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arcmsr_attr.c
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1 /*
2 *******************************************************************************
3 ** O.S : Linux
4 ** FILE NAME : arcmsr_attr.c
5 ** BY : Nick Cheng
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: [email protected]
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 file *filp,
63  struct kobject *kobj,
64  struct bin_attribute *bin,
65  char *buf, loff_t off,
66  size_t count)
67 {
68  struct device *dev = container_of(kobj,struct device,kobj);
69  struct Scsi_Host *host = class_to_shost(dev);
70  struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
71  uint8_t *pQbuffer,*ptmpQbuffer;
72  int32_t allxfer_len = 0;
73 
74  if (!capable(CAP_SYS_ADMIN))
75  return -EACCES;
76 
77  /* do message unit read. */
78  ptmpQbuffer = (uint8_t *)buf;
79  while ((acb->rqbuf_firstindex != acb->rqbuf_lastindex)
80  && (allxfer_len < 1031)) {
81  pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
82  memcpy(ptmpQbuffer, pQbuffer, 1);
83  acb->rqbuf_firstindex++;
84  acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
85  ptmpQbuffer++;
86  allxfer_len++;
87  }
88  if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
89  struct QBUFFER __iomem *prbuffer;
90  uint8_t __iomem *iop_data;
91  int32_t iop_len;
92 
93  acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
94  prbuffer = arcmsr_get_iop_rqbuffer(acb);
95  iop_data = prbuffer->data;
96  iop_len = readl(&prbuffer->data_len);
97  while (iop_len > 0) {
98  acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
99  acb->rqbuf_lastindex++;
100  acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
101  iop_data++;
102  iop_len--;
103  }
104  arcmsr_iop_message_read(acb);
105  }
106  return (allxfer_len);
107 }
108 
109 static ssize_t arcmsr_sysfs_iop_message_write(struct file *filp,
110  struct kobject *kobj,
111  struct bin_attribute *bin,
112  char *buf, loff_t off,
113  size_t count)
114 {
115  struct device *dev = container_of(kobj,struct device,kobj);
116  struct Scsi_Host *host = class_to_shost(dev);
117  struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
118  int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
119  uint8_t *pQbuffer, *ptmpuserbuffer;
120 
121  if (!capable(CAP_SYS_ADMIN))
122  return -EACCES;
123  if (count > 1032)
124  return -EINVAL;
125  /* do message unit write. */
126  ptmpuserbuffer = (uint8_t *)buf;
127  user_len = (int32_t)count;
128  wqbuf_lastindex = acb->wqbuf_lastindex;
129  wqbuf_firstindex = acb->wqbuf_firstindex;
130  if (wqbuf_lastindex != wqbuf_firstindex) {
131  arcmsr_post_ioctldata2iop(acb);
132  return 0; /*need retry*/
133  } else {
134  my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1)
135  &(ARCMSR_MAX_QBUFFER - 1);
136  if (my_empty_len >= user_len) {
137  while (user_len > 0) {
138  pQbuffer =
139  &acb->wqbuffer[acb->wqbuf_lastindex];
140  memcpy(pQbuffer, ptmpuserbuffer, 1);
141  acb->wqbuf_lastindex++;
142  acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
143  ptmpuserbuffer++;
144  user_len--;
145  }
146  if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
147  acb->acb_flags &=
148  ~ACB_F_MESSAGE_WQBUFFER_CLEARED;
149  arcmsr_post_ioctldata2iop(acb);
150  }
151  return count;
152  } else {
153  return 0; /*need retry*/
154  }
155  }
156 }
157 
158 static ssize_t arcmsr_sysfs_iop_message_clear(struct file *filp,
159  struct kobject *kobj,
160  struct bin_attribute *bin,
161  char *buf, loff_t off,
162  size_t count)
163 {
164  struct device *dev = container_of(kobj,struct device,kobj);
165  struct Scsi_Host *host = class_to_shost(dev);
166  struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
167  uint8_t *pQbuffer;
168 
169  if (!capable(CAP_SYS_ADMIN))
170  return -EACCES;
171 
172  if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
173  acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
174  arcmsr_iop_message_read(acb);
175  }
176  acb->acb_flags |=
177  (ACB_F_MESSAGE_WQBUFFER_CLEARED
178  | ACB_F_MESSAGE_RQBUFFER_CLEARED
179  | ACB_F_MESSAGE_WQBUFFER_READED);
180  acb->rqbuf_firstindex = 0;
181  acb->rqbuf_lastindex = 0;
182  acb->wqbuf_firstindex = 0;
183  acb->wqbuf_lastindex = 0;
184  pQbuffer = acb->rqbuffer;
185  memset(pQbuffer, 0, sizeof (struct QBUFFER));
186  pQbuffer = acb->wqbuffer;
187  memset(pQbuffer, 0, sizeof (struct QBUFFER));
188  return 1;
189 }
190 
191 static struct bin_attribute arcmsr_sysfs_message_read_attr = {
192  .attr = {
193  .name = "mu_read",
194  .mode = S_IRUSR ,
195  },
196  .size = 1032,
197  .read = arcmsr_sysfs_iop_message_read,
198 };
199 
200 static struct bin_attribute arcmsr_sysfs_message_write_attr = {
201  .attr = {
202  .name = "mu_write",
203  .mode = S_IWUSR,
204  },
205  .size = 1032,
206  .write = arcmsr_sysfs_iop_message_write,
207 };
208 
209 static struct bin_attribute arcmsr_sysfs_message_clear_attr = {
210  .attr = {
211  .name = "mu_clear",
212  .mode = S_IWUSR,
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 };
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