1 /*
2  *  linux/drivers/scsi/esas2r/esas2r_main.c
3  *      For use with ATTO ExpressSAS R6xx SAS/SATA RAID controllers
4  *
5  *  Copyright (c) 2001-2013 ATTO Technology, Inc.
6  *  (mailto:linuxdrivers@attotech.com)
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * as published by the Free Software Foundation; either version 2
11  * of the License, or (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * NO WARRANTY
19  * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
20  * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
21  * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
22  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
23  * solely responsible for determining the appropriateness of using and
24  * distributing the Program and assumes all risks associated with its
25  * exercise of rights under this Agreement, including but not limited to
26  * the risks and costs of program errors, damage to or loss of data,
27  * programs or equipment, and unavailability or interruption of operations.
28  *
29  * DISCLAIMER OF LIABILITY
30  * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
31  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32  * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
33  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
34  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
35  * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
36  * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
37  *
38  * You should have received a copy of the GNU General Public License
39  * along with this program; if not, write to the Free Software
40  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
41  * USA.
42  */
43 
44 #include "esas2r.h"
45 
46 MODULE_DESCRIPTION(ESAS2R_DRVR_NAME ": " ESAS2R_LONGNAME " driver");
47 MODULE_AUTHOR("ATTO Technology, Inc.");
48 MODULE_LICENSE("GPL");
49 MODULE_VERSION(ESAS2R_VERSION_STR);
50 
51 /* global definitions */
52 
53 static int found_adapters;
54 struct esas2r_adapter *esas2r_adapters[MAX_ADAPTERS];
55 
56 #define ESAS2R_VDA_EVENT_PORT1       54414
57 #define ESAS2R_VDA_EVENT_PORT2       54415
58 #define ESAS2R_VDA_EVENT_SOCK_COUNT  2
59 
60 static struct esas2r_adapter *esas2r_adapter_from_kobj(struct kobject *kobj)
61 {
62 	struct device *dev = container_of(kobj, struct device, kobj);
63 	struct Scsi_Host *host = class_to_shost(dev);
64 
65 	return (struct esas2r_adapter *)host->hostdata;
66 }
67 
68 static ssize_t read_fw(struct file *file, struct kobject *kobj,
69 		       struct bin_attribute *attr,
70 		       char *buf, loff_t off, size_t count)
71 {
72 	struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
73 
74 	return esas2r_read_fw(a, buf, off, count);
75 }
76 
77 static ssize_t write_fw(struct file *file, struct kobject *kobj,
78 			struct bin_attribute *attr,
79 			char *buf, loff_t off, size_t count)
80 {
81 	struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
82 
83 	return esas2r_write_fw(a, buf, off, count);
84 }
85 
86 static ssize_t read_fs(struct file *file, struct kobject *kobj,
87 		       struct bin_attribute *attr,
88 		       char *buf, loff_t off, size_t count)
89 {
90 	struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
91 
92 	return esas2r_read_fs(a, buf, off, count);
93 }
94 
95 static ssize_t write_fs(struct file *file, struct kobject *kobj,
96 			struct bin_attribute *attr,
97 			char *buf, loff_t off, size_t count)
98 {
99 	struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
100 	int length = min(sizeof(struct esas2r_ioctl_fs), count);
101 	int result = 0;
102 
103 	result = esas2r_write_fs(a, buf, off, count);
104 
105 	if (result < 0)
106 		result = 0;
107 
108 	return length;
109 }
110 
111 static ssize_t read_vda(struct file *file, struct kobject *kobj,
112 			struct bin_attribute *attr,
113 			char *buf, loff_t off, size_t count)
114 {
115 	struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
116 
117 	return esas2r_read_vda(a, buf, off, count);
118 }
119 
120 static ssize_t write_vda(struct file *file, struct kobject *kobj,
121 			 struct bin_attribute *attr,
122 			 char *buf, loff_t off, size_t count)
123 {
124 	struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
125 
126 	return esas2r_write_vda(a, buf, off, count);
127 }
128 
129 static ssize_t read_live_nvram(struct file *file, struct kobject *kobj,
130 			       struct bin_attribute *attr,
131 			       char *buf, loff_t off, size_t count)
132 {
133 	struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
134 	int length = min_t(size_t, sizeof(struct esas2r_sas_nvram), PAGE_SIZE);
135 
136 	memcpy(buf, a->nvram, length);
137 	return length;
138 }
139 
140 static ssize_t write_live_nvram(struct file *file, struct kobject *kobj,
141 				struct bin_attribute *attr,
142 				char *buf, loff_t off, size_t count)
143 {
144 	struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
145 	struct esas2r_request *rq;
146 	int result = -EFAULT;
147 
148 	rq = esas2r_alloc_request(a);
149 	if (rq == NULL)
150 		return -ENOMEM;
151 
152 	if (esas2r_write_params(a, rq, (struct esas2r_sas_nvram *)buf))
153 		result = count;
154 
155 	esas2r_free_request(a, rq);
156 
157 	return result;
158 }
159 
160 static ssize_t read_default_nvram(struct file *file, struct kobject *kobj,
161 				  struct bin_attribute *attr,
162 				  char *buf, loff_t off, size_t count)
163 {
164 	struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
165 
166 	esas2r_nvram_get_defaults(a, (struct esas2r_sas_nvram *)buf);
167 
168 	return sizeof(struct esas2r_sas_nvram);
169 }
170 
171 static ssize_t read_hw(struct file *file, struct kobject *kobj,
172 		       struct bin_attribute *attr,
173 		       char *buf, loff_t off, size_t count)
174 {
175 	struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
176 	int length = min_t(size_t, sizeof(struct atto_ioctl), PAGE_SIZE);
177 
178 	if (!a->local_atto_ioctl)
179 		return -ENOMEM;
180 
181 	if (handle_hba_ioctl(a, a->local_atto_ioctl) != IOCTL_SUCCESS)
182 		return -ENOMEM;
183 
184 	memcpy(buf, a->local_atto_ioctl, length);
185 
186 	return length;
187 }
188 
189 static ssize_t write_hw(struct file *file, struct kobject *kobj,
190 			struct bin_attribute *attr,
191 			char *buf, loff_t off, size_t count)
192 {
193 	struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
194 	int length = min(sizeof(struct atto_ioctl), count);
195 
196 	if (!a->local_atto_ioctl) {
197 		a->local_atto_ioctl = kmalloc(sizeof(struct atto_ioctl),
198 					      GFP_KERNEL);
199 		if (a->local_atto_ioctl == NULL) {
200 			esas2r_log(ESAS2R_LOG_WARN,
201 				   "write_hw kzalloc failed for %zu bytes",
202 				   sizeof(struct atto_ioctl));
203 			return -ENOMEM;
204 		}
205 	}
206 
207 	memset(a->local_atto_ioctl, 0, sizeof(struct atto_ioctl));
208 	memcpy(a->local_atto_ioctl, buf, length);
209 
210 	return length;
211 }
212 
213 #define ESAS2R_RW_BIN_ATTR(_name) \
214 	struct bin_attribute bin_attr_ ## _name = { \
215 		.attr	= \
216 		{ .name = __stringify(_name), .mode  = S_IRUSR | S_IWUSR }, \
217 		.size	= 0, \
218 		.read	= read_ ## _name, \
219 		.write	= write_ ## _name }
220 
221 ESAS2R_RW_BIN_ATTR(fw);
222 ESAS2R_RW_BIN_ATTR(fs);
223 ESAS2R_RW_BIN_ATTR(vda);
224 ESAS2R_RW_BIN_ATTR(hw);
225 ESAS2R_RW_BIN_ATTR(live_nvram);
226 
227 struct bin_attribute bin_attr_default_nvram = {
228 	.attr	= { .name = "default_nvram", .mode = S_IRUGO },
229 	.size	= 0,
230 	.read	= read_default_nvram,
231 	.write	= NULL
232 };
233 
234 static struct scsi_host_template driver_template = {
235 	.module				= THIS_MODULE,
236 	.show_info			= esas2r_show_info,
237 	.name				= ESAS2R_LONGNAME,
238 	.info				= esas2r_info,
239 	.ioctl				= esas2r_ioctl,
240 	.queuecommand			= esas2r_queuecommand,
241 	.eh_abort_handler		= esas2r_eh_abort,
242 	.eh_device_reset_handler	= esas2r_device_reset,
243 	.eh_bus_reset_handler		= esas2r_bus_reset,
244 	.eh_host_reset_handler		= esas2r_host_reset,
