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> 44c66ac9dbSNicholas Bellinger #include <scsi/libsas.h> /* For TASK_ATTR_* */ 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_get_sh(): 59c66ac9dbSNicholas Bellinger * 60c66ac9dbSNicholas Bellinger * 61c66ac9dbSNicholas Bellinger */ 62c66ac9dbSNicholas Bellinger static struct Scsi_Host *pscsi_get_sh(u32 host_no) 63c66ac9dbSNicholas Bellinger { 64c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = NULL; 65c66ac9dbSNicholas Bellinger 66c66ac9dbSNicholas Bellinger sh = scsi_host_lookup(host_no); 67c66ac9dbSNicholas Bellinger if (IS_ERR(sh)) { 68c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to locate SCSI HBA with Host ID:" 69c66ac9dbSNicholas Bellinger " %u\n", host_no); 70c66ac9dbSNicholas Bellinger return NULL; 71c66ac9dbSNicholas Bellinger } 72c66ac9dbSNicholas Bellinger 73c66ac9dbSNicholas Bellinger return sh; 74c66ac9dbSNicholas Bellinger } 75c66ac9dbSNicholas Bellinger 76c66ac9dbSNicholas Bellinger /* pscsi_attach_hba(): 77c66ac9dbSNicholas Bellinger * 78c66ac9dbSNicholas Bellinger * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. 79c66ac9dbSNicholas Bellinger * from the passed SCSI Host ID. 80c66ac9dbSNicholas Bellinger */ 81c66ac9dbSNicholas Bellinger static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) 82c66ac9dbSNicholas Bellinger { 83c66ac9dbSNicholas Bellinger int hba_depth; 84c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv; 85c66ac9dbSNicholas Bellinger 86c66ac9dbSNicholas Bellinger phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); 87c66ac9dbSNicholas Bellinger if (!(phv)) { 88c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate struct pscsi_hba_virt\n"); 89c66ac9dbSNicholas Bellinger return -1; 90c66ac9dbSNicholas Bellinger } 91c66ac9dbSNicholas Bellinger phv->phv_host_id = host_id; 92c66ac9dbSNicholas Bellinger phv->phv_mode = PHV_VIRUTAL_HOST_ID; 93c66ac9dbSNicholas Bellinger hba_depth = PSCSI_VIRTUAL_HBA_DEPTH; 94c66ac9dbSNicholas Bellinger atomic_set(&hba->left_queue_depth, hba_depth); 95c66ac9dbSNicholas Bellinger atomic_set(&hba->max_queue_depth, hba_depth); 96c66ac9dbSNicholas Bellinger 97c66ac9dbSNicholas Bellinger hba->hba_ptr = (void *)phv; 98c66ac9dbSNicholas Bellinger 99c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_HBA[%d] - TCM SCSI HBA Driver %s on" 100c66ac9dbSNicholas Bellinger " Generic Target Core Stack %s\n", hba->hba_id, 101c66ac9dbSNicholas Bellinger PSCSI_VERSION, TARGET_CORE_MOD_VERSION); 102c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_HBA[%d] - Attached SCSI HBA to Generic" 103c66ac9dbSNicholas Bellinger " Target Core with TCQ Depth: %d\n", hba->hba_id, 104c66ac9dbSNicholas Bellinger atomic_read(&hba->max_queue_depth)); 105c66ac9dbSNicholas Bellinger 106c66ac9dbSNicholas Bellinger return 0; 107c66ac9dbSNicholas Bellinger } 108c66ac9dbSNicholas Bellinger 109c66ac9dbSNicholas Bellinger static void pscsi_detach_hba(struct se_hba *hba) 110c66ac9dbSNicholas Bellinger { 111c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 112c66ac9dbSNicholas Bellinger struct Scsi_Host *scsi_host = phv->phv_lld_host; 113c66ac9dbSNicholas Bellinger 114c66ac9dbSNicholas Bellinger if (scsi_host) { 115c66ac9dbSNicholas Bellinger scsi_host_put(scsi_host); 116c66ac9dbSNicholas Bellinger 117c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_HBA[%d] - Detached SCSI HBA: %s from" 118c66ac9dbSNicholas Bellinger " Generic Target Core\n", hba->hba_id, 119c66ac9dbSNicholas Bellinger (scsi_host->hostt->name) ? (scsi_host->hostt->name) : 120c66ac9dbSNicholas Bellinger "Unknown"); 121c66ac9dbSNicholas Bellinger } else 122c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_HBA[%d] - Detached Virtual SCSI HBA" 123c66ac9dbSNicholas Bellinger " from Generic Target Core\n", hba->hba_id); 124c66ac9dbSNicholas Bellinger 125c66ac9dbSNicholas Bellinger kfree(phv); 126c66ac9dbSNicholas Bellinger hba->hba_ptr = NULL; 127c66ac9dbSNicholas Bellinger } 128c66ac9dbSNicholas Bellinger 129c66ac9dbSNicholas Bellinger static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) 130c66ac9dbSNicholas Bellinger { 131c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)hba->hba_ptr; 132c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 133c66ac9dbSNicholas Bellinger int hba_depth = PSCSI_VIRTUAL_HBA_DEPTH; 134c66ac9dbSNicholas Bellinger /* 135c66ac9dbSNicholas Bellinger * Release the struct Scsi_Host 136c66ac9dbSNicholas Bellinger */ 137c66ac9dbSNicholas Bellinger if (!(mode_flag)) { 138c66ac9dbSNicholas Bellinger if (!(sh)) 139c66ac9dbSNicholas Bellinger return 0; 140c66ac9dbSNicholas Bellinger 141c66ac9dbSNicholas Bellinger phv->phv_lld_host = NULL; 142c66ac9dbSNicholas Bellinger phv->phv_mode = PHV_VIRUTAL_HOST_ID; 143c66ac9dbSNicholas Bellinger atomic_set(&hba->left_queue_depth, hba_depth); 144c66ac9dbSNicholas Bellinger atomic_set(&hba->max_queue_depth, hba_depth); 145c66ac9dbSNicholas Bellinger 146c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" 147c66ac9dbSNicholas Bellinger " %s\n", hba->hba_id, (sh->hostt->name) ? 148c66ac9dbSNicholas Bellinger (sh->hostt->name) : "Unknown"); 149c66ac9dbSNicholas Bellinger 150c66ac9dbSNicholas Bellinger scsi_host_put(sh); 151c66ac9dbSNicholas Bellinger return 0; 152c66ac9dbSNicholas Bellinger } 153c66ac9dbSNicholas Bellinger /* 154c66ac9dbSNicholas Bellinger * Otherwise, locate struct Scsi_Host from the original passed 155c66ac9dbSNicholas Bellinger * pSCSI Host ID and enable for phba mode 156c66ac9dbSNicholas Bellinger */ 157c66ac9dbSNicholas Bellinger sh = pscsi_get_sh(phv->phv_host_id); 158c66ac9dbSNicholas Bellinger if (!(sh)) { 159c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: Unable to locate SCSI Host for" 160c66ac9dbSNicholas Bellinger " phv_host_id: %d\n", phv->phv_host_id); 161c66ac9dbSNicholas Bellinger return -1; 162c66ac9dbSNicholas Bellinger } 163c66ac9dbSNicholas Bellinger /* 164c66ac9dbSNicholas Bellinger * Usually the SCSI LLD will use the hostt->can_queue value to define 165c66ac9dbSNicholas Bellinger * its HBA TCQ depth. Some other drivers (like 2.6 megaraid) don't set 166c66ac9dbSNicholas Bellinger * this at all and set sh->can_queue at runtime. 167c66ac9dbSNicholas Bellinger */ 168c66ac9dbSNicholas Bellinger hba_depth = (sh->hostt->can_queue > sh->can_queue) ? 169c66ac9dbSNicholas Bellinger sh->hostt->can_queue : sh->can_queue; 170c66ac9dbSNicholas Bellinger 171c66ac9dbSNicholas Bellinger atomic_set(&hba->left_queue_depth, hba_depth); 172c66ac9dbSNicholas Bellinger atomic_set(&hba->max_queue_depth, hba_depth); 173c66ac9dbSNicholas Bellinger 174c66ac9dbSNicholas Bellinger phv->phv_lld_host = sh; 175c66ac9dbSNicholas Bellinger phv->phv_mode = PHV_LLD_SCSI_HOST_NO; 176c66ac9dbSNicholas Bellinger 177c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", 178c66ac9dbSNicholas Bellinger hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); 179c66ac9dbSNicholas Bellinger 180c66ac9dbSNicholas Bellinger return 1; 181c66ac9dbSNicholas Bellinger } 182c66ac9dbSNicholas Bellinger 183c66ac9dbSNicholas Bellinger static void pscsi_tape_read_blocksize(struct se_device *dev, 184c66ac9dbSNicholas Bellinger struct scsi_device *sdev) 185c66ac9dbSNicholas Bellinger { 186c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 187c66ac9dbSNicholas Bellinger int ret; 188c66ac9dbSNicholas Bellinger 189c66ac9dbSNicholas Bellinger buf = kzalloc(12, GFP_KERNEL); 190c66ac9dbSNicholas Bellinger if (!buf) 191c66ac9dbSNicholas Bellinger return; 192c66ac9dbSNicholas Bellinger 193c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 194c66ac9dbSNicholas Bellinger cdb[0] = MODE_SENSE; 195c66ac9dbSNicholas Bellinger cdb[4] = 0x0c; /* 12 bytes */ 196c66ac9dbSNicholas Bellinger 197c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, 198c66ac9dbSNicholas Bellinger HZ, 1, NULL); 199c66ac9dbSNicholas Bellinger if (ret) 200c66ac9dbSNicholas Bellinger goto out_free; 201c66ac9dbSNicholas Bellinger 202c66ac9dbSNicholas Bellinger /* 203c66ac9dbSNicholas Bellinger * If MODE_SENSE still returns zero, set the default value to 1024. 204c66ac9dbSNicholas Bellinger */ 205c66ac9dbSNicholas Bellinger sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); 206c66ac9dbSNicholas Bellinger if (!sdev->sector_size) 207c66ac9dbSNicholas Bellinger sdev->sector_size = 1024; 208c66ac9dbSNicholas Bellinger out_free: 209c66ac9dbSNicholas Bellinger kfree(buf); 210c66ac9dbSNicholas Bellinger } 211c66ac9dbSNicholas Bellinger 212c66ac9dbSNicholas Bellinger static void 213c66ac9dbSNicholas Bellinger pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) 214c66ac9dbSNicholas Bellinger { 215c66ac9dbSNicholas Bellinger unsigned char *buf; 216c66ac9dbSNicholas Bellinger 217c66ac9dbSNicholas Bellinger if (sdev->inquiry_len < INQUIRY_LEN) 218c66ac9dbSNicholas Bellinger return; 219c66ac9dbSNicholas Bellinger 220c66ac9dbSNicholas Bellinger buf = sdev->inquiry; 221c66ac9dbSNicholas Bellinger if (!buf) 222c66ac9dbSNicholas Bellinger return; 223c66ac9dbSNicholas Bellinger /* 224c66ac9dbSNicholas Bellinger * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() 225c66ac9dbSNicholas Bellinger */ 226c66ac9dbSNicholas Bellinger memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); 227c66ac9dbSNicholas Bellinger memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); 228c66ac9dbSNicholas Bellinger memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); 229c66ac9dbSNicholas Bellinger } 230c66ac9dbSNicholas Bellinger 231c66ac9dbSNicholas Bellinger static int 232c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) 233c66ac9dbSNicholas Bellinger { 234c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf; 235c66ac9dbSNicholas Bellinger int ret; 236c66ac9dbSNicholas Bellinger 