Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Parallel SCSI (SPI) transport specific attributes exported to sysfs. | |
3 | * | |
4 | * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. | |
5 | * Copyright (c) 2004, 2005 James Bottomley <James.Bottomley@SteelEye.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #include <linux/ctype.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/workqueue.h> | |
949bf797 | 25 | #include <linux/blkdev.h> |
d158d261 | 26 | #include <linux/mutex.h> |
1da177e4 LT |
27 | #include <scsi/scsi.h> |
28 | #include "scsi_priv.h" | |
29 | #include <scsi/scsi_device.h> | |
30 | #include <scsi/scsi_host.h> | |
33aa687d | 31 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
32 | #include <scsi/scsi_eh.h> |
33 | #include <scsi/scsi_transport.h> | |
34 | #include <scsi/scsi_transport_spi.h> | |
35 | ||
d872ebe4 | 36 | #define SPI_NUM_ATTRS 14 /* increase this if you add attributes */ |
1da177e4 LT |
37 | #define SPI_OTHER_ATTRS 1 /* Increase this if you add "always |
38 | * on" attributes */ | |
39 | #define SPI_HOST_ATTRS 1 | |
40 | ||
41 | #define SPI_MAX_ECHO_BUFFER_SIZE 4096 | |
42 | ||
949bf797 JB |
43 | #define DV_LOOPS 3 |
44 | #define DV_TIMEOUT (10*HZ) | |
45 | #define DV_RETRIES 3 /* should only need at most | |
46 | * two cc/ua clears */ | |
47 | ||
1da177e4 | 48 | /* Private data accessors (keep these out of the header file) */ |
dfdc58ba | 49 | #define spi_dv_in_progress(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_in_progress) |
d158d261 | 50 | #define spi_dv_mutex(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_mutex) |
1da177e4 LT |
51 | |
52 | struct spi_internal { | |
53 | struct scsi_transport_template t; | |
54 | struct spi_function_template *f; | |
1da177e4 LT |
55 | }; |
56 | ||
57 | #define to_spi_internal(tmpl) container_of(tmpl, struct spi_internal, t) | |
58 | ||
59 | static const int ppr_to_ps[] = { | |
60 | /* The PPR values 0-6 are reserved, fill them in when | |
61 | * the committee defines them */ | |
62 | -1, /* 0x00 */ | |
63 | -1, /* 0x01 */ | |
64 | -1, /* 0x02 */ | |
65 | -1, /* 0x03 */ | |
66 | -1, /* 0x04 */ | |
67 | -1, /* 0x05 */ | |
68 | -1, /* 0x06 */ | |
69 | 3125, /* 0x07 */ | |
70 | 6250, /* 0x08 */ | |
71 | 12500, /* 0x09 */ | |
72 | 25000, /* 0x0a */ | |
73 | 30300, /* 0x0b */ | |
74 | 50000, /* 0x0c */ | |
75 | }; | |
76 | /* The PPR values at which you calculate the period in ns by multiplying | |
77 | * by 4 */ | |
78 | #define SPI_STATIC_PPR 0x0c | |
79 | ||
80 | static int sprint_frac(char *dest, int value, int denom) | |
81 | { | |
82 | int frac = value % denom; | |
83 | int result = sprintf(dest, "%d", value / denom); | |
84 | ||
85 | if (frac == 0) | |
86 | return result; | |
87 | dest[result++] = '.'; | |
88 | ||
89 | do { | |
90 | denom /= 10; | |
91 | sprintf(dest + result, "%d", frac / denom); | |
92 | result++; | |
93 | frac %= denom; | |
94 | } while (frac); | |
95 | ||
96 | dest[result++] = '\0'; | |
97 | return result; | |
98 | } | |
99 | ||
33aa687d JB |
100 | static int spi_execute(struct scsi_device *sdev, const void *cmd, |
101 | enum dma_data_direction dir, | |
102 | void *buffer, unsigned bufflen, | |
103 | struct scsi_sense_hdr *sshdr) | |
949bf797 | 104 | { |
33aa687d JB |
105 | int i, result; |
106 | unsigned char sense[SCSI_SENSE_BUFFERSIZE]; | |
949bf797 JB |
107 | |
108 | for(i = 0; i < DV_RETRIES; i++) { | |
33aa687d JB |
109 | result = scsi_execute(sdev, cmd, dir, buffer, bufflen, |
110 | sense, DV_TIMEOUT, /* retries */ 1, | |
111 | REQ_FAILFAST); | |
112 | if (result & DRIVER_SENSE) { | |
113 | struct scsi_sense_hdr sshdr_tmp; | |
114 | if (!sshdr) | |
115 | sshdr = &sshdr_tmp; | |
116 | ||
4ed381ee | 117 | if (scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, |
33aa687d JB |
118 | sshdr) |
119 | && sshdr->sense_key == UNIT_ATTENTION) | |
949bf797 JB |
120 | continue; |
121 | } | |
122 | break; | |
123 | } | |
33aa687d | 124 | return result; |
949bf797 JB |
125 | } |
126 | ||
1da177e4 LT |
127 | static struct { |
128 | enum spi_signal_type value; | |
129 | char *name; | |
130 | } signal_types[] = { | |
131 | { SPI_SIGNAL_UNKNOWN, "unknown" }, | |
132 | { SPI_SIGNAL_SE, "SE" }, | |
133 | { SPI_SIGNAL_LVD, "LVD" }, | |
134 | { SPI_SIGNAL_HVD, "HVD" }, | |
135 | }; | |
136 | ||
137 | static inline const char *spi_signal_to_string(enum spi_signal_type type) | |
138 | { | |
139 | int i; | |
140 | ||
6391a113 | 141 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
1da177e4 LT |
142 | if (type == signal_types[i].value) |
143 | return signal_types[i].name; | |
144 | } | |
145 | return NULL; | |
146 | } | |
147 | static inline enum spi_signal_type spi_signal_to_value(const char *name) | |
148 | { | |
149 | int i, len; | |
150 | ||
6391a113 | 151 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
1da177e4 LT |
152 | len = strlen(signal_types[i].name); |
153 | if (strncmp(name, signal_types[i].name, len) == 0 && | |
154 | (name[len] == '\n' || name[len] == '\0')) | |
155 | return signal_types[i].value; | |
156 | } | |
157 | return SPI_SIGNAL_UNKNOWN; | |
158 | } | |
159 | ||
d0a7e574 | 160 | static int spi_host_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 161 | struct device *cdev) |
1da177e4 LT |
162 | { |
163 | struct Scsi_Host *shost = dev_to_shost(dev); | |
164 | ||
165 | spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
9b161a4d JB |
170 | static int spi_host_configure(struct transport_container *tc, |
171 | struct device *dev, | |
ee959b00 | 172 | struct device *cdev); |
9b161a4d | 173 | |
1da177e4 LT |
174 | static DECLARE_TRANSPORT_CLASS(spi_host_class, |
175 | "spi_host", | |
176 | spi_host_setup, | |
177 | NULL, | |
9b161a4d | 178 | spi_host_configure); |
1da177e4 LT |
179 | |
180 | static int spi_host_match(struct attribute_container *cont, | |
181 | struct device *dev) | |
182 | { | |
183 | struct Scsi_Host *shost; | |
1da177e4 LT |
184 | |
185 | if (!scsi_is_host_device(dev)) | |
186 | return 0; | |
187 | ||
188 | shost = dev_to_shost(dev); | |
189 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
190 | != &spi_host_class.class) | |
191 | return 0; | |
192 | ||
9b161a4d | 193 | return &shost->transportt->host_attrs.ac == cont; |
1da177e4 LT |
194 | } |
195 | ||
9b161a4d JB |
196 | static int spi_target_configure(struct transport_container *tc, |
197 | struct device *dev, | |
ee959b00 | 198 | struct device *cdev); |
9b161a4d | 199 | |
d0a7e574 JB |
200 | static int spi_device_configure(struct transport_container *tc, |
201 | struct device *dev, | |
ee959b00 | 202 | struct device *cdev) |
1da177e4 LT |
203 | { |
204 | struct scsi_device *sdev = to_scsi_device(dev); | |
205 | struct scsi_target *starget = sdev->sdev_target; | |
206 | ||
207 | /* Populate the target capability fields with the values | |
208 | * gleaned from the device inquiry */ | |
209 | ||
210 | spi_support_sync(starget) = scsi_device_sync(sdev); | |
211 | spi_support_wide(starget) = scsi_device_wide(sdev); | |
212 | spi_support_dt(starget) = scsi_device_dt(sdev); | |
213 | spi_support_dt_only(starget) = scsi_device_dt_only(sdev); | |
214 | spi_support_ius(starget) = scsi_device_ius(sdev); | |
215 | spi_support_qas(starget) = scsi_device_qas(sdev); | |
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
d0a7e574 JB |
220 | static int spi_setup_transport_attrs(struct transport_container *tc, |
