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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
46MODULE_DESCRIPTION(ESAS2R_DRVR_NAME ": " ESAS2R_LONGNAME " driver");
47MODULE_AUTHOR("ATTO Technology, Inc.");
48MODULE_LICENSE("GPL");
49MODULE_VERSION(ESAS2R_VERSION_STR);
50
51/* global definitions */
52
53static int found_adapters;
54struct 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
60static 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
68static 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
77static 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
86static 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
95static 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
111static 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
120static 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
129static 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
140static 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
160static 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
171static 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
189static 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 %d 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
221ESAS2R_RW_BIN_ATTR(fw);
222ESAS2R_RW_BIN_ATTR(fs);
223ESAS2R_RW_BIN_ATTR(vda);
224ESAS2R_RW_BIN_ATTR(hw);
225ESAS2R_RW_BIN_ATTR(live_nvram);
226
227struct 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
234static struct scsi_host_template driver_template = {
235 .module = THIS_MODULE,
236 .show_info = esas2r_show_info,
237 .name = ESAS2R_LONGNAME,
238 .release = esas2r_release,
239 .info = esas2r_info,
240 .ioctl = esas2r_ioctl,
241 .queuecommand = esas2r_queuecommand,
242 .eh_abort_handler = esas2r_eh_abort,
243 .eh_device_reset_handler = esas2r_device_reset,
244 .eh_bus_reset_handler = esas2r_bus_reset,
245 .eh_host_reset_handler = esas2r_host_reset,
246 .eh_target_reset_handler = esas2r_target_reset,
247 .can_queue = 128,
248 .this_id = -1,
249 .sg_tablesize = SG_CHUNK_SIZE,
250 .cmd_per_lun =
251 ESAS2R_DEFAULT_CMD_PER_LUN,
252 .present = 0,
253 .unchecked_isa_dma = 0,
254 .use_clustering = ENABLE_CLUSTERING,
255 .emulated = 0,
256 .proc_name = ESAS2R_DRVR_NAME,
257 .change_queue_depth = scsi_change_queue_depth,
258 .max_sectors = 0xFFFF,
259};
260
261int sgl_page_size = 512;
262module_param(sgl_page_size, int, 0);
263MODULE_PARM_DESC(sgl_page_size,
264 "Scatter/gather list (SGL) page size in number of S/G "
265 "entries. If your application is doing a lot of very large "
266 "transfers, you may want to increase the SGL page size. "
267 "Default 512.");
268
269int num_sg_lists = 1024;
270module_param(num_sg_lists, int, 0);
271MODULE_PARM_DESC(num_sg_lists,
272 "Number of scatter/gather lists. Default 1024.");
273
274int sg_tablesize = SG_CHUNK_SIZE;
275module_param(sg_tablesize, int, 0);
276MODULE_PARM_DESC(sg_tablesize,
277 "Maximum number of entries in a scatter/gather table.");
278
279int num_requests = 256;
280module_param(num_requests, int, 0);
281MODULE_PARM_DESC(num_requests,
282 "Number of requests. Default 256.");
283
284int num_ae_requests = 4;
285module_param(num_ae_requests, int, 0);
286MODULE_PARM_DESC(num_ae_requests,
287 "Number of VDA asynchromous event requests. Default 4.");
288
289int cmd_per_lun = ESAS2R_DEFAULT_CMD_PER_LUN;
290module_param(cmd_per_lun, int, 0);
291MODULE_PARM_DESC(cmd_per_lun,
292 "Maximum number of commands per LUN. Default "
293 DEFINED_NUM_TO_STR(ESAS2R_DEFAULT_CMD_PER_LUN) ".");
294
295int can_queue = 128;
296module_param(can_queue, int, 0);
297MODULE_PARM_DESC(can_queue,
298 "Maximum number of commands per adapter. Default 128.");
299
300int esas2r_max_sectors = 0xFFFF;
301module_param(esas2r_max_sectors, int, 0);
302MODULE_PARM_DESC(esas2r_max_sectors,
303 "Maximum number of disk sectors in a single data transfer. "
304 "Default 65535 (largest possible setting).");
305
306int interrupt_mode = 1;
307module_param(interrupt_mode, int, 0);
308MODULE_PARM_DESC(interrupt_mode,
309 "Defines the interrupt mode to use. 0 for legacy"
310 ", 1 for MSI. Default is MSI (1).");
311
312static struct pci_device_id
313 esas2r_pci_table[] = {
314 { ATTO_VENDOR_ID, 0x0049, ATTO_VENDOR_ID, 0x0049,
315 0,
316 0, 0 },
317 { ATTO_VENDOR_ID, 0x0049, ATTO_VENDOR_ID, 0x004A,
318 0,
319 0, 0 },
320 { ATTO_VENDOR_ID, 0x0049, ATTO_VENDOR_ID, 0x004B,
321 0,
322 0, 0 },
323 { ATTO_VENDOR_ID, 0x0049, ATTO_VENDOR_ID, 0x004C,
324 0,
325 0, 0 },
326 { ATTO_VENDOR_ID, 0x0049, ATTO_VENDOR_ID, 0x004D,
327 0,
328 0, 0 },
329 { ATTO_VENDOR_ID, 0x0049, ATTO_VENDOR_ID, 0x004E,
330 0,
331 0, 0 },
332 { 0, 0, 0, 0,
333 0,
334 0, 0 }
335};
336
337MODULE_DEVICE_TABLE(pci, esas2r_pci_table);
338
339static int
340esas2r_probe(struct pci_dev *pcid, const struct pci_device_id *id);
341
342static void
343esas2r_remove(struct pci_dev *pcid);
344
345static struct pci_driver
346 esas2r_pci_driver = {
347 .name = ESAS2R_DRVR_NAME,
348 .id_table = esas2r_pci_table,
349 .probe = esas2r_probe,
350 .remove = esas2r_remove,
351 .suspend = esas2r_suspend,
352 .resume = esas2r_resume,
353};
354
355static int esas2r_probe(struct pci_dev *pcid,
356 const struct pci_device_id *id)
357{
358 struct Scsi_Host *host = NULL;
359 struct esas2r_adapter *a;
360 int err;
361
362 size_t host_alloc_size = sizeof(struct esas2r_adapter)
363 + ((num_requests) +
364 1) * sizeof(struct esas2r_request);
365
366 esas2r_log_dev(ESAS2R_LOG_DEBG, &(pcid->dev),
367 "esas2r_probe() 0x%02x 0x%02x 0x%02x 0x%02x",
368 pcid->vendor,
369 pcid->device,
370 pcid->subsystem_vendor,
371 pcid->subsystem_device);
372
373 esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
374 "before pci_enable_device() "
375 "enable_cnt: %d",
376 pcid->enable_cnt.counter);
377
378 err = pci_enable_device(pcid);
379 if (err != 0) {
380 esas2r_log_dev(ESAS2R_LOG_CRIT, &(pcid->dev),
381 "pci_enable_device() FAIL (%d)",
382 err);
383 return -ENODEV;
384 }
385
386 esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
387 "pci_enable_device() OK");
388 esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
389 "after pci_enable_device() enable_cnt: %d",
390 pcid->enable_cnt.counter);
391
392 host = scsi_host_alloc(&driver_template, host_alloc_size);
393 if (host == NULL) {
394 esas2r_log(ESAS2R_LOG_CRIT, "scsi_host_alloc() FAIL");