237c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 238c66ac9dbSNicholas Bellinger if (!buf) 239c66ac9dbSNicholas Bellinger return -1; 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] = 0x80; /* Unit Serial Number */ 245c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; 246c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); 247c66ac9dbSNicholas Bellinger 248c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 249c66ac9dbSNicholas Bellinger INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); 250c66ac9dbSNicholas Bellinger if (ret) 251c66ac9dbSNicholas Bellinger goto out_free; 252c66ac9dbSNicholas Bellinger 253c66ac9dbSNicholas Bellinger snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); 254c66ac9dbSNicholas Bellinger 255c66ac9dbSNicholas Bellinger wwn->t10_sub_dev->su_dev_flags |= SDF_FIRMWARE_VPD_UNIT_SERIAL; 256c66ac9dbSNicholas Bellinger 257c66ac9dbSNicholas Bellinger kfree(buf); 258c66ac9dbSNicholas Bellinger return 0; 259c66ac9dbSNicholas Bellinger 260c66ac9dbSNicholas Bellinger out_free: 261c66ac9dbSNicholas Bellinger kfree(buf); 262c66ac9dbSNicholas Bellinger return -1; 263c66ac9dbSNicholas Bellinger } 264c66ac9dbSNicholas Bellinger 265c66ac9dbSNicholas Bellinger static void 266c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, 267c66ac9dbSNicholas Bellinger struct t10_wwn *wwn) 268c66ac9dbSNicholas Bellinger { 269c66ac9dbSNicholas Bellinger unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; 270c66ac9dbSNicholas Bellinger int ident_len, page_len, off = 4, ret; 271c66ac9dbSNicholas Bellinger struct t10_vpd *vpd; 272c66ac9dbSNicholas Bellinger 273c66ac9dbSNicholas Bellinger buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 274c66ac9dbSNicholas Bellinger if (!buf) 275c66ac9dbSNicholas Bellinger return; 276c66ac9dbSNicholas Bellinger 277c66ac9dbSNicholas Bellinger memset(cdb, 0, MAX_COMMAND_SIZE); 278c66ac9dbSNicholas Bellinger cdb[0] = INQUIRY; 279c66ac9dbSNicholas Bellinger cdb[1] = 0x01; /* Query VPD */ 280c66ac9dbSNicholas Bellinger cdb[2] = 0x83; /* Device Identifier */ 281c66ac9dbSNicholas Bellinger cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; 282c66ac9dbSNicholas Bellinger cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); 283c66ac9dbSNicholas Bellinger 284c66ac9dbSNicholas Bellinger ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 285c66ac9dbSNicholas Bellinger INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, 286c66ac9dbSNicholas Bellinger NULL, HZ, 1, NULL); 287c66ac9dbSNicholas Bellinger if (ret) 288c66ac9dbSNicholas Bellinger goto out; 289c66ac9dbSNicholas Bellinger 290c66ac9dbSNicholas Bellinger page_len = (buf[2] << 8) | buf[3]; 291c66ac9dbSNicholas Bellinger while (page_len > 0) { 292c66ac9dbSNicholas Bellinger /* Grab a pointer to the Identification descriptor */ 293c66ac9dbSNicholas Bellinger page_83 = &buf[off]; 294c66ac9dbSNicholas Bellinger ident_len = page_83[3]; 295c66ac9dbSNicholas Bellinger if (!ident_len) { 296c66ac9dbSNicholas Bellinger printk(KERN_ERR "page_83[3]: identifier" 297c66ac9dbSNicholas Bellinger " length zero!\n"); 298c66ac9dbSNicholas Bellinger break; 299c66ac9dbSNicholas Bellinger } 300c66ac9dbSNicholas Bellinger printk(KERN_INFO "T10 VPD Identifer Length: %d\n", ident_len); 301c66ac9dbSNicholas Bellinger 302c66ac9dbSNicholas Bellinger vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); 303c66ac9dbSNicholas Bellinger if (!vpd) { 304c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate memory for" 305c66ac9dbSNicholas Bellinger " struct t10_vpd\n"); 306c66ac9dbSNicholas Bellinger goto out; 307c66ac9dbSNicholas Bellinger } 308c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&vpd->vpd_list); 309c66ac9dbSNicholas Bellinger 310c66ac9dbSNicholas Bellinger transport_set_vpd_proto_id(vpd, page_83); 311c66ac9dbSNicholas Bellinger transport_set_vpd_assoc(vpd, page_83); 312c66ac9dbSNicholas Bellinger 313c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident_type(vpd, page_83) < 0) { 314c66ac9dbSNicholas Bellinger off += (ident_len + 4); 315c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 316c66ac9dbSNicholas Bellinger kfree(vpd); 317c66ac9dbSNicholas Bellinger continue; 318c66ac9dbSNicholas Bellinger } 319c66ac9dbSNicholas Bellinger if (transport_set_vpd_ident(vpd, page_83) < 0) { 320c66ac9dbSNicholas Bellinger off += (ident_len + 4); 321c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 322c66ac9dbSNicholas Bellinger kfree(vpd); 323c66ac9dbSNicholas Bellinger continue; 324c66ac9dbSNicholas Bellinger } 325c66ac9dbSNicholas Bellinger 326c66ac9dbSNicholas Bellinger list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); 327c66ac9dbSNicholas Bellinger off += (ident_len + 4); 328c66ac9dbSNicholas Bellinger page_len -= (ident_len + 4); 329c66ac9dbSNicholas Bellinger } 330c66ac9dbSNicholas Bellinger 331c66ac9dbSNicholas Bellinger out: 332c66ac9dbSNicholas Bellinger kfree(buf); 333c66ac9dbSNicholas Bellinger } 334c66ac9dbSNicholas Bellinger 335c66ac9dbSNicholas Bellinger /* pscsi_add_device_to_list(): 336c66ac9dbSNicholas Bellinger * 337c66ac9dbSNicholas Bellinger * 338c66ac9dbSNicholas Bellinger */ 339c66ac9dbSNicholas Bellinger static struct se_device *pscsi_add_device_to_list( 340c66ac9dbSNicholas Bellinger struct se_hba *hba, 341c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 342c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 343c66ac9dbSNicholas Bellinger struct scsi_device *sd, 344c66ac9dbSNicholas Bellinger int dev_flags) 345c66ac9dbSNicholas Bellinger { 346c66ac9dbSNicholas Bellinger struct se_device *dev; 347c66ac9dbSNicholas Bellinger struct se_dev_limits dev_limits; 348c66ac9dbSNicholas Bellinger struct request_queue *q; 349c66ac9dbSNicholas Bellinger struct queue_limits *limits; 350c66ac9dbSNicholas Bellinger 351c66ac9dbSNicholas Bellinger memset(&dev_limits, 0, sizeof(struct se_dev_limits)); 352c66ac9dbSNicholas Bellinger 353c66ac9dbSNicholas Bellinger if (!sd->queue_depth) { 354c66ac9dbSNicholas Bellinger sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; 355c66ac9dbSNicholas Bellinger 356c66ac9dbSNicholas Bellinger printk(KERN_ERR "Set broken SCSI Device %d:%d:%d" 357c66ac9dbSNicholas Bellinger " queue_depth to %d\n", sd->channel, sd->id, 358c66ac9dbSNicholas Bellinger sd->lun, sd->queue_depth); 359c66ac9dbSNicholas Bellinger } 360c66ac9dbSNicholas Bellinger /* 361c66ac9dbSNicholas Bellinger * Setup the local scope queue_limits from struct request_queue->limits 362c66ac9dbSNicholas Bellinger * to pass into transport_add_device_to_core_hba() as struct se_dev_limits. 363c66ac9dbSNicholas Bellinger */ 364c66ac9dbSNicholas Bellinger q = sd->request_queue; 365c66ac9dbSNicholas Bellinger limits = &dev_limits.limits; 366c66ac9dbSNicholas Bellinger limits->logical_block_size = sd->sector_size; 367c66ac9dbSNicholas Bellinger limits->max_hw_sectors = (sd->host->max_sectors > queue_max_hw_sectors(q)) ? 368c66ac9dbSNicholas Bellinger queue_max_hw_sectors(q) : sd->host->max_sectors; 369c66ac9dbSNicholas Bellinger limits->max_sectors = (sd->host->max_sectors > queue_max_sectors(q)) ? 370c66ac9dbSNicholas Bellinger queue_max_sectors(q) : sd->host->max_sectors; 371c66ac9dbSNicholas Bellinger dev_limits.hw_queue_depth = sd->queue_depth; 372c66ac9dbSNicholas Bellinger dev_limits.queue_depth = sd->queue_depth; 373c66ac9dbSNicholas Bellinger /* 374c66ac9dbSNicholas Bellinger * Setup our standard INQUIRY info into se_dev->t10_wwn 375c66ac9dbSNicholas Bellinger */ 376c66ac9dbSNicholas Bellinger pscsi_set_inquiry_info(sd, &se_dev->t10_wwn); 377c66ac9dbSNicholas Bellinger 378c66ac9dbSNicholas Bellinger /* 379c66ac9dbSNicholas Bellinger * Set the pointer pdv->pdv_sd to from passed struct scsi_device, 380c66ac9dbSNicholas Bellinger * which has already been referenced with Linux SCSI code with 381c66ac9dbSNicholas Bellinger * scsi_device_get() in this file's pscsi_create_virtdevice(). 382c66ac9dbSNicholas Bellinger * 383c66ac9dbSNicholas Bellinger * The passthrough operations called by the transport_add_device_* 384c66ac9dbSNicholas Bellinger * function below will require this pointer to be set for passthroug 385c66ac9dbSNicholas Bellinger * ops. 386c66ac9dbSNicholas Bellinger * 387c66ac9dbSNicholas Bellinger * For the shutdown case in pscsi_free_device(), this struct 388c66ac9dbSNicholas Bellinger * scsi_device reference is released with Linux SCSI code 389c66ac9dbSNicholas Bellinger * scsi_device_put() and the pdv->pdv_sd cleared. 390c66ac9dbSNicholas Bellinger */ 391c66ac9dbSNicholas Bellinger pdv->pdv_sd = sd; 392c66ac9dbSNicholas Bellinger 393c66ac9dbSNicholas Bellinger dev = transport_add_device_to_core_hba(hba, &pscsi_template, 394c66ac9dbSNicholas Bellinger se_dev, dev_flags, (void *)pdv, 395c66ac9dbSNicholas Bellinger &dev_limits, NULL, NULL); 396c66ac9dbSNicholas Bellinger if (!(dev)) { 397c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 398c66ac9dbSNicholas Bellinger return NULL; 399c66ac9dbSNicholas Bellinger } 400c66ac9dbSNicholas Bellinger 401c66ac9dbSNicholas Bellinger /* 402c66ac9dbSNicholas Bellinger * Locate VPD WWN Information used for various purposes within 403c66ac9dbSNicholas Bellinger * the Storage Engine. 404c66ac9dbSNicholas Bellinger */ 405c66ac9dbSNicholas Bellinger if (!pscsi_get_inquiry_vpd_serial(sd, &se_dev->t10_wwn)) { 406c66ac9dbSNicholas Bellinger /* 407c66ac9dbSNicholas Bellinger * If VPD Unit Serial returned GOOD status, try 408c66ac9dbSNicholas Bellinger * VPD Device Identification page (0x83). 409c66ac9dbSNicholas Bellinger */ 410c66ac9dbSNicholas Bellinger pscsi_get_inquiry_vpd_device_ident(sd, &se_dev->t10_wwn); 411c66ac9dbSNicholas Bellinger } 412c66ac9dbSNicholas Bellinger 413c66ac9dbSNicholas Bellinger /* 414c66ac9dbSNicholas Bellinger * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. 