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]; | |
76aaf87b CH |
126 | struct scsi_sense_hdr sshdr_tmp; |
127 | ||
128 | if (!sshdr) | |
129 | sshdr = &sshdr_tmp; | |
949bf797 JB |
130 | |
131 | for(i = 0; i < DV_RETRIES; i++) { | |
76aaf87b CH |
132 | result = scsi_execute(sdev, cmd, dir, buffer, bufflen, sense, |
133 | sshdr, DV_TIMEOUT, /* retries */ 1, | |
6000a368 MC |
134 | REQ_FAILFAST_DEV | |
135 | REQ_FAILFAST_TRANSPORT | | |
f4f4e47e | 136 | REQ_FAILFAST_DRIVER, |
76aaf87b CH |
137 | 0, NULL); |
138 | if (!(driver_byte(result) & DRIVER_SENSE) || | |
139 | sshdr->sense_key != UNIT_ATTENTION) | |
140 | break; | |
949bf797 | 141 | } |
33aa687d | 142 | return result; |
949bf797 JB |
143 | } |
144 | ||
1da177e4 LT |
145 | static struct { |
146 | enum spi_signal_type value; | |
147 | char *name; | |
148 | } signal_types[] = { | |
149 | { SPI_SIGNAL_UNKNOWN, "unknown" }, | |
150 | { SPI_SIGNAL_SE, "SE" }, | |
151 | { SPI_SIGNAL_LVD, "LVD" }, | |
152 | { SPI_SIGNAL_HVD, "HVD" }, | |
153 | }; | |
154 | ||
155 | static inline const char *spi_signal_to_string(enum spi_signal_type type) | |
156 | { | |
157 | int i; | |
158 | ||
6391a113 | 159 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
1da177e4 LT |
160 | if (type == signal_types[i].value) |
161 | return signal_types[i].name; | |
162 | } | |
163 | return NULL; | |
164 | } | |
165 | static inline enum spi_signal_type spi_signal_to_value(const char *name) | |
166 | { | |
167 | int i, len; | |
168 | ||
6391a113 | 169 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
1da177e4 LT |
170 | len = strlen(signal_types[i].name); |
171 | if (strncmp(name, signal_types[i].name, len) == 0 && | |
172 | (name[len] == '\n' || name[len] == '\0')) | |
173 | return signal_types[i].value; | |
174 | } | |
175 | return SPI_SIGNAL_UNKNOWN; | |
176 | } | |
177 | ||
d0a7e574 | 178 | static int spi_host_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 179 | struct device *cdev) |
1da177e4 LT |
180 | { |
181 | struct Scsi_Host *shost = dev_to_shost(dev); | |
182 | ||
183 | spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
9b161a4d JB |
188 | static int spi_host_configure(struct transport_container *tc, |
189 | struct device *dev, | |
ee959b00 | 190 | struct device *cdev); |
9b161a4d | 191 | |
1da177e4 LT |
192 | static DECLARE_TRANSPORT_CLASS(spi_host_class, |
193 | "spi_host", | |
194 | spi_host_setup, | |
195 | NULL, | |
9b161a4d | 196 | spi_host_configure); |
1da177e4 LT |
197 | |
198 | static int spi_host_match(struct attribute_container *cont, | |
199 | struct device *dev) | |
200 | { | |
201 | struct Scsi_Host *shost; | |
1da177e4 LT |
202 | |
203 | if (!scsi_is_host_device(dev)) | |
204 | return 0; | |
205 | ||
206 | shost = dev_to_shost(dev); | |
207 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
208 | != &spi_host_class.class) | |
209 | return 0; | |
210 | ||
9b161a4d | 211 | return &shost->transportt->host_attrs.ac == cont; |
1da177e4 LT |
212 | } |
213 | ||
9b161a4d JB |
214 | static int spi_target_configure(struct transport_container *tc, |
215 | struct device *dev, | |
ee959b00 | 216 | struct device *cdev); |
9b161a4d | 217 | |
d0a7e574 JB |
218 | static int spi_device_configure(struct transport_container *tc, |
219 | struct device *dev, | |
ee959b00 | 220 | struct device *cdev) |
1da177e4 LT |
221 | { |
222 | struct scsi_device *sdev = to_scsi_device(dev); | |
223 | struct scsi_target *starget = sdev->sdev_target; | |
a9e0edb6 JB |
224 | unsigned bflags = scsi_get_device_flags_keyed(sdev, &sdev->inquiry[8], |
225 | &sdev->inquiry[16], | |
226 | SCSI_DEVINFO_SPI); | |
1da177e4 LT |
227 | |
228 | /* Populate the target capability fields with the values | |
229 | * gleaned from the device inquiry */ | |
230 | ||
231 | spi_support_sync(starget) = scsi_device_sync(sdev); | |
232 | spi_support_wide(starget) = scsi_device_wide(sdev); | |
233 | spi_support_dt(starget) = scsi_device_dt(sdev); | |
234 | spi_support_dt_only(starget) = scsi_device_dt_only(sdev); | |
235 | spi_support_ius(starget) = scsi_device_ius(sdev); | |
a9e0edb6 JB |
236 | if (bflags & SPI_BLIST_NOIUS) { |
237 | dev_info(dev, "Information Units disabled by blacklist\n"); | |
238 | spi_support_ius(starget) = 0; | |
239 | } | |
1da177e4 LT |
240 | spi_support_qas(starget) = scsi_device_qas(sdev); |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
d0a7e574 JB |
245 | static int spi_setup_transport_attrs(struct transport_container *tc, |
246 | struct device *dev, | |
ee959b00 | 247 | struct device *cdev) |
1da177e4 LT |
248 | { |
249 | struct scsi_target *starget = to_scsi_target(dev); | |
250 | ||
251 | spi_period(starget) = -1; /* illegal value */ | |
62a86129 | 252 | spi_min_period(starget) = 0; |
1da177e4 | 253 | spi_offset(starget) = 0; /* async */ |
62a86129 | 254 | spi_max_offset(starget) = 255; |
1da177e4 | 255 | spi_width(starget) = 0; /* narrow */ |
62a86129 | 256 | spi_max_width(starget) = 1; |
1da177e4 | 257 | spi_iu(starget) = 0; /* no IU */ |
ea443190 | 258 | spi_max_iu(starget) = 1; |
1da177e4 LT |
259 | spi_dt(starget) = 0; /* ST */ |
260 | spi_qas(starget) = 0; | |
ea443190 | 261 | spi_max_qas(starget) = 1; |
1da177e4 LT |
262 | spi_wr_flow(starget) = 0; |
263 | spi_rd_strm(starget) = 0; | |
264 | spi_rti(starget) = 0; | |
265 | spi_pcomp_en(starget) = 0; | |
d872ebe4 | 266 | spi_hold_mcs(starget) = 0; |
1da177e4 | 267 | spi_dv_pending(starget) = 0; |
dfdc58ba | 268 | spi_dv_in_progress(starget) = 0; |
1da177e4 | 269 | spi_initial_dv(starget) = 0; |
d158d261 | 270 | mutex_init(&spi_dv_mutex(starget)); |
1da177e4 LT |
271 | |
272 | return 0; | |
273 | } | |
274 | ||
62a86129 JB |
275 | #define spi_transport_show_simple(field, format_string) \ |
276 | \ | |
277 | static ssize_t \ | |
ee959b00 TJ |
278 | show_spi_transport_##field(struct device *dev, \ |
279 | struct device_attribute *attr, char *buf) \ | |
62a86129 | 280 | { \ |
ee959b00 | 281 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
282 | struct spi_transport_attrs *tp; \ |
283 | \ | |
284 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
285 | return snprintf(buf, 20, format_string, tp->field); \ | |
286 | } | |
287 | ||
288 | #define spi_transport_store_simple(field, format_string) \ | |
289 | \ | |
290 | static ssize_t \ | |
ee959b00 TJ |
291 | store_spi_transport_##field(struct device *dev, \ |
292 | struct device_attribute *attr, \ | |
293 | const char *buf, size_t count) \ | |
62a86129 JB |
294 | { \ |
295 | int val; \ | |
ee959b00 | 296 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
297 | struct spi_transport_attrs *tp; \ |
298 | \ | |
299 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
300 | val = simple_strtoul(buf, NULL, 0); \ | |
301 | tp->field = val; \ | |
302 | return count; \ | |
303 | } | |
304 | ||
1da177e4 LT |
305 | #define spi_transport_show_function(field, format_string) \ |
306 | \ | |
307 | static ssize_t \ | |
ee959b00 TJ |
308 | show_spi_transport_##field(struct device *dev, \ |
309 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 310 | { \ |
ee959b00 | 311 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
312 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
313 | struct spi_transport_attrs *tp; \ | |
314 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
315 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