395 return -ENODEV;
396 }
397
398 memset(host->hostdata, 0, host_alloc_size);
399
400 a = (struct esas2r_adapter *)host->hostdata;
401
402 esas2r_log(ESAS2R_LOG_INFO, "scsi_host_alloc() OK host: %p", host);
403
404 /* override max LUN and max target id */
405
406 host->max_id = ESAS2R_MAX_ID + 1;
407 host->max_lun = 255;
408
409 /* we can handle 16-byte CDbs */
410
411 host->max_cmd_len = 16;
412
413 host->can_queue = can_queue;
414 host->cmd_per_lun = cmd_per_lun;
415 host->this_id = host->max_id + 1;
416 host->max_channel = 0;
417 host->unique_id = found_adapters;
418 host->sg_tablesize = sg_tablesize;
419 host->max_sectors = esas2r_max_sectors;
420
421 /* set to bus master for BIOses that don't do it for us */
422
423 esas2r_log(ESAS2R_LOG_INFO, "pci_set_master() called");
424
425 pci_set_master(pcid);
426
427 if (!esas2r_init_adapter(host, pcid, found_adapters)) {
428 esas2r_log(ESAS2R_LOG_CRIT,
429 "unable to initialize device at PCI bus %x:%x",
430 pcid->bus->number,
431 pcid->devfn);
432
433 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
434 "scsi_host_put() called");
435
436 scsi_host_put(host);
437
438 return 0;
439
440 }
441
442 esas2r_log(ESAS2R_LOG_INFO, "pci_set_drvdata(%p, %p) called", pcid,
443 host->hostdata);
444
445 pci_set_drvdata(pcid, host);
446
447 esas2r_log(ESAS2R_LOG_INFO, "scsi_add_host() called");
448
449 err = scsi_add_host(host, &pcid->dev);
450
451 if (err) {
452 esas2r_log(ESAS2R_LOG_CRIT, "scsi_add_host returned %d", err);
453 esas2r_log_dev(ESAS2R_LOG_CRIT, &(host->shost_gendev),
454 "scsi_add_host() FAIL");
455
456 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
457 "scsi_host_put() called");
458
459 scsi_host_put(host);
460
461 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
462 "pci_set_drvdata(%p, NULL) called",
463 pcid);
464
465 pci_set_drvdata(pcid, NULL);
466
467 return -ENODEV;
468 }
469
470
471 esas2r_fw_event_on(a);
472
473 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
474 "scsi_scan_host() called");
475
476 scsi_scan_host(host);
477
478 /* Add sysfs binary files */
479 if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fw))
480 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
481 "Failed to create sysfs binary file: fw");
482 else
483 a->sysfs_fw_created = 1;
484
485 if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fs))
486 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
487 "Failed to create sysfs binary file: fs");
488 else
489 a->sysfs_fs_created = 1;
490
491 if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_vda))
492 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
493 "Failed to create sysfs binary file: vda");
494 else
495 a->sysfs_vda_created = 1;
496
497 if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_hw))
498 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
499 "Failed to create sysfs binary file: hw");
500 else
501 a->sysfs_hw_created = 1;
502
503 if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_live_nvram))
504 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
505 "Failed to create sysfs binary file: live_nvram");
506 else
507 a->sysfs_live_nvram_created = 1;
508
509 if (sysfs_create_bin_file(&host->shost_dev.kobj,
510 &bin_attr_default_nvram))
511 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
512 "Failed to create sysfs binary file: default_nvram");
513 else
514 a->sysfs_default_nvram_created = 1;
515
516 found_adapters++;
517
518 return 0;
519}
520
521static void esas2r_remove(struct pci_dev *pdev)
522{
523 struct Scsi_Host *host;
524 int index;
525
526 if (pdev == NULL) {
527 esas2r_log(ESAS2R_LOG_WARN, "esas2r_remove pdev==NULL");
528 return;
529 }
530
531 host = pci_get_drvdata(pdev);
532
533 if (host == NULL) {
534 /*
535 * this can happen if pci_set_drvdata was already called
536 * to clear the host pointer. if this is the case, we
537 * are okay; this channel has already been cleaned up.
538 */
539
540 return;
541 }
542
543 esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
544 "esas2r_remove(%p) called; "
545 "host:%p", pdev,
546 host);
547
548 index = esas2r_cleanup(host);
549
550 if (index < 0)
551 esas2r_log_dev(ESAS2R_LOG_WARN, &(pdev->dev),
552 "unknown host in %s",
553 __func__);
554
555 found_adapters--;
556
557 /* if this was the last adapter, clean up the rest of the driver */
558
559 if (found_adapters == 0)
560 esas2r_cleanup(NULL);
561}
562
563static int __init esas2r_init(void)
564{
565 int i;
566
567 esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
568
569 /* verify valid parameters */
570
571 if (can_queue < 1) {
572 esas2r_log(ESAS2R_LOG_WARN,
573 "warning: can_queue must be at least 1, value "
574 "forced.");
575 can_queue = 1;
576 } else if (can_queue > 2048) {
577 esas2r_log(ESAS2R_LOG_WARN,
578 "warning: can_queue must be no larger than 2048, "
579 "value forced.");
580 can_queue = 2048;
581 }
582
583 if (cmd_per_lun < 1) {
584 esas2r_log(ESAS2R_LOG_WARN,
585 "warning: cmd_per_lun must be at least 1, value "
586 "forced.");
587 cmd_per_lun = 1;
588 } else if (cmd_per_lun > 2048) {
589 esas2r_log(ESAS2R_LOG_WARN,
590 "warning: cmd_per_lun must be no larger than "
591 "2048, value forced.");
592 cmd_per_lun = 2048;
593 }
594
595 if (sg_tablesize < 32) {
596 esas2r_log(ESAS2R_LOG_WARN,
597 "warning: sg_tablesize must be at least 32, "
598 "value forced.");
599 sg_tablesize = 32;
600 }
601
602 if (esas2r_max_sectors < 1) {
603 esas2r_log(ESAS2R_LOG_WARN,
604 "warning: esas2r_max_sectors must be at least "
605 "1, value forced.");
606 esas2r_max_sectors = 1;
607 } else if (esas2r_max_sectors > 0xffff) {
608 esas2r_log(ESAS2R_LOG_WARN,
609 "warning: esas2r_max_sectors must be no larger "
610 "than 0xffff, value forced.");
611 esas2r_max_sectors = 0xffff;
612 }
613
614 sgl_page_size &= ~(ESAS2R_SGL_ALIGN - 1);
615
616 if (sgl_page_size < SGL_PG_SZ_MIN)
617 sgl_page_size = SGL_PG_SZ_MIN;
618 else if (sgl_page_size > SGL_PG_SZ_MAX)
619 sgl_page_size = SGL_PG_SZ_MAX;
620
621 if (num_sg_lists < NUM_SGL_MIN)
622 num_sg_lists = NUM_SGL_MIN;
623 else if (num_sg_lists > NUM_SGL_MAX)
624 num_sg_lists = NUM_SGL_MAX;
625
626 if (num_requests < NUM_REQ_MIN)
627 num_requests = NUM_REQ_MIN;
628 else if (num_requests > NUM_REQ_MAX)
629 num_requests = NUM_REQ_MAX;
630
631 if (num_ae_requests < NUM_AE_MIN)