415c66ac9dbSNicholas Bellinger */ 416c66ac9dbSNicholas Bellinger if (sd->type == TYPE_TAPE) 417c66ac9dbSNicholas Bellinger pscsi_tape_read_blocksize(dev, sd); 418c66ac9dbSNicholas Bellinger return dev; 419c66ac9dbSNicholas Bellinger } 420c66ac9dbSNicholas Bellinger 421c66ac9dbSNicholas Bellinger static void *pscsi_allocate_virtdevice(struct se_hba *hba, const char *name) 422c66ac9dbSNicholas Bellinger { 423c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv; 424c66ac9dbSNicholas Bellinger 425c66ac9dbSNicholas Bellinger pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); 426c66ac9dbSNicholas Bellinger if (!(pdv)) { 427c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate memory for struct pscsi_dev_virt\n"); 428c66ac9dbSNicholas Bellinger return NULL; 429c66ac9dbSNicholas Bellinger } 430c66ac9dbSNicholas Bellinger pdv->pdv_se_hba = hba; 431c66ac9dbSNicholas Bellinger 432c66ac9dbSNicholas Bellinger printk(KERN_INFO "PSCSI: Allocated pdv: %p for %s\n", pdv, name); 433c66ac9dbSNicholas Bellinger return (void *)pdv; 434c66ac9dbSNicholas Bellinger } 435c66ac9dbSNicholas Bellinger 436c66ac9dbSNicholas Bellinger /* 437c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 438c66ac9dbSNicholas Bellinger */ 439c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_type_disk( 440c66ac9dbSNicholas Bellinger struct scsi_device *sd, 441c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 442c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 443c66ac9dbSNicholas Bellinger struct se_hba *hba) 444c66ac9dbSNicholas Bellinger { 445c66ac9dbSNicholas Bellinger struct se_device *dev; 446c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)pdv->pdv_se_hba->hba_ptr; 447c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 448c66ac9dbSNicholas Bellinger struct block_device *bd; 449c66ac9dbSNicholas Bellinger u32 dev_flags = 0; 450c66ac9dbSNicholas Bellinger 451c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 452c66ac9dbSNicholas Bellinger printk(KERN_ERR "scsi_device_get() failed for %d:%d:%d:%d\n", 453c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 454c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 455c66ac9dbSNicholas Bellinger return NULL; 456c66ac9dbSNicholas Bellinger } 457c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 458c66ac9dbSNicholas Bellinger /* 459c66ac9dbSNicholas Bellinger * Claim exclusive struct block_device access to struct scsi_device 460c66ac9dbSNicholas Bellinger * for TYPE_DISK using supplied udev_path 461c66ac9dbSNicholas Bellinger */ 462c66ac9dbSNicholas Bellinger bd = blkdev_get_by_path(se_dev->se_dev_udev_path, 463c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); 4643ae279d2SDan Carpenter if (IS_ERR(bd)) { 4653ae279d2SDan Carpenter printk(KERN_ERR "pSCSI: blkdev_get_by_path() failed\n"); 466c66ac9dbSNicholas Bellinger scsi_device_put(sd); 467c66ac9dbSNicholas Bellinger return NULL; 468c66ac9dbSNicholas Bellinger } 469c66ac9dbSNicholas Bellinger pdv->pdv_bd = bd; 470c66ac9dbSNicholas Bellinger 471c66ac9dbSNicholas Bellinger dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); 472c66ac9dbSNicholas Bellinger if (!(dev)) { 473c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); 474c66ac9dbSNicholas Bellinger scsi_device_put(sd); 475c66ac9dbSNicholas Bellinger return NULL; 476c66ac9dbSNicholas Bellinger } 477c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%d\n", 478c66ac9dbSNicholas Bellinger phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); 479c66ac9dbSNicholas Bellinger 480c66ac9dbSNicholas Bellinger return dev; 481c66ac9dbSNicholas Bellinger } 482c66ac9dbSNicholas Bellinger 483c66ac9dbSNicholas Bellinger /* 484c66ac9dbSNicholas Bellinger * Called with struct Scsi_Host->host_lock called. 485c66ac9dbSNicholas Bellinger */ 486c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_type_rom( 487c66ac9dbSNicholas Bellinger struct scsi_device *sd, 488c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 489c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 490c66ac9dbSNicholas Bellinger struct se_hba *hba) 491c66ac9dbSNicholas Bellinger { 492c66ac9dbSNicholas Bellinger struct se_device *dev; 493c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)pdv->pdv_se_hba->hba_ptr; 494c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 495c66ac9dbSNicholas Bellinger u32 dev_flags = 0; 496c66ac9dbSNicholas Bellinger 497c66ac9dbSNicholas Bellinger if (scsi_device_get(sd)) { 498c66ac9dbSNicholas Bellinger printk(KERN_ERR "scsi_device_get() failed for %d:%d:%d:%d\n", 499c66ac9dbSNicholas Bellinger sh->host_no, sd->channel, sd->id, sd->lun); 500c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 501c66ac9dbSNicholas Bellinger return NULL; 502c66ac9dbSNicholas Bellinger } 503c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 504c66ac9dbSNicholas Bellinger 505c66ac9dbSNicholas Bellinger dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); 506c66ac9dbSNicholas Bellinger if (!(dev)) { 507c66ac9dbSNicholas Bellinger scsi_device_put(sd); 508c66ac9dbSNicholas Bellinger return NULL; 509c66ac9dbSNicholas Bellinger } 510c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", 511c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 512c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 513c66ac9dbSNicholas Bellinger 514c66ac9dbSNicholas Bellinger return dev; 515c66ac9dbSNicholas Bellinger } 516c66ac9dbSNicholas Bellinger 517c66ac9dbSNicholas Bellinger /* 518c66ac9dbSNicholas Bellinger *Called with struct Scsi_Host->host_lock called. 519c66ac9dbSNicholas Bellinger */ 520c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_type_other( 521c66ac9dbSNicholas Bellinger struct scsi_device *sd, 522c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv, 523c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 524c66ac9dbSNicholas Bellinger struct se_hba *hba) 525c66ac9dbSNicholas Bellinger { 526c66ac9dbSNicholas Bellinger struct se_device *dev; 527c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)pdv->pdv_se_hba->hba_ptr; 528c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = sd->host; 529c66ac9dbSNicholas Bellinger u32 dev_flags = 0; 530c66ac9dbSNicholas Bellinger 531c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 532c66ac9dbSNicholas Bellinger dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); 533c66ac9dbSNicholas Bellinger if (!(dev)) 534c66ac9dbSNicholas Bellinger return NULL; 535c66ac9dbSNicholas Bellinger 536c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", 537c66ac9dbSNicholas Bellinger phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 538c66ac9dbSNicholas Bellinger sd->channel, sd->id, sd->lun); 539c66ac9dbSNicholas Bellinger 540c66ac9dbSNicholas Bellinger return dev; 541c66ac9dbSNicholas Bellinger } 542c66ac9dbSNicholas Bellinger 543c66ac9dbSNicholas Bellinger static struct se_device *pscsi_create_virtdevice( 544c66ac9dbSNicholas Bellinger struct se_hba *hba, 545c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 546c66ac9dbSNicholas Bellinger void *p) 547c66ac9dbSNicholas Bellinger { 548c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = (struct pscsi_dev_virt *)p; 549c66ac9dbSNicholas Bellinger struct se_device *dev; 550c66ac9dbSNicholas Bellinger struct scsi_device *sd; 551c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)hba->hba_ptr; 552c66ac9dbSNicholas Bellinger struct Scsi_Host *sh = phv->phv_lld_host; 553c66ac9dbSNicholas Bellinger int legacy_mode_enable = 0; 554c66ac9dbSNicholas Bellinger 555c66ac9dbSNicholas Bellinger if (!(pdv)) { 556c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to locate struct pscsi_dev_virt" 557c66ac9dbSNicholas Bellinger " parameter\n"); 558613640e4SNicholas Bellinger return ERR_PTR(-EINVAL); 559c66ac9dbSNicholas Bellinger } 560c66ac9dbSNicholas Bellinger /* 561c66ac9dbSNicholas Bellinger * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the 562c66ac9dbSNicholas Bellinger * struct Scsi_Host we will need to bring the TCM/pSCSI object online 563c66ac9dbSNicholas Bellinger */ 564c66ac9dbSNicholas Bellinger if (!(sh)) { 565c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 566c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: Unable to locate struct" 567c66ac9dbSNicholas Bellinger " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); 568613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 569c66ac9dbSNicholas Bellinger } 570c66ac9dbSNicholas Bellinger /* 571c66ac9dbSNicholas Bellinger * For the newer PHV_VIRUTAL_HOST_ID struct scsi_device 572c66ac9dbSNicholas Bellinger * reference, we enforce that udev_path has been set 573c66ac9dbSNicholas Bellinger */ 574c66ac9dbSNicholas Bellinger if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) { 575c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: udev_path attribute has not" 576c66ac9dbSNicholas Bellinger " been set before ENABLE=1\n"); 577613640e4SNicholas Bellinger return ERR_PTR(-EINVAL); 578c66ac9dbSNicholas Bellinger } 579c66ac9dbSNicholas Bellinger /* 580c66ac9dbSNicholas Bellinger * If no scsi_host_id= was passed for PHV_VIRUTAL_HOST_ID, 581c66ac9dbSNicholas Bellinger * use the original TCM hba ID to reference Linux/SCSI Host No 582c66ac9dbSNicholas Bellinger * and enable for PHV_LLD_SCSI_HOST_NO mode. 583c66ac9dbSNicholas Bellinger */ 584c66ac9dbSNicholas Bellinger if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { 585c66ac9dbSNicholas Bellinger spin_lock(&hba->device_lock); 586c66ac9dbSNicholas Bellinger if (!