[SCSI] Add an 'Issue LIP' device attribute in fc_transport class
[linux-2.6.git] / drivers / scsi / qla2xxx / qla_attr.c
1 /*
2  * QLogic Fibre Channel HBA Driver
3  * Copyright (c)  2003-2005 QLogic Corporation
4  *
5  * See LICENSE.qla2xxx for copyright and licensing details.
6  */
7 #include "qla_def.h"
8
9 #include <linux/vmalloc.h>
10 #include <scsi/scsi_transport_fc.h>
11
12 /* SYSFS attributes --------------------------------------------------------- */
13
14 static ssize_t
15 qla2x00_sysfs_read_fw_dump(struct kobject *kobj, char *buf, loff_t off,
16     size_t count)
17 {
18         struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
19             struct device, kobj)));
20
21         if (ha->fw_dump_reading == 0)
22                 return 0;
23         if (off > ha->fw_dump_buffer_len)
24                 return 0;
25         if (off + count > ha->fw_dump_buffer_len)
26                 count = ha->fw_dump_buffer_len - off;
27
28         memcpy(buf, &ha->fw_dump_buffer[off], count);
29
30         return (count);
31 }
32
33 static ssize_t
34 qla2x00_sysfs_write_fw_dump(struct kobject *kobj, char *buf, loff_t off,
35     size_t count)
36 {
37         struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
38             struct device, kobj)));
39         int reading;
40         uint32_t dump_size;
41
42         if (off != 0)
43                 return (0);
44
45         reading = simple_strtol(buf, NULL, 10);
46         switch (reading) {
47         case 0:
48                 if (ha->fw_dump_reading == 1) {
49                         qla_printk(KERN_INFO, ha,
50                             "Firmware dump cleared on (%ld).\n",
51                             ha->host_no);
52
53                         vfree(ha->fw_dump_buffer);
54                         if (!IS_QLA24XX(ha) && !IS_QLA25XX(ha))
55                                 free_pages((unsigned long)ha->fw_dump,
56                                     ha->fw_dump_order);
57
58                         ha->fw_dump_reading = 0;
59                         ha->fw_dump_buffer = NULL;
60                         ha->fw_dump = NULL;
61                         ha->fw_dumped = 0;
62                 }
63                 break;
64         case 1:
65                 if ((ha->fw_dump || ha->fw_dumped) && !ha->fw_dump_reading) {
66                         ha->fw_dump_reading = 1;
67
68                         if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
69                                 dump_size = FW_DUMP_SIZE_24XX;
70                         else {
71                                 dump_size = FW_DUMP_SIZE_1M;
72                                 if (ha->fw_memory_size < 0x20000)
73                                         dump_size = FW_DUMP_SIZE_128K;
74                                 else if (ha->fw_memory_size < 0x80000)
75                                         dump_size = FW_DUMP_SIZE_512K;
76                         }
77                         ha->fw_dump_buffer = (char *)vmalloc(dump_size);
78                         if (ha->fw_dump_buffer == NULL) {
79                                 qla_printk(KERN_WARNING, ha,
80                                     "Unable to allocate memory for firmware "
81                                     "dump buffer (%d).\n", dump_size);
82
83                                 ha->fw_dump_reading = 0;
84                                 return (count);
85                         }
86                         qla_printk(KERN_INFO, ha,
87                             "Firmware dump ready for read on (%ld).\n",
88                             ha->host_no);
89                         memset(ha->fw_dump_buffer, 0, dump_size);
90                         ha->isp_ops.ascii_fw_dump(ha);
91                         ha->fw_dump_buffer_len = strlen(ha->fw_dump_buffer);
92                 }
93                 break;
94         }
95         return (count);
96 }
97
98 static struct bin_attribute sysfs_fw_dump_attr = {