245 	.eh_target_reset_handler	= esas2r_target_reset,
246 	.can_queue			= 128,
247 	.this_id			= -1,
248 	.sg_tablesize			= SG_CHUNK_SIZE,
249 	.cmd_per_lun			=
250 		ESAS2R_DEFAULT_CMD_PER_LUN,
251 	.present			= 0,
252 	.emulated			= 0,
253 	.proc_name			= ESAS2R_DRVR_NAME,
254 	.change_queue_depth		= scsi_change_queue_depth,
255 	.max_sectors			= 0xFFFF,
256 };
257 
258 int sgl_page_size = 512;
259 module_param(sgl_page_size, int, 0);
260 MODULE_PARM_DESC(sgl_page_size,
261 		 "Scatter/gather list (SGL) page size in number of S/G "
262 		 "entries.  If your application is doing a lot of very large "
263 		 "transfers, you may want to increase the SGL page size.  "
264 		 "Default 512.");
265 
266 int num_sg_lists = 1024;
267 module_param(num_sg_lists, int, 0);
268 MODULE_PARM_DESC(num_sg_lists,
269 		 "Number of scatter/gather lists.  Default 1024.");
270 
271 int sg_tablesize = SG_CHUNK_SIZE;
272 module_param(sg_tablesize, int, 0);
273 MODULE_PARM_DESC(sg_tablesize,
274 		 "Maximum number of entries in a scatter/gather table.");
275 
276 int num_requests = 256;
277 module_param(num_requests, int, 0);
278 MODULE_PARM_DESC(num_requests,
279 		 "Number of requests.  Default 256.");
280 
281 int num_ae_requests = 4;
282 module_param(num_ae_requests, int, 0);
283 MODULE_PARM_DESC(num_ae_requests,
284 		 "Number of VDA asynchronous event requests.  Default 4.");
285 
286 int cmd_per_lun = ESAS2R_DEFAULT_CMD_PER_LUN;
287 module_param(cmd_per_lun, int, 0);
288 MODULE_PARM_DESC(cmd_per_lun,
289 		 "Maximum number of commands per LUN.  Default "
290 		 DEFINED_NUM_TO_STR(ESAS2R_DEFAULT_CMD_PER_LUN) ".");
291 
292 int can_queue = 128;
293 module_param(can_queue, int, 0);
294 MODULE_PARM_DESC(can_queue,
295 		 "Maximum number of commands per adapter.  Default 128.");
296 
297 int esas2r_max_sectors = 0xFFFF;
298 module_param(esas2r_max_sectors, int, 0);
299 MODULE_PARM_DESC(esas2r_max_sectors,
300 		 "Maximum number of disk sectors in a single data transfer.  "
301 		 "Default 65535 (largest possible setting).");
302 
303 int interrupt_mode = 1;
304 module_param(interrupt_mode, int, 0);
305 MODULE_PARM_DESC(interrupt_mode,
306 		 "Defines the interrupt mode to use.  0 for legacy"
307 		 ", 1 for MSI.  Default is MSI (1).");
308 
309 static const struct pci_device_id
310 	esas2r_pci_table[] = {
311 	{ ATTO_VENDOR_ID, 0x0049,	  ATTO_VENDOR_ID, 0x0049,
312 	  0,
313 	  0, 0 },
314 	{ ATTO_VENDOR_ID, 0x0049,	  ATTO_VENDOR_ID, 0x004A,
315 	  0,
316 	  0, 0 },
317 	{ ATTO_VENDOR_ID, 0x0049,	  ATTO_VENDOR_ID, 0x004B,
318 	  0,
319 	  0, 0 },
320 	{ ATTO_VENDOR_ID, 0x0049,	  ATTO_VENDOR_ID, 0x004C,
321 	  0,
322 	  0, 0 },
323 	{ ATTO_VENDOR_ID, 0x0049,	  ATTO_VENDOR_ID, 0x004D,
324 	  0,
325 	  0, 0 },
326 	{ ATTO_VENDOR_ID, 0x0049,	  ATTO_VENDOR_ID, 0x004E,
327 	  0,
328 	  0, 0 },
329 	{ 0,		  0,		  0,		  0,
330 	  0,
331 	  0, 0 }
332 };
333 
334 MODULE_DEVICE_TABLE(pci, esas2r_pci_table);
335 
336 static int
337 esas2r_probe(struct pci_dev *pcid, const struct pci_device_id *id);
338 
339 static void
340 esas2r_remove(struct pci_dev *pcid);
341 
342 static struct pci_driver
343 	esas2r_pci_driver = {
344 	.name		= ESAS2R_DRVR_NAME,
345 	.id_table	= esas2r_pci_table,
346 	.probe		= esas2r_probe,
347 	.remove		= esas2r_remove,
348 	.driver.pm	= &esas2r_pm_ops,
349 };
350 
351 static int esas2r_probe(struct pci_dev *pcid,
352 			const struct pci_device_id *id)
353 {
354 	struct Scsi_Host *host = NULL;
355 	struct esas2r_adapter *a;
356 	int err;
357 
358 	size_t host_alloc_size = sizeof(struct esas2r_adapter)
359 				 + ((num_requests) +
360 				    1) * sizeof(struct esas2r_request);
361 
362 	esas2r_log_dev(ESAS2R_LOG_DEBG, &(pcid->dev),
363 		       "esas2r_probe() 0x%02x 0x%02x 0x%02x 0x%02x",
364 		       pcid->vendor,
365 		       pcid->device,
366 		       pcid->subsystem_vendor,
367 		       pcid->subsystem_device);
368 
369 	esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
370 		       "before pci_enable_device() "
371 		       "enable_cnt: %d",
372 		       pcid->enable_cnt.counter);
373 
374 	err = pci_enable_device(pcid);
375 	if (err != 0) {
376 		esas2r_log_dev(ESAS2R_LOG_CRIT, &(pcid->dev),
377 			       "pci_enable_device() FAIL (%d)",
378 			       err);
379 		return -ENODEV;
380 	}
381 
382 	esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
383 		       "pci_enable_device() OK");
384 	esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
385 		       "after pci_enable_device() enable_cnt: %d",
386 		       pcid->enable_cnt.counter);
387 
388 	host = scsi_host_alloc(&driver_template, host_alloc_size);
389 	if (host == NULL) {
390 		esas2r_log(ESAS2R_LOG_CRIT, "scsi_host_alloc() FAIL");
391 		return -ENODEV;
392 	}
393 
394 	memset(host->hostdata, 0, host_alloc_size);
395 
396 	a = (struct esas2r_adapter *)host->hostdata;
397 
398 	esas2r_log(ESAS2R_LOG_INFO, "scsi_host_alloc() OK host: %p", host);
399 
400 	/* override max LUN and max target id */
401 
402 	host->max_id = ESAS2R_MAX_ID + 1;
403 	host->max_lun = 255;
404 
405 	/* we can handle 16-byte CDbs */
406 
407 	host->max_cmd_len = 16;
408 
409 	host->can_queue = can_queue;
410 	host->cmd_per_lun = cmd_per_lun;
411 	host->this_id = host->max_id + 1;
412 	host->max_channel = 0;
413 	host->unique_id = found_adapters;
414 	host->sg_tablesize = sg_tablesize;
415 	host->max_sectors = esas2r_max_sectors;
416 
417 	/* set to bus master for BIOses that don't do it for us */
418 
419 	esas2r_log(ESAS2R_LOG_INFO, "pci_set_master() called");
420 
421 	pci_set_master(pcid);
422 
423 	if (!esas2r_init_adapter(host, pcid, found_adapters)) {
424 		esas2r_log(ESAS2R_LOG_CRIT,
425 			   "unable to initialize device at PCI bus %x:%x",
426 			   pcid->bus->number,
427 			   pcid->devfn);
428 
429 		esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
430 			       "scsi_host_put() called");
431 
432 		scsi_host_put(host);
433 
434 		return 0;
435 
436 	}
437 
438 	esas2r_log(ESAS2R_LOG_INFO, "pci_set_drvdata(%p, %p) called", pcid,
439 		   host->hostdata);
440 
441 	pci_set_drvdata(pcid, host);
442 
443 	esas2r_log(ESAS2R_LOG_INFO, "scsi_add_host() called");
444 
445 	err = scsi_add_host(host, &pcid->dev);
446 
447 	if (err) {
448 		esas2r_log(ESAS2R_LOG_CRIT, "scsi_add_host returned %d", err);
449 		esas2r_log_dev(ESAS2R_LOG_CRIT, &(host->shost_gendev),
450 			       "scsi_add_host() FAIL");
451 
452 		esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
453 			       "scsi_host_put() called");
454 
455 		scsi_host_put(host);
456 
457 		esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
458 			       "pci_set_drvdata(%p, NULL) called",
459 			       pcid);
460 
461 		pci_set_drvdata(pcid, NULL);
462 
463 		return -ENODEV;
464 	}
465 
466 
467 	esas2r_fw_event_on(a);
468 
469 	esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
470 		       "scsi_scan_host() called");
471 
472 	scsi_scan_host(host);
473 
474 	/* Add sysfs binary files */
475 	if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fw))
476 		esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
477 			       "Failed to create sysfs binary file: fw");
478 	else
479 		a->sysfs_fw_created = 1;
480 
481 	if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fs))
482 		esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
483 			       "Failed to create sysfs binary file: fs");
484 	else
485 		a->sysfs_fs_created = 1;
486 
487 	if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_vda))
488 		esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
489 			       "Failed to create sysfs binary file: vda");
490 	else
491 		a->sysfs_vda_created = 1;
492 
493 	if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_hw))
494 		esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
495 			       "Failed to create sysfs binary file: hw");
496 	else
497 		a->sysfs_hw_created = 1;
498 
