Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw
[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: erich@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
53 #include <scsi/scsi_cmnd.h>
54 #include <scsi/scsi_device.h>
55 #include <scsi/scsi_host.h>
56 #include <scsi/scsi_transport.h>
57 #include "arcmsr.h"
58
59 struct class_device_attribute *arcmsr_host_attrs[];
60
61 static ssize_t
62 arcmsr_sysfs_iop_message_read(struct kobject *kobj, char *buf, loff_t off,
63     size_t count)
64 {
65         struct class_device *cdev = container_of(kobj,struct class_device,kobj);
66         struct Scsi_Host *host = class_to_shost(cdev);
67         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
68         struct MessageUnit __iomem *reg = acb->pmu;
69         uint8_t *pQbuffer,*ptmpQbuffer;
70         int32_t allxfer_len = 0;
71
72         if (!capable(CAP_SYS_ADMIN))
73                 return -EACCES;
74
75         /* do message unit read. */
76         ptmpQbuffer = (uint8_t *)buf;
77         while ((acb->rqbuf_firstindex != acb->rqbuf_lastindex)
78                 && (allxfer_len < 1031)) {
79                 pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
80                 memcpy(ptmpQbuffer, pQbuffer, 1);
81                 acb->rqbuf_firstindex++;
82                 acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
83                 ptmpQbuffer++;
84                 allxfer_len++;
85         }
86         if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
87                 struct QBUFFER __iomem * prbuffer = (struct QBUFFER __iomem *)
88                                         &reg->message_rbuffer;
89                 uint8_t __iomem * iop_data = (uint8_t __iomem *)prbuffer->data;
90                 int32_t iop_len;
91
92                 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
93                 iop_len = readl(&prbuffer->data_len);
94                 while (iop_len > 0) {
95                         acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
96                         acb->rqbuf_lastindex++;
97                         acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
98                         iop_data++;
99                         iop_len--;
100                 }
101                 writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK,
102                                 &reg->inbound_doorbell);
103         }
104         return (allxfer_len);
105 }
106
107 static ssize_t
108 arcmsr_sysfs_iop_message_write(struct kobject *kobj, char *buf, loff_t off,
109     size_t count)
110 {
111         struct class_device *cdev = container_of(kobj,struct class_device,kobj);
112         struct Scsi_Host *host = class_to_shost(cdev);
113         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
114         int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
115         uint8_t *pQbuffer, *ptmpuserbuffer;
116
117         if (!capable(CAP_SYS_ADMIN))
118                 return -EACCES;
119         if (count > 1032)
120                 return -EINVAL;
121         /* do message unit write. */
122         ptmpuserbuffer = (uint8_t *)buf;
123         user_len = (int32_t)count;
124         wqbuf_lastindex = acb->wqbuf_lastindex;
125         wqbuf_firstindex = acb->wqbuf_firstindex;
126         if (wqbuf_lastindex != wqbuf_firstindex) {
127                 arcmsr_post_Qbuffer(acb);
128                 return 0;       /*need retry*/
129         } else {
130                 my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1)
131                                 &(ARCMSR_MAX_QBUFFER - 1);
132                 if (my_empty_len >= user_len) {
133                         while (user_len > 0) {
134                                 pQbuffer =
135                                 &acb->wqbuffer[acb->wqbuf_lastindex];
136                                 memcpy(pQbuffer, ptmpuserbuffer, 1);
137                                 acb->wqbuf_lastindex++;
138                                 acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
139                                 ptmpuserbuffer++;
140                                 user_len--;
141                         }
142                         if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
143                                 acb->acb_flags &=
144                                         ~ACB_F_MESSAGE_WQBUFFER_CLEARED;
145                                 arcmsr_post_Qbuffer(acb);
146                         }
147                         return count;