99         .attr = {
100                 .name = "fw_dump",
101                 .mode = S_IRUSR | S_IWUSR,
102                 .owner = THIS_MODULE,
103         },
104         .size = 0,
105         .read = qla2x00_sysfs_read_fw_dump,
106         .write = qla2x00_sysfs_write_fw_dump,
107 };
108
109 static ssize_t
110 qla2x00_sysfs_read_nvram(struct kobject *kobj, char *buf, loff_t off,
111     size_t count)
112 {
113         struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
114             struct device, kobj)));
115         unsigned long   flags;
116
117         if (!capable(CAP_SYS_ADMIN) || off != 0 || count != ha->nvram_size)
118                 return 0;
119
120         /* Read NVRAM. */
121         spin_lock_irqsave(&ha->hardware_lock, flags);
122         ha->isp_ops.read_nvram(ha, (uint8_t *)buf, ha->nvram_base,
123             ha->nvram_size);
124         spin_unlock_irqrestore(&ha->hardware_lock, flags);
125
126         return (count);
127 }
128
129 static ssize_t
130 qla2x00_sysfs_write_nvram(struct kobject *kobj, char *buf, loff_t off,
131     size_t count)
132 {
133         struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
134             struct device, kobj)));
135         unsigned long   flags;
136         uint16_t        cnt;
137
138         if (!capable(CAP_SYS_ADMIN) || off != 0 || count != ha->nvram_size)
139                 return 0;
140
141         /* Checksum NVRAM. */
142         if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
143                 uint32_t *iter;
144                 uint32_t chksum;
145
146                 iter = (uint32_t *)buf;
147                 chksum = 0;
148                 for (cnt = 0; cnt < ((count >> 2) - 1); cnt++)
149                         chksum += le32_to_cpu(*iter++);
150                 chksum = ~chksum + 1;
151                 *iter = cpu_to_le32(chksum);
152         } else {
153                 uint8_t *iter;
154                 uint8_t chksum;
155
156                 iter = (uint8_t *)buf;
157                 chksum = 0;
158                 for (cnt = 0; cnt < count - 1; cnt++)
159                         chksum += *iter++;
160                 chksum = ~chksum + 1;
161                 *iter = chksum;
162         }
163
164         /* Write NVRAM. */
165         spin_lock_irqsave(&ha->hardware_lock, flags);
166         ha->isp_ops.write_nvram(ha, (uint8_t *)buf, ha->nvram_base, count);
167         spin_unlock_irqrestore(&ha->hardware_lock, flags);
168
169         return (count);
170 }
171
172 static struct bin_attribute sysfs_nvram_attr = {
173         .attr = {
174                 .name = "nvram",
175                 .mode = S_IRUSR | S_IWUSR,
176                 .owner = THIS_MODULE,
177         },
178         .size = 0,
179         .read = qla2x00_sysfs_read_nvram,
180         .write = qla2x00_sysfs_write_nvram,
181 };
182
183 void
184 qla2x00_alloc_sysfs_attr(scsi_qla_host_t *ha)
185 {
186         struct Scsi_Host *host = ha->host;
187
188         sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_fw_dump_attr);
189         sysfs_nvram_attr.size = ha->nvram_size;
190         sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_nvram_attr);
191 }
192
193 void
194 qla2x00_free_sysfs_attr(scsi_qla_host_t *ha)
195 {
196         struct Scsi_Host *host = ha->host;
197
198         sysfs_remove_bin_file(&host->shost_gendev.kobj, &sysfs_fw_dump_attr);
199         sysfs_remove_bin_file(&host->shost_gendev.kobj, &sysfs_nvram_attr);
200 }
201
202 /* Scsi_Host attributes. */
203
204 static ssize_t
205 qla2x00_drvr_version_show(struct class_device *cdev, char *buf)
206 {
207         return snprintf(buf, PAGE_SIZE, "%s\n", qla2x00_version_str);
208 }
209
210 static ssize_t
211 qla2x00_fw_version_show(struct class_device *cdev, char *buf)
212 {
213         scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
214         char fw_str[30];
215
216         return snprintf(buf, PAGE_SIZE, "%s\n",
