLD_SCSI_HOST_NO mode. 548c66ac9dbSNicholas Bellinger */ 549c66ac9dbSNicholas Bellinger if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { 550c66ac9dbSNicholas Bellinger spin_lock(&hba->device_lock); 551c66ac9dbSNicholas Bellinger if (!(list_empty(&hba->hba_dev_list))) { 552c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: Unable to set hba_mode" 553c66ac9dbSNicholas Bellinger " with active devices\n"); 554c66ac9dbSNicholas Bellinger spin_unlock(&hba->device_lock); 555613640e4SNicholas Bellinger return ERR_PTR(-EEXIST); 556c66ac9dbSNicholas Bellinger } 557c66ac9dbSNicholas Bellinger spin_unlock(&hba->device_lock); 558c66ac9dbSNicholas Bellinger 559c66ac9dbSNicholas Bellinger if (pscsi_pmode_enable_hba(hba, 1) != 1) 560613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 561c66ac9dbSNicholas Bellinger 562c66ac9dbSNicholas Bellinger legacy_mode_enable = 1; 563c66ac9dbSNicholas Bellinger hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 564c66ac9dbSNicholas Bellinger sh = phv->phv_lld_host; 565c66ac9dbSNicholas Bellinger } else { 566e3d6f909SAndy Grover sh = scsi_host_lookup(pdv->pdv_host_id); 567e3d6f909SAndy Grover if (IS_ERR(sh)) { 568c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: Unable to locate" 569c66ac9dbSNicholas Bellinger " pdv_host_id: %d\n", pdv->pdv_host_id); 570e3d6f909SAndy Grover return (struct se_device *) sh; 571c66ac9dbSNicholas Bellinger } 572c66ac9dbSNicholas Bellinger } 573c66ac9dbSNicholas Bellinger } else { 574c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) { 575c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: PHV_VIRUTAL_HOST_ID set while" 576c66ac9dbSNicholas Bellinger " struct Scsi_Host exists\n"); 577613640e4SNicholas Bellinger return ERR_PTR(-EEXIST); 578c66ac9dbSNicholas Bellinger } 579c66ac9dbSNicholas Bellinger } 580c66ac9dbSNicholas Bellinger 581c66ac9dbSNicholas Bellinger spin_lock_irq(sh->host_lock); 582c66ac9dbSNicholas Bellinger list_for_each_entry(sd, &sh->__devices, siblings) { 583c66ac9dbSNicholas Bellinger if ((pdv->pdv_channel_id != sd->channel) || 584c66ac9dbSNicholas Bellinger (pdv->pdv_target_id != sd->id) || 585c66ac9dbSNicholas Bellinger (pdv->pdv_lun_id != sd->lun)) 586c66ac9dbSNicholas Bellinger continue; 587c66ac9dbSNicholas Bellinger /* 588c66ac9dbSNicholas Bellinger * Functions will release the held struct scsi_host->host_lock 589c66ac9dbSNicholas Bellinger * before calling calling pscsi_add_device_to_list() to register 590c66ac9dbSNicholas Bellinger * struct scsi_device with target_core_mod. 591c66ac9dbSNicholas Bellinger */ 592c66ac9dbSNicholas Bellinger switch (sd->type) { 593c66ac9dbSNicholas Bellinger case TYPE_DISK: 594c66ac9dbSNicholas Bellinger dev = pscsi_create_type_disk(sd, pdv, se_dev, hba); 595c66ac9dbSNicholas Bellinger break; 596c66ac9dbSNicholas Bellinger case TYPE_ROM: 597c66ac9dbSNicholas Bellinger dev = pscsi_create_type_rom(sd, pdv, se_dev, hba); 598c66ac9dbSNicholas Bellinger break; 599c66ac9dbSNicholas Bellinger default: 600c66ac9dbSNicholas Bellinger dev = pscsi_create_type_other(sd, pdv, se_dev, hba); 601c66ac9dbSNicholas Bellinger break; 602c66ac9dbSNicholas Bellinger } 603c66ac9dbSNicholas Bellinger 604c66ac9dbSNicholas Bellinger if (!(dev)) { 605c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) 606c66ac9dbSNicholas Bellinger scsi_host_put(sh); 607c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 608c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 609c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 610c66ac9dbSNicholas Bellinger } 611c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 612613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 613c66ac9dbSNicholas Bellinger } 614c66ac9dbSNicholas Bellinger return dev; 615c66ac9dbSNicholas Bellinger } 616c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 617c66ac9dbSNicholas Bellinger 618c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, 619c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); 620c66ac9dbSNicholas Bellinger 621c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) 622c66ac9dbSNicholas Bellinger scsi_host_put(sh); 623c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 624c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 625c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 626c66ac9dbSNicholas Bellinger } 627c66ac9dbSNicholas Bellinger 628613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 629c66ac9dbSNicholas Bellinger } 630c66ac9dbSNicholas Bellinger 631c66ac9dbSNicholas Bellinger /* pscsi_free_device(): (Part of se_subsystem_api_t template) 632c66ac9dbSNicholas Bellinger * 633c66ac9dbSNicholas Bellinger * 634c66ac9dbSNicholas Bellinger */ 635c66ac9dbSNicholas Bellinger static void pscsi_free_device(void *p) 636c66ac9dbSNicholas Bellinger { 637c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = p; 638c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; 639c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 640c66ac9dbSNicholas Bellinger 641c66ac9dbSNicholas Bellinger if (sd) { 642c66ac9dbSNicholas Bellinger /* 643c66ac9dbSNicholas Bellinger * Release exclusive pSCSI internal struct block_device claim for 644c66ac9dbSNicholas Bellinger * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() 645c66ac9dbSNicholas Bellinger */ 646c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { 647c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, 648c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL); 649c66ac9dbSNicholas Bellinger pdv->pdv_bd = NULL; 650c66ac9dbSNicholas Bellinger } 651c66ac9dbSNicholas Bellinger /* 652c66ac9dbSNicholas Bellinger * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference 653c66ac9dbSNicholas Bellinger * to struct Scsi_Host