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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> |
203f8c25 | 29 | #include <linux/suspend.h> |
1da177e4 LT |
30 | #include <scsi/scsi.h> |
31 | #include "scsi_priv.h" | |
32 | #include <scsi/scsi_device.h> | |
33 | #include <scsi/scsi_host.h> | |
33aa687d | 34 | #include <scsi/scsi_cmnd.h> |
1da177e4 | 35 | #include <scsi/scsi_eh.h> |
50668633 | 36 | #include <scsi/scsi_tcq.h> |
1da177e4 LT |
37 | #include <scsi/scsi_transport.h> |
38 | #include <scsi/scsi_transport_spi.h> | |
39 | ||
d872ebe4 | 40 | #define SPI_NUM_ATTRS 14 /* increase this if you add attributes */ |
1da177e4 LT |
41 | #define SPI_OTHER_ATTRS 1 /* Increase this if you add "always |
42 | * on" attributes */ | |
43 | #define SPI_HOST_ATTRS 1 | |
44 | ||
45 | #define SPI_MAX_ECHO_BUFFER_SIZE 4096 | |
46 | ||
949bf797 JB |
47 | #define DV_LOOPS 3 |
48 | #define DV_TIMEOUT (10*HZ) | |
49 | #define DV_RETRIES 3 /* should only need at most | |
50 | * two cc/ua clears */ | |
51 | ||
a9e0edb6 JB |
52 | /* Our blacklist flags */ |
53 | enum { | |
093b8886 | 54 | SPI_BLIST_NOIUS = (__force blist_flags_t)0x1, |
a9e0edb6 JB |
55 | }; |
56 | ||
57 | /* blacklist table, modelled on scsi_devinfo.c */ | |
58 | static struct { | |
59 | char *vendor; | |
60 | char *model; | |
093b8886 | 61 | blist_flags_t flags; |
a9e0edb6 JB |
62 | } spi_static_device_list[] __initdata = { |
63 | {"HP", "Ultrium 3-SCSI", SPI_BLIST_NOIUS }, | |
64 | {"IBM", "ULTRIUM-TD3", SPI_BLIST_NOIUS }, | |
65 | {NULL, NULL, 0} | |
66 | }; | |
67 | ||
1da177e4 | 68 | /* Private data accessors (keep these out of the header file) */ |
dfdc58ba | 69 | #define spi_dv_in_progress(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_in_progress) |
d158d261 | 70 | #define spi_dv_mutex(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_mutex) |
1da177e4 LT |
71 | |
72 | struct spi_internal { | |
73 | struct scsi_transport_template t; | |
74 | struct spi_function_template *f; | |
1da177e4 LT |
75 | }; |
76 | ||
77 | #define to_spi_internal(tmpl) container_of(tmpl, struct spi_internal, t) | |
78 | ||
79 | static const int ppr_to_ps[] = { | |
80 | /* The PPR values 0-6 are reserved, fill them in when | |
81 | * the committee defines them */ | |
82 | -1, /* 0x00 */ | |
83 | -1, /* 0x01 */ | |
84 | -1, /* 0x02 */ | |
85 | -1, /* 0x03 */ | |
86 | -1, /* 0x04 */ | |
87 | -1, /* 0x05 */ | |
88 | -1, /* 0x06 */ | |
89 | 3125, /* 0x07 */ | |
90 | 6250, /* 0x08 */ | |
91 | 12500, /* 0x09 */ | |
92 | 25000, /* 0x0a */ | |
93 | 30300, /* 0x0b */ | |
94 | 50000, /* 0x0c */ | |
95 | }; | |
96 | /* The PPR values at which you calculate the period in ns by multiplying | |
97 | * by 4 */ | |
98 | #define SPI_STATIC_PPR 0x0c | |
99 | ||
100 | static int sprint_frac(char *dest, int value, int denom) | |
101 | { | |
102 | int frac = value % denom; | |
103 | int result = sprintf(dest, "%d", value / denom); | |
104 | ||
105 | if (frac == 0) | |
106 | return result; | |
107 | dest[result++] = '.'; | |
108 | ||
109 | do { | |
110 | denom /= 10; | |
111 | sprintf(dest + result, "%d", frac / denom); | |
112 | result++; | |
113 | frac %= denom; | |
114 | } while (frac); | |
115 | ||
116 | dest[result++] = '\0'; | |
117 | return result; | |
118 | } | |
119 | ||
33aa687d JB |
120 | static int spi_execute(struct scsi_device *sdev, const void *cmd, |
121 | enum dma_data_direction dir, | |
122 | void *buffer, unsigned bufflen, | |
123 | struct scsi_sense_hdr *sshdr) | |
949bf797 | 124 | { |
33aa687d JB |
125 | int i, result; |
126 | unsigned char sense[SCSI_SENSE_BUFFERSIZE]; | |
76aaf87b CH |
127 | struct scsi_sense_hdr sshdr_tmp; |
128 | ||
129 | if (!sshdr) | |
130 | sshdr = &sshdr_tmp; | |
949bf797 JB |
131 | |
132 | for(i = 0; i < DV_RETRIES; i++) { | |
76aaf87b CH |
133 | result = scsi_execute(sdev, cmd, dir, buffer, bufflen, sense, |
134 | sshdr, DV_TIMEOUT, /* retries */ 1, | |
6000a368 MC |
135 | REQ_FAILFAST_DEV | |
136 | REQ_FAILFAST_TRANSPORT | | |
f4f4e47e | 137 | REQ_FAILFAST_DRIVER, |
76aaf87b CH |
138 | 0, NULL); |
139 | if (!(driver_byte(result) & DRIVER_SENSE) || | |
140 | sshdr->sense_key != UNIT_ATTENTION) | |
141 | break; | |
949bf797 | 142 | } |
33aa687d | 143 | return result; |
949bf797 JB |
144 | } |
145 | ||
1da177e4 LT |
146 | static struct { |
147 | enum spi_signal_type value; | |
148 | char *name; | |
149 | } signal_types[] = { | |
150 | { SPI_SIGNAL_UNKNOWN, "unknown" }, | |
151 | { SPI_SIGNAL_SE, "SE" }, | |
152 | { SPI_SIGNAL_LVD, "LVD" }, | |
153 | { SPI_SIGNAL_HVD, "HVD" }, | |
154 | }; | |
155 | ||
156 | static inline const char *spi_signal_to_string(enum spi_signal_type type) | |
157 | { | |
158 | int i; | |
159 | ||
6391a113 | 160 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
1da177e4 LT |
161 | if (type == signal_types[i].value) |
162 | return signal_types[i].name; | |
163 | } | |
164 | return NULL; | |
165 | } | |
166 | static inline enum spi_signal_type spi_signal_to_value(const char *name) | |
167 | { | |
168 | int i, len; | |
169 | ||
6391a113 | 170 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
1da177e4 LT |
171 | len = strlen(signal_types[i].name); |
172 | if (strncmp(name, signal_types[i].name, len) == 0 && | |
173 | (name[len] == '\n' || name[len] == '\0')) | |
174 | return signal_types[i].value; | |
175 | } | |
176 | return SPI_SIGNAL_UNKNOWN; | |
177 | } | |
178 | ||
d0a7e574 | 179 | static int spi_host_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 180 | struct device *cdev) |
1da177e4 LT |
181 | { |
182 | struct Scsi_Host *shost = dev_to_shost(dev); | |
183 | ||
184 | spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; | |
185 | ||
186 | return 0; | |
187 | } | |
188 | ||
9b161a4d JB |
189 | static int spi_host_configure(struct transport_container *tc, |
190 | struct device *dev, | |
ee959b00 | 191 | struct device *cdev); |
9b161a4d | 192 | |
1da177e4 LT |
193 | static DECLARE_TRANSPORT_CLASS(spi_host_class, |
194 | "spi_host", | |
195 | spi_host_setup, | |
196 | NULL, | |
