Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * Filename: target_core_pscsi.c |
| 3 | * |
| 4 | * This file contains the generic target mode <-> Linux SCSI subsystem plugin. |
| 5 | * |
| 6 | * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. |
| 7 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. |
| 8 | * Copyright (c) 2007-2010 Rising Tide Systems |
| 9 | * Copyright (c) 2008-2010 Linux-iSCSI.org |
| 10 | * |
| 11 | * Nicholas A. Bellinger <nab@kernel.org> |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License as published by |
| 15 | * the Free Software Foundation; either version 2 of the License, or |
| 16 | * (at your option) any later version. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with this program; if not, write to the Free Software |
| 25 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 26 | * |
| 27 | ******************************************************************************/ |
| 28 | |
| 29 | #include <linux/version.h> |
| 30 | #include <linux/string.h> |
| 31 | #include <linux/parser.h> |
| 32 | #include <linux/timer.h> |
| 33 | #include <linux/blkdev.h> |
| 34 | #include <linux/blk_types.h> |
| 35 | #include <linux/slab.h> |
| 36 | #include <linux/spinlock.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 37 | #include <linux/genhd.h> |
| 38 | #include <linux/cdrom.h> |
| 39 | #include <linux/file.h> |
| 40 | #include <scsi/scsi.h> |
| 41 | #include <scsi/scsi_device.h> |
| 42 | #include <scsi/scsi_cmnd.h> |
| 43 | #include <scsi/scsi_host.h> |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 44 | #include <scsi/scsi_tcq.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 45 | |
| 46 | #include <target/target_core_base.h> |
| 47 | #include <target/target_core_device.h> |
| 48 | #include <target/target_core_transport.h> |
| 49 | |
| 50 | #include "target_core_pscsi.h" |
| 51 | |
| 52 | #define ISPRINT(a) ((a >= ' ') && (a <= '~')) |
| 53 | |
| 54 | static struct se_subsystem_api pscsi_template; |
| 55 | |
| 56 | static void pscsi_req_done(struct request *, int); |
| 57 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 58 | /* pscsi_attach_hba(): |
| 59 | * |
| 60 | * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. |
| 61 | * from the passed SCSI Host ID. |
| 62 | */ |
| 63 | static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) |
| 64 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 65 | struct pscsi_hba_virt *phv; |
| 66 | |
| 67 | phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); |
| 68 | if (!(phv)) { |
| 69 | printk(KERN_ERR "Unable to allocate struct pscsi_hba_virt\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 70 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 71 | } |
| 72 | phv->phv_host_id = host_id; |
| 73 | phv->phv_mode = PHV_VIRUTAL_HOST_ID; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 74 | |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 75 | hba->hba_ptr = phv; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 76 | |
| 77 | printk(KERN_INFO "CORE_HBA[%d] - TCM SCSI HBA Driver %s on" |
| 78 | " Generic Target Core Stack %s\n", hba->hba_id, |
| 79 | PSCSI_VERSION, TARGET_CORE_MOD_VERSION); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 80 | printk(KERN_INFO "CORE_HBA[%d] - Attached SCSI HBA to Generic\n", |
| 81 | hba->hba_id); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 82 | |
| 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | static void pscsi_detach_hba(struct se_hba *hba) |
| 87 | { |
| 88 | struct pscsi_hba_virt *phv = hba->hba_ptr; |
| 89 | struct Scsi_Host *scsi_host = phv->phv_lld_host; |
| 90 | |
| 91 | if (scsi_host) { |
| 92 | scsi_host_put(scsi_host); |
| 93 | |
| 94 | printk(KERN_INFO "CORE_HBA[%d] - Detached SCSI HBA: %s from" |
| 95 | " Generic Target Core\n", hba->hba_id, |
| 96 | (scsi_host->hostt->name) ? (scsi_host->hostt->name) : |
| 97 | "Unknown"); |
| 98 | } else |
| 99 | printk(KERN_INFO "CORE_HBA[%d] - Detached Virtual SCSI HBA" |
| 100 | " from Generic Target Core\n", hba->hba_id); |
| 101 | |
| 102 | kfree(phv); |
| 103 | hba->hba_ptr = NULL; |
| 104 | } |
| 105 | |
| 106 | static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) |
| 107 | { |
| 108 | struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)hba->hba_ptr; |
| 109 | struct Scsi_Host *sh = phv->phv_lld_host; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 110 | /* |
| 111 | * Release the struct Scsi_Host |
| 112 | */ |
| 113 | if (!(mode_flag)) { |
| 114 | if (!(sh)) |
| 115 | return 0; |
| 116 | |
| 117 | phv->phv_lld_host = NULL; |
| 118 | phv->phv_mode = PHV_VIRUTAL_HOST_ID; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 119 | |
| 120 | printk(KERN_INFO "CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" |
| 121 | " %s\n", hba->hba_id, (sh->hostt->name) ? |
| 122 | (sh->hostt->name) : "Unknown"); |
| 123 | |
| 124 | scsi_host_put(sh); |
| 125 | return 0; |
| 126 | } |
| 127 | /* |
| 128 | * Otherwise, locate struct Scsi_Host from the original passed |
| 129 | * pSCSI Host ID and enable for phba mode |
| 130 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 131 | sh = scsi_host_lookup(phv->phv_host_id); |
| 132 | if (IS_ERR(sh)) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 133 | printk(KERN_ERR "pSCSI: Unable to locate SCSI Host for" |
| 134 | " phv_host_id: %d\n", phv->phv_host_id); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 135 | return PTR_ERR(sh); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 136 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 137 | |
| 138 | phv->phv_lld_host = sh; |
| 139 | phv->phv_mode = PHV_LLD_SCSI_HOST_NO; |
| 140 | |
| 141 | printk(KERN_INFO "CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", |
| 142 | hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); |
| 143 | |
| 144 | return 1; |
| 145 | } |
| 146 | |
| 147 | static void pscsi_tape_read_blocksize(struct se_device *dev, |
| 148 | struct scsi_device *sdev) |
| 149 | { |
| 150 | unsigned char cdb[MAX_COMMAND_SIZE], *buf; |
| 151 | int ret; |
| 152 | |
| 153 | buf = kzalloc(12, GFP_KERNEL); |
| 154 | if (!buf) |
| 155 | return; |
| 156 | |
| 157 | memset(cdb, 0, MAX_COMMAND_SIZE); |
| 158 | cdb[0] = MODE_SENSE; |
| 159 | cdb[4] = 0x0c; /* 12 bytes */ |
| 160 | |
| 161 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, |
| 162 | HZ, 1, NULL); |
| 163 | if (ret) |
| 164 | goto out_free; |
| 165 | |
| 166 | /* |
| 167 | * If MODE_SENSE still returns zero, set the default value to 1024. |
| 168 | */ |
| 169 | sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); |
| 170 | if (!sdev->sector_size) |
| 171 | sdev->sector_size = 1024; |