now. 654c66ac9dbSNicholas Bellinger */ 655c66ac9dbSNicholas Bellinger if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && 656c66ac9dbSNicholas Bellinger (phv->phv_lld_host != NULL)) 657c66ac9dbSNicholas Bellinger scsi_host_put(phv->phv_lld_host); 658c66ac9dbSNicholas Bellinger 659c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) 660c66ac9dbSNicholas Bellinger scsi_device_put(sd); 661c66ac9dbSNicholas Bellinger 662c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 663c66ac9dbSNicholas Bellinger } 664c66ac9dbSNicholas Bellinger 665c66ac9dbSNicholas Bellinger kfree(pdv); 666c66ac9dbSNicholas Bellinger } 667c66ac9dbSNicholas Bellinger 668c66ac9dbSNicholas Bellinger static inline struct pscsi_plugin_task *PSCSI_TASK(struct se_task *task) 669c66ac9dbSNicholas Bellinger { 670c66ac9dbSNicholas Bellinger return container_of(task, struct pscsi_plugin_task, pscsi_task); 671c66ac9dbSNicholas Bellinger } 672c66ac9dbSNicholas Bellinger 673c66ac9dbSNicholas Bellinger 674c66ac9dbSNicholas Bellinger /* pscsi_transport_complete(): 675c66ac9dbSNicholas Bellinger * 676c66ac9dbSNicholas Bellinger * 677c66ac9dbSNicholas Bellinger */ 678c66ac9dbSNicholas Bellinger static int pscsi_transport_complete(struct se_task *task) 679c66ac9dbSNicholas Bellinger { 680c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; 681c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 682c66ac9dbSNicholas Bellinger int result; 683c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 684c66ac9dbSNicholas Bellinger unsigned char *cdb = &pt->pscsi_cdb[0]; 685c66ac9dbSNicholas Bellinger 686c66ac9dbSNicholas Bellinger result = pt->pscsi_result; 687c66ac9dbSNicholas Bellinger /* 688c66ac9dbSNicholas Bellinger * Hack to make sure that Write-Protect modepage is set if R/O mode is 689c66ac9dbSNicholas Bellinger * forced. 690c66ac9dbSNicholas Bellinger */ 691c66ac9dbSNicholas Bellinger if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && 692c66ac9dbSNicholas Bellinger (status_byte(result) << 1) == SAM_STAT_GOOD) { 693e3d6f909SAndy Grover if (!task->task_se_cmd->se_deve) 694c66ac9dbSNicholas Bellinger goto after_mode_sense; 695c66ac9dbSNicholas Bellinger 696e3d6f909SAndy Grover if (task->task_se_cmd->se_deve->lun_flags & 697c66ac9dbSNicholas Bellinger TRANSPORT_LUNFLAGS_READ_ONLY) { 698a1d8b49aSAndy Grover unsigned char *buf = task->task_se_cmd->t_task_buf; 699c66ac9dbSNicholas Bellinger 700c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SENSE_10) { 701c66ac9dbSNicholas Bellinger if (!(buf[3] & 0x80)) 702c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 703c66ac9dbSNicholas Bellinger } else { 704c66ac9dbSNicholas Bellinger if (!(buf[2] & 0x80)) 705c66ac9dbSNicholas Bellinger buf[2] |= 0x80; 706c66ac9dbSNicholas Bellinger } 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]); 730c66ac9dbSNicholas Bellinger if (!(buf)) { 731c66ac9dbSNicholas Bellinger printk(KERN_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 * 761c66ac9dbSNicholas Bellinger pscsi_alloc_task(struct se_cmd *cmd) 762c66ac9dbSNicholas Bellinger { 763c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt; 764a1d8b49aSAndy Grover unsigned char *cdb = cmd->t_task_cdb; 765c66ac9dbSNicholas Bellinger 766c66ac9dbSNicholas Bellinger pt = kzalloc(sizeof(struct pscsi_plugin_task), GFP_KERNEL); 767c66ac9dbSNicholas Bellinger if (!pt) { 768c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate struct pscsi_plugin_task\n"); 769c66ac9dbSNicholas Bellinger return NULL; 770c66ac9dbSNicholas Bellinger } 771c66ac9dbSNicholas Bellinger 772c66ac9dbSNicholas Bellinger /* 773c66ac9dbSNicholas Bellinger * If TCM Core is signaling a > TCM_MAX_COMMAND_SIZE allocation, 774c66ac9dbSNicholas Bellinger * allocate the extended CDB buffer for per struct se_task context 775c66ac9dbSNicholas Bellinger * pt->pscsi_cdb now. 776c66ac9dbSNicholas Bellinger */ 777a1d8b49aSAndy Grover if (cmd->t_task_cdb != cmd->__t_task_cdb) { 778c66ac9dbSNicholas Bellinger 779c66ac9dbSNicholas Bellinger pt->pscsi_cdb = kzalloc(scsi_command_size(cdb), GFP_KERNEL); 780c66ac9dbSNicholas Bellinger if (!(pt->pscsi_cdb)) { 781c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: Unable to allocate extended" 782c66ac9dbSNicholas Bellinger " pt->pscsi_cdb\n"); 7838fc1858aSRoland Dreier kfree(pt); 784c66ac9dbSNicholas Bellinger return NULL; 785c66ac9dbSNicholas Bellinger } 786c66ac9dbSNicholas Bellinger } else 787c66ac9dbSNicholas Bellinger pt->pscsi_cdb = &pt->__pscsi_cdb[0]; 788c66ac9dbSNicholas Bellinger 789c66ac9dbSNicholas Bellinger return &pt->pscsi_task; 790c66ac9dbSNicholas Bellinger } 791c66ac9dbSNicholas Bellinger 792c66ac9dbSNicholas Bellinger static inline void pscsi_blk_init_request( 793c66ac9dbSNicholas Bellinger struct se_task *task, 794c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt, 795c66ac9dbSNicholas Bellinger struct request *req, 796c66ac9dbSNicholas Bellinger int bidi_read) 797c66ac9dbSNicholas Bellinger { 798c66ac9dbSNicholas Bellinger /* 799c66ac9dbSNicholas Bellinger * Defined as "scsi command" in include/linux/blkdev.h. 800c66ac9dbSNicholas Bellinger */ 801c66ac9dbSNicholas Bellinger req->cmd_type = REQ_TYPE_BLOCK_PC; 802c66ac9dbSNicholas Bellinger /* 803c66ac9dbSNicholas Bellinger * For the extra BIDI-COMMAND READ struct request we do not 804c66ac9dbSNicholas Bellinger * need to setup the remaining structure members 805c66ac9dbSNicholas Bellinger */ 806c66ac9dbSNicholas Bellinger if (bidi_read) 807c66ac9dbSNicholas Bellinger return; 808c66ac9dbSNicholas Bellinger /* 809c66ac9dbSNicholas Bellinger * Setup the done function pointer for struct request, 810c66ac9dbSNicholas Bellinger * also set the end_io_data pointer.to struct se_task. 811c66ac9dbSNicholas Bellinger */ 