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> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
1da177e4 LT |
29 | #include <scsi/scsi.h> |
30 | #include "scsi_priv.h" | |
31 | #include <scsi/scsi_device.h> | |
32 | #include <scsi/scsi_host.h> | |
33aa687d | 33 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
34 | #include <scsi/scsi_eh.h> |
35 | #include <scsi/scsi_transport.h> | |
36 | #include <scsi/scsi_transport_spi.h> | |
37 | ||
d872ebe4 | 38 | #define SPI_NUM_ATTRS 14 /* increase this if you add attributes */ |
1da177e4 LT |
39 | #define SPI_OTHER_ATTRS 1 /* Increase this if you add "always |
40 | * on" attributes */ | |
41 | #define SPI_HOST_ATTRS 1 | |
42 | ||
43 | #define SPI_MAX_ECHO_BUFFER_SIZE 4096 | |
44 | ||
949bf797 JB |
45 | #define DV_LOOPS 3 |
46 | #define DV_TIMEOUT (10*HZ) | |
47 | #define DV_RETRIES 3 /* should only need at most | |
48 | * two cc/ua clears */ | |
49 | ||
a9e0edb6 JB |
50 | /* Our blacklist flags */ |
51 | enum { | |
52 | SPI_BLIST_NOIUS = 0x1, | |
53 | }; | |
54 | ||
55 | /* blacklist table, modelled on scsi_devinfo.c */ | |
56 | static struct { | |
57 | char *vendor; | |
58 | char *model; | |
59 | unsigned flags; | |
60 | } spi_static_device_list[] __initdata = { | |
61 | {"HP", "Ultrium 3-SCSI", SPI_BLIST_NOIUS }, | |
62 | {"IBM", "ULTRIUM-TD3", SPI_BLIST_NOIUS }, | |
63 | {NULL, NULL, 0} | |
64 | }; | |
65 | ||
1da177e4 | 66 | /* Private data accessors (keep these out of the header file) */ |
dfdc58ba | 67 | #define spi_dv_in_progress(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_in_progress) |
d158d261 | 68 | #define spi_dv_mutex(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_mutex) |
1da177e4 LT |
69 | |
70 | struct spi_internal { | |
71 | struct scsi_transport_template t; | |
72 | struct spi_function_template *f; | |
1da177e4 LT |
73 | }; |
74 | ||
75 | #define to_spi_internal(tmpl) container_of(tmpl, struct spi_internal, t) | |
76 | ||
77 | static const int ppr_to_ps[] = { | |
78 | /* The PPR values 0-6 are reserved, fill them in when | |
79 | * the committee defines them */ | |
80 | -1, /* 0x00 */ | |
81 | -1, /* 0x01 */ | |
82 | -1, /* 0x02 */ | |
83 | -1, /* 0x03 */ | |
84 | -1, /* 0x04 */ | |
85 | -1, /* 0x05 */ | |
86 | -1, /* 0x06 */ | |
87 | 3125, /* 0x07 */ | |
88 | 6250, /* 0x08 */ | |
89 | 12500, /* 0x09 */ | |
90 | 25000, /* 0x0a */ | |
91 | 30300, /* 0x0b */ | |
92 | 50000, /* 0x0c */ | |
93 | }; | |
94 | /* The PPR values at which you calculate the period in ns by multiplying | |
95 | * by 4 */ | |
96 | #define SPI_STATIC_PPR 0x0c | |
97 | ||
98 | static int sprint_frac(char *dest, int value, int denom) | |
99 | { | |
100 | int frac = value % denom; | |
101 | int result = sprintf(dest, "%d", value / denom); | |
102 | ||
103 | if (frac == 0) | |
104 | return result; | |
105 | dest[result++] = '.'; | |
106 | ||
107 | do { | |
108 | denom /= 10; | |
109 | sprintf(dest + result, "%d", frac / denom); | |
110 | result++; | |
111 | frac %= denom; | |
112 | } while (frac); | |
113 | ||
114 | dest[result++] = '\0'; | |
115 | return result; | |
116 | } | |
117 | ||
33aa687d JB |
118 | static int spi_execute(struct scsi_device *sdev, const void *cmd, |
119 | enum dma_data_direction dir, | |
120 | void *buffer, unsigned bufflen, | |
121 | struct scsi_sense_hdr *sshdr) | |
949bf797 | 122 | { |
33aa687d JB |
123 | int i, result; |
124 | unsigned char sense[SCSI_SENSE_BUFFERSIZE]; | |
949bf797 JB |
125 | |
126 | for(i = 0; i < DV_RETRIES; i++) { | |
33aa687d JB |
127 | result = scsi_execute(sdev, cmd, dir, buffer, bufflen, |
128 | sense, DV_TIMEOUT, /* retries */ 1, | |
6000a368 MC |
129 | REQ_FAILFAST_DEV | |
130 | REQ_FAILFAST_TRANSPORT | | |
f4f4e47e FT |
131 | REQ_FAILFAST_DRIVER, |
132 | NULL); | |
4d3fef9e | 133 | if (driver_byte(result) & DRIVER_SENSE) { |
33aa687d JB |
134 | struct scsi_sense_hdr sshdr_tmp; |
135 | if (!sshdr) | |
136 | sshdr = &sshdr_tmp; | |
137 | ||
4ed381ee | 138 | if (scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, |
33aa687d JB |
139 | sshdr) |
140 | && sshdr->sense_key == UNIT_ATTENTION) | |
949bf797 JB |
141 | continue; |
142 | } | |
143 | break; | |
144 | } | |
33aa687d | 145 | return result; |
949bf797 JB |
146 | } |
147 | ||
1da177e4 LT |
148 | static struct { |
149 | enum spi_signal_type value; | |
150 | char *name; | |
151 | } signal_types[] = { | |
152 | { SPI_SIGNAL_UNKNOWN, "unknown" }, | |
153 | { SPI_SIGNAL_SE, "SE" }, | |
154 | { SPI_SIGNAL_LVD, "LVD" }, | |
155 | { SPI_SIGNAL_HVD, "HVD" }, | |
156 | }; | |
157 | ||
158 | static inline const char *spi_signal_to_string(enum spi_signal_type type) | |
159 | { | |
160 | int i; | |
161 | ||
6391a113 | 162 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
1da177e4 LT |
163 | if (type == signal_types[i].value) |
164 | return signal_types[i].name; | |
165 | } | |
166 | return NULL; | |
167 | } | |
168 | static inline enum spi_signal_type spi_signal_to_value(const char *name) | |
169 | { | |
170 | int i, len; | |
171 | ||
6391a113 | 172 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
1da177e4 LT |
173 | len = strlen(signal_types[i].name); |
174 | if (strncmp(name, signal_types[i].name, len) == 0 && | |
175 | (name[len] == '\n' || name[len] == '\0')) | |
176 | return signal_types[i].value; | |
177 | } | |
178 | return SPI_SIGNAL_UNKNOWN; | |
179 | } | |
180 | ||
d0a7e574 | 181 | static int spi_host_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 182 | struct device *cdev) |
1da177e4 LT |
183 | { |
184 | struct Scsi_Host *shost = dev_to_shost(dev); | |
185 | ||
186 | spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
9b161a4d JB |
191 | static int spi_host_configure(struct transport_container *tc, |
192 | struct device *dev, | |
ee959b00 | 193 | struct device *cdev); |
9b161a4d | 194 | |
1da177e4 LT |
195 | static DECLARE_TRANSPORT_CLASS(spi_host_class, |
196 | "spi_host", | |
197 | spi_host_setup, | |
198 | NULL, | |
9b161a4d | 199 | spi_host_configure); |
1da177e4 LT |
200 | |
201 | static int spi_host_match(struct attribute_container *cont, | |
202 | struct device *dev) | |
203 | { | |
204 | struct Scsi_Host *shost; | |
1da177e4 LT |
205 | |
206 | if (!scsi_is_host_device(dev)) | |
207 | return 0; | |
208 | ||
209 | shost = dev_to_shost(dev); | |
210 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
211 | != &spi_host_class.class) | |
212 | return 0; | |
213 | ||
9b161a4d | 214 | return &shost->transportt->host_attrs.ac == cont; |
1da177e4 LT |
215 | } |
216 | ||
9b161a4d JB |
217 | static int spi_target_configure(struct transport_container *tc, |
218 | struct device *dev, | |
ee959b00 | 219 | struct device *cdev); |
9b161a4d | 220 | |
d0a7e574 JB |
221 | static int spi_device_configure(struct transport_container *tc, |
222 | struct device *dev, | |
ee959b00 | 223 | struct device *cdev) |
1da177e4 LT |
224 | { |
225 | struct scsi_device *sdev = to_scsi_device(dev); | |
226 | struct scsi_target *starget = sdev->sdev_target; | |
a9e0edb6 JB |
227 | unsigned bflags = scsi_get_device_flags_keyed(sdev, &sdev->inquiry[8], |
228 | &sdev->inquiry[16], | |
229 | SCSI_DEVINFO_SPI); | |
1da177e4 LT |
230 | |
231 | /* Populate the target capability fields with the values | |
232 | * gleaned from the device inquiry */ | |
233 | ||
234 | spi_support_sync(starget) = scsi_device_sync(sdev); | |
235 | spi_support_wide(starget) = scsi_device_wide(sdev); | |
236 | spi_support_dt(starget) = scsi_device_dt(sdev); | |
237 | spi_support_dt_only(starget) = scsi_device_dt_only(sdev); | |
