Merge branch 'linus' of master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa
[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 #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
63 arcmsr_sysfs_iop_message_read(struct kobject *kobj, char *buf, loff_t off,
64     size_t count)
65 {
66         struct class_device *cdev = container_of(kobj,struct class_device,kobj);
67         struct Scsi_Host *host = class_to_shost(cdev);
68         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
69         struct MessageUnit __iomem *reg = acb->pmu;
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 = (struct QBUFFER __iomem *)
89                                         &reg->message_rbuffer;
90                 uint8_t __iomem * iop_data = (uint8_t __iomem *)prbuffer->data;
91                 int32_t iop_len;
92
93                 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
94                 iop_len = readl(&prbuffer->data_len);
95                 while (iop_len > 0) {
96                         acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
97                         acb->rqbuf_lastindex++;
98                         acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
99                         iop_data++;
100                         iop_len--;
101                 }
102                 writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK,
103                                 &reg->inbound_doorbell);
104         }
105         return (allxfer_len);
106 }
107
108 static ssize_t
109 arcmsr_sysfs_iop_message_write(struct kobject *kobj, char *buf, loff_t off,
110     size_t count)
111 {
112         struct class_device *cdev = container_of(kobj,struct class_device,kobj);
113         struct Scsi_Host *host = class_to_shost(cdev);
114         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
115         int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
116         uint8_t *pQbuffer, *ptmpuserbuffer;
117
118         if (!capable(CAP_SYS_ADMIN))
119                 return -EACCES;
120         if (count > 1032)
121                 return -EINVAL;
122         /* do message unit write. */
123         ptmpuserbuffer = (uint8_t *)buf;
124         user_len = (int32_t)count;
125         wqbuf_lastindex = acb->wqbuf_lastindex;
126         wqbuf_firstindex = acb->wqbuf_firstindex;
127         if (wqbuf_lastindex != wqbuf_firstindex) {
128                 arcmsr_post_Qbuffer(acb);
129                 return 0;       /*need retry*/
130         } else {
131                 my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1)
132                                 &(ARCMSR_MAX_QBUFFER - 1);
133                 if (my_empty_len >= user_len) {
134                         while (user_len > 0) {
135                                 pQbuffer =
136                                 &acb->wqbuffer[acb->wqbuf_lastindex];
137                                 memcpy(pQbuffer, ptmpuserbuffer, 1);
138                                 acb->wqbuf_lastindex++;
139                                 acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
140                                 ptmpuserbuffer++;
141                                 user_len--;
142                         }
143                         if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
144                                 acb->acb_flags &=
145                                         ~ACB_F_MESSAGE_WQBUFFER_CLEARED;
146                                 arcmsr_post_Qbuffer(acb);
147                         }
148                         return count;
149                 } else {
150                         return 0;       /*need retry*/
151                 }
152         }
153 }
154
155 static ssize_t
156 arcmsr_sysfs_iop_message_clear(struct kobject *kobj, char *buf, loff_t off,
157     size_t count)
158 {
159         struct class_device *cdev = container_of(kobj,struct class_device,kobj);
160         struct Scsi_Host *host = class_to_shost(cdev);
161         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
162         struct MessageUnit __iomem *reg = acb->pmu;
163         uint8_t *pQbuffer;
164
165         if (!capable(CAP_SYS_ADMIN))
166                 return -EACCES;
167
168         if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
169                 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
170                 writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK
171                                 , &reg->inbound_doorbell);
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,
224                                 &arcmsr_sysfs_message_read_attr);
225         if (error) {
226                 printk(KERN_ERR "arcmsr: alloc sysfs mu_read failed\n");
227                 goto error_bin_file_message_read;
228         }
229         error = sysfs_create_bin_file(&host->shost_classdev.kobj,
230                                 &arcmsr_sysfs_message_write_attr);
231         if (error) {
232                 printk(KERN_ERR "arcmsr: alloc sysfs mu_write failed\n");
233                 goto error_bin_file_message_write;
234         }
235         error = sysfs_create_bin_file(&host->shost_classdev.kobj,
236                                 &arcmsr_sysfs_message_clear_attr);
237         if (error) {
238                 printk(KERN_ERR "arcmsr: alloc sysfs mu_clear failed\n");
239                 goto error_bin_file_message_clear;
240         }
241         return 0;
242 error_bin_file_message_clear:
243         sysfs_remove_bin_file(&host->shost_classdev.kobj,