812c66ac9dbSNicholas Bellinger req->end_io = pscsi_req_done; 8135951146dSAndy Grover req->end_io_data = task; 814c66ac9dbSNicholas Bellinger /* 815c66ac9dbSNicholas Bellinger * Load the referenced struct se_task's SCSI CDB into 816c66ac9dbSNicholas Bellinger * include/linux/blkdev.h:struct request->cmd 817c66ac9dbSNicholas Bellinger */ 818c66ac9dbSNicholas Bellinger req->cmd_len = scsi_command_size(pt->pscsi_cdb); 819c66ac9dbSNicholas Bellinger req->cmd = &pt->pscsi_cdb[0]; 820c66ac9dbSNicholas Bellinger /* 821c66ac9dbSNicholas Bellinger * Setup pointer for outgoing sense data. 822c66ac9dbSNicholas Bellinger */ 8235951146dSAndy Grover req->sense = &pt->pscsi_sense[0]; 824c66ac9dbSNicholas Bellinger req->sense_len = 0; 825c66ac9dbSNicholas Bellinger } 826c66ac9dbSNicholas Bellinger 827c66ac9dbSNicholas Bellinger /* 828c66ac9dbSNicholas Bellinger * Used for pSCSI data payloads for all *NON* SCF_SCSI_DATA_SG_IO_CDB 829c66ac9dbSNicholas Bellinger */ 830c66ac9dbSNicholas Bellinger static int pscsi_blk_get_request(struct se_task *task) 831c66ac9dbSNicholas Bellinger { 832c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 833c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; 834c66ac9dbSNicholas Bellinger 835c66ac9dbSNicholas Bellinger pt->pscsi_req = blk_get_request(pdv->pdv_sd->request_queue, 836c66ac9dbSNicholas Bellinger (task->task_data_direction == DMA_TO_DEVICE), 837c66ac9dbSNicholas Bellinger GFP_KERNEL); 838c66ac9dbSNicholas Bellinger if (!(pt->pscsi_req) || IS_ERR(pt->pscsi_req)) { 839c66ac9dbSNicholas Bellinger printk(KERN_ERR "PSCSI: blk_get_request() failed: %ld\n", 840c66ac9dbSNicholas Bellinger IS_ERR(pt->pscsi_req)); 841c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 842c66ac9dbSNicholas Bellinger } 843c66ac9dbSNicholas Bellinger /* 844c66ac9dbSNicholas Bellinger * Setup the newly allocated struct request for REQ_TYPE_BLOCK_PC, 845c66ac9dbSNicholas Bellinger * and setup rq callback, CDB and sense. 846c66ac9dbSNicholas Bellinger */ 847c66ac9dbSNicholas Bellinger pscsi_blk_init_request(task, pt, pt->pscsi_req, 0); 848c66ac9dbSNicholas Bellinger return 0; 849c66ac9dbSNicholas Bellinger } 850c66ac9dbSNicholas Bellinger 851c66ac9dbSNicholas Bellinger /* pscsi_do_task(): (Part of se_subsystem_api_t template) 852c66ac9dbSNicholas Bellinger * 853c66ac9dbSNicholas Bellinger * 854c66ac9dbSNicholas Bellinger */ 855c66ac9dbSNicholas Bellinger static int pscsi_do_task(struct se_task *task) 856c66ac9dbSNicholas Bellinger { 857c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 858c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; 859c66ac9dbSNicholas Bellinger /* 860c66ac9dbSNicholas Bellinger * Set the struct request->timeout value based on peripheral 861c66ac9dbSNicholas Bellinger * device type from SCSI. 862c66ac9dbSNicholas Bellinger */ 863c66ac9dbSNicholas Bellinger if (pdv->pdv_sd->type == TYPE_DISK) 864c66ac9dbSNicholas Bellinger pt->pscsi_req->timeout = PS_TIMEOUT_DISK; 865c66ac9dbSNicholas Bellinger else 866c66ac9dbSNicholas Bellinger pt->pscsi_req->timeout = PS_TIMEOUT_OTHER; 867c66ac9dbSNicholas Bellinger 868c66ac9dbSNicholas Bellinger pt->pscsi_req->retries = PS_RETRY; 869c66ac9dbSNicholas Bellinger /* 870c66ac9dbSNicholas Bellinger * Queue the struct request into the struct scsi_device->request_queue. 871c66ac9dbSNicholas Bellinger * Also check for HEAD_OF_QUEUE SAM TASK attr from received se_cmd 872c66ac9dbSNicholas Bellinger * descriptor 873c66ac9dbSNicholas Bellinger */ 874c66ac9dbSNicholas Bellinger blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, pt->pscsi_req, 875e66ecd50SNicholas Bellinger (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG), 876c66ac9dbSNicholas Bellinger pscsi_req_done); 877c66ac9dbSNicholas Bellinger 878c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_SENT_TO_TRANSPORT; 879c66ac9dbSNicholas Bellinger } 880c66ac9dbSNicholas Bellinger 881c66ac9dbSNicholas Bellinger static void pscsi_free_task(struct se_task *task) 882c66ac9dbSNicholas Bellinger { 883c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 884c66ac9dbSNicholas Bellinger struct se_cmd *cmd = task->task_se_cmd; 885c66ac9dbSNicholas Bellinger 886c66ac9dbSNicholas Bellinger /* 887c66ac9dbSNicholas Bellinger * Release the extended CDB allocation from pscsi_alloc_task() 888c66ac9dbSNicholas Bellinger * if one exists. 889c66ac9dbSNicholas Bellinger */ 890a1d8b49aSAndy Grover if (cmd->t_task_cdb != cmd->__t_task_cdb) 891c66ac9dbSNicholas Bellinger kfree(pt->pscsi_cdb); 892c66ac9dbSNicholas Bellinger /* 893c66ac9dbSNicholas Bellinger * We do not release the bio(s) here associated with this task, as 894c66ac9dbSNicholas Bellinger * this is handled by bio_put() and pscsi_bi_endio(). 895c66ac9dbSNicholas Bellinger */ 896c66ac9dbSNicholas Bellinger kfree(pt); 897c66ac9dbSNicholas Bellinger } 898c66ac9dbSNicholas Bellinger 899c66ac9dbSNicholas Bellinger enum { 900c66ac9dbSNicholas Bellinger Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, 901c66ac9dbSNicholas Bellinger Opt_scsi_lun_id, Opt_err 902c66ac9dbSNicholas Bellinger }; 903c66ac9dbSNicholas Bellinger 904c66ac9dbSNicholas Bellinger static match_table_t tokens = { 905c66ac9dbSNicholas Bellinger {Opt_scsi_host_id, "scsi_host_id=%d"}, 906c66ac9dbSNicholas Bellinger {Opt_scsi_channel_id, "scsi_channel_id=%d"}, 907c66ac9dbSNicholas Bellinger {Opt_scsi_target_id, "scsi_target_id=%d"}, 908c66ac9dbSNicholas Bellinger {Opt_scsi_lun_id, "scsi_lun_id=%d"}, 909c66ac9dbSNicholas Bellinger {Opt_err, NULL} 910c66ac9dbSNicholas Bellinger }; 911c66ac9dbSNicholas Bellinger 912c66ac9dbSNicholas Bellinger static ssize_t pscsi_set_configfs_dev_params(struct se_hba *hba, 913c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 914c66ac9dbSNicholas Bellinger const char *page, 915c66ac9dbSNicholas Bellinger ssize_t count) 916c66ac9dbSNicholas Bellinger { 917c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; 918c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 919c66ac9dbSNicholas Bellinger char *orig, *ptr, *opts; 920c66ac9dbSNicholas Bellinger substring_t args[MAX_OPT_ARGS]; 921c66ac9dbSNicholas Bellinger int ret = 0, arg, token; 922c66ac9dbSNicholas Bellinger 923c66ac9dbSNicholas Bellinger opts = kstrdup(page, GFP_KERNEL); 924c66ac9dbSNicholas Bellinger if (!opts) 925c66ac9dbSNicholas Bellinger return -ENOMEM; 926c66ac9dbSNicholas Bellinger 927c66ac9dbSNicholas Bellinger orig = opts; 928c66ac9dbSNicholas Bellinger 929c66ac9dbSNicholas Bellinger while ((ptr = strsep(&opts, ",")) != NULL) { 930c66ac9dbSNicholas Bellinger if (!