[SCSI] scsi_dh: Implement common device table handling
[linux-2.6] / drivers / scsi / arcmsr / arcmsr_attr.c
1 /*
2 *******************************************************************************
3 **        O.S   : Linux
4 **   FILE NAME  : arcmsr_attr.c
5 **        BY    : Erich Chen
6 **   Description: attributes exported to sysfs and device host
7 *******************************************************************************
8 ** Copyright (C) 2002 - 2005, Areca Technology Corporation All rights reserved
9 **
10 **     Web site: www.areca.com.tw
11 **       E-mail: support@areca.com.tw
12 **
13 ** This program is free software; you can redistribute it and/or modify
14 ** it under the terms of the GNU General Public License version 2 as
15 ** published by the Free Software Foundation.
16 ** This program is distributed in the hope that it will be useful,
17 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19 ** GNU General Public License for more details.
20 *******************************************************************************
21 ** Redistribution and use in source and binary forms, with or without
22 ** modification, are permitted provided that the following conditions
23 ** are met:
24 ** 1. Redistributions of source code must retain the above copyright
25 **    notice, this list of conditions and the following disclaimer.
26 ** 2. Redistributions in binary form must reproduce the above copyright
27 **    notice, this list of conditions and the following disclaimer in the
28 **    documentation and/or other materials provided with the distribution.
29 ** 3. The name of the author may not be used to endorse or promote products
30 **    derived from this software without specific prior written permission.
31 **
32 ** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
33 ** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
34 ** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
35 ** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
36 ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES(INCLUDING,BUT
37 ** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
38 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION)HOWEVER CAUSED AND ON ANY
39 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
40 ** (INCLUDING NEGLIGENCE OR OTHERWISE)ARISING IN ANY WAY OUT OF THE USE OF
41 ** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 *******************************************************************************
43 ** For history of changes, see Documentation/scsi/ChangeLog.arcmsr
44 **     Firmware Specification, see Documentation/scsi/arcmsr_spec.txt
45 *******************************************************************************
46 */
47 #include <linux/module.h>
48 #include <linux/kernel.h>
49 #include <linux/init.h>
50 #include <linux/errno.h>
51 #include <linux/delay.h>
52 #include <linux/pci.h>
53
54 #include <scsi/scsi_cmnd.h>
55 #include <scsi/scsi_device.h>
56 #include <scsi/scsi_host.h>
57 #include <scsi/scsi_transport.h>
58 #include "arcmsr.h"
59
60 struct device_attribute *arcmsr_host_attrs[];
61
62 static ssize_t arcmsr_sysfs_iop_message_read(struct kobject *kobj,
63                                              struct bin_attribute *bin,
64                                              char *buf, loff_t off,
65                                              size_t count)
66 {
67         struct device *dev = container_of(kobj,struct device,kobj);
68         struct Scsi_Host *host = class_to_shost(dev);
69         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
70         uint8_t *pQbuffer,*ptmpQbuffer;
71         int32_t allxfer_len = 0;
72
73         if (!capable(CAP_SYS_ADMIN))
74                 return -EACCES;
75
76         /* do message unit read. */
77         ptmpQbuffer = (uint8_t *)buf;
78         while ((acb->rqbuf_firstindex != acb->rqbuf_lastindex)
79                 && (allxfer_len < 1031)) {
80                 pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
81                 memcpy(ptmpQbuffer, pQbuffer, 1);
82                 acb->rqbuf_firstindex++;
83                 acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
84                 ptmpQbuffer++;
85                 allxfer_len++;
86         }
87         if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
88                 struct QBUFFER __iomem *prbuffer;
89                 uint8_t __iomem *iop_data;
90                 int32_t iop_len;
91
92                 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
93                 prbuffer = arcmsr_get_iop_rqbuffer(acb);
94                 iop_data = prbuffer->data;
95                 iop_len = readl(&prbuffer->data_len);
96                 while (iop_len > 0) {
97                         acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
98                         acb->rqbuf_lastindex++;
99                         acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
100                         iop_data++;
101                         iop_len--;
102                 }
103                 arcmsr_iop_message_read(acb);
104         }
105         return (allxfer_len);
106 }
107
108 static ssize_t arcmsr_sysfs_iop_message_write(struct kobject *kobj,
109                                               struct bin_attribute *bin,
110                                               char *buf, loff_t off,
111                                               size_t count)
112 {
113         struct device *dev = container_of(kobj,struct device,kobj);
114         struct Scsi_Host *host = class_to_shost(dev);
115         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
116         int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