| 172 | out_free: |
| 173 | kfree(buf); |
| 174 | } |
| 175 | |
| 176 | static void |
| 177 | pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) |
| 178 | { |
| 179 | unsigned char *buf; |
| 180 | |
| 181 | if (sdev->inquiry_len < INQUIRY_LEN) |
| 182 | return; |
| 183 | |
| 184 | buf = sdev->inquiry; |
| 185 | if (!buf) |
| 186 | return; |
| 187 | /* |
| 188 | * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() |
| 189 | */ |
| 190 | memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); |
| 191 | memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); |
| 192 | memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); |
| 193 | } |
| 194 | |
| 195 | static int |
| 196 | pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) |
| 197 | { |
| 198 | unsigned char cdb[MAX_COMMAND_SIZE], *buf; |
| 199 | int ret; |
| 200 | |
| 201 | buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); |
| 202 | if (!buf) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 203 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 204 | |
| 205 | memset(cdb, 0, MAX_COMMAND_SIZE); |
| 206 | cdb[0] = INQUIRY; |
| 207 | cdb[1] = 0x01; /* Query VPD */ |
| 208 | cdb[2] = 0x80; /* Unit Serial Number */ |
| 209 | cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; |
| 210 | cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); |
| 211 | |
| 212 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, |
| 213 | INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); |
| 214 | if (ret) |
| 215 | goto out_free; |
| 216 | |
| 217 | snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); |
| 218 | |
| 219 | wwn->t10_sub_dev->su_dev_flags |= SDF_FIRMWARE_VPD_UNIT_SERIAL; |
| 220 | |
| 221 | kfree(buf); |
| 222 | return 0; |
| 223 | |
| 224 | out_free: |
| 225 | kfree(buf); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 226 | return -EPERM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | static void |
| 230 | pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, |
| 231 | struct t10_wwn *wwn) |
| 232 | { |
| 233 | unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; |
| 234 | int ident_len, page_len, off = 4, ret; |
| 235 | struct t10_vpd *vpd; |
| 236 | |
| 237 | buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); |
| 238 | if (!buf) |
| 239 | return; |
| 240 | |
| 241 | memset(cdb, 0, MAX_COMMAND_SIZE); |
| 242 | cdb[0] = INQUIRY; |
| 243 | cdb[1] = 0x01; /* Query VPD */ |
| 244 | cdb[2] = 0x83; /* Device Identifier */ |
| 245 | cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; |
| 246 | cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); |
| 247 | |
| 248 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, |
| 249 | INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, |
| 250 | NULL, HZ, 1, NULL); |
| 251 | if (ret) |
| 252 | goto out; |
| 253 | |
| 254 | page_len = (buf[2] << 8) | buf[3]; |
| 255 | while (page_len > 0) { |
| 256 | /* Grab a pointer to the Identification descriptor */ |
| 257 | page_83 = &buf[off]; |
| 258 | ident_len = page_83[3]; |
| 259 | if (!ident_len) { |
| 260 | printk(KERN_ERR "page_83[3]: identifier" |
| 261 | " length zero!\n"); |
| 262 | break; |
| 263 | } |
| 264 | printk(KERN_INFO "T10 VPD Identifer Length: %d\n", ident_len); |
| 265 | |
| 266 | vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); |
| 267 | if (!vpd) { |
| 268 | printk(KERN_ERR "Unable to allocate memory for" |
| 269 | " struct t10_vpd\n"); |
| 270 | goto out; |
| 271 | } |
| 272 | INIT_LIST_HEAD(&vpd->vpd_list); |
| 273 | |
| 274 | transport_set_vpd_proto_id(vpd, page_83); |
| 275 | transport_set_vpd_assoc(vpd, page_83); |
| 276 | |
| 277 | if (transport_set_vpd_ident_type(vpd, page_83) < 0) { |
| 278 | off += (ident_len + 4); |
| 279 | page_len -= (ident_len + 4); |
| 280 | kfree(vpd); |
| 281 | continue; |
| 282 | } |
| 283 | if (transport_set_vpd_ident(vpd, page_83) < 0) { |
| 284 | off += (ident_len + 4); |
| 285 | page_len -= (ident_len + 4); |
| 286 | kfree(vpd); |
| 287 | continue; |
| 288 | } |
| 289 | |
| 290 | list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); |
| 291 | off += (ident_len + 4); |
| 292 | page_len -= (ident_len + 4); |
| 293 | } |
| 294 | |
| 295 | out: |
| 296 | kfree(buf); |
| 297 | } |
| 298 | |
| 299 | /* pscsi_add_device_to_list(): |
| 300 | * |
| 301 | * |
| 302 | */ |
| 303 | static struct se_device *pscsi_add_device_to_list( |
| 304 | struct se_hba *hba, |
| 305 | struct se_subsystem_dev *se_dev, |
| 306 | struct pscsi_dev_virt *pdv, |
| 307 | struct scsi_device *sd, |
| 308 | int dev_flags) |
| 309 | { |
| 310 | struct se_device *dev; |
| 311 | struct se_dev_limits dev_limits; |
| 312 | struct request_queue *q; |
| 313 | struct queue_limits *limits; |
| 314 | |
| 315 | memset(&dev_limits, 0, sizeof(struct se_dev_limits)); |
| 316 | |
| 317 | if (!sd->queue_depth) { |
| 318 | sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; |
| 319 | |
| 320 | printk(KERN_ERR "Set broken SCSI Device %d:%d:%d" |
| 321 | " queue_depth to %d\n", sd->channel, sd->id, |
| 322 | sd->lun, sd->queue_depth); |
| 323 | } |
| 324 | /* |
| 325 | * Setup the local scope queue_limits from struct request_queue->limits |
| 326 | * to pass into transport_add_device_to_core_hba() as struct se_dev_limits. |
| 327 | */ |
| 328 | q = sd->request_queue; |
| 329 | limits = &dev_limits.limits; |
| 330 | limits->logical_block_size = sd->sector_size; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 331 | limits->max_hw_sectors = min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q)); |
| 332 | limits->max_sectors = min_t(int, sd->host->max_sectors, queue_max_sectors(q)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 333 | dev_limits.hw_queue_depth = sd->queue_depth; |
| 334 | dev_limits.queue_depth = sd->queue_depth; |
| 335 | /* |
| 336 | * Setup our standard INQUIRY info into se_dev->t10_wwn |
| 337 | */ |
| 338 | pscsi_set_inquiry_info(sd, &se_dev->t10_wwn); |
| 339 | |
| 340 | /* |
| 341 | * Set the pointer pdv->pdv_sd to from passed struct scsi_device, |
| 342 | * which has already been referenced with Linux SCSI code with |
| 343 | * scsi_device_get() in this file's pscsi_create_virtdevice(). |
| 344 | * |
| 345 | * The passthrough operations called by the transport_add_device_* |
| 346 | * function below will require this pointer to be set for passthroug |
| 347 | * ops. |
| 348 | * |
| 349 | * For the shutdown case in pscsi_free_device(), this struct |
| 350 | * scsi_device reference is released with Linux SCSI code |
| 351 | * scsi_device_put() and the pdv->pdv_sd cleared. |
| 352 | */ |
| 353 | pdv->pdv_sd = sd; |
| 354 | |