499 	if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_live_nvram))
500 		esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
501 			       "Failed to create sysfs binary file: live_nvram");
502 	else
503 		a->sysfs_live_nvram_created = 1;
504 
505 	if (sysfs_create_bin_file(&host->shost_dev.kobj,
506 				  &bin_attr_default_nvram))
507 		esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
508 			       "Failed to create sysfs binary file: default_nvram");
509 	else
510 		a->sysfs_default_nvram_created = 1;
511 
512 	found_adapters++;
513 
514 	return 0;
515 }
516 
517 static void esas2r_remove(struct pci_dev *pdev)
518 {
519 	struct Scsi_Host *host = pci_get_drvdata(pdev);
520 	struct esas2r_adapter *a = (struct esas2r_adapter *)host->hostdata;
521 
522 	esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
523 		       "esas2r_remove(%p) called; "
524 		       "host:%p", pdev,
525 		       host);
526 
527 	esas2r_kill_adapter(a->index);
528 	found_adapters--;
529 }
530 
531 static int __init esas2r_init(void)
532 {
533 	int i;
534 
535 	esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
536 
537 	/* verify valid parameters */
538 
539 	if (can_queue < 1) {
540 		esas2r_log(ESAS2R_LOG_WARN,
541 			   "warning: can_queue must be at least 1, value "
542 			   "forced.");
543 		can_queue = 1;
544 	} else if (can_queue > 2048) {
545 		esas2r_log(ESAS2R_LOG_WARN,
546 			   "warning: can_queue must be no larger than 2048, "
547 			   "value forced.");
548 		can_queue = 2048;
549 	}
550 
551 	if (cmd_per_lun < 1) {
552 		esas2r_log(ESAS2R_LOG_WARN,
553 			   "warning: cmd_per_lun must be at least 1, value "
554 			   "forced.");
555 		cmd_per_lun = 1;
556 	} else if (cmd_per_lun > 2048) {
557 		esas2r_log(ESAS2R_LOG_WARN,
558 			   "warning: cmd_per_lun must be no larger than "
559 			   "2048, value forced.");
560 		cmd_per_lun = 2048;
561 	}
562 
563 	if (sg_tablesize < 32) {
564 		esas2r_log(ESAS2R_LOG_WARN,
565 			   "warning: sg_tablesize must be at least 32, "
566 			   "value forced.");
567 		sg_tablesize = 32;
568 	}
569 
570 	if (esas2r_max_sectors < 1) {
571 		esas2r_log(ESAS2R_LOG_WARN,
572 			   "warning: esas2r_max_sectors must be at least "
573 			   "1, value forced.");
574 		esas2r_max_sectors = 1;
575 	} else if (esas2r_max_sectors > 0xffff) {
576 		esas2r_log(ESAS2R_LOG_WARN,
577 			   "warning: esas2r_max_sectors must be no larger "
578 			   "than 0xffff, value forced.");
579 		esas2r_max_sectors = 0xffff;
580 	}
581 
582 	sgl_page_size &= ~(ESAS2R_SGL_ALIGN - 1);
583 
584 	if (sgl_page_size < SGL_PG_SZ_MIN)
585 		sgl_page_size = SGL_PG_SZ_MIN;
586 	else if (sgl_page_size > SGL_PG_SZ_MAX)
587 		sgl_page_size = SGL_PG_SZ_MAX;
588 
589 	if (num_sg_lists < NUM_SGL_MIN)
590 		num_sg_lists = NUM_SGL_MIN;
591 	else if (num_sg_lists > NUM_SGL_MAX)
592 		num_sg_lists = NUM_SGL_MAX;
593 
594 	if (num_requests < NUM_REQ_MIN)
595 		num_requests = NUM_REQ_MIN;
596 	else if (num_requests > NUM_REQ_MAX)
597 		num_requests = NUM_REQ_MAX;
598 
599 	if (num_ae_requests < NUM_AE_MIN)
600 		num_ae_requests = NUM_AE_MIN;
601 	else if (num_ae_requests > NUM_AE_MAX)
602 		num_ae_requests = NUM_AE_MAX;
603 
604 	/* set up other globals */
605 
606 	for (i = 0; i < MAX_ADAPTERS; i++)
607 		esas2r_adapters[i] = NULL;
608 
609 	return pci_register_driver(&esas2r_pci_driver);
610 }
611 
612 /* Handle ioctl calls to "/proc/scsi/esas2r/ATTOnode" */
613 static const struct file_operations esas2r_proc_fops = {
614 	.compat_ioctl	= compat_ptr_ioctl,
615 	.unlocked_ioctl = esas2r_proc_ioctl,
616 };
617 
618 static const struct proc_ops esas2r_proc_ops = {
619 	.proc_lseek		= default_llseek,
620 	.proc_ioctl		= esas2r_proc_ioctl,
621 #ifdef CONFIG_COMPAT
622 	.proc_compat_ioctl	= compat_ptr_ioctl,
623 #endif
624 };
625 
626 static struct Scsi_Host *esas2r_proc_host;
627 static int esas2r_proc_major;
628 
629 long esas2r_proc_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
630 {
631 	return esas2r_ioctl_handler(esas2r_proc_host->hostdata,
632 				    cmd, (void __user *)arg);
633 }
634 
635 static void __exit esas2r_exit(void)
636 {
637 	esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
638 
639 	if (esas2r_proc_major > 0) {
640 		esas2r_log(ESAS2R_LOG_INFO, "unregister proc");
641 
642 		remove_proc_entry(ATTONODE_NAME,
643 				  esas2r_proc_host->hostt->proc_dir);
644 		unregister_chrdev(esas2r_proc_major, ESAS2R_DRVR_NAME);
645 
646 		esas2r_proc_major = 0;
647 	}
648 
649 	esas2r_log(ESAS2R_LOG_INFO, "pci_unregister_driver() called");
650 
651 	pci_unregister_driver(&esas2r_pci_driver);
652 }
653 
654 int esas2r_show_info(struct seq_file *m, struct Scsi_Host *sh)
655 {
656 	struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
657 
658 	struct esas2r_target *t;
659 	int dev_count = 0;
660 
661 	esas2r_log(ESAS2R_LOG_DEBG, "esas2r_show_info (%p,%d)", m, sh->host_no);
662 
663 	seq_printf(m, ESAS2R_LONGNAME "\n"
664 		   "Driver version: "ESAS2R_VERSION_STR "\n"
665 		   "Flash version: %s\n"
666 		   "Firmware version: %s\n"
667 		   "Copyright "ESAS2R_COPYRIGHT_YEARS "\n"
668 		   "http://www.attotech.com\n"
669 		   "\n",
670 		   a->flash_rev,
671 		   a->fw_rev[0] ? a->fw_rev : "(none)");
672 
673 
674 	seq_printf(m, "Adapter information:\n"
675 		   "--------------------\n"
676 		   "Model: %s\n"
677 		   "SAS address: %02X%02X%02X%02X:%02X%02X%02X%02X\n",
678 		   esas2r_get_model_name(a),
679 		   a->nvram->sas_addr[0],
680 		   a->nvram->sas_addr[1],
681 		   a->nvram->sas_addr[2],
682 		   a->nvram->sas_addr[3],
683 		   a->nvram->sas_addr[4],
684 		   a->nvram->sas_addr[5],
685 		   a->nvram->sas_addr[6],
686 		   a->nvram->sas_addr[7]);
687 
688 	seq_puts(m, "\n"
689 		   "Discovered devices:\n"
690 		   "\n"
691 		   "   #  Target ID\n"
692 		   "---------------\n");
693 
694 	for (t = a->targetdb; t < a->targetdb_end; t++)
695 		if (t->buffered_target_state == TS_PRESENT) {
696 			seq_printf(m, " %3d   %3d\n",
697 				   ++dev_count,
698 				   (u16)(uintptr_t)(t - a->targetdb));
699 		}
700 
701 	if (dev_count == 0)
702 		seq_puts(m, "none\n");
703 
704 	seq_putc(m, '\n');
705 	return 0;
706 
707 }
708 
709 const char *esas2r_info(struct Scsi_Host *sh)
710 {
711 	struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
712 	static char esas2r_info_str[512];
713 
714 	esas2r_log_dev(ESAS2R_LOG_INFO, &(sh->shost_gendev),
715 		       "esas2r_info() called");
716 
717 	/*
718 	 * if we haven't done so already, register as a char driver
719 	 * and stick a node under "/proc/scsi/esas2r/ATTOnode"
720 	 */
721 
722 	if (esas2r_proc_major <= 0) {
723 		esas2r_proc_host = sh;
724 
725 		esas2r_proc_major = register_chrdev(0, ESAS2R_DRVR_NAME,
726 						    &esas2r_proc_fops);
727 
728 		esas2r_log_dev(ESAS2R_LOG_DEBG, &(sh->shost_gendev),
729 			       "register_chrdev (major %d)",
730 			       esas2r_proc_major);
731 
732 		if (esas2r_proc_major > 0) {
733 			struct proc_dir_entry *pde;
734 
735 			pde = proc_create(ATTONODE_NAME, 0,
736 					  sh->hostt->proc_dir,
737 					  &esas2r_proc_ops);
738 
739 			if (!pde) {
740 				esas2r_log_dev(ESAS2R_LOG_WARN,
741 					       &(sh->shost_gendev),
742 					       "failed to create_proc_entry");
743 				esas2r_proc_major = -1;
744 			}
745 		}
746 	}
747 
748 	sprintf(esas2r_info_str,
749 		ESAS2R_LONGNAME " (bus 0x%02X, device 0x%02X, IRQ 0x%02X)"
750 		" driver version: "ESAS2R_VERSION_STR "  firmware version: "
751 		"%s\n",
752 		a->pcid->bus->number, a->pcid->devfn, a->pcid->irq,
753 		a->fw_rev[0] ? a->fw_rev : "(none)");
754 
755 	return esas2r_info_str;
756 }
757 
758 /* Callback for building a request scatter/gather list */
759 static u32 get_physaddr_from_sgc(struct esas2r_sg_context *sgc, u64 *addr)
760 {
761 	u32 len;
762 
763 	if (likely(sgc->cur_offset == sgc->exp_offset)) {
764 		/*
765 		 * the normal case: caller used all bytes from previous call, so
766 		 * expected offset is the same as the current offset.
