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 | 34 | #include <scsi/scsi_eh.h> |
50668633 | 35 | #include <scsi/scsi_tcq.h> |
1da177e4 LT |
36 | #include <scsi/scsi_transport.h> |
37 | #include <scsi/scsi_transport_spi.h> | |
38 | ||
d872ebe4 | 39 | #define SPI_NUM_ATTRS 14 /* increase this if you add attributes */ |
1da177e4 LT |
40 | #define SPI_OTHER_ATTRS 1 /* Increase this if you add "always |
41 | * on" attributes */ | |
42 | #define SPI_HOST_ATTRS 1 | |
43 | ||
44 | #define SPI_MAX_ECHO_BUFFER_SIZE 4096 | |
45 | ||
949bf797 JB |
46 | #define DV_LOOPS 3 |
47 | #define DV_TIMEOUT (10*HZ) | |
48 | #define DV_RETRIES 3 /* should only need at most | |
49 | * two cc/ua clears */ | |
50 | ||
a9e0edb6 JB |
51 | /* Our blacklist flags */ |
52 | enum { | |
53 | SPI_BLIST_NOIUS = 0x1, | |
54 | }; | |
55 | ||
56 | /* blacklist table, modelled on scsi_devinfo.c */ | |
57 | static struct { | |
58 | char *vendor; | |
59 | char *model; | |
60 | unsigned flags; | |
61 | } spi_static_device_list[] __initdata = { | |
62 | {"HP", "Ultrium 3-SCSI", SPI_BLIST_NOIUS }, | |
63 | {"IBM", "ULTRIUM-TD3", SPI_BLIST_NOIUS }, | |
64 | {NULL, NULL, 0} | |
65 | }; | |
66 | ||
1da177e4 | 67 | /* Private data accessors (keep these out of the header file) */ |
dfdc58ba | 68 | #define spi_dv_in_progress(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_in_progress) |
d158d261 | 69 | #define spi_dv_mutex(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_mutex) |
1da177e4 LT |
70 | |
71 | struct spi_internal { | |
72 | struct scsi_transport_template t; | |
73 | struct spi_function_template *f; | |
1da177e4 LT |
74 | }; |
75 | ||
76 | #define to_spi_internal(tmpl) container_of(tmpl, struct spi_internal, t) | |
77 | ||
78 | static const int ppr_to_ps[] = { | |
79 | /* The PPR values 0-6 are reserved, fill them in when | |
80 | * the committee defines them */ | |
81 | -1, /* 0x00 */ | |
82 | -1, /* 0x01 */ | |
83 | -1, /* 0x02 */ | |
84 | -1, /* 0x03 */ | |
85 | -1, /* 0x04 */ | |
86 | -1, /* 0x05 */ | |
87 | -1, /* 0x06 */ | |
88 | 3125, /* 0x07 */ | |
89 | 6250, /* 0x08 */ | |
90 | 12500, /* 0x09 */ | |
91 | 25000, /* 0x0a */ | |
92 | 30300, /* 0x0b */ | |
93 | 50000, /* 0x0c */ | |
94 | }; | |
95 | /* The PPR values at which you calculate the period in ns by multiplying | |
96 | * by 4 */ | |
97 | #define SPI_STATIC_PPR 0x0c | |
98 | ||
99 | static int sprint_frac(char *dest, int value, int denom) | |
100 | { | |
101 | int frac = value % denom; | |
102 | int result = sprintf(dest, "%d", value / denom); | |
103 | ||
104 | if (frac == 0) | |
105 | return result; | |
106 | dest[result++] = '.'; | |
107 | ||
108 | do { | |
109 | denom /= 10; | |
110 | sprintf(dest + result, "%d", frac / denom); | |
111 | result++; | |
112 | frac %= denom; | |
113 | } while (frac); | |
114 | ||
115 | dest[result++] = '\0'; | |
116 | return result; | |
117 | } | |
118 | ||
33aa687d JB |
119 | static int spi_execute(struct scsi_device *sdev, const void *cmd, |
120 | enum dma_data_direction dir, | |
121 | void *buffer, unsigned bufflen, | |
122 | struct scsi_sense_hdr *sshdr) | |
949bf797 | 123 | { |
33aa687d JB |
124 | int i, result; |
125 | unsigned char sense[SCSI_SENSE_BUFFERSIZE]; | |
949bf797 JB |
126 | |
127 | for(i = 0; i < DV_RETRIES; i++) { | |
33aa687d JB |
128 | result = scsi_execute(sdev, cmd, dir, buffer, bufflen, |
129 | sense, DV_TIMEOUT, /* retries */ 1, | |
6000a368 MC |
130 | REQ_FAILFAST_DEV | |
131 | REQ_FAILFAST_TRANSPORT | | |
f4f4e47e FT |
132 | REQ_FAILFAST_DRIVER, |
133 | NULL); | |
4d3fef9e | 134 | if (driver_byte(result) & DRIVER_SENSE) { |
33aa687d JB |
135 | struct scsi_sense_hdr sshdr_tmp; |
136 | if (!sshdr) | |
137 | sshdr = &sshdr_tmp; | |
138 | ||
4ed381ee | 139 | if (scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, |
33aa687d JB |
140 | sshdr) |
141 | && sshdr->sense_key == UNIT_ATTENTION) | |
949bf797 JB |
142 | continue; |
143 | } | |
144 | break; | |
145 | } | |
33aa687d | 146 | return result; |
949bf797 JB |
147 | } |
148 | ||
1da177e4 LT |
149 | static struct { |
150 | enum spi_signal_type value; | |
151 | char *name; | |
152 | } signal_types[] = { | |
153 | { SPI_SIGNAL_UNKNOWN, "unknown" }, | |
154 | { SPI_SIGNAL_SE, "SE" }, | |
155 | { SPI_SIGNAL_LVD, "LVD" }, | |
156 | { SPI_SIGNAL_HVD, "HVD" }, | |
157 | }; | |
158 | ||
159 | static inline const char *spi_signal_to_string(enum spi_signal_type type) | |
160 | { | |
161 | int i; | |
162 | ||
6391a113 | 163 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
1da177e4 LT |
164 | if (type == signal_types[i].value) |
165 | return signal_types[i].name; | |
166 | } | |
167 | return NULL; | |
168 | } | |
169 | static inline enum spi_signal_type spi_signal_to_value(const char *name) | |
170 | { | |
171 | int i, len; | |
172 | ||
6391a113 | 173 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
1da177e4 LT |
174 | len = strlen(signal_types[i].name); |
175 | if (strncmp(name, signal_types[i].name, len) == 0 && | |
176 | (name[len] == '\n' || name[len] == '\0')) | |
177 | return signal_types[i].value; | |
178 | } | |
179 | return SPI_SIGNAL_UNKNOWN; | |
180 | } | |
181 | ||
d0a7e574 | 182 | static int spi_host_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 183 | struct device *cdev) |
1da177e4 LT |
184 | { |
185 | struct Scsi_Host *shost = dev_to_shost(dev); | |
186 | ||
187 | spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
9b161a4d JB |
192 | static int spi_host_configure(struct transport_container *tc, |
193 | struct device *dev, | |
ee959b00 | 194 | struct device *cdev); |
9b161a4d | 195 | |
1da177e4 LT |
196 | static DECLARE_TRANSPORT_CLASS(spi_host_class, |
197 | "spi_host", | |
198 | spi_host_setup, | |
199 | NULL, | |
9b161a4d | 200 | spi_host_configure); |
1da177e4 LT |
201 | |
202 | static int spi_host_match(struct attribute_container *cont, | |
203 | struct device *dev) | |
204 | { | |
205 | struct Scsi_Host *shost; | |
1da177e4 LT |
206 | |
207 | if (!scsi_is_host_device(dev)) | |
208 | return 0; | |
209 | ||
210 | shost = dev_to_shost(dev); | |
211 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
212 | != &spi_host_class.class) | |
213 | return 0; | |
214 | ||
9b161a4d | 215 | return &shost->transportt->host_attrs.ac == cont; |
1da177e4 LT |
216 | } |
217 | ||
9b161a4d JB |
218 | static int spi_target_configure(struct transport_container *tc, |
219 | struct device *dev, | |
ee959b00 | 220 | struct device *cdev); |
9b161a4d | 221 | |
d0a7e574 JB |
222 | static int spi_device_configure(struct transport_container *tc, |
223 | struct device *dev, | |
ee959b00 | 224 | struct device *cdev) |
1da177e4 LT |
225 | { |
226 | struct scsi_device *sdev = to_scsi_device(dev); | |
227 | struct scsi_target *starget = sdev->sdev_target; | |
a9e0edb6 JB |
228 | unsigned bflags = scsi_get_device_flags_keyed(sdev, &sdev->inquiry[8], |
229 | &sdev->inquiry[16], | |
230 | SCSI_DEVINFO_SPI); | |
1da177e4 LT |
231 | |
232 | /* Populate the target capability fields with the values | |
233 | * gleaned from the device inquiry */ | |
234 | ||
235 | spi_support_sync(starget) = scsi_device_sync(sdev); | |
236 | spi_support_wide(starget) = scsi_device_wide(sdev); | |
237 | spi_support_dt(starget) = scsi_device_dt(sdev); | |
238 | spi_support_dt_only(starget) = scsi_device_dt_only(sdev); | |
239 | spi_support_ius(starget) = scsi_device_ius(sdev); | |
a9e0edb6 JB |
240 | if (bflags & SPI_BLIST_NOIUS) { |
241 | dev_info(dev, "Information Units disabled by blacklist\n"); | |
242 | spi_support_ius(starget) = 0; | |
243 | } | |
1da177e4 LT |
244 | spi_support_qas(starget) = scsi_device_qas(sdev); |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
d0a7e574 JB |
249 | static int spi_setup_transport_attrs(struct transport_container *tc, |