| 355 | dev = transport_add_device_to_core_hba(hba, &pscsi_template, |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 356 | se_dev, dev_flags, pdv, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 357 | &dev_limits, NULL, NULL); |
| 358 | if (!(dev)) { |
| 359 | pdv->pdv_sd = NULL; |
| 360 | return NULL; |
| 361 | } |
| 362 | |
| 363 | /* |
| 364 | * Locate VPD WWN Information used for various purposes within |
| 365 | * the Storage Engine. |
| 366 | */ |
| 367 | if (!pscsi_get_inquiry_vpd_serial(sd, &se_dev->t10_wwn)) { |
| 368 | /* |
| 369 | * If VPD Unit Serial returned GOOD status, try |
| 370 | * VPD Device Identification page (0x83). |
| 371 | */ |
| 372 | pscsi_get_inquiry_vpd_device_ident(sd, &se_dev->t10_wwn); |
| 373 | } |
| 374 | |
| 375 | /* |
| 376 | * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. |
| 377 | */ |
| 378 | if (sd->type == TYPE_TAPE) |
| 379 | pscsi_tape_read_blocksize(dev, sd); |
| 380 | return dev; |
| 381 | } |
| 382 | |
| 383 | static void *pscsi_allocate_virtdevice(struct se_hba *hba, const char *name) |
| 384 | { |
| 385 | struct pscsi_dev_virt *pdv; |
| 386 | |
| 387 | pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); |
| 388 | if (!(pdv)) { |
| 389 | printk(KERN_ERR "Unable to allocate memory for struct pscsi_dev_virt\n"); |
| 390 | return NULL; |
| 391 | } |
| 392 | pdv->pdv_se_hba = hba; |
| 393 | |
| 394 | printk(KERN_INFO "PSCSI: Allocated pdv: %p for %s\n", pdv, name); |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 395 | return pdv; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | /* |
| 399 | * Called with struct Scsi_Host->host_lock called. |
| 400 | */ |
| 401 | static struct se_device *pscsi_create_type_disk( |
| 402 | struct scsi_device *sd, |
| 403 | struct pscsi_dev_virt *pdv, |
| 404 | struct se_subsystem_dev *se_dev, |
| 405 | struct se_hba *hba) |
Dan Carpenter | 5dd7ed2e | 2011-03-14 04:06:01 -0700 | [diff] [blame] | 406 | __releases(sh->host_lock) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 407 | { |
| 408 | struct se_device *dev; |
| 409 | struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)pdv->pdv_se_hba->hba_ptr; |
| 410 | struct Scsi_Host *sh = sd->host; |
| 411 | struct block_device *bd; |
| 412 | u32 dev_flags = 0; |
| 413 | |
| 414 | if (scsi_device_get(sd)) { |
| 415 | printk(KERN_ERR "scsi_device_get() failed for %d:%d:%d:%d\n", |
| 416 | sh->host_no, sd->channel, sd->id, sd->lun); |
| 417 | spin_unlock_irq(sh->host_lock); |
| 418 | return NULL; |
| 419 | } |
| 420 | spin_unlock_irq(sh->host_lock); |
| 421 | /* |
| 422 | * Claim exclusive struct block_device access to struct scsi_device |
| 423 | * for TYPE_DISK using supplied udev_path |
| 424 | */ |
| 425 | bd = blkdev_get_by_path(se_dev->se_dev_udev_path, |
| 426 | FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); |
Dan Carpenter | 3ae279d | 2011-02-09 15:34:36 -0800 | [diff] [blame] | 427 | if (IS_ERR(bd)) { |
| 428 | printk(KERN_ERR "pSCSI: blkdev_get_by_path() failed\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 429 | scsi_device_put(sd); |
| 430 | return NULL; |
| 431 | } |
| 432 | pdv->pdv_bd = bd; |
| 433 | |
| 434 | dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); |
| 435 | if (!(dev)) { |
| 436 | blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); |
| 437 | scsi_device_put(sd); |
| 438 | return NULL; |
| 439 | } |
| 440 | printk(KERN_INFO "CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%d\n", |
| 441 | phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); |
| 442 | |
| 443 | return dev; |
| 444 | } |
| 445 | |
| 446 | /* |
| 447 | * Called with struct Scsi_Host->host_lock called. |
| 448 | */ |
| 449 | static struct se_device *pscsi_create_type_rom( |
| 450 | struct scsi_device *sd, |
| 451 | struct pscsi_dev_virt *pdv, |
| 452 | struct se_subsystem_dev *se_dev, |
| 453 | struct se_hba *hba) |
Dan Carpenter | 5dd7ed2e | 2011-03-14 04:06:01 -0700 | [diff] [blame] | 454 | __releases(sh->host_lock) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 455 | { |
| 456 | struct se_device *dev; |
| 457 | struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)pdv->pdv_se_hba->hba_ptr; |
| 458 | struct Scsi_Host *sh = sd->host; |
| 459 | u32 dev_flags = 0; |
| 460 | |
| 461 | if (scsi_device_get(sd)) { |
| 462 | printk(KERN_ERR "scsi_device_get() failed for %d:%d:%d:%d\n", |
| 463 | sh->host_no, sd->channel, sd->id, sd->lun); |
| 464 | spin_unlock_irq(sh->host_lock); |
| 465 | return NULL; |
| 466 | } |
| 467 | spin_unlock_irq(sh->host_lock); |
| 468 | |
| 469 | dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); |
| 470 | if (!(dev)) { |
| 471 | scsi_device_put(sd); |
| 472 | return NULL; |
| 473 | } |
| 474 | printk(KERN_INFO "CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", |
| 475 | phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, |
| 476 | sd->channel, sd->id, sd->lun); |
| 477 | |
| 478 | return dev; |
| 479 | } |
| 480 | |
| 481 | /* |
| 482 | *Called with struct Scsi_Host->host_lock called. |
| 483 | */ |
| 484 | static struct se_device *pscsi_create_type_other( |
| 485 | struct scsi_device *sd, |
| 486 | struct pscsi_dev_virt *pdv, |
| 487 | struct se_subsystem_dev *se_dev, |
| 488 | struct se_hba *hba) |
Dan Carpenter | 5dd7ed2e | 2011-03-14 04:06:01 -0700 | [diff] [blame] | 489 | __releases(sh->host_lock) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 490 | { |
| 491 | struct se_device *dev; |
| 492 | struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)pdv->pdv_se_hba->hba_ptr; |
| 493 | struct Scsi_Host *sh = sd->host; |
| 494 | u32 dev_flags = 0; |
| 495 | |
| 496 | spin_unlock_irq(sh->host_lock); |
| 497 | dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); |
| 498 | if (!(dev)) |
| 499 | return NULL; |
| 500 | |
| 501 | printk(KERN_INFO "CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", |
| 502 | phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, |
| 503 | sd->channel, sd->id, sd->lun); |
| 504 | |
| 505 | return dev; |
| 506 | } |
| 507 | |
| 508 | static struct se_device *pscsi_create_virtdevice( |
| 509 | struct se_hba *hba, |
| 510 | struct se_subsystem_dev *se_dev, |
| 511 | void *p) |
| 512 | { |
| 513 | struct pscsi_dev_virt *pdv = (struct pscsi_dev_virt *)p; |
| 514 | struct se_device *dev; |
| 515 | struct scsi_device *sd; |
| 516 | struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)hba->hba_ptr; |
| 517 | struct Scsi_Host *sh = phv->phv_lld_host; |
| 518 | int legacy_mode_enable = 0; |
| 519 | |
| 520 | if (!(pdv)) { |
| 521 | printk(KERN_ERR "Unable to locate struct pscsi_dev_virt" |
| 522 | " parameter\n"); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 523 | return ERR_PTR(-EINVAL); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 524 | } |