632 num_ae_requests = NUM_AE_MIN;
633 else if (num_ae_requests > NUM_AE_MAX)
634 num_ae_requests = NUM_AE_MAX;
635
636 /* set up other globals */
637
638 for (i = 0; i < MAX_ADAPTERS; i++)
639 esas2r_adapters[i] = NULL;
640
641 /* initialize */
642
643 driver_template.module = THIS_MODULE;
644
645 if (pci_register_driver(&esas2r_pci_driver) != 0)
646 esas2r_log(ESAS2R_LOG_CRIT, "pci_register_driver FAILED");
647 else
648 esas2r_log(ESAS2R_LOG_INFO, "pci_register_driver() OK");
649
650 if (!found_adapters) {
651 pci_unregister_driver(&esas2r_pci_driver);
652 esas2r_cleanup(NULL);
653
654 esas2r_log(ESAS2R_LOG_CRIT,
655 "driver will not be loaded because no ATTO "
656 "%s devices were found",
657 ESAS2R_DRVR_NAME);
658 return -1;
659 } else {
660 esas2r_log(ESAS2R_LOG_INFO, "found %d adapters",
661 found_adapters);
662 }
663
664 return 0;
665}
666
667/* Handle ioctl calls to "/proc/scsi/esas2r/ATTOnode" */
668static const struct file_operations esas2r_proc_fops = {
669 .compat_ioctl = esas2r_proc_ioctl,
670 .unlocked_ioctl = esas2r_proc_ioctl,
671};
672
673static struct Scsi_Host *esas2r_proc_host;
674static int esas2r_proc_major;
675
676long esas2r_proc_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
677{
678 return esas2r_ioctl_handler(esas2r_proc_host->hostdata,
679 (int)cmd, (void __user *)arg);
680}
681
682static void __exit esas2r_exit(void)
683{
684 esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
685
686 if (esas2r_proc_major > 0) {
687 esas2r_log(ESAS2R_LOG_INFO, "unregister proc");
688
689 remove_proc_entry(ATTONODE_NAME,
690 esas2r_proc_host->hostt->proc_dir);
691 unregister_chrdev(esas2r_proc_major, ESAS2R_DRVR_NAME);
692
693 esas2r_proc_major = 0;
694 }
695
696 esas2r_log(ESAS2R_LOG_INFO, "pci_unregister_driver() called");
697
698 pci_unregister_driver(&esas2r_pci_driver);
699}
700
701int esas2r_show_info(struct seq_file *m, struct Scsi_Host *sh)
702{
703 struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
704
705 struct esas2r_target *t;
706 int dev_count = 0;
707
708 esas2r_log(ESAS2R_LOG_DEBG, "esas2r_show_info (%p,%d)", m, sh->host_no);
709
710 seq_printf(m, ESAS2R_LONGNAME "\n"
711 "Driver version: "ESAS2R_VERSION_STR "\n"
712 "Flash version: %s\n"
713 "Firmware version: %s\n"
714 "Copyright "ESAS2R_COPYRIGHT_YEARS "\n"
715 "http://www.attotech.com\n"
716 "\n",
717 a->flash_rev,
718 a->fw_rev[0] ? a->fw_rev : "(none)");
719
720
721 seq_printf(m, "Adapter information:\n"
722 "--------------------\n"
723 "Model: %s\n"
724 "SAS address: %02X%02X%02X%02X:%02X%02X%02X%02X\n",
725 esas2r_get_model_name(a),
726 a->nvram->sas_addr[0],
727 a->nvram->sas_addr[1],
728 a->nvram->sas_addr[2],
729 a->nvram->sas_addr[3],
730 a->nvram->sas_addr[4],
731 a->nvram->sas_addr[5],
732 a->nvram->sas_addr[6],
733 a->nvram->sas_addr[7]);
734
735 seq_puts(m, "\n"
736 "Discovered devices:\n"
737 "\n"
738 " # Target ID\n"
739 "---------------\n");
740
741 for (t = a->targetdb; t < a->targetdb_end; t++)
742 if (t->buffered_target_state == TS_PRESENT) {
743 seq_printf(m, " %3d %3d\n",
744 ++dev_count,
745 (u16)(uintptr_t)(t - a->targetdb));
746 }
747
748 if (dev_count == 0)
749 seq_puts(m, "none\n");
750
751 seq_putc(m, '\n');
752 return 0;
753
754}
755
756int esas2r_release(struct Scsi_Host *sh)
757{
758 esas2r_log_dev(ESAS2R_LOG_INFO, &(sh->shost_gendev),
759 "esas2r_release() called");
760
761 esas2r_cleanup(sh);
762 if (sh->irq)
763 free_irq(sh->irq, NULL);
764 scsi_unregister(sh);
765 return 0;
766}
767
768const char *esas2r_info(struct Scsi_Host *sh)
769{
770 struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
771 static char esas2r_info_str[512];
772
773 esas2r_log_dev(ESAS2R_LOG_INFO, &(sh->shost_gendev),
774 "esas2r_info() called");
775
776 /*
777 * if we haven't done so already, register as a char driver
778 * and stick a node under "/proc/scsi/esas2r/ATTOnode"
779 */
780
781 if (esas2r_proc_major <= 0) {
782 esas2r_proc_host = sh;
783
784 esas2r_proc_major = register_chrdev(0, ESAS2R_DRVR_NAME,
785 &esas2r_proc_fops);
786
787 esas2r_log_dev(ESAS2R_LOG_DEBG, &(sh->shost_gendev),
788 "register_chrdev (major %d)",
789 esas2r_proc_major);
790
791 if (esas2r_proc_major > 0) {
792 struct proc_dir_entry *pde;
793
794 pde = proc_create(ATTONODE_NAME, 0,
795 sh->hostt->proc_dir,
796 &esas2r_proc_fops);
797
798 if (!pde) {
799 esas2r_log_dev(ESAS2R_LOG_WARN,
800 &(sh->shost_gendev),
801 "failed to create_proc_entry");
802 esas2r_proc_major = -1;
803 }
804 }
805 }
806
807 sprintf(esas2r_info_str,
808 ESAS2R_LONGNAME " (bus 0x%02X, device 0x%02X, IRQ 0x%02X)"
809 " driver version: "ESAS2R_VERSION_STR " firmware version: "
810 "%s\n",
811 a->pcid->bus->number, a->pcid->devfn, a->pcid->irq,
812 a->fw_rev[0] ? a->fw_rev : "(none)");
813
814 return esas2r_info_str;
815}
816
817/* Callback for building a request scatter/gather list */
818static u32 get_physaddr_from_sgc(struct esas2r_sg_context *sgc, u64 *addr)
819{
820 u32 len;
821
822 if (likely(sgc->cur_offset == sgc->exp_offset)) {
823 /*
824 * the normal case: caller used all bytes from previous call, so
825 * expected offset is the same as the current offset.
826 */
827
828 if (sgc->sgel_count < sgc->num_sgel) {
829 /* retrieve next segment, except for first time */
830 if (sgc->exp_offset > (u8 *)0) {
831 /* advance current segment */
832 sgc->cur_sgel = sg_next(sgc->cur_sgel);
833 ++(sgc->sgel_count);
834 }
835
836
837 len = sg_dma_len(sgc->cur_sgel);
838 (*addr) = sg_dma_address(sgc->cur_sgel);
839
840 /* save the total # bytes returned to caller so far */
841 sgc->exp_offset += len;
842
843 } else {
844 len = 0;
845 }
846 } else if (sgc->cur_offset < sgc->exp_offset) {
847 /*
848 * caller did not use all bytes from previous call. need to
849 * compute the address based on current segment.
850 */
851
852 len = sg_dma_len(sgc->cur_sgel);
853 (*addr) = sg_dma_address(sgc->cur_sgel);
854
855 sgc->exp_offset -= len;
856
857 /* calculate PA based on prev segment address and offsets */
858 *addr = *addr +
859 (sgc->cur_offset - sgc->exp_offset);
860
861 sgc->exp_offset += len;
862
863 /* re-calculate length based on offset */
864 len = lower_32_bits(
865 sgc->exp_offset - sgc->cur_offset);
866 } else { /* if ( sgc->cur_offset > sgc->exp_offset ) */
867 /*
868 * we don't expect the caller to skip ahead.