9b161a4d | 197 | spi_host_configure); |
1da177e4 LT |
198 | |
199 | static int spi_host_match(struct attribute_container *cont, | |
200 | struct device *dev) | |
201 | { | |
202 | struct Scsi_Host *shost; | |
1da177e4 LT |
203 | |
204 | if (!scsi_is_host_device(dev)) | |
205 | return 0; | |
206 | ||
207 | shost = dev_to_shost(dev); | |
208 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
209 | != &spi_host_class.class) | |
210 | return 0; | |
211 | ||
9b161a4d | 212 | return &shost->transportt->host_attrs.ac == cont; |
1da177e4 LT |
213 | } |
214 | ||
9b161a4d JB |
215 | static int spi_target_configure(struct transport_container *tc, |
216 | struct device *dev, | |
ee959b00 | 217 | struct device *cdev); |
9b161a4d | 218 | |
d0a7e574 JB |
219 | static int spi_device_configure(struct transport_container *tc, |
220 | struct device *dev, | |
ee959b00 | 221 | struct device *cdev) |
1da177e4 LT |
222 | { |
223 | struct scsi_device *sdev = to_scsi_device(dev); | |
224 | struct scsi_target *starget = sdev->sdev_target; | |
093b8886 BVA |
225 | blist_flags_t bflags; |
226 | ||
227 | 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 GKH |
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 GKH |
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 | 599 | |
0ac2377b HR |
600 | static ssize_t show_spi_host_width(struct device *cdev, |
601 | struct device_attribute *attr, | |
602 | char *buf) | |
603 | { | |
604 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
605 | ||
606 | return sprintf(buf, "%s\n", shost->max_id == 16 ? "wide" : "narrow"); | |
607 | } | |
608 | static DEVICE_ATTR(host_width, S_IRUGO, | |
609 | show_spi_host_width, NULL); | |
610 | ||
611 | static ssize_t show_spi_host_hba_id(struct device *cdev, | |
612 | struct device_attribute *attr, | |
613 | char *buf) | |
614 | { | |
615 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
616 | ||
617 | return sprintf(buf, "%d\n", shost->this_id); | |
618 | } | |
619 | static DEVICE_ATTR(hba_id, S_IRUGO, | |
620 | show_spi_host_hba_id, NULL); | |
621 | ||
1da177e4 LT |
622 | #define DV_SET(x, y) \ |
623 | if(i->f->set_##x) \ | |
624 | i->f->set_##x(sdev->sdev_target, y) | |
625 | ||
1da177e4 LT |
626 | enum spi_compare_returns { |
627 | SPI_COMPARE_SUCCESS, | |
628 | SPI_COMPARE_FAILURE, | |
629 | SPI_COMPARE_SKIP_TEST, | |
630 | }; | |
631 | ||
632 | ||
633 | /* This is for read/write Domain Validation: If the device supports | |
634 | * an echo buffer, we do read/write tests to it */ | |
635 | static enum spi_compare_returns | |
33aa687d | 636 | spi_dv_device_echo_buffer(struct scsi_device *sdev, u8 *buffer, |
1da177e4 LT |
637 | u8 *ptr, const int retries) |
638 | { | |
1da177e4 | 639 | int len = ptr - buffer; |
33aa687d | 640 | int j, k, r, result; |
1da177e4 | 641 | unsigned int pattern = 0x0000ffff; |
33aa687d | 642 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
643 | |
644 | const char spi_write_buffer[] = { | |
645 | WRITE_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 | |
646 | }; | |
647 | const char spi_read_buffer[] = { | |
648 | READ_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 | |
649 | }; | |
650 | ||
651 | /* set up the pattern buffer. Doesn't matter if we spill | |
652 | * slightly beyond since that's where the read buffer is */ | |
653 | for (j = 0; j < len; ) { | |
654 | ||
655 | /* fill the buffer with counting (test a) */ | |
656 | for ( ; j < min(len, 32); j++) | |
657 | buffer[j] = j; | |
658 | k = j; | |
659 | /* fill the buffer with alternating words of 0x0 and | |
660 | * 0xffff (test b) */ | |
661 | for ( ; j < min(len, k + 32); j += 2) { | |
662 | u16 *word = (u16 *)&buffer[j]; | |
663 | ||
664 | *word = (j & 0x02) ? 0x0000 : 0xffff; | |
665 | } | |
666 | k = j; | |
667 | /* fill with crosstalk (alternating 0x5555 0xaaa) | |
668 | * (test c) */ | |
669 | for ( ; j < min(len, k + 32); j += 2) { | |
670 | u16 *word = (u16 *)&buffer[j]; | |
671 | ||
672 | *word = (j & 0x02) ? 0x5555 : 0xaaaa; | |
673 | } | |
674 | k = j; | |
675 | /* fill with shifting bits (test d) */ | |
676 | for ( ; j < min(len, k + 32); j += 4) { | |
677 | u32 *word = (unsigned int *)&buffer[j]; | |
678 | u32 roll = (pattern & 0x80000000) ? 1 : 0; | |
679 | ||
680 | *word = pattern; | |
681 | pattern = (pattern << 1) | roll; | |
682 | } | |
683 | /* don't bother with random data (test e) */ | |
684 | } | |
685 | ||
686 | for (r = 0; r < retries; r++) { | |
33aa687d JB |
687 | result = spi_execute(sdev, spi_write_buffer, DMA_TO_DEVICE, |
688 | buffer, len, &sshdr); | |
689 | if(result || !scsi_device_online(sdev)) { | |
1da177e4 LT |
690 | |
691 | scsi_device_set_state(sdev, SDEV_QUIESCE); | |
33aa687d | 692 | if (scsi_sense_valid(&sshdr) |
1da177e4 LT |
693 | && sshdr.sense_key == ILLEGAL_REQUEST |
694 | /* INVALID FIELD IN CDB */ | |
695 | && sshdr.asc == 0x24 && sshdr.ascq == 0x00) | |
696 | /* This would mean that the drive lied | |
697 | * to us about supporting an echo | |
698 | * buffer (unfortunately some Western | |
699 | * Digital drives do precisely this) | |
700 | */ | |
701 | return SPI_COMPARE_SKIP_TEST; | |
702 | ||
703 | ||
9ccfc756 | 704 | sdev_printk(KERN_ERR, sdev, "Write Buffer failure %x\n", result); |
1da177e4 LT |
705 | return SPI_COMPARE_FAILURE; |
706 | } | |
707 | ||
708 | memset(ptr, 0, len); | |
33aa687d JB |
709 | spi_execute(sdev, spi_read_buffer, DMA_FROM_DEVICE, |
710 | ptr, len, NULL); | |
1da177e4 LT |
711 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
712 | ||
713 | if (memcmp(buffer, ptr, len) != 0) | |
714 | return SPI_COMPARE_FAILURE; | |
715 | } | |
716 | return SPI_COMPARE_SUCCESS; | |
717 | } | |
718 | ||
719 | /* This is for the simplest form of Domain Validation: a read test | |
720 | * on the inquiry data from the device */ | |
721 | static enum spi_compare_returns | |
33aa687d | 722 | spi_dv_device_compare_inquiry(struct scsi_device *sdev, u8 *buffer, |
1da177e4 LT |
723 | u8 *ptr, const int retries) |
724 | { | |
33aa687d JB |
725 | int r, result; |
726 | const int len = sdev->inquiry_len; | |