250 | struct device *dev, | |
ee959b00 | 251 | struct device *cdev) |
1da177e4 LT |
252 | { |
253 | struct scsi_target *starget = to_scsi_target(dev); | |
254 | ||
255 | spi_period(starget) = -1; /* illegal value */ | |
62a86129 | 256 | spi_min_period(starget) = 0; |
1da177e4 | 257 | spi_offset(starget) = 0; /* async */ |
62a86129 | 258 | spi_max_offset(starget) = 255; |
1da177e4 | 259 | spi_width(starget) = 0; /* narrow */ |
62a86129 | 260 | spi_max_width(starget) = 1; |
1da177e4 | 261 | spi_iu(starget) = 0; /* no IU */ |
ea443190 | 262 | spi_max_iu(starget) = 1; |
1da177e4 LT |
263 | spi_dt(starget) = 0; /* ST */ |
264 | spi_qas(starget) = 0; | |
ea443190 | 265 | spi_max_qas(starget) = 1; |
1da177e4 LT |
266 | spi_wr_flow(starget) = 0; |
267 | spi_rd_strm(starget) = 0; | |
268 | spi_rti(starget) = 0; | |
269 | spi_pcomp_en(starget) = 0; | |
d872ebe4 | 270 | spi_hold_mcs(starget) = 0; |
1da177e4 | 271 | spi_dv_pending(starget) = 0; |
dfdc58ba | 272 | spi_dv_in_progress(starget) = 0; |
1da177e4 | 273 | spi_initial_dv(starget) = 0; |
d158d261 | 274 | mutex_init(&spi_dv_mutex(starget)); |
1da177e4 LT |
275 | |
276 | return 0; | |
277 | } | |
278 | ||
62a86129 JB |
279 | #define spi_transport_show_simple(field, format_string) \ |
280 | \ | |
281 | static ssize_t \ | |
ee959b00 TJ |
282 | show_spi_transport_##field(struct device *dev, \ |
283 | struct device_attribute *attr, char *buf) \ | |
62a86129 | 284 | { \ |
ee959b00 | 285 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
286 | struct spi_transport_attrs *tp; \ |
287 | \ | |
288 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
289 | return snprintf(buf, 20, format_string, tp->field); \ | |
290 | } | |
291 | ||
292 | #define spi_transport_store_simple(field, format_string) \ | |
293 | \ | |
294 | static ssize_t \ | |
ee959b00 TJ |
295 | store_spi_transport_##field(struct device *dev, \ |
296 | struct device_attribute *attr, \ | |
297 | const char *buf, size_t count) \ | |
62a86129 JB |
298 | { \ |
299 | int val; \ | |
ee959b00 | 300 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
301 | struct spi_transport_attrs *tp; \ |
302 | \ | |
303 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
304 | val = simple_strtoul(buf, NULL, 0); \ | |
305 | tp->field = val; \ | |
306 | return count; \ | |
307 | } | |
308 | ||
1da177e4 LT |
309 | #define spi_transport_show_function(field, format_string) \ |
310 | \ | |
311 | static ssize_t \ | |
ee959b00 TJ |
312 | show_spi_transport_##field(struct device *dev, \ |
313 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 314 | { \ |
ee959b00 | 315 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
316 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
317 | struct spi_transport_attrs *tp; \ | |
318 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
319 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
320 | if (i->f->get_##field) \ | |
321 | i->f->get_##field(starget); \ | |
322 | return snprintf(buf, 20, format_string, tp->field); \ | |
323 | } | |
324 | ||
325 | #define spi_transport_store_function(field, format_string) \ | |
326 | static ssize_t \ | |
ee959b00 TJ |
327 | store_spi_transport_##field(struct device *dev, \ |
328 | struct device_attribute *attr, \ | |
329 | const char *buf, size_t count) \ | |
1da177e4 LT |
330 | { \ |
331 | int val; \ | |
ee959b00 | 332 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
333 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
334 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
335 | \ | |
9b161a4d JB |
336 | if (!i->f->set_##field) \ |
337 | return -EINVAL; \ | |
1da177e4 | 338 | val = simple_strtoul(buf, NULL, 0); \ |
9b161a4d | 339 | i->f->set_##field(starget, val); \ |
62a86129 JB |
340 | return count; \ |
341 | } | |
342 | ||
343 | #define spi_transport_store_max(field, format_string) \ | |
344 | static ssize_t \ | |
ee959b00 TJ |
345 | store_spi_transport_##field(struct device *dev, \ |
346 | struct device_attribute *attr, \ | |
347 | const char *buf, size_t count) \ | |
62a86129 JB |
348 | { \ |
349 | int val; \ | |
ee959b00 | 350 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
351 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
352 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
353 | struct spi_transport_attrs *tp \ | |
354 | = (struct spi_transport_attrs *)&starget->starget_data; \ | |
355 | \ | |
9b161a4d JB |
356 | if (i->f->set_##field) \ |
357 | return -EINVAL; \ | |
62a86129 JB |
358 | val = simple_strtoul(buf, NULL, 0); \ |
359 | if (val > tp->max_##field) \ | |
360 | val = tp->max_##field; \ | |
1da177e4 LT |
361 | i->f->set_##field(starget, val); \ |
362 | return count; \ | |
363 | } | |
364 | ||
365 | #define spi_transport_rd_attr(field, format_string) \ | |
366 | spi_transport_show_function(field, format_string) \ | |
367 | spi_transport_store_function(field, format_string) \ | |
ee959b00 TJ |
368 | static DEVICE_ATTR(field, S_IRUGO, \ |
369 | show_spi_transport_##field, \ | |
370 | store_spi_transport_##field); | |
1da177e4 | 371 | |
62a86129 JB |
372 | #define spi_transport_simple_attr(field, format_string) \ |
373 | spi_transport_show_simple(field, format_string) \ | |
374 | spi_transport_store_simple(field, format_string) \ | |
ee959b00 TJ |
375 | static DEVICE_ATTR(field, S_IRUGO, \ |
376 | show_spi_transport_##field, \ | |
377 | store_spi_transport_##field); | |
62a86129 JB |
378 | |
379 | #define spi_transport_max_attr(field, format_string) \ | |
380 | spi_transport_show_function(field, format_string) \ | |
381 | spi_transport_store_max(field, format_string) \ | |
382 | spi_transport_simple_attr(max_##field, format_string) \ | |
ee959b00 TJ |
383 | static DEVICE_ATTR(field, S_IRUGO, \ |
384 | show_spi_transport_##field, \ | |
385 | store_spi_transport_##field); | |
62a86129 | 386 | |
1da177e4 | 387 | /* The Parallel SCSI Tranport Attributes: */ |
62a86129 JB |
388 | spi_transport_max_attr(offset, "%d\n"); |
389 | spi_transport_max_attr(width, "%d\n"); | |
ea443190 | 390 | spi_transport_max_attr(iu, "%d\n"); |
1da177e4 | 391 | spi_transport_rd_attr(dt, "%d\n"); |
ea443190 | 392 | spi_transport_max_attr(qas, "%d\n"); |
1da177e4 LT |
393 | spi_transport_rd_attr(wr_flow, "%d\n"); |
394 | spi_transport_rd_attr(rd_strm, "%d\n"); | |
395 | spi_transport_rd_attr(rti, "%d\n"); | |
396 | spi_transport_rd_attr(pcomp_en, "%d\n"); | |
d872ebe4 | 397 | spi_transport_rd_attr(hold_mcs, "%d\n"); |
1da177e4 | 398 | |
e8bac9e0 JB |
399 | /* we only care about the first child device that's a real SCSI device |
400 | * so we return 1 to terminate the iteration when we find it */ | |
9a881f16 | 401 | static int child_iter(struct device *dev, void *data) |
402 | { | |
e8bac9e0 JB |
403 | if (!scsi_is_sdev_device(dev)) |
404 | return 0; | |
9a881f16 | 405 | |
e8bac9e0 | 406 | spi_dv_device(to_scsi_device(dev)); |
9a881f16 | 407 | return 1; |
408 | } | |
409 | ||
1da177e4 | 410 | static ssize_t |
ee959b00 TJ |
411 | store_spi_revalidate(struct device *dev, struct device_attribute *attr, |
412 | const char *buf, size_t count) | |
1da177e4 | 413 | { |
ee959b00 | 414 | struct scsi_target *starget = transport_class_to_starget(dev); |
1da177e4 | 415 | |
9a881f16 | 416 | device_for_each_child(&starget->dev, NULL, child_iter); |
1da177e4 LT |
417 | return count; |
418 | } | |
ee959b00 | 419 | static DEVICE_ATTR(revalidate, S_IWUSR, NULL, store_spi_revalidate); |
1da177e4 LT |
420 | |
421 | /* Translate the period into ns according to the current spec | |
422 | * for SDTR/PPR messages */ | |
ef72582e | 423 | static int period_to_str(char *buf, int period) |
1da177e4 | 424 | { |
1da177e4 | 425 | int len, picosec; |
1da177e4 | 426 | |
62a86129 | 427 | if (period < 0 || period > 0xff) { |