244                                 &arcmsr_sysfs_message_write_attr);
245 error_bin_file_message_write:
246         sysfs_remove_bin_file(&host->shost_classdev.kobj,
247                                 &arcmsr_sysfs_message_read_attr);
248 error_bin_file_message_read:
249         return error;
250 }
251
252 void
253 arcmsr_free_sysfs_attr(struct AdapterControlBlock *acb) {
254         struct Scsi_Host *host = acb->host;
255
256         sysfs_remove_bin_file(&host->shost_classdev.kobj,
257                                 &arcmsr_sysfs_message_clear_attr);
258         sysfs_remove_bin_file(&host->shost_classdev.kobj,
259                                 &arcmsr_sysfs_message_write_attr);
260         sysfs_remove_bin_file(&host->shost_classdev.kobj,
261                                 &arcmsr_sysfs_message_read_attr);
262 }
263
264
265 static ssize_t
266 arcmsr_attr_host_driver_version(struct class_device *cdev, char *buf) {
267         return snprintf(buf, PAGE_SIZE,
268                         "%s\n",
269                         ARCMSR_DRIVER_VERSION);
270 }
271
272 static ssize_t
273 arcmsr_attr_host_driver_posted_cmd(struct class_device *cdev, char *buf) {
274         struct Scsi_Host *host = class_to_shost(cdev);
275         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
276         return snprintf(buf, PAGE_SIZE,
277                         "%4d\n",
278                         atomic_read(&acb->ccboutstandingcount));
279 }
280
281 static ssize_t
282 arcmsr_attr_host_driver_reset(struct class_device *cdev, char *buf) {
283         struct Scsi_Host *host = class_to_shost(cdev);
284         struct AdapterControlBlock *acb = (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 class_device *cdev, char *buf) {
292         struct Scsi_Host *host = class_to_shost(cdev);
293         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
294         return snprintf(buf, PAGE_SIZE,
295                         "%4d\n",
296                         acb->num_aborts);
297 }
298
299 static ssize_t
300 arcmsr_attr_host_fw_model(struct class_device *cdev, char *buf) {
301     struct Scsi_Host *host = class_to_shost(cdev);
302         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
303         return snprintf(buf, PAGE_SIZE,
304                         "%s\n",
305                         acb->firm_model);
306 }
307
308 static ssize_t
309 arcmsr_attr_host_fw_version(struct class_device *cdev, char *buf) {
310         struct Scsi_Host *host = class_to_shost(cdev);
311         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
312
313         return snprintf(buf, PAGE_SIZE,
314                         "%s\n",
315                         acb->firm_version);
316 }
317
318 static ssize_t
319 arcmsr_attr_host_fw_request_len(struct class_device *cdev, char *buf) {
320         struct Scsi_Host *host = class_to_shost(cdev);
321         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
322
323         return snprintf(buf, PAGE_SIZE,
324                         "%4d\n",
325                         acb->firm_request_len);
326 }
327
328 static ssize_t
329 arcmsr_attr_host_fw_numbers_queue(struct class_device *cdev, char *buf) {
330         struct Scsi_Host *host = class_to_shost(cdev);
331         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
332
333         return snprintf(buf, PAGE_SIZE,
334                         "%4d\n",
335                         acb->firm_numbers_queue);
336 }
337
338 static ssize_t
339 arcmsr_attr_host_fw_sdram_size(struct class_device *cdev, char *buf) {
340         struct Scsi_Host *host = class_to_shost(cdev);
341         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
342
343         return snprintf(buf, PAGE_SIZE,
344                         "%4d\n",
345                         acb->firm_sdram_size);
346 }
347
348 static ssize_t
349 arcmsr_attr_host_fw_hd_channels(struct class_device *cdev, char *buf) {
350         struct Scsi_Host *host = class_to_shost(cdev);
351         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
352
353         return snprintf(buf, PAGE_SIZE,
354                         "%4d\n",
355                         acb->firm_hd_channels);
356 }
357
358 static CLASS_DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL);
359 static CLASS_DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL);
360 static CLASS_DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL);
361 static CLASS_DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL);
362 static CLASS_DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL);
363 static CLASS_DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL);
364 static CLASS_DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL);
365 static CLASS_DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL);
366 static CLASS_DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL);
367 static CLASS_DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL);
368
369 struct class_device_attribute *arcmsr_host_attrs[] = {
370         &class_device_attr_host_driver_version,
371         &class_device_attr_host_driver_posted_cmd,
372         &class_device_attr_host_driver_reset,
373         &class_device_attr_host_driver_abort,
374         &class_device_attr_host_fw_model,
375         &class_device_attr_host_fw_version,
376         &class_device_attr_host_fw_request_len,
377         &class_device_attr_host_fw_numbers_queue,
378         &class_device_attr_host_fw_sdram_size,
379         &class_device_attr_host_fw_hd_channels,
380         NULL,
381 };