*ptr) 931c66ac9dbSNicholas Bellinger continue; 932c66ac9dbSNicholas Bellinger 933c66ac9dbSNicholas Bellinger token = match_token(ptr, tokens, args); 934c66ac9dbSNicholas Bellinger switch (token) { 935c66ac9dbSNicholas Bellinger case Opt_scsi_host_id: 936c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 937c66ac9dbSNicholas Bellinger printk(KERN_ERR "PSCSI[%d]: Unable to accept" 938c66ac9dbSNicholas Bellinger " scsi_host_id while phv_mode ==" 939c66ac9dbSNicholas Bellinger " PHV_LLD_SCSI_HOST_NO\n", 940c66ac9dbSNicholas Bellinger phv->phv_host_id); 941c66ac9dbSNicholas Bellinger ret = -EINVAL; 942c66ac9dbSNicholas Bellinger goto out; 943c66ac9dbSNicholas Bellinger } 944c66ac9dbSNicholas Bellinger match_int(args, &arg); 945c66ac9dbSNicholas Bellinger pdv->pdv_host_id = arg; 946c66ac9dbSNicholas Bellinger printk(KERN_INFO "PSCSI[%d]: Referencing SCSI Host ID:" 947c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_host_id); 948c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; 949c66ac9dbSNicholas Bellinger break; 950c66ac9dbSNicholas Bellinger case Opt_scsi_channel_id: 951c66ac9dbSNicholas Bellinger match_int(args, &arg); 952c66ac9dbSNicholas Bellinger pdv->pdv_channel_id = arg; 953c66ac9dbSNicholas Bellinger printk(KERN_INFO "PSCSI[%d]: Referencing SCSI Channel" 954c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 955c66ac9dbSNicholas Bellinger pdv->pdv_channel_id); 956c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; 957c66ac9dbSNicholas Bellinger break; 958c66ac9dbSNicholas Bellinger case Opt_scsi_target_id: 959c66ac9dbSNicholas Bellinger match_int(args, &arg); 960c66ac9dbSNicholas Bellinger pdv->pdv_target_id = arg; 961c66ac9dbSNicholas Bellinger printk(KERN_INFO "PSCSI[%d]: Referencing SCSI Target" 962c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 963c66ac9dbSNicholas Bellinger pdv->pdv_target_id); 964c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_TARGET_ID; 965c66ac9dbSNicholas Bellinger break; 966c66ac9dbSNicholas Bellinger case Opt_scsi_lun_id: 967c66ac9dbSNicholas Bellinger match_int(args, &arg); 968c66ac9dbSNicholas Bellinger pdv->pdv_lun_id = arg; 969c66ac9dbSNicholas Bellinger printk(KERN_INFO "PSCSI[%d]: Referencing SCSI LUN ID:" 970c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_lun_id); 971c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_LUN_ID; 972c66ac9dbSNicholas Bellinger break; 973c66ac9dbSNicholas Bellinger default: 974c66ac9dbSNicholas Bellinger break; 975c66ac9dbSNicholas Bellinger } 976c66ac9dbSNicholas Bellinger } 977c66ac9dbSNicholas Bellinger 978c66ac9dbSNicholas Bellinger out: 979c66ac9dbSNicholas Bellinger kfree(orig); 980c66ac9dbSNicholas Bellinger return (!ret) ? count : ret; 981c66ac9dbSNicholas Bellinger } 982c66ac9dbSNicholas Bellinger 983c66ac9dbSNicholas Bellinger static ssize_t pscsi_check_configfs_dev_params( 984c66ac9dbSNicholas Bellinger struct se_hba *hba, 985c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev) 986c66ac9dbSNicholas Bellinger { 987c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; 988c66ac9dbSNicholas Bellinger 989c66ac9dbSNicholas Bellinger if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || 990c66ac9dbSNicholas Bellinger !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || 991c66ac9dbSNicholas Bellinger !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { 992c66ac9dbSNicholas Bellinger printk(KERN_ERR "Missing scsi_channel_id=, scsi_target_id= and" 993c66ac9dbSNicholas Bellinger " scsi_lun_id= parameters\n"); 994e3d6f909SAndy Grover return -EINVAL; 995c66ac9dbSNicholas Bellinger } 996c66ac9dbSNicholas Bellinger 997c66ac9dbSNicholas Bellinger return 0; 998c66ac9dbSNicholas Bellinger } 999c66ac9dbSNicholas Bellinger 1000c66ac9dbSNicholas Bellinger static ssize_t pscsi_show_configfs_dev_params(struct se_hba *hba, 1001c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 1002c66ac9dbSNicholas Bellinger char *b) 1003c66ac9dbSNicholas Bellinger { 1004c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 1005c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; 1006c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 1007c66ac9dbSNicholas Bellinger unsigned char host_id[16]; 1008c66ac9dbSNicholas Bellinger ssize_t bl; 1009c66ac9dbSNicholas Bellinger int i; 1010c66ac9dbSNicholas Bellinger 1011c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) 1012c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "%d", pdv->pdv_host_id); 1013c66ac9dbSNicholas Bellinger else 1014c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "PHBA Mode"); 1015c66ac9dbSNicholas Bellinger 1016c66ac9dbSNicholas Bellinger bl = sprintf(b, "SCSI Device Bus Location:" 1017c66ac9dbSNicholas Bellinger " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", 1018c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, 1019c66ac9dbSNicholas Bellinger host_id); 1020c66ac9dbSNicholas Bellinger 1021c66ac9dbSNicholas Bellinger