1da177e4 LT |
727 | const char spi_inquiry[] = { |
728 | INQUIRY, 0, 0, 0, len, 0 | |
729 | }; | |
730 | ||
731 | for (r = 0; r < retries; r++) { | |
1da177e4 LT |
732 | memset(ptr, 0, len); |
733 | ||
33aa687d JB |
734 | result = spi_execute(sdev, spi_inquiry, DMA_FROM_DEVICE, |
735 | ptr, len, NULL); | |
1da177e4 | 736 | |
33aa687d | 737 | if(result || !scsi_device_online(sdev)) { |
1da177e4 LT |
738 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
739 | return SPI_COMPARE_FAILURE; | |
740 | } | |
741 | ||
742 | /* If we don't have the inquiry data already, the | |
743 | * first read gets it */ | |
744 | if (ptr == buffer) { | |
745 | ptr += len; | |
746 | --r; | |
747 | continue; | |
748 | } | |
749 | ||
750 | if (memcmp(buffer, ptr, len) != 0) | |
751 | /* failure */ | |
752 | return SPI_COMPARE_FAILURE; | |
753 | } | |
754 | return SPI_COMPARE_SUCCESS; | |
755 | } | |
756 | ||
757 | static enum spi_compare_returns | |
33aa687d | 758 | spi_dv_retrain(struct scsi_device *sdev, u8 *buffer, u8 *ptr, |
1da177e4 | 759 | enum spi_compare_returns |
33aa687d | 760 | (*compare_fn)(struct scsi_device *, u8 *, u8 *, int)) |
1da177e4 | 761 | { |
33aa687d | 762 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
9a8bc9b8 | 763 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 LT |
764 | int period = 0, prevperiod = 0; |
765 | enum spi_compare_returns retval; | |
766 | ||
767 | ||
768 | for (;;) { | |
769 | int newperiod; | |
33aa687d | 770 | retval = compare_fn(sdev, buffer, ptr, DV_LOOPS); |
1da177e4 LT |
771 | |
772 | if (retval == SPI_COMPARE_SUCCESS | |
773 | || retval == SPI_COMPARE_SKIP_TEST) | |
774 | break; | |
775 | ||
776 | /* OK, retrain, fallback */ | |
9a8bc9b8 JB |
777 | if (i->f->get_iu) |
778 | i->f->get_iu(starget); | |
779 | if (i->f->get_qas) | |
780 | i->f->get_qas(starget); | |
1da177e4 LT |
781 | if (i->f->get_period) |
782 | i->f->get_period(sdev->sdev_target); | |
9a8bc9b8 JB |
783 | |
784 | /* Here's the fallback sequence; first try turning off | |
785 | * IU, then QAS (if we can control them), then finally | |
786 | * fall down the periods */ | |
787 | if (i->f->set_iu && spi_iu(starget)) { | |
804ff603 | 788 | starget_printk(KERN_ERR, starget, "Domain Validation Disabling Information Units\n"); |
9a8bc9b8 JB |
789 | DV_SET(iu, 0); |
790 | } else if (i->f->set_qas && spi_qas(starget)) { | |
804ff603 | 791 | starget_printk(KERN_ERR, starget, "Domain Validation Disabling Quick Arbitration and Selection\n"); |
9a8bc9b8 JB |
792 | DV_SET(qas, 0); |
793 | } else { | |
794 | newperiod = spi_period(starget); | |
795 | period = newperiod > period ? newperiod : period; | |
796 | if (period < 0x0d) | |
797 | period++; | |
798 | else | |
799 | period += period >> 1; | |
800 | ||
801 | if (unlikely(period > 0xff || period == prevperiod)) { | |
802 | /* Total failure; set to async and return */ | |
9ccfc756 | 803 | starget_printk(KERN_ERR, starget, "Domain Validation Failure, dropping back to Asynchronous\n"); |
9a8bc9b8 JB |
804 | DV_SET(offset, 0); |
805 | return SPI_COMPARE_FAILURE; | |
806 | } | |
9ccfc756 | 807 | starget_printk(KERN_ERR, starget, "Domain Validation detected failure, dropping back\n"); |
9a8bc9b8 JB |
808 | DV_SET(period, period); |
809 | prevperiod = period; | |
1da177e4 | 810 | } |
1da177e4 LT |
811 | } |
812 | return retval; | |
813 | } | |
814 | ||
815 | static int | |
33aa687d | 816 | spi_dv_device_get_echo_buffer(struct scsi_device *sdev, u8 *buffer) |
1da177e4 | 817 | { |
33aa687d | 818 | int l, result; |
1da177e4 LT |
819 | |
820 | /* first off do a test unit ready. This can error out | |
821 | * because of reservations or some other reason. If it | |
822 | * fails, the device won't let us write to the echo buffer | |
823 | * so just return failure */ | |
824 | ||
c62f40bf | 825 | static const char spi_test_unit_ready[] = { |
1da177e4 LT |
826 | TEST_UNIT_READY, 0, 0, 0, 0, 0 |
827 | }; | |
828 | ||
c62f40bf | 829 | static const char spi_read_buffer_descriptor[] = { |
1da177e4 LT |
830 | READ_BUFFER, 0x0b, 0, 0, 0, 0, 0, 0, 4, 0 |
831 | }; | |
832 | ||
833 | ||
1da177e4 LT |
834 | /* We send a set of three TURs to clear any outstanding |
835 | * unit attention conditions if they exist (Otherwise the | |
836 | * buffer tests won't be happy). If the TUR still fails | |
837 | * (reservation conflict, device not ready, etc) just | |
838 | * skip the write tests */ | |
839 | for (l = 0; ; l++) { | |
33aa687d JB |
840 | result = spi_execute(sdev, spi_test_unit_ready, DMA_NONE, |
841 | NULL, 0, NULL); | |
1da177e4 | 842 | |
33aa687d | 843 | if(result) { |
1da177e4 LT |
844 | if(l >= 3) |
845 | return 0; | |
846 | } else { | |
847 | /* TUR succeeded */ | |
848 | break; | |
849 | } | |
850 | } | |
851 | ||
33aa687d JB |
852 | result = spi_execute(sdev, spi_read_buffer_descriptor, |
853 | DMA_FROM_DEVICE, buffer, 4, NULL); | |
1da177e4 | 854 | |
33aa687d | 855 | if (result) |
1da177e4 LT |
856 | /* Device has no echo buffer */ |
857 | return 0; | |
858 | ||
859 | return buffer[3] + ((buffer[2] & 0x1f) << 8); | |
860 | } | |
861 | ||
862 | static void | |
33aa687d | 863 | spi_dv_device_internal(struct scsi_device *sdev, u8 *buffer) |
1da177e4 | 864 | { |
33aa687d | 865 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
62a86129 | 866 | struct scsi_target *starget = sdev->sdev_target; |
60eef257 | 867 | struct Scsi_Host *shost = sdev->host; |
1da177e4 | 868 | int len = sdev->inquiry_len; |
2302827c JB |
869 | int min_period = spi_min_period(starget); |
870 | int max_width = spi_max_width(starget); | |
1da177e4 LT |
871 | /* first set us up for narrow async */ |
872 | DV_SET(offset, 0); | |
873 | DV_SET(width, 0); | |
2302827c | 874 | |
33aa687d | 875 | if (spi_dv_device_compare_inquiry(sdev, buffer, buffer, DV_LOOPS) |
1da177e4 | 876 | != SPI_COMPARE_SUCCESS) { |
9ccfc756 | 877 | starget_printk(KERN_ERR, starget, "Domain Validation Initial Inquiry Failed\n"); |
1da177e4 LT |
878 | /* FIXME: should probably offline the device here? */ |
879 | return; | |
880 | } | |