316 | if (i->f->get_##field) \ | |
317 | i->f->get_##field(starget); \ | |
318 | return snprintf(buf, 20, format_string, tp->field); \ | |
319 | } | |
320 | ||
321 | #define spi_transport_store_function(field, format_string) \ | |
322 | static ssize_t \ | |
ee959b00 TJ |
323 | store_spi_transport_##field(struct device *dev, \ |
324 | struct device_attribute *attr, \ | |
325 | const char *buf, size_t count) \ | |
1da177e4 LT |
326 | { \ |
327 | int val; \ | |
ee959b00 | 328 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
329 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
330 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
331 | \ | |
9b161a4d JB |
332 | if (!i->f->set_##field) \ |
333 | return -EINVAL; \ | |
1da177e4 | 334 | val = simple_strtoul(buf, NULL, 0); \ |
9b161a4d | 335 | i->f->set_##field(starget, val); \ |
62a86129 JB |
336 | return count; \ |
337 | } | |
338 | ||
339 | #define spi_transport_store_max(field, format_string) \ | |
340 | static ssize_t \ | |
ee959b00 TJ |
341 | store_spi_transport_##field(struct device *dev, \ |
342 | struct device_attribute *attr, \ | |
343 | const char *buf, size_t count) \ | |
62a86129 JB |
344 | { \ |
345 | int val; \ | |
ee959b00 | 346 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
347 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
348 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
349 | struct spi_transport_attrs *tp \ | |
350 | = (struct spi_transport_attrs *)&starget->starget_data; \ | |
351 | \ | |
9b161a4d JB |
352 | if (i->f->set_##field) \ |
353 | return -EINVAL; \ | |
62a86129 JB |
354 | val = simple_strtoul(buf, NULL, 0); \ |
355 | if (val > tp->max_##field) \ | |
356 | val = tp->max_##field; \ | |
1da177e4 LT |
357 | i->f->set_##field(starget, val); \ |
358 | return count; \ | |
359 | } | |
360 | ||
361 | #define spi_transport_rd_attr(field, format_string) \ | |
362 | spi_transport_show_function(field, format_string) \ | |
363 | spi_transport_store_function(field, format_string) \ | |
ee959b00 TJ |
364 | static DEVICE_ATTR(field, S_IRUGO, \ |
365 | show_spi_transport_##field, \ | |
366 | store_spi_transport_##field); | |
1da177e4 | 367 | |
62a86129 JB |
368 | #define spi_transport_simple_attr(field, format_string) \ |
369 | spi_transport_show_simple(field, format_string) \ | |
370 | spi_transport_store_simple(field, format_string) \ | |
ee959b00 TJ |
371 | static DEVICE_ATTR(field, S_IRUGO, \ |
372 | show_spi_transport_##field, \ | |
373 | store_spi_transport_##field); | |
62a86129 JB |
374 | |
375 | #define spi_transport_max_attr(field, format_string) \ | |
376 | spi_transport_show_function(field, format_string) \ | |
377 | spi_transport_store_max(field, format_string) \ | |
378 | spi_transport_simple_attr(max_##field, format_string) \ | |
ee959b00 TJ |
379 | static DEVICE_ATTR(field, S_IRUGO, \ |
380 | show_spi_transport_##field, \ | |
381 | store_spi_transport_##field); | |
62a86129 | 382 | |
1da177e4 | 383 | /* The Parallel SCSI Tranport Attributes: */ |
62a86129 JB |
384 | spi_transport_max_attr(offset, "%d\n"); |
385 | spi_transport_max_attr(width, "%d\n"); | |
ea443190 | 386 | spi_transport_max_attr(iu, "%d\n"); |
1da177e4 | 387 | spi_transport_rd_attr(dt, "%d\n"); |
ea443190 | 388 | spi_transport_max_attr(qas, "%d\n"); |
1da177e4 LT |
389 | spi_transport_rd_attr(wr_flow, "%d\n"); |
390 | spi_transport_rd_attr(rd_strm, "%d\n"); | |
391 | spi_transport_rd_attr(rti, "%d\n"); | |
392 | spi_transport_rd_attr(pcomp_en, "%d\n"); | |
d872ebe4 | 393 | spi_transport_rd_attr(hold_mcs, "%d\n"); |
1da177e4 | 394 | |
e8bac9e0 JB |
395 | /* we only care about the first child device that's a real SCSI device |
396 | * so we return 1 to terminate the iteration when we find it */ | |
9a881f16 | 397 | static int child_iter(struct device *dev, void *data) |
398 | { | |
e8bac9e0 JB |
399 | if (!scsi_is_sdev_device(dev)) |
400 | return 0; | |
9a881f16 | 401 | |
e8bac9e0 | 402 | spi_dv_device(to_scsi_device(dev)); |
9a881f16 | 403 | return 1; |
404 | } | |
405 | ||
1da177e4 | 406 | static ssize_t |
ee959b00 TJ |
407 | store_spi_revalidate(struct device *dev, struct device_attribute *attr, |
408 | const char *buf, size_t count) | |
1da177e4 | 409 | { |
ee959b00 | 410 | struct scsi_target *starget = transport_class_to_starget(dev); |
1da177e4 | 411 | |
9a881f16 | 412 | device_for_each_child(&starget->dev, NULL, child_iter); |
1da177e4 LT |
413 | return count; |
414 | } | |
ee959b00 | 415 | static DEVICE_ATTR(revalidate, S_IWUSR, NULL, store_spi_revalidate); |
1da177e4 LT |
416 | |
417 | /* Translate the period into ns according to the current spec | |
418 | * for SDTR/PPR messages */ | |
ef72582e | 419 | static int period_to_str(char *buf, int period) |
1da177e4 | 420 | { |
1da177e4 | 421 | int len, picosec; |
1da177e4 | 422 | |
62a86129 | 423 | if (period < 0 || period > 0xff) { |
1da177e4 | 424 | picosec = -1; |
62a86129 JB |
425 | } else if (period <= SPI_STATIC_PPR) { |
426 | picosec = ppr_to_ps[period]; | |
1da177e4 | 427 | } else { |
62a86129 | 428 | picosec = period * 4000; |
1da177e4 LT |
429 | } |
430 | ||
431 | if (picosec == -1) { | |
432 | len = sprintf(buf, "reserved"); | |
433 | } else { | |
434 | len = sprint_frac(buf, picosec, 1000); | |
435 | } | |
436 | ||
ef72582e MW |
437 | return len; |
438 | } | |
439 | ||
440 | static ssize_t | |
ea697e45 | 441 | show_spi_transport_period_helper(char *buf, int period) |
ef72582e MW |
442 | { |
443 | int len = period_to_str(buf, period); | |
1da177e4 LT |
444 | buf[len++] = '\n'; |
445 | buf[len] = '\0'; | |
446 | return len; | |
447 | } | |
448 | ||
449 | static ssize_t | |
ee959b00 | 450 | store_spi_transport_period_helper(struct device *dev, const char *buf, |
62a86129 | 451 | size_t count, int *periodp) |
1da177e4 | 452 | { |
1da177e4 LT |
453 | int j, picosec, period = -1; |
454 | char *endp; | |
455 | ||
456 | picosec = simple_strtoul(buf, &endp, 10) * 1000; | |
457 | if (*endp == '.') { | |
458 | int mult = 100; | |
459 | do { | |
460 | endp++; | |
461 | if (!isdigit(*endp)) | |
462 | break; | |
463 | picosec += (*endp - '0') * mult; | |
464 | mult /= 10; | |
465 | } while (mult > 0); | |
466 | } | |
467 | ||
468 | for (j = 0; j <= SPI_STATIC_PPR; j++) { | |
469 | if (ppr_to_ps[j] < picosec) | |
470 | continue; | |
471 | period = j; | |
472 | break; | |
473 | } | |
474 | ||
475 | if (period == -1) | |
476 | period = picosec / 4000; | |
477 | ||
478 | if (period > 0xff) | |
479 | period = 0xff; | |
480 | ||
62a86129 | 481 | *periodp = period; |
1da177e4 LT |
482 | |
483 | return count; | |
484 | } | |
485 | ||
62a86129 | 486 | static ssize_t |
ee959b00 TJ |
487 | show_spi_transport_period(struct device *dev, |
488 | struct device_attribute *attr, char *buf) | |
62a86129 | 489 | { |
ee959b00 | 490 | struct scsi_target *starget = transport_class_to_starget(dev); |
62a86129 JB |
491 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
492 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
493 | struct spi_transport_attrs *tp = | |
494 | (struct spi_transport_attrs *)&starget->starget_data; | |
495 | ||
496 | if (i->f->get_period) | |
497 | i->f->get_period(starget); | |
498 | ||
ea697e45 | 499 | return show_spi_transport_period_helper(buf, tp->period); |
62a86129 JB |
500 | } |
501 | ||
502 | static ssize_t | |
ee959b00 TJ |