869 * cur_offset will never exceed the len we return
870 */
871 len = 0;
872 }
873
874 return len;
875}
876
877int esas2r_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
878{
879 struct esas2r_adapter *a =
880 (struct esas2r_adapter *)cmd->device->host->hostdata;
881 struct esas2r_request *rq;
882 struct esas2r_sg_context sgc;
883 unsigned bufflen;
884
885 /* Assume success, if it fails we will fix the result later. */
886 cmd->result = DID_OK << 16;
887
888 if (unlikely(test_bit(AF_DEGRADED_MODE, &a->flags))) {
889 cmd->result = DID_NO_CONNECT << 16;
890 cmd->scsi_done(cmd);
891 return 0;
892 }
893
894 rq = esas2r_alloc_request(a);
895 if (unlikely(rq == NULL)) {
896 esas2r_debug("esas2r_alloc_request failed");
897 return SCSI_MLQUEUE_HOST_BUSY;
898 }
899
900 rq->cmd = cmd;
901 bufflen = scsi_bufflen(cmd);
902
903 if (likely(bufflen != 0)) {
904 if (cmd->sc_data_direction == DMA_TO_DEVICE)
905 rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_WRD);
906 else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
907 rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_RDD);
908 }
909
910 memcpy(rq->vrq->scsi.cdb, cmd->cmnd, cmd->cmd_len);
911 rq->vrq->scsi.length = cpu_to_le32(bufflen);
912 rq->target_id = cmd->device->id;
913 rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
914 rq->sense_buf = cmd->sense_buffer;
915 rq->sense_len = SCSI_SENSE_BUFFERSIZE;
916
917 esas2r_sgc_init(&sgc, a, rq, NULL);
918
919 sgc.length = bufflen;
920 sgc.cur_offset = NULL;
921
922 sgc.cur_sgel = scsi_sglist(cmd);
923 sgc.exp_offset = NULL;
924 sgc.num_sgel = scsi_dma_map(cmd);
925 sgc.sgel_count = 0;
926
927 if (unlikely(sgc.num_sgel < 0)) {
928 esas2r_free_request(a, rq);
929 return SCSI_MLQUEUE_HOST_BUSY;
930 }
931
932 sgc.get_phys_addr = (PGETPHYSADDR)get_physaddr_from_sgc;
933
934 if (unlikely(!esas2r_build_sg_list(a, rq, &sgc))) {
935 scsi_dma_unmap(cmd);
936 esas2r_free_request(a, rq);
937 return SCSI_MLQUEUE_HOST_BUSY;
938 }
939
940 esas2r_debug("start request %p to %d:%d\n", rq, (int)cmd->device->id,
941 (int)cmd->device->lun);
942
943 esas2r_start_request(a, rq);
944
945 return 0;
946}
947
948static void complete_task_management_request(struct esas2r_adapter *a,
949 struct esas2r_request *rq)
950{
951 (*rq->task_management_status_ptr) = rq->req_stat;
952 esas2r_free_request(a, rq);
953}
954
955/**
956 * Searches the specified queue for the specified queue for the command
957 * to abort.
958 *
959 * @param [in] a
960 * @param [in] abort_request
961 * @param [in] cmd
962 * t
963 * @return 0 on failure, 1 if command was not found, 2 if command was found
964 */
965static int esas2r_check_active_queue(struct esas2r_adapter *a,
966 struct esas2r_request **abort_request,
967 struct scsi_cmnd *cmd,
968 struct list_head *queue)
969{
970 bool found = false;
971 struct esas2r_request *ar = *abort_request;
972 struct esas2r_request *rq;
973 struct list_head *element, *next;
974
975 list_for_each_safe(element, next, queue) {
976
977 rq = list_entry(element, struct esas2r_request, req_list);
978
979 if (rq->cmd == cmd) {
980
981 /* Found the request. See what to do with it. */
982 if (queue == &a->active_list) {
983 /*
984 * We are searching the active queue, which
985 * means that we need to send an abort request
986 * to the firmware.
987 */
988 ar = esas2r_alloc_request(a);
989 if (ar == NULL) {
990 esas2r_log_dev(ESAS2R_LOG_WARN,
991 &(a->host->shost_gendev),
992 "unable to allocate an abort request for cmd %p",
993 cmd);
994 return 0; /* Failure */
995 }
996
997 /*
998 * Task management request must be formatted
999 * with a lock held.
1000 */
1001 ar->sense_len = 0;
1002 ar->vrq->scsi.length = 0;
1003 ar->target_id = rq->target_id;
1004 ar->vrq->scsi.flags |= cpu_to_le32(
1005 (u8)le32_to_cpu(rq->vrq->scsi.flags));
1006
1007 memset(ar->vrq->scsi.cdb, 0,
1008 sizeof(ar->vrq->scsi.cdb));
1009
1010 ar->vrq->scsi.flags |= cpu_to_le32(
1011 FCP_CMND_TRM);
1012 ar->vrq->scsi.u.abort_handle =
1013 rq->vrq->scsi.handle;
1014 } else {
1015 /*
1016 * The request is pending but not active on
1017 * the firmware. Just free it now and we'll
1018 * report the successful abort below.
1019 */
1020 list_del_init(&rq->req_list);
1021 esas2r_free_request(a, rq);
1022 }
1023
1024 found = true;
1025 break;
1026 }
1027
1028 }
1029
1030 if (!found)
1031 return 1; /* Not found */
1032
1033 return 2; /* found */
1034
1035
1036}
1037
1038int esas2r_eh_abort(struct scsi_cmnd *cmd)
1039{
1040 struct esas2r_adapter *a =
1041 (struct esas2r_adapter *)cmd->device->host->hostdata;
1042 struct esas2r_request *abort_request = NULL;
1043 unsigned long flags;
1044 struct list_head *queue;
1045 int result;
1046
1047 esas2r_log(ESAS2R_LOG_INFO, "eh_abort (%p)", cmd);
1048
1049 if (test_bit(AF_DEGRADED_MODE, &a->flags)) {
1050 cmd->result = DID_ABORT << 16;
1051
1052 scsi_set_resid(cmd, 0);
1053
1054 cmd->scsi_done(cmd);
1055
1056 return SUCCESS;
1057 }
1058
1059 spin_lock_irqsave(&a->queue_lock, flags);
1060
1061 /*
1062 * Run through the defer and active queues looking for the request
1063 * to abort.
1064 */
1065
1066 queue = &a->defer_list;
1067
1068check_active_queue:
1069
1070 result = esas2r_check_active_queue(a, &abort_request, cmd, queue);
1071
1072 if (!result) {
1073 spin_unlock_irqrestore(&a->queue_lock, flags);
1074 return FAILED;
1075 } else if (result == 2 && (queue == &a->defer_list)) {
1076 queue = &a->active_list;
1077 goto check_active_queue;
1078 }
1079
1080 spin_unlock_irqrestore(&a->queue_lock, flags);
1081
1082 if (abort_request) {
1083 u8 task_management_status = RS_PENDING;
1084
1085 /*
1086 * the request is already active, so we need to tell
1087 * the firmware to abort it and wait for the response.
1088 */
1089
1090 abort_request->comp_cb = complete_task_management_request;
1091 abort_request->task_management_status_ptr =
1092 &task_management_status;
1093
1094 esas2r_start_request(a, abort_request);
1095
1096 if (atomic_read(&a->disable_cnt) == 0)
1097 esas2r_do_deferred_processes(a);
1098
1099 while (task_management_status == RS_PENDING)
1100 msleep(10);
1101
1102 /*
1103 * Once we get here, the original request will have been
1104 * completed by the firmware and the abort request will have
1105 * been cleaned up. we're done!
1106 */
1107
1108 return SUCCESS;
1109 }
1110
1111 /*
1112 * If we get here, either we found the inactive request and
1113 * freed it, or we didn't find it at all. Either way, success!