(list_empty(&hba->hba_dev_list))) { 587c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: Unable to set hba_mode" 588c66ac9dbSNicholas Bellinger " with active devices\n"); 589c66ac9dbSNicholas Bellinger spin_unlock(&hba->device_lock); 590613640e4SNicholas Bellinger return ERR_PTR(-EEXIST); 591c66ac9dbSNicholas Bellinger } 592c66ac9dbSNicholas Bellinger spin_unlock(&hba->device_lock); 593c66ac9dbSNicholas Bellinger 594c66ac9dbSNicholas Bellinger if (pscsi_pmode_enable_hba(hba, 1) != 1) 595613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 596c66ac9dbSNicholas Bellinger 597c66ac9dbSNicholas Bellinger legacy_mode_enable = 1; 598c66ac9dbSNicholas Bellinger hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 599c66ac9dbSNicholas Bellinger sh = phv->phv_lld_host; 600c66ac9dbSNicholas Bellinger } else { 601c66ac9dbSNicholas Bellinger sh = pscsi_get_sh(pdv->pdv_host_id); 602c66ac9dbSNicholas Bellinger if (!(sh)) { 603c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: Unable to locate" 604c66ac9dbSNicholas Bellinger " pdv_host_id: %d\n", pdv->pdv_host_id); 605613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 606c66ac9dbSNicholas Bellinger } 607c66ac9dbSNicholas Bellinger } 608c66ac9dbSNicholas Bellinger } else { 609c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) { 610c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: PHV_VIRUTAL_HOST_ID set while" 611c66ac9dbSNicholas Bellinger " struct Scsi_Host exists\n"); 612613640e4SNicholas Bellinger return ERR_PTR(-EEXIST); 613c66ac9dbSNicholas Bellinger } 614c66ac9dbSNicholas Bellinger } 615c66ac9dbSNicholas Bellinger 616c66ac9dbSNicholas Bellinger spin_lock_irq(sh->host_lock); 617c66ac9dbSNicholas Bellinger list_for_each_entry(sd, &sh->__devices, siblings) { 618c66ac9dbSNicholas Bellinger if ((pdv->pdv_channel_id != sd->channel) || 619c66ac9dbSNicholas Bellinger (pdv->pdv_target_id != sd->id) || 620c66ac9dbSNicholas Bellinger (pdv->pdv_lun_id != sd->lun)) 621c66ac9dbSNicholas Bellinger continue; 622c66ac9dbSNicholas Bellinger /* 623c66ac9dbSNicholas Bellinger * Functions will release the held struct scsi_host->host_lock 624c66ac9dbSNicholas Bellinger * before calling calling pscsi_add_device_to_list() to register 625c66ac9dbSNicholas Bellinger * struct scsi_device with target_core_mod. 626c66ac9dbSNicholas Bellinger */ 627c66ac9dbSNicholas Bellinger switch (sd->type) { 628c66ac9dbSNicholas Bellinger case TYPE_DISK: 629c66ac9dbSNicholas Bellinger dev = pscsi_create_type_disk(sd, pdv, se_dev, hba); 630c66ac9dbSNicholas Bellinger break; 631c66ac9dbSNicholas Bellinger case TYPE_ROM: 632c66ac9dbSNicholas Bellinger dev = pscsi_create_type_rom(sd, pdv, se_dev, hba); 633c66ac9dbSNicholas Bellinger break; 634c66ac9dbSNicholas Bellinger default: 635c66ac9dbSNicholas Bellinger dev = pscsi_create_type_other(sd, pdv, se_dev, hba); 636c66ac9dbSNicholas Bellinger break; 637c66ac9dbSNicholas Bellinger } 638c66ac9dbSNicholas Bellinger 639c66ac9dbSNicholas Bellinger if (!(dev)) { 640c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) 641c66ac9dbSNicholas Bellinger scsi_host_put(sh); 642c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 643c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 644c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 645c66ac9dbSNicholas Bellinger } 646c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 647613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 648c66ac9dbSNicholas Bellinger } 649c66ac9dbSNicholas Bellinger return dev; 650c66ac9dbSNicholas Bellinger } 651c66ac9dbSNicholas Bellinger spin_unlock_irq(sh->host_lock); 652c66ac9dbSNicholas Bellinger 653c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, 654c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); 655c66ac9dbSNicholas Bellinger 656c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) 657c66ac9dbSNicholas Bellinger scsi_host_put(sh); 658c66ac9dbSNicholas Bellinger else if (legacy_mode_enable) { 659c66ac9dbSNicholas Bellinger pscsi_pmode_enable_hba(hba, 0); 660c66ac9dbSNicholas Bellinger hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 661c66ac9dbSNicholas Bellinger } 662c66ac9dbSNicholas Bellinger 663613640e4SNicholas Bellinger return ERR_PTR(-ENODEV); 664c66ac9dbSNicholas Bellinger } 665c66ac9dbSNicholas Bellinger 666c66ac9dbSNicholas Bellinger /* pscsi_free_device(): (Part of se_subsystem_api_t template) 667c66ac9dbSNicholas Bellinger * 668c66ac9dbSNicholas Bellinger * 669c66ac9dbSNicholas Bellinger */ 670c66ac9dbSNicholas Bellinger static void pscsi_free_device(void *p) 671c66ac9dbSNicholas Bellinger { 672c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = p; 673c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; 674c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 675c66ac9dbSNicholas Bellinger 676c66ac9dbSNicholas Bellinger if (sd) { 677c66ac9dbSNicholas Bellinger /* 678c66ac9dbSNicholas Bellinger * Release exclusive pSCSI internal struct block_device claim for 679c66ac9dbSNicholas Bellinger * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() 680c66ac9dbSNicholas Bellinger */ 681c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { 682c66ac9dbSNicholas Bellinger blkdev_put(pdv->pdv_bd, 683c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL); 684c66ac9dbSNicholas Bellinger pdv->pdv_bd = NULL; 685c66ac9dbSNicholas Bellinger } 686c66ac9dbSNicholas Bellinger /* 687c66ac9dbSNicholas Bellinger * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference 688c66ac9dbSNicholas Bellinger * to struct Scsi_Host now. 689c66ac9dbSNicholas Bellinger */ 690c66ac9dbSNicholas Bellinger if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && 691c66ac9dbSNicholas Bellinger (phv->phv_lld_host != NULL)) 692c66ac9dbSNicholas Bellinger scsi_host_put(phv->phv_lld_host); 693c66ac9dbSNicholas Bellinger 694c66ac9dbSNicholas Bellinger if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) 695c66ac9dbSNicholas Bellinger scsi_device_put(sd); 696c66ac9dbSNicholas Bellinger 697c66ac9dbSNicholas Bellinger pdv->pdv_sd = NULL; 698c66ac9dbSNicholas Bellinger } 699c66ac9dbSNicholas Bellinger 700c66ac9dbSNicholas Bellinger kfree(pdv); 701c66ac9dbSNicholas Bellinger } 702c66ac9dbSNicholas Bellinger 703c66ac9dbSNicholas Bellinger static inline struct pscsi_plugin_task *PSCSI_TASK(struct se_task *task) 704c66ac9dbSNicholas Bellinger { 705c66ac9dbSNicholas Bellinger return container_of(task, struct pscsi_plugin_task, pscsi_task); 706c66ac9dbSNicholas Bellinger } 707c66ac9dbSNicholas Bellinger 708c66ac9dbSNicholas Bellinger 709c66ac9dbSNicholas Bellinger /* pscsi_transport_complete(): 710c66ac9dbSNicholas Bellinger * 711c66ac9dbSNicholas Bellinger * 712c66ac9dbSNicholas Bellinger */ 713c66ac9dbSNicholas Bellinger static int pscsi_transport_complete(struct se_task *task) 714c66ac9dbSNicholas Bellinger { 715c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; 716c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 717c66ac9dbSNicholas Bellinger int result; 718c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 719c66ac9dbSNicholas Bellinger unsigned char *cdb = &pt->pscsi_cdb[0]; 720c66ac9dbSNicholas Bellinger 721c66ac9dbSNicholas Bellinger result = pt->pscsi_result; 722c66ac9dbSNicholas Bellinger /* 723c66ac9dbSNicholas Bellinger * Hack to make sure that Write-Protect modepage is set if R/O mode is 724c66ac9dbSNicholas Bellinger * forced. 725c66ac9dbSNicholas Bellinger */ 726c66ac9dbSNicholas Bellinger if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && 727c66ac9dbSNicholas Bellinger (status_byte(result) << 1) == SAM_STAT_GOOD) { 728c66ac9dbSNicholas Bellinger if (!TASK_CMD(task)->se_deve) 729c66ac9dbSNicholas Bellinger goto after_mode_sense; 730c66ac9dbSNicholas Bellinger 731c66ac9dbSNicholas Bellinger if (TASK_CMD(task)->se_deve->lun_flags & 732c66ac9dbSNicholas Bellinger TRANSPORT_LUNFLAGS_READ_ONLY) { 733c66ac9dbSNicholas Bellinger unsigned char *buf = (unsigned char *) 734c66ac9dbSNicholas Bellinger T_TASK(task->task_se_cmd)->t_task_buf; 735c66ac9dbSNicholas Bellinger 736c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SENSE_10) { 737c66ac9dbSNicholas Bellinger if (!(buf[3] & 0x80)) 738c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 739c66ac9dbSNicholas Bellinger } else { 740c66ac9dbSNicholas Bellinger if (!(buf[2] & 0x80)) 741c66ac9dbSNicholas Bellinger buf[2] |= 0x80; 742c66ac9dbSNicholas Bellinger } 743c66ac9dbSNicholas Bellinger } 744c66ac9dbSNicholas Bellinger } 745c66ac9dbSNicholas Bellinger after_mode_sense: 746c66ac9dbSNicholas Bellinger 747c66ac9dbSNicholas Bellinger if (sd->type != TYPE_TAPE) 748c66ac9dbSNicholas Bellinger goto after_mode_select; 749c66ac9dbSNicholas Bellinger 750c66ac9dbSNicholas Bellinger /* 751c66ac9dbSNicholas Bellinger * Hack to correctly obtain the initiator requested blocksize for 752c66ac9dbSNicholas Bellinger * TYPE_TAPE. Since this value is dependent upon each tape media, 753c66ac9dbSNicholas Bellinger * struct scsi_device->sector_size will not contain the correct value 754c66ac9dbSNicholas Bellinger * by default, so we go ahead and set it so 755c66ac9dbSNicholas Bellinger * TRANSPORT(dev)->get_blockdev() returns the correct value to the 756c66ac9dbSNicholas Bellinger * storage engine. 757c66ac9dbSNicholas Bellinger */ 758c66ac9dbSNicholas Bellinger if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && 759c66ac9dbSNicholas Bellinger (status_byte(result) << 1) == SAM_STAT_GOOD) { 760c66ac9dbSNicholas Bellinger unsigned char *buf; 761c66ac9dbSNicholas Bellinger struct scatterlist *sg = task->task_sg; 762c66ac9dbSNicholas Bellinger u16 bdl; 763c66ac9dbSNicholas Bellinger u32 blocksize; 764c66ac9dbSNicholas Bellinger 765c66ac9dbSNicholas Bellinger buf = sg_virt(&sg[0]); 766c66ac9dbSNicholas Bellinger if (!