221 | struct device *dev, | |
ee959b00 | 222 | struct device *cdev) |
1da177e4 LT |
223 | { |
224 | struct scsi_target *starget = to_scsi_target(dev); | |
225 | ||
226 | spi_period(starget) = -1; /* illegal value */ | |
62a86129 | 227 | spi_min_period(starget) = 0; |
1da177e4 | 228 | spi_offset(starget) = 0; /* async */ |
62a86129 | 229 | spi_max_offset(starget) = 255; |
1da177e4 | 230 | spi_width(starget) = 0; /* narrow */ |
62a86129 | 231 | spi_max_width(starget) = 1; |
1da177e4 LT |
232 | spi_iu(starget) = 0; /* no IU */ |
233 | spi_dt(starget) = 0; /* ST */ | |
234 | spi_qas(starget) = 0; | |
235 | spi_wr_flow(starget) = 0; | |
236 | spi_rd_strm(starget) = 0; | |
237 | spi_rti(starget) = 0; | |
238 | spi_pcomp_en(starget) = 0; | |
d872ebe4 | 239 | spi_hold_mcs(starget) = 0; |
1da177e4 | 240 | spi_dv_pending(starget) = 0; |
dfdc58ba | 241 | spi_dv_in_progress(starget) = 0; |
1da177e4 | 242 | spi_initial_dv(starget) = 0; |
d158d261 | 243 | mutex_init(&spi_dv_mutex(starget)); |
1da177e4 LT |
244 | |
245 | return 0; | |
246 | } | |
247 | ||
62a86129 JB |
248 | #define spi_transport_show_simple(field, format_string) \ |
249 | \ | |
250 | static ssize_t \ | |
ee959b00 TJ |
251 | show_spi_transport_##field(struct device *dev, \ |
252 | struct device_attribute *attr, char *buf) \ | |
62a86129 | 253 | { \ |
ee959b00 | 254 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
255 | struct spi_transport_attrs *tp; \ |
256 | \ | |
257 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
258 | return snprintf(buf, 20, format_string, tp->field); \ | |
259 | } | |
260 | ||
261 | #define spi_transport_store_simple(field, format_string) \ | |
262 | \ | |
263 | static ssize_t \ | |
ee959b00 TJ |
264 | store_spi_transport_##field(struct device *dev, \ |
265 | struct device_attribute *attr, \ | |
266 | const char *buf, size_t count) \ | |
62a86129 JB |
267 | { \ |
268 | int val; \ | |
ee959b00 | 269 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
270 | struct spi_transport_attrs *tp; \ |
271 | \ | |
272 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
273 | val = simple_strtoul(buf, NULL, 0); \ | |
274 | tp->field = val; \ | |
275 | return count; \ | |
276 | } | |
277 | ||
1da177e4 LT |
278 | #define spi_transport_show_function(field, format_string) \ |
279 | \ | |
280 | static ssize_t \ | |
ee959b00 TJ |
281 | show_spi_transport_##field(struct device *dev, \ |
282 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 283 | { \ |
ee959b00 | 284 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
285 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
286 | struct spi_transport_attrs *tp; \ | |
287 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
288 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
289 | if (i->f->get_##field) \ | |
290 | i->f->get_##field(starget); \ | |
291 | return snprintf(buf, 20, format_string, tp->field); \ | |
292 | } | |
293 | ||
294 | #define spi_transport_store_function(field, format_string) \ | |
295 | static ssize_t \ | |
ee959b00 TJ |
296 | store_spi_transport_##field(struct device *dev, \ |
297 | struct device_attribute *attr, \ | |
298 | const char *buf, size_t count) \ | |
1da177e4 LT |
299 | { \ |
300 | int val; \ | |
ee959b00 | 301 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
302 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
303 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
304 | \ | |
9b161a4d JB |
305 | if (!i->f->set_##field) \ |
306 | return -EINVAL; \ | |
1da177e4 | 307 | val = simple_strtoul(buf, NULL, 0); \ |
9b161a4d | 308 | i->f->set_##field(starget, val); \ |
62a86129 JB |
309 | return count; \ |
310 | } | |
311 | ||
312 | #define spi_transport_store_max(field, format_string) \ | |
313 | static ssize_t \ | |
ee959b00 TJ |
314 | store_spi_transport_##field(struct device *dev, \ |
315 | struct device_attribute *attr, \ | |
316 | const char *buf, size_t count) \ | |
62a86129 JB |
317 | { \ |
318 | int val; \ | |
ee959b00 | 319 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
320 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
321 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
322 | struct spi_transport_attrs *tp \ | |
323 | = (struct spi_transport_attrs *)&starget->starget_data; \ | |
324 | \ | |
9b161a4d JB |
325 | if (i->f->set_##field) \ |
326 | return -EINVAL; \ | |
62a86129 JB |
327 | val = simple_strtoul(buf, NULL, 0); \ |
328 | if (val > tp->max_##field) \ | |
329 | val = tp->max_##field; \ | |
1da177e4 LT |
330 | i->f->set_##field(starget, val); \ |
331 | return count; \ | |
332 | } | |
333 | ||
334 | #define spi_transport_rd_attr(field, format_string) \ | |
335 | spi_transport_show_function(field, format_string) \ | |
336 | spi_transport_store_function(field, format_string) \ | |
ee959b00 TJ |
337 | static DEVICE_ATTR(field, S_IRUGO, \ |
338 | show_spi_transport_##field, \ | |
339 | store_spi_transport_##field); | |
1da177e4 | 340 | |
62a86129 JB |
341 | #define spi_transport_simple_attr(field, format_string) \ |
342 | spi_transport_show_simple(field, format_string) \ | |
343 | spi_transport_store_simple(field, format_string) \ | |
ee959b00 TJ |
344 | static DEVICE_ATTR(field, S_IRUGO, \ |
345 | show_spi_transport_##field, \ | |
346 | store_spi_transport_##field); | |
62a86129 JB |
347 | |
348 | #define spi_transport_max_attr(field, format_string) \ | |
349 | spi_transport_show_function(field, format_string) \ | |
350 | spi_transport_store_max(field, format_string) \ | |
351 | spi_transport_simple_attr(max_##field, format_string) \ | |
ee959b00 TJ |
352 | static DEVICE_ATTR(field, S_IRUGO, \ |
353 | show_spi_transport_##field, \ | |
354 | store_spi_transport_##field); | |
62a86129 | 355 | |
1da177e4 | 356 | /* The Parallel SCSI Tranport Attributes: */ |
62a86129 JB |
357 | spi_transport_max_attr(offset, "%d\n"); |
358 | spi_transport_max_attr(width, "%d\n"); | |
1da177e4 LT |
359 | spi_transport_rd_attr(iu, "%d\n"); |
360 | spi_transport_rd_attr(dt, "%d\n"); | |
361 | spi_transport_rd_attr(qas, "%d\n"); | |
362 | spi_transport_rd_attr(wr_flow, "%d\n"); | |
363 | spi_transport_rd_attr(rd_strm, "%d\n"); | |
364 | spi_transport_rd_attr(rti, "%d\n"); | |
365 | spi_transport_rd_attr(pcomp_en, "%d\n"); | |
d872ebe4 | 366 | spi_transport_rd_attr(hold_mcs, "%d\n"); |
1da177e4 | 367 | |
9a881f16 | 368 | /* we only care about the first child device so we return 1 */ |
369 | static int child_iter(struct device *dev, void *data) | |
370 | { | |
371 | struct scsi_device *sdev = to_scsi_device(dev); | |
372 | ||
373 | spi_dv_device(sdev); | |
374 | return 1; | |
375 | } | |
376 | ||
1da177e4 | 377 | static ssize_t |
ee959b00 TJ |
378 | store_spi_revalidate(struct device *dev, struct device_attribute *attr, |
379 | const char *buf, size_t count) | |
1da177e4 | 380 | { |
ee959b00 | 381 | struct scsi_target *starget = transport_class_to_starget(dev); |
1da177e4 | 382 | |
9a881f16 | 383 | device_for_each_child(&starget->dev, NULL, child_iter); |
1da177e4 LT |
384 | return count; |
385 | } | |
ee959b00 | 386 | static DEVICE_ATTR(revalidate, S_IWUSR, NULL, store_spi_revalidate); |
1da177e4 LT |
387 | |
388 | /* Translate the period into ns according to the current spec | |
389 | * for SDTR/PPR messages */ | |
ef72582e | 390 | static int period_to_str(char *buf, int period) |
1da177e4 | 391 | { |
1da177e4 | 392 | int len, picosec; |
1da177e4 | 393 | |