1114 */
1115
1116 cmd->result = DID_ABORT << 16;
1117
1118 scsi_set_resid(cmd, 0);
1119
1120 cmd->scsi_done(cmd);
1121
1122 return SUCCESS;
1123}
1124
1125static int esas2r_host_bus_reset(struct scsi_cmnd *cmd, bool host_reset)
1126{
1127 struct esas2r_adapter *a =
1128 (struct esas2r_adapter *)cmd->device->host->hostdata;
1129
1130 if (test_bit(AF_DEGRADED_MODE, &a->flags))
1131 return FAILED;
1132
1133 if (host_reset)
1134 esas2r_reset_adapter(a);
1135 else
1136 esas2r_reset_bus(a);
1137
1138 /* above call sets the AF_OS_RESET flag. wait for it to clear. */
1139
1140 while (test_bit(AF_OS_RESET, &a->flags)) {
1141 msleep(10);
1142
1143 if (test_bit(AF_DEGRADED_MODE, &a->flags))
1144 return FAILED;
1145 }
1146
1147 if (test_bit(AF_DEGRADED_MODE, &a->flags))
1148 return FAILED;
1149
1150 return SUCCESS;
1151}
1152
1153int esas2r_host_reset(struct scsi_cmnd *cmd)
1154{
1155 esas2r_log(ESAS2R_LOG_INFO, "host_reset (%p)", cmd);
1156
1157 return esas2r_host_bus_reset(cmd, true);
1158}
1159
1160int esas2r_bus_reset(struct scsi_cmnd *cmd)
1161{
1162 esas2r_log(ESAS2R_LOG_INFO, "bus_reset (%p)", cmd);
1163
1164 return esas2r_host_bus_reset(cmd, false);
1165}
1166
1167static int esas2r_dev_targ_reset(struct scsi_cmnd *cmd, bool target_reset)
1168{
1169 struct esas2r_adapter *a =
1170 (struct esas2r_adapter *)cmd->device->host->hostdata;
1171 struct esas2r_request *rq;
1172 u8 task_management_status = RS_PENDING;
1173 bool completed;
1174
1175 if (test_bit(AF_DEGRADED_MODE, &a->flags))
1176 return FAILED;
1177
1178retry:
1179 rq = esas2r_alloc_request(a);
1180 if (rq == NULL) {
1181 if (target_reset) {
1182 esas2r_log(ESAS2R_LOG_CRIT,
1183 "unable to allocate a request for a "
1184 "target reset (%d)!",
1185 cmd->device->id);
1186 } else {
1187 esas2r_log(ESAS2R_LOG_CRIT,
1188 "unable to allocate a request for a "
1189 "device reset (%d:%d)!",
1190 cmd->device->id,
1191 cmd->device->lun);
1192 }
1193
1194
1195 return FAILED;
1196 }
1197
1198 rq->target_id = cmd->device->id;
1199 rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
1200 rq->req_stat = RS_PENDING;
1201
1202 rq->comp_cb = complete_task_management_request;
1203 rq->task_management_status_ptr = &task_management_status;
1204
1205 if (target_reset) {
1206 esas2r_debug("issuing target reset (%p) to id %d", rq,
1207 cmd->device->id);
1208 completed = esas2r_send_task_mgmt(a, rq, 0x20);
1209 } else {
1210 esas2r_debug("issuing device reset (%p) to id %d lun %d", rq,
1211 cmd->device->id, cmd->device->lun);
1212 completed = esas2r_send_task_mgmt(a, rq, 0x10);
1213 }
1214
1215 if (completed) {
1216 /* Task management cmd completed right away, need to free it. */
1217
1218 esas2r_free_request(a, rq);
1219 } else {
1220 /*
1221 * Wait for firmware to complete the request. Completion
1222 * callback will free it.
1223 */
1224 while (task_management_status == RS_PENDING)
1225 msleep(10);
1226 }
1227
1228 if (test_bit(AF_DEGRADED_MODE, &a->flags))
1229 return FAILED;
1230
1231 if (task_management_status == RS_BUSY) {
1232 /*
1233 * Busy, probably because we are flashing. Wait a bit and
1234 * try again.
1235 */
1236 msleep(100);
1237 goto retry;
1238 }
1239
1240 return SUCCESS;
1241}
1242
1243int esas2r_device_reset(struct scsi_cmnd *cmd)
1244{
1245 esas2r_log(ESAS2R_LOG_INFO, "device_reset (%p)", cmd);
1246
1247 return esas2r_dev_targ_reset(cmd, false);
1248
1249}
1250
1251int esas2r_target_reset(struct scsi_cmnd *cmd)
1252{
1253 esas2r_log(ESAS2R_LOG_INFO, "target_reset (%p)", cmd);
1254
1255 return esas2r_dev_targ_reset(cmd, true);
1256}
1257
1258void esas2r_log_request_failure(struct esas2r_adapter *a,
1259 struct esas2r_request *rq)
1260{
1261 u8 reqstatus = rq->req_stat;
1262
1263 if (reqstatus == RS_SUCCESS)
1264 return;
1265
1266 if (rq->vrq->scsi.function == VDA_FUNC_SCSI) {
1267 if (reqstatus == RS_SCSI_ERROR) {
1268 if (rq->func_rsp.scsi_rsp.sense_len >= 13) {
1269 esas2r_log(ESAS2R_LOG_WARN,
1270 "request failure - SCSI error %x ASC:%x ASCQ:%x CDB:%x",
1271 rq->sense_buf[2], rq->sense_buf[12],
1272 rq->sense_buf[13],
1273 rq->vrq->scsi.cdb[0]);
1274 } else {
1275 esas2r_log(ESAS2R_LOG_WARN,
1276 "request failure - SCSI error CDB:%x\n",
1277 rq->vrq->scsi.cdb[0]);
1278 }
1279 } else if ((rq->vrq->scsi.cdb[0] != INQUIRY
1280 && rq->vrq->scsi.cdb[0] != REPORT_LUNS)
1281 || (reqstatus != RS_SEL
1282 && reqstatus != RS_SEL2)) {
1283 if ((reqstatus == RS_UNDERRUN) &&
1284 (rq->vrq->scsi.cdb[0] == INQUIRY)) {
1285 /* Don't log inquiry underruns */
1286 } else {
1287 esas2r_log(ESAS2R_LOG_WARN,
1288 "request failure - cdb:%x reqstatus:%d target:%d",
1289 rq->vrq->scsi.cdb[0], reqstatus,
1290 rq->target_id);
1291 }
1292 }
1293 }
1294}
1295
1296void esas2r_wait_request(struct esas2r_adapter *a, struct esas2r_request *rq)
1297{
1298 u32 starttime;
1299 u32 timeout;
1300
1301 starttime = jiffies_to_msecs(jiffies);
1302 timeout = rq->timeout ? rq->timeout : 5000;
1303
1304 while (true) {
1305 esas2r_polled_interrupt(a);
1306
1307 if (rq->req_stat != RS_STARTED)
1308 break;
1309
1310 schedule_timeout_interruptible(msecs_to_jiffies(100));
1311
1312 if ((jiffies_to_msecs(jiffies) - starttime) > timeout) {
1313 esas2r_hdebug("request TMO");
1314 esas2r_bugon();
1315
1316 rq->req_stat = RS_TIMEOUT;
1317
1318 esas2r_local_reset_adapter(a);
1319 return;
1320 }
1321 }
1322}
1323
1324u32 esas2r_map_data_window(struct esas2r_adapter *a, u32 addr_lo)
1325{
1326 u32 offset = addr_lo & (MW_DATA_WINDOW_SIZE - 1);
1327 u32 base = addr_lo & -(signed int)MW_DATA_WINDOW_SIZE;
1328
1329 if (a->window_base != base) {
1330 esas2r_write_register_dword(a, MVR_PCI_WIN1_REMAP,