(buf)) { 767c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to get buf for scatterlist\n"); 768c66ac9dbSNicholas Bellinger goto after_mode_select; 769c66ac9dbSNicholas Bellinger } 770c66ac9dbSNicholas Bellinger 771c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 772c66ac9dbSNicholas Bellinger bdl = (buf[3]); 773c66ac9dbSNicholas Bellinger else 774c66ac9dbSNicholas Bellinger bdl = (buf[6] << 8) | (buf[7]); 775c66ac9dbSNicholas Bellinger 776c66ac9dbSNicholas Bellinger if (!bdl) 777c66ac9dbSNicholas Bellinger goto after_mode_select; 778c66ac9dbSNicholas Bellinger 779c66ac9dbSNicholas Bellinger if (cdb[0] == MODE_SELECT) 780c66ac9dbSNicholas Bellinger blocksize = (buf[9] << 16) | (buf[10] << 8) | 781c66ac9dbSNicholas Bellinger (buf[11]); 782c66ac9dbSNicholas Bellinger else 783c66ac9dbSNicholas Bellinger blocksize = (buf[13] << 16) | (buf[14] << 8) | 784c66ac9dbSNicholas Bellinger (buf[15]); 785c66ac9dbSNicholas Bellinger 786c66ac9dbSNicholas Bellinger sd->sector_size = blocksize; 787c66ac9dbSNicholas Bellinger } 788c66ac9dbSNicholas Bellinger after_mode_select: 789c66ac9dbSNicholas Bellinger 790c66ac9dbSNicholas Bellinger if (status_byte(result) & CHECK_CONDITION) 791c66ac9dbSNicholas Bellinger return 1; 792c66ac9dbSNicholas Bellinger 793c66ac9dbSNicholas Bellinger return 0; 794c66ac9dbSNicholas Bellinger } 795c66ac9dbSNicholas Bellinger 796c66ac9dbSNicholas Bellinger static struct se_task * 797c66ac9dbSNicholas Bellinger pscsi_alloc_task(struct se_cmd *cmd) 798c66ac9dbSNicholas Bellinger { 799c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt; 800c66ac9dbSNicholas Bellinger unsigned char *cdb = T_TASK(cmd)->t_task_cdb; 801c66ac9dbSNicholas Bellinger 802c66ac9dbSNicholas Bellinger pt = kzalloc(sizeof(struct pscsi_plugin_task), GFP_KERNEL); 803c66ac9dbSNicholas Bellinger if (!pt) { 804c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate struct pscsi_plugin_task\n"); 805c66ac9dbSNicholas Bellinger return NULL; 806c66ac9dbSNicholas Bellinger } 807c66ac9dbSNicholas Bellinger 808c66ac9dbSNicholas Bellinger /* 809c66ac9dbSNicholas Bellinger * If TCM Core is signaling a > TCM_MAX_COMMAND_SIZE allocation, 810c66ac9dbSNicholas Bellinger * allocate the extended CDB buffer for per struct se_task context 811c66ac9dbSNicholas Bellinger * pt->pscsi_cdb now. 812c66ac9dbSNicholas Bellinger */ 813c66ac9dbSNicholas Bellinger if (T_TASK(cmd)->t_task_cdb != T_TASK(cmd)->__t_task_cdb) { 814c66ac9dbSNicholas Bellinger 815c66ac9dbSNicholas Bellinger pt->pscsi_cdb = kzalloc(scsi_command_size(cdb), GFP_KERNEL); 816c66ac9dbSNicholas Bellinger if (!(pt->pscsi_cdb)) { 817c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: Unable to allocate extended" 818c66ac9dbSNicholas Bellinger " pt->pscsi_cdb\n"); 8198fc1858aSRoland Dreier kfree(pt); 820c66ac9dbSNicholas Bellinger return NULL; 821c66ac9dbSNicholas Bellinger } 822c66ac9dbSNicholas Bellinger } else 823c66ac9dbSNicholas Bellinger pt->pscsi_cdb = &pt->__pscsi_cdb[0]; 824c66ac9dbSNicholas Bellinger 825c66ac9dbSNicholas Bellinger return &pt->pscsi_task; 826c66ac9dbSNicholas Bellinger } 827c66ac9dbSNicholas Bellinger 828c66ac9dbSNicholas Bellinger static inline void pscsi_blk_init_request( 829c66ac9dbSNicholas Bellinger struct se_task *task, 830c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt, 831c66ac9dbSNicholas Bellinger struct request *req, 832c66ac9dbSNicholas Bellinger int bidi_read) 833c66ac9dbSNicholas Bellinger { 834c66ac9dbSNicholas Bellinger /* 835c66ac9dbSNicholas Bellinger * Defined as "scsi command" in include/linux/blkdev.h. 836c66ac9dbSNicholas Bellinger */ 837c66ac9dbSNicholas Bellinger req->cmd_type = REQ_TYPE_BLOCK_PC; 838c66ac9dbSNicholas Bellinger /* 839c66ac9dbSNicholas Bellinger * For the extra BIDI-COMMAND READ struct request we do not 840c66ac9dbSNicholas Bellinger * need to setup the remaining structure members 841c66ac9dbSNicholas Bellinger */ 842c66ac9dbSNicholas Bellinger if (bidi_read) 843c66ac9dbSNicholas Bellinger return; 844c66ac9dbSNicholas Bellinger /* 845c66ac9dbSNicholas Bellinger * Setup the done function pointer for struct request, 846c66ac9dbSNicholas Bellinger * also set the end_io_data pointer.to struct se_task. 847c66ac9dbSNicholas Bellinger */ 848c66ac9dbSNicholas Bellinger req->end_io = pscsi_req_done; 849c66ac9dbSNicholas Bellinger req->end_io_data = (void *)task; 850c66ac9dbSNicholas Bellinger /* 851c66ac9dbSNicholas Bellinger * Load the referenced struct se_task's SCSI CDB into 852c66ac9dbSNicholas Bellinger * include/linux/blkdev.h:struct request->cmd 853c66ac9dbSNicholas Bellinger */ 854c66ac9dbSNicholas Bellinger req->cmd_len = scsi_command_size(pt->pscsi_cdb); 855c66ac9dbSNicholas Bellinger req->cmd = &pt->pscsi_cdb[0]; 856c66ac9dbSNicholas Bellinger /* 857c66ac9dbSNicholas Bellinger * Setup pointer for outgoing sense data. 858c66ac9dbSNicholas Bellinger */ 859c66ac9dbSNicholas Bellinger req->sense = (void *)&pt->pscsi_sense[0]; 860c66ac9dbSNicholas Bellinger req->sense_len = 0; 861c66ac9dbSNicholas Bellinger } 862c66ac9dbSNicholas Bellinger 863c66ac9dbSNicholas Bellinger /* 864c66ac9dbSNicholas Bellinger * Used for pSCSI data payloads for all *NON* SCF_SCSI_DATA_SG_IO_CDB 865c66ac9dbSNicholas Bellinger */ 866c66ac9dbSNicholas Bellinger static int pscsi_blk_get_request(struct se_task *task) 867c66ac9dbSNicholas Bellinger { 868c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 869c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; 870c66ac9dbSNicholas Bellinger 871c66ac9dbSNicholas Bellinger pt->pscsi_req = blk_get_request(pdv->pdv_sd->request_queue, 872c66ac9dbSNicholas Bellinger (task->task_data_direction == DMA_TO_DEVICE), 873c66ac9dbSNicholas Bellinger GFP_KERNEL); 874c66ac9dbSNicholas Bellinger if (!(pt->pscsi_req) || IS_ERR(pt->pscsi_req)) { 875c66ac9dbSNicholas Bellinger printk(KERN_ERR "PSCSI: blk_get_request() failed: %ld\n", 876c66ac9dbSNicholas Bellinger IS_ERR(pt->pscsi_req)); 877c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 878c66ac9dbSNicholas Bellinger } 879c66ac9dbSNicholas Bellinger /* 880c66ac9dbSNicholas Bellinger * Setup the newly allocated struct request for REQ_TYPE_BLOCK_PC, 881c66ac9dbSNicholas Bellinger * and setup rq callback, CDB and sense. 882c66ac9dbSNicholas Bellinger */ 883c66ac9dbSNicholas Bellinger pscsi_blk_init_request(task, pt, pt->pscsi_req, 0); 884c66ac9dbSNicholas Bellinger return 0; 885c66ac9dbSNicholas Bellinger } 886c66ac9dbSNicholas Bellinger 887c66ac9dbSNicholas Bellinger /* pscsi_do_task(): (Part of se_subsystem_api_t template) 888c66ac9dbSNicholas Bellinger * 889c66ac9dbSNicholas Bellinger * 890c66ac9dbSNicholas Bellinger */ 891c66ac9dbSNicholas Bellinger static int pscsi_do_task(struct se_task *task) 892c66ac9dbSNicholas Bellinger { 893c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 894c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; 895c66ac9dbSNicholas Bellinger /* 896c66ac9dbSNicholas Bellinger * Set the struct request->timeout value based on peripheral 897c66ac9dbSNicholas Bellinger * device type from SCSI. 898c66ac9dbSNicholas Bellinger */ 899c66ac9dbSNicholas Bellinger if (pdv->pdv_sd->type == TYPE_DISK) 900c66ac9dbSNicholas Bellinger pt->pscsi_req->timeout = PS_TIMEOUT_DISK; 901c66ac9dbSNicholas Bellinger else 902c66ac9dbSNicholas Bellinger pt->pscsi_req->timeout = PS_TIMEOUT_OTHER; 903c66ac9dbSNicholas Bellinger 904c66ac9dbSNicholas Bellinger pt->pscsi_req->retries = PS_RETRY; 905c66ac9dbSNicholas Bellinger /* 906c66ac9dbSNicholas Bellinger * Queue the struct request into the struct scsi_device->request_queue. 907c66ac9dbSNicholas Bellinger * Also check for HEAD_OF_QUEUE SAM TASK attr from received se_cmd 908c66ac9dbSNicholas Bellinger * descriptor 909c66ac9dbSNicholas Bellinger */ 910c66ac9dbSNicholas Bellinger blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, pt->pscsi_req, 911c66ac9dbSNicholas Bellinger (task->task_se_cmd->sam_task_attr == TASK_ATTR_HOQ), 912c66ac9dbSNicholas Bellinger pscsi_req_done); 913c66ac9dbSNicholas Bellinger 914c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_SENT_TO_TRANSPORT; 915c66ac9dbSNicholas Bellinger } 916c66ac9dbSNicholas Bellinger 917c66ac9dbSNicholas Bellinger static void pscsi_free_task(struct se_task *task) 918c66ac9dbSNicholas Bellinger { 919c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 920c66ac9dbSNicholas Bellinger struct se_cmd *cmd = task->task_se_cmd; 921c66ac9dbSNicholas Bellinger 922c66ac9dbSNicholas Bellinger /* 923c66ac9dbSNicholas Bellinger * Release the extended CDB allocation from pscsi_alloc_task() 924c66ac9dbSNicholas Bellinger * if one exists. 925c66ac9dbSNicholas Bellinger */ 926c66ac9dbSNicholas Bellinger if (T_TASK(cmd)->t_task_cdb != T_TASK(cmd)->__t_task_cdb) 927c66ac9dbSNicholas Bellinger kfree(pt->pscsi_cdb); 928c66ac9dbSNicholas Bellinger /* 929c66ac9dbSNicholas Bellinger * We do not release the bio(s) here associated with this task, as 930c66ac9dbSNicholas Bellinger * this is handled by bio_put() and pscsi_bi_endio(). 