62a86129 | 394 | if (period < 0 || period > 0xff) { |
1da177e4 | 395 | picosec = -1; |
62a86129 JB |
396 | } else if (period <= SPI_STATIC_PPR) { |
397 | picosec = ppr_to_ps[period]; | |
1da177e4 | 398 | } else { |
62a86129 | 399 | picosec = period * 4000; |
1da177e4 LT |
400 | } |
401 | ||
402 | if (picosec == -1) { | |
403 | len = sprintf(buf, "reserved"); | |
404 | } else { | |
405 | len = sprint_frac(buf, picosec, 1000); | |
406 | } | |
407 | ||
ef72582e MW |
408 | return len; |
409 | } | |
410 | ||
411 | static ssize_t | |
ea697e45 | 412 | show_spi_transport_period_helper(char *buf, int period) |
ef72582e MW |
413 | { |
414 | int len = period_to_str(buf, period); | |
1da177e4 LT |
415 | buf[len++] = '\n'; |
416 | buf[len] = '\0'; | |
417 | return len; | |
418 | } | |
419 | ||
420 | static ssize_t | |
ee959b00 | 421 | store_spi_transport_period_helper(struct device *dev, const char *buf, |
62a86129 | 422 | size_t count, int *periodp) |
1da177e4 | 423 | { |
1da177e4 LT |
424 | int j, picosec, period = -1; |
425 | char *endp; | |
426 | ||
427 | picosec = simple_strtoul(buf, &endp, 10) * 1000; | |
428 | if (*endp == '.') { | |
429 | int mult = 100; | |
430 | do { | |
431 | endp++; | |
432 | if (!isdigit(*endp)) | |
433 | break; | |
434 | picosec += (*endp - '0') * mult; | |
435 | mult /= 10; | |
436 | } while (mult > 0); | |
437 | } | |
438 | ||
439 | for (j = 0; j <= SPI_STATIC_PPR; j++) { | |
440 | if (ppr_to_ps[j] < picosec) | |
441 | continue; | |
442 | period = j; | |
443 | break; | |
444 | } | |
445 | ||
446 | if (period == -1) | |
447 | period = picosec / 4000; | |
448 | ||
449 | if (period > 0xff) | |
450 | period = 0xff; | |
451 | ||
62a86129 | 452 | *periodp = period; |
1da177e4 LT |
453 | |
454 | return count; | |
455 | } | |
456 | ||
62a86129 | 457 | static ssize_t |
ee959b00 TJ |
458 | show_spi_transport_period(struct device *dev, |
459 | struct device_attribute *attr, char *buf) | |
62a86129 | 460 | { |
ee959b00 | 461 | struct scsi_target *starget = transport_class_to_starget(dev); |
62a86129 JB |
462 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
463 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
464 | struct spi_transport_attrs *tp = | |
465 | (struct spi_transport_attrs *)&starget->starget_data; | |
466 | ||
467 | if (i->f->get_period) | |
468 | i->f->get_period(starget); | |
469 | ||
ea697e45 | 470 | return show_spi_transport_period_helper(buf, tp->period); |
62a86129 JB |
471 | } |
472 | ||
473 | static ssize_t | |
ee959b00 TJ |
474 | store_spi_transport_period(struct device *cdev, struct device_attribute *attr, |
475 | const char *buf, size_t count) | |
62a86129 JB |
476 | { |
477 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
478 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
479 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
480 | struct spi_transport_attrs *tp = | |
481 | (struct spi_transport_attrs *)&starget->starget_data; | |
482 | int period, retval; | |
483 | ||
9b161a4d JB |
484 | if (!i->f->set_period) |
485 | return -EINVAL; | |
486 | ||
62a86129 JB |
487 | retval = store_spi_transport_period_helper(cdev, buf, count, &period); |
488 | ||
489 | if (period < tp->min_period) | |
490 | period = tp->min_period; | |
491 | ||
492 | i->f->set_period(starget, period); | |
493 | ||
494 | return retval; | |
495 | } | |
496 | ||
ee959b00 TJ |
497 | static DEVICE_ATTR(period, S_IRUGO, |
498 | show_spi_transport_period, | |
499 | store_spi_transport_period); | |
1da177e4 | 500 | |
62a86129 | 501 | static ssize_t |
ee959b00 TJ |
502 | show_spi_transport_min_period(struct device *cdev, |
503 | struct device_attribute *attr, char *buf) | |
62a86129 JB |
504 | { |
505 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
9b161a4d JB |
506 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
507 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
62a86129 JB |
508 | struct spi_transport_attrs *tp = |
509 | (struct spi_transport_attrs *)&starget->starget_data; | |
510 | ||
9b161a4d JB |
511 | if (!i->f->set_period) |
512 | return -EINVAL; | |
513 | ||
ea697e45 | 514 | return show_spi_transport_period_helper(buf, tp->min_period); |
62a86129 JB |
515 | } |
516 | ||
517 | static ssize_t | |
ee959b00 TJ |
518 | store_spi_transport_min_period(struct device *cdev, |
519 | struct device_attribute *attr, | |
520 | const char *buf, size_t count) | |
62a86129 JB |
521 | { |
522 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
523 | struct spi_transport_attrs *tp = | |
524 | (struct spi_transport_attrs *)&starget->starget_data; | |
525 | ||
526 | return store_spi_transport_period_helper(cdev, buf, count, | |
527 | &tp->min_period); | |
528 | } | |
529 | ||
530 | ||
ee959b00 TJ |
531 | static DEVICE_ATTR(min_period, S_IRUGO, |
532 | show_spi_transport_min_period, | |
533 | store_spi_transport_min_period); | |
62a86129 JB |
534 | |
535 | ||
ee959b00 TJ |
536 | static ssize_t show_spi_host_signalling(struct device *cdev, |
537 | struct device_attribute *attr, | |
538 | char *buf) | |
1da177e4 LT |
539 | { |
540 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
541 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
542 | ||
543 | if (i->f->get_signalling) | |
544 | i->f->get_signalling(shost); | |
545 | ||
546 | return sprintf(buf, "%s\n", spi_signal_to_string(spi_signalling(shost))); | |
547 | } | |
ee959b00 TJ |
548 | static ssize_t store_spi_host_signalling(struct device *dev, |
549 | struct device_attribute *attr, | |
1da177e4 LT |
550 | const char *buf, size_t count) |
551 | { | |
ee959b00 | 552 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
553 | struct spi_internal *i = to_spi_internal(shost->transportt); |
554 | enum spi_signal_type type = spi_signal_to_value(buf); | |
555 | ||
9b161a4d JB |
556 | if (!i->f->set_signalling) |
557 | return -EINVAL; | |
558 | ||
1da177e4 LT |
559 | if (type != SPI_SIGNAL_UNKNOWN) |
560 | i->f->set_signalling(shost, type); | |
561 | ||
562 | return count; | |
563 | } | |
ee959b00 TJ |
564 | static DEVICE_ATTR(signalling, S_IRUGO, |
565 | show_spi_host_signalling, | |
566 | store_spi_host_signalling); | |
1da177e4 LT |
567 | |
568 | #define DV_SET(x, y) \ | |
569 | if(i->f->set_##x) \ | |
570 | i->f->set_##x(sdev->sdev_target, y) | |
571 | ||
1da177e4 LT |
572 | enum spi_compare_returns { |
573 | SPI_COMPARE_SUCCESS, | |
574 | SPI_COMPARE_FAILURE, | |
575 | SPI_COMPARE_SKIP_TEST, | |
576 | }; | |
577 | ||
578 | ||
579 | /* This is for read/write Domain Validation: If the device supports | |
580 | * an echo buffer, we do read/write tests to it */ | |
581 | static enum spi_compare_returns | |
33aa687d | 582 | spi_dv_device_echo_buffer(struct scsi_device *sdev, u8 *buffer, |
1da177e4 LT |
583 | u8 *ptr, const int retries) |
584 | { | |
1da177e4 | 585 | int len = ptr - buffer; |
33aa687d | 586 | int j, k, r, result; |
1da177e4 | 587 | unsigned int pattern = 0x0000ffff; |
33aa687d | 588 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
589 | |
590 | const char spi_write_buffer[] = { | |
591 | WRITE_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 | |
592 | }; | |
593 | const char spi_read_buffer[] = { | |
594 | READ_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 | |
595 | }; | |
596 | ||
597 | /* set up the pattern buffer. Doesn't matter if we spill | |
598 | * slightly beyond since that's where the read buffer is */ | |