117         uint8_t *pQbuffer, *ptmpuserbuffer;
118
119         if (!capable(CAP_SYS_ADMIN))
120                 return -EACCES;
121         if (count > 1032)
122                 return -EINVAL;
123         /* do message unit write. */
124         ptmpuserbuffer = (uint8_t *)buf;
125         user_len = (int32_t)count;
126         wqbuf_lastindex = acb->wqbuf_lastindex;
127         wqbuf_firstindex = acb->wqbuf_firstindex;
128         if (wqbuf_lastindex != wqbuf_firstindex) {
129                 arcmsr_post_ioctldata2iop(acb);
130                 return 0;       /*need retry*/
131         } else {
132                 my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1)
133                                 &(ARCMSR_MAX_QBUFFER - 1);
134                 if (my_empty_len >= user_len) {
135                         while (user_len > 0) {
136                                 pQbuffer =
137                                 &acb->wqbuffer[acb->wqbuf_lastindex];
138                                 memcpy(pQbuffer, ptmpuserbuffer, 1);
139                                 acb->wqbuf_lastindex++;
140                                 acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
141                                 ptmpuserbuffer++;
142                                 user_len--;
143                         }
144                         if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
145                                 acb->acb_flags &=
146                                         ~ACB_F_MESSAGE_WQBUFFER_CLEARED;
147                                 arcmsr_post_ioctldata2iop(acb);
148                         }
149                         return count;
150                 } else {
151                         return 0;       /*need retry*/
152                 }
153         }
154 }
155
156 static ssize_t arcmsr_sysfs_iop_message_clear(struct kobject *kobj,
157                                               struct bin_attribute *bin,
158                                               char *buf, loff_t off,
159                                               size_t count)
160 {
161         struct device *dev = container_of(kobj,struct device,kobj);
162         struct Scsi_Host *host = class_to_shost(dev);
163         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
164         uint8_t *pQbuffer;
165
166         if (!capable(CAP_SYS_ADMIN))
167                 return -EACCES;
168
169         if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
170                 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
171                 arcmsr_iop_message_read(acb);
172         }
173         acb->acb_flags |=
174                 (ACB_F_MESSAGE_WQBUFFER_CLEARED
175                 | ACB_F_MESSAGE_RQBUFFER_CLEARED
176                 | ACB_F_MESSAGE_WQBUFFER_READED);
177         acb->rqbuf_firstindex = 0;
178         acb->rqbuf_lastindex = 0;
179         acb->wqbuf_firstindex = 0;
180         acb->wqbuf_lastindex = 0;
181         pQbuffer = acb->rqbuffer;
182         memset(pQbuffer, 0, sizeof (struct QBUFFER));
183         pQbuffer = acb->wqbuffer;
184         memset(pQbuffer, 0, sizeof (struct QBUFFER));
185         return 1;
186 }
187
188 static struct bin_attribute arcmsr_sysfs_message_read_attr = {
189         .attr = {
190                 .name = "mu_read",
191                 .mode = S_IRUSR ,
192                 .owner = THIS_MODULE,
193         },
194         .size = 1032,
195         .read = arcmsr_sysfs_iop_message_read,
196 };
197
198 static struct bin_attribute arcmsr_sysfs_message_write_attr = {
199         .attr = {
200                 .name = "mu_write",
201                 .mode = S_IWUSR,
202                 .owner = THIS_MODULE,
203         },
204         .size = 1032,
205         .write = arcmsr_sysfs_iop_message_write,
206 };
207
208 static struct bin_attribute arcmsr_sysfs_message_clear_attr = {
209         .attr = {
210                 .name = "mu_clear",
211                 .mode = S_IWUSR,
212                 .owner = THIS_MODULE,
213         },
214         .size = 1,
215         .write = arcmsr_sysfs_iop_message_clear,
216 };
217
218 int arcmsr_alloc_sysfs_attr(struct AdapterControlBlock *acb)
219 {
220         struct Scsi_Host *host = acb->host;
221         int error;
222
223         error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
224         if (error) {
225                 printk(KERN_ERR "arcmsr: alloc sysfs mu_read failed\n");
226                 goto error_bin_file_message_read;
227         }
228         error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
229         if (error) {
230                 printk(KERN_ERR "arcmsr: alloc sysfs mu_write failed\n");
231                 goto error_bin_file_message_write;
232         }
233         error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_clear_attr);
234         if (error) {
235                 printk(KERN_ERR "arcmsr: alloc sysfs mu_clear failed\n");
236                 goto error_bin_file_message_clear;
237         }
238         return 0;
239 error_bin_file_message_clear:
240         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
241 error_bin_file_message_write:
242         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
243 error_bin_file_message_read:
244         return error;
245 }
246
247 void arcmsr_free_sysfs_attr(struct AdapterControlBlock *acb)
248 {
249         struct Scsi_Host *host = acb->host;
250
251         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_clear_attr);
252         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
253         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
254 }
255
256
257 static ssize_t