931c66ac9dbSNicholas Bellinger */ 932c66ac9dbSNicholas Bellinger kfree(pt); 933c66ac9dbSNicholas Bellinger } 934c66ac9dbSNicholas Bellinger 935c66ac9dbSNicholas Bellinger enum { 936c66ac9dbSNicholas Bellinger Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, 937c66ac9dbSNicholas Bellinger Opt_scsi_lun_id, Opt_err 938c66ac9dbSNicholas Bellinger }; 939c66ac9dbSNicholas Bellinger 940c66ac9dbSNicholas Bellinger static match_table_t tokens = { 941c66ac9dbSNicholas Bellinger {Opt_scsi_host_id, "scsi_host_id=%d"}, 942c66ac9dbSNicholas Bellinger {Opt_scsi_channel_id, "scsi_channel_id=%d"}, 943c66ac9dbSNicholas Bellinger {Opt_scsi_target_id, "scsi_target_id=%d"}, 944c66ac9dbSNicholas Bellinger {Opt_scsi_lun_id, "scsi_lun_id=%d"}, 945c66ac9dbSNicholas Bellinger {Opt_err, NULL} 946c66ac9dbSNicholas Bellinger }; 947c66ac9dbSNicholas Bellinger 948c66ac9dbSNicholas Bellinger static ssize_t pscsi_set_configfs_dev_params(struct se_hba *hba, 949c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 950c66ac9dbSNicholas Bellinger const char *page, 951c66ac9dbSNicholas Bellinger ssize_t count) 952c66ac9dbSNicholas Bellinger { 953c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; 954c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 955c66ac9dbSNicholas Bellinger char *orig, *ptr, *opts; 956c66ac9dbSNicholas Bellinger substring_t args[MAX_OPT_ARGS]; 957c66ac9dbSNicholas Bellinger int ret = 0, arg, token; 958c66ac9dbSNicholas Bellinger 959c66ac9dbSNicholas Bellinger opts = kstrdup(page, GFP_KERNEL); 960c66ac9dbSNicholas Bellinger if (!opts) 961c66ac9dbSNicholas Bellinger return -ENOMEM; 962c66ac9dbSNicholas Bellinger 963c66ac9dbSNicholas Bellinger orig = opts; 964c66ac9dbSNicholas Bellinger 965c66ac9dbSNicholas Bellinger while ((ptr = strsep(&opts, ",")) != NULL) { 966c66ac9dbSNicholas Bellinger if (!*ptr) 967c66ac9dbSNicholas Bellinger continue; 968c66ac9dbSNicholas Bellinger 969c66ac9dbSNicholas Bellinger token = match_token(ptr, tokens, args); 970c66ac9dbSNicholas Bellinger switch (token) { 971c66ac9dbSNicholas Bellinger case Opt_scsi_host_id: 972c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 973c66ac9dbSNicholas Bellinger printk(KERN_ERR "PSCSI[%d]: Unable to accept" 974c66ac9dbSNicholas Bellinger " scsi_host_id while phv_mode ==" 975c66ac9dbSNicholas Bellinger " PHV_LLD_SCSI_HOST_NO\n", 976c66ac9dbSNicholas Bellinger phv->phv_host_id); 977c66ac9dbSNicholas Bellinger ret = -EINVAL; 978c66ac9dbSNicholas Bellinger goto out; 979c66ac9dbSNicholas Bellinger } 980c66ac9dbSNicholas Bellinger match_int(args, &arg); 981c66ac9dbSNicholas Bellinger pdv->pdv_host_id = arg; 982c66ac9dbSNicholas Bellinger printk(KERN_INFO "PSCSI[%d]: Referencing SCSI Host ID:" 983c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_host_id); 984c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; 985c66ac9dbSNicholas Bellinger break; 986c66ac9dbSNicholas Bellinger case Opt_scsi_channel_id: 987c66ac9dbSNicholas Bellinger match_int(args, &arg); 988c66ac9dbSNicholas Bellinger pdv->pdv_channel_id = arg; 989c66ac9dbSNicholas Bellinger printk(KERN_INFO "PSCSI[%d]: Referencing SCSI Channel" 990c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 991c66ac9dbSNicholas Bellinger pdv->pdv_channel_id); 992c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; 993c66ac9dbSNicholas Bellinger break; 994c66ac9dbSNicholas Bellinger case Opt_scsi_target_id: 995c66ac9dbSNicholas Bellinger match_int(args, &arg); 996c66ac9dbSNicholas Bellinger pdv->pdv_target_id = arg; 997c66ac9dbSNicholas Bellinger printk(KERN_INFO "PSCSI[%d]: Referencing SCSI Target" 998c66ac9dbSNicholas Bellinger " ID: %d\n", phv->phv_host_id, 999c66ac9dbSNicholas Bellinger pdv->pdv_target_id); 1000c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_TARGET_ID; 1001c66ac9dbSNicholas Bellinger break; 1002c66ac9dbSNicholas Bellinger case Opt_scsi_lun_id: 1003c66ac9dbSNicholas Bellinger match_int(args, &arg); 1004c66ac9dbSNicholas Bellinger pdv->pdv_lun_id = arg; 1005c66ac9dbSNicholas Bellinger printk(KERN_INFO "PSCSI[%d]: Referencing SCSI LUN ID:" 1006c66ac9dbSNicholas Bellinger " %d\n", phv->phv_host_id, pdv->pdv_lun_id); 1007c66ac9dbSNicholas Bellinger pdv->pdv_flags |= PDF_HAS_LUN_ID; 1008c66ac9dbSNicholas Bellinger break; 1009c66ac9dbSNicholas Bellinger default: 1010c66ac9dbSNicholas Bellinger break; 1011c66ac9dbSNicholas Bellinger } 1012c66ac9dbSNicholas Bellinger } 1013c66ac9dbSNicholas Bellinger 1014c66ac9dbSNicholas Bellinger out: 1015c66ac9dbSNicholas Bellinger kfree(orig); 1016c66ac9dbSNicholas Bellinger return (!ret) ? count : ret; 1017c66ac9dbSNicholas Bellinger } 1018c66ac9dbSNicholas Bellinger 1019c66ac9dbSNicholas Bellinger static ssize_t pscsi_check_configfs_dev_params( 1020c66ac9dbSNicholas Bellinger struct se_hba *hba, 1021c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev) 1022c66ac9dbSNicholas Bellinger { 1023c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; 1024c66ac9dbSNicholas Bellinger 1025c66ac9dbSNicholas Bellinger if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || 1026c66ac9dbSNicholas Bellinger !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || 1027c66ac9dbSNicholas Bellinger !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { 1028c66ac9dbSNicholas Bellinger printk(KERN_ERR "Missing scsi_channel_id=, scsi_target_id= and" 1029c66ac9dbSNicholas Bellinger " scsi_lun_id= parameters\n"); 1030c66ac9dbSNicholas Bellinger return -1; 1031c66ac9dbSNicholas Bellinger } 1032c66ac9dbSNicholas Bellinger 1033c66ac9dbSNicholas Bellinger return 0; 1034c66ac9dbSNicholas Bellinger } 1035c66ac9dbSNicholas Bellinger 1036c66ac9dbSNicholas Bellinger static ssize_t pscsi_show_configfs_dev_params(struct se_hba *hba, 1037c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 1038c66ac9dbSNicholas Bellinger char *b) 1039c66ac9dbSNicholas Bellinger { 1040c66ac9dbSNicholas Bellinger struct pscsi_hba_virt *phv = hba->hba_ptr; 1041c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; 1042c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 1043c66ac9dbSNicholas Bellinger unsigned char host_id[16]; 1044c66ac9dbSNicholas Bellinger ssize_t bl; 1045c66ac9dbSNicholas Bellinger int i; 1046c66ac9dbSNicholas Bellinger 1047c66ac9dbSNicholas Bellinger if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) 1048c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "%d", pdv->pdv_host_id); 1049c66ac9dbSNicholas Bellinger else 1050c66ac9dbSNicholas Bellinger snprintf(host_id, 16, "PHBA Mode"); 1051c66ac9dbSNicholas Bellinger 1052c66ac9dbSNicholas Bellinger bl = sprintf(b, "SCSI Device Bus Location:" 1053c66ac9dbSNicholas Bellinger " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", 1054c66ac9dbSNicholas Bellinger pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, 1055c66ac9dbSNicholas Bellinger host_id); 1056c66ac9dbSNicholas Bellinger 1057c66ac9dbSNicholas Bellinger if (sd) { 1058c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 1059c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "Vendor: "); 1060c66ac9dbSNicholas Bellinger for (i = 0; i < 8; i++) { 1061c66ac9dbSNicholas Bellinger if (ISPRINT(sd->vendor[i])) /* printable character? */ 1062c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->vendor[i]); 1063c66ac9dbSNicholas Bellinger else 1064c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 1065c66ac9dbSNicholas Bellinger } 1066c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Model: "); 1067c66ac9dbSNicholas Bellinger for (i = 0; i < 16; i++) { 1068c66ac9dbSNicholas Bellinger if (ISPRINT(sd->model[i])) /* printable character ? */ 1069c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->model[i]); 1070c66ac9dbSNicholas Bellinger else 1071c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 1072c66ac9dbSNicholas Bellinger } 1073c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " Rev: "); 1074c66ac9dbSNicholas Bellinger for (i = 0; i < 4; i++) { 1075c66ac9dbSNicholas Bellinger if (ISPRINT(sd->rev[i])) /* printable character ? */ 1076c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "%c", sd->rev[i]); 1077c66ac9dbSNicholas Bellinger else 1078c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 1079c66ac9dbSNicholas Bellinger } 1080c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "\n"); 1081c66ac9dbSNicholas Bellinger } 1082c66ac9dbSNicholas Bellinger return bl; 1083c66ac9dbSNicholas Bellinger } 1084c66ac9dbSNicholas Bellinger 1085c66ac9dbSNicholas Bellinger static void pscsi_bi_endio(struct bio *bio, int error) 1086c66ac9dbSNicholas Bellinger { 1087c66ac9dbSNicholas Bellinger bio_put(bio); 1088c66ac9dbSNicholas Bellinger } 1089c66ac9dbSNicholas Bellinger 1090c66ac9dbSNicholas Bellinger static inline struct bio *pscsi_get_bio(struct pscsi_dev_virt *pdv, int sg_num) 1091c66ac9dbSNicholas Bellinger { 1092c66ac9dbSNicholas Bellinger struct bio *bio; 1093c66ac9dbSNicholas Bellinger /* 1094c66ac9dbSNicholas Bellinger * Use bio_malloc() following the comment in for bio -> struct request 1095c66ac9dbSNicholas Bellinger * in block/blk-core.c:blk_make_request() 1096c66ac9dbSNicholas Bellinger */ 1097c66ac9dbSNicholas Bellinger bio = bio_kmalloc(GFP_KERNEL, sg_num); 1098c66ac9dbSNicholas Bellinger if (!(bio)) { 1099c66ac9dbSNicholas Bellinger printk(KERN_ERR "PSCSI: bio_kmalloc() failed\n"); 1100c66ac9dbSNicholas Bellinger return NULL; 1101c66ac9dbSNicholas Bellinger } 1102c66ac9dbSNicholas Bellinger bio->bi_end_io = pscsi_bi_endio; 1103c66ac9dbSNicholas Bellinger 1104c66ac9dbSNicholas Bellinger return bio; 1105c66ac9dbSNicholas Bellinger } 1106c66ac9dbSNicholas Bellinger 1107c66ac9dbSNicholas Bellinger #if 0 1108c66ac9dbSNicholas Bellinger #define DEBUG_PSCSI(x...) printk(x) 1109c66ac9dbSNicholas Bellinger #else 1110c66ac9dbSNicholas Bellinger #define DEBUG_PSCSI(x...) 1111c66ac9dbSNicholas Bellinger #endif 1112c66ac9dbSNicholas Bellinger 1113c66ac9dbSNicholas Bellinger static int __pscsi_map_task_SG( 1114c66ac9dbSNicholas Bellinger struct se_task *task, 1115c66ac9dbSNicholas Bellinger struct scatterlist *task_sg, 1116c66ac9dbSNicholas Bellinger u32 task_sg_num, 1117c66ac9dbSNicholas Bellinger int bidi_read) 1118c66ac9dbSNicholas Bellinger { 1119c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 1120c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; 1121c66ac9dbSNicholas Bellinger struct bio *bio = NULL, *hbio = NULL, *tbio = NULL; 1122c66ac9dbSNicholas Bellinger struct page *page; 1123c66ac9dbSNicholas Bellinger struct scatterlist *sg; 1124c66ac9dbSNicholas Bellinger u32 data_len = task->task_size, i, len, bytes, off; 1125c66ac9dbSNicholas Bellinger int nr_pages = (task->task_size + task_sg[0].offset + 1126c66ac9dbSNicholas Bellinger PAGE_SIZE - 1) >> PAGE_SHIFT; 1127c66ac9dbSNicholas Bellinger int nr_vecs = 0, rc, ret = PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES; 1128c66ac9dbSNicholas Bellinger int rw = (task->task_data_direction == DMA_TO_DEVICE); 1129c66ac9dbSNicholas Bellinger 1130c66ac9dbSNicholas Bellinger if (!task->task_size) 1131c66ac9dbSNicholas Bellinger return 0; 1132c66ac9dbSNicholas Bellinger /* 1133c66ac9dbSNicholas Bellinger * For SCF_SCSI_DATA_SG_IO_CDB, Use fs/bio.c:bio_add_page() to setup 1134c66ac9dbSNicholas Bellinger * the bio_vec maplist from TC< struct se_mem -> task->task_sg -> 1135c66ac9dbSNicholas Bellinger * struct scatterlist memory. The struct se_task->task_sg[] currently needs 1136c66ac9dbSNicholas Bellinger * to be attached to struct bios for submission to Linux/SCSI using 1137c66ac9dbSNicholas Bellinger * struct request to struct scsi_device->request_queue. 