if (sd) { 1022c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 1023c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "Vendor: "); 1024c66ac9dbSNicholas Bellinger for (i = 0; i < 8; i++) { 1025c66ac9dbSNicholas Bellinger if (ISPRINT(sd->vendor[i])) /* printable character? */ 1026c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->vendor[i]); 1027c66ac9dbSNicholas Bellinger else 1028c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 1029c66ac9dbSNicholas Bellinger } 1030c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Model: "); 1031c66ac9dbSNicholas Bellinger for (i = 0; i < 16; i++) { 1032c66ac9dbSNicholas Bellinger if (ISPRINT(sd->model[i])) /* printable character ? */ 1033c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->model[i]); 1034c66ac9dbSNicholas Bellinger else 1035c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 1036c66ac9dbSNicholas Bellinger } 1037c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Rev: "); 1038c66ac9dbSNicholas Bellinger for (i = 0; i < 4; i++) { 1039c66ac9dbSNicholas Bellinger if (ISPRINT(sd->rev[i])) /* printable character ? */ 1040c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->rev[i]); 1041c66ac9dbSNicholas Bellinger else 1042c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 1043c66ac9dbSNicholas Bellinger } 1044c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "\n"); 1045c66ac9dbSNicholas Bellinger } 1046c66ac9dbSNicholas Bellinger return bl; 1047c66ac9dbSNicholas Bellinger } 1048c66ac9dbSNicholas Bellinger 1049c66ac9dbSNicholas Bellinger static void pscsi_bi_endio(struct bio *bio, int error) 1050c66ac9dbSNicholas Bellinger { 1051c66ac9dbSNicholas Bellinger bio_put(bio); 1052c66ac9dbSNicholas Bellinger } 1053c66ac9dbSNicholas Bellinger 1054a1d8b49aSAndy Grover static inline struct bio *pscsi_get_bio(int sg_num) 1055c66ac9dbSNicholas Bellinger { 1056c66ac9dbSNicholas Bellinger struct bio *bio; 1057c66ac9dbSNicholas Bellinger /* 1058c66ac9dbSNicholas Bellinger * Use bio_malloc() following the comment in for bio -> struct request 1059c66ac9dbSNicholas Bellinger * in block/blk-core.c:blk_make_request() 1060c66ac9dbSNicholas Bellinger */ 1061c66ac9dbSNicholas Bellinger bio = bio_kmalloc(GFP_KERNEL, sg_num); 1062c66ac9dbSNicholas Bellinger if (!(bio)) { 1063c66ac9dbSNicholas Bellinger printk(KERN_ERR "PSCSI: bio_kmalloc() failed\n"); 1064c66ac9dbSNicholas Bellinger return NULL; 1065c66ac9dbSNicholas Bellinger } 1066c66ac9dbSNicholas Bellinger bio->bi_end_io = pscsi_bi_endio; 1067c66ac9dbSNicholas Bellinger 1068c66ac9dbSNicholas Bellinger return bio; 1069c66ac9dbSNicholas Bellinger } 1070c66ac9dbSNicholas Bellinger 1071c66ac9dbSNicholas Bellinger #if 0 1072c66ac9dbSNicholas Bellinger #define DEBUG_PSCSI(x...) printk(x) 1073c66ac9dbSNicholas Bellinger #else 1074c66ac9dbSNicholas Bellinger #define DEBUG_PSCSI(x...) 1075c66ac9dbSNicholas Bellinger #endif 1076c66ac9dbSNicholas Bellinger 1077c66ac9dbSNicholas Bellinger static int __pscsi_map_task_SG( 1078c66ac9dbSNicholas Bellinger struct se_task *task, 1079c66ac9dbSNicholas Bellinger struct scatterlist *task_sg, 1080c66ac9dbSNicholas Bellinger u32 task_sg_num, 1081c66ac9dbSNicholas Bellinger int bidi_read) 1082c66ac9dbSNicholas Bellinger { 1083c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 1084c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; 1085c66ac9dbSNicholas Bellinger struct bio *bio = NULL, *hbio = NULL, *tbio = NULL; 1086c66ac9dbSNicholas Bellinger struct page *page; 1087c66ac9dbSNicholas Bellinger struct scatterlist *sg; 1088c66ac9dbSNicholas Bellinger u32 data_len = task->task_size, i, len, bytes, off; 1089c66ac9dbSNicholas Bellinger int nr_pages = (task->task_size + task_sg[0].offset + 1090c66ac9dbSNicholas Bellinger PAGE_SIZE - 1) >> PAGE_SHIFT; 1091c66ac9dbSNicholas Bellinger int nr_vecs = 0, rc, ret = PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES; 1092c66ac9dbSNicholas Bellinger int rw = (task->task_data_direction == DMA_TO_DEVICE); 1093c66ac9dbSNicholas Bellinger 1094c66ac9dbSNicholas Bellinger if (!task->task_size) 1095c66ac9dbSNicholas Bellinger return 0; 1096c66ac9dbSNicholas Bellinger /* 1097c66ac9dbSNicholas Bellinger * For SCF_SCSI_DATA_SG_IO_CDB, Use fs/bio.c:bio_add_page() to setup 1098c66ac9dbSNicholas Bellinger * the bio_vec maplist from TC< struct se_mem -> task->task_sg -> 1099c66ac9dbSNicholas Bellinger * struct scatterlist memory. The struct se_task->task_sg[] currently needs 1100c66ac9dbSNicholas Bellinger * to be attached to struct bios for submission to Linux/SCSI using 1101c66ac9dbSNicholas Bellinger * struct request to struct scsi_device->request_queue. 1102c66ac9dbSNicholas Bellinger * 1103c66ac9dbSNicholas Bellinger * Note that this will be changing post v2.6.28 as Target_Core_Mod/pSCSI 1104c66ac9dbSNicholas Bellinger * is ported to upstream SCSI passthrough functionality that accepts 1105c66ac9dbSNicholas Bellinger * struct scatterlist->page_link or struct page as a paraemeter. 1106c66ac9dbSNicholas Bellinger */ 1107c66ac9dbSNicholas Bellinger DEBUG_PSCSI("PSCSI: nr_pages: %d\n", nr_pages); 1108c66ac9dbSNicholas Bellinger 1109c66ac9dbSNicholas Bellinger for_each_sg(task_sg, sg, task_sg_num, i) { 1110c66ac9dbSNicholas Bellinger page = sg_page(sg); 1111c66ac9dbSNicholas Bellinger off = sg->offset; 1112c66ac9dbSNicholas Bellinger len = sg->length; 1113c66ac9dbSNicholas Bellinger 1114c66ac9dbSNicholas Bellinger DEBUG_PSCSI("PSCSI: i: %d page: %p len: %d off: %d\n", i, 1115c66ac9dbSNicholas Bellinger page, len, off); 1116c66ac9dbSNicholas Bellinger 1117c66ac9dbSNicholas Bellinger while (len > 0 && data_len > 0) { 1118c66ac9dbSNicholas Bellinger bytes = min_t(unsigned int, len, PAGE_SIZE - off); 1119c66ac9dbSNicholas Bellinger bytes = min(bytes, data_len); 1120c66ac9dbSNicholas Bellinger 1121c66ac9dbSNicholas Bellinger if (!