767 		 */
768 
769 		if (sgc->sgel_count < sgc->num_sgel) {
770 			/* retrieve next segment, except for first time */
771 			if (sgc->exp_offset > (u8 *)0) {
772 				/* advance current segment */
773 				sgc->cur_sgel = sg_next(sgc->cur_sgel);
774 				++(sgc->sgel_count);
775 			}
776 
777 
778 			len = sg_dma_len(sgc->cur_sgel);
779 			(*addr) = sg_dma_address(sgc->cur_sgel);
780 
781 			/* save the total # bytes returned to caller so far */
782 			sgc->exp_offset += len;
783 
784 		} else {
785 			len = 0;
786 		}
787 	} else if (sgc->cur_offset < sgc->exp_offset) {
788 		/*
789 		 * caller did not use all bytes from previous call. need to
790 		 * compute the address based on current segment.
791 		 */
792 
793 		len = sg_dma_len(sgc->cur_sgel);
794 		(*addr) = sg_dma_address(sgc->cur_sgel);
795 
796 		sgc->exp_offset -= len;
797 
798 		/* calculate PA based on prev segment address and offsets */
799 		*addr = *addr +
800 			(sgc->cur_offset - sgc->exp_offset);
801 
802 		sgc->exp_offset += len;
803 
804 		/* re-calculate length based on offset */
805 		len = lower_32_bits(
806 			sgc->exp_offset - sgc->cur_offset);
807 	} else {   /* if ( sgc->cur_offset > sgc->exp_offset ) */
808 		   /*
809 		    * we don't expect the caller to skip ahead.
810 		    * cur_offset will never exceed the len we return
811 		    */
812 		len = 0;
813 	}
814 
815 	return len;
816 }
817 
818 int esas2r_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
819 {
820 	struct esas2r_adapter *a =
821 		(struct esas2r_adapter *)cmd->device->host->hostdata;
822 	struct esas2r_request *rq;
823 	struct esas2r_sg_context sgc;
824 	unsigned bufflen;
825 
826 	/* Assume success, if it fails we will fix the result later. */
827 	cmd->result = DID_OK << 16;
828 
829 	if (unlikely(test_bit(AF_DEGRADED_MODE, &a->flags))) {
830 		cmd->result = DID_NO_CONNECT << 16;
831 		cmd->scsi_done(cmd);
832 		return 0;
833 	}
834 
835 	rq = esas2r_alloc_request(a);
836 	if (unlikely(rq == NULL)) {
837 		esas2r_debug("esas2r_alloc_request failed");
838 		return SCSI_MLQUEUE_HOST_BUSY;
839 	}
840 
841 	rq->cmd = cmd;
842 	bufflen = scsi_bufflen(cmd);
843 
844 	if (likely(bufflen != 0)) {
845 		if (cmd->sc_data_direction == DMA_TO_DEVICE)
846 			rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_WRD);
847 		else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
848 			rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_RDD);
849 	}
850 
851 	memcpy(rq->vrq->scsi.cdb, cmd->cmnd, cmd->cmd_len);
852 	rq->vrq->scsi.length = cpu_to_le32(bufflen);
853 	rq->target_id = cmd->device->id;
854 	rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
855 	rq->sense_buf = cmd->sense_buffer;
856 	rq->sense_len = SCSI_SENSE_BUFFERSIZE;
857 
858 	esas2r_sgc_init(&sgc, a, rq, NULL);
859 
860 	sgc.length = bufflen;
861 	sgc.cur_offset = NULL;
862 
863 	sgc.cur_sgel = scsi_sglist(cmd);
864 	sgc.exp_offset = NULL;
865 	sgc.num_sgel = scsi_dma_map(cmd);
866 	sgc.sgel_count = 0;
867 
868 	if (unlikely(sgc.num_sgel < 0)) {
869 		esas2r_free_request(a, rq);
870 		return SCSI_MLQUEUE_HOST_BUSY;
871 	}
872 
873 	sgc.get_phys_addr = (PGETPHYSADDR)get_physaddr_from_sgc;
874 
875 	if (unlikely(!esas2r_build_sg_list(a, rq, &sgc))) {
876 		scsi_dma_unmap(cmd);
877 		esas2r_free_request(a, rq);
878 		return SCSI_MLQUEUE_HOST_BUSY;
879 	}
880 
881 	esas2r_debug("start request %p to %d:%d\n", rq, (int)cmd->device->id,
882 		     (int)cmd->device->lun);
883 
884 	esas2r_start_request(a, rq);
885 
886 	return 0;
887 }
888 
889 static void complete_task_management_request(struct esas2r_adapter *a,
890 					     struct esas2r_request *rq)
891 {
892 	(*rq->task_management_status_ptr) = rq->req_stat;
893 	esas2r_free_request(a, rq);
894 }
895 
896 /*
897  * Searches the specified queue for the specified queue for the command
898  * to abort.
899  *
900  * Return 0 on failure, 1 if command was not found, 2 if command was found
901  */
902 static int esas2r_check_active_queue(struct esas2r_adapter *a,
903 				     struct esas2r_request **abort_request,
904 				     struct scsi_cmnd *cmd,
905 				     struct list_head *queue)
906 {
907 	bool found = false;
908 	struct esas2r_request *ar = *abort_request;
909 	struct esas2r_request *rq;
910 	struct list_head *element, *next;
911 
912 	list_for_each_safe(element, next, queue) {
913 
914 		rq = list_entry(element, struct esas2r_request, req_list);
915 
916 		if (rq->cmd == cmd) {
917 
918 			/* Found the request.  See what to do with it. */
919 			if (queue == &a->active_list) {
920 				/*
921 				 * We are searching the active queue, which
922 				 * means that we need to send an abort request
923 				 * to the firmware.
924 				 */
925 				ar = esas2r_alloc_request(a);
926 				if (ar == NULL) {
927 					esas2r_log_dev(ESAS2R_LOG_WARN,
928 						       &(a->host->shost_gendev),
929 						       "unable to allocate an abort request for cmd %p",
930 						       cmd);
931 					return 0; /* Failure */
932 				}
933 
934 				/*
935 				 * Task management request must be formatted
936 				 * with a lock held.
937 				 */
938 				ar->sense_len = 0;
939 				ar->vrq->scsi.length = 0;
940 				ar->target_id = rq->target_id;
941 				ar->vrq->scsi.flags |= cpu_to_le32(
942 					(u8)le32_to_cpu(rq->vrq->scsi.flags));
943 
944 				memset(ar->vrq->scsi.cdb, 0,
945 				       sizeof(ar->vrq->scsi.cdb));
946 
947 				ar->vrq->scsi.flags |= cpu_to_le32(
948 					FCP_CMND_TRM);
949 				ar->vrq->scsi.u.abort_handle =
950 					rq->vrq->scsi.handle;
951 			} else {
952 				/*
953 				 * The request is pending but not active on
954 				 * the firmware.  Just free it now and we'll
955 				 * report the successful abort below.
