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> |
9f9a73b6 | 27 | #include <linux/sysfs.h> |
1da177e4 LT |
28 | #include <scsi/scsi.h> |
29 | #include "scsi_priv.h" | |
30 | #include <scsi/scsi_device.h> | |
31 | #include <scsi/scsi_host.h> | |
33aa687d | 32 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
33 | #include <scsi/scsi_eh.h> |
34 | #include <scsi/scsi_transport.h> | |
35 | #include <scsi/scsi_transport_spi.h> | |
36 | ||
d872ebe4 | 37 | #define SPI_NUM_ATTRS 14 /* increase this if you add attributes */ |
1da177e4 LT |
38 | #define SPI_OTHER_ATTRS 1 /* Increase this if you add "always |
39 | * on" attributes */ | |
40 | #define SPI_HOST_ATTRS 1 | |
41 | ||
42 | #define SPI_MAX_ECHO_BUFFER_SIZE 4096 | |
43 | ||
949bf797 JB |
44 | #define DV_LOOPS 3 |
45 | #define DV_TIMEOUT (10*HZ) | |
46 | #define DV_RETRIES 3 /* should only need at most | |
47 | * two cc/ua clears */ | |
48 | ||
1da177e4 | 49 | /* Private data accessors (keep these out of the header file) */ |
dfdc58ba | 50 | #define spi_dv_in_progress(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_in_progress) |
d158d261 | 51 | #define spi_dv_mutex(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_mutex) |
1da177e4 LT |
52 | |
53 | struct spi_internal { | |
54 | struct scsi_transport_template t; | |
55 | struct spi_function_template *f; | |
1da177e4 LT |
56 | }; |
57 | ||
58 | #define to_spi_internal(tmpl) container_of(tmpl, struct spi_internal, t) | |
59 | ||
60 | static const int ppr_to_ps[] = { | |
61 | /* The PPR values 0-6 are reserved, fill them in when | |
62 | * the committee defines them */ | |
63 | -1, /* 0x00 */ | |
64 | -1, /* 0x01 */ | |
65 | -1, /* 0x02 */ | |
66 | -1, /* 0x03 */ | |
67 | -1, /* 0x04 */ | |
68 | -1, /* 0x05 */ | |
69 | -1, /* 0x06 */ | |
70 | 3125, /* 0x07 */ | |
71 | 6250, /* 0x08 */ | |
72 | 12500, /* 0x09 */ | |
73 | 25000, /* 0x0a */ | |
74 | 30300, /* 0x0b */ | |
75 | 50000, /* 0x0c */ | |
76 | }; | |
77 | /* The PPR values at which you calculate the period in ns by multiplying | |
78 | * by 4 */ | |
79 | #define SPI_STATIC_PPR 0x0c | |
80 | ||
81 | static int sprint_frac(char *dest, int value, int denom) | |
82 | { | |
83 | int frac = value % denom; | |
84 | int result = sprintf(dest, "%d", value / denom); | |
85 | ||
86 | if (frac == 0) | |
87 | return result; | |
88 | dest[result++] = '.'; | |
89 | ||
90 | do { | |
91 | denom /= 10; | |
92 | sprintf(dest + result, "%d", frac / denom); | |
93 | result++; | |
94 | frac %= denom; | |
95 | } while (frac); | |
96 | ||
97 | dest[result++] = '\0'; | |
98 | return result; | |
99 | } | |
100 | ||
33aa687d JB |
101 | static int spi_execute(struct scsi_device *sdev, const void *cmd, |
102 | enum dma_data_direction dir, | |
103 | void *buffer, unsigned bufflen, | |
104 | struct scsi_sense_hdr *sshdr) | |
949bf797 | 105 | { |
33aa687d JB |
106 | int i, result; |
107 | unsigned char sense[SCSI_SENSE_BUFFERSIZE]; | |
949bf797 JB |
108 | |
109 | for(i = 0; i < DV_RETRIES; i++) { | |
33aa687d JB |
110 | result = scsi_execute(sdev, cmd, dir, buffer, bufflen, |
111 | sense, DV_TIMEOUT, /* retries */ 1, | |
6000a368 MC |
112 | REQ_FAILFAST_DEV | |
113 | REQ_FAILFAST_TRANSPORT | | |
114 | REQ_FAILFAST_DRIVER); | |
33aa687d JB |
115 | if (result & DRIVER_SENSE) { |
116 | struct scsi_sense_hdr sshdr_tmp; | |
117 | if (!sshdr) | |
118 | sshdr = &sshdr_tmp; | |
119 | ||
4ed381ee | 120 | if (scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, |
33aa687d JB |
121 | sshdr) |
122 | && sshdr->sense_key == UNIT_ATTENTION) | |
949bf797 JB |
123 | continue; |
124 | } | |
125 | break; | |
126 | } | |
33aa687d | 127 | return result; |
949bf797 JB |
128 | } |
129 | ||
1da177e4 LT |
130 | static struct { |
131 | enum spi_signal_type value; | |
132 | char *name; | |
133 | } signal_types[] = { | |
134 | { SPI_SIGNAL_UNKNOWN, "unknown" }, | |
135 | { SPI_SIGNAL_SE, "SE" }, | |
136 | { SPI_SIGNAL_LVD, "LVD" }, | |
137 | { SPI_SIGNAL_HVD, "HVD" }, | |
138 | }; | |
139 | ||
140 | static inline const char *spi_signal_to_string(enum spi_signal_type type) | |
141 | { | |
142 | int i; | |
143 | ||
6391a113 | 144 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
1da177e4 LT |
145 | if (type == signal_types[i].value) |
146 | return signal_types[i].name; | |
147 | } | |
148 | return NULL; | |
149 | } | |
150 | static inline enum spi_signal_type spi_signal_to_value(const char *name) | |
151 | { | |
152 | int i, len; | |
153 | ||
6391a113 | 154 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
1da177e4 LT |
155 | len = strlen(signal_types[i].name); |
156 | if (strncmp(name, signal_types[i].name, len) == 0 && | |
157 | (name[len] == '\n' || name[len] == '\0')) | |
158 | return signal_types[i].value; | |
159 | } | |
160 | return SPI_SIGNAL_UNKNOWN; | |
161 | } | |
162 | ||
d0a7e574 | 163 | static int spi_host_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 164 | struct device *cdev) |
1da177e4 LT |
165 | { |
166 | struct Scsi_Host *shost = dev_to_shost(dev); | |
167 | ||
168 | spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
9b161a4d JB |
173 | static int spi_host_configure(struct transport_container *tc, |
174 | struct device *dev, | |
ee959b00 | 175 | struct device *cdev); |
9b161a4d | 176 | |
1da177e4 LT |
177 | static DECLARE_TRANSPORT_CLASS(spi_host_class, |
178 | "spi_host", | |
179 | spi_host_setup, | |
180 | NULL, | |
9b161a4d | 181 | spi_host_configure); |
1da177e4 LT |
182 | |
183 | static int spi_host_match(struct attribute_container *cont, | |
184 | struct device *dev) | |
185 | { | |
186 | struct Scsi_Host *shost; | |
1da177e4 LT |
187 | |
188 | if (!scsi_is_host_device(dev)) | |
189 | return 0; | |
190 | ||
191 | shost = dev_to_shost(dev); | |
192 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
193 | != &spi_host_class.class) | |
194 | return 0; | |
195 | ||
9b161a4d | 196 | return &shost->transportt->host_attrs.ac == cont; |
1da177e4 LT |
197 | } |
198 | ||
9b161a4d JB |
199 | static int spi_target_configure(struct transport_container *tc, |
200 | struct device *dev, | |
ee959b00 | 201 | struct device *cdev); |
9b161a4d | 202 | |
d0a7e574 JB |
203 | static int spi_device_configure(struct transport_container *tc, |
204 | struct device *dev, | |
ee959b00 | 205 | struct device *cdev) |
1da177e4 LT |
206 | { |
207 | struct scsi_device *sdev = to_scsi_device(dev); | |
208 | struct scsi_target *starget = sdev->sdev_target; | |
209 | ||
210 | /* Populate the target capability fields with the values | |
211 | * gleaned from the device inquiry */ | |
212 | ||
213 | spi_support_sync(starget) = scsi_device_sync(sdev); | |
214 | spi_support_wide(starget) = scsi_device_wide(sdev); | |
215 | spi_support_dt(starget) = scsi_device_dt(sdev); | |
216 | spi_support_dt_only(starget) = scsi_device_dt_only(sdev); | |
217 | spi_support_ius(starget) = scsi_device_ius(sdev); | |
218 | spi_support_qas(starget) = scsi_device_qas(sdev); | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
d0a7e574 JB |
223 | static int spi_setup_transport_attrs(struct transport_container *tc, |
224 | struct device *dev, | |
ee959b00 | 225 | struct device *cdev) |
1da177e4 LT |
226 | { |
227 | struct scsi_target *starget = to_scsi_target(dev); | |
228 | ||
229 | spi_period(starget) = -1; /* illegal value */ | |