881 | ||
9872b81c | 882 | if (!spi_support_wide(starget)) { |
2302827c JB |
883 | spi_max_width(starget) = 0; |
884 | max_width = 0; | |
885 | } | |
886 | ||
1da177e4 | 887 | /* test width */ |
2302827c | 888 | if (i->f->set_width && max_width) { |
9a8bc9b8 | 889 | i->f->set_width(starget, 1); |
62a86129 | 890 | |
33aa687d | 891 | if (spi_dv_device_compare_inquiry(sdev, buffer, |
1da177e4 LT |
892 | buffer + len, |
893 | DV_LOOPS) | |
894 | != SPI_COMPARE_SUCCESS) { | |
9ccfc756 | 895 | starget_printk(KERN_ERR, starget, "Wide Transfers Fail\n"); |
9a8bc9b8 | 896 | i->f->set_width(starget, 0); |
2302827c JB |
897 | /* Make sure we don't force wide back on by asking |
898 | * for a transfer period that requires it */ | |
899 | max_width = 0; | |
900 | if (min_period < 10) | |
901 | min_period = 10; | |
1da177e4 LT |
902 | } |
903 | } | |
904 | ||
905 | if (!i->f->set_period) | |
906 | return; | |
907 | ||
908 | /* device can't handle synchronous */ | |
9872b81c | 909 | if (!spi_support_sync(starget) && !spi_support_dt(starget)) |
1da177e4 LT |
910 | return; |
911 | ||
349cd7cf JB |
912 | /* len == -1 is the signal that we need to ascertain the |
913 | * presence of an echo buffer before trying to use it. len == | |
914 | * 0 means we don't have an echo buffer */ | |
915 | len = -1; | |
1da177e4 LT |
916 | |
917 | retry: | |
918 | ||
919 | /* now set up to the maximum */ | |
62a86129 | 920 | DV_SET(offset, spi_max_offset(starget)); |
2302827c JB |
921 | DV_SET(period, min_period); |
922 | ||
9a8bc9b8 JB |
923 | /* try QAS requests; this should be harmless to set if the |
924 | * target supports it */ | |
9872b81c | 925 | if (spi_support_qas(starget) && spi_max_qas(starget)) { |
eb1dd68b | 926 | DV_SET(qas, 1); |
dfdc58ba JB |
927 | } else { |
928 | DV_SET(qas, 0); | |
929 | } | |
930 | ||
9872b81c JB |
931 | if (spi_support_ius(starget) && spi_max_iu(starget) && |
932 | min_period < 9) { | |
dfdc58ba | 933 | /* This u320 (or u640). Set IU transfers */ |
eb1dd68b | 934 | DV_SET(iu, 1); |
dfdc58ba | 935 | /* Then set the optional parameters */ |
9a8bc9b8 JB |
936 | DV_SET(rd_strm, 1); |
937 | DV_SET(wr_flow, 1); | |
938 | DV_SET(rti, 1); | |
2302827c | 939 | if (min_period == 8) |
9a8bc9b8 | 940 | DV_SET(pcomp_en, 1); |
dfdc58ba JB |
941 | } else { |
942 | DV_SET(iu, 0); | |
9a8bc9b8 | 943 | } |
dfdc58ba | 944 | |
60eef257 JB |
945 | /* now that we've done all this, actually check the bus |
946 | * signal type (if known). Some devices are stupid on | |
947 | * a SE bus and still claim they can try LVD only settings */ | |
948 | if (i->f->get_signalling) | |
949 | i->f->get_signalling(shost); | |
950 | if (spi_signalling(shost) == SPI_SIGNAL_SE || | |
dfdc58ba | 951 | spi_signalling(shost) == SPI_SIGNAL_HVD || |
9872b81c | 952 | !spi_support_dt(starget)) { |
60eef257 | 953 | DV_SET(dt, 0); |
dfdc58ba JB |
954 | } else { |
955 | DV_SET(dt, 1); | |
956 | } | |
2302827c JB |
957 | /* set width last because it will pull all the other |
958 | * parameters down to required values */ | |
959 | DV_SET(width, max_width); | |
960 | ||
349cd7cf JB |
961 | /* Do the read only INQUIRY tests */ |
962 | spi_dv_retrain(sdev, buffer, buffer + sdev->inquiry_len, | |
963 | spi_dv_device_compare_inquiry); | |
964 | /* See if we actually managed to negotiate and sustain DT */ | |
965 | if (i->f->get_dt) | |
966 | i->f->get_dt(starget); | |
967 | ||
968 | /* see if the device has an echo buffer. If it does we can do | |
969 | * the SPI pattern write tests. Because of some broken | |
970 | * devices, we *only* try this on a device that has actually | |
971 | * negotiated DT */ | |
972 | ||
973 | if (len == -1 && spi_dt(starget)) | |
974 | len = spi_dv_device_get_echo_buffer(sdev, buffer); | |
1da177e4 | 975 | |
349cd7cf | 976 | if (len <= 0) { |
9ccfc756 | 977 | starget_printk(KERN_INFO, starget, "Domain Validation skipping write tests\n"); |
1da177e4 LT |
978 | return; |
979 | } | |
980 | ||
981 | if (len > SPI_MAX_ECHO_BUFFER_SIZE) { | |
9ccfc756 | 982 | starget_printk(KERN_WARNING, starget, "Echo buffer size %d is too big, trimming to %d\n", len, SPI_MAX_ECHO_BUFFER_SIZE); |
1da177e4 LT |
983 | len = SPI_MAX_ECHO_BUFFER_SIZE; |
984 | } | |
985 | ||
33aa687d | 986 | if (spi_dv_retrain(sdev, buffer, buffer + len, |
1da177e4 LT |
987 | spi_dv_device_echo_buffer) |
988 | == SPI_COMPARE_SKIP_TEST) { | |
989 | /* OK, the stupid drive can't do a write echo buffer | |
990 | * test after all, fall back to the read tests */ | |
991 | len = 0; | |
992 | goto retry; | |
993 | } | |
994 | } | |
995 | ||
996 | ||
997 | /** spi_dv_device - Do Domain Validation on the device | |
998 | * @sdev: scsi device to validate | |
999 | * | |
1000 | * Performs the domain validation on the given device in the | |
1001 | * current execution thread. Since DV operations may sleep, | |
1002 | * the current thread must have user context. Also no SCSI | |
1003 | * related locks that would deadlock I/O issued by the DV may | |
1004 | * be held. | |
1005 | */ | |
1006 | void | |
1007 | spi_dv_device(struct scsi_device *sdev) | |
1008 | { | |
1da177e4 LT |
1009 | struct scsi_target *starget = sdev->sdev_target; |
1010 | u8 *buffer; | |
1011 | const int len = SPI_MAX_ECHO_BUFFER_SIZE*2; | |
1012 | ||
203f8c25 BVA |
1013 | /* |
1014 | * Because this function and the power management code both call | |
1015 | * scsi_device_quiesce(), it is not safe to perform domain validation | |
1016 | * while suspend or resume is in progress. Hence the | |
1017 | * lock/unlock_system_sleep() calls. | |
1018 | */ | |
1019 | lock_system_sleep(); | |
1020 | ||
89a342ca | 1021 | if (unlikely(spi_dv_in_progress(starget))) |
203f8c25 | 1022 | goto unlock; |
1da177e4 | 1023 | |
89a342ca | 1024 | if (unlikely(scsi_device_get(sdev))) |
203f8c25 BVA |
1025 | goto unlock; |
1026 | ||
dfdc58ba JB |
1027 | spi_dv_in_progress(starget) = 1; |
1028 | ||
24669f75 | 1029 | buffer = kzalloc(len, GFP_KERNEL); |
1da177e4 LT |
1030 | |
1031 | if (unlikely(!buffer)) | |
1032 | goto out_put; | |