| 525 | /* |
| 526 | * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the |
| 527 | * struct Scsi_Host we will need to bring the TCM/pSCSI object online |
| 528 | */ |
| 529 | if (!(sh)) { |
| 530 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { |
| 531 | printk(KERN_ERR "pSCSI: Unable to locate struct" |
| 532 | " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 533 | return ERR_PTR(-ENODEV); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 534 | } |
| 535 | /* |
| 536 | * For the newer PHV_VIRUTAL_HOST_ID struct scsi_device |
| 537 | * reference, we enforce that udev_path has been set |
| 538 | */ |
| 539 | if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) { |
| 540 | printk(KERN_ERR "pSCSI: udev_path attribute has not" |
| 541 | " been set before ENABLE=1\n"); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 542 | return ERR_PTR(-EINVAL); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 543 | } |
| 544 | /* |
| 545 | * If no scsi_host_id= was passed for PHV_VIRUTAL_HOST_ID, |
| 546 | * use the original TCM hba ID to reference Linux/SCSI Host No |
| 547 | * and enable for PHV_LLD_SCSI_HOST_NO mode. |
| 548 | */ |
| 549 | if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { |
| 550 | spin_lock(&hba->device_lock); |
| 551 | if (!(list_empty(&hba->hba_dev_list))) { |
| 552 | printk(KERN_ERR "pSCSI: Unable to set hba_mode" |
| 553 | " with active devices\n"); |
| 554 | spin_unlock(&hba->device_lock); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 555 | return ERR_PTR(-EEXIST); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 556 | } |
| 557 | spin_unlock(&hba->device_lock); |
| 558 | |
| 559 | if (pscsi_pmode_enable_hba(hba, 1) != 1) |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 560 | return ERR_PTR(-ENODEV); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 561 | |
| 562 | legacy_mode_enable = 1; |
| 563 | hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; |
| 564 | sh = phv->phv_lld_host; |
| 565 | } else { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 566 | sh = scsi_host_lookup(pdv->pdv_host_id); |
| 567 | if (IS_ERR(sh)) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 568 | printk(KERN_ERR "pSCSI: Unable to locate" |
| 569 | " pdv_host_id: %d\n", pdv->pdv_host_id); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 570 | return (struct se_device *) sh; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 571 | } |
| 572 | } |
| 573 | } else { |
| 574 | if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) { |
| 575 | printk(KERN_ERR "pSCSI: PHV_VIRUTAL_HOST_ID set while" |
| 576 | " struct Scsi_Host exists\n"); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 577 | return ERR_PTR(-EEXIST); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 578 | } |
| 579 | } |
| 580 | |
| 581 | spin_lock_irq(sh->host_lock); |
| 582 | list_for_each_entry(sd, &sh->__devices, siblings) { |
| 583 | if ((pdv->pdv_channel_id != sd->channel) || |
| 584 | (pdv->pdv_target_id != sd->id) || |
| 585 | (pdv->pdv_lun_id != sd->lun)) |
| 586 | continue; |
| 587 | /* |
| 588 | * Functions will release the held struct scsi_host->host_lock |
| 589 | * before calling calling pscsi_add_device_to_list() to register |
| 590 | * struct scsi_device with target_core_mod. |
| 591 | */ |
| 592 | switch (sd->type) { |
| 593 | case TYPE_DISK: |
| 594 | dev = pscsi_create_type_disk(sd, pdv, se_dev, hba); |
| 595 | break; |
| 596 | case TYPE_ROM: |
| 597 | dev = pscsi_create_type_rom(sd, pdv, se_dev, hba); |
| 598 | break; |
| 599 | default: |
| 600 | dev = pscsi_create_type_other(sd, pdv, se_dev, hba); |
| 601 | break; |
| 602 | } |
| 603 | |
| 604 | if (!(dev)) { |
| 605 | if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) |
| 606 | scsi_host_put(sh); |
| 607 | else if (legacy_mode_enable) { |
| 608 | pscsi_pmode_enable_hba(hba, 0); |
| 609 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; |
| 610 | } |
| 611 | pdv->pdv_sd = NULL; |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 612 | return ERR_PTR(-ENODEV); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 613 | } |
| 614 | return dev; |
| 615 | } |
| 616 | spin_unlock_irq(sh->host_lock); |
| 617 | |
| 618 | printk(KERN_ERR "pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, |
| 619 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); |
| 620 | |
| 621 | if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) |
| 622 | scsi_host_put(sh); |
| 623 | else if (legacy_mode_enable) { |
| 624 | pscsi_pmode_enable_hba(hba, 0); |
| 625 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; |
| 626 | } |
| 627 | |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 628 | return ERR_PTR(-ENODEV); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | /* pscsi_free_device(): (Part of se_subsystem_api_t template) |
| 632 | * |
| 633 | * |
| 634 | */ |
| 635 | static void pscsi_free_device(void *p) |
| 636 | { |
| 637 | struct pscsi_dev_virt *pdv = p; |
| 638 | struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; |
| 639 | struct scsi_device *sd = pdv->pdv_sd; |
| 640 | |
| 641 | if (sd) { |
| 642 | /* |
| 643 | * Release exclusive pSCSI internal struct block_device claim for |
| 644 | * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() |
| 645 | */ |
| 646 | if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { |
| 647 | blkdev_put(pdv->pdv_bd, |
| 648 | FMODE_WRITE|FMODE_READ|FMODE_EXCL); |
| 649 | pdv->pdv_bd = NULL; |
| 650 | } |
| 651 | /* |
| 652 | * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference |
| 653 | * to struct Scsi_Host now. |
| 654 | */ |
| 655 | if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && |
| 656 | (phv->phv_lld_host != NULL)) |
| 657 | scsi_host_put(phv->phv_lld_host); |
| 658 | |
| 659 | if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) |
| 660 | scsi_device_put(sd); |
| 661 | |
| 662 | pdv->pdv_sd = NULL; |
| 663 | } |
| 664 | |
| 665 | kfree(pdv); |
| 666 | } |
| 667 | |
| 668 | static inline struct pscsi_plugin_task *PSCSI_TASK(struct se_task *task) |
| 669 | { |
| 670 | return container_of(task, struct pscsi_plugin_task, pscsi_task); |
| 671 | } |
| 672 | |
| 673 | |
| 674 | /* pscsi_transport_complete(): |
| 675 | * |
| 676 | * |
| 677 | */ |
| 678 | static int pscsi_transport_complete(struct se_task *task) |
| 679 | { |
| 680 | struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; |
| 681 | struct scsi_device *sd = pdv->pdv_sd; |
| 682 | int result; |
| 683 | struct pscsi_plugin_task *pt = PSCSI_TASK(task); |
| 684 | unsigned char *cdb = &pt->pscsi_cdb[0]; |
| 685 | |
| 686 | result = pt->pscsi_result; |