(bio)) { 1122c66ac9dbSNicholas Bellinger nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); 1123c66ac9dbSNicholas Bellinger nr_pages -= nr_vecs; 1124c66ac9dbSNicholas Bellinger /* 1125c66ac9dbSNicholas Bellinger * Calls bio_kmalloc() and sets bio->bi_end_io() 1126c66ac9dbSNicholas Bellinger */ 1127a1d8b49aSAndy Grover bio = pscsi_get_bio(nr_vecs); 1128c66ac9dbSNicholas Bellinger if (!(bio)) 1129c66ac9dbSNicholas Bellinger goto fail; 1130c66ac9dbSNicholas Bellinger 1131c66ac9dbSNicholas Bellinger if (rw) 1132c66ac9dbSNicholas Bellinger bio->bi_rw |= REQ_WRITE; 1133c66ac9dbSNicholas Bellinger 1134c66ac9dbSNicholas Bellinger DEBUG_PSCSI("PSCSI: Allocated bio: %p," 1135c66ac9dbSNicholas Bellinger " dir: %s nr_vecs: %d\n", bio, 1136c66ac9dbSNicholas Bellinger (rw) ? "rw" : "r", nr_vecs); 1137c66ac9dbSNicholas Bellinger /* 1138c66ac9dbSNicholas Bellinger * Set *hbio pointer to handle the case: 1139c66ac9dbSNicholas Bellinger * nr_pages > BIO_MAX_PAGES, where additional 1140c66ac9dbSNicholas Bellinger * bios need to be added to complete a given 1141c66ac9dbSNicholas Bellinger * struct se_task 1142c66ac9dbSNicholas Bellinger */ 1143c66ac9dbSNicholas Bellinger if (!hbio) 1144c66ac9dbSNicholas Bellinger hbio = tbio = bio; 1145c66ac9dbSNicholas Bellinger else 1146c66ac9dbSNicholas Bellinger tbio = tbio->bi_next = bio; 1147c66ac9dbSNicholas Bellinger } 1148c66ac9dbSNicholas Bellinger 1149c66ac9dbSNicholas Bellinger DEBUG_PSCSI("PSCSI: Calling bio_add_pc_page() i: %d" 1150c66ac9dbSNicholas Bellinger " bio: %p page: %p len: %d off: %d\n", i, bio, 1151c66ac9dbSNicholas Bellinger page, len, off); 1152c66ac9dbSNicholas Bellinger 1153c66ac9dbSNicholas Bellinger rc = bio_add_pc_page(pdv->pdv_sd->request_queue, 1154c66ac9dbSNicholas Bellinger bio, page, bytes, off); 1155c66ac9dbSNicholas Bellinger if (rc != bytes) 1156c66ac9dbSNicholas Bellinger goto fail; 1157c66ac9dbSNicholas Bellinger 1158c66ac9dbSNicholas Bellinger DEBUG_PSCSI("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", 1159c66ac9dbSNicholas Bellinger bio->bi_vcnt, nr_vecs); 1160c66ac9dbSNicholas Bellinger 1161c66ac9dbSNicholas Bellinger if (bio->bi_vcnt > nr_vecs) { 1162c66ac9dbSNicholas Bellinger DEBUG_PSCSI("PSCSI: Reached bio->bi_vcnt max:" 1163c66ac9dbSNicholas Bellinger " %d i: %d bio: %p, allocating another" 1164c66ac9dbSNicholas Bellinger " bio\n", bio->bi_vcnt, i, bio); 1165c66ac9dbSNicholas Bellinger /* 1166c66ac9dbSNicholas Bellinger * Clear the pointer so that another bio will 1167c66ac9dbSNicholas Bellinger * be allocated with pscsi_get_bio() above, the 1168c66ac9dbSNicholas Bellinger * current bio has already been set *tbio and 1169c66ac9dbSNicholas Bellinger * bio->bi_next. 1170c66ac9dbSNicholas Bellinger */ 1171c66ac9dbSNicholas Bellinger bio = NULL; 1172c66ac9dbSNicholas Bellinger } 1173c66ac9dbSNicholas Bellinger 1174c66ac9dbSNicholas Bellinger page++; 1175c66ac9dbSNicholas Bellinger len -= bytes; 1176c66ac9dbSNicholas Bellinger data_len -= bytes; 1177c66ac9dbSNicholas Bellinger off = 0; 1178c66ac9dbSNicholas Bellinger } 1179c66ac9dbSNicholas Bellinger } 1180c66ac9dbSNicholas Bellinger /* 1181c66ac9dbSNicholas Bellinger * Setup the primary pt->pscsi_req used for non BIDI and BIDI-COMMAND 1182c66ac9dbSNicholas Bellinger * primary SCSI WRITE poayload mapped for struct se_task->task_sg[] 1183c66ac9dbSNicholas Bellinger */ 1184c66ac9dbSNicholas Bellinger if (!(bidi_read)) { 1185c66ac9dbSNicholas Bellinger /* 1186c66ac9dbSNicholas Bellinger * Starting with v2.6.31, call blk_make_request() passing in *hbio to 1187c66ac9dbSNicholas Bellinger * allocate the pSCSI task a struct request. 1188c66ac9dbSNicholas Bellinger */ 1189c66ac9dbSNicholas Bellinger pt->pscsi_req = blk_make_request(pdv->pdv_sd->request_queue, 1190c66ac9dbSNicholas Bellinger hbio, GFP_KERNEL); 1191c66ac9dbSNicholas Bellinger if (!(pt->pscsi_req)) { 1192c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: blk_make_request() failed\n"); 1193c66ac9dbSNicholas Bellinger goto fail; 1194c66ac9dbSNicholas Bellinger } 1195c66ac9dbSNicholas Bellinger /* 1196c66ac9dbSNicholas Bellinger * Setup the newly allocated struct request for REQ_TYPE_BLOCK_PC, 1197c66ac9dbSNicholas Bellinger * and setup rq callback, CDB and sense. 1198c66ac9dbSNicholas Bellinger */ 1199c66ac9dbSNicholas Bellinger pscsi_blk_init_request(task, pt, pt->pscsi_req, 0); 1200c66ac9dbSNicholas Bellinger 1201c66ac9dbSNicholas Bellinger return task->task_sg_num; 1202c66ac9dbSNicholas Bellinger } 1203c66ac9dbSNicholas Bellinger /* 1204c66ac9dbSNicholas Bellinger * Setup the secondary pt->pscsi_req->next_rq used for the extra BIDI-COMMAND 1205c66ac9dbSNicholas Bellinger * SCSI READ paylaod mapped for struct se_task->task_sg_bidi[] 1206c66ac9dbSNicholas Bellinger */ 1207c66ac9dbSNicholas Bellinger pt->pscsi_req->next_rq = blk_make_request(pdv->pdv_sd->request_queue, 1208c66ac9dbSNicholas Bellinger hbio, GFP_KERNEL); 1209c66ac9dbSNicholas Bellinger if (!