503 | store_spi_transport_period(struct device *cdev, struct device_attribute *attr, |
504 | const char *buf, size_t count) | |
62a86129 JB |
505 | { |
506 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
507 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
508 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
509 | struct spi_transport_attrs *tp = | |
510 | (struct spi_transport_attrs *)&starget->starget_data; | |
511 | int period, retval; | |
512 | ||
9b161a4d JB |
513 | if (!i->f->set_period) |
514 | return -EINVAL; | |
515 | ||
62a86129 JB |
516 | retval = store_spi_transport_period_helper(cdev, buf, count, &period); |
517 | ||
518 | if (period < tp->min_period) | |
519 | period = tp->min_period; | |
520 | ||
521 | i->f->set_period(starget, period); | |
522 | ||
523 | return retval; | |
524 | } | |
525 | ||
ee959b00 TJ |
526 | static DEVICE_ATTR(period, S_IRUGO, |
527 | show_spi_transport_period, | |
528 | store_spi_transport_period); | |
1da177e4 | 529 | |
62a86129 | 530 | static ssize_t |
ee959b00 TJ |
531 | show_spi_transport_min_period(struct device *cdev, |
532 | struct device_attribute *attr, char *buf) | |
62a86129 JB |
533 | { |
534 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
9b161a4d JB |
535 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
536 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
62a86129 JB |
537 | struct spi_transport_attrs *tp = |
538 | (struct spi_transport_attrs *)&starget->starget_data; | |
539 | ||
9b161a4d JB |
540 | if (!i->f->set_period) |
541 | return -EINVAL; | |
542 | ||
ea697e45 | 543 | return show_spi_transport_period_helper(buf, tp->min_period); |
62a86129 JB |
544 | } |
545 | ||
546 | static ssize_t | |
ee959b00 TJ |
547 | store_spi_transport_min_period(struct device *cdev, |
548 | struct device_attribute *attr, | |
549 | const char *buf, size_t count) | |
62a86129 JB |
550 | { |
551 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
552 | struct spi_transport_attrs *tp = | |
553 | (struct spi_transport_attrs *)&starget->starget_data; | |
554 | ||
555 | return store_spi_transport_period_helper(cdev, buf, count, | |
556 | &tp->min_period); | |
557 | } | |
558 | ||
559 | ||
ee959b00 TJ |
560 | static DEVICE_ATTR(min_period, S_IRUGO, |
561 | show_spi_transport_min_period, | |
562 | store_spi_transport_min_period); | |
62a86129 JB |
563 | |
564 | ||
ee959b00 TJ |
565 | static ssize_t show_spi_host_signalling(struct device *cdev, |
566 | struct device_attribute *attr, | |
567 | char *buf) | |
1da177e4 LT |
568 | { |
569 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
570 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
571 | ||
572 | if (i->f->get_signalling) | |
573 | i->f->get_signalling(shost); | |
574 | ||
575 | return sprintf(buf, "%s\n", spi_signal_to_string(spi_signalling(shost))); | |
576 | } | |
ee959b00 TJ |
577 | static ssize_t store_spi_host_signalling(struct device *dev, |
578 | struct device_attribute *attr, | |
1da177e4 LT |
579 | const char *buf, size_t count) |
580 | { | |
ee959b00 | 581 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
582 | struct spi_internal *i = to_spi_internal(shost->transportt); |
583 | enum spi_signal_type type = spi_signal_to_value(buf); | |
584 | ||
9b161a4d JB |
585 | if (!i->f->set_signalling) |
586 | return -EINVAL; | |
587 | ||
1da177e4 LT |
588 | if (type != SPI_SIGNAL_UNKNOWN) |
589 | i->f->set_signalling(shost, type); | |
590 | ||
591 | return count; | |
592 | } | |
ee959b00 TJ |
593 | static DEVICE_ATTR(signalling, S_IRUGO, |
594 | show_spi_host_signalling, | |
595 | store_spi_host_signalling); | |
1da177e4 | 596 | |
0ac2377b HR |
597 | static ssize_t show_spi_host_width(struct device *cdev, |
598 | struct device_attribute *attr, | |
599 | char *buf) | |
600 | { | |
601 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
602 | ||
603 | return sprintf(buf, "%s\n", shost->max_id == 16 ? "wide" : "narrow"); | |
604 | } | |
605 | static DEVICE_ATTR(host_width, S_IRUGO, | |
606 | show_spi_host_width, NULL); | |
607 | ||
608 | static ssize_t show_spi_host_hba_id(struct device *cdev, | |
609 | struct device_attribute *attr, | |
610 | char *buf) | |
611 | { | |
612 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
613 | ||
614 | return sprintf(buf, "%d\n", shost->this_id); | |
615 | } | |
616 | static DEVICE_ATTR(hba_id, S_IRUGO, | |
617 | show_spi_host_hba_id, NULL); | |
618 | ||
1da177e4 LT |
619 | #define DV_SET(x, y) \ |
620 | if(i->f->set_##x) \ | |
621 | i->f->set_##x(sdev->sdev_target, y) | |
622 | ||
1da177e4 LT |
623 | enum spi_compare_returns { |
624 | SPI_COMPARE_SUCCESS, | |
625 | SPI_COMPARE_FAILURE, | |
626 | SPI_COMPARE_SKIP_TEST, | |
627 | }; | |
628 | ||
629 | ||
630 | /* This is for read/write Domain Validation: If the device supports | |
631 | * an echo buffer, we do read/write tests to it */ | |
632 | static enum spi_compare_returns | |
33aa687d | 633 | spi_dv_device_echo_buffer(struct scsi_device *sdev, u8 *buffer, |
1da177e4 LT |
634 | u8 *ptr, const int retries) |
635 | { | |
1da177e4 | 636 | int len = ptr - buffer; |
33aa687d | 637 | int j, k, r, result; |
1da177e4 | 638 | unsigned int pattern = 0x0000ffff; |
33aa687d | 639 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
640 | |
641 | const char spi_write_buffer[] = { | |
642 | WRITE_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 | |
643 | }; | |
644 | const char spi_read_buffer[] = { | |
645 | READ_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 | |
646 | }; | |
647 | ||
648 | /* set up the pattern buffer. Doesn't matter if we spill | |
649 | * slightly beyond since that's where the read buffer is */ | |
650 | for (j = 0; j < len; ) { | |
651 | ||
652 | /* fill the buffer with counting (test a) */ | |
653 | for ( ; j < min(len, 32); j++) | |
654 | buffer[j] = j; | |
655 | k = j; | |
656 | /* fill the buffer with alternating words of 0x0 and | |
657 | * 0xffff (test b) */ | |
658 | for ( ; j < min(len, k + 32); j += 2) { | |
659 | u16 *word = (u16 *)&buffer[j]; | |
660 | ||
661 | *word = (j & 0x02) ? 0x0000 : 0xffff; | |
662 | } | |
663 | k = j; | |
664 | /* fill with crosstalk (alternating 0x5555 0xaaa) | |
665 | * (test c) */ | |
666 | for ( ; j < min(len, k + 32); j += 2) { | |
667 | u16 *word = (u16 *)&buffer[j]; | |
668 | ||
669 | *word = (j & 0x02) ? 0x5555 : 0xaaaa; | |
670 | } | |
671 | k = j; | |
672 | /* fill with shifting bits (test d) */ | |
673 | for ( ; j < min(len, k + 32); j += 4) { | |
674 | u32 *word = (unsigned int *)&buffer[j]; | |
675 | u32 roll = (pattern & 0x80000000) ? 1 : 0; | |
676 | ||
677 | *word = pattern; | |
678 | pattern = (pattern << 1) | roll; | |
679 | } | |
680 | /* don't bother with random data (test e) */ | |
681 | } | |
682 | ||
683 | for (r = 0; r < retries; r++) { | |
33aa687d JB |
684 | result = spi_execute(sdev, spi_write_buffer, DMA_TO_DEVICE, |
685 | buffer, len, &sshdr); | |
686 | if(result || !scsi_device_online(sdev)) { | |
1da177e4 LT |
687 | |
688 | scsi_device_set_state(sdev, SDEV_QUIESCE); | |
33aa687d | 689 | if (scsi_sense_valid(&sshdr) |
1da177e4 LT |
690 | && sshdr.sense_key == ILLEGAL_REQUEST |
691 | /* INVALID FIELD IN CDB */ | |
692 | && sshdr.asc == 0x24 && sshdr.ascq == 0x00) | |
693 | /* This would mean that the drive lied | |
694 | * to us about supporting an echo | |
695 | * buffer (unfortunately some Western | |