| 687 | /* |
| 688 | * Hack to make sure that Write-Protect modepage is set if R/O mode is |
| 689 | * forced. |
| 690 | */ |
| 691 | if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && |
| 692 | (status_byte(result) << 1) == SAM_STAT_GOOD) { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 693 | if (!task->task_se_cmd->se_deve) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 694 | goto after_mode_sense; |
| 695 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 696 | if (task->task_se_cmd->se_deve->lun_flags & |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 697 | TRANSPORT_LUNFLAGS_READ_ONLY) { |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame^] | 698 | unsigned char *buf = transport_kmap_first_data_page(task->task_se_cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 699 | |
| 700 | if (cdb[0] == MODE_SENSE_10) { |
| 701 | if (!(buf[3] & 0x80)) |
| 702 | buf[3] |= 0x80; |
| 703 | } else { |
| 704 | if (!(buf[2] & 0x80)) |
| 705 | buf[2] |= 0x80; |
| 706 | } |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame^] | 707 | |
| 708 | transport_kunmap_first_data_page(task->task_se_cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 709 | } |
| 710 | } |
| 711 | after_mode_sense: |
| 712 | |
| 713 | if (sd->type != TYPE_TAPE) |
| 714 | goto after_mode_select; |
| 715 | |
| 716 | /* |
| 717 | * Hack to correctly obtain the initiator requested blocksize for |
| 718 | * TYPE_TAPE. Since this value is dependent upon each tape media, |
| 719 | * struct scsi_device->sector_size will not contain the correct value |
| 720 | * by default, so we go ahead and set it so |
| 721 | * TRANSPORT(dev)->get_blockdev() returns the correct value to the |
| 722 | * storage engine. |
| 723 | */ |
| 724 | if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && |
| 725 | (status_byte(result) << 1) == SAM_STAT_GOOD) { |
| 726 | unsigned char *buf; |
| 727 | struct scatterlist *sg = task->task_sg; |
| 728 | u16 bdl; |
| 729 | u32 blocksize; |
| 730 | |
| 731 | buf = sg_virt(&sg[0]); |
| 732 | if (!(buf)) { |
| 733 | printk(KERN_ERR "Unable to get buf for scatterlist\n"); |
| 734 | goto after_mode_select; |
| 735 | } |
| 736 | |
| 737 | if (cdb[0] == MODE_SELECT) |
| 738 | bdl = (buf[3]); |
| 739 | else |
| 740 | bdl = (buf[6] << 8) | (buf[7]); |
| 741 | |
| 742 | if (!bdl) |
| 743 | goto after_mode_select; |
| 744 | |
| 745 | if (cdb[0] == MODE_SELECT) |
| 746 | blocksize = (buf[9] << 16) | (buf[10] << 8) | |
| 747 | (buf[11]); |
| 748 | else |
| 749 | blocksize = (buf[13] << 16) | (buf[14] << 8) | |
| 750 | (buf[15]); |
| 751 | |
| 752 | sd->sector_size = blocksize; |
| 753 | } |
| 754 | after_mode_select: |
| 755 | |
| 756 | if (status_byte(result) & CHECK_CONDITION) |
| 757 | return 1; |
| 758 | |
| 759 | return 0; |
| 760 | } |
| 761 | |
| 762 | static struct se_task * |
| 763 | pscsi_alloc_task(struct se_cmd *cmd) |
| 764 | { |
| 765 | struct pscsi_plugin_task *pt; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 766 | unsigned char *cdb = cmd->t_task_cdb; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 767 | |
| 768 | pt = kzalloc(sizeof(struct pscsi_plugin_task), GFP_KERNEL); |
| 769 | if (!pt) { |
| 770 | printk(KERN_ERR "Unable to allocate struct pscsi_plugin_task\n"); |
| 771 | return NULL; |
| 772 | } |
| 773 | |
| 774 | /* |
| 775 | * If TCM Core is signaling a > TCM_MAX_COMMAND_SIZE allocation, |
| 776 | * allocate the extended CDB buffer for per struct se_task context |
| 777 | * pt->pscsi_cdb now. |
| 778 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 779 | if (cmd->t_task_cdb != cmd->__t_task_cdb) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 780 | |
| 781 | pt->pscsi_cdb = kzalloc(scsi_command_size(cdb), GFP_KERNEL); |
| 782 | if (!(pt->pscsi_cdb)) { |
| 783 | printk(KERN_ERR "pSCSI: Unable to allocate extended" |
| 784 | " pt->pscsi_cdb\n"); |
Roland Dreier | 8fc1858 | 2011-03-14 04:05:55 -0700 | [diff] [blame] | 785 | kfree(pt); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 786 | return NULL; |
| 787 | } |
| 788 | } else |
| 789 | pt->pscsi_cdb = &pt->__pscsi_cdb[0]; |
| 790 | |
| 791 | return &pt->pscsi_task; |
| 792 | } |
| 793 | |
| 794 | static inline void pscsi_blk_init_request( |
| 795 | struct se_task *task, |
| 796 | struct pscsi_plugin_task *pt, |
| 797 | struct request *req, |
| 798 | int bidi_read) |
| 799 | { |
| 800 | /* |
| 801 | * Defined as "scsi command" in include/linux/blkdev.h. |
| 802 | */ |
| 803 | req->cmd_type = REQ_TYPE_BLOCK_PC; |
| 804 | /* |
| 805 | * For the extra BIDI-COMMAND READ struct request we do not |
| 806 | * need to setup the remaining structure members |
| 807 | */ |
| 808 | if (bidi_read) |
| 809 | return; |
| 810 | /* |
| 811 | * Setup the done function pointer for struct request, |
| 812 | * also set the end_io_data pointer.to struct se_task. |
| 813 | */ |
| 814 | req->end_io = pscsi_req_done; |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 815 | req->end_io_data = task; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 816 | /* |
| 817 | * Load the referenced struct se_task's SCSI CDB into |
| 818 | * include/linux/blkdev.h:struct request->cmd |
| 819 | */ |
| 820 | req->cmd_len = scsi_command_size(pt->pscsi_cdb); |
| 821 | req->cmd = &pt->pscsi_cdb[0]; |
| 822 | /* |
| 823 | * Setup pointer for outgoing sense data. |
| 824 | */ |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 825 | req->sense = &pt->pscsi_sense[0]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 826 | req->sense_len = 0; |
| 827 | } |
| 828 | |
| 829 | /* |
| 830 | * Used for pSCSI data payloads for all *NON* SCF_SCSI_DATA_SG_IO_CDB |
| 831 | */ |
| 832 | static int pscsi_blk_get_request(struct se_task *task) |
| 833 | { |
| 834 | struct pscsi_plugin_task *pt = PSCSI_TASK(task); |
| 835 | struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; |
| 836 | |
| 837 | pt->pscsi_req = blk_get_request(pdv->pdv_sd->request_queue, |
| 838 | (task->task_data_direction == DMA_TO_DEVICE), |
| 839 | GFP_KERNEL); |
| 840 | if (!(pt->pscsi_req) || IS_ERR(pt->pscsi_req)) { |
| 841 | printk(KERN_ERR "PSCSI: blk_get_request() failed: %ld\n", |
| 842 | IS_ERR(pt->pscsi_req)); |
| 843 | return PYX_TRANSPORT_LU_COMM_FAILURE; |
| 844 | } |
| 845 | /* |
| 846 | * Setup the newly allocated struct request for REQ_TYPE_BLOCK_PC, |
| 847 | * and setup rq callback, CDB and sense. |
| 848 | */ |
| 849 | pscsi_blk_init_request(task, pt, pt->pscsi_req, 0); |
| 850 | return 0; |
| 851 | } |
| 852 | |
| 853 | /* pscsi_do_task(): (Part of se_subsystem_api_t template) |
| 854 | * |
| 855 | * |
| 856 | */ |
| 857 | static int pscsi_do_task(struct se_task *task) |
| 858 | { |