1033 | ||
1da177e4 LT |
1034 | /* We need to verify that the actual device will quiesce; the |
1035 | * later target quiesce is just a nice to have */ | |
1036 | if (unlikely(scsi_device_quiesce(sdev))) | |
1037 | goto out_free; | |
1038 | ||
1039 | scsi_target_quiesce(starget); | |
1040 | ||
1041 | spi_dv_pending(starget) = 1; | |
d158d261 | 1042 | mutex_lock(&spi_dv_mutex(starget)); |
1da177e4 | 1043 | |
9ccfc756 | 1044 | starget_printk(KERN_INFO, starget, "Beginning Domain Validation\n"); |
1da177e4 | 1045 | |
33aa687d | 1046 | spi_dv_device_internal(sdev, buffer); |
1da177e4 | 1047 | |
9ccfc756 | 1048 | starget_printk(KERN_INFO, starget, "Ending Domain Validation\n"); |
1da177e4 | 1049 | |
d158d261 | 1050 | mutex_unlock(&spi_dv_mutex(starget)); |
1da177e4 LT |
1051 | spi_dv_pending(starget) = 0; |
1052 | ||
1053 | scsi_target_resume(starget); | |
1054 | ||
1055 | spi_initial_dv(starget) = 1; | |
1056 | ||
1057 | out_free: | |
1058 | kfree(buffer); | |
1059 | out_put: | |
dfdc58ba | 1060 | spi_dv_in_progress(starget) = 0; |
1da177e4 | 1061 | scsi_device_put(sdev); |
203f8c25 BVA |
1062 | unlock: |
1063 | unlock_system_sleep(); | |
1da177e4 LT |
1064 | } |
1065 | EXPORT_SYMBOL(spi_dv_device); | |
1066 | ||
1067 | struct work_queue_wrapper { | |
1068 | struct work_struct work; | |
1069 | struct scsi_device *sdev; | |
1070 | }; | |
1071 | ||
1072 | static void | |
c4028958 | 1073 | spi_dv_device_work_wrapper(struct work_struct *work) |
1da177e4 | 1074 | { |
c4028958 DH |
1075 | struct work_queue_wrapper *wqw = |
1076 | container_of(work, struct work_queue_wrapper, work); | |
1da177e4 LT |
1077 | struct scsi_device *sdev = wqw->sdev; |
1078 | ||
1079 | kfree(wqw); | |
1080 | spi_dv_device(sdev); | |
1081 | spi_dv_pending(sdev->sdev_target) = 0; | |
1082 | scsi_device_put(sdev); | |
1083 | } | |
1084 | ||
1085 | ||
1086 | /** | |
1087 | * spi_schedule_dv_device - schedule domain validation to occur on the device | |
1088 | * @sdev: The device to validate | |
1089 | * | |
1090 | * Identical to spi_dv_device() above, except that the DV will be | |
1091 | * scheduled to occur in a workqueue later. All memory allocations | |
1092 | * are atomic, so may be called from any context including those holding | |
1093 | * SCSI locks. | |
1094 | */ | |
1095 | void | |
1096 | spi_schedule_dv_device(struct scsi_device *sdev) | |
1097 | { | |
1098 | struct work_queue_wrapper *wqw = | |
1099 | kmalloc(sizeof(struct work_queue_wrapper), GFP_ATOMIC); | |
1100 | ||
1101 | if (unlikely(!wqw)) | |
1102 | return; | |
1103 | ||
1104 | if (unlikely(spi_dv_pending(sdev->sdev_target))) { | |
1105 | kfree(wqw); | |
1106 | return; | |
1107 | } | |
1108 | /* Set pending early (dv_device doesn't check it, only sets it) */ | |
1109 | spi_dv_pending(sdev->sdev_target) = 1; | |
1110 | if (unlikely(scsi_device_get(sdev))) { | |
1111 | kfree(wqw); | |
1112 | spi_dv_pending(sdev->sdev_target) = 0; | |
1113 | return; | |
1114 | } | |
1115 | ||
c4028958 | 1116 | INIT_WORK(&wqw->work, spi_dv_device_work_wrapper); |
1da177e4 LT |
1117 | wqw->sdev = sdev; |
1118 | ||
1119 | schedule_work(&wqw->work); | |
1120 | } | |
1121 | EXPORT_SYMBOL(spi_schedule_dv_device); | |
1122 | ||
1123 | /** | |
1124 | * spi_display_xfer_agreement - Print the current target transfer agreement | |
1125 | * @starget: The target for which to display the agreement | |
1126 | * | |
1127 | * Each SPI port is required to maintain a transfer agreement for each | |
1128 | * other port on the bus. This function prints a one-line summary of | |
1129 | * the current agreement; more detailed information is available in sysfs. | |
1130 | */ | |
1131 | void spi_display_xfer_agreement(struct scsi_target *starget) | |
1132 | { | |
1133 | struct spi_transport_attrs *tp; | |
1134 | tp = (struct spi_transport_attrs *)&starget->starget_data; | |
1135 | ||
1136 | if (tp->offset > 0 && tp->period > 0) { | |
1137 | unsigned int picosec, kb100; | |
1138 | char *scsi = "FAST-?"; | |
1139 | char tmp[8]; | |
1140 | ||
1141 | if (tp->period <= SPI_STATIC_PPR) { | |
1142 | picosec = ppr_to_ps[tp->period]; | |
1143 | switch (tp->period) { | |
1144 | case 7: scsi = "FAST-320"; break; | |
1145 | case 8: scsi = "FAST-160"; break; | |
1146 | case 9: scsi = "FAST-80"; break; | |
1147 | case 10: | |
1148 | case 11: scsi = "FAST-40"; break; | |
1149 | case 12: scsi = "FAST-20"; break; | |
1150 | } | |
1151 | } else { | |
1152 | picosec = tp->period * 4000; | |
1153 | if (tp->period < 25) | |
1154 | scsi = "FAST-20"; | |
1155 | else if (tp->period < 50) | |
1156 | scsi = "FAST-10"; | |
1157 | else | |
1158 | scsi = "FAST-5"; | |
1159 | } | |
1160 | ||
1161 | kb100 = (10000000 + picosec / 2) / picosec; | |
1162 | if (tp->width) | |
1163 | kb100 *= 2; | |
1164 | sprint_frac(tmp, picosec, 1000); | |
1165 | ||
1166 | dev_info(&starget->dev, | |
d872ebe4 JB |
1167 | "%s %sSCSI %d.%d MB/s %s%s%s%s%s%s%s%s (%s ns, offset %d)\n", |
1168 | scsi, tp->width ? "WIDE " : "", kb100/10, kb100 % 10, | |
1169 | tp->dt ? "DT" : "ST", | |
1170 | tp->iu ? " IU" : "", | |
1171 | tp->qas ? " QAS" : "", | |
1172 | tp->rd_strm ? " RDSTRM" : "", | |
1173 | tp->rti ? " RTI" : "", | |
1174 | tp->wr_flow ? " WRFLOW" : "", | |
1175 | tp->pcomp_en ? " PCOMP" : "", | |
1176 | tp->hold_mcs ? " HMCS" : "", | |
1177 | tmp, tp->offset); | |
1da177e4 | 1178 | } else { |
493ff4ee | 1179 | dev_info(&starget->dev, "%sasynchronous\n", |
1da177e4 LT |
1180 | tp->width ? "wide " : ""); |
1181 | } | |
1182 | } | |
1183 | EXPORT_SYMBOL(spi_display_xfer_agreement); | |
1184 | ||
6ea3c0b2 MW |
1185 | int spi_populate_width_msg(unsigned char *msg, int width) |
1186 | { | |
1187 | msg[0] = EXTENDED_MESSAGE; | |
1188 | msg[1] = 2; | |
1189 | msg[2] = EXTENDED_WDTR; | |
1190 | msg[3] = width; | |
1191 | return 4; | |
1192 | } | |
38e14f89 | 1193 | EXPORT_SYMBOL_GPL(spi_populate_width_msg); |
6ea3c0b2 MW |
1194 | |
1195 | int spi_populate_sync_msg(unsigned char *msg, int period, int offset) | |
1196 | { | |
1197 | msg[0] = EXTENDED_MESSAGE; | |
1198 | msg[1] = 3; | |