956 				 */
957 				list_del_init(&rq->req_list);
958 				esas2r_free_request(a, rq);
959 			}
960 
961 			found = true;
962 			break;
963 		}
964 
965 	}
966 
967 	if (!found)
968 		return 1;       /* Not found */
969 
970 	return 2;               /* found */
971 
972 
973 }
974 
975 int esas2r_eh_abort(struct scsi_cmnd *cmd)
976 {
977 	struct esas2r_adapter *a =
978 		(struct esas2r_adapter *)cmd->device->host->hostdata;
979 	struct esas2r_request *abort_request = NULL;
980 	unsigned long flags;
981 	struct list_head *queue;
982 	int result;
983 
984 	esas2r_log(ESAS2R_LOG_INFO, "eh_abort (%p)", cmd);
985 
986 	if (test_bit(AF_DEGRADED_MODE, &a->flags)) {
987 		cmd->result = DID_ABORT << 16;
988 
989 		scsi_set_resid(cmd, 0);
990 
991 		cmd->scsi_done(cmd);
992 
993 		return SUCCESS;
994 	}
995 
996 	spin_lock_irqsave(&a->queue_lock, flags);
997 
998 	/*
999 	 * Run through the defer and active queues looking for the request
1000 	 * to abort.
1001 	 */
1002 
1003 	queue = &a->defer_list;
1004 
1005 check_active_queue:
1006 
1007 	result = esas2r_check_active_queue(a, &abort_request, cmd, queue);
1008 
1009 	if (!result) {
1010 		spin_unlock_irqrestore(&a->queue_lock, flags);
1011 		return FAILED;
1012 	} else if (result == 2 && (queue == &a->defer_list)) {
1013 		queue = &a->active_list;
1014 		goto check_active_queue;
1015 	}
1016 
1017 	spin_unlock_irqrestore(&a->queue_lock, flags);
1018 
1019 	if (abort_request) {
1020 		u8 task_management_status = RS_PENDING;
1021 
1022 		/*
1023 		 * the request is already active, so we need to tell
1024 		 * the firmware to abort it and wait for the response.
1025 		 */
1026 
1027 		abort_request->comp_cb = complete_task_management_request;
1028 		abort_request->task_management_status_ptr =
1029 			&task_management_status;
1030 
1031 		esas2r_start_request(a, abort_request);
1032 
1033 		if (atomic_read(&a->disable_cnt) == 0)
1034 			esas2r_do_deferred_processes(a);
1035 
1036 		while (task_management_status == RS_PENDING)
1037 			msleep(10);
1038 
1039 		/*
1040 		 * Once we get here, the original request will have been
1041 		 * completed by the firmware and the abort request will have
1042 		 * been cleaned up.  we're done!
1043 		 */
1044 
1045 		return SUCCESS;
1046 	}
1047 
1048 	/*
1049 	 * If we get here, either we found the inactive request and
1050 	 * freed it, or we didn't find it at all.  Either way, success!
1051 	 */
1052 
1053 	cmd->result = DID_ABORT << 16;
1054 
1055 	scsi_set_resid(cmd, 0);
1056 
1057 	cmd->scsi_done(cmd);
1058 
1059 	return SUCCESS;
1060 }
1061 
1062 static int esas2r_host_bus_reset(struct scsi_cmnd *cmd, bool host_reset)
1063 {
1064 	struct esas2r_adapter *a =
1065 		(struct esas2r_adapter *)cmd->device->host->hostdata;
1066 
1067 	if (test_bit(AF_DEGRADED_MODE, &a->flags))
1068 		return FAILED;
1069 
1070 	if (host_reset)
1071 		esas2r_reset_adapter(a);
1072 	else
1073 		esas2r_reset_bus(a);
1074 
1075 	/* above call sets the AF_OS_RESET flag.  wait for it to clear. */
1076 
1077 	while (test_bit(AF_OS_RESET, &a->flags)) {
1078 		msleep(10);
1079 
1080 		if (test_bit(AF_DEGRADED_MODE, &a->flags))
1081 			return FAILED;
1082 	}
1083 
1084 	if (test_bit(AF_DEGRADED_MODE, &a->flags))
1085 		return FAILED;
1086 
1087 	return SUCCESS;
1088 }
1089 
1090 int esas2r_host_reset(struct scsi_cmnd *cmd)
1091 {
1092 	esas2r_log(ESAS2R_LOG_INFO, "host_reset (%p)", cmd);
1093 
1094 	return esas2r_host_bus_reset(cmd, true);
1095 }
1096 
1097 int esas2r_bus_reset(struct scsi_cmnd *cmd)
1098 {
1099 	esas2r_log(ESAS2R_LOG_INFO, "bus_reset (%p)", cmd);
1100 
1101 	return esas2r_host_bus_reset(cmd, false);
1102 }
1103 
1104 static int esas2r_dev_targ_reset(struct scsi_cmnd *cmd, bool target_reset)
1105 {
1106 	struct esas2r_adapter *a =
1107 		(struct esas2r_adapter *)cmd->device->host->hostdata;
1108 	struct esas2r_request *rq;
1109 	u8 task_management_status = RS_PENDING;
1110 	bool completed;
1111 
1112 	if (test_bit(AF_DEGRADED_MODE, &a->flags))
1113 		return FAILED;
1114 
1115 retry:
1116 	rq = esas2r_alloc_request(a);
1117 	if (rq == NULL) {
1118 		if (target_reset) {
1119 			esas2r_log(ESAS2R_LOG_CRIT,
1120 				   "unable to allocate a request for a "
1121 				   "target reset (%d)!",
1122 				   cmd->device->id);
1123 		} else {
1124 			esas2r_log(ESAS2R_LOG_CRIT,
1125 				   "unable to allocate a request for a "
1126 				   "device reset (%d:%llu)!",
1127 				   cmd->device->id,
1128 				   cmd->device->lun);
1129 		}
1130 
1131 
1132 		return FAILED;
1133 	}
1134 
1135 	rq->target_id = cmd->device->id;
1136 	rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
1137 	rq->req_stat = RS_PENDING;
1138 
1139 	rq->comp_cb = complete_task_management_request;
1140 	rq->task_management_status_ptr = &task_management_status;
1141 
1142 	if (target_reset) {
1143 		esas2r_debug("issuing target reset (%p) to id %d", rq,
1144 			     cmd->device->id);
1145 		completed = esas2r_send_task_mgmt(a, rq, 0x20);
1146 	} else {
1147 		esas2r_debug("issuing device reset (%p) to id %d lun %d", rq,
1148 			     cmd->device->id, cmd->device->lun);
1149 		completed = esas2r_send_task_mgmt(a, rq, 0x10);
1150 	}
1151 
1152 	if (completed) {
1153 		/* Task management cmd completed right away, need to free it. */
1154 
1155 		esas2r_free_request(a, rq);
1156 	} else {
1157 		/*
1158 		 * Wait for firmware to complete the request.  Completion
1159 		 * callback will free it.
1160 		 */
1161 		while (task_management_status == RS_PENDING)
1162 			msleep(10);
1163 	}
1164 
1165 	if (test_bit(AF_DEGRADED_MODE, &a->flags))
1166 		return FAILED;
1167 
1168 	if (task_management_status == RS_BUSY) {
1169 		/*
1170 		 * Busy, probably because we are flashing.  Wait a bit and
1171 		 * try again.