1138c66ac9dbSNicholas Bellinger * 1139c66ac9dbSNicholas Bellinger * Note that this will be changing post v2.6.28 as Target_Core_Mod/pSCSI 1140c66ac9dbSNicholas Bellinger * is ported to upstream SCSI passthrough functionality that accepts 1141c66ac9dbSNicholas Bellinger * struct scatterlist->page_link or struct page as a paraemeter. 1142c66ac9dbSNicholas Bellinger */ 1143c66ac9dbSNicholas Bellinger DEBUG_PSCSI("PSCSI: nr_pages: %d\n", nr_pages); 1144c66ac9dbSNicholas Bellinger 1145c66ac9dbSNicholas Bellinger for_each_sg(task_sg, sg, task_sg_num, i) { 1146c66ac9dbSNicholas Bellinger page = sg_page(sg); 1147c66ac9dbSNicholas Bellinger off = sg->offset; 1148c66ac9dbSNicholas Bellinger len = sg->length; 1149c66ac9dbSNicholas Bellinger 1150c66ac9dbSNicholas Bellinger DEBUG_PSCSI("PSCSI: i: %d page: %p len: %d off: %d\n", i, 1151c66ac9dbSNicholas Bellinger page, len, off); 1152c66ac9dbSNicholas Bellinger 1153c66ac9dbSNicholas Bellinger while (len > 0 && data_len > 0) { 1154c66ac9dbSNicholas Bellinger bytes = min_t(unsigned int, len, PAGE_SIZE - off); 1155c66ac9dbSNicholas Bellinger bytes = min(bytes, data_len); 1156c66ac9dbSNicholas Bellinger 1157c66ac9dbSNicholas Bellinger if (!(bio)) { 1158c66ac9dbSNicholas Bellinger nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); 1159c66ac9dbSNicholas Bellinger nr_pages -= nr_vecs; 1160c66ac9dbSNicholas Bellinger /* 1161c66ac9dbSNicholas Bellinger * Calls bio_kmalloc() and sets bio->bi_end_io() 1162c66ac9dbSNicholas Bellinger */ 1163c66ac9dbSNicholas Bellinger bio = pscsi_get_bio(pdv, nr_vecs); 1164c66ac9dbSNicholas Bellinger if (!(bio)) 1165c66ac9dbSNicholas Bellinger goto fail; 1166c66ac9dbSNicholas Bellinger 1167c66ac9dbSNicholas Bellinger if (rw) 1168c66ac9dbSNicholas Bellinger bio->bi_rw |= REQ_WRITE; 1169c66ac9dbSNicholas Bellinger 1170c66ac9dbSNicholas Bellinger DEBUG_PSCSI("PSCSI: Allocated bio: %p," 1171c66ac9dbSNicholas Bellinger " dir: %s nr_vecs: %d\n", bio, 1172c66ac9dbSNicholas Bellinger (rw) ? "rw" : "r", nr_vecs); 1173c66ac9dbSNicholas Bellinger /* 1174c66ac9dbSNicholas Bellinger * Set *hbio pointer to handle the case: 1175c66ac9dbSNicholas Bellinger * nr_pages > BIO_MAX_PAGES, where additional 1176c66ac9dbSNicholas Bellinger * bios need to be added to complete a given 1177c66ac9dbSNicholas Bellinger * struct se_task 1178c66ac9dbSNicholas Bellinger */ 1179c66ac9dbSNicholas Bellinger if (!hbio) 1180c66ac9dbSNicholas Bellinger hbio = tbio = bio; 1181c66ac9dbSNicholas Bellinger else 1182c66ac9dbSNicholas Bellinger tbio = tbio->bi_next = bio; 1183c66ac9dbSNicholas Bellinger } 1184c66ac9dbSNicholas Bellinger 1185c66ac9dbSNicholas Bellinger DEBUG_PSCSI("PSCSI: Calling bio_add_pc_page() i: %d" 1186c66ac9dbSNicholas Bellinger " bio: %p page: %p len: %d off: %d\n", i, bio, 1187c66ac9dbSNicholas Bellinger page, len, off); 1188c66ac9dbSNicholas Bellinger 1189c66ac9dbSNicholas Bellinger rc = bio_add_pc_page(pdv->pdv_sd->request_queue, 1190c66ac9dbSNicholas Bellinger bio, page, bytes, off); 1191c66ac9dbSNicholas Bellinger if (rc != bytes) 1192c66ac9dbSNicholas Bellinger goto fail; 1193c66ac9dbSNicholas Bellinger 1194c66ac9dbSNicholas Bellinger DEBUG_PSCSI("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", 1195c66ac9dbSNicholas Bellinger bio->bi_vcnt, nr_vecs); 1196c66ac9dbSNicholas Bellinger 1197c66ac9dbSNicholas Bellinger if (bio->bi_vcnt > nr_vecs) { 1198c66ac9dbSNicholas Bellinger DEBUG_PSCSI("PSCSI: Reached bio->bi_vcnt max:" 1199c66ac9dbSNicholas Bellinger " %d i: %d bio: %p, allocating another" 1200c66ac9dbSNicholas Bellinger " bio\n", bio->bi_vcnt, i, bio); 1201c66ac9dbSNicholas Bellinger /* 1202c66ac9dbSNicholas Bellinger * Clear the pointer so that another bio will 1203c66ac9dbSNicholas Bellinger * be allocated with pscsi_get_bio() above, the 1204c66ac9dbSNicholas Bellinger * current bio has already been set *tbio and 1205c66ac9dbSNicholas Bellinger * bio->bi_next. 1206c66ac9dbSNicholas Bellinger */ 1207c66ac9dbSNicholas Bellinger bio = NULL; 1208c66ac9dbSNicholas Bellinger } 1209c66ac9dbSNicholas Bellinger 1210c66ac9dbSNicholas Bellinger page++; 1211c66ac9dbSNicholas Bellinger len -= bytes; 1212c66ac9dbSNicholas Bellinger data_len -= bytes; 1213c66ac9dbSNicholas Bellinger off = 0; 1214c66ac9dbSNicholas Bellinger } 1215c66ac9dbSNicholas Bellinger } 1216c66ac9dbSNicholas Bellinger /* 1217c66ac9dbSNicholas Bellinger * Setup the primary pt->pscsi_req used for non BIDI and BIDI-COMMAND 1218c66ac9dbSNicholas Bellinger * primary SCSI WRITE poayload mapped for struct se_task->task_sg[] 1219c66ac9dbSNicholas Bellinger */ 1220c66ac9dbSNicholas Bellinger if (!(bidi_read)) { 1221c66ac9dbSNicholas Bellinger /* 1222c66ac9dbSNicholas Bellinger * Starting with v2.6.31, call blk_make_request() passing in *hbio to 1223c66ac9dbSNicholas Bellinger * allocate the pSCSI task a struct request. 1224c66ac9dbSNicholas Bellinger */ 1225c66ac9dbSNicholas Bellinger pt->pscsi_req = blk_make_request(pdv->pdv_sd->request_queue, 1226c66ac9dbSNicholas Bellinger hbio, GFP_KERNEL); 1227c66ac9dbSNicholas Bellinger if (!(pt->pscsi_req)) { 1228c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: blk_make_request() failed\n"); 1229c66ac9dbSNicholas Bellinger goto fail; 1230c66ac9dbSNicholas Bellinger } 1231c66ac9dbSNicholas Bellinger /* 1232c66ac9dbSNicholas Bellinger * Setup the newly allocated struct request for REQ_TYPE_BLOCK_PC, 1233c66ac9dbSNicholas Bellinger * and setup rq callback, CDB and sense. 1234c66ac9dbSNicholas Bellinger */ 1235c66ac9dbSNicholas Bellinger pscsi_blk_init_request(task, pt, pt->pscsi_req, 0); 1236c66ac9dbSNicholas Bellinger 1237c66ac9dbSNicholas Bellinger return task->task_sg_num; 1238c66ac9dbSNicholas Bellinger } 1239c66ac9dbSNicholas Bellinger /* 1240c66ac9dbSNicholas Bellinger * Setup the secondary pt->pscsi_req->next_rq used for the extra BIDI-COMMAND 1241c66ac9dbSNicholas Bellinger * SCSI READ paylaod mapped for struct se_task->task_sg_bidi[] 1242c66ac9dbSNicholas Bellinger */ 1243c66ac9dbSNicholas Bellinger pt->pscsi_req->next_rq = blk_make_request(pdv->pdv_sd->request_queue, 1244c66ac9dbSNicholas Bellinger hbio, GFP_KERNEL); 1245c66ac9dbSNicholas Bellinger if (!(pt->pscsi_req->next_rq)) { 1246c66ac9dbSNicholas Bellinger printk(KERN_ERR "pSCSI: blk_make_request() failed for BIDI\n"); 1247c66ac9dbSNicholas Bellinger goto fail; 1248c66ac9dbSNicholas Bellinger } 1249c66ac9dbSNicholas Bellinger pscsi_blk_init_request(task, pt, pt->pscsi_req->next_rq, 1); 1250c66ac9dbSNicholas Bellinger 1251c66ac9dbSNicholas Bellinger return task->task_sg_num; 1252c66ac9dbSNicholas Bellinger fail: 1253c66ac9dbSNicholas Bellinger while (hbio) { 1254c66ac9dbSNicholas Bellinger bio = hbio; 1255c66ac9dbSNicholas Bellinger hbio = hbio->bi_next; 1256c66ac9dbSNicholas Bellinger bio->bi_next = NULL; 1257c66ac9dbSNicholas Bellinger bio_endio(bio, 0); 1258c66ac9dbSNicholas Bellinger } 1259c66ac9dbSNicholas Bellinger return ret; 1260c66ac9dbSNicholas Bellinger } 1261c66ac9dbSNicholas Bellinger 1262c66ac9dbSNicholas Bellinger static int pscsi_map_task_SG(struct se_task *task) 1263c66ac9dbSNicholas Bellinger { 1264c66ac9dbSNicholas Bellinger int ret; 1265c66ac9dbSNicholas Bellinger 1266c66ac9dbSNicholas Bellinger /* 1267c66ac9dbSNicholas Bellinger * Setup the main struct request for the task->task_sg[] payload 1268c66ac9dbSNicholas Bellinger */ 1269c66ac9dbSNicholas Bellinger 1270c66ac9dbSNicholas Bellinger ret = __pscsi_map_task_SG(task, task->task_sg, task->task_sg_num, 0); 1271c66ac9dbSNicholas Bellinger if (ret >= 0 && task->task_sg_bidi) { 1272c66ac9dbSNicholas Bellinger /* 1273c66ac9dbSNicholas Bellinger * If present, set up the extra BIDI-COMMAND SCSI READ 1274c66ac9dbSNicholas Bellinger * struct request and payload. 