1331 base | MVRPW1R_ENABLE);
1332 esas2r_flush_register_dword(a, MVR_PCI_WIN1_REMAP);
1333 a->window_base = base;
1334 }
1335
1336 return offset;
1337}
1338
1339/* Read a block of data from chip memory */
1340bool esas2r_read_mem_block(struct esas2r_adapter *a,
1341 void *to,
1342 u32 from,
1343 u32 size)
1344{
1345 u8 *end = (u8 *)to;
1346
1347 while (size) {
1348 u32 len;
1349 u32 offset;
1350 u32 iatvr;
1351
1352 iatvr = (from & -(signed int)MW_DATA_WINDOW_SIZE);
1353
1354 esas2r_map_data_window(a, iatvr);
1355
1356 offset = from & (MW_DATA_WINDOW_SIZE - 1);
1357 len = size;
1358
1359 if (len > MW_DATA_WINDOW_SIZE - offset)
1360 len = MW_DATA_WINDOW_SIZE - offset;
1361
1362 from += len;
1363 size -= len;
1364
1365 while (len--) {
1366 *end++ = esas2r_read_data_byte(a, offset);
1367 offset++;
1368 }
1369 }
1370
1371 return true;
1372}
1373
1374void esas2r_nuxi_mgt_data(u8 function, void *data)
1375{
1376 struct atto_vda_grp_info *g;
1377 struct atto_vda_devinfo *d;
1378 struct atto_vdapart_info *p;
1379 struct atto_vda_dh_info *h;
1380 struct atto_vda_metrics_info *m;
1381 struct atto_vda_schedule_info *s;
1382 struct atto_vda_buzzer_info *b;
1383 u8 i;
1384
1385 switch (function) {
1386 case VDAMGT_BUZZER_INFO:
1387 case VDAMGT_BUZZER_SET:
1388
1389 b = (struct atto_vda_buzzer_info *)data;
1390
1391 b->duration = le32_to_cpu(b->duration);
1392 break;
1393
1394 case VDAMGT_SCHEDULE_INFO:
1395 case VDAMGT_SCHEDULE_EVENT:
1396
1397 s = (struct atto_vda_schedule_info *)data;
1398
1399 s->id = le32_to_cpu(s->id);
1400
1401 break;
1402
1403 case VDAMGT_DEV_INFO:
1404 case VDAMGT_DEV_CLEAN:
1405 case VDAMGT_DEV_PT_INFO:
1406 case VDAMGT_DEV_FEATURES:
1407 case VDAMGT_DEV_PT_FEATURES:
1408 case VDAMGT_DEV_OPERATION:
1409
1410 d = (struct atto_vda_devinfo *)data;
1411
1412 d->capacity = le64_to_cpu(d->capacity);
1413 d->block_size = le32_to_cpu(d->block_size);
1414 d->ses_dev_index = le16_to_cpu(d->ses_dev_index);
1415 d->target_id = le16_to_cpu(d->target_id);
1416 d->lun = le16_to_cpu(d->lun);
1417 d->features = le16_to_cpu(d->features);
1418 break;
1419
1420 case VDAMGT_GRP_INFO:
1421 case VDAMGT_GRP_CREATE:
1422 case VDAMGT_GRP_DELETE:
1423 case VDAMGT_ADD_STORAGE:
1424 case VDAMGT_MEMBER_ADD:
1425 case VDAMGT_GRP_COMMIT:
1426 case VDAMGT_GRP_REBUILD:
1427 case VDAMGT_GRP_COMMIT_INIT:
1428 case VDAMGT_QUICK_RAID:
1429 case VDAMGT_GRP_FEATURES:
1430 case VDAMGT_GRP_COMMIT_INIT_AUTOMAP:
1431 case VDAMGT_QUICK_RAID_INIT_AUTOMAP:
1432 case VDAMGT_SPARE_LIST:
1433 case VDAMGT_SPARE_ADD:
1434 case VDAMGT_SPARE_REMOVE:
1435 case VDAMGT_LOCAL_SPARE_ADD:
1436 case VDAMGT_GRP_OPERATION:
1437
1438 g = (struct atto_vda_grp_info *)data;
1439
1440 g->capacity = le64_to_cpu(g->capacity);
1441 g->block_size = le32_to_cpu(g->block_size);
1442 g->interleave = le32_to_cpu(g->interleave);
1443 g->features = le16_to_cpu(g->features);
1444
1445 for (i = 0; i < 32; i++)
1446 g->members[i] = le16_to_cpu(g->members[i]);
1447
1448 break;
1449
1450 case VDAMGT_PART_INFO:
1451 case VDAMGT_PART_MAP:
1452 case VDAMGT_PART_UNMAP:
1453 case VDAMGT_PART_AUTOMAP:
1454 case VDAMGT_PART_SPLIT:
1455 case VDAMGT_PART_MERGE:
1456
1457 p = (struct atto_vdapart_info *)data;
1458
1459 p->part_size = le64_to_cpu(p->part_size);
1460 p->start_lba = le32_to_cpu(p->start_lba);
1461 p->block_size = le32_to_cpu(p->block_size);
1462 p->target_id = le16_to_cpu(p->target_id);
1463 break;
1464
1465 case VDAMGT_DEV_HEALTH_REQ:
1466
1467 h = (struct atto_vda_dh_info *)data;
1468
1469 h->med_defect_cnt = le32_to_cpu(h->med_defect_cnt);
1470 h->info_exc_cnt = le32_to_cpu(h->info_exc_cnt);
1471 break;
1472
1473 case VDAMGT_DEV_METRICS:
1474
1475 m = (struct atto_vda_metrics_info *)data;
1476
1477 for (i = 0; i < 32; i++)
1478 m->dev_indexes[i] = le16_to_cpu(m->dev_indexes[i]);
1479
1480 break;
1481
1482 default:
1483 break;
1484 }
1485}
1486
1487void esas2r_nuxi_cfg_data(u8 function, void *data)
1488{
1489 struct atto_vda_cfg_init *ci;
1490
1491 switch (function) {
1492 case VDA_CFG_INIT:
1493 case VDA_CFG_GET_INIT:
1494 case VDA_CFG_GET_INIT2:
1495
1496 ci = (struct atto_vda_cfg_init *)data;
1497
1498 ci->date_time.year = le16_to_cpu(ci->date_time.year);
1499 ci->sgl_page_size = le32_to_cpu(ci->sgl_page_size);
1500 ci->vda_version = le32_to_cpu(ci->vda_version);
1501 ci->epoch_time = le32_to_cpu(ci->epoch_time);
1502 ci->ioctl_tunnel = le32_to_cpu(ci->ioctl_tunnel);
1503 ci->num_targets_backend = le32_to_cpu(ci->num_targets_backend);
1504 break;
1505
1506 default:
1507 break;
1508 }
1509}
1510
1511void esas2r_nuxi_ae_data(union atto_vda_ae *ae)
1512{
1513 struct atto_vda_ae_raid *r = &ae->raid;
1514 struct atto_vda_ae_lu *l = &ae->lu;
1515
1516 switch (ae->hdr.bytype) {
1517 case VDAAE_HDR_TYPE_RAID:
1518
1519 r->dwflags = le32_to_cpu(r->dwflags);
1520 break;
1521
1522 case VDAAE_HDR_TYPE_LU:
1523
1524 l->dwevent = le32_to_cpu(l->dwevent);
1525 l->wphys_target_id = le16_to_cpu(l->wphys_target_id);
1526 l->id.tgtlun.wtarget_id = le16_to_cpu(l->id.tgtlun.wtarget_id);
1527
1528 if (l->hdr.bylength >= offsetof(struct atto_vda_ae_lu, id)
1529 + sizeof(struct atto_vda_ae_lu_tgt_lun_raid)) {
1530 l->id.tgtlun_raid.dwinterleave
1531 = le32_to_cpu(l->id.tgtlun_raid.dwinterleave);
1532 l->id.tgtlun_raid.dwblock_size
1533 = le32_to_cpu(l->id.tgtlun_raid.dwblock_size);
1534 }
1535
1536 break;
1537
1538 case VDAAE_HDR_TYPE_DISK:
1539 default:
1540 break;
1541 }
1542}
1543
1544void esas2r_free_request(struct esas2r_adapter *a, struct esas2r_request *rq)
1545{
1546 unsigned long flags;
1547
1548 esas2r_rq_destroy_request(rq, a);
1549 spin_lock_irqsave(&a->request_lock, flags);
