Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[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 class_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 class_device *cdev = container_of(kobj,struct class_device,kobj);
68         struct Scsi_Host *host = class_to_shost(cdev);
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 *prbuffer;
89                 uint8_t *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 = (uint8_t *)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 class_device *cdev = container_of(kobj,struct class_device,kobj);
114         struct Scsi_Host *host = class_to_shost(cdev);
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 class_device *cdev = container_of(kobj,struct class_device,kobj);
162         struct Scsi_Host *host = class_to_shost(cdev);
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_classdev.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_classdev.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_classdev.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_classdev.kobj, &arcmsr_sysfs_message_write_attr);
241 error_bin_file_message_write:
242         sysfs_remove_bin_file(&host->shost_classdev.kobj, &arcmsr_sysfs_message_read_attr);
243 error_bin_file_message_read:
244         return error;
245 }
246
247 void
248 arcmsr_free_sysfs_attr(struct AdapterControlBlock *acb) {
249         struct Scsi_Host *host = acb->host;
250
251         sysfs_remove_bin_file(&host->shost_classdev.kobj, &arcmsr_sysfs_message_clear_attr);
252         sysfs_remove_bin_file(&host->shost_classdev.kobj, &arcmsr_sysfs_message_write_attr);
253         sysfs_remove_bin_file(&host->shost_classdev.kobj, &arcmsr_sysfs_message_read_attr);
254 }
255
256
257 static ssize_t
258 arcmsr_attr_host_driver_version(struct class_device *cdev, char *buf) {
259         return snprintf(buf, PAGE_SIZE,
260                         "%s\n",
261                         ARCMSR_DRIVER_VERSION);
262 }
263
264 static ssize_t
265 arcmsr_attr_host_driver_posted_cmd(struct class_device *cdev, char *buf) {
266         struct Scsi_Host *host = class_to_shost(cdev);
267         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
268         return snprintf(buf, PAGE_SIZE,
269                         "%4d\n",
270                         atomic_read(&acb->ccboutstandingcount));
271 }
272
273 static ssize_t
274 arcmsr_attr_host_driver_reset(struct class_device *cdev, char *buf) {
275         struct Scsi_Host *host = class_to_shost(cdev);
276         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
277         return snprintf(buf, PAGE_SIZE,
278                         "%4d\n",
279                         acb->num_resets);
280 }
281
282 static ssize_t
283 arcmsr_attr_host_driver_abort(struct class_device *cdev, char *buf) {
284         struct Scsi_Host *host = class_to_shost(cdev);
285         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
286         return snprintf(buf, PAGE_SIZE,
287                         "%4d\n",
288                         acb->num_aborts);
289 }
290
291 static ssize_t
292 arcmsr_attr_host_fw_model(struct class_device *cdev, char *buf) {
293     struct Scsi_Host *host = class_to_shost(cdev);
294         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
295         return snprintf(buf, PAGE_SIZE,
296                         "%s\n",
297                         acb->firm_model);
298 }
299
300 static ssize_t
301 arcmsr_attr_host_fw_version(struct class_device *cdev, char *buf) {
302         struct Scsi_Host *host = class_to_shost(cdev);
303         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
304
305         return snprintf(buf, PAGE_SIZE,
306                         "%s\n",
307                         acb->firm_version);
308 }
309
310 static ssize_t
311 arcmsr_attr_host_fw_request_len(struct class_device *cdev, char *buf) {
312         struct Scsi_Host *host = class_to_shost(cdev);
313         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
314
315         return snprintf(buf, PAGE_SIZE,
316                         "%4d\n",
317                         acb->firm_request_len);
318 }
319
320 static ssize_t
321 arcmsr_attr_host_fw_numbers_queue(struct class_device *cdev, char *buf) {
322         struct Scsi_Host *host = class_to_shost(cdev);
323         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
324
325         return snprintf(buf, PAGE_SIZE,
326                         "%4d\n",
327                         acb->firm_numbers_queue);
328 }
329
330 static ssize_t
331 arcmsr_attr_host_fw_sdram_size(struct class_device *cdev, char *buf) {
332         struct Scsi_Host *host = class_to_shost(cdev);
333         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
334
335         return snprintf(buf, PAGE_SIZE,
336                         "%4d\n",
337                         acb->firm_sdram_size);
338 }
339
340 static ssize_t
341 arcmsr_attr_host_fw_hd_channels(struct class_device *cdev, char *buf) {
342         struct Scsi_Host *host = class_to_shost(cdev);
343         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
344
345         return snprintf(buf, PAGE_SIZE,
346                         "%4d\n",
347                         acb->firm_hd_channels);
348 }
349
350 static CLASS_DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL);
351 static CLASS_DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL);
352 static CLASS_DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL);
353 static CLASS_DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL);
354 static CLASS_DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL);
355 static CLASS_DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL);
356 static CLASS_DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL);
357 static CLASS_DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL);
358 static CLASS_DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL);
359 static CLASS_DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL);
360
361 struct class_device_attribute *arcmsr_host_attrs[] = {
362         &class_device_attr_host_driver_version,
363         &class_device_attr_host_driver_posted_cmd,
364         &class_device_attr_host_driver_reset,
365         &class_device_attr_host_driver_abort,
366         &class_device_attr_host_fw_model,
367         &class_device_attr_host_fw_version,
368         &class_device_attr_host_fw_request_len,
369         &class_device_attr_host_fw_numbers_queue,
370         &class_device_attr_host_fw_sdram_size,
371         &class_device_attr_host_fw_hd_channels,
372         NULL,
373 };