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 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 device *dev = container_of(kobj,struct device,kobj);
68 	struct Scsi_Host *host = class_to_shost(dev);
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 __iomem *prbuffer;
89 		uint8_t __iomem *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 = 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 device *dev = container_of(kobj,struct device,kobj);
114 	struct Scsi_Host *host = class_to_shost(dev);
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 device *dev = container_of(kobj,struct device,kobj);
162 	struct Scsi_Host *host = class_to_shost(dev);
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_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 };
403