599 | for (j = 0; j < len; ) { | |
600 | ||
601 | /* fill the buffer with counting (test a) */ | |
602 | for ( ; j < min(len, 32); j++) | |
603 | buffer[j] = j; | |
604 | k = j; | |
605 | /* fill the buffer with alternating words of 0x0 and | |
606 | * 0xffff (test b) */ | |
607 | for ( ; j < min(len, k + 32); j += 2) { | |
608 | u16 *word = (u16 *)&buffer[j]; | |
609 | ||
610 | *word = (j & 0x02) ? 0x0000 : 0xffff; | |
611 | } | |
612 | k = j; | |
613 | /* fill with crosstalk (alternating 0x5555 0xaaa) | |
614 | * (test c) */ | |
615 | for ( ; j < min(len, k + 32); j += 2) { | |
616 | u16 *word = (u16 *)&buffer[j]; | |
617 | ||
618 | *word = (j & 0x02) ? 0x5555 : 0xaaaa; | |
619 | } | |
620 | k = j; | |
621 | /* fill with shifting bits (test d) */ | |
622 | for ( ; j < min(len, k + 32); j += 4) { | |
623 | u32 *word = (unsigned int *)&buffer[j]; | |
624 | u32 roll = (pattern & 0x80000000) ? 1 : 0; | |
625 | ||
626 | *word = pattern; | |
627 | pattern = (pattern << 1) | roll; | |
628 | } | |
629 | /* don't bother with random data (test e) */ | |
630 | } | |
631 | ||
632 | for (r = 0; r < retries; r++) { | |
33aa687d JB |
633 | result = spi_execute(sdev, spi_write_buffer, DMA_TO_DEVICE, |
634 | buffer, len, &sshdr); | |
635 | if(result || !scsi_device_online(sdev)) { | |
1da177e4 LT |
636 | |
637 | scsi_device_set_state(sdev, SDEV_QUIESCE); | |
33aa687d | 638 | if (scsi_sense_valid(&sshdr) |
1da177e4 LT |
639 | && sshdr.sense_key == ILLEGAL_REQUEST |
640 | /* INVALID FIELD IN CDB */ | |
641 | && sshdr.asc == 0x24 && sshdr.ascq == 0x00) | |
642 | /* This would mean that the drive lied | |
643 | * to us about supporting an echo | |
644 | * buffer (unfortunately some Western | |
645 | * Digital drives do precisely this) | |
646 | */ | |
647 | return SPI_COMPARE_SKIP_TEST; | |
648 | ||
649 | ||
9ccfc756 | 650 | sdev_printk(KERN_ERR, sdev, "Write Buffer failure %x\n", result); |
1da177e4 LT |
651 | return SPI_COMPARE_FAILURE; |
652 | } | |
653 | ||
654 | memset(ptr, 0, len); | |
33aa687d JB |
655 | spi_execute(sdev, spi_read_buffer, DMA_FROM_DEVICE, |
656 | ptr, len, NULL); | |
1da177e4 LT |
657 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
658 | ||
659 | if (memcmp(buffer, ptr, len) != 0) | |
660 | return SPI_COMPARE_FAILURE; | |
661 | } | |
662 | return SPI_COMPARE_SUCCESS; | |
663 | } | |
664 | ||
665 | /* This is for the simplest form of Domain Validation: a read test | |
666 | * on the inquiry data from the device */ | |
667 | static enum spi_compare_returns | |
33aa687d | 668 | spi_dv_device_compare_inquiry(struct scsi_device *sdev, u8 *buffer, |
1da177e4 LT |
669 | u8 *ptr, const int retries) |
670 | { | |
33aa687d JB |
671 | int r, result; |
672 | const int len = sdev->inquiry_len; | |
1da177e4 LT |
673 | const char spi_inquiry[] = { |
674 | INQUIRY, 0, 0, 0, len, 0 | |
675 | }; | |
676 | ||
677 | for (r = 0; r < retries; r++) { | |
1da177e4 LT |
678 | memset(ptr, 0, len); |
679 | ||
33aa687d JB |
680 | result = spi_execute(sdev, spi_inquiry, DMA_FROM_DEVICE, |
681 | ptr, len, NULL); | |
1da177e4 | 682 | |
33aa687d | 683 | if(result || !scsi_device_online(sdev)) { |
1da177e4 LT |
684 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
685 | return SPI_COMPARE_FAILURE; | |
686 | } | |
687 | ||
688 | /* If we don't have the inquiry data already, the | |
689 | * first read gets it */ | |
690 | if (ptr == buffer) { | |
691 | ptr += len; | |
692 | --r; | |
693 | continue; | |
694 | } | |
695 | ||
696 | if (memcmp(buffer, ptr, len) != 0) | |
697 | /* failure */ | |
698 | return SPI_COMPARE_FAILURE; | |
699 | } | |
700 | return SPI_COMPARE_SUCCESS; | |
701 | } | |
702 | ||
703 | static enum spi_compare_returns | |
33aa687d | 704 | spi_dv_retrain(struct scsi_device *sdev, u8 *buffer, u8 *ptr, |
1da177e4 | 705 | enum spi_compare_returns |
33aa687d | 706 | (*compare_fn)(struct scsi_device *, u8 *, u8 *, int)) |
1da177e4 | 707 | { |
33aa687d | 708 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
9a8bc9b8 | 709 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 LT |
710 | int period = 0, prevperiod = 0; |
711 | enum spi_compare_returns retval; | |
712 | ||
713 | ||
714 | for (;;) { | |
715 | int newperiod; | |
33aa687d | 716 | retval = compare_fn(sdev, buffer, ptr, DV_LOOPS); |
1da177e4 LT |
717 | |
718 | if (retval == SPI_COMPARE_SUCCESS | |
719 | || retval == SPI_COMPARE_SKIP_TEST) | |
720 | break; | |
721 | ||
722 | /* OK, retrain, fallback */ | |
9a8bc9b8 JB |
723 | if (i->f->get_iu) |
724 | i->f->get_iu(starget); | |
725 | if (i->f->get_qas) | |
726 | i->f->get_qas(starget); | |
1da177e4 LT |
727 | if (i->f->get_period) |
728 | i->f->get_period(sdev->sdev_target); | |
9a8bc9b8 JB |
729 | |
730 | /* Here's the fallback sequence; first try turning off | |
731 | * IU, then QAS (if we can control them), then finally | |
732 | * fall down the periods */ | |
733 | if (i->f->set_iu && spi_iu(starget)) { | |
9ccfc756 | 734 | starget_printk(KERN_ERR, starget, "Domain Validation Disabing Information Units\n"); |
9a8bc9b8 JB |
735 | DV_SET(iu, 0); |
736 | } else if (i->f->set_qas && spi_qas(starget)) { | |
9ccfc756 | 737 | starget_printk(KERN_ERR, starget, "Domain Validation Disabing Quick Arbitration and Selection\n"); |
9a8bc9b8 JB |
738 | DV_SET(qas, 0); |
739 | } else { | |
740 | newperiod = spi_period(starget); | |
741 | period = newperiod > period ? newperiod : period; | |
742 | if (period < 0x0d) | |
743 | period++; | |
744 | else | |
745 | period += period >> 1; | |
746 | ||
747 | if (unlikely(period > 0xff || period == prevperiod)) { | |
748 | /* Total failure; set to async and return */ | |
9ccfc756 | 749 | starget_printk(KERN_ERR, starget, "Domain Validation Failure, dropping back to Asynchronous\n"); |
9a8bc9b8 JB |
750 | DV_SET(offset, 0); |
751 | return SPI_COMPARE_FAILURE; | |
752 | } | |
9ccfc756 | 753 | starget_printk(KERN_ERR, starget, "Domain Validation detected failure, dropping back\n"); |
9a8bc9b8 JB |
754 | DV_SET(period, period); |
755 | prevperiod = period; | |
1da177e4 | 756 | } |
1da177e4 LT |
757 | } |
758 | return retval; | |
759 | } | |
760 | ||
761 | static int | |
33aa687d | 762 | spi_dv_device_get_echo_buffer(struct scsi_device *sdev, u8 *buffer) |
1da177e4 | 763 | { |
33aa687d | 764 | int l, result; |
1da177e4 LT |
765 | |
766 | /* first off do a test unit ready. This can error out | |
767 | * because of reservations or some other reason. If it | |
768 | * fails, the device won't let us write to the echo buffer | |
769 | * so just return failure */ | |
770 | ||
771 | const char spi_test_unit_ready[] = { | |
772 | TEST_UNIT_READY, 0, 0, 0, 0, 0 | |
773 | }; | |
774 | ||
775 | const char spi_read_buffer_descriptor[] = { | |
776 | READ_BUFFER, 0x0b, 0, 0, 0, 0, 0, 0, 4, 0 | |
777 | }; | |
778 | ||
779 | ||
1da177e4 LT |
780 | /* We send a set of three TURs to clear any outstanding |
781 | * unit attention conditions if they exist (Otherwise the | |
782 | * buffer tests won't be happy). If the TUR still fails | |
783 | * (reservation conflict, device not ready, etc) just | |
784 | * skip the write tests */ | |
785 | for (l = 0; ; l++) { | |
33aa687d JB |
786 | result = spi_execute(sdev, spi_test_unit_ready, DMA_NONE, |
787 | NULL, 0, NULL); | |
1da177e4 | 788 | |
33aa687d | 789 | if(result) { |
1da177e4 LT |
790 | if(l >= 3) |
791 | return 0; | |
792 | } else { | |
793 | /* TUR succeeded */ | |
794 | break; | |