(pt->pscsi_req->next_rq)) { 1210c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: blk_make_request() failed for BIDI\n"); 1211c66ac9dbSNicholas Bellinger goto fail; 1212c66ac9dbSNicholas Bellinger } 1213c66ac9dbSNicholas Bellinger pscsi_blk_init_request(task, pt, pt->pscsi_req->next_rq, 1); 1214c66ac9dbSNicholas Bellinger 1215c66ac9dbSNicholas Bellinger return task->task_sg_num; 1216c66ac9dbSNicholas Bellinger fail: 1217c66ac9dbSNicholas Bellinger while (hbio) { 1218c66ac9dbSNicholas Bellinger bio = hbio; 1219c66ac9dbSNicholas Bellinger hbio = hbio->bi_next; 1220c66ac9dbSNicholas Bellinger bio->bi_next = NULL; 1221c66ac9dbSNicholas Bellinger bio_endio(bio, 0); 1222c66ac9dbSNicholas Bellinger } 1223c66ac9dbSNicholas Bellinger return ret; 1224c66ac9dbSNicholas Bellinger } 1225c66ac9dbSNicholas Bellinger 1226c66ac9dbSNicholas Bellinger static int pscsi_map_task_SG(struct se_task *task) 1227c66ac9dbSNicholas Bellinger { 1228c66ac9dbSNicholas Bellinger int ret; 1229c66ac9dbSNicholas Bellinger 1230c66ac9dbSNicholas Bellinger /* 1231c66ac9dbSNicholas Bellinger * Setup the main struct request for the task->task_sg[] payload 1232c66ac9dbSNicholas Bellinger */ 1233c66ac9dbSNicholas Bellinger 1234c66ac9dbSNicholas Bellinger ret = __pscsi_map_task_SG(task, task->task_sg, task->task_sg_num, 0); 1235c66ac9dbSNicholas Bellinger if (ret >= 0 && task->task_sg_bidi) { 1236c66ac9dbSNicholas Bellinger /* 1237c66ac9dbSNicholas Bellinger * If present, set up the extra BIDI-COMMAND SCSI READ 1238c66ac9dbSNicholas Bellinger * struct request and payload. 1239c66ac9dbSNicholas Bellinger */ 1240c66ac9dbSNicholas Bellinger ret = __pscsi_map_task_SG(task, task->task_sg_bidi, 1241c66ac9dbSNicholas Bellinger task->task_sg_num, 1); 1242c66ac9dbSNicholas Bellinger } 1243c66ac9dbSNicholas Bellinger 1244c66ac9dbSNicholas Bellinger if (ret < 0) 1245c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 1246c66ac9dbSNicholas Bellinger return 0; 1247c66ac9dbSNicholas Bellinger } 1248c66ac9dbSNicholas Bellinger 1249c66ac9dbSNicholas Bellinger /* pscsi_map_task_non_SG(): 1250c66ac9dbSNicholas Bellinger * 1251c66ac9dbSNicholas Bellinger * 1252c66ac9dbSNicholas Bellinger */ 1253c66ac9dbSNicholas Bellinger static int pscsi_map_task_non_SG(struct se_task *task) 1254c66ac9dbSNicholas Bellinger { 1255e3d6f909SAndy Grover struct se_cmd *cmd = task->task_se_cmd; 1256c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 1257c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; 1258c66ac9dbSNicholas Bellinger int ret = 0; 1259c66ac9dbSNicholas Bellinger 1260c66ac9dbSNicholas Bellinger if (pscsi_blk_get_request(task) < 0) 1261c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 1262c66ac9dbSNicholas Bellinger 1263c66ac9dbSNicholas Bellinger if (!task->task_size) 1264c66ac9dbSNicholas Bellinger return 0; 1265c66ac9dbSNicholas Bellinger 1266c66ac9dbSNicholas Bellinger ret = blk_rq_map_kern(pdv->pdv_sd->request_queue, 1267a1d8b49aSAndy Grover pt->pscsi_req, cmd->t_task_buf, 1268c66ac9dbSNicholas Bellinger task->task_size, GFP_KERNEL); 1269c66ac9dbSNicholas Bellinger if (ret < 0) { 1270c66ac9dbSNicholas Bellinger printk(KERN_ERR "PSCSI: blk_rq_map_kern() failed: %d\n", ret); 1271c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 1272c66ac9dbSNicholas Bellinger } 1273c66ac9dbSNicholas Bellinger return 0; 1274c66ac9dbSNicholas Bellinger } 1275c66ac9dbSNicholas Bellinger 1276c66ac9dbSNicholas Bellinger static int pscsi_CDB_none(struct se_task *task) 1277c66ac9dbSNicholas Bellinger { 1278c66ac9dbSNicholas Bellinger return pscsi_blk_get_request(task); 1279c66ac9dbSNicholas Bellinger } 1280c66ac9dbSNicholas Bellinger 1281c66ac9dbSNicholas Bellinger /* pscsi_get_cdb(): 1282c66ac9dbSNicholas Bellinger * 1283c66ac9dbSNicholas Bellinger * 1284c66ac9dbSNicholas Bellinger */ 1285c66ac9dbSNicholas Bellinger static unsigned char *pscsi_get_cdb(struct se_task *task) 1286c66ac9dbSNicholas Bellinger { 1287c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 1288c66ac9dbSNicholas Bellinger 1289c66ac9dbSNicholas Bellinger return pt->pscsi_cdb; 1290c66ac9dbSNicholas Bellinger } 1291c66ac9dbSNicholas Bellinger 1292c66ac9dbSNicholas Bellinger /* pscsi_get_sense_buffer(): 1293c66ac9dbSNicholas Bellinger * 1294c66ac9dbSNicholas Bellinger * 1295c66ac9dbSNicholas Bellinger */ 1296c66ac9dbSNicholas Bellinger static unsigned char *pscsi_get_sense_buffer(struct se_task *task) 1297c66ac9dbSNicholas Bellinger { 1298c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 1299c66ac9dbSNicholas Bellinger 1300c66ac9dbSNicholas Bellinger return (unsigned char *)&pt->pscsi_sense[0]; 1301c66ac9dbSNicholas Bellinger } 1302c66ac9dbSNicholas Bellinger 1303c66ac9dbSNicholas Bellinger /* pscsi_get_device_rev(): 1304c66ac9dbSNicholas Bellinger * 1305c66ac9dbSNicholas Bellinger * 1306c66ac9dbSNicholas Bellinger */ 1307c66ac9dbSNicholas Bellinger static u32 pscsi_get_device_rev(struct se_device *dev) 1308c66ac9dbSNicholas Bellinger { 1309c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = dev->dev_ptr; 1310c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 1311c66ac9dbSNicholas Bellinger 1312c66ac9dbSNicholas Bellinger return (sd->scsi_level - 1) ? sd->scsi_level - 1 : 1; 1313c66ac9dbSNicholas Bellinger } 1314c66ac9dbSNicholas Bellinger 1315c66ac9dbSNicholas Bellinger /* pscsi_get_device_type(): 1316c66ac9dbSNicholas Bellinger * 1317c66ac9dbSNicholas Bellinger * 1318c66ac9dbSNicholas Bellinger */ 1319c66ac9dbSNicholas Bellinger static u32 pscsi_get_device_type(struct se_device *dev) 1320c66ac9dbSNicholas Bellinger { 1321c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = dev->dev_ptr; 1322c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 1323c66ac9dbSNicholas Bellinger 1324c66ac9dbSNicholas Bellinger return sd->type; 1325c66ac9dbSNicholas Bellinger } 1326c66ac9dbSNicholas Bellinger 1327c66ac9dbSNicholas Bellinger static sector_t pscsi_get_blocks(struct se_device *dev) 1328c66ac9dbSNicholas Bellinger { 1329c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = dev->dev_ptr; 1330c66ac9dbSNicholas Bellinger 1331c66ac9dbSNicholas Bellinger if (pdv->pdv_bd && pdv->pdv_bd->bd_part) 1332c66ac9dbSNicholas Bellinger return pdv->pdv_bd->bd_part->nr_sects; 1333c66ac9dbSNicholas Bellinger 1334c66ac9dbSNicholas Bellinger dump_stack(); 1335c66ac9dbSNicholas Bellinger return 0; 1336c66ac9dbSNicholas Bellinger } 1337c66ac9dbSNicholas Bellinger 1338c66ac9dbSNicholas