62a86129 | 230 | spi_min_period(starget) = 0; |
1da177e4 | 231 | spi_offset(starget) = 0; /* async */ |
62a86129 | 232 | spi_max_offset(starget) = 255; |
1da177e4 | 233 | spi_width(starget) = 0; /* narrow */ |
62a86129 | 234 | spi_max_width(starget) = 1; |
1da177e4 LT |
235 | spi_iu(starget) = 0; /* no IU */ |
236 | spi_dt(starget) = 0; /* ST */ | |
237 | spi_qas(starget) = 0; | |
238 | spi_wr_flow(starget) = 0; | |
239 | spi_rd_strm(starget) = 0; | |
240 | spi_rti(starget) = 0; | |
241 | spi_pcomp_en(starget) = 0; | |
d872ebe4 | 242 | spi_hold_mcs(starget) = 0; |
1da177e4 | 243 | spi_dv_pending(starget) = 0; |
dfdc58ba | 244 | spi_dv_in_progress(starget) = 0; |
1da177e4 | 245 | spi_initial_dv(starget) = 0; |
d158d261 | 246 | mutex_init(&spi_dv_mutex(starget)); |
1da177e4 LT |
247 | |
248 | return 0; | |
249 | } | |
250 | ||
62a86129 JB |
251 | #define spi_transport_show_simple(field, format_string) \ |
252 | \ | |
253 | static ssize_t \ | |
ee959b00 TJ |
254 | show_spi_transport_##field(struct device *dev, \ |
255 | struct device_attribute *attr, char *buf) \ | |
62a86129 | 256 | { \ |
ee959b00 | 257 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
258 | struct spi_transport_attrs *tp; \ |
259 | \ | |
260 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
261 | return snprintf(buf, 20, format_string, tp->field); \ | |
262 | } | |
263 | ||
264 | #define spi_transport_store_simple(field, format_string) \ | |
265 | \ | |
266 | static ssize_t \ | |
ee959b00 TJ |
267 | store_spi_transport_##field(struct device *dev, \ |
268 | struct device_attribute *attr, \ | |
269 | const char *buf, size_t count) \ | |
62a86129 JB |
270 | { \ |
271 | int val; \ | |
ee959b00 | 272 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
273 | struct spi_transport_attrs *tp; \ |
274 | \ | |
275 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
276 | val = simple_strtoul(buf, NULL, 0); \ | |
277 | tp->field = val; \ | |
278 | return count; \ | |
279 | } | |
280 | ||
1da177e4 LT |
281 | #define spi_transport_show_function(field, format_string) \ |
282 | \ | |
283 | static ssize_t \ | |
ee959b00 TJ |
284 | show_spi_transport_##field(struct device *dev, \ |
285 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 286 | { \ |
ee959b00 | 287 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
288 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
289 | struct spi_transport_attrs *tp; \ | |
290 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
291 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
292 | if (i->f->get_##field) \ | |
293 | i->f->get_##field(starget); \ | |
294 | return snprintf(buf, 20, format_string, tp->field); \ | |
295 | } | |
296 | ||
297 | #define spi_transport_store_function(field, format_string) \ | |
298 | static ssize_t \ | |
ee959b00 TJ |
299 | store_spi_transport_##field(struct device *dev, \ |
300 | struct device_attribute *attr, \ | |
301 | const char *buf, size_t count) \ | |
1da177e4 LT |
302 | { \ |
303 | int val; \ | |
ee959b00 | 304 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
305 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
306 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
307 | \ | |
9b161a4d JB |
308 | if (!i->f->set_##field) \ |
309 | return -EINVAL; \ | |
1da177e4 | 310 | val = simple_strtoul(buf, NULL, 0); \ |
9b161a4d | 311 | i->f->set_##field(starget, val); \ |
62a86129 JB |
312 | return count; \ |
313 | } | |
314 | ||
315 | #define spi_transport_store_max(field, format_string) \ | |
316 | static ssize_t \ | |
ee959b00 TJ |
317 | store_spi_transport_##field(struct device *dev, \ |
318 | struct device_attribute *attr, \ | |
319 | const char *buf, size_t count) \ | |
62a86129 JB |
320 | { \ |
321 | int val; \ | |
ee959b00 | 322 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
323 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
324 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
325 | struct spi_transport_attrs *tp \ | |
326 | = (struct spi_transport_attrs *)&starget->starget_data; \ | |
327 | \ | |
9b161a4d JB |
328 | if (i->f->set_##field) \ |
329 | return -EINVAL; \ | |
62a86129 JB |
330 | val = simple_strtoul(buf, NULL, 0); \ |
331 | if (val > tp->max_##field) \ | |
332 | val = tp->max_##field; \ | |
1da177e4 LT |
333 | i->f->set_##field(starget, val); \ |
334 | return count; \ | |
335 | } | |
336 | ||
337 | #define spi_transport_rd_attr(field, format_string) \ | |
338 | spi_transport_show_function(field, format_string) \ | |
339 | spi_transport_store_function(field, format_string) \ | |
ee959b00 TJ |
340 | static DEVICE_ATTR(field, S_IRUGO, \ |
341 | show_spi_transport_##field, \ | |
342 | store_spi_transport_##field); | |
1da177e4 | 343 | |
62a86129 JB |
344 | #define spi_transport_simple_attr(field, format_string) \ |
345 | spi_transport_show_simple(field, format_string) \ | |
346 | spi_transport_store_simple(field, format_string) \ | |
ee959b00 TJ |
347 | static DEVICE_ATTR(field, S_IRUGO, \ |
348 | show_spi_transport_##field, \ | |
349 | store_spi_transport_##field); | |
62a86129 JB |
350 | |
351 | #define spi_transport_max_attr(field, format_string) \ | |
352 | spi_transport_show_function(field, format_string) \ | |
353 | spi_transport_store_max(field, format_string) \ | |
354 | spi_transport_simple_attr(max_##field, format_string) \ | |
ee959b00 TJ |
355 | static DEVICE_ATTR(field, S_IRUGO, \ |
356 | show_spi_transport_##field, \ | |
357 | store_spi_transport_##field); | |
62a86129 | 358 | |
1da177e4 | 359 | /* The Parallel SCSI Tranport Attributes: */ |
62a86129 JB |
360 | spi_transport_max_attr(offset, "%d\n"); |
361 | spi_transport_max_attr(width, "%d\n"); | |
1da177e4 LT |
362 | spi_transport_rd_attr(iu, "%d\n"); |
363 | spi_transport_rd_attr(dt, "%d\n"); | |
364 | spi_transport_rd_attr(qas, "%d\n"); | |
365 | spi_transport_rd_attr(wr_flow, "%d\n"); | |
366 | spi_transport_rd_attr(rd_strm, "%d\n"); | |
367 | spi_transport_rd_attr(rti, "%d\n"); | |
368 | spi_transport_rd_attr(pcomp_en, "%d\n"); | |
d872ebe4 | 369 | spi_transport_rd_attr(hold_mcs, "%d\n"); |
1da177e4 | 370 | |
e8bac9e0 JB |
371 | /* we only care about the first child device that's a real SCSI device |
372 | * so we return 1 to terminate the iteration when we find it */ | |
9a881f16 | 373 | static int child_iter(struct device *dev, void *data) |
374 | { | |
e8bac9e0 JB |
375 | if (!scsi_is_sdev_device(dev)) |
376 | return 0; | |
9a881f16 | 377 | |
e8bac9e0 | 378 | spi_dv_device(to_scsi_device(dev)); |
9a881f16 | 379 | return 1; |
380 | } | |
381 | ||
1da177e4 | 382 | static ssize_t |
ee959b00 TJ |
383 | store_spi_revalidate(struct device *dev, struct device_attribute *attr, |
384 | const char *buf, size_t count) | |
1da177e4 | 385 | { |
ee959b00 | 386 | struct scsi_target *starget = transport_class_to_starget(dev); |
1da177e4 | 387 | |
9a881f16 | 388 | device_for_each_child(&starget->dev, NULL, child_iter); |
1da177e4 LT |
389 | return count; |
390 | } | |
ee959b00 | 391 | static DEVICE_ATTR(revalidate, S_IWUSR, NULL, store_spi_revalidate); |
1da177e4 LT |
392 | |
393 | /* Translate the period into ns according to the current spec | |
394 | * for SDTR/PPR messages */ | |
ef72582e | 395 | static int period_to_str(char *buf, int period) |
1da177e4 | 396 | { |
1da177e4 | 397 | int len, picosec; |