795 | } | |
796 | } | |
797 | ||
33aa687d JB |
798 | result = spi_execute(sdev, spi_read_buffer_descriptor, |
799 | DMA_FROM_DEVICE, buffer, 4, NULL); | |
1da177e4 | 800 | |
33aa687d | 801 | if (result) |
1da177e4 LT |
802 | /* Device has no echo buffer */ |
803 | return 0; | |
804 | ||
805 | return buffer[3] + ((buffer[2] & 0x1f) << 8); | |
806 | } | |
807 | ||
808 | static void | |
33aa687d | 809 | spi_dv_device_internal(struct scsi_device *sdev, u8 *buffer) |
1da177e4 | 810 | { |
33aa687d | 811 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
62a86129 | 812 | struct scsi_target *starget = sdev->sdev_target; |
60eef257 | 813 | struct Scsi_Host *shost = sdev->host; |
1da177e4 | 814 | int len = sdev->inquiry_len; |
2302827c JB |
815 | int min_period = spi_min_period(starget); |
816 | int max_width = spi_max_width(starget); | |
1da177e4 LT |
817 | /* first set us up for narrow async */ |
818 | DV_SET(offset, 0); | |
819 | DV_SET(width, 0); | |
2302827c | 820 | |
33aa687d | 821 | if (spi_dv_device_compare_inquiry(sdev, buffer, buffer, DV_LOOPS) |
1da177e4 | 822 | != SPI_COMPARE_SUCCESS) { |
9ccfc756 | 823 | starget_printk(KERN_ERR, starget, "Domain Validation Initial Inquiry Failed\n"); |
1da177e4 LT |
824 | /* FIXME: should probably offline the device here? */ |
825 | return; | |
826 | } | |
827 | ||
2302827c JB |
828 | if (!scsi_device_wide(sdev)) { |
829 | spi_max_width(starget) = 0; | |
830 | max_width = 0; | |
831 | } | |
832 | ||
1da177e4 | 833 | /* test width */ |
2302827c | 834 | if (i->f->set_width && max_width) { |
9a8bc9b8 | 835 | i->f->set_width(starget, 1); |
62a86129 | 836 | |
33aa687d | 837 | if (spi_dv_device_compare_inquiry(sdev, buffer, |
1da177e4 LT |
838 | buffer + len, |
839 | DV_LOOPS) | |
840 | != SPI_COMPARE_SUCCESS) { | |
9ccfc756 | 841 | starget_printk(KERN_ERR, starget, "Wide Transfers Fail\n"); |
9a8bc9b8 | 842 | i->f->set_width(starget, 0); |
2302827c JB |
843 | /* Make sure we don't force wide back on by asking |
844 | * for a transfer period that requires it */ | |
845 | max_width = 0; | |
846 | if (min_period < 10) | |
847 | min_period = 10; | |
1da177e4 LT |
848 | } |
849 | } | |
850 | ||
851 | if (!i->f->set_period) | |
852 | return; | |
853 | ||
854 | /* device can't handle synchronous */ | |
eb1dd68b | 855 | if (!scsi_device_sync(sdev) && !scsi_device_dt(sdev)) |
1da177e4 LT |
856 | return; |
857 | ||
349cd7cf JB |
858 | /* len == -1 is the signal that we need to ascertain the |
859 | * presence of an echo buffer before trying to use it. len == | |
860 | * 0 means we don't have an echo buffer */ | |
861 | len = -1; | |
1da177e4 LT |
862 | |
863 | retry: | |
864 | ||
865 | /* now set up to the maximum */ | |
62a86129 | 866 | DV_SET(offset, spi_max_offset(starget)); |
2302827c JB |
867 | DV_SET(period, min_period); |
868 | ||
9a8bc9b8 JB |
869 | /* try QAS requests; this should be harmless to set if the |
870 | * target supports it */ | |
dfdc58ba | 871 | if (scsi_device_qas(sdev)) { |
eb1dd68b | 872 | DV_SET(qas, 1); |
dfdc58ba JB |
873 | } else { |
874 | DV_SET(qas, 0); | |
875 | } | |
876 | ||
2302827c | 877 | if (scsi_device_ius(sdev) && min_period < 9) { |
dfdc58ba | 878 | /* This u320 (or u640). Set IU transfers */ |
eb1dd68b | 879 | DV_SET(iu, 1); |
dfdc58ba | 880 | /* Then set the optional parameters */ |
9a8bc9b8 JB |
881 | DV_SET(rd_strm, 1); |
882 | DV_SET(wr_flow, 1); | |
883 | DV_SET(rti, 1); | |
2302827c | 884 | if (min_period == 8) |
9a8bc9b8 | 885 | DV_SET(pcomp_en, 1); |
dfdc58ba JB |
886 | } else { |
887 | DV_SET(iu, 0); | |
9a8bc9b8 | 888 | } |
dfdc58ba | 889 | |
60eef257 JB |
890 | /* now that we've done all this, actually check the bus |
891 | * signal type (if known). Some devices are stupid on | |
892 | * a SE bus and still claim they can try LVD only settings */ | |
893 | if (i->f->get_signalling) | |
894 | i->f->get_signalling(shost); | |
895 | if (spi_signalling(shost) == SPI_SIGNAL_SE || | |
dfdc58ba JB |
896 | spi_signalling(shost) == SPI_SIGNAL_HVD || |
897 | !scsi_device_dt(sdev)) { | |
60eef257 | 898 | DV_SET(dt, 0); |
dfdc58ba JB |
899 | } else { |
900 | DV_SET(dt, 1); | |
901 | } | |
2302827c JB |
902 | /* set width last because it will pull all the other |
903 | * parameters down to required values */ | |
904 | DV_SET(width, max_width); | |
905 | ||
349cd7cf JB |
906 | /* Do the read only INQUIRY tests */ |
907 | spi_dv_retrain(sdev, buffer, buffer + sdev->inquiry_len, | |
908 | spi_dv_device_compare_inquiry); | |
909 | /* See if we actually managed to negotiate and sustain DT */ | |
910 | if (i->f->get_dt) | |
911 | i->f->get_dt(starget); | |
912 | ||
913 | /* see if the device has an echo buffer. If it does we can do | |
914 | * the SPI pattern write tests. Because of some broken | |
915 | * devices, we *only* try this on a device that has actually | |
916 | * negotiated DT */ | |
917 | ||
918 | if (len == -1 && spi_dt(starget)) | |
919 | len = spi_dv_device_get_echo_buffer(sdev, buffer); | |
1da177e4 | 920 | |
349cd7cf | 921 | if (len <= 0) { |
9ccfc756 | 922 | starget_printk(KERN_INFO, starget, "Domain Validation skipping write tests\n"); |
1da177e4 LT |
923 | return; |
924 | } | |
925 | ||
926 | if (len > SPI_MAX_ECHO_BUFFER_SIZE) { | |
9ccfc756 | 927 | starget_printk(KERN_WARNING, starget, "Echo buffer size %d is too big, trimming to %d\n", len, SPI_MAX_ECHO_BUFFER_SIZE); |
1da177e4 LT |
928 | len = SPI_MAX_ECHO_BUFFER_SIZE; |
929 | } | |
930 | ||
33aa687d | 931 | if (spi_dv_retrain(sdev, buffer, buffer + len, |
1da177e4 LT |
932 | spi_dv_device_echo_buffer) |
933 | == SPI_COMPARE_SKIP_TEST) { | |
934 | /* OK, the stupid drive can't do a write echo buffer | |
935 | * test after all, fall back to the read tests */ | |
936 | len = 0; | |
937 | goto retry; | |
938 | } | |
939 | } | |
940 | ||
941 | ||
942 | /** spi_dv_device - Do Domain Validation on the device | |
943 | * @sdev: scsi device to validate | |
944 | * | |
945 | * Performs the domain validation on the given device in the | |
946 | * current execution thread. Since DV operations may sleep, | |
947 | * the current thread must have user context. Also no SCSI | |
948 | * related locks that would deadlock I/O issued by the DV may | |
949 | * be held. | |
950 | */ | |
951 | void | |
952 | spi_dv_device(struct scsi_device *sdev) | |
953 | { | |
1da177e4 LT |
954 | struct scsi_target *starget = sdev->sdev_target; |
955 | u8 *buffer; | |
956 | const int len = SPI_MAX_ECHO_BUFFER_SIZE*2; | |
957 | ||
1da177e4 | 958 | if (unlikely(scsi_device_get(sdev))) |
33aa687d | 959 | return; |
1da177e4 | 960 | |
dfdc58ba JB |
961 | if (unlikely(spi_dv_in_progress(starget))) |
962 | return; | |
963 | spi_dv_in_progress(starget) = 1; | |
964 | ||
24669f75 | 965 | buffer = kzalloc(len, GFP_KERNEL); |
1da177e4 LT |
966 | |
967 | if (unlikely(!buffer)) | |
968 | goto out_put; | |
969 | ||
1da177e4 LT |
970 | /* We need to verify that the actual device will quiesce; the |
971 | * later target quiesce is just a nice to have */ | |
972 | if (unlikely(scsi_device_quiesce(sdev))) | |
973 | goto out_free; | |
974 | ||
975 | scsi_target_quiesce(starget); | |
976 | ||
977 | spi_dv_pending(starget) = 1; | |
d158d261 | 978 | mutex_lock(&spi_dv_mutex(starget)); |
1da177e4 | 979 | |
9ccfc756 | 980 | starget_printk(KERN_INFO, starget, "Beginning Domain Validation\n"); |
1da177e4 | 981 | |
33aa687d | 982 | spi_dv_device_internal(sdev, buffer); |