238 | spi_support_ius(starget) = scsi_device_ius(sdev); | |
a9e0edb6 JB |
239 | if (bflags & SPI_BLIST_NOIUS) { |
240 | dev_info(dev, "Information Units disabled by blacklist\n"); | |
241 | spi_support_ius(starget) = 0; | |
242 | } | |
1da177e4 LT |
243 | spi_support_qas(starget) = scsi_device_qas(sdev); |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
d0a7e574 JB |
248 | static int spi_setup_transport_attrs(struct transport_container *tc, |
249 | struct device *dev, | |
ee959b00 | 250 | struct device *cdev) |
1da177e4 LT |
251 | { |
252 | struct scsi_target *starget = to_scsi_target(dev); | |
253 | ||
254 | spi_period(starget) = -1; /* illegal value */ | |
62a86129 | 255 | spi_min_period(starget) = 0; |
1da177e4 | 256 | spi_offset(starget) = 0; /* async */ |
62a86129 | 257 | spi_max_offset(starget) = 255; |
1da177e4 | 258 | spi_width(starget) = 0; /* narrow */ |
62a86129 | 259 | spi_max_width(starget) = 1; |
1da177e4 | 260 | spi_iu(starget) = 0; /* no IU */ |
ea443190 | 261 | spi_max_iu(starget) = 1; |
1da177e4 LT |
262 | spi_dt(starget) = 0; /* ST */ |
263 | spi_qas(starget) = 0; | |
ea443190 | 264 | spi_max_qas(starget) = 1; |
1da177e4 LT |
265 | spi_wr_flow(starget) = 0; |
266 | spi_rd_strm(starget) = 0; | |
267 | spi_rti(starget) = 0; | |
268 | spi_pcomp_en(starget) = 0; | |
d872ebe4 | 269 | spi_hold_mcs(starget) = 0; |
1da177e4 | 270 | spi_dv_pending(starget) = 0; |
dfdc58ba | 271 | spi_dv_in_progress(starget) = 0; |
1da177e4 | 272 | spi_initial_dv(starget) = 0; |
d158d261 | 273 | mutex_init(&spi_dv_mutex(starget)); |
1da177e4 LT |
274 | |
275 | return 0; | |
276 | } | |
277 | ||
62a86129 JB |
278 | #define spi_transport_show_simple(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) \ | |
62a86129 | 283 | { \ |
ee959b00 | 284 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
285 | struct spi_transport_attrs *tp; \ |
286 | \ | |
287 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
288 | return snprintf(buf, 20, format_string, tp->field); \ | |
289 | } | |
290 | ||
291 | #define spi_transport_store_simple(field, format_string) \ | |
292 | \ | |
293 | static ssize_t \ | |
ee959b00 TJ |
294 | store_spi_transport_##field(struct device *dev, \ |
295 | struct device_attribute *attr, \ | |
296 | const char *buf, size_t count) \ | |
62a86129 JB |
297 | { \ |
298 | int val; \ | |
ee959b00 | 299 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
300 | struct spi_transport_attrs *tp; \ |
301 | \ | |
302 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
303 | val = simple_strtoul(buf, NULL, 0); \ | |
304 | tp->field = val; \ | |
305 | return count; \ | |
306 | } | |
307 | ||
1da177e4 LT |
308 | #define spi_transport_show_function(field, format_string) \ |
309 | \ | |
310 | static ssize_t \ | |
ee959b00 TJ |
311 | show_spi_transport_##field(struct device *dev, \ |
312 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 313 | { \ |
ee959b00 | 314 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
315 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
316 | struct spi_transport_attrs *tp; \ | |
317 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
318 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
319 | if (i->f->get_##field) \ | |
320 | i->f->get_##field(starget); \ | |
321 | return snprintf(buf, 20, format_string, tp->field); \ | |
322 | } | |
323 | ||
324 | #define spi_transport_store_function(field, format_string) \ | |
325 | static ssize_t \ | |
ee959b00 TJ |
326 | store_spi_transport_##field(struct device *dev, \ |
327 | struct device_attribute *attr, \ | |
328 | const char *buf, size_t count) \ | |
1da177e4 LT |
329 | { \ |
330 | int val; \ | |
ee959b00 | 331 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
332 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
333 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
334 | \ | |
9b161a4d JB |
335 | if (!i->f->set_##field) \ |
336 | return -EINVAL; \ | |
1da177e4 | 337 | val = simple_strtoul(buf, NULL, 0); \ |
9b161a4d | 338 | i->f->set_##field(starget, val); \ |
62a86129 JB |
339 | return count; \ |
340 | } | |
341 | ||
342 | #define spi_transport_store_max(field, format_string) \ | |
343 | static ssize_t \ | |
ee959b00 TJ |
344 | store_spi_transport_##field(struct device *dev, \ |
345 | struct device_attribute *attr, \ | |
346 | const char *buf, size_t count) \ | |
62a86129 JB |
347 | { \ |
348 | int val; \ | |
ee959b00 | 349 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
350 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
351 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
352 | struct spi_transport_attrs *tp \ | |
353 | = (struct spi_transport_attrs *)&starget->starget_data; \ | |
354 | \ | |
9b161a4d JB |
355 | if (i->f->set_##field) \ |
356 | return -EINVAL; \ | |
62a86129 JB |
357 | val = simple_strtoul(buf, NULL, 0); \ |
358 | if (val > tp->max_##field) \ | |
359 | val = tp->max_##field; \ | |
1da177e4 LT |
360 | i->f->set_##field(starget, val); \ |
361 | return count; \ | |
362 | } | |
363 | ||
364 | #define spi_transport_rd_attr(field, format_string) \ | |
365 | spi_transport_show_function(field, format_string) \ | |
366 | spi_transport_store_function(field, format_string) \ | |
ee959b00 TJ |
367 | static DEVICE_ATTR(field, S_IRUGO, \ |
368 | show_spi_transport_##field, \ | |
369 | store_spi_transport_##field); | |
1da177e4 | 370 | |
62a86129 JB |
371 | #define spi_transport_simple_attr(field, format_string) \ |
372 | spi_transport_show_simple(field, format_string) \ | |
373 | spi_transport_store_simple(field, format_string) \ | |
ee959b00 TJ |
374 | static DEVICE_ATTR(field, S_IRUGO, \ |
375 | show_spi_transport_##field, \ | |
376 | store_spi_transport_##field); | |
62a86129 JB |
377 | |
378 | #define spi_transport_max_attr(field, format_string) \ | |
379 | spi_transport_show_function(field, format_string) \ | |
380 | spi_transport_store_max(field, format_string) \ | |
381 | spi_transport_simple_attr(max_##field, format_string) \ | |
ee959b00 TJ |
382 | static DEVICE_ATTR(field, S_IRUGO, \ |
383 | show_spi_transport_##field, \ | |
384 | store_spi_transport_##field); | |
62a86129 | 385 | |
1da177e4 | 386 | /* The Parallel SCSI Tranport Attributes: */ |
62a86129 JB |
387 | spi_transport_max_attr(offset, "%d\n"); |
388 | spi_transport_max_attr(width, "%d\n"); | |
ea443190 | 389 | spi_transport_max_attr(iu, "%d\n"); |
1da177e4 | 390 | spi_transport_rd_attr(dt, "%d\n"); |
ea443190 | 391 | spi_transport_max_attr(qas, "%d\n"); |
1da177e4 LT |
392 | spi_transport_rd_attr(wr_flow, "%d\n"); |
393 | spi_transport_rd_attr(rd_strm, "%d\n"); | |
394 | spi_transport_rd_attr(rti, "%d\n"); | |
395 | spi_transport_rd_attr(pcomp_en, "%d\n"); | |
d872ebe4 | 396 | spi_transport_rd_attr(hold_mcs, "%d\n"); |
1da177e4 | 397 | |
e8bac9e0 JB |
398 | /* we only care about the first child device that's a real SCSI device |
399 | * so we return 1 to terminate the iteration when we find it */ | |
9a881f16 | 400 | static int child_iter(struct device *dev, void *data) |
401 | { | |
e8bac9e0 JB |
402 | if (!scsi_is_sdev_device(dev)) |
403 | return 0; | |
9a881f16 | 404 | |
e8bac9e0 | 405 | spi_dv_device(to_scsi_device(dev)); |
9a881f16 | 406 | return 1; |
407 | } | |
408 | ||
1da177e4 | 409 | static ssize_t |
ee959b00 TJ |
410 | store_spi_revalidate(struct device *dev, struct device_attribute *attr, |
411 | const char *buf, size_t count) | |
1da177e4 | 412 | { |
ee959b00 | 413 | struct scsi_target *starget = transport_class_to_starget(dev); |
1da177e4 | 414 | |
9a881f16 | 415 | device_for_each_child(&starget->dev, NULL, child_iter); |