| 859 | struct pscsi_plugin_task *pt = PSCSI_TASK(task); |
| 860 | struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; |
| 861 | /* |
| 862 | * Set the struct request->timeout value based on peripheral |
| 863 | * device type from SCSI. |
| 864 | */ |
| 865 | if (pdv->pdv_sd->type == TYPE_DISK) |
| 866 | pt->pscsi_req->timeout = PS_TIMEOUT_DISK; |
| 867 | else |
| 868 | pt->pscsi_req->timeout = PS_TIMEOUT_OTHER; |
| 869 | |
| 870 | pt->pscsi_req->retries = PS_RETRY; |
| 871 | /* |
| 872 | * Queue the struct request into the struct scsi_device->request_queue. |
| 873 | * Also check for HEAD_OF_QUEUE SAM TASK attr from received se_cmd |
| 874 | * descriptor |
| 875 | */ |
| 876 | blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, pt->pscsi_req, |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 877 | (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 878 | pscsi_req_done); |
| 879 | |
| 880 | return PYX_TRANSPORT_SENT_TO_TRANSPORT; |
| 881 | } |
| 882 | |
| 883 | static void pscsi_free_task(struct se_task *task) |
| 884 | { |
| 885 | struct pscsi_plugin_task *pt = PSCSI_TASK(task); |
| 886 | struct se_cmd *cmd = task->task_se_cmd; |
| 887 | |
| 888 | /* |
| 889 | * Release the extended CDB allocation from pscsi_alloc_task() |
| 890 | * if one exists. |
| 891 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 892 | if (cmd->t_task_cdb != cmd->__t_task_cdb) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 893 | kfree(pt->pscsi_cdb); |
| 894 | /* |
| 895 | * We do not release the bio(s) here associated with this task, as |
| 896 | * this is handled by bio_put() and pscsi_bi_endio(). |
| 897 | */ |
| 898 | kfree(pt); |
| 899 | } |
| 900 | |
| 901 | enum { |
| 902 | Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, |
| 903 | Opt_scsi_lun_id, Opt_err |
| 904 | }; |
| 905 | |
| 906 | static match_table_t tokens = { |
| 907 | {Opt_scsi_host_id, "scsi_host_id=%d"}, |
| 908 | {Opt_scsi_channel_id, "scsi_channel_id=%d"}, |
| 909 | {Opt_scsi_target_id, "scsi_target_id=%d"}, |
| 910 | {Opt_scsi_lun_id, "scsi_lun_id=%d"}, |
| 911 | {Opt_err, NULL} |
| 912 | }; |
| 913 | |
| 914 | static ssize_t pscsi_set_configfs_dev_params(struct se_hba *hba, |
| 915 | struct se_subsystem_dev *se_dev, |
| 916 | const char *page, |
| 917 | ssize_t count) |
| 918 | { |
| 919 | struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; |
| 920 | struct pscsi_hba_virt *phv = hba->hba_ptr; |
| 921 | char *orig, *ptr, *opts; |
| 922 | substring_t args[MAX_OPT_ARGS]; |
| 923 | int ret = 0, arg, token; |
| 924 | |
| 925 | opts = kstrdup(page, GFP_KERNEL); |
| 926 | if (!opts) |
| 927 | return -ENOMEM; |
| 928 | |
| 929 | orig = opts; |
| 930 | |
| 931 | while ((ptr = strsep(&opts, ",")) != NULL) { |
| 932 | if (!*ptr) |
| 933 | continue; |
| 934 | |
| 935 | token = match_token(ptr, tokens, args); |
| 936 | switch (token) { |
| 937 | case Opt_scsi_host_id: |
| 938 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { |
| 939 | printk(KERN_ERR "PSCSI[%d]: Unable to accept" |
| 940 | " scsi_host_id while phv_mode ==" |
| 941 | " PHV_LLD_SCSI_HOST_NO\n", |
| 942 | phv->phv_host_id); |
| 943 | ret = -EINVAL; |
| 944 | goto out; |
| 945 | } |
| 946 | match_int(args, &arg); |
| 947 | pdv->pdv_host_id = arg; |
| 948 | printk(KERN_INFO "PSCSI[%d]: Referencing SCSI Host ID:" |
| 949 | " %d\n", phv->phv_host_id, pdv->pdv_host_id); |
| 950 | pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; |
| 951 | break; |
| 952 | case Opt_scsi_channel_id: |
| 953 | match_int(args, &arg); |
| 954 | pdv->pdv_channel_id = arg; |
| 955 | printk(KERN_INFO "PSCSI[%d]: Referencing SCSI Channel" |
| 956 | " ID: %d\n", phv->phv_host_id, |
| 957 | pdv->pdv_channel_id); |
| 958 | pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; |
| 959 | break; |
| 960 | case Opt_scsi_target_id: |
| 961 | match_int(args, &arg); |
| 962 | pdv->pdv_target_id = arg; |
| 963 | printk(KERN_INFO "PSCSI[%d]: Referencing SCSI Target" |
| 964 | " ID: %d\n", phv->phv_host_id, |
| 965 | pdv->pdv_target_id); |
| 966 | pdv->pdv_flags |= PDF_HAS_TARGET_ID; |
| 967 | break; |
| 968 | case Opt_scsi_lun_id: |
| 969 | match_int(args, &arg); |
| 970 | pdv->pdv_lun_id = arg; |
| 971 | printk(KERN_INFO "PSCSI[%d]: Referencing SCSI LUN ID:" |
| 972 | " %d\n", phv->phv_host_id, pdv->pdv_lun_id); |
| 973 | pdv->pdv_flags |= PDF_HAS_LUN_ID; |
| 974 | break; |
| 975 | default: |
| 976 | break; |
| 977 | } |
| 978 | } |
| 979 | |
| 980 | out: |
| 981 | kfree(orig); |
| 982 | return (!ret) ? count : ret; |
| 983 | } |
| 984 | |
| 985 | static ssize_t pscsi_check_configfs_dev_params( |
| 986 | struct se_hba *hba, |
| 987 | struct se_subsystem_dev *se_dev) |
| 988 | { |
| 989 | struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; |
| 990 | |
| 991 | if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || |
| 992 | !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || |
| 993 | !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { |
| 994 | printk(KERN_ERR "Missing scsi_channel_id=, scsi_target_id= and" |
| 995 | " scsi_lun_id= parameters\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 996 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 997 | } |
| 998 | |
| 999 | return 0; |
| 1000 | } |
| 1001 | |
| 1002 | static ssize_t pscsi_show_configfs_dev_params(struct se_hba *hba, |
| 1003 | struct se_subsystem_dev *se_dev, |
| 1004 | char *b) |
| 1005 | { |
| 1006 | struct pscsi_hba_virt *phv = hba->hba_ptr; |
| 1007 | struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; |
| 1008 | struct scsi_device *sd = pdv->pdv_sd; |
| 1009 | unsigned char host_id[16]; |
| 1010 | ssize_t bl; |
| 1011 | int i; |
| 1012 | |
| 1013 | if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) |
| 1014 | snprintf(host_id, 16, "%d", pdv->pdv_host_id); |
| 1015 | else |
| 1016 | snprintf(host_id, 16, "PHBA Mode"); |
| 1017 | |
| 1018 | bl = sprintf(b, "SCSI Device Bus Location:" |
| 1019 | " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", |
| 1020 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, |
| 1021 | host_id); |
| 1022 | |
| 1023 | if (sd) { |
| 1024 | bl += sprintf(b + bl, " "); |
| 1025 | bl += sprintf(b + bl, "Vendor: "); |
| 1026 | for (i = 0; i < 8; i++) { |
| 1027 | if (ISPRINT(sd->vendor[i])) /* printable character? */ |
| 1028 | bl += sprintf(b + bl, "%c", sd->vendor[i]); |
| 1029 | else |
| 1030 | bl += sprintf(b + bl, " "); |
| 1031 | } |
| 1032 | bl += sprintf(b + bl, " Model: "); |
| 1033 | for (i = 0; i < 16; i++) { |
| 1034 | if (ISPRINT(sd->model[i])) /* printable character ? */ |
| 1035 | bl += sprintf(b + bl, "%c", sd->model[i]); |
| 1036 | else |
| 1037 | bl += sprintf(b + bl, " "); |