1da177e4 | 983 | |
9ccfc756 | 984 | starget_printk(KERN_INFO, starget, "Ending Domain Validation\n"); |
1da177e4 | 985 | |
d158d261 | 986 | mutex_unlock(&spi_dv_mutex(starget)); |
1da177e4 LT |
987 | spi_dv_pending(starget) = 0; |
988 | ||
989 | scsi_target_resume(starget); | |
990 | ||
991 | spi_initial_dv(starget) = 1; | |
992 | ||
993 | out_free: | |
994 | kfree(buffer); | |
995 | out_put: | |
dfdc58ba | 996 | spi_dv_in_progress(starget) = 0; |
1da177e4 | 997 | scsi_device_put(sdev); |
1da177e4 LT |
998 | } |
999 | EXPORT_SYMBOL(spi_dv_device); | |
1000 | ||
1001 | struct work_queue_wrapper { | |
1002 | struct work_struct work; | |
1003 | struct scsi_device *sdev; | |
1004 | }; | |
1005 | ||
1006 | static void | |
c4028958 | 1007 | spi_dv_device_work_wrapper(struct work_struct *work) |
1da177e4 | 1008 | { |
c4028958 DH |
1009 | struct work_queue_wrapper *wqw = |
1010 | container_of(work, struct work_queue_wrapper, work); | |
1da177e4 LT |
1011 | struct scsi_device *sdev = wqw->sdev; |
1012 | ||
1013 | kfree(wqw); | |
1014 | spi_dv_device(sdev); | |
1015 | spi_dv_pending(sdev->sdev_target) = 0; | |
1016 | scsi_device_put(sdev); | |
1017 | } | |
1018 | ||
1019 | ||
1020 | /** | |
1021 | * spi_schedule_dv_device - schedule domain validation to occur on the device | |
1022 | * @sdev: The device to validate | |
1023 | * | |
1024 | * Identical to spi_dv_device() above, except that the DV will be | |
1025 | * scheduled to occur in a workqueue later. All memory allocations | |
1026 | * are atomic, so may be called from any context including those holding | |
1027 | * SCSI locks. | |
1028 | */ | |
1029 | void | |
1030 | spi_schedule_dv_device(struct scsi_device *sdev) | |
1031 | { | |
1032 | struct work_queue_wrapper *wqw = | |
1033 | kmalloc(sizeof(struct work_queue_wrapper), GFP_ATOMIC); | |
1034 | ||
1035 | if (unlikely(!wqw)) | |
1036 | return; | |
1037 | ||
1038 | if (unlikely(spi_dv_pending(sdev->sdev_target))) { | |
1039 | kfree(wqw); | |
1040 | return; | |
1041 | } | |
1042 | /* Set pending early (dv_device doesn't check it, only sets it) */ | |
1043 | spi_dv_pending(sdev->sdev_target) = 1; | |
1044 | if (unlikely(scsi_device_get(sdev))) { | |
1045 | kfree(wqw); | |
1046 | spi_dv_pending(sdev->sdev_target) = 0; | |
1047 | return; | |
1048 | } | |
1049 | ||
c4028958 | 1050 | INIT_WORK(&wqw->work, spi_dv_device_work_wrapper); |
1da177e4 LT |
1051 | wqw->sdev = sdev; |
1052 | ||
1053 | schedule_work(&wqw->work); | |
1054 | } | |
1055 | EXPORT_SYMBOL(spi_schedule_dv_device); | |
1056 | ||
1057 | /** | |
1058 | * spi_display_xfer_agreement - Print the current target transfer agreement | |
1059 | * @starget: The target for which to display the agreement | |
1060 | * | |
1061 | * Each SPI port is required to maintain a transfer agreement for each | |
1062 | * other port on the bus. This function prints a one-line summary of | |
1063 | * the current agreement; more detailed information is available in sysfs. | |
1064 | */ | |
1065 | void spi_display_xfer_agreement(struct scsi_target *starget) | |
1066 | { | |
1067 | struct spi_transport_attrs *tp; | |
1068 | tp = (struct spi_transport_attrs *)&starget->starget_data; | |
1069 | ||
1070 | if (tp->offset > 0 && tp->period > 0) { | |
1071 | unsigned int picosec, kb100; | |
1072 | char *scsi = "FAST-?"; | |
1073 | char tmp[8]; | |
1074 | ||
1075 | if (tp->period <= SPI_STATIC_PPR) { | |
1076 | picosec = ppr_to_ps[tp->period]; | |
1077 | switch (tp->period) { | |
1078 | case 7: scsi = "FAST-320"; break; | |
1079 | case 8: scsi = "FAST-160"; break; | |
1080 | case 9: scsi = "FAST-80"; break; | |
1081 | case 10: | |
1082 | case 11: scsi = "FAST-40"; break; | |
1083 | case 12: scsi = "FAST-20"; break; | |
1084 | } | |
1085 | } else { | |
1086 | picosec = tp->period * 4000; | |
1087 | if (tp->period < 25) | |
1088 | scsi = "FAST-20"; | |
1089 | else if (tp->period < 50) | |
1090 | scsi = "FAST-10"; | |
1091 | else | |
1092 | scsi = "FAST-5"; | |
1093 | } | |
1094 | ||
1095 | kb100 = (10000000 + picosec / 2) / picosec; | |
1096 | if (tp->width) | |
1097 | kb100 *= 2; | |
1098 | sprint_frac(tmp, picosec, 1000); | |
1099 | ||
1100 | dev_info(&starget->dev, | |
d872ebe4 JB |
1101 | "%s %sSCSI %d.%d MB/s %s%s%s%s%s%s%s%s (%s ns, offset %d)\n", |
1102 | scsi, tp->width ? "WIDE " : "", kb100/10, kb100 % 10, | |
1103 | tp->dt ? "DT" : "ST", | |
1104 | tp->iu ? " IU" : "", | |
1105 | tp->qas ? " QAS" : "", | |
1106 | tp->rd_strm ? " RDSTRM" : "", | |
1107 | tp->rti ? " RTI" : "", | |
1108 | tp->wr_flow ? " WRFLOW" : "", | |
1109 | tp->pcomp_en ? " PCOMP" : "", | |
1110 | tp->hold_mcs ? " HMCS" : "", | |
1111 | tmp, tp->offset); | |
1da177e4 | 1112 | } else { |
493ff4ee | 1113 | dev_info(&starget->dev, "%sasynchronous\n", |
1da177e4 LT |
1114 | tp->width ? "wide " : ""); |
1115 | } | |
1116 | } | |
1117 | EXPORT_SYMBOL(spi_display_xfer_agreement); | |
1118 | ||
6ea3c0b2 MW |
1119 | int spi_populate_width_msg(unsigned char *msg, int width) |
1120 | { | |
1121 | msg[0] = EXTENDED_MESSAGE; | |
1122 | msg[1] = 2; | |
1123 | msg[2] = EXTENDED_WDTR; | |
1124 | msg[3] = width; | |
1125 | return 4; | |
1126 | } | |
38e14f89 | 1127 | EXPORT_SYMBOL_GPL(spi_populate_width_msg); |
6ea3c0b2 MW |
1128 | |
1129 | int spi_populate_sync_msg(unsigned char *msg, int period, int offset) | |
1130 | { | |
1131 | msg[0] = EXTENDED_MESSAGE; | |
1132 | msg[1] = 3; | |
1133 | msg[2] = EXTENDED_SDTR; | |
1134 | msg[3] = period; | |
1135 | msg[4] = offset; | |
1136 | return 5; | |
1137 | } | |
38e14f89 | 1138 | EXPORT_SYMBOL_GPL(spi_populate_sync_msg); |
6ea3c0b2 MW |
1139 | |
1140 | int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, | |
1141 | int width, int options) | |
1142 | { | |
1143 | msg[0] = EXTENDED_MESSAGE; | |
1144 | msg[1] = 6; | |
1145 | msg[2] = EXTENDED_PPR; | |
1146 | msg[3] = period; | |
1147 | msg[4] = 0; | |
1148 | msg[5] = offset; | |
1149 | msg[6] = width; | |
1150 | msg[7] = options; | |
1151 | return 8; | |
1152 | } | |
38e14f89 | 1153 | EXPORT_SYMBOL_GPL(spi_populate_ppr_msg); |
6ea3c0b2 | 1154 | |
410ca5c7 MW |
1155 | #ifdef CONFIG_SCSI_CONSTANTS |
1156 | static const char * const one_byte_msgs[] = { | |
72df0ebf | 1157 | /* 0x00 */ "Task Complete", NULL /* Extended Message */, "Save Pointers", |
410ca5c7 | 1158 | /* 0x03 */ "Restore Pointers", "Disconnect", "Initiator Error", |
72df0ebf | 1159 | /* 0x06 */ "Abort Task Set", "Message Reject", "Nop", "Message Parity Error", |
410ca5c7 | 1160 | /* 0x0a */ "Linked Command Complete", "Linked Command Complete w/flag", |
72df0ebf MW |
1161 | /* 0x0c */ "Target Reset", "Abort Task", "Clear Task Set", |
1162 | /* 0x0f */ "Initiate Recovery", "Release Recovery", | |
1163 | /* 0x11 */ "Terminate Process", "Continue Task", "Target Transfer Disable", | |
1164 | /* 0x14 */ NULL, NULL, "Clear ACA", "LUN Reset" | |
410ca5c7 | 1165 | }; |
410ca5c7 MW |
1166 | |
1167 | static const char * const two_byte_msgs[] = { | |
47972153 | 1168 | /* 0x20 */ "Simple Queue Tag", "Head of Queue Tag", "Ordered Queue Tag", |
72df0ebf | 1169 | /* 0x23 */ "Ignore Wide Residue", "ACA" |
410ca5c7 | 1170 | }; |
410ca5c7 MW |
1171 | |
1172 | static const char * const extended_msgs[] = { | |
1173 | /* 0x00 */ "Modify Data Pointer", "Synchronous Data Transfer Request", | |
ef72582e | 1174 | /* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request", |