1da177e4 LT |
416 | return count; |
417 | } | |
ee959b00 | 418 | static DEVICE_ATTR(revalidate, S_IWUSR, NULL, store_spi_revalidate); |
1da177e4 LT |
419 | |
420 | /* Translate the period into ns according to the current spec | |
421 | * for SDTR/PPR messages */ | |
ef72582e | 422 | static int period_to_str(char *buf, int period) |
1da177e4 | 423 | { |
1da177e4 | 424 | int len, picosec; |
1da177e4 | 425 | |
62a86129 | 426 | if (period < 0 || period > 0xff) { |
1da177e4 | 427 | picosec = -1; |
62a86129 JB |
428 | } else if (period <= SPI_STATIC_PPR) { |
429 | picosec = ppr_to_ps[period]; | |
1da177e4 | 430 | } else { |
62a86129 | 431 | picosec = period * 4000; |
1da177e4 LT |
432 | } |
433 | ||
434 | if (picosec == -1) { | |
435 | len = sprintf(buf, "reserved"); | |
436 | } else { | |
437 | len = sprint_frac(buf, picosec, 1000); | |
438 | } | |
439 | ||
ef72582e MW |
440 | return len; |
441 | } | |
442 | ||
443 | static ssize_t | |
ea697e45 | 444 | show_spi_transport_period_helper(char *buf, int period) |
ef72582e MW |
445 | { |
446 | int len = period_to_str(buf, period); | |
1da177e4 LT |
447 | buf[len++] = '\n'; |
448 | buf[len] = '\0'; | |
449 | return len; | |
450 | } | |
451 | ||
452 | static ssize_t | |
ee959b00 | 453 | store_spi_transport_period_helper(struct device *dev, const char *buf, |
62a86129 | 454 | size_t count, int *periodp) |
1da177e4 | 455 | { |
1da177e4 LT |
456 | int j, picosec, period = -1; |
457 | char *endp; | |
458 | ||
459 | picosec = simple_strtoul(buf, &endp, 10) * 1000; | |
460 | if (*endp == '.') { | |
461 | int mult = 100; | |
462 | do { | |
463 | endp++; | |
464 | if (!isdigit(*endp)) | |
465 | break; | |
466 | picosec += (*endp - '0') * mult; | |
467 | mult /= 10; | |
468 | } while (mult > 0); | |
469 | } | |
470 | ||
471 | for (j = 0; j <= SPI_STATIC_PPR; j++) { | |
472 | if (ppr_to_ps[j] < picosec) | |
473 | continue; | |
474 | period = j; | |
475 | break; | |
476 | } | |
477 | ||
478 | if (period == -1) | |
479 | period = picosec / 4000; | |
480 | ||
481 | if (period > 0xff) | |
482 | period = 0xff; | |
483 | ||
62a86129 | 484 | *periodp = period; |
1da177e4 LT |
485 | |
486 | return count; | |
487 | } | |
488 | ||
62a86129 | 489 | static ssize_t |
ee959b00 TJ |
490 | show_spi_transport_period(struct device *dev, |
491 | struct device_attribute *attr, char *buf) | |
62a86129 | 492 | { |
ee959b00 | 493 | struct scsi_target *starget = transport_class_to_starget(dev); |
62a86129 JB |
494 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
495 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
496 | struct spi_transport_attrs *tp = | |
497 | (struct spi_transport_attrs *)&starget->starget_data; | |
498 | ||
499 | if (i->f->get_period) | |
500 | i->f->get_period(starget); | |
501 | ||
ea697e45 | 502 | return show_spi_transport_period_helper(buf, tp->period); |
62a86129 JB |
503 | } |
504 | ||
505 | static ssize_t | |
ee959b00 TJ |
506 | store_spi_transport_period(struct device *cdev, struct device_attribute *attr, |
507 | const char *buf, size_t count) | |
62a86129 JB |
508 | { |
509 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
510 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
511 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
512 | struct spi_transport_attrs *tp = | |
513 | (struct spi_transport_attrs *)&starget->starget_data; | |
514 | int period, retval; | |
515 | ||
9b161a4d JB |
516 | if (!i->f->set_period) |
517 | return -EINVAL; | |
518 | ||
62a86129 JB |
519 | retval = store_spi_transport_period_helper(cdev, buf, count, &period); |
520 | ||
521 | if (period < tp->min_period) | |
522 | period = tp->min_period; | |
523 | ||
524 | i->f->set_period(starget, period); | |
525 | ||
526 | return retval; | |
527 | } | |
528 | ||
ee959b00 TJ |
529 | static DEVICE_ATTR(period, S_IRUGO, |
530 | show_spi_transport_period, | |
531 | store_spi_transport_period); | |
1da177e4 | 532 | |
62a86129 | 533 | static ssize_t |
ee959b00 TJ |
534 | show_spi_transport_min_period(struct device *cdev, |
535 | struct device_attribute *attr, char *buf) | |
62a86129 JB |
536 | { |
537 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
9b161a4d JB |
538 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
539 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
62a86129 JB |
540 | struct spi_transport_attrs *tp = |
541 | (struct spi_transport_attrs *)&starget->starget_data; | |
542 | ||
9b161a4d JB |
543 | if (!i->f->set_period) |
544 | return -EINVAL; | |
545 | ||
ea697e45 | 546 | return show_spi_transport_period_helper(buf, tp->min_period); |
62a86129 JB |
547 | } |
548 | ||
549 | static ssize_t | |
ee959b00 TJ |
550 | store_spi_transport_min_period(struct device *cdev, |
551 | struct device_attribute *attr, | |
552 | const char *buf, size_t count) | |
62a86129 JB |
553 | { |
554 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
555 | struct spi_transport_attrs *tp = | |
556 | (struct spi_transport_attrs *)&starget->starget_data; | |
557 | ||
558 | return store_spi_transport_period_helper(cdev, buf, count, | |
559 | &tp->min_period); | |
560 | } | |
561 | ||
562 | ||
ee959b00 TJ |
563 | static DEVICE_ATTR(min_period, S_IRUGO, |
564 | show_spi_transport_min_period, | |
565 | store_spi_transport_min_period); | |
62a86129 JB |
566 | |
567 | ||
ee959b00 TJ |
568 | static ssize_t show_spi_host_signalling(struct device *cdev, |
569 | struct device_attribute *attr, | |
570 | char *buf) | |
1da177e4 LT |
571 | { |
572 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
573 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
574 | ||
575 | if (i->f->get_signalling) | |
576 | i->f->get_signalling(shost); | |
577 | ||
578 | return sprintf(buf, "%s\n", spi_signal_to_string(spi_signalling(shost))); | |
579 | } | |
ee959b00 TJ |
580 | static ssize_t store_spi_host_signalling(struct device *dev, |
581 | struct device_attribute *attr, | |
1da177e4 LT |
582 | const char *buf, size_t count) |
583 | { | |
ee959b00 | 584 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
585 | struct spi_internal *i = to_spi_internal(shost->transportt); |
586 | enum spi_signal_type type = spi_signal_to_value(buf); | |
587 | ||
9b161a4d JB |
588 | if (!i->f->set_signalling) |
589 | return -EINVAL; | |
590 | ||
1da177e4 LT |
591 | if (type != SPI_SIGNAL_UNKNOWN) |
592 | i->f->set_signalling(shost, type); | |
593 | ||
594 | return count; | |
595 | } | |
ee959b00 TJ |
596 | static DEVICE_ATTR(signalling, S_IRUGO, |
597 | show_spi_host_signalling, | |
598 | store_spi_host_signalling); | |
1da177e4 LT |
599 | |
600 | #define DV_SET(x, y) \ | |
601 | if(i->f->set_##x) \ | |
602 | i->f->set_##x(sdev->sdev_target, y) | |
603 | ||
1da177e4 LT |
604 | enum spi_compare_returns { |
605 | SPI_COMPARE_SUCCESS, | |
606 | SPI_COMPARE_FAILURE, | |
607 | SPI_COMPARE_SKIP_TEST, | |
608 | }; | |
609 | ||
610 | ||
611 | /* This is for read/write Domain Validation: If the device supports | |
612 | * an echo buffer, we do read/write tests to it */ | |
613 | static enum spi_compare_returns | |
33aa687d | 614 | spi_dv_device_echo_buffer(struct scsi_device *sdev, u8 *buffer, |
1da177e4 LT |
615 | u8 *ptr, const int retries) |
616 | { | |
1da177e4 | 617 | int len = ptr - buffer; |
33aa687d | 618 | int j, k, r, result; |
1da177e4 | 619 | unsigned int pattern = 0x0000ffff; |
33aa687d | 620 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
621 | |
622 | const char spi_write_buffer[] = { | |
623 | WRITE_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 | |
624 | }; | |