217             ha->isp_ops.fw_version_str(ha, fw_str));
218 }
219
220 static ssize_t
221 qla2x00_serial_num_show(struct class_device *cdev, char *buf)
222 {
223         scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
224         uint32_t sn;
225
226         sn = ((ha->serial0 & 0x1f) << 16) | (ha->serial2 << 8) | ha->serial1;
227         return snprintf(buf, PAGE_SIZE, "%c%05d\n", 'A' + sn / 100000,
228             sn % 100000);
229 }
230
231 static ssize_t
232 qla2x00_isp_name_show(struct class_device *cdev, char *buf)
233 {
234         scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
235         return snprintf(buf, PAGE_SIZE, "%s\n", ha->brd_info->isp_name);
236 }
237
238 static ssize_t
239 qla2x00_isp_id_show(struct class_device *cdev, char *buf)
240 {
241         scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
242         return snprintf(buf, PAGE_SIZE, "%04x %04x %04x %04x\n",
243             ha->product_id[0], ha->product_id[1], ha->product_id[2],
244             ha->product_id[3]);
245 }
246
247 static ssize_t
248 qla2x00_model_name_show(struct class_device *cdev, char *buf)
249 {
250         scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
251         return snprintf(buf, PAGE_SIZE, "%s\n", ha->model_number);
252 }
253
254 static ssize_t
255 qla2x00_model_desc_show(struct class_device *cdev, char *buf)
256 {
257         scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
258         return snprintf(buf, PAGE_SIZE, "%s\n",
259             ha->model_desc ? ha->model_desc: "");
260 }
261
262 static ssize_t
263 qla2x00_pci_info_show(struct class_device *cdev, char *buf)
264 {
265         scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
266         char pci_info[30];
267
268         return snprintf(buf, PAGE_SIZE, "%s\n",
269             ha->isp_ops.pci_info_str(ha, pci_info));
270 }
271
272 static ssize_t
273 qla2x00_state_show(struct class_device *cdev, char *buf)
274 {
275         scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
276         int len = 0;
277
278         if (atomic_read(&ha->loop_state) == LOOP_DOWN ||
279             atomic_read(&ha->loop_state) == LOOP_DEAD)
280                 len = snprintf(buf, PAGE_SIZE, "Link Down\n");
281         else if (atomic_read(&ha->loop_state) != LOOP_READY ||
282             test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags) ||
283             test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags))
284                 len = snprintf(buf, PAGE_SIZE, "Unknown Link State\n");
285         else {
286                 len = snprintf(buf, PAGE_SIZE, "Link Up - ");
287
288                 switch (ha->current_topology) {
289                 case ISP_CFG_NL:
290                         len += snprintf(buf + len, PAGE_SIZE-len, "Loop\n");
291                         break;
292                 case ISP_CFG_FL:
293                         len += snprintf(buf + len, PAGE_SIZE-len, "FL_Port\n");
294                         break;
295                 case ISP_CFG_N:
296                         len += snprintf(buf + len, PAGE_SIZE-len,
297                             "N_Port to N_Port\n");
298                         break;
299                 case ISP_CFG_F:
300                         len += snprintf(buf + len, PAGE_SIZE-len, "F_Port\n");
301                         break;
302                 default:
303                         len += snprintf(buf + len, PAGE_SIZE-len, "Loop\n");
304                         break;
305                 }
306         }
307         return len;
308 }
309
310 static ssize_t
311 qla2x00_zio_show(struct class_device *cdev, char *buf)
312 {
313         scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
314         int len = 0;
315
316         switch (ha->zio_mode) {
317         case QLA_ZIO_MODE_5:
318                 len += snprintf(buf + len, PAGE_SIZE-len, "Mode 5\n");
319                 break;
320         case QLA_ZIO_MODE_6:
321                 len += snprintf(buf + len, PAGE_SIZE-len, "Mode 6\n");
322                 break;
323         case QLA_ZIO_DISABLED:
324                 len += snprintf(buf + len, PAGE_SIZE-len, "Disabled\n");
325                 break;
326         }
327         return len;
328 }
329
330 static ssize_t
331 qla2x00_zio_store(struct class_device *cdev, const char *buf, size_t count)
332 {
333         scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
334         int val = 0;
335         uint16_t zio_mode;
336
337         if (sscanf(buf, "%d", &val) != 1)
338                 return -EINVAL;
339
340         switch (val) {
341         case 1:
342                 zio_mode = QLA_ZIO_MODE_5;
343                 break;
344         case 2:
345                 zio_mode = QLA_ZIO_MODE_6;
346                 break;
347         default:
348                 zio_mode = QLA_ZIO_DISABLED;
349                 break;
350         }
351
352         /* Update per-hba values and queue a reset. */
353         if (zio_mode != QLA_ZIO_DISABLED || ha->zio_mode != QLA_ZIO_DISABLED) {
354                 ha->zio_mode = zio_mode;
355                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
356         }
357         return strlen(buf);
358 }
359
360 static ssize_t
361 qla2x00_zio_timer_show(struct class_device *cdev, char *buf)
362 {
363         scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
364
365         return snprintf(buf, PAGE_SIZE, "%d us\n", ha->zio_timer * 100);
366 }
367
368 static ssize_t
369 qla2x00_zio_timer_store(struct class_device *cdev, const char *buf,
370     size_t count)
371 {
372         scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
373         int val = 0;
374         uint16_t zio_timer;
375
376         if (sscanf(buf, "%d", &val) != 1)
377                 return -EINVAL;
378         if (val > 25500 || val < 100)
379                 return -ERANGE;
380
381         zio_timer = (uint16_t)(val / 100);
382         ha->zio_timer = zio_timer;
383
384         return strlen(buf);
385 }
386
387 static CLASS_DEVICE_ATTR(driver_version, S_IRUGO, qla2x00_drvr_version_show,
388         NULL);
389 static CLASS_DEVICE_ATTR(fw_version, S_IRUGO, qla2x00_fw_version_show, NULL);
390 static CLASS_DEVICE_ATTR(serial_num, S_IRUGO, qla2x00_serial_num_show, NULL);
391 static CLASS_DEVICE_ATTR(isp_name, S_IRUGO, qla2x00_isp_name_show, NULL);
392 static CLASS_DEVICE_ATTR(isp_id, S_IRUGO, qla2x00_isp_id_show, NULL);
393 static CLASS_DEVICE_ATTR(model_name, S_IRUGO, qla2x00_model_name_show, NULL);
394 static CLASS_DEVICE_ATTR(model_desc, S_IRUGO, qla2x00_model_desc_show, NULL);
395 static CLASS_DEVICE_ATTR(pci_info, S_IRUGO, qla2x00_pci_info_show, NULL);
396 static CLASS_DEVICE_ATTR(state, S_IRUGO, qla2x00_state_show, NULL);
397 static CLASS_DEVICE_ATTR(zio, S_IRUGO | S_IWUSR, qla2x00_zio_show,
398     qla2x00_zio_store);
399 static CLASS_DEVICE_ATTR(zio_timer, S_IRUGO | S_IWUSR, qla2x00_zio_timer_show,
400     qla2x00_zio_timer_store);
401
402 struct class_device_attribute *qla2x00_host_attrs[] = {
403         &class_device_attr_driver_version,
404         &class_device_attr_fw_version,
405         &class_device_attr_serial_num,
406         &class_device_attr_isp_name,
407         &class_device_attr_isp_id,
408         &class_device_attr_model_name,
409         &class_device_attr_model_desc,
410         &class_device_attr_pci_info,
411         &class_device_attr_state,
412         &class_device_attr_zio,
413         &class_device_attr_zio_timer,
414         NULL,
415 };
416
417 /* Host attributes. */
418
419 static void
420 qla2x00_get_host_port_id(struct Scsi_Host *shost)
421 {
422         scsi_qla_host_t *ha = to_qla_host(shost);
423
424         fc_host_port_id(shost) = ha->d_id.b.domain << 16 |
425             ha->d_id.b.area << 8 | ha->d_id.b.al_pa;
426 }
427
428 static void
429 qla2x00_get_starget_node_name(struct scsi_target *starget)
430 {
431         struct Scsi_Host *host = dev_to_shost(starget->dev.parent);