1da177e4 | 428 | picosec = -1; |
62a86129 JB |
429 | } else if (period <= SPI_STATIC_PPR) { |
430 | picosec = ppr_to_ps[period]; | |
1da177e4 | 431 | } else { |
62a86129 | 432 | picosec = period * 4000; |
1da177e4 LT |
433 | } |
434 | ||
435 | if (picosec == -1) { | |
436 | len = sprintf(buf, "reserved"); | |
437 | } else { | |
438 | len = sprint_frac(buf, picosec, 1000); | |
439 | } | |
440 | ||
ef72582e MW |
441 | return len; |
442 | } | |
443 | ||
444 | static ssize_t | |
ea697e45 | 445 | show_spi_transport_period_helper(char *buf, int period) |
ef72582e MW |
446 | { |
447 | int len = period_to_str(buf, period); | |
1da177e4 LT |
448 | buf[len++] = '\n'; |
449 | buf[len] = '\0'; | |
450 | return len; | |
451 | } | |
452 | ||
453 | static ssize_t | |
ee959b00 | 454 | store_spi_transport_period_helper(struct device *dev, const char *buf, |
62a86129 | 455 | size_t count, int *periodp) |
1da177e4 | 456 | { |
1da177e4 LT |
457 | int j, picosec, period = -1; |
458 | char *endp; | |
459 | ||
460 | picosec = simple_strtoul(buf, &endp, 10) * 1000; | |
461 | if (*endp == '.') { | |
462 | int mult = 100; | |
463 | do { | |
464 | endp++; | |
465 | if (!isdigit(*endp)) | |
466 | break; | |
467 | picosec += (*endp - '0') * mult; | |
468 | mult /= 10; | |
469 | } while (mult > 0); | |
470 | } | |
471 | ||
472 | for (j = 0; j <= SPI_STATIC_PPR; j++) { | |
473 | if (ppr_to_ps[j] < picosec) | |
474 | continue; | |
475 | period = j; | |
476 | break; | |
477 | } | |
478 | ||
479 | if (period == -1) | |
480 | period = picosec / 4000; | |
481 | ||
482 | if (period > 0xff) | |
483 | period = 0xff; | |
484 | ||
62a86129 | 485 | *periodp = period; |
1da177e4 LT |
486 | |
487 | return count; | |
488 | } | |
489 | ||
62a86129 | 490 | static ssize_t |
ee959b00 TJ |
491 | show_spi_transport_period(struct device *dev, |
492 | struct device_attribute *attr, char *buf) | |
62a86129 | 493 | { |
ee959b00 | 494 | struct scsi_target *starget = transport_class_to_starget(dev); |
62a86129 JB |
495 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
496 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
497 | struct spi_transport_attrs *tp = | |
498 | (struct spi_transport_attrs *)&starget->starget_data; | |
499 | ||
500 | if (i->f->get_period) | |
501 | i->f->get_period(starget); | |
502 | ||
ea697e45 | 503 | return show_spi_transport_period_helper(buf, tp->period); |
62a86129 JB |
504 | } |
505 | ||
506 | static ssize_t | |
ee959b00 TJ |
507 | store_spi_transport_period(struct device *cdev, struct device_attribute *attr, |
508 | const char *buf, size_t count) | |
62a86129 JB |
509 | { |
510 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
511 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
512 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
513 | struct spi_transport_attrs *tp = | |
514 | (struct spi_transport_attrs *)&starget->starget_data; | |
515 | int period, retval; | |
516 | ||
9b161a4d JB |
517 | if (!i->f->set_period) |
518 | return -EINVAL; | |
519 | ||
62a86129 JB |
520 | retval = store_spi_transport_period_helper(cdev, buf, count, &period); |
521 | ||
522 | if (period < tp->min_period) | |
523 | period = tp->min_period; | |
524 | ||
525 | i->f->set_period(starget, period); | |
526 | ||
527 | return retval; | |
528 | } | |
529 | ||
ee959b00 TJ |
530 | static DEVICE_ATTR(period, S_IRUGO, |
531 | show_spi_transport_period, | |
532 | store_spi_transport_period); | |
1da177e4 | 533 | |
62a86129 | 534 | static ssize_t |
ee959b00 TJ |
535 | show_spi_transport_min_period(struct device *cdev, |
536 | struct device_attribute *attr, char *buf) | |
62a86129 JB |
537 | { |
538 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
9b161a4d JB |
539 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
540 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
62a86129 JB |
541 | struct spi_transport_attrs *tp = |
542 | (struct spi_transport_attrs *)&starget->starget_data; | |
543 | ||
9b161a4d JB |
544 | if (!i->f->set_period) |
545 | return -EINVAL; | |
546 | ||
ea697e45 | 547 | return show_spi_transport_period_helper(buf, tp->min_period); |
62a86129 JB |
548 | } |
549 | ||
550 | static ssize_t | |
ee959b00 TJ |
551 | store_spi_transport_min_period(struct device *cdev, |
552 | struct device_attribute *attr, | |
553 | const char *buf, size_t count) | |
62a86129 JB |
554 | { |
555 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
556 | struct spi_transport_attrs *tp = | |
557 | (struct spi_transport_attrs *)&starget->starget_data; | |
558 | ||
559 | return store_spi_transport_period_helper(cdev, buf, count, | |
560 | &tp->min_period); | |
561 | } | |
562 | ||
563 | ||
ee959b00 TJ |
564 | static DEVICE_ATTR(min_period, S_IRUGO, |
565 | show_spi_transport_min_period, | |
566 | store_spi_transport_min_period); | |
62a86129 JB |
567 | |
568 | ||
ee959b00 TJ |
569 | static ssize_t show_spi_host_signalling(struct device *cdev, |
570 | struct device_attribute *attr, | |
571 | char *buf) | |
1da177e4 LT |
572 | { |
573 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
574 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
575 | ||
576 | if (i->f->get_signalling) | |
577 | i->f->get_signalling(shost); | |
578 | ||
579 | return sprintf(buf, "%s\n", spi_signal_to_string(spi_signalling(shost))); | |
580 | } | |
ee959b00 TJ |
581 | static ssize_t store_spi_host_signalling(struct device *dev, |
582 | struct device_attribute *attr, | |
1da177e4 LT |
583 | const char *buf, size_t count) |
584 | { | |
ee959b00 | 585 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
586 | struct spi_internal *i = to_spi_internal(shost->transportt); |
587 | enum spi_signal_type type = spi_signal_to_value(buf); | |
588 | ||
9b161a4d JB |
589 | if (!i->f->set_signalling) |
590 | return -EINVAL; | |
591 | ||
1da177e4 LT |
592 | if (type != SPI_SIGNAL_UNKNOWN) |
593 | i->f->set_signalling(shost, type); | |
594 | ||
595 | return count; | |
596 | } | |
ee959b00 TJ |
597 | static DEVICE_ATTR(signalling, S_IRUGO, |
598 | show_spi_host_signalling, | |
599 | store_spi_host_signalling); | |
1da177e4 | 600 | |
0ac2377b HR |
601 | static ssize_t show_spi_host_width(struct device *cdev, |
602 | struct device_attribute *attr, | |
603 | char *buf) | |
604 | { | |
605 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
606 | ||
607 | return sprintf(buf, "%s\n", shost->max_id == 16 ? "wide" : "narrow"); | |
608 | } | |
609 | static DEVICE_ATTR(host_width, S_IRUGO, | |
610 | show_spi_host_width, NULL); | |
611 | ||
612 | static ssize_t show_spi_host_hba_id(struct device *cdev, | |
613 | struct device_attribute *attr, | |
614 | char *buf) | |
615 | { | |
616 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
617 | ||
618 | return sprintf(buf, "%d\n", shost->this_id); | |
619 | } | |
620 | static DEVICE_ATTR(hba_id, S_IRUGO, | |
621 | show_spi_host_hba_id, NULL); | |
622 | ||
1da177e4 LT |
623 | #define DV_SET(x, y) \ |
624 | if(i->f->set_##x) \ | |
625 | i->f->set_##x(sdev->sdev_target, y) | |
626 | ||
1da177e4 LT |
627 | enum spi_compare_returns { |
628 | SPI_COMPARE_SUCCESS, | |
629 | SPI_COMPARE_FAILURE, | |
630 | SPI_COMPARE_SKIP_TEST, | |
631 | }; | |
632 | ||
633 | ||
634 | /* This is for read/write Domain Validation: If the device supports | |
635 | * an echo buffer, we do read/write tests to it */ | |
636 | static enum spi_compare_returns | |
33aa687d | 637 | spi_dv_device_echo_buffer(struct scsi_device *sdev, u8 *buffer, |
1da177e4 LT |
638 | u8 *ptr, const int retries) |
639 | { | |
1da177e4 | 640 | int len = ptr - buffer; |
33aa687d | 641 | int j, k, r, result; |
1da177e4 | 642 | unsigned int pattern = 0x0000ffff; |
33aa687d | 643 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
644 | |
645 | const char spi_write_buffer[] = { | |