625 | const char spi_read_buffer[] = { | |
626 | READ_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 | |
627 | }; | |
628 | ||
629 | /* set up the pattern buffer. Doesn't matter if we spill | |
630 | * slightly beyond since that's where the read buffer is */ | |
631 | for (j = 0; j < len; ) { | |
632 | ||
633 | /* fill the buffer with counting (test a) */ | |
634 | for ( ; j < min(len, 32); j++) | |
635 | buffer[j] = j; | |
636 | k = j; | |
637 | /* fill the buffer with alternating words of 0x0 and | |
638 | * 0xffff (test b) */ | |
639 | for ( ; j < min(len, k + 32); j += 2) { | |
640 | u16 *word = (u16 *)&buffer[j]; | |
641 | ||
642 | *word = (j & 0x02) ? 0x0000 : 0xffff; | |
643 | } | |
644 | k = j; | |
645 | /* fill with crosstalk (alternating 0x5555 0xaaa) | |
646 | * (test c) */ | |
647 | for ( ; j < min(len, k + 32); j += 2) { | |
648 | u16 *word = (u16 *)&buffer[j]; | |
649 | ||
650 | *word = (j & 0x02) ? 0x5555 : 0xaaaa; | |
651 | } | |
652 | k = j; | |
653 | /* fill with shifting bits (test d) */ | |
654 | for ( ; j < min(len, k + 32); j += 4) { | |
655 | u32 *word = (unsigned int *)&buffer[j]; | |
656 | u32 roll = (pattern & 0x80000000) ? 1 : 0; | |
657 | ||
658 | *word = pattern; | |
659 | pattern = (pattern << 1) | roll; | |
660 | } | |
661 | /* don't bother with random data (test e) */ | |
662 | } | |
663 | ||
664 | for (r = 0; r < retries; r++) { | |
33aa687d JB |
665 | result = spi_execute(sdev, spi_write_buffer, DMA_TO_DEVICE, |
666 | buffer, len, &sshdr); | |
667 | if(result || !scsi_device_online(sdev)) { | |
1da177e4 LT |
668 | |
669 | scsi_device_set_state(sdev, SDEV_QUIESCE); | |
33aa687d | 670 | if (scsi_sense_valid(&sshdr) |
1da177e4 LT |
671 | && sshdr.sense_key == ILLEGAL_REQUEST |
672 | /* INVALID FIELD IN CDB */ | |
673 | && sshdr.asc == 0x24 && sshdr.ascq == 0x00) | |
674 | /* This would mean that the drive lied | |
675 | * to us about supporting an echo | |
676 | * buffer (unfortunately some Western | |
677 | * Digital drives do precisely this) | |
678 | */ | |
679 | return SPI_COMPARE_SKIP_TEST; | |
680 | ||
681 | ||
9ccfc756 | 682 | sdev_printk(KERN_ERR, sdev, "Write Buffer failure %x\n", result); |
1da177e4 LT |
683 | return SPI_COMPARE_FAILURE; |
684 | } | |
685 | ||
686 | memset(ptr, 0, len); | |
33aa687d JB |
687 | spi_execute(sdev, spi_read_buffer, DMA_FROM_DEVICE, |
688 | ptr, len, NULL); | |
1da177e4 LT |
689 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
690 | ||
691 | if (memcmp(buffer, ptr, len) != 0) | |
692 | return SPI_COMPARE_FAILURE; | |
693 | } | |
694 | return SPI_COMPARE_SUCCESS; | |
695 | } | |
696 | ||
697 | /* This is for the simplest form of Domain Validation: a read test | |
698 | * on the inquiry data from the device */ | |
699 | static enum spi_compare_returns | |
33aa687d | 700 | spi_dv_device_compare_inquiry(struct scsi_device *sdev, u8 *buffer, |
1da177e4 LT |
701 | u8 *ptr, const int retries) |
702 | { | |
33aa687d JB |
703 | int r, result; |
704 | const int len = sdev->inquiry_len; | |
1da177e4 LT |
705 | const char spi_inquiry[] = { |
706 | INQUIRY, 0, 0, 0, len, 0 | |
707 | }; | |
708 | ||
709 | for (r = 0; r < retries; r++) { | |
1da177e4 LT |
710 | memset(ptr, 0, len); |
711 | ||
33aa687d JB |
712 | result = spi_execute(sdev, spi_inquiry, DMA_FROM_DEVICE, |
713 | ptr, len, NULL); | |
1da177e4 | 714 | |
33aa687d | 715 | if(result || !scsi_device_online(sdev)) { |
1da177e4 LT |
716 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
717 | return SPI_COMPARE_FAILURE; | |
718 | } | |
719 | ||
720 | /* If we don't have the inquiry data already, the | |
721 | * first read gets it */ | |
722 | if (ptr == buffer) { | |
723 | ptr += len; | |
724 | --r; | |
725 | continue; | |
726 | } | |
727 | ||
728 | if (memcmp(buffer, ptr, len) != 0) | |
729 | /* failure */ | |
730 | return SPI_COMPARE_FAILURE; | |
731 | } | |
732 | return SPI_COMPARE_SUCCESS; | |
733 | } | |
734 | ||
735 | static enum spi_compare_returns | |
33aa687d | 736 | spi_dv_retrain(struct scsi_device *sdev, u8 *buffer, u8 *ptr, |
1da177e4 | 737 | enum spi_compare_returns |
33aa687d | 738 | (*compare_fn)(struct scsi_device *, u8 *, u8 *, int)) |
1da177e4 | 739 | { |
33aa687d | 740 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
9a8bc9b8 | 741 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 LT |
742 | int period = 0, prevperiod = 0; |
743 | enum spi_compare_returns retval; | |
744 | ||
745 | ||
746 | for (;;) { | |
747 | int newperiod; | |
33aa687d | 748 | retval = compare_fn(sdev, buffer, ptr, DV_LOOPS); |
1da177e4 LT |
749 | |
750 | if (retval == SPI_COMPARE_SUCCESS | |
751 | || retval == SPI_COMPARE_SKIP_TEST) | |
752 | break; | |
753 | ||
754 | /* OK, retrain, fallback */ | |
9a8bc9b8 JB |
755 | if (i->f->get_iu) |
756 | i->f->get_iu(starget); | |
757 | if (i->f->get_qas) | |
758 | i->f->get_qas(starget); | |
1da177e4 LT |
759 | if (i->f->get_period) |
760 | i->f->get_period(sdev->sdev_target); | |
9a8bc9b8 JB |
761 | |
762 | /* Here's the fallback sequence; first try turning off | |
763 | * IU, then QAS (if we can control them), then finally | |
764 | * fall down the periods */ | |
765 | if (i->f->set_iu && spi_iu(starget)) { | |
9ccfc756 | 766 | starget_printk(KERN_ERR, starget, "Domain Validation Disabing Information Units\n"); |
9a8bc9b8 JB |
767 | DV_SET(iu, 0); |
768 | } else if (i->f->set_qas && spi_qas(starget)) { | |
9ccfc756 | 769 | starget_printk(KERN_ERR, starget, "Domain Validation Disabing Quick Arbitration and Selection\n"); |
9a8bc9b8 JB |
770 | DV_SET(qas, 0); |
771 | } else { | |
772 | newperiod = spi_period(starget); | |
773 | period = newperiod > period ? newperiod : period; | |
774 | if (period < 0x0d) | |
775 | period++; | |
776 | else | |
777 | period += period >> 1; | |
778 | ||
779 | if (unlikely(period > 0xff || period == prevperiod)) { | |
780 | /* Total failure; set to async and return */ | |
9ccfc756 | 781 | starget_printk(KERN_ERR, starget, "Domain Validation Failure, dropping back to Asynchronous\n"); |
9a8bc9b8 JB |
782 | DV_SET(offset, 0); |
783 | return SPI_COMPARE_FAILURE; | |
784 | } | |
9ccfc756 | 785 | starget_printk(KERN_ERR, starget, "Domain Validation detected failure, dropping back\n"); |
9a8bc9b8 JB |
786 | DV_SET(period, period); |
787 | prevperiod = period; | |
1da177e4 | 788 | } |
1da177e4 LT |
789 | } |
790 | return retval; | |
791 | } | |
792 | ||
793 | static int | |
33aa687d | 794 | spi_dv_device_get_echo_buffer(struct scsi_device *sdev, u8 *buffer) |
1da177e4 | 795 | { |
33aa687d | 796 | int l, result; |
1da177e4 LT |
797 | |
798 | /* first off do a test unit ready. This can error out | |
799 | * because of reservations or some other reason. If it | |
800 | * fails, the device won't let us write to the echo buffer | |
801 | * so just return failure */ | |
802 | ||
803 | const char spi_test_unit_ready[] = { | |
804 | TEST_UNIT_READY, 0, 0, 0, 0, 0 | |
805 | }; | |
806 | ||
807 | const char spi_read_buffer_descriptor[] = { | |
808 | READ_BUFFER, 0x0b, 0, 0, 0, 0, 0, 0, 4, 0 | |
809 | }; | |
810 | ||
811 | ||
1da177e4 LT |
812 | /* We send a set of three TURs to clear any outstanding |
813 | * unit attention conditions if they exist (Otherwise the | |
814 | * buffer tests won't be happy). If the TUR still fails | |
815 | * (reservation conflict, device not ready, etc) just | |
816 | * skip the write tests */ | |
817 | for (l = 0; ; l++) { | |
33aa687d JB |
818 | result = spi_execute(sdev, spi_test_unit_ready, DMA_NONE, |
819 | NULL, 0, NULL); | |
1da177e4 | 820 | |
33aa687d | 821 | if(result) { |