1199 | msg[2] = EXTENDED_SDTR; | |
1200 | msg[3] = period; | |
1201 | msg[4] = offset; | |
1202 | return 5; | |
1203 | } | |
38e14f89 | 1204 | EXPORT_SYMBOL_GPL(spi_populate_sync_msg); |
6ea3c0b2 MW |
1205 | |
1206 | int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, | |
1207 | int width, int options) | |
1208 | { | |
1209 | msg[0] = EXTENDED_MESSAGE; | |
1210 | msg[1] = 6; | |
1211 | msg[2] = EXTENDED_PPR; | |
1212 | msg[3] = period; | |
1213 | msg[4] = 0; | |
1214 | msg[5] = offset; | |
1215 | msg[6] = width; | |
1216 | msg[7] = options; | |
1217 | return 8; | |
1218 | } | |
38e14f89 | 1219 | EXPORT_SYMBOL_GPL(spi_populate_ppr_msg); |
6ea3c0b2 | 1220 | |
50668633 CH |
1221 | /** |
1222 | * spi_populate_tag_msg - place a tag message in a buffer | |
1223 | * @msg: pointer to the area to place the tag | |
1224 | * @cmd: pointer to the scsi command for the tag | |
1225 | * | |
1226 | * Notes: | |
1227 | * designed to create the correct type of tag message for the | |
1228 | * particular request. Returns the size of the tag message. | |
1229 | * May return 0 if TCQ is disabled for this device. | |
1230 | **/ | |
1231 | int spi_populate_tag_msg(unsigned char *msg, struct scsi_cmnd *cmd) | |
1232 | { | |
1233 | if (cmd->flags & SCMD_TAGGED) { | |
68d81f40 | 1234 | *msg++ = SIMPLE_QUEUE_TAG; |
50668633 CH |
1235 | *msg++ = cmd->request->tag; |
1236 | return 2; | |
1237 | } | |
1238 | ||
1239 | return 0; | |
1240 | } | |
1241 | EXPORT_SYMBOL_GPL(spi_populate_tag_msg); | |
1242 | ||
410ca5c7 MW |
1243 | #ifdef CONFIG_SCSI_CONSTANTS |
1244 | static const char * const one_byte_msgs[] = { | |
72df0ebf | 1245 | /* 0x00 */ "Task Complete", NULL /* Extended Message */, "Save Pointers", |
410ca5c7 | 1246 | /* 0x03 */ "Restore Pointers", "Disconnect", "Initiator Error", |
72df0ebf | 1247 | /* 0x06 */ "Abort Task Set", "Message Reject", "Nop", "Message Parity Error", |
410ca5c7 | 1248 | /* 0x0a */ "Linked Command Complete", "Linked Command Complete w/flag", |
72df0ebf MW |
1249 | /* 0x0c */ "Target Reset", "Abort Task", "Clear Task Set", |
1250 | /* 0x0f */ "Initiate Recovery", "Release Recovery", | |
1251 | /* 0x11 */ "Terminate Process", "Continue Task", "Target Transfer Disable", | |
1252 | /* 0x14 */ NULL, NULL, "Clear ACA", "LUN Reset" | |
410ca5c7 | 1253 | }; |
410ca5c7 MW |
1254 | |
1255 | static const char * const two_byte_msgs[] = { | |
47972153 | 1256 | /* 0x20 */ "Simple Queue Tag", "Head of Queue Tag", "Ordered Queue Tag", |
72df0ebf | 1257 | /* 0x23 */ "Ignore Wide Residue", "ACA" |
410ca5c7 | 1258 | }; |
410ca5c7 MW |
1259 | |
1260 | static const char * const extended_msgs[] = { | |
1261 | /* 0x00 */ "Modify Data Pointer", "Synchronous Data Transfer Request", | |
ef72582e | 1262 | /* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request", |
fc25307d | 1263 | /* 0x04 */ "Parallel Protocol Request", "Modify Bidirectional Data Pointer" |
410ca5c7 | 1264 | }; |
410ca5c7 | 1265 | |
bdd70f2c | 1266 | static void print_nego(const unsigned char *msg, int per, int off, int width) |
ef72582e MW |
1267 | { |
1268 | if (per) { | |
1269 | char buf[20]; | |
1270 | period_to_str(buf, msg[per]); | |
1271 | printk("period = %s ns ", buf); | |
1272 | } | |
1273 | ||
1274 | if (off) | |
1275 | printk("offset = %d ", msg[off]); | |
1276 | if (width) | |
1277 | printk("width = %d ", 8 << msg[width]); | |
1278 | } | |
410ca5c7 | 1279 | |
fc25307d MW |
1280 | static void print_ptr(const unsigned char *msg, int msb, const char *desc) |
1281 | { | |
1282 | int ptr = (msg[msb] << 24) | (msg[msb+1] << 16) | (msg[msb+2] << 8) | | |
1283 | msg[msb+3]; | |
1284 | printk("%s = %d ", desc, ptr); | |
1285 | } | |
1286 | ||
1abfd370 | 1287 | int spi_print_msg(const unsigned char *msg) |
410ca5c7 | 1288 | { |
72df0ebf | 1289 | int len = 1, i; |
410ca5c7 | 1290 | if (msg[0] == EXTENDED_MESSAGE) { |
fc25307d MW |
1291 | len = 2 + msg[1]; |
1292 | if (len == 2) | |
1293 | len += 256; | |
b32aaffc | 1294 | if (msg[2] < ARRAY_SIZE(extended_msgs)) |
410ca5c7 MW |
1295 | printk ("%s ", extended_msgs[msg[2]]); |
1296 | else | |
1297 | printk ("Extended Message, reserved code (0x%02x) ", | |
1298 | (int) msg[2]); | |
1299 | switch (msg[2]) { | |
1300 | case EXTENDED_MODIFY_DATA_POINTER: | |
fc25307d | 1301 | print_ptr(msg, 3, "pointer"); |
410ca5c7 MW |
1302 | break; |
1303 | case EXTENDED_SDTR: | |
ef72582e | 1304 | print_nego(msg, 3, 4, 0); |
410ca5c7 MW |
1305 | break; |
1306 | case EXTENDED_WDTR: | |
ef72582e MW |
1307 | print_nego(msg, 0, 0, 3); |
1308 | break; | |
1309 | case EXTENDED_PPR: | |
1310 | print_nego(msg, 3, 5, 6); | |
410ca5c7 | 1311 | break; |
fc25307d MW |
1312 | case EXTENDED_MODIFY_BIDI_DATA_PTR: |
1313 | print_ptr(msg, 3, "out"); | |
1314 | print_ptr(msg, 7, "in"); | |
1315 | break; | |
410ca5c7 MW |
1316 | default: |
1317 | for (i = 2; i < len; ++i) | |
1318 | printk("%02x ", msg[i]); | |
1319 | } | |
1320 | /* Identify */ | |
1321 | } else if (msg[0] & 0x80) { | |
1322 | printk("Identify disconnect %sallowed %s %d ", | |
1323 | (msg[0] & 0x40) ? "" : "not ", | |
1324 | (msg[0] & 0x20) ? "target routine" : "lun", | |
1325 | msg[0] & 0x7); | |
410ca5c7 MW |
1326 | /* Normal One byte */ |
1327 | } else if (msg[0] < 0x1f) { | |
72df0ebf | 1328 | if (msg[0] < ARRAY_SIZE(one_byte_msgs) && one_byte_msgs[msg[0]]) |
e24d873d | 1329 | printk("%s ", one_byte_msgs[msg[0]]); |
410ca5c7 MW |
1330 | else |
1331 | printk("reserved (%02x) ", msg[0]); | |
72df0ebf MW |
1332 | } else if (msg[0] == 0x55) { |
1333 | printk("QAS Request "); | |
410ca5c7 MW |
1334 | /* Two byte */ |
1335 | } else if (msg[0] <= 0x2f) { | |
b32aaffc | 1336 | if ((msg[0] - 0x20) < ARRAY_SIZE(two_byte_msgs)) |
410ca5c7 MW |
1337 | printk("%s %02x ", two_byte_msgs[msg[0] - 0x20], |
1338 | msg[1]); | |
1339 | else | |
1340 | printk("reserved two byte (%02x %02x) ", | |
1341 | msg[0], msg[1]); | |
1342 | len = 2; | |
1343 | } else | |
e24d873d | 1344 | printk("reserved "); |
410ca5c7 MW |
1345 | return len; |
1346 | } | |
1abfd370 | 1347 | EXPORT_SYMBOL(spi_print_msg); |