1da177e4 | 398 | |
62a86129 | 399 | if (period < 0 || period > 0xff) { |
1da177e4 | 400 | picosec = -1; |
62a86129 JB |
401 | } else if (period <= SPI_STATIC_PPR) { |
402 | picosec = ppr_to_ps[period]; | |
1da177e4 | 403 | } else { |
62a86129 | 404 | picosec = period * 4000; |
1da177e4 LT |
405 | } |
406 | ||
407 | if (picosec == -1) { | |
408 | len = sprintf(buf, "reserved"); | |
409 | } else { | |
410 | len = sprint_frac(buf, picosec, 1000); | |
411 | } | |
412 | ||
ef72582e MW |
413 | return len; |
414 | } | |
415 | ||
416 | static ssize_t | |
ea697e45 | 417 | show_spi_transport_period_helper(char *buf, int period) |
ef72582e MW |
418 | { |
419 | int len = period_to_str(buf, period); | |
1da177e4 LT |
420 | buf[len++] = '\n'; |
421 | buf[len] = '\0'; | |
422 | return len; | |
423 | } | |
424 | ||
425 | static ssize_t | |
ee959b00 | 426 | store_spi_transport_period_helper(struct device *dev, const char *buf, |
62a86129 | 427 | size_t count, int *periodp) |
1da177e4 | 428 | { |
1da177e4 LT |
429 | int j, picosec, period = -1; |
430 | char *endp; | |
431 | ||
432 | picosec = simple_strtoul(buf, &endp, 10) * 1000; | |
433 | if (*endp == '.') { | |
434 | int mult = 100; | |
435 | do { | |
436 | endp++; | |
437 | if (!isdigit(*endp)) | |
438 | break; | |
439 | picosec += (*endp - '0') * mult; | |
440 | mult /= 10; | |
441 | } while (mult > 0); | |
442 | } | |
443 | ||
444 | for (j = 0; j <= SPI_STATIC_PPR; j++) { | |
445 | if (ppr_to_ps[j] < picosec) | |
446 | continue; | |
447 | period = j; | |
448 | break; | |
449 | } | |
450 | ||
451 | if (period == -1) | |
452 | period = picosec / 4000; | |
453 | ||
454 | if (period > 0xff) | |
455 | period = 0xff; | |
456 | ||
62a86129 | 457 | *periodp = period; |
1da177e4 LT |
458 | |
459 | return count; | |
460 | } | |
461 | ||
62a86129 | 462 | static ssize_t |
ee959b00 TJ |
463 | show_spi_transport_period(struct device *dev, |
464 | struct device_attribute *attr, char *buf) | |
62a86129 | 465 | { |
ee959b00 | 466 | struct scsi_target *starget = transport_class_to_starget(dev); |
62a86129 JB |
467 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
468 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
469 | struct spi_transport_attrs *tp = | |
470 | (struct spi_transport_attrs *)&starget->starget_data; | |
471 | ||
472 | if (i->f->get_period) | |
473 | i->f->get_period(starget); | |
474 | ||
ea697e45 | 475 | return show_spi_transport_period_helper(buf, tp->period); |
62a86129 JB |
476 | } |
477 | ||
478 | static ssize_t | |
ee959b00 TJ |
479 | store_spi_transport_period(struct device *cdev, struct device_attribute *attr, |
480 | const char *buf, size_t count) | |
62a86129 JB |
481 | { |
482 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
483 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
484 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
485 | struct spi_transport_attrs *tp = | |
486 | (struct spi_transport_attrs *)&starget->starget_data; | |
487 | int period, retval; | |
488 | ||
9b161a4d JB |
489 | if (!i->f->set_period) |
490 | return -EINVAL; | |
491 | ||
62a86129 JB |
492 | retval = store_spi_transport_period_helper(cdev, buf, count, &period); |
493 | ||
494 | if (period < tp->min_period) | |
495 | period = tp->min_period; | |
496 | ||
497 | i->f->set_period(starget, period); | |
498 | ||
499 | return retval; | |
500 | } | |
501 | ||
ee959b00 TJ |
502 | static DEVICE_ATTR(period, S_IRUGO, |
503 | show_spi_transport_period, | |
504 | store_spi_transport_period); | |
1da177e4 | 505 | |
62a86129 | 506 | static ssize_t |
ee959b00 TJ |
507 | show_spi_transport_min_period(struct device *cdev, |
508 | struct device_attribute *attr, char *buf) | |
62a86129 JB |
509 | { |
510 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
9b161a4d JB |
511 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
512 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
62a86129 JB |
513 | struct spi_transport_attrs *tp = |
514 | (struct spi_transport_attrs *)&starget->starget_data; | |
515 | ||
9b161a4d JB |
516 | if (!i->f->set_period) |
517 | return -EINVAL; | |
518 | ||
ea697e45 | 519 | return show_spi_transport_period_helper(buf, tp->min_period); |
62a86129 JB |
520 | } |
521 | ||
522 | static ssize_t | |
ee959b00 TJ |
523 | store_spi_transport_min_period(struct device *cdev, |
524 | struct device_attribute *attr, | |
525 | const char *buf, size_t count) | |
62a86129 JB |
526 | { |
527 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
528 | struct spi_transport_attrs *tp = | |
529 | (struct spi_transport_attrs *)&starget->starget_data; | |
530 | ||
531 | return store_spi_transport_period_helper(cdev, buf, count, | |
532 | &tp->min_period); | |
533 | } | |
534 | ||
535 | ||
ee959b00 TJ |
536 | static DEVICE_ATTR(min_period, S_IRUGO, |
537 | show_spi_transport_min_period, | |
538 | store_spi_transport_min_period); | |
62a86129 JB |
539 | |
540 | ||
ee959b00 TJ |
541 | static ssize_t show_spi_host_signalling(struct device *cdev, |
542 | struct device_attribute *attr, | |
543 | char *buf) | |
1da177e4 LT |
544 | { |
545 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
546 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
547 | ||
548 | if (i->f->get_signalling) | |
549 | i->f->get_signalling(shost); | |
550 | ||
551 | return sprintf(buf, "%s\n", spi_signal_to_string(spi_signalling(shost))); | |
552 | } | |
ee959b00 TJ |
553 | static ssize_t store_spi_host_signalling(struct device *dev, |
554 | struct device_attribute *attr, | |
1da177e4 LT |
555 | const char *buf, size_t count) |
556 | { | |
ee959b00 | 557 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
558 | struct spi_internal *i = to_spi_internal(shost->transportt); |
559 | enum spi_signal_type type = spi_signal_to_value(buf); | |
560 | ||
9b161a4d JB |
561 | if (!i->f->set_signalling) |
562 | return -EINVAL; | |
563 | ||
1da177e4 LT |
564 | if (type != SPI_SIGNAL_UNKNOWN) |
565 | i->f->set_signalling(shost, type); | |
566 | ||
567 | return count; | |
568 | } | |
ee959b00 TJ |
569 | static DEVICE_ATTR(signalling, S_IRUGO, |
570 | show_spi_host_signalling, | |
571 | store_spi_host_signalling); | |
1da177e4 LT |
572 | |
573 | #define DV_SET(x, y) \ | |
574 | if(i->f->set_##x) \ | |
575 | i->f->set_##x(sdev->sdev_target, y) | |
576 | ||
1da177e4 LT |
577 | enum spi_compare_returns { |
578 | SPI_COMPARE_SUCCESS, | |
579 | SPI_COMPARE_FAILURE, | |
580 | SPI_COMPARE_SKIP_TEST, | |
581 | }; | |
582 | ||
583 | ||
584 | /* This is for read/write Domain Validation: If the device supports | |
585 | * an echo buffer, we do read/write tests to it */ | |
586 | static enum spi_compare_returns | |
33aa687d | 587 | spi_dv_device_echo_buffer(struct scsi_device *sdev, u8 *buffer, |
1da177e4 LT |
588 | u8 *ptr, const int retries) |
589 | { | |
1da177e4 | 590 | int len = ptr - buffer; |
33aa687d | 591 | int j, k, r, result; |
1da177e4 | 592 | unsigned int pattern = 0x0000ffff; |
33aa687d | 593 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
594 | |
595 | const char spi_write_buffer[] = { | |
596 | WRITE_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 | |
597 | }; | |
598 | const char spi_read_buffer[] = { | |
599 | READ_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 | |
600 | }; | |
601 | ||