| 1038 | } |
| 1039 | bl += sprintf(b + bl, " Rev: "); |
| 1040 | for (i = 0; i < 4; i++) { |
| 1041 | if (ISPRINT(sd->rev[i])) /* printable character ? */ |
| 1042 | bl += sprintf(b + bl, "%c", sd->rev[i]); |
| 1043 | else |
| 1044 | bl += sprintf(b + bl, " "); |
| 1045 | } |
| 1046 | bl += sprintf(b + bl, "\n"); |
| 1047 | } |
| 1048 | return bl; |
| 1049 | } |
| 1050 | |
| 1051 | static void pscsi_bi_endio(struct bio *bio, int error) |
| 1052 | { |
| 1053 | bio_put(bio); |
| 1054 | } |
| 1055 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1056 | static inline struct bio *pscsi_get_bio(int sg_num) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1057 | { |
| 1058 | struct bio *bio; |
| 1059 | /* |
| 1060 | * Use bio_malloc() following the comment in for bio -> struct request |
| 1061 | * in block/blk-core.c:blk_make_request() |
| 1062 | */ |
| 1063 | bio = bio_kmalloc(GFP_KERNEL, sg_num); |
| 1064 | if (!(bio)) { |
| 1065 | printk(KERN_ERR "PSCSI: bio_kmalloc() failed\n"); |
| 1066 | return NULL; |
| 1067 | } |
| 1068 | bio->bi_end_io = pscsi_bi_endio; |
| 1069 | |
| 1070 | return bio; |
| 1071 | } |
| 1072 | |
| 1073 | #if 0 |
| 1074 | #define DEBUG_PSCSI(x...) printk(x) |
| 1075 | #else |
| 1076 | #define DEBUG_PSCSI(x...) |
| 1077 | #endif |
| 1078 | |
| 1079 | static int __pscsi_map_task_SG( |
| 1080 | struct se_task *task, |
| 1081 | struct scatterlist *task_sg, |
| 1082 | u32 task_sg_num, |
| 1083 | int bidi_read) |
| 1084 | { |
| 1085 | struct pscsi_plugin_task *pt = PSCSI_TASK(task); |
| 1086 | struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; |
| 1087 | struct bio *bio = NULL, *hbio = NULL, *tbio = NULL; |
| 1088 | struct page *page; |
| 1089 | struct scatterlist *sg; |
| 1090 | u32 data_len = task->task_size, i, len, bytes, off; |
| 1091 | int nr_pages = (task->task_size + task_sg[0].offset + |
| 1092 | PAGE_SIZE - 1) >> PAGE_SHIFT; |
| 1093 | int nr_vecs = 0, rc, ret = PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES; |
| 1094 | int rw = (task->task_data_direction == DMA_TO_DEVICE); |
| 1095 | |
| 1096 | if (!task->task_size) |
| 1097 | return 0; |
| 1098 | /* |
| 1099 | * For SCF_SCSI_DATA_SG_IO_CDB, Use fs/bio.c:bio_add_page() to setup |
| 1100 | * the bio_vec maplist from TC< struct se_mem -> task->task_sg -> |
| 1101 | * struct scatterlist memory. The struct se_task->task_sg[] currently needs |
| 1102 | * to be attached to struct bios for submission to Linux/SCSI using |
| 1103 | * struct request to struct scsi_device->request_queue. |
| 1104 | * |
| 1105 | * Note that this will be changing post v2.6.28 as Target_Core_Mod/pSCSI |
| 1106 | * is ported to upstream SCSI passthrough functionality that accepts |
| 1107 | * struct scatterlist->page_link or struct page as a paraemeter. |
| 1108 | */ |
| 1109 | DEBUG_PSCSI("PSCSI: nr_pages: %d\n", nr_pages); |
| 1110 | |
| 1111 | for_each_sg(task_sg, sg, task_sg_num, i) { |
| 1112 | page = sg_page(sg); |
| 1113 | off = sg->offset; |
| 1114 | len = sg->length; |
| 1115 | |
| 1116 | DEBUG_PSCSI("PSCSI: i: %d page: %p len: %d off: %d\n", i, |
| 1117 | page, len, off); |
| 1118 | |
| 1119 | while (len > 0 && data_len > 0) { |
| 1120 | bytes = min_t(unsigned int, len, PAGE_SIZE - off); |
| 1121 | bytes = min(bytes, data_len); |
| 1122 | |
| 1123 | if (!(bio)) { |
| 1124 | nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); |
| 1125 | nr_pages -= nr_vecs; |
| 1126 | /* |
| 1127 | * Calls bio_kmalloc() and sets bio->bi_end_io() |
| 1128 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1129 | bio = pscsi_get_bio(nr_vecs); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1130 | if (!(bio)) |
| 1131 | goto fail; |
| 1132 | |
| 1133 | if (rw) |
| 1134 | bio->bi_rw |= REQ_WRITE; |
| 1135 | |
| 1136 | DEBUG_PSCSI("PSCSI: Allocated bio: %p," |
| 1137 | " dir: %s nr_vecs: %d\n", bio, |
| 1138 | (rw) ? "rw" : "r", nr_vecs); |
| 1139 | /* |
| 1140 | * Set *hbio pointer to handle the case: |
| 1141 | * nr_pages > BIO_MAX_PAGES, where additional |
| 1142 | * bios need to be added to complete a given |
| 1143 | * struct se_task |
| 1144 | */ |
| 1145 | if (!hbio) |
| 1146 | hbio = tbio = bio; |
| 1147 | else |
| 1148 | tbio = tbio->bi_next = bio; |
| 1149 | } |
| 1150 | |
| 1151 | DEBUG_PSCSI("PSCSI: Calling bio_add_pc_page() i: %d" |
| 1152 | " bio: %p page: %p len: %d off: %d\n", i, bio, |
| 1153 | page, len, off); |
| 1154 | |
| 1155 | rc = bio_add_pc_page(pdv->pdv_sd->request_queue, |
| 1156 | bio, page, bytes, off); |
| 1157 | if (rc != bytes) |
| 1158 | goto fail; |
| 1159 | |
| 1160 | DEBUG_PSCSI("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", |
| 1161 | bio->bi_vcnt, nr_vecs); |
| 1162 | |
| 1163 | if (bio->bi_vcnt > nr_vecs) { |
| 1164 | DEBUG_PSCSI("PSCSI: Reached bio->bi_vcnt max:" |
| 1165 | " %d i: %d bio: %p, allocating another" |
| 1166 | " bio\n", bio->bi_vcnt, i, bio); |
| 1167 | /* |
| 1168 | * Clear the pointer so that another bio will |
| 1169 | * be allocated with pscsi_get_bio() above, the |
| 1170 | * current bio has already been set *tbio and |
| 1171 | * bio->bi_next. |
| 1172 | */ |
| 1173 | bio = NULL; |
| 1174 | } |
| 1175 | |
| 1176 | page++; |
| 1177 | len -= bytes; |
| 1178 | data_len -= bytes; |
| 1179 | off = 0; |
| 1180 | } |
| 1181 | } |
| 1182 | /* |
| 1183 | * Setup the primary pt->pscsi_req used for non BIDI and BIDI-COMMAND |
| 1184 | * primary SCSI WRITE poayload mapped for struct se_task->task_sg[] |
| 1185 | */ |
| 1186 | if (!(bidi_read)) { |
| 1187 | /* |
| 1188 | * Starting with v2.6.31, call blk_make_request() passing in *hbio to |
| 1189 | * allocate the pSCSI task a struct request. |
| 1190 | */ |
| 1191 | pt->pscsi_req = blk_make_request(pdv->pdv_sd->request_queue, |
| 1192 | hbio, GFP_KERNEL); |
| 1193 | if (!(pt->pscsi_req)) { |
| 1194 | printk(KERN_ERR "pSCSI: blk_make_request() failed\n"); |
| 1195 | goto fail; |
| 1196 | } |
| 1197 | /* |
| 1198 | * Setup the newly allocated struct request for REQ_TYPE_BLOCK_PC, |
| 1199 | * and setup rq callback, CDB and sense. |
| 1200 | */ |
| 1201 | pscsi_blk_init_request(task, pt, pt->pscsi_req, 0); |
| 1202 | |
| 1203 | return task->task_sg_num; |
| 1204 | } |
| 1205 | /* |
| 1206 | * Setup the secondary pt->pscsi_req->next_rq used for the extra BIDI-COMMAND |
| 1207 | * SCSI READ paylaod mapped for struct se_task->task_sg_bidi[] |
| 1208 | */ |
| 1209 | pt->pscsi_req->next_rq = blk_make_request(pdv->pdv_sd->request_queue, |
| 1210 | hbio, GFP_KERNEL); |
| 1211 | if (!(pt->pscsi_req->next_rq)) { |
| 1212 | printk(KERN_ERR "pSCSI: blk_make_request() failed for BIDI\n"); |
| 1213 | goto fail; |
| 1214 | } |
| 1215 | pscsi_blk_init_request(task, pt, pt->pscsi_req->next_rq, 1); |