fc25307d | 1175 | /* 0x04 */ "Parallel Protocol Request", "Modify Bidirectional Data Pointer" |
410ca5c7 | 1176 | }; |
410ca5c7 | 1177 | |
bdd70f2c | 1178 | static void print_nego(const unsigned char *msg, int per, int off, int width) |
ef72582e MW |
1179 | { |
1180 | if (per) { | |
1181 | char buf[20]; | |
1182 | period_to_str(buf, msg[per]); | |
1183 | printk("period = %s ns ", buf); | |
1184 | } | |
1185 | ||
1186 | if (off) | |
1187 | printk("offset = %d ", msg[off]); | |
1188 | if (width) | |
1189 | printk("width = %d ", 8 << msg[width]); | |
1190 | } | |
410ca5c7 | 1191 | |
fc25307d MW |
1192 | static void print_ptr(const unsigned char *msg, int msb, const char *desc) |
1193 | { | |
1194 | int ptr = (msg[msb] << 24) | (msg[msb+1] << 16) | (msg[msb+2] << 8) | | |
1195 | msg[msb+3]; | |
1196 | printk("%s = %d ", desc, ptr); | |
1197 | } | |
1198 | ||
1abfd370 | 1199 | int spi_print_msg(const unsigned char *msg) |
410ca5c7 | 1200 | { |
72df0ebf | 1201 | int len = 1, i; |
410ca5c7 | 1202 | if (msg[0] == EXTENDED_MESSAGE) { |
fc25307d MW |
1203 | len = 2 + msg[1]; |
1204 | if (len == 2) | |
1205 | len += 256; | |
b32aaffc | 1206 | if (msg[2] < ARRAY_SIZE(extended_msgs)) |
410ca5c7 MW |
1207 | printk ("%s ", extended_msgs[msg[2]]); |
1208 | else | |
1209 | printk ("Extended Message, reserved code (0x%02x) ", | |
1210 | (int) msg[2]); | |
1211 | switch (msg[2]) { | |
1212 | case EXTENDED_MODIFY_DATA_POINTER: | |
fc25307d | 1213 | print_ptr(msg, 3, "pointer"); |
410ca5c7 MW |
1214 | break; |
1215 | case EXTENDED_SDTR: | |
ef72582e | 1216 | print_nego(msg, 3, 4, 0); |
410ca5c7 MW |
1217 | break; |
1218 | case EXTENDED_WDTR: | |
ef72582e MW |
1219 | print_nego(msg, 0, 0, 3); |
1220 | break; | |
1221 | case EXTENDED_PPR: | |
1222 | print_nego(msg, 3, 5, 6); | |
410ca5c7 | 1223 | break; |
fc25307d MW |
1224 | case EXTENDED_MODIFY_BIDI_DATA_PTR: |
1225 | print_ptr(msg, 3, "out"); | |
1226 | print_ptr(msg, 7, "in"); | |
1227 | break; | |
410ca5c7 MW |
1228 | default: |
1229 | for (i = 2; i < len; ++i) | |
1230 | printk("%02x ", msg[i]); | |
1231 | } | |
1232 | /* Identify */ | |
1233 | } else if (msg[0] & 0x80) { | |
1234 | printk("Identify disconnect %sallowed %s %d ", | |
1235 | (msg[0] & 0x40) ? "" : "not ", | |
1236 | (msg[0] & 0x20) ? "target routine" : "lun", | |
1237 | msg[0] & 0x7); | |
410ca5c7 MW |
1238 | /* Normal One byte */ |
1239 | } else if (msg[0] < 0x1f) { | |
72df0ebf | 1240 | if (msg[0] < ARRAY_SIZE(one_byte_msgs) && one_byte_msgs[msg[0]]) |
e24d873d | 1241 | printk("%s ", one_byte_msgs[msg[0]]); |
410ca5c7 MW |
1242 | else |
1243 | printk("reserved (%02x) ", msg[0]); | |
72df0ebf MW |
1244 | } else if (msg[0] == 0x55) { |
1245 | printk("QAS Request "); | |
410ca5c7 MW |
1246 | /* Two byte */ |
1247 | } else if (msg[0] <= 0x2f) { | |
b32aaffc | 1248 | if ((msg[0] - 0x20) < ARRAY_SIZE(two_byte_msgs)) |
410ca5c7 MW |
1249 | printk("%s %02x ", two_byte_msgs[msg[0] - 0x20], |
1250 | msg[1]); | |
1251 | else | |
1252 | printk("reserved two byte (%02x %02x) ", | |
1253 | msg[0], msg[1]); | |
1254 | len = 2; | |
1255 | } else | |
e24d873d | 1256 | printk("reserved "); |
410ca5c7 MW |
1257 | return len; |
1258 | } | |
1abfd370 | 1259 | EXPORT_SYMBOL(spi_print_msg); |
410ca5c7 MW |
1260 | |
1261 | #else /* ifndef CONFIG_SCSI_CONSTANTS */ | |
1262 | ||
1abfd370 | 1263 | int spi_print_msg(const unsigned char *msg) |
410ca5c7 | 1264 | { |
72df0ebf | 1265 | int len = 1, i; |
410ca5c7 MW |
1266 | |
1267 | if (msg[0] == EXTENDED_MESSAGE) { | |
fc25307d MW |
1268 | len = 2 + msg[1]; |
1269 | if (len == 2) | |
1270 | len += 256; | |
410ca5c7 MW |
1271 | for (i = 0; i < len; ++i) |
1272 | printk("%02x ", msg[i]); | |
1273 | /* Identify */ | |
1274 | } else if (msg[0] & 0x80) { | |
1275 | printk("%02x ", msg[0]); | |
410ca5c7 | 1276 | /* Normal One byte */ |
597705aa | 1277 | } else if ((msg[0] < 0x1f) || (msg[0] == 0x55)) { |
410ca5c7 | 1278 | printk("%02x ", msg[0]); |
410ca5c7 MW |
1279 | /* Two byte */ |
1280 | } else if (msg[0] <= 0x2f) { | |
1281 | printk("%02x %02x", msg[0], msg[1]); | |
1282 | len = 2; | |
1283 | } else | |
1284 | printk("%02x ", msg[0]); | |
1285 | return len; | |
1286 | } | |
1abfd370 | 1287 | EXPORT_SYMBOL(spi_print_msg); |
410ca5c7 MW |
1288 | #endif /* ! CONFIG_SCSI_CONSTANTS */ |
1289 | ||
1da177e4 LT |
1290 | static int spi_device_match(struct attribute_container *cont, |
1291 | struct device *dev) | |
1292 | { | |
1293 | struct scsi_device *sdev; | |
1294 | struct Scsi_Host *shost; | |
10c1b889 | 1295 | struct spi_internal *i; |
1da177e4 LT |
1296 | |
1297 | if (!scsi_is_sdev_device(dev)) | |
1298 | return 0; | |
1299 | ||
1300 | sdev = to_scsi_device(dev); | |
1301 | shost = sdev->host; | |
1302 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1303 | != &spi_host_class.class) | |
1304 | return 0; | |
1305 | /* Note: this class has no device attributes, so it has | |
1306 | * no per-HBA allocation and thus we don't need to distinguish | |
1307 | * the attribute containers for the device */ | |
10c1b889 JB |
1308 | i = to_spi_internal(shost->transportt); |
1309 | if (i->f->deny_binding && i->f->deny_binding(sdev->sdev_target)) | |
1310 | return 0; | |
1da177e4 LT |
1311 | return 1; |
1312 | } | |
1313 | ||
1314 | static int spi_target_match(struct attribute_container *cont, | |
1315 | struct device *dev) | |
1316 | { | |
1317 | struct Scsi_Host *shost; | |
10c1b889 | 1318 | struct scsi_target *starget; |
1da177e4 LT |
1319 | struct spi_internal *i; |
1320 | ||
1321 | if (!scsi_is_target_device(dev)) | |
1322 | return 0; | |
1323 | ||
1324 | shost = dev_to_shost(dev->parent); | |
1325 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1326 | != &spi_host_class.class) | |
1327 | return 0; | |
1328 | ||
1329 | i = to_spi_internal(shost->transportt); | |
10c1b889 JB |
1330 | starget = to_scsi_target(dev); |
1331 | ||
1332 | if (i->f->deny_binding && i->f->deny_binding(starget)) | |
1333 | return 0; | |
1334 | ||
1da177e4 LT |
1335 | return &i->t.target_attrs.ac == cont; |
1336 | } | |
1337 | ||
1338 | static DECLARE_TRANSPORT_CLASS(spi_transport_class, | |
1339 | "spi_transport", | |
1340 | spi_setup_transport_attrs, | |
1341 | NULL, | |
9b161a4d | 1342 | spi_target_configure); |
1da177e4 LT |
1343 | |
1344 | static DECLARE_ANON_TRANSPORT_CLASS(spi_device_class, | |
1345 | spi_device_match, | |
1346 | spi_device_configure); | |
1347 | ||
9b161a4d | 1348 | static struct attribute *host_attributes[] = { |
ee959b00 | 1349 | &dev_attr_signalling.attr, |
9b161a4d JB |
1350 | NULL |
1351 | }; | |
1352 | ||
1353 | static struct attribute_group host_attribute_group = { | |
1354 | .attrs = host_attributes, | |
1355 | }; | |
1356 | ||
1357 | static int spi_host_configure(struct transport_container *tc, | |
1358 | struct device *dev, | |
ee959b00 | 1359 | struct device *cdev) |
9b161a4d JB |
1360 | { |
1361 | struct kobject *kobj = &cdev->kobj; | |
1362 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1363 | struct spi_internal *si = to_spi_internal(shost->transportt); | |
ee959b00 | 1364 | struct attribute *attr = &dev_attr_signalling.attr; |
9b161a4d JB |
1365 | int rc = 0; |
1366 | ||
1367 | if (si->f->set_signalling) | |
1368 | rc = sysfs_chmod_file(kobj, attr, attr->mode | S_IWUSR); | |
1369 | ||
1370 | return rc; | |
1371 | } | |
1372 | ||
1373 | /* returns true if we should be showing the variable. Also | |