602 | /* set up the pattern buffer. Doesn't matter if we spill | |
603 | * slightly beyond since that's where the read buffer is */ | |
604 | for (j = 0; j < len; ) { | |
605 | ||
606 | /* fill the buffer with counting (test a) */ | |
607 | for ( ; j < min(len, 32); j++) | |
608 | buffer[j] = j; | |
609 | k = j; | |
610 | /* fill the buffer with alternating words of 0x0 and | |
611 | * 0xffff (test b) */ | |
612 | for ( ; j < min(len, k + 32); j += 2) { | |
613 | u16 *word = (u16 *)&buffer[j]; | |
614 | ||
615 | *word = (j & 0x02) ? 0x0000 : 0xffff; | |
616 | } | |
617 | k = j; | |
618 | /* fill with crosstalk (alternating 0x5555 0xaaa) | |
619 | * (test c) */ | |
620 | for ( ; j < min(len, k + 32); j += 2) { | |
621 | u16 *word = (u16 *)&buffer[j]; | |
622 | ||
623 | *word = (j & 0x02) ? 0x5555 : 0xaaaa; | |
624 | } | |
625 | k = j; | |
626 | /* fill with shifting bits (test d) */ | |
627 | for ( ; j < min(len, k + 32); j += 4) { | |
628 | u32 *word = (unsigned int *)&buffer[j]; | |
629 | u32 roll = (pattern & 0x80000000) ? 1 : 0; | |
630 | ||
631 | *word = pattern; | |
632 | pattern = (pattern << 1) | roll; | |
633 | } | |
634 | /* don't bother with random data (test e) */ | |
635 | } | |
636 | ||
637 | for (r = 0; r < retries; r++) { | |
33aa687d JB |
638 | result = spi_execute(sdev, spi_write_buffer, DMA_TO_DEVICE, |
639 | buffer, len, &sshdr); | |
640 | if(result || !scsi_device_online(sdev)) { | |
1da177e4 LT |
641 | |
642 | scsi_device_set_state(sdev, SDEV_QUIESCE); | |
33aa687d | 643 | if (scsi_sense_valid(&sshdr) |
1da177e4 LT |
644 | && sshdr.sense_key == ILLEGAL_REQUEST |
645 | /* INVALID FIELD IN CDB */ | |
646 | && sshdr.asc == 0x24 && sshdr.ascq == 0x00) | |
647 | /* This would mean that the drive lied | |
648 | * to us about supporting an echo | |
649 | * buffer (unfortunately some Western | |
650 | * Digital drives do precisely this) | |
651 | */ | |
652 | return SPI_COMPARE_SKIP_TEST; | |
653 | ||
654 | ||
9ccfc756 | 655 | sdev_printk(KERN_ERR, sdev, "Write Buffer failure %x\n", result); |
1da177e4 LT |
656 | return SPI_COMPARE_FAILURE; |
657 | } | |
658 | ||
659 | memset(ptr, 0, len); | |
33aa687d JB |
660 | spi_execute(sdev, spi_read_buffer, DMA_FROM_DEVICE, |
661 | ptr, len, NULL); | |
1da177e4 LT |
662 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
663 | ||
664 | if (memcmp(buffer, ptr, len) != 0) | |
665 | return SPI_COMPARE_FAILURE; | |
666 | } | |
667 | return SPI_COMPARE_SUCCESS; | |
668 | } | |
669 | ||
670 | /* This is for the simplest form of Domain Validation: a read test | |
671 | * on the inquiry data from the device */ | |
672 | static enum spi_compare_returns | |
33aa687d | 673 | spi_dv_device_compare_inquiry(struct scsi_device *sdev, u8 *buffer, |
1da177e4 LT |
674 | u8 *ptr, const int retries) |
675 | { | |
33aa687d JB |
676 | int r, result; |
677 | const int len = sdev->inquiry_len; | |
1da177e4 LT |
678 | const char spi_inquiry[] = { |
679 | INQUIRY, 0, 0, 0, len, 0 | |
680 | }; | |
681 | ||
682 | for (r = 0; r < retries; r++) { | |
1da177e4 LT |
683 | memset(ptr, 0, len); |
684 | ||
33aa687d JB |
685 | result = spi_execute(sdev, spi_inquiry, DMA_FROM_DEVICE, |
686 | ptr, len, NULL); | |
1da177e4 | 687 | |
33aa687d | 688 | if(result || !scsi_device_online(sdev)) { |
1da177e4 LT |
689 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
690 | return SPI_COMPARE_FAILURE; | |
691 | } | |
692 | ||
693 | /* If we don't have the inquiry data already, the | |
694 | * first read gets it */ | |
695 | if (ptr == buffer) { | |
696 | ptr += len; | |
697 | --r; | |
698 | continue; | |
699 | } | |
700 | ||
701 | if (memcmp(buffer, ptr, len) != 0) | |
702 | /* failure */ | |
703 | return SPI_COMPARE_FAILURE; | |
704 | } | |
705 | return SPI_COMPARE_SUCCESS; | |
706 | } | |
707 | ||
708 | static enum spi_compare_returns | |
33aa687d | 709 | spi_dv_retrain(struct scsi_device *sdev, u8 *buffer, u8 *ptr, |
1da177e4 | 710 | enum spi_compare_returns |
33aa687d | 711 | (*compare_fn)(struct scsi_device *, u8 *, u8 *, int)) |
1da177e4 | 712 | { |
33aa687d | 713 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
9a8bc9b8 | 714 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 LT |
715 | int period = 0, prevperiod = 0; |
716 | enum spi_compare_returns retval; | |
717 | ||
718 | ||
719 | for (;;) { | |
720 | int newperiod; | |
33aa687d | 721 | retval = compare_fn(sdev, buffer, ptr, DV_LOOPS); |
1da177e4 LT |
722 | |
723 | if (retval == SPI_COMPARE_SUCCESS | |
724 | || retval == SPI_COMPARE_SKIP_TEST) | |
725 | break; | |
726 | ||
727 | /* OK, retrain, fallback */ | |
9a8bc9b8 JB |
728 | if (i->f->get_iu) |
729 | i->f->get_iu(starget); | |
730 | if (i->f->get_qas) | |
731 | i->f->get_qas(starget); | |
1da177e4 LT |
732 | if (i->f->get_period) |
733 | i->f->get_period(sdev->sdev_target); | |
9a8bc9b8 JB |
734 | |
735 | /* Here's the fallback sequence; first try turning off | |
736 | * IU, then QAS (if we can control them), then finally | |
737 | * fall down the periods */ | |
738 | if (i->f->set_iu && spi_iu(starget)) { | |
9ccfc756 | 739 | starget_printk(KERN_ERR, starget, "Domain Validation Disabing Information Units\n"); |
9a8bc9b8 JB |
740 | DV_SET(iu, 0); |
741 | } else if (i->f->set_qas && spi_qas(starget)) { | |
9ccfc756 | 742 | starget_printk(KERN_ERR, starget, "Domain Validation Disabing Quick Arbitration and Selection\n"); |
9a8bc9b8 JB |
743 | DV_SET(qas, 0); |
744 | } else { | |
745 | newperiod = spi_period(starget); | |
746 | period = newperiod > period ? newperiod : period; | |
747 | if (period < 0x0d) | |
748 | period++; | |
749 | else | |
750 | period += period >> 1; | |
751 | ||
752 | if (unlikely(period > 0xff || period == prevperiod)) { | |
753 | /* Total failure; set to async and return */ | |
9ccfc756 | 754 | starget_printk(KERN_ERR, starget, "Domain Validation Failure, dropping back to Asynchronous\n"); |
9a8bc9b8 JB |
755 | DV_SET(offset, 0); |
756 | return SPI_COMPARE_FAILURE; | |
757 | } | |
9ccfc756 | 758 | starget_printk(KERN_ERR, starget, "Domain Validation detected failure, dropping back\n"); |
9a8bc9b8 JB |
759 | DV_SET(period, period); |
760 | prevperiod = period; | |
1da177e4 | 761 | } |
1da177e4 LT |
762 | } |
763 | return retval; | |
764 | } | |
765 | ||
766 | static int | |
33aa687d | 767 | spi_dv_device_get_echo_buffer(struct scsi_device *sdev, u8 *buffer) |
1da177e4 | 768 | { |
33aa687d | 769 | int l, result; |
1da177e4 LT |
770 | |
771 | /* first off do a test unit ready. This can error out | |
772 | * because of reservations or some other reason. If it | |
773 | * fails, the device won't let us write to the echo buffer | |
774 | * so just return failure */ | |
775 | ||
776 | const char spi_test_unit_ready[] = { | |
777 | TEST_UNIT_READY, 0, 0, 0, 0, 0 | |
778 | }; | |
779 | ||
780 | const char spi_read_buffer_descriptor[] = { | |
781 | READ_BUFFER, 0x0b, 0, 0, 0, 0, 0, 0, 4, 0 | |
782 | }; | |
783 | ||
784 | ||
1da177e4 LT |
785 | /* We send a set of three TURs to clear any outstanding |
786 | * unit attention conditions if they exist (Otherwise the | |
787 | * buffer tests won't be happy). If the TUR still fails | |
788 | * (reservation conflict, device not ready, etc) just | |
789 | * skip the write tests */ | |
790 | for (l = 0; ; l++) { | |
33aa687d JB |
791 | result = spi_execute(sdev, spi_test_unit_ready, DMA_NONE, |