148                 } else {
149                         return 0;       /*need retry*/
150                 }
151         }
152 }
153
154 static ssize_t
155 arcmsr_sysfs_iop_message_clear(struct kobject *kobj, char *buf, loff_t off,
156     size_t count)
157 {
158         struct class_device *cdev = container_of(kobj,struct class_device,kobj);
159         struct Scsi_Host *host = class_to_shost(cdev);
160         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
161         struct MessageUnit __iomem *reg = acb->pmu;
162         uint8_t *pQbuffer;
163
164         if (!capable(CAP_SYS_ADMIN))
165                 return -EACCES;
166
167         if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
168                 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
169                 writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK
170                                 , &reg->inbound_doorbell);
171         }
172         acb->acb_flags |=
173                 (ACB_F_MESSAGE_WQBUFFER_CLEARED
174                 | ACB_F_MESSAGE_RQBUFFER_CLEARED
175                 | ACB_F_MESSAGE_WQBUFFER_READED);
176         acb->rqbuf_firstindex = 0;
177         acb->rqbuf_lastindex = 0;
178         acb->wqbuf_firstindex = 0;
179         acb->wqbuf_lastindex = 0;
180         pQbuffer = acb->rqbuffer;
181         memset(pQbuffer, 0, sizeof (struct QBUFFER));
182         pQbuffer = acb->wqbuffer;
183         memset(pQbuffer, 0, sizeof (struct QBUFFER));
184         return 1;
185 }
186
187 static struct bin_attribute arcmsr_sysfs_message_read_attr = {
188         .attr = {
189                 .name = "mu_read",
190                 .mode = S_IRUSR ,
191                 .owner = THIS_MODULE,
192         },
193         .size = 1032,
194         .read = arcmsr_sysfs_iop_message_read,
195 };
196
197 static struct bin_attribute arcmsr_sysfs_message_write_attr = {
198         .attr = {
199                 .name = "mu_write",
200                 .mode = S_IWUSR,
201                 .owner = THIS_MODULE,
202         },
203         .size = 1032,
204         .write = arcmsr_sysfs_iop_message_write,
205 };
206
207 static struct bin_attribute arcmsr_sysfs_message_clear_attr = {
208         .attr = {
209                 .name = "mu_clear",
210                 .mode = S_IWUSR,
211                 .owner = THIS_MODULE,
212         },
213         .size = 1,
214         .write = arcmsr_sysfs_iop_message_clear,
215 };
216
217 int arcmsr_alloc_sysfs_attr(struct AdapterControlBlock *acb)
218 {
219         struct Scsi_Host *host = acb->host;
220         int error;
221
222         error = sysfs_create_bin_file(&host->shost_classdev.kobj,
223                                 &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,
229                                 &arcmsr_sysfs_message_write_attr);
230         if (error) {
231                 printk(KERN_ERR "arcmsr: alloc sysfs mu_write failed\n");
232                 goto error_bin_file_message_write;
233         }
234         error = sysfs_create_bin_file(&host->shost_classdev.kobj,
235                                 &arcmsr_sysfs_message_clear_attr);
236         if (error) {
237                 printk(KERN_ERR "arcmsr: alloc sysfs mu_clear failed\n");
238                 goto error_bin_file_message_clear;
239         }
240         return 0;
241 error_bin_file_message_clear:
242         sysfs_remove_bin_file(&host->shost_classdev.kobj,
243                                 &arcmsr_sysfs_message_write_attr);
244 error_bin_file_message_write:
245         sysfs_remove_bin_file(&host->shost_classdev.kobj,
246                                 &arcmsr_sysfs_message_read_attr);
247 error_bin_file_message_read:
248         return error;
249 }
250
251 void
252 arcmsr_free_sysfs_attr(struct AdapterControlBlock *acb) {
253         struct Scsi_Host *host = acb->host;
254
255         sysfs_remove_bin_file(&host->shost_classdev.kobj,
256                                 &arcmsr_sysfs_message_clear_attr);
257         sysfs_remove_bin_file(&host->shost_classdev.kobj,
258                                 &arcmsr_sysfs_message_write_attr);
259         sysfs_remove_bin_file(&host->shost_classdev.kobj,
260                                 &arcmsr_sysfs_message_read_attr);
261 }
262
263
264 static ssize_t
265 arcmsr_attr_host_driver_version(struct class_device *cdev, char *buf) {
266         return snprintf(buf, PAGE_SIZE,
267                         "%s\n",
268                         ARCMSR_DRIVER_VERSION);
269 }
270
271 static ssize_t
272 arcmsr_attr_host_driver_posted_cmd(struct class_device *cdev, char *buf) {