646 | WRITE_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 | |
647 | }; | |
648 | const char spi_read_buffer[] = { | |
649 | READ_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 | |
650 | }; | |
651 | ||
652 | /* set up the pattern buffer. Doesn't matter if we spill | |
653 | * slightly beyond since that's where the read buffer is */ | |
654 | for (j = 0; j < len; ) { | |
655 | ||
656 | /* fill the buffer with counting (test a) */ | |
657 | for ( ; j < min(len, 32); j++) | |
658 | buffer[j] = j; | |
659 | k = j; | |
660 | /* fill the buffer with alternating words of 0x0 and | |
661 | * 0xffff (test b) */ | |
662 | for ( ; j < min(len, k + 32); j += 2) { | |
663 | u16 *word = (u16 *)&buffer[j]; | |
664 | ||
665 | *word = (j & 0x02) ? 0x0000 : 0xffff; | |
666 | } | |
667 | k = j; | |
668 | /* fill with crosstalk (alternating 0x5555 0xaaa) | |
669 | * (test c) */ | |
670 | for ( ; j < min(len, k + 32); j += 2) { | |
671 | u16 *word = (u16 *)&buffer[j]; | |
672 | ||
673 | *word = (j & 0x02) ? 0x5555 : 0xaaaa; | |
674 | } | |
675 | k = j; | |
676 | /* fill with shifting bits (test d) */ | |
677 | for ( ; j < min(len, k + 32); j += 4) { | |
678 | u32 *word = (unsigned int *)&buffer[j]; | |
679 | u32 roll = (pattern & 0x80000000) ? 1 : 0; | |
680 | ||
681 | *word = pattern; | |
682 | pattern = (pattern << 1) | roll; | |
683 | } | |
684 | /* don't bother with random data (test e) */ | |
685 | } | |
686 | ||
687 | for (r = 0; r < retries; r++) { | |
33aa687d JB |
688 | result = spi_execute(sdev, spi_write_buffer, DMA_TO_DEVICE, |
689 | buffer, len, &sshdr); | |
690 | if(result || !scsi_device_online(sdev)) { | |
1da177e4 LT |
691 | |
692 | scsi_device_set_state(sdev, SDEV_QUIESCE); | |
33aa687d | 693 | if (scsi_sense_valid(&sshdr) |
1da177e4 LT |
694 | && sshdr.sense_key == ILLEGAL_REQUEST |
695 | /* INVALID FIELD IN CDB */ | |
696 | && sshdr.asc == 0x24 && sshdr.ascq == 0x00) | |
697 | /* This would mean that the drive lied | |
698 | * to us about supporting an echo | |
699 | * buffer (unfortunately some Western | |
700 | * Digital drives do precisely this) | |
701 | */ | |
702 | return SPI_COMPARE_SKIP_TEST; | |
703 | ||
704 | ||
9ccfc756 | 705 | sdev_printk(KERN_ERR, sdev, "Write Buffer failure %x\n", result); |
1da177e4 LT |
706 | return SPI_COMPARE_FAILURE; |
707 | } | |
708 | ||
709 | memset(ptr, 0, len); | |
33aa687d JB |
710 | spi_execute(sdev, spi_read_buffer, DMA_FROM_DEVICE, |
711 | ptr, len, NULL); | |
1da177e4 LT |
712 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
713 | ||
714 | if (memcmp(buffer, ptr, len) != 0) | |
715 | return SPI_COMPARE_FAILURE; | |
716 | } | |
717 | return SPI_COMPARE_SUCCESS; | |
718 | } | |
719 | ||
720 | /* This is for the simplest form of Domain Validation: a read test | |
721 | * on the inquiry data from the device */ | |
722 | static enum spi_compare_returns | |
33aa687d | 723 | spi_dv_device_compare_inquiry(struct scsi_device *sdev, u8 *buffer, |
1da177e4 LT |
724 | u8 *ptr, const int retries) |
725 | { | |
33aa687d JB |
726 | int r, result; |
727 | const int len = sdev->inquiry_len; | |
1da177e4 LT |
728 | const char spi_inquiry[] = { |
729 | INQUIRY, 0, 0, 0, len, 0 | |
730 | }; | |
731 | ||
732 | for (r = 0; r < retries; r++) { | |
1da177e4 LT |
733 | memset(ptr, 0, len); |
734 | ||
33aa687d JB |
735 | result = spi_execute(sdev, spi_inquiry, DMA_FROM_DEVICE, |
736 | ptr, len, NULL); | |
1da177e4 | 737 | |
33aa687d | 738 | if(result || !scsi_device_online(sdev)) { |
1da177e4 LT |
739 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
740 | return SPI_COMPARE_FAILURE; | |
741 | } | |
742 | ||
743 | /* If we don't have the inquiry data already, the | |
744 | * first read gets it */ | |
745 | if (ptr == buffer) { | |
746 | ptr += len; | |
747 | --r; | |
748 | continue; | |
749 | } | |
750 | ||
751 | if (memcmp(buffer, ptr, len) != 0) | |
752 | /* failure */ | |
753 | return SPI_COMPARE_FAILURE; | |
754 | } | |
755 | return SPI_COMPARE_SUCCESS; | |
756 | } | |
757 | ||
758 | static enum spi_compare_returns | |
33aa687d | 759 | spi_dv_retrain(struct scsi_device *sdev, u8 *buffer, u8 *ptr, |
1da177e4 | 760 | enum spi_compare_returns |
33aa687d | 761 | (*compare_fn)(struct scsi_device *, u8 *, u8 *, int)) |
1da177e4 | 762 | { |
33aa687d | 763 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
9a8bc9b8 | 764 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 LT |
765 | int period = 0, prevperiod = 0; |
766 | enum spi_compare_returns retval; | |
767 | ||
768 | ||
769 | for (;;) { | |
770 | int newperiod; | |
33aa687d | 771 | retval = compare_fn(sdev, buffer, ptr, DV_LOOPS); |
1da177e4 LT |
772 | |
773 | if (retval == SPI_COMPARE_SUCCESS | |
774 | || retval == SPI_COMPARE_SKIP_TEST) | |
775 | break; | |
776 | ||
777 | /* OK, retrain, fallback */ | |
9a8bc9b8 JB |
778 | if (i->f->get_iu) |
779 | i->f->get_iu(starget); | |
780 | if (i->f->get_qas) | |
781 | i->f->get_qas(starget); | |
1da177e4 LT |
782 | if (i->f->get_period) |
783 | i->f->get_period(sdev->sdev_target); | |
9a8bc9b8 JB |
784 | |
785 | /* Here's the fallback sequence; first try turning off | |
786 | * IU, then QAS (if we can control them), then finally | |
787 | * fall down the periods */ | |
788 | if (i->f->set_iu && spi_iu(starget)) { | |
9ccfc756 | 789 | starget_printk(KERN_ERR, starget, "Domain Validation Disabing Information Units\n"); |
9a8bc9b8 JB |
790 | DV_SET(iu, 0); |
791 | } else if (i->f->set_qas && spi_qas(starget)) { | |
9ccfc756 | 792 | starget_printk(KERN_ERR, starget, "Domain Validation Disabing Quick Arbitration and Selection\n"); |
9a8bc9b8 JB |
793 | DV_SET(qas, 0); |
794 | } else { | |
795 | newperiod = spi_period(starget); | |
796 | period = newperiod > period ? newperiod : period; | |
797 | if (period < 0x0d) | |
798 | period++; | |
799 | else | |
800 | period += period >> 1; | |
801 | ||
802 | if (unlikely(period > 0xff || period == prevperiod)) { | |
803 | /* Total failure; set to async and return */ | |
9ccfc756 | 804 | starget_printk(KERN_ERR, starget, "Domain Validation Failure, dropping back to Asynchronous\n"); |
9a8bc9b8 JB |
805 | DV_SET(offset, 0); |
806 | return SPI_COMPARE_FAILURE; | |
807 | } | |
9ccfc756 | 808 | starget_printk(KERN_ERR, starget, "Domain Validation detected failure, dropping back\n"); |
9a8bc9b8 JB |
809 | DV_SET(period, period); |
810 | prevperiod = period; | |
1da177e4 | 811 | } |
1da177e4 LT |
812 | } |
813 | return retval; | |
814 | } | |
815 | ||
816 | static int | |
33aa687d | 817 | spi_dv_device_get_echo_buffer(struct scsi_device *sdev, u8 *buffer) |
1da177e4 | 818 | { |
33aa687d | 819 | int l, result; |
1da177e4 LT |
820 | |
821 | /* first off do a test unit ready. This can error out | |
822 | * because of reservations or some other reason. If it | |
823 | * fails, the device won't let us write to the echo buffer | |
824 | * so just return failure */ | |
825 | ||
826 | const char spi_test_unit_ready[] = { | |
827 | TEST_UNIT_READY, 0, 0, 0, 0, 0 | |
828 | }; | |
829 | ||
830 | const char spi_read_buffer_descriptor[] = { | |
831 | READ_BUFFER, 0x0b, 0, 0, 0, 0, 0, 0, 4, 0 | |
832 | }; | |
833 | ||
834 | ||
1da177e4 LT |
835 | /* We send a set of three TURs to clear any outstanding |
836 | * unit attention conditions if they exist (Otherwise the | |
837 | * buffer tests won't be happy). If the TUR still fails | |
838 | * (reservation conflict, device not ready, etc) just | |
839 | * skip the write tests */ | |
840 | for (l = 0; ; l++) { | |
33aa687d JB |
841 | result = spi_execute(sdev, spi_test_unit_ready, DMA_NONE, |
842 | NULL, 0, NULL); | |
1da177e4 | 843 | |
33aa687d | 844 | if(result) { |
1da177e4 LT |
845 | if(l >= 3) |
846 | return 0; | |
847 | } else { | |
848 | /* TUR succeeded */ | |
849 | break; | |
850 | } | |