1550 list_add(&rq->comp_list, &a->avail_request);
1551 spin_unlock_irqrestore(&a->request_lock, flags);
1552}
1553
1554struct esas2r_request *esas2r_alloc_request(struct esas2r_adapter *a)
1555{
1556 struct esas2r_request *rq;
1557 unsigned long flags;
1558
1559 spin_lock_irqsave(&a->request_lock, flags);
1560
1561 if (unlikely(list_empty(&a->avail_request))) {
1562 spin_unlock_irqrestore(&a->request_lock, flags);
1563 return NULL;
1564 }
1565
1566 rq = list_first_entry(&a->avail_request, struct esas2r_request,
1567 comp_list);
1568 list_del(&rq->comp_list);
1569 spin_unlock_irqrestore(&a->request_lock, flags);
1570 esas2r_rq_init_request(rq, a);
1571
1572 return rq;
1573
1574}
1575
1576void esas2r_complete_request_cb(struct esas2r_adapter *a,
1577 struct esas2r_request *rq)
1578{
1579 esas2r_debug("completing request %p\n", rq);
1580
1581 scsi_dma_unmap(rq->cmd);
1582
1583 if (unlikely(rq->req_stat != RS_SUCCESS)) {
1584 esas2r_debug("[%x STATUS %x:%x (%x)]", rq->target_id,
1585 rq->req_stat,
1586 rq->func_rsp.scsi_rsp.scsi_stat,
1587 rq->cmd);
1588
1589 rq->cmd->result =
1590 ((esas2r_req_status_to_error(rq->req_stat) << 16)
1591 | (rq->func_rsp.scsi_rsp.scsi_stat & STATUS_MASK));
1592
1593 if (rq->req_stat == RS_UNDERRUN)
1594 scsi_set_resid(rq->cmd,
1595 le32_to_cpu(rq->func_rsp.scsi_rsp.
1596 residual_length));
1597 else
1598 scsi_set_resid(rq->cmd, 0);
1599 }
1600
1601 rq->cmd->scsi_done(rq->cmd);
1602
1603 esas2r_free_request(a, rq);
1604}
1605
1606/* Run tasklet to handle stuff outside of interrupt context. */
1607void esas2r_adapter_tasklet(unsigned long context)
1608{
1609 struct esas2r_adapter *a = (struct esas2r_adapter *)context;
1610
1611 if (unlikely(test_bit(AF2_TIMER_TICK, &a->flags2))) {
1612 clear_bit(AF2_TIMER_TICK, &a->flags2);
1613 esas2r_timer_tick(a);
1614 }
1615
1616 if (likely(test_bit(AF2_INT_PENDING, &a->flags2))) {
1617 clear_bit(AF2_INT_PENDING, &a->flags2);
1618 esas2r_adapter_interrupt(a);
1619 }
1620
1621 if (esas2r_is_tasklet_pending(a))
1622 esas2r_do_tasklet_tasks(a);
1623
1624 if (esas2r_is_tasklet_pending(a)
1625 || (test_bit(AF2_INT_PENDING, &a->flags2))
1626 || (test_bit(AF2_TIMER_TICK, &a->flags2))) {
1627 clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1628 esas2r_schedule_tasklet(a);
1629 } else {
1630 clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1631 }
1632}
1633
1634static void esas2r_timer_callback(unsigned long context);
1635
1636void esas2r_kickoff_timer(struct esas2r_adapter *a)
1637{
1638 init_timer(&a->timer);
1639
1640 a->timer.function = esas2r_timer_callback;
1641 a->timer.data = (unsigned long)a;
1642 a->timer.expires = jiffies +
1643 msecs_to_jiffies(100);
1644
1645 add_timer(&a->timer);
1646}
1647
1648static void esas2r_timer_callback(unsigned long context)
1649{
1650 struct esas2r_adapter *a = (struct esas2r_adapter *)context;
1651
1652 set_bit(AF2_TIMER_TICK, &a->flags2);
1653
1654 esas2r_schedule_tasklet(a);
1655
1656 esas2r_kickoff_timer(a);
1657}
1658
1659/*
1660 * Firmware events need to be handled outside of interrupt context
1661 * so we schedule a delayed_work to handle them.
1662 */
1663
1664static void
1665esas2r_free_fw_event(struct esas2r_fw_event_work *fw_event)
1666{
1667 unsigned long flags;
1668 struct esas2r_adapter *a = fw_event->a;
1669
1670 spin_lock_irqsave(&a->fw_event_lock, flags);
1671 list_del(&fw_event->list);
1672 kfree(fw_event);
1673 spin_unlock_irqrestore(&a->fw_event_lock, flags);
1674}
1675
1676void
1677esas2r_fw_event_off(struct esas2r_adapter *a)
1678{
1679 unsigned long flags;
1680
1681 spin_lock_irqsave(&a->fw_event_lock, flags);
1682 a->fw_events_off = 1;
1683 spin_unlock_irqrestore(&a->fw_event_lock, flags);
1684}
1685
1686void
1687esas2r_fw_event_on(struct esas2r_adapter *a)
1688{
1689 unsigned long flags;
1690
1691 spin_lock_irqsave(&a->fw_event_lock, flags);
1692 a->fw_events_off = 0;
1693 spin_unlock_irqrestore(&a->fw_event_lock, flags);
1694}
1695
1696static void esas2r_add_device(struct esas2r_adapter *a, u16 target_id)
1697{
1698 int ret;
1699 struct scsi_device *scsi_dev;
1700
1701 scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
1702
1703 if (scsi_dev) {
1704 esas2r_log_dev(
1705 ESAS2R_LOG_WARN,
1706 &(scsi_dev->
1707 sdev_gendev),
1708 "scsi device already exists at id %d", target_id);
1709
1710 scsi_device_put(scsi_dev);
1711 } else {
1712 esas2r_log_dev(
1713 ESAS2R_LOG_INFO,
1714 &(a->host->
1715 shost_gendev),
1716 "scsi_add_device() called for 0:%d:0",
1717 target_id);
1718
1719 ret = scsi_add_device(a->host, 0, target_id, 0);
1720 if (ret) {
1721 esas2r_log_dev(
1722 ESAS2R_LOG_CRIT,
1723 &(a->host->
1724 shost_gendev),
1725 "scsi_add_device failed with %d for id %d",
1726 ret, target_id);
1727 }
1728 }
1729}
1730
1731static void esas2r_remove_device(struct esas2r_adapter *a, u16 target_id)
1732{
1733 struct scsi_device *scsi_dev;
1734
1735 scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
1736
1737 if (scsi_dev) {
1738 scsi_device_set_state(scsi_dev, SDEV_OFFLINE);
1739
1740 esas2r_log_dev(
1741 ESAS2R_LOG_INFO,
1742 &(scsi_dev->
1743 sdev_gendev),
1744 "scsi_remove_device() called for 0:%d:0",
1745 target_id);
1746
1747 scsi_remove_device(scsi_dev);
1748
1749 esas2r_log_dev(
1750 ESAS2R_LOG_INFO,
1751 &(scsi_dev->
1752 sdev_gendev),
1753 "scsi_device_put() called");
1754
1755 scsi_device_put(scsi_dev);
1756 } else {
1757 esas2r_log_dev(
1758 ESAS2R_LOG_WARN,
1759 &(a->host->shost_gendev),
1760 "no target found at id %d",
1761 target_id);
1762 }
1763}
1764
1765/*
1766 * Sends a firmware asynchronous event to anyone who happens to be
1767 * listening on the defined ATTO VDA event ports.