Bellinger /* pscsi_handle_SAM_STATUS_failures(): 1339c66ac9dbSNicholas Bellinger * 1340c66ac9dbSNicholas Bellinger * 1341c66ac9dbSNicholas Bellinger */ 1342c66ac9dbSNicholas Bellinger static inline void pscsi_process_SAM_status( 1343c66ac9dbSNicholas Bellinger struct se_task *task, 1344c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt) 1345c66ac9dbSNicholas Bellinger { 1346c66ac9dbSNicholas Bellinger task->task_scsi_status = status_byte(pt->pscsi_result); 1347c66ac9dbSNicholas Bellinger if ((task->task_scsi_status)) { 1348c66ac9dbSNicholas Bellinger task->task_scsi_status <<= 1; 1349c66ac9dbSNicholas Bellinger printk(KERN_INFO "PSCSI Status Byte exception at task: %p CDB:" 1350c66ac9dbSNicholas Bellinger " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0], 1351c66ac9dbSNicholas Bellinger pt->pscsi_result); 1352c66ac9dbSNicholas Bellinger } 1353c66ac9dbSNicholas Bellinger 1354c66ac9dbSNicholas Bellinger switch (host_byte(pt->pscsi_result)) { 1355c66ac9dbSNicholas Bellinger case DID_OK: 1356c66ac9dbSNicholas Bellinger transport_complete_task(task, (!task->task_scsi_status)); 1357c66ac9dbSNicholas Bellinger break; 1358c66ac9dbSNicholas Bellinger default: 1359c66ac9dbSNicholas Bellinger printk(KERN_INFO "PSCSI Host Byte exception at task: %p CDB:" 1360c66ac9dbSNicholas Bellinger " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0], 1361c66ac9dbSNicholas Bellinger pt->pscsi_result); 1362c66ac9dbSNicholas Bellinger task->task_scsi_status = SAM_STAT_CHECK_CONDITION; 1363c66ac9dbSNicholas Bellinger task->task_error_status = PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1364e3d6f909SAndy Grover task->task_se_cmd->transport_error_status = 1365c66ac9dbSNicholas Bellinger PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1366c66ac9dbSNicholas Bellinger transport_complete_task(task, 0); 1367c66ac9dbSNicholas Bellinger break; 1368c66ac9dbSNicholas Bellinger } 1369c66ac9dbSNicholas Bellinger } 1370c66ac9dbSNicholas Bellinger 1371c66ac9dbSNicholas Bellinger static void pscsi_req_done(struct request *req, int uptodate) 1372c66ac9dbSNicholas Bellinger { 1373c66ac9dbSNicholas Bellinger struct se_task *task = req->end_io_data; 1374c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 1375c66ac9dbSNicholas Bellinger 1376c66ac9dbSNicholas Bellinger pt->pscsi_result = req->errors; 1377c66ac9dbSNicholas Bellinger pt->pscsi_resid = req->resid_len; 1378c66ac9dbSNicholas Bellinger 1379c66ac9dbSNicholas Bellinger pscsi_process_SAM_status(task, pt); 1380c66ac9dbSNicholas Bellinger /* 1381c66ac9dbSNicholas Bellinger * Release BIDI-READ if present 1382c66ac9dbSNicholas Bellinger */ 1383c66ac9dbSNicholas Bellinger if (req->next_rq != NULL) 1384c66ac9dbSNicholas Bellinger __blk_put_request(req->q, req->next_rq); 1385c66ac9dbSNicholas Bellinger 1386c66ac9dbSNicholas Bellinger __blk_put_request(req->q, req); 1387c66ac9dbSNicholas Bellinger pt->pscsi_req = NULL; 1388c66ac9dbSNicholas Bellinger } 1389c66ac9dbSNicholas Bellinger 1390c66ac9dbSNicholas Bellinger static struct se_subsystem_api pscsi_template = { 1391c66ac9dbSNicholas Bellinger .name = "pscsi", 1392c66ac9dbSNicholas Bellinger .owner = THIS_MODULE, 1393c66ac9dbSNicholas Bellinger .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV, 1394c66ac9dbSNicholas Bellinger .cdb_none = pscsi_CDB_none, 1395c66ac9dbSNicholas Bellinger .map_task_non_SG = pscsi_map_task_non_SG, 1396c66ac9dbSNicholas Bellinger .map_task_SG = pscsi_map_task_SG, 1397c66ac9dbSNicholas Bellinger .attach_hba = pscsi_attach_hba, 1398c66ac9dbSNicholas Bellinger .detach_hba = pscsi_detach_hba, 1399c66ac9dbSNicholas Bellinger .pmode_enable_hba = pscsi_pmode_enable_hba, 1400c66ac9dbSNicholas Bellinger .allocate_virtdevice = pscsi_allocate_virtdevice, 1401c66ac9dbSNicholas Bellinger .create_virtdevice = pscsi_create_virtdevice, 1402c66ac9dbSNicholas Bellinger .free_device = pscsi_free_device, 1403c66ac9dbSNicholas Bellinger .transport_complete = pscsi_transport_complete, 1404c66ac9dbSNicholas Bellinger .alloc_task = pscsi_alloc_task, 1405c66ac9dbSNicholas Bellinger .do_task = pscsi_do_task, 1406c66ac9dbSNicholas Bellinger .free_task = pscsi_free_task, 1407c66ac9dbSNicholas Bellinger .check_configfs_dev_params = pscsi_check_configfs_dev_params, 1408c66ac9dbSNicholas Bellinger .set_configfs_dev_params = pscsi_set_configfs_dev_params, 1409c66ac9dbSNicholas Bellinger .show_configfs_dev_params = pscsi_show_configfs_dev_params, 1410c66ac9dbSNicholas Bellinger .get_cdb = pscsi_get_cdb, 1411c66ac9dbSNicholas Bellinger .get_sense_buffer = pscsi_get_sense_buffer, 1412c66ac9dbSNicholas Bellinger .get_device_rev = pscsi_get_device_rev, 1413c66ac9dbSNicholas Bellinger .get_device_type = pscsi_get_device_type, 1414c66ac9dbSNicholas Bellinger .get_blocks = pscsi_get_blocks, 1415c66ac9dbSNicholas Bellinger }; 1416c66ac9dbSNicholas Bellinger 1417c66ac9dbSNicholas Bellinger static int __init pscsi_module_init(void) 1418c66ac9dbSNicholas Bellinger { 1419c66ac9dbSNicholas Bellinger return transport_subsystem_register(&pscsi_template); 1420c66ac9dbSNicholas Bellinger } 1421c66ac9dbSNicholas Bellinger 1422c66ac9dbSNicholas Bellinger static void pscsi_module_exit(void) 1423c66ac9dbSNicholas Bellinger { 1424c66ac9dbSNicholas Bellinger transport_subsystem_release(&pscsi_template); 1425c66ac9dbSNicholas Bellinger } 1426c66ac9dbSNicholas Bellinger 1427c66ac9dbSNicholas Bellinger MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); 1428c66ac9dbSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 1429c66ac9dbSNicholas Bellinger MODULE_LICENSE("GPL"); 1430c66ac9dbSNicholas Bellinger 1431c66ac9dbSNicholas Bellinger module_init(pscsi_module_init); 1432c66ac9dbSNicholas Bellinger module_exit(pscsi_module_exit); 1433