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authorErich Chen <erich@areca.com.tw>2006-07-12 11:59:32 -0400
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-07-28 15:13:40 -0400
commit1c57e86d75cf162bdadb3a5fe0cd3f65aa1a9ca3 (patch)
tree166f691c186d6e663218559c4762299063f63657 /drivers/scsi/arcmsr/arcmsr_attr.c
parent0c269e6d3c615403a6e0acbe6e88f1c0da9c2396 (diff)
[SCSI] arcmsr: initial driver, version 1.20.00.13
arcmsr is a driver for the Areca Raid controller, a host based RAID subsystem that speaks SCSI at the firmware level. This patch is quite a clean up over the initial submission with contributions from: Randy Dunlap <rdunlap@xenotime.net> Christoph Hellwig <hch@lst.de> Matthew Wilcox <matthew@wil.cx> Adrian Bunk <bunk@stusta.de> Signed-off-by: Erich Chen <erich@areca.com.tw> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/arcmsr/arcmsr_attr.c')
-rw-r--r--drivers/scsi/arcmsr/arcmsr_attr.c392
1 files changed, 392 insertions, 0 deletions
diff --git a/drivers/scsi/arcmsr/arcmsr_attr.c b/drivers/scsi/arcmsr/arcmsr_attr.c
new file mode 100644
index 000000000000..0459f4194d7c
--- /dev/null
+++ b/drivers/scsi/arcmsr/arcmsr_attr.c
@@ -0,0 +1,392 @@
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
60struct class_device_attribute *arcmsr_host_attrs[];
61
62static ssize_t
63arcmsr_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
108static ssize_t
109arcmsr_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
155static ssize_t
156arcmsr_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
188static 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
198static 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
208static 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
218int 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;
242error_bin_file_message_clear:
243 error = sysfs_remove_bin_file(&host->shost_classdev.kobj,
244 &arcmsr_sysfs_message_write_attr);
245 if (error)
246 printk(KERN_ERR "arcmsr: sysfs_remove_bin_file mu_write failed\n");
247error_bin_file_message_write:
248 error = sysfs_remove_bin_file(&host->shost_classdev.kobj,
249 &arcmsr_sysfs_message_read_attr);
250 if (error)
251 printk(KERN_ERR "arcmsr: sysfs_remove_bin_file mu_read failed\n");
252error_bin_file_message_read:
253 return error;
254}
255
256void
257arcmsr_free_sysfs_attr(struct AdapterControlBlock *acb) {
258 struct Scsi_Host *host = acb->host;
259 int error;
260
261 error = sysfs_remove_bin_file(&host->shost_classdev.kobj,
262 &arcmsr_sysfs_message_clear_attr);
263 if (error)
264 printk(KERN_ERR "arcmsr: free sysfs mu_clear failed\n");
265 error = sysfs_remove_bin_file(&host->shost_classdev.kobj,
266 &arcmsr_sysfs_message_write_attr);
267 if (error)
268 printk(KERN_ERR "arcmsr: free sysfs mu_write failed\n");
269 error = sysfs_remove_bin_file(&host->shost_classdev.kobj,
270 &arcmsr_sysfs_message_read_attr);
271 if (error)
272 printk(KERN_ERR "arcmsr: free sysfss mu_read failed\n");
273}
274
275
276static ssize_t
277arcmsr_attr_host_driver_version(struct class_device *cdev, char *buf) {
278 return snprintf(buf, PAGE_SIZE,
279 "ARCMSR: %s\n",
280 ARCMSR_DRIVER_VERSION);
281}
282
283static ssize_t
284arcmsr_attr_host_driver_posted_cmd(struct class_device *cdev, char *buf) {
285 struct Scsi_Host *host = class_to_shost(cdev);
286 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
287 return snprintf(buf, PAGE_SIZE,
288 "Current commands posted: %4d\n",
289 atomic_read(&acb->ccboutstandingcount));
290}
291
292static ssize_t
293arcmsr_attr_host_driver_reset(struct class_device *cdev, char *buf) {
294 struct Scsi_Host *host = class_to_shost(cdev);
295 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
296 return snprintf(buf, PAGE_SIZE,
297 "SCSI Host Resets: %4d\n",
298 acb->num_resets);
299}
300
301static ssize_t
302arcmsr_attr_host_driver_abort(struct class_device *cdev, char *buf) {
303 struct Scsi_Host *host = class_to_shost(cdev);
304 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
305 return snprintf(buf, PAGE_SIZE,
306 "SCSI Aborts/Timeouts: %4d\n",
307 acb->num_aborts);
308}
309
310static ssize_t
311arcmsr_attr_host_fw_model(struct class_device *cdev, char *buf) {
312 struct Scsi_Host *host = class_to_shost(cdev);
313 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
314 return snprintf(buf, PAGE_SIZE,
315 "Adapter Model: %s\n",
316 acb->firm_model);
317}
318
319static ssize_t
320arcmsr_attr_host_fw_version(struct class_device *cdev, char *buf) {
321 struct Scsi_Host *host = class_to_shost(cdev);
322 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
323
324 return snprintf(buf, PAGE_SIZE,
325 "Firmware Version: %s\n",
326 acb->firm_version);
327}
328
329static ssize_t
330arcmsr_attr_host_fw_request_len(struct class_device *cdev, char *buf) {
331 struct Scsi_Host *host = class_to_shost(cdev);
332 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
333
334 return snprintf(buf, PAGE_SIZE,
335 "Reguest Lenth: %4d\n",
336 acb->firm_request_len);
337}
338
339static ssize_t
340arcmsr_attr_host_fw_numbers_queue(struct class_device *cdev, char *buf) {
341 struct Scsi_Host *host = class_to_shost(cdev);
342 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
343
344 return snprintf(buf, PAGE_SIZE,
345 "Numbers of Queue: %4d\n",
346 acb->firm_numbers_queue);
347}
348
349static ssize_t
350arcmsr_attr_host_fw_sdram_size(struct class_device *cdev, char *buf) {
351 struct Scsi_Host *host = class_to_shost(cdev);
352 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
353
354 return snprintf(buf, PAGE_SIZE,
355 "SDRAM Size: %4d\n",
356 acb->firm_sdram_size);
357}
358
359static ssize_t
360arcmsr_attr_host_fw_hd_channels(struct class_device *cdev, char *buf) {
361 struct Scsi_Host *host = class_to_shost(cdev);
362 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
363
364 return snprintf(buf, PAGE_SIZE,
365 "Hard Disk Channels: %4d\n",
366 acb->firm_hd_channels);
367}
368
369static CLASS_DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL);
370static CLASS_DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL);
371static CLASS_DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL);
372static CLASS_DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL);
373static CLASS_DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL);
374static CLASS_DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL);
375static CLASS_DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL);
376static CLASS_DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL);
377static CLASS_DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL);
378static CLASS_DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL);
379
380struct class_device_attribute *arcmsr_host_attrs[] = {
381 &class_device_attr_host_driver_version,
382 &class_device_attr_host_driver_posted_cmd,
383 &class_device_attr_host_driver_reset,
384 &class_device_attr_host_driver_abort,
385 &class_device_attr_host_fw_model,
386 &class_device_attr_host_fw_version,
387 &class_device_attr_host_fw_request_len,
388 &class_device_attr_host_fw_numbers_queue,
389 &class_device_attr_host_fw_sdram_size,
390 &class_device_attr_host_fw_hd_channels,
391 NULL,
392};
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