1374 | * overloads the return by setting 1<<1 if the attribute should | |
1375 | * be writeable */ | |
1376 | #define TARGET_ATTRIBUTE_HELPER(name) \ | |
1377 | (si->f->show_##name ? 1 : 0) + \ | |
1378 | (si->f->set_##name ? 2 : 0) | |
1379 | ||
1380 | static int target_attribute_is_visible(struct kobject *kobj, | |
1381 | struct attribute *attr, int i) | |
1382 | { | |
ee959b00 | 1383 | struct device *cdev = container_of(kobj, struct device, kobj); |
9b161a4d JB |
1384 | struct scsi_target *starget = transport_class_to_starget(cdev); |
1385 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1386 | struct spi_internal *si = to_spi_internal(shost->transportt); | |
1387 | ||
ee959b00 | 1388 | if (attr == &dev_attr_period.attr && |
9b161a4d JB |
1389 | spi_support_sync(starget)) |
1390 | return TARGET_ATTRIBUTE_HELPER(period); | |
ee959b00 | 1391 | else if (attr == &dev_attr_min_period.attr && |
9b161a4d JB |
1392 | spi_support_sync(starget)) |
1393 | return TARGET_ATTRIBUTE_HELPER(period); | |
ee959b00 | 1394 | else if (attr == &dev_attr_offset.attr && |
9b161a4d JB |
1395 | spi_support_sync(starget)) |
1396 | return TARGET_ATTRIBUTE_HELPER(offset); | |
ee959b00 | 1397 | else if (attr == &dev_attr_max_offset.attr && |
9b161a4d JB |
1398 | spi_support_sync(starget)) |
1399 | return TARGET_ATTRIBUTE_HELPER(offset); | |
ee959b00 | 1400 | else if (attr == &dev_attr_width.attr && |
9b161a4d JB |
1401 | spi_support_wide(starget)) |
1402 | return TARGET_ATTRIBUTE_HELPER(width); | |
ee959b00 | 1403 | else if (attr == &dev_attr_max_width.attr && |
9b161a4d JB |
1404 | spi_support_wide(starget)) |
1405 | return TARGET_ATTRIBUTE_HELPER(width); | |
ee959b00 | 1406 | else if (attr == &dev_attr_iu.attr && |
9b161a4d JB |
1407 | spi_support_ius(starget)) |
1408 | return TARGET_ATTRIBUTE_HELPER(iu); | |
ee959b00 | 1409 | else if (attr == &dev_attr_dt.attr && |
9b161a4d JB |
1410 | spi_support_dt(starget)) |
1411 | return TARGET_ATTRIBUTE_HELPER(dt); | |
ee959b00 | 1412 | else if (attr == &dev_attr_qas.attr && |
9b161a4d JB |
1413 | spi_support_qas(starget)) |
1414 | return TARGET_ATTRIBUTE_HELPER(qas); | |
ee959b00 | 1415 | else if (attr == &dev_attr_wr_flow.attr && |
9b161a4d JB |
1416 | spi_support_ius(starget)) |
1417 | return TARGET_ATTRIBUTE_HELPER(wr_flow); | |
ee959b00 | 1418 | else if (attr == &dev_attr_rd_strm.attr && |
9b161a4d JB |
1419 | spi_support_ius(starget)) |
1420 | return TARGET_ATTRIBUTE_HELPER(rd_strm); | |
ee959b00 | 1421 | else if (attr == &dev_attr_rti.attr && |
9b161a4d JB |
1422 | spi_support_ius(starget)) |
1423 | return TARGET_ATTRIBUTE_HELPER(rti); | |
ee959b00 | 1424 | else if (attr == &dev_attr_pcomp_en.attr && |
9b161a4d JB |
1425 | spi_support_ius(starget)) |
1426 | return TARGET_ATTRIBUTE_HELPER(pcomp_en); | |
ee959b00 | 1427 | else if (attr == &dev_attr_hold_mcs.attr && |
9b161a4d JB |
1428 | spi_support_ius(starget)) |
1429 | return TARGET_ATTRIBUTE_HELPER(hold_mcs); | |
ee959b00 | 1430 | else if (attr == &dev_attr_revalidate.attr) |
9b161a4d JB |
1431 | return 1; |
1432 | ||
1433 | return 0; | |
1434 | } | |
1435 | ||
1436 | static struct attribute *target_attributes[] = { | |
ee959b00 TJ |
1437 | &dev_attr_period.attr, |
1438 | &dev_attr_min_period.attr, | |
1439 | &dev_attr_offset.attr, | |
1440 | &dev_attr_max_offset.attr, | |
1441 | &dev_attr_width.attr, | |
1442 | &dev_attr_max_width.attr, | |
1443 | &dev_attr_iu.attr, | |
1444 | &dev_attr_dt.attr, | |
1445 | &dev_attr_qas.attr, | |
1446 | &dev_attr_wr_flow.attr, | |
1447 | &dev_attr_rd_strm.attr, | |
1448 | &dev_attr_rti.attr, | |
1449 | &dev_attr_pcomp_en.attr, | |
1450 | &dev_attr_hold_mcs.attr, | |
1451 | &dev_attr_revalidate.attr, | |
9b161a4d JB |
1452 | NULL |
1453 | }; | |
1454 | ||
1455 | static struct attribute_group target_attribute_group = { | |
1456 | .attrs = target_attributes, | |
1457 | .is_visible = target_attribute_is_visible, | |
1458 | }; | |
1459 | ||
1460 | static int spi_target_configure(struct transport_container *tc, | |
1461 | struct device *dev, | |
ee959b00 | 1462 | struct device *cdev) |
9b161a4d JB |
1463 | { |
1464 | struct kobject *kobj = &cdev->kobj; | |
1465 | int i; | |
1466 | struct attribute *attr; | |
1467 | int rc; | |
1468 | ||
1469 | for (i = 0; (attr = target_attributes[i]) != NULL; i++) { | |
1470 | int j = target_attribute_group.is_visible(kobj, attr, i); | |
1471 | ||
1472 | /* FIXME: as well as returning -EEXIST, which we'd like | |
1473 | * to ignore, sysfs also does a WARN_ON and dumps a trace, | |
1474 | * which is bad, so temporarily, skip attributes that are | |
1475 | * already visible (the revalidate one) */ | |
ee959b00 | 1476 | if (j && attr != &dev_attr_revalidate.attr) |
9b161a4d JB |
1477 | rc = sysfs_add_file_to_group(kobj, attr, |
1478 | target_attribute_group.name); | |
1479 | /* and make the attribute writeable if we have a set | |
1480 | * function */ | |
1481 | if ((j & 1)) | |
1482 | rc = sysfs_chmod_file(kobj, attr, attr->mode | S_IWUSR); | |
1483 | } | |
1484 | ||
1485 | return 0; | |
1486 | } | |
1487 | ||
1da177e4 LT |
1488 | struct scsi_transport_template * |
1489 | spi_attach_transport(struct spi_function_template *ft) | |
1490 | { | |
24669f75 JS |
1491 | struct spi_internal *i = kzalloc(sizeof(struct spi_internal), |
1492 | GFP_KERNEL); | |
1493 | ||
1da177e4 LT |
1494 | if (unlikely(!i)) |
1495 | return NULL; | |
1496 | ||
1da177e4 | 1497 | i->t.target_attrs.ac.class = &spi_transport_class.class; |
9b161a4d | 1498 | i->t.target_attrs.ac.grp = &target_attribute_group; |
1da177e4 LT |
1499 | i->t.target_attrs.ac.match = spi_target_match; |
1500 | transport_container_register(&i->t.target_attrs); | |
1501 | i->t.target_size = sizeof(struct spi_transport_attrs); | |
1502 | i->t.host_attrs.ac.class = &spi_host_class.class; | |
9b161a4d | 1503 | i->t.host_attrs.ac.grp = &host_attribute_group; |
1da177e4 LT |
1504 | i->t.host_attrs.ac.match = spi_host_match; |
1505 | transport_container_register(&i->t.host_attrs); | |
1506 | i->t.host_size = sizeof(struct spi_host_attrs); | |
1507 | i->f = ft; | |
1508 | ||
1da177e4 LT |
1509 | return &i->t; |
1510 | } | |
1511 | EXPORT_SYMBOL(spi_attach_transport); | |
1512 | ||
1513 | void spi_release_transport(struct scsi_transport_template *t) | |
1514 | { | |
1515 | struct spi_internal *i = to_spi_internal(t); | |
1516 | ||
1517 | transport_container_unregister(&i->t.target_attrs); | |
1518 | transport_container_unregister(&i->t.host_attrs); | |
1519 | ||
1520 | kfree(i); | |
1521 | } | |
1522 | EXPORT_SYMBOL(spi_release_transport); | |
1523 | ||
1524 | static __init int spi_transport_init(void) | |
1525 | { | |
1526 | int error = transport_class_register(&spi_transport_class); | |
1527 | if (error) | |
1528 | return error; | |
1529 | error = anon_transport_class_register(&spi_device_class); | |
1530 | return transport_class_register(&spi_host_class); | |
1531 | } | |
1532 | ||
1533 | static void __exit spi_transport_exit(void) | |
1534 | { | |
1535 | transport_class_unregister(&spi_transport_class); | |
1536 | anon_transport_class_unregister(&spi_device_class); | |
1537 | transport_class_unregister(&spi_host_class); | |
1538 | } | |
1539 | ||
1540 | MODULE_AUTHOR("Martin Hicks"); | |
1541 | MODULE_DESCRIPTION("SPI Transport Attributes"); | |
1542 | MODULE_LICENSE("GPL"); | |
1543 | ||
1544 | module_init(spi_transport_init); | |
1545 | module_exit(spi_transport_exit); |