410ca5c7 MW |
1348 | |
1349 | #else /* ifndef CONFIG_SCSI_CONSTANTS */ | |
1350 | ||
1abfd370 | 1351 | int spi_print_msg(const unsigned char *msg) |
410ca5c7 | 1352 | { |
72df0ebf | 1353 | int len = 1, i; |
410ca5c7 MW |
1354 | |
1355 | if (msg[0] == EXTENDED_MESSAGE) { | |
fc25307d MW |
1356 | len = 2 + msg[1]; |
1357 | if (len == 2) | |
1358 | len += 256; | |
410ca5c7 MW |
1359 | for (i = 0; i < len; ++i) |
1360 | printk("%02x ", msg[i]); | |
1361 | /* Identify */ | |
1362 | } else if (msg[0] & 0x80) { | |
1363 | printk("%02x ", msg[0]); | |
410ca5c7 | 1364 | /* Normal One byte */ |
597705aa | 1365 | } else if ((msg[0] < 0x1f) || (msg[0] == 0x55)) { |
410ca5c7 | 1366 | printk("%02x ", msg[0]); |
410ca5c7 MW |
1367 | /* Two byte */ |
1368 | } else if (msg[0] <= 0x2f) { | |
1369 | printk("%02x %02x", msg[0], msg[1]); | |
1370 | len = 2; | |
1371 | } else | |
1372 | printk("%02x ", msg[0]); | |
1373 | return len; | |
1374 | } | |
1abfd370 | 1375 | EXPORT_SYMBOL(spi_print_msg); |
410ca5c7 MW |
1376 | #endif /* ! CONFIG_SCSI_CONSTANTS */ |
1377 | ||
1da177e4 LT |
1378 | static int spi_device_match(struct attribute_container *cont, |
1379 | struct device *dev) | |
1380 | { | |
1381 | struct scsi_device *sdev; | |
1382 | struct Scsi_Host *shost; | |
10c1b889 | 1383 | struct spi_internal *i; |
1da177e4 LT |
1384 | |
1385 | if (!scsi_is_sdev_device(dev)) | |
1386 | return 0; | |
1387 | ||
1388 | sdev = to_scsi_device(dev); | |
1389 | shost = sdev->host; | |
1390 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1391 | != &spi_host_class.class) | |
1392 | return 0; | |
1393 | /* Note: this class has no device attributes, so it has | |
1394 | * no per-HBA allocation and thus we don't need to distinguish | |
1395 | * the attribute containers for the device */ | |
10c1b889 JB |
1396 | i = to_spi_internal(shost->transportt); |
1397 | if (i->f->deny_binding && i->f->deny_binding(sdev->sdev_target)) | |
1398 | return 0; | |
1da177e4 LT |
1399 | return 1; |
1400 | } | |
1401 | ||
1402 | static int spi_target_match(struct attribute_container *cont, | |
1403 | struct device *dev) | |
1404 | { | |
1405 | struct Scsi_Host *shost; | |
10c1b889 | 1406 | struct scsi_target *starget; |
1da177e4 LT |
1407 | struct spi_internal *i; |
1408 | ||
1409 | if (!scsi_is_target_device(dev)) | |
1410 | return 0; | |
1411 | ||
1412 | shost = dev_to_shost(dev->parent); | |
1413 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1414 | != &spi_host_class.class) | |
1415 | return 0; | |
1416 | ||
1417 | i = to_spi_internal(shost->transportt); | |
10c1b889 JB |
1418 | starget = to_scsi_target(dev); |
1419 | ||
1420 | if (i->f->deny_binding && i->f->deny_binding(starget)) | |
1421 | return 0; | |
1422 | ||
1da177e4 LT |
1423 | return &i->t.target_attrs.ac == cont; |
1424 | } | |
1425 | ||
1426 | static DECLARE_TRANSPORT_CLASS(spi_transport_class, | |
1427 | "spi_transport", | |
1428 | spi_setup_transport_attrs, | |
1429 | NULL, | |
9b161a4d | 1430 | spi_target_configure); |
1da177e4 LT |
1431 | |
1432 | static DECLARE_ANON_TRANSPORT_CLASS(spi_device_class, | |
1433 | spi_device_match, | |
1434 | spi_device_configure); | |
1435 | ||
9b161a4d | 1436 | static struct attribute *host_attributes[] = { |
ee959b00 | 1437 | &dev_attr_signalling.attr, |
0ac2377b HR |
1438 | &dev_attr_host_width.attr, |
1439 | &dev_attr_hba_id.attr, | |
9b161a4d JB |
1440 | NULL |
1441 | }; | |
1442 | ||
1443 | static struct attribute_group host_attribute_group = { | |
1444 | .attrs = host_attributes, | |
1445 | }; | |
1446 | ||
1447 | static int spi_host_configure(struct transport_container *tc, | |
1448 | struct device *dev, | |
ee959b00 | 1449 | struct device *cdev) |
9b161a4d JB |
1450 | { |
1451 | struct kobject *kobj = &cdev->kobj; | |
1452 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1453 | struct spi_internal *si = to_spi_internal(shost->transportt); | |
ee959b00 | 1454 | struct attribute *attr = &dev_attr_signalling.attr; |
9b161a4d JB |
1455 | int rc = 0; |
1456 | ||
1457 | if (si->f->set_signalling) | |
1458 | rc = sysfs_chmod_file(kobj, attr, attr->mode | S_IWUSR); | |
1459 | ||
1460 | return rc; | |
1461 | } | |
1462 | ||
1463 | /* returns true if we should be showing the variable. Also | |
1464 | * overloads the return by setting 1<<1 if the attribute should | |
1465 | * be writeable */ | |
1466 | #define TARGET_ATTRIBUTE_HELPER(name) \ | |
352f6bb4 JB |
1467 | (si->f->show_##name ? S_IRUGO : 0) | \ |
1468 | (si->f->set_##name ? S_IWUSR : 0) | |
9b161a4d | 1469 | |
587a1f16 | 1470 | static umode_t target_attribute_is_visible(struct kobject *kobj, |
352f6bb4 | 1471 | struct attribute *attr, int i) |
9b161a4d | 1472 | { |
ee959b00 | 1473 | struct device *cdev = container_of(kobj, struct device, kobj); |
9b161a4d JB |
1474 | struct scsi_target *starget = transport_class_to_starget(cdev); |
1475 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1476 | struct spi_internal *si = to_spi_internal(shost->transportt); | |
1477 | ||
ee959b00 | 1478 | if (attr == &dev_attr_period.attr && |
9b161a4d JB |
1479 | spi_support_sync(starget)) |
1480 | return TARGET_ATTRIBUTE_HELPER(period); | |
ee959b00 | 1481 | else if (attr == &dev_attr_min_period.attr && |
9b161a4d JB |
1482 | spi_support_sync(starget)) |
1483 | return TARGET_ATTRIBUTE_HELPER(period); | |
ee959b00 | 1484 | else if (attr == &dev_attr_offset.attr && |
9b161a4d JB |
1485 | spi_support_sync(starget)) |
1486 | return TARGET_ATTRIBUTE_HELPER(offset); | |
ee959b00 | 1487 | else if (attr == &dev_attr_max_offset.attr && |
9b161a4d JB |
1488 | spi_support_sync(starget)) |
1489 | return TARGET_ATTRIBUTE_HELPER(offset); | |
ee959b00 | 1490 | else if (attr == &dev_attr_width.attr && |
9b161a4d JB |
1491 | spi_support_wide(starget)) |
1492 | return TARGET_ATTRIBUTE_HELPER(width); | |
ee959b00 | 1493 | else if (attr == &dev_attr_max_width.attr && |
9b161a4d JB |
1494 | spi_support_wide(starget)) |
1495 | return TARGET_ATTRIBUTE_HELPER(width); | |
ee959b00 | 1496 | else if (attr == &dev_attr_iu.attr && |