1768 */
1769static void esas2r_send_ae_event(struct esas2r_fw_event_work *fw_event)
1770{
1771 struct esas2r_vda_ae *ae = (struct esas2r_vda_ae *)fw_event->data;
1772 char *type;
1773
1774 switch (ae->vda_ae.hdr.bytype) {
1775 case VDAAE_HDR_TYPE_RAID:
1776 type = "RAID group state change";
1777 break;
1778
1779 case VDAAE_HDR_TYPE_LU:
1780 type = "Mapped destination LU change";
1781 break;
1782
1783 case VDAAE_HDR_TYPE_DISK:
1784 type = "Physical disk inventory change";
1785 break;
1786
1787 case VDAAE_HDR_TYPE_RESET:
1788 type = "Firmware reset";
1789 break;
1790
1791 case VDAAE_HDR_TYPE_LOG_INFO:
1792 type = "Event Log message (INFO level)";
1793 break;
1794
1795 case VDAAE_HDR_TYPE_LOG_WARN:
1796 type = "Event Log message (WARN level)";
1797 break;
1798
1799 case VDAAE_HDR_TYPE_LOG_CRIT:
1800 type = "Event Log message (CRIT level)";
1801 break;
1802
1803 case VDAAE_HDR_TYPE_LOG_FAIL:
1804 type = "Event Log message (FAIL level)";
1805 break;
1806
1807 case VDAAE_HDR_TYPE_NVC:
1808 type = "NVCache change";
1809 break;
1810
1811 case VDAAE_HDR_TYPE_TLG_INFO:
1812 type = "Time stamped log message (INFO level)";
1813 break;
1814
1815 case VDAAE_HDR_TYPE_TLG_WARN:
1816 type = "Time stamped log message (WARN level)";
1817 break;
1818
1819 case VDAAE_HDR_TYPE_TLG_CRIT:
1820 type = "Time stamped log message (CRIT level)";
1821 break;
1822
1823 case VDAAE_HDR_TYPE_PWRMGT:
1824 type = "Power management";
1825 break;
1826
1827 case VDAAE_HDR_TYPE_MUTE:
1828 type = "Mute button pressed";
1829 break;
1830
1831 case VDAAE_HDR_TYPE_DEV:
1832 type = "Device attribute change";
1833 break;
1834
1835 default:
1836 type = "Unknown";
1837 break;
1838 }
1839
1840 esas2r_log(ESAS2R_LOG_WARN,
1841 "An async event of type \"%s\" was received from the firmware. The event contents are:",
1842 type);
1843 esas2r_log_hexdump(ESAS2R_LOG_WARN, &ae->vda_ae,
1844 ae->vda_ae.hdr.bylength);
1845
1846}
1847
1848static void
1849esas2r_firmware_event_work(struct work_struct *work)
1850{
1851 struct esas2r_fw_event_work *fw_event =
1852 container_of(work, struct esas2r_fw_event_work, work.work);
1853
1854 struct esas2r_adapter *a = fw_event->a;
1855
1856 u16 target_id = *(u16 *)&fw_event->data[0];
1857
1858 if (a->fw_events_off)
1859 goto done;
1860
1861 switch (fw_event->type) {
1862 case fw_event_null:
1863 break; /* do nothing */
1864
1865 case fw_event_lun_change:
1866 esas2r_remove_device(a, target_id);
1867 esas2r_add_device(a, target_id);
1868 break;
1869
1870 case fw_event_present:
1871 esas2r_add_device(a, target_id);
1872 break;
1873
1874 case fw_event_not_present:
1875 esas2r_remove_device(a, target_id);
1876 break;
1877
1878 case fw_event_vda_ae:
1879 esas2r_send_ae_event(fw_event);
1880 break;
1881 }
1882
1883done:
1884 esas2r_free_fw_event(fw_event);
1885}
1886
1887void esas2r_queue_fw_event(struct esas2r_adapter *a,
1888 enum fw_event_type type,
1889 void *data,
1890 int data_sz)
1891{
1892 struct esas2r_fw_event_work *fw_event;
1893 unsigned long flags;
1894
1895 fw_event = kzalloc(sizeof(struct esas2r_fw_event_work), GFP_ATOMIC);
1896 if (!fw_event) {
1897 esas2r_log(ESAS2R_LOG_WARN,
1898 "esas2r_queue_fw_event failed to alloc");
1899 return;
1900 }
1901
1902 if (type == fw_event_vda_ae) {
1903 struct esas2r_vda_ae *ae =
1904 (struct esas2r_vda_ae *)fw_event->data;
1905
1906 ae->signature = ESAS2R_VDA_EVENT_SIG;
1907 ae->bus_number = a->pcid->bus->number;
1908 ae->devfn = a->pcid->devfn;
1909 memcpy(&ae->vda_ae, data, sizeof(ae->vda_ae));
1910 } else {
1911 memcpy(fw_event->data, data, data_sz);
1912 }
1913
1914 fw_event->type = type;
1915 fw_event->a = a;
1916
1917 spin_lock_irqsave(&a->fw_event_lock, flags);
1918 list_add_tail(&fw_event->list, &a->fw_event_list);
1919 INIT_DELAYED_WORK(&fw_event->work, esas2r_firmware_event_work);
1920 queue_delayed_work_on(
1921 smp_processor_id(), a->fw_event_q, &fw_event->work,
1922 msecs_to_jiffies(1));
1923 spin_unlock_irqrestore(&a->fw_event_lock, flags);
1924}
1925
1926void esas2r_target_state_changed(struct esas2r_adapter *a, u16 targ_id,
1927 u8 state)
1928{
1929 if (state == TS_LUN_CHANGE)
1930 esas2r_queue_fw_event(a, fw_event_lun_change, &targ_id,
1931 sizeof(targ_id));
1932 else if (state == TS_PRESENT)
1933 esas2r_queue_fw_event(a, fw_event_present, &targ_id,
1934 sizeof(targ_id));
1935 else if (state == TS_NOT_PRESENT)
1936 esas2r_queue_fw_event(a, fw_event_not_present, &targ_id,
1937 sizeof(targ_id));
1938}
1939
1940/* Translate status to a Linux SCSI mid-layer error code */
1941int esas2r_req_status_to_error(u8 req_stat)
1942{
1943 switch (req_stat) {
1944 case RS_OVERRUN:
1945 case RS_UNDERRUN:
1946 case RS_SUCCESS:
1947 /*
1948 * NOTE: SCSI mid-layer wants a good status for a SCSI error, because
1949 * it will check the scsi_stat value in the completion anyway.
1950 */
1951 case RS_SCSI_ERROR:
1952 return DID_OK;
1953
1954 case RS_SEL:
1955 case RS_SEL2:
1956 return DID_NO_CONNECT;
1957
1958 case RS_RESET:
1959 return DID_RESET;
1960
1961 case RS_ABORTED:
1962 return DID_ABORT;
1963
1964 case RS_BUSY:
1965 return DID_BUS_BUSY;
1966 }
1967
1968 /* everything else is just an error. */
1969
1970 return DID_ERROR;
1971}
1972
1973module_init(esas2r_init);
1974module_exit(esas2r_exit);