851 | } | |
852 | ||
33aa687d JB |
853 | result = spi_execute(sdev, spi_read_buffer_descriptor, |
854 | DMA_FROM_DEVICE, buffer, 4, NULL); | |
1da177e4 | 855 | |
33aa687d | 856 | if (result) |
1da177e4 LT |
857 | /* Device has no echo buffer */ |
858 | return 0; | |
859 | ||
860 | return buffer[3] + ((buffer[2] & 0x1f) << 8); | |
861 | } | |
862 | ||
863 | static void | |
33aa687d | 864 | spi_dv_device_internal(struct scsi_device *sdev, u8 *buffer) |
1da177e4 | 865 | { |
33aa687d | 866 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
62a86129 | 867 | struct scsi_target *starget = sdev->sdev_target; |
60eef257 | 868 | struct Scsi_Host *shost = sdev->host; |
1da177e4 | 869 | int len = sdev->inquiry_len; |
2302827c JB |
870 | int min_period = spi_min_period(starget); |
871 | int max_width = spi_max_width(starget); | |
1da177e4 LT |
872 | /* first set us up for narrow async */ |
873 | DV_SET(offset, 0); | |
874 | DV_SET(width, 0); | |
2302827c | 875 | |
33aa687d | 876 | if (spi_dv_device_compare_inquiry(sdev, buffer, buffer, DV_LOOPS) |
1da177e4 | 877 | != SPI_COMPARE_SUCCESS) { |
9ccfc756 | 878 | starget_printk(KERN_ERR, starget, "Domain Validation Initial Inquiry Failed\n"); |
1da177e4 LT |
879 | /* FIXME: should probably offline the device here? */ |
880 | return; | |
881 | } | |
882 | ||
9872b81c | 883 | if (!spi_support_wide(starget)) { |
2302827c JB |
884 | spi_max_width(starget) = 0; |
885 | max_width = 0; | |
886 | } | |
887 | ||
1da177e4 | 888 | /* test width */ |
2302827c | 889 | if (i->f->set_width && max_width) { |
9a8bc9b8 | 890 | i->f->set_width(starget, 1); |
62a86129 | 891 | |
33aa687d | 892 | if (spi_dv_device_compare_inquiry(sdev, buffer, |
1da177e4 LT |
893 | buffer + len, |
894 | DV_LOOPS) | |
895 | != SPI_COMPARE_SUCCESS) { | |
9ccfc756 | 896 | starget_printk(KERN_ERR, starget, "Wide Transfers Fail\n"); |
9a8bc9b8 | 897 | i->f->set_width(starget, 0); |
2302827c JB |
898 | /* Make sure we don't force wide back on by asking |
899 | * for a transfer period that requires it */ | |
900 | max_width = 0; | |
901 | if (min_period < 10) | |
902 | min_period = 10; | |
1da177e4 LT |
903 | } |
904 | } | |
905 | ||
906 | if (!i->f->set_period) | |
907 | return; | |
908 | ||
909 | /* device can't handle synchronous */ | |
9872b81c | 910 | if (!spi_support_sync(starget) && !spi_support_dt(starget)) |
1da177e4 LT |
911 | return; |
912 | ||
349cd7cf JB |
913 | /* len == -1 is the signal that we need to ascertain the |
914 | * presence of an echo buffer before trying to use it. len == | |
915 | * 0 means we don't have an echo buffer */ | |
916 | len = -1; | |
1da177e4 LT |
917 | |
918 | retry: | |
919 | ||
920 | /* now set up to the maximum */ | |
62a86129 | 921 | DV_SET(offset, spi_max_offset(starget)); |
2302827c JB |
922 | DV_SET(period, min_period); |
923 | ||
9a8bc9b8 JB |
924 | /* try QAS requests; this should be harmless to set if the |
925 | * target supports it */ | |
9872b81c | 926 | if (spi_support_qas(starget) && spi_max_qas(starget)) { |
eb1dd68b | 927 | DV_SET(qas, 1); |
dfdc58ba JB |
928 | } else { |
929 | DV_SET(qas, 0); | |
930 | } | |
931 | ||
9872b81c JB |
932 | if (spi_support_ius(starget) && spi_max_iu(starget) && |
933 | min_period < 9) { | |
dfdc58ba | 934 | /* This u320 (or u640). Set IU transfers */ |
eb1dd68b | 935 | DV_SET(iu, 1); |
dfdc58ba | 936 | /* Then set the optional parameters */ |
9a8bc9b8 JB |
937 | DV_SET(rd_strm, 1); |
938 | DV_SET(wr_flow, 1); | |
939 | DV_SET(rti, 1); | |
2302827c | 940 | if (min_period == 8) |
9a8bc9b8 | 941 | DV_SET(pcomp_en, 1); |
dfdc58ba JB |
942 | } else { |
943 | DV_SET(iu, 0); | |
9a8bc9b8 | 944 | } |
dfdc58ba | 945 | |
60eef257 JB |
946 | /* now that we've done all this, actually check the bus |
947 | * signal type (if known). Some devices are stupid on | |
948 | * a SE bus and still claim they can try LVD only settings */ | |
949 | if (i->f->get_signalling) | |
950 | i->f->get_signalling(shost); | |
951 | if (spi_signalling(shost) == SPI_SIGNAL_SE || | |
dfdc58ba | 952 | spi_signalling(shost) == SPI_SIGNAL_HVD || |
9872b81c | 953 | !spi_support_dt(starget)) { |
60eef257 | 954 | DV_SET(dt, 0); |
dfdc58ba JB |
955 | } else { |
956 | DV_SET(dt, 1); | |
957 | } | |
2302827c JB |
958 | /* set width last because it will pull all the other |
959 | * parameters down to required values */ | |
960 | DV_SET(width, max_width); | |
961 | ||
349cd7cf JB |
962 | /* Do the read only INQUIRY tests */ |
963 | spi_dv_retrain(sdev, buffer, buffer + sdev->inquiry_len, | |
964 | spi_dv_device_compare_inquiry); | |
965 | /* See if we actually managed to negotiate and sustain DT */ | |
966 | if (i->f->get_dt) | |
967 | i->f->get_dt(starget); | |
968 | ||
969 | /* see if the device has an echo buffer. If it does we can do | |
970 | * the SPI pattern write tests. Because of some broken | |
971 | * devices, we *only* try this on a device that has actually | |
972 | * negotiated DT */ | |
973 | ||
974 | if (len == -1 && spi_dt(starget)) | |
975 | len = spi_dv_device_get_echo_buffer(sdev, buffer); | |
1da177e4 | 976 | |
349cd7cf | 977 | if (len <= 0) { |
9ccfc756 | 978 | starget_printk(KERN_INFO, starget, "Domain Validation skipping write tests\n"); |
1da177e4 LT |
979 | return; |
980 | } | |
981 | ||
982 | if (len > SPI_MAX_ECHO_BUFFER_SIZE) { | |
9ccfc756 | 983 | starget_printk(KERN_WARNING, starget, "Echo buffer size %d is too big, trimming to %d\n", len, SPI_MAX_ECHO_BUFFER_SIZE); |
1da177e4 LT |
984 | len = SPI_MAX_ECHO_BUFFER_SIZE; |
985 | } | |
986 | ||
33aa687d | 987 | if (spi_dv_retrain(sdev, buffer, buffer + len, |
1da177e4 LT |
988 | spi_dv_device_echo_buffer) |
989 | == SPI_COMPARE_SKIP_TEST) { | |
990 | /* OK, the stupid drive can't do a write echo buffer | |
991 | * test after all, fall back to the read tests */ | |
992 | len = 0; | |
993 | goto retry; | |
994 | } | |
995 | } | |
996 | ||
997 | ||
998 | /** spi_dv_device - Do Domain Validation on the device | |
999 | * @sdev: scsi device to validate | |
1000 | * | |
1001 | * Performs the domain validation on the given device in the | |
1002 | * current execution thread. Since DV operations may sleep, | |
1003 | * the current thread must have user context. Also no SCSI | |
1004 | * related locks that would deadlock I/O issued by the DV may | |
1005 | * be held. | |
1006 | */ | |
1007 | void | |
1008 | spi_dv_device(struct scsi_device *sdev) | |
1009 | { | |
1da177e4 LT |
1010 | struct scsi_target *starget = sdev->sdev_target; |
1011 | u8 *buffer; | |
1012 | const int len = SPI_MAX_ECHO_BUFFER_SIZE*2; | |
1013 | ||
89a342ca | 1014 | if (unlikely(spi_dv_in_progress(starget))) |
33aa687d | 1015 | return; |
1da177e4 | 1016 | |
89a342ca | 1017 | if (unlikely(scsi_device_get(sdev))) |
dfdc58ba JB |
1018 | return; |
1019 | spi_dv_in_progress(starget) = 1; | |
1020 | ||
24669f75 | 1021 | buffer = kzalloc(len, GFP_KERNEL); |
1da177e4 LT |
1022 | |
1023 | if (unlikely(!buffer)) | |
1024 | goto out_put; | |
1025 | ||
1da177e4 LT |
1026 | /* We need to verify that the actual device will quiesce; the |
1027 | * later target quiesce is just a nice to have */ | |
1028 | if (unlikely(scsi_device_quiesce(sdev))) | |
1029 | goto out_free; | |
1030 | ||
1031 | scsi_target_quiesce(starget); | |
1032 | ||
1033 | spi_dv_pending(starget) = 1; | |
d158d261 | 1034 | mutex_lock(&spi_dv_mutex(starget)); |
1da177e4 | 1035 | |
9ccfc756 | 1036 | starget_printk(KERN_INFO, starget, "Beginning Domain Validation\n"); |
1da177e4 | 1037 | |
33aa687d | 1038 | spi_dv_device_internal(sdev, buffer); |
1da177e4 | 1039 | |
9ccfc756 | 1040 | starget_printk(KERN_INFO, starget, "Ending Domain Validation\n"); |
1da177e4 | 1041 | |
d158d261 | 1042 | mutex_unlock(&spi_dv_mutex(starget)); |
1da177e4 LT |
1043 | spi_dv_pending(starget) = 0; |