1172 		 */
1173 		msleep(100);
1174 		goto retry;
1175 	}
1176 
1177 	return SUCCESS;
1178 }
1179 
1180 int esas2r_device_reset(struct scsi_cmnd *cmd)
1181 {
1182 	esas2r_log(ESAS2R_LOG_INFO, "device_reset (%p)", cmd);
1183 
1184 	return esas2r_dev_targ_reset(cmd, false);
1185 
1186 }
1187 
1188 int esas2r_target_reset(struct scsi_cmnd *cmd)
1189 {
1190 	esas2r_log(ESAS2R_LOG_INFO, "target_reset (%p)", cmd);
1191 
1192 	return esas2r_dev_targ_reset(cmd, true);
1193 }
1194 
1195 void esas2r_log_request_failure(struct esas2r_adapter *a,
1196 				struct esas2r_request *rq)
1197 {
1198 	u8 reqstatus = rq->req_stat;
1199 
1200 	if (reqstatus == RS_SUCCESS)
1201 		return;
1202 
1203 	if (rq->vrq->scsi.function == VDA_FUNC_SCSI) {
1204 		if (reqstatus == RS_SCSI_ERROR) {
1205 			if (rq->func_rsp.scsi_rsp.sense_len >= 13) {
1206 				esas2r_log(ESAS2R_LOG_WARN,
1207 					   "request failure - SCSI error %x ASC:%x ASCQ:%x CDB:%x",
1208 					   rq->sense_buf[2], rq->sense_buf[12],
1209 					   rq->sense_buf[13],
1210 					   rq->vrq->scsi.cdb[0]);
1211 			} else {
1212 				esas2r_log(ESAS2R_LOG_WARN,
1213 					   "request failure - SCSI error CDB:%x\n",
1214 					   rq->vrq->scsi.cdb[0]);
1215 			}
1216 		} else if ((rq->vrq->scsi.cdb[0] != INQUIRY
1217 			    && rq->vrq->scsi.cdb[0] != REPORT_LUNS)
1218 			   || (reqstatus != RS_SEL
1219 			       && reqstatus != RS_SEL2)) {
1220 			if ((reqstatus == RS_UNDERRUN) &&
1221 			    (rq->vrq->scsi.cdb[0] == INQUIRY)) {
1222 				/* Don't log inquiry underruns */
1223 			} else {
1224 				esas2r_log(ESAS2R_LOG_WARN,
1225 					   "request failure - cdb:%x reqstatus:%d target:%d",
1226 					   rq->vrq->scsi.cdb[0], reqstatus,
1227 					   rq->target_id);
1228 			}
1229 		}
1230 	}
1231 }
1232 
1233 void esas2r_wait_request(struct esas2r_adapter *a, struct esas2r_request *rq)
1234 {
1235 	u32 starttime;
1236 	u32 timeout;
1237 
1238 	starttime = jiffies_to_msecs(jiffies);
1239 	timeout = rq->timeout ? rq->timeout : 5000;
1240 
1241 	while (true) {
1242 		esas2r_polled_interrupt(a);
1243 
1244 		if (rq->req_stat != RS_STARTED)
1245 			break;
1246 
1247 		schedule_timeout_interruptible(msecs_to_jiffies(100));
1248 
1249 		if ((jiffies_to_msecs(jiffies) - starttime) > timeout) {
1250 			esas2r_hdebug("request TMO");
1251 			esas2r_bugon();
1252 
1253 			rq->req_stat = RS_TIMEOUT;
1254 
1255 			esas2r_local_reset_adapter(a);
1256 			return;
1257 		}
1258 	}
1259 }
1260 
1261 u32 esas2r_map_data_window(struct esas2r_adapter *a, u32 addr_lo)
1262 {
1263 	u32 offset = addr_lo & (MW_DATA_WINDOW_SIZE - 1);
1264 	u32 base = addr_lo & -(signed int)MW_DATA_WINDOW_SIZE;
1265 
1266 	if (a->window_base != base) {
1267 		esas2r_write_register_dword(a, MVR_PCI_WIN1_REMAP,
1268 					    base | MVRPW1R_ENABLE);
1269 		esas2r_flush_register_dword(a, MVR_PCI_WIN1_REMAP);
1270 		a->window_base = base;
1271 	}
1272 
1273 	return offset;
1274 }
1275 
1276 /* Read a block of data from chip memory */
1277 bool esas2r_read_mem_block(struct esas2r_adapter *a,
1278 			   void *to,
1279 			   u32 from,
1280 			   u32 size)
1281 {
1282 	u8 *end = (u8 *)to;
1283 
1284 	while (size) {
1285 		u32 len;
1286 		u32 offset;
1287 		u32 iatvr;
1288 
1289 		iatvr = (from & -(signed int)MW_DATA_WINDOW_SIZE);
1290 
1291 		esas2r_map_data_window(a, iatvr);
1292 
1293 		offset = from & (MW_DATA_WINDOW_SIZE - 1);
1294 		len = size;
1295 
1296 		if (len > MW_DATA_WINDOW_SIZE - offset)
1297 			len = MW_DATA_WINDOW_SIZE - offset;
1298 
1299 		from += len;
1300 		size -= len;
1301 
1302 		while (len--) {
1303 			*end++ = esas2r_read_data_byte(a, offset);
1304 			offset++;
1305 		}
1306 	}
1307 
1308 	return true;
1309 }
1310 
1311 void esas2r_nuxi_mgt_data(u8 function, void *data)
1312 {
1313 	struct atto_vda_grp_info *g;
1314 	struct atto_vda_devinfo *d;
1315 	struct atto_vdapart_info *p;
1316 	struct atto_vda_dh_info *h;
1317 	struct atto_vda_metrics_info *m;
1318 	struct atto_vda_schedule_info *s;
1319 	struct atto_vda_buzzer_info *b;
1320 	u8 i;
1321 
1322 	switch (function) {
1323 	case VDAMGT_BUZZER_INFO:
1324 	case VDAMGT_BUZZER_SET:
1325 
1326 		b = (struct atto_vda_buzzer_info *)data;
1327 
1328 		b->duration = le32_to_cpu(b->duration);
1329 		break;
1330 
1331 	case VDAMGT_SCHEDULE_INFO:
1332 	case VDAMGT_SCHEDULE_EVENT:
1333 
1334 		s = (struct atto_vda_schedule_info *)data;
1335 
1336 		s->id = le32_to_cpu(s->id);
1337 
1338 		break;
1339 
1340 	case VDAMGT_DEV_INFO:
1341 	case VDAMGT_DEV_CLEAN:
1342 	case VDAMGT_DEV_PT_INFO:
1343 	case VDAMGT_DEV_FEATURES:
1344 	case VDAMGT_DEV_PT_FEATURES:
1345 	case VDAMGT_DEV_OPERATION:
1346 
1347 		d = (struct atto_vda_devinfo *)data;
1348 
1349 		d->capacity = le64_to_cpu(d->capacity);
1350 		d->block_size = le32_to_cpu(d->block_size);
1351 		d->ses_dev_index = le16_to_cpu(d->ses_dev_index);
1352 		d->target_id = le16_to_cpu(d->target_id);
1353 		d->lun = le16_to_cpu(d->lun);
1354 		d->features = le16_to_cpu(d->features);
1355 		break;
1356 
1357 	case VDAMGT_GRP_INFO:
1358 	case VDAMGT_GRP_CREATE:
1359 	case VDAMGT_GRP_DELETE:
1360 	case VDAMGT_ADD_STORAGE:
1361 	case VDAMGT_MEMBER_ADD:
1362 	case VDAMGT_GRP_COMMIT:
1363 	case VDAMGT_GRP_REBUILD:
1364 	case VDAMGT_GRP_COMMIT_INIT:
1365 	case VDAMGT_QUICK_RAID:
1366 	case VDAMGT_GRP_FEATURES:
1367 	case VDAMGT_GRP_COMMIT_INIT_AUTOMAP:
1368 	case VDAMGT_QUICK_RAID_INIT_AUTOMAP:
1369 	case VDAMGT_SPARE_LIST:
1370 	case VDAMGT_SPARE_ADD:
1371 	case VDAMGT_SPARE_REMOVE:
1372 	case VDAMGT_LOCAL_SPARE_ADD:
1373 	case VDAMGT_GRP_OPERATION:
1374 
1375 		g = (struct atto_vda_grp_info *)data;
1376 
1377 		g->capacity = le64_to_cpu(g->capacity);
1378 		g->block_size = le32_to_cpu(g->block_size);
1379 		g->interleave = le32_to_cpu(g->interleave);
1380 		g->features = le16_to_cpu(g->features);
1381 
1382 		for (i = 0; i < 32; i++)
1383 			g->members[i] = le16_to_cpu(g->members[i]);
1384 
1385 		break;
1386 
1387 	case VDAMGT_PART_INFO:
1388 	case VDAMGT_PART_MAP:
1389 	case VDAMGT_PART_UNMAP:
1390 	case VDAMGT_PART_AUTOMAP:
1391 	case VDAMGT_PART_SPLIT:
1392 	case VDAMGT_PART_MERGE:
1393 
1394 		p = (struct atto_vdapart_info *)data;
1395 
1396 		p->part_size = le64_to_cpu(p->part_size);
1397 		p->start_lba = le32_to_cpu(p->start_lba);
1398 		p->block_size = le32_to_cpu(p->block_size);
1399 		p->target_id = le16_to_cpu(p->target_id);
1400 		break;
1401 
1402 	case VDAMGT_DEV_HEALTH_REQ:
1403 
1404 		h = (struct atto_vda_dh_info *)data;
1405 
1406 		h->med_defect_cnt = le32_to_cpu(h->med_defect_cnt);
1407 		h->info_exc_cnt = le32_to_cpu(h->info_exc_cnt);
1408 		break;
1409 
1410 	case VDAMGT_DEV_METRICS:
1411 
1412 		m = (struct atto_vda_metrics_info *)data;
1413 
1414 		for (i = 0; i < 32; i++)
1415 			m->dev_indexes[i] = le16_to_cpu(m->dev_indexes[i]);
1416 
1417 		break;
1418 
1419 	default:
1420 		break;
1421 	}
1422 }
1423 
1424 void esas2r_nuxi_cfg_data(u8 function, void *data)
1425 {
1426 	struct atto_vda_cfg_init *ci;
1427 
1428 	switch (function) {
1429 	case VDA_CFG_INIT:
1430 	case VDA_CFG_GET_INIT:
1431 	case VDA_CFG_GET_INIT2:
1432 
1433 		ci = (struct atto_vda_cfg_init *)data;
1434 
1435 		ci->date_time.year = le16_to_cpu(ci->date_time.year);
1436 		ci->sgl_page_size = le32_to_cpu(ci->sgl_page_size);
1437 		ci->vda_version = le32_to_cpu(ci->vda_version);
1438 		ci->epoch_time = le32_to_cpu(ci->epoch_time);