1da177e4 LT |
822 | if(l >= 3) |
823 | return 0; | |
824 | } else { | |
825 | /* TUR succeeded */ | |
826 | break; | |
827 | } | |
828 | } | |
829 | ||
33aa687d JB |
830 | result = spi_execute(sdev, spi_read_buffer_descriptor, |
831 | DMA_FROM_DEVICE, buffer, 4, NULL); | |
1da177e4 | 832 | |
33aa687d | 833 | if (result) |
1da177e4 LT |
834 | /* Device has no echo buffer */ |
835 | return 0; | |
836 | ||
837 | return buffer[3] + ((buffer[2] & 0x1f) << 8); | |
838 | } | |
839 | ||
840 | static void | |
33aa687d | 841 | spi_dv_device_internal(struct scsi_device *sdev, u8 *buffer) |
1da177e4 | 842 | { |
33aa687d | 843 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
62a86129 | 844 | struct scsi_target *starget = sdev->sdev_target; |
60eef257 | 845 | struct Scsi_Host *shost = sdev->host; |
1da177e4 | 846 | int len = sdev->inquiry_len; |
2302827c JB |
847 | int min_period = spi_min_period(starget); |
848 | int max_width = spi_max_width(starget); | |
1da177e4 LT |
849 | /* first set us up for narrow async */ |
850 | DV_SET(offset, 0); | |
851 | DV_SET(width, 0); | |
2302827c | 852 | |
33aa687d | 853 | if (spi_dv_device_compare_inquiry(sdev, buffer, buffer, DV_LOOPS) |
1da177e4 | 854 | != SPI_COMPARE_SUCCESS) { |
9ccfc756 | 855 | starget_printk(KERN_ERR, starget, "Domain Validation Initial Inquiry Failed\n"); |
1da177e4 LT |
856 | /* FIXME: should probably offline the device here? */ |
857 | return; | |
858 | } | |
859 | ||
9872b81c | 860 | if (!spi_support_wide(starget)) { |
2302827c JB |
861 | spi_max_width(starget) = 0; |
862 | max_width = 0; | |
863 | } | |
864 | ||
1da177e4 | 865 | /* test width */ |
2302827c | 866 | if (i->f->set_width && max_width) { |
9a8bc9b8 | 867 | i->f->set_width(starget, 1); |
62a86129 | 868 | |
33aa687d | 869 | if (spi_dv_device_compare_inquiry(sdev, buffer, |
1da177e4 LT |
870 | buffer + len, |
871 | DV_LOOPS) | |
872 | != SPI_COMPARE_SUCCESS) { | |
9ccfc756 | 873 | starget_printk(KERN_ERR, starget, "Wide Transfers Fail\n"); |
9a8bc9b8 | 874 | i->f->set_width(starget, 0); |
2302827c JB |
875 | /* Make sure we don't force wide back on by asking |
876 | * for a transfer period that requires it */ | |
877 | max_width = 0; | |
878 | if (min_period < 10) | |
879 | min_period = 10; | |
1da177e4 LT |
880 | } |
881 | } | |
882 | ||
883 | if (!i->f->set_period) | |
884 | return; | |
885 | ||
886 | /* device can't handle synchronous */ | |
9872b81c | 887 | if (!spi_support_sync(starget) && !spi_support_dt(starget)) |
1da177e4 LT |
888 | return; |
889 | ||
349cd7cf JB |
890 | /* len == -1 is the signal that we need to ascertain the |
891 | * presence of an echo buffer before trying to use it. len == | |
892 | * 0 means we don't have an echo buffer */ | |
893 | len = -1; | |
1da177e4 LT |
894 | |
895 | retry: | |
896 | ||
897 | /* now set up to the maximum */ | |
62a86129 | 898 | DV_SET(offset, spi_max_offset(starget)); |
2302827c JB |
899 | DV_SET(period, min_period); |
900 | ||
9a8bc9b8 JB |
901 | /* try QAS requests; this should be harmless to set if the |
902 | * target supports it */ | |
9872b81c | 903 | if (spi_support_qas(starget) && spi_max_qas(starget)) { |
eb1dd68b | 904 | DV_SET(qas, 1); |
dfdc58ba JB |
905 | } else { |
906 | DV_SET(qas, 0); | |
907 | } | |
908 | ||
9872b81c JB |
909 | if (spi_support_ius(starget) && spi_max_iu(starget) && |
910 | min_period < 9) { | |
dfdc58ba | 911 | /* This u320 (or u640). Set IU transfers */ |
eb1dd68b | 912 | DV_SET(iu, 1); |
dfdc58ba | 913 | /* Then set the optional parameters */ |
9a8bc9b8 JB |
914 | DV_SET(rd_strm, 1); |
915 | DV_SET(wr_flow, 1); | |
916 | DV_SET(rti, 1); | |
2302827c | 917 | if (min_period == 8) |
9a8bc9b8 | 918 | DV_SET(pcomp_en, 1); |
dfdc58ba JB |
919 | } else { |
920 | DV_SET(iu, 0); | |
9a8bc9b8 | 921 | } |
dfdc58ba | 922 | |
60eef257 JB |
923 | /* now that we've done all this, actually check the bus |
924 | * signal type (if known). Some devices are stupid on | |
925 | * a SE bus and still claim they can try LVD only settings */ | |
926 | if (i->f->get_signalling) | |
927 | i->f->get_signalling(shost); | |
928 | if (spi_signalling(shost) == SPI_SIGNAL_SE || | |
dfdc58ba | 929 | spi_signalling(shost) == SPI_SIGNAL_HVD || |
9872b81c | 930 | !spi_support_dt(starget)) { |
60eef257 | 931 | DV_SET(dt, 0); |
dfdc58ba JB |
932 | } else { |
933 | DV_SET(dt, 1); | |
934 | } | |
2302827c JB |
935 | /* set width last because it will pull all the other |
936 | * parameters down to required values */ | |
937 | DV_SET(width, max_width); | |
938 | ||
349cd7cf JB |
939 | /* Do the read only INQUIRY tests */ |
940 | spi_dv_retrain(sdev, buffer, buffer + sdev->inquiry_len, | |
941 | spi_dv_device_compare_inquiry); | |
942 | /* See if we actually managed to negotiate and sustain DT */ | |
943 | if (i->f->get_dt) | |
944 | i->f->get_dt(starget); | |
945 | ||
946 | /* see if the device has an echo buffer. If it does we can do | |
947 | * the SPI pattern write tests. Because of some broken | |
948 | * devices, we *only* try this on a device that has actually | |
949 | * negotiated DT */ | |
950 | ||
951 | if (len == -1 && spi_dt(starget)) | |
952 | len = spi_dv_device_get_echo_buffer(sdev, buffer); | |
1da177e4 | 953 | |
349cd7cf | 954 | if (len <= 0) { |
9ccfc756 | 955 | starget_printk(KERN_INFO, starget, "Domain Validation skipping write tests\n"); |
1da177e4 LT |
956 | return; |
957 | } | |
958 | ||
959 | if (len > SPI_MAX_ECHO_BUFFER_SIZE) { | |
9ccfc756 | 960 | starget_printk(KERN_WARNING, starget, "Echo buffer size %d is too big, trimming to %d\n", len, SPI_MAX_ECHO_BUFFER_SIZE); |
1da177e4 LT |
961 | len = SPI_MAX_ECHO_BUFFER_SIZE; |
962 | } | |
963 | ||
33aa687d | 964 | if (spi_dv_retrain(sdev, buffer, buffer + len, |
1da177e4 LT |
965 | spi_dv_device_echo_buffer) |
966 | == SPI_COMPARE_SKIP_TEST) { | |
967 | /* OK, the stupid drive can't do a write echo buffer | |
968 | * test after all, fall back to the read tests */ | |
969 | len = 0; | |
970 | goto retry; | |
971 | } | |
972 | } | |
973 | ||
974 | ||
975 | /** spi_dv_device - Do Domain Validation on the device | |
976 | * @sdev: scsi device to validate | |
977 | * | |
978 | * Performs the domain validation on the given device in the | |
979 | * current execution thread. Since DV operations may sleep, | |
980 | * the current thread must have user context. Also no SCSI | |
981 | * related locks that would deadlock I/O issued by the DV may | |
982 | * be held. | |
983 | */ | |
984 | void | |
985 | spi_dv_device(struct scsi_device *sdev) | |
986 | { | |
1da177e4 LT |
987 | struct scsi_target *starget = sdev->sdev_target; |
988 | u8 *buffer; | |
989 | const int len = SPI_MAX_ECHO_BUFFER_SIZE*2; | |
990 | ||
1da177e4 | 991 | if (unlikely(scsi_device_get(sdev))) |
33aa687d | 992 | return; |
1da177e4 | 993 | |
dfdc58ba JB |
994 | if (unlikely(spi_dv_in_progress(starget))) |
995 | return; | |
996 | spi_dv_in_progress(starget) = 1; | |
997 | ||
24669f75 | 998 | buffer = kzalloc(len, GFP_KERNEL); |
1da177e4 LT |
999 | |
1000 | if (unlikely(!buffer)) | |
1001 | goto out_put; | |
1002 | ||
1da177e4 LT |
1003 | /* We need to verify that the actual device will quiesce; the |
1004 | * later target quiesce is just a nice to have */ | |
1005 | if (unlikely(scsi_device_quiesce(sdev))) | |
1006 | goto out_free; | |
1007 | ||
1008 | scsi_target_quiesce(starget); | |
1009 | ||
1010 | spi_dv_pending(starget) = 1; | |
d158d261 | 1011 | mutex_lock(&spi_dv_mutex(starget)); |
1da177e4 | 1012 | |
9ccfc756 | 1013 | starget_printk(KERN_INFO, starget, "Beginning Domain Validation\n"); |