792 | NULL, 0, NULL); | |
1da177e4 | 793 | |
33aa687d | 794 | if(result) { |
1da177e4 LT |
795 | if(l >= 3) |
796 | return 0; | |
797 | } else { | |
798 | /* TUR succeeded */ | |
799 | break; | |
800 | } | |
801 | } | |
802 | ||
33aa687d JB |
803 | result = spi_execute(sdev, spi_read_buffer_descriptor, |
804 | DMA_FROM_DEVICE, buffer, 4, NULL); | |
1da177e4 | 805 | |
33aa687d | 806 | if (result) |
1da177e4 LT |
807 | /* Device has no echo buffer */ |
808 | return 0; | |
809 | ||
810 | return buffer[3] + ((buffer[2] & 0x1f) << 8); | |
811 | } | |
812 | ||
813 | static void | |
33aa687d | 814 | spi_dv_device_internal(struct scsi_device *sdev, u8 *buffer) |
1da177e4 | 815 | { |
33aa687d | 816 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
62a86129 | 817 | struct scsi_target *starget = sdev->sdev_target; |
60eef257 | 818 | struct Scsi_Host *shost = sdev->host; |
1da177e4 | 819 | int len = sdev->inquiry_len; |
2302827c JB |
820 | int min_period = spi_min_period(starget); |
821 | int max_width = spi_max_width(starget); | |
1da177e4 LT |
822 | /* first set us up for narrow async */ |
823 | DV_SET(offset, 0); | |
824 | DV_SET(width, 0); | |
2302827c | 825 | |
33aa687d | 826 | if (spi_dv_device_compare_inquiry(sdev, buffer, buffer, DV_LOOPS) |
1da177e4 | 827 | != SPI_COMPARE_SUCCESS) { |
9ccfc756 | 828 | starget_printk(KERN_ERR, starget, "Domain Validation Initial Inquiry Failed\n"); |
1da177e4 LT |
829 | /* FIXME: should probably offline the device here? */ |
830 | return; | |
831 | } | |
832 | ||
2302827c JB |
833 | if (!scsi_device_wide(sdev)) { |
834 | spi_max_width(starget) = 0; | |
835 | max_width = 0; | |
836 | } | |
837 | ||
1da177e4 | 838 | /* test width */ |
2302827c | 839 | if (i->f->set_width && max_width) { |
9a8bc9b8 | 840 | i->f->set_width(starget, 1); |
62a86129 | 841 | |
33aa687d | 842 | if (spi_dv_device_compare_inquiry(sdev, buffer, |
1da177e4 LT |
843 | buffer + len, |
844 | DV_LOOPS) | |
845 | != SPI_COMPARE_SUCCESS) { | |
9ccfc756 | 846 | starget_printk(KERN_ERR, starget, "Wide Transfers Fail\n"); |
9a8bc9b8 | 847 | i->f->set_width(starget, 0); |
2302827c JB |
848 | /* Make sure we don't force wide back on by asking |
849 | * for a transfer period that requires it */ | |
850 | max_width = 0; | |
851 | if (min_period < 10) | |
852 | min_period = 10; | |
1da177e4 LT |
853 | } |
854 | } | |
855 | ||
856 | if (!i->f->set_period) | |
857 | return; | |
858 | ||
859 | /* device can't handle synchronous */ | |
eb1dd68b | 860 | if (!scsi_device_sync(sdev) && !scsi_device_dt(sdev)) |
1da177e4 LT |
861 | return; |
862 | ||
349cd7cf JB |
863 | /* len == -1 is the signal that we need to ascertain the |
864 | * presence of an echo buffer before trying to use it. len == | |
865 | * 0 means we don't have an echo buffer */ | |
866 | len = -1; | |
1da177e4 LT |
867 | |
868 | retry: | |
869 | ||
870 | /* now set up to the maximum */ | |
62a86129 | 871 | DV_SET(offset, spi_max_offset(starget)); |
2302827c JB |
872 | DV_SET(period, min_period); |
873 | ||
9a8bc9b8 JB |
874 | /* try QAS requests; this should be harmless to set if the |
875 | * target supports it */ | |
dfdc58ba | 876 | if (scsi_device_qas(sdev)) { |
eb1dd68b | 877 | DV_SET(qas, 1); |
dfdc58ba JB |
878 | } else { |
879 | DV_SET(qas, 0); | |
880 | } | |
881 | ||
2302827c | 882 | if (scsi_device_ius(sdev) && min_period < 9) { |
dfdc58ba | 883 | /* This u320 (or u640). Set IU transfers */ |
eb1dd68b | 884 | DV_SET(iu, 1); |
dfdc58ba | 885 | /* Then set the optional parameters */ |
9a8bc9b8 JB |
886 | DV_SET(rd_strm, 1); |
887 | DV_SET(wr_flow, 1); | |
888 | DV_SET(rti, 1); | |
2302827c | 889 | if (min_period == 8) |
9a8bc9b8 | 890 | DV_SET(pcomp_en, 1); |
dfdc58ba JB |
891 | } else { |
892 | DV_SET(iu, 0); | |
9a8bc9b8 | 893 | } |
dfdc58ba | 894 | |
60eef257 JB |
895 | /* now that we've done all this, actually check the bus |
896 | * signal type (if known). Some devices are stupid on | |
897 | * a SE bus and still claim they can try LVD only settings */ | |
898 | if (i->f->get_signalling) | |
899 | i->f->get_signalling(shost); | |
900 | if (spi_signalling(shost) == SPI_SIGNAL_SE || | |
dfdc58ba JB |
901 | spi_signalling(shost) == SPI_SIGNAL_HVD || |
902 | !scsi_device_dt(sdev)) { | |
60eef257 | 903 | DV_SET(dt, 0); |
dfdc58ba JB |
904 | } else { |
905 | DV_SET(dt, 1); | |
906 | } | |
2302827c JB |
907 | /* set width last because it will pull all the other |
908 | * parameters down to required values */ | |
909 | DV_SET(width, max_width); | |
910 | ||
349cd7cf JB |
911 | /* Do the read only INQUIRY tests */ |
912 | spi_dv_retrain(sdev, buffer, buffer + sdev->inquiry_len, | |
913 | spi_dv_device_compare_inquiry); | |
914 | /* See if we actually managed to negotiate and sustain DT */ | |
915 | if (i->f->get_dt) | |
916 | i->f->get_dt(starget); | |
917 | ||
918 | /* see if the device has an echo buffer. If it does we can do | |
919 | * the SPI pattern write tests. Because of some broken | |
920 | * devices, we *only* try this on a device that has actually | |
921 | * negotiated DT */ | |
922 | ||
923 | if (len == -1 && spi_dt(starget)) | |
924 | len = spi_dv_device_get_echo_buffer(sdev, buffer); | |
1da177e4 | 925 | |
349cd7cf | 926 | if (len <= 0) { |
9ccfc756 | 927 | starget_printk(KERN_INFO, starget, "Domain Validation skipping write tests\n"); |
1da177e4 LT |
928 | return; |
929 | } | |
930 | ||
931 | if (len > SPI_MAX_ECHO_BUFFER_SIZE) { | |
9ccfc756 | 932 | starget_printk(KERN_WARNING, starget, "Echo buffer size %d is too big, trimming to %d\n", len, SPI_MAX_ECHO_BUFFER_SIZE); |
1da177e4 LT |
933 | len = SPI_MAX_ECHO_BUFFER_SIZE; |
934 | } | |
935 | ||
33aa687d | 936 | if (spi_dv_retrain(sdev, buffer, buffer + len, |
1da177e4 LT |
937 | spi_dv_device_echo_buffer) |
938 | == SPI_COMPARE_SKIP_TEST) { | |
939 | /* OK, the stupid drive can't do a write echo buffer | |
940 | * test after all, fall back to the read tests */ | |
941 | len = 0; | |
942 | goto retry; | |
943 | } | |
944 | } | |
945 | ||
946 | ||
947 | /** spi_dv_device - Do Domain Validation on the device | |
948 | * @sdev: scsi device to validate | |
949 | * | |
950 | * Performs the domain validation on the given device in the | |
951 | * current execution thread. Since DV operations may sleep, | |
952 | * the current thread must have user context. Also no SCSI | |
953 | * related locks that would deadlock I/O issued by the DV may | |
954 | * be held. | |
955 | */ | |
956 | void | |
957 | spi_dv_device(struct scsi_device *sdev) | |
958 | { | |
1da177e4 LT |
959 | struct scsi_target *starget = sdev->sdev_target; |
960 | u8 *buffer; | |
961 | const int len = SPI_MAX_ECHO_BUFFER_SIZE*2; | |
962 | ||
1da177e4 | 963 | if (unlikely(scsi_device_get(sdev))) |
33aa687d | 964 | return; |
1da177e4 | 965 | |
dfdc58ba JB |
966 | if (unlikely(spi_dv_in_progress(starget))) |
967 | return; | |
968 | spi_dv_in_progress(starget) = 1; | |
969 | ||
24669f75 | 970 | buffer = kzalloc(len, GFP_KERNEL); |
1da177e4 LT |
971 | |
972 | if (unlikely(!buffer)) | |
973 | goto out_put; | |
974 | ||
1da177e4 LT |
975 | /* We need to verify that the actual device will quiesce; the |
976 | * later target quiesce is just a nice to have */ | |
977 | if (unlikely(scsi_device_quiesce(sdev))) | |
978 | goto out_free; | |
979 | ||