1439 		ci->ioctl_tunnel = le32_to_cpu(ci->ioctl_tunnel);
1440 		ci->num_targets_backend = le32_to_cpu(ci->num_targets_backend);
1441 		break;
1442 
1443 	default:
1444 		break;
1445 	}
1446 }
1447 
1448 void esas2r_nuxi_ae_data(union atto_vda_ae *ae)
1449 {
1450 	struct atto_vda_ae_raid *r = &ae->raid;
1451 	struct atto_vda_ae_lu *l = &ae->lu;
1452 
1453 	switch (ae->hdr.bytype) {
1454 	case VDAAE_HDR_TYPE_RAID:
1455 
1456 		r->dwflags = le32_to_cpu(r->dwflags);
1457 		break;
1458 
1459 	case VDAAE_HDR_TYPE_LU:
1460 
1461 		l->dwevent = le32_to_cpu(l->dwevent);
1462 		l->wphys_target_id = le16_to_cpu(l->wphys_target_id);
1463 		l->id.tgtlun.wtarget_id = le16_to_cpu(l->id.tgtlun.wtarget_id);
1464 
1465 		if (l->hdr.bylength >= offsetof(struct atto_vda_ae_lu, id)
1466 		    + sizeof(struct atto_vda_ae_lu_tgt_lun_raid)) {
1467 			l->id.tgtlun_raid.dwinterleave
1468 				= le32_to_cpu(l->id.tgtlun_raid.dwinterleave);
1469 			l->id.tgtlun_raid.dwblock_size
1470 				= le32_to_cpu(l->id.tgtlun_raid.dwblock_size);
1471 		}
1472 
1473 		break;
1474 
1475 	case VDAAE_HDR_TYPE_DISK:
1476 	default:
1477 		break;
1478 	}
1479 }
1480 
1481 void esas2r_free_request(struct esas2r_adapter *a, struct esas2r_request *rq)
1482 {
1483 	unsigned long flags;
1484 
1485 	esas2r_rq_destroy_request(rq, a);
1486 	spin_lock_irqsave(&a->request_lock, flags);
1487 	list_add(&rq->comp_list, &a->avail_request);
1488 	spin_unlock_irqrestore(&a->request_lock, flags);
1489 }
1490 
1491 struct esas2r_request *esas2r_alloc_request(struct esas2r_adapter *a)
1492 {
1493 	struct esas2r_request *rq;
1494 	unsigned long flags;
1495 
1496 	spin_lock_irqsave(&a->request_lock, flags);
1497 
1498 	if (unlikely(list_empty(&a->avail_request))) {
1499 		spin_unlock_irqrestore(&a->request_lock, flags);
1500 		return NULL;
1501 	}
1502 
1503 	rq = list_first_entry(&a->avail_request, struct esas2r_request,
1504 			      comp_list);
1505 	list_del(&rq->comp_list);
1506 	spin_unlock_irqrestore(&a->request_lock, flags);
1507 	esas2r_rq_init_request(rq, a);
1508 
1509 	return rq;
1510 
1511 }
1512 
1513 void esas2r_complete_request_cb(struct esas2r_adapter *a,
1514 				struct esas2r_request *rq)
1515 {
1516 	esas2r_debug("completing request %p\n", rq);
1517 
1518 	scsi_dma_unmap(rq->cmd);
1519 
1520 	if (unlikely(rq->req_stat != RS_SUCCESS)) {
1521 		esas2r_debug("[%x STATUS %x:%x (%x)]", rq->target_id,
1522 			     rq->req_stat,
1523 			     rq->func_rsp.scsi_rsp.scsi_stat,
1524 			     rq->cmd);
1525 
1526 		rq->cmd->result =
1527 			((esas2r_req_status_to_error(rq->req_stat) << 16)
1528 			 | rq->func_rsp.scsi_rsp.scsi_stat);
1529 
1530 		if (rq->req_stat == RS_UNDERRUN)
1531 			scsi_set_resid(rq->cmd,
1532 				       le32_to_cpu(rq->func_rsp.scsi_rsp.
1533 						   residual_length));
1534 		else
1535 			scsi_set_resid(rq->cmd, 0);
1536 	}
1537 
1538 	rq->cmd->scsi_done(rq->cmd);
1539 
1540 	esas2r_free_request(a, rq);
1541 }
1542 
1543 /* Run tasklet to handle stuff outside of interrupt context. */
1544 void esas2r_adapter_tasklet(unsigned long context)
1545 {
1546 	struct esas2r_adapter *a = (struct esas2r_adapter *)context;
1547 
1548 	if (unlikely(test_bit(AF2_TIMER_TICK, &a->flags2))) {
1549 		clear_bit(AF2_TIMER_TICK, &a->flags2);
1550 		esas2r_timer_tick(a);
1551 	}
1552 
1553 	if (likely(test_bit(AF2_INT_PENDING, &a->flags2))) {
1554 		clear_bit(AF2_INT_PENDING, &a->flags2);
1555 		esas2r_adapter_interrupt(a);
1556 	}
1557 
1558 	if (esas2r_is_tasklet_pending(a))
1559 		esas2r_do_tasklet_tasks(a);
1560 
1561 	if (esas2r_is_tasklet_pending(a)
1562 	    || (test_bit(AF2_INT_PENDING, &a->flags2))
1563 	    || (test_bit(AF2_TIMER_TICK, &a->flags2))) {
1564 		clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1565 		esas2r_schedule_tasklet(a);
1566 	} else {
1567 		clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1568 	}
1569 }
1570 
1571 static void esas2r_timer_callback(struct timer_list *t);
1572 
1573 void esas2r_kickoff_timer(struct esas2r_adapter *a)
1574 {
1575 	timer_setup(&a->timer, esas2r_timer_callback, 0);
1576 
1577 	a->timer.expires = jiffies +
1578 			   msecs_to_jiffies(100);
1579 
1580 	add_timer(&a->timer);
1581 }
1582 
1583 static void esas2r_timer_callback(struct timer_list *t)
1584 {
1585 	struct esas2r_adapter *a = from_timer(a, t, timer);
1586 
1587 	set_bit(AF2_TIMER_TICK, &a->flags2);
1588 
1589 	esas2r_schedule_tasklet(a);
1590 
1591 	esas2r_kickoff_timer(a);
1592 }
1593 
1594 /*
1595  * Firmware events need to be handled outside of interrupt context
1596  * so we schedule a delayed_work to handle them.
1597  */
1598 
1599 static void
1600 esas2r_free_fw_event(struct esas2r_fw_event_work *fw_event)
1601 {
1602 	unsigned long flags;
1603 	struct esas2r_adapter *a = fw_event->a;
1604 
1605 	spin_lock_irqsave(&a->fw_event_lock, flags);
1606 	list_del(&fw_event->list);
1607 	kfree(fw_event);
1608 	spin_unlock_irqrestore(&a->fw_event_lock, flags);
1609 }
1610 
1611 void
1612 esas2r_fw_event_off(struct esas2r_adapter *a)
1613 {
1614 	unsigned long flags;
1615 
1616 	spin_lock_irqsave(&a->fw_event_lock, flags);
1617 	a->fw_events_off = 1;
1618 	spin_unlock_irqrestore(&a->fw_event_lock, flags);
1619 }
1620 
1621 void
1622 esas2r_fw_event_on(struct esas2r_adapter *a)
1623 {
1624 	unsigned long flags;
1625 
1626 	spin_lock_irqsave(&a->fw_event_lock, flags);
1627 	a->fw_events_off = 0;
1628 	spin_unlock_irqrestore(&a->fw_event_lock, flags);
1629 }
1630 
1631 static void esas2r_add_device(struct esas2r_adapter *a, u16 target_id)
1632 {
1633 	int ret;
1634 	struct scsi_device *scsi_dev;
1635 
1636 	scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
1637 
1638 	if (scsi_dev) {
1639 		esas2r_log_dev(
1640 			ESAS2R_LOG_WARN,
1641 			&(scsi_dev->
1642 			  sdev_gendev),
1643 			"scsi device already exists at id %d", target_id);
1644 
1645 		scsi_device_put(scsi_dev);
1646 	} else {
1647 		esas2r_log_dev(
1648 			ESAS2R_LOG_INFO,
1649 			&(a->host->
1650 			  shost_gendev),
1651 			"scsi_add_device() called for 0:%d:0",
1652 			target_id);
1653 
1654 		ret = scsi_add_device(a->host, 0, target_id, 0);
1655 		if (ret) {
1656 			esas2r_log_dev(
1657 				ESAS2R_LOG_CRIT,
1658 				&(a->host->
1659 				  shost_gendev),
1660 				"scsi_add_device failed with %d for id %d",
1661 				ret, target_id);
1662 		}
1663 	}
1664 }
1665 
1666 static void esas2r_remove_device(struct esas2r_adapter *a, u16 target_id)
1667 {
1668 	struct scsi_device *scsi_dev;
1669 
1670 	scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
1671 
1672 	if (scsi_dev) {
1673 		scsi_device_set_state(scsi_dev, SDEV_OFFLINE);
1674 
1675 		esas2r_log_dev(
1676 			ESAS2R_LOG_INFO,
1677 			&(scsi_dev->
1678 			  sdev_gendev),
1679 			"scsi_remove_device() called for 0:%d:0",
1680 			target_id);
1681 
1682 		scsi_remove_device(scsi_dev);
1683 
1684 		esas2r_log_dev(
1685 			ESAS2R_LOG_INFO,
1686 			&(scsi_dev->
1687 			  sdev_gendev),
1688 			"scsi_device_put() called");
1689 
1690 		scsi_device_put(scsi_dev);
1691 	} else {
1692 		esas2r_log_dev(
1693 			ESAS2R_LOG_WARN,
1694 			&(a->host->shost_gendev),
1695 			"no target found at id %d",
1696 			target_id);
1697 	}
1698 }
1699 
1700 /*
1701  * Sends a firmware asynchronous event to anyone who happens to be
1702  * listening on the defined ATTO VDA event ports.