1da177e4 | 1014 | |
33aa687d | 1015 | spi_dv_device_internal(sdev, buffer); |
1da177e4 | 1016 | |
9ccfc756 | 1017 | starget_printk(KERN_INFO, starget, "Ending Domain Validation\n"); |
1da177e4 | 1018 | |
d158d261 | 1019 | mutex_unlock(&spi_dv_mutex(starget)); |
1da177e4 LT |
1020 | spi_dv_pending(starget) = 0; |
1021 | ||
1022 | scsi_target_resume(starget); | |
1023 | ||
1024 | spi_initial_dv(starget) = 1; | |
1025 | ||
1026 | out_free: | |
1027 | kfree(buffer); | |
1028 | out_put: | |
dfdc58ba | 1029 | spi_dv_in_progress(starget) = 0; |
1da177e4 | 1030 | scsi_device_put(sdev); |
1da177e4 LT |
1031 | } |
1032 | EXPORT_SYMBOL(spi_dv_device); | |
1033 | ||
1034 | struct work_queue_wrapper { | |
1035 | struct work_struct work; | |
1036 | struct scsi_device *sdev; | |
1037 | }; | |
1038 | ||
1039 | static void | |
c4028958 | 1040 | spi_dv_device_work_wrapper(struct work_struct *work) |
1da177e4 | 1041 | { |
c4028958 DH |
1042 | struct work_queue_wrapper *wqw = |
1043 | container_of(work, struct work_queue_wrapper, work); | |
1da177e4 LT |
1044 | struct scsi_device *sdev = wqw->sdev; |
1045 | ||
1046 | kfree(wqw); | |
1047 | spi_dv_device(sdev); | |
1048 | spi_dv_pending(sdev->sdev_target) = 0; | |
1049 | scsi_device_put(sdev); | |
1050 | } | |
1051 | ||
1052 | ||
1053 | /** | |
1054 | * spi_schedule_dv_device - schedule domain validation to occur on the device | |
1055 | * @sdev: The device to validate | |
1056 | * | |
1057 | * Identical to spi_dv_device() above, except that the DV will be | |
1058 | * scheduled to occur in a workqueue later. All memory allocations | |
1059 | * are atomic, so may be called from any context including those holding | |
1060 | * SCSI locks. | |
1061 | */ | |
1062 | void | |
1063 | spi_schedule_dv_device(struct scsi_device *sdev) | |
1064 | { | |
1065 | struct work_queue_wrapper *wqw = | |
1066 | kmalloc(sizeof(struct work_queue_wrapper), GFP_ATOMIC); | |
1067 | ||
1068 | if (unlikely(!wqw)) | |
1069 | return; | |
1070 | ||
1071 | if (unlikely(spi_dv_pending(sdev->sdev_target))) { | |
1072 | kfree(wqw); | |
1073 | return; | |
1074 | } | |
1075 | /* Set pending early (dv_device doesn't check it, only sets it) */ | |
1076 | spi_dv_pending(sdev->sdev_target) = 1; | |
1077 | if (unlikely(scsi_device_get(sdev))) { | |
1078 | kfree(wqw); | |
1079 | spi_dv_pending(sdev->sdev_target) = 0; | |
1080 | return; | |
1081 | } | |
1082 | ||
c4028958 | 1083 | INIT_WORK(&wqw->work, spi_dv_device_work_wrapper); |
1da177e4 LT |
1084 | wqw->sdev = sdev; |
1085 | ||
1086 | schedule_work(&wqw->work); | |
1087 | } | |
1088 | EXPORT_SYMBOL(spi_schedule_dv_device); | |
1089 | ||
1090 | /** | |
1091 | * spi_display_xfer_agreement - Print the current target transfer agreement | |
1092 | * @starget: The target for which to display the agreement | |
1093 | * | |
1094 | * Each SPI port is required to maintain a transfer agreement for each | |
1095 | * other port on the bus. This function prints a one-line summary of | |
1096 | * the current agreement; more detailed information is available in sysfs. | |
1097 | */ | |
1098 | void spi_display_xfer_agreement(struct scsi_target *starget) | |
1099 | { | |
1100 | struct spi_transport_attrs *tp; | |
1101 | tp = (struct spi_transport_attrs *)&starget->starget_data; | |
1102 | ||
1103 | if (tp->offset > 0 && tp->period > 0) { | |
1104 | unsigned int picosec, kb100; | |
1105 | char *scsi = "FAST-?"; | |
1106 | char tmp[8]; | |
1107 | ||
1108 | if (tp->period <= SPI_STATIC_PPR) { | |
1109 | picosec = ppr_to_ps[tp->period]; | |
1110 | switch (tp->period) { | |
1111 | case 7: scsi = "FAST-320"; break; | |
1112 | case 8: scsi = "FAST-160"; break; | |
1113 | case 9: scsi = "FAST-80"; break; | |
1114 | case 10: | |
1115 | case 11: scsi = "FAST-40"; break; | |
1116 | case 12: scsi = "FAST-20"; break; | |
1117 | } | |
1118 | } else { | |
1119 | picosec = tp->period * 4000; | |
1120 | if (tp->period < 25) | |
1121 | scsi = "FAST-20"; | |
1122 | else if (tp->period < 50) | |
1123 | scsi = "FAST-10"; | |
1124 | else | |
1125 | scsi = "FAST-5"; | |
1126 | } | |
1127 | ||
1128 | kb100 = (10000000 + picosec / 2) / picosec; | |
1129 | if (tp->width) | |
1130 | kb100 *= 2; | |
1131 | sprint_frac(tmp, picosec, 1000); | |
1132 | ||
1133 | dev_info(&starget->dev, | |
d872ebe4 JB |
1134 | "%s %sSCSI %d.%d MB/s %s%s%s%s%s%s%s%s (%s ns, offset %d)\n", |
1135 | scsi, tp->width ? "WIDE " : "", kb100/10, kb100 % 10, | |
1136 | tp->dt ? "DT" : "ST", | |
1137 | tp->iu ? " IU" : "", | |
1138 | tp->qas ? " QAS" : "", | |
1139 | tp->rd_strm ? " RDSTRM" : "", | |
1140 | tp->rti ? " RTI" : "", | |
1141 | tp->wr_flow ? " WRFLOW" : "", | |
1142 | tp->pcomp_en ? " PCOMP" : "", | |
1143 | tp->hold_mcs ? " HMCS" : "", | |
1144 | tmp, tp->offset); | |
1da177e4 | 1145 | } else { |
493ff4ee | 1146 | dev_info(&starget->dev, "%sasynchronous\n", |
1da177e4 LT |
1147 | tp->width ? "wide " : ""); |
1148 | } | |
1149 | } | |
1150 | EXPORT_SYMBOL(spi_display_xfer_agreement); | |
1151 | ||
6ea3c0b2 MW |
1152 | int spi_populate_width_msg(unsigned char *msg, int width) |
1153 | { | |
1154 | msg[0] = EXTENDED_MESSAGE; | |
1155 | msg[1] = 2; | |
1156 | msg[2] = EXTENDED_WDTR; | |
1157 | msg[3] = width; | |
1158 | return 4; | |
1159 | } | |
38e14f89 | 1160 | EXPORT_SYMBOL_GPL(spi_populate_width_msg); |
6ea3c0b2 MW |
1161 | |
1162 | int spi_populate_sync_msg(unsigned char *msg, int period, int offset) | |
1163 | { | |
1164 | msg[0] = EXTENDED_MESSAGE; | |
1165 | msg[1] = 3; | |
1166 | msg[2] = EXTENDED_SDTR; | |
1167 | msg[3] = period; | |
1168 | msg[4] = offset; | |
1169 | return 5; | |
1170 | } | |
38e14f89 | 1171 | EXPORT_SYMBOL_GPL(spi_populate_sync_msg); |
6ea3c0b2 MW |
1172 | |
1173 | int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, | |
1174 | int width, int options) | |
1175 | { | |
1176 | msg[0] = EXTENDED_MESSAGE; | |
1177 | msg[1] = 6; | |
1178 | msg[2] = EXTENDED_PPR; | |
1179 | msg[3] = period; | |
1180 | msg[4] = 0; | |
1181 | msg[5] = offset; | |
1182 | msg[6] = width; | |
1183 | msg[7] = options; | |
1184 | return 8; | |
1185 | } | |
38e14f89 | 1186 | EXPORT_SYMBOL_GPL(spi_populate_ppr_msg); |
6ea3c0b2 | 1187 | |
410ca5c7 MW |
1188 | #ifdef CONFIG_SCSI_CONSTANTS |
1189 | static const char * const one_byte_msgs[] = { | |
72df0ebf | 1190 | /* 0x00 */ "Task Complete", NULL /* Extended Message */, "Save Pointers", |
410ca5c7 | 1191 | /* 0x03 */ "Restore Pointers", "Disconnect", "Initiator Error", |
72df0ebf | 1192 | /* 0x06 */ "Abort Task Set", "Message Reject", "Nop", "Message Parity Error", |
410ca5c7 | 1193 | /* 0x0a */ "Linked Command Complete", "Linked Command Complete w/flag", |
72df0ebf MW |
1194 | /* 0x0c */ "Target Reset", "Abort Task", "Clear Task Set", |
1195 | /* 0x0f */ "Initiate Recovery", "Release Recovery", | |
1196 | /* 0x11 */ "Terminate Process", "Continue Task", "Target Transfer Disable", | |
1197 | /* 0x14 */ NULL, NULL, "Clear ACA", "LUN Reset" | |
410ca5c7 | 1198 | }; |
410ca5c7 MW |
1199 | |
1200 | static const char * const two_byte_msgs[] = { | |
47972153 | 1201 | /* 0x20 */ "Simple Queue Tag", "Head of Queue Tag", "Ordered Queue Tag", |
72df0ebf | 1202 | /* 0x23 */ "Ignore Wide Residue", "ACA" |
410ca5c7 | 1203 | }; |
410ca5c7 MW |
1204 | |
1205 | static const char * const extended_msgs[] = { | |
1206 | /* 0x00 */ "Modify Data Pointer", "Synchronous Data Transfer Request", | |
ef72582e | 1207 | /* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request", |
fc25307d | 1208 | /* 0x04 */ "Parallel Protocol Request", "Modify Bidirectional Data Pointer" |