| 1216 | |
| 1217 | return task->task_sg_num; |
| 1218 | fail: |
| 1219 | while (hbio) { |
| 1220 | bio = hbio; |
| 1221 | hbio = hbio->bi_next; |
| 1222 | bio->bi_next = NULL; |
| 1223 | bio_endio(bio, 0); |
| 1224 | } |
| 1225 | return ret; |
| 1226 | } |
| 1227 | |
| 1228 | static int pscsi_map_task_SG(struct se_task *task) |
| 1229 | { |
| 1230 | int ret; |
| 1231 | |
| 1232 | /* |
| 1233 | * Setup the main struct request for the task->task_sg[] payload |
| 1234 | */ |
| 1235 | |
| 1236 | ret = __pscsi_map_task_SG(task, task->task_sg, task->task_sg_num, 0); |
| 1237 | if (ret >= 0 && task->task_sg_bidi) { |
| 1238 | /* |
| 1239 | * If present, set up the extra BIDI-COMMAND SCSI READ |
| 1240 | * struct request and payload. |
| 1241 | */ |
| 1242 | ret = __pscsi_map_task_SG(task, task->task_sg_bidi, |
| 1243 | task->task_sg_num, 1); |
| 1244 | } |
| 1245 | |
| 1246 | if (ret < 0) |
| 1247 | return PYX_TRANSPORT_LU_COMM_FAILURE; |
| 1248 | return 0; |
| 1249 | } |
| 1250 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1251 | static int pscsi_CDB_none(struct se_task *task) |
| 1252 | { |
| 1253 | return pscsi_blk_get_request(task); |
| 1254 | } |
| 1255 | |
| 1256 | /* pscsi_get_cdb(): |
| 1257 | * |
| 1258 | * |
| 1259 | */ |
| 1260 | static unsigned char *pscsi_get_cdb(struct se_task *task) |
| 1261 | { |
| 1262 | struct pscsi_plugin_task *pt = PSCSI_TASK(task); |
| 1263 | |
| 1264 | return pt->pscsi_cdb; |
| 1265 | } |
| 1266 | |
| 1267 | /* pscsi_get_sense_buffer(): |
| 1268 | * |
| 1269 | * |
| 1270 | */ |
| 1271 | static unsigned char *pscsi_get_sense_buffer(struct se_task *task) |
| 1272 | { |
| 1273 | struct pscsi_plugin_task *pt = PSCSI_TASK(task); |
| 1274 | |
| 1275 | return (unsigned char *)&pt->pscsi_sense[0]; |
| 1276 | } |
| 1277 | |
| 1278 | /* pscsi_get_device_rev(): |
| 1279 | * |
| 1280 | * |
| 1281 | */ |
| 1282 | static u32 pscsi_get_device_rev(struct se_device *dev) |
| 1283 | { |
| 1284 | struct pscsi_dev_virt *pdv = dev->dev_ptr; |
| 1285 | struct scsi_device *sd = pdv->pdv_sd; |
| 1286 | |
| 1287 | return (sd->scsi_level - 1) ? sd->scsi_level - 1 : 1; |
| 1288 | } |
| 1289 | |
| 1290 | /* pscsi_get_device_type(): |
| 1291 | * |
| 1292 | * |
| 1293 | */ |
| 1294 | static u32 pscsi_get_device_type(struct se_device *dev) |
| 1295 | { |
| 1296 | struct pscsi_dev_virt *pdv = dev->dev_ptr; |
| 1297 | struct scsi_device *sd = pdv->pdv_sd; |
| 1298 | |
| 1299 | return sd->type; |
| 1300 | } |
| 1301 | |
| 1302 | static sector_t pscsi_get_blocks(struct se_device *dev) |
| 1303 | { |
| 1304 | struct pscsi_dev_virt *pdv = dev->dev_ptr; |
| 1305 | |
| 1306 | if (pdv->pdv_bd && pdv->pdv_bd->bd_part) |
| 1307 | return pdv->pdv_bd->bd_part->nr_sects; |
| 1308 | |
| 1309 | dump_stack(); |
| 1310 | return 0; |
| 1311 | } |
| 1312 | |
| 1313 | /* pscsi_handle_SAM_STATUS_failures(): |
| 1314 | * |
| 1315 | * |
| 1316 | */ |
| 1317 | static inline void pscsi_process_SAM_status( |
| 1318 | struct se_task *task, |
| 1319 | struct pscsi_plugin_task *pt) |
| 1320 | { |
| 1321 | task->task_scsi_status = status_byte(pt->pscsi_result); |
| 1322 | if ((task->task_scsi_status)) { |
| 1323 | task->task_scsi_status <<= 1; |
| 1324 | printk(KERN_INFO "PSCSI Status Byte exception at task: %p CDB:" |
| 1325 | " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0], |
| 1326 | pt->pscsi_result); |
| 1327 | } |
| 1328 | |
| 1329 | switch (host_byte(pt->pscsi_result)) { |
| 1330 | case DID_OK: |
| 1331 | transport_complete_task(task, (!task->task_scsi_status)); |
| 1332 | break; |
| 1333 | default: |
| 1334 | printk(KERN_INFO "PSCSI Host Byte exception at task: %p CDB:" |
| 1335 | " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0], |
| 1336 | pt->pscsi_result); |
| 1337 | task->task_scsi_status = SAM_STAT_CHECK_CONDITION; |
| 1338 | task->task_error_status = PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1339 | task->task_se_cmd->transport_error_status = |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1340 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
| 1341 | transport_complete_task(task, 0); |
| 1342 | break; |
| 1343 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1344 | } |
| 1345 | |
| 1346 | static void pscsi_req_done(struct request *req, int uptodate) |
| 1347 | { |
| 1348 | struct se_task *task = req->end_io_data; |
| 1349 | struct pscsi_plugin_task *pt = PSCSI_TASK(task); |
| 1350 | |
| 1351 | pt->pscsi_result = req->errors; |
| 1352 | pt->pscsi_resid = req->resid_len; |
| 1353 | |
| 1354 | pscsi_process_SAM_status(task, pt); |
| 1355 | /* |
| 1356 | * Release BIDI-READ if present |
| 1357 | */ |
| 1358 | if (req->next_rq != NULL) |
| 1359 | __blk_put_request(req->q, req->next_rq); |
| 1360 | |
| 1361 | __blk_put_request(req->q, req); |
| 1362 | pt->pscsi_req = NULL; |
| 1363 | } |
| 1364 | |
| 1365 | static struct se_subsystem_api pscsi_template = { |
| 1366 | .name = "pscsi", |
| 1367 | .owner = THIS_MODULE, |
| 1368 | .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV, |
| 1369 | .cdb_none = pscsi_CDB_none, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1370 | .map_task_SG = pscsi_map_task_SG, |
| 1371 | .attach_hba = pscsi_attach_hba, |
| 1372 | .detach_hba = pscsi_detach_hba, |
| 1373 | .pmode_enable_hba = pscsi_pmode_enable_hba, |
| 1374 | .allocate_virtdevice = pscsi_allocate_virtdevice, |
| 1375 | .create_virtdevice = pscsi_create_virtdevice, |
| 1376 | .free_device = pscsi_free_device, |
| 1377 | .transport_complete = pscsi_transport_complete, |
| 1378 | .alloc_task = pscsi_alloc_task, |
| 1379 | .do_task = pscsi_do_task, |
| 1380 | .free_task = pscsi_free_task, |
| 1381 | .check_configfs_dev_params = pscsi_check_configfs_dev_params, |
| 1382 | .set_configfs_dev_params = pscsi_set_configfs_dev_params, |
| 1383 | .show_configfs_dev_params = pscsi_show_configfs_dev_params, |
| 1384 | .get_cdb = pscsi_get_cdb, |
| 1385 | .get_sense_buffer = pscsi_get_sense_buffer, |
| 1386 | .get_device_rev = pscsi_get_device_rev, |
| 1387 | .get_device_type = pscsi_get_device_type, |
| 1388 | .get_blocks = pscsi_get_blocks, |
| 1389 | }; |
| 1390 | |
| 1391 | static int __init pscsi_module_init(void) |
| 1392 | { |
| 1393 | return transport_subsystem_register(&pscsi_template); |
| 1394 | } |
| 1395 | |
| 1396 | static void pscsi_module_exit(void) |
| 1397 | { |
| 1398 | transport_subsystem_release(&pscsi_template); |
| 1399 | } |
| 1400 | |
| 1401 | MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); |
| 1402 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
| 1403 | MODULE_LICENSE("GPL"); |
| 1404 | |
| 1405 | module_init(pscsi_module_init); |
| 1406 | module_exit(pscsi_module_exit); |