980 | scsi_target_quiesce(starget); | |
981 | ||
982 | spi_dv_pending(starget) = 1; | |
d158d261 | 983 | mutex_lock(&spi_dv_mutex(starget)); |
1da177e4 | 984 | |
9ccfc756 | 985 | starget_printk(KERN_INFO, starget, "Beginning Domain Validation\n"); |
1da177e4 | 986 | |
33aa687d | 987 | spi_dv_device_internal(sdev, buffer); |
1da177e4 | 988 | |
9ccfc756 | 989 | starget_printk(KERN_INFO, starget, "Ending Domain Validation\n"); |
1da177e4 | 990 | |
d158d261 | 991 | mutex_unlock(&spi_dv_mutex(starget)); |
1da177e4 LT |
992 | spi_dv_pending(starget) = 0; |
993 | ||
994 | scsi_target_resume(starget); | |
995 | ||
996 | spi_initial_dv(starget) = 1; | |
997 | ||
998 | out_free: | |
999 | kfree(buffer); | |
1000 | out_put: | |
dfdc58ba | 1001 | spi_dv_in_progress(starget) = 0; |
1da177e4 | 1002 | scsi_device_put(sdev); |
1da177e4 LT |
1003 | } |
1004 | EXPORT_SYMBOL(spi_dv_device); | |
1005 | ||
1006 | struct work_queue_wrapper { | |
1007 | struct work_struct work; | |
1008 | struct scsi_device *sdev; | |
1009 | }; | |
1010 | ||
1011 | static void | |
c4028958 | 1012 | spi_dv_device_work_wrapper(struct work_struct *work) |
1da177e4 | 1013 | { |
c4028958 DH |
1014 | struct work_queue_wrapper *wqw = |
1015 | container_of(work, struct work_queue_wrapper, work); | |
1da177e4 LT |
1016 | struct scsi_device *sdev = wqw->sdev; |
1017 | ||
1018 | kfree(wqw); | |
1019 | spi_dv_device(sdev); | |
1020 | spi_dv_pending(sdev->sdev_target) = 0; | |
1021 | scsi_device_put(sdev); | |
1022 | } | |
1023 | ||
1024 | ||
1025 | /** | |
1026 | * spi_schedule_dv_device - schedule domain validation to occur on the device | |
1027 | * @sdev: The device to validate | |
1028 | * | |
1029 | * Identical to spi_dv_device() above, except that the DV will be | |
1030 | * scheduled to occur in a workqueue later. All memory allocations | |
1031 | * are atomic, so may be called from any context including those holding | |
1032 | * SCSI locks. | |
1033 | */ | |
1034 | void | |
1035 | spi_schedule_dv_device(struct scsi_device *sdev) | |
1036 | { | |
1037 | struct work_queue_wrapper *wqw = | |
1038 | kmalloc(sizeof(struct work_queue_wrapper), GFP_ATOMIC); | |
1039 | ||
1040 | if (unlikely(!wqw)) | |
1041 | return; | |
1042 | ||
1043 | if (unlikely(spi_dv_pending(sdev->sdev_target))) { | |
1044 | kfree(wqw); | |
1045 | return; | |
1046 | } | |
1047 | /* Set pending early (dv_device doesn't check it, only sets it) */ | |
1048 | spi_dv_pending(sdev->sdev_target) = 1; | |
1049 | if (unlikely(scsi_device_get(sdev))) { | |
1050 | kfree(wqw); | |
1051 | spi_dv_pending(sdev->sdev_target) = 0; | |
1052 | return; | |
1053 | } | |
1054 | ||
c4028958 | 1055 | INIT_WORK(&wqw->work, spi_dv_device_work_wrapper); |
1da177e4 LT |
1056 | wqw->sdev = sdev; |
1057 | ||
1058 | schedule_work(&wqw->work); | |
1059 | } | |
1060 | EXPORT_SYMBOL(spi_schedule_dv_device); | |
1061 | ||
1062 | /** | |
1063 | * spi_display_xfer_agreement - Print the current target transfer agreement | |
1064 | * @starget: The target for which to display the agreement | |
1065 | * | |
1066 | * Each SPI port is required to maintain a transfer agreement for each | |
1067 | * other port on the bus. This function prints a one-line summary of | |
1068 | * the current agreement; more detailed information is available in sysfs. | |
1069 | */ | |
1070 | void spi_display_xfer_agreement(struct scsi_target *starget) | |
1071 | { | |
1072 | struct spi_transport_attrs *tp; | |
1073 | tp = (struct spi_transport_attrs *)&starget->starget_data; | |
1074 | ||
1075 | if (tp->offset > 0 && tp->period > 0) { | |
1076 | unsigned int picosec, kb100; | |
1077 | char *scsi = "FAST-?"; | |
1078 | char tmp[8]; | |
1079 | ||
1080 | if (tp->period <= SPI_STATIC_PPR) { | |
1081 | picosec = ppr_to_ps[tp->period]; | |
1082 | switch (tp->period) { | |
1083 | case 7: scsi = "FAST-320"; break; | |
1084 | case 8: scsi = "FAST-160"; break; | |
1085 | case 9: scsi = "FAST-80"; break; | |
1086 | case 10: | |
1087 | case 11: scsi = "FAST-40"; break; | |
1088 | case 12: scsi = "FAST-20"; break; | |
1089 | } | |
1090 | } else { | |
1091 | picosec = tp->period * 4000; | |
1092 | if (tp->period < 25) | |
1093 | scsi = "FAST-20"; | |
1094 | else if (tp->period < 50) | |
1095 | scsi = "FAST-10"; | |
1096 | else | |
1097 | scsi = "FAST-5"; | |
1098 | } | |
1099 | ||
1100 | kb100 = (10000000 + picosec / 2) / picosec; | |
1101 | if (tp->width) | |
1102 | kb100 *= 2; | |
1103 | sprint_frac(tmp, picosec, 1000); | |
1104 | ||
1105 | dev_info(&starget->dev, | |
d872ebe4 JB |
1106 | "%s %sSCSI %d.%d MB/s %s%s%s%s%s%s%s%s (%s ns, offset %d)\n", |
1107 | scsi, tp->width ? "WIDE " : "", kb100/10, kb100 % 10, | |
1108 | tp->dt ? "DT" : "ST", | |
1109 | tp->iu ? " IU" : "", | |
1110 | tp->qas ? " QAS" : "", | |
1111 | tp->rd_strm ? " RDSTRM" : "", | |
1112 | tp->rti ? " RTI" : "", | |
1113 | tp->wr_flow ? " WRFLOW" : "", | |
1114 | tp->pcomp_en ? " PCOMP" : "", | |
1115 | tp->hold_mcs ? " HMCS" : "", | |
1116 | tmp, tp->offset); | |
1da177e4 | 1117 | } else { |
493ff4ee | 1118 | dev_info(&starget->dev, "%sasynchronous\n", |
1da177e4 LT |
1119 | tp->width ? "wide " : ""); |
1120 | } | |
1121 | } | |
1122 | EXPORT_SYMBOL(spi_display_xfer_agreement); | |
1123 | ||
6ea3c0b2 MW |
1124 | int spi_populate_width_msg(unsigned char *msg, int width) |
1125 | { | |
1126 | msg[0] = EXTENDED_MESSAGE; | |
1127 | msg[1] = 2; | |
1128 | msg[2] = EXTENDED_WDTR; | |
1129 | msg[3] = width; | |
1130 | return 4; | |
1131 | } | |
38e14f89 | 1132 | EXPORT_SYMBOL_GPL(spi_populate_width_msg); |
6ea3c0b2 MW |
1133 | |
1134 | int spi_populate_sync_msg(unsigned char *msg, int period, int offset) | |
1135 | { | |
1136 | msg[0] = EXTENDED_MESSAGE; | |
1137 | msg[1] = 3; | |
1138 | msg[2] = EXTENDED_SDTR; | |
1139 | msg[3] = period; | |
1140 | msg[4] = offset; | |
1141 | return 5; | |
1142 | } | |
38e14f89 | 1143 | EXPORT_SYMBOL_GPL(spi_populate_sync_msg); |
6ea3c0b2 MW |
1144 | |
1145 | int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, | |
1146 | int width, int options) | |
1147 | { | |
1148 | msg[0] = EXTENDED_MESSAGE; | |
1149 | msg[1] = 6; | |
1150 | msg[2] = EXTENDED_PPR; | |
1151 | msg[3] = period; | |
1152 | msg[4] = 0; | |
1153 | msg[5] = offset; | |
1154 | msg[6] = width; | |
1155 | msg[7] = options; | |
1156 | return 8; | |
1157 | } | |
38e14f89 | 1158 | EXPORT_SYMBOL_GPL(spi_populate_ppr_msg); |
6ea3c0b2 | 1159 | |
410ca5c7 MW |
1160 | #ifdef CONFIG_SCSI_CONSTANTS |
1161 | static const char * const one_byte_msgs[] = { | |
72df0ebf | 1162 | /* 0x00 */ "Task Complete", NULL /* Extended Message */, "Save Pointers", |
410ca5c7 | 1163 | /* 0x03 */ "Restore Pointers", "Disconnect", "Initiator Error", |
72df0ebf | 1164 | /* 0x06 */ "Abort Task Set", "Message Reject", "Nop", "Message Parity Error", |
410ca5c7 | 1165 | /* 0x0a */ "Linked Command Complete", "Linked Command Complete w/flag", |
72df0ebf MW |
1166 | /* 0x0c */ "Target Reset", "Abort Task", "Clear Task Set", |
1167 | /* 0x0f */ "Initiate Recovery", "Release Recovery", | |
1168 | /* 0x11 */ "Terminate Process", "Continue Task", "Target Transfer Disable", | |
1169 | /* 0x14 */ NULL, NULL, "Clear ACA", "LUN Reset" | |
410ca5c7 | 1170 | }; |
410ca5c7 MW |
1171 | |
1172 | static const char * const two_byte_msgs[] = { | |