1275c66ac9dbSNicholas Bellinger */ 1276c66ac9dbSNicholas Bellinger ret = __pscsi_map_task_SG(task, task->task_sg_bidi, 1277c66ac9dbSNicholas Bellinger task->task_sg_num, 1); 1278c66ac9dbSNicholas Bellinger } 1279c66ac9dbSNicholas Bellinger 1280c66ac9dbSNicholas Bellinger if (ret < 0) 1281c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 1282c66ac9dbSNicholas Bellinger return 0; 1283c66ac9dbSNicholas Bellinger } 1284c66ac9dbSNicholas Bellinger 1285c66ac9dbSNicholas Bellinger /* pscsi_map_task_non_SG(): 1286c66ac9dbSNicholas Bellinger * 1287c66ac9dbSNicholas Bellinger * 1288c66ac9dbSNicholas Bellinger */ 1289c66ac9dbSNicholas Bellinger static int pscsi_map_task_non_SG(struct se_task *task) 1290c66ac9dbSNicholas Bellinger { 1291c66ac9dbSNicholas Bellinger struct se_cmd *cmd = TASK_CMD(task); 1292c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 1293c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; 1294c66ac9dbSNicholas Bellinger int ret = 0; 1295c66ac9dbSNicholas Bellinger 1296c66ac9dbSNicholas Bellinger if (pscsi_blk_get_request(task) < 0) 1297c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 1298c66ac9dbSNicholas Bellinger 1299c66ac9dbSNicholas Bellinger if (!task->task_size) 1300c66ac9dbSNicholas Bellinger return 0; 1301c66ac9dbSNicholas Bellinger 1302c66ac9dbSNicholas Bellinger ret = blk_rq_map_kern(pdv->pdv_sd->request_queue, 1303c66ac9dbSNicholas Bellinger pt->pscsi_req, T_TASK(cmd)->t_task_buf, 1304c66ac9dbSNicholas Bellinger task->task_size, GFP_KERNEL); 1305c66ac9dbSNicholas Bellinger if (ret < 0) { 1306c66ac9dbSNicholas Bellinger printk(KERN_ERR "PSCSI: blk_rq_map_kern() failed: %d\n", ret); 1307c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 1308c66ac9dbSNicholas Bellinger } 1309c66ac9dbSNicholas Bellinger return 0; 1310c66ac9dbSNicholas Bellinger } 1311c66ac9dbSNicholas Bellinger 1312c66ac9dbSNicholas Bellinger static int pscsi_CDB_none(struct se_task *task) 1313c66ac9dbSNicholas Bellinger { 1314c66ac9dbSNicholas Bellinger return pscsi_blk_get_request(task); 1315c66ac9dbSNicholas Bellinger } 1316c66ac9dbSNicholas Bellinger 1317c66ac9dbSNicholas Bellinger /* pscsi_get_cdb(): 1318c66ac9dbSNicholas Bellinger * 1319c66ac9dbSNicholas Bellinger * 1320c66ac9dbSNicholas Bellinger */ 1321c66ac9dbSNicholas Bellinger static unsigned char *pscsi_get_cdb(struct se_task *task) 1322c66ac9dbSNicholas Bellinger { 1323c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 1324c66ac9dbSNicholas Bellinger 1325c66ac9dbSNicholas Bellinger return pt->pscsi_cdb; 1326c66ac9dbSNicholas Bellinger } 1327c66ac9dbSNicholas Bellinger 1328c66ac9dbSNicholas Bellinger /* pscsi_get_sense_buffer(): 1329c66ac9dbSNicholas Bellinger * 1330c66ac9dbSNicholas Bellinger * 1331c66ac9dbSNicholas Bellinger */ 1332c66ac9dbSNicholas Bellinger static unsigned char *pscsi_get_sense_buffer(struct se_task *task) 1333c66ac9dbSNicholas Bellinger { 1334c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 1335c66ac9dbSNicholas Bellinger 1336c66ac9dbSNicholas Bellinger return (unsigned char *)&pt->pscsi_sense[0]; 1337c66ac9dbSNicholas Bellinger } 1338c66ac9dbSNicholas Bellinger 1339c66ac9dbSNicholas Bellinger /* pscsi_get_device_rev(): 1340c66ac9dbSNicholas Bellinger * 1341c66ac9dbSNicholas Bellinger * 1342c66ac9dbSNicholas Bellinger */ 1343c66ac9dbSNicholas Bellinger static u32 pscsi_get_device_rev(struct se_device *dev) 1344c66ac9dbSNicholas Bellinger { 1345c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = dev->dev_ptr; 1346c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 1347c66ac9dbSNicholas Bellinger 1348c66ac9dbSNicholas Bellinger return (sd->scsi_level - 1) ? sd->scsi_level - 1 : 1; 1349c66ac9dbSNicholas Bellinger } 1350c66ac9dbSNicholas Bellinger 1351c66ac9dbSNicholas Bellinger /* pscsi_get_device_type(): 1352c66ac9dbSNicholas Bellinger * 1353c66ac9dbSNicholas Bellinger * 1354c66ac9dbSNicholas Bellinger */ 1355c66ac9dbSNicholas Bellinger static u32 pscsi_get_device_type(struct se_device *dev) 1356c66ac9dbSNicholas Bellinger { 1357c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = dev->dev_ptr; 1358c66ac9dbSNicholas Bellinger struct scsi_device *sd = pdv->pdv_sd; 1359c66ac9dbSNicholas Bellinger 1360c66ac9dbSNicholas Bellinger return sd->type; 1361c66ac9dbSNicholas Bellinger } 1362c66ac9dbSNicholas Bellinger 1363c66ac9dbSNicholas Bellinger static sector_t pscsi_get_blocks(struct se_device *dev) 1364c66ac9dbSNicholas Bellinger { 1365c66ac9dbSNicholas Bellinger struct pscsi_dev_virt *pdv = dev->dev_ptr; 1366c66ac9dbSNicholas Bellinger 1367c66ac9dbSNicholas Bellinger if (pdv->pdv_bd && pdv->pdv_bd->bd_part) 1368c66ac9dbSNicholas Bellinger return pdv->pdv_bd->bd_part->nr_sects; 1369c66ac9dbSNicholas Bellinger 1370c66ac9dbSNicholas Bellinger dump_stack(); 1371c66ac9dbSNicholas Bellinger return 0; 1372c66ac9dbSNicholas Bellinger } 1373c66ac9dbSNicholas Bellinger 1374c66ac9dbSNicholas Bellinger /* pscsi_handle_SAM_STATUS_failures(): 1375c66ac9dbSNicholas Bellinger * 1376c66ac9dbSNicholas Bellinger * 1377c66ac9dbSNicholas Bellinger */ 1378c66ac9dbSNicholas Bellinger static inline void pscsi_process_SAM_status( 1379c66ac9dbSNicholas Bellinger struct se_task *task, 1380c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt) 1381c66ac9dbSNicholas Bellinger { 1382c66ac9dbSNicholas Bellinger task->task_scsi_status = status_byte(pt->pscsi_result); 1383c66ac9dbSNicholas Bellinger if ((task->task_scsi_status)) { 1384c66ac9dbSNicholas Bellinger task->task_scsi_status <<= 1; 1385c66ac9dbSNicholas Bellinger printk(KERN_INFO "PSCSI Status Byte exception at task: %p CDB:" 1386c66ac9dbSNicholas Bellinger " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0], 1387c66ac9dbSNicholas Bellinger pt->pscsi_result); 1388c66ac9dbSNicholas Bellinger } 1389c66ac9dbSNicholas Bellinger 1390c66ac9dbSNicholas Bellinger switch (host_byte(pt->pscsi_result)) { 1391c66ac9dbSNicholas Bellinger case DID_OK: 1392c66ac9dbSNicholas Bellinger transport_complete_task(task, (!task->task_scsi_status)); 1393c66ac9dbSNicholas Bellinger break; 1394c66ac9dbSNicholas Bellinger default: 1395c66ac9dbSNicholas Bellinger printk(KERN_INFO "PSCSI Host Byte exception at task: %p CDB:" 1396c66ac9dbSNicholas Bellinger " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0], 1397c66ac9dbSNicholas Bellinger pt->pscsi_result); 1398c66ac9dbSNicholas Bellinger task->task_scsi_status = SAM_STAT_CHECK_CONDITION; 1399c66ac9dbSNicholas Bellinger task->task_error_status = PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1400c66ac9dbSNicholas Bellinger TASK_CMD(task)->transport_error_status = 1401c66ac9dbSNicholas Bellinger PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1402c66ac9dbSNicholas Bellinger transport_complete_task(task, 0); 1403c66ac9dbSNicholas Bellinger break; 1404c66ac9dbSNicholas Bellinger } 1405c66ac9dbSNicholas Bellinger 1406c66ac9dbSNicholas Bellinger return; 1407c66ac9dbSNicholas Bellinger } 1408c66ac9dbSNicholas Bellinger 1409c66ac9dbSNicholas Bellinger static void pscsi_req_done(struct request *req, int uptodate) 1410c66ac9dbSNicholas Bellinger { 1411c66ac9dbSNicholas Bellinger struct se_task *task = req->end_io_data; 1412c66ac9dbSNicholas Bellinger struct pscsi_plugin_task *pt = PSCSI_TASK(task); 1413c66ac9dbSNicholas Bellinger 1414c66ac9dbSNicholas Bellinger pt->pscsi_result = req->errors; 1415c66ac9dbSNicholas Bellinger pt->pscsi_resid = req->resid_len; 1416c66ac9dbSNicholas Bellinger 1417c66ac9dbSNicholas Bellinger pscsi_process_SAM_status(task, pt); 1418c66ac9dbSNicholas Bellinger /* 1419c66ac9dbSNicholas Bellinger * Release BIDI-READ if present 1420c66ac9dbSNicholas Bellinger */ 1421c66ac9dbSNicholas Bellinger if (req->next_rq != NULL) 1422c66ac9dbSNicholas Bellinger __blk_put_request(req->q, req->next_rq); 1423c66ac9dbSNicholas Bellinger 1424c66ac9dbSNicholas Bellinger __blk_put_request(req->q, req); 1425c66ac9dbSNicholas Bellinger pt->pscsi_req = NULL; 1426c66ac9dbSNicholas Bellinger } 1427c66ac9dbSNicholas Bellinger 1428c66ac9dbSNicholas Bellinger static struct se_subsystem_api pscsi_template = { 1429c66ac9dbSNicholas Bellinger .name = "pscsi", 1430c66ac9dbSNicholas Bellinger .owner = THIS_MODULE, 1431c66ac9dbSNicholas Bellinger .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV, 1432c66ac9dbSNicholas Bellinger .cdb_none = pscsi_CDB_none, 1433c66ac9dbSNicholas Bellinger .map_task_non_SG = pscsi_map_task_non_SG, 1434c66ac9dbSNicholas Bellinger .map_task_SG = pscsi_map_task_SG, 1435c66ac9dbSNicholas Bellinger .attach_hba = pscsi_attach_hba, 1436c66ac9dbSNicholas Bellinger .detach_hba = pscsi_detach_hba, 1437c66ac9dbSNicholas Bellinger .pmode_enable_hba = pscsi_pmode_enable_hba, 1438c66ac9dbSNicholas Bellinger .allocate_virtdevice = pscsi_allocate_virtdevice, 1439c66ac9dbSNicholas Bellinger .create_virtdevice = pscsi_create_virtdevice, 1440c66ac9dbSNicholas Bellinger .free_device = pscsi_free_device, 1441c66ac9dbSNicholas Bellinger .transport_complete = pscsi_transport_complete, 1442c66ac9dbSNicholas Bellinger .alloc_task = pscsi_alloc_task, 1443c66ac9dbSNicholas Bellinger .do_task = pscsi_do_task, 1444c66ac9dbSNicholas Bellinger .free_task = pscsi_free_task, 1445c66ac9dbSNicholas Bellinger .check_configfs_dev_params = pscsi_check_configfs_dev_params, 1446c66ac9dbSNicholas Bellinger .set_configfs_dev_params = pscsi_set_configfs_dev_params, 1447c66ac9dbSNicholas Bellinger .show_configfs_dev_params = pscsi_show_configfs_dev_params, 1448c66ac9dbSNicholas Bellinger .get_cdb = pscsi_get_cdb, 1449c66ac9dbSNicholas Bellinger .get_sense_buffer = pscsi_get_sense_buffer, 1450c66ac9dbSNicholas Bellinger .get_device_rev = pscsi_get_device_rev, 1451c66ac9dbSNicholas Bellinger .get_device_type = pscsi_get_device_type, 1452c66ac9dbSNicholas Bellinger .get_blocks = pscsi_get_blocks, 1453c66ac9dbSNicholas Bellinger }; 1454c66ac9dbSNicholas Bellinger 1455c66ac9dbSNicholas Bellinger static int __init pscsi_module_init(void) 1456c66ac9dbSNicholas Bellinger { 1457c66ac9dbSNicholas Bellinger return transport_subsystem_register(&pscsi_template); 1458c66ac9dbSNicholas Bellinger } 1459c66ac9dbSNicholas Bellinger 1460c66ac9dbSNicholas Bellinger static void pscsi_module_exit(void) 1461c66ac9dbSNicholas Bellinger { 1462c66ac9dbSNicholas Bellinger transport_subsystem_release(&pscsi_template); 1463c66ac9dbSNicholas Bellinger } 1464c66ac9dbSNicholas Bellinger 1465c66ac9dbSNicholas Bellinger MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); 1466c66ac9dbSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 1467c66ac9dbSNicholas Bellinger MODULE_LICENSE("GPL"); 1468c66ac9dbSNicholas Bellinger 1469c66ac9dbSNicholas Bellinger module_init(pscsi_module_init); 1470c66ac9dbSNicholas Bellinger module_exit(pscsi_module_exit); 1471