696 | * Digital drives do precisely this) | |
697 | */ | |
698 | return SPI_COMPARE_SKIP_TEST; | |
699 | ||
700 | ||
9ccfc756 | 701 | sdev_printk(KERN_ERR, sdev, "Write Buffer failure %x\n", result); |
1da177e4 LT |
702 | return SPI_COMPARE_FAILURE; |
703 | } | |
704 | ||
705 | memset(ptr, 0, len); | |
33aa687d JB |
706 | spi_execute(sdev, spi_read_buffer, DMA_FROM_DEVICE, |
707 | ptr, len, NULL); | |
1da177e4 LT |
708 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
709 | ||
710 | if (memcmp(buffer, ptr, len) != 0) | |
711 | return SPI_COMPARE_FAILURE; | |
712 | } | |
713 | return SPI_COMPARE_SUCCESS; | |
714 | } | |
715 | ||
716 | /* This is for the simplest form of Domain Validation: a read test | |
717 | * on the inquiry data from the device */ | |
718 | static enum spi_compare_returns | |
33aa687d | 719 | spi_dv_device_compare_inquiry(struct scsi_device *sdev, u8 *buffer, |
1da177e4 LT |
720 | u8 *ptr, const int retries) |
721 | { | |
33aa687d JB |
722 | int r, result; |
723 | const int len = sdev->inquiry_len; | |
1da177e4 LT |
724 | const char spi_inquiry[] = { |
725 | INQUIRY, 0, 0, 0, len, 0 | |
726 | }; | |
727 | ||
728 | for (r = 0; r < retries; r++) { | |
1da177e4 LT |
729 | memset(ptr, 0, len); |
730 | ||
33aa687d JB |
731 | result = spi_execute(sdev, spi_inquiry, DMA_FROM_DEVICE, |
732 | ptr, len, NULL); | |
1da177e4 | 733 | |
33aa687d | 734 | if(result || !scsi_device_online(sdev)) { |
1da177e4 LT |
735 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
736 | return SPI_COMPARE_FAILURE; | |
737 | } | |
738 | ||
739 | /* If we don't have the inquiry data already, the | |
740 | * first read gets it */ | |
741 | if (ptr == buffer) { | |
742 | ptr += len; | |
743 | --r; | |
744 | continue; | |
745 | } | |
746 | ||
747 | if (memcmp(buffer, ptr, len) != 0) | |
748 | /* failure */ | |
749 | return SPI_COMPARE_FAILURE; | |
750 | } | |
751 | return SPI_COMPARE_SUCCESS; | |
752 | } | |
753 | ||
754 | static enum spi_compare_returns | |
33aa687d | 755 | spi_dv_retrain(struct scsi_device *sdev, u8 *buffer, u8 *ptr, |
1da177e4 | 756 | enum spi_compare_returns |
33aa687d | 757 | (*compare_fn)(struct scsi_device *, u8 *, u8 *, int)) |
1da177e4 | 758 | { |
33aa687d | 759 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
9a8bc9b8 | 760 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 LT |
761 | int period = 0, prevperiod = 0; |
762 | enum spi_compare_returns retval; | |
763 | ||
764 | ||
765 | for (;;) { | |
766 | int newperiod; | |
33aa687d | 767 | retval = compare_fn(sdev, buffer, ptr, DV_LOOPS); |
1da177e4 LT |
768 | |
769 | if (retval == SPI_COMPARE_SUCCESS | |
770 | || retval == SPI_COMPARE_SKIP_TEST) | |
771 | break; | |
772 | ||
773 | /* OK, retrain, fallback */ | |
9a8bc9b8 JB |
774 | if (i->f->get_iu) |
775 | i->f->get_iu(starget); | |
776 | if (i->f->get_qas) | |
777 | i->f->get_qas(starget); | |
1da177e4 LT |
778 | if (i->f->get_period) |
779 | i->f->get_period(sdev->sdev_target); | |
9a8bc9b8 JB |
780 | |
781 | /* Here's the fallback sequence; first try turning off | |
782 | * IU, then QAS (if we can control them), then finally | |
783 | * fall down the periods */ | |
784 | if (i->f->set_iu && spi_iu(starget)) { | |
804ff603 | 785 | starget_printk(KERN_ERR, starget, "Domain Validation Disabling Information Units\n"); |
9a8bc9b8 JB |
786 | DV_SET(iu, 0); |
787 | } else if (i->f->set_qas && spi_qas(starget)) { | |
804ff603 | 788 | starget_printk(KERN_ERR, starget, "Domain Validation Disabling Quick Arbitration and Selection\n"); |
9a8bc9b8 JB |
789 | DV_SET(qas, 0); |
790 | } else { | |
791 | newperiod = spi_period(starget); | |
792 | period = newperiod > period ? newperiod : period; | |
793 | if (period < 0x0d) | |
794 | period++; | |
795 | else | |
796 | period += period >> 1; | |
797 | ||
798 | if (unlikely(period > 0xff || period == prevperiod)) { | |
799 | /* Total failure; set to async and return */ | |
9ccfc756 | 800 | starget_printk(KERN_ERR, starget, "Domain Validation Failure, dropping back to Asynchronous\n"); |
9a8bc9b8 JB |
801 | DV_SET(offset, 0); |
802 | return SPI_COMPARE_FAILURE; | |
803 | } | |
9ccfc756 | 804 | starget_printk(KERN_ERR, starget, "Domain Validation detected failure, dropping back\n"); |
9a8bc9b8 JB |
805 | DV_SET(period, period); |
806 | prevperiod = period; | |
1da177e4 | 807 | } |
1da177e4 LT |
808 | } |
809 | return retval; | |
810 | } | |
811 | ||
812 | static int | |
33aa687d | 813 | spi_dv_device_get_echo_buffer(struct scsi_device *sdev, u8 *buffer) |
1da177e4 | 814 | { |
33aa687d | 815 | int l, result; |
1da177e4 LT |
816 | |
817 | /* first off do a test unit ready. This can error out | |
818 | * because of reservations or some other reason. If it | |
819 | * fails, the device won't let us write to the echo buffer | |
820 | * so just return failure */ | |
821 | ||
822 | const char spi_test_unit_ready[] = { | |
823 | TEST_UNIT_READY, 0, 0, 0, 0, 0 | |
824 | }; | |
825 | ||
826 | const char spi_read_buffer_descriptor[] = { | |
827 | READ_BUFFER, 0x0b, 0, 0, 0, 0, 0, 0, 4, 0 | |
828 | }; | |
829 | ||
830 | ||
1da177e4 LT |
831 | /* We send a set of three TURs to clear any outstanding |
832 | * unit attention conditions if they exist (Otherwise the | |
833 | * buffer tests won't be happy). If the TUR still fails | |
834 | * (reservation conflict, device not ready, etc) just | |
835 | * skip the write tests */ | |
836 | for (l = 0; ; l++) { | |
33aa687d JB |
837 | result = spi_execute(sdev, spi_test_unit_ready, DMA_NONE, |
838 | NULL, 0, NULL); | |
1da177e4 | 839 | |
33aa687d | 840 | if(result) { |
1da177e4 LT |
841 | if(l >= 3) |
842 | return 0; | |
843 | } else { | |
844 | /* TUR succeeded */ | |
845 | break; | |
846 | } | |
847 | } | |
848 | ||
33aa687d JB |
849 | result = spi_execute(sdev, spi_read_buffer_descriptor, |
850 | DMA_FROM_DEVICE, buffer, 4, NULL); | |
1da177e4 | 851 | |
33aa687d | 852 | if (result) |
1da177e4 LT |
853 | /* Device has no echo buffer */ |
854 | return 0; | |
855 | ||
856 | return buffer[3] + ((buffer[2] & 0x1f) << 8); | |
857 | } | |
858 | ||
859 | static void | |
33aa687d | 860 | spi_dv_device_internal(struct scsi_device *sdev, u8 *buffer) |
1da177e4 | 861 | { |
33aa687d | 862 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
62a86129 | 863 | struct scsi_target *starget = sdev->sdev_target; |
60eef257 | 864 | struct Scsi_Host *shost = sdev->host; |
1da177e4 | 865 | int len = sdev->inquiry_len; |
2302827c JB |
866 | int min_period = spi_min_period(starget); |
867 | int max_width = spi_max_width(starget); | |
1da177e4 LT |
868 | /* first set us up for narrow async */ |
869 | DV_SET(offset, 0); | |
870 | DV_SET(width, 0); | |
2302827c | 871 | |
33aa687d | 872 | if (spi_dv_device_compare_inquiry(sdev, buffer, buffer, DV_LOOPS) |
1da177e4 | 873 | != SPI_COMPARE_SUCCESS) { |
9ccfc756 | 874 | starget_printk(KERN_ERR, starget, "Domain Validation Initial Inquiry Failed\n"); |
1da177e4 LT |
875 | /* FIXME: should probably offline the device here? */ |
876 | return; | |
877 | } | |
878 | ||
9872b81c | 879 | if (!spi_support_wide(starget)) { |
2302827c JB |
880 | spi_max_width(starget) = 0; |
881 | max_width = 0; | |
882 | } | |
883 | ||
1da177e4 | 884 | /* test width */ |
2302827c | 885 | if (i->f->set_width && max_width) { |
9a8bc9b8 | 886 | i->f->set_width(starget, 1); |
62a86129 | 887 | |