47972153 | 1173 | /* 0x20 */ "Simple Queue Tag", "Head of Queue Tag", "Ordered Queue Tag", |
72df0ebf | 1174 | /* 0x23 */ "Ignore Wide Residue", "ACA" |
410ca5c7 | 1175 | }; |
410ca5c7 MW |
1176 | |
1177 | static const char * const extended_msgs[] = { | |
1178 | /* 0x00 */ "Modify Data Pointer", "Synchronous Data Transfer Request", | |
ef72582e | 1179 | /* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request", |
fc25307d | 1180 | /* 0x04 */ "Parallel Protocol Request", "Modify Bidirectional Data Pointer" |
410ca5c7 | 1181 | }; |
410ca5c7 | 1182 | |
bdd70f2c | 1183 | static void print_nego(const unsigned char *msg, int per, int off, int width) |
ef72582e MW |
1184 | { |
1185 | if (per) { | |
1186 | char buf[20]; | |
1187 | period_to_str(buf, msg[per]); | |
1188 | printk("period = %s ns ", buf); | |
1189 | } | |
1190 | ||
1191 | if (off) | |
1192 | printk("offset = %d ", msg[off]); | |
1193 | if (width) | |
1194 | printk("width = %d ", 8 << msg[width]); | |
1195 | } | |
410ca5c7 | 1196 | |
fc25307d MW |
1197 | static void print_ptr(const unsigned char *msg, int msb, const char *desc) |
1198 | { | |
1199 | int ptr = (msg[msb] << 24) | (msg[msb+1] << 16) | (msg[msb+2] << 8) | | |
1200 | msg[msb+3]; | |
1201 | printk("%s = %d ", desc, ptr); | |
1202 | } | |
1203 | ||
1abfd370 | 1204 | int spi_print_msg(const unsigned char *msg) |
410ca5c7 | 1205 | { |
72df0ebf | 1206 | int len = 1, i; |
410ca5c7 | 1207 | if (msg[0] == EXTENDED_MESSAGE) { |
fc25307d MW |
1208 | len = 2 + msg[1]; |
1209 | if (len == 2) | |
1210 | len += 256; | |
b32aaffc | 1211 | if (msg[2] < ARRAY_SIZE(extended_msgs)) |
410ca5c7 MW |
1212 | printk ("%s ", extended_msgs[msg[2]]); |
1213 | else | |
1214 | printk ("Extended Message, reserved code (0x%02x) ", | |
1215 | (int) msg[2]); | |
1216 | switch (msg[2]) { | |
1217 | case EXTENDED_MODIFY_DATA_POINTER: | |
fc25307d | 1218 | print_ptr(msg, 3, "pointer"); |
410ca5c7 MW |
1219 | break; |
1220 | case EXTENDED_SDTR: | |
ef72582e | 1221 | print_nego(msg, 3, 4, 0); |
410ca5c7 MW |
1222 | break; |
1223 | case EXTENDED_WDTR: | |
ef72582e MW |
1224 | print_nego(msg, 0, 0, 3); |
1225 | break; | |
1226 | case EXTENDED_PPR: | |
1227 | print_nego(msg, 3, 5, 6); | |
410ca5c7 | 1228 | break; |
fc25307d MW |
1229 | case EXTENDED_MODIFY_BIDI_DATA_PTR: |
1230 | print_ptr(msg, 3, "out"); | |
1231 | print_ptr(msg, 7, "in"); | |
1232 | break; | |
410ca5c7 MW |
1233 | default: |
1234 | for (i = 2; i < len; ++i) | |
1235 | printk("%02x ", msg[i]); | |
1236 | } | |
1237 | /* Identify */ | |
1238 | } else if (msg[0] & 0x80) { | |
1239 | printk("Identify disconnect %sallowed %s %d ", | |
1240 | (msg[0] & 0x40) ? "" : "not ", | |
1241 | (msg[0] & 0x20) ? "target routine" : "lun", | |
1242 | msg[0] & 0x7); | |
410ca5c7 MW |
1243 | /* Normal One byte */ |
1244 | } else if (msg[0] < 0x1f) { | |
72df0ebf | 1245 | if (msg[0] < ARRAY_SIZE(one_byte_msgs) && one_byte_msgs[msg[0]]) |
e24d873d | 1246 | printk("%s ", one_byte_msgs[msg[0]]); |
410ca5c7 MW |
1247 | else |
1248 | printk("reserved (%02x) ", msg[0]); | |
72df0ebf MW |
1249 | } else if (msg[0] == 0x55) { |
1250 | printk("QAS Request "); | |
410ca5c7 MW |
1251 | /* Two byte */ |
1252 | } else if (msg[0] <= 0x2f) { | |
b32aaffc | 1253 | if ((msg[0] - 0x20) < ARRAY_SIZE(two_byte_msgs)) |
410ca5c7 MW |
1254 | printk("%s %02x ", two_byte_msgs[msg[0] - 0x20], |
1255 | msg[1]); | |
1256 | else | |
1257 | printk("reserved two byte (%02x %02x) ", | |
1258 | msg[0], msg[1]); | |
1259 | len = 2; | |
1260 | } else | |
e24d873d | 1261 | printk("reserved "); |
410ca5c7 MW |
1262 | return len; |
1263 | } | |
1abfd370 | 1264 | EXPORT_SYMBOL(spi_print_msg); |
410ca5c7 MW |
1265 | |
1266 | #else /* ifndef CONFIG_SCSI_CONSTANTS */ | |
1267 | ||
1abfd370 | 1268 | int spi_print_msg(const unsigned char *msg) |
410ca5c7 | 1269 | { |
72df0ebf | 1270 | int len = 1, i; |
410ca5c7 MW |
1271 | |
1272 | if (msg[0] == EXTENDED_MESSAGE) { | |
fc25307d MW |
1273 | len = 2 + msg[1]; |
1274 | if (len == 2) | |
1275 | len += 256; | |
410ca5c7 MW |
1276 | for (i = 0; i < len; ++i) |
1277 | printk("%02x ", msg[i]); | |
1278 | /* Identify */ | |
1279 | } else if (msg[0] & 0x80) { | |
1280 | printk("%02x ", msg[0]); | |
410ca5c7 | 1281 | /* Normal One byte */ |
597705aa | 1282 | } else if ((msg[0] < 0x1f) || (msg[0] == 0x55)) { |
410ca5c7 | 1283 | printk("%02x ", msg[0]); |
410ca5c7 MW |
1284 | /* Two byte */ |
1285 | } else if (msg[0] <= 0x2f) { | |
1286 | printk("%02x %02x", msg[0], msg[1]); | |
1287 | len = 2; | |
1288 | } else | |
1289 | printk("%02x ", msg[0]); | |
1290 | return len; | |
1291 | } | |
1abfd370 | 1292 | EXPORT_SYMBOL(spi_print_msg); |
410ca5c7 MW |
1293 | #endif /* ! CONFIG_SCSI_CONSTANTS */ |
1294 | ||
1da177e4 LT |
1295 | static int spi_device_match(struct attribute_container *cont, |
1296 | struct device *dev) | |
1297 | { | |
1298 | struct scsi_device *sdev; | |
1299 | struct Scsi_Host *shost; | |
10c1b889 | 1300 | struct spi_internal *i; |
1da177e4 LT |
1301 | |
1302 | if (!scsi_is_sdev_device(dev)) | |
1303 | return 0; | |
1304 | ||
1305 | sdev = to_scsi_device(dev); | |
1306 | shost = sdev->host; | |
1307 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1308 | != &spi_host_class.class) | |
1309 | return 0; | |
1310 | /* Note: this class has no device attributes, so it has | |
1311 | * no per-HBA allocation and thus we don't need to distinguish | |
1312 | * the attribute containers for the device */ | |
10c1b889 JB |
1313 | i = to_spi_internal(shost->transportt); |
1314 | if (i->f->deny_binding && i->f->deny_binding(sdev->sdev_target)) | |
1315 | return 0; | |
1da177e4 LT |
1316 | return 1; |
1317 | } | |
1318 | ||
1319 | static int spi_target_match(struct attribute_container *cont, | |
1320 | struct device *dev) | |
1321 | { | |
1322 | struct Scsi_Host *shost; | |
10c1b889 | 1323 | struct scsi_target *starget; |
1da177e4 LT |
1324 | struct spi_internal *i; |
1325 | ||
1326 | if (!scsi_is_target_device(dev)) | |
1327 | return 0; | |
1328 | ||
1329 | shost = dev_to_shost(dev->parent); | |
1330 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1331 | != &spi_host_class.class) | |
1332 | return 0; | |
1333 | ||
1334 | i = to_spi_internal(shost->transportt); | |
10c1b889 JB |
1335 | starget = to_scsi_target(dev); |
1336 | ||
1337 | if (i->f->deny_binding && i->f->deny_binding(starget)) | |
1338 | return 0; | |
1339 | ||
1da177e4 LT |
1340 | return &i->t.target_attrs.ac == cont; |
1341 | } | |
1342 | ||
1343 | static DECLARE_TRANSPORT_CLASS(spi_transport_class, | |
1344 | "spi_transport", | |
1345 | spi_setup_transport_attrs, | |
1346 | NULL, | |
9b161a4d | 1347 | spi_target_configure); |
1da177e4 LT |
1348 | |
1349 | static DECLARE_ANON_TRANSPORT_CLASS(spi_device_class, | |
1350 | spi_device_match, | |
1351 | spi_device_configure); | |
1352 | ||
9b161a4d | 1353 | static struct attribute *host_attributes[] = { |
ee959b00 | 1354 | &dev_attr_signalling.attr, |
9b161a4d JB |
1355 | NULL |
1356 | }; | |
1357 | ||
1358 | static struct attribute_group host_attribute_group = { | |
1359 | .attrs = host_attributes, | |
1360 | }; | |
1361 | ||
1362 | static int spi_host_configure(struct transport_container *tc, | |
1363 | struct device *dev, | |
ee959b00 | 1364 | struct device *cdev) |
9b161a4d JB |
1365 | { |
1366 | struct kobject *kobj = &cdev->kobj; | |