9b161a4d JB |
1497 | spi_support_ius(starget)) |
1498 | return TARGET_ATTRIBUTE_HELPER(iu); | |
ea443190 JB |
1499 | else if (attr == &dev_attr_max_iu.attr && |
1500 | spi_support_ius(starget)) | |
1501 | return TARGET_ATTRIBUTE_HELPER(iu); | |
ee959b00 | 1502 | else if (attr == &dev_attr_dt.attr && |
9b161a4d JB |
1503 | spi_support_dt(starget)) |
1504 | return TARGET_ATTRIBUTE_HELPER(dt); | |
ee959b00 | 1505 | else if (attr == &dev_attr_qas.attr && |
9b161a4d JB |
1506 | spi_support_qas(starget)) |
1507 | return TARGET_ATTRIBUTE_HELPER(qas); | |
ea443190 JB |
1508 | else if (attr == &dev_attr_max_qas.attr && |
1509 | spi_support_qas(starget)) | |
1510 | return TARGET_ATTRIBUTE_HELPER(qas); | |
ee959b00 | 1511 | else if (attr == &dev_attr_wr_flow.attr && |
9b161a4d JB |
1512 | spi_support_ius(starget)) |
1513 | return TARGET_ATTRIBUTE_HELPER(wr_flow); | |
ee959b00 | 1514 | else if (attr == &dev_attr_rd_strm.attr && |
9b161a4d JB |
1515 | spi_support_ius(starget)) |
1516 | return TARGET_ATTRIBUTE_HELPER(rd_strm); | |
ee959b00 | 1517 | else if (attr == &dev_attr_rti.attr && |
9b161a4d JB |
1518 | spi_support_ius(starget)) |
1519 | return TARGET_ATTRIBUTE_HELPER(rti); | |
ee959b00 | 1520 | else if (attr == &dev_attr_pcomp_en.attr && |
9b161a4d JB |
1521 | spi_support_ius(starget)) |
1522 | return TARGET_ATTRIBUTE_HELPER(pcomp_en); | |
ee959b00 | 1523 | else if (attr == &dev_attr_hold_mcs.attr && |
9b161a4d JB |
1524 | spi_support_ius(starget)) |
1525 | return TARGET_ATTRIBUTE_HELPER(hold_mcs); | |
ee959b00 | 1526 | else if (attr == &dev_attr_revalidate.attr) |
352f6bb4 | 1527 | return S_IWUSR; |
9b161a4d JB |
1528 | |
1529 | return 0; | |
1530 | } | |
1531 | ||
1532 | static struct attribute *target_attributes[] = { | |
ee959b00 TJ |
1533 | &dev_attr_period.attr, |
1534 | &dev_attr_min_period.attr, | |
1535 | &dev_attr_offset.attr, | |
1536 | &dev_attr_max_offset.attr, | |
1537 | &dev_attr_width.attr, | |
1538 | &dev_attr_max_width.attr, | |
1539 | &dev_attr_iu.attr, | |
ea443190 | 1540 | &dev_attr_max_iu.attr, |
ee959b00 TJ |
1541 | &dev_attr_dt.attr, |
1542 | &dev_attr_qas.attr, | |
ea443190 | 1543 | &dev_attr_max_qas.attr, |
ee959b00 TJ |
1544 | &dev_attr_wr_flow.attr, |
1545 | &dev_attr_rd_strm.attr, | |
1546 | &dev_attr_rti.attr, | |
1547 | &dev_attr_pcomp_en.attr, | |
1548 | &dev_attr_hold_mcs.attr, | |
1549 | &dev_attr_revalidate.attr, | |
9b161a4d JB |
1550 | NULL |
1551 | }; | |
1552 | ||
1553 | static struct attribute_group target_attribute_group = { | |
1554 | .attrs = target_attributes, | |
1555 | .is_visible = target_attribute_is_visible, | |
1556 | }; | |
1557 | ||
1558 | static int spi_target_configure(struct transport_container *tc, | |
1559 | struct device *dev, | |
ee959b00 | 1560 | struct device *cdev) |
9b161a4d JB |
1561 | { |
1562 | struct kobject *kobj = &cdev->kobj; | |
352f6bb4 JB |
1563 | |
1564 | /* force an update based on parameters read from the device */ | |
1565 | sysfs_update_group(kobj, &target_attribute_group); | |
9b161a4d JB |
1566 | |
1567 | return 0; | |
1568 | } | |
1569 | ||
1da177e4 LT |
1570 | struct scsi_transport_template * |
1571 | spi_attach_transport(struct spi_function_template *ft) | |
1572 | { | |
24669f75 JS |
1573 | struct spi_internal *i = kzalloc(sizeof(struct spi_internal), |
1574 | GFP_KERNEL); | |
1575 | ||
1da177e4 LT |
1576 | if (unlikely(!i)) |
1577 | return NULL; | |
1578 | ||
1da177e4 | 1579 | i->t.target_attrs.ac.class = &spi_transport_class.class; |
9b161a4d | 1580 | i->t.target_attrs.ac.grp = &target_attribute_group; |
1da177e4 LT |
1581 | i->t.target_attrs.ac.match = spi_target_match; |
1582 | transport_container_register(&i->t.target_attrs); | |
1583 | i->t.target_size = sizeof(struct spi_transport_attrs); | |
1584 | i->t.host_attrs.ac.class = &spi_host_class.class; | |
9b161a4d | 1585 | i->t.host_attrs.ac.grp = &host_attribute_group; |
1da177e4 LT |
1586 | i->t.host_attrs.ac.match = spi_host_match; |
1587 | transport_container_register(&i->t.host_attrs); | |
1588 | i->t.host_size = sizeof(struct spi_host_attrs); | |
1589 | i->f = ft; | |
1590 | ||
1da177e4 LT |
1591 | return &i->t; |
1592 | } | |
1593 | EXPORT_SYMBOL(spi_attach_transport); | |
1594 | ||
1595 | void spi_release_transport(struct scsi_transport_template *t) | |
1596 | { | |
1597 | struct spi_internal *i = to_spi_internal(t); | |
1598 | ||
1599 | transport_container_unregister(&i->t.target_attrs); | |
1600 | transport_container_unregister(&i->t.host_attrs); | |
1601 | ||
1602 | kfree(i); | |
1603 | } | |
1604 | EXPORT_SYMBOL(spi_release_transport); | |
1605 | ||
1606 | static __init int spi_transport_init(void) | |
1607 | { | |
a9e0edb6 JB |
1608 | int error = scsi_dev_info_add_list(SCSI_DEVINFO_SPI, |
1609 | "SCSI Parallel Transport Class"); | |
1610 | if (!error) { | |
1611 | int i; | |
1612 | ||
1613 | for (i = 0; spi_static_device_list[i].vendor; i++) | |
1614 | scsi_dev_info_list_add_keyed(1, /* compatible */ | |
1615 | spi_static_device_list[i].vendor, | |
1616 | spi_static_device_list[i].model, | |
1617 | NULL, | |
1618 | spi_static_device_list[i].flags, | |
1619 | SCSI_DEVINFO_SPI); | |
1620 | } | |
1621 | ||
1622 | error = transport_class_register(&spi_transport_class); | |
1da177e4 LT |
1623 | if (error) |
1624 | return error; | |
1625 | error = anon_transport_class_register(&spi_device_class); | |
1626 | return transport_class_register(&spi_host_class); | |
1627 | } | |
1628 | ||
1629 | static void __exit spi_transport_exit(void) | |
1630 | { | |
1631 | transport_class_unregister(&spi_transport_class); | |
1632 | anon_transport_class_unregister(&spi_device_class); | |
1633 | transport_class_unregister(&spi_host_class); | |
a9e0edb6 | 1634 | scsi_dev_info_remove_list(SCSI_DEVINFO_SPI); |
1da177e4 LT |
1635 | } |
1636 | ||
1637 | MODULE_AUTHOR("Martin Hicks"); | |
1638 | MODULE_DESCRIPTION("SPI Transport Attributes"); | |
1639 | MODULE_LICENSE("GPL"); | |
1640 | ||
1641 | module_init(spi_transport_init); | |
1642 | module_exit(spi_transport_exit); |