1044 | ||
1045 | scsi_target_resume(starget); | |
1046 | ||
1047 | spi_initial_dv(starget) = 1; | |
1048 | ||
1049 | out_free: | |
1050 | kfree(buffer); | |
1051 | out_put: | |
dfdc58ba | 1052 | spi_dv_in_progress(starget) = 0; |
1da177e4 | 1053 | scsi_device_put(sdev); |
1da177e4 LT |
1054 | } |
1055 | EXPORT_SYMBOL(spi_dv_device); | |
1056 | ||
1057 | struct work_queue_wrapper { | |
1058 | struct work_struct work; | |
1059 | struct scsi_device *sdev; | |
1060 | }; | |
1061 | ||
1062 | static void | |
c4028958 | 1063 | spi_dv_device_work_wrapper(struct work_struct *work) |
1da177e4 | 1064 | { |
c4028958 DH |
1065 | struct work_queue_wrapper *wqw = |
1066 | container_of(work, struct work_queue_wrapper, work); | |
1da177e4 LT |
1067 | struct scsi_device *sdev = wqw->sdev; |
1068 | ||
1069 | kfree(wqw); | |
1070 | spi_dv_device(sdev); | |
1071 | spi_dv_pending(sdev->sdev_target) = 0; | |
1072 | scsi_device_put(sdev); | |
1073 | } | |
1074 | ||
1075 | ||
1076 | /** | |
1077 | * spi_schedule_dv_device - schedule domain validation to occur on the device | |
1078 | * @sdev: The device to validate | |
1079 | * | |
1080 | * Identical to spi_dv_device() above, except that the DV will be | |
1081 | * scheduled to occur in a workqueue later. All memory allocations | |
1082 | * are atomic, so may be called from any context including those holding | |
1083 | * SCSI locks. | |
1084 | */ | |
1085 | void | |
1086 | spi_schedule_dv_device(struct scsi_device *sdev) | |
1087 | { | |
1088 | struct work_queue_wrapper *wqw = | |
1089 | kmalloc(sizeof(struct work_queue_wrapper), GFP_ATOMIC); | |
1090 | ||
1091 | if (unlikely(!wqw)) | |
1092 | return; | |
1093 | ||
1094 | if (unlikely(spi_dv_pending(sdev->sdev_target))) { | |
1095 | kfree(wqw); | |
1096 | return; | |
1097 | } | |
1098 | /* Set pending early (dv_device doesn't check it, only sets it) */ | |
1099 | spi_dv_pending(sdev->sdev_target) = 1; | |
1100 | if (unlikely(scsi_device_get(sdev))) { | |
1101 | kfree(wqw); | |
1102 | spi_dv_pending(sdev->sdev_target) = 0; | |
1103 | return; | |
1104 | } | |
1105 | ||
c4028958 | 1106 | INIT_WORK(&wqw->work, spi_dv_device_work_wrapper); |
1da177e4 LT |
1107 | wqw->sdev = sdev; |
1108 | ||
1109 | schedule_work(&wqw->work); | |
1110 | } | |
1111 | EXPORT_SYMBOL(spi_schedule_dv_device); | |
1112 | ||
1113 | /** | |
1114 | * spi_display_xfer_agreement - Print the current target transfer agreement | |
1115 | * @starget: The target for which to display the agreement | |
1116 | * | |
1117 | * Each SPI port is required to maintain a transfer agreement for each | |
1118 | * other port on the bus. This function prints a one-line summary of | |
1119 | * the current agreement; more detailed information is available in sysfs. | |
1120 | */ | |
1121 | void spi_display_xfer_agreement(struct scsi_target *starget) | |
1122 | { | |
1123 | struct spi_transport_attrs *tp; | |
1124 | tp = (struct spi_transport_attrs *)&starget->starget_data; | |
1125 | ||
1126 | if (tp->offset > 0 && tp->period > 0) { | |
1127 | unsigned int picosec, kb100; | |
1128 | char *scsi = "FAST-?"; | |
1129 | char tmp[8]; | |
1130 | ||
1131 | if (tp->period <= SPI_STATIC_PPR) { | |
1132 | picosec = ppr_to_ps[tp->period]; | |
1133 | switch (tp->period) { | |
1134 | case 7: scsi = "FAST-320"; break; | |
1135 | case 8: scsi = "FAST-160"; break; | |
1136 | case 9: scsi = "FAST-80"; break; | |
1137 | case 10: | |
1138 | case 11: scsi = "FAST-40"; break; | |
1139 | case 12: scsi = "FAST-20"; break; | |
1140 | } | |
1141 | } else { | |
1142 | picosec = tp->period * 4000; | |
1143 | if (tp->period < 25) | |
1144 | scsi = "FAST-20"; | |
1145 | else if (tp->period < 50) | |
1146 | scsi = "FAST-10"; | |
1147 | else | |
1148 | scsi = "FAST-5"; | |
1149 | } | |
1150 | ||
1151 | kb100 = (10000000 + picosec / 2) / picosec; | |
1152 | if (tp->width) | |
1153 | kb100 *= 2; | |
1154 | sprint_frac(tmp, picosec, 1000); | |
1155 | ||
1156 | dev_info(&starget->dev, | |
d872ebe4 JB |
1157 | "%s %sSCSI %d.%d MB/s %s%s%s%s%s%s%s%s (%s ns, offset %d)\n", |
1158 | scsi, tp->width ? "WIDE " : "", kb100/10, kb100 % 10, | |
1159 | tp->dt ? "DT" : "ST", | |
1160 | tp->iu ? " IU" : "", | |
1161 | tp->qas ? " QAS" : "", | |
1162 | tp->rd_strm ? " RDSTRM" : "", | |
1163 | tp->rti ? " RTI" : "", | |
1164 | tp->wr_flow ? " WRFLOW" : "", | |
1165 | tp->pcomp_en ? " PCOMP" : "", | |
1166 | tp->hold_mcs ? " HMCS" : "", | |
1167 | tmp, tp->offset); | |
1da177e4 | 1168 | } else { |
493ff4ee | 1169 | dev_info(&starget->dev, "%sasynchronous\n", |
1da177e4 LT |
1170 | tp->width ? "wide " : ""); |
1171 | } | |
1172 | } | |
1173 | EXPORT_SYMBOL(spi_display_xfer_agreement); | |
1174 | ||
6ea3c0b2 MW |
1175 | int spi_populate_width_msg(unsigned char *msg, int width) |
1176 | { | |
1177 | msg[0] = EXTENDED_MESSAGE; | |
1178 | msg[1] = 2; | |
1179 | msg[2] = EXTENDED_WDTR; | |
1180 | msg[3] = width; | |
1181 | return 4; | |
1182 | } | |
38e14f89 | 1183 | EXPORT_SYMBOL_GPL(spi_populate_width_msg); |
6ea3c0b2 MW |
1184 | |
1185 | int spi_populate_sync_msg(unsigned char *msg, int period, int offset) | |
1186 | { | |
1187 | msg[0] = EXTENDED_MESSAGE; | |
1188 | msg[1] = 3; | |
1189 | msg[2] = EXTENDED_SDTR; | |
1190 | msg[3] = period; | |
1191 | msg[4] = offset; | |
1192 | return 5; | |
1193 | } | |
38e14f89 | 1194 | EXPORT_SYMBOL_GPL(spi_populate_sync_msg); |
6ea3c0b2 MW |
1195 | |
1196 | int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, | |
1197 | int width, int options) | |
1198 | { | |
1199 | msg[0] = EXTENDED_MESSAGE; | |
1200 | msg[1] = 6; | |
1201 | msg[2] = EXTENDED_PPR; | |
1202 | msg[3] = period; | |
1203 | msg[4] = 0; | |
1204 | msg[5] = offset; | |
1205 | msg[6] = width; | |
1206 | msg[7] = options; | |
1207 | return 8; | |
1208 | } | |
38e14f89 | 1209 | EXPORT_SYMBOL_GPL(spi_populate_ppr_msg); |
6ea3c0b2 | 1210 | |
50668633 CH |
1211 | /** |
1212 | * spi_populate_tag_msg - place a tag message in a buffer | |
1213 | * @msg: pointer to the area to place the tag | |
1214 | * @cmd: pointer to the scsi command for the tag | |
1215 | * | |
1216 | * Notes: | |
1217 | * designed to create the correct type of tag message for the | |
1218 | * particular request. Returns the size of the tag message. | |
1219 | * May return 0 if TCQ is disabled for this device. | |
1220 | **/ | |
1221 | int spi_populate_tag_msg(unsigned char *msg, struct scsi_cmnd *cmd) | |
1222 | { | |
1223 | if (cmd->flags & SCMD_TAGGED) { | |
68d81f40 | 1224 | *msg++ = SIMPLE_QUEUE_TAG; |
50668633 CH |
1225 | *msg++ = cmd->request->tag; |
1226 | return 2; | |
1227 | } | |
1228 | ||
1229 | return 0; | |
1230 | } | |
1231 | EXPORT_SYMBOL_GPL(spi_populate_tag_msg); | |
1232 | ||
410ca5c7 MW |
1233 | #ifdef CONFIG_SCSI_CONSTANTS |
1234 | static const char * const one_byte_msgs[] = { | |
72df0ebf | 1235 | /* 0x00 */ "Task Complete", NULL /* Extended Message */, "Save Pointers", |
410ca5c7 | 1236 | /* 0x03 */ "Restore Pointers", "Disconnect", "Initiator Error", |
72df0ebf | 1237 | /* 0x06 */ "Abort Task Set", "Message Reject", "Nop", "Message Parity Error", |
410ca5c7 | 1238 | /* 0x0a */ "Linked Command Complete", "Linked Command Complete w/flag", |
72df0ebf MW |
1239 | /* 0x0c */ "Target Reset", "Abort Task", "Clear Task Set", |
1240 | /* 0x0f */ "Initiate Recovery", "Release Recovery", | |
1241 | /* 0x11 */ "Terminate Process", "Continue Task", "Target Transfer Disable", | |
1242 | /* 0x14 */ NULL, NULL, "Clear ACA", "LUN Reset" | |
410ca5c7 | 1243 | }; |
410ca5c7 MW |
1244 | |
1245 | static const char * const two_byte_msgs[] = { | |
47972153 | 1246 | /* 0x20 */ "Simple Queue Tag", "Head of Queue Tag", "Ordered Queue Tag", |
72df0ebf | 1247 | /* 0x23 */ "Ignore Wide Residue", "ACA" |
410ca5c7 | 1248 | }; |
410ca5c7 MW |
1249 | |