432         scsi_qla_host_t *ha = to_qla_host(host);
433         fc_port_t *fcport;
434         u64 node_name = 0;
435
436         list_for_each_entry(fcport, &ha->fcports, list) {
437                 if (starget->id == fcport->os_target_id) {
438                         node_name = wwn_to_u64(fcport->node_name);
439                         break;
440                 }
441         }
442
443         fc_starget_node_name(starget) = node_name;
444 }
445
446 static void
447 qla2x00_get_starget_port_name(struct scsi_target *starget)
448 {
449         struct Scsi_Host *host = dev_to_shost(starget->dev.parent);
450         scsi_qla_host_t *ha = to_qla_host(host);
451         fc_port_t *fcport;
452         u64 port_name = 0;
453
454         list_for_each_entry(fcport, &ha->fcports, list) {
455                 if (starget->id == fcport->os_target_id) {
456                         port_name = wwn_to_u64(fcport->port_name);
457                         break;
458                 }
459         }
460
461         fc_starget_port_name(starget) = port_name;
462 }
463
464 static void
465 qla2x00_get_starget_port_id(struct scsi_target *starget)
466 {
467         struct Scsi_Host *host = dev_to_shost(starget->dev.parent);
468         scsi_qla_host_t *ha = to_qla_host(host);
469         fc_port_t *fcport;
470         uint32_t port_id = ~0U;
471
472         list_for_each_entry(fcport, &ha->fcports, list) {
473                 if (starget->id == fcport->os_target_id) {
474                         port_id = fcport->d_id.b.domain << 16 |
475                             fcport->d_id.b.area << 8 | fcport->d_id.b.al_pa;
476                         break;
477                 }
478         }
479
480         fc_starget_port_id(starget) = port_id;
481 }
482
483 static void
484 qla2x00_get_rport_loss_tmo(struct fc_rport *rport)
485 {
486         struct Scsi_Host *host = rport_to_shost(rport);
487         scsi_qla_host_t *ha = to_qla_host(host);
488
489         rport->dev_loss_tmo = ha->port_down_retry_count + 5;
490 }
491
492 static void
493 qla2x00_set_rport_loss_tmo(struct fc_rport *rport, uint32_t timeout)
494 {
495         struct Scsi_Host *host = rport_to_shost(rport);
496         scsi_qla_host_t *ha = to_qla_host(host);
497
498         if (timeout)
499                 ha->port_down_retry_count = timeout;
500         else
501                 ha->port_down_retry_count = 1;
502
503         rport->dev_loss_tmo = ha->port_down_retry_count + 5;
504 }
505
506 static int
507 qla2x00_issue_lip(struct Scsi_Host *shost)
508 {
509         scsi_qla_host_t *ha = to_qla_host(shost);
510
511         set_bit(LOOP_RESET_NEEDED, &ha->dpc_flags);
512         return 0;
513 }
514
515 struct fc_function_template qla2xxx_transport_functions = {
516
517         .show_host_node_name = 1,
518         .show_host_port_name = 1,
519         .show_host_supported_classes = 1,
520
521         .get_host_port_id = qla2x00_get_host_port_id,
522         .show_host_port_id = 1,
523
524         .dd_fcrport_size = sizeof(struct fc_port *),
525         .show_rport_supported_classes = 1,
526
527         .get_starget_node_name = qla2x00_get_starget_node_name,
528         .show_starget_node_name = 1,
529         .get_starget_port_name = qla2x00_get_starget_port_name,
530         .show_starget_port_name = 1,
531         .get_starget_port_id  = qla2x00_get_starget_port_id,
532         .show_starget_port_id = 1,
533
534         .get_rport_dev_loss_tmo = qla2x00_get_rport_loss_tmo,
535         .set_rport_dev_loss_tmo = qla2x00_set_rport_loss_tmo,
536         .show_rport_dev_loss_tmo = 1,
537
538         .issue_fc_host_lip = qla2x00_issue_lip,
539 };
540
541 void
542 qla2x00_init_host_attr(scsi_qla_host_t *ha)
543 {
544         fc_host_node_name(ha->host) = wwn_to_u64(ha->init_cb->node_name);
545         fc_host_port_name(ha->host) = wwn_to_u64(ha->init_cb->port_name);
546         fc_host_supported_classes(ha->host) = FC_COS_CLASS3;
547 }