33aa687d | 888 | if (spi_dv_device_compare_inquiry(sdev, buffer, |
1da177e4 LT |
889 | buffer + len, |
890 | DV_LOOPS) | |
891 | != SPI_COMPARE_SUCCESS) { | |
9ccfc756 | 892 | starget_printk(KERN_ERR, starget, "Wide Transfers Fail\n"); |
9a8bc9b8 | 893 | i->f->set_width(starget, 0); |
2302827c JB |
894 | /* Make sure we don't force wide back on by asking |
895 | * for a transfer period that requires it */ | |
896 | max_width = 0; | |
897 | if (min_period < 10) | |
898 | min_period = 10; | |
1da177e4 LT |
899 | } |
900 | } | |
901 | ||
902 | if (!i->f->set_period) | |
903 | return; | |
904 | ||
905 | /* device can't handle synchronous */ | |
9872b81c | 906 | if (!spi_support_sync(starget) && !spi_support_dt(starget)) |
1da177e4 LT |
907 | return; |
908 | ||
349cd7cf JB |
909 | /* len == -1 is the signal that we need to ascertain the |
910 | * presence of an echo buffer before trying to use it. len == | |
911 | * 0 means we don't have an echo buffer */ | |
912 | len = -1; | |
1da177e4 LT |
913 | |
914 | retry: | |
915 | ||
916 | /* now set up to the maximum */ | |
62a86129 | 917 | DV_SET(offset, spi_max_offset(starget)); |
2302827c JB |
918 | DV_SET(period, min_period); |
919 | ||
9a8bc9b8 JB |
920 | /* try QAS requests; this should be harmless to set if the |
921 | * target supports it */ | |
9872b81c | 922 | if (spi_support_qas(starget) && spi_max_qas(starget)) { |
eb1dd68b | 923 | DV_SET(qas, 1); |
dfdc58ba JB |
924 | } else { |
925 | DV_SET(qas, 0); | |
926 | } | |
927 | ||
9872b81c JB |
928 | if (spi_support_ius(starget) && spi_max_iu(starget) && |
929 | min_period < 9) { | |
dfdc58ba | 930 | /* This u320 (or u640). Set IU transfers */ |
eb1dd68b | 931 | DV_SET(iu, 1); |
dfdc58ba | 932 | /* Then set the optional parameters */ |
9a8bc9b8 JB |
933 | DV_SET(rd_strm, 1); |
934 | DV_SET(wr_flow, 1); | |
935 | DV_SET(rti, 1); | |
2302827c | 936 | if (min_period == 8) |
9a8bc9b8 | 937 | DV_SET(pcomp_en, 1); |
dfdc58ba JB |
938 | } else { |
939 | DV_SET(iu, 0); | |
9a8bc9b8 | 940 | } |
dfdc58ba | 941 | |
60eef257 JB |
942 | /* now that we've done all this, actually check the bus |
943 | * signal type (if known). Some devices are stupid on | |
944 | * a SE bus and still claim they can try LVD only settings */ | |
945 | if (i->f->get_signalling) | |
946 | i->f->get_signalling(shost); | |
947 | if (spi_signalling(shost) == SPI_SIGNAL_SE || | |
dfdc58ba | 948 | spi_signalling(shost) == SPI_SIGNAL_HVD || |
9872b81c | 949 | !spi_support_dt(starget)) { |
60eef257 | 950 | DV_SET(dt, 0); |
dfdc58ba JB |
951 | } else { |
952 | DV_SET(dt, 1); | |
953 | } | |
2302827c JB |
954 | /* set width last because it will pull all the other |
955 | * parameters down to required values */ | |
956 | DV_SET(width, max_width); | |
957 | ||
349cd7cf JB |
958 | /* Do the read only INQUIRY tests */ |
959 | spi_dv_retrain(sdev, buffer, buffer + sdev->inquiry_len, | |
960 | spi_dv_device_compare_inquiry); | |
961 | /* See if we actually managed to negotiate and sustain DT */ | |
962 | if (i->f->get_dt) | |
963 | i->f->get_dt(starget); | |
964 | ||
965 | /* see if the device has an echo buffer. If it does we can do | |
966 | * the SPI pattern write tests. Because of some broken | |
967 | * devices, we *only* try this on a device that has actually | |
968 | * negotiated DT */ | |
969 | ||
970 | if (len == -1 && spi_dt(starget)) | |
971 | len = spi_dv_device_get_echo_buffer(sdev, buffer); | |
1da177e4 | 972 | |
349cd7cf | 973 | if (len <= 0) { |
9ccfc756 | 974 | starget_printk(KERN_INFO, starget, "Domain Validation skipping write tests\n"); |
1da177e4 LT |
975 | return; |
976 | } | |
977 | ||
978 | if (len > SPI_MAX_ECHO_BUFFER_SIZE) { | |
9ccfc756 | 979 | starget_printk(KERN_WARNING, starget, "Echo buffer size %d is too big, trimming to %d\n", len, SPI_MAX_ECHO_BUFFER_SIZE); |
1da177e4 LT |
980 | len = SPI_MAX_ECHO_BUFFER_SIZE; |
981 | } | |
982 | ||
33aa687d | 983 | if (spi_dv_retrain(sdev, buffer, buffer + len, |
1da177e4 LT |
984 | spi_dv_device_echo_buffer) |
985 | == SPI_COMPARE_SKIP_TEST) { | |
986 | /* OK, the stupid drive can't do a write echo buffer | |
987 | * test after all, fall back to the read tests */ | |
988 | len = 0; | |
989 | goto retry; | |
990 | } | |
991 | } | |
992 | ||
993 | ||
994 | /** spi_dv_device - Do Domain Validation on the device | |
995 | * @sdev: scsi device to validate | |
996 | * | |
997 | * Performs the domain validation on the given device in the | |
998 | * current execution thread. Since DV operations may sleep, | |
999 | * the current thread must have user context. Also no SCSI | |
1000 | * related locks that would deadlock I/O issued by the DV may | |
1001 | * be held. | |
1002 | */ | |
1003 | void | |
1004 | spi_dv_device(struct scsi_device *sdev) | |
1005 | { | |
1da177e4 LT |
1006 | struct scsi_target *starget = sdev->sdev_target; |
1007 | u8 *buffer; | |
1008 | const int len = SPI_MAX_ECHO_BUFFER_SIZE*2; | |
1009 | ||
89a342ca | 1010 | if (unlikely(spi_dv_in_progress(starget))) |
33aa687d | 1011 | return; |
1da177e4 | 1012 | |
89a342ca | 1013 | if (unlikely(scsi_device_get(sdev))) |
dfdc58ba JB |
1014 | return; |
1015 | spi_dv_in_progress(starget) = 1; | |
1016 | ||
24669f75 | 1017 | buffer = kzalloc(len, GFP_KERNEL); |
1da177e4 LT |
1018 | |
1019 | if (unlikely(!buffer)) | |
1020 | goto out_put; | |
1021 | ||
1da177e4 LT |
1022 | /* We need to verify that the actual device will quiesce; the |
1023 | * later target quiesce is just a nice to have */ | |
1024 | if (unlikely(scsi_device_quiesce(sdev))) | |
1025 | goto out_free; | |
1026 | ||
1027 | scsi_target_quiesce(starget); | |
1028 | ||
1029 | spi_dv_pending(starget) = 1; | |
d158d261 | 1030 | mutex_lock(&spi_dv_mutex(starget)); |
1da177e4 | 1031 | |
9ccfc756 | 1032 | starget_printk(KERN_INFO, starget, "Beginning Domain Validation\n"); |
1da177e4 | 1033 | |
33aa687d | 1034 | spi_dv_device_internal(sdev, buffer); |
1da177e4 | 1035 | |
9ccfc756 | 1036 | starget_printk(KERN_INFO, starget, "Ending Domain Validation\n"); |
1da177e4 | 1037 | |
d158d261 | 1038 | mutex_unlock(&spi_dv_mutex(starget)); |
1da177e4 LT |
1039 | spi_dv_pending(starget) = 0; |
1040 | ||
1041 | scsi_target_resume(starget); | |
1042 | ||
1043 | spi_initial_dv(starget) = 1; | |
1044 | ||
1045 | out_free: | |
1046 | kfree(buffer); | |
1047 | out_put: | |
dfdc58ba | 1048 | spi_dv_in_progress(starget) = 0; |
1da177e4 | 1049 | scsi_device_put(sdev); |
1da177e4 LT |
1050 | } |
1051 | EXPORT_SYMBOL(spi_dv_device); | |
1052 | ||
1053 | struct work_queue_wrapper { | |
1054 | struct work_struct work; | |
1055 | struct scsi_device *sdev; | |
1056 | }; | |
1057 | ||
1058 | static void | |
c4028958 | 1059 | spi_dv_device_work_wrapper(struct work_struct *work) |
1da177e4 | 1060 | { |
c4028958 DH |
1061 | struct work_queue_wrapper *wqw = |
1062 | container_of(work, struct work_queue_wrapper, work); | |
1da177e4 LT |
1063 | struct scsi_device *sdev = wqw->sdev; |
1064 | ||
1065 | kfree(wqw); | |
1066 | spi_dv_device(sdev); | |
1067 | spi_dv_pending(sdev->sdev_target) = 0; | |
1068 | scsi_device_put(sdev); | |
1069 | } | |
1070 | ||
1071 | ||
1072 | /** | |
1073 | * spi_schedule_dv_device - schedule domain validation to occur on the device | |
1074 | * @sdev: The device to validate | |
1075 | * | |
1076 | * Identical to spi_dv_device() above, except that the DV will be | |