410ca5c7 | 1209 | }; |
410ca5c7 | 1210 | |
bdd70f2c | 1211 | static void print_nego(const unsigned char *msg, int per, int off, int width) |
ef72582e MW |
1212 | { |
1213 | if (per) { | |
1214 | char buf[20]; | |
1215 | period_to_str(buf, msg[per]); | |
1216 | printk("period = %s ns ", buf); | |
1217 | } | |
1218 | ||
1219 | if (off) | |
1220 | printk("offset = %d ", msg[off]); | |
1221 | if (width) | |
1222 | printk("width = %d ", 8 << msg[width]); | |
1223 | } | |
410ca5c7 | 1224 | |
fc25307d MW |
1225 | static void print_ptr(const unsigned char *msg, int msb, const char *desc) |
1226 | { | |
1227 | int ptr = (msg[msb] << 24) | (msg[msb+1] << 16) | (msg[msb+2] << 8) | | |
1228 | msg[msb+3]; | |
1229 | printk("%s = %d ", desc, ptr); | |
1230 | } | |
1231 | ||
1abfd370 | 1232 | int spi_print_msg(const unsigned char *msg) |
410ca5c7 | 1233 | { |
72df0ebf | 1234 | int len = 1, i; |
410ca5c7 | 1235 | if (msg[0] == EXTENDED_MESSAGE) { |
fc25307d MW |
1236 | len = 2 + msg[1]; |
1237 | if (len == 2) | |
1238 | len += 256; | |
b32aaffc | 1239 | if (msg[2] < ARRAY_SIZE(extended_msgs)) |
410ca5c7 MW |
1240 | printk ("%s ", extended_msgs[msg[2]]); |
1241 | else | |
1242 | printk ("Extended Message, reserved code (0x%02x) ", | |
1243 | (int) msg[2]); | |
1244 | switch (msg[2]) { | |
1245 | case EXTENDED_MODIFY_DATA_POINTER: | |
fc25307d | 1246 | print_ptr(msg, 3, "pointer"); |
410ca5c7 MW |
1247 | break; |
1248 | case EXTENDED_SDTR: | |
ef72582e | 1249 | print_nego(msg, 3, 4, 0); |
410ca5c7 MW |
1250 | break; |
1251 | case EXTENDED_WDTR: | |
ef72582e MW |
1252 | print_nego(msg, 0, 0, 3); |
1253 | break; | |
1254 | case EXTENDED_PPR: | |
1255 | print_nego(msg, 3, 5, 6); | |
410ca5c7 | 1256 | break; |
fc25307d MW |
1257 | case EXTENDED_MODIFY_BIDI_DATA_PTR: |
1258 | print_ptr(msg, 3, "out"); | |
1259 | print_ptr(msg, 7, "in"); | |
1260 | break; | |
410ca5c7 MW |
1261 | default: |
1262 | for (i = 2; i < len; ++i) | |
1263 | printk("%02x ", msg[i]); | |
1264 | } | |
1265 | /* Identify */ | |
1266 | } else if (msg[0] & 0x80) { | |
1267 | printk("Identify disconnect %sallowed %s %d ", | |
1268 | (msg[0] & 0x40) ? "" : "not ", | |
1269 | (msg[0] & 0x20) ? "target routine" : "lun", | |
1270 | msg[0] & 0x7); | |
410ca5c7 MW |
1271 | /* Normal One byte */ |
1272 | } else if (msg[0] < 0x1f) { | |
72df0ebf | 1273 | if (msg[0] < ARRAY_SIZE(one_byte_msgs) && one_byte_msgs[msg[0]]) |
e24d873d | 1274 | printk("%s ", one_byte_msgs[msg[0]]); |
410ca5c7 MW |
1275 | else |
1276 | printk("reserved (%02x) ", msg[0]); | |
72df0ebf MW |
1277 | } else if (msg[0] == 0x55) { |
1278 | printk("QAS Request "); | |
410ca5c7 MW |
1279 | /* Two byte */ |
1280 | } else if (msg[0] <= 0x2f) { | |
b32aaffc | 1281 | if ((msg[0] - 0x20) < ARRAY_SIZE(two_byte_msgs)) |
410ca5c7 MW |
1282 | printk("%s %02x ", two_byte_msgs[msg[0] - 0x20], |
1283 | msg[1]); | |
1284 | else | |
1285 | printk("reserved two byte (%02x %02x) ", | |
1286 | msg[0], msg[1]); | |
1287 | len = 2; | |
1288 | } else | |
e24d873d | 1289 | printk("reserved "); |
410ca5c7 MW |
1290 | return len; |
1291 | } | |
1abfd370 | 1292 | EXPORT_SYMBOL(spi_print_msg); |
410ca5c7 MW |
1293 | |
1294 | #else /* ifndef CONFIG_SCSI_CONSTANTS */ | |
1295 | ||
1abfd370 | 1296 | int spi_print_msg(const unsigned char *msg) |
410ca5c7 | 1297 | { |
72df0ebf | 1298 | int len = 1, i; |
410ca5c7 MW |
1299 | |
1300 | if (msg[0] == EXTENDED_MESSAGE) { | |
fc25307d MW |
1301 | len = 2 + msg[1]; |
1302 | if (len == 2) | |
1303 | len += 256; | |
410ca5c7 MW |
1304 | for (i = 0; i < len; ++i) |
1305 | printk("%02x ", msg[i]); | |
1306 | /* Identify */ | |
1307 | } else if (msg[0] & 0x80) { | |
1308 | printk("%02x ", msg[0]); | |
410ca5c7 | 1309 | /* Normal One byte */ |
597705aa | 1310 | } else if ((msg[0] < 0x1f) || (msg[0] == 0x55)) { |
410ca5c7 | 1311 | printk("%02x ", msg[0]); |
410ca5c7 MW |
1312 | /* Two byte */ |
1313 | } else if (msg[0] <= 0x2f) { | |
1314 | printk("%02x %02x", msg[0], msg[1]); | |
1315 | len = 2; | |
1316 | } else | |
1317 | printk("%02x ", msg[0]); | |
1318 | return len; | |
1319 | } | |
1abfd370 | 1320 | EXPORT_SYMBOL(spi_print_msg); |
410ca5c7 MW |
1321 | #endif /* ! CONFIG_SCSI_CONSTANTS */ |
1322 | ||
1da177e4 LT |
1323 | static int spi_device_match(struct attribute_container *cont, |
1324 | struct device *dev) | |
1325 | { | |
1326 | struct scsi_device *sdev; | |
1327 | struct Scsi_Host *shost; | |
10c1b889 | 1328 | struct spi_internal *i; |
1da177e4 LT |
1329 | |
1330 | if (!scsi_is_sdev_device(dev)) | |
1331 | return 0; | |
1332 | ||
1333 | sdev = to_scsi_device(dev); | |
1334 | shost = sdev->host; | |
1335 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1336 | != &spi_host_class.class) | |
1337 | return 0; | |
1338 | /* Note: this class has no device attributes, so it has | |
1339 | * no per-HBA allocation and thus we don't need to distinguish | |
1340 | * the attribute containers for the device */ | |
10c1b889 JB |
1341 | i = to_spi_internal(shost->transportt); |
1342 | if (i->f->deny_binding && i->f->deny_binding(sdev->sdev_target)) | |
1343 | return 0; | |
1da177e4 LT |
1344 | return 1; |
1345 | } | |
1346 | ||
1347 | static int spi_target_match(struct attribute_container *cont, | |
1348 | struct device *dev) | |
1349 | { | |
1350 | struct Scsi_Host *shost; | |
10c1b889 | 1351 | struct scsi_target *starget; |
1da177e4 LT |
1352 | struct spi_internal *i; |
1353 | ||
1354 | if (!scsi_is_target_device(dev)) | |
1355 | return 0; | |
1356 | ||
1357 | shost = dev_to_shost(dev->parent); | |
1358 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1359 | != &spi_host_class.class) | |
1360 | return 0; | |
1361 | ||
1362 | i = to_spi_internal(shost->transportt); | |
10c1b889 JB |
1363 | starget = to_scsi_target(dev); |
1364 | ||
1365 | if (i->f->deny_binding && i->f->deny_binding(starget)) | |
1366 | return 0; | |
1367 | ||
1da177e4 LT |
1368 | return &i->t.target_attrs.ac == cont; |
1369 | } | |
1370 | ||
1371 | static DECLARE_TRANSPORT_CLASS(spi_transport_class, | |
1372 | "spi_transport", | |
1373 | spi_setup_transport_attrs, | |
1374 | NULL, | |
9b161a4d | 1375 | spi_target_configure); |
1da177e4 LT |
1376 | |
1377 | static DECLARE_ANON_TRANSPORT_CLASS(spi_device_class, | |
1378 | spi_device_match, | |
1379 | spi_device_configure); | |
1380 | ||
9b161a4d | 1381 | static struct attribute *host_attributes[] = { |
ee959b00 | 1382 | &dev_attr_signalling.attr, |
9b161a4d JB |
1383 | NULL |
1384 | }; | |
1385 | ||
1386 | static struct attribute_group host_attribute_group = { | |
1387 | .attrs = host_attributes, | |
1388 | }; | |
1389 | ||
1390 | static int spi_host_configure(struct transport_container *tc, | |
1391 | struct device *dev, | |
ee959b00 | 1392 | struct device *cdev) |
9b161a4d JB |
1393 | { |
1394 | struct kobject *kobj = &cdev->kobj; | |
1395 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1396 | struct spi_internal *si = to_spi_internal(shost->transportt); | |
ee959b00 | 1397 | struct attribute *attr = &dev_attr_signalling.attr; |
9b161a4d JB |
1398 | int rc = 0; |
1399 | ||
1400 | if (si->f->set_signalling) | |
1401 | rc = sysfs_chmod_file(kobj, attr, attr->mode | S_IWUSR); | |
1402 | ||
1403 | return rc; | |
1404 | } | |
1405 | ||
1406 | /* returns true if we should be showing the variable. Also | |
1407 | * overloads the return by setting 1<<1 if the attribute should | |
1408 | * be writeable */ | |
1409 | #define TARGET_ATTRIBUTE_HELPER(name) \ | |
352f6bb4 JB |
1410 | (si->f->show_##name ? S_IRUGO : 0) | \ |
1411 | (si->f->set_##name ? S_IWUSR : 0) | |