1367 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1368 | struct spi_internal *si = to_spi_internal(shost->transportt); | |
ee959b00 | 1369 | struct attribute *attr = &dev_attr_signalling.attr; |
9b161a4d JB |
1370 | int rc = 0; |
1371 | ||
1372 | if (si->f->set_signalling) | |
1373 | rc = sysfs_chmod_file(kobj, attr, attr->mode | S_IWUSR); | |
1374 | ||
1375 | return rc; | |
1376 | } | |
1377 | ||
1378 | /* returns true if we should be showing the variable. Also | |
1379 | * overloads the return by setting 1<<1 if the attribute should | |
1380 | * be writeable */ | |
1381 | #define TARGET_ATTRIBUTE_HELPER(name) \ | |
352f6bb4 JB |
1382 | (si->f->show_##name ? S_IRUGO : 0) | \ |
1383 | (si->f->set_##name ? S_IWUSR : 0) | |
9b161a4d | 1384 | |
352f6bb4 JB |
1385 | static mode_t target_attribute_is_visible(struct kobject *kobj, |
1386 | struct attribute *attr, int i) | |
9b161a4d | 1387 | { |
ee959b00 | 1388 | struct device *cdev = container_of(kobj, struct device, kobj); |
9b161a4d JB |
1389 | struct scsi_target *starget = transport_class_to_starget(cdev); |
1390 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1391 | struct spi_internal *si = to_spi_internal(shost->transportt); | |
1392 | ||
ee959b00 | 1393 | if (attr == &dev_attr_period.attr && |
9b161a4d JB |
1394 | spi_support_sync(starget)) |
1395 | return TARGET_ATTRIBUTE_HELPER(period); | |
ee959b00 | 1396 | else if (attr == &dev_attr_min_period.attr && |
9b161a4d JB |
1397 | spi_support_sync(starget)) |
1398 | return TARGET_ATTRIBUTE_HELPER(period); | |
ee959b00 | 1399 | else if (attr == &dev_attr_offset.attr && |
9b161a4d JB |
1400 | spi_support_sync(starget)) |
1401 | return TARGET_ATTRIBUTE_HELPER(offset); | |
ee959b00 | 1402 | else if (attr == &dev_attr_max_offset.attr && |
9b161a4d JB |
1403 | spi_support_sync(starget)) |
1404 | return TARGET_ATTRIBUTE_HELPER(offset); | |
ee959b00 | 1405 | else if (attr == &dev_attr_width.attr && |
9b161a4d JB |
1406 | spi_support_wide(starget)) |
1407 | return TARGET_ATTRIBUTE_HELPER(width); | |
ee959b00 | 1408 | else if (attr == &dev_attr_max_width.attr && |
9b161a4d JB |
1409 | spi_support_wide(starget)) |
1410 | return TARGET_ATTRIBUTE_HELPER(width); | |
ee959b00 | 1411 | else if (attr == &dev_attr_iu.attr && |
9b161a4d JB |
1412 | spi_support_ius(starget)) |
1413 | return TARGET_ATTRIBUTE_HELPER(iu); | |
ee959b00 | 1414 | else if (attr == &dev_attr_dt.attr && |
9b161a4d JB |
1415 | spi_support_dt(starget)) |
1416 | return TARGET_ATTRIBUTE_HELPER(dt); | |
ee959b00 | 1417 | else if (attr == &dev_attr_qas.attr && |
9b161a4d JB |
1418 | spi_support_qas(starget)) |
1419 | return TARGET_ATTRIBUTE_HELPER(qas); | |
ee959b00 | 1420 | else if (attr == &dev_attr_wr_flow.attr && |
9b161a4d JB |
1421 | spi_support_ius(starget)) |
1422 | return TARGET_ATTRIBUTE_HELPER(wr_flow); | |
ee959b00 | 1423 | else if (attr == &dev_attr_rd_strm.attr && |
9b161a4d JB |
1424 | spi_support_ius(starget)) |
1425 | return TARGET_ATTRIBUTE_HELPER(rd_strm); | |
ee959b00 | 1426 | else if (attr == &dev_attr_rti.attr && |
9b161a4d JB |
1427 | spi_support_ius(starget)) |
1428 | return TARGET_ATTRIBUTE_HELPER(rti); | |
ee959b00 | 1429 | else if (attr == &dev_attr_pcomp_en.attr && |
9b161a4d JB |
1430 | spi_support_ius(starget)) |
1431 | return TARGET_ATTRIBUTE_HELPER(pcomp_en); | |
ee959b00 | 1432 | else if (attr == &dev_attr_hold_mcs.attr && |
9b161a4d JB |
1433 | spi_support_ius(starget)) |
1434 | return TARGET_ATTRIBUTE_HELPER(hold_mcs); | |
ee959b00 | 1435 | else if (attr == &dev_attr_revalidate.attr) |
352f6bb4 | 1436 | return S_IWUSR; |
9b161a4d JB |
1437 | |
1438 | return 0; | |
1439 | } | |
1440 | ||
1441 | static struct attribute *target_attributes[] = { | |
ee959b00 TJ |
1442 | &dev_attr_period.attr, |
1443 | &dev_attr_min_period.attr, | |
1444 | &dev_attr_offset.attr, | |
1445 | &dev_attr_max_offset.attr, | |
1446 | &dev_attr_width.attr, | |
1447 | &dev_attr_max_width.attr, | |
1448 | &dev_attr_iu.attr, | |
1449 | &dev_attr_dt.attr, | |
1450 | &dev_attr_qas.attr, | |
1451 | &dev_attr_wr_flow.attr, | |
1452 | &dev_attr_rd_strm.attr, | |
1453 | &dev_attr_rti.attr, | |
1454 | &dev_attr_pcomp_en.attr, | |
1455 | &dev_attr_hold_mcs.attr, | |
1456 | &dev_attr_revalidate.attr, | |
9b161a4d JB |
1457 | NULL |
1458 | }; | |
1459 | ||
1460 | static struct attribute_group target_attribute_group = { | |
1461 | .attrs = target_attributes, | |
1462 | .is_visible = target_attribute_is_visible, | |
1463 | }; | |
1464 | ||
1465 | static int spi_target_configure(struct transport_container *tc, | |
1466 | struct device *dev, | |
ee959b00 | 1467 | struct device *cdev) |
9b161a4d JB |
1468 | { |
1469 | struct kobject *kobj = &cdev->kobj; | |
352f6bb4 JB |
1470 | |
1471 | /* force an update based on parameters read from the device */ | |
1472 | sysfs_update_group(kobj, &target_attribute_group); | |
9b161a4d JB |
1473 | |
1474 | return 0; | |
1475 | } | |
1476 | ||
1da177e4 LT |
1477 | struct scsi_transport_template * |
1478 | spi_attach_transport(struct spi_function_template *ft) | |
1479 | { | |
24669f75 JS |
1480 | struct spi_internal *i = kzalloc(sizeof(struct spi_internal), |
1481 | GFP_KERNEL); | |
1482 | ||
1da177e4 LT |
1483 | if (unlikely(!i)) |
1484 | return NULL; | |
1485 | ||
1da177e4 | 1486 | i->t.target_attrs.ac.class = &spi_transport_class.class; |
9b161a4d | 1487 | i->t.target_attrs.ac.grp = &target_attribute_group; |
1da177e4 LT |
1488 | i->t.target_attrs.ac.match = spi_target_match; |
1489 | transport_container_register(&i->t.target_attrs); | |
1490 | i->t.target_size = sizeof(struct spi_transport_attrs); | |
1491 | i->t.host_attrs.ac.class = &spi_host_class.class; | |
9b161a4d | 1492 | i->t.host_attrs.ac.grp = &host_attribute_group; |
1da177e4 LT |
1493 | i->t.host_attrs.ac.match = spi_host_match; |
1494 | transport_container_register(&i->t.host_attrs); | |
1495 | i->t.host_size = sizeof(struct spi_host_attrs); | |
1496 | i->f = ft; | |
1497 | ||
1da177e4 LT |
1498 | return &i->t; |
1499 | } | |
1500 | EXPORT_SYMBOL(spi_attach_transport); | |
1501 | ||
1502 | void spi_release_transport(struct scsi_transport_template *t) | |
1503 | { | |
1504 | struct spi_internal *i = to_spi_internal(t); | |
1505 | ||
1506 | transport_container_unregister(&i->t.target_attrs); | |
1507 | transport_container_unregister(&i->t.host_attrs); | |
1508 | ||
1509 | kfree(i); | |
1510 | } | |
1511 | EXPORT_SYMBOL(spi_release_transport); | |
1512 | ||
1513 | static __init int spi_transport_init(void) | |
1514 | { | |
1515 | int error = transport_class_register(&spi_transport_class); | |
1516 | if (error) | |
1517 | return error; | |
1518 | error = anon_transport_class_register(&spi_device_class); | |
1519 | return transport_class_register(&spi_host_class); | |
1520 | } | |
1521 | ||
1522 | static void __exit spi_transport_exit(void) | |
1523 | { | |
1524 | transport_class_unregister(&spi_transport_class); | |
1525 | anon_transport_class_unregister(&spi_device_class); | |
1526 | transport_class_unregister(&spi_host_class); | |
1527 | } | |
1528 | ||
1529 | MODULE_AUTHOR("Martin Hicks"); | |
1530 | MODULE_DESCRIPTION("SPI Transport Attributes"); | |
1531 | MODULE_LICENSE("GPL"); | |
1532 | ||
1533 | module_init(spi_transport_init); | |
1534 | module_exit(spi_transport_exit); |