1077 | * scheduled to occur in a workqueue later. All memory allocations | |
1078 | * are atomic, so may be called from any context including those holding | |
1079 | * SCSI locks. | |
1080 | */ | |
1081 | void | |
1082 | spi_schedule_dv_device(struct scsi_device *sdev) | |
1083 | { | |
1084 | struct work_queue_wrapper *wqw = | |
1085 | kmalloc(sizeof(struct work_queue_wrapper), GFP_ATOMIC); | |
1086 | ||
1087 | if (unlikely(!wqw)) | |
1088 | return; | |
1089 | ||
1090 | if (unlikely(spi_dv_pending(sdev->sdev_target))) { | |
1091 | kfree(wqw); | |
1092 | return; | |
1093 | } | |
1094 | /* Set pending early (dv_device doesn't check it, only sets it) */ | |
1095 | spi_dv_pending(sdev->sdev_target) = 1; | |
1096 | if (unlikely(scsi_device_get(sdev))) { | |
1097 | kfree(wqw); | |
1098 | spi_dv_pending(sdev->sdev_target) = 0; | |
1099 | return; | |
1100 | } | |
1101 | ||
c4028958 | 1102 | INIT_WORK(&wqw->work, spi_dv_device_work_wrapper); |
1da177e4 LT |
1103 | wqw->sdev = sdev; |
1104 | ||
1105 | schedule_work(&wqw->work); | |
1106 | } | |
1107 | EXPORT_SYMBOL(spi_schedule_dv_device); | |
1108 | ||
1109 | /** | |
1110 | * spi_display_xfer_agreement - Print the current target transfer agreement | |
1111 | * @starget: The target for which to display the agreement | |
1112 | * | |
1113 | * Each SPI port is required to maintain a transfer agreement for each | |
1114 | * other port on the bus. This function prints a one-line summary of | |
1115 | * the current agreement; more detailed information is available in sysfs. | |
1116 | */ | |
1117 | void spi_display_xfer_agreement(struct scsi_target *starget) | |
1118 | { | |
1119 | struct spi_transport_attrs *tp; | |
1120 | tp = (struct spi_transport_attrs *)&starget->starget_data; | |
1121 | ||
1122 | if (tp->offset > 0 && tp->period > 0) { | |
1123 | unsigned int picosec, kb100; | |
1124 | char *scsi = "FAST-?"; | |
1125 | char tmp[8]; | |
1126 | ||
1127 | if (tp->period <= SPI_STATIC_PPR) { | |
1128 | picosec = ppr_to_ps[tp->period]; | |
1129 | switch (tp->period) { | |
1130 | case 7: scsi = "FAST-320"; break; | |
1131 | case 8: scsi = "FAST-160"; break; | |
1132 | case 9: scsi = "FAST-80"; break; | |
1133 | case 10: | |
1134 | case 11: scsi = "FAST-40"; break; | |
1135 | case 12: scsi = "FAST-20"; break; | |
1136 | } | |
1137 | } else { | |
1138 | picosec = tp->period * 4000; | |
1139 | if (tp->period < 25) | |
1140 | scsi = "FAST-20"; | |
1141 | else if (tp->period < 50) | |
1142 | scsi = "FAST-10"; | |
1143 | else | |
1144 | scsi = "FAST-5"; | |
1145 | } | |
1146 | ||
1147 | kb100 = (10000000 + picosec / 2) / picosec; | |
1148 | if (tp->width) | |
1149 | kb100 *= 2; | |
1150 | sprint_frac(tmp, picosec, 1000); | |
1151 | ||
1152 | dev_info(&starget->dev, | |
d872ebe4 JB |
1153 | "%s %sSCSI %d.%d MB/s %s%s%s%s%s%s%s%s (%s ns, offset %d)\n", |
1154 | scsi, tp->width ? "WIDE " : "", kb100/10, kb100 % 10, | |
1155 | tp->dt ? "DT" : "ST", | |
1156 | tp->iu ? " IU" : "", | |
1157 | tp->qas ? " QAS" : "", | |
1158 | tp->rd_strm ? " RDSTRM" : "", | |
1159 | tp->rti ? " RTI" : "", | |
1160 | tp->wr_flow ? " WRFLOW" : "", | |
1161 | tp->pcomp_en ? " PCOMP" : "", | |
1162 | tp->hold_mcs ? " HMCS" : "", | |
1163 | tmp, tp->offset); | |
1da177e4 | 1164 | } else { |
493ff4ee | 1165 | dev_info(&starget->dev, "%sasynchronous\n", |
1da177e4 LT |
1166 | tp->width ? "wide " : ""); |
1167 | } | |
1168 | } | |
1169 | EXPORT_SYMBOL(spi_display_xfer_agreement); | |
1170 | ||
6ea3c0b2 MW |
1171 | int spi_populate_width_msg(unsigned char *msg, int width) |
1172 | { | |
1173 | msg[0] = EXTENDED_MESSAGE; | |
1174 | msg[1] = 2; | |
1175 | msg[2] = EXTENDED_WDTR; | |
1176 | msg[3] = width; | |
1177 | return 4; | |
1178 | } | |
38e14f89 | 1179 | EXPORT_SYMBOL_GPL(spi_populate_width_msg); |
6ea3c0b2 MW |
1180 | |
1181 | int spi_populate_sync_msg(unsigned char *msg, int period, int offset) | |
1182 | { | |
1183 | msg[0] = EXTENDED_MESSAGE; | |
1184 | msg[1] = 3; | |
1185 | msg[2] = EXTENDED_SDTR; | |
1186 | msg[3] = period; | |
1187 | msg[4] = offset; | |
1188 | return 5; | |
1189 | } | |
38e14f89 | 1190 | EXPORT_SYMBOL_GPL(spi_populate_sync_msg); |
6ea3c0b2 MW |
1191 | |
1192 | int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, | |
1193 | int width, int options) | |
1194 | { | |
1195 | msg[0] = EXTENDED_MESSAGE; | |
1196 | msg[1] = 6; | |
1197 | msg[2] = EXTENDED_PPR; | |
1198 | msg[3] = period; | |
1199 | msg[4] = 0; | |
1200 | msg[5] = offset; | |
1201 | msg[6] = width; | |
1202 | msg[7] = options; | |
1203 | return 8; | |
1204 | } | |
38e14f89 | 1205 | EXPORT_SYMBOL_GPL(spi_populate_ppr_msg); |
6ea3c0b2 | 1206 | |
50668633 CH |
1207 | /** |
1208 | * spi_populate_tag_msg - place a tag message in a buffer | |
1209 | * @msg: pointer to the area to place the tag | |
1210 | * @cmd: pointer to the scsi command for the tag | |
1211 | * | |
1212 | * Notes: | |
1213 | * designed to create the correct type of tag message for the | |
1214 | * particular request. Returns the size of the tag message. | |
1215 | * May return 0 if TCQ is disabled for this device. | |
1216 | **/ | |
1217 | int spi_populate_tag_msg(unsigned char *msg, struct scsi_cmnd *cmd) | |
1218 | { | |
1219 | if (cmd->flags & SCMD_TAGGED) { | |
68d81f40 | 1220 | *msg++ = SIMPLE_QUEUE_TAG; |
50668633 CH |
1221 | *msg++ = cmd->request->tag; |
1222 | return 2; | |
1223 | } | |
1224 | ||
1225 | return 0; | |
1226 | } | |
1227 | EXPORT_SYMBOL_GPL(spi_populate_tag_msg); | |
1228 | ||
410ca5c7 MW |
1229 | #ifdef CONFIG_SCSI_CONSTANTS |
1230 | static const char * const one_byte_msgs[] = { | |
72df0ebf | 1231 | /* 0x00 */ "Task Complete", NULL /* Extended Message */, "Save Pointers", |
410ca5c7 | 1232 | /* 0x03 */ "Restore Pointers", "Disconnect", "Initiator Error", |
72df0ebf | 1233 | /* 0x06 */ "Abort Task Set", "Message Reject", "Nop", "Message Parity Error", |
410ca5c7 | 1234 | /* 0x0a */ "Linked Command Complete", "Linked Command Complete w/flag", |
72df0ebf MW |
1235 | /* 0x0c */ "Target Reset", "Abort Task", "Clear Task Set", |
1236 | /* 0x0f */ "Initiate Recovery", "Release Recovery", | |
1237 | /* 0x11 */ "Terminate Process", "Continue Task", "Target Transfer Disable", | |
1238 | /* 0x14 */ NULL, NULL, "Clear ACA", "LUN Reset" | |
410ca5c7 | 1239 | }; |
410ca5c7 MW |
1240 | |
1241 | static const char * const two_byte_msgs[] = { | |
47972153 | 1242 | /* 0x20 */ "Simple Queue Tag", "Head of Queue Tag", "Ordered Queue Tag", |
72df0ebf | 1243 | /* 0x23 */ "Ignore Wide Residue", "ACA" |
410ca5c7 | 1244 | }; |
410ca5c7 MW |
1245 | |
1246 | static const char * const extended_msgs[] = { | |
1247 | /* 0x00 */ "Modify Data Pointer", "Synchronous Data Transfer Request", | |
ef72582e | 1248 | /* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request", |
fc25307d | 1249 | /* 0x04 */ "Parallel Protocol Request", "Modify Bidirectional Data Pointer" |
410ca5c7 | 1250 | }; |
410ca5c7 | 1251 | |
bdd70f2c | 1252 | static void print_nego(const unsigned char *msg, int per, int off, int width) |
ef72582e MW |
1253 | { |
1254 | if (per) { | |
1255 | char buf[20]; | |
1256 | period_to_str(buf, msg[per]); | |
1257 | printk("period = %s ns ", buf); | |
1258 | } | |
1259 | ||
1260 | if (off) | |
1261 | printk("offset = %d ", msg[off]); | |
1262 | if (width) | |
1263 | printk("width = %d ", 8 << msg[width]); | |
1264 | } | |
410ca5c7 | 1265 | |
fc25307d MW |