1703  */
1704 static void esas2r_send_ae_event(struct esas2r_fw_event_work *fw_event)
1705 {
1706 	struct esas2r_vda_ae *ae = (struct esas2r_vda_ae *)fw_event->data;
1707 	char *type;
1708 
1709 	switch (ae->vda_ae.hdr.bytype) {
1710 	case VDAAE_HDR_TYPE_RAID:
1711 		type = "RAID group state change";
1712 		break;
1713 
1714 	case VDAAE_HDR_TYPE_LU:
1715 		type = "Mapped destination LU change";
1716 		break;
1717 
1718 	case VDAAE_HDR_TYPE_DISK:
1719 		type = "Physical disk inventory change";
1720 		break;
1721 
1722 	case VDAAE_HDR_TYPE_RESET:
1723 		type = "Firmware reset";
1724 		break;
1725 
1726 	case VDAAE_HDR_TYPE_LOG_INFO:
1727 		type = "Event Log message (INFO level)";
1728 		break;
1729 
1730 	case VDAAE_HDR_TYPE_LOG_WARN:
1731 		type = "Event Log message (WARN level)";
1732 		break;
1733 
1734 	case VDAAE_HDR_TYPE_LOG_CRIT:
1735 		type = "Event Log message (CRIT level)";
1736 		break;
1737 
1738 	case VDAAE_HDR_TYPE_LOG_FAIL:
1739 		type = "Event Log message (FAIL level)";
1740 		break;
1741 
1742 	case VDAAE_HDR_TYPE_NVC:
1743 		type = "NVCache change";
1744 		break;
1745 
1746 	case VDAAE_HDR_TYPE_TLG_INFO:
1747 		type = "Time stamped log message (INFO level)";
1748 		break;
1749 
1750 	case VDAAE_HDR_TYPE_TLG_WARN:
1751 		type = "Time stamped log message (WARN level)";
1752 		break;
1753 
1754 	case VDAAE_HDR_TYPE_TLG_CRIT:
1755 		type = "Time stamped log message (CRIT level)";
1756 		break;
1757 
1758 	case VDAAE_HDR_TYPE_PWRMGT:
1759 		type = "Power management";
1760 		break;
1761 
1762 	case VDAAE_HDR_TYPE_MUTE:
1763 		type = "Mute button pressed";
1764 		break;
1765 
1766 	case VDAAE_HDR_TYPE_DEV:
1767 		type = "Device attribute change";
1768 		break;
1769 
1770 	default:
1771 		type = "Unknown";
1772 		break;
1773 	}
1774 
1775 	esas2r_log(ESAS2R_LOG_WARN,
1776 		   "An async event of type \"%s\" was received from the firmware.  The event contents are:",
1777 		   type);
1778 	esas2r_log_hexdump(ESAS2R_LOG_WARN, &ae->vda_ae,
1779 			   ae->vda_ae.hdr.bylength);
1780 
1781 }
1782 
1783 static void
1784 esas2r_firmware_event_work(struct work_struct *work)
1785 {
1786 	struct esas2r_fw_event_work *fw_event =
1787 		container_of(work, struct esas2r_fw_event_work, work.work);
1788 
1789 	struct esas2r_adapter *a = fw_event->a;
1790 
1791 	u16 target_id = *(u16 *)&fw_event->data[0];
1792 
1793 	if (a->fw_events_off)
1794 		goto done;
1795 
1796 	switch (fw_event->type) {
1797 	case fw_event_null:
1798 		break; /* do nothing */
1799 
1800 	case fw_event_lun_change:
1801 		esas2r_remove_device(a, target_id);
1802 		esas2r_add_device(a, target_id);
1803 		break;
1804 
1805 	case fw_event_present:
1806 		esas2r_add_device(a, target_id);
1807 		break;
1808 
1809 	case fw_event_not_present:
1810 		esas2r_remove_device(a, target_id);
1811 		break;
1812 
1813 	case fw_event_vda_ae:
1814 		esas2r_send_ae_event(fw_event);
1815 		break;
1816 	}
1817 
1818 done:
1819 	esas2r_free_fw_event(fw_event);
1820 }
1821 
1822 void esas2r_queue_fw_event(struct esas2r_adapter *a,
1823 			   enum fw_event_type type,
1824 			   void *data,
1825 			   int data_sz)
1826 {
1827 	struct esas2r_fw_event_work *fw_event;
1828 	unsigned long flags;
1829 
1830 	fw_event = kzalloc(sizeof(struct esas2r_fw_event_work), GFP_ATOMIC);
1831 	if (!fw_event) {
1832 		esas2r_log(ESAS2R_LOG_WARN,
1833 			   "esas2r_queue_fw_event failed to alloc");
1834 		return;
1835 	}
1836 
1837 	if (type == fw_event_vda_ae) {
1838 		struct esas2r_vda_ae *ae =
1839 			(struct esas2r_vda_ae *)fw_event->data;
1840 
1841 		ae->signature = ESAS2R_VDA_EVENT_SIG;
1842 		ae->bus_number = a->pcid->bus->number;
1843 		ae->devfn = a->pcid->devfn;
1844 		memcpy(&ae->vda_ae, data, sizeof(ae->vda_ae));
1845 	} else {
1846 		memcpy(fw_event->data, data, data_sz);
1847 	}
1848 
1849 	fw_event->type = type;
1850 	fw_event->a = a;
1851 
1852 	spin_lock_irqsave(&a->fw_event_lock, flags);
1853 	list_add_tail(&fw_event->list, &a->fw_event_list);
1854 	INIT_DELAYED_WORK(&fw_event->work, esas2r_firmware_event_work);
1855 	queue_delayed_work_on(
1856 		smp_processor_id(), a->fw_event_q, &fw_event->work,
1857 		msecs_to_jiffies(1));
1858 	spin_unlock_irqrestore(&a->fw_event_lock, flags);
1859 }
1860 
1861 void esas2r_target_state_changed(struct esas2r_adapter *a, u16 targ_id,
1862 				 u8 state)
1863 {
1864 	if (state == TS_LUN_CHANGE)
1865 		esas2r_queue_fw_event(a, fw_event_lun_change, &targ_id,
1866 				      sizeof(targ_id));
1867 	else if (state == TS_PRESENT)
1868 		esas2r_queue_fw_event(a, fw_event_present, &targ_id,
1869 				      sizeof(targ_id));
1870 	else if (state == TS_NOT_PRESENT)
1871 		esas2r_queue_fw_event(a, fw_event_not_present, &targ_id,
1872 				      sizeof(targ_id));
1873 }
1874 
1875 /* Translate status to a Linux SCSI mid-layer error code */
1876 int esas2r_req_status_to_error(u8 req_stat)
1877 {
1878 	switch (req_stat) {
1879 	case RS_OVERRUN:
1880 	case RS_UNDERRUN:
1881 	case RS_SUCCESS:
1882 	/*
1883 	 * NOTE: SCSI mid-layer wants a good status for a SCSI error, because
1884 	 *       it will check the scsi_stat value in the completion anyway.
1885 	 */
1886 	case RS_SCSI_ERROR:
1887 		return DID_OK;
1888 
1889 	case RS_SEL:
1890 	case RS_SEL2:
1891 		return DID_NO_CONNECT;
1892 
1893 	case RS_RESET:
1894 		return DID_RESET;
1895 
1896 	case RS_ABORTED:
1897 		return DID_ABORT;
1898 
1899 	case RS_BUSY:
1900 		return DID_BUS_BUSY;
1901 	}
1902 
1903 	/* everything else is just an error. */
1904 
1905 	return DID_ERROR;
1906 }
1907 
1908 module_init(esas2r_init);
1909 module_exit(esas2r_exit);
1910