1250 | static const char * const extended_msgs[] = { | |
1251 | /* 0x00 */ "Modify Data Pointer", "Synchronous Data Transfer Request", | |
ef72582e | 1252 | /* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request", |
fc25307d | 1253 | /* 0x04 */ "Parallel Protocol Request", "Modify Bidirectional Data Pointer" |
410ca5c7 | 1254 | }; |
410ca5c7 | 1255 | |
bdd70f2c | 1256 | static void print_nego(const unsigned char *msg, int per, int off, int width) |
ef72582e MW |
1257 | { |
1258 | if (per) { | |
1259 | char buf[20]; | |
1260 | period_to_str(buf, msg[per]); | |
1261 | printk("period = %s ns ", buf); | |
1262 | } | |
1263 | ||
1264 | if (off) | |
1265 | printk("offset = %d ", msg[off]); | |
1266 | if (width) | |
1267 | printk("width = %d ", 8 << msg[width]); | |
1268 | } | |
410ca5c7 | 1269 | |
fc25307d MW |
1270 | static void print_ptr(const unsigned char *msg, int msb, const char *desc) |
1271 | { | |
1272 | int ptr = (msg[msb] << 24) | (msg[msb+1] << 16) | (msg[msb+2] << 8) | | |
1273 | msg[msb+3]; | |
1274 | printk("%s = %d ", desc, ptr); | |
1275 | } | |
1276 | ||
1abfd370 | 1277 | int spi_print_msg(const unsigned char *msg) |
410ca5c7 | 1278 | { |
72df0ebf | 1279 | int len = 1, i; |
410ca5c7 | 1280 | if (msg[0] == EXTENDED_MESSAGE) { |
fc25307d MW |
1281 | len = 2 + msg[1]; |
1282 | if (len == 2) | |
1283 | len += 256; | |
b32aaffc | 1284 | if (msg[2] < ARRAY_SIZE(extended_msgs)) |
410ca5c7 MW |
1285 | printk ("%s ", extended_msgs[msg[2]]); |
1286 | else | |
1287 | printk ("Extended Message, reserved code (0x%02x) ", | |
1288 | (int) msg[2]); | |
1289 | switch (msg[2]) { | |
1290 | case EXTENDED_MODIFY_DATA_POINTER: | |
fc25307d | 1291 | print_ptr(msg, 3, "pointer"); |
410ca5c7 MW |
1292 | break; |
1293 | case EXTENDED_SDTR: | |
ef72582e | 1294 | print_nego(msg, 3, 4, 0); |
410ca5c7 MW |
1295 | break; |
1296 | case EXTENDED_WDTR: | |
ef72582e MW |
1297 | print_nego(msg, 0, 0, 3); |
1298 | break; | |
1299 | case EXTENDED_PPR: | |
1300 | print_nego(msg, 3, 5, 6); | |
410ca5c7 | 1301 | break; |
fc25307d MW |
1302 | case EXTENDED_MODIFY_BIDI_DATA_PTR: |
1303 | print_ptr(msg, 3, "out"); | |
1304 | print_ptr(msg, 7, "in"); | |
1305 | break; | |
410ca5c7 MW |
1306 | default: |
1307 | for (i = 2; i < len; ++i) | |
1308 | printk("%02x ", msg[i]); | |
1309 | } | |
1310 | /* Identify */ | |
1311 | } else if (msg[0] & 0x80) { | |
1312 | printk("Identify disconnect %sallowed %s %d ", | |
1313 | (msg[0] & 0x40) ? "" : "not ", | |
1314 | (msg[0] & 0x20) ? "target routine" : "lun", | |
1315 | msg[0] & 0x7); | |
410ca5c7 MW |
1316 | /* Normal One byte */ |
1317 | } else if (msg[0] < 0x1f) { | |
72df0ebf | 1318 | if (msg[0] < ARRAY_SIZE(one_byte_msgs) && one_byte_msgs[msg[0]]) |
e24d873d | 1319 | printk("%s ", one_byte_msgs[msg[0]]); |
410ca5c7 MW |
1320 | else |
1321 | printk("reserved (%02x) ", msg[0]); | |
72df0ebf MW |
1322 | } else if (msg[0] == 0x55) { |
1323 | printk("QAS Request "); | |
410ca5c7 MW |
1324 | /* Two byte */ |
1325 | } else if (msg[0] <= 0x2f) { | |
b32aaffc | 1326 | if ((msg[0] - 0x20) < ARRAY_SIZE(two_byte_msgs)) |
410ca5c7 MW |
1327 | printk("%s %02x ", two_byte_msgs[msg[0] - 0x20], |
1328 | msg[1]); | |
1329 | else | |
1330 | printk("reserved two byte (%02x %02x) ", | |
1331 | msg[0], msg[1]); | |
1332 | len = 2; | |
1333 | } else | |
e24d873d | 1334 | printk("reserved "); |
410ca5c7 MW |
1335 | return len; |
1336 | } | |
1abfd370 | 1337 | EXPORT_SYMBOL(spi_print_msg); |
410ca5c7 MW |
1338 | |
1339 | #else /* ifndef CONFIG_SCSI_CONSTANTS */ | |
1340 | ||
1abfd370 | 1341 | int spi_print_msg(const unsigned char *msg) |
410ca5c7 | 1342 | { |
72df0ebf | 1343 | int len = 1, i; |
410ca5c7 MW |
1344 | |
1345 | if (msg[0] == EXTENDED_MESSAGE) { | |
fc25307d MW |
1346 | len = 2 + msg[1]; |
1347 | if (len == 2) | |
1348 | len += 256; | |
410ca5c7 MW |
1349 | for (i = 0; i < len; ++i) |
1350 | printk("%02x ", msg[i]); | |
1351 | /* Identify */ | |
1352 | } else if (msg[0] & 0x80) { | |
1353 | printk("%02x ", msg[0]); | |
410ca5c7 | 1354 | /* Normal One byte */ |
597705aa | 1355 | } else if ((msg[0] < 0x1f) || (msg[0] == 0x55)) { |
410ca5c7 | 1356 | printk("%02x ", msg[0]); |
410ca5c7 MW |
1357 | /* Two byte */ |
1358 | } else if (msg[0] <= 0x2f) { | |
1359 | printk("%02x %02x", msg[0], msg[1]); | |
1360 | len = 2; | |
1361 | } else | |
1362 | printk("%02x ", msg[0]); | |
1363 | return len; | |
1364 | } | |
1abfd370 | 1365 | EXPORT_SYMBOL(spi_print_msg); |
410ca5c7 MW |
1366 | #endif /* ! CONFIG_SCSI_CONSTANTS */ |
1367 | ||
1da177e4 LT |
1368 | static int spi_device_match(struct attribute_container *cont, |
1369 | struct device *dev) | |
1370 | { | |
1371 | struct scsi_device *sdev; | |
1372 | struct Scsi_Host *shost; | |
10c1b889 | 1373 | struct spi_internal *i; |
1da177e4 LT |
1374 | |
1375 | if (!scsi_is_sdev_device(dev)) | |
1376 | return 0; | |
1377 | ||
1378 | sdev = to_scsi_device(dev); | |
1379 | shost = sdev->host; | |
1380 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1381 | != &spi_host_class.class) | |
1382 | return 0; | |
1383 | /* Note: this class has no device attributes, so it has | |
1384 | * no per-HBA allocation and thus we don't need to distinguish | |
1385 | * the attribute containers for the device */ | |
10c1b889 JB |
1386 | i = to_spi_internal(shost->transportt); |
1387 | if (i->f->deny_binding && i->f->deny_binding(sdev->sdev_target)) | |
1388 | return 0; | |
1da177e4 LT |
1389 | return 1; |
1390 | } | |
1391 | ||
1392 | static int spi_target_match(struct attribute_container *cont, | |
1393 | struct device *dev) | |
1394 | { | |
1395 | struct Scsi_Host *shost; | |
10c1b889 | 1396 | struct scsi_target *starget; |
1da177e4 LT |
1397 | struct spi_internal *i; |
1398 | ||
1399 | if (!scsi_is_target_device(dev)) | |
1400 | return 0; | |
1401 | ||
1402 | shost = dev_to_shost(dev->parent); | |
1403 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1404 | != &spi_host_class.class) | |
1405 | return 0; | |
1406 | ||
1407 | i = to_spi_internal(shost->transportt); | |
10c1b889 JB |
1408 | starget = to_scsi_target(dev); |
1409 | ||
1410 | if (i->f->deny_binding && i->f->deny_binding(starget)) | |
1411 | return 0; | |
1412 | ||
1da177e4 LT |
1413 | return &i->t.target_attrs.ac == cont; |
1414 | } | |
1415 | ||
1416 | static DECLARE_TRANSPORT_CLASS(spi_transport_class, | |
1417 | "spi_transport", | |
1418 | spi_setup_transport_attrs, | |
1419 | NULL, | |
9b161a4d | 1420 | spi_target_configure); |
1da177e4 LT |
1421 | |
1422 | static DECLARE_ANON_TRANSPORT_CLASS(spi_device_class, | |
1423 | spi_device_match, | |
1424 | spi_device_configure); | |
1425 | ||
9b161a4d | 1426 | static struct attribute *host_attributes[] = { |
ee959b00 | 1427 | &dev_attr_signalling.attr, |
0ac2377b HR |
1428 | &dev_attr_host_width.attr, |
1429 | &dev_attr_hba_id.attr, | |
9b161a4d JB |
1430 | NULL |
1431 | }; | |
1432 | ||
1433 | static struct attribute_group host_attribute_group = { | |
1434 | .attrs = host_attributes, | |
1435 | }; | |
1436 | ||
1437 | static int spi_host_configure(struct transport_container *tc, | |
1438 | struct device *dev, | |
ee959b00 | 1439 | struct device *cdev) |
9b161a4d JB |
1440 | { |
1441 | struct kobject *kobj = &cdev->kobj; | |
1442 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1443 | struct spi_internal *si = to_spi_internal(shost->transportt); | |
ee959b00 | 1444 | struct attribute *attr = &dev_attr_signalling.attr; |
9b161a4d JB |
1445 | int rc = 0; |
1446 | ||
1447 | if (si->f->set_signalling) | |
1448 | rc = sysfs_chmod_file(kobj, attr, attr->mode | S_IWUSR); | |
1449 | ||
1450 | return rc; | |
1451 | } | |
1452 | ||
1453 | /* returns true if we should be showing the variable. Also | |
1454 | * overloads the return by setting 1<<1 if the attribute should | |