1266 | static void print_ptr(const unsigned char *msg, int msb, const char *desc) |
1267 | { | |
1268 | int ptr = (msg[msb] << 24) | (msg[msb+1] << 16) | (msg[msb+2] << 8) | | |
1269 | msg[msb+3]; | |
1270 | printk("%s = %d ", desc, ptr); | |
1271 | } | |
1272 | ||
1abfd370 | 1273 | int spi_print_msg(const unsigned char *msg) |
410ca5c7 | 1274 | { |
72df0ebf | 1275 | int len = 1, i; |
410ca5c7 | 1276 | if (msg[0] == EXTENDED_MESSAGE) { |
fc25307d MW |
1277 | len = 2 + msg[1]; |
1278 | if (len == 2) | |
1279 | len += 256; | |
b32aaffc | 1280 | if (msg[2] < ARRAY_SIZE(extended_msgs)) |
410ca5c7 MW |
1281 | printk ("%s ", extended_msgs[msg[2]]); |
1282 | else | |
1283 | printk ("Extended Message, reserved code (0x%02x) ", | |
1284 | (int) msg[2]); | |
1285 | switch (msg[2]) { | |
1286 | case EXTENDED_MODIFY_DATA_POINTER: | |
fc25307d | 1287 | print_ptr(msg, 3, "pointer"); |
410ca5c7 MW |
1288 | break; |
1289 | case EXTENDED_SDTR: | |
ef72582e | 1290 | print_nego(msg, 3, 4, 0); |
410ca5c7 MW |
1291 | break; |
1292 | case EXTENDED_WDTR: | |
ef72582e MW |
1293 | print_nego(msg, 0, 0, 3); |
1294 | break; | |
1295 | case EXTENDED_PPR: | |
1296 | print_nego(msg, 3, 5, 6); | |
410ca5c7 | 1297 | break; |
fc25307d MW |
1298 | case EXTENDED_MODIFY_BIDI_DATA_PTR: |
1299 | print_ptr(msg, 3, "out"); | |
1300 | print_ptr(msg, 7, "in"); | |
1301 | break; | |
410ca5c7 MW |
1302 | default: |
1303 | for (i = 2; i < len; ++i) | |
1304 | printk("%02x ", msg[i]); | |
1305 | } | |
1306 | /* Identify */ | |
1307 | } else if (msg[0] & 0x80) { | |
1308 | printk("Identify disconnect %sallowed %s %d ", | |
1309 | (msg[0] & 0x40) ? "" : "not ", | |
1310 | (msg[0] & 0x20) ? "target routine" : "lun", | |
1311 | msg[0] & 0x7); | |
410ca5c7 MW |
1312 | /* Normal One byte */ |
1313 | } else if (msg[0] < 0x1f) { | |
72df0ebf | 1314 | if (msg[0] < ARRAY_SIZE(one_byte_msgs) && one_byte_msgs[msg[0]]) |
e24d873d | 1315 | printk("%s ", one_byte_msgs[msg[0]]); |
410ca5c7 MW |
1316 | else |
1317 | printk("reserved (%02x) ", msg[0]); | |
72df0ebf MW |
1318 | } else if (msg[0] == 0x55) { |
1319 | printk("QAS Request "); | |
410ca5c7 MW |
1320 | /* Two byte */ |
1321 | } else if (msg[0] <= 0x2f) { | |
b32aaffc | 1322 | if ((msg[0] - 0x20) < ARRAY_SIZE(two_byte_msgs)) |
410ca5c7 MW |
1323 | printk("%s %02x ", two_byte_msgs[msg[0] - 0x20], |
1324 | msg[1]); | |
1325 | else | |
1326 | printk("reserved two byte (%02x %02x) ", | |
1327 | msg[0], msg[1]); | |
1328 | len = 2; | |
1329 | } else | |
e24d873d | 1330 | printk("reserved "); |
410ca5c7 MW |
1331 | return len; |
1332 | } | |
1abfd370 | 1333 | EXPORT_SYMBOL(spi_print_msg); |
410ca5c7 MW |
1334 | |
1335 | #else /* ifndef CONFIG_SCSI_CONSTANTS */ | |
1336 | ||
1abfd370 | 1337 | int spi_print_msg(const unsigned char *msg) |
410ca5c7 | 1338 | { |
72df0ebf | 1339 | int len = 1, i; |
410ca5c7 MW |
1340 | |
1341 | if (msg[0] == EXTENDED_MESSAGE) { | |
fc25307d MW |
1342 | len = 2 + msg[1]; |
1343 | if (len == 2) | |
1344 | len += 256; | |
410ca5c7 MW |
1345 | for (i = 0; i < len; ++i) |
1346 | printk("%02x ", msg[i]); | |
1347 | /* Identify */ | |
1348 | } else if (msg[0] & 0x80) { | |
1349 | printk("%02x ", msg[0]); | |
410ca5c7 | 1350 | /* Normal One byte */ |
597705aa | 1351 | } else if ((msg[0] < 0x1f) || (msg[0] == 0x55)) { |
410ca5c7 | 1352 | printk("%02x ", msg[0]); |
410ca5c7 MW |
1353 | /* Two byte */ |
1354 | } else if (msg[0] <= 0x2f) { | |
1355 | printk("%02x %02x", msg[0], msg[1]); | |
1356 | len = 2; | |
1357 | } else | |
1358 | printk("%02x ", msg[0]); | |
1359 | return len; | |
1360 | } | |
1abfd370 | 1361 | EXPORT_SYMBOL(spi_print_msg); |
410ca5c7 MW |
1362 | #endif /* ! CONFIG_SCSI_CONSTANTS */ |
1363 | ||
1da177e4 LT |
1364 | static int spi_device_match(struct attribute_container *cont, |
1365 | struct device *dev) | |
1366 | { | |
1367 | struct scsi_device *sdev; | |
1368 | struct Scsi_Host *shost; | |
10c1b889 | 1369 | struct spi_internal *i; |
1da177e4 LT |
1370 | |
1371 | if (!scsi_is_sdev_device(dev)) | |
1372 | return 0; | |
1373 | ||
1374 | sdev = to_scsi_device(dev); | |
1375 | shost = sdev->host; | |
1376 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1377 | != &spi_host_class.class) | |
1378 | return 0; | |
1379 | /* Note: this class has no device attributes, so it has | |
1380 | * no per-HBA allocation and thus we don't need to distinguish | |
1381 | * the attribute containers for the device */ | |
10c1b889 JB |
1382 | i = to_spi_internal(shost->transportt); |
1383 | if (i->f->deny_binding && i->f->deny_binding(sdev->sdev_target)) | |
1384 | return 0; | |
1da177e4 LT |
1385 | return 1; |
1386 | } | |
1387 | ||
1388 | static int spi_target_match(struct attribute_container *cont, | |
1389 | struct device *dev) | |
1390 | { | |
1391 | struct Scsi_Host *shost; | |
10c1b889 | 1392 | struct scsi_target *starget; |
1da177e4 LT |
1393 | struct spi_internal *i; |
1394 | ||
1395 | if (!scsi_is_target_device(dev)) | |
1396 | return 0; | |
1397 | ||
1398 | shost = dev_to_shost(dev->parent); | |
1399 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1400 | != &spi_host_class.class) | |
1401 | return 0; | |
1402 | ||
1403 | i = to_spi_internal(shost->transportt); | |
10c1b889 JB |
1404 | starget = to_scsi_target(dev); |
1405 | ||
1406 | if (i->f->deny_binding && i->f->deny_binding(starget)) | |
1407 | return 0; | |
1408 | ||
1da177e4 LT |
1409 | return &i->t.target_attrs.ac == cont; |
1410 | } | |
1411 | ||
1412 | static DECLARE_TRANSPORT_CLASS(spi_transport_class, | |
1413 | "spi_transport", | |
1414 | spi_setup_transport_attrs, | |
1415 | NULL, | |
9b161a4d | 1416 | spi_target_configure); |
1da177e4 LT |
1417 | |
1418 | static DECLARE_ANON_TRANSPORT_CLASS(spi_device_class, | |
1419 | spi_device_match, | |
1420 | spi_device_configure); | |
1421 | ||
9b161a4d | 1422 | static struct attribute *host_attributes[] = { |
ee959b00 | 1423 | &dev_attr_signalling.attr, |
0ac2377b HR |
1424 | &dev_attr_host_width.attr, |
1425 | &dev_attr_hba_id.attr, | |
9b161a4d JB |
1426 | NULL |
1427 | }; | |
1428 | ||
1429 | static struct attribute_group host_attribute_group = { | |
1430 | .attrs = host_attributes, | |
1431 | }; | |
1432 | ||
1433 | static int spi_host_configure(struct transport_container *tc, | |
1434 | struct device *dev, | |
ee959b00 | 1435 | struct device *cdev) |
9b161a4d JB |
1436 | { |
1437 | struct kobject *kobj = &cdev->kobj; | |
1438 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1439 | struct spi_internal *si = to_spi_internal(shost->transportt); | |
ee959b00 | 1440 | struct attribute *attr = &dev_attr_signalling.attr; |
9b161a4d JB |
1441 | int rc = 0; |
1442 | ||
1443 | if (si->f->set_signalling) | |
1444 | rc = sysfs_chmod_file(kobj, attr, attr->mode | S_IWUSR); | |
1445 | ||
1446 | return rc; | |
1447 | } | |
1448 | ||
1449 | /* returns true if we should be showing the variable. Also | |
1450 | * overloads the return by setting 1<<1 if the attribute should | |
1451 | * be writeable */ | |
1452 | #define TARGET_ATTRIBUTE_HELPER(name) \ | |
352f6bb4 JB |
1453 | (si->f->show_##name ? S_IRUGO : 0) | \ |
1454 | (si->f->set_##name ? S_IWUSR : 0) | |
9b161a4d | 1455 | |
587a1f16 | 1456 | static umode_t target_attribute_is_visible(struct kobject *kobj, |
352f6bb4 | 1457 | struct attribute *attr, int i) |
9b161a4d | 1458 | { |