258 arcmsr_attr_host_driver_version(struct device *dev,
259                                 struct device_attribute *attr, char *buf)
260 {
261         return snprintf(buf, PAGE_SIZE,
262                         "%s\n",
263                         ARCMSR_DRIVER_VERSION);
264 }
265
266 static ssize_t
267 arcmsr_attr_host_driver_posted_cmd(struct device *dev,
268                                    struct device_attribute *attr, char *buf)
269 {
270         struct Scsi_Host *host = class_to_shost(dev);
271         struct AdapterControlBlock *acb =
272                 (struct AdapterControlBlock *) host->hostdata;
273         return snprintf(buf, PAGE_SIZE,
274                         "%4d\n",
275                         atomic_read(&acb->ccboutstandingcount));
276 }
277
278 static ssize_t
279 arcmsr_attr_host_driver_reset(struct device *dev,
280                               struct device_attribute *attr, char *buf)
281 {
282         struct Scsi_Host *host = class_to_shost(dev);
283         struct AdapterControlBlock *acb =
284                 (struct AdapterControlBlock *) host->hostdata;
285         return snprintf(buf, PAGE_SIZE,
286                         "%4d\n",
287                         acb->num_resets);
288 }
289
290 static ssize_t
291 arcmsr_attr_host_driver_abort(struct device *dev,
292                               struct device_attribute *attr, char *buf)
293 {
294         struct Scsi_Host *host = class_to_shost(dev);
295         struct AdapterControlBlock *acb =
296                 (struct AdapterControlBlock *) host->hostdata;
297         return snprintf(buf, PAGE_SIZE,
298                         "%4d\n",
299                         acb->num_aborts);
300 }
301
302 static ssize_t
303 arcmsr_attr_host_fw_model(struct device *dev, struct device_attribute *attr,
304                           char *buf)
305 {
306         struct Scsi_Host *host = class_to_shost(dev);
307         struct AdapterControlBlock *acb =
308                 (struct AdapterControlBlock *) host->hostdata;
309         return snprintf(buf, PAGE_SIZE,
310                         "%s\n",
311                         acb->firm_model);
312 }
313
314 static ssize_t
315 arcmsr_attr_host_fw_version(struct device *dev,
316                             struct device_attribute *attr, char *buf)
317 {
318         struct Scsi_Host *host = class_to_shost(dev);
319         struct AdapterControlBlock *acb =
320                         (struct AdapterControlBlock *) host->hostdata;
321
322         return snprintf(buf, PAGE_SIZE,
323                         "%s\n",
324                         acb->firm_version);
325 }
326
327 static ssize_t
328 arcmsr_attr_host_fw_request_len(struct device *dev,
329                                 struct device_attribute *attr, char *buf)
330 {
331         struct Scsi_Host *host = class_to_shost(dev);
332         struct AdapterControlBlock *acb =
333                 (struct AdapterControlBlock *) host->hostdata;
334
335         return snprintf(buf, PAGE_SIZE,
336                         "%4d\n",
337                         acb->firm_request_len);
338 }
339
340 static ssize_t
341 arcmsr_attr_host_fw_numbers_queue(struct device *dev,
342                                   struct device_attribute *attr, char *buf)
343 {
344         struct Scsi_Host *host = class_to_shost(dev);
345         struct AdapterControlBlock *acb =
346                 (struct AdapterControlBlock *) host->hostdata;
347
348         return snprintf(buf, PAGE_SIZE,
349                         "%4d\n",
350                         acb->firm_numbers_queue);
351 }
352
353 static ssize_t
354 arcmsr_attr_host_fw_sdram_size(struct device *dev,
355                                struct device_attribute *attr, char *buf)
356 {
357         struct Scsi_Host *host = class_to_shost(dev);
358         struct AdapterControlBlock *acb =
359                 (struct AdapterControlBlock *) host->hostdata;
360
361         return snprintf(buf, PAGE_SIZE,
362                         "%4d\n",
363                         acb->firm_sdram_size);
364 }
365
366 static ssize_t
367 arcmsr_attr_host_fw_hd_channels(struct device *dev,
368                                 struct device_attribute *attr, char *buf)
369 {
370         struct Scsi_Host *host = class_to_shost(dev);
371         struct AdapterControlBlock *acb =
372                 (struct AdapterControlBlock *) host->hostdata;
373
374         return snprintf(buf, PAGE_SIZE,
375                         "%4d\n",
376                         acb->firm_hd_channels);
377 }
378
379 static DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL);
380 static DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL);
381 static DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL);
382 static DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL);
383 static DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL);
384 static DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL);
385 static DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL);
386 static DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL);
387 static DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL);
388 static DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL);
389
390 struct device_attribute *arcmsr_host_attrs[] = {
391         &dev_attr_host_driver_version,
392         &dev_attr_host_driver_posted_cmd,
393         &dev_attr_host_driver_reset,
394         &dev_attr_host_driver_abort,
395         &dev_attr_host_fw_model,
396         &dev_attr_host_fw_version,
397         &dev_attr_host_fw_request_len,
398         &dev_attr_host_fw_numbers_queue,
399         &dev_attr_host_fw_sdram_size,
400         &dev_attr_host_fw_hd_channels,
401         NULL,
402 };