9b161a4d | 1412 | |
352f6bb4 JB |
1413 | static mode_t target_attribute_is_visible(struct kobject *kobj, |
1414 | struct attribute *attr, int i) | |
9b161a4d | 1415 | { |
ee959b00 | 1416 | struct device *cdev = container_of(kobj, struct device, kobj); |
9b161a4d JB |
1417 | struct scsi_target *starget = transport_class_to_starget(cdev); |
1418 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1419 | struct spi_internal *si = to_spi_internal(shost->transportt); | |
1420 | ||
ee959b00 | 1421 | if (attr == &dev_attr_period.attr && |
9b161a4d JB |
1422 | spi_support_sync(starget)) |
1423 | return TARGET_ATTRIBUTE_HELPER(period); | |
ee959b00 | 1424 | else if (attr == &dev_attr_min_period.attr && |
9b161a4d JB |
1425 | spi_support_sync(starget)) |
1426 | return TARGET_ATTRIBUTE_HELPER(period); | |
ee959b00 | 1427 | else if (attr == &dev_attr_offset.attr && |
9b161a4d JB |
1428 | spi_support_sync(starget)) |
1429 | return TARGET_ATTRIBUTE_HELPER(offset); | |
ee959b00 | 1430 | else if (attr == &dev_attr_max_offset.attr && |
9b161a4d JB |
1431 | spi_support_sync(starget)) |
1432 | return TARGET_ATTRIBUTE_HELPER(offset); | |
ee959b00 | 1433 | else if (attr == &dev_attr_width.attr && |
9b161a4d JB |
1434 | spi_support_wide(starget)) |
1435 | return TARGET_ATTRIBUTE_HELPER(width); | |
ee959b00 | 1436 | else if (attr == &dev_attr_max_width.attr && |
9b161a4d JB |
1437 | spi_support_wide(starget)) |
1438 | return TARGET_ATTRIBUTE_HELPER(width); | |
ee959b00 | 1439 | else if (attr == &dev_attr_iu.attr && |
9b161a4d JB |
1440 | spi_support_ius(starget)) |
1441 | return TARGET_ATTRIBUTE_HELPER(iu); | |
ea443190 JB |
1442 | else if (attr == &dev_attr_max_iu.attr && |
1443 | spi_support_ius(starget)) | |
1444 | return TARGET_ATTRIBUTE_HELPER(iu); | |
ee959b00 | 1445 | else if (attr == &dev_attr_dt.attr && |
9b161a4d JB |
1446 | spi_support_dt(starget)) |
1447 | return TARGET_ATTRIBUTE_HELPER(dt); | |
ee959b00 | 1448 | else if (attr == &dev_attr_qas.attr && |
9b161a4d JB |
1449 | spi_support_qas(starget)) |
1450 | return TARGET_ATTRIBUTE_HELPER(qas); | |
ea443190 JB |
1451 | else if (attr == &dev_attr_max_qas.attr && |
1452 | spi_support_qas(starget)) | |
1453 | return TARGET_ATTRIBUTE_HELPER(qas); | |
ee959b00 | 1454 | else if (attr == &dev_attr_wr_flow.attr && |
9b161a4d JB |
1455 | spi_support_ius(starget)) |
1456 | return TARGET_ATTRIBUTE_HELPER(wr_flow); | |
ee959b00 | 1457 | else if (attr == &dev_attr_rd_strm.attr && |
9b161a4d JB |
1458 | spi_support_ius(starget)) |
1459 | return TARGET_ATTRIBUTE_HELPER(rd_strm); | |
ee959b00 | 1460 | else if (attr == &dev_attr_rti.attr && |
9b161a4d JB |
1461 | spi_support_ius(starget)) |
1462 | return TARGET_ATTRIBUTE_HELPER(rti); | |
ee959b00 | 1463 | else if (attr == &dev_attr_pcomp_en.attr && |
9b161a4d JB |
1464 | spi_support_ius(starget)) |
1465 | return TARGET_ATTRIBUTE_HELPER(pcomp_en); | |
ee959b00 | 1466 | else if (attr == &dev_attr_hold_mcs.attr && |
9b161a4d JB |
1467 | spi_support_ius(starget)) |
1468 | return TARGET_ATTRIBUTE_HELPER(hold_mcs); | |
ee959b00 | 1469 | else if (attr == &dev_attr_revalidate.attr) |
352f6bb4 | 1470 | return S_IWUSR; |
9b161a4d JB |
1471 | |
1472 | return 0; | |
1473 | } | |
1474 | ||
1475 | static struct attribute *target_attributes[] = { | |
ee959b00 TJ |
1476 | &dev_attr_period.attr, |
1477 | &dev_attr_min_period.attr, | |
1478 | &dev_attr_offset.attr, | |
1479 | &dev_attr_max_offset.attr, | |
1480 | &dev_attr_width.attr, | |
1481 | &dev_attr_max_width.attr, | |
1482 | &dev_attr_iu.attr, | |
ea443190 | 1483 | &dev_attr_max_iu.attr, |
ee959b00 TJ |
1484 | &dev_attr_dt.attr, |
1485 | &dev_attr_qas.attr, | |
ea443190 | 1486 | &dev_attr_max_qas.attr, |
ee959b00 TJ |
1487 | &dev_attr_wr_flow.attr, |
1488 | &dev_attr_rd_strm.attr, | |
1489 | &dev_attr_rti.attr, | |
1490 | &dev_attr_pcomp_en.attr, | |
1491 | &dev_attr_hold_mcs.attr, | |
1492 | &dev_attr_revalidate.attr, | |
9b161a4d JB |
1493 | NULL |
1494 | }; | |
1495 | ||
1496 | static struct attribute_group target_attribute_group = { | |
1497 | .attrs = target_attributes, | |
1498 | .is_visible = target_attribute_is_visible, | |
1499 | }; | |
1500 | ||
1501 | static int spi_target_configure(struct transport_container *tc, | |
1502 | struct device *dev, | |
ee959b00 | 1503 | struct device *cdev) |
9b161a4d JB |
1504 | { |
1505 | struct kobject *kobj = &cdev->kobj; | |
352f6bb4 JB |
1506 | |
1507 | /* force an update based on parameters read from the device */ | |
1508 | sysfs_update_group(kobj, &target_attribute_group); | |
9b161a4d JB |
1509 | |
1510 | return 0; | |
1511 | } | |
1512 | ||
1da177e4 LT |
1513 | struct scsi_transport_template * |
1514 | spi_attach_transport(struct spi_function_template *ft) | |
1515 | { | |
24669f75 JS |
1516 | struct spi_internal *i = kzalloc(sizeof(struct spi_internal), |
1517 | GFP_KERNEL); | |
1518 | ||
1da177e4 LT |
1519 | if (unlikely(!i)) |
1520 | return NULL; | |
1521 | ||
1da177e4 | 1522 | i->t.target_attrs.ac.class = &spi_transport_class.class; |
9b161a4d | 1523 | i->t.target_attrs.ac.grp = &target_attribute_group; |
1da177e4 LT |
1524 | i->t.target_attrs.ac.match = spi_target_match; |
1525 | transport_container_register(&i->t.target_attrs); | |
1526 | i->t.target_size = sizeof(struct spi_transport_attrs); | |
1527 | i->t.host_attrs.ac.class = &spi_host_class.class; | |
9b161a4d | 1528 | i->t.host_attrs.ac.grp = &host_attribute_group; |
1da177e4 LT |
1529 | i->t.host_attrs.ac.match = spi_host_match; |
1530 | transport_container_register(&i->t.host_attrs); | |
1531 | i->t.host_size = sizeof(struct spi_host_attrs); | |
1532 | i->f = ft; | |
1533 | ||
1da177e4 LT |
1534 | return &i->t; |
1535 | } | |
1536 | EXPORT_SYMBOL(spi_attach_transport); | |
1537 | ||
1538 | void spi_release_transport(struct scsi_transport_template *t) | |
1539 | { | |
1540 | struct spi_internal *i = to_spi_internal(t); | |
1541 | ||
1542 | transport_container_unregister(&i->t.target_attrs); | |
1543 | transport_container_unregister(&i->t.host_attrs); | |
1544 | ||
1545 | kfree(i); | |
1546 | } | |
1547 | EXPORT_SYMBOL(spi_release_transport); | |
1548 | ||
1549 | static __init int spi_transport_init(void) | |
1550 | { | |
a9e0edb6 JB |
1551 | int error = scsi_dev_info_add_list(SCSI_DEVINFO_SPI, |
1552 | "SCSI Parallel Transport Class"); | |
1553 | if (!error) { | |
1554 | int i; | |
1555 | ||
1556 | for (i = 0; spi_static_device_list[i].vendor; i++) | |
1557 | scsi_dev_info_list_add_keyed(1, /* compatible */ | |
1558 | spi_static_device_list[i].vendor, | |
1559 | spi_static_device_list[i].model, | |
1560 | NULL, | |
1561 | spi_static_device_list[i].flags, | |
1562 | SCSI_DEVINFO_SPI); | |
1563 | } | |
1564 | ||
1565 | error = transport_class_register(&spi_transport_class); | |
1da177e4 LT |
1566 | if (error) |
1567 | return error; | |
1568 | error = anon_transport_class_register(&spi_device_class); | |
1569 | return transport_class_register(&spi_host_class); | |
1570 | } | |
1571 | ||
1572 | static void __exit spi_transport_exit(void) | |
1573 | { | |
1574 | transport_class_unregister(&spi_transport_class); | |
1575 | anon_transport_class_unregister(&spi_device_class); | |
1576 | transport_class_unregister(&spi_host_class); | |
a9e0edb6 | 1577 | scsi_dev_info_remove_list(SCSI_DEVINFO_SPI); |
1da177e4 LT |
1578 | } |
1579 | ||
1580 | MODULE_AUTHOR("Martin Hicks"); | |
1581 | MODULE_DESCRIPTION("SPI Transport Attributes"); | |
1582 | MODULE_LICENSE("GPL"); | |
1583 | ||
1584 | module_init(spi_transport_init); | |
1585 | module_exit(spi_transport_exit); |