1455 | * be writeable */ | |
1456 | #define TARGET_ATTRIBUTE_HELPER(name) \ | |
352f6bb4 JB |
1457 | (si->f->show_##name ? S_IRUGO : 0) | \ |
1458 | (si->f->set_##name ? S_IWUSR : 0) | |
9b161a4d | 1459 | |
587a1f16 | 1460 | static umode_t target_attribute_is_visible(struct kobject *kobj, |
352f6bb4 | 1461 | struct attribute *attr, int i) |
9b161a4d | 1462 | { |
ee959b00 | 1463 | struct device *cdev = container_of(kobj, struct device, kobj); |
9b161a4d JB |
1464 | struct scsi_target *starget = transport_class_to_starget(cdev); |
1465 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1466 | struct spi_internal *si = to_spi_internal(shost->transportt); | |
1467 | ||
ee959b00 | 1468 | if (attr == &dev_attr_period.attr && |
9b161a4d JB |
1469 | spi_support_sync(starget)) |
1470 | return TARGET_ATTRIBUTE_HELPER(period); | |
ee959b00 | 1471 | else if (attr == &dev_attr_min_period.attr && |
9b161a4d JB |
1472 | spi_support_sync(starget)) |
1473 | return TARGET_ATTRIBUTE_HELPER(period); | |
ee959b00 | 1474 | else if (attr == &dev_attr_offset.attr && |
9b161a4d JB |
1475 | spi_support_sync(starget)) |
1476 | return TARGET_ATTRIBUTE_HELPER(offset); | |
ee959b00 | 1477 | else if (attr == &dev_attr_max_offset.attr && |
9b161a4d JB |
1478 | spi_support_sync(starget)) |
1479 | return TARGET_ATTRIBUTE_HELPER(offset); | |
ee959b00 | 1480 | else if (attr == &dev_attr_width.attr && |
9b161a4d JB |
1481 | spi_support_wide(starget)) |
1482 | return TARGET_ATTRIBUTE_HELPER(width); | |
ee959b00 | 1483 | else if (attr == &dev_attr_max_width.attr && |
9b161a4d JB |
1484 | spi_support_wide(starget)) |
1485 | return TARGET_ATTRIBUTE_HELPER(width); | |
ee959b00 | 1486 | else if (attr == &dev_attr_iu.attr && |
9b161a4d JB |
1487 | spi_support_ius(starget)) |
1488 | return TARGET_ATTRIBUTE_HELPER(iu); | |
ea443190 JB |
1489 | else if (attr == &dev_attr_max_iu.attr && |
1490 | spi_support_ius(starget)) | |
1491 | return TARGET_ATTRIBUTE_HELPER(iu); | |
ee959b00 | 1492 | else if (attr == &dev_attr_dt.attr && |
9b161a4d JB |
1493 | spi_support_dt(starget)) |
1494 | return TARGET_ATTRIBUTE_HELPER(dt); | |
ee959b00 | 1495 | else if (attr == &dev_attr_qas.attr && |
9b161a4d JB |
1496 | spi_support_qas(starget)) |
1497 | return TARGET_ATTRIBUTE_HELPER(qas); | |
ea443190 JB |
1498 | else if (attr == &dev_attr_max_qas.attr && |
1499 | spi_support_qas(starget)) | |
1500 | return TARGET_ATTRIBUTE_HELPER(qas); | |
ee959b00 | 1501 | else if (attr == &dev_attr_wr_flow.attr && |
9b161a4d JB |
1502 | spi_support_ius(starget)) |
1503 | return TARGET_ATTRIBUTE_HELPER(wr_flow); | |
ee959b00 | 1504 | else if (attr == &dev_attr_rd_strm.attr && |
9b161a4d JB |
1505 | spi_support_ius(starget)) |
1506 | return TARGET_ATTRIBUTE_HELPER(rd_strm); | |
ee959b00 | 1507 | else if (attr == &dev_attr_rti.attr && |
9b161a4d JB |
1508 | spi_support_ius(starget)) |
1509 | return TARGET_ATTRIBUTE_HELPER(rti); | |
ee959b00 | 1510 | else if (attr == &dev_attr_pcomp_en.attr && |
9b161a4d JB |
1511 | spi_support_ius(starget)) |
1512 | return TARGET_ATTRIBUTE_HELPER(pcomp_en); | |
ee959b00 | 1513 | else if (attr == &dev_attr_hold_mcs.attr && |
9b161a4d JB |
1514 | spi_support_ius(starget)) |
1515 | return TARGET_ATTRIBUTE_HELPER(hold_mcs); | |
ee959b00 | 1516 | else if (attr == &dev_attr_revalidate.attr) |
352f6bb4 | 1517 | return S_IWUSR; |
9b161a4d JB |
1518 | |
1519 | return 0; | |
1520 | } | |
1521 | ||
1522 | static struct attribute *target_attributes[] = { | |
ee959b00 TJ |
1523 | &dev_attr_period.attr, |
1524 | &dev_attr_min_period.attr, | |
1525 | &dev_attr_offset.attr, | |
1526 | &dev_attr_max_offset.attr, | |
1527 | &dev_attr_width.attr, | |
1528 | &dev_attr_max_width.attr, | |
1529 | &dev_attr_iu.attr, | |
ea443190 | 1530 | &dev_attr_max_iu.attr, |
ee959b00 TJ |
1531 | &dev_attr_dt.attr, |
1532 | &dev_attr_qas.attr, | |
ea443190 | 1533 | &dev_attr_max_qas.attr, |
ee959b00 TJ |
1534 | &dev_attr_wr_flow.attr, |
1535 | &dev_attr_rd_strm.attr, | |
1536 | &dev_attr_rti.attr, | |
1537 | &dev_attr_pcomp_en.attr, | |
1538 | &dev_attr_hold_mcs.attr, | |
1539 | &dev_attr_revalidate.attr, | |
9b161a4d JB |
1540 | NULL |
1541 | }; | |
1542 | ||
1543 | static struct attribute_group target_attribute_group = { | |
1544 | .attrs = target_attributes, | |
1545 | .is_visible = target_attribute_is_visible, | |
1546 | }; | |
1547 | ||
1548 | static int spi_target_configure(struct transport_container *tc, | |
1549 | struct device *dev, | |
ee959b00 | 1550 | struct device *cdev) |
9b161a4d JB |
1551 | { |
1552 | struct kobject *kobj = &cdev->kobj; | |
352f6bb4 JB |
1553 | |
1554 | /* force an update based on parameters read from the device */ | |
1555 | sysfs_update_group(kobj, &target_attribute_group); | |
9b161a4d JB |
1556 | |
1557 | return 0; | |
1558 | } | |
1559 | ||
1da177e4 LT |
1560 | struct scsi_transport_template * |
1561 | spi_attach_transport(struct spi_function_template *ft) | |
1562 | { | |
24669f75 JS |
1563 | struct spi_internal *i = kzalloc(sizeof(struct spi_internal), |
1564 | GFP_KERNEL); | |
1565 | ||
1da177e4 LT |
1566 | if (unlikely(!i)) |
1567 | return NULL; | |
1568 | ||
1da177e4 | 1569 | i->t.target_attrs.ac.class = &spi_transport_class.class; |
9b161a4d | 1570 | i->t.target_attrs.ac.grp = &target_attribute_group; |
1da177e4 LT |
1571 | i->t.target_attrs.ac.match = spi_target_match; |
1572 | transport_container_register(&i->t.target_attrs); | |
1573 | i->t.target_size = sizeof(struct spi_transport_attrs); | |
1574 | i->t.host_attrs.ac.class = &spi_host_class.class; | |
9b161a4d | 1575 | i->t.host_attrs.ac.grp = &host_attribute_group; |
1da177e4 LT |
1576 | i->t.host_attrs.ac.match = spi_host_match; |
1577 | transport_container_register(&i->t.host_attrs); | |
1578 | i->t.host_size = sizeof(struct spi_host_attrs); | |
1579 | i->f = ft; | |
1580 | ||
1da177e4 LT |
1581 | return &i->t; |
1582 | } | |
1583 | EXPORT_SYMBOL(spi_attach_transport); | |
1584 | ||
1585 | void spi_release_transport(struct scsi_transport_template *t) | |
1586 | { | |
1587 | struct spi_internal *i = to_spi_internal(t); | |
1588 | ||
1589 | transport_container_unregister(&i->t.target_attrs); | |
1590 | transport_container_unregister(&i->t.host_attrs); | |
1591 | ||
1592 | kfree(i); | |
1593 | } | |
1594 | EXPORT_SYMBOL(spi_release_transport); | |
1595 | ||
1596 | static __init int spi_transport_init(void) | |
1597 | { | |
a9e0edb6 JB |
1598 | int error = scsi_dev_info_add_list(SCSI_DEVINFO_SPI, |
1599 | "SCSI Parallel Transport Class"); | |
1600 | if (!error) { | |
1601 | int i; | |
1602 | ||
1603 | for (i = 0; spi_static_device_list[i].vendor; i++) | |
1604 | scsi_dev_info_list_add_keyed(1, /* compatible */ | |
1605 | spi_static_device_list[i].vendor, | |
1606 | spi_static_device_list[i].model, | |
1607 | NULL, | |
1608 | spi_static_device_list[i].flags, | |
1609 | SCSI_DEVINFO_SPI); | |
1610 | } | |
1611 | ||
1612 | error = transport_class_register(&spi_transport_class); | |
1da177e4 LT |
1613 | if (error) |
1614 | return error; | |
1615 | error = anon_transport_class_register(&spi_device_class); | |
1616 | return transport_class_register(&spi_host_class); | |
1617 | } | |
1618 | ||
1619 | static void __exit spi_transport_exit(void) | |
1620 | { | |
1621 | transport_class_unregister(&spi_transport_class); | |
1622 | anon_transport_class_unregister(&spi_device_class); | |
1623 | transport_class_unregister(&spi_host_class); | |
a9e0edb6 | 1624 | scsi_dev_info_remove_list(SCSI_DEVINFO_SPI); |
1da177e4 LT |
1625 | } |
1626 | ||
1627 | MODULE_AUTHOR("Martin Hicks"); | |
1628 | MODULE_DESCRIPTION("SPI Transport Attributes"); | |
1629 | MODULE_LICENSE("GPL"); | |
1630 | ||
1631 | module_init(spi_transport_init); | |
1632 | module_exit(spi_transport_exit); |