ee959b00 | 1459 | struct device *cdev = container_of(kobj, struct device, kobj); |
9b161a4d JB |
1460 | struct scsi_target *starget = transport_class_to_starget(cdev); |
1461 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1462 | struct spi_internal *si = to_spi_internal(shost->transportt); | |
1463 | ||
ee959b00 | 1464 | if (attr == &dev_attr_period.attr && |
9b161a4d JB |
1465 | spi_support_sync(starget)) |
1466 | return TARGET_ATTRIBUTE_HELPER(period); | |
ee959b00 | 1467 | else if (attr == &dev_attr_min_period.attr && |
9b161a4d JB |
1468 | spi_support_sync(starget)) |
1469 | return TARGET_ATTRIBUTE_HELPER(period); | |
ee959b00 | 1470 | else if (attr == &dev_attr_offset.attr && |
9b161a4d JB |
1471 | spi_support_sync(starget)) |
1472 | return TARGET_ATTRIBUTE_HELPER(offset); | |
ee959b00 | 1473 | else if (attr == &dev_attr_max_offset.attr && |
9b161a4d JB |
1474 | spi_support_sync(starget)) |
1475 | return TARGET_ATTRIBUTE_HELPER(offset); | |
ee959b00 | 1476 | else if (attr == &dev_attr_width.attr && |
9b161a4d JB |
1477 | spi_support_wide(starget)) |
1478 | return TARGET_ATTRIBUTE_HELPER(width); | |
ee959b00 | 1479 | else if (attr == &dev_attr_max_width.attr && |
9b161a4d JB |
1480 | spi_support_wide(starget)) |
1481 | return TARGET_ATTRIBUTE_HELPER(width); | |
ee959b00 | 1482 | else if (attr == &dev_attr_iu.attr && |
9b161a4d JB |
1483 | spi_support_ius(starget)) |
1484 | return TARGET_ATTRIBUTE_HELPER(iu); | |
ea443190 JB |
1485 | else if (attr == &dev_attr_max_iu.attr && |
1486 | spi_support_ius(starget)) | |
1487 | return TARGET_ATTRIBUTE_HELPER(iu); | |
ee959b00 | 1488 | else if (attr == &dev_attr_dt.attr && |
9b161a4d JB |
1489 | spi_support_dt(starget)) |
1490 | return TARGET_ATTRIBUTE_HELPER(dt); | |
ee959b00 | 1491 | else if (attr == &dev_attr_qas.attr && |
9b161a4d JB |
1492 | spi_support_qas(starget)) |
1493 | return TARGET_ATTRIBUTE_HELPER(qas); | |
ea443190 JB |
1494 | else if (attr == &dev_attr_max_qas.attr && |
1495 | spi_support_qas(starget)) | |
1496 | return TARGET_ATTRIBUTE_HELPER(qas); | |
ee959b00 | 1497 | else if (attr == &dev_attr_wr_flow.attr && |
9b161a4d JB |
1498 | spi_support_ius(starget)) |
1499 | return TARGET_ATTRIBUTE_HELPER(wr_flow); | |
ee959b00 | 1500 | else if (attr == &dev_attr_rd_strm.attr && |
9b161a4d JB |
1501 | spi_support_ius(starget)) |
1502 | return TARGET_ATTRIBUTE_HELPER(rd_strm); | |
ee959b00 | 1503 | else if (attr == &dev_attr_rti.attr && |
9b161a4d JB |
1504 | spi_support_ius(starget)) |
1505 | return TARGET_ATTRIBUTE_HELPER(rti); | |
ee959b00 | 1506 | else if (attr == &dev_attr_pcomp_en.attr && |
9b161a4d JB |
1507 | spi_support_ius(starget)) |
1508 | return TARGET_ATTRIBUTE_HELPER(pcomp_en); | |
ee959b00 | 1509 | else if (attr == &dev_attr_hold_mcs.attr && |
9b161a4d JB |
1510 | spi_support_ius(starget)) |
1511 | return TARGET_ATTRIBUTE_HELPER(hold_mcs); | |
ee959b00 | 1512 | else if (attr == &dev_attr_revalidate.attr) |
352f6bb4 | 1513 | return S_IWUSR; |
9b161a4d JB |
1514 | |
1515 | return 0; | |
1516 | } | |
1517 | ||
1518 | static struct attribute *target_attributes[] = { | |
ee959b00 TJ |
1519 | &dev_attr_period.attr, |
1520 | &dev_attr_min_period.attr, | |
1521 | &dev_attr_offset.attr, | |
1522 | &dev_attr_max_offset.attr, | |
1523 | &dev_attr_width.attr, | |
1524 | &dev_attr_max_width.attr, | |
1525 | &dev_attr_iu.attr, | |
ea443190 | 1526 | &dev_attr_max_iu.attr, |
ee959b00 TJ |
1527 | &dev_attr_dt.attr, |
1528 | &dev_attr_qas.attr, | |
ea443190 | 1529 | &dev_attr_max_qas.attr, |
ee959b00 TJ |
1530 | &dev_attr_wr_flow.attr, |
1531 | &dev_attr_rd_strm.attr, | |
1532 | &dev_attr_rti.attr, | |
1533 | &dev_attr_pcomp_en.attr, | |
1534 | &dev_attr_hold_mcs.attr, | |
1535 | &dev_attr_revalidate.attr, | |
9b161a4d JB |
1536 | NULL |
1537 | }; | |
1538 | ||
1539 | static struct attribute_group target_attribute_group = { | |
1540 | .attrs = target_attributes, | |
1541 | .is_visible = target_attribute_is_visible, | |
1542 | }; | |
1543 | ||
1544 | static int spi_target_configure(struct transport_container *tc, | |
1545 | struct device *dev, | |
ee959b00 | 1546 | struct device *cdev) |
9b161a4d JB |
1547 | { |
1548 | struct kobject *kobj = &cdev->kobj; | |
352f6bb4 JB |
1549 | |
1550 | /* force an update based on parameters read from the device */ | |
1551 | sysfs_update_group(kobj, &target_attribute_group); | |
9b161a4d JB |
1552 | |
1553 | return 0; | |
1554 | } | |
1555 | ||
1da177e4 LT |
1556 | struct scsi_transport_template * |
1557 | spi_attach_transport(struct spi_function_template *ft) | |
1558 | { | |
24669f75 JS |
1559 | struct spi_internal *i = kzalloc(sizeof(struct spi_internal), |
1560 | GFP_KERNEL); | |
1561 | ||
1da177e4 LT |
1562 | if (unlikely(!i)) |
1563 | return NULL; | |
1564 | ||
1da177e4 | 1565 | i->t.target_attrs.ac.class = &spi_transport_class.class; |
9b161a4d | 1566 | i->t.target_attrs.ac.grp = &target_attribute_group; |
1da177e4 LT |
1567 | i->t.target_attrs.ac.match = spi_target_match; |
1568 | transport_container_register(&i->t.target_attrs); | |
1569 | i->t.target_size = sizeof(struct spi_transport_attrs); | |
1570 | i->t.host_attrs.ac.class = &spi_host_class.class; | |
9b161a4d | 1571 | i->t.host_attrs.ac.grp = &host_attribute_group; |
1da177e4 LT |
1572 | i->t.host_attrs.ac.match = spi_host_match; |
1573 | transport_container_register(&i->t.host_attrs); | |
1574 | i->t.host_size = sizeof(struct spi_host_attrs); | |
1575 | i->f = ft; | |
1576 | ||
1da177e4 LT |
1577 | return &i->t; |
1578 | } | |
1579 | EXPORT_SYMBOL(spi_attach_transport); | |
1580 | ||
1581 | void spi_release_transport(struct scsi_transport_template *t) | |
1582 | { | |
1583 | struct spi_internal *i = to_spi_internal(t); | |
1584 | ||
1585 | transport_container_unregister(&i->t.target_attrs); | |
1586 | transport_container_unregister(&i->t.host_attrs); | |
1587 | ||
1588 | kfree(i); | |
1589 | } | |
1590 | EXPORT_SYMBOL(spi_release_transport); | |
1591 | ||
1592 | static __init int spi_transport_init(void) | |
1593 | { | |
a9e0edb6 JB |
1594 | int error = scsi_dev_info_add_list(SCSI_DEVINFO_SPI, |
1595 | "SCSI Parallel Transport Class"); | |
1596 | if (!error) { | |
1597 | int i; | |
1598 | ||
1599 | for (i = 0; spi_static_device_list[i].vendor; i++) | |
1600 | scsi_dev_info_list_add_keyed(1, /* compatible */ | |
1601 | spi_static_device_list[i].vendor, | |
1602 | spi_static_device_list[i].model, | |
1603 | NULL, | |
1604 | spi_static_device_list[i].flags, | |
1605 | SCSI_DEVINFO_SPI); | |
1606 | } | |
1607 | ||
1608 | error = transport_class_register(&spi_transport_class); | |
1da177e4 LT |
1609 | if (error) |
1610 | return error; | |
1611 | error = anon_transport_class_register(&spi_device_class); | |
1612 | return transport_class_register(&spi_host_class); | |
1613 | } | |
1614 | ||
1615 | static void __exit spi_transport_exit(void) | |
1616 | { | |
1617 | transport_class_unregister(&spi_transport_class); | |
1618 | anon_transport_class_unregister(&spi_device_class); | |
1619 | transport_class_unregister(&spi_host_class); | |
a9e0edb6 | 1620 | scsi_dev_info_remove_list(SCSI_DEVINFO_SPI); |
1da177e4 LT |
1621 | } |
1622 | ||
1623 | MODULE_AUTHOR("Martin Hicks"); | |
1624 | MODULE_DESCRIPTION("SPI Transport Attributes"); | |
1625 | MODULE_LICENSE("GPL"); | |
1626 | ||
1627 | module_init(spi_transport_init); | |
1628 | module_exit(spi_transport_exit); |