273         struct Scsi_Host *host = class_to_shost(cdev);
274         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
275         return snprintf(buf, PAGE_SIZE,
276                         "%4d\n",
277                         atomic_read(&acb->ccboutstandingcount));
278 }
279
280 static ssize_t
281 arcmsr_attr_host_driver_reset(struct class_device *cdev, char *buf) {
282         struct Scsi_Host *host = class_to_shost(cdev);
283         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
284         return snprintf(buf, PAGE_SIZE,
285                         "%4d\n",
286                         acb->num_resets);
287 }
288
289 static ssize_t
290 arcmsr_attr_host_driver_abort(struct class_device *cdev, char *buf) {
291         struct Scsi_Host *host = class_to_shost(cdev);
292         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
293         return snprintf(buf, PAGE_SIZE,
294                         "%4d\n",
295                         acb->num_aborts);
296 }
297
298 static ssize_t
299 arcmsr_attr_host_fw_model(struct class_device *cdev, char *buf) {
300     struct Scsi_Host *host = class_to_shost(cdev);
301         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
302         return snprintf(buf, PAGE_SIZE,
303                         "%s\n",
304                         acb->firm_model);
305 }
306
307 static ssize_t
308 arcmsr_attr_host_fw_version(struct class_device *cdev, char *buf) {
309         struct Scsi_Host *host = class_to_shost(cdev);
310         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
311
312         return snprintf(buf, PAGE_SIZE,
313                         "%s\n",
314                         acb->firm_version);
315 }
316
317 static ssize_t
318 arcmsr_attr_host_fw_request_len(struct class_device *cdev, char *buf) {
319         struct Scsi_Host *host = class_to_shost(cdev);
320         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
321
322         return snprintf(buf, PAGE_SIZE,
323                         "%4d\n",
324                         acb->firm_request_len);
325 }
326
327 static ssize_t
328 arcmsr_attr_host_fw_numbers_queue(struct class_device *cdev, char *buf) {
329         struct Scsi_Host *host = class_to_shost(cdev);
330         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
331
332         return snprintf(buf, PAGE_SIZE,
333                         "%4d\n",
334                         acb->firm_numbers_queue);
335 }
336
337 static ssize_t
338 arcmsr_attr_host_fw_sdram_size(struct class_device *cdev, char *buf) {
339         struct Scsi_Host *host = class_to_shost(cdev);
340         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
341
342         return snprintf(buf, PAGE_SIZE,
343                         "%4d\n",
344                         acb->firm_sdram_size);
345 }
346
347 static ssize_t
348 arcmsr_attr_host_fw_hd_channels(struct class_device *cdev, char *buf) {
349         struct Scsi_Host *host = class_to_shost(cdev);
350         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
351
352         return snprintf(buf, PAGE_SIZE,
353                         "%4d\n",
354                         acb->firm_hd_channels);
355 }
356
357 static CLASS_DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL);
358 static CLASS_DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL);
359 static CLASS_DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL);
360 static CLASS_DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL);
361 static CLASS_DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL);
362 static CLASS_DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL);
363 static CLASS_DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL);
364 static CLASS_DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL);
365 static CLASS_DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL);
366 static CLASS_DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL);
367
368 struct class_device_attribute *arcmsr_host_attrs[] = {
369         &class_device_attr_host_driver_version,
370         &class_device_attr_host_driver_posted_cmd,
371         &class_device_attr_host_driver_reset,
372         &class_device_attr_host_driver_abort,
373         &class_device_attr_host_fw_model,
374         &class_device_attr_host_fw_version,
375         &class_device_attr_host_fw_request_len,
376         &class_device_attr_host_fw_numbers_queue,
377         &class_device_attr_host_fw_sdram_size,
378         &class_device_attr_host_fw_hd_channels,
379         NULL,
380 };